1 /* 2 vt8231.c - Part of lm_sensors, Linux kernel modules 3 for hardware monitoring 4 5 Copyright (c) 2005 Roger Lucas <roger@planbit.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/i2c.h> 33 #include <linux/i2c-isa.h> 34 #include <linux/hwmon.h> 35 #include <linux/hwmon-sysfs.h> 36 #include <linux/hwmon-vid.h> 37 #include <linux/err.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 /* Device address 45 Note that we can't determine the ISA address until we have initialized 46 our module */ 47 static unsigned short isa_address; 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 struct i2c_client client; 151 struct semaphore update_lock; 152 struct class_device *class_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 }; 168 169 static struct pci_dev *s_bridge; 170 static int vt8231_detect(struct i2c_adapter *adapter); 171 static int vt8231_detach_client(struct i2c_client *client); 172 static struct vt8231_data *vt8231_update_device(struct device *dev); 173 static void vt8231_init_client(struct i2c_client *client); 174 175 static inline int vt8231_read_value(struct i2c_client *client, u8 reg) 176 { 177 return inb_p(client->addr + reg); 178 } 179 180 static inline void vt8231_write_value(struct i2c_client *client, u8 reg, 181 u8 value) 182 { 183 outb_p(value, client->addr + reg); 184 } 185 186 /* following are the sysfs callback functions */ 187 static 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 } 196 197 static 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 } 206 207 static 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 } 216 217 static 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 i2c_client *client = to_i2c_client(dev); 223 struct vt8231_data *data = i2c_get_clientdata(client); 224 unsigned long val = simple_strtoul(buf, NULL, 10); 225 226 down(&data->update_lock); 227 data->in_min[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255); 228 vt8231_write_value(client, regvoltmin[nr], data->in_min[nr]); 229 up(&data->update_lock); 230 return count; 231 } 232 233 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 234 const char *buf, size_t count) 235 { 236 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 237 int nr = sensor_attr->index; 238 struct i2c_client *client = to_i2c_client(dev); 239 struct vt8231_data *data = i2c_get_clientdata(client); 240 unsigned long val = simple_strtoul(buf, NULL, 10); 241 242 down(&data->update_lock); 243 data->in_max[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255); 244 vt8231_write_value(client, regvoltmax[nr], data->in_max[nr]); 245 up(&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 i2c_client *client = to_i2c_client(dev); 281 struct vt8231_data *data = i2c_get_clientdata(client); 282 unsigned long val = simple_strtoul(buf, NULL, 10); 283 284 down(&data->update_lock); 285 data->in_min[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3, 286 0, 255); 287 vt8231_write_value(client, regvoltmin[5], data->in_min[5]); 288 up(&data->update_lock); 289 return count; 290 } 291 292 static ssize_t set_in5_max(struct device *dev, struct device_attribute *attr, 293 const char *buf, size_t count) 294 { 295 struct i2c_client *client = to_i2c_client(dev); 296 struct vt8231_data *data = i2c_get_clientdata(client); 297 unsigned long val = simple_strtoul(buf, NULL, 10); 298 299 down(&data->update_lock); 300 data->in_max[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3, 301 0, 255); 302 vt8231_write_value(client, regvoltmax[5], data->in_max[5]); 303 up(&data->update_lock); 304 return count; 305 } 306 307 #define define_voltage_sysfs(offset) \ 308 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 309 show_in, NULL, offset); \ 310 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 311 show_in_min, set_in_min, offset); \ 312 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 313 show_in_max, set_in_max, offset) 314 315 define_voltage_sysfs(0); 316 define_voltage_sysfs(1); 317 define_voltage_sysfs(2); 318 define_voltage_sysfs(3); 319 define_voltage_sysfs(4); 320 321 static DEVICE_ATTR(in5_input, S_IRUGO, show_in5, NULL); 322 static DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR, show_in5_min, set_in5_min); 323 static DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR, show_in5_max, set_in5_max); 324 325 /* Temperatures */ 326 static ssize_t show_temp0(struct device *dev, struct device_attribute *attr, 327 char *buf) 328 { 329 struct vt8231_data *data = vt8231_update_device(dev); 330 return sprintf(buf, "%d\n", data->temp[0] * 250); 331 } 332 333 static ssize_t show_temp0_max(struct device *dev, struct device_attribute *attr, 334 char *buf) 335 { 336 struct vt8231_data *data = vt8231_update_device(dev); 337 return sprintf(buf, "%d\n", data->temp_max[0] * 1000); 338 } 339 340 static ssize_t show_temp0_min(struct device *dev, struct device_attribute *attr, 341 char *buf) 342 { 343 struct vt8231_data *data = vt8231_update_device(dev); 344 return sprintf(buf, "%d\n", data->temp_min[0] * 1000); 345 } 346 347 static ssize_t set_temp0_max(struct device *dev, struct device_attribute *attr, 348 const char *buf, size_t count) 349 { 350 struct i2c_client *client = to_i2c_client(dev); 351 struct vt8231_data *data = i2c_get_clientdata(client); 352 int val = simple_strtol(buf, NULL, 10); 353 354 down(&data->update_lock); 355 data->temp_max[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255); 356 vt8231_write_value(client, regtempmax[0], data->temp_max[0]); 357 up(&data->update_lock); 358 return count; 359 } 360 static ssize_t set_temp0_min(struct device *dev, struct device_attribute *attr, 361 const char *buf, size_t count) 362 { 363 struct i2c_client *client = to_i2c_client(dev); 364 struct vt8231_data *data = i2c_get_clientdata(client); 365 int val = simple_strtol(buf, NULL, 10); 366 367 down(&data->update_lock); 368 data->temp_min[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255); 369 vt8231_write_value(client, regtempmin[0], data->temp_min[0]); 370 up(&data->update_lock); 371 return count; 372 } 373 374 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 375 char *buf) 376 { 377 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 378 int nr = sensor_attr->index; 379 struct vt8231_data *data = vt8231_update_device(dev); 380 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 381 } 382 383 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 384 char *buf) 385 { 386 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 387 int nr = sensor_attr->index; 388 struct vt8231_data *data = vt8231_update_device(dev); 389 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr])); 390 } 391 392 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 393 char *buf) 394 { 395 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 396 int nr = sensor_attr->index; 397 struct vt8231_data *data = vt8231_update_device(dev); 398 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr])); 399 } 400 401 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 402 const char *buf, size_t count) 403 { 404 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 405 int nr = sensor_attr->index; 406 struct i2c_client *client = to_i2c_client(dev); 407 struct vt8231_data *data = i2c_get_clientdata(client); 408 int val = simple_strtol(buf, NULL, 10); 409 410 down(&data->update_lock); 411 data->temp_max[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255); 412 vt8231_write_value(client, regtempmax[nr], data->temp_max[nr]); 413 up(&data->update_lock); 414 return count; 415 } 416 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 417 const char *buf, size_t count) 418 { 419 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 420 int nr = sensor_attr->index; 421 struct i2c_client *client = to_i2c_client(dev); 422 struct vt8231_data *data = i2c_get_clientdata(client); 423 int val = simple_strtol(buf, NULL, 10); 424 425 down(&data->update_lock); 426 data->temp_min[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255); 427 vt8231_write_value(client, regtempmin[nr], data->temp_min[nr]); 428 up(&data->update_lock); 429 return count; 430 } 431 432 /* Note that these map the Linux temperature sensor numbering (1-6) to the VIA 433 ** temperature sensor numbering (0-5) 434 */ 435 #define define_temperature_sysfs(offset) \ 436 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 437 show_temp, NULL, offset - 1); \ 438 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 439 show_temp_max, set_temp_max, offset - 1); \ 440 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 441 show_temp_min, set_temp_min, offset - 1) 442 443 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp0, NULL); 444 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp0_max, set_temp0_max); 445 static DEVICE_ATTR(temp1_min, S_IRUGO | S_IWUSR, show_temp0_min, set_temp0_min); 446 447 define_temperature_sysfs(2); 448 define_temperature_sysfs(3); 449 define_temperature_sysfs(4); 450 define_temperature_sysfs(5); 451 define_temperature_sysfs(6); 452 453 #define CFG_INFO_TEMP(id) { &sensor_dev_attr_temp##id##_input.dev_attr, \ 454 &sensor_dev_attr_temp##id##_min.dev_attr, \ 455 &sensor_dev_attr_temp##id##_max.dev_attr } 456 #define CFG_INFO_VOLT(id) { &sensor_dev_attr_in##id##_input.dev_attr, \ 457 &sensor_dev_attr_in##id##_min.dev_attr, \ 458 &sensor_dev_attr_in##id##_max.dev_attr } 459 460 struct str_device_attr_table { 461 struct device_attribute *input; 462 struct device_attribute *min; 463 struct device_attribute *max; 464 }; 465 466 static struct str_device_attr_table cfg_info_temp[] = { 467 { &dev_attr_temp1_input, &dev_attr_temp1_min, &dev_attr_temp1_max }, 468 CFG_INFO_TEMP(2), 469 CFG_INFO_TEMP(3), 470 CFG_INFO_TEMP(4), 471 CFG_INFO_TEMP(5), 472 CFG_INFO_TEMP(6) 473 }; 474 475 static struct str_device_attr_table cfg_info_volt[] = { 476 CFG_INFO_VOLT(0), 477 CFG_INFO_VOLT(1), 478 CFG_INFO_VOLT(2), 479 CFG_INFO_VOLT(3), 480 CFG_INFO_VOLT(4), 481 { &dev_attr_in5_input, &dev_attr_in5_min, &dev_attr_in5_max } 482 }; 483 484 /* Fans */ 485 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 486 char *buf) 487 { 488 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 489 int nr = sensor_attr->index; 490 struct vt8231_data *data = vt8231_update_device(dev); 491 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 492 DIV_FROM_REG(data->fan_div[nr]))); 493 } 494 495 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 496 char *buf) 497 { 498 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 499 int nr = sensor_attr->index; 500 struct vt8231_data *data = vt8231_update_device(dev); 501 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 502 DIV_FROM_REG(data->fan_div[nr]))); 503 } 504 505 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 506 char *buf) 507 { 508 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 509 int nr = sensor_attr->index; 510 struct vt8231_data *data = vt8231_update_device(dev); 511 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 512 } 513 514 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 515 const char *buf, size_t count) 516 { 517 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 518 int nr = sensor_attr->index; 519 struct i2c_client *client = to_i2c_client(dev); 520 struct vt8231_data *data = i2c_get_clientdata(client); 521 int val = simple_strtoul(buf, NULL, 10); 522 523 down(&data->update_lock); 524 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 525 vt8231_write_value(client, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 526 up(&data->update_lock); 527 return count; 528 } 529 530 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 531 const char *buf, size_t count) 532 { 533 struct i2c_client *client = to_i2c_client(dev); 534 struct vt8231_data *data = i2c_get_clientdata(client); 535 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 536 unsigned long val = simple_strtoul(buf, NULL, 10); 537 int nr = sensor_attr->index; 538 int old = vt8231_read_value(client, VT8231_REG_FANDIV); 539 long min = FAN_FROM_REG(data->fan_min[nr], 540 DIV_FROM_REG(data->fan_div[nr])); 541 542 down(&data->update_lock); 543 switch (val) { 544 case 1: data->fan_div[nr] = 0; break; 545 case 2: data->fan_div[nr] = 1; break; 546 case 4: data->fan_div[nr] = 2; break; 547 case 8: data->fan_div[nr] = 3; break; 548 default: 549 dev_err(&client->dev, "fan_div value %ld not supported." 550 "Choose one of 1, 2, 4 or 8!\n", val); 551 up(&data->update_lock); 552 return -EINVAL; 553 } 554 555 /* Correct the fan minimum speed */ 556 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 557 vt8231_write_value(client, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 558 559 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); 560 vt8231_write_value(client, VT8231_REG_FANDIV, old); 561 up(&data->update_lock); 562 return count; 563 } 564 565 566 #define define_fan_sysfs(offset) \ 567 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 568 show_fan, NULL, offset - 1); \ 569 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 570 show_fan_div, set_fan_div, offset - 1); \ 571 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 572 show_fan_min, set_fan_min, offset - 1) 573 574 define_fan_sysfs(1); 575 define_fan_sysfs(2); 576 577 /* Alarms */ 578 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 579 char *buf) 580 { 581 struct vt8231_data *data = vt8231_update_device(dev); 582 return sprintf(buf, "%d\n", data->alarms); 583 } 584 585 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 586 587 static struct i2c_driver vt8231_driver = { 588 .driver = { 589 .name = "vt8231", 590 }, 591 .attach_adapter = vt8231_detect, 592 .detach_client = vt8231_detach_client, 593 }; 594 595 static struct pci_device_id vt8231_pci_ids[] = { 596 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) }, 597 { 0, } 598 }; 599 600 MODULE_DEVICE_TABLE(pci, vt8231_pci_ids); 601 602 static int __devinit vt8231_pci_probe(struct pci_dev *dev, 603 const struct pci_device_id *id); 604 605 static struct pci_driver vt8231_pci_driver = { 606 .name = "vt8231", 607 .id_table = vt8231_pci_ids, 608 .probe = vt8231_pci_probe, 609 }; 610 611 int vt8231_detect(struct i2c_adapter *adapter) 612 { 613 struct i2c_client *client; 614 struct vt8231_data *data; 615 int err = 0, i; 616 u16 val; 617 618 /* 8231 requires multiple of 256 */ 619 if (force_addr) { 620 isa_address = force_addr & 0xFF00; 621 dev_warn(&adapter->dev, "forcing ISA address 0x%04X\n", 622 isa_address); 623 if (PCIBIOS_SUCCESSFUL != pci_write_config_word(s_bridge, 624 VT8231_BASE_REG, isa_address)) 625 return -ENODEV; 626 } 627 628 if (PCIBIOS_SUCCESSFUL != 629 pci_read_config_word(s_bridge, VT8231_ENABLE_REG, &val)) 630 return -ENODEV; 631 632 if (!(val & 0x0001)) { 633 dev_warn(&adapter->dev, "enabling sensors\n"); 634 if (PCIBIOS_SUCCESSFUL != 635 pci_write_config_word(s_bridge, VT8231_ENABLE_REG, 636 val | 0x0001)) 637 return -ENODEV; 638 } 639 640 /* Reserve the ISA region */ 641 if (!request_region(isa_address, VT8231_EXTENT, 642 vt8231_pci_driver.name)) { 643 dev_err(&adapter->dev, "region 0x%x already in use!\n", 644 isa_address); 645 return -ENODEV; 646 } 647 648 if (!(data = kzalloc(sizeof(struct vt8231_data), GFP_KERNEL))) { 649 err = -ENOMEM; 650 goto exit_release; 651 } 652 653 client = &data->client; 654 i2c_set_clientdata(client, data); 655 client->addr = isa_address; 656 client->adapter = adapter; 657 client->driver = &vt8231_driver; 658 client->dev.parent = &adapter->dev; 659 660 /* Fill in the remaining client fields and put into the global list */ 661 strlcpy(client->name, "vt8231", I2C_NAME_SIZE); 662 663 init_MUTEX(&data->update_lock); 664 665 /* Tell the I2C layer a new client has arrived */ 666 if ((err = i2c_attach_client(client))) 667 goto exit_free; 668 669 vt8231_init_client(client); 670 671 /* Register sysfs hooks */ 672 data->class_dev = hwmon_device_register(&client->dev); 673 if (IS_ERR(data->class_dev)) { 674 err = PTR_ERR(data->class_dev); 675 goto exit_detach; 676 } 677 678 /* Must update device information to find out the config field */ 679 data->uch_config = vt8231_read_value(client, VT8231_REG_UCH_CONFIG); 680 681 for (i = 0; i < ARRAY_SIZE(cfg_info_temp); i++) { 682 if (ISTEMP(i, data->uch_config)) { 683 device_create_file(&client->dev, 684 cfg_info_temp[i].input); 685 device_create_file(&client->dev, cfg_info_temp[i].max); 686 device_create_file(&client->dev, cfg_info_temp[i].min); 687 } 688 } 689 690 for (i = 0; i < ARRAY_SIZE(cfg_info_volt); i++) { 691 if (ISVOLT(i, data->uch_config)) { 692 device_create_file(&client->dev, 693 cfg_info_volt[i].input); 694 device_create_file(&client->dev, cfg_info_volt[i].max); 695 device_create_file(&client->dev, cfg_info_volt[i].min); 696 } 697 } 698 699 device_create_file(&client->dev, &sensor_dev_attr_fan1_input.dev_attr); 700 device_create_file(&client->dev, &sensor_dev_attr_fan2_input.dev_attr); 701 device_create_file(&client->dev, &sensor_dev_attr_fan1_min.dev_attr); 702 device_create_file(&client->dev, &sensor_dev_attr_fan2_min.dev_attr); 703 device_create_file(&client->dev, &sensor_dev_attr_fan1_div.dev_attr); 704 device_create_file(&client->dev, &sensor_dev_attr_fan2_div.dev_attr); 705 706 device_create_file(&client->dev, &dev_attr_alarms); 707 return 0; 708 709 exit_detach: 710 i2c_detach_client(client); 711 exit_free: 712 kfree(data); 713 exit_release: 714 release_region(isa_address, VT8231_EXTENT); 715 return err; 716 } 717 718 static int vt8231_detach_client(struct i2c_client *client) 719 { 720 struct vt8231_data *data = i2c_get_clientdata(client); 721 int err; 722 723 hwmon_device_unregister(data->class_dev); 724 725 if ((err = i2c_detach_client(client))) { 726 return err; 727 } 728 729 release_region(client->addr, VT8231_EXTENT); 730 kfree(data); 731 732 return 0; 733 } 734 735 static void vt8231_init_client(struct i2c_client *client) 736 { 737 vt8231_write_value(client, VT8231_REG_TEMP1_CONFIG, 0); 738 vt8231_write_value(client, VT8231_REG_TEMP2_CONFIG, 0); 739 } 740 741 static struct vt8231_data *vt8231_update_device(struct device *dev) 742 { 743 struct i2c_client *client = to_i2c_client(dev); 744 struct vt8231_data *data = i2c_get_clientdata(client); 745 int i; 746 u16 low; 747 748 down(&data->update_lock); 749 750 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 751 || !data->valid) { 752 for (i = 0; i < 6; i++) { 753 if (ISVOLT(i, data->uch_config)) { 754 data->in[i] = vt8231_read_value(client, 755 regvolt[i]); 756 data->in_min[i] = vt8231_read_value(client, 757 regvoltmin[i]); 758 data->in_max[i] = vt8231_read_value(client, 759 regvoltmax[i]); 760 } 761 } 762 for (i = 0; i < 2; i++) { 763 data->fan[i] = vt8231_read_value(client, 764 VT8231_REG_FAN(i)); 765 data->fan_min[i] = vt8231_read_value(client, 766 VT8231_REG_FAN_MIN(i)); 767 } 768 769 low = vt8231_read_value(client, VT8231_REG_TEMP_LOW01); 770 low = (low >> 6) | ((low & 0x30) >> 2) 771 | (vt8231_read_value(client, VT8231_REG_TEMP_LOW25) << 4); 772 for (i = 0; i < 6; i++) { 773 if (ISTEMP(i, data->uch_config)) { 774 data->temp[i] = (vt8231_read_value(client, 775 regtemp[i]) << 2) 776 | ((low >> (2 * i)) & 0x03); 777 data->temp_max[i] = vt8231_read_value(client, 778 regtempmax[i]); 779 data->temp_min[i] = vt8231_read_value(client, 780 regtempmin[i]); 781 } 782 } 783 784 i = vt8231_read_value(client, VT8231_REG_FANDIV); 785 data->fan_div[0] = (i >> 4) & 0x03; 786 data->fan_div[1] = i >> 6; 787 data->alarms = vt8231_read_value(client, VT8231_REG_ALARM1) | 788 (vt8231_read_value(client, VT8231_REG_ALARM2) << 8); 789 790 /* Set alarm flags correctly */ 791 if (!data->fan[0] && data->fan_min[0]) { 792 data->alarms |= 0x40; 793 } else if (data->fan[0] && !data->fan_min[0]) { 794 data->alarms &= ~0x40; 795 } 796 797 if (!data->fan[1] && data->fan_min[1]) { 798 data->alarms |= 0x80; 799 } else if (data->fan[1] && !data->fan_min[1]) { 800 data->alarms &= ~0x80; 801 } 802 803 data->last_updated = jiffies; 804 data->valid = 1; 805 } 806 807 up(&data->update_lock); 808 809 return data; 810 } 811 812 static int __devinit vt8231_pci_probe(struct pci_dev *dev, 813 const struct pci_device_id *id) 814 { 815 u16 val; 816 817 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG, 818 &val)) 819 return -ENODEV; 820 821 isa_address = val & ~(VT8231_EXTENT - 1); 822 if (isa_address == 0 && force_addr == 0) { 823 dev_err(&dev->dev, "base address not set -\ 824 upgrade BIOS or use force_addr=0xaddr\n"); 825 return -ENODEV; 826 } 827 828 s_bridge = pci_dev_get(dev); 829 830 if (i2c_isa_add_driver(&vt8231_driver)) { 831 pci_dev_put(s_bridge); 832 s_bridge = NULL; 833 } 834 835 /* Always return failure here. This is to allow other drivers to bind 836 * to this pci device. We don't really want to have control over the 837 * pci device, we only wanted to read as few register values from it. 838 */ 839 return -ENODEV; 840 } 841 842 static int __init sm_vt8231_init(void) 843 { 844 return pci_register_driver(&vt8231_pci_driver); 845 } 846 847 static void __exit sm_vt8231_exit(void) 848 { 849 pci_unregister_driver(&vt8231_pci_driver); 850 if (s_bridge != NULL) { 851 i2c_isa_del_driver(&vt8231_driver); 852 pci_dev_put(s_bridge); 853 s_bridge = NULL; 854 } 855 } 856 857 MODULE_AUTHOR("Roger Lucas <roger@planbit.co.uk>"); 858 MODULE_DESCRIPTION("VT8231 sensors"); 859 MODULE_LICENSE("GPL"); 860 861 module_init(sm_vt8231_init); 862 module_exit(sm_vt8231_exit); 863