/* * 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 #include #include /* Broadcom BCM7xxx internal PHY registers */ #define MII_BCM7XXX_CHANNEL_WIDTH 0x2000 /* 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_BCM7XX_64CLK_MDIO BIT(12) #define MII_BCM7XXX_CORE_BASE1E 0x1e #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_RX_LP_COUNTER MISC_ADDR(0x38, 3) #define AFE_TX_CONFIG MISC_ADDR(0x39, 0) #define AFE_HPF_TRIM_OTHERS MISC_ADDR(0x3a, 0) #define CORE_EXPB0 0xb0 static int bcm7445_config_init(struct phy_device *phydev) { int ret; const struct bcm7445_regs { int reg; u16 value; } bcm7445_regs_cfg[] = { /* increases ADC latency by 24ns */ { MII_BCM54XX_EXP_SEL, 0x0038 }, { MII_BCM54XX_EXP_DATA, 0xAB95 }, /* increases internal 1V LDO voltage by 5% */ { MII_BCM54XX_EXP_SEL, 0x2038 }, { MII_BCM54XX_EXP_DATA, 0xBB22 }, /* reduce RX low pass filter corner frequency */ { MII_BCM54XX_EXP_SEL, 0x6038 }, { MII_BCM54XX_EXP_DATA, 0xFFC5 }, /* reduce RX high pass filter corner frequency */ { MII_BCM54XX_EXP_SEL, 0x003a }, { MII_BCM54XX_EXP_DATA, 0x2002 }, }; unsigned int i; for (i = 0; i < ARRAY_SIZE(bcm7445_regs_cfg); i++) { ret = phy_write(phydev, bcm7445_regs_cfg[i].reg, bcm7445_regs_cfg[i].value); if (ret) return ret; } return 0; } static void phy_write_exp(struct phy_device *phydev, u16 reg, u16 value) { phy_write(phydev, MII_BCM54XX_EXP_SEL, MII_BCM54XX_EXP_SEL_ER | reg); phy_write(phydev, MII_BCM54XX_EXP_DATA, value); } static void phy_write_misc(struct phy_device *phydev, u16 reg, u16 chl, u16 value) { int tmp; phy_write(phydev, MII_BCM54XX_AUX_CTL, MII_BCM54XX_AUXCTL_SHDWSEL_MISC); tmp = phy_read(phydev, MII_BCM54XX_AUX_CTL); tmp |= MII_BCM54XX_AUXCTL_ACTL_SMDSP_ENA; phy_write(phydev, MII_BCM54XX_AUX_CTL, tmp); tmp = (chl * MII_BCM7XXX_CHANNEL_WIDTH) | reg; phy_write(phydev, MII_BCM54XX_EXP_SEL, tmp); phy_write(phydev, MII_BCM54XX_EXP_DATA, value); } static int bcm7xxx_28nm_afe_config_init(struct phy_device *phydev) { /* Increase VCO range to prevent unlocking problem of PLL at low * temp */ phy_write_misc(phydev, PLL_PLLCTRL_1, 0x0048); /* Change Ki to 011 */ phy_write_misc(phydev, PLL_PLLCTRL_2, 0x021b); /* Disable loading of TVCO buffer to bandgap, set bandgap trim * to 111 */ phy_write_misc(phydev, PLL_PLLCTRL_4, 0x0e20); /* Adjust bias current trim by -3 */ phy_write_misc(phydev, DSP_TAP10, 0x690b); /* Switch to CORE_BASE1E */ phy_write(phydev, MII_BCM7XXX_CORE_BASE1E, 0xd); /* Reset R_CAL/RC_CAL Engine */ phy_write_exp(phydev, CORE_EXPB0, 0x0010); /* Disable Reset R_CAL/RC_CAL Engine */ phy_write_exp(phydev, CORE_EXPB0, 0x0000); /* write AFE_RXCONFIG_0 */ phy_write_misc(phydev, AFE_RXCONFIG_0, 0xeb19); /* write AFE_RXCONFIG_1 */ phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9a3f); /* write AFE_RX_LP_COUNTER */ phy_write_misc(phydev, AFE_RX_LP_COUNTER, 0x7fc0); /* write AFE_HPF_TRIM_OTHERS */ phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x000b); /* write AFTE_TX_CONFIG */ phy_write_misc(phydev, AFE_TX_CONFIG, 0x0800); return 0; } static int bcm7xxx_apd_enable(struct phy_device *phydev) { int val; /* Enable powering down of the DLL during auto-power down */ val = bcm54xx_shadow_read(phydev, BCM54XX_SHD_SCR3); if (val < 0) return val; val |= BCM54XX_SHD_SCR3_DLLAPD_DIS; bcm54xx_shadow_write(phydev, BCM54XX_SHD_SCR3, val); /* Enable auto-power down */ val = bcm54xx_shadow_read(phydev, BCM54XX_SHD_APD); if (val < 0) return val; val |= BCM54XX_SHD_APD_EN; return bcm54xx_shadow_write(phydev, BCM54XX_SHD_APD, val); } static int bcm7xxx_eee_enable(struct phy_device *phydev) { int val; val = phy_read_mmd_indirect(phydev, BRCM_CL45VEN_EEE_CONTROL, MDIO_MMD_AN, phydev->addr); if (val < 0) return val; /* Enable general EEE feature at the PHY level */ val |= LPI_FEATURE_EN | LPI_FEATURE_EN_DIG1000X; phy_write_mmd_indirect(phydev, BRCM_CL45VEN_EEE_CONTROL, MDIO_MMD_AN, phydev->addr, val); /* Advertise supported modes */ val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, phydev->addr); val |= (MDIO_AN_EEE_ADV_100TX | MDIO_AN_EEE_ADV_1000T); phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, phydev->addr, val); 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); int ret = 0; pr_info_once("%s: %s PHY revision: 0x%02x, patch: %d\n", dev_name(&phydev->dev), phydev->drv->name, rev, patch); switch (rev) { case 0xa0: case 0xb0: ret = bcm7445_config_init(phydev); break; default: ret = bcm7xxx_28nm_afe_config_init(phydev); break; } if (ret) return ret; ret = bcm7xxx_eee_enable(phydev); if (ret) return ret; return bcm7xxx_apd_enable(phydev); } 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_BCM7XX_64CLK_MDIO); phy_read(phydev, MII_BCM7XXX_AUX_MODE); /* Workaround only required for 100Mbits/sec capable PHYs */ if (phydev->supported & PHY_GBIT_FEATURES) return 0; /* 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, MII_BCM7XXX_SHD_MODE_2, 0); 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_dummy_config_init(struct phy_device *phydev) { 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_afe_config_init, \ .config_aneg = genphy_config_aneg, \ .read_status = genphy_read_status, \ .resume = bcm7xxx_28nm_resume, \ .driver = { .owner = THIS_MODULE }, \ } 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_BCM7445, "Broadcom BCM7445"), { .phy_id = PHY_ID_BCM7425, .phy_id_mask = 0xfffffff0, .name = "Broadcom BCM7425", .features = PHY_GBIT_FEATURES | SUPPORTED_Pause | SUPPORTED_Asym_Pause, .flags = 0, .config_init = bcm7xxx_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .suspend = bcm7xxx_suspend, .resume = bcm7xxx_config_init, .driver = { .owner = THIS_MODULE }, }, { .phy_id = PHY_ID_BCM7429, .phy_id_mask = 0xfffffff0, .name = "Broadcom BCM7429", .features = PHY_GBIT_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, .driver = { .owner = THIS_MODULE }, }, { .phy_id = PHY_BCM_OUI_4, .phy_id_mask = 0xffff0000, .name = "Broadcom BCM7XXX 40nm", .features = PHY_GBIT_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, .driver = { .owner = THIS_MODULE }, }, { .phy_id = PHY_BCM_OUI_5, .phy_id_mask = 0xffffff00, .name = "Broadcom BCM7XXX 65nm", .features = PHY_BASIC_FEATURES | SUPPORTED_Pause | SUPPORTED_Asym_Pause, .flags = PHY_IS_INTERNAL, .config_init = bcm7xxx_dummy_config_init, .config_aneg = genphy_config_aneg, .read_status = genphy_read_status, .suspend = bcm7xxx_suspend, .resume = bcm7xxx_config_init, .driver = { .owner = THIS_MODULE }, } }; static struct mdio_device_id __maybe_unused bcm7xxx_tbl[] = { { PHY_ID_BCM7250, 0xfffffff0, }, { PHY_ID_BCM7364, 0xfffffff0, }, { PHY_ID_BCM7366, 0xfffffff0, }, { PHY_ID_BCM7425, 0xfffffff0, }, { PHY_ID_BCM7429, 0xfffffff0, }, { PHY_ID_BCM7439, 0xfffffff0, }, { PHY_ID_BCM7445, 0xfffffff0, }, { PHY_BCM_OUI_4, 0xffff0000 }, { PHY_BCM_OUI_5, 0xffffff00 }, { } }; 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");