1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * w83793.c - Linux kernel driver for hardware monitoring 4 * Copyright (C) 2006 Winbond Electronics Corp. 5 * Yuan Mu 6 * Rudolf Marek <r.marek@assembler.cz> 7 * Copyright (C) 2009-2010 Sven Anders <anders@anduras.de>, ANDURAS AG. 8 * Watchdog driver part 9 * (Based partially on fschmd driver, 10 * Copyright 2007-2008 by Hans de Goede) 11 */ 12 13 /* 14 * Supports following chips: 15 * 16 * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA 17 * w83793 10 12 8 6 0x7b 0x5ca3 yes no 18 */ 19 20 #include <linux/module.h> 21 #include <linux/init.h> 22 #include <linux/slab.h> 23 #include <linux/i2c.h> 24 #include <linux/hwmon.h> 25 #include <linux/hwmon-vid.h> 26 #include <linux/hwmon-sysfs.h> 27 #include <linux/err.h> 28 #include <linux/mutex.h> 29 #include <linux/fs.h> 30 #include <linux/watchdog.h> 31 #include <linux/miscdevice.h> 32 #include <linux/uaccess.h> 33 #include <linux/kref.h> 34 #include <linux/notifier.h> 35 #include <linux/reboot.h> 36 #include <linux/jiffies.h> 37 #include <linux/stringify.h> 38 39 /* Default values */ 40 #define WATCHDOG_TIMEOUT 2 /* 2 minute default timeout */ 41 42 /* Addresses to scan */ 43 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, 44 I2C_CLIENT_END }; 45 46 /* Insmod parameters */ 47 48 static unsigned short force_subclients[4]; 49 module_param_array(force_subclients, short, NULL, 0); 50 MODULE_PARM_DESC(force_subclients, 51 "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}"); 52 53 static bool reset; 54 module_param(reset, bool, 0); 55 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended"); 56 57 static int timeout = WATCHDOG_TIMEOUT; /* default timeout in minutes */ 58 module_param(timeout, int, 0); 59 MODULE_PARM_DESC(timeout, 60 "Watchdog timeout in minutes. 2<= timeout <=255 (default=" 61 __stringify(WATCHDOG_TIMEOUT) ")"); 62 63 static bool nowayout = WATCHDOG_NOWAYOUT; 64 module_param(nowayout, bool, 0); 65 MODULE_PARM_DESC(nowayout, 66 "Watchdog cannot be stopped once started (default=" 67 __stringify(WATCHDOG_NOWAYOUT) ")"); 68 69 /* 70 * Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved 71 * as ID, Bank Select registers 72 */ 73 #define W83793_REG_BANKSEL 0x00 74 #define W83793_REG_VENDORID 0x0d 75 #define W83793_REG_CHIPID 0x0e 76 #define W83793_REG_DEVICEID 0x0f 77 78 #define W83793_REG_CONFIG 0x40 79 #define W83793_REG_MFC 0x58 80 #define W83793_REG_FANIN_CTRL 0x5c 81 #define W83793_REG_FANIN_SEL 0x5d 82 #define W83793_REG_I2C_ADDR 0x0b 83 #define W83793_REG_I2C_SUBADDR 0x0c 84 #define W83793_REG_VID_INA 0x05 85 #define W83793_REG_VID_INB 0x06 86 #define W83793_REG_VID_LATCHA 0x07 87 #define W83793_REG_VID_LATCHB 0x08 88 #define W83793_REG_VID_CTRL 0x59 89 90 #define W83793_REG_WDT_LOCK 0x01 91 #define W83793_REG_WDT_ENABLE 0x02 92 #define W83793_REG_WDT_STATUS 0x03 93 #define W83793_REG_WDT_TIMEOUT 0x04 94 95 static u16 W83793_REG_TEMP_MODE[2] = { 0x5e, 0x5f }; 96 97 #define TEMP_READ 0 98 #define TEMP_CRIT 1 99 #define TEMP_CRIT_HYST 2 100 #define TEMP_WARN 3 101 #define TEMP_WARN_HYST 4 102 /* 103 * only crit and crit_hyst affect real-time alarm status 104 * current crit crit_hyst warn warn_hyst 105 */ 106 static u16 W83793_REG_TEMP[][5] = { 107 {0x1c, 0x78, 0x79, 0x7a, 0x7b}, 108 {0x1d, 0x7c, 0x7d, 0x7e, 0x7f}, 109 {0x1e, 0x80, 0x81, 0x82, 0x83}, 110 {0x1f, 0x84, 0x85, 0x86, 0x87}, 111 {0x20, 0x88, 0x89, 0x8a, 0x8b}, 112 {0x21, 0x8c, 0x8d, 0x8e, 0x8f}, 113 }; 114 115 #define W83793_REG_TEMP_LOW_BITS 0x22 116 117 #define W83793_REG_BEEP(index) (0x53 + (index)) 118 #define W83793_REG_ALARM(index) (0x4b + (index)) 119 120 #define W83793_REG_CLR_CHASSIS 0x4a /* SMI MASK4 */ 121 #define W83793_REG_IRQ_CTRL 0x50 122 #define W83793_REG_OVT_CTRL 0x51 123 #define W83793_REG_OVT_BEEP 0x52 124 125 #define IN_READ 0 126 #define IN_MAX 1 127 #define IN_LOW 2 128 static const u16 W83793_REG_IN[][3] = { 129 /* Current, High, Low */ 130 {0x10, 0x60, 0x61}, /* Vcore A */ 131 {0x11, 0x62, 0x63}, /* Vcore B */ 132 {0x12, 0x64, 0x65}, /* Vtt */ 133 {0x14, 0x6a, 0x6b}, /* VSEN1 */ 134 {0x15, 0x6c, 0x6d}, /* VSEN2 */ 135 {0x16, 0x6e, 0x6f}, /* +3VSEN */ 136 {0x17, 0x70, 0x71}, /* +12VSEN */ 137 {0x18, 0x72, 0x73}, /* 5VDD */ 138 {0x19, 0x74, 0x75}, /* 5VSB */ 139 {0x1a, 0x76, 0x77}, /* VBAT */ 140 }; 141 142 /* Low Bits of Vcore A/B Vtt Read/High/Low */ 143 static const u16 W83793_REG_IN_LOW_BITS[] = { 0x1b, 0x68, 0x69 }; 144 static u8 scale_in[] = { 2, 2, 2, 16, 16, 16, 8, 24, 24, 16 }; 145 static u8 scale_in_add[] = { 0, 0, 0, 0, 0, 0, 0, 150, 150, 0 }; 146 147 #define W83793_REG_FAN(index) (0x23 + 2 * (index)) /* High byte */ 148 #define W83793_REG_FAN_MIN(index) (0x90 + 2 * (index)) /* High byte */ 149 150 #define W83793_REG_PWM_DEFAULT 0xb2 151 #define W83793_REG_PWM_ENABLE 0x207 152 #define W83793_REG_PWM_UPTIME 0xc3 /* Unit in 0.1 second */ 153 #define W83793_REG_PWM_DOWNTIME 0xc4 /* Unit in 0.1 second */ 154 #define W83793_REG_TEMP_CRITICAL 0xc5 155 156 #define PWM_DUTY 0 157 #define PWM_START 1 158 #define PWM_NONSTOP 2 159 #define PWM_STOP_TIME 3 160 #define W83793_REG_PWM(index, nr) (((nr) == 0 ? 0xb3 : \ 161 (nr) == 1 ? 0x220 : 0x218) + (index)) 162 163 /* bit field, fan1 is bit0, fan2 is bit1 ... */ 164 #define W83793_REG_TEMP_FAN_MAP(index) (0x201 + (index)) 165 #define W83793_REG_TEMP_TOL(index) (0x208 + (index)) 166 #define W83793_REG_TEMP_CRUISE(index) (0x210 + (index)) 167 #define W83793_REG_PWM_STOP_TIME(index) (0x228 + (index)) 168 #define W83793_REG_SF2_TEMP(index, nr) (0x230 + ((index) << 4) + (nr)) 169 #define W83793_REG_SF2_PWM(index, nr) (0x238 + ((index) << 4) + (nr)) 170 171 static inline unsigned long FAN_FROM_REG(u16 val) 172 { 173 if ((val >= 0xfff) || (val == 0)) 174 return 0; 175 return 1350000UL / val; 176 } 177 178 static inline u16 FAN_TO_REG(long rpm) 179 { 180 if (rpm <= 0) 181 return 0x0fff; 182 return clamp_val((1350000 + (rpm >> 1)) / rpm, 1, 0xffe); 183 } 184 185 static inline unsigned long TIME_FROM_REG(u8 reg) 186 { 187 return reg * 100; 188 } 189 190 static inline u8 TIME_TO_REG(unsigned long val) 191 { 192 return clamp_val((val + 50) / 100, 0, 0xff); 193 } 194 195 static inline long TEMP_FROM_REG(s8 reg) 196 { 197 return reg * 1000; 198 } 199 200 static inline s8 TEMP_TO_REG(long val, s8 min, s8 max) 201 { 202 return clamp_val((val + (val < 0 ? -500 : 500)) / 1000, min, max); 203 } 204 205 struct w83793_data { 206 struct device *hwmon_dev; 207 struct mutex update_lock; 208 bool valid; /* true if following fields are valid */ 209 unsigned long last_updated; /* In jiffies */ 210 unsigned long last_nonvolatile; /* In jiffies, last time we update the 211 * nonvolatile registers 212 */ 213 214 u8 bank; 215 u8 vrm; 216 u8 vid[2]; 217 u8 in[10][3]; /* Register value, read/high/low */ 218 u8 in_low_bits[3]; /* Additional resolution for VCore A/B Vtt */ 219 220 u16 has_fan; /* Only fan1- fan5 has own pins */ 221 u16 fan[12]; /* Register value combine */ 222 u16 fan_min[12]; /* Register value combine */ 223 224 s8 temp[6][5]; /* current, crit, crit_hyst,warn, warn_hyst */ 225 u8 temp_low_bits; /* Additional resolution TD1-TD4 */ 226 u8 temp_mode[2]; /* byte 0: Temp D1-D4 mode each has 2 bits 227 * byte 1: Temp R1,R2 mode, each has 1 bit 228 */ 229 u8 temp_critical; /* If reached all fan will be at full speed */ 230 u8 temp_fan_map[6]; /* Temp controls which pwm fan, bit field */ 231 232 u8 has_pwm; 233 u8 has_temp; 234 u8 has_vid; 235 u8 pwm_enable; /* Register value, each Temp has 1 bit */ 236 u8 pwm_uptime; /* Register value */ 237 u8 pwm_downtime; /* Register value */ 238 u8 pwm_default; /* All fan default pwm, next poweron valid */ 239 u8 pwm[8][3]; /* Register value */ 240 u8 pwm_stop_time[8]; 241 u8 temp_cruise[6]; 242 243 u8 alarms[5]; /* realtime status registers */ 244 u8 beeps[5]; 245 u8 beep_enable; 246 u8 tolerance[3]; /* Temp tolerance(Smart Fan I/II) */ 247 u8 sf2_pwm[6][7]; /* Smart FanII: Fan duty cycle */ 248 u8 sf2_temp[6][7]; /* Smart FanII: Temp level point */ 249 250 /* watchdog */ 251 struct i2c_client *client; 252 struct mutex watchdog_lock; 253 struct list_head list; /* member of the watchdog_data_list */ 254 struct kref kref; 255 struct miscdevice watchdog_miscdev; 256 unsigned long watchdog_is_open; 257 char watchdog_expect_close; 258 char watchdog_name[10]; /* must be unique to avoid sysfs conflict */ 259 unsigned int watchdog_caused_reboot; 260 int watchdog_timeout; /* watchdog timeout in minutes */ 261 }; 262 263 /* 264 * Somewhat ugly :( global data pointer list with all devices, so that 265 * we can find our device data as when using misc_register. There is no 266 * other method to get to one's device data from the open file-op and 267 * for usage in the reboot notifier callback. 268 */ 269 static LIST_HEAD(watchdog_data_list); 270 271 /* Note this lock not only protect list access, but also data.kref access */ 272 static DEFINE_MUTEX(watchdog_data_mutex); 273 274 /* 275 * Release our data struct when we're detached from the i2c client *and* all 276 * references to our watchdog device are released 277 */ 278 static void w83793_release_resources(struct kref *ref) 279 { 280 struct w83793_data *data = container_of(ref, struct w83793_data, kref); 281 kfree(data); 282 } 283 284 static u8 w83793_read_value(struct i2c_client *client, u16 reg); 285 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value); 286 static int w83793_probe(struct i2c_client *client); 287 static int w83793_detect(struct i2c_client *client, 288 struct i2c_board_info *info); 289 static void w83793_remove(struct i2c_client *client); 290 static void w83793_init_client(struct i2c_client *client); 291 static void w83793_update_nonvolatile(struct device *dev); 292 static struct w83793_data *w83793_update_device(struct device *dev); 293 294 static const struct i2c_device_id w83793_id[] = { 295 { .name = "w83793" }, 296 { } 297 }; 298 MODULE_DEVICE_TABLE(i2c, w83793_id); 299 300 static struct i2c_driver w83793_driver = { 301 .class = I2C_CLASS_HWMON, 302 .driver = { 303 .name = "w83793", 304 }, 305 .probe = w83793_probe, 306 .remove = w83793_remove, 307 .id_table = w83793_id, 308 .detect = w83793_detect, 309 .address_list = normal_i2c, 310 }; 311 312 static ssize_t 313 vrm_show(struct device *dev, struct device_attribute *attr, char *buf) 314 { 315 struct w83793_data *data = dev_get_drvdata(dev); 316 return sprintf(buf, "%d\n", data->vrm); 317 } 318 319 static ssize_t 320 show_vid(struct device *dev, struct device_attribute *attr, char *buf) 321 { 322 struct w83793_data *data = w83793_update_device(dev); 323 struct sensor_device_attribute_2 *sensor_attr = 324 to_sensor_dev_attr_2(attr); 325 int index = sensor_attr->index; 326 327 return sprintf(buf, "%d\n", vid_from_reg(data->vid[index], data->vrm)); 328 } 329 330 static ssize_t 331 vrm_store(struct device *dev, struct device_attribute *attr, 332 const char *buf, size_t count) 333 { 334 struct w83793_data *data = dev_get_drvdata(dev); 335 unsigned long val; 336 int err; 337 338 err = kstrtoul(buf, 10, &val); 339 if (err) 340 return err; 341 342 if (val > 255) 343 return -EINVAL; 344 345 data->vrm = val; 346 return count; 347 } 348 349 #define ALARM_STATUS 0 350 #define BEEP_ENABLE 1 351 static ssize_t 352 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf) 353 { 354 struct w83793_data *data = w83793_update_device(dev); 355 struct sensor_device_attribute_2 *sensor_attr = 356 to_sensor_dev_attr_2(attr); 357 int nr = sensor_attr->nr; 358 int index = sensor_attr->index >> 3; 359 int bit = sensor_attr->index & 0x07; 360 u8 val; 361 362 if (nr == ALARM_STATUS) { 363 val = (data->alarms[index] >> (bit)) & 1; 364 } else { /* BEEP_ENABLE */ 365 val = (data->beeps[index] >> (bit)) & 1; 366 } 367 368 return sprintf(buf, "%u\n", val); 369 } 370 371 static ssize_t 372 store_beep(struct device *dev, struct device_attribute *attr, 373 const char *buf, size_t count) 374 { 375 struct i2c_client *client = to_i2c_client(dev); 376 struct w83793_data *data = i2c_get_clientdata(client); 377 struct sensor_device_attribute_2 *sensor_attr = 378 to_sensor_dev_attr_2(attr); 379 int index = sensor_attr->index >> 3; 380 int shift = sensor_attr->index & 0x07; 381 u8 beep_bit = 1 << shift; 382 unsigned long val; 383 int err; 384 385 err = kstrtoul(buf, 10, &val); 386 if (err) 387 return err; 388 389 if (val > 1) 390 return -EINVAL; 391 392 mutex_lock(&data->update_lock); 393 data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index)); 394 data->beeps[index] &= ~beep_bit; 395 data->beeps[index] |= val << shift; 396 w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]); 397 mutex_unlock(&data->update_lock); 398 399 return count; 400 } 401 402 static ssize_t 403 show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf) 404 { 405 struct w83793_data *data = w83793_update_device(dev); 406 return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01); 407 } 408 409 static ssize_t 410 store_beep_enable(struct device *dev, struct device_attribute *attr, 411 const char *buf, size_t count) 412 { 413 struct i2c_client *client = to_i2c_client(dev); 414 struct w83793_data *data = i2c_get_clientdata(client); 415 unsigned long val; 416 int err; 417 418 err = kstrtoul(buf, 10, &val); 419 if (err) 420 return err; 421 422 if (val > 1) 423 return -EINVAL; 424 425 mutex_lock(&data->update_lock); 426 data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP) 427 & 0xfd; 428 data->beep_enable |= val << 1; 429 w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable); 430 mutex_unlock(&data->update_lock); 431 432 return count; 433 } 434 435 /* Write 0 to clear chassis alarm */ 436 static ssize_t 437 store_chassis_clear(struct device *dev, 438 struct device_attribute *attr, const char *buf, 439 size_t count) 440 { 441 struct i2c_client *client = to_i2c_client(dev); 442 struct w83793_data *data = i2c_get_clientdata(client); 443 unsigned long val; 444 u8 reg; 445 int err; 446 447 err = kstrtoul(buf, 10, &val); 448 if (err) 449 return err; 450 if (val) 451 return -EINVAL; 452 453 mutex_lock(&data->update_lock); 454 reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS); 455 w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80); 456 data->valid = false; /* Force cache refresh */ 457 mutex_unlock(&data->update_lock); 458 return count; 459 } 460 461 #define FAN_INPUT 0 462 #define FAN_MIN 1 463 static ssize_t 464 show_fan(struct device *dev, struct device_attribute *attr, char *buf) 465 { 466 struct sensor_device_attribute_2 *sensor_attr = 467 to_sensor_dev_attr_2(attr); 468 int nr = sensor_attr->nr; 469 int index = sensor_attr->index; 470 struct w83793_data *data = w83793_update_device(dev); 471 u16 val; 472 473 if (nr == FAN_INPUT) 474 val = data->fan[index] & 0x0fff; 475 else 476 val = data->fan_min[index] & 0x0fff; 477 478 return sprintf(buf, "%lu\n", FAN_FROM_REG(val)); 479 } 480 481 static ssize_t 482 store_fan_min(struct device *dev, struct device_attribute *attr, 483 const char *buf, size_t count) 484 { 485 struct sensor_device_attribute_2 *sensor_attr = 486 to_sensor_dev_attr_2(attr); 487 int index = sensor_attr->index; 488 struct i2c_client *client = to_i2c_client(dev); 489 struct w83793_data *data = i2c_get_clientdata(client); 490 unsigned long val; 491 int err; 492 493 err = kstrtoul(buf, 10, &val); 494 if (err) 495 return err; 496 val = FAN_TO_REG(val); 497 498 mutex_lock(&data->update_lock); 499 data->fan_min[index] = val; 500 w83793_write_value(client, W83793_REG_FAN_MIN(index), 501 (val >> 8) & 0xff); 502 w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff); 503 mutex_unlock(&data->update_lock); 504 505 return count; 506 } 507 508 static ssize_t 509 show_pwm(struct device *dev, struct device_attribute *attr, char *buf) 510 { 511 struct sensor_device_attribute_2 *sensor_attr = 512 to_sensor_dev_attr_2(attr); 513 struct w83793_data *data = w83793_update_device(dev); 514 u16 val; 515 int nr = sensor_attr->nr; 516 int index = sensor_attr->index; 517 518 if (nr == PWM_STOP_TIME) 519 val = TIME_FROM_REG(data->pwm_stop_time[index]); 520 else 521 val = (data->pwm[index][nr] & 0x3f) << 2; 522 523 return sprintf(buf, "%d\n", val); 524 } 525 526 static ssize_t 527 store_pwm(struct device *dev, struct device_attribute *attr, 528 const char *buf, size_t count) 529 { 530 struct i2c_client *client = to_i2c_client(dev); 531 struct w83793_data *data = i2c_get_clientdata(client); 532 struct sensor_device_attribute_2 *sensor_attr = 533 to_sensor_dev_attr_2(attr); 534 int nr = sensor_attr->nr; 535 int index = sensor_attr->index; 536 unsigned long val; 537 int err; 538 539 err = kstrtoul(buf, 10, &val); 540 if (err) 541 return err; 542 543 mutex_lock(&data->update_lock); 544 if (nr == PWM_STOP_TIME) { 545 val = TIME_TO_REG(val); 546 data->pwm_stop_time[index] = val; 547 w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index), 548 val); 549 } else { 550 val = clamp_val(val, 0, 0xff) >> 2; 551 data->pwm[index][nr] = 552 w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0; 553 data->pwm[index][nr] |= val; 554 w83793_write_value(client, W83793_REG_PWM(index, nr), 555 data->pwm[index][nr]); 556 } 557 558 mutex_unlock(&data->update_lock); 559 return count; 560 } 561 562 static ssize_t 563 show_temp(struct device *dev, struct device_attribute *attr, char *buf) 564 { 565 struct sensor_device_attribute_2 *sensor_attr = 566 to_sensor_dev_attr_2(attr); 567 int nr = sensor_attr->nr; 568 int index = sensor_attr->index; 569 struct w83793_data *data = w83793_update_device(dev); 570 long temp = TEMP_FROM_REG(data->temp[index][nr]); 571 572 if (nr == TEMP_READ && index < 4) { /* Only TD1-TD4 have low bits */ 573 int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250; 574 temp += temp > 0 ? low : -low; 575 } 576 return sprintf(buf, "%ld\n", temp); 577 } 578 579 static ssize_t 580 store_temp(struct device *dev, struct device_attribute *attr, 581 const char *buf, size_t count) 582 { 583 struct sensor_device_attribute_2 *sensor_attr = 584 to_sensor_dev_attr_2(attr); 585 int nr = sensor_attr->nr; 586 int index = sensor_attr->index; 587 struct i2c_client *client = to_i2c_client(dev); 588 struct w83793_data *data = i2c_get_clientdata(client); 589 long tmp; 590 int err; 591 592 err = kstrtol(buf, 10, &tmp); 593 if (err) 594 return err; 595 596 mutex_lock(&data->update_lock); 597 data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127); 598 w83793_write_value(client, W83793_REG_TEMP[index][nr], 599 data->temp[index][nr]); 600 mutex_unlock(&data->update_lock); 601 return count; 602 } 603 604 /* 605 * TD1-TD4 606 * each has 4 mode:(2 bits) 607 * 0: Stop monitor 608 * 1: Use internal temp sensor(default) 609 * 2: Reserved 610 * 3: Use sensor in Intel CPU and get result by PECI 611 * 612 * TR1-TR2 613 * each has 2 mode:(1 bit) 614 * 0: Disable temp sensor monitor 615 * 1: To enable temp sensors monitor 616 */ 617 618 /* 0 disable, 6 PECI */ 619 static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 }; 620 621 static ssize_t 622 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf) 623 { 624 struct w83793_data *data = w83793_update_device(dev); 625 struct sensor_device_attribute_2 *sensor_attr = 626 to_sensor_dev_attr_2(attr); 627 int index = sensor_attr->index; 628 u8 mask = (index < 4) ? 0x03 : 0x01; 629 u8 shift = (index < 4) ? (2 * index) : (index - 4); 630 u8 tmp; 631 index = (index < 4) ? 0 : 1; 632 633 tmp = (data->temp_mode[index] >> shift) & mask; 634 635 /* for the internal sensor, found out if diode or thermistor */ 636 if (tmp == 1) 637 tmp = index == 0 ? 3 : 4; 638 else 639 tmp = TO_TEMP_MODE[tmp]; 640 641 return sprintf(buf, "%d\n", tmp); 642 } 643 644 static ssize_t 645 store_temp_mode(struct device *dev, struct device_attribute *attr, 646 const char *buf, size_t count) 647 { 648 struct i2c_client *client = to_i2c_client(dev); 649 struct w83793_data *data = i2c_get_clientdata(client); 650 struct sensor_device_attribute_2 *sensor_attr = 651 to_sensor_dev_attr_2(attr); 652 int index = sensor_attr->index; 653 u8 mask = (index < 4) ? 0x03 : 0x01; 654 u8 shift = (index < 4) ? (2 * index) : (index - 4); 655 unsigned long val; 656 int err; 657 658 err = kstrtoul(buf, 10, &val); 659 if (err) 660 return err; 661 662 /* transform the sysfs interface values into table above */ 663 if ((val == 6) && (index < 4)) { 664 val -= 3; 665 } else if ((val == 3 && index < 4) 666 || (val == 4 && index >= 4)) { 667 /* transform diode or thermistor into internal enable */ 668 val = !!val; 669 } else { 670 return -EINVAL; 671 } 672 673 index = (index < 4) ? 0 : 1; 674 mutex_lock(&data->update_lock); 675 data->temp_mode[index] = 676 w83793_read_value(client, W83793_REG_TEMP_MODE[index]); 677 data->temp_mode[index] &= ~(mask << shift); 678 data->temp_mode[index] |= val << shift; 679 w83793_write_value(client, W83793_REG_TEMP_MODE[index], 680 data->temp_mode[index]); 681 mutex_unlock(&data->update_lock); 682 683 return count; 684 } 685 686 #define SETUP_PWM_DEFAULT 0 687 #define SETUP_PWM_UPTIME 1 /* Unit in 0.1s */ 688 #define SETUP_PWM_DOWNTIME 2 /* Unit in 0.1s */ 689 #define SETUP_TEMP_CRITICAL 3 690 static ssize_t 691 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf) 692 { 693 struct sensor_device_attribute_2 *sensor_attr = 694 to_sensor_dev_attr_2(attr); 695 int nr = sensor_attr->nr; 696 struct w83793_data *data = w83793_update_device(dev); 697 u32 val = 0; 698 699 if (nr == SETUP_PWM_DEFAULT) 700 val = (data->pwm_default & 0x3f) << 2; 701 else if (nr == SETUP_PWM_UPTIME) 702 val = TIME_FROM_REG(data->pwm_uptime); 703 else if (nr == SETUP_PWM_DOWNTIME) 704 val = TIME_FROM_REG(data->pwm_downtime); 705 else if (nr == SETUP_TEMP_CRITICAL) 706 val = TEMP_FROM_REG(data->temp_critical & 0x7f); 707 708 return sprintf(buf, "%d\n", val); 709 } 710 711 static ssize_t 712 store_sf_setup(struct device *dev, struct device_attribute *attr, 713 const char *buf, size_t count) 714 { 715 struct sensor_device_attribute_2 *sensor_attr = 716 to_sensor_dev_attr_2(attr); 717 int nr = sensor_attr->nr; 718 struct i2c_client *client = to_i2c_client(dev); 719 struct w83793_data *data = i2c_get_clientdata(client); 720 long val; 721 int err; 722 723 err = kstrtol(buf, 10, &val); 724 if (err) 725 return err; 726 727 mutex_lock(&data->update_lock); 728 if (nr == SETUP_PWM_DEFAULT) { 729 data->pwm_default = 730 w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0; 731 data->pwm_default |= clamp_val(val, 0, 0xff) >> 2; 732 w83793_write_value(client, W83793_REG_PWM_DEFAULT, 733 data->pwm_default); 734 } else if (nr == SETUP_PWM_UPTIME) { 735 data->pwm_uptime = TIME_TO_REG(val); 736 data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0; 737 w83793_write_value(client, W83793_REG_PWM_UPTIME, 738 data->pwm_uptime); 739 } else if (nr == SETUP_PWM_DOWNTIME) { 740 data->pwm_downtime = TIME_TO_REG(val); 741 data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0; 742 w83793_write_value(client, W83793_REG_PWM_DOWNTIME, 743 data->pwm_downtime); 744 } else { /* SETUP_TEMP_CRITICAL */ 745 data->temp_critical = 746 w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80; 747 data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f); 748 w83793_write_value(client, W83793_REG_TEMP_CRITICAL, 749 data->temp_critical); 750 } 751 752 mutex_unlock(&data->update_lock); 753 return count; 754 } 755 756 /* 757 * Temp SmartFan control 758 * TEMP_FAN_MAP 759 * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1... 760 * It's possible two or more temp channels control the same fan, w83793 761 * always prefers to pick the most critical request and applies it to 762 * the related Fan. 763 * It's possible one fan is not in any mapping of 6 temp channels, this 764 * means the fan is manual mode 765 * 766 * TEMP_PWM_ENABLE 767 * Each temp channel has its own SmartFan mode, and temp channel 768 * control fans that are set by TEMP_FAN_MAP 769 * 0: SmartFanII mode 770 * 1: Thermal Cruise Mode 771 * 772 * TEMP_CRUISE 773 * Target temperature in thermal cruise mode, w83793 will try to turn 774 * fan speed to keep the temperature of target device around this 775 * temperature. 776 * 777 * TEMP_TOLERANCE 778 * If Temp higher or lower than target with this tolerance, w83793 779 * will take actions to speed up or slow down the fan to keep the 780 * temperature within the tolerance range. 781 */ 782 783 #define TEMP_FAN_MAP 0 784 #define TEMP_PWM_ENABLE 1 785 #define TEMP_CRUISE 2 786 #define TEMP_TOLERANCE 3 787 static ssize_t 788 show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf) 789 { 790 struct sensor_device_attribute_2 *sensor_attr = 791 to_sensor_dev_attr_2(attr); 792 int nr = sensor_attr->nr; 793 int index = sensor_attr->index; 794 struct w83793_data *data = w83793_update_device(dev); 795 u32 val; 796 797 if (nr == TEMP_FAN_MAP) { 798 val = data->temp_fan_map[index]; 799 } else if (nr == TEMP_PWM_ENABLE) { 800 /* +2 to transform into 2 and 3 to conform with sysfs intf */ 801 val = ((data->pwm_enable >> index) & 0x01) + 2; 802 } else if (nr == TEMP_CRUISE) { 803 val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f); 804 } else { /* TEMP_TOLERANCE */ 805 val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0); 806 val = TEMP_FROM_REG(val & 0x0f); 807 } 808 return sprintf(buf, "%d\n", val); 809 } 810 811 static ssize_t 812 store_sf_ctrl(struct device *dev, struct device_attribute *attr, 813 const char *buf, size_t count) 814 { 815 struct sensor_device_attribute_2 *sensor_attr = 816 to_sensor_dev_attr_2(attr); 817 int nr = sensor_attr->nr; 818 int index = sensor_attr->index; 819 struct i2c_client *client = to_i2c_client(dev); 820 struct w83793_data *data = i2c_get_clientdata(client); 821 long val; 822 int err; 823 824 err = kstrtol(buf, 10, &val); 825 if (err) 826 return err; 827 828 mutex_lock(&data->update_lock); 829 if (nr == TEMP_FAN_MAP) { 830 val = clamp_val(val, 0, 255); 831 w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val); 832 data->temp_fan_map[index] = val; 833 } else if (nr == TEMP_PWM_ENABLE) { 834 if (val == 2 || val == 3) { 835 data->pwm_enable = 836 w83793_read_value(client, W83793_REG_PWM_ENABLE); 837 if (val - 2) 838 data->pwm_enable |= 1 << index; 839 else 840 data->pwm_enable &= ~(1 << index); 841 w83793_write_value(client, W83793_REG_PWM_ENABLE, 842 data->pwm_enable); 843 } else { 844 mutex_unlock(&data->update_lock); 845 return -EINVAL; 846 } 847 } else if (nr == TEMP_CRUISE) { 848 data->temp_cruise[index] = 849 w83793_read_value(client, W83793_REG_TEMP_CRUISE(index)); 850 data->temp_cruise[index] &= 0x80; 851 data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f); 852 853 w83793_write_value(client, W83793_REG_TEMP_CRUISE(index), 854 data->temp_cruise[index]); 855 } else { /* TEMP_TOLERANCE */ 856 int i = index >> 1; 857 u8 shift = (index & 0x01) ? 4 : 0; 858 data->tolerance[i] = 859 w83793_read_value(client, W83793_REG_TEMP_TOL(i)); 860 861 data->tolerance[i] &= ~(0x0f << shift); 862 data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift; 863 w83793_write_value(client, W83793_REG_TEMP_TOL(i), 864 data->tolerance[i]); 865 } 866 867 mutex_unlock(&data->update_lock); 868 return count; 869 } 870 871 static ssize_t 872 show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf) 873 { 874 struct sensor_device_attribute_2 *sensor_attr = 875 to_sensor_dev_attr_2(attr); 876 int nr = sensor_attr->nr; 877 int index = sensor_attr->index; 878 struct w83793_data *data = w83793_update_device(dev); 879 880 return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2); 881 } 882 883 static ssize_t 884 store_sf2_pwm(struct device *dev, struct device_attribute *attr, 885 const char *buf, size_t count) 886 { 887 struct i2c_client *client = to_i2c_client(dev); 888 struct w83793_data *data = i2c_get_clientdata(client); 889 struct sensor_device_attribute_2 *sensor_attr = 890 to_sensor_dev_attr_2(attr); 891 int nr = sensor_attr->nr; 892 int index = sensor_attr->index; 893 unsigned long val; 894 int err; 895 896 err = kstrtoul(buf, 10, &val); 897 if (err) 898 return err; 899 val = clamp_val(val, 0, 0xff) >> 2; 900 901 mutex_lock(&data->update_lock); 902 data->sf2_pwm[index][nr] = 903 w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0; 904 data->sf2_pwm[index][nr] |= val; 905 w83793_write_value(client, W83793_REG_SF2_PWM(index, nr), 906 data->sf2_pwm[index][nr]); 907 mutex_unlock(&data->update_lock); 908 return count; 909 } 910 911 static ssize_t 912 show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf) 913 { 914 struct sensor_device_attribute_2 *sensor_attr = 915 to_sensor_dev_attr_2(attr); 916 int nr = sensor_attr->nr; 917 int index = sensor_attr->index; 918 struct w83793_data *data = w83793_update_device(dev); 919 920 return sprintf(buf, "%ld\n", 921 TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f)); 922 } 923 924 static ssize_t 925 store_sf2_temp(struct device *dev, struct device_attribute *attr, 926 const char *buf, size_t count) 927 { 928 struct i2c_client *client = to_i2c_client(dev); 929 struct w83793_data *data = i2c_get_clientdata(client); 930 struct sensor_device_attribute_2 *sensor_attr = 931 to_sensor_dev_attr_2(attr); 932 int nr = sensor_attr->nr; 933 int index = sensor_attr->index; 934 long val; 935 int err; 936 937 err = kstrtol(buf, 10, &val); 938 if (err) 939 return err; 940 val = TEMP_TO_REG(val, 0, 0x7f); 941 942 mutex_lock(&data->update_lock); 943 data->sf2_temp[index][nr] = 944 w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80; 945 data->sf2_temp[index][nr] |= val; 946 w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr), 947 data->sf2_temp[index][nr]); 948 mutex_unlock(&data->update_lock); 949 return count; 950 } 951 952 /* only Vcore A/B and Vtt have additional 2 bits precision */ 953 static ssize_t 954 show_in(struct device *dev, struct device_attribute *attr, char *buf) 955 { 956 struct sensor_device_attribute_2 *sensor_attr = 957 to_sensor_dev_attr_2(attr); 958 int nr = sensor_attr->nr; 959 int index = sensor_attr->index; 960 struct w83793_data *data = w83793_update_device(dev); 961 u16 val = data->in[index][nr]; 962 963 if (index < 3) { 964 val <<= 2; 965 val += (data->in_low_bits[nr] >> (index * 2)) & 0x3; 966 } 967 /* voltage inputs 5VDD and 5VSB needs 150mV offset */ 968 val = val * scale_in[index] + scale_in_add[index]; 969 return sprintf(buf, "%d\n", val); 970 } 971 972 static ssize_t 973 store_in(struct device *dev, struct device_attribute *attr, 974 const char *buf, size_t count) 975 { 976 struct sensor_device_attribute_2 *sensor_attr = 977 to_sensor_dev_attr_2(attr); 978 int nr = sensor_attr->nr; 979 int index = sensor_attr->index; 980 struct i2c_client *client = to_i2c_client(dev); 981 struct w83793_data *data = i2c_get_clientdata(client); 982 unsigned long val; 983 int err; 984 985 err = kstrtoul(buf, 10, &val); 986 if (err) 987 return err; 988 val = (val + scale_in[index] / 2) / scale_in[index]; 989 990 mutex_lock(&data->update_lock); 991 if (index > 2) { 992 /* fix the limit values of 5VDD and 5VSB to ALARM mechanism */ 993 if (nr == 1 || nr == 2) 994 val -= scale_in_add[index] / scale_in[index]; 995 val = clamp_val(val, 0, 255); 996 } else { 997 val = clamp_val(val, 0, 0x3FF); 998 data->in_low_bits[nr] = 999 w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]); 1000 data->in_low_bits[nr] &= ~(0x03 << (2 * index)); 1001 data->in_low_bits[nr] |= (val & 0x03) << (2 * index); 1002 w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr], 1003 data->in_low_bits[nr]); 1004 val >>= 2; 1005 } 1006 data->in[index][nr] = val; 1007 w83793_write_value(client, W83793_REG_IN[index][nr], 1008 data->in[index][nr]); 1009 mutex_unlock(&data->update_lock); 1010 return count; 1011 } 1012 1013 #define NOT_USED -1 1014 1015 #define SENSOR_ATTR_IN(index) \ 1016 SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL, \ 1017 IN_READ, index), \ 1018 SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in, \ 1019 store_in, IN_MAX, index), \ 1020 SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in, \ 1021 store_in, IN_LOW, index), \ 1022 SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep, \ 1023 NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)), \ 1024 SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO, \ 1025 show_alarm_beep, store_beep, BEEP_ENABLE, \ 1026 index + ((index > 2) ? 1 : 0)) 1027 1028 #define SENSOR_ATTR_FAN(index) \ 1029 SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep, \ 1030 NULL, ALARM_STATUS, index + 17), \ 1031 SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO, \ 1032 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17), \ 1033 SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan, \ 1034 NULL, FAN_INPUT, index - 1), \ 1035 SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO, \ 1036 show_fan, store_fan_min, FAN_MIN, index - 1) 1037 1038 #define SENSOR_ATTR_PWM(index) \ 1039 SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm, \ 1040 store_pwm, PWM_DUTY, index - 1), \ 1041 SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO, \ 1042 show_pwm, store_pwm, PWM_NONSTOP, index - 1), \ 1043 SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO, \ 1044 show_pwm, store_pwm, PWM_START, index - 1), \ 1045 SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO, \ 1046 show_pwm, store_pwm, PWM_STOP_TIME, index - 1) 1047 1048 #define SENSOR_ATTR_TEMP(index) \ 1049 SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR, \ 1050 show_temp_mode, store_temp_mode, NOT_USED, index - 1), \ 1051 SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp, \ 1052 NULL, TEMP_READ, index - 1), \ 1053 SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp, \ 1054 store_temp, TEMP_CRIT, index - 1), \ 1055 SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR, \ 1056 show_temp, store_temp, TEMP_CRIT_HYST, index - 1), \ 1057 SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \ 1058 store_temp, TEMP_WARN, index - 1), \ 1059 SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR, \ 1060 show_temp, store_temp, TEMP_WARN_HYST, index - 1), \ 1061 SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO, \ 1062 show_alarm_beep, NULL, ALARM_STATUS, index + 11), \ 1063 SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO, \ 1064 show_alarm_beep, store_beep, BEEP_ENABLE, index + 11), \ 1065 SENSOR_ATTR_2(temp##index##_auto_channels_pwm, \ 1066 S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl, \ 1067 TEMP_FAN_MAP, index - 1), \ 1068 SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO, \ 1069 show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE, \ 1070 index - 1), \ 1071 SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR, \ 1072 show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1), \ 1073 SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\ 1074 store_sf_ctrl, TEMP_TOLERANCE, index - 1), \ 1075 SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \ 1076 show_sf2_pwm, store_sf2_pwm, 0, index - 1), \ 1077 SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \ 1078 show_sf2_pwm, store_sf2_pwm, 1, index - 1), \ 1079 SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \ 1080 show_sf2_pwm, store_sf2_pwm, 2, index - 1), \ 1081 SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \ 1082 show_sf2_pwm, store_sf2_pwm, 3, index - 1), \ 1083 SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \ 1084 show_sf2_pwm, store_sf2_pwm, 4, index - 1), \ 1085 SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \ 1086 show_sf2_pwm, store_sf2_pwm, 5, index - 1), \ 1087 SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \ 1088 show_sf2_pwm, store_sf2_pwm, 6, index - 1), \ 1089 SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\ 1090 show_sf2_temp, store_sf2_temp, 0, index - 1), \ 1091 SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\ 1092 show_sf2_temp, store_sf2_temp, 1, index - 1), \ 1093 SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\ 1094 show_sf2_temp, store_sf2_temp, 2, index - 1), \ 1095 SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\ 1096 show_sf2_temp, store_sf2_temp, 3, index - 1), \ 1097 SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\ 1098 show_sf2_temp, store_sf2_temp, 4, index - 1), \ 1099 SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\ 1100 show_sf2_temp, store_sf2_temp, 5, index - 1), \ 1101 SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\ 1102 show_sf2_temp, store_sf2_temp, 6, index - 1) 1103 1104 static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = { 1105 SENSOR_ATTR_IN(0), 1106 SENSOR_ATTR_IN(1), 1107 SENSOR_ATTR_IN(2), 1108 SENSOR_ATTR_IN(3), 1109 SENSOR_ATTR_IN(4), 1110 SENSOR_ATTR_IN(5), 1111 SENSOR_ATTR_IN(6), 1112 SENSOR_ATTR_IN(7), 1113 SENSOR_ATTR_IN(8), 1114 SENSOR_ATTR_IN(9), 1115 SENSOR_ATTR_FAN(1), 1116 SENSOR_ATTR_FAN(2), 1117 SENSOR_ATTR_FAN(3), 1118 SENSOR_ATTR_FAN(4), 1119 SENSOR_ATTR_FAN(5), 1120 SENSOR_ATTR_PWM(1), 1121 SENSOR_ATTR_PWM(2), 1122 SENSOR_ATTR_PWM(3), 1123 }; 1124 1125 static struct sensor_device_attribute_2 w83793_temp[] = { 1126 SENSOR_ATTR_TEMP(1), 1127 SENSOR_ATTR_TEMP(2), 1128 SENSOR_ATTR_TEMP(3), 1129 SENSOR_ATTR_TEMP(4), 1130 SENSOR_ATTR_TEMP(5), 1131 SENSOR_ATTR_TEMP(6), 1132 }; 1133 1134 /* Fan6-Fan12 */ 1135 static struct sensor_device_attribute_2 w83793_left_fan[] = { 1136 SENSOR_ATTR_FAN(6), 1137 SENSOR_ATTR_FAN(7), 1138 SENSOR_ATTR_FAN(8), 1139 SENSOR_ATTR_FAN(9), 1140 SENSOR_ATTR_FAN(10), 1141 SENSOR_ATTR_FAN(11), 1142 SENSOR_ATTR_FAN(12), 1143 }; 1144 1145 /* Pwm4-Pwm8 */ 1146 static struct sensor_device_attribute_2 w83793_left_pwm[] = { 1147 SENSOR_ATTR_PWM(4), 1148 SENSOR_ATTR_PWM(5), 1149 SENSOR_ATTR_PWM(6), 1150 SENSOR_ATTR_PWM(7), 1151 SENSOR_ATTR_PWM(8), 1152 }; 1153 1154 static struct sensor_device_attribute_2 w83793_vid[] = { 1155 SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0), 1156 SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1), 1157 }; 1158 static DEVICE_ATTR_RW(vrm); 1159 1160 static struct sensor_device_attribute_2 sda_single_files[] = { 1161 SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep, 1162 store_chassis_clear, ALARM_STATUS, 30), 1163 SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable, 1164 store_beep_enable, NOT_USED, NOT_USED), 1165 SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup, 1166 store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED), 1167 SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup, 1168 store_sf_setup, SETUP_PWM_UPTIME, NOT_USED), 1169 SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup, 1170 store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED), 1171 SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup, 1172 store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED), 1173 }; 1174 1175 static void w83793_init_client(struct i2c_client *client) 1176 { 1177 if (reset) 1178 w83793_write_value(client, W83793_REG_CONFIG, 0x80); 1179 1180 /* Start monitoring */ 1181 w83793_write_value(client, W83793_REG_CONFIG, 1182 w83793_read_value(client, W83793_REG_CONFIG) | 0x01); 1183 } 1184 1185 /* 1186 * Watchdog routines 1187 */ 1188 1189 static int watchdog_set_timeout(struct w83793_data *data, int timeout) 1190 { 1191 unsigned int mtimeout; 1192 int ret; 1193 1194 mtimeout = DIV_ROUND_UP(timeout, 60); 1195 1196 if (mtimeout > 255) 1197 return -EINVAL; 1198 1199 mutex_lock(&data->watchdog_lock); 1200 if (!data->client) { 1201 ret = -ENODEV; 1202 goto leave; 1203 } 1204 1205 data->watchdog_timeout = mtimeout; 1206 1207 /* Set Timeout value (in Minutes) */ 1208 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT, 1209 data->watchdog_timeout); 1210 1211 ret = mtimeout * 60; 1212 1213 leave: 1214 mutex_unlock(&data->watchdog_lock); 1215 return ret; 1216 } 1217 1218 static int watchdog_get_timeout(struct w83793_data *data) 1219 { 1220 int timeout; 1221 1222 mutex_lock(&data->watchdog_lock); 1223 timeout = data->watchdog_timeout * 60; 1224 mutex_unlock(&data->watchdog_lock); 1225 1226 return timeout; 1227 } 1228 1229 static int watchdog_trigger(struct w83793_data *data) 1230 { 1231 int ret = 0; 1232 1233 mutex_lock(&data->watchdog_lock); 1234 if (!data->client) { 1235 ret = -ENODEV; 1236 goto leave; 1237 } 1238 1239 /* Set Timeout value (in Minutes) */ 1240 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT, 1241 data->watchdog_timeout); 1242 1243 leave: 1244 mutex_unlock(&data->watchdog_lock); 1245 return ret; 1246 } 1247 1248 static int watchdog_enable(struct w83793_data *data) 1249 { 1250 int ret = 0; 1251 1252 mutex_lock(&data->watchdog_lock); 1253 if (!data->client) { 1254 ret = -ENODEV; 1255 goto leave; 1256 } 1257 1258 /* Set initial timeout */ 1259 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT, 1260 data->watchdog_timeout); 1261 1262 /* Enable Soft Watchdog */ 1263 w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55); 1264 1265 leave: 1266 mutex_unlock(&data->watchdog_lock); 1267 return ret; 1268 } 1269 1270 static int watchdog_disable(struct w83793_data *data) 1271 { 1272 int ret = 0; 1273 1274 mutex_lock(&data->watchdog_lock); 1275 if (!data->client) { 1276 ret = -ENODEV; 1277 goto leave; 1278 } 1279 1280 /* Disable Soft Watchdog */ 1281 w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA); 1282 1283 leave: 1284 mutex_unlock(&data->watchdog_lock); 1285 return ret; 1286 } 1287 1288 static int watchdog_open(struct inode *inode, struct file *filp) 1289 { 1290 struct w83793_data *pos, *data = NULL; 1291 int watchdog_is_open; 1292 1293 /* 1294 * We get called from drivers/char/misc.c with misc_mtx hold, and we 1295 * call misc_register() from w83793_probe() with watchdog_data_mutex 1296 * hold, as misc_register() takes the misc_mtx lock, this is a possible 1297 * deadlock, so we use mutex_trylock here. 1298 */ 1299 if (!mutex_trylock(&watchdog_data_mutex)) 1300 return -ERESTARTSYS; 1301 list_for_each_entry(pos, &watchdog_data_list, list) { 1302 if (pos->watchdog_miscdev.minor == iminor(inode)) { 1303 data = pos; 1304 break; 1305 } 1306 } 1307 1308 /* Check, if device is already open */ 1309 watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open); 1310 1311 /* 1312 * Increase data reference counter (if not already done). 1313 * Note we can never not have found data, so we don't check for this 1314 */ 1315 if (!watchdog_is_open) 1316 kref_get(&data->kref); 1317 1318 mutex_unlock(&watchdog_data_mutex); 1319 1320 /* Check, if device is already open and possibly issue error */ 1321 if (watchdog_is_open) 1322 return -EBUSY; 1323 1324 /* Enable Soft Watchdog */ 1325 watchdog_enable(data); 1326 1327 /* Store pointer to data into filp's private data */ 1328 filp->private_data = data; 1329 1330 return stream_open(inode, filp); 1331 } 1332 1333 static int watchdog_close(struct inode *inode, struct file *filp) 1334 { 1335 struct w83793_data *data = filp->private_data; 1336 1337 if (data->watchdog_expect_close) { 1338 watchdog_disable(data); 1339 data->watchdog_expect_close = 0; 1340 } else { 1341 watchdog_trigger(data); 1342 dev_crit(&data->client->dev, 1343 "unexpected close, not stopping watchdog!\n"); 1344 } 1345 1346 clear_bit(0, &data->watchdog_is_open); 1347 1348 /* Decrease data reference counter */ 1349 mutex_lock(&watchdog_data_mutex); 1350 kref_put(&data->kref, w83793_release_resources); 1351 mutex_unlock(&watchdog_data_mutex); 1352 1353 return 0; 1354 } 1355 1356 static ssize_t watchdog_write(struct file *filp, const char __user *buf, 1357 size_t count, loff_t *offset) 1358 { 1359 ssize_t ret; 1360 struct w83793_data *data = filp->private_data; 1361 1362 if (count) { 1363 if (!nowayout) { 1364 size_t i; 1365 1366 /* Clear it in case it was set with a previous write */ 1367 data->watchdog_expect_close = 0; 1368 1369 for (i = 0; i != count; i++) { 1370 char c; 1371 if (get_user(c, buf + i)) 1372 return -EFAULT; 1373 if (c == 'V') 1374 data->watchdog_expect_close = 1; 1375 } 1376 } 1377 ret = watchdog_trigger(data); 1378 if (ret < 0) 1379 return ret; 1380 } 1381 return count; 1382 } 1383 1384 static long watchdog_ioctl(struct file *filp, unsigned int cmd, 1385 unsigned long arg) 1386 { 1387 struct watchdog_info ident = { 1388 .options = WDIOF_KEEPALIVEPING | 1389 WDIOF_SETTIMEOUT | 1390 WDIOF_CARDRESET, 1391 .identity = "w83793 watchdog" 1392 }; 1393 1394 int val, ret = 0; 1395 struct w83793_data *data = filp->private_data; 1396 1397 switch (cmd) { 1398 case WDIOC_GETSUPPORT: 1399 if (!nowayout) 1400 ident.options |= WDIOF_MAGICCLOSE; 1401 if (copy_to_user((void __user *)arg, &ident, sizeof(ident))) 1402 ret = -EFAULT; 1403 break; 1404 1405 case WDIOC_GETSTATUS: 1406 val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0; 1407 ret = put_user(val, (int __user *)arg); 1408 break; 1409 1410 case WDIOC_GETBOOTSTATUS: 1411 ret = put_user(0, (int __user *)arg); 1412 break; 1413 1414 case WDIOC_KEEPALIVE: 1415 ret = watchdog_trigger(data); 1416 break; 1417 1418 case WDIOC_GETTIMEOUT: 1419 val = watchdog_get_timeout(data); 1420 ret = put_user(val, (int __user *)arg); 1421 break; 1422 1423 case WDIOC_SETTIMEOUT: 1424 if (get_user(val, (int __user *)arg)) { 1425 ret = -EFAULT; 1426 break; 1427 } 1428 ret = watchdog_set_timeout(data, val); 1429 if (ret > 0) 1430 ret = put_user(ret, (int __user *)arg); 1431 break; 1432 1433 case WDIOC_SETOPTIONS: 1434 if (get_user(val, (int __user *)arg)) { 1435 ret = -EFAULT; 1436 break; 1437 } 1438 1439 if (val & WDIOS_DISABLECARD) 1440 ret = watchdog_disable(data); 1441 else if (val & WDIOS_ENABLECARD) 1442 ret = watchdog_enable(data); 1443 else 1444 ret = -EINVAL; 1445 1446 break; 1447 default: 1448 ret = -ENOTTY; 1449 } 1450 return ret; 1451 } 1452 1453 static const struct file_operations watchdog_fops = { 1454 .owner = THIS_MODULE, 1455 .open = watchdog_open, 1456 .release = watchdog_close, 1457 .write = watchdog_write, 1458 .unlocked_ioctl = watchdog_ioctl, 1459 .compat_ioctl = compat_ptr_ioctl, 1460 }; 1461 1462 /* 1463 * Notifier for system down 1464 */ 1465 1466 static int watchdog_notify_sys(struct notifier_block *this, unsigned long code, 1467 void *unused) 1468 { 1469 struct w83793_data *data = NULL; 1470 1471 if (code == SYS_DOWN || code == SYS_HALT) { 1472 1473 /* Disable each registered watchdog */ 1474 mutex_lock(&watchdog_data_mutex); 1475 list_for_each_entry(data, &watchdog_data_list, list) { 1476 if (data->watchdog_miscdev.minor) 1477 watchdog_disable(data); 1478 } 1479 mutex_unlock(&watchdog_data_mutex); 1480 } 1481 1482 return NOTIFY_DONE; 1483 } 1484 1485 /* 1486 * The WDT needs to learn about soft shutdowns in order to 1487 * turn the timebomb registers off. 1488 */ 1489 1490 static struct notifier_block watchdog_notifier = { 1491 .notifier_call = watchdog_notify_sys, 1492 }; 1493 1494 /* 1495 * Init / remove routines 1496 */ 1497 1498 static void w83793_remove(struct i2c_client *client) 1499 { 1500 struct w83793_data *data = i2c_get_clientdata(client); 1501 struct device *dev = &client->dev; 1502 int i, tmp; 1503 1504 /* Unregister the watchdog (if registered) */ 1505 if (data->watchdog_miscdev.minor) { 1506 misc_deregister(&data->watchdog_miscdev); 1507 1508 if (data->watchdog_is_open) { 1509 dev_warn(&client->dev, 1510 "i2c client detached with watchdog open! " 1511 "Stopping watchdog.\n"); 1512 watchdog_disable(data); 1513 } 1514 1515 mutex_lock(&watchdog_data_mutex); 1516 list_del(&data->list); 1517 mutex_unlock(&watchdog_data_mutex); 1518 1519 /* Tell the watchdog code the client is gone */ 1520 mutex_lock(&data->watchdog_lock); 1521 data->client = NULL; 1522 mutex_unlock(&data->watchdog_lock); 1523 } 1524 1525 /* Reset Configuration Register to Disable Watch Dog Registers */ 1526 tmp = w83793_read_value(client, W83793_REG_CONFIG); 1527 w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04); 1528 1529 unregister_reboot_notifier(&watchdog_notifier); 1530 1531 hwmon_device_unregister(data->hwmon_dev); 1532 1533 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) 1534 device_remove_file(dev, 1535 &w83793_sensor_attr_2[i].dev_attr); 1536 1537 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) 1538 device_remove_file(dev, &sda_single_files[i].dev_attr); 1539 1540 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) 1541 device_remove_file(dev, &w83793_vid[i].dev_attr); 1542 device_remove_file(dev, &dev_attr_vrm); 1543 1544 for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++) 1545 device_remove_file(dev, &w83793_left_fan[i].dev_attr); 1546 1547 for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++) 1548 device_remove_file(dev, &w83793_left_pwm[i].dev_attr); 1549 1550 for (i = 0; i < ARRAY_SIZE(w83793_temp); i++) 1551 device_remove_file(dev, &w83793_temp[i].dev_attr); 1552 1553 /* Decrease data reference counter */ 1554 mutex_lock(&watchdog_data_mutex); 1555 kref_put(&data->kref, w83793_release_resources); 1556 mutex_unlock(&watchdog_data_mutex); 1557 } 1558 1559 static int 1560 w83793_detect_subclients(struct i2c_client *client) 1561 { 1562 int i, id; 1563 int address = client->addr; 1564 u8 tmp; 1565 struct i2c_adapter *adapter = client->adapter; 1566 1567 id = i2c_adapter_id(adapter); 1568 if (force_subclients[0] == id && force_subclients[1] == address) { 1569 for (i = 2; i <= 3; i++) { 1570 if (force_subclients[i] < 0x48 1571 || force_subclients[i] > 0x4f) { 1572 dev_err(&client->dev, 1573 "invalid subclient " 1574 "address %d; must be 0x48-0x4f\n", 1575 force_subclients[i]); 1576 return -EINVAL; 1577 } 1578 } 1579 w83793_write_value(client, W83793_REG_I2C_SUBADDR, 1580 (force_subclients[2] & 0x07) | 1581 ((force_subclients[3] & 0x07) << 4)); 1582 } 1583 1584 tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR); 1585 1586 if (!(tmp & 0x88) && (tmp & 0x7) == ((tmp >> 4) & 0x7)) { 1587 dev_err(&client->dev, 1588 "duplicate addresses 0x%x, use force_subclient\n", 0x48 + (tmp & 0x7)); 1589 return -ENODEV; 1590 } 1591 1592 if (!(tmp & 0x08)) 1593 devm_i2c_new_dummy_device(&client->dev, adapter, 0x48 + (tmp & 0x7)); 1594 1595 if (!(tmp & 0x80)) 1596 devm_i2c_new_dummy_device(&client->dev, adapter, 0x48 + ((tmp >> 4) & 0x7)); 1597 1598 return 0; 1599 } 1600 1601 /* Return 0 if detection is successful, -ENODEV otherwise */ 1602 static int w83793_detect(struct i2c_client *client, 1603 struct i2c_board_info *info) 1604 { 1605 u8 tmp, bank, chip_id; 1606 struct i2c_adapter *adapter = client->adapter; 1607 unsigned short address = client->addr; 1608 1609 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 1610 return -ENODEV; 1611 1612 bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL); 1613 1614 tmp = bank & 0x80 ? 0x5c : 0xa3; 1615 /* Check Winbond vendor ID */ 1616 if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) { 1617 pr_debug("w83793: Detection failed at check vendor id\n"); 1618 return -ENODEV; 1619 } 1620 1621 /* 1622 * If Winbond chip, address of chip and W83793_REG_I2C_ADDR 1623 * should match 1624 */ 1625 if ((bank & 0x07) == 0 1626 && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) != 1627 (address << 1)) { 1628 pr_debug("w83793: Detection failed at check i2c addr\n"); 1629 return -ENODEV; 1630 } 1631 1632 /* Determine the chip type now */ 1633 chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID); 1634 if (chip_id != 0x7b) 1635 return -ENODEV; 1636 1637 strscpy(info->type, "w83793", I2C_NAME_SIZE); 1638 1639 return 0; 1640 } 1641 1642 static int w83793_probe(struct i2c_client *client) 1643 { 1644 struct device *dev = &client->dev; 1645 static const int watchdog_minors[] = { 1646 WATCHDOG_MINOR, 212, 213, 214, 215 1647 }; 1648 struct w83793_data *data; 1649 int i, tmp, val, err; 1650 int files_fan = ARRAY_SIZE(w83793_left_fan) / 7; 1651 int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5; 1652 int files_temp = ARRAY_SIZE(w83793_temp) / 6; 1653 1654 data = kzalloc_obj(struct w83793_data); 1655 if (!data) { 1656 err = -ENOMEM; 1657 goto exit; 1658 } 1659 1660 i2c_set_clientdata(client, data); 1661 data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL); 1662 mutex_init(&data->update_lock); 1663 mutex_init(&data->watchdog_lock); 1664 INIT_LIST_HEAD(&data->list); 1665 kref_init(&data->kref); 1666 1667 /* 1668 * Store client pointer in our data struct for watchdog usage 1669 * (where the client is found through a data ptr instead of the 1670 * otherway around) 1671 */ 1672 data->client = client; 1673 1674 err = w83793_detect_subclients(client); 1675 if (err) 1676 goto free_mem; 1677 1678 /* Initialize the chip */ 1679 w83793_init_client(client); 1680 1681 /* 1682 * Only fan 1-5 has their own input pins, 1683 * Pwm 1-3 has their own pins 1684 */ 1685 data->has_fan = 0x1f; 1686 data->has_pwm = 0x07; 1687 tmp = w83793_read_value(client, W83793_REG_MFC); 1688 val = w83793_read_value(client, W83793_REG_FANIN_CTRL); 1689 1690 /* check the function of pins 49-56 */ 1691 if (tmp & 0x80) { 1692 data->has_vid |= 0x2; /* has VIDB */ 1693 } else { 1694 data->has_pwm |= 0x18; /* pwm 4,5 */ 1695 if (val & 0x01) { /* fan 6 */ 1696 data->has_fan |= 0x20; 1697 data->has_pwm |= 0x20; 1698 } 1699 if (val & 0x02) { /* fan 7 */ 1700 data->has_fan |= 0x40; 1701 data->has_pwm |= 0x40; 1702 } 1703 if (!(tmp & 0x40) && (val & 0x04)) { /* fan 8 */ 1704 data->has_fan |= 0x80; 1705 data->has_pwm |= 0x80; 1706 } 1707 } 1708 1709 /* check the function of pins 37-40 */ 1710 if (!(tmp & 0x29)) 1711 data->has_vid |= 0x1; /* has VIDA */ 1712 if (0x08 == (tmp & 0x0c)) { 1713 if (val & 0x08) /* fan 9 */ 1714 data->has_fan |= 0x100; 1715 if (val & 0x10) /* fan 10 */ 1716 data->has_fan |= 0x200; 1717 } 1718 if (0x20 == (tmp & 0x30)) { 1719 if (val & 0x20) /* fan 11 */ 1720 data->has_fan |= 0x400; 1721 if (val & 0x40) /* fan 12 */ 1722 data->has_fan |= 0x800; 1723 } 1724 1725 if ((tmp & 0x01) && (val & 0x04)) { /* fan 8, second location */ 1726 data->has_fan |= 0x80; 1727 data->has_pwm |= 0x80; 1728 } 1729 1730 tmp = w83793_read_value(client, W83793_REG_FANIN_SEL); 1731 if ((tmp & 0x01) && (val & 0x08)) { /* fan 9, second location */ 1732 data->has_fan |= 0x100; 1733 } 1734 if ((tmp & 0x02) && (val & 0x10)) { /* fan 10, second location */ 1735 data->has_fan |= 0x200; 1736 } 1737 if ((tmp & 0x04) && (val & 0x20)) { /* fan 11, second location */ 1738 data->has_fan |= 0x400; 1739 } 1740 if ((tmp & 0x08) && (val & 0x40)) { /* fan 12, second location */ 1741 data->has_fan |= 0x800; 1742 } 1743 1744 /* check the temp1-6 mode, ignore former AMDSI selected inputs */ 1745 tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]); 1746 if (tmp & 0x01) 1747 data->has_temp |= 0x01; 1748 if (tmp & 0x04) 1749 data->has_temp |= 0x02; 1750 if (tmp & 0x10) 1751 data->has_temp |= 0x04; 1752 if (tmp & 0x40) 1753 data->has_temp |= 0x08; 1754 1755 tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]); 1756 if (tmp & 0x01) 1757 data->has_temp |= 0x10; 1758 if (tmp & 0x02) 1759 data->has_temp |= 0x20; 1760 1761 /* Register sysfs hooks */ 1762 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) { 1763 err = device_create_file(dev, 1764 &w83793_sensor_attr_2[i].dev_attr); 1765 if (err) 1766 goto exit_remove; 1767 } 1768 1769 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) { 1770 if (!(data->has_vid & (1 << i))) 1771 continue; 1772 err = device_create_file(dev, &w83793_vid[i].dev_attr); 1773 if (err) 1774 goto exit_remove; 1775 } 1776 if (data->has_vid) { 1777 data->vrm = vid_which_vrm(); 1778 err = device_create_file(dev, &dev_attr_vrm); 1779 if (err) 1780 goto exit_remove; 1781 } 1782 1783 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) { 1784 err = device_create_file(dev, &sda_single_files[i].dev_attr); 1785 if (err) 1786 goto exit_remove; 1787 1788 } 1789 1790 for (i = 0; i < 6; i++) { 1791 int j; 1792 if (!(data->has_temp & (1 << i))) 1793 continue; 1794 for (j = 0; j < files_temp; j++) { 1795 err = device_create_file(dev, 1796 &w83793_temp[(i) * files_temp 1797 + j].dev_attr); 1798 if (err) 1799 goto exit_remove; 1800 } 1801 } 1802 1803 for (i = 5; i < 12; i++) { 1804 int j; 1805 if (!(data->has_fan & (1 << i))) 1806 continue; 1807 for (j = 0; j < files_fan; j++) { 1808 err = device_create_file(dev, 1809 &w83793_left_fan[(i - 5) * files_fan 1810 + j].dev_attr); 1811 if (err) 1812 goto exit_remove; 1813 } 1814 } 1815 1816 for (i = 3; i < 8; i++) { 1817 int j; 1818 if (!(data->has_pwm & (1 << i))) 1819 continue; 1820 for (j = 0; j < files_pwm; j++) { 1821 err = device_create_file(dev, 1822 &w83793_left_pwm[(i - 3) * files_pwm 1823 + j].dev_attr); 1824 if (err) 1825 goto exit_remove; 1826 } 1827 } 1828 1829 data->hwmon_dev = hwmon_device_register(dev); 1830 if (IS_ERR(data->hwmon_dev)) { 1831 err = PTR_ERR(data->hwmon_dev); 1832 goto exit_remove; 1833 } 1834 1835 /* Watchdog initialization */ 1836 1837 /* Register boot notifier */ 1838 err = register_reboot_notifier(&watchdog_notifier); 1839 if (err != 0) { 1840 dev_err(&client->dev, 1841 "cannot register reboot notifier (err=%d)\n", err); 1842 goto exit_devunreg; 1843 } 1844 1845 /* 1846 * Enable Watchdog registers. 1847 * Set Configuration Register to Enable Watch Dog Registers 1848 * (Bit 2) = XXXX, X1XX. 1849 */ 1850 tmp = w83793_read_value(client, W83793_REG_CONFIG); 1851 w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04); 1852 1853 /* Set the default watchdog timeout */ 1854 data->watchdog_timeout = timeout; 1855 1856 /* Check, if last reboot was caused by watchdog */ 1857 data->watchdog_caused_reboot = 1858 w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01; 1859 1860 /* Disable Soft Watchdog during initialiation */ 1861 watchdog_disable(data); 1862 1863 /* 1864 * We take the data_mutex lock early so that watchdog_open() cannot 1865 * run when misc_register() has completed, but we've not yet added 1866 * our data to the watchdog_data_list (and set the default timeout) 1867 */ 1868 mutex_lock(&watchdog_data_mutex); 1869 for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) { 1870 /* Register our watchdog part */ 1871 snprintf(data->watchdog_name, sizeof(data->watchdog_name), 1872 "watchdog%c", (i == 0) ? '\0' : ('0' + i)); 1873 data->watchdog_miscdev.name = data->watchdog_name; 1874 data->watchdog_miscdev.fops = &watchdog_fops; 1875 data->watchdog_miscdev.minor = watchdog_minors[i]; 1876 1877 err = misc_register(&data->watchdog_miscdev); 1878 if (err == -EBUSY) 1879 continue; 1880 if (err) { 1881 data->watchdog_miscdev.minor = 0; 1882 dev_err(&client->dev, 1883 "Registering watchdog chardev: %d\n", err); 1884 break; 1885 } 1886 1887 list_add(&data->list, &watchdog_data_list); 1888 1889 dev_info(&client->dev, 1890 "Registered watchdog chardev major 10, minor: %d\n", 1891 watchdog_minors[i]); 1892 break; 1893 } 1894 if (i == ARRAY_SIZE(watchdog_minors)) { 1895 data->watchdog_miscdev.minor = 0; 1896 dev_warn(&client->dev, 1897 "Couldn't register watchdog chardev (due to no free minor)\n"); 1898 } 1899 1900 mutex_unlock(&watchdog_data_mutex); 1901 1902 return 0; 1903 1904 /* Unregister hwmon device */ 1905 1906 exit_devunreg: 1907 1908 hwmon_device_unregister(data->hwmon_dev); 1909 1910 /* Unregister sysfs hooks */ 1911 1912 exit_remove: 1913 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) 1914 device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr); 1915 1916 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) 1917 device_remove_file(dev, &sda_single_files[i].dev_attr); 1918 1919 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) 1920 device_remove_file(dev, &w83793_vid[i].dev_attr); 1921 device_remove_file(dev, &dev_attr_vrm); 1922 1923 for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++) 1924 device_remove_file(dev, &w83793_left_fan[i].dev_attr); 1925 1926 for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++) 1927 device_remove_file(dev, &w83793_left_pwm[i].dev_attr); 1928 1929 for (i = 0; i < ARRAY_SIZE(w83793_temp); i++) 1930 device_remove_file(dev, &w83793_temp[i].dev_attr); 1931 free_mem: 1932 mutex_lock(&watchdog_data_mutex); 1933 kref_put(&data->kref, w83793_release_resources); 1934 mutex_unlock(&watchdog_data_mutex); 1935 exit: 1936 return err; 1937 } 1938 1939 static void w83793_update_nonvolatile(struct device *dev) 1940 { 1941 struct i2c_client *client = to_i2c_client(dev); 1942 struct w83793_data *data = i2c_get_clientdata(client); 1943 int i, j; 1944 /* 1945 * They are somewhat "stable" registers, and to update them every time 1946 * takes so much time, it's just not worthy. Update them in a long 1947 * interval to avoid exception. 1948 */ 1949 if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300) 1950 || !data->valid)) 1951 return; 1952 /* update voltage limits */ 1953 for (i = 1; i < 3; i++) { 1954 for (j = 0; j < ARRAY_SIZE(data->in); j++) { 1955 data->in[j][i] = 1956 w83793_read_value(client, W83793_REG_IN[j][i]); 1957 } 1958 data->in_low_bits[i] = 1959 w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]); 1960 } 1961 1962 for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) { 1963 /* Update the Fan measured value and limits */ 1964 if (!(data->has_fan & (1 << i))) 1965 continue; 1966 data->fan_min[i] = 1967 w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8; 1968 data->fan_min[i] |= 1969 w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1); 1970 } 1971 1972 for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) { 1973 if (!(data->has_temp & (1 << i))) 1974 continue; 1975 data->temp_fan_map[i] = 1976 w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i)); 1977 for (j = 1; j < 5; j++) { 1978 data->temp[i][j] = 1979 w83793_read_value(client, W83793_REG_TEMP[i][j]); 1980 } 1981 data->temp_cruise[i] = 1982 w83793_read_value(client, W83793_REG_TEMP_CRUISE(i)); 1983 for (j = 0; j < 7; j++) { 1984 data->sf2_pwm[i][j] = 1985 w83793_read_value(client, W83793_REG_SF2_PWM(i, j)); 1986 data->sf2_temp[i][j] = 1987 w83793_read_value(client, 1988 W83793_REG_SF2_TEMP(i, j)); 1989 } 1990 } 1991 1992 for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++) 1993 data->temp_mode[i] = 1994 w83793_read_value(client, W83793_REG_TEMP_MODE[i]); 1995 1996 for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) { 1997 data->tolerance[i] = 1998 w83793_read_value(client, W83793_REG_TEMP_TOL(i)); 1999 } 2000 2001 for (i = 0; i < ARRAY_SIZE(data->pwm); i++) { 2002 if (!(data->has_pwm & (1 << i))) 2003 continue; 2004 data->pwm[i][PWM_NONSTOP] = 2005 w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP)); 2006 data->pwm[i][PWM_START] = 2007 w83793_read_value(client, W83793_REG_PWM(i, PWM_START)); 2008 data->pwm_stop_time[i] = 2009 w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i)); 2010 } 2011 2012 data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT); 2013 data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE); 2014 data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME); 2015 data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME); 2016 data->temp_critical = 2017 w83793_read_value(client, W83793_REG_TEMP_CRITICAL); 2018 data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP); 2019 2020 for (i = 0; i < ARRAY_SIZE(data->beeps); i++) 2021 data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i)); 2022 2023 data->last_nonvolatile = jiffies; 2024 } 2025 2026 static struct w83793_data *w83793_update_device(struct device *dev) 2027 { 2028 struct i2c_client *client = to_i2c_client(dev); 2029 struct w83793_data *data = i2c_get_clientdata(client); 2030 int i; 2031 2032 mutex_lock(&data->update_lock); 2033 2034 if (!(time_after(jiffies, data->last_updated + HZ * 2) 2035 || !data->valid)) 2036 goto END; 2037 2038 /* Update the voltages measured value and limits */ 2039 for (i = 0; i < ARRAY_SIZE(data->in); i++) 2040 data->in[i][IN_READ] = 2041 w83793_read_value(client, W83793_REG_IN[i][IN_READ]); 2042 2043 data->in_low_bits[IN_READ] = 2044 w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]); 2045 2046 for (i = 0; i < ARRAY_SIZE(data->fan); i++) { 2047 if (!(data->has_fan & (1 << i))) 2048 continue; 2049 data->fan[i] = 2050 w83793_read_value(client, W83793_REG_FAN(i)) << 8; 2051 data->fan[i] |= 2052 w83793_read_value(client, W83793_REG_FAN(i) + 1); 2053 } 2054 2055 for (i = 0; i < ARRAY_SIZE(data->temp); i++) { 2056 if (!(data->has_temp & (1 << i))) 2057 continue; 2058 data->temp[i][TEMP_READ] = 2059 w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]); 2060 } 2061 2062 data->temp_low_bits = 2063 w83793_read_value(client, W83793_REG_TEMP_LOW_BITS); 2064 2065 for (i = 0; i < ARRAY_SIZE(data->pwm); i++) { 2066 if (data->has_pwm & (1 << i)) 2067 data->pwm[i][PWM_DUTY] = 2068 w83793_read_value(client, 2069 W83793_REG_PWM(i, PWM_DUTY)); 2070 } 2071 2072 for (i = 0; i < ARRAY_SIZE(data->alarms); i++) 2073 data->alarms[i] = 2074 w83793_read_value(client, W83793_REG_ALARM(i)); 2075 if (data->has_vid & 0x01) 2076 data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA); 2077 if (data->has_vid & 0x02) 2078 data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB); 2079 w83793_update_nonvolatile(dev); 2080 data->last_updated = jiffies; 2081 data->valid = true; 2082 2083 END: 2084 mutex_unlock(&data->update_lock); 2085 return data; 2086 } 2087 2088 /* 2089 * Ignore the possibility that somebody change bank outside the driver 2090 * Must be called with data->update_lock held, except during initialization 2091 */ 2092 static u8 w83793_read_value(struct i2c_client *client, u16 reg) 2093 { 2094 struct w83793_data *data = i2c_get_clientdata(client); 2095 u8 res; 2096 u8 new_bank = reg >> 8; 2097 2098 new_bank |= data->bank & 0xfc; 2099 if (data->bank != new_bank) { 2100 if (i2c_smbus_write_byte_data 2101 (client, W83793_REG_BANKSEL, new_bank) >= 0) 2102 data->bank = new_bank; 2103 else { 2104 dev_err(&client->dev, 2105 "set bank to %d failed, fall back " 2106 "to bank %d, read reg 0x%x error\n", 2107 new_bank, data->bank, reg); 2108 res = 0x0; /* read 0x0 from the chip */ 2109 goto END; 2110 } 2111 } 2112 res = i2c_smbus_read_byte_data(client, reg & 0xff); 2113 END: 2114 return res; 2115 } 2116 2117 /* Must be called with data->update_lock held, except during initialization */ 2118 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value) 2119 { 2120 struct w83793_data *data = i2c_get_clientdata(client); 2121 int res; 2122 u8 new_bank = reg >> 8; 2123 2124 new_bank |= data->bank & 0xfc; 2125 if (data->bank != new_bank) { 2126 res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL, 2127 new_bank); 2128 if (res < 0) { 2129 dev_err(&client->dev, 2130 "set bank to %d failed, fall back " 2131 "to bank %d, write reg 0x%x error\n", 2132 new_bank, data->bank, reg); 2133 goto END; 2134 } 2135 data->bank = new_bank; 2136 } 2137 2138 res = i2c_smbus_write_byte_data(client, reg & 0xff, value); 2139 END: 2140 return res; 2141 } 2142 2143 module_i2c_driver(w83793_driver); 2144 2145 MODULE_AUTHOR("Yuan Mu, Sven Anders"); 2146 MODULE_DESCRIPTION("w83793 driver"); 2147 MODULE_LICENSE("GPL"); 2148