/* * Broadcom BCM7xxx internal transceivers support. * * Copyright (C) 2014, Broadcom Corporation * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include #include #include #include "bcm-phy-lib.h" #include #include #include /* Broadcom BCM7xxx internal PHY registers */ /* 40nm only register definitions */ #define MII_BCM7XXX_100TX_AUX_CTL 0x10 #define MII_BCM7XXX_100TX_FALSE_CAR 0x13 #define MII_BCM7XXX_100TX_DISC 0x14 #define MII_BCM7XXX_AUX_MODE 0x1d #define MII_BCM7XXX_64CLK_MDIO BIT(12) #define MII_BCM7XXX_TEST 0x1f #define MII_BCM7XXX_SHD_MODE_2 BIT(2) /* 28nm only register definitions */ #define MISC_ADDR(base, channel) base, channel #define DSP_TAP10 MISC_ADDR(0x0a, 0) #define PLL_PLLCTRL_1 MISC_ADDR(0x32, 1) #define PLL_PLLCTRL_2 MISC_ADDR(0x32, 2) #define PLL_PLLCTRL_4 MISC_ADDR(0x33, 0) #define AFE_RXCONFIG_0 MISC_ADDR(0x38, 0) #define AFE_RXCONFIG_1 MISC_ADDR(0x38, 1) #define AFE_RXCONFIG_2 MISC_ADDR(0x38, 2) #define AFE_RX_LP_COUNTER MISC_ADDR(0x38, 3) #define AFE_TX_CONFIG MISC_ADDR(0x39, 0) #define AFE_VDCA_ICTRL_0 MISC_ADDR(0x39, 1) #define AFE_VDAC_OTHERS_0 MISC_ADDR(0x39, 3) #define AFE_HPF_TRIM_OTHERS MISC_ADDR(0x3a, 0) struct bcm7xxx_phy_priv { u64 *stats; }; static void r_rc_cal_reset(struct phy_device *phydev) { /* Reset R_CAL/RC_CAL Engine */ bcm_phy_write_exp(phydev, 0x00b0, 0x0010); /* Disable Reset R_AL/RC_CAL Engine */ bcm_phy_write_exp(phydev, 0x00b0, 0x0000); } static int bcm7xxx_28nm_b0_afe_config_init(struct phy_device *phydev) { /* Increase VCO range to prevent unlocking problem of PLL at low * temp */ bcm_phy_write_misc(phydev, PLL_PLLCTRL_1, 0x0048); /* Change Ki to 011 */ bcm_phy_write_misc(phydev, PLL_PLLCTRL_2, 0x021b); /* Disable loading of TVCO buffer to bandgap, set bandgap trim * to 111 */ bcm_phy_write_misc(phydev, PLL_PLLCTRL_4, 0x0e20); /* Adjust bias current trim by -3 */ bcm_phy_write_misc(phydev, DSP_TAP10, 0x690b); /* Switch to CORE_BASE1E */ phy_write(phydev, MII_BRCM_CORE_BASE1E, 0xd); r_rc_cal_reset(phydev); /* write AFE_RXCONFIG_0 */ bcm_phy_write_misc(phydev, AFE_RXCONFIG_0, 0xeb19); /* write AFE_RXCONFIG_1 */ bcm_phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9a3f); /* write AFE_RX_LP_COUNTER */ bcm_phy_write_misc(phydev, AFE_RX_LP_COUNTER, 0x7fc0); /* write AFE_HPF_TRIM_OTHERS */ bcm_phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x000b); /* write AFTE_TX_CONFIG */ bcm_phy_write_misc(phydev, AFE_TX_CONFIG, 0x0800); return 0; } static int bcm7xxx_28nm_d0_afe_config_init(struct phy_device *phydev) { /* AFE_RXCONFIG_0 */ bcm_phy_write_misc(phydev, AFE_RXCONFIG_0, 0xeb15); /* AFE_RXCONFIG_1 */ bcm_phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9b2f); /* AFE_RXCONFIG_2, set rCal offset for HT=0 code and LT=-2 code */ bcm_phy_write_misc(phydev, AFE_RXCONFIG_2, 0x2003); /* AFE_RX_LP_COUNTER, set RX bandwidth to maximum */ bcm_phy_write_misc(phydev, AFE_RX_LP_COUNTER, 0x7fc0); /* AFE_TX_CONFIG, set 100BT Cfeed=011 to improve rise/fall time */ bcm_phy_write_misc(phydev, AFE_TX_CONFIG, 0x431); /* AFE_VDCA_ICTRL_0, set Iq=1101 instead of 0111 for AB symmetry */ bcm_phy_write_misc(phydev, AFE_VDCA_ICTRL_0, 0xa7da); /* AFE_VDAC_OTHERS_0, set 1000BT Cidac=010 for all ports */ bcm_phy_write_misc(phydev, AFE_VDAC_OTHERS_0, 0xa020); /* AFE_HPF_TRIM_OTHERS, set 100Tx/10BT to -4.5% swing and set rCal * offset for HT=0 code */ bcm_phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x00e3); /* CORE_BASE1E, force trim to overwrite and set I_ext trim to 0000 */ phy_write(phydev, MII_BRCM_CORE_BASE1E, 0x0010); /* DSP_TAP10, adjust bias current trim (+0% swing, +0 tick) */ bcm_phy_write_misc(phydev, DSP_TAP10, 0x011b); /* Reset R_CAL/RC_CAL engine */ r_rc_cal_reset(phydev); return 0; } static int bcm7xxx_28nm_e0_plus_afe_config_init(struct phy_device *phydev) { /* AFE_RXCONFIG_1, provide more margin for INL/DNL measurement */ bcm_phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9b2f); /* AFE_TX_CONFIG, set 100BT Cfeed=011 to improve rise/fall time */ bcm_phy_write_misc(phydev, AFE_TX_CONFIG, 0x431); /* AFE_VDCA_ICTRL_0, set Iq=1101 instead of 0111 for AB symmetry */ bcm_phy_write_misc(phydev, AFE_VDCA_ICTRL_0, 0xa7da); /* AFE_HPF_TRIM_OTHERS, set 100Tx/10BT to -4.5% swing and set rCal * offset for HT=0 code */ bcm_phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x00e3); /* CORE_BASE1E, force trim to overwrite and set I_ext trim to 0000 */ phy_write(phydev, MII_BRCM_CORE_BASE1E, 0x0010); /* DSP_TAP10, adjust bias current trim (+0% swing, +0 tick) */ bcm_phy_write_misc(phydev, DSP_TAP10, 0x011b); /* Reset R_CAL/RC_CAL engine */ r_rc_cal_reset(phydev); return 0; } static int bcm7xxx_28nm_config_init(struct phy_device *phydev) { u8 rev = PHY_BRCM_7XXX_REV(phydev->dev_flags); u8 patch = PHY_BRCM_7XXX_PATCH(phydev->dev_flags); u8 count; int ret = 0; pr_info_once("%s: %s PHY revision: 0x%02x, patch: %d\n", phydev_name(phydev), phydev->drv->name, rev, patch); /* Dummy read to a register to workaround an issue upon reset where the * internal inverter may not allow the first MDIO transaction to pass * the MDIO management controller and make us return 0xffff for such * reads. */ phy_read(phydev, MII_BMSR); switch (rev) { case 0xb0: ret = bcm7xxx_28nm_b0_afe_config_init(phydev); break; case 0xd0: ret = bcm7xxx_28nm_d0_afe_config_init(phydev); break; case 0xe0: case 0xf0: /* Rev G0 introduces a roll over */ case 0x10: ret = bcm7xxx_28nm_e0_plus_afe_config_init(phydev); break; default: break; } if (ret) return ret; ret = bcm_phy_downshift_get(phydev, &count); if (ret) return ret; /* Only enable EEE if Wirespeed/downshift is disabled */ ret = bcm_phy_set_eee(phydev, count == DOWNSHIFT_DEV_DISABLE); if (ret) return ret; return bcm_phy_enable_apd(phydev, true); } static int bcm7xxx_28nm_resume(struct phy_device *phydev) { int ret; /* Re-apply workarounds coming out suspend/resume */ ret = bcm7xxx_28nm_config_init(phydev); if (ret) return ret; /* 28nm Gigabit PHYs come out of reset without any half-duplex * or "hub" compliant advertised mode, fix that. This does not * cause any problems with the PHY library since genphy_config_aneg() * gracefully handles auto-negotiated and forced modes. */ return genphy_config_aneg(phydev); } static int phy_set_clr_bits(struct phy_device *dev, int location, int set_mask, int clr_mask) { int v, ret; v = phy_read(dev, location); if (v < 0) return v; v &= ~clr_mask; v |= set_mask; ret = phy_write(dev, location, v); if (ret < 0) return ret; return v; } static int bcm7xxx_config_init(struct phy_device *phydev) { int ret; /* Enable 64 clock MDIO */ phy_write(phydev, MII_BCM7XXX_AUX_MODE, MII_BCM7XXX_64CLK_MDIO); phy_read(phydev, MII_BCM7XXX_AUX_MODE); /* set shadow mode 2 */ ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, MII_BCM7XXX_SHD_MODE_2, MII_BCM7XXX_SHD_MODE_2); if (ret < 0) return ret; /* set iddq_clkbias */ phy_write(phydev, MII_BCM7XXX_100TX_DISC, 0x0F00); udelay(10); /* reset iddq_clkbias */ phy_write(phydev, MII_BCM7XXX_100TX_DISC, 0x0C00); phy_write(phydev, MII_BCM7XXX_100TX_FALSE_CAR, 0x7555); /* reset shadow mode 2 */ ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 0, MII_BCM7XXX_SHD_MODE_2); if (ret < 0) return ret; return 0; } /* Workaround for putting the PHY in IDDQ mode, required * for all BCM7XXX 40nm and 65nm PHYs */ static int bcm7xxx_suspend(struct phy_device *phydev) { int ret; const struct bcm7xxx_regs { int reg; u16 value; } bcm7xxx_suspend_cfg[] = { { MII_BCM7XXX_TEST, 0x008b }, { MII_BCM7XXX_100TX_AUX_CTL, 0x01c0 }, { MII_BCM7XXX_100TX_DISC, 0x7000 }, { MII_BCM7XXX_TEST, 0x000f }, { MII_BCM7XXX_100TX_AUX_CTL, 0x20d0 }, { MII_BCM7XXX_TEST, 0x000b }, }; unsigned int i; for (i = 0; i < ARRAY_SIZE(bcm7xxx_suspend_cfg); i++) { ret = phy_write(phydev, bcm7xxx_suspend_cfg[i].reg, bcm7xxx_suspend_cfg[i].value); if (ret) return ret; } return 0; } static int bcm7xxx_28nm_get_tunable(struct phy_device *phydev, struct ethtool_tunable *tuna, void *data) { switch (tuna->id) { case ETHTOOL_PHY_DOWNSHIFT: return bcm_phy_downshift_get(phydev, (u8 *)data); default: return -EOPNOTSUPP; } } static int bcm7xxx_28nm_set_tunable(struct phy_device *phydev, struct ethtool_tunable *tuna, const void *data) { u8 count = *(u8 *)data; int ret; switch (tuna->id) { case ETHTOOL_PHY_DOWNSHIFT: ret = bcm_phy_downshift_set(phydev, count); break; default: return -EOPNOTSUPP; } if (ret) return ret; /* Disable EEE advertisment since this prevents the PHY * from successfully linking up, trigger auto-negotiation restart * to let the MAC decide what to do. */ ret = bcm_phy_set_eee(phydev, count == DOWNSHIFT_DEV_DISABLE); if (ret) return ret; return genphy_restart_aneg(phydev); } static void bcm7xxx_28nm_get_phy_stats(struct phy_device *phydev, struct ethtool_stats *stats, u64 *data) { struct bcm7xxx_phy_priv *priv = phydev->priv; bcm_phy_get_stats(phydev, priv->stats, stats, data); } static int bcm7xxx_28nm_probe(struct phy_device *phydev) { struct bcm7xxx_phy_priv *priv; priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; phydev->priv = priv; priv->stats = devm_kcalloc(&phydev->mdio.dev, bcm_phy_get_sset_count(phydev), sizeof(u64), GFP_KERNEL); if (!priv->stats) return -ENOMEM; return 0; } #define BCM7XXX_28NM_GPHY(_oui, _name) \ { \ .phy_id = (_oui), \ .phy_id_mask = 0xfffffff0, \ .name = _name, \ .features = PHY_GBIT_FEATURES | \ SUPPORTED_Pause | SUPPORTED_Asym_Pause, \ .flags = PHY_IS_INTERNAL, \ .config_init = bcm7xxx_28nm_config_init, \ .config_aneg = genphy_config_aneg, \ .read_status = genphy_read_status, \ .resume = bcm7xxx_28nm_resume, \ .get_tunable = bcm7xxx_28nm_get_tunable, \ .set_tunable = bcm7xxx_28nm_set_tunable, \ .get_sset_count = bcm_phy_get_sset_count, \ .get_strings = bcm_phy_get_strings, \ .get_stats = bcm7xxx_28nm_get_phy_stats, \ .probe = bcm7xxx_28nm_probe, \ } #define BCM7XXX_40NM_EPHY(_oui, _name) \ { \ .phy_id = (_oui), \ .phy_id_mask = 0xfffffff0, \ .name = _name, \ .features = PHY_BASIC_FEATURES | \ SUPPORTED_Pause | SUPPORTED_Asym_Pause, \ .flags = PHY_IS_INTERNAL, \ .config_init = bcm7xxx_config_init, \ .config_aneg = genphy_config_aneg, \ .read_status = genphy_read_status, \ .suspend = bcm7xxx_suspend, \ .resume = bcm7xxx_config_init, \ } static struct phy_driver bcm7xxx_driver[] = { BCM7XXX_28NM_GPHY(PHY_ID_BCM7250, "Broadcom BCM7250"), BCM7XXX_28NM_GPHY(PHY_ID_BCM7364, "Broadcom BCM7364"), BCM7XXX_28NM_GPHY(PHY_ID_BCM7366, "Broadcom BCM7366"), BCM7XXX_28NM_GPHY(PHY_ID_BCM7439, "Broadcom BCM7439"), BCM7XXX_28NM_GPHY(PHY_ID_BCM7439_2, "Broadcom BCM7439 (2)"), BCM7XXX_28NM_GPHY(PHY_ID_BCM7445, "Broadcom BCM7445"), BCM7XXX_40NM_EPHY(PHY_ID_BCM7346, "Broadcom BCM7346"), BCM7XXX_40NM_EPHY(PHY_ID_BCM7362, "Broadcom BCM7362"), BCM7XXX_40NM_EPHY(PHY_ID_BCM7425, "Broadcom BCM7425"), BCM7XXX_40NM_EPHY(PHY_ID_BCM7429, "Broadcom BCM7429"), BCM7XXX_40NM_EPHY(PHY_ID_BCM7435, "Broadcom BCM7435"), }; static struct mdio_device_id __maybe_unused bcm7xxx_tbl[] = { { PHY_ID_BCM7250, 0xfffffff0, }, { PHY_ID_BCM7364, 0xfffffff0, }, { PHY_ID_BCM7366, 0xfffffff0, }, { PHY_ID_BCM7346, 0xfffffff0, }, { PHY_ID_BCM7362, 0xfffffff0, }, { PHY_ID_BCM7425, 0xfffffff0, }, { PHY_ID_BCM7429, 0xfffffff0, }, { PHY_ID_BCM7439, 0xfffffff0, }, { PHY_ID_BCM7435, 0xfffffff0, }, { PHY_ID_BCM7445, 0xfffffff0, }, { } }; module_phy_driver(bcm7xxx_driver); MODULE_DEVICE_TABLE(mdio, bcm7xxx_tbl); MODULE_DESCRIPTION("Broadcom BCM7xxx internal PHY driver"); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Broadcom Corporation");