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 /* 78 * Insmod parameters 79 */ 80 81 I2C_CLIENT_INSMOD_2(lm87, adm1024); 82 83 /* 84 * The LM87 registers 85 */ 86 87 /* nr in 0..5 */ 88 #define LM87_REG_IN(nr) (0x20 + (nr)) 89 #define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2) 90 #define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2) 91 /* nr in 0..1 */ 92 #define LM87_REG_AIN(nr) (0x28 + (nr)) 93 #define LM87_REG_AIN_MIN(nr) (0x1A + (nr)) 94 #define LM87_REG_AIN_MAX(nr) (0x3B + (nr)) 95 96 static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 }; 97 static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B }; 98 static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C }; 99 100 #define LM87_REG_TEMP_HW_INT_LOCK 0x13 101 #define LM87_REG_TEMP_HW_EXT_LOCK 0x14 102 #define LM87_REG_TEMP_HW_INT 0x17 103 #define LM87_REG_TEMP_HW_EXT 0x18 104 105 /* nr in 0..1 */ 106 #define LM87_REG_FAN(nr) (0x28 + (nr)) 107 #define LM87_REG_FAN_MIN(nr) (0x3B + (nr)) 108 #define LM87_REG_AOUT 0x19 109 110 #define LM87_REG_CONFIG 0x40 111 #define LM87_REG_CHANNEL_MODE 0x16 112 #define LM87_REG_VID_FAN_DIV 0x47 113 #define LM87_REG_VID4 0x49 114 115 #define LM87_REG_ALARMS1 0x41 116 #define LM87_REG_ALARMS2 0x42 117 118 #define LM87_REG_COMPANY_ID 0x3E 119 #define LM87_REG_REVISION 0x3F 120 121 /* 122 * Conversions and various macros 123 * The LM87 uses signed 8-bit values for temperatures. 124 */ 125 126 #define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) 127 #define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ 128 (val) * 192 >= (scale) * 255 ? 255 : \ 129 ((val) * 192 + (scale)/2) / (scale)) 130 131 #define TEMP_FROM_REG(reg) ((reg) * 1000) 132 #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ 133 (val) >= 126500 ? 127 : \ 134 (((val) < 0 ? (val)-500 : (val)+500) / 1000)) 135 136 #define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \ 137 (1350000 + (reg)*(div) / 2) / ((reg)*(div))) 138 #define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \ 139 (1350000 + (val)*(div) / 2) / ((val)*(div))) 140 141 #define FAN_DIV_FROM_REG(reg) (1 << (reg)) 142 143 /* analog out is 9.80mV/LSB */ 144 #define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10) 145 #define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \ 146 (val) >= 2500 ? 255 : \ 147 ((val) * 10 + 49) / 98) 148 149 /* nr in 0..1 */ 150 #define CHAN_NO_FAN(nr) (1 << (nr)) 151 #define CHAN_TEMP3 (1 << 2) 152 #define CHAN_VCC_5V (1 << 3) 153 #define CHAN_NO_VID (1 << 7) 154 155 /* 156 * Functions declaration 157 */ 158 159 static int lm87_probe(struct i2c_client *client, 160 const struct i2c_device_id *id); 161 static int lm87_detect(struct i2c_client *new_client, 162 struct i2c_board_info *info); 163 static void lm87_init_client(struct i2c_client *client); 164 static int lm87_remove(struct i2c_client *client); 165 static struct lm87_data *lm87_update_device(struct device *dev); 166 167 /* 168 * Driver data (common to all clients) 169 */ 170 171 static const struct i2c_device_id lm87_id[] = { 172 { "lm87", lm87 }, 173 { "adm1024", adm1024 }, 174 { } 175 }; 176 MODULE_DEVICE_TABLE(i2c, lm87_id); 177 178 static struct i2c_driver lm87_driver = { 179 .class = I2C_CLASS_HWMON, 180 .driver = { 181 .name = "lm87", 182 }, 183 .probe = lm87_probe, 184 .remove = lm87_remove, 185 .id_table = lm87_id, 186 .detect = lm87_detect, 187 .address_list = normal_i2c, 188 }; 189 190 /* 191 * Client data (each client gets its own) 192 */ 193 194 struct lm87_data { 195 struct device *hwmon_dev; 196 struct mutex update_lock; 197 char valid; /* zero until following fields are valid */ 198 unsigned long last_updated; /* In jiffies */ 199 200 u8 channel; /* register value */ 201 u8 config; /* original 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, 666 struct i2c_board_info *info) 667 { 668 struct i2c_adapter *adapter = new_client->adapter; 669 const char *name; 670 u8 cid, rev; 671 672 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 673 return -ENODEV; 674 675 if (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80) 676 return -ENODEV; 677 678 /* Now, we do the remaining detection. */ 679 cid = lm87_read_value(new_client, LM87_REG_COMPANY_ID); 680 rev = lm87_read_value(new_client, LM87_REG_REVISION); 681 682 if (cid == 0x02 /* National Semiconductor */ 683 && (rev >= 0x01 && rev <= 0x08)) 684 name = "lm87"; 685 else if (cid == 0x41 /* Analog Devices */ 686 && (rev & 0xf0) == 0x10) 687 name = "adm1024"; 688 else { 689 dev_dbg(&adapter->dev, "LM87 detection failed at 0x%02x\n", 690 new_client->addr); 691 return -ENODEV; 692 } 693 694 strlcpy(info->type, name, I2C_NAME_SIZE); 695 696 return 0; 697 } 698 699 static int lm87_probe(struct i2c_client *new_client, 700 const struct i2c_device_id *id) 701 { 702 struct lm87_data *data; 703 int err; 704 705 data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL); 706 if (!data) { 707 err = -ENOMEM; 708 goto exit; 709 } 710 711 i2c_set_clientdata(new_client, data); 712 data->valid = 0; 713 mutex_init(&data->update_lock); 714 715 /* Initialize the LM87 chip */ 716 lm87_init_client(new_client); 717 718 data->in_scale[0] = 2500; 719 data->in_scale[1] = 2700; 720 data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300; 721 data->in_scale[3] = 5000; 722 data->in_scale[4] = 12000; 723 data->in_scale[5] = 2700; 724 data->in_scale[6] = 1875; 725 data->in_scale[7] = 1875; 726 727 /* Register sysfs hooks */ 728 if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group))) 729 goto exit_free; 730 731 if (data->channel & CHAN_NO_FAN(0)) { 732 if ((err = device_create_file(&new_client->dev, 733 &dev_attr_in6_input)) 734 || (err = device_create_file(&new_client->dev, 735 &dev_attr_in6_min)) 736 || (err = device_create_file(&new_client->dev, 737 &dev_attr_in6_max)) 738 || (err = device_create_file(&new_client->dev, 739 &sensor_dev_attr_in6_alarm.dev_attr))) 740 goto exit_remove; 741 } else { 742 if ((err = device_create_file(&new_client->dev, 743 &dev_attr_fan1_input)) 744 || (err = device_create_file(&new_client->dev, 745 &dev_attr_fan1_min)) 746 || (err = device_create_file(&new_client->dev, 747 &dev_attr_fan1_div)) 748 || (err = device_create_file(&new_client->dev, 749 &sensor_dev_attr_fan1_alarm.dev_attr))) 750 goto exit_remove; 751 } 752 753 if (data->channel & CHAN_NO_FAN(1)) { 754 if ((err = device_create_file(&new_client->dev, 755 &dev_attr_in7_input)) 756 || (err = device_create_file(&new_client->dev, 757 &dev_attr_in7_min)) 758 || (err = device_create_file(&new_client->dev, 759 &dev_attr_in7_max)) 760 || (err = device_create_file(&new_client->dev, 761 &sensor_dev_attr_in7_alarm.dev_attr))) 762 goto exit_remove; 763 } else { 764 if ((err = device_create_file(&new_client->dev, 765 &dev_attr_fan2_input)) 766 || (err = device_create_file(&new_client->dev, 767 &dev_attr_fan2_min)) 768 || (err = device_create_file(&new_client->dev, 769 &dev_attr_fan2_div)) 770 || (err = device_create_file(&new_client->dev, 771 &sensor_dev_attr_fan2_alarm.dev_attr))) 772 goto exit_remove; 773 } 774 775 if (data->channel & CHAN_TEMP3) { 776 if ((err = device_create_file(&new_client->dev, 777 &dev_attr_temp3_input)) 778 || (err = device_create_file(&new_client->dev, 779 &dev_attr_temp3_max)) 780 || (err = device_create_file(&new_client->dev, 781 &dev_attr_temp3_min)) 782 || (err = device_create_file(&new_client->dev, 783 &dev_attr_temp3_crit)) 784 || (err = device_create_file(&new_client->dev, 785 &sensor_dev_attr_temp3_alarm.dev_attr)) 786 || (err = device_create_file(&new_client->dev, 787 &sensor_dev_attr_temp3_fault.dev_attr))) 788 goto exit_remove; 789 } else { 790 if ((err = device_create_file(&new_client->dev, 791 &dev_attr_in0_input)) 792 || (err = device_create_file(&new_client->dev, 793 &dev_attr_in0_min)) 794 || (err = device_create_file(&new_client->dev, 795 &dev_attr_in0_max)) 796 || (err = device_create_file(&new_client->dev, 797 &sensor_dev_attr_in0_alarm.dev_attr)) 798 || (err = device_create_file(&new_client->dev, 799 &dev_attr_in5_input)) 800 || (err = device_create_file(&new_client->dev, 801 &dev_attr_in5_min)) 802 || (err = device_create_file(&new_client->dev, 803 &dev_attr_in5_max)) 804 || (err = device_create_file(&new_client->dev, 805 &sensor_dev_attr_in5_alarm.dev_attr))) 806 goto exit_remove; 807 } 808 809 if (!(data->channel & CHAN_NO_VID)) { 810 data->vrm = vid_which_vrm(); 811 if ((err = device_create_file(&new_client->dev, 812 &dev_attr_cpu0_vid)) 813 || (err = device_create_file(&new_client->dev, 814 &dev_attr_vrm))) 815 goto exit_remove; 816 } 817 818 data->hwmon_dev = hwmon_device_register(&new_client->dev); 819 if (IS_ERR(data->hwmon_dev)) { 820 err = PTR_ERR(data->hwmon_dev); 821 goto exit_remove; 822 } 823 824 return 0; 825 826 exit_remove: 827 sysfs_remove_group(&new_client->dev.kobj, &lm87_group); 828 sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt); 829 exit_free: 830 lm87_write_value(new_client, LM87_REG_CONFIG, data->config); 831 kfree(data); 832 exit: 833 return err; 834 } 835 836 static void lm87_init_client(struct i2c_client *client) 837 { 838 struct lm87_data *data = i2c_get_clientdata(client); 839 840 if (client->dev.platform_data) { 841 data->channel = *(u8 *)client->dev.platform_data; 842 lm87_write_value(client, 843 LM87_REG_CHANNEL_MODE, data->channel); 844 } else { 845 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE); 846 } 847 data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F; 848 849 if (!(data->config & 0x01)) { 850 int i; 851 852 /* Limits are left uninitialized after power-up */ 853 for (i = 1; i < 6; i++) { 854 lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00); 855 lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF); 856 } 857 for (i = 0; i < 2; i++) { 858 lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F); 859 lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00); 860 lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00); 861 lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF); 862 } 863 if (data->channel & CHAN_TEMP3) { 864 lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F); 865 lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00); 866 } else { 867 lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00); 868 lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF); 869 } 870 } 871 872 /* Make sure Start is set and INT#_Clear is clear */ 873 if ((data->config & 0x09) != 0x01) 874 lm87_write_value(client, LM87_REG_CONFIG, 875 (data->config & 0x77) | 0x01); 876 } 877 878 static int lm87_remove(struct i2c_client *client) 879 { 880 struct lm87_data *data = i2c_get_clientdata(client); 881 882 hwmon_device_unregister(data->hwmon_dev); 883 sysfs_remove_group(&client->dev.kobj, &lm87_group); 884 sysfs_remove_group(&client->dev.kobj, &lm87_group_opt); 885 886 lm87_write_value(client, LM87_REG_CONFIG, data->config); 887 kfree(data); 888 return 0; 889 } 890 891 static struct lm87_data *lm87_update_device(struct device *dev) 892 { 893 struct i2c_client *client = to_i2c_client(dev); 894 struct lm87_data *data = i2c_get_clientdata(client); 895 896 mutex_lock(&data->update_lock); 897 898 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 899 int i, j; 900 901 dev_dbg(&client->dev, "Updating data.\n"); 902 903 i = (data->channel & CHAN_TEMP3) ? 1 : 0; 904 j = (data->channel & CHAN_TEMP3) ? 5 : 6; 905 for (; i < j; i++) { 906 data->in[i] = lm87_read_value(client, 907 LM87_REG_IN(i)); 908 data->in_min[i] = lm87_read_value(client, 909 LM87_REG_IN_MIN(i)); 910 data->in_max[i] = lm87_read_value(client, 911 LM87_REG_IN_MAX(i)); 912 } 913 914 for (i = 0; i < 2; i++) { 915 if (data->channel & CHAN_NO_FAN(i)) { 916 data->in[6+i] = lm87_read_value(client, 917 LM87_REG_AIN(i)); 918 data->in_max[6+i] = lm87_read_value(client, 919 LM87_REG_AIN_MAX(i)); 920 data->in_min[6+i] = lm87_read_value(client, 921 LM87_REG_AIN_MIN(i)); 922 923 } else { 924 data->fan[i] = lm87_read_value(client, 925 LM87_REG_FAN(i)); 926 data->fan_min[i] = lm87_read_value(client, 927 LM87_REG_FAN_MIN(i)); 928 } 929 } 930 931 j = (data->channel & CHAN_TEMP3) ? 3 : 2; 932 for (i = 0 ; i < j; i++) { 933 data->temp[i] = lm87_read_value(client, 934 LM87_REG_TEMP[i]); 935 data->temp_high[i] = lm87_read_value(client, 936 LM87_REG_TEMP_HIGH[i]); 937 data->temp_low[i] = lm87_read_value(client, 938 LM87_REG_TEMP_LOW[i]); 939 } 940 941 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK); 942 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT); 943 data->temp_crit_int = min(i, j); 944 945 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK); 946 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT); 947 data->temp_crit_ext = min(i, j); 948 949 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV); 950 data->fan_div[0] = (i >> 4) & 0x03; 951 data->fan_div[1] = (i >> 6) & 0x03; 952 data->vid = (i & 0x0F) 953 | (lm87_read_value(client, LM87_REG_VID4) & 0x01) 954 << 4; 955 956 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1) 957 | (lm87_read_value(client, LM87_REG_ALARMS2) 958 << 8); 959 data->aout = lm87_read_value(client, LM87_REG_AOUT); 960 961 data->last_updated = jiffies; 962 data->valid = 1; 963 } 964 965 mutex_unlock(&data->update_lock); 966 967 return data; 968 } 969 970 static int __init sensors_lm87_init(void) 971 { 972 return i2c_add_driver(&lm87_driver); 973 } 974 975 static void __exit sensors_lm87_exit(void) 976 { 977 i2c_del_driver(&lm87_driver); 978 } 979 980 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others"); 981 MODULE_DESCRIPTION("LM87 driver"); 982 MODULE_LICENSE("GPL"); 983 984 module_init(sensors_lm87_init); 985 module_exit(sensors_lm87_exit); 986