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1// SPDX-License-Identifier: GPL-2.02/* HWMON driver for Aquantia PHY3 *4 * Author: Nikita Yushchenko <nikita.yoush@cogentembedded.com>5 * Author: Andrew Lunn <andrew@lunn.ch>6 * Author: Heiner Kallweit <hkallweit1@gmail.com>7 */8 9#include <linux/phy.h>10#include <linux/device.h>11#include <linux/ctype.h>12#include <linux/hwmon.h>13 14#include "aquantia.h"15 16#if IS_REACHABLE(CONFIG_HWMON)17 18static umode_t aqr_hwmon_is_visible(const void *data,19				    enum hwmon_sensor_types type,20				    u32 attr, int channel)21{22	if (type != hwmon_temp)23		return 0;24 25	switch (attr) {26	case hwmon_temp_input:27	case hwmon_temp_min_alarm:28	case hwmon_temp_max_alarm:29	case hwmon_temp_lcrit_alarm:30	case hwmon_temp_crit_alarm:31		return 0444;32	case hwmon_temp_min:33	case hwmon_temp_max:34	case hwmon_temp_lcrit:35	case hwmon_temp_crit:36		return 0644;37	default:38		return 0;39	}40}41 42static int aqr_hwmon_get(struct phy_device *phydev, int reg, long *value)43{44	int temp = phy_read_mmd(phydev, MDIO_MMD_VEND1, reg);45 46	if (temp < 0)47		return temp;48 49	/* 16 bit value is 2's complement with LSB = 1/256th degree Celsius */50	*value = (s16)temp * 1000 / 256;51 52	return 0;53}54 55static int aqr_hwmon_set(struct phy_device *phydev, int reg, long value)56{57	int temp;58 59	if (value >= 128000 || value < -128000)60		return -ERANGE;61 62	temp = value * 256 / 1000;63 64	/* temp is in s16 range and we're interested in lower 16 bits only */65	return phy_write_mmd(phydev, MDIO_MMD_VEND1, reg, (u16)temp);66}67 68static int aqr_hwmon_test_bit(struct phy_device *phydev, int reg, int bit)69{70	int val = phy_read_mmd(phydev, MDIO_MMD_VEND1, reg);71 72	if (val < 0)73		return val;74 75	return !!(val & bit);76}77 78static int aqr_hwmon_status1(struct phy_device *phydev, int bit, long *value)79{80	int val = aqr_hwmon_test_bit(phydev, VEND1_GENERAL_STAT1, bit);81 82	if (val < 0)83		return val;84 85	*value = val;86 87	return 0;88}89 90static int aqr_hwmon_read(struct device *dev, enum hwmon_sensor_types type,91			  u32 attr, int channel, long *value)92{93	struct phy_device *phydev = dev_get_drvdata(dev);94	int reg;95 96	if (type != hwmon_temp)97		return -EOPNOTSUPP;98 99	switch (attr) {100	case hwmon_temp_input:101		reg = aqr_hwmon_test_bit(phydev, VEND1_THERMAL_STAT2,102					 VEND1_THERMAL_STAT2_VALID);103		if (reg < 0)104			return reg;105		if (!reg)106			return -EBUSY;107 108		return aqr_hwmon_get(phydev, VEND1_THERMAL_STAT1, value);109 110	case hwmon_temp_lcrit:111		return aqr_hwmon_get(phydev, VEND1_THERMAL_PROV_LOW_TEMP_FAIL,112				     value);113	case hwmon_temp_min:114		return aqr_hwmon_get(phydev, VEND1_THERMAL_PROV_LOW_TEMP_WARN,115				     value);116	case hwmon_temp_max:117		return aqr_hwmon_get(phydev, VEND1_THERMAL_PROV_HIGH_TEMP_WARN,118				     value);119	case hwmon_temp_crit:120		return aqr_hwmon_get(phydev, VEND1_THERMAL_PROV_HIGH_TEMP_FAIL,121				     value);122	case hwmon_temp_lcrit_alarm:123		return aqr_hwmon_status1(phydev,124					 VEND1_GENERAL_STAT1_LOW_TEMP_FAIL,125					 value);126	case hwmon_temp_min_alarm:127		return aqr_hwmon_status1(phydev,128					 VEND1_GENERAL_STAT1_LOW_TEMP_WARN,129					 value);130	case hwmon_temp_max_alarm:131		return aqr_hwmon_status1(phydev,132					 VEND1_GENERAL_STAT1_HIGH_TEMP_WARN,133					 value);134	case hwmon_temp_crit_alarm:135		return aqr_hwmon_status1(phydev,136					 VEND1_GENERAL_STAT1_HIGH_TEMP_FAIL,137					 value);138	default:139		return -EOPNOTSUPP;140	}141}142 143static int aqr_hwmon_write(struct device *dev, enum hwmon_sensor_types type,144			   u32 attr, int channel, long value)145{146	struct phy_device *phydev = dev_get_drvdata(dev);147 148	if (type != hwmon_temp)149		return -EOPNOTSUPP;150 151	switch (attr) {152	case hwmon_temp_lcrit:153		return aqr_hwmon_set(phydev, VEND1_THERMAL_PROV_LOW_TEMP_FAIL,154				     value);155	case hwmon_temp_min:156		return aqr_hwmon_set(phydev, VEND1_THERMAL_PROV_LOW_TEMP_WARN,157				     value);158	case hwmon_temp_max:159		return aqr_hwmon_set(phydev, VEND1_THERMAL_PROV_HIGH_TEMP_WARN,160				     value);161	case hwmon_temp_crit:162		return aqr_hwmon_set(phydev, VEND1_THERMAL_PROV_HIGH_TEMP_FAIL,163				     value);164	default:165		return -EOPNOTSUPP;166	}167}168 169static const struct hwmon_ops aqr_hwmon_ops = {170	.is_visible = aqr_hwmon_is_visible,171	.read = aqr_hwmon_read,172	.write = aqr_hwmon_write,173};174 175static u32 aqr_hwmon_chip_config[] = {176	HWMON_C_REGISTER_TZ,177	0,178};179 180static const struct hwmon_channel_info aqr_hwmon_chip = {181	.type = hwmon_chip,182	.config = aqr_hwmon_chip_config,183};184 185static u32 aqr_hwmon_temp_config[] = {186	HWMON_T_INPUT |187	HWMON_T_MAX | HWMON_T_MIN |188	HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM |189	HWMON_T_CRIT | HWMON_T_LCRIT |190	HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM,191	0,192};193 194static const struct hwmon_channel_info aqr_hwmon_temp = {195	.type = hwmon_temp,196	.config = aqr_hwmon_temp_config,197};198 199static const struct hwmon_channel_info * const aqr_hwmon_info[] = {200	&aqr_hwmon_chip,201	&aqr_hwmon_temp,202	NULL,203};204 205static const struct hwmon_chip_info aqr_hwmon_chip_info = {206	.ops = &aqr_hwmon_ops,207	.info = aqr_hwmon_info,208};209 210int aqr_hwmon_probe(struct phy_device *phydev)211{212	struct device *dev = &phydev->mdio.dev;213	struct device *hwmon_dev;214	char *hwmon_name;215	int i, j;216 217	hwmon_name = devm_kstrdup(dev, dev_name(dev), GFP_KERNEL);218	if (!hwmon_name)219		return -ENOMEM;220 221	for (i = j = 0; hwmon_name[i]; i++) {222		if (isalnum(hwmon_name[i])) {223			if (i != j)224				hwmon_name[j] = hwmon_name[i];225			j++;226		}227	}228	hwmon_name[j] = '\0';229 230	hwmon_dev = devm_hwmon_device_register_with_info(dev, hwmon_name,231					phydev, &aqr_hwmon_chip_info, NULL);232 233	return PTR_ERR_OR_ZERO(hwmon_dev);234}235 236#endif237