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 * IT8726F Super I/O chip w/LPC interface 19 * Sis950 A clone of the IT8705F 20 * 21 * Copyright (C) 2001 Chris Gauthron 22 * Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org> 23 * 24 * This program is free software; you can redistribute it and/or modify 25 * it under the terms of the GNU General Public License as published by 26 * the Free Software Foundation; either version 2 of the License, or 27 * (at your option) any later version. 28 * 29 * This program is distributed in the hope that it will be useful, 30 * but WITHOUT ANY WARRANTY; without even the implied warranty of 31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 32 * GNU General Public License for more details. 33 * 34 * You should have received a copy of the GNU General Public License 35 * along with this program; if not, write to the Free Software 36 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 37 */ 38 39 #include <linux/module.h> 40 #include <linux/init.h> 41 #include <linux/slab.h> 42 #include <linux/jiffies.h> 43 #include <linux/platform_device.h> 44 #include <linux/hwmon.h> 45 #include <linux/hwmon-sysfs.h> 46 #include <linux/hwmon-vid.h> 47 #include <linux/err.h> 48 #include <linux/mutex.h> 49 #include <linux/sysfs.h> 50 #include <linux/string.h> 51 #include <linux/dmi.h> 52 #include <linux/acpi.h> 53 #include <linux/io.h> 54 55 #define DRVNAME "it87" 56 57 enum chips { it87, it8712, it8716, it8718, it8720 }; 58 59 static unsigned short force_id; 60 module_param(force_id, ushort, 0); 61 MODULE_PARM_DESC(force_id, "Override the detected device ID"); 62 63 static struct platform_device *pdev; 64 65 #define REG 0x2e /* The register to read/write */ 66 #define DEV 0x07 /* Register: Logical device select */ 67 #define VAL 0x2f /* The value to read/write */ 68 #define PME 0x04 /* The device with the fan registers in it */ 69 70 /* The device with the IT8718F/IT8720F VID value in it */ 71 #define GPIO 0x07 72 73 #define DEVID 0x20 /* Register: Device ID */ 74 #define DEVREV 0x22 /* Register: Device Revision */ 75 76 static inline int 77 superio_inb(int reg) 78 { 79 outb(reg, REG); 80 return inb(VAL); 81 } 82 83 static int superio_inw(int reg) 84 { 85 int val; 86 outb(reg++, REG); 87 val = inb(VAL) << 8; 88 outb(reg, REG); 89 val |= inb(VAL); 90 return val; 91 } 92 93 static inline void 94 superio_select(int ldn) 95 { 96 outb(DEV, REG); 97 outb(ldn, VAL); 98 } 99 100 static inline void 101 superio_enter(void) 102 { 103 outb(0x87, REG); 104 outb(0x01, REG); 105 outb(0x55, REG); 106 outb(0x55, REG); 107 } 108 109 static inline void 110 superio_exit(void) 111 { 112 outb(0x02, REG); 113 outb(0x02, VAL); 114 } 115 116 /* Logical device 4 registers */ 117 #define IT8712F_DEVID 0x8712 118 #define IT8705F_DEVID 0x8705 119 #define IT8716F_DEVID 0x8716 120 #define IT8718F_DEVID 0x8718 121 #define IT8720F_DEVID 0x8720 122 #define IT8726F_DEVID 0x8726 123 #define IT87_ACT_REG 0x30 124 #define IT87_BASE_REG 0x60 125 126 /* Logical device 7 registers (IT8712F and later) */ 127 #define IT87_SIO_GPIO3_REG 0x27 128 #define IT87_SIO_GPIO5_REG 0x29 129 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */ 130 #define IT87_SIO_VID_REG 0xfc /* VID value */ 131 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */ 132 133 /* Update battery voltage after every reading if true */ 134 static int update_vbat; 135 136 /* Not all BIOSes properly configure the PWM registers */ 137 static int fix_pwm_polarity; 138 139 /* Many IT87 constants specified below */ 140 141 /* Length of ISA address segment */ 142 #define IT87_EXTENT 8 143 144 /* Length of ISA address segment for Environmental Controller */ 145 #define IT87_EC_EXTENT 2 146 147 /* Offset of EC registers from ISA base address */ 148 #define IT87_EC_OFFSET 5 149 150 /* Where are the ISA address/data registers relative to the EC base address */ 151 #define IT87_ADDR_REG_OFFSET 0 152 #define IT87_DATA_REG_OFFSET 1 153 154 /*----- The IT87 registers -----*/ 155 156 #define IT87_REG_CONFIG 0x00 157 158 #define IT87_REG_ALARM1 0x01 159 #define IT87_REG_ALARM2 0x02 160 #define IT87_REG_ALARM3 0x03 161 162 /* The IT8718F and IT8720F have the VID value in a different register, in 163 Super-I/O configuration space. */ 164 #define IT87_REG_VID 0x0a 165 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b 166 for fan divisors. Later IT8712F revisions must use 16-bit tachometer 167 mode. */ 168 #define IT87_REG_FAN_DIV 0x0b 169 #define IT87_REG_FAN_16BIT 0x0c 170 171 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */ 172 173 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 }; 174 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 }; 175 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 }; 176 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 }; 177 #define IT87_REG_FAN_MAIN_CTRL 0x13 178 #define IT87_REG_FAN_CTL 0x14 179 #define IT87_REG_PWM(nr) (0x15 + (nr)) 180 181 #define IT87_REG_VIN(nr) (0x20 + (nr)) 182 #define IT87_REG_TEMP(nr) (0x29 + (nr)) 183 184 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2) 185 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2) 186 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2) 187 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2) 188 189 #define IT87_REG_VIN_ENABLE 0x50 190 #define IT87_REG_TEMP_ENABLE 0x51 191 #define IT87_REG_BEEP_ENABLE 0x5c 192 193 #define IT87_REG_CHIPID 0x58 194 195 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i)) 196 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i)) 197 198 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255)) 199 #define IN_FROM_REG(val) ((val) * 16) 200 201 static inline u8 FAN_TO_REG(long rpm, int div) 202 { 203 if (rpm == 0) 204 return 255; 205 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 206 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 207 254); 208 } 209 210 static inline u16 FAN16_TO_REG(long rpm) 211 { 212 if (rpm == 0) 213 return 0xffff; 214 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe); 215 } 216 217 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div))) 218 /* The divider is fixed to 2 in 16-bit mode */ 219 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2)) 220 221 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\ 222 ((val)+500)/1000),-128,127)) 223 #define TEMP_FROM_REG(val) ((val) * 1000) 224 225 #define PWM_TO_REG(val) ((val) >> 1) 226 #define PWM_FROM_REG(val) (((val)&0x7f) << 1) 227 228 static int DIV_TO_REG(int val) 229 { 230 int answer = 0; 231 while (answer < 7 && (val >>= 1)) 232 answer++; 233 return answer; 234 } 235 #define DIV_FROM_REG(val) (1 << (val)) 236 237 static const unsigned int pwm_freq[8] = { 238 48000000 / 128, 239 24000000 / 128, 240 12000000 / 128, 241 8000000 / 128, 242 6000000 / 128, 243 3000000 / 128, 244 1500000 / 128, 245 750000 / 128, 246 }; 247 248 249 struct it87_sio_data { 250 enum chips type; 251 /* Values read from Super-I/O config space */ 252 u8 revision; 253 u8 vid_value; 254 u8 beep_pin; 255 /* Features skipped based on config or DMI */ 256 u8 skip_vid; 257 u8 skip_fan; 258 u8 skip_pwm; 259 }; 260 261 /* For each registered chip, we need to keep some data in memory. 262 The structure is dynamically allocated. */ 263 struct it87_data { 264 struct device *hwmon_dev; 265 enum chips type; 266 u8 revision; 267 268 unsigned short addr; 269 const char *name; 270 struct mutex update_lock; 271 char valid; /* !=0 if following fields are valid */ 272 unsigned long last_updated; /* In jiffies */ 273 274 u8 in[9]; /* Register value */ 275 u8 in_max[8]; /* Register value */ 276 u8 in_min[8]; /* Register value */ 277 u8 has_fan; /* Bitfield, fans enabled */ 278 u16 fan[5]; /* Register values, possibly combined */ 279 u16 fan_min[5]; /* Register values, possibly combined */ 280 s8 temp[3]; /* Register value */ 281 s8 temp_high[3]; /* Register value */ 282 s8 temp_low[3]; /* Register value */ 283 u8 sensor; /* Register value */ 284 u8 fan_div[3]; /* Register encoding, shifted right */ 285 u8 vid; /* Register encoding, combined */ 286 u8 vrm; 287 u32 alarms; /* Register encoding, combined */ 288 u8 beeps; /* Register encoding */ 289 u8 fan_main_ctrl; /* Register value */ 290 u8 fan_ctl; /* Register value */ 291 292 /* The following 3 arrays correspond to the same registers. The 293 * meaning of bits 6-0 depends on the value of bit 7, and we want 294 * to preserve settings on mode changes, so we have to track all 295 * values separately. */ 296 u8 pwm_ctrl[3]; /* Register value */ 297 u8 pwm_duty[3]; /* Manual PWM value set by user (bit 6-0) */ 298 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */ 299 300 /* Automatic fan speed control registers */ 301 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */ 302 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */ 303 }; 304 305 static inline int has_16bit_fans(const struct it87_data *data) 306 { 307 /* IT8705F Datasheet 0.4.1, 3h == Version G. 308 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J. 309 These are the first revisions with 16bit tachometer support. */ 310 return (data->type == it87 && data->revision >= 0x03) 311 || (data->type == it8712 && data->revision >= 0x08) 312 || data->type == it8716 313 || data->type == it8718 314 || data->type == it8720; 315 } 316 317 static inline int has_old_autopwm(const struct it87_data *data) 318 { 319 /* The old automatic fan speed control interface is implemented 320 by IT8705F chips up to revision F and IT8712F chips up to 321 revision G. */ 322 return (data->type == it87 && data->revision < 0x03) 323 || (data->type == it8712 && data->revision < 0x08); 324 } 325 326 static int it87_probe(struct platform_device *pdev); 327 static int __devexit it87_remove(struct platform_device *pdev); 328 329 static int it87_read_value(struct it87_data *data, u8 reg); 330 static void it87_write_value(struct it87_data *data, u8 reg, u8 value); 331 static struct it87_data *it87_update_device(struct device *dev); 332 static int it87_check_pwm(struct device *dev); 333 static void it87_init_device(struct platform_device *pdev); 334 335 336 static struct platform_driver it87_driver = { 337 .driver = { 338 .owner = THIS_MODULE, 339 .name = DRVNAME, 340 }, 341 .probe = it87_probe, 342 .remove = __devexit_p(it87_remove), 343 }; 344 345 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 346 char *buf) 347 { 348 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 349 int nr = sensor_attr->index; 350 351 struct it87_data *data = it87_update_device(dev); 352 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); 353 } 354 355 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 356 char *buf) 357 { 358 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 359 int nr = sensor_attr->index; 360 361 struct it87_data *data = it87_update_device(dev); 362 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); 363 } 364 365 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 366 char *buf) 367 { 368 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 369 int nr = sensor_attr->index; 370 371 struct it87_data *data = it87_update_device(dev); 372 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); 373 } 374 375 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 376 const char *buf, size_t count) 377 { 378 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 379 int nr = sensor_attr->index; 380 381 struct it87_data *data = dev_get_drvdata(dev); 382 unsigned long val; 383 384 if (strict_strtoul(buf, 10, &val) < 0) 385 return -EINVAL; 386 387 mutex_lock(&data->update_lock); 388 data->in_min[nr] = IN_TO_REG(val); 389 it87_write_value(data, IT87_REG_VIN_MIN(nr), 390 data->in_min[nr]); 391 mutex_unlock(&data->update_lock); 392 return count; 393 } 394 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 395 const char *buf, size_t count) 396 { 397 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 398 int nr = sensor_attr->index; 399 400 struct it87_data *data = dev_get_drvdata(dev); 401 unsigned long val; 402 403 if (strict_strtoul(buf, 10, &val) < 0) 404 return -EINVAL; 405 406 mutex_lock(&data->update_lock); 407 data->in_max[nr] = IN_TO_REG(val); 408 it87_write_value(data, IT87_REG_VIN_MAX(nr), 409 data->in_max[nr]); 410 mutex_unlock(&data->update_lock); 411 return count; 412 } 413 414 #define show_in_offset(offset) \ 415 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 416 show_in, NULL, offset); 417 418 #define limit_in_offset(offset) \ 419 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 420 show_in_min, set_in_min, offset); \ 421 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 422 show_in_max, set_in_max, offset); 423 424 show_in_offset(0); 425 limit_in_offset(0); 426 show_in_offset(1); 427 limit_in_offset(1); 428 show_in_offset(2); 429 limit_in_offset(2); 430 show_in_offset(3); 431 limit_in_offset(3); 432 show_in_offset(4); 433 limit_in_offset(4); 434 show_in_offset(5); 435 limit_in_offset(5); 436 show_in_offset(6); 437 limit_in_offset(6); 438 show_in_offset(7); 439 limit_in_offset(7); 440 show_in_offset(8); 441 442 /* 3 temperatures */ 443 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 444 char *buf) 445 { 446 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 447 int nr = sensor_attr->index; 448 449 struct it87_data *data = it87_update_device(dev); 450 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 451 } 452 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 453 char *buf) 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 = it87_update_device(dev); 459 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); 460 } 461 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 462 char *buf) 463 { 464 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 465 int nr = sensor_attr->index; 466 467 struct it87_data *data = it87_update_device(dev); 468 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); 469 } 470 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 471 const char *buf, size_t count) 472 { 473 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 474 int nr = sensor_attr->index; 475 476 struct it87_data *data = dev_get_drvdata(dev); 477 long val; 478 479 if (strict_strtol(buf, 10, &val) < 0) 480 return -EINVAL; 481 482 mutex_lock(&data->update_lock); 483 data->temp_high[nr] = TEMP_TO_REG(val); 484 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); 485 mutex_unlock(&data->update_lock); 486 return count; 487 } 488 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 489 const char *buf, size_t count) 490 { 491 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 492 int nr = sensor_attr->index; 493 494 struct it87_data *data = dev_get_drvdata(dev); 495 long val; 496 497 if (strict_strtol(buf, 10, &val) < 0) 498 return -EINVAL; 499 500 mutex_lock(&data->update_lock); 501 data->temp_low[nr] = TEMP_TO_REG(val); 502 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); 503 mutex_unlock(&data->update_lock); 504 return count; 505 } 506 #define show_temp_offset(offset) \ 507 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 508 show_temp, NULL, offset - 1); \ 509 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 510 show_temp_max, set_temp_max, offset - 1); \ 511 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 512 show_temp_min, set_temp_min, offset - 1); 513 514 show_temp_offset(1); 515 show_temp_offset(2); 516 show_temp_offset(3); 517 518 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, 519 char *buf) 520 { 521 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 522 int nr = sensor_attr->index; 523 524 struct it87_data *data = it87_update_device(dev); 525 u8 reg = data->sensor; /* In case the value is updated while 526 we use it */ 527 528 if (reg & (1 << nr)) 529 return sprintf(buf, "3\n"); /* thermal diode */ 530 if (reg & (8 << nr)) 531 return sprintf(buf, "4\n"); /* thermistor */ 532 return sprintf(buf, "0\n"); /* disabled */ 533 } 534 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, 535 const char *buf, size_t count) 536 { 537 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 538 int nr = sensor_attr->index; 539 540 struct it87_data *data = dev_get_drvdata(dev); 541 long val; 542 u8 reg; 543 544 if (strict_strtol(buf, 10, &val) < 0) 545 return -EINVAL; 546 547 reg = it87_read_value(data, IT87_REG_TEMP_ENABLE); 548 reg &= ~(1 << nr); 549 reg &= ~(8 << nr); 550 if (val == 2) { /* backwards compatibility */ 551 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 " 552 "instead\n"); 553 val = 4; 554 } 555 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */ 556 if (val == 3) 557 reg |= 1 << nr; 558 else if (val == 4) 559 reg |= 8 << nr; 560 else if (val != 0) 561 return -EINVAL; 562 563 mutex_lock(&data->update_lock); 564 data->sensor = reg; 565 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor); 566 data->valid = 0; /* Force cache refresh */ 567 mutex_unlock(&data->update_lock); 568 return count; 569 } 570 #define show_sensor_offset(offset) \ 571 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ 572 show_sensor, set_sensor, offset - 1); 573 574 show_sensor_offset(1); 575 show_sensor_offset(2); 576 show_sensor_offset(3); 577 578 /* 3 Fans */ 579 580 static int pwm_mode(const struct it87_data *data, int nr) 581 { 582 int ctrl = data->fan_main_ctrl & (1 << nr); 583 584 if (ctrl == 0) /* Full speed */ 585 return 0; 586 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */ 587 return 2; 588 else /* Manual mode */ 589 return 1; 590 } 591 592 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 593 char *buf) 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 = it87_update_device(dev); 599 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 600 DIV_FROM_REG(data->fan_div[nr]))); 601 } 602 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 603 char *buf) 604 { 605 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 606 int nr = sensor_attr->index; 607 608 struct it87_data *data = it87_update_device(dev); 609 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 610 DIV_FROM_REG(data->fan_div[nr]))); 611 } 612 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 613 char *buf) 614 { 615 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 616 int nr = sensor_attr->index; 617 618 struct it87_data *data = it87_update_device(dev); 619 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 620 } 621 static ssize_t show_pwm_enable(struct device *dev, 622 struct device_attribute *attr, char *buf) 623 { 624 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 625 int nr = sensor_attr->index; 626 627 struct it87_data *data = it87_update_device(dev); 628 return sprintf(buf, "%d\n", pwm_mode(data, nr)); 629 } 630 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 631 char *buf) 632 { 633 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 634 int nr = sensor_attr->index; 635 636 struct it87_data *data = it87_update_device(dev); 637 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm_duty[nr])); 638 } 639 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr, 640 char *buf) 641 { 642 struct it87_data *data = it87_update_device(dev); 643 int index = (data->fan_ctl >> 4) & 0x07; 644 645 return sprintf(buf, "%u\n", pwm_freq[index]); 646 } 647 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 648 const char *buf, size_t count) 649 { 650 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 651 int nr = sensor_attr->index; 652 653 struct it87_data *data = dev_get_drvdata(dev); 654 long val; 655 u8 reg; 656 657 if (strict_strtol(buf, 10, &val) < 0) 658 return -EINVAL; 659 660 mutex_lock(&data->update_lock); 661 reg = it87_read_value(data, IT87_REG_FAN_DIV); 662 switch (nr) { 663 case 0: 664 data->fan_div[nr] = reg & 0x07; 665 break; 666 case 1: 667 data->fan_div[nr] = (reg >> 3) & 0x07; 668 break; 669 case 2: 670 data->fan_div[nr] = (reg & 0x40) ? 3 : 1; 671 break; 672 } 673 674 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 675 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 676 mutex_unlock(&data->update_lock); 677 return count; 678 } 679 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 680 const char *buf, size_t count) 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 = dev_get_drvdata(dev); 686 unsigned long val; 687 int min; 688 u8 old; 689 690 if (strict_strtoul(buf, 10, &val) < 0) 691 return -EINVAL; 692 693 mutex_lock(&data->update_lock); 694 old = it87_read_value(data, IT87_REG_FAN_DIV); 695 696 /* Save fan min limit */ 697 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 698 699 switch (nr) { 700 case 0: 701 case 1: 702 data->fan_div[nr] = DIV_TO_REG(val); 703 break; 704 case 2: 705 if (val < 8) 706 data->fan_div[nr] = 1; 707 else 708 data->fan_div[nr] = 3; 709 } 710 val = old & 0x80; 711 val |= (data->fan_div[0] & 0x07); 712 val |= (data->fan_div[1] & 0x07) << 3; 713 if (data->fan_div[2] == 3) 714 val |= 0x1 << 6; 715 it87_write_value(data, IT87_REG_FAN_DIV, val); 716 717 /* Restore fan min limit */ 718 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 719 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 720 721 mutex_unlock(&data->update_lock); 722 return count; 723 } 724 725 /* Returns 0 if OK, -EINVAL otherwise */ 726 static int check_trip_points(struct device *dev, int nr) 727 { 728 const struct it87_data *data = dev_get_drvdata(dev); 729 int i, err = 0; 730 731 if (has_old_autopwm(data)) { 732 for (i = 0; i < 3; i++) { 733 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1]) 734 err = -EINVAL; 735 } 736 for (i = 0; i < 2; i++) { 737 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1]) 738 err = -EINVAL; 739 } 740 } 741 742 if (err) { 743 dev_err(dev, "Inconsistent trip points, not switching to " 744 "automatic mode\n"); 745 dev_err(dev, "Adjust the trip points and try again\n"); 746 } 747 return err; 748 } 749 750 static ssize_t set_pwm_enable(struct device *dev, 751 struct device_attribute *attr, const char *buf, size_t count) 752 { 753 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 754 int nr = sensor_attr->index; 755 756 struct it87_data *data = dev_get_drvdata(dev); 757 long val; 758 759 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2) 760 return -EINVAL; 761 762 /* Check trip points before switching to automatic mode */ 763 if (val == 2) { 764 if (check_trip_points(dev, nr) < 0) 765 return -EINVAL; 766 } 767 768 mutex_lock(&data->update_lock); 769 770 if (val == 0) { 771 int tmp; 772 /* make sure the fan is on when in on/off mode */ 773 tmp = it87_read_value(data, IT87_REG_FAN_CTL); 774 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr)); 775 /* set on/off mode */ 776 data->fan_main_ctrl &= ~(1 << nr); 777 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 778 data->fan_main_ctrl); 779 } else { 780 if (val == 1) /* Manual mode */ 781 data->pwm_ctrl[nr] = data->pwm_duty[nr]; 782 else /* Automatic mode */ 783 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 784 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 785 /* set SmartGuardian mode */ 786 data->fan_main_ctrl |= (1 << nr); 787 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 788 data->fan_main_ctrl); 789 } 790 791 mutex_unlock(&data->update_lock); 792 return count; 793 } 794 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 795 const char *buf, size_t count) 796 { 797 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 798 int nr = sensor_attr->index; 799 800 struct it87_data *data = dev_get_drvdata(dev); 801 long val; 802 803 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255) 804 return -EINVAL; 805 806 mutex_lock(&data->update_lock); 807 data->pwm_duty[nr] = PWM_TO_REG(val); 808 /* If we are in manual mode, write the duty cycle immediately; 809 * otherwise, just store it for later use. */ 810 if (!(data->pwm_ctrl[nr] & 0x80)) { 811 data->pwm_ctrl[nr] = data->pwm_duty[nr]; 812 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 813 } 814 mutex_unlock(&data->update_lock); 815 return count; 816 } 817 static ssize_t set_pwm_freq(struct device *dev, 818 struct device_attribute *attr, const char *buf, size_t count) 819 { 820 struct it87_data *data = dev_get_drvdata(dev); 821 unsigned long val; 822 int i; 823 824 if (strict_strtoul(buf, 10, &val) < 0) 825 return -EINVAL; 826 827 /* Search for the nearest available frequency */ 828 for (i = 0; i < 7; i++) { 829 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2) 830 break; 831 } 832 833 mutex_lock(&data->update_lock); 834 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f; 835 data->fan_ctl |= i << 4; 836 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl); 837 mutex_unlock(&data->update_lock); 838 839 return count; 840 } 841 static ssize_t show_pwm_temp_map(struct device *dev, 842 struct device_attribute *attr, char *buf) 843 { 844 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 845 int nr = sensor_attr->index; 846 847 struct it87_data *data = it87_update_device(dev); 848 int map; 849 850 if (data->pwm_temp_map[nr] < 3) 851 map = 1 << data->pwm_temp_map[nr]; 852 else 853 map = 0; /* Should never happen */ 854 return sprintf(buf, "%d\n", map); 855 } 856 static ssize_t set_pwm_temp_map(struct device *dev, 857 struct device_attribute *attr, const char *buf, size_t count) 858 { 859 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 860 int nr = sensor_attr->index; 861 862 struct it87_data *data = dev_get_drvdata(dev); 863 long val; 864 u8 reg; 865 866 /* This check can go away if we ever support automatic fan speed 867 control on newer chips. */ 868 if (!has_old_autopwm(data)) { 869 dev_notice(dev, "Mapping change disabled for safety reasons\n"); 870 return -EINVAL; 871 } 872 873 if (strict_strtol(buf, 10, &val) < 0) 874 return -EINVAL; 875 876 switch (val) { 877 case (1 << 0): 878 reg = 0x00; 879 break; 880 case (1 << 1): 881 reg = 0x01; 882 break; 883 case (1 << 2): 884 reg = 0x02; 885 break; 886 default: 887 return -EINVAL; 888 } 889 890 mutex_lock(&data->update_lock); 891 data->pwm_temp_map[nr] = reg; 892 /* If we are in automatic mode, write the temp mapping immediately; 893 * otherwise, just store it for later use. */ 894 if (data->pwm_ctrl[nr] & 0x80) { 895 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 896 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 897 } 898 mutex_unlock(&data->update_lock); 899 return count; 900 } 901 902 static ssize_t show_auto_pwm(struct device *dev, 903 struct device_attribute *attr, char *buf) 904 { 905 struct it87_data *data = it87_update_device(dev); 906 struct sensor_device_attribute_2 *sensor_attr = 907 to_sensor_dev_attr_2(attr); 908 int nr = sensor_attr->nr; 909 int point = sensor_attr->index; 910 911 return sprintf(buf, "%d\n", PWM_FROM_REG(data->auto_pwm[nr][point])); 912 } 913 914 static ssize_t set_auto_pwm(struct device *dev, 915 struct device_attribute *attr, const char *buf, size_t count) 916 { 917 struct it87_data *data = dev_get_drvdata(dev); 918 struct sensor_device_attribute_2 *sensor_attr = 919 to_sensor_dev_attr_2(attr); 920 int nr = sensor_attr->nr; 921 int point = sensor_attr->index; 922 long val; 923 924 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255) 925 return -EINVAL; 926 927 mutex_lock(&data->update_lock); 928 data->auto_pwm[nr][point] = PWM_TO_REG(val); 929 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point), 930 data->auto_pwm[nr][point]); 931 mutex_unlock(&data->update_lock); 932 return count; 933 } 934 935 static ssize_t show_auto_temp(struct device *dev, 936 struct device_attribute *attr, char *buf) 937 { 938 struct it87_data *data = it87_update_device(dev); 939 struct sensor_device_attribute_2 *sensor_attr = 940 to_sensor_dev_attr_2(attr); 941 int nr = sensor_attr->nr; 942 int point = sensor_attr->index; 943 944 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point])); 945 } 946 947 static ssize_t set_auto_temp(struct device *dev, 948 struct device_attribute *attr, const char *buf, size_t count) 949 { 950 struct it87_data *data = dev_get_drvdata(dev); 951 struct sensor_device_attribute_2 *sensor_attr = 952 to_sensor_dev_attr_2(attr); 953 int nr = sensor_attr->nr; 954 int point = sensor_attr->index; 955 long val; 956 957 if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000) 958 return -EINVAL; 959 960 mutex_lock(&data->update_lock); 961 data->auto_temp[nr][point] = TEMP_TO_REG(val); 962 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point), 963 data->auto_temp[nr][point]); 964 mutex_unlock(&data->update_lock); 965 return count; 966 } 967 968 #define show_fan_offset(offset) \ 969 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 970 show_fan, NULL, offset - 1); \ 971 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 972 show_fan_min, set_fan_min, offset - 1); \ 973 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 974 show_fan_div, set_fan_div, offset - 1); 975 976 show_fan_offset(1); 977 show_fan_offset(2); 978 show_fan_offset(3); 979 980 #define show_pwm_offset(offset) \ 981 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 982 show_pwm_enable, set_pwm_enable, offset - 1); \ 983 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 984 show_pwm, set_pwm, offset - 1); \ 985 static DEVICE_ATTR(pwm##offset##_freq, \ 986 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \ 987 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \ 988 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \ 989 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \ 990 offset - 1); \ 991 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \ 992 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 993 offset - 1, 0); \ 994 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \ 995 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 996 offset - 1, 1); \ 997 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \ 998 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 999 offset - 1, 2); \ 1000 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \ 1001 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \ 1002 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \ 1003 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1004 offset - 1, 1); \ 1005 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \ 1006 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1007 offset - 1, 0); \ 1008 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \ 1009 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1010 offset - 1, 2); \ 1011 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \ 1012 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1013 offset - 1, 3); \ 1014 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \ 1015 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1016 offset - 1, 4); 1017 1018 show_pwm_offset(1); 1019 show_pwm_offset(2); 1020 show_pwm_offset(3); 1021 1022 /* A different set of callbacks for 16-bit fans */ 1023 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr, 1024 char *buf) 1025 { 1026 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1027 int nr = sensor_attr->index; 1028 struct it87_data *data = it87_update_device(dev); 1029 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr])); 1030 } 1031 1032 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr, 1033 char *buf) 1034 { 1035 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1036 int nr = sensor_attr->index; 1037 struct it87_data *data = it87_update_device(dev); 1038 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr])); 1039 } 1040 1041 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr, 1042 const char *buf, size_t count) 1043 { 1044 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1045 int nr = sensor_attr->index; 1046 struct it87_data *data = dev_get_drvdata(dev); 1047 long val; 1048 1049 if (strict_strtol(buf, 10, &val) < 0) 1050 return -EINVAL; 1051 1052 mutex_lock(&data->update_lock); 1053 data->fan_min[nr] = FAN16_TO_REG(val); 1054 it87_write_value(data, IT87_REG_FAN_MIN[nr], 1055 data->fan_min[nr] & 0xff); 1056 it87_write_value(data, IT87_REG_FANX_MIN[nr], 1057 data->fan_min[nr] >> 8); 1058 mutex_unlock(&data->update_lock); 1059 return count; 1060 } 1061 1062 /* We want to use the same sysfs file names as 8-bit fans, but we need 1063 different variable names, so we have to use SENSOR_ATTR instead of 1064 SENSOR_DEVICE_ATTR. */ 1065 #define show_fan16_offset(offset) \ 1066 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \ 1067 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \ 1068 show_fan16, NULL, offset - 1); \ 1069 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \ 1070 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 1071 show_fan16_min, set_fan16_min, offset - 1) 1072 1073 show_fan16_offset(1); 1074 show_fan16_offset(2); 1075 show_fan16_offset(3); 1076 show_fan16_offset(4); 1077 show_fan16_offset(5); 1078 1079 /* Alarms */ 1080 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 1081 char *buf) 1082 { 1083 struct it87_data *data = it87_update_device(dev); 1084 return sprintf(buf, "%u\n", data->alarms); 1085 } 1086 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 1087 1088 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 1089 char *buf) 1090 { 1091 int bitnr = to_sensor_dev_attr(attr)->index; 1092 struct it87_data *data = it87_update_device(dev); 1093 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 1094 } 1095 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8); 1096 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9); 1097 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10); 1098 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11); 1099 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12); 1100 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13); 1101 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14); 1102 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15); 1103 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0); 1104 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1); 1105 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2); 1106 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3); 1107 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6); 1108 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16); 1109 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17); 1110 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18); 1111 1112 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 1113 char *buf) 1114 { 1115 int bitnr = to_sensor_dev_attr(attr)->index; 1116 struct it87_data *data = it87_update_device(dev); 1117 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1); 1118 } 1119 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 1120 const char *buf, size_t count) 1121 { 1122 int bitnr = to_sensor_dev_attr(attr)->index; 1123 struct it87_data *data = dev_get_drvdata(dev); 1124 long val; 1125 1126 if (strict_strtol(buf, 10, &val) < 0 1127 || (val != 0 && val != 1)) 1128 return -EINVAL; 1129 1130 mutex_lock(&data->update_lock); 1131 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE); 1132 if (val) 1133 data->beeps |= (1 << bitnr); 1134 else 1135 data->beeps &= ~(1 << bitnr); 1136 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps); 1137 mutex_unlock(&data->update_lock); 1138 return count; 1139 } 1140 1141 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, 1142 show_beep, set_beep, 1); 1143 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1); 1144 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1); 1145 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1); 1146 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1); 1147 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1); 1148 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1); 1149 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1); 1150 /* fanX_beep writability is set later */ 1151 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0); 1152 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0); 1153 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0); 1154 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0); 1155 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0); 1156 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, 1157 show_beep, set_beep, 2); 1158 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2); 1159 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2); 1160 1161 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr, 1162 char *buf) 1163 { 1164 struct it87_data *data = dev_get_drvdata(dev); 1165 return sprintf(buf, "%u\n", data->vrm); 1166 } 1167 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr, 1168 const char *buf, size_t count) 1169 { 1170 struct it87_data *data = dev_get_drvdata(dev); 1171 unsigned long val; 1172 1173 if (strict_strtoul(buf, 10, &val) < 0) 1174 return -EINVAL; 1175 1176 data->vrm = val; 1177 1178 return count; 1179 } 1180 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 1181 1182 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr, 1183 char *buf) 1184 { 1185 struct it87_data *data = it87_update_device(dev); 1186 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 1187 } 1188 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 1189 1190 static ssize_t show_name(struct device *dev, struct device_attribute 1191 *devattr, char *buf) 1192 { 1193 struct it87_data *data = dev_get_drvdata(dev); 1194 return sprintf(buf, "%s\n", data->name); 1195 } 1196 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 1197 1198 static struct attribute *it87_attributes[] = { 1199 &sensor_dev_attr_in0_input.dev_attr.attr, 1200 &sensor_dev_attr_in1_input.dev_attr.attr, 1201 &sensor_dev_attr_in2_input.dev_attr.attr, 1202 &sensor_dev_attr_in3_input.dev_attr.attr, 1203 &sensor_dev_attr_in4_input.dev_attr.attr, 1204 &sensor_dev_attr_in5_input.dev_attr.attr, 1205 &sensor_dev_attr_in6_input.dev_attr.attr, 1206 &sensor_dev_attr_in7_input.dev_attr.attr, 1207 &sensor_dev_attr_in8_input.dev_attr.attr, 1208 &sensor_dev_attr_in0_min.dev_attr.attr, 1209 &sensor_dev_attr_in1_min.dev_attr.attr, 1210 &sensor_dev_attr_in2_min.dev_attr.attr, 1211 &sensor_dev_attr_in3_min.dev_attr.attr, 1212 &sensor_dev_attr_in4_min.dev_attr.attr, 1213 &sensor_dev_attr_in5_min.dev_attr.attr, 1214 &sensor_dev_attr_in6_min.dev_attr.attr, 1215 &sensor_dev_attr_in7_min.dev_attr.attr, 1216 &sensor_dev_attr_in0_max.dev_attr.attr, 1217 &sensor_dev_attr_in1_max.dev_attr.attr, 1218 &sensor_dev_attr_in2_max.dev_attr.attr, 1219 &sensor_dev_attr_in3_max.dev_attr.attr, 1220 &sensor_dev_attr_in4_max.dev_attr.attr, 1221 &sensor_dev_attr_in5_max.dev_attr.attr, 1222 &sensor_dev_attr_in6_max.dev_attr.attr, 1223 &sensor_dev_attr_in7_max.dev_attr.attr, 1224 &sensor_dev_attr_in0_alarm.dev_attr.attr, 1225 &sensor_dev_attr_in1_alarm.dev_attr.attr, 1226 &sensor_dev_attr_in2_alarm.dev_attr.attr, 1227 &sensor_dev_attr_in3_alarm.dev_attr.attr, 1228 &sensor_dev_attr_in4_alarm.dev_attr.attr, 1229 &sensor_dev_attr_in5_alarm.dev_attr.attr, 1230 &sensor_dev_attr_in6_alarm.dev_attr.attr, 1231 &sensor_dev_attr_in7_alarm.dev_attr.attr, 1232 1233 &sensor_dev_attr_temp1_input.dev_attr.attr, 1234 &sensor_dev_attr_temp2_input.dev_attr.attr, 1235 &sensor_dev_attr_temp3_input.dev_attr.attr, 1236 &sensor_dev_attr_temp1_max.dev_attr.attr, 1237 &sensor_dev_attr_temp2_max.dev_attr.attr, 1238 &sensor_dev_attr_temp3_max.dev_attr.attr, 1239 &sensor_dev_attr_temp1_min.dev_attr.attr, 1240 &sensor_dev_attr_temp2_min.dev_attr.attr, 1241 &sensor_dev_attr_temp3_min.dev_attr.attr, 1242 &sensor_dev_attr_temp1_type.dev_attr.attr, 1243 &sensor_dev_attr_temp2_type.dev_attr.attr, 1244 &sensor_dev_attr_temp3_type.dev_attr.attr, 1245 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1246 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1247 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1248 1249 &dev_attr_alarms.attr, 1250 &dev_attr_name.attr, 1251 NULL 1252 }; 1253 1254 static const struct attribute_group it87_group = { 1255 .attrs = it87_attributes, 1256 }; 1257 1258 static struct attribute *it87_attributes_beep[] = { 1259 &sensor_dev_attr_in0_beep.dev_attr.attr, 1260 &sensor_dev_attr_in1_beep.dev_attr.attr, 1261 &sensor_dev_attr_in2_beep.dev_attr.attr, 1262 &sensor_dev_attr_in3_beep.dev_attr.attr, 1263 &sensor_dev_attr_in4_beep.dev_attr.attr, 1264 &sensor_dev_attr_in5_beep.dev_attr.attr, 1265 &sensor_dev_attr_in6_beep.dev_attr.attr, 1266 &sensor_dev_attr_in7_beep.dev_attr.attr, 1267 1268 &sensor_dev_attr_temp1_beep.dev_attr.attr, 1269 &sensor_dev_attr_temp2_beep.dev_attr.attr, 1270 &sensor_dev_attr_temp3_beep.dev_attr.attr, 1271 NULL 1272 }; 1273 1274 static const struct attribute_group it87_group_beep = { 1275 .attrs = it87_attributes_beep, 1276 }; 1277 1278 static struct attribute *it87_attributes_fan16[5][3+1] = { { 1279 &sensor_dev_attr_fan1_input16.dev_attr.attr, 1280 &sensor_dev_attr_fan1_min16.dev_attr.attr, 1281 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1282 NULL 1283 }, { 1284 &sensor_dev_attr_fan2_input16.dev_attr.attr, 1285 &sensor_dev_attr_fan2_min16.dev_attr.attr, 1286 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1287 NULL 1288 }, { 1289 &sensor_dev_attr_fan3_input16.dev_attr.attr, 1290 &sensor_dev_attr_fan3_min16.dev_attr.attr, 1291 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1292 NULL 1293 }, { 1294 &sensor_dev_attr_fan4_input16.dev_attr.attr, 1295 &sensor_dev_attr_fan4_min16.dev_attr.attr, 1296 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1297 NULL 1298 }, { 1299 &sensor_dev_attr_fan5_input16.dev_attr.attr, 1300 &sensor_dev_attr_fan5_min16.dev_attr.attr, 1301 &sensor_dev_attr_fan5_alarm.dev_attr.attr, 1302 NULL 1303 } }; 1304 1305 static const struct attribute_group it87_group_fan16[5] = { 1306 { .attrs = it87_attributes_fan16[0] }, 1307 { .attrs = it87_attributes_fan16[1] }, 1308 { .attrs = it87_attributes_fan16[2] }, 1309 { .attrs = it87_attributes_fan16[3] }, 1310 { .attrs = it87_attributes_fan16[4] }, 1311 }; 1312 1313 static struct attribute *it87_attributes_fan[3][4+1] = { { 1314 &sensor_dev_attr_fan1_input.dev_attr.attr, 1315 &sensor_dev_attr_fan1_min.dev_attr.attr, 1316 &sensor_dev_attr_fan1_div.dev_attr.attr, 1317 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1318 NULL 1319 }, { 1320 &sensor_dev_attr_fan2_input.dev_attr.attr, 1321 &sensor_dev_attr_fan2_min.dev_attr.attr, 1322 &sensor_dev_attr_fan2_div.dev_attr.attr, 1323 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1324 NULL 1325 }, { 1326 &sensor_dev_attr_fan3_input.dev_attr.attr, 1327 &sensor_dev_attr_fan3_min.dev_attr.attr, 1328 &sensor_dev_attr_fan3_div.dev_attr.attr, 1329 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1330 NULL 1331 } }; 1332 1333 static const struct attribute_group it87_group_fan[3] = { 1334 { .attrs = it87_attributes_fan[0] }, 1335 { .attrs = it87_attributes_fan[1] }, 1336 { .attrs = it87_attributes_fan[2] }, 1337 }; 1338 1339 static const struct attribute_group * 1340 it87_get_fan_group(const struct it87_data *data) 1341 { 1342 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan; 1343 } 1344 1345 static struct attribute *it87_attributes_pwm[3][4+1] = { { 1346 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1347 &sensor_dev_attr_pwm1.dev_attr.attr, 1348 &dev_attr_pwm1_freq.attr, 1349 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, 1350 NULL 1351 }, { 1352 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1353 &sensor_dev_attr_pwm2.dev_attr.attr, 1354 &dev_attr_pwm2_freq.attr, 1355 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr, 1356 NULL 1357 }, { 1358 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1359 &sensor_dev_attr_pwm3.dev_attr.attr, 1360 &dev_attr_pwm3_freq.attr, 1361 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, 1362 NULL 1363 } }; 1364 1365 static const struct attribute_group it87_group_pwm[3] = { 1366 { .attrs = it87_attributes_pwm[0] }, 1367 { .attrs = it87_attributes_pwm[1] }, 1368 { .attrs = it87_attributes_pwm[2] }, 1369 }; 1370 1371 static struct attribute *it87_attributes_autopwm[3][9+1] = { { 1372 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1373 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1374 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 1375 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 1376 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 1377 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 1378 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 1379 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 1380 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 1381 NULL 1382 }, { 1383 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, 1384 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, 1385 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr, 1386 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr, 1387 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr, 1388 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr, 1389 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr, 1390 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr, 1391 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr, 1392 NULL 1393 }, { 1394 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, 1395 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, 1396 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr, 1397 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr, 1398 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr, 1399 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr, 1400 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr, 1401 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr, 1402 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr, 1403 NULL 1404 } }; 1405 1406 static const struct attribute_group it87_group_autopwm[3] = { 1407 { .attrs = it87_attributes_autopwm[0] }, 1408 { .attrs = it87_attributes_autopwm[1] }, 1409 { .attrs = it87_attributes_autopwm[2] }, 1410 }; 1411 1412 static struct attribute *it87_attributes_fan_beep[] = { 1413 &sensor_dev_attr_fan1_beep.dev_attr.attr, 1414 &sensor_dev_attr_fan2_beep.dev_attr.attr, 1415 &sensor_dev_attr_fan3_beep.dev_attr.attr, 1416 &sensor_dev_attr_fan4_beep.dev_attr.attr, 1417 &sensor_dev_attr_fan5_beep.dev_attr.attr, 1418 }; 1419 1420 static struct attribute *it87_attributes_vid[] = { 1421 &dev_attr_vrm.attr, 1422 &dev_attr_cpu0_vid.attr, 1423 NULL 1424 }; 1425 1426 static const struct attribute_group it87_group_vid = { 1427 .attrs = it87_attributes_vid, 1428 }; 1429 1430 /* SuperIO detection - will change isa_address if a chip is found */ 1431 static int __init it87_find(unsigned short *address, 1432 struct it87_sio_data *sio_data) 1433 { 1434 int err = -ENODEV; 1435 u16 chip_type; 1436 const char *board_vendor, *board_name; 1437 1438 superio_enter(); 1439 chip_type = force_id ? force_id : superio_inw(DEVID); 1440 1441 switch (chip_type) { 1442 case IT8705F_DEVID: 1443 sio_data->type = it87; 1444 break; 1445 case IT8712F_DEVID: 1446 sio_data->type = it8712; 1447 break; 1448 case IT8716F_DEVID: 1449 case IT8726F_DEVID: 1450 sio_data->type = it8716; 1451 break; 1452 case IT8718F_DEVID: 1453 sio_data->type = it8718; 1454 break; 1455 case IT8720F_DEVID: 1456 sio_data->type = it8720; 1457 break; 1458 case 0xffff: /* No device at all */ 1459 goto exit; 1460 default: 1461 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n", 1462 chip_type); 1463 goto exit; 1464 } 1465 1466 superio_select(PME); 1467 if (!(superio_inb(IT87_ACT_REG) & 0x01)) { 1468 pr_info("it87: Device not activated, skipping\n"); 1469 goto exit; 1470 } 1471 1472 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); 1473 if (*address == 0) { 1474 pr_info("it87: Base address not set, skipping\n"); 1475 goto exit; 1476 } 1477 1478 err = 0; 1479 sio_data->revision = superio_inb(DEVREV) & 0x0f; 1480 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n", 1481 chip_type, *address, sio_data->revision); 1482 1483 /* Read GPIO config and VID value from LDN 7 (GPIO) */ 1484 if (sio_data->type == it87) { 1485 /* The IT8705F doesn't have VID pins at all */ 1486 sio_data->skip_vid = 1; 1487 1488 /* The IT8705F has a different LD number for GPIO */ 1489 superio_select(5); 1490 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1491 } else { 1492 int reg; 1493 1494 superio_select(GPIO); 1495 /* We need at least 4 VID pins */ 1496 reg = superio_inb(IT87_SIO_GPIO3_REG); 1497 if (reg & 0x0f) { 1498 pr_info("it87: VID is disabled (pins used for GPIO)\n"); 1499 sio_data->skip_vid = 1; 1500 } 1501 1502 /* Check if fan3 is there or not */ 1503 if (reg & (1 << 6)) 1504 sio_data->skip_pwm |= (1 << 2); 1505 if (reg & (1 << 7)) 1506 sio_data->skip_fan |= (1 << 2); 1507 1508 /* Check if fan2 is there or not */ 1509 reg = superio_inb(IT87_SIO_GPIO5_REG); 1510 if (reg & (1 << 1)) 1511 sio_data->skip_pwm |= (1 << 1); 1512 if (reg & (1 << 2)) 1513 sio_data->skip_fan |= (1 << 1); 1514 1515 if ((sio_data->type == it8718 || sio_data->type == it8720) 1516 && !(sio_data->skip_vid)) 1517 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG); 1518 1519 reg = superio_inb(IT87_SIO_PINX2_REG); 1520 if (reg & (1 << 0)) 1521 pr_info("it87: in3 is VCC (+5V)\n"); 1522 if (reg & (1 << 1)) 1523 pr_info("it87: in7 is VCCH (+5V Stand-By)\n"); 1524 1525 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1526 } 1527 if (sio_data->beep_pin) 1528 pr_info("it87: Beeping is supported\n"); 1529 1530 /* Disable specific features based on DMI strings */ 1531 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR); 1532 board_name = dmi_get_system_info(DMI_BOARD_NAME); 1533 if (board_vendor && board_name) { 1534 if (strcmp(board_vendor, "nVIDIA") == 0 1535 && strcmp(board_name, "FN68PT") == 0) { 1536 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not 1537 connected to a fan, but to something else. One user 1538 has reported instant system power-off when changing 1539 the PWM2 duty cycle, so we disable it. 1540 I use the board name string as the trigger in case 1541 the same board is ever used in other systems. */ 1542 pr_info("it87: Disabling pwm2 due to " 1543 "hardware constraints\n"); 1544 sio_data->skip_pwm = (1 << 1); 1545 } 1546 } 1547 1548 exit: 1549 superio_exit(); 1550 return err; 1551 } 1552 1553 static void it87_remove_files(struct device *dev) 1554 { 1555 struct it87_data *data = platform_get_drvdata(pdev); 1556 struct it87_sio_data *sio_data = dev->platform_data; 1557 const struct attribute_group *fan_group = it87_get_fan_group(data); 1558 int i; 1559 1560 sysfs_remove_group(&dev->kobj, &it87_group); 1561 if (sio_data->beep_pin) 1562 sysfs_remove_group(&dev->kobj, &it87_group_beep); 1563 for (i = 0; i < 5; i++) { 1564 if (!(data->has_fan & (1 << i))) 1565 continue; 1566 sysfs_remove_group(&dev->kobj, &fan_group[i]); 1567 if (sio_data->beep_pin) 1568 sysfs_remove_file(&dev->kobj, 1569 it87_attributes_fan_beep[i]); 1570 } 1571 for (i = 0; i < 3; i++) { 1572 if (sio_data->skip_pwm & (1 << 0)) 1573 continue; 1574 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]); 1575 if (has_old_autopwm(data)) 1576 sysfs_remove_group(&dev->kobj, 1577 &it87_group_autopwm[i]); 1578 } 1579 if (!sio_data->skip_vid) 1580 sysfs_remove_group(&dev->kobj, &it87_group_vid); 1581 } 1582 1583 static int __devinit it87_probe(struct platform_device *pdev) 1584 { 1585 struct it87_data *data; 1586 struct resource *res; 1587 struct device *dev = &pdev->dev; 1588 struct it87_sio_data *sio_data = dev->platform_data; 1589 const struct attribute_group *fan_group; 1590 int err = 0, i; 1591 int enable_pwm_interface; 1592 int fan_beep_need_rw; 1593 static const char *names[] = { 1594 "it87", 1595 "it8712", 1596 "it8716", 1597 "it8718", 1598 "it8720", 1599 }; 1600 1601 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1602 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) { 1603 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", 1604 (unsigned long)res->start, 1605 (unsigned long)(res->start + IT87_EC_EXTENT - 1)); 1606 err = -EBUSY; 1607 goto ERROR0; 1608 } 1609 1610 data = kzalloc(sizeof(struct it87_data), GFP_KERNEL); 1611 if (!data) { 1612 err = -ENOMEM; 1613 goto ERROR1; 1614 } 1615 1616 data->addr = res->start; 1617 data->type = sio_data->type; 1618 data->revision = sio_data->revision; 1619 data->name = names[sio_data->type]; 1620 1621 /* Now, we do the remaining detection. */ 1622 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80) 1623 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) { 1624 err = -ENODEV; 1625 goto ERROR2; 1626 } 1627 1628 platform_set_drvdata(pdev, data); 1629 1630 mutex_init(&data->update_lock); 1631 1632 /* Check PWM configuration */ 1633 enable_pwm_interface = it87_check_pwm(dev); 1634 1635 /* Initialize the IT87 chip */ 1636 it87_init_device(pdev); 1637 1638 /* Register sysfs hooks */ 1639 err = sysfs_create_group(&dev->kobj, &it87_group); 1640 if (err) 1641 goto ERROR2; 1642 1643 if (sio_data->beep_pin) { 1644 err = sysfs_create_group(&dev->kobj, &it87_group_beep); 1645 if (err) 1646 goto ERROR4; 1647 } 1648 1649 /* Do not create fan files for disabled fans */ 1650 fan_group = it87_get_fan_group(data); 1651 fan_beep_need_rw = 1; 1652 for (i = 0; i < 5; i++) { 1653 if (!(data->has_fan & (1 << i))) 1654 continue; 1655 err = sysfs_create_group(&dev->kobj, &fan_group[i]); 1656 if (err) 1657 goto ERROR4; 1658 1659 if (sio_data->beep_pin) { 1660 err = sysfs_create_file(&dev->kobj, 1661 it87_attributes_fan_beep[i]); 1662 if (err) 1663 goto ERROR4; 1664 if (!fan_beep_need_rw) 1665 continue; 1666 1667 /* As we have a single beep enable bit for all fans, 1668 * only the first enabled fan has a writable attribute 1669 * for it. */ 1670 if (sysfs_chmod_file(&dev->kobj, 1671 it87_attributes_fan_beep[i], 1672 S_IRUGO | S_IWUSR)) 1673 dev_dbg(dev, "chmod +w fan%d_beep failed\n", 1674 i + 1); 1675 fan_beep_need_rw = 0; 1676 } 1677 } 1678 1679 if (enable_pwm_interface) { 1680 for (i = 0; i < 3; i++) { 1681 if (sio_data->skip_pwm & (1 << i)) 1682 continue; 1683 err = sysfs_create_group(&dev->kobj, 1684 &it87_group_pwm[i]); 1685 if (err) 1686 goto ERROR4; 1687 1688 if (!has_old_autopwm(data)) 1689 continue; 1690 err = sysfs_create_group(&dev->kobj, 1691 &it87_group_autopwm[i]); 1692 if (err) 1693 goto ERROR4; 1694 } 1695 } 1696 1697 if (!sio_data->skip_vid) { 1698 data->vrm = vid_which_vrm(); 1699 /* VID reading from Super-I/O config space if available */ 1700 data->vid = sio_data->vid_value; 1701 err = sysfs_create_group(&dev->kobj, &it87_group_vid); 1702 if (err) 1703 goto ERROR4; 1704 } 1705 1706 data->hwmon_dev = hwmon_device_register(dev); 1707 if (IS_ERR(data->hwmon_dev)) { 1708 err = PTR_ERR(data->hwmon_dev); 1709 goto ERROR4; 1710 } 1711 1712 return 0; 1713 1714 ERROR4: 1715 it87_remove_files(dev); 1716 ERROR2: 1717 platform_set_drvdata(pdev, NULL); 1718 kfree(data); 1719 ERROR1: 1720 release_region(res->start, IT87_EC_EXTENT); 1721 ERROR0: 1722 return err; 1723 } 1724 1725 static int __devexit it87_remove(struct platform_device *pdev) 1726 { 1727 struct it87_data *data = platform_get_drvdata(pdev); 1728 1729 hwmon_device_unregister(data->hwmon_dev); 1730 it87_remove_files(&pdev->dev); 1731 1732 release_region(data->addr, IT87_EC_EXTENT); 1733 platform_set_drvdata(pdev, NULL); 1734 kfree(data); 1735 1736 return 0; 1737 } 1738 1739 /* Must be called with data->update_lock held, except during initialization. 1740 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1741 would slow down the IT87 access and should not be necessary. */ 1742 static int it87_read_value(struct it87_data *data, u8 reg) 1743 { 1744 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1745 return inb_p(data->addr + IT87_DATA_REG_OFFSET); 1746 } 1747 1748 /* Must be called with data->update_lock held, except during initialization. 1749 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1750 would slow down the IT87 access and should not be necessary. */ 1751 static void it87_write_value(struct it87_data *data, u8 reg, u8 value) 1752 { 1753 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1754 outb_p(value, data->addr + IT87_DATA_REG_OFFSET); 1755 } 1756 1757 /* Return 1 if and only if the PWM interface is safe to use */ 1758 static int __devinit it87_check_pwm(struct device *dev) 1759 { 1760 struct it87_data *data = dev_get_drvdata(dev); 1761 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off 1762 * and polarity set to active low is sign that this is the case so we 1763 * disable pwm control to protect the user. */ 1764 int tmp = it87_read_value(data, IT87_REG_FAN_CTL); 1765 if ((tmp & 0x87) == 0) { 1766 if (fix_pwm_polarity) { 1767 /* The user asks us to attempt a chip reconfiguration. 1768 * This means switching to active high polarity and 1769 * inverting all fan speed values. */ 1770 int i; 1771 u8 pwm[3]; 1772 1773 for (i = 0; i < 3; i++) 1774 pwm[i] = it87_read_value(data, 1775 IT87_REG_PWM(i)); 1776 1777 /* If any fan is in automatic pwm mode, the polarity 1778 * might be correct, as suspicious as it seems, so we 1779 * better don't change anything (but still disable the 1780 * PWM interface). */ 1781 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) { 1782 dev_info(dev, "Reconfiguring PWM to " 1783 "active high polarity\n"); 1784 it87_write_value(data, IT87_REG_FAN_CTL, 1785 tmp | 0x87); 1786 for (i = 0; i < 3; i++) 1787 it87_write_value(data, 1788 IT87_REG_PWM(i), 1789 0x7f & ~pwm[i]); 1790 return 1; 1791 } 1792 1793 dev_info(dev, "PWM configuration is " 1794 "too broken to be fixed\n"); 1795 } 1796 1797 dev_info(dev, "Detected broken BIOS " 1798 "defaults, disabling PWM interface\n"); 1799 return 0; 1800 } else if (fix_pwm_polarity) { 1801 dev_info(dev, "PWM configuration looks " 1802 "sane, won't touch\n"); 1803 } 1804 1805 return 1; 1806 } 1807 1808 /* Called when we have found a new IT87. */ 1809 static void __devinit it87_init_device(struct platform_device *pdev) 1810 { 1811 struct it87_sio_data *sio_data = pdev->dev.platform_data; 1812 struct it87_data *data = platform_get_drvdata(pdev); 1813 int tmp, i; 1814 u8 mask; 1815 1816 /* For each PWM channel: 1817 * - If it is in automatic mode, setting to manual mode should set 1818 * the fan to full speed by default. 1819 * - If it is in manual mode, we need a mapping to temperature 1820 * channels to use when later setting to automatic mode later. 1821 * Use a 1:1 mapping by default (we are clueless.) 1822 * In both cases, the value can (and should) be changed by the user 1823 * prior to switching to a different mode. */ 1824 for (i = 0; i < 3; i++) { 1825 data->pwm_temp_map[i] = i; 1826 data->pwm_duty[i] = 0x7f; /* Full speed */ 1827 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */ 1828 } 1829 1830 /* Some chips seem to have default value 0xff for all limit 1831 * registers. For low voltage limits it makes no sense and triggers 1832 * alarms, so change to 0 instead. For high temperature limits, it 1833 * means -1 degree C, which surprisingly doesn't trigger an alarm, 1834 * but is still confusing, so change to 127 degrees C. */ 1835 for (i = 0; i < 8; i++) { 1836 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i)); 1837 if (tmp == 0xff) 1838 it87_write_value(data, IT87_REG_VIN_MIN(i), 0); 1839 } 1840 for (i = 0; i < 3; i++) { 1841 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1842 if (tmp == 0xff) 1843 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127); 1844 } 1845 1846 /* Temperature channels are not forcibly enabled, as they can be 1847 * set to two different sensor types and we can't guess which one 1848 * is correct for a given system. These channels can be enabled at 1849 * run-time through the temp{1-3}_type sysfs accessors if needed. */ 1850 1851 /* Check if voltage monitors are reset manually or by some reason */ 1852 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE); 1853 if ((tmp & 0xff) == 0) { 1854 /* Enable all voltage monitors */ 1855 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff); 1856 } 1857 1858 /* Check if tachometers are reset manually or by some reason */ 1859 mask = 0x70 & ~(sio_data->skip_fan << 4); 1860 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL); 1861 if ((data->fan_main_ctrl & mask) == 0) { 1862 /* Enable all fan tachometers */ 1863 data->fan_main_ctrl |= mask; 1864 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 1865 data->fan_main_ctrl); 1866 } 1867 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07; 1868 1869 /* Set tachometers to 16-bit mode if needed */ 1870 if (has_16bit_fans(data)) { 1871 tmp = it87_read_value(data, IT87_REG_FAN_16BIT); 1872 if (~tmp & 0x07 & data->has_fan) { 1873 dev_dbg(&pdev->dev, 1874 "Setting fan1-3 to 16-bit mode\n"); 1875 it87_write_value(data, IT87_REG_FAN_16BIT, 1876 tmp | 0x07); 1877 } 1878 /* IT8705F only supports three fans. */ 1879 if (data->type != it87) { 1880 if (tmp & (1 << 4)) 1881 data->has_fan |= (1 << 3); /* fan4 enabled */ 1882 if (tmp & (1 << 5)) 1883 data->has_fan |= (1 << 4); /* fan5 enabled */ 1884 } 1885 } 1886 1887 /* Fan input pins may be used for alternative functions */ 1888 data->has_fan &= ~sio_data->skip_fan; 1889 1890 /* Start monitoring */ 1891 it87_write_value(data, IT87_REG_CONFIG, 1892 (it87_read_value(data, IT87_REG_CONFIG) & 0x36) 1893 | (update_vbat ? 0x41 : 0x01)); 1894 } 1895 1896 static void it87_update_pwm_ctrl(struct it87_data *data, int nr) 1897 { 1898 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr)); 1899 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */ 1900 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03; 1901 else /* Manual mode */ 1902 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f; 1903 1904 if (has_old_autopwm(data)) { 1905 int i; 1906 1907 for (i = 0; i < 5 ; i++) 1908 data->auto_temp[nr][i] = it87_read_value(data, 1909 IT87_REG_AUTO_TEMP(nr, i)); 1910 for (i = 0; i < 3 ; i++) 1911 data->auto_pwm[nr][i] = it87_read_value(data, 1912 IT87_REG_AUTO_PWM(nr, i)); 1913 } 1914 } 1915 1916 static struct it87_data *it87_update_device(struct device *dev) 1917 { 1918 struct it87_data *data = dev_get_drvdata(dev); 1919 int i; 1920 1921 mutex_lock(&data->update_lock); 1922 1923 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 1924 || !data->valid) { 1925 if (update_vbat) { 1926 /* Cleared after each update, so reenable. Value 1927 returned by this read will be previous value */ 1928 it87_write_value(data, IT87_REG_CONFIG, 1929 it87_read_value(data, IT87_REG_CONFIG) | 0x40); 1930 } 1931 for (i = 0; i <= 7; i++) { 1932 data->in[i] = 1933 it87_read_value(data, IT87_REG_VIN(i)); 1934 data->in_min[i] = 1935 it87_read_value(data, IT87_REG_VIN_MIN(i)); 1936 data->in_max[i] = 1937 it87_read_value(data, IT87_REG_VIN_MAX(i)); 1938 } 1939 /* in8 (battery) has no limit registers */ 1940 data->in[8] = it87_read_value(data, IT87_REG_VIN(8)); 1941 1942 for (i = 0; i < 5; i++) { 1943 /* Skip disabled fans */ 1944 if (!(data->has_fan & (1 << i))) 1945 continue; 1946 1947 data->fan_min[i] = 1948 it87_read_value(data, IT87_REG_FAN_MIN[i]); 1949 data->fan[i] = it87_read_value(data, 1950 IT87_REG_FAN[i]); 1951 /* Add high byte if in 16-bit mode */ 1952 if (has_16bit_fans(data)) { 1953 data->fan[i] |= it87_read_value(data, 1954 IT87_REG_FANX[i]) << 8; 1955 data->fan_min[i] |= it87_read_value(data, 1956 IT87_REG_FANX_MIN[i]) << 8; 1957 } 1958 } 1959 for (i = 0; i < 3; i++) { 1960 data->temp[i] = 1961 it87_read_value(data, IT87_REG_TEMP(i)); 1962 data->temp_high[i] = 1963 it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1964 data->temp_low[i] = 1965 it87_read_value(data, IT87_REG_TEMP_LOW(i)); 1966 } 1967 1968 /* Newer chips don't have clock dividers */ 1969 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) { 1970 i = it87_read_value(data, IT87_REG_FAN_DIV); 1971 data->fan_div[0] = i & 0x07; 1972 data->fan_div[1] = (i >> 3) & 0x07; 1973 data->fan_div[2] = (i & 0x40) ? 3 : 1; 1974 } 1975 1976 data->alarms = 1977 it87_read_value(data, IT87_REG_ALARM1) | 1978 (it87_read_value(data, IT87_REG_ALARM2) << 8) | 1979 (it87_read_value(data, IT87_REG_ALARM3) << 16); 1980 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE); 1981 1982 data->fan_main_ctrl = it87_read_value(data, 1983 IT87_REG_FAN_MAIN_CTRL); 1984 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL); 1985 for (i = 0; i < 3; i++) 1986 it87_update_pwm_ctrl(data, i); 1987 1988 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE); 1989 /* The 8705 does not have VID capability. 1990 The 8718 and the 8720 don't use IT87_REG_VID for the 1991 same purpose. */ 1992 if (data->type == it8712 || data->type == it8716) { 1993 data->vid = it87_read_value(data, IT87_REG_VID); 1994 /* The older IT8712F revisions had only 5 VID pins, 1995 but we assume it is always safe to read 6 bits. */ 1996 data->vid &= 0x3f; 1997 } 1998 data->last_updated = jiffies; 1999 data->valid = 1; 2000 } 2001 2002 mutex_unlock(&data->update_lock); 2003 2004 return data; 2005 } 2006 2007 static int __init it87_device_add(unsigned short address, 2008 const struct it87_sio_data *sio_data) 2009 { 2010 struct resource res = { 2011 .start = address + IT87_EC_OFFSET, 2012 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1, 2013 .name = DRVNAME, 2014 .flags = IORESOURCE_IO, 2015 }; 2016 int err; 2017 2018 err = acpi_check_resource_conflict(&res); 2019 if (err) 2020 goto exit; 2021 2022 pdev = platform_device_alloc(DRVNAME, address); 2023 if (!pdev) { 2024 err = -ENOMEM; 2025 printk(KERN_ERR DRVNAME ": Device allocation failed\n"); 2026 goto exit; 2027 } 2028 2029 err = platform_device_add_resources(pdev, &res, 1); 2030 if (err) { 2031 printk(KERN_ERR DRVNAME ": Device resource addition failed " 2032 "(%d)\n", err); 2033 goto exit_device_put; 2034 } 2035 2036 err = platform_device_add_data(pdev, sio_data, 2037 sizeof(struct it87_sio_data)); 2038 if (err) { 2039 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n"); 2040 goto exit_device_put; 2041 } 2042 2043 err = platform_device_add(pdev); 2044 if (err) { 2045 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", 2046 err); 2047 goto exit_device_put; 2048 } 2049 2050 return 0; 2051 2052 exit_device_put: 2053 platform_device_put(pdev); 2054 exit: 2055 return err; 2056 } 2057 2058 static int __init sm_it87_init(void) 2059 { 2060 int err; 2061 unsigned short isa_address = 0; 2062 struct it87_sio_data sio_data; 2063 2064 memset(&sio_data, 0, sizeof(struct it87_sio_data)); 2065 err = it87_find(&isa_address, &sio_data); 2066 if (err) 2067 return err; 2068 err = platform_driver_register(&it87_driver); 2069 if (err) 2070 return err; 2071 2072 err = it87_device_add(isa_address, &sio_data); 2073 if (err) { 2074 platform_driver_unregister(&it87_driver); 2075 return err; 2076 } 2077 2078 return 0; 2079 } 2080 2081 static void __exit sm_it87_exit(void) 2082 { 2083 platform_device_unregister(pdev); 2084 platform_driver_unregister(&it87_driver); 2085 } 2086 2087 2088 MODULE_AUTHOR("Chris Gauthron, " 2089 "Jean Delvare <khali@linux-fr.org>"); 2090 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8720F/8726F, SiS950 driver"); 2091 module_param(update_vbat, bool, 0); 2092 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); 2093 module_param(fix_pwm_polarity, bool, 0); 2094 MODULE_PARM_DESC(fix_pwm_polarity, 2095 "Force PWM polarity to active high (DANGEROUS)"); 2096 MODULE_LICENSE("GPL"); 2097 2098 module_init(sm_it87_init); 2099 module_exit(sm_it87_exit); 2100