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 /* Fans */ 455 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 456 char *buf) 457 { 458 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 459 int nr = sensor_attr->index; 460 struct vt8231_data *data = vt8231_update_device(dev); 461 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], 462 DIV_FROM_REG(data->fan_div[nr]))); 463 } 464 465 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 466 char *buf) 467 { 468 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 469 int nr = sensor_attr->index; 470 struct vt8231_data *data = vt8231_update_device(dev); 471 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 472 DIV_FROM_REG(data->fan_div[nr]))); 473 } 474 475 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, 476 char *buf) 477 { 478 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 479 int nr = sensor_attr->index; 480 struct vt8231_data *data = vt8231_update_device(dev); 481 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 482 } 483 484 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 485 const char *buf, size_t count) 486 { 487 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 488 int nr = sensor_attr->index; 489 struct i2c_client *client = to_i2c_client(dev); 490 struct vt8231_data *data = i2c_get_clientdata(client); 491 int val = simple_strtoul(buf, NULL, 10); 492 493 mutex_lock(&data->update_lock); 494 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 495 vt8231_write_value(client, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 496 mutex_unlock(&data->update_lock); 497 return count; 498 } 499 500 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 501 const char *buf, size_t count) 502 { 503 struct i2c_client *client = to_i2c_client(dev); 504 struct vt8231_data *data = i2c_get_clientdata(client); 505 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 506 unsigned long val = simple_strtoul(buf, NULL, 10); 507 int nr = sensor_attr->index; 508 int old = vt8231_read_value(client, VT8231_REG_FANDIV); 509 long min = FAN_FROM_REG(data->fan_min[nr], 510 DIV_FROM_REG(data->fan_div[nr])); 511 512 mutex_lock(&data->update_lock); 513 switch (val) { 514 case 1: data->fan_div[nr] = 0; break; 515 case 2: data->fan_div[nr] = 1; break; 516 case 4: data->fan_div[nr] = 2; break; 517 case 8: data->fan_div[nr] = 3; break; 518 default: 519 dev_err(&client->dev, "fan_div value %ld not supported." 520 "Choose one of 1, 2, 4 or 8!\n", val); 521 mutex_unlock(&data->update_lock); 522 return -EINVAL; 523 } 524 525 /* Correct the fan minimum speed */ 526 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 527 vt8231_write_value(client, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); 528 529 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); 530 vt8231_write_value(client, VT8231_REG_FANDIV, old); 531 mutex_unlock(&data->update_lock); 532 return count; 533 } 534 535 536 #define define_fan_sysfs(offset) \ 537 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 538 show_fan, NULL, offset - 1); \ 539 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 540 show_fan_div, set_fan_div, offset - 1); \ 541 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 542 show_fan_min, set_fan_min, offset - 1) 543 544 define_fan_sysfs(1); 545 define_fan_sysfs(2); 546 547 /* Alarms */ 548 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, 549 char *buf) 550 { 551 struct vt8231_data *data = vt8231_update_device(dev); 552 return sprintf(buf, "%d\n", data->alarms); 553 } 554 555 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 556 557 static struct attribute *vt8231_attributes_temps[6][4] = { 558 { 559 &dev_attr_temp1_input.attr, 560 &dev_attr_temp1_max_hyst.attr, 561 &dev_attr_temp1_max.attr, 562 NULL 563 }, { 564 &sensor_dev_attr_temp2_input.dev_attr.attr, 565 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, 566 &sensor_dev_attr_temp2_max.dev_attr.attr, 567 NULL 568 }, { 569 &sensor_dev_attr_temp3_input.dev_attr.attr, 570 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, 571 &sensor_dev_attr_temp3_max.dev_attr.attr, 572 NULL 573 }, { 574 &sensor_dev_attr_temp4_input.dev_attr.attr, 575 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, 576 &sensor_dev_attr_temp4_max.dev_attr.attr, 577 NULL 578 }, { 579 &sensor_dev_attr_temp5_input.dev_attr.attr, 580 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, 581 &sensor_dev_attr_temp5_max.dev_attr.attr, 582 NULL 583 }, { 584 &sensor_dev_attr_temp6_input.dev_attr.attr, 585 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr, 586 &sensor_dev_attr_temp6_max.dev_attr.attr, 587 NULL 588 } 589 }; 590 591 static const struct attribute_group vt8231_group_temps[6] = { 592 { .attrs = vt8231_attributes_temps[0] }, 593 { .attrs = vt8231_attributes_temps[1] }, 594 { .attrs = vt8231_attributes_temps[2] }, 595 { .attrs = vt8231_attributes_temps[3] }, 596 { .attrs = vt8231_attributes_temps[4] }, 597 { .attrs = vt8231_attributes_temps[5] }, 598 }; 599 600 static struct attribute *vt8231_attributes_volts[6][4] = { 601 { 602 &sensor_dev_attr_in0_input.dev_attr.attr, 603 &sensor_dev_attr_in0_min.dev_attr.attr, 604 &sensor_dev_attr_in0_max.dev_attr.attr, 605 NULL 606 }, { 607 &sensor_dev_attr_in1_input.dev_attr.attr, 608 &sensor_dev_attr_in1_min.dev_attr.attr, 609 &sensor_dev_attr_in1_max.dev_attr.attr, 610 NULL 611 }, { 612 &sensor_dev_attr_in2_input.dev_attr.attr, 613 &sensor_dev_attr_in2_min.dev_attr.attr, 614 &sensor_dev_attr_in2_max.dev_attr.attr, 615 NULL 616 }, { 617 &sensor_dev_attr_in3_input.dev_attr.attr, 618 &sensor_dev_attr_in3_min.dev_attr.attr, 619 &sensor_dev_attr_in3_max.dev_attr.attr, 620 NULL 621 }, { 622 &sensor_dev_attr_in4_input.dev_attr.attr, 623 &sensor_dev_attr_in4_min.dev_attr.attr, 624 &sensor_dev_attr_in4_max.dev_attr.attr, 625 NULL 626 }, { 627 &dev_attr_in5_input.attr, 628 &dev_attr_in5_min.attr, 629 &dev_attr_in5_max.attr, 630 NULL 631 } 632 }; 633 634 static const struct attribute_group vt8231_group_volts[6] = { 635 { .attrs = vt8231_attributes_volts[0] }, 636 { .attrs = vt8231_attributes_volts[1] }, 637 { .attrs = vt8231_attributes_volts[2] }, 638 { .attrs = vt8231_attributes_volts[3] }, 639 { .attrs = vt8231_attributes_volts[4] }, 640 { .attrs = vt8231_attributes_volts[5] }, 641 }; 642 643 static struct attribute *vt8231_attributes[] = { 644 &sensor_dev_attr_fan1_input.dev_attr.attr, 645 &sensor_dev_attr_fan2_input.dev_attr.attr, 646 &sensor_dev_attr_fan1_min.dev_attr.attr, 647 &sensor_dev_attr_fan2_min.dev_attr.attr, 648 &sensor_dev_attr_fan1_div.dev_attr.attr, 649 &sensor_dev_attr_fan2_div.dev_attr.attr, 650 &dev_attr_alarms.attr, 651 NULL 652 }; 653 654 static const struct attribute_group vt8231_group = { 655 .attrs = vt8231_attributes, 656 }; 657 658 static struct i2c_driver vt8231_driver = { 659 .driver = { 660 .owner = THIS_MODULE, 661 .name = "vt8231", 662 }, 663 .attach_adapter = vt8231_detect, 664 .detach_client = vt8231_detach_client, 665 }; 666 667 static struct pci_device_id vt8231_pci_ids[] = { 668 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) }, 669 { 0, } 670 }; 671 672 MODULE_DEVICE_TABLE(pci, vt8231_pci_ids); 673 674 static int __devinit vt8231_pci_probe(struct pci_dev *dev, 675 const struct pci_device_id *id); 676 677 static struct pci_driver vt8231_pci_driver = { 678 .name = "vt8231", 679 .id_table = vt8231_pci_ids, 680 .probe = vt8231_pci_probe, 681 }; 682 683 int vt8231_detect(struct i2c_adapter *adapter) 684 { 685 struct i2c_client *client; 686 struct vt8231_data *data; 687 int err = 0, i; 688 u16 val; 689 690 /* 8231 requires multiple of 256 */ 691 if (force_addr) { 692 isa_address = force_addr & 0xFF00; 693 dev_warn(&adapter->dev, "forcing ISA address 0x%04X\n", 694 isa_address); 695 if (PCIBIOS_SUCCESSFUL != pci_write_config_word(s_bridge, 696 VT8231_BASE_REG, isa_address)) 697 return -ENODEV; 698 } 699 700 if (PCIBIOS_SUCCESSFUL != 701 pci_read_config_word(s_bridge, VT8231_ENABLE_REG, &val)) 702 return -ENODEV; 703 704 if (!(val & 0x0001)) { 705 dev_warn(&adapter->dev, "enabling sensors\n"); 706 if (PCIBIOS_SUCCESSFUL != 707 pci_write_config_word(s_bridge, VT8231_ENABLE_REG, 708 val | 0x0001)) 709 return -ENODEV; 710 } 711 712 /* Reserve the ISA region */ 713 if (!request_region(isa_address, VT8231_EXTENT, 714 vt8231_pci_driver.name)) { 715 dev_err(&adapter->dev, "region 0x%x already in use!\n", 716 isa_address); 717 return -ENODEV; 718 } 719 720 if (!(data = kzalloc(sizeof(struct vt8231_data), GFP_KERNEL))) { 721 err = -ENOMEM; 722 goto exit_release; 723 } 724 725 client = &data->client; 726 i2c_set_clientdata(client, data); 727 client->addr = isa_address; 728 client->adapter = adapter; 729 client->driver = &vt8231_driver; 730 client->dev.parent = &adapter->dev; 731 732 /* Fill in the remaining client fields and put into the global list */ 733 strlcpy(client->name, "vt8231", I2C_NAME_SIZE); 734 735 mutex_init(&data->update_lock); 736 737 /* Tell the I2C layer a new client has arrived */ 738 if ((err = i2c_attach_client(client))) 739 goto exit_free; 740 741 vt8231_init_client(client); 742 743 /* Register sysfs hooks */ 744 if ((err = sysfs_create_group(&client->dev.kobj, &vt8231_group))) 745 goto exit_detach; 746 747 /* Must update device information to find out the config field */ 748 data->uch_config = vt8231_read_value(client, VT8231_REG_UCH_CONFIG); 749 750 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) { 751 if (ISTEMP(i, data->uch_config)) { 752 if ((err = sysfs_create_group(&client->dev.kobj, 753 &vt8231_group_temps[i]))) 754 goto exit_remove_files; 755 } 756 } 757 758 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) { 759 if (ISVOLT(i, data->uch_config)) { 760 if ((err = sysfs_create_group(&client->dev.kobj, 761 &vt8231_group_volts[i]))) 762 goto exit_remove_files; 763 } 764 } 765 766 data->class_dev = hwmon_device_register(&client->dev); 767 if (IS_ERR(data->class_dev)) { 768 err = PTR_ERR(data->class_dev); 769 goto exit_remove_files; 770 } 771 return 0; 772 773 exit_remove_files: 774 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 775 sysfs_remove_group(&client->dev.kobj, &vt8231_group_volts[i]); 776 777 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 778 sysfs_remove_group(&client->dev.kobj, &vt8231_group_temps[i]); 779 780 sysfs_remove_group(&client->dev.kobj, &vt8231_group); 781 exit_detach: 782 i2c_detach_client(client); 783 exit_free: 784 kfree(data); 785 exit_release: 786 release_region(isa_address, VT8231_EXTENT); 787 return err; 788 } 789 790 static int vt8231_detach_client(struct i2c_client *client) 791 { 792 struct vt8231_data *data = i2c_get_clientdata(client); 793 int err, i; 794 795 hwmon_device_unregister(data->class_dev); 796 797 for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) 798 sysfs_remove_group(&client->dev.kobj, &vt8231_group_volts[i]); 799 800 for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) 801 sysfs_remove_group(&client->dev.kobj, &vt8231_group_temps[i]); 802 803 sysfs_remove_group(&client->dev.kobj, &vt8231_group); 804 805 if ((err = i2c_detach_client(client))) { 806 return err; 807 } 808 809 release_region(client->addr, VT8231_EXTENT); 810 kfree(data); 811 812 return 0; 813 } 814 815 static void vt8231_init_client(struct i2c_client *client) 816 { 817 vt8231_write_value(client, VT8231_REG_TEMP1_CONFIG, 0); 818 vt8231_write_value(client, VT8231_REG_TEMP2_CONFIG, 0); 819 } 820 821 static struct vt8231_data *vt8231_update_device(struct device *dev) 822 { 823 struct i2c_client *client = to_i2c_client(dev); 824 struct vt8231_data *data = i2c_get_clientdata(client); 825 int i; 826 u16 low; 827 828 mutex_lock(&data->update_lock); 829 830 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 831 || !data->valid) { 832 for (i = 0; i < 6; i++) { 833 if (ISVOLT(i, data->uch_config)) { 834 data->in[i] = vt8231_read_value(client, 835 regvolt[i]); 836 data->in_min[i] = vt8231_read_value(client, 837 regvoltmin[i]); 838 data->in_max[i] = vt8231_read_value(client, 839 regvoltmax[i]); 840 } 841 } 842 for (i = 0; i < 2; i++) { 843 data->fan[i] = vt8231_read_value(client, 844 VT8231_REG_FAN(i)); 845 data->fan_min[i] = vt8231_read_value(client, 846 VT8231_REG_FAN_MIN(i)); 847 } 848 849 low = vt8231_read_value(client, VT8231_REG_TEMP_LOW01); 850 low = (low >> 6) | ((low & 0x30) >> 2) 851 | (vt8231_read_value(client, VT8231_REG_TEMP_LOW25) << 4); 852 for (i = 0; i < 6; i++) { 853 if (ISTEMP(i, data->uch_config)) { 854 data->temp[i] = (vt8231_read_value(client, 855 regtemp[i]) << 2) 856 | ((low >> (2 * i)) & 0x03); 857 data->temp_max[i] = vt8231_read_value(client, 858 regtempmax[i]); 859 data->temp_min[i] = vt8231_read_value(client, 860 regtempmin[i]); 861 } 862 } 863 864 i = vt8231_read_value(client, VT8231_REG_FANDIV); 865 data->fan_div[0] = (i >> 4) & 0x03; 866 data->fan_div[1] = i >> 6; 867 data->alarms = vt8231_read_value(client, VT8231_REG_ALARM1) | 868 (vt8231_read_value(client, VT8231_REG_ALARM2) << 8); 869 870 /* Set alarm flags correctly */ 871 if (!data->fan[0] && data->fan_min[0]) { 872 data->alarms |= 0x40; 873 } else if (data->fan[0] && !data->fan_min[0]) { 874 data->alarms &= ~0x40; 875 } 876 877 if (!data->fan[1] && data->fan_min[1]) { 878 data->alarms |= 0x80; 879 } else if (data->fan[1] && !data->fan_min[1]) { 880 data->alarms &= ~0x80; 881 } 882 883 data->last_updated = jiffies; 884 data->valid = 1; 885 } 886 887 mutex_unlock(&data->update_lock); 888 889 return data; 890 } 891 892 static int __devinit vt8231_pci_probe(struct pci_dev *dev, 893 const struct pci_device_id *id) 894 { 895 u16 val; 896 897 if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG, 898 &val)) 899 return -ENODEV; 900 901 isa_address = val & ~(VT8231_EXTENT - 1); 902 if (isa_address == 0 && force_addr == 0) { 903 dev_err(&dev->dev, "base address not set -\ 904 upgrade BIOS or use force_addr=0xaddr\n"); 905 return -ENODEV; 906 } 907 908 s_bridge = pci_dev_get(dev); 909 910 if (i2c_isa_add_driver(&vt8231_driver)) { 911 pci_dev_put(s_bridge); 912 s_bridge = NULL; 913 } 914 915 /* Always return failure here. This is to allow other drivers to bind 916 * to this pci device. We don't really want to have control over the 917 * pci device, we only wanted to read as few register values from it. 918 */ 919 return -ENODEV; 920 } 921 922 static int __init sm_vt8231_init(void) 923 { 924 return pci_register_driver(&vt8231_pci_driver); 925 } 926 927 static void __exit sm_vt8231_exit(void) 928 { 929 pci_unregister_driver(&vt8231_pci_driver); 930 if (s_bridge != NULL) { 931 i2c_isa_del_driver(&vt8231_driver); 932 pci_dev_put(s_bridge); 933 s_bridge = NULL; 934 } 935 } 936 937 MODULE_AUTHOR("Roger Lucas <roger@planbit.co.uk>"); 938 MODULE_DESCRIPTION("VT8231 sensors"); 939 MODULE_LICENSE("GPL"); 940 941 module_init(sm_vt8231_init); 942 module_exit(sm_vt8231_exit); 943