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 * IT8726F Super I/O chip w/LPC interface 19 * Sis950 A clone of the IT8705F 20 * 21 * Copyright (C) 2001 Chris Gauthron 22 * Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org> 23 * 24 * This program is free software; you can redistribute it and/or modify 25 * it under the terms of the GNU General Public License as published by 26 * the Free Software Foundation; either version 2 of the License, or 27 * (at your option) any later version. 28 * 29 * This program is distributed in the hope that it will be useful, 30 * but WITHOUT ANY WARRANTY; without even the implied warranty of 31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 32 * GNU General Public License for more details. 33 * 34 * You should have received a copy of the GNU General Public License 35 * along with this program; if not, write to the Free Software 36 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 37 */ 38 39 #include <linux/module.h> 40 #include <linux/init.h> 41 #include <linux/slab.h> 42 #include <linux/jiffies.h> 43 #include <linux/platform_device.h> 44 #include <linux/hwmon.h> 45 #include <linux/hwmon-sysfs.h> 46 #include <linux/hwmon-vid.h> 47 #include <linux/err.h> 48 #include <linux/mutex.h> 49 #include <linux/sysfs.h> 50 #include <linux/string.h> 51 #include <linux/dmi.h> 52 #include <linux/acpi.h> 53 #include <linux/io.h> 54 55 #define DRVNAME "it87" 56 57 enum chips { it87, it8712, it8716, it8718, it8720 }; 58 59 static unsigned short force_id; 60 module_param(force_id, ushort, 0); 61 MODULE_PARM_DESC(force_id, "Override the detected device ID"); 62 63 static struct platform_device *pdev; 64 65 #define REG 0x2e /* The register to read/write */ 66 #define DEV 0x07 /* Register: Logical device select */ 67 #define VAL 0x2f /* The value to read/write */ 68 #define PME 0x04 /* The device with the fan registers in it */ 69 70 /* The device with the IT8718F/IT8720F VID value in it */ 71 #define GPIO 0x07 72 73 #define DEVID 0x20 /* Register: Device ID */ 74 #define DEVREV 0x22 /* Register: Device Revision */ 75 76 static inline int 77 superio_inb(int reg) 78 { 79 outb(reg, REG); 80 return inb(VAL); 81 } 82 83 static int superio_inw(int reg) 84 { 85 int val; 86 outb(reg++, REG); 87 val = inb(VAL) << 8; 88 outb(reg, REG); 89 val |= inb(VAL); 90 return val; 91 } 92 93 static inline void 94 superio_select(int ldn) 95 { 96 outb(DEV, REG); 97 outb(ldn, VAL); 98 } 99 100 static inline void 101 superio_enter(void) 102 { 103 outb(0x87, REG); 104 outb(0x01, REG); 105 outb(0x55, REG); 106 outb(0x55, REG); 107 } 108 109 static inline void 110 superio_exit(void) 111 { 112 outb(0x02, REG); 113 outb(0x02, VAL); 114 } 115 116 /* Logical device 4 registers */ 117 #define IT8712F_DEVID 0x8712 118 #define IT8705F_DEVID 0x8705 119 #define IT8716F_DEVID 0x8716 120 #define IT8718F_DEVID 0x8718 121 #define IT8720F_DEVID 0x8720 122 #define IT8726F_DEVID 0x8726 123 #define IT87_ACT_REG 0x30 124 #define IT87_BASE_REG 0x60 125 126 /* Logical device 7 registers (IT8712F and later) */ 127 #define IT87_SIO_GPIO3_REG 0x27 128 #define IT87_SIO_GPIO5_REG 0x29 129 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */ 130 #define IT87_SIO_VID_REG 0xfc /* VID value */ 131 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */ 132 133 /* Update battery voltage after every reading if true */ 134 static int update_vbat; 135 136 /* Not all BIOSes properly configure the PWM registers */ 137 static int fix_pwm_polarity; 138 139 /* Many IT87 constants specified below */ 140 141 /* Length of ISA address segment */ 142 #define IT87_EXTENT 8 143 144 /* Length of ISA address segment for Environmental Controller */ 145 #define IT87_EC_EXTENT 2 146 147 /* Offset of EC registers from ISA base address */ 148 #define IT87_EC_OFFSET 5 149 150 /* Where are the ISA address/data registers relative to the EC base address */ 151 #define IT87_ADDR_REG_OFFSET 0 152 #define IT87_DATA_REG_OFFSET 1 153 154 /*----- The IT87 registers -----*/ 155 156 #define IT87_REG_CONFIG 0x00 157 158 #define IT87_REG_ALARM1 0x01 159 #define IT87_REG_ALARM2 0x02 160 #define IT87_REG_ALARM3 0x03 161 162 /* The IT8718F and IT8720F have the VID value in a different register, in 163 Super-I/O configuration space. */ 164 #define IT87_REG_VID 0x0a 165 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b 166 for fan divisors. Later IT8712F revisions must use 16-bit tachometer 167 mode. */ 168 #define IT87_REG_FAN_DIV 0x0b 169 #define IT87_REG_FAN_16BIT 0x0c 170 171 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */ 172 173 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 }; 174 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 }; 175 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 }; 176 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 }; 177 #define IT87_REG_FAN_MAIN_CTRL 0x13 178 #define IT87_REG_FAN_CTL 0x14 179 #define IT87_REG_PWM(nr) (0x15 + (nr)) 180 181 #define IT87_REG_VIN(nr) (0x20 + (nr)) 182 #define IT87_REG_TEMP(nr) (0x29 + (nr)) 183 184 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2) 185 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2) 186 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2) 187 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2) 188 189 #define IT87_REG_VIN_ENABLE 0x50 190 #define IT87_REG_TEMP_ENABLE 0x51 191 #define IT87_REG_BEEP_ENABLE 0x5c 192 193 #define IT87_REG_CHIPID 0x58 194 195 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i)) 196 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i)) 197 198 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255)) 199 #define IN_FROM_REG(val) ((val) * 16) 200 201 static inline u8 FAN_TO_REG(long rpm, int div) 202 { 203 if (rpm == 0) 204 return 255; 205 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 206 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 207 254); 208 } 209 210 static inline u16 FAN16_TO_REG(long rpm) 211 { 212 if (rpm == 0) 213 return 0xffff; 214 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe); 215 } 216 217 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div))) 218 /* The divider is fixed to 2 in 16-bit mode */ 219 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2)) 220 221 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\ 222 ((val)+500)/1000),-128,127)) 223 #define TEMP_FROM_REG(val) ((val) * 1000) 224 225 #define PWM_TO_REG(val) ((val) >> 1) 226 #define PWM_FROM_REG(val) (((val)&0x7f) << 1) 227 228 static int DIV_TO_REG(int val) 229 { 230 int answer = 0; 231 while (answer < 7 && (val >>= 1)) 232 answer++; 233 return answer; 234 } 235 #define DIV_FROM_REG(val) (1 << (val)) 236 237 static const unsigned int pwm_freq[8] = { 238 48000000 / 128, 239 24000000 / 128, 240 12000000 / 128, 241 8000000 / 128, 242 6000000 / 128, 243 3000000 / 128, 244 1500000 / 128, 245 750000 / 128, 246 }; 247 248 249 struct it87_sio_data { 250 enum chips type; 251 /* Values read from Super-I/O config space */ 252 u8 revision; 253 u8 vid_value; 254 u8 beep_pin; 255 /* Features skipped based on config or DMI */ 256 u8 skip_vid; 257 u8 skip_fan; 258 u8 skip_pwm; 259 }; 260 261 /* For each registered chip, we need to keep some data in memory. 262 The structure is dynamically allocated. */ 263 struct it87_data { 264 struct device *hwmon_dev; 265 enum chips type; 266 u8 revision; 267 268 unsigned short addr; 269 const char *name; 270 struct mutex update_lock; 271 char valid; /* !=0 if following fields are valid */ 272 unsigned long last_updated; /* In jiffies */ 273 274 u8 in[9]; /* Register value */ 275 u8 in_max[8]; /* Register value */ 276 u8 in_min[8]; /* Register value */ 277 u8 has_fan; /* Bitfield, fans enabled */ 278 u16 fan[5]; /* Register values, possibly combined */ 279 u16 fan_min[5]; /* Register values, possibly combined */ 280 s8 temp[3]; /* Register value */ 281 s8 temp_high[3]; /* Register value */ 282 s8 temp_low[3]; /* Register value */ 283 u8 sensor; /* Register value */ 284 u8 fan_div[3]; /* Register encoding, shifted right */ 285 u8 vid; /* Register encoding, combined */ 286 u8 vrm; 287 u32 alarms; /* Register encoding, combined */ 288 u8 beeps; /* Register encoding */ 289 u8 fan_main_ctrl; /* Register value */ 290 u8 fan_ctl; /* Register value */ 291 292 /* The following 3 arrays correspond to the same registers. The 293 * meaning of bits 6-0 depends on the value of bit 7, and we want 294 * to preserve settings on mode changes, so we have to track all 295 * values separately. */ 296 u8 pwm_ctrl[3]; /* Register value */ 297 u8 pwm_duty[3]; /* Manual PWM value set by user (bit 6-0) */ 298 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */ 299 300 /* Automatic fan speed control registers */ 301 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */ 302 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */ 303 }; 304 305 static inline int has_16bit_fans(const struct it87_data *data) 306 { 307 /* IT8705F Datasheet 0.4.1, 3h == Version G. 308 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J. 309 These are the first revisions with 16bit tachometer support. */ 310 return (data->type == it87 && data->revision >= 0x03) 311 || (data->type == it8712 && data->revision >= 0x08) 312 || data->type == it8716 313 || data->type == it8718 314 || data->type == it8720; 315 } 316 317 static inline int has_old_autopwm(const struct it87_data *data) 318 { 319 /* The old automatic fan speed control interface is implemented 320 by IT8705F chips up to revision F and IT8712F chips up to 321 revision G. */ 322 return (data->type == it87 && data->revision < 0x03) 323 || (data->type == it8712 && data->revision < 0x08); 324 } 325 326 static int it87_probe(struct platform_device *pdev); 327 static int __devexit it87_remove(struct platform_device *pdev); 328 329 static int it87_read_value(struct it87_data *data, u8 reg); 330 static void it87_write_value(struct it87_data *data, u8 reg, u8 value); 331 static struct it87_data *it87_update_device(struct device *dev); 332 static int it87_check_pwm(struct device *dev); 333 static void it87_init_device(struct platform_device *pdev); 334 335 336 static struct platform_driver it87_driver = { 337 .driver = { 338 .owner = THIS_MODULE, 339 .name = DRVNAME, 340 }, 341 .probe = it87_probe, 342 .remove = __devexit_p(it87_remove), 343 }; 344 345 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 346 char *buf) 347 { 348 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 349 int nr = sensor_attr->index; 350 351 struct it87_data *data = it87_update_device(dev); 352 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); 353 } 354 355 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 356 char *buf) 357 { 358 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 359 int nr = sensor_attr->index; 360 361 struct it87_data *data = it87_update_device(dev); 362 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); 363 } 364 365 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 366 char *buf) 367 { 368 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 369 int nr = sensor_attr->index; 370 371 struct it87_data *data = it87_update_device(dev); 372 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); 373 } 374 375 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 376 const char *buf, size_t count) 377 { 378 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 379 int nr = sensor_attr->index; 380 381 struct it87_data *data = dev_get_drvdata(dev); 382 unsigned long val; 383 384 if (strict_strtoul(buf, 10, &val) < 0) 385 return -EINVAL; 386 387 mutex_lock(&data->update_lock); 388 data->in_min[nr] = IN_TO_REG(val); 389 it87_write_value(data, IT87_REG_VIN_MIN(nr), 390 data->in_min[nr]); 391 mutex_unlock(&data->update_lock); 392 return count; 393 } 394 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 395 const char *buf, size_t count) 396 { 397 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 398 int nr = sensor_attr->index; 399 400 struct it87_data *data = dev_get_drvdata(dev); 401 unsigned long val; 402 403 if (strict_strtoul(buf, 10, &val) < 0) 404 return -EINVAL; 405 406 mutex_lock(&data->update_lock); 407 data->in_max[nr] = IN_TO_REG(val); 408 it87_write_value(data, IT87_REG_VIN_MAX(nr), 409 data->in_max[nr]); 410 mutex_unlock(&data->update_lock); 411 return count; 412 } 413 414 #define show_in_offset(offset) \ 415 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 416 show_in, NULL, offset); 417 418 #define limit_in_offset(offset) \ 419 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 420 show_in_min, set_in_min, offset); \ 421 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 422 show_in_max, set_in_max, offset); 423 424 show_in_offset(0); 425 limit_in_offset(0); 426 show_in_offset(1); 427 limit_in_offset(1); 428 show_in_offset(2); 429 limit_in_offset(2); 430 show_in_offset(3); 431 limit_in_offset(3); 432 show_in_offset(4); 433 limit_in_offset(4); 434 show_in_offset(5); 435 limit_in_offset(5); 436 show_in_offset(6); 437 limit_in_offset(6); 438 show_in_offset(7); 439 limit_in_offset(7); 440 show_in_offset(8); 441 442 /* 3 temperatures */ 443 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 444 char *buf) 445 { 446 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 447 int nr = sensor_attr->index; 448 449 struct it87_data *data = it87_update_device(dev); 450 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 451 } 452 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 453 char *buf) 454 { 455 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 456 int nr = sensor_attr->index; 457 458 struct it87_data *data = it87_update_device(dev); 459 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); 460 } 461 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 462 char *buf) 463 { 464 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 465 int nr = sensor_attr->index; 466 467 struct it87_data *data = it87_update_device(dev); 468 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); 469 } 470 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 471 const char *buf, size_t count) 472 { 473 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 474 int nr = sensor_attr->index; 475 476 struct it87_data *data = dev_get_drvdata(dev); 477 long val; 478 479 if (strict_strtol(buf, 10, &val) < 0) 480 return -EINVAL; 481 482 mutex_lock(&data->update_lock); 483 data->temp_high[nr] = TEMP_TO_REG(val); 484 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); 485 mutex_unlock(&data->update_lock); 486 return count; 487 } 488 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 489 const char *buf, size_t count) 490 { 491 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 492 int nr = sensor_attr->index; 493 494 struct it87_data *data = dev_get_drvdata(dev); 495 long val; 496 497 if (strict_strtol(buf, 10, &val) < 0) 498 return -EINVAL; 499 500 mutex_lock(&data->update_lock); 501 data->temp_low[nr] = TEMP_TO_REG(val); 502 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); 503 mutex_unlock(&data->update_lock); 504 return count; 505 } 506 #define show_temp_offset(offset) \ 507 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 508 show_temp, NULL, offset - 1); \ 509 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 510 show_temp_max, set_temp_max, offset - 1); \ 511 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 512 show_temp_min, set_temp_min, offset - 1); 513 514 show_temp_offset(1); 515 show_temp_offset(2); 516 show_temp_offset(3); 517 518 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, 519 char *buf) 520 { 521 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 522 int nr = sensor_attr->index; 523 524 struct it87_data *data = it87_update_device(dev); 525 u8 reg = data->sensor; /* In case the value is updated while 526 we use it */ 527 528 if (reg & (1 << nr)) 529 return sprintf(buf, "3\n"); /* thermal diode */ 530 if (reg & (8 << nr)) 531 return sprintf(buf, "4\n"); /* thermistor */ 532 return sprintf(buf, "0\n"); /* disabled */ 533 } 534 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, 535 const char *buf, size_t count) 536 { 537 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 538 int nr = sensor_attr->index; 539 540 struct it87_data *data = dev_get_drvdata(dev); 541 long val; 542 543 if (strict_strtol(buf, 10, &val) < 0) 544 return -EINVAL; 545 546 mutex_lock(&data->update_lock); 547 548 data->sensor &= ~(1 << nr); 549 data->sensor &= ~(8 << nr); 550 if (val == 2) { /* backwards compatibility */ 551 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 " 552 "instead\n"); 553 val = 4; 554 } 555 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */ 556 if (val == 3) 557 data->sensor |= 1 << nr; 558 else if (val == 4) 559 data->sensor |= 8 << nr; 560 else if (val != 0) { 561 mutex_unlock(&data->update_lock); 562 return -EINVAL; 563 } 564 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor); 565 mutex_unlock(&data->update_lock); 566 return count; 567 } 568 #define show_sensor_offset(offset) \ 569 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ 570 show_sensor, set_sensor, offset - 1); 571 572 show_sensor_offset(1); 573 show_sensor_offset(2); 574 show_sensor_offset(3); 575 576 /* 3 Fans */ 577 578 static int pwm_mode(const struct it87_data *data, int nr) 579 { 580 int ctrl = data->fan_main_ctrl & (1 << nr); 581 582 if (ctrl == 0) /* Full speed */ 583 return 0; 584 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */ 585 return 2; 586 else /* Manual mode */ 587 return 1; 588 } 589 590 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 591 char *buf) 592 { 593 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 594 int nr = sensor_attr->index; 595 596 struct it87_data *data = it87_update_device(dev); 597 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 598 DIV_FROM_REG(data->fan_div[nr]))); 599 } 600 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 601 char *buf) 602 { 603 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 604 int nr = sensor_attr->index; 605 606 struct it87_data *data = it87_update_device(dev); 607 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 608 DIV_FROM_REG(data->fan_div[nr]))); 609 } 610 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 611 char *buf) 612 { 613 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 614 int nr = sensor_attr->index; 615 616 struct it87_data *data = it87_update_device(dev); 617 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 618 } 619 static ssize_t show_pwm_enable(struct device *dev, 620 struct device_attribute *attr, char *buf) 621 { 622 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 623 int nr = sensor_attr->index; 624 625 struct it87_data *data = it87_update_device(dev); 626 return sprintf(buf, "%d\n", pwm_mode(data, nr)); 627 } 628 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 629 char *buf) 630 { 631 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 632 int nr = sensor_attr->index; 633 634 struct it87_data *data = it87_update_device(dev); 635 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm_duty[nr])); 636 } 637 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr, 638 char *buf) 639 { 640 struct it87_data *data = it87_update_device(dev); 641 int index = (data->fan_ctl >> 4) & 0x07; 642 643 return sprintf(buf, "%u\n", pwm_freq[index]); 644 } 645 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 646 const char *buf, size_t count) 647 { 648 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 649 int nr = sensor_attr->index; 650 651 struct it87_data *data = dev_get_drvdata(dev); 652 long val; 653 u8 reg; 654 655 if (strict_strtol(buf, 10, &val) < 0) 656 return -EINVAL; 657 658 mutex_lock(&data->update_lock); 659 reg = it87_read_value(data, IT87_REG_FAN_DIV); 660 switch (nr) { 661 case 0: 662 data->fan_div[nr] = reg & 0x07; 663 break; 664 case 1: 665 data->fan_div[nr] = (reg >> 3) & 0x07; 666 break; 667 case 2: 668 data->fan_div[nr] = (reg & 0x40) ? 3 : 1; 669 break; 670 } 671 672 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 673 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 674 mutex_unlock(&data->update_lock); 675 return count; 676 } 677 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 678 const char *buf, size_t count) 679 { 680 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 681 int nr = sensor_attr->index; 682 683 struct it87_data *data = dev_get_drvdata(dev); 684 unsigned long val; 685 int min; 686 u8 old; 687 688 if (strict_strtoul(buf, 10, &val) < 0) 689 return -EINVAL; 690 691 mutex_lock(&data->update_lock); 692 old = it87_read_value(data, IT87_REG_FAN_DIV); 693 694 /* Save fan min limit */ 695 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 696 697 switch (nr) { 698 case 0: 699 case 1: 700 data->fan_div[nr] = DIV_TO_REG(val); 701 break; 702 case 2: 703 if (val < 8) 704 data->fan_div[nr] = 1; 705 else 706 data->fan_div[nr] = 3; 707 } 708 val = old & 0x80; 709 val |= (data->fan_div[0] & 0x07); 710 val |= (data->fan_div[1] & 0x07) << 3; 711 if (data->fan_div[2] == 3) 712 val |= 0x1 << 6; 713 it87_write_value(data, IT87_REG_FAN_DIV, val); 714 715 /* Restore fan min limit */ 716 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 717 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 718 719 mutex_unlock(&data->update_lock); 720 return count; 721 } 722 723 /* Returns 0 if OK, -EINVAL otherwise */ 724 static int check_trip_points(struct device *dev, int nr) 725 { 726 const struct it87_data *data = dev_get_drvdata(dev); 727 int i, err = 0; 728 729 if (has_old_autopwm(data)) { 730 for (i = 0; i < 3; i++) { 731 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1]) 732 err = -EINVAL; 733 } 734 for (i = 0; i < 2; i++) { 735 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1]) 736 err = -EINVAL; 737 } 738 } 739 740 if (err) { 741 dev_err(dev, "Inconsistent trip points, not switching to " 742 "automatic mode\n"); 743 dev_err(dev, "Adjust the trip points and try again\n"); 744 } 745 return err; 746 } 747 748 static ssize_t set_pwm_enable(struct device *dev, 749 struct device_attribute *attr, const char *buf, size_t count) 750 { 751 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 752 int nr = sensor_attr->index; 753 754 struct it87_data *data = dev_get_drvdata(dev); 755 long val; 756 757 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2) 758 return -EINVAL; 759 760 /* Check trip points before switching to automatic mode */ 761 if (val == 2) { 762 if (check_trip_points(dev, nr) < 0) 763 return -EINVAL; 764 } 765 766 mutex_lock(&data->update_lock); 767 768 if (val == 0) { 769 int tmp; 770 /* make sure the fan is on when in on/off mode */ 771 tmp = it87_read_value(data, IT87_REG_FAN_CTL); 772 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr)); 773 /* set on/off mode */ 774 data->fan_main_ctrl &= ~(1 << nr); 775 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 776 data->fan_main_ctrl); 777 } else { 778 if (val == 1) /* Manual mode */ 779 data->pwm_ctrl[nr] = data->pwm_duty[nr]; 780 else /* Automatic mode */ 781 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 782 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 783 /* set SmartGuardian mode */ 784 data->fan_main_ctrl |= (1 << nr); 785 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 786 data->fan_main_ctrl); 787 } 788 789 mutex_unlock(&data->update_lock); 790 return count; 791 } 792 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 793 const char *buf, size_t count) 794 { 795 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 796 int nr = sensor_attr->index; 797 798 struct it87_data *data = dev_get_drvdata(dev); 799 long val; 800 801 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255) 802 return -EINVAL; 803 804 mutex_lock(&data->update_lock); 805 data->pwm_duty[nr] = PWM_TO_REG(val); 806 /* If we are in manual mode, write the duty cycle immediately; 807 * otherwise, just store it for later use. */ 808 if (!(data->pwm_ctrl[nr] & 0x80)) { 809 data->pwm_ctrl[nr] = data->pwm_duty[nr]; 810 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 811 } 812 mutex_unlock(&data->update_lock); 813 return count; 814 } 815 static ssize_t set_pwm_freq(struct device *dev, 816 struct device_attribute *attr, const char *buf, size_t count) 817 { 818 struct it87_data *data = dev_get_drvdata(dev); 819 unsigned long val; 820 int i; 821 822 if (strict_strtoul(buf, 10, &val) < 0) 823 return -EINVAL; 824 825 /* Search for the nearest available frequency */ 826 for (i = 0; i < 7; i++) { 827 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2) 828 break; 829 } 830 831 mutex_lock(&data->update_lock); 832 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f; 833 data->fan_ctl |= i << 4; 834 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl); 835 mutex_unlock(&data->update_lock); 836 837 return count; 838 } 839 static ssize_t show_pwm_temp_map(struct device *dev, 840 struct device_attribute *attr, char *buf) 841 { 842 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 843 int nr = sensor_attr->index; 844 845 struct it87_data *data = it87_update_device(dev); 846 int map; 847 848 if (data->pwm_temp_map[nr] < 3) 849 map = 1 << data->pwm_temp_map[nr]; 850 else 851 map = 0; /* Should never happen */ 852 return sprintf(buf, "%d\n", map); 853 } 854 static ssize_t set_pwm_temp_map(struct device *dev, 855 struct device_attribute *attr, const char *buf, size_t count) 856 { 857 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 858 int nr = sensor_attr->index; 859 860 struct it87_data *data = dev_get_drvdata(dev); 861 long val; 862 u8 reg; 863 864 /* This check can go away if we ever support automatic fan speed 865 control on newer chips. */ 866 if (!has_old_autopwm(data)) { 867 dev_notice(dev, "Mapping change disabled for safety reasons\n"); 868 return -EINVAL; 869 } 870 871 if (strict_strtol(buf, 10, &val) < 0) 872 return -EINVAL; 873 874 switch (val) { 875 case (1 << 0): 876 reg = 0x00; 877 break; 878 case (1 << 1): 879 reg = 0x01; 880 break; 881 case (1 << 2): 882 reg = 0x02; 883 break; 884 default: 885 return -EINVAL; 886 } 887 888 mutex_lock(&data->update_lock); 889 data->pwm_temp_map[nr] = reg; 890 /* If we are in automatic mode, write the temp mapping immediately; 891 * otherwise, just store it for later use. */ 892 if (data->pwm_ctrl[nr] & 0x80) { 893 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 894 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 895 } 896 mutex_unlock(&data->update_lock); 897 return count; 898 } 899 900 static ssize_t show_auto_pwm(struct device *dev, 901 struct device_attribute *attr, char *buf) 902 { 903 struct it87_data *data = it87_update_device(dev); 904 struct sensor_device_attribute_2 *sensor_attr = 905 to_sensor_dev_attr_2(attr); 906 int nr = sensor_attr->nr; 907 int point = sensor_attr->index; 908 909 return sprintf(buf, "%d\n", PWM_FROM_REG(data->auto_pwm[nr][point])); 910 } 911 912 static ssize_t set_auto_pwm(struct device *dev, 913 struct device_attribute *attr, const char *buf, size_t count) 914 { 915 struct it87_data *data = dev_get_drvdata(dev); 916 struct sensor_device_attribute_2 *sensor_attr = 917 to_sensor_dev_attr_2(attr); 918 int nr = sensor_attr->nr; 919 int point = sensor_attr->index; 920 long val; 921 922 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255) 923 return -EINVAL; 924 925 mutex_lock(&data->update_lock); 926 data->auto_pwm[nr][point] = PWM_TO_REG(val); 927 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point), 928 data->auto_pwm[nr][point]); 929 mutex_unlock(&data->update_lock); 930 return count; 931 } 932 933 static ssize_t show_auto_temp(struct device *dev, 934 struct device_attribute *attr, char *buf) 935 { 936 struct it87_data *data = it87_update_device(dev); 937 struct sensor_device_attribute_2 *sensor_attr = 938 to_sensor_dev_attr_2(attr); 939 int nr = sensor_attr->nr; 940 int point = sensor_attr->index; 941 942 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point])); 943 } 944 945 static ssize_t set_auto_temp(struct device *dev, 946 struct device_attribute *attr, const char *buf, size_t count) 947 { 948 struct it87_data *data = dev_get_drvdata(dev); 949 struct sensor_device_attribute_2 *sensor_attr = 950 to_sensor_dev_attr_2(attr); 951 int nr = sensor_attr->nr; 952 int point = sensor_attr->index; 953 long val; 954 955 if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000) 956 return -EINVAL; 957 958 mutex_lock(&data->update_lock); 959 data->auto_temp[nr][point] = TEMP_TO_REG(val); 960 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point), 961 data->auto_temp[nr][point]); 962 mutex_unlock(&data->update_lock); 963 return count; 964 } 965 966 #define show_fan_offset(offset) \ 967 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 968 show_fan, NULL, offset - 1); \ 969 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 970 show_fan_min, set_fan_min, offset - 1); \ 971 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 972 show_fan_div, set_fan_div, offset - 1); 973 974 show_fan_offset(1); 975 show_fan_offset(2); 976 show_fan_offset(3); 977 978 #define show_pwm_offset(offset) \ 979 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 980 show_pwm_enable, set_pwm_enable, offset - 1); \ 981 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 982 show_pwm, set_pwm, offset - 1); \ 983 static DEVICE_ATTR(pwm##offset##_freq, \ 984 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \ 985 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \ 986 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \ 987 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \ 988 offset - 1); \ 989 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \ 990 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 991 offset - 1, 0); \ 992 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \ 993 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 994 offset - 1, 1); \ 995 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \ 996 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 997 offset - 1, 2); \ 998 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \ 999 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \ 1000 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \ 1001 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1002 offset - 1, 1); \ 1003 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \ 1004 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1005 offset - 1, 0); \ 1006 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \ 1007 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1008 offset - 1, 2); \ 1009 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \ 1010 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1011 offset - 1, 3); \ 1012 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \ 1013 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1014 offset - 1, 4); 1015 1016 show_pwm_offset(1); 1017 show_pwm_offset(2); 1018 show_pwm_offset(3); 1019 1020 /* A different set of callbacks for 16-bit fans */ 1021 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr, 1022 char *buf) 1023 { 1024 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1025 int nr = sensor_attr->index; 1026 struct it87_data *data = it87_update_device(dev); 1027 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr])); 1028 } 1029 1030 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr, 1031 char *buf) 1032 { 1033 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1034 int nr = sensor_attr->index; 1035 struct it87_data *data = it87_update_device(dev); 1036 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr])); 1037 } 1038 1039 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr, 1040 const char *buf, size_t count) 1041 { 1042 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1043 int nr = sensor_attr->index; 1044 struct it87_data *data = dev_get_drvdata(dev); 1045 long val; 1046 1047 if (strict_strtol(buf, 10, &val) < 0) 1048 return -EINVAL; 1049 1050 mutex_lock(&data->update_lock); 1051 data->fan_min[nr] = FAN16_TO_REG(val); 1052 it87_write_value(data, IT87_REG_FAN_MIN[nr], 1053 data->fan_min[nr] & 0xff); 1054 it87_write_value(data, IT87_REG_FANX_MIN[nr], 1055 data->fan_min[nr] >> 8); 1056 mutex_unlock(&data->update_lock); 1057 return count; 1058 } 1059 1060 /* We want to use the same sysfs file names as 8-bit fans, but we need 1061 different variable names, so we have to use SENSOR_ATTR instead of 1062 SENSOR_DEVICE_ATTR. */ 1063 #define show_fan16_offset(offset) \ 1064 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \ 1065 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \ 1066 show_fan16, NULL, offset - 1); \ 1067 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \ 1068 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 1069 show_fan16_min, set_fan16_min, offset - 1) 1070 1071 show_fan16_offset(1); 1072 show_fan16_offset(2); 1073 show_fan16_offset(3); 1074 show_fan16_offset(4); 1075 show_fan16_offset(5); 1076 1077 /* Alarms */ 1078 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 1079 char *buf) 1080 { 1081 struct it87_data *data = it87_update_device(dev); 1082 return sprintf(buf, "%u\n", data->alarms); 1083 } 1084 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 1085 1086 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 1087 char *buf) 1088 { 1089 int bitnr = to_sensor_dev_attr(attr)->index; 1090 struct it87_data *data = it87_update_device(dev); 1091 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 1092 } 1093 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8); 1094 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9); 1095 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10); 1096 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11); 1097 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12); 1098 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13); 1099 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14); 1100 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15); 1101 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0); 1102 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1); 1103 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2); 1104 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3); 1105 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6); 1106 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16); 1107 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17); 1108 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18); 1109 1110 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 1111 char *buf) 1112 { 1113 int bitnr = to_sensor_dev_attr(attr)->index; 1114 struct it87_data *data = it87_update_device(dev); 1115 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1); 1116 } 1117 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 1118 const char *buf, size_t count) 1119 { 1120 int bitnr = to_sensor_dev_attr(attr)->index; 1121 struct it87_data *data = dev_get_drvdata(dev); 1122 long val; 1123 1124 if (strict_strtol(buf, 10, &val) < 0 1125 || (val != 0 && val != 1)) 1126 return -EINVAL; 1127 1128 mutex_lock(&data->update_lock); 1129 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE); 1130 if (val) 1131 data->beeps |= (1 << bitnr); 1132 else 1133 data->beeps &= ~(1 << bitnr); 1134 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps); 1135 mutex_unlock(&data->update_lock); 1136 return count; 1137 } 1138 1139 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, 1140 show_beep, set_beep, 1); 1141 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1); 1142 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1); 1143 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1); 1144 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1); 1145 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1); 1146 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1); 1147 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1); 1148 /* fanX_beep writability is set later */ 1149 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0); 1150 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0); 1151 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0); 1152 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0); 1153 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0); 1154 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, 1155 show_beep, set_beep, 2); 1156 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2); 1157 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2); 1158 1159 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr, 1160 char *buf) 1161 { 1162 struct it87_data *data = dev_get_drvdata(dev); 1163 return sprintf(buf, "%u\n", data->vrm); 1164 } 1165 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr, 1166 const char *buf, size_t count) 1167 { 1168 struct it87_data *data = dev_get_drvdata(dev); 1169 unsigned long val; 1170 1171 if (strict_strtoul(buf, 10, &val) < 0) 1172 return -EINVAL; 1173 1174 data->vrm = val; 1175 1176 return count; 1177 } 1178 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 1179 1180 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr, 1181 char *buf) 1182 { 1183 struct it87_data *data = it87_update_device(dev); 1184 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 1185 } 1186 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 1187 1188 static ssize_t show_name(struct device *dev, struct device_attribute 1189 *devattr, char *buf) 1190 { 1191 struct it87_data *data = dev_get_drvdata(dev); 1192 return sprintf(buf, "%s\n", data->name); 1193 } 1194 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 1195 1196 static struct attribute *it87_attributes[] = { 1197 &sensor_dev_attr_in0_input.dev_attr.attr, 1198 &sensor_dev_attr_in1_input.dev_attr.attr, 1199 &sensor_dev_attr_in2_input.dev_attr.attr, 1200 &sensor_dev_attr_in3_input.dev_attr.attr, 1201 &sensor_dev_attr_in4_input.dev_attr.attr, 1202 &sensor_dev_attr_in5_input.dev_attr.attr, 1203 &sensor_dev_attr_in6_input.dev_attr.attr, 1204 &sensor_dev_attr_in7_input.dev_attr.attr, 1205 &sensor_dev_attr_in8_input.dev_attr.attr, 1206 &sensor_dev_attr_in0_min.dev_attr.attr, 1207 &sensor_dev_attr_in1_min.dev_attr.attr, 1208 &sensor_dev_attr_in2_min.dev_attr.attr, 1209 &sensor_dev_attr_in3_min.dev_attr.attr, 1210 &sensor_dev_attr_in4_min.dev_attr.attr, 1211 &sensor_dev_attr_in5_min.dev_attr.attr, 1212 &sensor_dev_attr_in6_min.dev_attr.attr, 1213 &sensor_dev_attr_in7_min.dev_attr.attr, 1214 &sensor_dev_attr_in0_max.dev_attr.attr, 1215 &sensor_dev_attr_in1_max.dev_attr.attr, 1216 &sensor_dev_attr_in2_max.dev_attr.attr, 1217 &sensor_dev_attr_in3_max.dev_attr.attr, 1218 &sensor_dev_attr_in4_max.dev_attr.attr, 1219 &sensor_dev_attr_in5_max.dev_attr.attr, 1220 &sensor_dev_attr_in6_max.dev_attr.attr, 1221 &sensor_dev_attr_in7_max.dev_attr.attr, 1222 &sensor_dev_attr_in0_alarm.dev_attr.attr, 1223 &sensor_dev_attr_in1_alarm.dev_attr.attr, 1224 &sensor_dev_attr_in2_alarm.dev_attr.attr, 1225 &sensor_dev_attr_in3_alarm.dev_attr.attr, 1226 &sensor_dev_attr_in4_alarm.dev_attr.attr, 1227 &sensor_dev_attr_in5_alarm.dev_attr.attr, 1228 &sensor_dev_attr_in6_alarm.dev_attr.attr, 1229 &sensor_dev_attr_in7_alarm.dev_attr.attr, 1230 1231 &sensor_dev_attr_temp1_input.dev_attr.attr, 1232 &sensor_dev_attr_temp2_input.dev_attr.attr, 1233 &sensor_dev_attr_temp3_input.dev_attr.attr, 1234 &sensor_dev_attr_temp1_max.dev_attr.attr, 1235 &sensor_dev_attr_temp2_max.dev_attr.attr, 1236 &sensor_dev_attr_temp3_max.dev_attr.attr, 1237 &sensor_dev_attr_temp1_min.dev_attr.attr, 1238 &sensor_dev_attr_temp2_min.dev_attr.attr, 1239 &sensor_dev_attr_temp3_min.dev_attr.attr, 1240 &sensor_dev_attr_temp1_type.dev_attr.attr, 1241 &sensor_dev_attr_temp2_type.dev_attr.attr, 1242 &sensor_dev_attr_temp3_type.dev_attr.attr, 1243 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1244 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1245 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1246 1247 &dev_attr_alarms.attr, 1248 &dev_attr_name.attr, 1249 NULL 1250 }; 1251 1252 static const struct attribute_group it87_group = { 1253 .attrs = it87_attributes, 1254 }; 1255 1256 static struct attribute *it87_attributes_beep[] = { 1257 &sensor_dev_attr_in0_beep.dev_attr.attr, 1258 &sensor_dev_attr_in1_beep.dev_attr.attr, 1259 &sensor_dev_attr_in2_beep.dev_attr.attr, 1260 &sensor_dev_attr_in3_beep.dev_attr.attr, 1261 &sensor_dev_attr_in4_beep.dev_attr.attr, 1262 &sensor_dev_attr_in5_beep.dev_attr.attr, 1263 &sensor_dev_attr_in6_beep.dev_attr.attr, 1264 &sensor_dev_attr_in7_beep.dev_attr.attr, 1265 1266 &sensor_dev_attr_temp1_beep.dev_attr.attr, 1267 &sensor_dev_attr_temp2_beep.dev_attr.attr, 1268 &sensor_dev_attr_temp3_beep.dev_attr.attr, 1269 NULL 1270 }; 1271 1272 static const struct attribute_group it87_group_beep = { 1273 .attrs = it87_attributes_beep, 1274 }; 1275 1276 static struct attribute *it87_attributes_fan16[5][3+1] = { { 1277 &sensor_dev_attr_fan1_input16.dev_attr.attr, 1278 &sensor_dev_attr_fan1_min16.dev_attr.attr, 1279 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1280 NULL 1281 }, { 1282 &sensor_dev_attr_fan2_input16.dev_attr.attr, 1283 &sensor_dev_attr_fan2_min16.dev_attr.attr, 1284 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1285 NULL 1286 }, { 1287 &sensor_dev_attr_fan3_input16.dev_attr.attr, 1288 &sensor_dev_attr_fan3_min16.dev_attr.attr, 1289 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1290 NULL 1291 }, { 1292 &sensor_dev_attr_fan4_input16.dev_attr.attr, 1293 &sensor_dev_attr_fan4_min16.dev_attr.attr, 1294 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1295 NULL 1296 }, { 1297 &sensor_dev_attr_fan5_input16.dev_attr.attr, 1298 &sensor_dev_attr_fan5_min16.dev_attr.attr, 1299 &sensor_dev_attr_fan5_alarm.dev_attr.attr, 1300 NULL 1301 } }; 1302 1303 static const struct attribute_group it87_group_fan16[5] = { 1304 { .attrs = it87_attributes_fan16[0] }, 1305 { .attrs = it87_attributes_fan16[1] }, 1306 { .attrs = it87_attributes_fan16[2] }, 1307 { .attrs = it87_attributes_fan16[3] }, 1308 { .attrs = it87_attributes_fan16[4] }, 1309 }; 1310 1311 static struct attribute *it87_attributes_fan[3][4+1] = { { 1312 &sensor_dev_attr_fan1_input.dev_attr.attr, 1313 &sensor_dev_attr_fan1_min.dev_attr.attr, 1314 &sensor_dev_attr_fan1_div.dev_attr.attr, 1315 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1316 NULL 1317 }, { 1318 &sensor_dev_attr_fan2_input.dev_attr.attr, 1319 &sensor_dev_attr_fan2_min.dev_attr.attr, 1320 &sensor_dev_attr_fan2_div.dev_attr.attr, 1321 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1322 NULL 1323 }, { 1324 &sensor_dev_attr_fan3_input.dev_attr.attr, 1325 &sensor_dev_attr_fan3_min.dev_attr.attr, 1326 &sensor_dev_attr_fan3_div.dev_attr.attr, 1327 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1328 NULL 1329 } }; 1330 1331 static const struct attribute_group it87_group_fan[3] = { 1332 { .attrs = it87_attributes_fan[0] }, 1333 { .attrs = it87_attributes_fan[1] }, 1334 { .attrs = it87_attributes_fan[2] }, 1335 }; 1336 1337 static const struct attribute_group * 1338 it87_get_fan_group(const struct it87_data *data) 1339 { 1340 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan; 1341 } 1342 1343 static struct attribute *it87_attributes_pwm[3][4+1] = { { 1344 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1345 &sensor_dev_attr_pwm1.dev_attr.attr, 1346 &dev_attr_pwm1_freq.attr, 1347 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, 1348 NULL 1349 }, { 1350 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1351 &sensor_dev_attr_pwm2.dev_attr.attr, 1352 &dev_attr_pwm2_freq.attr, 1353 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr, 1354 NULL 1355 }, { 1356 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1357 &sensor_dev_attr_pwm3.dev_attr.attr, 1358 &dev_attr_pwm3_freq.attr, 1359 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, 1360 NULL 1361 } }; 1362 1363 static const struct attribute_group it87_group_pwm[3] = { 1364 { .attrs = it87_attributes_pwm[0] }, 1365 { .attrs = it87_attributes_pwm[1] }, 1366 { .attrs = it87_attributes_pwm[2] }, 1367 }; 1368 1369 static struct attribute *it87_attributes_autopwm[3][9+1] = { { 1370 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1371 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1372 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 1373 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 1374 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 1375 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 1376 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 1377 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 1378 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 1379 NULL 1380 }, { 1381 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, 1382 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, 1383 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr, 1384 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr, 1385 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr, 1386 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr, 1387 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr, 1388 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr, 1389 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr, 1390 NULL 1391 }, { 1392 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, 1393 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, 1394 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr, 1395 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr, 1396 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr, 1397 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr, 1398 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr, 1399 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr, 1400 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr, 1401 NULL 1402 } }; 1403 1404 static const struct attribute_group it87_group_autopwm[3] = { 1405 { .attrs = it87_attributes_autopwm[0] }, 1406 { .attrs = it87_attributes_autopwm[1] }, 1407 { .attrs = it87_attributes_autopwm[2] }, 1408 }; 1409 1410 static struct attribute *it87_attributes_fan_beep[] = { 1411 &sensor_dev_attr_fan1_beep.dev_attr.attr, 1412 &sensor_dev_attr_fan2_beep.dev_attr.attr, 1413 &sensor_dev_attr_fan3_beep.dev_attr.attr, 1414 &sensor_dev_attr_fan4_beep.dev_attr.attr, 1415 &sensor_dev_attr_fan5_beep.dev_attr.attr, 1416 }; 1417 1418 static struct attribute *it87_attributes_vid[] = { 1419 &dev_attr_vrm.attr, 1420 &dev_attr_cpu0_vid.attr, 1421 NULL 1422 }; 1423 1424 static const struct attribute_group it87_group_vid = { 1425 .attrs = it87_attributes_vid, 1426 }; 1427 1428 /* SuperIO detection - will change isa_address if a chip is found */ 1429 static int __init it87_find(unsigned short *address, 1430 struct it87_sio_data *sio_data) 1431 { 1432 int err = -ENODEV; 1433 u16 chip_type; 1434 const char *board_vendor, *board_name; 1435 1436 superio_enter(); 1437 chip_type = force_id ? force_id : superio_inw(DEVID); 1438 1439 switch (chip_type) { 1440 case IT8705F_DEVID: 1441 sio_data->type = it87; 1442 break; 1443 case IT8712F_DEVID: 1444 sio_data->type = it8712; 1445 break; 1446 case IT8716F_DEVID: 1447 case IT8726F_DEVID: 1448 sio_data->type = it8716; 1449 break; 1450 case IT8718F_DEVID: 1451 sio_data->type = it8718; 1452 break; 1453 case IT8720F_DEVID: 1454 sio_data->type = it8720; 1455 break; 1456 case 0xffff: /* No device at all */ 1457 goto exit; 1458 default: 1459 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n", 1460 chip_type); 1461 goto exit; 1462 } 1463 1464 superio_select(PME); 1465 if (!(superio_inb(IT87_ACT_REG) & 0x01)) { 1466 pr_info("it87: Device not activated, skipping\n"); 1467 goto exit; 1468 } 1469 1470 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); 1471 if (*address == 0) { 1472 pr_info("it87: Base address not set, skipping\n"); 1473 goto exit; 1474 } 1475 1476 err = 0; 1477 sio_data->revision = superio_inb(DEVREV) & 0x0f; 1478 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n", 1479 chip_type, *address, sio_data->revision); 1480 1481 /* Read GPIO config and VID value from LDN 7 (GPIO) */ 1482 if (sio_data->type == it87) { 1483 /* The IT8705F doesn't have VID pins at all */ 1484 sio_data->skip_vid = 1; 1485 1486 /* The IT8705F has a different LD number for GPIO */ 1487 superio_select(5); 1488 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1489 } else { 1490 int reg; 1491 1492 superio_select(GPIO); 1493 /* We need at least 4 VID pins */ 1494 reg = superio_inb(IT87_SIO_GPIO3_REG); 1495 if (reg & 0x0f) { 1496 pr_info("it87: VID is disabled (pins used for GPIO)\n"); 1497 sio_data->skip_vid = 1; 1498 } 1499 1500 /* Check if fan3 is there or not */ 1501 if (reg & (1 << 6)) 1502 sio_data->skip_pwm |= (1 << 2); 1503 if (reg & (1 << 7)) 1504 sio_data->skip_fan |= (1 << 2); 1505 1506 /* Check if fan2 is there or not */ 1507 reg = superio_inb(IT87_SIO_GPIO5_REG); 1508 if (reg & (1 << 1)) 1509 sio_data->skip_pwm |= (1 << 1); 1510 if (reg & (1 << 2)) 1511 sio_data->skip_fan |= (1 << 1); 1512 1513 if ((sio_data->type == it8718 || sio_data->type == it8720) 1514 && !(sio_data->skip_vid)) 1515 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG); 1516 1517 reg = superio_inb(IT87_SIO_PINX2_REG); 1518 if (reg & (1 << 0)) 1519 pr_info("it87: in3 is VCC (+5V)\n"); 1520 if (reg & (1 << 1)) 1521 pr_info("it87: in7 is VCCH (+5V Stand-By)\n"); 1522 1523 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1524 } 1525 if (sio_data->beep_pin) 1526 pr_info("it87: Beeping is supported\n"); 1527 1528 /* Disable specific features based on DMI strings */ 1529 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR); 1530 board_name = dmi_get_system_info(DMI_BOARD_NAME); 1531 if (board_vendor && board_name) { 1532 if (strcmp(board_vendor, "nVIDIA") == 0 1533 && strcmp(board_name, "FN68PT") == 0) { 1534 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not 1535 connected to a fan, but to something else. One user 1536 has reported instant system power-off when changing 1537 the PWM2 duty cycle, so we disable it. 1538 I use the board name string as the trigger in case 1539 the same board is ever used in other systems. */ 1540 pr_info("it87: Disabling pwm2 due to " 1541 "hardware constraints\n"); 1542 sio_data->skip_pwm = (1 << 1); 1543 } 1544 } 1545 1546 exit: 1547 superio_exit(); 1548 return err; 1549 } 1550 1551 static void it87_remove_files(struct device *dev) 1552 { 1553 struct it87_data *data = platform_get_drvdata(pdev); 1554 struct it87_sio_data *sio_data = dev->platform_data; 1555 const struct attribute_group *fan_group = it87_get_fan_group(data); 1556 int i; 1557 1558 sysfs_remove_group(&dev->kobj, &it87_group); 1559 if (sio_data->beep_pin) 1560 sysfs_remove_group(&dev->kobj, &it87_group_beep); 1561 for (i = 0; i < 5; i++) { 1562 if (!(data->has_fan & (1 << i))) 1563 continue; 1564 sysfs_remove_group(&dev->kobj, &fan_group[i]); 1565 if (sio_data->beep_pin) 1566 sysfs_remove_file(&dev->kobj, 1567 it87_attributes_fan_beep[i]); 1568 } 1569 for (i = 0; i < 3; i++) { 1570 if (sio_data->skip_pwm & (1 << 0)) 1571 continue; 1572 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]); 1573 if (has_old_autopwm(data)) 1574 sysfs_remove_group(&dev->kobj, 1575 &it87_group_autopwm[i]); 1576 } 1577 if (!sio_data->skip_vid) 1578 sysfs_remove_group(&dev->kobj, &it87_group_vid); 1579 } 1580 1581 static int __devinit it87_probe(struct platform_device *pdev) 1582 { 1583 struct it87_data *data; 1584 struct resource *res; 1585 struct device *dev = &pdev->dev; 1586 struct it87_sio_data *sio_data = dev->platform_data; 1587 const struct attribute_group *fan_group; 1588 int err = 0, i; 1589 int enable_pwm_interface; 1590 int fan_beep_need_rw; 1591 static const char *names[] = { 1592 "it87", 1593 "it8712", 1594 "it8716", 1595 "it8718", 1596 "it8720", 1597 }; 1598 1599 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1600 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) { 1601 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", 1602 (unsigned long)res->start, 1603 (unsigned long)(res->start + IT87_EC_EXTENT - 1)); 1604 err = -EBUSY; 1605 goto ERROR0; 1606 } 1607 1608 data = kzalloc(sizeof(struct it87_data), GFP_KERNEL); 1609 if (!data) { 1610 err = -ENOMEM; 1611 goto ERROR1; 1612 } 1613 1614 data->addr = res->start; 1615 data->type = sio_data->type; 1616 data->revision = sio_data->revision; 1617 data->name = names[sio_data->type]; 1618 1619 /* Now, we do the remaining detection. */ 1620 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80) 1621 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) { 1622 err = -ENODEV; 1623 goto ERROR2; 1624 } 1625 1626 platform_set_drvdata(pdev, data); 1627 1628 mutex_init(&data->update_lock); 1629 1630 /* Check PWM configuration */ 1631 enable_pwm_interface = it87_check_pwm(dev); 1632 1633 /* Initialize the IT87 chip */ 1634 it87_init_device(pdev); 1635 1636 /* Register sysfs hooks */ 1637 err = sysfs_create_group(&dev->kobj, &it87_group); 1638 if (err) 1639 goto ERROR2; 1640 1641 if (sio_data->beep_pin) { 1642 err = sysfs_create_group(&dev->kobj, &it87_group_beep); 1643 if (err) 1644 goto ERROR4; 1645 } 1646 1647 /* Do not create fan files for disabled fans */ 1648 fan_group = it87_get_fan_group(data); 1649 fan_beep_need_rw = 1; 1650 for (i = 0; i < 5; i++) { 1651 if (!(data->has_fan & (1 << i))) 1652 continue; 1653 err = sysfs_create_group(&dev->kobj, &fan_group[i]); 1654 if (err) 1655 goto ERROR4; 1656 1657 if (sio_data->beep_pin) { 1658 err = sysfs_create_file(&dev->kobj, 1659 it87_attributes_fan_beep[i]); 1660 if (err) 1661 goto ERROR4; 1662 if (!fan_beep_need_rw) 1663 continue; 1664 1665 /* As we have a single beep enable bit for all fans, 1666 * only the first enabled fan has a writable attribute 1667 * for it. */ 1668 if (sysfs_chmod_file(&dev->kobj, 1669 it87_attributes_fan_beep[i], 1670 S_IRUGO | S_IWUSR)) 1671 dev_dbg(dev, "chmod +w fan%d_beep failed\n", 1672 i + 1); 1673 fan_beep_need_rw = 0; 1674 } 1675 } 1676 1677 if (enable_pwm_interface) { 1678 for (i = 0; i < 3; i++) { 1679 if (sio_data->skip_pwm & (1 << i)) 1680 continue; 1681 err = sysfs_create_group(&dev->kobj, 1682 &it87_group_pwm[i]); 1683 if (err) 1684 goto ERROR4; 1685 1686 if (!has_old_autopwm(data)) 1687 continue; 1688 err = sysfs_create_group(&dev->kobj, 1689 &it87_group_autopwm[i]); 1690 if (err) 1691 goto ERROR4; 1692 } 1693 } 1694 1695 if (!sio_data->skip_vid) { 1696 data->vrm = vid_which_vrm(); 1697 /* VID reading from Super-I/O config space if available */ 1698 data->vid = sio_data->vid_value; 1699 err = sysfs_create_group(&dev->kobj, &it87_group_vid); 1700 if (err) 1701 goto ERROR4; 1702 } 1703 1704 data->hwmon_dev = hwmon_device_register(dev); 1705 if (IS_ERR(data->hwmon_dev)) { 1706 err = PTR_ERR(data->hwmon_dev); 1707 goto ERROR4; 1708 } 1709 1710 return 0; 1711 1712 ERROR4: 1713 it87_remove_files(dev); 1714 ERROR2: 1715 platform_set_drvdata(pdev, NULL); 1716 kfree(data); 1717 ERROR1: 1718 release_region(res->start, IT87_EC_EXTENT); 1719 ERROR0: 1720 return err; 1721 } 1722 1723 static int __devexit it87_remove(struct platform_device *pdev) 1724 { 1725 struct it87_data *data = platform_get_drvdata(pdev); 1726 1727 hwmon_device_unregister(data->hwmon_dev); 1728 it87_remove_files(&pdev->dev); 1729 1730 release_region(data->addr, IT87_EC_EXTENT); 1731 platform_set_drvdata(pdev, NULL); 1732 kfree(data); 1733 1734 return 0; 1735 } 1736 1737 /* Must be called with data->update_lock held, except during initialization. 1738 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1739 would slow down the IT87 access and should not be necessary. */ 1740 static int it87_read_value(struct it87_data *data, u8 reg) 1741 { 1742 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1743 return inb_p(data->addr + IT87_DATA_REG_OFFSET); 1744 } 1745 1746 /* Must be called with data->update_lock held, except during initialization. 1747 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1748 would slow down the IT87 access and should not be necessary. */ 1749 static void it87_write_value(struct it87_data *data, u8 reg, u8 value) 1750 { 1751 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1752 outb_p(value, data->addr + IT87_DATA_REG_OFFSET); 1753 } 1754 1755 /* Return 1 if and only if the PWM interface is safe to use */ 1756 static int __devinit it87_check_pwm(struct device *dev) 1757 { 1758 struct it87_data *data = dev_get_drvdata(dev); 1759 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off 1760 * and polarity set to active low is sign that this is the case so we 1761 * disable pwm control to protect the user. */ 1762 int tmp = it87_read_value(data, IT87_REG_FAN_CTL); 1763 if ((tmp & 0x87) == 0) { 1764 if (fix_pwm_polarity) { 1765 /* The user asks us to attempt a chip reconfiguration. 1766 * This means switching to active high polarity and 1767 * inverting all fan speed values. */ 1768 int i; 1769 u8 pwm[3]; 1770 1771 for (i = 0; i < 3; i++) 1772 pwm[i] = it87_read_value(data, 1773 IT87_REG_PWM(i)); 1774 1775 /* If any fan is in automatic pwm mode, the polarity 1776 * might be correct, as suspicious as it seems, so we 1777 * better don't change anything (but still disable the 1778 * PWM interface). */ 1779 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) { 1780 dev_info(dev, "Reconfiguring PWM to " 1781 "active high polarity\n"); 1782 it87_write_value(data, IT87_REG_FAN_CTL, 1783 tmp | 0x87); 1784 for (i = 0; i < 3; i++) 1785 it87_write_value(data, 1786 IT87_REG_PWM(i), 1787 0x7f & ~pwm[i]); 1788 return 1; 1789 } 1790 1791 dev_info(dev, "PWM configuration is " 1792 "too broken to be fixed\n"); 1793 } 1794 1795 dev_info(dev, "Detected broken BIOS " 1796 "defaults, disabling PWM interface\n"); 1797 return 0; 1798 } else if (fix_pwm_polarity) { 1799 dev_info(dev, "PWM configuration looks " 1800 "sane, won't touch\n"); 1801 } 1802 1803 return 1; 1804 } 1805 1806 /* Called when we have found a new IT87. */ 1807 static void __devinit it87_init_device(struct platform_device *pdev) 1808 { 1809 struct it87_sio_data *sio_data = pdev->dev.platform_data; 1810 struct it87_data *data = platform_get_drvdata(pdev); 1811 int tmp, i; 1812 u8 mask; 1813 1814 /* For each PWM channel: 1815 * - If it is in automatic mode, setting to manual mode should set 1816 * the fan to full speed by default. 1817 * - If it is in manual mode, we need a mapping to temperature 1818 * channels to use when later setting to automatic mode later. 1819 * Use a 1:1 mapping by default (we are clueless.) 1820 * In both cases, the value can (and should) be changed by the user 1821 * prior to switching to a different mode. */ 1822 for (i = 0; i < 3; i++) { 1823 data->pwm_temp_map[i] = i; 1824 data->pwm_duty[i] = 0x7f; /* Full speed */ 1825 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */ 1826 } 1827 1828 /* Some chips seem to have default value 0xff for all limit 1829 * registers. For low voltage limits it makes no sense and triggers 1830 * alarms, so change to 0 instead. For high temperature limits, it 1831 * means -1 degree C, which surprisingly doesn't trigger an alarm, 1832 * but is still confusing, so change to 127 degrees C. */ 1833 for (i = 0; i < 8; i++) { 1834 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i)); 1835 if (tmp == 0xff) 1836 it87_write_value(data, IT87_REG_VIN_MIN(i), 0); 1837 } 1838 for (i = 0; i < 3; i++) { 1839 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1840 if (tmp == 0xff) 1841 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127); 1842 } 1843 1844 /* Check if temperature channels are reset manually or by some reason */ 1845 tmp = it87_read_value(data, IT87_REG_TEMP_ENABLE); 1846 if ((tmp & 0x3f) == 0) { 1847 /* Temp1,Temp3=thermistor; Temp2=thermal diode */ 1848 tmp = (tmp & 0xc0) | 0x2a; 1849 it87_write_value(data, IT87_REG_TEMP_ENABLE, tmp); 1850 } 1851 data->sensor = tmp; 1852 1853 /* Check if voltage monitors are reset manually or by some reason */ 1854 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE); 1855 if ((tmp & 0xff) == 0) { 1856 /* Enable all voltage monitors */ 1857 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff); 1858 } 1859 1860 /* Check if tachometers are reset manually or by some reason */ 1861 mask = 0x70 & ~(sio_data->skip_fan << 4); 1862 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL); 1863 if ((data->fan_main_ctrl & mask) == 0) { 1864 /* Enable all fan tachometers */ 1865 data->fan_main_ctrl |= mask; 1866 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 1867 data->fan_main_ctrl); 1868 } 1869 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07; 1870 1871 /* Set tachometers to 16-bit mode if needed */ 1872 if (has_16bit_fans(data)) { 1873 tmp = it87_read_value(data, IT87_REG_FAN_16BIT); 1874 if (~tmp & 0x07 & data->has_fan) { 1875 dev_dbg(&pdev->dev, 1876 "Setting fan1-3 to 16-bit mode\n"); 1877 it87_write_value(data, IT87_REG_FAN_16BIT, 1878 tmp | 0x07); 1879 } 1880 /* IT8705F only supports three fans. */ 1881 if (data->type != it87) { 1882 if (tmp & (1 << 4)) 1883 data->has_fan |= (1 << 3); /* fan4 enabled */ 1884 if (tmp & (1 << 5)) 1885 data->has_fan |= (1 << 4); /* fan5 enabled */ 1886 } 1887 } 1888 1889 /* Fan input pins may be used for alternative functions */ 1890 data->has_fan &= ~sio_data->skip_fan; 1891 1892 /* Start monitoring */ 1893 it87_write_value(data, IT87_REG_CONFIG, 1894 (it87_read_value(data, IT87_REG_CONFIG) & 0x36) 1895 | (update_vbat ? 0x41 : 0x01)); 1896 } 1897 1898 static void it87_update_pwm_ctrl(struct it87_data *data, int nr) 1899 { 1900 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr)); 1901 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */ 1902 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03; 1903 else /* Manual mode */ 1904 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f; 1905 1906 if (has_old_autopwm(data)) { 1907 int i; 1908 1909 for (i = 0; i < 5 ; i++) 1910 data->auto_temp[nr][i] = it87_read_value(data, 1911 IT87_REG_AUTO_TEMP(nr, i)); 1912 for (i = 0; i < 3 ; i++) 1913 data->auto_pwm[nr][i] = it87_read_value(data, 1914 IT87_REG_AUTO_PWM(nr, i)); 1915 } 1916 } 1917 1918 static struct it87_data *it87_update_device(struct device *dev) 1919 { 1920 struct it87_data *data = dev_get_drvdata(dev); 1921 int i; 1922 1923 mutex_lock(&data->update_lock); 1924 1925 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 1926 || !data->valid) { 1927 if (update_vbat) { 1928 /* Cleared after each update, so reenable. Value 1929 returned by this read will be previous value */ 1930 it87_write_value(data, IT87_REG_CONFIG, 1931 it87_read_value(data, IT87_REG_CONFIG) | 0x40); 1932 } 1933 for (i = 0; i <= 7; i++) { 1934 data->in[i] = 1935 it87_read_value(data, IT87_REG_VIN(i)); 1936 data->in_min[i] = 1937 it87_read_value(data, IT87_REG_VIN_MIN(i)); 1938 data->in_max[i] = 1939 it87_read_value(data, IT87_REG_VIN_MAX(i)); 1940 } 1941 /* in8 (battery) has no limit registers */ 1942 data->in[8] = it87_read_value(data, IT87_REG_VIN(8)); 1943 1944 for (i = 0; i < 5; i++) { 1945 /* Skip disabled fans */ 1946 if (!(data->has_fan & (1 << i))) 1947 continue; 1948 1949 data->fan_min[i] = 1950 it87_read_value(data, IT87_REG_FAN_MIN[i]); 1951 data->fan[i] = it87_read_value(data, 1952 IT87_REG_FAN[i]); 1953 /* Add high byte if in 16-bit mode */ 1954 if (has_16bit_fans(data)) { 1955 data->fan[i] |= it87_read_value(data, 1956 IT87_REG_FANX[i]) << 8; 1957 data->fan_min[i] |= it87_read_value(data, 1958 IT87_REG_FANX_MIN[i]) << 8; 1959 } 1960 } 1961 for (i = 0; i < 3; i++) { 1962 data->temp[i] = 1963 it87_read_value(data, IT87_REG_TEMP(i)); 1964 data->temp_high[i] = 1965 it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1966 data->temp_low[i] = 1967 it87_read_value(data, IT87_REG_TEMP_LOW(i)); 1968 } 1969 1970 /* Newer chips don't have clock dividers */ 1971 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) { 1972 i = it87_read_value(data, IT87_REG_FAN_DIV); 1973 data->fan_div[0] = i & 0x07; 1974 data->fan_div[1] = (i >> 3) & 0x07; 1975 data->fan_div[2] = (i & 0x40) ? 3 : 1; 1976 } 1977 1978 data->alarms = 1979 it87_read_value(data, IT87_REG_ALARM1) | 1980 (it87_read_value(data, IT87_REG_ALARM2) << 8) | 1981 (it87_read_value(data, IT87_REG_ALARM3) << 16); 1982 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE); 1983 1984 data->fan_main_ctrl = it87_read_value(data, 1985 IT87_REG_FAN_MAIN_CTRL); 1986 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL); 1987 for (i = 0; i < 3; i++) 1988 it87_update_pwm_ctrl(data, i); 1989 1990 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE); 1991 /* The 8705 does not have VID capability. 1992 The 8718 and the 8720 don't use IT87_REG_VID for the 1993 same purpose. */ 1994 if (data->type == it8712 || data->type == it8716) { 1995 data->vid = it87_read_value(data, IT87_REG_VID); 1996 /* The older IT8712F revisions had only 5 VID pins, 1997 but we assume it is always safe to read 6 bits. */ 1998 data->vid &= 0x3f; 1999 } 2000 data->last_updated = jiffies; 2001 data->valid = 1; 2002 } 2003 2004 mutex_unlock(&data->update_lock); 2005 2006 return data; 2007 } 2008 2009 static int __init it87_device_add(unsigned short address, 2010 const struct it87_sio_data *sio_data) 2011 { 2012 struct resource res = { 2013 .start = address + IT87_EC_OFFSET, 2014 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1, 2015 .name = DRVNAME, 2016 .flags = IORESOURCE_IO, 2017 }; 2018 int err; 2019 2020 err = acpi_check_resource_conflict(&res); 2021 if (err) 2022 goto exit; 2023 2024 pdev = platform_device_alloc(DRVNAME, address); 2025 if (!pdev) { 2026 err = -ENOMEM; 2027 printk(KERN_ERR DRVNAME ": Device allocation failed\n"); 2028 goto exit; 2029 } 2030 2031 err = platform_device_add_resources(pdev, &res, 1); 2032 if (err) { 2033 printk(KERN_ERR DRVNAME ": Device resource addition failed " 2034 "(%d)\n", err); 2035 goto exit_device_put; 2036 } 2037 2038 err = platform_device_add_data(pdev, sio_data, 2039 sizeof(struct it87_sio_data)); 2040 if (err) { 2041 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n"); 2042 goto exit_device_put; 2043 } 2044 2045 err = platform_device_add(pdev); 2046 if (err) { 2047 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", 2048 err); 2049 goto exit_device_put; 2050 } 2051 2052 return 0; 2053 2054 exit_device_put: 2055 platform_device_put(pdev); 2056 exit: 2057 return err; 2058 } 2059 2060 static int __init sm_it87_init(void) 2061 { 2062 int err; 2063 unsigned short isa_address = 0; 2064 struct it87_sio_data sio_data; 2065 2066 memset(&sio_data, 0, sizeof(struct it87_sio_data)); 2067 err = it87_find(&isa_address, &sio_data); 2068 if (err) 2069 return err; 2070 err = platform_driver_register(&it87_driver); 2071 if (err) 2072 return err; 2073 2074 err = it87_device_add(isa_address, &sio_data); 2075 if (err) { 2076 platform_driver_unregister(&it87_driver); 2077 return err; 2078 } 2079 2080 return 0; 2081 } 2082 2083 static void __exit sm_it87_exit(void) 2084 { 2085 platform_device_unregister(pdev); 2086 platform_driver_unregister(&it87_driver); 2087 } 2088 2089 2090 MODULE_AUTHOR("Chris Gauthron, " 2091 "Jean Delvare <khali@linux-fr.org>"); 2092 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8720F/8726F, SiS950 driver"); 2093 module_param(update_vbat, bool, 0); 2094 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); 2095 module_param(fix_pwm_polarity, bool, 0); 2096 MODULE_PARM_DESC(fix_pwm_polarity, 2097 "Force PWM polarity to active high (DANGEROUS)"); 2098 MODULE_LICENSE("GPL"); 2099 2100 module_init(sm_it87_init); 2101 module_exit(sm_it87_exit); 2102