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linux-stable/drivers/hwmon/sis5595.c
Uwe Kleine-König 39797753fd hwmon: (sis5595) Convert to platform remove callback returning void 
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.
To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new() which already returns void. Eventually after all drivers
are converted, .remove_new() is renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230918085951.1234172-17-u.kleine-koenig@pengutronix.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2023-10-27 07:27:24 -07:00

911 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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>
*/
/*
* 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 DRIVER_NAME "sis5595"
#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;
bool valid; /* true 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 */
/* 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);
}
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 = true;
}
mutex_unlock(&data->update_lock);
return data;
}
/* 4 Voltages */
static ssize_t in_show(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 in_min_show(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 in_max_show(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 in_min_store(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 in_max_store(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;
}
static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
/* Temperature */
static ssize_t temp1_input_show(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 temp1_max_show(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 temp1_max_store(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 temp1_max_hyst_show(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 temp1_max_hyst_store(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_RO(temp1_input);
static DEVICE_ATTR_RW(temp1_max);
static DEVICE_ATTR_RW(temp1_max_hyst);
/* 2 Fans */
static ssize_t fan_show(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 fan_min_show(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 fan_min_store(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 fan_div_show(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 fan_div_store(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;
}
static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
/* Alarms */
static ssize_t alarms_show(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_RO(alarms);
static ssize_t alarm_show(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_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(in4_alarm, alarm, 15);
static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 15);
static ssize_t name_show(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_RO(name);
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,
};
/* 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);
}
/* 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,
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 = DRIVER_NAME;
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 void 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);
}
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 = DRIVER_NAME,
.flags = IORESOURCE_IO,
};
int err;
err = acpi_check_resource_conflict(&res);
if (err)
goto exit;
pdev = platform_device_alloc(DRIVER_NAME, 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 struct platform_driver sis5595_driver = {
.driver = {
.name = DRIVER_NAME,
},
.probe = sis5595_probe,
.remove_new = sis5595_remove,
};
static int sis5595_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
u16 address;
u8 enable;
int *i, err;
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);
}
err = pci_read_config_word(dev, SIS5595_BASE_REG, &address);
if (err != PCIBIOS_SUCCESSFUL) {
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;
}
err = pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable);
if (err != PCIBIOS_SUCCESSFUL) {
dev_err(&dev->dev, "Failed to read enable register\n");
return -ENODEV;
}
if (!(enable & 0x80)) {
err = pci_write_config_byte(dev, SIS5595_ENABLE_REG, enable | 0x80);
if (err != PCIBIOS_SUCCESSFUL)
goto enable_fail;
err = pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable);
if (err != PCIBIOS_SUCCESSFUL)
goto enable_fail;
/* doesn't work for some chips! */
if (!(enable & 0x80))
goto enable_fail;
}
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;
enable_fail:
dev_err(&dev->dev, "Failed to enable HWM device\n");
goto exit;
exit_unregister:
pci_dev_put(dev);
platform_driver_unregister(&sis5595_driver);
exit:
return -ENODEV;
}
static struct pci_driver sis5595_pci_driver = {
.name = DRIVER_NAME,
.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);
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