diff options
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmsmac/main.c')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmsmac/main.c | 8775 |
1 files changed, 8775 insertions, 0 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/main.c b/drivers/net/wireless/brcm80211/brcmsmac/main.c new file mode 100644 index 000000000000..510e9bb52287 --- /dev/null +++ b/drivers/net/wireless/brcm80211/brcmsmac/main.c @@ -0,0 +1,8775 @@ +/* + * Copyright (c) 2010 Broadcom Corporation + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <linux/pci_ids.h> +#include <linux/if_ether.h> +#include <net/mac80211.h> +#include <brcm_hw_ids.h> +#include <aiutils.h> +#include <chipcommon.h> +#include "rate.h" +#include "scb.h" +#include "phy/phy_hal.h" +#include "channel.h" +#include "antsel.h" +#include "stf.h" +#include "ampdu.h" +#include "mac80211_if.h" +#include "ucode_loader.h" +#include "main.h" + +/* + * Indication for txflowcontrol that all priority bits in + * TXQ_STOP_FOR_PRIOFC_MASK are to be considered. + */ +#define ALLPRIO -1 + +/* + * 32 SSID chars, max of 4 chars for each SSID char "\xFF", plus NULL. + */ +#define SSID_FMT_BUF_LEN ((4 * IEEE80211_MAX_SSID_LEN) + 1) + +/* watchdog timer, in unit of ms */ +#define TIMER_INTERVAL_WATCHDOG 1000 +/* radio monitor timer, in unit of ms */ +#define TIMER_INTERVAL_RADIOCHK 800 + +/* Max MPC timeout, in unit of watchdog */ +#ifndef BRCMS_MPC_MAX_DELAYCNT +#define BRCMS_MPC_MAX_DELAYCNT 10 +#endif + +/* Min MPC timeout, in unit of watchdog */ +#define BRCMS_MPC_MIN_DELAYCNT 1 +#define BRCMS_MPC_THRESHOLD 3 /* MPC count threshold level */ + +/* beacon interval, in unit of 1024TU */ +#define BEACON_INTERVAL_DEFAULT 100 +/* DTIM interval, in unit of beacon interval */ +#define DTIM_INTERVAL_DEFAULT 3 + +/* Scale down delays to accommodate QT slow speed */ +/* beacon interval, in unit of 1024TU */ +#define BEACON_INTERVAL_DEF_QT 20 +/* DTIM interval, in unit of beacon interval */ +#define DTIM_INTERVAL_DEF_QT 1 + +#define TBTT_ALIGN_LEEWAY_US 100 /* min leeway before first TBTT in us */ + +/* n-mode support capability */ +/* 2x2 includes both 1x1 & 2x2 devices + * reserved #define 2 for future when we want to separate 1x1 & 2x2 and + * control it independently + */ +#define WL_11N_2x2 1 +#define WL_11N_3x3 3 +#define WL_11N_4x4 4 + +/* define 11n feature disable flags */ +#define WLFEATURE_DISABLE_11N 0x00000001 +#define WLFEATURE_DISABLE_11N_STBC_TX 0x00000002 +#define WLFEATURE_DISABLE_11N_STBC_RX 0x00000004 +#define WLFEATURE_DISABLE_11N_SGI_TX 0x00000008 +#define WLFEATURE_DISABLE_11N_SGI_RX 0x00000010 +#define WLFEATURE_DISABLE_11N_AMPDU_TX 0x00000020 +#define WLFEATURE_DISABLE_11N_AMPDU_RX 0x00000040 +#define WLFEATURE_DISABLE_11N_GF 0x00000080 + +#define EDCF_ACI_MASK 0x60 +#define EDCF_ACI_SHIFT 5 +#define EDCF_ECWMIN_MASK 0x0f +#define EDCF_ECWMAX_SHIFT 4 +#define EDCF_AIFSN_MASK 0x0f +#define EDCF_AIFSN_MAX 15 +#define EDCF_ECWMAX_MASK 0xf0 + +#define EDCF_AC_BE_TXOP_STA 0x0000 +#define EDCF_AC_BK_TXOP_STA 0x0000 +#define EDCF_AC_VO_ACI_STA 0x62 +#define EDCF_AC_VO_ECW_STA 0x32 +#define EDCF_AC_VI_ACI_STA 0x42 +#define EDCF_AC_VI_ECW_STA 0x43 +#define EDCF_AC_BK_ECW_STA 0xA4 +#define EDCF_AC_VI_TXOP_STA 0x005e +#define EDCF_AC_VO_TXOP_STA 0x002f +#define EDCF_AC_BE_ACI_STA 0x03 +#define EDCF_AC_BE_ECW_STA 0xA4 +#define EDCF_AC_BK_ACI_STA 0x27 +#define EDCF_AC_VO_TXOP_AP 0x002f + +#define EDCF_TXOP2USEC(txop) ((txop) << 5) +#define EDCF_ECW2CW(exp) ((1 << (exp)) - 1) + +#define APHY_SYMBOL_TIME 4 +#define APHY_PREAMBLE_TIME 16 +#define APHY_SIGNAL_TIME 4 +#define APHY_SIFS_TIME 16 +#define APHY_SERVICE_NBITS 16 +#define APHY_TAIL_NBITS 6 +#define BPHY_SIFS_TIME 10 +#define BPHY_PLCP_SHORT_TIME 96 + +#define PREN_PREAMBLE 24 +#define PREN_MM_EXT 12 +#define PREN_PREAMBLE_EXT 4 + +#define DOT11_MAC_HDR_LEN 24 +#define DOT11_ACK_LEN 10 +#define DOT11_BA_LEN 4 +#define DOT11_OFDM_SIGNAL_EXTENSION 6 +#define DOT11_MIN_FRAG_LEN 256 +#define DOT11_RTS_LEN 16 +#define DOT11_CTS_LEN 10 +#define DOT11_BA_BITMAP_LEN 128 +#define DOT11_MIN_BEACON_PERIOD 1 +#define DOT11_MAX_BEACON_PERIOD 0xFFFF +#define DOT11_MAXNUMFRAGS 16 +#define DOT11_MAX_FRAG_LEN 2346 + +#define BPHY_PLCP_TIME 192 +#define RIFS_11N_TIME 2 + +#define WME_VER 1 +#define WME_SUBTYPE_PARAM_IE 1 +#define WME_TYPE 2 +#define WME_OUI "\x00\x50\xf2" + +#define AC_BE 0 +#define AC_BK 1 +#define AC_VI 2 +#define AC_VO 3 + +#define BCN_TMPL_LEN 512 /* length of the BCN template area */ + +/* brcms_bss_info flag bit values */ +#define BRCMS_BSS_HT 0x0020 /* BSS is HT (MIMO) capable */ + +/* Flags used in brcms_c_txq_info.stopped */ +/* per prio flow control bits */ +#define TXQ_STOP_FOR_PRIOFC_MASK 0x000000FF +/* stop txq enqueue for packet drain */ +#define TXQ_STOP_FOR_PKT_DRAIN 0x00000100 +/* stop txq enqueue for ampdu flow control */ +#define TXQ_STOP_FOR_AMPDU_FLOW_CNTRL 0x00000200 + +#define BRCMS_HWRXOFF 38 /* chip rx buffer offset */ + +/* Find basic rate for a given rate */ +static u8 brcms_basic_rate(struct brcms_c_info *wlc, u32 rspec) +{ + if (is_mcs_rate(rspec)) + return wlc->band->basic_rate[mcs_table[rspec & RSPEC_RATE_MASK] + .leg_ofdm]; + return wlc->band->basic_rate[rspec & RSPEC_RATE_MASK]; +} + +static u16 frametype(u32 rspec, u8 mimoframe) +{ + if (is_mcs_rate(rspec)) + return mimoframe; + return is_cck_rate(rspec) ? FT_CCK : FT_OFDM; +} + +/* rfdisable delay timer 500 ms, runs of ALP clock */ +#define RFDISABLE_DEFAULT 10000000 + +#define BRCMS_TEMPSENSE_PERIOD 10 /* 10 second timeout */ + +/* precedences numbers for wlc queues. These are twice as may levels as + * 802.1D priorities. + * Odd numbers are used for HI priority traffic at same precedence levels + * These constants are used ONLY by wlc_prio2prec_map. Do not use them + * elsewhere. + */ +#define _BRCMS_PREC_NONE 0 /* None = - */ +#define _BRCMS_PREC_BK 2 /* BK - Background */ +#define _BRCMS_PREC_BE 4 /* BE - Best-effort */ +#define _BRCMS_PREC_EE 6 /* EE - Excellent-effort */ +#define _BRCMS_PREC_CL 8 /* CL - Controlled Load */ +#define _BRCMS_PREC_VI 10 /* Vi - Video */ +#define _BRCMS_PREC_VO 12 /* Vo - Voice */ +#define _BRCMS_PREC_NC 14 /* NC - Network Control */ + +/* The BSS is generating beacons in HW */ +#define BRCMS_BSSCFG_HW_BCN 0x20 + +#define SYNTHPU_DLY_APHY_US 3700 /* a phy synthpu_dly time in us */ +#define SYNTHPU_DLY_BPHY_US 1050 /* b/g phy synthpu_dly time in us */ +#define SYNTHPU_DLY_NPHY_US 2048 /* n phy REV3 synthpu_dly time in us */ +#define SYNTHPU_DLY_LPPHY_US 300 /* lpphy synthpu_dly time in us */ + +#define SYNTHPU_DLY_PHY_US_QT 100 /* QT synthpu_dly time in us */ + +#define ANTCNT 10 /* vanilla M_MAX_ANTCNT value */ + +/* Per-AC retry limit register definitions; uses defs.h bitfield macros */ +#define EDCF_SHORT_S 0 +#define EDCF_SFB_S 4 +#define EDCF_LONG_S 8 +#define EDCF_LFB_S 12 +#define EDCF_SHORT_M BITFIELD_MASK(4) +#define EDCF_SFB_M BITFIELD_MASK(4) +#define EDCF_LONG_M BITFIELD_MASK(4) +#define EDCF_LFB_M BITFIELD_MASK(4) + +#define RETRY_SHORT_DEF 7 /* Default Short retry Limit */ +#define RETRY_SHORT_MAX 255 /* Maximum Short retry Limit */ +#define RETRY_LONG_DEF 4 /* Default Long retry count */ +#define RETRY_SHORT_FB 3 /* Short count for fallback rate */ +#define RETRY_LONG_FB 2 /* Long count for fallback rate */ + +#define APHY_CWMIN 15 +#define PHY_CWMAX 1023 + +#define EDCF_AIFSN_MIN 1 + +#define FRAGNUM_MASK 0xF + +#define APHY_SLOT_TIME 9 +#define BPHY_SLOT_TIME 20 + +#define WL_SPURAVOID_OFF 0 +#define WL_SPURAVOID_ON1 1 +#define WL_SPURAVOID_ON2 2 + +/* invalid core flags, use the saved coreflags */ +#define BRCMS_USE_COREFLAGS 0xffffffff + +/* values for PLCPHdr_override */ +#define BRCMS_PLCP_AUTO -1 +#define BRCMS_PLCP_SHORT 0 +#define BRCMS_PLCP_LONG 1 + +/* values for g_protection_override and n_protection_override */ +#define BRCMS_PROTECTION_AUTO -1 +#define BRCMS_PROTECTION_OFF 0 +#define BRCMS_PROTECTION_ON 1 +#define BRCMS_PROTECTION_MMHDR_ONLY 2 +#define BRCMS_PROTECTION_CTS_ONLY 3 + +/* values for g_protection_control and n_protection_control */ +#define BRCMS_PROTECTION_CTL_OFF 0 +#define BRCMS_PROTECTION_CTL_LOCAL 1 +#define BRCMS_PROTECTION_CTL_OVERLAP 2 + +/* values for n_protection */ +#define BRCMS_N_PROTECTION_OFF 0 +#define BRCMS_N_PROTECTION_OPTIONAL 1 +#define BRCMS_N_PROTECTION_20IN40 2 +#define BRCMS_N_PROTECTION_MIXEDMODE 3 + +/* values for band specific 40MHz capabilities */ +#define BRCMS_N_BW_20ALL 0 +#define BRCMS_N_BW_40ALL 1 +#define BRCMS_N_BW_20IN2G_40IN5G 2 + +/* bitflags for SGI support (sgi_rx iovar) */ +#define BRCMS_N_SGI_20 0x01 +#define BRCMS_N_SGI_40 0x02 + +/* defines used by the nrate iovar */ +/* MSC in use,indicates b0-6 holds an mcs */ +#define NRATE_MCS_INUSE 0x00000080 +/* rate/mcs value */ +#define NRATE_RATE_MASK 0x0000007f +/* stf mode mask: siso, cdd, stbc, sdm */ +#define NRATE_STF_MASK 0x0000ff00 +/* stf mode shift */ +#define NRATE_STF_SHIFT 8 +/* bit indicates override both rate & mode */ +#define NRATE_OVERRIDE 0x80000000 +/* bit indicate to override mcs only */ +#define NRATE_OVERRIDE_MCS_ONLY 0x40000000 +#define NRATE_SGI_MASK 0x00800000 /* sgi mode */ +#define NRATE_SGI_SHIFT 23 /* sgi mode */ +#define NRATE_LDPC_CODING 0x00400000 /* bit indicates adv coding in use */ +#define NRATE_LDPC_SHIFT 22 /* ldpc shift */ + +#define NRATE_STF_SISO 0 /* stf mode SISO */ +#define NRATE_STF_CDD 1 /* stf mode CDD */ +#define NRATE_STF_STBC 2 /* stf mode STBC */ +#define NRATE_STF_SDM 3 /* stf mode SDM */ + +#define MAX_DMA_SEGS 4 + +/* Max # of entries in Tx FIFO based on 4kb page size */ +#define NTXD 256 +/* Max # of entries in Rx FIFO based on 4kb page size */ +#define NRXD 256 + +/* try to keep this # rbufs posted to the chip */ +#define NRXBUFPOST 32 + +/* data msg txq hiwat mark */ +#define BRCMS_DATAHIWAT 50 + +/* bounded rx loops */ +#define RXBND 8 /* max # frames to process in brcms_c_recv() */ +#define TXSBND 8 /* max # tx status to process in wlc_txstatus() */ + +/* + * 32 SSID chars, max of 4 chars for each SSID char "\xFF", plus NULL. + */ +#define SSID_FMT_BUF_LEN ((4 * IEEE80211_MAX_SSID_LEN) + 1) + +/* brcmu_format_flags() bit description structure */ +struct brcms_c_bit_desc { + u32 bit; + const char *name; +}; + +/* + * The following table lists the buffer memory allocated to xmt fifos in HW. + * the size is in units of 256bytes(one block), total size is HW dependent + * ucode has default fifo partition, sw can overwrite if necessary + * + * This is documented in twiki under the topic UcodeTxFifo. Please ensure + * the twiki is updated before making changes. + */ + +/* Starting corerev for the fifo size table */ +#define XMTFIFOTBL_STARTREV 20 + +struct d11init { + __le16 addr; + __le16 size; + __le32 value; +}; + +struct edcf_acparam { + u8 ACI; + u8 ECW; + u16 TXOP; +} __packed; + +const u8 prio2fifo[NUMPRIO] = { + TX_AC_BE_FIFO, /* 0 BE AC_BE Best Effort */ + TX_AC_BK_FIFO, /* 1 BK AC_BK Background */ + TX_AC_BK_FIFO, /* 2 -- AC_BK Background */ + TX_AC_BE_FIFO, /* 3 EE AC_BE Best Effort */ + TX_AC_VI_FIFO, /* 4 CL AC_VI Video */ + TX_AC_VI_FIFO, /* 5 VI AC_VI Video */ + TX_AC_VO_FIFO, /* 6 VO AC_VO Voice */ + TX_AC_VO_FIFO /* 7 NC AC_VO Voice */ +}; + +/* debug/trace */ +uint brcm_msg_level = +#if defined(BCMDBG) + LOG_ERROR_VAL; +#else + 0; +#endif /* BCMDBG */ + +/* TX FIFO number to WME/802.1E Access Category */ +static const u8 wme_fifo2ac[] = { AC_BK, AC_BE, AC_VI, AC_VO, AC_BE, AC_BE }; + +/* WME/802.1E Access Category to TX FIFO number */ +static const u8 wme_ac2fifo[] = { 1, 0, 2, 3 }; + +/* 802.1D Priority to precedence queue mapping */ +const u8 wlc_prio2prec_map[] = { + _BRCMS_PREC_BE, /* 0 BE - Best-effort */ + _BRCMS_PREC_BK, /* 1 BK - Background */ + _BRCMS_PREC_NONE, /* 2 None = - */ + _BRCMS_PREC_EE, /* 3 EE - Excellent-effort */ + _BRCMS_PREC_CL, /* 4 CL - Controlled Load */ + _BRCMS_PREC_VI, /* 5 Vi - Video */ + _BRCMS_PREC_VO, /* 6 Vo - Voice */ + _BRCMS_PREC_NC, /* 7 NC - Network Control */ +}; + +static const u16 xmtfifo_sz[][NFIFO] = { + /* corerev 20: 5120, 49152, 49152, 5376, 4352, 1280 */ + {20, 192, 192, 21, 17, 5}, + /* corerev 21: 2304, 14848, 5632, 3584, 3584, 1280 */ + {9, 58, 22, 14, 14, 5}, + /* corerev 22: 5120, 49152, 49152, 5376, 4352, 1280 */ + {20, 192, 192, 21, 17, 5}, + /* corerev 23: 5120, 49152, 49152, 5376, 4352, 1280 */ + {20, 192, 192, 21, 17, 5}, + /* corerev 24: 2304, 14848, 5632, 3584, 3584, 1280 */ + {9, 58, 22, 14, 14, 5}, +}; + +static const u8 acbitmap2maxprio[] = { + PRIO_8021D_BE, PRIO_8021D_BE, PRIO_8021D_BK, PRIO_8021D_BK, + PRIO_8021D_VI, PRIO_8021D_VI, PRIO_8021D_VI, PRIO_8021D_VI, + PRIO_8021D_VO, PRIO_8021D_VO, PRIO_8021D_VO, PRIO_8021D_VO, + PRIO_8021D_VO, PRIO_8021D_VO, PRIO_8021D_VO, PRIO_8021D_VO +}; + +#ifdef BCMDBG +static const char * const fifo_names[] = { + "AC_BK", "AC_BE", "AC_VI", "AC_VO", "BCMC", "ATIM" }; +#else +static const char fifo_names[6][0]; +#endif + +#ifdef BCMDBG +/* pointer to most recently allocated wl/wlc */ +static struct brcms_c_info *wlc_info_dbg = (struct brcms_c_info *) (NULL); +#endif + +/* currently the best mechanism for determining SIFS is the band in use */ +static u16 get_sifs(struct brcms_band *band) +{ + return band->bandtype == BRCM_BAND_5G ? APHY_SIFS_TIME : + BPHY_SIFS_TIME; +} + +/* + * Detect Card removed. + * Even checking an sbconfig register read will not false trigger when the core + * is in reset it breaks CF address mechanism. Accessing gphy phyversion will + * cause SB error if aphy is in reset on 4306B0-DB. Need a simple accessible + * reg with fixed 0/1 pattern (some platforms return all 0). + * If clocks are present, call the sb routine which will figure out if the + * device is removed. + */ +static bool brcms_deviceremoved(struct brcms_c_info *wlc) +{ + if (!wlc->hw->clk) + return ai_deviceremoved(wlc->hw->sih); + return (R_REG(&wlc->hw->regs->maccontrol) & + (MCTL_PSM_JMP_0 | MCTL_IHR_EN)) != MCTL_IHR_EN; +} + +/* sum the individual fifo tx pending packet counts */ +static s16 brcms_txpktpendtot(struct brcms_c_info *wlc) +{ + return wlc->core->txpktpend[0] + wlc->core->txpktpend[1] + + wlc->core->txpktpend[2] + wlc->core->txpktpend[3]; +} + +static bool brcms_is_mband_unlocked(struct brcms_c_info *wlc) +{ + return wlc->pub->_nbands > 1 && !wlc->bandlocked; +} + +static int brcms_chspec_bw(u16 chanspec) +{ + if (CHSPEC_IS40(chanspec)) + return BRCMS_40_MHZ; + if (CHSPEC_IS20(chanspec)) + return BRCMS_20_MHZ; + + return BRCMS_10_MHZ; +} + +/* + * return true if Minimum Power Consumption should + * be entered, false otherwise + */ +static bool brcms_c_is_non_delay_mpc(struct brcms_c_info *wlc) +{ + return false; +} + +static bool brcms_c_ismpc(struct brcms_c_info *wlc) +{ + return (wlc->mpc_delay_off == 0) && (brcms_c_is_non_delay_mpc(wlc)); +} + +static void brcms_c_bsscfg_mfree(struct brcms_bss_cfg *cfg) +{ + if (cfg == NULL) + return; + + kfree(cfg->current_bss); + kfree(cfg); +} + +static void brcms_c_detach_mfree(struct brcms_c_info *wlc) +{ + if (wlc == NULL) + return; + + brcms_c_bsscfg_mfree(wlc->bsscfg); + kfree(wlc->pub); + kfree(wlc->modulecb); + kfree(wlc->default_bss); + kfree(wlc->protection); + kfree(wlc->stf); + kfree(wlc->bandstate[0]); + kfree(wlc->corestate->macstat_snapshot); + kfree(wlc->corestate); + kfree(wlc->hw->bandstate[0]); + kfree(wlc->hw); + + /* free the wlc */ + kfree(wlc); + wlc = NULL; +} + +static struct brcms_bss_cfg *brcms_c_bsscfg_malloc(uint unit) +{ + struct brcms_bss_cfg *cfg; + + cfg = kzalloc(sizeof(struct brcms_bss_cfg), GFP_ATOMIC); + if (cfg == NULL) + goto fail; + + cfg->current_bss = kzalloc(sizeof(struct brcms_bss_info), GFP_ATOMIC); + if (cfg->current_bss == NULL) + goto fail; + + return cfg; + + fail: + brcms_c_bsscfg_mfree(cfg); + return NULL; +} + +static struct brcms_c_info * +brcms_c_attach_malloc(uint unit, uint *err, uint devid) +{ + struct brcms_c_info *wlc; + + wlc = kzalloc(sizeof(struct brcms_c_info), GFP_ATOMIC); + if (wlc == NULL) { + *err = 1002; + goto fail; + } + + /* allocate struct brcms_c_pub state structure */ + wlc->pub = kzalloc(sizeof(struct brcms_pub), GFP_ATOMIC); + if (wlc->pub == NULL) { + *err = 1003; + goto fail; + } + wlc->pub->wlc = wlc; + + /* allocate struct brcms_hardware state structure */ + + wlc->hw = kzalloc(sizeof(struct brcms_hardware), GFP_ATOMIC); + if (wlc->hw == NULL) { + *err = 1005; + goto fail; + } + wlc->hw->wlc = wlc; + + wlc->hw->bandstate[0] = + kzalloc(sizeof(struct brcms_hw_band) * MAXBANDS, GFP_ATOMIC); + if (wlc->hw->bandstate[0] == NULL) { + *err = 1006; + goto fail; + } else { + int i; + + for (i = 1; i < MAXBANDS; i++) + wlc->hw->bandstate[i] = (struct brcms_hw_band *) + ((unsigned long)wlc->hw->bandstate[0] + + (sizeof(struct brcms_hw_band) * i)); + } + + wlc->modulecb = + kzalloc(sizeof(struct modulecb) * BRCMS_MAXMODULES, GFP_ATOMIC); + if (wlc->modulecb == NULL) { + *err = 1009; + goto fail; + } + + wlc->default_bss = kzalloc(sizeof(struct brcms_bss_info), GFP_ATOMIC); + if (wlc->default_bss == NULL) { + *err = 1010; + goto fail; + } + + wlc->bsscfg = brcms_c_bsscfg_malloc(unit); + if (wlc->bsscfg == NULL) { + *err = 1011; + goto fail; + } + + wlc->protection = kzalloc(sizeof(struct brcms_protection), + GFP_ATOMIC); + if (wlc->protection == NULL) { + *err = 1016; + goto fail; + } + + wlc->stf = kzalloc(sizeof(struct brcms_stf), GFP_ATOMIC); + if (wlc->stf == NULL) { + *err = 1017; + goto fail; + } + + wlc->bandstate[0] = + kzalloc(sizeof(struct brcms_band)*MAXBANDS, GFP_ATOMIC); + if (wlc->bandstate[0] == NULL) { + *err = 1025; + goto fail; + } else { + int i; + + for (i = 1; i < MAXBANDS; i++) + wlc->bandstate[i] = (struct brcms_band *) + ((unsigned long)wlc->bandstate[0] + + (sizeof(struct brcms_band)*i)); + } + + wlc->corestate = kzalloc(sizeof(struct brcms_core), GFP_ATOMIC); + if (wlc->corestate == NULL) { + *err = 1026; + goto fail; + } + + wlc->corestate->macstat_snapshot = + kzalloc(sizeof(struct macstat), GFP_ATOMIC); + if (wlc->corestate->macstat_snapshot == NULL) { + *err = 1027; + goto fail; + } + + return wlc; + + fail: + brcms_c_detach_mfree(wlc); + return NULL; +} + +/* + * Update the slot timing for standard 11b/g (20us slots) + * or shortslot 11g (9us slots) + * The PSM needs to be suspended for this call. + */ +static void brcms_b_update_slot_timing(struct brcms_hardware *wlc_hw, + bool shortslot) +{ + struct d11regs __iomem *regs; + + regs = wlc_hw->regs; + + if (shortslot) { + /* 11g short slot: 11a timing */ + W_REG(®s->ifs_slot, 0x0207); /* APHY_SLOT_TIME */ + brcms_b_write_shm(wlc_hw, M_DOT11_SLOT, APHY_SLOT_TIME); + } else { + /* 11g long slot: 11b timing */ + W_REG(®s->ifs_slot, 0x0212); /* BPHY_SLOT_TIME */ + brcms_b_write_shm(wlc_hw, M_DOT11_SLOT, BPHY_SLOT_TIME); + } +} + +/* + * calculate frame duration of a given rate and length, return + * time in usec unit + */ +uint +brcms_c_calc_frame_time(struct brcms_c_info *wlc, u32 ratespec, + u8 preamble_type, uint mac_len) +{ + uint nsyms, dur = 0, Ndps, kNdps; + uint rate = rspec2rate(ratespec); + + if (rate == 0) { + wiphy_err(wlc->wiphy, "wl%d: WAR: using rate of 1 mbps\n", + wlc->pub->unit); + rate = BRCM_RATE_1M; + } + + BCMMSG(wlc->wiphy, "wl%d: rspec 0x%x, preamble_type %d, len%d\n", + wlc->pub->unit, ratespec, preamble_type, mac_len); + + if (is_mcs_rate(ratespec)) { + uint mcs = ratespec & RSPEC_RATE_MASK; + int tot_streams = mcs_2_txstreams(mcs) + rspec_stc(ratespec); + + dur = PREN_PREAMBLE + (tot_streams * PREN_PREAMBLE_EXT); + if (preamble_type == BRCMS_MM_PREAMBLE) + dur += PREN_MM_EXT; + /* 1000Ndbps = kbps * 4 */ + kNdps = mcs_2_rate(mcs, rspec_is40mhz(ratespec), + rspec_issgi(ratespec)) * 4; + + if (rspec_stc(ratespec) == 0) + nsyms = + CEIL((APHY_SERVICE_NBITS + 8 * mac_len + + APHY_TAIL_NBITS) * 1000, kNdps); + else + /* STBC needs to have even number of symbols */ + nsyms = + 2 * + CEIL((APHY_SERVICE_NBITS + 8 * mac_len + + APHY_TAIL_NBITS) * 1000, 2 * kNdps); + + dur += APHY_SYMBOL_TIME * nsyms; + if (wlc->band->bandtype == BRCM_BAND_2G) + dur += DOT11_OFDM_SIGNAL_EXTENSION; + } else if (is_ofdm_rate(rate)) { + dur = APHY_PREAMBLE_TIME; + dur += APHY_SIGNAL_TIME; + /* Ndbps = Mbps * 4 = rate(500Kbps) * 2 */ + Ndps = rate * 2; + /* NSyms = CEILING((SERVICE + 8*NBytes + TAIL) / Ndbps) */ + nsyms = + CEIL((APHY_SERVICE_NBITS + 8 * mac_len + APHY_TAIL_NBITS), + Ndps); + dur += APHY_SYMBOL_TIME * nsyms; + if (wlc->band->bandtype == BRCM_BAND_2G) + dur += DOT11_OFDM_SIGNAL_EXTENSION; + } else { + /* + * calc # bits * 2 so factor of 2 in rate (1/2 mbps) + * will divide out + */ + mac_len = mac_len * 8 * 2; + /* calc ceiling of bits/rate = microseconds of air time */ + dur = (mac_len + rate - 1) / rate; + if (preamble_type & BRCMS_SHORT_PREAMBLE) + dur += BPHY_PLCP_SHORT_TIME; + else + dur += BPHY_PLCP_TIME; + } + return dur; +} + +static void brcms_c_write_inits(struct brcms_hardware *wlc_hw, + const struct d11init *inits) +{ + int i; + u8 __iomem *base; + u8 __iomem *addr; + u16 size; + u32 value; + + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + + base = (u8 __iomem *)wlc_hw->regs; + + for (i = 0; inits[i].addr != cpu_to_le16(0xffff); i++) { + size = le16_to_cpu(inits[i].size); + addr = base + le16_to_cpu(inits[i].addr); + value = le32_to_cpu(inits[i].value); + if (size == 2) + W_REG((u16 __iomem *)addr, value); + else if (size == 4) + W_REG((u32 __iomem *)addr, value); + else + break; + } +} + +static void brcms_c_write_mhf(struct brcms_hardware *wlc_hw, u16 *mhfs) +{ + u8 idx; + u16 addr[] = { + M_HOST_FLAGS1, M_HOST_FLAGS2, M_HOST_FLAGS3, M_HOST_FLAGS4, + M_HOST_FLAGS5 + }; + + for (idx = 0; idx < MHFMAX; idx++) + brcms_b_write_shm(wlc_hw, addr[idx], mhfs[idx]); +} + +static void brcms_c_ucode_bsinit(struct brcms_hardware *wlc_hw) +{ + struct wiphy *wiphy = wlc_hw->wlc->wiphy; + struct brcms_ucode *ucode = &wlc_hw->wlc->wl->ucode; + + /* init microcode host flags */ + brcms_c_write_mhf(wlc_hw, wlc_hw->band->mhfs); + + /* do band-specific ucode IHR, SHM, and SCR inits */ + if (D11REV_IS(wlc_hw->corerev, 23)) { + if (BRCMS_ISNPHY(wlc_hw->band)) + brcms_c_write_inits(wlc_hw, ucode->d11n0bsinitvals16); + else + wiphy_err(wiphy, "%s: wl%d: unsupported phy in corerev" + " %d\n", __func__, wlc_hw->unit, + wlc_hw->corerev); + } else { + if (D11REV_IS(wlc_hw->corerev, 24)) { + if (BRCMS_ISLCNPHY(wlc_hw->band)) + brcms_c_write_inits(wlc_hw, + ucode->d11lcn0bsinitvals24); + else + wiphy_err(wiphy, "%s: wl%d: unsupported phy in" + " core rev %d\n", __func__, + wlc_hw->unit, wlc_hw->corerev); + } else { + wiphy_err(wiphy, "%s: wl%d: unsupported corerev %d\n", + __func__, wlc_hw->unit, wlc_hw->corerev); + } + } +} + +static void brcms_b_core_phy_clk(struct brcms_hardware *wlc_hw, bool clk) +{ + BCMMSG(wlc_hw->wlc->wiphy, "wl%d: clk %d\n", wlc_hw->unit, clk); + + wlc_hw->phyclk = clk; + + if (OFF == clk) { /* clear gmode bit, put phy into reset */ + + ai_core_cflags(wlc_hw->sih, (SICF_PRST | SICF_FGC | SICF_GMODE), + (SICF_PRST | SICF_FGC)); + udelay(1); + ai_core_cflags(wlc_hw->sih, (SICF_PRST | SICF_FGC), SICF_PRST); + udelay(1); + + } else { /* take phy out of reset */ + + ai_core_cflags(wlc_hw->sih, (SICF_PRST | SICF_FGC), SICF_FGC); + udelay(1); + ai_core_cflags(wlc_hw->sih, (SICF_FGC), 0); + udelay(1); + + } +} + +/* low-level band switch utility routine */ +static void brcms_c_setxband(struct brcms_hardware *wlc_hw, uint bandunit) +{ + BCMMSG(wlc_hw->wlc->wiphy, "wl%d: bandunit %d\n", wlc_hw->unit, + bandunit); + + wlc_hw->band = wlc_hw->bandstate[bandunit]; + + /* + * BMAC_NOTE: + * until we eliminate need for wlc->band refs in low level code + */ + wlc_hw->wlc->band = wlc_hw->wlc->bandstate[bandunit]; + + /* set gmode core flag */ + if (wlc_hw->sbclk && !wlc_hw->noreset) + ai_core_cflags(wlc_hw->sih, SICF_GMODE, + ((bandunit == 0) ? SICF_GMODE : 0)); +} + +/* switch to new band but leave it inactive */ +static u32 brcms_c_setband_inact(struct brcms_c_info *wlc, uint bandunit) +{ + struct brcms_hardware *wlc_hw = wlc->hw; + u32 macintmask; + + BCMMSG(wlc->wiphy, "wl%d\n", wlc_hw->unit); + + WARN_ON((R_REG(&wlc_hw->regs->maccontrol) & MCTL_EN_MAC) != 0); + + /* disable interrupts */ + macintmask = brcms_intrsoff(wlc->wl); + + /* radio off */ + wlc_phy_switch_radio(wlc_hw->band->pi, OFF); + + brcms_b_core_phy_clk(wlc_hw, OFF); + + brcms_c_setxband(wlc_hw, bandunit); + + return macintmask; +} + +/* process an individual struct tx_status */ +static bool +brcms_c_dotxstatus(struct brcms_c_info *wlc, struct tx_status *txs) +{ + struct sk_buff *p; + uint queue; + struct d11txh *txh; + struct scb *scb = NULL; + bool free_pdu; + int tx_rts, tx_frame_count, tx_rts_count; + uint totlen, supr_status; + bool lastframe; + struct ieee80211_hdr *h; + u16 mcl; + struct ieee80211_tx_info *tx_info; + struct ieee80211_tx_rate *txrate; + int i; + + /* discard intermediate indications for ucode with one legitimate case: + * e.g. if "useRTS" is set. ucode did a successful rts/cts exchange, + * but the subsequent tx of DATA failed. so it will start rts/cts + * from the beginning (resetting the rts transmission count) + */ + if (!(txs->status & TX_STATUS_AMPDU) + && (txs->status & TX_STATUS_INTERMEDIATE)) { + wiphy_err(wlc->wiphy, "%s: INTERMEDIATE but not AMPDU\n", + __func__); + return false; + } + + queue = txs->frameid & TXFID_QUEUE_MASK; + if (queue >= NFIFO) { + p = NULL; + goto fatal; + } + + p = dma_getnexttxp(wlc->hw->di[queue], DMA_RANGE_TRANSMITTED); + if (p == NULL) + goto fatal; + + txh = (struct d11txh *) (p->data); + mcl = le16_to_cpu(txh->MacTxControlLow); + + if (txs->phyerr) { + if (brcm_msg_level & LOG_ERROR_VAL) { + wiphy_err(wlc->wiphy, "phyerr 0x%x, rate 0x%x\n", + txs->phyerr, txh->MainRates); + brcms_c_print_txdesc(txh); + } + brcms_c_print_txstatus(txs); + } + + if (txs->frameid != le16_to_cpu(txh->TxFrameID)) + goto fatal; + tx_info = IEEE80211_SKB_CB(p); + h = (struct ieee80211_hdr *)((u8 *) (txh + 1) + D11_PHY_HDR_LEN); + + if (tx_info->control.sta) + scb = &wlc->pri_scb; + + if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { + brcms_c_ampdu_dotxstatus(wlc->ampdu, scb, p, txs); + return false; + } + + supr_status = txs->status & TX_STATUS_SUPR_MASK; + if (supr_status == TX_STATUS_SUPR_BADCH) + BCMMSG(wlc->wiphy, + "%s: Pkt tx suppressed, possibly channel %d\n", + __func__, CHSPEC_CHANNEL(wlc->default_bss->chanspec)); + + tx_rts = le16_to_cpu(txh->MacTxControlLow) & TXC_SENDRTS; + tx_frame_count = + (txs->status & TX_STATUS_FRM_RTX_MASK) >> TX_STATUS_FRM_RTX_SHIFT; + tx_rts_count = + (txs->status & TX_STATUS_RTS_RTX_MASK) >> TX_STATUS_RTS_RTX_SHIFT; + + lastframe = !ieee80211_has_morefrags(h->frame_control); + + if (!lastframe) { + wiphy_err(wlc->wiphy, "Not last frame!\n"); + } else { + /* + * Set information to be consumed by Minstrel ht. + * + * The "fallback limit" is the number of tx attempts a given + * MPDU is sent at the "primary" rate. Tx attempts beyond that + * limit are sent at the "secondary" rate. + * A 'short frame' does not exceed RTS treshold. + */ + u16 sfbl, /* Short Frame Rate Fallback Limit */ + lfbl, /* Long Frame Rate Fallback Limit */ + fbl; + + if (queue < AC_COUNT) { + sfbl = GFIELD(wlc->wme_retries[wme_fifo2ac[queue]], + EDCF_SFB); + lfbl = GFIELD(wlc->wme_retries[wme_fifo2ac[queue]], + EDCF_LFB); + } else { + sfbl = wlc->SFBL; + lfbl = wlc->LFBL; + } + + txrate = tx_info->status.rates; + if (txrate[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) + fbl = lfbl; + else + fbl = sfbl; + + ieee80211_tx_info_clear_status(tx_info); + + if ((tx_frame_count > fbl) && (txrate[1].idx >= 0)) { + /* + * rate selection requested a fallback rate + * and we used it + */ + txrate[0].count = fbl; + txrate[1].count = tx_frame_count - fbl; + } else { + /* + * rate selection did not request fallback rate, or + * we didn't need it + */ + txrate[0].count = tx_frame_count; + /* + * rc80211_minstrel.c:minstrel_tx_status() expects + * unused rates to be marked with idx = -1 + */ + txrate[1].idx = -1; + txrate[1].count = 0; + } + + /* clear the rest of the rates */ + for (i = 2; i < IEEE80211_TX_MAX_RATES; i++) { + txrate[i].idx = -1; + txrate[i].count = 0; + } + + if (txs->status & TX_STATUS_ACK_RCV) + tx_info->flags |= IEEE80211_TX_STAT_ACK; + } + + totlen = brcmu_pkttotlen(p); + free_pdu = true; + + brcms_c_txfifo_complete(wlc, queue, 1); + + if (lastframe) { + p->next = NULL; + p->prev = NULL; + /* remove PLCP & Broadcom tx descriptor header */ + skb_pull(p, D11_PHY_HDR_LEN); + skb_pull(p, D11_TXH_LEN); + ieee80211_tx_status_irqsafe(wlc->pub->ieee_hw, p); + } else { + wiphy_err(wlc->wiphy, "%s: Not last frame => not calling " + "tx_status\n", __func__); + } + + return false; + + fatal: + if (p) + brcmu_pkt_buf_free_skb(p); + + return true; + +} + +/* process tx completion events in BMAC + * Return true if more tx status need to be processed. false otherwise. + */ +static bool +brcms_b_txstatus(struct brcms_hardware *wlc_hw, bool bound, bool *fatal) +{ + bool morepending = false; + struct brcms_c_info *wlc = wlc_hw->wlc; + struct d11regs __iomem *regs; + struct tx_status txstatus, *txs; + u32 s1, s2; + uint n = 0; + /* + * Param 'max_tx_num' indicates max. # tx status to process before + * break out. + */ + uint max_tx_num = bound ? TXSBND : -1; + + BCMMSG(wlc->wiphy, "wl%d\n", wlc_hw->unit); + + txs = &txstatus; + regs = wlc_hw->regs; + *fatal = false; + while (!(*fatal) + && (s1 = R_REG(®s->frmtxstatus)) & TXS_V) { + + if (s1 == 0xffffffff) { + wiphy_err(wlc->wiphy, "wl%d: %s: dead chip\n", + wlc_hw->unit, __func__); + return morepending; + } + + s2 = R_REG(®s->frmtxstatus2); + + txs->status = s1 & TXS_STATUS_MASK; + txs->frameid = (s1 & TXS_FID_MASK) >> TXS_FID_SHIFT; + txs->sequence = s2 & TXS_SEQ_MASK; + txs->phyerr = (s2 & TXS_PTX_MASK) >> TXS_PTX_SHIFT; + txs->lasttxtime = 0; + + *fatal = brcms_c_dotxstatus(wlc_hw->wlc, txs); + + /* !give others some time to run! */ + if (++n >= max_tx_num) + break; + } + + if (*fatal) + return 0; + + if (n >= max_tx_num) + morepending = true; + + if (!pktq_empty(&wlc->pkt_queue->q)) + brcms_c_send_q(wlc); + + return morepending; +} + +static void brcms_c_tbtt(struct brcms_c_info *wlc) +{ + if (!wlc->bsscfg->BSS) + /* + * DirFrmQ is now valid...defer setting until end + * of ATIM window + */ + wlc->qvalid |= MCMD_DIRFRMQVAL; +} + +/* set initial host flags value */ +static void +brcms_c_mhfdef(struct brcms_c_info *wlc, u16 *mhfs, u16 mhf2_init) +{ + struct brcms_hardware *wlc_hw = wlc->hw; + + memset(mhfs, 0, MHFMAX * sizeof(u16)); + + mhfs[MHF2] |= mhf2_init; + + /* prohibit use of slowclock on multifunction boards */ + if (wlc_hw->boardflags & BFL_NOPLLDOWN) + mhfs[MHF1] |= MHF1_FORCEFASTCLK; + + if (BRCMS_ISNPHY(wlc_hw->band) && NREV_LT(wlc_hw->band->phyrev, 2)) { + mhfs[MHF2] |= MHF2_NPHY40MHZ_WAR; + mhfs[MHF1] |= MHF1_IQSWAP_WAR; + } +} + +static struct dma64regs __iomem * +dmareg(struct brcms_hardware *hw, uint direction, uint fifonum) +{ + if (direction == DMA_TX) + return &(hw->regs->fifo64regs[fifonum].dmaxmt); + return &(hw->regs->fifo64regs[fifonum].dmarcv); +} + +static bool brcms_b_attach_dmapio(struct brcms_c_info *wlc, uint j, bool wme) +{ + uint i; + char name[8]; + /* + * ucode host flag 2 needed for pio mode, independent of band and fifo + */ + u16 pio_mhf2 = 0; + struct brcms_hardware *wlc_hw = wlc->hw; + uint unit = wlc_hw->unit; + struct wiphy *wiphy = wlc->wiphy; + + /* name and offsets for dma_attach */ + snprintf(name, sizeof(name), "wl%d", unit); + + if (wlc_hw->di[0] == NULL) { /* Init FIFOs */ + int dma_attach_err = 0; + + /* + * FIFO 0 + * TX: TX_AC_BK_FIFO (TX AC Background data packets) + * RX: RX_FIFO (RX data packets) + */ + wlc_hw->di[0] = dma_attach(name, wlc_hw->sih, + (wme ? dmareg(wlc_hw, DMA_TX, 0) : + NULL), dmareg(wlc_hw, DMA_RX, 0), + (wme ? NTXD : 0), NRXD, + RXBUFSZ, -1, NRXBUFPOST, + BRCMS_HWRXOFF, &brcm_msg_level); + dma_attach_err |= (NULL == wlc_hw->di[0]); + + /* + * FIFO 1 + * TX: TX_AC_BE_FIFO (TX AC Best-Effort data packets) + * (legacy) TX_DATA_FIFO (TX data packets) + * RX: UNUSED + */ + wlc_hw->di[1] = dma_attach(name, wlc_hw->sih, + dmareg(wlc_hw, DMA_TX, 1), NULL, + NTXD, 0, 0, -1, 0, 0, + &brcm_msg_level); + dma_attach_err |= (NULL == wlc_hw->di[1]); + + /* + * FIFO 2 + * TX: TX_AC_VI_FIFO (TX AC Video data packets) + * RX: UNUSED + */ + wlc_hw->di[2] = dma_attach(name, wlc_hw->sih, + dmareg(wlc_hw, DMA_TX, 2), NULL, + NTXD, 0, 0, -1, 0, 0, + &brcm_msg_level); + dma_attach_err |= (NULL == wlc_hw->di[2]); + /* + * FIFO 3 + * TX: TX_AC_VO_FIFO (TX AC Voice data packets) + * (legacy) TX_CTL_FIFO (TX control & mgmt packets) + */ + wlc_hw->di[3] = dma_attach(name, wlc_hw->sih, + dmareg(wlc_hw, DMA_TX, 3), + NULL, NTXD, 0, 0, -1, + 0, 0, &brcm_msg_level); + dma_attach_err |= (NULL == wlc_hw->di[3]); +/* Cleaner to leave this as if with AP defined */ + + if (dma_attach_err) { + wiphy_err(wiphy, "wl%d: wlc_attach: dma_attach failed" + "\n", unit); + return false; + } + + /* get pointer to dma engine tx flow control variable */ + for (i = 0; i < NFIFO; i++) + if (wlc_hw->di[i]) + wlc_hw->txavail[i] = + (uint *) dma_getvar(wlc_hw->di[i], + "&txavail"); + } + + /* initial ucode host flags */ + brcms_c_mhfdef(wlc, wlc_hw->band->mhfs, pio_mhf2); + + return true; +} + +static void brcms_b_detach_dmapio(struct brcms_hardware *wlc_hw) +{ + uint j; + + for (j = 0; j < NFIFO; j++) { + if (wlc_hw->di[j]) { + dma_detach(wlc_hw->di[j]); + wlc_hw->di[j] = NULL; + } + } +} + +/* + * Initialize brcms_c_info default values ... + * may get overrides later in this function + * BMAC_NOTES, move low out and resolve the dangling ones + */ +static void brcms_b_info_init(struct brcms_hardware *wlc_hw) +{ + struct brcms_c_info *wlc = wlc_hw->wlc; + + /* set default sw macintmask value */ + wlc->defmacintmask = DEF_MACINTMASK; + + /* various 802.11g modes */ + wlc_hw->shortslot = false; + + wlc_hw->SFBL = RETRY_SHORT_FB; + wlc_hw->LFBL = RETRY_LONG_FB; + + /* default mac retry limits */ + wlc_hw->SRL = RETRY_SHORT_DEF; + wlc_hw->LRL = RETRY_LONG_DEF; + wlc_hw->chanspec = ch20mhz_chspec(1); +} + +static void brcms_b_wait_for_wake(struct brcms_hardware *wlc_hw) +{ + /* delay before first read of ucode state */ + udelay(40); + + /* wait until ucode is no longer asleep */ + SPINWAIT((brcms_b_read_shm(wlc_hw, M_UCODE_DBGST) == + DBGST_ASLEEP), wlc_hw->wlc->fastpwrup_dly); +} + +/* control chip clock to save power, enable dynamic clock or force fast clock */ +static void brcms_b_clkctl_clk(struct brcms_hardware *wlc_hw, uint mode) +{ + if (wlc_hw->sih->cccaps & CC_CAP_PMU) { + /* new chips with PMU, CCS_FORCEHT will distribute the HT clock + * on backplane, but mac core will still run on ALP(not HT) when + * it enters powersave mode, which means the FCA bit may not be + * set. Should wakeup mac if driver wants it to run on HT. + */ + + if (wlc_hw->clk) { + if (mode == CLK_FAST) { + OR_REG(&wlc_hw->regs->clk_ctl_st, + CCS_FORCEHT); + + udelay(64); + + SPINWAIT(((R_REG + (&wlc_hw->regs-> + clk_ctl_st) & CCS_HTAVAIL) == 0), + PMU_MAX_TRANSITION_DLY); + WARN_ON(!(R_REG + (&wlc_hw->regs-> + clk_ctl_st) & CCS_HTAVAIL)); + } else { + if ((wlc_hw->sih->pmurev == 0) && + (R_REG + (&wlc_hw->regs-> + clk_ctl_st) & (CCS_FORCEHT | CCS_HTAREQ))) + SPINWAIT(((R_REG + (&wlc_hw->regs-> + clk_ctl_st) & CCS_HTAVAIL) + == 0), + PMU_MAX_TRANSITION_DLY); + AND_REG(&wlc_hw->regs->clk_ctl_st, + ~CCS_FORCEHT); + } + } + wlc_hw->forcefastclk = (mode == CLK_FAST); + } else { + + /* old chips w/o PMU, force HT through cc, + * then use FCA to verify mac is running fast clock + */ + + wlc_hw->forcefastclk = ai_clkctl_cc(wlc_hw->sih, mode); + + /* check fast clock is available (if core is not in reset) */ + if (wlc_hw->forcefastclk && wlc_hw->clk) + WARN_ON(!(ai_core_sflags(wlc_hw->sih, 0, 0) & + SISF_FCLKA)); + + /* + * keep the ucode wake bit on if forcefastclk is on since we + * do not want ucode to put us back to slow clock when it dozes + * for PM mode. Code below matches the wake override bit with + * current forcefastclk state. Only setting bit in wake_override + * instead of waking ucode immediately since old code had this + * behavior. Older code set wlc->forcefastclk but only had the + * wake happen if the wakup_ucode work (protected by an up + * check) was executed just below. + */ + if (wlc_hw->forcefastclk) + mboolset(wlc_hw->wake_override, + BRCMS_WAKE_OVERRIDE_FORCEFAST); + else + mboolclr(wlc_hw->wake_override, + BRCMS_WAKE_OVERRIDE_FORCEFAST); + } +} + +/* set or clear ucode host flag bits + * it has an optimization for no-change write + * it only writes through shared memory when the core has clock; + * pre-CLK changes should use wlc_write_mhf to get around the optimization + * + * + * bands values are: BRCM_BAND_AUTO <--- Current band only + * BRCM_BAND_5G <--- 5G band only + * BRCM_BAND_2G <--- 2G band only + * BRCM_BAND_ALL <--- All bands + */ +void +brcms_b_mhf(struct brcms_hardware *wlc_hw, u8 idx, u16 mask, u16 val, + int bands) +{ + u16 save; + u16 addr[MHFMAX] = { + M_HOST_FLAGS1, M_HOST_FLAGS2, M_HOST_FLAGS3, M_HOST_FLAGS4, + M_HOST_FLAGS5 + }; + struct brcms_hw_band *band; + + if ((val & ~mask) || idx >= MHFMAX) + return; /* error condition */ + + switch (bands) { + /* Current band only or all bands, + * then set the band to current band + */ + case BRCM_BAND_AUTO: + case BRCM_BAND_ALL: + band = wlc_hw->band; + break; + case BRCM_BAND_5G: + band = wlc_hw->bandstate[BAND_5G_INDEX]; + break; + case BRCM_BAND_2G: + band = wlc_hw->bandstate[BAND_2G_INDEX]; + break; + default: + band = NULL; /* error condition */ + } + + if (band) { + save = band->mhfs[idx]; + band->mhfs[idx] = (band->mhfs[idx] & ~mask) | val; + + /* optimization: only write through if changed, and + * changed band is the current band + */ + if (wlc_hw->clk && (band->mhfs[idx] != save) + && (band == wlc_hw->band)) + brcms_b_write_shm(wlc_hw, addr[idx], + (u16) band->mhfs[idx]); + } + + if (bands == BRCM_BAND_ALL) { + wlc_hw->bandstate[0]->mhfs[idx] = + (wlc_hw->bandstate[0]->mhfs[idx] & ~mask) | val; + wlc_hw->bandstate[1]->mhfs[idx] = + (wlc_hw->bandstate[1]->mhfs[idx] & ~mask) | val; + } +} + +/* set the maccontrol register to desired reset state and + * initialize the sw cache of the register + */ +static void brcms_c_mctrl_reset(struct brcms_hardware *wlc_hw) +{ + /* IHR accesses are always enabled, PSM disabled, HPS off and WAKE on */ + wlc_hw->maccontrol = 0; + wlc_hw->suspended_fifos = 0; + wlc_hw->wake_override = 0; + wlc_hw->mute_override = 0; + brcms_b_mctrl(wlc_hw, ~0, MCTL_IHR_EN | MCTL_WAKE); +} + +/* + * write the software state of maccontrol and + * overrides to the maccontrol register + */ +static void brcms_c_mctrl_write(struct brcms_hardware *wlc_hw) +{ + u32 maccontrol = wlc_hw->maccontrol; + + /* OR in the wake bit if overridden */ + if (wlc_hw->wake_override) + maccontrol |= MCTL_WAKE; + + /* set AP and INFRA bits for mute if needed */ + if (wlc_hw->mute_override) { + maccontrol &= ~(MCTL_AP); + maccontrol |= MCTL_INFRA; + } + + W_REG(&wlc_hw->regs->maccontrol, maccontrol); +} + +/* set or clear maccontrol bits */ +void brcms_b_mctrl(struct brcms_hardware *wlc_hw, u32 mask, u32 val) +{ + u32 maccontrol; + u32 new_maccontrol; + + if (val & ~mask) + return; /* error condition */ + maccontrol = wlc_hw->maccontrol; + new_maccontrol = (maccontrol & ~mask) | val; + + /* if the new maccontrol value is the same as the old, nothing to do */ + if (new_maccontrol == maccontrol) + return; + + /* something changed, cache the new value */ + wlc_hw->maccontrol = new_maccontrol; + + /* write the new values with overrides applied */ + brcms_c_mctrl_write(wlc_hw); +} + +void brcms_c_ucode_wake_override_set(struct brcms_hardware *wlc_hw, + u32 override_bit) +{ + if (wlc_hw->wake_override || (wlc_hw->maccontrol & MCTL_WAKE)) { + mboolset(wlc_hw->wake_override, override_bit); + return; + } + + mboolset(wlc_hw->wake_override, override_bit); + + brcms_c_mctrl_write(wlc_hw); + brcms_b_wait_for_wake(wlc_hw); +} + +void brcms_c_ucode_wake_override_clear(struct brcms_hardware *wlc_hw, + u32 override_bit) +{ + mboolclr(wlc_hw->wake_override, override_bit); + + if (wlc_hw->wake_override || (wlc_hw->maccontrol & MCTL_WAKE)) + return; + + brcms_c_mctrl_write(wlc_hw); +} + +/* When driver needs ucode to stop beaconing, it has to make sure that + * MCTL_AP is clear and MCTL_INFRA is set + * Mode MCTL_AP MCTL_INFRA + * AP 1 1 + * STA 0 1 <--- This will ensure no beacons + * IBSS 0 0 + */ +static void brcms_c_ucode_mute_override_set(struct brcms_hardware *wlc_hw) +{ + wlc_hw->mute_override = 1; + + /* if maccontrol already has AP == 0 and INFRA == 1 without this + * override, then there is no change to write + */ + if ((wlc_hw->maccontrol & (MCTL_AP | MCTL_INFRA)) == MCTL_INFRA) + return; + + brcms_c_mctrl_write(wlc_hw); +} + +/* Clear the override on AP and INFRA bits */ +static void brcms_c_ucode_mute_override_clear(struct brcms_hardware *wlc_hw) +{ + if (wlc_hw->mute_override == 0) + return; + + wlc_hw->mute_override = 0; + + /* if maccontrol already has AP == 0 and INFRA == 1 without this + * override, then there is no change to write + */ + if ((wlc_hw->maccontrol & (MCTL_AP | MCTL_INFRA)) == MCTL_INFRA) + return; + + brcms_c_mctrl_write(wlc_hw); +} + +/* + * Write a MAC address to the given match reg offset in the RXE match engine. + */ +static void +brcms_b_set_addrmatch(struct brcms_hardware *wlc_hw, int match_reg_offset, + const u8 *addr) +{ + struct d11regs __iomem *regs; + u16 mac_l; + u16 mac_m; + u16 mac_h; + + BCMMSG(wlc_hw->wlc->wiphy, "wl%d: brcms_b_set_addrmatch\n", + wlc_hw->unit); + + regs = wlc_hw->regs; + mac_l = addr[0] | (addr[1] << 8); + mac_m = addr[2] | (addr[3] << 8); + mac_h = addr[4] | (addr[5] << 8); + + /* enter the MAC addr into the RXE match registers */ + W_REG(®s->rcm_ctl, RCM_INC_DATA | match_reg_offset); + W_REG(®s->rcm_mat_data, mac_l); + W_REG(®s->rcm_mat_data, mac_m); + W_REG(®s->rcm_mat_data, mac_h); + +} + +void +brcms_b_write_template_ram(struct brcms_hardware *wlc_hw, int offset, int len, + void *buf) +{ + struct d11regs __iomem *regs; + u32 word; + __le32 word_le; + __be32 word_be; + bool be_bit; + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + + regs = wlc_hw->regs; + W_REG(®s->tplatewrptr, offset); + + /* if MCTL_BIGEND bit set in mac control register, + * the chip swaps data in fifo, as well as data in + * template ram + */ + be_bit = (R_REG(®s->maccontrol) & MCTL_BIGEND) != 0; + + while (len > 0) { + memcpy(&word, buf, sizeof(u32)); + + if (be_bit) { + word_be = cpu_to_be32(word); + word = *(u32 *)&word_be; + } else { + word_le = cpu_to_le32(word); + word = *(u32 *)&word_le; + } + + W_REG(®s->tplatewrdata, word); + + buf = (u8 *) buf + sizeof(u32); + len -= sizeof(u32); + } +} + +static void brcms_b_set_cwmin(struct brcms_hardware *wlc_hw, u16 newmin) +{ + wlc_hw->band->CWmin = newmin; + + W_REG(&wlc_hw->regs->objaddr, OBJADDR_SCR_SEL | S_DOT11_CWMIN); + (void)R_REG(&wlc_hw->regs->objaddr); + W_REG(&wlc_hw->regs->objdata, newmin); +} + +static void brcms_b_set_cwmax(struct brcms_hardware *wlc_hw, u16 newmax) +{ + wlc_hw->band->CWmax = newmax; + + W_REG(&wlc_hw->regs->objaddr, OBJADDR_SCR_SEL | S_DOT11_CWMAX); + (void)R_REG(&wlc_hw->regs->objaddr); + W_REG(&wlc_hw->regs->objdata, newmax); +} + +void brcms_b_bw_set(struct brcms_hardware *wlc_hw, u16 bw) +{ + bool fastclk; + + /* request FAST clock if not on */ + fastclk = wlc_hw->forcefastclk; + if (!fastclk) + brcms_b_clkctl_clk(wlc_hw, CLK_FAST); + + wlc_phy_bw_state_set(wlc_hw->band->pi, bw); + + brcms_b_phy_reset(wlc_hw); + wlc_phy_init(wlc_hw->band->pi, wlc_phy_chanspec_get(wlc_hw->band->pi)); + + /* restore the clk */ + if (!fastclk) + brcms_b_clkctl_clk(wlc_hw, CLK_DYNAMIC); +} + +static void brcms_b_upd_synthpu(struct brcms_hardware *wlc_hw) +{ + u16 v; + struct brcms_c_info *wlc = wlc_hw->wlc; + /* update SYNTHPU_DLY */ + + if (BRCMS_ISLCNPHY(wlc->band)) + v = SYNTHPU_DLY_LPPHY_US; + else if (BRCMS_ISNPHY(wlc->band) && (NREV_GE(wlc->band->phyrev, 3))) + v = SYNTHPU_DLY_NPHY_US; + else + v = SYNTHPU_DLY_BPHY_US; + + brcms_b_write_shm(wlc_hw, M_SYNTHPU_DLY, v); +} + +static void brcms_c_ucode_txant_set(struct brcms_hardware *wlc_hw) +{ + u16 phyctl; + u16 phytxant = wlc_hw->bmac_phytxant; + u16 mask = PHY_TXC_ANT_MASK; + + /* set the Probe Response frame phy control word */ + phyctl = brcms_b_read_shm(wlc_hw, M_CTXPRS_BLK + C_CTX_PCTLWD_POS); + phyctl = (phyctl & ~mask) | phytxant; + brcms_b_write_shm(wlc_hw, M_CTXPRS_BLK + C_CTX_PCTLWD_POS, phyctl); + + /* set the Response (ACK/CTS) frame phy control word */ + phyctl = brcms_b_read_shm(wlc_hw, M_RSP_PCTLWD); + phyctl = (phyctl & ~mask) | phytxant; + brcms_b_write_shm(wlc_hw, M_RSP_PCTLWD, phyctl); +} + +static u16 brcms_b_ofdm_ratetable_offset(struct brcms_hardware *wlc_hw, + u8 rate) +{ + uint i; + u8 plcp_rate = 0; + struct plcp_signal_rate_lookup { + u8 rate; + u8 signal_rate; + }; + /* OFDM RATE sub-field of PLCP SIGNAL field, per 802.11 sec 17.3.4.1 */ + const struct plcp_signal_rate_lookup rate_lookup[] = { + {BRCM_RATE_6M, 0xB}, + {BRCM_RATE_9M, 0xF}, + {BRCM_RATE_12M, 0xA}, + {BRCM_RATE_18M, 0xE}, + {BRCM_RATE_24M, 0x9}, + {BRCM_RATE_36M, 0xD}, + {BRCM_RATE_48M, 0x8}, + {BRCM_RATE_54M, 0xC} + }; + + for (i = 0; i < ARRAY_SIZE(rate_lookup); i++) { + if (rate == rate_lookup[i].rate) { + plcp_rate = rate_lookup[i].signal_rate; + break; + } + } + + /* Find the SHM pointer to the rate table entry by looking in the + * Direct-map Table + */ + return 2 * brcms_b_read_shm(wlc_hw, M_RT_DIRMAP_A + (plcp_rate * 2)); +} + +static void brcms_upd_ofdm_pctl1_table(struct brcms_hardware *wlc_hw) +{ + u8 rate; + u8 rates[8] = { + BRCM_RATE_6M, BRCM_RATE_9M, BRCM_RATE_12M, BRCM_RATE_18M, + BRCM_RATE_24M, BRCM_RATE_36M, BRCM_RATE_48M, BRCM_RATE_54M + }; + u16 entry_ptr; + u16 pctl1; + uint i; + + if (!BRCMS_PHY_11N_CAP(wlc_hw->band)) + return; + + /* walk the phy rate table and update the entries */ + for (i = 0; i < ARRAY_SIZE(rates); i++) { + rate = rates[i]; + + entry_ptr = brcms_b_ofdm_ratetable_offset(wlc_hw, rate); + + /* read the SHM Rate Table entry OFDM PCTL1 values */ + pctl1 = + brcms_b_read_shm(wlc_hw, entry_ptr + M_RT_OFDM_PCTL1_POS); + + /* modify the value */ + pctl1 &= ~PHY_TXC1_MODE_MASK; + pctl1 |= (wlc_hw->hw_stf_ss_opmode << PHY_TXC1_MODE_SHIFT); + + /* Update the SHM Rate Table entry OFDM PCTL1 values */ + brcms_b_write_shm(wlc_hw, entry_ptr + M_RT_OFDM_PCTL1_POS, + pctl1); + } +} + +/* band-specific init */ +static void brcms_b_bsinit(struct brcms_c_info *wlc, u16 chanspec) +{ + struct brcms_hardware *wlc_hw = wlc->hw; + + BCMMSG(wlc->wiphy, "wl%d: bandunit %d\n", wlc_hw->unit, + wlc_hw->band->bandunit); + + brcms_c_ucode_bsinit(wlc_hw); + + wlc_phy_init(wlc_hw->band->pi, chanspec); + + brcms_c_ucode_txant_set(wlc_hw); + + /* + * cwmin is band-specific, update hardware + * with value for current band + */ + brcms_b_set_cwmin(wlc_hw, wlc_hw->band->CWmin); + brcms_b_set_cwmax(wlc_hw, wlc_hw->band->CWmax); + + brcms_b_update_slot_timing(wlc_hw, + wlc_hw->band->bandtype == BRCM_BAND_5G ? + true : wlc_hw->shortslot); + + /* write phytype and phyvers */ + brcms_b_write_shm(wlc_hw, M_PHYTYPE, (u16) wlc_hw->band->phytype); + brcms_b_write_shm(wlc_hw, M_PHYVER, (u16) wlc_hw->band->phyrev); + + /* + * initialize the txphyctl1 rate table since + * shmem is shared between bands + */ + brcms_upd_ofdm_pctl1_table(wlc_hw); + + brcms_b_upd_synthpu(wlc_hw); +} + +/* Perform a soft reset of the PHY PLL */ +void brcms_b_core_phypll_reset(struct brcms_hardware *wlc_hw) +{ + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + + ai_corereg(wlc_hw->sih, SI_CC_IDX, + offsetof(struct chipcregs, chipcontrol_addr), ~0, 0); + udelay(1); + ai_corereg(wlc_hw->sih, SI_CC_IDX, + offsetof(struct chipcregs, chipcontrol_data), 0x4, 0); + udelay(1); + ai_corereg(wlc_hw->sih, SI_CC_IDX, + offsetof(struct chipcregs, chipcontrol_data), 0x4, 4); + udelay(1); + ai_corereg(wlc_hw->sih, SI_CC_IDX, + offsetof(struct chipcregs, chipcontrol_data), 0x4, 0); + udelay(1); +} + +/* light way to turn on phy clock without reset for NPHY only + * refer to brcms_b_core_phy_clk for full version + */ +void brcms_b_phyclk_fgc(struct brcms_hardware *wlc_hw, bool clk) +{ + /* support(necessary for NPHY and HYPHY) only */ + if (!BRCMS_ISNPHY(wlc_hw->band)) + return; + + if (ON == clk) + ai_core_cflags(wlc_hw->sih, SICF_FGC, SICF_FGC); + else + ai_core_cflags(wlc_hw->sih, SICF_FGC, 0); + +} + +void brcms_b_macphyclk_set(struct brcms_hardware *wlc_hw, bool clk) +{ + if (ON == clk) + ai_core_cflags(wlc_hw->sih, SICF_MPCLKE, SICF_MPCLKE); + else + ai_core_cflags(wlc_hw->sih, SICF_MPCLKE, 0); +} + +void brcms_b_phy_reset(struct brcms_hardware *wlc_hw) +{ + struct brcms_phy_pub *pih = wlc_hw->band->pi; + u32 phy_bw_clkbits; + bool phy_in_reset = false; + + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + + if (pih == NULL) + return; + + phy_bw_clkbits = wlc_phy_clk_bwbits(wlc_hw->band->pi); + + /* Specific reset sequence required for NPHY rev 3 and 4 */ + if (BRCMS_ISNPHY(wlc_hw->band) && NREV_GE(wlc_hw->band->phyrev, 3) && + NREV_LE(wlc_hw->band->phyrev, 4)) { + /* Set the PHY bandwidth */ + ai_core_cflags(wlc_hw->sih, SICF_BWMASK, phy_bw_clkbits); + + udelay(1); + + /* Perform a soft reset of the PHY PLL */ + brcms_b_core_phypll_reset(wlc_hw); + + /* reset the PHY */ + ai_core_cflags(wlc_hw->sih, (SICF_PRST | SICF_PCLKE), + (SICF_PRST | SICF_PCLKE)); + phy_in_reset = true; + } else { + ai_core_cflags(wlc_hw->sih, + (SICF_PRST | SICF_PCLKE | SICF_BWMASK), + (SICF_PRST | SICF_PCLKE | phy_bw_clkbits)); + } + + udelay(2); + brcms_b_core_phy_clk(wlc_hw, ON); + + if (pih) + wlc_phy_anacore(pih, ON); +} + +/* switch to and initialize new band */ +static void brcms_b_setband(struct brcms_hardware *wlc_hw, uint bandunit, + u16 chanspec) { + struct brcms_c_info *wlc = wlc_hw->wlc; + u32 macintmask; + + /* Enable the d11 core before accessing it */ + if (!ai_iscoreup(wlc_hw->sih)) { + ai_core_reset(wlc_hw->sih, 0, 0); + brcms_c_mctrl_reset(wlc_hw); + } + + macintmask = brcms_c_setband_inact(wlc, bandunit); + + if (!wlc_hw->up) + return; + + brcms_b_core_phy_clk(wlc_hw, ON); + + /* band-specific initializations */ + brcms_b_bsinit(wlc, chanspec); + + /* + * If there are any pending software interrupt bits, + * then replace these with a harmless nonzero value + * so brcms_c_dpc() will re-enable interrupts when done. + */ + if (wlc->macintstatus) + wlc->macintstatus = MI_DMAINT; + + /* restore macintmask */ + brcms_intrsrestore(wlc->wl, macintmask); + + /* ucode should still be suspended.. */ + WARN_ON((R_REG(&wlc_hw->regs->maccontrol) & MCTL_EN_MAC) != 0); +} + +static bool brcms_c_isgoodchip(struct brcms_hardware *wlc_hw) +{ + + /* reject unsupported corerev */ + if (!CONF_HAS(D11CONF, wlc_hw->corerev)) { + wiphy_err(wlc_hw->wlc->wiphy, "unsupported core rev %d\n", + wlc_hw->corerev); + return false; + } + + return true; +} + +/* Validate some board info parameters */ +static bool brcms_c_validboardtype(struct brcms_hardware *wlc_hw) +{ + uint boardrev = wlc_hw->boardrev; + + /* 4 bits each for board type, major, minor, and tiny version */ + uint brt = (boardrev & 0xf000) >> 12; + uint b0 = (boardrev & 0xf00) >> 8; + uint b1 = (boardrev & 0xf0) >> 4; + uint b2 = boardrev & 0xf; + + /* voards from other vendors are always considered valid */ + if (wlc_hw->sih->boardvendor != PCI_VENDOR_ID_BROADCOM) + return true; + + /* do some boardrev sanity checks when boardvendor is Broadcom */ + if (boardrev == 0) + return false; + + if (boardrev <= 0xff) + return true; + + if ((brt > 2) || (brt == 0) || (b0 > 9) || (b0 == 0) || (b1 > 9) + || (b2 > 9)) + return false; + + return true; +} + +static char *brcms_c_get_macaddr(struct brcms_hardware *wlc_hw) +{ + enum brcms_srom_id var_id = BRCMS_SROM_MACADDR; + char *macaddr; + + /* If macaddr exists, use it (Sromrev4, CIS, ...). */ + macaddr = getvar(wlc_hw->sih, var_id); + if (macaddr != NULL) + return macaddr; + + if (wlc_hw->_nbands > 1) + var_id = BRCMS_SROM_ET1MACADDR; + else + var_id = BRCMS_SROM_IL0MACADDR; + + macaddr = getvar(wlc_hw->sih, var_id); + if (macaddr == NULL) + wiphy_err(wlc_hw->wlc->wiphy, "wl%d: wlc_get_macaddr: macaddr " + "getvar(%d) not found\n", wlc_hw->unit, var_id); + + return macaddr; +} + +/* power both the pll and external oscillator on/off */ +static void brcms_b_xtal(struct brcms_hardware *wlc_hw, bool want) +{ + BCMMSG(wlc_hw->wlc->wiphy, "wl%d: want %d\n", wlc_hw->unit, want); + + /* + * dont power down if plldown is false or + * we must poll hw radio disable + */ + if (!want && wlc_hw->pllreq) + return; + + if (wlc_hw->sih) + ai_clkctl_xtal(wlc_hw->sih, XTAL | PLL, want); + + wlc_hw->sbclk = want; + if (!wlc_hw->sbclk) { + wlc_hw->clk = false; + if (wlc_hw->band && wlc_hw->band->pi) + wlc_phy_hw_clk_state_upd(wlc_hw->band->pi, false); + } +} + +/* + * Return true if radio is disabled, otherwise false. + * hw radio disable signal is an external pin, users activate it asynchronously + * this function could be called when driver is down and w/o clock + * it operates on different registers depending on corerev and boardflag. + */ +static bool brcms_b_radio_read_hwdisabled(struct brcms_hardware *wlc_hw) +{ + bool v, clk, xtal; + u32 resetbits = 0, flags = 0; + + xtal = wlc_hw->sbclk; + if (!xtal) + brcms_b_xtal(wlc_hw, ON); + + /* may need to take core out of reset first */ + clk = wlc_hw->clk; + if (!clk) { + /* + * mac no longer enables phyclk automatically when driver + * accesses phyreg throughput mac. This can be skipped since + * only mac reg is accessed below + */ + flags |= SICF_PCLKE; + + /* + * AI chip doesn't restore bar0win2 on + * hibernation/resume, need sw fixup + */ + if ((wlc_hw->sih->chip == BCM43224_CHIP_ID) || + (wlc_hw->sih->chip == BCM43225_CHIP_ID)) + wlc_hw->regs = (struct d11regs __iomem *) + ai_setcore(wlc_hw->sih, D11_CORE_ID, 0); + ai_core_reset(wlc_hw->sih, flags, resetbits); + brcms_c_mctrl_reset(wlc_hw); + } + + v = ((R_REG(&wlc_hw->regs->phydebug) & PDBG_RFD) != 0); + + /* put core back into reset */ + if (!clk) + ai_core_disable(wlc_hw->sih, 0); + + if (!xtal) + brcms_b_xtal(wlc_hw, OFF); + + return v; +} + +static bool wlc_dma_rxreset(struct brcms_hardware *wlc_hw, uint fifo) +{ + struct dma_pub *di = wlc_hw->di[fifo]; + return dma_rxreset(di); +} + +/* d11 core reset + * ensure fask clock during reset + * reset dma + * reset d11(out of reset) + * reset phy(out of reset) + * clear software macintstatus for fresh new start + * one testing hack wlc_hw->noreset will bypass the d11/phy reset + */ +void brcms_b_corereset(struct brcms_hardware *wlc_hw, u32 flags) +{ + struct d11regs __iomem *regs; + uint i; + bool fastclk; + u32 resetbits = 0; + + if (flags == BRCMS_USE_COREFLAGS) + flags = (wlc_hw->band->pi ? wlc_hw->band->core_flags : 0); + + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + + regs = wlc_hw->regs; + + /* request FAST clock if not on */ + fastclk = wlc_hw->forcefastclk; + if (!fastclk) + brcms_b_clkctl_clk(wlc_hw, CLK_FAST); + + /* reset the dma engines except first time thru */ + if (ai_iscoreup(wlc_hw->sih)) { + for (i = 0; i < NFIFO; i++) + if ((wlc_hw->di[i]) && (!dma_txreset(wlc_hw->di[i]))) + wiphy_err(wlc_hw->wlc->wiphy, "wl%d: %s: " + "dma_txreset[%d]: cannot stop dma\n", + wlc_hw->unit, __func__, i); + + if ((wlc_hw->di[RX_FIFO]) + && (!wlc_dma_rxreset(wlc_hw, RX_FIFO))) + wiphy_err(wlc_hw->wlc->wiphy, "wl%d: %s: dma_rxreset" + "[%d]: cannot stop dma\n", + wlc_hw->unit, __func__, RX_FIFO); + } + /* if noreset, just stop the psm and return */ + if (wlc_hw->noreset) { + wlc_hw->wlc->macintstatus = 0; /* skip wl_dpc after down */ + brcms_b_mctrl(wlc_hw, MCTL_PSM_RUN | MCTL_EN_MAC, 0); + return; + } + + /* + * mac no longer enables phyclk automatically when driver accesses + * phyreg throughput mac, AND phy_reset is skipped at early stage when + * band->pi is invalid. need to enable PHY CLK + */ + flags |= SICF_PCLKE; + + /* + * reset the core + * In chips with PMU, the fastclk request goes through d11 core + * reg 0x1e0, which is cleared by the core_reset. have to re-request it. + * + * This adds some delay and we can optimize it by also requesting + * fastclk through chipcommon during this period if necessary. But + * that has to work coordinate with other driver like mips/arm since + * they may touch chipcommon as well. + */ + wlc_hw->clk = false; + ai_core_reset(wlc_hw->sih, flags, resetbits); + wlc_hw->clk = true; + if (wlc_hw->band && wlc_hw->band->pi) + wlc_phy_hw_clk_state_upd(wlc_hw->band->pi, true); + + brcms_c_mctrl_reset(wlc_hw); + + if (wlc_hw->sih->cccaps & CC_CAP_PMU) + brcms_b_clkctl_clk(wlc_hw, CLK_FAST); + + brcms_b_phy_reset(wlc_hw); + + /* turn on PHY_PLL */ + brcms_b_core_phypll_ctl(wlc_hw, true); + + /* clear sw intstatus */ + wlc_hw->wlc->macintstatus = 0; + + /* restore the clk setting */ + if (!fastclk) + brcms_b_clkctl_clk(wlc_hw, CLK_DYNAMIC); +} + +/* txfifo sizes needs to be modified(increased) since the newer cores + * have more memory. + */ +static void brcms_b_corerev_fifofixup(struct brcms_hardware *wlc_hw) +{ + struct d11regs __iomem *regs = wlc_hw->regs; + u16 fifo_nu; + u16 txfifo_startblk = TXFIFO_START_BLK, txfifo_endblk; + u16 txfifo_def, txfifo_def1; + u16 txfifo_cmd; + + /* tx fifos start at TXFIFO_START_BLK from the Base address */ + txfifo_startblk = TXFIFO_START_BLK; + + /* sequence of operations: reset fifo, set fifo size, reset fifo */ + for (fifo_nu = 0; fifo_nu < NFIFO; fifo_nu++) { + + txfifo_endblk = txfifo_startblk + wlc_hw->xmtfifo_sz[fifo_nu]; + txfifo_def = (txfifo_startblk & 0xff) | + (((txfifo_endblk - 1) & 0xff) << TXFIFO_FIFOTOP_SHIFT); + txfifo_def1 = ((txfifo_startblk >> 8) & 0x1) | + ((((txfifo_endblk - + 1) >> 8) & 0x1) << TXFIFO_FIFOTOP_SHIFT); + txfifo_cmd = + TXFIFOCMD_RESET_MASK | (fifo_nu << TXFIFOCMD_FIFOSEL_SHIFT); + + W_REG(®s->xmtfifocmd, txfifo_cmd); + W_REG(®s->xmtfifodef, txfifo_def); + W_REG(®s->xmtfifodef1, txfifo_def1); + + W_REG(®s->xmtfifocmd, txfifo_cmd); + + txfifo_startblk += wlc_hw->xmtfifo_sz[fifo_nu]; + } + /* + * need to propagate to shm location to be in sync since ucode/hw won't + * do this + */ + brcms_b_write_shm(wlc_hw, M_FIFOSIZE0, + wlc_hw->xmtfifo_sz[TX_AC_BE_FIFO]); + brcms_b_write_shm(wlc_hw, M_FIFOSIZE1, + wlc_hw->xmtfifo_sz[TX_AC_VI_FIFO]); + brcms_b_write_shm(wlc_hw, M_FIFOSIZE2, + ((wlc_hw->xmtfifo_sz[TX_AC_VO_FIFO] << 8) | wlc_hw-> + xmtfifo_sz[TX_AC_BK_FIFO])); + brcms_b_write_shm(wlc_hw, M_FIFOSIZE3, + ((wlc_hw->xmtfifo_sz[TX_ATIM_FIFO] << 8) | wlc_hw-> + xmtfifo_sz[TX_BCMC_FIFO])); +} + +/* This function is used for changing the tsf frac register + * If spur avoidance mode is off, the mac freq will be 80/120/160Mhz + * If spur avoidance mode is on1, the mac freq will be 82/123/164Mhz + * If spur avoidance mode is on2, the mac freq will be 84/126/168Mhz + * HTPHY Formula is 2^26/freq(MHz) e.g. + * For spuron2 - 126MHz -> 2^26/126 = 532610.0 + * - 532610 = 0x82082 => tsf_clk_frac_h = 0x8, tsf_clk_frac_l = 0x2082 + * For spuron: 123MHz -> 2^26/123 = 545600.5 + * - 545601 = 0x85341 => tsf_clk_frac_h = 0x8, tsf_clk_frac_l = 0x5341 + * For spur off: 120MHz -> 2^26/120 = 559240.5 + * - 559241 = 0x88889 => tsf_clk_frac_h = 0x8, tsf_clk_frac_l = 0x8889 + */ + +void brcms_b_switch_macfreq(struct brcms_hardware *wlc_hw, u8 spurmode) +{ + struct d11regs __iomem *regs = wlc_hw->regs; + + if ((wlc_hw->sih->chip == BCM43224_CHIP_ID) || + (wlc_hw->sih->chip == BCM43225_CHIP_ID)) { + if (spurmode == WL_SPURAVOID_ON2) { /* 126Mhz */ + W_REG(®s->tsf_clk_frac_l, 0x2082); + W_REG(®s->tsf_clk_frac_h, 0x8); + } else if (spurmode == WL_SPURAVOID_ON1) { /* 123Mhz */ + W_REG(®s->tsf_clk_frac_l, 0x5341); + W_REG(®s->tsf_clk_frac_h, 0x8); + } else { /* 120Mhz */ + W_REG(®s->tsf_clk_frac_l, 0x8889); + W_REG(®s->tsf_clk_frac_h, 0x8); + } + } else if (BRCMS_ISLCNPHY(wlc_hw->band)) { + if (spurmode == WL_SPURAVOID_ON1) { /* 82Mhz */ + W_REG(®s->tsf_clk_frac_l, 0x7CE0); + W_REG(®s->tsf_clk_frac_h, 0xC); + } else { /* 80Mhz */ + W_REG(®s->tsf_clk_frac_l, 0xCCCD); + W_REG(®s->tsf_clk_frac_h, 0xC); + } + } +} + +/* Initialize GPIOs that are controlled by D11 core */ +static void brcms_c_gpio_init(struct brcms_c_info *wlc) +{ + struct brcms_hardware *wlc_hw = wlc->hw; + struct d11regs __iomem *regs; + u32 gc, gm; + + regs = wlc_hw->regs; + + /* use GPIO select 0 to get all gpio signals from the gpio out reg */ + brcms_b_mctrl(wlc_hw, MCTL_GPOUT_SEL_MASK, 0); + + /* + * Common GPIO setup: + * G0 = LED 0 = WLAN Activity + * G1 = LED 1 = WLAN 2.4 GHz Radio State + * G2 = LED 2 = WLAN 5 GHz Radio State + * G4 = radio disable input (HI enabled, LO disabled) + */ + + gc = gm = 0; + + /* Allocate GPIOs for mimo antenna diversity feature */ + if (wlc_hw->antsel_type == ANTSEL_2x3) { + /* Enable antenna diversity, use 2x3 mode */ + brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_EN, + MHF3_ANTSEL_EN, BRCM_BAND_ALL); + brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_MODE, + MHF3_ANTSEL_MODE, BRCM_BAND_ALL); + + /* init superswitch control */ + wlc_phy_antsel_init(wlc_hw->band->pi, false); + + } else if (wlc_hw->antsel_type == ANTSEL_2x4) { + gm |= gc |= (BOARD_GPIO_12 | BOARD_GPIO_13); + /* + * The board itself is powered by these GPIOs + * (when not sending pattern) so set them high + */ + OR_REG(®s->psm_gpio_oe, + (BOARD_GPIO_12 | BOARD_GPIO_13)); + OR_REG(®s->psm_gpio_out, + (BOARD_GPIO_12 | BOARD_GPIO_13)); + + /* Enable antenna diversity, use 2x4 mode */ + brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_EN, + MHF3_ANTSEL_EN, BRCM_BAND_ALL); + brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_MODE, 0, + BRCM_BAND_ALL); + + /* Configure the desired clock to be 4Mhz */ + brcms_b_write_shm(wlc_hw, M_ANTSEL_CLKDIV, + ANTSEL_CLKDIV_4MHZ); + } + + /* + * gpio 9 controls the PA. ucode is responsible + * for wiggling out and oe + */ + if (wlc_hw->boardflags & BFL_PACTRL) + gm |= gc |= BOARD_GPIO_PACTRL; + + /* apply to gpiocontrol register */ + ai_gpiocontrol(wlc_hw->sih, gm, gc, GPIO_DRV_PRIORITY); +} + +static void brcms_ucode_write(struct brcms_hardware *wlc_hw, + const __le32 ucode[], const size_t nbytes) +{ + struct d11regs __iomem *regs = wlc_hw->regs; + uint i; + uint count; + + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + + count = (nbytes / sizeof(u32)); + + W_REG(®s->objaddr, (OBJADDR_AUTO_INC | OBJADDR_UCM_SEL)); + (void)R_REG(®s->objaddr); + for (i = 0; i < count; i++) + W_REG(®s->objdata, le32_to_cpu(ucode[i])); + +} + +static void brcms_ucode_download(struct brcms_hardware *wlc_hw) +{ + struct brcms_c_info *wlc; + struct brcms_ucode *ucode = &wlc_hw->wlc->wl->ucode; + + wlc = wlc_hw->wlc; + + if (wlc_hw->ucode_loaded) + return; + + if (D11REV_IS(wlc_hw->corerev, 23)) { + if (BRCMS_ISNPHY(wlc_hw->band)) { + brcms_ucode_write(wlc_hw, ucode->bcm43xx_16_mimo, + ucode->bcm43xx_16_mimosz); + wlc_hw->ucode_loaded = true; + } else + wiphy_err(wlc->wiphy, "%s: wl%d: unsupported phy in " + "corerev %d\n", + __func__, wlc_hw->unit, wlc_hw->corerev); + } else if (D11REV_IS(wlc_hw->corerev, 24)) { + if (BRCMS_ISLCNPHY(wlc_hw->band)) { + brcms_ucode_write(wlc_hw, ucode->bcm43xx_24_lcn, + ucode->bcm43xx_24_lcnsz); + wlc_hw->ucode_loaded = true; + } else { + wiphy_err(wlc->wiphy, "%s: wl%d: unsupported phy in " + "corerev %d\n", + __func__, wlc_hw->unit, wlc_hw->corerev); + } + } +} + +void brcms_b_txant_set(struct brcms_hardware *wlc_hw, u16 phytxant) +{ + /* update sw state */ + wlc_hw->bmac_phytxant = phytxant; + + /* push to ucode if up */ + if (!wlc_hw->up) + return; + brcms_c_ucode_txant_set(wlc_hw); + +} + +u16 brcms_b_get_txant(struct brcms_hardware *wlc_hw) +{ + return (u16) wlc_hw->wlc->stf->txant; +} + +void brcms_b_antsel_type_set(struct brcms_hardware *wlc_hw, u8 antsel_type) +{ + wlc_hw->antsel_type = antsel_type; + + /* Update the antsel type for phy module to use */ + wlc_phy_antsel_type_set(wlc_hw->band->pi, antsel_type); +} + +static void brcms_c_fatal_error(struct brcms_c_info *wlc) +{ + wiphy_err(wlc->wiphy, "wl%d: fatal error, reinitializing\n", + wlc->pub->unit); + brcms_init(wlc->wl); +} + +static void brcms_b_fifoerrors(struct brcms_hardware *wlc_hw) +{ + bool fatal = false; + uint unit; + uint intstatus, idx; + struct d11regs __iomem *regs = wlc_hw->regs; + struct wiphy *wiphy = wlc_hw->wlc->wiphy; + + unit = wlc_hw->unit; + + for (idx = 0; idx < NFIFO; idx++) { + /* read intstatus register and ignore any non-error bits */ + intstatus = + R_REG(®s->intctrlregs[idx].intstatus) & I_ERRORS; + if (!intstatus) + continue; + + BCMMSG(wlc_hw->wlc->wiphy, "wl%d: intstatus%d 0x%x\n", + unit, idx, intstatus); + + if (intstatus & I_RO) { + wiphy_err(wiphy, "wl%d: fifo %d: receive fifo " + "overflow\n", unit, idx); + fatal = true; + } + + if (intstatus & I_PC) { + wiphy_err(wiphy, "wl%d: fifo %d: descriptor error\n", + unit, idx); + fatal = true; + } + + if (intstatus & I_PD) { + wiphy_err(wiphy, "wl%d: fifo %d: data error\n", unit, + idx); + fatal = true; + } + + if (intstatus & I_DE) { + wiphy_err(wiphy, "wl%d: fifo %d: descriptor protocol " + "error\n", unit, idx); + fatal = true; + } + + if (intstatus & I_RU) + wiphy_err(wiphy, "wl%d: fifo %d: receive descriptor " + "underflow\n", idx, unit); + + if (intstatus & I_XU) { + wiphy_err(wiphy, "wl%d: fifo %d: transmit fifo " + "underflow\n", idx, unit); + fatal = true; + } + + if (fatal) { + brcms_c_fatal_error(wlc_hw->wlc); /* big hammer */ + break; + } else + W_REG(®s->intctrlregs[idx].intstatus, + intstatus); + } +} + +void brcms_c_intrson(struct brcms_c_info *wlc) +{ + struct brcms_hardware *wlc_hw = wlc->hw; + wlc->macintmask = wlc->defmacintmask; + W_REG(&wlc_hw->regs->macintmask, wlc->macintmask); +} + +/* + * callback for siutils.c, which has only wlc handler, no wl they both check + * up, not only because there is no need to off/restore d11 interrupt but also + * because per-port code may require sync with valid interrupt. + */ +static u32 brcms_c_wlintrsoff(struct brcms_c_info *wlc) +{ + if (!wlc->hw->up) + return 0; + + return brcms_intrsoff(wlc->wl); +} + +static void brcms_c_wlintrsrestore(struct brcms_c_info *wlc, u32 macintmask) +{ + if (!wlc->hw->up) + return; + + brcms_intrsrestore(wlc->wl, macintmask); +} + +u32 brcms_c_intrsoff(struct brcms_c_info *wlc) +{ + struct brcms_hardware *wlc_hw = wlc->hw; + u32 macintmask; + + if (!wlc_hw->clk) + return 0; + + macintmask = wlc->macintmask; /* isr can still happen */ + + W_REG(&wlc_hw->regs->macintmask, 0); + (void)R_REG(&wlc_hw->regs->macintmask); /* sync readback */ + udelay(1); /* ensure int line is no longer driven */ + wlc->macintmask = 0; + + /* return previous macintmask; resolve race between us and our isr */ + return wlc->macintstatus ? 0 : macintmask; +} + +void brcms_c_intrsrestore(struct brcms_c_info *wlc, u32 macintmask) +{ + struct brcms_hardware *wlc_hw = wlc->hw; + if (!wlc_hw->clk) + return; + + wlc->macintmask = macintmask; + W_REG(&wlc_hw->regs->macintmask, wlc->macintmask); +} + +static void brcms_b_tx_fifo_suspend(struct brcms_hardware *wlc_hw, + uint tx_fifo) +{ + u8 fifo = 1 << tx_fifo; + + /* Two clients of this code, 11h Quiet period and scanning. */ + + /* only suspend if not already suspended */ + if ((wlc_hw->suspended_fifos & fifo) == fifo) + return; + + /* force the core awake only if not already */ + if (wlc_hw->suspended_fifos == 0) + brcms_c_ucode_wake_override_set(wlc_hw, + BRCMS_WAKE_OVERRIDE_TXFIFO); + + wlc_hw->suspended_fifos |= fifo; + + if (wlc_hw->di[tx_fifo]) { + /* + * Suspending AMPDU transmissions in the middle can cause + * underflow which may result in mismatch between ucode and + * driver so suspend the mac before suspending the FIFO + */ + if (BRCMS_PHY_11N_CAP(wlc_hw->band)) + brcms_c_suspend_mac_and_wait(wlc_hw->wlc); + + dma_txsuspend(wlc_hw->di[tx_fifo]); + + if (BRCMS_PHY_11N_CAP(wlc_hw->band)) + brcms_c_enable_mac(wlc_hw->wlc); + } +} + +static void brcms_b_tx_fifo_resume(struct brcms_hardware *wlc_hw, + uint tx_fifo) +{ + /* BMAC_NOTE: BRCMS_TX_FIFO_ENAB is done in brcms_c_dpc() for DMA case + * but need to be done here for PIO otherwise the watchdog will catch + * the inconsistency and fire + */ + /* Two clients of this code, 11h Quiet period and scanning. */ + if (wlc_hw->di[tx_fifo]) + dma_txresume(wlc_hw->di[tx_fifo]); + + /* allow core to sleep again */ + if (wlc_hw->suspended_fifos == 0) + return; + else { + wlc_hw->suspended_fifos &= ~(1 << tx_fifo); + if (wlc_hw->suspended_fifos == 0) + brcms_c_ucode_wake_override_clear(wlc_hw, + BRCMS_WAKE_OVERRIDE_TXFIFO); + } +} + +static void brcms_b_mute(struct brcms_hardware *wlc_hw, bool on, u32 flags) +{ + static const u8 null_ether_addr[ETH_ALEN] = {0, 0, 0, 0, 0, 0}; + + if (on) { + /* suspend tx fifos */ + brcms_b_tx_fifo_suspend(wlc_hw, TX_DATA_FIFO); + brcms_b_tx_fifo_suspend(wlc_hw, TX_CTL_FIFO); + brcms_b_tx_fifo_suspend(wlc_hw, TX_AC_BK_FIFO); + brcms_b_tx_fifo_suspend(wlc_hw, TX_AC_VI_FIFO); + + /* zero the address match register so we do not send ACKs */ + brcms_b_set_addrmatch(wlc_hw, RCM_MAC_OFFSET, + null_ether_addr); + } else { + /* resume tx fifos */ + brcms_b_tx_fifo_resume(wlc_hw, TX_DATA_FIFO); + brcms_b_tx_fifo_resume(wlc_hw, TX_CTL_FIFO); + brcms_b_tx_fifo_resume(wlc_hw, TX_AC_BK_FIFO); + brcms_b_tx_fifo_resume(wlc_hw, TX_AC_VI_FIFO); + + /* Restore address */ + brcms_b_set_addrmatch(wlc_hw, RCM_MAC_OFFSET, + wlc_hw->etheraddr); + } + + wlc_phy_mute_upd(wlc_hw->band->pi, on, flags); + + if (on) + brcms_c_ucode_mute_override_set(wlc_hw); + else + brcms_c_ucode_mute_override_clear(wlc_hw); +} + +/* + * Read and clear macintmask and macintstatus and intstatus registers. + * This routine should be called with interrupts off + * Return: + * -1 if brcms_deviceremoved(wlc) evaluates to true; + * 0 if the interrupt is not for us, or we are in some special cases; + * device interrupt status bits otherwise. + */ +static inline u32 wlc_intstatus(struct brcms_c_info *wlc, bool in_isr) +{ + struct brcms_hardware *wlc_hw = wlc->hw; + struct d11regs __iomem *regs = wlc_hw->regs; + u32 macintstatus; + + /* macintstatus includes a DMA interrupt summary bit */ + macintstatus = R_REG(®s->macintstatus); + + BCMMSG(wlc->wiphy, "wl%d: macintstatus: 0x%x\n", wlc_hw->unit, + macintstatus); + + /* detect cardbus removed, in power down(suspend) and in reset */ + if (brcms_deviceremoved(wlc)) + return -1; + + /* brcms_deviceremoved() succeeds even when the core is still resetting, + * handle that case here. + */ + if (macintstatus == 0xffffffff) + return 0; + + /* defer unsolicited interrupts */ + macintstatus &= (in_isr ? wlc->macintmask : wlc->defmacintmask); + + /* if not for us */ + if (macintstatus == 0) + return 0; + + /* interrupts are already turned off for CFE build + * Caution: For CFE Turning off the interrupts again has some undesired + * consequences + */ + /* turn off the interrupts */ + W_REG(®s->macintmask, 0); + (void)R_REG(®s->macintmask); /* sync readback */ + wlc->macintmask = 0; + + /* clear device interrupts */ + W_REG(®s->macintstatus, macintstatus); + + /* MI_DMAINT is indication of non-zero intstatus */ + if (macintstatus & MI_DMAINT) + /* + * only fifo interrupt enabled is I_RI in + * RX_FIFO. If MI_DMAINT is set, assume it + * is set and clear the interrupt. + */ + W_REG(®s->intctrlregs[RX_FIFO].intstatus, + DEF_RXINTMASK); + + return macintstatus; +} + +/* Update wlc->macintstatus and wlc->intstatus[]. */ +/* Return true if they are updated successfully. false otherwise */ +bool brcms_c_intrsupd(struct brcms_c_info *wlc) +{ + u32 macintstatus; + + /* read and clear macintstatus and intstatus registers */ + macintstatus = wlc_intstatus(wlc, false); + + /* device is removed */ + if (macintstatus == 0xffffffff) + return false; + + /* update interrupt status in software */ + wlc->macintstatus |= macintstatus; + + return true; +} + +/* + * First-level interrupt processing. + * Return true if this was our interrupt, false otherwise. + * *wantdpc will be set to true if further brcms_c_dpc() processing is required, + * false otherwise. + */ +bool brcms_c_isr(struct brcms_c_info *wlc, bool *wantdpc) +{ + struct brcms_hardware *wlc_hw = wlc->hw; + u32 macintstatus; + + *wantdpc = false; + + if (!wlc_hw->up || !wlc->macintmask) + return false; + + /* read and clear macintstatus and intstatus registers */ + macintstatus = wlc_intstatus(wlc, true); + + if (macintstatus == 0xffffffff) + wiphy_err(wlc->wiphy, "DEVICEREMOVED detected in the ISR code" + " path\n"); + + /* it is not for us */ + if (macintstatus == 0) + return false; + + *wantdpc = true; + + /* save interrupt status bits */ + wlc->macintstatus = macintstatus; + + return true; + +} + +void brcms_c_suspend_mac_and_wait(struct brcms_c_info *wlc) +{ + struct brcms_hardware *wlc_hw = wlc->hw; + struct d11regs __iomem *regs = wlc_hw->regs; + u32 mc, mi; + struct wiphy *wiphy = wlc->wiphy; + + BCMMSG(wlc->wiphy, "wl%d: bandunit %d\n", wlc_hw->unit, + wlc_hw->band->bandunit); + + /* + * Track overlapping suspend requests + */ + wlc_hw->mac_suspend_depth++; + if (wlc_hw->mac_suspend_depth > 1) + return; + + /* force the core awake */ + brcms_c_ucode_wake_override_set(wlc_hw, BRCMS_WAKE_OVERRIDE_MACSUSPEND); + + mc = R_REG(®s->maccontrol); + + if (mc == 0xffffffff) { + wiphy_err(wiphy, "wl%d: %s: dead chip\n", wlc_hw->unit, + __func__); + brcms_down(wlc->wl); + return; + } + WARN_ON(mc & MCTL_PSM_JMP_0); + WARN_ON(!(mc & MCTL_PSM_RUN)); + WARN_ON(!(mc & MCTL_EN_MAC)); + + mi = R_REG(®s->macintstatus); + if (mi == 0xffffffff) { + wiphy_err(wiphy, "wl%d: %s: dead chip\n", wlc_hw->unit, + __func__); + brcms_down(wlc->wl); + return; + } + WARN_ON(mi & MI_MACSSPNDD); + + brcms_b_mctrl(wlc_hw, MCTL_EN_MAC, 0); + + SPINWAIT(!(R_REG(®s->macintstatus) & MI_MACSSPNDD), + BRCMS_MAX_MAC_SUSPEND); + + if (!(R_REG(®s->macintstatus) & MI_MACSSPNDD)) { + wiphy_err(wiphy, "wl%d: wlc_suspend_mac_and_wait: waited %d uS" + " and MI_MACSSPNDD is still not on.\n", + wlc_hw->unit, BRCMS_MAX_MAC_SUSPEND); + wiphy_err(wiphy, "wl%d: psmdebug 0x%08x, phydebug 0x%08x, " + "psm_brc 0x%04x\n", wlc_hw->unit, + R_REG(®s->psmdebug), + R_REG(®s->phydebug), + R_REG(®s->psm_brc)); + } + + mc = R_REG(®s->maccontrol); + if (mc == 0xffffffff) { + wiphy_err(wiphy, "wl%d: %s: dead chip\n", wlc_hw->unit, + __func__); + brcms_down(wlc->wl); + return; + } + WARN_ON(mc & MCTL_PSM_JMP_0); + WARN_ON(!(mc & MCTL_PSM_RUN)); + WARN_ON(mc & MCTL_EN_MAC); +} + +void brcms_c_enable_mac(struct brcms_c_info *wlc) +{ + struct brcms_hardware *wlc_hw = wlc->hw; + struct d11regs __iomem *regs = wlc_hw->regs; + u32 mc, mi; + + BCMMSG(wlc->wiphy, "wl%d: bandunit %d\n", wlc_hw->unit, + wlc->band->bandunit); + + /* + * Track overlapping suspend requests + */ + wlc_hw->mac_suspend_depth--; + if (wlc_hw->mac_suspend_depth > 0) + return; + + mc = R_REG(®s->maccontrol); + WARN_ON(mc & MCTL_PSM_JMP_0); + WARN_ON(mc & MCTL_EN_MAC); + WARN_ON(!(mc & MCTL_PSM_RUN)); + + brcms_b_mctrl(wlc_hw, MCTL_EN_MAC, MCTL_EN_MAC); + W_REG(®s->macintstatus, MI_MACSSPNDD); + + mc = R_REG(®s->maccontrol); + WARN_ON(mc & MCTL_PSM_JMP_0); + WARN_ON(!(mc & MCTL_EN_MAC)); + WARN_ON(!(mc & MCTL_PSM_RUN)); + + mi = R_REG(®s->macintstatus); + WARN_ON(mi & MI_MACSSPNDD); + + brcms_c_ucode_wake_override_clear(wlc_hw, + BRCMS_WAKE_OVERRIDE_MACSUSPEND); +} + +void brcms_b_band_stf_ss_set(struct brcms_hardware *wlc_hw, u8 stf_mode) +{ + wlc_hw->hw_stf_ss_opmode = stf_mode; + + if (wlc_hw->clk) + brcms_upd_ofdm_pctl1_table(wlc_hw); +} + +static bool brcms_b_validate_chip_access(struct brcms_hardware *wlc_hw) +{ + struct d11regs __iomem *regs; + u32 w, val; + struct wiphy *wiphy = wlc_hw->wlc->wiphy; + + BCMMSG(wiphy, "wl%d\n", wlc_hw->unit); + + regs = wlc_hw->regs; + + /* Validate dchip register access */ + + W_REG(®s->objaddr, OBJADDR_SHM_SEL | 0); + (void)R_REG(®s->objaddr); + w = R_REG(®s->objdata); + + /* Can we write and read back a 32bit register? */ + W_REG(®s->objaddr, OBJADDR_SHM_SEL | 0); + (void)R_REG(®s->objaddr); + W_REG(®s->objdata, (u32) 0xaa5555aa); + + W_REG(®s->objaddr, OBJADDR_SHM_SEL | 0); + (void)R_REG(®s->objaddr); + val = R_REG(®s->objdata); + if (val != (u32) 0xaa5555aa) { + wiphy_err(wiphy, "wl%d: validate_chip_access: SHM = 0x%x, " + "expected 0xaa5555aa\n", wlc_hw->unit, val); + return false; + } + + W_REG(®s->objaddr, OBJADDR_SHM_SEL | 0); + (void)R_REG(®s->objaddr); + W_REG(®s->objdata, (u32) 0x55aaaa55); + + W_REG(®s->objaddr, OBJADDR_SHM_SEL | 0); + (void)R_REG(®s->objaddr); + val = R_REG(®s->objdata); + if (val != (u32) 0x55aaaa55) { + wiphy_err(wiphy, "wl%d: validate_chip_access: SHM = 0x%x, " + "expected 0x55aaaa55\n", wlc_hw->unit, val); + return false; + } + + W_REG(®s->objaddr, OBJADDR_SHM_SEL | 0); + (void)R_REG(®s->objaddr); + W_REG(®s->objdata, w); + + /* clear CFPStart */ + W_REG(®s->tsf_cfpstart, 0); + + w = R_REG(®s->maccontrol); + if ((w != (MCTL_IHR_EN | MCTL_WAKE)) && + (w != (MCTL_IHR_EN | MCTL_GMODE | MCTL_WAKE))) { + wiphy_err(wiphy, "wl%d: validate_chip_access: maccontrol = " + "0x%x, expected 0x%x or 0x%x\n", wlc_hw->unit, w, + (MCTL_IHR_EN | MCTL_WAKE), + (MCTL_IHR_EN | MCTL_GMODE | MCTL_WAKE)); + return false; + } + + return true; +} + +#define PHYPLL_WAIT_US 100000 + +void brcms_b_core_phypll_ctl(struct brcms_hardware *wlc_hw, bool on) +{ + struct d11regs __iomem *regs; + u32 tmp; + + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + + tmp = 0; + regs = wlc_hw->regs; + + if (on) { + if ((wlc_hw->sih->chip == BCM4313_CHIP_ID)) { + OR_REG(®s->clk_ctl_st, + (CCS_ERSRC_REQ_HT | CCS_ERSRC_REQ_D11PLL | + CCS_ERSRC_REQ_PHYPLL)); + SPINWAIT((R_REG(®s->clk_ctl_st) & + (CCS_ERSRC_AVAIL_HT)) != (CCS_ERSRC_AVAIL_HT), + PHYPLL_WAIT_US); + + tmp = R_REG(®s->clk_ctl_st); + if ((tmp & (CCS_ERSRC_AVAIL_HT)) != + (CCS_ERSRC_AVAIL_HT)) + wiphy_err(wlc_hw->wlc->wiphy, "%s: turn on PHY" + " PLL failed\n", __func__); + } else { + OR_REG(®s->clk_ctl_st, + (CCS_ERSRC_REQ_D11PLL | CCS_ERSRC_REQ_PHYPLL)); + SPINWAIT((R_REG(®s->clk_ctl_st) & + (CCS_ERSRC_AVAIL_D11PLL | + CCS_ERSRC_AVAIL_PHYPLL)) != + (CCS_ERSRC_AVAIL_D11PLL | + CCS_ERSRC_AVAIL_PHYPLL), PHYPLL_WAIT_US); + + tmp = R_REG(®s->clk_ctl_st); + if ((tmp & + (CCS_ERSRC_AVAIL_D11PLL | CCS_ERSRC_AVAIL_PHYPLL)) + != + (CCS_ERSRC_AVAIL_D11PLL | CCS_ERSRC_AVAIL_PHYPLL)) + wiphy_err(wlc_hw->wlc->wiphy, "%s: turn on " + "PHY PLL failed\n", __func__); + } + } else { + /* + * Since the PLL may be shared, other cores can still + * be requesting it; so we'll deassert the request but + * not wait for status to comply. + */ + AND_REG(®s->clk_ctl_st, ~CCS_ERSRC_REQ_PHYPLL); + tmp = R_REG(®s->clk_ctl_st); + } +} + +static void brcms_c_coredisable(struct brcms_hardware *wlc_hw) +{ + bool dev_gone; + + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + + dev_gone = brcms_deviceremoved(wlc_hw->wlc); + + if (dev_gone) + return; + + if (wlc_hw->noreset) + return; + + /* radio off */ + wlc_phy_switch_radio(wlc_hw->band->pi, OFF); + + /* turn off analog core */ + wlc_phy_anacore(wlc_hw->band->pi, OFF); + + /* turn off PHYPLL to save power */ + brcms_b_core_phypll_ctl(wlc_hw, false); + + wlc_hw->clk = false; + ai_core_disable(wlc_hw->sih, 0); + wlc_phy_hw_clk_state_upd(wlc_hw->band->pi, false); +} + +static void brcms_c_flushqueues(struct brcms_c_info *wlc) +{ + struct brcms_hardware *wlc_hw = wlc->hw; + uint i; + + /* free any posted tx packets */ + for (i = 0; i < NFIFO; i++) + if (wlc_hw->di[i]) { + dma_txreclaim(wlc_hw->di[i], DMA_RANGE_ALL); + wlc->core->txpktpend[i] = 0; + BCMMSG(wlc->wiphy, "pktpend fifo %d clrd\n", i); + } + + /* free any posted rx packets */ + dma_rxreclaim(wlc_hw->di[RX_FIFO]); +} + +static u16 +brcms_b_read_objmem(struct brcms_hardware *wlc_hw, uint offset, u32 sel) +{ + struct d11regs __iomem *regs = wlc_hw->regs; + u16 __iomem *objdata_lo = (u16 __iomem *)®s->objdata; + u16 __iomem *objdata_hi = objdata_lo + 1; + u16 v; + + W_REG(®s->objaddr, sel | (offset >> 2)); + (void)R_REG(®s->objaddr); + if (offset & 2) + v = R_REG(objdata_hi); + else + v = R_REG(objdata_lo); + + return v; +} + +static void +brcms_b_write_objmem(struct brcms_hardware *wlc_hw, uint offset, u16 v, + u32 sel) +{ + struct d11regs __iomem *regs = wlc_hw->regs; + u16 __iomem *objdata_lo = (u16 __iomem *)®s->objdata; + u16 __iomem *objdata_hi = objdata_lo + 1; + + W_REG(®s->objaddr, sel | (offset >> 2)); + (void)R_REG(®s->objaddr); + if (offset & 2) + W_REG(objdata_hi, v); + else + W_REG(objdata_lo, v); +} + +/* + * Read a single u16 from shared memory. + * SHM 'offset' needs to be an even address + */ +u16 brcms_b_read_shm(struct brcms_hardware *wlc_hw, uint offset) +{ + return brcms_b_read_objmem(wlc_hw, offset, OBJADDR_SHM_SEL); +} + +/* + * Write a single u16 to shared memory. + * SHM 'offset' needs to be an even address + */ +void brcms_b_write_shm(struct brcms_hardware *wlc_hw, uint offset, u16 v) +{ + brcms_b_write_objmem(wlc_hw, offset, v, OBJADDR_SHM_SEL); +} + +/* + * Copy a buffer to shared memory of specified type . + * SHM 'offset' needs to be an even address and + * Buffer length 'len' must be an even number of bytes + * 'sel' selects the type of memory + */ +void +brcms_b_copyto_objmem(struct brcms_hardware *wlc_hw, uint offset, + const void *buf, int len, u32 sel) +{ + u16 v; + const u8 *p = (const u8 *)buf; + int i; + + if (len <= 0 || (offset & 1) || (len & 1)) + return; + + for (i = 0; i < len; i += 2) { + v = p[i] | (p[i + 1] << 8); + brcms_b_write_objmem(wlc_hw, offset + i, v, sel); + } +} + +/* + * Copy a piece of shared memory of specified type to a buffer . + * SHM 'offset' needs to be an even address and + * Buffer length 'len' must be an even number of bytes + * 'sel' selects the type of memory + */ +void +brcms_b_copyfrom_objmem(struct brcms_hardware *wlc_hw, uint offset, void *buf, + int len, u32 sel) +{ + u16 v; + u8 *p = (u8 *) buf; + int i; + + if (len <= 0 || (offset & 1) || (len & 1)) + return; + + for (i = 0; i < len; i += 2) { + v = brcms_b_read_objmem(wlc_hw, offset + i, sel); + p[i] = v & 0xFF; + p[i + 1] = (v >> 8) & 0xFF; + } +} + +/* Copy a buffer to shared memory. + * SHM 'offset' needs to be an even address and + * Buffer length 'len' must be an even number of bytes + */ +static void brcms_c_copyto_shm(struct brcms_c_info *wlc, uint offset, + const void *buf, int len) +{ + brcms_b_copyto_objmem(wlc->hw, offset, buf, len, OBJADDR_SHM_SEL); +} + +static void brcms_b_retrylimit_upd(struct brcms_hardware *wlc_hw, + u16 SRL, u16 LRL) +{ + wlc_hw->SRL = SRL; + wlc_hw->LRL = LRL; + + /* write retry limit to SCR, shouldn't need to suspend */ + if (wlc_hw->up) { + W_REG(&wlc_hw->regs->objaddr, + OBJADDR_SCR_SEL | S_DOT11_SRC_LMT); + (void)R_REG(&wlc_hw->regs->objaddr); + W_REG(&wlc_hw->regs->objdata, wlc_hw->SRL); + W_REG(&wlc_hw->regs->objaddr, + OBJADDR_SCR_SEL | S_DOT11_LRC_LMT); + (void)R_REG(&wlc_hw->regs->objaddr); + W_REG(&wlc_hw->regs->objdata, wlc_hw->LRL); + } +} + +static void brcms_b_pllreq(struct brcms_hardware *wlc_hw, bool set, u32 req_bit) +{ + if (set) { + if (mboolisset(wlc_hw->pllreq, req_bit)) + return; + + mboolset(wlc_hw->pllreq, req_bit); + + if (mboolisset(wlc_hw->pllreq, BRCMS_PLLREQ_FLIP)) { + if (!wlc_hw->sbclk) + brcms_b_xtal(wlc_hw, ON); + } + } else { + if (!mboolisset(wlc_hw->pllreq, req_bit)) + return; + + mboolclr(wlc_hw->pllreq, req_bit); + + if (mboolisset(wlc_hw->pllreq, BRCMS_PLLREQ_FLIP)) { + if (wlc_hw->sbclk) + brcms_b_xtal(wlc_hw, OFF); + } + } +} + +static void brcms_b_antsel_set(struct brcms_hardware *wlc_hw, u32 antsel_avail) +{ + wlc_hw->antsel_avail = antsel_avail; +} + +/* + * conditions under which the PM bit should be set in outgoing frames + * and STAY_AWAKE is meaningful + */ +static bool brcms_c_ps_allowed(struct brcms_c_info *wlc) +{ + struct brcms_bss_cfg *cfg = wlc->bsscfg; + + /* disallow PS when one of the following global conditions meets */ + if (!wlc->pub->associated) + return false; + + /* disallow PS when one of these meets when not scanning */ + if (wlc->monitor) + return false; + + if (cfg->associated) { + /* + * disallow PS when one of the following + * bsscfg specific conditions meets + */ + if (!cfg->BSS) + return false; + + return false; + } + + return true; +} + +static void brcms_c_statsupd(struct brcms_c_info *wlc) +{ + int i; + struct macstat macstats; +#ifdef BCMDBG + u16 delta; + u16 rxf0ovfl; + u16 txfunfl[NFIFO]; +#endif /* BCMDBG */ + + /* if driver down, make no sense to update stats */ + if (!wlc->pub->up) + return; + +#ifdef BCMDBG + /* save last rx fifo 0 overflow count */ + rxf0ovfl = wlc->core->macstat_snapshot->rxf0ovfl; + + /* save last tx fifo underflow count */ + for (i = 0; i < NFIFO; i++) + txfunfl[i] = wlc->core->macstat_snapshot->txfunfl[i]; +#endif /* BCMDBG */ + + /* Read mac stats from contiguous shared memory */ + brcms_b_copyfrom_objmem(wlc->hw, M_UCODE_MACSTAT, &macstats, + sizeof(struct macstat), OBJADDR_SHM_SEL); + +#ifdef BCMDBG + /* check for rx fifo 0 overflow */ + delta = (u16) (wlc->core->macstat_snapshot->rxf0ovfl - rxf0ovfl); + if (delta) + wiphy_err(wlc->wiphy, "wl%d: %u rx fifo 0 overflows!\n", + wlc->pub->unit, delta); + + /* check for tx fifo underflows */ + for (i = 0; i < NFIFO; i++) { + delta = + (u16) (wlc->core->macstat_snapshot->txfunfl[i] - + txfunfl[i]); + if (delta) + wiphy_err(wlc->wiphy, "wl%d: %u tx fifo %d underflows!" + "\n", wlc->pub->unit, delta, i); + } +#endif /* BCMDBG */ + + /* merge counters from dma module */ + for (i = 0; i < NFIFO; i++) { + if (wlc->hw->di[i]) + dma_counterreset(wlc->hw->di[i]); + } +} + +static void brcms_b_reset(struct brcms_hardware *wlc_hw) +{ + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + + /* reset the core */ + if (!brcms_deviceremoved(wlc_hw->wlc)) + brcms_b_corereset(wlc_hw, BRCMS_USE_COREFLAGS); + + /* purge the dma rings */ + brcms_c_flushqueues(wlc_hw->wlc); +} + +void brcms_c_reset(struct brcms_c_info *wlc) +{ + BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); + + /* slurp up hw mac counters before core reset */ + brcms_c_statsupd(wlc); + + /* reset our snapshot of macstat counters */ + memset((char *)wlc->core->macstat_snapshot, 0, + sizeof(struct macstat)); + + brcms_b_reset(wlc->hw); +} + +/* Return the channel the driver should initialize during brcms_c_init. + * the channel may have to be changed from the currently configured channel + * if other configurations are in conflict (bandlocked, 11n mode disabled, + * invalid channel for current country, etc.) + */ +static u16 brcms_c_init_chanspec(struct brcms_c_info *wlc) +{ + u16 chanspec = + 1 | WL_CHANSPEC_BW_20 | WL_CHANSPEC_CTL_SB_NONE | + WL_CHANSPEC_BAND_2G; + + return chanspec; +} + +void brcms_c_init_scb(struct scb *scb) +{ + int i; + + memset(scb, 0, sizeof(struct scb)); + scb->flags = SCB_WMECAP | SCB_HTCAP; + for (i = 0; i < NUMPRIO; i++) { + scb->seqnum[i] = 0; + scb->seqctl[i] = 0xFFFF; + } + + scb->seqctl_nonqos = 0xFFFF; + scb->magic = SCB_MAGIC; +} + +/* d11 core init + * reset PSM + * download ucode/PCM + * let ucode run to suspended + * download ucode inits + * config other core registers + * init dma + */ +static void brcms_b_coreinit(struct brcms_c_info *wlc) +{ + struct brcms_hardware *wlc_hw = wlc->hw; + struct d11regs __iomem *regs; + u32 sflags; + uint bcnint_us; + uint i = 0; + bool fifosz_fixup = false; + int err = 0; + u16 buf[NFIFO]; + struct wiphy *wiphy = wlc->wiphy; + struct brcms_ucode *ucode = &wlc_hw->wlc->wl->ucode; + + regs = wlc_hw->regs; + + BCMMSG(wlc->wiphy, "wl%d\n", wlc_hw->unit); + + /* reset PSM */ + brcms_b_mctrl(wlc_hw, ~0, (MCTL_IHR_EN | MCTL_PSM_JMP_0 | MCTL_WAKE)); + + brcms_ucode_download(wlc_hw); + /* + * FIFOSZ fixup. driver wants to controls the fifo allocation. + */ + fifosz_fixup = true; + + /* let the PSM run to the suspended state, set mode to BSS STA */ + W_REG(®s->macintstatus, -1); + brcms_b_mctrl(wlc_hw, ~0, + (MCTL_IHR_EN | MCTL_INFRA | MCTL_PSM_RUN | MCTL_WAKE)); + + /* wait for ucode to self-suspend after auto-init */ + SPINWAIT(((R_REG(®s->macintstatus) & MI_MACSSPNDD) == 0), + 1000 * 1000); + if ((R_REG(®s->macintstatus) & MI_MACSSPNDD) == 0) + wiphy_err(wiphy, "wl%d: wlc_coreinit: ucode did not self-" + "suspend!\n", wlc_hw->unit); + + brcms_c_gpio_init(wlc); + + sflags = ai_core_sflags(wlc_hw->sih, 0, 0); + + if (D11REV_IS(wlc_hw->corerev, 23)) { + if (BRCMS_ISNPHY(wlc_hw->band)) + brcms_c_write_inits(wlc_hw, ucode->d11n0initvals16); + else + wiphy_err(wiphy, "%s: wl%d: unsupported phy in corerev" + " %d\n", __func__, wlc_hw->unit, + wlc_hw->corerev); + } else if (D11REV_IS(wlc_hw->corerev, 24)) { + if (BRCMS_ISLCNPHY(wlc_hw->band)) + brcms_c_write_inits(wlc_hw, ucode->d11lcn0initvals24); + else + wiphy_err(wiphy, "%s: wl%d: unsupported phy in corerev" + " %d\n", __func__, wlc_hw->unit, + wlc_hw->corerev); + } else { + wiphy_err(wiphy, "%s: wl%d: unsupported corerev %d\n", + __func__, wlc_hw->unit, wlc_hw->corerev); + } + + /* For old ucode, txfifo sizes needs to be modified(increased) */ + if (fifosz_fixup == true) + brcms_b_corerev_fifofixup(wlc_hw); + + /* check txfifo allocations match between ucode and driver */ + buf[TX_AC_BE_FIFO] = brcms_b_read_shm(wlc_hw, M_FIFOSIZE0); + if (buf[TX_AC_BE_FIFO] != wlc_hw->xmtfifo_sz[TX_AC_BE_FIFO]) { + i = TX_AC_BE_FIFO; + err = -1; + } + buf[TX_AC_VI_FIFO] = brcms_b_read_shm(wlc_hw, M_FIFOSIZE1); + if (buf[TX_AC_VI_FIFO] != wlc_hw->xmtfifo_sz[TX_AC_VI_FIFO]) { + i = TX_AC_VI_FIFO; + err = -1; + } + buf[TX_AC_BK_FIFO] = brcms_b_read_shm(wlc_hw, M_FIFOSIZE2); + buf[TX_AC_VO_FIFO] = (buf[TX_AC_BK_FIFO] >> 8) & 0xff; + buf[TX_AC_BK_FIFO] &= 0xff; + if (buf[TX_AC_BK_FIFO] != wlc_hw->xmtfifo_sz[TX_AC_BK_FIFO]) { + i = TX_AC_BK_FIFO; + err = -1; + } + if (buf[TX_AC_VO_FIFO] != wlc_hw->xmtfifo_sz[TX_AC_VO_FIFO]) { + i = TX_AC_VO_FIFO; + err = -1; + } + buf[TX_BCMC_FIFO] = brcms_b_read_shm(wlc_hw, M_FIFOSIZE3); + buf[TX_ATIM_FIFO] = (buf[TX_BCMC_FIFO] >> 8) & 0xff; + buf[TX_BCMC_FIFO] &= 0xff; + if (buf[TX_BCMC_FIFO] != wlc_hw->xmtfifo_sz[TX_BCMC_FIFO]) { + i = TX_BCMC_FIFO; + err = -1; + } + if (buf[TX_ATIM_FIFO] != wlc_hw->xmtfifo_sz[TX_ATIM_FIFO]) { + i = TX_ATIM_FIFO; + err = -1; + } + if (err != 0) + wiphy_err(wiphy, "wlc_coreinit: txfifo mismatch: ucode size %d" + " driver size %d index %d\n", buf[i], + wlc_hw->xmtfifo_sz[i], i); + + /* make sure we can still talk to the mac */ + WARN_ON(R_REG(®s->maccontrol) == 0xffffffff); + + /* band-specific inits done by wlc_bsinit() */ + + /* Set up frame burst size and antenna swap threshold init values */ + brcms_b_write_shm(wlc_hw, M_MBURST_SIZE, MAXTXFRAMEBURST); + brcms_b_write_shm(wlc_hw, M_MAX_ANTCNT, ANTCNT); + + /* enable one rx interrupt per received frame */ + W_REG(®s->intrcvlazy[0], (1 << IRL_FC_SHIFT)); + + /* set the station mode (BSS STA) */ + brcms_b_mctrl(wlc_hw, + (MCTL_INFRA | MCTL_DISCARD_PMQ | MCTL_AP), + (MCTL_INFRA | MCTL_DISCARD_PMQ)); + + /* set up Beacon interval */ + bcnint_us = 0x8000 << 10; + W_REG(®s->tsf_cfprep, (bcnint_us << CFPREP_CBI_SHIFT)); + W_REG(®s->tsf_cfpstart, bcnint_us); + W_REG(®s->macintstatus, MI_GP1); + + /* write interrupt mask */ + W_REG(®s->intctrlregs[RX_FIFO].intmask, DEF_RXINTMASK); + + /* allow the MAC to control the PHY clock (dynamic on/off) */ + brcms_b_macphyclk_set(wlc_hw, ON); + + /* program dynamic clock control fast powerup delay register */ + wlc->fastpwrup_dly = ai_clkctl_fast_pwrup_delay(wlc_hw->sih); + W_REG(®s->scc_fastpwrup_dly, wlc->fastpwrup_dly); + + /* tell the ucode the corerev */ + brcms_b_write_shm(wlc_hw, M_MACHW_VER, (u16) wlc_hw->corerev); + + /* tell the ucode MAC capabilities */ + brcms_b_write_shm(wlc_hw, M_MACHW_CAP_L, + (u16) (wlc_hw->machwcap & 0xffff)); + brcms_b_write_shm(wlc_hw, M_MACHW_CAP_H, + (u16) ((wlc_hw-> + machwcap >> 16) & 0xffff)); + + /* write retry limits to SCR, this done after PSM init */ + W_REG(®s->objaddr, OBJADDR_SCR_SEL | S_DOT11_SRC_LMT); + (void)R_REG(®s->objaddr); + W_REG(®s->objdata, wlc_hw->SRL); + W_REG(®s->objaddr, OBJADDR_SCR_SEL | S_DOT11_LRC_LMT); + (void)R_REG(®s->objaddr); + W_REG(®s->objdata, wlc_hw->LRL); + + /* write rate fallback retry limits */ + brcms_b_write_shm(wlc_hw, M_SFRMTXCNTFBRTHSD, wlc_hw->SFBL); + brcms_b_write_shm(wlc_hw, M_LFRMTXCNTFBRTHSD, wlc_hw->LFBL); + + AND_REG(®s->ifs_ctl, 0x0FFF); + W_REG(®s->ifs_aifsn, EDCF_AIFSN_MIN); + + /* init the tx dma engines */ + for (i = 0; i < NFIFO; i++) { + if (wlc_hw->di[i]) + dma_txinit(wlc_hw->di[i]); + } + + /* init the rx dma engine(s) and post receive buffers */ + dma_rxinit(wlc_hw->di[RX_FIFO]); + dma_rxfill(wlc_hw->di[RX_FIFO]); +} + +void +static brcms_b_init(struct brcms_hardware *wlc_hw, u16 chanspec, + bool mute) { + u32 macintmask; + bool fastclk; + struct brcms_c_info *wlc = wlc_hw->wlc; + + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + + /* request FAST clock if not on */ + fastclk = wlc_hw->forcefastclk; + if (!fastclk) + brcms_b_clkctl_clk(wlc_hw, CLK_FAST); + + /* disable interrupts */ + macintmask = brcms_intrsoff(wlc->wl); + + /* set up the specified band and chanspec */ + brcms_c_setxband(wlc_hw, chspec_bandunit(chanspec)); + wlc_phy_chanspec_radio_set(wlc_hw->band->pi, chanspec); + + /* do one-time phy inits and calibration */ + wlc_phy_cal_init(wlc_hw->band->pi); + + /* core-specific initialization */ + brcms_b_coreinit(wlc); + + /* suspend the tx fifos and mute the phy for preism cac time */ + if (mute) + brcms_b_mute(wlc_hw, ON, PHY_MUTE_FOR_PREISM); + + /* band-specific inits */ + brcms_b_bsinit(wlc, chanspec); + + /* restore macintmask */ + brcms_intrsrestore(wlc->wl, macintmask); + + /* seed wake_override with BRCMS_WAKE_OVERRIDE_MACSUSPEND since the mac + * is suspended and brcms_c_enable_mac() will clear this override bit. + */ + mboolset(wlc_hw->wake_override, BRCMS_WAKE_OVERRIDE_MACSUSPEND); + + /* + * initialize mac_suspend_depth to 1 to match ucode + * initial suspended state + */ + wlc_hw->mac_suspend_depth = 1; + + /* restore the clk */ + if (!fastclk) + brcms_b_clkctl_clk(wlc_hw, CLK_DYNAMIC); +} + +static void brcms_c_set_phy_chanspec(struct brcms_c_info *wlc, + u16 chanspec) +{ + /* Save our copy of the chanspec */ + wlc->chanspec = chanspec; + + /* Set the chanspec and power limits for this locale */ + brcms_c_channel_set_chanspec(wlc->cmi, chanspec, BRCMS_TXPWR_MAX); + + if (wlc->stf->ss_algosel_auto) + brcms_c_stf_ss_algo_channel_get(wlc, &wlc->stf->ss_algo_channel, + chanspec); + + brcms_c_stf_ss_update(wlc, wlc->band); +} + +static void +brcms_default_rateset(struct brcms_c_info *wlc, struct brcms_c_rateset *rs) +{ + brcms_c_rateset_default(rs, NULL, wlc->band->phytype, + wlc->band->bandtype, false, BRCMS_RATE_MASK_FULL, + (bool) (wlc->pub->_n_enab & SUPPORT_11N), + brcms_chspec_bw(wlc->default_bss->chanspec), + wlc->stf->txstreams); +} + +/* derive wlc->band->basic_rate[] table from 'rateset' */ +static void brcms_c_rate_lookup_init(struct brcms_c_info *wlc, + struct brcms_c_rateset *rateset) +{ + u8 rate; + u8 mandatory; + u8 cck_basic = 0; + u8 ofdm_basic = 0; + u8 *br = wlc->band->basic_rate; + uint i; + + /* incoming rates are in 500kbps units as in 802.11 Supported Rates */ + memset(br, 0, BRCM_MAXRATE + 1); + + /* For each basic rate in the rates list, make an entry in the + * best basic lookup. + */ + for (i = 0; i < rateset->count; i++) { + /* only make an entry for a basic rate */ + if (!(rateset->rates[i] & BRCMS_RATE_FLAG)) + continue; + + /* mask off basic bit */ + rate = (rateset->rates[i] & BRCMS_RATE_MASK); + + if (rate > BRCM_MAXRATE) { + wiphy_err(wlc->wiphy, "brcms_c_rate_lookup_init: " + "invalid rate 0x%X in rate set\n", + rateset->rates[i]); + continue; + } + + br[rate] = rate; + } + + /* The rate lookup table now has non-zero entries for each + * basic rate, equal to the basic rate: br[basicN] = basicN + * + * To look up the best basic rate corresponding to any + * particular rate, code can use the basic_rate table + * like this + * + * basic_rate = wlc->band->basic_rate[tx_rate] + * + * Make sure there is a best basic rate entry for + * every rate by walking up the table from low rates + * to high, filling in holes in the lookup table + */ + + for (i = 0; i < wlc->band->hw_rateset.count; i++) { + rate = wlc->band->hw_rateset.rates[i]; + + if (br[rate] != 0) { + /* This rate is a basic rate. + * Keep track of the best basic rate so far by + * modulation type. + */ + if (is_ofdm_rate(rate)) + ofdm_basic = rate; + else + cck_basic = rate; + + continue; + } + + /* This rate is not a basic rate so figure out the + * best basic rate less than this rate and fill in + * the hole in the table + */ + + br[rate] = is_ofdm_rate(rate) ? ofdm_basic : cck_basic; + + if (br[rate] != 0) + continue; + + if (is_ofdm_rate(rate)) { + /* + * In 11g and 11a, the OFDM mandatory rates + * are 6, 12, and 24 Mbps + */ + if (rate >= BRCM_RATE_24M) + mandatory = BRCM_RATE_24M; + else if (rate >= BRCM_RATE_12M) + mandatory = BRCM_RATE_12M; + else + mandatory = BRCM_RATE_6M; + } else { + /* In 11b, all CCK rates are mandatory 1 - 11 Mbps */ + mandatory = rate; + } + + br[rate] = mandatory; + } +} + +static void brcms_c_bandinit_ordered(struct brcms_c_info *wlc, + u16 chanspec) +{ + struct brcms_c_rateset default_rateset; + uint parkband; + uint i, band_order[2]; + + BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); + /* + * We might have been bandlocked during down and the chip + * power-cycled (hibernate). Figure out the right band to park on + */ + if (wlc->bandlocked || wlc->pub->_nbands == 1) { + /* updated in brcms_c_bandlock() */ + parkband = wlc->band->bandunit; + band_order[0] = band_order[1] = parkband; + } else { + /* park on the band of the specified chanspec */ + parkband = chspec_bandunit(chanspec); + + /* order so that parkband initialize last */ + band_order[0] = parkband ^ 1; + band_order[1] = parkband; + } + + /* make each band operational, software state init */ + for (i = 0; i < wlc->pub->_nbands; i++) { + uint j = band_order[i]; + + wlc->band = wlc->bandstate[j]; + + brcms_default_rateset(wlc, &default_rateset); + + /* fill in hw_rate */ + brcms_c_rateset_filter(&default_rateset, &wlc->band->hw_rateset, + false, BRCMS_RATES_CCK_OFDM, BRCMS_RATE_MASK, + (bool) (wlc->pub->_n_enab & SUPPORT_11N)); + + /* init basic rate lookup */ + brcms_c_rate_lookup_init(wlc, &default_rateset); + } + + /* sync up phy/radio chanspec */ + brcms_c_set_phy_chanspec(wlc, chanspec); +} + +static void brcms_c_mac_bcn_promisc(struct brcms_c_info *wlc) +{ + if (wlc->bcnmisc_monitor) + brcms_b_mctrl(wlc->hw, MCTL_BCNS_PROMISC, MCTL_BCNS_PROMISC); + else + brcms_b_mctrl(wlc->hw, MCTL_BCNS_PROMISC, 0); +} + +void brcms_c_mac_bcn_promisc_change(struct brcms_c_info *wlc, bool promisc) +{ + wlc->bcnmisc_monitor = promisc; + brcms_c_mac_bcn_promisc(wlc); +} + +/* set or clear maccontrol bits MCTL_PROMISC and MCTL_KEEPCONTROL */ +static void brcms_c_mac_promisc(struct brcms_c_info *wlc) +{ + u32 promisc_bits = 0; + + /* + * promiscuous mode just sets MCTL_PROMISC + * Note: APs get all BSS traffic without the need to set + * the MCTL_PROMISC bit since all BSS data traffic is + * directed at the AP + */ + if (wlc->pub->promisc) + promisc_bits |= MCTL_PROMISC; + + /* monitor mode needs both MCTL_PROMISC and MCTL_KEEPCONTROL + * Note: monitor mode also needs MCTL_BCNS_PROMISC, but that is + * handled in brcms_c_mac_bcn_promisc() + */ + if (wlc->monitor) + promisc_bits |= MCTL_PROMISC | MCTL_KEEPCONTROL; + + brcms_b_mctrl(wlc->hw, MCTL_PROMISC | MCTL_KEEPCONTROL, promisc_bits); +} + +/* + * ucode, hwmac update + * Channel dependent updates for ucode and hw + */ +static void brcms_c_ucode_mac_upd(struct brcms_c_info *wlc) +{ + /* enable or disable any active IBSSs depending on whether or not + * we are on the home channel + */ + if (wlc->home_chanspec == wlc_phy_chanspec_get(wlc->band->pi)) { + if (wlc->pub->associated) { + /* + * BMAC_NOTE: This is something that should be fixed + * in ucode inits. I think that the ucode inits set + * up the bcn templates and shm values with a bogus + * beacon. This should not be done in the inits. If + * ucode needs to set up a beacon for testing, the + * test routines should write it down, not expect the + * inits to populate a bogus beacon. + */ + if (BRCMS_PHY_11N_CAP(wlc->band)) + brcms_b_write_shm(wlc->hw, + M_BCN_TXTSF_OFFSET, 0); + } + } else { + /* disable an active IBSS if we are not on the home channel */ + } + + /* update the various promisc bits */ + brcms_c_mac_bcn_promisc(wlc); + brcms_c_mac_promisc(wlc); +} + +static void brcms_c_write_rate_shm(struct brcms_c_info *wlc, u8 rate, + u8 basic_rate) +{ + u8 phy_rate, index; + u8 basic_phy_rate, basic_index; + u16 dir_table, basic_table; + u16 basic_ptr; + + /* Shared memory address for the table we are reading */ + dir_table = is_ofdm_rate(basic_rate) ? M_RT_DIRMAP_A : M_RT_DIRMAP_B; + + /* Shared memory address for the table we are writing */ + basic_table = is_ofdm_rate(rate) ? M_RT_BBRSMAP_A : M_RT_BBRSMAP_B; + + /* + * for a given rate, the LS-nibble of the PLCP SIGNAL field is + * the index into the rate table. + */ + phy_rate = rate_info[rate] & BRCMS_RATE_MASK; + basic_phy_rate = rate_info[basic_rate] & BRCMS_RATE_MASK; + index = phy_rate & 0xf; + basic_index = basic_phy_rate & 0xf; + + /* Find the SHM pointer to the ACK rate entry by looking in the + * Direct-map Table + */ + basic_ptr = brcms_b_read_shm(wlc->hw, (dir_table + basic_index * 2)); + + /* Update the SHM BSS-basic-rate-set mapping table with the pointer + * to the correct basic rate for the given incoming rate + */ + brcms_b_write_shm(wlc->hw, (basic_table + index * 2), basic_ptr); +} + +static const struct brcms_c_rateset * +brcms_c_rateset_get_hwrs(struct brcms_c_info *wlc) +{ + const struct brcms_c_rateset *rs_dflt; + + if (BRCMS_PHY_11N_CAP(wlc->band)) { + if (wlc->band->bandtype == BRCM_BAND_5G) + rs_dflt = &ofdm_mimo_rates; + else + rs_dflt = &cck_ofdm_mimo_rates; + } else if (wlc->band->gmode) + rs_dflt = &cck_ofdm_rates; + else + rs_dflt = &cck_rates; + + return rs_dflt; +} + +static void brcms_c_set_ratetable(struct brcms_c_info *wlc) +{ + const struct brcms_c_rateset *rs_dflt; + struct brcms_c_rateset rs; + u8 rate, basic_rate; + uint i; + + rs_dflt = brcms_c_rateset_get_hwrs(wlc); + + brcms_c_rateset_copy(rs_dflt, &rs); + brcms_c_rateset_mcs_upd(&rs, wlc->stf->txstreams); + + /* walk the phy rate table and update SHM basic rate lookup table */ + for (i = 0; i < rs.count; i++) { + rate = rs.rates[i] & BRCMS_RATE_MASK; + + /* for a given rate brcms_basic_rate returns the rate at + * which a response ACK/CTS should be sent. + */ + basic_rate = brcms_basic_rate(wlc, rate); + if (basic_rate == 0) + /* This should only happen if we are using a + * restricted rateset. + */ + basic_rate = rs.rates[0] & BRCMS_RATE_MASK; + + brcms_c_write_rate_shm(wlc, rate, basic_rate); + } +} + +/* band-specific init */ +static void brcms_c_bsinit(struct brcms_c_info *wlc) +{ + BCMMSG(wlc->wiphy, "wl%d: bandunit %d\n", + wlc->pub->unit, wlc->band->bandunit); + + /* write ucode ACK/CTS rate table */ + brcms_c_set_ratetable(wlc); + + /* update some band specific mac configuration */ + brcms_c_ucode_mac_upd(wlc); + + /* init antenna selection */ + brcms_c_antsel_init(wlc->asi); + +} + +/* formula: IDLE_BUSY_RATIO_X_16 = (100-duty_cycle)/duty_cycle*16 */ +static int +brcms_c_duty_cycle_set(struct brcms_c_info *wlc, int duty_cycle, bool isOFDM, + bool writeToShm) +{ + int idle_busy_ratio_x_16 = 0; + uint offset = + isOFDM ? M_TX_IDLE_BUSY_RATIO_X_16_OFDM : + M_TX_IDLE_BUSY_RATIO_X_16_CCK; + if (duty_cycle > 100 || duty_cycle < 0) { + wiphy_err(wlc->wiphy, "wl%d: duty cycle value off limit\n", + wlc->pub->unit); + return -EINVAL; + } + if (duty_cycle) + idle_busy_ratio_x_16 = (100 - duty_cycle) * 16 / duty_cycle; + /* Only write to shared memory when wl is up */ + if (writeToShm) + brcms_b_write_shm(wlc->hw, offset, (u16) idle_busy_ratio_x_16); + + if (isOFDM) + wlc->tx_duty_cycle_ofdm = (u16) duty_cycle; + else + wlc->tx_duty_cycle_cck = (u16) duty_cycle; + + return 0; +} + +/* + * Initialize the base precedence map for dequeueing + * from txq based on WME settings + */ +static void brcms_c_tx_prec_map_init(struct brcms_c_info *wlc) +{ + wlc->tx_prec_map = BRCMS_PREC_BMP_ALL; + memset(wlc->fifo2prec_map, 0, NFIFO * sizeof(u16)); + + wlc->fifo2prec_map[TX_AC_BK_FIFO] = BRCMS_PREC_BMP_AC_BK; + wlc->fifo2prec_map[TX_AC_BE_FIFO] = BRCMS_PREC_BMP_AC_BE; + wlc->fifo2prec_map[TX_AC_VI_FIFO] = BRCMS_PREC_BMP_AC_VI; + wlc->fifo2prec_map[TX_AC_VO_FIFO] = BRCMS_PREC_BMP_AC_VO; +} + +static void +brcms_c_txflowcontrol_signal(struct brcms_c_info *wlc, + struct brcms_txq_info *qi, bool on, int prio) +{ + /* transmit flowcontrol is not yet implemented */ +} + +static void brcms_c_txflowcontrol_reset(struct brcms_c_info *wlc) +{ + struct brcms_txq_info *qi; + + for (qi = wlc->tx_queues; qi != NULL; qi = qi->next) { + if (qi->stopped) { + brcms_c_txflowcontrol_signal(wlc, qi, OFF, ALLPRIO); + qi->stopped = 0; + } + } +} + +/* push sw hps and wake state through hardware */ +static void brcms_c_set_ps_ctrl(struct brcms_c_info *wlc) +{ + u32 v1, v2; + bool hps; + bool awake_before; + + hps = brcms_c_ps_allowed(wlc); + + BCMMSG(wlc->wiphy, "wl%d: hps %d\n", wlc->pub->unit, hps); + + v1 = R_REG(&wlc->regs->maccontrol); + v2 = MCTL_WAKE; + if (hps) + v2 |= MCTL_HPS; + + brcms_b_mctrl(wlc->hw, MCTL_WAKE | MCTL_HPS, v2); + + awake_before = ((v1 & MCTL_WAKE) || ((v1 & MCTL_HPS) == 0)); + + if (!awake_before) + brcms_b_wait_for_wake(wlc->hw); +} + +/* + * Write this BSS config's MAC address to core. + * Updates RXE match engine. + */ +static int brcms_c_set_mac(struct brcms_bss_cfg *bsscfg) +{ + int err = 0; + struct brcms_c_info *wlc = bsscfg->wlc; + + /* enter the MAC addr into the RXE match registers */ + brcms_c_set_addrmatch(wlc, RCM_MAC_OFFSET, bsscfg->cur_etheraddr); + + brcms_c_ampdu_macaddr_upd(wlc); + + return err; +} + +/* Write the BSS config's BSSID address to core (set_bssid in d11procs.tcl). + * Updates RXE match engine. + */ +static void brcms_c_set_bssid(struct brcms_bss_cfg *bsscfg) +{ + /* we need to update BSSID in RXE match registers */ + brcms_c_set_addrmatch(bsscfg->wlc, RCM_BSSID_OFFSET, bsscfg->BSSID); +} + +static void brcms_b_set_shortslot(struct brcms_hardware *wlc_hw, bool shortslot) +{ + wlc_hw->shortslot = shortslot; + + if (wlc_hw->band->bandtype == BRCM_BAND_2G && wlc_hw->up) { + brcms_c_suspend_mac_and_wait(wlc_hw->wlc); + brcms_b_update_slot_timing(wlc_hw, shortslot); + brcms_c_enable_mac(wlc_hw->wlc); + } +} + +/* + * Suspend the the MAC and update the slot timing + * for standard 11b/g (20us slots) or shortslot 11g (9us slots). + */ +static void brcms_c_switch_shortslot(struct brcms_c_info *wlc, bool shortslot) +{ + /* use the override if it is set */ + if (wlc->shortslot_override != BRCMS_SHORTSLOT_AUTO) + shortslot = (wlc->shortslot_override == BRCMS_SHORTSLOT_ON); + + if (wlc->shortslot == shortslot) + return; + + wlc->shortslot = shortslot; + + brcms_b_set_shortslot(wlc->hw, shortslot); +} + +static void brcms_c_set_home_chanspec(struct brcms_c_info *wlc, u16 chanspec) +{ + if (wlc->home_chanspec != chanspec) { + wlc->home_chanspec = chanspec; + + if (wlc->bsscfg->associated) + wlc->bsscfg->current_bss->chanspec = chanspec; + } +} + +void +brcms_b_set_chanspec(struct brcms_hardware *wlc_hw, u16 chanspec, + bool mute, struct txpwr_limits *txpwr) +{ + uint bandunit; + + BCMMSG(wlc_hw->wlc->wiphy, "wl%d: 0x%x\n", wlc_hw->unit, chanspec); + + wlc_hw->chanspec = chanspec; + + /* Switch bands if necessary */ + if (wlc_hw->_nbands > 1) { + bandunit = chspec_bandunit(chanspec); + if (wlc_hw->band->bandunit != bandunit) { + /* brcms_b_setband disables other bandunit, + * use light band switch if not up yet + */ + if (wlc_hw->up) { + wlc_phy_chanspec_radio_set(wlc_hw-> + bandstate[bandunit]-> + pi, chanspec); + brcms_b_setband(wlc_hw, bandunit, chanspec); + } else { + brcms_c_setxband(wlc_hw, bandunit); + } + } + } + + wlc_phy_initcal_enable(wlc_hw->band->pi, !mute); + + if (!wlc_hw->up) { + if (wlc_hw->clk) + wlc_phy_txpower_limit_set(wlc_hw->band->pi, txpwr, + chanspec); + wlc_phy_chanspec_radio_set(wlc_hw->band->pi, chanspec); + } else { + wlc_phy_chanspec_set(wlc_hw->band->pi, chanspec); + wlc_phy_txpower_limit_set(wlc_hw->band->pi, txpwr, chanspec); + + /* Update muting of the channel */ + brcms_b_mute(wlc_hw, mute, 0); + } +} + +/* switch to and initialize new band */ +static void brcms_c_setband(struct brcms_c_info *wlc, + uint bandunit) +{ + wlc->band = wlc->bandstate[bandunit]; + + if (!wlc->pub->up) + return; + + /* wait for at least one beacon before entering sleeping state */ + brcms_c_set_ps_ctrl(wlc); + + /* band-specific initializations */ + brcms_c_bsinit(wlc); +} + +static void brcms_c_set_chanspec(struct brcms_c_info *wlc, u16 chanspec) +{ + uint bandunit; + bool switchband = false; + u16 old_chanspec = wlc->chanspec; + + if (!brcms_c_valid_chanspec_db(wlc->cmi, chanspec)) { + wiphy_err(wlc->wiphy, "wl%d: %s: Bad channel %d\n", + wlc->pub->unit, __func__, CHSPEC_CHANNEL(chanspec)); + return; + } + + /* Switch bands if necessary */ + if (wlc->pub->_nbands > 1) { + bandunit = chspec_bandunit(chanspec); + if (wlc->band->bandunit != bandunit || wlc->bandinit_pending) { + switchband = true; + if (wlc->bandlocked) { + wiphy_err(wlc->wiphy, "wl%d: %s: chspec %d " + "band is locked!\n", + wlc->pub->unit, __func__, + CHSPEC_CHANNEL(chanspec)); + return; + } + /* + * should the setband call come after the + * brcms_b_chanspec() ? if the setband updates + * (brcms_c_bsinit) use low level calls to inspect and + * set state, the state inspected may be from the wrong + * band, or the following brcms_b_set_chanspec() may + * undo the work. + */ + brcms_c_setband(wlc, bandunit); + } + } + + /* sync up phy/radio chanspec */ + brcms_c_set_phy_chanspec(wlc, chanspec); + + /* init antenna selection */ + if (brcms_chspec_bw(old_chanspec) != brcms_chspec_bw(chanspec)) { + brcms_c_antsel_init(wlc->asi); + + /* Fix the hardware rateset based on bw. + * Mainly add MCS32 for 40Mhz, remove MCS 32 for 20Mhz + */ + brcms_c_rateset_bw_mcs_filter(&wlc->band->hw_rateset, + wlc->band->mimo_cap_40 ? brcms_chspec_bw(chanspec) : 0); + } + + /* update some mac configuration since chanspec changed */ + brcms_c_ucode_mac_upd(wlc); +} + +/* + * This function changes the phytxctl for beacon based on current + * beacon ratespec AND txant setting as per this table: + * ratespec CCK ant = wlc->stf->txant + * OFDM ant = 3 + */ +void brcms_c_beacon_phytxctl_txant_upd(struct brcms_c_info *wlc, + u32 bcn_rspec) +{ + u16 phyctl; + u16 phytxant = wlc->stf->phytxant; + u16 mask = PHY_TXC_ANT_MASK; + + /* for non-siso rates or default setting, use the available chains */ + if (BRCMS_PHY_11N_CAP(wlc->band)) + phytxant = brcms_c_stf_phytxchain_sel(wlc, bcn_rspec); + + phyctl = brcms_b_read_shm(wlc->hw, M_BCN_PCTLWD); + phyctl = (phyctl & ~mask) | phytxant; + brcms_b_write_shm(wlc->hw, M_BCN_PCTLWD, phyctl); +} + +/* + * centralized protection config change function to simplify debugging, no + * consistency checking this should be called only on changes to avoid overhead + * in periodic function + */ +void brcms_c_protection_upd(struct brcms_c_info *wlc, uint idx, int val) +{ + BCMMSG(wlc->wiphy, "idx %d, val %d\n", idx, val); + + switch (idx) { + case BRCMS_PROT_G_SPEC: + wlc->protection->_g = (bool) val; + break; + case BRCMS_PROT_G_OVR: + wlc->protection->g_override = (s8) val; + break; + case BRCMS_PROT_G_USER: + wlc->protection->gmode_user = (u8) val; + break; + case BRCMS_PROT_OVERLAP: + wlc->protection->overlap = (s8) val; + break; + case BRCMS_PROT_N_USER: + wlc->protection->nmode_user = (s8) val; + break; + case BRCMS_PROT_N_CFG: + wlc->protection->n_cfg = (s8) val; + break; + case BRCMS_PROT_N_CFG_OVR: + wlc->protection->n_cfg_override = (s8) val; + break; + case BRCMS_PROT_N_NONGF: + wlc->protection->nongf = (bool) val; + break; + case BRCMS_PROT_N_NONGF_OVR: + wlc->protection->nongf_override = (s8) val; + break; + case BRCMS_PROT_N_PAM_OVR: + wlc->protection->n_pam_override = (s8) val; + break; + case BRCMS_PROT_N_OBSS: + wlc->protection->n_obss = (bool) val; + break; + + default: + break; + } + +} + +static void brcms_c_ht_update_sgi_rx(struct brcms_c_info *wlc, int val) +{ + if (wlc->pub->up) { + brcms_c_update_beacon(wlc); + brcms_c_update_probe_resp(wlc, true); + } +} + +static void brcms_c_ht_update_ldpc(struct brcms_c_info *wlc, s8 val) +{ + wlc->stf->ldpc = val; + + if (wlc->pub->up) { + brcms_c_update_beacon(wlc); + brcms_c_update_probe_resp(wlc, true); + wlc_phy_ldpc_override_set(wlc->band->pi, (val ? true : false)); + } +} + +void brcms_c_wme_setparams(struct brcms_c_info *wlc, u16 aci, + const struct ieee80211_tx_queue_params *params, + bool suspend) +{ + int i; + struct shm_acparams acp_shm; + u16 *shm_entry; + + /* Only apply params if the core is out of reset and has clocks */ + if (!wlc->clk) { + wiphy_err(wlc->wiphy, "wl%d: %s : no-clock\n", wlc->pub->unit, + __func__); + return; + } + + memset((char *)&acp_shm, 0, sizeof(struct shm_acparams)); + /* fill in shm ac params struct */ + acp_shm.txop = params->txop; + /* convert from units of 32us to us for ucode */ + wlc->edcf_txop[aci & 0x3] = acp_shm.txop = + EDCF_TXOP2USEC(acp_shm.txop); + acp_shm.aifs = (params->aifs & EDCF_AIFSN_MASK); + + if (aci == AC_VI && acp_shm.txop == 0 + && acp_shm.aifs < EDCF_AIFSN_MAX) + acp_shm.aifs++; + + if (acp_shm.aifs < EDCF_AIFSN_MIN + || acp_shm.aifs > EDCF_AIFSN_MAX) { + wiphy_err(wlc->wiphy, "wl%d: edcf_setparams: bad " + "aifs %d\n", wlc->pub->unit, acp_shm.aifs); + } else { + acp_shm.cwmin = params->cw_min; + acp_shm.cwmax = params->cw_max; + acp_shm.cwcur = acp_shm.cwmin; + acp_shm.bslots = + R_REG(&wlc->regs->tsf_random) & acp_shm.cwcur; + acp_shm.reggap = acp_shm.bslots + acp_shm.aifs; + /* Indicate the new params to the ucode */ + acp_shm.status = brcms_b_read_shm(wlc->hw, (M_EDCF_QINFO + + wme_ac2fifo[aci] * + M_EDCF_QLEN + + M_EDCF_STATUS_OFF)); + acp_shm.status |= WME_STATUS_NEWAC; + + /* Fill in shm acparam table */ + shm_entry = (u16 *) &acp_shm; + for (i = 0; i < (int)sizeof(struct shm_acparams); i += 2) + brcms_b_write_shm(wlc->hw, + M_EDCF_QINFO + + wme_ac2fifo[aci] * M_EDCF_QLEN + i, + *shm_entry++); + } + + if (suspend) { + brcms_c_suspend_mac_and_wait(wlc); + brcms_c_enable_mac(wlc); + } +} + +void brcms_c_edcf_setparams(struct brcms_c_info *wlc, bool suspend) +{ + u16 aci; + int i_ac; + struct ieee80211_tx_queue_params txq_pars; + static const struct edcf_acparam default_edcf_acparams[] = { + {EDCF_AC_BE_ACI_STA, EDCF_AC_BE_ECW_STA, EDCF_AC_BE_TXOP_STA}, + {EDCF_AC_BK_ACI_STA, EDCF_AC_BK_ECW_STA, EDCF_AC_BK_TXOP_STA}, + {EDCF_AC_VI_ACI_STA, EDCF_AC_VI_ECW_STA, EDCF_AC_VI_TXOP_STA}, + {EDCF_AC_VO_ACI_STA, EDCF_AC_VO_ECW_STA, EDCF_AC_VO_TXOP_STA} + }; /* ucode needs these parameters during its initialization */ + const struct edcf_acparam *edcf_acp = &default_edcf_acparams[0]; + + for (i_ac = 0; i_ac < AC_COUNT; i_ac++, edcf_acp++) { + /* find out which ac this set of params applies to */ + aci = (edcf_acp->ACI & EDCF_ACI_MASK) >> EDCF_ACI_SHIFT; + + /* fill in shm ac params struct */ + txq_pars.txop = edcf_acp->TXOP; + txq_pars.aifs = edcf_acp->ACI; + + /* CWmin = 2^(ECWmin) - 1 */ + txq_pars.cw_min = EDCF_ECW2CW(edcf_acp->ECW & EDCF_ECWMIN_MASK); + /* CWmax = 2^(ECWmax) - 1 */ + txq_pars.cw_max = EDCF_ECW2CW((edcf_acp->ECW & EDCF_ECWMAX_MASK) + >> EDCF_ECWMAX_SHIFT); + brcms_c_wme_setparams(wlc, aci, &txq_pars, suspend); + } + + if (suspend) { + brcms_c_suspend_mac_and_wait(wlc); + brcms_c_enable_mac(wlc); + } +} + +/* maintain LED behavior in down state */ +static void brcms_c_down_led_upd(struct brcms_c_info *wlc) +{ + /* + * maintain LEDs while in down state, turn on sbclk if + * not available yet. Turn on sbclk if necessary + */ + brcms_b_pllreq(wlc->hw, true, BRCMS_PLLREQ_FLIP); + brcms_b_pllreq(wlc->hw, false, BRCMS_PLLREQ_FLIP); +} + +static void brcms_c_radio_monitor_start(struct brcms_c_info *wlc) +{ + /* Don't start the timer if HWRADIO feature is disabled */ + if (wlc->radio_monitor) + return; + + wlc->radio_monitor = true; + brcms_b_pllreq(wlc->hw, true, BRCMS_PLLREQ_RADIO_MON); + brcms_add_timer(wlc->radio_timer, TIMER_INTERVAL_RADIOCHK, true); +} + +static void brcms_c_radio_disable(struct brcms_c_info *wlc) +{ + if (!wlc->pub->up) { + brcms_c_down_led_upd(wlc); + return; + } + + brcms_c_radio_monitor_start(wlc); + brcms_down(wlc->wl); +} + +static void brcms_c_radio_enable(struct brcms_c_info *wlc) +{ + if (wlc->pub->up) + return; + + if (brcms_deviceremoved(wlc)) + return; + + brcms_up(wlc->wl); +} + +static bool brcms_c_radio_monitor_stop(struct brcms_c_info *wlc) +{ + if (!wlc->radio_monitor) + return true; + + wlc->radio_monitor = false; + brcms_b_pllreq(wlc->hw, false, BRCMS_PLLREQ_RADIO_MON); + return brcms_del_timer(wlc->radio_timer); +} + +/* read hwdisable state and propagate to wlc flag */ +static void brcms_c_radio_hwdisable_upd(struct brcms_c_info *wlc) +{ + if (wlc->pub->hw_off) + return; + + if (brcms_b_radio_read_hwdisabled(wlc->hw)) + mboolset(wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE); + else + mboolclr(wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE); +} + +/* + * centralized radio disable/enable function, + * invoke radio enable/disable after updating hwradio status + */ +static void brcms_c_radio_upd(struct brcms_c_info *wlc) +{ + if (wlc->pub->radio_disabled) + brcms_c_radio_disable(wlc); + else + brcms_c_radio_enable(wlc); +} + +/* update hwradio status and return it */ +bool brcms_c_check_radio_disabled(struct brcms_c_info *wlc) +{ + brcms_c_radio_hwdisable_upd(wlc); + + return mboolisset(wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE) ? + true : false; +} + +/* periodical query hw radio button while driver is "down" */ +static void brcms_c_radio_timer(void *arg) +{ + struct brcms_c_info *wlc = (struct brcms_c_info *) arg; + + if (brcms_deviceremoved(wlc)) { + wiphy_err(wlc->wiphy, "wl%d: %s: dead chip\n", wlc->pub->unit, + __func__); + brcms_down(wlc->wl); + return; + } + + /* cap mpc off count */ + if (wlc->mpc_offcnt < BRCMS_MPC_MAX_DELAYCNT) + wlc->mpc_offcnt++; + + brcms_c_radio_hwdisable_upd(wlc); + brcms_c_radio_upd(wlc); +} + +/* common low-level watchdog code */ +static void brcms_b_watchdog(void *arg) +{ + struct brcms_c_info *wlc = (struct brcms_c_info *) arg; + struct brcms_hardware *wlc_hw = wlc->hw; + + BCMMSG(wlc->wiphy, "wl%d\n", wlc_hw->unit); + + if (!wlc_hw->up) + return; + + /* increment second count */ + wlc_hw->now++; + + /* Check for FIFO error interrupts */ + brcms_b_fifoerrors(wlc_hw); + + /* make sure RX dma has buffers */ + dma_rxfill(wlc->hw->di[RX_FIFO]); + + wlc_phy_watchdog(wlc_hw->band->pi); +} + +static void brcms_c_radio_mpc_upd(struct brcms_c_info *wlc) +{ + bool mpc_radio, radio_state; + + /* + * Clear the WL_RADIO_MPC_DISABLE bit when mpc feature is disabled + * in case the WL_RADIO_MPC_DISABLE bit was set. Stop the radio + * monitor also when WL_RADIO_MPC_DISABLE is the only reason that + * the radio is going down. + */ + if (!wlc->mpc) { + if (!wlc->pub->radio_disabled) + return; + mboolclr(wlc->pub->radio_disabled, WL_RADIO_MPC_DISABLE); + brcms_c_radio_upd(wlc); + if (!wlc->pub->radio_disabled) + brcms_c_radio_monitor_stop(wlc); + return; + } + + /* + * sync ismpc logic with WL_RADIO_MPC_DISABLE bit in + * wlc->pub->radio_disabled to go ON, always call radio_upd + * synchronously to go OFF, postpone radio_upd to later when + * context is safe(e.g. watchdog) + */ + radio_state = + (mboolisset(wlc->pub->radio_disabled, WL_RADIO_MPC_DISABLE) ? OFF : + ON); + mpc_radio = (brcms_c_ismpc(wlc) == true) ? OFF : ON; + + if (radio_state == ON && mpc_radio == OFF) + wlc->mpc_delay_off = wlc->mpc_dlycnt; + else if (radio_state == OFF && mpc_radio == ON) { + mboolclr(wlc->pub->radio_disabled, WL_RADIO_MPC_DISABLE); + brcms_c_radio_upd(wlc); + if (wlc->mpc_offcnt < BRCMS_MPC_THRESHOLD) + wlc->mpc_dlycnt = BRCMS_MPC_MAX_DELAYCNT; + else + wlc->mpc_dlycnt = BRCMS_MPC_MIN_DELAYCNT; + } + /* + * Below logic is meant to capture the transition from mpc off + * to mpc on for reasons other than wlc->mpc_delay_off keeping + * the mpc off. In that case reset wlc->mpc_delay_off to + * wlc->mpc_dlycnt, so that we restart the countdown of mpc_delay_off + */ + if ((wlc->prev_non_delay_mpc == false) && + (brcms_c_is_non_delay_mpc(wlc) == true) && wlc->mpc_delay_off) + wlc->mpc_delay_off = wlc->mpc_dlycnt; + + wlc->prev_non_delay_mpc = brcms_c_is_non_delay_mpc(wlc); +} + +/* common watchdog code */ +static void brcms_c_watchdog(void *arg) +{ + struct brcms_c_info *wlc = (struct brcms_c_info *) arg; + + BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); + + if (!wlc->pub->up) + return; + + if (brcms_deviceremoved(wlc)) { + wiphy_err(wlc->wiphy, "wl%d: %s: dead chip\n", wlc->pub->unit, + __func__); + brcms_down(wlc->wl); + return; + } + + /* increment second count */ + wlc->pub->now++; + + /* delay radio disable */ + if (wlc->mpc_delay_off) { + if (--wlc->mpc_delay_off == 0) { + mboolset(wlc->pub->radio_disabled, + WL_RADIO_MPC_DISABLE); + if (wlc->mpc && brcms_c_ismpc(wlc)) + wlc->mpc_offcnt = 0; + } + } + + /* mpc sync */ + brcms_c_radio_mpc_upd(wlc); + /* radio sync: sw/hw/mpc --> radio_disable/radio_enable */ + brcms_c_radio_hwdisable_upd(wlc); + brcms_c_radio_upd(wlc); + /* if radio is disable, driver may be down, quit here */ + if (wlc->pub->radio_disabled) + return; + + brcms_b_watchdog(wlc); + + /* + * occasionally sample mac stat counters to + * detect 16-bit counter wrap + */ + if ((wlc->pub->now % SW_TIMER_MAC_STAT_UPD) == 0) + brcms_c_statsupd(wlc); + + if (BRCMS_ISNPHY(wlc->band) && + ((wlc->pub->now - wlc->tempsense_lasttime) >= + BRCMS_TEMPSENSE_PERIOD)) { + wlc->tempsense_lasttime = wlc->pub->now; + brcms_c_tempsense_upd(wlc); + } +} + +static void brcms_c_watchdog_by_timer(void *arg) +{ + brcms_c_watchdog(arg); +} + +static bool brcms_c_timers_init(struct brcms_c_info *wlc, int unit) +{ + wlc->wdtimer = brcms_init_timer(wlc->wl, brcms_c_watchdog_by_timer, + wlc, "watchdog"); + if (!wlc->wdtimer) { + wiphy_err(wlc->wiphy, "wl%d: wl_init_timer for wdtimer " + "failed\n", unit); + goto fail; + } + + wlc->radio_timer = brcms_init_timer(wlc->wl, brcms_c_radio_timer, + wlc, "radio"); + if (!wlc->radio_timer) { + wiphy_err(wlc->wiphy, "wl%d: wl_init_timer for radio_timer " + "failed\n", unit); + goto fail; + } + + return true; + + fail: + return false; +} + +/* + * Initialize brcms_c_info default values ... + * may get overrides later in this function + */ +static void brcms_c_info_init(struct brcms_c_info *wlc, int unit) +{ + int i; + + /* Save our copy of the chanspec */ + wlc->chanspec = ch20mhz_chspec(1); + + /* various 802.11g modes */ + wlc->shortslot = false; + wlc->shortslot_override = BRCMS_SHORTSLOT_AUTO; + + brcms_c_protection_upd(wlc, BRCMS_PROT_G_OVR, BRCMS_PROTECTION_AUTO); + brcms_c_protection_upd(wlc, BRCMS_PROT_G_SPEC, false); + + brcms_c_protection_upd(wlc, BRCMS_PROT_N_CFG_OVR, + BRCMS_PROTECTION_AUTO); + brcms_c_protection_upd(wlc, BRCMS_PROT_N_CFG, BRCMS_N_PROTECTION_OFF); + brcms_c_protection_upd(wlc, BRCMS_PROT_N_NONGF_OVR, + BRCMS_PROTECTION_AUTO); + brcms_c_protection_upd(wlc, BRCMS_PROT_N_NONGF, false); + brcms_c_protection_upd(wlc, BRCMS_PROT_N_PAM_OVR, AUTO); + + brcms_c_protection_upd(wlc, BRCMS_PROT_OVERLAP, + BRCMS_PROTECTION_CTL_OVERLAP); + + /* 802.11g draft 4.0 NonERP elt advertisement */ + wlc->include_legacy_erp = true; + + wlc->stf->ant_rx_ovr = ANT_RX_DIV_DEF; + wlc->stf->txant = ANT_TX_DEF; + + wlc->prb_resp_timeout = BRCMS_PRB_RESP_TIMEOUT; + + wlc->usr_fragthresh = DOT11_DEFAULT_FRAG_LEN; + for (i = 0; i < NFIFO; i++) + wlc->fragthresh[i] = DOT11_DEFAULT_FRAG_LEN; + wlc->RTSThresh = DOT11_DEFAULT_RTS_LEN; + + /* default rate fallback retry limits */ + wlc->SFBL = RETRY_SHORT_FB; + wlc->LFBL = RETRY_LONG_FB; + + /* default mac retry limits */ + wlc->SRL = RETRY_SHORT_DEF; + wlc->LRL = RETRY_LONG_DEF; + + /* WME QoS mode is Auto by default */ + wlc->pub->_ampdu = AMPDU_AGG_HOST; + wlc->pub->bcmerror = 0; + + /* initialize mpc delay */ + wlc->mpc_delay_off = wlc->mpc_dlycnt = BRCMS_MPC_MIN_DELAYCNT; +} + +static uint brcms_c_attach_module(struct brcms_c_info *wlc) +{ + uint err = 0; + uint unit; + unit = wlc->pub->unit; + + wlc->asi = brcms_c_antsel_attach(wlc); + if (wlc->asi == NULL) { + wiphy_err(wlc->wiphy, "wl%d: attach: antsel_attach " + "failed\n", unit); + err = 44; + goto fail; + } + + wlc->ampdu = brcms_c_ampdu_attach(wlc); + if (wlc->ampdu == NULL) { + wiphy_err(wlc->wiphy, "wl%d: attach: ampdu_attach " + "failed\n", unit); + err = 50; + goto fail; + } + + if ((brcms_c_stf_attach(wlc) != 0)) { + wiphy_err(wlc->wiphy, "wl%d: attach: stf_attach " + "failed\n", unit); + err = 68; + goto fail; + } + fail: + return err; +} + +struct brcms_pub *brcms_c_pub(struct brcms_c_info *wlc) +{ + return wlc->pub; +} + +/* low level attach + * run backplane attach, init nvram + * run phy attach + * initialize software state for each core and band + * put the whole chip in reset(driver down state), no clock + */ +static int brcms_b_attach(struct brcms_c_info *wlc, u16 vendor, u16 device, + uint unit, bool piomode, void __iomem *regsva, + struct pci_dev *btparam) +{ + struct brcms_hardware *wlc_hw; + struct d11regs __iomem *regs; + char *macaddr = NULL; + uint err = 0; + uint j; + bool wme = false; + struct shared_phy_params sha_params; + struct wiphy *wiphy = wlc->wiphy; + + BCMMSG(wlc->wiphy, "wl%d: vendor 0x%x device 0x%x\n", unit, vendor, + device); + + wme = true; + + wlc_hw = wlc->hw; + wlc_hw->wlc = wlc; + wlc_hw->unit = unit; + wlc_hw->band = wlc_hw->bandstate[0]; + wlc_hw->_piomode = piomode; + + /* populate struct brcms_hardware with default values */ + brcms_b_info_init(wlc_hw); + + /* + * Do the hardware portion of the attach. Also initialize software + * state that depends on the particular hardware we are running. + */ + wlc_hw->sih = ai_attach(regsva, btparam); + if (wlc_hw->sih == NULL) { + wiphy_err(wiphy, "wl%d: brcms_b_attach: si_attach failed\n", + unit); + err = 11; + goto fail; + } + + /* verify again the device is supported */ + if (!brcms_c_chipmatch(vendor, device)) { + wiphy_err(wiphy, "wl%d: brcms_b_attach: Unsupported " + "vendor/device (0x%x/0x%x)\n", + unit, vendor, device); + err = 12; + goto fail; + } + + wlc_hw->vendorid = vendor; + wlc_hw->deviceid = device; + + /* set bar0 window to point at D11 core */ + wlc_hw->regs = (struct d11regs __iomem *) + ai_setcore(wlc_hw->sih, D11_CORE_ID, 0); + wlc_hw->corerev = ai_corerev(wlc_hw->sih); + + regs = wlc_hw->regs; + + wlc->regs = wlc_hw->regs; + + /* validate chip, chiprev and corerev */ + if (!brcms_c_isgoodchip(wlc_hw)) { + err = 13; + goto fail; + } + + /* initialize power control registers */ + ai_clkctl_init(wlc_hw->sih); + + /* request fastclock and force fastclock for the rest of attach + * bring the d11 core out of reset. + * For PMU chips, the first wlc_clkctl_clk is no-op since core-clk + * is still false; But it will be called again inside wlc_corereset, + * after d11 is out of reset. + */ + brcms_b_clkctl_clk(wlc_hw, CLK_FAST); + brcms_b_corereset(wlc_hw, BRCMS_USE_COREFLAGS); + + if (!brcms_b_validate_chip_access(wlc_hw)) { + wiphy_err(wiphy, "wl%d: brcms_b_attach: validate_chip_access " + "failed\n", unit); + err = 14; + goto fail; + } + + /* get the board rev, used just below */ + j = getintvar(wlc_hw->sih, BRCMS_SROM_BOARDREV); + /* promote srom boardrev of 0xFF to 1 */ + if (j == BOARDREV_PROMOTABLE) + j = BOARDREV_PROMOTED; + wlc_hw->boardrev = (u16) j; + if (!brcms_c_validboardtype(wlc_hw)) { + wiphy_err(wiphy, "wl%d: brcms_b_attach: Unsupported Broadcom " + "board type (0x%x)" " or revision level (0x%x)\n", + unit, wlc_hw->sih->boardtype, wlc_hw->boardrev); + err = 15; + goto fail; + } + wlc_hw->sromrev = (u8) getintvar(wlc_hw->sih, BRCMS_SROM_REV); + wlc_hw->boardflags = (u32) getintvar(wlc_hw->sih, + BRCMS_SROM_BOARDFLAGS); + wlc_hw->boardflags2 = (u32) getintvar(wlc_hw->sih, + BRCMS_SROM_BOARDFLAGS2); + + if (wlc_hw->boardflags & BFL_NOPLLDOWN) + brcms_b_pllreq(wlc_hw, true, BRCMS_PLLREQ_SHARED); + + /* check device id(srom, nvram etc.) to set bands */ + if (wlc_hw->deviceid == BCM43224_D11N_ID || + wlc_hw->deviceid == BCM43224_D11N_ID_VEN1) + /* Dualband boards */ + wlc_hw->_nbands = 2; + else + wlc_hw->_nbands = 1; + + if ((wlc_hw->sih->chip == BCM43225_CHIP_ID)) + wlc_hw->_nbands = 1; + + /* BMAC_NOTE: remove init of pub values when brcms_c_attach() + * unconditionally does the init of these values + */ + wlc->vendorid = wlc_hw->vendorid; + wlc->deviceid = wlc_hw->deviceid; + wlc->pub->sih = wlc_hw->sih; + wlc->pub->corerev = wlc_hw->corerev; + wlc->pub->sromrev = wlc_hw->sromrev; + wlc->pub->boardrev = wlc_hw->boardrev; + wlc->pub->boardflags = wlc_hw->boardflags; + wlc->pub->boardflags2 = wlc_hw->boardflags2; + wlc->pub->_nbands = wlc_hw->_nbands; + + wlc_hw->physhim = wlc_phy_shim_attach(wlc_hw, wlc->wl, wlc); + + if (wlc_hw->physhim == NULL) { + wiphy_err(wiphy, "wl%d: brcms_b_attach: wlc_phy_shim_attach " + "failed\n", unit); + err = 25; + goto fail; + } + + /* pass all the parameters to wlc_phy_shared_attach in one struct */ + sha_params.sih = wlc_hw->sih; + sha_params.physhim = wlc_hw->physhim; + sha_params.unit = unit; + sha_params.corerev = wlc_hw->corerev; + sha_params.vid = wlc_hw->vendorid; + sha_params.did = wlc_hw->deviceid; + sha_params.chip = wlc_hw->sih->chip; + sha_params.chiprev = wlc_hw->sih->chiprev; + sha_params.chippkg = wlc_hw->sih->chippkg; + sha_params.sromrev = wlc_hw->sromrev; + sha_params.boardtype = wlc_hw->sih->boardtype; + sha_params.boardrev = wlc_hw->boardrev; + sha_params.boardvendor = wlc_hw->sih->boardvendor; + sha_params.boardflags = wlc_hw->boardflags; + sha_params.boardflags2 = wlc_hw->boardflags2; + sha_params.buscorerev = wlc_hw->sih->buscorerev; + + /* alloc and save pointer to shared phy state area */ + wlc_hw->phy_sh = wlc_phy_shared_attach(&sha_params); + if (!wlc_hw->phy_sh) { + err = 16; + goto fail; + } + + /* initialize software state for each core and band */ + for (j = 0; j < wlc_hw->_nbands; j++) { + /* + * band0 is always 2.4Ghz + * band1, if present, is 5Ghz + */ + + brcms_c_setxband(wlc_hw, j); + + wlc_hw->band->bandunit = j; + wlc_hw->band->bandtype = j ? BRCM_BAND_5G : BRCM_BAND_2G; + wlc->band->bandunit = j; + wlc->band->bandtype = j ? BRCM_BAND_5G : BRCM_BAND_2G; + wlc->core->coreidx = ai_coreidx(wlc_hw->sih); + + wlc_hw->machwcap = R_REG(®s->machwcap); + wlc_hw->machwcap_backup = wlc_hw->machwcap; + + /* init tx fifo size */ + wlc_hw->xmtfifo_sz = + xmtfifo_sz[(wlc_hw->corerev - XMTFIFOTBL_STARTREV)]; + + /* Get a phy for this band */ + wlc_hw->band->pi = + wlc_phy_attach(wlc_hw->phy_sh, regs, + wlc_hw->band->bandtype, + wlc->wiphy); + if (wlc_hw->band->pi == NULL) { + wiphy_err(wiphy, "wl%d: brcms_b_attach: wlc_phy_" + "attach failed\n", unit); + err = 17; + goto fail; + } + + wlc_phy_machwcap_set(wlc_hw->band->pi, wlc_hw->machwcap); + + wlc_phy_get_phyversion(wlc_hw->band->pi, &wlc_hw->band->phytype, + &wlc_hw->band->phyrev, + &wlc_hw->band->radioid, + &wlc_hw->band->radiorev); + wlc_hw->band->abgphy_encore = + wlc_phy_get_encore(wlc_hw->band->pi); + wlc->band->abgphy_encore = wlc_phy_get_encore(wlc_hw->band->pi); + wlc_hw->band->core_flags = + wlc_phy_get_coreflags(wlc_hw->band->pi); + + /* verify good phy_type & supported phy revision */ + if (BRCMS_ISNPHY(wlc_hw->band)) { + if (NCONF_HAS(wlc_hw->band->phyrev)) + goto good_phy; + else + goto bad_phy; + } else if (BRCMS_ISLCNPHY(wlc_hw->band)) { + if (LCNCONF_HAS(wlc_hw->band->phyrev)) + goto good_phy; + else + goto bad_phy; + } else { + bad_phy: + wiphy_err(wiphy, "wl%d: brcms_b_attach: unsupported " + "phy type/rev (%d/%d)\n", unit, + wlc_hw->band->phytype, wlc_hw->band->phyrev); + err = 18; + goto fail; + } + + good_phy: + /* + * BMAC_NOTE: wlc->band->pi should not be set below and should + * be done in the high level attach. However we can not make + * that change until all low level access is changed to + * wlc_hw->band->pi. Instead do the wlc->band->pi init below, + * keeping wlc_hw->band->pi as well for incremental update of + * low level fns, and cut over low only init when all fns + * updated. + */ + wlc->band->pi = wlc_hw->band->pi; + wlc->band->phytype = wlc_hw->band->phytype; + wlc->band->phyrev = wlc_hw->band->phyrev; + wlc->band->radioid = wlc_hw->band->radioid; + wlc->band->radiorev = wlc_hw->band->radiorev; + + /* default contention windows size limits */ + wlc_hw->band->CWmin = APHY_CWMIN; + wlc_hw->band->CWmax = PHY_CWMAX; + + if (!brcms_b_attach_dmapio(wlc, j, wme)) { + err = 19; + goto fail; + } + } + + /* disable core to match driver "down" state */ + brcms_c_coredisable(wlc_hw); + + /* Match driver "down" state */ + ai_pci_down(wlc_hw->sih); + + /* register sb interrupt callback functions */ + ai_register_intr_callback(wlc_hw->sih, (void *)brcms_c_wlintrsoff, + (void *)brcms_c_wlintrsrestore, NULL, wlc); + + /* turn off pll and xtal to match driver "down" state */ + brcms_b_xtal(wlc_hw, OFF); + + /* ******************************************************************* + * The hardware is in the DOWN state at this point. D11 core + * or cores are in reset with clocks off, and the board PLLs + * are off if possible. + * + * Beyond this point, wlc->sbclk == false and chip registers + * should not be touched. + ********************************************************************* + */ + + /* init etheraddr state variables */ + macaddr = brcms_c_get_macaddr(wlc_hw); + if (macaddr == NULL) { + wiphy_err(wiphy, "wl%d: brcms_b_attach: macaddr not found\n", + unit); + err = 21; + goto fail; + } + if (!mac_pton(macaddr, wlc_hw->etheraddr) || + is_broadcast_ether_addr(wlc_hw->etheraddr) || + is_zero_ether_addr(wlc_hw->etheraddr)) { + wiphy_err(wiphy, "wl%d: brcms_b_attach: bad macaddr %s\n", + unit, macaddr); + err = 22; + goto fail; + } + + BCMMSG(wlc->wiphy, + "deviceid 0x%x nbands %d board 0x%x macaddr: %s\n", + wlc_hw->deviceid, wlc_hw->_nbands, + wlc_hw->sih->boardtype, macaddr); + + return err; + + fail: + wiphy_err(wiphy, "wl%d: brcms_b_attach: failed with err %d\n", unit, + err); + return err; +} + +static void brcms_c_attach_antgain_init(struct brcms_c_info *wlc) +{ + uint unit; + unit = wlc->pub->unit; + + if ((wlc->band->antgain == -1) && (wlc->pub->sromrev == 1)) { + /* default antenna gain for srom rev 1 is 2 dBm (8 qdbm) */ + wlc->band->antgain = 8; + } else if (wlc->band->antgain == -1) { + wiphy_err(wlc->wiphy, "wl%d: %s: Invalid antennas available in" + " srom, using 2dB\n", unit, __func__); + wlc->band->antgain = 8; + } else { + s8 gain, fract; + /* Older sroms specified gain in whole dbm only. In order + * be able to specify qdbm granularity and remain backward + * compatible the whole dbms are now encoded in only + * low 6 bits and remaining qdbms are encoded in the hi 2 bits. + * 6 bit signed number ranges from -32 - 31. + * + * Examples: + * 0x1 = 1 db, + * 0xc1 = 1.75 db (1 + 3 quarters), + * 0x3f = -1 (-1 + 0 quarters), + * 0x7f = -.75 (-1 + 1 quarters) = -3 qdbm. + * 0xbf = -.50 (-1 + 2 quarters) = -2 qdbm. + */ + gain = wlc->band->antgain & 0x3f; + gain <<= 2; /* Sign extend */ + gain >>= 2; + fract = (wlc->band->antgain & 0xc0) >> 6; + wlc->band->antgain = 4 * gain + fract; + } +} + +static bool brcms_c_attach_stf_ant_init(struct brcms_c_info *wlc) +{ + int aa; + uint unit; + int bandtype; + struct si_pub *sih = wlc->hw->sih; + + unit = wlc->pub->unit; + bandtype = wlc->band->bandtype; + + /* get antennas available */ + if (bandtype == BRCM_BAND_5G) + aa = (s8) getintvar(sih, BRCMS_SROM_AA5G); + else + aa = (s8) getintvar(sih, BRCMS_SROM_AA2G); + + if ((aa < 1) || (aa > 15)) { + wiphy_err(wlc->wiphy, "wl%d: %s: Invalid antennas available in" + " srom (0x%x), using 3\n", unit, __func__, aa); + aa = 3; + } + + /* reset the defaults if we have a single antenna */ + if (aa == 1) { + wlc->stf->ant_rx_ovr = ANT_RX_DIV_FORCE_0; + wlc->stf->txant = ANT_TX_FORCE_0; + } else if (aa == 2) { + wlc->stf->ant_rx_ovr = ANT_RX_DIV_FORCE_1; + wlc->stf->txant = ANT_TX_FORCE_1; + } else { + } + + /* Compute Antenna Gain */ + if (bandtype == BRCM_BAND_5G) + wlc->band->antgain = (s8) getintvar(sih, BRCMS_SROM_AG1); + else + wlc->band->antgain = (s8) getintvar(sih, BRCMS_SROM_AG0); + + brcms_c_attach_antgain_init(wlc); + + return true; +} + +static void brcms_c_bss_default_init(struct brcms_c_info *wlc) +{ + u16 chanspec; + struct brcms_band *band; + struct brcms_bss_info *bi = wlc->default_bss; + + /* init default and target BSS with some sane initial values */ + memset((char *)(bi), 0, sizeof(struct brcms_bss_info)); + bi->beacon_period = BEACON_INTERVAL_DEFAULT; + + /* fill the default channel as the first valid channel + * starting from the 2G channels + */ + chanspec = ch20mhz_chspec(1); + wlc->home_chanspec = bi->chanspec = chanspec; + + /* find the band of our default channel */ + band = wlc->band; + if (wlc->pub->_nbands > 1 && + band->bandunit != chspec_bandunit(chanspec)) + band = wlc->bandstate[OTHERBANDUNIT(wlc)]; + + /* init bss rates to the band specific default rate set */ + brcms_c_rateset_default(&bi->rateset, NULL, band->phytype, + band->bandtype, false, BRCMS_RATE_MASK_FULL, + (bool) (wlc->pub->_n_enab & SUPPORT_11N), + brcms_chspec_bw(chanspec), wlc->stf->txstreams); + + if (wlc->pub->_n_enab & SUPPORT_11N) + bi->flags |= BRCMS_BSS_HT; +} + +static struct brcms_txq_info *brcms_c_txq_alloc(struct brcms_c_info *wlc) +{ + struct brcms_txq_info *qi, *p; + + qi = kzalloc(sizeof(struct brcms_txq_info), GFP_ATOMIC); + if (qi != NULL) { + /* + * Have enough room for control packets along with HI watermark + * Also, add room to txq for total psq packets if all the SCBs + * leave PS mode. The watermark for flowcontrol to OS packets + * will remain the same + */ + brcmu_pktq_init(&qi->q, BRCMS_PREC_COUNT, + 2 * BRCMS_DATAHIWAT + PKTQ_LEN_DEFAULT); + + /* add this queue to the the global list */ + p = wlc->tx_queues; + if (p == NULL) { + wlc->tx_queues = qi; + } else { + while (p->next != NULL) + p = p->next; + p->next = qi; + } + } + return qi; +} + +static void brcms_c_txq_free(struct brcms_c_info *wlc, + struct brcms_txq_info *qi) +{ + struct brcms_txq_info *p; + + if (qi == NULL) + return; + + /* remove the queue from the linked list */ + p = wlc->tx_queues; + if (p == qi) + wlc->tx_queues = p->next; + else { + while (p != NULL && p->next != qi) + p = p->next; + if (p != NULL) + p->next = p->next->next; + } + + kfree(qi); +} + +static void brcms_c_update_mimo_band_bwcap(struct brcms_c_info *wlc, u8 bwcap) +{ + uint i; + struct brcms_band *band; + + for (i = 0; i < wlc->pub->_nbands; i++) { + band = wlc->bandstate[i]; + if (band->bandtype == BRCM_BAND_5G) { + if ((bwcap == BRCMS_N_BW_40ALL) + || (bwcap == BRCMS_N_BW_20IN2G_40IN5G)) + band->mimo_cap_40 = true; + else + band->mimo_cap_40 = false; + } else { + if (bwcap == BRCMS_N_BW_40ALL) + band->mimo_cap_40 = true; + else + band->mimo_cap_40 = false; + } + } +} + +static void brcms_c_timers_deinit(struct brcms_c_info *wlc) +{ + /* free timer state */ + if (wlc->wdtimer) { + brcms_free_timer(wlc->wdtimer); + wlc->wdtimer = NULL; + } + if (wlc->radio_timer) { + brcms_free_timer(wlc->radio_timer); + wlc->radio_timer = NULL; + } +} + +static void brcms_c_detach_module(struct brcms_c_info *wlc) +{ + if (wlc->asi) { + brcms_c_antsel_detach(wlc->asi); + wlc->asi = NULL; + } + + if (wlc->ampdu) { + brcms_c_ampdu_detach(wlc->ampdu); + wlc->ampdu = NULL; + } + + brcms_c_stf_detach(wlc); +} + +/* + * low level detach + */ +static int brcms_b_detach(struct brcms_c_info *wlc) +{ + uint i; + struct brcms_hw_band *band; + struct brcms_hardware *wlc_hw = wlc->hw; + int callbacks; + + callbacks = 0; + + if (wlc_hw->sih) { + /* + * detach interrupt sync mechanism since interrupt is disabled + * and per-port interrupt object may has been freed. this must + * be done before sb core switch + */ + ai_deregister_intr_callback(wlc_hw->sih); + ai_pci_sleep(wlc_hw->sih); + } + + brcms_b_detach_dmapio(wlc_hw); + + band = wlc_hw->band; + for (i = 0; i < wlc_hw->_nbands; i++) { + if (band->pi) { + /* Detach this band's phy */ + wlc_phy_detach(band->pi); + band->pi = NULL; + } + band = wlc_hw->bandstate[OTHERBANDUNIT(wlc)]; + } + + /* Free shared phy state */ + kfree(wlc_hw->phy_sh); + + wlc_phy_shim_detach(wlc_hw->physhim); + + if (wlc_hw->sih) { + ai_detach(wlc_hw->sih); + wlc_hw->sih = NULL; + } + + return callbacks; + +} + +/* + * Return a count of the number of driver callbacks still pending. + * + * General policy is that brcms_c_detach can only dealloc/free software states. + * It can NOT touch hardware registers since the d11core may be in reset and + * clock may not be available. + * One exception is sb register access, which is possible if crystal is turned + * on after "down" state, driver should avoid software timer with the exception + * of radio_monitor. + */ +uint brcms_c_detach(struct brcms_c_info *wlc) +{ + uint callbacks = 0; + + if (wlc == NULL) + return 0; + + BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); + + callbacks += brcms_b_detach(wlc); + + /* delete software timers */ + if (!brcms_c_radio_monitor_stop(wlc)) + callbacks++; + + brcms_c_channel_mgr_detach(wlc->cmi); + + brcms_c_timers_deinit(wlc); + + brcms_c_detach_module(wlc); + + + while (wlc->tx_queues != NULL) + brcms_c_txq_free(wlc, wlc->tx_queues); + + brcms_c_detach_mfree(wlc); + return callbacks; +} + +/* update state that depends on the current value of "ap" */ +static void brcms_c_ap_upd(struct brcms_c_info *wlc) +{ + /* STA-BSS; short capable */ + wlc->PLCPHdr_override = BRCMS_PLCP_SHORT; + + /* fixup mpc */ + wlc->mpc = true; +} + +/* Initialize just the hardware when coming out of POR or S3/S5 system states */ +static void brcms_b_hw_up(struct brcms_hardware *wlc_hw) +{ + if (wlc_hw->wlc->pub->hw_up) + return; + + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + + /* + * Enable pll and xtal, initialize the power control registers, + * and force fastclock for the remainder of brcms_c_up(). + */ + brcms_b_xtal(wlc_hw, ON); + ai_clkctl_init(wlc_hw->sih); + brcms_b_clkctl_clk(wlc_hw, CLK_FAST); + + ai_pci_fixcfg(wlc_hw->sih); + + /* + * AI chip doesn't restore bar0win2 on + * hibernation/resume, need sw fixup + */ + if ((wlc_hw->sih->chip == BCM43224_CHIP_ID) || + (wlc_hw->sih->chip == BCM43225_CHIP_ID)) + wlc_hw->regs = (struct d11regs __iomem *) + ai_setcore(wlc_hw->sih, D11_CORE_ID, 0); + + /* + * Inform phy that a POR reset has occurred so + * it does a complete phy init + */ + wlc_phy_por_inform(wlc_hw->band->pi); + + wlc_hw->ucode_loaded = false; + wlc_hw->wlc->pub->hw_up = true; + + if ((wlc_hw->boardflags & BFL_FEM) + && (wlc_hw->sih->chip == BCM4313_CHIP_ID)) { + if (! + (wlc_hw->boardrev >= 0x1250 + && (wlc_hw->boardflags & BFL_FEM_BT))) + ai_epa_4313war(wlc_hw->sih); + } +} + +static int brcms_b_up_prep(struct brcms_hardware *wlc_hw) +{ + uint coremask; + + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + + /* + * Enable pll and xtal, initialize the power control registers, + * and force fastclock for the remainder of brcms_c_up(). + */ + brcms_b_xtal(wlc_hw, ON); + ai_clkctl_init(wlc_hw->sih); + brcms_b_clkctl_clk(wlc_hw, CLK_FAST); + + /* + * Configure pci/pcmcia here instead of in brcms_c_attach() + * to allow mfg hotswap: down, hotswap (chip power cycle), up. + */ + coremask = (1 << wlc_hw->wlc->core->coreidx); + + ai_pci_setup(wlc_hw->sih, coremask); + + /* + * Need to read the hwradio status here to cover the case where the + * system is loaded with the hw radio disabled. We do not want to + * bring the driver up in this case. + */ + if (brcms_b_radio_read_hwdisabled(wlc_hw)) { + /* put SB PCI in down state again */ + ai_pci_down(wlc_hw->sih); + brcms_b_xtal(wlc_hw, OFF); + return -ENOMEDIUM; + } + + ai_pci_up(wlc_hw->sih); + + /* reset the d11 core */ + brcms_b_corereset(wlc_hw, BRCMS_USE_COREFLAGS); + + return 0; +} + +static int brcms_b_up_finish(struct brcms_hardware *wlc_hw) +{ + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + + wlc_hw->up = true; + wlc_phy_hw_state_upd(wlc_hw->band->pi, true); + + /* FULLY enable dynamic power control and d11 core interrupt */ + brcms_b_clkctl_clk(wlc_hw, CLK_DYNAMIC); + brcms_intrson(wlc_hw->wlc->wl); + return 0; +} + +/* + * Write WME tunable parameters for retransmit/max rate + * from wlc struct to ucode + */ +static void brcms_c_wme_retries_write(struct brcms_c_info *wlc) +{ + int ac; + + /* Need clock to do this */ + if (!wlc->clk) + return; + + for (ac = 0; ac < AC_COUNT; ac++) + brcms_b_write_shm(wlc->hw, M_AC_TXLMT_ADDR(ac), + wlc->wme_retries[ac]); +} + +/* make interface operational */ +int brcms_c_up(struct brcms_c_info *wlc) +{ + BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); + + /* HW is turned off so don't try to access it */ + if (wlc->pub->hw_off || brcms_deviceremoved(wlc)) + return -ENOMEDIUM; + + if (!wlc->pub->hw_up) { + brcms_b_hw_up(wlc->hw); + wlc->pub->hw_up = true; + } + + if ((wlc->pub->boardflags & BFL_FEM) + && (wlc->pub->sih->chip == BCM4313_CHIP_ID)) { + if (wlc->pub->boardrev >= 0x1250 + && (wlc->pub->boardflags & BFL_FEM_BT)) + brcms_b_mhf(wlc->hw, MHF5, MHF5_4313_GPIOCTRL, + MHF5_4313_GPIOCTRL, BRCM_BAND_ALL); + else + brcms_b_mhf(wlc->hw, MHF4, MHF4_EXTPA_ENABLE, + MHF4_EXTPA_ENABLE, BRCM_BAND_ALL); + } + + /* + * Need to read the hwradio status here to cover the case where the + * system is loaded with the hw radio disabled. We do not want to bring + * the driver up in this case. If radio is disabled, abort up, lower + * power, start radio timer and return 0(for NDIS) don't call + * radio_update to avoid looping brcms_c_up. + * + * brcms_b_up_prep() returns either 0 or -BCME_RADIOOFF only + */ + if (!wlc->pub->radio_disabled) { + int status = brcms_b_up_prep(wlc->hw); + if (status == -ENOMEDIUM) { + if (!mboolisset + (wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE)) { + struct brcms_bss_cfg *bsscfg = wlc->bsscfg; + mboolset(wlc->pub->radio_disabled, + WL_RADIO_HW_DISABLE); + + if (bsscfg->enable && bsscfg->BSS) + wiphy_err(wlc->wiphy, "wl%d: up" + ": rfdisable -> " + "bsscfg_disable()\n", + wlc->pub->unit); + } + } + } + + if (wlc->pub->radio_disabled) { + brcms_c_radio_monitor_start(wlc); + return 0; + } + + /* brcms_b_up_prep has done brcms_c_corereset(). so clk is on, set it */ + wlc->clk = true; + + brcms_c_radio_monitor_stop(wlc); + + /* Set EDCF hostflags */ + brcms_b_mhf(wlc->hw, MHF1, MHF1_EDCF, MHF1_EDCF, BRCM_BAND_ALL); + + brcms_init(wlc->wl); + wlc->pub->up = true; + + if (wlc->bandinit_pending) { + brcms_c_suspend_mac_and_wait(wlc); + brcms_c_set_chanspec(wlc, wlc->default_bss->chanspec); + wlc->bandinit_pending = false; + brcms_c_enable_mac(wlc); + } + + brcms_b_up_finish(wlc->hw); + + /* Program the TX wme params with the current settings */ + brcms_c_wme_retries_write(wlc); + + /* start one second watchdog timer */ + brcms_add_timer(wlc->wdtimer, TIMER_INTERVAL_WATCHDOG, true); + wlc->WDarmed = true; + + /* ensure antenna config is up to date */ + brcms_c_stf_phy_txant_upd(wlc); + /* ensure LDPC config is in sync */ + brcms_c_ht_update_ldpc(wlc, wlc->stf->ldpc); + + return 0; +} + +static uint brcms_c_down_del_timer(struct brcms_c_info *wlc) +{ + uint callbacks = 0; + + return callbacks; +} + +static int brcms_b_bmac_down_prep(struct brcms_hardware *wlc_hw) +{ + bool dev_gone; + uint callbacks = 0; + + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + + if (!wlc_hw->up) + return callbacks; + + dev_gone = brcms_deviceremoved(wlc_hw->wlc); + + /* disable interrupts */ + if (dev_gone) + wlc_hw->wlc->macintmask = 0; + else { + /* now disable interrupts */ + brcms_intrsoff(wlc_hw->wlc->wl); + + /* ensure we're running on the pll clock again */ + brcms_b_clkctl_clk(wlc_hw, CLK_FAST); + } + /* down phy at the last of this stage */ + callbacks += wlc_phy_down(wlc_hw->band->pi); + + return callbacks; +} + +static int brcms_b_down_finish(struct brcms_hardware *wlc_hw) +{ + uint callbacks = 0; + bool dev_gone; + + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + + if (!wlc_hw->up) + return callbacks; + + wlc_hw->up = false; + wlc_phy_hw_state_upd(wlc_hw->band->pi, false); + + dev_gone = brcms_deviceremoved(wlc_hw->wlc); + + if (dev_gone) { + wlc_hw->sbclk = false; + wlc_hw->clk = false; + wlc_phy_hw_clk_state_upd(wlc_hw->band->pi, false); + + /* reclaim any posted packets */ + brcms_c_flushqueues(wlc_hw->wlc); + } else { + + /* Reset and disable the core */ + if (ai_iscoreup(wlc_hw->sih)) { + if (R_REG(&wlc_hw->regs->maccontrol) & + MCTL_EN_MAC) + brcms_c_suspend_mac_and_wait(wlc_hw->wlc); + callbacks += brcms_reset(wlc_hw->wlc->wl); + brcms_c_coredisable(wlc_hw); + } + + /* turn off primary xtal and pll */ + if (!wlc_hw->noreset) { + ai_pci_down(wlc_hw->sih); + brcms_b_xtal(wlc_hw, OFF); + } + } + + return callbacks; +} + +/* + * Mark the interface nonoperational, stop the software mechanisms, + * disable the hardware, free any transient buffer state. + * Return a count of the number of driver callbacks still pending. + */ +uint brcms_c_down(struct brcms_c_info *wlc) +{ + + uint callbacks = 0; + int i; + bool dev_gone = false; + struct brcms_txq_info *qi; + + BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); + + /* check if we are already in the going down path */ + if (wlc->going_down) { + wiphy_err(wlc->wiphy, "wl%d: %s: Driver going down so return" + "\n", wlc->pub->unit, __func__); + return 0; + } + if (!wlc->pub->up) + return callbacks; + + /* in between, mpc could try to bring down again.. */ + wlc->going_down = true; + + callbacks += brcms_b_bmac_down_prep(wlc->hw); + + dev_gone = brcms_deviceremoved(wlc); + + /* Call any registered down handlers */ + for (i = 0; i < BRCMS_MAXMODULES; i++) { + if (wlc->modulecb[i].down_fn) + callbacks += + wlc->modulecb[i].down_fn(wlc->modulecb[i].hdl); + } + + /* cancel the watchdog timer */ + if (wlc->WDarmed) { + if (!brcms_del_timer(wlc->wdtimer)) + callbacks++; + wlc->WDarmed = false; + } + /* cancel all other timers */ + callbacks += brcms_c_down_del_timer(wlc); + + wlc->pub->up = false; + + wlc_phy_mute_upd(wlc->band->pi, false, PHY_MUTE_ALL); + + /* clear txq flow control */ + brcms_c_txflowcontrol_reset(wlc); + + /* flush tx queues */ + for (qi = wlc->tx_queues; qi != NULL; qi = qi->next) + brcmu_pktq_flush(&qi->q, true, NULL, NULL); + + callbacks += brcms_b_down_finish(wlc->hw); + + /* brcms_b_down_finish has done brcms_c_coredisable(). so clk is off */ + wlc->clk = false; + + wlc->going_down = false; + return callbacks; +} + +/* Set the current gmode configuration */ +int brcms_c_set_gmode(struct brcms_c_info *wlc, u8 gmode, bool config) +{ + int ret = 0; + uint i; + struct brcms_c_rateset rs; + /* Default to 54g Auto */ + /* Advertise and use shortslot (-1/0/1 Auto/Off/On) */ + s8 shortslot = BRCMS_SHORTSLOT_AUTO; + bool shortslot_restrict = false; /* Restrict association to stations + * that support shortslot + */ + bool ofdm_basic = false; /* Make 6, 12, and 24 basic rates */ + /* Advertise and use short preambles (-1/0/1 Auto/Off/On) */ + int preamble = BRCMS_PLCP_LONG; + bool preamble_restrict = false; /* Restrict association to stations + * that support short preambles + */ + struct brcms_band *band; + + /* if N-support is enabled, allow Gmode set as long as requested + * Gmode is not GMODE_LEGACY_B + */ + if ((wlc->pub->_n_enab & SUPPORT_11N) && gmode == GMODE_LEGACY_B) + return -ENOTSUPP; + + /* verify that we are dealing with 2G band and grab the band pointer */ + if (wlc->band->bandtype == BRCM_BAND_2G) + band = wlc->band; + else if ((wlc->pub->_nbands > 1) && + (wlc->bandstate[OTHERBANDUNIT(wlc)]->bandtype == BRCM_BAND_2G)) + band = wlc->bandstate[OTHERBANDUNIT(wlc)]; + else + return -EINVAL; + + /* Legacy or bust when no OFDM is supported by regulatory */ + if ((brcms_c_channel_locale_flags_in_band(wlc->cmi, band->bandunit) & + BRCMS_NO_OFDM) && (gmode != GMODE_LEGACY_B)) + return -EINVAL; + + /* update configuration value */ + if (config == true) + brcms_c_protection_upd(wlc, BRCMS_PROT_G_USER, gmode); + + /* Clear rateset override */ + memset(&rs, 0, sizeof(struct brcms_c_rateset)); + + switch (gmode) { + case GMODE_LEGACY_B: + shortslot = BRCMS_SHORTSLOT_OFF; + brcms_c_rateset_copy(&gphy_legacy_rates, &rs); + + break; + + case GMODE_LRS: + break; + + case GMODE_AUTO: + /* Accept defaults */ + break; + + case GMODE_ONLY: + ofdm_basic = true; + preamble = BRCMS_PLCP_SHORT; + preamble_restrict = true; + break; + + case GMODE_PERFORMANCE: + shortslot = BRCMS_SHORTSLOT_ON; + shortslot_restrict = true; + ofdm_basic = true; + preamble = BRCMS_PLCP_SHORT; + preamble_restrict = true; + break; + + default: + /* Error */ + wiphy_err(wlc->wiphy, "wl%d: %s: invalid gmode %d\n", + wlc->pub->unit, __func__, gmode); + return -ENOTSUPP; + } + + band->gmode = gmode; + + wlc->shortslot_override = shortslot; + + /* Use the default 11g rateset */ + if (!rs.count) + brcms_c_rateset_copy(&cck_ofdm_rates, &rs); + + if (ofdm_basic) { + for (i = 0; i < rs.count; i++) { + if (rs.rates[i] == BRCM_RATE_6M + || rs.rates[i] == BRCM_RATE_12M + || rs.rates[i] == BRCM_RATE_24M) + rs.rates[i] |= BRCMS_RATE_FLAG; + } + } + + /* Set default bss rateset */ + wlc->default_bss->rateset.count = rs.count; + memcpy(wlc->default_bss->rateset.rates, rs.rates, + sizeof(wlc->default_bss->rateset.rates)); + + return ret; +} + +int brcms_c_set_nmode(struct brcms_c_info *wlc) +{ + uint i; + s32 nmode = AUTO; + + if (wlc->stf->txstreams == WL_11N_3x3) + nmode = WL_11N_3x3; + else + nmode = WL_11N_2x2; + + /* force GMODE_AUTO if NMODE is ON */ + brcms_c_set_gmode(wlc, GMODE_AUTO, true); + if (nmode == WL_11N_3x3) + wlc->pub->_n_enab = SUPPORT_HT; + else + wlc->pub->_n_enab = SUPPORT_11N; + wlc->default_bss->flags |= BRCMS_BSS_HT; + /* add the mcs rates to the default and hw ratesets */ + brcms_c_rateset_mcs_build(&wlc->default_bss->rateset, + wlc->stf->txstreams); + for (i = 0; i < wlc->pub->_nbands; i++) + memcpy(wlc->bandstate[i]->hw_rateset.mcs, + wlc->default_bss->rateset.mcs, MCSSET_LEN); + + return 0; +} + +static int +brcms_c_set_internal_rateset(struct brcms_c_info *wlc, + struct brcms_c_rateset *rs_arg) +{ + struct brcms_c_rateset rs, new; + uint bandunit; + + memcpy(&rs, rs_arg, sizeof(struct brcms_c_rateset)); + + /* check for bad count value */ + if ((rs.count == 0) || (rs.count > BRCMS_NUMRATES)) + return -EINVAL; + + /* try the current band */ + bandunit = wlc->band->bandunit; + memcpy(&new, &rs, sizeof(struct brcms_c_rateset)); + if (brcms_c_rate_hwrs_filter_sort_validate + (&new, &wlc->bandstate[bandunit]->hw_rateset, true, + wlc->stf->txstreams)) + goto good; + + /* try the other band */ + if (brcms_is_mband_unlocked(wlc)) { + bandunit = OTHERBANDUNIT(wlc); + memcpy(&new, &rs, sizeof(struct brcms_c_rateset)); + if (brcms_c_rate_hwrs_filter_sort_validate(&new, + &wlc-> + bandstate[bandunit]-> + hw_rateset, true, + wlc->stf->txstreams)) + goto good; + } + + return -EBADE; + + good: + /* apply new rateset */ + memcpy(&wlc->default_bss->rateset, &new, + sizeof(struct brcms_c_rateset)); + memcpy(&wlc->bandstate[bandunit]->defrateset, &new, + sizeof(struct brcms_c_rateset)); + return 0; +} + +static void brcms_c_ofdm_rateset_war(struct brcms_c_info *wlc) +{ + u8 r; + bool war = false; + + if (wlc->bsscfg->associated) + r = wlc->bsscfg->current_bss->rateset.rates[0]; + else + r = wlc->default_bss->rateset.rates[0]; + + wlc_phy_ofdm_rateset_war(wlc->band->pi, war); +} + +int brcms_c_set_channel(struct brcms_c_info *wlc, u16 channel) +{ + u16 chspec = ch20mhz_chspec(channel); + + if (channel < 0 || channel > MAXCHANNEL) + return -EINVAL; + + if (!brcms_c_valid_chanspec_db(wlc->cmi, chspec)) + return -EINVAL; + + + if (!wlc->pub->up && brcms_is_mband_unlocked(wlc)) { + if (wlc->band->bandunit != chspec_bandunit(chspec)) + wlc->bandinit_pending = true; + else + wlc->bandinit_pending = false; + } + + wlc->default_bss->chanspec = chspec; + /* brcms_c_BSSinit() will sanitize the rateset before + * using it.. */ + if (wlc->pub->up && (wlc_phy_chanspec_get(wlc->band->pi) != chspec)) { + brcms_c_set_home_chanspec(wlc, chspec); + brcms_c_suspend_mac_and_wait(wlc); + brcms_c_set_chanspec(wlc, chspec); + brcms_c_enable_mac(wlc); + } + return 0; +} + +int brcms_c_set_rate_limit(struct brcms_c_info *wlc, u16 srl, u16 lrl) +{ + int ac; + + if (srl < 1 || srl > RETRY_SHORT_MAX || + lrl < 1 || lrl > RETRY_SHORT_MAX) + return -EINVAL; + + wlc->SRL = srl; + wlc->LRL = lrl; + + brcms_b_retrylimit_upd(wlc->hw, wlc->SRL, wlc->LRL); + + for (ac = 0; ac < AC_COUNT; ac++) { + wlc->wme_retries[ac] = SFIELD(wlc->wme_retries[ac], + EDCF_SHORT, wlc->SRL); + wlc->wme_retries[ac] = SFIELD(wlc->wme_retries[ac], + EDCF_LONG, wlc->LRL); + } + brcms_c_wme_retries_write(wlc); + + return 0; +} + +void brcms_c_get_current_rateset(struct brcms_c_info *wlc, + struct brcm_rateset *currs) +{ + struct brcms_c_rateset *rs; + + if (wlc->pub->associated) + rs = &wlc->bsscfg->current_bss->rateset; + else + rs = &wlc->default_bss->rateset; + + /* Copy only legacy rateset section */ + currs->count = rs->count; + memcpy(&currs->rates, &rs->rates, rs->count); +} + +int brcms_c_set_rateset(struct brcms_c_info *wlc, struct brcm_rateset *rs) +{ + struct brcms_c_rateset internal_rs; + int bcmerror; + + if (rs->count > BRCMS_NUMRATES) + return -ENOBUFS; + + memset(&internal_rs, 0, sizeof(struct brcms_c_rateset)); + + /* Copy only legacy rateset section */ + internal_rs.count = rs->count; + memcpy(&internal_rs.rates, &rs->rates, internal_rs.count); + + /* merge rateset coming in with the current mcsset */ + if (wlc->pub->_n_enab & SUPPORT_11N) { + struct brcms_bss_info *mcsset_bss; + if (wlc->bsscfg->associated) + mcsset_bss = wlc->bsscfg->current_bss; + else + mcsset_bss = wlc->default_bss; + memcpy(internal_rs.mcs, &mcsset_bss->rateset.mcs[0], + MCSSET_LEN); + } + + bcmerror = brcms_c_set_internal_rateset(wlc, &internal_rs); + if (!bcmerror) + brcms_c_ofdm_rateset_war(wlc); + + return bcmerror; +} + +int brcms_c_set_beacon_period(struct brcms_c_info *wlc, u16 period) +{ + if (period < DOT11_MIN_BEACON_PERIOD || + period > DOT11_MAX_BEACON_PERIOD) + return -EINVAL; + + wlc->default_bss->beacon_period = period; + return 0; +} + +u16 brcms_c_get_phy_type(struct brcms_c_info *wlc, int phyidx) +{ + return wlc->band->phytype; +} + +void brcms_c_set_shortslot_override(struct brcms_c_info *wlc, s8 sslot_override) +{ + wlc->shortslot_override = sslot_override; + + /* + * shortslot is an 11g feature, so no more work if we are + * currently on the 5G band + */ + if (wlc->band->bandtype == BRCM_BAND_5G) + return; + + if (wlc->pub->up && wlc->pub->associated) { + /* let watchdog or beacon processing update shortslot */ + } else if (wlc->pub->up) { + /* unassociated shortslot is off */ + brcms_c_switch_shortslot(wlc, false); + } else { + /* driver is down, so just update the brcms_c_info + * value */ + if (wlc->shortslot_override == BRCMS_SHORTSLOT_AUTO) + wlc->shortslot = false; + else + wlc->shortslot = + (wlc->shortslot_override == + BRCMS_SHORTSLOT_ON); + } +} + +/* + * register watchdog and down handlers. + */ +int brcms_c_module_register(struct brcms_pub *pub, + const char *name, struct brcms_info *hdl, + int (*d_fn)(void *handle)) +{ + struct brcms_c_info *wlc = (struct brcms_c_info *) pub->wlc; + int i; + + /* find an empty entry and just add, no duplication check! */ + for (i = 0; i < BRCMS_MAXMODULES; i++) { + if (wlc->modulecb[i].name[0] == '\0') { + strncpy(wlc->modulecb[i].name, name, + sizeof(wlc->modulecb[i].name) - 1); + wlc->modulecb[i].hdl = hdl; + wlc->modulecb[i].down_fn = d_fn; + return 0; + } + } + + return -ENOSR; +} + +/* unregister module callbacks */ +int brcms_c_module_unregister(struct brcms_pub *pub, const char *name, + struct brcms_info *hdl) +{ + struct brcms_c_info *wlc = (struct brcms_c_info *) pub->wlc; + int i; + + if (wlc == NULL) + return -ENODATA; + + for (i = 0; i < BRCMS_MAXMODULES; i++) { + if (!strcmp(wlc->modulecb[i].name, name) && + (wlc->modulecb[i].hdl == hdl)) { + memset(&wlc->modulecb[i], 0, sizeof(struct modulecb)); + return 0; + } + } + + /* table not found! */ + return -ENODATA; +} + +#ifdef BCMDBG +static const char * const supr_reason[] = { + "None", "PMQ Entry", "Flush request", + "Previous frag failure", "Channel mismatch", + "Lifetime Expiry", "Underflow" +}; + +static void brcms_c_print_txs_status(u16 s) +{ + printk(KERN_DEBUG "[15:12] %d frame attempts\n", + (s & TX_STATUS_FRM_RTX_MASK) >> TX_STATUS_FRM_RTX_SHIFT); + printk(KERN_DEBUG " [11:8] %d rts attempts\n", + (s & TX_STATUS_RTS_RTX_MASK) >> TX_STATUS_RTS_RTX_SHIFT); + printk(KERN_DEBUG " [7] %d PM mode indicated\n", + ((s & TX_STATUS_PMINDCTD) ? 1 : 0)); + printk(KERN_DEBUG " [6] %d intermediate status\n", + ((s & TX_STATUS_INTERMEDIATE) ? 1 : 0)); + printk(KERN_DEBUG " [5] %d AMPDU\n", + (s & TX_STATUS_AMPDU) ? 1 : 0); + printk(KERN_DEBUG " [4:2] %d Frame Suppressed Reason (%s)\n", + ((s & TX_STATUS_SUPR_MASK) >> TX_STATUS_SUPR_SHIFT), + supr_reason[(s & TX_STATUS_SUPR_MASK) >> TX_STATUS_SUPR_SHIFT]); + printk(KERN_DEBUG " [1] %d acked\n", + ((s & TX_STATUS_ACK_RCV) ? 1 : 0)); +} +#endif /* BCMDBG */ + +void brcms_c_print_txstatus(struct tx_status *txs) +{ +#if defined(BCMDBG) + u16 s = txs->status; + u16 ackphyrxsh = txs->ackphyrxsh; + + printk(KERN_DEBUG "\ntxpkt (MPDU) Complete\n"); + + printk(KERN_DEBUG "FrameID: %04x ", txs->frameid); + printk(KERN_DEBUG "TxStatus: %04x", s); + printk(KERN_DEBUG "\n"); + + brcms_c_print_txs_status(s); + + printk(KERN_DEBUG "LastTxTime: %04x ", txs->lasttxtime); + printk(KERN_DEBUG "Seq: %04x ", txs->sequence); + printk(KERN_DEBUG "PHYTxStatus: %04x ", txs->phyerr); + printk(KERN_DEBUG "RxAckRSSI: %04x ", + (ackphyrxsh & PRXS1_JSSI_MASK) >> PRXS1_JSSI_SHIFT); + printk(KERN_DEBUG "RxAckSQ: %04x", + (ackphyrxsh & PRXS1_SQ_MASK) >> PRXS1_SQ_SHIFT); + printk(KERN_DEBUG "\n"); +#endif /* defined(BCMDBG) */ +} + +bool brcms_c_chipmatch(u16 vendor, u16 device) +{ + if (vendor != PCI_VENDOR_ID_BROADCOM) { + pr_err("chipmatch: unknown vendor id %04x\n", vendor); + return false; + } + + if (device == BCM43224_D11N_ID_VEN1) + return true; + if ((device == BCM43224_D11N_ID) || (device == BCM43225_D11N2G_ID)) + return true; + if (device == BCM4313_D11N2G_ID) + return true; + if ((device == BCM43236_D11N_ID) || (device == BCM43236_D11N2G_ID)) + return true; + + pr_err("chipmatch: unknown device id %04x\n", device); + return false; +} + +#if defined(BCMDBG) +void brcms_c_print_txdesc(struct d11txh *txh) +{ + u16 mtcl = le16_to_cpu(txh->MacTxControlLow); + u16 mtch = le16_to_cpu(txh->MacTxControlHigh); + u16 mfc = le16_to_cpu(txh->MacFrameControl); + u16 tfest = le16_to_cpu(txh->TxFesTimeNormal); + u16 ptcw = le16_to_cpu(txh->PhyTxControlWord); + u16 ptcw_1 = le16_to_cpu(txh->PhyTxControlWord_1); + u16 ptcw_1_Fbr = le16_to_cpu(txh->PhyTxControlWord_1_Fbr); + u16 ptcw_1_Rts = le16_to_cpu(txh->PhyTxControlWord_1_Rts); + u16 ptcw_1_FbrRts = le16_to_cpu(txh->PhyTxControlWord_1_FbrRts); + u16 mainrates = le16_to_cpu(txh->MainRates); + u16 xtraft = le16_to_cpu(txh->XtraFrameTypes); + u8 *iv = txh->IV; + u8 *ra = txh->TxFrameRA; + u16 tfestfb = le16_to_cpu(txh->TxFesTimeFallback); + u8 *rtspfb = txh->RTSPLCPFallback; + u16 rtsdfb = le16_to_cpu(txh->RTSDurFallback); + u8 *fragpfb = txh->FragPLCPFallback; + u16 fragdfb = le16_to_cpu(txh->FragDurFallback); + u16 mmodelen = le16_to_cpu(txh->MModeLen); + u16 mmodefbrlen = le16_to_cpu(txh->MModeFbrLen); + u16 tfid = le16_to_cpu(txh->TxFrameID); + u16 txs = le16_to_cpu(txh->TxStatus); + u16 mnmpdu = le16_to_cpu(txh->MaxNMpdus); + u16 mabyte = le16_to_cpu(txh->MaxABytes_MRT); + u16 mabyte_f = le16_to_cpu(txh->MaxABytes_FBR); + u16 mmbyte = le16_to_cpu(txh->MinMBytes); + + u8 *rtsph = txh->RTSPhyHeader; + struct ieee80211_rts rts = txh->rts_frame; + char hexbuf[256]; + + /* add plcp header along with txh descriptor */ + printk(KERN_DEBUG "Raw TxDesc + plcp header:\n"); + print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, + txh, sizeof(struct d11txh) + 48); + + printk(KERN_DEBUG "TxCtlLow: %04x ", mtcl); + printk(KERN_DEBUG "TxCtlHigh: %04x ", mtch); + printk(KERN_DEBUG "FC: %04x ", mfc); + printk(KERN_DEBUG "FES Time: %04x\n", tfest); + printk(KERN_DEBUG "PhyCtl: %04x%s ", ptcw, + (ptcw & PHY_TXC_SHORT_HDR) ? " short" : ""); + printk(KERN_DEBUG "PhyCtl_1: %04x ", ptcw_1); + printk(KERN_DEBUG "PhyCtl_1_Fbr: %04x\n", ptcw_1_Fbr); + printk(KERN_DEBUG "PhyCtl_1_Rts: %04x ", ptcw_1_Rts); + printk(KERN_DEBUG "PhyCtl_1_Fbr_Rts: %04x\n", ptcw_1_FbrRts); + printk(KERN_DEBUG "MainRates: %04x ", mainrates); + printk(KERN_DEBUG "XtraFrameTypes: %04x ", xtraft); + printk(KERN_DEBUG "\n"); + + brcmu_format_hex(hexbuf, iv, sizeof(txh->IV)); + printk(KERN_DEBUG "SecIV: %s\n", hexbuf); + brcmu_format_hex(hexbuf, ra, sizeof(txh->TxFrameRA)); + printk(KERN_DEBUG "RA: %s\n", hexbuf); + + printk(KERN_DEBUG "Fb FES Time: %04x ", tfestfb); + brcmu_format_hex(hexbuf, rtspfb, sizeof(txh->RTSPLCPFallback)); + printk(KERN_DEBUG "RTS PLCP: %s ", hexbuf); + printk(KERN_DEBUG "RTS DUR: %04x ", rtsdfb); + brcmu_format_hex(hexbuf, fragpfb, sizeof(txh->FragPLCPFallback)); + printk(KERN_DEBUG "PLCP: %s ", hexbuf); + printk(KERN_DEBUG "DUR: %04x", fragdfb); + printk(KERN_DEBUG "\n"); + + printk(KERN_DEBUG "MModeLen: %04x ", mmodelen); + printk(KERN_DEBUG "MModeFbrLen: %04x\n", mmodefbrlen); + + printk(KERN_DEBUG "FrameID: %04x\n", tfid); + printk(KERN_DEBUG "TxStatus: %04x\n", txs); + + printk(KERN_DEBUG "MaxNumMpdu: %04x\n", mnmpdu); + printk(KERN_DEBUG "MaxAggbyte: %04x\n", mabyte); + printk(KERN_DEBUG "MaxAggbyte_fb: %04x\n", mabyte_f); + printk(KERN_DEBUG "MinByte: %04x\n", mmbyte); + + brcmu_format_hex(hexbuf, rtsph, sizeof(txh->RTSPhyHeader)); + printk(KERN_DEBUG "RTS PLCP: %s ", hexbuf); + brcmu_format_hex(hexbuf, (u8 *) &rts, sizeof(txh->rts_frame)); + printk(KERN_DEBUG "RTS Frame: %s", hexbuf); + printk(KERN_DEBUG "\n"); +} +#endif /* defined(BCMDBG) */ + +#if defined(BCMDBG) +int +brcms_c_format_flags(const struct brcms_c_bit_desc *bd, u32 flags, char *buf, + int len) +{ + int i; + char *p = buf; + char hexstr[16]; + int slen = 0, nlen = 0; + u32 bit; + const char *name; + + if (len < 2 || !buf) + return 0; + + buf[0] = '\0'; + + for (i = 0; flags != 0; i++) { + bit = bd[i].bit; + name = bd[i].name; + if (bit == 0 && flags != 0) { + /* print any unnamed bits */ + snprintf(hexstr, 16, "0x%X", flags); + name = hexstr; + flags = 0; /* exit loop */ + } else if ((flags & bit) == 0) + continue; + flags &= ~bit; + nlen = strlen(name); + slen += nlen; + /* count btwn flag space */ + if (flags != 0) + slen += 1; + /* need NULL char as well */ + if (len <= slen) + break; + /* copy NULL char but don't count it */ + strncpy(p, name, nlen + 1); + p += nlen; + /* copy btwn flag space and NULL char */ + if (flags != 0) + p += snprintf(p, 2, " "); + len -= slen; + } + + /* indicate the str was too short */ + if (flags != 0) { + if (len < 2) + p -= 2 - len; /* overwrite last char */ + p += snprintf(p, 2, ">"); + } + + return (int)(p - buf); +} +#endif /* defined(BCMDBG) */ + +#if defined(BCMDBG) +void brcms_c_print_rxh(struct d11rxhdr *rxh) +{ + u16 len = rxh->RxFrameSize; + u16 phystatus_0 = rxh->PhyRxStatus_0; + u16 phystatus_1 = rxh->PhyRxStatus_1; + u16 phystatus_2 = rxh->PhyRxStatus_2; + u16 phystatus_3 = rxh->PhyRxStatus_3; + u16 macstatus1 = rxh->RxStatus1; + u16 macstatus2 = rxh->RxStatus2; + char flagstr[64]; + char lenbuf[20]; + static const struct brcms_c_bit_desc macstat_flags[] = { + {RXS_FCSERR, "FCSErr"}, + {RXS_RESPFRAMETX, "Reply"}, + {RXS_PBPRES, "PADDING"}, + {RXS_DECATMPT, "DeCr"}, + {RXS_DECERR, "DeCrErr"}, + {RXS_BCNSENT, "Bcn"}, + {0, NULL} + }; + + printk(KERN_DEBUG "Raw RxDesc:\n"); + print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, rxh, + sizeof(struct d11rxhdr)); + + brcms_c_format_flags(macstat_flags, macstatus1, flagstr, 64); + + snprintf(lenbuf, sizeof(lenbuf), "0x%x", len); + + printk(KERN_DEBUG "RxFrameSize: %6s (%d)%s\n", lenbuf, len, + (rxh->PhyRxStatus_0 & PRXS0_SHORTH) ? " short preamble" : ""); + printk(KERN_DEBUG "RxPHYStatus: %04x %04x %04x %04x\n", + phystatus_0, phystatus_1, phystatus_2, phystatus_3); + printk(KERN_DEBUG "RxMACStatus: %x %s\n", macstatus1, flagstr); + printk(KERN_DEBUG "RXMACaggtype: %x\n", + (macstatus2 & RXS_AGGTYPE_MASK)); + printk(KERN_DEBUG "RxTSFTime: %04x\n", rxh->RxTSFTime); +} +#endif /* defined(BCMDBG) */ + +u16 brcms_b_rate_shm_offset(struct brcms_hardware *wlc_hw, u8 rate) +{ + u16 table_ptr; + u8 phy_rate, index; + + /* get the phy specific rate encoding for the PLCP SIGNAL field */ + if (is_ofdm_rate(rate)) + table_ptr = M_RT_DIRMAP_A; + else + table_ptr = M_RT_DIRMAP_B; + + /* for a given rate, the LS-nibble of the PLCP SIGNAL field is + * the index into the rate table. + */ + phy_rate = rate_info[rate] & BRCMS_RATE_MASK; + index = phy_rate & 0xf; + + /* Find the SHM pointer to the rate table entry by looking in the + * Direct-map Table + */ + return 2 * brcms_b_read_shm(wlc_hw, table_ptr + (index * 2)); +} + +static bool +brcms_c_prec_enq_head(struct brcms_c_info *wlc, struct pktq *q, + struct sk_buff *pkt, int prec, bool head) +{ + struct sk_buff *p; + int eprec = -1; /* precedence to evict from */ + + /* Determine precedence from which to evict packet, if any */ + if (pktq_pfull(q, prec)) + eprec = prec; + else if (pktq_full(q)) { + p = brcmu_pktq_peek_tail(q, &eprec); + if (eprec > prec) { + wiphy_err(wlc->wiphy, "%s: Failing: eprec %d > prec %d" + "\n", __func__, eprec, prec); + return false; + } + } + + /* Evict if needed */ + if (eprec >= 0) { + bool discard_oldest; + + discard_oldest = ac_bitmap_tst(0, eprec); + + /* Refuse newer packet unless configured to discard oldest */ + if (eprec == prec && !discard_oldest) { + wiphy_err(wlc->wiphy, "%s: No where to go, prec == %d" + "\n", __func__, prec); + return false; + } + + /* Evict packet according to discard policy */ + p = discard_oldest ? brcmu_pktq_pdeq(q, eprec) : + brcmu_pktq_pdeq_tail(q, eprec); + brcmu_pkt_buf_free_skb(p); + } + + /* Enqueue */ + if (head) + p = brcmu_pktq_penq_head(q, prec, pkt); + else + p = brcmu_pktq_penq(q, prec, pkt); + + return true; +} + +/* + * Attempts to queue a packet onto a multiple-precedence queue, + * if necessary evicting a lower precedence packet from the queue. + * + * 'prec' is the precedence number that has already been mapped + * from the packet priority. + * + * Returns true if packet consumed (queued), false if not. + */ +static bool brcms_c_prec_enq(struct brcms_c_info *wlc, struct pktq *q, + struct sk_buff *pkt, int prec) +{ + return brcms_c_prec_enq_head(wlc, q, pkt, prec, false); +} + +void brcms_c_txq_enq(struct brcms_c_info *wlc, struct scb *scb, + struct sk_buff *sdu, uint prec) +{ + struct brcms_txq_info *qi = wlc->pkt_queue; /* Check me */ + struct pktq *q = &qi->q; + int prio; + + prio = sdu->priority; + + if (!brcms_c_prec_enq(wlc, q, sdu, prec)) { + /* + * we might hit this condtion in case + * packet flooding from mac80211 stack + */ + brcmu_pkt_buf_free_skb(sdu); + } +} + +/* + * bcmc_fid_generate: + * Generate frame ID for a BCMC packet. The frag field is not used + * for MC frames so is used as part of the sequence number. + */ +static inline u16 +bcmc_fid_generate(struct brcms_c_info *wlc, struct brcms_bss_cfg *bsscfg, + struct d11txh *txh) +{ + u16 frameid; + + frameid = le16_to_cpu(txh->TxFrameID) & ~(TXFID_SEQ_MASK | + TXFID_QUEUE_MASK); + frameid |= + (((wlc-> + mc_fid_counter++) << TXFID_SEQ_SHIFT) & TXFID_SEQ_MASK) | + TX_BCMC_FIFO; + + return frameid; +} + +static uint +brcms_c_calc_ack_time(struct brcms_c_info *wlc, u32 rspec, + u8 preamble_type) +{ + uint dur = 0; + + BCMMSG(wlc->wiphy, "wl%d: rspec 0x%x, preamble_type %d\n", + wlc->pub->unit, rspec, preamble_type); + /* + * Spec 9.6: ack rate is the highest rate in BSSBasicRateSet that + * is less than or equal to the rate of the immediately previous + * frame in the FES + */ + rspec = brcms_basic_rate(wlc, rspec); + /* ACK frame len == 14 == 2(fc) + 2(dur) + 6(ra) + 4(fcs) */ + dur = + brcms_c_calc_frame_time(wlc, rspec, preamble_type, + (DOT11_ACK_LEN + FCS_LEN)); + return dur; +} + +static uint +brcms_c_calc_cts_time(struct brcms_c_info *wlc, u32 rspec, + u8 preamble_type) +{ + BCMMSG(wlc->wiphy, "wl%d: ratespec 0x%x, preamble_type %d\n", + wlc->pub->unit, rspec, preamble_type); + return brcms_c_calc_ack_time(wlc, rspec, preamble_type); +} + +static uint +brcms_c_calc_ba_time(struct brcms_c_info *wlc, u32 rspec, + u8 preamble_type) +{ + BCMMSG(wlc->wiphy, "wl%d: rspec 0x%x, " + "preamble_type %d\n", wlc->pub->unit, rspec, preamble_type); + /* + * Spec 9.6: ack rate is the highest rate in BSSBasicRateSet that + * is less than or equal to the rate of the immediately previous + * frame in the FES + */ + rspec = brcms_basic_rate(wlc, rspec); + /* BA len == 32 == 16(ctl hdr) + 4(ba len) + 8(bitmap) + 4(fcs) */ + return brcms_c_calc_frame_time(wlc, rspec, preamble_type, + (DOT11_BA_LEN + DOT11_BA_BITMAP_LEN + + FCS_LEN)); +} + +/* brcms_c_compute_frame_dur() + * + * Calculate the 802.11 MAC header DUR field for MPDU + * DUR for a single frame = 1 SIFS + 1 ACK + * DUR for a frame with following frags = 3 SIFS + 2 ACK + next frag time + * + * rate MPDU rate in unit of 500kbps + * next_frag_len next MPDU length in bytes + * preamble_type use short/GF or long/MM PLCP header + */ +static u16 +brcms_c_compute_frame_dur(struct brcms_c_info *wlc, u32 rate, + u8 preamble_type, uint next_frag_len) +{ + u16 dur, sifs; + + sifs = get_sifs(wlc->band); + + dur = sifs; + dur += (u16) brcms_c_calc_ack_time(wlc, rate, preamble_type); + + if (next_frag_len) { + /* Double the current DUR to get 2 SIFS + 2 ACKs */ + dur *= 2; + /* add another SIFS and the frag time */ + dur += sifs; + dur += + (u16) brcms_c_calc_frame_time(wlc, rate, preamble_type, + next_frag_len); + } + return dur; +} + +/* The opposite of brcms_c_calc_frame_time */ +static uint +brcms_c_calc_frame_len(struct brcms_c_info *wlc, u32 ratespec, + u8 preamble_type, uint dur) +{ + uint nsyms, mac_len, Ndps, kNdps; + uint rate = rspec2rate(ratespec); + + BCMMSG(wlc->wiphy, "wl%d: rspec 0x%x, preamble_type %d, dur %d\n", + wlc->pub->unit, ratespec, preamble_type, dur); + + if (is_mcs_rate(ratespec)) { + uint mcs = ratespec & RSPEC_RATE_MASK; + int tot_streams = mcs_2_txstreams(mcs) + rspec_stc(ratespec); + dur -= PREN_PREAMBLE + (tot_streams * PREN_PREAMBLE_EXT); + /* payload calculation matches that of regular ofdm */ + if (wlc->band->bandtype == BRCM_BAND_2G) + dur -= DOT11_OFDM_SIGNAL_EXTENSION; + /* kNdbps = kbps * 4 */ + kNdps = mcs_2_rate(mcs, rspec_is40mhz(ratespec), + rspec_issgi(ratespec)) * 4; + nsyms = dur / APHY_SYMBOL_TIME; + mac_len = + ((nsyms * kNdps) - + ((APHY_SERVICE_NBITS + APHY_TAIL_NBITS) * 1000)) / 8000; + } else if (is_ofdm_rate(ratespec)) { + dur -= APHY_PREAMBLE_TIME; + dur -= APHY_SIGNAL_TIME; + /* Ndbps = Mbps * 4 = rate(500Kbps) * 2 */ + Ndps = rate * 2; + nsyms = dur / APHY_SYMBOL_TIME; + mac_len = + ((nsyms * Ndps) - + (APHY_SERVICE_NBITS + APHY_TAIL_NBITS)) / 8; + } else { + if (preamble_type & BRCMS_SHORT_PREAMBLE) + dur -= BPHY_PLCP_SHORT_TIME; + else + dur -= BPHY_PLCP_TIME; + mac_len = dur * rate; + /* divide out factor of 2 in rate (1/2 mbps) */ + mac_len = mac_len / 8 / 2; + } + return mac_len; +} + +/* + * Return true if the specified rate is supported by the specified band. + * BRCM_BAND_AUTO indicates the current band. + */ +static bool brcms_c_valid_rate(struct brcms_c_info *wlc, u32 rspec, int band, + bool verbose) +{ + struct brcms_c_rateset *hw_rateset; + uint i; + + if ((band == BRCM_BAND_AUTO) || (band == wlc->band->bandtype)) + hw_rateset = &wlc->band->hw_rateset; + else if (wlc->pub->_nbands > 1) + hw_rateset = &wlc->bandstate[OTHERBANDUNIT(wlc)]->hw_rateset; + else + /* other band specified and we are a single band device */ + return false; + + /* check if this is a mimo rate */ + if (is_mcs_rate(rspec)) { + if ((rspec & RSPEC_RATE_MASK) >= MCS_TABLE_SIZE) + goto error; + + return isset(hw_rateset->mcs, (rspec & RSPEC_RATE_MASK)); + } + + for (i = 0; i < hw_rateset->count; i++) + if (hw_rateset->rates[i] == rspec2rate(rspec)) + return true; + error: + if (verbose) + wiphy_err(wlc->wiphy, "wl%d: valid_rate: rate spec 0x%x " + "not in hw_rateset\n", wlc->pub->unit, rspec); + + return false; +} + +static u32 +mac80211_wlc_set_nrate(struct brcms_c_info *wlc, struct brcms_band *cur_band, + u32 int_val) +{ + u8 stf = (int_val & NRATE_STF_MASK) >> NRATE_STF_SHIFT; + u8 rate = int_val & NRATE_RATE_MASK; + u32 rspec; + bool ismcs = ((int_val & NRATE_MCS_INUSE) == NRATE_MCS_INUSE); + bool issgi = ((int_val & NRATE_SGI_MASK) >> NRATE_SGI_SHIFT); + bool override_mcs_only = ((int_val & NRATE_OVERRIDE_MCS_ONLY) + == NRATE_OVERRIDE_MCS_ONLY); + int bcmerror = 0; + + if (!ismcs) + return (u32) rate; + + /* validate the combination of rate/mcs/stf is allowed */ + if ((wlc->pub->_n_enab & SUPPORT_11N) && ismcs) { + /* mcs only allowed when nmode */ + if (stf > PHY_TXC1_MODE_SDM) { + wiphy_err(wlc->wiphy, "wl%d: %s: Invalid stf\n", + wlc->pub->unit, __func__); + bcmerror = -EINVAL; + goto done; + } + + /* mcs 32 is a special case, DUP mode 40 only */ + if (rate == 32) { + if (!CHSPEC_IS40(wlc->home_chanspec) || + ((stf != PHY_TXC1_MODE_SISO) + && (stf != PHY_TXC1_MODE_CDD))) { + wiphy_err(wlc->wiphy, "wl%d: %s: Invalid mcs " + "32\n", wlc->pub->unit, __func__); + bcmerror = -EINVAL; + goto done; + } + /* mcs > 7 must use stf SDM */ + } else if (rate > HIGHEST_SINGLE_STREAM_MCS) { + /* mcs > 7 must use stf SDM */ + if (stf != PHY_TXC1_MODE_SDM) { + BCMMSG(wlc->wiphy, "wl%d: enabling " + "SDM mode for mcs %d\n", + wlc->pub->unit, rate); + stf = PHY_TXC1_MODE_SDM; + } + } else { + /* + * MCS 0-7 may use SISO, CDD, and for + * phy_rev >= 3 STBC + */ + if ((stf > PHY_TXC1_MODE_STBC) || + (!BRCMS_STBC_CAP_PHY(wlc) + && (stf == PHY_TXC1_MODE_STBC))) { + wiphy_err(wlc->wiphy, "wl%d: %s: Invalid STBC" + "\n", wlc->pub->unit, __func__); + bcmerror = -EINVAL; + goto done; + } + } + } else if (is_ofdm_rate(rate)) { + if ((stf != PHY_TXC1_MODE_CDD) && (stf != PHY_TXC1_MODE_SISO)) { + wiphy_err(wlc->wiphy, "wl%d: %s: Invalid OFDM\n", + wlc->pub->unit, __func__); + bcmerror = -EINVAL; + goto done; + } + } else if (is_cck_rate(rate)) { + if ((cur_band->bandtype != BRCM_BAND_2G) + || (stf != PHY_TXC1_MODE_SISO)) { + wiphy_err(wlc->wiphy, "wl%d: %s: Invalid CCK\n", + wlc->pub->unit, __func__); + bcmerror = -EINVAL; + goto done; + } + } else { + wiphy_err(wlc->wiphy, "wl%d: %s: Unknown rate type\n", + wlc->pub->unit, __func__); + bcmerror = -EINVAL; + goto done; + } + /* make sure multiple antennae are available for non-siso rates */ + if ((stf != PHY_TXC1_MODE_SISO) && (wlc->stf->txstreams == 1)) { + wiphy_err(wlc->wiphy, "wl%d: %s: SISO antenna but !SISO " + "request\n", wlc->pub->unit, __func__); + bcmerror = -EINVAL; + goto done; + } + + rspec = rate; + if (ismcs) { + rspec |= RSPEC_MIMORATE; + /* For STBC populate the STC field of the ratespec */ + if (stf == PHY_TXC1_MODE_STBC) { + u8 stc; + stc = 1; /* Nss for single stream is always 1 */ + rspec |= (stc << RSPEC_STC_SHIFT); + } + } + + rspec |= (stf << RSPEC_STF_SHIFT); + + if (override_mcs_only) + rspec |= RSPEC_OVERRIDE_MCS_ONLY; + + if (issgi) + rspec |= RSPEC_SHORT_GI; + + if ((rate != 0) + && !brcms_c_valid_rate(wlc, rspec, cur_band->bandtype, true)) + return rate; + + return rspec; +done: + return rate; +} + +/* + * Compute PLCP, but only requires actual rate and length of pkt. + * Rate is given in the driver standard multiple of 500 kbps. + * le is set for 11 Mbps rate if necessary. + * Broken out for PRQ. + */ + +static void brcms_c_cck_plcp_set(struct brcms_c_info *wlc, int rate_500, + uint length, u8 *plcp) +{ + u16 usec = 0; + u8 le = 0; + + switch (rate_500) { + case BRCM_RATE_1M: + usec = length << 3; + break; + case BRCM_RATE_2M: + usec = length << 2; + break; + case BRCM_RATE_5M5: + usec = (length << 4) / 11; + if ((length << 4) - (usec * 11) > 0) + usec++; + break; + case BRCM_RATE_11M: + usec = (length << 3) / 11; + if ((length << 3) - (usec * 11) > 0) { + usec++; + if ((usec * 11) - (length << 3) >= 8) + le = D11B_PLCP_SIGNAL_LE; + } + break; + + default: + wiphy_err(wlc->wiphy, + "brcms_c_cck_plcp_set: unsupported rate %d\n", + rate_500); + rate_500 = BRCM_RATE_1M; + usec = length << 3; + break; + } + /* PLCP signal byte */ + plcp[0] = rate_500 * 5; /* r (500kbps) * 5 == r (100kbps) */ + /* PLCP service byte */ + plcp[1] = (u8) (le | D11B_PLCP_SIGNAL_LOCKED); + /* PLCP length u16, little endian */ + plcp[2] = usec & 0xff; + plcp[3] = (usec >> 8) & 0xff; + /* PLCP CRC16 */ + plcp[4] = 0; + plcp[5] = 0; +} + +/* Rate: 802.11 rate code, length: PSDU length in octets */ +static void brcms_c_compute_mimo_plcp(u32 rspec, uint length, u8 *plcp) +{ + u8 mcs = (u8) (rspec & RSPEC_RATE_MASK); + plcp[0] = mcs; + if (rspec_is40mhz(rspec) || (mcs == 32)) + plcp[0] |= MIMO_PLCP_40MHZ; + BRCMS_SET_MIMO_PLCP_LEN(plcp, length); + plcp[3] = rspec_mimoplcp3(rspec); /* rspec already holds this byte */ + plcp[3] |= 0x7; /* set smoothing, not sounding ppdu & reserved */ + plcp[4] = 0; /* number of extension spatial streams bit 0 & 1 */ + plcp[5] = 0; +} + +/* Rate: 802.11 rate code, length: PSDU length in octets */ +static void +brcms_c_compute_ofdm_plcp(u32 rspec, u32 length, u8 *plcp) +{ + u8 rate_signal; + u32 tmp = 0; + int rate = rspec2rate(rspec); + + /* + * encode rate per 802.11a-1999 sec 17.3.4.1, with lsb + * transmitted first + */ + rate_signal = rate_info[rate] & BRCMS_RATE_MASK; + memset(plcp, 0, D11_PHY_HDR_LEN); + D11A_PHY_HDR_SRATE((struct ofdm_phy_hdr *) plcp, rate_signal); + + tmp = (length & 0xfff) << 5; + plcp[2] |= (tmp >> 16) & 0xff; + plcp[1] |= (tmp >> 8) & 0xff; + plcp[0] |= tmp & 0xff; +} + +/* Rate: 802.11 rate code, length: PSDU length in octets */ +static void brcms_c_compute_cck_plcp(struct brcms_c_info *wlc, u32 rspec, + uint length, u8 *plcp) +{ + int rate = rspec2rate(rspec); + + brcms_c_cck_plcp_set(wlc, rate, length, plcp); +} + +static void +brcms_c_compute_plcp(struct brcms_c_info *wlc, u32 rspec, + uint length, u8 *plcp) +{ + if (is_mcs_rate(rspec)) + brcms_c_compute_mimo_plcp(rspec, length, plcp); + else if (is_ofdm_rate(rspec)) + brcms_c_compute_ofdm_plcp(rspec, length, plcp); + else + brcms_c_compute_cck_plcp(wlc, rspec, length, plcp); +} + +/* brcms_c_compute_rtscts_dur() + * + * Calculate the 802.11 MAC header DUR field for an RTS or CTS frame + * DUR for normal RTS/CTS w/ frame = 3 SIFS + 1 CTS + next frame time + 1 ACK + * DUR for CTS-TO-SELF w/ frame = 2 SIFS + next frame time + 1 ACK + * + * cts cts-to-self or rts/cts + * rts_rate rts or cts rate in unit of 500kbps + * rate next MPDU rate in unit of 500kbps + * frame_len next MPDU frame length in bytes + */ +u16 +brcms_c_compute_rtscts_dur(struct brcms_c_info *wlc, bool cts_only, + u32 rts_rate, + u32 frame_rate, u8 rts_preamble_type, + u8 frame_preamble_type, uint frame_len, bool ba) +{ + u16 dur, sifs; + + sifs = get_sifs(wlc->band); + + if (!cts_only) { + /* RTS/CTS */ + dur = 3 * sifs; + dur += + (u16) brcms_c_calc_cts_time(wlc, rts_rate, + rts_preamble_type); + } else { + /* CTS-TO-SELF */ + dur = 2 * sifs; + } + + dur += + (u16) brcms_c_calc_frame_time(wlc, frame_rate, frame_preamble_type, + frame_len); + if (ba) + dur += + (u16) brcms_c_calc_ba_time(wlc, frame_rate, + BRCMS_SHORT_PREAMBLE); + else + dur += + (u16) brcms_c_calc_ack_time(wlc, frame_rate, + frame_preamble_type); + return dur; +} + +static u16 brcms_c_phytxctl1_calc(struct brcms_c_info *wlc, u32 rspec) +{ + u16 phyctl1 = 0; + u16 bw; + + if (BRCMS_ISLCNPHY(wlc->band)) { + bw = PHY_TXC1_BW_20MHZ; + } else { + bw = rspec_get_bw(rspec); + /* 10Mhz is not supported yet */ + if (bw < PHY_TXC1_BW_20MHZ) { + wiphy_err(wlc->wiphy, "phytxctl1_calc: bw %d is " + "not supported yet, set to 20L\n", bw); + bw = PHY_TXC1_BW_20MHZ; + } + } + + if (is_mcs_rate(rspec)) { + uint mcs = rspec & RSPEC_RATE_MASK; + + /* bw, stf, coding-type is part of rspec_phytxbyte2 returns */ + phyctl1 = rspec_phytxbyte2(rspec); + /* set the upper byte of phyctl1 */ + phyctl1 |= (mcs_table[mcs].tx_phy_ctl3 << 8); + } else if (is_cck_rate(rspec) && !BRCMS_ISLCNPHY(wlc->band) + && !BRCMS_ISSSLPNPHY(wlc->band)) { + /* + * In CCK mode LPPHY overloads OFDM Modulation bits with CCK + * Data Rate. Eventually MIMOPHY would also be converted to + * this format + */ + /* 0 = 1Mbps; 1 = 2Mbps; 2 = 5.5Mbps; 3 = 11Mbps */ + phyctl1 = (bw | (rspec_stf(rspec) << PHY_TXC1_MODE_SHIFT)); + } else { /* legacy OFDM/CCK */ + s16 phycfg; + /* get the phyctl byte from rate phycfg table */ + phycfg = brcms_c_rate_legacy_phyctl(rspec2rate(rspec)); + if (phycfg == -1) { + wiphy_err(wlc->wiphy, "phytxctl1_calc: wrong " + "legacy OFDM/CCK rate\n"); + phycfg = 0; + } + /* set the upper byte of phyctl1 */ + phyctl1 = + (bw | (phycfg << 8) | + (rspec_stf(rspec) << PHY_TXC1_MODE_SHIFT)); + } + return phyctl1; +} + +/* + * Add struct d11txh, struct cck_phy_hdr. + * + * 'p' data must start with 802.11 MAC header + * 'p' must allow enough bytes of local headers to be "pushed" onto the packet + * + * headroom == D11_PHY_HDR_LEN + D11_TXH_LEN (D11_TXH_LEN is now 104 bytes) + * + */ +static u16 +brcms_c_d11hdrs_mac80211(struct brcms_c_info *wlc, struct ieee80211_hw *hw, + struct sk_buff *p, struct scb *scb, uint frag, + uint nfrags, uint queue, uint next_frag_len) +{ + struct ieee80211_hdr *h; + struct d11txh *txh; + u8 *plcp, plcp_fallback[D11_PHY_HDR_LEN]; + int len, phylen, rts_phylen; + u16 mch, phyctl, xfts, mainrates; + u16 seq = 0, mcl = 0, status = 0, frameid = 0; + u32 rspec[2] = { BRCM_RATE_1M, BRCM_RATE_1M }; + u32 rts_rspec[2] = { BRCM_RATE_1M, BRCM_RATE_1M }; + bool use_rts = false; + bool use_cts = false; + bool use_rifs = false; + bool short_preamble[2] = { false, false }; + u8 preamble_type[2] = { BRCMS_LONG_PREAMBLE, BRCMS_LONG_PREAMBLE }; + u8 rts_preamble_type[2] = { BRCMS_LONG_PREAMBLE, BRCMS_LONG_PREAMBLE }; + u8 *rts_plcp, rts_plcp_fallback[D11_PHY_HDR_LEN]; + struct ieee80211_rts *rts = NULL; + bool qos; + uint ac; + bool hwtkmic = false; + u16 mimo_ctlchbw = PHY_TXC1_BW_20MHZ; +#define ANTCFG_NONE 0xFF + u8 antcfg = ANTCFG_NONE; + u8 fbantcfg = ANTCFG_NONE; + uint phyctl1_stf = 0; + u16 durid = 0; + struct ieee80211_tx_rate *txrate[2]; + int k; + struct ieee80211_tx_info *tx_info; + bool is_mcs; + u16 mimo_txbw; + u8 mimo_preamble_type; + + /* locate 802.11 MAC header */ + h = (struct ieee80211_hdr *)(p->data); + qos = ieee80211_is_data_qos(h->frame_control); + + /* compute length of frame in bytes for use in PLCP computations */ + len = brcmu_pkttotlen(p); + phylen = len + FCS_LEN; + + /* Get tx_info */ + tx_info = IEEE80211_SKB_CB(p); + + /* add PLCP */ + plcp = skb_push(p, D11_PHY_HDR_LEN); + + /* add Broadcom tx descriptor header */ + txh = (struct d11txh *) skb_push(p, D11_TXH_LEN); + memset(txh, 0, D11_TXH_LEN); + + /* setup frameid */ + if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { + /* non-AP STA should never use BCMC queue */ + if (queue == TX_BCMC_FIFO) { + wiphy_err(wlc->wiphy, "wl%d: %s: ASSERT queue == " + "TX_BCMC!\n", wlc->pub->unit, __func__); + frameid = bcmc_fid_generate(wlc, NULL, txh); + } else { + /* Increment the counter for first fragment */ + if (tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) + scb->seqnum[p->priority]++; + + /* extract fragment number from frame first */ + seq = le16_to_cpu(h->seq_ctrl) & FRAGNUM_MASK; + seq |= (scb->seqnum[p->priority] << SEQNUM_SHIFT); + h->seq_ctrl = cpu_to_le16(seq); + + frameid = ((seq << TXFID_SEQ_SHIFT) & TXFID_SEQ_MASK) | + (queue & TXFID_QUEUE_MASK); + } + } + frameid |= queue & TXFID_QUEUE_MASK; + + /* set the ignpmq bit for all pkts tx'd in PS mode and for beacons */ + if (ieee80211_is_beacon(h->frame_control)) + mcl |= TXC_IGNOREPMQ; + + txrate[0] = tx_info->control.rates; + txrate[1] = txrate[0] + 1; + + /* + * if rate control algorithm didn't give us a fallback + * rate, use the primary rate + */ + if (txrate[1]->idx < 0) + txrate[1] = txrate[0]; + + for (k = 0; k < hw->max_rates; k++) { + is_mcs = txrate[k]->flags & IEEE80211_TX_RC_MCS ? true : false; + if (!is_mcs) { + if ((txrate[k]->idx >= 0) + && (txrate[k]->idx < + hw->wiphy->bands[tx_info->band]->n_bitrates)) { + rspec[k] = + hw->wiphy->bands[tx_info->band]-> + bitrates[txrate[k]->idx].hw_value; + short_preamble[k] = + txrate[k]-> + flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE ? + true : false; + } else { + rspec[k] = BRCM_RATE_1M; + } + } else { + rspec[k] = mac80211_wlc_set_nrate(wlc, wlc->band, + NRATE_MCS_INUSE | txrate[k]->idx); + } + + /* + * Currently only support same setting for primay and + * fallback rates. Unify flags for each rate into a + * single value for the frame + */ + use_rts |= + txrate[k]-> + flags & IEEE80211_TX_RC_USE_RTS_CTS ? true : false; + use_cts |= + txrate[k]-> + flags & IEEE80211_TX_RC_USE_CTS_PROTECT ? true : false; + + + /* + * (1) RATE: + * determine and validate primary rate + * and fallback rates + */ + if (!rspec_active(rspec[k])) { + rspec[k] = BRCM_RATE_1M; + } else { + if (!is_multicast_ether_addr(h->addr1)) { + /* set tx antenna config */ + brcms_c_antsel_antcfg_get(wlc->asi, false, + false, 0, 0, &antcfg, &fbantcfg); + } + } + } + + phyctl1_stf = wlc->stf->ss_opmode; + + if (wlc->pub->_n_enab & SUPPORT_11N) { + for (k = 0; k < hw->max_rates; k++) { + /* + * apply siso/cdd to single stream mcs's or ofdm + * if rspec is auto selected + */ + if (((is_mcs_rate(rspec[k]) && + is_single_stream(rspec[k] & RSPEC_RATE_MASK)) || + is_ofdm_rate(rspec[k])) + && ((rspec[k] & RSPEC_OVERRIDE_MCS_ONLY) + || !(rspec[k] & RSPEC_OVERRIDE))) { + rspec[k] &= ~(RSPEC_STF_MASK | RSPEC_STC_MASK); + + /* For SISO MCS use STBC if possible */ + if (is_mcs_rate(rspec[k]) + && BRCMS_STF_SS_STBC_TX(wlc, scb)) { + u8 stc; + + /* Nss for single stream is always 1 */ + stc = 1; + rspec[k] |= (PHY_TXC1_MODE_STBC << + RSPEC_STF_SHIFT) | + (stc << RSPEC_STC_SHIFT); + } else + rspec[k] |= + (phyctl1_stf << RSPEC_STF_SHIFT); + } + + /* + * Is the phy configured to use 40MHZ frames? If + * so then pick the desired txbw + */ + if (brcms_chspec_bw(wlc->chanspec) == BRCMS_40_MHZ) { + /* default txbw is 20in40 SB */ + mimo_ctlchbw = mimo_txbw = + CHSPEC_SB_UPPER(wlc_phy_chanspec_get( + wlc->band->pi)) + ? PHY_TXC1_BW_20MHZ_UP : PHY_TXC1_BW_20MHZ; + + if (is_mcs_rate(rspec[k])) { + /* mcs 32 must be 40b/w DUP */ + if ((rspec[k] & RSPEC_RATE_MASK) + == 32) { + mimo_txbw = + PHY_TXC1_BW_40MHZ_DUP; + /* use override */ + } else if (wlc->mimo_40txbw != AUTO) + mimo_txbw = wlc->mimo_40txbw; + /* else check if dst is using 40 Mhz */ + else if (scb->flags & SCB_IS40) + mimo_txbw = PHY_TXC1_BW_40MHZ; + } else if (is_ofdm_rate(rspec[k])) { + if (wlc->ofdm_40txbw != AUTO) + mimo_txbw = wlc->ofdm_40txbw; + } else if (wlc->cck_40txbw != AUTO) { + mimo_txbw = wlc->cck_40txbw; + } + } else { + /* + * mcs32 is 40 b/w only. + * This is possible for probe packets on + * a STA during SCAN + */ + if ((rspec[k] & RSPEC_RATE_MASK) == 32) + /* mcs 0 */ + rspec[k] = RSPEC_MIMORATE; + + mimo_txbw = PHY_TXC1_BW_20MHZ; + } + + /* Set channel width */ + rspec[k] &= ~RSPEC_BW_MASK; + if ((k == 0) || ((k > 0) && is_mcs_rate(rspec[k]))) + rspec[k] |= (mimo_txbw << RSPEC_BW_SHIFT); + else + rspec[k] |= (mimo_ctlchbw << RSPEC_BW_SHIFT); + + /* Disable short GI, not supported yet */ + rspec[k] &= ~RSPEC_SHORT_GI; + + mimo_preamble_type = BRCMS_MM_PREAMBLE; + if (txrate[k]->flags & IEEE80211_TX_RC_GREEN_FIELD) + mimo_preamble_type = BRCMS_GF_PREAMBLE; + + if ((txrate[k]->flags & IEEE80211_TX_RC_MCS) + && (!is_mcs_rate(rspec[k]))) { + wiphy_err(wlc->wiphy, "wl%d: %s: IEEE80211_TX_" + "RC_MCS != is_mcs_rate(rspec)\n", + wlc->pub->unit, __func__); + } + + if (is_mcs_rate(rspec[k])) { + preamble_type[k] = mimo_preamble_type; + + /* + * if SGI is selected, then forced mm + * for single stream + */ + if ((rspec[k] & RSPEC_SHORT_GI) + && is_single_stream(rspec[k] & + RSPEC_RATE_MASK)) + preamble_type[k] = BRCMS_MM_PREAMBLE; + } + + /* should be better conditionalized */ + if (!is_mcs_rate(rspec[0]) + && (tx_info->control.rates[0]. + flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)) + preamble_type[k] = BRCMS_SHORT_PREAMBLE; + } + } else { + for (k = 0; k < hw->max_rates; k++) { + /* Set ctrlchbw as 20Mhz */ + rspec[k] &= ~RSPEC_BW_MASK; + rspec[k] |= (PHY_TXC1_BW_20MHZ << RSPEC_BW_SHIFT); + + /* for nphy, stf of ofdm frames must follow policies */ + if (BRCMS_ISNPHY(wlc->band) && is_ofdm_rate(rspec[k])) { + rspec[k] &= ~RSPEC_STF_MASK; + rspec[k] |= phyctl1_stf << RSPEC_STF_SHIFT; + } + } + } + + /* Reset these for use with AMPDU's */ + txrate[0]->count = 0; + txrate[1]->count = 0; + + /* (2) PROTECTION, may change rspec */ + if ((ieee80211_is_data(h->frame_control) || + ieee80211_is_mgmt(h->frame_control)) && + (phylen > wlc->RTSThresh) && !is_multicast_ether_addr(h->addr1)) + use_rts = true; + + /* (3) PLCP: determine PLCP header and MAC duration, + * fill struct d11txh */ + brcms_c_compute_plcp(wlc, rspec[0], phylen, plcp); + brcms_c_compute_plcp(wlc, rspec[1], phylen, plcp_fallback); + memcpy(&txh->FragPLCPFallback, + plcp_fallback, sizeof(txh->FragPLCPFallback)); + + /* Length field now put in CCK FBR CRC field */ + if (is_cck_rate(rspec[1])) { + txh->FragPLCPFallback[4] = phylen & 0xff; + txh->FragPLCPFallback[5] = (phylen & 0xff00) >> 8; + } + + /* MIMO-RATE: need validation ?? */ + mainrates = is_ofdm_rate(rspec[0]) ? + D11A_PHY_HDR_GRATE((struct ofdm_phy_hdr *) plcp) : + plcp[0]; + + /* DUR field for main rate */ + if (!ieee80211_is_pspoll(h->frame_control) && + !is_multicast_ether_addr(h->addr1) && !use_rifs) { + durid = + brcms_c_compute_frame_dur(wlc, rspec[0], preamble_type[0], + next_frag_len); + h->duration_id = cpu_to_le16(durid); + } else if (use_rifs) { + /* NAV protect to end of next max packet size */ + durid = + (u16) brcms_c_calc_frame_time(wlc, rspec[0], + preamble_type[0], + DOT11_MAX_FRAG_LEN); + durid += RIFS_11N_TIME; + h->duration_id = cpu_to_le16(durid); + } + + /* DUR field for fallback rate */ + if (ieee80211_is_pspoll(h->frame_control)) + txh->FragDurFallback = h->duration_id; + else if (is_multicast_ether_addr(h->addr1) || use_rifs) + txh->FragDurFallback = 0; + else { + durid = brcms_c_compute_frame_dur(wlc, rspec[1], + preamble_type[1], next_frag_len); + txh->FragDurFallback = cpu_to_le16(durid); + } + + /* (4) MAC-HDR: MacTxControlLow */ + if (frag == 0) + mcl |= TXC_STARTMSDU; + + if (!is_multicast_ether_addr(h->addr1)) + mcl |= TXC_IMMEDACK; + + if (wlc->band->bandtype == BRCM_BAND_5G) + mcl |= TXC_FREQBAND_5G; + + if (CHSPEC_IS40(wlc_phy_chanspec_get(wlc->band->pi))) + mcl |= TXC_BW_40; + + /* set AMIC bit if using hardware TKIP MIC */ + if (hwtkmic) + mcl |= TXC_AMIC; + + txh->MacTxControlLow = cpu_to_le16(mcl); + + /* MacTxControlHigh */ + mch = 0; + + /* Set fallback rate preamble type */ + if ((preamble_type[1] == BRCMS_SHORT_PREAMBLE) || + (preamble_type[1] == BRCMS_GF_PREAMBLE)) { + if (rspec2rate(rspec[1]) != BRCM_RATE_1M) + mch |= TXC_PREAMBLE_DATA_FB_SHORT; + } + + /* MacFrameControl */ + memcpy(&txh->MacFrameControl, &h->frame_control, sizeof(u16)); + txh->TxFesTimeNormal = cpu_to_le16(0); + + txh->TxFesTimeFallback = cpu_to_le16(0); + + /* TxFrameRA */ + memcpy(&txh->TxFrameRA, &h->addr1, ETH_ALEN); + + /* TxFrameID */ + txh->TxFrameID = cpu_to_le16(frameid); + + /* + * TxStatus, Note the case of recreating the first frag of a suppressed + * frame then we may need to reset the retry cnt's via the status reg + */ + txh->TxStatus = cpu_to_le16(status); + + /* + * extra fields for ucode AMPDU aggregation, the new fields are added to + * the END of previous structure so that it's compatible in driver. + */ + txh->MaxNMpdus = cpu_to_le16(0); + txh->MaxABytes_MRT = cpu_to_le16(0); + txh->MaxABytes_FBR = cpu_to_le16(0); + txh->MinMBytes = cpu_to_le16(0); + + /* (5) RTS/CTS: determine RTS/CTS PLCP header and MAC duration, + * furnish struct d11txh */ + /* RTS PLCP header and RTS frame */ + if (use_rts || use_cts) { + if (use_rts && use_cts) + use_cts = false; + + for (k = 0; k < 2; k++) { + rts_rspec[k] = brcms_c_rspec_to_rts_rspec(wlc, rspec[k], + false, + mimo_ctlchbw); + } + + if (!is_ofdm_rate(rts_rspec[0]) && + !((rspec2rate(rts_rspec[0]) == BRCM_RATE_1M) || + (wlc->PLCPHdr_override == BRCMS_PLCP_LONG))) { + rts_preamble_type[0] = BRCMS_SHORT_PREAMBLE; + mch |= TXC_PREAMBLE_RTS_MAIN_SHORT; + } + + if (!is_ofdm_rate(rts_rspec[1]) && + !((rspec2rate(rts_rspec[1]) == BRCM_RATE_1M) || + (wlc->PLCPHdr_override == BRCMS_PLCP_LONG))) { + rts_preamble_type[1] = BRCMS_SHORT_PREAMBLE; + mch |= TXC_PREAMBLE_RTS_FB_SHORT; + } + + /* RTS/CTS additions to MacTxControlLow */ + if (use_cts) { + txh->MacTxControlLow |= cpu_to_le16(TXC_SENDCTS); + } else { + txh->MacTxControlLow |= cpu_to_le16(TXC_SENDRTS); + txh->MacTxControlLow |= cpu_to_le16(TXC_LONGFRAME); + } + + /* RTS PLCP header */ + rts_plcp = txh->RTSPhyHeader; + if (use_cts) + rts_phylen = DOT11_CTS_LEN + FCS_LEN; + else + rts_phylen = DOT11_RTS_LEN + FCS_LEN; + + brcms_c_compute_plcp(wlc, rts_rspec[0], rts_phylen, rts_plcp); + + /* fallback rate version of RTS PLCP header */ + brcms_c_compute_plcp(wlc, rts_rspec[1], rts_phylen, + rts_plcp_fallback); + memcpy(&txh->RTSPLCPFallback, rts_plcp_fallback, + sizeof(txh->RTSPLCPFallback)); + + /* RTS frame fields... */ + rts = (struct ieee80211_rts *)&txh->rts_frame; + + durid = brcms_c_compute_rtscts_dur(wlc, use_cts, rts_rspec[0], + rspec[0], rts_preamble_type[0], + preamble_type[0], phylen, false); + rts->duration = cpu_to_le16(durid); + /* fallback rate version of RTS DUR field */ + durid = brcms_c_compute_rtscts_dur(wlc, use_cts, + rts_rspec[1], rspec[1], + rts_preamble_type[1], + preamble_type[1], phylen, false); + txh->RTSDurFallback = cpu_to_le16(durid); + + if (use_cts) { + rts->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | + IEEE80211_STYPE_CTS); + + memcpy(&rts->ra, &h->addr2, ETH_ALEN); + } else { + rts->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | + IEEE80211_STYPE_RTS); + + memcpy(&rts->ra, &h->addr1, 2 * ETH_ALEN); + } + + /* mainrate + * low 8 bits: main frag rate/mcs, + * high 8 bits: rts/cts rate/mcs + */ + mainrates |= (is_ofdm_rate(rts_rspec[0]) ? + D11A_PHY_HDR_GRATE( + (struct ofdm_phy_hdr *) rts_plcp) : + rts_plcp[0]) << 8; + } else { + memset((char *)txh->RTSPhyHeader, 0, D11_PHY_HDR_LEN); + memset((char *)&txh->rts_frame, 0, + sizeof(struct ieee80211_rts)); + memset((char *)txh->RTSPLCPFallback, 0, + sizeof(txh->RTSPLCPFallback)); + txh->RTSDurFallback = 0; + } + +#ifdef SUPPORT_40MHZ + /* add null delimiter count */ + if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && is_mcs_rate(rspec)) + txh->RTSPLCPFallback[AMPDU_FBR_NULL_DELIM] = + brcm_c_ampdu_null_delim_cnt(wlc->ampdu, scb, rspec, phylen); + +#endif + + /* + * Now that RTS/RTS FB preamble types are updated, write + * the final value + */ + txh->MacTxControlHigh = cpu_to_le16(mch); + + /* + * MainRates (both the rts and frag plcp rates have + * been calculated now) + */ + txh->MainRates = cpu_to_le16(mainrates); + + /* XtraFrameTypes */ + xfts = frametype(rspec[1], wlc->mimoft); + xfts |= (frametype(rts_rspec[0], wlc->mimoft) << XFTS_RTS_FT_SHIFT); + xfts |= (frametype(rts_rspec[1], wlc->mimoft) << XFTS_FBRRTS_FT_SHIFT); + xfts |= CHSPEC_CHANNEL(wlc_phy_chanspec_get(wlc->band->pi)) << + XFTS_CHANNEL_SHIFT; + txh->XtraFrameTypes = cpu_to_le16(xfts); + + /* PhyTxControlWord */ + phyctl = frametype(rspec[0], wlc->mimoft); + if ((preamble_type[0] == BRCMS_SHORT_PREAMBLE) || + (preamble_type[0] == BRCMS_GF_PREAMBLE)) { + if (rspec2rate(rspec[0]) != BRCM_RATE_1M) + phyctl |= PHY_TXC_SHORT_HDR; + } + + /* phytxant is properly bit shifted */ + phyctl |= brcms_c_stf_d11hdrs_phyctl_txant(wlc, rspec[0]); + txh->PhyTxControlWord = cpu_to_le16(phyctl); + + /* PhyTxControlWord_1 */ + if (BRCMS_PHY_11N_CAP(wlc->band)) { + u16 phyctl1 = 0; + + phyctl1 = brcms_c_phytxctl1_calc(wlc, rspec[0]); + txh->PhyTxControlWord_1 = cpu_to_le16(phyctl1); + phyctl1 = brcms_c_phytxctl1_calc(wlc, rspec[1]); + txh->PhyTxControlWord_1_Fbr = cpu_to_le16(phyctl1); + + if (use_rts || use_cts) { + phyctl1 = brcms_c_phytxctl1_calc(wlc, rts_rspec[0]); + txh->PhyTxControlWord_1_Rts = cpu_to_le16(phyctl1); + phyctl1 = brcms_c_phytxctl1_calc(wlc, rts_rspec[1]); + txh->PhyTxControlWord_1_FbrRts = cpu_to_le16(phyctl1); + } + + /* + * For mcs frames, if mixedmode(overloaded with long preamble) + * is going to be set, fill in non-zero MModeLen and/or + * MModeFbrLen it will be unnecessary if they are separated + */ + if (is_mcs_rate(rspec[0]) && + (preamble_type[0] == BRCMS_MM_PREAMBLE)) { + u16 mmodelen = + brcms_c_calc_lsig_len(wlc, rspec[0], phylen); + txh->MModeLen = cpu_to_le16(mmodelen); + } + + if (is_mcs_rate(rspec[1]) && + (preamble_type[1] == BRCMS_MM_PREAMBLE)) { + u16 mmodefbrlen = + brcms_c_calc_lsig_len(wlc, rspec[1], phylen); + txh->MModeFbrLen = cpu_to_le16(mmodefbrlen); + } + } + + ac = skb_get_queue_mapping(p); + if ((scb->flags & SCB_WMECAP) && qos && wlc->edcf_txop[ac]) { + uint frag_dur, dur, dur_fallback; + + /* WME: Update TXOP threshold */ + if (!(tx_info->flags & IEEE80211_TX_CTL_AMPDU) && frag == 0) { + frag_dur = + brcms_c_calc_frame_time(wlc, rspec[0], + preamble_type[0], phylen); + + if (rts) { + /* 1 RTS or CTS-to-self frame */ + dur = + brcms_c_calc_cts_time(wlc, rts_rspec[0], + rts_preamble_type[0]); + dur_fallback = + brcms_c_calc_cts_time(wlc, rts_rspec[1], + rts_preamble_type[1]); + /* (SIFS + CTS) + SIFS + frame + SIFS + ACK */ + dur += le16_to_cpu(rts->duration); + dur_fallback += + le16_to_cpu(txh->RTSDurFallback); + } else if (use_rifs) { + dur = frag_dur; + dur_fallback = 0; + } else { + /* frame + SIFS + ACK */ + dur = frag_dur; + dur += + brcms_c_compute_frame_dur(wlc, rspec[0], + preamble_type[0], 0); + + dur_fallback = + brcms_c_calc_frame_time(wlc, rspec[1], + preamble_type[1], + phylen); + dur_fallback += + brcms_c_compute_frame_dur(wlc, rspec[1], + preamble_type[1], 0); + } + /* NEED to set TxFesTimeNormal (hard) */ + txh->TxFesTimeNormal = cpu_to_le16((u16) dur); + /* + * NEED to set fallback rate version of + * TxFesTimeNormal (hard) + */ + txh->TxFesTimeFallback = + cpu_to_le16((u16) dur_fallback); + + /* + * update txop byte threshold (txop minus intraframe + * overhead) + */ + if (wlc->edcf_txop[ac] >= (dur - frag_dur)) { + uint newfragthresh; + + newfragthresh = + brcms_c_calc_frame_len(wlc, + rspec[0], preamble_type[0], + (wlc->edcf_txop[ac] - + (dur - frag_dur))); + /* range bound the fragthreshold */ + if (newfragthresh < DOT11_MIN_FRAG_LEN) + newfragthresh = + DOT11_MIN_FRAG_LEN; + else if (newfragthresh > + wlc->usr_fragthresh) + newfragthresh = + wlc->usr_fragthresh; + /* update the fragthresh and do txc update */ + if (wlc->fragthresh[queue] != + (u16) newfragthresh) + wlc->fragthresh[queue] = + (u16) newfragthresh; + } else { + wiphy_err(wlc->wiphy, "wl%d: %s txop invalid " + "for rate %d\n", + wlc->pub->unit, fifo_names[queue], + rspec2rate(rspec[0])); + } + + if (dur > wlc->edcf_txop[ac]) + wiphy_err(wlc->wiphy, "wl%d: %s: %s txop " + "exceeded phylen %d/%d dur %d/%d\n", + wlc->pub->unit, __func__, + fifo_names[queue], + phylen, wlc->fragthresh[queue], + dur, wlc->edcf_txop[ac]); + } + } + + return 0; +} + +void brcms_c_sendpkt_mac80211(struct brcms_c_info *wlc, struct sk_buff *sdu, + struct ieee80211_hw *hw) +{ + u8 prio; + uint fifo; + struct scb *scb = &wlc->pri_scb; + struct ieee80211_hdr *d11_header = (struct ieee80211_hdr *)(sdu->data); + + /* + * 802.11 standard requires management traffic + * to go at highest priority + */ + prio = ieee80211_is_data(d11_header->frame_control) ? sdu->priority : + MAXPRIO; + fifo = prio2fifo[prio]; + if (brcms_c_d11hdrs_mac80211(wlc, hw, sdu, scb, 0, 1, fifo, 0)) + return; + brcms_c_txq_enq(wlc, scb, sdu, BRCMS_PRIO_TO_PREC(prio)); + brcms_c_send_q(wlc); +} + +void brcms_c_send_q(struct brcms_c_info *wlc) +{ + struct sk_buff *pkt[DOT11_MAXNUMFRAGS]; + int prec; + u16 prec_map; + int err = 0, i, count; + uint fifo; + struct brcms_txq_info *qi = wlc->pkt_queue; + struct pktq *q = &qi->q; + struct ieee80211_tx_info *tx_info; + + prec_map = wlc->tx_prec_map; + + /* Send all the enq'd pkts that we can. + * Dequeue packets with precedence with empty HW fifo only + */ + while (prec_map && (pkt[0] = brcmu_pktq_mdeq(q, prec_map, &prec))) { + tx_info = IEEE80211_SKB_CB(pkt[0]); + if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { + err = brcms_c_sendampdu(wlc->ampdu, qi, pkt, prec); + } else { + count = 1; + err = brcms_c_prep_pdu(wlc, pkt[0], &fifo); + if (!err) { + for (i = 0; i < count; i++) + brcms_c_txfifo(wlc, fifo, pkt[i], true, + 1); + } + } + + if (err == -EBUSY) { + brcmu_pktq_penq_head(q, prec, pkt[0]); + /* + * If send failed due to any other reason than a + * change in HW FIFO condition, quit. Otherwise, + * read the new prec_map! + */ + if (prec_map == wlc->tx_prec_map) + break; + prec_map = wlc->tx_prec_map; + } + } +} + +void +brcms_c_txfifo(struct brcms_c_info *wlc, uint fifo, struct sk_buff *p, + bool commit, s8 txpktpend) +{ + u16 frameid = INVALIDFID; + struct d11txh *txh; + + txh = (struct d11txh *) (p->data); + + /* When a BC/MC frame is being committed to the BCMC fifo + * via DMA (NOT PIO), update ucode or BSS info as appropriate. + */ + if (fifo == TX_BCMC_FIFO) + frameid = le16_to_cpu(txh->TxFrameID); + + /* + * Bump up pending count for if not using rpc. If rpc is + * used, this will be handled in brcms_b_txfifo() + */ + if (commit) { + wlc->core->txpktpend[fifo] += txpktpend; + BCMMSG(wlc->wiphy, "pktpend inc %d to %d\n", + txpktpend, wlc->core->txpktpend[fifo]); + } + + /* Commit BCMC sequence number in the SHM frame ID location */ + if (frameid != INVALIDFID) { + /* + * To inform the ucode of the last mcast frame posted + * so that it can clear moredata bit + */ + brcms_b_write_shm(wlc->hw, M_BCMC_FID, frameid); + } + + if (dma_txfast(wlc->hw->di[fifo], p, commit) < 0) + wiphy_err(wlc->wiphy, "txfifo: fatal, toss frames !!!\n"); +} + +u32 +brcms_c_rspec_to_rts_rspec(struct brcms_c_info *wlc, u32 rspec, + bool use_rspec, u16 mimo_ctlchbw) +{ + u32 rts_rspec = 0; + + if (use_rspec) + /* use frame rate as rts rate */ + rts_rspec = rspec; + else if (wlc->band->gmode && wlc->protection->_g && !is_cck_rate(rspec)) + /* Use 11Mbps as the g protection RTS target rate and fallback. + * Use the brcms_basic_rate() lookup to find the best basic rate + * under the target in case 11 Mbps is not Basic. + * 6 and 9 Mbps are not usually selected by rate selection, but + * even if the OFDM rate we are protecting is 6 or 9 Mbps, 11 + * is more robust. + */ + rts_rspec = brcms_basic_rate(wlc, BRCM_RATE_11M); + else + /* calculate RTS rate and fallback rate based on the frame rate + * RTS must be sent at a basic rate since it is a + * control frame, sec 9.6 of 802.11 spec + */ + rts_rspec = brcms_basic_rate(wlc, rspec); + + if (BRCMS_PHY_11N_CAP(wlc->band)) { + /* set rts txbw to correct side band */ + rts_rspec &= ~RSPEC_BW_MASK; + + /* + * if rspec/rspec_fallback is 40MHz, then send RTS on both + * 20MHz channel (DUP), otherwise send RTS on control channel + */ + if (rspec_is40mhz(rspec) && !is_cck_rate(rts_rspec)) + rts_rspec |= (PHY_TXC1_BW_40MHZ_DUP << RSPEC_BW_SHIFT); + else + rts_rspec |= (mimo_ctlchbw << RSPEC_BW_SHIFT); + + /* pick siso/cdd as default for ofdm */ + if (is_ofdm_rate(rts_rspec)) { + rts_rspec &= ~RSPEC_STF_MASK; + rts_rspec |= (wlc->stf->ss_opmode << RSPEC_STF_SHIFT); + } + } + return rts_rspec; +} + +void +brcms_c_txfifo_complete(struct brcms_c_info *wlc, uint fifo, s8 txpktpend) +{ + wlc->core->txpktpend[fifo] -= txpktpend; + BCMMSG(wlc->wiphy, "pktpend dec %d to %d\n", txpktpend, + wlc->core->txpktpend[fifo]); + + /* There is more room; mark precedences related to this FIFO sendable */ + wlc->tx_prec_map |= wlc->fifo2prec_map[fifo]; + + /* figure out which bsscfg is being worked on... */ +} + +/* Update beacon listen interval in shared memory */ +static void brcms_c_bcn_li_upd(struct brcms_c_info *wlc) +{ + /* wake up every DTIM is the default */ + if (wlc->bcn_li_dtim == 1) + brcms_b_write_shm(wlc->hw, M_BCN_LI, 0); + else + brcms_b_write_shm(wlc->hw, M_BCN_LI, + (wlc->bcn_li_dtim << 8) | wlc->bcn_li_bcn); +} + +static void +brcms_b_read_tsf(struct brcms_hardware *wlc_hw, u32 *tsf_l_ptr, + u32 *tsf_h_ptr) +{ + struct d11regs __iomem *regs = wlc_hw->regs; + + /* read the tsf timer low, then high to get an atomic read */ + *tsf_l_ptr = R_REG(®s->tsf_timerlow); + *tsf_h_ptr = R_REG(®s->tsf_timerhigh); +} + +/* + * recover 64bit TSF value from the 16bit TSF value in the rx header + * given the assumption that the TSF passed in header is within 65ms + * of the current tsf. + * + * 6 5 4 4 3 2 1 + * 3.......6.......8.......0.......2.......4.......6.......8......0 + * |<---------- tsf_h ----------->||<--- tsf_l -->||<-RxTSFTime ->| + * + * The RxTSFTime are the lowest 16 bits and provided by the ucode. The + * tsf_l is filled in by brcms_b_recv, which is done earlier in the + * receive call sequence after rx interrupt. Only the higher 16 bits + * are used. Finally, the tsf_h is read from the tsf register. + */ +static u64 brcms_c_recover_tsf64(struct brcms_c_info *wlc, + struct d11rxhdr *rxh) +{ + u32 tsf_h, tsf_l; + u16 rx_tsf_0_15, rx_tsf_16_31; + + brcms_b_read_tsf(wlc->hw, &tsf_l, &tsf_h); + + rx_tsf_16_31 = (u16)(tsf_l >> 16); + rx_tsf_0_15 = rxh->RxTSFTime; + + /* + * a greater tsf time indicates the low 16 bits of + * tsf_l wrapped, so decrement the high 16 bits. + */ + if ((u16)tsf_l < rx_tsf_0_15) { + rx_tsf_16_31 -= 1; + if (rx_tsf_16_31 == 0xffff) + tsf_h -= 1; + } + + return ((u64)tsf_h << 32) | (((u32)rx_tsf_16_31 << 16) + rx_tsf_0_15); +} + +static void +prep_mac80211_status(struct brcms_c_info *wlc, struct d11rxhdr *rxh, + struct sk_buff *p, + struct ieee80211_rx_status *rx_status) +{ + int preamble; + int channel; + u32 rspec; + unsigned char *plcp; + + /* fill in TSF and flag its presence */ + rx_status->mactime = brcms_c_recover_tsf64(wlc, rxh); + rx_status->flag |= RX_FLAG_MACTIME_MPDU; + + channel = BRCMS_CHAN_CHANNEL(rxh->RxChan); + + if (channel > 14) { + rx_status->band = IEEE80211_BAND_5GHZ; + rx_status->freq = ieee80211_ofdm_chan_to_freq( + WF_CHAN_FACTOR_5_G/2, channel); + + } else { + rx_status->band = IEEE80211_BAND_2GHZ; + rx_status->freq = ieee80211_dsss_chan_to_freq(channel); + } + + rx_status->signal = wlc_phy_rssi_compute(wlc->hw->band->pi, rxh); + + /* noise */ + /* qual */ + rx_status->antenna = + (rxh->PhyRxStatus_0 & PRXS0_RXANT_UPSUBBAND) ? 1 : 0; + + plcp = p->data; + + rspec = brcms_c_compute_rspec(rxh, plcp); + if (is_mcs_rate(rspec)) { + rx_status->rate_idx = rspec & RSPEC_RATE_MASK; + rx_status->flag |= RX_FLAG_HT; + if (rspec_is40mhz(rspec)) + rx_status->flag |= RX_FLAG_40MHZ; + } else { + switch (rspec2rate(rspec)) { + case BRCM_RATE_1M: + rx_status->rate_idx = 0; + break; + case BRCM_RATE_2M: + rx_status->rate_idx = 1; + break; + case BRCM_RATE_5M5: + rx_status->rate_idx = 2; + break; + case BRCM_RATE_11M: + rx_status->rate_idx = 3; + break; + case BRCM_RATE_6M: + rx_status->rate_idx = 4; + break; + case BRCM_RATE_9M: + rx_status->rate_idx = 5; + break; + case BRCM_RATE_12M: + rx_status->rate_idx = 6; + break; + case BRCM_RATE_18M: + rx_status->rate_idx = 7; + break; + case BRCM_RATE_24M: + rx_status->rate_idx = 8; + break; + case BRCM_RATE_36M: + rx_status->rate_idx = 9; + break; + case BRCM_RATE_48M: + rx_status->rate_idx = 10; + break; + case BRCM_RATE_54M: + rx_status->rate_idx = 11; + break; + default: + wiphy_err(wlc->wiphy, "%s: Unknown rate\n", __func__); + } + + /* + * For 5GHz, we should decrease the index as it is + * a subset of the 2.4G rates. See bitrates field + * of brcms_band_5GHz_nphy (in mac80211_if.c). + */ + if (rx_status->band == IEEE80211_BAND_5GHZ) + rx_status->rate_idx -= BRCMS_LEGACY_5G_RATE_OFFSET; + + /* Determine short preamble and rate_idx */ + preamble = 0; + if (is_cck_rate(rspec)) { + if (rxh->PhyRxStatus_0 & PRXS0_SHORTH) + rx_status->flag |= RX_FLAG_SHORTPRE; + } else if (is_ofdm_rate(rspec)) { + rx_status->flag |= RX_FLAG_SHORTPRE; + } else { + wiphy_err(wlc->wiphy, "%s: Unknown modulation\n", + __func__); + } + } + + if (plcp3_issgi(plcp[3])) + rx_status->flag |= RX_FLAG_SHORT_GI; + + if (rxh->RxStatus1 & RXS_DECERR) { + rx_status->flag |= RX_FLAG_FAILED_PLCP_CRC; + wiphy_err(wlc->wiphy, "%s: RX_FLAG_FAILED_PLCP_CRC\n", + __func__); + } + if (rxh->RxStatus1 & RXS_FCSERR) { + rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; + wiphy_err(wlc->wiphy, "%s: RX_FLAG_FAILED_FCS_CRC\n", + __func__); + } +} + +static void +brcms_c_recvctl(struct brcms_c_info *wlc, struct d11rxhdr *rxh, + struct sk_buff *p) +{ + int len_mpdu; + struct ieee80211_rx_status rx_status; + + memset(&rx_status, 0, sizeof(rx_status)); + prep_mac80211_status(wlc, rxh, p, &rx_status); + + /* mac header+body length, exclude CRC and plcp header */ + len_mpdu = p->len - D11_PHY_HDR_LEN - FCS_LEN; + skb_pull(p, D11_PHY_HDR_LEN); + __skb_trim(p, len_mpdu); + + memcpy(IEEE80211_SKB_RXCB(p), &rx_status, sizeof(rx_status)); + ieee80211_rx_irqsafe(wlc->pub->ieee_hw, p); +} + +/* calculate frame duration for Mixed-mode L-SIG spoofing, return + * number of bytes goes in the length field + * + * Formula given by HT PHY Spec v 1.13 + * len = 3(nsyms + nstream + 3) - 3 + */ +u16 +brcms_c_calc_lsig_len(struct brcms_c_info *wlc, u32 ratespec, + uint mac_len) +{ + uint nsyms, len = 0, kNdps; + + BCMMSG(wlc->wiphy, "wl%d: rate %d, len%d\n", + wlc->pub->unit, rspec2rate(ratespec), mac_len); + + if (is_mcs_rate(ratespec)) { + uint mcs = ratespec & RSPEC_RATE_MASK; + int tot_streams = (mcs_2_txstreams(mcs) + 1) + + rspec_stc(ratespec); + + /* + * the payload duration calculation matches that + * of regular ofdm + */ + /* 1000Ndbps = kbps * 4 */ + kNdps = mcs_2_rate(mcs, rspec_is40mhz(ratespec), + rspec_issgi(ratespec)) * 4; + + if (rspec_stc(ratespec) == 0) + nsyms = + CEIL((APHY_SERVICE_NBITS + 8 * mac_len + + APHY_TAIL_NBITS) * 1000, kNdps); + else + /* STBC needs to have even number of symbols */ + nsyms = + 2 * + CEIL((APHY_SERVICE_NBITS + 8 * mac_len + + APHY_TAIL_NBITS) * 1000, 2 * kNdps); + + /* (+3) account for HT-SIG(2) and HT-STF(1) */ + nsyms += (tot_streams + 3); + /* + * 3 bytes/symbol @ legacy 6Mbps rate + * (-3) excluding service bits and tail bits + */ + len = (3 * nsyms) - 3; + } + + return (u16) len; +} + +static void +brcms_c_mod_prb_rsp_rate_table(struct brcms_c_info *wlc, uint frame_len) +{ + const struct brcms_c_rateset *rs_dflt; + struct brcms_c_rateset rs; + u8 rate; + u16 entry_ptr; + u8 plcp[D11_PHY_HDR_LEN]; + u16 dur, sifs; + uint i; + + sifs = get_sifs(wlc->band); + + rs_dflt = brcms_c_rateset_get_hwrs(wlc); + + brcms_c_rateset_copy(rs_dflt, &rs); + brcms_c_rateset_mcs_upd(&rs, wlc->stf->txstreams); + + /* + * walk the phy rate table and update MAC core SHM + * basic rate table entries + */ + for (i = 0; i < rs.count; i++) { + rate = rs.rates[i] & BRCMS_RATE_MASK; + + entry_ptr = brcms_b_rate_shm_offset(wlc->hw, rate); + + /* Calculate the Probe Response PLCP for the given rate */ + brcms_c_compute_plcp(wlc, rate, frame_len, plcp); + + /* + * Calculate the duration of the Probe Response + * frame plus SIFS for the MAC + */ + dur = (u16) brcms_c_calc_frame_time(wlc, rate, + BRCMS_LONG_PREAMBLE, frame_len); + dur += sifs; + + /* Update the SHM Rate Table entry Probe Response values */ + brcms_b_write_shm(wlc->hw, entry_ptr + M_RT_PRS_PLCP_POS, + (u16) (plcp[0] + (plcp[1] << 8))); + brcms_b_write_shm(wlc->hw, entry_ptr + M_RT_PRS_PLCP_POS + 2, + (u16) (plcp[2] + (plcp[3] << 8))); + brcms_b_write_shm(wlc->hw, entry_ptr + M_RT_PRS_DUR_POS, dur); + } +} + +/* Max buffering needed for beacon template/prb resp template is 142 bytes. + * + * PLCP header is 6 bytes. + * 802.11 A3 header is 24 bytes. + * Max beacon frame body template length is 112 bytes. + * Max probe resp frame body template length is 110 bytes. + * + * *len on input contains the max length of the packet available. + * + * The *len value is set to the number of bytes in buf used, and starts + * with the PLCP and included up to, but not including, the 4 byte FCS. + */ +static void +brcms_c_bcn_prb_template(struct brcms_c_info *wlc, u16 type, + u32 bcn_rspec, + struct brcms_bss_cfg *cfg, u16 *buf, int *len) +{ + static const u8 ether_bcast[ETH_ALEN] = {255, 255, 255, 255, 255, 255}; + struct cck_phy_hdr *plcp; + struct ieee80211_mgmt *h; + int hdr_len, body_len; + + hdr_len = D11_PHY_HDR_LEN + DOT11_MAC_HDR_LEN; + + /* calc buffer size provided for frame body */ + body_len = *len - hdr_len; + /* return actual size */ + *len = hdr_len + body_len; + + /* format PHY and MAC headers */ + memset((char *)buf, 0, hdr_len); + + plcp = (struct cck_phy_hdr *) buf; + + /* + * PLCP for Probe Response frames are filled in from + * core's rate table + */ + if (type == IEEE80211_STYPE_BEACON) + /* fill in PLCP */ + brcms_c_compute_plcp(wlc, bcn_rspec, + (DOT11_MAC_HDR_LEN + body_len + FCS_LEN), + (u8 *) plcp); + + /* "Regular" and 16 MBSS but not for 4 MBSS */ + /* Update the phytxctl for the beacon based on the rspec */ + brcms_c_beacon_phytxctl_txant_upd(wlc, bcn_rspec); + + h = (struct ieee80211_mgmt *)&plcp[1]; + + /* fill in 802.11 header */ + h->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | type); + + /* DUR is 0 for multicast bcn, or filled in by MAC for prb resp */ + /* A1 filled in by MAC for prb resp, broadcast for bcn */ + if (type == IEEE80211_STYPE_BEACON) + memcpy(&h->da, ðer_bcast, ETH_ALEN); + memcpy(&h->sa, &cfg->cur_etheraddr, ETH_ALEN); + memcpy(&h->bssid, &cfg->BSSID, ETH_ALEN); + + /* SEQ filled in by MAC */ +} + +int brcms_c_get_header_len(void) +{ + return TXOFF; +} + +/* + * Update all beacons for the system. + */ +void brcms_c_update_beacon(struct brcms_c_info *wlc) +{ + struct brcms_bss_cfg *bsscfg = wlc->bsscfg; + + if (bsscfg->up && !bsscfg->BSS) + /* Clear the soft intmask */ + wlc->defmacintmask &= ~MI_BCNTPL; +} + +/* Write ssid into shared memory */ +static void +brcms_c_shm_ssid_upd(struct brcms_c_info *wlc, struct brcms_bss_cfg *cfg) +{ + u8 *ssidptr = cfg->SSID; + u16 base = M_SSID; + u8 ssidbuf[IEEE80211_MAX_SSID_LEN]; + + /* padding the ssid with zero and copy it into shm */ + memset(ssidbuf, 0, IEEE80211_MAX_SSID_LEN); + memcpy(ssidbuf, ssidptr, cfg->SSID_len); + + brcms_c_copyto_shm(wlc, base, ssidbuf, IEEE80211_MAX_SSID_LEN); + brcms_b_write_shm(wlc->hw, M_SSIDLEN, (u16) cfg->SSID_len); +} + +static void +brcms_c_bss_update_probe_resp(struct brcms_c_info *wlc, + struct brcms_bss_cfg *cfg, + bool suspend) +{ + u16 prb_resp[BCN_TMPL_LEN / 2]; + int len = BCN_TMPL_LEN; + + /* + * write the probe response to hardware, or save in + * the config structure + */ + + /* create the probe response template */ + brcms_c_bcn_prb_template(wlc, IEEE80211_STYPE_PROBE_RESP, 0, + cfg, prb_resp, &len); + + if (suspend) + brcms_c_suspend_mac_and_wait(wlc); + + /* write the probe response into the template region */ + brcms_b_write_template_ram(wlc->hw, T_PRS_TPL_BASE, + (len + 3) & ~3, prb_resp); + + /* write the length of the probe response frame (+PLCP/-FCS) */ + brcms_b_write_shm(wlc->hw, M_PRB_RESP_FRM_LEN, (u16) len); + + /* write the SSID and SSID length */ + brcms_c_shm_ssid_upd(wlc, cfg); + + /* + * Write PLCP headers and durations for probe response frames + * at all rates. Use the actual frame length covered by the + * PLCP header for the call to brcms_c_mod_prb_rsp_rate_table() + * by subtracting the PLCP len and adding the FCS. + */ + len += (-D11_PHY_HDR_LEN + FCS_LEN); + brcms_c_mod_prb_rsp_rate_table(wlc, (u16) len); + + if (suspend) + brcms_c_enable_mac(wlc); +} + +void brcms_c_update_probe_resp(struct brcms_c_info *wlc, bool suspend) +{ + struct brcms_bss_cfg *bsscfg = wlc->bsscfg; + + /* update AP or IBSS probe responses */ + if (bsscfg->up && !bsscfg->BSS) + brcms_c_bss_update_probe_resp(wlc, bsscfg, suspend); +} + +/* prepares pdu for transmission. returns BCM error codes */ +int brcms_c_prep_pdu(struct brcms_c_info *wlc, struct sk_buff *pdu, uint *fifop) +{ + uint fifo; + struct d11txh *txh; + struct ieee80211_hdr *h; + struct scb *scb; + + txh = (struct d11txh *) (pdu->data); + h = (struct ieee80211_hdr *)((u8 *) (txh + 1) + D11_PHY_HDR_LEN); + + /* get the pkt queue info. This was put at brcms_c_sendctl or + * brcms_c_send for PDU */ + fifo = le16_to_cpu(txh->TxFrameID) & TXFID_QUEUE_MASK; + + scb = NULL; + + *fifop = fifo; + + /* return if insufficient dma resources */ + if (*wlc->core->txavail[fifo] < MAX_DMA_SEGS) { + /* Mark precedences related to this FIFO, unsendable */ + /* A fifo is full. Clear precedences related to that FIFO */ + wlc->tx_prec_map &= ~(wlc->fifo2prec_map[fifo]); + return -EBUSY; + } + return 0; +} + +int brcms_b_xmtfifo_sz_get(struct brcms_hardware *wlc_hw, uint fifo, + uint *blocks) +{ + if (fifo >= NFIFO) + return -EINVAL; + + *blocks = wlc_hw->xmtfifo_sz[fifo]; + + return 0; +} + +void +brcms_c_set_addrmatch(struct brcms_c_info *wlc, int match_reg_offset, + const u8 *addr) +{ + brcms_b_set_addrmatch(wlc->hw, match_reg_offset, addr); + if (match_reg_offset == RCM_BSSID_OFFSET) + memcpy(wlc->bsscfg->BSSID, addr, ETH_ALEN); +} + +/* + * Flag 'scan in progress' to withhold dynamic phy calibration + */ +void brcms_c_scan_start(struct brcms_c_info *wlc) +{ + wlc_phy_hold_upd(wlc->band->pi, PHY_HOLD_FOR_SCAN, true); +} + +void brcms_c_scan_stop(struct brcms_c_info *wlc) +{ + wlc_phy_hold_upd(wlc->band->pi, PHY_HOLD_FOR_SCAN, false); +} + +void brcms_c_associate_upd(struct brcms_c_info *wlc, bool state) +{ + wlc->pub->associated = state; + wlc->bsscfg->associated = state; +} + +/* + * When a remote STA/AP is removed by Mac80211, or when it can no longer accept + * AMPDU traffic, packets pending in hardware have to be invalidated so that + * when later on hardware releases them, they can be handled appropriately. + */ +void brcms_c_inval_dma_pkts(struct brcms_hardware *hw, + struct ieee80211_sta *sta, + void (*dma_callback_fn)) +{ + struct dma_pub *dmah; + int i; + for (i = 0; i < NFIFO; i++) { + dmah = hw->di[i]; + if (dmah != NULL) + dma_walk_packets(dmah, dma_callback_fn, sta); + } +} + +int brcms_c_get_curband(struct brcms_c_info *wlc) +{ + return wlc->band->bandunit; +} + +void brcms_c_wait_for_tx_completion(struct brcms_c_info *wlc, bool drop) +{ + /* flush packet queue when requested */ + if (drop) + brcmu_pktq_flush(&wlc->pkt_queue->q, false, NULL, NULL); + + /* wait for queue and DMA fifos to run dry */ + while (!pktq_empty(&wlc->pkt_queue->q) || brcms_txpktpendtot(wlc) > 0) + brcms_msleep(wlc->wl, 1); +} + +void brcms_c_set_beacon_listen_interval(struct brcms_c_info *wlc, u8 interval) +{ + wlc->bcn_li_bcn = interval; + if (wlc->pub->up) + brcms_c_bcn_li_upd(wlc); +} + +int brcms_c_set_tx_power(struct brcms_c_info *wlc, int txpwr) +{ + uint qdbm; + + /* Remove override bit and clip to max qdbm value */ + qdbm = min_t(uint, txpwr * BRCMS_TXPWR_DB_FACTOR, 0xff); + return wlc_phy_txpower_set(wlc->band->pi, qdbm, false); +} + +int brcms_c_get_tx_power(struct brcms_c_info *wlc) +{ + uint qdbm; + bool override; + + wlc_phy_txpower_get(wlc->band->pi, &qdbm, &override); + + /* Return qdbm units */ + return (int)(qdbm / BRCMS_TXPWR_DB_FACTOR); +} + +void brcms_c_set_radio_mpc(struct brcms_c_info *wlc, bool mpc) +{ + wlc->mpc = mpc; + brcms_c_radio_mpc_upd(wlc); +} + +/* Process received frames */ +/* + * Return true if more frames need to be processed. false otherwise. + * Param 'bound' indicates max. # frames to process before break out. + */ +static void brcms_c_recv(struct brcms_c_info *wlc, struct sk_buff *p) +{ + struct d11rxhdr *rxh; + struct ieee80211_hdr *h; + uint len; + bool is_amsdu; + + BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); + + /* frame starts with rxhdr */ + rxh = (struct d11rxhdr *) (p->data); + + /* strip off rxhdr */ + skb_pull(p, BRCMS_HWRXOFF); + + /* MAC inserts 2 pad bytes for a4 headers or QoS or A-MSDU subframes */ + if (rxh->RxStatus1 & RXS_PBPRES) { + if (p->len < 2) { + wiphy_err(wlc->wiphy, "wl%d: recv: rcvd runt of " + "len %d\n", wlc->pub->unit, p->len); + goto toss; + } + skb_pull(p, 2); + } + + h = (struct ieee80211_hdr *)(p->data + D11_PHY_HDR_LEN); + len = p->len; + + if (rxh->RxStatus1 & RXS_FCSERR) { + if (wlc->pub->mac80211_state & MAC80211_PROMISC_BCNS) { + wiphy_err(wlc->wiphy, "FCSERR while scanning******* -" + " tossing\n"); + goto toss; + } else { + wiphy_err(wlc->wiphy, "RCSERR!!!\n"); + goto toss; + } + } + + /* check received pkt has at least frame control field */ + if (len < D11_PHY_HDR_LEN + sizeof(h->frame_control)) + goto toss; + + /* not supporting A-MSDU */ + is_amsdu = rxh->RxStatus2 & RXS_AMSDU_MASK; + if (is_amsdu) + goto toss; + + brcms_c_recvctl(wlc, rxh, p); + return; + + toss: + brcmu_pkt_buf_free_skb(p); +} + +/* Process received frames */ +/* + * Return true if more frames need to be processed. false otherwise. + * Param 'bound' indicates max. # frames to process before break out. + */ +static bool +brcms_b_recv(struct brcms_hardware *wlc_hw, uint fifo, bool bound) +{ + struct sk_buff *p; + struct sk_buff *head = NULL; + struct sk_buff *tail = NULL; + uint n = 0; + uint bound_limit = bound ? RXBND : -1; + + BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit); + /* gather received frames */ + while ((p = dma_rx(wlc_hw->di[fifo]))) { + + if (!tail) + head = tail = p; + else { + tail->prev = p; + tail = p; + } + + /* !give others some time to run! */ + if (++n >= bound_limit) + break; + } + + /* post more rbufs */ + dma_rxfill(wlc_hw->di[fifo]); + + /* process each frame */ + while ((p = head) != NULL) { + struct d11rxhdr_le *rxh_le; + struct d11rxhdr *rxh; + head = head->prev; + p->prev = NULL; + + rxh_le = (struct d11rxhdr_le *)p->data; + rxh = (struct d11rxhdr *)p->data; + + /* fixup rx header endianness */ + rxh->RxFrameSize = le16_to_cpu(rxh_le->RxFrameSize); + rxh->PhyRxStatus_0 = le16_to_cpu(rxh_le->PhyRxStatus_0); + rxh->PhyRxStatus_1 = le16_to_cpu(rxh_le->PhyRxStatus_1); + rxh->PhyRxStatus_2 = le16_to_cpu(rxh_le->PhyRxStatus_2); + rxh->PhyRxStatus_3 = le16_to_cpu(rxh_le->PhyRxStatus_3); + rxh->PhyRxStatus_4 = le16_to_cpu(rxh_le->PhyRxStatus_4); + rxh->PhyRxStatus_5 = le16_to_cpu(rxh_le->PhyRxStatus_5); + rxh->RxStatus1 = le16_to_cpu(rxh_le->RxStatus1); + rxh->RxStatus2 = le16_to_cpu(rxh_le->RxStatus2); + rxh->RxTSFTime = le16_to_cpu(rxh_le->RxTSFTime); + rxh->RxChan = le16_to_cpu(rxh_le->RxChan); + + brcms_c_recv(wlc_hw->wlc, p); + } + + return n >= bound_limit; +} + +/* second-level interrupt processing + * Return true if another dpc needs to be re-scheduled. false otherwise. + * Param 'bounded' indicates if applicable loops should be bounded. + */ +bool brcms_c_dpc(struct brcms_c_info *wlc, bool bounded) +{ + u32 macintstatus; + struct brcms_hardware *wlc_hw = wlc->hw; + struct d11regs __iomem *regs = wlc_hw->regs; + struct wiphy *wiphy = wlc->wiphy; + + if (brcms_deviceremoved(wlc)) { + wiphy_err(wiphy, "wl%d: %s: dead chip\n", wlc_hw->unit, + __func__); + brcms_down(wlc->wl); + return false; + } + + /* grab and clear the saved software intstatus bits */ + macintstatus = wlc->macintstatus; + wlc->macintstatus = 0; + + BCMMSG(wlc->wiphy, "wl%d: macintstatus 0x%x\n", + wlc_hw->unit, macintstatus); + + WARN_ON(macintstatus & MI_PRQ); /* PRQ Interrupt in non-MBSS */ + + /* tx status */ + if (macintstatus & MI_TFS) { + bool fatal; + if (brcms_b_txstatus(wlc->hw, bounded, &fatal)) + wlc->macintstatus |= MI_TFS; + if (fatal) { + wiphy_err(wiphy, "MI_TFS: fatal\n"); + goto fatal; + } + } + + if (macintstatus & (MI_TBTT | MI_DTIM_TBTT)) + brcms_c_tbtt(wlc); + + /* ATIM window end */ + if (macintstatus & MI_ATIMWINEND) { + BCMMSG(wlc->wiphy, "end of ATIM window\n"); + OR_REG(®s->maccommand, wlc->qvalid); + wlc->qvalid = 0; + } + + /* + * received data or control frame, MI_DMAINT is + * indication of RX_FIFO interrupt + */ + if (macintstatus & MI_DMAINT) + if (brcms_b_recv(wlc_hw, RX_FIFO, bounded)) + wlc->macintstatus |= MI_DMAINT; + + /* noise sample collected */ + if (macintstatus & MI_BG_NOISE) + wlc_phy_noise_sample_intr(wlc_hw->band->pi); + + if (macintstatus & MI_GP0) { + wiphy_err(wiphy, "wl%d: PSM microcode watchdog fired at %d " + "(seconds). Resetting.\n", wlc_hw->unit, wlc_hw->now); + + printk_once("%s : PSM Watchdog, chipid 0x%x, chiprev 0x%x\n", + __func__, wlc_hw->sih->chip, + wlc_hw->sih->chiprev); + /* big hammer */ + brcms_init(wlc->wl); + } + + /* gptimer timeout */ + if (macintstatus & MI_TO) + W_REG(®s->gptimer, 0); + + if (macintstatus & MI_RFDISABLE) { + BCMMSG(wlc->wiphy, "wl%d: BMAC Detected a change on the" + " RF Disable Input\n", wlc_hw->unit); + brcms_rfkill_set_hw_state(wlc->wl); + } + + /* send any enq'd tx packets. Just makes sure to jump start tx */ + if (!pktq_empty(&wlc->pkt_queue->q)) + brcms_c_send_q(wlc); + + /* it isn't done and needs to be resched if macintstatus is non-zero */ + return wlc->macintstatus != 0; + + fatal: + brcms_init(wlc->wl); + return wlc->macintstatus != 0; +} + +void brcms_c_init(struct brcms_c_info *wlc) +{ + struct d11regs __iomem *regs; + u16 chanspec; + bool mute = false; + + BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); + + regs = wlc->regs; + + /* + * This will happen if a big-hammer was executed. In + * that case, we want to go back to the channel that + * we were on and not new channel + */ + if (wlc->pub->associated) + chanspec = wlc->home_chanspec; + else + chanspec = brcms_c_init_chanspec(wlc); + + brcms_b_init(wlc->hw, chanspec, mute); + + /* update beacon listen interval */ + brcms_c_bcn_li_upd(wlc); + + /* write ethernet address to core */ + brcms_c_set_mac(wlc->bsscfg); + brcms_c_set_bssid(wlc->bsscfg); + + /* Update tsf_cfprep if associated and up */ + if (wlc->pub->associated && wlc->bsscfg->up) { + u32 bi; + + /* get beacon period and convert to uS */ + bi = wlc->bsscfg->current_bss->beacon_period << 10; + /* + * update since init path would reset + * to default value + */ + W_REG(®s->tsf_cfprep, + (bi << CFPREP_CBI_SHIFT)); + + /* Update maccontrol PM related bits */ + brcms_c_set_ps_ctrl(wlc); + } + + brcms_c_bandinit_ordered(wlc, chanspec); + + /* init probe response timeout */ + brcms_b_write_shm(wlc->hw, M_PRS_MAXTIME, wlc->prb_resp_timeout); + + /* init max burst txop (framebursting) */ + brcms_b_write_shm(wlc->hw, M_MBURST_TXOP, + (wlc-> + _rifs ? (EDCF_AC_VO_TXOP_AP << 5) : MAXFRAMEBURST_TXOP)); + + /* initialize maximum allowed duty cycle */ + brcms_c_duty_cycle_set(wlc, wlc->tx_duty_cycle_ofdm, true, true); + brcms_c_duty_cycle_set(wlc, wlc->tx_duty_cycle_cck, false, true); + + /* + * Update some shared memory locations related to + * max AMPDU size allowed to received + */ + brcms_c_ampdu_shm_upd(wlc->ampdu); + + /* band-specific inits */ + brcms_c_bsinit(wlc); + + /* Enable EDCF mode (while the MAC is suspended) */ + OR_REG(®s->ifs_ctl, IFS_USEEDCF); + brcms_c_edcf_setparams(wlc, false); + + /* Init precedence maps for empty FIFOs */ + brcms_c_tx_prec_map_init(wlc); + + /* read the ucode version if we have not yet done so */ + if (wlc->ucode_rev == 0) { + wlc->ucode_rev = + brcms_b_read_shm(wlc->hw, M_BOM_REV_MAJOR) << NBITS(u16); + wlc->ucode_rev |= brcms_b_read_shm(wlc->hw, M_BOM_REV_MINOR); + } + + /* ..now really unleash hell (allow the MAC out of suspend) */ + brcms_c_enable_mac(wlc); + + /* clear tx flow control */ + brcms_c_txflowcontrol_reset(wlc); + + /* enable the RF Disable Delay timer */ + W_REG(&wlc->regs->rfdisabledly, RFDISABLE_DEFAULT); + + /* initialize mpc delay */ + wlc->mpc_delay_off = wlc->mpc_dlycnt = BRCMS_MPC_MIN_DELAYCNT; + + /* + * Initialize WME parameters; if they haven't been set by some other + * mechanism (IOVar, etc) then read them from the hardware. + */ + if (GFIELD(wlc->wme_retries[0], EDCF_SHORT) == 0) { + /* Uninitialized; read from HW */ + int ac; + + for (ac = 0; ac < AC_COUNT; ac++) + wlc->wme_retries[ac] = + brcms_b_read_shm(wlc->hw, M_AC_TXLMT_ADDR(ac)); + } +} + +/* + * The common driver entry routine. Error codes should be unique + */ +struct brcms_c_info * +brcms_c_attach(struct brcms_info *wl, u16 vendor, u16 device, uint unit, + bool piomode, void __iomem *regsva, struct pci_dev *btparam, + uint *perr) +{ + struct brcms_c_info *wlc; + uint err = 0; + uint i, j; + struct brcms_pub *pub; + + /* allocate struct brcms_c_info state and its substructures */ + wlc = (struct brcms_c_info *) brcms_c_attach_malloc(unit, &err, device); + if (wlc == NULL) + goto fail; + wlc->wiphy = wl->wiphy; + pub = wlc->pub; + +#if defined(BCMDBG) + wlc_info_dbg = wlc; +#endif + + wlc->band = wlc->bandstate[0]; + wlc->core = wlc->corestate; + wlc->wl = wl; + pub->unit = unit; + pub->_piomode = piomode; + wlc->bandinit_pending = false; + + /* populate struct brcms_c_info with default values */ + brcms_c_info_init(wlc, unit); + + /* update sta/ap related parameters */ + brcms_c_ap_upd(wlc); + + /* + * low level attach steps(all hw accesses go + * inside, no more in rest of the attach) + */ + err = brcms_b_attach(wlc, vendor, device, unit, piomode, regsva, + btparam); + if (err) + goto fail; + + brcms_c_protection_upd(wlc, BRCMS_PROT_N_PAM_OVR, OFF); + + pub->phy_11ncapable = BRCMS_PHY_11N_CAP(wlc->band); + + /* disable allowed duty cycle */ + wlc->tx_duty_cycle_ofdm = 0; + wlc->tx_duty_cycle_cck = 0; + + brcms_c_stf_phy_chain_calc(wlc); + + /* txchain 1: txant 0, txchain 2: txant 1 */ + if (BRCMS_ISNPHY(wlc->band) && (wlc->stf->txstreams == 1)) + wlc->stf->txant = wlc->stf->hw_txchain - 1; + + /* push to BMAC driver */ + wlc_phy_stf_chain_init(wlc->band->pi, wlc->stf->hw_txchain, + wlc->stf->hw_rxchain); + + /* pull up some info resulting from the low attach */ + for (i = 0; i < NFIFO; i++) + wlc->core->txavail[i] = wlc->hw->txavail[i]; + + memcpy(&wlc->perm_etheraddr, &wlc->hw->etheraddr, ETH_ALEN); + memcpy(&pub->cur_etheraddr, &wlc->hw->etheraddr, ETH_ALEN); + + for (j = 0; j < wlc->pub->_nbands; j++) { + wlc->band = wlc->bandstate[j]; + + if (!brcms_c_attach_stf_ant_init(wlc)) { + err = 24; + goto fail; + } + + /* default contention windows size limits */ + wlc->band->CWmin = APHY_CWMIN; + wlc->band->CWmax = PHY_CWMAX; + + /* init gmode value */ + if (wlc->band->bandtype == BRCM_BAND_2G) { + wlc->band->gmode = GMODE_AUTO; + brcms_c_protection_upd(wlc, BRCMS_PROT_G_USER, + wlc->band->gmode); + } + + /* init _n_enab supported mode */ + if (BRCMS_PHY_11N_CAP(wlc->band)) { + pub->_n_enab = SUPPORT_11N; + brcms_c_protection_upd(wlc, BRCMS_PROT_N_USER, + ((pub->_n_enab == + SUPPORT_11N) ? WL_11N_2x2 : + WL_11N_3x3)); + } + + /* init per-band default rateset, depend on band->gmode */ + brcms_default_rateset(wlc, &wlc->band->defrateset); + + /* fill in hw_rateset */ + brcms_c_rateset_filter(&wlc->band->defrateset, + &wlc->band->hw_rateset, false, + BRCMS_RATES_CCK_OFDM, BRCMS_RATE_MASK, + (bool) (wlc->pub->_n_enab & SUPPORT_11N)); + } + + /* + * update antenna config due to + * wlc->stf->txant/txchain/ant_rx_ovr change + */ + brcms_c_stf_phy_txant_upd(wlc); + + /* attach each modules */ + err = brcms_c_attach_module(wlc); + if (err != 0) + goto fail; + + if (!brcms_c_timers_init(wlc, unit)) { + wiphy_err(wl->wiphy, "wl%d: %s: init_timer failed\n", unit, + __func__); + err = 32; + goto fail; + } + + /* depend on rateset, gmode */ + wlc->cmi = brcms_c_channel_mgr_attach(wlc); + if (!wlc->cmi) { + wiphy_err(wl->wiphy, "wl%d: %s: channel_mgr_attach failed" + "\n", unit, __func__); + err = 33; + goto fail; + } + + /* init default when all parameters are ready, i.e. ->rateset */ + brcms_c_bss_default_init(wlc); + + /* + * Complete the wlc default state initializations.. + */ + + /* allocate our initial queue */ + wlc->pkt_queue = brcms_c_txq_alloc(wlc); + if (wlc->pkt_queue == NULL) { + wiphy_err(wl->wiphy, "wl%d: %s: failed to malloc tx queue\n", + unit, __func__); + err = 100; + goto fail; + } + + wlc->bsscfg->wlc = wlc; + + wlc->mimoft = FT_HT; + wlc->mimo_40txbw = AUTO; + wlc->ofdm_40txbw = AUTO; + wlc->cck_40txbw = AUTO; + brcms_c_update_mimo_band_bwcap(wlc, BRCMS_N_BW_20IN2G_40IN5G); + + /* Set default values of SGI */ + if (BRCMS_SGI_CAP_PHY(wlc)) { + brcms_c_ht_update_sgi_rx(wlc, (BRCMS_N_SGI_20 | + BRCMS_N_SGI_40)); + } else if (BRCMS_ISSSLPNPHY(wlc->band)) { + brcms_c_ht_update_sgi_rx(wlc, (BRCMS_N_SGI_20 | + BRCMS_N_SGI_40)); + } else { + brcms_c_ht_update_sgi_rx(wlc, 0); + } + + /* initialize radio_mpc_disable according to wlc->mpc */ + brcms_c_radio_mpc_upd(wlc); + brcms_b_antsel_set(wlc->hw, wlc->asi->antsel_avail); + + if (perr) + *perr = 0; + + return wlc; + + fail: + wiphy_err(wl->wiphy, "wl%d: %s: failed with err %d\n", + unit, __func__, err); + if (wlc) + brcms_c_detach(wlc); + + if (perr) + *perr = err; + return NULL; +} |