1 /* 2 * it87.c - Part of lm_sensors, Linux kernel modules for hardware 3 * monitoring. 4 * 5 * The IT8705F is an LPC-based Super I/O part that contains UARTs, a 6 * parallel port, an IR port, a MIDI port, a floppy controller, etc., in 7 * addition to an Environment Controller (Enhanced Hardware Monitor and 8 * Fan Controller) 9 * 10 * This driver supports only the Environment Controller in the IT8705F and 11 * similar parts. The other devices are supported by different drivers. 12 * 13 * Supports: IT8705F Super I/O chip w/LPC interface 14 * IT8712F Super I/O chip w/LPC interface 15 * IT8716F Super I/O chip w/LPC interface 16 * IT8718F Super I/O chip w/LPC interface 17 * IT8720F Super I/O chip w/LPC interface 18 * IT8721F Super I/O chip w/LPC interface 19 * IT8726F Super I/O chip w/LPC interface 20 * IT8758E Super I/O chip w/LPC interface 21 * Sis950 A clone of the IT8705F 22 * 23 * Copyright (C) 2001 Chris Gauthron 24 * Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org> 25 * 26 * This program is free software; you can redistribute it and/or modify 27 * it under the terms of the GNU General Public License as published by 28 * the Free Software Foundation; either version 2 of the License, or 29 * (at your option) any later version. 30 * 31 * This program is distributed in the hope that it will be useful, 32 * but WITHOUT ANY WARRANTY; without even the implied warranty of 33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 34 * GNU General Public License for more details. 35 * 36 * You should have received a copy of the GNU General Public License 37 * along with this program; if not, write to the Free Software 38 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 39 */ 40 41 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 42 43 #include <linux/module.h> 44 #include <linux/init.h> 45 #include <linux/slab.h> 46 #include <linux/jiffies.h> 47 #include <linux/platform_device.h> 48 #include <linux/hwmon.h> 49 #include <linux/hwmon-sysfs.h> 50 #include <linux/hwmon-vid.h> 51 #include <linux/err.h> 52 #include <linux/mutex.h> 53 #include <linux/sysfs.h> 54 #include <linux/string.h> 55 #include <linux/dmi.h> 56 #include <linux/acpi.h> 57 #include <linux/io.h> 58 59 #define DRVNAME "it87" 60 61 enum chips { it87, it8712, it8716, it8718, it8720, it8721 }; 62 63 static unsigned short force_id; 64 module_param(force_id, ushort, 0); 65 MODULE_PARM_DESC(force_id, "Override the detected device ID"); 66 67 static struct platform_device *pdev; 68 69 #define REG 0x2e /* The register to read/write */ 70 #define DEV 0x07 /* Register: Logical device select */ 71 #define VAL 0x2f /* The value to read/write */ 72 #define PME 0x04 /* The device with the fan registers in it */ 73 74 /* The device with the IT8718F/IT8720F VID value in it */ 75 #define GPIO 0x07 76 77 #define DEVID 0x20 /* Register: Device ID */ 78 #define DEVREV 0x22 /* Register: Device Revision */ 79 80 static inline int superio_inb(int reg) 81 { 82 outb(reg, REG); 83 return inb(VAL); 84 } 85 86 static inline void superio_outb(int reg, int val) 87 { 88 outb(reg, REG); 89 outb(val, VAL); 90 } 91 92 static int superio_inw(int reg) 93 { 94 int val; 95 outb(reg++, REG); 96 val = inb(VAL) << 8; 97 outb(reg, REG); 98 val |= inb(VAL); 99 return val; 100 } 101 102 static inline void superio_select(int ldn) 103 { 104 outb(DEV, REG); 105 outb(ldn, VAL); 106 } 107 108 static inline int superio_enter(void) 109 { 110 /* 111 * Try to reserve REG and REG + 1 for exclusive access. 112 */ 113 if (!request_muxed_region(REG, 2, DRVNAME)) 114 return -EBUSY; 115 116 outb(0x87, REG); 117 outb(0x01, REG); 118 outb(0x55, REG); 119 outb(0x55, REG); 120 return 0; 121 } 122 123 static inline void superio_exit(void) 124 { 125 outb(0x02, REG); 126 outb(0x02, VAL); 127 release_region(REG, 2); 128 } 129 130 /* Logical device 4 registers */ 131 #define IT8712F_DEVID 0x8712 132 #define IT8705F_DEVID 0x8705 133 #define IT8716F_DEVID 0x8716 134 #define IT8718F_DEVID 0x8718 135 #define IT8720F_DEVID 0x8720 136 #define IT8721F_DEVID 0x8721 137 #define IT8726F_DEVID 0x8726 138 #define IT87_ACT_REG 0x30 139 #define IT87_BASE_REG 0x60 140 141 /* Logical device 7 registers (IT8712F and later) */ 142 #define IT87_SIO_GPIO3_REG 0x27 143 #define IT87_SIO_GPIO5_REG 0x29 144 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */ 145 #define IT87_SIO_VID_REG 0xfc /* VID value */ 146 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */ 147 148 /* Update battery voltage after every reading if true */ 149 static int update_vbat; 150 151 /* Not all BIOSes properly configure the PWM registers */ 152 static int fix_pwm_polarity; 153 154 /* Many IT87 constants specified below */ 155 156 /* Length of ISA address segment */ 157 #define IT87_EXTENT 8 158 159 /* Length of ISA address segment for Environmental Controller */ 160 #define IT87_EC_EXTENT 2 161 162 /* Offset of EC registers from ISA base address */ 163 #define IT87_EC_OFFSET 5 164 165 /* Where are the ISA address/data registers relative to the EC base address */ 166 #define IT87_ADDR_REG_OFFSET 0 167 #define IT87_DATA_REG_OFFSET 1 168 169 /*----- The IT87 registers -----*/ 170 171 #define IT87_REG_CONFIG 0x00 172 173 #define IT87_REG_ALARM1 0x01 174 #define IT87_REG_ALARM2 0x02 175 #define IT87_REG_ALARM3 0x03 176 177 /* The IT8718F and IT8720F have the VID value in a different register, in 178 Super-I/O configuration space. */ 179 #define IT87_REG_VID 0x0a 180 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b 181 for fan divisors. Later IT8712F revisions must use 16-bit tachometer 182 mode. */ 183 #define IT87_REG_FAN_DIV 0x0b 184 #define IT87_REG_FAN_16BIT 0x0c 185 186 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */ 187 188 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 }; 189 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 }; 190 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 }; 191 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 }; 192 #define IT87_REG_FAN_MAIN_CTRL 0x13 193 #define IT87_REG_FAN_CTL 0x14 194 #define IT87_REG_PWM(nr) (0x15 + (nr)) 195 #define IT87_REG_PWM_DUTY(nr) (0x63 + (nr) * 8) 196 197 #define IT87_REG_VIN(nr) (0x20 + (nr)) 198 #define IT87_REG_TEMP(nr) (0x29 + (nr)) 199 200 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2) 201 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2) 202 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2) 203 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2) 204 205 #define IT87_REG_VIN_ENABLE 0x50 206 #define IT87_REG_TEMP_ENABLE 0x51 207 #define IT87_REG_BEEP_ENABLE 0x5c 208 209 #define IT87_REG_CHIPID 0x58 210 211 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i)) 212 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i)) 213 214 215 struct it87_sio_data { 216 enum chips type; 217 /* Values read from Super-I/O config space */ 218 u8 revision; 219 u8 vid_value; 220 u8 beep_pin; 221 u8 internal; /* Internal sensors can be labeled */ 222 /* Features skipped based on config or DMI */ 223 u8 skip_vid; 224 u8 skip_fan; 225 u8 skip_pwm; 226 }; 227 228 /* For each registered chip, we need to keep some data in memory. 229 The structure is dynamically allocated. */ 230 struct it87_data { 231 struct device *hwmon_dev; 232 enum chips type; 233 u8 revision; 234 235 unsigned short addr; 236 const char *name; 237 struct mutex update_lock; 238 char valid; /* !=0 if following fields are valid */ 239 unsigned long last_updated; /* In jiffies */ 240 241 u16 in_scaled; /* Internal voltage sensors are scaled */ 242 u8 in[9]; /* Register value */ 243 u8 in_max[8]; /* Register value */ 244 u8 in_min[8]; /* Register value */ 245 u8 has_fan; /* Bitfield, fans enabled */ 246 u16 fan[5]; /* Register values, possibly combined */ 247 u16 fan_min[5]; /* Register values, possibly combined */ 248 s8 temp[3]; /* Register value */ 249 s8 temp_high[3]; /* Register value */ 250 s8 temp_low[3]; /* Register value */ 251 u8 sensor; /* Register value */ 252 u8 fan_div[3]; /* Register encoding, shifted right */ 253 u8 vid; /* Register encoding, combined */ 254 u8 vrm; 255 u32 alarms; /* Register encoding, combined */ 256 u8 beeps; /* Register encoding */ 257 u8 fan_main_ctrl; /* Register value */ 258 u8 fan_ctl; /* Register value */ 259 260 /* The following 3 arrays correspond to the same registers up to 261 * the IT8720F. The meaning of bits 6-0 depends on the value of bit 262 * 7, and we want to preserve settings on mode changes, so we have 263 * to track all values separately. 264 * Starting with the IT8721F, the manual PWM duty cycles are stored 265 * in separate registers (8-bit values), so the separate tracking 266 * is no longer needed, but it is still done to keep the driver 267 * simple. */ 268 u8 pwm_ctrl[3]; /* Register value */ 269 u8 pwm_duty[3]; /* Manual PWM value set by user */ 270 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */ 271 272 /* Automatic fan speed control registers */ 273 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */ 274 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */ 275 }; 276 277 static u8 in_to_reg(const struct it87_data *data, int nr, long val) 278 { 279 long lsb; 280 281 if (data->type == it8721) { 282 if (data->in_scaled & (1 << nr)) 283 lsb = 24; 284 else 285 lsb = 12; 286 } else 287 lsb = 16; 288 289 val = DIV_ROUND_CLOSEST(val, lsb); 290 return SENSORS_LIMIT(val, 0, 255); 291 } 292 293 static int in_from_reg(const struct it87_data *data, int nr, int val) 294 { 295 if (data->type == it8721) { 296 if (data->in_scaled & (1 << nr)) 297 return val * 24; 298 else 299 return val * 12; 300 } else 301 return val * 16; 302 } 303 304 static inline u8 FAN_TO_REG(long rpm, int div) 305 { 306 if (rpm == 0) 307 return 255; 308 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 309 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 310 254); 311 } 312 313 static inline u16 FAN16_TO_REG(long rpm) 314 { 315 if (rpm == 0) 316 return 0xffff; 317 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe); 318 } 319 320 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \ 321 1350000 / ((val) * (div))) 322 /* The divider is fixed to 2 in 16-bit mode */ 323 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \ 324 1350000 / ((val) * 2)) 325 326 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \ 327 ((val) + 500) / 1000), -128, 127)) 328 #define TEMP_FROM_REG(val) ((val) * 1000) 329 330 static u8 pwm_to_reg(const struct it87_data *data, long val) 331 { 332 if (data->type == it8721) 333 return val; 334 else 335 return val >> 1; 336 } 337 338 static int pwm_from_reg(const struct it87_data *data, u8 reg) 339 { 340 if (data->type == it8721) 341 return reg; 342 else 343 return (reg & 0x7f) << 1; 344 } 345 346 347 static int DIV_TO_REG(int val) 348 { 349 int answer = 0; 350 while (answer < 7 && (val >>= 1)) 351 answer++; 352 return answer; 353 } 354 #define DIV_FROM_REG(val) (1 << (val)) 355 356 static const unsigned int pwm_freq[8] = { 357 48000000 / 128, 358 24000000 / 128, 359 12000000 / 128, 360 8000000 / 128, 361 6000000 / 128, 362 3000000 / 128, 363 1500000 / 128, 364 750000 / 128, 365 }; 366 367 static inline int has_16bit_fans(const struct it87_data *data) 368 { 369 /* IT8705F Datasheet 0.4.1, 3h == Version G. 370 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J. 371 These are the first revisions with 16bit tachometer support. */ 372 return (data->type == it87 && data->revision >= 0x03) 373 || (data->type == it8712 && data->revision >= 0x08) 374 || data->type == it8716 375 || data->type == it8718 376 || data->type == it8720 377 || data->type == it8721; 378 } 379 380 static inline int has_old_autopwm(const struct it87_data *data) 381 { 382 /* The old automatic fan speed control interface is implemented 383 by IT8705F chips up to revision F and IT8712F chips up to 384 revision G. */ 385 return (data->type == it87 && data->revision < 0x03) 386 || (data->type == it8712 && data->revision < 0x08); 387 } 388 389 static int it87_probe(struct platform_device *pdev); 390 static int __devexit it87_remove(struct platform_device *pdev); 391 392 static int it87_read_value(struct it87_data *data, u8 reg); 393 static void it87_write_value(struct it87_data *data, u8 reg, u8 value); 394 static struct it87_data *it87_update_device(struct device *dev); 395 static int it87_check_pwm(struct device *dev); 396 static void it87_init_device(struct platform_device *pdev); 397 398 399 static struct platform_driver it87_driver = { 400 .driver = { 401 .owner = THIS_MODULE, 402 .name = DRVNAME, 403 }, 404 .probe = it87_probe, 405 .remove = __devexit_p(it87_remove), 406 }; 407 408 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 409 char *buf) 410 { 411 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 412 int nr = sensor_attr->index; 413 414 struct it87_data *data = it87_update_device(dev); 415 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr])); 416 } 417 418 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 419 char *buf) 420 { 421 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 422 int nr = sensor_attr->index; 423 424 struct it87_data *data = it87_update_device(dev); 425 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_min[nr])); 426 } 427 428 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 429 char *buf) 430 { 431 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 432 int nr = sensor_attr->index; 433 434 struct it87_data *data = it87_update_device(dev); 435 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_max[nr])); 436 } 437 438 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 439 const char *buf, size_t count) 440 { 441 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 442 int nr = sensor_attr->index; 443 444 struct it87_data *data = dev_get_drvdata(dev); 445 unsigned long val; 446 447 if (strict_strtoul(buf, 10, &val) < 0) 448 return -EINVAL; 449 450 mutex_lock(&data->update_lock); 451 data->in_min[nr] = in_to_reg(data, nr, val); 452 it87_write_value(data, IT87_REG_VIN_MIN(nr), 453 data->in_min[nr]); 454 mutex_unlock(&data->update_lock); 455 return count; 456 } 457 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 458 const char *buf, size_t count) 459 { 460 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 461 int nr = sensor_attr->index; 462 463 struct it87_data *data = dev_get_drvdata(dev); 464 unsigned long val; 465 466 if (strict_strtoul(buf, 10, &val) < 0) 467 return -EINVAL; 468 469 mutex_lock(&data->update_lock); 470 data->in_max[nr] = in_to_reg(data, nr, val); 471 it87_write_value(data, IT87_REG_VIN_MAX(nr), 472 data->in_max[nr]); 473 mutex_unlock(&data->update_lock); 474 return count; 475 } 476 477 #define show_in_offset(offset) \ 478 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 479 show_in, NULL, offset); 480 481 #define limit_in_offset(offset) \ 482 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 483 show_in_min, set_in_min, offset); \ 484 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 485 show_in_max, set_in_max, offset); 486 487 show_in_offset(0); 488 limit_in_offset(0); 489 show_in_offset(1); 490 limit_in_offset(1); 491 show_in_offset(2); 492 limit_in_offset(2); 493 show_in_offset(3); 494 limit_in_offset(3); 495 show_in_offset(4); 496 limit_in_offset(4); 497 show_in_offset(5); 498 limit_in_offset(5); 499 show_in_offset(6); 500 limit_in_offset(6); 501 show_in_offset(7); 502 limit_in_offset(7); 503 show_in_offset(8); 504 505 /* 3 temperatures */ 506 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 507 char *buf) 508 { 509 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 510 int nr = sensor_attr->index; 511 512 struct it87_data *data = it87_update_device(dev); 513 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 514 } 515 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 516 char *buf) 517 { 518 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 519 int nr = sensor_attr->index; 520 521 struct it87_data *data = it87_update_device(dev); 522 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); 523 } 524 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 525 char *buf) 526 { 527 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 528 int nr = sensor_attr->index; 529 530 struct it87_data *data = it87_update_device(dev); 531 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); 532 } 533 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 534 const char *buf, size_t count) 535 { 536 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 537 int nr = sensor_attr->index; 538 539 struct it87_data *data = dev_get_drvdata(dev); 540 long val; 541 542 if (strict_strtol(buf, 10, &val) < 0) 543 return -EINVAL; 544 545 mutex_lock(&data->update_lock); 546 data->temp_high[nr] = TEMP_TO_REG(val); 547 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); 548 mutex_unlock(&data->update_lock); 549 return count; 550 } 551 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 552 const char *buf, size_t count) 553 { 554 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 555 int nr = sensor_attr->index; 556 557 struct it87_data *data = dev_get_drvdata(dev); 558 long val; 559 560 if (strict_strtol(buf, 10, &val) < 0) 561 return -EINVAL; 562 563 mutex_lock(&data->update_lock); 564 data->temp_low[nr] = TEMP_TO_REG(val); 565 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); 566 mutex_unlock(&data->update_lock); 567 return count; 568 } 569 #define show_temp_offset(offset) \ 570 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 571 show_temp, NULL, offset - 1); \ 572 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 573 show_temp_max, set_temp_max, offset - 1); \ 574 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 575 show_temp_min, set_temp_min, offset - 1); 576 577 show_temp_offset(1); 578 show_temp_offset(2); 579 show_temp_offset(3); 580 581 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, 582 char *buf) 583 { 584 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 585 int nr = sensor_attr->index; 586 587 struct it87_data *data = it87_update_device(dev); 588 u8 reg = data->sensor; /* In case the value is updated while 589 we use it */ 590 591 if (reg & (1 << nr)) 592 return sprintf(buf, "3\n"); /* thermal diode */ 593 if (reg & (8 << nr)) 594 return sprintf(buf, "4\n"); /* thermistor */ 595 return sprintf(buf, "0\n"); /* disabled */ 596 } 597 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, 598 const char *buf, size_t count) 599 { 600 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 601 int nr = sensor_attr->index; 602 603 struct it87_data *data = dev_get_drvdata(dev); 604 long val; 605 u8 reg; 606 607 if (strict_strtol(buf, 10, &val) < 0) 608 return -EINVAL; 609 610 reg = it87_read_value(data, IT87_REG_TEMP_ENABLE); 611 reg &= ~(1 << nr); 612 reg &= ~(8 << nr); 613 if (val == 2) { /* backwards compatibility */ 614 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 " 615 "instead\n"); 616 val = 4; 617 } 618 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */ 619 if (val == 3) 620 reg |= 1 << nr; 621 else if (val == 4) 622 reg |= 8 << nr; 623 else if (val != 0) 624 return -EINVAL; 625 626 mutex_lock(&data->update_lock); 627 data->sensor = reg; 628 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor); 629 data->valid = 0; /* Force cache refresh */ 630 mutex_unlock(&data->update_lock); 631 return count; 632 } 633 #define show_sensor_offset(offset) \ 634 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ 635 show_sensor, set_sensor, offset - 1); 636 637 show_sensor_offset(1); 638 show_sensor_offset(2); 639 show_sensor_offset(3); 640 641 /* 3 Fans */ 642 643 static int pwm_mode(const struct it87_data *data, int nr) 644 { 645 int ctrl = data->fan_main_ctrl & (1 << nr); 646 647 if (ctrl == 0) /* Full speed */ 648 return 0; 649 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */ 650 return 2; 651 else /* Manual mode */ 652 return 1; 653 } 654 655 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 656 char *buf) 657 { 658 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 659 int nr = sensor_attr->index; 660 661 struct it87_data *data = it87_update_device(dev); 662 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 663 DIV_FROM_REG(data->fan_div[nr]))); 664 } 665 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 666 char *buf) 667 { 668 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 669 int nr = sensor_attr->index; 670 671 struct it87_data *data = it87_update_device(dev); 672 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 673 DIV_FROM_REG(data->fan_div[nr]))); 674 } 675 static ssize_t show_fan_div(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; 680 681 struct it87_data *data = it87_update_device(dev); 682 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 683 } 684 static ssize_t show_pwm_enable(struct device *dev, 685 struct device_attribute *attr, char *buf) 686 { 687 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 688 int nr = sensor_attr->index; 689 690 struct it87_data *data = it87_update_device(dev); 691 return sprintf(buf, "%d\n", pwm_mode(data, nr)); 692 } 693 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 694 char *buf) 695 { 696 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 697 int nr = sensor_attr->index; 698 699 struct it87_data *data = it87_update_device(dev); 700 return sprintf(buf, "%d\n", 701 pwm_from_reg(data, data->pwm_duty[nr])); 702 } 703 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr, 704 char *buf) 705 { 706 struct it87_data *data = it87_update_device(dev); 707 int index = (data->fan_ctl >> 4) & 0x07; 708 709 return sprintf(buf, "%u\n", pwm_freq[index]); 710 } 711 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 712 const char *buf, size_t count) 713 { 714 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 715 int nr = sensor_attr->index; 716 717 struct it87_data *data = dev_get_drvdata(dev); 718 long val; 719 u8 reg; 720 721 if (strict_strtol(buf, 10, &val) < 0) 722 return -EINVAL; 723 724 mutex_lock(&data->update_lock); 725 reg = it87_read_value(data, IT87_REG_FAN_DIV); 726 switch (nr) { 727 case 0: 728 data->fan_div[nr] = reg & 0x07; 729 break; 730 case 1: 731 data->fan_div[nr] = (reg >> 3) & 0x07; 732 break; 733 case 2: 734 data->fan_div[nr] = (reg & 0x40) ? 3 : 1; 735 break; 736 } 737 738 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 739 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 740 mutex_unlock(&data->update_lock); 741 return count; 742 } 743 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 744 const char *buf, size_t count) 745 { 746 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 747 int nr = sensor_attr->index; 748 749 struct it87_data *data = dev_get_drvdata(dev); 750 unsigned long val; 751 int min; 752 u8 old; 753 754 if (strict_strtoul(buf, 10, &val) < 0) 755 return -EINVAL; 756 757 mutex_lock(&data->update_lock); 758 old = it87_read_value(data, IT87_REG_FAN_DIV); 759 760 /* Save fan min limit */ 761 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 762 763 switch (nr) { 764 case 0: 765 case 1: 766 data->fan_div[nr] = DIV_TO_REG(val); 767 break; 768 case 2: 769 if (val < 8) 770 data->fan_div[nr] = 1; 771 else 772 data->fan_div[nr] = 3; 773 } 774 val = old & 0x80; 775 val |= (data->fan_div[0] & 0x07); 776 val |= (data->fan_div[1] & 0x07) << 3; 777 if (data->fan_div[2] == 3) 778 val |= 0x1 << 6; 779 it87_write_value(data, IT87_REG_FAN_DIV, val); 780 781 /* Restore fan min limit */ 782 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 783 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 784 785 mutex_unlock(&data->update_lock); 786 return count; 787 } 788 789 /* Returns 0 if OK, -EINVAL otherwise */ 790 static int check_trip_points(struct device *dev, int nr) 791 { 792 const struct it87_data *data = dev_get_drvdata(dev); 793 int i, err = 0; 794 795 if (has_old_autopwm(data)) { 796 for (i = 0; i < 3; i++) { 797 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1]) 798 err = -EINVAL; 799 } 800 for (i = 0; i < 2; i++) { 801 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1]) 802 err = -EINVAL; 803 } 804 } 805 806 if (err) { 807 dev_err(dev, "Inconsistent trip points, not switching to " 808 "automatic mode\n"); 809 dev_err(dev, "Adjust the trip points and try again\n"); 810 } 811 return err; 812 } 813 814 static ssize_t set_pwm_enable(struct device *dev, 815 struct device_attribute *attr, const char *buf, size_t count) 816 { 817 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 818 int nr = sensor_attr->index; 819 820 struct it87_data *data = dev_get_drvdata(dev); 821 long val; 822 823 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2) 824 return -EINVAL; 825 826 /* Check trip points before switching to automatic mode */ 827 if (val == 2) { 828 if (check_trip_points(dev, nr) < 0) 829 return -EINVAL; 830 } 831 832 mutex_lock(&data->update_lock); 833 834 if (val == 0) { 835 int tmp; 836 /* make sure the fan is on when in on/off mode */ 837 tmp = it87_read_value(data, IT87_REG_FAN_CTL); 838 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr)); 839 /* set on/off mode */ 840 data->fan_main_ctrl &= ~(1 << nr); 841 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 842 data->fan_main_ctrl); 843 } else { 844 if (val == 1) /* Manual mode */ 845 data->pwm_ctrl[nr] = data->type == it8721 ? 846 data->pwm_temp_map[nr] : 847 data->pwm_duty[nr]; 848 else /* Automatic mode */ 849 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 850 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 851 /* set SmartGuardian mode */ 852 data->fan_main_ctrl |= (1 << nr); 853 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 854 data->fan_main_ctrl); 855 } 856 857 mutex_unlock(&data->update_lock); 858 return count; 859 } 860 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 861 const char *buf, size_t count) 862 { 863 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 864 int nr = sensor_attr->index; 865 866 struct it87_data *data = dev_get_drvdata(dev); 867 long val; 868 869 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255) 870 return -EINVAL; 871 872 mutex_lock(&data->update_lock); 873 if (data->type == it8721) { 874 /* If we are in automatic mode, the PWM duty cycle register 875 * is read-only so we can't write the value */ 876 if (data->pwm_ctrl[nr] & 0x80) { 877 mutex_unlock(&data->update_lock); 878 return -EBUSY; 879 } 880 data->pwm_duty[nr] = pwm_to_reg(data, val); 881 it87_write_value(data, IT87_REG_PWM_DUTY(nr), 882 data->pwm_duty[nr]); 883 } else { 884 data->pwm_duty[nr] = pwm_to_reg(data, val); 885 /* If we are in manual mode, write the duty cycle immediately; 886 * otherwise, just store it for later use. */ 887 if (!(data->pwm_ctrl[nr] & 0x80)) { 888 data->pwm_ctrl[nr] = data->pwm_duty[nr]; 889 it87_write_value(data, IT87_REG_PWM(nr), 890 data->pwm_ctrl[nr]); 891 } 892 } 893 mutex_unlock(&data->update_lock); 894 return count; 895 } 896 static ssize_t set_pwm_freq(struct device *dev, 897 struct device_attribute *attr, const char *buf, size_t count) 898 { 899 struct it87_data *data = dev_get_drvdata(dev); 900 unsigned long val; 901 int i; 902 903 if (strict_strtoul(buf, 10, &val) < 0) 904 return -EINVAL; 905 906 /* Search for the nearest available frequency */ 907 for (i = 0; i < 7; i++) { 908 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2) 909 break; 910 } 911 912 mutex_lock(&data->update_lock); 913 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f; 914 data->fan_ctl |= i << 4; 915 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl); 916 mutex_unlock(&data->update_lock); 917 918 return count; 919 } 920 static ssize_t show_pwm_temp_map(struct device *dev, 921 struct device_attribute *attr, char *buf) 922 { 923 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 924 int nr = sensor_attr->index; 925 926 struct it87_data *data = it87_update_device(dev); 927 int map; 928 929 if (data->pwm_temp_map[nr] < 3) 930 map = 1 << data->pwm_temp_map[nr]; 931 else 932 map = 0; /* Should never happen */ 933 return sprintf(buf, "%d\n", map); 934 } 935 static ssize_t set_pwm_temp_map(struct device *dev, 936 struct device_attribute *attr, const char *buf, size_t count) 937 { 938 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 939 int nr = sensor_attr->index; 940 941 struct it87_data *data = dev_get_drvdata(dev); 942 long val; 943 u8 reg; 944 945 /* This check can go away if we ever support automatic fan speed 946 control on newer chips. */ 947 if (!has_old_autopwm(data)) { 948 dev_notice(dev, "Mapping change disabled for safety reasons\n"); 949 return -EINVAL; 950 } 951 952 if (strict_strtol(buf, 10, &val) < 0) 953 return -EINVAL; 954 955 switch (val) { 956 case (1 << 0): 957 reg = 0x00; 958 break; 959 case (1 << 1): 960 reg = 0x01; 961 break; 962 case (1 << 2): 963 reg = 0x02; 964 break; 965 default: 966 return -EINVAL; 967 } 968 969 mutex_lock(&data->update_lock); 970 data->pwm_temp_map[nr] = reg; 971 /* If we are in automatic mode, write the temp mapping immediately; 972 * otherwise, just store it for later use. */ 973 if (data->pwm_ctrl[nr] & 0x80) { 974 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 975 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 976 } 977 mutex_unlock(&data->update_lock); 978 return count; 979 } 980 981 static ssize_t show_auto_pwm(struct device *dev, 982 struct device_attribute *attr, char *buf) 983 { 984 struct it87_data *data = it87_update_device(dev); 985 struct sensor_device_attribute_2 *sensor_attr = 986 to_sensor_dev_attr_2(attr); 987 int nr = sensor_attr->nr; 988 int point = sensor_attr->index; 989 990 return sprintf(buf, "%d\n", 991 pwm_from_reg(data, data->auto_pwm[nr][point])); 992 } 993 994 static ssize_t set_auto_pwm(struct device *dev, 995 struct device_attribute *attr, const char *buf, size_t count) 996 { 997 struct it87_data *data = dev_get_drvdata(dev); 998 struct sensor_device_attribute_2 *sensor_attr = 999 to_sensor_dev_attr_2(attr); 1000 int nr = sensor_attr->nr; 1001 int point = sensor_attr->index; 1002 long val; 1003 1004 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255) 1005 return -EINVAL; 1006 1007 mutex_lock(&data->update_lock); 1008 data->auto_pwm[nr][point] = pwm_to_reg(data, val); 1009 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point), 1010 data->auto_pwm[nr][point]); 1011 mutex_unlock(&data->update_lock); 1012 return count; 1013 } 1014 1015 static ssize_t show_auto_temp(struct device *dev, 1016 struct device_attribute *attr, char *buf) 1017 { 1018 struct it87_data *data = it87_update_device(dev); 1019 struct sensor_device_attribute_2 *sensor_attr = 1020 to_sensor_dev_attr_2(attr); 1021 int nr = sensor_attr->nr; 1022 int point = sensor_attr->index; 1023 1024 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point])); 1025 } 1026 1027 static ssize_t set_auto_temp(struct device *dev, 1028 struct device_attribute *attr, const char *buf, size_t count) 1029 { 1030 struct it87_data *data = dev_get_drvdata(dev); 1031 struct sensor_device_attribute_2 *sensor_attr = 1032 to_sensor_dev_attr_2(attr); 1033 int nr = sensor_attr->nr; 1034 int point = sensor_attr->index; 1035 long val; 1036 1037 if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000) 1038 return -EINVAL; 1039 1040 mutex_lock(&data->update_lock); 1041 data->auto_temp[nr][point] = TEMP_TO_REG(val); 1042 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point), 1043 data->auto_temp[nr][point]); 1044 mutex_unlock(&data->update_lock); 1045 return count; 1046 } 1047 1048 #define show_fan_offset(offset) \ 1049 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 1050 show_fan, NULL, offset - 1); \ 1051 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 1052 show_fan_min, set_fan_min, offset - 1); \ 1053 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 1054 show_fan_div, set_fan_div, offset - 1); 1055 1056 show_fan_offset(1); 1057 show_fan_offset(2); 1058 show_fan_offset(3); 1059 1060 #define show_pwm_offset(offset) \ 1061 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 1062 show_pwm_enable, set_pwm_enable, offset - 1); \ 1063 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 1064 show_pwm, set_pwm, offset - 1); \ 1065 static DEVICE_ATTR(pwm##offset##_freq, \ 1066 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \ 1067 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \ 1068 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \ 1069 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \ 1070 offset - 1); \ 1071 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \ 1072 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1073 offset - 1, 0); \ 1074 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \ 1075 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1076 offset - 1, 1); \ 1077 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \ 1078 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1079 offset - 1, 2); \ 1080 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \ 1081 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \ 1082 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \ 1083 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1084 offset - 1, 1); \ 1085 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \ 1086 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1087 offset - 1, 0); \ 1088 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \ 1089 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1090 offset - 1, 2); \ 1091 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \ 1092 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1093 offset - 1, 3); \ 1094 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \ 1095 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1096 offset - 1, 4); 1097 1098 show_pwm_offset(1); 1099 show_pwm_offset(2); 1100 show_pwm_offset(3); 1101 1102 /* A different set of callbacks for 16-bit fans */ 1103 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr, 1104 char *buf) 1105 { 1106 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1107 int nr = sensor_attr->index; 1108 struct it87_data *data = it87_update_device(dev); 1109 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr])); 1110 } 1111 1112 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr, 1113 char *buf) 1114 { 1115 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1116 int nr = sensor_attr->index; 1117 struct it87_data *data = it87_update_device(dev); 1118 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr])); 1119 } 1120 1121 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr, 1122 const char *buf, size_t count) 1123 { 1124 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1125 int nr = sensor_attr->index; 1126 struct it87_data *data = dev_get_drvdata(dev); 1127 long val; 1128 1129 if (strict_strtol(buf, 10, &val) < 0) 1130 return -EINVAL; 1131 1132 mutex_lock(&data->update_lock); 1133 data->fan_min[nr] = FAN16_TO_REG(val); 1134 it87_write_value(data, IT87_REG_FAN_MIN[nr], 1135 data->fan_min[nr] & 0xff); 1136 it87_write_value(data, IT87_REG_FANX_MIN[nr], 1137 data->fan_min[nr] >> 8); 1138 mutex_unlock(&data->update_lock); 1139 return count; 1140 } 1141 1142 /* We want to use the same sysfs file names as 8-bit fans, but we need 1143 different variable names, so we have to use SENSOR_ATTR instead of 1144 SENSOR_DEVICE_ATTR. */ 1145 #define show_fan16_offset(offset) \ 1146 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \ 1147 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \ 1148 show_fan16, NULL, offset - 1); \ 1149 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \ 1150 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 1151 show_fan16_min, set_fan16_min, offset - 1) 1152 1153 show_fan16_offset(1); 1154 show_fan16_offset(2); 1155 show_fan16_offset(3); 1156 show_fan16_offset(4); 1157 show_fan16_offset(5); 1158 1159 /* Alarms */ 1160 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 1161 char *buf) 1162 { 1163 struct it87_data *data = it87_update_device(dev); 1164 return sprintf(buf, "%u\n", data->alarms); 1165 } 1166 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 1167 1168 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 1169 char *buf) 1170 { 1171 int bitnr = to_sensor_dev_attr(attr)->index; 1172 struct it87_data *data = it87_update_device(dev); 1173 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 1174 } 1175 1176 static ssize_t clear_intrusion(struct device *dev, struct device_attribute 1177 *attr, const char *buf, size_t count) 1178 { 1179 struct it87_data *data = dev_get_drvdata(dev); 1180 long val; 1181 int config; 1182 1183 if (strict_strtol(buf, 10, &val) < 0 || val != 0) 1184 return -EINVAL; 1185 1186 mutex_lock(&data->update_lock); 1187 config = it87_read_value(data, IT87_REG_CONFIG); 1188 if (config < 0) { 1189 count = config; 1190 } else { 1191 config |= 1 << 5; 1192 it87_write_value(data, IT87_REG_CONFIG, config); 1193 /* Invalidate cache to force re-read */ 1194 data->valid = 0; 1195 } 1196 mutex_unlock(&data->update_lock); 1197 1198 return count; 1199 } 1200 1201 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8); 1202 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9); 1203 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10); 1204 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11); 1205 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12); 1206 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13); 1207 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14); 1208 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15); 1209 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0); 1210 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1); 1211 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2); 1212 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3); 1213 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6); 1214 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16); 1215 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17); 1216 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18); 1217 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR, 1218 show_alarm, clear_intrusion, 4); 1219 1220 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 1221 char *buf) 1222 { 1223 int bitnr = to_sensor_dev_attr(attr)->index; 1224 struct it87_data *data = it87_update_device(dev); 1225 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1); 1226 } 1227 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 1228 const char *buf, size_t count) 1229 { 1230 int bitnr = to_sensor_dev_attr(attr)->index; 1231 struct it87_data *data = dev_get_drvdata(dev); 1232 long val; 1233 1234 if (strict_strtol(buf, 10, &val) < 0 1235 || (val != 0 && val != 1)) 1236 return -EINVAL; 1237 1238 mutex_lock(&data->update_lock); 1239 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE); 1240 if (val) 1241 data->beeps |= (1 << bitnr); 1242 else 1243 data->beeps &= ~(1 << bitnr); 1244 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps); 1245 mutex_unlock(&data->update_lock); 1246 return count; 1247 } 1248 1249 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, 1250 show_beep, set_beep, 1); 1251 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1); 1252 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1); 1253 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1); 1254 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1); 1255 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1); 1256 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1); 1257 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1); 1258 /* fanX_beep writability is set later */ 1259 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0); 1260 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0); 1261 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0); 1262 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0); 1263 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0); 1264 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, 1265 show_beep, set_beep, 2); 1266 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2); 1267 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2); 1268 1269 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr, 1270 char *buf) 1271 { 1272 struct it87_data *data = dev_get_drvdata(dev); 1273 return sprintf(buf, "%u\n", data->vrm); 1274 } 1275 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr, 1276 const char *buf, size_t count) 1277 { 1278 struct it87_data *data = dev_get_drvdata(dev); 1279 unsigned long val; 1280 1281 if (strict_strtoul(buf, 10, &val) < 0) 1282 return -EINVAL; 1283 1284 data->vrm = val; 1285 1286 return count; 1287 } 1288 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 1289 1290 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr, 1291 char *buf) 1292 { 1293 struct it87_data *data = it87_update_device(dev); 1294 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 1295 } 1296 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 1297 1298 static ssize_t show_label(struct device *dev, struct device_attribute *attr, 1299 char *buf) 1300 { 1301 static const char *labels[] = { 1302 "+5V", 1303 "5VSB", 1304 "Vbat", 1305 }; 1306 static const char *labels_it8721[] = { 1307 "+3.3V", 1308 "3VSB", 1309 "Vbat", 1310 }; 1311 struct it87_data *data = dev_get_drvdata(dev); 1312 int nr = to_sensor_dev_attr(attr)->index; 1313 1314 return sprintf(buf, "%s\n", data->type == it8721 ? labels_it8721[nr] 1315 : labels[nr]); 1316 } 1317 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0); 1318 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1); 1319 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2); 1320 1321 static ssize_t show_name(struct device *dev, struct device_attribute 1322 *devattr, char *buf) 1323 { 1324 struct it87_data *data = dev_get_drvdata(dev); 1325 return sprintf(buf, "%s\n", data->name); 1326 } 1327 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 1328 1329 static struct attribute *it87_attributes[] = { 1330 &sensor_dev_attr_in0_input.dev_attr.attr, 1331 &sensor_dev_attr_in1_input.dev_attr.attr, 1332 &sensor_dev_attr_in2_input.dev_attr.attr, 1333 &sensor_dev_attr_in3_input.dev_attr.attr, 1334 &sensor_dev_attr_in4_input.dev_attr.attr, 1335 &sensor_dev_attr_in5_input.dev_attr.attr, 1336 &sensor_dev_attr_in6_input.dev_attr.attr, 1337 &sensor_dev_attr_in7_input.dev_attr.attr, 1338 &sensor_dev_attr_in8_input.dev_attr.attr, 1339 &sensor_dev_attr_in0_min.dev_attr.attr, 1340 &sensor_dev_attr_in1_min.dev_attr.attr, 1341 &sensor_dev_attr_in2_min.dev_attr.attr, 1342 &sensor_dev_attr_in3_min.dev_attr.attr, 1343 &sensor_dev_attr_in4_min.dev_attr.attr, 1344 &sensor_dev_attr_in5_min.dev_attr.attr, 1345 &sensor_dev_attr_in6_min.dev_attr.attr, 1346 &sensor_dev_attr_in7_min.dev_attr.attr, 1347 &sensor_dev_attr_in0_max.dev_attr.attr, 1348 &sensor_dev_attr_in1_max.dev_attr.attr, 1349 &sensor_dev_attr_in2_max.dev_attr.attr, 1350 &sensor_dev_attr_in3_max.dev_attr.attr, 1351 &sensor_dev_attr_in4_max.dev_attr.attr, 1352 &sensor_dev_attr_in5_max.dev_attr.attr, 1353 &sensor_dev_attr_in6_max.dev_attr.attr, 1354 &sensor_dev_attr_in7_max.dev_attr.attr, 1355 &sensor_dev_attr_in0_alarm.dev_attr.attr, 1356 &sensor_dev_attr_in1_alarm.dev_attr.attr, 1357 &sensor_dev_attr_in2_alarm.dev_attr.attr, 1358 &sensor_dev_attr_in3_alarm.dev_attr.attr, 1359 &sensor_dev_attr_in4_alarm.dev_attr.attr, 1360 &sensor_dev_attr_in5_alarm.dev_attr.attr, 1361 &sensor_dev_attr_in6_alarm.dev_attr.attr, 1362 &sensor_dev_attr_in7_alarm.dev_attr.attr, 1363 1364 &sensor_dev_attr_temp1_input.dev_attr.attr, 1365 &sensor_dev_attr_temp2_input.dev_attr.attr, 1366 &sensor_dev_attr_temp3_input.dev_attr.attr, 1367 &sensor_dev_attr_temp1_max.dev_attr.attr, 1368 &sensor_dev_attr_temp2_max.dev_attr.attr, 1369 &sensor_dev_attr_temp3_max.dev_attr.attr, 1370 &sensor_dev_attr_temp1_min.dev_attr.attr, 1371 &sensor_dev_attr_temp2_min.dev_attr.attr, 1372 &sensor_dev_attr_temp3_min.dev_attr.attr, 1373 &sensor_dev_attr_temp1_type.dev_attr.attr, 1374 &sensor_dev_attr_temp2_type.dev_attr.attr, 1375 &sensor_dev_attr_temp3_type.dev_attr.attr, 1376 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1377 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1378 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1379 1380 &dev_attr_alarms.attr, 1381 &sensor_dev_attr_intrusion0_alarm.dev_attr.attr, 1382 &dev_attr_name.attr, 1383 NULL 1384 }; 1385 1386 static const struct attribute_group it87_group = { 1387 .attrs = it87_attributes, 1388 }; 1389 1390 static struct attribute *it87_attributes_beep[] = { 1391 &sensor_dev_attr_in0_beep.dev_attr.attr, 1392 &sensor_dev_attr_in1_beep.dev_attr.attr, 1393 &sensor_dev_attr_in2_beep.dev_attr.attr, 1394 &sensor_dev_attr_in3_beep.dev_attr.attr, 1395 &sensor_dev_attr_in4_beep.dev_attr.attr, 1396 &sensor_dev_attr_in5_beep.dev_attr.attr, 1397 &sensor_dev_attr_in6_beep.dev_attr.attr, 1398 &sensor_dev_attr_in7_beep.dev_attr.attr, 1399 1400 &sensor_dev_attr_temp1_beep.dev_attr.attr, 1401 &sensor_dev_attr_temp2_beep.dev_attr.attr, 1402 &sensor_dev_attr_temp3_beep.dev_attr.attr, 1403 NULL 1404 }; 1405 1406 static const struct attribute_group it87_group_beep = { 1407 .attrs = it87_attributes_beep, 1408 }; 1409 1410 static struct attribute *it87_attributes_fan16[5][3+1] = { { 1411 &sensor_dev_attr_fan1_input16.dev_attr.attr, 1412 &sensor_dev_attr_fan1_min16.dev_attr.attr, 1413 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1414 NULL 1415 }, { 1416 &sensor_dev_attr_fan2_input16.dev_attr.attr, 1417 &sensor_dev_attr_fan2_min16.dev_attr.attr, 1418 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1419 NULL 1420 }, { 1421 &sensor_dev_attr_fan3_input16.dev_attr.attr, 1422 &sensor_dev_attr_fan3_min16.dev_attr.attr, 1423 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1424 NULL 1425 }, { 1426 &sensor_dev_attr_fan4_input16.dev_attr.attr, 1427 &sensor_dev_attr_fan4_min16.dev_attr.attr, 1428 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1429 NULL 1430 }, { 1431 &sensor_dev_attr_fan5_input16.dev_attr.attr, 1432 &sensor_dev_attr_fan5_min16.dev_attr.attr, 1433 &sensor_dev_attr_fan5_alarm.dev_attr.attr, 1434 NULL 1435 } }; 1436 1437 static const struct attribute_group it87_group_fan16[5] = { 1438 { .attrs = it87_attributes_fan16[0] }, 1439 { .attrs = it87_attributes_fan16[1] }, 1440 { .attrs = it87_attributes_fan16[2] }, 1441 { .attrs = it87_attributes_fan16[3] }, 1442 { .attrs = it87_attributes_fan16[4] }, 1443 }; 1444 1445 static struct attribute *it87_attributes_fan[3][4+1] = { { 1446 &sensor_dev_attr_fan1_input.dev_attr.attr, 1447 &sensor_dev_attr_fan1_min.dev_attr.attr, 1448 &sensor_dev_attr_fan1_div.dev_attr.attr, 1449 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1450 NULL 1451 }, { 1452 &sensor_dev_attr_fan2_input.dev_attr.attr, 1453 &sensor_dev_attr_fan2_min.dev_attr.attr, 1454 &sensor_dev_attr_fan2_div.dev_attr.attr, 1455 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1456 NULL 1457 }, { 1458 &sensor_dev_attr_fan3_input.dev_attr.attr, 1459 &sensor_dev_attr_fan3_min.dev_attr.attr, 1460 &sensor_dev_attr_fan3_div.dev_attr.attr, 1461 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1462 NULL 1463 } }; 1464 1465 static const struct attribute_group it87_group_fan[3] = { 1466 { .attrs = it87_attributes_fan[0] }, 1467 { .attrs = it87_attributes_fan[1] }, 1468 { .attrs = it87_attributes_fan[2] }, 1469 }; 1470 1471 static const struct attribute_group * 1472 it87_get_fan_group(const struct it87_data *data) 1473 { 1474 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan; 1475 } 1476 1477 static struct attribute *it87_attributes_pwm[3][4+1] = { { 1478 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1479 &sensor_dev_attr_pwm1.dev_attr.attr, 1480 &dev_attr_pwm1_freq.attr, 1481 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, 1482 NULL 1483 }, { 1484 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1485 &sensor_dev_attr_pwm2.dev_attr.attr, 1486 &dev_attr_pwm2_freq.attr, 1487 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr, 1488 NULL 1489 }, { 1490 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1491 &sensor_dev_attr_pwm3.dev_attr.attr, 1492 &dev_attr_pwm3_freq.attr, 1493 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, 1494 NULL 1495 } }; 1496 1497 static const struct attribute_group it87_group_pwm[3] = { 1498 { .attrs = it87_attributes_pwm[0] }, 1499 { .attrs = it87_attributes_pwm[1] }, 1500 { .attrs = it87_attributes_pwm[2] }, 1501 }; 1502 1503 static struct attribute *it87_attributes_autopwm[3][9+1] = { { 1504 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1505 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1506 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 1507 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 1508 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 1509 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 1510 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 1511 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 1512 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 1513 NULL 1514 }, { 1515 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, 1516 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, 1517 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr, 1518 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr, 1519 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr, 1520 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr, 1521 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr, 1522 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr, 1523 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr, 1524 NULL 1525 }, { 1526 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, 1527 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, 1528 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr, 1529 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr, 1530 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr, 1531 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr, 1532 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr, 1533 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr, 1534 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr, 1535 NULL 1536 } }; 1537 1538 static const struct attribute_group it87_group_autopwm[3] = { 1539 { .attrs = it87_attributes_autopwm[0] }, 1540 { .attrs = it87_attributes_autopwm[1] }, 1541 { .attrs = it87_attributes_autopwm[2] }, 1542 }; 1543 1544 static struct attribute *it87_attributes_fan_beep[] = { 1545 &sensor_dev_attr_fan1_beep.dev_attr.attr, 1546 &sensor_dev_attr_fan2_beep.dev_attr.attr, 1547 &sensor_dev_attr_fan3_beep.dev_attr.attr, 1548 &sensor_dev_attr_fan4_beep.dev_attr.attr, 1549 &sensor_dev_attr_fan5_beep.dev_attr.attr, 1550 }; 1551 1552 static struct attribute *it87_attributes_vid[] = { 1553 &dev_attr_vrm.attr, 1554 &dev_attr_cpu0_vid.attr, 1555 NULL 1556 }; 1557 1558 static const struct attribute_group it87_group_vid = { 1559 .attrs = it87_attributes_vid, 1560 }; 1561 1562 static struct attribute *it87_attributes_label[] = { 1563 &sensor_dev_attr_in3_label.dev_attr.attr, 1564 &sensor_dev_attr_in7_label.dev_attr.attr, 1565 &sensor_dev_attr_in8_label.dev_attr.attr, 1566 NULL 1567 }; 1568 1569 static const struct attribute_group it87_group_label = { 1570 .attrs = it87_attributes_label, 1571 }; 1572 1573 /* SuperIO detection - will change isa_address if a chip is found */ 1574 static int __init it87_find(unsigned short *address, 1575 struct it87_sio_data *sio_data) 1576 { 1577 int err; 1578 u16 chip_type; 1579 const char *board_vendor, *board_name; 1580 1581 err = superio_enter(); 1582 if (err) 1583 return err; 1584 1585 err = -ENODEV; 1586 chip_type = force_id ? force_id : superio_inw(DEVID); 1587 1588 switch (chip_type) { 1589 case IT8705F_DEVID: 1590 sio_data->type = it87; 1591 break; 1592 case IT8712F_DEVID: 1593 sio_data->type = it8712; 1594 break; 1595 case IT8716F_DEVID: 1596 case IT8726F_DEVID: 1597 sio_data->type = it8716; 1598 break; 1599 case IT8718F_DEVID: 1600 sio_data->type = it8718; 1601 break; 1602 case IT8720F_DEVID: 1603 sio_data->type = it8720; 1604 break; 1605 case IT8721F_DEVID: 1606 sio_data->type = it8721; 1607 break; 1608 case 0xffff: /* No device at all */ 1609 goto exit; 1610 default: 1611 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type); 1612 goto exit; 1613 } 1614 1615 superio_select(PME); 1616 if (!(superio_inb(IT87_ACT_REG) & 0x01)) { 1617 pr_info("Device not activated, skipping\n"); 1618 goto exit; 1619 } 1620 1621 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); 1622 if (*address == 0) { 1623 pr_info("Base address not set, skipping\n"); 1624 goto exit; 1625 } 1626 1627 err = 0; 1628 sio_data->revision = superio_inb(DEVREV) & 0x0f; 1629 pr_info("Found IT%04xF chip at 0x%x, revision %d\n", 1630 chip_type, *address, sio_data->revision); 1631 1632 /* in8 (Vbat) is always internal */ 1633 sio_data->internal = (1 << 2); 1634 1635 /* Read GPIO config and VID value from LDN 7 (GPIO) */ 1636 if (sio_data->type == it87) { 1637 /* The IT8705F doesn't have VID pins at all */ 1638 sio_data->skip_vid = 1; 1639 1640 /* The IT8705F has a different LD number for GPIO */ 1641 superio_select(5); 1642 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1643 } else { 1644 int reg; 1645 1646 superio_select(GPIO); 1647 1648 reg = superio_inb(IT87_SIO_GPIO3_REG); 1649 if (sio_data->type == it8721) { 1650 /* The IT8721F/IT8758E doesn't have VID pins at all */ 1651 sio_data->skip_vid = 1; 1652 } else { 1653 /* We need at least 4 VID pins */ 1654 if (reg & 0x0f) { 1655 pr_info("VID is disabled (pins used for GPIO)\n"); 1656 sio_data->skip_vid = 1; 1657 } 1658 } 1659 1660 /* Check if fan3 is there or not */ 1661 if (reg & (1 << 6)) 1662 sio_data->skip_pwm |= (1 << 2); 1663 if (reg & (1 << 7)) 1664 sio_data->skip_fan |= (1 << 2); 1665 1666 /* Check if fan2 is there or not */ 1667 reg = superio_inb(IT87_SIO_GPIO5_REG); 1668 if (reg & (1 << 1)) 1669 sio_data->skip_pwm |= (1 << 1); 1670 if (reg & (1 << 2)) 1671 sio_data->skip_fan |= (1 << 1); 1672 1673 if ((sio_data->type == it8718 || sio_data->type == it8720) 1674 && !(sio_data->skip_vid)) 1675 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG); 1676 1677 reg = superio_inb(IT87_SIO_PINX2_REG); 1678 /* 1679 * The IT8720F has no VIN7 pin, so VCCH should always be 1680 * routed internally to VIN7 with an internal divider. 1681 * Curiously, there still is a configuration bit to control 1682 * this, which means it can be set incorrectly. And even 1683 * more curiously, many boards out there are improperly 1684 * configured, even though the IT8720F datasheet claims 1685 * that the internal routing of VCCH to VIN7 is the default 1686 * setting. So we force the internal routing in this case. 1687 */ 1688 if (sio_data->type == it8720 && !(reg & (1 << 1))) { 1689 reg |= (1 << 1); 1690 superio_outb(IT87_SIO_PINX2_REG, reg); 1691 pr_notice("Routing internal VCCH to in7\n"); 1692 } 1693 if (reg & (1 << 0)) 1694 sio_data->internal |= (1 << 0); 1695 if ((reg & (1 << 1)) || sio_data->type == it8721) 1696 sio_data->internal |= (1 << 1); 1697 1698 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1699 } 1700 if (sio_data->beep_pin) 1701 pr_info("Beeping is supported\n"); 1702 1703 /* Disable specific features based on DMI strings */ 1704 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR); 1705 board_name = dmi_get_system_info(DMI_BOARD_NAME); 1706 if (board_vendor && board_name) { 1707 if (strcmp(board_vendor, "nVIDIA") == 0 1708 && strcmp(board_name, "FN68PT") == 0) { 1709 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not 1710 connected to a fan, but to something else. One user 1711 has reported instant system power-off when changing 1712 the PWM2 duty cycle, so we disable it. 1713 I use the board name string as the trigger in case 1714 the same board is ever used in other systems. */ 1715 pr_info("Disabling pwm2 due to hardware constraints\n"); 1716 sio_data->skip_pwm = (1 << 1); 1717 } 1718 } 1719 1720 exit: 1721 superio_exit(); 1722 return err; 1723 } 1724 1725 static void it87_remove_files(struct device *dev) 1726 { 1727 struct it87_data *data = platform_get_drvdata(pdev); 1728 struct it87_sio_data *sio_data = dev->platform_data; 1729 const struct attribute_group *fan_group = it87_get_fan_group(data); 1730 int i; 1731 1732 sysfs_remove_group(&dev->kobj, &it87_group); 1733 if (sio_data->beep_pin) 1734 sysfs_remove_group(&dev->kobj, &it87_group_beep); 1735 for (i = 0; i < 5; i++) { 1736 if (!(data->has_fan & (1 << i))) 1737 continue; 1738 sysfs_remove_group(&dev->kobj, &fan_group[i]); 1739 if (sio_data->beep_pin) 1740 sysfs_remove_file(&dev->kobj, 1741 it87_attributes_fan_beep[i]); 1742 } 1743 for (i = 0; i < 3; i++) { 1744 if (sio_data->skip_pwm & (1 << 0)) 1745 continue; 1746 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]); 1747 if (has_old_autopwm(data)) 1748 sysfs_remove_group(&dev->kobj, 1749 &it87_group_autopwm[i]); 1750 } 1751 if (!sio_data->skip_vid) 1752 sysfs_remove_group(&dev->kobj, &it87_group_vid); 1753 sysfs_remove_group(&dev->kobj, &it87_group_label); 1754 } 1755 1756 static int __devinit it87_probe(struct platform_device *pdev) 1757 { 1758 struct it87_data *data; 1759 struct resource *res; 1760 struct device *dev = &pdev->dev; 1761 struct it87_sio_data *sio_data = dev->platform_data; 1762 const struct attribute_group *fan_group; 1763 int err = 0, i; 1764 int enable_pwm_interface; 1765 int fan_beep_need_rw; 1766 static const char *names[] = { 1767 "it87", 1768 "it8712", 1769 "it8716", 1770 "it8718", 1771 "it8720", 1772 "it8721", 1773 }; 1774 1775 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1776 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) { 1777 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", 1778 (unsigned long)res->start, 1779 (unsigned long)(res->start + IT87_EC_EXTENT - 1)); 1780 err = -EBUSY; 1781 goto ERROR0; 1782 } 1783 1784 data = kzalloc(sizeof(struct it87_data), GFP_KERNEL); 1785 if (!data) { 1786 err = -ENOMEM; 1787 goto ERROR1; 1788 } 1789 1790 data->addr = res->start; 1791 data->type = sio_data->type; 1792 data->revision = sio_data->revision; 1793 data->name = names[sio_data->type]; 1794 1795 /* Now, we do the remaining detection. */ 1796 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80) 1797 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) { 1798 err = -ENODEV; 1799 goto ERROR2; 1800 } 1801 1802 platform_set_drvdata(pdev, data); 1803 1804 mutex_init(&data->update_lock); 1805 1806 /* Check PWM configuration */ 1807 enable_pwm_interface = it87_check_pwm(dev); 1808 1809 /* Starting with IT8721F, we handle scaling of internal voltages */ 1810 if (data->type == it8721) { 1811 if (sio_data->internal & (1 << 0)) 1812 data->in_scaled |= (1 << 3); /* in3 is AVCC */ 1813 if (sio_data->internal & (1 << 1)) 1814 data->in_scaled |= (1 << 7); /* in7 is VSB */ 1815 if (sio_data->internal & (1 << 2)) 1816 data->in_scaled |= (1 << 8); /* in8 is Vbat */ 1817 } 1818 1819 /* Initialize the IT87 chip */ 1820 it87_init_device(pdev); 1821 1822 /* Register sysfs hooks */ 1823 err = sysfs_create_group(&dev->kobj, &it87_group); 1824 if (err) 1825 goto ERROR2; 1826 1827 if (sio_data->beep_pin) { 1828 err = sysfs_create_group(&dev->kobj, &it87_group_beep); 1829 if (err) 1830 goto ERROR4; 1831 } 1832 1833 /* Do not create fan files for disabled fans */ 1834 fan_group = it87_get_fan_group(data); 1835 fan_beep_need_rw = 1; 1836 for (i = 0; i < 5; i++) { 1837 if (!(data->has_fan & (1 << i))) 1838 continue; 1839 err = sysfs_create_group(&dev->kobj, &fan_group[i]); 1840 if (err) 1841 goto ERROR4; 1842 1843 if (sio_data->beep_pin) { 1844 err = sysfs_create_file(&dev->kobj, 1845 it87_attributes_fan_beep[i]); 1846 if (err) 1847 goto ERROR4; 1848 if (!fan_beep_need_rw) 1849 continue; 1850 1851 /* As we have a single beep enable bit for all fans, 1852 * only the first enabled fan has a writable attribute 1853 * for it. */ 1854 if (sysfs_chmod_file(&dev->kobj, 1855 it87_attributes_fan_beep[i], 1856 S_IRUGO | S_IWUSR)) 1857 dev_dbg(dev, "chmod +w fan%d_beep failed\n", 1858 i + 1); 1859 fan_beep_need_rw = 0; 1860 } 1861 } 1862 1863 if (enable_pwm_interface) { 1864 for (i = 0; i < 3; i++) { 1865 if (sio_data->skip_pwm & (1 << i)) 1866 continue; 1867 err = sysfs_create_group(&dev->kobj, 1868 &it87_group_pwm[i]); 1869 if (err) 1870 goto ERROR4; 1871 1872 if (!has_old_autopwm(data)) 1873 continue; 1874 err = sysfs_create_group(&dev->kobj, 1875 &it87_group_autopwm[i]); 1876 if (err) 1877 goto ERROR4; 1878 } 1879 } 1880 1881 if (!sio_data->skip_vid) { 1882 data->vrm = vid_which_vrm(); 1883 /* VID reading from Super-I/O config space if available */ 1884 data->vid = sio_data->vid_value; 1885 err = sysfs_create_group(&dev->kobj, &it87_group_vid); 1886 if (err) 1887 goto ERROR4; 1888 } 1889 1890 /* Export labels for internal sensors */ 1891 for (i = 0; i < 3; i++) { 1892 if (!(sio_data->internal & (1 << i))) 1893 continue; 1894 err = sysfs_create_file(&dev->kobj, 1895 it87_attributes_label[i]); 1896 if (err) 1897 goto ERROR4; 1898 } 1899 1900 data->hwmon_dev = hwmon_device_register(dev); 1901 if (IS_ERR(data->hwmon_dev)) { 1902 err = PTR_ERR(data->hwmon_dev); 1903 goto ERROR4; 1904 } 1905 1906 return 0; 1907 1908 ERROR4: 1909 it87_remove_files(dev); 1910 ERROR2: 1911 platform_set_drvdata(pdev, NULL); 1912 kfree(data); 1913 ERROR1: 1914 release_region(res->start, IT87_EC_EXTENT); 1915 ERROR0: 1916 return err; 1917 } 1918 1919 static int __devexit it87_remove(struct platform_device *pdev) 1920 { 1921 struct it87_data *data = platform_get_drvdata(pdev); 1922 1923 hwmon_device_unregister(data->hwmon_dev); 1924 it87_remove_files(&pdev->dev); 1925 1926 release_region(data->addr, IT87_EC_EXTENT); 1927 platform_set_drvdata(pdev, NULL); 1928 kfree(data); 1929 1930 return 0; 1931 } 1932 1933 /* Must be called with data->update_lock held, except during initialization. 1934 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1935 would slow down the IT87 access and should not be necessary. */ 1936 static int it87_read_value(struct it87_data *data, u8 reg) 1937 { 1938 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1939 return inb_p(data->addr + IT87_DATA_REG_OFFSET); 1940 } 1941 1942 /* Must be called with data->update_lock held, except during initialization. 1943 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1944 would slow down the IT87 access and should not be necessary. */ 1945 static void it87_write_value(struct it87_data *data, u8 reg, u8 value) 1946 { 1947 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1948 outb_p(value, data->addr + IT87_DATA_REG_OFFSET); 1949 } 1950 1951 /* Return 1 if and only if the PWM interface is safe to use */ 1952 static int __devinit it87_check_pwm(struct device *dev) 1953 { 1954 struct it87_data *data = dev_get_drvdata(dev); 1955 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off 1956 * and polarity set to active low is sign that this is the case so we 1957 * disable pwm control to protect the user. */ 1958 int tmp = it87_read_value(data, IT87_REG_FAN_CTL); 1959 if ((tmp & 0x87) == 0) { 1960 if (fix_pwm_polarity) { 1961 /* The user asks us to attempt a chip reconfiguration. 1962 * This means switching to active high polarity and 1963 * inverting all fan speed values. */ 1964 int i; 1965 u8 pwm[3]; 1966 1967 for (i = 0; i < 3; i++) 1968 pwm[i] = it87_read_value(data, 1969 IT87_REG_PWM(i)); 1970 1971 /* If any fan is in automatic pwm mode, the polarity 1972 * might be correct, as suspicious as it seems, so we 1973 * better don't change anything (but still disable the 1974 * PWM interface). */ 1975 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) { 1976 dev_info(dev, "Reconfiguring PWM to " 1977 "active high polarity\n"); 1978 it87_write_value(data, IT87_REG_FAN_CTL, 1979 tmp | 0x87); 1980 for (i = 0; i < 3; i++) 1981 it87_write_value(data, 1982 IT87_REG_PWM(i), 1983 0x7f & ~pwm[i]); 1984 return 1; 1985 } 1986 1987 dev_info(dev, "PWM configuration is " 1988 "too broken to be fixed\n"); 1989 } 1990 1991 dev_info(dev, "Detected broken BIOS " 1992 "defaults, disabling PWM interface\n"); 1993 return 0; 1994 } else if (fix_pwm_polarity) { 1995 dev_info(dev, "PWM configuration looks " 1996 "sane, won't touch\n"); 1997 } 1998 1999 return 1; 2000 } 2001 2002 /* Called when we have found a new IT87. */ 2003 static void __devinit it87_init_device(struct platform_device *pdev) 2004 { 2005 struct it87_sio_data *sio_data = pdev->dev.platform_data; 2006 struct it87_data *data = platform_get_drvdata(pdev); 2007 int tmp, i; 2008 u8 mask; 2009 2010 /* For each PWM channel: 2011 * - If it is in automatic mode, setting to manual mode should set 2012 * the fan to full speed by default. 2013 * - If it is in manual mode, we need a mapping to temperature 2014 * channels to use when later setting to automatic mode later. 2015 * Use a 1:1 mapping by default (we are clueless.) 2016 * In both cases, the value can (and should) be changed by the user 2017 * prior to switching to a different mode. 2018 * Note that this is no longer needed for the IT8721F and later, as 2019 * these have separate registers for the temperature mapping and the 2020 * manual duty cycle. */ 2021 for (i = 0; i < 3; i++) { 2022 data->pwm_temp_map[i] = i; 2023 data->pwm_duty[i] = 0x7f; /* Full speed */ 2024 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */ 2025 } 2026 2027 /* Some chips seem to have default value 0xff for all limit 2028 * registers. For low voltage limits it makes no sense and triggers 2029 * alarms, so change to 0 instead. For high temperature limits, it 2030 * means -1 degree C, which surprisingly doesn't trigger an alarm, 2031 * but is still confusing, so change to 127 degrees C. */ 2032 for (i = 0; i < 8; i++) { 2033 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i)); 2034 if (tmp == 0xff) 2035 it87_write_value(data, IT87_REG_VIN_MIN(i), 0); 2036 } 2037 for (i = 0; i < 3; i++) { 2038 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 2039 if (tmp == 0xff) 2040 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127); 2041 } 2042 2043 /* Temperature channels are not forcibly enabled, as they can be 2044 * set to two different sensor types and we can't guess which one 2045 * is correct for a given system. These channels can be enabled at 2046 * run-time through the temp{1-3}_type sysfs accessors if needed. */ 2047 2048 /* Check if voltage monitors are reset manually or by some reason */ 2049 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE); 2050 if ((tmp & 0xff) == 0) { 2051 /* Enable all voltage monitors */ 2052 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff); 2053 } 2054 2055 /* Check if tachometers are reset manually or by some reason */ 2056 mask = 0x70 & ~(sio_data->skip_fan << 4); 2057 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL); 2058 if ((data->fan_main_ctrl & mask) == 0) { 2059 /* Enable all fan tachometers */ 2060 data->fan_main_ctrl |= mask; 2061 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 2062 data->fan_main_ctrl); 2063 } 2064 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07; 2065 2066 /* Set tachometers to 16-bit mode if needed */ 2067 if (has_16bit_fans(data)) { 2068 tmp = it87_read_value(data, IT87_REG_FAN_16BIT); 2069 if (~tmp & 0x07 & data->has_fan) { 2070 dev_dbg(&pdev->dev, 2071 "Setting fan1-3 to 16-bit mode\n"); 2072 it87_write_value(data, IT87_REG_FAN_16BIT, 2073 tmp | 0x07); 2074 } 2075 /* IT8705F only supports three fans. */ 2076 if (data->type != it87) { 2077 if (tmp & (1 << 4)) 2078 data->has_fan |= (1 << 3); /* fan4 enabled */ 2079 if (tmp & (1 << 5)) 2080 data->has_fan |= (1 << 4); /* fan5 enabled */ 2081 } 2082 } 2083 2084 /* Fan input pins may be used for alternative functions */ 2085 data->has_fan &= ~sio_data->skip_fan; 2086 2087 /* Start monitoring */ 2088 it87_write_value(data, IT87_REG_CONFIG, 2089 (it87_read_value(data, IT87_REG_CONFIG) & 0x36) 2090 | (update_vbat ? 0x41 : 0x01)); 2091 } 2092 2093 static void it87_update_pwm_ctrl(struct it87_data *data, int nr) 2094 { 2095 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr)); 2096 if (data->type == it8721) { 2097 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03; 2098 data->pwm_duty[nr] = it87_read_value(data, 2099 IT87_REG_PWM_DUTY(nr)); 2100 } else { 2101 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */ 2102 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03; 2103 else /* Manual mode */ 2104 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f; 2105 } 2106 2107 if (has_old_autopwm(data)) { 2108 int i; 2109 2110 for (i = 0; i < 5 ; i++) 2111 data->auto_temp[nr][i] = it87_read_value(data, 2112 IT87_REG_AUTO_TEMP(nr, i)); 2113 for (i = 0; i < 3 ; i++) 2114 data->auto_pwm[nr][i] = it87_read_value(data, 2115 IT87_REG_AUTO_PWM(nr, i)); 2116 } 2117 } 2118 2119 static struct it87_data *it87_update_device(struct device *dev) 2120 { 2121 struct it87_data *data = dev_get_drvdata(dev); 2122 int i; 2123 2124 mutex_lock(&data->update_lock); 2125 2126 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 2127 || !data->valid) { 2128 if (update_vbat) { 2129 /* Cleared after each update, so reenable. Value 2130 returned by this read will be previous value */ 2131 it87_write_value(data, IT87_REG_CONFIG, 2132 it87_read_value(data, IT87_REG_CONFIG) | 0x40); 2133 } 2134 for (i = 0; i <= 7; i++) { 2135 data->in[i] = 2136 it87_read_value(data, IT87_REG_VIN(i)); 2137 data->in_min[i] = 2138 it87_read_value(data, IT87_REG_VIN_MIN(i)); 2139 data->in_max[i] = 2140 it87_read_value(data, IT87_REG_VIN_MAX(i)); 2141 } 2142 /* in8 (battery) has no limit registers */ 2143 data->in[8] = it87_read_value(data, IT87_REG_VIN(8)); 2144 2145 for (i = 0; i < 5; i++) { 2146 /* Skip disabled fans */ 2147 if (!(data->has_fan & (1 << i))) 2148 continue; 2149 2150 data->fan_min[i] = 2151 it87_read_value(data, IT87_REG_FAN_MIN[i]); 2152 data->fan[i] = it87_read_value(data, 2153 IT87_REG_FAN[i]); 2154 /* Add high byte if in 16-bit mode */ 2155 if (has_16bit_fans(data)) { 2156 data->fan[i] |= it87_read_value(data, 2157 IT87_REG_FANX[i]) << 8; 2158 data->fan_min[i] |= it87_read_value(data, 2159 IT87_REG_FANX_MIN[i]) << 8; 2160 } 2161 } 2162 for (i = 0; i < 3; i++) { 2163 data->temp[i] = 2164 it87_read_value(data, IT87_REG_TEMP(i)); 2165 data->temp_high[i] = 2166 it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 2167 data->temp_low[i] = 2168 it87_read_value(data, IT87_REG_TEMP_LOW(i)); 2169 } 2170 2171 /* Newer chips don't have clock dividers */ 2172 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) { 2173 i = it87_read_value(data, IT87_REG_FAN_DIV); 2174 data->fan_div[0] = i & 0x07; 2175 data->fan_div[1] = (i >> 3) & 0x07; 2176 data->fan_div[2] = (i & 0x40) ? 3 : 1; 2177 } 2178 2179 data->alarms = 2180 it87_read_value(data, IT87_REG_ALARM1) | 2181 (it87_read_value(data, IT87_REG_ALARM2) << 8) | 2182 (it87_read_value(data, IT87_REG_ALARM3) << 16); 2183 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE); 2184 2185 data->fan_main_ctrl = it87_read_value(data, 2186 IT87_REG_FAN_MAIN_CTRL); 2187 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL); 2188 for (i = 0; i < 3; i++) 2189 it87_update_pwm_ctrl(data, i); 2190 2191 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE); 2192 /* The 8705 does not have VID capability. 2193 The 8718 and later don't use IT87_REG_VID for the 2194 same purpose. */ 2195 if (data->type == it8712 || data->type == it8716) { 2196 data->vid = it87_read_value(data, IT87_REG_VID); 2197 /* The older IT8712F revisions had only 5 VID pins, 2198 but we assume it is always safe to read 6 bits. */ 2199 data->vid &= 0x3f; 2200 } 2201 data->last_updated = jiffies; 2202 data->valid = 1; 2203 } 2204 2205 mutex_unlock(&data->update_lock); 2206 2207 return data; 2208 } 2209 2210 static int __init it87_device_add(unsigned short address, 2211 const struct it87_sio_data *sio_data) 2212 { 2213 struct resource res = { 2214 .start = address + IT87_EC_OFFSET, 2215 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1, 2216 .name = DRVNAME, 2217 .flags = IORESOURCE_IO, 2218 }; 2219 int err; 2220 2221 err = acpi_check_resource_conflict(&res); 2222 if (err) 2223 goto exit; 2224 2225 pdev = platform_device_alloc(DRVNAME, address); 2226 if (!pdev) { 2227 err = -ENOMEM; 2228 pr_err("Device allocation failed\n"); 2229 goto exit; 2230 } 2231 2232 err = platform_device_add_resources(pdev, &res, 1); 2233 if (err) { 2234 pr_err("Device resource addition failed (%d)\n", err); 2235 goto exit_device_put; 2236 } 2237 2238 err = platform_device_add_data(pdev, sio_data, 2239 sizeof(struct it87_sio_data)); 2240 if (err) { 2241 pr_err("Platform data allocation failed\n"); 2242 goto exit_device_put; 2243 } 2244 2245 err = platform_device_add(pdev); 2246 if (err) { 2247 pr_err("Device addition failed (%d)\n", err); 2248 goto exit_device_put; 2249 } 2250 2251 return 0; 2252 2253 exit_device_put: 2254 platform_device_put(pdev); 2255 exit: 2256 return err; 2257 } 2258 2259 static int __init sm_it87_init(void) 2260 { 2261 int err; 2262 unsigned short isa_address = 0; 2263 struct it87_sio_data sio_data; 2264 2265 memset(&sio_data, 0, sizeof(struct it87_sio_data)); 2266 err = it87_find(&isa_address, &sio_data); 2267 if (err) 2268 return err; 2269 err = platform_driver_register(&it87_driver); 2270 if (err) 2271 return err; 2272 2273 err = it87_device_add(isa_address, &sio_data); 2274 if (err) { 2275 platform_driver_unregister(&it87_driver); 2276 return err; 2277 } 2278 2279 return 0; 2280 } 2281 2282 static void __exit sm_it87_exit(void) 2283 { 2284 platform_device_unregister(pdev); 2285 platform_driver_unregister(&it87_driver); 2286 } 2287 2288 2289 MODULE_AUTHOR("Chris Gauthron, " 2290 "Jean Delvare <khali@linux-fr.org>"); 2291 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver"); 2292 module_param(update_vbat, bool, 0); 2293 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); 2294 module_param(fix_pwm_polarity, bool, 0); 2295 MODULE_PARM_DESC(fix_pwm_polarity, 2296 "Force PWM polarity to active high (DANGEROUS)"); 2297 MODULE_LICENSE("GPL"); 2298 2299 module_init(sm_it87_init); 2300 module_exit(sm_it87_exit); 2301