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/err.h> 26#include <linux/mutex.h> 27#include <linux/acpi.h> 28#include <linux/io.h> 29 30static int force_addr; 31module_param(force_addr, int, 0); 32MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors"); 33 34static struct platform_device *pdev; 35 36#define VT8231_EXTENT 0x80 37#define VT8231_BASE_REG 0x70 38#define VT8231_ENABLE_REG 0x74 39 40#define DRIVER_NAME "vt8231" 41 42/* 43 * The VT8231 registers 44 * 45 * The reset value for the input channel configuration is used (Reg 0x4A=0x07) 46 * which sets the selected inputs marked with '*' below if multiple options are 47 * possible: 48 * 49 * Voltage Mode Temperature Mode 50 * Sensor Linux Id Linux Id VIA Id 51 * -------- -------- -------- ------ 52 * CPU Diode N/A temp1 0 53 * UIC1 in0 temp2 * 1 54 * UIC2 in1 * temp3 2 55 * UIC3 in2 * temp4 3 56 * UIC4 in3 * temp5 4 57 * UIC5 in4 * temp6 5 58 * 3.3V in5 N/A 59 * 60 * Note that the BIOS may set the configuration register to a different value 61 * to match the motherboard configuration. 62 */ 63 64/* fans numbered 0-1 */ 65#define VT8231_REG_FAN_MIN(nr) (0x3b + (nr)) 66#define VT8231_REG_FAN(nr) (0x29 + (nr)) 67 68/* Voltage inputs numbered 0-5 */ 69 70static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 }; 71static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 }; 72static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 }; 73 74/* 75 * Temperatures are numbered 1-6 according to the Linux kernel specification. 76 * 77 * In the VIA datasheet, however, the temperatures are numbered from zero. 78 * Since it is important that this driver can easily be compared to the VIA 79 * datasheet, we will use the VIA numbering within this driver and map the 80 * kernel sysfs device name to the VIA number in the sysfs callback. 81 */ 82 83#define VT8231_REG_TEMP_LOW01 0x49 84#define VT8231_REG_TEMP_LOW25 0x4d 85 86static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 }; 87static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 }; 88static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 }; 89 90#define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210) 91#define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210) 92#define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200) 93 94#define VT8231_REG_CONFIG 0x40 95#define VT8231_REG_ALARM1 0x41 96#define VT8231_REG_ALARM2 0x42 97#define VT8231_REG_FANDIV 0x47 98#define VT8231_REG_UCH_CONFIG 0x4a 99#define VT8231_REG_TEMP1_CONFIG 0x4b 100#define VT8231_REG_TEMP2_CONFIG 0x4c 101 102/* 103 * temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux 104 * numbering 105 */ 106#define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \ 107 ((ch_config) >> ((i)+1)) & 0x01) 108/* voltages 0-5 */ 109#define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \ 110 !(((ch_config) >> ((i)+2)) & 0x01)) 111 112#define DIV_FROM_REG(val) (1 << (val)) 113 114/* 115 * NB The values returned here are NOT temperatures. The calibration curves 116 * for the thermistor curves are board-specific and must go in the 117 * sensors.conf file. Temperature sensors are actually ten bits, but the 118 * VIA datasheet only considers the 8 MSBs obtained from the regtemp[] 119 * register. The temperature value returned should have a magnitude of 3, 120 * so we use the VIA scaling as the "true" scaling and use the remaining 2 121 * LSBs as fractional precision. 122 * 123 * All the on-chip hardware temperature comparisons for the alarms are only 124 * 8-bits wide, and compare against the 8 MSBs of the temperature. The bits 125 * in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are 126 * ignored. 127 */ 128 129/* 130 ****** FAN RPM CONVERSIONS ******** 131 * This chip saturates back at 0, not at 255 like many the other chips. 132 * So, 0 means 0 RPM 133 */ 134static inline u8 FAN_TO_REG(long rpm, int div) 135{ 136 if (rpm <= 0 || rpm > 1310720) 137 return 0; 138 return clamp_val(1310720 / (rpm * div), 1, 255); 139} 140 141#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div))) 142 143struct vt8231_data { 144 unsigned short addr; 145 const char *name; 146 147 struct mutex update_lock; 148 struct device *hwmon_dev; 149 bool valid; /* true if following fields are valid */ 150 unsigned long last_updated; /* In jiffies */ 151 152 u8 in[6]; /* Register value */ 153 u8 in_max[6]; /* Register value */ 154 u8 in_min[6]; /* Register value */ 155 u16 temp[6]; /* Register value 10 bit, right aligned */ 156 u8 temp_max[6]; /* Register value */ 157 u8 temp_min[6]; /* Register value */ 158 u8 fan[2]; /* Register value */ 159 u8 fan_min[2]; /* Register value */ 160 u8 fan_div[2]; /* Register encoding, shifted right */ 161 u16 alarms; /* Register encoding */ 162 u8 uch_config; 163}; 164 165static struct pci_dev *s_bridge; 166 167static inline int vt8231_read_value(struct vt8231_data *data, u8 reg) 168{ 169 return inb_p(data->addr + reg); 170} 171 172static inline void vt8231_write_value(struct vt8231_data *data, u8 reg, 173 u8 value) 174{ 175 outb_p(value, data->addr + reg); 176} 177 178static struct vt8231_data *vt8231_update_device(struct device *dev) 179{ 180 struct vt8231_data *data = dev_get_drvdata(dev); 181 int i; 182 u16 low; 183 184 mutex_lock(&data->update_lock); 185 186 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 187 || !data->valid) { 188 for (i = 0; i < 6; i++) { 189 if (ISVOLT(i, data->uch_config)) { 190 data->in[i] = vt8231_read_value(data, 191 regvolt[i]); 192 data->in_min[i] = vt8231_read_value(data, 193 regvoltmin[i]); 194 data->in_max[i] = vt8231_read_value(data, 195 regvoltmax[i]); 196 } 197 } 198 for (i = 0; i < 2; i++) { 199 data->fan[i] = vt8231_read_value(data, 200 VT8231_REG_FAN(i)); 201 data->fan_min[i] = vt8231_read_value(data, 202 VT8231_REG_FAN_MIN(i)); 203 } 204 205 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01); 206 low = (low >> 6) | ((low & 0x30) >> 2) 207 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4); 208 for (i = 0; i < 6; i++) { 209 if (ISTEMP(i, data->uch_config)) { 210 data->temp[i] = (vt8231_read_value(data, 211 regtemp[i]) << 2) 212 | ((low >> (2 * i)) & 0x03); 213 data->temp_max[i] = vt8231_read_value(data, 214 regtempmax[i]); 215 data->temp_min[i] = vt8231_read_value(data, 216 regtempmin[i]); 217 } 218 } 219 220 i = vt8231_read_value(data, VT8231_REG_FANDIV); 221 data->fan_div[0] = (i >> 4) & 0x03; 222 data->fan_div[1] = i >> 6; 223 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) | 224 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8); 225 226 /* Set alarm flags correctly */ 227 if (!data->fan[0] && data->fan_min[0]) 228 data->alarms |= 0x40; 229 else if (data->fan[0] && !data->fan_min[0]) 230 data->alarms &= ~0x40; 231 232 if (!data->fan[1] && data->fan_min[1]) 233 data->alarms |= 0x80; 234 else if (data->fan[1] && !data->fan_min[1]) 235 data->alarms &= ~0x80; 236 237 data->last_updated = jiffies; 238 data->valid = true; 239 } 240 241 mutex_unlock(&data->update_lock); 242 243 return data; 244} 245 246/* following are the sysfs callback functions */ 247static ssize_t in_show(struct device *dev, struct device_attribute *attr, 248 char *buf) 249{ 250 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 251 int nr = sensor_attr->index; 252 struct vt8231_data *data = vt8231_update_device(dev); 253 254 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958); 255} 256 257static ssize_t in_min_show(struct device *dev, struct device_attribute *attr, 258 char *buf) 259{ 260 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 261 int nr = sensor_attr->index; 262 struct vt8231_data *data = vt8231_update_device(dev); 263 264 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958); 265} 266 267static ssize_t in_max_show(struct device *dev, struct device_attribute *attr, 268 char *buf) 269{ 270 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 271 int nr = sensor_attr->index; 272 struct vt8231_data *data = vt8231_update_device(dev); 273 274 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958)); 275} 276 277static ssize_t in_min_store(struct device *dev, struct device_attribute *attr, 278 const char *buf, size_t count) 279{ 280 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 281 int nr = sensor_attr->index; 282 struct vt8231_data *data = dev_get_drvdata(dev); 283 unsigned long val; 284 int err; 285 286 err = kstrtoul(buf, 10, &val); 287 if (err) 288 return err; 289 290 mutex_lock(&data->update_lock); 291 data->in_min[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255); 292 vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]); 293 mutex_unlock(&data->update_lock); 294 return count; 295} 296 297static ssize_t in_max_store(struct device *dev, struct device_attribute *attr, 298 const char *buf, size_t count) 299{ 300 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 301 int nr = sensor_attr->index; 302 struct vt8231_data *data = dev_get_drvdata(dev); 303 unsigned long val; 304 int err; 305 306 err = kstrtoul(buf, 10, &val); 307 if (err) 308 return err; 309 310 mutex_lock(&data->update_lock); 311 data->in_max[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255); 312 vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]); 313 mutex_unlock(&data->update_lock); 314 return count; 315} 316 317/* Special case for input 5 as this has 3.3V scaling built into the chip */ 318static ssize_t in5_input_show(struct device *dev, 319 struct device_attribute *attr, char *buf) 320{ 321 struct vt8231_data *data = vt8231_update_device(dev); 322 323 return sprintf(buf, "%d\n", 324 (((data->in[5] - 3) * 10000 * 54) / (958 * 34))); 325} 326 327static ssize_t in5_min_show(struct device *dev, struct device_attribute *attr, 328 char *buf) 329{ 330 struct vt8231_data *data = vt8231_update_device(dev); 331 332 return sprintf(buf, "%d\n", 333 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34))); 334} 335 336static ssize_t in5_max_show(struct device *dev, struct device_attribute *attr, 337 char *buf) 338{ 339 struct vt8231_data *data = vt8231_update_device(dev); 340 341 return sprintf(buf, "%d\n", 342 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34))); 343} 344 345static ssize_t in5_min_store(struct device *dev, 346 struct device_attribute *attr, const char *buf, 347 size_t count) 348{ 349 struct vt8231_data *data = dev_get_drvdata(dev); 350 unsigned long val; 351 int err; 352 353 err = kstrtoul(buf, 10, &val); 354 if (err) 355 return err; 356 357 mutex_lock(&data->update_lock); 358 data->in_min[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3, 359 0, 255); 360 vt8231_write_value(data, regvoltmin[5], data->in_min[5]); 361 mutex_unlock(&data->update_lock); 362 return count; 363} 364 365static ssize_t in5_max_store(struct device *dev, 366 struct device_attribute *attr, const char *buf, 367 size_t count) 368{ 369 struct vt8231_data *data = dev_get_drvdata(dev); 370 unsigned long val; 371 int err; 372 373 err = kstrtoul(buf, 10, &val); 374 if (err) 375 return err; 376 377 mutex_lock(&data->update_lock); 378 data->in_max[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3, 379 0, 255); 380 vt8231_write_value(data, regvoltmax[5], data->in_max[5]); 381 mutex_unlock(&data->update_lock); 382 return count; 383} 384 385static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); 386static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); 387static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); 388static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); 389static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); 390static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); 391static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); 392static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); 393static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); 394static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); 395static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); 396static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); 397static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); 398static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); 399static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); 400 401static DEVICE_ATTR_RO(in5_input); 402static DEVICE_ATTR_RW(in5_min); 403static DEVICE_ATTR_RW(in5_max); 404 405/* Temperatures */ 406static ssize_t temp1_input_show(struct device *dev, 407 struct device_attribute *attr, char *buf) 408{ 409 struct vt8231_data *data = vt8231_update_device(dev); 410 return sprintf(buf, "%d\n", data->temp[0] * 250); 411} 412 413static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr, 414 char *buf) 415{ 416 struct vt8231_data *data = vt8231_update_device(dev); 417 return sprintf(buf, "%d\n", data->temp_max[0] * 1000); 418} 419 420static ssize_t temp1_max_hyst_show(struct device *dev, 421 struct device_attribute *attr, char *buf) 422{ 423 struct vt8231_data *data = vt8231_update_device(dev); 424 return sprintf(buf, "%d\n", data->temp_min[0] * 1000); 425} 426 427static ssize_t temp1_max_store(struct device *dev, 428 struct device_attribute *attr, const char *buf, 429 size_t count) 430{ 431 struct vt8231_data *data = dev_get_drvdata(dev); 432 long val; 433 int err; 434 435 err = kstrtol(buf, 10, &val); 436 if (err) 437 return err; 438 439 mutex_lock(&data->update_lock); 440 data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255); 441 vt8231_write_value(data, regtempmax[0], data->temp_max[0]); 442 mutex_unlock(&data->update_lock); 443 return count; 444} 445static ssize_t temp1_max_hyst_store(struct device *dev, 446 struct device_attribute *attr, 447 const char *buf, size_t count) 448{ 449 struct vt8231_data *data = dev_get_drvdata(dev); 450 long val; 451 int err; 452 453 err = kstrtol(buf, 10, &val); 454 if (err) 455 return err; 456 457 mutex_lock(&data->update_lock); 458 data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255); 459 vt8231_write_value(data, regtempmin[0], data->temp_min[0]); 460 mutex_unlock(&data->update_lock); 461 return count; 462} 463 464static ssize_t temp_show(struct device *dev, struct device_attribute *attr, 465 char *buf) 466{ 467 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 468 int nr = sensor_attr->index; 469 struct vt8231_data *data = vt8231_update_device(dev); 470 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 471} 472 473static ssize_t temp_max_show(struct device *dev, 474 struct device_attribute *attr, char *buf) 475{ 476 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 477 int nr = sensor_attr->index; 478 struct vt8231_data *data = vt8231_update_device(dev); 479 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr])); 480} 481 482static ssize_t temp_min_show(struct device *dev, 483 struct device_attribute *attr, char *buf) 484{ 485 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 486 int nr = sensor_attr->index; 487 struct vt8231_data *data = vt8231_update_device(dev); 488 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr])); 489} 490 491static ssize_t temp_max_store(struct device *dev, 492 struct device_attribute *attr, const char *buf, 493 size_t count) 494{ 495 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 496 int nr = sensor_attr->index; 497 struct vt8231_data *data = dev_get_drvdata(dev); 498 long val; 499 int err; 500 501 err = kstrtol(buf, 10, &val); 502 if (err) 503 return err; 504 505 mutex_lock(&data->update_lock); 506 data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255); 507 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]); 508 mutex_unlock(&data->update_lock); 509 return count; 510} 511static ssize_t temp_min_store(struct device *dev, 512 struct device_attribute *attr, const char *buf, 513 size_t count) 514{ 515 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 516 int nr = sensor_attr->index; 517 struct vt8231_data *data = dev_get_drvdata(dev); 518 long val; 519 int err; 520 521 err = kstrtol(buf, 10, &val); 522 if (err) 523 return err; 524 525 mutex_lock(&data->update_lock); 526 data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255); 527 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]); 528 mutex_unlock(&data->update_lock); 529 return count; 530} 531 532/* 533 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA 534 * temperature sensor numbering (0-5) 535 */ 536 537static DEVICE_ATTR_RO(temp1_input); 538static DEVICE_ATTR_RW(temp1_max); 539static DEVICE_ATTR_RW(temp1_max_hyst); 540 541static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); 542static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); 543static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_min, 1); 544static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); 545static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2); 546static SENSOR_DEVICE_ATTR_RW(temp3_max_hyst, temp_min, 2); 547static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3); 548static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3); 549static SENSOR_DEVICE_ATTR_RW(temp4_max_hyst, temp_min, 3); 550static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4); 551static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4); 552static SENSOR_DEVICE_ATTR_RW(temp5_max_hyst, temp_min, 4); 553static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5); 554static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5); 555static SENSOR_DEVICE_ATTR_RW(temp6_max_hyst, temp_min, 5); 556 557/* Fans */ 558static ssize_t fan_show(struct device *dev, struct device_attribute *attr, 559 char *buf) 560{ 561 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 562 int nr = sensor_attr->index; 563 struct vt8231_data *data = vt8231_update_device(dev); 564 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 565 DIV_FROM_REG(data->fan_div[nr]))); 566} 567 568static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr, 569 char *buf) 570{ 571 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 572 int nr = sensor_attr->index; 573 struct vt8231_data *data = vt8231_update_device(dev); 574 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 575 DIV_FROM_REG(data->fan_div[nr]))); 576} 577 578static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr, 579 char *buf) 580{ 581 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 582 int nr = sensor_attr->index; 583 struct vt8231_data *data = vt8231_update_device(dev); 584 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 585} 586 587static ssize_t fan_min_store(struct device *dev, 588 struct device_attribute *attr, const char *buf, 589 size_t count) 590{ 591 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 592 int nr = sensor_attr->index; 593 struct vt8231_data *data = dev_get_drvdata(dev); 594 unsigned long val; 595 int err; 596 597 err = kstrtoul(buf, 10, &val); 598 if (err) 599 return err; 600 601 mutex_lock(&data->update_lock); 602 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 603 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 604 mutex_unlock(&data->update_lock); 605 return count; 606} 607 608static ssize_t fan_div_store(struct device *dev, 609 struct device_attribute *attr, const char *buf, 610 size_t count) 611{ 612 struct vt8231_data *data = dev_get_drvdata(dev); 613 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 614 unsigned long val; 615 int nr = sensor_attr->index; 616 int old = vt8231_read_value(data, VT8231_REG_FANDIV); 617 long min = FAN_FROM_REG(data->fan_min[nr], 618 DIV_FROM_REG(data->fan_div[nr])); 619 int err; 620 621 err = kstrtoul(buf, 10, &val); 622 if (err) 623 return err; 624 625 mutex_lock(&data->update_lock); 626 switch (val) { 627 case 1: 628 data->fan_div[nr] = 0; 629 break; 630 case 2: 631 data->fan_div[nr] = 1; 632 break; 633 case 4: 634 data->fan_div[nr] = 2; 635 break; 636 case 8: 637 data->fan_div[nr] = 3; 638 break; 639 default: 640 dev_err(dev, 641 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", 642 val); 643 mutex_unlock(&data->update_lock); 644 return -EINVAL; 645 } 646 647 /* Correct the fan minimum speed */ 648 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 649 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 650 651 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); 652 vt8231_write_value(data, VT8231_REG_FANDIV, old); 653 mutex_unlock(&data->update_lock); 654 return count; 655} 656 657static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); 658static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); 659static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); 660static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); 661static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); 662static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); 663 664/* Alarms */ 665static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, 666 char *buf) 667{ 668 struct vt8231_data *data = vt8231_update_device(dev); 669 return sprintf(buf, "%d\n", data->alarms); 670} 671static DEVICE_ATTR_RO(alarms); 672 673static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, 674 char *buf) 675{ 676 int bitnr = to_sensor_dev_attr(attr)->index; 677 struct vt8231_data *data = vt8231_update_device(dev); 678 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 679} 680static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); 681static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 11); 682static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 0); 683static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, 1); 684static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, 3); 685static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, 8); 686static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 11); 687static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 0); 688static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 1); 689static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); 690static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8); 691static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 2); 692static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6); 693static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7); 694 695static ssize_t name_show(struct device *dev, struct device_attribute 696 *devattr, char *buf) 697{ 698 struct vt8231_data *data = dev_get_drvdata(dev); 699 return sprintf(buf, "%s\n", data->name); 700} 701static DEVICE_ATTR_RO(name); 702 703static struct attribute *vt8231_attributes_temps[6][5] = { 704 { 705 &dev_attr_temp1_input.attr, 706 &dev_attr_temp1_max_hyst.attr, 707 &dev_attr_temp1_max.attr, 708 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 709 NULL 710 }, { 711 &sensor_dev_attr_temp2_input.dev_attr.attr, 712 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 713 &sensor_dev_attr_temp2_max.dev_attr.attr, 714 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 715 NULL 716 }, { 717 &sensor_dev_attr_temp3_input.dev_attr.attr, 718 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, 719 &sensor_dev_attr_temp3_max.dev_attr.attr, 720 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 721 NULL 722 }, { 723 &sensor_dev_attr_temp4_input.dev_attr.attr, 724 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, 725 &sensor_dev_attr_temp4_max.dev_attr.attr, 726 &sensor_dev_attr_temp4_alarm.dev_attr.attr, 727 NULL 728 }, { 729 &sensor_dev_attr_temp5_input.dev_attr.attr, 730 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, 731 &sensor_dev_attr_temp5_max.dev_attr.attr, 732 &sensor_dev_attr_temp5_alarm.dev_attr.attr, 733 NULL 734 }, { 735 &sensor_dev_attr_temp6_input.dev_attr.attr, 736 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr, 737 &sensor_dev_attr_temp6_max.dev_attr.attr, 738 &sensor_dev_attr_temp6_alarm.dev_attr.attr, 739 NULL 740 } 741}; 742 743static const struct attribute_group vt8231_group_temps[6] = { 744 { .attrs = vt8231_attributes_temps[0] }, 745 { .attrs = vt8231_attributes_temps[1] }, 746 { .attrs = vt8231_attributes_temps[2] }, 747 { .attrs = vt8231_attributes_temps[3] }, 748 { .attrs = vt8231_attributes_temps[4] }, 749 { .attrs = vt8231_attributes_temps[5] }, 750}; 751 752static struct attribute *vt8231_attributes_volts[6][5] = { 753 { 754 &sensor_dev_attr_in0_input.dev_attr.attr, 755 &sensor_dev_attr_in0_min.dev_attr.attr, 756 &sensor_dev_attr_in0_max.dev_attr.attr, 757 &sensor_dev_attr_in0_alarm.dev_attr.attr, 758 NULL 759 }, { 760 &sensor_dev_attr_in1_input.dev_attr.attr, 761 &sensor_dev_attr_in1_min.dev_attr.attr, 762 &sensor_dev_attr_in1_max.dev_attr.attr, 763 &sensor_dev_attr_in1_alarm.dev_attr.attr, 764 NULL 765 }, { 766 &sensor_dev_attr_in2_input.dev_attr.attr, 767 &sensor_dev_attr_in2_min.dev_attr.attr, 768 &sensor_dev_attr_in2_max.dev_attr.attr, 769 &sensor_dev_attr_in2_alarm.dev_attr.attr, 770 NULL 771 }, { 772 &sensor_dev_attr_in3_input.dev_attr.attr, 773 &sensor_dev_attr_in3_min.dev_attr.attr, 774 &sensor_dev_attr_in3_max.dev_attr.attr, 775 &sensor_dev_attr_in3_alarm.dev_attr.attr, 776 NULL 777 }, { 778 &sensor_dev_attr_in4_input.dev_attr.attr, 779 &sensor_dev_attr_in4_min.dev_attr.attr, 780 &sensor_dev_attr_in4_max.dev_attr.attr, 781 &sensor_dev_attr_in4_alarm.dev_attr.attr, 782 NULL 783 }, { 784 &dev_attr_in5_input.attr, 785 &dev_attr_in5_min.attr, 786 &dev_attr_in5_max.attr, 787 &sensor_dev_attr_in5_alarm.dev_attr.attr, 788 NULL 789 } 790}; 791 792static const struct attribute_group vt8231_group_volts[6] = { 793 { .attrs = vt8231_attributes_volts[0] }, 794 { .attrs = vt8231_attributes_volts[1] }, 795 { .attrs = vt8231_attributes_volts[2] }, 796 { .attrs = vt8231_attributes_volts[3] }, 797 { .attrs = vt8231_attributes_volts[4] }, 798 { .attrs = vt8231_attributes_volts[5] }, 799}; 800 801static struct attribute *vt8231_attributes[] = { 802 &sensor_dev_attr_fan1_input.dev_attr.attr, 803 &sensor_dev_attr_fan2_input.dev_attr.attr, 804 &sensor_dev_attr_fan1_min.dev_attr.attr, 805 &sensor_dev_attr_fan2_min.dev_attr.attr, 806 &sensor_dev_attr_fan1_div.dev_attr.attr, 807 &sensor_dev_attr_fan2_div.dev_attr.attr, 808 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 809 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 810 &dev_attr_alarms.attr, 811 &dev_attr_name.attr, 812 NULL 813}; 814 815static const struct attribute_group vt8231_group = { 816 .attrs = vt8231_attributes, 817}; 818 819static void vt8231_init_device(struct vt8231_data *data) 820{ 821 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0); 822 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0); 823} 824 825static int vt8231_probe(struct platform_device *pdev) 826{ 827 struct resource *res; 828 struct vt8231_data *data; 829 int err = 0, i; 830 831 /* Reserve the ISA region */ 832 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 833 if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT, 834 DRIVER_NAME)) { 835 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n", 836 (unsigned long)res->start, (unsigned long)res->end); 837 return -ENODEV; 838 } 839 840 data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL); 841 if (!data) 842 return -ENOMEM; 843 844 platform_set_drvdata(pdev, data); 845 data->addr = res->start; 846 data->name = DRIVER_NAME; 847 848 mutex_init(&data->update_lock); 849 vt8231_init_device(data); 850 851 /* Register sysfs hooks */ 852 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group); 853 if (err) 854 return err; 855 856 /* Must update device information to find out the config field */ 857 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG); 858 859 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) { 860 if (ISTEMP(i, data->uch_config)) { 861 err = sysfs_create_group(&pdev->dev.kobj, 862 &vt8231_group_temps[i]); 863 if (err) 864 goto exit_remove_files; 865 } 866 } 867 868 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) { 869 if (ISVOLT(i, data->uch_config)) { 870 err = sysfs_create_group(&pdev->dev.kobj, 871 &vt8231_group_volts[i]); 872 if (err) 873 goto exit_remove_files; 874 } 875 } 876 877 data->hwmon_dev = hwmon_device_register(&pdev->dev); 878 if (IS_ERR(data->hwmon_dev)) { 879 err = PTR_ERR(data->hwmon_dev); 880 goto exit_remove_files; 881 } 882 return 0; 883 884exit_remove_files: 885 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 886 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 887 888 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 889 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 890 891 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 892 return err; 893} 894 895static void vt8231_remove(struct platform_device *pdev) 896{ 897 struct vt8231_data *data = platform_get_drvdata(pdev); 898 int i; 899 900 hwmon_device_unregister(data->hwmon_dev); 901 902 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 903 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 904 905 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 906 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 907 908 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 909} 910 911 912static struct platform_driver vt8231_driver = { 913 .driver = { 914 .name = DRIVER_NAME, 915 }, 916 .probe = vt8231_probe, 917 .remove_new = vt8231_remove, 918}; 919 920static const struct pci_device_id vt8231_pci_ids[] = { 921 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) }, 922 { 0, } 923}; 924 925MODULE_DEVICE_TABLE(pci, vt8231_pci_ids); 926 927static int vt8231_device_add(unsigned short address) 928{ 929 struct resource res = { 930 .start = address, 931 .end = address + VT8231_EXTENT - 1, 932 .name = DRIVER_NAME, 933 .flags = IORESOURCE_IO, 934 }; 935 int err; 936 937 err = acpi_check_resource_conflict(&res); 938 if (err) 939 goto exit; 940 941 pdev = platform_device_alloc(DRIVER_NAME, address); 942 if (!pdev) { 943 err = -ENOMEM; 944 pr_err("Device allocation failed\n"); 945 goto exit; 946 } 947 948 err = platform_device_add_resources(pdev, &res, 1); 949 if (err) { 950 pr_err("Device resource addition failed (%d)\n", err); 951 goto exit_device_put; 952 } 953 954 err = platform_device_add(pdev); 955 if (err) { 956 pr_err("Device addition failed (%d)\n", err); 957 goto exit_device_put; 958 } 959 960 return 0; 961 962exit_device_put: 963 platform_device_put(pdev); 964exit: 965 return err; 966} 967 968static int vt8231_pci_probe(struct pci_dev *dev, 969 const struct pci_device_id *id) 970{ 971 u16 address, val; 972 int ret; 973 974 if (force_addr) { 975 address = force_addr & 0xff00; 976 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", 977 address); 978 979 ret = pci_write_config_word(dev, VT8231_BASE_REG, address | 1); 980 if (ret != PCIBIOS_SUCCESSFUL) 981 return -ENODEV; 982 } 983 984 pci_read_config_word(dev, VT8231_BASE_REG, &val); 985 if (val == (u16)~0) 986 return -ENODEV; 987 988 address = val & ~(VT8231_EXTENT - 1); 989 if (address == 0) { 990 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n"); 991 return -ENODEV; 992 } 993 994 pci_read_config_word(dev, VT8231_ENABLE_REG, &val); 995 if (val == (u16)~0) 996 return -ENODEV; 997 998 if (!(val & 0x0001)) { 999 dev_warn(&dev->dev, "enabling sensors\n"); 1000 ret = pci_write_config_word(dev, VT8231_ENABLE_REG, val | 0x1); 1001 if (ret != PCIBIOS_SUCCESSFUL) 1002 return -ENODEV; 1003 } 1004 1005 if (platform_driver_register(&vt8231_driver)) 1006 goto exit; 1007 1008 /* Sets global pdev as a side effect */ 1009 if (vt8231_device_add(address)) 1010 goto exit_unregister; 1011 1012 /* 1013 * Always return failure here. This is to allow other drivers to bind 1014 * to this pci device. We don't really want to have control over the 1015 * pci device, we only wanted to read as few register values from it. 1016 */ 1017 1018 /* 1019 * We do, however, mark ourselves as using the PCI device to stop it 1020 * getting unloaded. 1021 */ 1022 s_bridge = pci_dev_get(dev); 1023 return -ENODEV; 1024 1025exit_unregister: 1026 platform_driver_unregister(&vt8231_driver); 1027exit: 1028 return -ENODEV; 1029} 1030 1031static struct pci_driver vt8231_pci_driver = { 1032 .name = DRIVER_NAME, 1033 .id_table = vt8231_pci_ids, 1034 .probe = vt8231_pci_probe, 1035}; 1036 1037static int __init sm_vt8231_init(void) 1038{ 1039 return pci_register_driver(&vt8231_pci_driver); 1040} 1041 1042static void __exit sm_vt8231_exit(void) 1043{ 1044 pci_unregister_driver(&vt8231_pci_driver); 1045 if (s_bridge != NULL) { 1046 platform_device_unregister(pdev); 1047 platform_driver_unregister(&vt8231_driver); 1048 pci_dev_put(s_bridge); 1049 s_bridge = NULL; 1050 } 1051} 1052 1053MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>"); 1054MODULE_DESCRIPTION("VT8231 sensors"); 1055MODULE_LICENSE("GPL"); 1056 1057module_init(sm_vt8231_init); 1058module_exit(sm_vt8231_exit); 1059