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) 2005-2007 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_PINX2_REG 0x2c /* Pin selection */ 128 #define IT87_SIO_VID_REG 0xfc /* VID value */ 129 130 /* Update battery voltage after every reading if true */ 131 static int update_vbat; 132 133 /* Not all BIOSes properly configure the PWM registers */ 134 static int fix_pwm_polarity; 135 136 /* Many IT87 constants specified below */ 137 138 /* Length of ISA address segment */ 139 #define IT87_EXTENT 8 140 141 /* Length of ISA address segment for Environmental Controller */ 142 #define IT87_EC_EXTENT 2 143 144 /* Offset of EC registers from ISA base address */ 145 #define IT87_EC_OFFSET 5 146 147 /* Where are the ISA address/data registers relative to the EC base address */ 148 #define IT87_ADDR_REG_OFFSET 0 149 #define IT87_DATA_REG_OFFSET 1 150 151 /*----- The IT87 registers -----*/ 152 153 #define IT87_REG_CONFIG 0x00 154 155 #define IT87_REG_ALARM1 0x01 156 #define IT87_REG_ALARM2 0x02 157 #define IT87_REG_ALARM3 0x03 158 159 /* The IT8718F and IT8720F have the VID value in a different register, in 160 Super-I/O configuration space. */ 161 #define IT87_REG_VID 0x0a 162 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b 163 for fan divisors. Later IT8712F revisions must use 16-bit tachometer 164 mode. */ 165 #define IT87_REG_FAN_DIV 0x0b 166 #define IT87_REG_FAN_16BIT 0x0c 167 168 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */ 169 170 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 }; 171 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 }; 172 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 }; 173 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 }; 174 #define IT87_REG_FAN_MAIN_CTRL 0x13 175 #define IT87_REG_FAN_CTL 0x14 176 #define IT87_REG_PWM(nr) (0x15 + (nr)) 177 178 #define IT87_REG_VIN(nr) (0x20 + (nr)) 179 #define IT87_REG_TEMP(nr) (0x29 + (nr)) 180 181 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2) 182 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2) 183 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2) 184 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2) 185 186 #define IT87_REG_VIN_ENABLE 0x50 187 #define IT87_REG_TEMP_ENABLE 0x51 188 189 #define IT87_REG_CHIPID 0x58 190 191 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255)) 192 #define IN_FROM_REG(val) ((val) * 16) 193 194 static inline u8 FAN_TO_REG(long rpm, int div) 195 { 196 if (rpm == 0) 197 return 255; 198 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 199 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 200 254); 201 } 202 203 static inline u16 FAN16_TO_REG(long rpm) 204 { 205 if (rpm == 0) 206 return 0xffff; 207 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe); 208 } 209 210 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div))) 211 /* The divider is fixed to 2 in 16-bit mode */ 212 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2)) 213 214 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\ 215 ((val)+500)/1000),-128,127)) 216 #define TEMP_FROM_REG(val) ((val) * 1000) 217 218 #define PWM_TO_REG(val) ((val) >> 1) 219 #define PWM_FROM_REG(val) (((val)&0x7f) << 1) 220 221 static int DIV_TO_REG(int val) 222 { 223 int answer = 0; 224 while (answer < 7 && (val >>= 1)) 225 answer++; 226 return answer; 227 } 228 #define DIV_FROM_REG(val) (1 << (val)) 229 230 static const unsigned int pwm_freq[8] = { 231 48000000 / 128, 232 24000000 / 128, 233 12000000 / 128, 234 8000000 / 128, 235 6000000 / 128, 236 3000000 / 128, 237 1500000 / 128, 238 750000 / 128, 239 }; 240 241 242 struct it87_sio_data { 243 enum chips type; 244 /* Values read from Super-I/O config space */ 245 u8 revision; 246 u8 vid_value; 247 /* Values set based on DMI strings */ 248 u8 skip_pwm; 249 }; 250 251 /* For each registered chip, we need to keep some data in memory. 252 The structure is dynamically allocated. */ 253 struct it87_data { 254 struct device *hwmon_dev; 255 enum chips type; 256 u8 revision; 257 258 unsigned short addr; 259 const char *name; 260 struct mutex update_lock; 261 char valid; /* !=0 if following fields are valid */ 262 unsigned long last_updated; /* In jiffies */ 263 264 u8 in[9]; /* Register value */ 265 u8 in_max[8]; /* Register value */ 266 u8 in_min[8]; /* Register value */ 267 u8 has_fan; /* Bitfield, fans enabled */ 268 u16 fan[5]; /* Register values, possibly combined */ 269 u16 fan_min[5]; /* Register values, possibly combined */ 270 s8 temp[3]; /* Register value */ 271 s8 temp_high[3]; /* Register value */ 272 s8 temp_low[3]; /* Register value */ 273 u8 sensor; /* Register value */ 274 u8 fan_div[3]; /* Register encoding, shifted right */ 275 u8 vid; /* Register encoding, combined */ 276 u8 vrm; 277 u32 alarms; /* Register encoding, combined */ 278 u8 fan_main_ctrl; /* Register value */ 279 u8 fan_ctl; /* Register value */ 280 u8 manual_pwm_ctl[3]; /* manual PWM value set by user */ 281 }; 282 283 static inline int has_16bit_fans(const struct it87_data *data) 284 { 285 /* IT8705F Datasheet 0.4.1, 3h == Version G. 286 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J. 287 These are the first revisions with 16bit tachometer support. */ 288 return (data->type == it87 && data->revision >= 0x03) 289 || (data->type == it8712 && data->revision >= 0x08) 290 || data->type == it8716 291 || data->type == it8718 292 || data->type == it8720; 293 } 294 295 static int it87_probe(struct platform_device *pdev); 296 static int __devexit it87_remove(struct platform_device *pdev); 297 298 static int it87_read_value(struct it87_data *data, u8 reg); 299 static void it87_write_value(struct it87_data *data, u8 reg, u8 value); 300 static struct it87_data *it87_update_device(struct device *dev); 301 static int it87_check_pwm(struct device *dev); 302 static void it87_init_device(struct platform_device *pdev); 303 304 305 static struct platform_driver it87_driver = { 306 .driver = { 307 .owner = THIS_MODULE, 308 .name = DRVNAME, 309 }, 310 .probe = it87_probe, 311 .remove = __devexit_p(it87_remove), 312 }; 313 314 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 315 char *buf) 316 { 317 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 318 int nr = sensor_attr->index; 319 320 struct it87_data *data = it87_update_device(dev); 321 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); 322 } 323 324 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 325 char *buf) 326 { 327 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 328 int nr = sensor_attr->index; 329 330 struct it87_data *data = it87_update_device(dev); 331 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); 332 } 333 334 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 335 char *buf) 336 { 337 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 338 int nr = sensor_attr->index; 339 340 struct it87_data *data = it87_update_device(dev); 341 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); 342 } 343 344 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 345 const char *buf, size_t count) 346 { 347 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 348 int nr = sensor_attr->index; 349 350 struct it87_data *data = dev_get_drvdata(dev); 351 unsigned long val = simple_strtoul(buf, NULL, 10); 352 353 mutex_lock(&data->update_lock); 354 data->in_min[nr] = IN_TO_REG(val); 355 it87_write_value(data, IT87_REG_VIN_MIN(nr), 356 data->in_min[nr]); 357 mutex_unlock(&data->update_lock); 358 return count; 359 } 360 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 361 const char *buf, size_t count) 362 { 363 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 364 int nr = sensor_attr->index; 365 366 struct it87_data *data = dev_get_drvdata(dev); 367 unsigned long val = simple_strtoul(buf, NULL, 10); 368 369 mutex_lock(&data->update_lock); 370 data->in_max[nr] = IN_TO_REG(val); 371 it87_write_value(data, IT87_REG_VIN_MAX(nr), 372 data->in_max[nr]); 373 mutex_unlock(&data->update_lock); 374 return count; 375 } 376 377 #define show_in_offset(offset) \ 378 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 379 show_in, NULL, offset); 380 381 #define limit_in_offset(offset) \ 382 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 383 show_in_min, set_in_min, offset); \ 384 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 385 show_in_max, set_in_max, offset); 386 387 show_in_offset(0); 388 limit_in_offset(0); 389 show_in_offset(1); 390 limit_in_offset(1); 391 show_in_offset(2); 392 limit_in_offset(2); 393 show_in_offset(3); 394 limit_in_offset(3); 395 show_in_offset(4); 396 limit_in_offset(4); 397 show_in_offset(5); 398 limit_in_offset(5); 399 show_in_offset(6); 400 limit_in_offset(6); 401 show_in_offset(7); 402 limit_in_offset(7); 403 show_in_offset(8); 404 405 /* 3 temperatures */ 406 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 407 char *buf) 408 { 409 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 410 int nr = sensor_attr->index; 411 412 struct it87_data *data = it87_update_device(dev); 413 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 414 } 415 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 416 char *buf) 417 { 418 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 419 int nr = sensor_attr->index; 420 421 struct it87_data *data = it87_update_device(dev); 422 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); 423 } 424 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 425 char *buf) 426 { 427 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 428 int nr = sensor_attr->index; 429 430 struct it87_data *data = it87_update_device(dev); 431 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); 432 } 433 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 434 const char *buf, size_t count) 435 { 436 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 437 int nr = sensor_attr->index; 438 439 struct it87_data *data = dev_get_drvdata(dev); 440 int val = simple_strtol(buf, NULL, 10); 441 442 mutex_lock(&data->update_lock); 443 data->temp_high[nr] = TEMP_TO_REG(val); 444 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); 445 mutex_unlock(&data->update_lock); 446 return count; 447 } 448 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 449 const char *buf, size_t count) 450 { 451 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 452 int nr = sensor_attr->index; 453 454 struct it87_data *data = dev_get_drvdata(dev); 455 int val = simple_strtol(buf, NULL, 10); 456 457 mutex_lock(&data->update_lock); 458 data->temp_low[nr] = TEMP_TO_REG(val); 459 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); 460 mutex_unlock(&data->update_lock); 461 return count; 462 } 463 #define show_temp_offset(offset) \ 464 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 465 show_temp, NULL, offset - 1); \ 466 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 467 show_temp_max, set_temp_max, offset - 1); \ 468 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 469 show_temp_min, set_temp_min, offset - 1); 470 471 show_temp_offset(1); 472 show_temp_offset(2); 473 show_temp_offset(3); 474 475 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, 476 char *buf) 477 { 478 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 479 int nr = sensor_attr->index; 480 481 struct it87_data *data = it87_update_device(dev); 482 u8 reg = data->sensor; /* In case the value is updated while we use it */ 483 484 if (reg & (1 << nr)) 485 return sprintf(buf, "3\n"); /* thermal diode */ 486 if (reg & (8 << nr)) 487 return sprintf(buf, "4\n"); /* thermistor */ 488 return sprintf(buf, "0\n"); /* disabled */ 489 } 490 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, 491 const char *buf, size_t count) 492 { 493 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 494 int nr = sensor_attr->index; 495 496 struct it87_data *data = dev_get_drvdata(dev); 497 int val = simple_strtol(buf, NULL, 10); 498 499 mutex_lock(&data->update_lock); 500 501 data->sensor &= ~(1 << nr); 502 data->sensor &= ~(8 << nr); 503 if (val == 2) { /* backwards compatibility */ 504 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 " 505 "instead\n"); 506 val = 4; 507 } 508 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */ 509 if (val == 3) 510 data->sensor |= 1 << nr; 511 else if (val == 4) 512 data->sensor |= 8 << nr; 513 else if (val != 0) { 514 mutex_unlock(&data->update_lock); 515 return -EINVAL; 516 } 517 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor); 518 mutex_unlock(&data->update_lock); 519 return count; 520 } 521 #define show_sensor_offset(offset) \ 522 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ 523 show_sensor, set_sensor, offset - 1); 524 525 show_sensor_offset(1); 526 show_sensor_offset(2); 527 show_sensor_offset(3); 528 529 /* 3 Fans */ 530 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 531 char *buf) 532 { 533 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 534 int nr = sensor_attr->index; 535 536 struct it87_data *data = it87_update_device(dev); 537 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr], 538 DIV_FROM_REG(data->fan_div[nr]))); 539 } 540 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 541 char *buf) 542 { 543 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 544 int nr = sensor_attr->index; 545 546 struct it87_data *data = it87_update_device(dev); 547 return sprintf(buf,"%d\n", 548 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]))); 549 } 550 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 551 char *buf) 552 { 553 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 554 int nr = sensor_attr->index; 555 556 struct it87_data *data = it87_update_device(dev); 557 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 558 } 559 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr, 560 char *buf) 561 { 562 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 563 int nr = sensor_attr->index; 564 565 struct it87_data *data = it87_update_device(dev); 566 return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0); 567 } 568 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 569 char *buf) 570 { 571 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 572 int nr = sensor_attr->index; 573 574 struct it87_data *data = it87_update_device(dev); 575 return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]); 576 } 577 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr, 578 char *buf) 579 { 580 struct it87_data *data = it87_update_device(dev); 581 int index = (data->fan_ctl >> 4) & 0x07; 582 583 return sprintf(buf, "%u\n", pwm_freq[index]); 584 } 585 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 586 const char *buf, size_t count) 587 { 588 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 589 int nr = sensor_attr->index; 590 591 struct it87_data *data = dev_get_drvdata(dev); 592 int val = simple_strtol(buf, NULL, 10); 593 u8 reg; 594 595 mutex_lock(&data->update_lock); 596 reg = it87_read_value(data, IT87_REG_FAN_DIV); 597 switch (nr) { 598 case 0: data->fan_div[nr] = reg & 0x07; break; 599 case 1: data->fan_div[nr] = (reg >> 3) & 0x07; break; 600 case 2: data->fan_div[nr] = (reg & 0x40) ? 3 : 1; break; 601 } 602 603 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 604 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 605 mutex_unlock(&data->update_lock); 606 return count; 607 } 608 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 609 const char *buf, size_t count) 610 { 611 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 612 int nr = sensor_attr->index; 613 614 struct it87_data *data = dev_get_drvdata(dev); 615 unsigned long val = simple_strtoul(buf, NULL, 10); 616 int min; 617 u8 old; 618 619 mutex_lock(&data->update_lock); 620 old = it87_read_value(data, IT87_REG_FAN_DIV); 621 622 /* Save fan min limit */ 623 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 624 625 switch (nr) { 626 case 0: 627 case 1: 628 data->fan_div[nr] = DIV_TO_REG(val); 629 break; 630 case 2: 631 if (val < 8) 632 data->fan_div[nr] = 1; 633 else 634 data->fan_div[nr] = 3; 635 } 636 val = old & 0x80; 637 val |= (data->fan_div[0] & 0x07); 638 val |= (data->fan_div[1] & 0x07) << 3; 639 if (data->fan_div[2] == 3) 640 val |= 0x1 << 6; 641 it87_write_value(data, IT87_REG_FAN_DIV, val); 642 643 /* Restore fan min limit */ 644 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 645 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 646 647 mutex_unlock(&data->update_lock); 648 return count; 649 } 650 static ssize_t set_pwm_enable(struct device *dev, 651 struct device_attribute *attr, const char *buf, size_t count) 652 { 653 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 654 int nr = sensor_attr->index; 655 656 struct it87_data *data = dev_get_drvdata(dev); 657 int val = simple_strtol(buf, NULL, 10); 658 659 mutex_lock(&data->update_lock); 660 661 if (val == 0) { 662 int tmp; 663 /* make sure the fan is on when in on/off mode */ 664 tmp = it87_read_value(data, IT87_REG_FAN_CTL); 665 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr)); 666 /* set on/off mode */ 667 data->fan_main_ctrl &= ~(1 << nr); 668 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 669 } else if (val == 1) { 670 /* set SmartGuardian mode */ 671 data->fan_main_ctrl |= (1 << nr); 672 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 673 /* set saved pwm value, clear FAN_CTLX PWM mode bit */ 674 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); 675 } else { 676 mutex_unlock(&data->update_lock); 677 return -EINVAL; 678 } 679 680 mutex_unlock(&data->update_lock); 681 return count; 682 } 683 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 684 const char *buf, size_t count) 685 { 686 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 687 int nr = sensor_attr->index; 688 689 struct it87_data *data = dev_get_drvdata(dev); 690 int val = simple_strtol(buf, NULL, 10); 691 692 if (val < 0 || val > 255) 693 return -EINVAL; 694 695 mutex_lock(&data->update_lock); 696 data->manual_pwm_ctl[nr] = val; 697 if (data->fan_main_ctrl & (1 << nr)) 698 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); 699 mutex_unlock(&data->update_lock); 700 return count; 701 } 702 static ssize_t set_pwm_freq(struct device *dev, 703 struct device_attribute *attr, const char *buf, size_t count) 704 { 705 struct it87_data *data = dev_get_drvdata(dev); 706 unsigned long val = simple_strtoul(buf, NULL, 10); 707 int i; 708 709 /* Search for the nearest available frequency */ 710 for (i = 0; i < 7; i++) { 711 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2) 712 break; 713 } 714 715 mutex_lock(&data->update_lock); 716 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f; 717 data->fan_ctl |= i << 4; 718 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl); 719 mutex_unlock(&data->update_lock); 720 721 return count; 722 } 723 724 #define show_fan_offset(offset) \ 725 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 726 show_fan, NULL, offset - 1); \ 727 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 728 show_fan_min, set_fan_min, offset - 1); \ 729 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 730 show_fan_div, set_fan_div, offset - 1); 731 732 show_fan_offset(1); 733 show_fan_offset(2); 734 show_fan_offset(3); 735 736 #define show_pwm_offset(offset) \ 737 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 738 show_pwm_enable, set_pwm_enable, offset - 1); \ 739 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 740 show_pwm, set_pwm, offset - 1); \ 741 static DEVICE_ATTR(pwm##offset##_freq, \ 742 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \ 743 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); 744 745 show_pwm_offset(1); 746 show_pwm_offset(2); 747 show_pwm_offset(3); 748 749 /* A different set of callbacks for 16-bit fans */ 750 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr, 751 char *buf) 752 { 753 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 754 int nr = sensor_attr->index; 755 struct it87_data *data = it87_update_device(dev); 756 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr])); 757 } 758 759 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr, 760 char *buf) 761 { 762 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 763 int nr = sensor_attr->index; 764 struct it87_data *data = it87_update_device(dev); 765 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr])); 766 } 767 768 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr, 769 const char *buf, size_t count) 770 { 771 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 772 int nr = sensor_attr->index; 773 struct it87_data *data = dev_get_drvdata(dev); 774 int val = simple_strtol(buf, NULL, 10); 775 776 mutex_lock(&data->update_lock); 777 data->fan_min[nr] = FAN16_TO_REG(val); 778 it87_write_value(data, IT87_REG_FAN_MIN[nr], 779 data->fan_min[nr] & 0xff); 780 it87_write_value(data, IT87_REG_FANX_MIN[nr], 781 data->fan_min[nr] >> 8); 782 mutex_unlock(&data->update_lock); 783 return count; 784 } 785 786 /* We want to use the same sysfs file names as 8-bit fans, but we need 787 different variable names, so we have to use SENSOR_ATTR instead of 788 SENSOR_DEVICE_ATTR. */ 789 #define show_fan16_offset(offset) \ 790 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \ 791 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \ 792 show_fan16, NULL, offset - 1); \ 793 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \ 794 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 795 show_fan16_min, set_fan16_min, offset - 1) 796 797 show_fan16_offset(1); 798 show_fan16_offset(2); 799 show_fan16_offset(3); 800 show_fan16_offset(4); 801 show_fan16_offset(5); 802 803 /* Alarms */ 804 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 805 { 806 struct it87_data *data = it87_update_device(dev); 807 return sprintf(buf, "%u\n", data->alarms); 808 } 809 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 810 811 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 812 char *buf) 813 { 814 int bitnr = to_sensor_dev_attr(attr)->index; 815 struct it87_data *data = it87_update_device(dev); 816 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 817 } 818 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8); 819 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9); 820 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10); 821 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11); 822 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12); 823 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13); 824 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14); 825 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15); 826 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0); 827 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1); 828 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2); 829 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3); 830 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6); 831 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16); 832 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17); 833 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18); 834 835 static ssize_t 836 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf) 837 { 838 struct it87_data *data = dev_get_drvdata(dev); 839 return sprintf(buf, "%u\n", data->vrm); 840 } 841 static ssize_t 842 store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 843 { 844 struct it87_data *data = dev_get_drvdata(dev); 845 u32 val; 846 847 val = simple_strtoul(buf, NULL, 10); 848 data->vrm = val; 849 850 return count; 851 } 852 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 853 854 static ssize_t 855 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf) 856 { 857 struct it87_data *data = it87_update_device(dev); 858 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 859 } 860 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 861 862 static ssize_t show_name(struct device *dev, struct device_attribute 863 *devattr, char *buf) 864 { 865 struct it87_data *data = dev_get_drvdata(dev); 866 return sprintf(buf, "%s\n", data->name); 867 } 868 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 869 870 static struct attribute *it87_attributes[] = { 871 &sensor_dev_attr_in0_input.dev_attr.attr, 872 &sensor_dev_attr_in1_input.dev_attr.attr, 873 &sensor_dev_attr_in2_input.dev_attr.attr, 874 &sensor_dev_attr_in3_input.dev_attr.attr, 875 &sensor_dev_attr_in4_input.dev_attr.attr, 876 &sensor_dev_attr_in5_input.dev_attr.attr, 877 &sensor_dev_attr_in6_input.dev_attr.attr, 878 &sensor_dev_attr_in7_input.dev_attr.attr, 879 &sensor_dev_attr_in8_input.dev_attr.attr, 880 &sensor_dev_attr_in0_min.dev_attr.attr, 881 &sensor_dev_attr_in1_min.dev_attr.attr, 882 &sensor_dev_attr_in2_min.dev_attr.attr, 883 &sensor_dev_attr_in3_min.dev_attr.attr, 884 &sensor_dev_attr_in4_min.dev_attr.attr, 885 &sensor_dev_attr_in5_min.dev_attr.attr, 886 &sensor_dev_attr_in6_min.dev_attr.attr, 887 &sensor_dev_attr_in7_min.dev_attr.attr, 888 &sensor_dev_attr_in0_max.dev_attr.attr, 889 &sensor_dev_attr_in1_max.dev_attr.attr, 890 &sensor_dev_attr_in2_max.dev_attr.attr, 891 &sensor_dev_attr_in3_max.dev_attr.attr, 892 &sensor_dev_attr_in4_max.dev_attr.attr, 893 &sensor_dev_attr_in5_max.dev_attr.attr, 894 &sensor_dev_attr_in6_max.dev_attr.attr, 895 &sensor_dev_attr_in7_max.dev_attr.attr, 896 &sensor_dev_attr_in0_alarm.dev_attr.attr, 897 &sensor_dev_attr_in1_alarm.dev_attr.attr, 898 &sensor_dev_attr_in2_alarm.dev_attr.attr, 899 &sensor_dev_attr_in3_alarm.dev_attr.attr, 900 &sensor_dev_attr_in4_alarm.dev_attr.attr, 901 &sensor_dev_attr_in5_alarm.dev_attr.attr, 902 &sensor_dev_attr_in6_alarm.dev_attr.attr, 903 &sensor_dev_attr_in7_alarm.dev_attr.attr, 904 905 &sensor_dev_attr_temp1_input.dev_attr.attr, 906 &sensor_dev_attr_temp2_input.dev_attr.attr, 907 &sensor_dev_attr_temp3_input.dev_attr.attr, 908 &sensor_dev_attr_temp1_max.dev_attr.attr, 909 &sensor_dev_attr_temp2_max.dev_attr.attr, 910 &sensor_dev_attr_temp3_max.dev_attr.attr, 911 &sensor_dev_attr_temp1_min.dev_attr.attr, 912 &sensor_dev_attr_temp2_min.dev_attr.attr, 913 &sensor_dev_attr_temp3_min.dev_attr.attr, 914 &sensor_dev_attr_temp1_type.dev_attr.attr, 915 &sensor_dev_attr_temp2_type.dev_attr.attr, 916 &sensor_dev_attr_temp3_type.dev_attr.attr, 917 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 918 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 919 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 920 921 &dev_attr_alarms.attr, 922 &dev_attr_name.attr, 923 NULL 924 }; 925 926 static const struct attribute_group it87_group = { 927 .attrs = it87_attributes, 928 }; 929 930 static struct attribute *it87_attributes_opt[] = { 931 &sensor_dev_attr_fan1_input16.dev_attr.attr, 932 &sensor_dev_attr_fan1_min16.dev_attr.attr, 933 &sensor_dev_attr_fan2_input16.dev_attr.attr, 934 &sensor_dev_attr_fan2_min16.dev_attr.attr, 935 &sensor_dev_attr_fan3_input16.dev_attr.attr, 936 &sensor_dev_attr_fan3_min16.dev_attr.attr, 937 &sensor_dev_attr_fan4_input16.dev_attr.attr, 938 &sensor_dev_attr_fan4_min16.dev_attr.attr, 939 &sensor_dev_attr_fan5_input16.dev_attr.attr, 940 &sensor_dev_attr_fan5_min16.dev_attr.attr, 941 942 &sensor_dev_attr_fan1_input.dev_attr.attr, 943 &sensor_dev_attr_fan1_min.dev_attr.attr, 944 &sensor_dev_attr_fan1_div.dev_attr.attr, 945 &sensor_dev_attr_fan2_input.dev_attr.attr, 946 &sensor_dev_attr_fan2_min.dev_attr.attr, 947 &sensor_dev_attr_fan2_div.dev_attr.attr, 948 &sensor_dev_attr_fan3_input.dev_attr.attr, 949 &sensor_dev_attr_fan3_min.dev_attr.attr, 950 &sensor_dev_attr_fan3_div.dev_attr.attr, 951 952 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 953 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 954 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 955 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 956 &sensor_dev_attr_fan5_alarm.dev_attr.attr, 957 958 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 959 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 960 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 961 &sensor_dev_attr_pwm1.dev_attr.attr, 962 &sensor_dev_attr_pwm2.dev_attr.attr, 963 &sensor_dev_attr_pwm3.dev_attr.attr, 964 &dev_attr_pwm1_freq.attr, 965 &dev_attr_pwm2_freq.attr, 966 &dev_attr_pwm3_freq.attr, 967 968 &dev_attr_vrm.attr, 969 &dev_attr_cpu0_vid.attr, 970 NULL 971 }; 972 973 static const struct attribute_group it87_group_opt = { 974 .attrs = it87_attributes_opt, 975 }; 976 977 /* SuperIO detection - will change isa_address if a chip is found */ 978 static int __init it87_find(unsigned short *address, 979 struct it87_sio_data *sio_data) 980 { 981 int err = -ENODEV; 982 u16 chip_type; 983 const char *board_vendor, *board_name; 984 985 superio_enter(); 986 chip_type = force_id ? force_id : superio_inw(DEVID); 987 988 switch (chip_type) { 989 case IT8705F_DEVID: 990 sio_data->type = it87; 991 break; 992 case IT8712F_DEVID: 993 sio_data->type = it8712; 994 break; 995 case IT8716F_DEVID: 996 case IT8726F_DEVID: 997 sio_data->type = it8716; 998 break; 999 case IT8718F_DEVID: 1000 sio_data->type = it8718; 1001 break; 1002 case IT8720F_DEVID: 1003 sio_data->type = it8720; 1004 break; 1005 case 0xffff: /* No device at all */ 1006 goto exit; 1007 default: 1008 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n", 1009 chip_type); 1010 goto exit; 1011 } 1012 1013 superio_select(PME); 1014 if (!(superio_inb(IT87_ACT_REG) & 0x01)) { 1015 pr_info("it87: Device not activated, skipping\n"); 1016 goto exit; 1017 } 1018 1019 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); 1020 if (*address == 0) { 1021 pr_info("it87: Base address not set, skipping\n"); 1022 goto exit; 1023 } 1024 1025 err = 0; 1026 sio_data->revision = superio_inb(DEVREV) & 0x0f; 1027 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n", 1028 chip_type, *address, sio_data->revision); 1029 1030 /* Read GPIO config and VID value from LDN 7 (GPIO) */ 1031 if (chip_type != IT8705F_DEVID) { 1032 int reg; 1033 1034 superio_select(GPIO); 1035 if ((chip_type == it8718) || 1036 (chip_type == it8720)) 1037 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG); 1038 1039 reg = superio_inb(IT87_SIO_PINX2_REG); 1040 if (reg & (1 << 0)) 1041 pr_info("it87: in3 is VCC (+5V)\n"); 1042 if (reg & (1 << 1)) 1043 pr_info("it87: in7 is VCCH (+5V Stand-By)\n"); 1044 } 1045 1046 /* Disable specific features based on DMI strings */ 1047 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR); 1048 board_name = dmi_get_system_info(DMI_BOARD_NAME); 1049 if (board_vendor && board_name) { 1050 if (strcmp(board_vendor, "nVIDIA") == 0 1051 && strcmp(board_name, "FN68PT") == 0) { 1052 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not 1053 connected to a fan, but to something else. One user 1054 has reported instant system power-off when changing 1055 the PWM2 duty cycle, so we disable it. 1056 I use the board name string as the trigger in case 1057 the same board is ever used in other systems. */ 1058 pr_info("it87: Disabling pwm2 due to " 1059 "hardware constraints\n"); 1060 sio_data->skip_pwm = (1 << 1); 1061 } 1062 } 1063 1064 exit: 1065 superio_exit(); 1066 return err; 1067 } 1068 1069 static int __devinit it87_probe(struct platform_device *pdev) 1070 { 1071 struct it87_data *data; 1072 struct resource *res; 1073 struct device *dev = &pdev->dev; 1074 struct it87_sio_data *sio_data = dev->platform_data; 1075 int err = 0; 1076 int enable_pwm_interface; 1077 static const char *names[] = { 1078 "it87", 1079 "it8712", 1080 "it8716", 1081 "it8718", 1082 "it8720", 1083 }; 1084 1085 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1086 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) { 1087 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", 1088 (unsigned long)res->start, 1089 (unsigned long)(res->start + IT87_EC_EXTENT - 1)); 1090 err = -EBUSY; 1091 goto ERROR0; 1092 } 1093 1094 if (!(data = kzalloc(sizeof(struct it87_data), GFP_KERNEL))) { 1095 err = -ENOMEM; 1096 goto ERROR1; 1097 } 1098 1099 data->addr = res->start; 1100 data->type = sio_data->type; 1101 data->revision = sio_data->revision; 1102 data->name = names[sio_data->type]; 1103 1104 /* Now, we do the remaining detection. */ 1105 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80) 1106 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) { 1107 err = -ENODEV; 1108 goto ERROR2; 1109 } 1110 1111 platform_set_drvdata(pdev, data); 1112 1113 mutex_init(&data->update_lock); 1114 1115 /* Check PWM configuration */ 1116 enable_pwm_interface = it87_check_pwm(dev); 1117 1118 /* Initialize the IT87 chip */ 1119 it87_init_device(pdev); 1120 1121 /* Register sysfs hooks */ 1122 if ((err = sysfs_create_group(&dev->kobj, &it87_group))) 1123 goto ERROR2; 1124 1125 /* Do not create fan files for disabled fans */ 1126 if (has_16bit_fans(data)) { 1127 /* 16-bit tachometers */ 1128 if (data->has_fan & (1 << 0)) { 1129 if ((err = device_create_file(dev, 1130 &sensor_dev_attr_fan1_input16.dev_attr)) 1131 || (err = device_create_file(dev, 1132 &sensor_dev_attr_fan1_min16.dev_attr)) 1133 || (err = device_create_file(dev, 1134 &sensor_dev_attr_fan1_alarm.dev_attr))) 1135 goto ERROR4; 1136 } 1137 if (data->has_fan & (1 << 1)) { 1138 if ((err = device_create_file(dev, 1139 &sensor_dev_attr_fan2_input16.dev_attr)) 1140 || (err = device_create_file(dev, 1141 &sensor_dev_attr_fan2_min16.dev_attr)) 1142 || (err = device_create_file(dev, 1143 &sensor_dev_attr_fan2_alarm.dev_attr))) 1144 goto ERROR4; 1145 } 1146 if (data->has_fan & (1 << 2)) { 1147 if ((err = device_create_file(dev, 1148 &sensor_dev_attr_fan3_input16.dev_attr)) 1149 || (err = device_create_file(dev, 1150 &sensor_dev_attr_fan3_min16.dev_attr)) 1151 || (err = device_create_file(dev, 1152 &sensor_dev_attr_fan3_alarm.dev_attr))) 1153 goto ERROR4; 1154 } 1155 if (data->has_fan & (1 << 3)) { 1156 if ((err = device_create_file(dev, 1157 &sensor_dev_attr_fan4_input16.dev_attr)) 1158 || (err = device_create_file(dev, 1159 &sensor_dev_attr_fan4_min16.dev_attr)) 1160 || (err = device_create_file(dev, 1161 &sensor_dev_attr_fan4_alarm.dev_attr))) 1162 goto ERROR4; 1163 } 1164 if (data->has_fan & (1 << 4)) { 1165 if ((err = device_create_file(dev, 1166 &sensor_dev_attr_fan5_input16.dev_attr)) 1167 || (err = device_create_file(dev, 1168 &sensor_dev_attr_fan5_min16.dev_attr)) 1169 || (err = device_create_file(dev, 1170 &sensor_dev_attr_fan5_alarm.dev_attr))) 1171 goto ERROR4; 1172 } 1173 } else { 1174 /* 8-bit tachometers with clock divider */ 1175 if (data->has_fan & (1 << 0)) { 1176 if ((err = device_create_file(dev, 1177 &sensor_dev_attr_fan1_input.dev_attr)) 1178 || (err = device_create_file(dev, 1179 &sensor_dev_attr_fan1_min.dev_attr)) 1180 || (err = device_create_file(dev, 1181 &sensor_dev_attr_fan1_div.dev_attr)) 1182 || (err = device_create_file(dev, 1183 &sensor_dev_attr_fan1_alarm.dev_attr))) 1184 goto ERROR4; 1185 } 1186 if (data->has_fan & (1 << 1)) { 1187 if ((err = device_create_file(dev, 1188 &sensor_dev_attr_fan2_input.dev_attr)) 1189 || (err = device_create_file(dev, 1190 &sensor_dev_attr_fan2_min.dev_attr)) 1191 || (err = device_create_file(dev, 1192 &sensor_dev_attr_fan2_div.dev_attr)) 1193 || (err = device_create_file(dev, 1194 &sensor_dev_attr_fan2_alarm.dev_attr))) 1195 goto ERROR4; 1196 } 1197 if (data->has_fan & (1 << 2)) { 1198 if ((err = device_create_file(dev, 1199 &sensor_dev_attr_fan3_input.dev_attr)) 1200 || (err = device_create_file(dev, 1201 &sensor_dev_attr_fan3_min.dev_attr)) 1202 || (err = device_create_file(dev, 1203 &sensor_dev_attr_fan3_div.dev_attr)) 1204 || (err = device_create_file(dev, 1205 &sensor_dev_attr_fan3_alarm.dev_attr))) 1206 goto ERROR4; 1207 } 1208 } 1209 1210 if (enable_pwm_interface) { 1211 if (!(sio_data->skip_pwm & (1 << 0))) { 1212 if ((err = device_create_file(dev, 1213 &sensor_dev_attr_pwm1_enable.dev_attr)) 1214 || (err = device_create_file(dev, 1215 &sensor_dev_attr_pwm1.dev_attr)) 1216 || (err = device_create_file(dev, 1217 &dev_attr_pwm1_freq))) 1218 goto ERROR4; 1219 } 1220 if (!(sio_data->skip_pwm & (1 << 1))) { 1221 if ((err = device_create_file(dev, 1222 &sensor_dev_attr_pwm2_enable.dev_attr)) 1223 || (err = device_create_file(dev, 1224 &sensor_dev_attr_pwm2.dev_attr)) 1225 || (err = device_create_file(dev, 1226 &dev_attr_pwm2_freq))) 1227 goto ERROR4; 1228 } 1229 if (!(sio_data->skip_pwm & (1 << 2))) { 1230 if ((err = device_create_file(dev, 1231 &sensor_dev_attr_pwm3_enable.dev_attr)) 1232 || (err = device_create_file(dev, 1233 &sensor_dev_attr_pwm3.dev_attr)) 1234 || (err = device_create_file(dev, 1235 &dev_attr_pwm3_freq))) 1236 goto ERROR4; 1237 } 1238 } 1239 1240 if (data->type == it8712 || data->type == it8716 1241 || data->type == it8718 || data->type == it8720) { 1242 data->vrm = vid_which_vrm(); 1243 /* VID reading from Super-I/O config space if available */ 1244 data->vid = sio_data->vid_value; 1245 if ((err = device_create_file(dev, 1246 &dev_attr_vrm)) 1247 || (err = device_create_file(dev, 1248 &dev_attr_cpu0_vid))) 1249 goto ERROR4; 1250 } 1251 1252 data->hwmon_dev = hwmon_device_register(dev); 1253 if (IS_ERR(data->hwmon_dev)) { 1254 err = PTR_ERR(data->hwmon_dev); 1255 goto ERROR4; 1256 } 1257 1258 return 0; 1259 1260 ERROR4: 1261 sysfs_remove_group(&dev->kobj, &it87_group); 1262 sysfs_remove_group(&dev->kobj, &it87_group_opt); 1263 ERROR2: 1264 platform_set_drvdata(pdev, NULL); 1265 kfree(data); 1266 ERROR1: 1267 release_region(res->start, IT87_EC_EXTENT); 1268 ERROR0: 1269 return err; 1270 } 1271 1272 static int __devexit it87_remove(struct platform_device *pdev) 1273 { 1274 struct it87_data *data = platform_get_drvdata(pdev); 1275 1276 hwmon_device_unregister(data->hwmon_dev); 1277 sysfs_remove_group(&pdev->dev.kobj, &it87_group); 1278 sysfs_remove_group(&pdev->dev.kobj, &it87_group_opt); 1279 1280 release_region(data->addr, IT87_EC_EXTENT); 1281 platform_set_drvdata(pdev, NULL); 1282 kfree(data); 1283 1284 return 0; 1285 } 1286 1287 /* Must be called with data->update_lock held, except during initialization. 1288 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1289 would slow down the IT87 access and should not be necessary. */ 1290 static int it87_read_value(struct it87_data *data, u8 reg) 1291 { 1292 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1293 return inb_p(data->addr + IT87_DATA_REG_OFFSET); 1294 } 1295 1296 /* Must be called with data->update_lock held, except during initialization. 1297 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1298 would slow down the IT87 access and should not be necessary. */ 1299 static void it87_write_value(struct it87_data *data, u8 reg, u8 value) 1300 { 1301 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1302 outb_p(value, data->addr + IT87_DATA_REG_OFFSET); 1303 } 1304 1305 /* Return 1 if and only if the PWM interface is safe to use */ 1306 static int __devinit it87_check_pwm(struct device *dev) 1307 { 1308 struct it87_data *data = dev_get_drvdata(dev); 1309 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off 1310 * and polarity set to active low is sign that this is the case so we 1311 * disable pwm control to protect the user. */ 1312 int tmp = it87_read_value(data, IT87_REG_FAN_CTL); 1313 if ((tmp & 0x87) == 0) { 1314 if (fix_pwm_polarity) { 1315 /* The user asks us to attempt a chip reconfiguration. 1316 * This means switching to active high polarity and 1317 * inverting all fan speed values. */ 1318 int i; 1319 u8 pwm[3]; 1320 1321 for (i = 0; i < 3; i++) 1322 pwm[i] = it87_read_value(data, 1323 IT87_REG_PWM(i)); 1324 1325 /* If any fan is in automatic pwm mode, the polarity 1326 * might be correct, as suspicious as it seems, so we 1327 * better don't change anything (but still disable the 1328 * PWM interface). */ 1329 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) { 1330 dev_info(dev, "Reconfiguring PWM to " 1331 "active high polarity\n"); 1332 it87_write_value(data, IT87_REG_FAN_CTL, 1333 tmp | 0x87); 1334 for (i = 0; i < 3; i++) 1335 it87_write_value(data, 1336 IT87_REG_PWM(i), 1337 0x7f & ~pwm[i]); 1338 return 1; 1339 } 1340 1341 dev_info(dev, "PWM configuration is " 1342 "too broken to be fixed\n"); 1343 } 1344 1345 dev_info(dev, "Detected broken BIOS " 1346 "defaults, disabling PWM interface\n"); 1347 return 0; 1348 } else if (fix_pwm_polarity) { 1349 dev_info(dev, "PWM configuration looks " 1350 "sane, won't touch\n"); 1351 } 1352 1353 return 1; 1354 } 1355 1356 /* Called when we have found a new IT87. */ 1357 static void __devinit it87_init_device(struct platform_device *pdev) 1358 { 1359 struct it87_data *data = platform_get_drvdata(pdev); 1360 int tmp, i; 1361 1362 /* initialize to sane defaults: 1363 * - if the chip is in manual pwm mode, this will be overwritten with 1364 * the actual settings on the chip (so in this case, initialization 1365 * is not needed) 1366 * - if in automatic or on/off mode, we could switch to manual mode, 1367 * read the registers and set manual_pwm_ctl accordingly, but currently 1368 * this is not implemented, so we initialize to something sane */ 1369 for (i = 0; i < 3; i++) { 1370 data->manual_pwm_ctl[i] = 0xff; 1371 } 1372 1373 /* Some chips seem to have default value 0xff for all limit 1374 * registers. For low voltage limits it makes no sense and triggers 1375 * alarms, so change to 0 instead. For high temperature limits, it 1376 * means -1 degree C, which surprisingly doesn't trigger an alarm, 1377 * but is still confusing, so change to 127 degrees C. */ 1378 for (i = 0; i < 8; i++) { 1379 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i)); 1380 if (tmp == 0xff) 1381 it87_write_value(data, IT87_REG_VIN_MIN(i), 0); 1382 } 1383 for (i = 0; i < 3; i++) { 1384 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1385 if (tmp == 0xff) 1386 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127); 1387 } 1388 1389 /* Check if temperature channels are reset manually or by some reason */ 1390 tmp = it87_read_value(data, IT87_REG_TEMP_ENABLE); 1391 if ((tmp & 0x3f) == 0) { 1392 /* Temp1,Temp3=thermistor; Temp2=thermal diode */ 1393 tmp = (tmp & 0xc0) | 0x2a; 1394 it87_write_value(data, IT87_REG_TEMP_ENABLE, tmp); 1395 } 1396 data->sensor = tmp; 1397 1398 /* Check if voltage monitors are reset manually or by some reason */ 1399 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE); 1400 if ((tmp & 0xff) == 0) { 1401 /* Enable all voltage monitors */ 1402 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff); 1403 } 1404 1405 /* Check if tachometers are reset manually or by some reason */ 1406 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL); 1407 if ((data->fan_main_ctrl & 0x70) == 0) { 1408 /* Enable all fan tachometers */ 1409 data->fan_main_ctrl |= 0x70; 1410 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 1411 } 1412 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07; 1413 1414 /* Set tachometers to 16-bit mode if needed */ 1415 if (has_16bit_fans(data)) { 1416 tmp = it87_read_value(data, IT87_REG_FAN_16BIT); 1417 if (~tmp & 0x07 & data->has_fan) { 1418 dev_dbg(&pdev->dev, 1419 "Setting fan1-3 to 16-bit mode\n"); 1420 it87_write_value(data, IT87_REG_FAN_16BIT, 1421 tmp | 0x07); 1422 } 1423 /* IT8705F only supports three fans. */ 1424 if (data->type != it87) { 1425 if (tmp & (1 << 4)) 1426 data->has_fan |= (1 << 3); /* fan4 enabled */ 1427 if (tmp & (1 << 5)) 1428 data->has_fan |= (1 << 4); /* fan5 enabled */ 1429 } 1430 } 1431 1432 /* Set current fan mode registers and the default settings for the 1433 * other mode registers */ 1434 for (i = 0; i < 3; i++) { 1435 if (data->fan_main_ctrl & (1 << i)) { 1436 /* pwm mode */ 1437 tmp = it87_read_value(data, IT87_REG_PWM(i)); 1438 if (tmp & 0x80) { 1439 /* automatic pwm - not yet implemented, but 1440 * leave the settings made by the BIOS alone 1441 * until a change is requested via the sysfs 1442 * interface */ 1443 } else { 1444 /* manual pwm */ 1445 data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp); 1446 } 1447 } 1448 } 1449 1450 /* Start monitoring */ 1451 it87_write_value(data, IT87_REG_CONFIG, 1452 (it87_read_value(data, IT87_REG_CONFIG) & 0x36) 1453 | (update_vbat ? 0x41 : 0x01)); 1454 } 1455 1456 static struct it87_data *it87_update_device(struct device *dev) 1457 { 1458 struct it87_data *data = dev_get_drvdata(dev); 1459 int i; 1460 1461 mutex_lock(&data->update_lock); 1462 1463 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 1464 || !data->valid) { 1465 1466 if (update_vbat) { 1467 /* Cleared after each update, so reenable. Value 1468 returned by this read will be previous value */ 1469 it87_write_value(data, IT87_REG_CONFIG, 1470 it87_read_value(data, IT87_REG_CONFIG) | 0x40); 1471 } 1472 for (i = 0; i <= 7; i++) { 1473 data->in[i] = 1474 it87_read_value(data, IT87_REG_VIN(i)); 1475 data->in_min[i] = 1476 it87_read_value(data, IT87_REG_VIN_MIN(i)); 1477 data->in_max[i] = 1478 it87_read_value(data, IT87_REG_VIN_MAX(i)); 1479 } 1480 /* in8 (battery) has no limit registers */ 1481 data->in[8] = 1482 it87_read_value(data, IT87_REG_VIN(8)); 1483 1484 for (i = 0; i < 5; i++) { 1485 /* Skip disabled fans */ 1486 if (!(data->has_fan & (1 << i))) 1487 continue; 1488 1489 data->fan_min[i] = 1490 it87_read_value(data, IT87_REG_FAN_MIN[i]); 1491 data->fan[i] = it87_read_value(data, 1492 IT87_REG_FAN[i]); 1493 /* Add high byte if in 16-bit mode */ 1494 if (has_16bit_fans(data)) { 1495 data->fan[i] |= it87_read_value(data, 1496 IT87_REG_FANX[i]) << 8; 1497 data->fan_min[i] |= it87_read_value(data, 1498 IT87_REG_FANX_MIN[i]) << 8; 1499 } 1500 } 1501 for (i = 0; i < 3; i++) { 1502 data->temp[i] = 1503 it87_read_value(data, IT87_REG_TEMP(i)); 1504 data->temp_high[i] = 1505 it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1506 data->temp_low[i] = 1507 it87_read_value(data, IT87_REG_TEMP_LOW(i)); 1508 } 1509 1510 /* Newer chips don't have clock dividers */ 1511 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) { 1512 i = it87_read_value(data, IT87_REG_FAN_DIV); 1513 data->fan_div[0] = i & 0x07; 1514 data->fan_div[1] = (i >> 3) & 0x07; 1515 data->fan_div[2] = (i & 0x40) ? 3 : 1; 1516 } 1517 1518 data->alarms = 1519 it87_read_value(data, IT87_REG_ALARM1) | 1520 (it87_read_value(data, IT87_REG_ALARM2) << 8) | 1521 (it87_read_value(data, IT87_REG_ALARM3) << 16); 1522 data->fan_main_ctrl = it87_read_value(data, 1523 IT87_REG_FAN_MAIN_CTRL); 1524 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL); 1525 1526 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE); 1527 /* The 8705 does not have VID capability. 1528 The 8718 and the 8720 don't use IT87_REG_VID for the 1529 same purpose. */ 1530 if (data->type == it8712 || data->type == it8716) { 1531 data->vid = it87_read_value(data, IT87_REG_VID); 1532 /* The older IT8712F revisions had only 5 VID pins, 1533 but we assume it is always safe to read 6 bits. */ 1534 data->vid &= 0x3f; 1535 } 1536 data->last_updated = jiffies; 1537 data->valid = 1; 1538 } 1539 1540 mutex_unlock(&data->update_lock); 1541 1542 return data; 1543 } 1544 1545 static int __init it87_device_add(unsigned short address, 1546 const struct it87_sio_data *sio_data) 1547 { 1548 struct resource res = { 1549 .start = address + IT87_EC_OFFSET, 1550 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1, 1551 .name = DRVNAME, 1552 .flags = IORESOURCE_IO, 1553 }; 1554 int err; 1555 1556 err = acpi_check_resource_conflict(&res); 1557 if (err) 1558 goto exit; 1559 1560 pdev = platform_device_alloc(DRVNAME, address); 1561 if (!pdev) { 1562 err = -ENOMEM; 1563 printk(KERN_ERR DRVNAME ": Device allocation failed\n"); 1564 goto exit; 1565 } 1566 1567 err = platform_device_add_resources(pdev, &res, 1); 1568 if (err) { 1569 printk(KERN_ERR DRVNAME ": Device resource addition failed " 1570 "(%d)\n", err); 1571 goto exit_device_put; 1572 } 1573 1574 err = platform_device_add_data(pdev, sio_data, 1575 sizeof(struct it87_sio_data)); 1576 if (err) { 1577 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n"); 1578 goto exit_device_put; 1579 } 1580 1581 err = platform_device_add(pdev); 1582 if (err) { 1583 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", 1584 err); 1585 goto exit_device_put; 1586 } 1587 1588 return 0; 1589 1590 exit_device_put: 1591 platform_device_put(pdev); 1592 exit: 1593 return err; 1594 } 1595 1596 static int __init sm_it87_init(void) 1597 { 1598 int err; 1599 unsigned short isa_address=0; 1600 struct it87_sio_data sio_data; 1601 1602 memset(&sio_data, 0, sizeof(struct it87_sio_data)); 1603 err = it87_find(&isa_address, &sio_data); 1604 if (err) 1605 return err; 1606 err = platform_driver_register(&it87_driver); 1607 if (err) 1608 return err; 1609 1610 err = it87_device_add(isa_address, &sio_data); 1611 if (err){ 1612 platform_driver_unregister(&it87_driver); 1613 return err; 1614 } 1615 1616 return 0; 1617 } 1618 1619 static void __exit sm_it87_exit(void) 1620 { 1621 platform_device_unregister(pdev); 1622 platform_driver_unregister(&it87_driver); 1623 } 1624 1625 1626 MODULE_AUTHOR("Chris Gauthron, " 1627 "Jean Delvare <khali@linux-fr.org>"); 1628 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8720F/8726F, SiS950 driver"); 1629 module_param(update_vbat, bool, 0); 1630 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); 1631 module_param(fix_pwm_polarity, bool, 0); 1632 MODULE_PARM_DESC(fix_pwm_polarity, "Force PWM polarity to active high (DANGEROUS)"); 1633 MODULE_LICENSE("GPL"); 1634 1635 module_init(sm_it87_init); 1636 module_exit(sm_it87_exit); 1637