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 <asm/io.h> 39 40 static int force_addr; 41 module_param(force_addr, int, 0); 42 MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors"); 43 44 static struct platform_device *pdev; 45 46 #define VT8231_EXTENT 0x80 47 #define VT8231_BASE_REG 0x70 48 #define VT8231_ENABLE_REG 0x74 49 50 /* The VT8231 registers 51 52 The reset value for the input channel configuration is used (Reg 0x4A=0x07) 53 which sets the selected inputs marked with '*' below if multiple options are 54 possible: 55 56 Voltage Mode Temperature Mode 57 Sensor Linux Id Linux Id VIA Id 58 -------- -------- -------- ------ 59 CPU Diode N/A temp1 0 60 UIC1 in0 temp2 * 1 61 UIC2 in1 * temp3 2 62 UIC3 in2 * temp4 3 63 UIC4 in3 * temp5 4 64 UIC5 in4 * temp6 5 65 3.3V in5 N/A 66 67 Note that the BIOS may set the configuration register to a different value 68 to match the motherboard configuration. 69 */ 70 71 /* fans numbered 0-1 */ 72 #define VT8231_REG_FAN_MIN(nr) (0x3b + (nr)) 73 #define VT8231_REG_FAN(nr) (0x29 + (nr)) 74 75 /* Voltage inputs numbered 0-5 */ 76 77 static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 }; 78 static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 }; 79 static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 }; 80 81 /* Temperatures are numbered 1-6 according to the Linux kernel specification. 82 ** 83 ** In the VIA datasheet, however, the temperatures are numbered from zero. 84 ** Since it is important that this driver can easily be compared to the VIA 85 ** datasheet, we will use the VIA numbering within this driver and map the 86 ** kernel sysfs device name to the VIA number in the sysfs callback. 87 */ 88 89 #define VT8231_REG_TEMP_LOW01 0x49 90 #define VT8231_REG_TEMP_LOW25 0x4d 91 92 static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 }; 93 static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 }; 94 static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 }; 95 96 #define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210) 97 #define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210) 98 #define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200) 99 100 #define VT8231_REG_CONFIG 0x40 101 #define VT8231_REG_ALARM1 0x41 102 #define VT8231_REG_ALARM2 0x42 103 #define VT8231_REG_FANDIV 0x47 104 #define VT8231_REG_UCH_CONFIG 0x4a 105 #define VT8231_REG_TEMP1_CONFIG 0x4b 106 #define VT8231_REG_TEMP2_CONFIG 0x4c 107 108 /* temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux 109 ** numbering 110 */ 111 #define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \ 112 ((ch_config) >> ((i)+1)) & 0x01) 113 /* voltages 0-5 */ 114 #define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \ 115 !(((ch_config) >> ((i)+2)) & 0x01)) 116 117 #define DIV_FROM_REG(val) (1 << (val)) 118 119 /* NB The values returned here are NOT temperatures. The calibration curves 120 ** for the thermistor curves are board-specific and must go in the 121 ** sensors.conf file. Temperature sensors are actually ten bits, but the 122 ** VIA datasheet only considers the 8 MSBs obtained from the regtemp[] 123 ** register. The temperature value returned should have a magnitude of 3, 124 ** so we use the VIA scaling as the "true" scaling and use the remaining 2 125 ** LSBs as fractional precision. 126 ** 127 ** All the on-chip hardware temperature comparisons for the alarms are only 128 ** 8-bits wide, and compare against the 8 MSBs of the temperature. The bits 129 ** in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are 130 ** ignored. 131 */ 132 133 /******** FAN RPM CONVERSIONS ******** 134 ** This chip saturates back at 0, not at 255 like many the other chips. 135 ** So, 0 means 0 RPM 136 */ 137 static inline u8 FAN_TO_REG(long rpm, int div) 138 { 139 if (rpm == 0) 140 return 0; 141 return SENSORS_LIMIT(1310720 / (rpm * div), 1, 255); 142 } 143 144 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div))) 145 146 struct vt8231_data { 147 unsigned short addr; 148 const char *name; 149 150 struct mutex update_lock; 151 struct device *hwmon_dev; 152 char valid; /* !=0 if following fields are valid */ 153 unsigned long last_updated; /* In jiffies */ 154 155 u8 in[6]; /* Register value */ 156 u8 in_max[6]; /* Register value */ 157 u8 in_min[6]; /* Register value */ 158 u16 temp[6]; /* Register value 10 bit, right aligned */ 159 u8 temp_max[6]; /* Register value */ 160 u8 temp_min[6]; /* Register value */ 161 u8 fan[2]; /* Register value */ 162 u8 fan_min[2]; /* Register value */ 163 u8 fan_div[2]; /* Register encoding, shifted right */ 164 u16 alarms; /* Register encoding */ 165 u8 uch_config; 166 }; 167 168 static struct pci_dev *s_bridge; 169 static int vt8231_probe(struct platform_device *pdev); 170 static int __devexit vt8231_remove(struct platform_device *pdev); 171 static struct vt8231_data *vt8231_update_device(struct device *dev); 172 static void vt8231_init_device(struct vt8231_data *data); 173 174 static inline int vt8231_read_value(struct vt8231_data *data, u8 reg) 175 { 176 return inb_p(data->addr + reg); 177 } 178 179 static inline void vt8231_write_value(struct vt8231_data *data, u8 reg, 180 u8 value) 181 { 182 outb_p(value, data->addr + reg); 183 } 184 185 /* following are the sysfs callback functions */ 186 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 187 char *buf) 188 { 189 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 190 int nr = sensor_attr->index; 191 struct vt8231_data *data = vt8231_update_device(dev); 192 193 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958); 194 } 195 196 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 197 char *buf) 198 { 199 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 200 int nr = sensor_attr->index; 201 struct vt8231_data *data = vt8231_update_device(dev); 202 203 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958); 204 } 205 206 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 207 char *buf) 208 { 209 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 210 int nr = sensor_attr->index; 211 struct vt8231_data *data = vt8231_update_device(dev); 212 213 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958)); 214 } 215 216 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 217 const char *buf, size_t count) 218 { 219 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 220 int nr = sensor_attr->index; 221 struct vt8231_data *data = dev_get_drvdata(dev); 222 unsigned long val = simple_strtoul(buf, NULL, 10); 223 224 mutex_lock(&data->update_lock); 225 data->in_min[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255); 226 vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]); 227 mutex_unlock(&data->update_lock); 228 return count; 229 } 230 231 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 232 const char *buf, size_t count) 233 { 234 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 235 int nr = sensor_attr->index; 236 struct vt8231_data *data = dev_get_drvdata(dev); 237 unsigned long val = simple_strtoul(buf, NULL, 10); 238 239 mutex_lock(&data->update_lock); 240 data->in_max[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255); 241 vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]); 242 mutex_unlock(&data->update_lock); 243 return count; 244 } 245 246 /* Special case for input 5 as this has 3.3V scaling built into the chip */ 247 static ssize_t show_in5(struct device *dev, struct device_attribute *attr, 248 char *buf) 249 { 250 struct vt8231_data *data = vt8231_update_device(dev); 251 252 return sprintf(buf, "%d\n", 253 (((data->in[5] - 3) * 10000 * 54) / (958 * 34))); 254 } 255 256 static ssize_t show_in5_min(struct device *dev, struct device_attribute *attr, 257 char *buf) 258 { 259 struct vt8231_data *data = vt8231_update_device(dev); 260 261 return sprintf(buf, "%d\n", 262 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34))); 263 } 264 265 static ssize_t show_in5_max(struct device *dev, struct device_attribute *attr, 266 char *buf) 267 { 268 struct vt8231_data *data = vt8231_update_device(dev); 269 270 return sprintf(buf, "%d\n", 271 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34))); 272 } 273 274 static ssize_t set_in5_min(struct device *dev, struct device_attribute *attr, 275 const char *buf, size_t count) 276 { 277 struct vt8231_data *data = dev_get_drvdata(dev); 278 unsigned long val = simple_strtoul(buf, NULL, 10); 279 280 mutex_lock(&data->update_lock); 281 data->in_min[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3, 282 0, 255); 283 vt8231_write_value(data, regvoltmin[5], data->in_min[5]); 284 mutex_unlock(&data->update_lock); 285 return count; 286 } 287 288 static ssize_t set_in5_max(struct device *dev, struct device_attribute *attr, 289 const char *buf, size_t count) 290 { 291 struct vt8231_data *data = dev_get_drvdata(dev); 292 unsigned long val = simple_strtoul(buf, NULL, 10); 293 294 mutex_lock(&data->update_lock); 295 data->in_max[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3, 296 0, 255); 297 vt8231_write_value(data, regvoltmax[5], data->in_max[5]); 298 mutex_unlock(&data->update_lock); 299 return count; 300 } 301 302 #define define_voltage_sysfs(offset) \ 303 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 304 show_in, NULL, offset); \ 305 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 306 show_in_min, set_in_min, offset); \ 307 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 308 show_in_max, set_in_max, offset) 309 310 define_voltage_sysfs(0); 311 define_voltage_sysfs(1); 312 define_voltage_sysfs(2); 313 define_voltage_sysfs(3); 314 define_voltage_sysfs(4); 315 316 static DEVICE_ATTR(in5_input, S_IRUGO, show_in5, NULL); 317 static DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR, show_in5_min, set_in5_min); 318 static DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR, show_in5_max, set_in5_max); 319 320 /* Temperatures */ 321 static ssize_t show_temp0(struct device *dev, struct device_attribute *attr, 322 char *buf) 323 { 324 struct vt8231_data *data = vt8231_update_device(dev); 325 return sprintf(buf, "%d\n", data->temp[0] * 250); 326 } 327 328 static ssize_t show_temp0_max(struct device *dev, struct device_attribute *attr, 329 char *buf) 330 { 331 struct vt8231_data *data = vt8231_update_device(dev); 332 return sprintf(buf, "%d\n", data->temp_max[0] * 1000); 333 } 334 335 static ssize_t show_temp0_min(struct device *dev, struct device_attribute *attr, 336 char *buf) 337 { 338 struct vt8231_data *data = vt8231_update_device(dev); 339 return sprintf(buf, "%d\n", data->temp_min[0] * 1000); 340 } 341 342 static ssize_t set_temp0_max(struct device *dev, struct device_attribute *attr, 343 const char *buf, size_t count) 344 { 345 struct vt8231_data *data = dev_get_drvdata(dev); 346 int val = simple_strtol(buf, NULL, 10); 347 348 mutex_lock(&data->update_lock); 349 data->temp_max[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255); 350 vt8231_write_value(data, regtempmax[0], data->temp_max[0]); 351 mutex_unlock(&data->update_lock); 352 return count; 353 } 354 static ssize_t set_temp0_min(struct device *dev, struct device_attribute *attr, 355 const char *buf, size_t count) 356 { 357 struct vt8231_data *data = dev_get_drvdata(dev); 358 int val = simple_strtol(buf, NULL, 10); 359 360 mutex_lock(&data->update_lock); 361 data->temp_min[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255); 362 vt8231_write_value(data, regtempmin[0], data->temp_min[0]); 363 mutex_unlock(&data->update_lock); 364 return count; 365 } 366 367 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 368 char *buf) 369 { 370 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 371 int nr = sensor_attr->index; 372 struct vt8231_data *data = vt8231_update_device(dev); 373 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 374 } 375 376 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 377 char *buf) 378 { 379 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 380 int nr = sensor_attr->index; 381 struct vt8231_data *data = vt8231_update_device(dev); 382 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr])); 383 } 384 385 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 386 char *buf) 387 { 388 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 389 int nr = sensor_attr->index; 390 struct vt8231_data *data = vt8231_update_device(dev); 391 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr])); 392 } 393 394 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 395 const char *buf, size_t count) 396 { 397 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 398 int nr = sensor_attr->index; 399 struct vt8231_data *data = dev_get_drvdata(dev); 400 int val = simple_strtol(buf, NULL, 10); 401 402 mutex_lock(&data->update_lock); 403 data->temp_max[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255); 404 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]); 405 mutex_unlock(&data->update_lock); 406 return count; 407 } 408 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 409 const char *buf, size_t count) 410 { 411 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 412 int nr = sensor_attr->index; 413 struct vt8231_data *data = dev_get_drvdata(dev); 414 int val = simple_strtol(buf, NULL, 10); 415 416 mutex_lock(&data->update_lock); 417 data->temp_min[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255); 418 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]); 419 mutex_unlock(&data->update_lock); 420 return count; 421 } 422 423 /* Note that these map the Linux temperature sensor numbering (1-6) to the VIA 424 ** temperature sensor numbering (0-5) 425 */ 426 #define define_temperature_sysfs(offset) \ 427 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 428 show_temp, NULL, offset - 1); \ 429 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 430 show_temp_max, set_temp_max, offset - 1); \ 431 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ 432 show_temp_min, set_temp_min, offset - 1) 433 434 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp0, NULL); 435 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp0_max, set_temp0_max); 436 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, show_temp0_min, set_temp0_min); 437 438 define_temperature_sysfs(2); 439 define_temperature_sysfs(3); 440 define_temperature_sysfs(4); 441 define_temperature_sysfs(5); 442 define_temperature_sysfs(6); 443 444 /* Fans */ 445 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 446 char *buf) 447 { 448 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 449 int nr = sensor_attr->index; 450 struct vt8231_data *data = vt8231_update_device(dev); 451 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 452 DIV_FROM_REG(data->fan_div[nr]))); 453 } 454 455 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 456 char *buf) 457 { 458 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 459 int nr = sensor_attr->index; 460 struct vt8231_data *data = vt8231_update_device(dev); 461 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 462 DIV_FROM_REG(data->fan_div[nr]))); 463 } 464 465 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 466 char *buf) 467 { 468 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 469 int nr = sensor_attr->index; 470 struct vt8231_data *data = vt8231_update_device(dev); 471 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 472 } 473 474 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 475 const char *buf, size_t count) 476 { 477 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 478 int nr = sensor_attr->index; 479 struct vt8231_data *data = dev_get_drvdata(dev); 480 int val = simple_strtoul(buf, NULL, 10); 481 482 mutex_lock(&data->update_lock); 483 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 484 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 485 mutex_unlock(&data->update_lock); 486 return count; 487 } 488 489 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 490 const char *buf, size_t count) 491 { 492 struct vt8231_data *data = dev_get_drvdata(dev); 493 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 494 unsigned long val = simple_strtoul(buf, NULL, 10); 495 int nr = sensor_attr->index; 496 int old = vt8231_read_value(data, VT8231_REG_FANDIV); 497 long min = FAN_FROM_REG(data->fan_min[nr], 498 DIV_FROM_REG(data->fan_div[nr])); 499 500 mutex_lock(&data->update_lock); 501 switch (val) { 502 case 1: data->fan_div[nr] = 0; break; 503 case 2: data->fan_div[nr] = 1; break; 504 case 4: data->fan_div[nr] = 2; break; 505 case 8: data->fan_div[nr] = 3; break; 506 default: 507 dev_err(dev, "fan_div value %ld not supported. " 508 "Choose one of 1, 2, 4 or 8!\n", val); 509 mutex_unlock(&data->update_lock); 510 return -EINVAL; 511 } 512 513 /* Correct the fan minimum speed */ 514 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 515 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 516 517 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); 518 vt8231_write_value(data, VT8231_REG_FANDIV, old); 519 mutex_unlock(&data->update_lock); 520 return count; 521 } 522 523 524 #define define_fan_sysfs(offset) \ 525 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 526 show_fan, NULL, offset - 1); \ 527 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 528 show_fan_div, set_fan_div, offset - 1); \ 529 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 530 show_fan_min, set_fan_min, offset - 1) 531 532 define_fan_sysfs(1); 533 define_fan_sysfs(2); 534 535 /* Alarms */ 536 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 537 char *buf) 538 { 539 struct vt8231_data *data = vt8231_update_device(dev); 540 return sprintf(buf, "%d\n", data->alarms); 541 } 542 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 543 544 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 545 char *buf) 546 { 547 int bitnr = to_sensor_dev_attr(attr)->index; 548 struct vt8231_data *data = vt8231_update_device(dev); 549 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 550 } 551 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 552 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11); 553 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0); 554 static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1); 555 static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 3); 556 static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 8); 557 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 11); 558 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0); 559 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 1); 560 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 561 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 562 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 2); 563 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 564 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 565 566 static ssize_t show_name(struct device *dev, struct device_attribute 567 *devattr, char *buf) 568 { 569 struct vt8231_data *data = dev_get_drvdata(dev); 570 return sprintf(buf, "%s\n", data->name); 571 } 572 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 573 574 static struct attribute *vt8231_attributes_temps[6][5] = { 575 { 576 &dev_attr_temp1_input.attr, 577 &dev_attr_temp1_max_hyst.attr, 578 &dev_attr_temp1_max.attr, 579 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 580 NULL 581 }, { 582 &sensor_dev_attr_temp2_input.dev_attr.attr, 583 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 584 &sensor_dev_attr_temp2_max.dev_attr.attr, 585 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 586 NULL 587 }, { 588 &sensor_dev_attr_temp3_input.dev_attr.attr, 589 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, 590 &sensor_dev_attr_temp3_max.dev_attr.attr, 591 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 592 NULL 593 }, { 594 &sensor_dev_attr_temp4_input.dev_attr.attr, 595 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, 596 &sensor_dev_attr_temp4_max.dev_attr.attr, 597 &sensor_dev_attr_temp4_alarm.dev_attr.attr, 598 NULL 599 }, { 600 &sensor_dev_attr_temp5_input.dev_attr.attr, 601 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, 602 &sensor_dev_attr_temp5_max.dev_attr.attr, 603 &sensor_dev_attr_temp5_alarm.dev_attr.attr, 604 NULL 605 }, { 606 &sensor_dev_attr_temp6_input.dev_attr.attr, 607 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr, 608 &sensor_dev_attr_temp6_max.dev_attr.attr, 609 &sensor_dev_attr_temp6_alarm.dev_attr.attr, 610 NULL 611 } 612 }; 613 614 static const struct attribute_group vt8231_group_temps[6] = { 615 { .attrs = vt8231_attributes_temps[0] }, 616 { .attrs = vt8231_attributes_temps[1] }, 617 { .attrs = vt8231_attributes_temps[2] }, 618 { .attrs = vt8231_attributes_temps[3] }, 619 { .attrs = vt8231_attributes_temps[4] }, 620 { .attrs = vt8231_attributes_temps[5] }, 621 }; 622 623 static struct attribute *vt8231_attributes_volts[6][5] = { 624 { 625 &sensor_dev_attr_in0_input.dev_attr.attr, 626 &sensor_dev_attr_in0_min.dev_attr.attr, 627 &sensor_dev_attr_in0_max.dev_attr.attr, 628 &sensor_dev_attr_in0_alarm.dev_attr.attr, 629 NULL 630 }, { 631 &sensor_dev_attr_in1_input.dev_attr.attr, 632 &sensor_dev_attr_in1_min.dev_attr.attr, 633 &sensor_dev_attr_in1_max.dev_attr.attr, 634 &sensor_dev_attr_in1_alarm.dev_attr.attr, 635 NULL 636 }, { 637 &sensor_dev_attr_in2_input.dev_attr.attr, 638 &sensor_dev_attr_in2_min.dev_attr.attr, 639 &sensor_dev_attr_in2_max.dev_attr.attr, 640 &sensor_dev_attr_in2_alarm.dev_attr.attr, 641 NULL 642 }, { 643 &sensor_dev_attr_in3_input.dev_attr.attr, 644 &sensor_dev_attr_in3_min.dev_attr.attr, 645 &sensor_dev_attr_in3_max.dev_attr.attr, 646 &sensor_dev_attr_in3_alarm.dev_attr.attr, 647 NULL 648 }, { 649 &sensor_dev_attr_in4_input.dev_attr.attr, 650 &sensor_dev_attr_in4_min.dev_attr.attr, 651 &sensor_dev_attr_in4_max.dev_attr.attr, 652 &sensor_dev_attr_in4_alarm.dev_attr.attr, 653 NULL 654 }, { 655 &dev_attr_in5_input.attr, 656 &dev_attr_in5_min.attr, 657 &dev_attr_in5_max.attr, 658 &sensor_dev_attr_in5_alarm.dev_attr.attr, 659 NULL 660 } 661 }; 662 663 static const struct attribute_group vt8231_group_volts[6] = { 664 { .attrs = vt8231_attributes_volts[0] }, 665 { .attrs = vt8231_attributes_volts[1] }, 666 { .attrs = vt8231_attributes_volts[2] }, 667 { .attrs = vt8231_attributes_volts[3] }, 668 { .attrs = vt8231_attributes_volts[4] }, 669 { .attrs = vt8231_attributes_volts[5] }, 670 }; 671 672 static struct attribute *vt8231_attributes[] = { 673 &sensor_dev_attr_fan1_input.dev_attr.attr, 674 &sensor_dev_attr_fan2_input.dev_attr.attr, 675 &sensor_dev_attr_fan1_min.dev_attr.attr, 676 &sensor_dev_attr_fan2_min.dev_attr.attr, 677 &sensor_dev_attr_fan1_div.dev_attr.attr, 678 &sensor_dev_attr_fan2_div.dev_attr.attr, 679 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 680 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 681 &dev_attr_alarms.attr, 682 &dev_attr_name.attr, 683 NULL 684 }; 685 686 static const struct attribute_group vt8231_group = { 687 .attrs = vt8231_attributes, 688 }; 689 690 static struct platform_driver vt8231_driver = { 691 .driver = { 692 .owner = THIS_MODULE, 693 .name = "vt8231", 694 }, 695 .probe = vt8231_probe, 696 .remove = __devexit_p(vt8231_remove), 697 }; 698 699 static struct pci_device_id vt8231_pci_ids[] = { 700 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) }, 701 { 0, } 702 }; 703 704 MODULE_DEVICE_TABLE(pci, vt8231_pci_ids); 705 706 static int __devinit vt8231_pci_probe(struct pci_dev *dev, 707 const struct pci_device_id *id); 708 709 static struct pci_driver vt8231_pci_driver = { 710 .name = "vt8231", 711 .id_table = vt8231_pci_ids, 712 .probe = vt8231_pci_probe, 713 }; 714 715 static int vt8231_probe(struct platform_device *pdev) 716 { 717 struct resource *res; 718 struct vt8231_data *data; 719 int err = 0, i; 720 721 /* Reserve the ISA region */ 722 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 723 if (!request_region(res->start, VT8231_EXTENT, 724 vt8231_driver.driver.name)) { 725 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n", 726 (unsigned long)res->start, (unsigned long)res->end); 727 return -ENODEV; 728 } 729 730 if (!(data = kzalloc(sizeof(struct vt8231_data), GFP_KERNEL))) { 731 err = -ENOMEM; 732 goto exit_release; 733 } 734 735 platform_set_drvdata(pdev, data); 736 data->addr = res->start; 737 data->name = "vt8231"; 738 739 mutex_init(&data->update_lock); 740 vt8231_init_device(data); 741 742 /* Register sysfs hooks */ 743 if ((err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group))) 744 goto exit_free; 745 746 /* Must update device information to find out the config field */ 747 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG); 748 749 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) { 750 if (ISTEMP(i, data->uch_config)) { 751 if ((err = sysfs_create_group(&pdev->dev.kobj, 752 &vt8231_group_temps[i]))) 753 goto exit_remove_files; 754 } 755 } 756 757 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) { 758 if (ISVOLT(i, data->uch_config)) { 759 if ((err = sysfs_create_group(&pdev->dev.kobj, 760 &vt8231_group_volts[i]))) 761 goto exit_remove_files; 762 } 763 } 764 765 data->hwmon_dev = hwmon_device_register(&pdev->dev); 766 if (IS_ERR(data->hwmon_dev)) { 767 err = PTR_ERR(data->hwmon_dev); 768 goto exit_remove_files; 769 } 770 return 0; 771 772 exit_remove_files: 773 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 774 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 775 776 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 777 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 778 779 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 780 781 exit_free: 782 platform_set_drvdata(pdev, NULL); 783 kfree(data); 784 785 exit_release: 786 release_region(res->start, VT8231_EXTENT); 787 return err; 788 } 789 790 static int __devexit vt8231_remove(struct platform_device *pdev) 791 { 792 struct vt8231_data *data = platform_get_drvdata(pdev); 793 int i; 794 795 hwmon_device_unregister(data->hwmon_dev); 796 797 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 798 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 799 800 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 801 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 802 803 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 804 805 release_region(data->addr, VT8231_EXTENT); 806 platform_set_drvdata(pdev, NULL); 807 kfree(data); 808 return 0; 809 } 810 811 static void vt8231_init_device(struct vt8231_data *data) 812 { 813 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0); 814 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0); 815 } 816 817 static struct vt8231_data *vt8231_update_device(struct device *dev) 818 { 819 struct vt8231_data *data = dev_get_drvdata(dev); 820 int i; 821 u16 low; 822 823 mutex_lock(&data->update_lock); 824 825 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 826 || !data->valid) { 827 for (i = 0; i < 6; i++) { 828 if (ISVOLT(i, data->uch_config)) { 829 data->in[i] = vt8231_read_value(data, 830 regvolt[i]); 831 data->in_min[i] = vt8231_read_value(data, 832 regvoltmin[i]); 833 data->in_max[i] = vt8231_read_value(data, 834 regvoltmax[i]); 835 } 836 } 837 for (i = 0; i < 2; i++) { 838 data->fan[i] = vt8231_read_value(data, 839 VT8231_REG_FAN(i)); 840 data->fan_min[i] = vt8231_read_value(data, 841 VT8231_REG_FAN_MIN(i)); 842 } 843 844 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01); 845 low = (low >> 6) | ((low & 0x30) >> 2) 846 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4); 847 for (i = 0; i < 6; i++) { 848 if (ISTEMP(i, data->uch_config)) { 849 data->temp[i] = (vt8231_read_value(data, 850 regtemp[i]) << 2) 851 | ((low >> (2 * i)) & 0x03); 852 data->temp_max[i] = vt8231_read_value(data, 853 regtempmax[i]); 854 data->temp_min[i] = vt8231_read_value(data, 855 regtempmin[i]); 856 } 857 } 858 859 i = vt8231_read_value(data, VT8231_REG_FANDIV); 860 data->fan_div[0] = (i >> 4) & 0x03; 861 data->fan_div[1] = i >> 6; 862 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) | 863 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8); 864 865 /* Set alarm flags correctly */ 866 if (!data->fan[0] && data->fan_min[0]) { 867 data->alarms |= 0x40; 868 } else if (data->fan[0] && !data->fan_min[0]) { 869 data->alarms &= ~0x40; 870 } 871 872 if (!data->fan[1] && data->fan_min[1]) { 873 data->alarms |= 0x80; 874 } else if (data->fan[1] && !data->fan_min[1]) { 875 data->alarms &= ~0x80; 876 } 877 878 data->last_updated = jiffies; 879 data->valid = 1; 880 } 881 882 mutex_unlock(&data->update_lock); 883 884 return data; 885 } 886 887 static int __devinit vt8231_device_add(unsigned short address) 888 { 889 struct resource res = { 890 .start = address, 891 .end = address + VT8231_EXTENT - 1, 892 .name = "vt8231", 893 .flags = IORESOURCE_IO, 894 }; 895 int err; 896 897 pdev = platform_device_alloc("vt8231", address); 898 if (!pdev) { 899 err = -ENOMEM; 900 printk(KERN_ERR "vt8231: Device allocation failed\n"); 901 goto exit; 902 } 903 904 err = platform_device_add_resources(pdev, &res, 1); 905 if (err) { 906 printk(KERN_ERR "vt8231: Device resource addition failed " 907 "(%d)\n", err); 908 goto exit_device_put; 909 } 910 911 err = platform_device_add(pdev); 912 if (err) { 913 printk(KERN_ERR "vt8231: Device addition failed (%d)\n", 914 err); 915 goto exit_device_put; 916 } 917 918 return 0; 919 920 exit_device_put: 921 platform_device_put(pdev); 922 exit: 923 return err; 924 } 925 926 static int __devinit vt8231_pci_probe(struct pci_dev *dev, 927 const struct pci_device_id *id) 928 { 929 u16 address, val; 930 if (force_addr) { 931 address = force_addr & 0xff00; 932 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", 933 address); 934 935 if (PCIBIOS_SUCCESSFUL != 936 pci_write_config_word(dev, VT8231_BASE_REG, address | 1)) 937 return -ENODEV; 938 } 939 940 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG, 941 &val)) 942 return -ENODEV; 943 944 address = val & ~(VT8231_EXTENT - 1); 945 if (address == 0) { 946 dev_err(&dev->dev, "base address not set -\ 947 upgrade BIOS or use force_addr=0xaddr\n"); 948 return -ENODEV; 949 } 950 951 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG, 952 &val)) 953 return -ENODEV; 954 955 if (!(val & 0x0001)) { 956 dev_warn(&dev->dev, "enabling sensors\n"); 957 if (PCIBIOS_SUCCESSFUL != 958 pci_write_config_word(dev, VT8231_ENABLE_REG, 959 val | 0x0001)) 960 return -ENODEV; 961 } 962 963 if (platform_driver_register(&vt8231_driver)) 964 goto exit; 965 966 /* Sets global pdev as a side effect */ 967 if (vt8231_device_add(address)) 968 goto exit_unregister; 969 970 /* Always return failure here. This is to allow other drivers to bind 971 * to this pci device. We don't really want to have control over the 972 * pci device, we only wanted to read as few register values from it. 973 */ 974 975 /* We do, however, mark ourselves as using the PCI device to stop it 976 getting unloaded. */ 977 s_bridge = pci_dev_get(dev); 978 return -ENODEV; 979 980 exit_unregister: 981 platform_driver_unregister(&vt8231_driver); 982 exit: 983 return -ENODEV; 984 } 985 986 static int __init sm_vt8231_init(void) 987 { 988 return pci_register_driver(&vt8231_pci_driver); 989 } 990 991 static void __exit sm_vt8231_exit(void) 992 { 993 pci_unregister_driver(&vt8231_pci_driver); 994 if (s_bridge != NULL) { 995 platform_device_unregister(pdev); 996 platform_driver_unregister(&vt8231_driver); 997 pci_dev_put(s_bridge); 998 s_bridge = NULL; 999 } 1000 } 1001 1002 MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>"); 1003 MODULE_DESCRIPTION("VT8231 sensors"); 1004 MODULE_LICENSE("GPL"); 1005 1006 module_init(sm_vt8231_init); 1007 module_exit(sm_vt8231_exit); 1008