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