1 /* 2 * it87.c - Part of lm_sensors, Linux kernel modules for hardware 3 * monitoring. 4 * 5 * The IT8705F is an LPC-based Super I/O part that contains UARTs, a 6 * parallel port, an IR port, a MIDI port, a floppy controller, etc., in 7 * addition to an Environment Controller (Enhanced Hardware Monitor and 8 * Fan Controller) 9 * 10 * This driver supports only the Environment Controller in the IT8705F and 11 * similar parts. The other devices are supported by different drivers. 12 * 13 * Supports: IT8705F Super I/O chip w/LPC interface 14 * IT8712F Super I/O chip w/LPC interface 15 * IT8716F Super I/O chip w/LPC interface 16 * IT8718F Super I/O chip w/LPC interface 17 * IT8720F Super I/O chip w/LPC interface 18 * IT8721F Super I/O chip w/LPC interface 19 * IT8726F Super I/O chip w/LPC interface 20 * IT8758E Super I/O chip w/LPC interface 21 * Sis950 A clone of the IT8705F 22 * 23 * Copyright (C) 2001 Chris Gauthron 24 * Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org> 25 * 26 * This program is free software; you can redistribute it and/or modify 27 * it under the terms of the GNU General Public License as published by 28 * the Free Software Foundation; either version 2 of the License, or 29 * (at your option) any later version. 30 * 31 * This program is distributed in the hope that it will be useful, 32 * but WITHOUT ANY WARRANTY; without even the implied warranty of 33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 34 * GNU General Public License for more details. 35 * 36 * You should have received a copy of the GNU General Public License 37 * along with this program; if not, write to the Free Software 38 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 39 */ 40 41 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 42 43 #include <linux/module.h> 44 #include <linux/init.h> 45 #include <linux/slab.h> 46 #include <linux/jiffies.h> 47 #include <linux/platform_device.h> 48 #include <linux/hwmon.h> 49 #include <linux/hwmon-sysfs.h> 50 #include <linux/hwmon-vid.h> 51 #include <linux/err.h> 52 #include <linux/mutex.h> 53 #include <linux/sysfs.h> 54 #include <linux/string.h> 55 #include <linux/dmi.h> 56 #include <linux/acpi.h> 57 #include <linux/io.h> 58 59 #define DRVNAME "it87" 60 61 enum chips { it87, it8712, it8716, it8718, it8720, it8721 }; 62 63 static unsigned short force_id; 64 module_param(force_id, ushort, 0); 65 MODULE_PARM_DESC(force_id, "Override the detected device ID"); 66 67 static struct platform_device *pdev; 68 69 #define REG 0x2e /* The register to read/write */ 70 #define DEV 0x07 /* Register: Logical device select */ 71 #define VAL 0x2f /* The value to read/write */ 72 #define PME 0x04 /* The device with the fan registers in it */ 73 74 /* The device with the IT8718F/IT8720F VID value in it */ 75 #define GPIO 0x07 76 77 #define DEVID 0x20 /* Register: Device ID */ 78 #define DEVREV 0x22 /* Register: Device Revision */ 79 80 static inline int superio_inb(int reg) 81 { 82 outb(reg, REG); 83 return inb(VAL); 84 } 85 86 static inline void superio_outb(int reg, int val) 87 { 88 outb(reg, REG); 89 outb(val, VAL); 90 } 91 92 static int superio_inw(int reg) 93 { 94 int val; 95 outb(reg++, REG); 96 val = inb(VAL) << 8; 97 outb(reg, REG); 98 val |= inb(VAL); 99 return val; 100 } 101 102 static inline void superio_select(int ldn) 103 { 104 outb(DEV, REG); 105 outb(ldn, VAL); 106 } 107 108 static inline int superio_enter(void) 109 { 110 /* 111 * Try to reserve REG and REG + 1 for exclusive access. 112 */ 113 if (!request_muxed_region(REG, 2, DRVNAME)) 114 return -EBUSY; 115 116 outb(0x87, REG); 117 outb(0x01, REG); 118 outb(0x55, REG); 119 outb(0x55, REG); 120 return 0; 121 } 122 123 static inline void superio_exit(void) 124 { 125 outb(0x02, REG); 126 outb(0x02, VAL); 127 release_region(REG, 2); 128 } 129 130 /* Logical device 4 registers */ 131 #define IT8712F_DEVID 0x8712 132 #define IT8705F_DEVID 0x8705 133 #define IT8716F_DEVID 0x8716 134 #define IT8718F_DEVID 0x8718 135 #define IT8720F_DEVID 0x8720 136 #define IT8721F_DEVID 0x8721 137 #define IT8726F_DEVID 0x8726 138 #define IT87_ACT_REG 0x30 139 #define IT87_BASE_REG 0x60 140 141 /* Logical device 7 registers (IT8712F and later) */ 142 #define IT87_SIO_GPIO3_REG 0x27 143 #define IT87_SIO_GPIO5_REG 0x29 144 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */ 145 #define IT87_SIO_VID_REG 0xfc /* VID value */ 146 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */ 147 148 /* Update battery voltage after every reading if true */ 149 static int update_vbat; 150 151 /* Not all BIOSes properly configure the PWM registers */ 152 static int fix_pwm_polarity; 153 154 /* Many IT87 constants specified below */ 155 156 /* Length of ISA address segment */ 157 #define IT87_EXTENT 8 158 159 /* Length of ISA address segment for Environmental Controller */ 160 #define IT87_EC_EXTENT 2 161 162 /* Offset of EC registers from ISA base address */ 163 #define IT87_EC_OFFSET 5 164 165 /* Where are the ISA address/data registers relative to the EC base address */ 166 #define IT87_ADDR_REG_OFFSET 0 167 #define IT87_DATA_REG_OFFSET 1 168 169 /*----- The IT87 registers -----*/ 170 171 #define IT87_REG_CONFIG 0x00 172 173 #define IT87_REG_ALARM1 0x01 174 #define IT87_REG_ALARM2 0x02 175 #define IT87_REG_ALARM3 0x03 176 177 /* The IT8718F and IT8720F have the VID value in a different register, in 178 Super-I/O configuration space. */ 179 #define IT87_REG_VID 0x0a 180 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b 181 for fan divisors. Later IT8712F revisions must use 16-bit tachometer 182 mode. */ 183 #define IT87_REG_FAN_DIV 0x0b 184 #define IT87_REG_FAN_16BIT 0x0c 185 186 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */ 187 188 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 }; 189 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 }; 190 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 }; 191 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 }; 192 #define IT87_REG_FAN_MAIN_CTRL 0x13 193 #define IT87_REG_FAN_CTL 0x14 194 #define IT87_REG_PWM(nr) (0x15 + (nr)) 195 #define IT87_REG_PWM_DUTY(nr) (0x63 + (nr) * 8) 196 197 #define IT87_REG_VIN(nr) (0x20 + (nr)) 198 #define IT87_REG_TEMP(nr) (0x29 + (nr)) 199 200 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2) 201 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2) 202 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2) 203 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2) 204 205 #define IT87_REG_VIN_ENABLE 0x50 206 #define IT87_REG_TEMP_ENABLE 0x51 207 #define IT87_REG_BEEP_ENABLE 0x5c 208 209 #define IT87_REG_CHIPID 0x58 210 211 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i)) 212 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i)) 213 214 215 struct it87_sio_data { 216 enum chips type; 217 /* Values read from Super-I/O config space */ 218 u8 revision; 219 u8 vid_value; 220 u8 beep_pin; 221 u8 internal; /* Internal sensors can be labeled */ 222 /* Features skipped based on config or DMI */ 223 u8 skip_vid; 224 u8 skip_fan; 225 u8 skip_pwm; 226 }; 227 228 /* For each registered chip, we need to keep some data in memory. 229 The structure is dynamically allocated. */ 230 struct it87_data { 231 struct device *hwmon_dev; 232 enum chips type; 233 u8 revision; 234 235 unsigned short addr; 236 const char *name; 237 struct mutex update_lock; 238 char valid; /* !=0 if following fields are valid */ 239 unsigned long last_updated; /* In jiffies */ 240 241 u16 in_scaled; /* Internal voltage sensors are scaled */ 242 u8 in[9]; /* Register value */ 243 u8 in_max[8]; /* Register value */ 244 u8 in_min[8]; /* Register value */ 245 u8 has_fan; /* Bitfield, fans enabled */ 246 u16 fan[5]; /* Register values, possibly combined */ 247 u16 fan_min[5]; /* Register values, possibly combined */ 248 s8 temp[3]; /* Register value */ 249 s8 temp_high[3]; /* Register value */ 250 s8 temp_low[3]; /* Register value */ 251 u8 sensor; /* Register value */ 252 u8 fan_div[3]; /* Register encoding, shifted right */ 253 u8 vid; /* Register encoding, combined */ 254 u8 vrm; 255 u32 alarms; /* Register encoding, combined */ 256 u8 beeps; /* Register encoding */ 257 u8 fan_main_ctrl; /* Register value */ 258 u8 fan_ctl; /* Register value */ 259 260 /* The following 3 arrays correspond to the same registers up to 261 * the IT8720F. The meaning of bits 6-0 depends on the value of bit 262 * 7, and we want to preserve settings on mode changes, so we have 263 * to track all values separately. 264 * Starting with the IT8721F, the manual PWM duty cycles are stored 265 * in separate registers (8-bit values), so the separate tracking 266 * is no longer needed, but it is still done to keep the driver 267 * simple. */ 268 u8 pwm_ctrl[3]; /* Register value */ 269 u8 pwm_duty[3]; /* Manual PWM value set by user */ 270 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */ 271 272 /* Automatic fan speed control registers */ 273 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */ 274 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */ 275 }; 276 277 static u8 in_to_reg(const struct it87_data *data, int nr, long val) 278 { 279 long lsb; 280 281 if (data->type == it8721) { 282 if (data->in_scaled & (1 << nr)) 283 lsb = 24; 284 else 285 lsb = 12; 286 } else 287 lsb = 16; 288 289 val = DIV_ROUND_CLOSEST(val, lsb); 290 return SENSORS_LIMIT(val, 0, 255); 291 } 292 293 static int in_from_reg(const struct it87_data *data, int nr, int val) 294 { 295 if (data->type == it8721) { 296 if (data->in_scaled & (1 << nr)) 297 return val * 24; 298 else 299 return val * 12; 300 } else 301 return val * 16; 302 } 303 304 static inline u8 FAN_TO_REG(long rpm, int div) 305 { 306 if (rpm == 0) 307 return 255; 308 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 309 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 310 254); 311 } 312 313 static inline u16 FAN16_TO_REG(long rpm) 314 { 315 if (rpm == 0) 316 return 0xffff; 317 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe); 318 } 319 320 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \ 321 1350000 / ((val) * (div))) 322 /* The divider is fixed to 2 in 16-bit mode */ 323 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \ 324 1350000 / ((val) * 2)) 325 326 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \ 327 ((val) + 500) / 1000), -128, 127)) 328 #define TEMP_FROM_REG(val) ((val) * 1000) 329 330 static u8 pwm_to_reg(const struct it87_data *data, long val) 331 { 332 if (data->type == it8721) 333 return val; 334 else 335 return val >> 1; 336 } 337 338 static int pwm_from_reg(const struct it87_data *data, u8 reg) 339 { 340 if (data->type == it8721) 341 return reg; 342 else 343 return (reg & 0x7f) << 1; 344 } 345 346 347 static int DIV_TO_REG(int val) 348 { 349 int answer = 0; 350 while (answer < 7 && (val >>= 1)) 351 answer++; 352 return answer; 353 } 354 #define DIV_FROM_REG(val) (1 << (val)) 355 356 static const unsigned int pwm_freq[8] = { 357 48000000 / 128, 358 24000000 / 128, 359 12000000 / 128, 360 8000000 / 128, 361 6000000 / 128, 362 3000000 / 128, 363 1500000 / 128, 364 750000 / 128, 365 }; 366 367 static inline int has_16bit_fans(const struct it87_data *data) 368 { 369 /* IT8705F Datasheet 0.4.1, 3h == Version G. 370 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J. 371 These are the first revisions with 16bit tachometer support. */ 372 return (data->type == it87 && data->revision >= 0x03) 373 || (data->type == it8712 && data->revision >= 0x08) 374 || data->type == it8716 375 || data->type == it8718 376 || data->type == it8720 377 || data->type == it8721; 378 } 379 380 static inline int has_old_autopwm(const struct it87_data *data) 381 { 382 /* The old automatic fan speed control interface is implemented 383 by IT8705F chips up to revision F and IT8712F chips up to 384 revision G. */ 385 return (data->type == it87 && data->revision < 0x03) 386 || (data->type == it8712 && data->revision < 0x08); 387 } 388 389 static int it87_probe(struct platform_device *pdev); 390 static int __devexit it87_remove(struct platform_device *pdev); 391 392 static int it87_read_value(struct it87_data *data, u8 reg); 393 static void it87_write_value(struct it87_data *data, u8 reg, u8 value); 394 static struct it87_data *it87_update_device(struct device *dev); 395 static int it87_check_pwm(struct device *dev); 396 static void it87_init_device(struct platform_device *pdev); 397 398 399 static struct platform_driver it87_driver = { 400 .driver = { 401 .owner = THIS_MODULE, 402 .name = DRVNAME, 403 }, 404 .probe = it87_probe, 405 .remove = __devexit_p(it87_remove), 406 }; 407 408 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 409 char *buf) 410 { 411 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 412 int nr = sensor_attr->index; 413 414 struct it87_data *data = it87_update_device(dev); 415 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr])); 416 } 417 418 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 419 char *buf) 420 { 421 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 422 int nr = sensor_attr->index; 423 424 struct it87_data *data = it87_update_device(dev); 425 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_min[nr])); 426 } 427 428 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 429 char *buf) 430 { 431 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 432 int nr = sensor_attr->index; 433 434 struct it87_data *data = it87_update_device(dev); 435 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_max[nr])); 436 } 437 438 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 439 const char *buf, size_t count) 440 { 441 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 442 int nr = sensor_attr->index; 443 444 struct it87_data *data = dev_get_drvdata(dev); 445 unsigned long val; 446 447 if (strict_strtoul(buf, 10, &val) < 0) 448 return -EINVAL; 449 450 mutex_lock(&data->update_lock); 451 data->in_min[nr] = in_to_reg(data, nr, val); 452 it87_write_value(data, IT87_REG_VIN_MIN(nr), 453 data->in_min[nr]); 454 mutex_unlock(&data->update_lock); 455 return count; 456 } 457 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 458 const char *buf, size_t count) 459 { 460 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 461 int nr = sensor_attr->index; 462 463 struct it87_data *data = dev_get_drvdata(dev); 464 unsigned long val; 465 466 if (strict_strtoul(buf, 10, &val) < 0) 467 return -EINVAL; 468 469 mutex_lock(&data->update_lock); 470 data->in_max[nr] = in_to_reg(data, nr, val); 471 it87_write_value(data, IT87_REG_VIN_MAX(nr), 472 data->in_max[nr]); 473 mutex_unlock(&data->update_lock); 474 return count; 475 } 476 477 #define show_in_offset(offset) \ 478 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 479 show_in, NULL, offset); 480 481 #define limit_in_offset(offset) \ 482 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 483 show_in_min, set_in_min, offset); \ 484 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 485 show_in_max, set_in_max, offset); 486 487 show_in_offset(0); 488 limit_in_offset(0); 489 show_in_offset(1); 490 limit_in_offset(1); 491 show_in_offset(2); 492 limit_in_offset(2); 493 show_in_offset(3); 494 limit_in_offset(3); 495 show_in_offset(4); 496 limit_in_offset(4); 497 show_in_offset(5); 498 limit_in_offset(5); 499 show_in_offset(6); 500 limit_in_offset(6); 501 show_in_offset(7); 502 limit_in_offset(7); 503 show_in_offset(8); 504 505 /* 3 temperatures */ 506 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 507 char *buf) 508 { 509 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 510 int nr = sensor_attr->index; 511 512 struct it87_data *data = it87_update_device(dev); 513 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 514 } 515 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 516 char *buf) 517 { 518 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 519 int nr = sensor_attr->index; 520 521 struct it87_data *data = it87_update_device(dev); 522 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); 523 } 524 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 525 char *buf) 526 { 527 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 528 int nr = sensor_attr->index; 529 530 struct it87_data *data = it87_update_device(dev); 531 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); 532 } 533 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 534 const char *buf, size_t count) 535 { 536 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 537 int nr = sensor_attr->index; 538 539 struct it87_data *data = dev_get_drvdata(dev); 540 long val; 541 542 if (strict_strtol(buf, 10, &val) < 0) 543 return -EINVAL; 544 545 mutex_lock(&data->update_lock); 546 data->temp_high[nr] = TEMP_TO_REG(val); 547 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); 548 mutex_unlock(&data->update_lock); 549 return count; 550 } 551 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 552 const char *buf, size_t count) 553 { 554 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 555 int nr = sensor_attr->index; 556 557 struct it87_data *data = dev_get_drvdata(dev); 558 long val; 559 560 if (strict_strtol(buf, 10, &val) < 0) 561 return -EINVAL; 562 563 mutex_lock(&data->update_lock); 564 data->temp_low[nr] = TEMP_TO_REG(val); 565 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); 566 mutex_unlock(&data->update_lock); 567 return count; 568 } 569 #define show_temp_offset(offset) \ 570 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 571 show_temp, NULL, offset - 1); \ 572 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 573 show_temp_max, set_temp_max, offset - 1); \ 574 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 575 show_temp_min, set_temp_min, offset - 1); 576 577 show_temp_offset(1); 578 show_temp_offset(2); 579 show_temp_offset(3); 580 581 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, 582 char *buf) 583 { 584 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 585 int nr = sensor_attr->index; 586 587 struct it87_data *data = it87_update_device(dev); 588 u8 reg = data->sensor; /* In case the value is updated while 589 we use it */ 590 591 if (reg & (1 << nr)) 592 return sprintf(buf, "3\n"); /* thermal diode */ 593 if (reg & (8 << nr)) 594 return sprintf(buf, "4\n"); /* thermistor */ 595 return sprintf(buf, "0\n"); /* disabled */ 596 } 597 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, 598 const char *buf, size_t count) 599 { 600 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 601 int nr = sensor_attr->index; 602 603 struct it87_data *data = dev_get_drvdata(dev); 604 long val; 605 u8 reg; 606 607 if (strict_strtol(buf, 10, &val) < 0) 608 return -EINVAL; 609 610 reg = it87_read_value(data, IT87_REG_TEMP_ENABLE); 611 reg &= ~(1 << nr); 612 reg &= ~(8 << nr); 613 if (val == 2) { /* backwards compatibility */ 614 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 " 615 "instead\n"); 616 val = 4; 617 } 618 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */ 619 if (val == 3) 620 reg |= 1 << nr; 621 else if (val == 4) 622 reg |= 8 << nr; 623 else if (val != 0) 624 return -EINVAL; 625 626 mutex_lock(&data->update_lock); 627 data->sensor = reg; 628 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor); 629 data->valid = 0; /* Force cache refresh */ 630 mutex_unlock(&data->update_lock); 631 return count; 632 } 633 #define show_sensor_offset(offset) \ 634 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ 635 show_sensor, set_sensor, offset - 1); 636 637 show_sensor_offset(1); 638 show_sensor_offset(2); 639 show_sensor_offset(3); 640 641 /* 3 Fans */ 642 643 static int pwm_mode(const struct it87_data *data, int nr) 644 { 645 int ctrl = data->fan_main_ctrl & (1 << nr); 646 647 if (ctrl == 0) /* Full speed */ 648 return 0; 649 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */ 650 return 2; 651 else /* Manual mode */ 652 return 1; 653 } 654 655 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 656 char *buf) 657 { 658 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 659 int nr = sensor_attr->index; 660 661 struct it87_data *data = it87_update_device(dev); 662 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 663 DIV_FROM_REG(data->fan_div[nr]))); 664 } 665 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 666 char *buf) 667 { 668 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 669 int nr = sensor_attr->index; 670 671 struct it87_data *data = it87_update_device(dev); 672 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 673 DIV_FROM_REG(data->fan_div[nr]))); 674 } 675 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 676 char *buf) 677 { 678 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 679 int nr = sensor_attr->index; 680 681 struct it87_data *data = it87_update_device(dev); 682 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 683 } 684 static ssize_t show_pwm_enable(struct device *dev, 685 struct device_attribute *attr, char *buf) 686 { 687 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 688 int nr = sensor_attr->index; 689 690 struct it87_data *data = it87_update_device(dev); 691 return sprintf(buf, "%d\n", pwm_mode(data, nr)); 692 } 693 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 694 char *buf) 695 { 696 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 697 int nr = sensor_attr->index; 698 699 struct it87_data *data = it87_update_device(dev); 700 return sprintf(buf, "%d\n", 701 pwm_from_reg(data, data->pwm_duty[nr])); 702 } 703 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr, 704 char *buf) 705 { 706 struct it87_data *data = it87_update_device(dev); 707 int index = (data->fan_ctl >> 4) & 0x07; 708 709 return sprintf(buf, "%u\n", pwm_freq[index]); 710 } 711 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 712 const char *buf, size_t count) 713 { 714 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 715 int nr = sensor_attr->index; 716 717 struct it87_data *data = dev_get_drvdata(dev); 718 long val; 719 u8 reg; 720 721 if (strict_strtol(buf, 10, &val) < 0) 722 return -EINVAL; 723 724 mutex_lock(&data->update_lock); 725 reg = it87_read_value(data, IT87_REG_FAN_DIV); 726 switch (nr) { 727 case 0: 728 data->fan_div[nr] = reg & 0x07; 729 break; 730 case 1: 731 data->fan_div[nr] = (reg >> 3) & 0x07; 732 break; 733 case 2: 734 data->fan_div[nr] = (reg & 0x40) ? 3 : 1; 735 break; 736 } 737 738 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 739 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 740 mutex_unlock(&data->update_lock); 741 return count; 742 } 743 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 744 const char *buf, size_t count) 745 { 746 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 747 int nr = sensor_attr->index; 748 749 struct it87_data *data = dev_get_drvdata(dev); 750 unsigned long val; 751 int min; 752 u8 old; 753 754 if (strict_strtoul(buf, 10, &val) < 0) 755 return -EINVAL; 756 757 mutex_lock(&data->update_lock); 758 old = it87_read_value(data, IT87_REG_FAN_DIV); 759 760 /* Save fan min limit */ 761 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 762 763 switch (nr) { 764 case 0: 765 case 1: 766 data->fan_div[nr] = DIV_TO_REG(val); 767 break; 768 case 2: 769 if (val < 8) 770 data->fan_div[nr] = 1; 771 else 772 data->fan_div[nr] = 3; 773 } 774 val = old & 0x80; 775 val |= (data->fan_div[0] & 0x07); 776 val |= (data->fan_div[1] & 0x07) << 3; 777 if (data->fan_div[2] == 3) 778 val |= 0x1 << 6; 779 it87_write_value(data, IT87_REG_FAN_DIV, val); 780 781 /* Restore fan min limit */ 782 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 783 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 784 785 mutex_unlock(&data->update_lock); 786 return count; 787 } 788 789 /* Returns 0 if OK, -EINVAL otherwise */ 790 static int check_trip_points(struct device *dev, int nr) 791 { 792 const struct it87_data *data = dev_get_drvdata(dev); 793 int i, err = 0; 794 795 if (has_old_autopwm(data)) { 796 for (i = 0; i < 3; i++) { 797 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1]) 798 err = -EINVAL; 799 } 800 for (i = 0; i < 2; i++) { 801 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1]) 802 err = -EINVAL; 803 } 804 } 805 806 if (err) { 807 dev_err(dev, "Inconsistent trip points, not switching to " 808 "automatic mode\n"); 809 dev_err(dev, "Adjust the trip points and try again\n"); 810 } 811 return err; 812 } 813 814 static ssize_t set_pwm_enable(struct device *dev, 815 struct device_attribute *attr, const char *buf, size_t count) 816 { 817 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 818 int nr = sensor_attr->index; 819 820 struct it87_data *data = dev_get_drvdata(dev); 821 long val; 822 823 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2) 824 return -EINVAL; 825 826 /* Check trip points before switching to automatic mode */ 827 if (val == 2) { 828 if (check_trip_points(dev, nr) < 0) 829 return -EINVAL; 830 } 831 832 mutex_lock(&data->update_lock); 833 834 if (val == 0) { 835 int tmp; 836 /* make sure the fan is on when in on/off mode */ 837 tmp = it87_read_value(data, IT87_REG_FAN_CTL); 838 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr)); 839 /* set on/off mode */ 840 data->fan_main_ctrl &= ~(1 << nr); 841 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 842 data->fan_main_ctrl); 843 } else { 844 if (val == 1) /* Manual mode */ 845 data->pwm_ctrl[nr] = data->type == it8721 ? 846 data->pwm_temp_map[nr] : 847 data->pwm_duty[nr]; 848 else /* Automatic mode */ 849 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 850 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 851 /* set SmartGuardian mode */ 852 data->fan_main_ctrl |= (1 << nr); 853 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 854 data->fan_main_ctrl); 855 } 856 857 mutex_unlock(&data->update_lock); 858 return count; 859 } 860 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 861 const char *buf, size_t count) 862 { 863 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 864 int nr = sensor_attr->index; 865 866 struct it87_data *data = dev_get_drvdata(dev); 867 long val; 868 869 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255) 870 return -EINVAL; 871 872 mutex_lock(&data->update_lock); 873 if (data->type == it8721) { 874 /* If we are in automatic mode, the PWM duty cycle register 875 * is read-only so we can't write the value */ 876 if (data->pwm_ctrl[nr] & 0x80) { 877 mutex_unlock(&data->update_lock); 878 return -EBUSY; 879 } 880 data->pwm_duty[nr] = pwm_to_reg(data, val); 881 it87_write_value(data, IT87_REG_PWM_DUTY(nr), 882 data->pwm_duty[nr]); 883 } else { 884 data->pwm_duty[nr] = pwm_to_reg(data, val); 885 /* If we are in manual mode, write the duty cycle immediately; 886 * otherwise, just store it for later use. */ 887 if (!(data->pwm_ctrl[nr] & 0x80)) { 888 data->pwm_ctrl[nr] = data->pwm_duty[nr]; 889 it87_write_value(data, IT87_REG_PWM(nr), 890 data->pwm_ctrl[nr]); 891 } 892 } 893 mutex_unlock(&data->update_lock); 894 return count; 895 } 896 static ssize_t set_pwm_freq(struct device *dev, 897 struct device_attribute *attr, const char *buf, size_t count) 898 { 899 struct it87_data *data = dev_get_drvdata(dev); 900 unsigned long val; 901 int i; 902 903 if (strict_strtoul(buf, 10, &val) < 0) 904 return -EINVAL; 905 906 /* Search for the nearest available frequency */ 907 for (i = 0; i < 7; i++) { 908 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2) 909 break; 910 } 911 912 mutex_lock(&data->update_lock); 913 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f; 914 data->fan_ctl |= i << 4; 915 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl); 916 mutex_unlock(&data->update_lock); 917 918 return count; 919 } 920 static ssize_t show_pwm_temp_map(struct device *dev, 921 struct device_attribute *attr, char *buf) 922 { 923 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 924 int nr = sensor_attr->index; 925 926 struct it87_data *data = it87_update_device(dev); 927 int map; 928 929 if (data->pwm_temp_map[nr] < 3) 930 map = 1 << data->pwm_temp_map[nr]; 931 else 932 map = 0; /* Should never happen */ 933 return sprintf(buf, "%d\n", map); 934 } 935 static ssize_t set_pwm_temp_map(struct device *dev, 936 struct device_attribute *attr, const char *buf, size_t count) 937 { 938 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 939 int nr = sensor_attr->index; 940 941 struct it87_data *data = dev_get_drvdata(dev); 942 long val; 943 u8 reg; 944 945 /* This check can go away if we ever support automatic fan speed 946 control on newer chips. */ 947 if (!has_old_autopwm(data)) { 948 dev_notice(dev, "Mapping change disabled for safety reasons\n"); 949 return -EINVAL; 950 } 951 952 if (strict_strtol(buf, 10, &val) < 0) 953 return -EINVAL; 954 955 switch (val) { 956 case (1 << 0): 957 reg = 0x00; 958 break; 959 case (1 << 1): 960 reg = 0x01; 961 break; 962 case (1 << 2): 963 reg = 0x02; 964 break; 965 default: 966 return -EINVAL; 967 } 968 969 mutex_lock(&data->update_lock); 970 data->pwm_temp_map[nr] = reg; 971 /* If we are in automatic mode, write the temp mapping immediately; 972 * otherwise, just store it for later use. */ 973 if (data->pwm_ctrl[nr] & 0x80) { 974 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 975 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 976 } 977 mutex_unlock(&data->update_lock); 978 return count; 979 } 980 981 static ssize_t show_auto_pwm(struct device *dev, 982 struct device_attribute *attr, char *buf) 983 { 984 struct it87_data *data = it87_update_device(dev); 985 struct sensor_device_attribute_2 *sensor_attr = 986 to_sensor_dev_attr_2(attr); 987 int nr = sensor_attr->nr; 988 int point = sensor_attr->index; 989 990 return sprintf(buf, "%d\n", 991 pwm_from_reg(data, data->auto_pwm[nr][point])); 992 } 993 994 static ssize_t set_auto_pwm(struct device *dev, 995 struct device_attribute *attr, const char *buf, size_t count) 996 { 997 struct it87_data *data = dev_get_drvdata(dev); 998 struct sensor_device_attribute_2 *sensor_attr = 999 to_sensor_dev_attr_2(attr); 1000 int nr = sensor_attr->nr; 1001 int point = sensor_attr->index; 1002 long val; 1003 1004 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255) 1005 return -EINVAL; 1006 1007 mutex_lock(&data->update_lock); 1008 data->auto_pwm[nr][point] = pwm_to_reg(data, val); 1009 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point), 1010 data->auto_pwm[nr][point]); 1011 mutex_unlock(&data->update_lock); 1012 return count; 1013 } 1014 1015 static ssize_t show_auto_temp(struct device *dev, 1016 struct device_attribute *attr, char *buf) 1017 { 1018 struct it87_data *data = it87_update_device(dev); 1019 struct sensor_device_attribute_2 *sensor_attr = 1020 to_sensor_dev_attr_2(attr); 1021 int nr = sensor_attr->nr; 1022 int point = sensor_attr->index; 1023 1024 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point])); 1025 } 1026 1027 static ssize_t set_auto_temp(struct device *dev, 1028 struct device_attribute *attr, const char *buf, size_t count) 1029 { 1030 struct it87_data *data = dev_get_drvdata(dev); 1031 struct sensor_device_attribute_2 *sensor_attr = 1032 to_sensor_dev_attr_2(attr); 1033 int nr = sensor_attr->nr; 1034 int point = sensor_attr->index; 1035 long val; 1036 1037 if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000) 1038 return -EINVAL; 1039 1040 mutex_lock(&data->update_lock); 1041 data->auto_temp[nr][point] = TEMP_TO_REG(val); 1042 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point), 1043 data->auto_temp[nr][point]); 1044 mutex_unlock(&data->update_lock); 1045 return count; 1046 } 1047 1048 #define show_fan_offset(offset) \ 1049 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 1050 show_fan, NULL, offset - 1); \ 1051 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 1052 show_fan_min, set_fan_min, offset - 1); \ 1053 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 1054 show_fan_div, set_fan_div, offset - 1); 1055 1056 show_fan_offset(1); 1057 show_fan_offset(2); 1058 show_fan_offset(3); 1059 1060 #define show_pwm_offset(offset) \ 1061 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 1062 show_pwm_enable, set_pwm_enable, offset - 1); \ 1063 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 1064 show_pwm, set_pwm, offset - 1); \ 1065 static DEVICE_ATTR(pwm##offset##_freq, \ 1066 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \ 1067 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \ 1068 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \ 1069 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \ 1070 offset - 1); \ 1071 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \ 1072 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1073 offset - 1, 0); \ 1074 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \ 1075 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1076 offset - 1, 1); \ 1077 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \ 1078 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1079 offset - 1, 2); \ 1080 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \ 1081 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \ 1082 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \ 1083 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1084 offset - 1, 1); \ 1085 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \ 1086 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1087 offset - 1, 0); \ 1088 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \ 1089 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1090 offset - 1, 2); \ 1091 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \ 1092 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1093 offset - 1, 3); \ 1094 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \ 1095 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1096 offset - 1, 4); 1097 1098 show_pwm_offset(1); 1099 show_pwm_offset(2); 1100 show_pwm_offset(3); 1101 1102 /* A different set of callbacks for 16-bit fans */ 1103 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr, 1104 char *buf) 1105 { 1106 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1107 int nr = sensor_attr->index; 1108 struct it87_data *data = it87_update_device(dev); 1109 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr])); 1110 } 1111 1112 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr, 1113 char *buf) 1114 { 1115 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1116 int nr = sensor_attr->index; 1117 struct it87_data *data = it87_update_device(dev); 1118 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr])); 1119 } 1120 1121 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr, 1122 const char *buf, size_t count) 1123 { 1124 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1125 int nr = sensor_attr->index; 1126 struct it87_data *data = dev_get_drvdata(dev); 1127 long val; 1128 1129 if (strict_strtol(buf, 10, &val) < 0) 1130 return -EINVAL; 1131 1132 mutex_lock(&data->update_lock); 1133 data->fan_min[nr] = FAN16_TO_REG(val); 1134 it87_write_value(data, IT87_REG_FAN_MIN[nr], 1135 data->fan_min[nr] & 0xff); 1136 it87_write_value(data, IT87_REG_FANX_MIN[nr], 1137 data->fan_min[nr] >> 8); 1138 mutex_unlock(&data->update_lock); 1139 return count; 1140 } 1141 1142 /* We want to use the same sysfs file names as 8-bit fans, but we need 1143 different variable names, so we have to use SENSOR_ATTR instead of 1144 SENSOR_DEVICE_ATTR. */ 1145 #define show_fan16_offset(offset) \ 1146 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \ 1147 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \ 1148 show_fan16, NULL, offset - 1); \ 1149 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \ 1150 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 1151 show_fan16_min, set_fan16_min, offset - 1) 1152 1153 show_fan16_offset(1); 1154 show_fan16_offset(2); 1155 show_fan16_offset(3); 1156 show_fan16_offset(4); 1157 show_fan16_offset(5); 1158 1159 /* Alarms */ 1160 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 1161 char *buf) 1162 { 1163 struct it87_data *data = it87_update_device(dev); 1164 return sprintf(buf, "%u\n", data->alarms); 1165 } 1166 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 1167 1168 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 1169 char *buf) 1170 { 1171 int bitnr = to_sensor_dev_attr(attr)->index; 1172 struct it87_data *data = it87_update_device(dev); 1173 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 1174 } 1175 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8); 1176 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9); 1177 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10); 1178 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11); 1179 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12); 1180 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13); 1181 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14); 1182 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15); 1183 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0); 1184 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1); 1185 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2); 1186 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3); 1187 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6); 1188 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16); 1189 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17); 1190 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18); 1191 1192 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 1193 char *buf) 1194 { 1195 int bitnr = to_sensor_dev_attr(attr)->index; 1196 struct it87_data *data = it87_update_device(dev); 1197 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1); 1198 } 1199 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 1200 const char *buf, size_t count) 1201 { 1202 int bitnr = to_sensor_dev_attr(attr)->index; 1203 struct it87_data *data = dev_get_drvdata(dev); 1204 long val; 1205 1206 if (strict_strtol(buf, 10, &val) < 0 1207 || (val != 0 && val != 1)) 1208 return -EINVAL; 1209 1210 mutex_lock(&data->update_lock); 1211 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE); 1212 if (val) 1213 data->beeps |= (1 << bitnr); 1214 else 1215 data->beeps &= ~(1 << bitnr); 1216 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps); 1217 mutex_unlock(&data->update_lock); 1218 return count; 1219 } 1220 1221 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, 1222 show_beep, set_beep, 1); 1223 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1); 1224 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1); 1225 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1); 1226 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1); 1227 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1); 1228 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1); 1229 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1); 1230 /* fanX_beep writability is set later */ 1231 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0); 1232 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0); 1233 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0); 1234 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0); 1235 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0); 1236 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, 1237 show_beep, set_beep, 2); 1238 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2); 1239 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2); 1240 1241 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr, 1242 char *buf) 1243 { 1244 struct it87_data *data = dev_get_drvdata(dev); 1245 return sprintf(buf, "%u\n", data->vrm); 1246 } 1247 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr, 1248 const char *buf, size_t count) 1249 { 1250 struct it87_data *data = dev_get_drvdata(dev); 1251 unsigned long val; 1252 1253 if (strict_strtoul(buf, 10, &val) < 0) 1254 return -EINVAL; 1255 1256 data->vrm = val; 1257 1258 return count; 1259 } 1260 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 1261 1262 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr, 1263 char *buf) 1264 { 1265 struct it87_data *data = it87_update_device(dev); 1266 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 1267 } 1268 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 1269 1270 static ssize_t show_label(struct device *dev, struct device_attribute *attr, 1271 char *buf) 1272 { 1273 static const char *labels[] = { 1274 "+5V", 1275 "5VSB", 1276 "Vbat", 1277 }; 1278 static const char *labels_it8721[] = { 1279 "+3.3V", 1280 "3VSB", 1281 "Vbat", 1282 }; 1283 struct it87_data *data = dev_get_drvdata(dev); 1284 int nr = to_sensor_dev_attr(attr)->index; 1285 1286 return sprintf(buf, "%s\n", data->type == it8721 ? labels_it8721[nr] 1287 : labels[nr]); 1288 } 1289 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0); 1290 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1); 1291 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2); 1292 1293 static ssize_t show_name(struct device *dev, struct device_attribute 1294 *devattr, char *buf) 1295 { 1296 struct it87_data *data = dev_get_drvdata(dev); 1297 return sprintf(buf, "%s\n", data->name); 1298 } 1299 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 1300 1301 static struct attribute *it87_attributes[] = { 1302 &sensor_dev_attr_in0_input.dev_attr.attr, 1303 &sensor_dev_attr_in1_input.dev_attr.attr, 1304 &sensor_dev_attr_in2_input.dev_attr.attr, 1305 &sensor_dev_attr_in3_input.dev_attr.attr, 1306 &sensor_dev_attr_in4_input.dev_attr.attr, 1307 &sensor_dev_attr_in5_input.dev_attr.attr, 1308 &sensor_dev_attr_in6_input.dev_attr.attr, 1309 &sensor_dev_attr_in7_input.dev_attr.attr, 1310 &sensor_dev_attr_in8_input.dev_attr.attr, 1311 &sensor_dev_attr_in0_min.dev_attr.attr, 1312 &sensor_dev_attr_in1_min.dev_attr.attr, 1313 &sensor_dev_attr_in2_min.dev_attr.attr, 1314 &sensor_dev_attr_in3_min.dev_attr.attr, 1315 &sensor_dev_attr_in4_min.dev_attr.attr, 1316 &sensor_dev_attr_in5_min.dev_attr.attr, 1317 &sensor_dev_attr_in6_min.dev_attr.attr, 1318 &sensor_dev_attr_in7_min.dev_attr.attr, 1319 &sensor_dev_attr_in0_max.dev_attr.attr, 1320 &sensor_dev_attr_in1_max.dev_attr.attr, 1321 &sensor_dev_attr_in2_max.dev_attr.attr, 1322 &sensor_dev_attr_in3_max.dev_attr.attr, 1323 &sensor_dev_attr_in4_max.dev_attr.attr, 1324 &sensor_dev_attr_in5_max.dev_attr.attr, 1325 &sensor_dev_attr_in6_max.dev_attr.attr, 1326 &sensor_dev_attr_in7_max.dev_attr.attr, 1327 &sensor_dev_attr_in0_alarm.dev_attr.attr, 1328 &sensor_dev_attr_in1_alarm.dev_attr.attr, 1329 &sensor_dev_attr_in2_alarm.dev_attr.attr, 1330 &sensor_dev_attr_in3_alarm.dev_attr.attr, 1331 &sensor_dev_attr_in4_alarm.dev_attr.attr, 1332 &sensor_dev_attr_in5_alarm.dev_attr.attr, 1333 &sensor_dev_attr_in6_alarm.dev_attr.attr, 1334 &sensor_dev_attr_in7_alarm.dev_attr.attr, 1335 1336 &sensor_dev_attr_temp1_input.dev_attr.attr, 1337 &sensor_dev_attr_temp2_input.dev_attr.attr, 1338 &sensor_dev_attr_temp3_input.dev_attr.attr, 1339 &sensor_dev_attr_temp1_max.dev_attr.attr, 1340 &sensor_dev_attr_temp2_max.dev_attr.attr, 1341 &sensor_dev_attr_temp3_max.dev_attr.attr, 1342 &sensor_dev_attr_temp1_min.dev_attr.attr, 1343 &sensor_dev_attr_temp2_min.dev_attr.attr, 1344 &sensor_dev_attr_temp3_min.dev_attr.attr, 1345 &sensor_dev_attr_temp1_type.dev_attr.attr, 1346 &sensor_dev_attr_temp2_type.dev_attr.attr, 1347 &sensor_dev_attr_temp3_type.dev_attr.attr, 1348 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1349 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1350 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1351 1352 &dev_attr_alarms.attr, 1353 &dev_attr_name.attr, 1354 NULL 1355 }; 1356 1357 static const struct attribute_group it87_group = { 1358 .attrs = it87_attributes, 1359 }; 1360 1361 static struct attribute *it87_attributes_beep[] = { 1362 &sensor_dev_attr_in0_beep.dev_attr.attr, 1363 &sensor_dev_attr_in1_beep.dev_attr.attr, 1364 &sensor_dev_attr_in2_beep.dev_attr.attr, 1365 &sensor_dev_attr_in3_beep.dev_attr.attr, 1366 &sensor_dev_attr_in4_beep.dev_attr.attr, 1367 &sensor_dev_attr_in5_beep.dev_attr.attr, 1368 &sensor_dev_attr_in6_beep.dev_attr.attr, 1369 &sensor_dev_attr_in7_beep.dev_attr.attr, 1370 1371 &sensor_dev_attr_temp1_beep.dev_attr.attr, 1372 &sensor_dev_attr_temp2_beep.dev_attr.attr, 1373 &sensor_dev_attr_temp3_beep.dev_attr.attr, 1374 NULL 1375 }; 1376 1377 static const struct attribute_group it87_group_beep = { 1378 .attrs = it87_attributes_beep, 1379 }; 1380 1381 static struct attribute *it87_attributes_fan16[5][3+1] = { { 1382 &sensor_dev_attr_fan1_input16.dev_attr.attr, 1383 &sensor_dev_attr_fan1_min16.dev_attr.attr, 1384 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1385 NULL 1386 }, { 1387 &sensor_dev_attr_fan2_input16.dev_attr.attr, 1388 &sensor_dev_attr_fan2_min16.dev_attr.attr, 1389 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1390 NULL 1391 }, { 1392 &sensor_dev_attr_fan3_input16.dev_attr.attr, 1393 &sensor_dev_attr_fan3_min16.dev_attr.attr, 1394 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1395 NULL 1396 }, { 1397 &sensor_dev_attr_fan4_input16.dev_attr.attr, 1398 &sensor_dev_attr_fan4_min16.dev_attr.attr, 1399 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1400 NULL 1401 }, { 1402 &sensor_dev_attr_fan5_input16.dev_attr.attr, 1403 &sensor_dev_attr_fan5_min16.dev_attr.attr, 1404 &sensor_dev_attr_fan5_alarm.dev_attr.attr, 1405 NULL 1406 } }; 1407 1408 static const struct attribute_group it87_group_fan16[5] = { 1409 { .attrs = it87_attributes_fan16[0] }, 1410 { .attrs = it87_attributes_fan16[1] }, 1411 { .attrs = it87_attributes_fan16[2] }, 1412 { .attrs = it87_attributes_fan16[3] }, 1413 { .attrs = it87_attributes_fan16[4] }, 1414 }; 1415 1416 static struct attribute *it87_attributes_fan[3][4+1] = { { 1417 &sensor_dev_attr_fan1_input.dev_attr.attr, 1418 &sensor_dev_attr_fan1_min.dev_attr.attr, 1419 &sensor_dev_attr_fan1_div.dev_attr.attr, 1420 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1421 NULL 1422 }, { 1423 &sensor_dev_attr_fan2_input.dev_attr.attr, 1424 &sensor_dev_attr_fan2_min.dev_attr.attr, 1425 &sensor_dev_attr_fan2_div.dev_attr.attr, 1426 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1427 NULL 1428 }, { 1429 &sensor_dev_attr_fan3_input.dev_attr.attr, 1430 &sensor_dev_attr_fan3_min.dev_attr.attr, 1431 &sensor_dev_attr_fan3_div.dev_attr.attr, 1432 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1433 NULL 1434 } }; 1435 1436 static const struct attribute_group it87_group_fan[3] = { 1437 { .attrs = it87_attributes_fan[0] }, 1438 { .attrs = it87_attributes_fan[1] }, 1439 { .attrs = it87_attributes_fan[2] }, 1440 }; 1441 1442 static const struct attribute_group * 1443 it87_get_fan_group(const struct it87_data *data) 1444 { 1445 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan; 1446 } 1447 1448 static struct attribute *it87_attributes_pwm[3][4+1] = { { 1449 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1450 &sensor_dev_attr_pwm1.dev_attr.attr, 1451 &dev_attr_pwm1_freq.attr, 1452 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, 1453 NULL 1454 }, { 1455 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1456 &sensor_dev_attr_pwm2.dev_attr.attr, 1457 &dev_attr_pwm2_freq.attr, 1458 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr, 1459 NULL 1460 }, { 1461 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1462 &sensor_dev_attr_pwm3.dev_attr.attr, 1463 &dev_attr_pwm3_freq.attr, 1464 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, 1465 NULL 1466 } }; 1467 1468 static const struct attribute_group it87_group_pwm[3] = { 1469 { .attrs = it87_attributes_pwm[0] }, 1470 { .attrs = it87_attributes_pwm[1] }, 1471 { .attrs = it87_attributes_pwm[2] }, 1472 }; 1473 1474 static struct attribute *it87_attributes_autopwm[3][9+1] = { { 1475 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1476 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1477 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 1478 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 1479 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 1480 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 1481 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 1482 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 1483 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 1484 NULL 1485 }, { 1486 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, 1487 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, 1488 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr, 1489 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr, 1490 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr, 1491 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr, 1492 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr, 1493 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr, 1494 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr, 1495 NULL 1496 }, { 1497 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, 1498 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, 1499 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr, 1500 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr, 1501 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr, 1502 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr, 1503 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr, 1504 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr, 1505 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr, 1506 NULL 1507 } }; 1508 1509 static const struct attribute_group it87_group_autopwm[3] = { 1510 { .attrs = it87_attributes_autopwm[0] }, 1511 { .attrs = it87_attributes_autopwm[1] }, 1512 { .attrs = it87_attributes_autopwm[2] }, 1513 }; 1514 1515 static struct attribute *it87_attributes_fan_beep[] = { 1516 &sensor_dev_attr_fan1_beep.dev_attr.attr, 1517 &sensor_dev_attr_fan2_beep.dev_attr.attr, 1518 &sensor_dev_attr_fan3_beep.dev_attr.attr, 1519 &sensor_dev_attr_fan4_beep.dev_attr.attr, 1520 &sensor_dev_attr_fan5_beep.dev_attr.attr, 1521 }; 1522 1523 static struct attribute *it87_attributes_vid[] = { 1524 &dev_attr_vrm.attr, 1525 &dev_attr_cpu0_vid.attr, 1526 NULL 1527 }; 1528 1529 static const struct attribute_group it87_group_vid = { 1530 .attrs = it87_attributes_vid, 1531 }; 1532 1533 static struct attribute *it87_attributes_label[] = { 1534 &sensor_dev_attr_in3_label.dev_attr.attr, 1535 &sensor_dev_attr_in7_label.dev_attr.attr, 1536 &sensor_dev_attr_in8_label.dev_attr.attr, 1537 NULL 1538 }; 1539 1540 static const struct attribute_group it87_group_label = { 1541 .attrs = it87_attributes_label, 1542 }; 1543 1544 /* SuperIO detection - will change isa_address if a chip is found */ 1545 static int __init it87_find(unsigned short *address, 1546 struct it87_sio_data *sio_data) 1547 { 1548 int err; 1549 u16 chip_type; 1550 const char *board_vendor, *board_name; 1551 1552 err = superio_enter(); 1553 if (err) 1554 return err; 1555 1556 err = -ENODEV; 1557 chip_type = force_id ? force_id : superio_inw(DEVID); 1558 1559 switch (chip_type) { 1560 case IT8705F_DEVID: 1561 sio_data->type = it87; 1562 break; 1563 case IT8712F_DEVID: 1564 sio_data->type = it8712; 1565 break; 1566 case IT8716F_DEVID: 1567 case IT8726F_DEVID: 1568 sio_data->type = it8716; 1569 break; 1570 case IT8718F_DEVID: 1571 sio_data->type = it8718; 1572 break; 1573 case IT8720F_DEVID: 1574 sio_data->type = it8720; 1575 break; 1576 case IT8721F_DEVID: 1577 sio_data->type = it8721; 1578 break; 1579 case 0xffff: /* No device at all */ 1580 goto exit; 1581 default: 1582 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type); 1583 goto exit; 1584 } 1585 1586 superio_select(PME); 1587 if (!(superio_inb(IT87_ACT_REG) & 0x01)) { 1588 pr_info("Device not activated, skipping\n"); 1589 goto exit; 1590 } 1591 1592 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); 1593 if (*address == 0) { 1594 pr_info("Base address not set, skipping\n"); 1595 goto exit; 1596 } 1597 1598 err = 0; 1599 sio_data->revision = superio_inb(DEVREV) & 0x0f; 1600 pr_info("Found IT%04xF chip at 0x%x, revision %d\n", 1601 chip_type, *address, sio_data->revision); 1602 1603 /* in8 (Vbat) is always internal */ 1604 sio_data->internal = (1 << 2); 1605 1606 /* Read GPIO config and VID value from LDN 7 (GPIO) */ 1607 if (sio_data->type == it87) { 1608 /* The IT8705F doesn't have VID pins at all */ 1609 sio_data->skip_vid = 1; 1610 1611 /* The IT8705F has a different LD number for GPIO */ 1612 superio_select(5); 1613 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1614 } else { 1615 int reg; 1616 1617 superio_select(GPIO); 1618 1619 reg = superio_inb(IT87_SIO_GPIO3_REG); 1620 if (sio_data->type == it8721) { 1621 /* The IT8721F/IT8758E doesn't have VID pins at all */ 1622 sio_data->skip_vid = 1; 1623 } else { 1624 /* We need at least 4 VID pins */ 1625 if (reg & 0x0f) { 1626 pr_info("VID is disabled (pins used for GPIO)\n"); 1627 sio_data->skip_vid = 1; 1628 } 1629 } 1630 1631 /* Check if fan3 is there or not */ 1632 if (reg & (1 << 6)) 1633 sio_data->skip_pwm |= (1 << 2); 1634 if (reg & (1 << 7)) 1635 sio_data->skip_fan |= (1 << 2); 1636 1637 /* Check if fan2 is there or not */ 1638 reg = superio_inb(IT87_SIO_GPIO5_REG); 1639 if (reg & (1 << 1)) 1640 sio_data->skip_pwm |= (1 << 1); 1641 if (reg & (1 << 2)) 1642 sio_data->skip_fan |= (1 << 1); 1643 1644 if ((sio_data->type == it8718 || sio_data->type == it8720) 1645 && !(sio_data->skip_vid)) 1646 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG); 1647 1648 reg = superio_inb(IT87_SIO_PINX2_REG); 1649 /* 1650 * The IT8720F has no VIN7 pin, so VCCH should always be 1651 * routed internally to VIN7 with an internal divider. 1652 * Curiously, there still is a configuration bit to control 1653 * this, which means it can be set incorrectly. And even 1654 * more curiously, many boards out there are improperly 1655 * configured, even though the IT8720F datasheet claims 1656 * that the internal routing of VCCH to VIN7 is the default 1657 * setting. So we force the internal routing in this case. 1658 */ 1659 if (sio_data->type == it8720 && !(reg & (1 << 1))) { 1660 reg |= (1 << 1); 1661 superio_outb(IT87_SIO_PINX2_REG, reg); 1662 pr_notice("Routing internal VCCH to in7\n"); 1663 } 1664 if (reg & (1 << 0)) 1665 sio_data->internal |= (1 << 0); 1666 if ((reg & (1 << 1)) || sio_data->type == it8721) 1667 sio_data->internal |= (1 << 1); 1668 1669 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1670 } 1671 if (sio_data->beep_pin) 1672 pr_info("Beeping is supported\n"); 1673 1674 /* Disable specific features based on DMI strings */ 1675 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR); 1676 board_name = dmi_get_system_info(DMI_BOARD_NAME); 1677 if (board_vendor && board_name) { 1678 if (strcmp(board_vendor, "nVIDIA") == 0 1679 && strcmp(board_name, "FN68PT") == 0) { 1680 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not 1681 connected to a fan, but to something else. One user 1682 has reported instant system power-off when changing 1683 the PWM2 duty cycle, so we disable it. 1684 I use the board name string as the trigger in case 1685 the same board is ever used in other systems. */ 1686 pr_info("Disabling pwm2 due to hardware constraints\n"); 1687 sio_data->skip_pwm = (1 << 1); 1688 } 1689 } 1690 1691 exit: 1692 superio_exit(); 1693 return err; 1694 } 1695 1696 static void it87_remove_files(struct device *dev) 1697 { 1698 struct it87_data *data = platform_get_drvdata(pdev); 1699 struct it87_sio_data *sio_data = dev->platform_data; 1700 const struct attribute_group *fan_group = it87_get_fan_group(data); 1701 int i; 1702 1703 sysfs_remove_group(&dev->kobj, &it87_group); 1704 if (sio_data->beep_pin) 1705 sysfs_remove_group(&dev->kobj, &it87_group_beep); 1706 for (i = 0; i < 5; i++) { 1707 if (!(data->has_fan & (1 << i))) 1708 continue; 1709 sysfs_remove_group(&dev->kobj, &fan_group[i]); 1710 if (sio_data->beep_pin) 1711 sysfs_remove_file(&dev->kobj, 1712 it87_attributes_fan_beep[i]); 1713 } 1714 for (i = 0; i < 3; i++) { 1715 if (sio_data->skip_pwm & (1 << 0)) 1716 continue; 1717 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]); 1718 if (has_old_autopwm(data)) 1719 sysfs_remove_group(&dev->kobj, 1720 &it87_group_autopwm[i]); 1721 } 1722 if (!sio_data->skip_vid) 1723 sysfs_remove_group(&dev->kobj, &it87_group_vid); 1724 sysfs_remove_group(&dev->kobj, &it87_group_label); 1725 } 1726 1727 static int __devinit it87_probe(struct platform_device *pdev) 1728 { 1729 struct it87_data *data; 1730 struct resource *res; 1731 struct device *dev = &pdev->dev; 1732 struct it87_sio_data *sio_data = dev->platform_data; 1733 const struct attribute_group *fan_group; 1734 int err = 0, i; 1735 int enable_pwm_interface; 1736 int fan_beep_need_rw; 1737 static const char *names[] = { 1738 "it87", 1739 "it8712", 1740 "it8716", 1741 "it8718", 1742 "it8720", 1743 "it8721", 1744 }; 1745 1746 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1747 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) { 1748 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", 1749 (unsigned long)res->start, 1750 (unsigned long)(res->start + IT87_EC_EXTENT - 1)); 1751 err = -EBUSY; 1752 goto ERROR0; 1753 } 1754 1755 data = kzalloc(sizeof(struct it87_data), GFP_KERNEL); 1756 if (!data) { 1757 err = -ENOMEM; 1758 goto ERROR1; 1759 } 1760 1761 data->addr = res->start; 1762 data->type = sio_data->type; 1763 data->revision = sio_data->revision; 1764 data->name = names[sio_data->type]; 1765 1766 /* Now, we do the remaining detection. */ 1767 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80) 1768 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) { 1769 err = -ENODEV; 1770 goto ERROR2; 1771 } 1772 1773 platform_set_drvdata(pdev, data); 1774 1775 mutex_init(&data->update_lock); 1776 1777 /* Check PWM configuration */ 1778 enable_pwm_interface = it87_check_pwm(dev); 1779 1780 /* Starting with IT8721F, we handle scaling of internal voltages */ 1781 if (data->type == it8721) { 1782 if (sio_data->internal & (1 << 0)) 1783 data->in_scaled |= (1 << 3); /* in3 is AVCC */ 1784 if (sio_data->internal & (1 << 1)) 1785 data->in_scaled |= (1 << 7); /* in7 is VSB */ 1786 if (sio_data->internal & (1 << 2)) 1787 data->in_scaled |= (1 << 8); /* in8 is Vbat */ 1788 } 1789 1790 /* Initialize the IT87 chip */ 1791 it87_init_device(pdev); 1792 1793 /* Register sysfs hooks */ 1794 err = sysfs_create_group(&dev->kobj, &it87_group); 1795 if (err) 1796 goto ERROR2; 1797 1798 if (sio_data->beep_pin) { 1799 err = sysfs_create_group(&dev->kobj, &it87_group_beep); 1800 if (err) 1801 goto ERROR4; 1802 } 1803 1804 /* Do not create fan files for disabled fans */ 1805 fan_group = it87_get_fan_group(data); 1806 fan_beep_need_rw = 1; 1807 for (i = 0; i < 5; i++) { 1808 if (!(data->has_fan & (1 << i))) 1809 continue; 1810 err = sysfs_create_group(&dev->kobj, &fan_group[i]); 1811 if (err) 1812 goto ERROR4; 1813 1814 if (sio_data->beep_pin) { 1815 err = sysfs_create_file(&dev->kobj, 1816 it87_attributes_fan_beep[i]); 1817 if (err) 1818 goto ERROR4; 1819 if (!fan_beep_need_rw) 1820 continue; 1821 1822 /* As we have a single beep enable bit for all fans, 1823 * only the first enabled fan has a writable attribute 1824 * for it. */ 1825 if (sysfs_chmod_file(&dev->kobj, 1826 it87_attributes_fan_beep[i], 1827 S_IRUGO | S_IWUSR)) 1828 dev_dbg(dev, "chmod +w fan%d_beep failed\n", 1829 i + 1); 1830 fan_beep_need_rw = 0; 1831 } 1832 } 1833 1834 if (enable_pwm_interface) { 1835 for (i = 0; i < 3; i++) { 1836 if (sio_data->skip_pwm & (1 << i)) 1837 continue; 1838 err = sysfs_create_group(&dev->kobj, 1839 &it87_group_pwm[i]); 1840 if (err) 1841 goto ERROR4; 1842 1843 if (!has_old_autopwm(data)) 1844 continue; 1845 err = sysfs_create_group(&dev->kobj, 1846 &it87_group_autopwm[i]); 1847 if (err) 1848 goto ERROR4; 1849 } 1850 } 1851 1852 if (!sio_data->skip_vid) { 1853 data->vrm = vid_which_vrm(); 1854 /* VID reading from Super-I/O config space if available */ 1855 data->vid = sio_data->vid_value; 1856 err = sysfs_create_group(&dev->kobj, &it87_group_vid); 1857 if (err) 1858 goto ERROR4; 1859 } 1860 1861 /* Export labels for internal sensors */ 1862 for (i = 0; i < 3; i++) { 1863 if (!(sio_data->internal & (1 << i))) 1864 continue; 1865 err = sysfs_create_file(&dev->kobj, 1866 it87_attributes_label[i]); 1867 if (err) 1868 goto ERROR4; 1869 } 1870 1871 data->hwmon_dev = hwmon_device_register(dev); 1872 if (IS_ERR(data->hwmon_dev)) { 1873 err = PTR_ERR(data->hwmon_dev); 1874 goto ERROR4; 1875 } 1876 1877 return 0; 1878 1879 ERROR4: 1880 it87_remove_files(dev); 1881 ERROR2: 1882 platform_set_drvdata(pdev, NULL); 1883 kfree(data); 1884 ERROR1: 1885 release_region(res->start, IT87_EC_EXTENT); 1886 ERROR0: 1887 return err; 1888 } 1889 1890 static int __devexit it87_remove(struct platform_device *pdev) 1891 { 1892 struct it87_data *data = platform_get_drvdata(pdev); 1893 1894 hwmon_device_unregister(data->hwmon_dev); 1895 it87_remove_files(&pdev->dev); 1896 1897 release_region(data->addr, IT87_EC_EXTENT); 1898 platform_set_drvdata(pdev, NULL); 1899 kfree(data); 1900 1901 return 0; 1902 } 1903 1904 /* Must be called with data->update_lock held, except during initialization. 1905 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1906 would slow down the IT87 access and should not be necessary. */ 1907 static int it87_read_value(struct it87_data *data, u8 reg) 1908 { 1909 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1910 return inb_p(data->addr + IT87_DATA_REG_OFFSET); 1911 } 1912 1913 /* Must be called with data->update_lock held, except during initialization. 1914 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1915 would slow down the IT87 access and should not be necessary. */ 1916 static void it87_write_value(struct it87_data *data, u8 reg, u8 value) 1917 { 1918 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1919 outb_p(value, data->addr + IT87_DATA_REG_OFFSET); 1920 } 1921 1922 /* Return 1 if and only if the PWM interface is safe to use */ 1923 static int __devinit it87_check_pwm(struct device *dev) 1924 { 1925 struct it87_data *data = dev_get_drvdata(dev); 1926 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off 1927 * and polarity set to active low is sign that this is the case so we 1928 * disable pwm control to protect the user. */ 1929 int tmp = it87_read_value(data, IT87_REG_FAN_CTL); 1930 if ((tmp & 0x87) == 0) { 1931 if (fix_pwm_polarity) { 1932 /* The user asks us to attempt a chip reconfiguration. 1933 * This means switching to active high polarity and 1934 * inverting all fan speed values. */ 1935 int i; 1936 u8 pwm[3]; 1937 1938 for (i = 0; i < 3; i++) 1939 pwm[i] = it87_read_value(data, 1940 IT87_REG_PWM(i)); 1941 1942 /* If any fan is in automatic pwm mode, the polarity 1943 * might be correct, as suspicious as it seems, so we 1944 * better don't change anything (but still disable the 1945 * PWM interface). */ 1946 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) { 1947 dev_info(dev, "Reconfiguring PWM to " 1948 "active high polarity\n"); 1949 it87_write_value(data, IT87_REG_FAN_CTL, 1950 tmp | 0x87); 1951 for (i = 0; i < 3; i++) 1952 it87_write_value(data, 1953 IT87_REG_PWM(i), 1954 0x7f & ~pwm[i]); 1955 return 1; 1956 } 1957 1958 dev_info(dev, "PWM configuration is " 1959 "too broken to be fixed\n"); 1960 } 1961 1962 dev_info(dev, "Detected broken BIOS " 1963 "defaults, disabling PWM interface\n"); 1964 return 0; 1965 } else if (fix_pwm_polarity) { 1966 dev_info(dev, "PWM configuration looks " 1967 "sane, won't touch\n"); 1968 } 1969 1970 return 1; 1971 } 1972 1973 /* Called when we have found a new IT87. */ 1974 static void __devinit it87_init_device(struct platform_device *pdev) 1975 { 1976 struct it87_sio_data *sio_data = pdev->dev.platform_data; 1977 struct it87_data *data = platform_get_drvdata(pdev); 1978 int tmp, i; 1979 u8 mask; 1980 1981 /* For each PWM channel: 1982 * - If it is in automatic mode, setting to manual mode should set 1983 * the fan to full speed by default. 1984 * - If it is in manual mode, we need a mapping to temperature 1985 * channels to use when later setting to automatic mode later. 1986 * Use a 1:1 mapping by default (we are clueless.) 1987 * In both cases, the value can (and should) be changed by the user 1988 * prior to switching to a different mode. 1989 * Note that this is no longer needed for the IT8721F and later, as 1990 * these have separate registers for the temperature mapping and the 1991 * manual duty cycle. */ 1992 for (i = 0; i < 3; i++) { 1993 data->pwm_temp_map[i] = i; 1994 data->pwm_duty[i] = 0x7f; /* Full speed */ 1995 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */ 1996 } 1997 1998 /* Some chips seem to have default value 0xff for all limit 1999 * registers. For low voltage limits it makes no sense and triggers 2000 * alarms, so change to 0 instead. For high temperature limits, it 2001 * means -1 degree C, which surprisingly doesn't trigger an alarm, 2002 * but is still confusing, so change to 127 degrees C. */ 2003 for (i = 0; i < 8; i++) { 2004 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i)); 2005 if (tmp == 0xff) 2006 it87_write_value(data, IT87_REG_VIN_MIN(i), 0); 2007 } 2008 for (i = 0; i < 3; i++) { 2009 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 2010 if (tmp == 0xff) 2011 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127); 2012 } 2013 2014 /* Temperature channels are not forcibly enabled, as they can be 2015 * set to two different sensor types and we can't guess which one 2016 * is correct for a given system. These channels can be enabled at 2017 * run-time through the temp{1-3}_type sysfs accessors if needed. */ 2018 2019 /* Check if voltage monitors are reset manually or by some reason */ 2020 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE); 2021 if ((tmp & 0xff) == 0) { 2022 /* Enable all voltage monitors */ 2023 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff); 2024 } 2025 2026 /* Check if tachometers are reset manually or by some reason */ 2027 mask = 0x70 & ~(sio_data->skip_fan << 4); 2028 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL); 2029 if ((data->fan_main_ctrl & mask) == 0) { 2030 /* Enable all fan tachometers */ 2031 data->fan_main_ctrl |= mask; 2032 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 2033 data->fan_main_ctrl); 2034 } 2035 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07; 2036 2037 /* Set tachometers to 16-bit mode if needed */ 2038 if (has_16bit_fans(data)) { 2039 tmp = it87_read_value(data, IT87_REG_FAN_16BIT); 2040 if (~tmp & 0x07 & data->has_fan) { 2041 dev_dbg(&pdev->dev, 2042 "Setting fan1-3 to 16-bit mode\n"); 2043 it87_write_value(data, IT87_REG_FAN_16BIT, 2044 tmp | 0x07); 2045 } 2046 /* IT8705F only supports three fans. */ 2047 if (data->type != it87) { 2048 if (tmp & (1 << 4)) 2049 data->has_fan |= (1 << 3); /* fan4 enabled */ 2050 if (tmp & (1 << 5)) 2051 data->has_fan |= (1 << 4); /* fan5 enabled */ 2052 } 2053 } 2054 2055 /* Fan input pins may be used for alternative functions */ 2056 data->has_fan &= ~sio_data->skip_fan; 2057 2058 /* Start monitoring */ 2059 it87_write_value(data, IT87_REG_CONFIG, 2060 (it87_read_value(data, IT87_REG_CONFIG) & 0x36) 2061 | (update_vbat ? 0x41 : 0x01)); 2062 } 2063 2064 static void it87_update_pwm_ctrl(struct it87_data *data, int nr) 2065 { 2066 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr)); 2067 if (data->type == it8721) { 2068 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03; 2069 data->pwm_duty[nr] = it87_read_value(data, 2070 IT87_REG_PWM_DUTY(nr)); 2071 } else { 2072 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */ 2073 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03; 2074 else /* Manual mode */ 2075 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f; 2076 } 2077 2078 if (has_old_autopwm(data)) { 2079 int i; 2080 2081 for (i = 0; i < 5 ; i++) 2082 data->auto_temp[nr][i] = it87_read_value(data, 2083 IT87_REG_AUTO_TEMP(nr, i)); 2084 for (i = 0; i < 3 ; i++) 2085 data->auto_pwm[nr][i] = it87_read_value(data, 2086 IT87_REG_AUTO_PWM(nr, i)); 2087 } 2088 } 2089 2090 static struct it87_data *it87_update_device(struct device *dev) 2091 { 2092 struct it87_data *data = dev_get_drvdata(dev); 2093 int i; 2094 2095 mutex_lock(&data->update_lock); 2096 2097 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 2098 || !data->valid) { 2099 if (update_vbat) { 2100 /* Cleared after each update, so reenable. Value 2101 returned by this read will be previous value */ 2102 it87_write_value(data, IT87_REG_CONFIG, 2103 it87_read_value(data, IT87_REG_CONFIG) | 0x40); 2104 } 2105 for (i = 0; i <= 7; i++) { 2106 data->in[i] = 2107 it87_read_value(data, IT87_REG_VIN(i)); 2108 data->in_min[i] = 2109 it87_read_value(data, IT87_REG_VIN_MIN(i)); 2110 data->in_max[i] = 2111 it87_read_value(data, IT87_REG_VIN_MAX(i)); 2112 } 2113 /* in8 (battery) has no limit registers */ 2114 data->in[8] = it87_read_value(data, IT87_REG_VIN(8)); 2115 2116 for (i = 0; i < 5; i++) { 2117 /* Skip disabled fans */ 2118 if (!(data->has_fan & (1 << i))) 2119 continue; 2120 2121 data->fan_min[i] = 2122 it87_read_value(data, IT87_REG_FAN_MIN[i]); 2123 data->fan[i] = it87_read_value(data, 2124 IT87_REG_FAN[i]); 2125 /* Add high byte if in 16-bit mode */ 2126 if (has_16bit_fans(data)) { 2127 data->fan[i] |= it87_read_value(data, 2128 IT87_REG_FANX[i]) << 8; 2129 data->fan_min[i] |= it87_read_value(data, 2130 IT87_REG_FANX_MIN[i]) << 8; 2131 } 2132 } 2133 for (i = 0; i < 3; i++) { 2134 data->temp[i] = 2135 it87_read_value(data, IT87_REG_TEMP(i)); 2136 data->temp_high[i] = 2137 it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 2138 data->temp_low[i] = 2139 it87_read_value(data, IT87_REG_TEMP_LOW(i)); 2140 } 2141 2142 /* Newer chips don't have clock dividers */ 2143 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) { 2144 i = it87_read_value(data, IT87_REG_FAN_DIV); 2145 data->fan_div[0] = i & 0x07; 2146 data->fan_div[1] = (i >> 3) & 0x07; 2147 data->fan_div[2] = (i & 0x40) ? 3 : 1; 2148 } 2149 2150 data->alarms = 2151 it87_read_value(data, IT87_REG_ALARM1) | 2152 (it87_read_value(data, IT87_REG_ALARM2) << 8) | 2153 (it87_read_value(data, IT87_REG_ALARM3) << 16); 2154 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE); 2155 2156 data->fan_main_ctrl = it87_read_value(data, 2157 IT87_REG_FAN_MAIN_CTRL); 2158 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL); 2159 for (i = 0; i < 3; i++) 2160 it87_update_pwm_ctrl(data, i); 2161 2162 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE); 2163 /* The 8705 does not have VID capability. 2164 The 8718 and later don't use IT87_REG_VID for the 2165 same purpose. */ 2166 if (data->type == it8712 || data->type == it8716) { 2167 data->vid = it87_read_value(data, IT87_REG_VID); 2168 /* The older IT8712F revisions had only 5 VID pins, 2169 but we assume it is always safe to read 6 bits. */ 2170 data->vid &= 0x3f; 2171 } 2172 data->last_updated = jiffies; 2173 data->valid = 1; 2174 } 2175 2176 mutex_unlock(&data->update_lock); 2177 2178 return data; 2179 } 2180 2181 static int __init it87_device_add(unsigned short address, 2182 const struct it87_sio_data *sio_data) 2183 { 2184 struct resource res = { 2185 .start = address + IT87_EC_OFFSET, 2186 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1, 2187 .name = DRVNAME, 2188 .flags = IORESOURCE_IO, 2189 }; 2190 int err; 2191 2192 err = acpi_check_resource_conflict(&res); 2193 if (err) 2194 goto exit; 2195 2196 pdev = platform_device_alloc(DRVNAME, address); 2197 if (!pdev) { 2198 err = -ENOMEM; 2199 pr_err("Device allocation failed\n"); 2200 goto exit; 2201 } 2202 2203 err = platform_device_add_resources(pdev, &res, 1); 2204 if (err) { 2205 pr_err("Device resource addition failed (%d)\n", err); 2206 goto exit_device_put; 2207 } 2208 2209 err = platform_device_add_data(pdev, sio_data, 2210 sizeof(struct it87_sio_data)); 2211 if (err) { 2212 pr_err("Platform data allocation failed\n"); 2213 goto exit_device_put; 2214 } 2215 2216 err = platform_device_add(pdev); 2217 if (err) { 2218 pr_err("Device addition failed (%d)\n", err); 2219 goto exit_device_put; 2220 } 2221 2222 return 0; 2223 2224 exit_device_put: 2225 platform_device_put(pdev); 2226 exit: 2227 return err; 2228 } 2229 2230 static int __init sm_it87_init(void) 2231 { 2232 int err; 2233 unsigned short isa_address = 0; 2234 struct it87_sio_data sio_data; 2235 2236 memset(&sio_data, 0, sizeof(struct it87_sio_data)); 2237 err = it87_find(&isa_address, &sio_data); 2238 if (err) 2239 return err; 2240 err = platform_driver_register(&it87_driver); 2241 if (err) 2242 return err; 2243 2244 err = it87_device_add(isa_address, &sio_data); 2245 if (err) { 2246 platform_driver_unregister(&it87_driver); 2247 return err; 2248 } 2249 2250 return 0; 2251 } 2252 2253 static void __exit sm_it87_exit(void) 2254 { 2255 platform_device_unregister(pdev); 2256 platform_driver_unregister(&it87_driver); 2257 } 2258 2259 2260 MODULE_AUTHOR("Chris Gauthron, " 2261 "Jean Delvare <khali@linux-fr.org>"); 2262 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver"); 2263 module_param(update_vbat, bool, 0); 2264 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); 2265 module_param(fix_pwm_polarity, bool, 0); 2266 MODULE_PARM_DESC(fix_pwm_polarity, 2267 "Force PWM polarity to active high (DANGEROUS)"); 2268 MODULE_LICENSE("GPL"); 2269 2270 module_init(sm_it87_init); 2271 module_exit(sm_it87_exit); 2272