// SPDX-License-Identifier: GPL-2.0 /* NXP TJA1100 BroadRReach PHY driver * * Copyright (C) 2018 Marek Vasut */ #include #include #include #include #include #include #include #include #include #include #include #define PHY_ID_MASK 0xfffffff0 #define PHY_ID_TJA1100 0x0180dc40 #define PHY_ID_TJA1101 0x0180dd00 #define PHY_ID_TJA1102 0x0180dc80 #define MII_ECTRL 17 #define MII_ECTRL_LINK_CONTROL BIT(15) #define MII_ECTRL_POWER_MODE_MASK GENMASK(14, 11) #define MII_ECTRL_POWER_MODE_NO_CHANGE (0x0 << 11) #define MII_ECTRL_POWER_MODE_NORMAL (0x3 << 11) #define MII_ECTRL_POWER_MODE_STANDBY (0xc << 11) #define MII_ECTRL_CONFIG_EN BIT(2) #define MII_ECTRL_WAKE_REQUEST BIT(0) #define MII_CFG1 18 #define MII_CFG1_MASTER_SLAVE BIT(15) #define MII_CFG1_AUTO_OP BIT(14) #define MII_CFG1_SLEEP_CONFIRM BIT(6) #define MII_CFG1_LED_MODE_MASK GENMASK(5, 4) #define MII_CFG1_LED_MODE_LINKUP 0 #define MII_CFG1_LED_ENABLE BIT(3) #define MII_CFG2 19 #define MII_CFG2_SLEEP_REQUEST_TO GENMASK(1, 0) #define MII_CFG2_SLEEP_REQUEST_TO_16MS 0x3 #define MII_INTSRC 21 #define MII_INTSRC_TEMP_ERR BIT(1) #define MII_INTSRC_UV_ERR BIT(3) #define MII_INTEN 22 #define MII_INTEN_LINK_FAIL BIT(10) #define MII_INTEN_LINK_UP BIT(9) #define MII_COMMSTAT 23 #define MII_COMMSTAT_LINK_UP BIT(15) #define MII_GENSTAT 24 #define MII_GENSTAT_PLL_LOCKED BIT(14) #define MII_COMMCFG 27 #define MII_COMMCFG_AUTO_OP BIT(15) struct tja11xx_priv { char *hwmon_name; struct device *hwmon_dev; struct phy_device *phydev; struct work_struct phy_register_work; }; struct tja11xx_phy_stats { const char *string; u8 reg; u8 off; u16 mask; }; static struct tja11xx_phy_stats tja11xx_hw_stats[] = { { "phy_symbol_error_count", 20, 0, GENMASK(15, 0) }, { "phy_polarity_detect", 25, 6, BIT(6) }, { "phy_open_detect", 25, 7, BIT(7) }, { "phy_short_detect", 25, 8, BIT(8) }, { "phy_rem_rcvr_count", 26, 0, GENMASK(7, 0) }, { "phy_loc_rcvr_count", 26, 8, GENMASK(15, 8) }, }; static int tja11xx_check(struct phy_device *phydev, u8 reg, u16 mask, u16 set) { int val; return phy_read_poll_timeout(phydev, reg, val, (val & mask) == set, 150, 30000, false); } static int phy_modify_check(struct phy_device *phydev, u8 reg, u16 mask, u16 set) { int ret; ret = phy_modify(phydev, reg, mask, set); if (ret) return ret; return tja11xx_check(phydev, reg, mask, set); } static int tja11xx_enable_reg_write(struct phy_device *phydev) { return phy_set_bits(phydev, MII_ECTRL, MII_ECTRL_CONFIG_EN); } static int tja11xx_enable_link_control(struct phy_device *phydev) { return phy_set_bits(phydev, MII_ECTRL, MII_ECTRL_LINK_CONTROL); } static int tja11xx_wakeup(struct phy_device *phydev) { int ret; ret = phy_read(phydev, MII_ECTRL); if (ret < 0) return ret; switch (ret & MII_ECTRL_POWER_MODE_MASK) { case MII_ECTRL_POWER_MODE_NO_CHANGE: break; case MII_ECTRL_POWER_MODE_NORMAL: ret = phy_set_bits(phydev, MII_ECTRL, MII_ECTRL_WAKE_REQUEST); if (ret) return ret; ret = phy_clear_bits(phydev, MII_ECTRL, MII_ECTRL_WAKE_REQUEST); if (ret) return ret; break; case MII_ECTRL_POWER_MODE_STANDBY: ret = phy_modify_check(phydev, MII_ECTRL, MII_ECTRL_POWER_MODE_MASK, MII_ECTRL_POWER_MODE_STANDBY); if (ret) return ret; ret = phy_modify(phydev, MII_ECTRL, MII_ECTRL_POWER_MODE_MASK, MII_ECTRL_POWER_MODE_NORMAL); if (ret) return ret; ret = phy_modify_check(phydev, MII_GENSTAT, MII_GENSTAT_PLL_LOCKED, MII_GENSTAT_PLL_LOCKED); if (ret) return ret; return tja11xx_enable_link_control(phydev); default: break; } return 0; } static int tja11xx_soft_reset(struct phy_device *phydev) { int ret; ret = tja11xx_enable_reg_write(phydev); if (ret) return ret; return genphy_soft_reset(phydev); } static int tja11xx_config_aneg(struct phy_device *phydev) { u16 ctl = 0; int ret; switch (phydev->master_slave_set) { case MASTER_SLAVE_CFG_MASTER_FORCE: ctl |= MII_CFG1_MASTER_SLAVE; break; case MASTER_SLAVE_CFG_SLAVE_FORCE: break; case MASTER_SLAVE_CFG_UNKNOWN: case MASTER_SLAVE_CFG_UNSUPPORTED: return 0; default: phydev_warn(phydev, "Unsupported Master/Slave mode\n"); return -ENOTSUPP; } ret = phy_modify_changed(phydev, MII_CFG1, MII_CFG1_MASTER_SLAVE, ctl); if (ret < 0) return ret; return __genphy_config_aneg(phydev, ret); } static int tja11xx_config_init(struct phy_device *phydev) { int ret; ret = tja11xx_enable_reg_write(phydev); if (ret) return ret; phydev->autoneg = AUTONEG_DISABLE; phydev->speed = SPEED_100; phydev->duplex = DUPLEX_FULL; switch (phydev->phy_id & PHY_ID_MASK) { case PHY_ID_TJA1100: ret = phy_modify(phydev, MII_CFG1, MII_CFG1_AUTO_OP | MII_CFG1_LED_MODE_MASK | MII_CFG1_LED_ENABLE, MII_CFG1_AUTO_OP | MII_CFG1_LED_MODE_LINKUP | MII_CFG1_LED_ENABLE); if (ret) return ret; break; case PHY_ID_TJA1101: case PHY_ID_TJA1102: ret = phy_set_bits(phydev, MII_COMMCFG, MII_COMMCFG_AUTO_OP); if (ret) return ret; break; default: return -EINVAL; } ret = phy_clear_bits(phydev, MII_CFG1, MII_CFG1_SLEEP_CONFIRM); if (ret) return ret; ret = phy_modify(phydev, MII_CFG2, MII_CFG2_SLEEP_REQUEST_TO, MII_CFG2_SLEEP_REQUEST_TO_16MS); if (ret) return ret; ret = tja11xx_wakeup(phydev); if (ret < 0) return ret; /* ACK interrupts by reading the status register */ ret = phy_read(phydev, MII_INTSRC); if (ret < 0) return ret; return 0; } static int tja11xx_read_status(struct phy_device *phydev) { int ret; phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN; phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED; ret = genphy_update_link(phydev); if (ret) return ret; ret = phy_read(phydev, MII_CFG1); if (ret < 0) return ret; if (ret & MII_CFG1_MASTER_SLAVE) phydev->master_slave_get = MASTER_SLAVE_CFG_MASTER_FORCE; else phydev->master_slave_get = MASTER_SLAVE_CFG_SLAVE_FORCE; if (phydev->link) { ret = phy_read(phydev, MII_COMMSTAT); if (ret < 0) return ret; if (!(ret & MII_COMMSTAT_LINK_UP)) phydev->link = 0; } return 0; } static int tja11xx_get_sset_count(struct phy_device *phydev) { return ARRAY_SIZE(tja11xx_hw_stats); } static void tja11xx_get_strings(struct phy_device *phydev, u8 *data) { int i; for (i = 0; i < ARRAY_SIZE(tja11xx_hw_stats); i++) { strncpy(data + i * ETH_GSTRING_LEN, tja11xx_hw_stats[i].string, ETH_GSTRING_LEN); } } static void tja11xx_get_stats(struct phy_device *phydev, struct ethtool_stats *stats, u64 *data) { int i, ret; for (i = 0; i < ARRAY_SIZE(tja11xx_hw_stats); i++) { ret = phy_read(phydev, tja11xx_hw_stats[i].reg); if (ret < 0) data[i] = U64_MAX; else { data[i] = ret & tja11xx_hw_stats[i].mask; data[i] >>= tja11xx_hw_stats[i].off; } } } static int tja11xx_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *value) { struct phy_device *phydev = dev_get_drvdata(dev); int ret; if (type == hwmon_in && attr == hwmon_in_lcrit_alarm) { ret = phy_read(phydev, MII_INTSRC); if (ret < 0) return ret; *value = !!(ret & MII_INTSRC_TEMP_ERR); return 0; } if (type == hwmon_temp && attr == hwmon_temp_crit_alarm) { ret = phy_read(phydev, MII_INTSRC); if (ret < 0) return ret; *value = !!(ret & MII_INTSRC_UV_ERR); return 0; } return -EOPNOTSUPP; } static umode_t tja11xx_hwmon_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, int channel) { if (type == hwmon_in && attr == hwmon_in_lcrit_alarm) return 0444; if (type == hwmon_temp && attr == hwmon_temp_crit_alarm) return 0444; return 0; } static const struct hwmon_channel_info *tja11xx_hwmon_info[] = { HWMON_CHANNEL_INFO(in, HWMON_I_LCRIT_ALARM), HWMON_CHANNEL_INFO(temp, HWMON_T_CRIT_ALARM), NULL }; static const struct hwmon_ops tja11xx_hwmon_hwmon_ops = { .is_visible = tja11xx_hwmon_is_visible, .read = tja11xx_hwmon_read, }; static const struct hwmon_chip_info tja11xx_hwmon_chip_info = { .ops = &tja11xx_hwmon_hwmon_ops, .info = tja11xx_hwmon_info, }; static int tja11xx_hwmon_register(struct phy_device *phydev, struct tja11xx_priv *priv) { struct device *dev = &phydev->mdio.dev; int i; priv->hwmon_name = devm_kstrdup(dev, dev_name(dev), GFP_KERNEL); if (!priv->hwmon_name) return -ENOMEM; for (i = 0; priv->hwmon_name[i]; i++) if (hwmon_is_bad_char(priv->hwmon_name[i])) priv->hwmon_name[i] = '_'; priv->hwmon_dev = devm_hwmon_device_register_with_info(dev, priv->hwmon_name, phydev, &tja11xx_hwmon_chip_info, NULL); return PTR_ERR_OR_ZERO(priv->hwmon_dev); } static int tja11xx_probe(struct phy_device *phydev) { struct device *dev = &phydev->mdio.dev; struct tja11xx_priv *priv; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->phydev = phydev; return tja11xx_hwmon_register(phydev, priv); } static void tja1102_p1_register(struct work_struct *work) { struct tja11xx_priv *priv = container_of(work, struct tja11xx_priv, phy_register_work); struct phy_device *phydev_phy0 = priv->phydev; struct mii_bus *bus = phydev_phy0->mdio.bus; struct device *dev = &phydev_phy0->mdio.dev; struct device_node *np = dev->of_node; struct device_node *child; int ret; for_each_available_child_of_node(np, child) { struct phy_device *phy; int addr; addr = of_mdio_parse_addr(dev, child); if (addr < 0) { dev_err(dev, "Can't parse addr\n"); continue; } else if (addr != phydev_phy0->mdio.addr + 1) { /* Currently we care only about double PHY chip TJA1102. * If some day NXP will decide to bring chips with more * PHYs, this logic should be reworked. */ dev_err(dev, "Unexpected address. Should be: %i\n", phydev_phy0->mdio.addr + 1); continue; } if (mdiobus_is_registered_device(bus, addr)) { dev_err(dev, "device is already registered\n"); continue; } /* Real PHY ID of Port 1 is 0 */ phy = phy_device_create(bus, addr, PHY_ID_TJA1102, false, NULL); if (IS_ERR(phy)) { dev_err(dev, "Can't create PHY device for Port 1: %i\n", addr); continue; } /* Overwrite parent device. phy_device_create() set parent to * the mii_bus->dev, which is not correct in case. */ phy->mdio.dev.parent = dev; ret = of_mdiobus_phy_device_register(bus, phy, child, addr); if (ret) { /* All resources needed for Port 1 should be already * available for Port 0. Both ports use the same * interrupt line, so -EPROBE_DEFER would make no sense * here. */ dev_err(dev, "Can't register Port 1. Unexpected error: %i\n", ret); phy_device_free(phy); } } } static int tja1102_p0_probe(struct phy_device *phydev) { struct device *dev = &phydev->mdio.dev; struct tja11xx_priv *priv; int ret; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->phydev = phydev; INIT_WORK(&priv->phy_register_work, tja1102_p1_register); ret = tja11xx_hwmon_register(phydev, priv); if (ret) return ret; schedule_work(&priv->phy_register_work); return 0; } static int tja1102_match_phy_device(struct phy_device *phydev, bool port0) { int ret; if ((phydev->phy_id & PHY_ID_MASK) != PHY_ID_TJA1102) return 0; ret = phy_read(phydev, MII_PHYSID2); if (ret < 0) return ret; /* TJA1102 Port 1 has phyid 0 and doesn't support temperature * and undervoltage alarms. */ if (port0) return ret ? 1 : 0; return !ret; } static int tja1102_p0_match_phy_device(struct phy_device *phydev) { return tja1102_match_phy_device(phydev, true); } static int tja1102_p1_match_phy_device(struct phy_device *phydev) { return tja1102_match_phy_device(phydev, false); } static int tja11xx_ack_interrupt(struct phy_device *phydev) { int ret; ret = phy_read(phydev, MII_INTSRC); return (ret < 0) ? ret : 0; } static int tja11xx_config_intr(struct phy_device *phydev) { int value = 0; if (phydev->interrupts == PHY_INTERRUPT_ENABLED) value = MII_INTEN_LINK_FAIL | MII_INTEN_LINK_UP; return phy_write(phydev, MII_INTEN, value); } static struct phy_driver tja11xx_driver[] = { { PHY_ID_MATCH_MODEL(PHY_ID_TJA1100), .name = "NXP TJA1100", .features = PHY_BASIC_T1_FEATURES, .probe = tja11xx_probe, .soft_reset = tja11xx_soft_reset, .config_aneg = tja11xx_config_aneg, .config_init = tja11xx_config_init, .read_status = tja11xx_read_status, .suspend = genphy_suspend, .resume = genphy_resume, .set_loopback = genphy_loopback, /* Statistics */ .get_sset_count = tja11xx_get_sset_count, .get_strings = tja11xx_get_strings, .get_stats = tja11xx_get_stats, }, { PHY_ID_MATCH_MODEL(PHY_ID_TJA1101), .name = "NXP TJA1101", .features = PHY_BASIC_T1_FEATURES, .probe = tja11xx_probe, .soft_reset = tja11xx_soft_reset, .config_aneg = tja11xx_config_aneg, .config_init = tja11xx_config_init, .read_status = tja11xx_read_status, .suspend = genphy_suspend, .resume = genphy_resume, .set_loopback = genphy_loopback, /* Statistics */ .get_sset_count = tja11xx_get_sset_count, .get_strings = tja11xx_get_strings, .get_stats = tja11xx_get_stats, }, { .name = "NXP TJA1102 Port 0", .features = PHY_BASIC_T1_FEATURES, .probe = tja1102_p0_probe, .soft_reset = tja11xx_soft_reset, .config_aneg = tja11xx_config_aneg, .config_init = tja11xx_config_init, .read_status = tja11xx_read_status, .match_phy_device = tja1102_p0_match_phy_device, .suspend = genphy_suspend, .resume = genphy_resume, .set_loopback = genphy_loopback, /* Statistics */ .get_sset_count = tja11xx_get_sset_count, .get_strings = tja11xx_get_strings, .get_stats = tja11xx_get_stats, .ack_interrupt = tja11xx_ack_interrupt, .config_intr = tja11xx_config_intr, }, { .name = "NXP TJA1102 Port 1", .features = PHY_BASIC_T1_FEATURES, /* currently no probe for Port 1 is need */ .soft_reset = tja11xx_soft_reset, .config_aneg = tja11xx_config_aneg, .config_init = tja11xx_config_init, .read_status = tja11xx_read_status, .match_phy_device = tja1102_p1_match_phy_device, .suspend = genphy_suspend, .resume = genphy_resume, .set_loopback = genphy_loopback, /* Statistics */ .get_sset_count = tja11xx_get_sset_count, .get_strings = tja11xx_get_strings, .get_stats = tja11xx_get_stats, .ack_interrupt = tja11xx_ack_interrupt, .config_intr = tja11xx_config_intr, } }; module_phy_driver(tja11xx_driver); static struct mdio_device_id __maybe_unused tja11xx_tbl[] = { { PHY_ID_MATCH_MODEL(PHY_ID_TJA1100) }, { PHY_ID_MATCH_MODEL(PHY_ID_TJA1101) }, { PHY_ID_MATCH_MODEL(PHY_ID_TJA1102) }, { } }; MODULE_DEVICE_TABLE(mdio, tja11xx_tbl); MODULE_AUTHOR("Marek Vasut "); MODULE_DESCRIPTION("NXP TJA11xx BoardR-Reach PHY driver"); MODULE_LICENSE("GPL");