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linux/drivers/hwmon/it87.c
Jean Delvare 41002f8dd5 hwmon: (it87) Preserve configuration register bits on init 
We were accidentally losing one bit in the configuration register on
device initialization. It was reported to freeze one specific system
right away. Properly preserve all bits we don't explicitly want to
change in order to prevent that.

Reported-by: Stevie Trujillo <stevie.trujillo@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
2012-07-12 22:47:37 +02:00

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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
* IT8782F Super I/O chip w/LPC interface
* IT8783E/F 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, it8782,
it8783 };
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 IT8782F_DEVID 0x8782
#define IT8783E_DEVID 0x8783
#define IT87_ACT_REG 0x30
#define IT87_BASE_REG 0x60
/* Logical device 7 registers (IT8712F and later) */
#define IT87_SIO_GPIO1_REG 0x25
#define IT87_SIO_GPIO3_REG 0x27
#define IT87_SIO_GPIO5_REG 0x29
#define IT87_SIO_PINX1_REG 0x2a /* Pin selection */
#define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
#define IT87_SIO_SPI_REG 0xef /* SPI function pin select */
#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_TEMP_EXTRA 0x55
#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 */
u16 skip_in;
u8 skip_vid;
u8 skip_fan;
u8 skip_pwm;
u8 skip_temp;
};
/*
* 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 */
u8 has_temp; /* Bitfield, temp sensors enabled */
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 int adc_lsb(const struct it87_data *data, int nr)
{
int lsb = has_12mv_adc(data) ? 12 : 16;
if (data->in_scaled & (1 << nr))
lsb <<= 1;
return lsb;
}
static u8 in_to_reg(const struct it87_data *data, int nr, long val)
{
val = DIV_ROUND_CLOSEST(val, adc_lsb(data, nr));
return SENSORS_LIMIT(val, 0, 255);
}
static int in_from_reg(const struct it87_data *data, int nr, int val)
{
return val * adc_lsb(data, nr);
}
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
|| data->type == it8782
|| data->type == it8783;
}
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_in[9][5] = {
{
&sensor_dev_attr_in0_input.dev_attr.attr,
&sensor_dev_attr_in0_min.dev_attr.attr,
&sensor_dev_attr_in0_max.dev_attr.attr,
&sensor_dev_attr_in0_alarm.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in1_min.dev_attr.attr,
&sensor_dev_attr_in1_max.dev_attr.attr,
&sensor_dev_attr_in1_alarm.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_in2_input.dev_attr.attr,
&sensor_dev_attr_in2_min.dev_attr.attr,
&sensor_dev_attr_in2_max.dev_attr.attr,
&sensor_dev_attr_in2_alarm.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_in3_input.dev_attr.attr,
&sensor_dev_attr_in3_min.dev_attr.attr,
&sensor_dev_attr_in3_max.dev_attr.attr,
&sensor_dev_attr_in3_alarm.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_in4_input.dev_attr.attr,
&sensor_dev_attr_in4_min.dev_attr.attr,
&sensor_dev_attr_in4_max.dev_attr.attr,
&sensor_dev_attr_in4_alarm.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_in5_input.dev_attr.attr,
&sensor_dev_attr_in5_min.dev_attr.attr,
&sensor_dev_attr_in5_max.dev_attr.attr,
&sensor_dev_attr_in5_alarm.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_in6_input.dev_attr.attr,
&sensor_dev_attr_in6_min.dev_attr.attr,
&sensor_dev_attr_in6_max.dev_attr.attr,
&sensor_dev_attr_in6_alarm.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_in7_input.dev_attr.attr,
&sensor_dev_attr_in7_min.dev_attr.attr,
&sensor_dev_attr_in7_max.dev_attr.attr,
&sensor_dev_attr_in7_alarm.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_in8_input.dev_attr.attr,
NULL
} };
static const struct attribute_group it87_group_in[9] = {
{ .attrs = it87_attributes_in[0] },
{ .attrs = it87_attributes_in[1] },
{ .attrs = it87_attributes_in[2] },
{ .attrs = it87_attributes_in[3] },
{ .attrs = it87_attributes_in[4] },
{ .attrs = it87_attributes_in[5] },
{ .attrs = it87_attributes_in[6] },
{ .attrs = it87_attributes_in[7] },
{ .attrs = it87_attributes_in[8] },
};
static struct attribute *it87_attributes_temp[3][6] = {
{
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
&sensor_dev_attr_temp1_type.dev_attr.attr,
&sensor_dev_attr_temp1_alarm.dev_attr.attr,
NULL
} , {
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
&sensor_dev_attr_temp2_min.dev_attr.attr,
&sensor_dev_attr_temp2_type.dev_attr.attr,
&sensor_dev_attr_temp2_alarm.dev_attr.attr,
NULL
} , {
&sensor_dev_attr_temp3_input.dev_attr.attr,
&sensor_dev_attr_temp3_max.dev_attr.attr,
&sensor_dev_attr_temp3_min.dev_attr.attr,
&sensor_dev_attr_temp3_type.dev_attr.attr,
&sensor_dev_attr_temp3_alarm.dev_attr.attr,
NULL
} };
static const struct attribute_group it87_group_temp[3] = {
{ .attrs = it87_attributes_temp[0] },
{ .attrs = it87_attributes_temp[1] },
{ .attrs = it87_attributes_temp[2] },
};
static struct attribute *it87_attributes[] = {
&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_in_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,
NULL
};
static struct attribute *it87_attributes_temp_beep[] = {
&sensor_dev_attr_temp1_beep.dev_attr.attr,
&sensor_dev_attr_temp2_beep.dev_attr.attr,
&sensor_dev_attr_temp3_beep.dev_attr.attr,
};
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 IT8782F_DEVID:
sio_data->type = it8782;
break;
case IT8783E_DEVID:
sio_data->type = it8783;
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 if (sio_data->type == it8783) {
int reg25, reg27, reg2A, reg2C, regEF;
sio_data->skip_vid = 1; /* No VID */
superio_select(GPIO);
reg25 = superio_inb(IT87_SIO_GPIO1_REG);
reg27 = superio_inb(IT87_SIO_GPIO3_REG);
reg2A = superio_inb(IT87_SIO_PINX1_REG);
reg2C = superio_inb(IT87_SIO_PINX2_REG);
regEF = superio_inb(IT87_SIO_SPI_REG);
/* Check if fan3 is there or not */
if ((reg27 & (1 << 0)) || !(reg2C & (1 << 2)))
sio_data->skip_fan |= (1 << 2);
if ((reg25 & (1 << 4))
|| (!(reg2A & (1 << 1)) && (regEF & (1 << 0))))
sio_data->skip_pwm |= (1 << 2);
/* Check if fan2 is there or not */
if (reg27 & (1 << 7))
sio_data->skip_fan |= (1 << 1);
if (reg27 & (1 << 3))
sio_data->skip_pwm |= (1 << 1);
/* VIN5 */
if ((reg27 & (1 << 0)) || (reg2C & (1 << 2)))
sio_data->skip_in |= (1 << 5); /* No VIN5 */
/* VIN6 */
if (reg27 & (1 << 1))
sio_data->skip_in |= (1 << 6); /* No VIN6 */
/*
* VIN7
* Does not depend on bit 2 of Reg2C, contrary to datasheet.
*/
if (reg27 & (1 << 2)) {
/*
* The data sheet is a bit unclear regarding the
* internal voltage divider for VCCH5V. It says
* "This bit enables and switches VIN7 (pin 91) to the
* internal voltage divider for VCCH5V".
* This is different to other chips, where the internal
* voltage divider would connect VIN7 to an internal
* voltage source. Maybe that is the case here as well.
*
* Since we don't know for sure, re-route it if that is
* not the case, and ask the user to report if the
* resulting voltage is sane.
*/
if (!(reg2C & (1 << 1))) {
reg2C |= (1 << 1);
superio_outb(IT87_SIO_PINX2_REG, reg2C);
pr_notice("Routing internal VCCH5V to in7.\n");
}
pr_notice("in7 routed to internal voltage divider, with external pin disabled.\n");
pr_notice("Please report if it displays a reasonable voltage.\n");
}
if (reg2C & (1 << 0))
sio_data->internal |= (1 << 0);
if (reg2C & (1 << 1))
sio_data->internal |= (1 << 1);
sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
} else {
int reg;
bool uart6;
superio_select(GPIO);
reg = superio_inb(IT87_SIO_GPIO3_REG);
if (sio_data->type == it8721 || sio_data->type == it8728 ||
sio_data->type == it8782) {
/*
* IT8721F/IT8758E, and IT8782F don'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);
uart6 = sio_data->type == it8782 && (reg & (1 << 2));
/*
* 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.
*
* On IT8782F, VIN7 is multiplexed with one of the UART6 pins.
* If UART6 is enabled, re-route VIN7 to the internal divider
* if that is not already the case.
*/
if ((sio_data->type == it8720 || uart6) && !(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);
/*
* On IT8782F, UART6 pins overlap with VIN5, VIN6, and VIN7.
* While VIN7 can be routed to the internal voltage divider,
* VIN5 and VIN6 are not available if UART6 is enabled.
*
* Also, temp3 is not available if UART6 is enabled and TEMPIN3
* is the temperature source. Since we can not read the
* temperature source here, skip_temp is preliminary.
*/
if (uart6) {
sio_data->skip_in |= (1 << 5) | (1 << 6);
sio_data->skip_temp |= (1 << 2);
}
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);
for (i = 0; i < 9; i++) {
if (sio_data->skip_in & (1 << i))
continue;
sysfs_remove_group(&dev->kobj, &it87_group_in[i]);
if (it87_attributes_in_beep[i])
sysfs_remove_file(&dev->kobj,
it87_attributes_in_beep[i]);
}
for (i = 0; i < 3; i++) {
if (!(data->has_temp & (1 << i)))
continue;
sysfs_remove_group(&dev->kobj, &it87_group_temp[i]);
if (sio_data->beep_pin)
sysfs_remove_file(&dev->kobj,
it87_attributes_temp_beep[i]);
}
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",
"it8782",
"it8783",
};
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!devm_request_region(&pdev->dev, 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));
return -EBUSY;
}
data = devm_kzalloc(&pdev->dev, sizeof(struct it87_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
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)
return -ENODEV;
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 */
} else if (sio_data->type == it8782 || sio_data->type == it8783) {
if (sio_data->internal & (1 << 0))
data->in_scaled |= (1 << 3); /* in3 is VCC5V */
if (sio_data->internal & (1 << 1))
data->in_scaled |= (1 << 7); /* in7 is VCCH5V */
}
data->has_temp = 0x07;
if (sio_data->skip_temp & (1 << 2)) {
if (sio_data->type == it8782
&& !(it87_read_value(data, IT87_REG_TEMP_EXTRA) & 0x80))
data->has_temp &= ~(1 << 2);
}
/* Initialize the IT87 chip */
it87_init_device(pdev);
/* Register sysfs hooks */
err = sysfs_create_group(&dev->kobj, &it87_group);
if (err)
return err;
for (i = 0; i < 9; i++) {
if (sio_data->skip_in & (1 << i))
continue;
err = sysfs_create_group(&dev->kobj, &it87_group_in[i]);
if (err)
goto error;
if (sio_data->beep_pin && it87_attributes_in_beep[i]) {
err = sysfs_create_file(&dev->kobj,
it87_attributes_in_beep[i]);
if (err)
goto error;
}
}
for (i = 0; i < 3; i++) {
if (!(data->has_temp & (1 << i)))
continue;
err = sysfs_create_group(&dev->kobj, &it87_group_temp[i]);
if (err)
goto error;
if (sio_data->beep_pin) {
err = sysfs_create_file(&dev->kobj,
it87_attributes_temp_beep[i]);
if (err)
goto error;
}
}
/* 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 error;
if (sio_data->beep_pin) {
err = sysfs_create_file(&dev->kobj,
it87_attributes_fan_beep[i]);
if (err)
goto error;
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 error;
if (!has_old_autopwm(data))
continue;
err = sysfs_create_group(&dev->kobj,
&it87_group_autopwm[i]);
if (err)
goto error;
}
}
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 error;
}
/* 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 error;
}
data->hwmon_dev = hwmon_device_register(dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto error;
}
return 0;
error:
it87_remove_files(dev);
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);
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, IT8782F, and IT8783E/F only support three fans. */
if (data->type != it87 && data->type != it8782 &&
data->type != it8783) {
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) & 0x3e)
| (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++) {
if (!(data->has_temp & (1 << i)))
continue;
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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