--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/* NXP TJA1100 BroadRReach PHY driver
+ *
+ * Copyright (C) 2018 Marek Vasut <marex@denx.de>
+ */
+#include <linux/delay.h>
+#include <linux/ethtool.h>
+#include <linux/kernel.h>
+#include <linux/mii.h>
+#include <linux/module.h>
+#include <linux/phy.h>
+#include <linux/hwmon.h>
+#include <linux/bitfield.h>
+
+#define PHY_ID_MASK 0xfffffff0
+#define PHY_ID_TJA1100 0x0180dc40
+#define PHY_ID_TJA1101 0x0180dd00
+
+#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_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_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 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 i, ret;
+
+ for (i = 0; i < 200; i++) {
+ ret = phy_read(phydev, reg);
+ if (ret < 0)
+ return ret;
+
+ if ((ret & mask) == set)
+ return 0;
+
+ usleep_range(100, 150);
+ }
+
+ return -ETIMEDOUT;
+}
+
+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_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:
+ 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;
+
+ ret = genphy_update_link(phydev);
+ if (ret)
+ return ret;
+
+ 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 u32 tja11xx_hwmon_in_config[] = {
+ HWMON_I_LCRIT_ALARM,
+ 0
+};
+
+static const struct hwmon_channel_info tja11xx_hwmon_in = {
+ .type = hwmon_in,
+ .config = tja11xx_hwmon_in_config,
+};
+
+static u32 tja11xx_hwmon_temp_config[] = {
+ HWMON_T_CRIT_ALARM,
+ 0
+};
+
+static const struct hwmon_channel_info tja11xx_hwmon_temp = {
+ .type = hwmon_temp,
+ .config = tja11xx_hwmon_temp_config,
+};
+
+static const struct hwmon_channel_info *tja11xx_hwmon_info[] = {
+ &tja11xx_hwmon_in,
+ &tja11xx_hwmon_temp,
+ 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_probe(struct phy_device *phydev)
+{
+ 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;
+
+ 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 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_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_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,
+ }
+};
+
+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) },
+ { }
+};
+
+MODULE_DEVICE_TABLE(mdio, tja11xx_tbl);
+
+MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
+MODULE_DESCRIPTION("NXP TJA11xx BoardR-Reach PHY driver");
+MODULE_LICENSE("GPL");
projects / platform / kernel / linux-rpi.git / commitdiff