diff options
Diffstat (limited to 'drivers/net/phy/nxp-tja11xx.c')
| -rw-r--r-- | drivers/net/phy/nxp-tja11xx.c | 412 |
1 files changed, 406 insertions, 6 deletions
diff --git a/drivers/net/phy/nxp-tja11xx.c b/drivers/net/phy/nxp-tja11xx.c index 47caae770ffc..a72fa0d2e7c7 100644 --- a/drivers/net/phy/nxp-tja11xx.c +++ b/drivers/net/phy/nxp-tja11xx.c @@ -5,16 +5,21 @@ */ #include <linux/delay.h> #include <linux/ethtool.h> +#include <linux/ethtool_netlink.h> #include <linux/kernel.h> +#include <linux/mdio.h> #include <linux/mii.h> #include <linux/module.h> #include <linux/phy.h> #include <linux/hwmon.h> #include <linux/bitfield.h> +#include <linux/of_mdio.h> +#include <linux/of_irq.h> #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) @@ -22,10 +27,12 @@ #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_CABLE_TEST BIT(5) #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) @@ -40,18 +47,31 @@ #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_COMMSTAT_SQI_STATE GENMASK(7, 5) +#define MII_COMMSTAT_SQI_MAX 7 #define MII_GENSTAT 24 #define MII_GENSTAT_PLL_LOCKED BIT(14) +#define MII_EXTSTAT 25 +#define MII_EXTSTAT_SHORT_DETECT BIT(8) +#define MII_EXTSTAT_OPEN_DETECT BIT(7) +#define MII_EXTSTAT_POLARITY_DETECT BIT(6) + #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 { @@ -100,6 +120,11 @@ static int tja11xx_enable_link_control(struct phy_device *phydev) return phy_set_bits(phydev, MII_ECTRL, MII_ECTRL_LINK_CONTROL); } +static int tja11xx_disable_link_control(struct phy_device *phydev) +{ + return phy_clear_bits(phydev, MII_ECTRL, MII_ECTRL_LINK_CONTROL); +} + static int tja11xx_wakeup(struct phy_device *phydev) { int ret; @@ -157,6 +182,70 @@ static int tja11xx_soft_reset(struct phy_device *phydev) return genphy_soft_reset(phydev); } +static int tja11xx_config_aneg_cable_test(struct phy_device *phydev) +{ + bool finished = false; + int ret; + + if (phydev->link) + return 0; + + if (!phydev->drv->cable_test_start || + !phydev->drv->cable_test_get_status) + return 0; + + ret = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF); + if (ret) + return ret; + + ret = phydev->drv->cable_test_start(phydev); + if (ret) + return ret; + + /* According to the documentation this test takes 100 usec */ + usleep_range(100, 200); + + ret = phydev->drv->cable_test_get_status(phydev, &finished); + if (ret) + return ret; + + if (finished) + ethnl_cable_test_finished(phydev); + + return 0; +} + +static int tja11xx_config_aneg(struct phy_device *phydev) +{ + int ret, changed = 0; + u16 ctl = 0; + + 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: + goto do_test; + default: + phydev_warn(phydev, "Unsupported Master/Slave mode\n"); + return -ENOTSUPP; + } + + changed = phy_modify_changed(phydev, MII_CFG1, MII_CFG1_MASTER_SLAVE, ctl); + if (changed < 0) + return changed; + +do_test: + ret = tja11xx_config_aneg_cable_test(phydev); + if (ret) + return ret; + + return __genphy_config_aneg(phydev, changed); +} + static int tja11xx_config_init(struct phy_device *phydev) { int ret; @@ -180,6 +269,7 @@ static int tja11xx_config_init(struct phy_device *phydev) 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; @@ -213,10 +303,22 @@ 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) @@ -229,6 +331,22 @@ static int tja11xx_read_status(struct phy_device *phydev) return 0; } +static int tja11xx_get_sqi(struct phy_device *phydev) +{ + int ret; + + ret = phy_read(phydev, MII_COMMSTAT); + if (ret < 0) + return ret; + + return FIELD_GET(MII_COMMSTAT_SQI_STATE, ret); +} + +static int tja11xx_get_sqi_max(struct phy_device *phydev) +{ + return MII_COMMSTAT_SQI_MAX; +} + static int tja11xx_get_sset_count(struct phy_device *phydev) { return ARRAY_SIZE(tja11xx_hw_stats); @@ -317,16 +435,12 @@ static const struct hwmon_chip_info tja11xx_hwmon_chip_info = { .info = tja11xx_hwmon_info, }; -static int tja11xx_probe(struct phy_device *phydev) +static int tja11xx_hwmon_register(struct phy_device *phydev, + struct tja11xx_priv *priv) { struct device *dev = &phydev->mdio.dev; - struct tja11xx_priv *priv; int i; - priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - priv->hwmon_name = devm_kstrdup(dev, dev_name(dev), GFP_KERNEL); if (!priv->hwmon_name) return -ENOMEM; @@ -344,6 +458,239 @@ static int tja11xx_probe(struct phy_device *phydev) 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 int tja11xx_cable_test_start(struct phy_device *phydev) +{ + int ret; + + ret = phy_clear_bits(phydev, MII_COMMCFG, MII_COMMCFG_AUTO_OP); + if (ret) + return ret; + + ret = tja11xx_wakeup(phydev); + if (ret < 0) + return ret; + + ret = tja11xx_disable_link_control(phydev); + if (ret < 0) + return ret; + + return phy_set_bits(phydev, MII_ECTRL, MII_ECTRL_CABLE_TEST); +} + +/* + * | BI_DA+ | BI_DA- | Result + * | open | open | open + * | + short to - | - short to + | short + * | short to Vdd | open | open + * | open | shot to Vdd | open + * | short to Vdd | short to Vdd | short + * | shot to GND | open | open + * | open | shot to GND | open + * | short to GND | shot to GND | short + * | connected to active link partner (master) | shot and open + */ +static int tja11xx_cable_test_report_trans(u32 result) +{ + u32 mask = MII_EXTSTAT_SHORT_DETECT | MII_EXTSTAT_OPEN_DETECT; + + if ((result & mask) == mask) { + /* connected to active link partner (master) */ + return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC; + } else if ((result & mask) == 0) { + return ETHTOOL_A_CABLE_RESULT_CODE_OK; + } else if (result & MII_EXTSTAT_SHORT_DETECT) { + return ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT; + } else if (result & MII_EXTSTAT_OPEN_DETECT) { + return ETHTOOL_A_CABLE_RESULT_CODE_OPEN; + } else { + return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC; + } +} + +static int tja11xx_cable_test_report(struct phy_device *phydev) +{ + int ret; + + ret = phy_read(phydev, MII_EXTSTAT); + if (ret < 0) + return ret; + + ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_A, + tja11xx_cable_test_report_trans(ret)); + + return 0; +} + +static int tja11xx_cable_test_get_status(struct phy_device *phydev, + bool *finished) +{ + int ret; + + *finished = false; + + ret = phy_read(phydev, MII_ECTRL); + if (ret < 0) + return ret; + + if (!(ret & MII_ECTRL_CABLE_TEST)) { + *finished = true; + + ret = phy_set_bits(phydev, MII_COMMCFG, MII_COMMCFG_AUTO_OP); + if (ret) + return ret; + + return tja11xx_cable_test_report(phydev); + } + + return 0; +} + static struct phy_driver tja11xx_driver[] = { { PHY_ID_MATCH_MODEL(PHY_ID_TJA1100), @@ -351,8 +698,11 @@ static struct phy_driver tja11xx_driver[] = { .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, + .get_sqi = tja11xx_get_sqi, + .get_sqi_max = tja11xx_get_sqi_max, .suspend = genphy_suspend, .resume = genphy_resume, .set_loopback = genphy_loopback, @@ -366,8 +716,53 @@ static struct phy_driver tja11xx_driver[] = { .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, + .get_sqi = tja11xx_get_sqi, + .get_sqi_max = tja11xx_get_sqi_max, + .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, + .flags = PHY_POLL_CABLE_TEST, + .probe = tja1102_p0_probe, + .soft_reset = tja11xx_soft_reset, + .config_aneg = tja11xx_config_aneg, + .config_init = tja11xx_config_init, + .read_status = tja11xx_read_status, + .get_sqi = tja11xx_get_sqi, + .get_sqi_max = tja11xx_get_sqi_max, + .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, + .cable_test_start = tja11xx_cable_test_start, + .cable_test_get_status = tja11xx_cable_test_get_status, + }, { + .name = "NXP TJA1102 Port 1", + .features = PHY_BASIC_T1_FEATURES, + .flags = PHY_POLL_CABLE_TEST, + /* 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, + .get_sqi = tja11xx_get_sqi, + .get_sqi_max = tja11xx_get_sqi_max, + .match_phy_device = tja1102_p1_match_phy_device, .suspend = genphy_suspend, .resume = genphy_resume, .set_loopback = genphy_loopback, @@ -375,6 +770,10 @@ static struct phy_driver tja11xx_driver[] = { .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, + .cable_test_start = tja11xx_cable_test_start, + .cable_test_get_status = tja11xx_cable_test_get_status, } }; @@ -383,6 +782,7 @@ 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) }, { } }; |