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linux/drivers/hwmon/it87.c
Guenter Roeck 3c4c497191 hwmon: (it87) Constify fixed string arrays 
Make checkpatch happy by constifying fixed string arrays.

Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jean Delvare <khali@linux-fr.org>
2012-03-18 18:26:58 -07:00

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/*
* it87.c - Part of lm_sensors, Linux kernel modules for hardware
* monitoring.
*
* The IT8705F is an LPC-based Super I/O part that contains UARTs, a
* parallel port, an IR port, a MIDI port, a floppy controller, etc., in
* addition to an Environment Controller (Enhanced Hardware Monitor and
* Fan Controller)
*
* This driver supports only the Environment Controller in the IT8705F and
* similar parts. The other devices are supported by different drivers.
*
* Supports: IT8705F Super I/O chip w/LPC interface
* IT8712F Super I/O chip w/LPC interface
* IT8716F Super I/O chip w/LPC interface
* IT8718F Super I/O chip w/LPC interface
* IT8720F Super I/O chip w/LPC interface
* IT8721F Super I/O chip w/LPC interface
* IT8726F Super I/O chip w/LPC interface
* IT8728F Super I/O chip w/LPC interface
* IT8758E Super I/O chip w/LPC interface
* Sis950 A clone of the IT8705F
*
* Copyright (C) 2001 Chris Gauthron
* Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org>
*
* 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/string.h>
#include <linux/dmi.h>
#include <linux/acpi.h>
#include <linux/io.h>
#define DRVNAME "it87"
enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728 };
static unsigned short force_id;
module_param(force_id, ushort, 0);
MODULE_PARM_DESC(force_id, "Override the detected device ID");
static struct platform_device *pdev;
#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 */
/* The device with the IT8718F/IT8720F VID value in it */
#define GPIO 0x07
#define DEVID 0x20 /* Register: Device ID */
#define DEVREV 0x22 /* Register: Device Revision */
static inline int superio_inb(int reg)
{
outb(reg, REG);
return inb(VAL);
}
static inline void superio_outb(int reg, int val)
{
outb(reg, REG);
outb(val, VAL);
}
static int superio_inw(int reg)
{
int val;
outb(reg++, REG);
val = inb(VAL) << 8;
outb(reg, REG);
val |= inb(VAL);
return val;
}
static inline void superio_select(int ldn)
{
outb(DEV, REG);
outb(ldn, VAL);
}
static inline int superio_enter(void)
{
/*
* Try to reserve REG and REG + 1 for exclusive access.
*/
if (!request_muxed_region(REG, 2, DRVNAME))
return -EBUSY;
outb(0x87, REG);
outb(0x01, REG);
outb(0x55, REG);
outb(0x55, REG);
return 0;
}
static inline void superio_exit(void)
{
outb(0x02, REG);
outb(0x02, VAL);
release_region(REG, 2);
}
/* Logical device 4 registers */
#define IT8712F_DEVID 0x8712
#define IT8705F_DEVID 0x8705
#define IT8716F_DEVID 0x8716
#define IT8718F_DEVID 0x8718
#define IT8720F_DEVID 0x8720
#define IT8721F_DEVID 0x8721
#define IT8726F_DEVID 0x8726
#define IT8728F_DEVID 0x8728
#define IT87_ACT_REG 0x30
#define IT87_BASE_REG 0x60
/* Logical device 7 registers (IT8712F and later) */
#define IT87_SIO_GPIO3_REG 0x27
#define IT87_SIO_GPIO5_REG 0x29
#define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
#define IT87_SIO_VID_REG 0xfc /* VID value */
#define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */
/* Update battery voltage after every reading if true */
static bool update_vbat;
/* Not all BIOSes properly configure the PWM registers */
static bool fix_pwm_polarity;
/* Many IT87 constants specified below */
/* Length of ISA address segment */
#define IT87_EXTENT 8
/* Length of ISA address segment for Environmental Controller */
#define IT87_EC_EXTENT 2
/* Offset of EC registers from ISA base address */
#define IT87_EC_OFFSET 5
/* Where are the ISA address/data registers relative to the EC base address */
#define IT87_ADDR_REG_OFFSET 0
#define IT87_DATA_REG_OFFSET 1
/*----- The IT87 registers -----*/
#define IT87_REG_CONFIG 0x00
#define IT87_REG_ALARM1 0x01
#define IT87_REG_ALARM2 0x02
#define IT87_REG_ALARM3 0x03
/*
* The IT8718F and IT8720F have the VID value in a different register, in
* Super-I/O configuration space.
*/
#define IT87_REG_VID 0x0a
/*
* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
* for fan divisors. Later IT8712F revisions must use 16-bit tachometer
* mode.
*/
#define IT87_REG_FAN_DIV 0x0b
#define IT87_REG_FAN_16BIT 0x0c
/* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 };
static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
#define IT87_REG_FAN_MAIN_CTRL 0x13
#define IT87_REG_FAN_CTL 0x14
#define IT87_REG_PWM(nr) (0x15 + (nr))
#define IT87_REG_PWM_DUTY(nr) (0x63 + (nr) * 8)
#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_VIN_ENABLE 0x50
#define IT87_REG_TEMP_ENABLE 0x51
#define IT87_REG_BEEP_ENABLE 0x5c
#define IT87_REG_CHIPID 0x58
#define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
#define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i))
struct it87_sio_data {
enum chips type;
/* Values read from Super-I/O config space */
u8 revision;
u8 vid_value;
u8 beep_pin;
u8 internal; /* Internal sensors can be labeled */
/* Features skipped based on config or DMI */
u8 skip_vid;
u8 skip_fan;
u8 skip_pwm;
};
/*
* For each registered chip, we need to keep some data in memory.
* The structure is dynamically allocated.
*/
struct it87_data {
struct device *hwmon_dev;
enum chips type;
u8 revision;
unsigned short addr;
const char *name;
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
u16 in_scaled; /* Internal voltage sensors are scaled */
u8 in[9]; /* Register value */
u8 in_max[8]; /* Register value */
u8 in_min[8]; /* Register value */
u8 has_fan; /* Bitfield, fans enabled */
u16 fan[5]; /* Register values, possibly combined */
u16 fan_min[5]; /* Register values, possibly combined */
s8 temp[3]; /* Register value */
s8 temp_high[3]; /* Register value */
s8 temp_low[3]; /* Register value */
u8 sensor; /* Register value */
u8 fan_div[3]; /* Register encoding, shifted right */
u8 vid; /* Register encoding, combined */
u8 vrm;
u32 alarms; /* Register encoding, combined */
u8 beeps; /* Register encoding */
u8 fan_main_ctrl; /* Register value */
u8 fan_ctl; /* Register value */
/*
* The following 3 arrays correspond to the same registers up to
* the IT8720F. The meaning of bits 6-0 depends on the value of bit
* 7, and we want to preserve settings on mode changes, so we have
* to track all values separately.
* Starting with the IT8721F, the manual PWM duty cycles are stored
* in separate registers (8-bit values), so the separate tracking
* is no longer needed, but it is still done to keep the driver
* simple.
*/
u8 pwm_ctrl[3]; /* Register value */
u8 pwm_duty[3]; /* Manual PWM value set by user */
u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */
/* Automatic fan speed control registers */
u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */
s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */
};
static inline int has_12mv_adc(const struct it87_data *data)
{
/*
* IT8721F and later have a 12 mV ADC, also with internal scaling
* on selected inputs.
*/
return data->type == it8721
|| data->type == it8728;
}
static inline int has_newer_autopwm(const struct it87_data *data)
{
/*
* IT8721F and later have separate registers for the temperature
* mapping and the manual duty cycle.
*/
return data->type == it8721
|| data->type == it8728;
}
static u8 in_to_reg(const struct it87_data *data, int nr, long val)
{
long lsb;
if (has_12mv_adc(data)) {
if (data->in_scaled & (1 << nr))
lsb = 24;
else
lsb = 12;
} else
lsb = 16;
val = DIV_ROUND_CLOSEST(val, lsb);
return SENSORS_LIMIT(val, 0, 255);
}
static int in_from_reg(const struct it87_data *data, int nr, int val)
{
if (has_12mv_adc(data)) {
if (data->in_scaled & (1 << nr))
return val * 24;
else
return val * 12;
} else
return val * 16;
}
static inline u8 FAN_TO_REG(long rpm, int div)
{
if (rpm == 0)
return 255;
rpm = SENSORS_LIMIT(rpm, 1, 1000000);
return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
254);
}
static inline u16 FAN16_TO_REG(long rpm)
{
if (rpm == 0)
return 0xffff;
return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
}
#define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
1350000 / ((val) * (div)))
/* The divider is fixed to 2 in 16-bit mode */
#define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
1350000 / ((val) * 2))
#define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \
((val) + 500) / 1000), -128, 127))
#define TEMP_FROM_REG(val) ((val) * 1000)
static u8 pwm_to_reg(const struct it87_data *data, long val)
{
if (has_newer_autopwm(data))
return val;
else
return val >> 1;
}
static int pwm_from_reg(const struct it87_data *data, u8 reg)
{
if (has_newer_autopwm(data))
return reg;
else
return (reg & 0x7f) << 1;
}
static int DIV_TO_REG(int val)
{
int answer = 0;
while (answer < 7 && (val >>= 1))
answer++;
return answer;
}
#define DIV_FROM_REG(val) (1 << (val))
static const unsigned int pwm_freq[8] = {
48000000 / 128,
24000000 / 128,
12000000 / 128,
8000000 / 128,
6000000 / 128,
3000000 / 128,
1500000 / 128,
750000 / 128,
};
static inline int has_16bit_fans(const struct it87_data *data)
{
/*
* IT8705F Datasheet 0.4.1, 3h == Version G.
* IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
* These are the first revisions with 16-bit tachometer support.
*/
return (data->type == it87 && data->revision >= 0x03)
|| (data->type == it8712 && data->revision >= 0x08)
|| data->type == it8716
|| data->type == it8718
|| data->type == it8720
|| data->type == it8721
|| data->type == it8728;
}
static inline int has_old_autopwm(const struct it87_data *data)
{
/*
* The old automatic fan speed control interface is implemented
* by IT8705F chips up to revision F and IT8712F chips up to
* revision G.
*/
return (data->type == it87 && data->revision < 0x03)
|| (data->type == it8712 && data->revision < 0x08);
}
static int it87_probe(struct platform_device *pdev);
static int __devexit it87_remove(struct platform_device *pdev);
static int it87_read_value(struct it87_data *data, u8 reg);
static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
static struct it87_data *it87_update_device(struct device *dev);
static int it87_check_pwm(struct device *dev);
static void it87_init_device(struct platform_device *pdev);
static struct platform_driver it87_driver = {
.driver = {
.owner = THIS_MODULE,
.name = DRVNAME,
},
.probe = it87_probe,
.remove = __devexit_p(it87_remove),
};
static ssize_t show_in(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr]));
}
static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_min[nr]));
}
static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_max[nr]));
}
static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = dev_get_drvdata(dev);
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
mutex_lock(&data->update_lock);
data->in_min[nr] = in_to_reg(data, nr, val);
it87_write_value(data, IT87_REG_VIN_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 *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = dev_get_drvdata(dev);
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
mutex_lock(&data->update_lock);
data->in_max[nr] = in_to_reg(data, nr, val);
it87_write_value(data, IT87_REG_VIN_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);
#define limit_in_offset(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);
limit_in_offset(0);
show_in_offset(1);
limit_in_offset(1);
show_in_offset(2);
limit_in_offset(2);
show_in_offset(3);
limit_in_offset(3);
show_in_offset(4);
limit_in_offset(4);
show_in_offset(5);
limit_in_offset(5);
show_in_offset(6);
limit_in_offset(6);
show_in_offset(7);
limit_in_offset(7);
show_in_offset(8);
/* 3 temperatures */
static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
}
static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
}
static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
}
static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = dev_get_drvdata(dev);
long val;
if (kstrtol(buf, 10, &val) < 0)
return -EINVAL;
mutex_lock(&data->update_lock);
data->temp_high[nr] = TEMP_TO_REG(val);
it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = dev_get_drvdata(dev);
long val;
if (kstrtol(buf, 10, &val) < 0)
return -EINVAL;
mutex_lock(&data->update_lock);
data->temp_low[nr] = TEMP_TO_REG(val);
it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
mutex_unlock(&data->update_lock);
return count;
}
#define show_temp_offset(offset) \
static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
show_temp, NULL, offset - 1); \
static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
show_temp_max, set_temp_max, offset - 1); \
static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
show_temp_min, set_temp_min, offset - 1);
show_temp_offset(1);
show_temp_offset(2);
show_temp_offset(3);
static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
u8 reg = data->sensor; /* In case value is updated while used */
if (reg & (1 << nr))
return sprintf(buf, "3\n"); /* thermal diode */
if (reg & (8 << nr))
return sprintf(buf, "4\n"); /* thermistor */
return sprintf(buf, "0\n"); /* disabled */
}
static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = dev_get_drvdata(dev);
long val;
u8 reg;
if (kstrtol(buf, 10, &val) < 0)
return -EINVAL;
reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
reg &= ~(1 << nr);
reg &= ~(8 << nr);
if (val == 2) { /* backwards compatibility */
dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
"instead\n");
val = 4;
}
/* 3 = thermal diode; 4 = thermistor; 0 = disabled */
if (val == 3)
reg |= 1 << nr;
else if (val == 4)
reg |= 8 << nr;
else if (val != 0)
return -EINVAL;
mutex_lock(&data->update_lock);
data->sensor = reg;
it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
data->valid = 0; /* Force cache refresh */
mutex_unlock(&data->update_lock);
return count;
}
#define show_sensor_offset(offset) \
static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
show_sensor, set_sensor, offset - 1);
show_sensor_offset(1);
show_sensor_offset(2);
show_sensor_offset(3);
/* 3 Fans */
static int pwm_mode(const struct it87_data *data, int nr)
{
int ctrl = data->fan_main_ctrl & (1 << nr);
if (ctrl == 0) /* Full speed */
return 0;
if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
return 2;
else /* Manual mode */
return 1;
}
static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
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])));
}
static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
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])));
}
static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
}
static ssize_t show_pwm_enable(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", pwm_mode(data, nr));
}
static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n",
pwm_from_reg(data, data->pwm_duty[nr]));
}
static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct it87_data *data = it87_update_device(dev);
int index = (data->fan_ctl >> 4) & 0x07;
return sprintf(buf, "%u\n", pwm_freq[index]);
}
static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = dev_get_drvdata(dev);
long val;
u8 reg;
if (kstrtol(buf, 10, &val) < 0)
return -EINVAL;
mutex_lock(&data->update_lock);
reg = it87_read_value(data, IT87_REG_FAN_DIV);
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;
}
data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = dev_get_drvdata(dev);
unsigned long val;
int min;
u8 old;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
mutex_lock(&data->update_lock);
old = it87_read_value(data, IT87_REG_FAN_DIV);
/* Save fan min limit */
min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
switch (nr) {
case 0:
case 1:
data->fan_div[nr] = DIV_TO_REG(val);
break;
case 2:
if (val < 8)
data->fan_div[nr] = 1;
else
data->fan_div[nr] = 3;
}
val = old & 0x80;
val |= (data->fan_div[0] & 0x07);
val |= (data->fan_div[1] & 0x07) << 3;
if (data->fan_div[2] == 3)
val |= 0x1 << 6;
it87_write_value(data, IT87_REG_FAN_DIV, val);
/* Restore fan min limit */
data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
/* Returns 0 if OK, -EINVAL otherwise */
static int check_trip_points(struct device *dev, int nr)
{
const struct it87_data *data = dev_get_drvdata(dev);
int i, err = 0;
if (has_old_autopwm(data)) {
for (i = 0; i < 3; i++) {
if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
err = -EINVAL;
}
for (i = 0; i < 2; i++) {
if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
err = -EINVAL;
}
}
if (err) {
dev_err(dev, "Inconsistent trip points, not switching to "
"automatic mode\n");
dev_err(dev, "Adjust the trip points and try again\n");
}
return err;
}
static ssize_t set_pwm_enable(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = dev_get_drvdata(dev);
long val;
if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2)
return -EINVAL;
/* Check trip points before switching to automatic mode */
if (val == 2) {
if (check_trip_points(dev, nr) < 0)
return -EINVAL;
}
mutex_lock(&data->update_lock);
if (val == 0) {
int tmp;
/* make sure the fan is on when in on/off mode */
tmp = it87_read_value(data, IT87_REG_FAN_CTL);
it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
/* set on/off mode */
data->fan_main_ctrl &= ~(1 << nr);
it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
data->fan_main_ctrl);
} else {
if (val == 1) /* Manual mode */
data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
data->pwm_temp_map[nr] :
data->pwm_duty[nr];
else /* Automatic mode */
data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
/* set SmartGuardian mode */
data->fan_main_ctrl |= (1 << nr);
it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
data->fan_main_ctrl);
}
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = dev_get_drvdata(dev);
long val;
if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
return -EINVAL;
mutex_lock(&data->update_lock);
if (has_newer_autopwm(data)) {
/*
* If we are in automatic mode, the PWM duty cycle register
* is read-only so we can't write the value.
*/
if (data->pwm_ctrl[nr] & 0x80) {
mutex_unlock(&data->update_lock);
return -EBUSY;
}
data->pwm_duty[nr] = pwm_to_reg(data, val);
it87_write_value(data, IT87_REG_PWM_DUTY(nr),
data->pwm_duty[nr]);
} else {
data->pwm_duty[nr] = pwm_to_reg(data, val);
/*
* If we are in manual mode, write the duty cycle immediately;
* otherwise, just store it for later use.
*/
if (!(data->pwm_ctrl[nr] & 0x80)) {
data->pwm_ctrl[nr] = data->pwm_duty[nr];
it87_write_value(data, IT87_REG_PWM(nr),
data->pwm_ctrl[nr]);
}
}
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_pwm_freq(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct it87_data *data = dev_get_drvdata(dev);
unsigned long val;
int i;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
/* Search for the nearest available frequency */
for (i = 0; i < 7; i++) {
if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
break;
}
mutex_lock(&data->update_lock);
data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
data->fan_ctl |= i << 4;
it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_pwm_temp_map(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
int map;
if (data->pwm_temp_map[nr] < 3)
map = 1 << data->pwm_temp_map[nr];
else
map = 0; /* Should never happen */
return sprintf(buf, "%d\n", map);
}
static ssize_t set_pwm_temp_map(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = dev_get_drvdata(dev);
long val;
u8 reg;
/*
* This check can go away if we ever support automatic fan speed
* control on newer chips.
*/
if (!has_old_autopwm(data)) {
dev_notice(dev, "Mapping change disabled for safety reasons\n");
return -EINVAL;
}
if (kstrtol(buf, 10, &val) < 0)
return -EINVAL;
switch (val) {
case (1 << 0):
reg = 0x00;
break;
case (1 << 1):
reg = 0x01;
break;
case (1 << 2):
reg = 0x02;
break;
default:
return -EINVAL;
}
mutex_lock(&data->update_lock);
data->pwm_temp_map[nr] = reg;
/*
* If we are in automatic mode, write the temp mapping immediately;
* otherwise, just store it for later use.
*/
if (data->pwm_ctrl[nr] & 0x80) {
data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
}
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_auto_pwm(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct it87_data *data = it87_update_device(dev);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int point = sensor_attr->index;
return sprintf(buf, "%d\n",
pwm_from_reg(data, data->auto_pwm[nr][point]));
}
static ssize_t set_auto_pwm(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct it87_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int point = sensor_attr->index;
long val;
if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
return -EINVAL;
mutex_lock(&data->update_lock);
data->auto_pwm[nr][point] = pwm_to_reg(data, val);
it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
data->auto_pwm[nr][point]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_auto_temp(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct it87_data *data = it87_update_device(dev);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int point = sensor_attr->index;
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
}
static ssize_t set_auto_temp(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct it87_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int point = sensor_attr->index;
long val;
if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
return -EINVAL;
mutex_lock(&data->update_lock);
data->auto_temp[nr][point] = TEMP_TO_REG(val);
it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
data->auto_temp[nr][point]);
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);
show_fan_offset(3);
#define show_pwm_offset(offset) \
static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
show_pwm_enable, set_pwm_enable, offset - 1); \
static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
show_pwm, set_pwm, offset - 1); \
static DEVICE_ATTR(pwm##offset##_freq, \
(offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \
static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \
S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
offset - 1); \
static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \
S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
offset - 1, 0); \
static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \
S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
offset - 1, 1); \
static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \
S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
offset - 1, 2); \
static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \
S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \
static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \
S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
offset - 1, 1); \
static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \
S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
offset - 1, 0); \
static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \
S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
offset - 1, 2); \
static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \
S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
offset - 1, 3); \
static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \
S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
offset - 1, 4);
show_pwm_offset(1);
show_pwm_offset(2);
show_pwm_offset(3);
/* A different set of callbacks for 16-bit fans */
static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
}
static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
}
static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = dev_get_drvdata(dev);
long val;
if (kstrtol(buf, 10, &val) < 0)
return -EINVAL;
mutex_lock(&data->update_lock);
data->fan_min[nr] = FAN16_TO_REG(val);
it87_write_value(data, IT87_REG_FAN_MIN[nr],
data->fan_min[nr] & 0xff);
it87_write_value(data, IT87_REG_FANX_MIN[nr],
data->fan_min[nr] >> 8);
mutex_unlock(&data->update_lock);
return count;
}
/*
* We want to use the same sysfs file names as 8-bit fans, but we need
* different variable names, so we have to use SENSOR_ATTR instead of
* SENSOR_DEVICE_ATTR.
*/
#define show_fan16_offset(offset) \
static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
= SENSOR_ATTR(fan##offset##_input, S_IRUGO, \
show_fan16, NULL, offset - 1); \
static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
= SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
show_fan16_min, set_fan16_min, offset - 1)
show_fan16_offset(1);
show_fan16_offset(2);
show_fan16_offset(3);
show_fan16_offset(4);
show_fan16_offset(5);
/* Alarms */
static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%u\n", data->alarms);
}
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
char *buf)
{
int bitnr = to_sensor_dev_attr(attr)->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
}
static ssize_t clear_intrusion(struct device *dev, struct device_attribute
*attr, const char *buf, size_t count)
{
struct it87_data *data = dev_get_drvdata(dev);
long val;
int config;
if (kstrtol(buf, 10, &val) < 0 || val != 0)
return -EINVAL;
mutex_lock(&data->update_lock);
config = it87_read_value(data, IT87_REG_CONFIG);
if (config < 0) {
count = config;
} else {
config |= 1 << 5;
it87_write_value(data, IT87_REG_CONFIG, config);
/* Invalidate cache to force re-read */
data->valid = 0;
}
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
show_alarm, clear_intrusion, 4);
static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
char *buf)
{
int bitnr = to_sensor_dev_attr(attr)->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
}
static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int bitnr = to_sensor_dev_attr(attr)->index;
struct it87_data *data = dev_get_drvdata(dev);
long val;
if (kstrtol(buf, 10, &val) < 0
|| (val != 0 && val != 1))
return -EINVAL;
mutex_lock(&data->update_lock);
data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
if (val)
data->beeps |= (1 << bitnr);
else
data->beeps &= ~(1 << bitnr);
it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
show_beep, set_beep, 1);
static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
/* fanX_beep writability is set later */
static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
show_beep, set_beep, 2);
static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct it87_data *data = dev_get_drvdata(dev);
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)
{
struct it87_data *data = dev_get_drvdata(dev);
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
data->vrm = val;
return count;
}
static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
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);
static ssize_t show_label(struct device *dev, struct device_attribute *attr,
char *buf)
{
static const char * const labels[] = {
"+5V",
"5VSB",
"Vbat",
};
static const char * const labels_it8721[] = {
"+3.3V",
"3VSB",
"Vbat",
};
struct it87_data *data = dev_get_drvdata(dev);
int nr = to_sensor_dev_attr(attr)->index;
return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr]
: labels[nr]);
}
static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
static ssize_t show_name(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct it87_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 *it87_attributes[] = {
&sensor_dev_attr_in0_input.dev_attr.attr,
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
&sensor_dev_attr_in3_input.dev_attr.attr,
&sensor_dev_attr_in4_input.dev_attr.attr,
&sensor_dev_attr_in5_input.dev_attr.attr,
&sensor_dev_attr_in6_input.dev_attr.attr,
&sensor_dev_attr_in7_input.dev_attr.attr,
&sensor_dev_attr_in8_input.dev_attr.attr,
&sensor_dev_attr_in0_min.dev_attr.attr,
&sensor_dev_attr_in1_min.dev_attr.attr,
&sensor_dev_attr_in2_min.dev_attr.attr,
&sensor_dev_attr_in3_min.dev_attr.attr,
&sensor_dev_attr_in4_min.dev_attr.attr,
&sensor_dev_attr_in5_min.dev_attr.attr,
&sensor_dev_attr_in6_min.dev_attr.attr,
&sensor_dev_attr_in7_min.dev_attr.attr,
&sensor_dev_attr_in0_max.dev_attr.attr,
&sensor_dev_attr_in1_max.dev_attr.attr,
&sensor_dev_attr_in2_max.dev_attr.attr,
&sensor_dev_attr_in3_max.dev_attr.attr,
&sensor_dev_attr_in4_max.dev_attr.attr,
&sensor_dev_attr_in5_max.dev_attr.attr,
&sensor_dev_attr_in6_max.dev_attr.attr,
&sensor_dev_attr_in7_max.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_in5_alarm.dev_attr.attr,
&sensor_dev_attr_in6_alarm.dev_attr.attr,
&sensor_dev_attr_in7_alarm.dev_attr.attr,
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp3_input.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
&sensor_dev_attr_temp3_max.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
&sensor_dev_attr_temp2_min.dev_attr.attr,
&sensor_dev_attr_temp3_min.dev_attr.attr,
&sensor_dev_attr_temp1_type.dev_attr.attr,
&sensor_dev_attr_temp2_type.dev_attr.attr,
&sensor_dev_attr_temp3_type.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_alarms.attr,
&sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
&dev_attr_name.attr,
NULL
};
static const struct attribute_group it87_group = {
.attrs = it87_attributes,
};
static struct attribute *it87_attributes_beep[] = {
&sensor_dev_attr_in0_beep.dev_attr.attr,
&sensor_dev_attr_in1_beep.dev_attr.attr,
&sensor_dev_attr_in2_beep.dev_attr.attr,
&sensor_dev_attr_in3_beep.dev_attr.attr,
&sensor_dev_attr_in4_beep.dev_attr.attr,
&sensor_dev_attr_in5_beep.dev_attr.attr,
&sensor_dev_attr_in6_beep.dev_attr.attr,
&sensor_dev_attr_in7_beep.dev_attr.attr,
&sensor_dev_attr_temp1_beep.dev_attr.attr,
&sensor_dev_attr_temp2_beep.dev_attr.attr,
&sensor_dev_attr_temp3_beep.dev_attr.attr,
NULL
};
static const struct attribute_group it87_group_beep = {
.attrs = it87_attributes_beep,
};
static struct attribute *it87_attributes_fan16[5][3+1] = { {
&sensor_dev_attr_fan1_input16.dev_attr.attr,
&sensor_dev_attr_fan1_min16.dev_attr.attr,
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_fan2_input16.dev_attr.attr,
&sensor_dev_attr_fan2_min16.dev_attr.attr,
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_fan3_input16.dev_attr.attr,
&sensor_dev_attr_fan3_min16.dev_attr.attr,
&sensor_dev_attr_fan3_alarm.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_fan4_input16.dev_attr.attr,
&sensor_dev_attr_fan4_min16.dev_attr.attr,
&sensor_dev_attr_fan4_alarm.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_fan5_input16.dev_attr.attr,
&sensor_dev_attr_fan5_min16.dev_attr.attr,
&sensor_dev_attr_fan5_alarm.dev_attr.attr,
NULL
} };
static const struct attribute_group it87_group_fan16[5] = {
{ .attrs = it87_attributes_fan16[0] },
{ .attrs = it87_attributes_fan16[1] },
{ .attrs = it87_attributes_fan16[2] },
{ .attrs = it87_attributes_fan16[3] },
{ .attrs = it87_attributes_fan16[4] },
};
static struct attribute *it87_attributes_fan[3][4+1] = { {
&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,
NULL
}, {
&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,
NULL
}, {
&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_fan3_alarm.dev_attr.attr,
NULL
} };
static const struct attribute_group it87_group_fan[3] = {
{ .attrs = it87_attributes_fan[0] },
{ .attrs = it87_attributes_fan[1] },
{ .attrs = it87_attributes_fan[2] },
};
static const struct attribute_group *
it87_get_fan_group(const struct it87_data *data)
{
return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
}
static struct attribute *it87_attributes_pwm[3][4+1] = { {
&sensor_dev_attr_pwm1_enable.dev_attr.attr,
&sensor_dev_attr_pwm1.dev_attr.attr,
&dev_attr_pwm1_freq.attr,
&sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_pwm2_enable.dev_attr.attr,
&sensor_dev_attr_pwm2.dev_attr.attr,
&dev_attr_pwm2_freq.attr,
&sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_pwm3_enable.dev_attr.attr,
&sensor_dev_attr_pwm3.dev_attr.attr,
&dev_attr_pwm3_freq.attr,
&sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
NULL
} };
static const struct attribute_group it87_group_pwm[3] = {
{ .attrs = it87_attributes_pwm[0] },
{ .attrs = it87_attributes_pwm[1] },
{ .attrs = it87_attributes_pwm[2] },
};
static struct attribute *it87_attributes_autopwm[3][9+1] = { {
&sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
NULL
} };
static const struct attribute_group it87_group_autopwm[3] = {
{ .attrs = it87_attributes_autopwm[0] },
{ .attrs = it87_attributes_autopwm[1] },
{ .attrs = it87_attributes_autopwm[2] },
};
static struct attribute *it87_attributes_fan_beep[] = {
&sensor_dev_attr_fan1_beep.dev_attr.attr,
&sensor_dev_attr_fan2_beep.dev_attr.attr,
&sensor_dev_attr_fan3_beep.dev_attr.attr,
&sensor_dev_attr_fan4_beep.dev_attr.attr,
&sensor_dev_attr_fan5_beep.dev_attr.attr,
};
static struct attribute *it87_attributes_vid[] = {
&dev_attr_vrm.attr,
&dev_attr_cpu0_vid.attr,
NULL
};
static const struct attribute_group it87_group_vid = {
.attrs = it87_attributes_vid,
};
static struct attribute *it87_attributes_label[] = {
&sensor_dev_attr_in3_label.dev_attr.attr,
&sensor_dev_attr_in7_label.dev_attr.attr,
&sensor_dev_attr_in8_label.dev_attr.attr,
NULL
};
static const struct attribute_group it87_group_label = {
.attrs = it87_attributes_label,
};
/* SuperIO detection - will change isa_address if a chip is found */
static int __init it87_find(unsigned short *address,
struct it87_sio_data *sio_data)
{
int err;
u16 chip_type;
const char *board_vendor, *board_name;
err = superio_enter();
if (err)
return err;
err = -ENODEV;
chip_type = force_id ? force_id : superio_inw(DEVID);
switch (chip_type) {
case IT8705F_DEVID:
sio_data->type = it87;
break;
case IT8712F_DEVID:
sio_data->type = it8712;
break;
case IT8716F_DEVID:
case IT8726F_DEVID:
sio_data->type = it8716;
break;
case IT8718F_DEVID:
sio_data->type = it8718;
break;
case IT8720F_DEVID:
sio_data->type = it8720;
break;
case IT8721F_DEVID:
sio_data->type = it8721;
break;
case IT8728F_DEVID:
sio_data->type = it8728;
break;
case 0xffff: /* No device at all */
goto exit;
default:
pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
goto exit;
}
superio_select(PME);
if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
pr_info("Device not activated, skipping\n");
goto exit;
}
*address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
if (*address == 0) {
pr_info("Base address not set, skipping\n");
goto exit;
}
err = 0;
sio_data->revision = superio_inb(DEVREV) & 0x0f;
pr_info("Found IT%04xF chip at 0x%x, revision %d\n",
chip_type, *address, sio_data->revision);
/* in8 (Vbat) is always internal */
sio_data->internal = (1 << 2);
/* Read GPIO config and VID value from LDN 7 (GPIO) */
if (sio_data->type == it87) {
/* The IT8705F doesn't have VID pins at all */
sio_data->skip_vid = 1;
/* The IT8705F has a different LD number for GPIO */
superio_select(5);
sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
} else {
int reg;
superio_select(GPIO);
reg = superio_inb(IT87_SIO_GPIO3_REG);
if (sio_data->type == it8721 || sio_data->type == it8728) {
/*
* The IT8721F/IT8758E doesn't have VID pins at all,
* not sure about the IT8728F.
*/
sio_data->skip_vid = 1;
} else {
/* We need at least 4 VID pins */
if (reg & 0x0f) {
pr_info("VID is disabled (pins used for GPIO)\n");
sio_data->skip_vid = 1;
}
}
/* Check if fan3 is there or not */
if (reg & (1 << 6))
sio_data->skip_pwm |= (1 << 2);
if (reg & (1 << 7))
sio_data->skip_fan |= (1 << 2);
/* Check if fan2 is there or not */
reg = superio_inb(IT87_SIO_GPIO5_REG);
if (reg & (1 << 1))
sio_data->skip_pwm |= (1 << 1);
if (reg & (1 << 2))
sio_data->skip_fan |= (1 << 1);
if ((sio_data->type == it8718 || sio_data->type == it8720)
&& !(sio_data->skip_vid))
sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
reg = superio_inb(IT87_SIO_PINX2_REG);
/*
* The IT8720F has no VIN7 pin, so VCCH should always be
* routed internally to VIN7 with an internal divider.
* Curiously, there still is a configuration bit to control
* this, which means it can be set incorrectly. And even
* more curiously, many boards out there are improperly
* configured, even though the IT8720F datasheet claims
* that the internal routing of VCCH to VIN7 is the default
* setting. So we force the internal routing in this case.
*/
if (sio_data->type == it8720 && !(reg & (1 << 1))) {
reg |= (1 << 1);
superio_outb(IT87_SIO_PINX2_REG, reg);
pr_notice("Routing internal VCCH to in7\n");
}
if (reg & (1 << 0))
sio_data->internal |= (1 << 0);
if ((reg & (1 << 1)) || sio_data->type == it8721 ||
sio_data->type == it8728)
sio_data->internal |= (1 << 1);
sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
}
if (sio_data->beep_pin)
pr_info("Beeping is supported\n");
/* Disable specific features based on DMI strings */
board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
board_name = dmi_get_system_info(DMI_BOARD_NAME);
if (board_vendor && board_name) {
if (strcmp(board_vendor, "nVIDIA") == 0
&& strcmp(board_name, "FN68PT") == 0) {
/*
* On the Shuttle SN68PT, FAN_CTL2 is apparently not
* connected to a fan, but to something else. One user
* has reported instant system power-off when changing
* the PWM2 duty cycle, so we disable it.
* I use the board name string as the trigger in case
* the same board is ever used in other systems.
*/
pr_info("Disabling pwm2 due to hardware constraints\n");
sio_data->skip_pwm = (1 << 1);
}
}
exit:
superio_exit();
return err;
}
static void it87_remove_files(struct device *dev)
{
struct it87_data *data = platform_get_drvdata(pdev);
struct it87_sio_data *sio_data = dev->platform_data;
const struct attribute_group *fan_group = it87_get_fan_group(data);
int i;
sysfs_remove_group(&dev->kobj, &it87_group);
if (sio_data->beep_pin)
sysfs_remove_group(&dev->kobj, &it87_group_beep);
for (i = 0; i < 5; i++) {
if (!(data->has_fan & (1 << i)))
continue;
sysfs_remove_group(&dev->kobj, &fan_group[i]);
if (sio_data->beep_pin)
sysfs_remove_file(&dev->kobj,
it87_attributes_fan_beep[i]);
}
for (i = 0; i < 3; i++) {
if (sio_data->skip_pwm & (1 << 0))
continue;
sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
if (has_old_autopwm(data))
sysfs_remove_group(&dev->kobj,
&it87_group_autopwm[i]);
}
if (!sio_data->skip_vid)
sysfs_remove_group(&dev->kobj, &it87_group_vid);
sysfs_remove_group(&dev->kobj, &it87_group_label);
}
static int __devinit it87_probe(struct platform_device *pdev)
{
struct it87_data *data;
struct resource *res;
struct device *dev = &pdev->dev;
struct it87_sio_data *sio_data = dev->platform_data;
const struct attribute_group *fan_group;
int err = 0, i;
int enable_pwm_interface;
int fan_beep_need_rw;
static const char * const names[] = {
"it87",
"it8712",
"it8716",
"it8718",
"it8720",
"it8721",
"it8728",
};
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
(unsigned long)res->start,
(unsigned long)(res->start + IT87_EC_EXTENT - 1));
err = -EBUSY;
goto ERROR0;
}
data = kzalloc(sizeof(struct it87_data), GFP_KERNEL);
if (!data) {
err = -ENOMEM;
goto ERROR1;
}
data->addr = res->start;
data->type = sio_data->type;
data->revision = sio_data->revision;
data->name = names[sio_data->type];
/* Now, we do the remaining detection. */
if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
|| it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
err = -ENODEV;
goto ERROR2;
}
platform_set_drvdata(pdev, data);
mutex_init(&data->update_lock);
/* Check PWM configuration */
enable_pwm_interface = it87_check_pwm(dev);
/* Starting with IT8721F, we handle scaling of internal voltages */
if (has_12mv_adc(data)) {
if (sio_data->internal & (1 << 0))
data->in_scaled |= (1 << 3); /* in3 is AVCC */
if (sio_data->internal & (1 << 1))
data->in_scaled |= (1 << 7); /* in7 is VSB */
if (sio_data->internal & (1 << 2))
data->in_scaled |= (1 << 8); /* in8 is Vbat */
}
/* Initialize the IT87 chip */
it87_init_device(pdev);
/* Register sysfs hooks */
err = sysfs_create_group(&dev->kobj, &it87_group);
if (err)
goto ERROR2;
if (sio_data->beep_pin) {
err = sysfs_create_group(&dev->kobj, &it87_group_beep);
if (err)
goto ERROR4;
}
/* Do not create fan files for disabled fans */
fan_group = it87_get_fan_group(data);
fan_beep_need_rw = 1;
for (i = 0; i < 5; i++) {
if (!(data->has_fan & (1 << i)))
continue;
err = sysfs_create_group(&dev->kobj, &fan_group[i]);
if (err)
goto ERROR4;
if (sio_data->beep_pin) {
err = sysfs_create_file(&dev->kobj,
it87_attributes_fan_beep[i]);
if (err)
goto ERROR4;
if (!fan_beep_need_rw)
continue;
/*
* As we have a single beep enable bit for all fans,
* only the first enabled fan has a writable attribute
* for it.
*/
if (sysfs_chmod_file(&dev->kobj,
it87_attributes_fan_beep[i],
S_IRUGO | S_IWUSR))
dev_dbg(dev, "chmod +w fan%d_beep failed\n",
i + 1);
fan_beep_need_rw = 0;
}
}
if (enable_pwm_interface) {
for (i = 0; i < 3; i++) {
if (sio_data->skip_pwm & (1 << i))
continue;
err = sysfs_create_group(&dev->kobj,
&it87_group_pwm[i]);
if (err)
goto ERROR4;
if (!has_old_autopwm(data))
continue;
err = sysfs_create_group(&dev->kobj,
&it87_group_autopwm[i]);
if (err)
goto ERROR4;
}
}
if (!sio_data->skip_vid) {
data->vrm = vid_which_vrm();
/* VID reading from Super-I/O config space if available */
data->vid = sio_data->vid_value;
err = sysfs_create_group(&dev->kobj, &it87_group_vid);
if (err)
goto ERROR4;
}
/* Export labels for internal sensors */
for (i = 0; i < 3; i++) {
if (!(sio_data->internal & (1 << i)))
continue;
err = sysfs_create_file(&dev->kobj,
it87_attributes_label[i]);
if (err)
goto ERROR4;
}
data->hwmon_dev = hwmon_device_register(dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto ERROR4;
}
return 0;
ERROR4:
it87_remove_files(dev);
ERROR2:
platform_set_drvdata(pdev, NULL);
kfree(data);
ERROR1:
release_region(res->start, IT87_EC_EXTENT);
ERROR0:
return err;
}
static int __devexit it87_remove(struct platform_device *pdev)
{
struct it87_data *data = platform_get_drvdata(pdev);
hwmon_device_unregister(data->hwmon_dev);
it87_remove_files(&pdev->dev);
release_region(data->addr, IT87_EC_EXTENT);
platform_set_drvdata(pdev, NULL);
kfree(data);
return 0;
}
/*
* Must be called with data->update_lock held, except during initialization.
* 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.
*/
static int it87_read_value(struct it87_data *data, u8 reg)
{
outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
return inb_p(data->addr + IT87_DATA_REG_OFFSET);
}
/*
* Must be called with data->update_lock held, except during initialization.
* 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.
*/
static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
{
outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
}
/* Return 1 if and only if the PWM interface is safe to use */
static int __devinit it87_check_pwm(struct device *dev)
{
struct it87_data *data = dev_get_drvdata(dev);
/*
* 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.
*/
int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
if ((tmp & 0x87) == 0) {
if (fix_pwm_polarity) {
/*
* The user asks us to attempt a chip reconfiguration.
* This means switching to active high polarity and
* inverting all fan speed values.
*/
int i;
u8 pwm[3];
for (i = 0; i < 3; i++)
pwm[i] = it87_read_value(data,
IT87_REG_PWM(i));
/*
* If any fan is in automatic pwm mode, the polarity
* might be correct, as suspicious as it seems, so we
* better don't change anything (but still disable the
* PWM interface).
*/
if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
dev_info(dev, "Reconfiguring PWM to "
"active high polarity\n");
it87_write_value(data, IT87_REG_FAN_CTL,
tmp | 0x87);
for (i = 0; i < 3; i++)
it87_write_value(data,
IT87_REG_PWM(i),
0x7f & ~pwm[i]);
return 1;
}
dev_info(dev, "PWM configuration is "
"too broken to be fixed\n");
}
dev_info(dev, "Detected broken BIOS "
"defaults, disabling PWM interface\n");
return 0;
} else if (fix_pwm_polarity) {
dev_info(dev, "PWM configuration looks "
"sane, won't touch\n");
}
return 1;
}
/* Called when we have found a new IT87. */
static void __devinit it87_init_device(struct platform_device *pdev)
{
struct it87_sio_data *sio_data = pdev->dev.platform_data;
struct it87_data *data = platform_get_drvdata(pdev);
int tmp, i;
u8 mask;
/*
* For each PWM channel:
* - If it is in automatic mode, setting to manual mode should set
* the fan to full speed by default.
* - If it is in manual mode, we need a mapping to temperature
* channels to use when later setting to automatic mode later.
* Use a 1:1 mapping by default (we are clueless.)
* In both cases, the value can (and should) be changed by the user
* prior to switching to a different mode.
* Note that this is no longer needed for the IT8721F and later, as
* these have separate registers for the temperature mapping and the
* manual duty cycle.
*/
for (i = 0; i < 3; i++) {
data->pwm_temp_map[i] = i;
data->pwm_duty[i] = 0x7f; /* Full speed */
data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */
}
/*
* Some chips seem to have default value 0xff for all limit
* registers. For low voltage limits it makes no sense and triggers
* alarms, so change to 0 instead. For high temperature limits, it
* means -1 degree C, which surprisingly doesn't trigger an alarm,
* but is still confusing, so change to 127 degrees C.
*/
for (i = 0; i < 8; i++) {
tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
if (tmp == 0xff)
it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
}
for (i = 0; i < 3; i++) {
tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
if (tmp == 0xff)
it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
}
/*
* Temperature channels are not forcibly enabled, as they can be
* set to two different sensor types and we can't guess which one
* is correct for a given system. These channels can be enabled at
* run-time through the temp{1-3}_type sysfs accessors if needed.
*/
/* Check if voltage monitors are reset manually or by some reason */
tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
if ((tmp & 0xff) == 0) {
/* Enable all voltage monitors */
it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
}
/* Check if tachometers are reset manually or by some reason */
mask = 0x70 & ~(sio_data->skip_fan << 4);
data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
if ((data->fan_main_ctrl & mask) == 0) {
/* Enable all fan tachometers */
data->fan_main_ctrl |= mask;
it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
data->fan_main_ctrl);
}
data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
/* Set tachometers to 16-bit mode if needed */
if (has_16bit_fans(data)) {
tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
if (~tmp & 0x07 & data->has_fan) {
dev_dbg(&pdev->dev,
"Setting fan1-3 to 16-bit mode\n");
it87_write_value(data, IT87_REG_FAN_16BIT,
tmp | 0x07);
}
/* IT8705F only supports three fans. */
if (data->type != it87) {
if (tmp & (1 << 4))
data->has_fan |= (1 << 3); /* fan4 enabled */
if (tmp & (1 << 5))
data->has_fan |= (1 << 4); /* fan5 enabled */
}
}
/* Fan input pins may be used for alternative functions */
data->has_fan &= ~sio_data->skip_fan;
/* Start monitoring */
it87_write_value(data, IT87_REG_CONFIG,
(it87_read_value(data, IT87_REG_CONFIG) & 0x36)
| (update_vbat ? 0x41 : 0x01));
}
static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
{
data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
if (has_newer_autopwm(data)) {
data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
data->pwm_duty[nr] = it87_read_value(data,
IT87_REG_PWM_DUTY(nr));
} else {
if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
else /* Manual mode */
data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
}
if (has_old_autopwm(data)) {
int i;
for (i = 0; i < 5 ; i++)
data->auto_temp[nr][i] = it87_read_value(data,
IT87_REG_AUTO_TEMP(nr, i));
for (i = 0; i < 3 ; i++)
data->auto_pwm[nr][i] = it87_read_value(data,
IT87_REG_AUTO_PWM(nr, i));
}
}
static struct it87_data *it87_update_device(struct device *dev)
{
struct it87_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) {
if (update_vbat) {
/*
* Cleared after each update, so reenable. Value
* returned by this read will be previous value
*/
it87_write_value(data, IT87_REG_CONFIG,
it87_read_value(data, IT87_REG_CONFIG) | 0x40);
}
for (i = 0; i <= 7; i++) {
data->in[i] =
it87_read_value(data, IT87_REG_VIN(i));
data->in_min[i] =
it87_read_value(data, IT87_REG_VIN_MIN(i));
data->in_max[i] =
it87_read_value(data, IT87_REG_VIN_MAX(i));
}
/* in8 (battery) has no limit registers */
data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
for (i = 0; i < 5; i++) {
/* Skip disabled fans */
if (!(data->has_fan & (1 << i)))
continue;
data->fan_min[i] =
it87_read_value(data, IT87_REG_FAN_MIN[i]);
data->fan[i] = it87_read_value(data,
IT87_REG_FAN[i]);
/* Add high byte if in 16-bit mode */
if (has_16bit_fans(data)) {
data->fan[i] |= it87_read_value(data,
IT87_REG_FANX[i]) << 8;
data->fan_min[i] |= it87_read_value(data,
IT87_REG_FANX_MIN[i]) << 8;
}
}
for (i = 0; i < 3; i++) {
data->temp[i] =
it87_read_value(data, IT87_REG_TEMP(i));
data->temp_high[i] =
it87_read_value(data, IT87_REG_TEMP_HIGH(i));
data->temp_low[i] =
it87_read_value(data, IT87_REG_TEMP_LOW(i));
}
/* Newer chips don't have clock dividers */
if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
i = it87_read_value(data, IT87_REG_FAN_DIV);
data->fan_div[0] = i & 0x07;
data->fan_div[1] = (i >> 3) & 0x07;
data->fan_div[2] = (i & 0x40) ? 3 : 1;
}
data->alarms =
it87_read_value(data, IT87_REG_ALARM1) |
(it87_read_value(data, IT87_REG_ALARM2) << 8) |
(it87_read_value(data, IT87_REG_ALARM3) << 16);
data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
data->fan_main_ctrl = it87_read_value(data,
IT87_REG_FAN_MAIN_CTRL);
data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
for (i = 0; i < 3; i++)
it87_update_pwm_ctrl(data, i);
data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
/*
* The IT8705F does not have VID capability.
* The IT8718F and later don't use IT87_REG_VID for the
* same purpose.
*/
if (data->type == it8712 || data->type == it8716) {
data->vid = it87_read_value(data, IT87_REG_VID);
/*
* The older IT8712F revisions had only 5 VID pins,
* but we assume it is always safe to read 6 bits.
*/
data->vid &= 0x3f;
}
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
static int __init it87_device_add(unsigned short address,
const struct it87_sio_data *sio_data)
{
struct resource res = {
.start = address + IT87_EC_OFFSET,
.end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
.name = DRVNAME,
.flags = IORESOURCE_IO,
};
int err;
err = acpi_check_resource_conflict(&res);
if (err)
goto exit;
pdev = platform_device_alloc(DRVNAME, 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_data(pdev, sio_data,
sizeof(struct it87_sio_data));
if (err) {
pr_err("Platform data allocation failed\n");
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 __init sm_it87_init(void)
{
int err;
unsigned short isa_address = 0;
struct it87_sio_data sio_data;
memset(&sio_data, 0, sizeof(struct it87_sio_data));
err = it87_find(&isa_address, &sio_data);
if (err)
return err;
err = platform_driver_register(&it87_driver);
if (err)
return err;
err = it87_device_add(isa_address, &sio_data);
if (err) {
platform_driver_unregister(&it87_driver);
return err;
}
return 0;
}
static void __exit sm_it87_exit(void)
{
platform_device_unregister(pdev);
platform_driver_unregister(&it87_driver);
}
MODULE_AUTHOR("Chris Gauthron, "
"Jean Delvare <khali@linux-fr.org>");
MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
module_param(update_vbat, bool, 0);
MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
module_param(fix_pwm_polarity, bool, 0);
MODULE_PARM_DESC(fix_pwm_polarity,
"Force PWM polarity to active high (DANGEROUS)");
MODULE_LICENSE("GPL");
module_init(sm_it87_init);
module_exit(sm_it87_exit);
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