1 /* 2 * lm87.c 3 * 4 * Copyright (C) 2000 Frodo Looijaard <frodol@dds.nl> 5 * Philip Edelbrock <phil@netroedge.com> 6 * Stephen Rousset <stephen.rousset@rocketlogix.com> 7 * Dan Eaton <dan.eaton@rocketlogix.com> 8 * Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org> 9 * 10 * Original port to Linux 2.6 by Jeff Oliver. 11 * 12 * The LM87 is a sensor chip made by National Semiconductor. It monitors up 13 * to 8 voltages (including its own power source), up to three temperatures 14 * (its own plus up to two external ones) and up to two fans. The default 15 * configuration is 6 voltages, two temperatures and two fans (see below). 16 * Voltages are scaled internally with ratios such that the nominal value of 17 * each voltage correspond to a register value of 192 (which means a 18 * resolution of about 0.5% of the nominal value). Temperature values are 19 * reported with a 1 deg resolution and a 3-4 deg accuracy. Complete 20 * datasheet can be obtained from National's website at: 21 * http://www.national.com/pf/LM/LM87.html 22 * 23 * Some functions share pins, so not all functions are available at the same 24 * time. Which are depends on the hardware setup. This driver assumes that 25 * the BIOS configured the chip correctly. In that respect, it differs from 26 * the original driver (from lm_sensors for Linux 2.4), which would force the 27 * LM87 to an arbitrary, compile-time chosen mode, regardless of the actual 28 * chipset wiring. 29 * For reference, here is the list of exclusive functions: 30 * - in0+in5 (default) or temp3 31 * - fan1 (default) or in6 32 * - fan2 (default) or in7 33 * - VID lines (default) or IRQ lines (not handled by this driver) 34 * 35 * The LM87 additionally features an analog output, supposedly usable to 36 * control the speed of a fan. All new chips use pulse width modulation 37 * instead. The LM87 is the only hardware monitoring chipset I know of 38 * which uses amplitude modulation. Be careful when using this feature. 39 * 40 * This driver also supports the ADM1024, a sensor chip made by Analog 41 * Devices. That chip is fully compatible with the LM87. Complete 42 * datasheet can be obtained from Analog's website at: 43 * http://www.analog.com/en/prod/0,2877,ADM1024,00.html 44 * 45 * This program is free software; you can redistribute it and/or modify 46 * it under the terms of the GNU General Public License as published by 47 * the Free Software Foundation; either version 2 of the License, or 48 * (at your option) any later version. 49 * 50 * This program is distributed in the hope that it will be useful, 51 * but WITHOUT ANY WARRANTY; without even the implied warranty of 52 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 53 * GNU General Public License for more details. 54 * 55 * You should have received a copy of the GNU General Public License 56 * along with this program; if not, write to the Free Software 57 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 58 */ 59 60 #include <linux/module.h> 61 #include <linux/init.h> 62 #include <linux/slab.h> 63 #include <linux/jiffies.h> 64 #include <linux/i2c.h> 65 #include <linux/hwmon.h> 66 #include <linux/hwmon-sysfs.h> 67 #include <linux/hwmon-vid.h> 68 #include <linux/err.h> 69 #include <linux/mutex.h> 70 71 /* 72 * Addresses to scan 73 * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e. 74 */ 75 76 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; 77 78 /* 79 * Insmod parameters 80 */ 81 82 I2C_CLIENT_INSMOD_2(lm87, adm1024); 83 84 /* 85 * The LM87 registers 86 */ 87 88 /* nr in 0..5 */ 89 #define LM87_REG_IN(nr) (0x20 + (nr)) 90 #define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2) 91 #define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2) 92 /* nr in 0..1 */ 93 #define LM87_REG_AIN(nr) (0x28 + (nr)) 94 #define LM87_REG_AIN_MIN(nr) (0x1A + (nr)) 95 #define LM87_REG_AIN_MAX(nr) (0x3B + (nr)) 96 97 static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 }; 98 static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B }; 99 static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C }; 100 101 #define LM87_REG_TEMP_HW_INT_LOCK 0x13 102 #define LM87_REG_TEMP_HW_EXT_LOCK 0x14 103 #define LM87_REG_TEMP_HW_INT 0x17 104 #define LM87_REG_TEMP_HW_EXT 0x18 105 106 /* nr in 0..1 */ 107 #define LM87_REG_FAN(nr) (0x28 + (nr)) 108 #define LM87_REG_FAN_MIN(nr) (0x3B + (nr)) 109 #define LM87_REG_AOUT 0x19 110 111 #define LM87_REG_CONFIG 0x40 112 #define LM87_REG_CHANNEL_MODE 0x16 113 #define LM87_REG_VID_FAN_DIV 0x47 114 #define LM87_REG_VID4 0x49 115 116 #define LM87_REG_ALARMS1 0x41 117 #define LM87_REG_ALARMS2 0x42 118 119 #define LM87_REG_COMPANY_ID 0x3E 120 #define LM87_REG_REVISION 0x3F 121 122 /* 123 * Conversions and various macros 124 * The LM87 uses signed 8-bit values for temperatures. 125 */ 126 127 #define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) 128 #define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ 129 (val) * 192 >= (scale) * 255 ? 255 : \ 130 ((val) * 192 + (scale)/2) / (scale)) 131 132 #define TEMP_FROM_REG(reg) ((reg) * 1000) 133 #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ 134 (val) >= 126500 ? 127 : \ 135 (((val) < 0 ? (val)-500 : (val)+500) / 1000)) 136 137 #define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \ 138 (1350000 + (reg)*(div) / 2) / ((reg)*(div))) 139 #define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \ 140 (1350000 + (val)*(div) / 2) / ((val)*(div))) 141 142 #define FAN_DIV_FROM_REG(reg) (1 << (reg)) 143 144 /* analog out is 9.80mV/LSB */ 145 #define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10) 146 #define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \ 147 (val) >= 2500 ? 255 : \ 148 ((val) * 10 + 49) / 98) 149 150 /* nr in 0..1 */ 151 #define CHAN_NO_FAN(nr) (1 << (nr)) 152 #define CHAN_TEMP3 (1 << 2) 153 #define CHAN_VCC_5V (1 << 3) 154 #define CHAN_NO_VID (1 << 7) 155 156 /* 157 * Functions declaration 158 */ 159 160 static int lm87_probe(struct i2c_client *client, 161 const struct i2c_device_id *id); 162 static int lm87_detect(struct i2c_client *new_client, int kind, 163 struct i2c_board_info *info); 164 static void lm87_init_client(struct i2c_client *client); 165 static int lm87_remove(struct i2c_client *client); 166 static struct lm87_data *lm87_update_device(struct device *dev); 167 168 /* 169 * Driver data (common to all clients) 170 */ 171 172 static const struct i2c_device_id lm87_id[] = { 173 { "lm87", lm87 }, 174 { "adm1024", adm1024 }, 175 { } 176 }; 177 MODULE_DEVICE_TABLE(i2c, lm87_id); 178 179 static struct i2c_driver lm87_driver = { 180 .class = I2C_CLASS_HWMON, 181 .driver = { 182 .name = "lm87", 183 }, 184 .probe = lm87_probe, 185 .remove = lm87_remove, 186 .id_table = lm87_id, 187 .detect = lm87_detect, 188 .address_data = &addr_data, 189 }; 190 191 /* 192 * Client data (each client gets its own) 193 */ 194 195 struct lm87_data { 196 struct device *hwmon_dev; 197 struct mutex update_lock; 198 char valid; /* zero until following fields are valid */ 199 unsigned long last_updated; /* In jiffies */ 200 201 u8 channel; /* register value */ 202 203 u8 in[8]; /* register value */ 204 u8 in_max[8]; /* register value */ 205 u8 in_min[8]; /* register value */ 206 u16 in_scale[8]; 207 208 s8 temp[3]; /* register value */ 209 s8 temp_high[3]; /* register value */ 210 s8 temp_low[3]; /* register value */ 211 s8 temp_crit_int; /* min of two register values */ 212 s8 temp_crit_ext; /* min of two register values */ 213 214 u8 fan[2]; /* register value */ 215 u8 fan_min[2]; /* register value */ 216 u8 fan_div[2]; /* register value, shifted right */ 217 u8 aout; /* register value */ 218 219 u16 alarms; /* register values, combined */ 220 u8 vid; /* register values, combined */ 221 u8 vrm; 222 }; 223 224 /* 225 * Sysfs stuff 226 */ 227 228 static inline int lm87_read_value(struct i2c_client *client, u8 reg) 229 { 230 return i2c_smbus_read_byte_data(client, reg); 231 } 232 233 static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value) 234 { 235 return i2c_smbus_write_byte_data(client, reg, value); 236 } 237 238 #define show_in(offset) \ 239 static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 240 { \ 241 struct lm87_data *data = lm87_update_device(dev); \ 242 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \ 243 data->in_scale[offset])); \ 244 } \ 245 static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ 246 { \ 247 struct lm87_data *data = lm87_update_device(dev); \ 248 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \ 249 data->in_scale[offset])); \ 250 } \ 251 static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \ 252 { \ 253 struct lm87_data *data = lm87_update_device(dev); \ 254 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \ 255 data->in_scale[offset])); \ 256 } \ 257 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 258 show_in##offset##_input, NULL); 259 show_in(0); 260 show_in(1); 261 show_in(2); 262 show_in(3); 263 show_in(4); 264 show_in(5); 265 show_in(6); 266 show_in(7); 267 268 static void set_in_min(struct device *dev, const char *buf, int nr) 269 { 270 struct i2c_client *client = to_i2c_client(dev); 271 struct lm87_data *data = i2c_get_clientdata(client); 272 long val = simple_strtol(buf, NULL, 10); 273 274 mutex_lock(&data->update_lock); 275 data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]); 276 lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) : 277 LM87_REG_AIN_MIN(nr-6), data->in_min[nr]); 278 mutex_unlock(&data->update_lock); 279 } 280 281 static void set_in_max(struct device *dev, const char *buf, int nr) 282 { 283 struct i2c_client *client = to_i2c_client(dev); 284 struct lm87_data *data = i2c_get_clientdata(client); 285 long val = simple_strtol(buf, NULL, 10); 286 287 mutex_lock(&data->update_lock); 288 data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]); 289 lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) : 290 LM87_REG_AIN_MAX(nr-6), data->in_max[nr]); 291 mutex_unlock(&data->update_lock); 292 } 293 294 #define set_in(offset) \ 295 static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \ 296 const char *buf, size_t count) \ 297 { \ 298 set_in_min(dev, buf, offset); \ 299 return count; \ 300 } \ 301 static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \ 302 const char *buf, size_t count) \ 303 { \ 304 set_in_max(dev, buf, offset); \ 305 return count; \ 306 } \ 307 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 308 show_in##offset##_min, set_in##offset##_min); \ 309 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 310 show_in##offset##_max, set_in##offset##_max); 311 set_in(0); 312 set_in(1); 313 set_in(2); 314 set_in(3); 315 set_in(4); 316 set_in(5); 317 set_in(6); 318 set_in(7); 319 320 #define show_temp(offset) \ 321 static ssize_t show_temp##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 322 { \ 323 struct lm87_data *data = lm87_update_device(dev); \ 324 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \ 325 } \ 326 static ssize_t show_temp##offset##_low(struct device *dev, struct device_attribute *attr, char *buf) \ 327 { \ 328 struct lm87_data *data = lm87_update_device(dev); \ 329 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \ 330 } \ 331 static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \ 332 { \ 333 struct lm87_data *data = lm87_update_device(dev); \ 334 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \ 335 }\ 336 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 337 show_temp##offset##_input, NULL); 338 show_temp(1); 339 show_temp(2); 340 show_temp(3); 341 342 static void set_temp_low(struct device *dev, const char *buf, int nr) 343 { 344 struct i2c_client *client = to_i2c_client(dev); 345 struct lm87_data *data = i2c_get_clientdata(client); 346 long val = simple_strtol(buf, NULL, 10); 347 348 mutex_lock(&data->update_lock); 349 data->temp_low[nr] = TEMP_TO_REG(val); 350 lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]); 351 mutex_unlock(&data->update_lock); 352 } 353 354 static void set_temp_high(struct device *dev, const char *buf, int nr) 355 { 356 struct i2c_client *client = to_i2c_client(dev); 357 struct lm87_data *data = i2c_get_clientdata(client); 358 long val = simple_strtol(buf, NULL, 10); 359 360 mutex_lock(&data->update_lock); 361 data->temp_high[nr] = TEMP_TO_REG(val); 362 lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]); 363 mutex_unlock(&data->update_lock); 364 } 365 366 #define set_temp(offset) \ 367 static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \ 368 const char *buf, size_t count) \ 369 { \ 370 set_temp_low(dev, buf, offset-1); \ 371 return count; \ 372 } \ 373 static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \ 374 const char *buf, size_t count) \ 375 { \ 376 set_temp_high(dev, buf, offset-1); \ 377 return count; \ 378 } \ 379 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 380 show_temp##offset##_high, set_temp##offset##_high); \ 381 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 382 show_temp##offset##_low, set_temp##offset##_low); 383 set_temp(1); 384 set_temp(2); 385 set_temp(3); 386 387 static ssize_t show_temp_crit_int(struct device *dev, struct device_attribute *attr, char *buf) 388 { 389 struct lm87_data *data = lm87_update_device(dev); 390 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int)); 391 } 392 393 static ssize_t show_temp_crit_ext(struct device *dev, struct device_attribute *attr, char *buf) 394 { 395 struct lm87_data *data = lm87_update_device(dev); 396 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext)); 397 } 398 399 static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL); 400 static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL); 401 static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL); 402 403 #define show_fan(offset) \ 404 static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 405 { \ 406 struct lm87_data *data = lm87_update_device(dev); \ 407 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \ 408 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ 409 } \ 410 static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ 411 { \ 412 struct lm87_data *data = lm87_update_device(dev); \ 413 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \ 414 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ 415 } \ 416 static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \ 417 { \ 418 struct lm87_data *data = lm87_update_device(dev); \ 419 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \ 420 } \ 421 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 422 show_fan##offset##_input, NULL); 423 show_fan(1); 424 show_fan(2); 425 426 static void set_fan_min(struct device *dev, const char *buf, int nr) 427 { 428 struct i2c_client *client = to_i2c_client(dev); 429 struct lm87_data *data = i2c_get_clientdata(client); 430 long val = simple_strtol(buf, NULL, 10); 431 432 mutex_lock(&data->update_lock); 433 data->fan_min[nr] = FAN_TO_REG(val, 434 FAN_DIV_FROM_REG(data->fan_div[nr])); 435 lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]); 436 mutex_unlock(&data->update_lock); 437 } 438 439 /* Note: we save and restore the fan minimum here, because its value is 440 determined in part by the fan clock divider. This follows the principle 441 of least surprise; the user doesn't expect the fan minimum to change just 442 because the divider changed. */ 443 static ssize_t set_fan_div(struct device *dev, const char *buf, 444 size_t count, int nr) 445 { 446 struct i2c_client *client = to_i2c_client(dev); 447 struct lm87_data *data = i2c_get_clientdata(client); 448 long val = simple_strtol(buf, NULL, 10); 449 unsigned long min; 450 u8 reg; 451 452 mutex_lock(&data->update_lock); 453 min = FAN_FROM_REG(data->fan_min[nr], 454 FAN_DIV_FROM_REG(data->fan_div[nr])); 455 456 switch (val) { 457 case 1: data->fan_div[nr] = 0; break; 458 case 2: data->fan_div[nr] = 1; break; 459 case 4: data->fan_div[nr] = 2; break; 460 case 8: data->fan_div[nr] = 3; break; 461 default: 462 mutex_unlock(&data->update_lock); 463 return -EINVAL; 464 } 465 466 reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV); 467 switch (nr) { 468 case 0: 469 reg = (reg & 0xCF) | (data->fan_div[0] << 4); 470 break; 471 case 1: 472 reg = (reg & 0x3F) | (data->fan_div[1] << 6); 473 break; 474 } 475 lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg); 476 477 data->fan_min[nr] = FAN_TO_REG(min, val); 478 lm87_write_value(client, LM87_REG_FAN_MIN(nr), 479 data->fan_min[nr]); 480 mutex_unlock(&data->update_lock); 481 482 return count; 483 } 484 485 #define set_fan(offset) \ 486 static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \ 487 size_t count) \ 488 { \ 489 set_fan_min(dev, buf, offset-1); \ 490 return count; \ 491 } \ 492 static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \ 493 size_t count) \ 494 { \ 495 return set_fan_div(dev, buf, count, offset-1); \ 496 } \ 497 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 498 show_fan##offset##_min, set_fan##offset##_min); \ 499 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 500 show_fan##offset##_div, set_fan##offset##_div); 501 set_fan(1); 502 set_fan(2); 503 504 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 505 { 506 struct lm87_data *data = lm87_update_device(dev); 507 return sprintf(buf, "%d\n", data->alarms); 508 } 509 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 510 511 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) 512 { 513 struct lm87_data *data = lm87_update_device(dev); 514 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 515 } 516 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 517 518 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf) 519 { 520 struct lm87_data *data = dev_get_drvdata(dev); 521 return sprintf(buf, "%d\n", data->vrm); 522 } 523 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 524 { 525 struct lm87_data *data = dev_get_drvdata(dev); 526 data->vrm = simple_strtoul(buf, NULL, 10); 527 return count; 528 } 529 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 530 531 static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf) 532 { 533 struct lm87_data *data = lm87_update_device(dev); 534 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); 535 } 536 static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 537 { 538 struct i2c_client *client = to_i2c_client(dev); 539 struct lm87_data *data = i2c_get_clientdata(client); 540 long val = simple_strtol(buf, NULL, 10); 541 542 mutex_lock(&data->update_lock); 543 data->aout = AOUT_TO_REG(val); 544 lm87_write_value(client, LM87_REG_AOUT, data->aout); 545 mutex_unlock(&data->update_lock); 546 return count; 547 } 548 static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); 549 550 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 551 char *buf) 552 { 553 struct lm87_data *data = lm87_update_device(dev); 554 int bitnr = to_sensor_dev_attr(attr)->index; 555 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 556 } 557 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 558 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 559 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 560 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 561 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 562 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); 563 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6); 564 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7); 565 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 566 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); 567 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 5); 568 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 569 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 570 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 14); 571 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15); 572 573 /* 574 * Real code 575 */ 576 577 static struct attribute *lm87_attributes[] = { 578 &dev_attr_in1_input.attr, 579 &dev_attr_in1_min.attr, 580 &dev_attr_in1_max.attr, 581 &sensor_dev_attr_in1_alarm.dev_attr.attr, 582 &dev_attr_in2_input.attr, 583 &dev_attr_in2_min.attr, 584 &dev_attr_in2_max.attr, 585 &sensor_dev_attr_in2_alarm.dev_attr.attr, 586 &dev_attr_in3_input.attr, 587 &dev_attr_in3_min.attr, 588 &dev_attr_in3_max.attr, 589 &sensor_dev_attr_in3_alarm.dev_attr.attr, 590 &dev_attr_in4_input.attr, 591 &dev_attr_in4_min.attr, 592 &dev_attr_in4_max.attr, 593 &sensor_dev_attr_in4_alarm.dev_attr.attr, 594 595 &dev_attr_temp1_input.attr, 596 &dev_attr_temp1_max.attr, 597 &dev_attr_temp1_min.attr, 598 &dev_attr_temp1_crit.attr, 599 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 600 &dev_attr_temp2_input.attr, 601 &dev_attr_temp2_max.attr, 602 &dev_attr_temp2_min.attr, 603 &dev_attr_temp2_crit.attr, 604 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 605 &sensor_dev_attr_temp2_fault.dev_attr.attr, 606 607 &dev_attr_alarms.attr, 608 &dev_attr_aout_output.attr, 609 610 NULL 611 }; 612 613 static const struct attribute_group lm87_group = { 614 .attrs = lm87_attributes, 615 }; 616 617 static struct attribute *lm87_attributes_opt[] = { 618 &dev_attr_in6_input.attr, 619 &dev_attr_in6_min.attr, 620 &dev_attr_in6_max.attr, 621 &sensor_dev_attr_in6_alarm.dev_attr.attr, 622 623 &dev_attr_fan1_input.attr, 624 &dev_attr_fan1_min.attr, 625 &dev_attr_fan1_div.attr, 626 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 627 628 &dev_attr_in7_input.attr, 629 &dev_attr_in7_min.attr, 630 &dev_attr_in7_max.attr, 631 &sensor_dev_attr_in7_alarm.dev_attr.attr, 632 633 &dev_attr_fan2_input.attr, 634 &dev_attr_fan2_min.attr, 635 &dev_attr_fan2_div.attr, 636 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 637 638 &dev_attr_temp3_input.attr, 639 &dev_attr_temp3_max.attr, 640 &dev_attr_temp3_min.attr, 641 &dev_attr_temp3_crit.attr, 642 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 643 &sensor_dev_attr_temp3_fault.dev_attr.attr, 644 645 &dev_attr_in0_input.attr, 646 &dev_attr_in0_min.attr, 647 &dev_attr_in0_max.attr, 648 &sensor_dev_attr_in0_alarm.dev_attr.attr, 649 &dev_attr_in5_input.attr, 650 &dev_attr_in5_min.attr, 651 &dev_attr_in5_max.attr, 652 &sensor_dev_attr_in5_alarm.dev_attr.attr, 653 654 &dev_attr_cpu0_vid.attr, 655 &dev_attr_vrm.attr, 656 657 NULL 658 }; 659 660 static const struct attribute_group lm87_group_opt = { 661 .attrs = lm87_attributes_opt, 662 }; 663 664 /* Return 0 if detection is successful, -ENODEV otherwise */ 665 static int lm87_detect(struct i2c_client *new_client, int kind, 666 struct i2c_board_info *info) 667 { 668 struct i2c_adapter *adapter = new_client->adapter; 669 static const char *names[] = { "lm87", "adm1024" }; 670 671 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 672 return -ENODEV; 673 674 /* Default to an LM87 if forced */ 675 if (kind == 0) 676 kind = lm87; 677 678 /* Now, we do the remaining detection. */ 679 if (kind < 0) { 680 u8 cid = lm87_read_value(new_client, LM87_REG_COMPANY_ID); 681 u8 rev = lm87_read_value(new_client, LM87_REG_REVISION); 682 683 if (cid == 0x02 /* National Semiconductor */ 684 && (rev >= 0x01 && rev <= 0x08)) 685 kind = lm87; 686 else if (cid == 0x41 /* Analog Devices */ 687 && (rev & 0xf0) == 0x10) 688 kind = adm1024; 689 690 if (kind < 0 691 || (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)) { 692 dev_dbg(&adapter->dev, 693 "LM87 detection failed at 0x%02x.\n", 694 new_client->addr); 695 return -ENODEV; 696 } 697 } 698 699 strlcpy(info->type, names[kind - 1], I2C_NAME_SIZE); 700 701 return 0; 702 } 703 704 static int lm87_probe(struct i2c_client *new_client, 705 const struct i2c_device_id *id) 706 { 707 struct lm87_data *data; 708 int err; 709 710 data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL); 711 if (!data) { 712 err = -ENOMEM; 713 goto exit; 714 } 715 716 i2c_set_clientdata(new_client, data); 717 data->valid = 0; 718 mutex_init(&data->update_lock); 719 720 /* Initialize the LM87 chip */ 721 lm87_init_client(new_client); 722 723 data->in_scale[0] = 2500; 724 data->in_scale[1] = 2700; 725 data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300; 726 data->in_scale[3] = 5000; 727 data->in_scale[4] = 12000; 728 data->in_scale[5] = 2700; 729 data->in_scale[6] = 1875; 730 data->in_scale[7] = 1875; 731 732 /* Register sysfs hooks */ 733 if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group))) 734 goto exit_free; 735 736 if (data->channel & CHAN_NO_FAN(0)) { 737 if ((err = device_create_file(&new_client->dev, 738 &dev_attr_in6_input)) 739 || (err = device_create_file(&new_client->dev, 740 &dev_attr_in6_min)) 741 || (err = device_create_file(&new_client->dev, 742 &dev_attr_in6_max)) 743 || (err = device_create_file(&new_client->dev, 744 &sensor_dev_attr_in6_alarm.dev_attr))) 745 goto exit_remove; 746 } else { 747 if ((err = device_create_file(&new_client->dev, 748 &dev_attr_fan1_input)) 749 || (err = device_create_file(&new_client->dev, 750 &dev_attr_fan1_min)) 751 || (err = device_create_file(&new_client->dev, 752 &dev_attr_fan1_div)) 753 || (err = device_create_file(&new_client->dev, 754 &sensor_dev_attr_fan1_alarm.dev_attr))) 755 goto exit_remove; 756 } 757 758 if (data->channel & CHAN_NO_FAN(1)) { 759 if ((err = device_create_file(&new_client->dev, 760 &dev_attr_in7_input)) 761 || (err = device_create_file(&new_client->dev, 762 &dev_attr_in7_min)) 763 || (err = device_create_file(&new_client->dev, 764 &dev_attr_in7_max)) 765 || (err = device_create_file(&new_client->dev, 766 &sensor_dev_attr_in7_alarm.dev_attr))) 767 goto exit_remove; 768 } else { 769 if ((err = device_create_file(&new_client->dev, 770 &dev_attr_fan2_input)) 771 || (err = device_create_file(&new_client->dev, 772 &dev_attr_fan2_min)) 773 || (err = device_create_file(&new_client->dev, 774 &dev_attr_fan2_div)) 775 || (err = device_create_file(&new_client->dev, 776 &sensor_dev_attr_fan2_alarm.dev_attr))) 777 goto exit_remove; 778 } 779 780 if (data->channel & CHAN_TEMP3) { 781 if ((err = device_create_file(&new_client->dev, 782 &dev_attr_temp3_input)) 783 || (err = device_create_file(&new_client->dev, 784 &dev_attr_temp3_max)) 785 || (err = device_create_file(&new_client->dev, 786 &dev_attr_temp3_min)) 787 || (err = device_create_file(&new_client->dev, 788 &dev_attr_temp3_crit)) 789 || (err = device_create_file(&new_client->dev, 790 &sensor_dev_attr_temp3_alarm.dev_attr)) 791 || (err = device_create_file(&new_client->dev, 792 &sensor_dev_attr_temp3_fault.dev_attr))) 793 goto exit_remove; 794 } else { 795 if ((err = device_create_file(&new_client->dev, 796 &dev_attr_in0_input)) 797 || (err = device_create_file(&new_client->dev, 798 &dev_attr_in0_min)) 799 || (err = device_create_file(&new_client->dev, 800 &dev_attr_in0_max)) 801 || (err = device_create_file(&new_client->dev, 802 &sensor_dev_attr_in0_alarm.dev_attr)) 803 || (err = device_create_file(&new_client->dev, 804 &dev_attr_in5_input)) 805 || (err = device_create_file(&new_client->dev, 806 &dev_attr_in5_min)) 807 || (err = device_create_file(&new_client->dev, 808 &dev_attr_in5_max)) 809 || (err = device_create_file(&new_client->dev, 810 &sensor_dev_attr_in5_alarm.dev_attr))) 811 goto exit_remove; 812 } 813 814 if (!(data->channel & CHAN_NO_VID)) { 815 data->vrm = vid_which_vrm(); 816 if ((err = device_create_file(&new_client->dev, 817 &dev_attr_cpu0_vid)) 818 || (err = device_create_file(&new_client->dev, 819 &dev_attr_vrm))) 820 goto exit_remove; 821 } 822 823 data->hwmon_dev = hwmon_device_register(&new_client->dev); 824 if (IS_ERR(data->hwmon_dev)) { 825 err = PTR_ERR(data->hwmon_dev); 826 goto exit_remove; 827 } 828 829 return 0; 830 831 exit_remove: 832 sysfs_remove_group(&new_client->dev.kobj, &lm87_group); 833 sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt); 834 exit_free: 835 kfree(data); 836 exit: 837 return err; 838 } 839 840 static void lm87_init_client(struct i2c_client *client) 841 { 842 struct lm87_data *data = i2c_get_clientdata(client); 843 u8 config; 844 845 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE); 846 847 config = lm87_read_value(client, LM87_REG_CONFIG); 848 if (!(config & 0x01)) { 849 int i; 850 851 /* Limits are left uninitialized after power-up */ 852 for (i = 1; i < 6; i++) { 853 lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00); 854 lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF); 855 } 856 for (i = 0; i < 2; i++) { 857 lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F); 858 lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00); 859 lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00); 860 lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF); 861 } 862 if (data->channel & CHAN_TEMP3) { 863 lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F); 864 lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00); 865 } else { 866 lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00); 867 lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF); 868 } 869 } 870 if ((config & 0x81) != 0x01) { 871 /* Start monitoring */ 872 lm87_write_value(client, LM87_REG_CONFIG, 873 (config & 0xF7) | 0x01); 874 } 875 } 876 877 static int lm87_remove(struct i2c_client *client) 878 { 879 struct lm87_data *data = i2c_get_clientdata(client); 880 881 hwmon_device_unregister(data->hwmon_dev); 882 sysfs_remove_group(&client->dev.kobj, &lm87_group); 883 sysfs_remove_group(&client->dev.kobj, &lm87_group_opt); 884 885 kfree(data); 886 return 0; 887 } 888 889 static struct lm87_data *lm87_update_device(struct device *dev) 890 { 891 struct i2c_client *client = to_i2c_client(dev); 892 struct lm87_data *data = i2c_get_clientdata(client); 893 894 mutex_lock(&data->update_lock); 895 896 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 897 int i, j; 898 899 dev_dbg(&client->dev, "Updating data.\n"); 900 901 i = (data->channel & CHAN_TEMP3) ? 1 : 0; 902 j = (data->channel & CHAN_TEMP3) ? 5 : 6; 903 for (; i < j; i++) { 904 data->in[i] = lm87_read_value(client, 905 LM87_REG_IN(i)); 906 data->in_min[i] = lm87_read_value(client, 907 LM87_REG_IN_MIN(i)); 908 data->in_max[i] = lm87_read_value(client, 909 LM87_REG_IN_MAX(i)); 910 } 911 912 for (i = 0; i < 2; i++) { 913 if (data->channel & CHAN_NO_FAN(i)) { 914 data->in[6+i] = lm87_read_value(client, 915 LM87_REG_AIN(i)); 916 data->in_max[6+i] = lm87_read_value(client, 917 LM87_REG_AIN_MAX(i)); 918 data->in_min[6+i] = lm87_read_value(client, 919 LM87_REG_AIN_MIN(i)); 920 921 } else { 922 data->fan[i] = lm87_read_value(client, 923 LM87_REG_FAN(i)); 924 data->fan_min[i] = lm87_read_value(client, 925 LM87_REG_FAN_MIN(i)); 926 } 927 } 928 929 j = (data->channel & CHAN_TEMP3) ? 3 : 2; 930 for (i = 0 ; i < j; i++) { 931 data->temp[i] = lm87_read_value(client, 932 LM87_REG_TEMP[i]); 933 data->temp_high[i] = lm87_read_value(client, 934 LM87_REG_TEMP_HIGH[i]); 935 data->temp_low[i] = lm87_read_value(client, 936 LM87_REG_TEMP_LOW[i]); 937 } 938 939 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK); 940 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT); 941 data->temp_crit_int = min(i, j); 942 943 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK); 944 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT); 945 data->temp_crit_ext = min(i, j); 946 947 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV); 948 data->fan_div[0] = (i >> 4) & 0x03; 949 data->fan_div[1] = (i >> 6) & 0x03; 950 data->vid = (i & 0x0F) 951 | (lm87_read_value(client, LM87_REG_VID4) & 0x01) 952 << 4; 953 954 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1) 955 | (lm87_read_value(client, LM87_REG_ALARMS2) 956 << 8); 957 data->aout = lm87_read_value(client, LM87_REG_AOUT); 958 959 data->last_updated = jiffies; 960 data->valid = 1; 961 } 962 963 mutex_unlock(&data->update_lock); 964 965 return data; 966 } 967 968 static int __init sensors_lm87_init(void) 969 { 970 return i2c_add_driver(&lm87_driver); 971 } 972 973 static void __exit sensors_lm87_exit(void) 974 { 975 i2c_del_driver(&lm87_driver); 976 } 977 978 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others"); 979 MODULE_DESCRIPTION("LM87 driver"); 980 MODULE_LICENSE("GPL"); 981 982 module_init(sensors_lm87_init); 983 module_exit(sensors_lm87_exit); 984