1 /* 2 lm85.c - Part of lm_sensors, Linux kernel modules for hardware 3 monitoring 4 Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> 5 Copyright (c) 2002, 2003 Philip Pokorny <ppokorny@penguincomputing.com> 6 Copyright (c) 2003 Margit Schubert-While <margitsw@t-online.de> 7 Copyright (c) 2004 Justin Thiessen <jthiessen@penguincomputing.com> 8 Copyright (C) 2007--2009 Jean Delvare <khali@linux-fr.org> 9 10 Chip details at <http://www.national.com/ds/LM/LM85.pdf> 11 12 This program is free software; you can redistribute it and/or modify 13 it under the terms of the GNU General Public License as published by 14 the Free Software Foundation; either version 2 of the License, or 15 (at your option) any later version. 16 17 This program is distributed in the hope that it will be useful, 18 but WITHOUT ANY WARRANTY; without even the implied warranty of 19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 GNU General Public License for more details. 21 22 You should have received a copy of the GNU General Public License 23 along with this program; if not, write to the Free Software 24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 25 */ 26 27 #include <linux/module.h> 28 #include <linux/init.h> 29 #include <linux/slab.h> 30 #include <linux/jiffies.h> 31 #include <linux/i2c.h> 32 #include <linux/hwmon.h> 33 #include <linux/hwmon-vid.h> 34 #include <linux/hwmon-sysfs.h> 35 #include <linux/err.h> 36 #include <linux/mutex.h> 37 38 /* Addresses to scan */ 39 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; 40 41 enum chips { 42 any_chip, lm85b, lm85c, 43 adm1027, adt7463, adt7468, 44 emc6d100, emc6d102 45 }; 46 47 /* The LM85 registers */ 48 49 #define LM85_REG_IN(nr) (0x20 + (nr)) 50 #define LM85_REG_IN_MIN(nr) (0x44 + (nr) * 2) 51 #define LM85_REG_IN_MAX(nr) (0x45 + (nr) * 2) 52 53 #define LM85_REG_TEMP(nr) (0x25 + (nr)) 54 #define LM85_REG_TEMP_MIN(nr) (0x4e + (nr) * 2) 55 #define LM85_REG_TEMP_MAX(nr) (0x4f + (nr) * 2) 56 57 /* Fan speeds are LSB, MSB (2 bytes) */ 58 #define LM85_REG_FAN(nr) (0x28 + (nr) * 2) 59 #define LM85_REG_FAN_MIN(nr) (0x54 + (nr) * 2) 60 61 #define LM85_REG_PWM(nr) (0x30 + (nr)) 62 63 #define LM85_REG_COMPANY 0x3e 64 #define LM85_REG_VERSTEP 0x3f 65 66 #define ADT7468_REG_CFG5 0x7c 67 #define ADT7468_OFF64 (1 << 0) 68 #define ADT7468_HFPWM (1 << 1) 69 #define IS_ADT7468_OFF64(data) \ 70 ((data)->type == adt7468 && !((data)->cfg5 & ADT7468_OFF64)) 71 #define IS_ADT7468_HFPWM(data) \ 72 ((data)->type == adt7468 && !((data)->cfg5 & ADT7468_HFPWM)) 73 74 /* These are the recognized values for the above regs */ 75 #define LM85_COMPANY_NATIONAL 0x01 76 #define LM85_COMPANY_ANALOG_DEV 0x41 77 #define LM85_COMPANY_SMSC 0x5c 78 #define LM85_VERSTEP_VMASK 0xf0 79 #define LM85_VERSTEP_GENERIC 0x60 80 #define LM85_VERSTEP_GENERIC2 0x70 81 #define LM85_VERSTEP_LM85C 0x60 82 #define LM85_VERSTEP_LM85B 0x62 83 #define LM85_VERSTEP_LM96000_1 0x68 84 #define LM85_VERSTEP_LM96000_2 0x69 85 #define LM85_VERSTEP_ADM1027 0x60 86 #define LM85_VERSTEP_ADT7463 0x62 87 #define LM85_VERSTEP_ADT7463C 0x6A 88 #define LM85_VERSTEP_ADT7468_1 0x71 89 #define LM85_VERSTEP_ADT7468_2 0x72 90 #define LM85_VERSTEP_EMC6D100_A0 0x60 91 #define LM85_VERSTEP_EMC6D100_A1 0x61 92 #define LM85_VERSTEP_EMC6D102 0x65 93 94 #define LM85_REG_CONFIG 0x40 95 96 #define LM85_REG_ALARM1 0x41 97 #define LM85_REG_ALARM2 0x42 98 99 #define LM85_REG_VID 0x43 100 101 /* Automated FAN control */ 102 #define LM85_REG_AFAN_CONFIG(nr) (0x5c + (nr)) 103 #define LM85_REG_AFAN_RANGE(nr) (0x5f + (nr)) 104 #define LM85_REG_AFAN_SPIKE1 0x62 105 #define LM85_REG_AFAN_MINPWM(nr) (0x64 + (nr)) 106 #define LM85_REG_AFAN_LIMIT(nr) (0x67 + (nr)) 107 #define LM85_REG_AFAN_CRITICAL(nr) (0x6a + (nr)) 108 #define LM85_REG_AFAN_HYST1 0x6d 109 #define LM85_REG_AFAN_HYST2 0x6e 110 111 #define ADM1027_REG_EXTEND_ADC1 0x76 112 #define ADM1027_REG_EXTEND_ADC2 0x77 113 114 #define EMC6D100_REG_ALARM3 0x7d 115 /* IN5, IN6 and IN7 */ 116 #define EMC6D100_REG_IN(nr) (0x70 + ((nr) - 5)) 117 #define EMC6D100_REG_IN_MIN(nr) (0x73 + ((nr) - 5) * 2) 118 #define EMC6D100_REG_IN_MAX(nr) (0x74 + ((nr) - 5) * 2) 119 #define EMC6D102_REG_EXTEND_ADC1 0x85 120 #define EMC6D102_REG_EXTEND_ADC2 0x86 121 #define EMC6D102_REG_EXTEND_ADC3 0x87 122 #define EMC6D102_REG_EXTEND_ADC4 0x88 123 124 125 /* Conversions. Rounding and limit checking is only done on the TO_REG 126 variants. Note that you should be a bit careful with which arguments 127 these macros are called: arguments may be evaluated more than once. 128 */ 129 130 /* IN are scaled acording to built-in resistors */ 131 static const int lm85_scaling[] = { /* .001 Volts */ 132 2500, 2250, 3300, 5000, 12000, 133 3300, 1500, 1800 /*EMC6D100*/ 134 }; 135 #define SCALE(val, from, to) (((val) * (to) + ((from) / 2)) / (from)) 136 137 #define INS_TO_REG(n, val) \ 138 SENSORS_LIMIT(SCALE(val, lm85_scaling[n], 192), 0, 255) 139 140 #define INSEXT_FROM_REG(n, val, ext) \ 141 SCALE(((val) << 4) + (ext), 192 << 4, lm85_scaling[n]) 142 143 #define INS_FROM_REG(n, val) SCALE((val), 192, lm85_scaling[n]) 144 145 /* FAN speed is measured using 90kHz clock */ 146 static inline u16 FAN_TO_REG(unsigned long val) 147 { 148 if (!val) 149 return 0xffff; 150 return SENSORS_LIMIT(5400000 / val, 1, 0xfffe); 151 } 152 #define FAN_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \ 153 5400000 / (val)) 154 155 /* Temperature is reported in .001 degC increments */ 156 #define TEMP_TO_REG(val) \ 157 SENSORS_LIMIT(SCALE(val, 1000, 1), -127, 127) 158 #define TEMPEXT_FROM_REG(val, ext) \ 159 SCALE(((val) << 4) + (ext), 16, 1000) 160 #define TEMP_FROM_REG(val) ((val) * 1000) 161 162 #define PWM_TO_REG(val) SENSORS_LIMIT(val, 0, 255) 163 #define PWM_FROM_REG(val) (val) 164 165 166 /* ZONEs have the following parameters: 167 * Limit (low) temp, 1. degC 168 * Hysteresis (below limit), 1. degC (0-15) 169 * Range of speed control, .1 degC (2-80) 170 * Critical (high) temp, 1. degC 171 * 172 * FAN PWMs have the following parameters: 173 * Reference Zone, 1, 2, 3, etc. 174 * Spinup time, .05 sec 175 * PWM value at limit/low temp, 1 count 176 * PWM Frequency, 1. Hz 177 * PWM is Min or OFF below limit, flag 178 * Invert PWM output, flag 179 * 180 * Some chips filter the temp, others the fan. 181 * Filter constant (or disabled) .1 seconds 182 */ 183 184 /* These are the zone temperature range encodings in .001 degree C */ 185 static const int lm85_range_map[] = { 186 2000, 2500, 3300, 4000, 5000, 6600, 8000, 10000, 187 13300, 16000, 20000, 26600, 32000, 40000, 53300, 80000 188 }; 189 190 static int RANGE_TO_REG(int range) 191 { 192 int i; 193 194 /* Find the closest match */ 195 for (i = 0; i < 15; ++i) { 196 if (range <= (lm85_range_map[i] + lm85_range_map[i + 1]) / 2) 197 break; 198 } 199 200 return i; 201 } 202 #define RANGE_FROM_REG(val) lm85_range_map[(val) & 0x0f] 203 204 /* These are the PWM frequency encodings */ 205 static const int lm85_freq_map[8] = { /* 1 Hz */ 206 10, 15, 23, 30, 38, 47, 61, 94 207 }; 208 static const int adm1027_freq_map[8] = { /* 1 Hz */ 209 11, 15, 22, 29, 35, 44, 59, 88 210 }; 211 212 static int FREQ_TO_REG(const int *map, int freq) 213 { 214 int i; 215 216 /* Find the closest match */ 217 for (i = 0; i < 7; ++i) 218 if (freq <= (map[i] + map[i + 1]) / 2) 219 break; 220 return i; 221 } 222 223 static int FREQ_FROM_REG(const int *map, u8 reg) 224 { 225 return map[reg & 0x07]; 226 } 227 228 /* Since we can't use strings, I'm abusing these numbers 229 * to stand in for the following meanings: 230 * 1 -- PWM responds to Zone 1 231 * 2 -- PWM responds to Zone 2 232 * 3 -- PWM responds to Zone 3 233 * 23 -- PWM responds to the higher temp of Zone 2 or 3 234 * 123 -- PWM responds to highest of Zone 1, 2, or 3 235 * 0 -- PWM is always at 0% (ie, off) 236 * -1 -- PWM is always at 100% 237 * -2 -- PWM responds to manual control 238 */ 239 240 static const int lm85_zone_map[] = { 1, 2, 3, -1, 0, 23, 123, -2 }; 241 #define ZONE_FROM_REG(val) lm85_zone_map[(val) >> 5] 242 243 static int ZONE_TO_REG(int zone) 244 { 245 int i; 246 247 for (i = 0; i <= 7; ++i) 248 if (zone == lm85_zone_map[i]) 249 break; 250 if (i > 7) /* Not found. */ 251 i = 3; /* Always 100% */ 252 return i << 5; 253 } 254 255 #define HYST_TO_REG(val) SENSORS_LIMIT(((val) + 500) / 1000, 0, 15) 256 #define HYST_FROM_REG(val) ((val) * 1000) 257 258 /* Chip sampling rates 259 * 260 * Some sensors are not updated more frequently than once per second 261 * so it doesn't make sense to read them more often than that. 262 * We cache the results and return the saved data if the driver 263 * is called again before a second has elapsed. 264 * 265 * Also, there is significant configuration data for this chip 266 * given the automatic PWM fan control that is possible. There 267 * are about 47 bytes of config data to only 22 bytes of actual 268 * readings. So, we keep the config data up to date in the cache 269 * when it is written and only sample it once every 1 *minute* 270 */ 271 #define LM85_DATA_INTERVAL (HZ + HZ / 2) 272 #define LM85_CONFIG_INTERVAL (1 * 60 * HZ) 273 274 /* LM85 can automatically adjust fan speeds based on temperature 275 * This structure encapsulates an entire Zone config. There are 276 * three zones (one for each temperature input) on the lm85 277 */ 278 struct lm85_zone { 279 s8 limit; /* Low temp limit */ 280 u8 hyst; /* Low limit hysteresis. (0-15) */ 281 u8 range; /* Temp range, encoded */ 282 s8 critical; /* "All fans ON" temp limit */ 283 u8 off_desired; /* Actual "off" temperature specified. Preserved 284 * to prevent "drift" as other autofan control 285 * values change. 286 */ 287 u8 max_desired; /* Actual "max" temperature specified. Preserved 288 * to prevent "drift" as other autofan control 289 * values change. 290 */ 291 }; 292 293 struct lm85_autofan { 294 u8 config; /* Register value */ 295 u8 min_pwm; /* Minimum PWM value, encoded */ 296 u8 min_off; /* Min PWM or OFF below "limit", flag */ 297 }; 298 299 /* For each registered chip, we need to keep some data in memory. 300 The structure is dynamically allocated. */ 301 struct lm85_data { 302 struct device *hwmon_dev; 303 const int *freq_map; 304 enum chips type; 305 306 struct mutex update_lock; 307 int valid; /* !=0 if following fields are valid */ 308 unsigned long last_reading; /* In jiffies */ 309 unsigned long last_config; /* In jiffies */ 310 311 u8 in[8]; /* Register value */ 312 u8 in_max[8]; /* Register value */ 313 u8 in_min[8]; /* Register value */ 314 s8 temp[3]; /* Register value */ 315 s8 temp_min[3]; /* Register value */ 316 s8 temp_max[3]; /* Register value */ 317 u16 fan[4]; /* Register value */ 318 u16 fan_min[4]; /* Register value */ 319 u8 pwm[3]; /* Register value */ 320 u8 pwm_freq[3]; /* Register encoding */ 321 u8 temp_ext[3]; /* Decoded values */ 322 u8 in_ext[8]; /* Decoded values */ 323 u8 vid; /* Register value */ 324 u8 vrm; /* VRM version */ 325 u32 alarms; /* Register encoding, combined */ 326 u8 cfg5; /* Config Register 5 on ADT7468 */ 327 struct lm85_autofan autofan[3]; 328 struct lm85_zone zone[3]; 329 }; 330 331 static int lm85_detect(struct i2c_client *client, struct i2c_board_info *info); 332 static int lm85_probe(struct i2c_client *client, 333 const struct i2c_device_id *id); 334 static int lm85_remove(struct i2c_client *client); 335 336 static int lm85_read_value(struct i2c_client *client, u8 reg); 337 static void lm85_write_value(struct i2c_client *client, u8 reg, int value); 338 static struct lm85_data *lm85_update_device(struct device *dev); 339 340 341 static const struct i2c_device_id lm85_id[] = { 342 { "adm1027", adm1027 }, 343 { "adt7463", adt7463 }, 344 { "adt7468", adt7468 }, 345 { "lm85", any_chip }, 346 { "lm85b", lm85b }, 347 { "lm85c", lm85c }, 348 { "emc6d100", emc6d100 }, 349 { "emc6d101", emc6d100 }, 350 { "emc6d102", emc6d102 }, 351 { } 352 }; 353 MODULE_DEVICE_TABLE(i2c, lm85_id); 354 355 static struct i2c_driver lm85_driver = { 356 .class = I2C_CLASS_HWMON, 357 .driver = { 358 .name = "lm85", 359 }, 360 .probe = lm85_probe, 361 .remove = lm85_remove, 362 .id_table = lm85_id, 363 .detect = lm85_detect, 364 .address_list = normal_i2c, 365 }; 366 367 368 /* 4 Fans */ 369 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 370 char *buf) 371 { 372 int nr = to_sensor_dev_attr(attr)->index; 373 struct lm85_data *data = lm85_update_device(dev); 374 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr])); 375 } 376 377 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 378 char *buf) 379 { 380 int nr = to_sensor_dev_attr(attr)->index; 381 struct lm85_data *data = lm85_update_device(dev); 382 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr])); 383 } 384 385 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 386 const char *buf, size_t count) 387 { 388 int nr = to_sensor_dev_attr(attr)->index; 389 struct i2c_client *client = to_i2c_client(dev); 390 struct lm85_data *data = i2c_get_clientdata(client); 391 unsigned long val = simple_strtoul(buf, NULL, 10); 392 393 mutex_lock(&data->update_lock); 394 data->fan_min[nr] = FAN_TO_REG(val); 395 lm85_write_value(client, LM85_REG_FAN_MIN(nr), data->fan_min[nr]); 396 mutex_unlock(&data->update_lock); 397 return count; 398 } 399 400 #define show_fan_offset(offset) \ 401 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 402 show_fan, NULL, offset - 1); \ 403 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 404 show_fan_min, set_fan_min, offset - 1) 405 406 show_fan_offset(1); 407 show_fan_offset(2); 408 show_fan_offset(3); 409 show_fan_offset(4); 410 411 /* vid, vrm, alarms */ 412 413 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr, 414 char *buf) 415 { 416 struct lm85_data *data = lm85_update_device(dev); 417 int vid; 418 419 if ((data->type == adt7463 || data->type == adt7468) && 420 (data->vid & 0x80)) { 421 /* 6-pin VID (VRM 10) */ 422 vid = vid_from_reg(data->vid & 0x3f, data->vrm); 423 } else { 424 /* 5-pin VID (VRM 9) */ 425 vid = vid_from_reg(data->vid & 0x1f, data->vrm); 426 } 427 428 return sprintf(buf, "%d\n", vid); 429 } 430 431 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 432 433 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr, 434 char *buf) 435 { 436 struct lm85_data *data = dev_get_drvdata(dev); 437 return sprintf(buf, "%ld\n", (long) data->vrm); 438 } 439 440 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr, 441 const char *buf, size_t count) 442 { 443 struct lm85_data *data = dev_get_drvdata(dev); 444 data->vrm = simple_strtoul(buf, NULL, 10); 445 return count; 446 } 447 448 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 449 450 static ssize_t show_alarms_reg(struct device *dev, struct device_attribute 451 *attr, char *buf) 452 { 453 struct lm85_data *data = lm85_update_device(dev); 454 return sprintf(buf, "%u\n", data->alarms); 455 } 456 457 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL); 458 459 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 460 char *buf) 461 { 462 int nr = to_sensor_dev_attr(attr)->index; 463 struct lm85_data *data = lm85_update_device(dev); 464 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); 465 } 466 467 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 468 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 469 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 470 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 471 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 472 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 18); 473 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 16); 474 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 17); 475 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 476 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14); 477 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); 478 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 6); 479 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15); 480 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10); 481 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11); 482 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 12); 483 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 13); 484 485 /* pwm */ 486 487 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 488 char *buf) 489 { 490 int nr = to_sensor_dev_attr(attr)->index; 491 struct lm85_data *data = lm85_update_device(dev); 492 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr])); 493 } 494 495 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 496 const char *buf, size_t count) 497 { 498 int nr = to_sensor_dev_attr(attr)->index; 499 struct i2c_client *client = to_i2c_client(dev); 500 struct lm85_data *data = i2c_get_clientdata(client); 501 long val = simple_strtol(buf, NULL, 10); 502 503 mutex_lock(&data->update_lock); 504 data->pwm[nr] = PWM_TO_REG(val); 505 lm85_write_value(client, LM85_REG_PWM(nr), data->pwm[nr]); 506 mutex_unlock(&data->update_lock); 507 return count; 508 } 509 510 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute 511 *attr, char *buf) 512 { 513 int nr = to_sensor_dev_attr(attr)->index; 514 struct lm85_data *data = lm85_update_device(dev); 515 int pwm_zone, enable; 516 517 pwm_zone = ZONE_FROM_REG(data->autofan[nr].config); 518 switch (pwm_zone) { 519 case -1: /* PWM is always at 100% */ 520 enable = 0; 521 break; 522 case 0: /* PWM is always at 0% */ 523 case -2: /* PWM responds to manual control */ 524 enable = 1; 525 break; 526 default: /* PWM in automatic mode */ 527 enable = 2; 528 } 529 return sprintf(buf, "%d\n", enable); 530 } 531 532 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute 533 *attr, const char *buf, size_t count) 534 { 535 int nr = to_sensor_dev_attr(attr)->index; 536 struct i2c_client *client = to_i2c_client(dev); 537 struct lm85_data *data = i2c_get_clientdata(client); 538 long val = simple_strtol(buf, NULL, 10); 539 u8 config; 540 541 switch (val) { 542 case 0: 543 config = 3; 544 break; 545 case 1: 546 config = 7; 547 break; 548 case 2: 549 /* Here we have to choose arbitrarily one of the 5 possible 550 configurations; I go for the safest */ 551 config = 6; 552 break; 553 default: 554 return -EINVAL; 555 } 556 557 mutex_lock(&data->update_lock); 558 data->autofan[nr].config = lm85_read_value(client, 559 LM85_REG_AFAN_CONFIG(nr)); 560 data->autofan[nr].config = (data->autofan[nr].config & ~0xe0) 561 | (config << 5); 562 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr), 563 data->autofan[nr].config); 564 mutex_unlock(&data->update_lock); 565 return count; 566 } 567 568 static ssize_t show_pwm_freq(struct device *dev, 569 struct device_attribute *attr, char *buf) 570 { 571 int nr = to_sensor_dev_attr(attr)->index; 572 struct lm85_data *data = lm85_update_device(dev); 573 int freq; 574 575 if (IS_ADT7468_HFPWM(data)) 576 freq = 22500; 577 else 578 freq = FREQ_FROM_REG(data->freq_map, data->pwm_freq[nr]); 579 580 return sprintf(buf, "%d\n", freq); 581 } 582 583 static ssize_t set_pwm_freq(struct device *dev, 584 struct device_attribute *attr, const char *buf, size_t count) 585 { 586 int nr = to_sensor_dev_attr(attr)->index; 587 struct i2c_client *client = to_i2c_client(dev); 588 struct lm85_data *data = i2c_get_clientdata(client); 589 long val = simple_strtol(buf, NULL, 10); 590 591 mutex_lock(&data->update_lock); 592 /* The ADT7468 has a special high-frequency PWM output mode, 593 * where all PWM outputs are driven by a 22.5 kHz clock. 594 * This might confuse the user, but there's not much we can do. */ 595 if (data->type == adt7468 && val >= 11300) { /* High freq. mode */ 596 data->cfg5 &= ~ADT7468_HFPWM; 597 lm85_write_value(client, ADT7468_REG_CFG5, data->cfg5); 598 } else { /* Low freq. mode */ 599 data->pwm_freq[nr] = FREQ_TO_REG(data->freq_map, val); 600 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr), 601 (data->zone[nr].range << 4) 602 | data->pwm_freq[nr]); 603 if (data->type == adt7468) { 604 data->cfg5 |= ADT7468_HFPWM; 605 lm85_write_value(client, ADT7468_REG_CFG5, data->cfg5); 606 } 607 } 608 mutex_unlock(&data->update_lock); 609 return count; 610 } 611 612 #define show_pwm_reg(offset) \ 613 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 614 show_pwm, set_pwm, offset - 1); \ 615 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 616 show_pwm_enable, set_pwm_enable, offset - 1); \ 617 static SENSOR_DEVICE_ATTR(pwm##offset##_freq, S_IRUGO | S_IWUSR, \ 618 show_pwm_freq, set_pwm_freq, offset - 1) 619 620 show_pwm_reg(1); 621 show_pwm_reg(2); 622 show_pwm_reg(3); 623 624 /* Voltages */ 625 626 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 627 char *buf) 628 { 629 int nr = to_sensor_dev_attr(attr)->index; 630 struct lm85_data *data = lm85_update_device(dev); 631 return sprintf(buf, "%d\n", INSEXT_FROM_REG(nr, data->in[nr], 632 data->in_ext[nr])); 633 } 634 635 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 636 char *buf) 637 { 638 int nr = to_sensor_dev_attr(attr)->index; 639 struct lm85_data *data = lm85_update_device(dev); 640 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_min[nr])); 641 } 642 643 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 644 const char *buf, size_t count) 645 { 646 int nr = to_sensor_dev_attr(attr)->index; 647 struct i2c_client *client = to_i2c_client(dev); 648 struct lm85_data *data = i2c_get_clientdata(client); 649 long val = simple_strtol(buf, NULL, 10); 650 651 mutex_lock(&data->update_lock); 652 data->in_min[nr] = INS_TO_REG(nr, val); 653 lm85_write_value(client, LM85_REG_IN_MIN(nr), data->in_min[nr]); 654 mutex_unlock(&data->update_lock); 655 return count; 656 } 657 658 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 659 char *buf) 660 { 661 int nr = to_sensor_dev_attr(attr)->index; 662 struct lm85_data *data = lm85_update_device(dev); 663 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_max[nr])); 664 } 665 666 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 667 const char *buf, size_t count) 668 { 669 int nr = to_sensor_dev_attr(attr)->index; 670 struct i2c_client *client = to_i2c_client(dev); 671 struct lm85_data *data = i2c_get_clientdata(client); 672 long val = simple_strtol(buf, NULL, 10); 673 674 mutex_lock(&data->update_lock); 675 data->in_max[nr] = INS_TO_REG(nr, val); 676 lm85_write_value(client, LM85_REG_IN_MAX(nr), data->in_max[nr]); 677 mutex_unlock(&data->update_lock); 678 return count; 679 } 680 681 #define show_in_reg(offset) \ 682 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 683 show_in, NULL, offset); \ 684 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 685 show_in_min, set_in_min, offset); \ 686 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 687 show_in_max, set_in_max, offset) 688 689 show_in_reg(0); 690 show_in_reg(1); 691 show_in_reg(2); 692 show_in_reg(3); 693 show_in_reg(4); 694 show_in_reg(5); 695 show_in_reg(6); 696 show_in_reg(7); 697 698 /* Temps */ 699 700 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 701 char *buf) 702 { 703 int nr = to_sensor_dev_attr(attr)->index; 704 struct lm85_data *data = lm85_update_device(dev); 705 return sprintf(buf, "%d\n", TEMPEXT_FROM_REG(data->temp[nr], 706 data->temp_ext[nr])); 707 } 708 709 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 710 char *buf) 711 { 712 int nr = to_sensor_dev_attr(attr)->index; 713 struct lm85_data *data = lm85_update_device(dev); 714 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr])); 715 } 716 717 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 718 const char *buf, size_t count) 719 { 720 int nr = to_sensor_dev_attr(attr)->index; 721 struct i2c_client *client = to_i2c_client(dev); 722 struct lm85_data *data = i2c_get_clientdata(client); 723 long val = simple_strtol(buf, NULL, 10); 724 725 if (IS_ADT7468_OFF64(data)) 726 val += 64; 727 728 mutex_lock(&data->update_lock); 729 data->temp_min[nr] = TEMP_TO_REG(val); 730 lm85_write_value(client, LM85_REG_TEMP_MIN(nr), data->temp_min[nr]); 731 mutex_unlock(&data->update_lock); 732 return count; 733 } 734 735 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 736 char *buf) 737 { 738 int nr = to_sensor_dev_attr(attr)->index; 739 struct lm85_data *data = lm85_update_device(dev); 740 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr])); 741 } 742 743 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 744 const char *buf, size_t count) 745 { 746 int nr = to_sensor_dev_attr(attr)->index; 747 struct i2c_client *client = to_i2c_client(dev); 748 struct lm85_data *data = i2c_get_clientdata(client); 749 long val = simple_strtol(buf, NULL, 10); 750 751 if (IS_ADT7468_OFF64(data)) 752 val += 64; 753 754 mutex_lock(&data->update_lock); 755 data->temp_max[nr] = TEMP_TO_REG(val); 756 lm85_write_value(client, LM85_REG_TEMP_MAX(nr), data->temp_max[nr]); 757 mutex_unlock(&data->update_lock); 758 return count; 759 } 760 761 #define show_temp_reg(offset) \ 762 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 763 show_temp, NULL, offset - 1); \ 764 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 765 show_temp_min, set_temp_min, offset - 1); \ 766 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 767 show_temp_max, set_temp_max, offset - 1); 768 769 show_temp_reg(1); 770 show_temp_reg(2); 771 show_temp_reg(3); 772 773 774 /* Automatic PWM control */ 775 776 static ssize_t show_pwm_auto_channels(struct device *dev, 777 struct device_attribute *attr, char *buf) 778 { 779 int nr = to_sensor_dev_attr(attr)->index; 780 struct lm85_data *data = lm85_update_device(dev); 781 return sprintf(buf, "%d\n", ZONE_FROM_REG(data->autofan[nr].config)); 782 } 783 784 static ssize_t set_pwm_auto_channels(struct device *dev, 785 struct device_attribute *attr, const char *buf, size_t count) 786 { 787 int nr = to_sensor_dev_attr(attr)->index; 788 struct i2c_client *client = to_i2c_client(dev); 789 struct lm85_data *data = i2c_get_clientdata(client); 790 long val = simple_strtol(buf, NULL, 10); 791 792 mutex_lock(&data->update_lock); 793 data->autofan[nr].config = (data->autofan[nr].config & (~0xe0)) 794 | ZONE_TO_REG(val); 795 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr), 796 data->autofan[nr].config); 797 mutex_unlock(&data->update_lock); 798 return count; 799 } 800 801 static ssize_t show_pwm_auto_pwm_min(struct device *dev, 802 struct device_attribute *attr, char *buf) 803 { 804 int nr = to_sensor_dev_attr(attr)->index; 805 struct lm85_data *data = lm85_update_device(dev); 806 return sprintf(buf, "%d\n", PWM_FROM_REG(data->autofan[nr].min_pwm)); 807 } 808 809 static ssize_t set_pwm_auto_pwm_min(struct device *dev, 810 struct device_attribute *attr, const char *buf, size_t count) 811 { 812 int nr = to_sensor_dev_attr(attr)->index; 813 struct i2c_client *client = to_i2c_client(dev); 814 struct lm85_data *data = i2c_get_clientdata(client); 815 long val = simple_strtol(buf, NULL, 10); 816 817 mutex_lock(&data->update_lock); 818 data->autofan[nr].min_pwm = PWM_TO_REG(val); 819 lm85_write_value(client, LM85_REG_AFAN_MINPWM(nr), 820 data->autofan[nr].min_pwm); 821 mutex_unlock(&data->update_lock); 822 return count; 823 } 824 825 static ssize_t show_pwm_auto_pwm_minctl(struct device *dev, 826 struct device_attribute *attr, char *buf) 827 { 828 int nr = to_sensor_dev_attr(attr)->index; 829 struct lm85_data *data = lm85_update_device(dev); 830 return sprintf(buf, "%d\n", data->autofan[nr].min_off); 831 } 832 833 static ssize_t set_pwm_auto_pwm_minctl(struct device *dev, 834 struct device_attribute *attr, const char *buf, size_t count) 835 { 836 int nr = to_sensor_dev_attr(attr)->index; 837 struct i2c_client *client = to_i2c_client(dev); 838 struct lm85_data *data = i2c_get_clientdata(client); 839 long val = simple_strtol(buf, NULL, 10); 840 u8 tmp; 841 842 mutex_lock(&data->update_lock); 843 data->autofan[nr].min_off = val; 844 tmp = lm85_read_value(client, LM85_REG_AFAN_SPIKE1); 845 tmp &= ~(0x20 << nr); 846 if (data->autofan[nr].min_off) 847 tmp |= 0x20 << nr; 848 lm85_write_value(client, LM85_REG_AFAN_SPIKE1, tmp); 849 mutex_unlock(&data->update_lock); 850 return count; 851 } 852 853 #define pwm_auto(offset) \ 854 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels, \ 855 S_IRUGO | S_IWUSR, show_pwm_auto_channels, \ 856 set_pwm_auto_channels, offset - 1); \ 857 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_min, \ 858 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_min, \ 859 set_pwm_auto_pwm_min, offset - 1); \ 860 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_minctl, \ 861 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_minctl, \ 862 set_pwm_auto_pwm_minctl, offset - 1) 863 864 pwm_auto(1); 865 pwm_auto(2); 866 pwm_auto(3); 867 868 /* Temperature settings for automatic PWM control */ 869 870 static ssize_t show_temp_auto_temp_off(struct device *dev, 871 struct device_attribute *attr, char *buf) 872 { 873 int nr = to_sensor_dev_attr(attr)->index; 874 struct lm85_data *data = lm85_update_device(dev); 875 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) - 876 HYST_FROM_REG(data->zone[nr].hyst)); 877 } 878 879 static ssize_t set_temp_auto_temp_off(struct device *dev, 880 struct device_attribute *attr, const char *buf, size_t count) 881 { 882 int nr = to_sensor_dev_attr(attr)->index; 883 struct i2c_client *client = to_i2c_client(dev); 884 struct lm85_data *data = i2c_get_clientdata(client); 885 int min; 886 long val = simple_strtol(buf, NULL, 10); 887 888 mutex_lock(&data->update_lock); 889 min = TEMP_FROM_REG(data->zone[nr].limit); 890 data->zone[nr].off_desired = TEMP_TO_REG(val); 891 data->zone[nr].hyst = HYST_TO_REG(min - val); 892 if (nr == 0 || nr == 1) { 893 lm85_write_value(client, LM85_REG_AFAN_HYST1, 894 (data->zone[0].hyst << 4) 895 | data->zone[1].hyst); 896 } else { 897 lm85_write_value(client, LM85_REG_AFAN_HYST2, 898 (data->zone[2].hyst << 4)); 899 } 900 mutex_unlock(&data->update_lock); 901 return count; 902 } 903 904 static ssize_t show_temp_auto_temp_min(struct device *dev, 905 struct device_attribute *attr, char *buf) 906 { 907 int nr = to_sensor_dev_attr(attr)->index; 908 struct lm85_data *data = lm85_update_device(dev); 909 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit)); 910 } 911 912 static ssize_t set_temp_auto_temp_min(struct device *dev, 913 struct device_attribute *attr, const char *buf, size_t count) 914 { 915 int nr = to_sensor_dev_attr(attr)->index; 916 struct i2c_client *client = to_i2c_client(dev); 917 struct lm85_data *data = i2c_get_clientdata(client); 918 long val = simple_strtol(buf, NULL, 10); 919 920 mutex_lock(&data->update_lock); 921 data->zone[nr].limit = TEMP_TO_REG(val); 922 lm85_write_value(client, LM85_REG_AFAN_LIMIT(nr), 923 data->zone[nr].limit); 924 925 /* Update temp_auto_max and temp_auto_range */ 926 data->zone[nr].range = RANGE_TO_REG( 927 TEMP_FROM_REG(data->zone[nr].max_desired) - 928 TEMP_FROM_REG(data->zone[nr].limit)); 929 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr), 930 ((data->zone[nr].range & 0x0f) << 4) 931 | (data->pwm_freq[nr] & 0x07)); 932 933 /* Update temp_auto_hyst and temp_auto_off */ 934 data->zone[nr].hyst = HYST_TO_REG(TEMP_FROM_REG( 935 data->zone[nr].limit) - TEMP_FROM_REG( 936 data->zone[nr].off_desired)); 937 if (nr == 0 || nr == 1) { 938 lm85_write_value(client, LM85_REG_AFAN_HYST1, 939 (data->zone[0].hyst << 4) 940 | data->zone[1].hyst); 941 } else { 942 lm85_write_value(client, LM85_REG_AFAN_HYST2, 943 (data->zone[2].hyst << 4)); 944 } 945 mutex_unlock(&data->update_lock); 946 return count; 947 } 948 949 static ssize_t show_temp_auto_temp_max(struct device *dev, 950 struct device_attribute *attr, char *buf) 951 { 952 int nr = to_sensor_dev_attr(attr)->index; 953 struct lm85_data *data = lm85_update_device(dev); 954 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) + 955 RANGE_FROM_REG(data->zone[nr].range)); 956 } 957 958 static ssize_t set_temp_auto_temp_max(struct device *dev, 959 struct device_attribute *attr, const char *buf, size_t count) 960 { 961 int nr = to_sensor_dev_attr(attr)->index; 962 struct i2c_client *client = to_i2c_client(dev); 963 struct lm85_data *data = i2c_get_clientdata(client); 964 int min; 965 long val = simple_strtol(buf, NULL, 10); 966 967 mutex_lock(&data->update_lock); 968 min = TEMP_FROM_REG(data->zone[nr].limit); 969 data->zone[nr].max_desired = TEMP_TO_REG(val); 970 data->zone[nr].range = RANGE_TO_REG( 971 val - min); 972 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr), 973 ((data->zone[nr].range & 0x0f) << 4) 974 | (data->pwm_freq[nr] & 0x07)); 975 mutex_unlock(&data->update_lock); 976 return count; 977 } 978 979 static ssize_t show_temp_auto_temp_crit(struct device *dev, 980 struct device_attribute *attr, char *buf) 981 { 982 int nr = to_sensor_dev_attr(attr)->index; 983 struct lm85_data *data = lm85_update_device(dev); 984 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].critical)); 985 } 986 987 static ssize_t set_temp_auto_temp_crit(struct device *dev, 988 struct device_attribute *attr, const char *buf, size_t count) 989 { 990 int nr = to_sensor_dev_attr(attr)->index; 991 struct i2c_client *client = to_i2c_client(dev); 992 struct lm85_data *data = i2c_get_clientdata(client); 993 long val = simple_strtol(buf, NULL, 10); 994 995 mutex_lock(&data->update_lock); 996 data->zone[nr].critical = TEMP_TO_REG(val); 997 lm85_write_value(client, LM85_REG_AFAN_CRITICAL(nr), 998 data->zone[nr].critical); 999 mutex_unlock(&data->update_lock); 1000 return count; 1001 } 1002 1003 #define temp_auto(offset) \ 1004 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_off, \ 1005 S_IRUGO | S_IWUSR, show_temp_auto_temp_off, \ 1006 set_temp_auto_temp_off, offset - 1); \ 1007 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_min, \ 1008 S_IRUGO | S_IWUSR, show_temp_auto_temp_min, \ 1009 set_temp_auto_temp_min, offset - 1); \ 1010 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_max, \ 1011 S_IRUGO | S_IWUSR, show_temp_auto_temp_max, \ 1012 set_temp_auto_temp_max, offset - 1); \ 1013 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_crit, \ 1014 S_IRUGO | S_IWUSR, show_temp_auto_temp_crit, \ 1015 set_temp_auto_temp_crit, offset - 1); 1016 1017 temp_auto(1); 1018 temp_auto(2); 1019 temp_auto(3); 1020 1021 static struct attribute *lm85_attributes[] = { 1022 &sensor_dev_attr_fan1_input.dev_attr.attr, 1023 &sensor_dev_attr_fan2_input.dev_attr.attr, 1024 &sensor_dev_attr_fan3_input.dev_attr.attr, 1025 &sensor_dev_attr_fan4_input.dev_attr.attr, 1026 &sensor_dev_attr_fan1_min.dev_attr.attr, 1027 &sensor_dev_attr_fan2_min.dev_attr.attr, 1028 &sensor_dev_attr_fan3_min.dev_attr.attr, 1029 &sensor_dev_attr_fan4_min.dev_attr.attr, 1030 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1031 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1032 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1033 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1034 1035 &sensor_dev_attr_pwm1.dev_attr.attr, 1036 &sensor_dev_attr_pwm2.dev_attr.attr, 1037 &sensor_dev_attr_pwm3.dev_attr.attr, 1038 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1039 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1040 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1041 &sensor_dev_attr_pwm1_freq.dev_attr.attr, 1042 &sensor_dev_attr_pwm2_freq.dev_attr.attr, 1043 &sensor_dev_attr_pwm3_freq.dev_attr.attr, 1044 1045 &sensor_dev_attr_in0_input.dev_attr.attr, 1046 &sensor_dev_attr_in1_input.dev_attr.attr, 1047 &sensor_dev_attr_in2_input.dev_attr.attr, 1048 &sensor_dev_attr_in3_input.dev_attr.attr, 1049 &sensor_dev_attr_in0_min.dev_attr.attr, 1050 &sensor_dev_attr_in1_min.dev_attr.attr, 1051 &sensor_dev_attr_in2_min.dev_attr.attr, 1052 &sensor_dev_attr_in3_min.dev_attr.attr, 1053 &sensor_dev_attr_in0_max.dev_attr.attr, 1054 &sensor_dev_attr_in1_max.dev_attr.attr, 1055 &sensor_dev_attr_in2_max.dev_attr.attr, 1056 &sensor_dev_attr_in3_max.dev_attr.attr, 1057 &sensor_dev_attr_in0_alarm.dev_attr.attr, 1058 &sensor_dev_attr_in1_alarm.dev_attr.attr, 1059 &sensor_dev_attr_in2_alarm.dev_attr.attr, 1060 &sensor_dev_attr_in3_alarm.dev_attr.attr, 1061 1062 &sensor_dev_attr_temp1_input.dev_attr.attr, 1063 &sensor_dev_attr_temp2_input.dev_attr.attr, 1064 &sensor_dev_attr_temp3_input.dev_attr.attr, 1065 &sensor_dev_attr_temp1_min.dev_attr.attr, 1066 &sensor_dev_attr_temp2_min.dev_attr.attr, 1067 &sensor_dev_attr_temp3_min.dev_attr.attr, 1068 &sensor_dev_attr_temp1_max.dev_attr.attr, 1069 &sensor_dev_attr_temp2_max.dev_attr.attr, 1070 &sensor_dev_attr_temp3_max.dev_attr.attr, 1071 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1072 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1073 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1074 &sensor_dev_attr_temp1_fault.dev_attr.attr, 1075 &sensor_dev_attr_temp3_fault.dev_attr.attr, 1076 1077 &sensor_dev_attr_pwm1_auto_channels.dev_attr.attr, 1078 &sensor_dev_attr_pwm2_auto_channels.dev_attr.attr, 1079 &sensor_dev_attr_pwm3_auto_channels.dev_attr.attr, 1080 &sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr, 1081 &sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr, 1082 &sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr, 1083 &sensor_dev_attr_pwm1_auto_pwm_minctl.dev_attr.attr, 1084 &sensor_dev_attr_pwm2_auto_pwm_minctl.dev_attr.attr, 1085 &sensor_dev_attr_pwm3_auto_pwm_minctl.dev_attr.attr, 1086 1087 &sensor_dev_attr_temp1_auto_temp_off.dev_attr.attr, 1088 &sensor_dev_attr_temp2_auto_temp_off.dev_attr.attr, 1089 &sensor_dev_attr_temp3_auto_temp_off.dev_attr.attr, 1090 &sensor_dev_attr_temp1_auto_temp_min.dev_attr.attr, 1091 &sensor_dev_attr_temp2_auto_temp_min.dev_attr.attr, 1092 &sensor_dev_attr_temp3_auto_temp_min.dev_attr.attr, 1093 &sensor_dev_attr_temp1_auto_temp_max.dev_attr.attr, 1094 &sensor_dev_attr_temp2_auto_temp_max.dev_attr.attr, 1095 &sensor_dev_attr_temp3_auto_temp_max.dev_attr.attr, 1096 &sensor_dev_attr_temp1_auto_temp_crit.dev_attr.attr, 1097 &sensor_dev_attr_temp2_auto_temp_crit.dev_attr.attr, 1098 &sensor_dev_attr_temp3_auto_temp_crit.dev_attr.attr, 1099 1100 &dev_attr_vrm.attr, 1101 &dev_attr_cpu0_vid.attr, 1102 &dev_attr_alarms.attr, 1103 NULL 1104 }; 1105 1106 static const struct attribute_group lm85_group = { 1107 .attrs = lm85_attributes, 1108 }; 1109 1110 static struct attribute *lm85_attributes_in4[] = { 1111 &sensor_dev_attr_in4_input.dev_attr.attr, 1112 &sensor_dev_attr_in4_min.dev_attr.attr, 1113 &sensor_dev_attr_in4_max.dev_attr.attr, 1114 &sensor_dev_attr_in4_alarm.dev_attr.attr, 1115 NULL 1116 }; 1117 1118 static const struct attribute_group lm85_group_in4 = { 1119 .attrs = lm85_attributes_in4, 1120 }; 1121 1122 static struct attribute *lm85_attributes_in567[] = { 1123 &sensor_dev_attr_in5_input.dev_attr.attr, 1124 &sensor_dev_attr_in6_input.dev_attr.attr, 1125 &sensor_dev_attr_in7_input.dev_attr.attr, 1126 &sensor_dev_attr_in5_min.dev_attr.attr, 1127 &sensor_dev_attr_in6_min.dev_attr.attr, 1128 &sensor_dev_attr_in7_min.dev_attr.attr, 1129 &sensor_dev_attr_in5_max.dev_attr.attr, 1130 &sensor_dev_attr_in6_max.dev_attr.attr, 1131 &sensor_dev_attr_in7_max.dev_attr.attr, 1132 &sensor_dev_attr_in5_alarm.dev_attr.attr, 1133 &sensor_dev_attr_in6_alarm.dev_attr.attr, 1134 &sensor_dev_attr_in7_alarm.dev_attr.attr, 1135 NULL 1136 }; 1137 1138 static const struct attribute_group lm85_group_in567 = { 1139 .attrs = lm85_attributes_in567, 1140 }; 1141 1142 static void lm85_init_client(struct i2c_client *client) 1143 { 1144 int value; 1145 1146 /* Start monitoring if needed */ 1147 value = lm85_read_value(client, LM85_REG_CONFIG); 1148 if (!(value & 0x01)) { 1149 dev_info(&client->dev, "Starting monitoring\n"); 1150 lm85_write_value(client, LM85_REG_CONFIG, value | 0x01); 1151 } 1152 1153 /* Warn about unusual configuration bits */ 1154 if (value & 0x02) 1155 dev_warn(&client->dev, "Device configuration is locked\n"); 1156 if (!(value & 0x04)) 1157 dev_warn(&client->dev, "Device is not ready\n"); 1158 } 1159 1160 static int lm85_is_fake(struct i2c_client *client) 1161 { 1162 /* 1163 * Differenciate between real LM96000 and Winbond WPCD377I. The latter 1164 * emulate the former except that it has no hardware monitoring function 1165 * so the readings are always 0. 1166 */ 1167 int i; 1168 u8 in_temp, fan; 1169 1170 for (i = 0; i < 8; i++) { 1171 in_temp = i2c_smbus_read_byte_data(client, 0x20 + i); 1172 fan = i2c_smbus_read_byte_data(client, 0x28 + i); 1173 if (in_temp != 0x00 || fan != 0xff) 1174 return 0; 1175 } 1176 1177 return 1; 1178 } 1179 1180 /* Return 0 if detection is successful, -ENODEV otherwise */ 1181 static int lm85_detect(struct i2c_client *client, struct i2c_board_info *info) 1182 { 1183 struct i2c_adapter *adapter = client->adapter; 1184 int address = client->addr; 1185 const char *type_name; 1186 int company, verstep; 1187 1188 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { 1189 /* We need to be able to do byte I/O */ 1190 return -ENODEV; 1191 } 1192 1193 /* Determine the chip type */ 1194 company = lm85_read_value(client, LM85_REG_COMPANY); 1195 verstep = lm85_read_value(client, LM85_REG_VERSTEP); 1196 1197 dev_dbg(&adapter->dev, "Detecting device at 0x%02x with " 1198 "COMPANY: 0x%02x and VERSTEP: 0x%02x\n", 1199 address, company, verstep); 1200 1201 /* All supported chips have the version in common */ 1202 if ((verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC && 1203 (verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC2) { 1204 dev_dbg(&adapter->dev, 1205 "Autodetection failed: unsupported version\n"); 1206 return -ENODEV; 1207 } 1208 type_name = "lm85"; 1209 1210 /* Now, refine the detection */ 1211 if (company == LM85_COMPANY_NATIONAL) { 1212 switch (verstep) { 1213 case LM85_VERSTEP_LM85C: 1214 type_name = "lm85c"; 1215 break; 1216 case LM85_VERSTEP_LM85B: 1217 type_name = "lm85b"; 1218 break; 1219 case LM85_VERSTEP_LM96000_1: 1220 case LM85_VERSTEP_LM96000_2: 1221 /* Check for Winbond WPCD377I */ 1222 if (lm85_is_fake(client)) { 1223 dev_dbg(&adapter->dev, 1224 "Found Winbond WPCD377I, ignoring\n"); 1225 return -ENODEV; 1226 } 1227 break; 1228 } 1229 } else if (company == LM85_COMPANY_ANALOG_DEV) { 1230 switch (verstep) { 1231 case LM85_VERSTEP_ADM1027: 1232 type_name = "adm1027"; 1233 break; 1234 case LM85_VERSTEP_ADT7463: 1235 case LM85_VERSTEP_ADT7463C: 1236 type_name = "adt7463"; 1237 break; 1238 case LM85_VERSTEP_ADT7468_1: 1239 case LM85_VERSTEP_ADT7468_2: 1240 type_name = "adt7468"; 1241 break; 1242 } 1243 } else if (company == LM85_COMPANY_SMSC) { 1244 switch (verstep) { 1245 case LM85_VERSTEP_EMC6D100_A0: 1246 case LM85_VERSTEP_EMC6D100_A1: 1247 /* Note: we can't tell a '100 from a '101 */ 1248 type_name = "emc6d100"; 1249 break; 1250 case LM85_VERSTEP_EMC6D102: 1251 type_name = "emc6d102"; 1252 break; 1253 } 1254 } else { 1255 dev_dbg(&adapter->dev, 1256 "Autodetection failed: unknown vendor\n"); 1257 return -ENODEV; 1258 } 1259 1260 strlcpy(info->type, type_name, I2C_NAME_SIZE); 1261 1262 return 0; 1263 } 1264 1265 static int lm85_probe(struct i2c_client *client, 1266 const struct i2c_device_id *id) 1267 { 1268 struct lm85_data *data; 1269 int err; 1270 1271 data = kzalloc(sizeof(struct lm85_data), GFP_KERNEL); 1272 if (!data) 1273 return -ENOMEM; 1274 1275 i2c_set_clientdata(client, data); 1276 data->type = id->driver_data; 1277 mutex_init(&data->update_lock); 1278 1279 /* Fill in the chip specific driver values */ 1280 switch (data->type) { 1281 case adm1027: 1282 case adt7463: 1283 case adt7468: 1284 case emc6d100: 1285 case emc6d102: 1286 data->freq_map = adm1027_freq_map; 1287 break; 1288 default: 1289 data->freq_map = lm85_freq_map; 1290 } 1291 1292 /* Set the VRM version */ 1293 data->vrm = vid_which_vrm(); 1294 1295 /* Initialize the LM85 chip */ 1296 lm85_init_client(client); 1297 1298 /* Register sysfs hooks */ 1299 err = sysfs_create_group(&client->dev.kobj, &lm85_group); 1300 if (err) 1301 goto err_kfree; 1302 1303 /* The ADT7463/68 have an optional VRM 10 mode where pin 21 is used 1304 as a sixth digital VID input rather than an analog input. */ 1305 data->vid = lm85_read_value(client, LM85_REG_VID); 1306 if (!((data->type == adt7463 || data->type == adt7468) && 1307 (data->vid & 0x80))) 1308 if ((err = sysfs_create_group(&client->dev.kobj, 1309 &lm85_group_in4))) 1310 goto err_remove_files; 1311 1312 /* The EMC6D100 has 3 additional voltage inputs */ 1313 if (data->type == emc6d100) 1314 if ((err = sysfs_create_group(&client->dev.kobj, 1315 &lm85_group_in567))) 1316 goto err_remove_files; 1317 1318 data->hwmon_dev = hwmon_device_register(&client->dev); 1319 if (IS_ERR(data->hwmon_dev)) { 1320 err = PTR_ERR(data->hwmon_dev); 1321 goto err_remove_files; 1322 } 1323 1324 return 0; 1325 1326 /* Error out and cleanup code */ 1327 err_remove_files: 1328 sysfs_remove_group(&client->dev.kobj, &lm85_group); 1329 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4); 1330 if (data->type == emc6d100) 1331 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567); 1332 err_kfree: 1333 kfree(data); 1334 return err; 1335 } 1336 1337 static int lm85_remove(struct i2c_client *client) 1338 { 1339 struct lm85_data *data = i2c_get_clientdata(client); 1340 hwmon_device_unregister(data->hwmon_dev); 1341 sysfs_remove_group(&client->dev.kobj, &lm85_group); 1342 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4); 1343 if (data->type == emc6d100) 1344 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567); 1345 kfree(data); 1346 return 0; 1347 } 1348 1349 1350 static int lm85_read_value(struct i2c_client *client, u8 reg) 1351 { 1352 int res; 1353 1354 /* What size location is it? */ 1355 switch (reg) { 1356 case LM85_REG_FAN(0): /* Read WORD data */ 1357 case LM85_REG_FAN(1): 1358 case LM85_REG_FAN(2): 1359 case LM85_REG_FAN(3): 1360 case LM85_REG_FAN_MIN(0): 1361 case LM85_REG_FAN_MIN(1): 1362 case LM85_REG_FAN_MIN(2): 1363 case LM85_REG_FAN_MIN(3): 1364 case LM85_REG_ALARM1: /* Read both bytes at once */ 1365 res = i2c_smbus_read_byte_data(client, reg) & 0xff; 1366 res |= i2c_smbus_read_byte_data(client, reg + 1) << 8; 1367 break; 1368 default: /* Read BYTE data */ 1369 res = i2c_smbus_read_byte_data(client, reg); 1370 break; 1371 } 1372 1373 return res; 1374 } 1375 1376 static void lm85_write_value(struct i2c_client *client, u8 reg, int value) 1377 { 1378 switch (reg) { 1379 case LM85_REG_FAN(0): /* Write WORD data */ 1380 case LM85_REG_FAN(1): 1381 case LM85_REG_FAN(2): 1382 case LM85_REG_FAN(3): 1383 case LM85_REG_FAN_MIN(0): 1384 case LM85_REG_FAN_MIN(1): 1385 case LM85_REG_FAN_MIN(2): 1386 case LM85_REG_FAN_MIN(3): 1387 /* NOTE: ALARM is read only, so not included here */ 1388 i2c_smbus_write_byte_data(client, reg, value & 0xff); 1389 i2c_smbus_write_byte_data(client, reg + 1, value >> 8); 1390 break; 1391 default: /* Write BYTE data */ 1392 i2c_smbus_write_byte_data(client, reg, value); 1393 break; 1394 } 1395 } 1396 1397 static struct lm85_data *lm85_update_device(struct device *dev) 1398 { 1399 struct i2c_client *client = to_i2c_client(dev); 1400 struct lm85_data *data = i2c_get_clientdata(client); 1401 int i; 1402 1403 mutex_lock(&data->update_lock); 1404 1405 if (!data->valid || 1406 time_after(jiffies, data->last_reading + LM85_DATA_INTERVAL)) { 1407 /* Things that change quickly */ 1408 dev_dbg(&client->dev, "Reading sensor values\n"); 1409 1410 /* Have to read extended bits first to "freeze" the 1411 * more significant bits that are read later. 1412 * There are 2 additional resolution bits per channel and we 1413 * have room for 4, so we shift them to the left. 1414 */ 1415 if (data->type == adm1027 || data->type == adt7463 || 1416 data->type == adt7468) { 1417 int ext1 = lm85_read_value(client, 1418 ADM1027_REG_EXTEND_ADC1); 1419 int ext2 = lm85_read_value(client, 1420 ADM1027_REG_EXTEND_ADC2); 1421 int val = (ext1 << 8) + ext2; 1422 1423 for (i = 0; i <= 4; i++) 1424 data->in_ext[i] = 1425 ((val >> (i * 2)) & 0x03) << 2; 1426 1427 for (i = 0; i <= 2; i++) 1428 data->temp_ext[i] = 1429 (val >> ((i + 4) * 2)) & 0x0c; 1430 } 1431 1432 data->vid = lm85_read_value(client, LM85_REG_VID); 1433 1434 for (i = 0; i <= 3; ++i) { 1435 data->in[i] = 1436 lm85_read_value(client, LM85_REG_IN(i)); 1437 data->fan[i] = 1438 lm85_read_value(client, LM85_REG_FAN(i)); 1439 } 1440 1441 if (!((data->type == adt7463 || data->type == adt7468) && 1442 (data->vid & 0x80))) { 1443 data->in[4] = lm85_read_value(client, 1444 LM85_REG_IN(4)); 1445 } 1446 1447 if (data->type == adt7468) 1448 data->cfg5 = lm85_read_value(client, ADT7468_REG_CFG5); 1449 1450 for (i = 0; i <= 2; ++i) { 1451 data->temp[i] = 1452 lm85_read_value(client, LM85_REG_TEMP(i)); 1453 data->pwm[i] = 1454 lm85_read_value(client, LM85_REG_PWM(i)); 1455 1456 if (IS_ADT7468_OFF64(data)) 1457 data->temp[i] -= 64; 1458 } 1459 1460 data->alarms = lm85_read_value(client, LM85_REG_ALARM1); 1461 1462 if (data->type == emc6d100) { 1463 /* Three more voltage sensors */ 1464 for (i = 5; i <= 7; ++i) { 1465 data->in[i] = lm85_read_value(client, 1466 EMC6D100_REG_IN(i)); 1467 } 1468 /* More alarm bits */ 1469 data->alarms |= lm85_read_value(client, 1470 EMC6D100_REG_ALARM3) << 16; 1471 } else if (data->type == emc6d102) { 1472 /* Have to read LSB bits after the MSB ones because 1473 the reading of the MSB bits has frozen the 1474 LSBs (backward from the ADM1027). 1475 */ 1476 int ext1 = lm85_read_value(client, 1477 EMC6D102_REG_EXTEND_ADC1); 1478 int ext2 = lm85_read_value(client, 1479 EMC6D102_REG_EXTEND_ADC2); 1480 int ext3 = lm85_read_value(client, 1481 EMC6D102_REG_EXTEND_ADC3); 1482 int ext4 = lm85_read_value(client, 1483 EMC6D102_REG_EXTEND_ADC4); 1484 data->in_ext[0] = ext3 & 0x0f; 1485 data->in_ext[1] = ext4 & 0x0f; 1486 data->in_ext[2] = ext4 >> 4; 1487 data->in_ext[3] = ext3 >> 4; 1488 data->in_ext[4] = ext2 >> 4; 1489 1490 data->temp_ext[0] = ext1 & 0x0f; 1491 data->temp_ext[1] = ext2 & 0x0f; 1492 data->temp_ext[2] = ext1 >> 4; 1493 } 1494 1495 data->last_reading = jiffies; 1496 } /* last_reading */ 1497 1498 if (!data->valid || 1499 time_after(jiffies, data->last_config + LM85_CONFIG_INTERVAL)) { 1500 /* Things that don't change often */ 1501 dev_dbg(&client->dev, "Reading config values\n"); 1502 1503 for (i = 0; i <= 3; ++i) { 1504 data->in_min[i] = 1505 lm85_read_value(client, LM85_REG_IN_MIN(i)); 1506 data->in_max[i] = 1507 lm85_read_value(client, LM85_REG_IN_MAX(i)); 1508 data->fan_min[i] = 1509 lm85_read_value(client, LM85_REG_FAN_MIN(i)); 1510 } 1511 1512 if (!((data->type == adt7463 || data->type == adt7468) && 1513 (data->vid & 0x80))) { 1514 data->in_min[4] = lm85_read_value(client, 1515 LM85_REG_IN_MIN(4)); 1516 data->in_max[4] = lm85_read_value(client, 1517 LM85_REG_IN_MAX(4)); 1518 } 1519 1520 if (data->type == emc6d100) { 1521 for (i = 5; i <= 7; ++i) { 1522 data->in_min[i] = lm85_read_value(client, 1523 EMC6D100_REG_IN_MIN(i)); 1524 data->in_max[i] = lm85_read_value(client, 1525 EMC6D100_REG_IN_MAX(i)); 1526 } 1527 } 1528 1529 for (i = 0; i <= 2; ++i) { 1530 int val; 1531 1532 data->temp_min[i] = 1533 lm85_read_value(client, LM85_REG_TEMP_MIN(i)); 1534 data->temp_max[i] = 1535 lm85_read_value(client, LM85_REG_TEMP_MAX(i)); 1536 1537 data->autofan[i].config = 1538 lm85_read_value(client, LM85_REG_AFAN_CONFIG(i)); 1539 val = lm85_read_value(client, LM85_REG_AFAN_RANGE(i)); 1540 data->pwm_freq[i] = val & 0x07; 1541 data->zone[i].range = val >> 4; 1542 data->autofan[i].min_pwm = 1543 lm85_read_value(client, LM85_REG_AFAN_MINPWM(i)); 1544 data->zone[i].limit = 1545 lm85_read_value(client, LM85_REG_AFAN_LIMIT(i)); 1546 data->zone[i].critical = 1547 lm85_read_value(client, LM85_REG_AFAN_CRITICAL(i)); 1548 1549 if (IS_ADT7468_OFF64(data)) { 1550 data->temp_min[i] -= 64; 1551 data->temp_max[i] -= 64; 1552 data->zone[i].limit -= 64; 1553 data->zone[i].critical -= 64; 1554 } 1555 } 1556 1557 i = lm85_read_value(client, LM85_REG_AFAN_SPIKE1); 1558 data->autofan[0].min_off = (i & 0x20) != 0; 1559 data->autofan[1].min_off = (i & 0x40) != 0; 1560 data->autofan[2].min_off = (i & 0x80) != 0; 1561 1562 i = lm85_read_value(client, LM85_REG_AFAN_HYST1); 1563 data->zone[0].hyst = i >> 4; 1564 data->zone[1].hyst = i & 0x0f; 1565 1566 i = lm85_read_value(client, LM85_REG_AFAN_HYST2); 1567 data->zone[2].hyst = i >> 4; 1568 1569 data->last_config = jiffies; 1570 } /* last_config */ 1571 1572 data->valid = 1; 1573 1574 mutex_unlock(&data->update_lock); 1575 1576 return data; 1577 } 1578 1579 1580 static int __init sm_lm85_init(void) 1581 { 1582 return i2c_add_driver(&lm85_driver); 1583 } 1584 1585 static void __exit sm_lm85_exit(void) 1586 { 1587 i2c_del_driver(&lm85_driver); 1588 } 1589 1590 MODULE_LICENSE("GPL"); 1591 MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com>, " 1592 "Margit Schubert-While <margitsw@t-online.de>, " 1593 "Justin Thiessen <jthiessen@penguincomputing.com>"); 1594 MODULE_DESCRIPTION("LM85-B, LM85-C driver"); 1595 1596 module_init(sm_lm85_init); 1597 module_exit(sm_lm85_exit); 1598