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 * IT8728F Super I/O chip w/LPC interface 21 * IT8758E Super I/O chip w/LPC interface 22 * IT8782F Super I/O chip w/LPC interface 23 * IT8783E/F Super I/O chip w/LPC interface 24 * Sis950 A clone of the IT8705F 25 * 26 * Copyright (C) 2001 Chris Gauthron 27 * Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org> 28 * 29 * This program is free software; you can redistribute it and/or modify 30 * it under the terms of the GNU General Public License as published by 31 * the Free Software Foundation; either version 2 of the License, or 32 * (at your option) any later version. 33 * 34 * This program is distributed in the hope that it will be useful, 35 * but WITHOUT ANY WARRANTY; without even the implied warranty of 36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 37 * GNU General Public License for more details. 38 * 39 * You should have received a copy of the GNU General Public License 40 * along with this program; if not, write to the Free Software 41 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 42 */ 43 44 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 45 46 #include <linux/module.h> 47 #include <linux/init.h> 48 #include <linux/slab.h> 49 #include <linux/jiffies.h> 50 #include <linux/platform_device.h> 51 #include <linux/hwmon.h> 52 #include <linux/hwmon-sysfs.h> 53 #include <linux/hwmon-vid.h> 54 #include <linux/err.h> 55 #include <linux/mutex.h> 56 #include <linux/sysfs.h> 57 #include <linux/string.h> 58 #include <linux/dmi.h> 59 #include <linux/acpi.h> 60 #include <linux/io.h> 61 62 #define DRVNAME "it87" 63 64 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8782, 65 it8783 }; 66 67 static unsigned short force_id; 68 module_param(force_id, ushort, 0); 69 MODULE_PARM_DESC(force_id, "Override the detected device ID"); 70 71 static struct platform_device *pdev; 72 73 #define REG 0x2e /* The register to read/write */ 74 #define DEV 0x07 /* Register: Logical device select */ 75 #define VAL 0x2f /* The value to read/write */ 76 #define PME 0x04 /* The device with the fan registers in it */ 77 78 /* The device with the IT8718F/IT8720F VID value in it */ 79 #define GPIO 0x07 80 81 #define DEVID 0x20 /* Register: Device ID */ 82 #define DEVREV 0x22 /* Register: Device Revision */ 83 84 static inline int superio_inb(int reg) 85 { 86 outb(reg, REG); 87 return inb(VAL); 88 } 89 90 static inline void superio_outb(int reg, int val) 91 { 92 outb(reg, REG); 93 outb(val, VAL); 94 } 95 96 static int superio_inw(int reg) 97 { 98 int val; 99 outb(reg++, REG); 100 val = inb(VAL) << 8; 101 outb(reg, REG); 102 val |= inb(VAL); 103 return val; 104 } 105 106 static inline void superio_select(int ldn) 107 { 108 outb(DEV, REG); 109 outb(ldn, VAL); 110 } 111 112 static inline int superio_enter(void) 113 { 114 /* 115 * Try to reserve REG and REG + 1 for exclusive access. 116 */ 117 if (!request_muxed_region(REG, 2, DRVNAME)) 118 return -EBUSY; 119 120 outb(0x87, REG); 121 outb(0x01, REG); 122 outb(0x55, REG); 123 outb(0x55, REG); 124 return 0; 125 } 126 127 static inline void superio_exit(void) 128 { 129 outb(0x02, REG); 130 outb(0x02, VAL); 131 release_region(REG, 2); 132 } 133 134 /* Logical device 4 registers */ 135 #define IT8712F_DEVID 0x8712 136 #define IT8705F_DEVID 0x8705 137 #define IT8716F_DEVID 0x8716 138 #define IT8718F_DEVID 0x8718 139 #define IT8720F_DEVID 0x8720 140 #define IT8721F_DEVID 0x8721 141 #define IT8726F_DEVID 0x8726 142 #define IT8728F_DEVID 0x8728 143 #define IT8782F_DEVID 0x8782 144 #define IT8783E_DEVID 0x8783 145 #define IT87_ACT_REG 0x30 146 #define IT87_BASE_REG 0x60 147 148 /* Logical device 7 registers (IT8712F and later) */ 149 #define IT87_SIO_GPIO1_REG 0x25 150 #define IT87_SIO_GPIO3_REG 0x27 151 #define IT87_SIO_GPIO5_REG 0x29 152 #define IT87_SIO_PINX1_REG 0x2a /* Pin selection */ 153 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */ 154 #define IT87_SIO_SPI_REG 0xef /* SPI function pin select */ 155 #define IT87_SIO_VID_REG 0xfc /* VID value */ 156 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */ 157 158 /* Update battery voltage after every reading if true */ 159 static bool update_vbat; 160 161 /* Not all BIOSes properly configure the PWM registers */ 162 static bool fix_pwm_polarity; 163 164 /* Many IT87 constants specified below */ 165 166 /* Length of ISA address segment */ 167 #define IT87_EXTENT 8 168 169 /* Length of ISA address segment for Environmental Controller */ 170 #define IT87_EC_EXTENT 2 171 172 /* Offset of EC registers from ISA base address */ 173 #define IT87_EC_OFFSET 5 174 175 /* Where are the ISA address/data registers relative to the EC base address */ 176 #define IT87_ADDR_REG_OFFSET 0 177 #define IT87_DATA_REG_OFFSET 1 178 179 /*----- The IT87 registers -----*/ 180 181 #define IT87_REG_CONFIG 0x00 182 183 #define IT87_REG_ALARM1 0x01 184 #define IT87_REG_ALARM2 0x02 185 #define IT87_REG_ALARM3 0x03 186 187 /* 188 * The IT8718F and IT8720F have the VID value in a different register, in 189 * Super-I/O configuration space. 190 */ 191 #define IT87_REG_VID 0x0a 192 /* 193 * The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b 194 * for fan divisors. Later IT8712F revisions must use 16-bit tachometer 195 * mode. 196 */ 197 #define IT87_REG_FAN_DIV 0x0b 198 #define IT87_REG_FAN_16BIT 0x0c 199 200 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */ 201 202 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 }; 203 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 }; 204 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 }; 205 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 }; 206 #define IT87_REG_FAN_MAIN_CTRL 0x13 207 #define IT87_REG_FAN_CTL 0x14 208 #define IT87_REG_PWM(nr) (0x15 + (nr)) 209 #define IT87_REG_PWM_DUTY(nr) (0x63 + (nr) * 8) 210 211 #define IT87_REG_VIN(nr) (0x20 + (nr)) 212 #define IT87_REG_TEMP(nr) (0x29 + (nr)) 213 214 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2) 215 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2) 216 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2) 217 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2) 218 219 #define IT87_REG_VIN_ENABLE 0x50 220 #define IT87_REG_TEMP_ENABLE 0x51 221 #define IT87_REG_TEMP_EXTRA 0x55 222 #define IT87_REG_BEEP_ENABLE 0x5c 223 224 #define IT87_REG_CHIPID 0x58 225 226 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i)) 227 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i)) 228 229 230 struct it87_sio_data { 231 enum chips type; 232 /* Values read from Super-I/O config space */ 233 u8 revision; 234 u8 vid_value; 235 u8 beep_pin; 236 u8 internal; /* Internal sensors can be labeled */ 237 /* Features skipped based on config or DMI */ 238 u16 skip_in; 239 u8 skip_vid; 240 u8 skip_fan; 241 u8 skip_pwm; 242 u8 skip_temp; 243 }; 244 245 /* 246 * For each registered chip, we need to keep some data in memory. 247 * The structure is dynamically allocated. 248 */ 249 struct it87_data { 250 struct device *hwmon_dev; 251 enum chips type; 252 u8 revision; 253 254 unsigned short addr; 255 const char *name; 256 struct mutex update_lock; 257 char valid; /* !=0 if following fields are valid */ 258 unsigned long last_updated; /* In jiffies */ 259 260 u16 in_scaled; /* Internal voltage sensors are scaled */ 261 u8 in[9]; /* Register value */ 262 u8 in_max[8]; /* Register value */ 263 u8 in_min[8]; /* Register value */ 264 u8 has_fan; /* Bitfield, fans enabled */ 265 u16 fan[5]; /* Register values, possibly combined */ 266 u16 fan_min[5]; /* Register values, possibly combined */ 267 u8 has_temp; /* Bitfield, temp sensors enabled */ 268 s8 temp[3]; /* Register value */ 269 s8 temp_high[3]; /* Register value */ 270 s8 temp_low[3]; /* Register value */ 271 u8 sensor; /* Register value */ 272 u8 fan_div[3]; /* Register encoding, shifted right */ 273 u8 vid; /* Register encoding, combined */ 274 u8 vrm; 275 u32 alarms; /* Register encoding, combined */ 276 u8 beeps; /* Register encoding */ 277 u8 fan_main_ctrl; /* Register value */ 278 u8 fan_ctl; /* Register value */ 279 280 /* 281 * The following 3 arrays correspond to the same registers up to 282 * the IT8720F. The meaning of bits 6-0 depends on the value of bit 283 * 7, and we want to preserve settings on mode changes, so we have 284 * to track all values separately. 285 * Starting with the IT8721F, the manual PWM duty cycles are stored 286 * in separate registers (8-bit values), so the separate tracking 287 * is no longer needed, but it is still done to keep the driver 288 * simple. 289 */ 290 u8 pwm_ctrl[3]; /* Register value */ 291 u8 pwm_duty[3]; /* Manual PWM value set by user */ 292 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */ 293 294 /* Automatic fan speed control registers */ 295 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */ 296 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */ 297 }; 298 299 static inline int has_12mv_adc(const struct it87_data *data) 300 { 301 /* 302 * IT8721F and later have a 12 mV ADC, also with internal scaling 303 * on selected inputs. 304 */ 305 return data->type == it8721 306 || data->type == it8728; 307 } 308 309 static inline int has_newer_autopwm(const struct it87_data *data) 310 { 311 /* 312 * IT8721F and later have separate registers for the temperature 313 * mapping and the manual duty cycle. 314 */ 315 return data->type == it8721 316 || data->type == it8728; 317 } 318 319 static int adc_lsb(const struct it87_data *data, int nr) 320 { 321 int lsb = has_12mv_adc(data) ? 12 : 16; 322 if (data->in_scaled & (1 << nr)) 323 lsb <<= 1; 324 return lsb; 325 } 326 327 static u8 in_to_reg(const struct it87_data *data, int nr, long val) 328 { 329 val = DIV_ROUND_CLOSEST(val, adc_lsb(data, nr)); 330 return SENSORS_LIMIT(val, 0, 255); 331 } 332 333 static int in_from_reg(const struct it87_data *data, int nr, int val) 334 { 335 return val * adc_lsb(data, nr); 336 } 337 338 static inline u8 FAN_TO_REG(long rpm, int div) 339 { 340 if (rpm == 0) 341 return 255; 342 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 343 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 344 254); 345 } 346 347 static inline u16 FAN16_TO_REG(long rpm) 348 { 349 if (rpm == 0) 350 return 0xffff; 351 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe); 352 } 353 354 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \ 355 1350000 / ((val) * (div))) 356 /* The divider is fixed to 2 in 16-bit mode */ 357 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \ 358 1350000 / ((val) * 2)) 359 360 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \ 361 ((val) + 500) / 1000), -128, 127)) 362 #define TEMP_FROM_REG(val) ((val) * 1000) 363 364 static u8 pwm_to_reg(const struct it87_data *data, long val) 365 { 366 if (has_newer_autopwm(data)) 367 return val; 368 else 369 return val >> 1; 370 } 371 372 static int pwm_from_reg(const struct it87_data *data, u8 reg) 373 { 374 if (has_newer_autopwm(data)) 375 return reg; 376 else 377 return (reg & 0x7f) << 1; 378 } 379 380 381 static int DIV_TO_REG(int val) 382 { 383 int answer = 0; 384 while (answer < 7 && (val >>= 1)) 385 answer++; 386 return answer; 387 } 388 #define DIV_FROM_REG(val) (1 << (val)) 389 390 static const unsigned int pwm_freq[8] = { 391 48000000 / 128, 392 24000000 / 128, 393 12000000 / 128, 394 8000000 / 128, 395 6000000 / 128, 396 3000000 / 128, 397 1500000 / 128, 398 750000 / 128, 399 }; 400 401 static inline int has_16bit_fans(const struct it87_data *data) 402 { 403 /* 404 * IT8705F Datasheet 0.4.1, 3h == Version G. 405 * IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J. 406 * These are the first revisions with 16-bit tachometer support. 407 */ 408 return (data->type == it87 && data->revision >= 0x03) 409 || (data->type == it8712 && data->revision >= 0x08) 410 || data->type == it8716 411 || data->type == it8718 412 || data->type == it8720 413 || data->type == it8721 414 || data->type == it8728 415 || data->type == it8782 416 || data->type == it8783; 417 } 418 419 static inline int has_old_autopwm(const struct it87_data *data) 420 { 421 /* 422 * The old automatic fan speed control interface is implemented 423 * by IT8705F chips up to revision F and IT8712F chips up to 424 * revision G. 425 */ 426 return (data->type == it87 && data->revision < 0x03) 427 || (data->type == it8712 && data->revision < 0x08); 428 } 429 430 static int it87_probe(struct platform_device *pdev); 431 static int it87_remove(struct platform_device *pdev); 432 433 static int it87_read_value(struct it87_data *data, u8 reg); 434 static void it87_write_value(struct it87_data *data, u8 reg, u8 value); 435 static struct it87_data *it87_update_device(struct device *dev); 436 static int it87_check_pwm(struct device *dev); 437 static void it87_init_device(struct platform_device *pdev); 438 439 440 static struct platform_driver it87_driver = { 441 .driver = { 442 .owner = THIS_MODULE, 443 .name = DRVNAME, 444 }, 445 .probe = it87_probe, 446 .remove = it87_remove, 447 }; 448 449 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 450 char *buf) 451 { 452 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 453 int nr = sensor_attr->index; 454 455 struct it87_data *data = it87_update_device(dev); 456 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr])); 457 } 458 459 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 460 char *buf) 461 { 462 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 463 int nr = sensor_attr->index; 464 465 struct it87_data *data = it87_update_device(dev); 466 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_min[nr])); 467 } 468 469 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 470 char *buf) 471 { 472 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 473 int nr = sensor_attr->index; 474 475 struct it87_data *data = it87_update_device(dev); 476 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_max[nr])); 477 } 478 479 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 480 const char *buf, size_t count) 481 { 482 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 483 int nr = sensor_attr->index; 484 485 struct it87_data *data = dev_get_drvdata(dev); 486 unsigned long val; 487 488 if (kstrtoul(buf, 10, &val) < 0) 489 return -EINVAL; 490 491 mutex_lock(&data->update_lock); 492 data->in_min[nr] = in_to_reg(data, nr, val); 493 it87_write_value(data, IT87_REG_VIN_MIN(nr), 494 data->in_min[nr]); 495 mutex_unlock(&data->update_lock); 496 return count; 497 } 498 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 499 const char *buf, size_t count) 500 { 501 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 502 int nr = sensor_attr->index; 503 504 struct it87_data *data = dev_get_drvdata(dev); 505 unsigned long val; 506 507 if (kstrtoul(buf, 10, &val) < 0) 508 return -EINVAL; 509 510 mutex_lock(&data->update_lock); 511 data->in_max[nr] = in_to_reg(data, nr, val); 512 it87_write_value(data, IT87_REG_VIN_MAX(nr), 513 data->in_max[nr]); 514 mutex_unlock(&data->update_lock); 515 return count; 516 } 517 518 #define show_in_offset(offset) \ 519 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 520 show_in, NULL, offset); 521 522 #define limit_in_offset(offset) \ 523 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 524 show_in_min, set_in_min, offset); \ 525 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 526 show_in_max, set_in_max, offset); 527 528 show_in_offset(0); 529 limit_in_offset(0); 530 show_in_offset(1); 531 limit_in_offset(1); 532 show_in_offset(2); 533 limit_in_offset(2); 534 show_in_offset(3); 535 limit_in_offset(3); 536 show_in_offset(4); 537 limit_in_offset(4); 538 show_in_offset(5); 539 limit_in_offset(5); 540 show_in_offset(6); 541 limit_in_offset(6); 542 show_in_offset(7); 543 limit_in_offset(7); 544 show_in_offset(8); 545 546 /* 3 temperatures */ 547 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 548 char *buf) 549 { 550 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 551 int nr = sensor_attr->index; 552 553 struct it87_data *data = it87_update_device(dev); 554 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 555 } 556 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 557 char *buf) 558 { 559 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 560 int nr = sensor_attr->index; 561 562 struct it87_data *data = it87_update_device(dev); 563 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); 564 } 565 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 566 char *buf) 567 { 568 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 569 int nr = sensor_attr->index; 570 571 struct it87_data *data = it87_update_device(dev); 572 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); 573 } 574 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 575 const char *buf, size_t count) 576 { 577 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 578 int nr = sensor_attr->index; 579 580 struct it87_data *data = dev_get_drvdata(dev); 581 long val; 582 583 if (kstrtol(buf, 10, &val) < 0) 584 return -EINVAL; 585 586 mutex_lock(&data->update_lock); 587 data->temp_high[nr] = TEMP_TO_REG(val); 588 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); 589 mutex_unlock(&data->update_lock); 590 return count; 591 } 592 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 593 const char *buf, size_t count) 594 { 595 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 596 int nr = sensor_attr->index; 597 598 struct it87_data *data = dev_get_drvdata(dev); 599 long val; 600 601 if (kstrtol(buf, 10, &val) < 0) 602 return -EINVAL; 603 604 mutex_lock(&data->update_lock); 605 data->temp_low[nr] = TEMP_TO_REG(val); 606 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); 607 mutex_unlock(&data->update_lock); 608 return count; 609 } 610 #define show_temp_offset(offset) \ 611 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 612 show_temp, NULL, offset - 1); \ 613 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 614 show_temp_max, set_temp_max, offset - 1); \ 615 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 616 show_temp_min, set_temp_min, offset - 1); 617 618 show_temp_offset(1); 619 show_temp_offset(2); 620 show_temp_offset(3); 621 622 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, 623 char *buf) 624 { 625 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 626 int nr = sensor_attr->index; 627 struct it87_data *data = it87_update_device(dev); 628 u8 reg = data->sensor; /* In case value is updated while used */ 629 630 if (reg & (1 << nr)) 631 return sprintf(buf, "3\n"); /* thermal diode */ 632 if (reg & (8 << nr)) 633 return sprintf(buf, "4\n"); /* thermistor */ 634 return sprintf(buf, "0\n"); /* disabled */ 635 } 636 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, 637 const char *buf, size_t count) 638 { 639 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 640 int nr = sensor_attr->index; 641 642 struct it87_data *data = dev_get_drvdata(dev); 643 long val; 644 u8 reg; 645 646 if (kstrtol(buf, 10, &val) < 0) 647 return -EINVAL; 648 649 reg = it87_read_value(data, IT87_REG_TEMP_ENABLE); 650 reg &= ~(1 << nr); 651 reg &= ~(8 << nr); 652 if (val == 2) { /* backwards compatibility */ 653 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 " 654 "instead\n"); 655 val = 4; 656 } 657 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */ 658 if (val == 3) 659 reg |= 1 << nr; 660 else if (val == 4) 661 reg |= 8 << nr; 662 else if (val != 0) 663 return -EINVAL; 664 665 mutex_lock(&data->update_lock); 666 data->sensor = reg; 667 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor); 668 data->valid = 0; /* Force cache refresh */ 669 mutex_unlock(&data->update_lock); 670 return count; 671 } 672 #define show_sensor_offset(offset) \ 673 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ 674 show_sensor, set_sensor, offset - 1); 675 676 show_sensor_offset(1); 677 show_sensor_offset(2); 678 show_sensor_offset(3); 679 680 /* 3 Fans */ 681 682 static int pwm_mode(const struct it87_data *data, int nr) 683 { 684 int ctrl = data->fan_main_ctrl & (1 << nr); 685 686 if (ctrl == 0) /* Full speed */ 687 return 0; 688 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */ 689 return 2; 690 else /* Manual mode */ 691 return 1; 692 } 693 694 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 695 char *buf) 696 { 697 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 698 int nr = sensor_attr->index; 699 700 struct it87_data *data = it87_update_device(dev); 701 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 702 DIV_FROM_REG(data->fan_div[nr]))); 703 } 704 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 705 char *buf) 706 { 707 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 708 int nr = sensor_attr->index; 709 710 struct it87_data *data = it87_update_device(dev); 711 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 712 DIV_FROM_REG(data->fan_div[nr]))); 713 } 714 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 715 char *buf) 716 { 717 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 718 int nr = sensor_attr->index; 719 720 struct it87_data *data = it87_update_device(dev); 721 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 722 } 723 static ssize_t show_pwm_enable(struct device *dev, 724 struct device_attribute *attr, char *buf) 725 { 726 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 727 int nr = sensor_attr->index; 728 729 struct it87_data *data = it87_update_device(dev); 730 return sprintf(buf, "%d\n", pwm_mode(data, nr)); 731 } 732 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 733 char *buf) 734 { 735 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 736 int nr = sensor_attr->index; 737 738 struct it87_data *data = it87_update_device(dev); 739 return sprintf(buf, "%d\n", 740 pwm_from_reg(data, data->pwm_duty[nr])); 741 } 742 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr, 743 char *buf) 744 { 745 struct it87_data *data = it87_update_device(dev); 746 int index = (data->fan_ctl >> 4) & 0x07; 747 748 return sprintf(buf, "%u\n", pwm_freq[index]); 749 } 750 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 751 const char *buf, size_t count) 752 { 753 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 754 int nr = sensor_attr->index; 755 756 struct it87_data *data = dev_get_drvdata(dev); 757 long val; 758 u8 reg; 759 760 if (kstrtol(buf, 10, &val) < 0) 761 return -EINVAL; 762 763 mutex_lock(&data->update_lock); 764 reg = it87_read_value(data, IT87_REG_FAN_DIV); 765 switch (nr) { 766 case 0: 767 data->fan_div[nr] = reg & 0x07; 768 break; 769 case 1: 770 data->fan_div[nr] = (reg >> 3) & 0x07; 771 break; 772 case 2: 773 data->fan_div[nr] = (reg & 0x40) ? 3 : 1; 774 break; 775 } 776 777 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 778 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 779 mutex_unlock(&data->update_lock); 780 return count; 781 } 782 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 783 const char *buf, size_t count) 784 { 785 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 786 int nr = sensor_attr->index; 787 788 struct it87_data *data = dev_get_drvdata(dev); 789 unsigned long val; 790 int min; 791 u8 old; 792 793 if (kstrtoul(buf, 10, &val) < 0) 794 return -EINVAL; 795 796 mutex_lock(&data->update_lock); 797 old = it87_read_value(data, IT87_REG_FAN_DIV); 798 799 /* Save fan min limit */ 800 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 801 802 switch (nr) { 803 case 0: 804 case 1: 805 data->fan_div[nr] = DIV_TO_REG(val); 806 break; 807 case 2: 808 if (val < 8) 809 data->fan_div[nr] = 1; 810 else 811 data->fan_div[nr] = 3; 812 } 813 val = old & 0x80; 814 val |= (data->fan_div[0] & 0x07); 815 val |= (data->fan_div[1] & 0x07) << 3; 816 if (data->fan_div[2] == 3) 817 val |= 0x1 << 6; 818 it87_write_value(data, IT87_REG_FAN_DIV, val); 819 820 /* Restore fan min limit */ 821 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 822 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 823 824 mutex_unlock(&data->update_lock); 825 return count; 826 } 827 828 /* Returns 0 if OK, -EINVAL otherwise */ 829 static int check_trip_points(struct device *dev, int nr) 830 { 831 const struct it87_data *data = dev_get_drvdata(dev); 832 int i, err = 0; 833 834 if (has_old_autopwm(data)) { 835 for (i = 0; i < 3; i++) { 836 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1]) 837 err = -EINVAL; 838 } 839 for (i = 0; i < 2; i++) { 840 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1]) 841 err = -EINVAL; 842 } 843 } 844 845 if (err) { 846 dev_err(dev, "Inconsistent trip points, not switching to " 847 "automatic mode\n"); 848 dev_err(dev, "Adjust the trip points and try again\n"); 849 } 850 return err; 851 } 852 853 static ssize_t set_pwm_enable(struct device *dev, 854 struct device_attribute *attr, const char *buf, size_t count) 855 { 856 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 857 int nr = sensor_attr->index; 858 859 struct it87_data *data = dev_get_drvdata(dev); 860 long val; 861 862 if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2) 863 return -EINVAL; 864 865 /* Check trip points before switching to automatic mode */ 866 if (val == 2) { 867 if (check_trip_points(dev, nr) < 0) 868 return -EINVAL; 869 } 870 871 mutex_lock(&data->update_lock); 872 873 if (val == 0) { 874 int tmp; 875 /* make sure the fan is on when in on/off mode */ 876 tmp = it87_read_value(data, IT87_REG_FAN_CTL); 877 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr)); 878 /* set on/off mode */ 879 data->fan_main_ctrl &= ~(1 << nr); 880 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 881 data->fan_main_ctrl); 882 } else { 883 if (val == 1) /* Manual mode */ 884 data->pwm_ctrl[nr] = has_newer_autopwm(data) ? 885 data->pwm_temp_map[nr] : 886 data->pwm_duty[nr]; 887 else /* Automatic mode */ 888 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 889 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 890 /* set SmartGuardian mode */ 891 data->fan_main_ctrl |= (1 << nr); 892 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 893 data->fan_main_ctrl); 894 } 895 896 mutex_unlock(&data->update_lock); 897 return count; 898 } 899 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 900 const char *buf, size_t count) 901 { 902 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 903 int nr = sensor_attr->index; 904 905 struct it87_data *data = dev_get_drvdata(dev); 906 long val; 907 908 if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255) 909 return -EINVAL; 910 911 mutex_lock(&data->update_lock); 912 if (has_newer_autopwm(data)) { 913 /* 914 * If we are in automatic mode, the PWM duty cycle register 915 * is read-only so we can't write the value. 916 */ 917 if (data->pwm_ctrl[nr] & 0x80) { 918 mutex_unlock(&data->update_lock); 919 return -EBUSY; 920 } 921 data->pwm_duty[nr] = pwm_to_reg(data, val); 922 it87_write_value(data, IT87_REG_PWM_DUTY(nr), 923 data->pwm_duty[nr]); 924 } else { 925 data->pwm_duty[nr] = pwm_to_reg(data, val); 926 /* 927 * If we are in manual mode, write the duty cycle immediately; 928 * otherwise, just store it for later use. 929 */ 930 if (!(data->pwm_ctrl[nr] & 0x80)) { 931 data->pwm_ctrl[nr] = data->pwm_duty[nr]; 932 it87_write_value(data, IT87_REG_PWM(nr), 933 data->pwm_ctrl[nr]); 934 } 935 } 936 mutex_unlock(&data->update_lock); 937 return count; 938 } 939 static ssize_t set_pwm_freq(struct device *dev, 940 struct device_attribute *attr, const char *buf, size_t count) 941 { 942 struct it87_data *data = dev_get_drvdata(dev); 943 unsigned long val; 944 int i; 945 946 if (kstrtoul(buf, 10, &val) < 0) 947 return -EINVAL; 948 949 /* Search for the nearest available frequency */ 950 for (i = 0; i < 7; i++) { 951 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2) 952 break; 953 } 954 955 mutex_lock(&data->update_lock); 956 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f; 957 data->fan_ctl |= i << 4; 958 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl); 959 mutex_unlock(&data->update_lock); 960 961 return count; 962 } 963 static ssize_t show_pwm_temp_map(struct device *dev, 964 struct device_attribute *attr, char *buf) 965 { 966 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 967 int nr = sensor_attr->index; 968 969 struct it87_data *data = it87_update_device(dev); 970 int map; 971 972 if (data->pwm_temp_map[nr] < 3) 973 map = 1 << data->pwm_temp_map[nr]; 974 else 975 map = 0; /* Should never happen */ 976 return sprintf(buf, "%d\n", map); 977 } 978 static ssize_t set_pwm_temp_map(struct device *dev, 979 struct device_attribute *attr, const char *buf, size_t count) 980 { 981 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 982 int nr = sensor_attr->index; 983 984 struct it87_data *data = dev_get_drvdata(dev); 985 long val; 986 u8 reg; 987 988 /* 989 * This check can go away if we ever support automatic fan speed 990 * control on newer chips. 991 */ 992 if (!has_old_autopwm(data)) { 993 dev_notice(dev, "Mapping change disabled for safety reasons\n"); 994 return -EINVAL; 995 } 996 997 if (kstrtol(buf, 10, &val) < 0) 998 return -EINVAL; 999 1000 switch (val) { 1001 case (1 << 0): 1002 reg = 0x00; 1003 break; 1004 case (1 << 1): 1005 reg = 0x01; 1006 break; 1007 case (1 << 2): 1008 reg = 0x02; 1009 break; 1010 default: 1011 return -EINVAL; 1012 } 1013 1014 mutex_lock(&data->update_lock); 1015 data->pwm_temp_map[nr] = reg; 1016 /* 1017 * If we are in automatic mode, write the temp mapping immediately; 1018 * otherwise, just store it for later use. 1019 */ 1020 if (data->pwm_ctrl[nr] & 0x80) { 1021 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 1022 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 1023 } 1024 mutex_unlock(&data->update_lock); 1025 return count; 1026 } 1027 1028 static ssize_t show_auto_pwm(struct device *dev, 1029 struct device_attribute *attr, char *buf) 1030 { 1031 struct it87_data *data = it87_update_device(dev); 1032 struct sensor_device_attribute_2 *sensor_attr = 1033 to_sensor_dev_attr_2(attr); 1034 int nr = sensor_attr->nr; 1035 int point = sensor_attr->index; 1036 1037 return sprintf(buf, "%d\n", 1038 pwm_from_reg(data, data->auto_pwm[nr][point])); 1039 } 1040 1041 static ssize_t set_auto_pwm(struct device *dev, 1042 struct device_attribute *attr, const char *buf, size_t count) 1043 { 1044 struct it87_data *data = dev_get_drvdata(dev); 1045 struct sensor_device_attribute_2 *sensor_attr = 1046 to_sensor_dev_attr_2(attr); 1047 int nr = sensor_attr->nr; 1048 int point = sensor_attr->index; 1049 long val; 1050 1051 if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255) 1052 return -EINVAL; 1053 1054 mutex_lock(&data->update_lock); 1055 data->auto_pwm[nr][point] = pwm_to_reg(data, val); 1056 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point), 1057 data->auto_pwm[nr][point]); 1058 mutex_unlock(&data->update_lock); 1059 return count; 1060 } 1061 1062 static ssize_t show_auto_temp(struct device *dev, 1063 struct device_attribute *attr, char *buf) 1064 { 1065 struct it87_data *data = it87_update_device(dev); 1066 struct sensor_device_attribute_2 *sensor_attr = 1067 to_sensor_dev_attr_2(attr); 1068 int nr = sensor_attr->nr; 1069 int point = sensor_attr->index; 1070 1071 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point])); 1072 } 1073 1074 static ssize_t set_auto_temp(struct device *dev, 1075 struct device_attribute *attr, const char *buf, size_t count) 1076 { 1077 struct it87_data *data = dev_get_drvdata(dev); 1078 struct sensor_device_attribute_2 *sensor_attr = 1079 to_sensor_dev_attr_2(attr); 1080 int nr = sensor_attr->nr; 1081 int point = sensor_attr->index; 1082 long val; 1083 1084 if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000) 1085 return -EINVAL; 1086 1087 mutex_lock(&data->update_lock); 1088 data->auto_temp[nr][point] = TEMP_TO_REG(val); 1089 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point), 1090 data->auto_temp[nr][point]); 1091 mutex_unlock(&data->update_lock); 1092 return count; 1093 } 1094 1095 #define show_fan_offset(offset) \ 1096 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 1097 show_fan, NULL, offset - 1); \ 1098 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 1099 show_fan_min, set_fan_min, offset - 1); \ 1100 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 1101 show_fan_div, set_fan_div, offset - 1); 1102 1103 show_fan_offset(1); 1104 show_fan_offset(2); 1105 show_fan_offset(3); 1106 1107 #define show_pwm_offset(offset) \ 1108 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 1109 show_pwm_enable, set_pwm_enable, offset - 1); \ 1110 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 1111 show_pwm, set_pwm, offset - 1); \ 1112 static DEVICE_ATTR(pwm##offset##_freq, \ 1113 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \ 1114 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \ 1115 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \ 1116 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \ 1117 offset - 1); \ 1118 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \ 1119 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1120 offset - 1, 0); \ 1121 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \ 1122 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1123 offset - 1, 1); \ 1124 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \ 1125 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1126 offset - 1, 2); \ 1127 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \ 1128 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \ 1129 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \ 1130 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1131 offset - 1, 1); \ 1132 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \ 1133 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1134 offset - 1, 0); \ 1135 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \ 1136 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1137 offset - 1, 2); \ 1138 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \ 1139 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1140 offset - 1, 3); \ 1141 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \ 1142 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1143 offset - 1, 4); 1144 1145 show_pwm_offset(1); 1146 show_pwm_offset(2); 1147 show_pwm_offset(3); 1148 1149 /* A different set of callbacks for 16-bit fans */ 1150 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr, 1151 char *buf) 1152 { 1153 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1154 int nr = sensor_attr->index; 1155 struct it87_data *data = it87_update_device(dev); 1156 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr])); 1157 } 1158 1159 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr, 1160 char *buf) 1161 { 1162 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1163 int nr = sensor_attr->index; 1164 struct it87_data *data = it87_update_device(dev); 1165 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr])); 1166 } 1167 1168 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr, 1169 const char *buf, size_t count) 1170 { 1171 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1172 int nr = sensor_attr->index; 1173 struct it87_data *data = dev_get_drvdata(dev); 1174 long val; 1175 1176 if (kstrtol(buf, 10, &val) < 0) 1177 return -EINVAL; 1178 1179 mutex_lock(&data->update_lock); 1180 data->fan_min[nr] = FAN16_TO_REG(val); 1181 it87_write_value(data, IT87_REG_FAN_MIN[nr], 1182 data->fan_min[nr] & 0xff); 1183 it87_write_value(data, IT87_REG_FANX_MIN[nr], 1184 data->fan_min[nr] >> 8); 1185 mutex_unlock(&data->update_lock); 1186 return count; 1187 } 1188 1189 /* 1190 * We want to use the same sysfs file names as 8-bit fans, but we need 1191 * different variable names, so we have to use SENSOR_ATTR instead of 1192 * SENSOR_DEVICE_ATTR. 1193 */ 1194 #define show_fan16_offset(offset) \ 1195 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \ 1196 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \ 1197 show_fan16, NULL, offset - 1); \ 1198 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \ 1199 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 1200 show_fan16_min, set_fan16_min, offset - 1) 1201 1202 show_fan16_offset(1); 1203 show_fan16_offset(2); 1204 show_fan16_offset(3); 1205 show_fan16_offset(4); 1206 show_fan16_offset(5); 1207 1208 /* Alarms */ 1209 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 1210 char *buf) 1211 { 1212 struct it87_data *data = it87_update_device(dev); 1213 return sprintf(buf, "%u\n", data->alarms); 1214 } 1215 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 1216 1217 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 1218 char *buf) 1219 { 1220 int bitnr = to_sensor_dev_attr(attr)->index; 1221 struct it87_data *data = it87_update_device(dev); 1222 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 1223 } 1224 1225 static ssize_t clear_intrusion(struct device *dev, struct device_attribute 1226 *attr, const char *buf, size_t count) 1227 { 1228 struct it87_data *data = dev_get_drvdata(dev); 1229 long val; 1230 int config; 1231 1232 if (kstrtol(buf, 10, &val) < 0 || val != 0) 1233 return -EINVAL; 1234 1235 mutex_lock(&data->update_lock); 1236 config = it87_read_value(data, IT87_REG_CONFIG); 1237 if (config < 0) { 1238 count = config; 1239 } else { 1240 config |= 1 << 5; 1241 it87_write_value(data, IT87_REG_CONFIG, config); 1242 /* Invalidate cache to force re-read */ 1243 data->valid = 0; 1244 } 1245 mutex_unlock(&data->update_lock); 1246 1247 return count; 1248 } 1249 1250 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8); 1251 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9); 1252 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10); 1253 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11); 1254 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12); 1255 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13); 1256 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14); 1257 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15); 1258 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0); 1259 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1); 1260 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2); 1261 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3); 1262 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6); 1263 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16); 1264 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17); 1265 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18); 1266 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR, 1267 show_alarm, clear_intrusion, 4); 1268 1269 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 1270 char *buf) 1271 { 1272 int bitnr = to_sensor_dev_attr(attr)->index; 1273 struct it87_data *data = it87_update_device(dev); 1274 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1); 1275 } 1276 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 1277 const char *buf, size_t count) 1278 { 1279 int bitnr = to_sensor_dev_attr(attr)->index; 1280 struct it87_data *data = dev_get_drvdata(dev); 1281 long val; 1282 1283 if (kstrtol(buf, 10, &val) < 0 1284 || (val != 0 && val != 1)) 1285 return -EINVAL; 1286 1287 mutex_lock(&data->update_lock); 1288 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE); 1289 if (val) 1290 data->beeps |= (1 << bitnr); 1291 else 1292 data->beeps &= ~(1 << bitnr); 1293 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps); 1294 mutex_unlock(&data->update_lock); 1295 return count; 1296 } 1297 1298 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, 1299 show_beep, set_beep, 1); 1300 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1); 1301 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1); 1302 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1); 1303 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1); 1304 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1); 1305 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1); 1306 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1); 1307 /* fanX_beep writability is set later */ 1308 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0); 1309 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0); 1310 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0); 1311 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0); 1312 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0); 1313 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, 1314 show_beep, set_beep, 2); 1315 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2); 1316 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2); 1317 1318 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr, 1319 char *buf) 1320 { 1321 struct it87_data *data = dev_get_drvdata(dev); 1322 return sprintf(buf, "%u\n", data->vrm); 1323 } 1324 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr, 1325 const char *buf, size_t count) 1326 { 1327 struct it87_data *data = dev_get_drvdata(dev); 1328 unsigned long val; 1329 1330 if (kstrtoul(buf, 10, &val) < 0) 1331 return -EINVAL; 1332 1333 data->vrm = val; 1334 1335 return count; 1336 } 1337 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 1338 1339 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr, 1340 char *buf) 1341 { 1342 struct it87_data *data = it87_update_device(dev); 1343 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 1344 } 1345 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 1346 1347 static ssize_t show_label(struct device *dev, struct device_attribute *attr, 1348 char *buf) 1349 { 1350 static const char * const labels[] = { 1351 "+5V", 1352 "5VSB", 1353 "Vbat", 1354 }; 1355 static const char * const labels_it8721[] = { 1356 "+3.3V", 1357 "3VSB", 1358 "Vbat", 1359 }; 1360 struct it87_data *data = dev_get_drvdata(dev); 1361 int nr = to_sensor_dev_attr(attr)->index; 1362 1363 return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr] 1364 : labels[nr]); 1365 } 1366 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0); 1367 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1); 1368 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2); 1369 1370 static ssize_t show_name(struct device *dev, struct device_attribute 1371 *devattr, char *buf) 1372 { 1373 struct it87_data *data = dev_get_drvdata(dev); 1374 return sprintf(buf, "%s\n", data->name); 1375 } 1376 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 1377 1378 static struct attribute *it87_attributes_in[9][5] = { 1379 { 1380 &sensor_dev_attr_in0_input.dev_attr.attr, 1381 &sensor_dev_attr_in0_min.dev_attr.attr, 1382 &sensor_dev_attr_in0_max.dev_attr.attr, 1383 &sensor_dev_attr_in0_alarm.dev_attr.attr, 1384 NULL 1385 }, { 1386 &sensor_dev_attr_in1_input.dev_attr.attr, 1387 &sensor_dev_attr_in1_min.dev_attr.attr, 1388 &sensor_dev_attr_in1_max.dev_attr.attr, 1389 &sensor_dev_attr_in1_alarm.dev_attr.attr, 1390 NULL 1391 }, { 1392 &sensor_dev_attr_in2_input.dev_attr.attr, 1393 &sensor_dev_attr_in2_min.dev_attr.attr, 1394 &sensor_dev_attr_in2_max.dev_attr.attr, 1395 &sensor_dev_attr_in2_alarm.dev_attr.attr, 1396 NULL 1397 }, { 1398 &sensor_dev_attr_in3_input.dev_attr.attr, 1399 &sensor_dev_attr_in3_min.dev_attr.attr, 1400 &sensor_dev_attr_in3_max.dev_attr.attr, 1401 &sensor_dev_attr_in3_alarm.dev_attr.attr, 1402 NULL 1403 }, { 1404 &sensor_dev_attr_in4_input.dev_attr.attr, 1405 &sensor_dev_attr_in4_min.dev_attr.attr, 1406 &sensor_dev_attr_in4_max.dev_attr.attr, 1407 &sensor_dev_attr_in4_alarm.dev_attr.attr, 1408 NULL 1409 }, { 1410 &sensor_dev_attr_in5_input.dev_attr.attr, 1411 &sensor_dev_attr_in5_min.dev_attr.attr, 1412 &sensor_dev_attr_in5_max.dev_attr.attr, 1413 &sensor_dev_attr_in5_alarm.dev_attr.attr, 1414 NULL 1415 }, { 1416 &sensor_dev_attr_in6_input.dev_attr.attr, 1417 &sensor_dev_attr_in6_min.dev_attr.attr, 1418 &sensor_dev_attr_in6_max.dev_attr.attr, 1419 &sensor_dev_attr_in6_alarm.dev_attr.attr, 1420 NULL 1421 }, { 1422 &sensor_dev_attr_in7_input.dev_attr.attr, 1423 &sensor_dev_attr_in7_min.dev_attr.attr, 1424 &sensor_dev_attr_in7_max.dev_attr.attr, 1425 &sensor_dev_attr_in7_alarm.dev_attr.attr, 1426 NULL 1427 }, { 1428 &sensor_dev_attr_in8_input.dev_attr.attr, 1429 NULL 1430 } }; 1431 1432 static const struct attribute_group it87_group_in[9] = { 1433 { .attrs = it87_attributes_in[0] }, 1434 { .attrs = it87_attributes_in[1] }, 1435 { .attrs = it87_attributes_in[2] }, 1436 { .attrs = it87_attributes_in[3] }, 1437 { .attrs = it87_attributes_in[4] }, 1438 { .attrs = it87_attributes_in[5] }, 1439 { .attrs = it87_attributes_in[6] }, 1440 { .attrs = it87_attributes_in[7] }, 1441 { .attrs = it87_attributes_in[8] }, 1442 }; 1443 1444 static struct attribute *it87_attributes_temp[3][6] = { 1445 { 1446 &sensor_dev_attr_temp1_input.dev_attr.attr, 1447 &sensor_dev_attr_temp1_max.dev_attr.attr, 1448 &sensor_dev_attr_temp1_min.dev_attr.attr, 1449 &sensor_dev_attr_temp1_type.dev_attr.attr, 1450 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1451 NULL 1452 } , { 1453 &sensor_dev_attr_temp2_input.dev_attr.attr, 1454 &sensor_dev_attr_temp2_max.dev_attr.attr, 1455 &sensor_dev_attr_temp2_min.dev_attr.attr, 1456 &sensor_dev_attr_temp2_type.dev_attr.attr, 1457 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1458 NULL 1459 } , { 1460 &sensor_dev_attr_temp3_input.dev_attr.attr, 1461 &sensor_dev_attr_temp3_max.dev_attr.attr, 1462 &sensor_dev_attr_temp3_min.dev_attr.attr, 1463 &sensor_dev_attr_temp3_type.dev_attr.attr, 1464 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1465 NULL 1466 } }; 1467 1468 static const struct attribute_group it87_group_temp[3] = { 1469 { .attrs = it87_attributes_temp[0] }, 1470 { .attrs = it87_attributes_temp[1] }, 1471 { .attrs = it87_attributes_temp[2] }, 1472 }; 1473 1474 static struct attribute *it87_attributes[] = { 1475 &dev_attr_alarms.attr, 1476 &sensor_dev_attr_intrusion0_alarm.dev_attr.attr, 1477 &dev_attr_name.attr, 1478 NULL 1479 }; 1480 1481 static const struct attribute_group it87_group = { 1482 .attrs = it87_attributes, 1483 }; 1484 1485 static struct attribute *it87_attributes_in_beep[] = { 1486 &sensor_dev_attr_in0_beep.dev_attr.attr, 1487 &sensor_dev_attr_in1_beep.dev_attr.attr, 1488 &sensor_dev_attr_in2_beep.dev_attr.attr, 1489 &sensor_dev_attr_in3_beep.dev_attr.attr, 1490 &sensor_dev_attr_in4_beep.dev_attr.attr, 1491 &sensor_dev_attr_in5_beep.dev_attr.attr, 1492 &sensor_dev_attr_in6_beep.dev_attr.attr, 1493 &sensor_dev_attr_in7_beep.dev_attr.attr, 1494 NULL 1495 }; 1496 1497 static struct attribute *it87_attributes_temp_beep[] = { 1498 &sensor_dev_attr_temp1_beep.dev_attr.attr, 1499 &sensor_dev_attr_temp2_beep.dev_attr.attr, 1500 &sensor_dev_attr_temp3_beep.dev_attr.attr, 1501 }; 1502 1503 static struct attribute *it87_attributes_fan16[5][3+1] = { { 1504 &sensor_dev_attr_fan1_input16.dev_attr.attr, 1505 &sensor_dev_attr_fan1_min16.dev_attr.attr, 1506 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1507 NULL 1508 }, { 1509 &sensor_dev_attr_fan2_input16.dev_attr.attr, 1510 &sensor_dev_attr_fan2_min16.dev_attr.attr, 1511 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1512 NULL 1513 }, { 1514 &sensor_dev_attr_fan3_input16.dev_attr.attr, 1515 &sensor_dev_attr_fan3_min16.dev_attr.attr, 1516 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1517 NULL 1518 }, { 1519 &sensor_dev_attr_fan4_input16.dev_attr.attr, 1520 &sensor_dev_attr_fan4_min16.dev_attr.attr, 1521 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1522 NULL 1523 }, { 1524 &sensor_dev_attr_fan5_input16.dev_attr.attr, 1525 &sensor_dev_attr_fan5_min16.dev_attr.attr, 1526 &sensor_dev_attr_fan5_alarm.dev_attr.attr, 1527 NULL 1528 } }; 1529 1530 static const struct attribute_group it87_group_fan16[5] = { 1531 { .attrs = it87_attributes_fan16[0] }, 1532 { .attrs = it87_attributes_fan16[1] }, 1533 { .attrs = it87_attributes_fan16[2] }, 1534 { .attrs = it87_attributes_fan16[3] }, 1535 { .attrs = it87_attributes_fan16[4] }, 1536 }; 1537 1538 static struct attribute *it87_attributes_fan[3][4+1] = { { 1539 &sensor_dev_attr_fan1_input.dev_attr.attr, 1540 &sensor_dev_attr_fan1_min.dev_attr.attr, 1541 &sensor_dev_attr_fan1_div.dev_attr.attr, 1542 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1543 NULL 1544 }, { 1545 &sensor_dev_attr_fan2_input.dev_attr.attr, 1546 &sensor_dev_attr_fan2_min.dev_attr.attr, 1547 &sensor_dev_attr_fan2_div.dev_attr.attr, 1548 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1549 NULL 1550 }, { 1551 &sensor_dev_attr_fan3_input.dev_attr.attr, 1552 &sensor_dev_attr_fan3_min.dev_attr.attr, 1553 &sensor_dev_attr_fan3_div.dev_attr.attr, 1554 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1555 NULL 1556 } }; 1557 1558 static const struct attribute_group it87_group_fan[3] = { 1559 { .attrs = it87_attributes_fan[0] }, 1560 { .attrs = it87_attributes_fan[1] }, 1561 { .attrs = it87_attributes_fan[2] }, 1562 }; 1563 1564 static const struct attribute_group * 1565 it87_get_fan_group(const struct it87_data *data) 1566 { 1567 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan; 1568 } 1569 1570 static struct attribute *it87_attributes_pwm[3][4+1] = { { 1571 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1572 &sensor_dev_attr_pwm1.dev_attr.attr, 1573 &dev_attr_pwm1_freq.attr, 1574 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, 1575 NULL 1576 }, { 1577 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1578 &sensor_dev_attr_pwm2.dev_attr.attr, 1579 &dev_attr_pwm2_freq.attr, 1580 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr, 1581 NULL 1582 }, { 1583 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1584 &sensor_dev_attr_pwm3.dev_attr.attr, 1585 &dev_attr_pwm3_freq.attr, 1586 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, 1587 NULL 1588 } }; 1589 1590 static const struct attribute_group it87_group_pwm[3] = { 1591 { .attrs = it87_attributes_pwm[0] }, 1592 { .attrs = it87_attributes_pwm[1] }, 1593 { .attrs = it87_attributes_pwm[2] }, 1594 }; 1595 1596 static struct attribute *it87_attributes_autopwm[3][9+1] = { { 1597 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1598 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1599 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 1600 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 1601 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 1602 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 1603 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 1604 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 1605 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 1606 NULL 1607 }, { 1608 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, 1609 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, 1610 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr, 1611 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr, 1612 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr, 1613 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr, 1614 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr, 1615 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr, 1616 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr, 1617 NULL 1618 }, { 1619 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, 1620 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, 1621 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr, 1622 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr, 1623 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr, 1624 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr, 1625 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr, 1626 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr, 1627 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr, 1628 NULL 1629 } }; 1630 1631 static const struct attribute_group it87_group_autopwm[3] = { 1632 { .attrs = it87_attributes_autopwm[0] }, 1633 { .attrs = it87_attributes_autopwm[1] }, 1634 { .attrs = it87_attributes_autopwm[2] }, 1635 }; 1636 1637 static struct attribute *it87_attributes_fan_beep[] = { 1638 &sensor_dev_attr_fan1_beep.dev_attr.attr, 1639 &sensor_dev_attr_fan2_beep.dev_attr.attr, 1640 &sensor_dev_attr_fan3_beep.dev_attr.attr, 1641 &sensor_dev_attr_fan4_beep.dev_attr.attr, 1642 &sensor_dev_attr_fan5_beep.dev_attr.attr, 1643 }; 1644 1645 static struct attribute *it87_attributes_vid[] = { 1646 &dev_attr_vrm.attr, 1647 &dev_attr_cpu0_vid.attr, 1648 NULL 1649 }; 1650 1651 static const struct attribute_group it87_group_vid = { 1652 .attrs = it87_attributes_vid, 1653 }; 1654 1655 static struct attribute *it87_attributes_label[] = { 1656 &sensor_dev_attr_in3_label.dev_attr.attr, 1657 &sensor_dev_attr_in7_label.dev_attr.attr, 1658 &sensor_dev_attr_in8_label.dev_attr.attr, 1659 NULL 1660 }; 1661 1662 static const struct attribute_group it87_group_label = { 1663 .attrs = it87_attributes_label, 1664 }; 1665 1666 /* SuperIO detection - will change isa_address if a chip is found */ 1667 static int __init it87_find(unsigned short *address, 1668 struct it87_sio_data *sio_data) 1669 { 1670 int err; 1671 u16 chip_type; 1672 const char *board_vendor, *board_name; 1673 1674 err = superio_enter(); 1675 if (err) 1676 return err; 1677 1678 err = -ENODEV; 1679 chip_type = force_id ? force_id : superio_inw(DEVID); 1680 1681 switch (chip_type) { 1682 case IT8705F_DEVID: 1683 sio_data->type = it87; 1684 break; 1685 case IT8712F_DEVID: 1686 sio_data->type = it8712; 1687 break; 1688 case IT8716F_DEVID: 1689 case IT8726F_DEVID: 1690 sio_data->type = it8716; 1691 break; 1692 case IT8718F_DEVID: 1693 sio_data->type = it8718; 1694 break; 1695 case IT8720F_DEVID: 1696 sio_data->type = it8720; 1697 break; 1698 case IT8721F_DEVID: 1699 sio_data->type = it8721; 1700 break; 1701 case IT8728F_DEVID: 1702 sio_data->type = it8728; 1703 break; 1704 case IT8782F_DEVID: 1705 sio_data->type = it8782; 1706 break; 1707 case IT8783E_DEVID: 1708 sio_data->type = it8783; 1709 break; 1710 case 0xffff: /* No device at all */ 1711 goto exit; 1712 default: 1713 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type); 1714 goto exit; 1715 } 1716 1717 superio_select(PME); 1718 if (!(superio_inb(IT87_ACT_REG) & 0x01)) { 1719 pr_info("Device not activated, skipping\n"); 1720 goto exit; 1721 } 1722 1723 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); 1724 if (*address == 0) { 1725 pr_info("Base address not set, skipping\n"); 1726 goto exit; 1727 } 1728 1729 err = 0; 1730 sio_data->revision = superio_inb(DEVREV) & 0x0f; 1731 pr_info("Found IT%04xF chip at 0x%x, revision %d\n", 1732 chip_type, *address, sio_data->revision); 1733 1734 /* in8 (Vbat) is always internal */ 1735 sio_data->internal = (1 << 2); 1736 1737 /* Read GPIO config and VID value from LDN 7 (GPIO) */ 1738 if (sio_data->type == it87) { 1739 /* The IT8705F doesn't have VID pins at all */ 1740 sio_data->skip_vid = 1; 1741 1742 /* The IT8705F has a different LD number for GPIO */ 1743 superio_select(5); 1744 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1745 } else if (sio_data->type == it8783) { 1746 int reg25, reg27, reg2A, reg2C, regEF; 1747 1748 sio_data->skip_vid = 1; /* No VID */ 1749 1750 superio_select(GPIO); 1751 1752 reg25 = superio_inb(IT87_SIO_GPIO1_REG); 1753 reg27 = superio_inb(IT87_SIO_GPIO3_REG); 1754 reg2A = superio_inb(IT87_SIO_PINX1_REG); 1755 reg2C = superio_inb(IT87_SIO_PINX2_REG); 1756 regEF = superio_inb(IT87_SIO_SPI_REG); 1757 1758 /* Check if fan3 is there or not */ 1759 if ((reg27 & (1 << 0)) || !(reg2C & (1 << 2))) 1760 sio_data->skip_fan |= (1 << 2); 1761 if ((reg25 & (1 << 4)) 1762 || (!(reg2A & (1 << 1)) && (regEF & (1 << 0)))) 1763 sio_data->skip_pwm |= (1 << 2); 1764 1765 /* Check if fan2 is there or not */ 1766 if (reg27 & (1 << 7)) 1767 sio_data->skip_fan |= (1 << 1); 1768 if (reg27 & (1 << 3)) 1769 sio_data->skip_pwm |= (1 << 1); 1770 1771 /* VIN5 */ 1772 if ((reg27 & (1 << 0)) || (reg2C & (1 << 2))) 1773 sio_data->skip_in |= (1 << 5); /* No VIN5 */ 1774 1775 /* VIN6 */ 1776 if (reg27 & (1 << 1)) 1777 sio_data->skip_in |= (1 << 6); /* No VIN6 */ 1778 1779 /* 1780 * VIN7 1781 * Does not depend on bit 2 of Reg2C, contrary to datasheet. 1782 */ 1783 if (reg27 & (1 << 2)) { 1784 /* 1785 * The data sheet is a bit unclear regarding the 1786 * internal voltage divider for VCCH5V. It says 1787 * "This bit enables and switches VIN7 (pin 91) to the 1788 * internal voltage divider for VCCH5V". 1789 * This is different to other chips, where the internal 1790 * voltage divider would connect VIN7 to an internal 1791 * voltage source. Maybe that is the case here as well. 1792 * 1793 * Since we don't know for sure, re-route it if that is 1794 * not the case, and ask the user to report if the 1795 * resulting voltage is sane. 1796 */ 1797 if (!(reg2C & (1 << 1))) { 1798 reg2C |= (1 << 1); 1799 superio_outb(IT87_SIO_PINX2_REG, reg2C); 1800 pr_notice("Routing internal VCCH5V to in7.\n"); 1801 } 1802 pr_notice("in7 routed to internal voltage divider, with external pin disabled.\n"); 1803 pr_notice("Please report if it displays a reasonable voltage.\n"); 1804 } 1805 1806 if (reg2C & (1 << 0)) 1807 sio_data->internal |= (1 << 0); 1808 if (reg2C & (1 << 1)) 1809 sio_data->internal |= (1 << 1); 1810 1811 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1812 1813 } else { 1814 int reg; 1815 bool uart6; 1816 1817 superio_select(GPIO); 1818 1819 reg = superio_inb(IT87_SIO_GPIO3_REG); 1820 if (sio_data->type == it8721 || sio_data->type == it8728 || 1821 sio_data->type == it8782) { 1822 /* 1823 * IT8721F/IT8758E, and IT8782F don't have VID pins 1824 * at all, not sure about the IT8728F. 1825 */ 1826 sio_data->skip_vid = 1; 1827 } else { 1828 /* We need at least 4 VID pins */ 1829 if (reg & 0x0f) { 1830 pr_info("VID is disabled (pins used for GPIO)\n"); 1831 sio_data->skip_vid = 1; 1832 } 1833 } 1834 1835 /* Check if fan3 is there or not */ 1836 if (reg & (1 << 6)) 1837 sio_data->skip_pwm |= (1 << 2); 1838 if (reg & (1 << 7)) 1839 sio_data->skip_fan |= (1 << 2); 1840 1841 /* Check if fan2 is there or not */ 1842 reg = superio_inb(IT87_SIO_GPIO5_REG); 1843 if (reg & (1 << 1)) 1844 sio_data->skip_pwm |= (1 << 1); 1845 if (reg & (1 << 2)) 1846 sio_data->skip_fan |= (1 << 1); 1847 1848 if ((sio_data->type == it8718 || sio_data->type == it8720) 1849 && !(sio_data->skip_vid)) 1850 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG); 1851 1852 reg = superio_inb(IT87_SIO_PINX2_REG); 1853 1854 uart6 = sio_data->type == it8782 && (reg & (1 << 2)); 1855 1856 /* 1857 * The IT8720F has no VIN7 pin, so VCCH should always be 1858 * routed internally to VIN7 with an internal divider. 1859 * Curiously, there still is a configuration bit to control 1860 * this, which means it can be set incorrectly. And even 1861 * more curiously, many boards out there are improperly 1862 * configured, even though the IT8720F datasheet claims 1863 * that the internal routing of VCCH to VIN7 is the default 1864 * setting. So we force the internal routing in this case. 1865 * 1866 * On IT8782F, VIN7 is multiplexed with one of the UART6 pins. 1867 * If UART6 is enabled, re-route VIN7 to the internal divider 1868 * if that is not already the case. 1869 */ 1870 if ((sio_data->type == it8720 || uart6) && !(reg & (1 << 1))) { 1871 reg |= (1 << 1); 1872 superio_outb(IT87_SIO_PINX2_REG, reg); 1873 pr_notice("Routing internal VCCH to in7\n"); 1874 } 1875 if (reg & (1 << 0)) 1876 sio_data->internal |= (1 << 0); 1877 if ((reg & (1 << 1)) || sio_data->type == it8721 || 1878 sio_data->type == it8728) 1879 sio_data->internal |= (1 << 1); 1880 1881 /* 1882 * On IT8782F, UART6 pins overlap with VIN5, VIN6, and VIN7. 1883 * While VIN7 can be routed to the internal voltage divider, 1884 * VIN5 and VIN6 are not available if UART6 is enabled. 1885 * 1886 * Also, temp3 is not available if UART6 is enabled and TEMPIN3 1887 * is the temperature source. Since we can not read the 1888 * temperature source here, skip_temp is preliminary. 1889 */ 1890 if (uart6) { 1891 sio_data->skip_in |= (1 << 5) | (1 << 6); 1892 sio_data->skip_temp |= (1 << 2); 1893 } 1894 1895 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1896 } 1897 if (sio_data->beep_pin) 1898 pr_info("Beeping is supported\n"); 1899 1900 /* Disable specific features based on DMI strings */ 1901 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR); 1902 board_name = dmi_get_system_info(DMI_BOARD_NAME); 1903 if (board_vendor && board_name) { 1904 if (strcmp(board_vendor, "nVIDIA") == 0 1905 && strcmp(board_name, "FN68PT") == 0) { 1906 /* 1907 * On the Shuttle SN68PT, FAN_CTL2 is apparently not 1908 * connected to a fan, but to something else. One user 1909 * has reported instant system power-off when changing 1910 * the PWM2 duty cycle, so we disable it. 1911 * I use the board name string as the trigger in case 1912 * the same board is ever used in other systems. 1913 */ 1914 pr_info("Disabling pwm2 due to hardware constraints\n"); 1915 sio_data->skip_pwm = (1 << 1); 1916 } 1917 } 1918 1919 exit: 1920 superio_exit(); 1921 return err; 1922 } 1923 1924 static void it87_remove_files(struct device *dev) 1925 { 1926 struct it87_data *data = platform_get_drvdata(pdev); 1927 struct it87_sio_data *sio_data = dev->platform_data; 1928 const struct attribute_group *fan_group = it87_get_fan_group(data); 1929 int i; 1930 1931 sysfs_remove_group(&dev->kobj, &it87_group); 1932 for (i = 0; i < 9; i++) { 1933 if (sio_data->skip_in & (1 << i)) 1934 continue; 1935 sysfs_remove_group(&dev->kobj, &it87_group_in[i]); 1936 if (it87_attributes_in_beep[i]) 1937 sysfs_remove_file(&dev->kobj, 1938 it87_attributes_in_beep[i]); 1939 } 1940 for (i = 0; i < 3; i++) { 1941 if (!(data->has_temp & (1 << i))) 1942 continue; 1943 sysfs_remove_group(&dev->kobj, &it87_group_temp[i]); 1944 if (sio_data->beep_pin) 1945 sysfs_remove_file(&dev->kobj, 1946 it87_attributes_temp_beep[i]); 1947 } 1948 for (i = 0; i < 5; i++) { 1949 if (!(data->has_fan & (1 << i))) 1950 continue; 1951 sysfs_remove_group(&dev->kobj, &fan_group[i]); 1952 if (sio_data->beep_pin) 1953 sysfs_remove_file(&dev->kobj, 1954 it87_attributes_fan_beep[i]); 1955 } 1956 for (i = 0; i < 3; i++) { 1957 if (sio_data->skip_pwm & (1 << 0)) 1958 continue; 1959 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]); 1960 if (has_old_autopwm(data)) 1961 sysfs_remove_group(&dev->kobj, 1962 &it87_group_autopwm[i]); 1963 } 1964 if (!sio_data->skip_vid) 1965 sysfs_remove_group(&dev->kobj, &it87_group_vid); 1966 sysfs_remove_group(&dev->kobj, &it87_group_label); 1967 } 1968 1969 static int it87_probe(struct platform_device *pdev) 1970 { 1971 struct it87_data *data; 1972 struct resource *res; 1973 struct device *dev = &pdev->dev; 1974 struct it87_sio_data *sio_data = dev->platform_data; 1975 const struct attribute_group *fan_group; 1976 int err = 0, i; 1977 int enable_pwm_interface; 1978 int fan_beep_need_rw; 1979 static const char * const names[] = { 1980 "it87", 1981 "it8712", 1982 "it8716", 1983 "it8718", 1984 "it8720", 1985 "it8721", 1986 "it8728", 1987 "it8782", 1988 "it8783", 1989 }; 1990 1991 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1992 if (!devm_request_region(&pdev->dev, res->start, IT87_EC_EXTENT, 1993 DRVNAME)) { 1994 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", 1995 (unsigned long)res->start, 1996 (unsigned long)(res->start + IT87_EC_EXTENT - 1)); 1997 return -EBUSY; 1998 } 1999 2000 data = devm_kzalloc(&pdev->dev, sizeof(struct it87_data), GFP_KERNEL); 2001 if (!data) 2002 return -ENOMEM; 2003 2004 data->addr = res->start; 2005 data->type = sio_data->type; 2006 data->revision = sio_data->revision; 2007 data->name = names[sio_data->type]; 2008 2009 /* Now, we do the remaining detection. */ 2010 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80) 2011 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) 2012 return -ENODEV; 2013 2014 platform_set_drvdata(pdev, data); 2015 2016 mutex_init(&data->update_lock); 2017 2018 /* Check PWM configuration */ 2019 enable_pwm_interface = it87_check_pwm(dev); 2020 2021 /* Starting with IT8721F, we handle scaling of internal voltages */ 2022 if (has_12mv_adc(data)) { 2023 if (sio_data->internal & (1 << 0)) 2024 data->in_scaled |= (1 << 3); /* in3 is AVCC */ 2025 if (sio_data->internal & (1 << 1)) 2026 data->in_scaled |= (1 << 7); /* in7 is VSB */ 2027 if (sio_data->internal & (1 << 2)) 2028 data->in_scaled |= (1 << 8); /* in8 is Vbat */ 2029 } else if (sio_data->type == it8782 || sio_data->type == it8783) { 2030 if (sio_data->internal & (1 << 0)) 2031 data->in_scaled |= (1 << 3); /* in3 is VCC5V */ 2032 if (sio_data->internal & (1 << 1)) 2033 data->in_scaled |= (1 << 7); /* in7 is VCCH5V */ 2034 } 2035 2036 data->has_temp = 0x07; 2037 if (sio_data->skip_temp & (1 << 2)) { 2038 if (sio_data->type == it8782 2039 && !(it87_read_value(data, IT87_REG_TEMP_EXTRA) & 0x80)) 2040 data->has_temp &= ~(1 << 2); 2041 } 2042 2043 /* Initialize the IT87 chip */ 2044 it87_init_device(pdev); 2045 2046 /* Register sysfs hooks */ 2047 err = sysfs_create_group(&dev->kobj, &it87_group); 2048 if (err) 2049 return err; 2050 2051 for (i = 0; i < 9; i++) { 2052 if (sio_data->skip_in & (1 << i)) 2053 continue; 2054 err = sysfs_create_group(&dev->kobj, &it87_group_in[i]); 2055 if (err) 2056 goto error; 2057 if (sio_data->beep_pin && it87_attributes_in_beep[i]) { 2058 err = sysfs_create_file(&dev->kobj, 2059 it87_attributes_in_beep[i]); 2060 if (err) 2061 goto error; 2062 } 2063 } 2064 2065 for (i = 0; i < 3; i++) { 2066 if (!(data->has_temp & (1 << i))) 2067 continue; 2068 err = sysfs_create_group(&dev->kobj, &it87_group_temp[i]); 2069 if (err) 2070 goto error; 2071 if (sio_data->beep_pin) { 2072 err = sysfs_create_file(&dev->kobj, 2073 it87_attributes_temp_beep[i]); 2074 if (err) 2075 goto error; 2076 } 2077 } 2078 2079 /* Do not create fan files for disabled fans */ 2080 fan_group = it87_get_fan_group(data); 2081 fan_beep_need_rw = 1; 2082 for (i = 0; i < 5; i++) { 2083 if (!(data->has_fan & (1 << i))) 2084 continue; 2085 err = sysfs_create_group(&dev->kobj, &fan_group[i]); 2086 if (err) 2087 goto error; 2088 2089 if (sio_data->beep_pin) { 2090 err = sysfs_create_file(&dev->kobj, 2091 it87_attributes_fan_beep[i]); 2092 if (err) 2093 goto error; 2094 if (!fan_beep_need_rw) 2095 continue; 2096 2097 /* 2098 * As we have a single beep enable bit for all fans, 2099 * only the first enabled fan has a writable attribute 2100 * for it. 2101 */ 2102 if (sysfs_chmod_file(&dev->kobj, 2103 it87_attributes_fan_beep[i], 2104 S_IRUGO | S_IWUSR)) 2105 dev_dbg(dev, "chmod +w fan%d_beep failed\n", 2106 i + 1); 2107 fan_beep_need_rw = 0; 2108 } 2109 } 2110 2111 if (enable_pwm_interface) { 2112 for (i = 0; i < 3; i++) { 2113 if (sio_data->skip_pwm & (1 << i)) 2114 continue; 2115 err = sysfs_create_group(&dev->kobj, 2116 &it87_group_pwm[i]); 2117 if (err) 2118 goto error; 2119 2120 if (!has_old_autopwm(data)) 2121 continue; 2122 err = sysfs_create_group(&dev->kobj, 2123 &it87_group_autopwm[i]); 2124 if (err) 2125 goto error; 2126 } 2127 } 2128 2129 if (!sio_data->skip_vid) { 2130 data->vrm = vid_which_vrm(); 2131 /* VID reading from Super-I/O config space if available */ 2132 data->vid = sio_data->vid_value; 2133 err = sysfs_create_group(&dev->kobj, &it87_group_vid); 2134 if (err) 2135 goto error; 2136 } 2137 2138 /* Export labels for internal sensors */ 2139 for (i = 0; i < 3; i++) { 2140 if (!(sio_data->internal & (1 << i))) 2141 continue; 2142 err = sysfs_create_file(&dev->kobj, 2143 it87_attributes_label[i]); 2144 if (err) 2145 goto error; 2146 } 2147 2148 data->hwmon_dev = hwmon_device_register(dev); 2149 if (IS_ERR(data->hwmon_dev)) { 2150 err = PTR_ERR(data->hwmon_dev); 2151 goto error; 2152 } 2153 2154 return 0; 2155 2156 error: 2157 it87_remove_files(dev); 2158 return err; 2159 } 2160 2161 static int it87_remove(struct platform_device *pdev) 2162 { 2163 struct it87_data *data = platform_get_drvdata(pdev); 2164 2165 hwmon_device_unregister(data->hwmon_dev); 2166 it87_remove_files(&pdev->dev); 2167 2168 return 0; 2169 } 2170 2171 /* 2172 * Must be called with data->update_lock held, except during initialization. 2173 * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 2174 * would slow down the IT87 access and should not be necessary. 2175 */ 2176 static int it87_read_value(struct it87_data *data, u8 reg) 2177 { 2178 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 2179 return inb_p(data->addr + IT87_DATA_REG_OFFSET); 2180 } 2181 2182 /* 2183 * Must be called with data->update_lock held, except during initialization. 2184 * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 2185 * would slow down the IT87 access and should not be necessary. 2186 */ 2187 static void it87_write_value(struct it87_data *data, u8 reg, u8 value) 2188 { 2189 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 2190 outb_p(value, data->addr + IT87_DATA_REG_OFFSET); 2191 } 2192 2193 /* Return 1 if and only if the PWM interface is safe to use */ 2194 static int it87_check_pwm(struct device *dev) 2195 { 2196 struct it87_data *data = dev_get_drvdata(dev); 2197 /* 2198 * Some BIOSes fail to correctly configure the IT87 fans. All fans off 2199 * and polarity set to active low is sign that this is the case so we 2200 * disable pwm control to protect the user. 2201 */ 2202 int tmp = it87_read_value(data, IT87_REG_FAN_CTL); 2203 if ((tmp & 0x87) == 0) { 2204 if (fix_pwm_polarity) { 2205 /* 2206 * The user asks us to attempt a chip reconfiguration. 2207 * This means switching to active high polarity and 2208 * inverting all fan speed values. 2209 */ 2210 int i; 2211 u8 pwm[3]; 2212 2213 for (i = 0; i < 3; i++) 2214 pwm[i] = it87_read_value(data, 2215 IT87_REG_PWM(i)); 2216 2217 /* 2218 * If any fan is in automatic pwm mode, the polarity 2219 * might be correct, as suspicious as it seems, so we 2220 * better don't change anything (but still disable the 2221 * PWM interface). 2222 */ 2223 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) { 2224 dev_info(dev, "Reconfiguring PWM to " 2225 "active high polarity\n"); 2226 it87_write_value(data, IT87_REG_FAN_CTL, 2227 tmp | 0x87); 2228 for (i = 0; i < 3; i++) 2229 it87_write_value(data, 2230 IT87_REG_PWM(i), 2231 0x7f & ~pwm[i]); 2232 return 1; 2233 } 2234 2235 dev_info(dev, "PWM configuration is " 2236 "too broken to be fixed\n"); 2237 } 2238 2239 dev_info(dev, "Detected broken BIOS " 2240 "defaults, disabling PWM interface\n"); 2241 return 0; 2242 } else if (fix_pwm_polarity) { 2243 dev_info(dev, "PWM configuration looks " 2244 "sane, won't touch\n"); 2245 } 2246 2247 return 1; 2248 } 2249 2250 /* Called when we have found a new IT87. */ 2251 static void it87_init_device(struct platform_device *pdev) 2252 { 2253 struct it87_sio_data *sio_data = pdev->dev.platform_data; 2254 struct it87_data *data = platform_get_drvdata(pdev); 2255 int tmp, i; 2256 u8 mask; 2257 2258 /* 2259 * For each PWM channel: 2260 * - If it is in automatic mode, setting to manual mode should set 2261 * the fan to full speed by default. 2262 * - If it is in manual mode, we need a mapping to temperature 2263 * channels to use when later setting to automatic mode later. 2264 * Use a 1:1 mapping by default (we are clueless.) 2265 * In both cases, the value can (and should) be changed by the user 2266 * prior to switching to a different mode. 2267 * Note that this is no longer needed for the IT8721F and later, as 2268 * these have separate registers for the temperature mapping and the 2269 * manual duty cycle. 2270 */ 2271 for (i = 0; i < 3; i++) { 2272 data->pwm_temp_map[i] = i; 2273 data->pwm_duty[i] = 0x7f; /* Full speed */ 2274 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */ 2275 } 2276 2277 /* 2278 * Some chips seem to have default value 0xff for all limit 2279 * registers. For low voltage limits it makes no sense and triggers 2280 * alarms, so change to 0 instead. For high temperature limits, it 2281 * means -1 degree C, which surprisingly doesn't trigger an alarm, 2282 * but is still confusing, so change to 127 degrees C. 2283 */ 2284 for (i = 0; i < 8; i++) { 2285 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i)); 2286 if (tmp == 0xff) 2287 it87_write_value(data, IT87_REG_VIN_MIN(i), 0); 2288 } 2289 for (i = 0; i < 3; i++) { 2290 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 2291 if (tmp == 0xff) 2292 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127); 2293 } 2294 2295 /* 2296 * Temperature channels are not forcibly enabled, as they can be 2297 * set to two different sensor types and we can't guess which one 2298 * is correct for a given system. These channels can be enabled at 2299 * run-time through the temp{1-3}_type sysfs accessors if needed. 2300 */ 2301 2302 /* Check if voltage monitors are reset manually or by some reason */ 2303 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE); 2304 if ((tmp & 0xff) == 0) { 2305 /* Enable all voltage monitors */ 2306 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff); 2307 } 2308 2309 /* Check if tachometers are reset manually or by some reason */ 2310 mask = 0x70 & ~(sio_data->skip_fan << 4); 2311 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL); 2312 if ((data->fan_main_ctrl & mask) == 0) { 2313 /* Enable all fan tachometers */ 2314 data->fan_main_ctrl |= mask; 2315 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 2316 data->fan_main_ctrl); 2317 } 2318 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07; 2319 2320 /* Set tachometers to 16-bit mode if needed */ 2321 if (has_16bit_fans(data)) { 2322 tmp = it87_read_value(data, IT87_REG_FAN_16BIT); 2323 if (~tmp & 0x07 & data->has_fan) { 2324 dev_dbg(&pdev->dev, 2325 "Setting fan1-3 to 16-bit mode\n"); 2326 it87_write_value(data, IT87_REG_FAN_16BIT, 2327 tmp | 0x07); 2328 } 2329 /* IT8705F, IT8782F, and IT8783E/F only support three fans. */ 2330 if (data->type != it87 && data->type != it8782 && 2331 data->type != it8783) { 2332 if (tmp & (1 << 4)) 2333 data->has_fan |= (1 << 3); /* fan4 enabled */ 2334 if (tmp & (1 << 5)) 2335 data->has_fan |= (1 << 4); /* fan5 enabled */ 2336 } 2337 } 2338 2339 /* Fan input pins may be used for alternative functions */ 2340 data->has_fan &= ~sio_data->skip_fan; 2341 2342 /* Start monitoring */ 2343 it87_write_value(data, IT87_REG_CONFIG, 2344 (it87_read_value(data, IT87_REG_CONFIG) & 0x3e) 2345 | (update_vbat ? 0x41 : 0x01)); 2346 } 2347 2348 static void it87_update_pwm_ctrl(struct it87_data *data, int nr) 2349 { 2350 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr)); 2351 if (has_newer_autopwm(data)) { 2352 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03; 2353 data->pwm_duty[nr] = it87_read_value(data, 2354 IT87_REG_PWM_DUTY(nr)); 2355 } else { 2356 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */ 2357 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03; 2358 else /* Manual mode */ 2359 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f; 2360 } 2361 2362 if (has_old_autopwm(data)) { 2363 int i; 2364 2365 for (i = 0; i < 5 ; i++) 2366 data->auto_temp[nr][i] = it87_read_value(data, 2367 IT87_REG_AUTO_TEMP(nr, i)); 2368 for (i = 0; i < 3 ; i++) 2369 data->auto_pwm[nr][i] = it87_read_value(data, 2370 IT87_REG_AUTO_PWM(nr, i)); 2371 } 2372 } 2373 2374 static struct it87_data *it87_update_device(struct device *dev) 2375 { 2376 struct it87_data *data = dev_get_drvdata(dev); 2377 int i; 2378 2379 mutex_lock(&data->update_lock); 2380 2381 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 2382 || !data->valid) { 2383 if (update_vbat) { 2384 /* 2385 * Cleared after each update, so reenable. Value 2386 * returned by this read will be previous value 2387 */ 2388 it87_write_value(data, IT87_REG_CONFIG, 2389 it87_read_value(data, IT87_REG_CONFIG) | 0x40); 2390 } 2391 for (i = 0; i <= 7; i++) { 2392 data->in[i] = 2393 it87_read_value(data, IT87_REG_VIN(i)); 2394 data->in_min[i] = 2395 it87_read_value(data, IT87_REG_VIN_MIN(i)); 2396 data->in_max[i] = 2397 it87_read_value(data, IT87_REG_VIN_MAX(i)); 2398 } 2399 /* in8 (battery) has no limit registers */ 2400 data->in[8] = it87_read_value(data, IT87_REG_VIN(8)); 2401 2402 for (i = 0; i < 5; i++) { 2403 /* Skip disabled fans */ 2404 if (!(data->has_fan & (1 << i))) 2405 continue; 2406 2407 data->fan_min[i] = 2408 it87_read_value(data, IT87_REG_FAN_MIN[i]); 2409 data->fan[i] = it87_read_value(data, 2410 IT87_REG_FAN[i]); 2411 /* Add high byte if in 16-bit mode */ 2412 if (has_16bit_fans(data)) { 2413 data->fan[i] |= it87_read_value(data, 2414 IT87_REG_FANX[i]) << 8; 2415 data->fan_min[i] |= it87_read_value(data, 2416 IT87_REG_FANX_MIN[i]) << 8; 2417 } 2418 } 2419 for (i = 0; i < 3; i++) { 2420 if (!(data->has_temp & (1 << i))) 2421 continue; 2422 data->temp[i] = 2423 it87_read_value(data, IT87_REG_TEMP(i)); 2424 data->temp_high[i] = 2425 it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 2426 data->temp_low[i] = 2427 it87_read_value(data, IT87_REG_TEMP_LOW(i)); 2428 } 2429 2430 /* Newer chips don't have clock dividers */ 2431 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) { 2432 i = it87_read_value(data, IT87_REG_FAN_DIV); 2433 data->fan_div[0] = i & 0x07; 2434 data->fan_div[1] = (i >> 3) & 0x07; 2435 data->fan_div[2] = (i & 0x40) ? 3 : 1; 2436 } 2437 2438 data->alarms = 2439 it87_read_value(data, IT87_REG_ALARM1) | 2440 (it87_read_value(data, IT87_REG_ALARM2) << 8) | 2441 (it87_read_value(data, IT87_REG_ALARM3) << 16); 2442 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE); 2443 2444 data->fan_main_ctrl = it87_read_value(data, 2445 IT87_REG_FAN_MAIN_CTRL); 2446 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL); 2447 for (i = 0; i < 3; i++) 2448 it87_update_pwm_ctrl(data, i); 2449 2450 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE); 2451 /* 2452 * The IT8705F does not have VID capability. 2453 * The IT8718F and later don't use IT87_REG_VID for the 2454 * same purpose. 2455 */ 2456 if (data->type == it8712 || data->type == it8716) { 2457 data->vid = it87_read_value(data, IT87_REG_VID); 2458 /* 2459 * The older IT8712F revisions had only 5 VID pins, 2460 * but we assume it is always safe to read 6 bits. 2461 */ 2462 data->vid &= 0x3f; 2463 } 2464 data->last_updated = jiffies; 2465 data->valid = 1; 2466 } 2467 2468 mutex_unlock(&data->update_lock); 2469 2470 return data; 2471 } 2472 2473 static int __init it87_device_add(unsigned short address, 2474 const struct it87_sio_data *sio_data) 2475 { 2476 struct resource res = { 2477 .start = address + IT87_EC_OFFSET, 2478 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1, 2479 .name = DRVNAME, 2480 .flags = IORESOURCE_IO, 2481 }; 2482 int err; 2483 2484 err = acpi_check_resource_conflict(&res); 2485 if (err) 2486 goto exit; 2487 2488 pdev = platform_device_alloc(DRVNAME, address); 2489 if (!pdev) { 2490 err = -ENOMEM; 2491 pr_err("Device allocation failed\n"); 2492 goto exit; 2493 } 2494 2495 err = platform_device_add_resources(pdev, &res, 1); 2496 if (err) { 2497 pr_err("Device resource addition failed (%d)\n", err); 2498 goto exit_device_put; 2499 } 2500 2501 err = platform_device_add_data(pdev, sio_data, 2502 sizeof(struct it87_sio_data)); 2503 if (err) { 2504 pr_err("Platform data allocation failed\n"); 2505 goto exit_device_put; 2506 } 2507 2508 err = platform_device_add(pdev); 2509 if (err) { 2510 pr_err("Device addition failed (%d)\n", err); 2511 goto exit_device_put; 2512 } 2513 2514 return 0; 2515 2516 exit_device_put: 2517 platform_device_put(pdev); 2518 exit: 2519 return err; 2520 } 2521 2522 static int __init sm_it87_init(void) 2523 { 2524 int err; 2525 unsigned short isa_address = 0; 2526 struct it87_sio_data sio_data; 2527 2528 memset(&sio_data, 0, sizeof(struct it87_sio_data)); 2529 err = it87_find(&isa_address, &sio_data); 2530 if (err) 2531 return err; 2532 err = platform_driver_register(&it87_driver); 2533 if (err) 2534 return err; 2535 2536 err = it87_device_add(isa_address, &sio_data); 2537 if (err) { 2538 platform_driver_unregister(&it87_driver); 2539 return err; 2540 } 2541 2542 return 0; 2543 } 2544 2545 static void __exit sm_it87_exit(void) 2546 { 2547 platform_device_unregister(pdev); 2548 platform_driver_unregister(&it87_driver); 2549 } 2550 2551 2552 MODULE_AUTHOR("Chris Gauthron, " 2553 "Jean Delvare <khali@linux-fr.org>"); 2554 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver"); 2555 module_param(update_vbat, bool, 0); 2556 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); 2557 module_param(fix_pwm_polarity, bool, 0); 2558 MODULE_PARM_DESC(fix_pwm_polarity, 2559 "Force PWM polarity to active high (DANGEROUS)"); 2560 MODULE_LICENSE("GPL"); 2561 2562 module_init(sm_it87_init); 2563 module_exit(sm_it87_exit); 2564