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 <linux/mutex.h> 39 #include <asm/io.h> 40 41 static int force_addr; 42 module_param(force_addr, int, 0); 43 MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors"); 44 45 /* Device address 46 Note that we can't determine the ISA address until we have initialized 47 our module */ 48 static unsigned short isa_address; 49 50 #define VT8231_EXTENT 0x80 51 #define VT8231_BASE_REG 0x70 52 #define VT8231_ENABLE_REG 0x74 53 54 /* The VT8231 registers 55 56 The reset value for the input channel configuration is used (Reg 0x4A=0x07) 57 which sets the selected inputs marked with '*' below if multiple options are 58 possible: 59 60 Voltage Mode Temperature Mode 61 Sensor Linux Id Linux Id VIA Id 62 -------- -------- -------- ------ 63 CPU Diode N/A temp1 0 64 UIC1 in0 temp2 * 1 65 UIC2 in1 * temp3 2 66 UIC3 in2 * temp4 3 67 UIC4 in3 * temp5 4 68 UIC5 in4 * temp6 5 69 3.3V in5 N/A 70 71 Note that the BIOS may set the configuration register to a different value 72 to match the motherboard configuration. 73 */ 74 75 /* fans numbered 0-1 */ 76 #define VT8231_REG_FAN_MIN(nr) (0x3b + (nr)) 77 #define VT8231_REG_FAN(nr) (0x29 + (nr)) 78 79 /* Voltage inputs numbered 0-5 */ 80 81 static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 }; 82 static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 }; 83 static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 }; 84 85 /* Temperatures are numbered 1-6 according to the Linux kernel specification. 86 ** 87 ** In the VIA datasheet, however, the temperatures are numbered from zero. 88 ** Since it is important that this driver can easily be compared to the VIA 89 ** datasheet, we will use the VIA numbering within this driver and map the 90 ** kernel sysfs device name to the VIA number in the sysfs callback. 91 */ 92 93 #define VT8231_REG_TEMP_LOW01 0x49 94 #define VT8231_REG_TEMP_LOW25 0x4d 95 96 static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 }; 97 static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 }; 98 static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 }; 99 100 #define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210) 101 #define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210) 102 #define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200) 103 104 #define VT8231_REG_CONFIG 0x40 105 #define VT8231_REG_ALARM1 0x41 106 #define VT8231_REG_ALARM2 0x42 107 #define VT8231_REG_FANDIV 0x47 108 #define VT8231_REG_UCH_CONFIG 0x4a 109 #define VT8231_REG_TEMP1_CONFIG 0x4b 110 #define VT8231_REG_TEMP2_CONFIG 0x4c 111 112 /* temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux 113 ** numbering 114 */ 115 #define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \ 116 ((ch_config) >> ((i)+1)) & 0x01) 117 /* voltages 0-5 */ 118 #define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \ 119 !(((ch_config) >> ((i)+2)) & 0x01)) 120 121 #define DIV_FROM_REG(val) (1 << (val)) 122 123 /* NB The values returned here are NOT temperatures. The calibration curves 124 ** for the thermistor curves are board-specific and must go in the 125 ** sensors.conf file. Temperature sensors are actually ten bits, but the 126 ** VIA datasheet only considers the 8 MSBs obtained from the regtemp[] 127 ** register. The temperature value returned should have a magnitude of 3, 128 ** so we use the VIA scaling as the "true" scaling and use the remaining 2 129 ** LSBs as fractional precision. 130 ** 131 ** All the on-chip hardware temperature comparisons for the alarms are only 132 ** 8-bits wide, and compare against the 8 MSBs of the temperature. The bits 133 ** in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are 134 ** ignored. 135 */ 136 137 /******** FAN RPM CONVERSIONS ******** 138 ** This chip saturates back at 0, not at 255 like many the other chips. 139 ** So, 0 means 0 RPM 140 */ 141 static inline u8 FAN_TO_REG(long rpm, int div) 142 { 143 if (rpm == 0) 144 return 0; 145 return SENSORS_LIMIT(1310720 / (rpm * div), 1, 255); 146 } 147 148 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div))) 149 150 struct vt8231_data { 151 struct i2c_client client; 152 struct mutex update_lock; 153 struct class_device *class_dev; 154 char valid; /* !=0 if following fields are valid */ 155 unsigned long last_updated; /* In jiffies */ 156 157 u8 in[6]; /* Register value */ 158 u8 in_max[6]; /* Register value */ 159 u8 in_min[6]; /* Register value */ 160 u16 temp[6]; /* Register value 10 bit, right aligned */ 161 u8 temp_max[6]; /* Register value */ 162 u8 temp_min[6]; /* Register value */ 163 u8 fan[2]; /* Register value */ 164 u8 fan_min[2]; /* Register value */ 165 u8 fan_div[2]; /* Register encoding, shifted right */ 166 u16 alarms; /* Register encoding */ 167 u8 uch_config; 168 }; 169 170 static struct pci_dev *s_bridge; 171 static int vt8231_detect(struct i2c_adapter *adapter); 172 static int vt8231_detach_client(struct i2c_client *client); 173 static struct vt8231_data *vt8231_update_device(struct device *dev); 174 static void vt8231_init_client(struct i2c_client *client); 175 176 static inline int vt8231_read_value(struct i2c_client *client, u8 reg) 177 { 178 return inb_p(client->addr + reg); 179 } 180 181 static inline void vt8231_write_value(struct i2c_client *client, u8 reg, 182 u8 value) 183 { 184 outb_p(value, client->addr + reg); 185 } 186 187 /* following are the sysfs callback functions */ 188 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 189 char *buf) 190 { 191 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 192 int nr = sensor_attr->index; 193 struct vt8231_data *data = vt8231_update_device(dev); 194 195 return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958); 196 } 197 198 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 199 char *buf) 200 { 201 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 202 int nr = sensor_attr->index; 203 struct vt8231_data *data = vt8231_update_device(dev); 204 205 return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958); 206 } 207 208 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 209 char *buf) 210 { 211 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 212 int nr = sensor_attr->index; 213 struct vt8231_data *data = vt8231_update_device(dev); 214 215 return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958)); 216 } 217 218 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 219 const char *buf, size_t count) 220 { 221 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 222 int nr = sensor_attr->index; 223 struct i2c_client *client = to_i2c_client(dev); 224 struct vt8231_data *data = i2c_get_clientdata(client); 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(client, 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 i2c_client *client = to_i2c_client(dev); 240 struct vt8231_data *data = i2c_get_clientdata(client); 241 unsigned long val = simple_strtoul(buf, NULL, 10); 242 243 mutex_lock(&data->update_lock); 244 data->in_max[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255); 245 vt8231_write_value(client, regvoltmax[nr], data->in_max[nr]); 246 mutex_unlock(&data->update_lock); 247 return count; 248 } 249 250 /* Special case for input 5 as this has 3.3V scaling built into the chip */ 251 static ssize_t show_in5(struct device *dev, struct device_attribute *attr, 252 char *buf) 253 { 254 struct vt8231_data *data = vt8231_update_device(dev); 255 256 return sprintf(buf, "%d\n", 257 (((data->in[5] - 3) * 10000 * 54) / (958 * 34))); 258 } 259 260 static ssize_t show_in5_min(struct device *dev, struct device_attribute *attr, 261 char *buf) 262 { 263 struct vt8231_data *data = vt8231_update_device(dev); 264 265 return sprintf(buf, "%d\n", 266 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34))); 267 } 268 269 static ssize_t show_in5_max(struct device *dev, struct device_attribute *attr, 270 char *buf) 271 { 272 struct vt8231_data *data = vt8231_update_device(dev); 273 274 return sprintf(buf, "%d\n", 275 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34))); 276 } 277 278 static ssize_t set_in5_min(struct device *dev, struct device_attribute *attr, 279 const char *buf, size_t count) 280 { 281 struct i2c_client *client = to_i2c_client(dev); 282 struct vt8231_data *data = i2c_get_clientdata(client); 283 unsigned long val = simple_strtoul(buf, NULL, 10); 284 285 mutex_lock(&data->update_lock); 286 data->in_min[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3, 287 0, 255); 288 vt8231_write_value(client, regvoltmin[5], data->in_min[5]); 289 mutex_unlock(&data->update_lock); 290 return count; 291 } 292 293 static ssize_t set_in5_max(struct device *dev, struct device_attribute *attr, 294 const char *buf, size_t count) 295 { 296 struct i2c_client *client = to_i2c_client(dev); 297 struct vt8231_data *data = i2c_get_clientdata(client); 298 unsigned long val = simple_strtoul(buf, NULL, 10); 299 300 mutex_lock(&data->update_lock); 301 data->in_max[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3, 302 0, 255); 303 vt8231_write_value(client, regvoltmax[5], data->in_max[5]); 304 mutex_unlock(&data->update_lock); 305 return count; 306 } 307 308 #define define_voltage_sysfs(offset) \ 309 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 310 show_in, NULL, offset); \ 311 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 312 show_in_min, set_in_min, offset); \ 313 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 314 show_in_max, set_in_max, offset) 315 316 define_voltage_sysfs(0); 317 define_voltage_sysfs(1); 318 define_voltage_sysfs(2); 319 define_voltage_sysfs(3); 320 define_voltage_sysfs(4); 321 322 static DEVICE_ATTR(in5_input, S_IRUGO, show_in5, NULL); 323 static DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR, show_in5_min, set_in5_min); 324 static DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR, show_in5_max, set_in5_max); 325 326 /* Temperatures */ 327 static ssize_t show_temp0(struct device *dev, struct device_attribute *attr, 328 char *buf) 329 { 330 struct vt8231_data *data = vt8231_update_device(dev); 331 return sprintf(buf, "%d\n", data->temp[0] * 250); 332 } 333 334 static ssize_t show_temp0_max(struct device *dev, struct device_attribute *attr, 335 char *buf) 336 { 337 struct vt8231_data *data = vt8231_update_device(dev); 338 return sprintf(buf, "%d\n", data->temp_max[0] * 1000); 339 } 340 341 static ssize_t show_temp0_min(struct device *dev, struct device_attribute *attr, 342 char *buf) 343 { 344 struct vt8231_data *data = vt8231_update_device(dev); 345 return sprintf(buf, "%d\n", data->temp_min[0] * 1000); 346 } 347 348 static ssize_t set_temp0_max(struct device *dev, struct device_attribute *attr, 349 const char *buf, size_t count) 350 { 351 struct i2c_client *client = to_i2c_client(dev); 352 struct vt8231_data *data = i2c_get_clientdata(client); 353 int val = simple_strtol(buf, NULL, 10); 354 355 mutex_lock(&data->update_lock); 356 data->temp_max[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255); 357 vt8231_write_value(client, regtempmax[0], data->temp_max[0]); 358 mutex_unlock(&data->update_lock); 359 return count; 360 } 361 static ssize_t set_temp0_min(struct device *dev, struct device_attribute *attr, 362 const char *buf, size_t count) 363 { 364 struct i2c_client *client = to_i2c_client(dev); 365 struct vt8231_data *data = i2c_get_clientdata(client); 366 int val = simple_strtol(buf, NULL, 10); 367 368 mutex_lock(&data->update_lock); 369 data->temp_min[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255); 370 vt8231_write_value(client, regtempmin[0], data->temp_min[0]); 371 mutex_unlock(&data->update_lock); 372 return count; 373 } 374 375 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 376 char *buf) 377 { 378 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 379 int nr = sensor_attr->index; 380 struct vt8231_data *data = vt8231_update_device(dev); 381 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 382 } 383 384 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 385 char *buf) 386 { 387 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 388 int nr = sensor_attr->index; 389 struct vt8231_data *data = vt8231_update_device(dev); 390 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr])); 391 } 392 393 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 394 char *buf) 395 { 396 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 397 int nr = sensor_attr->index; 398 struct vt8231_data *data = vt8231_update_device(dev); 399 return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr])); 400 } 401 402 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 403 const char *buf, size_t count) 404 { 405 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 406 int nr = sensor_attr->index; 407 struct i2c_client *client = to_i2c_client(dev); 408 struct vt8231_data *data = i2c_get_clientdata(client); 409 int val = simple_strtol(buf, NULL, 10); 410 411 mutex_lock(&data->update_lock); 412 data->temp_max[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255); 413 vt8231_write_value(client, regtempmax[nr], data->temp_max[nr]); 414 mutex_unlock(&data->update_lock); 415 return count; 416 } 417 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 418 const char *buf, size_t count) 419 { 420 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 421 int nr = sensor_attr->index; 422 struct i2c_client *client = to_i2c_client(dev); 423 struct vt8231_data *data = i2c_get_clientdata(client); 424 int val = simple_strtol(buf, NULL, 10); 425 426 mutex_lock(&data->update_lock); 427 data->temp_min[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255); 428 vt8231_write_value(client, regtempmin[nr], data->temp_min[nr]); 429 mutex_unlock(&data->update_lock); 430 return count; 431 } 432 433 /* Note that these map the Linux temperature sensor numbering (1-6) to the VIA 434 ** temperature sensor numbering (0-5) 435 */ 436 #define define_temperature_sysfs(offset) \ 437 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 438 show_temp, NULL, offset - 1); \ 439 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 440 show_temp_max, set_temp_max, offset - 1); \ 441 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ 442 show_temp_min, set_temp_min, offset - 1) 443 444 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp0, NULL); 445 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp0_max, set_temp0_max); 446 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, show_temp0_min, set_temp0_min); 447 448 define_temperature_sysfs(2); 449 define_temperature_sysfs(3); 450 define_temperature_sysfs(4); 451 define_temperature_sysfs(5); 452 define_temperature_sysfs(6); 453 454 #define CFG_INFO_TEMP(id) { &sensor_dev_attr_temp##id##_input.dev_attr, \ 455 &sensor_dev_attr_temp##id##_max_hyst.dev_attr, \ 456 &sensor_dev_attr_temp##id##_max.dev_attr } 457 #define CFG_INFO_VOLT(id) { &sensor_dev_attr_in##id##_input.dev_attr, \ 458 &sensor_dev_attr_in##id##_min.dev_attr, \ 459 &sensor_dev_attr_in##id##_max.dev_attr } 460 461 struct str_device_attr_table { 462 struct device_attribute *input; 463 struct device_attribute *min; 464 struct device_attribute *max; 465 }; 466 467 static struct str_device_attr_table cfg_info_temp[] = { 468 { &dev_attr_temp1_input, &dev_attr_temp1_max_hyst, &dev_attr_temp1_max }, 469 CFG_INFO_TEMP(2), 470 CFG_INFO_TEMP(3), 471 CFG_INFO_TEMP(4), 472 CFG_INFO_TEMP(5), 473 CFG_INFO_TEMP(6) 474 }; 475 476 static struct str_device_attr_table cfg_info_volt[] = { 477 CFG_INFO_VOLT(0), 478 CFG_INFO_VOLT(1), 479 CFG_INFO_VOLT(2), 480 CFG_INFO_VOLT(3), 481 CFG_INFO_VOLT(4), 482 { &dev_attr_in5_input, &dev_attr_in5_min, &dev_attr_in5_max } 483 }; 484 485 /* Fans */ 486 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 487 char *buf) 488 { 489 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 490 int nr = sensor_attr->index; 491 struct vt8231_data *data = vt8231_update_device(dev); 492 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 493 DIV_FROM_REG(data->fan_div[nr]))); 494 } 495 496 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 497 char *buf) 498 { 499 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 500 int nr = sensor_attr->index; 501 struct vt8231_data *data = vt8231_update_device(dev); 502 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 503 DIV_FROM_REG(data->fan_div[nr]))); 504 } 505 506 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 507 char *buf) 508 { 509 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 510 int nr = sensor_attr->index; 511 struct vt8231_data *data = vt8231_update_device(dev); 512 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 513 } 514 515 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 516 const char *buf, size_t count) 517 { 518 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 519 int nr = sensor_attr->index; 520 struct i2c_client *client = to_i2c_client(dev); 521 struct vt8231_data *data = i2c_get_clientdata(client); 522 int val = simple_strtoul(buf, NULL, 10); 523 524 mutex_lock(&data->update_lock); 525 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 526 vt8231_write_value(client, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 527 mutex_unlock(&data->update_lock); 528 return count; 529 } 530 531 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 532 const char *buf, size_t count) 533 { 534 struct i2c_client *client = to_i2c_client(dev); 535 struct vt8231_data *data = i2c_get_clientdata(client); 536 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 537 unsigned long val = simple_strtoul(buf, NULL, 10); 538 int nr = sensor_attr->index; 539 int old = vt8231_read_value(client, VT8231_REG_FANDIV); 540 long min = FAN_FROM_REG(data->fan_min[nr], 541 DIV_FROM_REG(data->fan_div[nr])); 542 543 mutex_lock(&data->update_lock); 544 switch (val) { 545 case 1: data->fan_div[nr] = 0; break; 546 case 2: data->fan_div[nr] = 1; break; 547 case 4: data->fan_div[nr] = 2; break; 548 case 8: data->fan_div[nr] = 3; break; 549 default: 550 dev_err(&client->dev, "fan_div value %ld not supported." 551 "Choose one of 1, 2, 4 or 8!\n", val); 552 mutex_unlock(&data->update_lock); 553 return -EINVAL; 554 } 555 556 /* Correct the fan minimum speed */ 557 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 558 vt8231_write_value(client, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 559 560 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); 561 vt8231_write_value(client, VT8231_REG_FANDIV, old); 562 mutex_unlock(&data->update_lock); 563 return count; 564 } 565 566 567 #define define_fan_sysfs(offset) \ 568 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 569 show_fan, NULL, offset - 1); \ 570 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 571 show_fan_div, set_fan_div, offset - 1); \ 572 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 573 show_fan_min, set_fan_min, offset - 1) 574 575 define_fan_sysfs(1); 576 define_fan_sysfs(2); 577 578 /* Alarms */ 579 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 580 char *buf) 581 { 582 struct vt8231_data *data = vt8231_update_device(dev); 583 return sprintf(buf, "%d\n", data->alarms); 584 } 585 586 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 587 588 static struct i2c_driver vt8231_driver = { 589 .driver = { 590 .name = "vt8231", 591 }, 592 .attach_adapter = vt8231_detect, 593 .detach_client = vt8231_detach_client, 594 }; 595 596 static struct pci_device_id vt8231_pci_ids[] = { 597 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) }, 598 { 0, } 599 }; 600 601 MODULE_DEVICE_TABLE(pci, vt8231_pci_ids); 602 603 static int __devinit vt8231_pci_probe(struct pci_dev *dev, 604 const struct pci_device_id *id); 605 606 static struct pci_driver vt8231_pci_driver = { 607 .name = "vt8231", 608 .id_table = vt8231_pci_ids, 609 .probe = vt8231_pci_probe, 610 }; 611 612 int vt8231_detect(struct i2c_adapter *adapter) 613 { 614 struct i2c_client *client; 615 struct vt8231_data *data; 616 int err = 0, i; 617 u16 val; 618 619 /* 8231 requires multiple of 256 */ 620 if (force_addr) { 621 isa_address = force_addr & 0xFF00; 622 dev_warn(&adapter->dev, "forcing ISA address 0x%04X\n", 623 isa_address); 624 if (PCIBIOS_SUCCESSFUL != pci_write_config_word(s_bridge, 625 VT8231_BASE_REG, isa_address)) 626 return -ENODEV; 627 } 628 629 if (PCIBIOS_SUCCESSFUL != 630 pci_read_config_word(s_bridge, VT8231_ENABLE_REG, &val)) 631 return -ENODEV; 632 633 if (!(val & 0x0001)) { 634 dev_warn(&adapter->dev, "enabling sensors\n"); 635 if (PCIBIOS_SUCCESSFUL != 636 pci_write_config_word(s_bridge, VT8231_ENABLE_REG, 637 val | 0x0001)) 638 return -ENODEV; 639 } 640 641 /* Reserve the ISA region */ 642 if (!request_region(isa_address, VT8231_EXTENT, 643 vt8231_pci_driver.name)) { 644 dev_err(&adapter->dev, "region 0x%x already in use!\n", 645 isa_address); 646 return -ENODEV; 647 } 648 649 if (!(data = kzalloc(sizeof(struct vt8231_data), GFP_KERNEL))) { 650 err = -ENOMEM; 651 goto exit_release; 652 } 653 654 client = &data->client; 655 i2c_set_clientdata(client, data); 656 client->addr = isa_address; 657 client->adapter = adapter; 658 client->driver = &vt8231_driver; 659 client->dev.parent = &adapter->dev; 660 661 /* Fill in the remaining client fields and put into the global list */ 662 strlcpy(client->name, "vt8231", I2C_NAME_SIZE); 663 664 mutex_init(&data->update_lock); 665 666 /* Tell the I2C layer a new client has arrived */ 667 if ((err = i2c_attach_client(client))) 668 goto exit_free; 669 670 vt8231_init_client(client); 671 672 /* Register sysfs hooks */ 673 data->class_dev = hwmon_device_register(&client->dev); 674 if (IS_ERR(data->class_dev)) { 675 err = PTR_ERR(data->class_dev); 676 goto exit_detach; 677 } 678 679 /* Must update device information to find out the config field */ 680 data->uch_config = vt8231_read_value(client, VT8231_REG_UCH_CONFIG); 681 682 for (i = 0; i < ARRAY_SIZE(cfg_info_temp); i++) { 683 if (ISTEMP(i, data->uch_config)) { 684 device_create_file(&client->dev, 685 cfg_info_temp[i].input); 686 device_create_file(&client->dev, cfg_info_temp[i].max); 687 device_create_file(&client->dev, cfg_info_temp[i].min); 688 } 689 } 690 691 for (i = 0; i < ARRAY_SIZE(cfg_info_volt); i++) { 692 if (ISVOLT(i, data->uch_config)) { 693 device_create_file(&client->dev, 694 cfg_info_volt[i].input); 695 device_create_file(&client->dev, cfg_info_volt[i].max); 696 device_create_file(&client->dev, cfg_info_volt[i].min); 697 } 698 } 699 700 device_create_file(&client->dev, &sensor_dev_attr_fan1_input.dev_attr); 701 device_create_file(&client->dev, &sensor_dev_attr_fan2_input.dev_attr); 702 device_create_file(&client->dev, &sensor_dev_attr_fan1_min.dev_attr); 703 device_create_file(&client->dev, &sensor_dev_attr_fan2_min.dev_attr); 704 device_create_file(&client->dev, &sensor_dev_attr_fan1_div.dev_attr); 705 device_create_file(&client->dev, &sensor_dev_attr_fan2_div.dev_attr); 706 707 device_create_file(&client->dev, &dev_attr_alarms); 708 return 0; 709 710 exit_detach: 711 i2c_detach_client(client); 712 exit_free: 713 kfree(data); 714 exit_release: 715 release_region(isa_address, VT8231_EXTENT); 716 return err; 717 } 718 719 static int vt8231_detach_client(struct i2c_client *client) 720 { 721 struct vt8231_data *data = i2c_get_clientdata(client); 722 int err; 723 724 hwmon_device_unregister(data->class_dev); 725 726 if ((err = i2c_detach_client(client))) { 727 return err; 728 } 729 730 release_region(client->addr, VT8231_EXTENT); 731 kfree(data); 732 733 return 0; 734 } 735 736 static void vt8231_init_client(struct i2c_client *client) 737 { 738 vt8231_write_value(client, VT8231_REG_TEMP1_CONFIG, 0); 739 vt8231_write_value(client, VT8231_REG_TEMP2_CONFIG, 0); 740 } 741 742 static struct vt8231_data *vt8231_update_device(struct device *dev) 743 { 744 struct i2c_client *client = to_i2c_client(dev); 745 struct vt8231_data *data = i2c_get_clientdata(client); 746 int i; 747 u16 low; 748 749 mutex_lock(&data->update_lock); 750 751 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 752 || !data->valid) { 753 for (i = 0; i < 6; i++) { 754 if (ISVOLT(i, data->uch_config)) { 755 data->in[i] = vt8231_read_value(client, 756 regvolt[i]); 757 data->in_min[i] = vt8231_read_value(client, 758 regvoltmin[i]); 759 data->in_max[i] = vt8231_read_value(client, 760 regvoltmax[i]); 761 } 762 } 763 for (i = 0; i < 2; i++) { 764 data->fan[i] = vt8231_read_value(client, 765 VT8231_REG_FAN(i)); 766 data->fan_min[i] = vt8231_read_value(client, 767 VT8231_REG_FAN_MIN(i)); 768 } 769 770 low = vt8231_read_value(client, VT8231_REG_TEMP_LOW01); 771 low = (low >> 6) | ((low & 0x30) >> 2) 772 | (vt8231_read_value(client, VT8231_REG_TEMP_LOW25) << 4); 773 for (i = 0; i < 6; i++) { 774 if (ISTEMP(i, data->uch_config)) { 775 data->temp[i] = (vt8231_read_value(client, 776 regtemp[i]) << 2) 777 | ((low >> (2 * i)) & 0x03); 778 data->temp_max[i] = vt8231_read_value(client, 779 regtempmax[i]); 780 data->temp_min[i] = vt8231_read_value(client, 781 regtempmin[i]); 782 } 783 } 784 785 i = vt8231_read_value(client, VT8231_REG_FANDIV); 786 data->fan_div[0] = (i >> 4) & 0x03; 787 data->fan_div[1] = i >> 6; 788 data->alarms = vt8231_read_value(client, VT8231_REG_ALARM1) | 789 (vt8231_read_value(client, VT8231_REG_ALARM2) << 8); 790 791 /* Set alarm flags correctly */ 792 if (!data->fan[0] && data->fan_min[0]) { 793 data->alarms |= 0x40; 794 } else if (data->fan[0] && !data->fan_min[0]) { 795 data->alarms &= ~0x40; 796 } 797 798 if (!data->fan[1] && data->fan_min[1]) { 799 data->alarms |= 0x80; 800 } else if (data->fan[1] && !data->fan_min[1]) { 801 data->alarms &= ~0x80; 802 } 803 804 data->last_updated = jiffies; 805 data->valid = 1; 806 } 807 808 mutex_unlock(&data->update_lock); 809 810 return data; 811 } 812 813 static int __devinit vt8231_pci_probe(struct pci_dev *dev, 814 const struct pci_device_id *id) 815 { 816 u16 val; 817 818 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG, 819 &val)) 820 return -ENODEV; 821 822 isa_address = val & ~(VT8231_EXTENT - 1); 823 if (isa_address == 0 && force_addr == 0) { 824 dev_err(&dev->dev, "base address not set -\ 825 upgrade BIOS or use force_addr=0xaddr\n"); 826 return -ENODEV; 827 } 828 829 s_bridge = pci_dev_get(dev); 830 831 if (i2c_isa_add_driver(&vt8231_driver)) { 832 pci_dev_put(s_bridge); 833 s_bridge = NULL; 834 } 835 836 /* Always return failure here. This is to allow other drivers to bind 837 * to this pci device. We don't really want to have control over the 838 * pci device, we only wanted to read as few register values from it. 839 */ 840 return -ENODEV; 841 } 842 843 static int __init sm_vt8231_init(void) 844 { 845 return pci_register_driver(&vt8231_pci_driver); 846 } 847 848 static void __exit sm_vt8231_exit(void) 849 { 850 pci_unregister_driver(&vt8231_pci_driver); 851 if (s_bridge != NULL) { 852 i2c_isa_del_driver(&vt8231_driver); 853 pci_dev_put(s_bridge); 854 s_bridge = NULL; 855 } 856 } 857 858 MODULE_AUTHOR("Roger Lucas <roger@planbit.co.uk>"); 859 MODULE_DESCRIPTION("VT8231 sensors"); 860 MODULE_LICENSE("GPL"); 861 862 module_init(sm_vt8231_init); 863 module_exit(sm_vt8231_exit); 864