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it87.c
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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: IT8603E Super I/O chip w/LPC interface
* IT8623E Super I/O chip w/LPC interface
* 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
* IT8771E Super I/O chip w/LPC interface
* IT8772E 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 <jdelvare@suse.de>
*
* 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, it8771,
it8772, it8782, it8783, it8603 };
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 IT8771E_DEVID 0x8771
#define IT8772E_DEVID 0x8772
#define IT8782F_DEVID 0x8782
#define IT8783E_DEVID 0x8783
#define IT8603E_DEVID 0x8603
#define IT8623E_DEVID 0x8623
#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 };
static const u8 IT87_REG_TEMP_OFFSET[] = { 0x56, 0x57, 0x59 };
#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_devices {
const char *name;
u16 features;
u8 peci_mask;
u8 old_peci_mask;
};
#define FEAT_12MV_ADC (1 << 0)
#define FEAT_NEWER_AUTOPWM (1 << 1)
#define FEAT_OLD_AUTOPWM (1 << 2)
#define FEAT_16BIT_FANS (1 << 3)
#define FEAT_TEMP_OFFSET (1 << 4)
#define FEAT_TEMP_PECI (1 << 5)
#define FEAT_TEMP_OLD_PECI (1 << 6)
static const struct it87_devices it87_devices[] = {
[it87] = {
.name = "it87",
.features = FEAT_OLD_AUTOPWM, /* may need to overwrite */
},
[it8712] = {
.name = "it8712",
.features = FEAT_OLD_AUTOPWM, /* may need to overwrite */
},
[it8716] = {
.name = "it8716",
.features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET,
},
[it8718] = {
.name = "it8718",
.features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
| FEAT_TEMP_OLD_PECI,
.old_peci_mask = 0x4,
},
[it8720] = {
.name = "it8720",
.features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
| FEAT_TEMP_OLD_PECI,
.old_peci_mask = 0x4,
},
[it8721] = {
.name = "it8721",
.features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
| FEAT_TEMP_OFFSET | FEAT_TEMP_OLD_PECI | FEAT_TEMP_PECI,
.peci_mask = 0x05,
.old_peci_mask = 0x02, /* Actually reports PCH */
},
[it8728] = {
.name = "it8728",
.features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
| FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
.peci_mask = 0x07,
},
[it8771] = {
.name = "it8771",
.features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
| FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
/* PECI: guesswork */
/* 12mV ADC (OHM) */
/* 16 bit fans (OHM) */
.peci_mask = 0x07,
},
[it8772] = {
.name = "it8772",
.features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
| FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
/* PECI (coreboot) */
/* 12mV ADC (HWSensors4, OHM) */
/* 16 bit fans (HWSensors4, OHM) */
.peci_mask = 0x07,
},
[it8782] = {
.name = "it8782",
.features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
| FEAT_TEMP_OLD_PECI,
.old_peci_mask = 0x4,
},
[it8783] = {
.name = "it8783",
.features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
| FEAT_TEMP_OLD_PECI,
.old_peci_mask = 0x4,
},
[it8603] = {
.name = "it8603",
.features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
| FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
.peci_mask = 0x07,
},
};
#define has_16bit_fans(data) ((data)->features & FEAT_16BIT_FANS)
#define has_12mv_adc(data) ((data)->features & FEAT_12MV_ADC)
#define has_newer_autopwm(data) ((data)->features & FEAT_NEWER_AUTOPWM)
#define has_old_autopwm(data) ((data)->features & FEAT_OLD_AUTOPWM)
#define has_temp_offset(data) ((data)->features & FEAT_TEMP_OFFSET)
#define has_temp_peci(data, nr) (((data)->features & FEAT_TEMP_PECI) && \
((data)->peci_mask & (1 << nr)))
#define has_temp_old_peci(data, nr) \
(((data)->features & FEAT_TEMP_OLD_PECI) && \
((data)->old_peci_mask & (1 << nr)))
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;
u16 features;
u8 peci_mask;
u8 old_peci_mask;
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[10][3]; /* [nr][0]=in, [1]=min, [2]=max */
u8 has_fan; /* Bitfield, fans enabled */
u16 fan[5][2]; /* Register values, [nr][0]=fan, [1]=min */
u8 has_temp; /* Bitfield, temp sensors enabled */
s8 temp[3][4]; /* [nr][0]=temp, [1]=min, [2]=max, [3]=offset */
u8 sensor; /* Register value (IT87_REG_TEMP_ENABLE) */
u8 extra; /* Register value (IT87_REG_TEMP_EXTRA) */
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 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 clamp_val(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 = clamp_val(rpm, 1, 1000000);
return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
}
static inline u16 FAN16_TO_REG(long rpm)
{
if (rpm == 0)
return 0xffff;
return clamp_val((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) (clamp_val(((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 int it87_probe(struct platform_device *pdev);
static int 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 = it87_remove,
};
static ssize_t show_in(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
int nr = sattr->nr;
int index = sattr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr][index]));
}
static ssize_t set_in(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
int nr = sattr->nr;
int index = sattr->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[nr][index] = in_to_reg(data, nr, val);
it87_write_value(data,
index == 1 ? IT87_REG_VIN_MIN(nr)
: IT87_REG_VIN_MAX(nr),
data->in[nr][index]);
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, set_in,
0, 1);
static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, set_in,
0, 2);
static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_in, set_in,
1, 1);
static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_in, set_in,
1, 2);
static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, set_in,
2, 1);
static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, set_in,
2, 2);
static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, set_in,
3, 1);
static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, set_in,
3, 2);
static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, set_in,
4, 1);
static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, set_in,
4, 2);
static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 5, 0);
static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_in, set_in,
5, 1);
static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_in, set_in,
5, 2);
static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, 6, 0);
static SENSOR_DEVICE_ATTR_2(in6_min, S_IRUGO | S_IWUSR, show_in, set_in,
6, 1);
static SENSOR_DEVICE_ATTR_2(in6_max, S_IRUGO | S_IWUSR, show_in, set_in,
6, 2);
static SENSOR_DEVICE_ATTR_2(in7_input, S_IRUGO, show_in, NULL, 7, 0);
static SENSOR_DEVICE_ATTR_2(in7_min, S_IRUGO | S_IWUSR, show_in, set_in,
7, 1);
static SENSOR_DEVICE_ATTR_2(in7_max, S_IRUGO | S_IWUSR, show_in, set_in,
7, 2);
static SENSOR_DEVICE_ATTR_2(in8_input, S_IRUGO, show_in, NULL, 8, 0);
static SENSOR_DEVICE_ATTR_2(in9_input, S_IRUGO, show_in, NULL, 9, 0);
/* 3 temperatures */
static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
int nr = sattr->nr;
int index = sattr->index;
struct it87_data *data = it87_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
}
static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
int nr = sattr->nr;
int index = sattr->index;
struct it87_data *data = dev_get_drvdata(dev);
long val;
u8 reg, regval;
if (kstrtol(buf, 10, &val) < 0)
return -EINVAL;
mutex_lock(&data->update_lock);
switch (index) {
default:
case 1:
reg = IT87_REG_TEMP_LOW(nr);
break;
case 2:
reg = IT87_REG_TEMP_HIGH(nr);
break;
case 3:
regval = it87_read_value(data, IT87_REG_BEEP_ENABLE);
if (!(regval & 0x80)) {
regval |= 0x80;
it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
}
data->valid = 0;
reg = IT87_REG_TEMP_OFFSET[nr];
break;
}
data->temp[nr][index] = TEMP_TO_REG(val);
it87_write_value(data, reg, data->temp[nr][index]);
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
0, 1);
static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
0, 2);
static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
set_temp, 0, 3);
static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0);
static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
1, 1);
static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
1, 2);
static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
set_temp, 1, 3);
static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 2, 0);
static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
2, 1);
static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
2, 2);
static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
set_temp, 2, 3);
static ssize_t show_temp_type(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 */
u8 extra = data->extra;
if ((has_temp_peci(data, nr) && (reg >> 6 == nr + 1))
|| (has_temp_old_peci(data, nr) && (extra & 0x80)))
return sprintf(buf, "6\n"); /* Intel PECI */
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_temp_type(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, extra;
if (kstrtol(buf, 10, &val) < 0)
return -EINVAL;
reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
reg &= ~(1 << nr);
reg &= ~(8 << nr);
if (has_temp_peci(data, nr) && (reg >> 6 == nr + 1 || val == 6))
reg &= 0x3f;
extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
if (has_temp_old_peci(data, nr) && ((extra & 0x80) || val == 6))
extra &= 0x7f;
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; 6 = Intel PECI; 0 = disabled */
if (val == 3)
reg |= 1 << nr;
else if (val == 4)
reg |= 8 << nr;
else if (has_temp_peci(data, nr) && val == 6)
reg |= (nr + 1) << 6;
else if (has_temp_old_peci(data, nr) && val == 6)
extra |= 0x80;
else if (val != 0)
return -EINVAL;
mutex_lock(&data->update_lock);
data->sensor = reg;
data->extra = extra;
it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
if (has_temp_old_peci(data, nr))
it87_write_value(data, IT87_REG_TEMP_EXTRA, data->extra);
data->valid = 0; /* Force cache refresh */
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, show_temp_type,
set_temp_type, 0);
static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, show_temp_type,
set_temp_type, 1);
static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_temp_type,
set_temp_type, 2);
/* 3 Fans */
static int pwm_mode(const struct it87_data *data, int nr)
{
int ctrl = data->fan_main_ctrl & (1 << nr);
if (ctrl == 0 && data->type != it8603) /* 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_2 *sattr = to_sensor_dev_attr_2(attr);
int nr = sattr->nr;
int index = sattr->index;
int speed;
struct it87_data *data = it87_update_device(dev);
speed = has_16bit_fans(data) ?
FAN16_FROM_REG(data->fan[nr][index]) :
FAN_FROM_REG(data->fan[nr][index],
DIV_FROM_REG(data->fan_div[nr]));
return sprintf(buf, "%d\n", speed);
}
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(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
int nr = sattr->nr;
int index = sattr->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);
if (has_16bit_fans(data)) {
data->fan[nr][index] = FAN16_TO_REG(val);
it87_write_value(data, IT87_REG_FAN_MIN[nr],
data->fan[nr][index] & 0xff);
it87_write_value(data, IT87_REG_FANX_MIN[nr],
data->fan[nr][index] >> 8);
} else {
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[nr][index] =
FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
it87_write_value(data, IT87_REG_FAN_MIN[nr],
data->fan[nr][index]);
}
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[nr][1], 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[nr][1] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan[nr][1]);
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;
}
/* IT8603E does not have on/off mode */
if (val == 0 && data->type == it8603)
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]);
if (data->type != it8603) {
/* 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);