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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 err; err = fts_update_device(data); if (err < 0) return err; return sprintf(buf, "%u\n", data->volt[index]); } 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 err; err = fts_update_device(data); if (err < 0) return err; return sprintf(buf, "%u\n", data->temp_input[index]); } 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 err; err = fts_update_device(data); if (err < 0) return err; return sprintf(buf, "%u\n", data->fan_input[index]); } 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 */ /*****************************************************************************/ /* Temprature 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 revsion 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; strlcpy(info->type, fts_id[0].name, I2C_NAME_SIZE); info->flags = 0; return 0; } static int fts_remove(struct i2c_client *client) { struct fts_data *data = dev_get_drvdata(&client->dev); watchdog_unregister_device(&data->wdd); return 0; } 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"); |