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 #include <linux/module.h> 42 #include <linux/init.h> 43 #include <linux/slab.h> 44 #include <linux/jiffies.h> 45 #include <linux/platform_device.h> 46 #include <linux/hwmon.h> 47 #include <linux/hwmon-sysfs.h> 48 #include <linux/hwmon-vid.h> 49 #include <linux/err.h> 50 #include <linux/mutex.h> 51 #include <linux/sysfs.h> 52 #include <linux/string.h> 53 #include <linux/dmi.h> 54 #include <linux/acpi.h> 55 #include <linux/io.h> 56 57 #define DRVNAME "it87" 58 59 enum chips { it87, it8712, it8716, it8718, it8720, it8721 }; 60 61 static unsigned short force_id; 62 module_param(force_id, ushort, 0); 63 MODULE_PARM_DESC(force_id, "Override the detected device ID"); 64 65 static struct platform_device *pdev; 66 67 #define REG 0x2e /* The register to read/write */ 68 #define DEV 0x07 /* Register: Logical device select */ 69 #define VAL 0x2f /* The value to read/write */ 70 #define PME 0x04 /* The device with the fan registers in it */ 71 72 /* The device with the IT8718F/IT8720F VID value in it */ 73 #define GPIO 0x07 74 75 #define DEVID 0x20 /* Register: Device ID */ 76 #define DEVREV 0x22 /* Register: Device Revision */ 77 78 static inline int 79 superio_inb(int reg) 80 { 81 outb(reg, REG); 82 return inb(VAL); 83 } 84 85 static inline void 86 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 103 superio_select(int ldn) 104 { 105 outb(DEV, REG); 106 outb(ldn, VAL); 107 } 108 109 static inline void 110 superio_enter(void) 111 { 112 outb(0x87, REG); 113 outb(0x01, REG); 114 outb(0x55, REG); 115 outb(0x55, REG); 116 } 117 118 static inline void 119 superio_exit(void) 120 { 121 outb(0x02, REG); 122 outb(0x02, VAL); 123 } 124 125 /* Logical device 4 registers */ 126 #define IT8712F_DEVID 0x8712 127 #define IT8705F_DEVID 0x8705 128 #define IT8716F_DEVID 0x8716 129 #define IT8718F_DEVID 0x8718 130 #define IT8720F_DEVID 0x8720 131 #define IT8721F_DEVID 0x8721 132 #define IT8726F_DEVID 0x8726 133 #define IT87_ACT_REG 0x30 134 #define IT87_BASE_REG 0x60 135 136 /* Logical device 7 registers (IT8712F and later) */ 137 #define IT87_SIO_GPIO3_REG 0x27 138 #define IT87_SIO_GPIO5_REG 0x29 139 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */ 140 #define IT87_SIO_VID_REG 0xfc /* VID value */ 141 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */ 142 143 /* Update battery voltage after every reading if true */ 144 static int update_vbat; 145 146 /* Not all BIOSes properly configure the PWM registers */ 147 static int fix_pwm_polarity; 148 149 /* Many IT87 constants specified below */ 150 151 /* Length of ISA address segment */ 152 #define IT87_EXTENT 8 153 154 /* Length of ISA address segment for Environmental Controller */ 155 #define IT87_EC_EXTENT 2 156 157 /* Offset of EC registers from ISA base address */ 158 #define IT87_EC_OFFSET 5 159 160 /* Where are the ISA address/data registers relative to the EC base address */ 161 #define IT87_ADDR_REG_OFFSET 0 162 #define IT87_DATA_REG_OFFSET 1 163 164 /*----- The IT87 registers -----*/ 165 166 #define IT87_REG_CONFIG 0x00 167 168 #define IT87_REG_ALARM1 0x01 169 #define IT87_REG_ALARM2 0x02 170 #define IT87_REG_ALARM3 0x03 171 172 /* The IT8718F and IT8720F have the VID value in a different register, in 173 Super-I/O configuration space. */ 174 #define IT87_REG_VID 0x0a 175 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b 176 for fan divisors. Later IT8712F revisions must use 16-bit tachometer 177 mode. */ 178 #define IT87_REG_FAN_DIV 0x0b 179 #define IT87_REG_FAN_16BIT 0x0c 180 181 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */ 182 183 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 }; 184 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 }; 185 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 }; 186 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 }; 187 #define IT87_REG_FAN_MAIN_CTRL 0x13 188 #define IT87_REG_FAN_CTL 0x14 189 #define IT87_REG_PWM(nr) (0x15 + (nr)) 190 191 #define IT87_REG_VIN(nr) (0x20 + (nr)) 192 #define IT87_REG_TEMP(nr) (0x29 + (nr)) 193 194 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2) 195 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2) 196 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2) 197 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2) 198 199 #define IT87_REG_VIN_ENABLE 0x50 200 #define IT87_REG_TEMP_ENABLE 0x51 201 #define IT87_REG_BEEP_ENABLE 0x5c 202 203 #define IT87_REG_CHIPID 0x58 204 205 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i)) 206 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i)) 207 208 209 struct it87_sio_data { 210 enum chips type; 211 /* Values read from Super-I/O config space */ 212 u8 revision; 213 u8 vid_value; 214 u8 beep_pin; 215 u8 internal; /* Internal sensors can be labeled */ 216 /* Features skipped based on config or DMI */ 217 u8 skip_vid; 218 u8 skip_fan; 219 u8 skip_pwm; 220 }; 221 222 /* For each registered chip, we need to keep some data in memory. 223 The structure is dynamically allocated. */ 224 struct it87_data { 225 struct device *hwmon_dev; 226 enum chips type; 227 u8 revision; 228 229 unsigned short addr; 230 const char *name; 231 struct mutex update_lock; 232 char valid; /* !=0 if following fields are valid */ 233 unsigned long last_updated; /* In jiffies */ 234 235 u16 in_scaled; /* Internal voltage sensors are scaled */ 236 u8 in[9]; /* Register value */ 237 u8 in_max[8]; /* Register value */ 238 u8 in_min[8]; /* Register value */ 239 u8 has_fan; /* Bitfield, fans enabled */ 240 u16 fan[5]; /* Register values, possibly combined */ 241 u16 fan_min[5]; /* Register values, possibly combined */ 242 s8 temp[3]; /* Register value */ 243 s8 temp_high[3]; /* Register value */ 244 s8 temp_low[3]; /* Register value */ 245 u8 sensor; /* Register value */ 246 u8 fan_div[3]; /* Register encoding, shifted right */ 247 u8 vid; /* Register encoding, combined */ 248 u8 vrm; 249 u32 alarms; /* Register encoding, combined */ 250 u8 beeps; /* Register encoding */ 251 u8 fan_main_ctrl; /* Register value */ 252 u8 fan_ctl; /* Register value */ 253 254 /* The following 3 arrays correspond to the same registers. The 255 * meaning of bits 6-0 depends on the value of bit 7, and we want 256 * to preserve settings on mode changes, so we have to track all 257 * values separately. */ 258 u8 pwm_ctrl[3]; /* Register value */ 259 u8 pwm_duty[3]; /* Manual PWM value set by user (bit 6-0) */ 260 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */ 261 262 /* Automatic fan speed control registers */ 263 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */ 264 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */ 265 }; 266 267 static u8 in_to_reg(const struct it87_data *data, int nr, long val) 268 { 269 long lsb; 270 271 if (data->type == it8721) { 272 if (data->in_scaled & (1 << nr)) 273 lsb = 24; 274 else 275 lsb = 12; 276 } else 277 lsb = 16; 278 279 val = DIV_ROUND_CLOSEST(val, lsb); 280 return SENSORS_LIMIT(val, 0, 255); 281 } 282 283 static int in_from_reg(const struct it87_data *data, int nr, int val) 284 { 285 if (data->type == it8721) { 286 if (data->in_scaled & (1 << nr)) 287 return val * 24; 288 else 289 return val * 12; 290 } else 291 return val * 16; 292 } 293 294 static inline u8 FAN_TO_REG(long rpm, int div) 295 { 296 if (rpm == 0) 297 return 255; 298 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 299 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 300 254); 301 } 302 303 static inline u16 FAN16_TO_REG(long rpm) 304 { 305 if (rpm == 0) 306 return 0xffff; 307 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe); 308 } 309 310 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \ 311 1350000 / ((val) * (div))) 312 /* The divider is fixed to 2 in 16-bit mode */ 313 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \ 314 1350000 / ((val) * 2)) 315 316 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \ 317 ((val) + 500) / 1000), -128, 127)) 318 #define TEMP_FROM_REG(val) ((val) * 1000) 319 320 static u8 pwm_to_reg(const struct it87_data *data, long val) 321 { 322 if (data->type == it8721) 323 return val; 324 else 325 return val >> 1; 326 } 327 328 static int pwm_from_reg(const struct it87_data *data, u8 reg) 329 { 330 if (data->type == it8721) 331 return reg; 332 else 333 return (reg & 0x7f) << 1; 334 } 335 336 337 static int DIV_TO_REG(int val) 338 { 339 int answer = 0; 340 while (answer < 7 && (val >>= 1)) 341 answer++; 342 return answer; 343 } 344 #define DIV_FROM_REG(val) (1 << (val)) 345 346 static const unsigned int pwm_freq[8] = { 347 48000000 / 128, 348 24000000 / 128, 349 12000000 / 128, 350 8000000 / 128, 351 6000000 / 128, 352 3000000 / 128, 353 1500000 / 128, 354 750000 / 128, 355 }; 356 357 static inline int has_16bit_fans(const struct it87_data *data) 358 { 359 /* IT8705F Datasheet 0.4.1, 3h == Version G. 360 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J. 361 These are the first revisions with 16bit tachometer support. */ 362 return (data->type == it87 && data->revision >= 0x03) 363 || (data->type == it8712 && data->revision >= 0x08) 364 || data->type == it8716 365 || data->type == it8718 366 || data->type == it8720 367 || data->type == it8721; 368 } 369 370 static inline int has_old_autopwm(const struct it87_data *data) 371 { 372 /* The old automatic fan speed control interface is implemented 373 by IT8705F chips up to revision F and IT8712F chips up to 374 revision G. */ 375 return (data->type == it87 && data->revision < 0x03) 376 || (data->type == it8712 && data->revision < 0x08); 377 } 378 379 static int it87_probe(struct platform_device *pdev); 380 static int __devexit it87_remove(struct platform_device *pdev); 381 382 static int it87_read_value(struct it87_data *data, u8 reg); 383 static void it87_write_value(struct it87_data *data, u8 reg, u8 value); 384 static struct it87_data *it87_update_device(struct device *dev); 385 static int it87_check_pwm(struct device *dev); 386 static void it87_init_device(struct platform_device *pdev); 387 388 389 static struct platform_driver it87_driver = { 390 .driver = { 391 .owner = THIS_MODULE, 392 .name = DRVNAME, 393 }, 394 .probe = it87_probe, 395 .remove = __devexit_p(it87_remove), 396 }; 397 398 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 399 char *buf) 400 { 401 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 402 int nr = sensor_attr->index; 403 404 struct it87_data *data = it87_update_device(dev); 405 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr])); 406 } 407 408 static ssize_t show_in_min(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_min[nr])); 416 } 417 418 static ssize_t show_in_max(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_max[nr])); 426 } 427 428 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 429 const char *buf, size_t count) 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 = dev_get_drvdata(dev); 435 unsigned long val; 436 437 if (strict_strtoul(buf, 10, &val) < 0) 438 return -EINVAL; 439 440 mutex_lock(&data->update_lock); 441 data->in_min[nr] = in_to_reg(data, nr, val); 442 it87_write_value(data, IT87_REG_VIN_MIN(nr), 443 data->in_min[nr]); 444 mutex_unlock(&data->update_lock); 445 return count; 446 } 447 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 448 const char *buf, size_t count) 449 { 450 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 451 int nr = sensor_attr->index; 452 453 struct it87_data *data = dev_get_drvdata(dev); 454 unsigned long val; 455 456 if (strict_strtoul(buf, 10, &val) < 0) 457 return -EINVAL; 458 459 mutex_lock(&data->update_lock); 460 data->in_max[nr] = in_to_reg(data, nr, val); 461 it87_write_value(data, IT87_REG_VIN_MAX(nr), 462 data->in_max[nr]); 463 mutex_unlock(&data->update_lock); 464 return count; 465 } 466 467 #define show_in_offset(offset) \ 468 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 469 show_in, NULL, offset); 470 471 #define limit_in_offset(offset) \ 472 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 473 show_in_min, set_in_min, offset); \ 474 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 475 show_in_max, set_in_max, offset); 476 477 show_in_offset(0); 478 limit_in_offset(0); 479 show_in_offset(1); 480 limit_in_offset(1); 481 show_in_offset(2); 482 limit_in_offset(2); 483 show_in_offset(3); 484 limit_in_offset(3); 485 show_in_offset(4); 486 limit_in_offset(4); 487 show_in_offset(5); 488 limit_in_offset(5); 489 show_in_offset(6); 490 limit_in_offset(6); 491 show_in_offset(7); 492 limit_in_offset(7); 493 show_in_offset(8); 494 495 /* 3 temperatures */ 496 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 497 char *buf) 498 { 499 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 500 int nr = sensor_attr->index; 501 502 struct it87_data *data = it87_update_device(dev); 503 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 504 } 505 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 506 char *buf) 507 { 508 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 509 int nr = sensor_attr->index; 510 511 struct it87_data *data = it87_update_device(dev); 512 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); 513 } 514 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 515 char *buf) 516 { 517 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 518 int nr = sensor_attr->index; 519 520 struct it87_data *data = it87_update_device(dev); 521 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); 522 } 523 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 524 const char *buf, size_t count) 525 { 526 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 527 int nr = sensor_attr->index; 528 529 struct it87_data *data = dev_get_drvdata(dev); 530 long val; 531 532 if (strict_strtol(buf, 10, &val) < 0) 533 return -EINVAL; 534 535 mutex_lock(&data->update_lock); 536 data->temp_high[nr] = TEMP_TO_REG(val); 537 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); 538 mutex_unlock(&data->update_lock); 539 return count; 540 } 541 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 542 const char *buf, size_t count) 543 { 544 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 545 int nr = sensor_attr->index; 546 547 struct it87_data *data = dev_get_drvdata(dev); 548 long val; 549 550 if (strict_strtol(buf, 10, &val) < 0) 551 return -EINVAL; 552 553 mutex_lock(&data->update_lock); 554 data->temp_low[nr] = TEMP_TO_REG(val); 555 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); 556 mutex_unlock(&data->update_lock); 557 return count; 558 } 559 #define show_temp_offset(offset) \ 560 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 561 show_temp, NULL, offset - 1); \ 562 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 563 show_temp_max, set_temp_max, offset - 1); \ 564 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 565 show_temp_min, set_temp_min, offset - 1); 566 567 show_temp_offset(1); 568 show_temp_offset(2); 569 show_temp_offset(3); 570 571 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, 572 char *buf) 573 { 574 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 575 int nr = sensor_attr->index; 576 577 struct it87_data *data = it87_update_device(dev); 578 u8 reg = data->sensor; /* In case the value is updated while 579 we use it */ 580 581 if (reg & (1 << nr)) 582 return sprintf(buf, "3\n"); /* thermal diode */ 583 if (reg & (8 << nr)) 584 return sprintf(buf, "4\n"); /* thermistor */ 585 return sprintf(buf, "0\n"); /* disabled */ 586 } 587 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, 588 const char *buf, size_t count) 589 { 590 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 591 int nr = sensor_attr->index; 592 593 struct it87_data *data = dev_get_drvdata(dev); 594 long val; 595 u8 reg; 596 597 if (strict_strtol(buf, 10, &val) < 0) 598 return -EINVAL; 599 600 reg = it87_read_value(data, IT87_REG_TEMP_ENABLE); 601 reg &= ~(1 << nr); 602 reg &= ~(8 << nr); 603 if (val == 2) { /* backwards compatibility */ 604 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 " 605 "instead\n"); 606 val = 4; 607 } 608 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */ 609 if (val == 3) 610 reg |= 1 << nr; 611 else if (val == 4) 612 reg |= 8 << nr; 613 else if (val != 0) 614 return -EINVAL; 615 616 mutex_lock(&data->update_lock); 617 data->sensor = reg; 618 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor); 619 data->valid = 0; /* Force cache refresh */ 620 mutex_unlock(&data->update_lock); 621 return count; 622 } 623 #define show_sensor_offset(offset) \ 624 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ 625 show_sensor, set_sensor, offset - 1); 626 627 show_sensor_offset(1); 628 show_sensor_offset(2); 629 show_sensor_offset(3); 630 631 /* 3 Fans */ 632 633 static int pwm_mode(const struct it87_data *data, int nr) 634 { 635 int ctrl = data->fan_main_ctrl & (1 << nr); 636 637 if (ctrl == 0) /* Full speed */ 638 return 0; 639 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */ 640 return 2; 641 else /* Manual mode */ 642 return 1; 643 } 644 645 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 646 char *buf) 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 = it87_update_device(dev); 652 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 653 DIV_FROM_REG(data->fan_div[nr]))); 654 } 655 static ssize_t show_fan_min(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_min[nr], 663 DIV_FROM_REG(data->fan_div[nr]))); 664 } 665 static ssize_t show_fan_div(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", DIV_FROM_REG(data->fan_div[nr])); 673 } 674 static ssize_t show_pwm_enable(struct device *dev, 675 struct device_attribute *attr, char *buf) 676 { 677 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 678 int nr = sensor_attr->index; 679 680 struct it87_data *data = it87_update_device(dev); 681 return sprintf(buf, "%d\n", pwm_mode(data, nr)); 682 } 683 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 684 char *buf) 685 { 686 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 687 int nr = sensor_attr->index; 688 689 struct it87_data *data = it87_update_device(dev); 690 return sprintf(buf, "%d\n", 691 pwm_from_reg(data, data->pwm_duty[nr])); 692 } 693 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr, 694 char *buf) 695 { 696 struct it87_data *data = it87_update_device(dev); 697 int index = (data->fan_ctl >> 4) & 0x07; 698 699 return sprintf(buf, "%u\n", pwm_freq[index]); 700 } 701 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 702 const char *buf, size_t count) 703 { 704 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 705 int nr = sensor_attr->index; 706 707 struct it87_data *data = dev_get_drvdata(dev); 708 long val; 709 u8 reg; 710 711 if (strict_strtol(buf, 10, &val) < 0) 712 return -EINVAL; 713 714 mutex_lock(&data->update_lock); 715 reg = it87_read_value(data, IT87_REG_FAN_DIV); 716 switch (nr) { 717 case 0: 718 data->fan_div[nr] = reg & 0x07; 719 break; 720 case 1: 721 data->fan_div[nr] = (reg >> 3) & 0x07; 722 break; 723 case 2: 724 data->fan_div[nr] = (reg & 0x40) ? 3 : 1; 725 break; 726 } 727 728 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 729 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 730 mutex_unlock(&data->update_lock); 731 return count; 732 } 733 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 734 const char *buf, size_t count) 735 { 736 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 737 int nr = sensor_attr->index; 738 739 struct it87_data *data = dev_get_drvdata(dev); 740 unsigned long val; 741 int min; 742 u8 old; 743 744 if (strict_strtoul(buf, 10, &val) < 0) 745 return -EINVAL; 746 747 mutex_lock(&data->update_lock); 748 old = it87_read_value(data, IT87_REG_FAN_DIV); 749 750 /* Save fan min limit */ 751 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 752 753 switch (nr) { 754 case 0: 755 case 1: 756 data->fan_div[nr] = DIV_TO_REG(val); 757 break; 758 case 2: 759 if (val < 8) 760 data->fan_div[nr] = 1; 761 else 762 data->fan_div[nr] = 3; 763 } 764 val = old & 0x80; 765 val |= (data->fan_div[0] & 0x07); 766 val |= (data->fan_div[1] & 0x07) << 3; 767 if (data->fan_div[2] == 3) 768 val |= 0x1 << 6; 769 it87_write_value(data, IT87_REG_FAN_DIV, val); 770 771 /* Restore fan min limit */ 772 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 773 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 774 775 mutex_unlock(&data->update_lock); 776 return count; 777 } 778 779 /* Returns 0 if OK, -EINVAL otherwise */ 780 static int check_trip_points(struct device *dev, int nr) 781 { 782 const struct it87_data *data = dev_get_drvdata(dev); 783 int i, err = 0; 784 785 if (has_old_autopwm(data)) { 786 for (i = 0; i < 3; i++) { 787 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1]) 788 err = -EINVAL; 789 } 790 for (i = 0; i < 2; i++) { 791 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1]) 792 err = -EINVAL; 793 } 794 } 795 796 if (err) { 797 dev_err(dev, "Inconsistent trip points, not switching to " 798 "automatic mode\n"); 799 dev_err(dev, "Adjust the trip points and try again\n"); 800 } 801 return err; 802 } 803 804 static ssize_t set_pwm_enable(struct device *dev, 805 struct device_attribute *attr, const char *buf, size_t count) 806 { 807 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 808 int nr = sensor_attr->index; 809 810 struct it87_data *data = dev_get_drvdata(dev); 811 long val; 812 813 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2) 814 return -EINVAL; 815 816 /* Check trip points before switching to automatic mode */ 817 if (val == 2) { 818 if (check_trip_points(dev, nr) < 0) 819 return -EINVAL; 820 } 821 822 mutex_lock(&data->update_lock); 823 824 if (val == 0) { 825 int tmp; 826 /* make sure the fan is on when in on/off mode */ 827 tmp = it87_read_value(data, IT87_REG_FAN_CTL); 828 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr)); 829 /* set on/off mode */ 830 data->fan_main_ctrl &= ~(1 << nr); 831 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 832 data->fan_main_ctrl); 833 } else { 834 if (val == 1) /* Manual mode */ 835 data->pwm_ctrl[nr] = data->pwm_duty[nr]; 836 else /* Automatic mode */ 837 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 838 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 839 /* set SmartGuardian mode */ 840 data->fan_main_ctrl |= (1 << nr); 841 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 842 data->fan_main_ctrl); 843 } 844 845 mutex_unlock(&data->update_lock); 846 return count; 847 } 848 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 849 const char *buf, size_t count) 850 { 851 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 852 int nr = sensor_attr->index; 853 854 struct it87_data *data = dev_get_drvdata(dev); 855 long val; 856 857 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255) 858 return -EINVAL; 859 860 mutex_lock(&data->update_lock); 861 data->pwm_duty[nr] = pwm_to_reg(data, val); 862 /* If we are in manual mode, write the duty cycle immediately; 863 * otherwise, just store it for later use. */ 864 if (!(data->pwm_ctrl[nr] & 0x80)) { 865 data->pwm_ctrl[nr] = data->pwm_duty[nr]; 866 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 867 } 868 mutex_unlock(&data->update_lock); 869 return count; 870 } 871 static ssize_t set_pwm_freq(struct device *dev, 872 struct device_attribute *attr, const char *buf, size_t count) 873 { 874 struct it87_data *data = dev_get_drvdata(dev); 875 unsigned long val; 876 int i; 877 878 if (strict_strtoul(buf, 10, &val) < 0) 879 return -EINVAL; 880 881 /* Search for the nearest available frequency */ 882 for (i = 0; i < 7; i++) { 883 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2) 884 break; 885 } 886 887 mutex_lock(&data->update_lock); 888 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f; 889 data->fan_ctl |= i << 4; 890 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl); 891 mutex_unlock(&data->update_lock); 892 893 return count; 894 } 895 static ssize_t show_pwm_temp_map(struct device *dev, 896 struct device_attribute *attr, char *buf) 897 { 898 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 899 int nr = sensor_attr->index; 900 901 struct it87_data *data = it87_update_device(dev); 902 int map; 903 904 if (data->pwm_temp_map[nr] < 3) 905 map = 1 << data->pwm_temp_map[nr]; 906 else 907 map = 0; /* Should never happen */ 908 return sprintf(buf, "%d\n", map); 909 } 910 static ssize_t set_pwm_temp_map(struct device *dev, 911 struct device_attribute *attr, const char *buf, size_t count) 912 { 913 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 914 int nr = sensor_attr->index; 915 916 struct it87_data *data = dev_get_drvdata(dev); 917 long val; 918 u8 reg; 919 920 /* This check can go away if we ever support automatic fan speed 921 control on newer chips. */ 922 if (!has_old_autopwm(data)) { 923 dev_notice(dev, "Mapping change disabled for safety reasons\n"); 924 return -EINVAL; 925 } 926 927 if (strict_strtol(buf, 10, &val) < 0) 928 return -EINVAL; 929 930 switch (val) { 931 case (1 << 0): 932 reg = 0x00; 933 break; 934 case (1 << 1): 935 reg = 0x01; 936 break; 937 case (1 << 2): 938 reg = 0x02; 939 break; 940 default: 941 return -EINVAL; 942 } 943 944 mutex_lock(&data->update_lock); 945 data->pwm_temp_map[nr] = reg; 946 /* If we are in automatic mode, write the temp mapping immediately; 947 * otherwise, just store it for later use. */ 948 if (data->pwm_ctrl[nr] & 0x80) { 949 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 950 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 951 } 952 mutex_unlock(&data->update_lock); 953 return count; 954 } 955 956 static ssize_t show_auto_pwm(struct device *dev, 957 struct device_attribute *attr, char *buf) 958 { 959 struct it87_data *data = it87_update_device(dev); 960 struct sensor_device_attribute_2 *sensor_attr = 961 to_sensor_dev_attr_2(attr); 962 int nr = sensor_attr->nr; 963 int point = sensor_attr->index; 964 965 return sprintf(buf, "%d\n", 966 pwm_from_reg(data, data->auto_pwm[nr][point])); 967 } 968 969 static ssize_t set_auto_pwm(struct device *dev, 970 struct device_attribute *attr, const char *buf, size_t count) 971 { 972 struct it87_data *data = dev_get_drvdata(dev); 973 struct sensor_device_attribute_2 *sensor_attr = 974 to_sensor_dev_attr_2(attr); 975 int nr = sensor_attr->nr; 976 int point = sensor_attr->index; 977 long val; 978 979 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255) 980 return -EINVAL; 981 982 mutex_lock(&data->update_lock); 983 data->auto_pwm[nr][point] = pwm_to_reg(data, val); 984 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point), 985 data->auto_pwm[nr][point]); 986 mutex_unlock(&data->update_lock); 987 return count; 988 } 989 990 static ssize_t show_auto_temp(struct device *dev, 991 struct device_attribute *attr, char *buf) 992 { 993 struct it87_data *data = it87_update_device(dev); 994 struct sensor_device_attribute_2 *sensor_attr = 995 to_sensor_dev_attr_2(attr); 996 int nr = sensor_attr->nr; 997 int point = sensor_attr->index; 998 999 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point])); 1000 } 1001 1002 static ssize_t set_auto_temp(struct device *dev, 1003 struct device_attribute *attr, const char *buf, size_t count) 1004 { 1005 struct it87_data *data = dev_get_drvdata(dev); 1006 struct sensor_device_attribute_2 *sensor_attr = 1007 to_sensor_dev_attr_2(attr); 1008 int nr = sensor_attr->nr; 1009 int point = sensor_attr->index; 1010 long val; 1011 1012 if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000) 1013 return -EINVAL; 1014 1015 mutex_lock(&data->update_lock); 1016 data->auto_temp[nr][point] = TEMP_TO_REG(val); 1017 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point), 1018 data->auto_temp[nr][point]); 1019 mutex_unlock(&data->update_lock); 1020 return count; 1021 } 1022 1023 #define show_fan_offset(offset) \ 1024 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 1025 show_fan, NULL, offset - 1); \ 1026 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 1027 show_fan_min, set_fan_min, offset - 1); \ 1028 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 1029 show_fan_div, set_fan_div, offset - 1); 1030 1031 show_fan_offset(1); 1032 show_fan_offset(2); 1033 show_fan_offset(3); 1034 1035 #define show_pwm_offset(offset) \ 1036 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 1037 show_pwm_enable, set_pwm_enable, offset - 1); \ 1038 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 1039 show_pwm, set_pwm, offset - 1); \ 1040 static DEVICE_ATTR(pwm##offset##_freq, \ 1041 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \ 1042 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \ 1043 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \ 1044 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \ 1045 offset - 1); \ 1046 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \ 1047 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1048 offset - 1, 0); \ 1049 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \ 1050 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1051 offset - 1, 1); \ 1052 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \ 1053 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1054 offset - 1, 2); \ 1055 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \ 1056 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \ 1057 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \ 1058 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1059 offset - 1, 1); \ 1060 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \ 1061 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1062 offset - 1, 0); \ 1063 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \ 1064 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1065 offset - 1, 2); \ 1066 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \ 1067 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1068 offset - 1, 3); \ 1069 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \ 1070 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1071 offset - 1, 4); 1072 1073 show_pwm_offset(1); 1074 show_pwm_offset(2); 1075 show_pwm_offset(3); 1076 1077 /* A different set of callbacks for 16-bit fans */ 1078 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr, 1079 char *buf) 1080 { 1081 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1082 int nr = sensor_attr->index; 1083 struct it87_data *data = it87_update_device(dev); 1084 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr])); 1085 } 1086 1087 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr, 1088 char *buf) 1089 { 1090 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1091 int nr = sensor_attr->index; 1092 struct it87_data *data = it87_update_device(dev); 1093 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr])); 1094 } 1095 1096 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr, 1097 const char *buf, size_t count) 1098 { 1099 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1100 int nr = sensor_attr->index; 1101 struct it87_data *data = dev_get_drvdata(dev); 1102 long val; 1103 1104 if (strict_strtol(buf, 10, &val) < 0) 1105 return -EINVAL; 1106 1107 mutex_lock(&data->update_lock); 1108 data->fan_min[nr] = FAN16_TO_REG(val); 1109 it87_write_value(data, IT87_REG_FAN_MIN[nr], 1110 data->fan_min[nr] & 0xff); 1111 it87_write_value(data, IT87_REG_FANX_MIN[nr], 1112 data->fan_min[nr] >> 8); 1113 mutex_unlock(&data->update_lock); 1114 return count; 1115 } 1116 1117 /* We want to use the same sysfs file names as 8-bit fans, but we need 1118 different variable names, so we have to use SENSOR_ATTR instead of 1119 SENSOR_DEVICE_ATTR. */ 1120 #define show_fan16_offset(offset) \ 1121 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \ 1122 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \ 1123 show_fan16, NULL, offset - 1); \ 1124 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \ 1125 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 1126 show_fan16_min, set_fan16_min, offset - 1) 1127 1128 show_fan16_offset(1); 1129 show_fan16_offset(2); 1130 show_fan16_offset(3); 1131 show_fan16_offset(4); 1132 show_fan16_offset(5); 1133 1134 /* Alarms */ 1135 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 1136 char *buf) 1137 { 1138 struct it87_data *data = it87_update_device(dev); 1139 return sprintf(buf, "%u\n", data->alarms); 1140 } 1141 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 1142 1143 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 1144 char *buf) 1145 { 1146 int bitnr = to_sensor_dev_attr(attr)->index; 1147 struct it87_data *data = it87_update_device(dev); 1148 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 1149 } 1150 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8); 1151 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9); 1152 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10); 1153 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11); 1154 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12); 1155 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13); 1156 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14); 1157 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15); 1158 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0); 1159 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1); 1160 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2); 1161 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3); 1162 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6); 1163 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16); 1164 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17); 1165 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18); 1166 1167 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 1168 char *buf) 1169 { 1170 int bitnr = to_sensor_dev_attr(attr)->index; 1171 struct it87_data *data = it87_update_device(dev); 1172 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1); 1173 } 1174 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 1175 const char *buf, size_t count) 1176 { 1177 int bitnr = to_sensor_dev_attr(attr)->index; 1178 struct it87_data *data = dev_get_drvdata(dev); 1179 long val; 1180 1181 if (strict_strtol(buf, 10, &val) < 0 1182 || (val != 0 && val != 1)) 1183 return -EINVAL; 1184 1185 mutex_lock(&data->update_lock); 1186 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE); 1187 if (val) 1188 data->beeps |= (1 << bitnr); 1189 else 1190 data->beeps &= ~(1 << bitnr); 1191 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps); 1192 mutex_unlock(&data->update_lock); 1193 return count; 1194 } 1195 1196 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, 1197 show_beep, set_beep, 1); 1198 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1); 1199 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1); 1200 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1); 1201 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1); 1202 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1); 1203 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1); 1204 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1); 1205 /* fanX_beep writability is set later */ 1206 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0); 1207 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0); 1208 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0); 1209 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0); 1210 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0); 1211 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, 1212 show_beep, set_beep, 2); 1213 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2); 1214 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2); 1215 1216 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr, 1217 char *buf) 1218 { 1219 struct it87_data *data = dev_get_drvdata(dev); 1220 return sprintf(buf, "%u\n", data->vrm); 1221 } 1222 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr, 1223 const char *buf, size_t count) 1224 { 1225 struct it87_data *data = dev_get_drvdata(dev); 1226 unsigned long val; 1227 1228 if (strict_strtoul(buf, 10, &val) < 0) 1229 return -EINVAL; 1230 1231 data->vrm = val; 1232 1233 return count; 1234 } 1235 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 1236 1237 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr, 1238 char *buf) 1239 { 1240 struct it87_data *data = it87_update_device(dev); 1241 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 1242 } 1243 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 1244 1245 static ssize_t show_label(struct device *dev, struct device_attribute *attr, 1246 char *buf) 1247 { 1248 static const char *labels[] = { 1249 "+5V", 1250 "5VSB", 1251 "Vbat", 1252 }; 1253 static const char *labels_it8721[] = { 1254 "+3.3V", 1255 "3VSB", 1256 "Vbat", 1257 }; 1258 struct it87_data *data = dev_get_drvdata(dev); 1259 int nr = to_sensor_dev_attr(attr)->index; 1260 1261 return sprintf(buf, "%s\n", data->type == it8721 ? labels_it8721[nr] 1262 : labels[nr]); 1263 } 1264 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0); 1265 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1); 1266 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2); 1267 1268 static ssize_t show_name(struct device *dev, struct device_attribute 1269 *devattr, char *buf) 1270 { 1271 struct it87_data *data = dev_get_drvdata(dev); 1272 return sprintf(buf, "%s\n", data->name); 1273 } 1274 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 1275 1276 static struct attribute *it87_attributes[] = { 1277 &sensor_dev_attr_in0_input.dev_attr.attr, 1278 &sensor_dev_attr_in1_input.dev_attr.attr, 1279 &sensor_dev_attr_in2_input.dev_attr.attr, 1280 &sensor_dev_attr_in3_input.dev_attr.attr, 1281 &sensor_dev_attr_in4_input.dev_attr.attr, 1282 &sensor_dev_attr_in5_input.dev_attr.attr, 1283 &sensor_dev_attr_in6_input.dev_attr.attr, 1284 &sensor_dev_attr_in7_input.dev_attr.attr, 1285 &sensor_dev_attr_in8_input.dev_attr.attr, 1286 &sensor_dev_attr_in0_min.dev_attr.attr, 1287 &sensor_dev_attr_in1_min.dev_attr.attr, 1288 &sensor_dev_attr_in2_min.dev_attr.attr, 1289 &sensor_dev_attr_in3_min.dev_attr.attr, 1290 &sensor_dev_attr_in4_min.dev_attr.attr, 1291 &sensor_dev_attr_in5_min.dev_attr.attr, 1292 &sensor_dev_attr_in6_min.dev_attr.attr, 1293 &sensor_dev_attr_in7_min.dev_attr.attr, 1294 &sensor_dev_attr_in0_max.dev_attr.attr, 1295 &sensor_dev_attr_in1_max.dev_attr.attr, 1296 &sensor_dev_attr_in2_max.dev_attr.attr, 1297 &sensor_dev_attr_in3_max.dev_attr.attr, 1298 &sensor_dev_attr_in4_max.dev_attr.attr, 1299 &sensor_dev_attr_in5_max.dev_attr.attr, 1300 &sensor_dev_attr_in6_max.dev_attr.attr, 1301 &sensor_dev_attr_in7_max.dev_attr.attr, 1302 &sensor_dev_attr_in0_alarm.dev_attr.attr, 1303 &sensor_dev_attr_in1_alarm.dev_attr.attr, 1304 &sensor_dev_attr_in2_alarm.dev_attr.attr, 1305 &sensor_dev_attr_in3_alarm.dev_attr.attr, 1306 &sensor_dev_attr_in4_alarm.dev_attr.attr, 1307 &sensor_dev_attr_in5_alarm.dev_attr.attr, 1308 &sensor_dev_attr_in6_alarm.dev_attr.attr, 1309 &sensor_dev_attr_in7_alarm.dev_attr.attr, 1310 1311 &sensor_dev_attr_temp1_input.dev_attr.attr, 1312 &sensor_dev_attr_temp2_input.dev_attr.attr, 1313 &sensor_dev_attr_temp3_input.dev_attr.attr, 1314 &sensor_dev_attr_temp1_max.dev_attr.attr, 1315 &sensor_dev_attr_temp2_max.dev_attr.attr, 1316 &sensor_dev_attr_temp3_max.dev_attr.attr, 1317 &sensor_dev_attr_temp1_min.dev_attr.attr, 1318 &sensor_dev_attr_temp2_min.dev_attr.attr, 1319 &sensor_dev_attr_temp3_min.dev_attr.attr, 1320 &sensor_dev_attr_temp1_type.dev_attr.attr, 1321 &sensor_dev_attr_temp2_type.dev_attr.attr, 1322 &sensor_dev_attr_temp3_type.dev_attr.attr, 1323 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1324 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1325 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1326 1327 &dev_attr_alarms.attr, 1328 &dev_attr_name.attr, 1329 NULL 1330 }; 1331 1332 static const struct attribute_group it87_group = { 1333 .attrs = it87_attributes, 1334 }; 1335 1336 static struct attribute *it87_attributes_beep[] = { 1337 &sensor_dev_attr_in0_beep.dev_attr.attr, 1338 &sensor_dev_attr_in1_beep.dev_attr.attr, 1339 &sensor_dev_attr_in2_beep.dev_attr.attr, 1340 &sensor_dev_attr_in3_beep.dev_attr.attr, 1341 &sensor_dev_attr_in4_beep.dev_attr.attr, 1342 &sensor_dev_attr_in5_beep.dev_attr.attr, 1343 &sensor_dev_attr_in6_beep.dev_attr.attr, 1344 &sensor_dev_attr_in7_beep.dev_attr.attr, 1345 1346 &sensor_dev_attr_temp1_beep.dev_attr.attr, 1347 &sensor_dev_attr_temp2_beep.dev_attr.attr, 1348 &sensor_dev_attr_temp3_beep.dev_attr.attr, 1349 NULL 1350 }; 1351 1352 static const struct attribute_group it87_group_beep = { 1353 .attrs = it87_attributes_beep, 1354 }; 1355 1356 static struct attribute *it87_attributes_fan16[5][3+1] = { { 1357 &sensor_dev_attr_fan1_input16.dev_attr.attr, 1358 &sensor_dev_attr_fan1_min16.dev_attr.attr, 1359 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1360 NULL 1361 }, { 1362 &sensor_dev_attr_fan2_input16.dev_attr.attr, 1363 &sensor_dev_attr_fan2_min16.dev_attr.attr, 1364 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1365 NULL 1366 }, { 1367 &sensor_dev_attr_fan3_input16.dev_attr.attr, 1368 &sensor_dev_attr_fan3_min16.dev_attr.attr, 1369 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1370 NULL 1371 }, { 1372 &sensor_dev_attr_fan4_input16.dev_attr.attr, 1373 &sensor_dev_attr_fan4_min16.dev_attr.attr, 1374 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1375 NULL 1376 }, { 1377 &sensor_dev_attr_fan5_input16.dev_attr.attr, 1378 &sensor_dev_attr_fan5_min16.dev_attr.attr, 1379 &sensor_dev_attr_fan5_alarm.dev_attr.attr, 1380 NULL 1381 } }; 1382 1383 static const struct attribute_group it87_group_fan16[5] = { 1384 { .attrs = it87_attributes_fan16[0] }, 1385 { .attrs = it87_attributes_fan16[1] }, 1386 { .attrs = it87_attributes_fan16[2] }, 1387 { .attrs = it87_attributes_fan16[3] }, 1388 { .attrs = it87_attributes_fan16[4] }, 1389 }; 1390 1391 static struct attribute *it87_attributes_fan[3][4+1] = { { 1392 &sensor_dev_attr_fan1_input.dev_attr.attr, 1393 &sensor_dev_attr_fan1_min.dev_attr.attr, 1394 &sensor_dev_attr_fan1_div.dev_attr.attr, 1395 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1396 NULL 1397 }, { 1398 &sensor_dev_attr_fan2_input.dev_attr.attr, 1399 &sensor_dev_attr_fan2_min.dev_attr.attr, 1400 &sensor_dev_attr_fan2_div.dev_attr.attr, 1401 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1402 NULL 1403 }, { 1404 &sensor_dev_attr_fan3_input.dev_attr.attr, 1405 &sensor_dev_attr_fan3_min.dev_attr.attr, 1406 &sensor_dev_attr_fan3_div.dev_attr.attr, 1407 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1408 NULL 1409 } }; 1410 1411 static const struct attribute_group it87_group_fan[3] = { 1412 { .attrs = it87_attributes_fan[0] }, 1413 { .attrs = it87_attributes_fan[1] }, 1414 { .attrs = it87_attributes_fan[2] }, 1415 }; 1416 1417 static const struct attribute_group * 1418 it87_get_fan_group(const struct it87_data *data) 1419 { 1420 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan; 1421 } 1422 1423 static struct attribute *it87_attributes_pwm[3][4+1] = { { 1424 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1425 &sensor_dev_attr_pwm1.dev_attr.attr, 1426 &dev_attr_pwm1_freq.attr, 1427 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, 1428 NULL 1429 }, { 1430 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1431 &sensor_dev_attr_pwm2.dev_attr.attr, 1432 &dev_attr_pwm2_freq.attr, 1433 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr, 1434 NULL 1435 }, { 1436 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1437 &sensor_dev_attr_pwm3.dev_attr.attr, 1438 &dev_attr_pwm3_freq.attr, 1439 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, 1440 NULL 1441 } }; 1442 1443 static const struct attribute_group it87_group_pwm[3] = { 1444 { .attrs = it87_attributes_pwm[0] }, 1445 { .attrs = it87_attributes_pwm[1] }, 1446 { .attrs = it87_attributes_pwm[2] }, 1447 }; 1448 1449 static struct attribute *it87_attributes_autopwm[3][9+1] = { { 1450 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1451 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1452 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 1453 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 1454 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 1455 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 1456 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 1457 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 1458 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 1459 NULL 1460 }, { 1461 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, 1462 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, 1463 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr, 1464 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr, 1465 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr, 1466 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr, 1467 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr, 1468 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr, 1469 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr, 1470 NULL 1471 }, { 1472 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, 1473 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, 1474 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr, 1475 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr, 1476 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr, 1477 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr, 1478 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr, 1479 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr, 1480 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr, 1481 NULL 1482 } }; 1483 1484 static const struct attribute_group it87_group_autopwm[3] = { 1485 { .attrs = it87_attributes_autopwm[0] }, 1486 { .attrs = it87_attributes_autopwm[1] }, 1487 { .attrs = it87_attributes_autopwm[2] }, 1488 }; 1489 1490 static struct attribute *it87_attributes_fan_beep[] = { 1491 &sensor_dev_attr_fan1_beep.dev_attr.attr, 1492 &sensor_dev_attr_fan2_beep.dev_attr.attr, 1493 &sensor_dev_attr_fan3_beep.dev_attr.attr, 1494 &sensor_dev_attr_fan4_beep.dev_attr.attr, 1495 &sensor_dev_attr_fan5_beep.dev_attr.attr, 1496 }; 1497 1498 static struct attribute *it87_attributes_vid[] = { 1499 &dev_attr_vrm.attr, 1500 &dev_attr_cpu0_vid.attr, 1501 NULL 1502 }; 1503 1504 static const struct attribute_group it87_group_vid = { 1505 .attrs = it87_attributes_vid, 1506 }; 1507 1508 static struct attribute *it87_attributes_label[] = { 1509 &sensor_dev_attr_in3_label.dev_attr.attr, 1510 &sensor_dev_attr_in7_label.dev_attr.attr, 1511 &sensor_dev_attr_in8_label.dev_attr.attr, 1512 NULL 1513 }; 1514 1515 static const struct attribute_group it87_group_label = { 1516 .attrs = it87_attributes_vid, 1517 }; 1518 1519 /* SuperIO detection - will change isa_address if a chip is found */ 1520 static int __init it87_find(unsigned short *address, 1521 struct it87_sio_data *sio_data) 1522 { 1523 int err = -ENODEV; 1524 u16 chip_type; 1525 const char *board_vendor, *board_name; 1526 1527 superio_enter(); 1528 chip_type = force_id ? force_id : superio_inw(DEVID); 1529 1530 switch (chip_type) { 1531 case IT8705F_DEVID: 1532 sio_data->type = it87; 1533 break; 1534 case IT8712F_DEVID: 1535 sio_data->type = it8712; 1536 break; 1537 case IT8716F_DEVID: 1538 case IT8726F_DEVID: 1539 sio_data->type = it8716; 1540 break; 1541 case IT8718F_DEVID: 1542 sio_data->type = it8718; 1543 break; 1544 case IT8720F_DEVID: 1545 sio_data->type = it8720; 1546 break; 1547 case IT8721F_DEVID: 1548 sio_data->type = it8721; 1549 break; 1550 case 0xffff: /* No device at all */ 1551 goto exit; 1552 default: 1553 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n", 1554 chip_type); 1555 goto exit; 1556 } 1557 1558 superio_select(PME); 1559 if (!(superio_inb(IT87_ACT_REG) & 0x01)) { 1560 pr_info("it87: Device not activated, skipping\n"); 1561 goto exit; 1562 } 1563 1564 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); 1565 if (*address == 0) { 1566 pr_info("it87: Base address not set, skipping\n"); 1567 goto exit; 1568 } 1569 1570 err = 0; 1571 sio_data->revision = superio_inb(DEVREV) & 0x0f; 1572 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n", 1573 chip_type, *address, sio_data->revision); 1574 1575 /* in8 (Vbat) is always internal */ 1576 sio_data->internal = (1 << 2); 1577 1578 /* Read GPIO config and VID value from LDN 7 (GPIO) */ 1579 if (sio_data->type == it87) { 1580 /* The IT8705F doesn't have VID pins at all */ 1581 sio_data->skip_vid = 1; 1582 1583 /* The IT8705F has a different LD number for GPIO */ 1584 superio_select(5); 1585 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1586 } else { 1587 int reg; 1588 1589 superio_select(GPIO); 1590 1591 reg = superio_inb(IT87_SIO_GPIO3_REG); 1592 if (sio_data->type == it8721) { 1593 /* The IT8721F/IT8758E doesn't have VID pins at all */ 1594 sio_data->skip_vid = 1; 1595 } else { 1596 /* We need at least 4 VID pins */ 1597 if (reg & 0x0f) { 1598 pr_info("it87: VID is disabled (pins used for GPIO)\n"); 1599 sio_data->skip_vid = 1; 1600 } 1601 } 1602 1603 /* Check if fan3 is there or not */ 1604 if (reg & (1 << 6)) 1605 sio_data->skip_pwm |= (1 << 2); 1606 if (reg & (1 << 7)) 1607 sio_data->skip_fan |= (1 << 2); 1608 1609 /* Check if fan2 is there or not */ 1610 reg = superio_inb(IT87_SIO_GPIO5_REG); 1611 if (reg & (1 << 1)) 1612 sio_data->skip_pwm |= (1 << 1); 1613 if (reg & (1 << 2)) 1614 sio_data->skip_fan |= (1 << 1); 1615 1616 if ((sio_data->type == it8718 || sio_data->type == it8720) 1617 && !(sio_data->skip_vid)) 1618 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG); 1619 1620 reg = superio_inb(IT87_SIO_PINX2_REG); 1621 /* 1622 * The IT8720F has no VIN7 pin, so VCCH should always be 1623 * routed internally to VIN7 with an internal divider. 1624 * Curiously, there still is a configuration bit to control 1625 * this, which means it can be set incorrectly. And even 1626 * more curiously, many boards out there are improperly 1627 * configured, even though the IT8720F datasheet claims 1628 * that the internal routing of VCCH to VIN7 is the default 1629 * setting. So we force the internal routing in this case. 1630 */ 1631 if (sio_data->type == it8720 && !(reg & (1 << 1))) { 1632 reg |= (1 << 1); 1633 superio_outb(IT87_SIO_PINX2_REG, reg); 1634 pr_notice("it87: Routing internal VCCH to in7\n"); 1635 } 1636 if (reg & (1 << 0)) 1637 sio_data->internal |= (1 << 0); 1638 if ((reg & (1 << 1)) || sio_data->type == it8721) 1639 sio_data->internal |= (1 << 1); 1640 1641 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1642 } 1643 if (sio_data->beep_pin) 1644 pr_info("it87: Beeping is supported\n"); 1645 1646 /* Disable specific features based on DMI strings */ 1647 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR); 1648 board_name = dmi_get_system_info(DMI_BOARD_NAME); 1649 if (board_vendor && board_name) { 1650 if (strcmp(board_vendor, "nVIDIA") == 0 1651 && strcmp(board_name, "FN68PT") == 0) { 1652 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not 1653 connected to a fan, but to something else. One user 1654 has reported instant system power-off when changing 1655 the PWM2 duty cycle, so we disable it. 1656 I use the board name string as the trigger in case 1657 the same board is ever used in other systems. */ 1658 pr_info("it87: Disabling pwm2 due to " 1659 "hardware constraints\n"); 1660 sio_data->skip_pwm = (1 << 1); 1661 } 1662 } 1663 1664 exit: 1665 superio_exit(); 1666 return err; 1667 } 1668 1669 static void it87_remove_files(struct device *dev) 1670 { 1671 struct it87_data *data = platform_get_drvdata(pdev); 1672 struct it87_sio_data *sio_data = dev->platform_data; 1673 const struct attribute_group *fan_group = it87_get_fan_group(data); 1674 int i; 1675 1676 sysfs_remove_group(&dev->kobj, &it87_group); 1677 if (sio_data->beep_pin) 1678 sysfs_remove_group(&dev->kobj, &it87_group_beep); 1679 for (i = 0; i < 5; i++) { 1680 if (!(data->has_fan & (1 << i))) 1681 continue; 1682 sysfs_remove_group(&dev->kobj, &fan_group[i]); 1683 if (sio_data->beep_pin) 1684 sysfs_remove_file(&dev->kobj, 1685 it87_attributes_fan_beep[i]); 1686 } 1687 for (i = 0; i < 3; i++) { 1688 if (sio_data->skip_pwm & (1 << 0)) 1689 continue; 1690 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]); 1691 if (has_old_autopwm(data)) 1692 sysfs_remove_group(&dev->kobj, 1693 &it87_group_autopwm[i]); 1694 } 1695 if (!sio_data->skip_vid) 1696 sysfs_remove_group(&dev->kobj, &it87_group_vid); 1697 sysfs_remove_group(&dev->kobj, &it87_group_label); 1698 } 1699 1700 static int __devinit it87_probe(struct platform_device *pdev) 1701 { 1702 struct it87_data *data; 1703 struct resource *res; 1704 struct device *dev = &pdev->dev; 1705 struct it87_sio_data *sio_data = dev->platform_data; 1706 const struct attribute_group *fan_group; 1707 int err = 0, i; 1708 int enable_pwm_interface; 1709 int fan_beep_need_rw; 1710 static const char *names[] = { 1711 "it87", 1712 "it8712", 1713 "it8716", 1714 "it8718", 1715 "it8720", 1716 "it8721", 1717 }; 1718 1719 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1720 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) { 1721 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", 1722 (unsigned long)res->start, 1723 (unsigned long)(res->start + IT87_EC_EXTENT - 1)); 1724 err = -EBUSY; 1725 goto ERROR0; 1726 } 1727 1728 data = kzalloc(sizeof(struct it87_data), GFP_KERNEL); 1729 if (!data) { 1730 err = -ENOMEM; 1731 goto ERROR1; 1732 } 1733 1734 data->addr = res->start; 1735 data->type = sio_data->type; 1736 data->revision = sio_data->revision; 1737 data->name = names[sio_data->type]; 1738 1739 /* Now, we do the remaining detection. */ 1740 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80) 1741 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) { 1742 err = -ENODEV; 1743 goto ERROR2; 1744 } 1745 1746 platform_set_drvdata(pdev, data); 1747 1748 mutex_init(&data->update_lock); 1749 1750 /* Check PWM configuration */ 1751 enable_pwm_interface = it87_check_pwm(dev); 1752 1753 /* Starting with IT8721F, we handle scaling of internal voltages */ 1754 if (data->type == it8721) { 1755 if (sio_data->internal & (1 << 0)) 1756 data->in_scaled |= (1 << 3); /* in3 is AVCC */ 1757 if (sio_data->internal & (1 << 1)) 1758 data->in_scaled |= (1 << 7); /* in7 is VSB */ 1759 if (sio_data->internal & (1 << 2)) 1760 data->in_scaled |= (1 << 8); /* in8 is Vbat */ 1761 } 1762 1763 /* Initialize the IT87 chip */ 1764 it87_init_device(pdev); 1765 1766 /* Register sysfs hooks */ 1767 err = sysfs_create_group(&dev->kobj, &it87_group); 1768 if (err) 1769 goto ERROR2; 1770 1771 if (sio_data->beep_pin) { 1772 err = sysfs_create_group(&dev->kobj, &it87_group_beep); 1773 if (err) 1774 goto ERROR4; 1775 } 1776 1777 /* Do not create fan files for disabled fans */ 1778 fan_group = it87_get_fan_group(data); 1779 fan_beep_need_rw = 1; 1780 for (i = 0; i < 5; i++) { 1781 if (!(data->has_fan & (1 << i))) 1782 continue; 1783 err = sysfs_create_group(&dev->kobj, &fan_group[i]); 1784 if (err) 1785 goto ERROR4; 1786 1787 if (sio_data->beep_pin) { 1788 err = sysfs_create_file(&dev->kobj, 1789 it87_attributes_fan_beep[i]); 1790 if (err) 1791 goto ERROR4; 1792 if (!fan_beep_need_rw) 1793 continue; 1794 1795 /* As we have a single beep enable bit for all fans, 1796 * only the first enabled fan has a writable attribute 1797 * for it. */ 1798 if (sysfs_chmod_file(&dev->kobj, 1799 it87_attributes_fan_beep[i], 1800 S_IRUGO | S_IWUSR)) 1801 dev_dbg(dev, "chmod +w fan%d_beep failed\n", 1802 i + 1); 1803 fan_beep_need_rw = 0; 1804 } 1805 } 1806 1807 if (enable_pwm_interface) { 1808 for (i = 0; i < 3; i++) { 1809 if (sio_data->skip_pwm & (1 << i)) 1810 continue; 1811 err = sysfs_create_group(&dev->kobj, 1812 &it87_group_pwm[i]); 1813 if (err) 1814 goto ERROR4; 1815 1816 if (!has_old_autopwm(data)) 1817 continue; 1818 err = sysfs_create_group(&dev->kobj, 1819 &it87_group_autopwm[i]); 1820 if (err) 1821 goto ERROR4; 1822 } 1823 } 1824 1825 if (!sio_data->skip_vid) { 1826 data->vrm = vid_which_vrm(); 1827 /* VID reading from Super-I/O config space if available */ 1828 data->vid = sio_data->vid_value; 1829 err = sysfs_create_group(&dev->kobj, &it87_group_vid); 1830 if (err) 1831 goto ERROR4; 1832 } 1833 1834 /* Export labels for internal sensors */ 1835 for (i = 0; i < 3; i++) { 1836 if (!(sio_data->internal & (1 << i))) 1837 continue; 1838 err = sysfs_create_file(&dev->kobj, 1839 it87_attributes_label[i]); 1840 if (err) 1841 goto ERROR4; 1842 } 1843 1844 data->hwmon_dev = hwmon_device_register(dev); 1845 if (IS_ERR(data->hwmon_dev)) { 1846 err = PTR_ERR(data->hwmon_dev); 1847 goto ERROR4; 1848 } 1849 1850 return 0; 1851 1852 ERROR4: 1853 it87_remove_files(dev); 1854 ERROR2: 1855 platform_set_drvdata(pdev, NULL); 1856 kfree(data); 1857 ERROR1: 1858 release_region(res->start, IT87_EC_EXTENT); 1859 ERROR0: 1860 return err; 1861 } 1862 1863 static int __devexit it87_remove(struct platform_device *pdev) 1864 { 1865 struct it87_data *data = platform_get_drvdata(pdev); 1866 1867 hwmon_device_unregister(data->hwmon_dev); 1868 it87_remove_files(&pdev->dev); 1869 1870 release_region(data->addr, IT87_EC_EXTENT); 1871 platform_set_drvdata(pdev, NULL); 1872 kfree(data); 1873 1874 return 0; 1875 } 1876 1877 /* Must be called with data->update_lock held, except during initialization. 1878 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1879 would slow down the IT87 access and should not be necessary. */ 1880 static int it87_read_value(struct it87_data *data, u8 reg) 1881 { 1882 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1883 return inb_p(data->addr + IT87_DATA_REG_OFFSET); 1884 } 1885 1886 /* Must be called with data->update_lock held, except during initialization. 1887 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1888 would slow down the IT87 access and should not be necessary. */ 1889 static void it87_write_value(struct it87_data *data, u8 reg, u8 value) 1890 { 1891 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1892 outb_p(value, data->addr + IT87_DATA_REG_OFFSET); 1893 } 1894 1895 /* Return 1 if and only if the PWM interface is safe to use */ 1896 static int __devinit it87_check_pwm(struct device *dev) 1897 { 1898 struct it87_data *data = dev_get_drvdata(dev); 1899 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off 1900 * and polarity set to active low is sign that this is the case so we 1901 * disable pwm control to protect the user. */ 1902 int tmp = it87_read_value(data, IT87_REG_FAN_CTL); 1903 if ((tmp & 0x87) == 0) { 1904 if (fix_pwm_polarity) { 1905 /* The user asks us to attempt a chip reconfiguration. 1906 * This means switching to active high polarity and 1907 * inverting all fan speed values. */ 1908 int i; 1909 u8 pwm[3]; 1910 1911 for (i = 0; i < 3; i++) 1912 pwm[i] = it87_read_value(data, 1913 IT87_REG_PWM(i)); 1914 1915 /* If any fan is in automatic pwm mode, the polarity 1916 * might be correct, as suspicious as it seems, so we 1917 * better don't change anything (but still disable the 1918 * PWM interface). */ 1919 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) { 1920 dev_info(dev, "Reconfiguring PWM to " 1921 "active high polarity\n"); 1922 it87_write_value(data, IT87_REG_FAN_CTL, 1923 tmp | 0x87); 1924 for (i = 0; i < 3; i++) 1925 it87_write_value(data, 1926 IT87_REG_PWM(i), 1927 0x7f & ~pwm[i]); 1928 return 1; 1929 } 1930 1931 dev_info(dev, "PWM configuration is " 1932 "too broken to be fixed\n"); 1933 } 1934 1935 dev_info(dev, "Detected broken BIOS " 1936 "defaults, disabling PWM interface\n"); 1937 return 0; 1938 } else if (fix_pwm_polarity) { 1939 dev_info(dev, "PWM configuration looks " 1940 "sane, won't touch\n"); 1941 } 1942 1943 return 1; 1944 } 1945 1946 /* Called when we have found a new IT87. */ 1947 static void __devinit it87_init_device(struct platform_device *pdev) 1948 { 1949 struct it87_sio_data *sio_data = pdev->dev.platform_data; 1950 struct it87_data *data = platform_get_drvdata(pdev); 1951 int tmp, i; 1952 u8 mask; 1953 1954 /* For each PWM channel: 1955 * - If it is in automatic mode, setting to manual mode should set 1956 * the fan to full speed by default. 1957 * - If it is in manual mode, we need a mapping to temperature 1958 * channels to use when later setting to automatic mode later. 1959 * Use a 1:1 mapping by default (we are clueless.) 1960 * In both cases, the value can (and should) be changed by the user 1961 * prior to switching to a different mode. */ 1962 for (i = 0; i < 3; i++) { 1963 data->pwm_temp_map[i] = i; 1964 data->pwm_duty[i] = 0x7f; /* Full speed */ 1965 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */ 1966 } 1967 1968 /* Some chips seem to have default value 0xff for all limit 1969 * registers. For low voltage limits it makes no sense and triggers 1970 * alarms, so change to 0 instead. For high temperature limits, it 1971 * means -1 degree C, which surprisingly doesn't trigger an alarm, 1972 * but is still confusing, so change to 127 degrees C. */ 1973 for (i = 0; i < 8; i++) { 1974 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i)); 1975 if (tmp == 0xff) 1976 it87_write_value(data, IT87_REG_VIN_MIN(i), 0); 1977 } 1978 for (i = 0; i < 3; i++) { 1979 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1980 if (tmp == 0xff) 1981 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127); 1982 } 1983 1984 /* Temperature channels are not forcibly enabled, as they can be 1985 * set to two different sensor types and we can't guess which one 1986 * is correct for a given system. These channels can be enabled at 1987 * run-time through the temp{1-3}_type sysfs accessors if needed. */ 1988 1989 /* Check if voltage monitors are reset manually or by some reason */ 1990 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE); 1991 if ((tmp & 0xff) == 0) { 1992 /* Enable all voltage monitors */ 1993 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff); 1994 } 1995 1996 /* Check if tachometers are reset manually or by some reason */ 1997 mask = 0x70 & ~(sio_data->skip_fan << 4); 1998 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL); 1999 if ((data->fan_main_ctrl & mask) == 0) { 2000 /* Enable all fan tachometers */ 2001 data->fan_main_ctrl |= mask; 2002 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 2003 data->fan_main_ctrl); 2004 } 2005 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07; 2006 2007 /* Set tachometers to 16-bit mode if needed */ 2008 if (has_16bit_fans(data)) { 2009 tmp = it87_read_value(data, IT87_REG_FAN_16BIT); 2010 if (~tmp & 0x07 & data->has_fan) { 2011 dev_dbg(&pdev->dev, 2012 "Setting fan1-3 to 16-bit mode\n"); 2013 it87_write_value(data, IT87_REG_FAN_16BIT, 2014 tmp | 0x07); 2015 } 2016 /* IT8705F only supports three fans. */ 2017 if (data->type != it87) { 2018 if (tmp & (1 << 4)) 2019 data->has_fan |= (1 << 3); /* fan4 enabled */ 2020 if (tmp & (1 << 5)) 2021 data->has_fan |= (1 << 4); /* fan5 enabled */ 2022 } 2023 } 2024 2025 /* Fan input pins may be used for alternative functions */ 2026 data->has_fan &= ~sio_data->skip_fan; 2027 2028 /* Start monitoring */ 2029 it87_write_value(data, IT87_REG_CONFIG, 2030 (it87_read_value(data, IT87_REG_CONFIG) & 0x36) 2031 | (update_vbat ? 0x41 : 0x01)); 2032 } 2033 2034 static void it87_update_pwm_ctrl(struct it87_data *data, int nr) 2035 { 2036 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr)); 2037 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */ 2038 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03; 2039 else /* Manual mode */ 2040 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f; 2041 2042 if (has_old_autopwm(data)) { 2043 int i; 2044 2045 for (i = 0; i < 5 ; i++) 2046 data->auto_temp[nr][i] = it87_read_value(data, 2047 IT87_REG_AUTO_TEMP(nr, i)); 2048 for (i = 0; i < 3 ; i++) 2049 data->auto_pwm[nr][i] = it87_read_value(data, 2050 IT87_REG_AUTO_PWM(nr, i)); 2051 } 2052 } 2053 2054 static struct it87_data *it87_update_device(struct device *dev) 2055 { 2056 struct it87_data *data = dev_get_drvdata(dev); 2057 int i; 2058 2059 mutex_lock(&data->update_lock); 2060 2061 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 2062 || !data->valid) { 2063 if (update_vbat) { 2064 /* Cleared after each update, so reenable. Value 2065 returned by this read will be previous value */ 2066 it87_write_value(data, IT87_REG_CONFIG, 2067 it87_read_value(data, IT87_REG_CONFIG) | 0x40); 2068 } 2069 for (i = 0; i <= 7; i++) { 2070 data->in[i] = 2071 it87_read_value(data, IT87_REG_VIN(i)); 2072 data->in_min[i] = 2073 it87_read_value(data, IT87_REG_VIN_MIN(i)); 2074 data->in_max[i] = 2075 it87_read_value(data, IT87_REG_VIN_MAX(i)); 2076 } 2077 /* in8 (battery) has no limit registers */ 2078 data->in[8] = it87_read_value(data, IT87_REG_VIN(8)); 2079 2080 for (i = 0; i < 5; i++) { 2081 /* Skip disabled fans */ 2082 if (!(data->has_fan & (1 << i))) 2083 continue; 2084 2085 data->fan_min[i] = 2086 it87_read_value(data, IT87_REG_FAN_MIN[i]); 2087 data->fan[i] = it87_read_value(data, 2088 IT87_REG_FAN[i]); 2089 /* Add high byte if in 16-bit mode */ 2090 if (has_16bit_fans(data)) { 2091 data->fan[i] |= it87_read_value(data, 2092 IT87_REG_FANX[i]) << 8; 2093 data->fan_min[i] |= it87_read_value(data, 2094 IT87_REG_FANX_MIN[i]) << 8; 2095 } 2096 } 2097 for (i = 0; i < 3; i++) { 2098 data->temp[i] = 2099 it87_read_value(data, IT87_REG_TEMP(i)); 2100 data->temp_high[i] = 2101 it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 2102 data->temp_low[i] = 2103 it87_read_value(data, IT87_REG_TEMP_LOW(i)); 2104 } 2105 2106 /* Newer chips don't have clock dividers */ 2107 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) { 2108 i = it87_read_value(data, IT87_REG_FAN_DIV); 2109 data->fan_div[0] = i & 0x07; 2110 data->fan_div[1] = (i >> 3) & 0x07; 2111 data->fan_div[2] = (i & 0x40) ? 3 : 1; 2112 } 2113 2114 data->alarms = 2115 it87_read_value(data, IT87_REG_ALARM1) | 2116 (it87_read_value(data, IT87_REG_ALARM2) << 8) | 2117 (it87_read_value(data, IT87_REG_ALARM3) << 16); 2118 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE); 2119 2120 data->fan_main_ctrl = it87_read_value(data, 2121 IT87_REG_FAN_MAIN_CTRL); 2122 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL); 2123 for (i = 0; i < 3; i++) 2124 it87_update_pwm_ctrl(data, i); 2125 2126 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE); 2127 /* The 8705 does not have VID capability. 2128 The 8718 and later don't use IT87_REG_VID for the 2129 same purpose. */ 2130 if (data->type == it8712 || data->type == it8716) { 2131 data->vid = it87_read_value(data, IT87_REG_VID); 2132 /* The older IT8712F revisions had only 5 VID pins, 2133 but we assume it is always safe to read 6 bits. */ 2134 data->vid &= 0x3f; 2135 } 2136 data->last_updated = jiffies; 2137 data->valid = 1; 2138 } 2139 2140 mutex_unlock(&data->update_lock); 2141 2142 return data; 2143 } 2144 2145 static int __init it87_device_add(unsigned short address, 2146 const struct it87_sio_data *sio_data) 2147 { 2148 struct resource res = { 2149 .start = address + IT87_EC_OFFSET, 2150 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1, 2151 .name = DRVNAME, 2152 .flags = IORESOURCE_IO, 2153 }; 2154 int err; 2155 2156 err = acpi_check_resource_conflict(&res); 2157 if (err) 2158 goto exit; 2159 2160 pdev = platform_device_alloc(DRVNAME, address); 2161 if (!pdev) { 2162 err = -ENOMEM; 2163 printk(KERN_ERR DRVNAME ": Device allocation failed\n"); 2164 goto exit; 2165 } 2166 2167 err = platform_device_add_resources(pdev, &res, 1); 2168 if (err) { 2169 printk(KERN_ERR DRVNAME ": Device resource addition failed " 2170 "(%d)\n", err); 2171 goto exit_device_put; 2172 } 2173 2174 err = platform_device_add_data(pdev, sio_data, 2175 sizeof(struct it87_sio_data)); 2176 if (err) { 2177 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n"); 2178 goto exit_device_put; 2179 } 2180 2181 err = platform_device_add(pdev); 2182 if (err) { 2183 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", 2184 err); 2185 goto exit_device_put; 2186 } 2187 2188 return 0; 2189 2190 exit_device_put: 2191 platform_device_put(pdev); 2192 exit: 2193 return err; 2194 } 2195 2196 static int __init sm_it87_init(void) 2197 { 2198 int err; 2199 unsigned short isa_address = 0; 2200 struct it87_sio_data sio_data; 2201 2202 memset(&sio_data, 0, sizeof(struct it87_sio_data)); 2203 err = it87_find(&isa_address, &sio_data); 2204 if (err) 2205 return err; 2206 err = platform_driver_register(&it87_driver); 2207 if (err) 2208 return err; 2209 2210 err = it87_device_add(isa_address, &sio_data); 2211 if (err) { 2212 platform_driver_unregister(&it87_driver); 2213 return err; 2214 } 2215 2216 return 0; 2217 } 2218 2219 static void __exit sm_it87_exit(void) 2220 { 2221 platform_device_unregister(pdev); 2222 platform_driver_unregister(&it87_driver); 2223 } 2224 2225 2226 MODULE_AUTHOR("Chris Gauthron, " 2227 "Jean Delvare <khali@linux-fr.org>"); 2228 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver"); 2229 module_param(update_vbat, bool, 0); 2230 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); 2231 module_param(fix_pwm_polarity, bool, 0); 2232 MODULE_PARM_DESC(fix_pwm_polarity, 2233 "Force PWM polarity to active high (DANGEROUS)"); 2234 MODULE_LICENSE("GPL"); 2235 2236 module_init(sm_it87_init); 2237 module_exit(sm_it87_exit); 2238