1 /* 2 * vt8231.c - Part of lm_sensors, Linux kernel modules 3 * for hardware monitoring 4 * 5 * Copyright (c) 2005 Roger Lucas <vt8231@hiddenengine.co.uk> 6 * Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com> 7 * Aaron M. Marsh <amarsh@sdf.lonestar.org> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22 */ 23 24 /* 25 * Supports VIA VT8231 South Bridge embedded sensors 26 */ 27 28 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 29 30 #include <linux/module.h> 31 #include <linux/init.h> 32 #include <linux/slab.h> 33 #include <linux/pci.h> 34 #include <linux/jiffies.h> 35 #include <linux/platform_device.h> 36 #include <linux/hwmon.h> 37 #include <linux/hwmon-sysfs.h> 38 #include <linux/hwmon-vid.h> 39 #include <linux/err.h> 40 #include <linux/mutex.h> 41 #include <linux/acpi.h> 42 #include <linux/io.h> 43 44 static int force_addr; 45 module_param(force_addr, int, 0); 46 MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors"); 47 48 static struct platform_device *pdev; 49 50 #define VT8231_EXTENT 0x80 51 #define VT8231_BASE_REG 0x70 52 #define VT8231_ENABLE_REG 0x74 53 54 /* 55 * The VT8231 registers 56 * 57 * The reset value for the input channel configuration is used (Reg 0x4A=0x07) 58 * which sets the selected inputs marked with '*' below if multiple options are 59 * possible: 60 * 61 * Voltage Mode Temperature Mode 62 * Sensor Linux Id Linux Id VIA Id 63 * -------- -------- -------- ------ 64 * CPU Diode N/A temp1 0 65 * UIC1 in0 temp2 * 1 66 * UIC2 in1 * temp3 2 67 * UIC3 in2 * temp4 3 68 * UIC4 in3 * temp5 4 69 * UIC5 in4 * temp6 5 70 * 3.3V in5 N/A 71 * 72 * Note that the BIOS may set the configuration register to a different value 73 * to match the motherboard configuration. 74 */ 75 76 /* fans numbered 0-1 */ 77 #define VT8231_REG_FAN_MIN(nr) (0x3b + (nr)) 78 #define VT8231_REG_FAN(nr) (0x29 + (nr)) 79 80 /* Voltage inputs numbered 0-5 */ 81 82 static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 }; 83 static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 }; 84 static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 }; 85 86 /* 87 * Temperatures are numbered 1-6 according to the Linux kernel specification. 88 * 89 * In the VIA datasheet, however, the temperatures are numbered from zero. 90 * Since it is important that this driver can easily be compared to the VIA 91 * datasheet, we will use the VIA numbering within this driver and map the 92 * kernel sysfs device name to the VIA number in the sysfs callback. 93 */ 94 95 #define VT8231_REG_TEMP_LOW01 0x49 96 #define VT8231_REG_TEMP_LOW25 0x4d 97 98 static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 }; 99 static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 }; 100 static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 }; 101 102 #define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210) 103 #define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210) 104 #define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200) 105 106 #define VT8231_REG_CONFIG 0x40 107 #define VT8231_REG_ALARM1 0x41 108 #define VT8231_REG_ALARM2 0x42 109 #define VT8231_REG_FANDIV 0x47 110 #define VT8231_REG_UCH_CONFIG 0x4a 111 #define VT8231_REG_TEMP1_CONFIG 0x4b 112 #define VT8231_REG_TEMP2_CONFIG 0x4c 113 114 /* 115 * temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux 116 * numbering 117 */ 118 #define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \ 119 ((ch_config) >> ((i)+1)) & 0x01) 120 /* voltages 0-5 */ 121 #define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \ 122 !(((ch_config) >> ((i)+2)) & 0x01)) 123 124 #define DIV_FROM_REG(val) (1 << (val)) 125 126 /* 127 * NB The values returned here are NOT temperatures. The calibration curves 128 * for the thermistor curves are board-specific and must go in the 129 * sensors.conf file. Temperature sensors are actually ten bits, but the 130 * VIA datasheet only considers the 8 MSBs obtained from the regtemp[] 131 * register. The temperature value returned should have a magnitude of 3, 132 * so we use the VIA scaling as the "true" scaling and use the remaining 2 133 * LSBs as fractional precision. 134 * 135 * All the on-chip hardware temperature comparisons for the alarms are only 136 * 8-bits wide, and compare against the 8 MSBs of the temperature. The bits 137 * in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are 138 * ignored. 139 */ 140 141 /* 142 ****** FAN RPM CONVERSIONS ******** 143 * This chip saturates back at 0, not at 255 like many the other chips. 144 * So, 0 means 0 RPM 145 */ 146 static inline u8 FAN_TO_REG(long rpm, int div) 147 { 148 if (rpm <= 0 || rpm > 1310720) 149 return 0; 150 return clamp_val(1310720 / (rpm * div), 1, 255); 151 } 152 153 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div))) 154 155 struct vt8231_data { 156 unsigned short addr; 157 const char *name; 158 159 struct mutex update_lock; 160 struct device *hwmon_dev; 161 char valid; /* !=0 if following fields are valid */ 162 unsigned long last_updated; /* In jiffies */ 163 164 u8 in[6]; /* Register value */ 165 u8 in_max[6]; /* Register value */ 166 u8 in_min[6]; /* Register value */ 167 u16 temp[6]; /* Register value 10 bit, right aligned */ 168 u8 temp_max[6]; /* Register value */ 169 u8 temp_min[6]; /* Register value */ 170 u8 fan[2]; /* Register value */ 171 u8 fan_min[2]; /* Register value */ 172 u8 fan_div[2]; /* Register encoding, shifted right */ 173 u16 alarms; /* Register encoding */ 174 u8 uch_config; 175 }; 176 177 static struct pci_dev *s_bridge; 178 static int vt8231_probe(struct platform_device *pdev); 179 static int vt8231_remove(struct platform_device *pdev); 180 static struct vt8231_data *vt8231_update_device(struct device *dev); 181 static void vt8231_init_device(struct vt8231_data *data); 182 183 static inline int vt8231_read_value(struct vt8231_data *data, u8 reg) 184 { 185 return inb_p(data->addr + reg); 186 } 187 188 static inline void vt8231_write_value(struct vt8231_data *data, u8 reg, 189 u8 value) 190 { 191 outb_p(value, data->addr + reg); 192 } 193 194 /* following are the sysfs callback functions */ 195 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 196 char *buf) 197 { 198 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 199 int nr = sensor_attr->index; 200 struct vt8231_data *data = vt8231_update_device(dev); 201 202 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958); 203 } 204 205 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 206 char *buf) 207 { 208 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 209 int nr = sensor_attr->index; 210 struct vt8231_data *data = vt8231_update_device(dev); 211 212 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958); 213 } 214 215 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 216 char *buf) 217 { 218 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 219 int nr = sensor_attr->index; 220 struct vt8231_data *data = vt8231_update_device(dev); 221 222 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958)); 223 } 224 225 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 226 const char *buf, size_t count) 227 { 228 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 229 int nr = sensor_attr->index; 230 struct vt8231_data *data = dev_get_drvdata(dev); 231 unsigned long val; 232 int err; 233 234 err = kstrtoul(buf, 10, &val); 235 if (err) 236 return err; 237 238 mutex_lock(&data->update_lock); 239 data->in_min[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255); 240 vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]); 241 mutex_unlock(&data->update_lock); 242 return count; 243 } 244 245 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 246 const char *buf, size_t count) 247 { 248 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 249 int nr = sensor_attr->index; 250 struct vt8231_data *data = dev_get_drvdata(dev); 251 unsigned long val; 252 int err; 253 254 err = kstrtoul(buf, 10, &val); 255 if (err) 256 return err; 257 258 mutex_lock(&data->update_lock); 259 data->in_max[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255); 260 vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]); 261 mutex_unlock(&data->update_lock); 262 return count; 263 } 264 265 /* Special case for input 5 as this has 3.3V scaling built into the chip */ 266 static ssize_t in5_input_show(struct device *dev, 267 struct device_attribute *attr, char *buf) 268 { 269 struct vt8231_data *data = vt8231_update_device(dev); 270 271 return sprintf(buf, "%d\n", 272 (((data->in[5] - 3) * 10000 * 54) / (958 * 34))); 273 } 274 275 static ssize_t in5_min_show(struct device *dev, struct device_attribute *attr, 276 char *buf) 277 { 278 struct vt8231_data *data = vt8231_update_device(dev); 279 280 return sprintf(buf, "%d\n", 281 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34))); 282 } 283 284 static ssize_t in5_max_show(struct device *dev, struct device_attribute *attr, 285 char *buf) 286 { 287 struct vt8231_data *data = vt8231_update_device(dev); 288 289 return sprintf(buf, "%d\n", 290 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34))); 291 } 292 293 static ssize_t in5_min_store(struct device *dev, 294 struct device_attribute *attr, const char *buf, 295 size_t count) 296 { 297 struct vt8231_data *data = dev_get_drvdata(dev); 298 unsigned long val; 299 int err; 300 301 err = kstrtoul(buf, 10, &val); 302 if (err) 303 return err; 304 305 mutex_lock(&data->update_lock); 306 data->in_min[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3, 307 0, 255); 308 vt8231_write_value(data, regvoltmin[5], data->in_min[5]); 309 mutex_unlock(&data->update_lock); 310 return count; 311 } 312 313 static ssize_t in5_max_store(struct device *dev, 314 struct device_attribute *attr, const char *buf, 315 size_t count) 316 { 317 struct vt8231_data *data = dev_get_drvdata(dev); 318 unsigned long val; 319 int err; 320 321 err = kstrtoul(buf, 10, &val); 322 if (err) 323 return err; 324 325 mutex_lock(&data->update_lock); 326 data->in_max[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3, 327 0, 255); 328 vt8231_write_value(data, regvoltmax[5], data->in_max[5]); 329 mutex_unlock(&data->update_lock); 330 return count; 331 } 332 333 #define define_voltage_sysfs(offset) \ 334 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 335 show_in, NULL, offset); \ 336 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 337 show_in_min, set_in_min, offset); \ 338 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 339 show_in_max, set_in_max, offset) 340 341 define_voltage_sysfs(0); 342 define_voltage_sysfs(1); 343 define_voltage_sysfs(2); 344 define_voltage_sysfs(3); 345 define_voltage_sysfs(4); 346 347 static DEVICE_ATTR_RO(in5_input); 348 static DEVICE_ATTR_RW(in5_min); 349 static DEVICE_ATTR_RW(in5_max); 350 351 /* Temperatures */ 352 static ssize_t temp1_input_show(struct device *dev, 353 struct device_attribute *attr, char *buf) 354 { 355 struct vt8231_data *data = vt8231_update_device(dev); 356 return sprintf(buf, "%d\n", data->temp[0] * 250); 357 } 358 359 static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr, 360 char *buf) 361 { 362 struct vt8231_data *data = vt8231_update_device(dev); 363 return sprintf(buf, "%d\n", data->temp_max[0] * 1000); 364 } 365 366 static ssize_t temp1_max_hyst_show(struct device *dev, 367 struct device_attribute *attr, char *buf) 368 { 369 struct vt8231_data *data = vt8231_update_device(dev); 370 return sprintf(buf, "%d\n", data->temp_min[0] * 1000); 371 } 372 373 static ssize_t temp1_max_store(struct device *dev, 374 struct device_attribute *attr, const char *buf, 375 size_t count) 376 { 377 struct vt8231_data *data = dev_get_drvdata(dev); 378 long val; 379 int err; 380 381 err = kstrtol(buf, 10, &val); 382 if (err) 383 return err; 384 385 mutex_lock(&data->update_lock); 386 data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255); 387 vt8231_write_value(data, regtempmax[0], data->temp_max[0]); 388 mutex_unlock(&data->update_lock); 389 return count; 390 } 391 static ssize_t temp1_max_hyst_store(struct device *dev, 392 struct device_attribute *attr, 393 const char *buf, size_t count) 394 { 395 struct vt8231_data *data = dev_get_drvdata(dev); 396 long val; 397 int err; 398 399 err = kstrtol(buf, 10, &val); 400 if (err) 401 return err; 402 403 mutex_lock(&data->update_lock); 404 data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255); 405 vt8231_write_value(data, regtempmin[0], data->temp_min[0]); 406 mutex_unlock(&data->update_lock); 407 return count; 408 } 409 410 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 411 char *buf) 412 { 413 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 414 int nr = sensor_attr->index; 415 struct vt8231_data *data = vt8231_update_device(dev); 416 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 417 } 418 419 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 420 char *buf) 421 { 422 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 423 int nr = sensor_attr->index; 424 struct vt8231_data *data = vt8231_update_device(dev); 425 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr])); 426 } 427 428 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 429 char *buf) 430 { 431 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 432 int nr = sensor_attr->index; 433 struct vt8231_data *data = vt8231_update_device(dev); 434 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr])); 435 } 436 437 static ssize_t set_temp_max(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 struct vt8231_data *data = dev_get_drvdata(dev); 443 long val; 444 int err; 445 446 err = kstrtol(buf, 10, &val); 447 if (err) 448 return err; 449 450 mutex_lock(&data->update_lock); 451 data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255); 452 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]); 453 mutex_unlock(&data->update_lock); 454 return count; 455 } 456 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 457 const char *buf, size_t count) 458 { 459 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 460 int nr = sensor_attr->index; 461 struct vt8231_data *data = dev_get_drvdata(dev); 462 long val; 463 int err; 464 465 err = kstrtol(buf, 10, &val); 466 if (err) 467 return err; 468 469 mutex_lock(&data->update_lock); 470 data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255); 471 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]); 472 mutex_unlock(&data->update_lock); 473 return count; 474 } 475 476 /* 477 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA 478 * temperature sensor numbering (0-5) 479 */ 480 #define define_temperature_sysfs(offset) \ 481 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 482 show_temp, NULL, offset - 1); \ 483 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 484 show_temp_max, set_temp_max, offset - 1); \ 485 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ 486 show_temp_min, set_temp_min, offset - 1) 487 488 static DEVICE_ATTR_RO(temp1_input); 489 static DEVICE_ATTR_RW(temp1_max); 490 static DEVICE_ATTR_RW(temp1_max_hyst); 491 492 define_temperature_sysfs(2); 493 define_temperature_sysfs(3); 494 define_temperature_sysfs(4); 495 define_temperature_sysfs(5); 496 define_temperature_sysfs(6); 497 498 /* Fans */ 499 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 500 char *buf) 501 { 502 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 503 int nr = sensor_attr->index; 504 struct vt8231_data *data = vt8231_update_device(dev); 505 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 506 DIV_FROM_REG(data->fan_div[nr]))); 507 } 508 509 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 510 char *buf) 511 { 512 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 513 int nr = sensor_attr->index; 514 struct vt8231_data *data = vt8231_update_device(dev); 515 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 516 DIV_FROM_REG(data->fan_div[nr]))); 517 } 518 519 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 520 char *buf) 521 { 522 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 523 int nr = sensor_attr->index; 524 struct vt8231_data *data = vt8231_update_device(dev); 525 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 526 } 527 528 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 529 const char *buf, size_t count) 530 { 531 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 532 int nr = sensor_attr->index; 533 struct vt8231_data *data = dev_get_drvdata(dev); 534 unsigned long val; 535 int err; 536 537 err = kstrtoul(buf, 10, &val); 538 if (err) 539 return err; 540 541 mutex_lock(&data->update_lock); 542 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 543 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 544 mutex_unlock(&data->update_lock); 545 return count; 546 } 547 548 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 549 const char *buf, size_t count) 550 { 551 struct vt8231_data *data = dev_get_drvdata(dev); 552 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 553 unsigned long val; 554 int nr = sensor_attr->index; 555 int old = vt8231_read_value(data, VT8231_REG_FANDIV); 556 long min = FAN_FROM_REG(data->fan_min[nr], 557 DIV_FROM_REG(data->fan_div[nr])); 558 int err; 559 560 err = kstrtoul(buf, 10, &val); 561 if (err) 562 return err; 563 564 mutex_lock(&data->update_lock); 565 switch (val) { 566 case 1: 567 data->fan_div[nr] = 0; 568 break; 569 case 2: 570 data->fan_div[nr] = 1; 571 break; 572 case 4: 573 data->fan_div[nr] = 2; 574 break; 575 case 8: 576 data->fan_div[nr] = 3; 577 break; 578 default: 579 dev_err(dev, 580 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", 581 val); 582 mutex_unlock(&data->update_lock); 583 return -EINVAL; 584 } 585 586 /* Correct the fan minimum speed */ 587 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 588 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 589 590 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); 591 vt8231_write_value(data, VT8231_REG_FANDIV, old); 592 mutex_unlock(&data->update_lock); 593 return count; 594 } 595 596 597 #define define_fan_sysfs(offset) \ 598 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 599 show_fan, NULL, offset - 1); \ 600 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 601 show_fan_div, set_fan_div, offset - 1); \ 602 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 603 show_fan_min, set_fan_min, offset - 1) 604 605 define_fan_sysfs(1); 606 define_fan_sysfs(2); 607 608 /* Alarms */ 609 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, 610 char *buf) 611 { 612 struct vt8231_data *data = vt8231_update_device(dev); 613 return sprintf(buf, "%d\n", data->alarms); 614 } 615 static DEVICE_ATTR_RO(alarms); 616 617 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 618 char *buf) 619 { 620 int bitnr = to_sensor_dev_attr(attr)->index; 621 struct vt8231_data *data = vt8231_update_device(dev); 622 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 623 } 624 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 625 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11); 626 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0); 627 static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1); 628 static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 3); 629 static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 8); 630 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 11); 631 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0); 632 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 1); 633 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 634 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 635 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 2); 636 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 637 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 638 639 static ssize_t name_show(struct device *dev, struct device_attribute 640 *devattr, char *buf) 641 { 642 struct vt8231_data *data = dev_get_drvdata(dev); 643 return sprintf(buf, "%s\n", data->name); 644 } 645 static DEVICE_ATTR_RO(name); 646 647 static struct attribute *vt8231_attributes_temps[6][5] = { 648 { 649 &dev_attr_temp1_input.attr, 650 &dev_attr_temp1_max_hyst.attr, 651 &dev_attr_temp1_max.attr, 652 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 653 NULL 654 }, { 655 &sensor_dev_attr_temp2_input.dev_attr.attr, 656 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 657 &sensor_dev_attr_temp2_max.dev_attr.attr, 658 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 659 NULL 660 }, { 661 &sensor_dev_attr_temp3_input.dev_attr.attr, 662 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, 663 &sensor_dev_attr_temp3_max.dev_attr.attr, 664 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 665 NULL 666 }, { 667 &sensor_dev_attr_temp4_input.dev_attr.attr, 668 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, 669 &sensor_dev_attr_temp4_max.dev_attr.attr, 670 &sensor_dev_attr_temp4_alarm.dev_attr.attr, 671 NULL 672 }, { 673 &sensor_dev_attr_temp5_input.dev_attr.attr, 674 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, 675 &sensor_dev_attr_temp5_max.dev_attr.attr, 676 &sensor_dev_attr_temp5_alarm.dev_attr.attr, 677 NULL 678 }, { 679 &sensor_dev_attr_temp6_input.dev_attr.attr, 680 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr, 681 &sensor_dev_attr_temp6_max.dev_attr.attr, 682 &sensor_dev_attr_temp6_alarm.dev_attr.attr, 683 NULL 684 } 685 }; 686 687 static const struct attribute_group vt8231_group_temps[6] = { 688 { .attrs = vt8231_attributes_temps[0] }, 689 { .attrs = vt8231_attributes_temps[1] }, 690 { .attrs = vt8231_attributes_temps[2] }, 691 { .attrs = vt8231_attributes_temps[3] }, 692 { .attrs = vt8231_attributes_temps[4] }, 693 { .attrs = vt8231_attributes_temps[5] }, 694 }; 695 696 static struct attribute *vt8231_attributes_volts[6][5] = { 697 { 698 &sensor_dev_attr_in0_input.dev_attr.attr, 699 &sensor_dev_attr_in0_min.dev_attr.attr, 700 &sensor_dev_attr_in0_max.dev_attr.attr, 701 &sensor_dev_attr_in0_alarm.dev_attr.attr, 702 NULL 703 }, { 704 &sensor_dev_attr_in1_input.dev_attr.attr, 705 &sensor_dev_attr_in1_min.dev_attr.attr, 706 &sensor_dev_attr_in1_max.dev_attr.attr, 707 &sensor_dev_attr_in1_alarm.dev_attr.attr, 708 NULL 709 }, { 710 &sensor_dev_attr_in2_input.dev_attr.attr, 711 &sensor_dev_attr_in2_min.dev_attr.attr, 712 &sensor_dev_attr_in2_max.dev_attr.attr, 713 &sensor_dev_attr_in2_alarm.dev_attr.attr, 714 NULL 715 }, { 716 &sensor_dev_attr_in3_input.dev_attr.attr, 717 &sensor_dev_attr_in3_min.dev_attr.attr, 718 &sensor_dev_attr_in3_max.dev_attr.attr, 719 &sensor_dev_attr_in3_alarm.dev_attr.attr, 720 NULL 721 }, { 722 &sensor_dev_attr_in4_input.dev_attr.attr, 723 &sensor_dev_attr_in4_min.dev_attr.attr, 724 &sensor_dev_attr_in4_max.dev_attr.attr, 725 &sensor_dev_attr_in4_alarm.dev_attr.attr, 726 NULL 727 }, { 728 &dev_attr_in5_input.attr, 729 &dev_attr_in5_min.attr, 730 &dev_attr_in5_max.attr, 731 &sensor_dev_attr_in5_alarm.dev_attr.attr, 732 NULL 733 } 734 }; 735 736 static const struct attribute_group vt8231_group_volts[6] = { 737 { .attrs = vt8231_attributes_volts[0] }, 738 { .attrs = vt8231_attributes_volts[1] }, 739 { .attrs = vt8231_attributes_volts[2] }, 740 { .attrs = vt8231_attributes_volts[3] }, 741 { .attrs = vt8231_attributes_volts[4] }, 742 { .attrs = vt8231_attributes_volts[5] }, 743 }; 744 745 static struct attribute *vt8231_attributes[] = { 746 &sensor_dev_attr_fan1_input.dev_attr.attr, 747 &sensor_dev_attr_fan2_input.dev_attr.attr, 748 &sensor_dev_attr_fan1_min.dev_attr.attr, 749 &sensor_dev_attr_fan2_min.dev_attr.attr, 750 &sensor_dev_attr_fan1_div.dev_attr.attr, 751 &sensor_dev_attr_fan2_div.dev_attr.attr, 752 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 753 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 754 &dev_attr_alarms.attr, 755 &dev_attr_name.attr, 756 NULL 757 }; 758 759 static const struct attribute_group vt8231_group = { 760 .attrs = vt8231_attributes, 761 }; 762 763 static struct platform_driver vt8231_driver = { 764 .driver = { 765 .name = "vt8231", 766 }, 767 .probe = vt8231_probe, 768 .remove = vt8231_remove, 769 }; 770 771 static const struct pci_device_id vt8231_pci_ids[] = { 772 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) }, 773 { 0, } 774 }; 775 776 MODULE_DEVICE_TABLE(pci, vt8231_pci_ids); 777 778 static int vt8231_pci_probe(struct pci_dev *dev, 779 const struct pci_device_id *id); 780 781 static struct pci_driver vt8231_pci_driver = { 782 .name = "vt8231", 783 .id_table = vt8231_pci_ids, 784 .probe = vt8231_pci_probe, 785 }; 786 787 static int vt8231_probe(struct platform_device *pdev) 788 { 789 struct resource *res; 790 struct vt8231_data *data; 791 int err = 0, i; 792 793 /* Reserve the ISA region */ 794 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 795 if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT, 796 vt8231_driver.driver.name)) { 797 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n", 798 (unsigned long)res->start, (unsigned long)res->end); 799 return -ENODEV; 800 } 801 802 data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL); 803 if (!data) 804 return -ENOMEM; 805 806 platform_set_drvdata(pdev, data); 807 data->addr = res->start; 808 data->name = "vt8231"; 809 810 mutex_init(&data->update_lock); 811 vt8231_init_device(data); 812 813 /* Register sysfs hooks */ 814 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group); 815 if (err) 816 return err; 817 818 /* Must update device information to find out the config field */ 819 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG); 820 821 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) { 822 if (ISTEMP(i, data->uch_config)) { 823 err = sysfs_create_group(&pdev->dev.kobj, 824 &vt8231_group_temps[i]); 825 if (err) 826 goto exit_remove_files; 827 } 828 } 829 830 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) { 831 if (ISVOLT(i, data->uch_config)) { 832 err = sysfs_create_group(&pdev->dev.kobj, 833 &vt8231_group_volts[i]); 834 if (err) 835 goto exit_remove_files; 836 } 837 } 838 839 data->hwmon_dev = hwmon_device_register(&pdev->dev); 840 if (IS_ERR(data->hwmon_dev)) { 841 err = PTR_ERR(data->hwmon_dev); 842 goto exit_remove_files; 843 } 844 return 0; 845 846 exit_remove_files: 847 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 848 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 849 850 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 851 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 852 853 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 854 return err; 855 } 856 857 static int vt8231_remove(struct platform_device *pdev) 858 { 859 struct vt8231_data *data = platform_get_drvdata(pdev); 860 int i; 861 862 hwmon_device_unregister(data->hwmon_dev); 863 864 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 865 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 866 867 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 868 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 869 870 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 871 872 return 0; 873 } 874 875 static void vt8231_init_device(struct vt8231_data *data) 876 { 877 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0); 878 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0); 879 } 880 881 static struct vt8231_data *vt8231_update_device(struct device *dev) 882 { 883 struct vt8231_data *data = dev_get_drvdata(dev); 884 int i; 885 u16 low; 886 887 mutex_lock(&data->update_lock); 888 889 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 890 || !data->valid) { 891 for (i = 0; i < 6; i++) { 892 if (ISVOLT(i, data->uch_config)) { 893 data->in[i] = vt8231_read_value(data, 894 regvolt[i]); 895 data->in_min[i] = vt8231_read_value(data, 896 regvoltmin[i]); 897 data->in_max[i] = vt8231_read_value(data, 898 regvoltmax[i]); 899 } 900 } 901 for (i = 0; i < 2; i++) { 902 data->fan[i] = vt8231_read_value(data, 903 VT8231_REG_FAN(i)); 904 data->fan_min[i] = vt8231_read_value(data, 905 VT8231_REG_FAN_MIN(i)); 906 } 907 908 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01); 909 low = (low >> 6) | ((low & 0x30) >> 2) 910 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4); 911 for (i = 0; i < 6; i++) { 912 if (ISTEMP(i, data->uch_config)) { 913 data->temp[i] = (vt8231_read_value(data, 914 regtemp[i]) << 2) 915 | ((low >> (2 * i)) & 0x03); 916 data->temp_max[i] = vt8231_read_value(data, 917 regtempmax[i]); 918 data->temp_min[i] = vt8231_read_value(data, 919 regtempmin[i]); 920 } 921 } 922 923 i = vt8231_read_value(data, VT8231_REG_FANDIV); 924 data->fan_div[0] = (i >> 4) & 0x03; 925 data->fan_div[1] = i >> 6; 926 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) | 927 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8); 928 929 /* Set alarm flags correctly */ 930 if (!data->fan[0] && data->fan_min[0]) 931 data->alarms |= 0x40; 932 else if (data->fan[0] && !data->fan_min[0]) 933 data->alarms &= ~0x40; 934 935 if (!data->fan[1] && data->fan_min[1]) 936 data->alarms |= 0x80; 937 else if (data->fan[1] && !data->fan_min[1]) 938 data->alarms &= ~0x80; 939 940 data->last_updated = jiffies; 941 data->valid = 1; 942 } 943 944 mutex_unlock(&data->update_lock); 945 946 return data; 947 } 948 949 static int vt8231_device_add(unsigned short address) 950 { 951 struct resource res = { 952 .start = address, 953 .end = address + VT8231_EXTENT - 1, 954 .name = "vt8231", 955 .flags = IORESOURCE_IO, 956 }; 957 int err; 958 959 err = acpi_check_resource_conflict(&res); 960 if (err) 961 goto exit; 962 963 pdev = platform_device_alloc("vt8231", address); 964 if (!pdev) { 965 err = -ENOMEM; 966 pr_err("Device allocation failed\n"); 967 goto exit; 968 } 969 970 err = platform_device_add_resources(pdev, &res, 1); 971 if (err) { 972 pr_err("Device resource addition failed (%d)\n", err); 973 goto exit_device_put; 974 } 975 976 err = platform_device_add(pdev); 977 if (err) { 978 pr_err("Device addition failed (%d)\n", err); 979 goto exit_device_put; 980 } 981 982 return 0; 983 984 exit_device_put: 985 platform_device_put(pdev); 986 exit: 987 return err; 988 } 989 990 static int vt8231_pci_probe(struct pci_dev *dev, 991 const struct pci_device_id *id) 992 { 993 u16 address, val; 994 if (force_addr) { 995 address = force_addr & 0xff00; 996 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", 997 address); 998 999 if (PCIBIOS_SUCCESSFUL != 1000 pci_write_config_word(dev, VT8231_BASE_REG, address | 1)) 1001 return -ENODEV; 1002 } 1003 1004 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG, 1005 &val)) 1006 return -ENODEV; 1007 1008 address = val & ~(VT8231_EXTENT - 1); 1009 if (address == 0) { 1010 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n"); 1011 return -ENODEV; 1012 } 1013 1014 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG, 1015 &val)) 1016 return -ENODEV; 1017 1018 if (!(val & 0x0001)) { 1019 dev_warn(&dev->dev, "enabling sensors\n"); 1020 if (PCIBIOS_SUCCESSFUL != 1021 pci_write_config_word(dev, VT8231_ENABLE_REG, 1022 val | 0x0001)) 1023 return -ENODEV; 1024 } 1025 1026 if (platform_driver_register(&vt8231_driver)) 1027 goto exit; 1028 1029 /* Sets global pdev as a side effect */ 1030 if (vt8231_device_add(address)) 1031 goto exit_unregister; 1032 1033 /* 1034 * Always return failure here. This is to allow other drivers to bind 1035 * to this pci device. We don't really want to have control over the 1036 * pci device, we only wanted to read as few register values from it. 1037 */ 1038 1039 /* 1040 * We do, however, mark ourselves as using the PCI device to stop it 1041 * getting unloaded. 1042 */ 1043 s_bridge = pci_dev_get(dev); 1044 return -ENODEV; 1045 1046 exit_unregister: 1047 platform_driver_unregister(&vt8231_driver); 1048 exit: 1049 return -ENODEV; 1050 } 1051 1052 static int __init sm_vt8231_init(void) 1053 { 1054 return pci_register_driver(&vt8231_pci_driver); 1055 } 1056 1057 static void __exit sm_vt8231_exit(void) 1058 { 1059 pci_unregister_driver(&vt8231_pci_driver); 1060 if (s_bridge != NULL) { 1061 platform_device_unregister(pdev); 1062 platform_driver_unregister(&vt8231_driver); 1063 pci_dev_put(s_bridge); 1064 s_bridge = NULL; 1065 } 1066 } 1067 1068 MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>"); 1069 MODULE_DESCRIPTION("VT8231 sensors"); 1070 MODULE_LICENSE("GPL"); 1071 1072 module_init(sm_vt8231_init); 1073 module_exit(sm_vt8231_exit); 1074