// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2020 Synopsys, Inc. and/or its affiliates. * Synopsys DesignWare XPCS helpers * * Author: Jose Abreu */ #include #include #include #include #include #include #include #include "pcs-xpcs.h" #define phylink_pcs_to_xpcs(pl_pcs) \ container_of((pl_pcs), struct dw_xpcs, pcs) static const int xpcs_usxgmii_features[] = { ETHTOOL_LINK_MODE_Pause_BIT, ETHTOOL_LINK_MODE_Asym_Pause_BIT, ETHTOOL_LINK_MODE_Autoneg_BIT, ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, ETHTOOL_LINK_MODE_2500baseX_Full_BIT, __ETHTOOL_LINK_MODE_MASK_NBITS, }; static const int xpcs_10gkr_features[] = { ETHTOOL_LINK_MODE_Pause_BIT, ETHTOOL_LINK_MODE_Asym_Pause_BIT, ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, __ETHTOOL_LINK_MODE_MASK_NBITS, }; static const int xpcs_xlgmii_features[] = { ETHTOOL_LINK_MODE_Pause_BIT, ETHTOOL_LINK_MODE_Asym_Pause_BIT, ETHTOOL_LINK_MODE_25000baseCR_Full_BIT, ETHTOOL_LINK_MODE_25000baseKR_Full_BIT, ETHTOOL_LINK_MODE_25000baseSR_Full_BIT, ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT, ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT, ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT, ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT, ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT, ETHTOOL_LINK_MODE_50000baseKR_Full_BIT, ETHTOOL_LINK_MODE_50000baseSR_Full_BIT, ETHTOOL_LINK_MODE_50000baseCR_Full_BIT, ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT, ETHTOOL_LINK_MODE_50000baseDR_Full_BIT, ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT, ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT, ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT, ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT, ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT, ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT, ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT, __ETHTOOL_LINK_MODE_MASK_NBITS, }; static const int xpcs_10gbaser_features[] = { ETHTOOL_LINK_MODE_Pause_BIT, ETHTOOL_LINK_MODE_Asym_Pause_BIT, ETHTOOL_LINK_MODE_10000baseSR_Full_BIT, ETHTOOL_LINK_MODE_10000baseLR_Full_BIT, ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT, ETHTOOL_LINK_MODE_10000baseER_Full_BIT, __ETHTOOL_LINK_MODE_MASK_NBITS, }; static const int xpcs_sgmii_features[] = { ETHTOOL_LINK_MODE_Pause_BIT, ETHTOOL_LINK_MODE_Asym_Pause_BIT, ETHTOOL_LINK_MODE_Autoneg_BIT, ETHTOOL_LINK_MODE_10baseT_Half_BIT, ETHTOOL_LINK_MODE_10baseT_Full_BIT, ETHTOOL_LINK_MODE_100baseT_Half_BIT, ETHTOOL_LINK_MODE_100baseT_Full_BIT, ETHTOOL_LINK_MODE_1000baseT_Half_BIT, ETHTOOL_LINK_MODE_1000baseT_Full_BIT, __ETHTOOL_LINK_MODE_MASK_NBITS, }; static const int xpcs_1000basex_features[] = { ETHTOOL_LINK_MODE_Pause_BIT, ETHTOOL_LINK_MODE_Asym_Pause_BIT, ETHTOOL_LINK_MODE_Autoneg_BIT, ETHTOOL_LINK_MODE_1000baseX_Full_BIT, __ETHTOOL_LINK_MODE_MASK_NBITS, }; static const int xpcs_2500basex_features[] = { ETHTOOL_LINK_MODE_Pause_BIT, ETHTOOL_LINK_MODE_Asym_Pause_BIT, ETHTOOL_LINK_MODE_Autoneg_BIT, ETHTOOL_LINK_MODE_2500baseX_Full_BIT, ETHTOOL_LINK_MODE_2500baseT_Full_BIT, __ETHTOOL_LINK_MODE_MASK_NBITS, }; struct dw_xpcs_compat { phy_interface_t interface; const int *supported; int an_mode; int (*pma_config)(struct dw_xpcs *xpcs); }; struct dw_xpcs_desc { u32 id; u32 mask; const struct dw_xpcs_compat *compat; }; static const struct dw_xpcs_compat * xpcs_find_compat(struct dw_xpcs *xpcs, phy_interface_t interface) { const struct dw_xpcs_compat *compat; for (compat = xpcs->desc->compat; compat->supported; compat++) if (compat->interface == interface) return compat; return NULL; } struct phylink_pcs *xpcs_to_phylink_pcs(struct dw_xpcs *xpcs) { return &xpcs->pcs; } EXPORT_SYMBOL_GPL(xpcs_to_phylink_pcs); int xpcs_get_an_mode(struct dw_xpcs *xpcs, phy_interface_t interface) { const struct dw_xpcs_compat *compat; compat = xpcs_find_compat(xpcs, interface); if (!compat) return -ENODEV; return compat->an_mode; } EXPORT_SYMBOL_GPL(xpcs_get_an_mode); static bool __xpcs_linkmode_supported(const struct dw_xpcs_compat *compat, enum ethtool_link_mode_bit_indices linkmode) { int i; for (i = 0; compat->supported[i] != __ETHTOOL_LINK_MODE_MASK_NBITS; i++) if (compat->supported[i] == linkmode) return true; return false; } #define xpcs_linkmode_supported(compat, mode) \ __xpcs_linkmode_supported(compat, ETHTOOL_LINK_MODE_ ## mode ## _BIT) int xpcs_read(struct dw_xpcs *xpcs, int dev, u32 reg) { return mdiodev_c45_read(xpcs->mdiodev, dev, reg); } int xpcs_write(struct dw_xpcs *xpcs, int dev, u32 reg, u16 val) { return mdiodev_c45_write(xpcs->mdiodev, dev, reg, val); } int xpcs_modify(struct dw_xpcs *xpcs, int dev, u32 reg, u16 mask, u16 set) { return mdiodev_c45_modify(xpcs->mdiodev, dev, reg, mask, set); } static int xpcs_modify_changed(struct dw_xpcs *xpcs, int dev, u32 reg, u16 mask, u16 set) { return mdiodev_c45_modify_changed(xpcs->mdiodev, dev, reg, mask, set); } static int xpcs_read_vendor(struct dw_xpcs *xpcs, int dev, u32 reg) { return xpcs_read(xpcs, dev, DW_VENDOR | reg); } static int xpcs_write_vendor(struct dw_xpcs *xpcs, int dev, int reg, u16 val) { return xpcs_write(xpcs, dev, DW_VENDOR | reg, val); } static int xpcs_modify_vendor(struct dw_xpcs *xpcs, int dev, int reg, u16 mask, u16 set) { return xpcs_modify(xpcs, dev, DW_VENDOR | reg, mask, set); } int xpcs_read_vpcs(struct dw_xpcs *xpcs, int reg) { return xpcs_read_vendor(xpcs, MDIO_MMD_PCS, reg); } int xpcs_write_vpcs(struct dw_xpcs *xpcs, int reg, u16 val) { return xpcs_write_vendor(xpcs, MDIO_MMD_PCS, reg, val); } static int xpcs_modify_vpcs(struct dw_xpcs *xpcs, int reg, u16 mask, u16 val) { return xpcs_modify_vendor(xpcs, MDIO_MMD_PCS, reg, mask, val); } static int xpcs_poll_reset(struct dw_xpcs *xpcs, int dev) { int ret, val; ret = read_poll_timeout(xpcs_read, val, val < 0 || !(val & BMCR_RESET), 50000, 600000, true, xpcs, dev, MII_BMCR); if (val < 0) ret = val; return ret; } static int xpcs_soft_reset(struct dw_xpcs *xpcs, const struct dw_xpcs_compat *compat) { int ret, dev; switch (compat->an_mode) { case DW_AN_C73: case DW_10GBASER: dev = MDIO_MMD_PCS; break; case DW_AN_C37_SGMII: case DW_2500BASEX: case DW_AN_C37_1000BASEX: dev = MDIO_MMD_VEND2; break; default: return -EINVAL; } ret = xpcs_write(xpcs, dev, MII_BMCR, BMCR_RESET); if (ret < 0) return ret; return xpcs_poll_reset(xpcs, dev); } #define xpcs_warn(__xpcs, __state, __args...) \ ({ \ if ((__state)->link) \ dev_warn(&(__xpcs)->mdiodev->dev, ##__args); \ }) static int xpcs_read_fault_c73(struct dw_xpcs *xpcs, struct phylink_link_state *state, u16 pcs_stat1) { int ret; if (pcs_stat1 & MDIO_STAT1_FAULT) { xpcs_warn(xpcs, state, "Link fault condition detected!\n"); return -EFAULT; } ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT2); if (ret < 0) return ret; if (ret & MDIO_STAT2_RXFAULT) xpcs_warn(xpcs, state, "Receiver fault detected!\n"); if (ret & MDIO_STAT2_TXFAULT) xpcs_warn(xpcs, state, "Transmitter fault detected!\n"); ret = xpcs_read_vendor(xpcs, MDIO_MMD_PCS, DW_VR_XS_PCS_DIG_STS); if (ret < 0) return ret; if (ret & DW_RXFIFO_ERR) { xpcs_warn(xpcs, state, "FIFO fault condition detected!\n"); return -EFAULT; } ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_PCS_10GBRT_STAT1); if (ret < 0) return ret; if (!(ret & MDIO_PCS_10GBRT_STAT1_BLKLK)) xpcs_warn(xpcs, state, "Link is not locked!\n"); ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_PCS_10GBRT_STAT2); if (ret < 0) return ret; if (ret & MDIO_PCS_10GBRT_STAT2_ERR) { xpcs_warn(xpcs, state, "Link has errors!\n"); return -EFAULT; } return 0; } static void xpcs_link_up_usxgmii(struct dw_xpcs *xpcs, int speed) { int ret, speed_sel; switch (speed) { case SPEED_10: speed_sel = DW_USXGMII_10; break; case SPEED_100: speed_sel = DW_USXGMII_100; break; case SPEED_1000: speed_sel = DW_USXGMII_1000; break; case SPEED_2500: speed_sel = DW_USXGMII_2500; break; case SPEED_5000: speed_sel = DW_USXGMII_5000; break; case SPEED_10000: speed_sel = DW_USXGMII_10000; break; default: /* Nothing to do here */ return; } ret = xpcs_modify_vpcs(xpcs, MDIO_CTRL1, DW_USXGMII_EN, DW_USXGMII_EN); if (ret < 0) goto out; ret = xpcs_modify(xpcs, MDIO_MMD_VEND2, MII_BMCR, DW_USXGMII_SS_MASK, speed_sel | DW_USXGMII_FULL); if (ret < 0) goto out; ret = xpcs_modify_vpcs(xpcs, MDIO_CTRL1, DW_USXGMII_RST, DW_USXGMII_RST); if (ret < 0) goto out; return; out: dev_err(&xpcs->mdiodev->dev, "%s: XPCS access returned %pe\n", __func__, ERR_PTR(ret)); } static int _xpcs_config_aneg_c73(struct dw_xpcs *xpcs, const struct dw_xpcs_compat *compat) { int ret, adv; /* By default, in USXGMII mode XPCS operates at 10G baud and * replicates data to achieve lower speeds. Hereby, in this * default configuration we need to advertise all supported * modes and not only the ones we want to use. */ /* SR_AN_ADV3 */ adv = 0; if (xpcs_linkmode_supported(compat, 2500baseX_Full)) adv |= DW_C73_2500KX; /* TODO: 5000baseKR */ ret = xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV3, adv); if (ret < 0) return ret; /* SR_AN_ADV2 */ adv = 0; if (xpcs_linkmode_supported(compat, 1000baseKX_Full)) adv |= DW_C73_1000KX; if (xpcs_linkmode_supported(compat, 10000baseKX4_Full)) adv |= DW_C73_10000KX4; if (xpcs_linkmode_supported(compat, 10000baseKR_Full)) adv |= DW_C73_10000KR; ret = xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV2, adv); if (ret < 0) return ret; /* SR_AN_ADV1 */ adv = DW_C73_AN_ADV_SF; if (xpcs_linkmode_supported(compat, Pause)) adv |= DW_C73_PAUSE; if (xpcs_linkmode_supported(compat, Asym_Pause)) adv |= DW_C73_ASYM_PAUSE; return xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV1, adv); } static int xpcs_config_aneg_c73(struct dw_xpcs *xpcs, const struct dw_xpcs_compat *compat) { int ret; ret = _xpcs_config_aneg_c73(xpcs, compat); if (ret < 0) return ret; return xpcs_modify(xpcs, MDIO_MMD_AN, MDIO_CTRL1, MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART, MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART); } static int xpcs_aneg_done_c73(struct dw_xpcs *xpcs, struct phylink_link_state *state, const struct dw_xpcs_compat *compat, u16 an_stat1) { int ret; if (an_stat1 & MDIO_AN_STAT1_COMPLETE) { ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_AN_LPA); if (ret < 0) return ret; /* Check if Aneg outcome is valid */ if (!(ret & DW_C73_AN_ADV_SF)) { xpcs_config_aneg_c73(xpcs, compat); return 0; } return 1; } return 0; } static int xpcs_read_lpa_c73(struct dw_xpcs *xpcs, struct phylink_link_state *state, u16 an_stat1) { u16 lpa[3]; int i, ret; if (!(an_stat1 & MDIO_AN_STAT1_LPABLE)) { phylink_clear(state->lp_advertising, Autoneg); return 0; } phylink_set(state->lp_advertising, Autoneg); /* Read Clause 73 link partner advertisement */ for (i = ARRAY_SIZE(lpa); --i >= 0; ) { ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_AN_LPA + i); if (ret < 0) return ret; lpa[i] = ret; } mii_c73_mod_linkmode(state->lp_advertising, lpa); return 0; } static int xpcs_get_max_xlgmii_speed(struct dw_xpcs *xpcs, struct phylink_link_state *state) { unsigned long *adv = state->advertising; int speed = SPEED_UNKNOWN; int bit; for_each_set_bit(bit, adv, __ETHTOOL_LINK_MODE_MASK_NBITS) { int new_speed = SPEED_UNKNOWN; switch (bit) { case ETHTOOL_LINK_MODE_25000baseCR_Full_BIT: case ETHTOOL_LINK_MODE_25000baseKR_Full_BIT: case ETHTOOL_LINK_MODE_25000baseSR_Full_BIT: new_speed = SPEED_25000; break; case ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT: case ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT: case ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT: case ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT: new_speed = SPEED_40000; break; case ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT: case ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT: case ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT: case ETHTOOL_LINK_MODE_50000baseKR_Full_BIT: case ETHTOOL_LINK_MODE_50000baseSR_Full_BIT: case ETHTOOL_LINK_MODE_50000baseCR_Full_BIT: case ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT: case ETHTOOL_LINK_MODE_50000baseDR_Full_BIT: new_speed = SPEED_50000; break; case ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT: case ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT: case ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT: case ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT: case ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT: case ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT: case ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT: case ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT: case ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT: new_speed = SPEED_100000; break; default: continue; } if (new_speed > speed) speed = new_speed; } return speed; } static void xpcs_resolve_pma(struct dw_xpcs *xpcs, struct phylink_link_state *state) { state->pause = MLO_PAUSE_TX | MLO_PAUSE_RX; state->duplex = DUPLEX_FULL; switch (state->interface) { case PHY_INTERFACE_MODE_10GKR: state->speed = SPEED_10000; break; case PHY_INTERFACE_MODE_XLGMII: state->speed = xpcs_get_max_xlgmii_speed(xpcs, state); break; default: state->speed = SPEED_UNKNOWN; break; } } static int xpcs_validate(struct phylink_pcs *pcs, unsigned long *supported, const struct phylink_link_state *state) { __ETHTOOL_DECLARE_LINK_MODE_MASK(xpcs_supported) = { 0, }; const struct dw_xpcs_compat *compat; struct dw_xpcs *xpcs; int i; xpcs = phylink_pcs_to_xpcs(pcs); compat = xpcs_find_compat(xpcs, state->interface); if (!compat) return -EINVAL; /* Populate the supported link modes for this PHY interface type. * FIXME: what about the port modes and autoneg bit? This masks * all those away. */ for (i = 0; compat->supported[i] != __ETHTOOL_LINK_MODE_MASK_NBITS; i++) set_bit(compat->supported[i], xpcs_supported); linkmode_and(supported, supported, xpcs_supported); return 0; } void xpcs_get_interfaces(struct dw_xpcs *xpcs, unsigned long *interfaces) { const struct dw_xpcs_compat *compat; for (compat = xpcs->desc->compat; compat->supported; compat++) __set_bit(compat->interface, interfaces); } EXPORT_SYMBOL_GPL(xpcs_get_interfaces); int xpcs_config_eee(struct dw_xpcs *xpcs, int mult_fact_100ns, int enable) { u16 mask, val; int ret; mask = DW_VR_MII_EEE_LTX_EN | DW_VR_MII_EEE_LRX_EN | DW_VR_MII_EEE_TX_QUIET_EN | DW_VR_MII_EEE_RX_QUIET_EN | DW_VR_MII_EEE_TX_EN_CTRL | DW_VR_MII_EEE_RX_EN_CTRL | DW_VR_MII_EEE_MULT_FACT_100NS; if (enable) val = DW_VR_MII_EEE_LTX_EN | DW_VR_MII_EEE_LRX_EN | DW_VR_MII_EEE_TX_QUIET_EN | DW_VR_MII_EEE_RX_QUIET_EN | DW_VR_MII_EEE_TX_EN_CTRL | DW_VR_MII_EEE_RX_EN_CTRL | FIELD_PREP(DW_VR_MII_EEE_MULT_FACT_100NS, mult_fact_100ns); else val = 0; ret = xpcs_modify(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL0, mask, val); if (ret < 0) return ret; return xpcs_modify(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL1, DW_VR_MII_EEE_TRN_LPI, enable ? DW_VR_MII_EEE_TRN_LPI : 0); } EXPORT_SYMBOL_GPL(xpcs_config_eee); static void xpcs_pre_config(struct phylink_pcs *pcs, phy_interface_t interface) { struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs); const struct dw_xpcs_compat *compat; int ret; if (!xpcs->need_reset) return; compat = xpcs_find_compat(xpcs, interface); if (!compat) { dev_err(&xpcs->mdiodev->dev, "unsupported interface %s\n", phy_modes(interface)); return; } ret = xpcs_soft_reset(xpcs, compat); if (ret) dev_err(&xpcs->mdiodev->dev, "soft reset failed: %pe\n", ERR_PTR(ret)); xpcs->need_reset = false; } static int xpcs_config_aneg_c37_sgmii(struct dw_xpcs *xpcs, unsigned int neg_mode) { int ret, mdio_ctrl, tx_conf; u16 mask, val; /* For AN for C37 SGMII mode, the settings are :- * 1) VR_MII_MMD_CTRL Bit(12) [AN_ENABLE] = 0b (Disable SGMII AN in case it is already enabled) * 2) VR_MII_AN_CTRL Bit(2:1)[PCS_MODE] = 10b (SGMII AN) * 3) VR_MII_AN_CTRL Bit(3) [TX_CONFIG] = 0b (MAC side SGMII) * DW xPCS used with DW EQoS MAC is always MAC side SGMII. * 4) VR_MII_DIG_CTRL1 Bit(9) [MAC_AUTO_SW] = 1b (Automatic * speed/duplex mode change by HW after SGMII AN complete) * 5) VR_MII_MMD_CTRL Bit(12) [AN_ENABLE] = 1b (Enable SGMII AN) * * Note that VR_MII_MMD_CTRL is MII_BMCR. * * Note: Since it is MAC side SGMII, there is no need to set * SR_MII_AN_ADV. MAC side SGMII receives AN Tx Config from * PHY about the link state change after C28 AN is completed * between PHY and Link Partner. There is also no need to * trigger AN restart for MAC-side SGMII. */ mdio_ctrl = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_BMCR); if (mdio_ctrl < 0) return mdio_ctrl; if (mdio_ctrl & BMCR_ANENABLE) { ret = xpcs_write(xpcs, MDIO_MMD_VEND2, MII_BMCR, mdio_ctrl & ~BMCR_ANENABLE); if (ret < 0) return ret; } mask = DW_VR_MII_PCS_MODE_MASK | DW_VR_MII_TX_CONFIG_MASK; val = FIELD_PREP(DW_VR_MII_PCS_MODE_MASK, DW_VR_MII_PCS_MODE_C37_SGMII); if (xpcs->info.pma == WX_TXGBE_XPCS_PMA_10G_ID) { mask |= DW_VR_MII_AN_CTRL_8BIT; val |= DW_VR_MII_AN_CTRL_8BIT; /* Hardware requires it to be PHY side SGMII */ tx_conf = DW_VR_MII_TX_CONFIG_PHY_SIDE_SGMII; } else { tx_conf = DW_VR_MII_TX_CONFIG_MAC_SIDE_SGMII; } val |= FIELD_PREP(DW_VR_MII_TX_CONFIG_MASK, tx_conf); ret = xpcs_modify(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL, mask, val); if (ret < 0) return ret; mask = DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW; if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) val = DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW; if (xpcs->info.pma == WX_TXGBE_XPCS_PMA_10G_ID) { mask |= DW_VR_MII_DIG_CTRL1_PHY_MODE_CTRL; val |= DW_VR_MII_DIG_CTRL1_PHY_MODE_CTRL; } ret = xpcs_modify(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1, mask, val); if (ret < 0) return ret; if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) ret = xpcs_write(xpcs, MDIO_MMD_VEND2, MII_BMCR, mdio_ctrl | BMCR_ANENABLE); return ret; } static int xpcs_config_aneg_c37_1000basex(struct dw_xpcs *xpcs, unsigned int neg_mode, const unsigned long *advertising) { phy_interface_t interface = PHY_INTERFACE_MODE_1000BASEX; int ret, mdio_ctrl, adv; bool changed = 0; u16 mask, val; /* According to Chap 7.12, to set 1000BASE-X C37 AN, AN must * be disabled first:- * 1) VR_MII_MMD_CTRL Bit(12)[AN_ENABLE] = 0b * 2) VR_MII_AN_CTRL Bit(2:1)[PCS_MODE] = 00b (1000BASE-X C37) * * Note that VR_MII_MMD_CTRL is MII_BMCR. */ mdio_ctrl = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_BMCR); if (mdio_ctrl < 0) return mdio_ctrl; if (mdio_ctrl & BMCR_ANENABLE) { ret = xpcs_write(xpcs, MDIO_MMD_VEND2, MII_BMCR, mdio_ctrl & ~BMCR_ANENABLE); if (ret < 0) return ret; } mask = DW_VR_MII_PCS_MODE_MASK; val = FIELD_PREP(DW_VR_MII_PCS_MODE_MASK, DW_VR_MII_PCS_MODE_C37_1000BASEX); if (!xpcs->pcs.poll) { mask |= DW_VR_MII_AN_INTR_EN; val |= DW_VR_MII_AN_INTR_EN; } ret = xpcs_modify(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL, mask, val); if (ret < 0) return ret; /* Check for advertising changes and update the C45 MII ADV * register accordingly. */ adv = phylink_mii_c22_pcs_encode_advertisement(interface, advertising); if (adv >= 0) { ret = xpcs_modify_changed(xpcs, MDIO_MMD_VEND2, MII_ADVERTISE, 0xffff, adv); if (ret < 0) return ret; changed = ret; } /* Clear CL37 AN complete status */ ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_INTR_STS, 0); if (ret < 0) return ret; if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) { ret = xpcs_write(xpcs, MDIO_MMD_VEND2, MII_BMCR, mdio_ctrl | BMCR_ANENABLE); if (ret < 0) return ret; } return changed; } static int xpcs_config_2500basex(struct dw_xpcs *xpcs) { int ret; ret = xpcs_modify(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1, DW_VR_MII_DIG_CTRL1_2G5_EN | DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW, DW_VR_MII_DIG_CTRL1_2G5_EN); if (ret < 0) return ret; return xpcs_modify(xpcs, MDIO_MMD_VEND2, MII_BMCR, BMCR_ANENABLE | BMCR_SPEED1000 | BMCR_SPEED100, BMCR_SPEED1000); } static int xpcs_do_config(struct dw_xpcs *xpcs, phy_interface_t interface, const unsigned long *advertising, unsigned int neg_mode) { const struct dw_xpcs_compat *compat; int ret; compat = xpcs_find_compat(xpcs, interface); if (!compat) return -ENODEV; if (xpcs->info.pma == WX_TXGBE_XPCS_PMA_10G_ID) { ret = txgbe_xpcs_switch_mode(xpcs, interface); if (ret) return ret; /* Wangxun devices need backplane CL37 AN enabled for * SGMII and 1000base-X */ if (interface == PHY_INTERFACE_MODE_SGMII || interface == PHY_INTERFACE_MODE_1000BASEX) xpcs_write_vpcs(xpcs, DW_VR_XS_PCS_DIG_CTRL1, DW_CL37_BP | DW_EN_VSMMD1); } switch (compat->an_mode) { case DW_10GBASER: break; case DW_AN_C73: if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) { ret = xpcs_config_aneg_c73(xpcs, compat); if (ret) return ret; } break; case DW_AN_C37_SGMII: ret = xpcs_config_aneg_c37_sgmii(xpcs, neg_mode); if (ret) return ret; break; case DW_AN_C37_1000BASEX: ret = xpcs_config_aneg_c37_1000basex(xpcs, neg_mode, advertising); if (ret) return ret; break; case DW_2500BASEX: ret = xpcs_config_2500basex(xpcs); if (ret) return ret; break; default: return -EINVAL; } if (compat->pma_config) { ret = compat->pma_config(xpcs); if (ret) return ret; } return 0; } static int xpcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, phy_interface_t interface, const unsigned long *advertising, bool permit_pause_to_mac) { struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs); return xpcs_do_config(xpcs, interface, advertising, neg_mode); } static int xpcs_get_state_c73(struct dw_xpcs *xpcs, struct phylink_link_state *state, const struct dw_xpcs_compat *compat) { bool an_enabled; int pcs_stat1; int an_stat1; int ret; /* The link status bit is latching-low, so it is important to * avoid unnecessary re-reads of this register to avoid missing * a link-down event. */ pcs_stat1 = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT1); if (pcs_stat1 < 0) { state->link = false; return pcs_stat1; } /* Link needs to be read first ... */ state->link = !!(pcs_stat1 & MDIO_STAT1_LSTATUS); /* ... and then we check the faults. */ ret = xpcs_read_fault_c73(xpcs, state, pcs_stat1); if (ret) { ret = xpcs_soft_reset(xpcs, compat); if (ret) return ret; state->link = 0; return xpcs_do_config(xpcs, state->interface, NULL, PHYLINK_PCS_NEG_INBAND_ENABLED); } /* There is no point doing anything else if the link is down. */ if (!state->link) return 0; an_enabled = linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, state->advertising); if (an_enabled) { /* The link status bit is latching-low, so it is important to * avoid unnecessary re-reads of this register to avoid missing * a link-down event. */ an_stat1 = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_STAT1); if (an_stat1 < 0) { state->link = false; return an_stat1; } state->an_complete = xpcs_aneg_done_c73(xpcs, state, compat, an_stat1); if (!state->an_complete) { state->link = false; return 0; } ret = xpcs_read_lpa_c73(xpcs, state, an_stat1); if (ret < 0) { state->link = false; return ret; } phylink_resolve_c73(state); } else { xpcs_resolve_pma(xpcs, state); } return 0; } static int xpcs_get_state_c37_sgmii(struct dw_xpcs *xpcs, struct phylink_link_state *state) { int ret; /* Reset link_state */ state->link = false; state->speed = SPEED_UNKNOWN; state->duplex = DUPLEX_UNKNOWN; state->pause = 0; /* For C37 SGMII mode, we check DW_VR_MII_AN_INTR_STS for link * status, speed and duplex. */ ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_INTR_STS); if (ret < 0) return ret; if (ret & DW_VR_MII_C37_ANSGM_SP_LNKSTS) { int speed_value; state->link = true; speed_value = FIELD_GET(DW_VR_MII_AN_STS_C37_ANSGM_SP, ret); if (speed_value == DW_VR_MII_C37_ANSGM_SP_1000) state->speed = SPEED_1000; else if (speed_value == DW_VR_MII_C37_ANSGM_SP_100) state->speed = SPEED_100; else state->speed = SPEED_10; if (ret & DW_VR_MII_AN_STS_C37_ANSGM_FD) state->duplex = DUPLEX_FULL; else state->duplex = DUPLEX_HALF; } else if (ret == DW_VR_MII_AN_STS_C37_ANCMPLT_INTR) { int speed, duplex; state->link = true; speed = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_BMCR); if (speed < 0) return speed; speed &= BMCR_SPEED100 | BMCR_SPEED1000; if (speed == BMCR_SPEED1000) state->speed = SPEED_1000; else if (speed == BMCR_SPEED100) state->speed = SPEED_100; else if (speed == 0) state->speed = SPEED_10; duplex = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_ADVERTISE); if (duplex < 0) return duplex; if (duplex & ADVERTISE_1000XFULL) state->duplex = DUPLEX_FULL; else if (duplex & ADVERTISE_1000XHALF) state->duplex = DUPLEX_HALF; xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_INTR_STS, 0); } return 0; } static int xpcs_get_state_c37_1000basex(struct dw_xpcs *xpcs, struct phylink_link_state *state) { int lpa, bmsr; if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, state->advertising)) { /* Reset link state */ state->link = false; lpa = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_LPA); if (lpa < 0 || lpa & LPA_RFAULT) return lpa; bmsr = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_BMSR); if (bmsr < 0) return bmsr; /* Clear AN complete interrupt */ if (!xpcs->pcs.poll) { int an_intr; an_intr = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_INTR_STS); if (an_intr & DW_VR_MII_AN_STS_C37_ANCMPLT_INTR) { an_intr &= ~DW_VR_MII_AN_STS_C37_ANCMPLT_INTR; xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_INTR_STS, an_intr); } } phylink_mii_c22_pcs_decode_state(state, bmsr, lpa); } return 0; } static int xpcs_get_state_2500basex(struct dw_xpcs *xpcs, struct phylink_link_state *state) { int ret; ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_BMSR); if (ret < 0) { state->link = 0; return ret; } state->link = !!(ret & BMSR_LSTATUS); if (!state->link) return 0; state->speed = SPEED_2500; state->pause |= MLO_PAUSE_TX | MLO_PAUSE_RX; state->duplex = DUPLEX_FULL; return 0; } static void xpcs_get_state(struct phylink_pcs *pcs, struct phylink_link_state *state) { struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs); const struct dw_xpcs_compat *compat; int ret; compat = xpcs_find_compat(xpcs, state->interface); if (!compat) return; switch (compat->an_mode) { case DW_10GBASER: phylink_mii_c45_pcs_get_state(xpcs->mdiodev, state); break; case DW_AN_C73: ret = xpcs_get_state_c73(xpcs, state, compat); if (ret) dev_err(&xpcs->mdiodev->dev, "%s returned %pe\n", "xpcs_get_state_c73", ERR_PTR(ret)); break; case DW_AN_C37_SGMII: ret = xpcs_get_state_c37_sgmii(xpcs, state); if (ret) dev_err(&xpcs->mdiodev->dev, "%s returned %pe\n", "xpcs_get_state_c37_sgmii", ERR_PTR(ret)); break; case DW_AN_C37_1000BASEX: ret = xpcs_get_state_c37_1000basex(xpcs, state); if (ret) dev_err(&xpcs->mdiodev->dev, "%s returned %pe\n", "xpcs_get_state_c37_1000basex", ERR_PTR(ret)); break; case DW_2500BASEX: ret = xpcs_get_state_2500basex(xpcs, state); if (ret) dev_err(&xpcs->mdiodev->dev, "%s returned %pe\n", "xpcs_get_state_2500basex", ERR_PTR(ret)); break; default: return; } } static void xpcs_link_up_sgmii_1000basex(struct dw_xpcs *xpcs, unsigned int neg_mode, phy_interface_t interface, int speed, int duplex) { int ret; if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) return; if (interface == PHY_INTERFACE_MODE_1000BASEX) { if (speed != SPEED_1000) { dev_err(&xpcs->mdiodev->dev, "%s: speed %dMbps not supported\n", __func__, speed); return; } if (duplex != DUPLEX_FULL) dev_err(&xpcs->mdiodev->dev, "%s: half duplex not supported\n", __func__); } ret = xpcs_write(xpcs, MDIO_MMD_VEND2, MII_BMCR, mii_bmcr_encode_fixed(speed, duplex)); if (ret) dev_err(&xpcs->mdiodev->dev, "%s: xpcs_write returned %pe\n", __func__, ERR_PTR(ret)); } static void xpcs_link_up(struct phylink_pcs *pcs, unsigned int neg_mode, phy_interface_t interface, int speed, int duplex) { struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs); switch (interface) { case PHY_INTERFACE_MODE_USXGMII: xpcs_link_up_usxgmii(xpcs, speed); break; case PHY_INTERFACE_MODE_SGMII: case PHY_INTERFACE_MODE_1000BASEX: xpcs_link_up_sgmii_1000basex(xpcs, neg_mode, interface, speed, duplex); break; default: break; } } static void xpcs_an_restart(struct phylink_pcs *pcs) { struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs); xpcs_modify(xpcs, MDIO_MMD_VEND2, MII_BMCR, BMCR_ANRESTART, BMCR_ANRESTART); } static int xpcs_read_ids(struct dw_xpcs *xpcs) { int ret; u32 id; /* First, search C73 PCS using PCS MMD 3. Return ENODEV if communication * failed indicating that device couldn't be reached. */ ret = xpcs_read(xpcs, MDIO_MMD_PCS, MII_PHYSID1); if (ret < 0) return -ENODEV; id = ret << 16; ret = xpcs_read(xpcs, MDIO_MMD_PCS, MII_PHYSID2); if (ret < 0) return ret; id |= ret; /* If Device IDs are not all zeros or ones, then 10GBase-X/R or C73 * KR/KX4 PCS found. Otherwise fallback to detecting 1000Base-X or C37 * PCS in MII MMD 31. */ if (!id || id == 0xffffffff) { ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_PHYSID1); if (ret < 0) return ret; id = ret << 16; ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_PHYSID2); if (ret < 0) return ret; id |= ret; } /* Set the PCS ID if it hasn't been pre-initialized */ if (xpcs->info.pcs == DW_XPCS_ID_NATIVE) xpcs->info.pcs = id; /* Find out PMA/PMD ID from MMD 1 device ID registers */ ret = xpcs_read(xpcs, MDIO_MMD_PMAPMD, MDIO_DEVID1); if (ret < 0) return ret; id = ret; ret = xpcs_read(xpcs, MDIO_MMD_PMAPMD, MDIO_DEVID2); if (ret < 0) return ret; /* Note the inverted dword order and masked out Model/Revision numbers * with respect to what is done with the PCS ID... */ ret = (ret >> 10) & 0x3F; id |= ret << 16; /* Set the PMA ID if it hasn't been pre-initialized */ if (xpcs->info.pma == DW_XPCS_PMA_ID_NATIVE) xpcs->info.pma = id; return 0; } static const struct dw_xpcs_compat synopsys_xpcs_compat[] = { { .interface = PHY_INTERFACE_MODE_USXGMII, .supported = xpcs_usxgmii_features, .an_mode = DW_AN_C73, }, { .interface = PHY_INTERFACE_MODE_10GKR, .supported = xpcs_10gkr_features, .an_mode = DW_AN_C73, }, { .interface = PHY_INTERFACE_MODE_XLGMII, .supported = xpcs_xlgmii_features, .an_mode = DW_AN_C73, }, { .interface = PHY_INTERFACE_MODE_10GBASER, .supported = xpcs_10gbaser_features, .an_mode = DW_10GBASER, }, { .interface = PHY_INTERFACE_MODE_SGMII, .supported = xpcs_sgmii_features, .an_mode = DW_AN_C37_SGMII, }, { .interface = PHY_INTERFACE_MODE_1000BASEX, .supported = xpcs_1000basex_features, .an_mode = DW_AN_C37_1000BASEX, }, { .interface = PHY_INTERFACE_MODE_2500BASEX, .supported = xpcs_2500basex_features, .an_mode = DW_2500BASEX, }, { } }; static const struct dw_xpcs_compat nxp_sja1105_xpcs_compat[] = { { .interface = PHY_INTERFACE_MODE_SGMII, .supported = xpcs_sgmii_features, .an_mode = DW_AN_C37_SGMII, .pma_config = nxp_sja1105_sgmii_pma_config, }, { } }; static const struct dw_xpcs_compat nxp_sja1110_xpcs_compat[] = { { .interface = PHY_INTERFACE_MODE_SGMII, .supported = xpcs_sgmii_features, .an_mode = DW_AN_C37_SGMII, .pma_config = nxp_sja1110_sgmii_pma_config, }, { .interface = PHY_INTERFACE_MODE_2500BASEX, .supported = xpcs_2500basex_features, .an_mode = DW_2500BASEX, .pma_config = nxp_sja1110_2500basex_pma_config, }, { } }; static const struct dw_xpcs_desc xpcs_desc_list[] = { { .id = DW_XPCS_ID, .mask = DW_XPCS_ID_MASK, .compat = synopsys_xpcs_compat, }, { .id = NXP_SJA1105_XPCS_ID, .mask = DW_XPCS_ID_MASK, .compat = nxp_sja1105_xpcs_compat, }, { .id = NXP_SJA1110_XPCS_ID, .mask = DW_XPCS_ID_MASK, .compat = nxp_sja1110_xpcs_compat, }, }; static const struct phylink_pcs_ops xpcs_phylink_ops = { .pcs_validate = xpcs_validate, .pcs_pre_config = xpcs_pre_config, .pcs_config = xpcs_config, .pcs_get_state = xpcs_get_state, .pcs_an_restart = xpcs_an_restart, .pcs_link_up = xpcs_link_up, }; static int xpcs_identify(struct dw_xpcs *xpcs) { int i, ret; ret = xpcs_read_ids(xpcs); if (ret < 0) return ret; for (i = 0; i < ARRAY_SIZE(xpcs_desc_list); i++) { const struct dw_xpcs_desc *entry = &xpcs_desc_list[i]; if ((xpcs->info.pcs & entry->mask) == entry->id) { xpcs->desc = entry; return 0; } } return -ENODEV; } static struct dw_xpcs *xpcs_create_data(struct mdio_device *mdiodev) { struct dw_xpcs *xpcs; xpcs = kzalloc(sizeof(*xpcs), GFP_KERNEL); if (!xpcs) return ERR_PTR(-ENOMEM); mdio_device_get(mdiodev); xpcs->mdiodev = mdiodev; xpcs->pcs.ops = &xpcs_phylink_ops; xpcs->pcs.neg_mode = true; xpcs->pcs.poll = true; return xpcs; } static void xpcs_free_data(struct dw_xpcs *xpcs) { mdio_device_put(xpcs->mdiodev); kfree(xpcs); } static int xpcs_init_clks(struct dw_xpcs *xpcs) { static const char *ids[DW_XPCS_NUM_CLKS] = { [DW_XPCS_CORE_CLK] = "core", [DW_XPCS_PAD_CLK] = "pad", }; struct device *dev = &xpcs->mdiodev->dev; int ret, i; for (i = 0; i < DW_XPCS_NUM_CLKS; ++i) xpcs->clks[i].id = ids[i]; ret = clk_bulk_get_optional(dev, DW_XPCS_NUM_CLKS, xpcs->clks); if (ret) return dev_err_probe(dev, ret, "Failed to get clocks\n"); ret = clk_bulk_prepare_enable(DW_XPCS_NUM_CLKS, xpcs->clks); if (ret) return dev_err_probe(dev, ret, "Failed to enable clocks\n"); return 0; } static void xpcs_clear_clks(struct dw_xpcs *xpcs) { clk_bulk_disable_unprepare(DW_XPCS_NUM_CLKS, xpcs->clks); clk_bulk_put(DW_XPCS_NUM_CLKS, xpcs->clks); } static int xpcs_init_id(struct dw_xpcs *xpcs) { const struct dw_xpcs_info *info; info = dev_get_platdata(&xpcs->mdiodev->dev); if (!info) { xpcs->info.pcs = DW_XPCS_ID_NATIVE; xpcs->info.pma = DW_XPCS_PMA_ID_NATIVE; } else { xpcs->info = *info; } return xpcs_identify(xpcs); } static struct dw_xpcs *xpcs_create(struct mdio_device *mdiodev) { struct dw_xpcs *xpcs; int ret; xpcs = xpcs_create_data(mdiodev); if (IS_ERR(xpcs)) return xpcs; ret = xpcs_init_clks(xpcs); if (ret) goto out_free_data; ret = xpcs_init_id(xpcs); if (ret) goto out_clear_clks; if (xpcs->info.pma == WX_TXGBE_XPCS_PMA_10G_ID) xpcs->pcs.poll = false; else xpcs->need_reset = true; return xpcs; out_clear_clks: xpcs_clear_clks(xpcs); out_free_data: xpcs_free_data(xpcs); return ERR_PTR(ret); } /** * xpcs_create_mdiodev() - create a DW xPCS instance with the MDIO @addr * @bus: pointer to the MDIO-bus descriptor for the device to be looked at * @addr: device MDIO-bus ID * * Return: a pointer to the DW XPCS handle if successful, otherwise -ENODEV if * the PCS device couldn't be found on the bus and other negative errno related * to the data allocation and MDIO-bus communications. */ struct dw_xpcs *xpcs_create_mdiodev(struct mii_bus *bus, int addr) { struct mdio_device *mdiodev; struct dw_xpcs *xpcs; mdiodev = mdio_device_create(bus, addr); if (IS_ERR(mdiodev)) return ERR_CAST(mdiodev); xpcs = xpcs_create(mdiodev); /* xpcs_create() has taken a refcount on the mdiodev if it was * successful. If xpcs_create() fails, this will free the mdio * device here. In any case, we don't need to hold our reference * anymore, and putting it here will allow mdio_device_put() in * xpcs_destroy() to automatically free the mdio device. */ mdio_device_put(mdiodev); return xpcs; } EXPORT_SYMBOL_GPL(xpcs_create_mdiodev); struct phylink_pcs *xpcs_create_pcs_mdiodev(struct mii_bus *bus, int addr) { struct dw_xpcs *xpcs; xpcs = xpcs_create_mdiodev(bus, addr); if (IS_ERR(xpcs)) return ERR_CAST(xpcs); return &xpcs->pcs; } EXPORT_SYMBOL_GPL(xpcs_create_pcs_mdiodev); /** * xpcs_create_fwnode() - Create a DW xPCS instance from @fwnode * @fwnode: fwnode handle poining to the DW XPCS device * * Return: a pointer to the DW XPCS handle if successful, otherwise -ENODEV if * the fwnode device is unavailable or the PCS device couldn't be found on the * bus, -EPROBE_DEFER if the respective MDIO-device instance couldn't be found, * other negative errno related to the data allocations and MDIO-bus * communications. */ struct dw_xpcs *xpcs_create_fwnode(struct fwnode_handle *fwnode) { struct mdio_device *mdiodev; struct dw_xpcs *xpcs; if (!fwnode_device_is_available(fwnode)) return ERR_PTR(-ENODEV); mdiodev = fwnode_mdio_find_device(fwnode); if (!mdiodev) return ERR_PTR(-EPROBE_DEFER); xpcs = xpcs_create(mdiodev); /* xpcs_create() has taken a refcount on the mdiodev if it was * successful. If xpcs_create() fails, this will free the mdio * device here. In any case, we don't need to hold our reference * anymore, and putting it here will allow mdio_device_put() in * xpcs_destroy() to automatically free the mdio device. */ mdio_device_put(mdiodev); return xpcs; } EXPORT_SYMBOL_GPL(xpcs_create_fwnode); void xpcs_destroy(struct dw_xpcs *xpcs) { if (!xpcs) return; xpcs_clear_clks(xpcs); xpcs_free_data(xpcs); } EXPORT_SYMBOL_GPL(xpcs_destroy); void xpcs_destroy_pcs(struct phylink_pcs *pcs) { xpcs_destroy(phylink_pcs_to_xpcs(pcs)); } EXPORT_SYMBOL_GPL(xpcs_destroy_pcs); MODULE_DESCRIPTION("Synopsys DesignWare XPCS library"); MODULE_LICENSE("GPL v2");