1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * vt8231.c - Part of lm_sensors, Linux kernel modules 4 * for hardware monitoring 5 * 6 * Copyright (c) 2005 Roger Lucas <vt8231@hiddenengine.co.uk> 7 * Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com> 8 * Aaron M. Marsh <amarsh@sdf.lonestar.org> 9 */ 10 11 /* 12 * Supports VIA VT8231 South Bridge embedded sensors 13 */ 14 15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 16 17 #include <linux/module.h> 18 #include <linux/init.h> 19 #include <linux/slab.h> 20 #include <linux/pci.h> 21 #include <linux/jiffies.h> 22 #include <linux/platform_device.h> 23 #include <linux/hwmon.h> 24 #include <linux/hwmon-sysfs.h> 25 #include <linux/hwmon-vid.h> 26 #include <linux/err.h> 27 #include <linux/mutex.h> 28 #include <linux/acpi.h> 29 #include <linux/io.h> 30 31 static int force_addr; 32 module_param(force_addr, int, 0); 33 MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors"); 34 35 static struct platform_device *pdev; 36 37 #define VT8231_EXTENT 0x80 38 #define VT8231_BASE_REG 0x70 39 #define VT8231_ENABLE_REG 0x74 40 41 /* 42 * The VT8231 registers 43 * 44 * The reset value for the input channel configuration is used (Reg 0x4A=0x07) 45 * which sets the selected inputs marked with '*' below if multiple options are 46 * possible: 47 * 48 * Voltage Mode Temperature Mode 49 * Sensor Linux Id Linux Id VIA Id 50 * -------- -------- -------- ------ 51 * CPU Diode N/A temp1 0 52 * UIC1 in0 temp2 * 1 53 * UIC2 in1 * temp3 2 54 * UIC3 in2 * temp4 3 55 * UIC4 in3 * temp5 4 56 * UIC5 in4 * temp6 5 57 * 3.3V in5 N/A 58 * 59 * Note that the BIOS may set the configuration register to a different value 60 * to match the motherboard configuration. 61 */ 62 63 /* fans numbered 0-1 */ 64 #define VT8231_REG_FAN_MIN(nr) (0x3b + (nr)) 65 #define VT8231_REG_FAN(nr) (0x29 + (nr)) 66 67 /* Voltage inputs numbered 0-5 */ 68 69 static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 }; 70 static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 }; 71 static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 }; 72 73 /* 74 * Temperatures are numbered 1-6 according to the Linux kernel specification. 75 * 76 * In the VIA datasheet, however, the temperatures are numbered from zero. 77 * Since it is important that this driver can easily be compared to the VIA 78 * datasheet, we will use the VIA numbering within this driver and map the 79 * kernel sysfs device name to the VIA number in the sysfs callback. 80 */ 81 82 #define VT8231_REG_TEMP_LOW01 0x49 83 #define VT8231_REG_TEMP_LOW25 0x4d 84 85 static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 }; 86 static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 }; 87 static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 }; 88 89 #define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210) 90 #define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210) 91 #define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200) 92 93 #define VT8231_REG_CONFIG 0x40 94 #define VT8231_REG_ALARM1 0x41 95 #define VT8231_REG_ALARM2 0x42 96 #define VT8231_REG_FANDIV 0x47 97 #define VT8231_REG_UCH_CONFIG 0x4a 98 #define VT8231_REG_TEMP1_CONFIG 0x4b 99 #define VT8231_REG_TEMP2_CONFIG 0x4c 100 101 /* 102 * temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux 103 * numbering 104 */ 105 #define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \ 106 ((ch_config) >> ((i)+1)) & 0x01) 107 /* voltages 0-5 */ 108 #define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \ 109 !(((ch_config) >> ((i)+2)) & 0x01)) 110 111 #define DIV_FROM_REG(val) (1 << (val)) 112 113 /* 114 * NB The values returned here are NOT temperatures. The calibration curves 115 * for the thermistor curves are board-specific and must go in the 116 * sensors.conf file. Temperature sensors are actually ten bits, but the 117 * VIA datasheet only considers the 8 MSBs obtained from the regtemp[] 118 * register. The temperature value returned should have a magnitude of 3, 119 * so we use the VIA scaling as the "true" scaling and use the remaining 2 120 * LSBs as fractional precision. 121 * 122 * All the on-chip hardware temperature comparisons for the alarms are only 123 * 8-bits wide, and compare against the 8 MSBs of the temperature. The bits 124 * in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are 125 * ignored. 126 */ 127 128 /* 129 ****** FAN RPM CONVERSIONS ******** 130 * This chip saturates back at 0, not at 255 like many the other chips. 131 * So, 0 means 0 RPM 132 */ 133 static inline u8 FAN_TO_REG(long rpm, int div) 134 { 135 if (rpm <= 0 || rpm > 1310720) 136 return 0; 137 return clamp_val(1310720 / (rpm * div), 1, 255); 138 } 139 140 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div))) 141 142 struct vt8231_data { 143 unsigned short addr; 144 const char *name; 145 146 struct mutex update_lock; 147 struct device *hwmon_dev; 148 bool valid; /* true if following fields are valid */ 149 unsigned long last_updated; /* In jiffies */ 150 151 u8 in[6]; /* Register value */ 152 u8 in_max[6]; /* Register value */ 153 u8 in_min[6]; /* Register value */ 154 u16 temp[6]; /* Register value 10 bit, right aligned */ 155 u8 temp_max[6]; /* Register value */ 156 u8 temp_min[6]; /* Register value */ 157 u8 fan[2]; /* Register value */ 158 u8 fan_min[2]; /* Register value */ 159 u8 fan_div[2]; /* Register encoding, shifted right */ 160 u16 alarms; /* Register encoding */ 161 u8 uch_config; 162 }; 163 164 static struct pci_dev *s_bridge; 165 static int vt8231_probe(struct platform_device *pdev); 166 static int vt8231_remove(struct platform_device *pdev); 167 static struct vt8231_data *vt8231_update_device(struct device *dev); 168 static void vt8231_init_device(struct vt8231_data *data); 169 170 static inline int vt8231_read_value(struct vt8231_data *data, u8 reg) 171 { 172 return inb_p(data->addr + reg); 173 } 174 175 static inline void vt8231_write_value(struct vt8231_data *data, u8 reg, 176 u8 value) 177 { 178 outb_p(value, data->addr + reg); 179 } 180 181 /* following are the sysfs callback functions */ 182 static ssize_t in_show(struct device *dev, struct device_attribute *attr, 183 char *buf) 184 { 185 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 186 int nr = sensor_attr->index; 187 struct vt8231_data *data = vt8231_update_device(dev); 188 189 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958); 190 } 191 192 static ssize_t in_min_show(struct device *dev, struct device_attribute *attr, 193 char *buf) 194 { 195 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 196 int nr = sensor_attr->index; 197 struct vt8231_data *data = vt8231_update_device(dev); 198 199 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958); 200 } 201 202 static ssize_t in_max_show(struct device *dev, struct device_attribute *attr, 203 char *buf) 204 { 205 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 206 int nr = sensor_attr->index; 207 struct vt8231_data *data = vt8231_update_device(dev); 208 209 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958)); 210 } 211 212 static ssize_t in_min_store(struct device *dev, struct device_attribute *attr, 213 const char *buf, size_t count) 214 { 215 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 216 int nr = sensor_attr->index; 217 struct vt8231_data *data = dev_get_drvdata(dev); 218 unsigned long val; 219 int err; 220 221 err = kstrtoul(buf, 10, &val); 222 if (err) 223 return err; 224 225 mutex_lock(&data->update_lock); 226 data->in_min[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255); 227 vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]); 228 mutex_unlock(&data->update_lock); 229 return count; 230 } 231 232 static ssize_t in_max_store(struct device *dev, struct device_attribute *attr, 233 const char *buf, size_t count) 234 { 235 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 236 int nr = sensor_attr->index; 237 struct vt8231_data *data = dev_get_drvdata(dev); 238 unsigned long val; 239 int err; 240 241 err = kstrtoul(buf, 10, &val); 242 if (err) 243 return err; 244 245 mutex_lock(&data->update_lock); 246 data->in_max[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255); 247 vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]); 248 mutex_unlock(&data->update_lock); 249 return count; 250 } 251 252 /* Special case for input 5 as this has 3.3V scaling built into the chip */ 253 static ssize_t in5_input_show(struct device *dev, 254 struct device_attribute *attr, char *buf) 255 { 256 struct vt8231_data *data = vt8231_update_device(dev); 257 258 return sprintf(buf, "%d\n", 259 (((data->in[5] - 3) * 10000 * 54) / (958 * 34))); 260 } 261 262 static ssize_t in5_min_show(struct device *dev, struct device_attribute *attr, 263 char *buf) 264 { 265 struct vt8231_data *data = vt8231_update_device(dev); 266 267 return sprintf(buf, "%d\n", 268 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34))); 269 } 270 271 static ssize_t in5_max_show(struct device *dev, struct device_attribute *attr, 272 char *buf) 273 { 274 struct vt8231_data *data = vt8231_update_device(dev); 275 276 return sprintf(buf, "%d\n", 277 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34))); 278 } 279 280 static ssize_t in5_min_store(struct device *dev, 281 struct device_attribute *attr, const char *buf, 282 size_t count) 283 { 284 struct vt8231_data *data = dev_get_drvdata(dev); 285 unsigned long val; 286 int err; 287 288 err = kstrtoul(buf, 10, &val); 289 if (err) 290 return err; 291 292 mutex_lock(&data->update_lock); 293 data->in_min[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3, 294 0, 255); 295 vt8231_write_value(data, regvoltmin[5], data->in_min[5]); 296 mutex_unlock(&data->update_lock); 297 return count; 298 } 299 300 static ssize_t in5_max_store(struct device *dev, 301 struct device_attribute *attr, const char *buf, 302 size_t count) 303 { 304 struct vt8231_data *data = dev_get_drvdata(dev); 305 unsigned long val; 306 int err; 307 308 err = kstrtoul(buf, 10, &val); 309 if (err) 310 return err; 311 312 mutex_lock(&data->update_lock); 313 data->in_max[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3, 314 0, 255); 315 vt8231_write_value(data, regvoltmax[5], data->in_max[5]); 316 mutex_unlock(&data->update_lock); 317 return count; 318 } 319 320 static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); 321 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); 322 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); 323 static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); 324 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); 325 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); 326 static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); 327 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); 328 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); 329 static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); 330 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); 331 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); 332 static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); 333 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); 334 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); 335 336 static DEVICE_ATTR_RO(in5_input); 337 static DEVICE_ATTR_RW(in5_min); 338 static DEVICE_ATTR_RW(in5_max); 339 340 /* Temperatures */ 341 static ssize_t temp1_input_show(struct device *dev, 342 struct device_attribute *attr, char *buf) 343 { 344 struct vt8231_data *data = vt8231_update_device(dev); 345 return sprintf(buf, "%d\n", data->temp[0] * 250); 346 } 347 348 static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr, 349 char *buf) 350 { 351 struct vt8231_data *data = vt8231_update_device(dev); 352 return sprintf(buf, "%d\n", data->temp_max[0] * 1000); 353 } 354 355 static ssize_t temp1_max_hyst_show(struct device *dev, 356 struct device_attribute *attr, char *buf) 357 { 358 struct vt8231_data *data = vt8231_update_device(dev); 359 return sprintf(buf, "%d\n", data->temp_min[0] * 1000); 360 } 361 362 static ssize_t temp1_max_store(struct device *dev, 363 struct device_attribute *attr, const char *buf, 364 size_t count) 365 { 366 struct vt8231_data *data = dev_get_drvdata(dev); 367 long val; 368 int err; 369 370 err = kstrtol(buf, 10, &val); 371 if (err) 372 return err; 373 374 mutex_lock(&data->update_lock); 375 data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255); 376 vt8231_write_value(data, regtempmax[0], data->temp_max[0]); 377 mutex_unlock(&data->update_lock); 378 return count; 379 } 380 static ssize_t temp1_max_hyst_store(struct device *dev, 381 struct device_attribute *attr, 382 const char *buf, size_t count) 383 { 384 struct vt8231_data *data = dev_get_drvdata(dev); 385 long val; 386 int err; 387 388 err = kstrtol(buf, 10, &val); 389 if (err) 390 return err; 391 392 mutex_lock(&data->update_lock); 393 data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255); 394 vt8231_write_value(data, regtempmin[0], data->temp_min[0]); 395 mutex_unlock(&data->update_lock); 396 return count; 397 } 398 399 static ssize_t temp_show(struct device *dev, struct device_attribute *attr, 400 char *buf) 401 { 402 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 403 int nr = sensor_attr->index; 404 struct vt8231_data *data = vt8231_update_device(dev); 405 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 406 } 407 408 static ssize_t temp_max_show(struct device *dev, 409 struct device_attribute *attr, char *buf) 410 { 411 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 412 int nr = sensor_attr->index; 413 struct vt8231_data *data = vt8231_update_device(dev); 414 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr])); 415 } 416 417 static ssize_t temp_min_show(struct device *dev, 418 struct device_attribute *attr, char *buf) 419 { 420 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 421 int nr = sensor_attr->index; 422 struct vt8231_data *data = vt8231_update_device(dev); 423 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr])); 424 } 425 426 static ssize_t temp_max_store(struct device *dev, 427 struct device_attribute *attr, const char *buf, 428 size_t count) 429 { 430 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 431 int nr = sensor_attr->index; 432 struct vt8231_data *data = dev_get_drvdata(dev); 433 long val; 434 int err; 435 436 err = kstrtol(buf, 10, &val); 437 if (err) 438 return err; 439 440 mutex_lock(&data->update_lock); 441 data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255); 442 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]); 443 mutex_unlock(&data->update_lock); 444 return count; 445 } 446 static ssize_t temp_min_store(struct device *dev, 447 struct device_attribute *attr, const char *buf, 448 size_t count) 449 { 450 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 451 int nr = sensor_attr->index; 452 struct vt8231_data *data = dev_get_drvdata(dev); 453 long val; 454 int err; 455 456 err = kstrtol(buf, 10, &val); 457 if (err) 458 return err; 459 460 mutex_lock(&data->update_lock); 461 data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255); 462 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]); 463 mutex_unlock(&data->update_lock); 464 return count; 465 } 466 467 /* 468 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA 469 * temperature sensor numbering (0-5) 470 */ 471 472 static DEVICE_ATTR_RO(temp1_input); 473 static DEVICE_ATTR_RW(temp1_max); 474 static DEVICE_ATTR_RW(temp1_max_hyst); 475 476 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); 477 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); 478 static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_min, 1); 479 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); 480 static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2); 481 static SENSOR_DEVICE_ATTR_RW(temp3_max_hyst, temp_min, 2); 482 static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3); 483 static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3); 484 static SENSOR_DEVICE_ATTR_RW(temp4_max_hyst, temp_min, 3); 485 static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4); 486 static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4); 487 static SENSOR_DEVICE_ATTR_RW(temp5_max_hyst, temp_min, 4); 488 static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5); 489 static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5); 490 static SENSOR_DEVICE_ATTR_RW(temp6_max_hyst, temp_min, 5); 491 492 /* Fans */ 493 static ssize_t fan_show(struct device *dev, struct device_attribute *attr, 494 char *buf) 495 { 496 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 497 int nr = sensor_attr->index; 498 struct vt8231_data *data = vt8231_update_device(dev); 499 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 500 DIV_FROM_REG(data->fan_div[nr]))); 501 } 502 503 static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr, 504 char *buf) 505 { 506 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 507 int nr = sensor_attr->index; 508 struct vt8231_data *data = vt8231_update_device(dev); 509 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 510 DIV_FROM_REG(data->fan_div[nr]))); 511 } 512 513 static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr, 514 char *buf) 515 { 516 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 517 int nr = sensor_attr->index; 518 struct vt8231_data *data = vt8231_update_device(dev); 519 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 520 } 521 522 static ssize_t fan_min_store(struct device *dev, 523 struct device_attribute *attr, const char *buf, 524 size_t count) 525 { 526 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 527 int nr = sensor_attr->index; 528 struct vt8231_data *data = dev_get_drvdata(dev); 529 unsigned long val; 530 int err; 531 532 err = kstrtoul(buf, 10, &val); 533 if (err) 534 return err; 535 536 mutex_lock(&data->update_lock); 537 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 538 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 539 mutex_unlock(&data->update_lock); 540 return count; 541 } 542 543 static ssize_t fan_div_store(struct device *dev, 544 struct device_attribute *attr, const char *buf, 545 size_t count) 546 { 547 struct vt8231_data *data = dev_get_drvdata(dev); 548 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 549 unsigned long val; 550 int nr = sensor_attr->index; 551 int old = vt8231_read_value(data, VT8231_REG_FANDIV); 552 long min = FAN_FROM_REG(data->fan_min[nr], 553 DIV_FROM_REG(data->fan_div[nr])); 554 int err; 555 556 err = kstrtoul(buf, 10, &val); 557 if (err) 558 return err; 559 560 mutex_lock(&data->update_lock); 561 switch (val) { 562 case 1: 563 data->fan_div[nr] = 0; 564 break; 565 case 2: 566 data->fan_div[nr] = 1; 567 break; 568 case 4: 569 data->fan_div[nr] = 2; 570 break; 571 case 8: 572 data->fan_div[nr] = 3; 573 break; 574 default: 575 dev_err(dev, 576 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", 577 val); 578 mutex_unlock(&data->update_lock); 579 return -EINVAL; 580 } 581 582 /* Correct the fan minimum speed */ 583 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 584 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 585 586 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); 587 vt8231_write_value(data, VT8231_REG_FANDIV, old); 588 mutex_unlock(&data->update_lock); 589 return count; 590 } 591 592 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); 593 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); 594 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); 595 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); 596 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); 597 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); 598 599 /* Alarms */ 600 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, 601 char *buf) 602 { 603 struct vt8231_data *data = vt8231_update_device(dev); 604 return sprintf(buf, "%d\n", data->alarms); 605 } 606 static DEVICE_ATTR_RO(alarms); 607 608 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, 609 char *buf) 610 { 611 int bitnr = to_sensor_dev_attr(attr)->index; 612 struct vt8231_data *data = vt8231_update_device(dev); 613 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 614 } 615 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); 616 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 11); 617 static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 0); 618 static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, 1); 619 static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, 3); 620 static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, 8); 621 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 11); 622 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 0); 623 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 1); 624 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); 625 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8); 626 static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 2); 627 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6); 628 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7); 629 630 static ssize_t name_show(struct device *dev, struct device_attribute 631 *devattr, char *buf) 632 { 633 struct vt8231_data *data = dev_get_drvdata(dev); 634 return sprintf(buf, "%s\n", data->name); 635 } 636 static DEVICE_ATTR_RO(name); 637 638 static struct attribute *vt8231_attributes_temps[6][5] = { 639 { 640 &dev_attr_temp1_input.attr, 641 &dev_attr_temp1_max_hyst.attr, 642 &dev_attr_temp1_max.attr, 643 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 644 NULL 645 }, { 646 &sensor_dev_attr_temp2_input.dev_attr.attr, 647 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 648 &sensor_dev_attr_temp2_max.dev_attr.attr, 649 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 650 NULL 651 }, { 652 &sensor_dev_attr_temp3_input.dev_attr.attr, 653 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, 654 &sensor_dev_attr_temp3_max.dev_attr.attr, 655 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 656 NULL 657 }, { 658 &sensor_dev_attr_temp4_input.dev_attr.attr, 659 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, 660 &sensor_dev_attr_temp4_max.dev_attr.attr, 661 &sensor_dev_attr_temp4_alarm.dev_attr.attr, 662 NULL 663 }, { 664 &sensor_dev_attr_temp5_input.dev_attr.attr, 665 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, 666 &sensor_dev_attr_temp5_max.dev_attr.attr, 667 &sensor_dev_attr_temp5_alarm.dev_attr.attr, 668 NULL 669 }, { 670 &sensor_dev_attr_temp6_input.dev_attr.attr, 671 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr, 672 &sensor_dev_attr_temp6_max.dev_attr.attr, 673 &sensor_dev_attr_temp6_alarm.dev_attr.attr, 674 NULL 675 } 676 }; 677 678 static const struct attribute_group vt8231_group_temps[6] = { 679 { .attrs = vt8231_attributes_temps[0] }, 680 { .attrs = vt8231_attributes_temps[1] }, 681 { .attrs = vt8231_attributes_temps[2] }, 682 { .attrs = vt8231_attributes_temps[3] }, 683 { .attrs = vt8231_attributes_temps[4] }, 684 { .attrs = vt8231_attributes_temps[5] }, 685 }; 686 687 static struct attribute *vt8231_attributes_volts[6][5] = { 688 { 689 &sensor_dev_attr_in0_input.dev_attr.attr, 690 &sensor_dev_attr_in0_min.dev_attr.attr, 691 &sensor_dev_attr_in0_max.dev_attr.attr, 692 &sensor_dev_attr_in0_alarm.dev_attr.attr, 693 NULL 694 }, { 695 &sensor_dev_attr_in1_input.dev_attr.attr, 696 &sensor_dev_attr_in1_min.dev_attr.attr, 697 &sensor_dev_attr_in1_max.dev_attr.attr, 698 &sensor_dev_attr_in1_alarm.dev_attr.attr, 699 NULL 700 }, { 701 &sensor_dev_attr_in2_input.dev_attr.attr, 702 &sensor_dev_attr_in2_min.dev_attr.attr, 703 &sensor_dev_attr_in2_max.dev_attr.attr, 704 &sensor_dev_attr_in2_alarm.dev_attr.attr, 705 NULL 706 }, { 707 &sensor_dev_attr_in3_input.dev_attr.attr, 708 &sensor_dev_attr_in3_min.dev_attr.attr, 709 &sensor_dev_attr_in3_max.dev_attr.attr, 710 &sensor_dev_attr_in3_alarm.dev_attr.attr, 711 NULL 712 }, { 713 &sensor_dev_attr_in4_input.dev_attr.attr, 714 &sensor_dev_attr_in4_min.dev_attr.attr, 715 &sensor_dev_attr_in4_max.dev_attr.attr, 716 &sensor_dev_attr_in4_alarm.dev_attr.attr, 717 NULL 718 }, { 719 &dev_attr_in5_input.attr, 720 &dev_attr_in5_min.attr, 721 &dev_attr_in5_max.attr, 722 &sensor_dev_attr_in5_alarm.dev_attr.attr, 723 NULL 724 } 725 }; 726 727 static const struct attribute_group vt8231_group_volts[6] = { 728 { .attrs = vt8231_attributes_volts[0] }, 729 { .attrs = vt8231_attributes_volts[1] }, 730 { .attrs = vt8231_attributes_volts[2] }, 731 { .attrs = vt8231_attributes_volts[3] }, 732 { .attrs = vt8231_attributes_volts[4] }, 733 { .attrs = vt8231_attributes_volts[5] }, 734 }; 735 736 static struct attribute *vt8231_attributes[] = { 737 &sensor_dev_attr_fan1_input.dev_attr.attr, 738 &sensor_dev_attr_fan2_input.dev_attr.attr, 739 &sensor_dev_attr_fan1_min.dev_attr.attr, 740 &sensor_dev_attr_fan2_min.dev_attr.attr, 741 &sensor_dev_attr_fan1_div.dev_attr.attr, 742 &sensor_dev_attr_fan2_div.dev_attr.attr, 743 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 744 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 745 &dev_attr_alarms.attr, 746 &dev_attr_name.attr, 747 NULL 748 }; 749 750 static const struct attribute_group vt8231_group = { 751 .attrs = vt8231_attributes, 752 }; 753 754 static struct platform_driver vt8231_driver = { 755 .driver = { 756 .name = "vt8231", 757 }, 758 .probe = vt8231_probe, 759 .remove = vt8231_remove, 760 }; 761 762 static const struct pci_device_id vt8231_pci_ids[] = { 763 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) }, 764 { 0, } 765 }; 766 767 MODULE_DEVICE_TABLE(pci, vt8231_pci_ids); 768 769 static int vt8231_pci_probe(struct pci_dev *dev, 770 const struct pci_device_id *id); 771 772 static struct pci_driver vt8231_pci_driver = { 773 .name = "vt8231", 774 .id_table = vt8231_pci_ids, 775 .probe = vt8231_pci_probe, 776 }; 777 778 static int vt8231_probe(struct platform_device *pdev) 779 { 780 struct resource *res; 781 struct vt8231_data *data; 782 int err = 0, i; 783 784 /* Reserve the ISA region */ 785 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 786 if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT, 787 vt8231_driver.driver.name)) { 788 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n", 789 (unsigned long)res->start, (unsigned long)res->end); 790 return -ENODEV; 791 } 792 793 data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL); 794 if (!data) 795 return -ENOMEM; 796 797 platform_set_drvdata(pdev, data); 798 data->addr = res->start; 799 data->name = "vt8231"; 800 801 mutex_init(&data->update_lock); 802 vt8231_init_device(data); 803 804 /* Register sysfs hooks */ 805 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group); 806 if (err) 807 return err; 808 809 /* Must update device information to find out the config field */ 810 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG); 811 812 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) { 813 if (ISTEMP(i, data->uch_config)) { 814 err = sysfs_create_group(&pdev->dev.kobj, 815 &vt8231_group_temps[i]); 816 if (err) 817 goto exit_remove_files; 818 } 819 } 820 821 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) { 822 if (ISVOLT(i, data->uch_config)) { 823 err = sysfs_create_group(&pdev->dev.kobj, 824 &vt8231_group_volts[i]); 825 if (err) 826 goto exit_remove_files; 827 } 828 } 829 830 data->hwmon_dev = hwmon_device_register(&pdev->dev); 831 if (IS_ERR(data->hwmon_dev)) { 832 err = PTR_ERR(data->hwmon_dev); 833 goto exit_remove_files; 834 } 835 return 0; 836 837 exit_remove_files: 838 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 839 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 840 841 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 842 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 843 844 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 845 return err; 846 } 847 848 static int vt8231_remove(struct platform_device *pdev) 849 { 850 struct vt8231_data *data = platform_get_drvdata(pdev); 851 int i; 852 853 hwmon_device_unregister(data->hwmon_dev); 854 855 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 856 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 857 858 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 859 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 860 861 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 862 863 return 0; 864 } 865 866 static void vt8231_init_device(struct vt8231_data *data) 867 { 868 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0); 869 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0); 870 } 871 872 static struct vt8231_data *vt8231_update_device(struct device *dev) 873 { 874 struct vt8231_data *data = dev_get_drvdata(dev); 875 int i; 876 u16 low; 877 878 mutex_lock(&data->update_lock); 879 880 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 881 || !data->valid) { 882 for (i = 0; i < 6; i++) { 883 if (ISVOLT(i, data->uch_config)) { 884 data->in[i] = vt8231_read_value(data, 885 regvolt[i]); 886 data->in_min[i] = vt8231_read_value(data, 887 regvoltmin[i]); 888 data->in_max[i] = vt8231_read_value(data, 889 regvoltmax[i]); 890 } 891 } 892 for (i = 0; i < 2; i++) { 893 data->fan[i] = vt8231_read_value(data, 894 VT8231_REG_FAN(i)); 895 data->fan_min[i] = vt8231_read_value(data, 896 VT8231_REG_FAN_MIN(i)); 897 } 898 899 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01); 900 low = (low >> 6) | ((low & 0x30) >> 2) 901 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4); 902 for (i = 0; i < 6; i++) { 903 if (ISTEMP(i, data->uch_config)) { 904 data->temp[i] = (vt8231_read_value(data, 905 regtemp[i]) << 2) 906 | ((low >> (2 * i)) & 0x03); 907 data->temp_max[i] = vt8231_read_value(data, 908 regtempmax[i]); 909 data->temp_min[i] = vt8231_read_value(data, 910 regtempmin[i]); 911 } 912 } 913 914 i = vt8231_read_value(data, VT8231_REG_FANDIV); 915 data->fan_div[0] = (i >> 4) & 0x03; 916 data->fan_div[1] = i >> 6; 917 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) | 918 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8); 919 920 /* Set alarm flags correctly */ 921 if (!data->fan[0] && data->fan_min[0]) 922 data->alarms |= 0x40; 923 else if (data->fan[0] && !data->fan_min[0]) 924 data->alarms &= ~0x40; 925 926 if (!data->fan[1] && data->fan_min[1]) 927 data->alarms |= 0x80; 928 else if (data->fan[1] && !data->fan_min[1]) 929 data->alarms &= ~0x80; 930 931 data->last_updated = jiffies; 932 data->valid = true; 933 } 934 935 mutex_unlock(&data->update_lock); 936 937 return data; 938 } 939 940 static int vt8231_device_add(unsigned short address) 941 { 942 struct resource res = { 943 .start = address, 944 .end = address + VT8231_EXTENT - 1, 945 .name = "vt8231", 946 .flags = IORESOURCE_IO, 947 }; 948 int err; 949 950 err = acpi_check_resource_conflict(&res); 951 if (err) 952 goto exit; 953 954 pdev = platform_device_alloc("vt8231", address); 955 if (!pdev) { 956 err = -ENOMEM; 957 pr_err("Device allocation failed\n"); 958 goto exit; 959 } 960 961 err = platform_device_add_resources(pdev, &res, 1); 962 if (err) { 963 pr_err("Device resource addition failed (%d)\n", err); 964 goto exit_device_put; 965 } 966 967 err = platform_device_add(pdev); 968 if (err) { 969 pr_err("Device addition failed (%d)\n", err); 970 goto exit_device_put; 971 } 972 973 return 0; 974 975 exit_device_put: 976 platform_device_put(pdev); 977 exit: 978 return err; 979 } 980 981 static int vt8231_pci_probe(struct pci_dev *dev, 982 const struct pci_device_id *id) 983 { 984 u16 address, val; 985 if (force_addr) { 986 address = force_addr & 0xff00; 987 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", 988 address); 989 990 if (PCIBIOS_SUCCESSFUL != 991 pci_write_config_word(dev, VT8231_BASE_REG, address | 1)) 992 return -ENODEV; 993 } 994 995 pci_read_config_word(dev, VT8231_BASE_REG, &val); 996 if (val == (u16)~0) 997 return -ENODEV; 998 999 address = val & ~(VT8231_EXTENT - 1); 1000 if (address == 0) { 1001 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n"); 1002 return -ENODEV; 1003 } 1004 1005 pci_read_config_word(dev, VT8231_ENABLE_REG, &val); 1006 if (val == (u16)~0) 1007 return -ENODEV; 1008 1009 if (!(val & 0x0001)) { 1010 dev_warn(&dev->dev, "enabling sensors\n"); 1011 if (PCIBIOS_SUCCESSFUL != 1012 pci_write_config_word(dev, VT8231_ENABLE_REG, 1013 val | 0x0001)) 1014 return -ENODEV; 1015 } 1016 1017 if (platform_driver_register(&vt8231_driver)) 1018 goto exit; 1019 1020 /* Sets global pdev as a side effect */ 1021 if (vt8231_device_add(address)) 1022 goto exit_unregister; 1023 1024 /* 1025 * Always return failure here. This is to allow other drivers to bind 1026 * to this pci device. We don't really want to have control over the 1027 * pci device, we only wanted to read as few register values from it. 1028 */ 1029 1030 /* 1031 * We do, however, mark ourselves as using the PCI device to stop it 1032 * getting unloaded. 1033 */ 1034 s_bridge = pci_dev_get(dev); 1035 return -ENODEV; 1036 1037 exit_unregister: 1038 platform_driver_unregister(&vt8231_driver); 1039 exit: 1040 return -ENODEV; 1041 } 1042 1043 static int __init sm_vt8231_init(void) 1044 { 1045 return pci_register_driver(&vt8231_pci_driver); 1046 } 1047 1048 static void __exit sm_vt8231_exit(void) 1049 { 1050 pci_unregister_driver(&vt8231_pci_driver); 1051 if (s_bridge != NULL) { 1052 platform_device_unregister(pdev); 1053 platform_driver_unregister(&vt8231_driver); 1054 pci_dev_put(s_bridge); 1055 s_bridge = NULL; 1056 } 1057 } 1058 1059 MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>"); 1060 MODULE_DESCRIPTION("VT8231 sensors"); 1061 MODULE_LICENSE("GPL"); 1062 1063 module_init(sm_vt8231_init); 1064 module_exit(sm_vt8231_exit); 1065