it87.c - Part of lm_sensors, Linux kernel modules for hardware
monitoring.
- Supports: IT8705F Super I/O chip w/LPC interface
- IT8712F Super I/O chip w/LPC interface & SMbus
+ Supports: IT8705F Super I/O chip w/LPC interface & SMBus
+ IT8712F Super I/O chip w/LPC interface & SMBus
Sis950 A clone of the IT8705F
Copyright (C) 2001 Chris Gauthron <chrisg@0-in.com>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/i2c-sensor.h>
+#include <linux/i2c-vid.h>
#include <asm/io.h>
/* Addresses to scan */
-static unsigned short normal_i2c[] = { I2C_CLIENT_END };
-static unsigned short normal_i2c_range[] = { 0x20, 0x2f, I2C_CLIENT_END };
+static unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
+ 0x2e, 0x2f, I2C_CLIENT_END };
static unsigned int normal_isa[] = { 0x0290, I2C_CLIENT_ISA_END };
-static unsigned int normal_isa_range[] = { I2C_CLIENT_ISA_END };
/* Insmod parameters */
-SENSORS_INSMOD_1(it87);
+SENSORS_INSMOD_2(it87, it8712);
#define REG 0x2e /* The register to read/write */
#define DEV 0x07 /* Register: Logical device select */
#define VAL 0x2f /* The value to read/write */
#define PME 0x04 /* The device with the fan registers in it */
#define DEVID 0x20 /* Register: Device ID */
+#define DEVREV 0x22 /* Register: Device Revision */
-static inline void
-superio_outb(int reg, int val)
+static inline int
+superio_inb(int reg)
{
outb(reg, REG);
- outb(val, VAL);
+ return inb(VAL);
}
-static inline int
-superio_inb(int reg)
+static int superio_inw(int reg)
{
+ int val;
+ outb(reg++, REG);
+ val = inb(VAL) << 8;
outb(reg, REG);
- return inb(VAL);
+ val |= inb(VAL);
+ return val;
}
static inline void
outb(0x02, VAL);
}
-/* just IT8712F for now - this should be extended to support the other
- chips as well */
#define IT8712F_DEVID 0x8712
+#define IT8705F_DEVID 0x8705
#define IT87_ACT_REG 0x30
#define IT87_BASE_REG 0x60
/* Update battery voltage after every reading if true */
static int update_vbat;
-/* Reset the registers on init if true */
-static int reset;
+/* Chip Type */
+
+static u16 chip_type;
/* Many IT87 constants specified below */
#define IT87_REG_FAN(nr) (0x0d + (nr))
#define IT87_REG_FAN_MIN(nr) (0x10 + (nr))
-#define IT87_REG_FAN_CTRL 0x13
+#define IT87_REG_FAN_MAIN_CTRL 0x13
+#define IT87_REG_FAN_CTL 0x14
+#define IT87_REG_PWM(nr) (0x15 + (nr))
#define IT87_REG_VIN(nr) (0x20 + (nr))
#define IT87_REG_TEMP(nr) (0x29 + (nr))
#define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
#define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
-#define IT87_REG_TEMP_HIGH(nr) (0x40 + ((nr) * 2))
-#define IT87_REG_TEMP_LOW(nr) (0x41 + ((nr) * 2))
+#define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
+#define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
#define IT87_REG_I2C_ADDR 0x48
#define IT87_REG_CHIPID 0x58
-#define IN_TO_REG(val) (SENSORS_LIMIT((((val) * 10 + 8)/16),0,255))
-#define IN_FROM_REG(val) (((val) * 16) / 10)
+#define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255))
+#define IN_FROM_REG(val) ((val) * 16)
static inline u8 FAN_TO_REG(long rpm, int div)
{
#define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))
-#define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-5)/10):\
- ((val)+5)/10),0,255))
-#define TEMP_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*10)
+#define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\
+ ((val)+500)/1000),-128,127))
+#define TEMP_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
-#define VID_FROM_REG(val) ((val)==0x1f?0:(val)>=0x10?510-(val)*10:\
- 205-(val)*5)
#define ALARMS_FROM_REG(val) (val)
+#define PWM_TO_REG(val) ((val) >> 1)
+#define PWM_FROM_REG(val) (((val)&0x7f) << 1)
+
static int DIV_TO_REG(int val)
{
int answer = 0;
- while ((val >>= 1))
+ while ((val >>= 1) != 0)
answer++;
return answer;
}
u8 sensor; /* Register value */
u8 fan_div[3]; /* Register encoding, shifted right */
u8 vid; /* Register encoding, combined */
+ int vrm;
u32 alarms; /* Register encoding, combined */
+ u8 fan_main_ctrl; /* Register value */
+ u8 manual_pwm_ctl[3]; /* manual PWM value set by user */
};
.detach_client = it87_detach_client,
};
-static int it87_id = 0;
-
static ssize_t show_in(struct device *dev, char *buf, int nr)
{
struct it87_data *data = it87_update_device(dev);
- return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])*10 );
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
}
static ssize_t show_in_min(struct device *dev, char *buf, int nr)
{
struct it87_data *data = it87_update_device(dev);
- return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])*10 );
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
}
static ssize_t show_in_max(struct device *dev, char *buf, int nr)
{
struct it87_data *data = it87_update_device(dev);
- return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])*10 );
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
}
static ssize_t set_in_min(struct device *dev, const char *buf,
{
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
- unsigned long val = simple_strtoul(buf, NULL, 10)/10;
+ unsigned long val = simple_strtoul(buf, NULL, 10);
data->in_min[nr] = IN_TO_REG(val);
it87_write_value(client, IT87_REG_VIN_MIN(nr),
data->in_min[nr]);
{
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
- unsigned long val = simple_strtoul(buf, NULL, 10)/10;
+ unsigned long val = simple_strtoul(buf, NULL, 10);
data->in_max[nr] = IN_TO_REG(val);
it87_write_value(client, IT87_REG_VIN_MAX(nr),
data->in_max[nr]);
static ssize_t \
show_in##offset (struct device *dev, char *buf) \
{ \
- return show_in(dev, buf, 0x##offset); \
+ return show_in(dev, buf, offset); \
} \
-static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL)
+static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);
#define limit_in_offset(offset) \
static ssize_t \
show_in##offset##_min (struct device *dev, char *buf) \
{ \
- return show_in_min(dev, buf, 0x##offset); \
+ return show_in_min(dev, buf, offset); \
} \
static ssize_t \
show_in##offset##_max (struct device *dev, char *buf) \
{ \
- return show_in_max(dev, buf, 0x##offset); \
+ return show_in_max(dev, buf, offset); \
} \
static ssize_t set_in##offset##_min (struct device *dev, \
const char *buf, size_t count) \
{ \
- return set_in_min(dev, buf, count, 0x##offset); \
+ return set_in_min(dev, buf, count, offset); \
} \
static ssize_t set_in##offset##_max (struct device *dev, \
const char *buf, size_t count) \
{ \
- return set_in_max(dev, buf, count, 0x##offset); \
+ return set_in_max(dev, buf, count, offset); \
} \
static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
- show_in##offset##_min, set_in##offset##_min) \
+ show_in##offset##_min, set_in##offset##_min); \
static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
- show_in##offset##_max, set_in##offset##_max)
+ show_in##offset##_max, set_in##offset##_max);
show_in_offset(0);
limit_in_offset(0);
static ssize_t show_temp(struct device *dev, char *buf, int nr)
{
struct it87_data *data = it87_update_device(dev);
- return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])*100 );
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
}
static ssize_t show_temp_max(struct device *dev, char *buf, int nr)
{
struct it87_data *data = it87_update_device(dev);
- return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])*100);
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
}
static ssize_t show_temp_min(struct device *dev, char *buf, int nr)
{
struct it87_data *data = it87_update_device(dev);
- return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])*100);
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
}
static ssize_t set_temp_max(struct device *dev, const char *buf,
size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
- int val = simple_strtol(buf, NULL, 10)/100;
+ int val = simple_strtol(buf, NULL, 10);
data->temp_high[nr] = TEMP_TO_REG(val);
it87_write_value(client, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
return count;
{
struct i2c_client *client = to_i2c_client(dev);
struct it87_data *data = i2c_get_clientdata(client);
- int val = simple_strtol(buf, NULL, 10)/100;
+ int val = simple_strtol(buf, NULL, 10);
data->temp_low[nr] = TEMP_TO_REG(val);
it87_write_value(client, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
return count;
#define show_temp_offset(offset) \
static ssize_t show_temp_##offset (struct device *dev, char *buf) \
{ \
- return show_temp(dev, buf, 0x##offset - 1); \
+ return show_temp(dev, buf, offset - 1); \
} \
static ssize_t \
show_temp_##offset##_max (struct device *dev, char *buf) \
{ \
- return show_temp_max(dev, buf, 0x##offset - 1); \
+ return show_temp_max(dev, buf, offset - 1); \
} \
static ssize_t \
show_temp_##offset##_min (struct device *dev, char *buf) \
{ \
- return show_temp_min(dev, buf, 0x##offset - 1); \
+ return show_temp_min(dev, buf, offset - 1); \
} \
static ssize_t set_temp_##offset##_max (struct device *dev, \
const char *buf, size_t count) \
{ \
- return set_temp_max(dev, buf, count, 0x##offset - 1); \
+ return set_temp_max(dev, buf, count, offset - 1); \
} \
static ssize_t set_temp_##offset##_min (struct device *dev, \
const char *buf, size_t count) \
{ \
- return set_temp_min(dev, buf, count, 0x##offset - 1); \
+ return set_temp_min(dev, buf, count, offset - 1); \
} \
-static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, NULL) \
+static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, NULL); \
static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
- show_temp_##offset##_max, set_temp_##offset##_max) \
+ show_temp_##offset##_max, set_temp_##offset##_max); \
static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
- show_temp_##offset##_min, set_temp_##offset##_min)
+ show_temp_##offset##_min, set_temp_##offset##_min);
show_temp_offset(1);
show_temp_offset(2);
#define show_sensor_offset(offset) \
static ssize_t show_sensor_##offset (struct device *dev, char *buf) \
{ \
- return show_sensor(dev, buf, 0x##offset - 1); \
+ return show_sensor(dev, buf, offset - 1); \
} \
static ssize_t set_sensor_##offset (struct device *dev, \
const char *buf, size_t count) \
{ \
- return set_sensor(dev, buf, count, 0x##offset - 1); \
+ return set_sensor(dev, buf, count, offset - 1); \
} \
-static DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
- show_sensor_##offset, set_sensor_##offset)
+static DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
+ show_sensor_##offset, set_sensor_##offset);
show_sensor_offset(1);
show_sensor_offset(2);
{
struct it87_data *data = it87_update_device(dev);
return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr],
- DIV_FROM_REG(data->fan_div[nr])) );
+ DIV_FROM_REG(data->fan_div[nr])));
}
static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
{
struct it87_data *data = it87_update_device(dev);
return sprintf(buf,"%d\n",
- FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])) );
+ FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])));
}
static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
{
struct it87_data *data = it87_update_device(dev);
- return sprintf(buf,"%d\n", DIV_FROM_REG(data->fan_div[nr]) );
+ return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
+}
+static ssize_t show_pwm_enable(struct device *dev, char *buf, int nr)
+{
+ struct it87_data *data = it87_update_device(dev);
+ return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0);
+}
+static ssize_t show_pwm(struct device *dev, char *buf, int nr)
+{
+ struct it87_data *data = it87_update_device(dev);
+ return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]);
}
static ssize_t set_fan_min(struct device *dev, const char *buf,
size_t count, int nr)
else
data->fan_div[nr] = 3;
}
- val = old & 0x100;
+ val = old & 0x80;
val |= (data->fan_div[0] & 0x07);
val |= (data->fan_div[1] & 0x07) << 3;
if (data->fan_div[2] == 3)
}
return count;
}
+static ssize_t set_pwm_enable(struct device *dev, const char *buf,
+ size_t count, int nr)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct it87_data *data = i2c_get_clientdata(client);
+ int val = simple_strtol(buf, NULL, 10);
+
+ if (val == 0) {
+ int tmp;
+ /* make sure the fan is on when in on/off mode */
+ tmp = it87_read_value(client, IT87_REG_FAN_CTL);
+ it87_write_value(client, IT87_REG_FAN_CTL, tmp | (1 << nr));
+ /* set on/off mode */
+ data->fan_main_ctrl &= ~(1 << nr);
+ it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
+ } else if (val == 1) {
+ /* set SmartGuardian mode */
+ data->fan_main_ctrl |= (1 << nr);
+ it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
+ /* 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
+ return -EINVAL;
+
+ return count;
+}
+static ssize_t set_pwm(struct device *dev, const char *buf,
+ size_t count, int nr)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct it87_data *data = i2c_get_clientdata(client);
+ int val = simple_strtol(buf, NULL, 10);
+
+ if (val < 0 || val > 255)
+ return -EINVAL;
+
+ 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]));
+
+ return count;
+}
#define show_fan_offset(offset) \
static ssize_t show_fan_##offset (struct device *dev, char *buf) \
{ \
- return show_fan(dev, buf, 0x##offset - 1); \
+ return show_fan(dev, buf, offset - 1); \
} \
static ssize_t show_fan_##offset##_min (struct device *dev, char *buf) \
{ \
- return show_fan_min(dev, buf, 0x##offset - 1); \
+ return show_fan_min(dev, buf, offset - 1); \
} \
static ssize_t show_fan_##offset##_div (struct device *dev, char *buf) \
{ \
- return show_fan_div(dev, buf, 0x##offset - 1); \
+ return show_fan_div(dev, buf, offset - 1); \
} \
static ssize_t set_fan_##offset##_min (struct device *dev, \
const char *buf, size_t count) \
{ \
- return set_fan_min(dev, buf, count, 0x##offset - 1); \
+ return set_fan_min(dev, buf, count, offset - 1); \
} \
static ssize_t set_fan_##offset##_div (struct device *dev, \
const char *buf, size_t count) \
{ \
- return set_fan_div(dev, buf, count, 0x##offset - 1); \
+ return set_fan_div(dev, buf, count, offset - 1); \
} \
-static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL) \
+static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL); \
static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
- show_fan_##offset##_min, set_fan_##offset##_min) \
+ show_fan_##offset##_min, set_fan_##offset##_min); \
static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
- show_fan_##offset##_div, set_fan_##offset##_div)
+ show_fan_##offset##_div, set_fan_##offset##_div);
show_fan_offset(1);
show_fan_offset(2);
show_fan_offset(3);
+#define show_pwm_offset(offset) \
+static ssize_t show_pwm##offset##_enable (struct device *dev, \
+ char *buf) \
+{ \
+ return show_pwm_enable(dev, buf, offset - 1); \
+} \
+static ssize_t show_pwm##offset (struct device *dev, char *buf) \
+{ \
+ return show_pwm(dev, buf, offset - 1); \
+} \
+static ssize_t set_pwm##offset##_enable (struct device *dev, \
+ const char *buf, size_t count) \
+{ \
+ return set_pwm_enable(dev, buf, count, offset - 1); \
+} \
+static ssize_t set_pwm##offset (struct device *dev, \
+ const char *buf, size_t count) \
+{ \
+ return set_pwm(dev, buf, count, offset - 1); \
+} \
+static DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
+ show_pwm##offset##_enable, \
+ set_pwm##offset##_enable); \
+static DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
+ show_pwm##offset , set_pwm##offset );
+
+show_pwm_offset(1);
+show_pwm_offset(2);
+show_pwm_offset(3);
+
/* Alarms */
static ssize_t show_alarms(struct device *dev, char *buf)
{
struct it87_data *data = it87_update_device(dev);
return sprintf(buf,"%d\n", ALARMS_FROM_REG(data->alarms));
}
-static DEVICE_ATTR(alarms, S_IRUGO | S_IWUSR, show_alarms, NULL);
+static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+
+static ssize_t
+show_vrm_reg(struct device *dev, char *buf)
+{
+ struct it87_data *data = it87_update_device(dev);
+ return sprintf(buf, "%ld\n", (long) data->vrm);
+}
+static ssize_t
+store_vrm_reg(struct device *dev, const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct it87_data *data = i2c_get_clientdata(client);
+ u32 val;
+
+ val = simple_strtoul(buf, NULL, 10);
+ data->vrm = val;
+
+ return count;
+}
+static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
+#define device_create_file_vrm(client) \
+device_create_file(&client->dev, &dev_attr_vrm)
+
+static ssize_t
+show_vid_reg(struct device *dev, char *buf)
+{
+ struct it87_data *data = it87_update_device(dev);
+ return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
+}
+static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
+#define device_create_file_vid(client) \
+device_create_file(&client->dev, &dev_attr_cpu0_vid)
/* This function is called when:
* it87_driver is inserted (when this module is loaded), for each
/* SuperIO detection - will change normal_isa[0] if a chip is found */
static int it87_find(int *address)
{
- u16 val;
+ int err = -ENODEV;
superio_enter();
- val = (superio_inb(DEVID) << 8) |
- superio_inb(DEVID + 1);
- if (val != IT8712F_DEVID) {
- superio_exit();
- return -ENODEV;
- }
+ chip_type = superio_inw(DEVID);
+ if (chip_type != IT8712F_DEVID
+ && chip_type != IT8705F_DEVID)
+ goto exit;
superio_select();
- val = (superio_inb(IT87_BASE_REG) << 8) |
- superio_inb(IT87_BASE_REG + 1);
- superio_exit();
- *address = val & ~(IT87_EXTENT - 1);
+ if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
+ pr_info("it87: Device not activated, skipping\n");
+ goto exit;
+ }
+
+ *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
if (*address == 0) {
- return -ENODEV;
+ pr_info("it87: Base address not set, skipping\n");
+ goto exit;
}
- return 0;
+
+ err = 0;
+ pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
+ chip_type, *address, superio_inb(DEVREV) & 0x0f);
+
+exit:
+ superio_exit();
+ return err;
}
/* This function is called by i2c_detect */
int err = 0;
const char *name = "";
int is_isa = i2c_is_isa_adapter(adapter);
+ int enable_pwm_interface;
+ int tmp;
if (!is_isa &&
!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
/* Reserve the ISA region */
if (is_isa)
- if (!request_region(address, IT87_EXTENT, name))
+ if (!request_region(address, IT87_EXTENT, it87_driver.name))
goto ERROR0;
/* Probe whether there is anything available on this address. Already
i = it87_read_value(new_client, IT87_REG_CHIPID);
if (i == 0x90) {
kind = it87;
+ if ((is_isa) && (chip_type == IT8712F_DEVID))
+ kind = it8712;
}
else {
if (kind == 0)
if (kind == it87) {
name = "it87";
+ } else if (kind == it8712) {
+ name = "it8712";
}
/* Fill in the remaining client fields and put it into the global list */
strlcpy(new_client->name, name, I2C_NAME_SIZE);
-
data->type = kind;
-
- new_client->id = it87_id++;
data->valid = 0;
init_MUTEX(&data->update_lock);
/* Initialize the IT87 chip */
it87_init_client(new_client, data);
+ /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
+ * and polarity set to active low is sign that this is the case so we
+ * disable pwm control to protect the user. */
+ enable_pwm_interface = 1;
+ tmp = it87_read_value(new_client, IT87_REG_FAN_CTL);
+ if ((tmp & 0x87) == 0) {
+ enable_pwm_interface = 0;
+ dev_info(&new_client->dev,
+ "detected broken BIOS defaults, disabling pwm interface");
+ }
+
/* Register sysfs hooks */
device_create_file(&new_client->dev, &dev_attr_in0_input);
device_create_file(&new_client->dev, &dev_attr_in1_input);
device_create_file(&new_client->dev, &dev_attr_fan2_div);
device_create_file(&new_client->dev, &dev_attr_fan3_div);
device_create_file(&new_client->dev, &dev_attr_alarms);
+ if (enable_pwm_interface) {
+ device_create_file(&new_client->dev, &dev_attr_pwm1_enable);
+ device_create_file(&new_client->dev, &dev_attr_pwm2_enable);
+ device_create_file(&new_client->dev, &dev_attr_pwm3_enable);
+ device_create_file(&new_client->dev, &dev_attr_pwm1);
+ device_create_file(&new_client->dev, &dev_attr_pwm2);
+ device_create_file(&new_client->dev, &dev_attr_pwm3);
+ }
+
+ if (data->type == it8712) {
+ device_create_file_vrm(new_client);
+ device_create_file_vid(new_client);
+ data->vrm = i2c_which_vrm();
+ }
return 0;
We don't want to lock the whole ISA bus, so we lock each client
separately.
We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
- would slow down the IT87 access and should not be necessary.
- There are some ugly typecasts here, but the good new is - they should
- nowhere else be necessary! */
+ would slow down the IT87 access and should not be necessary. */
static int it87_read_value(struct i2c_client *client, u8 reg)
{
struct it87_data *data = i2c_get_clientdata(client);
We don't want to lock the whole ISA bus, so we lock each client
separately.
We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
- would slow down the IT87 access and should not be necessary.
- There are some ugly typecasts here, but the good new is - they should
- nowhere else be necessary! */
+ would slow down the IT87 access and should not be necessary. */
static int it87_write_value(struct i2c_client *client, u8 reg, u8 value)
{
struct it87_data *data = i2c_get_clientdata(client);
/* Called when we have found a new IT87. */
static void it87_init_client(struct i2c_client *client, struct it87_data *data)
{
- int tmp;
-
- if (reset) {
- /* Reset all except Watchdog values and last conversion values
- This sets fan-divs to 2, among others */
- it87_write_value(client, IT87_REG_CONFIG, 0x80);
+ int tmp, i;
+
+ /* initialize to sane defaults:
+ * - if the chip is in manual pwm mode, this will be overwritten with
+ * the actual settings on the chip (so in this case, initialization
+ * is not needed)
+ * - if in automatic or on/off mode, we could switch to manual mode,
+ * read the registers and set manual_pwm_ctl accordingly, but currently
+ * this is not implemented, so we initialize to something sane */
+ for (i = 0; i < 3; i++) {
+ data->manual_pwm_ctl[i] = 0xff;
}
/* Check if temperature channnels are reset manually or by some reason */
}
/* Check if tachometers are reset manually or by some reason */
- tmp = it87_read_value(client, IT87_REG_FAN_CTRL);
- if ((tmp & 0x70) == 0) {
+ data->fan_main_ctrl = it87_read_value(client, IT87_REG_FAN_MAIN_CTRL);
+ if ((data->fan_main_ctrl & 0x70) == 0) {
/* Enable all fan tachometers */
- tmp = (tmp & 0x8f) | 0x70;
- it87_write_value(client, IT87_REG_FAN_CTRL, tmp);
+ data->fan_main_ctrl |= 0x70;
+ it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
}
+ /* Set current fan mode registers and the default settings for the
+ * other mode registers */
+ for (i = 0; i < 3; i++) {
+ if (data->fan_main_ctrl & (1 << i)) {
+ /* pwm mode */
+ tmp = it87_read_value(client, IT87_REG_PWM(i));
+ if (tmp & 0x80) {
+ /* automatic pwm - not yet implemented, but
+ * leave the settings made by the BIOS alone
+ * until a change is requested via the sysfs
+ * interface */
+ } else {
+ /* manual pwm */
+ data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp);
+ }
+ }
+ }
+
/* Start monitoring */
it87_write_value(client, IT87_REG_CONFIG,
(it87_read_value(client, IT87_REG_CONFIG) & 0x36)
it87_read_value(client, IT87_REG_ALARM1) |
(it87_read_value(client, IT87_REG_ALARM2) << 8) |
(it87_read_value(client, IT87_REG_ALARM3) << 16);
+ data->fan_main_ctrl = it87_read_value(client, IT87_REG_FAN_MAIN_CTRL);
data->sensor = it87_read_value(client, IT87_REG_TEMP_ENABLE);
-
+ /* The 8705 does not have VID capability */
+ if (data->type == it8712) {
+ data->vid = it87_read_value(client, IT87_REG_VID);
+ data->vid &= 0x1f;
+ }
data->last_updated = jiffies;
data->valid = 1;
}
MODULE_AUTHOR("Chris Gauthron <chrisg@0-in.com>");
MODULE_DESCRIPTION("IT8705F, IT8712F, Sis950 driver");
-MODULE_PARM(update_vbat, "i");
+module_param(update_vbat, bool, 0);
MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
-MODULE_PARM(reset, "i");
-MODULE_PARM_DESC(reset, "Reset the chip's registers, default no");
MODULE_LICENSE("GPL");
module_init(sm_it87_init);
git://git.onelab.eu / linux-2.6.git / blobdiff