| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Thilo Cestonaro | 2161 | 74.47% | 2 | 14.29% |
| Armin Wolf | 731 | 25.19% | 5 | 35.71% |
| Guenter Roeck | 3 | 0.10% | 1 | 7.14% |
| Thomas Gleixner | 2 | 0.07% | 1 | 7.14% |
| Arvind Yadav | 1 | 0.03% | 1 | 7.14% |
| Wolfram Sang | 1 | 0.03% | 1 | 7.14% |
| Uwe Kleine-König | 1 | 0.03% | 1 | 7.14% |
| Krzysztof Kozlowski | 1 | 0.03% | 1 | 7.14% |
| zuoqilin | 1 | 0.03% | 1 | 7.14% |
| Total | 2902 | 14 |
// 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/hwmon.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/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 #define FTS_FAN_SOURCE_INVALID 0xff 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] = FTS_FAN_SOURCE_INVALID; } } 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 devm_watchdog_register_device(&data->client->dev, &data->wdd); } static umode_t fts_is_visible(const void *devdata, enum hwmon_sensor_types type, u32 attr, int channel) { switch (type) { case hwmon_temp: switch (attr) { case hwmon_temp_input: case hwmon_temp_fault: return 0444; case hwmon_temp_alarm: return 0644; default: break; } break; case hwmon_fan: switch (attr) { case hwmon_fan_input: case hwmon_fan_fault: return 0444; case hwmon_fan_alarm: return 0644; default: break; } break; case hwmon_pwm: case hwmon_in: return 0444; default: break; } return 0; } static int fts_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { struct fts_data *data = dev_get_drvdata(dev); int ret = fts_update_device(data); if (ret < 0) return ret; switch (type) { case hwmon_temp: switch (attr) { case hwmon_temp_input: *val = (data->temp_input[channel] - 64) * 1000; return 0; case hwmon_temp_alarm: *val = !!(data->temp_alarm & BIT(channel)); return 0; case hwmon_temp_fault: /* 00h Temperature = Sensor Error */; *val = (data->temp_input[channel] == 0); return 0; default: break; } break; case hwmon_fan: switch (attr) { case hwmon_fan_input: *val = data->fan_input[channel] * 60; return 0; case hwmon_fan_alarm: *val = !!(data->fan_alarm & BIT(channel)); return 0; case hwmon_fan_fault: *val = !(data->fan_present & BIT(channel)); return 0; default: break; } break; case hwmon_pwm: switch (attr) { case hwmon_pwm_auto_channels_temp: if (data->fan_source[channel] == FTS_FAN_SOURCE_INVALID) *val = 0; else *val = BIT(data->fan_source[channel]); return 0; default: break; } break; case hwmon_in: switch (attr) { case hwmon_in_input: *val = DIV_ROUND_CLOSEST(data->volt[channel] * 3300, 255); return 0; default: break; } break; default: break; } return -EOPNOTSUPP; } static int fts_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { struct fts_data *data = dev_get_drvdata(dev); int ret = fts_update_device(data); if (ret < 0) return ret; switch (type) { case hwmon_temp: switch (attr) { case hwmon_temp_alarm: if (val) return -EINVAL; mutex_lock(&data->update_lock); ret = fts_read_byte(data->client, FTS_REG_TEMP_CONTROL(channel)); if (ret >= 0) ret = fts_write_byte(data->client, FTS_REG_TEMP_CONTROL(channel), ret | 0x1); if (ret >= 0) data->valid = false; mutex_unlock(&data->update_lock); if (ret < 0) return ret; return 0; default: break; } break; case hwmon_fan: switch (attr) { case hwmon_fan_alarm: if (val) return -EINVAL; mutex_lock(&data->update_lock); ret = fts_read_byte(data->client, FTS_REG_FAN_CONTROL(channel)); if (ret >= 0) ret = fts_write_byte(data->client, FTS_REG_FAN_CONTROL(channel), ret | 0x1); if (ret >= 0) data->valid = false; mutex_unlock(&data->update_lock); if (ret < 0) return ret; return 0; default: break; } break; default: break; } return -EOPNOTSUPP; } static const struct hwmon_ops fts_ops = { .is_visible = fts_is_visible, .read = fts_read, .write = fts_write, }; static const struct hwmon_channel_info * const fts_info[] = { HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ), HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_FAULT ), HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT | HWMON_F_ALARM | HWMON_F_FAULT, HWMON_F_INPUT | HWMON_F_ALARM | HWMON_F_FAULT, HWMON_F_INPUT | HWMON_F_ALARM | HWMON_F_FAULT, HWMON_F_INPUT | HWMON_F_ALARM | HWMON_F_FAULT, HWMON_F_INPUT | HWMON_F_ALARM | HWMON_F_FAULT, HWMON_F_INPUT | HWMON_F_ALARM | HWMON_F_FAULT, HWMON_F_INPUT | HWMON_F_ALARM | HWMON_F_FAULT, HWMON_F_INPUT | HWMON_F_ALARM | HWMON_F_FAULT ), HWMON_CHANNEL_INFO(pwm, HWMON_PWM_AUTO_CHANNELS_TEMP, HWMON_PWM_AUTO_CHANNELS_TEMP, HWMON_PWM_AUTO_CHANNELS_TEMP, HWMON_PWM_AUTO_CHANNELS_TEMP, HWMON_PWM_AUTO_CHANNELS_TEMP, HWMON_PWM_AUTO_CHANNELS_TEMP, HWMON_PWM_AUTO_CHANNELS_TEMP, HWMON_PWM_AUTO_CHANNELS_TEMP ), HWMON_CHANNEL_INFO(in, HWMON_I_INPUT, HWMON_I_INPUT, HWMON_I_INPUT, HWMON_I_INPUT ), NULL }; static const struct hwmon_chip_info fts_chip_info = { .ops = &fts_ops, .info = fts_info, }; /*****************************************************************************/ /* 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 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_info(&client->dev, "ftsteutates", data, &fts_chip_info, NULL); 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 = fts_probe, .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");
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