diff options
Diffstat (limited to 'drivers/net/bfin_mac.c')
| -rw-r--r-- | drivers/net/bfin_mac.c | 311 |
1 files changed, 187 insertions, 124 deletions
diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c index 5cb4433d5612..53fe7ded5d50 100644 --- a/drivers/net/bfin_mac.c +++ b/drivers/net/bfin_mac.c @@ -47,6 +47,7 @@ #include <linux/spinlock.h> #include <linux/ethtool.h> #include <linux/mii.h> +#include <linux/phy.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/skbuff.h> @@ -94,6 +95,9 @@ static struct net_dma_desc_tx *current_tx_ptr; static struct net_dma_desc_tx *tx_desc; static struct net_dma_desc_rx *rx_desc; +static void bf537mac_disable(void); +static void bf537mac_enable(void); + static void desc_list_free(void) { struct net_dma_desc_rx *r; @@ -282,8 +286,11 @@ static int setup_pin_mux(int action) return 0; } +/* + * MII operations + */ /* Wait until the previous MDC/MDIO transaction has completed */ -static void poll_mdc_done(void) +static void mdio_poll(void) { int timeout_cnt = MAX_TIMEOUT_CNT; @@ -299,154 +306,201 @@ static void poll_mdc_done(void) } /* Read an off-chip register in a PHY through the MDC/MDIO port */ -static u16 read_phy_reg(u16 PHYAddr, u16 RegAddr) +static int mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum) { - poll_mdc_done(); + mdio_poll(); + /* read mode */ - bfin_write_EMAC_STAADD(SET_PHYAD(PHYAddr) | - SET_REGAD(RegAddr) | + bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) | + SET_REGAD((u16) regnum) | STABUSY); - poll_mdc_done(); - return (u16) bfin_read_EMAC_STADAT(); + mdio_poll(); + + return (int) bfin_read_EMAC_STADAT(); } /* Write an off-chip register in a PHY through the MDC/MDIO port */ -static void raw_write_phy_reg(u16 PHYAddr, u16 RegAddr, u32 Data) +static int mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum, + u16 value) { - bfin_write_EMAC_STADAT(Data); + mdio_poll(); + + bfin_write_EMAC_STADAT((u32) value); /* write mode */ - bfin_write_EMAC_STAADD(SET_PHYAD(PHYAddr) | - SET_REGAD(RegAddr) | + bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) | + SET_REGAD((u16) regnum) | STAOP | STABUSY); - poll_mdc_done(); + mdio_poll(); + + return 0; } -static void write_phy_reg(u16 PHYAddr, u16 RegAddr, u32 Data) +static int mdiobus_reset(struct mii_bus *bus) { - poll_mdc_done(); - raw_write_phy_reg(PHYAddr, RegAddr, Data); + return 0; } -/* set up the phy */ -static void bf537mac_setphy(struct net_device *dev) +static void bf537_adjust_link(struct net_device *dev) { - u16 phydat; struct bf537mac_local *lp = netdev_priv(dev); + struct phy_device *phydev = lp->phydev; + unsigned long flags; + int new_state = 0; + + spin_lock_irqsave(&lp->lock, flags); + if (phydev->link) { + /* Now we make sure that we can be in full duplex mode. + * If not, we operate in half-duplex mode. */ + if (phydev->duplex != lp->old_duplex) { + u32 opmode = bfin_read_EMAC_OPMODE(); + new_state = 1; + + if (phydev->duplex) + opmode |= FDMODE; + else + opmode &= ~(FDMODE); + + bfin_write_EMAC_OPMODE(opmode); + lp->old_duplex = phydev->duplex; + } - /* Program PHY registers */ - pr_debug("start setting up phy\n"); - - /* issue a reset */ - raw_write_phy_reg(lp->PhyAddr, PHYREG_MODECTL, 0x8000); - - /* wait half a second */ - msleep(500); - - phydat = read_phy_reg(lp->PhyAddr, PHYREG_MODECTL); - - /* advertise flow control supported */ - phydat = read_phy_reg(lp->PhyAddr, PHYREG_ANAR); - phydat |= (1 << 10); - write_phy_reg(lp->PhyAddr, PHYREG_ANAR, phydat); + if (phydev->speed != lp->old_speed) { +#if defined(CONFIG_BFIN_MAC_RMII) + u32 opmode = bfin_read_EMAC_OPMODE(); + bf537mac_disable(); + switch (phydev->speed) { + case 10: + opmode |= RMII_10; + break; + case 100: + opmode &= ~(RMII_10); + break; + default: + printk(KERN_WARNING + "%s: Ack! Speed (%d) is not 10/100!\n", + DRV_NAME, phydev->speed); + break; + } + bfin_write_EMAC_OPMODE(opmode); + bf537mac_enable(); +#endif - phydat = 0; - if (lp->Negotiate) - phydat |= 0x1000; /* enable auto negotiation */ - else { - if (lp->FullDuplex) - phydat |= (1 << 8); /* full duplex */ - else - phydat &= (~(1 << 8)); /* half duplex */ + new_state = 1; + lp->old_speed = phydev->speed; + } - if (!lp->Port10) - phydat |= (1 << 13); /* 100 Mbps */ - else - phydat &= (~(1 << 13)); /* 10 Mbps */ + if (!lp->old_link) { + new_state = 1; + lp->old_link = 1; + netif_schedule(dev); + } + } else if (lp->old_link) { + new_state = 1; + lp->old_link = 0; + lp->old_speed = 0; + lp->old_duplex = -1; } - if (lp->Loopback) - phydat |= (1 << 14); /* enable TX->RX loopback */ - - write_phy_reg(lp->PhyAddr, PHYREG_MODECTL, phydat); - msleep(500); - - phydat = read_phy_reg(lp->PhyAddr, PHYREG_MODECTL); - /* check for SMSC PHY */ - if ((read_phy_reg(lp->PhyAddr, PHYREG_PHYID1) == 0x7) && - ((read_phy_reg(lp->PhyAddr, PHYREG_PHYID2) & 0xfff0) == 0xC0A0)) { - /* - * we have SMSC PHY so reqest interrupt - * on link down condition - */ - - /* enable interrupts */ - write_phy_reg(lp->PhyAddr, 30, 0x0ff); + if (new_state) { + u32 opmode = bfin_read_EMAC_OPMODE(); + phy_print_status(phydev); + pr_debug("EMAC_OPMODE = 0x%08x\n", opmode); } + + spin_unlock_irqrestore(&lp->lock, flags); } -/**************************************************************************/ -void setup_system_regs(struct net_device *dev) +static int mii_probe(struct net_device *dev) { - int phyaddr; - unsigned short sysctl, phydat; - u32 opmode; struct bf537mac_local *lp = netdev_priv(dev); - int count = 0; - - phyaddr = lp->PhyAddr; + struct phy_device *phydev = NULL; + unsigned short sysctl; + int i; - /* Enable PHY output */ + /* Enable PHY output early */ if (!(bfin_read_VR_CTL() & PHYCLKOE)) bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE); /* MDC = 2.5 MHz */ - sysctl = SET_MDCDIV(24); - /* Odd word alignment for Receive Frame DMA word */ - /* Configure checksum support and rcve frame word alignment */ -#if defined(BFIN_MAC_CSUM_OFFLOAD) - sysctl |= RXDWA | RXCKS; -#else - sysctl |= RXDWA; -#endif + sysctl = bfin_read_EMAC_SYSCTL(); + sysctl |= SET_MDCDIV(24); bfin_write_EMAC_SYSCTL(sysctl); - /* auto negotiation on */ - /* full duplex */ - /* 100 Mbps */ - phydat = PHY_ANEG_EN | PHY_DUPLEX | PHY_SPD_SET; - write_phy_reg(phyaddr, PHYREG_MODECTL, phydat); - /* test if full duplex supported */ - do { - msleep(100); - phydat = read_phy_reg(phyaddr, PHYREG_MODESTAT); - if (count > 30) { - printk(KERN_NOTICE DRV_NAME ": Link is down\n"); - printk(KERN_NOTICE DRV_NAME - "please check your network connection\n"); - break; - } - count++; - } while (!(phydat & 0x0004)); + /* search for connect PHY device */ + for (i = 0; i < PHY_MAX_ADDR; i++) { + struct phy_device *const tmp_phydev = lp->mii_bus.phy_map[i]; - phydat = read_phy_reg(phyaddr, PHYREG_ANLPAR); + if (!tmp_phydev) + continue; /* no PHY here... */ - if ((phydat & 0x0100) || (phydat & 0x0040)) { - opmode = FDMODE; - } else { - opmode = 0; - printk(KERN_INFO DRV_NAME - ": Network is set to half duplex\n"); + phydev = tmp_phydev; + break; /* found it */ + } + + /* now we are supposed to have a proper phydev, to attach to... */ + if (!phydev) { + printk(KERN_INFO "%s: Don't found any phy device at all\n", + dev->name); + return -ENODEV; } #if defined(CONFIG_BFIN_MAC_RMII) - opmode |= RMII; /* For Now only 100MBit are supported */ + phydev = phy_connect(dev, phydev->dev.bus_id, &bf537_adjust_link, 0, + PHY_INTERFACE_MODE_RMII); +#else + phydev = phy_connect(dev, phydev->dev.bus_id, &bf537_adjust_link, 0, + PHY_INTERFACE_MODE_MII); #endif - bfin_write_EMAC_OPMODE(opmode); + if (IS_ERR(phydev)) { + printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name); + return PTR_ERR(phydev); + } + + /* mask with MAC supported features */ + phydev->supported &= (SUPPORTED_10baseT_Half + | SUPPORTED_10baseT_Full + | SUPPORTED_100baseT_Half + | SUPPORTED_100baseT_Full + | SUPPORTED_Autoneg + | SUPPORTED_Pause | SUPPORTED_Asym_Pause + | SUPPORTED_MII + | SUPPORTED_TP); + + phydev->advertising = phydev->supported; + + lp->old_link = 0; + lp->old_speed = 0; + lp->old_duplex = -1; + lp->phydev = phydev; + + printk(KERN_INFO "%s: attached PHY driver [%s] " + "(mii_bus:phy_addr=%s, irq=%d)\n", + DRV_NAME, phydev->drv->name, phydev->dev.bus_id, phydev->irq); + + return 0; +} + +/**************************************************************************/ +void setup_system_regs(struct net_device *dev) +{ + unsigned short sysctl; + + /* + * Odd word alignment for Receive Frame DMA word + * Configure checksum support and rcve frame word alignment + */ + sysctl = bfin_read_EMAC_SYSCTL(); +#if defined(BFIN_MAC_CSUM_OFFLOAD) + sysctl |= RXDWA | RXCKS; +#else + sysctl |= RXDWA; +#endif + bfin_write_EMAC_SYSCTL(sysctl); bfin_write_EMAC_MMC_CTL(RSTC | CROLL); @@ -686,18 +740,18 @@ static void bf537mac_disable(void) /* * Enable Interrupts, Receive, and Transmit */ -static int bf537mac_enable(struct net_device *dev) +static void bf537mac_enable(void) { u32 opmode; - pr_debug("%s: %s\n", dev->name, __FUNCTION__); + pr_debug("%s: %s\n", DRV_NAME, __FUNCTION__); /* Set RX DMA */ bfin_write_DMA1_NEXT_DESC_PTR(&(rx_list_head->desc_a)); bfin_write_DMA1_CONFIG(rx_list_head->desc_a.config); /* Wait MII done */ - poll_mdc_done(); + mdio_poll(); /* We enable only RX here */ /* ASTP : Enable Automatic Pad Stripping @@ -721,8 +775,6 @@ static int bf537mac_enable(struct net_device *dev) #endif /* Turn on the EMAC rx */ bfin_write_EMAC_OPMODE(opmode); - - return 0; } /* Our watchdog timed out. Called by the networking layer */ @@ -735,7 +787,7 @@ static void bf537mac_timeout(struct net_device *dev) /* reset tx queue */ tx_list_tail = tx_list_head->next; - bf537mac_enable(dev); + bf537mac_enable(); /* We can accept TX packets again */ dev->trans_start = jiffies; @@ -789,6 +841,7 @@ static void bf537mac_shutdown(struct net_device *dev) */ static int bf537mac_open(struct net_device *dev) { + struct bf537mac_local *lp = netdev_priv(dev); int retval; pr_debug("%s: %s\n", dev->name, __FUNCTION__); @@ -808,10 +861,10 @@ static int bf537mac_open(struct net_device *dev) if (retval) return retval; - bf537mac_setphy(dev); + phy_start(lp->phydev); setup_system_regs(dev); bf537mac_disable(); - bf537mac_enable(dev); + bf537mac_enable(); pr_debug("hardware init finished\n"); netif_start_queue(dev); @@ -828,11 +881,14 @@ static int bf537mac_open(struct net_device *dev) */ static int bf537mac_close(struct net_device *dev) { + struct bf537mac_local *lp = netdev_priv(dev); pr_debug("%s: %s\n", dev->name, __FUNCTION__); netif_stop_queue(dev); netif_carrier_off(dev); + phy_stop(lp->phydev); + /* clear everything */ bf537mac_shutdown(dev); @@ -846,6 +902,7 @@ static int __init bf537mac_probe(struct net_device *dev) { struct bf537mac_local *lp = netdev_priv(dev); int retval; + int i; /* Grab the MAC address in the MAC */ *(__le32 *) (&(dev->dev_addr[0])) = cpu_to_le32(bfin_read_EMAC_ADDRLO()); @@ -862,7 +919,6 @@ static int __init bf537mac_probe(struct net_device *dev) /* set the GPIO pins to Ethernet mode */ retval = setup_pin_mux(1); - if (retval) return retval; @@ -880,6 +936,23 @@ static int __init bf537mac_probe(struct net_device *dev) setup_mac_addr(dev->dev_addr); + /* MDIO bus initial */ + lp->mii_bus.priv = dev; + lp->mii_bus.read = mdiobus_read; + lp->mii_bus.write = mdiobus_write; + lp->mii_bus.reset = mdiobus_reset; + lp->mii_bus.name = "bfin_mac_mdio"; + lp->mii_bus.id = 0; + lp->mii_bus.irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL); + for (i = 0; i < PHY_MAX_ADDR; ++i) + lp->mii_bus.irq[i] = PHY_POLL; + + mdiobus_register(&lp->mii_bus); + + retval = mii_probe(dev); + if (retval) + return retval; + /* Fill in the fields of the device structure with ethernet values. */ ether_setup(dev); @@ -893,13 +966,6 @@ static int __init bf537mac_probe(struct net_device *dev) dev->poll_controller = bf537mac_poll; #endif - /* fill in some of the fields */ - lp->version = 1; - lp->PhyAddr = 0x01; - lp->CLKIN = 25; - lp->FullDuplex = 0; - lp->Negotiate = 1; - lp->FlowControl = 0; spin_lock_init(&lp->lock); /* now, enable interrupts */ @@ -912,9 +978,6 @@ static int __init bf537mac_probe(struct net_device *dev) return -EBUSY; } - /* Enable PHY output early */ - if (!(bfin_read_VR_CTL() & PHYCLKOE)) - bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE); retval = register_netdev(dev); if (retval == 0) { |