redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity
alistair23-linux/drivers/hwmon/asb100.c
Julia Lawall 82e73f7f95 hwmon: (asb100) use permission-specific DEVICE_ATTR variants 
Use DEVICE_ATTR_RO for read only attributes and DEVICE_ATTR_RW for
read/write attributes. This simplifies the source code, improves
readbility, and reduces the chance of inconsistencies.

The conversion was done automatically using coccinelle. It was validated
by compiling both the old and the new source code and comparing its text,
data, and bss size.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
[groeck: Updated description]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-01-02 10:19:45 -08:00

1026 lines
28 KiB
C
Raw Blame History

/*
* asb100.c - Part of lm_sensors, Linux kernel modules for hardware
* monitoring
*
* Copyright (C) 2004 Mark M. Hoffman <mhoffman@lightlink.com>
*
* (derived from w83781d.c)
*
* Copyright (C) 1998 - 2003 Frodo Looijaard <frodol@dds.nl>,
* Philip Edelbrock <phil@netroedge.com>, and
* Mark Studebaker <mdsxyz123@yahoo.com>
*
* 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.
*/
/*
* This driver supports the hardware sensor chips: Asus ASB100 and
* ASB100-A "BACH".
*
* ASB100-A supports pwm1, while plain ASB100 does not. There is no known
* way for the driver to tell which one is there.
*
* Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
* asb100 7 3 1 4 0x31 0x0694 yes no
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/slab.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/init.h>
#include <linux/jiffies.h>
#include <linux/mutex.h>
#include "lm75.h"
/* I2C addresses to scan */
static const unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };
static unsigned short force_subclients[4];
module_param_array(force_subclients, short, NULL, 0);
MODULE_PARM_DESC(force_subclients,
"List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");
/* Voltage IN registers 0-6 */
#define ASB100_REG_IN(nr) (0x20 + (nr))
#define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2))
#define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2))
/* FAN IN registers 1-3 */
#define ASB100_REG_FAN(nr) (0x28 + (nr))
#define ASB100_REG_FAN_MIN(nr) (0x3b + (nr))
/* TEMPERATURE registers 1-4 */
static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17};
static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18};
static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19};
#define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr])
#define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr])
#define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr])
#define ASB100_REG_TEMP2_CONFIG 0x0152
#define ASB100_REG_TEMP3_CONFIG 0x0252
#define ASB100_REG_CONFIG 0x40
#define ASB100_REG_ALARM1 0x41
#define ASB100_REG_ALARM2 0x42
#define ASB100_REG_SMIM1 0x43
#define ASB100_REG_SMIM2 0x44
#define ASB100_REG_VID_FANDIV 0x47
#define ASB100_REG_I2C_ADDR 0x48
#define ASB100_REG_CHIPID 0x49
#define ASB100_REG_I2C_SUBADDR 0x4a
#define ASB100_REG_PIN 0x4b
#define ASB100_REG_IRQ 0x4c
#define ASB100_REG_BANK 0x4e
#define ASB100_REG_CHIPMAN 0x4f
#define ASB100_REG_WCHIPID 0x58
/* bit 7 -> enable, bits 0-3 -> duty cycle */
#define ASB100_REG_PWM1 0x59
/*
* CONVERSIONS
* Rounding and limit checking is only done on the TO_REG variants.
*/
/* These constants are a guess, consistent w/ w83781d */
#define ASB100_IN_MIN 0
#define ASB100_IN_MAX 4080
/*
* IN: 1/1000 V (0V to 4.08V)
* REG: 16mV/bit
*/
static u8 IN_TO_REG(unsigned val)
{
unsigned nval = clamp_val(val, ASB100_IN_MIN, ASB100_IN_MAX);
return (nval + 8) / 16;
}
static unsigned IN_FROM_REG(u8 reg)
{
return reg * 16;
}
static u8 FAN_TO_REG(long rpm, int div)
{
if (rpm == -1)
return 0;
if (rpm == 0)
return 255;
rpm = clamp_val(rpm, 1, 1000000);
return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
}
static int FAN_FROM_REG(u8 val, int div)
{
return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
}
/* These constants are a guess, consistent w/ w83781d */
#define ASB100_TEMP_MIN -128000
#define ASB100_TEMP_MAX 127000
/*
* TEMP: 0.001C/bit (-128C to +127C)
* REG: 1C/bit, two's complement
*/
static u8 TEMP_TO_REG(long temp)
{
int ntemp = clamp_val(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX);
ntemp += (ntemp < 0 ? -500 : 500);
return (u8)(ntemp / 1000);
}
static int TEMP_FROM_REG(u8 reg)
{
return (s8)reg * 1000;
}
/*
* PWM: 0 - 255 per sensors documentation
* REG: (6.25% duty cycle per bit)
*/
static u8 ASB100_PWM_TO_REG(int pwm)
{
pwm = clamp_val(pwm, 0, 255);
return (u8)(pwm / 16);
}
static int ASB100_PWM_FROM_REG(u8 reg)
{
return reg * 16;
}
#define DIV_FROM_REG(val) (1 << (val))
/*
* FAN DIV: 1, 2, 4, or 8 (defaults to 2)
* REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
*/
static u8 DIV_TO_REG(long val)
{
return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;
}
/*
* For each registered client, we need to keep some data in memory. That
* data is pointed to by client->data. The structure itself is
* dynamically allocated, at the same time the client itself is allocated.
*/
struct asb100_data {
struct device *hwmon_dev;
struct mutex lock;
struct mutex update_lock;
unsigned long last_updated; /* In jiffies */
/* array of 2 pointers to subclients */
struct i2c_client *lm75[2];
char valid; /* !=0 if following fields are valid */
u8 in[7]; /* Register value */
u8 in_max[7]; /* Register value */
u8 in_min[7]; /* Register value */
u8 fan[3]; /* Register value */
u8 fan_min[3]; /* Register value */
u16 temp[4]; /* Register value (0 and 3 are u8 only) */
u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */
u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */
u8 fan_div[3]; /* Register encoding, right justified */
u8 pwm; /* Register encoding */
u8 vid; /* Register encoding, combined */
u32 alarms; /* Register encoding, combined */
u8 vrm;
};
static int asb100_read_value(struct i2c_client *client, u16 reg);
static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);
static int asb100_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static int asb100_detect(struct i2c_client *client,
struct i2c_board_info *info);
static int asb100_remove(struct i2c_client *client);
static struct asb100_data *asb100_update_device(struct device *dev);
static void asb100_init_client(struct i2c_client *client);
static const struct i2c_device_id asb100_id[] = {
{ "asb100", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, asb100_id);
static struct i2c_driver asb100_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "asb100",
},
.probe = asb100_probe,
.remove = asb100_remove,
.id_table = asb100_id,
.detect = asb100_detect,
.address_list = normal_i2c,
};
/* 7 Voltages */
#define show_in_reg(reg) \
static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
char *buf) \
{ \
int nr = to_sensor_dev_attr(attr)->index; \
struct asb100_data *data = asb100_update_device(dev); \
return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
}
show_in_reg(in)
show_in_reg(in_min)
show_in_reg(in_max)
#define set_in_reg(REG, reg) \
static ssize_t set_in_##reg(struct device *dev, struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
int nr = to_sensor_dev_attr(attr)->index; \
struct i2c_client *client = to_i2c_client(dev); \
struct asb100_data *data = i2c_get_clientdata(client); \
unsigned long val; \
int err = kstrtoul(buf, 10, &val); \
if (err) \
return err; \
mutex_lock(&data->update_lock); \
data->in_##reg[nr] = IN_TO_REG(val); \
asb100_write_value(client, ASB100_REG_IN_##REG(nr), \
data->in_##reg[nr]); \
mutex_unlock(&data->update_lock); \
return count; \
}
set_in_reg(MIN, min)
set_in_reg(MAX, max)
#define sysfs_in(offset) \
static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
show_in, NULL, offset); \
static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
show_in_min, set_in_min, offset); \
static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
show_in_max, set_in_max, offset)
sysfs_in(0);
sysfs_in(1);
sysfs_in(2);
sysfs_in(3);
sysfs_in(4);
sysfs_in(5);
sysfs_in(6);
/* 3 Fans */
static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
char *buf)
{
int nr = to_sensor_dev_attr(attr)->index;
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
DIV_FROM_REG(data->fan_div[nr])));
}
static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
int nr = to_sensor_dev_attr(attr)->index;
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
DIV_FROM_REG(data->fan_div[nr])));
}
static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
char *buf)
{
int nr = to_sensor_dev_attr(attr)->index;
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
}
static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int nr = to_sensor_dev_attr(attr)->index;
struct i2c_client *client = to_i2c_client(dev);
struct asb100_data *data = i2c_get_clientdata(client);
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
/*
* Note: we save and restore the fan minimum here, because its value is
* determined in part by the fan divisor. This follows the principle of
* least surprise; the user doesn't expect the fan minimum to change just
* because the divisor changed.
*/
static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int nr = to_sensor_dev_attr(attr)->index;
struct i2c_client *client = to_i2c_client(dev);
struct asb100_data *data = i2c_get_clientdata(client);
unsigned long min;
int reg;
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
min = FAN_FROM_REG(data->fan_min[nr],
DIV_FROM_REG(data->fan_div[nr]));
data->fan_div[nr] = DIV_TO_REG(val);
switch (nr) {
case 0: /* fan 1 */
reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
reg = (reg & 0xcf) | (data->fan_div[0] << 4);
asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
break;
case 1: /* fan 2 */
reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
reg = (reg & 0x3f) | (data->fan_div[1] << 6);
asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
break;
case 2: /* fan 3 */
reg = asb100_read_value(client, ASB100_REG_PIN);
reg = (reg & 0x3f) | (data->fan_div[2] << 6);
asb100_write_value(client, ASB100_REG_PIN, reg);
break;
}
data->fan_min[nr] =
FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
#define sysfs_fan(offset) \
static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
show_fan, NULL, offset - 1); \
static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
show_fan_min, set_fan_min, offset - 1); \
static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
show_fan_div, set_fan_div, offset - 1)
sysfs_fan(1);
sysfs_fan(2);
sysfs_fan(3);
/* 4 Temp. Sensors */
static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)
{
int ret = 0;
switch (nr) {
case 1: case 2:
ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));
break;
case 0: case 3: default:
ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));
break;
}
return ret;
}
#define show_temp_reg(reg) \
static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
char *buf) \
{ \
int nr = to_sensor_dev_attr(attr)->index; \
struct asb100_data *data = asb100_update_device(dev); \
return sprintf_temp_from_reg(data->reg[nr], buf, nr); \
}
show_temp_reg(temp);
show_temp_reg(temp_max);
show_temp_reg(temp_hyst);
#define set_temp_reg(REG, reg) \
static ssize_t set_##reg(struct device *dev, struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
int nr = to_sensor_dev_attr(attr)->index; \
struct i2c_client *client = to_i2c_client(dev); \
struct asb100_data *data = i2c_get_clientdata(client); \
long val; \
int err = kstrtol(buf, 10, &val); \
if (err) \
return err; \
mutex_lock(&data->update_lock); \
switch (nr) { \
case 1: case 2: \
data->reg[nr] = LM75_TEMP_TO_REG(val); \
break; \
case 0: case 3: default: \
data->reg[nr] = TEMP_TO_REG(val); \
break; \
} \
asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \
data->reg[nr]); \
mutex_unlock(&data->update_lock); \
return count; \
}
set_temp_reg(MAX, temp_max);
set_temp_reg(HYST, temp_hyst);
#define sysfs_temp(num) \
static SENSOR_DEVICE_ATTR(temp##num##_input, S_IRUGO, \
show_temp, NULL, num - 1); \
static SENSOR_DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \
show_temp_max, set_temp_max, num - 1); \
static SENSOR_DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \
show_temp_hyst, set_temp_hyst, num - 1)
sysfs_temp(1);
sysfs_temp(2);
sysfs_temp(3);
sysfs_temp(4);
/* VID */
static ssize_t cpu0_vid_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
}
static DEVICE_ATTR_RO(cpu0_vid);
/* VRM */
static ssize_t vrm_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct asb100_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", data->vrm);
}
static ssize_t vrm_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct asb100_data *data = dev_get_drvdata(dev);
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
if (val > 255)
return -EINVAL;
data->vrm = val;
return count;
}
/* Alarms */
static DEVICE_ATTR_RW(vrm);
static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%u\n", data->alarms);
}
static DEVICE_ATTR_RO(alarms);
static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
char *buf)
{
int bitnr = to_sensor_dev_attr(attr)->index;
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
}
static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11);
static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13);
/* 1 PWM */
static ssize_t pwm1_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));
}
static ssize_t pwm1_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct asb100_data *data = i2c_get_clientdata(client);
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->pwm &= 0x80; /* keep the enable bit */
data->pwm |= (0x0f & ASB100_PWM_TO_REG(val));
asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t pwm1_enable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);
}
static ssize_t pwm1_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct asb100_data *data = i2c_get_clientdata(client);
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->pwm &= 0x0f; /* keep the duty cycle bits */
data->pwm |= (val ? 0x80 : 0x00);
asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
mutex_unlock(&data->update_lock);
return count;
}
static DEVICE_ATTR_RW(pwm1);
static DEVICE_ATTR_RW(pwm1_enable);
static struct attribute *asb100_attributes[] = {
&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_in1_input.dev_attr.attr,
&sensor_dev_attr_in1_min.dev_attr.attr,
&sensor_dev_attr_in1_max.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_in3_input.dev_attr.attr,
&sensor_dev_attr_in3_min.dev_attr.attr,
&sensor_dev_attr_in3_max.dev_attr.attr,
&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_in5_input.dev_attr.attr,
&sensor_dev_attr_in5_min.dev_attr.attr,
&sensor_dev_attr_in5_max.dev_attr.attr,
&sensor_dev_attr_in6_input.dev_attr.attr,
&sensor_dev_attr_in6_min.dev_attr.attr,
&sensor_dev_attr_in6_max.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_fan2_input.dev_attr.attr,
&sensor_dev_attr_fan2_min.dev_attr.attr,
&sensor_dev_attr_fan2_div.dev_attr.attr,
&sensor_dev_attr_fan3_input.dev_attr.attr,
&sensor_dev_attr_fan3_min.dev_attr.attr,
&sensor_dev_attr_fan3_div.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_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_temp3_input.dev_attr.attr,
&sensor_dev_attr_temp3_max.dev_attr.attr,
&sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
&sensor_dev_attr_temp4_input.dev_attr.attr,
&sensor_dev_attr_temp4_max.dev_attr.attr,
&sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
&sensor_dev_attr_in0_alarm.dev_attr.attr,
&sensor_dev_attr_in1_alarm.dev_attr.attr,
&sensor_dev_attr_in2_alarm.dev_attr.attr,
&sensor_dev_attr_in3_alarm.dev_attr.attr,
&sensor_dev_attr_in4_alarm.dev_attr.attr,
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
&sensor_dev_attr_fan3_alarm.dev_attr.attr,
&sensor_dev_attr_temp1_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_alarm.dev_attr.attr,
&sensor_dev_attr_temp3_alarm.dev_attr.attr,
&dev_attr_cpu0_vid.attr,
&dev_attr_vrm.attr,
&dev_attr_alarms.attr,
&dev_attr_pwm1.attr,
&dev_attr_pwm1_enable.attr,
NULL
};
static const struct attribute_group asb100_group = {
.attrs = asb100_attributes,
};
static int asb100_detect_subclients(struct i2c_client *client)
{
int i, id, err;
int address = client->addr;
unsigned short sc_addr[2];
struct asb100_data *data = i2c_get_clientdata(client);
struct i2c_adapter *adapter = client->adapter;
id = i2c_adapter_id(adapter);
if (force_subclients[0] == id && force_subclients[1] == address) {
for (i = 2; i <= 3; i++) {
if (force_subclients[i] < 0x48 ||
force_subclients[i] > 0x4f) {
dev_err(&client->dev,
"invalid subclient address %d; must be 0x48-0x4f\n",
force_subclients[i]);
err = -ENODEV;
goto ERROR_SC_2;
}
}
asb100_write_value(client, ASB100_REG_I2C_SUBADDR,
(force_subclients[2] & 0x07) |
((force_subclients[3] & 0x07) << 4));
sc_addr[0] = force_subclients[2];
sc_addr[1] = force_subclients[3];
} else {
int val = asb100_read_value(client, ASB100_REG_I2C_SUBADDR);
sc_addr[0] = 0x48 + (val & 0x07);
sc_addr[1] = 0x48 + ((val >> 4) & 0x07);
}
if (sc_addr[0] == sc_addr[1]) {
dev_err(&client->dev,
"duplicate addresses 0x%x for subclients\n",
sc_addr[0]);
err = -ENODEV;
goto ERROR_SC_2;
}
data->lm75[0] = i2c_new_dummy(adapter, sc_addr[0]);
if (!data->lm75[0]) {
dev_err(&client->dev,
"subclient %d registration at address 0x%x failed.\n",
1, sc_addr[0]);
err = -ENOMEM;
goto ERROR_SC_2;
}
data->lm75[1] = i2c_new_dummy(adapter, sc_addr[1]);
if (!data->lm75[1]) {
dev_err(&client->dev,
"subclient %d registration at address 0x%x failed.\n",
2, sc_addr[1]);
err = -ENOMEM;
goto ERROR_SC_3;
}
return 0;
/* Undo inits in case of errors */
ERROR_SC_3:
i2c_unregister_device(data->lm75[0]);
ERROR_SC_2:
return err;
}
/* Return 0 if detection is successful, -ENODEV otherwise */
static int asb100_detect(struct i2c_client *client,
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = client->adapter;
int val1, val2;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
pr_debug("detect failed, smbus byte data not supported!\n");
return -ENODEV;
}
val1 = i2c_smbus_read_byte_data(client, ASB100_REG_BANK);
val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN);
/* If we're in bank 0 */
if ((!(val1 & 0x07)) &&
/* Check for ASB100 ID (low byte) */
(((!(val1 & 0x80)) && (val2 != 0x94)) ||
/* Check for ASB100 ID (high byte ) */
((val1 & 0x80) && (val2 != 0x06)))) {
pr_debug("detect failed, bad chip id 0x%02x!\n", val2);
return -ENODEV;
}
/* Put it now into bank 0 and Vendor ID High Byte */
i2c_smbus_write_byte_data(client, ASB100_REG_BANK,
(i2c_smbus_read_byte_data(client, ASB100_REG_BANK) & 0x78)
| 0x80);
/* Determine the chip type. */
val1 = i2c_smbus_read_byte_data(client, ASB100_REG_WCHIPID);
val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN);
if (val1 != 0x31 || val2 != 0x06)
return -ENODEV;
strlcpy(info->type, "asb100", I2C_NAME_SIZE);
return 0;
}
static int asb100_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int err;
struct asb100_data *data;
data = devm_kzalloc(&client->dev, sizeof(struct asb100_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(client, data);
mutex_init(&data->lock);
mutex_init(&data->update_lock);
/* Attach secondary lm75 clients */
err = asb100_detect_subclients(client);
if (err)
return err;
/* Initialize the chip */
asb100_init_client(client);
/* A few vars need to be filled upon startup */
data->fan_min[0] = asb100_read_value(client, ASB100_REG_FAN_MIN(0));
data->fan_min[1] = asb100_read_value(client, ASB100_REG_FAN_MIN(1));
data->fan_min[2] = asb100_read_value(client, ASB100_REG_FAN_MIN(2));
/* Register sysfs hooks */
err = sysfs_create_group(&client->dev.kobj, &asb100_group);
if (err)
goto ERROR3;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto ERROR4;
}
return 0;
ERROR4:
sysfs_remove_group(&client->dev.kobj, &asb100_group);
ERROR3:
i2c_unregister_device(data->lm75[1]);
i2c_unregister_device(data->lm75[0]);
return err;
}
static int asb100_remove(struct i2c_client *client)
{
struct asb100_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &asb100_group);
i2c_unregister_device(data->lm75[1]);
i2c_unregister_device(data->lm75[0]);
return 0;
}
/*
* The SMBus locks itself, usually, but nothing may access the chip between
* bank switches.
*/
static int asb100_read_value(struct i2c_client *client, u16 reg)
{
struct asb100_data *data = i2c_get_clientdata(client);
struct i2c_client *cl;
int res, bank;
mutex_lock(&data->lock);
bank = (reg >> 8) & 0x0f;
if (bank > 2)
/* switch banks */
i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
if (bank == 0 || bank > 2) {
res = i2c_smbus_read_byte_data(client, reg & 0xff);
} else {
/* switch to subclient */
cl = data->lm75[bank - 1];
/* convert from ISA to LM75 I2C addresses */
switch (reg & 0xff) {
case 0x50: /* TEMP */
res = i2c_smbus_read_word_swapped(cl, 0);
break;
case 0x52: /* CONFIG */
res = i2c_smbus_read_byte_data(cl, 1);
break;
case 0x53: /* HYST */
res = i2c_smbus_read_word_swapped(cl, 2);
break;
case 0x55: /* MAX */
default:
res = i2c_smbus_read_word_swapped(cl, 3);
break;
}
}
if (bank > 2)
i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
mutex_unlock(&data->lock);
return res;
}
static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)
{
struct asb100_data *data = i2c_get_clientdata(client);
struct i2c_client *cl;
int bank;
mutex_lock(&data->lock);
bank = (reg >> 8) & 0x0f;
if (bank > 2)
/* switch banks */
i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
if (bank == 0 || bank > 2) {
i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff);
} else {
/* switch to subclient */
cl = data->lm75[bank - 1];
/* convert from ISA to LM75 I2C addresses */
switch (reg & 0xff) {
case 0x52: /* CONFIG */
i2c_smbus_write_byte_data(cl, 1, value & 0xff);
break;
case 0x53: /* HYST */
i2c_smbus_write_word_swapped(cl, 2, value);
break;
case 0x55: /* MAX */
i2c_smbus_write_word_swapped(cl, 3, value);
break;
}
}
if (bank > 2)
i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
mutex_unlock(&data->lock);
}
static void asb100_init_client(struct i2c_client *client)
{
struct asb100_data *data = i2c_get_clientdata(client);
data->vrm = vid_which_vrm();
/* Start monitoring */
asb100_write_value(client, ASB100_REG_CONFIG,
(asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);
}
static struct asb100_data *asb100_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct asb100_data *data = i2c_get_clientdata(client);
int i;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|| !data->valid) {
dev_dbg(&client->dev, "starting device update...\n");
/* 7 voltage inputs */
for (i = 0; i < 7; i++) {
data->in[i] = asb100_read_value(client,
ASB100_REG_IN(i));
data->in_min[i] = asb100_read_value(client,
ASB100_REG_IN_MIN(i));
data->in_max[i] = asb100_read_value(client,
ASB100_REG_IN_MAX(i));
}
/* 3 fan inputs */
for (i = 0; i < 3; i++) {
data->fan[i] = asb100_read_value(client,
ASB100_REG_FAN(i));
data->fan_min[i] = asb100_read_value(client,
ASB100_REG_FAN_MIN(i));
}
/* 4 temperature inputs */
for (i = 1; i <= 4; i++) {
data->temp[i-1] = asb100_read_value(client,
ASB100_REG_TEMP(i));
data->temp_max[i-1] = asb100_read_value(client,
ASB100_REG_TEMP_MAX(i));
data->temp_hyst[i-1] = asb100_read_value(client,
ASB100_REG_TEMP_HYST(i));
}
/* VID and fan divisors */
i = asb100_read_value(client, ASB100_REG_VID_FANDIV);
data->vid = i & 0x0f;
data->vid |= (asb100_read_value(client,
ASB100_REG_CHIPID) & 0x01) << 4;
data->fan_div[0] = (i >> 4) & 0x03;
data->fan_div[1] = (i >> 6) & 0x03;
data->fan_div[2] = (asb100_read_value(client,
ASB100_REG_PIN) >> 6) & 0x03;
/* PWM */
data->pwm = asb100_read_value(client, ASB100_REG_PWM1);
/* alarms */
data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +
(asb100_read_value(client, ASB100_REG_ALARM2) << 8);
data->last_updated = jiffies;
data->valid = 1;
dev_dbg(&client->dev, "... device update complete\n");
}
mutex_unlock(&data->update_lock);
return data;
}
module_i2c_driver(asb100_driver);
MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
MODULE_DESCRIPTION("ASB100 Bach driver");
MODULE_LICENSE("GPL");
View git blame Copy permalink