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_GPIO3_REG 0x27 128 #define IT87_SIO_GPIO5_REG 0x29 129 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */ 130 #define IT87_SIO_VID_REG 0xfc /* VID value */ 131 132 /* Update battery voltage after every reading if true */ 133 static int update_vbat; 134 135 /* Not all BIOSes properly configure the PWM registers */ 136 static int fix_pwm_polarity; 137 138 /* Many IT87 constants specified below */ 139 140 /* Length of ISA address segment */ 141 #define IT87_EXTENT 8 142 143 /* Length of ISA address segment for Environmental Controller */ 144 #define IT87_EC_EXTENT 2 145 146 /* Offset of EC registers from ISA base address */ 147 #define IT87_EC_OFFSET 5 148 149 /* Where are the ISA address/data registers relative to the EC base address */ 150 #define IT87_ADDR_REG_OFFSET 0 151 #define IT87_DATA_REG_OFFSET 1 152 153 /*----- The IT87 registers -----*/ 154 155 #define IT87_REG_CONFIG 0x00 156 157 #define IT87_REG_ALARM1 0x01 158 #define IT87_REG_ALARM2 0x02 159 #define IT87_REG_ALARM3 0x03 160 161 /* The IT8718F and IT8720F have the VID value in a different register, in 162 Super-I/O configuration space. */ 163 #define IT87_REG_VID 0x0a 164 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b 165 for fan divisors. Later IT8712F revisions must use 16-bit tachometer 166 mode. */ 167 #define IT87_REG_FAN_DIV 0x0b 168 #define IT87_REG_FAN_16BIT 0x0c 169 170 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */ 171 172 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 }; 173 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 }; 174 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 }; 175 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 }; 176 #define IT87_REG_FAN_MAIN_CTRL 0x13 177 #define IT87_REG_FAN_CTL 0x14 178 #define IT87_REG_PWM(nr) (0x15 + (nr)) 179 180 #define IT87_REG_VIN(nr) (0x20 + (nr)) 181 #define IT87_REG_TEMP(nr) (0x29 + (nr)) 182 183 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2) 184 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2) 185 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2) 186 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2) 187 188 #define IT87_REG_VIN_ENABLE 0x50 189 #define IT87_REG_TEMP_ENABLE 0x51 190 191 #define IT87_REG_CHIPID 0x58 192 193 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255)) 194 #define IN_FROM_REG(val) ((val) * 16) 195 196 static inline u8 FAN_TO_REG(long rpm, int div) 197 { 198 if (rpm == 0) 199 return 255; 200 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 201 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 202 254); 203 } 204 205 static inline u16 FAN16_TO_REG(long rpm) 206 { 207 if (rpm == 0) 208 return 0xffff; 209 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe); 210 } 211 212 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div))) 213 /* The divider is fixed to 2 in 16-bit mode */ 214 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2)) 215 216 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\ 217 ((val)+500)/1000),-128,127)) 218 #define TEMP_FROM_REG(val) ((val) * 1000) 219 220 #define PWM_TO_REG(val) ((val) >> 1) 221 #define PWM_FROM_REG(val) (((val)&0x7f) << 1) 222 223 static int DIV_TO_REG(int val) 224 { 225 int answer = 0; 226 while (answer < 7 && (val >>= 1)) 227 answer++; 228 return answer; 229 } 230 #define DIV_FROM_REG(val) (1 << (val)) 231 232 static const unsigned int pwm_freq[8] = { 233 48000000 / 128, 234 24000000 / 128, 235 12000000 / 128, 236 8000000 / 128, 237 6000000 / 128, 238 3000000 / 128, 239 1500000 / 128, 240 750000 / 128, 241 }; 242 243 244 struct it87_sio_data { 245 enum chips type; 246 /* Values read from Super-I/O config space */ 247 u8 revision; 248 u8 vid_value; 249 /* Features skipped based on config or DMI */ 250 u8 skip_vid; 251 u8 skip_fan; 252 u8 skip_pwm; 253 }; 254 255 /* For each registered chip, we need to keep some data in memory. 256 The structure is dynamically allocated. */ 257 struct it87_data { 258 struct device *hwmon_dev; 259 enum chips type; 260 u8 revision; 261 262 unsigned short addr; 263 const char *name; 264 struct mutex update_lock; 265 char valid; /* !=0 if following fields are valid */ 266 unsigned long last_updated; /* In jiffies */ 267 268 u8 in[9]; /* Register value */ 269 u8 in_max[8]; /* Register value */ 270 u8 in_min[8]; /* Register value */ 271 u8 has_fan; /* Bitfield, fans enabled */ 272 u16 fan[5]; /* Register values, possibly combined */ 273 u16 fan_min[5]; /* Register values, possibly combined */ 274 s8 temp[3]; /* Register value */ 275 s8 temp_high[3]; /* Register value */ 276 s8 temp_low[3]; /* Register value */ 277 u8 sensor; /* Register value */ 278 u8 fan_div[3]; /* Register encoding, shifted right */ 279 u8 vid; /* Register encoding, combined */ 280 u8 vrm; 281 u32 alarms; /* Register encoding, combined */ 282 u8 fan_main_ctrl; /* Register value */ 283 u8 fan_ctl; /* Register value */ 284 u8 manual_pwm_ctl[3]; /* manual PWM value set by user */ 285 }; 286 287 static inline int has_16bit_fans(const struct it87_data *data) 288 { 289 /* IT8705F Datasheet 0.4.1, 3h == Version G. 290 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J. 291 These are the first revisions with 16bit tachometer support. */ 292 return (data->type == it87 && data->revision >= 0x03) 293 || (data->type == it8712 && data->revision >= 0x08) 294 || data->type == it8716 295 || data->type == it8718 296 || data->type == it8720; 297 } 298 299 static int it87_probe(struct platform_device *pdev); 300 static int __devexit it87_remove(struct platform_device *pdev); 301 302 static int it87_read_value(struct it87_data *data, u8 reg); 303 static void it87_write_value(struct it87_data *data, u8 reg, u8 value); 304 static struct it87_data *it87_update_device(struct device *dev); 305 static int it87_check_pwm(struct device *dev); 306 static void it87_init_device(struct platform_device *pdev); 307 308 309 static struct platform_driver it87_driver = { 310 .driver = { 311 .owner = THIS_MODULE, 312 .name = DRVNAME, 313 }, 314 .probe = it87_probe, 315 .remove = __devexit_p(it87_remove), 316 }; 317 318 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 319 char *buf) 320 { 321 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 322 int nr = sensor_attr->index; 323 324 struct it87_data *data = it87_update_device(dev); 325 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); 326 } 327 328 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 329 char *buf) 330 { 331 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 332 int nr = sensor_attr->index; 333 334 struct it87_data *data = it87_update_device(dev); 335 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); 336 } 337 338 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 339 char *buf) 340 { 341 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 342 int nr = sensor_attr->index; 343 344 struct it87_data *data = it87_update_device(dev); 345 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); 346 } 347 348 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 349 const char *buf, size_t count) 350 { 351 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 352 int nr = sensor_attr->index; 353 354 struct it87_data *data = dev_get_drvdata(dev); 355 unsigned long val = simple_strtoul(buf, NULL, 10); 356 357 mutex_lock(&data->update_lock); 358 data->in_min[nr] = IN_TO_REG(val); 359 it87_write_value(data, IT87_REG_VIN_MIN(nr), 360 data->in_min[nr]); 361 mutex_unlock(&data->update_lock); 362 return count; 363 } 364 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 365 const char *buf, size_t count) 366 { 367 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 368 int nr = sensor_attr->index; 369 370 struct it87_data *data = dev_get_drvdata(dev); 371 unsigned long val = simple_strtoul(buf, NULL, 10); 372 373 mutex_lock(&data->update_lock); 374 data->in_max[nr] = IN_TO_REG(val); 375 it87_write_value(data, IT87_REG_VIN_MAX(nr), 376 data->in_max[nr]); 377 mutex_unlock(&data->update_lock); 378 return count; 379 } 380 381 #define show_in_offset(offset) \ 382 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 383 show_in, NULL, offset); 384 385 #define limit_in_offset(offset) \ 386 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 387 show_in_min, set_in_min, offset); \ 388 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 389 show_in_max, set_in_max, offset); 390 391 show_in_offset(0); 392 limit_in_offset(0); 393 show_in_offset(1); 394 limit_in_offset(1); 395 show_in_offset(2); 396 limit_in_offset(2); 397 show_in_offset(3); 398 limit_in_offset(3); 399 show_in_offset(4); 400 limit_in_offset(4); 401 show_in_offset(5); 402 limit_in_offset(5); 403 show_in_offset(6); 404 limit_in_offset(6); 405 show_in_offset(7); 406 limit_in_offset(7); 407 show_in_offset(8); 408 409 /* 3 temperatures */ 410 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 411 char *buf) 412 { 413 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 414 int nr = sensor_attr->index; 415 416 struct it87_data *data = it87_update_device(dev); 417 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 418 } 419 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 420 char *buf) 421 { 422 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 423 int nr = sensor_attr->index; 424 425 struct it87_data *data = it87_update_device(dev); 426 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); 427 } 428 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 429 char *buf) 430 { 431 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 432 int nr = sensor_attr->index; 433 434 struct it87_data *data = it87_update_device(dev); 435 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); 436 } 437 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 438 const char *buf, size_t count) 439 { 440 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 441 int nr = sensor_attr->index; 442 443 struct it87_data *data = dev_get_drvdata(dev); 444 int val = simple_strtol(buf, NULL, 10); 445 446 mutex_lock(&data->update_lock); 447 data->temp_high[nr] = TEMP_TO_REG(val); 448 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); 449 mutex_unlock(&data->update_lock); 450 return count; 451 } 452 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 453 const char *buf, size_t count) 454 { 455 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 456 int nr = sensor_attr->index; 457 458 struct it87_data *data = dev_get_drvdata(dev); 459 int val = simple_strtol(buf, NULL, 10); 460 461 mutex_lock(&data->update_lock); 462 data->temp_low[nr] = TEMP_TO_REG(val); 463 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); 464 mutex_unlock(&data->update_lock); 465 return count; 466 } 467 #define show_temp_offset(offset) \ 468 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 469 show_temp, NULL, offset - 1); \ 470 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 471 show_temp_max, set_temp_max, offset - 1); \ 472 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 473 show_temp_min, set_temp_min, offset - 1); 474 475 show_temp_offset(1); 476 show_temp_offset(2); 477 show_temp_offset(3); 478 479 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, 480 char *buf) 481 { 482 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 483 int nr = sensor_attr->index; 484 485 struct it87_data *data = it87_update_device(dev); 486 u8 reg = data->sensor; /* In case the value is updated while we use it */ 487 488 if (reg & (1 << nr)) 489 return sprintf(buf, "3\n"); /* thermal diode */ 490 if (reg & (8 << nr)) 491 return sprintf(buf, "4\n"); /* thermistor */ 492 return sprintf(buf, "0\n"); /* disabled */ 493 } 494 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, 495 const char *buf, size_t count) 496 { 497 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 498 int nr = sensor_attr->index; 499 500 struct it87_data *data = dev_get_drvdata(dev); 501 int val = simple_strtol(buf, NULL, 10); 502 503 mutex_lock(&data->update_lock); 504 505 data->sensor &= ~(1 << nr); 506 data->sensor &= ~(8 << nr); 507 if (val == 2) { /* backwards compatibility */ 508 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 " 509 "instead\n"); 510 val = 4; 511 } 512 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */ 513 if (val == 3) 514 data->sensor |= 1 << nr; 515 else if (val == 4) 516 data->sensor |= 8 << nr; 517 else if (val != 0) { 518 mutex_unlock(&data->update_lock); 519 return -EINVAL; 520 } 521 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor); 522 mutex_unlock(&data->update_lock); 523 return count; 524 } 525 #define show_sensor_offset(offset) \ 526 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ 527 show_sensor, set_sensor, offset - 1); 528 529 show_sensor_offset(1); 530 show_sensor_offset(2); 531 show_sensor_offset(3); 532 533 /* 3 Fans */ 534 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 535 char *buf) 536 { 537 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 538 int nr = sensor_attr->index; 539 540 struct it87_data *data = it87_update_device(dev); 541 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr], 542 DIV_FROM_REG(data->fan_div[nr]))); 543 } 544 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 545 char *buf) 546 { 547 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 548 int nr = sensor_attr->index; 549 550 struct it87_data *data = it87_update_device(dev); 551 return sprintf(buf,"%d\n", 552 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]))); 553 } 554 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 555 char *buf) 556 { 557 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 558 int nr = sensor_attr->index; 559 560 struct it87_data *data = it87_update_device(dev); 561 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 562 } 563 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr, 564 char *buf) 565 { 566 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 567 int nr = sensor_attr->index; 568 569 struct it87_data *data = it87_update_device(dev); 570 return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0); 571 } 572 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 573 char *buf) 574 { 575 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 576 int nr = sensor_attr->index; 577 578 struct it87_data *data = it87_update_device(dev); 579 return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]); 580 } 581 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr, 582 char *buf) 583 { 584 struct it87_data *data = it87_update_device(dev); 585 int index = (data->fan_ctl >> 4) & 0x07; 586 587 return sprintf(buf, "%u\n", pwm_freq[index]); 588 } 589 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 590 const char *buf, size_t count) 591 { 592 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 593 int nr = sensor_attr->index; 594 595 struct it87_data *data = dev_get_drvdata(dev); 596 int val = simple_strtol(buf, NULL, 10); 597 u8 reg; 598 599 mutex_lock(&data->update_lock); 600 reg = it87_read_value(data, IT87_REG_FAN_DIV); 601 switch (nr) { 602 case 0: data->fan_div[nr] = reg & 0x07; break; 603 case 1: data->fan_div[nr] = (reg >> 3) & 0x07; break; 604 case 2: data->fan_div[nr] = (reg & 0x40) ? 3 : 1; break; 605 } 606 607 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 608 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 609 mutex_unlock(&data->update_lock); 610 return count; 611 } 612 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 613 const char *buf, size_t count) 614 { 615 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 616 int nr = sensor_attr->index; 617 618 struct it87_data *data = dev_get_drvdata(dev); 619 unsigned long val = simple_strtoul(buf, NULL, 10); 620 int min; 621 u8 old; 622 623 mutex_lock(&data->update_lock); 624 old = it87_read_value(data, IT87_REG_FAN_DIV); 625 626 /* Save fan min limit */ 627 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 628 629 switch (nr) { 630 case 0: 631 case 1: 632 data->fan_div[nr] = DIV_TO_REG(val); 633 break; 634 case 2: 635 if (val < 8) 636 data->fan_div[nr] = 1; 637 else 638 data->fan_div[nr] = 3; 639 } 640 val = old & 0x80; 641 val |= (data->fan_div[0] & 0x07); 642 val |= (data->fan_div[1] & 0x07) << 3; 643 if (data->fan_div[2] == 3) 644 val |= 0x1 << 6; 645 it87_write_value(data, IT87_REG_FAN_DIV, val); 646 647 /* Restore fan min limit */ 648 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 649 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 650 651 mutex_unlock(&data->update_lock); 652 return count; 653 } 654 static ssize_t set_pwm_enable(struct device *dev, 655 struct device_attribute *attr, const char *buf, size_t count) 656 { 657 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 658 int nr = sensor_attr->index; 659 660 struct it87_data *data = dev_get_drvdata(dev); 661 int val = simple_strtol(buf, NULL, 10); 662 663 mutex_lock(&data->update_lock); 664 665 if (val == 0) { 666 int tmp; 667 /* make sure the fan is on when in on/off mode */ 668 tmp = it87_read_value(data, IT87_REG_FAN_CTL); 669 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr)); 670 /* set on/off mode */ 671 data->fan_main_ctrl &= ~(1 << nr); 672 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 673 } else if (val == 1) { 674 /* set SmartGuardian mode */ 675 data->fan_main_ctrl |= (1 << nr); 676 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 677 /* set saved pwm value, clear FAN_CTLX PWM mode bit */ 678 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); 679 } else { 680 mutex_unlock(&data->update_lock); 681 return -EINVAL; 682 } 683 684 mutex_unlock(&data->update_lock); 685 return count; 686 } 687 static ssize_t set_pwm(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 int val = simple_strtol(buf, NULL, 10); 695 696 if (val < 0 || val > 255) 697 return -EINVAL; 698 699 mutex_lock(&data->update_lock); 700 data->manual_pwm_ctl[nr] = val; 701 if (data->fan_main_ctrl & (1 << nr)) 702 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); 703 mutex_unlock(&data->update_lock); 704 return count; 705 } 706 static ssize_t set_pwm_freq(struct device *dev, 707 struct device_attribute *attr, const char *buf, size_t count) 708 { 709 struct it87_data *data = dev_get_drvdata(dev); 710 unsigned long val = simple_strtoul(buf, NULL, 10); 711 int i; 712 713 /* Search for the nearest available frequency */ 714 for (i = 0; i < 7; i++) { 715 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2) 716 break; 717 } 718 719 mutex_lock(&data->update_lock); 720 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f; 721 data->fan_ctl |= i << 4; 722 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl); 723 mutex_unlock(&data->update_lock); 724 725 return count; 726 } 727 728 #define show_fan_offset(offset) \ 729 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 730 show_fan, NULL, offset - 1); \ 731 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 732 show_fan_min, set_fan_min, offset - 1); \ 733 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 734 show_fan_div, set_fan_div, offset - 1); 735 736 show_fan_offset(1); 737 show_fan_offset(2); 738 show_fan_offset(3); 739 740 #define show_pwm_offset(offset) \ 741 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 742 show_pwm_enable, set_pwm_enable, offset - 1); \ 743 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 744 show_pwm, set_pwm, offset - 1); \ 745 static DEVICE_ATTR(pwm##offset##_freq, \ 746 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \ 747 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); 748 749 show_pwm_offset(1); 750 show_pwm_offset(2); 751 show_pwm_offset(3); 752 753 /* A different set of callbacks for 16-bit fans */ 754 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr, 755 char *buf) 756 { 757 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 758 int nr = sensor_attr->index; 759 struct it87_data *data = it87_update_device(dev); 760 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr])); 761 } 762 763 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr, 764 char *buf) 765 { 766 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 767 int nr = sensor_attr->index; 768 struct it87_data *data = it87_update_device(dev); 769 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr])); 770 } 771 772 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr, 773 const char *buf, size_t count) 774 { 775 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 776 int nr = sensor_attr->index; 777 struct it87_data *data = dev_get_drvdata(dev); 778 int val = simple_strtol(buf, NULL, 10); 779 780 mutex_lock(&data->update_lock); 781 data->fan_min[nr] = FAN16_TO_REG(val); 782 it87_write_value(data, IT87_REG_FAN_MIN[nr], 783 data->fan_min[nr] & 0xff); 784 it87_write_value(data, IT87_REG_FANX_MIN[nr], 785 data->fan_min[nr] >> 8); 786 mutex_unlock(&data->update_lock); 787 return count; 788 } 789 790 /* We want to use the same sysfs file names as 8-bit fans, but we need 791 different variable names, so we have to use SENSOR_ATTR instead of 792 SENSOR_DEVICE_ATTR. */ 793 #define show_fan16_offset(offset) \ 794 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \ 795 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \ 796 show_fan16, NULL, offset - 1); \ 797 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \ 798 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 799 show_fan16_min, set_fan16_min, offset - 1) 800 801 show_fan16_offset(1); 802 show_fan16_offset(2); 803 show_fan16_offset(3); 804 show_fan16_offset(4); 805 show_fan16_offset(5); 806 807 /* Alarms */ 808 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 809 { 810 struct it87_data *data = it87_update_device(dev); 811 return sprintf(buf, "%u\n", data->alarms); 812 } 813 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 814 815 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 816 char *buf) 817 { 818 int bitnr = to_sensor_dev_attr(attr)->index; 819 struct it87_data *data = it87_update_device(dev); 820 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 821 } 822 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8); 823 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9); 824 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10); 825 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11); 826 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12); 827 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13); 828 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14); 829 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15); 830 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0); 831 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1); 832 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2); 833 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3); 834 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6); 835 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16); 836 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17); 837 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18); 838 839 static ssize_t 840 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf) 841 { 842 struct it87_data *data = dev_get_drvdata(dev); 843 return sprintf(buf, "%u\n", data->vrm); 844 } 845 static ssize_t 846 store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 847 { 848 struct it87_data *data = dev_get_drvdata(dev); 849 u32 val; 850 851 val = simple_strtoul(buf, NULL, 10); 852 data->vrm = val; 853 854 return count; 855 } 856 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 857 858 static ssize_t 859 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf) 860 { 861 struct it87_data *data = it87_update_device(dev); 862 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 863 } 864 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 865 866 static ssize_t show_name(struct device *dev, struct device_attribute 867 *devattr, char *buf) 868 { 869 struct it87_data *data = dev_get_drvdata(dev); 870 return sprintf(buf, "%s\n", data->name); 871 } 872 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 873 874 static struct attribute *it87_attributes[] = { 875 &sensor_dev_attr_in0_input.dev_attr.attr, 876 &sensor_dev_attr_in1_input.dev_attr.attr, 877 &sensor_dev_attr_in2_input.dev_attr.attr, 878 &sensor_dev_attr_in3_input.dev_attr.attr, 879 &sensor_dev_attr_in4_input.dev_attr.attr, 880 &sensor_dev_attr_in5_input.dev_attr.attr, 881 &sensor_dev_attr_in6_input.dev_attr.attr, 882 &sensor_dev_attr_in7_input.dev_attr.attr, 883 &sensor_dev_attr_in8_input.dev_attr.attr, 884 &sensor_dev_attr_in0_min.dev_attr.attr, 885 &sensor_dev_attr_in1_min.dev_attr.attr, 886 &sensor_dev_attr_in2_min.dev_attr.attr, 887 &sensor_dev_attr_in3_min.dev_attr.attr, 888 &sensor_dev_attr_in4_min.dev_attr.attr, 889 &sensor_dev_attr_in5_min.dev_attr.attr, 890 &sensor_dev_attr_in6_min.dev_attr.attr, 891 &sensor_dev_attr_in7_min.dev_attr.attr, 892 &sensor_dev_attr_in0_max.dev_attr.attr, 893 &sensor_dev_attr_in1_max.dev_attr.attr, 894 &sensor_dev_attr_in2_max.dev_attr.attr, 895 &sensor_dev_attr_in3_max.dev_attr.attr, 896 &sensor_dev_attr_in4_max.dev_attr.attr, 897 &sensor_dev_attr_in5_max.dev_attr.attr, 898 &sensor_dev_attr_in6_max.dev_attr.attr, 899 &sensor_dev_attr_in7_max.dev_attr.attr, 900 &sensor_dev_attr_in0_alarm.dev_attr.attr, 901 &sensor_dev_attr_in1_alarm.dev_attr.attr, 902 &sensor_dev_attr_in2_alarm.dev_attr.attr, 903 &sensor_dev_attr_in3_alarm.dev_attr.attr, 904 &sensor_dev_attr_in4_alarm.dev_attr.attr, 905 &sensor_dev_attr_in5_alarm.dev_attr.attr, 906 &sensor_dev_attr_in6_alarm.dev_attr.attr, 907 &sensor_dev_attr_in7_alarm.dev_attr.attr, 908 909 &sensor_dev_attr_temp1_input.dev_attr.attr, 910 &sensor_dev_attr_temp2_input.dev_attr.attr, 911 &sensor_dev_attr_temp3_input.dev_attr.attr, 912 &sensor_dev_attr_temp1_max.dev_attr.attr, 913 &sensor_dev_attr_temp2_max.dev_attr.attr, 914 &sensor_dev_attr_temp3_max.dev_attr.attr, 915 &sensor_dev_attr_temp1_min.dev_attr.attr, 916 &sensor_dev_attr_temp2_min.dev_attr.attr, 917 &sensor_dev_attr_temp3_min.dev_attr.attr, 918 &sensor_dev_attr_temp1_type.dev_attr.attr, 919 &sensor_dev_attr_temp2_type.dev_attr.attr, 920 &sensor_dev_attr_temp3_type.dev_attr.attr, 921 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 922 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 923 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 924 925 &dev_attr_alarms.attr, 926 &dev_attr_name.attr, 927 NULL 928 }; 929 930 static const struct attribute_group it87_group = { 931 .attrs = it87_attributes, 932 }; 933 934 static struct attribute *it87_attributes_opt[] = { 935 &sensor_dev_attr_fan1_input16.dev_attr.attr, 936 &sensor_dev_attr_fan1_min16.dev_attr.attr, 937 &sensor_dev_attr_fan2_input16.dev_attr.attr, 938 &sensor_dev_attr_fan2_min16.dev_attr.attr, 939 &sensor_dev_attr_fan3_input16.dev_attr.attr, 940 &sensor_dev_attr_fan3_min16.dev_attr.attr, 941 &sensor_dev_attr_fan4_input16.dev_attr.attr, 942 &sensor_dev_attr_fan4_min16.dev_attr.attr, 943 &sensor_dev_attr_fan5_input16.dev_attr.attr, 944 &sensor_dev_attr_fan5_min16.dev_attr.attr, 945 946 &sensor_dev_attr_fan1_input.dev_attr.attr, 947 &sensor_dev_attr_fan1_min.dev_attr.attr, 948 &sensor_dev_attr_fan1_div.dev_attr.attr, 949 &sensor_dev_attr_fan2_input.dev_attr.attr, 950 &sensor_dev_attr_fan2_min.dev_attr.attr, 951 &sensor_dev_attr_fan2_div.dev_attr.attr, 952 &sensor_dev_attr_fan3_input.dev_attr.attr, 953 &sensor_dev_attr_fan3_min.dev_attr.attr, 954 &sensor_dev_attr_fan3_div.dev_attr.attr, 955 956 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 957 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 958 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 959 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 960 &sensor_dev_attr_fan5_alarm.dev_attr.attr, 961 962 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 963 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 964 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 965 &sensor_dev_attr_pwm1.dev_attr.attr, 966 &sensor_dev_attr_pwm2.dev_attr.attr, 967 &sensor_dev_attr_pwm3.dev_attr.attr, 968 &dev_attr_pwm1_freq.attr, 969 &dev_attr_pwm2_freq.attr, 970 &dev_attr_pwm3_freq.attr, 971 972 &dev_attr_vrm.attr, 973 &dev_attr_cpu0_vid.attr, 974 NULL 975 }; 976 977 static const struct attribute_group it87_group_opt = { 978 .attrs = it87_attributes_opt, 979 }; 980 981 /* SuperIO detection - will change isa_address if a chip is found */ 982 static int __init it87_find(unsigned short *address, 983 struct it87_sio_data *sio_data) 984 { 985 int err = -ENODEV; 986 u16 chip_type; 987 const char *board_vendor, *board_name; 988 989 superio_enter(); 990 chip_type = force_id ? force_id : superio_inw(DEVID); 991 992 switch (chip_type) { 993 case IT8705F_DEVID: 994 sio_data->type = it87; 995 break; 996 case IT8712F_DEVID: 997 sio_data->type = it8712; 998 break; 999 case IT8716F_DEVID: 1000 case IT8726F_DEVID: 1001 sio_data->type = it8716; 1002 break; 1003 case IT8718F_DEVID: 1004 sio_data->type = it8718; 1005 break; 1006 case IT8720F_DEVID: 1007 sio_data->type = it8720; 1008 break; 1009 case 0xffff: /* No device at all */ 1010 goto exit; 1011 default: 1012 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n", 1013 chip_type); 1014 goto exit; 1015 } 1016 1017 superio_select(PME); 1018 if (!(superio_inb(IT87_ACT_REG) & 0x01)) { 1019 pr_info("it87: Device not activated, skipping\n"); 1020 goto exit; 1021 } 1022 1023 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); 1024 if (*address == 0) { 1025 pr_info("it87: Base address not set, skipping\n"); 1026 goto exit; 1027 } 1028 1029 err = 0; 1030 sio_data->revision = superio_inb(DEVREV) & 0x0f; 1031 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n", 1032 chip_type, *address, sio_data->revision); 1033 1034 /* Read GPIO config and VID value from LDN 7 (GPIO) */ 1035 if (sio_data->type == it87) { 1036 /* The IT8705F doesn't have VID pins at all */ 1037 sio_data->skip_vid = 1; 1038 } else { 1039 int reg; 1040 1041 superio_select(GPIO); 1042 /* We need at least 4 VID pins */ 1043 reg = superio_inb(IT87_SIO_GPIO3_REG); 1044 if (reg & 0x0f) { 1045 pr_info("it87: VID is disabled (pins used for GPIO)\n"); 1046 sio_data->skip_vid = 1; 1047 } 1048 1049 /* Check if fan3 is there or not */ 1050 if (reg & (1 << 6)) 1051 sio_data->skip_pwm |= (1 << 2); 1052 if (reg & (1 << 7)) 1053 sio_data->skip_fan |= (1 << 2); 1054 1055 /* Check if fan2 is there or not */ 1056 reg = superio_inb(IT87_SIO_GPIO5_REG); 1057 if (reg & (1 << 1)) 1058 sio_data->skip_pwm |= (1 << 1); 1059 if (reg & (1 << 2)) 1060 sio_data->skip_fan |= (1 << 1); 1061 1062 if ((sio_data->type == it8718 || sio_data->type == it8720) 1063 && !(sio_data->skip_vid)) 1064 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG); 1065 1066 reg = superio_inb(IT87_SIO_PINX2_REG); 1067 if (reg & (1 << 0)) 1068 pr_info("it87: in3 is VCC (+5V)\n"); 1069 if (reg & (1 << 1)) 1070 pr_info("it87: in7 is VCCH (+5V Stand-By)\n"); 1071 } 1072 1073 /* Disable specific features based on DMI strings */ 1074 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR); 1075 board_name = dmi_get_system_info(DMI_BOARD_NAME); 1076 if (board_vendor && board_name) { 1077 if (strcmp(board_vendor, "nVIDIA") == 0 1078 && strcmp(board_name, "FN68PT") == 0) { 1079 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not 1080 connected to a fan, but to something else. One user 1081 has reported instant system power-off when changing 1082 the PWM2 duty cycle, so we disable it. 1083 I use the board name string as the trigger in case 1084 the same board is ever used in other systems. */ 1085 pr_info("it87: Disabling pwm2 due to " 1086 "hardware constraints\n"); 1087 sio_data->skip_pwm = (1 << 1); 1088 } 1089 } 1090 1091 exit: 1092 superio_exit(); 1093 return err; 1094 } 1095 1096 static int __devinit it87_probe(struct platform_device *pdev) 1097 { 1098 struct it87_data *data; 1099 struct resource *res; 1100 struct device *dev = &pdev->dev; 1101 struct it87_sio_data *sio_data = dev->platform_data; 1102 int err = 0; 1103 int enable_pwm_interface; 1104 static const char *names[] = { 1105 "it87", 1106 "it8712", 1107 "it8716", 1108 "it8718", 1109 "it8720", 1110 }; 1111 1112 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1113 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) { 1114 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", 1115 (unsigned long)res->start, 1116 (unsigned long)(res->start + IT87_EC_EXTENT - 1)); 1117 err = -EBUSY; 1118 goto ERROR0; 1119 } 1120 1121 if (!(data = kzalloc(sizeof(struct it87_data), GFP_KERNEL))) { 1122 err = -ENOMEM; 1123 goto ERROR1; 1124 } 1125 1126 data->addr = res->start; 1127 data->type = sio_data->type; 1128 data->revision = sio_data->revision; 1129 data->name = names[sio_data->type]; 1130 1131 /* Now, we do the remaining detection. */ 1132 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80) 1133 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) { 1134 err = -ENODEV; 1135 goto ERROR2; 1136 } 1137 1138 platform_set_drvdata(pdev, data); 1139 1140 mutex_init(&data->update_lock); 1141 1142 /* Check PWM configuration */ 1143 enable_pwm_interface = it87_check_pwm(dev); 1144 1145 /* Initialize the IT87 chip */ 1146 it87_init_device(pdev); 1147 1148 /* Register sysfs hooks */ 1149 if ((err = sysfs_create_group(&dev->kobj, &it87_group))) 1150 goto ERROR2; 1151 1152 /* Do not create fan files for disabled fans */ 1153 if (has_16bit_fans(data)) { 1154 /* 16-bit tachometers */ 1155 if (data->has_fan & (1 << 0)) { 1156 if ((err = device_create_file(dev, 1157 &sensor_dev_attr_fan1_input16.dev_attr)) 1158 || (err = device_create_file(dev, 1159 &sensor_dev_attr_fan1_min16.dev_attr)) 1160 || (err = device_create_file(dev, 1161 &sensor_dev_attr_fan1_alarm.dev_attr))) 1162 goto ERROR4; 1163 } 1164 if (data->has_fan & (1 << 1)) { 1165 if ((err = device_create_file(dev, 1166 &sensor_dev_attr_fan2_input16.dev_attr)) 1167 || (err = device_create_file(dev, 1168 &sensor_dev_attr_fan2_min16.dev_attr)) 1169 || (err = device_create_file(dev, 1170 &sensor_dev_attr_fan2_alarm.dev_attr))) 1171 goto ERROR4; 1172 } 1173 if (data->has_fan & (1 << 2)) { 1174 if ((err = device_create_file(dev, 1175 &sensor_dev_attr_fan3_input16.dev_attr)) 1176 || (err = device_create_file(dev, 1177 &sensor_dev_attr_fan3_min16.dev_attr)) 1178 || (err = device_create_file(dev, 1179 &sensor_dev_attr_fan3_alarm.dev_attr))) 1180 goto ERROR4; 1181 } 1182 if (data->has_fan & (1 << 3)) { 1183 if ((err = device_create_file(dev, 1184 &sensor_dev_attr_fan4_input16.dev_attr)) 1185 || (err = device_create_file(dev, 1186 &sensor_dev_attr_fan4_min16.dev_attr)) 1187 || (err = device_create_file(dev, 1188 &sensor_dev_attr_fan4_alarm.dev_attr))) 1189 goto ERROR4; 1190 } 1191 if (data->has_fan & (1 << 4)) { 1192 if ((err = device_create_file(dev, 1193 &sensor_dev_attr_fan5_input16.dev_attr)) 1194 || (err = device_create_file(dev, 1195 &sensor_dev_attr_fan5_min16.dev_attr)) 1196 || (err = device_create_file(dev, 1197 &sensor_dev_attr_fan5_alarm.dev_attr))) 1198 goto ERROR4; 1199 } 1200 } else { 1201 /* 8-bit tachometers with clock divider */ 1202 if (data->has_fan & (1 << 0)) { 1203 if ((err = device_create_file(dev, 1204 &sensor_dev_attr_fan1_input.dev_attr)) 1205 || (err = device_create_file(dev, 1206 &sensor_dev_attr_fan1_min.dev_attr)) 1207 || (err = device_create_file(dev, 1208 &sensor_dev_attr_fan1_div.dev_attr)) 1209 || (err = device_create_file(dev, 1210 &sensor_dev_attr_fan1_alarm.dev_attr))) 1211 goto ERROR4; 1212 } 1213 if (data->has_fan & (1 << 1)) { 1214 if ((err = device_create_file(dev, 1215 &sensor_dev_attr_fan2_input.dev_attr)) 1216 || (err = device_create_file(dev, 1217 &sensor_dev_attr_fan2_min.dev_attr)) 1218 || (err = device_create_file(dev, 1219 &sensor_dev_attr_fan2_div.dev_attr)) 1220 || (err = device_create_file(dev, 1221 &sensor_dev_attr_fan2_alarm.dev_attr))) 1222 goto ERROR4; 1223 } 1224 if (data->has_fan & (1 << 2)) { 1225 if ((err = device_create_file(dev, 1226 &sensor_dev_attr_fan3_input.dev_attr)) 1227 || (err = device_create_file(dev, 1228 &sensor_dev_attr_fan3_min.dev_attr)) 1229 || (err = device_create_file(dev, 1230 &sensor_dev_attr_fan3_div.dev_attr)) 1231 || (err = device_create_file(dev, 1232 &sensor_dev_attr_fan3_alarm.dev_attr))) 1233 goto ERROR4; 1234 } 1235 } 1236 1237 if (enable_pwm_interface) { 1238 if (!(sio_data->skip_pwm & (1 << 0))) { 1239 if ((err = device_create_file(dev, 1240 &sensor_dev_attr_pwm1_enable.dev_attr)) 1241 || (err = device_create_file(dev, 1242 &sensor_dev_attr_pwm1.dev_attr)) 1243 || (err = device_create_file(dev, 1244 &dev_attr_pwm1_freq))) 1245 goto ERROR4; 1246 } 1247 if (!(sio_data->skip_pwm & (1 << 1))) { 1248 if ((err = device_create_file(dev, 1249 &sensor_dev_attr_pwm2_enable.dev_attr)) 1250 || (err = device_create_file(dev, 1251 &sensor_dev_attr_pwm2.dev_attr)) 1252 || (err = device_create_file(dev, 1253 &dev_attr_pwm2_freq))) 1254 goto ERROR4; 1255 } 1256 if (!(sio_data->skip_pwm & (1 << 2))) { 1257 if ((err = device_create_file(dev, 1258 &sensor_dev_attr_pwm3_enable.dev_attr)) 1259 || (err = device_create_file(dev, 1260 &sensor_dev_attr_pwm3.dev_attr)) 1261 || (err = device_create_file(dev, 1262 &dev_attr_pwm3_freq))) 1263 goto ERROR4; 1264 } 1265 } 1266 1267 if (!sio_data->skip_vid) { 1268 data->vrm = vid_which_vrm(); 1269 /* VID reading from Super-I/O config space if available */ 1270 data->vid = sio_data->vid_value; 1271 if ((err = device_create_file(dev, 1272 &dev_attr_vrm)) 1273 || (err = device_create_file(dev, 1274 &dev_attr_cpu0_vid))) 1275 goto ERROR4; 1276 } 1277 1278 data->hwmon_dev = hwmon_device_register(dev); 1279 if (IS_ERR(data->hwmon_dev)) { 1280 err = PTR_ERR(data->hwmon_dev); 1281 goto ERROR4; 1282 } 1283 1284 return 0; 1285 1286 ERROR4: 1287 sysfs_remove_group(&dev->kobj, &it87_group); 1288 sysfs_remove_group(&dev->kobj, &it87_group_opt); 1289 ERROR2: 1290 platform_set_drvdata(pdev, NULL); 1291 kfree(data); 1292 ERROR1: 1293 release_region(res->start, IT87_EC_EXTENT); 1294 ERROR0: 1295 return err; 1296 } 1297 1298 static int __devexit it87_remove(struct platform_device *pdev) 1299 { 1300 struct it87_data *data = platform_get_drvdata(pdev); 1301 1302 hwmon_device_unregister(data->hwmon_dev); 1303 sysfs_remove_group(&pdev->dev.kobj, &it87_group); 1304 sysfs_remove_group(&pdev->dev.kobj, &it87_group_opt); 1305 1306 release_region(data->addr, IT87_EC_EXTENT); 1307 platform_set_drvdata(pdev, NULL); 1308 kfree(data); 1309 1310 return 0; 1311 } 1312 1313 /* Must be called with data->update_lock held, except during initialization. 1314 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1315 would slow down the IT87 access and should not be necessary. */ 1316 static int it87_read_value(struct it87_data *data, u8 reg) 1317 { 1318 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1319 return inb_p(data->addr + IT87_DATA_REG_OFFSET); 1320 } 1321 1322 /* Must be called with data->update_lock held, except during initialization. 1323 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1324 would slow down the IT87 access and should not be necessary. */ 1325 static void it87_write_value(struct it87_data *data, u8 reg, u8 value) 1326 { 1327 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1328 outb_p(value, data->addr + IT87_DATA_REG_OFFSET); 1329 } 1330 1331 /* Return 1 if and only if the PWM interface is safe to use */ 1332 static int __devinit it87_check_pwm(struct device *dev) 1333 { 1334 struct it87_data *data = dev_get_drvdata(dev); 1335 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off 1336 * and polarity set to active low is sign that this is the case so we 1337 * disable pwm control to protect the user. */ 1338 int tmp = it87_read_value(data, IT87_REG_FAN_CTL); 1339 if ((tmp & 0x87) == 0) { 1340 if (fix_pwm_polarity) { 1341 /* The user asks us to attempt a chip reconfiguration. 1342 * This means switching to active high polarity and 1343 * inverting all fan speed values. */ 1344 int i; 1345 u8 pwm[3]; 1346 1347 for (i = 0; i < 3; i++) 1348 pwm[i] = it87_read_value(data, 1349 IT87_REG_PWM(i)); 1350 1351 /* If any fan is in automatic pwm mode, the polarity 1352 * might be correct, as suspicious as it seems, so we 1353 * better don't change anything (but still disable the 1354 * PWM interface). */ 1355 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) { 1356 dev_info(dev, "Reconfiguring PWM to " 1357 "active high polarity\n"); 1358 it87_write_value(data, IT87_REG_FAN_CTL, 1359 tmp | 0x87); 1360 for (i = 0; i < 3; i++) 1361 it87_write_value(data, 1362 IT87_REG_PWM(i), 1363 0x7f & ~pwm[i]); 1364 return 1; 1365 } 1366 1367 dev_info(dev, "PWM configuration is " 1368 "too broken to be fixed\n"); 1369 } 1370 1371 dev_info(dev, "Detected broken BIOS " 1372 "defaults, disabling PWM interface\n"); 1373 return 0; 1374 } else if (fix_pwm_polarity) { 1375 dev_info(dev, "PWM configuration looks " 1376 "sane, won't touch\n"); 1377 } 1378 1379 return 1; 1380 } 1381 1382 /* Called when we have found a new IT87. */ 1383 static void __devinit it87_init_device(struct platform_device *pdev) 1384 { 1385 struct it87_sio_data *sio_data = pdev->dev.platform_data; 1386 struct it87_data *data = platform_get_drvdata(pdev); 1387 int tmp, i; 1388 u8 mask; 1389 1390 /* initialize to sane defaults: 1391 * - if the chip is in manual pwm mode, this will be overwritten with 1392 * the actual settings on the chip (so in this case, initialization 1393 * is not needed) 1394 * - if in automatic or on/off mode, we could switch to manual mode, 1395 * read the registers and set manual_pwm_ctl accordingly, but currently 1396 * this is not implemented, so we initialize to something sane */ 1397 for (i = 0; i < 3; i++) { 1398 data->manual_pwm_ctl[i] = 0xff; 1399 } 1400 1401 /* Some chips seem to have default value 0xff for all limit 1402 * registers. For low voltage limits it makes no sense and triggers 1403 * alarms, so change to 0 instead. For high temperature limits, it 1404 * means -1 degree C, which surprisingly doesn't trigger an alarm, 1405 * but is still confusing, so change to 127 degrees C. */ 1406 for (i = 0; i < 8; i++) { 1407 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i)); 1408 if (tmp == 0xff) 1409 it87_write_value(data, IT87_REG_VIN_MIN(i), 0); 1410 } 1411 for (i = 0; i < 3; i++) { 1412 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1413 if (tmp == 0xff) 1414 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127); 1415 } 1416 1417 /* Check if temperature channels are reset manually or by some reason */ 1418 tmp = it87_read_value(data, IT87_REG_TEMP_ENABLE); 1419 if ((tmp & 0x3f) == 0) { 1420 /* Temp1,Temp3=thermistor; Temp2=thermal diode */ 1421 tmp = (tmp & 0xc0) | 0x2a; 1422 it87_write_value(data, IT87_REG_TEMP_ENABLE, tmp); 1423 } 1424 data->sensor = tmp; 1425 1426 /* Check if voltage monitors are reset manually or by some reason */ 1427 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE); 1428 if ((tmp & 0xff) == 0) { 1429 /* Enable all voltage monitors */ 1430 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff); 1431 } 1432 1433 /* Check if tachometers are reset manually or by some reason */ 1434 mask = 0x70 & ~(sio_data->skip_fan << 4); 1435 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL); 1436 if ((data->fan_main_ctrl & mask) == 0) { 1437 /* Enable all fan tachometers */ 1438 data->fan_main_ctrl |= mask; 1439 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 1440 } 1441 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07; 1442 1443 /* Set tachometers to 16-bit mode if needed */ 1444 if (has_16bit_fans(data)) { 1445 tmp = it87_read_value(data, IT87_REG_FAN_16BIT); 1446 if (~tmp & 0x07 & data->has_fan) { 1447 dev_dbg(&pdev->dev, 1448 "Setting fan1-3 to 16-bit mode\n"); 1449 it87_write_value(data, IT87_REG_FAN_16BIT, 1450 tmp | 0x07); 1451 } 1452 /* IT8705F only supports three fans. */ 1453 if (data->type != it87) { 1454 if (tmp & (1 << 4)) 1455 data->has_fan |= (1 << 3); /* fan4 enabled */ 1456 if (tmp & (1 << 5)) 1457 data->has_fan |= (1 << 4); /* fan5 enabled */ 1458 } 1459 } 1460 1461 /* Fan input pins may be used for alternative functions */ 1462 data->has_fan &= ~sio_data->skip_fan; 1463 1464 /* Set current fan mode registers and the default settings for the 1465 * other mode registers */ 1466 for (i = 0; i < 3; i++) { 1467 if (data->fan_main_ctrl & (1 << i)) { 1468 /* pwm mode */ 1469 tmp = it87_read_value(data, IT87_REG_PWM(i)); 1470 if (tmp & 0x80) { 1471 /* automatic pwm - not yet implemented, but 1472 * leave the settings made by the BIOS alone 1473 * until a change is requested via the sysfs 1474 * interface */ 1475 } else { 1476 /* manual pwm */ 1477 data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp); 1478 } 1479 } 1480 } 1481 1482 /* Start monitoring */ 1483 it87_write_value(data, IT87_REG_CONFIG, 1484 (it87_read_value(data, IT87_REG_CONFIG) & 0x36) 1485 | (update_vbat ? 0x41 : 0x01)); 1486 } 1487 1488 static struct it87_data *it87_update_device(struct device *dev) 1489 { 1490 struct it87_data *data = dev_get_drvdata(dev); 1491 int i; 1492 1493 mutex_lock(&data->update_lock); 1494 1495 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 1496 || !data->valid) { 1497 1498 if (update_vbat) { 1499 /* Cleared after each update, so reenable. Value 1500 returned by this read will be previous value */ 1501 it87_write_value(data, IT87_REG_CONFIG, 1502 it87_read_value(data, IT87_REG_CONFIG) | 0x40); 1503 } 1504 for (i = 0; i <= 7; i++) { 1505 data->in[i] = 1506 it87_read_value(data, IT87_REG_VIN(i)); 1507 data->in_min[i] = 1508 it87_read_value(data, IT87_REG_VIN_MIN(i)); 1509 data->in_max[i] = 1510 it87_read_value(data, IT87_REG_VIN_MAX(i)); 1511 } 1512 /* in8 (battery) has no limit registers */ 1513 data->in[8] = 1514 it87_read_value(data, IT87_REG_VIN(8)); 1515 1516 for (i = 0; i < 5; i++) { 1517 /* Skip disabled fans */ 1518 if (!(data->has_fan & (1 << i))) 1519 continue; 1520 1521 data->fan_min[i] = 1522 it87_read_value(data, IT87_REG_FAN_MIN[i]); 1523 data->fan[i] = it87_read_value(data, 1524 IT87_REG_FAN[i]); 1525 /* Add high byte if in 16-bit mode */ 1526 if (has_16bit_fans(data)) { 1527 data->fan[i] |= it87_read_value(data, 1528 IT87_REG_FANX[i]) << 8; 1529 data->fan_min[i] |= it87_read_value(data, 1530 IT87_REG_FANX_MIN[i]) << 8; 1531 } 1532 } 1533 for (i = 0; i < 3; i++) { 1534 data->temp[i] = 1535 it87_read_value(data, IT87_REG_TEMP(i)); 1536 data->temp_high[i] = 1537 it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1538 data->temp_low[i] = 1539 it87_read_value(data, IT87_REG_TEMP_LOW(i)); 1540 } 1541 1542 /* Newer chips don't have clock dividers */ 1543 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) { 1544 i = it87_read_value(data, IT87_REG_FAN_DIV); 1545 data->fan_div[0] = i & 0x07; 1546 data->fan_div[1] = (i >> 3) & 0x07; 1547 data->fan_div[2] = (i & 0x40) ? 3 : 1; 1548 } 1549 1550 data->alarms = 1551 it87_read_value(data, IT87_REG_ALARM1) | 1552 (it87_read_value(data, IT87_REG_ALARM2) << 8) | 1553 (it87_read_value(data, IT87_REG_ALARM3) << 16); 1554 data->fan_main_ctrl = it87_read_value(data, 1555 IT87_REG_FAN_MAIN_CTRL); 1556 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL); 1557 1558 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE); 1559 /* The 8705 does not have VID capability. 1560 The 8718 and the 8720 don't use IT87_REG_VID for the 1561 same purpose. */ 1562 if (data->type == it8712 || data->type == it8716) { 1563 data->vid = it87_read_value(data, IT87_REG_VID); 1564 /* The older IT8712F revisions had only 5 VID pins, 1565 but we assume it is always safe to read 6 bits. */ 1566 data->vid &= 0x3f; 1567 } 1568 data->last_updated = jiffies; 1569 data->valid = 1; 1570 } 1571 1572 mutex_unlock(&data->update_lock); 1573 1574 return data; 1575 } 1576 1577 static int __init it87_device_add(unsigned short address, 1578 const struct it87_sio_data *sio_data) 1579 { 1580 struct resource res = { 1581 .start = address + IT87_EC_OFFSET, 1582 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1, 1583 .name = DRVNAME, 1584 .flags = IORESOURCE_IO, 1585 }; 1586 int err; 1587 1588 err = acpi_check_resource_conflict(&res); 1589 if (err) 1590 goto exit; 1591 1592 pdev = platform_device_alloc(DRVNAME, address); 1593 if (!pdev) { 1594 err = -ENOMEM; 1595 printk(KERN_ERR DRVNAME ": Device allocation failed\n"); 1596 goto exit; 1597 } 1598 1599 err = platform_device_add_resources(pdev, &res, 1); 1600 if (err) { 1601 printk(KERN_ERR DRVNAME ": Device resource addition failed " 1602 "(%d)\n", err); 1603 goto exit_device_put; 1604 } 1605 1606 err = platform_device_add_data(pdev, sio_data, 1607 sizeof(struct it87_sio_data)); 1608 if (err) { 1609 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n"); 1610 goto exit_device_put; 1611 } 1612 1613 err = platform_device_add(pdev); 1614 if (err) { 1615 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", 1616 err); 1617 goto exit_device_put; 1618 } 1619 1620 return 0; 1621 1622 exit_device_put: 1623 platform_device_put(pdev); 1624 exit: 1625 return err; 1626 } 1627 1628 static int __init sm_it87_init(void) 1629 { 1630 int err; 1631 unsigned short isa_address=0; 1632 struct it87_sio_data sio_data; 1633 1634 memset(&sio_data, 0, sizeof(struct it87_sio_data)); 1635 err = it87_find(&isa_address, &sio_data); 1636 if (err) 1637 return err; 1638 err = platform_driver_register(&it87_driver); 1639 if (err) 1640 return err; 1641 1642 err = it87_device_add(isa_address, &sio_data); 1643 if (err){ 1644 platform_driver_unregister(&it87_driver); 1645 return err; 1646 } 1647 1648 return 0; 1649 } 1650 1651 static void __exit sm_it87_exit(void) 1652 { 1653 platform_device_unregister(pdev); 1654 platform_driver_unregister(&it87_driver); 1655 } 1656 1657 1658 MODULE_AUTHOR("Chris Gauthron, " 1659 "Jean Delvare <khali@linux-fr.org>"); 1660 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8720F/8726F, SiS950 driver"); 1661 module_param(update_vbat, bool, 0); 1662 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); 1663 module_param(fix_pwm_polarity, bool, 0); 1664 MODULE_PARM_DESC(fix_pwm_polarity, "Force PWM polarity to active high (DANGEROUS)"); 1665 MODULE_LICENSE("GPL"); 1666 1667 module_init(sm_it87_init); 1668 module_exit(sm_it87_exit); 1669