diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/hwmon/ftsteutates.c | 838 |
1 files changed, 838 insertions, 0 deletions
diff --git a/drivers/hwmon/ftsteutates.c b/drivers/hwmon/ftsteutates.c new file mode 100644 index 000000000..ffa0bb364 --- /dev/null +++ b/drivers/hwmon/ftsteutates.c @@ -0,0 +1,838 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Support for the FTS Systemmonitoring Chip "Teutates" + * + * Copyright (C) 2016 Fujitsu Technology Solutions GmbH, + * Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com> + */ +#include <linux/err.h> +#include <linux/fs.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/jiffies.h> +#include <linux/math.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/uaccess.h> +#include <linux/watchdog.h> + +#define FTS_DEVICE_ID_REG 0x0000 +#define FTS_DEVICE_REVISION_REG 0x0001 +#define FTS_DEVICE_STATUS_REG 0x0004 +#define FTS_SATELLITE_STATUS_REG 0x0005 +#define FTS_EVENT_STATUS_REG 0x0006 +#define FTS_GLOBAL_CONTROL_REG 0x0007 + +#define FTS_DEVICE_DETECT_REG_1 0x0C +#define FTS_DEVICE_DETECT_REG_2 0x0D +#define FTS_DEVICE_DETECT_REG_3 0x0E + +#define FTS_SENSOR_EVENT_REG 0x0010 + +#define FTS_FAN_EVENT_REG 0x0014 +#define FTS_FAN_PRESENT_REG 0x0015 + +#define FTS_POWER_ON_TIME_COUNTER_A 0x007A +#define FTS_POWER_ON_TIME_COUNTER_B 0x007B +#define FTS_POWER_ON_TIME_COUNTER_C 0x007C + +#define FTS_PAGE_SELECT_REG 0x007F + +#define FTS_WATCHDOG_TIME_PRESET 0x000B +#define FTS_WATCHDOG_CONTROL 0x5081 + +#define FTS_NO_FAN_SENSORS 0x08 +#define FTS_NO_TEMP_SENSORS 0x10 +#define FTS_NO_VOLT_SENSORS 0x04 + +static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END }; + +static const struct i2c_device_id fts_id[] = { + { "ftsteutates", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, fts_id); + +enum WATCHDOG_RESOLUTION { + seconds = 1, + minutes = 60 +}; + +struct fts_data { + struct i2c_client *client; + /* update sensor data lock */ + struct mutex update_lock; + /* read/write register lock */ + struct mutex access_lock; + unsigned long last_updated; /* in jiffies */ + struct watchdog_device wdd; + enum WATCHDOG_RESOLUTION resolution; + bool valid; /* false until following fields are valid */ + + u8 volt[FTS_NO_VOLT_SENSORS]; + + u8 temp_input[FTS_NO_TEMP_SENSORS]; + u8 temp_alarm; + + u8 fan_present; + u8 fan_input[FTS_NO_FAN_SENSORS]; /* in rps */ + u8 fan_source[FTS_NO_FAN_SENSORS]; + u8 fan_alarm; +}; + +#define FTS_REG_FAN_INPUT(idx) ((idx) + 0x20) +#define FTS_REG_FAN_SOURCE(idx) ((idx) + 0x30) +#define FTS_REG_FAN_CONTROL(idx) (((idx) << 16) + 0x4881) + +#define FTS_REG_TEMP_INPUT(idx) ((idx) + 0x40) +#define FTS_REG_TEMP_CONTROL(idx) (((idx) << 16) + 0x0681) + +#define FTS_REG_VOLT(idx) ((idx) + 0x18) + +/*****************************************************************************/ +/* I2C Helper functions */ +/*****************************************************************************/ +static int fts_read_byte(struct i2c_client *client, unsigned short reg) +{ + int ret; + unsigned char page = reg >> 8; + struct fts_data *data = dev_get_drvdata(&client->dev); + + mutex_lock(&data->access_lock); + + dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page); + ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page); + if (ret < 0) + goto error; + + reg &= 0xFF; + ret = i2c_smbus_read_byte_data(client, reg); + dev_dbg(&client->dev, "read - reg: 0x%.02x: val: 0x%.02x\n", reg, ret); + +error: + mutex_unlock(&data->access_lock); + return ret; +} + +static int fts_write_byte(struct i2c_client *client, unsigned short reg, + unsigned char value) +{ + int ret; + unsigned char page = reg >> 8; + struct fts_data *data = dev_get_drvdata(&client->dev); + + mutex_lock(&data->access_lock); + + dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page); + ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page); + if (ret < 0) + goto error; + + reg &= 0xFF; + dev_dbg(&client->dev, + "write - reg: 0x%.02x: val: 0x%.02x\n", reg, value); + ret = i2c_smbus_write_byte_data(client, reg, value); + +error: + mutex_unlock(&data->access_lock); + return ret; +} + +/*****************************************************************************/ +/* Data Updater Helper function */ +/*****************************************************************************/ +static int fts_update_device(struct fts_data *data) +{ + int i; + int err = 0; + + mutex_lock(&data->update_lock); + if (!time_after(jiffies, data->last_updated + 2 * HZ) && data->valid) + goto exit; + + err = fts_read_byte(data->client, FTS_DEVICE_STATUS_REG); + if (err < 0) + goto exit; + + data->valid = !!(err & 0x02); /* Data not ready yet */ + if (unlikely(!data->valid)) { + err = -EAGAIN; + goto exit; + } + + err = fts_read_byte(data->client, FTS_FAN_PRESENT_REG); + if (err < 0) + goto exit; + data->fan_present = err; + + err = fts_read_byte(data->client, FTS_FAN_EVENT_REG); + if (err < 0) + goto exit; + data->fan_alarm = err; + + for (i = 0; i < FTS_NO_FAN_SENSORS; i++) { + if (data->fan_present & BIT(i)) { + err = fts_read_byte(data->client, FTS_REG_FAN_INPUT(i)); + if (err < 0) + goto exit; + data->fan_input[i] = err; + + err = fts_read_byte(data->client, + FTS_REG_FAN_SOURCE(i)); + if (err < 0) + goto exit; + data->fan_source[i] = err; + } else { + data->fan_input[i] = 0; + data->fan_source[i] = 0; + } + } + + err = fts_read_byte(data->client, FTS_SENSOR_EVENT_REG); + if (err < 0) + goto exit; + data->temp_alarm = err; + + for (i = 0; i < FTS_NO_TEMP_SENSORS; i++) { + err = fts_read_byte(data->client, FTS_REG_TEMP_INPUT(i)); + if (err < 0) + goto exit; + data->temp_input[i] = err; + } + + for (i = 0; i < FTS_NO_VOLT_SENSORS; i++) { + err = fts_read_byte(data->client, FTS_REG_VOLT(i)); + if (err < 0) + goto exit; + data->volt[i] = err; + } + data->last_updated = jiffies; + err = 0; +exit: + mutex_unlock(&data->update_lock); + return err; +} + +/*****************************************************************************/ +/* Watchdog functions */ +/*****************************************************************************/ +static int fts_wd_set_resolution(struct fts_data *data, + enum WATCHDOG_RESOLUTION resolution) +{ + int ret; + + if (data->resolution == resolution) + return 0; + + ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL); + if (ret < 0) + return ret; + + if ((resolution == seconds && ret & BIT(1)) || + (resolution == minutes && (ret & BIT(1)) == 0)) { + data->resolution = resolution; + return 0; + } + + if (resolution == seconds) + ret |= BIT(1); + else + ret &= ~BIT(1); + + ret = fts_write_byte(data->client, FTS_WATCHDOG_CONTROL, ret); + if (ret < 0) + return ret; + + data->resolution = resolution; + return ret; +} + +static int fts_wd_set_timeout(struct watchdog_device *wdd, unsigned int timeout) +{ + struct fts_data *data; + enum WATCHDOG_RESOLUTION resolution = seconds; + int ret; + + data = watchdog_get_drvdata(wdd); + /* switch watchdog resolution to minutes if timeout does not fit + * into a byte + */ + if (timeout > 0xFF) { + timeout = DIV_ROUND_UP(timeout, 60) * 60; + resolution = minutes; + } + + ret = fts_wd_set_resolution(data, resolution); + if (ret < 0) + return ret; + + wdd->timeout = timeout; + return 0; +} + +static int fts_wd_start(struct watchdog_device *wdd) +{ + struct fts_data *data = watchdog_get_drvdata(wdd); + + return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET, + wdd->timeout / (u8)data->resolution); +} + +static int fts_wd_stop(struct watchdog_device *wdd) +{ + struct fts_data *data; + + data = watchdog_get_drvdata(wdd); + return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET, 0); +} + +static const struct watchdog_info fts_wd_info = { + .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, + .identity = "FTS Teutates Hardware Watchdog", +}; + +static const struct watchdog_ops fts_wd_ops = { + .owner = THIS_MODULE, + .start = fts_wd_start, + .stop = fts_wd_stop, + .set_timeout = fts_wd_set_timeout, +}; + +static int fts_watchdog_init(struct fts_data *data) +{ + int timeout, ret; + + watchdog_set_drvdata(&data->wdd, data); + + timeout = fts_read_byte(data->client, FTS_WATCHDOG_TIME_PRESET); + if (timeout < 0) + return timeout; + + /* watchdog not running, set timeout to a default of 60 sec. */ + if (timeout == 0) { + ret = fts_wd_set_resolution(data, seconds); + if (ret < 0) + return ret; + data->wdd.timeout = 60; + } else { + ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL); + if (ret < 0) + return ret; + + data->resolution = ret & BIT(1) ? seconds : minutes; + data->wdd.timeout = timeout * (u8)data->resolution; + set_bit(WDOG_HW_RUNNING, &data->wdd.status); + } + + /* Register our watchdog part */ + data->wdd.info = &fts_wd_info; + data->wdd.ops = &fts_wd_ops; + data->wdd.parent = &data->client->dev; + data->wdd.min_timeout = 1; + + /* max timeout 255 minutes. */ + data->wdd.max_hw_heartbeat_ms = 0xFF * 60 * MSEC_PER_SEC; + + return watchdog_register_device(&data->wdd); +} + +/*****************************************************************************/ +/* SysFS handler functions */ +/*****************************************************************************/ +static ssize_t in_value_show(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct fts_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(devattr)->index; + int value, err; + + err = fts_update_device(data); + if (err < 0) + return err; + + value = DIV_ROUND_CLOSEST(data->volt[index] * 3300, 255); + + return sprintf(buf, "%d\n", value); +} + +static ssize_t temp_value_show(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct fts_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(devattr)->index; + int value, err; + + err = fts_update_device(data); + if (err < 0) + return err; + + value = (data->temp_input[index] - 64) * 1000; + + return sprintf(buf, "%d\n", value); +} + +static ssize_t temp_fault_show(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct fts_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(devattr)->index; + int err; + + err = fts_update_device(data); + if (err < 0) + return err; + + /* 00h Temperature = Sensor Error */ + return sprintf(buf, "%d\n", data->temp_input[index] == 0); +} + +static ssize_t temp_alarm_show(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct fts_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(devattr)->index; + int err; + + err = fts_update_device(data); + if (err < 0) + return err; + + return sprintf(buf, "%u\n", !!(data->temp_alarm & BIT(index))); +} + +static ssize_t +temp_alarm_store(struct device *dev, struct device_attribute *devattr, + const char *buf, size_t count) +{ + struct fts_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(devattr)->index; + long ret; + + ret = fts_update_device(data); + if (ret < 0) + return ret; + + if (kstrtoul(buf, 10, &ret) || ret != 0) + return -EINVAL; + + mutex_lock(&data->update_lock); + ret = fts_read_byte(data->client, FTS_REG_TEMP_CONTROL(index)); + if (ret < 0) + goto error; + + ret = fts_write_byte(data->client, FTS_REG_TEMP_CONTROL(index), + ret | 0x1); + if (ret < 0) + goto error; + + data->valid = false; + ret = count; +error: + mutex_unlock(&data->update_lock); + return ret; +} + +static ssize_t fan_value_show(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct fts_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(devattr)->index; + int value, err; + + err = fts_update_device(data); + if (err < 0) + return err; + + value = data->fan_input[index] * 60; + + return sprintf(buf, "%d\n", value); +} + +static ssize_t fan_source_show(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct fts_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(devattr)->index; + int err; + + err = fts_update_device(data); + if (err < 0) + return err; + + return sprintf(buf, "%u\n", data->fan_source[index]); +} + +static ssize_t fan_alarm_show(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct fts_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(devattr)->index; + int err; + + err = fts_update_device(data); + if (err < 0) + return err; + + return sprintf(buf, "%d\n", !!(data->fan_alarm & BIT(index))); +} + +static ssize_t +fan_alarm_store(struct device *dev, struct device_attribute *devattr, + const char *buf, size_t count) +{ + struct fts_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(devattr)->index; + long ret; + + ret = fts_update_device(data); + if (ret < 0) + return ret; + + if (kstrtoul(buf, 10, &ret) || ret != 0) + return -EINVAL; + + mutex_lock(&data->update_lock); + ret = fts_read_byte(data->client, FTS_REG_FAN_CONTROL(index)); + if (ret < 0) + goto error; + + ret = fts_write_byte(data->client, FTS_REG_FAN_CONTROL(index), + ret | 0x1); + if (ret < 0) + goto error; + + data->valid = false; + ret = count; +error: + mutex_unlock(&data->update_lock); + return ret; +} + +/*****************************************************************************/ +/* SysFS structs */ +/*****************************************************************************/ + +/* Temperature sensors */ +static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_value, 0); +static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_value, 1); +static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_value, 2); +static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_value, 3); +static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_value, 4); +static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_value, 5); +static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_value, 6); +static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_value, 7); +static SENSOR_DEVICE_ATTR_RO(temp9_input, temp_value, 8); +static SENSOR_DEVICE_ATTR_RO(temp10_input, temp_value, 9); +static SENSOR_DEVICE_ATTR_RO(temp11_input, temp_value, 10); +static SENSOR_DEVICE_ATTR_RO(temp12_input, temp_value, 11); +static SENSOR_DEVICE_ATTR_RO(temp13_input, temp_value, 12); +static SENSOR_DEVICE_ATTR_RO(temp14_input, temp_value, 13); +static SENSOR_DEVICE_ATTR_RO(temp15_input, temp_value, 14); +static SENSOR_DEVICE_ATTR_RO(temp16_input, temp_value, 15); + +static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0); +static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1); +static SENSOR_DEVICE_ATTR_RO(temp3_fault, temp_fault, 2); +static SENSOR_DEVICE_ATTR_RO(temp4_fault, temp_fault, 3); +static SENSOR_DEVICE_ATTR_RO(temp5_fault, temp_fault, 4); +static SENSOR_DEVICE_ATTR_RO(temp6_fault, temp_fault, 5); +static SENSOR_DEVICE_ATTR_RO(temp7_fault, temp_fault, 6); +static SENSOR_DEVICE_ATTR_RO(temp8_fault, temp_fault, 7); +static SENSOR_DEVICE_ATTR_RO(temp9_fault, temp_fault, 8); +static SENSOR_DEVICE_ATTR_RO(temp10_fault, temp_fault, 9); +static SENSOR_DEVICE_ATTR_RO(temp11_fault, temp_fault, 10); +static SENSOR_DEVICE_ATTR_RO(temp12_fault, temp_fault, 11); +static SENSOR_DEVICE_ATTR_RO(temp13_fault, temp_fault, 12); +static SENSOR_DEVICE_ATTR_RO(temp14_fault, temp_fault, 13); +static SENSOR_DEVICE_ATTR_RO(temp15_fault, temp_fault, 14); +static SENSOR_DEVICE_ATTR_RO(temp16_fault, temp_fault, 15); + +static SENSOR_DEVICE_ATTR_RW(temp1_alarm, temp_alarm, 0); +static SENSOR_DEVICE_ATTR_RW(temp2_alarm, temp_alarm, 1); +static SENSOR_DEVICE_ATTR_RW(temp3_alarm, temp_alarm, 2); +static SENSOR_DEVICE_ATTR_RW(temp4_alarm, temp_alarm, 3); +static SENSOR_DEVICE_ATTR_RW(temp5_alarm, temp_alarm, 4); +static SENSOR_DEVICE_ATTR_RW(temp6_alarm, temp_alarm, 5); +static SENSOR_DEVICE_ATTR_RW(temp7_alarm, temp_alarm, 6); +static SENSOR_DEVICE_ATTR_RW(temp8_alarm, temp_alarm, 7); +static SENSOR_DEVICE_ATTR_RW(temp9_alarm, temp_alarm, 8); +static SENSOR_DEVICE_ATTR_RW(temp10_alarm, temp_alarm, 9); +static SENSOR_DEVICE_ATTR_RW(temp11_alarm, temp_alarm, 10); +static SENSOR_DEVICE_ATTR_RW(temp12_alarm, temp_alarm, 11); +static SENSOR_DEVICE_ATTR_RW(temp13_alarm, temp_alarm, 12); +static SENSOR_DEVICE_ATTR_RW(temp14_alarm, temp_alarm, 13); +static SENSOR_DEVICE_ATTR_RW(temp15_alarm, temp_alarm, 14); +static SENSOR_DEVICE_ATTR_RW(temp16_alarm, temp_alarm, 15); + +static struct attribute *fts_temp_attrs[] = { + &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_temp4_input.dev_attr.attr, + &sensor_dev_attr_temp5_input.dev_attr.attr, + &sensor_dev_attr_temp6_input.dev_attr.attr, + &sensor_dev_attr_temp7_input.dev_attr.attr, + &sensor_dev_attr_temp8_input.dev_attr.attr, + &sensor_dev_attr_temp9_input.dev_attr.attr, + &sensor_dev_attr_temp10_input.dev_attr.attr, + &sensor_dev_attr_temp11_input.dev_attr.attr, + &sensor_dev_attr_temp12_input.dev_attr.attr, + &sensor_dev_attr_temp13_input.dev_attr.attr, + &sensor_dev_attr_temp14_input.dev_attr.attr, + &sensor_dev_attr_temp15_input.dev_attr.attr, + &sensor_dev_attr_temp16_input.dev_attr.attr, + + &sensor_dev_attr_temp1_fault.dev_attr.attr, + &sensor_dev_attr_temp2_fault.dev_attr.attr, + &sensor_dev_attr_temp3_fault.dev_attr.attr, + &sensor_dev_attr_temp4_fault.dev_attr.attr, + &sensor_dev_attr_temp5_fault.dev_attr.attr, + &sensor_dev_attr_temp6_fault.dev_attr.attr, + &sensor_dev_attr_temp7_fault.dev_attr.attr, + &sensor_dev_attr_temp8_fault.dev_attr.attr, + &sensor_dev_attr_temp9_fault.dev_attr.attr, + &sensor_dev_attr_temp10_fault.dev_attr.attr, + &sensor_dev_attr_temp11_fault.dev_attr.attr, + &sensor_dev_attr_temp12_fault.dev_attr.attr, + &sensor_dev_attr_temp13_fault.dev_attr.attr, + &sensor_dev_attr_temp14_fault.dev_attr.attr, + &sensor_dev_attr_temp15_fault.dev_attr.attr, + &sensor_dev_attr_temp16_fault.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_temp4_alarm.dev_attr.attr, + &sensor_dev_attr_temp5_alarm.dev_attr.attr, + &sensor_dev_attr_temp6_alarm.dev_attr.attr, + &sensor_dev_attr_temp7_alarm.dev_attr.attr, + &sensor_dev_attr_temp8_alarm.dev_attr.attr, + &sensor_dev_attr_temp9_alarm.dev_attr.attr, + &sensor_dev_attr_temp10_alarm.dev_attr.attr, + &sensor_dev_attr_temp11_alarm.dev_attr.attr, + &sensor_dev_attr_temp12_alarm.dev_attr.attr, + &sensor_dev_attr_temp13_alarm.dev_attr.attr, + &sensor_dev_attr_temp14_alarm.dev_attr.attr, + &sensor_dev_attr_temp15_alarm.dev_attr.attr, + &sensor_dev_attr_temp16_alarm.dev_attr.attr, + NULL +}; + +/* Fans */ +static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_value, 0); +static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_value, 1); +static SENSOR_DEVICE_ATTR_RO(fan3_input, fan_value, 2); +static SENSOR_DEVICE_ATTR_RO(fan4_input, fan_value, 3); +static SENSOR_DEVICE_ATTR_RO(fan5_input, fan_value, 4); +static SENSOR_DEVICE_ATTR_RO(fan6_input, fan_value, 5); +static SENSOR_DEVICE_ATTR_RO(fan7_input, fan_value, 6); +static SENSOR_DEVICE_ATTR_RO(fan8_input, fan_value, 7); + +static SENSOR_DEVICE_ATTR_RO(fan1_source, fan_source, 0); +static SENSOR_DEVICE_ATTR_RO(fan2_source, fan_source, 1); +static SENSOR_DEVICE_ATTR_RO(fan3_source, fan_source, 2); +static SENSOR_DEVICE_ATTR_RO(fan4_source, fan_source, 3); +static SENSOR_DEVICE_ATTR_RO(fan5_source, fan_source, 4); +static SENSOR_DEVICE_ATTR_RO(fan6_source, fan_source, 5); +static SENSOR_DEVICE_ATTR_RO(fan7_source, fan_source, 6); +static SENSOR_DEVICE_ATTR_RO(fan8_source, fan_source, 7); + +static SENSOR_DEVICE_ATTR_RW(fan1_alarm, fan_alarm, 0); +static SENSOR_DEVICE_ATTR_RW(fan2_alarm, fan_alarm, 1); +static SENSOR_DEVICE_ATTR_RW(fan3_alarm, fan_alarm, 2); +static SENSOR_DEVICE_ATTR_RW(fan4_alarm, fan_alarm, 3); +static SENSOR_DEVICE_ATTR_RW(fan5_alarm, fan_alarm, 4); +static SENSOR_DEVICE_ATTR_RW(fan6_alarm, fan_alarm, 5); +static SENSOR_DEVICE_ATTR_RW(fan7_alarm, fan_alarm, 6); +static SENSOR_DEVICE_ATTR_RW(fan8_alarm, fan_alarm, 7); + +static struct attribute *fts_fan_attrs[] = { + &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_fan5_input.dev_attr.attr, + &sensor_dev_attr_fan6_input.dev_attr.attr, + &sensor_dev_attr_fan7_input.dev_attr.attr, + &sensor_dev_attr_fan8_input.dev_attr.attr, + + &sensor_dev_attr_fan1_source.dev_attr.attr, + &sensor_dev_attr_fan2_source.dev_attr.attr, + &sensor_dev_attr_fan3_source.dev_attr.attr, + &sensor_dev_attr_fan4_source.dev_attr.attr, + &sensor_dev_attr_fan5_source.dev_attr.attr, + &sensor_dev_attr_fan6_source.dev_attr.attr, + &sensor_dev_attr_fan7_source.dev_attr.attr, + &sensor_dev_attr_fan8_source.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_fan5_alarm.dev_attr.attr, + &sensor_dev_attr_fan6_alarm.dev_attr.attr, + &sensor_dev_attr_fan7_alarm.dev_attr.attr, + &sensor_dev_attr_fan8_alarm.dev_attr.attr, + NULL +}; + +/* Voltages */ +static SENSOR_DEVICE_ATTR_RO(in1_input, in_value, 0); +static SENSOR_DEVICE_ATTR_RO(in2_input, in_value, 1); +static SENSOR_DEVICE_ATTR_RO(in3_input, in_value, 2); +static SENSOR_DEVICE_ATTR_RO(in4_input, in_value, 3); +static struct attribute *fts_voltage_attrs[] = { + &sensor_dev_attr_in1_input.dev_attr.attr, + &sensor_dev_attr_in2_input.dev_attr.attr, + &sensor_dev_attr_in3_input.dev_attr.attr, + &sensor_dev_attr_in4_input.dev_attr.attr, + NULL +}; + +static const struct attribute_group fts_voltage_attr_group = { + .attrs = fts_voltage_attrs +}; + +static const struct attribute_group fts_temp_attr_group = { + .attrs = fts_temp_attrs +}; + +static const struct attribute_group fts_fan_attr_group = { + .attrs = fts_fan_attrs +}; + +static const struct attribute_group *fts_attr_groups[] = { + &fts_voltage_attr_group, + &fts_temp_attr_group, + &fts_fan_attr_group, + NULL +}; + +/*****************************************************************************/ +/* Module initialization / remove functions */ +/*****************************************************************************/ +static int fts_detect(struct i2c_client *client, + struct i2c_board_info *info) +{ + int val; + + /* detection works with revision greater or equal to 0x2b */ + val = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG); + if (val < 0x2b) + return -ENODEV; + + /* Device Detect Regs must have 0x17 0x34 and 0x54 */ + val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_1); + if (val != 0x17) + return -ENODEV; + + val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_2); + if (val != 0x34) + return -ENODEV; + + val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_3); + if (val != 0x54) + return -ENODEV; + + /* + * 0x10 == Baseboard Management Controller, 0x01 == Teutates + * Device ID Reg needs to be 0x11 + */ + val = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG); + if (val != 0x11) + return -ENODEV; + + strscpy(info->type, fts_id[0].name, I2C_NAME_SIZE); + info->flags = 0; + return 0; +} + +static void fts_remove(struct i2c_client *client) +{ + struct fts_data *data = dev_get_drvdata(&client->dev); + + watchdog_unregister_device(&data->wdd); +} + +static int fts_probe(struct i2c_client *client) +{ + u8 revision; + struct fts_data *data; + int err; + s8 deviceid; + struct device *hwmon_dev; + + if (client->addr != 0x73) + return -ENODEV; + + /* Baseboard Management Controller check */ + deviceid = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG); + if (deviceid > 0 && (deviceid & 0xF0) == 0x10) { + switch (deviceid & 0x0F) { + case 0x01: + break; + default: + dev_dbg(&client->dev, + "No Baseboard Management Controller\n"); + return -ENODEV; + } + } else { + dev_dbg(&client->dev, "No fujitsu board\n"); + return -ENODEV; + } + + data = devm_kzalloc(&client->dev, sizeof(struct fts_data), + GFP_KERNEL); + if (!data) + return -ENOMEM; + + mutex_init(&data->update_lock); + mutex_init(&data->access_lock); + data->client = client; + dev_set_drvdata(&client->dev, data); + + err = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG); + if (err < 0) + return err; + revision = err; + + hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev, + "ftsteutates", + data, + fts_attr_groups); + if (IS_ERR(hwmon_dev)) + return PTR_ERR(hwmon_dev); + + err = fts_watchdog_init(data); + if (err) + return err; + + dev_info(&client->dev, "Detected FTS Teutates chip, revision: %d.%d\n", + (revision & 0xF0) >> 4, revision & 0x0F); + return 0; +} + +/*****************************************************************************/ +/* Module Details */ +/*****************************************************************************/ +static struct i2c_driver fts_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "ftsteutates", + }, + .id_table = fts_id, + .probe_new = fts_probe, + .remove = fts_remove, + .detect = fts_detect, + .address_list = normal_i2c, +}; + +module_i2c_driver(fts_driver); + +MODULE_AUTHOR("Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>"); +MODULE_DESCRIPTION("FTS Teutates driver"); +MODULE_LICENSE("GPL"); |