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 <chrisg@0-in.com> 21 Copyright (C) 2005-2006 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 <asm/io.h> 50 51 #define DRVNAME "it87" 52 53 enum chips { it87, it8712, it8716, it8718 }; 54 55 static struct platform_device *pdev; 56 57 #define REG 0x2e /* The register to read/write */ 58 #define DEV 0x07 /* Register: Logical device select */ 59 #define VAL 0x2f /* The value to read/write */ 60 #define PME 0x04 /* The device with the fan registers in it */ 61 #define GPIO 0x07 /* The device with the IT8718F VID value in it */ 62 #define DEVID 0x20 /* Register: Device ID */ 63 #define DEVREV 0x22 /* Register: Device Revision */ 64 65 static inline int 66 superio_inb(int reg) 67 { 68 outb(reg, REG); 69 return inb(VAL); 70 } 71 72 static int superio_inw(int reg) 73 { 74 int val; 75 outb(reg++, REG); 76 val = inb(VAL) << 8; 77 outb(reg, REG); 78 val |= inb(VAL); 79 return val; 80 } 81 82 static inline void 83 superio_select(int ldn) 84 { 85 outb(DEV, REG); 86 outb(ldn, VAL); 87 } 88 89 static inline void 90 superio_enter(void) 91 { 92 outb(0x87, REG); 93 outb(0x01, REG); 94 outb(0x55, REG); 95 outb(0x55, REG); 96 } 97 98 static inline void 99 superio_exit(void) 100 { 101 outb(0x02, REG); 102 outb(0x02, VAL); 103 } 104 105 /* Logical device 4 registers */ 106 #define IT8712F_DEVID 0x8712 107 #define IT8705F_DEVID 0x8705 108 #define IT8716F_DEVID 0x8716 109 #define IT8718F_DEVID 0x8718 110 #define IT8726F_DEVID 0x8726 111 #define IT87_ACT_REG 0x30 112 #define IT87_BASE_REG 0x60 113 114 /* Logical device 7 registers (IT8712F and later) */ 115 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */ 116 #define IT87_SIO_VID_REG 0xfc /* VID value */ 117 118 /* Update battery voltage after every reading if true */ 119 static int update_vbat; 120 121 /* Not all BIOSes properly configure the PWM registers */ 122 static int fix_pwm_polarity; 123 124 /* Many IT87 constants specified below */ 125 126 /* Length of ISA address segment */ 127 #define IT87_EXTENT 8 128 129 /* Length of ISA address segment for Environmental Controller */ 130 #define IT87_EC_EXTENT 2 131 132 /* Offset of EC registers from ISA base address */ 133 #define IT87_EC_OFFSET 5 134 135 /* Where are the ISA address/data registers relative to the EC base address */ 136 #define IT87_ADDR_REG_OFFSET 0 137 #define IT87_DATA_REG_OFFSET 1 138 139 /*----- The IT87 registers -----*/ 140 141 #define IT87_REG_CONFIG 0x00 142 143 #define IT87_REG_ALARM1 0x01 144 #define IT87_REG_ALARM2 0x02 145 #define IT87_REG_ALARM3 0x03 146 147 /* The IT8718F has the VID value in a different register, in Super-I/O 148 configuration space. */ 149 #define IT87_REG_VID 0x0a 150 /* Warning: register 0x0b is used for something completely different in 151 new chips/revisions. I suspect only 16-bit tachometer mode will work 152 for these. */ 153 #define IT87_REG_FAN_DIV 0x0b 154 #define IT87_REG_FAN_16BIT 0x0c 155 156 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */ 157 158 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 }; 159 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 }; 160 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 }; 161 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 }; 162 #define IT87_REG_FAN_MAIN_CTRL 0x13 163 #define IT87_REG_FAN_CTL 0x14 164 #define IT87_REG_PWM(nr) (0x15 + (nr)) 165 166 #define IT87_REG_VIN(nr) (0x20 + (nr)) 167 #define IT87_REG_TEMP(nr) (0x29 + (nr)) 168 169 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2) 170 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2) 171 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2) 172 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2) 173 174 #define IT87_REG_VIN_ENABLE 0x50 175 #define IT87_REG_TEMP_ENABLE 0x51 176 177 #define IT87_REG_CHIPID 0x58 178 179 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255)) 180 #define IN_FROM_REG(val) ((val) * 16) 181 182 static inline u8 FAN_TO_REG(long rpm, int div) 183 { 184 if (rpm == 0) 185 return 255; 186 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 187 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 188 254); 189 } 190 191 static inline u16 FAN16_TO_REG(long rpm) 192 { 193 if (rpm == 0) 194 return 0xffff; 195 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe); 196 } 197 198 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div))) 199 /* The divider is fixed to 2 in 16-bit mode */ 200 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2)) 201 202 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\ 203 ((val)+500)/1000),-128,127)) 204 #define TEMP_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000) 205 206 #define PWM_TO_REG(val) ((val) >> 1) 207 #define PWM_FROM_REG(val) (((val)&0x7f) << 1) 208 209 static int DIV_TO_REG(int val) 210 { 211 int answer = 0; 212 while (answer < 7 && (val >>= 1)) 213 answer++; 214 return answer; 215 } 216 #define DIV_FROM_REG(val) (1 << (val)) 217 218 static const unsigned int pwm_freq[8] = { 219 48000000 / 128, 220 24000000 / 128, 221 12000000 / 128, 222 8000000 / 128, 223 6000000 / 128, 224 3000000 / 128, 225 1500000 / 128, 226 750000 / 128, 227 }; 228 229 230 struct it87_sio_data { 231 enum chips type; 232 /* Values read from Super-I/O config space */ 233 u8 vid_value; 234 }; 235 236 /* For each registered chip, we need to keep some data in memory. 237 The structure is dynamically allocated. */ 238 struct it87_data { 239 struct device *hwmon_dev; 240 enum chips type; 241 242 unsigned short addr; 243 const char *name; 244 struct mutex update_lock; 245 char valid; /* !=0 if following fields are valid */ 246 unsigned long last_updated; /* In jiffies */ 247 248 u8 in[9]; /* Register value */ 249 u8 in_max[8]; /* Register value */ 250 u8 in_min[8]; /* Register value */ 251 u8 has_fan; /* Bitfield, fans enabled */ 252 u16 fan[5]; /* Register values, possibly combined */ 253 u16 fan_min[5]; /* Register values, possibly combined */ 254 u8 temp[3]; /* Register value */ 255 u8 temp_high[3]; /* Register value */ 256 u8 temp_low[3]; /* Register value */ 257 u8 sensor; /* Register value */ 258 u8 fan_div[3]; /* Register encoding, shifted right */ 259 u8 vid; /* Register encoding, combined */ 260 u8 vrm; 261 u32 alarms; /* Register encoding, combined */ 262 u8 fan_main_ctrl; /* Register value */ 263 u8 fan_ctl; /* Register value */ 264 u8 manual_pwm_ctl[3]; /* manual PWM value set by user */ 265 }; 266 267 268 static int it87_probe(struct platform_device *pdev); 269 static int __devexit it87_remove(struct platform_device *pdev); 270 271 static int it87_read_value(struct it87_data *data, u8 reg); 272 static void it87_write_value(struct it87_data *data, u8 reg, u8 value); 273 static struct it87_data *it87_update_device(struct device *dev); 274 static int it87_check_pwm(struct device *dev); 275 static void it87_init_device(struct platform_device *pdev); 276 277 278 static struct platform_driver it87_driver = { 279 .driver = { 280 .owner = THIS_MODULE, 281 .name = DRVNAME, 282 }, 283 .probe = it87_probe, 284 .remove = __devexit_p(it87_remove), 285 }; 286 287 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 288 char *buf) 289 { 290 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 291 int nr = sensor_attr->index; 292 293 struct it87_data *data = it87_update_device(dev); 294 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); 295 } 296 297 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 298 char *buf) 299 { 300 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 301 int nr = sensor_attr->index; 302 303 struct it87_data *data = it87_update_device(dev); 304 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); 305 } 306 307 static ssize_t show_in_max(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_max[nr])); 315 } 316 317 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 318 const char *buf, size_t count) 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 = dev_get_drvdata(dev); 324 unsigned long val = simple_strtoul(buf, NULL, 10); 325 326 mutex_lock(&data->update_lock); 327 data->in_min[nr] = IN_TO_REG(val); 328 it87_write_value(data, IT87_REG_VIN_MIN(nr), 329 data->in_min[nr]); 330 mutex_unlock(&data->update_lock); 331 return count; 332 } 333 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 334 const char *buf, size_t count) 335 { 336 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 337 int nr = sensor_attr->index; 338 339 struct it87_data *data = dev_get_drvdata(dev); 340 unsigned long val = simple_strtoul(buf, NULL, 10); 341 342 mutex_lock(&data->update_lock); 343 data->in_max[nr] = IN_TO_REG(val); 344 it87_write_value(data, IT87_REG_VIN_MAX(nr), 345 data->in_max[nr]); 346 mutex_unlock(&data->update_lock); 347 return count; 348 } 349 350 #define show_in_offset(offset) \ 351 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 352 show_in, NULL, offset); 353 354 #define limit_in_offset(offset) \ 355 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 356 show_in_min, set_in_min, offset); \ 357 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 358 show_in_max, set_in_max, offset); 359 360 show_in_offset(0); 361 limit_in_offset(0); 362 show_in_offset(1); 363 limit_in_offset(1); 364 show_in_offset(2); 365 limit_in_offset(2); 366 show_in_offset(3); 367 limit_in_offset(3); 368 show_in_offset(4); 369 limit_in_offset(4); 370 show_in_offset(5); 371 limit_in_offset(5); 372 show_in_offset(6); 373 limit_in_offset(6); 374 show_in_offset(7); 375 limit_in_offset(7); 376 show_in_offset(8); 377 378 /* 3 temperatures */ 379 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 380 char *buf) 381 { 382 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 383 int nr = sensor_attr->index; 384 385 struct it87_data *data = it87_update_device(dev); 386 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 387 } 388 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 389 char *buf) 390 { 391 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 392 int nr = sensor_attr->index; 393 394 struct it87_data *data = it87_update_device(dev); 395 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); 396 } 397 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 398 char *buf) 399 { 400 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 401 int nr = sensor_attr->index; 402 403 struct it87_data *data = it87_update_device(dev); 404 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); 405 } 406 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 407 const char *buf, size_t count) 408 { 409 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 410 int nr = sensor_attr->index; 411 412 struct it87_data *data = dev_get_drvdata(dev); 413 int val = simple_strtol(buf, NULL, 10); 414 415 mutex_lock(&data->update_lock); 416 data->temp_high[nr] = TEMP_TO_REG(val); 417 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); 418 mutex_unlock(&data->update_lock); 419 return count; 420 } 421 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 422 const char *buf, size_t count) 423 { 424 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 425 int nr = sensor_attr->index; 426 427 struct it87_data *data = dev_get_drvdata(dev); 428 int val = simple_strtol(buf, NULL, 10); 429 430 mutex_lock(&data->update_lock); 431 data->temp_low[nr] = TEMP_TO_REG(val); 432 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); 433 mutex_unlock(&data->update_lock); 434 return count; 435 } 436 #define show_temp_offset(offset) \ 437 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 438 show_temp, NULL, offset - 1); \ 439 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 440 show_temp_max, set_temp_max, offset - 1); \ 441 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 442 show_temp_min, set_temp_min, offset - 1); 443 444 show_temp_offset(1); 445 show_temp_offset(2); 446 show_temp_offset(3); 447 448 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, 449 char *buf) 450 { 451 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 452 int nr = sensor_attr->index; 453 454 struct it87_data *data = it87_update_device(dev); 455 u8 reg = data->sensor; /* In case the value is updated while we use it */ 456 457 if (reg & (1 << nr)) 458 return sprintf(buf, "3\n"); /* thermal diode */ 459 if (reg & (8 << nr)) 460 return sprintf(buf, "2\n"); /* thermistor */ 461 return sprintf(buf, "0\n"); /* disabled */ 462 } 463 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, 464 const char *buf, size_t count) 465 { 466 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 467 int nr = sensor_attr->index; 468 469 struct it87_data *data = dev_get_drvdata(dev); 470 int val = simple_strtol(buf, NULL, 10); 471 472 mutex_lock(&data->update_lock); 473 474 data->sensor &= ~(1 << nr); 475 data->sensor &= ~(8 << nr); 476 /* 3 = thermal diode; 2 = thermistor; 0 = disabled */ 477 if (val == 3) 478 data->sensor |= 1 << nr; 479 else if (val == 2) 480 data->sensor |= 8 << nr; 481 else if (val != 0) { 482 mutex_unlock(&data->update_lock); 483 return -EINVAL; 484 } 485 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor); 486 mutex_unlock(&data->update_lock); 487 return count; 488 } 489 #define show_sensor_offset(offset) \ 490 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ 491 show_sensor, set_sensor, offset - 1); 492 493 show_sensor_offset(1); 494 show_sensor_offset(2); 495 show_sensor_offset(3); 496 497 /* 3 Fans */ 498 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 499 char *buf) 500 { 501 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 502 int nr = sensor_attr->index; 503 504 struct it87_data *data = it87_update_device(dev); 505 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr], 506 DIV_FROM_REG(data->fan_div[nr]))); 507 } 508 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 509 char *buf) 510 { 511 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 512 int nr = sensor_attr->index; 513 514 struct it87_data *data = it87_update_device(dev); 515 return sprintf(buf,"%d\n", 516 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]))); 517 } 518 static ssize_t show_fan_div(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", DIV_FROM_REG(data->fan_div[nr])); 526 } 527 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr, 528 char *buf) 529 { 530 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 531 int nr = sensor_attr->index; 532 533 struct it87_data *data = it87_update_device(dev); 534 return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0); 535 } 536 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 537 char *buf) 538 { 539 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 540 int nr = sensor_attr->index; 541 542 struct it87_data *data = it87_update_device(dev); 543 return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]); 544 } 545 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr, 546 char *buf) 547 { 548 struct it87_data *data = it87_update_device(dev); 549 int index = (data->fan_ctl >> 4) & 0x07; 550 551 return sprintf(buf, "%u\n", pwm_freq[index]); 552 } 553 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 554 const char *buf, size_t count) 555 { 556 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 557 int nr = sensor_attr->index; 558 559 struct it87_data *data = dev_get_drvdata(dev); 560 int val = simple_strtol(buf, NULL, 10); 561 u8 reg; 562 563 mutex_lock(&data->update_lock); 564 reg = it87_read_value(data, IT87_REG_FAN_DIV); 565 switch (nr) { 566 case 0: data->fan_div[nr] = reg & 0x07; break; 567 case 1: data->fan_div[nr] = (reg >> 3) & 0x07; break; 568 case 2: data->fan_div[nr] = (reg & 0x40) ? 3 : 1; break; 569 } 570 571 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 572 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 573 mutex_unlock(&data->update_lock); 574 return count; 575 } 576 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 577 const char *buf, size_t count) 578 { 579 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 580 int nr = sensor_attr->index; 581 582 struct it87_data *data = dev_get_drvdata(dev); 583 unsigned long val = simple_strtoul(buf, NULL, 10); 584 int min; 585 u8 old; 586 587 mutex_lock(&data->update_lock); 588 old = it87_read_value(data, IT87_REG_FAN_DIV); 589 590 /* Save fan min limit */ 591 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 592 593 switch (nr) { 594 case 0: 595 case 1: 596 data->fan_div[nr] = DIV_TO_REG(val); 597 break; 598 case 2: 599 if (val < 8) 600 data->fan_div[nr] = 1; 601 else 602 data->fan_div[nr] = 3; 603 } 604 val = old & 0x80; 605 val |= (data->fan_div[0] & 0x07); 606 val |= (data->fan_div[1] & 0x07) << 3; 607 if (data->fan_div[2] == 3) 608 val |= 0x1 << 6; 609 it87_write_value(data, IT87_REG_FAN_DIV, val); 610 611 /* Restore fan min limit */ 612 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 613 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 614 615 mutex_unlock(&data->update_lock); 616 return count; 617 } 618 static ssize_t set_pwm_enable(struct device *dev, 619 struct device_attribute *attr, const char *buf, size_t count) 620 { 621 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 622 int nr = sensor_attr->index; 623 624 struct it87_data *data = dev_get_drvdata(dev); 625 int val = simple_strtol(buf, NULL, 10); 626 627 mutex_lock(&data->update_lock); 628 629 if (val == 0) { 630 int tmp; 631 /* make sure the fan is on when in on/off mode */ 632 tmp = it87_read_value(data, IT87_REG_FAN_CTL); 633 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr)); 634 /* set on/off mode */ 635 data->fan_main_ctrl &= ~(1 << nr); 636 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 637 } else if (val == 1) { 638 /* set SmartGuardian mode */ 639 data->fan_main_ctrl |= (1 << nr); 640 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 641 /* set saved pwm value, clear FAN_CTLX PWM mode bit */ 642 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); 643 } else { 644 mutex_unlock(&data->update_lock); 645 return -EINVAL; 646 } 647 648 mutex_unlock(&data->update_lock); 649 return count; 650 } 651 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 652 const char *buf, size_t count) 653 { 654 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 655 int nr = sensor_attr->index; 656 657 struct it87_data *data = dev_get_drvdata(dev); 658 int val = simple_strtol(buf, NULL, 10); 659 660 if (val < 0 || val > 255) 661 return -EINVAL; 662 663 mutex_lock(&data->update_lock); 664 data->manual_pwm_ctl[nr] = val; 665 if (data->fan_main_ctrl & (1 << nr)) 666 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); 667 mutex_unlock(&data->update_lock); 668 return count; 669 } 670 static ssize_t set_pwm_freq(struct device *dev, 671 struct device_attribute *attr, const char *buf, size_t count) 672 { 673 struct it87_data *data = dev_get_drvdata(dev); 674 unsigned long val = simple_strtoul(buf, NULL, 10); 675 int i; 676 677 /* Search for the nearest available frequency */ 678 for (i = 0; i < 7; i++) { 679 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2) 680 break; 681 } 682 683 mutex_lock(&data->update_lock); 684 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f; 685 data->fan_ctl |= i << 4; 686 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl); 687 mutex_unlock(&data->update_lock); 688 689 return count; 690 } 691 692 #define show_fan_offset(offset) \ 693 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 694 show_fan, NULL, offset - 1); \ 695 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 696 show_fan_min, set_fan_min, offset - 1); \ 697 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 698 show_fan_div, set_fan_div, offset - 1); 699 700 show_fan_offset(1); 701 show_fan_offset(2); 702 show_fan_offset(3); 703 704 #define show_pwm_offset(offset) \ 705 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 706 show_pwm_enable, set_pwm_enable, offset - 1); \ 707 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 708 show_pwm, set_pwm, offset - 1); \ 709 static DEVICE_ATTR(pwm##offset##_freq, \ 710 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \ 711 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); 712 713 show_pwm_offset(1); 714 show_pwm_offset(2); 715 show_pwm_offset(3); 716 717 /* A different set of callbacks for 16-bit fans */ 718 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr, 719 char *buf) 720 { 721 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 722 int nr = sensor_attr->index; 723 struct it87_data *data = it87_update_device(dev); 724 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr])); 725 } 726 727 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr, 728 char *buf) 729 { 730 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 731 int nr = sensor_attr->index; 732 struct it87_data *data = it87_update_device(dev); 733 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr])); 734 } 735 736 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr, 737 const char *buf, size_t count) 738 { 739 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 740 int nr = sensor_attr->index; 741 struct it87_data *data = dev_get_drvdata(dev); 742 int val = simple_strtol(buf, NULL, 10); 743 744 mutex_lock(&data->update_lock); 745 data->fan_min[nr] = FAN16_TO_REG(val); 746 it87_write_value(data, IT87_REG_FAN_MIN[nr], 747 data->fan_min[nr] & 0xff); 748 it87_write_value(data, IT87_REG_FANX_MIN[nr], 749 data->fan_min[nr] >> 8); 750 mutex_unlock(&data->update_lock); 751 return count; 752 } 753 754 /* We want to use the same sysfs file names as 8-bit fans, but we need 755 different variable names, so we have to use SENSOR_ATTR instead of 756 SENSOR_DEVICE_ATTR. */ 757 #define show_fan16_offset(offset) \ 758 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \ 759 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \ 760 show_fan16, NULL, offset - 1); \ 761 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \ 762 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 763 show_fan16_min, set_fan16_min, offset - 1) 764 765 show_fan16_offset(1); 766 show_fan16_offset(2); 767 show_fan16_offset(3); 768 show_fan16_offset(4); 769 show_fan16_offset(5); 770 771 /* Alarms */ 772 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 773 { 774 struct it87_data *data = it87_update_device(dev); 775 return sprintf(buf, "%u\n", data->alarms); 776 } 777 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 778 779 static ssize_t 780 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf) 781 { 782 struct it87_data *data = dev_get_drvdata(dev); 783 return sprintf(buf, "%u\n", data->vrm); 784 } 785 static ssize_t 786 store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 787 { 788 struct it87_data *data = dev_get_drvdata(dev); 789 u32 val; 790 791 val = simple_strtoul(buf, NULL, 10); 792 data->vrm = val; 793 794 return count; 795 } 796 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 797 798 static ssize_t 799 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf) 800 { 801 struct it87_data *data = it87_update_device(dev); 802 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 803 } 804 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 805 806 static ssize_t show_name(struct device *dev, struct device_attribute 807 *devattr, char *buf) 808 { 809 struct it87_data *data = dev_get_drvdata(dev); 810 return sprintf(buf, "%s\n", data->name); 811 } 812 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 813 814 static struct attribute *it87_attributes[] = { 815 &sensor_dev_attr_in0_input.dev_attr.attr, 816 &sensor_dev_attr_in1_input.dev_attr.attr, 817 &sensor_dev_attr_in2_input.dev_attr.attr, 818 &sensor_dev_attr_in3_input.dev_attr.attr, 819 &sensor_dev_attr_in4_input.dev_attr.attr, 820 &sensor_dev_attr_in5_input.dev_attr.attr, 821 &sensor_dev_attr_in6_input.dev_attr.attr, 822 &sensor_dev_attr_in7_input.dev_attr.attr, 823 &sensor_dev_attr_in8_input.dev_attr.attr, 824 &sensor_dev_attr_in0_min.dev_attr.attr, 825 &sensor_dev_attr_in1_min.dev_attr.attr, 826 &sensor_dev_attr_in2_min.dev_attr.attr, 827 &sensor_dev_attr_in3_min.dev_attr.attr, 828 &sensor_dev_attr_in4_min.dev_attr.attr, 829 &sensor_dev_attr_in5_min.dev_attr.attr, 830 &sensor_dev_attr_in6_min.dev_attr.attr, 831 &sensor_dev_attr_in7_min.dev_attr.attr, 832 &sensor_dev_attr_in0_max.dev_attr.attr, 833 &sensor_dev_attr_in1_max.dev_attr.attr, 834 &sensor_dev_attr_in2_max.dev_attr.attr, 835 &sensor_dev_attr_in3_max.dev_attr.attr, 836 &sensor_dev_attr_in4_max.dev_attr.attr, 837 &sensor_dev_attr_in5_max.dev_attr.attr, 838 &sensor_dev_attr_in6_max.dev_attr.attr, 839 &sensor_dev_attr_in7_max.dev_attr.attr, 840 841 &sensor_dev_attr_temp1_input.dev_attr.attr, 842 &sensor_dev_attr_temp2_input.dev_attr.attr, 843 &sensor_dev_attr_temp3_input.dev_attr.attr, 844 &sensor_dev_attr_temp1_max.dev_attr.attr, 845 &sensor_dev_attr_temp2_max.dev_attr.attr, 846 &sensor_dev_attr_temp3_max.dev_attr.attr, 847 &sensor_dev_attr_temp1_min.dev_attr.attr, 848 &sensor_dev_attr_temp2_min.dev_attr.attr, 849 &sensor_dev_attr_temp3_min.dev_attr.attr, 850 &sensor_dev_attr_temp1_type.dev_attr.attr, 851 &sensor_dev_attr_temp2_type.dev_attr.attr, 852 &sensor_dev_attr_temp3_type.dev_attr.attr, 853 854 &dev_attr_alarms.attr, 855 &dev_attr_name.attr, 856 NULL 857 }; 858 859 static const struct attribute_group it87_group = { 860 .attrs = it87_attributes, 861 }; 862 863 static struct attribute *it87_attributes_opt[] = { 864 &sensor_dev_attr_fan1_input16.dev_attr.attr, 865 &sensor_dev_attr_fan1_min16.dev_attr.attr, 866 &sensor_dev_attr_fan2_input16.dev_attr.attr, 867 &sensor_dev_attr_fan2_min16.dev_attr.attr, 868 &sensor_dev_attr_fan3_input16.dev_attr.attr, 869 &sensor_dev_attr_fan3_min16.dev_attr.attr, 870 &sensor_dev_attr_fan4_input16.dev_attr.attr, 871 &sensor_dev_attr_fan4_min16.dev_attr.attr, 872 &sensor_dev_attr_fan5_input16.dev_attr.attr, 873 &sensor_dev_attr_fan5_min16.dev_attr.attr, 874 875 &sensor_dev_attr_fan1_input.dev_attr.attr, 876 &sensor_dev_attr_fan1_min.dev_attr.attr, 877 &sensor_dev_attr_fan1_div.dev_attr.attr, 878 &sensor_dev_attr_fan2_input.dev_attr.attr, 879 &sensor_dev_attr_fan2_min.dev_attr.attr, 880 &sensor_dev_attr_fan2_div.dev_attr.attr, 881 &sensor_dev_attr_fan3_input.dev_attr.attr, 882 &sensor_dev_attr_fan3_min.dev_attr.attr, 883 &sensor_dev_attr_fan3_div.dev_attr.attr, 884 885 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 886 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 887 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 888 &sensor_dev_attr_pwm1.dev_attr.attr, 889 &sensor_dev_attr_pwm2.dev_attr.attr, 890 &sensor_dev_attr_pwm3.dev_attr.attr, 891 892 &dev_attr_vrm.attr, 893 &dev_attr_cpu0_vid.attr, 894 NULL 895 }; 896 897 static const struct attribute_group it87_group_opt = { 898 .attrs = it87_attributes_opt, 899 }; 900 901 /* SuperIO detection - will change isa_address if a chip is found */ 902 static int __init it87_find(unsigned short *address, 903 struct it87_sio_data *sio_data) 904 { 905 int err = -ENODEV; 906 u16 chip_type; 907 908 superio_enter(); 909 chip_type = superio_inw(DEVID); 910 911 switch (chip_type) { 912 case IT8705F_DEVID: 913 sio_data->type = it87; 914 break; 915 case IT8712F_DEVID: 916 sio_data->type = it8712; 917 break; 918 case IT8716F_DEVID: 919 case IT8726F_DEVID: 920 sio_data->type = it8716; 921 break; 922 case IT8718F_DEVID: 923 sio_data->type = it8718; 924 break; 925 case 0xffff: /* No device at all */ 926 goto exit; 927 default: 928 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n", 929 chip_type); 930 goto exit; 931 } 932 933 superio_select(PME); 934 if (!(superio_inb(IT87_ACT_REG) & 0x01)) { 935 pr_info("it87: Device not activated, skipping\n"); 936 goto exit; 937 } 938 939 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); 940 if (*address == 0) { 941 pr_info("it87: Base address not set, skipping\n"); 942 goto exit; 943 } 944 945 err = 0; 946 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n", 947 chip_type, *address, superio_inb(DEVREV) & 0x0f); 948 949 /* Read GPIO config and VID value from LDN 7 (GPIO) */ 950 if (chip_type != IT8705F_DEVID) { 951 int reg; 952 953 superio_select(GPIO); 954 if (chip_type == it8718) 955 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG); 956 957 reg = superio_inb(IT87_SIO_PINX2_REG); 958 if (reg & (1 << 0)) 959 pr_info("it87: in3 is VCC (+5V)\n"); 960 if (reg & (1 << 1)) 961 pr_info("it87: in7 is VCCH (+5V Stand-By)\n"); 962 } 963 964 exit: 965 superio_exit(); 966 return err; 967 } 968 969 static int __devinit it87_probe(struct platform_device *pdev) 970 { 971 struct it87_data *data; 972 struct resource *res; 973 struct device *dev = &pdev->dev; 974 struct it87_sio_data *sio_data = dev->platform_data; 975 int err = 0; 976 int enable_pwm_interface; 977 static const char *names[] = { 978 "it87", 979 "it8712", 980 "it8716", 981 "it8718", 982 }; 983 984 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 985 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) { 986 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", 987 (unsigned long)res->start, 988 (unsigned long)(res->start + IT87_EC_EXTENT - 1)); 989 err = -EBUSY; 990 goto ERROR0; 991 } 992 993 if (!(data = kzalloc(sizeof(struct it87_data), GFP_KERNEL))) { 994 err = -ENOMEM; 995 goto ERROR1; 996 } 997 998 data->addr = res->start; 999 data->type = sio_data->type; 1000 data->name = names[sio_data->type]; 1001 1002 /* Now, we do the remaining detection. */ 1003 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80) 1004 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) { 1005 err = -ENODEV; 1006 goto ERROR2; 1007 } 1008 1009 platform_set_drvdata(pdev, data); 1010 1011 mutex_init(&data->update_lock); 1012 1013 /* Check PWM configuration */ 1014 enable_pwm_interface = it87_check_pwm(dev); 1015 1016 /* Initialize the IT87 chip */ 1017 it87_init_device(pdev); 1018 1019 /* Register sysfs hooks */ 1020 if ((err = sysfs_create_group(&dev->kobj, &it87_group))) 1021 goto ERROR2; 1022 1023 /* Do not create fan files for disabled fans */ 1024 if (data->type == it8716 || data->type == it8718) { 1025 /* 16-bit tachometers */ 1026 if (data->has_fan & (1 << 0)) { 1027 if ((err = device_create_file(dev, 1028 &sensor_dev_attr_fan1_input16.dev_attr)) 1029 || (err = device_create_file(dev, 1030 &sensor_dev_attr_fan1_min16.dev_attr))) 1031 goto ERROR4; 1032 } 1033 if (data->has_fan & (1 << 1)) { 1034 if ((err = device_create_file(dev, 1035 &sensor_dev_attr_fan2_input16.dev_attr)) 1036 || (err = device_create_file(dev, 1037 &sensor_dev_attr_fan2_min16.dev_attr))) 1038 goto ERROR4; 1039 } 1040 if (data->has_fan & (1 << 2)) { 1041 if ((err = device_create_file(dev, 1042 &sensor_dev_attr_fan3_input16.dev_attr)) 1043 || (err = device_create_file(dev, 1044 &sensor_dev_attr_fan3_min16.dev_attr))) 1045 goto ERROR4; 1046 } 1047 if (data->has_fan & (1 << 3)) { 1048 if ((err = device_create_file(dev, 1049 &sensor_dev_attr_fan4_input16.dev_attr)) 1050 || (err = device_create_file(dev, 1051 &sensor_dev_attr_fan4_min16.dev_attr))) 1052 goto ERROR4; 1053 } 1054 if (data->has_fan & (1 << 4)) { 1055 if ((err = device_create_file(dev, 1056 &sensor_dev_attr_fan5_input16.dev_attr)) 1057 || (err = device_create_file(dev, 1058 &sensor_dev_attr_fan5_min16.dev_attr))) 1059 goto ERROR4; 1060 } 1061 } else { 1062 /* 8-bit tachometers with clock divider */ 1063 if (data->has_fan & (1 << 0)) { 1064 if ((err = device_create_file(dev, 1065 &sensor_dev_attr_fan1_input.dev_attr)) 1066 || (err = device_create_file(dev, 1067 &sensor_dev_attr_fan1_min.dev_attr)) 1068 || (err = device_create_file(dev, 1069 &sensor_dev_attr_fan1_div.dev_attr))) 1070 goto ERROR4; 1071 } 1072 if (data->has_fan & (1 << 1)) { 1073 if ((err = device_create_file(dev, 1074 &sensor_dev_attr_fan2_input.dev_attr)) 1075 || (err = device_create_file(dev, 1076 &sensor_dev_attr_fan2_min.dev_attr)) 1077 || (err = device_create_file(dev, 1078 &sensor_dev_attr_fan2_div.dev_attr))) 1079 goto ERROR4; 1080 } 1081 if (data->has_fan & (1 << 2)) { 1082 if ((err = device_create_file(dev, 1083 &sensor_dev_attr_fan3_input.dev_attr)) 1084 || (err = device_create_file(dev, 1085 &sensor_dev_attr_fan3_min.dev_attr)) 1086 || (err = device_create_file(dev, 1087 &sensor_dev_attr_fan3_div.dev_attr))) 1088 goto ERROR4; 1089 } 1090 } 1091 1092 if (enable_pwm_interface) { 1093 if ((err = device_create_file(dev, 1094 &sensor_dev_attr_pwm1_enable.dev_attr)) 1095 || (err = device_create_file(dev, 1096 &sensor_dev_attr_pwm2_enable.dev_attr)) 1097 || (err = device_create_file(dev, 1098 &sensor_dev_attr_pwm3_enable.dev_attr)) 1099 || (err = device_create_file(dev, 1100 &sensor_dev_attr_pwm1.dev_attr)) 1101 || (err = device_create_file(dev, 1102 &sensor_dev_attr_pwm2.dev_attr)) 1103 || (err = device_create_file(dev, 1104 &sensor_dev_attr_pwm3.dev_attr)) 1105 || (err = device_create_file(dev, 1106 &dev_attr_pwm1_freq)) 1107 || (err = device_create_file(dev, 1108 &dev_attr_pwm2_freq)) 1109 || (err = device_create_file(dev, 1110 &dev_attr_pwm3_freq))) 1111 goto ERROR4; 1112 } 1113 1114 if (data->type == it8712 || data->type == it8716 1115 || data->type == it8718) { 1116 data->vrm = vid_which_vrm(); 1117 /* VID reading from Super-I/O config space if available */ 1118 data->vid = sio_data->vid_value; 1119 if ((err = device_create_file(dev, 1120 &dev_attr_vrm)) 1121 || (err = device_create_file(dev, 1122 &dev_attr_cpu0_vid))) 1123 goto ERROR4; 1124 } 1125 1126 data->hwmon_dev = hwmon_device_register(dev); 1127 if (IS_ERR(data->hwmon_dev)) { 1128 err = PTR_ERR(data->hwmon_dev); 1129 goto ERROR4; 1130 } 1131 1132 return 0; 1133 1134 ERROR4: 1135 sysfs_remove_group(&dev->kobj, &it87_group); 1136 sysfs_remove_group(&dev->kobj, &it87_group_opt); 1137 ERROR2: 1138 platform_set_drvdata(pdev, NULL); 1139 kfree(data); 1140 ERROR1: 1141 release_region(res->start, IT87_EC_EXTENT); 1142 ERROR0: 1143 return err; 1144 } 1145 1146 static int __devexit it87_remove(struct platform_device *pdev) 1147 { 1148 struct it87_data *data = platform_get_drvdata(pdev); 1149 1150 hwmon_device_unregister(data->hwmon_dev); 1151 sysfs_remove_group(&pdev->dev.kobj, &it87_group); 1152 sysfs_remove_group(&pdev->dev.kobj, &it87_group_opt); 1153 1154 release_region(data->addr, IT87_EC_EXTENT); 1155 platform_set_drvdata(pdev, NULL); 1156 kfree(data); 1157 1158 return 0; 1159 } 1160 1161 /* Must be called with data->update_lock held, except during initialization. 1162 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1163 would slow down the IT87 access and should not be necessary. */ 1164 static int it87_read_value(struct it87_data *data, u8 reg) 1165 { 1166 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1167 return inb_p(data->addr + IT87_DATA_REG_OFFSET); 1168 } 1169 1170 /* Must be called with data->update_lock held, except during initialization. 1171 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1172 would slow down the IT87 access and should not be necessary. */ 1173 static void it87_write_value(struct it87_data *data, u8 reg, u8 value) 1174 { 1175 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1176 outb_p(value, data->addr + IT87_DATA_REG_OFFSET); 1177 } 1178 1179 /* Return 1 if and only if the PWM interface is safe to use */ 1180 static int __devinit it87_check_pwm(struct device *dev) 1181 { 1182 struct it87_data *data = dev_get_drvdata(dev); 1183 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off 1184 * and polarity set to active low is sign that this is the case so we 1185 * disable pwm control to protect the user. */ 1186 int tmp = it87_read_value(data, IT87_REG_FAN_CTL); 1187 if ((tmp & 0x87) == 0) { 1188 if (fix_pwm_polarity) { 1189 /* The user asks us to attempt a chip reconfiguration. 1190 * This means switching to active high polarity and 1191 * inverting all fan speed values. */ 1192 int i; 1193 u8 pwm[3]; 1194 1195 for (i = 0; i < 3; i++) 1196 pwm[i] = it87_read_value(data, 1197 IT87_REG_PWM(i)); 1198 1199 /* If any fan is in automatic pwm mode, the polarity 1200 * might be correct, as suspicious as it seems, so we 1201 * better don't change anything (but still disable the 1202 * PWM interface). */ 1203 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) { 1204 dev_info(dev, "Reconfiguring PWM to " 1205 "active high polarity\n"); 1206 it87_write_value(data, IT87_REG_FAN_CTL, 1207 tmp | 0x87); 1208 for (i = 0; i < 3; i++) 1209 it87_write_value(data, 1210 IT87_REG_PWM(i), 1211 0x7f & ~pwm[i]); 1212 return 1; 1213 } 1214 1215 dev_info(dev, "PWM configuration is " 1216 "too broken to be fixed\n"); 1217 } 1218 1219 dev_info(dev, "Detected broken BIOS " 1220 "defaults, disabling PWM interface\n"); 1221 return 0; 1222 } else if (fix_pwm_polarity) { 1223 dev_info(dev, "PWM configuration looks " 1224 "sane, won't touch\n"); 1225 } 1226 1227 return 1; 1228 } 1229 1230 /* Called when we have found a new IT87. */ 1231 static void __devinit it87_init_device(struct platform_device *pdev) 1232 { 1233 struct it87_data *data = platform_get_drvdata(pdev); 1234 int tmp, i; 1235 1236 /* initialize to sane defaults: 1237 * - if the chip is in manual pwm mode, this will be overwritten with 1238 * the actual settings on the chip (so in this case, initialization 1239 * is not needed) 1240 * - if in automatic or on/off mode, we could switch to manual mode, 1241 * read the registers and set manual_pwm_ctl accordingly, but currently 1242 * this is not implemented, so we initialize to something sane */ 1243 for (i = 0; i < 3; i++) { 1244 data->manual_pwm_ctl[i] = 0xff; 1245 } 1246 1247 /* Some chips seem to have default value 0xff for all limit 1248 * registers. For low voltage limits it makes no sense and triggers 1249 * alarms, so change to 0 instead. For high temperature limits, it 1250 * means -1 degree C, which surprisingly doesn't trigger an alarm, 1251 * but is still confusing, so change to 127 degrees C. */ 1252 for (i = 0; i < 8; i++) { 1253 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i)); 1254 if (tmp == 0xff) 1255 it87_write_value(data, IT87_REG_VIN_MIN(i), 0); 1256 } 1257 for (i = 0; i < 3; i++) { 1258 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1259 if (tmp == 0xff) 1260 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127); 1261 } 1262 1263 /* Check if temperature channnels are reset manually or by some reason */ 1264 tmp = it87_read_value(data, IT87_REG_TEMP_ENABLE); 1265 if ((tmp & 0x3f) == 0) { 1266 /* Temp1,Temp3=thermistor; Temp2=thermal diode */ 1267 tmp = (tmp & 0xc0) | 0x2a; 1268 it87_write_value(data, IT87_REG_TEMP_ENABLE, tmp); 1269 } 1270 data->sensor = tmp; 1271 1272 /* Check if voltage monitors are reset manually or by some reason */ 1273 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE); 1274 if ((tmp & 0xff) == 0) { 1275 /* Enable all voltage monitors */ 1276 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff); 1277 } 1278 1279 /* Check if tachometers are reset manually or by some reason */ 1280 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL); 1281 if ((data->fan_main_ctrl & 0x70) == 0) { 1282 /* Enable all fan tachometers */ 1283 data->fan_main_ctrl |= 0x70; 1284 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 1285 } 1286 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07; 1287 1288 /* Set tachometers to 16-bit mode if needed */ 1289 if (data->type == it8716 || data->type == it8718) { 1290 tmp = it87_read_value(data, IT87_REG_FAN_16BIT); 1291 if (~tmp & 0x07 & data->has_fan) { 1292 dev_dbg(&pdev->dev, 1293 "Setting fan1-3 to 16-bit mode\n"); 1294 it87_write_value(data, IT87_REG_FAN_16BIT, 1295 tmp | 0x07); 1296 } 1297 if (tmp & (1 << 4)) 1298 data->has_fan |= (1 << 3); /* fan4 enabled */ 1299 if (tmp & (1 << 5)) 1300 data->has_fan |= (1 << 4); /* fan5 enabled */ 1301 } 1302 1303 /* Set current fan mode registers and the default settings for the 1304 * other mode registers */ 1305 for (i = 0; i < 3; i++) { 1306 if (data->fan_main_ctrl & (1 << i)) { 1307 /* pwm mode */ 1308 tmp = it87_read_value(data, IT87_REG_PWM(i)); 1309 if (tmp & 0x80) { 1310 /* automatic pwm - not yet implemented, but 1311 * leave the settings made by the BIOS alone 1312 * until a change is requested via the sysfs 1313 * interface */ 1314 } else { 1315 /* manual pwm */ 1316 data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp); 1317 } 1318 } 1319 } 1320 1321 /* Start monitoring */ 1322 it87_write_value(data, IT87_REG_CONFIG, 1323 (it87_read_value(data, IT87_REG_CONFIG) & 0x36) 1324 | (update_vbat ? 0x41 : 0x01)); 1325 } 1326 1327 static struct it87_data *it87_update_device(struct device *dev) 1328 { 1329 struct it87_data *data = dev_get_drvdata(dev); 1330 int i; 1331 1332 mutex_lock(&data->update_lock); 1333 1334 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 1335 || !data->valid) { 1336 1337 if (update_vbat) { 1338 /* Cleared after each update, so reenable. Value 1339 returned by this read will be previous value */ 1340 it87_write_value(data, IT87_REG_CONFIG, 1341 it87_read_value(data, IT87_REG_CONFIG) | 0x40); 1342 } 1343 for (i = 0; i <= 7; i++) { 1344 data->in[i] = 1345 it87_read_value(data, IT87_REG_VIN(i)); 1346 data->in_min[i] = 1347 it87_read_value(data, IT87_REG_VIN_MIN(i)); 1348 data->in_max[i] = 1349 it87_read_value(data, IT87_REG_VIN_MAX(i)); 1350 } 1351 /* in8 (battery) has no limit registers */ 1352 data->in[8] = 1353 it87_read_value(data, IT87_REG_VIN(8)); 1354 1355 for (i = 0; i < 5; i++) { 1356 /* Skip disabled fans */ 1357 if (!(data->has_fan & (1 << i))) 1358 continue; 1359 1360 data->fan_min[i] = 1361 it87_read_value(data, IT87_REG_FAN_MIN[i]); 1362 data->fan[i] = it87_read_value(data, 1363 IT87_REG_FAN[i]); 1364 /* Add high byte if in 16-bit mode */ 1365 if (data->type == it8716 || data->type == it8718) { 1366 data->fan[i] |= it87_read_value(data, 1367 IT87_REG_FANX[i]) << 8; 1368 data->fan_min[i] |= it87_read_value(data, 1369 IT87_REG_FANX_MIN[i]) << 8; 1370 } 1371 } 1372 for (i = 0; i < 3; i++) { 1373 data->temp[i] = 1374 it87_read_value(data, IT87_REG_TEMP(i)); 1375 data->temp_high[i] = 1376 it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1377 data->temp_low[i] = 1378 it87_read_value(data, IT87_REG_TEMP_LOW(i)); 1379 } 1380 1381 /* Newer chips don't have clock dividers */ 1382 if ((data->has_fan & 0x07) && data->type != it8716 1383 && data->type != it8718) { 1384 i = it87_read_value(data, IT87_REG_FAN_DIV); 1385 data->fan_div[0] = i & 0x07; 1386 data->fan_div[1] = (i >> 3) & 0x07; 1387 data->fan_div[2] = (i & 0x40) ? 3 : 1; 1388 } 1389 1390 data->alarms = 1391 it87_read_value(data, IT87_REG_ALARM1) | 1392 (it87_read_value(data, IT87_REG_ALARM2) << 8) | 1393 (it87_read_value(data, IT87_REG_ALARM3) << 16); 1394 data->fan_main_ctrl = it87_read_value(data, 1395 IT87_REG_FAN_MAIN_CTRL); 1396 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL); 1397 1398 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE); 1399 /* The 8705 does not have VID capability */ 1400 if (data->type == it8712 || data->type == it8716) { 1401 data->vid = it87_read_value(data, IT87_REG_VID); 1402 /* The older IT8712F revisions had only 5 VID pins, 1403 but we assume it is always safe to read 6 bits. */ 1404 data->vid &= 0x3f; 1405 } 1406 data->last_updated = jiffies; 1407 data->valid = 1; 1408 } 1409 1410 mutex_unlock(&data->update_lock); 1411 1412 return data; 1413 } 1414 1415 static int __init it87_device_add(unsigned short address, 1416 const struct it87_sio_data *sio_data) 1417 { 1418 struct resource res = { 1419 .start = address + IT87_EC_OFFSET, 1420 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1, 1421 .name = DRVNAME, 1422 .flags = IORESOURCE_IO, 1423 }; 1424 int err; 1425 1426 pdev = platform_device_alloc(DRVNAME, address); 1427 if (!pdev) { 1428 err = -ENOMEM; 1429 printk(KERN_ERR DRVNAME ": Device allocation failed\n"); 1430 goto exit; 1431 } 1432 1433 err = platform_device_add_resources(pdev, &res, 1); 1434 if (err) { 1435 printk(KERN_ERR DRVNAME ": Device resource addition failed " 1436 "(%d)\n", err); 1437 goto exit_device_put; 1438 } 1439 1440 err = platform_device_add_data(pdev, sio_data, 1441 sizeof(struct it87_sio_data)); 1442 if (err) { 1443 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n"); 1444 goto exit_device_put; 1445 } 1446 1447 err = platform_device_add(pdev); 1448 if (err) { 1449 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", 1450 err); 1451 goto exit_device_put; 1452 } 1453 1454 return 0; 1455 1456 exit_device_put: 1457 platform_device_put(pdev); 1458 exit: 1459 return err; 1460 } 1461 1462 static int __init sm_it87_init(void) 1463 { 1464 int err; 1465 unsigned short isa_address=0; 1466 struct it87_sio_data sio_data; 1467 1468 err = it87_find(&isa_address, &sio_data); 1469 if (err) 1470 return err; 1471 err = platform_driver_register(&it87_driver); 1472 if (err) 1473 return err; 1474 1475 err = it87_device_add(isa_address, &sio_data); 1476 if (err){ 1477 platform_driver_unregister(&it87_driver); 1478 return err; 1479 } 1480 1481 return 0; 1482 } 1483 1484 static void __exit sm_it87_exit(void) 1485 { 1486 platform_device_unregister(pdev); 1487 platform_driver_unregister(&it87_driver); 1488 } 1489 1490 1491 MODULE_AUTHOR("Chris Gauthron <chrisg@0-in.com>, " 1492 "Jean Delvare <khali@linux-fr.org>"); 1493 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8726F, SiS950 driver"); 1494 module_param(update_vbat, bool, 0); 1495 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); 1496 module_param(fix_pwm_polarity, bool, 0); 1497 MODULE_PARM_DESC(fix_pwm_polarity, "Force PWM polarity to active high (DANGEROUS)"); 1498 MODULE_LICENSE("GPL"); 1499 1500 module_init(sm_it87_init); 1501 module_exit(sm_it87_exit); 1502