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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 28 29 #include <linux/module.h> 30 #include <linux/init.h> 31 #include <linux/slab.h> 32 #include <linux/pci.h> 33 #include <linux/jiffies.h> 34 #include <linux/platform_device.h> 35 #include <linux/hwmon.h> 36 #include <linux/hwmon-sysfs.h> 37 #include <linux/hwmon-vid.h> 38 #include <linux/err.h> 39 #include <linux/mutex.h> 40 #include <linux/acpi.h> 41 #include <linux/io.h> 42 43 static int force_addr; 44 module_param(force_addr, int, 0); 45 MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors"); 46 47 static struct platform_device *pdev; 48 49 #define VT8231_EXTENT 0x80 50 #define VT8231_BASE_REG 0x70 51 #define VT8231_ENABLE_REG 0x74 52 53 /* The VT8231 registers 54 55 The reset value for the input channel configuration is used (Reg 0x4A=0x07) 56 which sets the selected inputs marked with '*' below if multiple options are 57 possible: 58 59 Voltage Mode Temperature Mode 60 Sensor Linux Id Linux Id VIA Id 61 -------- -------- -------- ------ 62 CPU Diode N/A temp1 0 63 UIC1 in0 temp2 * 1 64 UIC2 in1 * temp3 2 65 UIC3 in2 * temp4 3 66 UIC4 in3 * temp5 4 67 UIC5 in4 * temp6 5 68 3.3V in5 N/A 69 70 Note that the BIOS may set the configuration register to a different value 71 to match the motherboard configuration. 72 */ 73 74 /* fans numbered 0-1 */ 75 #define VT8231_REG_FAN_MIN(nr) (0x3b + (nr)) 76 #define VT8231_REG_FAN(nr) (0x29 + (nr)) 77 78 /* Voltage inputs numbered 0-5 */ 79 80 static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 }; 81 static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 }; 82 static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 }; 83 84 /* Temperatures are numbered 1-6 according to the Linux kernel specification. 85 ** 86 ** In the VIA datasheet, however, the temperatures are numbered from zero. 87 ** Since it is important that this driver can easily be compared to the VIA 88 ** datasheet, we will use the VIA numbering within this driver and map the 89 ** kernel sysfs device name to the VIA number in the sysfs callback. 90 */ 91 92 #define VT8231_REG_TEMP_LOW01 0x49 93 #define VT8231_REG_TEMP_LOW25 0x4d 94 95 static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 }; 96 static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 }; 97 static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 }; 98 99 #define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210) 100 #define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210) 101 #define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200) 102 103 #define VT8231_REG_CONFIG 0x40 104 #define VT8231_REG_ALARM1 0x41 105 #define VT8231_REG_ALARM2 0x42 106 #define VT8231_REG_FANDIV 0x47 107 #define VT8231_REG_UCH_CONFIG 0x4a 108 #define VT8231_REG_TEMP1_CONFIG 0x4b 109 #define VT8231_REG_TEMP2_CONFIG 0x4c 110 111 /* temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux 112 ** numbering 113 */ 114 #define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \ 115 ((ch_config) >> ((i)+1)) & 0x01) 116 /* voltages 0-5 */ 117 #define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \ 118 !(((ch_config) >> ((i)+2)) & 0x01)) 119 120 #define DIV_FROM_REG(val) (1 << (val)) 121 122 /* NB The values returned here are NOT temperatures. The calibration curves 123 ** for the thermistor curves are board-specific and must go in the 124 ** sensors.conf file. Temperature sensors are actually ten bits, but the 125 ** VIA datasheet only considers the 8 MSBs obtained from the regtemp[] 126 ** register. The temperature value returned should have a magnitude of 3, 127 ** so we use the VIA scaling as the "true" scaling and use the remaining 2 128 ** LSBs as fractional precision. 129 ** 130 ** All the on-chip hardware temperature comparisons for the alarms are only 131 ** 8-bits wide, and compare against the 8 MSBs of the temperature. The bits 132 ** in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are 133 ** ignored. 134 */ 135 136 /******** FAN RPM CONVERSIONS ******** 137 ** This chip saturates back at 0, not at 255 like many the other chips. 138 ** So, 0 means 0 RPM 139 */ 140 static inline u8 FAN_TO_REG(long rpm, int div) 141 { 142 if (rpm == 0) 143 return 0; 144 return SENSORS_LIMIT(1310720 / (rpm * div), 1, 255); 145 } 146 147 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div))) 148 149 struct vt8231_data { 150 unsigned short addr; 151 const char *name; 152 153 struct mutex update_lock; 154 struct device *hwmon_dev; 155 char valid; /* !=0 if following fields are valid */ 156 unsigned long last_updated; /* In jiffies */ 157 158 u8 in[6]; /* Register value */ 159 u8 in_max[6]; /* Register value */ 160 u8 in_min[6]; /* Register value */ 161 u16 temp[6]; /* Register value 10 bit, right aligned */ 162 u8 temp_max[6]; /* Register value */ 163 u8 temp_min[6]; /* Register value */ 164 u8 fan[2]; /* Register value */ 165 u8 fan_min[2]; /* Register value */ 166 u8 fan_div[2]; /* Register encoding, shifted right */ 167 u16 alarms; /* Register encoding */ 168 u8 uch_config; 169 }; 170 171 static struct pci_dev *s_bridge; 172 static int vt8231_probe(struct platform_device *pdev); 173 static int __devexit vt8231_remove(struct platform_device *pdev); 174 static struct vt8231_data *vt8231_update_device(struct device *dev); 175 static void vt8231_init_device(struct vt8231_data *data); 176 177 static inline int vt8231_read_value(struct vt8231_data *data, u8 reg) 178 { 179 return inb_p(data->addr + reg); 180 } 181 182 static inline void vt8231_write_value(struct vt8231_data *data, u8 reg, 183 u8 value) 184 { 185 outb_p(value, data->addr + reg); 186 } 187 188 /* following are the sysfs callback functions */ 189 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 190 char *buf) 191 { 192 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 193 int nr = sensor_attr->index; 194 struct vt8231_data *data = vt8231_update_device(dev); 195 196 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958); 197 } 198 199 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 200 char *buf) 201 { 202 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 203 int nr = sensor_attr->index; 204 struct vt8231_data *data = vt8231_update_device(dev); 205 206 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958); 207 } 208 209 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 210 char *buf) 211 { 212 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 213 int nr = sensor_attr->index; 214 struct vt8231_data *data = vt8231_update_device(dev); 215 216 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958)); 217 } 218 219 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 220 const char *buf, size_t count) 221 { 222 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 223 int nr = sensor_attr->index; 224 struct vt8231_data *data = dev_get_drvdata(dev); 225 unsigned long val = simple_strtoul(buf, NULL, 10); 226 227 mutex_lock(&data->update_lock); 228 data->in_min[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255); 229 vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]); 230 mutex_unlock(&data->update_lock); 231 return count; 232 } 233 234 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 235 const char *buf, size_t count) 236 { 237 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 238 int nr = sensor_attr->index; 239 struct vt8231_data *data = dev_get_drvdata(dev); 240 unsigned long val = simple_strtoul(buf, NULL, 10); 241 242 mutex_lock(&data->update_lock); 243 data->in_max[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255); 244 vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]); 245 mutex_unlock(&data->update_lock); 246 return count; 247 } 248 249 /* Special case for input 5 as this has 3.3V scaling built into the chip */ 250 static ssize_t show_in5(struct device *dev, struct device_attribute *attr, 251 char *buf) 252 { 253 struct vt8231_data *data = vt8231_update_device(dev); 254 255 return sprintf(buf, "%d\n", 256 (((data->in[5] - 3) * 10000 * 54) / (958 * 34))); 257 } 258 259 static ssize_t show_in5_min(struct device *dev, struct device_attribute *attr, 260 char *buf) 261 { 262 struct vt8231_data *data = vt8231_update_device(dev); 263 264 return sprintf(buf, "%d\n", 265 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34))); 266 } 267 268 static ssize_t show_in5_max(struct device *dev, struct device_attribute *attr, 269 char *buf) 270 { 271 struct vt8231_data *data = vt8231_update_device(dev); 272 273 return sprintf(buf, "%d\n", 274 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34))); 275 } 276 277 static ssize_t set_in5_min(struct device *dev, struct device_attribute *attr, 278 const char *buf, size_t count) 279 { 280 struct vt8231_data *data = dev_get_drvdata(dev); 281 unsigned long val = simple_strtoul(buf, NULL, 10); 282 283 mutex_lock(&data->update_lock); 284 data->in_min[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3, 285 0, 255); 286 vt8231_write_value(data, regvoltmin[5], data->in_min[5]); 287 mutex_unlock(&data->update_lock); 288 return count; 289 } 290 291 static ssize_t set_in5_max(struct device *dev, struct device_attribute *attr, 292 const char *buf, size_t count) 293 { 294 struct vt8231_data *data = dev_get_drvdata(dev); 295 unsigned long val = simple_strtoul(buf, NULL, 10); 296 297 mutex_lock(&data->update_lock); 298 data->in_max[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3, 299 0, 255); 300 vt8231_write_value(data, regvoltmax[5], data->in_max[5]); 301 mutex_unlock(&data->update_lock); 302 return count; 303 } 304 305 #define define_voltage_sysfs(offset) \ 306 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 307 show_in, NULL, offset); \ 308 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 309 show_in_min, set_in_min, offset); \ 310 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 311 show_in_max, set_in_max, offset) 312 313 define_voltage_sysfs(0); 314 define_voltage_sysfs(1); 315 define_voltage_sysfs(2); 316 define_voltage_sysfs(3); 317 define_voltage_sysfs(4); 318 319 static DEVICE_ATTR(in5_input, S_IRUGO, show_in5, NULL); 320 static DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR, show_in5_min, set_in5_min); 321 static DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR, show_in5_max, set_in5_max); 322 323 /* Temperatures */ 324 static ssize_t show_temp0(struct device *dev, struct device_attribute *attr, 325 char *buf) 326 { 327 struct vt8231_data *data = vt8231_update_device(dev); 328 return sprintf(buf, "%d\n", data->temp[0] * 250); 329 } 330 331 static ssize_t show_temp0_max(struct device *dev, struct device_attribute *attr, 332 char *buf) 333 { 334 struct vt8231_data *data = vt8231_update_device(dev); 335 return sprintf(buf, "%d\n", data->temp_max[0] * 1000); 336 } 337 338 static ssize_t show_temp0_min(struct device *dev, struct device_attribute *attr, 339 char *buf) 340 { 341 struct vt8231_data *data = vt8231_update_device(dev); 342 return sprintf(buf, "%d\n", data->temp_min[0] * 1000); 343 } 344 345 static ssize_t set_temp0_max(struct device *dev, struct device_attribute *attr, 346 const char *buf, size_t count) 347 { 348 struct vt8231_data *data = dev_get_drvdata(dev); 349 int val = simple_strtol(buf, NULL, 10); 350 351 mutex_lock(&data->update_lock); 352 data->temp_max[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255); 353 vt8231_write_value(data, regtempmax[0], data->temp_max[0]); 354 mutex_unlock(&data->update_lock); 355 return count; 356 } 357 static ssize_t set_temp0_min(struct device *dev, struct device_attribute *attr, 358 const char *buf, size_t count) 359 { 360 struct vt8231_data *data = dev_get_drvdata(dev); 361 int val = simple_strtol(buf, NULL, 10); 362 363 mutex_lock(&data->update_lock); 364 data->temp_min[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255); 365 vt8231_write_value(data, regtempmin[0], data->temp_min[0]); 366 mutex_unlock(&data->update_lock); 367 return count; 368 } 369 370 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 371 char *buf) 372 { 373 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 374 int nr = sensor_attr->index; 375 struct vt8231_data *data = vt8231_update_device(dev); 376 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 377 } 378 379 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 380 char *buf) 381 { 382 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 383 int nr = sensor_attr->index; 384 struct vt8231_data *data = vt8231_update_device(dev); 385 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr])); 386 } 387 388 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 389 char *buf) 390 { 391 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 392 int nr = sensor_attr->index; 393 struct vt8231_data *data = vt8231_update_device(dev); 394 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr])); 395 } 396 397 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 398 const char *buf, size_t count) 399 { 400 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 401 int nr = sensor_attr->index; 402 struct vt8231_data *data = dev_get_drvdata(dev); 403 int val = simple_strtol(buf, NULL, 10); 404 405 mutex_lock(&data->update_lock); 406 data->temp_max[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255); 407 vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]); 408 mutex_unlock(&data->update_lock); 409 return count; 410 } 411 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 412 const char *buf, size_t count) 413 { 414 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 415 int nr = sensor_attr->index; 416 struct vt8231_data *data = dev_get_drvdata(dev); 417 int val = simple_strtol(buf, NULL, 10); 418 419 mutex_lock(&data->update_lock); 420 data->temp_min[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255); 421 vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]); 422 mutex_unlock(&data->update_lock); 423 return count; 424 } 425 426 /* Note that these map the Linux temperature sensor numbering (1-6) to the VIA 427 ** temperature sensor numbering (0-5) 428 */ 429 #define define_temperature_sysfs(offset) \ 430 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 431 show_temp, NULL, offset - 1); \ 432 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 433 show_temp_max, set_temp_max, offset - 1); \ 434 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ 435 show_temp_min, set_temp_min, offset - 1) 436 437 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp0, NULL); 438 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp0_max, set_temp0_max); 439 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, show_temp0_min, set_temp0_min); 440 441 define_temperature_sysfs(2); 442 define_temperature_sysfs(3); 443 define_temperature_sysfs(4); 444 define_temperature_sysfs(5); 445 define_temperature_sysfs(6); 446 447 /* Fans */ 448 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 449 char *buf) 450 { 451 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 452 int nr = sensor_attr->index; 453 struct vt8231_data *data = vt8231_update_device(dev); 454 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 455 DIV_FROM_REG(data->fan_div[nr]))); 456 } 457 458 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 459 char *buf) 460 { 461 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 462 int nr = sensor_attr->index; 463 struct vt8231_data *data = vt8231_update_device(dev); 464 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 465 DIV_FROM_REG(data->fan_div[nr]))); 466 } 467 468 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 469 char *buf) 470 { 471 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 472 int nr = sensor_attr->index; 473 struct vt8231_data *data = vt8231_update_device(dev); 474 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 475 } 476 477 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 478 const char *buf, size_t count) 479 { 480 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 481 int nr = sensor_attr->index; 482 struct vt8231_data *data = dev_get_drvdata(dev); 483 int val = simple_strtoul(buf, NULL, 10); 484 485 mutex_lock(&data->update_lock); 486 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 487 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 488 mutex_unlock(&data->update_lock); 489 return count; 490 } 491 492 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 493 const char *buf, size_t count) 494 { 495 struct vt8231_data *data = dev_get_drvdata(dev); 496 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 497 unsigned long val = simple_strtoul(buf, NULL, 10); 498 int nr = sensor_attr->index; 499 int old = vt8231_read_value(data, VT8231_REG_FANDIV); 500 long min = FAN_FROM_REG(data->fan_min[nr], 501 DIV_FROM_REG(data->fan_div[nr])); 502 503 mutex_lock(&data->update_lock); 504 switch (val) { 505 case 1: data->fan_div[nr] = 0; break; 506 case 2: data->fan_div[nr] = 1; break; 507 case 4: data->fan_div[nr] = 2; break; 508 case 8: data->fan_div[nr] = 3; break; 509 default: 510 dev_err(dev, "fan_div value %ld not supported. " 511 "Choose one of 1, 2, 4 or 8!\n", val); 512 mutex_unlock(&data->update_lock); 513 return -EINVAL; 514 } 515 516 /* Correct the fan minimum speed */ 517 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 518 vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 519 520 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); 521 vt8231_write_value(data, VT8231_REG_FANDIV, old); 522 mutex_unlock(&data->update_lock); 523 return count; 524 } 525 526 527 #define define_fan_sysfs(offset) \ 528 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 529 show_fan, NULL, offset - 1); \ 530 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 531 show_fan_div, set_fan_div, offset - 1); \ 532 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 533 show_fan_min, set_fan_min, offset - 1) 534 535 define_fan_sysfs(1); 536 define_fan_sysfs(2); 537 538 /* Alarms */ 539 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 540 char *buf) 541 { 542 struct vt8231_data *data = vt8231_update_device(dev); 543 return sprintf(buf, "%d\n", data->alarms); 544 } 545 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 546 547 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 548 char *buf) 549 { 550 int bitnr = to_sensor_dev_attr(attr)->index; 551 struct vt8231_data *data = vt8231_update_device(dev); 552 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 553 } 554 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 555 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11); 556 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0); 557 static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1); 558 static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 3); 559 static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 8); 560 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 11); 561 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0); 562 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 1); 563 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 564 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 565 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 2); 566 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 567 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 568 569 static ssize_t show_name(struct device *dev, struct device_attribute 570 *devattr, char *buf) 571 { 572 struct vt8231_data *data = dev_get_drvdata(dev); 573 return sprintf(buf, "%s\n", data->name); 574 } 575 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 576 577 static struct attribute *vt8231_attributes_temps[6][5] = { 578 { 579 &dev_attr_temp1_input.attr, 580 &dev_attr_temp1_max_hyst.attr, 581 &dev_attr_temp1_max.attr, 582 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 583 NULL 584 }, { 585 &sensor_dev_attr_temp2_input.dev_attr.attr, 586 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 587 &sensor_dev_attr_temp2_max.dev_attr.attr, 588 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 589 NULL 590 }, { 591 &sensor_dev_attr_temp3_input.dev_attr.attr, 592 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, 593 &sensor_dev_attr_temp3_max.dev_attr.attr, 594 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 595 NULL 596 }, { 597 &sensor_dev_attr_temp4_input.dev_attr.attr, 598 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, 599 &sensor_dev_attr_temp4_max.dev_attr.attr, 600 &sensor_dev_attr_temp4_alarm.dev_attr.attr, 601 NULL 602 }, { 603 &sensor_dev_attr_temp5_input.dev_attr.attr, 604 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, 605 &sensor_dev_attr_temp5_max.dev_attr.attr, 606 &sensor_dev_attr_temp5_alarm.dev_attr.attr, 607 NULL 608 }, { 609 &sensor_dev_attr_temp6_input.dev_attr.attr, 610 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr, 611 &sensor_dev_attr_temp6_max.dev_attr.attr, 612 &sensor_dev_attr_temp6_alarm.dev_attr.attr, 613 NULL 614 } 615 }; 616 617 static const struct attribute_group vt8231_group_temps[6] = { 618 { .attrs = vt8231_attributes_temps[0] }, 619 { .attrs = vt8231_attributes_temps[1] }, 620 { .attrs = vt8231_attributes_temps[2] }, 621 { .attrs = vt8231_attributes_temps[3] }, 622 { .attrs = vt8231_attributes_temps[4] }, 623 { .attrs = vt8231_attributes_temps[5] }, 624 }; 625 626 static struct attribute *vt8231_attributes_volts[6][5] = { 627 { 628 &sensor_dev_attr_in0_input.dev_attr.attr, 629 &sensor_dev_attr_in0_min.dev_attr.attr, 630 &sensor_dev_attr_in0_max.dev_attr.attr, 631 &sensor_dev_attr_in0_alarm.dev_attr.attr, 632 NULL 633 }, { 634 &sensor_dev_attr_in1_input.dev_attr.attr, 635 &sensor_dev_attr_in1_min.dev_attr.attr, 636 &sensor_dev_attr_in1_max.dev_attr.attr, 637 &sensor_dev_attr_in1_alarm.dev_attr.attr, 638 NULL 639 }, { 640 &sensor_dev_attr_in2_input.dev_attr.attr, 641 &sensor_dev_attr_in2_min.dev_attr.attr, 642 &sensor_dev_attr_in2_max.dev_attr.attr, 643 &sensor_dev_attr_in2_alarm.dev_attr.attr, 644 NULL 645 }, { 646 &sensor_dev_attr_in3_input.dev_attr.attr, 647 &sensor_dev_attr_in3_min.dev_attr.attr, 648 &sensor_dev_attr_in3_max.dev_attr.attr, 649 &sensor_dev_attr_in3_alarm.dev_attr.attr, 650 NULL 651 }, { 652 &sensor_dev_attr_in4_input.dev_attr.attr, 653 &sensor_dev_attr_in4_min.dev_attr.attr, 654 &sensor_dev_attr_in4_max.dev_attr.attr, 655 &sensor_dev_attr_in4_alarm.dev_attr.attr, 656 NULL 657 }, { 658 &dev_attr_in5_input.attr, 659 &dev_attr_in5_min.attr, 660 &dev_attr_in5_max.attr, 661 &sensor_dev_attr_in5_alarm.dev_attr.attr, 662 NULL 663 } 664 }; 665 666 static const struct attribute_group vt8231_group_volts[6] = { 667 { .attrs = vt8231_attributes_volts[0] }, 668 { .attrs = vt8231_attributes_volts[1] }, 669 { .attrs = vt8231_attributes_volts[2] }, 670 { .attrs = vt8231_attributes_volts[3] }, 671 { .attrs = vt8231_attributes_volts[4] }, 672 { .attrs = vt8231_attributes_volts[5] }, 673 }; 674 675 static struct attribute *vt8231_attributes[] = { 676 &sensor_dev_attr_fan1_input.dev_attr.attr, 677 &sensor_dev_attr_fan2_input.dev_attr.attr, 678 &sensor_dev_attr_fan1_min.dev_attr.attr, 679 &sensor_dev_attr_fan2_min.dev_attr.attr, 680 &sensor_dev_attr_fan1_div.dev_attr.attr, 681 &sensor_dev_attr_fan2_div.dev_attr.attr, 682 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 683 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 684 &dev_attr_alarms.attr, 685 &dev_attr_name.attr, 686 NULL 687 }; 688 689 static const struct attribute_group vt8231_group = { 690 .attrs = vt8231_attributes, 691 }; 692 693 static struct platform_driver vt8231_driver = { 694 .driver = { 695 .owner = THIS_MODULE, 696 .name = "vt8231", 697 }, 698 .probe = vt8231_probe, 699 .remove = __devexit_p(vt8231_remove), 700 }; 701 702 static const struct pci_device_id vt8231_pci_ids[] = { 703 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) }, 704 { 0, } 705 }; 706 707 MODULE_DEVICE_TABLE(pci, vt8231_pci_ids); 708 709 static int __devinit vt8231_pci_probe(struct pci_dev *dev, 710 const struct pci_device_id *id); 711 712 static struct pci_driver vt8231_pci_driver = { 713 .name = "vt8231", 714 .id_table = vt8231_pci_ids, 715 .probe = vt8231_pci_probe, 716 }; 717 718 static int vt8231_probe(struct platform_device *pdev) 719 { 720 struct resource *res; 721 struct vt8231_data *data; 722 int err = 0, i; 723 724 /* Reserve the ISA region */ 725 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 726 if (!request_region(res->start, VT8231_EXTENT, 727 vt8231_driver.driver.name)) { 728 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n", 729 (unsigned long)res->start, (unsigned long)res->end); 730 return -ENODEV; 731 } 732 733 if (!(data = kzalloc(sizeof(struct vt8231_data), GFP_KERNEL))) { 734 err = -ENOMEM; 735 goto exit_release; 736 } 737 738 platform_set_drvdata(pdev, data); 739 data->addr = res->start; 740 data->name = "vt8231"; 741 742 mutex_init(&data->update_lock); 743 vt8231_init_device(data); 744 745 /* Register sysfs hooks */ 746 if ((err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group))) 747 goto exit_free; 748 749 /* Must update device information to find out the config field */ 750 data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG); 751 752 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) { 753 if (ISTEMP(i, data->uch_config)) { 754 if ((err = sysfs_create_group(&pdev->dev.kobj, 755 &vt8231_group_temps[i]))) 756 goto exit_remove_files; 757 } 758 } 759 760 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) { 761 if (ISVOLT(i, data->uch_config)) { 762 if ((err = sysfs_create_group(&pdev->dev.kobj, 763 &vt8231_group_volts[i]))) 764 goto exit_remove_files; 765 } 766 } 767 768 data->hwmon_dev = hwmon_device_register(&pdev->dev); 769 if (IS_ERR(data->hwmon_dev)) { 770 err = PTR_ERR(data->hwmon_dev); 771 goto exit_remove_files; 772 } 773 return 0; 774 775 exit_remove_files: 776 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 777 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 778 779 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 780 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 781 782 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 783 784 exit_free: 785 platform_set_drvdata(pdev, NULL); 786 kfree(data); 787 788 exit_release: 789 release_region(res->start, VT8231_EXTENT); 790 return err; 791 } 792 793 static int __devexit vt8231_remove(struct platform_device *pdev) 794 { 795 struct vt8231_data *data = platform_get_drvdata(pdev); 796 int i; 797 798 hwmon_device_unregister(data->hwmon_dev); 799 800 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 801 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]); 802 803 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 804 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]); 805 806 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group); 807 808 release_region(data->addr, VT8231_EXTENT); 809 platform_set_drvdata(pdev, NULL); 810 kfree(data); 811 return 0; 812 } 813 814 static void vt8231_init_device(struct vt8231_data *data) 815 { 816 vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0); 817 vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0); 818 } 819 820 static struct vt8231_data *vt8231_update_device(struct device *dev) 821 { 822 struct vt8231_data *data = dev_get_drvdata(dev); 823 int i; 824 u16 low; 825 826 mutex_lock(&data->update_lock); 827 828 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 829 || !data->valid) { 830 for (i = 0; i < 6; i++) { 831 if (ISVOLT(i, data->uch_config)) { 832 data->in[i] = vt8231_read_value(data, 833 regvolt[i]); 834 data->in_min[i] = vt8231_read_value(data, 835 regvoltmin[i]); 836 data->in_max[i] = vt8231_read_value(data, 837 regvoltmax[i]); 838 } 839 } 840 for (i = 0; i < 2; i++) { 841 data->fan[i] = vt8231_read_value(data, 842 VT8231_REG_FAN(i)); 843 data->fan_min[i] = vt8231_read_value(data, 844 VT8231_REG_FAN_MIN(i)); 845 } 846 847 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01); 848 low = (low >> 6) | ((low & 0x30) >> 2) 849 | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4); 850 for (i = 0; i < 6; i++) { 851 if (ISTEMP(i, data->uch_config)) { 852 data->temp[i] = (vt8231_read_value(data, 853 regtemp[i]) << 2) 854 | ((low >> (2 * i)) & 0x03); 855 data->temp_max[i] = vt8231_read_value(data, 856 regtempmax[i]); 857 data->temp_min[i] = vt8231_read_value(data, 858 regtempmin[i]); 859 } 860 } 861 862 i = vt8231_read_value(data, VT8231_REG_FANDIV); 863 data->fan_div[0] = (i >> 4) & 0x03; 864 data->fan_div[1] = i >> 6; 865 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) | 866 (vt8231_read_value(data, VT8231_REG_ALARM2) << 8); 867 868 /* Set alarm flags correctly */ 869 if (!data->fan[0] && data->fan_min[0]) { 870 data->alarms |= 0x40; 871 } else if (data->fan[0] && !data->fan_min[0]) { 872 data->alarms &= ~0x40; 873 } 874 875 if (!data->fan[1] && data->fan_min[1]) { 876 data->alarms |= 0x80; 877 } else if (data->fan[1] && !data->fan_min[1]) { 878 data->alarms &= ~0x80; 879 } 880 881 data->last_updated = jiffies; 882 data->valid = 1; 883 } 884 885 mutex_unlock(&data->update_lock); 886 887 return data; 888 } 889 890 static int __devinit vt8231_device_add(unsigned short address) 891 { 892 struct resource res = { 893 .start = address, 894 .end = address + VT8231_EXTENT - 1, 895 .name = "vt8231", 896 .flags = IORESOURCE_IO, 897 }; 898 int err; 899 900 err = acpi_check_resource_conflict(&res); 901 if (err) 902 goto exit; 903 904 pdev = platform_device_alloc("vt8231", address); 905 if (!pdev) { 906 err = -ENOMEM; 907 pr_err("Device allocation failed\n"); 908 goto exit; 909 } 910 911 err = platform_device_add_resources(pdev, &res, 1); 912 if (err) { 913 pr_err("Device resource addition failed (%d)\n", err); 914 goto exit_device_put; 915 } 916 917 err = platform_device_add(pdev); 918 if (err) { 919 pr_err("Device addition failed (%d)\n", err); 920 goto exit_device_put; 921 } 922 923 return 0; 924 925 exit_device_put: 926 platform_device_put(pdev); 927 exit: 928 return err; 929 } 930 931 static 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; 983 984 exit_unregister: 985 platform_driver_unregister(&vt8231_driver); 986 exit: 987 return -ENODEV; 988 } 989 990 static int __init sm_vt8231_init(void) 991 { 992 return pci_register_driver(&vt8231_pci_driver); 993 } 994 995 static 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 1006 MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>"); 1007 MODULE_DESCRIPTION("VT8231 sensors"); 1008 MODULE_LICENSE("GPL"); 1009 1010 module_init(sm_vt8231_init); 1011 module_exit(sm_vt8231_exit); 1012