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linux/drivers/hwmon/gl520sm.c
Thomas Gleixner 74ba9207e1 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 
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
  675 mass ave cambridge ma 02139 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 441 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-24 17:36:45 +02:00

912 lines
25 KiB
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
* monitoring
* Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>,
* Kyösti Mälkki <kmalkki@cc.hut.fi>
* Copyright (c) 2005 Maarten Deprez <maartendeprez@users.sourceforge.net>
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
/* Type of the extra sensor */
static unsigned short extra_sensor_type;
module_param(extra_sensor_type, ushort, 0);
MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
/*
* Many GL520 constants specified below
* One of the inputs can be configured as either temp or voltage.
* That's why _TEMP2 and _IN4 access the same register
*/
/* The GL520 registers */
#define GL520_REG_CHIP_ID 0x00
#define GL520_REG_REVISION 0x01
#define GL520_REG_CONF 0x03
#define GL520_REG_MASK 0x11
#define GL520_REG_VID_INPUT 0x02
static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b };
static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e };
static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 };
static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 };
#define GL520_REG_FAN_INPUT 0x07
#define GL520_REG_FAN_MIN 0x08
#define GL520_REG_FAN_DIV 0x0f
#define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
#define GL520_REG_ALARMS 0x12
#define GL520_REG_BEEP_MASK 0x10
#define GL520_REG_BEEP_ENABLE GL520_REG_CONF
/* Client data */
struct gl520_data {
struct i2c_client *client;
const struct attribute_group *groups[3];
struct mutex update_lock;
char valid; /* zero until the following fields are valid */
unsigned long last_updated; /* in jiffies */
u8 vid;
u8 vrm;
u8 in_input[5]; /* [0] = VVD */
u8 in_min[5]; /* [0] = VDD */
u8 in_max[5]; /* [0] = VDD */
u8 fan_input[2];
u8 fan_min[2];
u8 fan_div[2];
u8 fan_off;
u8 temp_input[2];
u8 temp_max[2];
u8 temp_max_hyst[2];
u8 alarms;
u8 beep_enable;
u8 beep_mask;
u8 alarm_mask;
u8 two_temps;
};
/*
* Registers 0x07 to 0x0c are word-sized, others are byte-sized
* GL520 uses a high-byte first convention
*/
static int gl520_read_value(struct i2c_client *client, u8 reg)
{
if ((reg >= 0x07) && (reg <= 0x0c))
return i2c_smbus_read_word_swapped(client, reg);
else
return i2c_smbus_read_byte_data(client, reg);
}
static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
{
if ((reg >= 0x07) && (reg <= 0x0c))
return i2c_smbus_write_word_swapped(client, reg, value);
else
return i2c_smbus_write_byte_data(client, reg, value);
}
static struct gl520_data *gl520_update_device(struct device *dev)
{
struct gl520_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int val, i;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
dev_dbg(&client->dev, "Starting gl520sm update\n");
data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
data->vid = gl520_read_value(client,
GL520_REG_VID_INPUT) & 0x1f;
for (i = 0; i < 4; i++) {
data->in_input[i] = gl520_read_value(client,
GL520_REG_IN_INPUT[i]);
val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
data->in_min[i] = val & 0xff;
data->in_max[i] = (val >> 8) & 0xff;
}
val = gl520_read_value(client, GL520_REG_FAN_INPUT);
data->fan_input[0] = (val >> 8) & 0xff;
data->fan_input[1] = val & 0xff;
val = gl520_read_value(client, GL520_REG_FAN_MIN);
data->fan_min[0] = (val >> 8) & 0xff;
data->fan_min[1] = val & 0xff;
data->temp_input[0] = gl520_read_value(client,
GL520_REG_TEMP_INPUT[0]);
data->temp_max[0] = gl520_read_value(client,
GL520_REG_TEMP_MAX[0]);
data->temp_max_hyst[0] = gl520_read_value(client,
GL520_REG_TEMP_MAX_HYST[0]);
val = gl520_read_value(client, GL520_REG_FAN_DIV);
data->fan_div[0] = (val >> 6) & 0x03;
data->fan_div[1] = (val >> 4) & 0x03;
data->fan_off = (val >> 2) & 0x01;
data->alarms &= data->alarm_mask;
val = gl520_read_value(client, GL520_REG_CONF);
data->beep_enable = !((val >> 2) & 1);
/* Temp1 and Vin4 are the same input */
if (data->two_temps) {
data->temp_input[1] = gl520_read_value(client,
GL520_REG_TEMP_INPUT[1]);
data->temp_max[1] = gl520_read_value(client,
GL520_REG_TEMP_MAX[1]);
data->temp_max_hyst[1] = gl520_read_value(client,
GL520_REG_TEMP_MAX_HYST[1]);
} else {
data->in_input[4] = gl520_read_value(client,
GL520_REG_IN_INPUT[4]);
data->in_min[4] = gl520_read_value(client,
GL520_REG_IN_MIN[4]);
data->in_max[4] = gl520_read_value(client,
GL520_REG_IN_MAX[4]);
}
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
/*
* Sysfs stuff
*/
static ssize_t cpu0_vid_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
}
static DEVICE_ATTR_RO(cpu0_vid);
#define VDD_FROM_REG(val) DIV_ROUND_CLOSEST((val) * 95, 4)
#define VDD_CLAMP(val) clamp_val(val, 0, 255 * 95 / 4)
#define VDD_TO_REG(val) DIV_ROUND_CLOSEST(VDD_CLAMP(val) * 4, 95)
#define IN_FROM_REG(val) ((val) * 19)
#define IN_CLAMP(val) clamp_val(val, 0, 255 * 19)
#define IN_TO_REG(val) DIV_ROUND_CLOSEST(IN_CLAMP(val), 19)
static ssize_t in_input_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
u8 r = data->in_input[n];
if (n == 0)
return sprintf(buf, "%d\n", VDD_FROM_REG(r));
else
return sprintf(buf, "%d\n", IN_FROM_REG(r));
}
static ssize_t in_min_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
u8 r = data->in_min[n];
if (n == 0)
return sprintf(buf, "%d\n", VDD_FROM_REG(r));
else
return sprintf(buf, "%d\n", IN_FROM_REG(r));
}
static ssize_t in_max_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
u8 r = data->in_max[n];
if (n == 0)
return sprintf(buf, "%d\n", VDD_FROM_REG(r));
else
return sprintf(buf, "%d\n", IN_FROM_REG(r));
}
static ssize_t in_min_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct gl520_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int n = to_sensor_dev_attr(attr)->index;
u8 r;
long v;
int err;
err = kstrtol(buf, 10, &v);
if (err)
return err;
mutex_lock(&data->update_lock);
if (n == 0)
r = VDD_TO_REG(v);
else
r = IN_TO_REG(v);
data->in_min[n] = r;
if (n < 4)
gl520_write_value(client, GL520_REG_IN_MIN[n],
(gl520_read_value(client, GL520_REG_IN_MIN[n])
& ~0xff) | r);
else
gl520_write_value(client, GL520_REG_IN_MIN[n], r);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t in_max_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct gl520_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int n = to_sensor_dev_attr(attr)->index;
u8 r;
long v;
int err;
err = kstrtol(buf, 10, &v);
if (err)
return err;
if (n == 0)
r = VDD_TO_REG(v);
else
r = IN_TO_REG(v);
mutex_lock(&data->update_lock);
data->in_max[n] = r;
if (n < 4)
gl520_write_value(client, GL520_REG_IN_MAX[n],
(gl520_read_value(client, GL520_REG_IN_MAX[n])
& ~0xff00) | (r << 8));
else
gl520_write_value(client, GL520_REG_IN_MAX[n], r);
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR_RO(in0_input, in_input, 0);
static SENSOR_DEVICE_ATTR_RO(in1_input, in_input, 1);
static SENSOR_DEVICE_ATTR_RO(in2_input, in_input, 2);
static SENSOR_DEVICE_ATTR_RO(in3_input, in_input, 3);
static SENSOR_DEVICE_ATTR_RO(in4_input, in_input, 4);
static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
#define DIV_FROM_REG(val) (1 << (val))
#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div))))
#define FAN_BASE(div) (480000 >> (div))
#define FAN_CLAMP(val, div) clamp_val(val, FAN_BASE(div) / 255, \
FAN_BASE(div))
#define FAN_TO_REG(val, div) ((val) == 0 ? 0 : \
DIV_ROUND_CLOSEST(480000, \
FAN_CLAMP(val, div) << (div)))
static ssize_t fan_input_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
data->fan_div[n]));
}
static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
data->fan_div[n]));
}
static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
}
static ssize_t fan1_off_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", data->fan_off);
}
static ssize_t fan_min_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct gl520_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int n = to_sensor_dev_attr(attr)->index;
u8 r;
unsigned long v;
int err;
err = kstrtoul(buf, 10, &v);
if (err)
return err;
mutex_lock(&data->update_lock);
r = FAN_TO_REG(v, data->fan_div[n]);
data->fan_min[n] = r;
if (n == 0)
gl520_write_value(client, GL520_REG_FAN_MIN,
(gl520_read_value(client, GL520_REG_FAN_MIN)
& ~0xff00) | (r << 8));
else
gl520_write_value(client, GL520_REG_FAN_MIN,
(gl520_read_value(client, GL520_REG_FAN_MIN)
& ~0xff) | r);
data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
if (data->fan_min[n] == 0)
data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
else
data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
data->beep_mask &= data->alarm_mask;
gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t fan_div_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct gl520_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int n = to_sensor_dev_attr(attr)->index;
u8 r;
unsigned long v;
int err;
err = kstrtoul(buf, 10, &v);
if (err)
return err;
switch (v) {
case 1:
r = 0;
break;
case 2:
r = 1;
break;
case 4:
r = 2;
break;
case 8:
r = 3;
break;
default:
dev_err(&client->dev,
"fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
return -EINVAL;
}
mutex_lock(&data->update_lock);
data->fan_div[n] = r;
if (n == 0)
gl520_write_value(client, GL520_REG_FAN_DIV,
(gl520_read_value(client, GL520_REG_FAN_DIV)
& ~0xc0) | (r << 6));
else
gl520_write_value(client, GL520_REG_FAN_DIV,
(gl520_read_value(client, GL520_REG_FAN_DIV)
& ~0x30) | (r << 4));
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t fan1_off_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct gl520_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
u8 r;
unsigned long v;
int err;
err = kstrtoul(buf, 10, &v);
if (err)
return err;
r = (v ? 1 : 0);
mutex_lock(&data->update_lock);
data->fan_off = r;
gl520_write_value(client, GL520_REG_FAN_OFF,
(gl520_read_value(client, GL520_REG_FAN_OFF)
& ~0x0c) | (r << 2));
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0);
static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1);
static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
static DEVICE_ATTR_RW(fan1_off);
#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
#define TEMP_CLAMP(val) clamp_val(val, -130000, 125000)
#define TEMP_TO_REG(val) (DIV_ROUND_CLOSEST(TEMP_CLAMP(val), 1000) + 130)
static ssize_t temp_input_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
}
static ssize_t temp_max_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
}
static ssize_t temp_max_hyst_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int n = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
}
static ssize_t temp_max_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct gl520_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int n = to_sensor_dev_attr(attr)->index;
long v;
int err;
err = kstrtol(buf, 10, &v);
if (err)
return err;
mutex_lock(&data->update_lock);
data->temp_max[n] = TEMP_TO_REG(v);
gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t temp_max_hyst_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct gl520_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int n = to_sensor_dev_attr(attr)->index;
long v;
int err;
err = kstrtol(buf, 10, &v);
if (err)
return err;
mutex_lock(&data->update_lock);
data->temp_max_hyst[n] = TEMP_TO_REG(v);
gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
data->temp_max_hyst[n]);
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0);
static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1);
static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, temp_max_hyst, 0);
static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_max_hyst, 1);
static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", data->alarms);
}
static ssize_t beep_enable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", data->beep_enable);
}
static ssize_t beep_mask_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", data->beep_mask);
}
static ssize_t beep_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct gl520_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
u8 r;
unsigned long v;
int err;
err = kstrtoul(buf, 10, &v);
if (err)
return err;
r = (v ? 0 : 1);
mutex_lock(&data->update_lock);
data->beep_enable = !r;
gl520_write_value(client, GL520_REG_BEEP_ENABLE,
(gl520_read_value(client, GL520_REG_BEEP_ENABLE)
& ~0x04) | (r << 2));
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t beep_mask_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct gl520_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long r;
int err;
err = kstrtoul(buf, 10, &r);
if (err)
return err;
mutex_lock(&data->update_lock);
r &= data->alarm_mask;
data->beep_mask = r;
gl520_write_value(client, GL520_REG_BEEP_MASK, r);
mutex_unlock(&data->update_lock);
return count;
}
static DEVICE_ATTR_RO(alarms);
static DEVICE_ATTR_RW(beep_enable);
static DEVICE_ATTR_RW(beep_mask);
static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
int bit_nr = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
}
static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 5);
static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 6);
static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 7);
static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 7);
static ssize_t beep_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
int bitnr = to_sensor_dev_attr(attr)->index;
struct gl520_data *data = gl520_update_device(dev);
return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
}
static ssize_t beep_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct gl520_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int bitnr = to_sensor_dev_attr(attr)->index;
unsigned long bit;
int err;
err = kstrtoul(buf, 10, &bit);
if (err)
return err;
if (bit & ~1)
return -EINVAL;
mutex_lock(&data->update_lock);
data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
if (bit)
data->beep_mask |= (1 << bitnr);
else
data->beep_mask &= ~(1 << bitnr);
gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR_RW(in0_beep, beep, 0);
static SENSOR_DEVICE_ATTR_RW(in1_beep, beep, 1);
static SENSOR_DEVICE_ATTR_RW(in2_beep, beep, 2);
static SENSOR_DEVICE_ATTR_RW(in3_beep, beep, 3);
static SENSOR_DEVICE_ATTR_RW(temp1_beep, beep, 4);
static SENSOR_DEVICE_ATTR_RW(fan1_beep, beep, 5);
static SENSOR_DEVICE_ATTR_RW(fan2_beep, beep, 6);
static SENSOR_DEVICE_ATTR_RW(temp2_beep, beep, 7);
static SENSOR_DEVICE_ATTR_RW(in4_beep, beep, 7);
static struct attribute *gl520_attributes[] = {
&dev_attr_cpu0_vid.attr,
&sensor_dev_attr_in0_input.dev_attr.attr,
&sensor_dev_attr_in0_min.dev_attr.attr,
&sensor_dev_attr_in0_max.dev_attr.attr,
&sensor_dev_attr_in0_alarm.dev_attr.attr,
&sensor_dev_attr_in0_beep.dev_attr.attr,
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in1_min.dev_attr.attr,
&sensor_dev_attr_in1_max.dev_attr.attr,
&sensor_dev_attr_in1_alarm.dev_attr.attr,
&sensor_dev_attr_in1_beep.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
&sensor_dev_attr_in2_min.dev_attr.attr,
&sensor_dev_attr_in2_max.dev_attr.attr,
&sensor_dev_attr_in2_alarm.dev_attr.attr,
&sensor_dev_attr_in2_beep.dev_attr.attr,
&sensor_dev_attr_in3_input.dev_attr.attr,
&sensor_dev_attr_in3_min.dev_attr.attr,
&sensor_dev_attr_in3_max.dev_attr.attr,
&sensor_dev_attr_in3_alarm.dev_attr.attr,
&sensor_dev_attr_in3_beep.dev_attr.attr,
&sensor_dev_attr_fan1_input.dev_attr.attr,
&sensor_dev_attr_fan1_min.dev_attr.attr,
&sensor_dev_attr_fan1_div.dev_attr.attr,
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
&sensor_dev_attr_fan1_beep.dev_attr.attr,
&dev_attr_fan1_off.attr,
&sensor_dev_attr_fan2_input.dev_attr.attr,
&sensor_dev_attr_fan2_min.dev_attr.attr,
&sensor_dev_attr_fan2_div.dev_attr.attr,
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
&sensor_dev_attr_fan2_beep.dev_attr.attr,
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
&sensor_dev_attr_temp1_alarm.dev_attr.attr,
&sensor_dev_attr_temp1_beep.dev_attr.attr,
&dev_attr_alarms.attr,
&dev_attr_beep_enable.attr,
&dev_attr_beep_mask.attr,
NULL
};
static const struct attribute_group gl520_group = {
.attrs = gl520_attributes,
};
static struct attribute *gl520_attributes_in4[] = {
&sensor_dev_attr_in4_input.dev_attr.attr,
&sensor_dev_attr_in4_min.dev_attr.attr,
&sensor_dev_attr_in4_max.dev_attr.attr,
&sensor_dev_attr_in4_alarm.dev_attr.attr,
&sensor_dev_attr_in4_beep.dev_attr.attr,
NULL
};
static struct attribute *gl520_attributes_temp2[] = {
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
&sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
&sensor_dev_attr_temp2_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_beep.dev_attr.attr,
NULL
};
static const struct attribute_group gl520_group_in4 = {
.attrs = gl520_attributes_in4,
};
static const struct attribute_group gl520_group_temp2 = {
.attrs = gl520_attributes_temp2,
};
/*
* Real code
*/
/* Return 0 if detection is successful, -ENODEV otherwise */
static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
{
struct i2c_adapter *adapter = client->adapter;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA))
return -ENODEV;
/* Determine the chip type. */
if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
dev_dbg(&client->dev, "Unknown chip type, skipping\n");
return -ENODEV;
}
strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
return 0;
}
/* Called when we have found a new GL520SM. */
static void gl520_init_client(struct i2c_client *client)
{
struct gl520_data *data = i2c_get_clientdata(client);
u8 oldconf, conf;
conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
data->alarm_mask = 0xff;
data->vrm = vid_which_vrm();
if (extra_sensor_type == 1)
conf &= ~0x10;
else if (extra_sensor_type == 2)
conf |= 0x10;
data->two_temps = !(conf & 0x10);
/* If IRQ# is disabled, we can safely force comparator mode */
if (!(conf & 0x20))
conf &= 0xf7;
/* Enable monitoring if needed */
conf |= 0x40;
if (conf != oldconf)
gl520_write_value(client, GL520_REG_CONF, conf);
gl520_update_device(&(client->dev));
if (data->fan_min[0] == 0)
data->alarm_mask &= ~0x20;
if (data->fan_min[1] == 0)
data->alarm_mask &= ~0x40;
data->beep_mask &= data->alarm_mask;
gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
}
static int gl520_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct device *hwmon_dev;
struct gl520_data *data;
data = devm_kzalloc(dev, sizeof(struct gl520_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(client, data);
mutex_init(&data->update_lock);
data->client = client;
/* Initialize the GL520SM chip */
gl520_init_client(client);
/* sysfs hooks */
data->groups[0] = &gl520_group;
if (data->two_temps)
data->groups[1] = &gl520_group_temp2;
else
data->groups[1] = &gl520_group_in4;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data, data->groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id gl520_id[] = {
{ "gl520sm", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, gl520_id);
static struct i2c_driver gl520_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "gl520sm",
},
.probe = gl520_probe,
.id_table = gl520_id,
.detect = gl520_detect,
.address_list = normal_i2c,
};
module_i2c_driver(gl520_driver);
MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
"Kyösti Mälkki <kmalkki@cc.hut.fi>, "
"Maarten Deprez <maartendeprez@users.sourceforge.net>");
MODULE_DESCRIPTION("GL520SM driver");
MODULE_LICENSE("GPL");
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