1 /* 2 it87.c - Part of lm_sensors, Linux kernel modules for hardware 3 monitoring. 4 5 Supports: IT8705F Super I/O chip w/LPC interface 6 IT8712F Super I/O chip w/LPC interface 7 IT8716F Super I/O chip w/LPC interface 8 IT8718F Super I/O chip w/LPC interface 9 Sis950 A clone of the IT8705F 10 11 Copyright (C) 2001 Chris Gauthron <chrisg@0-in.com> 12 Copyright (C) 2005-2006 Jean Delvare <khali@linux-fr.org> 13 14 This program is free software; you can redistribute it and/or modify 15 it under the terms of the GNU General Public License as published by 16 the Free Software Foundation; either version 2 of the License, or 17 (at your option) any later version. 18 19 This program is distributed in the hope that it will be useful, 20 but WITHOUT ANY WARRANTY; without even the implied warranty of 21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 GNU General Public License for more details. 23 24 You should have received a copy of the GNU General Public License 25 along with this program; if not, write to the Free Software 26 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 27 */ 28 29 #include <linux/module.h> 30 #include <linux/init.h> 31 #include <linux/slab.h> 32 #include <linux/jiffies.h> 33 #include <linux/i2c.h> 34 #include <linux/i2c-isa.h> 35 #include <linux/hwmon.h> 36 #include <linux/hwmon-sysfs.h> 37 #include <linux/hwmon-vid.h> 38 #include <linux/err.h> 39 #include <linux/mutex.h> 40 #include <linux/sysfs.h> 41 #include <asm/io.h> 42 43 44 static unsigned short isa_address; 45 enum chips { it87, it8712, it8716, it8718 }; 46 47 #define REG 0x2e /* The register to read/write */ 48 #define DEV 0x07 /* Register: Logical device select */ 49 #define VAL 0x2f /* The value to read/write */ 50 #define PME 0x04 /* The device with the fan registers in it */ 51 #define GPIO 0x07 /* The device with the IT8718F VID value in it */ 52 #define DEVID 0x20 /* Register: Device ID */ 53 #define DEVREV 0x22 /* Register: Device Revision */ 54 55 static inline int 56 superio_inb(int reg) 57 { 58 outb(reg, REG); 59 return inb(VAL); 60 } 61 62 static int superio_inw(int reg) 63 { 64 int val; 65 outb(reg++, REG); 66 val = inb(VAL) << 8; 67 outb(reg, REG); 68 val |= inb(VAL); 69 return val; 70 } 71 72 static inline void 73 superio_select(int ldn) 74 { 75 outb(DEV, REG); 76 outb(ldn, VAL); 77 } 78 79 static inline void 80 superio_enter(void) 81 { 82 outb(0x87, REG); 83 outb(0x01, REG); 84 outb(0x55, REG); 85 outb(0x55, REG); 86 } 87 88 static inline void 89 superio_exit(void) 90 { 91 outb(0x02, REG); 92 outb(0x02, VAL); 93 } 94 95 /* Logical device 4 registers */ 96 #define IT8712F_DEVID 0x8712 97 #define IT8705F_DEVID 0x8705 98 #define IT8716F_DEVID 0x8716 99 #define IT8718F_DEVID 0x8718 100 #define IT87_ACT_REG 0x30 101 #define IT87_BASE_REG 0x60 102 103 /* Logical device 7 registers (IT8712F and later) */ 104 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */ 105 #define IT87_SIO_VID_REG 0xfc /* VID value */ 106 107 /* Update battery voltage after every reading if true */ 108 static int update_vbat; 109 110 /* Not all BIOSes properly configure the PWM registers */ 111 static int fix_pwm_polarity; 112 113 /* Values read from Super-I/O config space */ 114 static u16 chip_type; 115 static u8 vid_value; 116 117 /* Many IT87 constants specified below */ 118 119 /* Length of ISA address segment */ 120 #define IT87_EXTENT 8 121 122 /* Where are the ISA address/data registers relative to the base address */ 123 #define IT87_ADDR_REG_OFFSET 5 124 #define IT87_DATA_REG_OFFSET 6 125 126 /*----- The IT87 registers -----*/ 127 128 #define IT87_REG_CONFIG 0x00 129 130 #define IT87_REG_ALARM1 0x01 131 #define IT87_REG_ALARM2 0x02 132 #define IT87_REG_ALARM3 0x03 133 134 /* The IT8718F has the VID value in a different register, in Super-I/O 135 configuration space. */ 136 #define IT87_REG_VID 0x0a 137 /* Warning: register 0x0b is used for something completely different in 138 new chips/revisions. I suspect only 16-bit tachometer mode will work 139 for these. */ 140 #define IT87_REG_FAN_DIV 0x0b 141 #define IT87_REG_FAN_16BIT 0x0c 142 143 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */ 144 145 #define IT87_REG_FAN(nr) (0x0d + (nr)) 146 #define IT87_REG_FAN_MIN(nr) (0x10 + (nr)) 147 #define IT87_REG_FANX(nr) (0x18 + (nr)) 148 #define IT87_REG_FANX_MIN(nr) (0x1b + (nr)) 149 #define IT87_REG_FAN_MAIN_CTRL 0x13 150 #define IT87_REG_FAN_CTL 0x14 151 #define IT87_REG_PWM(nr) (0x15 + (nr)) 152 153 #define IT87_REG_VIN(nr) (0x20 + (nr)) 154 #define IT87_REG_TEMP(nr) (0x29 + (nr)) 155 156 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2) 157 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2) 158 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2) 159 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2) 160 161 #define IT87_REG_VIN_ENABLE 0x50 162 #define IT87_REG_TEMP_ENABLE 0x51 163 164 #define IT87_REG_CHIPID 0x58 165 166 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255)) 167 #define IN_FROM_REG(val) ((val) * 16) 168 169 static inline u8 FAN_TO_REG(long rpm, int div) 170 { 171 if (rpm == 0) 172 return 255; 173 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 174 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 175 254); 176 } 177 178 static inline u16 FAN16_TO_REG(long rpm) 179 { 180 if (rpm == 0) 181 return 0xffff; 182 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe); 183 } 184 185 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div))) 186 /* The divider is fixed to 2 in 16-bit mode */ 187 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2)) 188 189 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\ 190 ((val)+500)/1000),-128,127)) 191 #define TEMP_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000) 192 193 #define PWM_TO_REG(val) ((val) >> 1) 194 #define PWM_FROM_REG(val) (((val)&0x7f) << 1) 195 196 static int DIV_TO_REG(int val) 197 { 198 int answer = 0; 199 while (answer < 7 && (val >>= 1)) 200 answer++; 201 return answer; 202 } 203 #define DIV_FROM_REG(val) (1 << (val)) 204 205 206 /* For each registered IT87, we need to keep some data in memory. That 207 data is pointed to by it87_list[NR]->data. The structure itself is 208 dynamically allocated, at the same time when a new it87 client is 209 allocated. */ 210 struct it87_data { 211 struct i2c_client client; 212 struct class_device *class_dev; 213 struct mutex lock; 214 enum chips type; 215 216 struct mutex update_lock; 217 char valid; /* !=0 if following fields are valid */ 218 unsigned long last_updated; /* In jiffies */ 219 220 u8 in[9]; /* Register value */ 221 u8 in_max[8]; /* Register value */ 222 u8 in_min[8]; /* Register value */ 223 u8 has_fan; /* Bitfield, fans enabled */ 224 u16 fan[3]; /* Register values, possibly combined */ 225 u16 fan_min[3]; /* Register values, possibly combined */ 226 u8 temp[3]; /* Register value */ 227 u8 temp_high[3]; /* Register value */ 228 u8 temp_low[3]; /* Register value */ 229 u8 sensor; /* Register value */ 230 u8 fan_div[3]; /* Register encoding, shifted right */ 231 u8 vid; /* Register encoding, combined */ 232 u8 vrm; 233 u32 alarms; /* Register encoding, combined */ 234 u8 fan_main_ctrl; /* Register value */ 235 u8 manual_pwm_ctl[3]; /* manual PWM value set by user */ 236 }; 237 238 239 static int it87_detect(struct i2c_adapter *adapter); 240 static int it87_detach_client(struct i2c_client *client); 241 242 static int it87_read_value(struct i2c_client *client, u8 reg); 243 static void it87_write_value(struct i2c_client *client, u8 reg, u8 value); 244 static struct it87_data *it87_update_device(struct device *dev); 245 static int it87_check_pwm(struct i2c_client *client); 246 static void it87_init_client(struct i2c_client *client, struct it87_data *data); 247 248 249 static struct i2c_driver it87_isa_driver = { 250 .driver = { 251 .owner = THIS_MODULE, 252 .name = "it87-isa", 253 }, 254 .attach_adapter = it87_detect, 255 .detach_client = it87_detach_client, 256 }; 257 258 259 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 260 char *buf) 261 { 262 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 263 int nr = sensor_attr->index; 264 265 struct it87_data *data = it87_update_device(dev); 266 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); 267 } 268 269 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 270 char *buf) 271 { 272 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 273 int nr = sensor_attr->index; 274 275 struct it87_data *data = it87_update_device(dev); 276 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); 277 } 278 279 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 280 char *buf) 281 { 282 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 283 int nr = sensor_attr->index; 284 285 struct it87_data *data = it87_update_device(dev); 286 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); 287 } 288 289 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 290 const char *buf, size_t count) 291 { 292 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 293 int nr = sensor_attr->index; 294 295 struct i2c_client *client = to_i2c_client(dev); 296 struct it87_data *data = i2c_get_clientdata(client); 297 unsigned long val = simple_strtoul(buf, NULL, 10); 298 299 mutex_lock(&data->update_lock); 300 data->in_min[nr] = IN_TO_REG(val); 301 it87_write_value(client, IT87_REG_VIN_MIN(nr), 302 data->in_min[nr]); 303 mutex_unlock(&data->update_lock); 304 return count; 305 } 306 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 307 const char *buf, size_t count) 308 { 309 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 310 int nr = sensor_attr->index; 311 312 struct i2c_client *client = to_i2c_client(dev); 313 struct it87_data *data = i2c_get_clientdata(client); 314 unsigned long val = simple_strtoul(buf, NULL, 10); 315 316 mutex_lock(&data->update_lock); 317 data->in_max[nr] = IN_TO_REG(val); 318 it87_write_value(client, IT87_REG_VIN_MAX(nr), 319 data->in_max[nr]); 320 mutex_unlock(&data->update_lock); 321 return count; 322 } 323 324 #define show_in_offset(offset) \ 325 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 326 show_in, NULL, offset); 327 328 #define limit_in_offset(offset) \ 329 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 330 show_in_min, set_in_min, offset); \ 331 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 332 show_in_max, set_in_max, offset); 333 334 show_in_offset(0); 335 limit_in_offset(0); 336 show_in_offset(1); 337 limit_in_offset(1); 338 show_in_offset(2); 339 limit_in_offset(2); 340 show_in_offset(3); 341 limit_in_offset(3); 342 show_in_offset(4); 343 limit_in_offset(4); 344 show_in_offset(5); 345 limit_in_offset(5); 346 show_in_offset(6); 347 limit_in_offset(6); 348 show_in_offset(7); 349 limit_in_offset(7); 350 show_in_offset(8); 351 352 /* 3 temperatures */ 353 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 354 char *buf) 355 { 356 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 357 int nr = sensor_attr->index; 358 359 struct it87_data *data = it87_update_device(dev); 360 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 361 } 362 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 363 char *buf) 364 { 365 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 366 int nr = sensor_attr->index; 367 368 struct it87_data *data = it87_update_device(dev); 369 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); 370 } 371 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 372 char *buf) 373 { 374 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 375 int nr = sensor_attr->index; 376 377 struct it87_data *data = it87_update_device(dev); 378 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); 379 } 380 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 381 const char *buf, size_t count) 382 { 383 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 384 int nr = sensor_attr->index; 385 386 struct i2c_client *client = to_i2c_client(dev); 387 struct it87_data *data = i2c_get_clientdata(client); 388 int val = simple_strtol(buf, NULL, 10); 389 390 mutex_lock(&data->update_lock); 391 data->temp_high[nr] = TEMP_TO_REG(val); 392 it87_write_value(client, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); 393 mutex_unlock(&data->update_lock); 394 return count; 395 } 396 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 397 const char *buf, size_t count) 398 { 399 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 400 int nr = sensor_attr->index; 401 402 struct i2c_client *client = to_i2c_client(dev); 403 struct it87_data *data = i2c_get_clientdata(client); 404 int val = simple_strtol(buf, NULL, 10); 405 406 mutex_lock(&data->update_lock); 407 data->temp_low[nr] = TEMP_TO_REG(val); 408 it87_write_value(client, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); 409 mutex_unlock(&data->update_lock); 410 return count; 411 } 412 #define show_temp_offset(offset) \ 413 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 414 show_temp, NULL, offset - 1); \ 415 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 416 show_temp_max, set_temp_max, offset - 1); \ 417 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 418 show_temp_min, set_temp_min, offset - 1); 419 420 show_temp_offset(1); 421 show_temp_offset(2); 422 show_temp_offset(3); 423 424 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, 425 char *buf) 426 { 427 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 428 int nr = sensor_attr->index; 429 430 struct it87_data *data = it87_update_device(dev); 431 u8 reg = data->sensor; /* In case the value is updated while we use it */ 432 433 if (reg & (1 << nr)) 434 return sprintf(buf, "3\n"); /* thermal diode */ 435 if (reg & (8 << nr)) 436 return sprintf(buf, "2\n"); /* thermistor */ 437 return sprintf(buf, "0\n"); /* disabled */ 438 } 439 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, 440 const char *buf, size_t count) 441 { 442 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 443 int nr = sensor_attr->index; 444 445 struct i2c_client *client = to_i2c_client(dev); 446 struct it87_data *data = i2c_get_clientdata(client); 447 int val = simple_strtol(buf, NULL, 10); 448 449 mutex_lock(&data->update_lock); 450 451 data->sensor &= ~(1 << nr); 452 data->sensor &= ~(8 << nr); 453 /* 3 = thermal diode; 2 = thermistor; 0 = disabled */ 454 if (val == 3) 455 data->sensor |= 1 << nr; 456 else if (val == 2) 457 data->sensor |= 8 << nr; 458 else if (val != 0) { 459 mutex_unlock(&data->update_lock); 460 return -EINVAL; 461 } 462 it87_write_value(client, IT87_REG_TEMP_ENABLE, data->sensor); 463 mutex_unlock(&data->update_lock); 464 return count; 465 } 466 #define show_sensor_offset(offset) \ 467 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ 468 show_sensor, set_sensor, offset - 1); 469 470 show_sensor_offset(1); 471 show_sensor_offset(2); 472 show_sensor_offset(3); 473 474 /* 3 Fans */ 475 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 476 char *buf) 477 { 478 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 479 int nr = sensor_attr->index; 480 481 struct it87_data *data = it87_update_device(dev); 482 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr], 483 DIV_FROM_REG(data->fan_div[nr]))); 484 } 485 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 486 char *buf) 487 { 488 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 489 int nr = sensor_attr->index; 490 491 struct it87_data *data = it87_update_device(dev); 492 return sprintf(buf,"%d\n", 493 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]))); 494 } 495 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 496 char *buf) 497 { 498 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 499 int nr = sensor_attr->index; 500 501 struct it87_data *data = it87_update_device(dev); 502 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 503 } 504 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr, 505 char *buf) 506 { 507 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 508 int nr = sensor_attr->index; 509 510 struct it87_data *data = it87_update_device(dev); 511 return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0); 512 } 513 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 514 char *buf) 515 { 516 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 517 int nr = sensor_attr->index; 518 519 struct it87_data *data = it87_update_device(dev); 520 return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]); 521 } 522 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 523 const char *buf, size_t count) 524 { 525 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 526 int nr = sensor_attr->index; 527 528 struct i2c_client *client = to_i2c_client(dev); 529 struct it87_data *data = i2c_get_clientdata(client); 530 int val = simple_strtol(buf, NULL, 10); 531 u8 reg = it87_read_value(client, IT87_REG_FAN_DIV); 532 533 mutex_lock(&data->update_lock); 534 switch (nr) { 535 case 0: data->fan_div[nr] = reg & 0x07; break; 536 case 1: data->fan_div[nr] = (reg >> 3) & 0x07; break; 537 case 2: data->fan_div[nr] = (reg & 0x40) ? 3 : 1; break; 538 } 539 540 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 541 it87_write_value(client, IT87_REG_FAN_MIN(nr), data->fan_min[nr]); 542 mutex_unlock(&data->update_lock); 543 return count; 544 } 545 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 546 const char *buf, size_t count) 547 { 548 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 549 int nr = sensor_attr->index; 550 551 struct i2c_client *client = to_i2c_client(dev); 552 struct it87_data *data = i2c_get_clientdata(client); 553 unsigned long val = simple_strtoul(buf, NULL, 10); 554 int min; 555 u8 old; 556 557 mutex_lock(&data->update_lock); 558 old = it87_read_value(client, IT87_REG_FAN_DIV); 559 560 /* Save fan min limit */ 561 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 562 563 switch (nr) { 564 case 0: 565 case 1: 566 data->fan_div[nr] = DIV_TO_REG(val); 567 break; 568 case 2: 569 if (val < 8) 570 data->fan_div[nr] = 1; 571 else 572 data->fan_div[nr] = 3; 573 } 574 val = old & 0x80; 575 val |= (data->fan_div[0] & 0x07); 576 val |= (data->fan_div[1] & 0x07) << 3; 577 if (data->fan_div[2] == 3) 578 val |= 0x1 << 6; 579 it87_write_value(client, IT87_REG_FAN_DIV, val); 580 581 /* Restore fan min limit */ 582 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 583 it87_write_value(client, IT87_REG_FAN_MIN(nr), data->fan_min[nr]); 584 585 mutex_unlock(&data->update_lock); 586 return count; 587 } 588 static ssize_t set_pwm_enable(struct device *dev, 589 struct device_attribute *attr, const char *buf, size_t count) 590 { 591 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 592 int nr = sensor_attr->index; 593 594 struct i2c_client *client = to_i2c_client(dev); 595 struct it87_data *data = i2c_get_clientdata(client); 596 int val = simple_strtol(buf, NULL, 10); 597 598 mutex_lock(&data->update_lock); 599 600 if (val == 0) { 601 int tmp; 602 /* make sure the fan is on when in on/off mode */ 603 tmp = it87_read_value(client, IT87_REG_FAN_CTL); 604 it87_write_value(client, IT87_REG_FAN_CTL, tmp | (1 << nr)); 605 /* set on/off mode */ 606 data->fan_main_ctrl &= ~(1 << nr); 607 it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 608 } else if (val == 1) { 609 /* set SmartGuardian mode */ 610 data->fan_main_ctrl |= (1 << nr); 611 it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 612 /* set saved pwm value, clear FAN_CTLX PWM mode bit */ 613 it87_write_value(client, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); 614 } else { 615 mutex_unlock(&data->update_lock); 616 return -EINVAL; 617 } 618 619 mutex_unlock(&data->update_lock); 620 return count; 621 } 622 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 623 const char *buf, size_t count) 624 { 625 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 626 int nr = sensor_attr->index; 627 628 struct i2c_client *client = to_i2c_client(dev); 629 struct it87_data *data = i2c_get_clientdata(client); 630 int val = simple_strtol(buf, NULL, 10); 631 632 if (val < 0 || val > 255) 633 return -EINVAL; 634 635 mutex_lock(&data->update_lock); 636 data->manual_pwm_ctl[nr] = val; 637 if (data->fan_main_ctrl & (1 << nr)) 638 it87_write_value(client, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); 639 mutex_unlock(&data->update_lock); 640 return count; 641 } 642 643 #define show_fan_offset(offset) \ 644 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 645 show_fan, NULL, offset - 1); \ 646 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 647 show_fan_min, set_fan_min, offset - 1); \ 648 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 649 show_fan_div, set_fan_div, offset - 1); 650 651 show_fan_offset(1); 652 show_fan_offset(2); 653 show_fan_offset(3); 654 655 #define show_pwm_offset(offset) \ 656 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 657 show_pwm_enable, set_pwm_enable, offset - 1); \ 658 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 659 show_pwm, set_pwm, offset - 1); 660 661 show_pwm_offset(1); 662 show_pwm_offset(2); 663 show_pwm_offset(3); 664 665 /* A different set of callbacks for 16-bit fans */ 666 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr, 667 char *buf) 668 { 669 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 670 int nr = sensor_attr->index; 671 struct it87_data *data = it87_update_device(dev); 672 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr])); 673 } 674 675 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr, 676 char *buf) 677 { 678 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 679 int nr = sensor_attr->index; 680 struct it87_data *data = it87_update_device(dev); 681 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr])); 682 } 683 684 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr, 685 const char *buf, size_t count) 686 { 687 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 688 int nr = sensor_attr->index; 689 struct i2c_client *client = to_i2c_client(dev); 690 struct it87_data *data = i2c_get_clientdata(client); 691 int val = simple_strtol(buf, NULL, 10); 692 693 mutex_lock(&data->update_lock); 694 data->fan_min[nr] = FAN16_TO_REG(val); 695 it87_write_value(client, IT87_REG_FAN_MIN(nr), 696 data->fan_min[nr] & 0xff); 697 it87_write_value(client, IT87_REG_FANX_MIN(nr), 698 data->fan_min[nr] >> 8); 699 mutex_unlock(&data->update_lock); 700 return count; 701 } 702 703 /* We want to use the same sysfs file names as 8-bit fans, but we need 704 different variable names, so we have to use SENSOR_ATTR instead of 705 SENSOR_DEVICE_ATTR. */ 706 #define show_fan16_offset(offset) \ 707 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \ 708 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \ 709 show_fan16, NULL, offset - 1); \ 710 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \ 711 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 712 show_fan16_min, set_fan16_min, offset - 1) 713 714 show_fan16_offset(1); 715 show_fan16_offset(2); 716 show_fan16_offset(3); 717 718 /* Alarms */ 719 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 720 { 721 struct it87_data *data = it87_update_device(dev); 722 return sprintf(buf, "%u\n", data->alarms); 723 } 724 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 725 726 static ssize_t 727 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf) 728 { 729 struct it87_data *data = it87_update_device(dev); 730 return sprintf(buf, "%u\n", data->vrm); 731 } 732 static ssize_t 733 store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 734 { 735 struct i2c_client *client = to_i2c_client(dev); 736 struct it87_data *data = i2c_get_clientdata(client); 737 u32 val; 738 739 val = simple_strtoul(buf, NULL, 10); 740 data->vrm = val; 741 742 return count; 743 } 744 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 745 746 static ssize_t 747 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf) 748 { 749 struct it87_data *data = it87_update_device(dev); 750 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 751 } 752 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 753 754 static struct attribute *it87_attributes[] = { 755 &sensor_dev_attr_in0_input.dev_attr.attr, 756 &sensor_dev_attr_in1_input.dev_attr.attr, 757 &sensor_dev_attr_in2_input.dev_attr.attr, 758 &sensor_dev_attr_in3_input.dev_attr.attr, 759 &sensor_dev_attr_in4_input.dev_attr.attr, 760 &sensor_dev_attr_in5_input.dev_attr.attr, 761 &sensor_dev_attr_in6_input.dev_attr.attr, 762 &sensor_dev_attr_in7_input.dev_attr.attr, 763 &sensor_dev_attr_in8_input.dev_attr.attr, 764 &sensor_dev_attr_in0_min.dev_attr.attr, 765 &sensor_dev_attr_in1_min.dev_attr.attr, 766 &sensor_dev_attr_in2_min.dev_attr.attr, 767 &sensor_dev_attr_in3_min.dev_attr.attr, 768 &sensor_dev_attr_in4_min.dev_attr.attr, 769 &sensor_dev_attr_in5_min.dev_attr.attr, 770 &sensor_dev_attr_in6_min.dev_attr.attr, 771 &sensor_dev_attr_in7_min.dev_attr.attr, 772 &sensor_dev_attr_in0_max.dev_attr.attr, 773 &sensor_dev_attr_in1_max.dev_attr.attr, 774 &sensor_dev_attr_in2_max.dev_attr.attr, 775 &sensor_dev_attr_in3_max.dev_attr.attr, 776 &sensor_dev_attr_in4_max.dev_attr.attr, 777 &sensor_dev_attr_in5_max.dev_attr.attr, 778 &sensor_dev_attr_in6_max.dev_attr.attr, 779 &sensor_dev_attr_in7_max.dev_attr.attr, 780 781 &sensor_dev_attr_temp1_input.dev_attr.attr, 782 &sensor_dev_attr_temp2_input.dev_attr.attr, 783 &sensor_dev_attr_temp3_input.dev_attr.attr, 784 &sensor_dev_attr_temp1_max.dev_attr.attr, 785 &sensor_dev_attr_temp2_max.dev_attr.attr, 786 &sensor_dev_attr_temp3_max.dev_attr.attr, 787 &sensor_dev_attr_temp1_min.dev_attr.attr, 788 &sensor_dev_attr_temp2_min.dev_attr.attr, 789 &sensor_dev_attr_temp3_min.dev_attr.attr, 790 &sensor_dev_attr_temp1_type.dev_attr.attr, 791 &sensor_dev_attr_temp2_type.dev_attr.attr, 792 &sensor_dev_attr_temp3_type.dev_attr.attr, 793 794 &dev_attr_alarms.attr, 795 NULL 796 }; 797 798 static const struct attribute_group it87_group = { 799 .attrs = it87_attributes, 800 }; 801 802 static struct attribute *it87_attributes_opt[] = { 803 &sensor_dev_attr_fan1_input16.dev_attr.attr, 804 &sensor_dev_attr_fan1_min16.dev_attr.attr, 805 &sensor_dev_attr_fan2_input16.dev_attr.attr, 806 &sensor_dev_attr_fan2_min16.dev_attr.attr, 807 &sensor_dev_attr_fan3_input16.dev_attr.attr, 808 &sensor_dev_attr_fan3_min16.dev_attr.attr, 809 810 &sensor_dev_attr_fan1_input.dev_attr.attr, 811 &sensor_dev_attr_fan1_min.dev_attr.attr, 812 &sensor_dev_attr_fan1_div.dev_attr.attr, 813 &sensor_dev_attr_fan2_input.dev_attr.attr, 814 &sensor_dev_attr_fan2_min.dev_attr.attr, 815 &sensor_dev_attr_fan2_div.dev_attr.attr, 816 &sensor_dev_attr_fan3_input.dev_attr.attr, 817 &sensor_dev_attr_fan3_min.dev_attr.attr, 818 &sensor_dev_attr_fan3_div.dev_attr.attr, 819 820 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 821 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 822 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 823 &sensor_dev_attr_pwm1.dev_attr.attr, 824 &sensor_dev_attr_pwm2.dev_attr.attr, 825 &sensor_dev_attr_pwm3.dev_attr.attr, 826 827 &dev_attr_vrm.attr, 828 &dev_attr_cpu0_vid.attr, 829 NULL 830 }; 831 832 static const struct attribute_group it87_group_opt = { 833 .attrs = it87_attributes_opt, 834 }; 835 836 /* SuperIO detection - will change isa_address if a chip is found */ 837 static int __init it87_find(unsigned short *address) 838 { 839 int err = -ENODEV; 840 841 superio_enter(); 842 chip_type = superio_inw(DEVID); 843 if (chip_type != IT8712F_DEVID 844 && chip_type != IT8716F_DEVID 845 && chip_type != IT8718F_DEVID 846 && chip_type != IT8705F_DEVID) 847 goto exit; 848 849 superio_select(PME); 850 if (!(superio_inb(IT87_ACT_REG) & 0x01)) { 851 pr_info("it87: Device not activated, skipping\n"); 852 goto exit; 853 } 854 855 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); 856 if (*address == 0) { 857 pr_info("it87: Base address not set, skipping\n"); 858 goto exit; 859 } 860 861 err = 0; 862 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n", 863 chip_type, *address, superio_inb(DEVREV) & 0x0f); 864 865 /* Read GPIO config and VID value from LDN 7 (GPIO) */ 866 if (chip_type != IT8705F_DEVID) { 867 int reg; 868 869 superio_select(GPIO); 870 if (chip_type == it8718) 871 vid_value = superio_inb(IT87_SIO_VID_REG); 872 873 reg = superio_inb(IT87_SIO_PINX2_REG); 874 if (reg & (1 << 0)) 875 pr_info("it87: in3 is VCC (+5V)\n"); 876 if (reg & (1 << 1)) 877 pr_info("it87: in7 is VCCH (+5V Stand-By)\n"); 878 } 879 880 exit: 881 superio_exit(); 882 return err; 883 } 884 885 /* This function is called by i2c_probe */ 886 static int it87_detect(struct i2c_adapter *adapter) 887 { 888 struct i2c_client *new_client; 889 struct it87_data *data; 890 int err = 0; 891 const char *name; 892 int enable_pwm_interface; 893 894 /* Reserve the ISA region */ 895 if (!request_region(isa_address, IT87_EXTENT, 896 it87_isa_driver.driver.name)){ 897 err = -EBUSY; 898 goto ERROR0; 899 } 900 901 if (!(data = kzalloc(sizeof(struct it87_data), GFP_KERNEL))) { 902 err = -ENOMEM; 903 goto ERROR1; 904 } 905 906 new_client = &data->client; 907 mutex_init(&data->lock); 908 i2c_set_clientdata(new_client, data); 909 new_client->addr = isa_address; 910 new_client->adapter = adapter; 911 new_client->driver = &it87_isa_driver; 912 913 /* Now, we do the remaining detection. */ 914 if ((it87_read_value(new_client, IT87_REG_CONFIG) & 0x80) 915 || it87_read_value(new_client, IT87_REG_CHIPID) != 0x90) { 916 err = -ENODEV; 917 goto ERROR2; 918 } 919 920 /* Determine the chip type. */ 921 switch (chip_type) { 922 case IT8712F_DEVID: 923 data->type = it8712; 924 name = "it8712"; 925 break; 926 case IT8716F_DEVID: 927 data->type = it8716; 928 name = "it8716"; 929 break; 930 case IT8718F_DEVID: 931 data->type = it8718; 932 name = "it8718"; 933 break; 934 default: 935 data->type = it87; 936 name = "it87"; 937 } 938 939 /* Fill in the remaining client fields and put it into the global list */ 940 strlcpy(new_client->name, name, I2C_NAME_SIZE); 941 mutex_init(&data->update_lock); 942 943 /* Tell the I2C layer a new client has arrived */ 944 if ((err = i2c_attach_client(new_client))) 945 goto ERROR2; 946 947 /* Check PWM configuration */ 948 enable_pwm_interface = it87_check_pwm(new_client); 949 950 /* Initialize the IT87 chip */ 951 it87_init_client(new_client, data); 952 953 /* Register sysfs hooks */ 954 if ((err = sysfs_create_group(&new_client->dev.kobj, &it87_group))) 955 goto ERROR3; 956 957 /* Do not create fan files for disabled fans */ 958 if (data->type == it8716 || data->type == it8718) { 959 /* 16-bit tachometers */ 960 if (data->has_fan & (1 << 0)) { 961 if ((err = device_create_file(&new_client->dev, 962 &sensor_dev_attr_fan1_input16.dev_attr)) 963 || (err = device_create_file(&new_client->dev, 964 &sensor_dev_attr_fan1_min16.dev_attr))) 965 goto ERROR4; 966 } 967 if (data->has_fan & (1 << 1)) { 968 if ((err = device_create_file(&new_client->dev, 969 &sensor_dev_attr_fan2_input16.dev_attr)) 970 || (err = device_create_file(&new_client->dev, 971 &sensor_dev_attr_fan2_min16.dev_attr))) 972 goto ERROR4; 973 } 974 if (data->has_fan & (1 << 2)) { 975 if ((err = device_create_file(&new_client->dev, 976 &sensor_dev_attr_fan3_input16.dev_attr)) 977 || (err = device_create_file(&new_client->dev, 978 &sensor_dev_attr_fan3_min16.dev_attr))) 979 goto ERROR4; 980 } 981 } else { 982 /* 8-bit tachometers with clock divider */ 983 if (data->has_fan & (1 << 0)) { 984 if ((err = device_create_file(&new_client->dev, 985 &sensor_dev_attr_fan1_input.dev_attr)) 986 || (err = device_create_file(&new_client->dev, 987 &sensor_dev_attr_fan1_min.dev_attr)) 988 || (err = device_create_file(&new_client->dev, 989 &sensor_dev_attr_fan1_div.dev_attr))) 990 goto ERROR4; 991 } 992 if (data->has_fan & (1 << 1)) { 993 if ((err = device_create_file(&new_client->dev, 994 &sensor_dev_attr_fan2_input.dev_attr)) 995 || (err = device_create_file(&new_client->dev, 996 &sensor_dev_attr_fan2_min.dev_attr)) 997 || (err = device_create_file(&new_client->dev, 998 &sensor_dev_attr_fan2_div.dev_attr))) 999 goto ERROR4; 1000 } 1001 if (data->has_fan & (1 << 2)) { 1002 if ((err = device_create_file(&new_client->dev, 1003 &sensor_dev_attr_fan3_input.dev_attr)) 1004 || (err = device_create_file(&new_client->dev, 1005 &sensor_dev_attr_fan3_min.dev_attr)) 1006 || (err = device_create_file(&new_client->dev, 1007 &sensor_dev_attr_fan3_div.dev_attr))) 1008 goto ERROR4; 1009 } 1010 } 1011 1012 if (enable_pwm_interface) { 1013 if ((err = device_create_file(&new_client->dev, 1014 &sensor_dev_attr_pwm1_enable.dev_attr)) 1015 || (err = device_create_file(&new_client->dev, 1016 &sensor_dev_attr_pwm2_enable.dev_attr)) 1017 || (err = device_create_file(&new_client->dev, 1018 &sensor_dev_attr_pwm3_enable.dev_attr)) 1019 || (err = device_create_file(&new_client->dev, 1020 &sensor_dev_attr_pwm1.dev_attr)) 1021 || (err = device_create_file(&new_client->dev, 1022 &sensor_dev_attr_pwm2.dev_attr)) 1023 || (err = device_create_file(&new_client->dev, 1024 &sensor_dev_attr_pwm3.dev_attr))) 1025 goto ERROR4; 1026 } 1027 1028 if (data->type == it8712 || data->type == it8716 1029 || data->type == it8718) { 1030 data->vrm = vid_which_vrm(); 1031 /* VID reading from Super-I/O config space if available */ 1032 data->vid = vid_value; 1033 if ((err = device_create_file(&new_client->dev, 1034 &dev_attr_vrm)) 1035 || (err = device_create_file(&new_client->dev, 1036 &dev_attr_cpu0_vid))) 1037 goto ERROR4; 1038 } 1039 1040 data->class_dev = hwmon_device_register(&new_client->dev); 1041 if (IS_ERR(data->class_dev)) { 1042 err = PTR_ERR(data->class_dev); 1043 goto ERROR4; 1044 } 1045 1046 return 0; 1047 1048 ERROR4: 1049 sysfs_remove_group(&new_client->dev.kobj, &it87_group); 1050 sysfs_remove_group(&new_client->dev.kobj, &it87_group_opt); 1051 ERROR3: 1052 i2c_detach_client(new_client); 1053 ERROR2: 1054 kfree(data); 1055 ERROR1: 1056 release_region(isa_address, IT87_EXTENT); 1057 ERROR0: 1058 return err; 1059 } 1060 1061 static int it87_detach_client(struct i2c_client *client) 1062 { 1063 struct it87_data *data = i2c_get_clientdata(client); 1064 int err; 1065 1066 hwmon_device_unregister(data->class_dev); 1067 sysfs_remove_group(&client->dev.kobj, &it87_group); 1068 sysfs_remove_group(&client->dev.kobj, &it87_group_opt); 1069 1070 if ((err = i2c_detach_client(client))) 1071 return err; 1072 1073 release_region(client->addr, IT87_EXTENT); 1074 kfree(data); 1075 1076 return 0; 1077 } 1078 1079 /* ISA access must be locked explicitly! 1080 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1081 would slow down the IT87 access and should not be necessary. */ 1082 static int it87_read_value(struct i2c_client *client, u8 reg) 1083 { 1084 struct it87_data *data = i2c_get_clientdata(client); 1085 int res; 1086 1087 mutex_lock(&data->lock); 1088 outb_p(reg, client->addr + IT87_ADDR_REG_OFFSET); 1089 res = inb_p(client->addr + IT87_DATA_REG_OFFSET); 1090 mutex_unlock(&data->lock); 1091 1092 return res; 1093 } 1094 1095 /* ISA access must be locked explicitly! 1096 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1097 would slow down the IT87 access and should not be necessary. */ 1098 static void it87_write_value(struct i2c_client *client, u8 reg, u8 value) 1099 { 1100 struct it87_data *data = i2c_get_clientdata(client); 1101 1102 mutex_lock(&data->lock); 1103 outb_p(reg, client->addr + IT87_ADDR_REG_OFFSET); 1104 outb_p(value, client->addr + IT87_DATA_REG_OFFSET); 1105 mutex_unlock(&data->lock); 1106 } 1107 1108 /* Return 1 if and only if the PWM interface is safe to use */ 1109 static int it87_check_pwm(struct i2c_client *client) 1110 { 1111 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off 1112 * and polarity set to active low is sign that this is the case so we 1113 * disable pwm control to protect the user. */ 1114 int tmp = it87_read_value(client, IT87_REG_FAN_CTL); 1115 if ((tmp & 0x87) == 0) { 1116 if (fix_pwm_polarity) { 1117 /* The user asks us to attempt a chip reconfiguration. 1118 * This means switching to active high polarity and 1119 * inverting all fan speed values. */ 1120 int i; 1121 u8 pwm[3]; 1122 1123 for (i = 0; i < 3; i++) 1124 pwm[i] = it87_read_value(client, 1125 IT87_REG_PWM(i)); 1126 1127 /* If any fan is in automatic pwm mode, the polarity 1128 * might be correct, as suspicious as it seems, so we 1129 * better don't change anything (but still disable the 1130 * PWM interface). */ 1131 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) { 1132 dev_info(&client->dev, "Reconfiguring PWM to " 1133 "active high polarity\n"); 1134 it87_write_value(client, IT87_REG_FAN_CTL, 1135 tmp | 0x87); 1136 for (i = 0; i < 3; i++) 1137 it87_write_value(client, 1138 IT87_REG_PWM(i), 1139 0x7f & ~pwm[i]); 1140 return 1; 1141 } 1142 1143 dev_info(&client->dev, "PWM configuration is " 1144 "too broken to be fixed\n"); 1145 } 1146 1147 dev_info(&client->dev, "Detected broken BIOS " 1148 "defaults, disabling PWM interface\n"); 1149 return 0; 1150 } else if (fix_pwm_polarity) { 1151 dev_info(&client->dev, "PWM configuration looks " 1152 "sane, won't touch\n"); 1153 } 1154 1155 return 1; 1156 } 1157 1158 /* Called when we have found a new IT87. */ 1159 static void it87_init_client(struct i2c_client *client, struct it87_data *data) 1160 { 1161 int tmp, i; 1162 1163 /* initialize to sane defaults: 1164 * - if the chip is in manual pwm mode, this will be overwritten with 1165 * the actual settings on the chip (so in this case, initialization 1166 * is not needed) 1167 * - if in automatic or on/off mode, we could switch to manual mode, 1168 * read the registers and set manual_pwm_ctl accordingly, but currently 1169 * this is not implemented, so we initialize to something sane */ 1170 for (i = 0; i < 3; i++) { 1171 data->manual_pwm_ctl[i] = 0xff; 1172 } 1173 1174 /* Some chips seem to have default value 0xff for all limit 1175 * registers. For low voltage limits it makes no sense and triggers 1176 * alarms, so change to 0 instead. For high temperature limits, it 1177 * means -1 degree C, which surprisingly doesn't trigger an alarm, 1178 * but is still confusing, so change to 127 degrees C. */ 1179 for (i = 0; i < 8; i++) { 1180 tmp = it87_read_value(client, IT87_REG_VIN_MIN(i)); 1181 if (tmp == 0xff) 1182 it87_write_value(client, IT87_REG_VIN_MIN(i), 0); 1183 } 1184 for (i = 0; i < 3; i++) { 1185 tmp = it87_read_value(client, IT87_REG_TEMP_HIGH(i)); 1186 if (tmp == 0xff) 1187 it87_write_value(client, IT87_REG_TEMP_HIGH(i), 127); 1188 } 1189 1190 /* Check if temperature channnels are reset manually or by some reason */ 1191 tmp = it87_read_value(client, IT87_REG_TEMP_ENABLE); 1192 if ((tmp & 0x3f) == 0) { 1193 /* Temp1,Temp3=thermistor; Temp2=thermal diode */ 1194 tmp = (tmp & 0xc0) | 0x2a; 1195 it87_write_value(client, IT87_REG_TEMP_ENABLE, tmp); 1196 } 1197 data->sensor = tmp; 1198 1199 /* Check if voltage monitors are reset manually or by some reason */ 1200 tmp = it87_read_value(client, IT87_REG_VIN_ENABLE); 1201 if ((tmp & 0xff) == 0) { 1202 /* Enable all voltage monitors */ 1203 it87_write_value(client, IT87_REG_VIN_ENABLE, 0xff); 1204 } 1205 1206 /* Check if tachometers are reset manually or by some reason */ 1207 data->fan_main_ctrl = it87_read_value(client, IT87_REG_FAN_MAIN_CTRL); 1208 if ((data->fan_main_ctrl & 0x70) == 0) { 1209 /* Enable all fan tachometers */ 1210 data->fan_main_ctrl |= 0x70; 1211 it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 1212 } 1213 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07; 1214 1215 /* Set tachometers to 16-bit mode if needed */ 1216 if (data->type == it8716 || data->type == it8718) { 1217 tmp = it87_read_value(client, IT87_REG_FAN_16BIT); 1218 if (~tmp & 0x07 & data->has_fan) { 1219 dev_dbg(&client->dev, 1220 "Setting fan1-3 to 16-bit mode\n"); 1221 it87_write_value(client, IT87_REG_FAN_16BIT, 1222 tmp | 0x07); 1223 } 1224 } 1225 1226 /* Set current fan mode registers and the default settings for the 1227 * other mode registers */ 1228 for (i = 0; i < 3; i++) { 1229 if (data->fan_main_ctrl & (1 << i)) { 1230 /* pwm mode */ 1231 tmp = it87_read_value(client, IT87_REG_PWM(i)); 1232 if (tmp & 0x80) { 1233 /* automatic pwm - not yet implemented, but 1234 * leave the settings made by the BIOS alone 1235 * until a change is requested via the sysfs 1236 * interface */ 1237 } else { 1238 /* manual pwm */ 1239 data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp); 1240 } 1241 } 1242 } 1243 1244 /* Start monitoring */ 1245 it87_write_value(client, IT87_REG_CONFIG, 1246 (it87_read_value(client, IT87_REG_CONFIG) & 0x36) 1247 | (update_vbat ? 0x41 : 0x01)); 1248 } 1249 1250 static struct it87_data *it87_update_device(struct device *dev) 1251 { 1252 struct i2c_client *client = to_i2c_client(dev); 1253 struct it87_data *data = i2c_get_clientdata(client); 1254 int i; 1255 1256 mutex_lock(&data->update_lock); 1257 1258 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 1259 || !data->valid) { 1260 1261 if (update_vbat) { 1262 /* Cleared after each update, so reenable. Value 1263 returned by this read will be previous value */ 1264 it87_write_value(client, IT87_REG_CONFIG, 1265 it87_read_value(client, IT87_REG_CONFIG) | 0x40); 1266 } 1267 for (i = 0; i <= 7; i++) { 1268 data->in[i] = 1269 it87_read_value(client, IT87_REG_VIN(i)); 1270 data->in_min[i] = 1271 it87_read_value(client, IT87_REG_VIN_MIN(i)); 1272 data->in_max[i] = 1273 it87_read_value(client, IT87_REG_VIN_MAX(i)); 1274 } 1275 /* in8 (battery) has no limit registers */ 1276 data->in[8] = 1277 it87_read_value(client, IT87_REG_VIN(8)); 1278 1279 for (i = 0; i < 3; i++) { 1280 /* Skip disabled fans */ 1281 if (!(data->has_fan & (1 << i))) 1282 continue; 1283 1284 data->fan_min[i] = 1285 it87_read_value(client, IT87_REG_FAN_MIN(i)); 1286 data->fan[i] = it87_read_value(client, 1287 IT87_REG_FAN(i)); 1288 /* Add high byte if in 16-bit mode */ 1289 if (data->type == it8716 || data->type == it8718) { 1290 data->fan[i] |= it87_read_value(client, 1291 IT87_REG_FANX(i)) << 8; 1292 data->fan_min[i] |= it87_read_value(client, 1293 IT87_REG_FANX_MIN(i)) << 8; 1294 } 1295 } 1296 for (i = 0; i < 3; i++) { 1297 data->temp[i] = 1298 it87_read_value(client, IT87_REG_TEMP(i)); 1299 data->temp_high[i] = 1300 it87_read_value(client, IT87_REG_TEMP_HIGH(i)); 1301 data->temp_low[i] = 1302 it87_read_value(client, IT87_REG_TEMP_LOW(i)); 1303 } 1304 1305 /* Newer chips don't have clock dividers */ 1306 if ((data->has_fan & 0x07) && data->type != it8716 1307 && data->type != it8718) { 1308 i = it87_read_value(client, IT87_REG_FAN_DIV); 1309 data->fan_div[0] = i & 0x07; 1310 data->fan_div[1] = (i >> 3) & 0x07; 1311 data->fan_div[2] = (i & 0x40) ? 3 : 1; 1312 } 1313 1314 data->alarms = 1315 it87_read_value(client, IT87_REG_ALARM1) | 1316 (it87_read_value(client, IT87_REG_ALARM2) << 8) | 1317 (it87_read_value(client, IT87_REG_ALARM3) << 16); 1318 data->fan_main_ctrl = it87_read_value(client, IT87_REG_FAN_MAIN_CTRL); 1319 1320 data->sensor = it87_read_value(client, IT87_REG_TEMP_ENABLE); 1321 /* The 8705 does not have VID capability */ 1322 if (data->type == it8712 || data->type == it8716) { 1323 data->vid = it87_read_value(client, IT87_REG_VID); 1324 /* The older IT8712F revisions had only 5 VID pins, 1325 but we assume it is always safe to read 6 bits. */ 1326 data->vid &= 0x3f; 1327 } 1328 data->last_updated = jiffies; 1329 data->valid = 1; 1330 } 1331 1332 mutex_unlock(&data->update_lock); 1333 1334 return data; 1335 } 1336 1337 static int __init sm_it87_init(void) 1338 { 1339 int res; 1340 1341 if ((res = it87_find(&isa_address))) 1342 return res; 1343 return i2c_isa_add_driver(&it87_isa_driver); 1344 } 1345 1346 static void __exit sm_it87_exit(void) 1347 { 1348 i2c_isa_del_driver(&it87_isa_driver); 1349 } 1350 1351 1352 MODULE_AUTHOR("Chris Gauthron <chrisg@0-in.com>, " 1353 "Jean Delvare <khali@linux-fr.org>"); 1354 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F, SiS950 driver"); 1355 module_param(update_vbat, bool, 0); 1356 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); 1357 module_param(fix_pwm_polarity, bool, 0); 1358 MODULE_PARM_DESC(fix_pwm_polarity, "Force PWM polarity to active high (DANGEROUS)"); 1359 MODULE_LICENSE("GPL"); 1360 1361 module_init(sm_it87_init); 1362 module_exit(sm_it87_exit); 1363