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 in_show(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 in_min_show(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 in_max_show(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 in_min_store(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 in_max_store(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 static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); 334 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); 335 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); 336 static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); 337 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); 338 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); 339 static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); 340 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); 341 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); 342 static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); 343 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); 344 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); 345 static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); 346 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); 347 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); 348 349 static DEVICE_ATTR_RO(in5_input); 350 static DEVICE_ATTR_RW(in5_min); 351 static DEVICE_ATTR_RW(in5_max); 352 353 /* Temperatures */ 354 static ssize_t temp1_input_show(struct device *dev, 355 struct device_attribute *attr, char *buf) 356 { 357 struct vt8231_data *data = vt8231_update_device(dev); 358 return sprintf(buf, "%d\n", data->temp[0] * 250); 359 } 360 361 static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr, 362 char *buf) 363 { 364 struct vt8231_data *data = vt8231_update_device(dev); 365 return sprintf(buf, "%d\n", data->temp_max[0] * 1000); 366 } 367 368 static ssize_t temp1_max_hyst_show(struct device *dev, 369 struct device_attribute *attr, char *buf) 370 { 371 struct vt8231_data *data = vt8231_update_device(dev); 372 return sprintf(buf, "%d\n", data->temp_min[0] * 1000); 373 } 374 375 static ssize_t temp1_max_store(struct device *dev, 376 struct device_attribute *attr, const char *buf, 377 size_t count) 378 { 379 struct vt8231_data *data = dev_get_drvdata(dev); 380 long val; 381 int err; 382 383 err = kstrtol(buf, 10, &val); 384 if (err) 385 return err; 386 387 mutex_lock(&data->update_lock); 388 data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255); 389 vt8231_write_value(data, regtempmax[0], data->temp_max[0]); 390 mutex_unlock(&data->update_lock); 391 return count; 392 } 393 static ssize_t temp1_max_hyst_store(struct device *dev, 394 struct device_attribute *attr, 395 const char *buf, size_t count) 396 { 397 struct vt8231_data *data = dev_get_drvdata(dev); 398 long val; 399 int err; 400 401 err = kstrtol(buf, 10, &val); 402 if (err) 403 return err; 404 405 mutex_lock(&data->update_lock); 406 data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255); 407 vt8231_write_value(data, regtempmin[0], data->temp_min[0]); 408 mutex_unlock(&data->update_lock); 409 return count; 410 } 411 412 static ssize_t temp_show(struct device *dev, struct device_attribute *attr, 413 char *buf) 414 { 415 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 416 int nr = sensor_attr->index; 417 struct vt8231_data *data = vt8231_update_device(dev); 418 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 419 } 420 421 static ssize_t temp_max_show(struct device *dev, 422 struct device_attribute *attr, char *buf) 423 { 424 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 425 int nr = sensor_attr->index; 426 struct vt8231_data *data = vt8231_update_device(dev); 427 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr])); 428 } 429 430 static ssize_t temp_min_show(struct device *dev, 431 struct device_attribute *attr, char *buf) 432 { 433 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 434 int nr = sensor_attr->index; 435 struct vt8231_data *data = vt8231_update_device(dev); 436 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr])); 437 } 438 439 static ssize_t temp_max_store(struct device *dev, 440 struct device_attribute *attr, const char *buf, 441 size_t count) 442 { 443 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 444 int nr = sensor_attr->index; 445 struct vt8231_data *data = dev_get_drvdata(dev); 446 long val; 447 int err; 448 449 err = kstrtol(buf, 10, &val); 450 if (err) 451 return err; 452 453 mutex_lock(&data->update_lock); 454 data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255); 455 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]); 456 mutex_unlock(&data->update_lock); 457 return count; 458 } 459 static ssize_t temp_min_store(struct device *dev, 460 struct device_attribute *attr, const char *buf, 461 size_t count) 462 { 463 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 464 int nr = sensor_attr->index; 465 struct vt8231_data *data = dev_get_drvdata(dev); 466 long val; 467 int err; 468 469 err = kstrtol(buf, 10, &val); 470 if (err) 471 return err; 472 473 mutex_lock(&data->update_lock); 474 data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255); 475 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]); 476 mutex_unlock(&data->update_lock); 477 return count; 478 } 479 480 /* 481 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA 482 * temperature sensor numbering (0-5) 483 */ 484 485 static DEVICE_ATTR_RO(temp1_input); 486 static DEVICE_ATTR_RW(temp1_max); 487 static DEVICE_ATTR_RW(temp1_max_hyst); 488 489 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); 490 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); 491 static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_min, 1); 492 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); 493 static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2); 494 static SENSOR_DEVICE_ATTR_RW(temp3_max_hyst, temp_min, 2); 495 static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3); 496 static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3); 497 static SENSOR_DEVICE_ATTR_RW(temp4_max_hyst, temp_min, 3); 498 static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4); 499 static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4); 500 static SENSOR_DEVICE_ATTR_RW(temp5_max_hyst, temp_min, 4); 501 static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5); 502 static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5); 503 static SENSOR_DEVICE_ATTR_RW(temp6_max_hyst, temp_min, 5); 504 505 /* Fans */ 506 static ssize_t fan_show(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[nr], 513 DIV_FROM_REG(data->fan_div[nr]))); 514 } 515 516 static ssize_t fan_min_show(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", FAN_FROM_REG(data->fan_min[nr], 523 DIV_FROM_REG(data->fan_div[nr]))); 524 } 525 526 static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr, 527 char *buf) 528 { 529 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 530 int nr = sensor_attr->index; 531 struct vt8231_data *data = vt8231_update_device(dev); 532 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 533 } 534 535 static ssize_t fan_min_store(struct device *dev, 536 struct device_attribute *attr, const char *buf, 537 size_t count) 538 { 539 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 540 int nr = sensor_attr->index; 541 struct vt8231_data *data = dev_get_drvdata(dev); 542 unsigned long val; 543 int err; 544 545 err = kstrtoul(buf, 10, &val); 546 if (err) 547 return err; 548 549 mutex_lock(&data->update_lock); 550 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 551 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 552 mutex_unlock(&data->update_lock); 553 return count; 554 } 555 556 static ssize_t fan_div_store(struct device *dev, 557 struct device_attribute *attr, const char *buf, 558 size_t count) 559 { 560 struct vt8231_data *data = dev_get_drvdata(dev); 561 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 562 unsigned long val; 563 int nr = sensor_attr->index; 564 int old = vt8231_read_value(data, VT8231_REG_FANDIV); 565 long min = FAN_FROM_REG(data->fan_min[nr], 566 DIV_FROM_REG(data->fan_div[nr])); 567 int err; 568 569 err = kstrtoul(buf, 10, &val); 570 if (err) 571 return err; 572 573 mutex_lock(&data->update_lock); 574 switch (val) { 575 case 1: 576 data->fan_div[nr] = 0; 577 break; 578 case 2: 579 data->fan_div[nr] = 1; 580 break; 581 case 4: 582 data->fan_div[nr] = 2; 583 break; 584 case 8: 585 data->fan_div[nr] = 3; 586 break; 587 default: 588 dev_err(dev, 589 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", 590 val); 591 mutex_unlock(&data->update_lock); 592 return -EINVAL; 593 } 594 595 /* Correct the fan minimum speed */ 596 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 597 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 598 599 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); 600 vt8231_write_value(data, VT8231_REG_FANDIV, old); 601 mutex_unlock(&data->update_lock); 602 return count; 603 } 604 605 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); 606 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); 607 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); 608 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); 609 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); 610 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); 611 612 /* Alarms */ 613 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, 614 char *buf) 615 { 616 struct vt8231_data *data = vt8231_update_device(dev); 617 return sprintf(buf, "%d\n", data->alarms); 618 } 619 static DEVICE_ATTR_RO(alarms); 620 621 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, 622 char *buf) 623 { 624 int bitnr = to_sensor_dev_attr(attr)->index; 625 struct vt8231_data *data = vt8231_update_device(dev); 626 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 627 } 628 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); 629 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 11); 630 static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 0); 631 static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, 1); 632 static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, 3); 633 static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, 8); 634 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 11); 635 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 0); 636 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 1); 637 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); 638 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8); 639 static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 2); 640 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6); 641 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7); 642 643 static ssize_t name_show(struct device *dev, struct device_attribute 644 *devattr, char *buf) 645 { 646 struct vt8231_data *data = dev_get_drvdata(dev); 647 return sprintf(buf, "%s\n", data->name); 648 } 649 static DEVICE_ATTR_RO(name); 650 651 static struct attribute *vt8231_attributes_temps[6][5] = { 652 { 653 &dev_attr_temp1_input.attr, 654 &dev_attr_temp1_max_hyst.attr, 655 &dev_attr_temp1_max.attr, 656 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 657 NULL 658 }, { 659 &sensor_dev_attr_temp2_input.dev_attr.attr, 660 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 661 &sensor_dev_attr_temp2_max.dev_attr.attr, 662 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 663 NULL 664 }, { 665 &sensor_dev_attr_temp3_input.dev_attr.attr, 666 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, 667 &sensor_dev_attr_temp3_max.dev_attr.attr, 668 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 669 NULL 670 }, { 671 &sensor_dev_attr_temp4_input.dev_attr.attr, 672 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, 673 &sensor_dev_attr_temp4_max.dev_attr.attr, 674 &sensor_dev_attr_temp4_alarm.dev_attr.attr, 675 NULL 676 }, { 677 &sensor_dev_attr_temp5_input.dev_attr.attr, 678 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, 679 &sensor_dev_attr_temp5_max.dev_attr.attr, 680 &sensor_dev_attr_temp5_alarm.dev_attr.attr, 681 NULL 682 }, { 683 &sensor_dev_attr_temp6_input.dev_attr.attr, 684 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr, 685 &sensor_dev_attr_temp6_max.dev_attr.attr, 686 &sensor_dev_attr_temp6_alarm.dev_attr.attr, 687 NULL 688 } 689 }; 690 691 static const struct attribute_group vt8231_group_temps[6] = { 692 { .attrs = vt8231_attributes_temps[0] }, 693 { .attrs = vt8231_attributes_temps[1] }, 694 { .attrs = vt8231_attributes_temps[2] }, 695 { .attrs = vt8231_attributes_temps[3] }, 696 { .attrs = vt8231_attributes_temps[4] }, 697 { .attrs = vt8231_attributes_temps[5] }, 698 }; 699 700 static struct attribute *vt8231_attributes_volts[6][5] = { 701 { 702 &sensor_dev_attr_in0_input.dev_attr.attr, 703 &sensor_dev_attr_in0_min.dev_attr.attr, 704 &sensor_dev_attr_in0_max.dev_attr.attr, 705 &sensor_dev_attr_in0_alarm.dev_attr.attr, 706 NULL 707 }, { 708 &sensor_dev_attr_in1_input.dev_attr.attr, 709 &sensor_dev_attr_in1_min.dev_attr.attr, 710 &sensor_dev_attr_in1_max.dev_attr.attr, 711 &sensor_dev_attr_in1_alarm.dev_attr.attr, 712 NULL 713 }, { 714 &sensor_dev_attr_in2_input.dev_attr.attr, 715 &sensor_dev_attr_in2_min.dev_attr.attr, 716 &sensor_dev_attr_in2_max.dev_attr.attr, 717 &sensor_dev_attr_in2_alarm.dev_attr.attr, 718 NULL 719 }, { 720 &sensor_dev_attr_in3_input.dev_attr.attr, 721 &sensor_dev_attr_in3_min.dev_attr.attr, 722 &sensor_dev_attr_in3_max.dev_attr.attr, 723 &sensor_dev_attr_in3_alarm.dev_attr.attr, 724 NULL 725 }, { 726 &sensor_dev_attr_in4_input.dev_attr.attr, 727 &sensor_dev_attr_in4_min.dev_attr.attr, 728 &sensor_dev_attr_in4_max.dev_attr.attr, 729 &sensor_dev_attr_in4_alarm.dev_attr.attr, 730 NULL 731 }, { 732 &dev_attr_in5_input.attr, 733 &dev_attr_in5_min.attr, 734 &dev_attr_in5_max.attr, 735 &sensor_dev_attr_in5_alarm.dev_attr.attr, 736 NULL 737 } 738 }; 739 740 static const struct attribute_group vt8231_group_volts[6] = { 741 { .attrs = vt8231_attributes_volts[0] }, 742 { .attrs = vt8231_attributes_volts[1] }, 743 { .attrs = vt8231_attributes_volts[2] }, 744 { .attrs = vt8231_attributes_volts[3] }, 745 { .attrs = vt8231_attributes_volts[4] }, 746 { .attrs = vt8231_attributes_volts[5] }, 747 }; 748 749 static struct attribute *vt8231_attributes[] = { 750 &sensor_dev_attr_fan1_input.dev_attr.attr, 751 &sensor_dev_attr_fan2_input.dev_attr.attr, 752 &sensor_dev_attr_fan1_min.dev_attr.attr, 753 &sensor_dev_attr_fan2_min.dev_attr.attr, 754 &sensor_dev_attr_fan1_div.dev_attr.attr, 755 &sensor_dev_attr_fan2_div.dev_attr.attr, 756 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 757 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 758 &dev_attr_alarms.attr, 759 &dev_attr_name.attr, 760 NULL 761 }; 762 763 static const struct attribute_group vt8231_group = { 764 .attrs = vt8231_attributes, 765 }; 766 767 static struct platform_driver vt8231_driver = { 768 .driver = { 769 .name = "vt8231", 770 }, 771 .probe = vt8231_probe, 772 .remove = vt8231_remove, 773 }; 774 775 static const struct pci_device_id vt8231_pci_ids[] = { 776 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) }, 777 { 0, } 778 }; 779 780 MODULE_DEVICE_TABLE(pci, vt8231_pci_ids); 781 782 static int vt8231_pci_probe(struct pci_dev *dev, 783 const struct pci_device_id *id); 784 785 static struct pci_driver vt8231_pci_driver = { 786 .name = "vt8231", 787 .id_table = vt8231_pci_ids, 788 .probe = vt8231_pci_probe, 789 }; 790 791 static int vt8231_probe(struct platform_device *pdev) 792 { 793 struct resource *res; 794 struct vt8231_data *data; 795 int err = 0, i; 796 797 /* Reserve the ISA region */ 798 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 799 if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT, 800 vt8231_driver.driver.name)) { 801 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n", 802 (unsigned long)res->start, (unsigned long)res->end); 803 return -ENODEV; 804 } 805 806 data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL); 807 if (!data) 808 return -ENOMEM; 809 810 platform_set_drvdata(pdev, data); 811 data->addr = res->start; 812 data->name = "vt8231"; 813 814 mutex_init(&data->update_lock); 815 vt8231_init_device(data); 816 817 /* Register sysfs hooks */ 818 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group); 819 if (err) 820 return err; 821 822 /* Must update device information to find out the config field */ 823 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG); 824 825 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) { 826 if (ISTEMP(i, data->uch_config)) { 827 err = sysfs_create_group(&pdev->dev.kobj, 828 &vt8231_group_temps[i]); 829 if (err) 830 goto exit_remove_files; 831 } 832 } 833 834 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) { 835 if (ISVOLT(i, data->uch_config)) { 836 err = sysfs_create_group(&pdev->dev.kobj, 837 &vt8231_group_volts[i]); 838 if (err) 839 goto exit_remove_files; 840 } 841 } 842 843 data->hwmon_dev = hwmon_device_register(&pdev->dev); 844 if (IS_ERR(data->hwmon_dev)) { 845 err = PTR_ERR(data->hwmon_dev); 846 goto exit_remove_files; 847 } 848 return 0; 849 850 exit_remove_files: 851 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 852 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 853 854 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 855 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 856 857 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 858 return err; 859 } 860 861 static int vt8231_remove(struct platform_device *pdev) 862 { 863 struct vt8231_data *data = platform_get_drvdata(pdev); 864 int i; 865 866 hwmon_device_unregister(data->hwmon_dev); 867 868 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 869 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 870 871 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 872 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 873 874 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 875 876 return 0; 877 } 878 879 static void vt8231_init_device(struct vt8231_data *data) 880 { 881 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0); 882 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0); 883 } 884 885 static struct vt8231_data *vt8231_update_device(struct device *dev) 886 { 887 struct vt8231_data *data = dev_get_drvdata(dev); 888 int i; 889 u16 low; 890 891 mutex_lock(&data->update_lock); 892 893 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 894 || !data->valid) { 895 for (i = 0; i < 6; i++) { 896 if (ISVOLT(i, data->uch_config)) { 897 data->in[i] = vt8231_read_value(data, 898 regvolt[i]); 899 data->in_min[i] = vt8231_read_value(data, 900 regvoltmin[i]); 901 data->in_max[i] = vt8231_read_value(data, 902 regvoltmax[i]); 903 } 904 } 905 for (i = 0; i < 2; i++) { 906 data->fan[i] = vt8231_read_value(data, 907 VT8231_REG_FAN(i)); 908 data->fan_min[i] = vt8231_read_value(data, 909 VT8231_REG_FAN_MIN(i)); 910 } 911 912 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01); 913 low = (low >> 6) | ((low & 0x30) >> 2) 914 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4); 915 for (i = 0; i < 6; i++) { 916 if (ISTEMP(i, data->uch_config)) { 917 data->temp[i] = (vt8231_read_value(data, 918 regtemp[i]) << 2) 919 | ((low >> (2 * i)) & 0x03); 920 data->temp_max[i] = vt8231_read_value(data, 921 regtempmax[i]); 922 data->temp_min[i] = vt8231_read_value(data, 923 regtempmin[i]); 924 } 925 } 926 927 i = vt8231_read_value(data, VT8231_REG_FANDIV); 928 data->fan_div[0] = (i >> 4) & 0x03; 929 data->fan_div[1] = i >> 6; 930 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) | 931 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8); 932 933 /* Set alarm flags correctly */ 934 if (!data->fan[0] && data->fan_min[0]) 935 data->alarms |= 0x40; 936 else if (data->fan[0] && !data->fan_min[0]) 937 data->alarms &= ~0x40; 938 939 if (!data->fan[1] && data->fan_min[1]) 940 data->alarms |= 0x80; 941 else if (data->fan[1] && !data->fan_min[1]) 942 data->alarms &= ~0x80; 943 944 data->last_updated = jiffies; 945 data->valid = 1; 946 } 947 948 mutex_unlock(&data->update_lock); 949 950 return data; 951 } 952 953 static int vt8231_device_add(unsigned short address) 954 { 955 struct resource res = { 956 .start = address, 957 .end = address + VT8231_EXTENT - 1, 958 .name = "vt8231", 959 .flags = IORESOURCE_IO, 960 }; 961 int err; 962 963 err = acpi_check_resource_conflict(&res); 964 if (err) 965 goto exit; 966 967 pdev = platform_device_alloc("vt8231", address); 968 if (!pdev) { 969 err = -ENOMEM; 970 pr_err("Device allocation failed\n"); 971 goto exit; 972 } 973 974 err = platform_device_add_resources(pdev, &res, 1); 975 if (err) { 976 pr_err("Device resource addition failed (%d)\n", err); 977 goto exit_device_put; 978 } 979 980 err = platform_device_add(pdev); 981 if (err) { 982 pr_err("Device addition failed (%d)\n", err); 983 goto exit_device_put; 984 } 985 986 return 0; 987 988 exit_device_put: 989 platform_device_put(pdev); 990 exit: 991 return err; 992 } 993 994 static int vt8231_pci_probe(struct pci_dev *dev, 995 const struct pci_device_id *id) 996 { 997 u16 address, val; 998 if (force_addr) { 999 address = force_addr & 0xff00; 1000 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", 1001 address); 1002 1003 if (PCIBIOS_SUCCESSFUL != 1004 pci_write_config_word(dev, VT8231_BASE_REG, address | 1)) 1005 return -ENODEV; 1006 } 1007 1008 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG, 1009 &val)) 1010 return -ENODEV; 1011 1012 address = val & ~(VT8231_EXTENT - 1); 1013 if (address == 0) { 1014 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n"); 1015 return -ENODEV; 1016 } 1017 1018 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG, 1019 &val)) 1020 return -ENODEV; 1021 1022 if (!(val & 0x0001)) { 1023 dev_warn(&dev->dev, "enabling sensors\n"); 1024 if (PCIBIOS_SUCCESSFUL != 1025 pci_write_config_word(dev, VT8231_ENABLE_REG, 1026 val | 0x0001)) 1027 return -ENODEV; 1028 } 1029 1030 if (platform_driver_register(&vt8231_driver)) 1031 goto exit; 1032 1033 /* Sets global pdev as a side effect */ 1034 if (vt8231_device_add(address)) 1035 goto exit_unregister; 1036 1037 /* 1038 * Always return failure here. This is to allow other drivers to bind 1039 * to this pci device. We don't really want to have control over the 1040 * pci device, we only wanted to read as few register values from it. 1041 */ 1042 1043 /* 1044 * We do, however, mark ourselves as using the PCI device to stop it 1045 * getting unloaded. 1046 */ 1047 s_bridge = pci_dev_get(dev); 1048 return -ENODEV; 1049 1050 exit_unregister: 1051 platform_driver_unregister(&vt8231_driver); 1052 exit: 1053 return -ENODEV; 1054 } 1055 1056 static int __init sm_vt8231_init(void) 1057 { 1058 return pci_register_driver(&vt8231_pci_driver); 1059 } 1060 1061 static void __exit sm_vt8231_exit(void) 1062 { 1063 pci_unregister_driver(&vt8231_pci_driver); 1064 if (s_bridge != NULL) { 1065 platform_device_unregister(pdev); 1066 platform_driver_unregister(&vt8231_driver); 1067 pci_dev_put(s_bridge); 1068 s_bridge = NULL; 1069 } 1070 } 1071 1072 MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>"); 1073 MODULE_DESCRIPTION("VT8231 sensors"); 1074 MODULE_LICENSE("GPL"); 1075 1076 module_init(sm_vt8231_init); 1077 module_exit(sm_vt8231_exit); 1078