drivers/hwmon/ftsteutates.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Support for the FTS Systemmonitoring Chip "Teutates"
   4  *
   5  * Copyright (C) 2016 Fujitsu Technology Solutions GmbH,
   6  *                Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>
   7  */
   8 #include <linux/err.h>
   9 #include <linux/fs.h>
  10 #include <linux/hwmon.h>
  11 #include <linux/hwmon-sysfs.h>
  12 #include <linux/i2c.h>
  13 #include <linux/init.h>
  14 #include <linux/jiffies.h>
  15 #include <linux/module.h>
  16 #include <linux/mutex.h>
  17 #include <linux/slab.h>
  18 #include <linux/sysfs.h>
  19 #include <linux/uaccess.h>
  20 #include <linux/watchdog.h>
  21
  22 #define FTS_DEVICE_ID_REG               0x0000
  23 #define FTS_DEVICE_REVISION_REG         0x0001
  24 #define FTS_DEVICE_STATUS_REG           0x0004
  25 #define FTS_SATELLITE_STATUS_REG        0x0005
  26 #define FTS_EVENT_STATUS_REG            0x0006
  27 #define FTS_GLOBAL_CONTROL_REG          0x0007
  28
  29 #define FTS_DEVICE_DETECT_REG_1         0x0C
  30 #define FTS_DEVICE_DETECT_REG_2         0x0D
  31 #define FTS_DEVICE_DETECT_REG_3         0x0E
  32
  33 #define FTS_SENSOR_EVENT_REG            0x0010
  34
  35 #define FTS_FAN_EVENT_REG               0x0014
  36 #define FTS_FAN_PRESENT_REG             0x0015
  37
  38 #define FTS_POWER_ON_TIME_COUNTER_A     0x007A
  39 #define FTS_POWER_ON_TIME_COUNTER_B     0x007B
  40 #define FTS_POWER_ON_TIME_COUNTER_C     0x007C
  41
  42 #define FTS_PAGE_SELECT_REG             0x007F
  43
  44 #define FTS_WATCHDOG_TIME_PRESET        0x000B
  45 #define FTS_WATCHDOG_CONTROL            0x5081
  46
  47 #define FTS_NO_FAN_SENSORS              0x08
  48 #define FTS_NO_TEMP_SENSORS             0x10
  49 #define FTS_NO_VOLT_SENSORS             0x04
  50
  51 static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
  52
  53 static const struct i2c_device_id fts_id[] = {
  54         { "ftsteutates", 0 },
  55         { }
  56 };
  57 MODULE_DEVICE_TABLE(i2c, fts_id);
  58
  59 enum WATCHDOG_RESOLUTION {
  60         seconds = 1,
  61         minutes = 60
  62 };
  63
  64 struct fts_data {
  65         struct i2c_client *client;
  66         /* update sensor data lock */
  67         struct mutex update_lock;
  68         /* read/write register lock */
  69         struct mutex access_lock;
  70         unsigned long last_updated; /* in jiffies */
  71         struct watchdog_device wdd;
  72         enum WATCHDOG_RESOLUTION resolution;
  73         bool valid; /* false until following fields are valid */
  74
  75         u8 volt[FTS_NO_VOLT_SENSORS];
  76
  77         u8 temp_input[FTS_NO_TEMP_SENSORS];
  78         u8 temp_alarm;
  79
  80         u8 fan_present;
  81         u8 fan_input[FTS_NO_FAN_SENSORS]; /* in rps */
  82         u8 fan_source[FTS_NO_FAN_SENSORS];
  83         u8 fan_alarm;
  84 };
  85
  86 #define FTS_REG_FAN_INPUT(idx) ((idx) + 0x20)
  87 #define FTS_REG_FAN_SOURCE(idx) ((idx) + 0x30)
  88 #define FTS_REG_FAN_CONTROL(idx) (((idx) << 16) + 0x4881)
  89
  90 #define FTS_REG_TEMP_INPUT(idx) ((idx) + 0x40)
  91 #define FTS_REG_TEMP_CONTROL(idx) (((idx) << 16) + 0x0681)
  92
  93 #define FTS_REG_VOLT(idx) ((idx) + 0x18)
  94
  95 /*****************************************************************************/
  96 /* I2C Helper functions                                                      */
  97 /*****************************************************************************/
  98 static int fts_read_byte(struct i2c_client *client, unsigned short reg)
  99 {
 100         int ret;
 101         unsigned char page = reg >> 8;
 102         struct fts_data *data = dev_get_drvdata(&client->dev);
 103
 104         mutex_lock(&data->access_lock);
 105
 106         dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
 107         ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
 108         if (ret < 0)
 109                 goto error;
 110
 111         reg &= 0xFF;
 112         ret = i2c_smbus_read_byte_data(client, reg);
 113         dev_dbg(&client->dev, "read - reg: 0x%.02x: val: 0x%.02x\n", reg, ret);
 114
 115 error:
 116         mutex_unlock(&data->access_lock);
 117         return ret;
 118 }
 119
 120 static int fts_write_byte(struct i2c_client *client, unsigned short reg,
 121                           unsigned char value)
 122 {
 123         int ret;
 124         unsigned char page = reg >> 8;
 125         struct fts_data *data = dev_get_drvdata(&client->dev);
 126
 127         mutex_lock(&data->access_lock);
 128
 129         dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
 130         ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
 131         if (ret < 0)
 132                 goto error;
 133
 134         reg &= 0xFF;
 135         dev_dbg(&client->dev,
 136                 "write - reg: 0x%.02x: val: 0x%.02x\n", reg, value);
 137         ret = i2c_smbus_write_byte_data(client, reg, value);
 138
 139 error:
 140         mutex_unlock(&data->access_lock);
 141         return ret;
 142 }
 143
 144 /*****************************************************************************/
 145 /* Data Updater Helper function                                              */
 146 /*****************************************************************************/
 147 static int fts_update_device(struct fts_data *data)
 148 {
 149         int i;
 150         int err = 0;
 151
 152         mutex_lock(&data->update_lock);
 153         if (!time_after(jiffies, data->last_updated + 2 * HZ) && data->valid)
 154                 goto exit;
 155
 156         err = fts_read_byte(data->client, FTS_DEVICE_STATUS_REG);
 157         if (err < 0)
 158                 goto exit;
 159
 160         data->valid = !!(err & 0x02); /* Data not ready yet */
 161         if (unlikely(!data->valid)) {
 162                 err = -EAGAIN;
 163                 goto exit;
 164         }
 165
 166         err = fts_read_byte(data->client, FTS_FAN_PRESENT_REG);
 167         if (err < 0)
 168                 goto exit;
 169         data->fan_present = err;
 170
 171         err = fts_read_byte(data->client, FTS_FAN_EVENT_REG);
 172         if (err < 0)
 173                 goto exit;
 174         data->fan_alarm = err;
 175
 176         for (i = 0; i < FTS_NO_FAN_SENSORS; i++) {
 177                 if (data->fan_present & BIT(i)) {
 178                         err = fts_read_byte(data->client, FTS_REG_FAN_INPUT(i));
 179                         if (err < 0)
 180                                 goto exit;
 181                         data->fan_input[i] = err;
 182
 183                         err = fts_read_byte(data->client,
 184                                             FTS_REG_FAN_SOURCE(i));
 185                         if (err < 0)
 186                                 goto exit;
 187                         data->fan_source[i] = err;
 188                 } else {
 189                         data->fan_input[i] = 0;
 190                         data->fan_source[i] = 0;
 191                 }
 192         }
 193
 194         err = fts_read_byte(data->client, FTS_SENSOR_EVENT_REG);
 195         if (err < 0)
 196                 goto exit;
 197         data->temp_alarm = err;
 198
 199         for (i = 0; i < FTS_NO_TEMP_SENSORS; i++) {
 200                 err = fts_read_byte(data->client, FTS_REG_TEMP_INPUT(i));
 201                 if (err < 0)
 202                         goto exit;
 203                 data->temp_input[i] = err;
 204         }
 205
 206         for (i = 0; i < FTS_NO_VOLT_SENSORS; i++) {
 207                 err = fts_read_byte(data->client, FTS_REG_VOLT(i));
 208                 if (err < 0)
 209                         goto exit;
 210                 data->volt[i] = err;
 211         }
 212         data->last_updated = jiffies;
 213         err = 0;
 214 exit:
 215         mutex_unlock(&data->update_lock);
 216         return err;
 217 }
 218
 219 /*****************************************************************************/
 220 /* Watchdog functions                                                        */
 221 /*****************************************************************************/
 222 static int fts_wd_set_resolution(struct fts_data *data,
 223                                  enum WATCHDOG_RESOLUTION resolution)
 224 {
 225         int ret;
 226
 227         if (data->resolution == resolution)
 228                 return 0;
 229
 230         ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
 231         if (ret < 0)
 232                 return ret;
 233
 234         if ((resolution == seconds && ret & BIT(1)) ||
 235             (resolution == minutes && (ret & BIT(1)) == 0)) {
 236                 data->resolution = resolution;
 237                 return 0;
 238         }
 239
 240         if (resolution == seconds)
 241                 ret |= BIT(1);
 242         else
 243                 ret &= ~BIT(1);
 244
 245         ret = fts_write_byte(data->client, FTS_WATCHDOG_CONTROL, ret);
 246         if (ret < 0)
 247                 return ret;
 248
 249         data->resolution = resolution;
 250         return ret;
 251 }
 252
 253 static int fts_wd_set_timeout(struct watchdog_device *wdd, unsigned int timeout)
 254 {
 255         struct fts_data *data;
 256         enum WATCHDOG_RESOLUTION resolution = seconds;
 257         int ret;
 258
 259         data = watchdog_get_drvdata(wdd);
 260         /* switch watchdog resolution to minutes if timeout does not fit
 261          * into a byte
 262          */
 263         if (timeout > 0xFF) {
 264                 timeout = DIV_ROUND_UP(timeout, 60) * 60;
 265                 resolution = minutes;
 266         }
 267
 268         ret = fts_wd_set_resolution(data, resolution);
 269         if (ret < 0)
 270                 return ret;
 271
 272         wdd->timeout = timeout;
 273         return 0;
 274 }
 275
 276 static int fts_wd_start(struct watchdog_device *wdd)
 277 {
 278         struct fts_data *data = watchdog_get_drvdata(wdd);
 279
 280         return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET,
 281                               wdd->timeout / (u8)data->resolution);
 282 }
 283
 284 static int fts_wd_stop(struct watchdog_device *wdd)
 285 {
 286         struct fts_data *data;
 287
 288         data = watchdog_get_drvdata(wdd);
 289         return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET, 0);
 290 }
 291
 292 static const struct watchdog_info fts_wd_info = {
 293         .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
 294         .identity = "FTS Teutates Hardware Watchdog",
 295 };
 296
 297 static const struct watchdog_ops fts_wd_ops = {
 298         .owner = THIS_MODULE,
 299         .start = fts_wd_start,
 300         .stop = fts_wd_stop,
 301         .set_timeout = fts_wd_set_timeout,
 302 };
 303
 304 static int fts_watchdog_init(struct fts_data *data)
 305 {
 306         int timeout, ret;
 307
 308         watchdog_set_drvdata(&data->wdd, data);
 309
 310         timeout = fts_read_byte(data->client, FTS_WATCHDOG_TIME_PRESET);
 311         if (timeout < 0)
 312                 return timeout;
 313
 314         /* watchdog not running, set timeout to a default of 60 sec. */
 315         if (timeout == 0) {
 316                 ret = fts_wd_set_resolution(data, seconds);
 317                 if (ret < 0)
 318                         return ret;
 319                 data->wdd.timeout = 60;
 320         } else {
 321                 ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
 322                 if (ret < 0)
 323                         return ret;
 324
 325                 data->resolution = ret & BIT(1) ? seconds : minutes;
 326                 data->wdd.timeout = timeout * (u8)data->resolution;
 327                 set_bit(WDOG_HW_RUNNING, &data->wdd.status);
 328         }
 329
 330         /* Register our watchdog part */
 331         data->wdd.info = &fts_wd_info;
 332         data->wdd.ops = &fts_wd_ops;
 333         data->wdd.parent = &data->client->dev;
 334         data->wdd.min_timeout = 1;
 335
 336         /* max timeout 255 minutes. */
 337         data->wdd.max_hw_heartbeat_ms = 0xFF * 60 * MSEC_PER_SEC;
 338
 339         return watchdog_register_device(&data->wdd);
 340 }
 341
 342 /*****************************************************************************/
 343 /* SysFS handler functions                                                   */
 344 /*****************************************************************************/
 345 static ssize_t in_value_show(struct device *dev,
 346                              struct device_attribute *devattr, char *buf)
 347 {
 348         struct fts_data *data = dev_get_drvdata(dev);
 349         int index = to_sensor_dev_attr(devattr)->index;
 350         int err;
 351
 352         err = fts_update_device(data);
 353         if (err < 0)
 354                 return err;
 355
 356         return sprintf(buf, "%u\n", data->volt[index]);
 357 }
 358
 359 static ssize_t temp_value_show(struct device *dev,
 360                                struct device_attribute *devattr, char *buf)
 361 {
 362         struct fts_data *data = dev_get_drvdata(dev);
 363         int index = to_sensor_dev_attr(devattr)->index;
 364         int err;
 365
 366         err = fts_update_device(data);
 367         if (err < 0)
 368                 return err;
 369
 370         return sprintf(buf, "%u\n", data->temp_input[index]);
 371 }
 372
 373 static ssize_t temp_fault_show(struct device *dev,
 374                                struct device_attribute *devattr, char *buf)
 375 {
 376         struct fts_data *data = dev_get_drvdata(dev);
 377         int index = to_sensor_dev_attr(devattr)->index;
 378         int err;
 379
 380         err = fts_update_device(data);
 381         if (err < 0)
 382                 return err;
 383
 384         /* 00h Temperature = Sensor Error */
 385         return sprintf(buf, "%d\n", data->temp_input[index] == 0);
 386 }
 387
 388 static ssize_t temp_alarm_show(struct device *dev,
 389                                struct device_attribute *devattr, char *buf)
 390 {
 391         struct fts_data *data = dev_get_drvdata(dev);
 392         int index = to_sensor_dev_attr(devattr)->index;
 393         int err;
 394
 395         err = fts_update_device(data);
 396         if (err < 0)
 397                 return err;
 398
 399         return sprintf(buf, "%u\n", !!(data->temp_alarm & BIT(index)));
 400 }
 401
 402 static ssize_t
 403 temp_alarm_store(struct device *dev, struct device_attribute *devattr,
 404                  const char *buf, size_t count)
 405 {
 406         struct fts_data *data = dev_get_drvdata(dev);
 407         int index = to_sensor_dev_attr(devattr)->index;
 408         long ret;
 409
 410         ret = fts_update_device(data);
 411         if (ret < 0)
 412                 return ret;
 413
 414         if (kstrtoul(buf, 10, &ret) || ret != 0)
 415                 return -EINVAL;
 416
 417         mutex_lock(&data->update_lock);
 418         ret = fts_read_byte(data->client, FTS_REG_TEMP_CONTROL(index));
 419         if (ret < 0)
 420                 goto error;
 421
 422         ret = fts_write_byte(data->client, FTS_REG_TEMP_CONTROL(index),
 423                              ret | 0x1);
 424         if (ret < 0)
 425                 goto error;
 426
 427         data->valid = false;
 428         ret = count;
 429 error:
 430         mutex_unlock(&data->update_lock);
 431         return ret;
 432 }
 433
 434 static ssize_t fan_value_show(struct device *dev,
 435                               struct device_attribute *devattr, char *buf)
 436 {
 437         struct fts_data *data = dev_get_drvdata(dev);
 438         int index = to_sensor_dev_attr(devattr)->index;
 439         int err;
 440
 441         err = fts_update_device(data);
 442         if (err < 0)
 443                 return err;
 444
 445         return sprintf(buf, "%u\n", data->fan_input[index]);
 446 }
 447
 448 static ssize_t fan_source_show(struct device *dev,
 449                                struct device_attribute *devattr, char *buf)
 450 {
 451         struct fts_data *data = dev_get_drvdata(dev);
 452         int index = to_sensor_dev_attr(devattr)->index;
 453         int err;
 454
 455         err = fts_update_device(data);
 456         if (err < 0)
 457                 return err;
 458
 459         return sprintf(buf, "%u\n", data->fan_source[index]);
 460 }
 461
 462 static ssize_t fan_alarm_show(struct device *dev,
 463                               struct device_attribute *devattr, char *buf)
 464 {
 465         struct fts_data *data = dev_get_drvdata(dev);
 466         int index = to_sensor_dev_attr(devattr)->index;
 467         int err;
 468
 469         err = fts_update_device(data);
 470         if (err < 0)
 471                 return err;
 472
 473         return sprintf(buf, "%d\n", !!(data->fan_alarm & BIT(index)));
 474 }
 475
 476 static ssize_t
 477 fan_alarm_store(struct device *dev, struct device_attribute *devattr,
 478                 const char *buf, size_t count)
 479 {
 480         struct fts_data *data = dev_get_drvdata(dev);
 481         int index = to_sensor_dev_attr(devattr)->index;
 482         long ret;
 483
 484         ret = fts_update_device(data);
 485         if (ret < 0)
 486                 return ret;
 487
 488         if (kstrtoul(buf, 10, &ret) || ret != 0)
 489                 return -EINVAL;
 490
 491         mutex_lock(&data->update_lock);
 492         ret = fts_read_byte(data->client, FTS_REG_FAN_CONTROL(index));
 493         if (ret < 0)
 494                 goto error;
 495
 496         ret = fts_write_byte(data->client, FTS_REG_FAN_CONTROL(index),
 497                              ret | 0x1);
 498         if (ret < 0)
 499                 goto error;
 500
 501         data->valid = false;
 502         ret = count;
 503 error:
 504         mutex_unlock(&data->update_lock);
 505         return ret;
 506 }
 507
 508 /*****************************************************************************/
 509 /* SysFS structs                                                             */
 510 /*****************************************************************************/
 511
 512 /* Temperature sensors */
 513 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_value, 0);
 514 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_value, 1);
 515 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_value, 2);
 516 static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_value, 3);
 517 static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_value, 4);
 518 static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_value, 5);
 519 static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_value, 6);
 520 static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_value, 7);
 521 static SENSOR_DEVICE_ATTR_RO(temp9_input, temp_value, 8);
 522 static SENSOR_DEVICE_ATTR_RO(temp10_input, temp_value, 9);
 523 static SENSOR_DEVICE_ATTR_RO(temp11_input, temp_value, 10);
 524 static SENSOR_DEVICE_ATTR_RO(temp12_input, temp_value, 11);
 525 static SENSOR_DEVICE_ATTR_RO(temp13_input, temp_value, 12);
 526 static SENSOR_DEVICE_ATTR_RO(temp14_input, temp_value, 13);
 527 static SENSOR_DEVICE_ATTR_RO(temp15_input, temp_value, 14);
 528 static SENSOR_DEVICE_ATTR_RO(temp16_input, temp_value, 15);
 529
 530 static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0);
 531 static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1);
 532 static SENSOR_DEVICE_ATTR_RO(temp3_fault, temp_fault, 2);
 533 static SENSOR_DEVICE_ATTR_RO(temp4_fault, temp_fault, 3);
 534 static SENSOR_DEVICE_ATTR_RO(temp5_fault, temp_fault, 4);
 535 static SENSOR_DEVICE_ATTR_RO(temp6_fault, temp_fault, 5);
 536 static SENSOR_DEVICE_ATTR_RO(temp7_fault, temp_fault, 6);
 537 static SENSOR_DEVICE_ATTR_RO(temp8_fault, temp_fault, 7);
 538 static SENSOR_DEVICE_ATTR_RO(temp9_fault, temp_fault, 8);
 539 static SENSOR_DEVICE_ATTR_RO(temp10_fault, temp_fault, 9);
 540 static SENSOR_DEVICE_ATTR_RO(temp11_fault, temp_fault, 10);
 541 static SENSOR_DEVICE_ATTR_RO(temp12_fault, temp_fault, 11);
 542 static SENSOR_DEVICE_ATTR_RO(temp13_fault, temp_fault, 12);
 543 static SENSOR_DEVICE_ATTR_RO(temp14_fault, temp_fault, 13);
 544 static SENSOR_DEVICE_ATTR_RO(temp15_fault, temp_fault, 14);
 545 static SENSOR_DEVICE_ATTR_RO(temp16_fault, temp_fault, 15);
 546
 547 static SENSOR_DEVICE_ATTR_RW(temp1_alarm, temp_alarm, 0);
 548 static SENSOR_DEVICE_ATTR_RW(temp2_alarm, temp_alarm, 1);
 549 static SENSOR_DEVICE_ATTR_RW(temp3_alarm, temp_alarm, 2);
 550 static SENSOR_DEVICE_ATTR_RW(temp4_alarm, temp_alarm, 3);
 551 static SENSOR_DEVICE_ATTR_RW(temp5_alarm, temp_alarm, 4);
 552 static SENSOR_DEVICE_ATTR_RW(temp6_alarm, temp_alarm, 5);
 553 static SENSOR_DEVICE_ATTR_RW(temp7_alarm, temp_alarm, 6);
 554 static SENSOR_DEVICE_ATTR_RW(temp8_alarm, temp_alarm, 7);
 555 static SENSOR_DEVICE_ATTR_RW(temp9_alarm, temp_alarm, 8);
 556 static SENSOR_DEVICE_ATTR_RW(temp10_alarm, temp_alarm, 9);
 557 static SENSOR_DEVICE_ATTR_RW(temp11_alarm, temp_alarm, 10);
 558 static SENSOR_DEVICE_ATTR_RW(temp12_alarm, temp_alarm, 11);
 559 static SENSOR_DEVICE_ATTR_RW(temp13_alarm, temp_alarm, 12);
 560 static SENSOR_DEVICE_ATTR_RW(temp14_alarm, temp_alarm, 13);
 561 static SENSOR_DEVICE_ATTR_RW(temp15_alarm, temp_alarm, 14);
 562 static SENSOR_DEVICE_ATTR_RW(temp16_alarm, temp_alarm, 15);
 563
 564 static struct attribute *fts_temp_attrs[] = {
 565         &sensor_dev_attr_temp1_input.dev_attr.attr,
 566         &sensor_dev_attr_temp2_input.dev_attr.attr,
 567         &sensor_dev_attr_temp3_input.dev_attr.attr,
 568         &sensor_dev_attr_temp4_input.dev_attr.attr,
 569         &sensor_dev_attr_temp5_input.dev_attr.attr,
 570         &sensor_dev_attr_temp6_input.dev_attr.attr,
 571         &sensor_dev_attr_temp7_input.dev_attr.attr,
 572         &sensor_dev_attr_temp8_input.dev_attr.attr,
 573         &sensor_dev_attr_temp9_input.dev_attr.attr,
 574         &sensor_dev_attr_temp10_input.dev_attr.attr,
 575         &sensor_dev_attr_temp11_input.dev_attr.attr,
 576         &sensor_dev_attr_temp12_input.dev_attr.attr,
 577         &sensor_dev_attr_temp13_input.dev_attr.attr,
 578         &sensor_dev_attr_temp14_input.dev_attr.attr,
 579         &sensor_dev_attr_temp15_input.dev_attr.attr,
 580         &sensor_dev_attr_temp16_input.dev_attr.attr,
 581
 582         &sensor_dev_attr_temp1_fault.dev_attr.attr,
 583         &sensor_dev_attr_temp2_fault.dev_attr.attr,
 584         &sensor_dev_attr_temp3_fault.dev_attr.attr,
 585         &sensor_dev_attr_temp4_fault.dev_attr.attr,
 586         &sensor_dev_attr_temp5_fault.dev_attr.attr,
 587         &sensor_dev_attr_temp6_fault.dev_attr.attr,
 588         &sensor_dev_attr_temp7_fault.dev_attr.attr,
 589         &sensor_dev_attr_temp8_fault.dev_attr.attr,
 590         &sensor_dev_attr_temp9_fault.dev_attr.attr,
 591         &sensor_dev_attr_temp10_fault.dev_attr.attr,
 592         &sensor_dev_attr_temp11_fault.dev_attr.attr,
 593         &sensor_dev_attr_temp12_fault.dev_attr.attr,
 594         &sensor_dev_attr_temp13_fault.dev_attr.attr,
 595         &sensor_dev_attr_temp14_fault.dev_attr.attr,
 596         &sensor_dev_attr_temp15_fault.dev_attr.attr,
 597         &sensor_dev_attr_temp16_fault.dev_attr.attr,
 598
 599         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 600         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
 601         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
 602         &sensor_dev_attr_temp4_alarm.dev_attr.attr,
 603         &sensor_dev_attr_temp5_alarm.dev_attr.attr,
 604         &sensor_dev_attr_temp6_alarm.dev_attr.attr,
 605         &sensor_dev_attr_temp7_alarm.dev_attr.attr,
 606         &sensor_dev_attr_temp8_alarm.dev_attr.attr,
 607         &sensor_dev_attr_temp9_alarm.dev_attr.attr,
 608         &sensor_dev_attr_temp10_alarm.dev_attr.attr,
 609         &sensor_dev_attr_temp11_alarm.dev_attr.attr,
 610         &sensor_dev_attr_temp12_alarm.dev_attr.attr,
 611         &sensor_dev_attr_temp13_alarm.dev_attr.attr,
 612         &sensor_dev_attr_temp14_alarm.dev_attr.attr,
 613         &sensor_dev_attr_temp15_alarm.dev_attr.attr,
 614         &sensor_dev_attr_temp16_alarm.dev_attr.attr,
 615         NULL
 616 };
 617
 618 /* Fans */
 619 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_value, 0);
 620 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_value, 1);
 621 static SENSOR_DEVICE_ATTR_RO(fan3_input, fan_value, 2);
 622 static SENSOR_DEVICE_ATTR_RO(fan4_input, fan_value, 3);
 623 static SENSOR_DEVICE_ATTR_RO(fan5_input, fan_value, 4);
 624 static SENSOR_DEVICE_ATTR_RO(fan6_input, fan_value, 5);
 625 static SENSOR_DEVICE_ATTR_RO(fan7_input, fan_value, 6);
 626 static SENSOR_DEVICE_ATTR_RO(fan8_input, fan_value, 7);
 627
 628 static SENSOR_DEVICE_ATTR_RO(fan1_source, fan_source, 0);
 629 static SENSOR_DEVICE_ATTR_RO(fan2_source, fan_source, 1);
 630 static SENSOR_DEVICE_ATTR_RO(fan3_source, fan_source, 2);
 631 static SENSOR_DEVICE_ATTR_RO(fan4_source, fan_source, 3);
 632 static SENSOR_DEVICE_ATTR_RO(fan5_source, fan_source, 4);
 633 static SENSOR_DEVICE_ATTR_RO(fan6_source, fan_source, 5);
 634 static SENSOR_DEVICE_ATTR_RO(fan7_source, fan_source, 6);
 635 static SENSOR_DEVICE_ATTR_RO(fan8_source, fan_source, 7);
 636
 637 static SENSOR_DEVICE_ATTR_RW(fan1_alarm, fan_alarm, 0);
 638 static SENSOR_DEVICE_ATTR_RW(fan2_alarm, fan_alarm, 1);
 639 static SENSOR_DEVICE_ATTR_RW(fan3_alarm, fan_alarm, 2);
 640 static SENSOR_DEVICE_ATTR_RW(fan4_alarm, fan_alarm, 3);
 641 static SENSOR_DEVICE_ATTR_RW(fan5_alarm, fan_alarm, 4);
 642 static SENSOR_DEVICE_ATTR_RW(fan6_alarm, fan_alarm, 5);
 643 static SENSOR_DEVICE_ATTR_RW(fan7_alarm, fan_alarm, 6);
 644 static SENSOR_DEVICE_ATTR_RW(fan8_alarm, fan_alarm, 7);
 645
 646 static struct attribute *fts_fan_attrs[] = {
 647         &sensor_dev_attr_fan1_input.dev_attr.attr,
 648         &sensor_dev_attr_fan2_input.dev_attr.attr,
 649         &sensor_dev_attr_fan3_input.dev_attr.attr,
 650         &sensor_dev_attr_fan4_input.dev_attr.attr,
 651         &sensor_dev_attr_fan5_input.dev_attr.attr,
 652         &sensor_dev_attr_fan6_input.dev_attr.attr,
 653         &sensor_dev_attr_fan7_input.dev_attr.attr,
 654         &sensor_dev_attr_fan8_input.dev_attr.attr,
 655
 656         &sensor_dev_attr_fan1_source.dev_attr.attr,
 657         &sensor_dev_attr_fan2_source.dev_attr.attr,
 658         &sensor_dev_attr_fan3_source.dev_attr.attr,
 659         &sensor_dev_attr_fan4_source.dev_attr.attr,
 660         &sensor_dev_attr_fan5_source.dev_attr.attr,
 661         &sensor_dev_attr_fan6_source.dev_attr.attr,
 662         &sensor_dev_attr_fan7_source.dev_attr.attr,
 663         &sensor_dev_attr_fan8_source.dev_attr.attr,
 664
 665         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 666         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 667         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
 668         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
 669         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
 670         &sensor_dev_attr_fan6_alarm.dev_attr.attr,
 671         &sensor_dev_attr_fan7_alarm.dev_attr.attr,
 672         &sensor_dev_attr_fan8_alarm.dev_attr.attr,
 673         NULL
 674 };
 675
 676 /* Voltages */
 677 static SENSOR_DEVICE_ATTR_RO(in1_input, in_value, 0);
 678 static SENSOR_DEVICE_ATTR_RO(in2_input, in_value, 1);
 679 static SENSOR_DEVICE_ATTR_RO(in3_input, in_value, 2);
 680 static SENSOR_DEVICE_ATTR_RO(in4_input, in_value, 3);
 681 static struct attribute *fts_voltage_attrs[] = {
 682         &sensor_dev_attr_in1_input.dev_attr.attr,
 683         &sensor_dev_attr_in2_input.dev_attr.attr,
 684         &sensor_dev_attr_in3_input.dev_attr.attr,
 685         &sensor_dev_attr_in4_input.dev_attr.attr,
 686         NULL
 687 };
 688
 689 static const struct attribute_group fts_voltage_attr_group = {
 690         .attrs = fts_voltage_attrs
 691 };
 692
 693 static const struct attribute_group fts_temp_attr_group = {
 694         .attrs = fts_temp_attrs
 695 };
 696
 697 static const struct attribute_group fts_fan_attr_group = {
 698         .attrs = fts_fan_attrs
 699 };
 700
 701 static const struct attribute_group *fts_attr_groups[] = {
 702         &fts_voltage_attr_group,
 703         &fts_temp_attr_group,
 704         &fts_fan_attr_group,
 705         NULL
 706 };
 707
 708 /*****************************************************************************/
 709 /* Module initialization / remove functions                                  */
 710 /*****************************************************************************/
 711 static int fts_detect(struct i2c_client *client,
 712                       struct i2c_board_info *info)
 713 {
 714         int val;
 715
 716         /* detection works with revision greater or equal to 0x2b */
 717         val = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
 718         if (val < 0x2b)
 719                 return -ENODEV;
 720
 721         /* Device Detect Regs must have 0x17 0x34 and 0x54 */
 722         val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_1);
 723         if (val != 0x17)
 724                 return -ENODEV;
 725
 726         val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_2);
 727         if (val != 0x34)
 728                 return -ENODEV;
 729
 730         val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_3);
 731         if (val != 0x54)
 732                 return -ENODEV;
 733
 734         /*
 735          * 0x10 == Baseboard Management Controller, 0x01 == Teutates
 736          * Device ID Reg needs to be 0x11
 737          */
 738         val = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
 739         if (val != 0x11)
 740                 return -ENODEV;
 741
 742         strlcpy(info->type, fts_id[0].name, I2C_NAME_SIZE);
 743         info->flags = 0;
 744         return 0;
 745 }
 746
 747 static int fts_remove(struct i2c_client *client)
 748 {
 749         struct fts_data *data = dev_get_drvdata(&client->dev);
 750
 751         watchdog_unregister_device(&data->wdd);
 752         return 0;
 753 }
 754
 755 static int fts_probe(struct i2c_client *client)
 756 {
 757         u8 revision;
 758         struct fts_data *data;
 759         int err;
 760         s8 deviceid;
 761         struct device *hwmon_dev;
 762
 763         if (client->addr != 0x73)
 764                 return -ENODEV;
 765
 766         /* Baseboard Management Controller check */
 767         deviceid = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
 768         if (deviceid > 0 && (deviceid & 0xF0) == 0x10) {
 769                 switch (deviceid & 0x0F) {
 770                 case 0x01:
 771                         break;
 772                 default:
 773                         dev_dbg(&client->dev,
 774                                 "No Baseboard Management Controller\n");
 775                         return -ENODEV;
 776                 }
 777         } else {
 778                 dev_dbg(&client->dev, "No fujitsu board\n");
 779                 return -ENODEV;
 780         }
 781
 782         data = devm_kzalloc(&client->dev, sizeof(struct fts_data),
 783                             GFP_KERNEL);
 784         if (!data)
 785                 return -ENOMEM;
 786
 787         mutex_init(&data->update_lock);
 788         mutex_init(&data->access_lock);
 789         data->client = client;
 790         dev_set_drvdata(&client->dev, data);
 791
 792         err = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
 793         if (err < 0)
 794                 return err;
 795         revision = err;
 796
 797         hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
 798                                                            "ftsteutates",
 799                                                            data,
 800                                                            fts_attr_groups);
 801         if (IS_ERR(hwmon_dev))
 802                 return PTR_ERR(hwmon_dev);
 803
 804         err = fts_watchdog_init(data);
 805         if (err)
 806                 return err;
 807
 808         dev_info(&client->dev, "Detected FTS Teutates chip, revision: %d.%d\n",
 809                  (revision & 0xF0) >> 4, revision & 0x0F);
 810         return 0;
 811 }
 812
 813 /*****************************************************************************/
 814 /* Module Details                                                            */
 815 /*****************************************************************************/
 816 static struct i2c_driver fts_driver = {
 817         .class = I2C_CLASS_HWMON,
 818         .driver = {
 819                 .name = "ftsteutates",
 820         },
 821         .id_table = fts_id,
 822         .probe_new = fts_probe,
 823         .remove = fts_remove,
 824         .detect = fts_detect,
 825         .address_list = normal_i2c,
 826 };
 827
 828 module_i2c_driver(fts_driver);
 829
 830 MODULE_AUTHOR("Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>");
 831 MODULE_DESCRIPTION("FTS Teutates driver");
 832 MODULE_LICENSE("GPL");