1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * adm1031.c - Part of lm_sensors, Linux kernel modules for hardware 4 * monitoring 5 * Based on lm75.c and lm85.c 6 * Supports adm1030 / adm1031 7 * Copyright (C) 2004 Alexandre d'Alton <alex@alexdalton.org> 8 * Reworked by Jean Delvare <jdelvare@suse.de> 9 */ 10 11 #include <linux/module.h> 12 #include <linux/init.h> 13 #include <linux/slab.h> 14 #include <linux/jiffies.h> 15 #include <linux/i2c.h> 16 #include <linux/hwmon.h> 17 #include <linux/hwmon-sysfs.h> 18 #include <linux/err.h> 19 #include <linux/mutex.h> 20 21 /* Following macros takes channel parameter starting from 0 to 2 */ 22 #define ADM1031_REG_FAN_SPEED(nr) (0x08 + (nr)) 23 #define ADM1031_REG_FAN_DIV(nr) (0x20 + (nr)) 24 #define ADM1031_REG_PWM (0x22) 25 #define ADM1031_REG_FAN_MIN(nr) (0x10 + (nr)) 26 #define ADM1031_REG_FAN_FILTER (0x23) 27 28 #define ADM1031_REG_TEMP_OFFSET(nr) (0x0d + (nr)) 29 #define ADM1031_REG_TEMP_MAX(nr) (0x14 + 4 * (nr)) 30 #define ADM1031_REG_TEMP_MIN(nr) (0x15 + 4 * (nr)) 31 #define ADM1031_REG_TEMP_CRIT(nr) (0x16 + 4 * (nr)) 32 33 #define ADM1031_REG_TEMP(nr) (0x0a + (nr)) 34 #define ADM1031_REG_AUTO_TEMP(nr) (0x24 + (nr)) 35 36 #define ADM1031_REG_STATUS(nr) (0x2 + (nr)) 37 38 #define ADM1031_REG_CONF1 0x00 39 #define ADM1031_REG_CONF2 0x01 40 #define ADM1031_REG_EXT_TEMP 0x06 41 42 #define ADM1031_CONF1_MONITOR_ENABLE 0x01 /* Monitoring enable */ 43 #define ADM1031_CONF1_PWM_INVERT 0x08 /* PWM Invert */ 44 #define ADM1031_CONF1_AUTO_MODE 0x80 /* Auto FAN */ 45 46 #define ADM1031_CONF2_PWM1_ENABLE 0x01 47 #define ADM1031_CONF2_PWM2_ENABLE 0x02 48 #define ADM1031_CONF2_TACH1_ENABLE 0x04 49 #define ADM1031_CONF2_TACH2_ENABLE 0x08 50 #define ADM1031_CONF2_TEMP_ENABLE(chan) (0x10 << (chan)) 51 52 #define ADM1031_UPDATE_RATE_MASK 0x1c 53 #define ADM1031_UPDATE_RATE_SHIFT 2 54 55 /* Addresses to scan */ 56 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; 57 58 enum chips { adm1030, adm1031 }; 59 60 typedef u8 auto_chan_table_t[8][2]; 61 62 /* Each client has this additional data */ 63 struct adm1031_data { 64 struct i2c_client *client; 65 const struct attribute_group *groups[3]; 66 struct mutex update_lock; 67 int chip_type; 68 bool valid; /* true if following fields are valid */ 69 unsigned long last_updated; /* In jiffies */ 70 unsigned int update_interval; /* In milliseconds */ 71 /* 72 * The chan_select_table contains the possible configurations for 73 * auto fan control. 74 */ 75 const auto_chan_table_t *chan_select_table; 76 u16 alarm; 77 u8 conf1; 78 u8 conf2; 79 u8 fan[2]; 80 u8 fan_div[2]; 81 u8 fan_min[2]; 82 u8 pwm[2]; 83 u8 old_pwm[2]; 84 s8 temp[3]; 85 u8 ext_temp[3]; 86 u8 auto_temp[3]; 87 u8 auto_temp_min[3]; 88 u8 auto_temp_off[3]; 89 u8 auto_temp_max[3]; 90 s8 temp_offset[3]; 91 s8 temp_min[3]; 92 s8 temp_max[3]; 93 s8 temp_crit[3]; 94 }; 95 96 static inline u8 adm1031_read_value(struct i2c_client *client, u8 reg) 97 { 98 return i2c_smbus_read_byte_data(client, reg); 99 } 100 101 static inline int 102 adm1031_write_value(struct i2c_client *client, u8 reg, unsigned int value) 103 { 104 return i2c_smbus_write_byte_data(client, reg, value); 105 } 106 107 static struct adm1031_data *adm1031_update_device(struct device *dev) 108 { 109 struct adm1031_data *data = dev_get_drvdata(dev); 110 struct i2c_client *client = data->client; 111 unsigned long next_update; 112 int chan; 113 114 mutex_lock(&data->update_lock); 115 116 next_update = data->last_updated 117 + msecs_to_jiffies(data->update_interval); 118 if (time_after(jiffies, next_update) || !data->valid) { 119 120 dev_dbg(&client->dev, "Starting adm1031 update\n"); 121 for (chan = 0; 122 chan < ((data->chip_type == adm1031) ? 3 : 2); chan++) { 123 u8 oldh, newh; 124 125 oldh = 126 adm1031_read_value(client, ADM1031_REG_TEMP(chan)); 127 data->ext_temp[chan] = 128 adm1031_read_value(client, ADM1031_REG_EXT_TEMP); 129 newh = 130 adm1031_read_value(client, ADM1031_REG_TEMP(chan)); 131 if (newh != oldh) { 132 data->ext_temp[chan] = 133 adm1031_read_value(client, 134 ADM1031_REG_EXT_TEMP); 135 #ifdef DEBUG 136 oldh = 137 adm1031_read_value(client, 138 ADM1031_REG_TEMP(chan)); 139 140 /* oldh is actually newer */ 141 if (newh != oldh) 142 dev_warn(&client->dev, 143 "Remote temperature may be wrong.\n"); 144 #endif 145 } 146 data->temp[chan] = newh; 147 148 data->temp_offset[chan] = 149 adm1031_read_value(client, 150 ADM1031_REG_TEMP_OFFSET(chan)); 151 data->temp_min[chan] = 152 adm1031_read_value(client, 153 ADM1031_REG_TEMP_MIN(chan)); 154 data->temp_max[chan] = 155 adm1031_read_value(client, 156 ADM1031_REG_TEMP_MAX(chan)); 157 data->temp_crit[chan] = 158 adm1031_read_value(client, 159 ADM1031_REG_TEMP_CRIT(chan)); 160 data->auto_temp[chan] = 161 adm1031_read_value(client, 162 ADM1031_REG_AUTO_TEMP(chan)); 163 164 } 165 166 data->conf1 = adm1031_read_value(client, ADM1031_REG_CONF1); 167 data->conf2 = adm1031_read_value(client, ADM1031_REG_CONF2); 168 169 data->alarm = adm1031_read_value(client, ADM1031_REG_STATUS(0)) 170 | (adm1031_read_value(client, ADM1031_REG_STATUS(1)) << 8); 171 if (data->chip_type == adm1030) 172 data->alarm &= 0xc0ff; 173 174 for (chan = 0; chan < (data->chip_type == adm1030 ? 1 : 2); 175 chan++) { 176 data->fan_div[chan] = 177 adm1031_read_value(client, 178 ADM1031_REG_FAN_DIV(chan)); 179 data->fan_min[chan] = 180 adm1031_read_value(client, 181 ADM1031_REG_FAN_MIN(chan)); 182 data->fan[chan] = 183 adm1031_read_value(client, 184 ADM1031_REG_FAN_SPEED(chan)); 185 data->pwm[chan] = 186 (adm1031_read_value(client, 187 ADM1031_REG_PWM) >> (4 * chan)) & 0x0f; 188 } 189 data->last_updated = jiffies; 190 data->valid = true; 191 } 192 193 mutex_unlock(&data->update_lock); 194 195 return data; 196 } 197 198 #define TEMP_TO_REG(val) (((val) < 0 ? ((val - 500) / 1000) : \ 199 ((val + 500) / 1000))) 200 201 #define TEMP_FROM_REG(val) ((val) * 1000) 202 203 #define TEMP_FROM_REG_EXT(val, ext) (TEMP_FROM_REG(val) + (ext) * 125) 204 205 #define TEMP_OFFSET_TO_REG(val) (TEMP_TO_REG(val) & 0x8f) 206 #define TEMP_OFFSET_FROM_REG(val) TEMP_FROM_REG((val) < 0 ? \ 207 (val) | 0x70 : (val)) 208 209 #define FAN_FROM_REG(reg, div) ((reg) ? \ 210 (11250 * 60) / ((reg) * (div)) : 0) 211 212 static int FAN_TO_REG(int reg, int div) 213 { 214 int tmp; 215 tmp = FAN_FROM_REG(clamp_val(reg, 0, 65535), div); 216 return tmp > 255 ? 255 : tmp; 217 } 218 219 #define FAN_DIV_FROM_REG(reg) (1<<(((reg)&0xc0)>>6)) 220 221 #define PWM_TO_REG(val) (clamp_val((val), 0, 255) >> 4) 222 #define PWM_FROM_REG(val) ((val) << 4) 223 224 #define FAN_CHAN_FROM_REG(reg) (((reg) >> 5) & 7) 225 #define FAN_CHAN_TO_REG(val, reg) \ 226 (((reg) & 0x1F) | (((val) << 5) & 0xe0)) 227 228 #define AUTO_TEMP_MIN_TO_REG(val, reg) \ 229 ((((val) / 500) & 0xf8) | ((reg) & 0x7)) 230 #define AUTO_TEMP_RANGE_FROM_REG(reg) (5000 * (1 << ((reg) & 0x7))) 231 #define AUTO_TEMP_MIN_FROM_REG(reg) (1000 * ((((reg) >> 3) & 0x1f) << 2)) 232 233 #define AUTO_TEMP_MIN_FROM_REG_DEG(reg) ((((reg) >> 3) & 0x1f) << 2) 234 235 #define AUTO_TEMP_OFF_FROM_REG(reg) \ 236 (AUTO_TEMP_MIN_FROM_REG(reg) - 5000) 237 238 #define AUTO_TEMP_MAX_FROM_REG(reg) \ 239 (AUTO_TEMP_RANGE_FROM_REG(reg) + \ 240 AUTO_TEMP_MIN_FROM_REG(reg)) 241 242 static int AUTO_TEMP_MAX_TO_REG(int val, int reg, int pwm) 243 { 244 int ret; 245 int range = ((val - AUTO_TEMP_MIN_FROM_REG(reg)) * 10) / (16 - pwm); 246 247 ret = ((reg & 0xf8) | 248 (range < 10000 ? 0 : 249 range < 20000 ? 1 : 250 range < 40000 ? 2 : range < 80000 ? 3 : 4)); 251 return ret; 252 } 253 254 /* FAN auto control */ 255 #define GET_FAN_AUTO_BITFIELD(data, idx) \ 256 (*(data)->chan_select_table)[FAN_CHAN_FROM_REG((data)->conf1)][idx % 2] 257 258 /* 259 * The tables below contains the possible values for the auto fan 260 * control bitfields. the index in the table is the register value. 261 * MSb is the auto fan control enable bit, so the four first entries 262 * in the table disables auto fan control when both bitfields are zero. 263 */ 264 static const auto_chan_table_t auto_channel_select_table_adm1031 = { 265 { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, 266 { 2 /* 0b010 */ , 4 /* 0b100 */ }, 267 { 2 /* 0b010 */ , 2 /* 0b010 */ }, 268 { 4 /* 0b100 */ , 4 /* 0b100 */ }, 269 { 7 /* 0b111 */ , 7 /* 0b111 */ }, 270 }; 271 272 static const auto_chan_table_t auto_channel_select_table_adm1030 = { 273 { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, 274 { 2 /* 0b10 */ , 0 }, 275 { 0xff /* invalid */ , 0 }, 276 { 0xff /* invalid */ , 0 }, 277 { 3 /* 0b11 */ , 0 }, 278 }; 279 280 /* 281 * That function checks if a bitfield is valid and returns the other bitfield 282 * nearest match if no exact match where found. 283 */ 284 static int 285 get_fan_auto_nearest(struct adm1031_data *data, int chan, u8 val, u8 reg) 286 { 287 int i; 288 int first_match = -1, exact_match = -1; 289 u8 other_reg_val = 290 (*data->chan_select_table)[FAN_CHAN_FROM_REG(reg)][chan ? 0 : 1]; 291 292 if (val == 0) 293 return 0; 294 295 for (i = 0; i < 8; i++) { 296 if ((val == (*data->chan_select_table)[i][chan]) && 297 ((*data->chan_select_table)[i][chan ? 0 : 1] == 298 other_reg_val)) { 299 /* We found an exact match */ 300 exact_match = i; 301 break; 302 } else if (val == (*data->chan_select_table)[i][chan] && 303 first_match == -1) { 304 /* 305 * Save the first match in case of an exact match has 306 * not been found 307 */ 308 first_match = i; 309 } 310 } 311 312 if (exact_match >= 0) 313 return exact_match; 314 else if (first_match >= 0) 315 return first_match; 316 317 return -EINVAL; 318 } 319 320 static ssize_t fan_auto_channel_show(struct device *dev, 321 struct device_attribute *attr, char *buf) 322 { 323 int nr = to_sensor_dev_attr(attr)->index; 324 struct adm1031_data *data = adm1031_update_device(dev); 325 return sprintf(buf, "%d\n", GET_FAN_AUTO_BITFIELD(data, nr)); 326 } 327 328 static ssize_t 329 fan_auto_channel_store(struct device *dev, struct device_attribute *attr, 330 const char *buf, size_t count) 331 { 332 struct adm1031_data *data = dev_get_drvdata(dev); 333 struct i2c_client *client = data->client; 334 int nr = to_sensor_dev_attr(attr)->index; 335 long val; 336 u8 reg; 337 int ret; 338 u8 old_fan_mode; 339 340 ret = kstrtol(buf, 10, &val); 341 if (ret) 342 return ret; 343 344 old_fan_mode = data->conf1; 345 346 mutex_lock(&data->update_lock); 347 348 ret = get_fan_auto_nearest(data, nr, val, data->conf1); 349 if (ret < 0) { 350 mutex_unlock(&data->update_lock); 351 return ret; 352 } 353 reg = ret; 354 data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1); 355 if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) ^ 356 (old_fan_mode & ADM1031_CONF1_AUTO_MODE)) { 357 if (data->conf1 & ADM1031_CONF1_AUTO_MODE) { 358 /* 359 * Switch to Auto Fan Mode 360 * Save PWM registers 361 * Set PWM registers to 33% Both 362 */ 363 data->old_pwm[0] = data->pwm[0]; 364 data->old_pwm[1] = data->pwm[1]; 365 adm1031_write_value(client, ADM1031_REG_PWM, 0x55); 366 } else { 367 /* Switch to Manual Mode */ 368 data->pwm[0] = data->old_pwm[0]; 369 data->pwm[1] = data->old_pwm[1]; 370 /* Restore PWM registers */ 371 adm1031_write_value(client, ADM1031_REG_PWM, 372 data->pwm[0] | (data->pwm[1] << 4)); 373 } 374 } 375 data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1); 376 adm1031_write_value(client, ADM1031_REG_CONF1, data->conf1); 377 mutex_unlock(&data->update_lock); 378 return count; 379 } 380 381 static SENSOR_DEVICE_ATTR_RW(auto_fan1_channel, fan_auto_channel, 0); 382 static SENSOR_DEVICE_ATTR_RW(auto_fan2_channel, fan_auto_channel, 1); 383 384 /* Auto Temps */ 385 static ssize_t auto_temp_off_show(struct device *dev, 386 struct device_attribute *attr, char *buf) 387 { 388 int nr = to_sensor_dev_attr(attr)->index; 389 struct adm1031_data *data = adm1031_update_device(dev); 390 return sprintf(buf, "%d\n", 391 AUTO_TEMP_OFF_FROM_REG(data->auto_temp[nr])); 392 } 393 static ssize_t auto_temp_min_show(struct device *dev, 394 struct device_attribute *attr, char *buf) 395 { 396 int nr = to_sensor_dev_attr(attr)->index; 397 struct adm1031_data *data = adm1031_update_device(dev); 398 return sprintf(buf, "%d\n", 399 AUTO_TEMP_MIN_FROM_REG(data->auto_temp[nr])); 400 } 401 static ssize_t 402 auto_temp_min_store(struct device *dev, struct device_attribute *attr, 403 const char *buf, size_t count) 404 { 405 struct adm1031_data *data = dev_get_drvdata(dev); 406 struct i2c_client *client = data->client; 407 int nr = to_sensor_dev_attr(attr)->index; 408 long val; 409 int ret; 410 411 ret = kstrtol(buf, 10, &val); 412 if (ret) 413 return ret; 414 415 val = clamp_val(val, 0, 127000); 416 mutex_lock(&data->update_lock); 417 data->auto_temp[nr] = AUTO_TEMP_MIN_TO_REG(val, data->auto_temp[nr]); 418 adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr), 419 data->auto_temp[nr]); 420 mutex_unlock(&data->update_lock); 421 return count; 422 } 423 static ssize_t auto_temp_max_show(struct device *dev, 424 struct device_attribute *attr, char *buf) 425 { 426 int nr = to_sensor_dev_attr(attr)->index; 427 struct adm1031_data *data = adm1031_update_device(dev); 428 return sprintf(buf, "%d\n", 429 AUTO_TEMP_MAX_FROM_REG(data->auto_temp[nr])); 430 } 431 static ssize_t 432 auto_temp_max_store(struct device *dev, struct device_attribute *attr, 433 const char *buf, size_t count) 434 { 435 struct adm1031_data *data = dev_get_drvdata(dev); 436 struct i2c_client *client = data->client; 437 int nr = to_sensor_dev_attr(attr)->index; 438 long val; 439 int ret; 440 441 ret = kstrtol(buf, 10, &val); 442 if (ret) 443 return ret; 444 445 val = clamp_val(val, 0, 127000); 446 mutex_lock(&data->update_lock); 447 data->temp_max[nr] = AUTO_TEMP_MAX_TO_REG(val, data->auto_temp[nr], 448 data->pwm[nr]); 449 adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr), 450 data->temp_max[nr]); 451 mutex_unlock(&data->update_lock); 452 return count; 453 } 454 455 static SENSOR_DEVICE_ATTR_RO(auto_temp1_off, auto_temp_off, 0); 456 static SENSOR_DEVICE_ATTR_RW(auto_temp1_min, auto_temp_min, 0); 457 static SENSOR_DEVICE_ATTR_RW(auto_temp1_max, auto_temp_max, 0); 458 static SENSOR_DEVICE_ATTR_RO(auto_temp2_off, auto_temp_off, 1); 459 static SENSOR_DEVICE_ATTR_RW(auto_temp2_min, auto_temp_min, 1); 460 static SENSOR_DEVICE_ATTR_RW(auto_temp2_max, auto_temp_max, 1); 461 static SENSOR_DEVICE_ATTR_RO(auto_temp3_off, auto_temp_off, 2); 462 static SENSOR_DEVICE_ATTR_RW(auto_temp3_min, auto_temp_min, 2); 463 static SENSOR_DEVICE_ATTR_RW(auto_temp3_max, auto_temp_max, 2); 464 465 /* pwm */ 466 static ssize_t pwm_show(struct device *dev, struct device_attribute *attr, 467 char *buf) 468 { 469 int nr = to_sensor_dev_attr(attr)->index; 470 struct adm1031_data *data = adm1031_update_device(dev); 471 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr])); 472 } 473 static ssize_t pwm_store(struct device *dev, struct device_attribute *attr, 474 const char *buf, size_t count) 475 { 476 struct adm1031_data *data = dev_get_drvdata(dev); 477 struct i2c_client *client = data->client; 478 int nr = to_sensor_dev_attr(attr)->index; 479 long val; 480 int ret, reg; 481 482 ret = kstrtol(buf, 10, &val); 483 if (ret) 484 return ret; 485 486 mutex_lock(&data->update_lock); 487 if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) && 488 (((val>>4) & 0xf) != 5)) { 489 /* In automatic mode, the only PWM accepted is 33% */ 490 mutex_unlock(&data->update_lock); 491 return -EINVAL; 492 } 493 data->pwm[nr] = PWM_TO_REG(val); 494 reg = adm1031_read_value(client, ADM1031_REG_PWM); 495 adm1031_write_value(client, ADM1031_REG_PWM, 496 nr ? ((data->pwm[nr] << 4) & 0xf0) | (reg & 0xf) 497 : (data->pwm[nr] & 0xf) | (reg & 0xf0)); 498 mutex_unlock(&data->update_lock); 499 return count; 500 } 501 502 static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0); 503 static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1); 504 static SENSOR_DEVICE_ATTR_RW(auto_fan1_min_pwm, pwm, 0); 505 static SENSOR_DEVICE_ATTR_RW(auto_fan2_min_pwm, pwm, 1); 506 507 /* Fans */ 508 509 /* 510 * That function checks the cases where the fan reading is not 511 * relevant. It is used to provide 0 as fan reading when the fan is 512 * not supposed to run 513 */ 514 static int trust_fan_readings(struct adm1031_data *data, int chan) 515 { 516 int res = 0; 517 518 if (data->conf1 & ADM1031_CONF1_AUTO_MODE) { 519 switch (data->conf1 & 0x60) { 520 case 0x00: 521 /* 522 * remote temp1 controls fan1, 523 * remote temp2 controls fan2 524 */ 525 res = data->temp[chan+1] >= 526 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[chan+1]); 527 break; 528 case 0x20: /* remote temp1 controls both fans */ 529 res = 530 data->temp[1] >= 531 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1]); 532 break; 533 case 0x40: /* remote temp2 controls both fans */ 534 res = 535 data->temp[2] >= 536 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]); 537 break; 538 case 0x60: /* max controls both fans */ 539 res = 540 data->temp[0] >= 541 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[0]) 542 || data->temp[1] >= 543 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1]) 544 || (data->chip_type == adm1031 545 && data->temp[2] >= 546 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2])); 547 break; 548 } 549 } else { 550 res = data->pwm[chan] > 0; 551 } 552 return res; 553 } 554 555 static ssize_t fan_show(struct device *dev, struct device_attribute *attr, 556 char *buf) 557 { 558 int nr = to_sensor_dev_attr(attr)->index; 559 struct adm1031_data *data = adm1031_update_device(dev); 560 int value; 561 562 value = trust_fan_readings(data, nr) ? FAN_FROM_REG(data->fan[nr], 563 FAN_DIV_FROM_REG(data->fan_div[nr])) : 0; 564 return sprintf(buf, "%d\n", value); 565 } 566 567 static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr, 568 char *buf) 569 { 570 int nr = to_sensor_dev_attr(attr)->index; 571 struct adm1031_data *data = adm1031_update_device(dev); 572 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[nr])); 573 } 574 static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr, 575 char *buf) 576 { 577 int nr = to_sensor_dev_attr(attr)->index; 578 struct adm1031_data *data = adm1031_update_device(dev); 579 return sprintf(buf, "%d\n", 580 FAN_FROM_REG(data->fan_min[nr], 581 FAN_DIV_FROM_REG(data->fan_div[nr]))); 582 } 583 static ssize_t fan_min_store(struct device *dev, 584 struct device_attribute *attr, const char *buf, 585 size_t count) 586 { 587 struct adm1031_data *data = dev_get_drvdata(dev); 588 struct i2c_client *client = data->client; 589 int nr = to_sensor_dev_attr(attr)->index; 590 long val; 591 int ret; 592 593 ret = kstrtol(buf, 10, &val); 594 if (ret) 595 return ret; 596 597 mutex_lock(&data->update_lock); 598 if (val) { 599 data->fan_min[nr] = 600 FAN_TO_REG(val, FAN_DIV_FROM_REG(data->fan_div[nr])); 601 } else { 602 data->fan_min[nr] = 0xff; 603 } 604 adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), data->fan_min[nr]); 605 mutex_unlock(&data->update_lock); 606 return count; 607 } 608 static ssize_t fan_div_store(struct device *dev, 609 struct device_attribute *attr, const char *buf, 610 size_t count) 611 { 612 struct adm1031_data *data = dev_get_drvdata(dev); 613 struct i2c_client *client = data->client; 614 int nr = to_sensor_dev_attr(attr)->index; 615 long val; 616 u8 tmp; 617 int old_div; 618 int new_min; 619 int ret; 620 621 ret = kstrtol(buf, 10, &val); 622 if (ret) 623 return ret; 624 625 tmp = val == 8 ? 0xc0 : 626 val == 4 ? 0x80 : 627 val == 2 ? 0x40 : 628 val == 1 ? 0x00 : 629 0xff; 630 if (tmp == 0xff) 631 return -EINVAL; 632 633 mutex_lock(&data->update_lock); 634 /* Get fresh readings */ 635 data->fan_div[nr] = adm1031_read_value(client, 636 ADM1031_REG_FAN_DIV(nr)); 637 data->fan_min[nr] = adm1031_read_value(client, 638 ADM1031_REG_FAN_MIN(nr)); 639 640 /* Write the new clock divider and fan min */ 641 old_div = FAN_DIV_FROM_REG(data->fan_div[nr]); 642 data->fan_div[nr] = tmp | (0x3f & data->fan_div[nr]); 643 new_min = data->fan_min[nr] * old_div / val; 644 data->fan_min[nr] = new_min > 0xff ? 0xff : new_min; 645 646 adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr), 647 data->fan_div[nr]); 648 adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), 649 data->fan_min[nr]); 650 651 /* Invalidate the cache: fan speed is no longer valid */ 652 data->valid = false; 653 mutex_unlock(&data->update_lock); 654 return count; 655 } 656 657 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); 658 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); 659 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); 660 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); 661 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); 662 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); 663 664 /* Temps */ 665 static ssize_t temp_show(struct device *dev, struct device_attribute *attr, 666 char *buf) 667 { 668 int nr = to_sensor_dev_attr(attr)->index; 669 struct adm1031_data *data = adm1031_update_device(dev); 670 int ext; 671 ext = nr == 0 ? 672 ((data->ext_temp[nr] >> 6) & 0x3) * 2 : 673 (((data->ext_temp[nr] >> ((nr - 1) * 3)) & 7)); 674 return sprintf(buf, "%d\n", TEMP_FROM_REG_EXT(data->temp[nr], ext)); 675 } 676 static ssize_t temp_offset_show(struct device *dev, 677 struct device_attribute *attr, char *buf) 678 { 679 int nr = to_sensor_dev_attr(attr)->index; 680 struct adm1031_data *data = adm1031_update_device(dev); 681 return sprintf(buf, "%d\n", 682 TEMP_OFFSET_FROM_REG(data->temp_offset[nr])); 683 } 684 static ssize_t temp_min_show(struct device *dev, 685 struct device_attribute *attr, char *buf) 686 { 687 int nr = to_sensor_dev_attr(attr)->index; 688 struct adm1031_data *data = adm1031_update_device(dev); 689 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr])); 690 } 691 static ssize_t temp_max_show(struct device *dev, 692 struct device_attribute *attr, char *buf) 693 { 694 int nr = to_sensor_dev_attr(attr)->index; 695 struct adm1031_data *data = adm1031_update_device(dev); 696 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr])); 697 } 698 static ssize_t temp_crit_show(struct device *dev, 699 struct device_attribute *attr, char *buf) 700 { 701 int nr = to_sensor_dev_attr(attr)->index; 702 struct adm1031_data *data = adm1031_update_device(dev); 703 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit[nr])); 704 } 705 static ssize_t temp_offset_store(struct device *dev, 706 struct device_attribute *attr, 707 const char *buf, size_t count) 708 { 709 struct adm1031_data *data = dev_get_drvdata(dev); 710 struct i2c_client *client = data->client; 711 int nr = to_sensor_dev_attr(attr)->index; 712 long val; 713 int ret; 714 715 ret = kstrtol(buf, 10, &val); 716 if (ret) 717 return ret; 718 719 val = clamp_val(val, -15000, 15000); 720 mutex_lock(&data->update_lock); 721 data->temp_offset[nr] = TEMP_OFFSET_TO_REG(val); 722 adm1031_write_value(client, ADM1031_REG_TEMP_OFFSET(nr), 723 data->temp_offset[nr]); 724 mutex_unlock(&data->update_lock); 725 return count; 726 } 727 static ssize_t temp_min_store(struct device *dev, 728 struct device_attribute *attr, const char *buf, 729 size_t count) 730 { 731 struct adm1031_data *data = dev_get_drvdata(dev); 732 struct i2c_client *client = data->client; 733 int nr = to_sensor_dev_attr(attr)->index; 734 long val; 735 int ret; 736 737 ret = kstrtol(buf, 10, &val); 738 if (ret) 739 return ret; 740 741 val = clamp_val(val, -55000, 127000); 742 mutex_lock(&data->update_lock); 743 data->temp_min[nr] = TEMP_TO_REG(val); 744 adm1031_write_value(client, ADM1031_REG_TEMP_MIN(nr), 745 data->temp_min[nr]); 746 mutex_unlock(&data->update_lock); 747 return count; 748 } 749 static ssize_t temp_max_store(struct device *dev, 750 struct device_attribute *attr, const char *buf, 751 size_t count) 752 { 753 struct adm1031_data *data = dev_get_drvdata(dev); 754 struct i2c_client *client = data->client; 755 int nr = to_sensor_dev_attr(attr)->index; 756 long val; 757 int ret; 758 759 ret = kstrtol(buf, 10, &val); 760 if (ret) 761 return ret; 762 763 val = clamp_val(val, -55000, 127000); 764 mutex_lock(&data->update_lock); 765 data->temp_max[nr] = TEMP_TO_REG(val); 766 adm1031_write_value(client, ADM1031_REG_TEMP_MAX(nr), 767 data->temp_max[nr]); 768 mutex_unlock(&data->update_lock); 769 return count; 770 } 771 static ssize_t temp_crit_store(struct device *dev, 772 struct device_attribute *attr, const char *buf, 773 size_t count) 774 { 775 struct adm1031_data *data = dev_get_drvdata(dev); 776 struct i2c_client *client = data->client; 777 int nr = to_sensor_dev_attr(attr)->index; 778 long val; 779 int ret; 780 781 ret = kstrtol(buf, 10, &val); 782 if (ret) 783 return ret; 784 785 val = clamp_val(val, -55000, 127000); 786 mutex_lock(&data->update_lock); 787 data->temp_crit[nr] = TEMP_TO_REG(val); 788 adm1031_write_value(client, ADM1031_REG_TEMP_CRIT(nr), 789 data->temp_crit[nr]); 790 mutex_unlock(&data->update_lock); 791 return count; 792 } 793 794 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); 795 static SENSOR_DEVICE_ATTR_RW(temp1_offset, temp_offset, 0); 796 static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0); 797 static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0); 798 static SENSOR_DEVICE_ATTR_RW(temp1_crit, temp_crit, 0); 799 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); 800 static SENSOR_DEVICE_ATTR_RW(temp2_offset, temp_offset, 1); 801 static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1); 802 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); 803 static SENSOR_DEVICE_ATTR_RW(temp2_crit, temp_crit, 1); 804 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); 805 static SENSOR_DEVICE_ATTR_RW(temp3_offset, temp_offset, 2); 806 static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2); 807 static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2); 808 static SENSOR_DEVICE_ATTR_RW(temp3_crit, temp_crit, 2); 809 810 /* Alarms */ 811 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, 812 char *buf) 813 { 814 struct adm1031_data *data = adm1031_update_device(dev); 815 return sprintf(buf, "%d\n", data->alarm); 816 } 817 818 static DEVICE_ATTR_RO(alarms); 819 820 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, 821 char *buf) 822 { 823 int bitnr = to_sensor_dev_attr(attr)->index; 824 struct adm1031_data *data = adm1031_update_device(dev); 825 return sprintf(buf, "%d\n", (data->alarm >> bitnr) & 1); 826 } 827 828 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 0); 829 static SENSOR_DEVICE_ATTR_RO(fan1_fault, alarm, 1); 830 static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 2); 831 static SENSOR_DEVICE_ATTR_RO(temp2_min_alarm, alarm, 3); 832 static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, 4); 833 static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 5); 834 static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 6); 835 static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, alarm, 7); 836 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 8); 837 static SENSOR_DEVICE_ATTR_RO(fan2_fault, alarm, 9); 838 static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, 10); 839 static SENSOR_DEVICE_ATTR_RO(temp3_min_alarm, alarm, 11); 840 static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, 12); 841 static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 13); 842 static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 14); 843 844 /* Update Interval */ 845 static const unsigned int update_intervals[] = { 846 16000, 8000, 4000, 2000, 1000, 500, 250, 125, 847 }; 848 849 static ssize_t update_interval_show(struct device *dev, 850 struct device_attribute *attr, char *buf) 851 { 852 struct adm1031_data *data = dev_get_drvdata(dev); 853 854 return sprintf(buf, "%u\n", data->update_interval); 855 } 856 857 static ssize_t update_interval_store(struct device *dev, 858 struct device_attribute *attr, 859 const char *buf, size_t count) 860 { 861 struct adm1031_data *data = dev_get_drvdata(dev); 862 struct i2c_client *client = data->client; 863 unsigned long val; 864 int i, err; 865 u8 reg; 866 867 err = kstrtoul(buf, 10, &val); 868 if (err) 869 return err; 870 871 /* 872 * Find the nearest update interval from the table. 873 * Use it to determine the matching update rate. 874 */ 875 for (i = 0; i < ARRAY_SIZE(update_intervals) - 1; i++) { 876 if (val >= update_intervals[i]) 877 break; 878 } 879 /* if not found, we point to the last entry (lowest update interval) */ 880 881 /* set the new update rate while preserving other settings */ 882 reg = adm1031_read_value(client, ADM1031_REG_FAN_FILTER); 883 reg &= ~ADM1031_UPDATE_RATE_MASK; 884 reg |= i << ADM1031_UPDATE_RATE_SHIFT; 885 adm1031_write_value(client, ADM1031_REG_FAN_FILTER, reg); 886 887 mutex_lock(&data->update_lock); 888 data->update_interval = update_intervals[i]; 889 mutex_unlock(&data->update_lock); 890 891 return count; 892 } 893 894 static DEVICE_ATTR_RW(update_interval); 895 896 static struct attribute *adm1031_attributes[] = { 897 &sensor_dev_attr_fan1_input.dev_attr.attr, 898 &sensor_dev_attr_fan1_div.dev_attr.attr, 899 &sensor_dev_attr_fan1_min.dev_attr.attr, 900 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 901 &sensor_dev_attr_fan1_fault.dev_attr.attr, 902 &sensor_dev_attr_pwm1.dev_attr.attr, 903 &sensor_dev_attr_auto_fan1_channel.dev_attr.attr, 904 &sensor_dev_attr_temp1_input.dev_attr.attr, 905 &sensor_dev_attr_temp1_offset.dev_attr.attr, 906 &sensor_dev_attr_temp1_min.dev_attr.attr, 907 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, 908 &sensor_dev_attr_temp1_max.dev_attr.attr, 909 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 910 &sensor_dev_attr_temp1_crit.dev_attr.attr, 911 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, 912 &sensor_dev_attr_temp2_input.dev_attr.attr, 913 &sensor_dev_attr_temp2_offset.dev_attr.attr, 914 &sensor_dev_attr_temp2_min.dev_attr.attr, 915 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, 916 &sensor_dev_attr_temp2_max.dev_attr.attr, 917 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 918 &sensor_dev_attr_temp2_crit.dev_attr.attr, 919 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 920 &sensor_dev_attr_temp2_fault.dev_attr.attr, 921 922 &sensor_dev_attr_auto_temp1_off.dev_attr.attr, 923 &sensor_dev_attr_auto_temp1_min.dev_attr.attr, 924 &sensor_dev_attr_auto_temp1_max.dev_attr.attr, 925 926 &sensor_dev_attr_auto_temp2_off.dev_attr.attr, 927 &sensor_dev_attr_auto_temp2_min.dev_attr.attr, 928 &sensor_dev_attr_auto_temp2_max.dev_attr.attr, 929 930 &sensor_dev_attr_auto_fan1_min_pwm.dev_attr.attr, 931 932 &dev_attr_update_interval.attr, 933 &dev_attr_alarms.attr, 934 935 NULL 936 }; 937 938 static const struct attribute_group adm1031_group = { 939 .attrs = adm1031_attributes, 940 }; 941 942 static struct attribute *adm1031_attributes_opt[] = { 943 &sensor_dev_attr_fan2_input.dev_attr.attr, 944 &sensor_dev_attr_fan2_div.dev_attr.attr, 945 &sensor_dev_attr_fan2_min.dev_attr.attr, 946 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 947 &sensor_dev_attr_fan2_fault.dev_attr.attr, 948 &sensor_dev_attr_pwm2.dev_attr.attr, 949 &sensor_dev_attr_auto_fan2_channel.dev_attr.attr, 950 &sensor_dev_attr_temp3_input.dev_attr.attr, 951 &sensor_dev_attr_temp3_offset.dev_attr.attr, 952 &sensor_dev_attr_temp3_min.dev_attr.attr, 953 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, 954 &sensor_dev_attr_temp3_max.dev_attr.attr, 955 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, 956 &sensor_dev_attr_temp3_crit.dev_attr.attr, 957 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, 958 &sensor_dev_attr_temp3_fault.dev_attr.attr, 959 &sensor_dev_attr_auto_temp3_off.dev_attr.attr, 960 &sensor_dev_attr_auto_temp3_min.dev_attr.attr, 961 &sensor_dev_attr_auto_temp3_max.dev_attr.attr, 962 &sensor_dev_attr_auto_fan2_min_pwm.dev_attr.attr, 963 NULL 964 }; 965 966 static const struct attribute_group adm1031_group_opt = { 967 .attrs = adm1031_attributes_opt, 968 }; 969 970 /* Return 0 if detection is successful, -ENODEV otherwise */ 971 static int adm1031_detect(struct i2c_client *client, 972 struct i2c_board_info *info) 973 { 974 struct i2c_adapter *adapter = client->adapter; 975 const char *name; 976 int id, co; 977 978 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 979 return -ENODEV; 980 981 id = i2c_smbus_read_byte_data(client, 0x3d); 982 co = i2c_smbus_read_byte_data(client, 0x3e); 983 984 if (!((id == 0x31 || id == 0x30) && co == 0x41)) 985 return -ENODEV; 986 name = (id == 0x30) ? "adm1030" : "adm1031"; 987 988 strscpy(info->type, name, I2C_NAME_SIZE); 989 990 return 0; 991 } 992 993 static void adm1031_init_client(struct i2c_client *client) 994 { 995 unsigned int read_val; 996 unsigned int mask; 997 int i; 998 struct adm1031_data *data = i2c_get_clientdata(client); 999 1000 mask = (ADM1031_CONF2_PWM1_ENABLE | ADM1031_CONF2_TACH1_ENABLE); 1001 if (data->chip_type == adm1031) { 1002 mask |= (ADM1031_CONF2_PWM2_ENABLE | 1003 ADM1031_CONF2_TACH2_ENABLE); 1004 } 1005 /* Initialize the ADM1031 chip (enables fan speed reading ) */ 1006 read_val = adm1031_read_value(client, ADM1031_REG_CONF2); 1007 if ((read_val | mask) != read_val) 1008 adm1031_write_value(client, ADM1031_REG_CONF2, read_val | mask); 1009 1010 read_val = adm1031_read_value(client, ADM1031_REG_CONF1); 1011 if ((read_val | ADM1031_CONF1_MONITOR_ENABLE) != read_val) { 1012 adm1031_write_value(client, ADM1031_REG_CONF1, 1013 read_val | ADM1031_CONF1_MONITOR_ENABLE); 1014 } 1015 1016 /* Read the chip's update rate */ 1017 mask = ADM1031_UPDATE_RATE_MASK; 1018 read_val = adm1031_read_value(client, ADM1031_REG_FAN_FILTER); 1019 i = (read_val & mask) >> ADM1031_UPDATE_RATE_SHIFT; 1020 /* Save it as update interval */ 1021 data->update_interval = update_intervals[i]; 1022 } 1023 1024 static const struct i2c_device_id adm1031_id[]; 1025 1026 static int adm1031_probe(struct i2c_client *client) 1027 { 1028 struct device *dev = &client->dev; 1029 struct device *hwmon_dev; 1030 struct adm1031_data *data; 1031 1032 data = devm_kzalloc(dev, sizeof(struct adm1031_data), GFP_KERNEL); 1033 if (!data) 1034 return -ENOMEM; 1035 1036 i2c_set_clientdata(client, data); 1037 data->client = client; 1038 data->chip_type = i2c_match_id(adm1031_id, client)->driver_data; 1039 mutex_init(&data->update_lock); 1040 1041 if (data->chip_type == adm1030) 1042 data->chan_select_table = &auto_channel_select_table_adm1030; 1043 else 1044 data->chan_select_table = &auto_channel_select_table_adm1031; 1045 1046 /* Initialize the ADM1031 chip */ 1047 adm1031_init_client(client); 1048 1049 /* sysfs hooks */ 1050 data->groups[0] = &adm1031_group; 1051 if (data->chip_type == adm1031) 1052 data->groups[1] = &adm1031_group_opt; 1053 1054 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 1055 data, data->groups); 1056 return PTR_ERR_OR_ZERO(hwmon_dev); 1057 } 1058 1059 static const struct i2c_device_id adm1031_id[] = { 1060 { "adm1030", adm1030 }, 1061 { "adm1031", adm1031 }, 1062 { } 1063 }; 1064 MODULE_DEVICE_TABLE(i2c, adm1031_id); 1065 1066 static struct i2c_driver adm1031_driver = { 1067 .class = I2C_CLASS_HWMON, 1068 .driver = { 1069 .name = "adm1031", 1070 }, 1071 .probe = adm1031_probe, 1072 .id_table = adm1031_id, 1073 .detect = adm1031_detect, 1074 .address_list = normal_i2c, 1075 }; 1076 1077 module_i2c_driver(adm1031_driver); 1078 1079 MODULE_AUTHOR("Alexandre d'Alton <alex@alexdalton.org>"); 1080 MODULE_DESCRIPTION("ADM1031/ADM1030 driver"); 1081 MODULE_LICENSE("GPL"); 1082