1/* 2 vt8231.c - Part of lm_sensors, Linux kernel modules 3 for hardware monitoring 4 5 Copyright (c) 2005 Roger Lucas <vt8231@hiddenengine.co.uk> 6 Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com> 7 Aaron M. Marsh <amarsh@sdf.lonestar.org> 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22*/ 23 24/* Supports VIA VT8231 South Bridge embedded sensors 25*/ 26 27#include <linux/module.h> 28#include <linux/init.h> 29#include <linux/slab.h> 30#include <linux/pci.h> 31#include <linux/jiffies.h> 32#include <linux/platform_device.h> 33#include <linux/hwmon.h> 34#include <linux/hwmon-sysfs.h> 35#include <linux/hwmon-vid.h> 36#include <linux/err.h> 37#include <linux/mutex.h> 38#include <linux/acpi.h> 39#include <linux/io.h> 40 41static int force_addr; 42module_param(force_addr, int, 0); 43MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors"); 44 45static struct platform_device *pdev; 46 47#define VT8231_EXTENT 0x80 48#define VT8231_BASE_REG 0x70 49#define VT8231_ENABLE_REG 0x74 50 51/* The VT8231 registers 52 53 The reset value for the input channel configuration is used (Reg 0x4A=0x07) 54 which sets the selected inputs marked with '*' below if multiple options are 55 possible: 56 57 Voltage Mode Temperature Mode 58 Sensor Linux Id Linux Id VIA Id 59 -------- -------- -------- ------ 60 CPU Diode N/A temp1 0 61 UIC1 in0 temp2 * 1 62 UIC2 in1 * temp3 2 63 UIC3 in2 * temp4 3 64 UIC4 in3 * temp5 4 65 UIC5 in4 * temp6 5 66 3.3V in5 N/A 67 68 Note that the BIOS may set the configuration register to a different value 69 to match the motherboard configuration. 70*/ 71 72/* fans numbered 0-1 */ 73#define VT8231_REG_FAN_MIN(nr) (0x3b + (nr)) 74#define VT8231_REG_FAN(nr) (0x29 + (nr)) 75 76/* Voltage inputs numbered 0-5 */ 77 78static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 }; 79static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 }; 80static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 }; 81 82/* Temperatures are numbered 1-6 according to the Linux kernel specification. 83** 84** In the VIA datasheet, however, the temperatures are numbered from zero. 85** Since it is important that this driver can easily be compared to the VIA 86** datasheet, we will use the VIA numbering within this driver and map the 87** kernel sysfs device name to the VIA number in the sysfs callback. 88*/ 89 90#define VT8231_REG_TEMP_LOW01 0x49 91#define VT8231_REG_TEMP_LOW25 0x4d 92 93static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 }; 94static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 }; 95static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 }; 96 97#define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210) 98#define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210) 99#define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200) 100 101#define VT8231_REG_CONFIG 0x40 102#define VT8231_REG_ALARM1 0x41 103#define VT8231_REG_ALARM2 0x42 104#define VT8231_REG_FANDIV 0x47 105#define VT8231_REG_UCH_CONFIG 0x4a 106#define VT8231_REG_TEMP1_CONFIG 0x4b 107#define VT8231_REG_TEMP2_CONFIG 0x4c 108 109/* temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux 110** numbering 111*/ 112#define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \ 113 ((ch_config) >> ((i)+1)) & 0x01) 114/* voltages 0-5 */ 115#define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \ 116 !(((ch_config) >> ((i)+2)) & 0x01)) 117 118#define DIV_FROM_REG(val) (1 << (val)) 119 120/* NB The values returned here are NOT temperatures. The calibration curves 121** for the thermistor curves are board-specific and must go in the 122** sensors.conf file. Temperature sensors are actually ten bits, but the 123** VIA datasheet only considers the 8 MSBs obtained from the regtemp[] 124** register. The temperature value returned should have a magnitude of 3, 125** so we use the VIA scaling as the "true" scaling and use the remaining 2 126** LSBs as fractional precision. 127** 128** All the on-chip hardware temperature comparisons for the alarms are only 129** 8-bits wide, and compare against the 8 MSBs of the temperature. The bits 130** in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are 131** ignored. 132*/ 133 134/******** FAN RPM CONVERSIONS ******** 135** This chip saturates back at 0, not at 255 like many the other chips. 136** So, 0 means 0 RPM 137*/ 138static inline u8 FAN_TO_REG(long rpm, int div) 139{ 140 if (rpm == 0) 141 return 0; 142 return SENSORS_LIMIT(1310720 / (rpm * div), 1, 255); 143} 144 145#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div))) 146 147struct vt8231_data { 148 unsigned short addr; 149 const char *name; 150 151 struct mutex update_lock; 152 struct device *hwmon_dev; 153 char valid; /* !=0 if following fields are valid */ 154 unsigned long last_updated; /* In jiffies */ 155 156 u8 in[6]; /* Register value */ 157 u8 in_max[6]; /* Register value */ 158 u8 in_min[6]; /* Register value */ 159 u16 temp[6]; /* Register value 10 bit, right aligned */ 160 u8 temp_max[6]; /* Register value */ 161 u8 temp_min[6]; /* Register value */ 162 u8 fan[2]; /* Register value */ 163 u8 fan_min[2]; /* Register value */ 164 u8 fan_div[2]; /* Register encoding, shifted right */ 165 u16 alarms; /* Register encoding */ 166 u8 uch_config; 167}; 168 169static struct pci_dev *s_bridge; 170static int vt8231_probe(struct platform_device *pdev); 171static int __devexit vt8231_remove(struct platform_device *pdev); 172static struct vt8231_data *vt8231_update_device(struct device *dev); 173static void vt8231_init_device(struct vt8231_data *data); 174 175static inline int vt8231_read_value(struct vt8231_data *data, u8 reg) 176{ 177 return inb_p(data->addr + reg); 178} 179 180static inline void vt8231_write_value(struct vt8231_data *data, u8 reg, 181 u8 value) 182{ 183 outb_p(value, data->addr + reg); 184} 185 186/* following are the sysfs callback functions */ 187static ssize_t show_in(struct device *dev, struct device_attribute *attr, 188 char *buf) 189{ 190 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 191 int nr = sensor_attr->index; 192 struct vt8231_data *data = vt8231_update_device(dev); 193 194 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958); 195} 196 197static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 198 char *buf) 199{ 200 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 201 int nr = sensor_attr->index; 202 struct vt8231_data *data = vt8231_update_device(dev); 203 204 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958); 205} 206 207static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 208 char *buf) 209{ 210 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 211 int nr = sensor_attr->index; 212 struct vt8231_data *data = vt8231_update_device(dev); 213 214 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958)); 215} 216 217static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 218 const char *buf, size_t count) 219{ 220 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 221 int nr = sensor_attr->index; 222 struct vt8231_data *data = dev_get_drvdata(dev); 223 unsigned long val = simple_strtoul(buf, NULL, 10); 224 225 mutex_lock(&data->update_lock); 226 data->in_min[nr] = SENSORS_LIMIT(((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 232static ssize_t set_in_max(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 = simple_strtoul(buf, NULL, 10); 239 240 mutex_lock(&data->update_lock); 241 data->in_max[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255); 242 vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]); 243 mutex_unlock(&data->update_lock); 244 return count; 245} 246 247/* Special case for input 5 as this has 3.3V scaling built into the chip */ 248static ssize_t show_in5(struct device *dev, struct device_attribute *attr, 249 char *buf) 250{ 251 struct vt8231_data *data = vt8231_update_device(dev); 252 253 return sprintf(buf, "%d\n", 254 (((data->in[5] - 3) * 10000 * 54) / (958 * 34))); 255} 256 257static ssize_t show_in5_min(struct device *dev, struct device_attribute *attr, 258 char *buf) 259{ 260 struct vt8231_data *data = vt8231_update_device(dev); 261 262 return sprintf(buf, "%d\n", 263 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34))); 264} 265 266static ssize_t show_in5_max(struct device *dev, struct device_attribute *attr, 267 char *buf) 268{ 269 struct vt8231_data *data = vt8231_update_device(dev); 270 271 return sprintf(buf, "%d\n", 272 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34))); 273} 274 275static ssize_t set_in5_min(struct device *dev, struct device_attribute *attr, 276 const char *buf, size_t count) 277{ 278 struct vt8231_data *data = dev_get_drvdata(dev); 279 unsigned long val = simple_strtoul(buf, NULL, 10); 280 281 mutex_lock(&data->update_lock); 282 data->in_min[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3, 283 0, 255); 284 vt8231_write_value(data, regvoltmin[5], data->in_min[5]); 285 mutex_unlock(&data->update_lock); 286 return count; 287} 288 289static ssize_t set_in5_max(struct device *dev, struct device_attribute *attr, 290 const char *buf, size_t count) 291{ 292 struct vt8231_data *data = dev_get_drvdata(dev); 293 unsigned long val = simple_strtoul(buf, NULL, 10); 294 295 mutex_lock(&data->update_lock); 296 data->in_max[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3, 297 0, 255); 298 vt8231_write_value(data, regvoltmax[5], data->in_max[5]); 299 mutex_unlock(&data->update_lock); 300 return count; 301} 302 303#define define_voltage_sysfs(offset) \ 304static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 305 show_in, NULL, offset); \ 306static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 307 show_in_min, set_in_min, offset); \ 308static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 309 show_in_max, set_in_max, offset) 310 311define_voltage_sysfs(0); 312define_voltage_sysfs(1); 313define_voltage_sysfs(2); 314define_voltage_sysfs(3); 315define_voltage_sysfs(4); 316 317static DEVICE_ATTR(in5_input, S_IRUGO, show_in5, NULL); 318static DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR, show_in5_min, set_in5_min); 319static DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR, show_in5_max, set_in5_max); 320 321/* Temperatures */ 322static ssize_t show_temp0(struct device *dev, struct device_attribute *attr, 323 char *buf) 324{ 325 struct vt8231_data *data = vt8231_update_device(dev); 326 return sprintf(buf, "%d\n", data->temp[0] * 250); 327} 328 329static ssize_t show_temp0_max(struct device *dev, struct device_attribute *attr, 330 char *buf) 331{ 332 struct vt8231_data *data = vt8231_update_device(dev); 333 return sprintf(buf, "%d\n", data->temp_max[0] * 1000); 334} 335 336static ssize_t show_temp0_min(struct device *dev, struct device_attribute *attr, 337 char *buf) 338{ 339 struct vt8231_data *data = vt8231_update_device(dev); 340 return sprintf(buf, "%d\n", data->temp_min[0] * 1000); 341} 342 343static ssize_t set_temp0_max(struct device *dev, struct device_attribute *attr, 344 const char *buf, size_t count) 345{ 346 struct vt8231_data *data = dev_get_drvdata(dev); 347 int val = simple_strtol(buf, NULL, 10); 348 349 mutex_lock(&data->update_lock); 350 data->temp_max[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255); 351 vt8231_write_value(data, regtempmax[0], data->temp_max[0]); 352 mutex_unlock(&data->update_lock); 353 return count; 354} 355static ssize_t set_temp0_min(struct device *dev, struct device_attribute *attr, 356 const char *buf, size_t count) 357{ 358 struct vt8231_data *data = dev_get_drvdata(dev); 359 int val = simple_strtol(buf, NULL, 10); 360 361 mutex_lock(&data->update_lock); 362 data->temp_min[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255); 363 vt8231_write_value(data, regtempmin[0], data->temp_min[0]); 364 mutex_unlock(&data->update_lock); 365 return count; 366} 367 368static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 369 char *buf) 370{ 371 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 372 int nr = sensor_attr->index; 373 struct vt8231_data *data = vt8231_update_device(dev); 374 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 375} 376 377static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 378 char *buf) 379{ 380 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 381 int nr = sensor_attr->index; 382 struct vt8231_data *data = vt8231_update_device(dev); 383 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr])); 384} 385 386static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 387 char *buf) 388{ 389 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 390 int nr = sensor_attr->index; 391 struct vt8231_data *data = vt8231_update_device(dev); 392 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr])); 393} 394 395static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 396 const char *buf, size_t count) 397{ 398 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 399 int nr = sensor_attr->index; 400 struct vt8231_data *data = dev_get_drvdata(dev); 401 int val = simple_strtol(buf, NULL, 10); 402 403 mutex_lock(&data->update_lock); 404 data->temp_max[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255); 405 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]); 406 mutex_unlock(&data->update_lock); 407 return count; 408} 409static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 410 const char *buf, size_t count) 411{ 412 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 413 int nr = sensor_attr->index; 414 struct vt8231_data *data = dev_get_drvdata(dev); 415 int val = simple_strtol(buf, NULL, 10); 416 417 mutex_lock(&data->update_lock); 418 data->temp_min[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255); 419 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]); 420 mutex_unlock(&data->update_lock); 421 return count; 422} 423 424/* Note that these map the Linux temperature sensor numbering (1-6) to the VIA 425** temperature sensor numbering (0-5) 426*/ 427#define define_temperature_sysfs(offset) \ 428static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 429 show_temp, NULL, offset - 1); \ 430static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 431 show_temp_max, set_temp_max, offset - 1); \ 432static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ 433 show_temp_min, set_temp_min, offset - 1) 434 435static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp0, NULL); 436static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp0_max, set_temp0_max); 437static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, show_temp0_min, set_temp0_min); 438 439define_temperature_sysfs(2); 440define_temperature_sysfs(3); 441define_temperature_sysfs(4); 442define_temperature_sysfs(5); 443define_temperature_sysfs(6); 444 445/* Fans */ 446static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 447 char *buf) 448{ 449 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 450 int nr = sensor_attr->index; 451 struct vt8231_data *data = vt8231_update_device(dev); 452 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 453 DIV_FROM_REG(data->fan_div[nr]))); 454} 455 456static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 457 char *buf) 458{ 459 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 460 int nr = sensor_attr->index; 461 struct vt8231_data *data = vt8231_update_device(dev); 462 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 463 DIV_FROM_REG(data->fan_div[nr]))); 464} 465 466static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 467 char *buf) 468{ 469 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 470 int nr = sensor_attr->index; 471 struct vt8231_data *data = vt8231_update_device(dev); 472 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 473} 474 475static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 476 const char *buf, size_t count) 477{ 478 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 479 int nr = sensor_attr->index; 480 struct vt8231_data *data = dev_get_drvdata(dev); 481 int val = simple_strtoul(buf, NULL, 10); 482 483 mutex_lock(&data->update_lock); 484 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 485 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 486 mutex_unlock(&data->update_lock); 487 return count; 488} 489 490static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 491 const char *buf, size_t count) 492{ 493 struct vt8231_data *data = dev_get_drvdata(dev); 494 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 495 unsigned long val = simple_strtoul(buf, NULL, 10); 496 int nr = sensor_attr->index; 497 int old = vt8231_read_value(data, VT8231_REG_FANDIV); 498 long min = FAN_FROM_REG(data->fan_min[nr], 499 DIV_FROM_REG(data->fan_div[nr])); 500 501 mutex_lock(&data->update_lock); 502 switch (val) { 503 case 1: data->fan_div[nr] = 0; break; 504 case 2: data->fan_div[nr] = 1; break; 505 case 4: data->fan_div[nr] = 2; break; 506 case 8: data->fan_div[nr] = 3; break; 507 default: 508 dev_err(dev, "fan_div value %ld not supported. " 509 "Choose one of 1, 2, 4 or 8!\n", val); 510 mutex_unlock(&data->update_lock); 511 return -EINVAL; 512 } 513 514 /* Correct the fan minimum speed */ 515 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 516 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 517 518 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); 519 vt8231_write_value(data, VT8231_REG_FANDIV, old); 520 mutex_unlock(&data->update_lock); 521 return count; 522} 523 524 525#define define_fan_sysfs(offset) \ 526static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 527 show_fan, NULL, offset - 1); \ 528static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 529 show_fan_div, set_fan_div, offset - 1); \ 530static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 531 show_fan_min, set_fan_min, offset - 1) 532 533define_fan_sysfs(1); 534define_fan_sysfs(2); 535 536/* Alarms */ 537static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 538 char *buf) 539{ 540 struct vt8231_data *data = vt8231_update_device(dev); 541 return sprintf(buf, "%d\n", data->alarms); 542} 543static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 544 545static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 546 char *buf) 547{ 548 int bitnr = to_sensor_dev_attr(attr)->index; 549 struct vt8231_data *data = vt8231_update_device(dev); 550 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 551} 552static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 553static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11); 554static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0); 555static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1); 556static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 3); 557static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 8); 558static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 11); 559static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0); 560static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 1); 561static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 562static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 563static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 2); 564static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 565static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 566 567static ssize_t show_name(struct device *dev, struct device_attribute 568 *devattr, char *buf) 569{ 570 struct vt8231_data *data = dev_get_drvdata(dev); 571 return sprintf(buf, "%s\n", data->name); 572} 573static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 574 575static struct attribute *vt8231_attributes_temps[6][5] = { 576 { 577 &dev_attr_temp1_input.attr, 578 &dev_attr_temp1_max_hyst.attr, 579 &dev_attr_temp1_max.attr, 580 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 581 NULL 582 }, { 583 &sensor_dev_attr_temp2_input.dev_attr.attr, 584 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 585 &sensor_dev_attr_temp2_max.dev_attr.attr, 586 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 587 NULL 588 }, { 589 &sensor_dev_attr_temp3_input.dev_attr.attr, 590 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, 591 &sensor_dev_attr_temp3_max.dev_attr.attr, 592 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 593 NULL 594 }, { 595 &sensor_dev_attr_temp4_input.dev_attr.attr, 596 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, 597 &sensor_dev_attr_temp4_max.dev_attr.attr, 598 &sensor_dev_attr_temp4_alarm.dev_attr.attr, 599 NULL 600 }, { 601 &sensor_dev_attr_temp5_input.dev_attr.attr, 602 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, 603 &sensor_dev_attr_temp5_max.dev_attr.attr, 604 &sensor_dev_attr_temp5_alarm.dev_attr.attr, 605 NULL 606 }, { 607 &sensor_dev_attr_temp6_input.dev_attr.attr, 608 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr, 609 &sensor_dev_attr_temp6_max.dev_attr.attr, 610 &sensor_dev_attr_temp6_alarm.dev_attr.attr, 611 NULL 612 } 613}; 614 615static const struct attribute_group vt8231_group_temps[6] = { 616 { .attrs = vt8231_attributes_temps[0] }, 617 { .attrs = vt8231_attributes_temps[1] }, 618 { .attrs = vt8231_attributes_temps[2] }, 619 { .attrs = vt8231_attributes_temps[3] }, 620 { .attrs = vt8231_attributes_temps[4] }, 621 { .attrs = vt8231_attributes_temps[5] }, 622}; 623 624static struct attribute *vt8231_attributes_volts[6][5] = { 625 { 626 &sensor_dev_attr_in0_input.dev_attr.attr, 627 &sensor_dev_attr_in0_min.dev_attr.attr, 628 &sensor_dev_attr_in0_max.dev_attr.attr, 629 &sensor_dev_attr_in0_alarm.dev_attr.attr, 630 NULL 631 }, { 632 &sensor_dev_attr_in1_input.dev_attr.attr, 633 &sensor_dev_attr_in1_min.dev_attr.attr, 634 &sensor_dev_attr_in1_max.dev_attr.attr, 635 &sensor_dev_attr_in1_alarm.dev_attr.attr, 636 NULL 637 }, { 638 &sensor_dev_attr_in2_input.dev_attr.attr, 639 &sensor_dev_attr_in2_min.dev_attr.attr, 640 &sensor_dev_attr_in2_max.dev_attr.attr, 641 &sensor_dev_attr_in2_alarm.dev_attr.attr, 642 NULL 643 }, { 644 &sensor_dev_attr_in3_input.dev_attr.attr, 645 &sensor_dev_attr_in3_min.dev_attr.attr, 646 &sensor_dev_attr_in3_max.dev_attr.attr, 647 &sensor_dev_attr_in3_alarm.dev_attr.attr, 648 NULL 649 }, { 650 &sensor_dev_attr_in4_input.dev_attr.attr, 651 &sensor_dev_attr_in4_min.dev_attr.attr, 652 &sensor_dev_attr_in4_max.dev_attr.attr, 653 &sensor_dev_attr_in4_alarm.dev_attr.attr, 654 NULL 655 }, { 656 &dev_attr_in5_input.attr, 657 &dev_attr_in5_min.attr, 658 &dev_attr_in5_max.attr, 659 &sensor_dev_attr_in5_alarm.dev_attr.attr, 660 NULL 661 } 662}; 663 664static const struct attribute_group vt8231_group_volts[6] = { 665 { .attrs = vt8231_attributes_volts[0] }, 666 { .attrs = vt8231_attributes_volts[1] }, 667 { .attrs = vt8231_attributes_volts[2] }, 668 { .attrs = vt8231_attributes_volts[3] }, 669 { .attrs = vt8231_attributes_volts[4] }, 670 { .attrs = vt8231_attributes_volts[5] }, 671}; 672 673static struct attribute *vt8231_attributes[] = { 674 &sensor_dev_attr_fan1_input.dev_attr.attr, 675 &sensor_dev_attr_fan2_input.dev_attr.attr, 676 &sensor_dev_attr_fan1_min.dev_attr.attr, 677 &sensor_dev_attr_fan2_min.dev_attr.attr, 678 &sensor_dev_attr_fan1_div.dev_attr.attr, 679 &sensor_dev_attr_fan2_div.dev_attr.attr, 680 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 681 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 682 &dev_attr_alarms.attr, 683 &dev_attr_name.attr, 684 NULL 685}; 686 687static const struct attribute_group vt8231_group = { 688 .attrs = vt8231_attributes, 689}; 690 691static struct platform_driver vt8231_driver = { 692 .driver = { 693 .owner = THIS_MODULE, 694 .name = "vt8231", 695 }, 696 .probe = vt8231_probe, 697 .remove = __devexit_p(vt8231_remove), 698}; 699 700static const struct pci_device_id vt8231_pci_ids[] = { 701 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) }, 702 { 0, } 703}; 704 705MODULE_DEVICE_TABLE(pci, vt8231_pci_ids); 706 707static int __devinit vt8231_pci_probe(struct pci_dev *dev, 708 const struct pci_device_id *id); 709 710static struct pci_driver vt8231_pci_driver = { 711 .name = "vt8231", 712 .id_table = vt8231_pci_ids, 713 .probe = vt8231_pci_probe, 714}; 715 716static int vt8231_probe(struct platform_device *pdev) 717{ 718 struct resource *res; 719 struct vt8231_data *data; 720 int err = 0, i; 721 722 /* Reserve the ISA region */ 723 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 724 if (!request_region(res->start, VT8231_EXTENT, 725 vt8231_driver.driver.name)) { 726 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n", 727 (unsigned long)res->start, (unsigned long)res->end); 728 return -ENODEV; 729 } 730 731 if (!(data = kzalloc(sizeof(struct vt8231_data), GFP_KERNEL))) { 732 err = -ENOMEM; 733 goto exit_release; 734 } 735 736 platform_set_drvdata(pdev, data); 737 data->addr = res->start; 738 data->name = "vt8231"; 739 740 mutex_init(&data->update_lock); 741 vt8231_init_device(data); 742 743 /* Register sysfs hooks */ 744 if ((err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group))) 745 goto exit_free; 746 747 /* Must update device information to find out the config field */ 748 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG); 749 750 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) { 751 if (ISTEMP(i, data->uch_config)) { 752 if ((err = sysfs_create_group(&pdev->dev.kobj, 753 &vt8231_group_temps[i]))) 754 goto exit_remove_files; 755 } 756 } 757 758 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) { 759 if (ISVOLT(i, data->uch_config)) { 760 if ((err = sysfs_create_group(&pdev->dev.kobj, 761 &vt8231_group_volts[i]))) 762 goto exit_remove_files; 763 } 764 } 765 766 data->hwmon_dev = hwmon_device_register(&pdev->dev); 767 if (IS_ERR(data->hwmon_dev)) { 768 err = PTR_ERR(data->hwmon_dev); 769 goto exit_remove_files; 770 } 771 return 0; 772 773exit_remove_files: 774 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 775 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 776 777 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 778 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 779 780 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 781 782exit_free: 783 platform_set_drvdata(pdev, NULL); 784 kfree(data); 785 786exit_release: 787 release_region(res->start, VT8231_EXTENT); 788 return err; 789} 790 791static int __devexit vt8231_remove(struct platform_device *pdev) 792{ 793 struct vt8231_data *data = platform_get_drvdata(pdev); 794 int i; 795 796 hwmon_device_unregister(data->hwmon_dev); 797 798 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 799 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 800 801 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 802 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 803 804 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 805 806 release_region(data->addr, VT8231_EXTENT); 807 platform_set_drvdata(pdev, NULL); 808 kfree(data); 809 return 0; 810} 811 812static void vt8231_init_device(struct vt8231_data *data) 813{ 814 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0); 815 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0); 816} 817 818static struct vt8231_data *vt8231_update_device(struct device *dev) 819{ 820 struct vt8231_data *data = dev_get_drvdata(dev); 821 int i; 822 u16 low; 823 824 mutex_lock(&data->update_lock); 825 826 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 827 || !data->valid) { 828 for (i = 0; i < 6; i++) { 829 if (ISVOLT(i, data->uch_config)) { 830 data->in[i] = vt8231_read_value(data, 831 regvolt[i]); 832 data->in_min[i] = vt8231_read_value(data, 833 regvoltmin[i]); 834 data->in_max[i] = vt8231_read_value(data, 835 regvoltmax[i]); 836 } 837 } 838 for (i = 0; i < 2; i++) { 839 data->fan[i] = vt8231_read_value(data, 840 VT8231_REG_FAN(i)); 841 data->fan_min[i] = vt8231_read_value(data, 842 VT8231_REG_FAN_MIN(i)); 843 } 844 845 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01); 846 low = (low >> 6) | ((low & 0x30) >> 2) 847 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4); 848 for (i = 0; i < 6; i++) { 849 if (ISTEMP(i, data->uch_config)) { 850 data->temp[i] = (vt8231_read_value(data, 851 regtemp[i]) << 2) 852 | ((low >> (2 * i)) & 0x03); 853 data->temp_max[i] = vt8231_read_value(data, 854 regtempmax[i]); 855 data->temp_min[i] = vt8231_read_value(data, 856 regtempmin[i]); 857 } 858 } 859 860 i = vt8231_read_value(data, VT8231_REG_FANDIV); 861 data->fan_div[0] = (i >> 4) & 0x03; 862 data->fan_div[1] = i >> 6; 863 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) | 864 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8); 865 866 /* Set alarm flags correctly */ 867 if (!data->fan[0] && data->fan_min[0]) { 868 data->alarms |= 0x40; 869 } else if (data->fan[0] && !data->fan_min[0]) { 870 data->alarms &= ~0x40; 871 } 872 873 if (!data->fan[1] && data->fan_min[1]) { 874 data->alarms |= 0x80; 875 } else if (data->fan[1] && !data->fan_min[1]) { 876 data->alarms &= ~0x80; 877 } 878 879 data->last_updated = jiffies; 880 data->valid = 1; 881 } 882 883 mutex_unlock(&data->update_lock); 884 885 return data; 886} 887 888static int __devinit vt8231_device_add(unsigned short address) 889{ 890 struct resource res = { 891 .start = address, 892 .end = address + VT8231_EXTENT - 1, 893 .name = "vt8231", 894 .flags = IORESOURCE_IO, 895 }; 896 int err; 897 898 err = acpi_check_resource_conflict(&res); 899 if (err) 900 goto exit; 901 902 pdev = platform_device_alloc("vt8231", address); 903 if (!pdev) { 904 err = -ENOMEM; 905 printk(KERN_ERR "vt8231: Device allocation failed\n"); 906 goto exit; 907 } 908 909 err = platform_device_add_resources(pdev, &res, 1); 910 if (err) { 911 printk(KERN_ERR "vt8231: Device resource addition failed " 912 "(%d)\n", err); 913 goto exit_device_put; 914 } 915 916 err = platform_device_add(pdev); 917 if (err) { 918 printk(KERN_ERR "vt8231: Device addition failed (%d)\n", 919 err); 920 goto exit_device_put; 921 } 922 923 return 0; 924 925exit_device_put: 926 platform_device_put(pdev); 927exit: 928 return err; 929} 930 931static int __devinit vt8231_pci_probe(struct pci_dev *dev, 932 const struct pci_device_id *id) 933{ 934 u16 address, val; 935 if (force_addr) { 936 address = force_addr & 0xff00; 937 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", 938 address); 939 940 if (PCIBIOS_SUCCESSFUL != 941 pci_write_config_word(dev, VT8231_BASE_REG, address | 1)) 942 return -ENODEV; 943 } 944 945 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG, 946 &val)) 947 return -ENODEV; 948 949 address = val & ~(VT8231_EXTENT - 1); 950 if (address == 0) { 951 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n"); 952 return -ENODEV; 953 } 954 955 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG, 956 &val)) 957 return -ENODEV; 958 959 if (!(val & 0x0001)) { 960 dev_warn(&dev->dev, "enabling sensors\n"); 961 if (PCIBIOS_SUCCESSFUL != 962 pci_write_config_word(dev, VT8231_ENABLE_REG, 963 val | 0x0001)) 964 return -ENODEV; 965 } 966 967 if (platform_driver_register(&vt8231_driver)) 968 goto exit; 969 970 /* Sets global pdev as a side effect */ 971 if (vt8231_device_add(address)) 972 goto exit_unregister; 973 974 /* Always return failure here. This is to allow other drivers to bind 975 * to this pci device. We don't really want to have control over the 976 * pci device, we only wanted to read as few register values from it. 977 */ 978 979 /* We do, however, mark ourselves as using the PCI device to stop it 980 getting unloaded. */ 981 s_bridge = pci_dev_get(dev); 982 return -ENODEV; 983 984exit_unregister: 985 platform_driver_unregister(&vt8231_driver); 986exit: 987 return -ENODEV; 988} 989 990static int __init sm_vt8231_init(void) 991{ 992 return pci_register_driver(&vt8231_pci_driver); 993} 994 995static void __exit sm_vt8231_exit(void) 996{ 997 pci_unregister_driver(&vt8231_pci_driver); 998 if (s_bridge != NULL) { 999 platform_device_unregister(pdev); 1000 platform_driver_unregister(&vt8231_driver); 1001 pci_dev_put(s_bridge); 1002 s_bridge = NULL; 1003 } 1004} 1005 1006MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>"); 1007MODULE_DESCRIPTION("VT8231 sensors"); 1008MODULE_LICENSE("GPL"); 1009 1010module_init(sm_vt8231_init); 1011module_exit(sm_vt8231_exit); 1012