it87.c - Part of lm_sensors, Linux kernel modules for hardware
monitoring.
- Supports: IT8705F Super I/O chip w/LPC interface & SMBus
+ Supports: IT8705F Super I/O chip w/LPC interface
IT8712F Super I/O chip w/LPC interface & SMBus
Sis950 A clone of the IT8705F
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/i2c-isa.h>
-#include <linux/i2c-vid.h>
-#include <linux/hwmon-sysfs.h>
#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/hwmon-vid.h>
#include <linux/err.h>
+#include <linux/mutex.h>
#include <asm/io.h>
/* Addresses to scan */
-static unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
- 0x2e, 0x2f, I2C_CLIENT_END };
-static unsigned short isa_address = 0x290;
+static unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };
+static unsigned short isa_address;
/* Insmod parameters */
I2C_CLIENT_INSMOD_2(it87, it8712);
struct it87_data {
struct i2c_client client;
struct class_device *class_dev;
- struct semaphore lock;
+ struct mutex lock;
enum chips type;
- struct semaphore update_lock;
+ struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
u8 sensor; /* Register value */
u8 fan_div[3]; /* Register encoding, shifted right */
u8 vid; /* Register encoding, combined */
- int vrm;
+ u8 vrm;
u32 alarms; /* Register encoding, combined */
u8 fan_main_ctrl; /* Register value */
u8 manual_pwm_ctl[3]; /* manual PWM value set by user */
static int it87_detect(struct i2c_adapter *adapter, int address, int kind);
static int it87_detach_client(struct i2c_client *client);
-static int it87_read_value(struct i2c_client *client, u8 register);
-static int it87_write_value(struct i2c_client *client, u8 register,
- u8 value);
+static int it87_read_value(struct i2c_client *client, u8 reg);
+static int it87_write_value(struct i2c_client *client, u8 reg, u8 value);
static struct it87_data *it87_update_device(struct device *dev);
static int it87_check_pwm(struct i2c_client *client);
static void it87_init_client(struct i2c_client *client, struct it87_data *data);
static struct i2c_driver it87_driver = {
- .owner = THIS_MODULE,
- .name = "it87",
+ .driver = {
+ .name = "it87",
+ },
.id = I2C_DRIVERID_IT87,
- .flags = I2C_DF_NOTIFY,
.attach_adapter = it87_attach_adapter,
.detach_client = it87_detach_client,
};
static struct i2c_driver it87_isa_driver = {
- .owner = THIS_MODULE,
- .name = "it87-isa",
+ .driver = {
+ .name = "it87-isa",
+ },
.attach_adapter = it87_isa_attach_adapter,
.detach_client = it87_detach_client,
};
struct it87_data *data = i2c_get_clientdata(client);
unsigned long val = simple_strtoul(buf, NULL, 10);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
data->in_min[nr] = IN_TO_REG(val);
it87_write_value(client, IT87_REG_VIN_MIN(nr),
data->in_min[nr]);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
struct it87_data *data = i2c_get_clientdata(client);
unsigned long val = simple_strtoul(buf, NULL, 10);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
data->in_max[nr] = IN_TO_REG(val);
it87_write_value(client, IT87_REG_VIN_MAX(nr),
data->in_max[nr]);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
struct it87_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
data->temp_high[nr] = TEMP_TO_REG(val);
it87_write_value(client, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
struct it87_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
data->temp_low[nr] = TEMP_TO_REG(val);
it87_write_value(client, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
#define show_temp_offset(offset) \
struct it87_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
data->sensor &= ~(1 << nr);
data->sensor &= ~(8 << nr);
else if (val == 2)
data->sensor |= 8 << nr;
else if (val != 0) {
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return -EINVAL;
}
it87_write_value(client, IT87_REG_TEMP_ENABLE, data->sensor);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
#define show_sensor_offset(offset) \
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
+ u8 reg = it87_read_value(client, IT87_REG_FAN_DIV);
+
+ mutex_lock(&data->update_lock);
+ switch (nr) {
+ case 0: data->fan_div[nr] = reg & 0x07; break;
+ case 1: data->fan_div[nr] = (reg >> 3) & 0x07; break;
+ case 2: data->fan_div[nr] = (reg & 0x40) ? 3 : 1; break;
+ }
- down(&data->update_lock);
data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
it87_write_value(client, IT87_REG_FAN_MIN(nr), data->fan_min[nr]);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
int i, min[3];
u8 old;
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
old = it87_read_value(client, IT87_REG_FAN_DIV);
for (i = 0; i < 3; i++)
data->fan_min[i]=FAN_TO_REG(min[i], DIV_FROM_REG(data->fan_div[i]));
it87_write_value(client, IT87_REG_FAN_MIN(i), data->fan_min[i]);
}
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_pwm_enable(struct device *dev,
struct it87_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
if (val == 0) {
int tmp;
/* set saved pwm value, clear FAN_CTLX PWM mode bit */
it87_write_value(client, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
} else {
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return -EINVAL;
}
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
if (val < 0 || val > 255)
return -EINVAL;
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
data->manual_pwm_ctl[nr] = val;
if (data->fan_main_ctrl & (1 << nr))
it87_write_value(client, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
{
struct it87_data *data = it87_update_device(dev);
- return sprintf(buf, "%ld\n", (long) data->vrm);
+ return sprintf(buf, "%u\n", data->vrm);
}
static ssize_t
store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
}
/* SuperIO detection - will change isa_address if a chip is found */
-static int __init it87_find(int *address)
+static int __init it87_find(unsigned short *address)
{
int err = -ENODEV;
}
/* This function is called by i2c_probe */
-int it87_detect(struct i2c_adapter *adapter, int address, int kind)
+static int it87_detect(struct i2c_adapter *adapter, int address, int kind)
{
int i;
struct i2c_client *new_client;
/* Reserve the ISA region */
if (is_isa)
- if (!request_region(address, IT87_EXTENT, it87_isa_driver.name))
+ if (!request_region(address, IT87_EXTENT,
+ it87_isa_driver.driver.name))
goto ERROR0;
- /* Probe whether there is anything available on this address. Already
- done for SMBus and Super-I/O clients */
- if (kind < 0) {
- if (is_isa && !chip_type) {
-#define REALLY_SLOW_IO
- /* We need the timeouts for at least some IT87-like chips. But only
- if we read 'undefined' registers. */
- i = inb_p(address + 1);
- if (inb_p(address + 2) != i
- || inb_p(address + 3) != i
- || inb_p(address + 7) != i) {
- err = -ENODEV;
- goto ERROR1;
- }
-#undef REALLY_SLOW_IO
-
- /* Let's just hope nothing breaks here */
- i = inb_p(address + 5) & 0x7f;
- outb_p(~i & 0x7f, address + 5);
- if ((inb_p(address + 5) & 0x7f) != (~i & 0x7f)) {
- outb_p(i, address + 5);
- err = -ENODEV;
- goto ERROR1;
- }
- }
- }
-
- /* OK. For now, we presume we have a valid client. We now create the
+ /* For now, we presume we have a valid client. We create the
client structure, even though we cannot fill it completely yet.
But it allows us to access it87_{read,write}_value. */
- if (!(data = kmalloc(sizeof(struct it87_data), GFP_KERNEL))) {
+ if (!(data = kzalloc(sizeof(struct it87_data), GFP_KERNEL))) {
err = -ENOMEM;
goto ERROR1;
}
- memset(data, 0, sizeof(struct it87_data));
new_client = &data->client;
if (is_isa)
- init_MUTEX(&data->lock);
+ mutex_init(&data->lock);
i2c_set_clientdata(new_client, data);
new_client->addr = address;
new_client->adapter = adapter;
strlcpy(new_client->name, name, I2C_NAME_SIZE);
data->type = kind;
data->valid = 0;
- init_MUTEX(&data->update_lock);
+ mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
goto ERROR2;
+ if (!is_isa)
+ dev_info(&new_client->dev, "The I2C interface to IT87xxF "
+ "hardware monitoring chips is deprecated. Please "
+ "report if you still rely on it.\n");
+
/* Check PWM configuration */
enable_pwm_interface = it87_check_pwm(new_client);
}
if (data->type == it8712) {
- data->vrm = i2c_which_vrm();
+ data->vrm = vid_which_vrm();
device_create_file_vrm(new_client);
device_create_file_vid(new_client);
}
int res;
if (i2c_is_isa_client(client)) {
- down(&data->lock);
+ mutex_lock(&data->lock);
outb_p(reg, client->addr + IT87_ADDR_REG_OFFSET);
res = inb_p(client->addr + IT87_DATA_REG_OFFSET);
- up(&data->lock);
+ mutex_unlock(&data->lock);
return res;
} else
return i2c_smbus_read_byte_data(client, reg);
struct it87_data *data = i2c_get_clientdata(client);
if (i2c_is_isa_client(client)) {
- down(&data->lock);
+ mutex_lock(&data->lock);
outb_p(reg, client->addr + IT87_ADDR_REG_OFFSET);
outb_p(value, client->addr + IT87_DATA_REG_OFFSET);
- up(&data->lock);
+ mutex_unlock(&data->lock);
return 0;
} else
return i2c_smbus_write_byte_data(client, reg, value);
struct it87_data *data = i2c_get_clientdata(client);
int i;
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|| !data->valid) {
data->valid = 1;
}
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return data;
}
static int __init sm_it87_init(void)
{
- int addr, res;
-
- if (!it87_find(&addr)) {
- isa_address = addr;
- }
+ int res;
res = i2c_add_driver(&it87_driver);
if (res)
return res;
- res = i2c_isa_add_driver(&it87_isa_driver);
- if (res) {
- i2c_del_driver(&it87_driver);
- return res;
+ if (!it87_find(&isa_address)) {
+ res = i2c_isa_add_driver(&it87_isa_driver);
+ if (res) {
+ i2c_del_driver(&it87_driver);
+ return res;
+ }
}
return 0;
static void __exit sm_it87_exit(void)
{
- i2c_isa_del_driver(&it87_isa_driver);
+ if (isa_address)
+ i2c_isa_del_driver(&it87_isa_driver);
i2c_del_driver(&it87_driver);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff