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, 2008 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 /* Insmod parameters */ 42 I2C_CLIENT_INSMOD_7(lm85b, lm85c, adm1027, adt7463, adt7468, emc6d100, 43 emc6d102); 44 45 /* The LM85 registers */ 46 47 #define LM85_REG_IN(nr) (0x20 + (nr)) 48 #define LM85_REG_IN_MIN(nr) (0x44 + (nr) * 2) 49 #define LM85_REG_IN_MAX(nr) (0x45 + (nr) * 2) 50 51 #define LM85_REG_TEMP(nr) (0x25 + (nr)) 52 #define LM85_REG_TEMP_MIN(nr) (0x4e + (nr) * 2) 53 #define LM85_REG_TEMP_MAX(nr) (0x4f + (nr) * 2) 54 55 /* Fan speeds are LSB, MSB (2 bytes) */ 56 #define LM85_REG_FAN(nr) (0x28 + (nr) * 2) 57 #define LM85_REG_FAN_MIN(nr) (0x54 + (nr) * 2) 58 59 #define LM85_REG_PWM(nr) (0x30 + (nr)) 60 61 #define LM85_REG_COMPANY 0x3e 62 #define LM85_REG_VERSTEP 0x3f 63 64 #define ADT7468_REG_CFG5 0x7c 65 #define ADT7468_OFF64 0x01 66 #define IS_ADT7468_OFF64(data) \ 67 ((data)->type == adt7468 && !((data)->cfg5 & ADT7468_OFF64)) 68 69 /* These are the recognized values for the above regs */ 70 #define LM85_COMPANY_NATIONAL 0x01 71 #define LM85_COMPANY_ANALOG_DEV 0x41 72 #define LM85_COMPANY_SMSC 0x5c 73 #define LM85_VERSTEP_VMASK 0xf0 74 #define LM85_VERSTEP_GENERIC 0x60 75 #define LM85_VERSTEP_GENERIC2 0x70 76 #define LM85_VERSTEP_LM85C 0x60 77 #define LM85_VERSTEP_LM85B 0x62 78 #define LM85_VERSTEP_LM96000_1 0x68 79 #define LM85_VERSTEP_LM96000_2 0x69 80 #define LM85_VERSTEP_ADM1027 0x60 81 #define LM85_VERSTEP_ADT7463 0x62 82 #define LM85_VERSTEP_ADT7463C 0x6A 83 #define LM85_VERSTEP_ADT7468_1 0x71 84 #define LM85_VERSTEP_ADT7468_2 0x72 85 #define LM85_VERSTEP_EMC6D100_A0 0x60 86 #define LM85_VERSTEP_EMC6D100_A1 0x61 87 #define LM85_VERSTEP_EMC6D102 0x65 88 89 #define LM85_REG_CONFIG 0x40 90 91 #define LM85_REG_ALARM1 0x41 92 #define LM85_REG_ALARM2 0x42 93 94 #define LM85_REG_VID 0x43 95 96 /* Automated FAN control */ 97 #define LM85_REG_AFAN_CONFIG(nr) (0x5c + (nr)) 98 #define LM85_REG_AFAN_RANGE(nr) (0x5f + (nr)) 99 #define LM85_REG_AFAN_SPIKE1 0x62 100 #define LM85_REG_AFAN_MINPWM(nr) (0x64 + (nr)) 101 #define LM85_REG_AFAN_LIMIT(nr) (0x67 + (nr)) 102 #define LM85_REG_AFAN_CRITICAL(nr) (0x6a + (nr)) 103 #define LM85_REG_AFAN_HYST1 0x6d 104 #define LM85_REG_AFAN_HYST2 0x6e 105 106 #define ADM1027_REG_EXTEND_ADC1 0x76 107 #define ADM1027_REG_EXTEND_ADC2 0x77 108 109 #define EMC6D100_REG_ALARM3 0x7d 110 /* IN5, IN6 and IN7 */ 111 #define EMC6D100_REG_IN(nr) (0x70 + ((nr) - 5)) 112 #define EMC6D100_REG_IN_MIN(nr) (0x73 + ((nr) - 5) * 2) 113 #define EMC6D100_REG_IN_MAX(nr) (0x74 + ((nr) - 5) * 2) 114 #define EMC6D102_REG_EXTEND_ADC1 0x85 115 #define EMC6D102_REG_EXTEND_ADC2 0x86 116 #define EMC6D102_REG_EXTEND_ADC3 0x87 117 #define EMC6D102_REG_EXTEND_ADC4 0x88 118 119 120 /* Conversions. Rounding and limit checking is only done on the TO_REG 121 variants. Note that you should be a bit careful with which arguments 122 these macros are called: arguments may be evaluated more than once. 123 */ 124 125 /* IN are scaled acording to built-in resistors */ 126 static const int lm85_scaling[] = { /* .001 Volts */ 127 2500, 2250, 3300, 5000, 12000, 128 3300, 1500, 1800 /*EMC6D100*/ 129 }; 130 #define SCALE(val, from, to) (((val) * (to) + ((from) / 2)) / (from)) 131 132 #define INS_TO_REG(n, val) \ 133 SENSORS_LIMIT(SCALE(val, lm85_scaling[n], 192), 0, 255) 134 135 #define INSEXT_FROM_REG(n, val, ext) \ 136 SCALE(((val) << 4) + (ext), 192 << 4, lm85_scaling[n]) 137 138 #define INS_FROM_REG(n, val) SCALE((val), 192, lm85_scaling[n]) 139 140 /* FAN speed is measured using 90kHz clock */ 141 static inline u16 FAN_TO_REG(unsigned long val) 142 { 143 if (!val) 144 return 0xffff; 145 return SENSORS_LIMIT(5400000 / val, 1, 0xfffe); 146 } 147 #define FAN_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \ 148 5400000 / (val)) 149 150 /* Temperature is reported in .001 degC increments */ 151 #define TEMP_TO_REG(val) \ 152 SENSORS_LIMIT(SCALE(val, 1000, 1), -127, 127) 153 #define TEMPEXT_FROM_REG(val, ext) \ 154 SCALE(((val) << 4) + (ext), 16, 1000) 155 #define TEMP_FROM_REG(val) ((val) * 1000) 156 157 #define PWM_TO_REG(val) SENSORS_LIMIT(val, 0, 255) 158 #define PWM_FROM_REG(val) (val) 159 160 161 /* ZONEs have the following parameters: 162 * Limit (low) temp, 1. degC 163 * Hysteresis (below limit), 1. degC (0-15) 164 * Range of speed control, .1 degC (2-80) 165 * Critical (high) temp, 1. degC 166 * 167 * FAN PWMs have the following parameters: 168 * Reference Zone, 1, 2, 3, etc. 169 * Spinup time, .05 sec 170 * PWM value at limit/low temp, 1 count 171 * PWM Frequency, 1. Hz 172 * PWM is Min or OFF below limit, flag 173 * Invert PWM output, flag 174 * 175 * Some chips filter the temp, others the fan. 176 * Filter constant (or disabled) .1 seconds 177 */ 178 179 /* These are the zone temperature range encodings in .001 degree C */ 180 static const int lm85_range_map[] = { 181 2000, 2500, 3300, 4000, 5000, 6600, 8000, 10000, 182 13300, 16000, 20000, 26600, 32000, 40000, 53300, 80000 183 }; 184 185 static int RANGE_TO_REG(int range) 186 { 187 int i; 188 189 /* Find the closest match */ 190 for (i = 0; i < 15; ++i) { 191 if (range <= (lm85_range_map[i] + lm85_range_map[i + 1]) / 2) 192 break; 193 } 194 195 return i; 196 } 197 #define RANGE_FROM_REG(val) lm85_range_map[(val) & 0x0f] 198 199 /* These are the PWM frequency encodings */ 200 static const int lm85_freq_map[8] = { /* 1 Hz */ 201 10, 15, 23, 30, 38, 47, 61, 94 202 }; 203 static const int adm1027_freq_map[8] = { /* 1 Hz */ 204 11, 15, 22, 29, 35, 44, 59, 88 205 }; 206 207 static int FREQ_TO_REG(const int *map, int freq) 208 { 209 int i; 210 211 /* Find the closest match */ 212 for (i = 0; i < 7; ++i) 213 if (freq <= (map[i] + map[i + 1]) / 2) 214 break; 215 return i; 216 } 217 218 static int FREQ_FROM_REG(const int *map, u8 reg) 219 { 220 return map[reg & 0x07]; 221 } 222 223 /* Since we can't use strings, I'm abusing these numbers 224 * to stand in for the following meanings: 225 * 1 -- PWM responds to Zone 1 226 * 2 -- PWM responds to Zone 2 227 * 3 -- PWM responds to Zone 3 228 * 23 -- PWM responds to the higher temp of Zone 2 or 3 229 * 123 -- PWM responds to highest of Zone 1, 2, or 3 230 * 0 -- PWM is always at 0% (ie, off) 231 * -1 -- PWM is always at 100% 232 * -2 -- PWM responds to manual control 233 */ 234 235 static const int lm85_zone_map[] = { 1, 2, 3, -1, 0, 23, 123, -2 }; 236 #define ZONE_FROM_REG(val) lm85_zone_map[(val) >> 5] 237 238 static int ZONE_TO_REG(int zone) 239 { 240 int i; 241 242 for (i = 0; i <= 7; ++i) 243 if (zone == lm85_zone_map[i]) 244 break; 245 if (i > 7) /* Not found. */ 246 i = 3; /* Always 100% */ 247 return i << 5; 248 } 249 250 #define HYST_TO_REG(val) SENSORS_LIMIT(((val) + 500) / 1000, 0, 15) 251 #define HYST_FROM_REG(val) ((val) * 1000) 252 253 /* Chip sampling rates 254 * 255 * Some sensors are not updated more frequently than once per second 256 * so it doesn't make sense to read them more often than that. 257 * We cache the results and return the saved data if the driver 258 * is called again before a second has elapsed. 259 * 260 * Also, there is significant configuration data for this chip 261 * given the automatic PWM fan control that is possible. There 262 * are about 47 bytes of config data to only 22 bytes of actual 263 * readings. So, we keep the config data up to date in the cache 264 * when it is written and only sample it once every 1 *minute* 265 */ 266 #define LM85_DATA_INTERVAL (HZ + HZ / 2) 267 #define LM85_CONFIG_INTERVAL (1 * 60 * HZ) 268 269 /* LM85 can automatically adjust fan speeds based on temperature 270 * This structure encapsulates an entire Zone config. There are 271 * three zones (one for each temperature input) on the lm85 272 */ 273 struct lm85_zone { 274 s8 limit; /* Low temp limit */ 275 u8 hyst; /* Low limit hysteresis. (0-15) */ 276 u8 range; /* Temp range, encoded */ 277 s8 critical; /* "All fans ON" temp limit */ 278 u8 off_desired; /* Actual "off" temperature specified. Preserved 279 * to prevent "drift" as other autofan control 280 * values change. 281 */ 282 u8 max_desired; /* Actual "max" temperature specified. Preserved 283 * to prevent "drift" as other autofan control 284 * values change. 285 */ 286 }; 287 288 struct lm85_autofan { 289 u8 config; /* Register value */ 290 u8 min_pwm; /* Minimum PWM value, encoded */ 291 u8 min_off; /* Min PWM or OFF below "limit", flag */ 292 }; 293 294 /* For each registered chip, we need to keep some data in memory. 295 The structure is dynamically allocated. */ 296 struct lm85_data { 297 struct device *hwmon_dev; 298 const int *freq_map; 299 enum chips type; 300 301 struct mutex update_lock; 302 int valid; /* !=0 if following fields are valid */ 303 unsigned long last_reading; /* In jiffies */ 304 unsigned long last_config; /* In jiffies */ 305 306 u8 in[8]; /* Register value */ 307 u8 in_max[8]; /* Register value */ 308 u8 in_min[8]; /* Register value */ 309 s8 temp[3]; /* Register value */ 310 s8 temp_min[3]; /* Register value */ 311 s8 temp_max[3]; /* Register value */ 312 u16 fan[4]; /* Register value */ 313 u16 fan_min[4]; /* Register value */ 314 u8 pwm[3]; /* Register value */ 315 u8 pwm_freq[3]; /* Register encoding */ 316 u8 temp_ext[3]; /* Decoded values */ 317 u8 in_ext[8]; /* Decoded values */ 318 u8 vid; /* Register value */ 319 u8 vrm; /* VRM version */ 320 u32 alarms; /* Register encoding, combined */ 321 u8 cfg5; /* Config Register 5 on ADT7468 */ 322 struct lm85_autofan autofan[3]; 323 struct lm85_zone zone[3]; 324 }; 325 326 static int lm85_detect(struct i2c_client *client, int kind, 327 struct i2c_board_info *info); 328 static int lm85_probe(struct i2c_client *client, 329 const struct i2c_device_id *id); 330 static int lm85_remove(struct i2c_client *client); 331 332 static int lm85_read_value(struct i2c_client *client, u8 reg); 333 static void lm85_write_value(struct i2c_client *client, u8 reg, int value); 334 static struct lm85_data *lm85_update_device(struct device *dev); 335 336 337 static const struct i2c_device_id lm85_id[] = { 338 { "adm1027", adm1027 }, 339 { "adt7463", adt7463 }, 340 { "adt7468", adt7468 }, 341 { "lm85", any_chip }, 342 { "lm85b", lm85b }, 343 { "lm85c", lm85c }, 344 { "emc6d100", emc6d100 }, 345 { "emc6d101", emc6d100 }, 346 { "emc6d102", emc6d102 }, 347 { } 348 }; 349 MODULE_DEVICE_TABLE(i2c, lm85_id); 350 351 static struct i2c_driver lm85_driver = { 352 .class = I2C_CLASS_HWMON, 353 .driver = { 354 .name = "lm85", 355 }, 356 .probe = lm85_probe, 357 .remove = lm85_remove, 358 .id_table = lm85_id, 359 .detect = lm85_detect, 360 .address_data = &addr_data, 361 }; 362 363 364 /* 4 Fans */ 365 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 366 char *buf) 367 { 368 int nr = to_sensor_dev_attr(attr)->index; 369 struct lm85_data *data = lm85_update_device(dev); 370 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr])); 371 } 372 373 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 374 char *buf) 375 { 376 int nr = to_sensor_dev_attr(attr)->index; 377 struct lm85_data *data = lm85_update_device(dev); 378 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr])); 379 } 380 381 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 382 const char *buf, size_t count) 383 { 384 int nr = to_sensor_dev_attr(attr)->index; 385 struct i2c_client *client = to_i2c_client(dev); 386 struct lm85_data *data = i2c_get_clientdata(client); 387 unsigned long val = simple_strtoul(buf, NULL, 10); 388 389 mutex_lock(&data->update_lock); 390 data->fan_min[nr] = FAN_TO_REG(val); 391 lm85_write_value(client, LM85_REG_FAN_MIN(nr), data->fan_min[nr]); 392 mutex_unlock(&data->update_lock); 393 return count; 394 } 395 396 #define show_fan_offset(offset) \ 397 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ 398 show_fan, NULL, offset - 1); \ 399 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ 400 show_fan_min, set_fan_min, offset - 1) 401 402 show_fan_offset(1); 403 show_fan_offset(2); 404 show_fan_offset(3); 405 show_fan_offset(4); 406 407 /* vid, vrm, alarms */ 408 409 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr, 410 char *buf) 411 { 412 struct lm85_data *data = lm85_update_device(dev); 413 int vid; 414 415 if ((data->type == adt7463 || data->type == adt7468) && 416 (data->vid & 0x80)) { 417 /* 6-pin VID (VRM 10) */ 418 vid = vid_from_reg(data->vid & 0x3f, data->vrm); 419 } else { 420 /* 5-pin VID (VRM 9) */ 421 vid = vid_from_reg(data->vid & 0x1f, data->vrm); 422 } 423 424 return sprintf(buf, "%d\n", vid); 425 } 426 427 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 428 429 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr, 430 char *buf) 431 { 432 struct lm85_data *data = dev_get_drvdata(dev); 433 return sprintf(buf, "%ld\n", (long) data->vrm); 434 } 435 436 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr, 437 const char *buf, size_t count) 438 { 439 struct lm85_data *data = dev_get_drvdata(dev); 440 data->vrm = simple_strtoul(buf, NULL, 10); 441 return count; 442 } 443 444 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 445 446 static ssize_t show_alarms_reg(struct device *dev, struct device_attribute 447 *attr, char *buf) 448 { 449 struct lm85_data *data = lm85_update_device(dev); 450 return sprintf(buf, "%u\n", data->alarms); 451 } 452 453 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL); 454 455 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 456 char *buf) 457 { 458 int nr = to_sensor_dev_attr(attr)->index; 459 struct lm85_data *data = lm85_update_device(dev); 460 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); 461 } 462 463 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 464 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 465 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 466 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 467 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 468 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 18); 469 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 16); 470 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 17); 471 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 472 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14); 473 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); 474 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 6); 475 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15); 476 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10); 477 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11); 478 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 12); 479 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 13); 480 481 /* pwm */ 482 483 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 484 char *buf) 485 { 486 int nr = to_sensor_dev_attr(attr)->index; 487 struct lm85_data *data = lm85_update_device(dev); 488 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr])); 489 } 490 491 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 492 const char *buf, size_t count) 493 { 494 int nr = to_sensor_dev_attr(attr)->index; 495 struct i2c_client *client = to_i2c_client(dev); 496 struct lm85_data *data = i2c_get_clientdata(client); 497 long val = simple_strtol(buf, NULL, 10); 498 499 mutex_lock(&data->update_lock); 500 data->pwm[nr] = PWM_TO_REG(val); 501 lm85_write_value(client, LM85_REG_PWM(nr), data->pwm[nr]); 502 mutex_unlock(&data->update_lock); 503 return count; 504 } 505 506 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute 507 *attr, char *buf) 508 { 509 int nr = to_sensor_dev_attr(attr)->index; 510 struct lm85_data *data = lm85_update_device(dev); 511 int pwm_zone, enable; 512 513 pwm_zone = ZONE_FROM_REG(data->autofan[nr].config); 514 switch (pwm_zone) { 515 case -1: /* PWM is always at 100% */ 516 enable = 0; 517 break; 518 case 0: /* PWM is always at 0% */ 519 case -2: /* PWM responds to manual control */ 520 enable = 1; 521 break; 522 default: /* PWM in automatic mode */ 523 enable = 2; 524 } 525 return sprintf(buf, "%d\n", enable); 526 } 527 528 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute 529 *attr, const char *buf, size_t count) 530 { 531 int nr = to_sensor_dev_attr(attr)->index; 532 struct i2c_client *client = to_i2c_client(dev); 533 struct lm85_data *data = i2c_get_clientdata(client); 534 long val = simple_strtol(buf, NULL, 10); 535 u8 config; 536 537 switch (val) { 538 case 0: 539 config = 3; 540 break; 541 case 1: 542 config = 7; 543 break; 544 case 2: 545 /* Here we have to choose arbitrarily one of the 5 possible 546 configurations; I go for the safest */ 547 config = 6; 548 break; 549 default: 550 return -EINVAL; 551 } 552 553 mutex_lock(&data->update_lock); 554 data->autofan[nr].config = lm85_read_value(client, 555 LM85_REG_AFAN_CONFIG(nr)); 556 data->autofan[nr].config = (data->autofan[nr].config & ~0xe0) 557 | (config << 5); 558 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr), 559 data->autofan[nr].config); 560 mutex_unlock(&data->update_lock); 561 return count; 562 } 563 564 static ssize_t show_pwm_freq(struct device *dev, 565 struct device_attribute *attr, char *buf) 566 { 567 int nr = to_sensor_dev_attr(attr)->index; 568 struct lm85_data *data = lm85_update_device(dev); 569 return sprintf(buf, "%d\n", FREQ_FROM_REG(data->freq_map, 570 data->pwm_freq[nr])); 571 } 572 573 static ssize_t set_pwm_freq(struct device *dev, 574 struct device_attribute *attr, const char *buf, size_t count) 575 { 576 int nr = to_sensor_dev_attr(attr)->index; 577 struct i2c_client *client = to_i2c_client(dev); 578 struct lm85_data *data = i2c_get_clientdata(client); 579 long val = simple_strtol(buf, NULL, 10); 580 581 mutex_lock(&data->update_lock); 582 data->pwm_freq[nr] = FREQ_TO_REG(data->freq_map, val); 583 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr), 584 (data->zone[nr].range << 4) 585 | data->pwm_freq[nr]); 586 mutex_unlock(&data->update_lock); 587 return count; 588 } 589 590 #define show_pwm_reg(offset) \ 591 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ 592 show_pwm, set_pwm, offset - 1); \ 593 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ 594 show_pwm_enable, set_pwm_enable, offset - 1); \ 595 static SENSOR_DEVICE_ATTR(pwm##offset##_freq, S_IRUGO | S_IWUSR, \ 596 show_pwm_freq, set_pwm_freq, offset - 1) 597 598 show_pwm_reg(1); 599 show_pwm_reg(2); 600 show_pwm_reg(3); 601 602 /* Voltages */ 603 604 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 605 char *buf) 606 { 607 int nr = to_sensor_dev_attr(attr)->index; 608 struct lm85_data *data = lm85_update_device(dev); 609 return sprintf(buf, "%d\n", INSEXT_FROM_REG(nr, data->in[nr], 610 data->in_ext[nr])); 611 } 612 613 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 614 char *buf) 615 { 616 int nr = to_sensor_dev_attr(attr)->index; 617 struct lm85_data *data = lm85_update_device(dev); 618 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_min[nr])); 619 } 620 621 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 622 const char *buf, size_t count) 623 { 624 int nr = to_sensor_dev_attr(attr)->index; 625 struct i2c_client *client = to_i2c_client(dev); 626 struct lm85_data *data = i2c_get_clientdata(client); 627 long val = simple_strtol(buf, NULL, 10); 628 629 mutex_lock(&data->update_lock); 630 data->in_min[nr] = INS_TO_REG(nr, val); 631 lm85_write_value(client, LM85_REG_IN_MIN(nr), data->in_min[nr]); 632 mutex_unlock(&data->update_lock); 633 return count; 634 } 635 636 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 637 char *buf) 638 { 639 int nr = to_sensor_dev_attr(attr)->index; 640 struct lm85_data *data = lm85_update_device(dev); 641 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_max[nr])); 642 } 643 644 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 645 const char *buf, size_t count) 646 { 647 int nr = to_sensor_dev_attr(attr)->index; 648 struct i2c_client *client = to_i2c_client(dev); 649 struct lm85_data *data = i2c_get_clientdata(client); 650 long val = simple_strtol(buf, NULL, 10); 651 652 mutex_lock(&data->update_lock); 653 data->in_max[nr] = INS_TO_REG(nr, val); 654 lm85_write_value(client, LM85_REG_IN_MAX(nr), data->in_max[nr]); 655 mutex_unlock(&data->update_lock); 656 return count; 657 } 658 659 #define show_in_reg(offset) \ 660 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 661 show_in, NULL, offset); \ 662 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 663 show_in_min, set_in_min, offset); \ 664 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 665 show_in_max, set_in_max, offset) 666 667 show_in_reg(0); 668 show_in_reg(1); 669 show_in_reg(2); 670 show_in_reg(3); 671 show_in_reg(4); 672 show_in_reg(5); 673 show_in_reg(6); 674 show_in_reg(7); 675 676 /* Temps */ 677 678 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 679 char *buf) 680 { 681 int nr = to_sensor_dev_attr(attr)->index; 682 struct lm85_data *data = lm85_update_device(dev); 683 return sprintf(buf, "%d\n", TEMPEXT_FROM_REG(data->temp[nr], 684 data->temp_ext[nr])); 685 } 686 687 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 688 char *buf) 689 { 690 int nr = to_sensor_dev_attr(attr)->index; 691 struct lm85_data *data = lm85_update_device(dev); 692 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr])); 693 } 694 695 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 696 const char *buf, size_t count) 697 { 698 int nr = to_sensor_dev_attr(attr)->index; 699 struct i2c_client *client = to_i2c_client(dev); 700 struct lm85_data *data = i2c_get_clientdata(client); 701 long val = simple_strtol(buf, NULL, 10); 702 703 if (IS_ADT7468_OFF64(data)) 704 val += 64; 705 706 mutex_lock(&data->update_lock); 707 data->temp_min[nr] = TEMP_TO_REG(val); 708 lm85_write_value(client, LM85_REG_TEMP_MIN(nr), data->temp_min[nr]); 709 mutex_unlock(&data->update_lock); 710 return count; 711 } 712 713 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 714 char *buf) 715 { 716 int nr = to_sensor_dev_attr(attr)->index; 717 struct lm85_data *data = lm85_update_device(dev); 718 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr])); 719 } 720 721 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 722 const char *buf, size_t count) 723 { 724 int nr = to_sensor_dev_attr(attr)->index; 725 struct i2c_client *client = to_i2c_client(dev); 726 struct lm85_data *data = i2c_get_clientdata(client); 727 long val = simple_strtol(buf, NULL, 10); 728 729 if (IS_ADT7468_OFF64(data)) 730 val += 64; 731 732 mutex_lock(&data->update_lock); 733 data->temp_max[nr] = TEMP_TO_REG(val); 734 lm85_write_value(client, LM85_REG_TEMP_MAX(nr), data->temp_max[nr]); 735 mutex_unlock(&data->update_lock); 736 return count; 737 } 738 739 #define show_temp_reg(offset) \ 740 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 741 show_temp, NULL, offset - 1); \ 742 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ 743 show_temp_min, set_temp_min, offset - 1); \ 744 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 745 show_temp_max, set_temp_max, offset - 1); 746 747 show_temp_reg(1); 748 show_temp_reg(2); 749 show_temp_reg(3); 750 751 752 /* Automatic PWM control */ 753 754 static ssize_t show_pwm_auto_channels(struct device *dev, 755 struct device_attribute *attr, char *buf) 756 { 757 int nr = to_sensor_dev_attr(attr)->index; 758 struct lm85_data *data = lm85_update_device(dev); 759 return sprintf(buf, "%d\n", ZONE_FROM_REG(data->autofan[nr].config)); 760 } 761 762 static ssize_t set_pwm_auto_channels(struct device *dev, 763 struct device_attribute *attr, const char *buf, size_t count) 764 { 765 int nr = to_sensor_dev_attr(attr)->index; 766 struct i2c_client *client = to_i2c_client(dev); 767 struct lm85_data *data = i2c_get_clientdata(client); 768 long val = simple_strtol(buf, NULL, 10); 769 770 mutex_lock(&data->update_lock); 771 data->autofan[nr].config = (data->autofan[nr].config & (~0xe0)) 772 | ZONE_TO_REG(val); 773 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr), 774 data->autofan[nr].config); 775 mutex_unlock(&data->update_lock); 776 return count; 777 } 778 779 static ssize_t show_pwm_auto_pwm_min(struct device *dev, 780 struct device_attribute *attr, char *buf) 781 { 782 int nr = to_sensor_dev_attr(attr)->index; 783 struct lm85_data *data = lm85_update_device(dev); 784 return sprintf(buf, "%d\n", PWM_FROM_REG(data->autofan[nr].min_pwm)); 785 } 786 787 static ssize_t set_pwm_auto_pwm_min(struct device *dev, 788 struct device_attribute *attr, const char *buf, size_t count) 789 { 790 int nr = to_sensor_dev_attr(attr)->index; 791 struct i2c_client *client = to_i2c_client(dev); 792 struct lm85_data *data = i2c_get_clientdata(client); 793 long val = simple_strtol(buf, NULL, 10); 794 795 mutex_lock(&data->update_lock); 796 data->autofan[nr].min_pwm = PWM_TO_REG(val); 797 lm85_write_value(client, LM85_REG_AFAN_MINPWM(nr), 798 data->autofan[nr].min_pwm); 799 mutex_unlock(&data->update_lock); 800 return count; 801 } 802 803 static ssize_t show_pwm_auto_pwm_minctl(struct device *dev, 804 struct device_attribute *attr, char *buf) 805 { 806 int nr = to_sensor_dev_attr(attr)->index; 807 struct lm85_data *data = lm85_update_device(dev); 808 return sprintf(buf, "%d\n", data->autofan[nr].min_off); 809 } 810 811 static ssize_t set_pwm_auto_pwm_minctl(struct device *dev, 812 struct device_attribute *attr, const char *buf, size_t count) 813 { 814 int nr = to_sensor_dev_attr(attr)->index; 815 struct i2c_client *client = to_i2c_client(dev); 816 struct lm85_data *data = i2c_get_clientdata(client); 817 long val = simple_strtol(buf, NULL, 10); 818 u8 tmp; 819 820 mutex_lock(&data->update_lock); 821 data->autofan[nr].min_off = val; 822 tmp = lm85_read_value(client, LM85_REG_AFAN_SPIKE1); 823 tmp &= ~(0x20 << nr); 824 if (data->autofan[nr].min_off) 825 tmp |= 0x20 << nr; 826 lm85_write_value(client, LM85_REG_AFAN_SPIKE1, tmp); 827 mutex_unlock(&data->update_lock); 828 return count; 829 } 830 831 #define pwm_auto(offset) \ 832 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels, \ 833 S_IRUGO | S_IWUSR, show_pwm_auto_channels, \ 834 set_pwm_auto_channels, offset - 1); \ 835 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_min, \ 836 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_min, \ 837 set_pwm_auto_pwm_min, offset - 1); \ 838 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_minctl, \ 839 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_minctl, \ 840 set_pwm_auto_pwm_minctl, offset - 1) 841 842 pwm_auto(1); 843 pwm_auto(2); 844 pwm_auto(3); 845 846 /* Temperature settings for automatic PWM control */ 847 848 static ssize_t show_temp_auto_temp_off(struct device *dev, 849 struct device_attribute *attr, char *buf) 850 { 851 int nr = to_sensor_dev_attr(attr)->index; 852 struct lm85_data *data = lm85_update_device(dev); 853 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) - 854 HYST_FROM_REG(data->zone[nr].hyst)); 855 } 856 857 static ssize_t set_temp_auto_temp_off(struct device *dev, 858 struct device_attribute *attr, const char *buf, size_t count) 859 { 860 int nr = to_sensor_dev_attr(attr)->index; 861 struct i2c_client *client = to_i2c_client(dev); 862 struct lm85_data *data = i2c_get_clientdata(client); 863 int min; 864 long val = simple_strtol(buf, NULL, 10); 865 866 mutex_lock(&data->update_lock); 867 min = TEMP_FROM_REG(data->zone[nr].limit); 868 data->zone[nr].off_desired = TEMP_TO_REG(val); 869 data->zone[nr].hyst = HYST_TO_REG(min - val); 870 if (nr == 0 || nr == 1) { 871 lm85_write_value(client, LM85_REG_AFAN_HYST1, 872 (data->zone[0].hyst << 4) 873 | data->zone[1].hyst); 874 } else { 875 lm85_write_value(client, LM85_REG_AFAN_HYST2, 876 (data->zone[2].hyst << 4)); 877 } 878 mutex_unlock(&data->update_lock); 879 return count; 880 } 881 882 static ssize_t show_temp_auto_temp_min(struct device *dev, 883 struct device_attribute *attr, char *buf) 884 { 885 int nr = to_sensor_dev_attr(attr)->index; 886 struct lm85_data *data = lm85_update_device(dev); 887 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit)); 888 } 889 890 static ssize_t set_temp_auto_temp_min(struct device *dev, 891 struct device_attribute *attr, const char *buf, size_t count) 892 { 893 int nr = to_sensor_dev_attr(attr)->index; 894 struct i2c_client *client = to_i2c_client(dev); 895 struct lm85_data *data = i2c_get_clientdata(client); 896 long val = simple_strtol(buf, NULL, 10); 897 898 mutex_lock(&data->update_lock); 899 data->zone[nr].limit = TEMP_TO_REG(val); 900 lm85_write_value(client, LM85_REG_AFAN_LIMIT(nr), 901 data->zone[nr].limit); 902 903 /* Update temp_auto_max and temp_auto_range */ 904 data->zone[nr].range = RANGE_TO_REG( 905 TEMP_FROM_REG(data->zone[nr].max_desired) - 906 TEMP_FROM_REG(data->zone[nr].limit)); 907 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr), 908 ((data->zone[nr].range & 0x0f) << 4) 909 | (data->pwm_freq[nr] & 0x07)); 910 911 /* Update temp_auto_hyst and temp_auto_off */ 912 data->zone[nr].hyst = HYST_TO_REG(TEMP_FROM_REG( 913 data->zone[nr].limit) - TEMP_FROM_REG( 914 data->zone[nr].off_desired)); 915 if (nr == 0 || nr == 1) { 916 lm85_write_value(client, LM85_REG_AFAN_HYST1, 917 (data->zone[0].hyst << 4) 918 | data->zone[1].hyst); 919 } else { 920 lm85_write_value(client, LM85_REG_AFAN_HYST2, 921 (data->zone[2].hyst << 4)); 922 } 923 mutex_unlock(&data->update_lock); 924 return count; 925 } 926 927 static ssize_t show_temp_auto_temp_max(struct device *dev, 928 struct device_attribute *attr, char *buf) 929 { 930 int nr = to_sensor_dev_attr(attr)->index; 931 struct lm85_data *data = lm85_update_device(dev); 932 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) + 933 RANGE_FROM_REG(data->zone[nr].range)); 934 } 935 936 static ssize_t set_temp_auto_temp_max(struct device *dev, 937 struct device_attribute *attr, const char *buf, size_t count) 938 { 939 int nr = to_sensor_dev_attr(attr)->index; 940 struct i2c_client *client = to_i2c_client(dev); 941 struct lm85_data *data = i2c_get_clientdata(client); 942 int min; 943 long val = simple_strtol(buf, NULL, 10); 944 945 mutex_lock(&data->update_lock); 946 min = TEMP_FROM_REG(data->zone[nr].limit); 947 data->zone[nr].max_desired = TEMP_TO_REG(val); 948 data->zone[nr].range = RANGE_TO_REG( 949 val - min); 950 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr), 951 ((data->zone[nr].range & 0x0f) << 4) 952 | (data->pwm_freq[nr] & 0x07)); 953 mutex_unlock(&data->update_lock); 954 return count; 955 } 956 957 static ssize_t show_temp_auto_temp_crit(struct device *dev, 958 struct device_attribute *attr, char *buf) 959 { 960 int nr = to_sensor_dev_attr(attr)->index; 961 struct lm85_data *data = lm85_update_device(dev); 962 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].critical)); 963 } 964 965 static ssize_t set_temp_auto_temp_crit(struct device *dev, 966 struct device_attribute *attr, const char *buf, size_t count) 967 { 968 int nr = to_sensor_dev_attr(attr)->index; 969 struct i2c_client *client = to_i2c_client(dev); 970 struct lm85_data *data = i2c_get_clientdata(client); 971 long val = simple_strtol(buf, NULL, 10); 972 973 mutex_lock(&data->update_lock); 974 data->zone[nr].critical = TEMP_TO_REG(val); 975 lm85_write_value(client, LM85_REG_AFAN_CRITICAL(nr), 976 data->zone[nr].critical); 977 mutex_unlock(&data->update_lock); 978 return count; 979 } 980 981 #define temp_auto(offset) \ 982 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_off, \ 983 S_IRUGO | S_IWUSR, show_temp_auto_temp_off, \ 984 set_temp_auto_temp_off, offset - 1); \ 985 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_min, \ 986 S_IRUGO | S_IWUSR, show_temp_auto_temp_min, \ 987 set_temp_auto_temp_min, offset - 1); \ 988 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_max, \ 989 S_IRUGO | S_IWUSR, show_temp_auto_temp_max, \ 990 set_temp_auto_temp_max, offset - 1); \ 991 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_crit, \ 992 S_IRUGO | S_IWUSR, show_temp_auto_temp_crit, \ 993 set_temp_auto_temp_crit, offset - 1); 994 995 temp_auto(1); 996 temp_auto(2); 997 temp_auto(3); 998 999 static struct attribute *lm85_attributes[] = { 1000 &sensor_dev_attr_fan1_input.dev_attr.attr, 1001 &sensor_dev_attr_fan2_input.dev_attr.attr, 1002 &sensor_dev_attr_fan3_input.dev_attr.attr, 1003 &sensor_dev_attr_fan4_input.dev_attr.attr, 1004 &sensor_dev_attr_fan1_min.dev_attr.attr, 1005 &sensor_dev_attr_fan2_min.dev_attr.attr, 1006 &sensor_dev_attr_fan3_min.dev_attr.attr, 1007 &sensor_dev_attr_fan4_min.dev_attr.attr, 1008 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1009 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1010 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1011 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1012 1013 &sensor_dev_attr_pwm1.dev_attr.attr, 1014 &sensor_dev_attr_pwm2.dev_attr.attr, 1015 &sensor_dev_attr_pwm3.dev_attr.attr, 1016 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1017 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1018 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1019 &sensor_dev_attr_pwm1_freq.dev_attr.attr, 1020 &sensor_dev_attr_pwm2_freq.dev_attr.attr, 1021 &sensor_dev_attr_pwm3_freq.dev_attr.attr, 1022 1023 &sensor_dev_attr_in0_input.dev_attr.attr, 1024 &sensor_dev_attr_in1_input.dev_attr.attr, 1025 &sensor_dev_attr_in2_input.dev_attr.attr, 1026 &sensor_dev_attr_in3_input.dev_attr.attr, 1027 &sensor_dev_attr_in0_min.dev_attr.attr, 1028 &sensor_dev_attr_in1_min.dev_attr.attr, 1029 &sensor_dev_attr_in2_min.dev_attr.attr, 1030 &sensor_dev_attr_in3_min.dev_attr.attr, 1031 &sensor_dev_attr_in0_max.dev_attr.attr, 1032 &sensor_dev_attr_in1_max.dev_attr.attr, 1033 &sensor_dev_attr_in2_max.dev_attr.attr, 1034 &sensor_dev_attr_in3_max.dev_attr.attr, 1035 &sensor_dev_attr_in0_alarm.dev_attr.attr, 1036 &sensor_dev_attr_in1_alarm.dev_attr.attr, 1037 &sensor_dev_attr_in2_alarm.dev_attr.attr, 1038 &sensor_dev_attr_in3_alarm.dev_attr.attr, 1039 1040 &sensor_dev_attr_temp1_input.dev_attr.attr, 1041 &sensor_dev_attr_temp2_input.dev_attr.attr, 1042 &sensor_dev_attr_temp3_input.dev_attr.attr, 1043 &sensor_dev_attr_temp1_min.dev_attr.attr, 1044 &sensor_dev_attr_temp2_min.dev_attr.attr, 1045 &sensor_dev_attr_temp3_min.dev_attr.attr, 1046 &sensor_dev_attr_temp1_max.dev_attr.attr, 1047 &sensor_dev_attr_temp2_max.dev_attr.attr, 1048 &sensor_dev_attr_temp3_max.dev_attr.attr, 1049 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1050 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1051 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1052 &sensor_dev_attr_temp1_fault.dev_attr.attr, 1053 &sensor_dev_attr_temp3_fault.dev_attr.attr, 1054 1055 &sensor_dev_attr_pwm1_auto_channels.dev_attr.attr, 1056 &sensor_dev_attr_pwm2_auto_channels.dev_attr.attr, 1057 &sensor_dev_attr_pwm3_auto_channels.dev_attr.attr, 1058 &sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr, 1059 &sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr, 1060 &sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr, 1061 &sensor_dev_attr_pwm1_auto_pwm_minctl.dev_attr.attr, 1062 &sensor_dev_attr_pwm2_auto_pwm_minctl.dev_attr.attr, 1063 &sensor_dev_attr_pwm3_auto_pwm_minctl.dev_attr.attr, 1064 1065 &sensor_dev_attr_temp1_auto_temp_off.dev_attr.attr, 1066 &sensor_dev_attr_temp2_auto_temp_off.dev_attr.attr, 1067 &sensor_dev_attr_temp3_auto_temp_off.dev_attr.attr, 1068 &sensor_dev_attr_temp1_auto_temp_min.dev_attr.attr, 1069 &sensor_dev_attr_temp2_auto_temp_min.dev_attr.attr, 1070 &sensor_dev_attr_temp3_auto_temp_min.dev_attr.attr, 1071 &sensor_dev_attr_temp1_auto_temp_max.dev_attr.attr, 1072 &sensor_dev_attr_temp2_auto_temp_max.dev_attr.attr, 1073 &sensor_dev_attr_temp3_auto_temp_max.dev_attr.attr, 1074 &sensor_dev_attr_temp1_auto_temp_crit.dev_attr.attr, 1075 &sensor_dev_attr_temp2_auto_temp_crit.dev_attr.attr, 1076 &sensor_dev_attr_temp3_auto_temp_crit.dev_attr.attr, 1077 1078 &dev_attr_vrm.attr, 1079 &dev_attr_cpu0_vid.attr, 1080 &dev_attr_alarms.attr, 1081 NULL 1082 }; 1083 1084 static const struct attribute_group lm85_group = { 1085 .attrs = lm85_attributes, 1086 }; 1087 1088 static struct attribute *lm85_attributes_in4[] = { 1089 &sensor_dev_attr_in4_input.dev_attr.attr, 1090 &sensor_dev_attr_in4_min.dev_attr.attr, 1091 &sensor_dev_attr_in4_max.dev_attr.attr, 1092 &sensor_dev_attr_in4_alarm.dev_attr.attr, 1093 NULL 1094 }; 1095 1096 static const struct attribute_group lm85_group_in4 = { 1097 .attrs = lm85_attributes_in4, 1098 }; 1099 1100 static struct attribute *lm85_attributes_in567[] = { 1101 &sensor_dev_attr_in5_input.dev_attr.attr, 1102 &sensor_dev_attr_in6_input.dev_attr.attr, 1103 &sensor_dev_attr_in7_input.dev_attr.attr, 1104 &sensor_dev_attr_in5_min.dev_attr.attr, 1105 &sensor_dev_attr_in6_min.dev_attr.attr, 1106 &sensor_dev_attr_in7_min.dev_attr.attr, 1107 &sensor_dev_attr_in5_max.dev_attr.attr, 1108 &sensor_dev_attr_in6_max.dev_attr.attr, 1109 &sensor_dev_attr_in7_max.dev_attr.attr, 1110 &sensor_dev_attr_in5_alarm.dev_attr.attr, 1111 &sensor_dev_attr_in6_alarm.dev_attr.attr, 1112 &sensor_dev_attr_in7_alarm.dev_attr.attr, 1113 NULL 1114 }; 1115 1116 static const struct attribute_group lm85_group_in567 = { 1117 .attrs = lm85_attributes_in567, 1118 }; 1119 1120 static void lm85_init_client(struct i2c_client *client) 1121 { 1122 int value; 1123 1124 /* Start monitoring if needed */ 1125 value = lm85_read_value(client, LM85_REG_CONFIG); 1126 if (!(value & 0x01)) { 1127 dev_info(&client->dev, "Starting monitoring\n"); 1128 lm85_write_value(client, LM85_REG_CONFIG, value | 0x01); 1129 } 1130 1131 /* Warn about unusual configuration bits */ 1132 if (value & 0x02) 1133 dev_warn(&client->dev, "Device configuration is locked\n"); 1134 if (!(value & 0x04)) 1135 dev_warn(&client->dev, "Device is not ready\n"); 1136 } 1137 1138 static int lm85_is_fake(struct i2c_client *client) 1139 { 1140 /* 1141 * Differenciate between real LM96000 and Winbond WPCD377I. The latter 1142 * emulate the former except that it has no hardware monitoring function 1143 * so the readings are always 0. 1144 */ 1145 int i; 1146 u8 in_temp, fan; 1147 1148 for (i = 0; i < 8; i++) { 1149 in_temp = i2c_smbus_read_byte_data(client, 0x20 + i); 1150 fan = i2c_smbus_read_byte_data(client, 0x28 + i); 1151 if (in_temp != 0x00 || fan != 0xff) 1152 return 0; 1153 } 1154 1155 return 1; 1156 } 1157 1158 /* Return 0 if detection is successful, -ENODEV otherwise */ 1159 static int lm85_detect(struct i2c_client *client, int kind, 1160 struct i2c_board_info *info) 1161 { 1162 struct i2c_adapter *adapter = client->adapter; 1163 int address = client->addr; 1164 const char *type_name; 1165 1166 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { 1167 /* We need to be able to do byte I/O */ 1168 return -ENODEV; 1169 } 1170 1171 /* If auto-detecting, determine the chip type */ 1172 if (kind < 0) { 1173 int company = lm85_read_value(client, LM85_REG_COMPANY); 1174 int verstep = lm85_read_value(client, LM85_REG_VERSTEP); 1175 1176 dev_dbg(&adapter->dev, "Detecting device at 0x%02x with " 1177 "COMPANY: 0x%02x and VERSTEP: 0x%02x\n", 1178 address, company, verstep); 1179 1180 /* All supported chips have the version in common */ 1181 if ((verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC && 1182 (verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC2) { 1183 dev_dbg(&adapter->dev, "Autodetection failed: " 1184 "unsupported version\n"); 1185 return -ENODEV; 1186 } 1187 kind = any_chip; 1188 1189 /* Now, refine the detection */ 1190 if (company == LM85_COMPANY_NATIONAL) { 1191 switch (verstep) { 1192 case LM85_VERSTEP_LM85C: 1193 kind = lm85c; 1194 break; 1195 case LM85_VERSTEP_LM85B: 1196 kind = lm85b; 1197 break; 1198 case LM85_VERSTEP_LM96000_1: 1199 case LM85_VERSTEP_LM96000_2: 1200 /* Check for Winbond WPCD377I */ 1201 if (lm85_is_fake(client)) { 1202 dev_dbg(&adapter->dev, 1203 "Found Winbond WPCD377I, " 1204 "ignoring\n"); 1205 return -ENODEV; 1206 } 1207 break; 1208 } 1209 } else if (company == LM85_COMPANY_ANALOG_DEV) { 1210 switch (verstep) { 1211 case LM85_VERSTEP_ADM1027: 1212 kind = adm1027; 1213 break; 1214 case LM85_VERSTEP_ADT7463: 1215 case LM85_VERSTEP_ADT7463C: 1216 kind = adt7463; 1217 break; 1218 case LM85_VERSTEP_ADT7468_1: 1219 case LM85_VERSTEP_ADT7468_2: 1220 kind = adt7468; 1221 break; 1222 } 1223 } else if (company == LM85_COMPANY_SMSC) { 1224 switch (verstep) { 1225 case LM85_VERSTEP_EMC6D100_A0: 1226 case LM85_VERSTEP_EMC6D100_A1: 1227 /* Note: we can't tell a '100 from a '101 */ 1228 kind = emc6d100; 1229 break; 1230 case LM85_VERSTEP_EMC6D102: 1231 kind = emc6d102; 1232 break; 1233 } 1234 } else { 1235 dev_dbg(&adapter->dev, "Autodetection failed: " 1236 "unknown vendor\n"); 1237 return -ENODEV; 1238 } 1239 } 1240 1241 switch (kind) { 1242 case lm85b: 1243 type_name = "lm85b"; 1244 break; 1245 case lm85c: 1246 type_name = "lm85c"; 1247 break; 1248 case adm1027: 1249 type_name = "adm1027"; 1250 break; 1251 case adt7463: 1252 type_name = "adt7463"; 1253 break; 1254 case adt7468: 1255 type_name = "adt7468"; 1256 break; 1257 case emc6d100: 1258 type_name = "emc6d100"; 1259 break; 1260 case emc6d102: 1261 type_name = "emc6d102"; 1262 break; 1263 default: 1264 type_name = "lm85"; 1265 } 1266 strlcpy(info->type, type_name, I2C_NAME_SIZE); 1267 1268 return 0; 1269 } 1270 1271 static int lm85_probe(struct i2c_client *client, 1272 const struct i2c_device_id *id) 1273 { 1274 struct lm85_data *data; 1275 int err; 1276 1277 data = kzalloc(sizeof(struct lm85_data), GFP_KERNEL); 1278 if (!data) 1279 return -ENOMEM; 1280 1281 i2c_set_clientdata(client, data); 1282 data->type = id->driver_data; 1283 mutex_init(&data->update_lock); 1284 1285 /* Fill in the chip specific driver values */ 1286 switch (data->type) { 1287 case adm1027: 1288 case adt7463: 1289 case emc6d100: 1290 case emc6d102: 1291 data->freq_map = adm1027_freq_map; 1292 break; 1293 default: 1294 data->freq_map = lm85_freq_map; 1295 } 1296 1297 /* Set the VRM version */ 1298 data->vrm = vid_which_vrm(); 1299 1300 /* Initialize the LM85 chip */ 1301 lm85_init_client(client); 1302 1303 /* Register sysfs hooks */ 1304 err = sysfs_create_group(&client->dev.kobj, &lm85_group); 1305 if (err) 1306 goto err_kfree; 1307 1308 /* The ADT7463/68 have an optional VRM 10 mode where pin 21 is used 1309 as a sixth digital VID input rather than an analog input. */ 1310 data->vid = lm85_read_value(client, LM85_REG_VID); 1311 if (!((data->type == adt7463 || data->type == adt7468) && 1312 (data->vid & 0x80))) 1313 if ((err = sysfs_create_group(&client->dev.kobj, 1314 &lm85_group_in4))) 1315 goto err_remove_files; 1316 1317 /* The EMC6D100 has 3 additional voltage inputs */ 1318 if (data->type == emc6d100) 1319 if ((err = sysfs_create_group(&client->dev.kobj, 1320 &lm85_group_in567))) 1321 goto err_remove_files; 1322 1323 data->hwmon_dev = hwmon_device_register(&client->dev); 1324 if (IS_ERR(data->hwmon_dev)) { 1325 err = PTR_ERR(data->hwmon_dev); 1326 goto err_remove_files; 1327 } 1328 1329 return 0; 1330 1331 /* Error out and cleanup code */ 1332 err_remove_files: 1333 sysfs_remove_group(&client->dev.kobj, &lm85_group); 1334 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4); 1335 if (data->type == emc6d100) 1336 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567); 1337 err_kfree: 1338 kfree(data); 1339 return err; 1340 } 1341 1342 static int lm85_remove(struct i2c_client *client) 1343 { 1344 struct lm85_data *data = i2c_get_clientdata(client); 1345 hwmon_device_unregister(data->hwmon_dev); 1346 sysfs_remove_group(&client->dev.kobj, &lm85_group); 1347 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4); 1348 if (data->type == emc6d100) 1349 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567); 1350 kfree(data); 1351 return 0; 1352 } 1353 1354 1355 static int lm85_read_value(struct i2c_client *client, u8 reg) 1356 { 1357 int res; 1358 1359 /* What size location is it? */ 1360 switch (reg) { 1361 case LM85_REG_FAN(0): /* Read WORD data */ 1362 case LM85_REG_FAN(1): 1363 case LM85_REG_FAN(2): 1364 case LM85_REG_FAN(3): 1365 case LM85_REG_FAN_MIN(0): 1366 case LM85_REG_FAN_MIN(1): 1367 case LM85_REG_FAN_MIN(2): 1368 case LM85_REG_FAN_MIN(3): 1369 case LM85_REG_ALARM1: /* Read both bytes at once */ 1370 res = i2c_smbus_read_byte_data(client, reg) & 0xff; 1371 res |= i2c_smbus_read_byte_data(client, reg + 1) << 8; 1372 break; 1373 default: /* Read BYTE data */ 1374 res = i2c_smbus_read_byte_data(client, reg); 1375 break; 1376 } 1377 1378 return res; 1379 } 1380 1381 static void lm85_write_value(struct i2c_client *client, u8 reg, int value) 1382 { 1383 switch (reg) { 1384 case LM85_REG_FAN(0): /* Write WORD data */ 1385 case LM85_REG_FAN(1): 1386 case LM85_REG_FAN(2): 1387 case LM85_REG_FAN(3): 1388 case LM85_REG_FAN_MIN(0): 1389 case LM85_REG_FAN_MIN(1): 1390 case LM85_REG_FAN_MIN(2): 1391 case LM85_REG_FAN_MIN(3): 1392 /* NOTE: ALARM is read only, so not included here */ 1393 i2c_smbus_write_byte_data(client, reg, value & 0xff); 1394 i2c_smbus_write_byte_data(client, reg + 1, value >> 8); 1395 break; 1396 default: /* Write BYTE data */ 1397 i2c_smbus_write_byte_data(client, reg, value); 1398 break; 1399 } 1400 } 1401 1402 static struct lm85_data *lm85_update_device(struct device *dev) 1403 { 1404 struct i2c_client *client = to_i2c_client(dev); 1405 struct lm85_data *data = i2c_get_clientdata(client); 1406 int i; 1407 1408 mutex_lock(&data->update_lock); 1409 1410 if (!data->valid || 1411 time_after(jiffies, data->last_reading + LM85_DATA_INTERVAL)) { 1412 /* Things that change quickly */ 1413 dev_dbg(&client->dev, "Reading sensor values\n"); 1414 1415 /* Have to read extended bits first to "freeze" the 1416 * more significant bits that are read later. 1417 * There are 2 additional resolution bits per channel and we 1418 * have room for 4, so we shift them to the left. 1419 */ 1420 if (data->type == adm1027 || data->type == adt7463 || 1421 data->type == adt7468) { 1422 int ext1 = lm85_read_value(client, 1423 ADM1027_REG_EXTEND_ADC1); 1424 int ext2 = lm85_read_value(client, 1425 ADM1027_REG_EXTEND_ADC2); 1426 int val = (ext1 << 8) + ext2; 1427 1428 for (i = 0; i <= 4; i++) 1429 data->in_ext[i] = 1430 ((val >> (i * 2)) & 0x03) << 2; 1431 1432 for (i = 0; i <= 2; i++) 1433 data->temp_ext[i] = 1434 (val >> ((i + 4) * 2)) & 0x0c; 1435 } 1436 1437 data->vid = lm85_read_value(client, LM85_REG_VID); 1438 1439 for (i = 0; i <= 3; ++i) { 1440 data->in[i] = 1441 lm85_read_value(client, LM85_REG_IN(i)); 1442 data->fan[i] = 1443 lm85_read_value(client, LM85_REG_FAN(i)); 1444 } 1445 1446 if (!((data->type == adt7463 || data->type == adt7468) && 1447 (data->vid & 0x80))) { 1448 data->in[4] = lm85_read_value(client, 1449 LM85_REG_IN(4)); 1450 } 1451 1452 if (data->type == adt7468) 1453 data->cfg5 = lm85_read_value(client, ADT7468_REG_CFG5); 1454 1455 for (i = 0; i <= 2; ++i) { 1456 data->temp[i] = 1457 lm85_read_value(client, LM85_REG_TEMP(i)); 1458 data->pwm[i] = 1459 lm85_read_value(client, LM85_REG_PWM(i)); 1460 1461 if (IS_ADT7468_OFF64(data)) 1462 data->temp[i] -= 64; 1463 } 1464 1465 data->alarms = lm85_read_value(client, LM85_REG_ALARM1); 1466 1467 if (data->type == emc6d100) { 1468 /* Three more voltage sensors */ 1469 for (i = 5; i <= 7; ++i) { 1470 data->in[i] = lm85_read_value(client, 1471 EMC6D100_REG_IN(i)); 1472 } 1473 /* More alarm bits */ 1474 data->alarms |= lm85_read_value(client, 1475 EMC6D100_REG_ALARM3) << 16; 1476 } else if (data->type == emc6d102) { 1477 /* Have to read LSB bits after the MSB ones because 1478 the reading of the MSB bits has frozen the 1479 LSBs (backward from the ADM1027). 1480 */ 1481 int ext1 = lm85_read_value(client, 1482 EMC6D102_REG_EXTEND_ADC1); 1483 int ext2 = lm85_read_value(client, 1484 EMC6D102_REG_EXTEND_ADC2); 1485 int ext3 = lm85_read_value(client, 1486 EMC6D102_REG_EXTEND_ADC3); 1487 int ext4 = lm85_read_value(client, 1488 EMC6D102_REG_EXTEND_ADC4); 1489 data->in_ext[0] = ext3 & 0x0f; 1490 data->in_ext[1] = ext4 & 0x0f; 1491 data->in_ext[2] = ext4 >> 4; 1492 data->in_ext[3] = ext3 >> 4; 1493 data->in_ext[4] = ext2 >> 4; 1494 1495 data->temp_ext[0] = ext1 & 0x0f; 1496 data->temp_ext[1] = ext2 & 0x0f; 1497 data->temp_ext[2] = ext1 >> 4; 1498 } 1499 1500 data->last_reading = jiffies; 1501 } /* last_reading */ 1502 1503 if (!data->valid || 1504 time_after(jiffies, data->last_config + LM85_CONFIG_INTERVAL)) { 1505 /* Things that don't change often */ 1506 dev_dbg(&client->dev, "Reading config values\n"); 1507 1508 for (i = 0; i <= 3; ++i) { 1509 data->in_min[i] = 1510 lm85_read_value(client, LM85_REG_IN_MIN(i)); 1511 data->in_max[i] = 1512 lm85_read_value(client, LM85_REG_IN_MAX(i)); 1513 data->fan_min[i] = 1514 lm85_read_value(client, LM85_REG_FAN_MIN(i)); 1515 } 1516 1517 if (!((data->type == adt7463 || data->type == adt7468) && 1518 (data->vid & 0x80))) { 1519 data->in_min[4] = lm85_read_value(client, 1520 LM85_REG_IN_MIN(4)); 1521 data->in_max[4] = lm85_read_value(client, 1522 LM85_REG_IN_MAX(4)); 1523 } 1524 1525 if (data->type == emc6d100) { 1526 for (i = 5; i <= 7; ++i) { 1527 data->in_min[i] = lm85_read_value(client, 1528 EMC6D100_REG_IN_MIN(i)); 1529 data->in_max[i] = lm85_read_value(client, 1530 EMC6D100_REG_IN_MAX(i)); 1531 } 1532 } 1533 1534 for (i = 0; i <= 2; ++i) { 1535 int val; 1536 1537 data->temp_min[i] = 1538 lm85_read_value(client, LM85_REG_TEMP_MIN(i)); 1539 data->temp_max[i] = 1540 lm85_read_value(client, LM85_REG_TEMP_MAX(i)); 1541 1542 data->autofan[i].config = 1543 lm85_read_value(client, LM85_REG_AFAN_CONFIG(i)); 1544 val = lm85_read_value(client, LM85_REG_AFAN_RANGE(i)); 1545 data->pwm_freq[i] = val & 0x07; 1546 data->zone[i].range = val >> 4; 1547 data->autofan[i].min_pwm = 1548 lm85_read_value(client, LM85_REG_AFAN_MINPWM(i)); 1549 data->zone[i].limit = 1550 lm85_read_value(client, LM85_REG_AFAN_LIMIT(i)); 1551 data->zone[i].critical = 1552 lm85_read_value(client, LM85_REG_AFAN_CRITICAL(i)); 1553 1554 if (IS_ADT7468_OFF64(data)) { 1555 data->temp_min[i] -= 64; 1556 data->temp_max[i] -= 64; 1557 data->zone[i].limit -= 64; 1558 data->zone[i].critical -= 64; 1559 } 1560 } 1561 1562 i = lm85_read_value(client, LM85_REG_AFAN_SPIKE1); 1563 data->autofan[0].min_off = (i & 0x20) != 0; 1564 data->autofan[1].min_off = (i & 0x40) != 0; 1565 data->autofan[2].min_off = (i & 0x80) != 0; 1566 1567 i = lm85_read_value(client, LM85_REG_AFAN_HYST1); 1568 data->zone[0].hyst = i >> 4; 1569 data->zone[1].hyst = i & 0x0f; 1570 1571 i = lm85_read_value(client, LM85_REG_AFAN_HYST2); 1572 data->zone[2].hyst = i >> 4; 1573 1574 data->last_config = jiffies; 1575 } /* last_config */ 1576 1577 data->valid = 1; 1578 1579 mutex_unlock(&data->update_lock); 1580 1581 return data; 1582 } 1583 1584 1585 static int __init sm_lm85_init(void) 1586 { 1587 return i2c_add_driver(&lm85_driver); 1588 } 1589 1590 static void __exit sm_lm85_exit(void) 1591 { 1592 i2c_del_driver(&lm85_driver); 1593 } 1594 1595 MODULE_LICENSE("GPL"); 1596 MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com>, " 1597 "Margit Schubert-While <margitsw@t-online.de>, " 1598 "Justin Thiessen <jthiessen@penguincomputing.com>"); 1599 MODULE_DESCRIPTION("LM85-B, LM85-C driver"); 1600 1601 module_init(sm_lm85_init); 1602 module_exit(sm_lm85_exit); 1603