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 normally 25 * assumes that firmware configured the chip correctly. Where this is not 26 * the case, platform code must set the I2C client's platform_data to point 27 * to a u8 value to be written to the channel register. 28 * For reference, here is the list of exclusive functions: 29 * - in0+in5 (default) or temp3 30 * - fan1 (default) or in6 31 * - fan2 (default) or in7 32 * - VID lines (default) or IRQ lines (not handled by this driver) 33 * 34 * The LM87 additionally features an analog output, supposedly usable to 35 * control the speed of a fan. All new chips use pulse width modulation 36 * instead. The LM87 is the only hardware monitoring chipset I know of 37 * which uses amplitude modulation. Be careful when using this feature. 38 * 39 * This driver also supports the ADM1024, a sensor chip made by Analog 40 * Devices. That chip is fully compatible with the LM87. Complete 41 * datasheet can be obtained from Analog's website at: 42 * http://www.analog.com/en/prod/0,2877,ADM1024,00.html 43 * 44 * This program is free software; you can redistribute it and/or modify 45 * it under the terms of the GNU General Public License as published by 46 * the Free Software Foundation; either version 2 of the License, or 47 * (at your option) any later version. 48 * 49 * This program is distributed in the hope that it will be useful, 50 * but WITHOUT ANY WARRANTY; without even the implied warranty of 51 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 52 * GNU General Public License for more details. 53 * 54 * You should have received a copy of the GNU General Public License 55 * along with this program; if not, write to the Free Software 56 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 57 */ 58 59 #include <linux/module.h> 60 #include <linux/init.h> 61 #include <linux/slab.h> 62 #include <linux/jiffies.h> 63 #include <linux/i2c.h> 64 #include <linux/hwmon.h> 65 #include <linux/hwmon-sysfs.h> 66 #include <linux/hwmon-vid.h> 67 #include <linux/err.h> 68 #include <linux/mutex.h> 69 70 /* 71 * Addresses to scan 72 * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e. 73 */ 74 75 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; 76 77 enum chips { lm87, adm1024 }; 78 79 /* 80 * The LM87 registers 81 */ 82 83 /* nr in 0..5 */ 84 #define LM87_REG_IN(nr) (0x20 + (nr)) 85 #define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2) 86 #define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2) 87 /* nr in 0..1 */ 88 #define LM87_REG_AIN(nr) (0x28 + (nr)) 89 #define LM87_REG_AIN_MIN(nr) (0x1A + (nr)) 90 #define LM87_REG_AIN_MAX(nr) (0x3B + (nr)) 91 92 static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 }; 93 static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B }; 94 static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C }; 95 96 #define LM87_REG_TEMP_HW_INT_LOCK 0x13 97 #define LM87_REG_TEMP_HW_EXT_LOCK 0x14 98 #define LM87_REG_TEMP_HW_INT 0x17 99 #define LM87_REG_TEMP_HW_EXT 0x18 100 101 /* nr in 0..1 */ 102 #define LM87_REG_FAN(nr) (0x28 + (nr)) 103 #define LM87_REG_FAN_MIN(nr) (0x3B + (nr)) 104 #define LM87_REG_AOUT 0x19 105 106 #define LM87_REG_CONFIG 0x40 107 #define LM87_REG_CHANNEL_MODE 0x16 108 #define LM87_REG_VID_FAN_DIV 0x47 109 #define LM87_REG_VID4 0x49 110 111 #define LM87_REG_ALARMS1 0x41 112 #define LM87_REG_ALARMS2 0x42 113 114 #define LM87_REG_COMPANY_ID 0x3E 115 #define LM87_REG_REVISION 0x3F 116 117 /* 118 * Conversions and various macros 119 * The LM87 uses signed 8-bit values for temperatures. 120 */ 121 122 #define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) 123 #define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ 124 (val) * 192 >= (scale) * 255 ? 255 : \ 125 ((val) * 192 + (scale)/2) / (scale)) 126 127 #define TEMP_FROM_REG(reg) ((reg) * 1000) 128 #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ 129 (val) >= 126500 ? 127 : \ 130 (((val) < 0 ? (val)-500 : (val)+500) / 1000)) 131 132 #define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \ 133 (1350000 + (reg)*(div) / 2) / ((reg)*(div))) 134 #define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \ 135 (1350000 + (val)*(div) / 2) / ((val)*(div))) 136 137 #define FAN_DIV_FROM_REG(reg) (1 << (reg)) 138 139 /* analog out is 9.80mV/LSB */ 140 #define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10) 141 #define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \ 142 (val) >= 2500 ? 255 : \ 143 ((val) * 10 + 49) / 98) 144 145 /* nr in 0..1 */ 146 #define CHAN_NO_FAN(nr) (1 << (nr)) 147 #define CHAN_TEMP3 (1 << 2) 148 #define CHAN_VCC_5V (1 << 3) 149 #define CHAN_NO_VID (1 << 7) 150 151 /* 152 * Functions declaration 153 */ 154 155 static int lm87_probe(struct i2c_client *client, 156 const struct i2c_device_id *id); 157 static int lm87_detect(struct i2c_client *new_client, 158 struct i2c_board_info *info); 159 static void lm87_init_client(struct i2c_client *client); 160 static int lm87_remove(struct i2c_client *client); 161 static struct lm87_data *lm87_update_device(struct device *dev); 162 163 /* 164 * Driver data (common to all clients) 165 */ 166 167 static const struct i2c_device_id lm87_id[] = { 168 { "lm87", lm87 }, 169 { "adm1024", adm1024 }, 170 { } 171 }; 172 MODULE_DEVICE_TABLE(i2c, lm87_id); 173 174 static struct i2c_driver lm87_driver = { 175 .class = I2C_CLASS_HWMON, 176 .driver = { 177 .name = "lm87", 178 }, 179 .probe = lm87_probe, 180 .remove = lm87_remove, 181 .id_table = lm87_id, 182 .detect = lm87_detect, 183 .address_list = normal_i2c, 184 }; 185 186 /* 187 * Client data (each client gets its own) 188 */ 189 190 struct lm87_data { 191 struct device *hwmon_dev; 192 struct mutex update_lock; 193 char valid; /* zero until following fields are valid */ 194 unsigned long last_updated; /* In jiffies */ 195 196 u8 channel; /* register value */ 197 u8 config; /* original register value */ 198 199 u8 in[8]; /* register value */ 200 u8 in_max[8]; /* register value */ 201 u8 in_min[8]; /* register value */ 202 u16 in_scale[8]; 203 204 s8 temp[3]; /* register value */ 205 s8 temp_high[3]; /* register value */ 206 s8 temp_low[3]; /* register value */ 207 s8 temp_crit_int; /* min of two register values */ 208 s8 temp_crit_ext; /* min of two register values */ 209 210 u8 fan[2]; /* register value */ 211 u8 fan_min[2]; /* register value */ 212 u8 fan_div[2]; /* register value, shifted right */ 213 u8 aout; /* register value */ 214 215 u16 alarms; /* register values, combined */ 216 u8 vid; /* register values, combined */ 217 u8 vrm; 218 }; 219 220 /* 221 * Sysfs stuff 222 */ 223 224 static inline int lm87_read_value(struct i2c_client *client, u8 reg) 225 { 226 return i2c_smbus_read_byte_data(client, reg); 227 } 228 229 static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value) 230 { 231 return i2c_smbus_write_byte_data(client, reg, value); 232 } 233 234 #define show_in(offset) \ 235 static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 236 { \ 237 struct lm87_data *data = lm87_update_device(dev); \ 238 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \ 239 data->in_scale[offset])); \ 240 } \ 241 static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ 242 { \ 243 struct lm87_data *data = lm87_update_device(dev); \ 244 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \ 245 data->in_scale[offset])); \ 246 } \ 247 static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \ 248 { \ 249 struct lm87_data *data = lm87_update_device(dev); \ 250 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \ 251 data->in_scale[offset])); \ 252 } \ 253 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 254 show_in##offset##_input, NULL); 255 show_in(0); 256 show_in(1); 257 show_in(2); 258 show_in(3); 259 show_in(4); 260 show_in(5); 261 show_in(6); 262 show_in(7); 263 264 static void set_in_min(struct device *dev, const char *buf, int nr) 265 { 266 struct i2c_client *client = to_i2c_client(dev); 267 struct lm87_data *data = i2c_get_clientdata(client); 268 long val = simple_strtol(buf, NULL, 10); 269 270 mutex_lock(&data->update_lock); 271 data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]); 272 lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) : 273 LM87_REG_AIN_MIN(nr-6), data->in_min[nr]); 274 mutex_unlock(&data->update_lock); 275 } 276 277 static void set_in_max(struct device *dev, const char *buf, int nr) 278 { 279 struct i2c_client *client = to_i2c_client(dev); 280 struct lm87_data *data = i2c_get_clientdata(client); 281 long val = simple_strtol(buf, NULL, 10); 282 283 mutex_lock(&data->update_lock); 284 data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]); 285 lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) : 286 LM87_REG_AIN_MAX(nr-6), data->in_max[nr]); 287 mutex_unlock(&data->update_lock); 288 } 289 290 #define set_in(offset) \ 291 static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \ 292 const char *buf, size_t count) \ 293 { \ 294 set_in_min(dev, buf, offset); \ 295 return count; \ 296 } \ 297 static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \ 298 const char *buf, size_t count) \ 299 { \ 300 set_in_max(dev, buf, offset); \ 301 return count; \ 302 } \ 303 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 304 show_in##offset##_min, set_in##offset##_min); \ 305 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 306 show_in##offset##_max, set_in##offset##_max); 307 set_in(0); 308 set_in(1); 309 set_in(2); 310 set_in(3); 311 set_in(4); 312 set_in(5); 313 set_in(6); 314 set_in(7); 315 316 #define show_temp(offset) \ 317 static ssize_t show_temp##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 318 { \ 319 struct lm87_data *data = lm87_update_device(dev); \ 320 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \ 321 } \ 322 static ssize_t show_temp##offset##_low(struct device *dev, struct device_attribute *attr, char *buf) \ 323 { \ 324 struct lm87_data *data = lm87_update_device(dev); \ 325 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \ 326 } \ 327 static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \ 328 { \ 329 struct lm87_data *data = lm87_update_device(dev); \ 330 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \ 331 }\ 332 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 333 show_temp##offset##_input, NULL); 334 show_temp(1); 335 show_temp(2); 336 show_temp(3); 337 338 static void set_temp_low(struct device *dev, const char *buf, int nr) 339 { 340 struct i2c_client *client = to_i2c_client(dev); 341 struct lm87_data *data = i2c_get_clientdata(client); 342 long val = simple_strtol(buf, NULL, 10); 343 344 mutex_lock(&data->update_lock); 345 data->temp_low[nr] = TEMP_TO_REG(val); 346 lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]); 347 mutex_unlock(&data->update_lock); 348 } 349 350 static void set_temp_high(struct device *dev, const char *buf, int nr) 351 { 352 struct i2c_client *client = to_i2c_client(dev); 353 struct lm87_data *data = i2c_get_clientdata(client); 354 long val = simple_strtol(buf, NULL, 10); 355 356 mutex_lock(&data->update_lock); 357 data->temp_high[nr] = TEMP_TO_REG(val); 358 lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]); 359 mutex_unlock(&data->update_lock); 360 } 361 362 #define set_temp(offset) \ 363 static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \ 364 const char *buf, size_t count) \ 365 { \ 366 set_temp_low(dev, buf, offset-1); \ 367 return count; \ 368 } \ 369 static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \ 370 const char *buf, size_t count) \ 371 { \ 372 set_temp_high(dev, buf, offset-1); \ 373 return count; \ 374 } \ 375 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 376 show_temp##offset##_high, set_temp##offset##_high); \ 377 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 378 show_temp##offset##_low, set_temp##offset##_low); 379 set_temp(1); 380 set_temp(2); 381 set_temp(3); 382 383 static ssize_t show_temp_crit_int(struct device *dev, struct device_attribute *attr, char *buf) 384 { 385 struct lm87_data *data = lm87_update_device(dev); 386 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int)); 387 } 388 389 static ssize_t show_temp_crit_ext(struct device *dev, struct device_attribute *attr, char *buf) 390 { 391 struct lm87_data *data = lm87_update_device(dev); 392 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext)); 393 } 394 395 static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL); 396 static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL); 397 static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL); 398 399 #define show_fan(offset) \ 400 static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ 401 { \ 402 struct lm87_data *data = lm87_update_device(dev); \ 403 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \ 404 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ 405 } \ 406 static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ 407 { \ 408 struct lm87_data *data = lm87_update_device(dev); \ 409 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \ 410 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ 411 } \ 412 static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \ 413 { \ 414 struct lm87_data *data = lm87_update_device(dev); \ 415 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \ 416 } \ 417 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 418 show_fan##offset##_input, NULL); 419 show_fan(1); 420 show_fan(2); 421 422 static void set_fan_min(struct device *dev, const char *buf, int nr) 423 { 424 struct i2c_client *client = to_i2c_client(dev); 425 struct lm87_data *data = i2c_get_clientdata(client); 426 long val = simple_strtol(buf, NULL, 10); 427 428 mutex_lock(&data->update_lock); 429 data->fan_min[nr] = FAN_TO_REG(val, 430 FAN_DIV_FROM_REG(data->fan_div[nr])); 431 lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]); 432 mutex_unlock(&data->update_lock); 433 } 434 435 /* Note: we save and restore the fan minimum here, because its value is 436 determined in part by the fan clock divider. This follows the principle 437 of least surprise; the user doesn't expect the fan minimum to change just 438 because the divider changed. */ 439 static ssize_t set_fan_div(struct device *dev, const char *buf, 440 size_t count, int nr) 441 { 442 struct i2c_client *client = to_i2c_client(dev); 443 struct lm87_data *data = i2c_get_clientdata(client); 444 long val = simple_strtol(buf, NULL, 10); 445 unsigned long min; 446 u8 reg; 447 448 mutex_lock(&data->update_lock); 449 min = FAN_FROM_REG(data->fan_min[nr], 450 FAN_DIV_FROM_REG(data->fan_div[nr])); 451 452 switch (val) { 453 case 1: data->fan_div[nr] = 0; break; 454 case 2: data->fan_div[nr] = 1; break; 455 case 4: data->fan_div[nr] = 2; break; 456 case 8: data->fan_div[nr] = 3; break; 457 default: 458 mutex_unlock(&data->update_lock); 459 return -EINVAL; 460 } 461 462 reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV); 463 switch (nr) { 464 case 0: 465 reg = (reg & 0xCF) | (data->fan_div[0] << 4); 466 break; 467 case 1: 468 reg = (reg & 0x3F) | (data->fan_div[1] << 6); 469 break; 470 } 471 lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg); 472 473 data->fan_min[nr] = FAN_TO_REG(min, val); 474 lm87_write_value(client, LM87_REG_FAN_MIN(nr), 475 data->fan_min[nr]); 476 mutex_unlock(&data->update_lock); 477 478 return count; 479 } 480 481 #define set_fan(offset) \ 482 static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \ 483 size_t count) \ 484 { \ 485 set_fan_min(dev, buf, offset-1); \ 486 return count; \ 487 } \ 488 static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \ 489 size_t count) \ 490 { \ 491 return set_fan_div(dev, buf, count, offset-1); \ 492 } \ 493 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 494 show_fan##offset##_min, set_fan##offset##_min); \ 495 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ 496 show_fan##offset##_div, set_fan##offset##_div); 497 set_fan(1); 498 set_fan(2); 499 500 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 501 { 502 struct lm87_data *data = lm87_update_device(dev); 503 return sprintf(buf, "%d\n", data->alarms); 504 } 505 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 506 507 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) 508 { 509 struct lm87_data *data = lm87_update_device(dev); 510 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 511 } 512 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 513 514 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf) 515 { 516 struct lm87_data *data = dev_get_drvdata(dev); 517 return sprintf(buf, "%d\n", data->vrm); 518 } 519 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 520 { 521 struct lm87_data *data = dev_get_drvdata(dev); 522 data->vrm = simple_strtoul(buf, NULL, 10); 523 return count; 524 } 525 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 526 527 static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf) 528 { 529 struct lm87_data *data = lm87_update_device(dev); 530 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); 531 } 532 static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 533 { 534 struct i2c_client *client = to_i2c_client(dev); 535 struct lm87_data *data = i2c_get_clientdata(client); 536 long val = simple_strtol(buf, NULL, 10); 537 538 mutex_lock(&data->update_lock); 539 data->aout = AOUT_TO_REG(val); 540 lm87_write_value(client, LM87_REG_AOUT, data->aout); 541 mutex_unlock(&data->update_lock); 542 return count; 543 } 544 static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); 545 546 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 547 char *buf) 548 { 549 struct lm87_data *data = lm87_update_device(dev); 550 int bitnr = to_sensor_dev_attr(attr)->index; 551 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 552 } 553 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 554 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 555 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 556 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 557 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 558 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); 559 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6); 560 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7); 561 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 562 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); 563 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 5); 564 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 565 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 566 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 14); 567 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15); 568 569 /* 570 * Real code 571 */ 572 573 static struct attribute *lm87_attributes[] = { 574 &dev_attr_in1_input.attr, 575 &dev_attr_in1_min.attr, 576 &dev_attr_in1_max.attr, 577 &sensor_dev_attr_in1_alarm.dev_attr.attr, 578 &dev_attr_in2_input.attr, 579 &dev_attr_in2_min.attr, 580 &dev_attr_in2_max.attr, 581 &sensor_dev_attr_in2_alarm.dev_attr.attr, 582 &dev_attr_in3_input.attr, 583 &dev_attr_in3_min.attr, 584 &dev_attr_in3_max.attr, 585 &sensor_dev_attr_in3_alarm.dev_attr.attr, 586 &dev_attr_in4_input.attr, 587 &dev_attr_in4_min.attr, 588 &dev_attr_in4_max.attr, 589 &sensor_dev_attr_in4_alarm.dev_attr.attr, 590 591 &dev_attr_temp1_input.attr, 592 &dev_attr_temp1_max.attr, 593 &dev_attr_temp1_min.attr, 594 &dev_attr_temp1_crit.attr, 595 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 596 &dev_attr_temp2_input.attr, 597 &dev_attr_temp2_max.attr, 598 &dev_attr_temp2_min.attr, 599 &dev_attr_temp2_crit.attr, 600 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 601 &sensor_dev_attr_temp2_fault.dev_attr.attr, 602 603 &dev_attr_alarms.attr, 604 &dev_attr_aout_output.attr, 605 606 NULL 607 }; 608 609 static const struct attribute_group lm87_group = { 610 .attrs = lm87_attributes, 611 }; 612 613 static struct attribute *lm87_attributes_opt[] = { 614 &dev_attr_in6_input.attr, 615 &dev_attr_in6_min.attr, 616 &dev_attr_in6_max.attr, 617 &sensor_dev_attr_in6_alarm.dev_attr.attr, 618 619 &dev_attr_fan1_input.attr, 620 &dev_attr_fan1_min.attr, 621 &dev_attr_fan1_div.attr, 622 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 623 624 &dev_attr_in7_input.attr, 625 &dev_attr_in7_min.attr, 626 &dev_attr_in7_max.attr, 627 &sensor_dev_attr_in7_alarm.dev_attr.attr, 628 629 &dev_attr_fan2_input.attr, 630 &dev_attr_fan2_min.attr, 631 &dev_attr_fan2_div.attr, 632 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 633 634 &dev_attr_temp3_input.attr, 635 &dev_attr_temp3_max.attr, 636 &dev_attr_temp3_min.attr, 637 &dev_attr_temp3_crit.attr, 638 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 639 &sensor_dev_attr_temp3_fault.dev_attr.attr, 640 641 &dev_attr_in0_input.attr, 642 &dev_attr_in0_min.attr, 643 &dev_attr_in0_max.attr, 644 &sensor_dev_attr_in0_alarm.dev_attr.attr, 645 &dev_attr_in5_input.attr, 646 &dev_attr_in5_min.attr, 647 &dev_attr_in5_max.attr, 648 &sensor_dev_attr_in5_alarm.dev_attr.attr, 649 650 &dev_attr_cpu0_vid.attr, 651 &dev_attr_vrm.attr, 652 653 NULL 654 }; 655 656 static const struct attribute_group lm87_group_opt = { 657 .attrs = lm87_attributes_opt, 658 }; 659 660 /* Return 0 if detection is successful, -ENODEV otherwise */ 661 static int lm87_detect(struct i2c_client *new_client, 662 struct i2c_board_info *info) 663 { 664 struct i2c_adapter *adapter = new_client->adapter; 665 const char *name; 666 u8 cid, rev; 667 668 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 669 return -ENODEV; 670 671 if (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80) 672 return -ENODEV; 673 674 /* Now, we do the remaining detection. */ 675 cid = lm87_read_value(new_client, LM87_REG_COMPANY_ID); 676 rev = lm87_read_value(new_client, LM87_REG_REVISION); 677 678 if (cid == 0x02 /* National Semiconductor */ 679 && (rev >= 0x01 && rev <= 0x08)) 680 name = "lm87"; 681 else if (cid == 0x41 /* Analog Devices */ 682 && (rev & 0xf0) == 0x10) 683 name = "adm1024"; 684 else { 685 dev_dbg(&adapter->dev, "LM87 detection failed at 0x%02x\n", 686 new_client->addr); 687 return -ENODEV; 688 } 689 690 strlcpy(info->type, name, I2C_NAME_SIZE); 691 692 return 0; 693 } 694 695 static int lm87_probe(struct i2c_client *new_client, 696 const struct i2c_device_id *id) 697 { 698 struct lm87_data *data; 699 int err; 700 701 data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL); 702 if (!data) { 703 err = -ENOMEM; 704 goto exit; 705 } 706 707 i2c_set_clientdata(new_client, data); 708 data->valid = 0; 709 mutex_init(&data->update_lock); 710 711 /* Initialize the LM87 chip */ 712 lm87_init_client(new_client); 713 714 data->in_scale[0] = 2500; 715 data->in_scale[1] = 2700; 716 data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300; 717 data->in_scale[3] = 5000; 718 data->in_scale[4] = 12000; 719 data->in_scale[5] = 2700; 720 data->in_scale[6] = 1875; 721 data->in_scale[7] = 1875; 722 723 /* Register sysfs hooks */ 724 if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group))) 725 goto exit_free; 726 727 if (data->channel & CHAN_NO_FAN(0)) { 728 if ((err = device_create_file(&new_client->dev, 729 &dev_attr_in6_input)) 730 || (err = device_create_file(&new_client->dev, 731 &dev_attr_in6_min)) 732 || (err = device_create_file(&new_client->dev, 733 &dev_attr_in6_max)) 734 || (err = device_create_file(&new_client->dev, 735 &sensor_dev_attr_in6_alarm.dev_attr))) 736 goto exit_remove; 737 } else { 738 if ((err = device_create_file(&new_client->dev, 739 &dev_attr_fan1_input)) 740 || (err = device_create_file(&new_client->dev, 741 &dev_attr_fan1_min)) 742 || (err = device_create_file(&new_client->dev, 743 &dev_attr_fan1_div)) 744 || (err = device_create_file(&new_client->dev, 745 &sensor_dev_attr_fan1_alarm.dev_attr))) 746 goto exit_remove; 747 } 748 749 if (data->channel & CHAN_NO_FAN(1)) { 750 if ((err = device_create_file(&new_client->dev, 751 &dev_attr_in7_input)) 752 || (err = device_create_file(&new_client->dev, 753 &dev_attr_in7_min)) 754 || (err = device_create_file(&new_client->dev, 755 &dev_attr_in7_max)) 756 || (err = device_create_file(&new_client->dev, 757 &sensor_dev_attr_in7_alarm.dev_attr))) 758 goto exit_remove; 759 } else { 760 if ((err = device_create_file(&new_client->dev, 761 &dev_attr_fan2_input)) 762 || (err = device_create_file(&new_client->dev, 763 &dev_attr_fan2_min)) 764 || (err = device_create_file(&new_client->dev, 765 &dev_attr_fan2_div)) 766 || (err = device_create_file(&new_client->dev, 767 &sensor_dev_attr_fan2_alarm.dev_attr))) 768 goto exit_remove; 769 } 770 771 if (data->channel & CHAN_TEMP3) { 772 if ((err = device_create_file(&new_client->dev, 773 &dev_attr_temp3_input)) 774 || (err = device_create_file(&new_client->dev, 775 &dev_attr_temp3_max)) 776 || (err = device_create_file(&new_client->dev, 777 &dev_attr_temp3_min)) 778 || (err = device_create_file(&new_client->dev, 779 &dev_attr_temp3_crit)) 780 || (err = device_create_file(&new_client->dev, 781 &sensor_dev_attr_temp3_alarm.dev_attr)) 782 || (err = device_create_file(&new_client->dev, 783 &sensor_dev_attr_temp3_fault.dev_attr))) 784 goto exit_remove; 785 } else { 786 if ((err = device_create_file(&new_client->dev, 787 &dev_attr_in0_input)) 788 || (err = device_create_file(&new_client->dev, 789 &dev_attr_in0_min)) 790 || (err = device_create_file(&new_client->dev, 791 &dev_attr_in0_max)) 792 || (err = device_create_file(&new_client->dev, 793 &sensor_dev_attr_in0_alarm.dev_attr)) 794 || (err = device_create_file(&new_client->dev, 795 &dev_attr_in5_input)) 796 || (err = device_create_file(&new_client->dev, 797 &dev_attr_in5_min)) 798 || (err = device_create_file(&new_client->dev, 799 &dev_attr_in5_max)) 800 || (err = device_create_file(&new_client->dev, 801 &sensor_dev_attr_in5_alarm.dev_attr))) 802 goto exit_remove; 803 } 804 805 if (!(data->channel & CHAN_NO_VID)) { 806 data->vrm = vid_which_vrm(); 807 if ((err = device_create_file(&new_client->dev, 808 &dev_attr_cpu0_vid)) 809 || (err = device_create_file(&new_client->dev, 810 &dev_attr_vrm))) 811 goto exit_remove; 812 } 813 814 data->hwmon_dev = hwmon_device_register(&new_client->dev); 815 if (IS_ERR(data->hwmon_dev)) { 816 err = PTR_ERR(data->hwmon_dev); 817 goto exit_remove; 818 } 819 820 return 0; 821 822 exit_remove: 823 sysfs_remove_group(&new_client->dev.kobj, &lm87_group); 824 sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt); 825 exit_free: 826 lm87_write_value(new_client, LM87_REG_CONFIG, data->config); 827 kfree(data); 828 exit: 829 return err; 830 } 831 832 static void lm87_init_client(struct i2c_client *client) 833 { 834 struct lm87_data *data = i2c_get_clientdata(client); 835 836 if (client->dev.platform_data) { 837 data->channel = *(u8 *)client->dev.platform_data; 838 lm87_write_value(client, 839 LM87_REG_CHANNEL_MODE, data->channel); 840 } else { 841 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE); 842 } 843 data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F; 844 845 if (!(data->config & 0x01)) { 846 int i; 847 848 /* Limits are left uninitialized after power-up */ 849 for (i = 1; i < 6; i++) { 850 lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00); 851 lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF); 852 } 853 for (i = 0; i < 2; i++) { 854 lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F); 855 lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00); 856 lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00); 857 lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF); 858 } 859 if (data->channel & CHAN_TEMP3) { 860 lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F); 861 lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00); 862 } else { 863 lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00); 864 lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF); 865 } 866 } 867 868 /* Make sure Start is set and INT#_Clear is clear */ 869 if ((data->config & 0x09) != 0x01) 870 lm87_write_value(client, LM87_REG_CONFIG, 871 (data->config & 0x77) | 0x01); 872 } 873 874 static int lm87_remove(struct i2c_client *client) 875 { 876 struct lm87_data *data = i2c_get_clientdata(client); 877 878 hwmon_device_unregister(data->hwmon_dev); 879 sysfs_remove_group(&client->dev.kobj, &lm87_group); 880 sysfs_remove_group(&client->dev.kobj, &lm87_group_opt); 881 882 lm87_write_value(client, LM87_REG_CONFIG, data->config); 883 kfree(data); 884 return 0; 885 } 886 887 static struct lm87_data *lm87_update_device(struct device *dev) 888 { 889 struct i2c_client *client = to_i2c_client(dev); 890 struct lm87_data *data = i2c_get_clientdata(client); 891 892 mutex_lock(&data->update_lock); 893 894 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 895 int i, j; 896 897 dev_dbg(&client->dev, "Updating data.\n"); 898 899 i = (data->channel & CHAN_TEMP3) ? 1 : 0; 900 j = (data->channel & CHAN_TEMP3) ? 5 : 6; 901 for (; i < j; i++) { 902 data->in[i] = lm87_read_value(client, 903 LM87_REG_IN(i)); 904 data->in_min[i] = lm87_read_value(client, 905 LM87_REG_IN_MIN(i)); 906 data->in_max[i] = lm87_read_value(client, 907 LM87_REG_IN_MAX(i)); 908 } 909 910 for (i = 0; i < 2; i++) { 911 if (data->channel & CHAN_NO_FAN(i)) { 912 data->in[6+i] = lm87_read_value(client, 913 LM87_REG_AIN(i)); 914 data->in_max[6+i] = lm87_read_value(client, 915 LM87_REG_AIN_MAX(i)); 916 data->in_min[6+i] = lm87_read_value(client, 917 LM87_REG_AIN_MIN(i)); 918 919 } else { 920 data->fan[i] = lm87_read_value(client, 921 LM87_REG_FAN(i)); 922 data->fan_min[i] = lm87_read_value(client, 923 LM87_REG_FAN_MIN(i)); 924 } 925 } 926 927 j = (data->channel & CHAN_TEMP3) ? 3 : 2; 928 for (i = 0 ; i < j; i++) { 929 data->temp[i] = lm87_read_value(client, 930 LM87_REG_TEMP[i]); 931 data->temp_high[i] = lm87_read_value(client, 932 LM87_REG_TEMP_HIGH[i]); 933 data->temp_low[i] = lm87_read_value(client, 934 LM87_REG_TEMP_LOW[i]); 935 } 936 937 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK); 938 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT); 939 data->temp_crit_int = min(i, j); 940 941 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK); 942 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT); 943 data->temp_crit_ext = min(i, j); 944 945 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV); 946 data->fan_div[0] = (i >> 4) & 0x03; 947 data->fan_div[1] = (i >> 6) & 0x03; 948 data->vid = (i & 0x0F) 949 | (lm87_read_value(client, LM87_REG_VID4) & 0x01) 950 << 4; 951 952 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1) 953 | (lm87_read_value(client, LM87_REG_ALARMS2) 954 << 8); 955 data->aout = lm87_read_value(client, LM87_REG_AOUT); 956 957 data->last_updated = jiffies; 958 data->valid = 1; 959 } 960 961 mutex_unlock(&data->update_lock); 962 963 return data; 964 } 965 966 module_i2c_driver(lm87_driver); 967 968 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others"); 969 MODULE_DESCRIPTION("LM87 driver"); 970 MODULE_LICENSE("GPL"); 971