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"); 833