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vt8231.c
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linux-6.19.14/drivers/hwmon/vt8231.c
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 141static int fan_from_reg(int val, int div) 142{ 143 if (val == 0) 144 return 0; 145 return 1310720 / (val * div); 146} 147 148struct vt8231_data { 149 unsigned short addr; 150 const char *name; 151 152 struct mutex update_lock; 153 struct device *hwmon_dev; 154 bool valid; /* true if following fields are valid */ 155 unsigned long last_updated; /* In jiffies */ 156 157 u8 in[6]; /* Register value */ 158 u8 in_max[6]; /* Register value */ 159 u8 in_min[6]; /* Register value */ 160 u16 temp[6]; /* Register value 10 bit, right aligned */ 161 u8 temp_max[6]; /* Register value */ 162 u8 temp_min[6]; /* Register value */ 163 u8 fan[2]; /* Register value */ 164 u8 fan_min[2]; /* Register value */ 165 u8 fan_div[2]; /* Register encoding, shifted right */ 166 u16 alarms; /* Register encoding */ 167 u8 uch_config; 168}; 169 170static struct pci_dev *s_bridge; 171 172static inline int vt8231_read_value(struct vt8231_data *data, u8 reg) 173{ 174 return inb_p(data->addr + reg); 175} 176 177static inline void vt8231_write_value(struct vt8231_data *data, u8 reg, 178 u8 value) 179{ 180 outb_p(value, data->addr + reg); 181} 182 183static struct vt8231_data *vt8231_update_device(struct device *dev) 184{ 185 struct vt8231_data *data = dev_get_drvdata(dev); 186 int i; 187 u16 low; 188 189 mutex_lock(&data->update_lock); 190 191 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 192 || !data->valid) { 193 for (i = 0; i < 6; i++) { 194 if (ISVOLT(i, data->uch_config)) { 195 data->in[i] = vt8231_read_value(data, 196 regvolt[i]); 197 data->in_min[i] = vt8231_read_value(data, 198 regvoltmin[i]); 199 data->in_max[i] = vt8231_read_value(data, 200 regvoltmax[i]); 201 } 202 } 203 for (i = 0; i < 2; i++) { 204 data->fan[i] = vt8231_read_value(data, 205 VT8231_REG_FAN(i)); 206 data->fan_min[i] = vt8231_read_value(data, 207 VT8231_REG_FAN_MIN(i)); 208 } 209 210 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01); 211 low = (low >> 6) | ((low & 0x30) >> 2) 212 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4); 213 for (i = 0; i < 6; i++) { 214 if (ISTEMP(i, data->uch_config)) { 215 data->temp[i] = (vt8231_read_value(data, 216 regtemp[i]) << 2) 217 | ((low >> (2 * i)) & 0x03); 218 data->temp_max[i] = vt8231_read_value(data, 219 regtempmax[i]); 220 data->temp_min[i] = vt8231_read_value(data, 221 regtempmin[i]); 222 } 223 } 224 225 i = vt8231_read_value(data, VT8231_REG_FANDIV); 226 data->fan_div[0] = (i >> 4) & 0x03; 227 data->fan_div[1] = i >> 6; 228 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) | 229 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8); 230 231 /* Set alarm flags correctly */ 232 if (!data->fan[0] && data->fan_min[0]) 233 data->alarms |= 0x40; 234 else if (data->fan[0] && !data->fan_min[0]) 235 data->alarms &= ~0x40; 236 237 if (!data->fan[1] && data->fan_min[1]) 238 data->alarms |= 0x80; 239 else if (data->fan[1] && !data->fan_min[1]) 240 data->alarms &= ~0x80; 241 242 data->last_updated = jiffies; 243 data->valid = true; 244 } 245 246 mutex_unlock(&data->update_lock); 247 248 return data; 249} 250 251/* following are the sysfs callback functions */ 252static ssize_t in_show(struct device *dev, struct device_attribute *attr, 253 char *buf) 254{ 255 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 256 int nr = sensor_attr->index; 257 struct vt8231_data *data = vt8231_update_device(dev); 258 259 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958); 260} 261 262static ssize_t in_min_show(struct device *dev, struct device_attribute *attr, 263 char *buf) 264{ 265 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 266 int nr = sensor_attr->index; 267 struct vt8231_data *data = vt8231_update_device(dev); 268 269 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958); 270} 271 272static ssize_t in_max_show(struct device *dev, struct device_attribute *attr, 273 char *buf) 274{ 275 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 276 int nr = sensor_attr->index; 277 struct vt8231_data *data = vt8231_update_device(dev); 278 279 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958)); 280} 281 282static ssize_t in_min_store(struct device *dev, struct device_attribute *attr, 283 const char *buf, size_t count) 284{ 285 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 286 int nr = sensor_attr->index; 287 struct vt8231_data *data = dev_get_drvdata(dev); 288 unsigned long val; 289 int err; 290 291 err = kstrtoul(buf, 10, &val); 292 if (err) 293 return err; 294 295 mutex_lock(&data->update_lock); 296 data->in_min[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255); 297 vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]); 298 mutex_unlock(&data->update_lock); 299 return count; 300} 301 302static ssize_t in_max_store(struct device *dev, struct device_attribute *attr, 303 const char *buf, size_t count) 304{ 305 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 306 int nr = sensor_attr->index; 307 struct vt8231_data *data = dev_get_drvdata(dev); 308 unsigned long val; 309 int err; 310 311 err = kstrtoul(buf, 10, &val); 312 if (err) 313 return err; 314 315 mutex_lock(&data->update_lock); 316 data->in_max[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255); 317 vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]); 318 mutex_unlock(&data->update_lock); 319 return count; 320} 321 322/* Special case for input 5 as this has 3.3V scaling built into the chip */ 323static ssize_t in5_input_show(struct device *dev, 324 struct device_attribute *attr, char *buf) 325{ 326 struct vt8231_data *data = vt8231_update_device(dev); 327 328 return sprintf(buf, "%d\n", 329 (((data->in[5] - 3) * 10000 * 54) / (958 * 34))); 330} 331 332static ssize_t in5_min_show(struct device *dev, struct device_attribute *attr, 333 char *buf) 334{ 335 struct vt8231_data *data = vt8231_update_device(dev); 336 337 return sprintf(buf, "%d\n", 338 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34))); 339} 340 341static ssize_t in5_max_show(struct device *dev, struct device_attribute *attr, 342 char *buf) 343{ 344 struct vt8231_data *data = vt8231_update_device(dev); 345 346 return sprintf(buf, "%d\n", 347 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34))); 348} 349 350static ssize_t in5_min_store(struct device *dev, 351 struct device_attribute *attr, const char *buf, 352 size_t count) 353{ 354 struct vt8231_data *data = dev_get_drvdata(dev); 355 unsigned long val; 356 int err; 357 358 err = kstrtoul(buf, 10, &val); 359 if (err) 360 return err; 361 362 mutex_lock(&data->update_lock); 363 data->in_min[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3, 364 0, 255); 365 vt8231_write_value(data, regvoltmin[5], data->in_min[5]); 366 mutex_unlock(&data->update_lock); 367 return count; 368} 369 370static ssize_t in5_max_store(struct device *dev, 371 struct device_attribute *attr, const char *buf, 372 size_t count) 373{ 374 struct vt8231_data *data = dev_get_drvdata(dev); 375 unsigned long val; 376 int err; 377 378 err = kstrtoul(buf, 10, &val); 379 if (err) 380 return err; 381 382 mutex_lock(&data->update_lock); 383 data->in_max[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3, 384 0, 255); 385 vt8231_write_value(data, regvoltmax[5], data->in_max[5]); 386 mutex_unlock(&data->update_lock); 387 return count; 388} 389 390static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); 391static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); 392static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); 393static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); 394static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); 395static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); 396static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); 397static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); 398static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); 399static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); 400static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); 401static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); 402static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); 403static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); 404static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); 405 406static DEVICE_ATTR_RO(in5_input); 407static DEVICE_ATTR_RW(in5_min); 408static DEVICE_ATTR_RW(in5_max); 409 410/* Temperatures */ 411static ssize_t temp1_input_show(struct device *dev, 412 struct device_attribute *attr, char *buf) 413{ 414 struct vt8231_data *data = vt8231_update_device(dev); 415 return sprintf(buf, "%d\n", data->temp[0] * 250); 416} 417 418static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr, 419 char *buf) 420{ 421 struct vt8231_data *data = vt8231_update_device(dev); 422 return sprintf(buf, "%d\n", data->temp_max[0] * 1000); 423} 424 425static ssize_t temp1_max_hyst_show(struct device *dev, 426 struct device_attribute *attr, char *buf) 427{ 428 struct vt8231_data *data = vt8231_update_device(dev); 429 return sprintf(buf, "%d\n", data->temp_min[0] * 1000); 430} 431 432static ssize_t temp1_max_store(struct device *dev, 433 struct device_attribute *attr, const char *buf, 434 size_t count) 435{ 436 struct vt8231_data *data = dev_get_drvdata(dev); 437 long val; 438 int err; 439 440 err = kstrtol(buf, 10, &val); 441 if (err) 442 return err; 443 444 mutex_lock(&data->update_lock); 445 data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255); 446 vt8231_write_value(data, regtempmax[0], data->temp_max[0]); 447 mutex_unlock(&data->update_lock); 448 return count; 449} 450static ssize_t temp1_max_hyst_store(struct device *dev, 451 struct device_attribute *attr, 452 const char *buf, size_t count) 453{ 454 struct vt8231_data *data = dev_get_drvdata(dev); 455 long val; 456 int err; 457 458 err = kstrtol(buf, 10, &val); 459 if (err) 460 return err; 461 462 mutex_lock(&data->update_lock); 463 data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255); 464 vt8231_write_value(data, regtempmin[0], data->temp_min[0]); 465 mutex_unlock(&data->update_lock); 466 return count; 467} 468 469static ssize_t temp_show(struct device *dev, struct device_attribute *attr, 470 char *buf) 471{ 472 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 473 int nr = sensor_attr->index; 474 struct vt8231_data *data = vt8231_update_device(dev); 475 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 476} 477 478static ssize_t temp_max_show(struct device *dev, 479 struct device_attribute *attr, char *buf) 480{ 481 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 482 int nr = sensor_attr->index; 483 struct vt8231_data *data = vt8231_update_device(dev); 484 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr])); 485} 486 487static ssize_t temp_min_show(struct device *dev, 488 struct device_attribute *attr, char *buf) 489{ 490 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 491 int nr = sensor_attr->index; 492 struct vt8231_data *data = vt8231_update_device(dev); 493 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr])); 494} 495 496static ssize_t temp_max_store(struct device *dev, 497 struct device_attribute *attr, const char *buf, 498 size_t count) 499{ 500 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 501 int nr = sensor_attr->index; 502 struct vt8231_data *data = dev_get_drvdata(dev); 503 long val; 504 int err; 505 506 err = kstrtol(buf, 10, &val); 507 if (err) 508 return err; 509 510 mutex_lock(&data->update_lock); 511 data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255); 512 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]); 513 mutex_unlock(&data->update_lock); 514 return count; 515} 516static ssize_t temp_min_store(struct device *dev, 517 struct device_attribute *attr, const char *buf, 518 size_t count) 519{ 520 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 521 int nr = sensor_attr->index; 522 struct vt8231_data *data = dev_get_drvdata(dev); 523 long val; 524 int err; 525 526 err = kstrtol(buf, 10, &val); 527 if (err) 528 return err; 529 530 mutex_lock(&data->update_lock); 531 data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255); 532 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]); 533 mutex_unlock(&data->update_lock); 534 return count; 535} 536 537/* 538 * Note that these map the Linux temperature sensor numbering (1-6) to the VIA 539 * temperature sensor numbering (0-5) 540 */ 541 542static DEVICE_ATTR_RO(temp1_input); 543static DEVICE_ATTR_RW(temp1_max); 544static DEVICE_ATTR_RW(temp1_max_hyst); 545 546static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); 547static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); 548static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_min, 1); 549static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); 550static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2); 551static SENSOR_DEVICE_ATTR_RW(temp3_max_hyst, temp_min, 2); 552static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3); 553static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3); 554static SENSOR_DEVICE_ATTR_RW(temp4_max_hyst, temp_min, 3); 555static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4); 556static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4); 557static SENSOR_DEVICE_ATTR_RW(temp5_max_hyst, temp_min, 4); 558static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5); 559static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5); 560static SENSOR_DEVICE_ATTR_RW(temp6_max_hyst, temp_min, 5); 561 562/* Fans */ 563static ssize_t fan_show(struct device *dev, struct device_attribute *attr, 564 char *buf) 565{ 566 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 567 int nr = sensor_attr->index; 568 struct vt8231_data *data = vt8231_update_device(dev); 569 return sprintf(buf, "%d\n", fan_from_reg(data->fan[nr], 570 DIV_FROM_REG(data->fan_div[nr]))); 571} 572 573static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr, 574 char *buf) 575{ 576 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 577 int nr = sensor_attr->index; 578 struct vt8231_data *data = vt8231_update_device(dev); 579 return sprintf(buf, "%d\n", fan_from_reg(data->fan_min[nr], 580 DIV_FROM_REG(data->fan_div[nr]))); 581} 582 583static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr, 584 char *buf) 585{ 586 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 587 int nr = sensor_attr->index; 588 struct vt8231_data *data = vt8231_update_device(dev); 589 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 590} 591 592static ssize_t fan_min_store(struct device *dev, 593 struct device_attribute *attr, const char *buf, 594 size_t count) 595{ 596 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 597 int nr = sensor_attr->index; 598 struct vt8231_data *data = dev_get_drvdata(dev); 599 unsigned long val; 600 int err; 601 602 err = kstrtoul(buf, 10, &val); 603 if (err) 604 return err; 605 606 mutex_lock(&data->update_lock); 607 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 608 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 609 mutex_unlock(&data->update_lock); 610 return count; 611} 612 613static ssize_t fan_div_store(struct device *dev, 614 struct device_attribute *attr, const char *buf, 615 size_t count) 616{ 617 struct vt8231_data *data = dev_get_drvdata(dev); 618 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 619 unsigned long val; 620 int nr = sensor_attr->index; 621 int old; 622 long min; 623 int err; 624 625 err = kstrtoul(buf, 10, &val); 626 if (err) 627 return err; 628 629 mutex_lock(&data->update_lock); 630 old = vt8231_read_value(data, VT8231_REG_FANDIV); 631 min = fan_from_reg(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 632 switch (val) { 633 case 1: 634 data->fan_div[nr] = 0; 635 break; 636 case 2: 637 data->fan_div[nr] = 1; 638 break; 639 case 4: 640 data->fan_div[nr] = 2; 641 break; 642 case 8: 643 data->fan_div[nr] = 3; 644 break; 645 default: 646 dev_err(dev, 647 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", 648 val); 649 mutex_unlock(&data->update_lock); 650 return -EINVAL; 651 } 652 653 /* Correct the fan minimum speed */ 654 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 655 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 656 657 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); 658 vt8231_write_value(data, VT8231_REG_FANDIV, old); 659 mutex_unlock(&data->update_lock); 660 return count; 661} 662 663static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); 664static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); 665static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); 666static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); 667static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); 668static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); 669 670/* Alarms */ 671static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, 672 char *buf) 673{ 674 struct vt8231_data *data = vt8231_update_device(dev); 675 return sprintf(buf, "%d\n", data->alarms); 676} 677static DEVICE_ATTR_RO(alarms); 678 679static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, 680 char *buf) 681{ 682 int bitnr = to_sensor_dev_attr(attr)->index; 683 struct vt8231_data *data = vt8231_update_device(dev); 684 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 685} 686static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); 687static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 11); 688static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 0); 689static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, 1); 690static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, 3); 691static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, 8); 692static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 11); 693static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 0); 694static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 1); 695static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); 696static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8); 697static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 2); 698static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6); 699static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7); 700 701static ssize_t name_show(struct device *dev, struct device_attribute 702 *devattr, char *buf) 703{ 704 struct vt8231_data *data = dev_get_drvdata(dev); 705 return sprintf(buf, "%s\n", data->name); 706} 707static DEVICE_ATTR_RO(name); 708 709static struct attribute *vt8231_attributes_temps[6][5] = { 710 { 711 &dev_attr_temp1_input.attr, 712 &dev_attr_temp1_max_hyst.attr, 713 &dev_attr_temp1_max.attr, 714 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 715 NULL 716 }, { 717 &sensor_dev_attr_temp2_input.dev_attr.attr, 718 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 719 &sensor_dev_attr_temp2_max.dev_attr.attr, 720 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 721 NULL 722 }, { 723 &sensor_dev_attr_temp3_input.dev_attr.attr, 724 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, 725 &sensor_dev_attr_temp3_max.dev_attr.attr, 726 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 727 NULL 728 }, { 729 &sensor_dev_attr_temp4_input.dev_attr.attr, 730 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, 731 &sensor_dev_attr_temp4_max.dev_attr.attr, 732 &sensor_dev_attr_temp4_alarm.dev_attr.attr, 733 NULL 734 }, { 735 &sensor_dev_attr_temp5_input.dev_attr.attr, 736 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, 737 &sensor_dev_attr_temp5_max.dev_attr.attr, 738 &sensor_dev_attr_temp5_alarm.dev_attr.attr, 739 NULL 740 }, { 741 &sensor_dev_attr_temp6_input.dev_attr.attr, 742 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr, 743 &sensor_dev_attr_temp6_max.dev_attr.attr, 744 &sensor_dev_attr_temp6_alarm.dev_attr.attr, 745 NULL 746 } 747}; 748 749static const struct attribute_group vt8231_group_temps[6] = { 750 { .attrs = vt8231_attributes_temps[0] }, 751 { .attrs = vt8231_attributes_temps[1] }, 752 { .attrs = vt8231_attributes_temps[2] }, 753 { .attrs = vt8231_attributes_temps[3] }, 754 { .attrs = vt8231_attributes_temps[4] }, 755 { .attrs = vt8231_attributes_temps[5] }, 756}; 757 758static struct attribute *vt8231_attributes_volts[6][5] = { 759 { 760 &sensor_dev_attr_in0_input.dev_attr.attr, 761 &sensor_dev_attr_in0_min.dev_attr.attr, 762 &sensor_dev_attr_in0_max.dev_attr.attr, 763 &sensor_dev_attr_in0_alarm.dev_attr.attr, 764 NULL 765 }, { 766 &sensor_dev_attr_in1_input.dev_attr.attr, 767 &sensor_dev_attr_in1_min.dev_attr.attr, 768 &sensor_dev_attr_in1_max.dev_attr.attr, 769 &sensor_dev_attr_in1_alarm.dev_attr.attr, 770 NULL 771 }, { 772 &sensor_dev_attr_in2_input.dev_attr.attr, 773 &sensor_dev_attr_in2_min.dev_attr.attr, 774 &sensor_dev_attr_in2_max.dev_attr.attr, 775 &sensor_dev_attr_in2_alarm.dev_attr.attr, 776 NULL 777 }, { 778 &sensor_dev_attr_in3_input.dev_attr.attr, 779 &sensor_dev_attr_in3_min.dev_attr.attr, 780 &sensor_dev_attr_in3_max.dev_attr.attr, 781 &sensor_dev_attr_in3_alarm.dev_attr.attr, 782 NULL 783 }, { 784 &sensor_dev_attr_in4_input.dev_attr.attr, 785 &sensor_dev_attr_in4_min.dev_attr.attr, 786 &sensor_dev_attr_in4_max.dev_attr.attr, 787 &sensor_dev_attr_in4_alarm.dev_attr.attr, 788 NULL 789 }, { 790 &dev_attr_in5_input.attr, 791 &dev_attr_in5_min.attr, 792 &dev_attr_in5_max.attr, 793 &sensor_dev_attr_in5_alarm.dev_attr.attr, 794 NULL 795 } 796}; 797 798static const struct attribute_group vt8231_group_volts[6] = { 799 { .attrs = vt8231_attributes_volts[0] }, 800 { .attrs = vt8231_attributes_volts[1] }, 801 { .attrs = vt8231_attributes_volts[2] }, 802 { .attrs = vt8231_attributes_volts[3] }, 803 { .attrs = vt8231_attributes_volts[4] }, 804 { .attrs = vt8231_attributes_volts[5] }, 805}; 806 807static struct attribute *vt8231_attributes[] = { 808 &sensor_dev_attr_fan1_input.dev_attr.attr, 809 &sensor_dev_attr_fan2_input.dev_attr.attr, 810 &sensor_dev_attr_fan1_min.dev_attr.attr, 811 &sensor_dev_attr_fan2_min.dev_attr.attr, 812 &sensor_dev_attr_fan1_div.dev_attr.attr, 813 &sensor_dev_attr_fan2_div.dev_attr.attr, 814 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 815 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 816 &dev_attr_alarms.attr, 817 &dev_attr_name.attr, 818 NULL 819}; 820 821static const struct attribute_group vt8231_group = { 822 .attrs = vt8231_attributes, 823}; 824 825static void vt8231_init_device(struct vt8231_data *data) 826{ 827 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0); 828 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0); 829} 830 831static int vt8231_probe(struct platform_device *pdev) 832{ 833 struct resource *res; 834 struct vt8231_data *data; 835 int err = 0, i; 836 837 /* Reserve the ISA region */ 838 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 839 if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT, 840 DRIVER_NAME)) { 841 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n", 842 (unsigned long)res->start, (unsigned long)res->end); 843 return -ENODEV; 844 } 845 846 data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL); 847 if (!data) 848 return -ENOMEM; 849 850 platform_set_drvdata(pdev, data); 851 data->addr = res->start; 852 data->name = DRIVER_NAME; 853 854 mutex_init(&data->update_lock); 855 vt8231_init_device(data); 856 857 /* Register sysfs hooks */ 858 err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group); 859 if (err) 860 return err; 861 862 /* Must update device information to find out the config field */ 863 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG); 864 865 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) { 866 if (ISTEMP(i, data->uch_config)) { 867 err = sysfs_create_group(&pdev->dev.kobj, 868 &vt8231_group_temps[i]); 869 if (err) 870 goto exit_remove_files; 871 } 872 } 873 874 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) { 875 if (ISVOLT(i, data->uch_config)) { 876 err = sysfs_create_group(&pdev->dev.kobj, 877 &vt8231_group_volts[i]); 878 if (err) 879 goto exit_remove_files; 880 } 881 } 882 883 data->hwmon_dev = hwmon_device_register(&pdev->dev); 884 if (IS_ERR(data->hwmon_dev)) { 885 err = PTR_ERR(data->hwmon_dev); 886 goto exit_remove_files; 887 } 888 return 0; 889 890exit_remove_files: 891 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 892 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 893 894 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 895 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 896 897 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 898 return err; 899} 900 901static void vt8231_remove(struct platform_device *pdev) 902{ 903 struct vt8231_data *data = platform_get_drvdata(pdev); 904 int i; 905 906 hwmon_device_unregister(data->hwmon_dev); 907 908 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 909 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 910 911 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 912 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 913 914 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 915} 916 917 918static struct platform_driver vt8231_driver = { 919 .driver = { 920 .name = DRIVER_NAME, 921 }, 922 .probe = vt8231_probe, 923 .remove = vt8231_remove, 924}; 925 926static const struct pci_device_id vt8231_pci_ids[] = { 927 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) }, 928 { 0, } 929}; 930 931MODULE_DEVICE_TABLE(pci, vt8231_pci_ids); 932 933static int vt8231_device_add(unsigned short address) 934{ 935 struct resource res = { 936 .start = address, 937 .end = address + VT8231_EXTENT - 1, 938 .name = DRIVER_NAME, 939 .flags = IORESOURCE_IO, 940 }; 941 int err; 942 943 err = acpi_check_resource_conflict(&res); 944 if (err) 945 goto exit; 946 947 pdev = platform_device_alloc(DRIVER_NAME, address); 948 if (!pdev) { 949 err = -ENOMEM; 950 pr_err("Device allocation failed\n"); 951 goto exit; 952 } 953 954 err = platform_device_add_resources(pdev, &res, 1); 955 if (err) { 956 pr_err("Device resource addition failed (%d)\n", err); 957 goto exit_device_put; 958 } 959 960 err = platform_device_add(pdev); 961 if (err) { 962 pr_err("Device addition failed (%d)\n", err); 963 goto exit_device_put; 964 } 965 966 return 0; 967 968exit_device_put: 969 platform_device_put(pdev); 970exit: 971 return err; 972} 973 974static int vt8231_pci_probe(struct pci_dev *dev, 975 const struct pci_device_id *id) 976{ 977 u16 address, val; 978 int ret; 979 980 if (force_addr) { 981 address = force_addr & 0xff00; 982 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", 983 address); 984 985 ret = pci_write_config_word(dev, VT8231_BASE_REG, address | 1); 986 if (ret != PCIBIOS_SUCCESSFUL) 987 return -ENODEV; 988 } 989 990 pci_read_config_word(dev, VT8231_BASE_REG, &val); 991 if (val == (u16)~0) 992 return -ENODEV; 993 994 address = val & ~(VT8231_EXTENT - 1); 995 if (address == 0) { 996 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n"); 997 return -ENODEV; 998 } 999 1000 pci_read_config_word(dev, VT8231_ENABLE_REG, &val); 1001 if (val == (u16)~0) 1002 return -ENODEV; 1003 1004 if (!(val & 0x0001)) { 1005 dev_warn(&dev->dev, "enabling sensors\n"); 1006 ret = pci_write_config_word(dev, VT8231_ENABLE_REG, val | 0x1); 1007 if (ret != PCIBIOS_SUCCESSFUL) 1008 return -ENODEV; 1009 } 1010 1011 if (platform_driver_register(&vt8231_driver)) 1012 goto exit; 1013 1014 /* Sets global pdev as a side effect */ 1015 if (vt8231_device_add(address)) 1016 goto exit_unregister; 1017 1018 /* 1019 * Always return failure here. This is to allow other drivers to bind 1020 * to this pci device. We don't really want to have control over the 1021 * pci device, we only wanted to read as few register values from it. 1022 */ 1023 1024 /* 1025 * We do, however, mark ourselves as using the PCI device to stop it 1026 * getting unloaded. 1027 */ 1028 s_bridge = pci_dev_get(dev); 1029 return -ENODEV; 1030 1031exit_unregister: 1032 platform_driver_unregister(&vt8231_driver); 1033exit: 1034 return -ENODEV; 1035} 1036 1037static struct pci_driver vt8231_pci_driver = { 1038 .name = DRIVER_NAME, 1039 .id_table = vt8231_pci_ids, 1040 .probe = vt8231_pci_probe, 1041}; 1042 1043static int __init sm_vt8231_init(void) 1044{ 1045 return pci_register_driver(&vt8231_pci_driver); 1046} 1047 1048static 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 1059MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>"); 1060MODULE_DESCRIPTION("VT8231 sensors"); 1061MODULE_LICENSE("GPL"); 1062 1063module_init(sm_vt8231_init); 1064module_exit(sm_vt8231_exit);
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