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