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alistair23-linux/drivers/hwmon/sch5636.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details you
  should have received a copy of the gnu general public license along
  with this program if not write to the free software foundation inc
  59 temple place suite 330 boston ma 02111 1307 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

522 lines
15 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
* Copyright (C) 2011-2012 Hans de Goede <hdegoede@redhat.com> *
* *
***************************************************************************/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include "sch56xx-common.h"
#define DRVNAME "sch5636"
#define DEVNAME "theseus" /* We only support one model for now */
#define SCH5636_REG_FUJITSU_ID 0x780
#define SCH5636_REG_FUJITSU_REV 0x783
#define SCH5636_NO_INS 5
#define SCH5636_NO_TEMPS 16
#define SCH5636_NO_FANS 8
static const u16 SCH5636_REG_IN_VAL[SCH5636_NO_INS] = {
0x22, 0x23, 0x24, 0x25, 0x189 };
static const u16 SCH5636_REG_IN_FACTORS[SCH5636_NO_INS] = {
4400, 1500, 4000, 4400, 16000 };
static const char * const SCH5636_IN_LABELS[SCH5636_NO_INS] = {
"3.3V", "VREF", "VBAT", "3.3AUX", "12V" };
static const u16 SCH5636_REG_TEMP_VAL[SCH5636_NO_TEMPS] = {
0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181,
0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C };
#define SCH5636_REG_TEMP_CTRL(i) (0x790 + (i))
#define SCH5636_TEMP_WORKING 0x01
#define SCH5636_TEMP_ALARM 0x02
#define SCH5636_TEMP_DEACTIVATED 0x80
static const u16 SCH5636_REG_FAN_VAL[SCH5636_NO_FANS] = {
0x2C, 0x2E, 0x30, 0x32, 0x62, 0x64, 0x66, 0x68 };
#define SCH5636_REG_FAN_CTRL(i) (0x880 + (i))
/* FAULT in datasheet, but acts as an alarm */
#define SCH5636_FAN_ALARM 0x04
#define SCH5636_FAN_NOT_PRESENT 0x08
#define SCH5636_FAN_DEACTIVATED 0x80
struct sch5636_data {
unsigned short addr;
struct device *hwmon_dev;
struct sch56xx_watchdog_data *watchdog;
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
u8 in[SCH5636_NO_INS];
u8 temp_val[SCH5636_NO_TEMPS];
u8 temp_ctrl[SCH5636_NO_TEMPS];
u16 fan_val[SCH5636_NO_FANS];
u8 fan_ctrl[SCH5636_NO_FANS];
};
static struct sch5636_data *sch5636_update_device(struct device *dev)
{
struct sch5636_data *data = dev_get_drvdata(dev);
struct sch5636_data *ret = data;
int i, val;
mutex_lock(&data->update_lock);
/* Cache the values for 1 second */
if (data->valid && !time_after(jiffies, data->last_updated + HZ))
goto abort;
for (i = 0; i < SCH5636_NO_INS; i++) {
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_IN_VAL[i]);
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->in[i] = val;
}
for (i = 0; i < SCH5636_NO_TEMPS; i++) {
if (data->temp_ctrl[i] & SCH5636_TEMP_DEACTIVATED)
continue;
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_TEMP_VAL[i]);
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->temp_val[i] = val;
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_TEMP_CTRL(i));
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->temp_ctrl[i] = val;
/* Alarms need to be explicitly write-cleared */
if (val & SCH5636_TEMP_ALARM) {
sch56xx_write_virtual_reg(data->addr,
SCH5636_REG_TEMP_CTRL(i), val);
}
}
for (i = 0; i < SCH5636_NO_FANS; i++) {
if (data->fan_ctrl[i] & SCH5636_FAN_DEACTIVATED)
continue;
val = sch56xx_read_virtual_reg16(data->addr,
SCH5636_REG_FAN_VAL[i]);
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->fan_val[i] = val;
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_FAN_CTRL(i));
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->fan_ctrl[i] = val;
/* Alarms need to be explicitly write-cleared */
if (val & SCH5636_FAN_ALARM) {
sch56xx_write_virtual_reg(data->addr,
SCH5636_REG_FAN_CTRL(i), val);
}
}
data->last_updated = jiffies;
data->valid = 1;
abort:
mutex_unlock(&data->update_lock);
return ret;
}
static int reg_to_rpm(u16 reg)
{
if (reg == 0)
return -EIO;
if (reg == 0xffff)
return 0;
return 5400540 / reg;
}
static ssize_t name_show(struct device *dev, struct device_attribute *devattr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
}
static ssize_t in_value_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = DIV_ROUND_CLOSEST(
data->in[attr->index] * SCH5636_REG_IN_FACTORS[attr->index],
255);
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t in_label_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
return snprintf(buf, PAGE_SIZE, "%s\n",
SCH5636_IN_LABELS[attr->index]);
}
static ssize_t temp_value_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = (data->temp_val[attr->index] - 64) * 1000;
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t temp_fault_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_WORKING) ? 0 : 1;
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t temp_alarm_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_ALARM) ? 1 : 0;
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t fan_value_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = reg_to_rpm(data->fan_val[attr->index]);
if (val < 0)
return val;
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t fan_fault_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = (data->fan_ctrl[attr->index] & SCH5636_FAN_NOT_PRESENT) ? 1 : 0;
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t fan_alarm_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5636_data *data = sch5636_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = (data->fan_ctrl[attr->index] & SCH5636_FAN_ALARM) ? 1 : 0;
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static struct sensor_device_attribute sch5636_attr[] = {
SENSOR_ATTR_RO(name, name, 0),
SENSOR_ATTR_RO(in0_input, in_value, 0),
SENSOR_ATTR_RO(in0_label, in_label, 0),
SENSOR_ATTR_RO(in1_input, in_value, 1),
SENSOR_ATTR_RO(in1_label, in_label, 1),
SENSOR_ATTR_RO(in2_input, in_value, 2),
SENSOR_ATTR_RO(in2_label, in_label, 2),
SENSOR_ATTR_RO(in3_input, in_value, 3),
SENSOR_ATTR_RO(in3_label, in_label, 3),
SENSOR_ATTR_RO(in4_input, in_value, 4),
SENSOR_ATTR_RO(in4_label, in_label, 4),
};
static struct sensor_device_attribute sch5636_temp_attr[] = {
SENSOR_ATTR_RO(temp1_input, temp_value, 0),
SENSOR_ATTR_RO(temp1_fault, temp_fault, 0),
SENSOR_ATTR_RO(temp1_alarm, temp_alarm, 0),
SENSOR_ATTR_RO(temp2_input, temp_value, 1),
SENSOR_ATTR_RO(temp2_fault, temp_fault, 1),
SENSOR_ATTR_RO(temp2_alarm, temp_alarm, 1),
SENSOR_ATTR_RO(temp3_input, temp_value, 2),
SENSOR_ATTR_RO(temp3_fault, temp_fault, 2),
SENSOR_ATTR_RO(temp3_alarm, temp_alarm, 2),
SENSOR_ATTR_RO(temp4_input, temp_value, 3),
SENSOR_ATTR_RO(temp4_fault, temp_fault, 3),
SENSOR_ATTR_RO(temp4_alarm, temp_alarm, 3),
SENSOR_ATTR_RO(temp5_input, temp_value, 4),
SENSOR_ATTR_RO(temp5_fault, temp_fault, 4),
SENSOR_ATTR_RO(temp5_alarm, temp_alarm, 4),
SENSOR_ATTR_RO(temp6_input, temp_value, 5),
SENSOR_ATTR_RO(temp6_fault, temp_fault, 5),
SENSOR_ATTR_RO(temp6_alarm, temp_alarm, 5),
SENSOR_ATTR_RO(temp7_input, temp_value, 6),
SENSOR_ATTR_RO(temp7_fault, temp_fault, 6),
SENSOR_ATTR_RO(temp7_alarm, temp_alarm, 6),
SENSOR_ATTR_RO(temp8_input, temp_value, 7),
SENSOR_ATTR_RO(temp8_fault, temp_fault, 7),
SENSOR_ATTR_RO(temp8_alarm, temp_alarm, 7),
SENSOR_ATTR_RO(temp9_input, temp_value, 8),
SENSOR_ATTR_RO(temp9_fault, temp_fault, 8),
SENSOR_ATTR_RO(temp9_alarm, temp_alarm, 8),
SENSOR_ATTR_RO(temp10_input, temp_value, 9),
SENSOR_ATTR_RO(temp10_fault, temp_fault, 9),
SENSOR_ATTR_RO(temp10_alarm, temp_alarm, 9),
SENSOR_ATTR_RO(temp11_input, temp_value, 10),
SENSOR_ATTR_RO(temp11_fault, temp_fault, 10),
SENSOR_ATTR_RO(temp11_alarm, temp_alarm, 10),
SENSOR_ATTR_RO(temp12_input, temp_value, 11),
SENSOR_ATTR_RO(temp12_fault, temp_fault, 11),
SENSOR_ATTR_RO(temp12_alarm, temp_alarm, 11),
SENSOR_ATTR_RO(temp13_input, temp_value, 12),
SENSOR_ATTR_RO(temp13_fault, temp_fault, 12),
SENSOR_ATTR_RO(temp13_alarm, temp_alarm, 12),
SENSOR_ATTR_RO(temp14_input, temp_value, 13),
SENSOR_ATTR_RO(temp14_fault, temp_fault, 13),
SENSOR_ATTR_RO(temp14_alarm, temp_alarm, 13),
SENSOR_ATTR_RO(temp15_input, temp_value, 14),
SENSOR_ATTR_RO(temp15_fault, temp_fault, 14),
SENSOR_ATTR_RO(temp15_alarm, temp_alarm, 14),
SENSOR_ATTR_RO(temp16_input, temp_value, 15),
SENSOR_ATTR_RO(temp16_fault, temp_fault, 15),
SENSOR_ATTR_RO(temp16_alarm, temp_alarm, 15),
};
static struct sensor_device_attribute sch5636_fan_attr[] = {
SENSOR_ATTR_RO(fan1_input, fan_value, 0),
SENSOR_ATTR_RO(fan1_fault, fan_fault, 0),
SENSOR_ATTR_RO(fan1_alarm, fan_alarm, 0),
SENSOR_ATTR_RO(fan2_input, fan_value, 1),
SENSOR_ATTR_RO(fan2_fault, fan_fault, 1),
SENSOR_ATTR_RO(fan2_alarm, fan_alarm, 1),
SENSOR_ATTR_RO(fan3_input, fan_value, 2),
SENSOR_ATTR_RO(fan3_fault, fan_fault, 2),
SENSOR_ATTR_RO(fan3_alarm, fan_alarm, 2),
SENSOR_ATTR_RO(fan4_input, fan_value, 3),
SENSOR_ATTR_RO(fan4_fault, fan_fault, 3),
SENSOR_ATTR_RO(fan4_alarm, fan_alarm, 3),
SENSOR_ATTR_RO(fan5_input, fan_value, 4),
SENSOR_ATTR_RO(fan5_fault, fan_fault, 4),
SENSOR_ATTR_RO(fan5_alarm, fan_alarm, 4),
SENSOR_ATTR_RO(fan6_input, fan_value, 5),
SENSOR_ATTR_RO(fan6_fault, fan_fault, 5),
SENSOR_ATTR_RO(fan6_alarm, fan_alarm, 5),
SENSOR_ATTR_RO(fan7_input, fan_value, 6),
SENSOR_ATTR_RO(fan7_fault, fan_fault, 6),
SENSOR_ATTR_RO(fan7_alarm, fan_alarm, 6),
SENSOR_ATTR_RO(fan8_input, fan_value, 7),
SENSOR_ATTR_RO(fan8_fault, fan_fault, 7),
SENSOR_ATTR_RO(fan8_alarm, fan_alarm, 7),
};
static int sch5636_remove(struct platform_device *pdev)
{
struct sch5636_data *data = platform_get_drvdata(pdev);
int i;
if (data->watchdog)
sch56xx_watchdog_unregister(data->watchdog);
if (data->hwmon_dev)
hwmon_device_unregister(data->hwmon_dev);
for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++)
device_remove_file(&pdev->dev, &sch5636_attr[i].dev_attr);
for (i = 0; i < SCH5636_NO_TEMPS * 3; i++)
device_remove_file(&pdev->dev,
&sch5636_temp_attr[i].dev_attr);
for (i = 0; i < SCH5636_NO_FANS * 3; i++)
device_remove_file(&pdev->dev,
&sch5636_fan_attr[i].dev_attr);
return 0;
}
static int sch5636_probe(struct platform_device *pdev)
{
struct sch5636_data *data;
int i, err, val, revision[2];
char id[4];
data = devm_kzalloc(&pdev->dev, sizeof(struct sch5636_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);
for (i = 0; i < 3; i++) {
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_FUJITSU_ID + i);
if (val < 0) {
pr_err("Could not read Fujitsu id byte at %#x\n",
SCH5636_REG_FUJITSU_ID + i);
err = val;
goto error;
}
id[i] = val;
}
id[i] = '\0';
if (strcmp(id, "THS")) {
pr_err("Unknown Fujitsu id: %02x%02x%02x\n",
id[0], id[1], id[2]);
err = -ENODEV;
goto error;
}
for (i = 0; i < 2; i++) {
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_FUJITSU_REV + i);
if (val < 0) {
err = val;
goto error;
}
revision[i] = val;
}
pr_info("Found %s chip at %#hx, revision: %d.%02d\n", DEVNAME,
data->addr, revision[0], revision[1]);
/* Read all temp + fan ctrl registers to determine which are active */
for (i = 0; i < SCH5636_NO_TEMPS; i++) {
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_TEMP_CTRL(i));
if (unlikely(val < 0)) {
err = val;
goto error;
}
data->temp_ctrl[i] = val;
}
for (i = 0; i < SCH5636_NO_FANS; i++) {
val = sch56xx_read_virtual_reg(data->addr,
SCH5636_REG_FAN_CTRL(i));
if (unlikely(val < 0)) {
err = val;
goto error;
}
data->fan_ctrl[i] = val;
}
for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) {
err = device_create_file(&pdev->dev,
&sch5636_attr[i].dev_attr);
if (err)
goto error;
}
for (i = 0; i < (SCH5636_NO_TEMPS * 3); i++) {
if (data->temp_ctrl[i/3] & SCH5636_TEMP_DEACTIVATED)
continue;
err = device_create_file(&pdev->dev,
&sch5636_temp_attr[i].dev_attr);
if (err)
goto error;
}
for (i = 0; i < (SCH5636_NO_FANS * 3); i++) {
if (data->fan_ctrl[i/3] & SCH5636_FAN_DEACTIVATED)
continue;
err = device_create_file(&pdev->dev,
&sch5636_fan_attr[i].dev_attr);
if (err)
goto error;
}
data->hwmon_dev = hwmon_device_register(&pdev->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
data->hwmon_dev = NULL;
goto error;
}
/* Note failing to register the watchdog is not a fatal error */
data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr,
(revision[0] << 8) | revision[1],
&data->update_lock, 0);
return 0;
error:
sch5636_remove(pdev);
return err;
}
static struct platform_driver sch5636_driver = {
.driver = {
.name = DRVNAME,
},
.probe = sch5636_probe,
.remove = sch5636_remove,
};
module_platform_driver(sch5636_driver);
MODULE_DESCRIPTION("SMSC SCH5636 Hardware Monitoring Driver");
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_LICENSE("GPL");
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