1 /* 2 * w83793.c - Linux kernel driver for hardware monitoring 3 * Copyright (C) 2006 Winbond Electronics Corp. 4 * Yuan Mu 5 * Rudolf Marek <r.marek@assembler.cz> 6 * Copyright (C) 2009-2010 Sven Anders <anders@anduras.de>, ANDURAS AG. 7 * Watchdog driver part 8 * (Based partially on fschmd driver, 9 * Copyright 2007-2008 by Hans de Goede) 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation - version 2. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 23 * 02110-1301 USA. 24 */ 25 26 /* 27 * Supports following chips: 28 * 29 * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA 30 * w83793 10 12 8 6 0x7b 0x5ca3 yes no 31 */ 32 33 #include <linux/module.h> 34 #include <linux/init.h> 35 #include <linux/slab.h> 36 #include <linux/i2c.h> 37 #include <linux/hwmon.h> 38 #include <linux/hwmon-vid.h> 39 #include <linux/hwmon-sysfs.h> 40 #include <linux/err.h> 41 #include <linux/mutex.h> 42 #include <linux/fs.h> 43 #include <linux/watchdog.h> 44 #include <linux/miscdevice.h> 45 #include <linux/uaccess.h> 46 #include <linux/kref.h> 47 #include <linux/notifier.h> 48 #include <linux/reboot.h> 49 #include <linux/jiffies.h> 50 51 /* Default values */ 52 #define WATCHDOG_TIMEOUT 2 /* 2 minute default timeout */ 53 54 /* Addresses to scan */ 55 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, 56 I2C_CLIENT_END }; 57 58 /* Insmod parameters */ 59 60 static unsigned short force_subclients[4]; 61 module_param_array(force_subclients, short, NULL, 0); 62 MODULE_PARM_DESC(force_subclients, 63 "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}"); 64 65 static bool reset; 66 module_param(reset, bool, 0); 67 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended"); 68 69 static int timeout = WATCHDOG_TIMEOUT; /* default timeout in minutes */ 70 module_param(timeout, int, 0); 71 MODULE_PARM_DESC(timeout, 72 "Watchdog timeout in minutes. 2<= timeout <=255 (default=" 73 __MODULE_STRING(WATCHDOG_TIMEOUT) ")"); 74 75 static bool nowayout = WATCHDOG_NOWAYOUT; 76 module_param(nowayout, bool, 0); 77 MODULE_PARM_DESC(nowayout, 78 "Watchdog cannot be stopped once started (default=" 79 __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); 80 81 /* 82 * Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved 83 * as ID, Bank Select registers 84 */ 85 #define W83793_REG_BANKSEL 0x00 86 #define W83793_REG_VENDORID 0x0d 87 #define W83793_REG_CHIPID 0x0e 88 #define W83793_REG_DEVICEID 0x0f 89 90 #define W83793_REG_CONFIG 0x40 91 #define W83793_REG_MFC 0x58 92 #define W83793_REG_FANIN_CTRL 0x5c 93 #define W83793_REG_FANIN_SEL 0x5d 94 #define W83793_REG_I2C_ADDR 0x0b 95 #define W83793_REG_I2C_SUBADDR 0x0c 96 #define W83793_REG_VID_INA 0x05 97 #define W83793_REG_VID_INB 0x06 98 #define W83793_REG_VID_LATCHA 0x07 99 #define W83793_REG_VID_LATCHB 0x08 100 #define W83793_REG_VID_CTRL 0x59 101 102 #define W83793_REG_WDT_LOCK 0x01 103 #define W83793_REG_WDT_ENABLE 0x02 104 #define W83793_REG_WDT_STATUS 0x03 105 #define W83793_REG_WDT_TIMEOUT 0x04 106 107 static u16 W83793_REG_TEMP_MODE[2] = { 0x5e, 0x5f }; 108 109 #define TEMP_READ 0 110 #define TEMP_CRIT 1 111 #define TEMP_CRIT_HYST 2 112 #define TEMP_WARN 3 113 #define TEMP_WARN_HYST 4 114 /* 115 * only crit and crit_hyst affect real-time alarm status 116 * current crit crit_hyst warn warn_hyst 117 */ 118 static u16 W83793_REG_TEMP[][5] = { 119 {0x1c, 0x78, 0x79, 0x7a, 0x7b}, 120 {0x1d, 0x7c, 0x7d, 0x7e, 0x7f}, 121 {0x1e, 0x80, 0x81, 0x82, 0x83}, 122 {0x1f, 0x84, 0x85, 0x86, 0x87}, 123 {0x20, 0x88, 0x89, 0x8a, 0x8b}, 124 {0x21, 0x8c, 0x8d, 0x8e, 0x8f}, 125 }; 126 127 #define W83793_REG_TEMP_LOW_BITS 0x22 128 129 #define W83793_REG_BEEP(index) (0x53 + (index)) 130 #define W83793_REG_ALARM(index) (0x4b + (index)) 131 132 #define W83793_REG_CLR_CHASSIS 0x4a /* SMI MASK4 */ 133 #define W83793_REG_IRQ_CTRL 0x50 134 #define W83793_REG_OVT_CTRL 0x51 135 #define W83793_REG_OVT_BEEP 0x52 136 137 #define IN_READ 0 138 #define IN_MAX 1 139 #define IN_LOW 2 140 static const u16 W83793_REG_IN[][3] = { 141 /* Current, High, Low */ 142 {0x10, 0x60, 0x61}, /* Vcore A */ 143 {0x11, 0x62, 0x63}, /* Vcore B */ 144 {0x12, 0x64, 0x65}, /* Vtt */ 145 {0x14, 0x6a, 0x6b}, /* VSEN1 */ 146 {0x15, 0x6c, 0x6d}, /* VSEN2 */ 147 {0x16, 0x6e, 0x6f}, /* +3VSEN */ 148 {0x17, 0x70, 0x71}, /* +12VSEN */ 149 {0x18, 0x72, 0x73}, /* 5VDD */ 150 {0x19, 0x74, 0x75}, /* 5VSB */ 151 {0x1a, 0x76, 0x77}, /* VBAT */ 152 }; 153 154 /* Low Bits of Vcore A/B Vtt Read/High/Low */ 155 static const u16 W83793_REG_IN_LOW_BITS[] = { 0x1b, 0x68, 0x69 }; 156 static u8 scale_in[] = { 2, 2, 2, 16, 16, 16, 8, 24, 24, 16 }; 157 static u8 scale_in_add[] = { 0, 0, 0, 0, 0, 0, 0, 150, 150, 0 }; 158 159 #define W83793_REG_FAN(index) (0x23 + 2 * (index)) /* High byte */ 160 #define W83793_REG_FAN_MIN(index) (0x90 + 2 * (index)) /* High byte */ 161 162 #define W83793_REG_PWM_DEFAULT 0xb2 163 #define W83793_REG_PWM_ENABLE 0x207 164 #define W83793_REG_PWM_UPTIME 0xc3 /* Unit in 0.1 second */ 165 #define W83793_REG_PWM_DOWNTIME 0xc4 /* Unit in 0.1 second */ 166 #define W83793_REG_TEMP_CRITICAL 0xc5 167 168 #define PWM_DUTY 0 169 #define PWM_START 1 170 #define PWM_NONSTOP 2 171 #define PWM_STOP_TIME 3 172 #define W83793_REG_PWM(index, nr) (((nr) == 0 ? 0xb3 : \ 173 (nr) == 1 ? 0x220 : 0x218) + (index)) 174 175 /* bit field, fan1 is bit0, fan2 is bit1 ... */ 176 #define W83793_REG_TEMP_FAN_MAP(index) (0x201 + (index)) 177 #define W83793_REG_TEMP_TOL(index) (0x208 + (index)) 178 #define W83793_REG_TEMP_CRUISE(index) (0x210 + (index)) 179 #define W83793_REG_PWM_STOP_TIME(index) (0x228 + (index)) 180 #define W83793_REG_SF2_TEMP(index, nr) (0x230 + ((index) << 4) + (nr)) 181 #define W83793_REG_SF2_PWM(index, nr) (0x238 + ((index) << 4) + (nr)) 182 183 static inline unsigned long FAN_FROM_REG(u16 val) 184 { 185 if ((val >= 0xfff) || (val == 0)) 186 return 0; 187 return 1350000UL / val; 188 } 189 190 static inline u16 FAN_TO_REG(long rpm) 191 { 192 if (rpm <= 0) 193 return 0x0fff; 194 return clamp_val((1350000 + (rpm >> 1)) / rpm, 1, 0xffe); 195 } 196 197 static inline unsigned long TIME_FROM_REG(u8 reg) 198 { 199 return reg * 100; 200 } 201 202 static inline u8 TIME_TO_REG(unsigned long val) 203 { 204 return clamp_val((val + 50) / 100, 0, 0xff); 205 } 206 207 static inline long TEMP_FROM_REG(s8 reg) 208 { 209 return reg * 1000; 210 } 211 212 static inline s8 TEMP_TO_REG(long val, s8 min, s8 max) 213 { 214 return clamp_val((val + (val < 0 ? -500 : 500)) / 1000, min, max); 215 } 216 217 struct w83793_data { 218 struct i2c_client *lm75[2]; 219 struct device *hwmon_dev; 220 struct mutex update_lock; 221 char valid; /* !=0 if following fields are valid */ 222 unsigned long last_updated; /* In jiffies */ 223 unsigned long last_nonvolatile; /* In jiffies, last time we update the 224 * nonvolatile registers 225 */ 226 227 u8 bank; 228 u8 vrm; 229 u8 vid[2]; 230 u8 in[10][3]; /* Register value, read/high/low */ 231 u8 in_low_bits[3]; /* Additional resolution for VCore A/B Vtt */ 232 233 u16 has_fan; /* Only fan1- fan5 has own pins */ 234 u16 fan[12]; /* Register value combine */ 235 u16 fan_min[12]; /* Register value combine */ 236 237 s8 temp[6][5]; /* current, crit, crit_hyst,warn, warn_hyst */ 238 u8 temp_low_bits; /* Additional resolution TD1-TD4 */ 239 u8 temp_mode[2]; /* byte 0: Temp D1-D4 mode each has 2 bits 240 * byte 1: Temp R1,R2 mode, each has 1 bit 241 */ 242 u8 temp_critical; /* If reached all fan will be at full speed */ 243 u8 temp_fan_map[6]; /* Temp controls which pwm fan, bit field */ 244 245 u8 has_pwm; 246 u8 has_temp; 247 u8 has_vid; 248 u8 pwm_enable; /* Register value, each Temp has 1 bit */ 249 u8 pwm_uptime; /* Register value */ 250 u8 pwm_downtime; /* Register value */ 251 u8 pwm_default; /* All fan default pwm, next poweron valid */ 252 u8 pwm[8][3]; /* Register value */ 253 u8 pwm_stop_time[8]; 254 u8 temp_cruise[6]; 255 256 u8 alarms[5]; /* realtime status registers */ 257 u8 beeps[5]; 258 u8 beep_enable; 259 u8 tolerance[3]; /* Temp tolerance(Smart Fan I/II) */ 260 u8 sf2_pwm[6][7]; /* Smart FanII: Fan duty cycle */ 261 u8 sf2_temp[6][7]; /* Smart FanII: Temp level point */ 262 263 /* watchdog */ 264 struct i2c_client *client; 265 struct mutex watchdog_lock; 266 struct list_head list; /* member of the watchdog_data_list */ 267 struct kref kref; 268 struct miscdevice watchdog_miscdev; 269 unsigned long watchdog_is_open; 270 char watchdog_expect_close; 271 char watchdog_name[10]; /* must be unique to avoid sysfs conflict */ 272 unsigned int watchdog_caused_reboot; 273 int watchdog_timeout; /* watchdog timeout in minutes */ 274 }; 275 276 /* 277 * Somewhat ugly :( global data pointer list with all devices, so that 278 * we can find our device data as when using misc_register. There is no 279 * other method to get to one's device data from the open file-op and 280 * for usage in the reboot notifier callback. 281 */ 282 static LIST_HEAD(watchdog_data_list); 283 284 /* Note this lock not only protect list access, but also data.kref access */ 285 static DEFINE_MUTEX(watchdog_data_mutex); 286 287 /* 288 * Release our data struct when we're detached from the i2c client *and* all 289 * references to our watchdog device are released 290 */ 291 static void w83793_release_resources(struct kref *ref) 292 { 293 struct w83793_data *data = container_of(ref, struct w83793_data, kref); 294 kfree(data); 295 } 296 297 static u8 w83793_read_value(struct i2c_client *client, u16 reg); 298 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value); 299 static int w83793_probe(struct i2c_client *client, 300 const struct i2c_device_id *id); 301 static int w83793_detect(struct i2c_client *client, 302 struct i2c_board_info *info); 303 static int w83793_remove(struct i2c_client *client); 304 static void w83793_init_client(struct i2c_client *client); 305 static void w83793_update_nonvolatile(struct device *dev); 306 static struct w83793_data *w83793_update_device(struct device *dev); 307 308 static const struct i2c_device_id w83793_id[] = { 309 { "w83793", 0 }, 310 { } 311 }; 312 MODULE_DEVICE_TABLE(i2c, w83793_id); 313 314 static struct i2c_driver w83793_driver = { 315 .class = I2C_CLASS_HWMON, 316 .driver = { 317 .name = "w83793", 318 }, 319 .probe = w83793_probe, 320 .remove = w83793_remove, 321 .id_table = w83793_id, 322 .detect = w83793_detect, 323 .address_list = normal_i2c, 324 }; 325 326 static ssize_t 327 show_vrm(struct device *dev, struct device_attribute *attr, char *buf) 328 { 329 struct w83793_data *data = dev_get_drvdata(dev); 330 return sprintf(buf, "%d\n", data->vrm); 331 } 332 333 static ssize_t 334 show_vid(struct device *dev, struct device_attribute *attr, char *buf) 335 { 336 struct w83793_data *data = w83793_update_device(dev); 337 struct sensor_device_attribute_2 *sensor_attr = 338 to_sensor_dev_attr_2(attr); 339 int index = sensor_attr->index; 340 341 return sprintf(buf, "%d\n", vid_from_reg(data->vid[index], data->vrm)); 342 } 343 344 static ssize_t 345 store_vrm(struct device *dev, struct device_attribute *attr, 346 const char *buf, size_t count) 347 { 348 struct w83793_data *data = dev_get_drvdata(dev); 349 unsigned long val; 350 int err; 351 352 err = kstrtoul(buf, 10, &val); 353 if (err) 354 return err; 355 356 if (val > 255) 357 return -EINVAL; 358 359 data->vrm = val; 360 return count; 361 } 362 363 #define ALARM_STATUS 0 364 #define BEEP_ENABLE 1 365 static ssize_t 366 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf) 367 { 368 struct w83793_data *data = w83793_update_device(dev); 369 struct sensor_device_attribute_2 *sensor_attr = 370 to_sensor_dev_attr_2(attr); 371 int nr = sensor_attr->nr; 372 int index = sensor_attr->index >> 3; 373 int bit = sensor_attr->index & 0x07; 374 u8 val; 375 376 if (nr == ALARM_STATUS) { 377 val = (data->alarms[index] >> (bit)) & 1; 378 } else { /* BEEP_ENABLE */ 379 val = (data->beeps[index] >> (bit)) & 1; 380 } 381 382 return sprintf(buf, "%u\n", val); 383 } 384 385 static ssize_t 386 store_beep(struct device *dev, struct device_attribute *attr, 387 const char *buf, size_t count) 388 { 389 struct i2c_client *client = to_i2c_client(dev); 390 struct w83793_data *data = i2c_get_clientdata(client); 391 struct sensor_device_attribute_2 *sensor_attr = 392 to_sensor_dev_attr_2(attr); 393 int index = sensor_attr->index >> 3; 394 int shift = sensor_attr->index & 0x07; 395 u8 beep_bit = 1 << shift; 396 unsigned long val; 397 int err; 398 399 err = kstrtoul(buf, 10, &val); 400 if (err) 401 return err; 402 403 if (val > 1) 404 return -EINVAL; 405 406 mutex_lock(&data->update_lock); 407 data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index)); 408 data->beeps[index] &= ~beep_bit; 409 data->beeps[index] |= val << shift; 410 w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]); 411 mutex_unlock(&data->update_lock); 412 413 return count; 414 } 415 416 static ssize_t 417 show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf) 418 { 419 struct w83793_data *data = w83793_update_device(dev); 420 return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01); 421 } 422 423 static ssize_t 424 store_beep_enable(struct device *dev, struct device_attribute *attr, 425 const char *buf, size_t count) 426 { 427 struct i2c_client *client = to_i2c_client(dev); 428 struct w83793_data *data = i2c_get_clientdata(client); 429 unsigned long val; 430 int err; 431 432 err = kstrtoul(buf, 10, &val); 433 if (err) 434 return err; 435 436 if (val > 1) 437 return -EINVAL; 438 439 mutex_lock(&data->update_lock); 440 data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP) 441 & 0xfd; 442 data->beep_enable |= val << 1; 443 w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable); 444 mutex_unlock(&data->update_lock); 445 446 return count; 447 } 448 449 /* Write 0 to clear chassis alarm */ 450 static ssize_t 451 store_chassis_clear(struct device *dev, 452 struct device_attribute *attr, const char *buf, 453 size_t count) 454 { 455 struct i2c_client *client = to_i2c_client(dev); 456 struct w83793_data *data = i2c_get_clientdata(client); 457 unsigned long val; 458 u8 reg; 459 int err; 460 461 err = kstrtoul(buf, 10, &val); 462 if (err) 463 return err; 464 if (val) 465 return -EINVAL; 466 467 mutex_lock(&data->update_lock); 468 reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS); 469 w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80); 470 data->valid = 0; /* Force cache refresh */ 471 mutex_unlock(&data->update_lock); 472 return count; 473 } 474 475 #define FAN_INPUT 0 476 #define FAN_MIN 1 477 static ssize_t 478 show_fan(struct device *dev, struct device_attribute *attr, char *buf) 479 { 480 struct sensor_device_attribute_2 *sensor_attr = 481 to_sensor_dev_attr_2(attr); 482 int nr = sensor_attr->nr; 483 int index = sensor_attr->index; 484 struct w83793_data *data = w83793_update_device(dev); 485 u16 val; 486 487 if (nr == FAN_INPUT) 488 val = data->fan[index] & 0x0fff; 489 else 490 val = data->fan_min[index] & 0x0fff; 491 492 return sprintf(buf, "%lu\n", FAN_FROM_REG(val)); 493 } 494 495 static ssize_t 496 store_fan_min(struct device *dev, struct device_attribute *attr, 497 const char *buf, size_t count) 498 { 499 struct sensor_device_attribute_2 *sensor_attr = 500 to_sensor_dev_attr_2(attr); 501 int index = sensor_attr->index; 502 struct i2c_client *client = to_i2c_client(dev); 503 struct w83793_data *data = i2c_get_clientdata(client); 504 unsigned long val; 505 int err; 506 507 err = kstrtoul(buf, 10, &val); 508 if (err) 509 return err; 510 val = FAN_TO_REG(val); 511 512 mutex_lock(&data->update_lock); 513 data->fan_min[index] = val; 514 w83793_write_value(client, W83793_REG_FAN_MIN(index), 515 (val >> 8) & 0xff); 516 w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff); 517 mutex_unlock(&data->update_lock); 518 519 return count; 520 } 521 522 static ssize_t 523 show_pwm(struct device *dev, struct device_attribute *attr, char *buf) 524 { 525 struct sensor_device_attribute_2 *sensor_attr = 526 to_sensor_dev_attr_2(attr); 527 struct w83793_data *data = w83793_update_device(dev); 528 u16 val; 529 int nr = sensor_attr->nr; 530 int index = sensor_attr->index; 531 532 if (nr == PWM_STOP_TIME) 533 val = TIME_FROM_REG(data->pwm_stop_time[index]); 534 else 535 val = (data->pwm[index][nr] & 0x3f) << 2; 536 537 return sprintf(buf, "%d\n", val); 538 } 539 540 static ssize_t 541 store_pwm(struct device *dev, struct device_attribute *attr, 542 const char *buf, size_t count) 543 { 544 struct i2c_client *client = to_i2c_client(dev); 545 struct w83793_data *data = i2c_get_clientdata(client); 546 struct sensor_device_attribute_2 *sensor_attr = 547 to_sensor_dev_attr_2(attr); 548 int nr = sensor_attr->nr; 549 int index = sensor_attr->index; 550 unsigned long val; 551 int err; 552 553 err = kstrtoul(buf, 10, &val); 554 if (err) 555 return err; 556 557 mutex_lock(&data->update_lock); 558 if (nr == PWM_STOP_TIME) { 559 val = TIME_TO_REG(val); 560 data->pwm_stop_time[index] = val; 561 w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index), 562 val); 563 } else { 564 val = clamp_val(val, 0, 0xff) >> 2; 565 data->pwm[index][nr] = 566 w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0; 567 data->pwm[index][nr] |= val; 568 w83793_write_value(client, W83793_REG_PWM(index, nr), 569 data->pwm[index][nr]); 570 } 571 572 mutex_unlock(&data->update_lock); 573 return count; 574 } 575 576 static ssize_t 577 show_temp(struct device *dev, struct device_attribute *attr, char *buf) 578 { 579 struct sensor_device_attribute_2 *sensor_attr = 580 to_sensor_dev_attr_2(attr); 581 int nr = sensor_attr->nr; 582 int index = sensor_attr->index; 583 struct w83793_data *data = w83793_update_device(dev); 584 long temp = TEMP_FROM_REG(data->temp[index][nr]); 585 586 if (nr == TEMP_READ && index < 4) { /* Only TD1-TD4 have low bits */ 587 int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250; 588 temp += temp > 0 ? low : -low; 589 } 590 return sprintf(buf, "%ld\n", temp); 591 } 592 593 static ssize_t 594 store_temp(struct device *dev, struct device_attribute *attr, 595 const char *buf, size_t count) 596 { 597 struct sensor_device_attribute_2 *sensor_attr = 598 to_sensor_dev_attr_2(attr); 599 int nr = sensor_attr->nr; 600 int index = sensor_attr->index; 601 struct i2c_client *client = to_i2c_client(dev); 602 struct w83793_data *data = i2c_get_clientdata(client); 603 long tmp; 604 int err; 605 606 err = kstrtol(buf, 10, &tmp); 607 if (err) 608 return err; 609 610 mutex_lock(&data->update_lock); 611 data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127); 612 w83793_write_value(client, W83793_REG_TEMP[index][nr], 613 data->temp[index][nr]); 614 mutex_unlock(&data->update_lock); 615 return count; 616 } 617 618 /* 619 * TD1-TD4 620 * each has 4 mode:(2 bits) 621 * 0: Stop monitor 622 * 1: Use internal temp sensor(default) 623 * 2: Reserved 624 * 3: Use sensor in Intel CPU and get result by PECI 625 * 626 * TR1-TR2 627 * each has 2 mode:(1 bit) 628 * 0: Disable temp sensor monitor 629 * 1: To enable temp sensors monitor 630 */ 631 632 /* 0 disable, 6 PECI */ 633 static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 }; 634 635 static ssize_t 636 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf) 637 { 638 struct w83793_data *data = w83793_update_device(dev); 639 struct sensor_device_attribute_2 *sensor_attr = 640 to_sensor_dev_attr_2(attr); 641 int index = sensor_attr->index; 642 u8 mask = (index < 4) ? 0x03 : 0x01; 643 u8 shift = (index < 4) ? (2 * index) : (index - 4); 644 u8 tmp; 645 index = (index < 4) ? 0 : 1; 646 647 tmp = (data->temp_mode[index] >> shift) & mask; 648 649 /* for the internal sensor, found out if diode or thermistor */ 650 if (tmp == 1) 651 tmp = index == 0 ? 3 : 4; 652 else 653 tmp = TO_TEMP_MODE[tmp]; 654 655 return sprintf(buf, "%d\n", tmp); 656 } 657 658 static ssize_t 659 store_temp_mode(struct device *dev, struct device_attribute *attr, 660 const char *buf, size_t count) 661 { 662 struct i2c_client *client = to_i2c_client(dev); 663 struct w83793_data *data = i2c_get_clientdata(client); 664 struct sensor_device_attribute_2 *sensor_attr = 665 to_sensor_dev_attr_2(attr); 666 int index = sensor_attr->index; 667 u8 mask = (index < 4) ? 0x03 : 0x01; 668 u8 shift = (index < 4) ? (2 * index) : (index - 4); 669 unsigned long val; 670 int err; 671 672 err = kstrtoul(buf, 10, &val); 673 if (err) 674 return err; 675 676 /* transform the sysfs interface values into table above */ 677 if ((val == 6) && (index < 4)) { 678 val -= 3; 679 } else if ((val == 3 && index < 4) 680 || (val == 4 && index >= 4)) { 681 /* transform diode or thermistor into internal enable */ 682 val = !!val; 683 } else { 684 return -EINVAL; 685 } 686 687 index = (index < 4) ? 0 : 1; 688 mutex_lock(&data->update_lock); 689 data->temp_mode[index] = 690 w83793_read_value(client, W83793_REG_TEMP_MODE[index]); 691 data->temp_mode[index] &= ~(mask << shift); 692 data->temp_mode[index] |= val << shift; 693 w83793_write_value(client, W83793_REG_TEMP_MODE[index], 694 data->temp_mode[index]); 695 mutex_unlock(&data->update_lock); 696 697 return count; 698 } 699 700 #define SETUP_PWM_DEFAULT 0 701 #define SETUP_PWM_UPTIME 1 /* Unit in 0.1s */ 702 #define SETUP_PWM_DOWNTIME 2 /* Unit in 0.1s */ 703 #define SETUP_TEMP_CRITICAL 3 704 static ssize_t 705 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf) 706 { 707 struct sensor_device_attribute_2 *sensor_attr = 708 to_sensor_dev_attr_2(attr); 709 int nr = sensor_attr->nr; 710 struct w83793_data *data = w83793_update_device(dev); 711 u32 val = 0; 712 713 if (nr == SETUP_PWM_DEFAULT) 714 val = (data->pwm_default & 0x3f) << 2; 715 else if (nr == SETUP_PWM_UPTIME) 716 val = TIME_FROM_REG(data->pwm_uptime); 717 else if (nr == SETUP_PWM_DOWNTIME) 718 val = TIME_FROM_REG(data->pwm_downtime); 719 else if (nr == SETUP_TEMP_CRITICAL) 720 val = TEMP_FROM_REG(data->temp_critical & 0x7f); 721 722 return sprintf(buf, "%d\n", val); 723 } 724 725 static ssize_t 726 store_sf_setup(struct device *dev, struct device_attribute *attr, 727 const char *buf, size_t count) 728 { 729 struct sensor_device_attribute_2 *sensor_attr = 730 to_sensor_dev_attr_2(attr); 731 int nr = sensor_attr->nr; 732 struct i2c_client *client = to_i2c_client(dev); 733 struct w83793_data *data = i2c_get_clientdata(client); 734 long val; 735 int err; 736 737 err = kstrtol(buf, 10, &val); 738 if (err) 739 return err; 740 741 mutex_lock(&data->update_lock); 742 if (nr == SETUP_PWM_DEFAULT) { 743 data->pwm_default = 744 w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0; 745 data->pwm_default |= clamp_val(val, 0, 0xff) >> 2; 746 w83793_write_value(client, W83793_REG_PWM_DEFAULT, 747 data->pwm_default); 748 } else if (nr == SETUP_PWM_UPTIME) { 749 data->pwm_uptime = TIME_TO_REG(val); 750 data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0; 751 w83793_write_value(client, W83793_REG_PWM_UPTIME, 752 data->pwm_uptime); 753 } else if (nr == SETUP_PWM_DOWNTIME) { 754 data->pwm_downtime = TIME_TO_REG(val); 755 data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0; 756 w83793_write_value(client, W83793_REG_PWM_DOWNTIME, 757 data->pwm_downtime); 758 } else { /* SETUP_TEMP_CRITICAL */ 759 data->temp_critical = 760 w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80; 761 data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f); 762 w83793_write_value(client, W83793_REG_TEMP_CRITICAL, 763 data->temp_critical); 764 } 765 766 mutex_unlock(&data->update_lock); 767 return count; 768 } 769 770 /* 771 * Temp SmartFan control 772 * TEMP_FAN_MAP 773 * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1... 774 * It's possible two or more temp channels control the same fan, w83793 775 * always prefers to pick the most critical request and applies it to 776 * the related Fan. 777 * It's possible one fan is not in any mapping of 6 temp channels, this 778 * means the fan is manual mode 779 * 780 * TEMP_PWM_ENABLE 781 * Each temp channel has its own SmartFan mode, and temp channel 782 * control fans that are set by TEMP_FAN_MAP 783 * 0: SmartFanII mode 784 * 1: Thermal Cruise Mode 785 * 786 * TEMP_CRUISE 787 * Target temperature in thermal cruise mode, w83793 will try to turn 788 * fan speed to keep the temperature of target device around this 789 * temperature. 790 * 791 * TEMP_TOLERANCE 792 * If Temp higher or lower than target with this tolerance, w83793 793 * will take actions to speed up or slow down the fan to keep the 794 * temperature within the tolerance range. 795 */ 796 797 #define TEMP_FAN_MAP 0 798 #define TEMP_PWM_ENABLE 1 799 #define TEMP_CRUISE 2 800 #define TEMP_TOLERANCE 3 801 static ssize_t 802 show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf) 803 { 804 struct sensor_device_attribute_2 *sensor_attr = 805 to_sensor_dev_attr_2(attr); 806 int nr = sensor_attr->nr; 807 int index = sensor_attr->index; 808 struct w83793_data *data = w83793_update_device(dev); 809 u32 val; 810 811 if (nr == TEMP_FAN_MAP) { 812 val = data->temp_fan_map[index]; 813 } else if (nr == TEMP_PWM_ENABLE) { 814 /* +2 to transform into 2 and 3 to conform with sysfs intf */ 815 val = ((data->pwm_enable >> index) & 0x01) + 2; 816 } else if (nr == TEMP_CRUISE) { 817 val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f); 818 } else { /* TEMP_TOLERANCE */ 819 val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0); 820 val = TEMP_FROM_REG(val & 0x0f); 821 } 822 return sprintf(buf, "%d\n", val); 823 } 824 825 static ssize_t 826 store_sf_ctrl(struct device *dev, struct device_attribute *attr, 827 const char *buf, size_t count) 828 { 829 struct sensor_device_attribute_2 *sensor_attr = 830 to_sensor_dev_attr_2(attr); 831 int nr = sensor_attr->nr; 832 int index = sensor_attr->index; 833 struct i2c_client *client = to_i2c_client(dev); 834 struct w83793_data *data = i2c_get_clientdata(client); 835 long val; 836 int err; 837 838 err = kstrtol(buf, 10, &val); 839 if (err) 840 return err; 841 842 mutex_lock(&data->update_lock); 843 if (nr == TEMP_FAN_MAP) { 844 val = clamp_val(val, 0, 255); 845 w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val); 846 data->temp_fan_map[index] = val; 847 } else if (nr == TEMP_PWM_ENABLE) { 848 if (val == 2 || val == 3) { 849 data->pwm_enable = 850 w83793_read_value(client, W83793_REG_PWM_ENABLE); 851 if (val - 2) 852 data->pwm_enable |= 1 << index; 853 else 854 data->pwm_enable &= ~(1 << index); 855 w83793_write_value(client, W83793_REG_PWM_ENABLE, 856 data->pwm_enable); 857 } else { 858 mutex_unlock(&data->update_lock); 859 return -EINVAL; 860 } 861 } else if (nr == TEMP_CRUISE) { 862 data->temp_cruise[index] = 863 w83793_read_value(client, W83793_REG_TEMP_CRUISE(index)); 864 data->temp_cruise[index] &= 0x80; 865 data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f); 866 867 w83793_write_value(client, W83793_REG_TEMP_CRUISE(index), 868 data->temp_cruise[index]); 869 } else { /* TEMP_TOLERANCE */ 870 int i = index >> 1; 871 u8 shift = (index & 0x01) ? 4 : 0; 872 data->tolerance[i] = 873 w83793_read_value(client, W83793_REG_TEMP_TOL(i)); 874 875 data->tolerance[i] &= ~(0x0f << shift); 876 data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift; 877 w83793_write_value(client, W83793_REG_TEMP_TOL(i), 878 data->tolerance[i]); 879 } 880 881 mutex_unlock(&data->update_lock); 882 return count; 883 } 884 885 static ssize_t 886 show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf) 887 { 888 struct sensor_device_attribute_2 *sensor_attr = 889 to_sensor_dev_attr_2(attr); 890 int nr = sensor_attr->nr; 891 int index = sensor_attr->index; 892 struct w83793_data *data = w83793_update_device(dev); 893 894 return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2); 895 } 896 897 static ssize_t 898 store_sf2_pwm(struct device *dev, struct device_attribute *attr, 899 const char *buf, size_t count) 900 { 901 struct i2c_client *client = to_i2c_client(dev); 902 struct w83793_data *data = i2c_get_clientdata(client); 903 struct sensor_device_attribute_2 *sensor_attr = 904 to_sensor_dev_attr_2(attr); 905 int nr = sensor_attr->nr; 906 int index = sensor_attr->index; 907 unsigned long val; 908 int err; 909 910 err = kstrtoul(buf, 10, &val); 911 if (err) 912 return err; 913 val = clamp_val(val, 0, 0xff) >> 2; 914 915 mutex_lock(&data->update_lock); 916 data->sf2_pwm[index][nr] = 917 w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0; 918 data->sf2_pwm[index][nr] |= val; 919 w83793_write_value(client, W83793_REG_SF2_PWM(index, nr), 920 data->sf2_pwm[index][nr]); 921 mutex_unlock(&data->update_lock); 922 return count; 923 } 924 925 static ssize_t 926 show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf) 927 { 928 struct sensor_device_attribute_2 *sensor_attr = 929 to_sensor_dev_attr_2(attr); 930 int nr = sensor_attr->nr; 931 int index = sensor_attr->index; 932 struct w83793_data *data = w83793_update_device(dev); 933 934 return sprintf(buf, "%ld\n", 935 TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f)); 936 } 937 938 static ssize_t 939 store_sf2_temp(struct device *dev, struct device_attribute *attr, 940 const char *buf, size_t count) 941 { 942 struct i2c_client *client = to_i2c_client(dev); 943 struct w83793_data *data = i2c_get_clientdata(client); 944 struct sensor_device_attribute_2 *sensor_attr = 945 to_sensor_dev_attr_2(attr); 946 int nr = sensor_attr->nr; 947 int index = sensor_attr->index; 948 long val; 949 int err; 950 951 err = kstrtol(buf, 10, &val); 952 if (err) 953 return err; 954 val = TEMP_TO_REG(val, 0, 0x7f); 955 956 mutex_lock(&data->update_lock); 957 data->sf2_temp[index][nr] = 958 w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80; 959 data->sf2_temp[index][nr] |= val; 960 w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr), 961 data->sf2_temp[index][nr]); 962 mutex_unlock(&data->update_lock); 963 return count; 964 } 965 966 /* only Vcore A/B and Vtt have additional 2 bits precision */ 967 static ssize_t 968 show_in(struct device *dev, struct device_attribute *attr, char *buf) 969 { 970 struct sensor_device_attribute_2 *sensor_attr = 971 to_sensor_dev_attr_2(attr); 972 int nr = sensor_attr->nr; 973 int index = sensor_attr->index; 974 struct w83793_data *data = w83793_update_device(dev); 975 u16 val = data->in[index][nr]; 976 977 if (index < 3) { 978 val <<= 2; 979 val += (data->in_low_bits[nr] >> (index * 2)) & 0x3; 980 } 981 /* voltage inputs 5VDD and 5VSB needs 150mV offset */ 982 val = val * scale_in[index] + scale_in_add[index]; 983 return sprintf(buf, "%d\n", val); 984 } 985 986 static ssize_t 987 store_in(struct device *dev, struct device_attribute *attr, 988 const char *buf, size_t count) 989 { 990 struct sensor_device_attribute_2 *sensor_attr = 991 to_sensor_dev_attr_2(attr); 992 int nr = sensor_attr->nr; 993 int index = sensor_attr->index; 994 struct i2c_client *client = to_i2c_client(dev); 995 struct w83793_data *data = i2c_get_clientdata(client); 996 unsigned long val; 997 int err; 998 999 err = kstrtoul(buf, 10, &val); 1000 if (err) 1001 return err; 1002 val = (val + scale_in[index] / 2) / scale_in[index]; 1003 1004 mutex_lock(&data->update_lock); 1005 if (index > 2) { 1006 /* fix the limit values of 5VDD and 5VSB to ALARM mechanism */ 1007 if (nr == 1 || nr == 2) 1008 val -= scale_in_add[index] / scale_in[index]; 1009 val = clamp_val(val, 0, 255); 1010 } else { 1011 val = clamp_val(val, 0, 0x3FF); 1012 data->in_low_bits[nr] = 1013 w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]); 1014 data->in_low_bits[nr] &= ~(0x03 << (2 * index)); 1015 data->in_low_bits[nr] |= (val & 0x03) << (2 * index); 1016 w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr], 1017 data->in_low_bits[nr]); 1018 val >>= 2; 1019 } 1020 data->in[index][nr] = val; 1021 w83793_write_value(client, W83793_REG_IN[index][nr], 1022 data->in[index][nr]); 1023 mutex_unlock(&data->update_lock); 1024 return count; 1025 } 1026 1027 #define NOT_USED -1 1028 1029 #define SENSOR_ATTR_IN(index) \ 1030 SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL, \ 1031 IN_READ, index), \ 1032 SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in, \ 1033 store_in, IN_MAX, index), \ 1034 SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in, \ 1035 store_in, IN_LOW, index), \ 1036 SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep, \ 1037 NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)), \ 1038 SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO, \ 1039 show_alarm_beep, store_beep, BEEP_ENABLE, \ 1040 index + ((index > 2) ? 1 : 0)) 1041 1042 #define SENSOR_ATTR_FAN(index) \ 1043 SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep, \ 1044 NULL, ALARM_STATUS, index + 17), \ 1045 SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO, \ 1046 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17), \ 1047 SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan, \ 1048 NULL, FAN_INPUT, index - 1), \ 1049 SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO, \ 1050 show_fan, store_fan_min, FAN_MIN, index - 1) 1051 1052 #define SENSOR_ATTR_PWM(index) \ 1053 SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm, \ 1054 store_pwm, PWM_DUTY, index - 1), \ 1055 SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO, \ 1056 show_pwm, store_pwm, PWM_NONSTOP, index - 1), \ 1057 SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO, \ 1058 show_pwm, store_pwm, PWM_START, index - 1), \ 1059 SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO, \ 1060 show_pwm, store_pwm, PWM_STOP_TIME, index - 1) 1061 1062 #define SENSOR_ATTR_TEMP(index) \ 1063 SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR, \ 1064 show_temp_mode, store_temp_mode, NOT_USED, index - 1), \ 1065 SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp, \ 1066 NULL, TEMP_READ, index - 1), \ 1067 SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp, \ 1068 store_temp, TEMP_CRIT, index - 1), \ 1069 SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR, \ 1070 show_temp, store_temp, TEMP_CRIT_HYST, index - 1), \ 1071 SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp, \ 1072 store_temp, TEMP_WARN, index - 1), \ 1073 SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR, \ 1074 show_temp, store_temp, TEMP_WARN_HYST, index - 1), \ 1075 SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO, \ 1076 show_alarm_beep, NULL, ALARM_STATUS, index + 11), \ 1077 SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO, \ 1078 show_alarm_beep, store_beep, BEEP_ENABLE, index + 11), \ 1079 SENSOR_ATTR_2(temp##index##_auto_channels_pwm, \ 1080 S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl, \ 1081 TEMP_FAN_MAP, index - 1), \ 1082 SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO, \ 1083 show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE, \ 1084 index - 1), \ 1085 SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR, \ 1086 show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1), \ 1087 SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\ 1088 store_sf_ctrl, TEMP_TOLERANCE, index - 1), \ 1089 SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \ 1090 show_sf2_pwm, store_sf2_pwm, 0, index - 1), \ 1091 SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \ 1092 show_sf2_pwm, store_sf2_pwm, 1, index - 1), \ 1093 SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \ 1094 show_sf2_pwm, store_sf2_pwm, 2, index - 1), \ 1095 SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \ 1096 show_sf2_pwm, store_sf2_pwm, 3, index - 1), \ 1097 SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \ 1098 show_sf2_pwm, store_sf2_pwm, 4, index - 1), \ 1099 SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \ 1100 show_sf2_pwm, store_sf2_pwm, 5, index - 1), \ 1101 SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \ 1102 show_sf2_pwm, store_sf2_pwm, 6, index - 1), \ 1103 SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\ 1104 show_sf2_temp, store_sf2_temp, 0, index - 1), \ 1105 SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\ 1106 show_sf2_temp, store_sf2_temp, 1, index - 1), \ 1107 SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\ 1108 show_sf2_temp, store_sf2_temp, 2, index - 1), \ 1109 SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\ 1110 show_sf2_temp, store_sf2_temp, 3, index - 1), \ 1111 SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\ 1112 show_sf2_temp, store_sf2_temp, 4, index - 1), \ 1113 SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\ 1114 show_sf2_temp, store_sf2_temp, 5, index - 1), \ 1115 SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\ 1116 show_sf2_temp, store_sf2_temp, 6, index - 1) 1117 1118 static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = { 1119 SENSOR_ATTR_IN(0), 1120 SENSOR_ATTR_IN(1), 1121 SENSOR_ATTR_IN(2), 1122 SENSOR_ATTR_IN(3), 1123 SENSOR_ATTR_IN(4), 1124 SENSOR_ATTR_IN(5), 1125 SENSOR_ATTR_IN(6), 1126 SENSOR_ATTR_IN(7), 1127 SENSOR_ATTR_IN(8), 1128 SENSOR_ATTR_IN(9), 1129 SENSOR_ATTR_FAN(1), 1130 SENSOR_ATTR_FAN(2), 1131 SENSOR_ATTR_FAN(3), 1132 SENSOR_ATTR_FAN(4), 1133 SENSOR_ATTR_FAN(5), 1134 SENSOR_ATTR_PWM(1), 1135 SENSOR_ATTR_PWM(2), 1136 SENSOR_ATTR_PWM(3), 1137 }; 1138 1139 static struct sensor_device_attribute_2 w83793_temp[] = { 1140 SENSOR_ATTR_TEMP(1), 1141 SENSOR_ATTR_TEMP(2), 1142 SENSOR_ATTR_TEMP(3), 1143 SENSOR_ATTR_TEMP(4), 1144 SENSOR_ATTR_TEMP(5), 1145 SENSOR_ATTR_TEMP(6), 1146 }; 1147 1148 /* Fan6-Fan12 */ 1149 static struct sensor_device_attribute_2 w83793_left_fan[] = { 1150 SENSOR_ATTR_FAN(6), 1151 SENSOR_ATTR_FAN(7), 1152 SENSOR_ATTR_FAN(8), 1153 SENSOR_ATTR_FAN(9), 1154 SENSOR_ATTR_FAN(10), 1155 SENSOR_ATTR_FAN(11), 1156 SENSOR_ATTR_FAN(12), 1157 }; 1158 1159 /* Pwm4-Pwm8 */ 1160 static struct sensor_device_attribute_2 w83793_left_pwm[] = { 1161 SENSOR_ATTR_PWM(4), 1162 SENSOR_ATTR_PWM(5), 1163 SENSOR_ATTR_PWM(6), 1164 SENSOR_ATTR_PWM(7), 1165 SENSOR_ATTR_PWM(8), 1166 }; 1167 1168 static struct sensor_device_attribute_2 w83793_vid[] = { 1169 SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0), 1170 SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1), 1171 }; 1172 static DEVICE_ATTR(vrm, S_IWUSR | S_IRUGO, show_vrm, store_vrm); 1173 1174 static struct sensor_device_attribute_2 sda_single_files[] = { 1175 SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep, 1176 store_chassis_clear, ALARM_STATUS, 30), 1177 SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable, 1178 store_beep_enable, NOT_USED, NOT_USED), 1179 SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup, 1180 store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED), 1181 SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup, 1182 store_sf_setup, SETUP_PWM_UPTIME, NOT_USED), 1183 SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup, 1184 store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED), 1185 SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup, 1186 store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED), 1187 }; 1188 1189 static void w83793_init_client(struct i2c_client *client) 1190 { 1191 if (reset) 1192 w83793_write_value(client, W83793_REG_CONFIG, 0x80); 1193 1194 /* Start monitoring */ 1195 w83793_write_value(client, W83793_REG_CONFIG, 1196 w83793_read_value(client, W83793_REG_CONFIG) | 0x01); 1197 } 1198 1199 /* 1200 * Watchdog routines 1201 */ 1202 1203 static int watchdog_set_timeout(struct w83793_data *data, int timeout) 1204 { 1205 unsigned int mtimeout; 1206 int ret; 1207 1208 mtimeout = DIV_ROUND_UP(timeout, 60); 1209 1210 if (mtimeout > 255) 1211 return -EINVAL; 1212 1213 mutex_lock(&data->watchdog_lock); 1214 if (!data->client) { 1215 ret = -ENODEV; 1216 goto leave; 1217 } 1218 1219 data->watchdog_timeout = mtimeout; 1220 1221 /* Set Timeout value (in Minutes) */ 1222 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT, 1223 data->watchdog_timeout); 1224 1225 ret = mtimeout * 60; 1226 1227 leave: 1228 mutex_unlock(&data->watchdog_lock); 1229 return ret; 1230 } 1231 1232 static int watchdog_get_timeout(struct w83793_data *data) 1233 { 1234 int timeout; 1235 1236 mutex_lock(&data->watchdog_lock); 1237 timeout = data->watchdog_timeout * 60; 1238 mutex_unlock(&data->watchdog_lock); 1239 1240 return timeout; 1241 } 1242 1243 static int watchdog_trigger(struct w83793_data *data) 1244 { 1245 int ret = 0; 1246 1247 mutex_lock(&data->watchdog_lock); 1248 if (!data->client) { 1249 ret = -ENODEV; 1250 goto leave; 1251 } 1252 1253 /* Set Timeout value (in Minutes) */ 1254 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT, 1255 data->watchdog_timeout); 1256 1257 leave: 1258 mutex_unlock(&data->watchdog_lock); 1259 return ret; 1260 } 1261 1262 static int watchdog_enable(struct w83793_data *data) 1263 { 1264 int ret = 0; 1265 1266 mutex_lock(&data->watchdog_lock); 1267 if (!data->client) { 1268 ret = -ENODEV; 1269 goto leave; 1270 } 1271 1272 /* Set initial timeout */ 1273 w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT, 1274 data->watchdog_timeout); 1275 1276 /* Enable Soft Watchdog */ 1277 w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55); 1278 1279 leave: 1280 mutex_unlock(&data->watchdog_lock); 1281 return ret; 1282 } 1283 1284 static int watchdog_disable(struct w83793_data *data) 1285 { 1286 int ret = 0; 1287 1288 mutex_lock(&data->watchdog_lock); 1289 if (!data->client) { 1290 ret = -ENODEV; 1291 goto leave; 1292 } 1293 1294 /* Disable Soft Watchdog */ 1295 w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA); 1296 1297 leave: 1298 mutex_unlock(&data->watchdog_lock); 1299 return ret; 1300 } 1301 1302 static int watchdog_open(struct inode *inode, struct file *filp) 1303 { 1304 struct w83793_data *pos, *data = NULL; 1305 int watchdog_is_open; 1306 1307 /* 1308 * We get called from drivers/char/misc.c with misc_mtx hold, and we 1309 * call misc_register() from w83793_probe() with watchdog_data_mutex 1310 * hold, as misc_register() takes the misc_mtx lock, this is a possible 1311 * deadlock, so we use mutex_trylock here. 1312 */ 1313 if (!mutex_trylock(&watchdog_data_mutex)) 1314 return -ERESTARTSYS; 1315 list_for_each_entry(pos, &watchdog_data_list, list) { 1316 if (pos->watchdog_miscdev.minor == iminor(inode)) { 1317 data = pos; 1318 break; 1319 } 1320 } 1321 1322 /* Check, if device is already open */ 1323 watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open); 1324 1325 /* 1326 * Increase data reference counter (if not already done). 1327 * Note we can never not have found data, so we don't check for this 1328 */ 1329 if (!watchdog_is_open) 1330 kref_get(&data->kref); 1331 1332 mutex_unlock(&watchdog_data_mutex); 1333 1334 /* Check, if device is already open and possibly issue error */ 1335 if (watchdog_is_open) 1336 return -EBUSY; 1337 1338 /* Enable Soft Watchdog */ 1339 watchdog_enable(data); 1340 1341 /* Store pointer to data into filp's private data */ 1342 filp->private_data = data; 1343 1344 return nonseekable_open(inode, filp); 1345 } 1346 1347 static int watchdog_close(struct inode *inode, struct file *filp) 1348 { 1349 struct w83793_data *data = filp->private_data; 1350 1351 if (data->watchdog_expect_close) { 1352 watchdog_disable(data); 1353 data->watchdog_expect_close = 0; 1354 } else { 1355 watchdog_trigger(data); 1356 dev_crit(&data->client->dev, 1357 "unexpected close, not stopping watchdog!\n"); 1358 } 1359 1360 clear_bit(0, &data->watchdog_is_open); 1361 1362 /* Decrease data reference counter */ 1363 mutex_lock(&watchdog_data_mutex); 1364 kref_put(&data->kref, w83793_release_resources); 1365 mutex_unlock(&watchdog_data_mutex); 1366 1367 return 0; 1368 } 1369 1370 static ssize_t watchdog_write(struct file *filp, const char __user *buf, 1371 size_t count, loff_t *offset) 1372 { 1373 ssize_t ret; 1374 struct w83793_data *data = filp->private_data; 1375 1376 if (count) { 1377 if (!nowayout) { 1378 size_t i; 1379 1380 /* Clear it in case it was set with a previous write */ 1381 data->watchdog_expect_close = 0; 1382 1383 for (i = 0; i != count; i++) { 1384 char c; 1385 if (get_user(c, buf + i)) 1386 return -EFAULT; 1387 if (c == 'V') 1388 data->watchdog_expect_close = 1; 1389 } 1390 } 1391 ret = watchdog_trigger(data); 1392 if (ret < 0) 1393 return ret; 1394 } 1395 return count; 1396 } 1397 1398 static long watchdog_ioctl(struct file *filp, unsigned int cmd, 1399 unsigned long arg) 1400 { 1401 struct watchdog_info ident = { 1402 .options = WDIOF_KEEPALIVEPING | 1403 WDIOF_SETTIMEOUT | 1404 WDIOF_CARDRESET, 1405 .identity = "w83793 watchdog" 1406 }; 1407 1408 int val, ret = 0; 1409 struct w83793_data *data = filp->private_data; 1410 1411 switch (cmd) { 1412 case WDIOC_GETSUPPORT: 1413 if (!nowayout) 1414 ident.options |= WDIOF_MAGICCLOSE; 1415 if (copy_to_user((void __user *)arg, &ident, sizeof(ident))) 1416 ret = -EFAULT; 1417 break; 1418 1419 case WDIOC_GETSTATUS: 1420 val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0; 1421 ret = put_user(val, (int __user *)arg); 1422 break; 1423 1424 case WDIOC_GETBOOTSTATUS: 1425 ret = put_user(0, (int __user *)arg); 1426 break; 1427 1428 case WDIOC_KEEPALIVE: 1429 ret = watchdog_trigger(data); 1430 break; 1431 1432 case WDIOC_GETTIMEOUT: 1433 val = watchdog_get_timeout(data); 1434 ret = put_user(val, (int __user *)arg); 1435 break; 1436 1437 case WDIOC_SETTIMEOUT: 1438 if (get_user(val, (int __user *)arg)) { 1439 ret = -EFAULT; 1440 break; 1441 } 1442 ret = watchdog_set_timeout(data, val); 1443 if (ret > 0) 1444 ret = put_user(ret, (int __user *)arg); 1445 break; 1446 1447 case WDIOC_SETOPTIONS: 1448 if (get_user(val, (int __user *)arg)) { 1449 ret = -EFAULT; 1450 break; 1451 } 1452 1453 if (val & WDIOS_DISABLECARD) 1454 ret = watchdog_disable(data); 1455 else if (val & WDIOS_ENABLECARD) 1456 ret = watchdog_enable(data); 1457 else 1458 ret = -EINVAL; 1459 1460 break; 1461 default: 1462 ret = -ENOTTY; 1463 } 1464 return ret; 1465 } 1466 1467 static const struct file_operations watchdog_fops = { 1468 .owner = THIS_MODULE, 1469 .llseek = no_llseek, 1470 .open = watchdog_open, 1471 .release = watchdog_close, 1472 .write = watchdog_write, 1473 .unlocked_ioctl = watchdog_ioctl, 1474 }; 1475 1476 /* 1477 * Notifier for system down 1478 */ 1479 1480 static int watchdog_notify_sys(struct notifier_block *this, unsigned long code, 1481 void *unused) 1482 { 1483 struct w83793_data *data = NULL; 1484 1485 if (code == SYS_DOWN || code == SYS_HALT) { 1486 1487 /* Disable each registered watchdog */ 1488 mutex_lock(&watchdog_data_mutex); 1489 list_for_each_entry(data, &watchdog_data_list, list) { 1490 if (data->watchdog_miscdev.minor) 1491 watchdog_disable(data); 1492 } 1493 mutex_unlock(&watchdog_data_mutex); 1494 } 1495 1496 return NOTIFY_DONE; 1497 } 1498 1499 /* 1500 * The WDT needs to learn about soft shutdowns in order to 1501 * turn the timebomb registers off. 1502 */ 1503 1504 static struct notifier_block watchdog_notifier = { 1505 .notifier_call = watchdog_notify_sys, 1506 }; 1507 1508 /* 1509 * Init / remove routines 1510 */ 1511 1512 static int w83793_remove(struct i2c_client *client) 1513 { 1514 struct w83793_data *data = i2c_get_clientdata(client); 1515 struct device *dev = &client->dev; 1516 int i, tmp; 1517 1518 /* Unregister the watchdog (if registered) */ 1519 if (data->watchdog_miscdev.minor) { 1520 misc_deregister(&data->watchdog_miscdev); 1521 1522 if (data->watchdog_is_open) { 1523 dev_warn(&client->dev, 1524 "i2c client detached with watchdog open! " 1525 "Stopping watchdog.\n"); 1526 watchdog_disable(data); 1527 } 1528 1529 mutex_lock(&watchdog_data_mutex); 1530 list_del(&data->list); 1531 mutex_unlock(&watchdog_data_mutex); 1532 1533 /* Tell the watchdog code the client is gone */ 1534 mutex_lock(&data->watchdog_lock); 1535 data->client = NULL; 1536 mutex_unlock(&data->watchdog_lock); 1537 } 1538 1539 /* Reset Configuration Register to Disable Watch Dog Registers */ 1540 tmp = w83793_read_value(client, W83793_REG_CONFIG); 1541 w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04); 1542 1543 unregister_reboot_notifier(&watchdog_notifier); 1544 1545 hwmon_device_unregister(data->hwmon_dev); 1546 1547 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) 1548 device_remove_file(dev, 1549 &w83793_sensor_attr_2[i].dev_attr); 1550 1551 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) 1552 device_remove_file(dev, &sda_single_files[i].dev_attr); 1553 1554 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) 1555 device_remove_file(dev, &w83793_vid[i].dev_attr); 1556 device_remove_file(dev, &dev_attr_vrm); 1557 1558 for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++) 1559 device_remove_file(dev, &w83793_left_fan[i].dev_attr); 1560 1561 for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++) 1562 device_remove_file(dev, &w83793_left_pwm[i].dev_attr); 1563 1564 for (i = 0; i < ARRAY_SIZE(w83793_temp); i++) 1565 device_remove_file(dev, &w83793_temp[i].dev_attr); 1566 1567 if (data->lm75[0] != NULL) 1568 i2c_unregister_device(data->lm75[0]); 1569 if (data->lm75[1] != NULL) 1570 i2c_unregister_device(data->lm75[1]); 1571 1572 /* Decrease data reference counter */ 1573 mutex_lock(&watchdog_data_mutex); 1574 kref_put(&data->kref, w83793_release_resources); 1575 mutex_unlock(&watchdog_data_mutex); 1576 1577 return 0; 1578 } 1579 1580 static int 1581 w83793_detect_subclients(struct i2c_client *client) 1582 { 1583 int i, id, err; 1584 int address = client->addr; 1585 u8 tmp; 1586 struct i2c_adapter *adapter = client->adapter; 1587 struct w83793_data *data = i2c_get_clientdata(client); 1588 1589 id = i2c_adapter_id(adapter); 1590 if (force_subclients[0] == id && force_subclients[1] == address) { 1591 for (i = 2; i <= 3; i++) { 1592 if (force_subclients[i] < 0x48 1593 || force_subclients[i] > 0x4f) { 1594 dev_err(&client->dev, 1595 "invalid subclient " 1596 "address %d; must be 0x48-0x4f\n", 1597 force_subclients[i]); 1598 err = -EINVAL; 1599 goto ERROR_SC_0; 1600 } 1601 } 1602 w83793_write_value(client, W83793_REG_I2C_SUBADDR, 1603 (force_subclients[2] & 0x07) | 1604 ((force_subclients[3] & 0x07) << 4)); 1605 } 1606 1607 tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR); 1608 if (!(tmp & 0x08)) 1609 data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (tmp & 0x7)); 1610 if (!(tmp & 0x80)) { 1611 if ((data->lm75[0] != NULL) 1612 && ((tmp & 0x7) == ((tmp >> 4) & 0x7))) { 1613 dev_err(&client->dev, 1614 "duplicate addresses 0x%x, " 1615 "use force_subclients\n", data->lm75[0]->addr); 1616 err = -ENODEV; 1617 goto ERROR_SC_1; 1618 } 1619 data->lm75[1] = i2c_new_dummy(adapter, 1620 0x48 + ((tmp >> 4) & 0x7)); 1621 } 1622 1623 return 0; 1624 1625 /* Undo inits in case of errors */ 1626 1627 ERROR_SC_1: 1628 if (data->lm75[0] != NULL) 1629 i2c_unregister_device(data->lm75[0]); 1630 ERROR_SC_0: 1631 return err; 1632 } 1633 1634 /* Return 0 if detection is successful, -ENODEV otherwise */ 1635 static int w83793_detect(struct i2c_client *client, 1636 struct i2c_board_info *info) 1637 { 1638 u8 tmp, bank, chip_id; 1639 struct i2c_adapter *adapter = client->adapter; 1640 unsigned short address = client->addr; 1641 1642 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 1643 return -ENODEV; 1644 1645 bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL); 1646 1647 tmp = bank & 0x80 ? 0x5c : 0xa3; 1648 /* Check Winbond vendor ID */ 1649 if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) { 1650 pr_debug("w83793: Detection failed at check vendor id\n"); 1651 return -ENODEV; 1652 } 1653 1654 /* 1655 * If Winbond chip, address of chip and W83793_REG_I2C_ADDR 1656 * should match 1657 */ 1658 if ((bank & 0x07) == 0 1659 && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) != 1660 (address << 1)) { 1661 pr_debug("w83793: Detection failed at check i2c addr\n"); 1662 return -ENODEV; 1663 } 1664 1665 /* Determine the chip type now */ 1666 chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID); 1667 if (chip_id != 0x7b) 1668 return -ENODEV; 1669 1670 strlcpy(info->type, "w83793", I2C_NAME_SIZE); 1671 1672 return 0; 1673 } 1674 1675 static int w83793_probe(struct i2c_client *client, 1676 const struct i2c_device_id *id) 1677 { 1678 struct device *dev = &client->dev; 1679 const int watchdog_minors[] = { WATCHDOG_MINOR, 212, 213, 214, 215 }; 1680 struct w83793_data *data; 1681 int i, tmp, val, err; 1682 int files_fan = ARRAY_SIZE(w83793_left_fan) / 7; 1683 int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5; 1684 int files_temp = ARRAY_SIZE(w83793_temp) / 6; 1685 1686 data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL); 1687 if (!data) { 1688 err = -ENOMEM; 1689 goto exit; 1690 } 1691 1692 i2c_set_clientdata(client, data); 1693 data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL); 1694 mutex_init(&data->update_lock); 1695 mutex_init(&data->watchdog_lock); 1696 INIT_LIST_HEAD(&data->list); 1697 kref_init(&data->kref); 1698 1699 /* 1700 * Store client pointer in our data struct for watchdog usage 1701 * (where the client is found through a data ptr instead of the 1702 * otherway around) 1703 */ 1704 data->client = client; 1705 1706 err = w83793_detect_subclients(client); 1707 if (err) 1708 goto free_mem; 1709 1710 /* Initialize the chip */ 1711 w83793_init_client(client); 1712 1713 /* 1714 * Only fan 1-5 has their own input pins, 1715 * Pwm 1-3 has their own pins 1716 */ 1717 data->has_fan = 0x1f; 1718 data->has_pwm = 0x07; 1719 tmp = w83793_read_value(client, W83793_REG_MFC); 1720 val = w83793_read_value(client, W83793_REG_FANIN_CTRL); 1721 1722 /* check the function of pins 49-56 */ 1723 if (tmp & 0x80) { 1724 data->has_vid |= 0x2; /* has VIDB */ 1725 } else { 1726 data->has_pwm |= 0x18; /* pwm 4,5 */ 1727 if (val & 0x01) { /* fan 6 */ 1728 data->has_fan |= 0x20; 1729 data->has_pwm |= 0x20; 1730 } 1731 if (val & 0x02) { /* fan 7 */ 1732 data->has_fan |= 0x40; 1733 data->has_pwm |= 0x40; 1734 } 1735 if (!(tmp & 0x40) && (val & 0x04)) { /* fan 8 */ 1736 data->has_fan |= 0x80; 1737 data->has_pwm |= 0x80; 1738 } 1739 } 1740 1741 /* check the function of pins 37-40 */ 1742 if (!(tmp & 0x29)) 1743 data->has_vid |= 0x1; /* has VIDA */ 1744 if (0x08 == (tmp & 0x0c)) { 1745 if (val & 0x08) /* fan 9 */ 1746 data->has_fan |= 0x100; 1747 if (val & 0x10) /* fan 10 */ 1748 data->has_fan |= 0x200; 1749 } 1750 if (0x20 == (tmp & 0x30)) { 1751 if (val & 0x20) /* fan 11 */ 1752 data->has_fan |= 0x400; 1753 if (val & 0x40) /* fan 12 */ 1754 data->has_fan |= 0x800; 1755 } 1756 1757 if ((tmp & 0x01) && (val & 0x04)) { /* fan 8, second location */ 1758 data->has_fan |= 0x80; 1759 data->has_pwm |= 0x80; 1760 } 1761 1762 tmp = w83793_read_value(client, W83793_REG_FANIN_SEL); 1763 if ((tmp & 0x01) && (val & 0x08)) { /* fan 9, second location */ 1764 data->has_fan |= 0x100; 1765 } 1766 if ((tmp & 0x02) && (val & 0x10)) { /* fan 10, second location */ 1767 data->has_fan |= 0x200; 1768 } 1769 if ((tmp & 0x04) && (val & 0x20)) { /* fan 11, second location */ 1770 data->has_fan |= 0x400; 1771 } 1772 if ((tmp & 0x08) && (val & 0x40)) { /* fan 12, second location */ 1773 data->has_fan |= 0x800; 1774 } 1775 1776 /* check the temp1-6 mode, ignore former AMDSI selected inputs */ 1777 tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]); 1778 if (tmp & 0x01) 1779 data->has_temp |= 0x01; 1780 if (tmp & 0x04) 1781 data->has_temp |= 0x02; 1782 if (tmp & 0x10) 1783 data->has_temp |= 0x04; 1784 if (tmp & 0x40) 1785 data->has_temp |= 0x08; 1786 1787 tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]); 1788 if (tmp & 0x01) 1789 data->has_temp |= 0x10; 1790 if (tmp & 0x02) 1791 data->has_temp |= 0x20; 1792 1793 /* Register sysfs hooks */ 1794 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) { 1795 err = device_create_file(dev, 1796 &w83793_sensor_attr_2[i].dev_attr); 1797 if (err) 1798 goto exit_remove; 1799 } 1800 1801 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) { 1802 if (!(data->has_vid & (1 << i))) 1803 continue; 1804 err = device_create_file(dev, &w83793_vid[i].dev_attr); 1805 if (err) 1806 goto exit_remove; 1807 } 1808 if (data->has_vid) { 1809 data->vrm = vid_which_vrm(); 1810 err = device_create_file(dev, &dev_attr_vrm); 1811 if (err) 1812 goto exit_remove; 1813 } 1814 1815 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) { 1816 err = device_create_file(dev, &sda_single_files[i].dev_attr); 1817 if (err) 1818 goto exit_remove; 1819 1820 } 1821 1822 for (i = 0; i < 6; i++) { 1823 int j; 1824 if (!(data->has_temp & (1 << i))) 1825 continue; 1826 for (j = 0; j < files_temp; j++) { 1827 err = device_create_file(dev, 1828 &w83793_temp[(i) * files_temp 1829 + j].dev_attr); 1830 if (err) 1831 goto exit_remove; 1832 } 1833 } 1834 1835 for (i = 5; i < 12; i++) { 1836 int j; 1837 if (!(data->has_fan & (1 << i))) 1838 continue; 1839 for (j = 0; j < files_fan; j++) { 1840 err = device_create_file(dev, 1841 &w83793_left_fan[(i - 5) * files_fan 1842 + j].dev_attr); 1843 if (err) 1844 goto exit_remove; 1845 } 1846 } 1847 1848 for (i = 3; i < 8; i++) { 1849 int j; 1850 if (!(data->has_pwm & (1 << i))) 1851 continue; 1852 for (j = 0; j < files_pwm; j++) { 1853 err = device_create_file(dev, 1854 &w83793_left_pwm[(i - 3) * files_pwm 1855 + j].dev_attr); 1856 if (err) 1857 goto exit_remove; 1858 } 1859 } 1860 1861 data->hwmon_dev = hwmon_device_register(dev); 1862 if (IS_ERR(data->hwmon_dev)) { 1863 err = PTR_ERR(data->hwmon_dev); 1864 goto exit_remove; 1865 } 1866 1867 /* Watchdog initialization */ 1868 1869 /* Register boot notifier */ 1870 err = register_reboot_notifier(&watchdog_notifier); 1871 if (err != 0) { 1872 dev_err(&client->dev, 1873 "cannot register reboot notifier (err=%d)\n", err); 1874 goto exit_devunreg; 1875 } 1876 1877 /* 1878 * Enable Watchdog registers. 1879 * Set Configuration Register to Enable Watch Dog Registers 1880 * (Bit 2) = XXXX, X1XX. 1881 */ 1882 tmp = w83793_read_value(client, W83793_REG_CONFIG); 1883 w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04); 1884 1885 /* Set the default watchdog timeout */ 1886 data->watchdog_timeout = timeout; 1887 1888 /* Check, if last reboot was caused by watchdog */ 1889 data->watchdog_caused_reboot = 1890 w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01; 1891 1892 /* Disable Soft Watchdog during initialiation */ 1893 watchdog_disable(data); 1894 1895 /* 1896 * We take the data_mutex lock early so that watchdog_open() cannot 1897 * run when misc_register() has completed, but we've not yet added 1898 * our data to the watchdog_data_list (and set the default timeout) 1899 */ 1900 mutex_lock(&watchdog_data_mutex); 1901 for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) { 1902 /* Register our watchdog part */ 1903 snprintf(data->watchdog_name, sizeof(data->watchdog_name), 1904 "watchdog%c", (i == 0) ? '\0' : ('0' + i)); 1905 data->watchdog_miscdev.name = data->watchdog_name; 1906 data->watchdog_miscdev.fops = &watchdog_fops; 1907 data->watchdog_miscdev.minor = watchdog_minors[i]; 1908 1909 err = misc_register(&data->watchdog_miscdev); 1910 if (err == -EBUSY) 1911 continue; 1912 if (err) { 1913 data->watchdog_miscdev.minor = 0; 1914 dev_err(&client->dev, 1915 "Registering watchdog chardev: %d\n", err); 1916 break; 1917 } 1918 1919 list_add(&data->list, &watchdog_data_list); 1920 1921 dev_info(&client->dev, 1922 "Registered watchdog chardev major 10, minor: %d\n", 1923 watchdog_minors[i]); 1924 break; 1925 } 1926 if (i == ARRAY_SIZE(watchdog_minors)) { 1927 data->watchdog_miscdev.minor = 0; 1928 dev_warn(&client->dev, 1929 "Couldn't register watchdog chardev (due to no free minor)\n"); 1930 } 1931 1932 mutex_unlock(&watchdog_data_mutex); 1933 1934 return 0; 1935 1936 /* Unregister hwmon device */ 1937 1938 exit_devunreg: 1939 1940 hwmon_device_unregister(data->hwmon_dev); 1941 1942 /* Unregister sysfs hooks */ 1943 1944 exit_remove: 1945 for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) 1946 device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr); 1947 1948 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) 1949 device_remove_file(dev, &sda_single_files[i].dev_attr); 1950 1951 for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) 1952 device_remove_file(dev, &w83793_vid[i].dev_attr); 1953 1954 for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++) 1955 device_remove_file(dev, &w83793_left_fan[i].dev_attr); 1956 1957 for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++) 1958 device_remove_file(dev, &w83793_left_pwm[i].dev_attr); 1959 1960 for (i = 0; i < ARRAY_SIZE(w83793_temp); i++) 1961 device_remove_file(dev, &w83793_temp[i].dev_attr); 1962 1963 if (data->lm75[0] != NULL) 1964 i2c_unregister_device(data->lm75[0]); 1965 if (data->lm75[1] != NULL) 1966 i2c_unregister_device(data->lm75[1]); 1967 free_mem: 1968 kfree(data); 1969 exit: 1970 return err; 1971 } 1972 1973 static void w83793_update_nonvolatile(struct device *dev) 1974 { 1975 struct i2c_client *client = to_i2c_client(dev); 1976 struct w83793_data *data = i2c_get_clientdata(client); 1977 int i, j; 1978 /* 1979 * They are somewhat "stable" registers, and to update them every time 1980 * takes so much time, it's just not worthy. Update them in a long 1981 * interval to avoid exception. 1982 */ 1983 if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300) 1984 || !data->valid)) 1985 return; 1986 /* update voltage limits */ 1987 for (i = 1; i < 3; i++) { 1988 for (j = 0; j < ARRAY_SIZE(data->in); j++) { 1989 data->in[j][i] = 1990 w83793_read_value(client, W83793_REG_IN[j][i]); 1991 } 1992 data->in_low_bits[i] = 1993 w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]); 1994 } 1995 1996 for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) { 1997 /* Update the Fan measured value and limits */ 1998 if (!(data->has_fan & (1 << i))) 1999 continue; 2000 data->fan_min[i] = 2001 w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8; 2002 data->fan_min[i] |= 2003 w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1); 2004 } 2005 2006 for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) { 2007 if (!(data->has_temp & (1 << i))) 2008 continue; 2009 data->temp_fan_map[i] = 2010 w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i)); 2011 for (j = 1; j < 5; j++) { 2012 data->temp[i][j] = 2013 w83793_read_value(client, W83793_REG_TEMP[i][j]); 2014 } 2015 data->temp_cruise[i] = 2016 w83793_read_value(client, W83793_REG_TEMP_CRUISE(i)); 2017 for (j = 0; j < 7; j++) { 2018 data->sf2_pwm[i][j] = 2019 w83793_read_value(client, W83793_REG_SF2_PWM(i, j)); 2020 data->sf2_temp[i][j] = 2021 w83793_read_value(client, 2022 W83793_REG_SF2_TEMP(i, j)); 2023 } 2024 } 2025 2026 for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++) 2027 data->temp_mode[i] = 2028 w83793_read_value(client, W83793_REG_TEMP_MODE[i]); 2029 2030 for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) { 2031 data->tolerance[i] = 2032 w83793_read_value(client, W83793_REG_TEMP_TOL(i)); 2033 } 2034 2035 for (i = 0; i < ARRAY_SIZE(data->pwm); i++) { 2036 if (!(data->has_pwm & (1 << i))) 2037 continue; 2038 data->pwm[i][PWM_NONSTOP] = 2039 w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP)); 2040 data->pwm[i][PWM_START] = 2041 w83793_read_value(client, W83793_REG_PWM(i, PWM_START)); 2042 data->pwm_stop_time[i] = 2043 w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i)); 2044 } 2045 2046 data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT); 2047 data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE); 2048 data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME); 2049 data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME); 2050 data->temp_critical = 2051 w83793_read_value(client, W83793_REG_TEMP_CRITICAL); 2052 data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP); 2053 2054 for (i = 0; i < ARRAY_SIZE(data->beeps); i++) 2055 data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i)); 2056 2057 data->last_nonvolatile = jiffies; 2058 } 2059 2060 static struct w83793_data *w83793_update_device(struct device *dev) 2061 { 2062 struct i2c_client *client = to_i2c_client(dev); 2063 struct w83793_data *data = i2c_get_clientdata(client); 2064 int i; 2065 2066 mutex_lock(&data->update_lock); 2067 2068 if (!(time_after(jiffies, data->last_updated + HZ * 2) 2069 || !data->valid)) 2070 goto END; 2071 2072 /* Update the voltages measured value and limits */ 2073 for (i = 0; i < ARRAY_SIZE(data->in); i++) 2074 data->in[i][IN_READ] = 2075 w83793_read_value(client, W83793_REG_IN[i][IN_READ]); 2076 2077 data->in_low_bits[IN_READ] = 2078 w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]); 2079 2080 for (i = 0; i < ARRAY_SIZE(data->fan); i++) { 2081 if (!(data->has_fan & (1 << i))) 2082 continue; 2083 data->fan[i] = 2084 w83793_read_value(client, W83793_REG_FAN(i)) << 8; 2085 data->fan[i] |= 2086 w83793_read_value(client, W83793_REG_FAN(i) + 1); 2087 } 2088 2089 for (i = 0; i < ARRAY_SIZE(data->temp); i++) { 2090 if (!(data->has_temp & (1 << i))) 2091 continue; 2092 data->temp[i][TEMP_READ] = 2093 w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]); 2094 } 2095 2096 data->temp_low_bits = 2097 w83793_read_value(client, W83793_REG_TEMP_LOW_BITS); 2098 2099 for (i = 0; i < ARRAY_SIZE(data->pwm); i++) { 2100 if (data->has_pwm & (1 << i)) 2101 data->pwm[i][PWM_DUTY] = 2102 w83793_read_value(client, 2103 W83793_REG_PWM(i, PWM_DUTY)); 2104 } 2105 2106 for (i = 0; i < ARRAY_SIZE(data->alarms); i++) 2107 data->alarms[i] = 2108 w83793_read_value(client, W83793_REG_ALARM(i)); 2109 if (data->has_vid & 0x01) 2110 data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA); 2111 if (data->has_vid & 0x02) 2112 data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB); 2113 w83793_update_nonvolatile(dev); 2114 data->last_updated = jiffies; 2115 data->valid = 1; 2116 2117 END: 2118 mutex_unlock(&data->update_lock); 2119 return data; 2120 } 2121 2122 /* 2123 * Ignore the possibility that somebody change bank outside the driver 2124 * Must be called with data->update_lock held, except during initialization 2125 */ 2126 static u8 w83793_read_value(struct i2c_client *client, u16 reg) 2127 { 2128 struct w83793_data *data = i2c_get_clientdata(client); 2129 u8 res = 0xff; 2130 u8 new_bank = reg >> 8; 2131 2132 new_bank |= data->bank & 0xfc; 2133 if (data->bank != new_bank) { 2134 if (i2c_smbus_write_byte_data 2135 (client, W83793_REG_BANKSEL, new_bank) >= 0) 2136 data->bank = new_bank; 2137 else { 2138 dev_err(&client->dev, 2139 "set bank to %d failed, fall back " 2140 "to bank %d, read reg 0x%x error\n", 2141 new_bank, data->bank, reg); 2142 res = 0x0; /* read 0x0 from the chip */ 2143 goto END; 2144 } 2145 } 2146 res = i2c_smbus_read_byte_data(client, reg & 0xff); 2147 END: 2148 return res; 2149 } 2150 2151 /* Must be called with data->update_lock held, except during initialization */ 2152 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value) 2153 { 2154 struct w83793_data *data = i2c_get_clientdata(client); 2155 int res; 2156 u8 new_bank = reg >> 8; 2157 2158 new_bank |= data->bank & 0xfc; 2159 if (data->bank != new_bank) { 2160 res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL, 2161 new_bank); 2162 if (res < 0) { 2163 dev_err(&client->dev, 2164 "set bank to %d failed, fall back " 2165 "to bank %d, write reg 0x%x error\n", 2166 new_bank, data->bank, reg); 2167 goto END; 2168 } 2169 data->bank = new_bank; 2170 } 2171 2172 res = i2c_smbus_write_byte_data(client, reg & 0xff, value); 2173 END: 2174 return res; 2175 } 2176 2177 module_i2c_driver(w83793_driver); 2178 2179 MODULE_AUTHOR("Yuan Mu, Sven Anders"); 2180 MODULE_DESCRIPTION("w83793 driver"); 2181 MODULE_LICENSE("GPL"); 2182