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 show_in5(struct device *dev, struct device_attribute *attr, 267 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 show_in5_min(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 show_in5_max(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 set_in5_min(struct device *dev, struct device_attribute *attr, 294 const char *buf, size_t count) 295 { 296 struct vt8231_data *data = dev_get_drvdata(dev); 297 unsigned long val; 298 int err; 299 300 err = kstrtoul(buf, 10, &val); 301 if (err) 302 return err; 303 304 mutex_lock(&data->update_lock); 305 data->in_min[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3, 306 0, 255); 307 vt8231_write_value(data, regvoltmin[5], data->in_min[5]); 308 mutex_unlock(&data->update_lock); 309 return count; 310 } 311 312 static ssize_t set_in5_max(struct device *dev, struct device_attribute *attr, 313 const char *buf, size_t count) 314 { 315 struct vt8231_data *data = dev_get_drvdata(dev); 316 unsigned long val; 317 int err; 318 319 err = kstrtoul(buf, 10, &val); 320 if (err) 321 return err; 322 323 mutex_lock(&data->update_lock); 324 data->in_max[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3, 325 0, 255); 326 vt8231_write_value(data, regvoltmax[5], data->in_max[5]); 327 mutex_unlock(&data->update_lock); 328 return count; 329 } 330 331 #define define_voltage_sysfs(offset) \ 332 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 333 show_in, NULL, offset); \ 334 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 335 show_in_min, set_in_min, offset); \ 336 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 337 show_in_max, set_in_max, offset) 338 339 define_voltage_sysfs(0); 340 define_voltage_sysfs(1); 341 define_voltage_sysfs(2); 342 define_voltage_sysfs(3); 343 define_voltage_sysfs(4); 344 345 static DEVICE_ATTR(in5_input, S_IRUGO, show_in5, NULL); 346 static DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR, show_in5_min, set_in5_min); 347 static DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR, show_in5_max, set_in5_max); 348 349 /* Temperatures */ 350 static ssize_t show_temp0(struct device *dev, struct device_attribute *attr, 351 char *buf) 352 { 353 struct vt8231_data *data = vt8231_update_device(dev); 354 return sprintf(buf, "%d\n", data->temp[0] * 250); 355 } 356 357 static ssize_t show_temp0_max(struct device *dev, struct device_attribute *attr, 358 char *buf) 359 { 360 struct vt8231_data *data = vt8231_update_device(dev); 361 return sprintf(buf, "%d\n", data->temp_max[0] * 1000); 362 } 363 364 static ssize_t show_temp0_min(struct device *dev, struct device_attribute *attr, 365 char *buf) 366 { 367 struct vt8231_data *data = vt8231_update_device(dev); 368 return sprintf(buf, "%d\n", data->temp_min[0] * 1000); 369 } 370 371 static ssize_t set_temp0_max(struct device *dev, struct device_attribute *attr, 372 const char *buf, size_t count) 373 { 374 struct vt8231_data *data = dev_get_drvdata(dev); 375 long val; 376 int err; 377 378 err = kstrtol(buf, 10, &val); 379 if (err) 380 return err; 381 382 mutex_lock(&data->update_lock); 383 data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255); 384 vt8231_write_value(data, regtempmax[0], data->temp_max[0]); 385 mutex_unlock(&data->update_lock); 386 return count; 387 } 388 static ssize_t set_temp0_min(struct device *dev, struct device_attribute *attr, 389 const char *buf, size_t count) 390 { 391 struct vt8231_data *data = dev_get_drvdata(dev); 392 long val; 393 int err; 394 395 err = kstrtol(buf, 10, &val); 396 if (err) 397 return err; 398 399 mutex_lock(&data->update_lock); 400 data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255); 401 vt8231_write_value(data, regtempmin[0], data->temp_min[0]); 402 mutex_unlock(&data->update_lock); 403 return count; 404 } 405 406 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 407 char *buf) 408 { 409 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 410 int nr = sensor_attr->index; 411 struct vt8231_data *data = vt8231_update_device(dev); 412 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 413 } 414 415 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 416 char *buf) 417 { 418 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 419 int nr = sensor_attr->index; 420 struct vt8231_data *data = vt8231_update_device(dev); 421 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr])); 422 } 423 424 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 425 char *buf) 426 { 427 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 428 int nr = sensor_attr->index; 429 struct vt8231_data *data = vt8231_update_device(dev); 430 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr])); 431 } 432 433 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 434 const char *buf, size_t count) 435 { 436 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 437 int nr = sensor_attr->index; 438 struct vt8231_data *data = dev_get_drvdata(dev); 439 long val; 440 int err; 441 442 err = kstrtol(buf, 10, &val); 443 if (err) 444 return err; 445 446 mutex_lock(&data->update_lock); 447 data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255); 448 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]); 449 mutex_unlock(&data->update_lock); 450 return count; 451 } 452 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 453 const char *buf, size_t count) 454 { 455 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 456 int nr = sensor_attr->index; 457 struct vt8231_data *data = dev_get_drvdata(dev); 458 long val; 459 int err; 460 461 err = kstrtol(buf, 10, &val); 462 if (err) 463 return err; 464 465 mutex_lock(&data->update_lock); 466 data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255); 467 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]); 468 mutex_unlock(&data->update_lock); 469 return count; 470 } 471 472 /* 473 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA 474 * temperature sensor numbering (0-5) 475 */ 476 #define define_temperature_sysfs(offset) \ 477 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 478 show_temp, NULL, offset - 1); \ 479 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 480 show_temp_max, set_temp_max, offset - 1); \ 481 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ 482 show_temp_min, set_temp_min, offset - 1) 483 484 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp0, NULL); 485 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp0_max, set_temp0_max); 486 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, show_temp0_min, 487 set_temp0_min); 488 489 define_temperature_sysfs(2); 490 define_temperature_sysfs(3); 491 define_temperature_sysfs(4); 492 define_temperature_sysfs(5); 493 define_temperature_sysfs(6); 494 495 /* Fans */ 496 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 497 char *buf) 498 { 499 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 500 int nr = sensor_attr->index; 501 struct vt8231_data *data = vt8231_update_device(dev); 502 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 503 DIV_FROM_REG(data->fan_div[nr]))); 504 } 505 506 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 507 char *buf) 508 { 509 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 510 int nr = sensor_attr->index; 511 struct vt8231_data *data = vt8231_update_device(dev); 512 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 513 DIV_FROM_REG(data->fan_div[nr]))); 514 } 515 516 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 517 char *buf) 518 { 519 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 520 int nr = sensor_attr->index; 521 struct vt8231_data *data = vt8231_update_device(dev); 522 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 523 } 524 525 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 526 const char *buf, size_t count) 527 { 528 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 529 int nr = sensor_attr->index; 530 struct vt8231_data *data = dev_get_drvdata(dev); 531 unsigned long val; 532 int err; 533 534 err = kstrtoul(buf, 10, &val); 535 if (err) 536 return err; 537 538 mutex_lock(&data->update_lock); 539 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 540 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 541 mutex_unlock(&data->update_lock); 542 return count; 543 } 544 545 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 546 const char *buf, size_t count) 547 { 548 struct vt8231_data *data = dev_get_drvdata(dev); 549 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 550 unsigned long val; 551 int nr = sensor_attr->index; 552 int old = vt8231_read_value(data, VT8231_REG_FANDIV); 553 long min = FAN_FROM_REG(data->fan_min[nr], 554 DIV_FROM_REG(data->fan_div[nr])); 555 int err; 556 557 err = kstrtoul(buf, 10, &val); 558 if (err) 559 return err; 560 561 mutex_lock(&data->update_lock); 562 switch (val) { 563 case 1: 564 data->fan_div[nr] = 0; 565 break; 566 case 2: 567 data->fan_div[nr] = 1; 568 break; 569 case 4: 570 data->fan_div[nr] = 2; 571 break; 572 case 8: 573 data->fan_div[nr] = 3; 574 break; 575 default: 576 dev_err(dev, 577 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", 578 val); 579 mutex_unlock(&data->update_lock); 580 return -EINVAL; 581 } 582 583 /* Correct the fan minimum speed */ 584 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 585 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 586 587 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); 588 vt8231_write_value(data, VT8231_REG_FANDIV, old); 589 mutex_unlock(&data->update_lock); 590 return count; 591 } 592 593 594 #define define_fan_sysfs(offset) \ 595 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 596 show_fan, NULL, offset - 1); \ 597 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 598 show_fan_div, set_fan_div, offset - 1); \ 599 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 600 show_fan_min, set_fan_min, offset - 1) 601 602 define_fan_sysfs(1); 603 define_fan_sysfs(2); 604 605 /* Alarms */ 606 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 607 char *buf) 608 { 609 struct vt8231_data *data = vt8231_update_device(dev); 610 return sprintf(buf, "%d\n", data->alarms); 611 } 612 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 613 614 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 615 char *buf) 616 { 617 int bitnr = to_sensor_dev_attr(attr)->index; 618 struct vt8231_data *data = vt8231_update_device(dev); 619 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 620 } 621 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 622 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11); 623 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0); 624 static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1); 625 static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 3); 626 static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 8); 627 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 11); 628 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0); 629 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 1); 630 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 631 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 632 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 2); 633 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 634 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 635 636 static ssize_t show_name(struct device *dev, struct device_attribute 637 *devattr, char *buf) 638 { 639 struct vt8231_data *data = dev_get_drvdata(dev); 640 return sprintf(buf, "%s\n", data->name); 641 } 642 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 643 644 static struct attribute *vt8231_attributes_temps[6][5] = { 645 { 646 &dev_attr_temp1_input.attr, 647 &dev_attr_temp1_max_hyst.attr, 648 &dev_attr_temp1_max.attr, 649 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 650 NULL 651 }, { 652 &sensor_dev_attr_temp2_input.dev_attr.attr, 653 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 654 &sensor_dev_attr_temp2_max.dev_attr.attr, 655 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 656 NULL 657 }, { 658 &sensor_dev_attr_temp3_input.dev_attr.attr, 659 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, 660 &sensor_dev_attr_temp3_max.dev_attr.attr, 661 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 662 NULL 663 }, { 664 &sensor_dev_attr_temp4_input.dev_attr.attr, 665 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, 666 &sensor_dev_attr_temp4_max.dev_attr.attr, 667 &sensor_dev_attr_temp4_alarm.dev_attr.attr, 668 NULL 669 }, { 670 &sensor_dev_attr_temp5_input.dev_attr.attr, 671 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, 672 &sensor_dev_attr_temp5_max.dev_attr.attr, 673 &sensor_dev_attr_temp5_alarm.dev_attr.attr, 674 NULL 675 }, { 676 &sensor_dev_attr_temp6_input.dev_attr.attr, 677 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr, 678 &sensor_dev_attr_temp6_max.dev_attr.attr, 679 &sensor_dev_attr_temp6_alarm.dev_attr.attr, 680 NULL 681 } 682 }; 683 684 static const struct attribute_group vt8231_group_temps[6] = { 685 { .attrs = vt8231_attributes_temps[0] }, 686 { .attrs = vt8231_attributes_temps[1] }, 687 { .attrs = vt8231_attributes_temps[2] }, 688 { .attrs = vt8231_attributes_temps[3] }, 689 { .attrs = vt8231_attributes_temps[4] }, 690 { .attrs = vt8231_attributes_temps[5] }, 691 }; 692 693 static struct attribute *vt8231_attributes_volts[6][5] = { 694 { 695 &sensor_dev_attr_in0_input.dev_attr.attr, 696 &sensor_dev_attr_in0_min.dev_attr.attr, 697 &sensor_dev_attr_in0_max.dev_attr.attr, 698 &sensor_dev_attr_in0_alarm.dev_attr.attr, 699 NULL 700 }, { 701 &sensor_dev_attr_in1_input.dev_attr.attr, 702 &sensor_dev_attr_in1_min.dev_attr.attr, 703 &sensor_dev_attr_in1_max.dev_attr.attr, 704 &sensor_dev_attr_in1_alarm.dev_attr.attr, 705 NULL 706 }, { 707 &sensor_dev_attr_in2_input.dev_attr.attr, 708 &sensor_dev_attr_in2_min.dev_attr.attr, 709 &sensor_dev_attr_in2_max.dev_attr.attr, 710 &sensor_dev_attr_in2_alarm.dev_attr.attr, 711 NULL 712 }, { 713 &sensor_dev_attr_in3_input.dev_attr.attr, 714 &sensor_dev_attr_in3_min.dev_attr.attr, 715 &sensor_dev_attr_in3_max.dev_attr.attr, 716 &sensor_dev_attr_in3_alarm.dev_attr.attr, 717 NULL 718 }, { 719 &sensor_dev_attr_in4_input.dev_attr.attr, 720 &sensor_dev_attr_in4_min.dev_attr.attr, 721 &sensor_dev_attr_in4_max.dev_attr.attr, 722 &sensor_dev_attr_in4_alarm.dev_attr.attr, 723 NULL 724 }, { 725 &dev_attr_in5_input.attr, 726 &dev_attr_in5_min.attr, 727 &dev_attr_in5_max.attr, 728 &sensor_dev_attr_in5_alarm.dev_attr.attr, 729 NULL 730 } 731 }; 732 733 static const struct attribute_group vt8231_group_volts[6] = { 734 { .attrs = vt8231_attributes_volts[0] }, 735 { .attrs = vt8231_attributes_volts[1] }, 736 { .attrs = vt8231_attributes_volts[2] }, 737 { .attrs = vt8231_attributes_volts[3] }, 738 { .attrs = vt8231_attributes_volts[4] }, 739 { .attrs = vt8231_attributes_volts[5] }, 740 }; 741 742 static struct attribute *vt8231_attributes[] = { 743 &sensor_dev_attr_fan1_input.dev_attr.attr, 744 &sensor_dev_attr_fan2_input.dev_attr.attr, 745 &sensor_dev_attr_fan1_min.dev_attr.attr, 746 &sensor_dev_attr_fan2_min.dev_attr.attr, 747 &sensor_dev_attr_fan1_div.dev_attr.attr, 748 &sensor_dev_attr_fan2_div.dev_attr.attr, 749 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 750 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 751 &dev_attr_alarms.attr, 752 &dev_attr_name.attr, 753 NULL 754 }; 755 756 static const struct attribute_group vt8231_group = { 757 .attrs = vt8231_attributes, 758 }; 759 760 static struct platform_driver vt8231_driver = { 761 .driver = { 762 .name = "vt8231", 763 }, 764 .probe = vt8231_probe, 765 .remove = vt8231_remove, 766 }; 767 768 static const struct pci_device_id vt8231_pci_ids[] = { 769 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) }, 770 { 0, } 771 }; 772 773 MODULE_DEVICE_TABLE(pci, vt8231_pci_ids); 774 775 static int vt8231_pci_probe(struct pci_dev *dev, 776 const struct pci_device_id *id); 777 778 static struct pci_driver vt8231_pci_driver = { 779 .name = "vt8231", 780 .id_table = vt8231_pci_ids, 781 .probe = vt8231_pci_probe, 782 }; 783 784 static int vt8231_probe(struct platform_device *pdev) 785 { 786 struct resource *res; 787 struct vt8231_data *data; 788 int err = 0, i; 789 790 /* Reserve the ISA region */ 791 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 792 if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT, 793 vt8231_driver.driver.name)) { 794 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n", 795 (unsigned long)res->start, (unsigned long)res->end); 796 return -ENODEV; 797 } 798 799 data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL); 800 if (!data) 801 return -ENOMEM; 802 803 platform_set_drvdata(pdev, data); 804 data->addr = res->start; 805 data->name = "vt8231"; 806 807 mutex_init(&data->update_lock); 808 vt8231_init_device(data); 809 810 /* Register sysfs hooks */ 811 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group); 812 if (err) 813 return err; 814 815 /* Must update device information to find out the config field */ 816 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG); 817 818 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) { 819 if (ISTEMP(i, data->uch_config)) { 820 err = sysfs_create_group(&pdev->dev.kobj, 821 &vt8231_group_temps[i]); 822 if (err) 823 goto exit_remove_files; 824 } 825 } 826 827 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) { 828 if (ISVOLT(i, data->uch_config)) { 829 err = sysfs_create_group(&pdev->dev.kobj, 830 &vt8231_group_volts[i]); 831 if (err) 832 goto exit_remove_files; 833 } 834 } 835 836 data->hwmon_dev = hwmon_device_register(&pdev->dev); 837 if (IS_ERR(data->hwmon_dev)) { 838 err = PTR_ERR(data->hwmon_dev); 839 goto exit_remove_files; 840 } 841 return 0; 842 843 exit_remove_files: 844 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 845 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 846 847 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 848 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 849 850 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 851 return err; 852 } 853 854 static int vt8231_remove(struct platform_device *pdev) 855 { 856 struct vt8231_data *data = platform_get_drvdata(pdev); 857 int i; 858 859 hwmon_device_unregister(data->hwmon_dev); 860 861 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 862 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 863 864 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 865 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 866 867 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 868 869 return 0; 870 } 871 872 static void vt8231_init_device(struct vt8231_data *data) 873 { 874 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0); 875 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0); 876 } 877 878 static struct vt8231_data *vt8231_update_device(struct device *dev) 879 { 880 struct vt8231_data *data = dev_get_drvdata(dev); 881 int i; 882 u16 low; 883 884 mutex_lock(&data->update_lock); 885 886 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 887 || !data->valid) { 888 for (i = 0; i < 6; i++) { 889 if (ISVOLT(i, data->uch_config)) { 890 data->in[i] = vt8231_read_value(data, 891 regvolt[i]); 892 data->in_min[i] = vt8231_read_value(data, 893 regvoltmin[i]); 894 data->in_max[i] = vt8231_read_value(data, 895 regvoltmax[i]); 896 } 897 } 898 for (i = 0; i < 2; i++) { 899 data->fan[i] = vt8231_read_value(data, 900 VT8231_REG_FAN(i)); 901 data->fan_min[i] = vt8231_read_value(data, 902 VT8231_REG_FAN_MIN(i)); 903 } 904 905 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01); 906 low = (low >> 6) | ((low & 0x30) >> 2) 907 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4); 908 for (i = 0; i < 6; i++) { 909 if (ISTEMP(i, data->uch_config)) { 910 data->temp[i] = (vt8231_read_value(data, 911 regtemp[i]) << 2) 912 | ((low >> (2 * i)) & 0x03); 913 data->temp_max[i] = vt8231_read_value(data, 914 regtempmax[i]); 915 data->temp_min[i] = vt8231_read_value(data, 916 regtempmin[i]); 917 } 918 } 919 920 i = vt8231_read_value(data, VT8231_REG_FANDIV); 921 data->fan_div[0] = (i >> 4) & 0x03; 922 data->fan_div[1] = i >> 6; 923 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) | 924 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8); 925 926 /* Set alarm flags correctly */ 927 if (!data->fan[0] && data->fan_min[0]) 928 data->alarms |= 0x40; 929 else if (data->fan[0] && !data->fan_min[0]) 930 data->alarms &= ~0x40; 931 932 if (!data->fan[1] && data->fan_min[1]) 933 data->alarms |= 0x80; 934 else if (data->fan[1] && !data->fan_min[1]) 935 data->alarms &= ~0x80; 936 937 data->last_updated = jiffies; 938 data->valid = 1; 939 } 940 941 mutex_unlock(&data->update_lock); 942 943 return data; 944 } 945 946 static int vt8231_device_add(unsigned short address) 947 { 948 struct resource res = { 949 .start = address, 950 .end = address + VT8231_EXTENT - 1, 951 .name = "vt8231", 952 .flags = IORESOURCE_IO, 953 }; 954 int err; 955 956 err = acpi_check_resource_conflict(&res); 957 if (err) 958 goto exit; 959 960 pdev = platform_device_alloc("vt8231", address); 961 if (!pdev) { 962 err = -ENOMEM; 963 pr_err("Device allocation failed\n"); 964 goto exit; 965 } 966 967 err = platform_device_add_resources(pdev, &res, 1); 968 if (err) { 969 pr_err("Device resource addition failed (%d)\n", err); 970 goto exit_device_put; 971 } 972 973 err = platform_device_add(pdev); 974 if (err) { 975 pr_err("Device addition failed (%d)\n", err); 976 goto exit_device_put; 977 } 978 979 return 0; 980 981 exit_device_put: 982 platform_device_put(pdev); 983 exit: 984 return err; 985 } 986 987 static int vt8231_pci_probe(struct pci_dev *dev, 988 const struct pci_device_id *id) 989 { 990 u16 address, val; 991 if (force_addr) { 992 address = force_addr & 0xff00; 993 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", 994 address); 995 996 if (PCIBIOS_SUCCESSFUL != 997 pci_write_config_word(dev, VT8231_BASE_REG, address | 1)) 998 return -ENODEV; 999 } 1000 1001 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG, 1002 &val)) 1003 return -ENODEV; 1004 1005 address = val & ~(VT8231_EXTENT - 1); 1006 if (address == 0) { 1007 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n"); 1008 return -ENODEV; 1009 } 1010 1011 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG, 1012 &val)) 1013 return -ENODEV; 1014 1015 if (!(val & 0x0001)) { 1016 dev_warn(&dev->dev, "enabling sensors\n"); 1017 if (PCIBIOS_SUCCESSFUL != 1018 pci_write_config_word(dev, VT8231_ENABLE_REG, 1019 val | 0x0001)) 1020 return -ENODEV; 1021 } 1022 1023 if (platform_driver_register(&vt8231_driver)) 1024 goto exit; 1025 1026 /* Sets global pdev as a side effect */ 1027 if (vt8231_device_add(address)) 1028 goto exit_unregister; 1029 1030 /* 1031 * Always return failure here. This is to allow other drivers to bind 1032 * to this pci device. We don't really want to have control over the 1033 * pci device, we only wanted to read as few register values from it. 1034 */ 1035 1036 /* 1037 * We do, however, mark ourselves as using the PCI device to stop it 1038 * getting unloaded. 1039 */ 1040 s_bridge = pci_dev_get(dev); 1041 return -ENODEV; 1042 1043 exit_unregister: 1044 platform_driver_unregister(&vt8231_driver); 1045 exit: 1046 return -ENODEV; 1047 } 1048 1049 static int __init sm_vt8231_init(void) 1050 { 1051 return pci_register_driver(&vt8231_pci_driver); 1052 } 1053 1054 static void __exit sm_vt8231_exit(void) 1055 { 1056 pci_unregister_driver(&vt8231_pci_driver); 1057 if (s_bridge != NULL) { 1058 platform_device_unregister(pdev); 1059 platform_driver_unregister(&vt8231_driver); 1060 pci_dev_put(s_bridge); 1061 s_bridge = NULL; 1062 } 1063 } 1064 1065 MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>"); 1066 MODULE_DESCRIPTION("VT8231 sensors"); 1067 MODULE_LICENSE("GPL"); 1068 1069 module_init(sm_vt8231_init); 1070 module_exit(sm_vt8231_exit); 1071