1 /* 2 * it87.c - Part of lm_sensors, Linux kernel modules for hardware 3 * monitoring. 4 * 5 * The IT8705F is an LPC-based Super I/O part that contains UARTs, a 6 * parallel port, an IR port, a MIDI port, a floppy controller, etc., in 7 * addition to an Environment Controller (Enhanced Hardware Monitor and 8 * Fan Controller) 9 * 10 * This driver supports only the Environment Controller in the IT8705F and 11 * similar parts. The other devices are supported by different drivers. 12 * 13 * Supports: IT8705F Super I/O chip w/LPC interface 14 * IT8712F Super I/O chip w/LPC interface 15 * IT8716F Super I/O chip w/LPC interface 16 * IT8718F Super I/O chip w/LPC interface 17 * IT8720F Super I/O chip w/LPC interface 18 * IT8721F Super I/O chip w/LPC interface 19 * IT8726F Super I/O chip w/LPC interface 20 * IT8758E Super I/O chip w/LPC interface 21 * Sis950 A clone of the IT8705F 22 * 23 * Copyright (C) 2001 Chris Gauthron 24 * Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org> 25 * 26 * This program is free software; you can redistribute it and/or modify 27 * it under the terms of the GNU General Public License as published by 28 * the Free Software Foundation; either version 2 of the License, or 29 * (at your option) any later version. 30 * 31 * This program is distributed in the hope that it will be useful, 32 * but WITHOUT ANY WARRANTY; without even the implied warranty of 33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 34 * GNU General Public License for more details. 35 * 36 * You should have received a copy of the GNU General Public License 37 * along with this program; if not, write to the Free Software 38 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 39 */ 40 41 #include <linux/module.h> 42 #include <linux/init.h> 43 #include <linux/slab.h> 44 #include <linux/jiffies.h> 45 #include <linux/platform_device.h> 46 #include <linux/hwmon.h> 47 #include <linux/hwmon-sysfs.h> 48 #include <linux/hwmon-vid.h> 49 #include <linux/err.h> 50 #include <linux/mutex.h> 51 #include <linux/sysfs.h> 52 #include <linux/string.h> 53 #include <linux/dmi.h> 54 #include <linux/acpi.h> 55 #include <linux/io.h> 56 57 #define DRVNAME "it87" 58 59 enum chips { it87, it8712, it8716, it8718, it8720, it8721 }; 60 61 static unsigned short force_id; 62 module_param(force_id, ushort, 0); 63 MODULE_PARM_DESC(force_id, "Override the detected device ID"); 64 65 static struct platform_device *pdev; 66 67 #define REG 0x2e /* The register to read/write */ 68 #define DEV 0x07 /* Register: Logical device select */ 69 #define VAL 0x2f /* The value to read/write */ 70 #define PME 0x04 /* The device with the fan registers in it */ 71 72 /* The device with the IT8718F/IT8720F VID value in it */ 73 #define GPIO 0x07 74 75 #define DEVID 0x20 /* Register: Device ID */ 76 #define DEVREV 0x22 /* Register: Device Revision */ 77 78 static inline int 79 superio_inb(int reg) 80 { 81 outb(reg, REG); 82 return inb(VAL); 83 } 84 85 static inline void 86 superio_outb(int reg, int val) 87 { 88 outb(reg, REG); 89 outb(val, VAL); 90 } 91 92 static int superio_inw(int reg) 93 { 94 int val; 95 outb(reg++, REG); 96 val = inb(VAL) << 8; 97 outb(reg, REG); 98 val |= inb(VAL); 99 return val; 100 } 101 102 static inline void 103 superio_select(int ldn) 104 { 105 outb(DEV, REG); 106 outb(ldn, VAL); 107 } 108 109 static inline void 110 superio_enter(void) 111 { 112 outb(0x87, REG); 113 outb(0x01, REG); 114 outb(0x55, REG); 115 outb(0x55, REG); 116 } 117 118 static inline void 119 superio_exit(void) 120 { 121 outb(0x02, REG); 122 outb(0x02, VAL); 123 } 124 125 /* Logical device 4 registers */ 126 #define IT8712F_DEVID 0x8712 127 #define IT8705F_DEVID 0x8705 128 #define IT8716F_DEVID 0x8716 129 #define IT8718F_DEVID 0x8718 130 #define IT8720F_DEVID 0x8720 131 #define IT8721F_DEVID 0x8721 132 #define IT8726F_DEVID 0x8726 133 #define IT87_ACT_REG 0x30 134 #define IT87_BASE_REG 0x60 135 136 /* Logical device 7 registers (IT8712F and later) */ 137 #define IT87_SIO_GPIO3_REG 0x27 138 #define IT87_SIO_GPIO5_REG 0x29 139 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */ 140 #define IT87_SIO_VID_REG 0xfc /* VID value */ 141 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */ 142 143 /* Update battery voltage after every reading if true */ 144 static int update_vbat; 145 146 /* Not all BIOSes properly configure the PWM registers */ 147 static int fix_pwm_polarity; 148 149 /* Many IT87 constants specified below */ 150 151 /* Length of ISA address segment */ 152 #define IT87_EXTENT 8 153 154 /* Length of ISA address segment for Environmental Controller */ 155 #define IT87_EC_EXTENT 2 156 157 /* Offset of EC registers from ISA base address */ 158 #define IT87_EC_OFFSET 5 159 160 /* Where are the ISA address/data registers relative to the EC base address */ 161 #define IT87_ADDR_REG_OFFSET 0 162 #define IT87_DATA_REG_OFFSET 1 163 164 /*----- The IT87 registers -----*/ 165 166 #define IT87_REG_CONFIG 0x00 167 168 #define IT87_REG_ALARM1 0x01 169 #define IT87_REG_ALARM2 0x02 170 #define IT87_REG_ALARM3 0x03 171 172 /* The IT8718F and IT8720F have the VID value in a different register, in 173 Super-I/O configuration space. */ 174 #define IT87_REG_VID 0x0a 175 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b 176 for fan divisors. Later IT8712F revisions must use 16-bit tachometer 177 mode. */ 178 #define IT87_REG_FAN_DIV 0x0b 179 #define IT87_REG_FAN_16BIT 0x0c 180 181 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */ 182 183 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 }; 184 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 }; 185 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 }; 186 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 }; 187 #define IT87_REG_FAN_MAIN_CTRL 0x13 188 #define IT87_REG_FAN_CTL 0x14 189 #define IT87_REG_PWM(nr) (0x15 + (nr)) 190 #define IT87_REG_PWM_DUTY(nr) (0x63 + (nr) * 8) 191 192 #define IT87_REG_VIN(nr) (0x20 + (nr)) 193 #define IT87_REG_TEMP(nr) (0x29 + (nr)) 194 195 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2) 196 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2) 197 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2) 198 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2) 199 200 #define IT87_REG_VIN_ENABLE 0x50 201 #define IT87_REG_TEMP_ENABLE 0x51 202 #define IT87_REG_BEEP_ENABLE 0x5c 203 204 #define IT87_REG_CHIPID 0x58 205 206 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i)) 207 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i)) 208 209 210 struct it87_sio_data { 211 enum chips type; 212 /* Values read from Super-I/O config space */ 213 u8 revision; 214 u8 vid_value; 215 u8 beep_pin; 216 u8 internal; /* Internal sensors can be labeled */ 217 /* Features skipped based on config or DMI */ 218 u8 skip_vid; 219 u8 skip_fan; 220 u8 skip_pwm; 221 }; 222 223 /* For each registered chip, we need to keep some data in memory. 224 The structure is dynamically allocated. */ 225 struct it87_data { 226 struct device *hwmon_dev; 227 enum chips type; 228 u8 revision; 229 230 unsigned short addr; 231 const char *name; 232 struct mutex update_lock; 233 char valid; /* !=0 if following fields are valid */ 234 unsigned long last_updated; /* In jiffies */ 235 236 u16 in_scaled; /* Internal voltage sensors are scaled */ 237 u8 in[9]; /* Register value */ 238 u8 in_max[8]; /* Register value */ 239 u8 in_min[8]; /* Register value */ 240 u8 has_fan; /* Bitfield, fans enabled */ 241 u16 fan[5]; /* Register values, possibly combined */ 242 u16 fan_min[5]; /* Register values, possibly combined */ 243 s8 temp[3]; /* Register value */ 244 s8 temp_high[3]; /* Register value */ 245 s8 temp_low[3]; /* Register value */ 246 u8 sensor; /* Register value */ 247 u8 fan_div[3]; /* Register encoding, shifted right */ 248 u8 vid; /* Register encoding, combined */ 249 u8 vrm; 250 u32 alarms; /* Register encoding, combined */ 251 u8 beeps; /* Register encoding */ 252 u8 fan_main_ctrl; /* Register value */ 253 u8 fan_ctl; /* Register value */ 254 255 /* The following 3 arrays correspond to the same registers up to 256 * the IT8720F. The meaning of bits 6-0 depends on the value of bit 257 * 7, and we want to preserve settings on mode changes, so we have 258 * to track all values separately. 259 * Starting with the IT8721F, the manual PWM duty cycles are stored 260 * in separate registers (8-bit values), so the separate tracking 261 * is no longer needed, but it is still done to keep the driver 262 * simple. */ 263 u8 pwm_ctrl[3]; /* Register value */ 264 u8 pwm_duty[3]; /* Manual PWM value set by user */ 265 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */ 266 267 /* Automatic fan speed control registers */ 268 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */ 269 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */ 270 }; 271 272 static u8 in_to_reg(const struct it87_data *data, int nr, long val) 273 { 274 long lsb; 275 276 if (data->type == it8721) { 277 if (data->in_scaled & (1 << nr)) 278 lsb = 24; 279 else 280 lsb = 12; 281 } else 282 lsb = 16; 283 284 val = DIV_ROUND_CLOSEST(val, lsb); 285 return SENSORS_LIMIT(val, 0, 255); 286 } 287 288 static int in_from_reg(const struct it87_data *data, int nr, int val) 289 { 290 if (data->type == it8721) { 291 if (data->in_scaled & (1 << nr)) 292 return val * 24; 293 else 294 return val * 12; 295 } else 296 return val * 16; 297 } 298 299 static inline u8 FAN_TO_REG(long rpm, int div) 300 { 301 if (rpm == 0) 302 return 255; 303 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 304 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 305 254); 306 } 307 308 static inline u16 FAN16_TO_REG(long rpm) 309 { 310 if (rpm == 0) 311 return 0xffff; 312 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe); 313 } 314 315 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \ 316 1350000 / ((val) * (div))) 317 /* The divider is fixed to 2 in 16-bit mode */ 318 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \ 319 1350000 / ((val) * 2)) 320 321 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \ 322 ((val) + 500) / 1000), -128, 127)) 323 #define TEMP_FROM_REG(val) ((val) * 1000) 324 325 static u8 pwm_to_reg(const struct it87_data *data, long val) 326 { 327 if (data->type == it8721) 328 return val; 329 else 330 return val >> 1; 331 } 332 333 static int pwm_from_reg(const struct it87_data *data, u8 reg) 334 { 335 if (data->type == it8721) 336 return reg; 337 else 338 return (reg & 0x7f) << 1; 339 } 340 341 342 static int DIV_TO_REG(int val) 343 { 344 int answer = 0; 345 while (answer < 7 && (val >>= 1)) 346 answer++; 347 return answer; 348 } 349 #define DIV_FROM_REG(val) (1 << (val)) 350 351 static const unsigned int pwm_freq[8] = { 352 48000000 / 128, 353 24000000 / 128, 354 12000000 / 128, 355 8000000 / 128, 356 6000000 / 128, 357 3000000 / 128, 358 1500000 / 128, 359 750000 / 128, 360 }; 361 362 static inline int has_16bit_fans(const struct it87_data *data) 363 { 364 /* IT8705F Datasheet 0.4.1, 3h == Version G. 365 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J. 366 These are the first revisions with 16bit tachometer support. */ 367 return (data->type == it87 && data->revision >= 0x03) 368 || (data->type == it8712 && data->revision >= 0x08) 369 || data->type == it8716 370 || data->type == it8718 371 || data->type == it8720 372 || data->type == it8721; 373 } 374 375 static inline int has_old_autopwm(const struct it87_data *data) 376 { 377 /* The old automatic fan speed control interface is implemented 378 by IT8705F chips up to revision F and IT8712F chips up to 379 revision G. */ 380 return (data->type == it87 && data->revision < 0x03) 381 || (data->type == it8712 && data->revision < 0x08); 382 } 383 384 static int it87_probe(struct platform_device *pdev); 385 static int __devexit it87_remove(struct platform_device *pdev); 386 387 static int it87_read_value(struct it87_data *data, u8 reg); 388 static void it87_write_value(struct it87_data *data, u8 reg, u8 value); 389 static struct it87_data *it87_update_device(struct device *dev); 390 static int it87_check_pwm(struct device *dev); 391 static void it87_init_device(struct platform_device *pdev); 392 393 394 static struct platform_driver it87_driver = { 395 .driver = { 396 .owner = THIS_MODULE, 397 .name = DRVNAME, 398 }, 399 .probe = it87_probe, 400 .remove = __devexit_p(it87_remove), 401 }; 402 403 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 404 char *buf) 405 { 406 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 407 int nr = sensor_attr->index; 408 409 struct it87_data *data = it87_update_device(dev); 410 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr])); 411 } 412 413 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 414 char *buf) 415 { 416 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 417 int nr = sensor_attr->index; 418 419 struct it87_data *data = it87_update_device(dev); 420 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_min[nr])); 421 } 422 423 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 424 char *buf) 425 { 426 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 427 int nr = sensor_attr->index; 428 429 struct it87_data *data = it87_update_device(dev); 430 return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in_max[nr])); 431 } 432 433 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 434 const char *buf, size_t count) 435 { 436 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 437 int nr = sensor_attr->index; 438 439 struct it87_data *data = dev_get_drvdata(dev); 440 unsigned long val; 441 442 if (strict_strtoul(buf, 10, &val) < 0) 443 return -EINVAL; 444 445 mutex_lock(&data->update_lock); 446 data->in_min[nr] = in_to_reg(data, nr, val); 447 it87_write_value(data, IT87_REG_VIN_MIN(nr), 448 data->in_min[nr]); 449 mutex_unlock(&data->update_lock); 450 return count; 451 } 452 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 453 const char *buf, size_t count) 454 { 455 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 456 int nr = sensor_attr->index; 457 458 struct it87_data *data = dev_get_drvdata(dev); 459 unsigned long val; 460 461 if (strict_strtoul(buf, 10, &val) < 0) 462 return -EINVAL; 463 464 mutex_lock(&data->update_lock); 465 data->in_max[nr] = in_to_reg(data, nr, val); 466 it87_write_value(data, IT87_REG_VIN_MAX(nr), 467 data->in_max[nr]); 468 mutex_unlock(&data->update_lock); 469 return count; 470 } 471 472 #define show_in_offset(offset) \ 473 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 474 show_in, NULL, offset); 475 476 #define limit_in_offset(offset) \ 477 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 478 show_in_min, set_in_min, offset); \ 479 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 480 show_in_max, set_in_max, offset); 481 482 show_in_offset(0); 483 limit_in_offset(0); 484 show_in_offset(1); 485 limit_in_offset(1); 486 show_in_offset(2); 487 limit_in_offset(2); 488 show_in_offset(3); 489 limit_in_offset(3); 490 show_in_offset(4); 491 limit_in_offset(4); 492 show_in_offset(5); 493 limit_in_offset(5); 494 show_in_offset(6); 495 limit_in_offset(6); 496 show_in_offset(7); 497 limit_in_offset(7); 498 show_in_offset(8); 499 500 /* 3 temperatures */ 501 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 502 char *buf) 503 { 504 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 505 int nr = sensor_attr->index; 506 507 struct it87_data *data = it87_update_device(dev); 508 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 509 } 510 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 511 char *buf) 512 { 513 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 514 int nr = sensor_attr->index; 515 516 struct it87_data *data = it87_update_device(dev); 517 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); 518 } 519 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 520 char *buf) 521 { 522 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 523 int nr = sensor_attr->index; 524 525 struct it87_data *data = it87_update_device(dev); 526 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); 527 } 528 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 529 const char *buf, size_t count) 530 { 531 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 532 int nr = sensor_attr->index; 533 534 struct it87_data *data = dev_get_drvdata(dev); 535 long val; 536 537 if (strict_strtol(buf, 10, &val) < 0) 538 return -EINVAL; 539 540 mutex_lock(&data->update_lock); 541 data->temp_high[nr] = TEMP_TO_REG(val); 542 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); 543 mutex_unlock(&data->update_lock); 544 return count; 545 } 546 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 547 const char *buf, size_t count) 548 { 549 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 550 int nr = sensor_attr->index; 551 552 struct it87_data *data = dev_get_drvdata(dev); 553 long val; 554 555 if (strict_strtol(buf, 10, &val) < 0) 556 return -EINVAL; 557 558 mutex_lock(&data->update_lock); 559 data->temp_low[nr] = TEMP_TO_REG(val); 560 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); 561 mutex_unlock(&data->update_lock); 562 return count; 563 } 564 #define show_temp_offset(offset) \ 565 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 566 show_temp, NULL, offset - 1); \ 567 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 568 show_temp_max, set_temp_max, offset - 1); \ 569 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 570 show_temp_min, set_temp_min, offset - 1); 571 572 show_temp_offset(1); 573 show_temp_offset(2); 574 show_temp_offset(3); 575 576 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, 577 char *buf) 578 { 579 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 580 int nr = sensor_attr->index; 581 582 struct it87_data *data = it87_update_device(dev); 583 u8 reg = data->sensor; /* In case the value is updated while 584 we use it */ 585 586 if (reg & (1 << nr)) 587 return sprintf(buf, "3\n"); /* thermal diode */ 588 if (reg & (8 << nr)) 589 return sprintf(buf, "4\n"); /* thermistor */ 590 return sprintf(buf, "0\n"); /* disabled */ 591 } 592 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, 593 const char *buf, size_t count) 594 { 595 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 596 int nr = sensor_attr->index; 597 598 struct it87_data *data = dev_get_drvdata(dev); 599 long val; 600 u8 reg; 601 602 if (strict_strtol(buf, 10, &val) < 0) 603 return -EINVAL; 604 605 reg = it87_read_value(data, IT87_REG_TEMP_ENABLE); 606 reg &= ~(1 << nr); 607 reg &= ~(8 << nr); 608 if (val == 2) { /* backwards compatibility */ 609 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 " 610 "instead\n"); 611 val = 4; 612 } 613 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */ 614 if (val == 3) 615 reg |= 1 << nr; 616 else if (val == 4) 617 reg |= 8 << nr; 618 else if (val != 0) 619 return -EINVAL; 620 621 mutex_lock(&data->update_lock); 622 data->sensor = reg; 623 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor); 624 data->valid = 0; /* Force cache refresh */ 625 mutex_unlock(&data->update_lock); 626 return count; 627 } 628 #define show_sensor_offset(offset) \ 629 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ 630 show_sensor, set_sensor, offset - 1); 631 632 show_sensor_offset(1); 633 show_sensor_offset(2); 634 show_sensor_offset(3); 635 636 /* 3 Fans */ 637 638 static int pwm_mode(const struct it87_data *data, int nr) 639 { 640 int ctrl = data->fan_main_ctrl & (1 << nr); 641 642 if (ctrl == 0) /* Full speed */ 643 return 0; 644 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */ 645 return 2; 646 else /* Manual mode */ 647 return 1; 648 } 649 650 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 651 char *buf) 652 { 653 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 654 int nr = sensor_attr->index; 655 656 struct it87_data *data = it87_update_device(dev); 657 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 658 DIV_FROM_REG(data->fan_div[nr]))); 659 } 660 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 661 char *buf) 662 { 663 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 664 int nr = sensor_attr->index; 665 666 struct it87_data *data = it87_update_device(dev); 667 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 668 DIV_FROM_REG(data->fan_div[nr]))); 669 } 670 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 671 char *buf) 672 { 673 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 674 int nr = sensor_attr->index; 675 676 struct it87_data *data = it87_update_device(dev); 677 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 678 } 679 static ssize_t show_pwm_enable(struct device *dev, 680 struct device_attribute *attr, char *buf) 681 { 682 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 683 int nr = sensor_attr->index; 684 685 struct it87_data *data = it87_update_device(dev); 686 return sprintf(buf, "%d\n", pwm_mode(data, nr)); 687 } 688 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 689 char *buf) 690 { 691 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 692 int nr = sensor_attr->index; 693 694 struct it87_data *data = it87_update_device(dev); 695 return sprintf(buf, "%d\n", 696 pwm_from_reg(data, data->pwm_duty[nr])); 697 } 698 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr, 699 char *buf) 700 { 701 struct it87_data *data = it87_update_device(dev); 702 int index = (data->fan_ctl >> 4) & 0x07; 703 704 return sprintf(buf, "%u\n", pwm_freq[index]); 705 } 706 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 707 const char *buf, size_t count) 708 { 709 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 710 int nr = sensor_attr->index; 711 712 struct it87_data *data = dev_get_drvdata(dev); 713 long val; 714 u8 reg; 715 716 if (strict_strtol(buf, 10, &val) < 0) 717 return -EINVAL; 718 719 mutex_lock(&data->update_lock); 720 reg = it87_read_value(data, IT87_REG_FAN_DIV); 721 switch (nr) { 722 case 0: 723 data->fan_div[nr] = reg & 0x07; 724 break; 725 case 1: 726 data->fan_div[nr] = (reg >> 3) & 0x07; 727 break; 728 case 2: 729 data->fan_div[nr] = (reg & 0x40) ? 3 : 1; 730 break; 731 } 732 733 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 734 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 735 mutex_unlock(&data->update_lock); 736 return count; 737 } 738 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 739 const char *buf, size_t count) 740 { 741 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 742 int nr = sensor_attr->index; 743 744 struct it87_data *data = dev_get_drvdata(dev); 745 unsigned long val; 746 int min; 747 u8 old; 748 749 if (strict_strtoul(buf, 10, &val) < 0) 750 return -EINVAL; 751 752 mutex_lock(&data->update_lock); 753 old = it87_read_value(data, IT87_REG_FAN_DIV); 754 755 /* Save fan min limit */ 756 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 757 758 switch (nr) { 759 case 0: 760 case 1: 761 data->fan_div[nr] = DIV_TO_REG(val); 762 break; 763 case 2: 764 if (val < 8) 765 data->fan_div[nr] = 1; 766 else 767 data->fan_div[nr] = 3; 768 } 769 val = old & 0x80; 770 val |= (data->fan_div[0] & 0x07); 771 val |= (data->fan_div[1] & 0x07) << 3; 772 if (data->fan_div[2] == 3) 773 val |= 0x1 << 6; 774 it87_write_value(data, IT87_REG_FAN_DIV, val); 775 776 /* Restore fan min limit */ 777 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 778 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 779 780 mutex_unlock(&data->update_lock); 781 return count; 782 } 783 784 /* Returns 0 if OK, -EINVAL otherwise */ 785 static int check_trip_points(struct device *dev, int nr) 786 { 787 const struct it87_data *data = dev_get_drvdata(dev); 788 int i, err = 0; 789 790 if (has_old_autopwm(data)) { 791 for (i = 0; i < 3; i++) { 792 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1]) 793 err = -EINVAL; 794 } 795 for (i = 0; i < 2; i++) { 796 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1]) 797 err = -EINVAL; 798 } 799 } 800 801 if (err) { 802 dev_err(dev, "Inconsistent trip points, not switching to " 803 "automatic mode\n"); 804 dev_err(dev, "Adjust the trip points and try again\n"); 805 } 806 return err; 807 } 808 809 static ssize_t set_pwm_enable(struct device *dev, 810 struct device_attribute *attr, const char *buf, size_t count) 811 { 812 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 813 int nr = sensor_attr->index; 814 815 struct it87_data *data = dev_get_drvdata(dev); 816 long val; 817 818 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2) 819 return -EINVAL; 820 821 /* Check trip points before switching to automatic mode */ 822 if (val == 2) { 823 if (check_trip_points(dev, nr) < 0) 824 return -EINVAL; 825 } 826 827 mutex_lock(&data->update_lock); 828 829 if (val == 0) { 830 int tmp; 831 /* make sure the fan is on when in on/off mode */ 832 tmp = it87_read_value(data, IT87_REG_FAN_CTL); 833 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr)); 834 /* set on/off mode */ 835 data->fan_main_ctrl &= ~(1 << nr); 836 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 837 data->fan_main_ctrl); 838 } else { 839 if (val == 1) /* Manual mode */ 840 data->pwm_ctrl[nr] = data->type == it8721 ? 841 data->pwm_temp_map[nr] : 842 data->pwm_duty[nr]; 843 else /* Automatic mode */ 844 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 845 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 846 /* set SmartGuardian mode */ 847 data->fan_main_ctrl |= (1 << nr); 848 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 849 data->fan_main_ctrl); 850 } 851 852 mutex_unlock(&data->update_lock); 853 return count; 854 } 855 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 856 const char *buf, size_t count) 857 { 858 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 859 int nr = sensor_attr->index; 860 861 struct it87_data *data = dev_get_drvdata(dev); 862 long val; 863 864 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255) 865 return -EINVAL; 866 867 mutex_lock(&data->update_lock); 868 if (data->type == it8721) { 869 /* If we are in automatic mode, the PWM duty cycle register 870 * is read-only so we can't write the value */ 871 if (data->pwm_ctrl[nr] & 0x80) { 872 mutex_unlock(&data->update_lock); 873 return -EBUSY; 874 } 875 data->pwm_duty[nr] = pwm_to_reg(data, val); 876 it87_write_value(data, IT87_REG_PWM_DUTY(nr), 877 data->pwm_duty[nr]); 878 } else { 879 data->pwm_duty[nr] = pwm_to_reg(data, val); 880 /* If we are in manual mode, write the duty cycle immediately; 881 * otherwise, just store it for later use. */ 882 if (!(data->pwm_ctrl[nr] & 0x80)) { 883 data->pwm_ctrl[nr] = data->pwm_duty[nr]; 884 it87_write_value(data, IT87_REG_PWM(nr), 885 data->pwm_ctrl[nr]); 886 } 887 } 888 mutex_unlock(&data->update_lock); 889 return count; 890 } 891 static ssize_t set_pwm_freq(struct device *dev, 892 struct device_attribute *attr, const char *buf, size_t count) 893 { 894 struct it87_data *data = dev_get_drvdata(dev); 895 unsigned long val; 896 int i; 897 898 if (strict_strtoul(buf, 10, &val) < 0) 899 return -EINVAL; 900 901 /* Search for the nearest available frequency */ 902 for (i = 0; i < 7; i++) { 903 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2) 904 break; 905 } 906 907 mutex_lock(&data->update_lock); 908 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f; 909 data->fan_ctl |= i << 4; 910 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl); 911 mutex_unlock(&data->update_lock); 912 913 return count; 914 } 915 static ssize_t show_pwm_temp_map(struct device *dev, 916 struct device_attribute *attr, char *buf) 917 { 918 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 919 int nr = sensor_attr->index; 920 921 struct it87_data *data = it87_update_device(dev); 922 int map; 923 924 if (data->pwm_temp_map[nr] < 3) 925 map = 1 << data->pwm_temp_map[nr]; 926 else 927 map = 0; /* Should never happen */ 928 return sprintf(buf, "%d\n", map); 929 } 930 static ssize_t set_pwm_temp_map(struct device *dev, 931 struct device_attribute *attr, const char *buf, size_t count) 932 { 933 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 934 int nr = sensor_attr->index; 935 936 struct it87_data *data = dev_get_drvdata(dev); 937 long val; 938 u8 reg; 939 940 /* This check can go away if we ever support automatic fan speed 941 control on newer chips. */ 942 if (!has_old_autopwm(data)) { 943 dev_notice(dev, "Mapping change disabled for safety reasons\n"); 944 return -EINVAL; 945 } 946 947 if (strict_strtol(buf, 10, &val) < 0) 948 return -EINVAL; 949 950 switch (val) { 951 case (1 << 0): 952 reg = 0x00; 953 break; 954 case (1 << 1): 955 reg = 0x01; 956 break; 957 case (1 << 2): 958 reg = 0x02; 959 break; 960 default: 961 return -EINVAL; 962 } 963 964 mutex_lock(&data->update_lock); 965 data->pwm_temp_map[nr] = reg; 966 /* If we are in automatic mode, write the temp mapping immediately; 967 * otherwise, just store it for later use. */ 968 if (data->pwm_ctrl[nr] & 0x80) { 969 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 970 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 971 } 972 mutex_unlock(&data->update_lock); 973 return count; 974 } 975 976 static ssize_t show_auto_pwm(struct device *dev, 977 struct device_attribute *attr, char *buf) 978 { 979 struct it87_data *data = it87_update_device(dev); 980 struct sensor_device_attribute_2 *sensor_attr = 981 to_sensor_dev_attr_2(attr); 982 int nr = sensor_attr->nr; 983 int point = sensor_attr->index; 984 985 return sprintf(buf, "%d\n", 986 pwm_from_reg(data, data->auto_pwm[nr][point])); 987 } 988 989 static ssize_t set_auto_pwm(struct device *dev, 990 struct device_attribute *attr, const char *buf, size_t count) 991 { 992 struct it87_data *data = dev_get_drvdata(dev); 993 struct sensor_device_attribute_2 *sensor_attr = 994 to_sensor_dev_attr_2(attr); 995 int nr = sensor_attr->nr; 996 int point = sensor_attr->index; 997 long val; 998 999 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255) 1000 return -EINVAL; 1001 1002 mutex_lock(&data->update_lock); 1003 data->auto_pwm[nr][point] = pwm_to_reg(data, val); 1004 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point), 1005 data->auto_pwm[nr][point]); 1006 mutex_unlock(&data->update_lock); 1007 return count; 1008 } 1009 1010 static ssize_t show_auto_temp(struct device *dev, 1011 struct device_attribute *attr, char *buf) 1012 { 1013 struct it87_data *data = it87_update_device(dev); 1014 struct sensor_device_attribute_2 *sensor_attr = 1015 to_sensor_dev_attr_2(attr); 1016 int nr = sensor_attr->nr; 1017 int point = sensor_attr->index; 1018 1019 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point])); 1020 } 1021 1022 static ssize_t set_auto_temp(struct device *dev, 1023 struct device_attribute *attr, const char *buf, size_t count) 1024 { 1025 struct it87_data *data = dev_get_drvdata(dev); 1026 struct sensor_device_attribute_2 *sensor_attr = 1027 to_sensor_dev_attr_2(attr); 1028 int nr = sensor_attr->nr; 1029 int point = sensor_attr->index; 1030 long val; 1031 1032 if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000) 1033 return -EINVAL; 1034 1035 mutex_lock(&data->update_lock); 1036 data->auto_temp[nr][point] = TEMP_TO_REG(val); 1037 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point), 1038 data->auto_temp[nr][point]); 1039 mutex_unlock(&data->update_lock); 1040 return count; 1041 } 1042 1043 #define show_fan_offset(offset) \ 1044 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 1045 show_fan, NULL, offset - 1); \ 1046 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 1047 show_fan_min, set_fan_min, offset - 1); \ 1048 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 1049 show_fan_div, set_fan_div, offset - 1); 1050 1051 show_fan_offset(1); 1052 show_fan_offset(2); 1053 show_fan_offset(3); 1054 1055 #define show_pwm_offset(offset) \ 1056 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 1057 show_pwm_enable, set_pwm_enable, offset - 1); \ 1058 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 1059 show_pwm, set_pwm, offset - 1); \ 1060 static DEVICE_ATTR(pwm##offset##_freq, \ 1061 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \ 1062 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \ 1063 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \ 1064 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \ 1065 offset - 1); \ 1066 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \ 1067 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1068 offset - 1, 0); \ 1069 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \ 1070 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1071 offset - 1, 1); \ 1072 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \ 1073 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1074 offset - 1, 2); \ 1075 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \ 1076 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \ 1077 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \ 1078 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1079 offset - 1, 1); \ 1080 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \ 1081 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1082 offset - 1, 0); \ 1083 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \ 1084 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1085 offset - 1, 2); \ 1086 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \ 1087 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1088 offset - 1, 3); \ 1089 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \ 1090 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1091 offset - 1, 4); 1092 1093 show_pwm_offset(1); 1094 show_pwm_offset(2); 1095 show_pwm_offset(3); 1096 1097 /* A different set of callbacks for 16-bit fans */ 1098 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr, 1099 char *buf) 1100 { 1101 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1102 int nr = sensor_attr->index; 1103 struct it87_data *data = it87_update_device(dev); 1104 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr])); 1105 } 1106 1107 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr, 1108 char *buf) 1109 { 1110 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1111 int nr = sensor_attr->index; 1112 struct it87_data *data = it87_update_device(dev); 1113 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr])); 1114 } 1115 1116 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr, 1117 const char *buf, size_t count) 1118 { 1119 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1120 int nr = sensor_attr->index; 1121 struct it87_data *data = dev_get_drvdata(dev); 1122 long val; 1123 1124 if (strict_strtol(buf, 10, &val) < 0) 1125 return -EINVAL; 1126 1127 mutex_lock(&data->update_lock); 1128 data->fan_min[nr] = FAN16_TO_REG(val); 1129 it87_write_value(data, IT87_REG_FAN_MIN[nr], 1130 data->fan_min[nr] & 0xff); 1131 it87_write_value(data, IT87_REG_FANX_MIN[nr], 1132 data->fan_min[nr] >> 8); 1133 mutex_unlock(&data->update_lock); 1134 return count; 1135 } 1136 1137 /* We want to use the same sysfs file names as 8-bit fans, but we need 1138 different variable names, so we have to use SENSOR_ATTR instead of 1139 SENSOR_DEVICE_ATTR. */ 1140 #define show_fan16_offset(offset) \ 1141 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \ 1142 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \ 1143 show_fan16, NULL, offset - 1); \ 1144 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \ 1145 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 1146 show_fan16_min, set_fan16_min, offset - 1) 1147 1148 show_fan16_offset(1); 1149 show_fan16_offset(2); 1150 show_fan16_offset(3); 1151 show_fan16_offset(4); 1152 show_fan16_offset(5); 1153 1154 /* Alarms */ 1155 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 1156 char *buf) 1157 { 1158 struct it87_data *data = it87_update_device(dev); 1159 return sprintf(buf, "%u\n", data->alarms); 1160 } 1161 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 1162 1163 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 1164 char *buf) 1165 { 1166 int bitnr = to_sensor_dev_attr(attr)->index; 1167 struct it87_data *data = it87_update_device(dev); 1168 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 1169 } 1170 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8); 1171 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9); 1172 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10); 1173 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11); 1174 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12); 1175 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13); 1176 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14); 1177 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15); 1178 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0); 1179 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1); 1180 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2); 1181 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3); 1182 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6); 1183 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16); 1184 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17); 1185 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18); 1186 1187 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 1188 char *buf) 1189 { 1190 int bitnr = to_sensor_dev_attr(attr)->index; 1191 struct it87_data *data = it87_update_device(dev); 1192 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1); 1193 } 1194 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 1195 const char *buf, size_t count) 1196 { 1197 int bitnr = to_sensor_dev_attr(attr)->index; 1198 struct it87_data *data = dev_get_drvdata(dev); 1199 long val; 1200 1201 if (strict_strtol(buf, 10, &val) < 0 1202 || (val != 0 && val != 1)) 1203 return -EINVAL; 1204 1205 mutex_lock(&data->update_lock); 1206 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE); 1207 if (val) 1208 data->beeps |= (1 << bitnr); 1209 else 1210 data->beeps &= ~(1 << bitnr); 1211 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps); 1212 mutex_unlock(&data->update_lock); 1213 return count; 1214 } 1215 1216 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, 1217 show_beep, set_beep, 1); 1218 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1); 1219 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1); 1220 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1); 1221 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1); 1222 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1); 1223 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1); 1224 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1); 1225 /* fanX_beep writability is set later */ 1226 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0); 1227 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0); 1228 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0); 1229 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0); 1230 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0); 1231 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, 1232 show_beep, set_beep, 2); 1233 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2); 1234 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2); 1235 1236 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr, 1237 char *buf) 1238 { 1239 struct it87_data *data = dev_get_drvdata(dev); 1240 return sprintf(buf, "%u\n", data->vrm); 1241 } 1242 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr, 1243 const char *buf, size_t count) 1244 { 1245 struct it87_data *data = dev_get_drvdata(dev); 1246 unsigned long val; 1247 1248 if (strict_strtoul(buf, 10, &val) < 0) 1249 return -EINVAL; 1250 1251 data->vrm = val; 1252 1253 return count; 1254 } 1255 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 1256 1257 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr, 1258 char *buf) 1259 { 1260 struct it87_data *data = it87_update_device(dev); 1261 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 1262 } 1263 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 1264 1265 static ssize_t show_label(struct device *dev, struct device_attribute *attr, 1266 char *buf) 1267 { 1268 static const char *labels[] = { 1269 "+5V", 1270 "5VSB", 1271 "Vbat", 1272 }; 1273 static const char *labels_it8721[] = { 1274 "+3.3V", 1275 "3VSB", 1276 "Vbat", 1277 }; 1278 struct it87_data *data = dev_get_drvdata(dev); 1279 int nr = to_sensor_dev_attr(attr)->index; 1280 1281 return sprintf(buf, "%s\n", data->type == it8721 ? labels_it8721[nr] 1282 : labels[nr]); 1283 } 1284 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0); 1285 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1); 1286 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2); 1287 1288 static ssize_t show_name(struct device *dev, struct device_attribute 1289 *devattr, char *buf) 1290 { 1291 struct it87_data *data = dev_get_drvdata(dev); 1292 return sprintf(buf, "%s\n", data->name); 1293 } 1294 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 1295 1296 static struct attribute *it87_attributes[] = { 1297 &sensor_dev_attr_in0_input.dev_attr.attr, 1298 &sensor_dev_attr_in1_input.dev_attr.attr, 1299 &sensor_dev_attr_in2_input.dev_attr.attr, 1300 &sensor_dev_attr_in3_input.dev_attr.attr, 1301 &sensor_dev_attr_in4_input.dev_attr.attr, 1302 &sensor_dev_attr_in5_input.dev_attr.attr, 1303 &sensor_dev_attr_in6_input.dev_attr.attr, 1304 &sensor_dev_attr_in7_input.dev_attr.attr, 1305 &sensor_dev_attr_in8_input.dev_attr.attr, 1306 &sensor_dev_attr_in0_min.dev_attr.attr, 1307 &sensor_dev_attr_in1_min.dev_attr.attr, 1308 &sensor_dev_attr_in2_min.dev_attr.attr, 1309 &sensor_dev_attr_in3_min.dev_attr.attr, 1310 &sensor_dev_attr_in4_min.dev_attr.attr, 1311 &sensor_dev_attr_in5_min.dev_attr.attr, 1312 &sensor_dev_attr_in6_min.dev_attr.attr, 1313 &sensor_dev_attr_in7_min.dev_attr.attr, 1314 &sensor_dev_attr_in0_max.dev_attr.attr, 1315 &sensor_dev_attr_in1_max.dev_attr.attr, 1316 &sensor_dev_attr_in2_max.dev_attr.attr, 1317 &sensor_dev_attr_in3_max.dev_attr.attr, 1318 &sensor_dev_attr_in4_max.dev_attr.attr, 1319 &sensor_dev_attr_in5_max.dev_attr.attr, 1320 &sensor_dev_attr_in6_max.dev_attr.attr, 1321 &sensor_dev_attr_in7_max.dev_attr.attr, 1322 &sensor_dev_attr_in0_alarm.dev_attr.attr, 1323 &sensor_dev_attr_in1_alarm.dev_attr.attr, 1324 &sensor_dev_attr_in2_alarm.dev_attr.attr, 1325 &sensor_dev_attr_in3_alarm.dev_attr.attr, 1326 &sensor_dev_attr_in4_alarm.dev_attr.attr, 1327 &sensor_dev_attr_in5_alarm.dev_attr.attr, 1328 &sensor_dev_attr_in6_alarm.dev_attr.attr, 1329 &sensor_dev_attr_in7_alarm.dev_attr.attr, 1330 1331 &sensor_dev_attr_temp1_input.dev_attr.attr, 1332 &sensor_dev_attr_temp2_input.dev_attr.attr, 1333 &sensor_dev_attr_temp3_input.dev_attr.attr, 1334 &sensor_dev_attr_temp1_max.dev_attr.attr, 1335 &sensor_dev_attr_temp2_max.dev_attr.attr, 1336 &sensor_dev_attr_temp3_max.dev_attr.attr, 1337 &sensor_dev_attr_temp1_min.dev_attr.attr, 1338 &sensor_dev_attr_temp2_min.dev_attr.attr, 1339 &sensor_dev_attr_temp3_min.dev_attr.attr, 1340 &sensor_dev_attr_temp1_type.dev_attr.attr, 1341 &sensor_dev_attr_temp2_type.dev_attr.attr, 1342 &sensor_dev_attr_temp3_type.dev_attr.attr, 1343 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1344 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1345 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1346 1347 &dev_attr_alarms.attr, 1348 &dev_attr_name.attr, 1349 NULL 1350 }; 1351 1352 static const struct attribute_group it87_group = { 1353 .attrs = it87_attributes, 1354 }; 1355 1356 static struct attribute *it87_attributes_beep[] = { 1357 &sensor_dev_attr_in0_beep.dev_attr.attr, 1358 &sensor_dev_attr_in1_beep.dev_attr.attr, 1359 &sensor_dev_attr_in2_beep.dev_attr.attr, 1360 &sensor_dev_attr_in3_beep.dev_attr.attr, 1361 &sensor_dev_attr_in4_beep.dev_attr.attr, 1362 &sensor_dev_attr_in5_beep.dev_attr.attr, 1363 &sensor_dev_attr_in6_beep.dev_attr.attr, 1364 &sensor_dev_attr_in7_beep.dev_attr.attr, 1365 1366 &sensor_dev_attr_temp1_beep.dev_attr.attr, 1367 &sensor_dev_attr_temp2_beep.dev_attr.attr, 1368 &sensor_dev_attr_temp3_beep.dev_attr.attr, 1369 NULL 1370 }; 1371 1372 static const struct attribute_group it87_group_beep = { 1373 .attrs = it87_attributes_beep, 1374 }; 1375 1376 static struct attribute *it87_attributes_fan16[5][3+1] = { { 1377 &sensor_dev_attr_fan1_input16.dev_attr.attr, 1378 &sensor_dev_attr_fan1_min16.dev_attr.attr, 1379 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1380 NULL 1381 }, { 1382 &sensor_dev_attr_fan2_input16.dev_attr.attr, 1383 &sensor_dev_attr_fan2_min16.dev_attr.attr, 1384 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1385 NULL 1386 }, { 1387 &sensor_dev_attr_fan3_input16.dev_attr.attr, 1388 &sensor_dev_attr_fan3_min16.dev_attr.attr, 1389 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1390 NULL 1391 }, { 1392 &sensor_dev_attr_fan4_input16.dev_attr.attr, 1393 &sensor_dev_attr_fan4_min16.dev_attr.attr, 1394 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1395 NULL 1396 }, { 1397 &sensor_dev_attr_fan5_input16.dev_attr.attr, 1398 &sensor_dev_attr_fan5_min16.dev_attr.attr, 1399 &sensor_dev_attr_fan5_alarm.dev_attr.attr, 1400 NULL 1401 } }; 1402 1403 static const struct attribute_group it87_group_fan16[5] = { 1404 { .attrs = it87_attributes_fan16[0] }, 1405 { .attrs = it87_attributes_fan16[1] }, 1406 { .attrs = it87_attributes_fan16[2] }, 1407 { .attrs = it87_attributes_fan16[3] }, 1408 { .attrs = it87_attributes_fan16[4] }, 1409 }; 1410 1411 static struct attribute *it87_attributes_fan[3][4+1] = { { 1412 &sensor_dev_attr_fan1_input.dev_attr.attr, 1413 &sensor_dev_attr_fan1_min.dev_attr.attr, 1414 &sensor_dev_attr_fan1_div.dev_attr.attr, 1415 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1416 NULL 1417 }, { 1418 &sensor_dev_attr_fan2_input.dev_attr.attr, 1419 &sensor_dev_attr_fan2_min.dev_attr.attr, 1420 &sensor_dev_attr_fan2_div.dev_attr.attr, 1421 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1422 NULL 1423 }, { 1424 &sensor_dev_attr_fan3_input.dev_attr.attr, 1425 &sensor_dev_attr_fan3_min.dev_attr.attr, 1426 &sensor_dev_attr_fan3_div.dev_attr.attr, 1427 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1428 NULL 1429 } }; 1430 1431 static const struct attribute_group it87_group_fan[3] = { 1432 { .attrs = it87_attributes_fan[0] }, 1433 { .attrs = it87_attributes_fan[1] }, 1434 { .attrs = it87_attributes_fan[2] }, 1435 }; 1436 1437 static const struct attribute_group * 1438 it87_get_fan_group(const struct it87_data *data) 1439 { 1440 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan; 1441 } 1442 1443 static struct attribute *it87_attributes_pwm[3][4+1] = { { 1444 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1445 &sensor_dev_attr_pwm1.dev_attr.attr, 1446 &dev_attr_pwm1_freq.attr, 1447 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, 1448 NULL 1449 }, { 1450 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1451 &sensor_dev_attr_pwm2.dev_attr.attr, 1452 &dev_attr_pwm2_freq.attr, 1453 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr, 1454 NULL 1455 }, { 1456 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1457 &sensor_dev_attr_pwm3.dev_attr.attr, 1458 &dev_attr_pwm3_freq.attr, 1459 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, 1460 NULL 1461 } }; 1462 1463 static const struct attribute_group it87_group_pwm[3] = { 1464 { .attrs = it87_attributes_pwm[0] }, 1465 { .attrs = it87_attributes_pwm[1] }, 1466 { .attrs = it87_attributes_pwm[2] }, 1467 }; 1468 1469 static struct attribute *it87_attributes_autopwm[3][9+1] = { { 1470 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1471 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1472 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 1473 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 1474 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 1475 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 1476 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 1477 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 1478 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 1479 NULL 1480 }, { 1481 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, 1482 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, 1483 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr, 1484 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr, 1485 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr, 1486 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr, 1487 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr, 1488 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr, 1489 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr, 1490 NULL 1491 }, { 1492 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, 1493 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, 1494 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr, 1495 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr, 1496 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr, 1497 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr, 1498 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr, 1499 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr, 1500 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr, 1501 NULL 1502 } }; 1503 1504 static const struct attribute_group it87_group_autopwm[3] = { 1505 { .attrs = it87_attributes_autopwm[0] }, 1506 { .attrs = it87_attributes_autopwm[1] }, 1507 { .attrs = it87_attributes_autopwm[2] }, 1508 }; 1509 1510 static struct attribute *it87_attributes_fan_beep[] = { 1511 &sensor_dev_attr_fan1_beep.dev_attr.attr, 1512 &sensor_dev_attr_fan2_beep.dev_attr.attr, 1513 &sensor_dev_attr_fan3_beep.dev_attr.attr, 1514 &sensor_dev_attr_fan4_beep.dev_attr.attr, 1515 &sensor_dev_attr_fan5_beep.dev_attr.attr, 1516 }; 1517 1518 static struct attribute *it87_attributes_vid[] = { 1519 &dev_attr_vrm.attr, 1520 &dev_attr_cpu0_vid.attr, 1521 NULL 1522 }; 1523 1524 static const struct attribute_group it87_group_vid = { 1525 .attrs = it87_attributes_vid, 1526 }; 1527 1528 static struct attribute *it87_attributes_label[] = { 1529 &sensor_dev_attr_in3_label.dev_attr.attr, 1530 &sensor_dev_attr_in7_label.dev_attr.attr, 1531 &sensor_dev_attr_in8_label.dev_attr.attr, 1532 NULL 1533 }; 1534 1535 static const struct attribute_group it87_group_label = { 1536 .attrs = it87_attributes_vid, 1537 }; 1538 1539 /* SuperIO detection - will change isa_address if a chip is found */ 1540 static int __init it87_find(unsigned short *address, 1541 struct it87_sio_data *sio_data) 1542 { 1543 int err = -ENODEV; 1544 u16 chip_type; 1545 const char *board_vendor, *board_name; 1546 1547 superio_enter(); 1548 chip_type = force_id ? force_id : superio_inw(DEVID); 1549 1550 switch (chip_type) { 1551 case IT8705F_DEVID: 1552 sio_data->type = it87; 1553 break; 1554 case IT8712F_DEVID: 1555 sio_data->type = it8712; 1556 break; 1557 case IT8716F_DEVID: 1558 case IT8726F_DEVID: 1559 sio_data->type = it8716; 1560 break; 1561 case IT8718F_DEVID: 1562 sio_data->type = it8718; 1563 break; 1564 case IT8720F_DEVID: 1565 sio_data->type = it8720; 1566 break; 1567 case IT8721F_DEVID: 1568 sio_data->type = it8721; 1569 break; 1570 case 0xffff: /* No device at all */ 1571 goto exit; 1572 default: 1573 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n", 1574 chip_type); 1575 goto exit; 1576 } 1577 1578 superio_select(PME); 1579 if (!(superio_inb(IT87_ACT_REG) & 0x01)) { 1580 pr_info("it87: Device not activated, skipping\n"); 1581 goto exit; 1582 } 1583 1584 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); 1585 if (*address == 0) { 1586 pr_info("it87: Base address not set, skipping\n"); 1587 goto exit; 1588 } 1589 1590 err = 0; 1591 sio_data->revision = superio_inb(DEVREV) & 0x0f; 1592 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n", 1593 chip_type, *address, sio_data->revision); 1594 1595 /* in8 (Vbat) is always internal */ 1596 sio_data->internal = (1 << 2); 1597 1598 /* Read GPIO config and VID value from LDN 7 (GPIO) */ 1599 if (sio_data->type == it87) { 1600 /* The IT8705F doesn't have VID pins at all */ 1601 sio_data->skip_vid = 1; 1602 1603 /* The IT8705F has a different LD number for GPIO */ 1604 superio_select(5); 1605 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1606 } else { 1607 int reg; 1608 1609 superio_select(GPIO); 1610 1611 reg = superio_inb(IT87_SIO_GPIO3_REG); 1612 if (sio_data->type == it8721) { 1613 /* The IT8721F/IT8758E doesn't have VID pins at all */ 1614 sio_data->skip_vid = 1; 1615 } else { 1616 /* We need at least 4 VID pins */ 1617 if (reg & 0x0f) { 1618 pr_info("it87: VID is disabled (pins used for GPIO)\n"); 1619 sio_data->skip_vid = 1; 1620 } 1621 } 1622 1623 /* Check if fan3 is there or not */ 1624 if (reg & (1 << 6)) 1625 sio_data->skip_pwm |= (1 << 2); 1626 if (reg & (1 << 7)) 1627 sio_data->skip_fan |= (1 << 2); 1628 1629 /* Check if fan2 is there or not */ 1630 reg = superio_inb(IT87_SIO_GPIO5_REG); 1631 if (reg & (1 << 1)) 1632 sio_data->skip_pwm |= (1 << 1); 1633 if (reg & (1 << 2)) 1634 sio_data->skip_fan |= (1 << 1); 1635 1636 if ((sio_data->type == it8718 || sio_data->type == it8720) 1637 && !(sio_data->skip_vid)) 1638 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG); 1639 1640 reg = superio_inb(IT87_SIO_PINX2_REG); 1641 /* 1642 * The IT8720F has no VIN7 pin, so VCCH should always be 1643 * routed internally to VIN7 with an internal divider. 1644 * Curiously, there still is a configuration bit to control 1645 * this, which means it can be set incorrectly. And even 1646 * more curiously, many boards out there are improperly 1647 * configured, even though the IT8720F datasheet claims 1648 * that the internal routing of VCCH to VIN7 is the default 1649 * setting. So we force the internal routing in this case. 1650 */ 1651 if (sio_data->type == it8720 && !(reg & (1 << 1))) { 1652 reg |= (1 << 1); 1653 superio_outb(IT87_SIO_PINX2_REG, reg); 1654 pr_notice("it87: Routing internal VCCH to in7\n"); 1655 } 1656 if (reg & (1 << 0)) 1657 sio_data->internal |= (1 << 0); 1658 if ((reg & (1 << 1)) || sio_data->type == it8721) 1659 sio_data->internal |= (1 << 1); 1660 1661 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1662 } 1663 if (sio_data->beep_pin) 1664 pr_info("it87: Beeping is supported\n"); 1665 1666 /* Disable specific features based on DMI strings */ 1667 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR); 1668 board_name = dmi_get_system_info(DMI_BOARD_NAME); 1669 if (board_vendor && board_name) { 1670 if (strcmp(board_vendor, "nVIDIA") == 0 1671 && strcmp(board_name, "FN68PT") == 0) { 1672 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not 1673 connected to a fan, but to something else. One user 1674 has reported instant system power-off when changing 1675 the PWM2 duty cycle, so we disable it. 1676 I use the board name string as the trigger in case 1677 the same board is ever used in other systems. */ 1678 pr_info("it87: Disabling pwm2 due to " 1679 "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 printk(KERN_ERR DRVNAME ": Device allocation failed\n"); 2193 goto exit; 2194 } 2195 2196 err = platform_device_add_resources(pdev, &res, 1); 2197 if (err) { 2198 printk(KERN_ERR DRVNAME ": Device resource addition failed " 2199 "(%d)\n", err); 2200 goto exit_device_put; 2201 } 2202 2203 err = platform_device_add_data(pdev, sio_data, 2204 sizeof(struct it87_sio_data)); 2205 if (err) { 2206 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n"); 2207 goto exit_device_put; 2208 } 2209 2210 err = platform_device_add(pdev); 2211 if (err) { 2212 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", 2213 err); 2214 goto exit_device_put; 2215 } 2216 2217 return 0; 2218 2219 exit_device_put: 2220 platform_device_put(pdev); 2221 exit: 2222 return err; 2223 } 2224 2225 static int __init sm_it87_init(void) 2226 { 2227 int err; 2228 unsigned short isa_address = 0; 2229 struct it87_sio_data sio_data; 2230 2231 memset(&sio_data, 0, sizeof(struct it87_sio_data)); 2232 err = it87_find(&isa_address, &sio_data); 2233 if (err) 2234 return err; 2235 err = platform_driver_register(&it87_driver); 2236 if (err) 2237 return err; 2238 2239 err = it87_device_add(isa_address, &sio_data); 2240 if (err) { 2241 platform_driver_unregister(&it87_driver); 2242 return err; 2243 } 2244 2245 return 0; 2246 } 2247 2248 static void __exit sm_it87_exit(void) 2249 { 2250 platform_device_unregister(pdev); 2251 platform_driver_unregister(&it87_driver); 2252 } 2253 2254 2255 MODULE_AUTHOR("Chris Gauthron, " 2256 "Jean Delvare <khali@linux-fr.org>"); 2257 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver"); 2258 module_param(update_vbat, bool, 0); 2259 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); 2260 module_param(fix_pwm_polarity, bool, 0); 2261 MODULE_PARM_DESC(fix_pwm_polarity, 2262 "Force PWM polarity to active high (DANGEROUS)"); 2263 MODULE_LICENSE("GPL"); 2264 2265 module_init(sm_it87_init); 2266 module_exit(sm_it87_exit); 2267