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250 lines
5.8 KiB
250 lines
5.8 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* HWMON driver for Aquantia PHY |
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* |
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* Author: Nikita Yushchenko <[email protected]> |
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* Author: Andrew Lunn <[email protected]> |
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* Author: Heiner Kallweit <[email protected]> |
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*/ |
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#include <linux/phy.h> |
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#include <linux/device.h> |
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#include <linux/ctype.h> |
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#include <linux/hwmon.h> |
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#include "aquantia.h" |
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/* Vendor specific 1, MDIO_MMD_VEND2 */ |
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#define VEND1_THERMAL_PROV_HIGH_TEMP_FAIL 0xc421 |
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#define VEND1_THERMAL_PROV_LOW_TEMP_FAIL 0xc422 |
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#define VEND1_THERMAL_PROV_HIGH_TEMP_WARN 0xc423 |
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#define VEND1_THERMAL_PROV_LOW_TEMP_WARN 0xc424 |
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#define VEND1_THERMAL_STAT1 0xc820 |
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#define VEND1_THERMAL_STAT2 0xc821 |
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#define VEND1_THERMAL_STAT2_VALID BIT(0) |
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#define VEND1_GENERAL_STAT1 0xc830 |
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#define VEND1_GENERAL_STAT1_HIGH_TEMP_FAIL BIT(14) |
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#define VEND1_GENERAL_STAT1_LOW_TEMP_FAIL BIT(13) |
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#define VEND1_GENERAL_STAT1_HIGH_TEMP_WARN BIT(12) |
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#define VEND1_GENERAL_STAT1_LOW_TEMP_WARN BIT(11) |
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#if IS_REACHABLE(CONFIG_HWMON) |
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static umode_t aqr_hwmon_is_visible(const void *data, |
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enum hwmon_sensor_types type, |
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u32 attr, int channel) |
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{ |
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if (type != hwmon_temp) |
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return 0; |
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switch (attr) { |
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case hwmon_temp_input: |
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case hwmon_temp_min_alarm: |
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case hwmon_temp_max_alarm: |
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case hwmon_temp_lcrit_alarm: |
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case hwmon_temp_crit_alarm: |
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return 0444; |
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case hwmon_temp_min: |
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case hwmon_temp_max: |
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case hwmon_temp_lcrit: |
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case hwmon_temp_crit: |
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return 0644; |
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default: |
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return 0; |
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} |
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} |
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static int aqr_hwmon_get(struct phy_device *phydev, int reg, long *value) |
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{ |
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int temp = phy_read_mmd(phydev, MDIO_MMD_VEND1, reg); |
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if (temp < 0) |
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return temp; |
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/* 16 bit value is 2's complement with LSB = 1/256th degree Celsius */ |
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*value = (s16)temp * 1000 / 256; |
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return 0; |
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} |
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static int aqr_hwmon_set(struct phy_device *phydev, int reg, long value) |
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{ |
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int temp; |
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if (value >= 128000 || value < -128000) |
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return -ERANGE; |
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temp = value * 256 / 1000; |
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/* temp is in s16 range and we're interested in lower 16 bits only */ |
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return phy_write_mmd(phydev, MDIO_MMD_VEND1, reg, (u16)temp); |
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} |
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static int aqr_hwmon_test_bit(struct phy_device *phydev, int reg, int bit) |
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{ |
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int val = phy_read_mmd(phydev, MDIO_MMD_VEND1, reg); |
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if (val < 0) |
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return val; |
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return !!(val & bit); |
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} |
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static int aqr_hwmon_status1(struct phy_device *phydev, int bit, long *value) |
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{ |
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int val = aqr_hwmon_test_bit(phydev, VEND1_GENERAL_STAT1, bit); |
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if (val < 0) |
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return val; |
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*value = val; |
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return 0; |
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} |
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static int aqr_hwmon_read(struct device *dev, enum hwmon_sensor_types type, |
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u32 attr, int channel, long *value) |
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{ |
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struct phy_device *phydev = dev_get_drvdata(dev); |
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int reg; |
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if (type != hwmon_temp) |
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return -EOPNOTSUPP; |
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switch (attr) { |
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case hwmon_temp_input: |
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reg = aqr_hwmon_test_bit(phydev, VEND1_THERMAL_STAT2, |
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VEND1_THERMAL_STAT2_VALID); |
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if (reg < 0) |
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return reg; |
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if (!reg) |
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return -EBUSY; |
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return aqr_hwmon_get(phydev, VEND1_THERMAL_STAT1, value); |
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case hwmon_temp_lcrit: |
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return aqr_hwmon_get(phydev, VEND1_THERMAL_PROV_LOW_TEMP_FAIL, |
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value); |
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case hwmon_temp_min: |
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return aqr_hwmon_get(phydev, VEND1_THERMAL_PROV_LOW_TEMP_WARN, |
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value); |
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case hwmon_temp_max: |
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return aqr_hwmon_get(phydev, VEND1_THERMAL_PROV_HIGH_TEMP_WARN, |
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value); |
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case hwmon_temp_crit: |
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return aqr_hwmon_get(phydev, VEND1_THERMAL_PROV_HIGH_TEMP_FAIL, |
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value); |
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case hwmon_temp_lcrit_alarm: |
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return aqr_hwmon_status1(phydev, |
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VEND1_GENERAL_STAT1_LOW_TEMP_FAIL, |
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value); |
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case hwmon_temp_min_alarm: |
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return aqr_hwmon_status1(phydev, |
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VEND1_GENERAL_STAT1_LOW_TEMP_WARN, |
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value); |
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case hwmon_temp_max_alarm: |
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return aqr_hwmon_status1(phydev, |
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VEND1_GENERAL_STAT1_HIGH_TEMP_WARN, |
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value); |
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case hwmon_temp_crit_alarm: |
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return aqr_hwmon_status1(phydev, |
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VEND1_GENERAL_STAT1_HIGH_TEMP_FAIL, |
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value); |
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default: |
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return -EOPNOTSUPP; |
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} |
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} |
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static int aqr_hwmon_write(struct device *dev, enum hwmon_sensor_types type, |
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u32 attr, int channel, long value) |
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{ |
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struct phy_device *phydev = dev_get_drvdata(dev); |
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if (type != hwmon_temp) |
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return -EOPNOTSUPP; |
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switch (attr) { |
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case hwmon_temp_lcrit: |
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return aqr_hwmon_set(phydev, VEND1_THERMAL_PROV_LOW_TEMP_FAIL, |
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value); |
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case hwmon_temp_min: |
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return aqr_hwmon_set(phydev, VEND1_THERMAL_PROV_LOW_TEMP_WARN, |
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value); |
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case hwmon_temp_max: |
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return aqr_hwmon_set(phydev, VEND1_THERMAL_PROV_HIGH_TEMP_WARN, |
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value); |
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case hwmon_temp_crit: |
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return aqr_hwmon_set(phydev, VEND1_THERMAL_PROV_HIGH_TEMP_FAIL, |
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value); |
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default: |
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return -EOPNOTSUPP; |
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} |
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} |
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static const struct hwmon_ops aqr_hwmon_ops = { |
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.is_visible = aqr_hwmon_is_visible, |
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.read = aqr_hwmon_read, |
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.write = aqr_hwmon_write, |
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}; |
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static u32 aqr_hwmon_chip_config[] = { |
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HWMON_C_REGISTER_TZ, |
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0, |
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}; |
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static const struct hwmon_channel_info aqr_hwmon_chip = { |
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.type = hwmon_chip, |
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.config = aqr_hwmon_chip_config, |
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}; |
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static u32 aqr_hwmon_temp_config[] = { |
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HWMON_T_INPUT | |
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HWMON_T_MAX | HWMON_T_MIN | |
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HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | |
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HWMON_T_CRIT | HWMON_T_LCRIT | |
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HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM, |
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0, |
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}; |
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static const struct hwmon_channel_info aqr_hwmon_temp = { |
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.type = hwmon_temp, |
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.config = aqr_hwmon_temp_config, |
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}; |
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static const struct hwmon_channel_info *aqr_hwmon_info[] = { |
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&aqr_hwmon_chip, |
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&aqr_hwmon_temp, |
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NULL, |
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}; |
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static const struct hwmon_chip_info aqr_hwmon_chip_info = { |
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.ops = &aqr_hwmon_ops, |
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.info = aqr_hwmon_info, |
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}; |
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int aqr_hwmon_probe(struct phy_device *phydev) |
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{ |
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struct device *dev = &phydev->mdio.dev; |
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struct device *hwmon_dev; |
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char *hwmon_name; |
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int i, j; |
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hwmon_name = devm_kstrdup(dev, dev_name(dev), GFP_KERNEL); |
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if (!hwmon_name) |
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return -ENOMEM; |
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for (i = j = 0; hwmon_name[i]; i++) { |
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if (isalnum(hwmon_name[i])) { |
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if (i != j) |
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hwmon_name[j] = hwmon_name[i]; |
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j++; |
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} |
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} |
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hwmon_name[j] = '\0'; |
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hwmon_dev = devm_hwmon_device_register_with_info(dev, hwmon_name, |
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phydev, &aqr_hwmon_chip_info, NULL); |
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return PTR_ERR_OR_ZERO(hwmon_dev); |
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} |
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#endif
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