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linux-next/drivers/hwmon/w83795.c
Bartosz Golaszewski cdb1dc3f1c hwmon: (w83795) use find_closest_descending() in pwm_freq_to_reg() 
Replace the loop iterating over pwm_freq_cksel0 with a call to
find_closest_descending().

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-17 09:03:55 -04:00

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/*
* w83795.c - Linux kernel driver for hardware monitoring
* Copyright (C) 2008 Nuvoton Technology Corp.
* Wei Song
* Copyright (C) 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 - version 2.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*
* Supports following chips:
*
* Chip #vin #fanin #pwm #temp #dts wchipid vendid i2c ISA
* w83795g 21 14 8 6 8 0x79 0x5ca3 yes no
* w83795adg 18 14 2 6 8 0x79 0x5ca3 yes no
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/jiffies.h>
#include <linux/util_macros.h>
/* Addresses to scan */
static const unsigned short normal_i2c[] = {
0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
};
static bool reset;
module_param(reset, bool, 0);
MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
#define W83795_REG_BANKSEL 0x00
#define W83795_REG_VENDORID 0xfd
#define W83795_REG_CHIPID 0xfe
#define W83795_REG_DEVICEID 0xfb
#define W83795_REG_DEVICEID_A 0xff
#define W83795_REG_I2C_ADDR 0xfc
#define W83795_REG_CONFIG 0x01
#define W83795_REG_CONFIG_CONFIG48 0x04
#define W83795_REG_CONFIG_START 0x01
/* Multi-Function Pin Ctrl Registers */
#define W83795_REG_VOLT_CTRL1 0x02
#define W83795_REG_VOLT_CTRL2 0x03
#define W83795_REG_TEMP_CTRL1 0x04
#define W83795_REG_TEMP_CTRL2 0x05
#define W83795_REG_FANIN_CTRL1 0x06
#define W83795_REG_FANIN_CTRL2 0x07
#define W83795_REG_VMIGB_CTRL 0x08
#define TEMP_READ 0
#define TEMP_CRIT 1
#define TEMP_CRIT_HYST 2
#define TEMP_WARN 3
#define TEMP_WARN_HYST 4
/*
* only crit and crit_hyst affect real-time alarm status
* current crit crit_hyst warn warn_hyst
*/
static const u16 W83795_REG_TEMP[][5] = {
{0x21, 0x96, 0x97, 0x98, 0x99}, /* TD1/TR1 */
{0x22, 0x9a, 0x9b, 0x9c, 0x9d}, /* TD2/TR2 */
{0x23, 0x9e, 0x9f, 0xa0, 0xa1}, /* TD3/TR3 */
{0x24, 0xa2, 0xa3, 0xa4, 0xa5}, /* TD4/TR4 */
{0x1f, 0xa6, 0xa7, 0xa8, 0xa9}, /* TR5 */
{0x20, 0xaa, 0xab, 0xac, 0xad}, /* TR6 */
};
#define IN_READ 0
#define IN_MAX 1
#define IN_LOW 2
static const u16 W83795_REG_IN[][3] = {
/* Current, HL, LL */
{0x10, 0x70, 0x71}, /* VSEN1 */
{0x11, 0x72, 0x73}, /* VSEN2 */
{0x12, 0x74, 0x75}, /* VSEN3 */
{0x13, 0x76, 0x77}, /* VSEN4 */
{0x14, 0x78, 0x79}, /* VSEN5 */
{0x15, 0x7a, 0x7b}, /* VSEN6 */
{0x16, 0x7c, 0x7d}, /* VSEN7 */
{0x17, 0x7e, 0x7f}, /* VSEN8 */
{0x18, 0x80, 0x81}, /* VSEN9 */
{0x19, 0x82, 0x83}, /* VSEN10 */
{0x1A, 0x84, 0x85}, /* VSEN11 */
{0x1B, 0x86, 0x87}, /* VTT */
{0x1C, 0x88, 0x89}, /* 3VDD */
{0x1D, 0x8a, 0x8b}, /* 3VSB */
{0x1E, 0x8c, 0x8d}, /* VBAT */
{0x1F, 0xa6, 0xa7}, /* VSEN12 */
{0x20, 0xaa, 0xab}, /* VSEN13 */
{0x21, 0x96, 0x97}, /* VSEN14 */
{0x22, 0x9a, 0x9b}, /* VSEN15 */
{0x23, 0x9e, 0x9f}, /* VSEN16 */
{0x24, 0xa2, 0xa3}, /* VSEN17 */
};
#define W83795_REG_VRLSB 0x3C
static const u8 W83795_REG_IN_HL_LSB[] = {
0x8e, /* VSEN1-4 */
0x90, /* VSEN5-8 */
0x92, /* VSEN9-11 */
0x94, /* VTT, 3VDD, 3VSB, 3VBAT */
0xa8, /* VSEN12 */
0xac, /* VSEN13 */
0x98, /* VSEN14 */
0x9c, /* VSEN15 */
0xa0, /* VSEN16 */
0xa4, /* VSEN17 */
};
#define IN_LSB_REG(index, type) \
(((type) == 1) ? W83795_REG_IN_HL_LSB[(index)] \
: (W83795_REG_IN_HL_LSB[(index)] + 1))
#define IN_LSB_SHIFT 0
#define IN_LSB_IDX 1
static const u8 IN_LSB_SHIFT_IDX[][2] = {
/* High/Low LSB shift, LSB No. */
{0x00, 0x00}, /* VSEN1 */
{0x02, 0x00}, /* VSEN2 */
{0x04, 0x00}, /* VSEN3 */
{0x06, 0x00}, /* VSEN4 */
{0x00, 0x01}, /* VSEN5 */
{0x02, 0x01}, /* VSEN6 */
{0x04, 0x01}, /* VSEN7 */
{0x06, 0x01}, /* VSEN8 */
{0x00, 0x02}, /* VSEN9 */
{0x02, 0x02}, /* VSEN10 */
{0x04, 0x02}, /* VSEN11 */
{0x00, 0x03}, /* VTT */
{0x02, 0x03}, /* 3VDD */
{0x04, 0x03}, /* 3VSB */
{0x06, 0x03}, /* VBAT */
{0x06, 0x04}, /* VSEN12 */
{0x06, 0x05}, /* VSEN13 */
{0x06, 0x06}, /* VSEN14 */
{0x06, 0x07}, /* VSEN15 */
{0x06, 0x08}, /* VSEN16 */
{0x06, 0x09}, /* VSEN17 */
};
#define W83795_REG_FAN(index) (0x2E + (index))
#define W83795_REG_FAN_MIN_HL(index) (0xB6 + (index))
#define W83795_REG_FAN_MIN_LSB(index) (0xC4 + (index) / 2)
#define W83795_REG_FAN_MIN_LSB_SHIFT(index) \
(((index) & 1) ? 4 : 0)
#define W83795_REG_VID_CTRL 0x6A
#define W83795_REG_ALARM_CTRL 0x40
#define ALARM_CTRL_RTSACS (1 << 7)
#define W83795_REG_ALARM(index) (0x41 + (index))
#define W83795_REG_CLR_CHASSIS 0x4D
#define W83795_REG_BEEP(index) (0x50 + (index))
#define W83795_REG_OVT_CFG 0x58
#define OVT_CFG_SEL (1 << 7)
#define W83795_REG_FCMS1 0x201
#define W83795_REG_FCMS2 0x208
#define W83795_REG_TFMR(index) (0x202 + (index))
#define W83795_REG_FOMC 0x20F
#define W83795_REG_TSS(index) (0x209 + (index))
#define TSS_MAP_RESERVED 0xff
static const u8 tss_map[4][6] = {
{ 0, 1, 2, 3, 4, 5},
{ 6, 7, 8, 9, 0, 1},
{10, 11, 12, 13, 2, 3},
{ 4, 5, 4, 5, TSS_MAP_RESERVED, TSS_MAP_RESERVED},
};
#define PWM_OUTPUT 0
#define PWM_FREQ 1
#define PWM_START 2
#define PWM_NONSTOP 3
#define PWM_STOP_TIME 4
#define W83795_REG_PWM(index, nr) (0x210 + (nr) * 8 + (index))
#define W83795_REG_FTSH(index) (0x240 + (index) * 2)
#define W83795_REG_FTSL(index) (0x241 + (index) * 2)
#define W83795_REG_TFTS 0x250
#define TEMP_PWM_TTTI 0
#define TEMP_PWM_CTFS 1
#define TEMP_PWM_HCT 2
#define TEMP_PWM_HOT 3
#define W83795_REG_TTTI(index) (0x260 + (index))
#define W83795_REG_CTFS(index) (0x268 + (index))
#define W83795_REG_HT(index) (0x270 + (index))
#define SF4_TEMP 0
#define SF4_PWM 1
#define W83795_REG_SF4_TEMP(temp_num, index) \
(0x280 + 0x10 * (temp_num) + (index))
#define W83795_REG_SF4_PWM(temp_num, index) \
(0x288 + 0x10 * (temp_num) + (index))
#define W83795_REG_DTSC 0x301
#define W83795_REG_DTSE 0x302
#define W83795_REG_DTS(index) (0x26 + (index))
#define W83795_REG_PECI_TBASE(index) (0x320 + (index))
#define DTS_CRIT 0
#define DTS_CRIT_HYST 1
#define DTS_WARN 2
#define DTS_WARN_HYST 3
#define W83795_REG_DTS_EXT(index) (0xB2 + (index))
#define SETUP_PWM_DEFAULT 0
#define SETUP_PWM_UPTIME 1
#define SETUP_PWM_DOWNTIME 2
#define W83795_REG_SETUP_PWM(index) (0x20C + (index))
static inline u16 in_from_reg(u8 index, u16 val)
{
/* 3VDD, 3VSB and VBAT: 6 mV/bit; other inputs: 2 mV/bit */
if (index >= 12 && index <= 14)
return val * 6;
else
return val * 2;
}
static inline u16 in_to_reg(u8 index, u16 val)
{
if (index >= 12 && index <= 14)
return val / 6;
else
return val / 2;
}
static inline unsigned long fan_from_reg(u16 val)
{
if ((val == 0xfff) || (val == 0))
return 0;
return 1350000UL / val;
}
static inline u16 fan_to_reg(long rpm)
{
if (rpm <= 0)
return 0x0fff;
return clamp_val((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
}
static inline unsigned long time_from_reg(u8 reg)
{
return reg * 100;
}
static inline u8 time_to_reg(unsigned long val)
{
return clamp_val((val + 50) / 100, 0, 0xff);
}
static inline long temp_from_reg(s8 reg)
{
return reg * 1000;
}
static inline s8 temp_to_reg(long val, s8 min, s8 max)
{
return clamp_val(val / 1000, min, max);
}
static const u16 pwm_freq_cksel0[16] = {
1024, 512, 341, 256, 205, 171, 146, 128,
85, 64, 32, 16, 8, 4, 2, 1
};
static unsigned int pwm_freq_from_reg(u8 reg, u16 clkin)
{
unsigned long base_clock;
if (reg & 0x80) {
base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
return base_clock / ((reg & 0x7f) + 1);
} else
return pwm_freq_cksel0[reg & 0x0f];
}
static u8 pwm_freq_to_reg(unsigned long val, u16 clkin)
{
unsigned long base_clock;
u8 reg0, reg1;
unsigned long best0, best1;
/* Best fit for cksel = 0 */
reg0 = find_closest_descending(val, pwm_freq_cksel0,
ARRAY_SIZE(pwm_freq_cksel0));
if (val < 375) /* cksel = 1 can't beat this */
return reg0;
best0 = pwm_freq_cksel0[reg0];
/* Best fit for cksel = 1 */
base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
reg1 = clamp_val(DIV_ROUND_CLOSEST(base_clock, val), 1, 128);
best1 = base_clock / reg1;
reg1 = 0x80 | (reg1 - 1);
/* Choose the closest one */
if (abs(val - best0) > abs(val - best1))
return reg1;
else
return reg0;
}
enum chip_types {w83795g, w83795adg};
struct w83795_data {
struct device *hwmon_dev;
struct mutex update_lock;
unsigned long last_updated; /* In jiffies */
enum chip_types chip_type;
u8 bank;
u32 has_in; /* Enable monitor VIN or not */
u8 has_dyn_in; /* Only in2-0 can have this */
u16 in[21][3]; /* Register value, read/high/low */
u8 in_lsb[10][3]; /* LSB Register value, high/low */
u8 has_gain; /* has gain: in17-20 * 8 */
u16 has_fan; /* Enable fan14-1 or not */
u16 fan[14]; /* Register value combine */
u16 fan_min[14]; /* Register value combine */
u8 has_temp; /* Enable monitor temp6-1 or not */
s8 temp[6][5]; /* current, crit, crit_hyst, warn, warn_hyst */
u8 temp_read_vrlsb[6];
u8 temp_mode; /* Bit vector, 0 = TR, 1 = TD */
u8 temp_src[3]; /* Register value */
u8 enable_dts; /*
* Enable PECI and SB-TSI,
* bit 0: =1 enable, =0 disable,
* bit 1: =1 AMD SB-TSI, =0 Intel PECI
*/
u8 has_dts; /* Enable monitor DTS temp */
s8 dts[8]; /* Register value */
u8 dts_read_vrlsb[8]; /* Register value */
s8 dts_ext[4]; /* Register value */
u8 has_pwm; /*
* 795g supports 8 pwm, 795adg only supports 2,
* no config register, only affected by chip
* type
*/
u8 pwm[8][5]; /*
* Register value, output, freq, start,
* non stop, stop time
*/
u16 clkin; /* CLKIN frequency in kHz */
u8 pwm_fcms[2]; /* Register value */
u8 pwm_tfmr[6]; /* Register value */
u8 pwm_fomc; /* Register value */
u16 target_speed[8]; /*
* Register value, target speed for speed
* cruise
*/
u8 tol_speed; /* tolerance of target speed */
u8 pwm_temp[6][4]; /* TTTI, CTFS, HCT, HOT */
u8 sf4_reg[6][2][7]; /* 6 temp, temp/dcpwm, 7 registers */
u8 setup_pwm[3]; /* Register value */
u8 alarms[6]; /* Register value */
u8 enable_beep;
u8 beeps[6]; /* Register value */
char valid;
char valid_limits;
char valid_pwm_config;
};
/*
* Hardware access
* We assume that nobdody can change the bank outside the driver.
*/
/* Must be called with data->update_lock held, except during initialization */
static int w83795_set_bank(struct i2c_client *client, u8 bank)
{
struct w83795_data *data = i2c_get_clientdata(client);
int err;
/* If the same bank is already set, nothing to do */
if ((data->bank & 0x07) == bank)
return 0;
/* Change to new bank, preserve all other bits */
bank |= data->bank & ~0x07;
err = i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL, bank);
if (err < 0) {
dev_err(&client->dev,
"Failed to set bank to %d, err %d\n",
(int)bank, err);
return err;
}
data->bank = bank;
return 0;
}
/* Must be called with data->update_lock held, except during initialization */
static u8 w83795_read(struct i2c_client *client, u16 reg)
{
int err;
err = w83795_set_bank(client, reg >> 8);
if (err < 0)
return 0x00; /* Arbitrary */
err = i2c_smbus_read_byte_data(client, reg & 0xff);
if (err < 0) {
dev_err(&client->dev,
"Failed to read from register 0x%03x, err %d\n",
(int)reg, err);
return 0x00; /* Arbitrary */
}
return err;
}
/* Must be called with data->update_lock held, except during initialization */
static int w83795_write(struct i2c_client *client, u16 reg, u8 value)
{
int err;
err = w83795_set_bank(client, reg >> 8);
if (err < 0)
return err;
err = i2c_smbus_write_byte_data(client, reg & 0xff, value);
if (err < 0)
dev_err(&client->dev,
"Failed to write to register 0x%03x, err %d\n",
(int)reg, err);
return err;
}
static void w83795_update_limits(struct i2c_client *client)
{
struct w83795_data *data = i2c_get_clientdata(client);
int i, limit;
u8 lsb;
/* Read the voltage limits */
for (i = 0; i < ARRAY_SIZE(data->in); i++) {
if (!(data->has_in & (1 << i)))
continue;
data->in[i][IN_MAX] =
w83795_read(client, W83795_REG_IN[i][IN_MAX]);
data->in[i][IN_LOW] =
w83795_read(client, W83795_REG_IN[i][IN_LOW]);
}
for (i = 0; i < ARRAY_SIZE(data->in_lsb); i++) {
if ((i == 2 && data->chip_type == w83795adg) ||
(i >= 4 && !(data->has_in & (1 << (i + 11)))))
continue;
data->in_lsb[i][IN_MAX] =
w83795_read(client, IN_LSB_REG(i, IN_MAX));
data->in_lsb[i][IN_LOW] =
w83795_read(client, IN_LSB_REG(i, IN_LOW));
}
/* Read the fan limits */
lsb = 0; /* Silent false gcc warning */
for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
/*
* Each register contains LSB for 2 fans, but we want to
* read it only once to save time
*/
if ((i & 1) == 0 && (data->has_fan & (3 << i)))
lsb = w83795_read(client, W83795_REG_FAN_MIN_LSB(i));
if (!(data->has_fan & (1 << i)))
continue;
data->fan_min[i] =
w83795_read(client, W83795_REG_FAN_MIN_HL(i)) << 4;
data->fan_min[i] |=
(lsb >> W83795_REG_FAN_MIN_LSB_SHIFT(i)) & 0x0F;
}
/* Read the temperature limits */
for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
if (!(data->has_temp & (1 << i)))
continue;
for (limit = TEMP_CRIT; limit <= TEMP_WARN_HYST; limit++)
data->temp[i][limit] =
w83795_read(client, W83795_REG_TEMP[i][limit]);
}
/* Read the DTS limits */
if (data->enable_dts) {
for (limit = DTS_CRIT; limit <= DTS_WARN_HYST; limit++)
data->dts_ext[limit] =
w83795_read(client, W83795_REG_DTS_EXT(limit));
}
/* Read beep settings */
if (data->enable_beep) {
for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
data->beeps[i] =
w83795_read(client, W83795_REG_BEEP(i));
}
data->valid_limits = 1;
}
static struct w83795_data *w83795_update_pwm_config(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = i2c_get_clientdata(client);
int i, tmp;
mutex_lock(&data->update_lock);
if (data->valid_pwm_config)
goto END;
/* Read temperature source selection */
for (i = 0; i < ARRAY_SIZE(data->temp_src); i++)
data->temp_src[i] = w83795_read(client, W83795_REG_TSS(i));
/* Read automatic fan speed control settings */
data->pwm_fcms[0] = w83795_read(client, W83795_REG_FCMS1);
data->pwm_fcms[1] = w83795_read(client, W83795_REG_FCMS2);
for (i = 0; i < ARRAY_SIZE(data->pwm_tfmr); i++)
data->pwm_tfmr[i] = w83795_read(client, W83795_REG_TFMR(i));
data->pwm_fomc = w83795_read(client, W83795_REG_FOMC);
for (i = 0; i < data->has_pwm; i++) {
for (tmp = PWM_FREQ; tmp <= PWM_STOP_TIME; tmp++)
data->pwm[i][tmp] =
w83795_read(client, W83795_REG_PWM(i, tmp));
}
for (i = 0; i < ARRAY_SIZE(data->target_speed); i++) {
data->target_speed[i] =
w83795_read(client, W83795_REG_FTSH(i)) << 4;
data->target_speed[i] |=
w83795_read(client, W83795_REG_FTSL(i)) >> 4;
}
data->tol_speed = w83795_read(client, W83795_REG_TFTS) & 0x3f;
for (i = 0; i < ARRAY_SIZE(data->pwm_temp); i++) {
data->pwm_temp[i][TEMP_PWM_TTTI] =
w83795_read(client, W83795_REG_TTTI(i)) & 0x7f;
data->pwm_temp[i][TEMP_PWM_CTFS] =
w83795_read(client, W83795_REG_CTFS(i));
tmp = w83795_read(client, W83795_REG_HT(i));
data->pwm_temp[i][TEMP_PWM_HCT] = tmp >> 4;
data->pwm_temp[i][TEMP_PWM_HOT] = tmp & 0x0f;
}
/* Read SmartFanIV trip points */
for (i = 0; i < ARRAY_SIZE(data->sf4_reg); i++) {
for (tmp = 0; tmp < 7; tmp++) {
data->sf4_reg[i][SF4_TEMP][tmp] =
w83795_read(client,
W83795_REG_SF4_TEMP(i, tmp));
data->sf4_reg[i][SF4_PWM][tmp] =
w83795_read(client, W83795_REG_SF4_PWM(i, tmp));
}
}
/* Read setup PWM */
for (i = 0; i < ARRAY_SIZE(data->setup_pwm); i++)
data->setup_pwm[i] =
w83795_read(client, W83795_REG_SETUP_PWM(i));
data->valid_pwm_config = 1;
END:
mutex_unlock(&data->update_lock);
return data;
}
static struct w83795_data *w83795_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = i2c_get_clientdata(client);
u16 tmp;
u8 intrusion;
int i;
mutex_lock(&data->update_lock);
if (!data->valid_limits)
w83795_update_limits(client);
if (!(time_after(jiffies, data->last_updated + HZ * 2)
|| !data->valid))
goto END;
/* Update the voltages value */
for (i = 0; i < ARRAY_SIZE(data->in); i++) {
if (!(data->has_in & (1 << i)))
continue;
tmp = w83795_read(client, W83795_REG_IN[i][IN_READ]) << 2;
tmp |= w83795_read(client, W83795_REG_VRLSB) >> 6;
data->in[i][IN_READ] = tmp;
}
/* in0-2 can have dynamic limits (W83795G only) */
if (data->has_dyn_in) {
u8 lsb_max = w83795_read(client, IN_LSB_REG(0, IN_MAX));
u8 lsb_low = w83795_read(client, IN_LSB_REG(0, IN_LOW));
for (i = 0; i < 3; i++) {
if (!(data->has_dyn_in & (1 << i)))
continue;
data->in[i][IN_MAX] =
w83795_read(client, W83795_REG_IN[i][IN_MAX]);
data->in[i][IN_LOW] =
w83795_read(client, W83795_REG_IN[i][IN_LOW]);
data->in_lsb[i][IN_MAX] = (lsb_max >> (2 * i)) & 0x03;
data->in_lsb[i][IN_LOW] = (lsb_low >> (2 * i)) & 0x03;
}
}
/* Update fan */
for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
if (!(data->has_fan & (1 << i)))
continue;
data->fan[i] = w83795_read(client, W83795_REG_FAN(i)) << 4;
data->fan[i] |= w83795_read(client, W83795_REG_VRLSB) >> 4;
}
/* Update temperature */
for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
data->temp[i][TEMP_READ] =
w83795_read(client, W83795_REG_TEMP[i][TEMP_READ]);
data->temp_read_vrlsb[i] =
w83795_read(client, W83795_REG_VRLSB);
}
/* Update dts temperature */
if (data->enable_dts) {
for (i = 0; i < ARRAY_SIZE(data->dts); i++) {
if (!(data->has_dts & (1 << i)))
continue;
data->dts[i] =
w83795_read(client, W83795_REG_DTS(i));
data->dts_read_vrlsb[i] =
w83795_read(client, W83795_REG_VRLSB);
}
}
/* Update pwm output */
for (i = 0; i < data->has_pwm; i++) {
data->pwm[i][PWM_OUTPUT] =
w83795_read(client, W83795_REG_PWM(i, PWM_OUTPUT));
}
/*
* Update intrusion and alarms
* It is important to read intrusion first, because reading from
* register SMI STS6 clears the interrupt status temporarily.
*/
tmp = w83795_read(client, W83795_REG_ALARM_CTRL);
/* Switch to interrupt status for intrusion if needed */
if (tmp & ALARM_CTRL_RTSACS)
w83795_write(client, W83795_REG_ALARM_CTRL,
tmp & ~ALARM_CTRL_RTSACS);
intrusion = w83795_read(client, W83795_REG_ALARM(5)) & (1 << 6);
/* Switch to real-time alarms */
w83795_write(client, W83795_REG_ALARM_CTRL, tmp | ALARM_CTRL_RTSACS);
for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
data->alarms[i] = w83795_read(client, W83795_REG_ALARM(i));
data->alarms[5] |= intrusion;
/* Restore original configuration if needed */
if (!(tmp & ALARM_CTRL_RTSACS))
w83795_write(client, W83795_REG_ALARM_CTRL,
tmp & ~ALARM_CTRL_RTSACS);
data->last_updated = jiffies;
data->valid = 1;
END:
mutex_unlock(&data->update_lock);
return data;
}
/*
* Sysfs attributes
*/
#define ALARM_STATUS 0
#define BEEP_ENABLE 1
static ssize_t
show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
{
struct w83795_data *data = w83795_update_device(dev);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index >> 3;
int bit = sensor_attr->index & 0x07;
u8 val;
if (nr == ALARM_STATUS)
val = (data->alarms[index] >> bit) & 1;
else /* BEEP_ENABLE */
val = (data->beeps[index] >> bit) & 1;
return sprintf(buf, "%u\n", val);
}
static ssize_t
store_beep(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int index = sensor_attr->index >> 3;
int shift = sensor_attr->index & 0x07;
u8 beep_bit = 1 << shift;
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
if (val != 0 && val != 1)
return -EINVAL;
mutex_lock(&data->update_lock);
data->beeps[index] = w83795_read(client, W83795_REG_BEEP(index));
data->beeps[index] &= ~beep_bit;
data->beeps[index] |= val << shift;
w83795_write(client, W83795_REG_BEEP(index), data->beeps[index]);
mutex_unlock(&data->update_lock);
return count;
}
/* Write 0 to clear chassis alarm */
static ssize_t
store_chassis_clear(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = i2c_get_clientdata(client);
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0 || val != 0)
return -EINVAL;
mutex_lock(&data->update_lock);
val = w83795_read(client, W83795_REG_CLR_CHASSIS);
val |= 0x80;
w83795_write(client, W83795_REG_CLR_CHASSIS, val);
/* Clear status and force cache refresh */
w83795_read(client, W83795_REG_ALARM(5));
data->valid = 0;
mutex_unlock(&data->update_lock);
return count;
}
#define FAN_INPUT 0
#define FAN_MIN 1
static ssize_t
show_fan(struct device *dev, struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
struct w83795_data *data = w83795_update_device(dev);
u16 val;
if (nr == FAN_INPUT)
val = data->fan[index] & 0x0fff;
else
val = data->fan_min[index] & 0x0fff;
return sprintf(buf, "%lu\n", fan_from_reg(val));
}
static ssize_t
store_fan_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int index = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = i2c_get_clientdata(client);
unsigned long val;
if (kstrtoul(buf, 10, &val))
return -EINVAL;
val = fan_to_reg(val);
mutex_lock(&data->update_lock);
data->fan_min[index] = val;
w83795_write(client, W83795_REG_FAN_MIN_HL(index), (val >> 4) & 0xff);
val &= 0x0f;
if (index & 1) {
val <<= 4;
val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
& 0x0f;
} else {
val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
& 0xf0;
}
w83795_write(client, W83795_REG_FAN_MIN_LSB(index), val & 0xff);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t
show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
{
struct w83795_data *data;
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
unsigned int val;
data = nr == PWM_OUTPUT ? w83795_update_device(dev)
: w83795_update_pwm_config(dev);
switch (nr) {
case PWM_STOP_TIME:
val = time_from_reg(data->pwm[index][nr]);
break;
case PWM_FREQ:
val = pwm_freq_from_reg(data->pwm[index][nr], data->clkin);
break;
default:
val = data->pwm[index][nr];
break;
}
return sprintf(buf, "%u\n", val);
}
static ssize_t
store_pwm(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
mutex_lock(&data->update_lock);
switch (nr) {
case PWM_STOP_TIME:
val = time_to_reg(val);
break;
case PWM_FREQ:
val = pwm_freq_to_reg(val, data->clkin);
break;
default:
val = clamp_val(val, 0, 0xff);
break;
}
w83795_write(client, W83795_REG_PWM(index, nr), val);
data->pwm[index][nr] = val;
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t
show_pwm_enable(struct device *dev, struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
struct w83795_data *data = w83795_update_pwm_config(dev);
int index = sensor_attr->index;
u8 tmp;
/* Speed cruise mode */
if (data->pwm_fcms[0] & (1 << index)) {
tmp = 2;
goto out;
}
/* Thermal cruise or SmartFan IV mode */
for (tmp = 0; tmp < 6; tmp++) {
if (data->pwm_tfmr[tmp] & (1 << index)) {
tmp = 3;
goto out;
}
}
/* Manual mode */
tmp = 1;
out:
return sprintf(buf, "%u\n", tmp);
}
static ssize_t
store_pwm_enable(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = w83795_update_pwm_config(dev);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int index = sensor_attr->index;
unsigned long val;
int i;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
if (val < 1 || val > 2)
return -EINVAL;
#ifndef CONFIG_SENSORS_W83795_FANCTRL
if (val > 1) {
dev_warn(dev, "Automatic fan speed control support disabled\n");
dev_warn(dev, "Build with CONFIG_SENSORS_W83795_FANCTRL=y if you want it\n");
return -EOPNOTSUPP;
}
#endif
mutex_lock(&data->update_lock);
switch (val) {
case 1:
/* Clear speed cruise mode bits */
data->pwm_fcms[0] &= ~(1 << index);
w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
/* Clear thermal cruise mode bits */
for (i = 0; i < 6; i++) {
data->pwm_tfmr[i] &= ~(1 << index);
w83795_write(client, W83795_REG_TFMR(i),
data->pwm_tfmr[i]);
}
break;
case 2:
data->pwm_fcms[0] |= (1 << index);
w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
break;
}
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t
show_pwm_mode(struct device *dev, struct device_attribute *attr, char *buf)
{
struct w83795_data *data = w83795_update_pwm_config(dev);
int index = to_sensor_dev_attr_2(attr)->index;
unsigned int mode;
if (data->pwm_fomc & (1 << index))
mode = 0; /* DC */
else
mode = 1; /* PWM */
return sprintf(buf, "%u\n", mode);
}
/*
* Check whether a given temperature source can ever be useful.
* Returns the number of selectable temperature channels which are
* enabled.
*/
static int w83795_tss_useful(const struct w83795_data *data, int tsrc)
{
int useful = 0, i;
for (i = 0; i < 4; i++) {
if (tss_map[i][tsrc] == TSS_MAP_RESERVED)
continue;
if (tss_map[i][tsrc] < 6) /* Analog */
useful += (data->has_temp >> tss_map[i][tsrc]) & 1;
else /* Digital */
useful += (data->has_dts >> (tss_map[i][tsrc] - 6)) & 1;
}
return useful;
}
static ssize_t
show_temp_src(struct device *dev, struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
struct w83795_data *data = w83795_update_pwm_config(dev);
int index = sensor_attr->index;
u8 tmp = data->temp_src[index / 2];
if (index & 1)
tmp >>= 4; /* Pick high nibble */
else
tmp &= 0x0f; /* Pick low nibble */
/* Look-up the actual temperature channel number */
if (tmp >= 4 || tss_map[tmp][index] == TSS_MAP_RESERVED)
return -EINVAL; /* Shouldn't happen */
return sprintf(buf, "%u\n", (unsigned int)tss_map[tmp][index] + 1);
}
static ssize_t
store_temp_src(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = w83795_update_pwm_config(dev);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int index = sensor_attr->index;
int tmp;
unsigned long channel;
u8 val = index / 2;
if (kstrtoul(buf, 10, &channel) < 0 ||
channel < 1 || channel > 14)
return -EINVAL;
/* Check if request can be fulfilled */
for (tmp = 0; tmp < 4; tmp++) {
if (tss_map[tmp][index] == channel - 1)
break;
}
if (tmp == 4) /* No match */
return -EINVAL;
mutex_lock(&data->update_lock);
if (index & 1) {
tmp <<= 4;
data->temp_src[val] &= 0x0f;
} else {
data->temp_src[val] &= 0xf0;
}
data->temp_src[val] |= tmp;
w83795_write(client, W83795_REG_TSS(val), data->temp_src[val]);
mutex_unlock(&data->update_lock);
return count;
}
#define TEMP_PWM_ENABLE 0
#define TEMP_PWM_FAN_MAP 1
static ssize_t
show_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct w83795_data *data = w83795_update_pwm_config(dev);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
u8 tmp = 0xff;
switch (nr) {
case TEMP_PWM_ENABLE:
tmp = (data->pwm_fcms[1] >> index) & 1;
if (tmp)
tmp = 4;
else
tmp = 3;
break;
case TEMP_PWM_FAN_MAP:
tmp = data->pwm_tfmr[index];
break;
}
return sprintf(buf, "%u\n", tmp);
}
static ssize_t
store_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = w83795_update_pwm_config(dev);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
unsigned long tmp;
if (kstrtoul(buf, 10, &tmp) < 0)
return -EINVAL;
switch (nr) {
case TEMP_PWM_ENABLE:
if (tmp != 3 && tmp != 4)
return -EINVAL;
tmp -= 3;
mutex_lock(&data->update_lock);
data->pwm_fcms[1] &= ~(1 << index);
data->pwm_fcms[1] |= tmp << index;
w83795_write(client, W83795_REG_FCMS2, data->pwm_fcms[1]);
mutex_unlock(&data->update_lock);
break;
case TEMP_PWM_FAN_MAP:
mutex_lock(&data->update_lock);
tmp = clamp_val(tmp, 0, 0xff);
w83795_write(client, W83795_REG_TFMR(index), tmp);
data->pwm_tfmr[index] = tmp;
mutex_unlock(&data->update_lock);
break;
}
return count;
}
#define FANIN_TARGET 0
#define FANIN_TOL 1
static ssize_t
show_fanin(struct device *dev, struct device_attribute *attr, char *buf)
{
struct w83795_data *data = w83795_update_pwm_config(dev);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
u16 tmp = 0;
switch (nr) {
case FANIN_TARGET:
tmp = fan_from_reg(data->target_speed[index]);
break;
case FANIN_TOL:
tmp = data->tol_speed;
break;
}
return sprintf(buf, "%u\n", tmp);
}
static ssize_t
store_fanin(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
mutex_lock(&data->update_lock);
switch (nr) {
case FANIN_TARGET:
val = fan_to_reg(clamp_val(val, 0, 0xfff));
w83795_write(client, W83795_REG_FTSH(index), val >> 4);
w83795_write(client, W83795_REG_FTSL(index), (val << 4) & 0xf0);
data->target_speed[index] = val;
break;
case FANIN_TOL:
val = clamp_val(val, 0, 0x3f);
w83795_write(client, W83795_REG_TFTS, val);
data->tol_speed = val;
break;
}
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t
show_temp_pwm(struct device *dev, struct device_attribute *attr, char *buf)
{
struct w83795_data *data = w83795_update_pwm_config(dev);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
long tmp = temp_from_reg(data->pwm_temp[index][nr]);
return sprintf(buf, "%ld\n", tmp);
}
static ssize_t
store_temp_pwm(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
unsigned long val;
u8 tmp;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
val /= 1000;
mutex_lock(&data->update_lock);
switch (nr) {
case TEMP_PWM_TTTI:
val = clamp_val(val, 0, 0x7f);
w83795_write(client, W83795_REG_TTTI(index), val);
break;
case TEMP_PWM_CTFS:
val = clamp_val(val, 0, 0x7f);
w83795_write(client, W83795_REG_CTFS(index), val);
break;
case TEMP_PWM_HCT:
val = clamp_val(val, 0, 0x0f);
tmp = w83795_read(client, W83795_REG_HT(index));
tmp &= 0x0f;
tmp |= (val << 4) & 0xf0;
w83795_write(client, W83795_REG_HT(index), tmp);
break;
case TEMP_PWM_HOT:
val = clamp_val(val, 0, 0x0f);
tmp = w83795_read(client, W83795_REG_HT(index));
tmp &= 0xf0;
tmp |= val & 0x0f;
w83795_write(client, W83795_REG_HT(index), tmp);
break;
}
data->pwm_temp[index][nr] = val;
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t
show_sf4_pwm(struct device *dev, struct device_attribute *attr, char *buf)
{
struct w83795_data *data = w83795_update_pwm_config(dev);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
return sprintf(buf, "%u\n", data->sf4_reg[index][SF4_PWM][nr]);
}
static ssize_t
store_sf4_pwm(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
mutex_lock(&data->update_lock);
w83795_write(client, W83795_REG_SF4_PWM(index, nr), val);
data->sf4_reg[index][SF4_PWM][nr] = val;
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t
show_sf4_temp(struct device *dev, struct device_attribute *attr, char *buf)
{
struct w83795_data *data = w83795_update_pwm_config(dev);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
return sprintf(buf, "%u\n",
(data->sf4_reg[index][SF4_TEMP][nr]) * 1000);
}
static ssize_t
store_sf4_temp(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
val /= 1000;
mutex_lock(&data->update_lock);
w83795_write(client, W83795_REG_SF4_TEMP(index, nr), val);
data->sf4_reg[index][SF4_TEMP][nr] = val;
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t
show_temp(struct device *dev, struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
struct w83795_data *data = w83795_update_device(dev);
long temp = temp_from_reg(data->temp[index][nr]);
if (nr == TEMP_READ)
temp += (data->temp_read_vrlsb[index] >> 6) * 250;
return sprintf(buf, "%ld\n", temp);
}
static ssize_t
store_temp(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = i2c_get_clientdata(client);
long tmp;
if (kstrtol(buf, 10, &tmp) < 0)
return -EINVAL;
mutex_lock(&data->update_lock);
data->temp[index][nr] = temp_to_reg(tmp, -128, 127);
w83795_write(client, W83795_REG_TEMP[index][nr], data->temp[index][nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t
show_dts_mode(struct device *dev, struct device_attribute *attr, char *buf)
{
struct w83795_data *data = dev_get_drvdata(dev);
int tmp;
if (data->enable_dts & 2)
tmp = 5;
else
tmp = 6;
return sprintf(buf, "%d\n", tmp);
}
static ssize_t
show_dts(struct device *dev, struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int index = sensor_attr->index;
struct w83795_data *data = w83795_update_device(dev);
long temp = temp_from_reg(data->dts[index]);
temp += (data->dts_read_vrlsb[index] >> 6) * 250;
return sprintf(buf, "%ld\n", temp);
}
static ssize_t
show_dts_ext(struct device *dev, struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
struct w83795_data *data = dev_get_drvdata(dev);
long temp = temp_from_reg(data->dts_ext[nr]);
return sprintf(buf, "%ld\n", temp);
}
static ssize_t
store_dts_ext(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = i2c_get_clientdata(client);
long tmp;
if (kstrtol(buf, 10, &tmp) < 0)
return -EINVAL;
mutex_lock(&data->update_lock);
data->dts_ext[nr] = temp_to_reg(tmp, -128, 127);
w83795_write(client, W83795_REG_DTS_EXT(nr), data->dts_ext[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t
show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
{
struct w83795_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int index = sensor_attr->index;
int tmp;
if (data->temp_mode & (1 << index))
tmp = 3; /* Thermal diode */
else
tmp = 4; /* Thermistor */
return sprintf(buf, "%d\n", tmp);
}
/* Only for temp1-4 (temp5-6 can only be thermistor) */
static ssize_t
store_temp_mode(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int index = sensor_attr->index;
int reg_shift;
unsigned long val;
u8 tmp;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
if ((val != 4) && (val != 3))
return -EINVAL;
mutex_lock(&data->update_lock);
if (val == 3) {
/* Thermal diode */
val = 0x01;
data->temp_mode |= 1 << index;
} else if (val == 4) {
/* Thermistor */
val = 0x03;
data->temp_mode &= ~(1 << index);
}
reg_shift = 2 * index;
tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
tmp &= ~(0x03 << reg_shift);
tmp |= val << reg_shift;
w83795_write(client, W83795_REG_TEMP_CTRL2, tmp);
mutex_unlock(&data->update_lock);
return count;
}
/* show/store VIN */
static ssize_t
show_in(struct device *dev, struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
struct w83795_data *data = w83795_update_device(dev);
u16 val = data->in[index][nr];
u8 lsb_idx;
switch (nr) {
case IN_READ:
/* calculate this value again by sensors as sensors3.conf */
if ((index >= 17) &&
!((data->has_gain >> (index - 17)) & 1))
val *= 8;
break;
case IN_MAX:
case IN_LOW:
lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
val <<= 2;
val |= (data->in_lsb[lsb_idx][nr] >>
IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]) & 0x03;
if ((index >= 17) &&
!((data->has_gain >> (index - 17)) & 1))
val *= 8;
break;
}
val = in_from_reg(index, val);
return sprintf(buf, "%d\n", val);
}
static ssize_t
store_in(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = i2c_get_clientdata(client);
unsigned long val;
u8 tmp;
u8 lsb_idx;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
val = in_to_reg(index, val);
if ((index >= 17) &&
!((data->has_gain >> (index - 17)) & 1))
val /= 8;
val = clamp_val(val, 0, 0x3FF);
mutex_lock(&data->update_lock);
lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
tmp = w83795_read(client, IN_LSB_REG(lsb_idx, nr));
tmp &= ~(0x03 << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]);
tmp |= (val & 0x03) << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT];
w83795_write(client, IN_LSB_REG(lsb_idx, nr), tmp);
data->in_lsb[lsb_idx][nr] = tmp;
tmp = (val >> 2) & 0xff;
w83795_write(client, W83795_REG_IN[index][nr], tmp);
data->in[index][nr] = tmp;
mutex_unlock(&data->update_lock);
return count;
}
#ifdef CONFIG_SENSORS_W83795_FANCTRL
static ssize_t
show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
struct w83795_data *data = w83795_update_pwm_config(dev);
u16 val = data->setup_pwm[nr];
switch (nr) {
case SETUP_PWM_UPTIME:
case SETUP_PWM_DOWNTIME:
val = time_from_reg(val);
break;
}
return sprintf(buf, "%d\n", val);
}
static ssize_t
store_sf_setup(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
struct i2c_client *client = to_i2c_client(dev);
struct w83795_data *data = i2c_get_clientdata(client);
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
switch (nr) {
case SETUP_PWM_DEFAULT:
val = clamp_val(val, 0, 0xff);
break;
case SETUP_PWM_UPTIME:
case SETUP_PWM_DOWNTIME:
val = time_to_reg(val);
if (val == 0)
return -EINVAL;
break;
}
mutex_lock(&data->update_lock);
data->setup_pwm[nr] = val;
w83795_write(client, W83795_REG_SETUP_PWM(nr), val);
mutex_unlock(&data->update_lock);
return count;
}
#endif
#define NOT_USED -1
/*
* Don't change the attribute order, _max, _min and _beep are accessed by index
* somewhere else in the code
*/
#define SENSOR_ATTR_IN(index) { \
SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL, \
IN_READ, index), \
SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in, \
store_in, IN_MAX, index), \
SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in, \
store_in, IN_LOW, index), \
SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep, \
NULL, ALARM_STATUS, index + ((index > 14) ? 1 : 0)), \
SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO, \
show_alarm_beep, store_beep, BEEP_ENABLE, \
index + ((index > 14) ? 1 : 0)) }
/*
* Don't change the attribute order, _beep is accessed by index
* somewhere else in the code
*/
#define SENSOR_ATTR_FAN(index) { \
SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan, \
NULL, FAN_INPUT, index - 1), \
SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO, \
show_fan, store_fan_min, FAN_MIN, index - 1), \
SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep, \
NULL, ALARM_STATUS, index + 31), \
SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO, \
show_alarm_beep, store_beep, BEEP_ENABLE, index + 31) }
#define SENSOR_ATTR_PWM(index) { \
SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm, \
store_pwm, PWM_OUTPUT, index - 1), \
SENSOR_ATTR_2(pwm##index##_enable, S_IWUSR | S_IRUGO, \
show_pwm_enable, store_pwm_enable, NOT_USED, index - 1), \
SENSOR_ATTR_2(pwm##index##_mode, S_IRUGO, \
show_pwm_mode, NULL, NOT_USED, index - 1), \
SENSOR_ATTR_2(pwm##index##_freq, S_IWUSR | S_IRUGO, \
show_pwm, store_pwm, PWM_FREQ, index - 1), \
SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO, \
show_pwm, store_pwm, PWM_NONSTOP, index - 1), \
SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO, \
show_pwm, store_pwm, PWM_START, index - 1), \
SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO, \
show_pwm, store_pwm, PWM_STOP_TIME, index - 1), \
SENSOR_ATTR_2(fan##index##_target, S_IWUSR | S_IRUGO, \
show_fanin, store_fanin, FANIN_TARGET, index - 1) }
/*
* Don't change the attribute order, _beep is accessed by index
* somewhere else in the code
*/
#define SENSOR_ATTR_DTS(index) { \
SENSOR_ATTR_2(temp##index##_type, S_IRUGO , \
show_dts_mode, NULL, NOT_USED, index - 7), \
SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_dts, \
NULL, NOT_USED, index - 7), \
SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_dts_ext, \
store_dts_ext, DTS_CRIT, NOT_USED), \
SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR, \
show_dts_ext, store_dts_ext, DTS_CRIT_HYST, NOT_USED), \
SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_dts_ext, \
store_dts_ext, DTS_WARN, NOT_USED), \
SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR, \
show_dts_ext, store_dts_ext, DTS_WARN_HYST, NOT_USED), \
SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO, \
show_alarm_beep, NULL, ALARM_STATUS, index + 17), \
SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO, \
show_alarm_beep, store_beep, BEEP_ENABLE, index + 17) }
/*
* Don't change the attribute order, _beep is accessed by index
* somewhere else in the code
*/
#define SENSOR_ATTR_TEMP(index) { \
SENSOR_ATTR_2(temp##index##_type, S_IRUGO | (index < 4 ? S_IWUSR : 0), \
show_temp_mode, store_temp_mode, NOT_USED, index - 1), \
SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp, \
NULL, TEMP_READ, index - 1), \
SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_temp, \
store_temp, TEMP_CRIT, index - 1), \
SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR, \
show_temp, store_temp, TEMP_CRIT_HYST, index - 1), \
SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp, \
store_temp, TEMP_WARN, index - 1), \
SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR, \
show_temp, store_temp, TEMP_WARN_HYST, index - 1), \
SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO, \
show_alarm_beep, NULL, ALARM_STATUS, \
index + (index > 4 ? 11 : 17)), \
SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO, \
show_alarm_beep, store_beep, BEEP_ENABLE, \
index + (index > 4 ? 11 : 17)), \
SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO, \
show_temp_pwm_enable, store_temp_pwm_enable, \
TEMP_PWM_ENABLE, index - 1), \
SENSOR_ATTR_2(temp##index##_auto_channels_pwm, S_IWUSR | S_IRUGO, \
show_temp_pwm_enable, store_temp_pwm_enable, \
TEMP_PWM_FAN_MAP, index - 1), \
SENSOR_ATTR_2(thermal_cruise##index, S_IWUSR | S_IRUGO, \
show_temp_pwm, store_temp_pwm, TEMP_PWM_TTTI, index - 1), \
SENSOR_ATTR_2(temp##index##_warn, S_IWUSR | S_IRUGO, \
show_temp_pwm, store_temp_pwm, TEMP_PWM_CTFS, index - 1), \
SENSOR_ATTR_2(temp##index##_warn_hyst, S_IWUSR | S_IRUGO, \
show_temp_pwm, store_temp_pwm, TEMP_PWM_HCT, index - 1), \
SENSOR_ATTR_2(temp##index##_operation_hyst, S_IWUSR | S_IRUGO, \
show_temp_pwm, store_temp_pwm, TEMP_PWM_HOT, index - 1), \
SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
show_sf4_pwm, store_sf4_pwm, 0, index - 1), \
SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
show_sf4_pwm, store_sf4_pwm, 1, index - 1), \
SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
show_sf4_pwm, store_sf4_pwm, 2, index - 1), \
SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
show_sf4_pwm, store_sf4_pwm, 3, index - 1), \
SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
show_sf4_pwm, store_sf4_pwm, 4, index - 1), \
SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
show_sf4_pwm, store_sf4_pwm, 5, index - 1), \
SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
show_sf4_pwm, store_sf4_pwm, 6, index - 1), \
SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
show_sf4_temp, store_sf4_temp, 0, index - 1), \
SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
show_sf4_temp, store_sf4_temp, 1, index - 1), \
SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
show_sf4_temp, store_sf4_temp, 2, index - 1), \
SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
show_sf4_temp, store_sf4_temp, 3, index - 1), \
SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
show_sf4_temp, store_sf4_temp, 4, index - 1), \
SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
show_sf4_temp, store_sf4_temp, 5, index - 1), \
SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
show_sf4_temp, store_sf4_temp, 6, index - 1) }
static struct sensor_device_attribute_2 w83795_in[][5] = {
SENSOR_ATTR_IN(0),
SENSOR_ATTR_IN(1),
SENSOR_ATTR_IN(2),
SENSOR_ATTR_IN(3),
SENSOR_ATTR_IN(4),
SENSOR_ATTR_IN(5),
SENSOR_ATTR_IN(6),
SENSOR_ATTR_IN(7),
SENSOR_ATTR_IN(8),
SENSOR_ATTR_IN(9),
SENSOR_ATTR_IN(10),
SENSOR_ATTR_IN(11),
SENSOR_ATTR_IN(12),
SENSOR_ATTR_IN(13),
SENSOR_ATTR_IN(14),
SENSOR_ATTR_IN(15),
SENSOR_ATTR_IN(16),
SENSOR_ATTR_IN(17),
SENSOR_ATTR_IN(18),
SENSOR_ATTR_IN(19),
SENSOR_ATTR_IN(20),
};
static const struct sensor_device_attribute_2 w83795_fan[][4] = {
SENSOR_ATTR_FAN(1),
SENSOR_ATTR_FAN(2),
SENSOR_ATTR_FAN(3),
SENSOR_ATTR_FAN(4),
SENSOR_ATTR_FAN(5),
SENSOR_ATTR_FAN(6),
SENSOR_ATTR_FAN(7),
SENSOR_ATTR_FAN(8),
SENSOR_ATTR_FAN(9),
SENSOR_ATTR_FAN(10),
SENSOR_ATTR_FAN(11),
SENSOR_ATTR_FAN(12),
SENSOR_ATTR_FAN(13),
SENSOR_ATTR_FAN(14),
};
static const struct sensor_device_attribute_2 w83795_temp[][28] = {
SENSOR_ATTR_TEMP(1),
SENSOR_ATTR_TEMP(2),
SENSOR_ATTR_TEMP(3),
SENSOR_ATTR_TEMP(4),
SENSOR_ATTR_TEMP(5),
SENSOR_ATTR_TEMP(6),
};
static const struct sensor_device_attribute_2 w83795_dts[][8] = {
SENSOR_ATTR_DTS(7),
SENSOR_ATTR_DTS(8),
SENSOR_ATTR_DTS(9),
SENSOR_ATTR_DTS(10),
SENSOR_ATTR_DTS(11),
SENSOR_ATTR_DTS(12),
SENSOR_ATTR_DTS(13),
SENSOR_ATTR_DTS(14),
};
static const struct sensor_device_attribute_2 w83795_pwm[][8] = {
SENSOR_ATTR_PWM(1),
SENSOR_ATTR_PWM(2),
SENSOR_ATTR_PWM(3),
SENSOR_ATTR_PWM(4),
SENSOR_ATTR_PWM(5),
SENSOR_ATTR_PWM(6),
SENSOR_ATTR_PWM(7),
SENSOR_ATTR_PWM(8),
};
static const struct sensor_device_attribute_2 w83795_tss[6] = {
SENSOR_ATTR_2(temp1_source_sel, S_IWUSR | S_IRUGO,
show_temp_src, store_temp_src, NOT_USED, 0),
SENSOR_ATTR_2(temp2_source_sel, S_IWUSR | S_IRUGO,
show_temp_src, store_temp_src, NOT_USED, 1),
SENSOR_ATTR_2(temp3_source_sel, S_IWUSR | S_IRUGO,
show_temp_src, store_temp_src, NOT_USED, 2),
SENSOR_ATTR_2(temp4_source_sel, S_IWUSR | S_IRUGO,
show_temp_src, store_temp_src, NOT_USED, 3),
SENSOR_ATTR_2(temp5_source_sel, S_IWUSR | S_IRUGO,
show_temp_src, store_temp_src, NOT_USED, 4),
SENSOR_ATTR_2(temp6_source_sel, S_IWUSR | S_IRUGO,
show_temp_src, store_temp_src, NOT_USED, 5),
};
static const struct sensor_device_attribute_2 sda_single_files[] = {
SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
store_chassis_clear, ALARM_STATUS, 46),
#ifdef CONFIG_SENSORS_W83795_FANCTRL
SENSOR_ATTR_2(speed_cruise_tolerance, S_IWUSR | S_IRUGO, show_fanin,
store_fanin, FANIN_TOL, NOT_USED),
SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
#endif
};
static const struct sensor_device_attribute_2 sda_beep_files[] = {
SENSOR_ATTR_2(intrusion0_beep, S_IWUSR | S_IRUGO, show_alarm_beep,
store_beep, BEEP_ENABLE, 46),
SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_alarm_beep,
store_beep, BEEP_ENABLE, 47),
};
/*
* Driver interface
*/
static void w83795_init_client(struct i2c_client *client)
{
struct w83795_data *data = i2c_get_clientdata(client);
static const u16 clkin[4] = { /* in kHz */
14318, 24000, 33333, 48000
};
u8 config;
if (reset)
w83795_write(client, W83795_REG_CONFIG, 0x80);
/* Start monitoring if needed */
config = w83795_read(client, W83795_REG_CONFIG);
if (!(config & W83795_REG_CONFIG_START)) {
dev_info(&client->dev, "Enabling monitoring operations\n");
w83795_write(client, W83795_REG_CONFIG,
config | W83795_REG_CONFIG_START);
}
data->clkin = clkin[(config >> 3) & 0x3];
dev_dbg(&client->dev, "clkin = %u kHz\n", data->clkin);
}
static int w83795_get_device_id(struct i2c_client *client)
{
int device_id;
device_id = i2c_smbus_read_byte_data(client, W83795_REG_DEVICEID);
/*
* Special case for rev. A chips; can't be checked first because later
* revisions emulate this for compatibility
*/
if (device_id < 0 || (device_id & 0xf0) != 0x50) {
int alt_id;
alt_id = i2c_smbus_read_byte_data(client,
W83795_REG_DEVICEID_A);
if (alt_id == 0x50)
device_id = alt_id;
}
return device_id;
}
/* Return 0 if detection is successful, -ENODEV otherwise */
static int w83795_detect(struct i2c_client *client,
struct i2c_board_info *info)
{
int bank, vendor_id, device_id, expected, i2c_addr, config;
struct i2c_adapter *adapter = client->adapter;
unsigned short address = client->addr;
const char *chip_name;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
if (bank < 0 || (bank & 0x7c)) {
dev_dbg(&adapter->dev,
"w83795: Detection failed at addr 0x%02hx, check %s\n",
address, "bank");
return -ENODEV;
}
/* Check Nuvoton vendor ID */
vendor_id = i2c_smbus_read_byte_data(client, W83795_REG_VENDORID);
expected = bank & 0x80 ? 0x5c : 0xa3;
if (vendor_id != expected) {
dev_dbg(&adapter->dev,
"w83795: Detection failed at addr 0x%02hx, check %s\n",
address, "vendor id");
return -ENODEV;
}
/* Check device ID */
device_id = w83795_get_device_id(client) |
(i2c_smbus_read_byte_data(client, W83795_REG_CHIPID) << 8);
if ((device_id >> 4) != 0x795) {
dev_dbg(&adapter->dev,
"w83795: Detection failed at addr 0x%02hx, check %s\n",
address, "device id\n");
return -ENODEV;
}
/*
* If Nuvoton chip, address of chip and W83795_REG_I2C_ADDR
* should match
*/
if ((bank & 0x07) == 0) {
i2c_addr = i2c_smbus_read_byte_data(client,
W83795_REG_I2C_ADDR);
if ((i2c_addr & 0x7f) != address) {
dev_dbg(&adapter->dev,
"w83795: Detection failed at addr 0x%02hx, "
"check %s\n", address, "i2c addr");
return -ENODEV;
}
}
/*
* Check 795 chip type: 795G or 795ADG
* Usually we don't write to chips during detection, but here we don't
* quite have the choice; hopefully it's OK, we are about to return
* success anyway
*/
if ((bank & 0x07) != 0)
i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL,
bank & ~0x07);
config = i2c_smbus_read_byte_data(client, W83795_REG_CONFIG);
if (config & W83795_REG_CONFIG_CONFIG48)
chip_name = "w83795adg";
else
chip_name = "w83795g";
strlcpy(info->type, chip_name, I2C_NAME_SIZE);
dev_info(&adapter->dev, "Found %s rev. %c at 0x%02hx\n", chip_name,
'A' + (device_id & 0xf), address);
return 0;
}
#ifdef CONFIG_SENSORS_W83795_FANCTRL
#define NUM_PWM_ATTRIBUTES ARRAY_SIZE(w83795_pwm[0])
#define NUM_TEMP_ATTRIBUTES ARRAY_SIZE(w83795_temp[0])
#else
#define NUM_PWM_ATTRIBUTES 4
#define NUM_TEMP_ATTRIBUTES 8
#endif
static int w83795_handle_files(struct device *dev, int (*fn)(struct device *,
const struct device_attribute *))
{
struct w83795_data *data = dev_get_drvdata(dev);
int err, i, j;
for (i = 0; i < ARRAY_SIZE(w83795_in); i++) {
if (!(data->has_in & (1 << i)))
continue;
for (j = 0; j < ARRAY_SIZE(w83795_in[0]); j++) {
if (j == 4 && !data->enable_beep)
continue;
err = fn(dev, &w83795_in[i][j].dev_attr);
if (err)
return err;
}
}
for (i = 0; i < ARRAY_SIZE(w83795_fan); i++) {
if (!(data->has_fan & (1 << i)))
continue;
for (j = 0; j < ARRAY_SIZE(w83795_fan[0]); j++) {
if (j == 3 && !data->enable_beep)
continue;
err = fn(dev, &w83795_fan[i][j].dev_attr);
if (err)
return err;
}
}
for (i = 0; i < ARRAY_SIZE(w83795_tss); i++) {
j = w83795_tss_useful(data, i);
if (!j)
continue;
err = fn(dev, &w83795_tss[i].dev_attr);
if (err)
return err;
}
for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
err = fn(dev, &sda_single_files[i].dev_attr);
if (err)
return err;
}
if (data->enable_beep) {
for (i = 0; i < ARRAY_SIZE(sda_beep_files); i++) {
err = fn(dev, &sda_beep_files[i].dev_attr);
if (err)
return err;
}
}
for (i = 0; i < data->has_pwm; i++) {
for (j = 0; j < NUM_PWM_ATTRIBUTES; j++) {
err = fn(dev, &w83795_pwm[i][j].dev_attr);
if (err)
return err;
}
}
for (i = 0; i < ARRAY_SIZE(w83795_temp); i++) {
if (!(data->has_temp & (1 << i)))
continue;
for (j = 0; j < NUM_TEMP_ATTRIBUTES; j++) {
if (j == 7 && !data->enable_beep)
continue;
err = fn(dev, &w83795_temp[i][j].dev_attr);
if (err)
return err;
}
}
if (data->enable_dts) {
for (i = 0; i < ARRAY_SIZE(w83795_dts); i++) {
if (!(data->has_dts & (1 << i)))
continue;
for (j = 0; j < ARRAY_SIZE(w83795_dts[0]); j++) {
if (j == 7 && !data->enable_beep)
continue;
err = fn(dev, &w83795_dts[i][j].dev_attr);
if (err)
return err;
}
}
}
return 0;
}
/* We need a wrapper that fits in w83795_handle_files */
static int device_remove_file_wrapper(struct device *dev,
const struct device_attribute *attr)
{
device_remove_file(dev, attr);
return 0;
}
static void w83795_check_dynamic_in_limits(struct i2c_client *client)
{
struct w83795_data *data = i2c_get_clientdata(client);
u8 vid_ctl;
int i, err_max, err_min;
vid_ctl = w83795_read(client, W83795_REG_VID_CTRL);
/* Return immediately if VRM isn't configured */
if ((vid_ctl & 0x07) == 0x00 || (vid_ctl & 0x07) == 0x07)
return;
data->has_dyn_in = (vid_ctl >> 3) & 0x07;
for (i = 0; i < 2; i++) {
if (!(data->has_dyn_in & (1 << i)))
continue;
/* Voltage limits in dynamic mode, switch to read-only */
err_max = sysfs_chmod_file(&client->dev.kobj,
&w83795_in[i][2].dev_attr.attr,
S_IRUGO);
err_min = sysfs_chmod_file(&client->dev.kobj,
&w83795_in[i][3].dev_attr.attr,
S_IRUGO);
if (err_max || err_min)
dev_warn(&client->dev,
"Failed to set in%d limits read-only (%d, %d)\n",
i, err_max, err_min);
else
dev_info(&client->dev,
"in%d limits set dynamically from VID\n", i);
}
}
/* Check pins that can be used for either temperature or voltage monitoring */
static void w83795_apply_temp_config(struct w83795_data *data, u8 config,
int temp_chan, int in_chan)
{
/* config is a 2-bit value */
switch (config) {
case 0x2: /* Voltage monitoring */
data->has_in |= 1 << in_chan;
break;
case 0x1: /* Thermal diode */
if (temp_chan >= 4)
break;
data->temp_mode |= 1 << temp_chan;
/* fall through */
case 0x3: /* Thermistor */
data->has_temp |= 1 << temp_chan;
break;
}
}
static int w83795_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int i;
u8 tmp;
struct device *dev = &client->dev;
struct w83795_data *data;
int err;
data = devm_kzalloc(dev, sizeof(struct w83795_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(client, data);
data->chip_type = id->driver_data;
data->bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
mutex_init(&data->update_lock);
/* Initialize the chip */
w83795_init_client(client);
/* Check which voltages and fans are present */
data->has_in = w83795_read(client, W83795_REG_VOLT_CTRL1)
| (w83795_read(client, W83795_REG_VOLT_CTRL2) << 8);
data->has_fan = w83795_read(client, W83795_REG_FANIN_CTRL1)
| (w83795_read(client, W83795_REG_FANIN_CTRL2) << 8);
/* Check which analog temperatures and extra voltages are present */
tmp = w83795_read(client, W83795_REG_TEMP_CTRL1);
if (tmp & 0x20)
data->enable_dts = 1;
w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 5, 16);
w83795_apply_temp_config(data, tmp & 0x3, 4, 15);
tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
w83795_apply_temp_config(data, tmp >> 6, 3, 20);
w83795_apply_temp_config(data, (tmp >> 4) & 0x3, 2, 19);
w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 1, 18);
w83795_apply_temp_config(data, tmp & 0x3, 0, 17);
/* Check DTS enable status */
if (data->enable_dts) {
if (1 & w83795_read(client, W83795_REG_DTSC))
data->enable_dts |= 2;
data->has_dts = w83795_read(client, W83795_REG_DTSE);
}
/* Report PECI Tbase values */
if (data->enable_dts == 1) {
for (i = 0; i < 8; i++) {
if (!(data->has_dts & (1 << i)))
continue;
tmp = w83795_read(client, W83795_REG_PECI_TBASE(i));
dev_info(&client->dev,
"PECI agent %d Tbase temperature: %u\n",
i + 1, (unsigned int)tmp & 0x7f);
}
}
data->has_gain = w83795_read(client, W83795_REG_VMIGB_CTRL) & 0x0f;
/* pwm and smart fan */
if (data->chip_type == w83795g)
data->has_pwm = 8;
else
data->has_pwm = 2;
/* Check if BEEP pin is available */
if (data->chip_type == w83795g) {
/* The W83795G has a dedicated BEEP pin */
data->enable_beep = 1;
} else {
/*
* The W83795ADG has a shared pin for OVT# and BEEP, so you
* can't have both
*/
tmp = w83795_read(client, W83795_REG_OVT_CFG);
if ((tmp & OVT_CFG_SEL) == 0)
data->enable_beep = 1;
}
err = w83795_handle_files(dev, device_create_file);
if (err)
goto exit_remove;
if (data->chip_type == w83795g)
w83795_check_dynamic_in_limits(client);
data->hwmon_dev = hwmon_device_register(dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto exit_remove;
}
return 0;
exit_remove:
w83795_handle_files(dev, device_remove_file_wrapper);
return err;
}
static int w83795_remove(struct i2c_client *client)
{
struct w83795_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
w83795_handle_files(&client->dev, device_remove_file_wrapper);
return 0;
}
static const struct i2c_device_id w83795_id[] = {
{ "w83795g", w83795g },
{ "w83795adg", w83795adg },
{ }
};
MODULE_DEVICE_TABLE(i2c, w83795_id);
static struct i2c_driver w83795_driver = {
.driver = {
.name = "w83795",
},
.probe = w83795_probe,
.remove = w83795_remove,
.id_table = w83795_id,
.class = I2C_CLASS_HWMON,
.detect = w83795_detect,
.address_list = normal_i2c,
};
module_i2c_driver(w83795_driver);
MODULE_AUTHOR("Wei Song, Jean Delvare <jdelvare@suse.de>");
MODULE_DESCRIPTION("W83795G/ADG hardware monitoring driver");
MODULE_LICENSE("GPL");
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