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 inline void 84 superio_outb(int reg, int val) 85 { 86 outb(reg, REG); 87 outb(val, VAL); 88 } 89 90 static int superio_inw(int reg) 91 { 92 int val; 93 outb(reg++, REG); 94 val = inb(VAL) << 8; 95 outb(reg, REG); 96 val |= inb(VAL); 97 return val; 98 } 99 100 static inline void 101 superio_select(int ldn) 102 { 103 outb(DEV, REG); 104 outb(ldn, VAL); 105 } 106 107 static inline void 108 superio_enter(void) 109 { 110 outb(0x87, REG); 111 outb(0x01, REG); 112 outb(0x55, REG); 113 outb(0x55, REG); 114 } 115 116 static inline void 117 superio_exit(void) 118 { 119 outb(0x02, REG); 120 outb(0x02, VAL); 121 } 122 123 /* Logical device 4 registers */ 124 #define IT8712F_DEVID 0x8712 125 #define IT8705F_DEVID 0x8705 126 #define IT8716F_DEVID 0x8716 127 #define IT8718F_DEVID 0x8718 128 #define IT8720F_DEVID 0x8720 129 #define IT8726F_DEVID 0x8726 130 #define IT87_ACT_REG 0x30 131 #define IT87_BASE_REG 0x60 132 133 /* Logical device 7 registers (IT8712F and later) */ 134 #define IT87_SIO_GPIO3_REG 0x27 135 #define IT87_SIO_GPIO5_REG 0x29 136 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */ 137 #define IT87_SIO_VID_REG 0xfc /* VID value */ 138 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */ 139 140 /* Update battery voltage after every reading if true */ 141 static int update_vbat; 142 143 /* Not all BIOSes properly configure the PWM registers */ 144 static int fix_pwm_polarity; 145 146 /* Many IT87 constants specified below */ 147 148 /* Length of ISA address segment */ 149 #define IT87_EXTENT 8 150 151 /* Length of ISA address segment for Environmental Controller */ 152 #define IT87_EC_EXTENT 2 153 154 /* Offset of EC registers from ISA base address */ 155 #define IT87_EC_OFFSET 5 156 157 /* Where are the ISA address/data registers relative to the EC base address */ 158 #define IT87_ADDR_REG_OFFSET 0 159 #define IT87_DATA_REG_OFFSET 1 160 161 /*----- The IT87 registers -----*/ 162 163 #define IT87_REG_CONFIG 0x00 164 165 #define IT87_REG_ALARM1 0x01 166 #define IT87_REG_ALARM2 0x02 167 #define IT87_REG_ALARM3 0x03 168 169 /* The IT8718F and IT8720F have the VID value in a different register, in 170 Super-I/O configuration space. */ 171 #define IT87_REG_VID 0x0a 172 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b 173 for fan divisors. Later IT8712F revisions must use 16-bit tachometer 174 mode. */ 175 #define IT87_REG_FAN_DIV 0x0b 176 #define IT87_REG_FAN_16BIT 0x0c 177 178 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */ 179 180 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 }; 181 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 }; 182 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 }; 183 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 }; 184 #define IT87_REG_FAN_MAIN_CTRL 0x13 185 #define IT87_REG_FAN_CTL 0x14 186 #define IT87_REG_PWM(nr) (0x15 + (nr)) 187 188 #define IT87_REG_VIN(nr) (0x20 + (nr)) 189 #define IT87_REG_TEMP(nr) (0x29 + (nr)) 190 191 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2) 192 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2) 193 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2) 194 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2) 195 196 #define IT87_REG_VIN_ENABLE 0x50 197 #define IT87_REG_TEMP_ENABLE 0x51 198 #define IT87_REG_BEEP_ENABLE 0x5c 199 200 #define IT87_REG_CHIPID 0x58 201 202 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i)) 203 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i)) 204 205 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255)) 206 #define IN_FROM_REG(val) ((val) * 16) 207 208 static inline u8 FAN_TO_REG(long rpm, int div) 209 { 210 if (rpm == 0) 211 return 255; 212 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 213 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 214 254); 215 } 216 217 static inline u16 FAN16_TO_REG(long rpm) 218 { 219 if (rpm == 0) 220 return 0xffff; 221 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe); 222 } 223 224 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div))) 225 /* The divider is fixed to 2 in 16-bit mode */ 226 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2)) 227 228 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\ 229 ((val)+500)/1000),-128,127)) 230 #define TEMP_FROM_REG(val) ((val) * 1000) 231 232 #define PWM_TO_REG(val) ((val) >> 1) 233 #define PWM_FROM_REG(val) (((val)&0x7f) << 1) 234 235 static int DIV_TO_REG(int val) 236 { 237 int answer = 0; 238 while (answer < 7 && (val >>= 1)) 239 answer++; 240 return answer; 241 } 242 #define DIV_FROM_REG(val) (1 << (val)) 243 244 static const unsigned int pwm_freq[8] = { 245 48000000 / 128, 246 24000000 / 128, 247 12000000 / 128, 248 8000000 / 128, 249 6000000 / 128, 250 3000000 / 128, 251 1500000 / 128, 252 750000 / 128, 253 }; 254 255 256 struct it87_sio_data { 257 enum chips type; 258 /* Values read from Super-I/O config space */ 259 u8 revision; 260 u8 vid_value; 261 u8 beep_pin; 262 u8 internal; /* Internal sensors can be labeled */ 263 /* Features skipped based on config or DMI */ 264 u8 skip_vid; 265 u8 skip_fan; 266 u8 skip_pwm; 267 }; 268 269 /* For each registered chip, we need to keep some data in memory. 270 The structure is dynamically allocated. */ 271 struct it87_data { 272 struct device *hwmon_dev; 273 enum chips type; 274 u8 revision; 275 276 unsigned short addr; 277 const char *name; 278 struct mutex update_lock; 279 char valid; /* !=0 if following fields are valid */ 280 unsigned long last_updated; /* In jiffies */ 281 282 u8 in[9]; /* Register value */ 283 u8 in_max[8]; /* Register value */ 284 u8 in_min[8]; /* Register value */ 285 u8 has_fan; /* Bitfield, fans enabled */ 286 u16 fan[5]; /* Register values, possibly combined */ 287 u16 fan_min[5]; /* Register values, possibly combined */ 288 s8 temp[3]; /* Register value */ 289 s8 temp_high[3]; /* Register value */ 290 s8 temp_low[3]; /* Register value */ 291 u8 sensor; /* Register value */ 292 u8 fan_div[3]; /* Register encoding, shifted right */ 293 u8 vid; /* Register encoding, combined */ 294 u8 vrm; 295 u32 alarms; /* Register encoding, combined */ 296 u8 beeps; /* Register encoding */ 297 u8 fan_main_ctrl; /* Register value */ 298 u8 fan_ctl; /* Register value */ 299 300 /* The following 3 arrays correspond to the same registers. The 301 * meaning of bits 6-0 depends on the value of bit 7, and we want 302 * to preserve settings on mode changes, so we have to track all 303 * values separately. */ 304 u8 pwm_ctrl[3]; /* Register value */ 305 u8 pwm_duty[3]; /* Manual PWM value set by user (bit 6-0) */ 306 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */ 307 308 /* Automatic fan speed control registers */ 309 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */ 310 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */ 311 }; 312 313 static inline int has_16bit_fans(const struct it87_data *data) 314 { 315 /* IT8705F Datasheet 0.4.1, 3h == Version G. 316 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J. 317 These are the first revisions with 16bit tachometer support. */ 318 return (data->type == it87 && data->revision >= 0x03) 319 || (data->type == it8712 && data->revision >= 0x08) 320 || data->type == it8716 321 || data->type == it8718 322 || data->type == it8720; 323 } 324 325 static inline int has_old_autopwm(const struct it87_data *data) 326 { 327 /* The old automatic fan speed control interface is implemented 328 by IT8705F chips up to revision F and IT8712F chips up to 329 revision G. */ 330 return (data->type == it87 && data->revision < 0x03) 331 || (data->type == it8712 && data->revision < 0x08); 332 } 333 334 static int it87_probe(struct platform_device *pdev); 335 static int __devexit it87_remove(struct platform_device *pdev); 336 337 static int it87_read_value(struct it87_data *data, u8 reg); 338 static void it87_write_value(struct it87_data *data, u8 reg, u8 value); 339 static struct it87_data *it87_update_device(struct device *dev); 340 static int it87_check_pwm(struct device *dev); 341 static void it87_init_device(struct platform_device *pdev); 342 343 344 static struct platform_driver it87_driver = { 345 .driver = { 346 .owner = THIS_MODULE, 347 .name = DRVNAME, 348 }, 349 .probe = it87_probe, 350 .remove = __devexit_p(it87_remove), 351 }; 352 353 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 354 char *buf) 355 { 356 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 357 int nr = sensor_attr->index; 358 359 struct it87_data *data = it87_update_device(dev); 360 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); 361 } 362 363 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 364 char *buf) 365 { 366 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 367 int nr = sensor_attr->index; 368 369 struct it87_data *data = it87_update_device(dev); 370 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); 371 } 372 373 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 374 char *buf) 375 { 376 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 377 int nr = sensor_attr->index; 378 379 struct it87_data *data = it87_update_device(dev); 380 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); 381 } 382 383 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 384 const char *buf, size_t count) 385 { 386 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 387 int nr = sensor_attr->index; 388 389 struct it87_data *data = dev_get_drvdata(dev); 390 unsigned long val; 391 392 if (strict_strtoul(buf, 10, &val) < 0) 393 return -EINVAL; 394 395 mutex_lock(&data->update_lock); 396 data->in_min[nr] = IN_TO_REG(val); 397 it87_write_value(data, IT87_REG_VIN_MIN(nr), 398 data->in_min[nr]); 399 mutex_unlock(&data->update_lock); 400 return count; 401 } 402 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 403 const char *buf, size_t count) 404 { 405 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 406 int nr = sensor_attr->index; 407 408 struct it87_data *data = dev_get_drvdata(dev); 409 unsigned long val; 410 411 if (strict_strtoul(buf, 10, &val) < 0) 412 return -EINVAL; 413 414 mutex_lock(&data->update_lock); 415 data->in_max[nr] = IN_TO_REG(val); 416 it87_write_value(data, IT87_REG_VIN_MAX(nr), 417 data->in_max[nr]); 418 mutex_unlock(&data->update_lock); 419 return count; 420 } 421 422 #define show_in_offset(offset) \ 423 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 424 show_in, NULL, offset); 425 426 #define limit_in_offset(offset) \ 427 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 428 show_in_min, set_in_min, offset); \ 429 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 430 show_in_max, set_in_max, offset); 431 432 show_in_offset(0); 433 limit_in_offset(0); 434 show_in_offset(1); 435 limit_in_offset(1); 436 show_in_offset(2); 437 limit_in_offset(2); 438 show_in_offset(3); 439 limit_in_offset(3); 440 show_in_offset(4); 441 limit_in_offset(4); 442 show_in_offset(5); 443 limit_in_offset(5); 444 show_in_offset(6); 445 limit_in_offset(6); 446 show_in_offset(7); 447 limit_in_offset(7); 448 show_in_offset(8); 449 450 /* 3 temperatures */ 451 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 452 char *buf) 453 { 454 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 455 int nr = sensor_attr->index; 456 457 struct it87_data *data = it87_update_device(dev); 458 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 459 } 460 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 461 char *buf) 462 { 463 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 464 int nr = sensor_attr->index; 465 466 struct it87_data *data = it87_update_device(dev); 467 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); 468 } 469 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 470 char *buf) 471 { 472 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 473 int nr = sensor_attr->index; 474 475 struct it87_data *data = it87_update_device(dev); 476 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); 477 } 478 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 479 const char *buf, size_t count) 480 { 481 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 482 int nr = sensor_attr->index; 483 484 struct it87_data *data = dev_get_drvdata(dev); 485 long val; 486 487 if (strict_strtol(buf, 10, &val) < 0) 488 return -EINVAL; 489 490 mutex_lock(&data->update_lock); 491 data->temp_high[nr] = TEMP_TO_REG(val); 492 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); 493 mutex_unlock(&data->update_lock); 494 return count; 495 } 496 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 497 const char *buf, size_t count) 498 { 499 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 500 int nr = sensor_attr->index; 501 502 struct it87_data *data = dev_get_drvdata(dev); 503 long val; 504 505 if (strict_strtol(buf, 10, &val) < 0) 506 return -EINVAL; 507 508 mutex_lock(&data->update_lock); 509 data->temp_low[nr] = TEMP_TO_REG(val); 510 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); 511 mutex_unlock(&data->update_lock); 512 return count; 513 } 514 #define show_temp_offset(offset) \ 515 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 516 show_temp, NULL, offset - 1); \ 517 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 518 show_temp_max, set_temp_max, offset - 1); \ 519 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 520 show_temp_min, set_temp_min, offset - 1); 521 522 show_temp_offset(1); 523 show_temp_offset(2); 524 show_temp_offset(3); 525 526 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, 527 char *buf) 528 { 529 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 530 int nr = sensor_attr->index; 531 532 struct it87_data *data = it87_update_device(dev); 533 u8 reg = data->sensor; /* In case the value is updated while 534 we use it */ 535 536 if (reg & (1 << nr)) 537 return sprintf(buf, "3\n"); /* thermal diode */ 538 if (reg & (8 << nr)) 539 return sprintf(buf, "4\n"); /* thermistor */ 540 return sprintf(buf, "0\n"); /* disabled */ 541 } 542 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, 543 const char *buf, size_t count) 544 { 545 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 546 int nr = sensor_attr->index; 547 548 struct it87_data *data = dev_get_drvdata(dev); 549 long val; 550 u8 reg; 551 552 if (strict_strtol(buf, 10, &val) < 0) 553 return -EINVAL; 554 555 reg = it87_read_value(data, IT87_REG_TEMP_ENABLE); 556 reg &= ~(1 << nr); 557 reg &= ~(8 << nr); 558 if (val == 2) { /* backwards compatibility */ 559 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 " 560 "instead\n"); 561 val = 4; 562 } 563 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */ 564 if (val == 3) 565 reg |= 1 << nr; 566 else if (val == 4) 567 reg |= 8 << nr; 568 else if (val != 0) 569 return -EINVAL; 570 571 mutex_lock(&data->update_lock); 572 data->sensor = reg; 573 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor); 574 data->valid = 0; /* Force cache refresh */ 575 mutex_unlock(&data->update_lock); 576 return count; 577 } 578 #define show_sensor_offset(offset) \ 579 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ 580 show_sensor, set_sensor, offset - 1); 581 582 show_sensor_offset(1); 583 show_sensor_offset(2); 584 show_sensor_offset(3); 585 586 /* 3 Fans */ 587 588 static int pwm_mode(const struct it87_data *data, int nr) 589 { 590 int ctrl = data->fan_main_ctrl & (1 << nr); 591 592 if (ctrl == 0) /* Full speed */ 593 return 0; 594 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */ 595 return 2; 596 else /* Manual mode */ 597 return 1; 598 } 599 600 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 601 char *buf) 602 { 603 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 604 int nr = sensor_attr->index; 605 606 struct it87_data *data = it87_update_device(dev); 607 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 608 DIV_FROM_REG(data->fan_div[nr]))); 609 } 610 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 611 char *buf) 612 { 613 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 614 int nr = sensor_attr->index; 615 616 struct it87_data *data = it87_update_device(dev); 617 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 618 DIV_FROM_REG(data->fan_div[nr]))); 619 } 620 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 621 char *buf) 622 { 623 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 624 int nr = sensor_attr->index; 625 626 struct it87_data *data = it87_update_device(dev); 627 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 628 } 629 static ssize_t show_pwm_enable(struct device *dev, 630 struct device_attribute *attr, char *buf) 631 { 632 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 633 int nr = sensor_attr->index; 634 635 struct it87_data *data = it87_update_device(dev); 636 return sprintf(buf, "%d\n", pwm_mode(data, nr)); 637 } 638 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 639 char *buf) 640 { 641 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 642 int nr = sensor_attr->index; 643 644 struct it87_data *data = it87_update_device(dev); 645 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm_duty[nr])); 646 } 647 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr, 648 char *buf) 649 { 650 struct it87_data *data = it87_update_device(dev); 651 int index = (data->fan_ctl >> 4) & 0x07; 652 653 return sprintf(buf, "%u\n", pwm_freq[index]); 654 } 655 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 656 const char *buf, size_t count) 657 { 658 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 659 int nr = sensor_attr->index; 660 661 struct it87_data *data = dev_get_drvdata(dev); 662 long val; 663 u8 reg; 664 665 if (strict_strtol(buf, 10, &val) < 0) 666 return -EINVAL; 667 668 mutex_lock(&data->update_lock); 669 reg = it87_read_value(data, IT87_REG_FAN_DIV); 670 switch (nr) { 671 case 0: 672 data->fan_div[nr] = reg & 0x07; 673 break; 674 case 1: 675 data->fan_div[nr] = (reg >> 3) & 0x07; 676 break; 677 case 2: 678 data->fan_div[nr] = (reg & 0x40) ? 3 : 1; 679 break; 680 } 681 682 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 683 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 684 mutex_unlock(&data->update_lock); 685 return count; 686 } 687 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 688 const char *buf, size_t count) 689 { 690 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 691 int nr = sensor_attr->index; 692 693 struct it87_data *data = dev_get_drvdata(dev); 694 unsigned long val; 695 int min; 696 u8 old; 697 698 if (strict_strtoul(buf, 10, &val) < 0) 699 return -EINVAL; 700 701 mutex_lock(&data->update_lock); 702 old = it87_read_value(data, IT87_REG_FAN_DIV); 703 704 /* Save fan min limit */ 705 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 706 707 switch (nr) { 708 case 0: 709 case 1: 710 data->fan_div[nr] = DIV_TO_REG(val); 711 break; 712 case 2: 713 if (val < 8) 714 data->fan_div[nr] = 1; 715 else 716 data->fan_div[nr] = 3; 717 } 718 val = old & 0x80; 719 val |= (data->fan_div[0] & 0x07); 720 val |= (data->fan_div[1] & 0x07) << 3; 721 if (data->fan_div[2] == 3) 722 val |= 0x1 << 6; 723 it87_write_value(data, IT87_REG_FAN_DIV, val); 724 725 /* Restore fan min limit */ 726 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 727 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 728 729 mutex_unlock(&data->update_lock); 730 return count; 731 } 732 733 /* Returns 0 if OK, -EINVAL otherwise */ 734 static int check_trip_points(struct device *dev, int nr) 735 { 736 const struct it87_data *data = dev_get_drvdata(dev); 737 int i, err = 0; 738 739 if (has_old_autopwm(data)) { 740 for (i = 0; i < 3; i++) { 741 if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1]) 742 err = -EINVAL; 743 } 744 for (i = 0; i < 2; i++) { 745 if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1]) 746 err = -EINVAL; 747 } 748 } 749 750 if (err) { 751 dev_err(dev, "Inconsistent trip points, not switching to " 752 "automatic mode\n"); 753 dev_err(dev, "Adjust the trip points and try again\n"); 754 } 755 return err; 756 } 757 758 static ssize_t set_pwm_enable(struct device *dev, 759 struct device_attribute *attr, const char *buf, size_t count) 760 { 761 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 762 int nr = sensor_attr->index; 763 764 struct it87_data *data = dev_get_drvdata(dev); 765 long val; 766 767 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2) 768 return -EINVAL; 769 770 /* Check trip points before switching to automatic mode */ 771 if (val == 2) { 772 if (check_trip_points(dev, nr) < 0) 773 return -EINVAL; 774 } 775 776 mutex_lock(&data->update_lock); 777 778 if (val == 0) { 779 int tmp; 780 /* make sure the fan is on when in on/off mode */ 781 tmp = it87_read_value(data, IT87_REG_FAN_CTL); 782 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr)); 783 /* set on/off mode */ 784 data->fan_main_ctrl &= ~(1 << nr); 785 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 786 data->fan_main_ctrl); 787 } else { 788 if (val == 1) /* Manual mode */ 789 data->pwm_ctrl[nr] = data->pwm_duty[nr]; 790 else /* Automatic mode */ 791 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 792 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 793 /* set SmartGuardian mode */ 794 data->fan_main_ctrl |= (1 << nr); 795 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 796 data->fan_main_ctrl); 797 } 798 799 mutex_unlock(&data->update_lock); 800 return count; 801 } 802 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 803 const char *buf, size_t count) 804 { 805 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 806 int nr = sensor_attr->index; 807 808 struct it87_data *data = dev_get_drvdata(dev); 809 long val; 810 811 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255) 812 return -EINVAL; 813 814 mutex_lock(&data->update_lock); 815 data->pwm_duty[nr] = PWM_TO_REG(val); 816 /* If we are in manual mode, write the duty cycle immediately; 817 * otherwise, just store it for later use. */ 818 if (!(data->pwm_ctrl[nr] & 0x80)) { 819 data->pwm_ctrl[nr] = data->pwm_duty[nr]; 820 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 821 } 822 mutex_unlock(&data->update_lock); 823 return count; 824 } 825 static ssize_t set_pwm_freq(struct device *dev, 826 struct device_attribute *attr, const char *buf, size_t count) 827 { 828 struct it87_data *data = dev_get_drvdata(dev); 829 unsigned long val; 830 int i; 831 832 if (strict_strtoul(buf, 10, &val) < 0) 833 return -EINVAL; 834 835 /* Search for the nearest available frequency */ 836 for (i = 0; i < 7; i++) { 837 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2) 838 break; 839 } 840 841 mutex_lock(&data->update_lock); 842 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f; 843 data->fan_ctl |= i << 4; 844 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl); 845 mutex_unlock(&data->update_lock); 846 847 return count; 848 } 849 static ssize_t show_pwm_temp_map(struct device *dev, 850 struct device_attribute *attr, char *buf) 851 { 852 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 853 int nr = sensor_attr->index; 854 855 struct it87_data *data = it87_update_device(dev); 856 int map; 857 858 if (data->pwm_temp_map[nr] < 3) 859 map = 1 << data->pwm_temp_map[nr]; 860 else 861 map = 0; /* Should never happen */ 862 return sprintf(buf, "%d\n", map); 863 } 864 static ssize_t set_pwm_temp_map(struct device *dev, 865 struct device_attribute *attr, const char *buf, size_t count) 866 { 867 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 868 int nr = sensor_attr->index; 869 870 struct it87_data *data = dev_get_drvdata(dev); 871 long val; 872 u8 reg; 873 874 /* This check can go away if we ever support automatic fan speed 875 control on newer chips. */ 876 if (!has_old_autopwm(data)) { 877 dev_notice(dev, "Mapping change disabled for safety reasons\n"); 878 return -EINVAL; 879 } 880 881 if (strict_strtol(buf, 10, &val) < 0) 882 return -EINVAL; 883 884 switch (val) { 885 case (1 << 0): 886 reg = 0x00; 887 break; 888 case (1 << 1): 889 reg = 0x01; 890 break; 891 case (1 << 2): 892 reg = 0x02; 893 break; 894 default: 895 return -EINVAL; 896 } 897 898 mutex_lock(&data->update_lock); 899 data->pwm_temp_map[nr] = reg; 900 /* If we are in automatic mode, write the temp mapping immediately; 901 * otherwise, just store it for later use. */ 902 if (data->pwm_ctrl[nr] & 0x80) { 903 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr]; 904 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]); 905 } 906 mutex_unlock(&data->update_lock); 907 return count; 908 } 909 910 static ssize_t show_auto_pwm(struct device *dev, 911 struct device_attribute *attr, char *buf) 912 { 913 struct it87_data *data = it87_update_device(dev); 914 struct sensor_device_attribute_2 *sensor_attr = 915 to_sensor_dev_attr_2(attr); 916 int nr = sensor_attr->nr; 917 int point = sensor_attr->index; 918 919 return sprintf(buf, "%d\n", PWM_FROM_REG(data->auto_pwm[nr][point])); 920 } 921 922 static ssize_t set_auto_pwm(struct device *dev, 923 struct device_attribute *attr, const char *buf, size_t count) 924 { 925 struct it87_data *data = dev_get_drvdata(dev); 926 struct sensor_device_attribute_2 *sensor_attr = 927 to_sensor_dev_attr_2(attr); 928 int nr = sensor_attr->nr; 929 int point = sensor_attr->index; 930 long val; 931 932 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255) 933 return -EINVAL; 934 935 mutex_lock(&data->update_lock); 936 data->auto_pwm[nr][point] = PWM_TO_REG(val); 937 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point), 938 data->auto_pwm[nr][point]); 939 mutex_unlock(&data->update_lock); 940 return count; 941 } 942 943 static ssize_t show_auto_temp(struct device *dev, 944 struct device_attribute *attr, char *buf) 945 { 946 struct it87_data *data = it87_update_device(dev); 947 struct sensor_device_attribute_2 *sensor_attr = 948 to_sensor_dev_attr_2(attr); 949 int nr = sensor_attr->nr; 950 int point = sensor_attr->index; 951 952 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point])); 953 } 954 955 static ssize_t set_auto_temp(struct device *dev, 956 struct device_attribute *attr, const char *buf, size_t count) 957 { 958 struct it87_data *data = dev_get_drvdata(dev); 959 struct sensor_device_attribute_2 *sensor_attr = 960 to_sensor_dev_attr_2(attr); 961 int nr = sensor_attr->nr; 962 int point = sensor_attr->index; 963 long val; 964 965 if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000) 966 return -EINVAL; 967 968 mutex_lock(&data->update_lock); 969 data->auto_temp[nr][point] = TEMP_TO_REG(val); 970 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point), 971 data->auto_temp[nr][point]); 972 mutex_unlock(&data->update_lock); 973 return count; 974 } 975 976 #define show_fan_offset(offset) \ 977 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 978 show_fan, NULL, offset - 1); \ 979 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 980 show_fan_min, set_fan_min, offset - 1); \ 981 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 982 show_fan_div, set_fan_div, offset - 1); 983 984 show_fan_offset(1); 985 show_fan_offset(2); 986 show_fan_offset(3); 987 988 #define show_pwm_offset(offset) \ 989 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 990 show_pwm_enable, set_pwm_enable, offset - 1); \ 991 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 992 show_pwm, set_pwm, offset - 1); \ 993 static DEVICE_ATTR(pwm##offset##_freq, \ 994 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \ 995 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \ 996 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \ 997 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \ 998 offset - 1); \ 999 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \ 1000 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1001 offset - 1, 0); \ 1002 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \ 1003 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1004 offset - 1, 1); \ 1005 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \ 1006 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \ 1007 offset - 1, 2); \ 1008 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \ 1009 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \ 1010 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \ 1011 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1012 offset - 1, 1); \ 1013 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \ 1014 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1015 offset - 1, 0); \ 1016 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \ 1017 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1018 offset - 1, 2); \ 1019 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \ 1020 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1021 offset - 1, 3); \ 1022 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \ 1023 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \ 1024 offset - 1, 4); 1025 1026 show_pwm_offset(1); 1027 show_pwm_offset(2); 1028 show_pwm_offset(3); 1029 1030 /* A different set of callbacks for 16-bit fans */ 1031 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr, 1032 char *buf) 1033 { 1034 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1035 int nr = sensor_attr->index; 1036 struct it87_data *data = it87_update_device(dev); 1037 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr])); 1038 } 1039 1040 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr, 1041 char *buf) 1042 { 1043 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1044 int nr = sensor_attr->index; 1045 struct it87_data *data = it87_update_device(dev); 1046 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr])); 1047 } 1048 1049 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr, 1050 const char *buf, size_t count) 1051 { 1052 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 1053 int nr = sensor_attr->index; 1054 struct it87_data *data = dev_get_drvdata(dev); 1055 long val; 1056 1057 if (strict_strtol(buf, 10, &val) < 0) 1058 return -EINVAL; 1059 1060 mutex_lock(&data->update_lock); 1061 data->fan_min[nr] = FAN16_TO_REG(val); 1062 it87_write_value(data, IT87_REG_FAN_MIN[nr], 1063 data->fan_min[nr] & 0xff); 1064 it87_write_value(data, IT87_REG_FANX_MIN[nr], 1065 data->fan_min[nr] >> 8); 1066 mutex_unlock(&data->update_lock); 1067 return count; 1068 } 1069 1070 /* We want to use the same sysfs file names as 8-bit fans, but we need 1071 different variable names, so we have to use SENSOR_ATTR instead of 1072 SENSOR_DEVICE_ATTR. */ 1073 #define show_fan16_offset(offset) \ 1074 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \ 1075 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \ 1076 show_fan16, NULL, offset - 1); \ 1077 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \ 1078 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 1079 show_fan16_min, set_fan16_min, offset - 1) 1080 1081 show_fan16_offset(1); 1082 show_fan16_offset(2); 1083 show_fan16_offset(3); 1084 show_fan16_offset(4); 1085 show_fan16_offset(5); 1086 1087 /* Alarms */ 1088 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 1089 char *buf) 1090 { 1091 struct it87_data *data = it87_update_device(dev); 1092 return sprintf(buf, "%u\n", data->alarms); 1093 } 1094 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 1095 1096 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 1097 char *buf) 1098 { 1099 int bitnr = to_sensor_dev_attr(attr)->index; 1100 struct it87_data *data = it87_update_device(dev); 1101 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 1102 } 1103 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8); 1104 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9); 1105 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10); 1106 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11); 1107 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12); 1108 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13); 1109 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14); 1110 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15); 1111 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0); 1112 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1); 1113 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2); 1114 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3); 1115 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6); 1116 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16); 1117 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17); 1118 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18); 1119 1120 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 1121 char *buf) 1122 { 1123 int bitnr = to_sensor_dev_attr(attr)->index; 1124 struct it87_data *data = it87_update_device(dev); 1125 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1); 1126 } 1127 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 1128 const char *buf, size_t count) 1129 { 1130 int bitnr = to_sensor_dev_attr(attr)->index; 1131 struct it87_data *data = dev_get_drvdata(dev); 1132 long val; 1133 1134 if (strict_strtol(buf, 10, &val) < 0 1135 || (val != 0 && val != 1)) 1136 return -EINVAL; 1137 1138 mutex_lock(&data->update_lock); 1139 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE); 1140 if (val) 1141 data->beeps |= (1 << bitnr); 1142 else 1143 data->beeps &= ~(1 << bitnr); 1144 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps); 1145 mutex_unlock(&data->update_lock); 1146 return count; 1147 } 1148 1149 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, 1150 show_beep, set_beep, 1); 1151 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1); 1152 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1); 1153 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1); 1154 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1); 1155 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1); 1156 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1); 1157 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1); 1158 /* fanX_beep writability is set later */ 1159 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0); 1160 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0); 1161 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0); 1162 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0); 1163 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0); 1164 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, 1165 show_beep, set_beep, 2); 1166 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2); 1167 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2); 1168 1169 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr, 1170 char *buf) 1171 { 1172 struct it87_data *data = dev_get_drvdata(dev); 1173 return sprintf(buf, "%u\n", data->vrm); 1174 } 1175 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr, 1176 const char *buf, size_t count) 1177 { 1178 struct it87_data *data = dev_get_drvdata(dev); 1179 unsigned long val; 1180 1181 if (strict_strtoul(buf, 10, &val) < 0) 1182 return -EINVAL; 1183 1184 data->vrm = val; 1185 1186 return count; 1187 } 1188 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 1189 1190 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr, 1191 char *buf) 1192 { 1193 struct it87_data *data = it87_update_device(dev); 1194 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 1195 } 1196 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 1197 1198 static ssize_t show_label(struct device *dev, struct device_attribute *attr, 1199 char *buf) 1200 { 1201 static const char *labels[] = { 1202 "+5V", 1203 "5VSB", 1204 "Vbat", 1205 }; 1206 int nr = to_sensor_dev_attr(attr)->index; 1207 1208 return sprintf(buf, "%s\n", labels[nr]); 1209 } 1210 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0); 1211 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1); 1212 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2); 1213 1214 static ssize_t show_name(struct device *dev, struct device_attribute 1215 *devattr, char *buf) 1216 { 1217 struct it87_data *data = dev_get_drvdata(dev); 1218 return sprintf(buf, "%s\n", data->name); 1219 } 1220 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 1221 1222 static struct attribute *it87_attributes[] = { 1223 &sensor_dev_attr_in0_input.dev_attr.attr, 1224 &sensor_dev_attr_in1_input.dev_attr.attr, 1225 &sensor_dev_attr_in2_input.dev_attr.attr, 1226 &sensor_dev_attr_in3_input.dev_attr.attr, 1227 &sensor_dev_attr_in4_input.dev_attr.attr, 1228 &sensor_dev_attr_in5_input.dev_attr.attr, 1229 &sensor_dev_attr_in6_input.dev_attr.attr, 1230 &sensor_dev_attr_in7_input.dev_attr.attr, 1231 &sensor_dev_attr_in8_input.dev_attr.attr, 1232 &sensor_dev_attr_in0_min.dev_attr.attr, 1233 &sensor_dev_attr_in1_min.dev_attr.attr, 1234 &sensor_dev_attr_in2_min.dev_attr.attr, 1235 &sensor_dev_attr_in3_min.dev_attr.attr, 1236 &sensor_dev_attr_in4_min.dev_attr.attr, 1237 &sensor_dev_attr_in5_min.dev_attr.attr, 1238 &sensor_dev_attr_in6_min.dev_attr.attr, 1239 &sensor_dev_attr_in7_min.dev_attr.attr, 1240 &sensor_dev_attr_in0_max.dev_attr.attr, 1241 &sensor_dev_attr_in1_max.dev_attr.attr, 1242 &sensor_dev_attr_in2_max.dev_attr.attr, 1243 &sensor_dev_attr_in3_max.dev_attr.attr, 1244 &sensor_dev_attr_in4_max.dev_attr.attr, 1245 &sensor_dev_attr_in5_max.dev_attr.attr, 1246 &sensor_dev_attr_in6_max.dev_attr.attr, 1247 &sensor_dev_attr_in7_max.dev_attr.attr, 1248 &sensor_dev_attr_in0_alarm.dev_attr.attr, 1249 &sensor_dev_attr_in1_alarm.dev_attr.attr, 1250 &sensor_dev_attr_in2_alarm.dev_attr.attr, 1251 &sensor_dev_attr_in3_alarm.dev_attr.attr, 1252 &sensor_dev_attr_in4_alarm.dev_attr.attr, 1253 &sensor_dev_attr_in5_alarm.dev_attr.attr, 1254 &sensor_dev_attr_in6_alarm.dev_attr.attr, 1255 &sensor_dev_attr_in7_alarm.dev_attr.attr, 1256 1257 &sensor_dev_attr_temp1_input.dev_attr.attr, 1258 &sensor_dev_attr_temp2_input.dev_attr.attr, 1259 &sensor_dev_attr_temp3_input.dev_attr.attr, 1260 &sensor_dev_attr_temp1_max.dev_attr.attr, 1261 &sensor_dev_attr_temp2_max.dev_attr.attr, 1262 &sensor_dev_attr_temp3_max.dev_attr.attr, 1263 &sensor_dev_attr_temp1_min.dev_attr.attr, 1264 &sensor_dev_attr_temp2_min.dev_attr.attr, 1265 &sensor_dev_attr_temp3_min.dev_attr.attr, 1266 &sensor_dev_attr_temp1_type.dev_attr.attr, 1267 &sensor_dev_attr_temp2_type.dev_attr.attr, 1268 &sensor_dev_attr_temp3_type.dev_attr.attr, 1269 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1270 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1271 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1272 1273 &dev_attr_alarms.attr, 1274 &dev_attr_name.attr, 1275 NULL 1276 }; 1277 1278 static const struct attribute_group it87_group = { 1279 .attrs = it87_attributes, 1280 }; 1281 1282 static struct attribute *it87_attributes_beep[] = { 1283 &sensor_dev_attr_in0_beep.dev_attr.attr, 1284 &sensor_dev_attr_in1_beep.dev_attr.attr, 1285 &sensor_dev_attr_in2_beep.dev_attr.attr, 1286 &sensor_dev_attr_in3_beep.dev_attr.attr, 1287 &sensor_dev_attr_in4_beep.dev_attr.attr, 1288 &sensor_dev_attr_in5_beep.dev_attr.attr, 1289 &sensor_dev_attr_in6_beep.dev_attr.attr, 1290 &sensor_dev_attr_in7_beep.dev_attr.attr, 1291 1292 &sensor_dev_attr_temp1_beep.dev_attr.attr, 1293 &sensor_dev_attr_temp2_beep.dev_attr.attr, 1294 &sensor_dev_attr_temp3_beep.dev_attr.attr, 1295 NULL 1296 }; 1297 1298 static const struct attribute_group it87_group_beep = { 1299 .attrs = it87_attributes_beep, 1300 }; 1301 1302 static struct attribute *it87_attributes_fan16[5][3+1] = { { 1303 &sensor_dev_attr_fan1_input16.dev_attr.attr, 1304 &sensor_dev_attr_fan1_min16.dev_attr.attr, 1305 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1306 NULL 1307 }, { 1308 &sensor_dev_attr_fan2_input16.dev_attr.attr, 1309 &sensor_dev_attr_fan2_min16.dev_attr.attr, 1310 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1311 NULL 1312 }, { 1313 &sensor_dev_attr_fan3_input16.dev_attr.attr, 1314 &sensor_dev_attr_fan3_min16.dev_attr.attr, 1315 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1316 NULL 1317 }, { 1318 &sensor_dev_attr_fan4_input16.dev_attr.attr, 1319 &sensor_dev_attr_fan4_min16.dev_attr.attr, 1320 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1321 NULL 1322 }, { 1323 &sensor_dev_attr_fan5_input16.dev_attr.attr, 1324 &sensor_dev_attr_fan5_min16.dev_attr.attr, 1325 &sensor_dev_attr_fan5_alarm.dev_attr.attr, 1326 NULL 1327 } }; 1328 1329 static const struct attribute_group it87_group_fan16[5] = { 1330 { .attrs = it87_attributes_fan16[0] }, 1331 { .attrs = it87_attributes_fan16[1] }, 1332 { .attrs = it87_attributes_fan16[2] }, 1333 { .attrs = it87_attributes_fan16[3] }, 1334 { .attrs = it87_attributes_fan16[4] }, 1335 }; 1336 1337 static struct attribute *it87_attributes_fan[3][4+1] = { { 1338 &sensor_dev_attr_fan1_input.dev_attr.attr, 1339 &sensor_dev_attr_fan1_min.dev_attr.attr, 1340 &sensor_dev_attr_fan1_div.dev_attr.attr, 1341 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1342 NULL 1343 }, { 1344 &sensor_dev_attr_fan2_input.dev_attr.attr, 1345 &sensor_dev_attr_fan2_min.dev_attr.attr, 1346 &sensor_dev_attr_fan2_div.dev_attr.attr, 1347 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1348 NULL 1349 }, { 1350 &sensor_dev_attr_fan3_input.dev_attr.attr, 1351 &sensor_dev_attr_fan3_min.dev_attr.attr, 1352 &sensor_dev_attr_fan3_div.dev_attr.attr, 1353 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1354 NULL 1355 } }; 1356 1357 static const struct attribute_group it87_group_fan[3] = { 1358 { .attrs = it87_attributes_fan[0] }, 1359 { .attrs = it87_attributes_fan[1] }, 1360 { .attrs = it87_attributes_fan[2] }, 1361 }; 1362 1363 static const struct attribute_group * 1364 it87_get_fan_group(const struct it87_data *data) 1365 { 1366 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan; 1367 } 1368 1369 static struct attribute *it87_attributes_pwm[3][4+1] = { { 1370 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1371 &sensor_dev_attr_pwm1.dev_attr.attr, 1372 &dev_attr_pwm1_freq.attr, 1373 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, 1374 NULL 1375 }, { 1376 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1377 &sensor_dev_attr_pwm2.dev_attr.attr, 1378 &dev_attr_pwm2_freq.attr, 1379 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr, 1380 NULL 1381 }, { 1382 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1383 &sensor_dev_attr_pwm3.dev_attr.attr, 1384 &dev_attr_pwm3_freq.attr, 1385 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, 1386 NULL 1387 } }; 1388 1389 static const struct attribute_group it87_group_pwm[3] = { 1390 { .attrs = it87_attributes_pwm[0] }, 1391 { .attrs = it87_attributes_pwm[1] }, 1392 { .attrs = it87_attributes_pwm[2] }, 1393 }; 1394 1395 static struct attribute *it87_attributes_autopwm[3][9+1] = { { 1396 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1397 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1398 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 1399 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 1400 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 1401 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 1402 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 1403 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 1404 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 1405 NULL 1406 }, { 1407 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, 1408 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, 1409 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr, 1410 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr, 1411 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr, 1412 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr, 1413 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr, 1414 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr, 1415 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr, 1416 NULL 1417 }, { 1418 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, 1419 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, 1420 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr, 1421 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr, 1422 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr, 1423 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr, 1424 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr, 1425 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr, 1426 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr, 1427 NULL 1428 } }; 1429 1430 static const struct attribute_group it87_group_autopwm[3] = { 1431 { .attrs = it87_attributes_autopwm[0] }, 1432 { .attrs = it87_attributes_autopwm[1] }, 1433 { .attrs = it87_attributes_autopwm[2] }, 1434 }; 1435 1436 static struct attribute *it87_attributes_fan_beep[] = { 1437 &sensor_dev_attr_fan1_beep.dev_attr.attr, 1438 &sensor_dev_attr_fan2_beep.dev_attr.attr, 1439 &sensor_dev_attr_fan3_beep.dev_attr.attr, 1440 &sensor_dev_attr_fan4_beep.dev_attr.attr, 1441 &sensor_dev_attr_fan5_beep.dev_attr.attr, 1442 }; 1443 1444 static struct attribute *it87_attributes_vid[] = { 1445 &dev_attr_vrm.attr, 1446 &dev_attr_cpu0_vid.attr, 1447 NULL 1448 }; 1449 1450 static const struct attribute_group it87_group_vid = { 1451 .attrs = it87_attributes_vid, 1452 }; 1453 1454 static struct attribute *it87_attributes_label[] = { 1455 &sensor_dev_attr_in3_label.dev_attr.attr, 1456 &sensor_dev_attr_in7_label.dev_attr.attr, 1457 &sensor_dev_attr_in8_label.dev_attr.attr, 1458 NULL 1459 }; 1460 1461 static const struct attribute_group it87_group_label = { 1462 .attrs = it87_attributes_vid, 1463 }; 1464 1465 /* SuperIO detection - will change isa_address if a chip is found */ 1466 static int __init it87_find(unsigned short *address, 1467 struct it87_sio_data *sio_data) 1468 { 1469 int err = -ENODEV; 1470 u16 chip_type; 1471 const char *board_vendor, *board_name; 1472 1473 superio_enter(); 1474 chip_type = force_id ? force_id : superio_inw(DEVID); 1475 1476 switch (chip_type) { 1477 case IT8705F_DEVID: 1478 sio_data->type = it87; 1479 break; 1480 case IT8712F_DEVID: 1481 sio_data->type = it8712; 1482 break; 1483 case IT8716F_DEVID: 1484 case IT8726F_DEVID: 1485 sio_data->type = it8716; 1486 break; 1487 case IT8718F_DEVID: 1488 sio_data->type = it8718; 1489 break; 1490 case IT8720F_DEVID: 1491 sio_data->type = it8720; 1492 break; 1493 case 0xffff: /* No device at all */ 1494 goto exit; 1495 default: 1496 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n", 1497 chip_type); 1498 goto exit; 1499 } 1500 1501 superio_select(PME); 1502 if (!(superio_inb(IT87_ACT_REG) & 0x01)) { 1503 pr_info("it87: Device not activated, skipping\n"); 1504 goto exit; 1505 } 1506 1507 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); 1508 if (*address == 0) { 1509 pr_info("it87: Base address not set, skipping\n"); 1510 goto exit; 1511 } 1512 1513 err = 0; 1514 sio_data->revision = superio_inb(DEVREV) & 0x0f; 1515 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n", 1516 chip_type, *address, sio_data->revision); 1517 1518 /* in8 (Vbat) is always internal */ 1519 sio_data->internal = (1 << 2); 1520 1521 /* Read GPIO config and VID value from LDN 7 (GPIO) */ 1522 if (sio_data->type == it87) { 1523 /* The IT8705F doesn't have VID pins at all */ 1524 sio_data->skip_vid = 1; 1525 1526 /* The IT8705F has a different LD number for GPIO */ 1527 superio_select(5); 1528 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1529 } else { 1530 int reg; 1531 1532 superio_select(GPIO); 1533 /* We need at least 4 VID pins */ 1534 reg = superio_inb(IT87_SIO_GPIO3_REG); 1535 if (reg & 0x0f) { 1536 pr_info("it87: VID is disabled (pins used for GPIO)\n"); 1537 sio_data->skip_vid = 1; 1538 } 1539 1540 /* Check if fan3 is there or not */ 1541 if (reg & (1 << 6)) 1542 sio_data->skip_pwm |= (1 << 2); 1543 if (reg & (1 << 7)) 1544 sio_data->skip_fan |= (1 << 2); 1545 1546 /* Check if fan2 is there or not */ 1547 reg = superio_inb(IT87_SIO_GPIO5_REG); 1548 if (reg & (1 << 1)) 1549 sio_data->skip_pwm |= (1 << 1); 1550 if (reg & (1 << 2)) 1551 sio_data->skip_fan |= (1 << 1); 1552 1553 if ((sio_data->type == it8718 || sio_data->type == it8720) 1554 && !(sio_data->skip_vid)) 1555 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG); 1556 1557 reg = superio_inb(IT87_SIO_PINX2_REG); 1558 /* 1559 * The IT8720F has no VIN7 pin, so VCCH should always be 1560 * routed internally to VIN7 with an internal divider. 1561 * Curiously, there still is a configuration bit to control 1562 * this, which means it can be set incorrectly. And even 1563 * more curiously, many boards out there are improperly 1564 * configured, even though the IT8720F datasheet claims 1565 * that the internal routing of VCCH to VIN7 is the default 1566 * setting. So we force the internal routing in this case. 1567 */ 1568 if (sio_data->type == it8720 && !(reg & (1 << 1))) { 1569 reg |= (1 << 1); 1570 superio_outb(IT87_SIO_PINX2_REG, reg); 1571 pr_notice("it87: Routing internal VCCH to in7\n"); 1572 } 1573 if (reg & (1 << 0)) 1574 sio_data->internal |= (1 << 0); 1575 if (reg & (1 << 1)) 1576 sio_data->internal |= (1 << 1); 1577 1578 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f; 1579 } 1580 if (sio_data->beep_pin) 1581 pr_info("it87: Beeping is supported\n"); 1582 1583 /* Disable specific features based on DMI strings */ 1584 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR); 1585 board_name = dmi_get_system_info(DMI_BOARD_NAME); 1586 if (board_vendor && board_name) { 1587 if (strcmp(board_vendor, "nVIDIA") == 0 1588 && strcmp(board_name, "FN68PT") == 0) { 1589 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not 1590 connected to a fan, but to something else. One user 1591 has reported instant system power-off when changing 1592 the PWM2 duty cycle, so we disable it. 1593 I use the board name string as the trigger in case 1594 the same board is ever used in other systems. */ 1595 pr_info("it87: Disabling pwm2 due to " 1596 "hardware constraints\n"); 1597 sio_data->skip_pwm = (1 << 1); 1598 } 1599 } 1600 1601 exit: 1602 superio_exit(); 1603 return err; 1604 } 1605 1606 static void it87_remove_files(struct device *dev) 1607 { 1608 struct it87_data *data = platform_get_drvdata(pdev); 1609 struct it87_sio_data *sio_data = dev->platform_data; 1610 const struct attribute_group *fan_group = it87_get_fan_group(data); 1611 int i; 1612 1613 sysfs_remove_group(&dev->kobj, &it87_group); 1614 if (sio_data->beep_pin) 1615 sysfs_remove_group(&dev->kobj, &it87_group_beep); 1616 for (i = 0; i < 5; i++) { 1617 if (!(data->has_fan & (1 << i))) 1618 continue; 1619 sysfs_remove_group(&dev->kobj, &fan_group[i]); 1620 if (sio_data->beep_pin) 1621 sysfs_remove_file(&dev->kobj, 1622 it87_attributes_fan_beep[i]); 1623 } 1624 for (i = 0; i < 3; i++) { 1625 if (sio_data->skip_pwm & (1 << 0)) 1626 continue; 1627 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]); 1628 if (has_old_autopwm(data)) 1629 sysfs_remove_group(&dev->kobj, 1630 &it87_group_autopwm[i]); 1631 } 1632 if (!sio_data->skip_vid) 1633 sysfs_remove_group(&dev->kobj, &it87_group_vid); 1634 sysfs_remove_group(&dev->kobj, &it87_group_label); 1635 } 1636 1637 static int __devinit it87_probe(struct platform_device *pdev) 1638 { 1639 struct it87_data *data; 1640 struct resource *res; 1641 struct device *dev = &pdev->dev; 1642 struct it87_sio_data *sio_data = dev->platform_data; 1643 const struct attribute_group *fan_group; 1644 int err = 0, i; 1645 int enable_pwm_interface; 1646 int fan_beep_need_rw; 1647 static const char *names[] = { 1648 "it87", 1649 "it8712", 1650 "it8716", 1651 "it8718", 1652 "it8720", 1653 }; 1654 1655 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1656 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) { 1657 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", 1658 (unsigned long)res->start, 1659 (unsigned long)(res->start + IT87_EC_EXTENT - 1)); 1660 err = -EBUSY; 1661 goto ERROR0; 1662 } 1663 1664 data = kzalloc(sizeof(struct it87_data), GFP_KERNEL); 1665 if (!data) { 1666 err = -ENOMEM; 1667 goto ERROR1; 1668 } 1669 1670 data->addr = res->start; 1671 data->type = sio_data->type; 1672 data->revision = sio_data->revision; 1673 data->name = names[sio_data->type]; 1674 1675 /* Now, we do the remaining detection. */ 1676 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80) 1677 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) { 1678 err = -ENODEV; 1679 goto ERROR2; 1680 } 1681 1682 platform_set_drvdata(pdev, data); 1683 1684 mutex_init(&data->update_lock); 1685 1686 /* Check PWM configuration */ 1687 enable_pwm_interface = it87_check_pwm(dev); 1688 1689 /* Initialize the IT87 chip */ 1690 it87_init_device(pdev); 1691 1692 /* Register sysfs hooks */ 1693 err = sysfs_create_group(&dev->kobj, &it87_group); 1694 if (err) 1695 goto ERROR2; 1696 1697 if (sio_data->beep_pin) { 1698 err = sysfs_create_group(&dev->kobj, &it87_group_beep); 1699 if (err) 1700 goto ERROR4; 1701 } 1702 1703 /* Do not create fan files for disabled fans */ 1704 fan_group = it87_get_fan_group(data); 1705 fan_beep_need_rw = 1; 1706 for (i = 0; i < 5; i++) { 1707 if (!(data->has_fan & (1 << i))) 1708 continue; 1709 err = sysfs_create_group(&dev->kobj, &fan_group[i]); 1710 if (err) 1711 goto ERROR4; 1712 1713 if (sio_data->beep_pin) { 1714 err = sysfs_create_file(&dev->kobj, 1715 it87_attributes_fan_beep[i]); 1716 if (err) 1717 goto ERROR4; 1718 if (!fan_beep_need_rw) 1719 continue; 1720 1721 /* As we have a single beep enable bit for all fans, 1722 * only the first enabled fan has a writable attribute 1723 * for it. */ 1724 if (sysfs_chmod_file(&dev->kobj, 1725 it87_attributes_fan_beep[i], 1726 S_IRUGO | S_IWUSR)) 1727 dev_dbg(dev, "chmod +w fan%d_beep failed\n", 1728 i + 1); 1729 fan_beep_need_rw = 0; 1730 } 1731 } 1732 1733 if (enable_pwm_interface) { 1734 for (i = 0; i < 3; i++) { 1735 if (sio_data->skip_pwm & (1 << i)) 1736 continue; 1737 err = sysfs_create_group(&dev->kobj, 1738 &it87_group_pwm[i]); 1739 if (err) 1740 goto ERROR4; 1741 1742 if (!has_old_autopwm(data)) 1743 continue; 1744 err = sysfs_create_group(&dev->kobj, 1745 &it87_group_autopwm[i]); 1746 if (err) 1747 goto ERROR4; 1748 } 1749 } 1750 1751 if (!sio_data->skip_vid) { 1752 data->vrm = vid_which_vrm(); 1753 /* VID reading from Super-I/O config space if available */ 1754 data->vid = sio_data->vid_value; 1755 err = sysfs_create_group(&dev->kobj, &it87_group_vid); 1756 if (err) 1757 goto ERROR4; 1758 } 1759 1760 /* Export labels for internal sensors */ 1761 for (i = 0; i < 3; i++) { 1762 if (!(sio_data->internal & (1 << i))) 1763 continue; 1764 err = sysfs_create_file(&dev->kobj, 1765 it87_attributes_label[i]); 1766 if (err) 1767 goto ERROR4; 1768 } 1769 1770 data->hwmon_dev = hwmon_device_register(dev); 1771 if (IS_ERR(data->hwmon_dev)) { 1772 err = PTR_ERR(data->hwmon_dev); 1773 goto ERROR4; 1774 } 1775 1776 return 0; 1777 1778 ERROR4: 1779 it87_remove_files(dev); 1780 ERROR2: 1781 platform_set_drvdata(pdev, NULL); 1782 kfree(data); 1783 ERROR1: 1784 release_region(res->start, IT87_EC_EXTENT); 1785 ERROR0: 1786 return err; 1787 } 1788 1789 static int __devexit it87_remove(struct platform_device *pdev) 1790 { 1791 struct it87_data *data = platform_get_drvdata(pdev); 1792 1793 hwmon_device_unregister(data->hwmon_dev); 1794 it87_remove_files(&pdev->dev); 1795 1796 release_region(data->addr, IT87_EC_EXTENT); 1797 platform_set_drvdata(pdev, NULL); 1798 kfree(data); 1799 1800 return 0; 1801 } 1802 1803 /* Must be called with data->update_lock held, except during initialization. 1804 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1805 would slow down the IT87 access and should not be necessary. */ 1806 static int it87_read_value(struct it87_data *data, u8 reg) 1807 { 1808 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1809 return inb_p(data->addr + IT87_DATA_REG_OFFSET); 1810 } 1811 1812 /* Must be called with data->update_lock held, except during initialization. 1813 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1814 would slow down the IT87 access and should not be necessary. */ 1815 static void it87_write_value(struct it87_data *data, u8 reg, u8 value) 1816 { 1817 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1818 outb_p(value, data->addr + IT87_DATA_REG_OFFSET); 1819 } 1820 1821 /* Return 1 if and only if the PWM interface is safe to use */ 1822 static int __devinit it87_check_pwm(struct device *dev) 1823 { 1824 struct it87_data *data = dev_get_drvdata(dev); 1825 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off 1826 * and polarity set to active low is sign that this is the case so we 1827 * disable pwm control to protect the user. */ 1828 int tmp = it87_read_value(data, IT87_REG_FAN_CTL); 1829 if ((tmp & 0x87) == 0) { 1830 if (fix_pwm_polarity) { 1831 /* The user asks us to attempt a chip reconfiguration. 1832 * This means switching to active high polarity and 1833 * inverting all fan speed values. */ 1834 int i; 1835 u8 pwm[3]; 1836 1837 for (i = 0; i < 3; i++) 1838 pwm[i] = it87_read_value(data, 1839 IT87_REG_PWM(i)); 1840 1841 /* If any fan is in automatic pwm mode, the polarity 1842 * might be correct, as suspicious as it seems, so we 1843 * better don't change anything (but still disable the 1844 * PWM interface). */ 1845 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) { 1846 dev_info(dev, "Reconfiguring PWM to " 1847 "active high polarity\n"); 1848 it87_write_value(data, IT87_REG_FAN_CTL, 1849 tmp | 0x87); 1850 for (i = 0; i < 3; i++) 1851 it87_write_value(data, 1852 IT87_REG_PWM(i), 1853 0x7f & ~pwm[i]); 1854 return 1; 1855 } 1856 1857 dev_info(dev, "PWM configuration is " 1858 "too broken to be fixed\n"); 1859 } 1860 1861 dev_info(dev, "Detected broken BIOS " 1862 "defaults, disabling PWM interface\n"); 1863 return 0; 1864 } else if (fix_pwm_polarity) { 1865 dev_info(dev, "PWM configuration looks " 1866 "sane, won't touch\n"); 1867 } 1868 1869 return 1; 1870 } 1871 1872 /* Called when we have found a new IT87. */ 1873 static void __devinit it87_init_device(struct platform_device *pdev) 1874 { 1875 struct it87_sio_data *sio_data = pdev->dev.platform_data; 1876 struct it87_data *data = platform_get_drvdata(pdev); 1877 int tmp, i; 1878 u8 mask; 1879 1880 /* For each PWM channel: 1881 * - If it is in automatic mode, setting to manual mode should set 1882 * the fan to full speed by default. 1883 * - If it is in manual mode, we need a mapping to temperature 1884 * channels to use when later setting to automatic mode later. 1885 * Use a 1:1 mapping by default (we are clueless.) 1886 * In both cases, the value can (and should) be changed by the user 1887 * prior to switching to a different mode. */ 1888 for (i = 0; i < 3; i++) { 1889 data->pwm_temp_map[i] = i; 1890 data->pwm_duty[i] = 0x7f; /* Full speed */ 1891 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */ 1892 } 1893 1894 /* Some chips seem to have default value 0xff for all limit 1895 * registers. For low voltage limits it makes no sense and triggers 1896 * alarms, so change to 0 instead. For high temperature limits, it 1897 * means -1 degree C, which surprisingly doesn't trigger an alarm, 1898 * but is still confusing, so change to 127 degrees C. */ 1899 for (i = 0; i < 8; i++) { 1900 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i)); 1901 if (tmp == 0xff) 1902 it87_write_value(data, IT87_REG_VIN_MIN(i), 0); 1903 } 1904 for (i = 0; i < 3; i++) { 1905 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1906 if (tmp == 0xff) 1907 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127); 1908 } 1909 1910 /* Temperature channels are not forcibly enabled, as they can be 1911 * set to two different sensor types and we can't guess which one 1912 * is correct for a given system. These channels can be enabled at 1913 * run-time through the temp{1-3}_type sysfs accessors if needed. */ 1914 1915 /* Check if voltage monitors are reset manually or by some reason */ 1916 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE); 1917 if ((tmp & 0xff) == 0) { 1918 /* Enable all voltage monitors */ 1919 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff); 1920 } 1921 1922 /* Check if tachometers are reset manually or by some reason */ 1923 mask = 0x70 & ~(sio_data->skip_fan << 4); 1924 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL); 1925 if ((data->fan_main_ctrl & mask) == 0) { 1926 /* Enable all fan tachometers */ 1927 data->fan_main_ctrl |= mask; 1928 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, 1929 data->fan_main_ctrl); 1930 } 1931 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07; 1932 1933 /* Set tachometers to 16-bit mode if needed */ 1934 if (has_16bit_fans(data)) { 1935 tmp = it87_read_value(data, IT87_REG_FAN_16BIT); 1936 if (~tmp & 0x07 & data->has_fan) { 1937 dev_dbg(&pdev->dev, 1938 "Setting fan1-3 to 16-bit mode\n"); 1939 it87_write_value(data, IT87_REG_FAN_16BIT, 1940 tmp | 0x07); 1941 } 1942 /* IT8705F only supports three fans. */ 1943 if (data->type != it87) { 1944 if (tmp & (1 << 4)) 1945 data->has_fan |= (1 << 3); /* fan4 enabled */ 1946 if (tmp & (1 << 5)) 1947 data->has_fan |= (1 << 4); /* fan5 enabled */ 1948 } 1949 } 1950 1951 /* Fan input pins may be used for alternative functions */ 1952 data->has_fan &= ~sio_data->skip_fan; 1953 1954 /* Start monitoring */ 1955 it87_write_value(data, IT87_REG_CONFIG, 1956 (it87_read_value(data, IT87_REG_CONFIG) & 0x36) 1957 | (update_vbat ? 0x41 : 0x01)); 1958 } 1959 1960 static void it87_update_pwm_ctrl(struct it87_data *data, int nr) 1961 { 1962 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr)); 1963 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */ 1964 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03; 1965 else /* Manual mode */ 1966 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f; 1967 1968 if (has_old_autopwm(data)) { 1969 int i; 1970 1971 for (i = 0; i < 5 ; i++) 1972 data->auto_temp[nr][i] = it87_read_value(data, 1973 IT87_REG_AUTO_TEMP(nr, i)); 1974 for (i = 0; i < 3 ; i++) 1975 data->auto_pwm[nr][i] = it87_read_value(data, 1976 IT87_REG_AUTO_PWM(nr, i)); 1977 } 1978 } 1979 1980 static struct it87_data *it87_update_device(struct device *dev) 1981 { 1982 struct it87_data *data = dev_get_drvdata(dev); 1983 int i; 1984 1985 mutex_lock(&data->update_lock); 1986 1987 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 1988 || !data->valid) { 1989 if (update_vbat) { 1990 /* Cleared after each update, so reenable. Value 1991 returned by this read will be previous value */ 1992 it87_write_value(data, IT87_REG_CONFIG, 1993 it87_read_value(data, IT87_REG_CONFIG) | 0x40); 1994 } 1995 for (i = 0; i <= 7; i++) { 1996 data->in[i] = 1997 it87_read_value(data, IT87_REG_VIN(i)); 1998 data->in_min[i] = 1999 it87_read_value(data, IT87_REG_VIN_MIN(i)); 2000 data->in_max[i] = 2001 it87_read_value(data, IT87_REG_VIN_MAX(i)); 2002 } 2003 /* in8 (battery) has no limit registers */ 2004 data->in[8] = it87_read_value(data, IT87_REG_VIN(8)); 2005 2006 for (i = 0; i < 5; i++) { 2007 /* Skip disabled fans */ 2008 if (!(data->has_fan & (1 << i))) 2009 continue; 2010 2011 data->fan_min[i] = 2012 it87_read_value(data, IT87_REG_FAN_MIN[i]); 2013 data->fan[i] = it87_read_value(data, 2014 IT87_REG_FAN[i]); 2015 /* Add high byte if in 16-bit mode */ 2016 if (has_16bit_fans(data)) { 2017 data->fan[i] |= it87_read_value(data, 2018 IT87_REG_FANX[i]) << 8; 2019 data->fan_min[i] |= it87_read_value(data, 2020 IT87_REG_FANX_MIN[i]) << 8; 2021 } 2022 } 2023 for (i = 0; i < 3; i++) { 2024 data->temp[i] = 2025 it87_read_value(data, IT87_REG_TEMP(i)); 2026 data->temp_high[i] = 2027 it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 2028 data->temp_low[i] = 2029 it87_read_value(data, IT87_REG_TEMP_LOW(i)); 2030 } 2031 2032 /* Newer chips don't have clock dividers */ 2033 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) { 2034 i = it87_read_value(data, IT87_REG_FAN_DIV); 2035 data->fan_div[0] = i & 0x07; 2036 data->fan_div[1] = (i >> 3) & 0x07; 2037 data->fan_div[2] = (i & 0x40) ? 3 : 1; 2038 } 2039 2040 data->alarms = 2041 it87_read_value(data, IT87_REG_ALARM1) | 2042 (it87_read_value(data, IT87_REG_ALARM2) << 8) | 2043 (it87_read_value(data, IT87_REG_ALARM3) << 16); 2044 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE); 2045 2046 data->fan_main_ctrl = it87_read_value(data, 2047 IT87_REG_FAN_MAIN_CTRL); 2048 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL); 2049 for (i = 0; i < 3; i++) 2050 it87_update_pwm_ctrl(data, i); 2051 2052 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE); 2053 /* The 8705 does not have VID capability. 2054 The 8718 and the 8720 don't use IT87_REG_VID for the 2055 same purpose. */ 2056 if (data->type == it8712 || data->type == it8716) { 2057 data->vid = it87_read_value(data, IT87_REG_VID); 2058 /* The older IT8712F revisions had only 5 VID pins, 2059 but we assume it is always safe to read 6 bits. */ 2060 data->vid &= 0x3f; 2061 } 2062 data->last_updated = jiffies; 2063 data->valid = 1; 2064 } 2065 2066 mutex_unlock(&data->update_lock); 2067 2068 return data; 2069 } 2070 2071 static int __init it87_device_add(unsigned short address, 2072 const struct it87_sio_data *sio_data) 2073 { 2074 struct resource res = { 2075 .start = address + IT87_EC_OFFSET, 2076 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1, 2077 .name = DRVNAME, 2078 .flags = IORESOURCE_IO, 2079 }; 2080 int err; 2081 2082 err = acpi_check_resource_conflict(&res); 2083 if (err) 2084 goto exit; 2085 2086 pdev = platform_device_alloc(DRVNAME, address); 2087 if (!pdev) { 2088 err = -ENOMEM; 2089 printk(KERN_ERR DRVNAME ": Device allocation failed\n"); 2090 goto exit; 2091 } 2092 2093 err = platform_device_add_resources(pdev, &res, 1); 2094 if (err) { 2095 printk(KERN_ERR DRVNAME ": Device resource addition failed " 2096 "(%d)\n", err); 2097 goto exit_device_put; 2098 } 2099 2100 err = platform_device_add_data(pdev, sio_data, 2101 sizeof(struct it87_sio_data)); 2102 if (err) { 2103 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n"); 2104 goto exit_device_put; 2105 } 2106 2107 err = platform_device_add(pdev); 2108 if (err) { 2109 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", 2110 err); 2111 goto exit_device_put; 2112 } 2113 2114 return 0; 2115 2116 exit_device_put: 2117 platform_device_put(pdev); 2118 exit: 2119 return err; 2120 } 2121 2122 static int __init sm_it87_init(void) 2123 { 2124 int err; 2125 unsigned short isa_address = 0; 2126 struct it87_sio_data sio_data; 2127 2128 memset(&sio_data, 0, sizeof(struct it87_sio_data)); 2129 err = it87_find(&isa_address, &sio_data); 2130 if (err) 2131 return err; 2132 err = platform_driver_register(&it87_driver); 2133 if (err) 2134 return err; 2135 2136 err = it87_device_add(isa_address, &sio_data); 2137 if (err) { 2138 platform_driver_unregister(&it87_driver); 2139 return err; 2140 } 2141 2142 return 0; 2143 } 2144 2145 static void __exit sm_it87_exit(void) 2146 { 2147 platform_device_unregister(pdev); 2148 platform_driver_unregister(&it87_driver); 2149 } 2150 2151 2152 MODULE_AUTHOR("Chris Gauthron, " 2153 "Jean Delvare <khali@linux-fr.org>"); 2154 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8720F/8726F, SiS950 driver"); 2155 module_param(update_vbat, bool, 0); 2156 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); 2157 module_param(fix_pwm_polarity, bool, 0); 2158 MODULE_PARM_DESC(fix_pwm_polarity, 2159 "Force PWM polarity to active high (DANGEROUS)"); 2160 MODULE_LICENSE("GPL"); 2161 2162 module_init(sm_it87_init); 2163 module_exit(sm_it87_exit); 2164