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