diff options
Diffstat (limited to 'drivers/hwmon/adt7473.c')
| -rw-r--r-- | drivers/hwmon/adt7473.c | 1189 |
1 files changed, 1189 insertions, 0 deletions
diff --git a/drivers/hwmon/adt7473.c b/drivers/hwmon/adt7473.c new file mode 100644 index 0000000..18aa308 --- /dev/null +++ b/drivers/hwmon/adt7473.c @@ -0,0 +1,1189 @@ +/* + * A hwmon driver for the Analog Devices ADT7473 + * Copyright (C) 2007 IBM + * + * Author: Darrick J. Wong <djwong@us.ibm.com> + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/module.h> +#include <linux/jiffies.h> +#include <linux/i2c.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/err.h> +#include <linux/mutex.h> +#include <linux/delay.h> +#include <linux/log2.h> + +/* Addresses to scan */ +static const unsigned short normal_i2c[] = { 0x2C, 0x2D, 0x2E, I2C_CLIENT_END }; + +/* Insmod parameters */ +I2C_CLIENT_INSMOD_1(adt7473); + +/* ADT7473 registers */ +#define ADT7473_REG_BASE_ADDR 0x20 + +#define ADT7473_REG_VOLT_BASE_ADDR 0x21 +#define ADT7473_REG_VOLT_MIN_BASE_ADDR 0x46 + +#define ADT7473_REG_TEMP_BASE_ADDR 0x25 +#define ADT7473_REG_TEMP_LIMITS_BASE_ADDR 0x4E +#define ADT7473_REG_TEMP_TMIN_BASE_ADDR 0x67 +#define ADT7473_REG_TEMP_TMAX_BASE_ADDR 0x6A + +#define ADT7473_REG_FAN_BASE_ADDR 0x28 +#define ADT7473_REG_FAN_MIN_BASE_ADDR 0x54 + +#define ADT7473_REG_PWM_BASE_ADDR 0x30 +#define ADT7473_REG_PWM_MIN_BASE_ADDR 0x64 +#define ADT7473_REG_PWM_MAX_BASE_ADDR 0x38 +#define ADT7473_REG_PWM_BHVR_BASE_ADDR 0x5C +#define ADT7473_PWM_BHVR_MASK 0xE0 +#define ADT7473_PWM_BHVR_SHIFT 5 + +#define ADT7473_REG_CFG1 0x40 +#define ADT7473_CFG1_START 0x01 +#define ADT7473_CFG1_READY 0x04 +#define ADT7473_REG_CFG2 0x73 +#define ADT7473_REG_CFG3 0x78 +#define ADT7473_REG_CFG4 0x7D +#define ADT7473_CFG4_MAX_DUTY_AT_OVT 0x08 +#define ADT7473_REG_CFG5 0x7C +#define ADT7473_CFG5_TEMP_TWOS 0x01 +#define ADT7473_CFG5_TEMP_OFFSET 0x02 + +#define ADT7473_REG_DEVICE 0x3D +#define ADT7473_VENDOR 0x41 +#define ADT7473_REG_VENDOR 0x3E +#define ADT7473_DEVICE 0x73 +#define ADT7473_REG_REVISION 0x3F +#define ADT7473_REV_68 0x68 +#define ADT7473_REV_69 0x69 + +#define ADT7473_REG_ALARM1 0x41 +#define ADT7473_VCCP_ALARM 0x02 +#define ADT7473_VCC_ALARM 0x04 +#define ADT7473_R1T_ALARM 0x10 +#define ADT7473_LT_ALARM 0x20 +#define ADT7473_R2T_ALARM 0x40 +#define ADT7473_OOL 0x80 +#define ADT7473_REG_ALARM2 0x42 +#define ADT7473_OVT_ALARM 0x02 +#define ADT7473_FAN1_ALARM 0x04 +#define ADT7473_FAN2_ALARM 0x08 +#define ADT7473_FAN3_ALARM 0x10 +#define ADT7473_FAN4_ALARM 0x20 +#define ADT7473_R1T_SHORT 0x40 +#define ADT7473_R2T_SHORT 0x80 + +#define ALARM2(x) ((x) << 8) + +#define ADT7473_VOLT_COUNT 2 +#define ADT7473_REG_VOLT(x) (ADT7473_REG_VOLT_BASE_ADDR + (x)) +#define ADT7473_REG_VOLT_MIN(x) (ADT7473_REG_VOLT_MIN_BASE_ADDR + ((x) * 2)) +#define ADT7473_REG_VOLT_MAX(x) (ADT7473_REG_VOLT_MIN_BASE_ADDR + \ + ((x) * 2) + 1) + +#define ADT7473_TEMP_COUNT 3 +#define ADT7473_REG_TEMP(x) (ADT7473_REG_TEMP_BASE_ADDR + (x)) +#define ADT7473_REG_TEMP_MIN(x) (ADT7473_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2)) +#define ADT7473_REG_TEMP_MAX(x) (ADT7473_REG_TEMP_LIMITS_BASE_ADDR + \ + ((x) * 2) + 1) +#define ADT7473_REG_TEMP_TMIN(x) (ADT7473_REG_TEMP_TMIN_BASE_ADDR + (x)) +#define ADT7473_REG_TEMP_TMAX(x) (ADT7473_REG_TEMP_TMAX_BASE_ADDR + (x)) + +#define ADT7473_FAN_COUNT 4 +#define ADT7473_REG_FAN(x) (ADT7473_REG_FAN_BASE_ADDR + ((x) * 2)) +#define ADT7473_REG_FAN_MIN(x) (ADT7473_REG_FAN_MIN_BASE_ADDR + ((x) * 2)) + +#define ADT7473_PWM_COUNT 3 +#define ADT7473_REG_PWM(x) (ADT7473_REG_PWM_BASE_ADDR + (x)) +#define ADT7473_REG_PWM_MAX(x) (ADT7473_REG_PWM_MAX_BASE_ADDR + (x)) +#define ADT7473_REG_PWM_MIN(x) (ADT7473_REG_PWM_MIN_BASE_ADDR + (x)) +#define ADT7473_REG_PWM_BHVR(x) (ADT7473_REG_PWM_BHVR_BASE_ADDR + (x)) + +/* How often do we reread sensors values? (In jiffies) */ +#define SENSOR_REFRESH_INTERVAL (2 * HZ) + +/* How often do we reread sensor limit values? (In jiffies) */ +#define LIMIT_REFRESH_INTERVAL (60 * HZ) + +/* datasheet says to divide this number by the fan reading to get fan rpm */ +#define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x)) +#define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM +#define FAN_PERIOD_INVALID 65535 +#define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID) + +#define ROUND_DIV(x, divisor) (((x) + ((divisor) / 2)) / (divisor)) + +struct adt7473_data { + struct device *hwmon_dev; + struct attribute_group attrs; + struct mutex lock; + char sensors_valid; + char limits_valid; + unsigned long sensors_last_updated; /* In jiffies */ + unsigned long limits_last_updated; /* In jiffies */ + + u8 volt[ADT7473_VOLT_COUNT]; + s8 volt_min[ADT7473_VOLT_COUNT]; + s8 volt_max[ADT7473_VOLT_COUNT]; + + s8 temp[ADT7473_TEMP_COUNT]; + s8 temp_min[ADT7473_TEMP_COUNT]; + s8 temp_max[ADT7473_TEMP_COUNT]; + s8 temp_tmin[ADT7473_TEMP_COUNT]; + /* This is called the !THERM limit in the datasheet */ + s8 temp_tmax[ADT7473_TEMP_COUNT]; + + u16 fan[ADT7473_FAN_COUNT]; + u16 fan_min[ADT7473_FAN_COUNT]; + + u8 pwm[ADT7473_PWM_COUNT]; + u8 pwm_max[ADT7473_PWM_COUNT]; + u8 pwm_min[ADT7473_PWM_COUNT]; + u8 pwm_behavior[ADT7473_PWM_COUNT]; + + u8 temp_twos_complement; + u8 temp_offset; + + u16 alarm; + u8 max_duty_at_overheat; +}; + +static int adt7473_probe(struct i2c_client *client, + const struct i2c_device_id *id); +static int adt7473_detect(struct i2c_client *client, int kind, + struct i2c_board_info *info); +static int adt7473_remove(struct i2c_client *client); + +static const struct i2c_device_id adt7473_id[] = { + { "adt7473", adt7473 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, adt7473_id); + +static struct i2c_driver adt7473_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "adt7473", + }, + .probe = adt7473_probe, + .remove = adt7473_remove, + .id_table = adt7473_id, + .detect = adt7473_detect, + .address_data = &addr_data, +}; + +/* + * 16-bit registers on the ADT7473 are low-byte first. The data sheet says + * that the low byte must be read before the high byte. + */ +static inline int adt7473_read_word_data(struct i2c_client *client, u8 reg) +{ + u16 foo; + foo = i2c_smbus_read_byte_data(client, reg); + foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8); + return foo; +} + +static inline int adt7473_write_word_data(struct i2c_client *client, u8 reg, + u16 value) +{ + return i2c_smbus_write_byte_data(client, reg, value & 0xFF) + && i2c_smbus_write_byte_data(client, reg + 1, value >> 8); +} + +static void adt7473_init_client(struct i2c_client *client) +{ + int reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG1); + + if (!(reg & ADT7473_CFG1_READY)) { + dev_err(&client->dev, "Chip not ready.\n"); + } else { + /* start monitoring */ + i2c_smbus_write_byte_data(client, ADT7473_REG_CFG1, + reg | ADT7473_CFG1_START); + } +} + +static struct adt7473_data *adt7473_update_device(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct adt7473_data *data = i2c_get_clientdata(client); + unsigned long local_jiffies = jiffies; + u8 cfg; + int i; + + mutex_lock(&data->lock); + if (time_before(local_jiffies, data->sensors_last_updated + + SENSOR_REFRESH_INTERVAL) + && data->sensors_valid) + goto no_sensor_update; + + for (i = 0; i < ADT7473_VOLT_COUNT; i++) + data->volt[i] = i2c_smbus_read_byte_data(client, + ADT7473_REG_VOLT(i)); + + /* Determine temperature encoding */ + cfg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG5); + data->temp_twos_complement = (cfg & ADT7473_CFG5_TEMP_TWOS); + + /* + * What does this do? it implies a variable temperature sensor + * offset, but the datasheet doesn't say anything about this bit + * and other parts of the datasheet imply that "offset64" mode + * means that you shift temp values by -64 if the above bit was set. + */ + data->temp_offset = (cfg & ADT7473_CFG5_TEMP_OFFSET); + + for (i = 0; i < ADT7473_TEMP_COUNT; i++) + data->temp[i] = i2c_smbus_read_byte_data(client, + ADT7473_REG_TEMP(i)); + + for (i = 0; i < ADT7473_FAN_COUNT; i++) + data->fan[i] = adt7473_read_word_data(client, + ADT7473_REG_FAN(i)); + + for (i = 0; i < ADT7473_PWM_COUNT; i++) + data->pwm[i] = i2c_smbus_read_byte_data(client, + ADT7473_REG_PWM(i)); + + data->alarm = i2c_smbus_read_byte_data(client, ADT7473_REG_ALARM1); + if (data->alarm & ADT7473_OOL) + data->alarm |= ALARM2(i2c_smbus_read_byte_data(client, + ADT7473_REG_ALARM2)); + + data->sensors_last_updated = local_jiffies; + data->sensors_valid = 1; + +no_sensor_update: + if (time_before(local_jiffies, data->limits_last_updated + + LIMIT_REFRESH_INTERVAL) + && data->limits_valid) + goto out; + + for (i = 0; i < ADT7473_VOLT_COUNT; i++) { + data->volt_min[i] = i2c_smbus_read_byte_data(client, + ADT7473_REG_VOLT_MIN(i)); + data->volt_max[i] = i2c_smbus_read_byte_data(client, + ADT7473_REG_VOLT_MAX(i)); + } + + for (i = 0; i < ADT7473_TEMP_COUNT; i++) { + data->temp_min[i] = i2c_smbus_read_byte_data(client, + ADT7473_REG_TEMP_MIN(i)); + data->temp_max[i] = i2c_smbus_read_byte_data(client, + ADT7473_REG_TEMP_MAX(i)); + data->temp_tmin[i] = i2c_smbus_read_byte_data(client, + ADT7473_REG_TEMP_TMIN(i)); + data->temp_tmax[i] = i2c_smbus_read_byte_data(client, + ADT7473_REG_TEMP_TMAX(i)); + } + + for (i = 0; i < ADT7473_FAN_COUNT; i++) + data->fan_min[i] = adt7473_read_word_data(client, + ADT7473_REG_FAN_MIN(i)); + + for (i = 0; i < ADT7473_PWM_COUNT; i++) { + data->pwm_max[i] = i2c_smbus_read_byte_data(client, + ADT7473_REG_PWM_MAX(i)); + data->pwm_min[i] = i2c_smbus_read_byte_data(client, + ADT7473_REG_PWM_MIN(i)); + data->pwm_behavior[i] = i2c_smbus_read_byte_data(client, + ADT7473_REG_PWM_BHVR(i)); + } + + i = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4); + data->max_duty_at_overheat = !!(i & ADT7473_CFG4_MAX_DUTY_AT_OVT); + + data->limits_last_updated = local_jiffies; + data->limits_valid = 1; + +out: + mutex_unlock(&data->lock); + return data; +} + +/* + * Conversions + */ + +/* IN are scaled acording to built-in resistors */ +static const int adt7473_scaling[] = { /* .001 Volts */ + 2250, 3300 +}; +#define SCALE(val, from, to) (((val) * (to) + ((from) / 2)) / (from)) + +static int decode_volt(int volt_index, u8 raw) +{ + return SCALE(raw, 192, adt7473_scaling[volt_index]); +} + +static u8 encode_volt(int volt_index, int cooked) +{ + int raw = SCALE(cooked, adt7473_scaling[volt_index], 192); + return SENSORS_LIMIT(raw, 0, 255); +} + +static ssize_t show_volt_min(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + return sprintf(buf, "%d\n", + decode_volt(attr->index, data->volt_min[attr->index])); +} + +static ssize_t set_volt_min(struct device *dev, + struct device_attribute *devattr, + const char *buf, + size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct i2c_client *client = to_i2c_client(dev); + struct adt7473_data *data = i2c_get_clientdata(client); + long volt; + + if (strict_strtol(buf, 10, &volt)) + return -EINVAL; + + volt = encode_volt(attr->index, volt); + + mutex_lock(&data->lock); + data->volt_min[attr->index] = volt; + i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MIN(attr->index), + volt); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t show_volt_max(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + return sprintf(buf, "%d\n", + decode_volt(attr->index, data->volt_max[attr->index])); +} + +static ssize_t set_volt_max(struct device *dev, + struct device_attribute *devattr, + const char *buf, + size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct i2c_client *client = to_i2c_client(dev); + struct adt7473_data *data = i2c_get_clientdata(client); + long volt; + + if (strict_strtol(buf, 10, &volt)) + return -EINVAL; + + volt = encode_volt(attr->index, volt); + + mutex_lock(&data->lock); + data->volt_max[attr->index] = volt; + i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MAX(attr->index), + volt); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t show_volt(struct device *dev, struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + + return sprintf(buf, "%d\n", + decode_volt(attr->index, data->volt[attr->index])); +} + +/* + * This chip can report temperature data either as a two's complement + * number in the range -128 to 127, or as an unsigned number that must + * be offset by 64. + */ +static int decode_temp(u8 twos_complement, u8 raw) +{ + return twos_complement ? (s8)raw : raw - 64; +} + +static u8 encode_temp(u8 twos_complement, int cooked) +{ + u8 ret = twos_complement ? cooked & 0xFF : cooked + 64; + return SENSORS_LIMIT(ret, 0, 255); +} + +static ssize_t show_temp_min(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + return sprintf(buf, "%d\n", 1000 * decode_temp( + data->temp_twos_complement, + data->temp_min[attr->index])); +} + +static ssize_t set_temp_min(struct device *dev, + struct device_attribute *devattr, + const char *buf, + size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct i2c_client *client = to_i2c_client(dev); + struct adt7473_data *data = i2c_get_clientdata(client); + long temp; + + if (strict_strtol(buf, 10, &temp)) + return -EINVAL; + + temp = ROUND_DIV(temp, 1000); + temp = encode_temp(data->temp_twos_complement, temp); + + mutex_lock(&data->lock); + data->temp_min[attr->index] = temp; + i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MIN(attr->index), + temp); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t show_temp_max(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + return sprintf(buf, "%d\n", 1000 * decode_temp( + data->temp_twos_complement, + data->temp_max[attr->index])); +} + +static ssize_t set_temp_max(struct device *dev, + struct device_attribute *devattr, + const char *buf, + size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct i2c_client *client = to_i2c_client(dev); + struct adt7473_data *data = i2c_get_clientdata(client); + long temp; + + if (strict_strtol(buf, 10, &temp)) + return -EINVAL; + + temp = ROUND_DIV(temp, 1000); + temp = encode_temp(data->temp_twos_complement, temp); + + mutex_lock(&data->lock); + data->temp_max[attr->index] = temp; + i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MAX(attr->index), + temp); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t show_temp(struct device *dev, struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + return sprintf(buf, "%d\n", 1000 * decode_temp( + data->temp_twos_complement, + data->temp[attr->index])); +} + +static ssize_t show_fan_min(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + + if (FAN_DATA_VALID(data->fan_min[attr->index])) + return sprintf(buf, "%d\n", + FAN_PERIOD_TO_RPM(data->fan_min[attr->index])); + else + return sprintf(buf, "0\n"); +} + +static ssize_t set_fan_min(struct device *dev, + struct device_attribute *devattr, + const char *buf, size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct i2c_client *client = to_i2c_client(dev); + struct adt7473_data *data = i2c_get_clientdata(client); + long temp; + + if (strict_strtol(buf, 10, &temp) || !temp) + return -EINVAL; + + temp = FAN_RPM_TO_PERIOD(temp); + temp = SENSORS_LIMIT(temp, 1, 65534); + + mutex_lock(&data->lock); + data->fan_min[attr->index] = temp; + adt7473_write_word_data(client, ADT7473_REG_FAN_MIN(attr->index), temp); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + + if (FAN_DATA_VALID(data->fan[attr->index])) + return sprintf(buf, "%d\n", + FAN_PERIOD_TO_RPM(data->fan[attr->index])); + else + return sprintf(buf, "0\n"); +} + +static ssize_t show_max_duty_at_crit(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct adt7473_data *data = adt7473_update_device(dev); + return sprintf(buf, "%d\n", data->max_duty_at_overheat); +} + +static ssize_t set_max_duty_at_crit(struct device *dev, + struct device_attribute *devattr, + const char *buf, + size_t count) +{ + u8 reg; + struct i2c_client *client = to_i2c_client(dev); + struct adt7473_data *data = i2c_get_clientdata(client); + long temp; + + if (strict_strtol(buf, 10, &temp)) + return -EINVAL; + + mutex_lock(&data->lock); + data->max_duty_at_overheat = !!temp; + reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4); + if (temp) + reg |= ADT7473_CFG4_MAX_DUTY_AT_OVT; + else + reg &= ~ADT7473_CFG4_MAX_DUTY_AT_OVT; + i2c_smbus_write_byte_data(client, ADT7473_REG_CFG4, reg); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + return sprintf(buf, "%d\n", data->pwm[attr->index]); +} + +static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr, + const char *buf, size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct i2c_client *client = to_i2c_client(dev); + struct adt7473_data *data = i2c_get_clientdata(client); + long temp; + + if (strict_strtol(buf, 10, &temp)) + return -EINVAL; + + temp = SENSORS_LIMIT(temp, 0, 255); + + mutex_lock(&data->lock); + data->pwm[attr->index] = temp; + i2c_smbus_write_byte_data(client, ADT7473_REG_PWM(attr->index), temp); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t show_pwm_max(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + return sprintf(buf, "%d\n", data->pwm_max[attr->index]); +} + +static ssize_t set_pwm_max(struct device *dev, + struct device_attribute *devattr, + const char *buf, + size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct i2c_client *client = to_i2c_client(dev); + struct adt7473_data *data = i2c_get_clientdata(client); + long temp; + + if (strict_strtol(buf, 10, &temp)) + return -EINVAL; + + temp = SENSORS_LIMIT(temp, 0, 255); + + mutex_lock(&data->lock); + data->pwm_max[attr->index] = temp; + i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MAX(attr->index), + temp); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t show_pwm_min(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + return sprintf(buf, "%d\n", data->pwm_min[attr->index]); +} + +static ssize_t set_pwm_min(struct device *dev, + struct device_attribute *devattr, + const char *buf, + size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct i2c_client *client = to_i2c_client(dev); + struct adt7473_data *data = i2c_get_clientdata(client); + long temp; + + if (strict_strtol(buf, 10, &temp)) + return -EINVAL; + + temp = SENSORS_LIMIT(temp, 0, 255); + + mutex_lock(&data->lock); + data->pwm_min[attr->index] = temp; + i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MIN(attr->index), + temp); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t show_temp_tmax(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + return sprintf(buf, "%d\n", 1000 * decode_temp( + data->temp_twos_complement, + data->temp_tmax[attr->index])); +} + +static ssize_t set_temp_tmax(struct device *dev, + struct device_attribute *devattr, + const char *buf, + size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct i2c_client *client = to_i2c_client(dev); + struct adt7473_data *data = i2c_get_clientdata(client); + long temp; + + if (strict_strtol(buf, 10, &temp)) + return -EINVAL; + + temp = ROUND_DIV(temp, 1000); + temp = encode_temp(data->temp_twos_complement, temp); + + mutex_lock(&data->lock); + data->temp_tmax[attr->index] = temp; + i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMAX(attr->index), + temp); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t show_temp_tmin(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + return sprintf(buf, "%d\n", 1000 * decode_temp( + data->temp_twos_complement, + data->temp_tmin[attr->index])); +} + +static ssize_t set_temp_tmin(struct device *dev, + struct device_attribute *devattr, + const char *buf, + size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct i2c_client *client = to_i2c_client(dev); + struct adt7473_data *data = i2c_get_clientdata(client); + long temp; + + if (strict_strtol(buf, 10, &temp)) + return -EINVAL; + + temp = ROUND_DIV(temp, 1000); + temp = encode_temp(data->temp_twos_complement, temp); + + mutex_lock(&data->lock); + data->temp_tmin[attr->index] = temp; + i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMIN(attr->index), + temp); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t show_pwm_enable(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + + switch (data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT) { + case 3: + return sprintf(buf, "0\n"); + case 7: + return sprintf(buf, "1\n"); + default: + return sprintf(buf, "2\n"); + } +} + +static ssize_t set_pwm_enable(struct device *dev, + struct device_attribute *devattr, + const char *buf, + size_t count) +{ + u8 reg; + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct i2c_client *client = to_i2c_client(dev); + struct adt7473_data *data = i2c_get_clientdata(client); + long temp; + + if (strict_strtol(buf, 10, &temp)) + return -EINVAL; + + switch (temp) { + case 0: + temp = 3; + break; + case 1: + temp = 7; + break; + case 2: + /* Enter automatic mode with fans off */ + temp = 4; + break; + default: + return -EINVAL; + } + + mutex_lock(&data->lock); + reg = i2c_smbus_read_byte_data(client, + ADT7473_REG_PWM_BHVR(attr->index)); + reg = (temp << ADT7473_PWM_BHVR_SHIFT) | + (reg & ~ADT7473_PWM_BHVR_MASK); + i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index), + reg); + data->pwm_behavior[attr->index] = reg; + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t show_pwm_auto_temp(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + int bhvr = data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT; + + switch (bhvr) { + case 3: + case 4: + case 7: + return sprintf(buf, "0\n"); + case 0: + case 1: + case 5: + case 6: + return sprintf(buf, "%d\n", bhvr + 1); + case 2: + return sprintf(buf, "4\n"); + } + /* shouldn't ever get here */ + BUG(); +} + +static ssize_t set_pwm_auto_temp(struct device *dev, + struct device_attribute *devattr, + const char *buf, + size_t count) +{ + u8 reg; + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct i2c_client *client = to_i2c_client(dev); + struct adt7473_data *data = i2c_get_clientdata(client); + long temp; + + if (strict_strtol(buf, 10, &temp)) + return -EINVAL; + + switch (temp) { + case 1: + case 2: + case 6: + case 7: + temp--; + break; + case 0: + temp = 4; + break; + default: + return -EINVAL; + } + + mutex_lock(&data->lock); + reg = i2c_smbus_read_byte_data(client, + ADT7473_REG_PWM_BHVR(attr->index)); + reg = (temp << ADT7473_PWM_BHVR_SHIFT) | + (reg & ~ADT7473_PWM_BHVR_MASK); + i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index), + reg); + data->pwm_behavior[attr->index] = reg; + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t show_alarm(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct adt7473_data *data = adt7473_update_device(dev); + + if (data->alarm & attr->index) + return sprintf(buf, "1\n"); + else + return sprintf(buf, "0\n"); +} + + +static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_volt_max, + set_volt_max, 0); +static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_volt_max, + set_volt_max, 1); + +static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_volt_min, + set_volt_min, 0); +static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_volt_min, + set_volt_min, 1); + +static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_volt, NULL, 0); +static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_volt, NULL, 1); + +static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, + ADT7473_VCCP_ALARM); +static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, + ADT7473_VCC_ALARM); + +static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, + set_temp_max, 0); +static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max, + set_temp_max, 1); +static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max, + set_temp_max, 2); + +static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min, + set_temp_min, 0); +static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min, + set_temp_min, 1); +static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min, + set_temp_min, 2); + +static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); +static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); +static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); + +static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, + ADT7473_R1T_ALARM | ALARM2(ADT7473_R1T_SHORT)); +static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, + ADT7473_LT_ALARM); +static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, + ADT7473_R2T_ALARM | ALARM2(ADT7473_R2T_SHORT)); + +static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, + set_fan_min, 0); +static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, + set_fan_min, 1); +static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min, + set_fan_min, 2); +static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min, + set_fan_min, 3); + +static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); +static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); +static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); +static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3); + +static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, + ALARM2(ADT7473_FAN1_ALARM)); +static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, + ALARM2(ADT7473_FAN2_ALARM)); +static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, + ALARM2(ADT7473_FAN3_ALARM)); +static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, + ALARM2(ADT7473_FAN4_ALARM)); + +static SENSOR_DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO, + show_max_duty_at_crit, set_max_duty_at_crit, 0); + +static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0); +static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1); +static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2); + +static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO, + show_pwm_min, set_pwm_min, 0); +static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO, + show_pwm_min, set_pwm_min, 1); +static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO, + show_pwm_min, set_pwm_min, 2); + +static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO, + show_pwm_max, set_pwm_max, 0); +static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO, + show_pwm_max, set_pwm_max, 1); +static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO, + show_pwm_max, set_pwm_max, 2); + +static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, S_IWUSR | S_IRUGO, + show_temp_tmin, set_temp_tmin, 0); +static SENSOR_DEVICE_ATTR(temp2_auto_point1_temp, S_IWUSR | S_IRUGO, + show_temp_tmin, set_temp_tmin, 1); +static SENSOR_DEVICE_ATTR(temp3_auto_point1_temp, S_IWUSR | S_IRUGO, + show_temp_tmin, set_temp_tmin, 2); + +static SENSOR_DEVICE_ATTR(temp1_auto_point2_temp, S_IWUSR | S_IRUGO, + show_temp_tmax, set_temp_tmax, 0); +static SENSOR_DEVICE_ATTR(temp2_auto_point2_temp, S_IWUSR | S_IRUGO, + show_temp_tmax, set_temp_tmax, 1); +static SENSOR_DEVICE_ATTR(temp3_auto_point2_temp, S_IWUSR | S_IRUGO, + show_temp_tmax, set_temp_tmax, 2); + +static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable, + set_pwm_enable, 0); +static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable, + set_pwm_enable, 1); +static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_enable, + set_pwm_enable, 2); + +static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO, + show_pwm_auto_temp, set_pwm_auto_temp, 0); +static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO, + show_pwm_auto_temp, set_pwm_auto_temp, 1); +static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO, + show_pwm_auto_temp, set_pwm_auto_temp, 2); + +static struct attribute *adt7473_attr[] = +{ + &sensor_dev_attr_in1_max.dev_attr.attr, + &sensor_dev_attr_in2_max.dev_attr.attr, + &sensor_dev_attr_in1_min.dev_attr.attr, + &sensor_dev_attr_in2_min.dev_attr.attr, + &sensor_dev_attr_in1_input.dev_attr.attr, + &sensor_dev_attr_in2_input.dev_attr.attr, + &sensor_dev_attr_in1_alarm.dev_attr.attr, + &sensor_dev_attr_in2_alarm.dev_attr.attr, + + &sensor_dev_attr_temp1_max.dev_attr.attr, + &sensor_dev_attr_temp2_max.dev_attr.attr, + &sensor_dev_attr_temp3_max.dev_attr.attr, + &sensor_dev_attr_temp1_min.dev_attr.attr, + &sensor_dev_attr_temp2_min.dev_attr.attr, + &sensor_dev_attr_temp3_min.dev_attr.attr, + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp3_input.dev_attr.attr, + &sensor_dev_attr_temp1_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr, + &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr, + &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr, + &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr, + &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr, + &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr, + + &sensor_dev_attr_fan1_min.dev_attr.attr, + &sensor_dev_attr_fan2_min.dev_attr.attr, + &sensor_dev_attr_fan3_min.dev_attr.attr, + &sensor_dev_attr_fan4_min.dev_attr.attr, + &sensor_dev_attr_fan1_input.dev_attr.attr, + &sensor_dev_attr_fan2_input.dev_attr.attr, + &sensor_dev_attr_fan3_input.dev_attr.attr, + &sensor_dev_attr_fan4_input.dev_attr.attr, + &sensor_dev_attr_fan1_alarm.dev_attr.attr, + &sensor_dev_attr_fan2_alarm.dev_attr.attr, + &sensor_dev_attr_fan3_alarm.dev_attr.attr, + &sensor_dev_attr_fan4_alarm.dev_attr.attr, + + &sensor_dev_attr_pwm_use_point2_pwm_at_crit.dev_attr.attr, + + &sensor_dev_attr_pwm1.dev_attr.attr, + &sensor_dev_attr_pwm2.dev_attr.attr, + &sensor_dev_attr_pwm3.dev_attr.attr, + &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, + &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, + &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, + &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, + &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, + &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, + + &sensor_dev_attr_pwm1_enable.dev_attr.attr, + &sensor_dev_attr_pwm2_enable.dev_attr.attr, + &sensor_dev_attr_pwm3_enable.dev_attr.attr, + &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, + &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr, + &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, + + NULL +}; + +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int adt7473_detect(struct i2c_client *client, int kind, + struct i2c_board_info *info) +{ + struct i2c_adapter *adapter = client->adapter; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + if (kind <= 0) { + int vendor, device, revision; + + vendor = i2c_smbus_read_byte_data(client, ADT7473_REG_VENDOR); + if (vendor != ADT7473_VENDOR) + return -ENODEV; + + device = i2c_smbus_read_byte_data(client, ADT7473_REG_DEVICE); + if (device != ADT7473_DEVICE) + return -ENODEV; + + revision = i2c_smbus_read_byte_data(client, + ADT7473_REG_REVISION); + if (revision != ADT7473_REV_68 && revision != ADT7473_REV_69) + return -ENODEV; + } else + dev_dbg(&adapter->dev, "detection forced\n"); + + strlcpy(info->type, "adt7473", I2C_NAME_SIZE); + + return 0; +} + +static int adt7473_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct adt7473_data *data; + int err; + + data = kzalloc(sizeof(struct adt7473_data), GFP_KERNEL); + if (!data) { + err = -ENOMEM; + goto exit; + } + + i2c_set_clientdata(client, data); + mutex_init(&data->lock); + + dev_info(&client->dev, "%s chip found\n", client->name); + + /* Initialize the ADT7473 chip */ + adt7473_init_client(client); + + /* Register sysfs hooks */ + data->attrs.attrs = adt7473_attr; + err = sysfs_create_group(&client->dev.kobj, &data->attrs); + if (err) + goto exit_free; + + data->hwmon_dev = hwmon_device_register(&client->dev); + if (IS_ERR(data->hwmon_dev)) { + err = PTR_ERR(data->hwmon_dev); + goto exit_remove; + } + + return 0; + +exit_remove: + sysfs_remove_group(&client->dev.kobj, &data->attrs); +exit_free: + kfree(data); +exit: + return err; +} + +static int adt7473_remove(struct i2c_client *client) +{ + struct adt7473_data *data = i2c_get_clientdata(client); + + hwmon_device_unregister(data->hwmon_dev); + sysfs_remove_group(&client->dev.kobj, &data->attrs); + kfree(data); + return 0; +} + +static int __init adt7473_init(void) +{ + return i2c_add_driver(&adt7473_driver); +} + +static void __exit adt7473_exit(void) +{ + i2c_del_driver(&adt7473_driver); +} + +MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>"); +MODULE_DESCRIPTION("ADT7473 driver"); +MODULE_LICENSE("GPL"); + +module_init(adt7473_init); +module_exit(adt7473_exit); |
