forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
linux-pinenote/drivers/hwmon/sis5595.c
Axel Lin cc336546dd hwmon: (sis5595) Prevent overflow problem when writing large limits 
On platforms with sizeof(int) < sizeof(long), writing a temperature
limit larger than MAXINT will result in unpredictable limit values
written to the chip. Avoid auto-conversion from long to int to fix
the problem.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Cc: stable@vger.kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2014-08-04 09:15:46 -07:00

933 lines
25 KiB
C
Raw Blame History

/*
* sis5595.c - Part of lm_sensors, Linux kernel modules
* for hardware monitoring
*
* Copyright (C) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>,
* Kyösti Mälkki <kmalkki@cc.hut.fi>, and
* Mark D. Studebaker <mdsxyz123@yahoo.com>
* Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with
* the help of Jean Delvare <jdelvare@suse.de>
*
* 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.
*/
/*
* SiS southbridge has a LM78-like chip integrated on the same IC.
* This driver is a customized copy of lm78.c
*
* Supports following revisions:
* Version PCI ID PCI Revision
* 1 1039/0008 AF or less
* 2 1039/0008 B0 or greater
*
* Note: these chips contain a 0008 device which is incompatible with the
* 5595. We recognize these by the presence of the listed
* "blacklist" PCI ID and refuse to load.
*
* NOT SUPPORTED PCI ID BLACKLIST PCI ID
* 540 0008 0540
* 550 0008 0550
* 5513 0008 5511
* 5581 0008 5597
* 5582 0008 5597
* 5597 0008 5597
* 5598 0008 5597/5598
* 630 0008 0630
* 645 0008 0645
* 730 0008 0730
* 735 0008 0735
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/acpi.h>
#include <linux/io.h>
/*
* If force_addr is set to anything different from 0, we forcibly enable
* the device at the given address.
*/
static u16 force_addr;
module_param(force_addr, ushort, 0);
MODULE_PARM_DESC(force_addr,
"Initialize the base address of the sensors");
static struct platform_device *pdev;
/* Many SIS5595 constants specified below */
/* Length of ISA address segment */
#define SIS5595_EXTENT 8
/* PCI Config Registers */
#define SIS5595_BASE_REG 0x68
#define SIS5595_PIN_REG 0x7A
#define SIS5595_ENABLE_REG 0x7B
/* Where are the ISA address/data registers relative to the base address */
#define SIS5595_ADDR_REG_OFFSET 5
#define SIS5595_DATA_REG_OFFSET 6
/* The SIS5595 registers */
#define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2)
#define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2)
#define SIS5595_REG_IN(nr) (0x20 + (nr))
#define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr))
#define SIS5595_REG_FAN(nr) (0x28 + (nr))
/*
* On the first version of the chip, the temp registers are separate.
* On the second version,
* TEMP pin is shared with IN4, configured in PCI register 0x7A.
* The registers are the same as well.
* OVER and HYST are really MAX and MIN.
*/
#define REV2MIN 0xb0
#define SIS5595_REG_TEMP (((data->revision) >= REV2MIN) ? \
SIS5595_REG_IN(4) : 0x27)
#define SIS5595_REG_TEMP_OVER (((data->revision) >= REV2MIN) ? \
SIS5595_REG_IN_MAX(4) : 0x39)
#define SIS5595_REG_TEMP_HYST (((data->revision) >= REV2MIN) ? \
SIS5595_REG_IN_MIN(4) : 0x3a)
#define SIS5595_REG_CONFIG 0x40
#define SIS5595_REG_ALARM1 0x41
#define SIS5595_REG_ALARM2 0x42
#define SIS5595_REG_FANDIV 0x47
/*
* Conversions. Limit checking is only done on the TO_REG
* variants.
*/
/*
* IN: mV, (0V to 4.08V)
* REG: 16mV/bit
*/
static inline u8 IN_TO_REG(unsigned long val)
{
unsigned long nval = clamp_val(val, 0, 4080);
return (nval + 8) / 16;
}
#define IN_FROM_REG(val) ((val) * 16)
static inline u8 FAN_TO_REG(long rpm, int div)
{
if (rpm <= 0)
return 255;
if (rpm > 1350000)
return 1;
return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
}
static inline int FAN_FROM_REG(u8 val, int div)
{
return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
}
/*
* TEMP: mC (-54.12C to +157.53C)
* REG: 0.83C/bit + 52.12, two's complement
*/
static inline int TEMP_FROM_REG(s8 val)
{
return val * 830 + 52120;
}
static inline s8 TEMP_TO_REG(long val)
{
int nval = clamp_val(val, -54120, 157530) ;
return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830;
}
/*
* FAN DIV: 1, 2, 4, or 8 (defaults to 2)
* REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
*/
static inline u8 DIV_TO_REG(int val)
{
return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;
}
#define DIV_FROM_REG(val) (1 << (val))
/*
* For each registered chip, we need to keep some data in memory.
* The structure is dynamically allocated.
*/
struct sis5595_data {
unsigned short addr;
const char *name;
struct device *hwmon_dev;
struct mutex lock;
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
char maxins; /* == 3 if temp enabled, otherwise == 4 */
u8 revision; /* Reg. value */
u8 in[5]; /* Register value */
u8 in_max[5]; /* Register value */
u8 in_min[5]; /* Register value */
u8 fan[2]; /* Register value */
u8 fan_min[2]; /* Register value */
s8 temp; /* Register value */
s8 temp_over; /* Register value */
s8 temp_hyst; /* Register value */
u8 fan_div[2]; /* Register encoding, shifted right */
u16 alarms; /* Register encoding, combined */
};
static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */
static int sis5595_probe(struct platform_device *pdev);
static int sis5595_remove(struct platform_device *pdev);
static int sis5595_read_value(struct sis5595_data *data, u8 reg);
static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value);
static struct sis5595_data *sis5595_update_device(struct device *dev);
static void sis5595_init_device(struct sis5595_data *data);
static struct platform_driver sis5595_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "sis5595",
},
.probe = sis5595_probe,
.remove = sis5595_remove,
};
/* 4 Voltages */
static ssize_t show_in(struct device *dev, struct device_attribute *da,
char *buf)
{
struct sis5595_data *data = sis5595_update_device(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
int nr = attr->index;
return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
}
static ssize_t show_in_min(struct device *dev, struct device_attribute *da,
char *buf)
{
struct sis5595_data *data = sis5595_update_device(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
int nr = attr->index;
return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
}
static ssize_t show_in_max(struct device *dev, struct device_attribute *da,
char *buf)
{
struct sis5595_data *data = sis5595_update_device(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
int nr = attr->index;
return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
}
static ssize_t set_in_min(struct device *dev, struct device_attribute *da,
const char *buf, size_t count)
{
struct sis5595_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
int nr = attr->index;
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->in_min[nr] = IN_TO_REG(val);
sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
const char *buf, size_t count)
{
struct sis5595_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
int nr = attr->index;
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->in_max[nr] = IN_TO_REG(val);
sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
mutex_unlock(&data->update_lock);
return count;
}
#define show_in_offset(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);
show_in_offset(0);
show_in_offset(1);
show_in_offset(2);
show_in_offset(3);
show_in_offset(4);
/* Temperature */
static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sis5595_data *data = sis5595_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
}
static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sis5595_data *data = sis5595_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
}
static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sis5595_data *data = dev_get_drvdata(dev);
long val;
int err;
err = kstrtol(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->temp_over = TEMP_TO_REG(val);
sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sis5595_data *data = sis5595_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
}
static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sis5595_data *data = dev_get_drvdata(dev);
long val;
int err;
err = kstrtol(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->temp_hyst = TEMP_TO_REG(val);
sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
mutex_unlock(&data->update_lock);
return count;
}
static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
show_temp_over, set_temp_over);
static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
show_temp_hyst, set_temp_hyst);
/* 2 Fans */
static ssize_t show_fan(struct device *dev, struct device_attribute *da,
char *buf)
{
struct sis5595_data *data = sis5595_update_device(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
int nr = attr->index;
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 *da,
char *buf)
{
struct sis5595_data *data = sis5595_update_device(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
int nr = attr->index;
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
DIV_FROM_REG(data->fan_div[nr])));
}
static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
const char *buf, size_t count)
{
struct sis5595_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
int nr = attr->index;
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]));
sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
char *buf)
{
struct sis5595_data *data = sis5595_update_device(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
int nr = attr->index;
return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
}
/*
* 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 *da,
const char *buf, size_t count)
{
struct sis5595_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
int nr = attr->index;
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]));
reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
switch (val) {
case 1:
data->fan_div[nr] = 0;
break;
case 2:
data->fan_div[nr] = 1;
break;
case 4:
data->fan_div[nr] = 2;
break;
case 8:
data->fan_div[nr] = 3;
break;
default:
dev_err(dev,
"fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
val);
mutex_unlock(&data->update_lock);
return -EINVAL;
}
switch (nr) {
case 0:
reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
break;
case 1:
reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
break;
}
sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
data->fan_min[nr] =
FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
#define show_fan_offset(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);
show_fan_offset(1);
show_fan_offset(2);
/* Alarms */
static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sis5595_data *data = sis5595_update_device(dev);
return sprintf(buf, "%d\n", data->alarms);
}
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
char *buf)
{
struct sis5595_data *data = sis5595_update_device(dev);
int nr = to_sensor_dev_attr(da)->index;
return sprintf(buf, "%u\n", (data->alarms >> nr) & 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, 15);
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(temp1_alarm, S_IRUGO, show_alarm, NULL, 15);
static ssize_t show_name(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sis5595_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%s\n", data->name);
}
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
static struct attribute *sis5595_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_in0_alarm.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_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_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_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_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,
&dev_attr_alarms.attr,
&dev_attr_name.attr,
NULL
};
static const struct attribute_group sis5595_group = {
.attrs = sis5595_attributes,
};
static struct attribute *sis5595_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,
NULL
};
static const struct attribute_group sis5595_group_in4 = {
.attrs = sis5595_attributes_in4,
};
static struct attribute *sis5595_attributes_temp1[] = {
&dev_attr_temp1_input.attr,
&dev_attr_temp1_max.attr,
&dev_attr_temp1_max_hyst.attr,
&sensor_dev_attr_temp1_alarm.dev_attr.attr,
NULL
};
static const struct attribute_group sis5595_group_temp1 = {
.attrs = sis5595_attributes_temp1,
};
/* This is called when the module is loaded */
static int sis5595_probe(struct platform_device *pdev)
{
int err = 0;
int i;
struct sis5595_data *data;
struct resource *res;
char val;
/* Reserve the ISA region */
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
sis5595_driver.driver.name))
return -EBUSY;
data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
mutex_init(&data->lock);
mutex_init(&data->update_lock);
data->addr = res->start;
data->name = "sis5595";
platform_set_drvdata(pdev, data);
/*
* Check revision and pin registers to determine whether 4 or 5 voltages
*/
data->revision = s_bridge->revision;
/* 4 voltages, 1 temp */
data->maxins = 3;
if (data->revision >= REV2MIN) {
pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
if (!(val & 0x80))
/* 5 voltages, no temps */
data->maxins = 4;
}
/* Initialize the SIS5595 chip */
sis5595_init_device(data);
/* A few vars need to be filled upon startup */
for (i = 0; i < 2; i++) {
data->fan_min[i] = sis5595_read_value(data,
SIS5595_REG_FAN_MIN(i));
}
/* Register sysfs hooks */
err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
if (err)
return err;
if (data->maxins == 4) {
err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
if (err)
goto exit_remove_files;
} else {
err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
if (err)
goto exit_remove_files;
}
data->hwmon_dev = hwmon_device_register(&pdev->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto exit_remove_files;
}
return 0;
exit_remove_files:
sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
return err;
}
static int sis5595_remove(struct platform_device *pdev)
{
struct sis5595_data *data = platform_get_drvdata(pdev);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
return 0;
}
/* ISA access must be locked explicitly. */
static int sis5595_read_value(struct sis5595_data *data, u8 reg)
{
int res;
mutex_lock(&data->lock);
outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
mutex_unlock(&data->lock);
return res;
}
static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
{
mutex_lock(&data->lock);
outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
mutex_unlock(&data->lock);
}
/* Called when we have found a new SIS5595. */
static void sis5595_init_device(struct sis5595_data *data)
{
u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
if (!(config & 0x01))
sis5595_write_value(data, SIS5595_REG_CONFIG,
(config & 0xf7) | 0x01);
}
static struct sis5595_data *sis5595_update_device(struct device *dev)
{
struct sis5595_data *data = dev_get_drvdata(dev);
int i;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|| !data->valid) {
for (i = 0; i <= data->maxins; i++) {
data->in[i] =
sis5595_read_value(data, SIS5595_REG_IN(i));
data->in_min[i] =
sis5595_read_value(data,
SIS5595_REG_IN_MIN(i));
data->in_max[i] =
sis5595_read_value(data,
SIS5595_REG_IN_MAX(i));
}
for (i = 0; i < 2; i++) {
data->fan[i] =
sis5595_read_value(data, SIS5595_REG_FAN(i));
data->fan_min[i] =
sis5595_read_value(data,
SIS5595_REG_FAN_MIN(i));
}
if (data->maxins == 3) {
data->temp =
sis5595_read_value(data, SIS5595_REG_TEMP);
data->temp_over =
sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
data->temp_hyst =
sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
}
i = sis5595_read_value(data, SIS5595_REG_FANDIV);
data->fan_div[0] = (i >> 4) & 0x03;
data->fan_div[1] = i >> 6;
data->alarms =
sis5595_read_value(data, SIS5595_REG_ALARM1) |
(sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
static const struct pci_device_id sis5595_pci_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
static int blacklist[] = {
PCI_DEVICE_ID_SI_540,
PCI_DEVICE_ID_SI_550,
PCI_DEVICE_ID_SI_630,
PCI_DEVICE_ID_SI_645,
PCI_DEVICE_ID_SI_730,
PCI_DEVICE_ID_SI_735,
PCI_DEVICE_ID_SI_5511, /*
* 5513 chip has the 0008 device but
* that ID shows up in other chips so we
* use the 5511 ID for recognition
*/
PCI_DEVICE_ID_SI_5597,
PCI_DEVICE_ID_SI_5598,
0 };
static int sis5595_device_add(unsigned short address)
{
struct resource res = {
.start = address,
.end = address + SIS5595_EXTENT - 1,
.name = "sis5595",
.flags = IORESOURCE_IO,
};
int err;
err = acpi_check_resource_conflict(&res);
if (err)
goto exit;
pdev = platform_device_alloc("sis5595", address);
if (!pdev) {
err = -ENOMEM;
pr_err("Device allocation failed\n");
goto exit;
}
err = platform_device_add_resources(pdev, &res, 1);
if (err) {
pr_err("Device resource addition failed (%d)\n", err);
goto exit_device_put;
}
err = platform_device_add(pdev);
if (err) {
pr_err("Device addition failed (%d)\n", err);
goto exit_device_put;
}
return 0;
exit_device_put:
platform_device_put(pdev);
exit:
return err;
}
static int sis5595_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
u16 address;
u8 enable;
int *i;
for (i = blacklist; *i != 0; i++) {
struct pci_dev *d;
d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
if (d) {
dev_err(&d->dev,
"Looked for SIS5595 but found unsupported device %.4x\n",
*i);
pci_dev_put(d);
return -ENODEV;
}
}
force_addr &= ~(SIS5595_EXTENT - 1);
if (force_addr) {
dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
}
if (PCIBIOS_SUCCESSFUL !=
pci_read_config_word(dev, SIS5595_BASE_REG, &address)) {
dev_err(&dev->dev, "Failed to read ISA address\n");
return -ENODEV;
}
address &= ~(SIS5595_EXTENT - 1);
if (!address) {
dev_err(&dev->dev,
"Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
return -ENODEV;
}
if (force_addr && address != force_addr) {
/* doesn't work for some chips? */
dev_err(&dev->dev, "Failed to force ISA address\n");
return -ENODEV;
}
if (PCIBIOS_SUCCESSFUL !=
pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) {
dev_err(&dev->dev, "Failed to read enable register\n");
return -ENODEV;
}
if (!(enable & 0x80)) {
if ((PCIBIOS_SUCCESSFUL !=
pci_write_config_byte(dev, SIS5595_ENABLE_REG,
enable | 0x80))
|| (PCIBIOS_SUCCESSFUL !=
pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable))
|| (!(enable & 0x80))) {
/* doesn't work for some chips! */
dev_err(&dev->dev, "Failed to enable HWM device\n");
return -ENODEV;
}
}
if (platform_driver_register(&sis5595_driver)) {
dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
goto exit;
}
s_bridge = pci_dev_get(dev);
/* Sets global pdev as a side effect */
if (sis5595_device_add(address))
goto exit_unregister;
/*
* Always return failure here. This is to allow other drivers to bind
* to this pci device. We don't really want to have control over the
* pci device, we only wanted to read as few register values from it.
*/
return -ENODEV;
exit_unregister:
pci_dev_put(dev);
platform_driver_unregister(&sis5595_driver);
exit:
return -ENODEV;
}
static struct pci_driver sis5595_pci_driver = {
.name = "sis5595",
.id_table = sis5595_pci_ids,
.probe = sis5595_pci_probe,
};
static int __init sm_sis5595_init(void)
{
return pci_register_driver(&sis5595_pci_driver);
}
static void __exit sm_sis5595_exit(void)
{
pci_unregister_driver(&sis5595_pci_driver);
if (s_bridge != NULL) {
platform_device_unregister(pdev);
platform_driver_unregister(&sis5595_driver);
pci_dev_put(s_bridge);
s_bridge = NULL;
}
}
MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
MODULE_DESCRIPTION("SiS 5595 Sensor device");
MODULE_LICENSE("GPL");
module_init(sm_sis5595_init);
module_exit(sm_sis5595_exit);
Reference in a new issue View git blame Copy permalink