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 IT8726F Super I/O chip w/LPC interface 18 Sis950 A clone of the IT8705F 19 20 Copyright (C) 2001 Chris Gauthron 21 Copyright (C) 2005-2007 Jean Delvare <khali@linux-fr.org> 22 23 This program is free software; you can redistribute it and/or modify 24 it under the terms of the GNU General Public License as published by 25 the Free Software Foundation; either version 2 of the License, or 26 (at your option) any later version. 27 28 This program is distributed in the hope that it will be useful, 29 but WITHOUT ANY WARRANTY; without even the implied warranty of 30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 31 GNU General Public License for more details. 32 33 You should have received a copy of the GNU General Public License 34 along with this program; if not, write to the Free Software 35 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 36 */ 37 38 #include <linux/module.h> 39 #include <linux/init.h> 40 #include <linux/slab.h> 41 #include <linux/jiffies.h> 42 #include <linux/platform_device.h> 43 #include <linux/hwmon.h> 44 #include <linux/hwmon-sysfs.h> 45 #include <linux/hwmon-vid.h> 46 #include <linux/err.h> 47 #include <linux/mutex.h> 48 #include <linux/sysfs.h> 49 #include <linux/string.h> 50 #include <linux/dmi.h> 51 #include <asm/io.h> 52 53 #define DRVNAME "it87" 54 55 enum chips { it87, it8712, it8716, it8718 }; 56 57 static unsigned short force_id; 58 module_param(force_id, ushort, 0); 59 MODULE_PARM_DESC(force_id, "Override the detected device ID"); 60 61 static struct platform_device *pdev; 62 63 #define REG 0x2e /* The register to read/write */ 64 #define DEV 0x07 /* Register: Logical device select */ 65 #define VAL 0x2f /* The value to read/write */ 66 #define PME 0x04 /* The device with the fan registers in it */ 67 #define GPIO 0x07 /* The device with the IT8718F VID value in it */ 68 #define DEVID 0x20 /* Register: Device ID */ 69 #define DEVREV 0x22 /* Register: Device Revision */ 70 71 static inline int 72 superio_inb(int reg) 73 { 74 outb(reg, REG); 75 return inb(VAL); 76 } 77 78 static int superio_inw(int reg) 79 { 80 int val; 81 outb(reg++, REG); 82 val = inb(VAL) << 8; 83 outb(reg, REG); 84 val |= inb(VAL); 85 return val; 86 } 87 88 static inline void 89 superio_select(int ldn) 90 { 91 outb(DEV, REG); 92 outb(ldn, VAL); 93 } 94 95 static inline void 96 superio_enter(void) 97 { 98 outb(0x87, REG); 99 outb(0x01, REG); 100 outb(0x55, REG); 101 outb(0x55, REG); 102 } 103 104 static inline void 105 superio_exit(void) 106 { 107 outb(0x02, REG); 108 outb(0x02, VAL); 109 } 110 111 /* Logical device 4 registers */ 112 #define IT8712F_DEVID 0x8712 113 #define IT8705F_DEVID 0x8705 114 #define IT8716F_DEVID 0x8716 115 #define IT8718F_DEVID 0x8718 116 #define IT8726F_DEVID 0x8726 117 #define IT87_ACT_REG 0x30 118 #define IT87_BASE_REG 0x60 119 120 /* Logical device 7 registers (IT8712F and later) */ 121 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */ 122 #define IT87_SIO_VID_REG 0xfc /* VID value */ 123 124 /* Update battery voltage after every reading if true */ 125 static int update_vbat; 126 127 /* Not all BIOSes properly configure the PWM registers */ 128 static int fix_pwm_polarity; 129 130 /* Many IT87 constants specified below */ 131 132 /* Length of ISA address segment */ 133 #define IT87_EXTENT 8 134 135 /* Length of ISA address segment for Environmental Controller */ 136 #define IT87_EC_EXTENT 2 137 138 /* Offset of EC registers from ISA base address */ 139 #define IT87_EC_OFFSET 5 140 141 /* Where are the ISA address/data registers relative to the EC base address */ 142 #define IT87_ADDR_REG_OFFSET 0 143 #define IT87_DATA_REG_OFFSET 1 144 145 /*----- The IT87 registers -----*/ 146 147 #define IT87_REG_CONFIG 0x00 148 149 #define IT87_REG_ALARM1 0x01 150 #define IT87_REG_ALARM2 0x02 151 #define IT87_REG_ALARM3 0x03 152 153 /* The IT8718F has the VID value in a different register, in Super-I/O 154 configuration space. */ 155 #define IT87_REG_VID 0x0a 156 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b 157 for fan divisors. Later IT8712F revisions must use 16-bit tachometer 158 mode. */ 159 #define IT87_REG_FAN_DIV 0x0b 160 #define IT87_REG_FAN_16BIT 0x0c 161 162 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */ 163 164 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 }; 165 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 }; 166 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 }; 167 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 }; 168 #define IT87_REG_FAN_MAIN_CTRL 0x13 169 #define IT87_REG_FAN_CTL 0x14 170 #define IT87_REG_PWM(nr) (0x15 + (nr)) 171 172 #define IT87_REG_VIN(nr) (0x20 + (nr)) 173 #define IT87_REG_TEMP(nr) (0x29 + (nr)) 174 175 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2) 176 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2) 177 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2) 178 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2) 179 180 #define IT87_REG_VIN_ENABLE 0x50 181 #define IT87_REG_TEMP_ENABLE 0x51 182 183 #define IT87_REG_CHIPID 0x58 184 185 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255)) 186 #define IN_FROM_REG(val) ((val) * 16) 187 188 static inline u8 FAN_TO_REG(long rpm, int div) 189 { 190 if (rpm == 0) 191 return 255; 192 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 193 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 194 254); 195 } 196 197 static inline u16 FAN16_TO_REG(long rpm) 198 { 199 if (rpm == 0) 200 return 0xffff; 201 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe); 202 } 203 204 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div))) 205 /* The divider is fixed to 2 in 16-bit mode */ 206 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2)) 207 208 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\ 209 ((val)+500)/1000),-128,127)) 210 #define TEMP_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000) 211 212 #define PWM_TO_REG(val) ((val) >> 1) 213 #define PWM_FROM_REG(val) (((val)&0x7f) << 1) 214 215 static int DIV_TO_REG(int val) 216 { 217 int answer = 0; 218 while (answer < 7 && (val >>= 1)) 219 answer++; 220 return answer; 221 } 222 #define DIV_FROM_REG(val) (1 << (val)) 223 224 static const unsigned int pwm_freq[8] = { 225 48000000 / 128, 226 24000000 / 128, 227 12000000 / 128, 228 8000000 / 128, 229 6000000 / 128, 230 3000000 / 128, 231 1500000 / 128, 232 750000 / 128, 233 }; 234 235 236 struct it87_sio_data { 237 enum chips type; 238 /* Values read from Super-I/O config space */ 239 u8 revision; 240 u8 vid_value; 241 /* Values set based on DMI strings */ 242 u8 skip_pwm; 243 }; 244 245 /* For each registered chip, we need to keep some data in memory. 246 The structure is dynamically allocated. */ 247 struct it87_data { 248 struct device *hwmon_dev; 249 enum chips type; 250 u8 revision; 251 252 unsigned short addr; 253 const char *name; 254 struct mutex update_lock; 255 char valid; /* !=0 if following fields are valid */ 256 unsigned long last_updated; /* In jiffies */ 257 258 u8 in[9]; /* Register value */ 259 u8 in_max[8]; /* Register value */ 260 u8 in_min[8]; /* Register value */ 261 u8 has_fan; /* Bitfield, fans enabled */ 262 u16 fan[5]; /* Register values, possibly combined */ 263 u16 fan_min[5]; /* Register values, possibly combined */ 264 u8 temp[3]; /* Register value */ 265 u8 temp_high[3]; /* Register value */ 266 u8 temp_low[3]; /* Register value */ 267 u8 sensor; /* Register value */ 268 u8 fan_div[3]; /* Register encoding, shifted right */ 269 u8 vid; /* Register encoding, combined */ 270 u8 vrm; 271 u32 alarms; /* Register encoding, combined */ 272 u8 fan_main_ctrl; /* Register value */ 273 u8 fan_ctl; /* Register value */ 274 u8 manual_pwm_ctl[3]; /* manual PWM value set by user */ 275 }; 276 277 static inline int has_16bit_fans(const struct it87_data *data) 278 { 279 /* IT8705F Datasheet 0.4.1, 3h == Version G. 280 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J. 281 These are the first revisions with 16bit tachometer support. */ 282 return (data->type == it87 && data->revision >= 0x03) 283 || (data->type == it8712 && data->revision >= 0x08) 284 || data->type == it8716 285 || data->type == it8718; 286 } 287 288 static int it87_probe(struct platform_device *pdev); 289 static int __devexit it87_remove(struct platform_device *pdev); 290 291 static int it87_read_value(struct it87_data *data, u8 reg); 292 static void it87_write_value(struct it87_data *data, u8 reg, u8 value); 293 static struct it87_data *it87_update_device(struct device *dev); 294 static int it87_check_pwm(struct device *dev); 295 static void it87_init_device(struct platform_device *pdev); 296 297 298 static struct platform_driver it87_driver = { 299 .driver = { 300 .owner = THIS_MODULE, 301 .name = DRVNAME, 302 }, 303 .probe = it87_probe, 304 .remove = __devexit_p(it87_remove), 305 }; 306 307 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 308 char *buf) 309 { 310 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 311 int nr = sensor_attr->index; 312 313 struct it87_data *data = it87_update_device(dev); 314 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); 315 } 316 317 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 318 char *buf) 319 { 320 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 321 int nr = sensor_attr->index; 322 323 struct it87_data *data = it87_update_device(dev); 324 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); 325 } 326 327 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 328 char *buf) 329 { 330 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 331 int nr = sensor_attr->index; 332 333 struct it87_data *data = it87_update_device(dev); 334 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); 335 } 336 337 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 338 const char *buf, size_t count) 339 { 340 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 341 int nr = sensor_attr->index; 342 343 struct it87_data *data = dev_get_drvdata(dev); 344 unsigned long val = simple_strtoul(buf, NULL, 10); 345 346 mutex_lock(&data->update_lock); 347 data->in_min[nr] = IN_TO_REG(val); 348 it87_write_value(data, IT87_REG_VIN_MIN(nr), 349 data->in_min[nr]); 350 mutex_unlock(&data->update_lock); 351 return count; 352 } 353 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 354 const char *buf, size_t count) 355 { 356 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 357 int nr = sensor_attr->index; 358 359 struct it87_data *data = dev_get_drvdata(dev); 360 unsigned long val = simple_strtoul(buf, NULL, 10); 361 362 mutex_lock(&data->update_lock); 363 data->in_max[nr] = IN_TO_REG(val); 364 it87_write_value(data, IT87_REG_VIN_MAX(nr), 365 data->in_max[nr]); 366 mutex_unlock(&data->update_lock); 367 return count; 368 } 369 370 #define show_in_offset(offset) \ 371 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 372 show_in, NULL, offset); 373 374 #define limit_in_offset(offset) \ 375 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 376 show_in_min, set_in_min, offset); \ 377 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 378 show_in_max, set_in_max, offset); 379 380 show_in_offset(0); 381 limit_in_offset(0); 382 show_in_offset(1); 383 limit_in_offset(1); 384 show_in_offset(2); 385 limit_in_offset(2); 386 show_in_offset(3); 387 limit_in_offset(3); 388 show_in_offset(4); 389 limit_in_offset(4); 390 show_in_offset(5); 391 limit_in_offset(5); 392 show_in_offset(6); 393 limit_in_offset(6); 394 show_in_offset(7); 395 limit_in_offset(7); 396 show_in_offset(8); 397 398 /* 3 temperatures */ 399 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 400 char *buf) 401 { 402 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 403 int nr = sensor_attr->index; 404 405 struct it87_data *data = it87_update_device(dev); 406 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 407 } 408 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 409 char *buf) 410 { 411 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 412 int nr = sensor_attr->index; 413 414 struct it87_data *data = it87_update_device(dev); 415 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); 416 } 417 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 418 char *buf) 419 { 420 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 421 int nr = sensor_attr->index; 422 423 struct it87_data *data = it87_update_device(dev); 424 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); 425 } 426 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 427 const char *buf, size_t count) 428 { 429 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 430 int nr = sensor_attr->index; 431 432 struct it87_data *data = dev_get_drvdata(dev); 433 int val = simple_strtol(buf, NULL, 10); 434 435 mutex_lock(&data->update_lock); 436 data->temp_high[nr] = TEMP_TO_REG(val); 437 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); 438 mutex_unlock(&data->update_lock); 439 return count; 440 } 441 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 442 const char *buf, size_t count) 443 { 444 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 445 int nr = sensor_attr->index; 446 447 struct it87_data *data = dev_get_drvdata(dev); 448 int val = simple_strtol(buf, NULL, 10); 449 450 mutex_lock(&data->update_lock); 451 data->temp_low[nr] = TEMP_TO_REG(val); 452 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); 453 mutex_unlock(&data->update_lock); 454 return count; 455 } 456 #define show_temp_offset(offset) \ 457 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 458 show_temp, NULL, offset - 1); \ 459 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 460 show_temp_max, set_temp_max, offset - 1); \ 461 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 462 show_temp_min, set_temp_min, offset - 1); 463 464 show_temp_offset(1); 465 show_temp_offset(2); 466 show_temp_offset(3); 467 468 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, 469 char *buf) 470 { 471 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 472 int nr = sensor_attr->index; 473 474 struct it87_data *data = it87_update_device(dev); 475 u8 reg = data->sensor; /* In case the value is updated while we use it */ 476 477 if (reg & (1 << nr)) 478 return sprintf(buf, "3\n"); /* thermal diode */ 479 if (reg & (8 << nr)) 480 return sprintf(buf, "2\n"); /* thermistor */ 481 return sprintf(buf, "0\n"); /* disabled */ 482 } 483 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, 484 const char *buf, size_t count) 485 { 486 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 487 int nr = sensor_attr->index; 488 489 struct it87_data *data = dev_get_drvdata(dev); 490 int val = simple_strtol(buf, NULL, 10); 491 492 mutex_lock(&data->update_lock); 493 494 data->sensor &= ~(1 << nr); 495 data->sensor &= ~(8 << nr); 496 /* 3 = thermal diode; 2 = thermistor; 0 = disabled */ 497 if (val == 3) 498 data->sensor |= 1 << nr; 499 else if (val == 2) 500 data->sensor |= 8 << nr; 501 else if (val != 0) { 502 mutex_unlock(&data->update_lock); 503 return -EINVAL; 504 } 505 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor); 506 mutex_unlock(&data->update_lock); 507 return count; 508 } 509 #define show_sensor_offset(offset) \ 510 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ 511 show_sensor, set_sensor, offset - 1); 512 513 show_sensor_offset(1); 514 show_sensor_offset(2); 515 show_sensor_offset(3); 516 517 /* 3 Fans */ 518 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 519 char *buf) 520 { 521 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 522 int nr = sensor_attr->index; 523 524 struct it87_data *data = it87_update_device(dev); 525 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr], 526 DIV_FROM_REG(data->fan_div[nr]))); 527 } 528 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 529 char *buf) 530 { 531 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 532 int nr = sensor_attr->index; 533 534 struct it87_data *data = it87_update_device(dev); 535 return sprintf(buf,"%d\n", 536 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]))); 537 } 538 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 539 char *buf) 540 { 541 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 542 int nr = sensor_attr->index; 543 544 struct it87_data *data = it87_update_device(dev); 545 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 546 } 547 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr, 548 char *buf) 549 { 550 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 551 int nr = sensor_attr->index; 552 553 struct it87_data *data = it87_update_device(dev); 554 return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0); 555 } 556 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 557 char *buf) 558 { 559 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 560 int nr = sensor_attr->index; 561 562 struct it87_data *data = it87_update_device(dev); 563 return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]); 564 } 565 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr, 566 char *buf) 567 { 568 struct it87_data *data = it87_update_device(dev); 569 int index = (data->fan_ctl >> 4) & 0x07; 570 571 return sprintf(buf, "%u\n", pwm_freq[index]); 572 } 573 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 574 const char *buf, size_t count) 575 { 576 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 577 int nr = sensor_attr->index; 578 579 struct it87_data *data = dev_get_drvdata(dev); 580 int val = simple_strtol(buf, NULL, 10); 581 u8 reg; 582 583 mutex_lock(&data->update_lock); 584 reg = it87_read_value(data, IT87_REG_FAN_DIV); 585 switch (nr) { 586 case 0: data->fan_div[nr] = reg & 0x07; break; 587 case 1: data->fan_div[nr] = (reg >> 3) & 0x07; break; 588 case 2: data->fan_div[nr] = (reg & 0x40) ? 3 : 1; break; 589 } 590 591 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 592 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 593 mutex_unlock(&data->update_lock); 594 return count; 595 } 596 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 597 const char *buf, size_t count) 598 { 599 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 600 int nr = sensor_attr->index; 601 602 struct it87_data *data = dev_get_drvdata(dev); 603 unsigned long val = simple_strtoul(buf, NULL, 10); 604 int min; 605 u8 old; 606 607 mutex_lock(&data->update_lock); 608 old = it87_read_value(data, IT87_REG_FAN_DIV); 609 610 /* Save fan min limit */ 611 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 612 613 switch (nr) { 614 case 0: 615 case 1: 616 data->fan_div[nr] = DIV_TO_REG(val); 617 break; 618 case 2: 619 if (val < 8) 620 data->fan_div[nr] = 1; 621 else 622 data->fan_div[nr] = 3; 623 } 624 val = old & 0x80; 625 val |= (data->fan_div[0] & 0x07); 626 val |= (data->fan_div[1] & 0x07) << 3; 627 if (data->fan_div[2] == 3) 628 val |= 0x1 << 6; 629 it87_write_value(data, IT87_REG_FAN_DIV, val); 630 631 /* Restore fan min limit */ 632 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 633 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 634 635 mutex_unlock(&data->update_lock); 636 return count; 637 } 638 static ssize_t set_pwm_enable(struct device *dev, 639 struct device_attribute *attr, const char *buf, size_t count) 640 { 641 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 642 int nr = sensor_attr->index; 643 644 struct it87_data *data = dev_get_drvdata(dev); 645 int val = simple_strtol(buf, NULL, 10); 646 647 mutex_lock(&data->update_lock); 648 649 if (val == 0) { 650 int tmp; 651 /* make sure the fan is on when in on/off mode */ 652 tmp = it87_read_value(data, IT87_REG_FAN_CTL); 653 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr)); 654 /* set on/off mode */ 655 data->fan_main_ctrl &= ~(1 << nr); 656 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 657 } else if (val == 1) { 658 /* set SmartGuardian mode */ 659 data->fan_main_ctrl |= (1 << nr); 660 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 661 /* set saved pwm value, clear FAN_CTLX PWM mode bit */ 662 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); 663 } else { 664 mutex_unlock(&data->update_lock); 665 return -EINVAL; 666 } 667 668 mutex_unlock(&data->update_lock); 669 return count; 670 } 671 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 672 const char *buf, size_t count) 673 { 674 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 675 int nr = sensor_attr->index; 676 677 struct it87_data *data = dev_get_drvdata(dev); 678 int val = simple_strtol(buf, NULL, 10); 679 680 if (val < 0 || val > 255) 681 return -EINVAL; 682 683 mutex_lock(&data->update_lock); 684 data->manual_pwm_ctl[nr] = val; 685 if (data->fan_main_ctrl & (1 << nr)) 686 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); 687 mutex_unlock(&data->update_lock); 688 return count; 689 } 690 static ssize_t set_pwm_freq(struct device *dev, 691 struct device_attribute *attr, const char *buf, size_t count) 692 { 693 struct it87_data *data = dev_get_drvdata(dev); 694 unsigned long val = simple_strtoul(buf, NULL, 10); 695 int i; 696 697 /* Search for the nearest available frequency */ 698 for (i = 0; i < 7; i++) { 699 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2) 700 break; 701 } 702 703 mutex_lock(&data->update_lock); 704 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f; 705 data->fan_ctl |= i << 4; 706 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl); 707 mutex_unlock(&data->update_lock); 708 709 return count; 710 } 711 712 #define show_fan_offset(offset) \ 713 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 714 show_fan, NULL, offset - 1); \ 715 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 716 show_fan_min, set_fan_min, offset - 1); \ 717 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 718 show_fan_div, set_fan_div, offset - 1); 719 720 show_fan_offset(1); 721 show_fan_offset(2); 722 show_fan_offset(3); 723 724 #define show_pwm_offset(offset) \ 725 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 726 show_pwm_enable, set_pwm_enable, offset - 1); \ 727 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 728 show_pwm, set_pwm, offset - 1); \ 729 static DEVICE_ATTR(pwm##offset##_freq, \ 730 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \ 731 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); 732 733 show_pwm_offset(1); 734 show_pwm_offset(2); 735 show_pwm_offset(3); 736 737 /* A different set of callbacks for 16-bit fans */ 738 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr, 739 char *buf) 740 { 741 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 742 int nr = sensor_attr->index; 743 struct it87_data *data = it87_update_device(dev); 744 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr])); 745 } 746 747 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr, 748 char *buf) 749 { 750 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 751 int nr = sensor_attr->index; 752 struct it87_data *data = it87_update_device(dev); 753 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr])); 754 } 755 756 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr, 757 const char *buf, size_t count) 758 { 759 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 760 int nr = sensor_attr->index; 761 struct it87_data *data = dev_get_drvdata(dev); 762 int val = simple_strtol(buf, NULL, 10); 763 764 mutex_lock(&data->update_lock); 765 data->fan_min[nr] = FAN16_TO_REG(val); 766 it87_write_value(data, IT87_REG_FAN_MIN[nr], 767 data->fan_min[nr] & 0xff); 768 it87_write_value(data, IT87_REG_FANX_MIN[nr], 769 data->fan_min[nr] >> 8); 770 mutex_unlock(&data->update_lock); 771 return count; 772 } 773 774 /* We want to use the same sysfs file names as 8-bit fans, but we need 775 different variable names, so we have to use SENSOR_ATTR instead of 776 SENSOR_DEVICE_ATTR. */ 777 #define show_fan16_offset(offset) \ 778 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \ 779 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \ 780 show_fan16, NULL, offset - 1); \ 781 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \ 782 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 783 show_fan16_min, set_fan16_min, offset - 1) 784 785 show_fan16_offset(1); 786 show_fan16_offset(2); 787 show_fan16_offset(3); 788 show_fan16_offset(4); 789 show_fan16_offset(5); 790 791 /* Alarms */ 792 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 793 { 794 struct it87_data *data = it87_update_device(dev); 795 return sprintf(buf, "%u\n", data->alarms); 796 } 797 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 798 799 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 800 char *buf) 801 { 802 int bitnr = to_sensor_dev_attr(attr)->index; 803 struct it87_data *data = it87_update_device(dev); 804 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 805 } 806 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8); 807 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9); 808 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10); 809 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11); 810 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12); 811 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13); 812 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14); 813 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15); 814 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0); 815 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1); 816 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2); 817 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3); 818 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6); 819 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16); 820 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17); 821 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18); 822 823 static ssize_t 824 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf) 825 { 826 struct it87_data *data = dev_get_drvdata(dev); 827 return sprintf(buf, "%u\n", data->vrm); 828 } 829 static ssize_t 830 store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 831 { 832 struct it87_data *data = dev_get_drvdata(dev); 833 u32 val; 834 835 val = simple_strtoul(buf, NULL, 10); 836 data->vrm = val; 837 838 return count; 839 } 840 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 841 842 static ssize_t 843 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf) 844 { 845 struct it87_data *data = it87_update_device(dev); 846 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 847 } 848 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 849 850 static ssize_t show_name(struct device *dev, struct device_attribute 851 *devattr, char *buf) 852 { 853 struct it87_data *data = dev_get_drvdata(dev); 854 return sprintf(buf, "%s\n", data->name); 855 } 856 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 857 858 static struct attribute *it87_attributes[] = { 859 &sensor_dev_attr_in0_input.dev_attr.attr, 860 &sensor_dev_attr_in1_input.dev_attr.attr, 861 &sensor_dev_attr_in2_input.dev_attr.attr, 862 &sensor_dev_attr_in3_input.dev_attr.attr, 863 &sensor_dev_attr_in4_input.dev_attr.attr, 864 &sensor_dev_attr_in5_input.dev_attr.attr, 865 &sensor_dev_attr_in6_input.dev_attr.attr, 866 &sensor_dev_attr_in7_input.dev_attr.attr, 867 &sensor_dev_attr_in8_input.dev_attr.attr, 868 &sensor_dev_attr_in0_min.dev_attr.attr, 869 &sensor_dev_attr_in1_min.dev_attr.attr, 870 &sensor_dev_attr_in2_min.dev_attr.attr, 871 &sensor_dev_attr_in3_min.dev_attr.attr, 872 &sensor_dev_attr_in4_min.dev_attr.attr, 873 &sensor_dev_attr_in5_min.dev_attr.attr, 874 &sensor_dev_attr_in6_min.dev_attr.attr, 875 &sensor_dev_attr_in7_min.dev_attr.attr, 876 &sensor_dev_attr_in0_max.dev_attr.attr, 877 &sensor_dev_attr_in1_max.dev_attr.attr, 878 &sensor_dev_attr_in2_max.dev_attr.attr, 879 &sensor_dev_attr_in3_max.dev_attr.attr, 880 &sensor_dev_attr_in4_max.dev_attr.attr, 881 &sensor_dev_attr_in5_max.dev_attr.attr, 882 &sensor_dev_attr_in6_max.dev_attr.attr, 883 &sensor_dev_attr_in7_max.dev_attr.attr, 884 &sensor_dev_attr_in0_alarm.dev_attr.attr, 885 &sensor_dev_attr_in1_alarm.dev_attr.attr, 886 &sensor_dev_attr_in2_alarm.dev_attr.attr, 887 &sensor_dev_attr_in3_alarm.dev_attr.attr, 888 &sensor_dev_attr_in4_alarm.dev_attr.attr, 889 &sensor_dev_attr_in5_alarm.dev_attr.attr, 890 &sensor_dev_attr_in6_alarm.dev_attr.attr, 891 &sensor_dev_attr_in7_alarm.dev_attr.attr, 892 893 &sensor_dev_attr_temp1_input.dev_attr.attr, 894 &sensor_dev_attr_temp2_input.dev_attr.attr, 895 &sensor_dev_attr_temp3_input.dev_attr.attr, 896 &sensor_dev_attr_temp1_max.dev_attr.attr, 897 &sensor_dev_attr_temp2_max.dev_attr.attr, 898 &sensor_dev_attr_temp3_max.dev_attr.attr, 899 &sensor_dev_attr_temp1_min.dev_attr.attr, 900 &sensor_dev_attr_temp2_min.dev_attr.attr, 901 &sensor_dev_attr_temp3_min.dev_attr.attr, 902 &sensor_dev_attr_temp1_type.dev_attr.attr, 903 &sensor_dev_attr_temp2_type.dev_attr.attr, 904 &sensor_dev_attr_temp3_type.dev_attr.attr, 905 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 906 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 907 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 908 909 &dev_attr_alarms.attr, 910 &dev_attr_name.attr, 911 NULL 912 }; 913 914 static const struct attribute_group it87_group = { 915 .attrs = it87_attributes, 916 }; 917 918 static struct attribute *it87_attributes_opt[] = { 919 &sensor_dev_attr_fan1_input16.dev_attr.attr, 920 &sensor_dev_attr_fan1_min16.dev_attr.attr, 921 &sensor_dev_attr_fan2_input16.dev_attr.attr, 922 &sensor_dev_attr_fan2_min16.dev_attr.attr, 923 &sensor_dev_attr_fan3_input16.dev_attr.attr, 924 &sensor_dev_attr_fan3_min16.dev_attr.attr, 925 &sensor_dev_attr_fan4_input16.dev_attr.attr, 926 &sensor_dev_attr_fan4_min16.dev_attr.attr, 927 &sensor_dev_attr_fan5_input16.dev_attr.attr, 928 &sensor_dev_attr_fan5_min16.dev_attr.attr, 929 930 &sensor_dev_attr_fan1_input.dev_attr.attr, 931 &sensor_dev_attr_fan1_min.dev_attr.attr, 932 &sensor_dev_attr_fan1_div.dev_attr.attr, 933 &sensor_dev_attr_fan2_input.dev_attr.attr, 934 &sensor_dev_attr_fan2_min.dev_attr.attr, 935 &sensor_dev_attr_fan2_div.dev_attr.attr, 936 &sensor_dev_attr_fan3_input.dev_attr.attr, 937 &sensor_dev_attr_fan3_min.dev_attr.attr, 938 &sensor_dev_attr_fan3_div.dev_attr.attr, 939 940 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 941 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 942 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 943 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 944 &sensor_dev_attr_fan5_alarm.dev_attr.attr, 945 946 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 947 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 948 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 949 &sensor_dev_attr_pwm1.dev_attr.attr, 950 &sensor_dev_attr_pwm2.dev_attr.attr, 951 &sensor_dev_attr_pwm3.dev_attr.attr, 952 &dev_attr_pwm1_freq.attr, 953 &dev_attr_pwm2_freq.attr, 954 &dev_attr_pwm3_freq.attr, 955 956 &dev_attr_vrm.attr, 957 &dev_attr_cpu0_vid.attr, 958 NULL 959 }; 960 961 static const struct attribute_group it87_group_opt = { 962 .attrs = it87_attributes_opt, 963 }; 964 965 /* SuperIO detection - will change isa_address if a chip is found */ 966 static int __init it87_find(unsigned short *address, 967 struct it87_sio_data *sio_data) 968 { 969 int err = -ENODEV; 970 u16 chip_type; 971 const char *board_vendor, *board_name; 972 973 superio_enter(); 974 chip_type = force_id ? force_id : superio_inw(DEVID); 975 976 switch (chip_type) { 977 case IT8705F_DEVID: 978 sio_data->type = it87; 979 break; 980 case IT8712F_DEVID: 981 sio_data->type = it8712; 982 break; 983 case IT8716F_DEVID: 984 case IT8726F_DEVID: 985 sio_data->type = it8716; 986 break; 987 case IT8718F_DEVID: 988 sio_data->type = it8718; 989 break; 990 case 0xffff: /* No device at all */ 991 goto exit; 992 default: 993 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n", 994 chip_type); 995 goto exit; 996 } 997 998 superio_select(PME); 999 if (!(superio_inb(IT87_ACT_REG) & 0x01)) { 1000 pr_info("it87: Device not activated, skipping\n"); 1001 goto exit; 1002 } 1003 1004 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); 1005 if (*address == 0) { 1006 pr_info("it87: Base address not set, skipping\n"); 1007 goto exit; 1008 } 1009 1010 err = 0; 1011 sio_data->revision = superio_inb(DEVREV) & 0x0f; 1012 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n", 1013 chip_type, *address, sio_data->revision); 1014 1015 /* Read GPIO config and VID value from LDN 7 (GPIO) */ 1016 if (chip_type != IT8705F_DEVID) { 1017 int reg; 1018 1019 superio_select(GPIO); 1020 if (chip_type == it8718) 1021 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG); 1022 1023 reg = superio_inb(IT87_SIO_PINX2_REG); 1024 if (reg & (1 << 0)) 1025 pr_info("it87: in3 is VCC (+5V)\n"); 1026 if (reg & (1 << 1)) 1027 pr_info("it87: in7 is VCCH (+5V Stand-By)\n"); 1028 } 1029 1030 /* Disable specific features based on DMI strings */ 1031 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR); 1032 board_name = dmi_get_system_info(DMI_BOARD_NAME); 1033 if (board_vendor && board_name) { 1034 if (strcmp(board_vendor, "nVIDIA") == 0 1035 && strcmp(board_name, "FN68PT") == 0) { 1036 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not 1037 connected to a fan, but to something else. One user 1038 has reported instant system power-off when changing 1039 the PWM2 duty cycle, so we disable it. 1040 I use the board name string as the trigger in case 1041 the same board is ever used in other systems. */ 1042 pr_info("it87: Disabling pwm2 due to " 1043 "hardware constraints\n"); 1044 sio_data->skip_pwm = (1 << 1); 1045 } 1046 } 1047 1048 exit: 1049 superio_exit(); 1050 return err; 1051 } 1052 1053 static int __devinit it87_probe(struct platform_device *pdev) 1054 { 1055 struct it87_data *data; 1056 struct resource *res; 1057 struct device *dev = &pdev->dev; 1058 struct it87_sio_data *sio_data = dev->platform_data; 1059 int err = 0; 1060 int enable_pwm_interface; 1061 static const char *names[] = { 1062 "it87", 1063 "it8712", 1064 "it8716", 1065 "it8718", 1066 }; 1067 1068 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1069 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) { 1070 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", 1071 (unsigned long)res->start, 1072 (unsigned long)(res->start + IT87_EC_EXTENT - 1)); 1073 err = -EBUSY; 1074 goto ERROR0; 1075 } 1076 1077 if (!(data = kzalloc(sizeof(struct it87_data), GFP_KERNEL))) { 1078 err = -ENOMEM; 1079 goto ERROR1; 1080 } 1081 1082 data->addr = res->start; 1083 data->type = sio_data->type; 1084 data->revision = sio_data->revision; 1085 data->name = names[sio_data->type]; 1086 1087 /* Now, we do the remaining detection. */ 1088 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80) 1089 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) { 1090 err = -ENODEV; 1091 goto ERROR2; 1092 } 1093 1094 platform_set_drvdata(pdev, data); 1095 1096 mutex_init(&data->update_lock); 1097 1098 /* Check PWM configuration */ 1099 enable_pwm_interface = it87_check_pwm(dev); 1100 1101 /* Initialize the IT87 chip */ 1102 it87_init_device(pdev); 1103 1104 /* Register sysfs hooks */ 1105 if ((err = sysfs_create_group(&dev->kobj, &it87_group))) 1106 goto ERROR2; 1107 1108 /* Do not create fan files for disabled fans */ 1109 if (has_16bit_fans(data)) { 1110 /* 16-bit tachometers */ 1111 if (data->has_fan & (1 << 0)) { 1112 if ((err = device_create_file(dev, 1113 &sensor_dev_attr_fan1_input16.dev_attr)) 1114 || (err = device_create_file(dev, 1115 &sensor_dev_attr_fan1_min16.dev_attr)) 1116 || (err = device_create_file(dev, 1117 &sensor_dev_attr_fan1_alarm.dev_attr))) 1118 goto ERROR4; 1119 } 1120 if (data->has_fan & (1 << 1)) { 1121 if ((err = device_create_file(dev, 1122 &sensor_dev_attr_fan2_input16.dev_attr)) 1123 || (err = device_create_file(dev, 1124 &sensor_dev_attr_fan2_min16.dev_attr)) 1125 || (err = device_create_file(dev, 1126 &sensor_dev_attr_fan2_alarm.dev_attr))) 1127 goto ERROR4; 1128 } 1129 if (data->has_fan & (1 << 2)) { 1130 if ((err = device_create_file(dev, 1131 &sensor_dev_attr_fan3_input16.dev_attr)) 1132 || (err = device_create_file(dev, 1133 &sensor_dev_attr_fan3_min16.dev_attr)) 1134 || (err = device_create_file(dev, 1135 &sensor_dev_attr_fan3_alarm.dev_attr))) 1136 goto ERROR4; 1137 } 1138 if (data->has_fan & (1 << 3)) { 1139 if ((err = device_create_file(dev, 1140 &sensor_dev_attr_fan4_input16.dev_attr)) 1141 || (err = device_create_file(dev, 1142 &sensor_dev_attr_fan4_min16.dev_attr)) 1143 || (err = device_create_file(dev, 1144 &sensor_dev_attr_fan4_alarm.dev_attr))) 1145 goto ERROR4; 1146 } 1147 if (data->has_fan & (1 << 4)) { 1148 if ((err = device_create_file(dev, 1149 &sensor_dev_attr_fan5_input16.dev_attr)) 1150 || (err = device_create_file(dev, 1151 &sensor_dev_attr_fan5_min16.dev_attr)) 1152 || (err = device_create_file(dev, 1153 &sensor_dev_attr_fan5_alarm.dev_attr))) 1154 goto ERROR4; 1155 } 1156 } else { 1157 /* 8-bit tachometers with clock divider */ 1158 if (data->has_fan & (1 << 0)) { 1159 if ((err = device_create_file(dev, 1160 &sensor_dev_attr_fan1_input.dev_attr)) 1161 || (err = device_create_file(dev, 1162 &sensor_dev_attr_fan1_min.dev_attr)) 1163 || (err = device_create_file(dev, 1164 &sensor_dev_attr_fan1_div.dev_attr)) 1165 || (err = device_create_file(dev, 1166 &sensor_dev_attr_fan1_alarm.dev_attr))) 1167 goto ERROR4; 1168 } 1169 if (data->has_fan & (1 << 1)) { 1170 if ((err = device_create_file(dev, 1171 &sensor_dev_attr_fan2_input.dev_attr)) 1172 || (err = device_create_file(dev, 1173 &sensor_dev_attr_fan2_min.dev_attr)) 1174 || (err = device_create_file(dev, 1175 &sensor_dev_attr_fan2_div.dev_attr)) 1176 || (err = device_create_file(dev, 1177 &sensor_dev_attr_fan2_alarm.dev_attr))) 1178 goto ERROR4; 1179 } 1180 if (data->has_fan & (1 << 2)) { 1181 if ((err = device_create_file(dev, 1182 &sensor_dev_attr_fan3_input.dev_attr)) 1183 || (err = device_create_file(dev, 1184 &sensor_dev_attr_fan3_min.dev_attr)) 1185 || (err = device_create_file(dev, 1186 &sensor_dev_attr_fan3_div.dev_attr)) 1187 || (err = device_create_file(dev, 1188 &sensor_dev_attr_fan3_alarm.dev_attr))) 1189 goto ERROR4; 1190 } 1191 } 1192 1193 if (enable_pwm_interface) { 1194 if (!(sio_data->skip_pwm & (1 << 0))) { 1195 if ((err = device_create_file(dev, 1196 &sensor_dev_attr_pwm1_enable.dev_attr)) 1197 || (err = device_create_file(dev, 1198 &sensor_dev_attr_pwm1.dev_attr)) 1199 || (err = device_create_file(dev, 1200 &dev_attr_pwm1_freq))) 1201 goto ERROR4; 1202 } 1203 if (!(sio_data->skip_pwm & (1 << 1))) { 1204 if ((err = device_create_file(dev, 1205 &sensor_dev_attr_pwm2_enable.dev_attr)) 1206 || (err = device_create_file(dev, 1207 &sensor_dev_attr_pwm2.dev_attr)) 1208 || (err = device_create_file(dev, 1209 &dev_attr_pwm2_freq))) 1210 goto ERROR4; 1211 } 1212 if (!(sio_data->skip_pwm & (1 << 2))) { 1213 if ((err = device_create_file(dev, 1214 &sensor_dev_attr_pwm3_enable.dev_attr)) 1215 || (err = device_create_file(dev, 1216 &sensor_dev_attr_pwm3.dev_attr)) 1217 || (err = device_create_file(dev, 1218 &dev_attr_pwm3_freq))) 1219 goto ERROR4; 1220 } 1221 } 1222 1223 if (data->type == it8712 || data->type == it8716 1224 || data->type == it8718) { 1225 data->vrm = vid_which_vrm(); 1226 /* VID reading from Super-I/O config space if available */ 1227 data->vid = sio_data->vid_value; 1228 if ((err = device_create_file(dev, 1229 &dev_attr_vrm)) 1230 || (err = device_create_file(dev, 1231 &dev_attr_cpu0_vid))) 1232 goto ERROR4; 1233 } 1234 1235 data->hwmon_dev = hwmon_device_register(dev); 1236 if (IS_ERR(data->hwmon_dev)) { 1237 err = PTR_ERR(data->hwmon_dev); 1238 goto ERROR4; 1239 } 1240 1241 return 0; 1242 1243 ERROR4: 1244 sysfs_remove_group(&dev->kobj, &it87_group); 1245 sysfs_remove_group(&dev->kobj, &it87_group_opt); 1246 ERROR2: 1247 platform_set_drvdata(pdev, NULL); 1248 kfree(data); 1249 ERROR1: 1250 release_region(res->start, IT87_EC_EXTENT); 1251 ERROR0: 1252 return err; 1253 } 1254 1255 static int __devexit it87_remove(struct platform_device *pdev) 1256 { 1257 struct it87_data *data = platform_get_drvdata(pdev); 1258 1259 hwmon_device_unregister(data->hwmon_dev); 1260 sysfs_remove_group(&pdev->dev.kobj, &it87_group); 1261 sysfs_remove_group(&pdev->dev.kobj, &it87_group_opt); 1262 1263 release_region(data->addr, IT87_EC_EXTENT); 1264 platform_set_drvdata(pdev, NULL); 1265 kfree(data); 1266 1267 return 0; 1268 } 1269 1270 /* Must be called with data->update_lock held, except during initialization. 1271 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1272 would slow down the IT87 access and should not be necessary. */ 1273 static int it87_read_value(struct it87_data *data, u8 reg) 1274 { 1275 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1276 return inb_p(data->addr + IT87_DATA_REG_OFFSET); 1277 } 1278 1279 /* Must be called with data->update_lock held, except during initialization. 1280 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1281 would slow down the IT87 access and should not be necessary. */ 1282 static void it87_write_value(struct it87_data *data, u8 reg, u8 value) 1283 { 1284 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1285 outb_p(value, data->addr + IT87_DATA_REG_OFFSET); 1286 } 1287 1288 /* Return 1 if and only if the PWM interface is safe to use */ 1289 static int __devinit it87_check_pwm(struct device *dev) 1290 { 1291 struct it87_data *data = dev_get_drvdata(dev); 1292 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off 1293 * and polarity set to active low is sign that this is the case so we 1294 * disable pwm control to protect the user. */ 1295 int tmp = it87_read_value(data, IT87_REG_FAN_CTL); 1296 if ((tmp & 0x87) == 0) { 1297 if (fix_pwm_polarity) { 1298 /* The user asks us to attempt a chip reconfiguration. 1299 * This means switching to active high polarity and 1300 * inverting all fan speed values. */ 1301 int i; 1302 u8 pwm[3]; 1303 1304 for (i = 0; i < 3; i++) 1305 pwm[i] = it87_read_value(data, 1306 IT87_REG_PWM(i)); 1307 1308 /* If any fan is in automatic pwm mode, the polarity 1309 * might be correct, as suspicious as it seems, so we 1310 * better don't change anything (but still disable the 1311 * PWM interface). */ 1312 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) { 1313 dev_info(dev, "Reconfiguring PWM to " 1314 "active high polarity\n"); 1315 it87_write_value(data, IT87_REG_FAN_CTL, 1316 tmp | 0x87); 1317 for (i = 0; i < 3; i++) 1318 it87_write_value(data, 1319 IT87_REG_PWM(i), 1320 0x7f & ~pwm[i]); 1321 return 1; 1322 } 1323 1324 dev_info(dev, "PWM configuration is " 1325 "too broken to be fixed\n"); 1326 } 1327 1328 dev_info(dev, "Detected broken BIOS " 1329 "defaults, disabling PWM interface\n"); 1330 return 0; 1331 } else if (fix_pwm_polarity) { 1332 dev_info(dev, "PWM configuration looks " 1333 "sane, won't touch\n"); 1334 } 1335 1336 return 1; 1337 } 1338 1339 /* Called when we have found a new IT87. */ 1340 static void __devinit it87_init_device(struct platform_device *pdev) 1341 { 1342 struct it87_data *data = platform_get_drvdata(pdev); 1343 int tmp, i; 1344 1345 /* initialize to sane defaults: 1346 * - if the chip is in manual pwm mode, this will be overwritten with 1347 * the actual settings on the chip (so in this case, initialization 1348 * is not needed) 1349 * - if in automatic or on/off mode, we could switch to manual mode, 1350 * read the registers and set manual_pwm_ctl accordingly, but currently 1351 * this is not implemented, so we initialize to something sane */ 1352 for (i = 0; i < 3; i++) { 1353 data->manual_pwm_ctl[i] = 0xff; 1354 } 1355 1356 /* Some chips seem to have default value 0xff for all limit 1357 * registers. For low voltage limits it makes no sense and triggers 1358 * alarms, so change to 0 instead. For high temperature limits, it 1359 * means -1 degree C, which surprisingly doesn't trigger an alarm, 1360 * but is still confusing, so change to 127 degrees C. */ 1361 for (i = 0; i < 8; i++) { 1362 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i)); 1363 if (tmp == 0xff) 1364 it87_write_value(data, IT87_REG_VIN_MIN(i), 0); 1365 } 1366 for (i = 0; i < 3; i++) { 1367 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1368 if (tmp == 0xff) 1369 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127); 1370 } 1371 1372 /* Check if temperature channnels are reset manually or by some reason */ 1373 tmp = it87_read_value(data, IT87_REG_TEMP_ENABLE); 1374 if ((tmp & 0x3f) == 0) { 1375 /* Temp1,Temp3=thermistor; Temp2=thermal diode */ 1376 tmp = (tmp & 0xc0) | 0x2a; 1377 it87_write_value(data, IT87_REG_TEMP_ENABLE, tmp); 1378 } 1379 data->sensor = tmp; 1380 1381 /* Check if voltage monitors are reset manually or by some reason */ 1382 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE); 1383 if ((tmp & 0xff) == 0) { 1384 /* Enable all voltage monitors */ 1385 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff); 1386 } 1387 1388 /* Check if tachometers are reset manually or by some reason */ 1389 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL); 1390 if ((data->fan_main_ctrl & 0x70) == 0) { 1391 /* Enable all fan tachometers */ 1392 data->fan_main_ctrl |= 0x70; 1393 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 1394 } 1395 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07; 1396 1397 /* Set tachometers to 16-bit mode if needed */ 1398 if (has_16bit_fans(data)) { 1399 tmp = it87_read_value(data, IT87_REG_FAN_16BIT); 1400 if (~tmp & 0x07 & data->has_fan) { 1401 dev_dbg(&pdev->dev, 1402 "Setting fan1-3 to 16-bit mode\n"); 1403 it87_write_value(data, IT87_REG_FAN_16BIT, 1404 tmp | 0x07); 1405 } 1406 /* IT8705F only supports three fans. */ 1407 if (data->type != it87) { 1408 if (tmp & (1 << 4)) 1409 data->has_fan |= (1 << 3); /* fan4 enabled */ 1410 if (tmp & (1 << 5)) 1411 data->has_fan |= (1 << 4); /* fan5 enabled */ 1412 } 1413 } 1414 1415 /* Set current fan mode registers and the default settings for the 1416 * other mode registers */ 1417 for (i = 0; i < 3; i++) { 1418 if (data->fan_main_ctrl & (1 << i)) { 1419 /* pwm mode */ 1420 tmp = it87_read_value(data, IT87_REG_PWM(i)); 1421 if (tmp & 0x80) { 1422 /* automatic pwm - not yet implemented, but 1423 * leave the settings made by the BIOS alone 1424 * until a change is requested via the sysfs 1425 * interface */ 1426 } else { 1427 /* manual pwm */ 1428 data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp); 1429 } 1430 } 1431 } 1432 1433 /* Start monitoring */ 1434 it87_write_value(data, IT87_REG_CONFIG, 1435 (it87_read_value(data, IT87_REG_CONFIG) & 0x36) 1436 | (update_vbat ? 0x41 : 0x01)); 1437 } 1438 1439 static struct it87_data *it87_update_device(struct device *dev) 1440 { 1441 struct it87_data *data = dev_get_drvdata(dev); 1442 int i; 1443 1444 mutex_lock(&data->update_lock); 1445 1446 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 1447 || !data->valid) { 1448 1449 if (update_vbat) { 1450 /* Cleared after each update, so reenable. Value 1451 returned by this read will be previous value */ 1452 it87_write_value(data, IT87_REG_CONFIG, 1453 it87_read_value(data, IT87_REG_CONFIG) | 0x40); 1454 } 1455 for (i = 0; i <= 7; i++) { 1456 data->in[i] = 1457 it87_read_value(data, IT87_REG_VIN(i)); 1458 data->in_min[i] = 1459 it87_read_value(data, IT87_REG_VIN_MIN(i)); 1460 data->in_max[i] = 1461 it87_read_value(data, IT87_REG_VIN_MAX(i)); 1462 } 1463 /* in8 (battery) has no limit registers */ 1464 data->in[8] = 1465 it87_read_value(data, IT87_REG_VIN(8)); 1466 1467 for (i = 0; i < 5; i++) { 1468 /* Skip disabled fans */ 1469 if (!(data->has_fan & (1 << i))) 1470 continue; 1471 1472 data->fan_min[i] = 1473 it87_read_value(data, IT87_REG_FAN_MIN[i]); 1474 data->fan[i] = it87_read_value(data, 1475 IT87_REG_FAN[i]); 1476 /* Add high byte if in 16-bit mode */ 1477 if (has_16bit_fans(data)) { 1478 data->fan[i] |= it87_read_value(data, 1479 IT87_REG_FANX[i]) << 8; 1480 data->fan_min[i] |= it87_read_value(data, 1481 IT87_REG_FANX_MIN[i]) << 8; 1482 } 1483 } 1484 for (i = 0; i < 3; i++) { 1485 data->temp[i] = 1486 it87_read_value(data, IT87_REG_TEMP(i)); 1487 data->temp_high[i] = 1488 it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1489 data->temp_low[i] = 1490 it87_read_value(data, IT87_REG_TEMP_LOW(i)); 1491 } 1492 1493 /* Newer chips don't have clock dividers */ 1494 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) { 1495 i = it87_read_value(data, IT87_REG_FAN_DIV); 1496 data->fan_div[0] = i & 0x07; 1497 data->fan_div[1] = (i >> 3) & 0x07; 1498 data->fan_div[2] = (i & 0x40) ? 3 : 1; 1499 } 1500 1501 data->alarms = 1502 it87_read_value(data, IT87_REG_ALARM1) | 1503 (it87_read_value(data, IT87_REG_ALARM2) << 8) | 1504 (it87_read_value(data, IT87_REG_ALARM3) << 16); 1505 data->fan_main_ctrl = it87_read_value(data, 1506 IT87_REG_FAN_MAIN_CTRL); 1507 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL); 1508 1509 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE); 1510 /* The 8705 does not have VID capability. 1511 The 8718 does not use IT87_REG_VID for the same purpose. */ 1512 if (data->type == it8712 || data->type == it8716) { 1513 data->vid = it87_read_value(data, IT87_REG_VID); 1514 /* The older IT8712F revisions had only 5 VID pins, 1515 but we assume it is always safe to read 6 bits. */ 1516 data->vid &= 0x3f; 1517 } 1518 data->last_updated = jiffies; 1519 data->valid = 1; 1520 } 1521 1522 mutex_unlock(&data->update_lock); 1523 1524 return data; 1525 } 1526 1527 static int __init it87_device_add(unsigned short address, 1528 const struct it87_sio_data *sio_data) 1529 { 1530 struct resource res = { 1531 .start = address + IT87_EC_OFFSET, 1532 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1, 1533 .name = DRVNAME, 1534 .flags = IORESOURCE_IO, 1535 }; 1536 int err; 1537 1538 pdev = platform_device_alloc(DRVNAME, address); 1539 if (!pdev) { 1540 err = -ENOMEM; 1541 printk(KERN_ERR DRVNAME ": Device allocation failed\n"); 1542 goto exit; 1543 } 1544 1545 err = platform_device_add_resources(pdev, &res, 1); 1546 if (err) { 1547 printk(KERN_ERR DRVNAME ": Device resource addition failed " 1548 "(%d)\n", err); 1549 goto exit_device_put; 1550 } 1551 1552 err = platform_device_add_data(pdev, sio_data, 1553 sizeof(struct it87_sio_data)); 1554 if (err) { 1555 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n"); 1556 goto exit_device_put; 1557 } 1558 1559 err = platform_device_add(pdev); 1560 if (err) { 1561 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", 1562 err); 1563 goto exit_device_put; 1564 } 1565 1566 return 0; 1567 1568 exit_device_put: 1569 platform_device_put(pdev); 1570 exit: 1571 return err; 1572 } 1573 1574 static int __init sm_it87_init(void) 1575 { 1576 int err; 1577 unsigned short isa_address=0; 1578 struct it87_sio_data sio_data; 1579 1580 memset(&sio_data, 0, sizeof(struct it87_sio_data)); 1581 err = it87_find(&isa_address, &sio_data); 1582 if (err) 1583 return err; 1584 err = platform_driver_register(&it87_driver); 1585 if (err) 1586 return err; 1587 1588 err = it87_device_add(isa_address, &sio_data); 1589 if (err){ 1590 platform_driver_unregister(&it87_driver); 1591 return err; 1592 } 1593 1594 return 0; 1595 } 1596 1597 static void __exit sm_it87_exit(void) 1598 { 1599 platform_device_unregister(pdev); 1600 platform_driver_unregister(&it87_driver); 1601 } 1602 1603 1604 MODULE_AUTHOR("Chris Gauthron, " 1605 "Jean Delvare <khali@linux-fr.org>"); 1606 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8726F, SiS950 driver"); 1607 module_param(update_vbat, bool, 0); 1608 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); 1609 module_param(fix_pwm_polarity, bool, 0); 1610 MODULE_PARM_DESC(fix_pwm_polarity, "Force PWM polarity to active high (DANGEROUS)"); 1611 MODULE_LICENSE("GPL"); 1612 1613 module_init(sm_it87_init); 1614 module_exit(sm_it87_exit); 1615