1 /* 2 it87.c - Part of lm_sensors, Linux kernel modules for hardware 3 monitoring. 4 5 The IT8705F is an LPC-based Super I/O part that contains UARTs, a 6 parallel port, an IR port, a MIDI port, a floppy controller, etc., in 7 addition to an Environment Controller (Enhanced Hardware Monitor and 8 Fan Controller) 9 10 This driver supports only the Environment Controller in the IT8705F and 11 similar parts. The other devices are supported by different drivers. 12 13 Supports: IT8705F Super I/O chip w/LPC interface 14 IT8712F Super I/O chip w/LPC interface 15 IT8716F Super I/O chip w/LPC interface 16 IT8718F Super I/O chip w/LPC interface 17 IT8726F Super I/O chip w/LPC interface 18 Sis950 A clone of the IT8705F 19 20 Copyright (C) 2001 Chris Gauthron 21 Copyright (C) 2005-2007 Jean Delvare <khali@linux-fr.org> 22 23 This program is free software; you can redistribute it and/or modify 24 it under the terms of the GNU General Public License as published by 25 the Free Software Foundation; either version 2 of the License, or 26 (at your option) any later version. 27 28 This program is distributed in the hope that it will be useful, 29 but WITHOUT ANY WARRANTY; without even the implied warranty of 30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 31 GNU General Public License for more details. 32 33 You should have received a copy of the GNU General Public License 34 along with this program; if not, write to the Free Software 35 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 36 */ 37 38 #include <linux/module.h> 39 #include <linux/init.h> 40 #include <linux/slab.h> 41 #include <linux/jiffies.h> 42 #include <linux/platform_device.h> 43 #include <linux/hwmon.h> 44 #include <linux/hwmon-sysfs.h> 45 #include <linux/hwmon-vid.h> 46 #include <linux/err.h> 47 #include <linux/mutex.h> 48 #include <linux/sysfs.h> 49 #include <linux/string.h> 50 #include <linux/dmi.h> 51 #include <asm/io.h> 52 53 #define DRVNAME "it87" 54 55 enum chips { it87, it8712, it8716, it8718 }; 56 57 static unsigned short force_id; 58 module_param(force_id, ushort, 0); 59 MODULE_PARM_DESC(force_id, "Override the detected device ID"); 60 61 static struct platform_device *pdev; 62 63 #define REG 0x2e /* The register to read/write */ 64 #define DEV 0x07 /* Register: Logical device select */ 65 #define VAL 0x2f /* The value to read/write */ 66 #define PME 0x04 /* The device with the fan registers in it */ 67 #define GPIO 0x07 /* The device with the IT8718F VID value in it */ 68 #define DEVID 0x20 /* Register: Device ID */ 69 #define DEVREV 0x22 /* Register: Device Revision */ 70 71 static inline int 72 superio_inb(int reg) 73 { 74 outb(reg, REG); 75 return inb(VAL); 76 } 77 78 static int superio_inw(int reg) 79 { 80 int val; 81 outb(reg++, REG); 82 val = inb(VAL) << 8; 83 outb(reg, REG); 84 val |= inb(VAL); 85 return val; 86 } 87 88 static inline void 89 superio_select(int ldn) 90 { 91 outb(DEV, REG); 92 outb(ldn, VAL); 93 } 94 95 static inline void 96 superio_enter(void) 97 { 98 outb(0x87, REG); 99 outb(0x01, REG); 100 outb(0x55, REG); 101 outb(0x55, REG); 102 } 103 104 static inline void 105 superio_exit(void) 106 { 107 outb(0x02, REG); 108 outb(0x02, VAL); 109 } 110 111 /* Logical device 4 registers */ 112 #define IT8712F_DEVID 0x8712 113 #define IT8705F_DEVID 0x8705 114 #define IT8716F_DEVID 0x8716 115 #define IT8718F_DEVID 0x8718 116 #define IT8726F_DEVID 0x8726 117 #define IT87_ACT_REG 0x30 118 #define IT87_BASE_REG 0x60 119 120 /* Logical device 7 registers (IT8712F and later) */ 121 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */ 122 #define IT87_SIO_VID_REG 0xfc /* VID value */ 123 124 /* Update battery voltage after every reading if true */ 125 static int update_vbat; 126 127 /* Not all BIOSes properly configure the PWM registers */ 128 static int fix_pwm_polarity; 129 130 /* Many IT87 constants specified below */ 131 132 /* Length of ISA address segment */ 133 #define IT87_EXTENT 8 134 135 /* Length of ISA address segment for Environmental Controller */ 136 #define IT87_EC_EXTENT 2 137 138 /* Offset of EC registers from ISA base address */ 139 #define IT87_EC_OFFSET 5 140 141 /* Where are the ISA address/data registers relative to the EC base address */ 142 #define IT87_ADDR_REG_OFFSET 0 143 #define IT87_DATA_REG_OFFSET 1 144 145 /*----- The IT87 registers -----*/ 146 147 #define IT87_REG_CONFIG 0x00 148 149 #define IT87_REG_ALARM1 0x01 150 #define IT87_REG_ALARM2 0x02 151 #define IT87_REG_ALARM3 0x03 152 153 /* The IT8718F has the VID value in a different register, in Super-I/O 154 configuration space. */ 155 #define IT87_REG_VID 0x0a 156 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b 157 for fan divisors. Later IT8712F revisions must use 16-bit tachometer 158 mode. */ 159 #define IT87_REG_FAN_DIV 0x0b 160 #define IT87_REG_FAN_16BIT 0x0c 161 162 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */ 163 164 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 }; 165 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 }; 166 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 }; 167 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 }; 168 #define IT87_REG_FAN_MAIN_CTRL 0x13 169 #define IT87_REG_FAN_CTL 0x14 170 #define IT87_REG_PWM(nr) (0x15 + (nr)) 171 172 #define IT87_REG_VIN(nr) (0x20 + (nr)) 173 #define IT87_REG_TEMP(nr) (0x29 + (nr)) 174 175 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2) 176 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2) 177 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2) 178 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2) 179 180 #define IT87_REG_VIN_ENABLE 0x50 181 #define IT87_REG_TEMP_ENABLE 0x51 182 183 #define IT87_REG_CHIPID 0x58 184 185 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255)) 186 #define IN_FROM_REG(val) ((val) * 16) 187 188 static inline u8 FAN_TO_REG(long rpm, int div) 189 { 190 if (rpm == 0) 191 return 255; 192 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 193 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 194 254); 195 } 196 197 static inline u16 FAN16_TO_REG(long rpm) 198 { 199 if (rpm == 0) 200 return 0xffff; 201 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe); 202 } 203 204 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div))) 205 /* The divider is fixed to 2 in 16-bit mode */ 206 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2)) 207 208 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\ 209 ((val)+500)/1000),-128,127)) 210 #define TEMP_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000) 211 212 #define PWM_TO_REG(val) ((val) >> 1) 213 #define PWM_FROM_REG(val) (((val)&0x7f) << 1) 214 215 static int DIV_TO_REG(int val) 216 { 217 int answer = 0; 218 while (answer < 7 && (val >>= 1)) 219 answer++; 220 return answer; 221 } 222 #define DIV_FROM_REG(val) (1 << (val)) 223 224 static const unsigned int pwm_freq[8] = { 225 48000000 / 128, 226 24000000 / 128, 227 12000000 / 128, 228 8000000 / 128, 229 6000000 / 128, 230 3000000 / 128, 231 1500000 / 128, 232 750000 / 128, 233 }; 234 235 236 struct it87_sio_data { 237 enum chips type; 238 /* Values read from Super-I/O config space */ 239 u8 revision; 240 u8 vid_value; 241 /* Values set based on DMI strings */ 242 u8 skip_pwm; 243 }; 244 245 /* For each registered chip, we need to keep some data in memory. 246 The structure is dynamically allocated. */ 247 struct it87_data { 248 struct device *hwmon_dev; 249 enum chips type; 250 u8 revision; 251 252 unsigned short addr; 253 const char *name; 254 struct mutex update_lock; 255 char valid; /* !=0 if following fields are valid */ 256 unsigned long last_updated; /* In jiffies */ 257 258 u8 in[9]; /* Register value */ 259 u8 in_max[8]; /* Register value */ 260 u8 in_min[8]; /* Register value */ 261 u8 has_fan; /* Bitfield, fans enabled */ 262 u16 fan[5]; /* Register values, possibly combined */ 263 u16 fan_min[5]; /* Register values, possibly combined */ 264 u8 temp[3]; /* Register value */ 265 u8 temp_high[3]; /* Register value */ 266 u8 temp_low[3]; /* Register value */ 267 u8 sensor; /* Register value */ 268 u8 fan_div[3]; /* Register encoding, shifted right */ 269 u8 vid; /* Register encoding, combined */ 270 u8 vrm; 271 u32 alarms; /* Register encoding, combined */ 272 u8 fan_main_ctrl; /* Register value */ 273 u8 fan_ctl; /* Register value */ 274 u8 manual_pwm_ctl[3]; /* manual PWM value set by user */ 275 }; 276 277 static inline int has_16bit_fans(const struct it87_data *data) 278 { 279 /* IT8705F Datasheet 0.4.1, 3h == Version G. 280 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J. 281 These are the first revisions with 16bit tachometer support. */ 282 return (data->type == it87 && data->revision >= 0x03) 283 || (data->type == it8712 && data->revision >= 0x08) 284 || data->type == it8716 285 || data->type == it8718; 286 } 287 288 static int it87_probe(struct platform_device *pdev); 289 static int __devexit it87_remove(struct platform_device *pdev); 290 291 static int it87_read_value(struct it87_data *data, u8 reg); 292 static void it87_write_value(struct it87_data *data, u8 reg, u8 value); 293 static struct it87_data *it87_update_device(struct device *dev); 294 static int it87_check_pwm(struct device *dev); 295 static void it87_init_device(struct platform_device *pdev); 296 297 298 static struct platform_driver it87_driver = { 299 .driver = { 300 .owner = THIS_MODULE, 301 .name = DRVNAME, 302 }, 303 .probe = it87_probe, 304 .remove = __devexit_p(it87_remove), 305 }; 306 307 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 308 char *buf) 309 { 310 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 311 int nr = sensor_attr->index; 312 313 struct it87_data *data = it87_update_device(dev); 314 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); 315 } 316 317 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 318 char *buf) 319 { 320 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 321 int nr = sensor_attr->index; 322 323 struct it87_data *data = it87_update_device(dev); 324 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); 325 } 326 327 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 328 char *buf) 329 { 330 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 331 int nr = sensor_attr->index; 332 333 struct it87_data *data = it87_update_device(dev); 334 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); 335 } 336 337 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 338 const char *buf, size_t count) 339 { 340 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 341 int nr = sensor_attr->index; 342 343 struct it87_data *data = dev_get_drvdata(dev); 344 unsigned long val = simple_strtoul(buf, NULL, 10); 345 346 mutex_lock(&data->update_lock); 347 data->in_min[nr] = IN_TO_REG(val); 348 it87_write_value(data, IT87_REG_VIN_MIN(nr), 349 data->in_min[nr]); 350 mutex_unlock(&data->update_lock); 351 return count; 352 } 353 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 354 const char *buf, size_t count) 355 { 356 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 357 int nr = sensor_attr->index; 358 359 struct it87_data *data = dev_get_drvdata(dev); 360 unsigned long val = simple_strtoul(buf, NULL, 10); 361 362 mutex_lock(&data->update_lock); 363 data->in_max[nr] = IN_TO_REG(val); 364 it87_write_value(data, IT87_REG_VIN_MAX(nr), 365 data->in_max[nr]); 366 mutex_unlock(&data->update_lock); 367 return count; 368 } 369 370 #define show_in_offset(offset) \ 371 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 372 show_in, NULL, offset); 373 374 #define limit_in_offset(offset) \ 375 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 376 show_in_min, set_in_min, offset); \ 377 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 378 show_in_max, set_in_max, offset); 379 380 show_in_offset(0); 381 limit_in_offset(0); 382 show_in_offset(1); 383 limit_in_offset(1); 384 show_in_offset(2); 385 limit_in_offset(2); 386 show_in_offset(3); 387 limit_in_offset(3); 388 show_in_offset(4); 389 limit_in_offset(4); 390 show_in_offset(5); 391 limit_in_offset(5); 392 show_in_offset(6); 393 limit_in_offset(6); 394 show_in_offset(7); 395 limit_in_offset(7); 396 show_in_offset(8); 397 398 /* 3 temperatures */ 399 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 400 char *buf) 401 { 402 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 403 int nr = sensor_attr->index; 404 405 struct it87_data *data = it87_update_device(dev); 406 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 407 } 408 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 409 char *buf) 410 { 411 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 412 int nr = sensor_attr->index; 413 414 struct it87_data *data = it87_update_device(dev); 415 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr])); 416 } 417 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 418 char *buf) 419 { 420 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 421 int nr = sensor_attr->index; 422 423 struct it87_data *data = it87_update_device(dev); 424 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr])); 425 } 426 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 427 const char *buf, size_t count) 428 { 429 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 430 int nr = sensor_attr->index; 431 432 struct it87_data *data = dev_get_drvdata(dev); 433 int val = simple_strtol(buf, NULL, 10); 434 435 mutex_lock(&data->update_lock); 436 data->temp_high[nr] = TEMP_TO_REG(val); 437 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]); 438 mutex_unlock(&data->update_lock); 439 return count; 440 } 441 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 442 const char *buf, size_t count) 443 { 444 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 445 int nr = sensor_attr->index; 446 447 struct it87_data *data = dev_get_drvdata(dev); 448 int val = simple_strtol(buf, NULL, 10); 449 450 mutex_lock(&data->update_lock); 451 data->temp_low[nr] = TEMP_TO_REG(val); 452 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]); 453 mutex_unlock(&data->update_lock); 454 return count; 455 } 456 #define show_temp_offset(offset) \ 457 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 458 show_temp, NULL, offset - 1); \ 459 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 460 show_temp_max, set_temp_max, offset - 1); \ 461 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 462 show_temp_min, set_temp_min, offset - 1); 463 464 show_temp_offset(1); 465 show_temp_offset(2); 466 show_temp_offset(3); 467 468 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, 469 char *buf) 470 { 471 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 472 int nr = sensor_attr->index; 473 474 struct it87_data *data = it87_update_device(dev); 475 u8 reg = data->sensor; /* In case the value is updated while we use it */ 476 477 if (reg & (1 << nr)) 478 return sprintf(buf, "3\n"); /* thermal diode */ 479 if (reg & (8 << nr)) 480 return sprintf(buf, "4\n"); /* thermistor */ 481 return sprintf(buf, "0\n"); /* disabled */ 482 } 483 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr, 484 const char *buf, size_t count) 485 { 486 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 487 int nr = sensor_attr->index; 488 489 struct it87_data *data = dev_get_drvdata(dev); 490 int val = simple_strtol(buf, NULL, 10); 491 492 mutex_lock(&data->update_lock); 493 494 data->sensor &= ~(1 << nr); 495 data->sensor &= ~(8 << nr); 496 if (val == 2) { /* backwards compatibility */ 497 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 " 498 "instead\n"); 499 val = 4; 500 } 501 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */ 502 if (val == 3) 503 data->sensor |= 1 << nr; 504 else if (val == 4) 505 data->sensor |= 8 << nr; 506 else if (val != 0) { 507 mutex_unlock(&data->update_lock); 508 return -EINVAL; 509 } 510 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor); 511 mutex_unlock(&data->update_lock); 512 return count; 513 } 514 #define show_sensor_offset(offset) \ 515 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \ 516 show_sensor, set_sensor, offset - 1); 517 518 show_sensor_offset(1); 519 show_sensor_offset(2); 520 show_sensor_offset(3); 521 522 /* 3 Fans */ 523 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 524 char *buf) 525 { 526 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 527 int nr = sensor_attr->index; 528 529 struct it87_data *data = it87_update_device(dev); 530 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr], 531 DIV_FROM_REG(data->fan_div[nr]))); 532 } 533 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 534 char *buf) 535 { 536 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 537 int nr = sensor_attr->index; 538 539 struct it87_data *data = it87_update_device(dev); 540 return sprintf(buf,"%d\n", 541 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]))); 542 } 543 static ssize_t show_fan_div(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", DIV_FROM_REG(data->fan_div[nr])); 551 } 552 static ssize_t show_pwm_enable(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->fan_main_ctrl & (1 << nr)) ? 1 : 0); 560 } 561 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 562 char *buf) 563 { 564 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 565 int nr = sensor_attr->index; 566 567 struct it87_data *data = it87_update_device(dev); 568 return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]); 569 } 570 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr, 571 char *buf) 572 { 573 struct it87_data *data = it87_update_device(dev); 574 int index = (data->fan_ctl >> 4) & 0x07; 575 576 return sprintf(buf, "%u\n", pwm_freq[index]); 577 } 578 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 579 const char *buf, size_t count) 580 { 581 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 582 int nr = sensor_attr->index; 583 584 struct it87_data *data = dev_get_drvdata(dev); 585 int val = simple_strtol(buf, NULL, 10); 586 u8 reg; 587 588 mutex_lock(&data->update_lock); 589 reg = it87_read_value(data, IT87_REG_FAN_DIV); 590 switch (nr) { 591 case 0: data->fan_div[nr] = reg & 0x07; break; 592 case 1: data->fan_div[nr] = (reg >> 3) & 0x07; break; 593 case 2: data->fan_div[nr] = (reg & 0x40) ? 3 : 1; break; 594 } 595 596 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 597 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 598 mutex_unlock(&data->update_lock); 599 return count; 600 } 601 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 602 const char *buf, size_t count) 603 { 604 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 605 int nr = sensor_attr->index; 606 607 struct it87_data *data = dev_get_drvdata(dev); 608 unsigned long val = simple_strtoul(buf, NULL, 10); 609 int min; 610 u8 old; 611 612 mutex_lock(&data->update_lock); 613 old = it87_read_value(data, IT87_REG_FAN_DIV); 614 615 /* Save fan min limit */ 616 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 617 618 switch (nr) { 619 case 0: 620 case 1: 621 data->fan_div[nr] = DIV_TO_REG(val); 622 break; 623 case 2: 624 if (val < 8) 625 data->fan_div[nr] = 1; 626 else 627 data->fan_div[nr] = 3; 628 } 629 val = old & 0x80; 630 val |= (data->fan_div[0] & 0x07); 631 val |= (data->fan_div[1] & 0x07) << 3; 632 if (data->fan_div[2] == 3) 633 val |= 0x1 << 6; 634 it87_write_value(data, IT87_REG_FAN_DIV, val); 635 636 /* Restore fan min limit */ 637 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 638 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]); 639 640 mutex_unlock(&data->update_lock); 641 return count; 642 } 643 static ssize_t set_pwm_enable(struct device *dev, 644 struct device_attribute *attr, const char *buf, size_t count) 645 { 646 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 647 int nr = sensor_attr->index; 648 649 struct it87_data *data = dev_get_drvdata(dev); 650 int val = simple_strtol(buf, NULL, 10); 651 652 mutex_lock(&data->update_lock); 653 654 if (val == 0) { 655 int tmp; 656 /* make sure the fan is on when in on/off mode */ 657 tmp = it87_read_value(data, IT87_REG_FAN_CTL); 658 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr)); 659 /* set on/off mode */ 660 data->fan_main_ctrl &= ~(1 << nr); 661 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 662 } else if (val == 1) { 663 /* set SmartGuardian mode */ 664 data->fan_main_ctrl |= (1 << nr); 665 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 666 /* set saved pwm value, clear FAN_CTLX PWM mode bit */ 667 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); 668 } else { 669 mutex_unlock(&data->update_lock); 670 return -EINVAL; 671 } 672 673 mutex_unlock(&data->update_lock); 674 return count; 675 } 676 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 677 const char *buf, size_t count) 678 { 679 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 680 int nr = sensor_attr->index; 681 682 struct it87_data *data = dev_get_drvdata(dev); 683 int val = simple_strtol(buf, NULL, 10); 684 685 if (val < 0 || val > 255) 686 return -EINVAL; 687 688 mutex_lock(&data->update_lock); 689 data->manual_pwm_ctl[nr] = val; 690 if (data->fan_main_ctrl & (1 << nr)) 691 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr])); 692 mutex_unlock(&data->update_lock); 693 return count; 694 } 695 static ssize_t set_pwm_freq(struct device *dev, 696 struct device_attribute *attr, const char *buf, size_t count) 697 { 698 struct it87_data *data = dev_get_drvdata(dev); 699 unsigned long val = simple_strtoul(buf, NULL, 10); 700 int i; 701 702 /* Search for the nearest available frequency */ 703 for (i = 0; i < 7; i++) { 704 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2) 705 break; 706 } 707 708 mutex_lock(&data->update_lock); 709 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f; 710 data->fan_ctl |= i << 4; 711 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl); 712 mutex_unlock(&data->update_lock); 713 714 return count; 715 } 716 717 #define show_fan_offset(offset) \ 718 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 719 show_fan, NULL, offset - 1); \ 720 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 721 show_fan_min, set_fan_min, offset - 1); \ 722 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 723 show_fan_div, set_fan_div, offset - 1); 724 725 show_fan_offset(1); 726 show_fan_offset(2); 727 show_fan_offset(3); 728 729 #define show_pwm_offset(offset) \ 730 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 731 show_pwm_enable, set_pwm_enable, offset - 1); \ 732 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 733 show_pwm, set_pwm, offset - 1); \ 734 static DEVICE_ATTR(pwm##offset##_freq, \ 735 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \ 736 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); 737 738 show_pwm_offset(1); 739 show_pwm_offset(2); 740 show_pwm_offset(3); 741 742 /* A different set of callbacks for 16-bit fans */ 743 static ssize_t show_fan16(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[nr])); 750 } 751 752 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr, 753 char *buf) 754 { 755 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 756 int nr = sensor_attr->index; 757 struct it87_data *data = it87_update_device(dev); 758 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr])); 759 } 760 761 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr, 762 const char *buf, size_t count) 763 { 764 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 765 int nr = sensor_attr->index; 766 struct it87_data *data = dev_get_drvdata(dev); 767 int val = simple_strtol(buf, NULL, 10); 768 769 mutex_lock(&data->update_lock); 770 data->fan_min[nr] = FAN16_TO_REG(val); 771 it87_write_value(data, IT87_REG_FAN_MIN[nr], 772 data->fan_min[nr] & 0xff); 773 it87_write_value(data, IT87_REG_FANX_MIN[nr], 774 data->fan_min[nr] >> 8); 775 mutex_unlock(&data->update_lock); 776 return count; 777 } 778 779 /* We want to use the same sysfs file names as 8-bit fans, but we need 780 different variable names, so we have to use SENSOR_ATTR instead of 781 SENSOR_DEVICE_ATTR. */ 782 #define show_fan16_offset(offset) \ 783 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \ 784 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \ 785 show_fan16, NULL, offset - 1); \ 786 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \ 787 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 788 show_fan16_min, set_fan16_min, offset - 1) 789 790 show_fan16_offset(1); 791 show_fan16_offset(2); 792 show_fan16_offset(3); 793 show_fan16_offset(4); 794 show_fan16_offset(5); 795 796 /* Alarms */ 797 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 798 { 799 struct it87_data *data = it87_update_device(dev); 800 return sprintf(buf, "%u\n", data->alarms); 801 } 802 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 803 804 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 805 char *buf) 806 { 807 int bitnr = to_sensor_dev_attr(attr)->index; 808 struct it87_data *data = it87_update_device(dev); 809 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 810 } 811 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8); 812 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9); 813 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10); 814 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11); 815 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12); 816 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13); 817 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14); 818 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15); 819 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0); 820 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1); 821 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2); 822 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3); 823 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6); 824 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16); 825 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17); 826 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18); 827 828 static ssize_t 829 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf) 830 { 831 struct it87_data *data = dev_get_drvdata(dev); 832 return sprintf(buf, "%u\n", data->vrm); 833 } 834 static ssize_t 835 store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 836 { 837 struct it87_data *data = dev_get_drvdata(dev); 838 u32 val; 839 840 val = simple_strtoul(buf, NULL, 10); 841 data->vrm = val; 842 843 return count; 844 } 845 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 846 847 static ssize_t 848 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf) 849 { 850 struct it87_data *data = it87_update_device(dev); 851 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 852 } 853 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 854 855 static ssize_t show_name(struct device *dev, struct device_attribute 856 *devattr, char *buf) 857 { 858 struct it87_data *data = dev_get_drvdata(dev); 859 return sprintf(buf, "%s\n", data->name); 860 } 861 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 862 863 static struct attribute *it87_attributes[] = { 864 &sensor_dev_attr_in0_input.dev_attr.attr, 865 &sensor_dev_attr_in1_input.dev_attr.attr, 866 &sensor_dev_attr_in2_input.dev_attr.attr, 867 &sensor_dev_attr_in3_input.dev_attr.attr, 868 &sensor_dev_attr_in4_input.dev_attr.attr, 869 &sensor_dev_attr_in5_input.dev_attr.attr, 870 &sensor_dev_attr_in6_input.dev_attr.attr, 871 &sensor_dev_attr_in7_input.dev_attr.attr, 872 &sensor_dev_attr_in8_input.dev_attr.attr, 873 &sensor_dev_attr_in0_min.dev_attr.attr, 874 &sensor_dev_attr_in1_min.dev_attr.attr, 875 &sensor_dev_attr_in2_min.dev_attr.attr, 876 &sensor_dev_attr_in3_min.dev_attr.attr, 877 &sensor_dev_attr_in4_min.dev_attr.attr, 878 &sensor_dev_attr_in5_min.dev_attr.attr, 879 &sensor_dev_attr_in6_min.dev_attr.attr, 880 &sensor_dev_attr_in7_min.dev_attr.attr, 881 &sensor_dev_attr_in0_max.dev_attr.attr, 882 &sensor_dev_attr_in1_max.dev_attr.attr, 883 &sensor_dev_attr_in2_max.dev_attr.attr, 884 &sensor_dev_attr_in3_max.dev_attr.attr, 885 &sensor_dev_attr_in4_max.dev_attr.attr, 886 &sensor_dev_attr_in5_max.dev_attr.attr, 887 &sensor_dev_attr_in6_max.dev_attr.attr, 888 &sensor_dev_attr_in7_max.dev_attr.attr, 889 &sensor_dev_attr_in0_alarm.dev_attr.attr, 890 &sensor_dev_attr_in1_alarm.dev_attr.attr, 891 &sensor_dev_attr_in2_alarm.dev_attr.attr, 892 &sensor_dev_attr_in3_alarm.dev_attr.attr, 893 &sensor_dev_attr_in4_alarm.dev_attr.attr, 894 &sensor_dev_attr_in5_alarm.dev_attr.attr, 895 &sensor_dev_attr_in6_alarm.dev_attr.attr, 896 &sensor_dev_attr_in7_alarm.dev_attr.attr, 897 898 &sensor_dev_attr_temp1_input.dev_attr.attr, 899 &sensor_dev_attr_temp2_input.dev_attr.attr, 900 &sensor_dev_attr_temp3_input.dev_attr.attr, 901 &sensor_dev_attr_temp1_max.dev_attr.attr, 902 &sensor_dev_attr_temp2_max.dev_attr.attr, 903 &sensor_dev_attr_temp3_max.dev_attr.attr, 904 &sensor_dev_attr_temp1_min.dev_attr.attr, 905 &sensor_dev_attr_temp2_min.dev_attr.attr, 906 &sensor_dev_attr_temp3_min.dev_attr.attr, 907 &sensor_dev_attr_temp1_type.dev_attr.attr, 908 &sensor_dev_attr_temp2_type.dev_attr.attr, 909 &sensor_dev_attr_temp3_type.dev_attr.attr, 910 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 911 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 912 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 913 914 &dev_attr_alarms.attr, 915 &dev_attr_name.attr, 916 NULL 917 }; 918 919 static const struct attribute_group it87_group = { 920 .attrs = it87_attributes, 921 }; 922 923 static struct attribute *it87_attributes_opt[] = { 924 &sensor_dev_attr_fan1_input16.dev_attr.attr, 925 &sensor_dev_attr_fan1_min16.dev_attr.attr, 926 &sensor_dev_attr_fan2_input16.dev_attr.attr, 927 &sensor_dev_attr_fan2_min16.dev_attr.attr, 928 &sensor_dev_attr_fan3_input16.dev_attr.attr, 929 &sensor_dev_attr_fan3_min16.dev_attr.attr, 930 &sensor_dev_attr_fan4_input16.dev_attr.attr, 931 &sensor_dev_attr_fan4_min16.dev_attr.attr, 932 &sensor_dev_attr_fan5_input16.dev_attr.attr, 933 &sensor_dev_attr_fan5_min16.dev_attr.attr, 934 935 &sensor_dev_attr_fan1_input.dev_attr.attr, 936 &sensor_dev_attr_fan1_min.dev_attr.attr, 937 &sensor_dev_attr_fan1_div.dev_attr.attr, 938 &sensor_dev_attr_fan2_input.dev_attr.attr, 939 &sensor_dev_attr_fan2_min.dev_attr.attr, 940 &sensor_dev_attr_fan2_div.dev_attr.attr, 941 &sensor_dev_attr_fan3_input.dev_attr.attr, 942 &sensor_dev_attr_fan3_min.dev_attr.attr, 943 &sensor_dev_attr_fan3_div.dev_attr.attr, 944 945 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 946 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 947 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 948 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 949 &sensor_dev_attr_fan5_alarm.dev_attr.attr, 950 951 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 952 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 953 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 954 &sensor_dev_attr_pwm1.dev_attr.attr, 955 &sensor_dev_attr_pwm2.dev_attr.attr, 956 &sensor_dev_attr_pwm3.dev_attr.attr, 957 &dev_attr_pwm1_freq.attr, 958 &dev_attr_pwm2_freq.attr, 959 &dev_attr_pwm3_freq.attr, 960 961 &dev_attr_vrm.attr, 962 &dev_attr_cpu0_vid.attr, 963 NULL 964 }; 965 966 static const struct attribute_group it87_group_opt = { 967 .attrs = it87_attributes_opt, 968 }; 969 970 /* SuperIO detection - will change isa_address if a chip is found */ 971 static int __init it87_find(unsigned short *address, 972 struct it87_sio_data *sio_data) 973 { 974 int err = -ENODEV; 975 u16 chip_type; 976 const char *board_vendor, *board_name; 977 978 superio_enter(); 979 chip_type = force_id ? force_id : superio_inw(DEVID); 980 981 switch (chip_type) { 982 case IT8705F_DEVID: 983 sio_data->type = it87; 984 break; 985 case IT8712F_DEVID: 986 sio_data->type = it8712; 987 break; 988 case IT8716F_DEVID: 989 case IT8726F_DEVID: 990 sio_data->type = it8716; 991 break; 992 case IT8718F_DEVID: 993 sio_data->type = it8718; 994 break; 995 case 0xffff: /* No device at all */ 996 goto exit; 997 default: 998 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n", 999 chip_type); 1000 goto exit; 1001 } 1002 1003 superio_select(PME); 1004 if (!(superio_inb(IT87_ACT_REG) & 0x01)) { 1005 pr_info("it87: Device not activated, skipping\n"); 1006 goto exit; 1007 } 1008 1009 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1); 1010 if (*address == 0) { 1011 pr_info("it87: Base address not set, skipping\n"); 1012 goto exit; 1013 } 1014 1015 err = 0; 1016 sio_data->revision = superio_inb(DEVREV) & 0x0f; 1017 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n", 1018 chip_type, *address, sio_data->revision); 1019 1020 /* Read GPIO config and VID value from LDN 7 (GPIO) */ 1021 if (chip_type != IT8705F_DEVID) { 1022 int reg; 1023 1024 superio_select(GPIO); 1025 if (chip_type == it8718) 1026 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG); 1027 1028 reg = superio_inb(IT87_SIO_PINX2_REG); 1029 if (reg & (1 << 0)) 1030 pr_info("it87: in3 is VCC (+5V)\n"); 1031 if (reg & (1 << 1)) 1032 pr_info("it87: in7 is VCCH (+5V Stand-By)\n"); 1033 } 1034 1035 /* Disable specific features based on DMI strings */ 1036 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR); 1037 board_name = dmi_get_system_info(DMI_BOARD_NAME); 1038 if (board_vendor && board_name) { 1039 if (strcmp(board_vendor, "nVIDIA") == 0 1040 && strcmp(board_name, "FN68PT") == 0) { 1041 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not 1042 connected to a fan, but to something else. One user 1043 has reported instant system power-off when changing 1044 the PWM2 duty cycle, so we disable it. 1045 I use the board name string as the trigger in case 1046 the same board is ever used in other systems. */ 1047 pr_info("it87: Disabling pwm2 due to " 1048 "hardware constraints\n"); 1049 sio_data->skip_pwm = (1 << 1); 1050 } 1051 } 1052 1053 exit: 1054 superio_exit(); 1055 return err; 1056 } 1057 1058 static int __devinit it87_probe(struct platform_device *pdev) 1059 { 1060 struct it87_data *data; 1061 struct resource *res; 1062 struct device *dev = &pdev->dev; 1063 struct it87_sio_data *sio_data = dev->platform_data; 1064 int err = 0; 1065 int enable_pwm_interface; 1066 static const char *names[] = { 1067 "it87", 1068 "it8712", 1069 "it8716", 1070 "it8718", 1071 }; 1072 1073 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1074 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) { 1075 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", 1076 (unsigned long)res->start, 1077 (unsigned long)(res->start + IT87_EC_EXTENT - 1)); 1078 err = -EBUSY; 1079 goto ERROR0; 1080 } 1081 1082 if (!(data = kzalloc(sizeof(struct it87_data), GFP_KERNEL))) { 1083 err = -ENOMEM; 1084 goto ERROR1; 1085 } 1086 1087 data->addr = res->start; 1088 data->type = sio_data->type; 1089 data->revision = sio_data->revision; 1090 data->name = names[sio_data->type]; 1091 1092 /* Now, we do the remaining detection. */ 1093 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80) 1094 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) { 1095 err = -ENODEV; 1096 goto ERROR2; 1097 } 1098 1099 platform_set_drvdata(pdev, data); 1100 1101 mutex_init(&data->update_lock); 1102 1103 /* Check PWM configuration */ 1104 enable_pwm_interface = it87_check_pwm(dev); 1105 1106 /* Initialize the IT87 chip */ 1107 it87_init_device(pdev); 1108 1109 /* Register sysfs hooks */ 1110 if ((err = sysfs_create_group(&dev->kobj, &it87_group))) 1111 goto ERROR2; 1112 1113 /* Do not create fan files for disabled fans */ 1114 if (has_16bit_fans(data)) { 1115 /* 16-bit tachometers */ 1116 if (data->has_fan & (1 << 0)) { 1117 if ((err = device_create_file(dev, 1118 &sensor_dev_attr_fan1_input16.dev_attr)) 1119 || (err = device_create_file(dev, 1120 &sensor_dev_attr_fan1_min16.dev_attr)) 1121 || (err = device_create_file(dev, 1122 &sensor_dev_attr_fan1_alarm.dev_attr))) 1123 goto ERROR4; 1124 } 1125 if (data->has_fan & (1 << 1)) { 1126 if ((err = device_create_file(dev, 1127 &sensor_dev_attr_fan2_input16.dev_attr)) 1128 || (err = device_create_file(dev, 1129 &sensor_dev_attr_fan2_min16.dev_attr)) 1130 || (err = device_create_file(dev, 1131 &sensor_dev_attr_fan2_alarm.dev_attr))) 1132 goto ERROR4; 1133 } 1134 if (data->has_fan & (1 << 2)) { 1135 if ((err = device_create_file(dev, 1136 &sensor_dev_attr_fan3_input16.dev_attr)) 1137 || (err = device_create_file(dev, 1138 &sensor_dev_attr_fan3_min16.dev_attr)) 1139 || (err = device_create_file(dev, 1140 &sensor_dev_attr_fan3_alarm.dev_attr))) 1141 goto ERROR4; 1142 } 1143 if (data->has_fan & (1 << 3)) { 1144 if ((err = device_create_file(dev, 1145 &sensor_dev_attr_fan4_input16.dev_attr)) 1146 || (err = device_create_file(dev, 1147 &sensor_dev_attr_fan4_min16.dev_attr)) 1148 || (err = device_create_file(dev, 1149 &sensor_dev_attr_fan4_alarm.dev_attr))) 1150 goto ERROR4; 1151 } 1152 if (data->has_fan & (1 << 4)) { 1153 if ((err = device_create_file(dev, 1154 &sensor_dev_attr_fan5_input16.dev_attr)) 1155 || (err = device_create_file(dev, 1156 &sensor_dev_attr_fan5_min16.dev_attr)) 1157 || (err = device_create_file(dev, 1158 &sensor_dev_attr_fan5_alarm.dev_attr))) 1159 goto ERROR4; 1160 } 1161 } else { 1162 /* 8-bit tachometers with clock divider */ 1163 if (data->has_fan & (1 << 0)) { 1164 if ((err = device_create_file(dev, 1165 &sensor_dev_attr_fan1_input.dev_attr)) 1166 || (err = device_create_file(dev, 1167 &sensor_dev_attr_fan1_min.dev_attr)) 1168 || (err = device_create_file(dev, 1169 &sensor_dev_attr_fan1_div.dev_attr)) 1170 || (err = device_create_file(dev, 1171 &sensor_dev_attr_fan1_alarm.dev_attr))) 1172 goto ERROR4; 1173 } 1174 if (data->has_fan & (1 << 1)) { 1175 if ((err = device_create_file(dev, 1176 &sensor_dev_attr_fan2_input.dev_attr)) 1177 || (err = device_create_file(dev, 1178 &sensor_dev_attr_fan2_min.dev_attr)) 1179 || (err = device_create_file(dev, 1180 &sensor_dev_attr_fan2_div.dev_attr)) 1181 || (err = device_create_file(dev, 1182 &sensor_dev_attr_fan2_alarm.dev_attr))) 1183 goto ERROR4; 1184 } 1185 if (data->has_fan & (1 << 2)) { 1186 if ((err = device_create_file(dev, 1187 &sensor_dev_attr_fan3_input.dev_attr)) 1188 || (err = device_create_file(dev, 1189 &sensor_dev_attr_fan3_min.dev_attr)) 1190 || (err = device_create_file(dev, 1191 &sensor_dev_attr_fan3_div.dev_attr)) 1192 || (err = device_create_file(dev, 1193 &sensor_dev_attr_fan3_alarm.dev_attr))) 1194 goto ERROR4; 1195 } 1196 } 1197 1198 if (enable_pwm_interface) { 1199 if (!(sio_data->skip_pwm & (1 << 0))) { 1200 if ((err = device_create_file(dev, 1201 &sensor_dev_attr_pwm1_enable.dev_attr)) 1202 || (err = device_create_file(dev, 1203 &sensor_dev_attr_pwm1.dev_attr)) 1204 || (err = device_create_file(dev, 1205 &dev_attr_pwm1_freq))) 1206 goto ERROR4; 1207 } 1208 if (!(sio_data->skip_pwm & (1 << 1))) { 1209 if ((err = device_create_file(dev, 1210 &sensor_dev_attr_pwm2_enable.dev_attr)) 1211 || (err = device_create_file(dev, 1212 &sensor_dev_attr_pwm2.dev_attr)) 1213 || (err = device_create_file(dev, 1214 &dev_attr_pwm2_freq))) 1215 goto ERROR4; 1216 } 1217 if (!(sio_data->skip_pwm & (1 << 2))) { 1218 if ((err = device_create_file(dev, 1219 &sensor_dev_attr_pwm3_enable.dev_attr)) 1220 || (err = device_create_file(dev, 1221 &sensor_dev_attr_pwm3.dev_attr)) 1222 || (err = device_create_file(dev, 1223 &dev_attr_pwm3_freq))) 1224 goto ERROR4; 1225 } 1226 } 1227 1228 if (data->type == it8712 || data->type == it8716 1229 || data->type == it8718) { 1230 data->vrm = vid_which_vrm(); 1231 /* VID reading from Super-I/O config space if available */ 1232 data->vid = sio_data->vid_value; 1233 if ((err = device_create_file(dev, 1234 &dev_attr_vrm)) 1235 || (err = device_create_file(dev, 1236 &dev_attr_cpu0_vid))) 1237 goto ERROR4; 1238 } 1239 1240 data->hwmon_dev = hwmon_device_register(dev); 1241 if (IS_ERR(data->hwmon_dev)) { 1242 err = PTR_ERR(data->hwmon_dev); 1243 goto ERROR4; 1244 } 1245 1246 return 0; 1247 1248 ERROR4: 1249 sysfs_remove_group(&dev->kobj, &it87_group); 1250 sysfs_remove_group(&dev->kobj, &it87_group_opt); 1251 ERROR2: 1252 platform_set_drvdata(pdev, NULL); 1253 kfree(data); 1254 ERROR1: 1255 release_region(res->start, IT87_EC_EXTENT); 1256 ERROR0: 1257 return err; 1258 } 1259 1260 static int __devexit it87_remove(struct platform_device *pdev) 1261 { 1262 struct it87_data *data = platform_get_drvdata(pdev); 1263 1264 hwmon_device_unregister(data->hwmon_dev); 1265 sysfs_remove_group(&pdev->dev.kobj, &it87_group); 1266 sysfs_remove_group(&pdev->dev.kobj, &it87_group_opt); 1267 1268 release_region(data->addr, IT87_EC_EXTENT); 1269 platform_set_drvdata(pdev, NULL); 1270 kfree(data); 1271 1272 return 0; 1273 } 1274 1275 /* Must be called with data->update_lock held, except during initialization. 1276 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1277 would slow down the IT87 access and should not be necessary. */ 1278 static int it87_read_value(struct it87_data *data, u8 reg) 1279 { 1280 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1281 return inb_p(data->addr + IT87_DATA_REG_OFFSET); 1282 } 1283 1284 /* Must be called with data->update_lock held, except during initialization. 1285 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks, 1286 would slow down the IT87 access and should not be necessary. */ 1287 static void it87_write_value(struct it87_data *data, u8 reg, u8 value) 1288 { 1289 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET); 1290 outb_p(value, data->addr + IT87_DATA_REG_OFFSET); 1291 } 1292 1293 /* Return 1 if and only if the PWM interface is safe to use */ 1294 static int __devinit it87_check_pwm(struct device *dev) 1295 { 1296 struct it87_data *data = dev_get_drvdata(dev); 1297 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off 1298 * and polarity set to active low is sign that this is the case so we 1299 * disable pwm control to protect the user. */ 1300 int tmp = it87_read_value(data, IT87_REG_FAN_CTL); 1301 if ((tmp & 0x87) == 0) { 1302 if (fix_pwm_polarity) { 1303 /* The user asks us to attempt a chip reconfiguration. 1304 * This means switching to active high polarity and 1305 * inverting all fan speed values. */ 1306 int i; 1307 u8 pwm[3]; 1308 1309 for (i = 0; i < 3; i++) 1310 pwm[i] = it87_read_value(data, 1311 IT87_REG_PWM(i)); 1312 1313 /* If any fan is in automatic pwm mode, the polarity 1314 * might be correct, as suspicious as it seems, so we 1315 * better don't change anything (but still disable the 1316 * PWM interface). */ 1317 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) { 1318 dev_info(dev, "Reconfiguring PWM to " 1319 "active high polarity\n"); 1320 it87_write_value(data, IT87_REG_FAN_CTL, 1321 tmp | 0x87); 1322 for (i = 0; i < 3; i++) 1323 it87_write_value(data, 1324 IT87_REG_PWM(i), 1325 0x7f & ~pwm[i]); 1326 return 1; 1327 } 1328 1329 dev_info(dev, "PWM configuration is " 1330 "too broken to be fixed\n"); 1331 } 1332 1333 dev_info(dev, "Detected broken BIOS " 1334 "defaults, disabling PWM interface\n"); 1335 return 0; 1336 } else if (fix_pwm_polarity) { 1337 dev_info(dev, "PWM configuration looks " 1338 "sane, won't touch\n"); 1339 } 1340 1341 return 1; 1342 } 1343 1344 /* Called when we have found a new IT87. */ 1345 static void __devinit it87_init_device(struct platform_device *pdev) 1346 { 1347 struct it87_data *data = platform_get_drvdata(pdev); 1348 int tmp, i; 1349 1350 /* initialize to sane defaults: 1351 * - if the chip is in manual pwm mode, this will be overwritten with 1352 * the actual settings on the chip (so in this case, initialization 1353 * is not needed) 1354 * - if in automatic or on/off mode, we could switch to manual mode, 1355 * read the registers and set manual_pwm_ctl accordingly, but currently 1356 * this is not implemented, so we initialize to something sane */ 1357 for (i = 0; i < 3; i++) { 1358 data->manual_pwm_ctl[i] = 0xff; 1359 } 1360 1361 /* Some chips seem to have default value 0xff for all limit 1362 * registers. For low voltage limits it makes no sense and triggers 1363 * alarms, so change to 0 instead. For high temperature limits, it 1364 * means -1 degree C, which surprisingly doesn't trigger an alarm, 1365 * but is still confusing, so change to 127 degrees C. */ 1366 for (i = 0; i < 8; i++) { 1367 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i)); 1368 if (tmp == 0xff) 1369 it87_write_value(data, IT87_REG_VIN_MIN(i), 0); 1370 } 1371 for (i = 0; i < 3; i++) { 1372 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1373 if (tmp == 0xff) 1374 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127); 1375 } 1376 1377 /* Check if temperature channnels are reset manually or by some reason */ 1378 tmp = it87_read_value(data, IT87_REG_TEMP_ENABLE); 1379 if ((tmp & 0x3f) == 0) { 1380 /* Temp1,Temp3=thermistor; Temp2=thermal diode */ 1381 tmp = (tmp & 0xc0) | 0x2a; 1382 it87_write_value(data, IT87_REG_TEMP_ENABLE, tmp); 1383 } 1384 data->sensor = tmp; 1385 1386 /* Check if voltage monitors are reset manually or by some reason */ 1387 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE); 1388 if ((tmp & 0xff) == 0) { 1389 /* Enable all voltage monitors */ 1390 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff); 1391 } 1392 1393 /* Check if tachometers are reset manually or by some reason */ 1394 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL); 1395 if ((data->fan_main_ctrl & 0x70) == 0) { 1396 /* Enable all fan tachometers */ 1397 data->fan_main_ctrl |= 0x70; 1398 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl); 1399 } 1400 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07; 1401 1402 /* Set tachometers to 16-bit mode if needed */ 1403 if (has_16bit_fans(data)) { 1404 tmp = it87_read_value(data, IT87_REG_FAN_16BIT); 1405 if (~tmp & 0x07 & data->has_fan) { 1406 dev_dbg(&pdev->dev, 1407 "Setting fan1-3 to 16-bit mode\n"); 1408 it87_write_value(data, IT87_REG_FAN_16BIT, 1409 tmp | 0x07); 1410 } 1411 /* IT8705F only supports three fans. */ 1412 if (data->type != it87) { 1413 if (tmp & (1 << 4)) 1414 data->has_fan |= (1 << 3); /* fan4 enabled */ 1415 if (tmp & (1 << 5)) 1416 data->has_fan |= (1 << 4); /* fan5 enabled */ 1417 } 1418 } 1419 1420 /* Set current fan mode registers and the default settings for the 1421 * other mode registers */ 1422 for (i = 0; i < 3; i++) { 1423 if (data->fan_main_ctrl & (1 << i)) { 1424 /* pwm mode */ 1425 tmp = it87_read_value(data, IT87_REG_PWM(i)); 1426 if (tmp & 0x80) { 1427 /* automatic pwm - not yet implemented, but 1428 * leave the settings made by the BIOS alone 1429 * until a change is requested via the sysfs 1430 * interface */ 1431 } else { 1432 /* manual pwm */ 1433 data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp); 1434 } 1435 } 1436 } 1437 1438 /* Start monitoring */ 1439 it87_write_value(data, IT87_REG_CONFIG, 1440 (it87_read_value(data, IT87_REG_CONFIG) & 0x36) 1441 | (update_vbat ? 0x41 : 0x01)); 1442 } 1443 1444 static struct it87_data *it87_update_device(struct device *dev) 1445 { 1446 struct it87_data *data = dev_get_drvdata(dev); 1447 int i; 1448 1449 mutex_lock(&data->update_lock); 1450 1451 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 1452 || !data->valid) { 1453 1454 if (update_vbat) { 1455 /* Cleared after each update, so reenable. Value 1456 returned by this read will be previous value */ 1457 it87_write_value(data, IT87_REG_CONFIG, 1458 it87_read_value(data, IT87_REG_CONFIG) | 0x40); 1459 } 1460 for (i = 0; i <= 7; i++) { 1461 data->in[i] = 1462 it87_read_value(data, IT87_REG_VIN(i)); 1463 data->in_min[i] = 1464 it87_read_value(data, IT87_REG_VIN_MIN(i)); 1465 data->in_max[i] = 1466 it87_read_value(data, IT87_REG_VIN_MAX(i)); 1467 } 1468 /* in8 (battery) has no limit registers */ 1469 data->in[8] = 1470 it87_read_value(data, IT87_REG_VIN(8)); 1471 1472 for (i = 0; i < 5; i++) { 1473 /* Skip disabled fans */ 1474 if (!(data->has_fan & (1 << i))) 1475 continue; 1476 1477 data->fan_min[i] = 1478 it87_read_value(data, IT87_REG_FAN_MIN[i]); 1479 data->fan[i] = it87_read_value(data, 1480 IT87_REG_FAN[i]); 1481 /* Add high byte if in 16-bit mode */ 1482 if (has_16bit_fans(data)) { 1483 data->fan[i] |= it87_read_value(data, 1484 IT87_REG_FANX[i]) << 8; 1485 data->fan_min[i] |= it87_read_value(data, 1486 IT87_REG_FANX_MIN[i]) << 8; 1487 } 1488 } 1489 for (i = 0; i < 3; i++) { 1490 data->temp[i] = 1491 it87_read_value(data, IT87_REG_TEMP(i)); 1492 data->temp_high[i] = 1493 it87_read_value(data, IT87_REG_TEMP_HIGH(i)); 1494 data->temp_low[i] = 1495 it87_read_value(data, IT87_REG_TEMP_LOW(i)); 1496 } 1497 1498 /* Newer chips don't have clock dividers */ 1499 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) { 1500 i = it87_read_value(data, IT87_REG_FAN_DIV); 1501 data->fan_div[0] = i & 0x07; 1502 data->fan_div[1] = (i >> 3) & 0x07; 1503 data->fan_div[2] = (i & 0x40) ? 3 : 1; 1504 } 1505 1506 data->alarms = 1507 it87_read_value(data, IT87_REG_ALARM1) | 1508 (it87_read_value(data, IT87_REG_ALARM2) << 8) | 1509 (it87_read_value(data, IT87_REG_ALARM3) << 16); 1510 data->fan_main_ctrl = it87_read_value(data, 1511 IT87_REG_FAN_MAIN_CTRL); 1512 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL); 1513 1514 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE); 1515 /* The 8705 does not have VID capability. 1516 The 8718 does not use IT87_REG_VID for the same purpose. */ 1517 if (data->type == it8712 || data->type == it8716) { 1518 data->vid = it87_read_value(data, IT87_REG_VID); 1519 /* The older IT8712F revisions had only 5 VID pins, 1520 but we assume it is always safe to read 6 bits. */ 1521 data->vid &= 0x3f; 1522 } 1523 data->last_updated = jiffies; 1524 data->valid = 1; 1525 } 1526 1527 mutex_unlock(&data->update_lock); 1528 1529 return data; 1530 } 1531 1532 static int __init it87_device_add(unsigned short address, 1533 const struct it87_sio_data *sio_data) 1534 { 1535 struct resource res = { 1536 .start = address + IT87_EC_OFFSET, 1537 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1, 1538 .name = DRVNAME, 1539 .flags = IORESOURCE_IO, 1540 }; 1541 int err; 1542 1543 pdev = platform_device_alloc(DRVNAME, address); 1544 if (!pdev) { 1545 err = -ENOMEM; 1546 printk(KERN_ERR DRVNAME ": Device allocation failed\n"); 1547 goto exit; 1548 } 1549 1550 err = platform_device_add_resources(pdev, &res, 1); 1551 if (err) { 1552 printk(KERN_ERR DRVNAME ": Device resource addition failed " 1553 "(%d)\n", err); 1554 goto exit_device_put; 1555 } 1556 1557 err = platform_device_add_data(pdev, sio_data, 1558 sizeof(struct it87_sio_data)); 1559 if (err) { 1560 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n"); 1561 goto exit_device_put; 1562 } 1563 1564 err = platform_device_add(pdev); 1565 if (err) { 1566 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", 1567 err); 1568 goto exit_device_put; 1569 } 1570 1571 return 0; 1572 1573 exit_device_put: 1574 platform_device_put(pdev); 1575 exit: 1576 return err; 1577 } 1578 1579 static int __init sm_it87_init(void) 1580 { 1581 int err; 1582 unsigned short isa_address=0; 1583 struct it87_sio_data sio_data; 1584 1585 memset(&sio_data, 0, sizeof(struct it87_sio_data)); 1586 err = it87_find(&isa_address, &sio_data); 1587 if (err) 1588 return err; 1589 err = platform_driver_register(&it87_driver); 1590 if (err) 1591 return err; 1592 1593 err = it87_device_add(isa_address, &sio_data); 1594 if (err){ 1595 platform_driver_unregister(&it87_driver); 1596 return err; 1597 } 1598 1599 return 0; 1600 } 1601 1602 static void __exit sm_it87_exit(void) 1603 { 1604 platform_device_unregister(pdev); 1605 platform_driver_unregister(&it87_driver); 1606 } 1607 1608 1609 MODULE_AUTHOR("Chris Gauthron, " 1610 "Jean Delvare <khali@linux-fr.org>"); 1611 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8726F, SiS950 driver"); 1612 module_param(update_vbat, bool, 0); 1613 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value"); 1614 module_param(fix_pwm_polarity, bool, 0); 1615 MODULE_PARM_DESC(fix_pwm_polarity, "Force PWM polarity to active high (DANGEROUS)"); 1616 MODULE_LICENSE("GPL"); 1617 1618 module_init(sm_it87_init); 1619 module_exit(sm_it87_exit); 1620