542 lines
13 KiB
C
542 lines
13 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/***************************************************************************
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* Copyright (C) 2010-2012 Hans de Goede <hdegoede@redhat.com> *
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* *
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***************************************************************************/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/platform_device.h>
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#include <linux/hwmon.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include "sch56xx-common.h"
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#define DRVNAME "sch5627"
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#define DEVNAME DRVNAME /* We only support one model */
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#define SCH5627_HWMON_ID 0xa5
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#define SCH5627_COMPANY_ID 0x5c
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#define SCH5627_PRIMARY_ID 0xa0
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#define SCH5627_REG_BUILD_CODE 0x39
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#define SCH5627_REG_BUILD_ID 0x3a
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#define SCH5627_REG_HWMON_ID 0x3c
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#define SCH5627_REG_HWMON_REV 0x3d
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#define SCH5627_REG_COMPANY_ID 0x3e
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#define SCH5627_REG_PRIMARY_ID 0x3f
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#define SCH5627_REG_CTRL 0x40
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#define SCH5627_NO_TEMPS 8
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#define SCH5627_NO_FANS 4
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#define SCH5627_NO_IN 5
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static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
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0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
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static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
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0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
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static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
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0, 0, 1, 1, 0, 0, 0, 1 };
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static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
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0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
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static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
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0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
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static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
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0x2C, 0x2E, 0x30, 0x32 };
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static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
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0x62, 0x64, 0x66, 0x68 };
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static const u16 SCH5627_REG_PWM_MAP[SCH5627_NO_FANS] = {
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0xA0, 0xA1, 0xA2, 0xA3 };
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static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
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0x22, 0x23, 0x24, 0x25, 0x189 };
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static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
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0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
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static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
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1, 0, 1, 0, 1 };
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static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
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10745, 3660, 9765, 10745, 3660 };
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static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
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"VCC", "VTT", "VBAT", "VTR", "V_IN" };
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struct sch5627_data {
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unsigned short addr;
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u8 control;
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u8 temp_max[SCH5627_NO_TEMPS];
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u8 temp_crit[SCH5627_NO_TEMPS];
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u16 fan_min[SCH5627_NO_FANS];
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struct mutex update_lock;
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unsigned long last_battery; /* In jiffies */
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char temp_valid; /* !=0 if following fields are valid */
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char fan_valid;
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char in_valid;
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unsigned long temp_last_updated; /* In jiffies */
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unsigned long fan_last_updated;
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unsigned long in_last_updated;
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u16 temp[SCH5627_NO_TEMPS];
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u16 fan[SCH5627_NO_FANS];
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u16 in[SCH5627_NO_IN];
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};
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static int sch5627_update_temp(struct sch5627_data *data)
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{
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int ret = 0;
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int i, val;
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mutex_lock(&data->update_lock);
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/* Cache the values for 1 second */
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if (time_after(jiffies, data->temp_last_updated + HZ) || !data->temp_valid) {
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for (i = 0; i < SCH5627_NO_TEMPS; i++) {
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val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_TEMP_MSB[i],
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SCH5627_REG_TEMP_LSN[i],
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SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
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if (unlikely(val < 0)) {
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ret = val;
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goto abort;
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}
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data->temp[i] = val;
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}
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data->temp_last_updated = jiffies;
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data->temp_valid = 1;
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}
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abort:
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mutex_unlock(&data->update_lock);
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return ret;
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}
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static int sch5627_update_fan(struct sch5627_data *data)
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{
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int ret = 0;
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int i, val;
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mutex_lock(&data->update_lock);
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/* Cache the values for 1 second */
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if (time_after(jiffies, data->fan_last_updated + HZ) || !data->fan_valid) {
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for (i = 0; i < SCH5627_NO_FANS; i++) {
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val = sch56xx_read_virtual_reg16(data->addr, SCH5627_REG_FAN[i]);
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if (unlikely(val < 0)) {
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ret = val;
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goto abort;
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}
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data->fan[i] = val;
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}
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data->fan_last_updated = jiffies;
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data->fan_valid = 1;
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}
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abort:
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mutex_unlock(&data->update_lock);
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return ret;
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}
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static int sch5627_update_in(struct sch5627_data *data)
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{
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int ret = 0;
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int i, val;
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mutex_lock(&data->update_lock);
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/* Trigger a Vbat voltage measurement every 5 minutes */
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if (time_after(jiffies, data->last_battery + 300 * HZ)) {
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sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, data->control | 0x10);
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data->last_battery = jiffies;
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}
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/* Cache the values for 1 second */
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if (time_after(jiffies, data->in_last_updated + HZ) || !data->in_valid) {
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for (i = 0; i < SCH5627_NO_IN; i++) {
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val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_IN_MSB[i],
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SCH5627_REG_IN_LSN[i],
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SCH5627_REG_IN_HIGH_NIBBLE[i]);
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if (unlikely(val < 0)) {
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ret = val;
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goto abort;
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}
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data->in[i] = val;
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}
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data->in_last_updated = jiffies;
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data->in_valid = 1;
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}
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abort:
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mutex_unlock(&data->update_lock);
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return ret;
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}
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static int sch5627_read_limits(struct sch5627_data *data)
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{
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int i, val;
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for (i = 0; i < SCH5627_NO_TEMPS; i++) {
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/*
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* Note what SMSC calls ABS, is what lm_sensors calls max
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* (aka high), and HIGH is what lm_sensors calls crit.
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*/
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val = sch56xx_read_virtual_reg(data->addr,
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SCH5627_REG_TEMP_ABS[i]);
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if (val < 0)
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return val;
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data->temp_max[i] = val;
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val = sch56xx_read_virtual_reg(data->addr,
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SCH5627_REG_TEMP_HIGH[i]);
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if (val < 0)
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return val;
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data->temp_crit[i] = val;
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}
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for (i = 0; i < SCH5627_NO_FANS; i++) {
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val = sch56xx_read_virtual_reg16(data->addr,
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SCH5627_REG_FAN_MIN[i]);
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if (val < 0)
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return val;
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data->fan_min[i] = val;
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}
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return 0;
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}
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static int reg_to_temp(u16 reg)
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{
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return (reg * 625) / 10 - 64000;
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}
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static int reg_to_temp_limit(u8 reg)
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{
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return (reg - 64) * 1000;
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}
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static int reg_to_rpm(u16 reg)
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{
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if (reg == 0)
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return -EIO;
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if (reg == 0xffff)
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return 0;
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return 5400540 / reg;
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}
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static umode_t sch5627_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr,
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int channel)
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{
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if (type == hwmon_pwm && attr == hwmon_pwm_auto_channels_temp)
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return 0644;
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return 0444;
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}
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static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
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long *val)
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{
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struct sch5627_data *data = dev_get_drvdata(dev);
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int ret;
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switch (type) {
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case hwmon_temp:
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ret = sch5627_update_temp(data);
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if (ret < 0)
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return ret;
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switch (attr) {
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case hwmon_temp_input:
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*val = reg_to_temp(data->temp[channel]);
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return 0;
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case hwmon_temp_max:
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*val = reg_to_temp_limit(data->temp_max[channel]);
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return 0;
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case hwmon_temp_crit:
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*val = reg_to_temp_limit(data->temp_crit[channel]);
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return 0;
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case hwmon_temp_fault:
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*val = (data->temp[channel] == 0);
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return 0;
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default:
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break;
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}
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break;
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case hwmon_fan:
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ret = sch5627_update_fan(data);
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if (ret < 0)
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return ret;
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switch (attr) {
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case hwmon_fan_input:
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ret = reg_to_rpm(data->fan[channel]);
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if (ret < 0)
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return ret;
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*val = ret;
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return 0;
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case hwmon_fan_min:
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ret = reg_to_rpm(data->fan_min[channel]);
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if (ret < 0)
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return ret;
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*val = ret;
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return 0;
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case hwmon_fan_fault:
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*val = (data->fan[channel] == 0xffff);
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return 0;
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default:
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break;
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}
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break;
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case hwmon_pwm:
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switch (attr) {
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case hwmon_pwm_auto_channels_temp:
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mutex_lock(&data->update_lock);
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ret = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PWM_MAP[channel]);
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mutex_unlock(&data->update_lock);
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if (ret < 0)
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return ret;
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*val = ret;
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return 0;
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default:
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break;
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}
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break;
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case hwmon_in:
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ret = sch5627_update_in(data);
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if (ret < 0)
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return ret;
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switch (attr) {
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case hwmon_in_input:
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*val = DIV_ROUND_CLOSEST(data->in[channel] * SCH5627_REG_IN_FACTOR[channel],
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10000);
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return 0;
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default:
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break;
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}
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break;
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default:
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break;
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}
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return -EOPNOTSUPP;
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}
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static int sch5627_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
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int channel, const char **str)
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{
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switch (type) {
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case hwmon_in:
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switch (attr) {
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case hwmon_in_label:
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*str = SCH5627_IN_LABELS[channel];
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return 0;
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default:
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break;
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}
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break;
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default:
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break;
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}
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return -EOPNOTSUPP;
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}
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static int sch5627_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
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long val)
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{
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struct sch5627_data *data = dev_get_drvdata(dev);
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int ret;
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switch (type) {
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case hwmon_pwm:
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switch (attr) {
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case hwmon_pwm_auto_channels_temp:
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/* registers are 8 bit wide */
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if (val > U8_MAX || val < 0)
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return -EINVAL;
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mutex_lock(&data->update_lock);
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ret = sch56xx_write_virtual_reg(data->addr, SCH5627_REG_PWM_MAP[channel],
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val);
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mutex_unlock(&data->update_lock);
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return ret;
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default:
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break;
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}
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||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct hwmon_ops sch5627_ops = {
|
||
|
|
.is_visible = sch5627_is_visible,
|
||
|
|
.read = sch5627_read,
|
||
|
|
.read_string = sch5627_read_string,
|
||
|
|
.write = sch5627_write,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct hwmon_channel_info *sch5627_info[] = {
|
||
|
|
HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ),
|
||
|
|
HWMON_CHANNEL_INFO(temp,
|
||
|
|
HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
|
||
|
|
HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
|
||
|
|
HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
|
||
|
|
HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
|
||
|
|
HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
|
||
|
|
HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
|
||
|
|
HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
|
||
|
|
HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT
|
||
|
|
),
|
||
|
|
HWMON_CHANNEL_INFO(fan,
|
||
|
|
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
|
||
|
|
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
|
||
|
|
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
|
||
|
|
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT
|
||
|
|
),
|
||
|
|
HWMON_CHANNEL_INFO(pwm,
|
||
|
|
HWMON_PWM_AUTO_CHANNELS_TEMP,
|
||
|
|
HWMON_PWM_AUTO_CHANNELS_TEMP,
|
||
|
|
HWMON_PWM_AUTO_CHANNELS_TEMP,
|
||
|
|
HWMON_PWM_AUTO_CHANNELS_TEMP
|
||
|
|
),
|
||
|
|
HWMON_CHANNEL_INFO(in,
|
||
|
|
HWMON_I_INPUT | HWMON_I_LABEL,
|
||
|
|
HWMON_I_INPUT | HWMON_I_LABEL,
|
||
|
|
HWMON_I_INPUT | HWMON_I_LABEL,
|
||
|
|
HWMON_I_INPUT | HWMON_I_LABEL,
|
||
|
|
HWMON_I_INPUT
|
||
|
|
),
|
||
|
|
NULL
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct hwmon_chip_info sch5627_chip_info = {
|
||
|
|
.ops = &sch5627_ops,
|
||
|
|
.info = sch5627_info,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int sch5627_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct sch5627_data *data;
|
||
|
|
struct device *hwmon_dev;
|
||
|
|
int err, build_code, build_id, hwmon_rev, val;
|
||
|
|
|
||
|
|
data = devm_kzalloc(&pdev->dev, sizeof(struct sch5627_data),
|
||
|
|
GFP_KERNEL);
|
||
|
|
if (!data)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
|
||
|
|
mutex_init(&data->update_lock);
|
||
|
|
platform_set_drvdata(pdev, data);
|
||
|
|
|
||
|
|
val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
|
||
|
|
if (val < 0)
|
||
|
|
return val;
|
||
|
|
|
||
|
|
if (val != SCH5627_HWMON_ID) {
|
||
|
|
pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
|
||
|
|
val, SCH5627_HWMON_ID);
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
|
||
|
|
if (val < 0)
|
||
|
|
return val;
|
||
|
|
|
||
|
|
if (val != SCH5627_COMPANY_ID) {
|
||
|
|
pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
|
||
|
|
val, SCH5627_COMPANY_ID);
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
|
||
|
|
if (val < 0)
|
||
|
|
return val;
|
||
|
|
|
||
|
|
if (val != SCH5627_PRIMARY_ID) {
|
||
|
|
pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
|
||
|
|
val, SCH5627_PRIMARY_ID);
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
build_code = sch56xx_read_virtual_reg(data->addr,
|
||
|
|
SCH5627_REG_BUILD_CODE);
|
||
|
|
if (build_code < 0)
|
||
|
|
return build_code;
|
||
|
|
|
||
|
|
build_id = sch56xx_read_virtual_reg16(data->addr,
|
||
|
|
SCH5627_REG_BUILD_ID);
|
||
|
|
if (build_id < 0)
|
||
|
|
return build_id;
|
||
|
|
|
||
|
|
hwmon_rev = sch56xx_read_virtual_reg(data->addr,
|
||
|
|
SCH5627_REG_HWMON_REV);
|
||
|
|
if (hwmon_rev < 0)
|
||
|
|
return hwmon_rev;
|
||
|
|
|
||
|
|
val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
|
||
|
|
if (val < 0)
|
||
|
|
return val;
|
||
|
|
|
||
|
|
data->control = val;
|
||
|
|
if (!(data->control & 0x01)) {
|
||
|
|
pr_err("hardware monitoring not enabled\n");
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
/* Trigger a Vbat voltage measurement, so that we get a valid reading
|
||
|
|
the first time we read Vbat */
|
||
|
|
sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
|
||
|
|
data->control | 0x10);
|
||
|
|
data->last_battery = jiffies;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Read limits, we do this only once as reading a register on
|
||
|
|
* the sch5627 is quite expensive (and they don't change).
|
||
|
|
*/
|
||
|
|
err = sch5627_read_limits(data);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
|
||
|
|
pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
|
||
|
|
build_code, build_id, hwmon_rev);
|
||
|
|
|
||
|
|
hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, DEVNAME, data,
|
||
|
|
&sch5627_chip_info, NULL);
|
||
|
|
if (IS_ERR(hwmon_dev))
|
||
|
|
return PTR_ERR(hwmon_dev);
|
||
|
|
|
||
|
|
/* Note failing to register the watchdog is not a fatal error */
|
||
|
|
sch56xx_watchdog_register(&pdev->dev, data->addr,
|
||
|
|
(build_code << 24) | (build_id << 8) | hwmon_rev,
|
||
|
|
&data->update_lock, 1);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct platform_device_id sch5627_device_id[] = {
|
||
|
|
{
|
||
|
|
.name = "sch5627",
|
||
|
|
},
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(platform, sch5627_device_id);
|
||
|
|
|
||
|
|
static struct platform_driver sch5627_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = DRVNAME,
|
||
|
|
},
|
||
|
|
.probe = sch5627_probe,
|
||
|
|
.id_table = sch5627_device_id,
|
||
|
|
};
|
||
|
|
|
||
|
|
module_platform_driver(sch5627_driver);
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
|
||
|
|
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
|
||
|
|
MODULE_LICENSE("GPL");
|