| /* |
| * w83l786ng.c - Linux kernel driver for hardware monitoring |
| * Copyright (c) 2007 Kevin Lo <kevlo@kevlo.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 - 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 wchipid vendid i2c ISA |
| * w83l786ng 3 2 2 2 0x7b 0x5ca3 yes no |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/i2c.h> |
| #include <linux/hwmon.h> |
| #include <linux/hwmon-vid.h> |
| #include <linux/hwmon-sysfs.h> |
| #include <linux/err.h> |
| #include <linux/mutex.h> |
| #include <linux/jiffies.h> |
| |
| /* Addresses to scan */ |
| static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END }; |
| |
| /* Insmod parameters */ |
| |
| static bool reset; |
| module_param(reset, bool, 0); |
| MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended"); |
| |
| #define W83L786NG_REG_IN_MIN(nr) (0x2C + (nr) * 2) |
| #define W83L786NG_REG_IN_MAX(nr) (0x2B + (nr) * 2) |
| #define W83L786NG_REG_IN(nr) ((nr) + 0x20) |
| |
| #define W83L786NG_REG_FAN(nr) ((nr) + 0x28) |
| #define W83L786NG_REG_FAN_MIN(nr) ((nr) + 0x3B) |
| |
| #define W83L786NG_REG_CONFIG 0x40 |
| #define W83L786NG_REG_ALARM1 0x41 |
| #define W83L786NG_REG_ALARM2 0x42 |
| #define W83L786NG_REG_GPIO_EN 0x47 |
| #define W83L786NG_REG_MAN_ID2 0x4C |
| #define W83L786NG_REG_MAN_ID1 0x4D |
| #define W83L786NG_REG_CHIP_ID 0x4E |
| |
| #define W83L786NG_REG_DIODE 0x53 |
| #define W83L786NG_REG_FAN_DIV 0x54 |
| #define W83L786NG_REG_FAN_CFG 0x80 |
| |
| #define W83L786NG_REG_TOLERANCE 0x8D |
| |
| static const u8 W83L786NG_REG_TEMP[2][3] = { |
| { 0x25, /* TEMP 0 in DataSheet */ |
| 0x35, /* TEMP 0 Over in DataSheet */ |
| 0x36 }, /* TEMP 0 Hyst in DataSheet */ |
| { 0x26, /* TEMP 1 in DataSheet */ |
| 0x37, /* TEMP 1 Over in DataSheet */ |
| 0x38 } /* TEMP 1 Hyst in DataSheet */ |
| }; |
| |
| static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7}; |
| static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4}; |
| |
| /* FAN Duty Cycle, be used to control */ |
| static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87}; |
| |
| |
| 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); |
| } |
| |
| #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \ |
| ((val) == 255 ? 0 : \ |
| 1350000 / ((val) * (div)))) |
| |
| /* for temp */ |
| #define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (val) + 0x100 * 1000 \ |
| : (val)) / 1000, 0, 0xff)) |
| #define TEMP_FROM_REG(val) (((val) & 0x80 ? \ |
| (val) - 0x100 : (val)) * 1000) |
| |
| /* |
| * The analog voltage inputs have 8mV LSB. Since the sysfs output is |
| * in mV as would be measured on the chip input pin, need to just |
| * multiply/divide by 8 to translate from/to register values. |
| */ |
| #define IN_TO_REG(val) (clamp_val((((val) + 4) / 8), 0, 255)) |
| #define IN_FROM_REG(val) ((val) * 8) |
| |
| #define DIV_FROM_REG(val) (1 << (val)) |
| |
| static inline u8 |
| DIV_TO_REG(long val) |
| { |
| int i; |
| val = clamp_val(val, 1, 128) >> 1; |
| for (i = 0; i < 7; i++) { |
| if (val == 0) |
| break; |
| val >>= 1; |
| } |
| return (u8)i; |
| } |
| |
| struct w83l786ng_data { |
| struct device *hwmon_dev; |
| struct mutex update_lock; |
| char valid; /* !=0 if following fields are valid */ |
| unsigned long last_updated; /* In jiffies */ |
| unsigned long last_nonvolatile; /* In jiffies, last time we update the |
| * nonvolatile registers */ |
| |
| u8 in[3]; |
| u8 in_max[3]; |
| u8 in_min[3]; |
| u8 fan[2]; |
| u8 fan_div[2]; |
| u8 fan_min[2]; |
| u8 temp_type[2]; |
| u8 temp[2][3]; |
| u8 pwm[2]; |
| u8 pwm_mode[2]; /* 0->DC variable voltage |
| * 1->PWM variable duty cycle */ |
| |
| u8 pwm_enable[2]; /* 1->manual |
| * 2->thermal cruise (also called SmartFan I) */ |
| u8 tolerance[2]; |
| }; |
| |
| static int w83l786ng_probe(struct i2c_client *client, |
| const struct i2c_device_id *id); |
| static int w83l786ng_detect(struct i2c_client *client, |
| struct i2c_board_info *info); |
| static int w83l786ng_remove(struct i2c_client *client); |
| static void w83l786ng_init_client(struct i2c_client *client); |
| static struct w83l786ng_data *w83l786ng_update_device(struct device *dev); |
| |
| static const struct i2c_device_id w83l786ng_id[] = { |
| { "w83l786ng", 0 }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(i2c, w83l786ng_id); |
| |
| static struct i2c_driver w83l786ng_driver = { |
| .class = I2C_CLASS_HWMON, |
| .driver = { |
| .name = "w83l786ng", |
| }, |
| .probe = w83l786ng_probe, |
| .remove = w83l786ng_remove, |
| .id_table = w83l786ng_id, |
| .detect = w83l786ng_detect, |
| .address_list = normal_i2c, |
| }; |
| |
| static u8 |
| w83l786ng_read_value(struct i2c_client *client, u8 reg) |
| { |
| return i2c_smbus_read_byte_data(client, reg); |
| } |
| |
| static int |
| w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value) |
| { |
| return i2c_smbus_write_byte_data(client, reg, value); |
| } |
| |
| /* following are the sysfs callback functions */ |
| #define show_in_reg(reg) \ |
| static ssize_t \ |
| show_##reg(struct device *dev, struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| int nr = to_sensor_dev_attr(attr)->index; \ |
| struct w83l786ng_data *data = w83l786ng_update_device(dev); \ |
| return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \ |
| } |
| |
| show_in_reg(in) |
| show_in_reg(in_min) |
| show_in_reg(in_max) |
| |
| #define store_in_reg(REG, reg) \ |
| static ssize_t \ |
| store_in_##reg(struct device *dev, struct device_attribute *attr, \ |
| const char *buf, size_t count) \ |
| { \ |
| int nr = to_sensor_dev_attr(attr)->index; \ |
| struct i2c_client *client = to_i2c_client(dev); \ |
| struct w83l786ng_data *data = i2c_get_clientdata(client); \ |
| unsigned long val; \ |
| int err = kstrtoul(buf, 10, &val); \ |
| if (err) \ |
| return err; \ |
| mutex_lock(&data->update_lock); \ |
| data->in_##reg[nr] = IN_TO_REG(val); \ |
| w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \ |
| data->in_##reg[nr]); \ |
| mutex_unlock(&data->update_lock); \ |
| return count; \ |
| } |
| |
| store_in_reg(MIN, min) |
| store_in_reg(MAX, max) |
| |
| static struct sensor_device_attribute sda_in_input[] = { |
| SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0), |
| SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1), |
| SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2), |
| }; |
| |
| static struct sensor_device_attribute sda_in_min[] = { |
| SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0), |
| SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1), |
| SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2), |
| }; |
| |
| static struct sensor_device_attribute sda_in_max[] = { |
| SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0), |
| SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1), |
| SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2), |
| }; |
| |
| #define show_fan_reg(reg) \ |
| static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| int nr = to_sensor_dev_attr(attr)->index; \ |
| struct w83l786ng_data *data = w83l786ng_update_device(dev); \ |
| return sprintf(buf, "%d\n", \ |
| FAN_FROM_REG(data->fan[nr], DIV_FROM_REG(data->fan_div[nr]))); \ |
| } |
| |
| show_fan_reg(fan); |
| show_fan_reg(fan_min); |
| |
| static ssize_t |
| store_fan_min(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int nr = to_sensor_dev_attr(attr)->index; |
| struct i2c_client *client = to_i2c_client(dev); |
| struct w83l786ng_data *data = i2c_get_clientdata(client); |
| unsigned long val; |
| int err; |
| |
| err = kstrtoul(buf, 10, &val); |
| if (err) |
| return err; |
| |
| mutex_lock(&data->update_lock); |
| data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
| w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), |
| data->fan_min[nr]); |
| mutex_unlock(&data->update_lock); |
| |
| return count; |
| } |
| |
| static ssize_t |
| show_fan_div(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| int nr = to_sensor_dev_attr(attr)->index; |
| struct w83l786ng_data *data = w83l786ng_update_device(dev); |
| return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr])); |
| } |
| |
| /* |
| * Note: we save and restore the fan minimum here, because its value is |
| * determined in part by the fan divisor. This follows the principle of |
| * least surprise; the user doesn't expect the fan minimum to change just |
| * because the divisor changed. |
| */ |
| static ssize_t |
| store_fan_div(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int nr = to_sensor_dev_attr(attr)->index; |
| struct i2c_client *client = to_i2c_client(dev); |
| struct w83l786ng_data *data = i2c_get_clientdata(client); |
| |
| unsigned long min; |
| u8 tmp_fan_div; |
| u8 fan_div_reg; |
| u8 keep_mask = 0; |
| u8 new_shift = 0; |
| |
| unsigned long val; |
| int err; |
| |
| err = kstrtoul(buf, 10, &val); |
| if (err) |
| return err; |
| |
| /* Save fan_min */ |
| mutex_lock(&data->update_lock); |
| min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); |
| |
| data->fan_div[nr] = DIV_TO_REG(val); |
| |
| switch (nr) { |
| case 0: |
| keep_mask = 0xf8; |
| new_shift = 0; |
| break; |
| case 1: |
| keep_mask = 0x8f; |
| new_shift = 4; |
| break; |
| } |
| |
| fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV) |
| & keep_mask; |
| |
| tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask; |
| |
| w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV, |
| fan_div_reg | tmp_fan_div); |
| |
| /* Restore fan_min */ |
| data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); |
| w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), |
| data->fan_min[nr]); |
| mutex_unlock(&data->update_lock); |
| |
| return count; |
| } |
| |
| static struct sensor_device_attribute sda_fan_input[] = { |
| SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0), |
| SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1), |
| }; |
| |
| static struct sensor_device_attribute sda_fan_min[] = { |
| SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, |
| store_fan_min, 0), |
| SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, |
| store_fan_min, 1), |
| }; |
| |
| static struct sensor_device_attribute sda_fan_div[] = { |
| SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div, |
| store_fan_div, 0), |
| SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div, |
| store_fan_div, 1), |
| }; |
| |
| |
| /* read/write the temperature, includes measured value and limits */ |
| |
| 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 w83l786ng_data *data = w83l786ng_update_device(dev); |
| return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index])); |
| } |
| |
| 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 w83l786ng_data *data = i2c_get_clientdata(client); |
| long val; |
| int err; |
| |
| err = kstrtol(buf, 10, &val); |
| if (err) |
| return err; |
| |
| mutex_lock(&data->update_lock); |
| data->temp[nr][index] = TEMP_TO_REG(val); |
| w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index], |
| data->temp[nr][index]); |
| mutex_unlock(&data->update_lock); |
| |
| return count; |
| } |
| |
| static struct sensor_device_attribute_2 sda_temp_input[] = { |
| SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0), |
| SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0), |
| }; |
| |
| static struct sensor_device_attribute_2 sda_temp_max[] = { |
| SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, |
| show_temp, store_temp, 0, 1), |
| SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, |
| show_temp, store_temp, 1, 1), |
| }; |
| |
| static struct sensor_device_attribute_2 sda_temp_max_hyst[] = { |
| SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR, |
| show_temp, store_temp, 0, 2), |
| SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR, |
| show_temp, store_temp, 1, 2), |
| }; |
| |
| #define show_pwm_reg(reg) \ |
| static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct w83l786ng_data *data = w83l786ng_update_device(dev); \ |
| int nr = to_sensor_dev_attr(attr)->index; \ |
| return sprintf(buf, "%d\n", data->reg[nr]); \ |
| } |
| |
| show_pwm_reg(pwm_mode) |
| show_pwm_reg(pwm_enable) |
| show_pwm_reg(pwm) |
| |
| static ssize_t |
| store_pwm_mode(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int nr = to_sensor_dev_attr(attr)->index; |
| struct i2c_client *client = to_i2c_client(dev); |
| struct w83l786ng_data *data = i2c_get_clientdata(client); |
| u8 reg; |
| unsigned long val; |
| int err; |
| |
| err = kstrtoul(buf, 10, &val); |
| if (err) |
| return err; |
| |
| if (val > 1) |
| return -EINVAL; |
| mutex_lock(&data->update_lock); |
| data->pwm_mode[nr] = val; |
| reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); |
| reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]); |
| if (!val) |
| reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr]; |
| w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); |
| mutex_unlock(&data->update_lock); |
| return count; |
| } |
| |
| static ssize_t |
| store_pwm(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int nr = to_sensor_dev_attr(attr)->index; |
| struct i2c_client *client = to_i2c_client(dev); |
| struct w83l786ng_data *data = i2c_get_clientdata(client); |
| unsigned long val; |
| int err; |
| |
| err = kstrtoul(buf, 10, &val); |
| if (err) |
| return err; |
| val = clamp_val(val, 0, 255); |
| |
| mutex_lock(&data->update_lock); |
| data->pwm[nr] = val; |
| w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val); |
| mutex_unlock(&data->update_lock); |
| return count; |
| } |
| |
| static ssize_t |
| store_pwm_enable(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int nr = to_sensor_dev_attr(attr)->index; |
| struct i2c_client *client = to_i2c_client(dev); |
| struct w83l786ng_data *data = i2c_get_clientdata(client); |
| u8 reg; |
| unsigned long val; |
| int err; |
| |
| err = kstrtoul(buf, 10, &val); |
| if (err) |
| return err; |
| |
| if (!val || val > 2) /* only modes 1 and 2 are supported */ |
| return -EINVAL; |
| |
| mutex_lock(&data->update_lock); |
| reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); |
| data->pwm_enable[nr] = val; |
| reg &= ~(0x03 << W83L786NG_PWM_ENABLE_SHIFT[nr]); |
| reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr]; |
| w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); |
| mutex_unlock(&data->update_lock); |
| return count; |
| } |
| |
| static struct sensor_device_attribute sda_pwm[] = { |
| SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0), |
| SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1), |
| }; |
| |
| static struct sensor_device_attribute sda_pwm_mode[] = { |
| SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode, |
| store_pwm_mode, 0), |
| SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode, |
| store_pwm_mode, 1), |
| }; |
| |
| static struct sensor_device_attribute sda_pwm_enable[] = { |
| SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable, |
| store_pwm_enable, 0), |
| SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable, |
| store_pwm_enable, 1), |
| }; |
| |
| /* For Smart Fan I/Thermal Cruise and Smart Fan II */ |
| static ssize_t |
| show_tolerance(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| int nr = to_sensor_dev_attr(attr)->index; |
| struct w83l786ng_data *data = w83l786ng_update_device(dev); |
| return sprintf(buf, "%ld\n", (long)data->tolerance[nr]); |
| } |
| |
| static ssize_t |
| store_tolerance(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int nr = to_sensor_dev_attr(attr)->index; |
| struct i2c_client *client = to_i2c_client(dev); |
| struct w83l786ng_data *data = i2c_get_clientdata(client); |
| u8 tol_tmp, tol_mask; |
| unsigned long val; |
| int err; |
| |
| err = kstrtoul(buf, 10, &val); |
| if (err) |
| return err; |
| |
| mutex_lock(&data->update_lock); |
| tol_mask = w83l786ng_read_value(client, |
| W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0); |
| tol_tmp = clamp_val(val, 0, 15); |
| tol_tmp &= 0x0f; |
| data->tolerance[nr] = tol_tmp; |
| if (nr == 1) |
| tol_tmp <<= 4; |
| |
| w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE, |
| tol_mask | tol_tmp); |
| mutex_unlock(&data->update_lock); |
| return count; |
| } |
| |
| static struct sensor_device_attribute sda_tolerance[] = { |
| SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO, |
| show_tolerance, store_tolerance, 0), |
| SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO, |
| show_tolerance, store_tolerance, 1), |
| }; |
| |
| |
| #define IN_UNIT_ATTRS(X) \ |
| &sda_in_input[X].dev_attr.attr, \ |
| &sda_in_min[X].dev_attr.attr, \ |
| &sda_in_max[X].dev_attr.attr |
| |
| #define FAN_UNIT_ATTRS(X) \ |
| &sda_fan_input[X].dev_attr.attr, \ |
| &sda_fan_min[X].dev_attr.attr, \ |
| &sda_fan_div[X].dev_attr.attr |
| |
| #define TEMP_UNIT_ATTRS(X) \ |
| &sda_temp_input[X].dev_attr.attr, \ |
| &sda_temp_max[X].dev_attr.attr, \ |
| &sda_temp_max_hyst[X].dev_attr.attr |
| |
| #define PWM_UNIT_ATTRS(X) \ |
| &sda_pwm[X].dev_attr.attr, \ |
| &sda_pwm_mode[X].dev_attr.attr, \ |
| &sda_pwm_enable[X].dev_attr.attr |
| |
| #define TOLERANCE_UNIT_ATTRS(X) \ |
| &sda_tolerance[X].dev_attr.attr |
| |
| static struct attribute *w83l786ng_attributes[] = { |
| IN_UNIT_ATTRS(0), |
| IN_UNIT_ATTRS(1), |
| IN_UNIT_ATTRS(2), |
| FAN_UNIT_ATTRS(0), |
| FAN_UNIT_ATTRS(1), |
| TEMP_UNIT_ATTRS(0), |
| TEMP_UNIT_ATTRS(1), |
| PWM_UNIT_ATTRS(0), |
| PWM_UNIT_ATTRS(1), |
| TOLERANCE_UNIT_ATTRS(0), |
| TOLERANCE_UNIT_ATTRS(1), |
| NULL |
| }; |
| |
| static const struct attribute_group w83l786ng_group = { |
| .attrs = w83l786ng_attributes, |
| }; |
| |
| static int |
| w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info) |
| { |
| struct i2c_adapter *adapter = client->adapter; |
| u16 man_id; |
| u8 chip_id; |
| |
| if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
| return -ENODEV; |
| |
| /* Detection */ |
| if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) { |
| dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n", |
| client->addr); |
| return -ENODEV; |
| } |
| |
| /* Identification */ |
| man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) + |
| w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2); |
| chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID); |
| |
| if (man_id != 0x5CA3 || /* Winbond */ |
| chip_id != 0x80) { /* W83L786NG */ |
| dev_dbg(&adapter->dev, |
| "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n", |
| man_id, chip_id); |
| return -ENODEV; |
| } |
| |
| strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE); |
| |
| return 0; |
| } |
| |
| static int |
| w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id) |
| { |
| struct device *dev = &client->dev; |
| struct w83l786ng_data *data; |
| int i, err = 0; |
| u8 reg_tmp; |
| |
| data = devm_kzalloc(&client->dev, sizeof(struct w83l786ng_data), |
| GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| |
| i2c_set_clientdata(client, data); |
| mutex_init(&data->update_lock); |
| |
| /* Initialize the chip */ |
| w83l786ng_init_client(client); |
| |
| /* A few vars need to be filled upon startup */ |
| for (i = 0; i < 2; i++) { |
| data->fan_min[i] = w83l786ng_read_value(client, |
| W83L786NG_REG_FAN_MIN(i)); |
| } |
| |
| /* Update the fan divisor */ |
| reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); |
| data->fan_div[0] = reg_tmp & 0x07; |
| data->fan_div[1] = (reg_tmp >> 4) & 0x07; |
| |
| /* Register sysfs hooks */ |
| err = sysfs_create_group(&client->dev.kobj, &w83l786ng_group); |
| if (err) |
| goto exit_remove; |
| |
| data->hwmon_dev = hwmon_device_register(dev); |
| if (IS_ERR(data->hwmon_dev)) { |
| err = PTR_ERR(data->hwmon_dev); |
| goto exit_remove; |
| } |
| |
| return 0; |
| |
| /* Unregister sysfs hooks */ |
| |
| exit_remove: |
| sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); |
| return err; |
| } |
| |
| static int |
| w83l786ng_remove(struct i2c_client *client) |
| { |
| struct w83l786ng_data *data = i2c_get_clientdata(client); |
| |
| hwmon_device_unregister(data->hwmon_dev); |
| sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); |
| |
| return 0; |
| } |
| |
| static void |
| w83l786ng_init_client(struct i2c_client *client) |
| { |
| u8 tmp; |
| |
| if (reset) |
| w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80); |
| |
| /* Start monitoring */ |
| tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG); |
| if (!(tmp & 0x01)) |
| w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01); |
| } |
| |
| static struct w83l786ng_data *w83l786ng_update_device(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct w83l786ng_data *data = i2c_get_clientdata(client); |
| int i, j; |
| u8 reg_tmp, pwmcfg; |
| |
| mutex_lock(&data->update_lock); |
| if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
| || !data->valid) { |
| dev_dbg(&client->dev, "Updating w83l786ng data.\n"); |
| |
| /* Update the voltages measured value and limits */ |
| for (i = 0; i < 3; i++) { |
| data->in[i] = w83l786ng_read_value(client, |
| W83L786NG_REG_IN(i)); |
| data->in_min[i] = w83l786ng_read_value(client, |
| W83L786NG_REG_IN_MIN(i)); |
| data->in_max[i] = w83l786ng_read_value(client, |
| W83L786NG_REG_IN_MAX(i)); |
| } |
| |
| /* Update the fan counts and limits */ |
| for (i = 0; i < 2; i++) { |
| data->fan[i] = w83l786ng_read_value(client, |
| W83L786NG_REG_FAN(i)); |
| data->fan_min[i] = w83l786ng_read_value(client, |
| W83L786NG_REG_FAN_MIN(i)); |
| } |
| |
| /* Update the fan divisor */ |
| reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); |
| data->fan_div[0] = reg_tmp & 0x07; |
| data->fan_div[1] = (reg_tmp >> 4) & 0x07; |
| |
| pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); |
| for (i = 0; i < 2; i++) { |
| data->pwm_mode[i] = |
| ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1) |
| ? 0 : 1; |
| data->pwm_enable[i] = |
| ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 3) + 1; |
| data->pwm[i] = w83l786ng_read_value(client, |
| W83L786NG_REG_PWM[i]); |
| } |
| |
| |
| /* Update the temperature sensors */ |
| for (i = 0; i < 2; i++) { |
| for (j = 0; j < 3; j++) { |
| data->temp[i][j] = w83l786ng_read_value(client, |
| W83L786NG_REG_TEMP[i][j]); |
| } |
| } |
| |
| /* Update Smart Fan I/II tolerance */ |
| reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE); |
| data->tolerance[0] = reg_tmp & 0x0f; |
| data->tolerance[1] = (reg_tmp >> 4) & 0x0f; |
| |
| data->last_updated = jiffies; |
| data->valid = 1; |
| |
| } |
| |
| mutex_unlock(&data->update_lock); |
| |
| return data; |
| } |
| |
| module_i2c_driver(w83l786ng_driver); |
| |
| MODULE_AUTHOR("Kevin Lo"); |
| MODULE_DESCRIPTION("w83l786ng driver"); |
| MODULE_LICENSE("GPL"); |