1/* 2 amc6821.c - Part of lm_sensors, Linux kernel modules for hardware 3 monitoring 4 Copyright (C) 2009 T. Mertelj <tomaz.mertelj@guest.arnes.si> 5 6 Based on max6650.c: 7 Copyright (C) 2007 Hans J. Koch <hjk@linutronix.de> 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22*/ 23 24 25#include <linux/kernel.h> /* Needed for KERN_INFO */ 26#include <linux/module.h> 27#include <linux/init.h> 28#include <linux/slab.h> 29#include <linux/jiffies.h> 30#include <linux/i2c.h> 31#include <linux/hwmon.h> 32#include <linux/hwmon-sysfs.h> 33#include <linux/err.h> 34#include <linux/mutex.h> 35 36 37/* 38 * Addresses to scan. 39 */ 40 41static const unsigned short normal_i2c[] = {0x18, 0x19, 0x1a, 0x2c, 0x2d, 0x2e, 42 0x4c, 0x4d, 0x4e, I2C_CLIENT_END}; 43 44 45 46/* 47 * Insmod parameters 48 */ 49 50static int pwminv = 0; /*Inverted PWM output. */ 51module_param(pwminv, int, S_IRUGO); 52 53static int init = 1; /*Power-on initialization.*/ 54module_param(init, int, S_IRUGO); 55 56 57enum chips { amc6821 }; 58 59#define AMC6821_REG_DEV_ID 0x3D 60#define AMC6821_REG_COMP_ID 0x3E 61#define AMC6821_REG_CONF1 0x00 62#define AMC6821_REG_CONF2 0x01 63#define AMC6821_REG_CONF3 0x3F 64#define AMC6821_REG_CONF4 0x04 65#define AMC6821_REG_STAT1 0x02 66#define AMC6821_REG_STAT2 0x03 67#define AMC6821_REG_TDATA_LOW 0x08 68#define AMC6821_REG_TDATA_HI 0x09 69#define AMC6821_REG_LTEMP_HI 0x0A 70#define AMC6821_REG_RTEMP_HI 0x0B 71#define AMC6821_REG_LTEMP_LIMIT_MIN 0x15 72#define AMC6821_REG_LTEMP_LIMIT_MAX 0x14 73#define AMC6821_REG_RTEMP_LIMIT_MIN 0x19 74#define AMC6821_REG_RTEMP_LIMIT_MAX 0x18 75#define AMC6821_REG_LTEMP_CRIT 0x1B 76#define AMC6821_REG_RTEMP_CRIT 0x1D 77#define AMC6821_REG_PSV_TEMP 0x1C 78#define AMC6821_REG_DCY 0x22 79#define AMC6821_REG_LTEMP_FAN_CTRL 0x24 80#define AMC6821_REG_RTEMP_FAN_CTRL 0x25 81#define AMC6821_REG_DCY_LOW_TEMP 0x21 82 83#define AMC6821_REG_TACH_LLIMITL 0x10 84#define AMC6821_REG_TACH_LLIMITH 0x11 85#define AMC6821_REG_TACH_HLIMITL 0x12 86#define AMC6821_REG_TACH_HLIMITH 0x13 87 88#define AMC6821_CONF1_START 0x01 89#define AMC6821_CONF1_FAN_INT_EN 0x02 90#define AMC6821_CONF1_FANIE 0x04 91#define AMC6821_CONF1_PWMINV 0x08 92#define AMC6821_CONF1_FAN_FAULT_EN 0x10 93#define AMC6821_CONF1_FDRC0 0x20 94#define AMC6821_CONF1_FDRC1 0x40 95#define AMC6821_CONF1_THERMOVIE 0x80 96 97#define AMC6821_CONF2_PWM_EN 0x01 98#define AMC6821_CONF2_TACH_MODE 0x02 99#define AMC6821_CONF2_TACH_EN 0x04 100#define AMC6821_CONF2_RTFIE 0x08 101#define AMC6821_CONF2_LTOIE 0x10 102#define AMC6821_CONF2_RTOIE 0x20 103#define AMC6821_CONF2_PSVIE 0x40 104#define AMC6821_CONF2_RST 0x80 105 106#define AMC6821_CONF3_THERM_FAN_EN 0x80 107#define AMC6821_CONF3_REV_MASK 0x0F 108 109#define AMC6821_CONF4_OVREN 0x10 110#define AMC6821_CONF4_TACH_FAST 0x20 111#define AMC6821_CONF4_PSPR 0x40 112#define AMC6821_CONF4_MODE 0x80 113 114#define AMC6821_STAT1_RPM_ALARM 0x01 115#define AMC6821_STAT1_FANS 0x02 116#define AMC6821_STAT1_RTH 0x04 117#define AMC6821_STAT1_RTL 0x08 118#define AMC6821_STAT1_R_THERM 0x10 119#define AMC6821_STAT1_RTF 0x20 120#define AMC6821_STAT1_LTH 0x40 121#define AMC6821_STAT1_LTL 0x80 122 123#define AMC6821_STAT2_RTC 0x08 124#define AMC6821_STAT2_LTC 0x10 125#define AMC6821_STAT2_LPSV 0x20 126#define AMC6821_STAT2_L_THERM 0x40 127#define AMC6821_STAT2_THERM_IN 0x80 128 129enum {IDX_TEMP1_INPUT = 0, IDX_TEMP1_MIN, IDX_TEMP1_MAX, 130 IDX_TEMP1_CRIT, IDX_TEMP2_INPUT, IDX_TEMP2_MIN, 131 IDX_TEMP2_MAX, IDX_TEMP2_CRIT, 132 TEMP_IDX_LEN, }; 133 134static const u8 temp_reg[] = {AMC6821_REG_LTEMP_HI, 135 AMC6821_REG_LTEMP_LIMIT_MIN, 136 AMC6821_REG_LTEMP_LIMIT_MAX, 137 AMC6821_REG_LTEMP_CRIT, 138 AMC6821_REG_RTEMP_HI, 139 AMC6821_REG_RTEMP_LIMIT_MIN, 140 AMC6821_REG_RTEMP_LIMIT_MAX, 141 AMC6821_REG_RTEMP_CRIT, }; 142 143enum {IDX_FAN1_INPUT = 0, IDX_FAN1_MIN, IDX_FAN1_MAX, 144 FAN1_IDX_LEN, }; 145 146static const u8 fan_reg_low[] = {AMC6821_REG_TDATA_LOW, 147 AMC6821_REG_TACH_LLIMITL, 148 AMC6821_REG_TACH_HLIMITL, }; 149 150 151static const u8 fan_reg_hi[] = {AMC6821_REG_TDATA_HI, 152 AMC6821_REG_TACH_LLIMITH, 153 AMC6821_REG_TACH_HLIMITH, }; 154 155static int amc6821_probe( 156 struct i2c_client *client, 157 const struct i2c_device_id *id); 158static int amc6821_detect( 159 struct i2c_client *client, 160 struct i2c_board_info *info); 161static int amc6821_init_client(struct i2c_client *client); 162static int amc6821_remove(struct i2c_client *client); 163static struct amc6821_data *amc6821_update_device(struct device *dev); 164 165/* 166 * Driver data (common to all clients) 167 */ 168 169static const struct i2c_device_id amc6821_id[] = { 170 { "amc6821", amc6821 }, 171 { } 172}; 173 174MODULE_DEVICE_TABLE(i2c, amc6821_id); 175 176static struct i2c_driver amc6821_driver = { 177 .class = I2C_CLASS_HWMON, 178 .driver = { 179 .name = "amc6821", 180 }, 181 .probe = amc6821_probe, 182 .remove = amc6821_remove, 183 .id_table = amc6821_id, 184 .detect = amc6821_detect, 185 .address_list = normal_i2c, 186}; 187 188 189/* 190 * Client data (each client gets its own) 191 */ 192 193struct amc6821_data { 194 struct device *hwmon_dev; 195 struct mutex update_lock; 196 char valid; /* zero until following fields are valid */ 197 unsigned long last_updated; /* in jiffies */ 198 199 /* register values */ 200 int temp[TEMP_IDX_LEN]; 201 202 u16 fan[FAN1_IDX_LEN]; 203 u8 fan1_div; 204 205 u8 pwm1; 206 u8 temp1_auto_point_temp[3]; 207 u8 temp2_auto_point_temp[3]; 208 u8 pwm1_auto_point_pwm[3]; 209 u8 pwm1_enable; 210 u8 pwm1_auto_channels_temp; 211 212 u8 stat1; 213 u8 stat2; 214}; 215 216 217static ssize_t get_temp( 218 struct device *dev, 219 struct device_attribute *devattr, 220 char *buf) 221{ 222 struct amc6821_data *data = amc6821_update_device(dev); 223 int ix = to_sensor_dev_attr(devattr)->index; 224 225 return sprintf(buf, "%d\n", data->temp[ix] * 1000); 226} 227 228 229 230static ssize_t set_temp( 231 struct device *dev, 232 struct device_attribute *attr, 233 const char *buf, 234 size_t count) 235{ 236 struct i2c_client *client = to_i2c_client(dev); 237 struct amc6821_data *data = i2c_get_clientdata(client); 238 int ix = to_sensor_dev_attr(attr)->index; 239 long val; 240 241 int ret = strict_strtol(buf, 10, &val); 242 if (ret) 243 return ret; 244 val = SENSORS_LIMIT(val / 1000, -128, 127); 245 246 mutex_lock(&data->update_lock); 247 data->temp[ix] = val; 248 if (i2c_smbus_write_byte_data(client, temp_reg[ix], data->temp[ix])) { 249 dev_err(&client->dev, "Register write error, aborting.\n"); 250 count = -EIO; 251 } 252 mutex_unlock(&data->update_lock); 253 return count; 254} 255 256 257 258 259static ssize_t get_temp_alarm( 260 struct device *dev, 261 struct device_attribute *devattr, 262 char *buf) 263{ 264 struct amc6821_data *data = amc6821_update_device(dev); 265 int ix = to_sensor_dev_attr(devattr)->index; 266 u8 flag; 267 268 switch (ix) { 269 case IDX_TEMP1_MIN: 270 flag = data->stat1 & AMC6821_STAT1_LTL; 271 break; 272 case IDX_TEMP1_MAX: 273 flag = data->stat1 & AMC6821_STAT1_LTH; 274 break; 275 case IDX_TEMP1_CRIT: 276 flag = data->stat2 & AMC6821_STAT2_LTC; 277 break; 278 case IDX_TEMP2_MIN: 279 flag = data->stat1 & AMC6821_STAT1_RTL; 280 break; 281 case IDX_TEMP2_MAX: 282 flag = data->stat1 & AMC6821_STAT1_RTH; 283 break; 284 case IDX_TEMP2_CRIT: 285 flag = data->stat2 & AMC6821_STAT2_RTC; 286 break; 287 default: 288 dev_dbg(dev, "Unknown attr->index (%d).\n", ix); 289 return -EINVAL; 290 } 291 if (flag) 292 return sprintf(buf, "1"); 293 else 294 return sprintf(buf, "0"); 295} 296 297 298 299 300static ssize_t get_temp2_fault( 301 struct device *dev, 302 struct device_attribute *devattr, 303 char *buf) 304{ 305 struct amc6821_data *data = amc6821_update_device(dev); 306 if (data->stat1 & AMC6821_STAT1_RTF) 307 return sprintf(buf, "1"); 308 else 309 return sprintf(buf, "0"); 310} 311 312static ssize_t get_pwm1( 313 struct device *dev, 314 struct device_attribute *devattr, 315 char *buf) 316{ 317 struct amc6821_data *data = amc6821_update_device(dev); 318 return sprintf(buf, "%d\n", data->pwm1); 319} 320 321static ssize_t set_pwm1( 322 struct device *dev, 323 struct device_attribute *devattr, 324 const char *buf, 325 size_t count) 326{ 327 struct i2c_client *client = to_i2c_client(dev); 328 struct amc6821_data *data = i2c_get_clientdata(client); 329 long val; 330 int ret = strict_strtol(buf, 10, &val); 331 if (ret) 332 return ret; 333 334 mutex_lock(&data->update_lock); 335 data->pwm1 = SENSORS_LIMIT(val , 0, 255); 336 i2c_smbus_write_byte_data(client, AMC6821_REG_DCY, data->pwm1); 337 mutex_unlock(&data->update_lock); 338 return count; 339} 340 341static ssize_t get_pwm1_enable( 342 struct device *dev, 343 struct device_attribute *devattr, 344 char *buf) 345{ 346 struct amc6821_data *data = amc6821_update_device(dev); 347 return sprintf(buf, "%d\n", data->pwm1_enable); 348} 349 350static ssize_t set_pwm1_enable( 351 struct device *dev, 352 struct device_attribute *attr, 353 const char *buf, 354 size_t count) 355{ 356 struct i2c_client *client = to_i2c_client(dev); 357 struct amc6821_data *data = i2c_get_clientdata(client); 358 long val; 359 int config = strict_strtol(buf, 10, &val); 360 if (config) 361 return config; 362 363 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1); 364 if (config < 0) { 365 dev_err(&client->dev, 366 "Error reading configuration register, aborting.\n"); 367 return -EIO; 368 } 369 370 switch (val) { 371 case 1: 372 config &= ~AMC6821_CONF1_FDRC0; 373 config &= ~AMC6821_CONF1_FDRC1; 374 break; 375 case 2: 376 config &= ~AMC6821_CONF1_FDRC0; 377 config |= AMC6821_CONF1_FDRC1; 378 break; 379 case 3: 380 config |= AMC6821_CONF1_FDRC0; 381 config |= AMC6821_CONF1_FDRC1; 382 break; 383 default: 384 return -EINVAL; 385 } 386 mutex_lock(&data->update_lock); 387 if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF1, config)) { 388 dev_err(&client->dev, 389 "Configuration register write error, aborting.\n"); 390 count = -EIO; 391 } 392 mutex_unlock(&data->update_lock); 393 return count; 394} 395 396 397static ssize_t get_pwm1_auto_channels_temp( 398 struct device *dev, 399 struct device_attribute *devattr, 400 char *buf) 401{ 402 struct amc6821_data *data = amc6821_update_device(dev); 403 return sprintf(buf, "%d\n", data->pwm1_auto_channels_temp); 404} 405 406 407static ssize_t get_temp_auto_point_temp( 408 struct device *dev, 409 struct device_attribute *devattr, 410 char *buf) 411{ 412 int ix = to_sensor_dev_attr_2(devattr)->index; 413 int nr = to_sensor_dev_attr_2(devattr)->nr; 414 struct amc6821_data *data = amc6821_update_device(dev); 415 switch (nr) { 416 case 1: 417 return sprintf(buf, "%d\n", 418 data->temp1_auto_point_temp[ix] * 1000); 419 break; 420 case 2: 421 return sprintf(buf, "%d\n", 422 data->temp2_auto_point_temp[ix] * 1000); 423 break; 424 default: 425 dev_dbg(dev, "Unknown attr->nr (%d).\n", nr); 426 return -EINVAL; 427 } 428} 429 430 431static ssize_t get_pwm1_auto_point_pwm( 432 struct device *dev, 433 struct device_attribute *devattr, 434 char *buf) 435{ 436 int ix = to_sensor_dev_attr(devattr)->index; 437 struct amc6821_data *data = amc6821_update_device(dev); 438 return sprintf(buf, "%d\n", data->pwm1_auto_point_pwm[ix]); 439} 440 441 442static inline ssize_t set_slope_register(struct i2c_client *client, 443 u8 reg, 444 u8 dpwm, 445 u8 *ptemp) 446{ 447 int dt; 448 u8 tmp; 449 450 dt = ptemp[2]-ptemp[1]; 451 for (tmp = 4; tmp > 0; tmp--) { 452 if (dt * (0x20 >> tmp) >= dpwm) 453 break; 454 } 455 tmp |= (ptemp[1] & 0x7C) << 1; 456 if (i2c_smbus_write_byte_data(client, 457 reg, tmp)) { 458 dev_err(&client->dev, "Register write error, aborting.\n"); 459 return -EIO; 460 } 461 return 0; 462} 463 464 465 466static ssize_t set_temp_auto_point_temp( 467 struct device *dev, 468 struct device_attribute *attr, 469 const char *buf, 470 size_t count) 471{ 472 struct i2c_client *client = to_i2c_client(dev); 473 struct amc6821_data *data = amc6821_update_device(dev); 474 int ix = to_sensor_dev_attr_2(attr)->index; 475 int nr = to_sensor_dev_attr_2(attr)->nr; 476 u8 *ptemp; 477 u8 reg; 478 int dpwm; 479 long val; 480 int ret = strict_strtol(buf, 10, &val); 481 if (ret) 482 return ret; 483 484 switch (nr) { 485 case 1: 486 ptemp = data->temp1_auto_point_temp; 487 reg = AMC6821_REG_LTEMP_FAN_CTRL; 488 break; 489 case 2: 490 ptemp = data->temp2_auto_point_temp; 491 reg = AMC6821_REG_RTEMP_FAN_CTRL; 492 break; 493 default: 494 dev_dbg(dev, "Unknown attr->nr (%d).\n", nr); 495 return -EINVAL; 496 } 497 498 data->valid = 0; 499 mutex_lock(&data->update_lock); 500 switch (ix) { 501 case 0: 502 ptemp[0] = SENSORS_LIMIT(val / 1000, 0, 503 data->temp1_auto_point_temp[1]); 504 ptemp[0] = SENSORS_LIMIT(ptemp[0], 0, 505 data->temp2_auto_point_temp[1]); 506 ptemp[0] = SENSORS_LIMIT(ptemp[0], 0, 63); 507 if (i2c_smbus_write_byte_data( 508 client, 509 AMC6821_REG_PSV_TEMP, 510 ptemp[0])) { 511 dev_err(&client->dev, 512 "Register write error, aborting.\n"); 513 count = -EIO; 514 } 515 goto EXIT; 516 break; 517 case 1: 518 ptemp[1] = SENSORS_LIMIT( 519 val / 1000, 520 (ptemp[0] & 0x7C) + 4, 521 124); 522 ptemp[1] &= 0x7C; 523 ptemp[2] = SENSORS_LIMIT( 524 ptemp[2], ptemp[1] + 1, 525 255); 526 break; 527 case 2: 528 ptemp[2] = SENSORS_LIMIT( 529 val / 1000, 530 ptemp[1]+1, 531 255); 532 break; 533 default: 534 dev_dbg(dev, "Unknown attr->index (%d).\n", ix); 535 count = -EINVAL; 536 goto EXIT; 537 } 538 dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1]; 539 if (set_slope_register(client, reg, dpwm, ptemp)) 540 count = -EIO; 541 542EXIT: 543 mutex_unlock(&data->update_lock); 544 return count; 545} 546 547 548 549static ssize_t set_pwm1_auto_point_pwm( 550 struct device *dev, 551 struct device_attribute *attr, 552 const char *buf, 553 size_t count) 554{ 555 struct i2c_client *client = to_i2c_client(dev); 556 struct amc6821_data *data = i2c_get_clientdata(client); 557 int dpwm; 558 long val; 559 int ret = strict_strtol(buf, 10, &val); 560 if (ret) 561 return ret; 562 563 mutex_lock(&data->update_lock); 564 data->pwm1_auto_point_pwm[1] = SENSORS_LIMIT(val, 0, 254); 565 if (i2c_smbus_write_byte_data(client, AMC6821_REG_DCY_LOW_TEMP, 566 data->pwm1_auto_point_pwm[1])) { 567 dev_err(&client->dev, "Register write error, aborting.\n"); 568 count = -EIO; 569 goto EXIT; 570 } 571 dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1]; 572 if (set_slope_register(client, AMC6821_REG_LTEMP_FAN_CTRL, dpwm, 573 data->temp1_auto_point_temp)) { 574 count = -EIO; 575 goto EXIT; 576 } 577 if (set_slope_register(client, AMC6821_REG_RTEMP_FAN_CTRL, dpwm, 578 data->temp2_auto_point_temp)) { 579 count = -EIO; 580 goto EXIT; 581 } 582 583EXIT: 584 data->valid = 0; 585 mutex_unlock(&data->update_lock); 586 return count; 587} 588 589static ssize_t get_fan( 590 struct device *dev, 591 struct device_attribute *devattr, 592 char *buf) 593{ 594 struct amc6821_data *data = amc6821_update_device(dev); 595 int ix = to_sensor_dev_attr(devattr)->index; 596 if (0 == data->fan[ix]) 597 return sprintf(buf, "0"); 598 return sprintf(buf, "%d\n", (int)(6000000 / data->fan[ix])); 599} 600 601 602 603static ssize_t get_fan1_fault( 604 struct device *dev, 605 struct device_attribute *devattr, 606 char *buf) 607{ 608 struct amc6821_data *data = amc6821_update_device(dev); 609 if (data->stat1 & AMC6821_STAT1_FANS) 610 return sprintf(buf, "1"); 611 else 612 return sprintf(buf, "0"); 613} 614 615 616 617static ssize_t set_fan( 618 struct device *dev, 619 struct device_attribute *attr, 620 const char *buf, size_t count) 621{ 622 struct i2c_client *client = to_i2c_client(dev); 623 struct amc6821_data *data = i2c_get_clientdata(client); 624 long val; 625 int ix = to_sensor_dev_attr(attr)->index; 626 int ret = strict_strtol(buf, 10, &val); 627 if (ret) 628 return ret; 629 val = 1 > val ? 0xFFFF : 6000000/val; 630 631 mutex_lock(&data->update_lock); 632 data->fan[ix] = (u16) SENSORS_LIMIT(val, 1, 0xFFFF); 633 if (i2c_smbus_write_byte_data(client, fan_reg_low[ix], 634 data->fan[ix] & 0xFF)) { 635 dev_err(&client->dev, "Register write error, aborting.\n"); 636 count = -EIO; 637 goto EXIT; 638 } 639 if (i2c_smbus_write_byte_data(client, 640 fan_reg_hi[ix], data->fan[ix] >> 8)) { 641 dev_err(&client->dev, "Register write error, aborting.\n"); 642 count = -EIO; 643 } 644EXIT: 645 mutex_unlock(&data->update_lock); 646 return count; 647} 648 649 650 651static ssize_t get_fan1_div( 652 struct device *dev, 653 struct device_attribute *devattr, 654 char *buf) 655{ 656 struct amc6821_data *data = amc6821_update_device(dev); 657 return sprintf(buf, "%d\n", data->fan1_div); 658} 659 660static ssize_t set_fan1_div( 661 struct device *dev, 662 struct device_attribute *attr, 663 const char *buf, size_t count) 664{ 665 struct i2c_client *client = to_i2c_client(dev); 666 struct amc6821_data *data = i2c_get_clientdata(client); 667 long val; 668 int config = strict_strtol(buf, 10, &val); 669 if (config) 670 return config; 671 672 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4); 673 if (config < 0) { 674 dev_err(&client->dev, 675 "Error reading configuration register, aborting.\n"); 676 return -EIO; 677 } 678 mutex_lock(&data->update_lock); 679 switch (val) { 680 case 2: 681 config &= ~AMC6821_CONF4_PSPR; 682 data->fan1_div = 2; 683 break; 684 case 4: 685 config |= AMC6821_CONF4_PSPR; 686 data->fan1_div = 4; 687 break; 688 default: 689 count = -EINVAL; 690 goto EXIT; 691 } 692 if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4, config)) { 693 dev_err(&client->dev, 694 "Configuration register write error, aborting.\n"); 695 count = -EIO; 696 } 697EXIT: 698 mutex_unlock(&data->update_lock); 699 return count; 700} 701 702 703 704static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, 705 get_temp, NULL, IDX_TEMP1_INPUT); 706static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO | S_IWUSR, get_temp, 707 set_temp, IDX_TEMP1_MIN); 708static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, get_temp, 709 set_temp, IDX_TEMP1_MAX); 710static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR, get_temp, 711 set_temp, IDX_TEMP1_CRIT); 712static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, 713 get_temp_alarm, NULL, IDX_TEMP1_MIN); 714static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, 715 get_temp_alarm, NULL, IDX_TEMP1_MAX); 716static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, 717 get_temp_alarm, NULL, IDX_TEMP1_CRIT); 718static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO | S_IWUSR, 719 get_temp, NULL, IDX_TEMP2_INPUT); 720static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO | S_IWUSR, get_temp, 721 set_temp, IDX_TEMP2_MIN); 722static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR, get_temp, 723 set_temp, IDX_TEMP2_MAX); 724static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO | S_IWUSR, get_temp, 725 set_temp, IDX_TEMP2_CRIT); 726static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, 727 get_temp2_fault, NULL, 0); 728static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, 729 get_temp_alarm, NULL, IDX_TEMP2_MIN); 730static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, 731 get_temp_alarm, NULL, IDX_TEMP2_MAX); 732static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, 733 get_temp_alarm, NULL, IDX_TEMP2_CRIT); 734static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan, NULL, IDX_FAN1_INPUT); 735static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR, 736 get_fan, set_fan, IDX_FAN1_MIN); 737static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO | S_IWUSR, 738 get_fan, set_fan, IDX_FAN1_MAX); 739static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, get_fan1_fault, NULL, 0); 740static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, 741 get_fan1_div, set_fan1_div, 0); 742 743static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, get_pwm1, set_pwm1, 0); 744static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 745 get_pwm1_enable, set_pwm1_enable, 0); 746static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IRUGO, 747 get_pwm1_auto_point_pwm, NULL, 0); 748static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO, 749 get_pwm1_auto_point_pwm, set_pwm1_auto_point_pwm, 1); 750static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IRUGO, 751 get_pwm1_auto_point_pwm, NULL, 2); 752static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IRUGO, 753 get_pwm1_auto_channels_temp, NULL, 0); 754static SENSOR_DEVICE_ATTR_2(temp1_auto_point1_temp, S_IRUGO, 755 get_temp_auto_point_temp, NULL, 1, 0); 756static SENSOR_DEVICE_ATTR_2(temp1_auto_point2_temp, S_IWUSR | S_IRUGO, 757 get_temp_auto_point_temp, set_temp_auto_point_temp, 1, 1); 758static SENSOR_DEVICE_ATTR_2(temp1_auto_point3_temp, S_IWUSR | S_IRUGO, 759 get_temp_auto_point_temp, set_temp_auto_point_temp, 1, 2); 760 761static SENSOR_DEVICE_ATTR_2(temp2_auto_point1_temp, S_IWUSR | S_IRUGO, 762 get_temp_auto_point_temp, set_temp_auto_point_temp, 2, 0); 763static SENSOR_DEVICE_ATTR_2(temp2_auto_point2_temp, S_IWUSR | S_IRUGO, 764 get_temp_auto_point_temp, set_temp_auto_point_temp, 2, 1); 765static SENSOR_DEVICE_ATTR_2(temp2_auto_point3_temp, S_IWUSR | S_IRUGO, 766 get_temp_auto_point_temp, set_temp_auto_point_temp, 2, 2); 767 768 769 770static struct attribute *amc6821_attrs[] = { 771 &sensor_dev_attr_temp1_input.dev_attr.attr, 772 &sensor_dev_attr_temp1_min.dev_attr.attr, 773 &sensor_dev_attr_temp1_max.dev_attr.attr, 774 &sensor_dev_attr_temp1_crit.dev_attr.attr, 775 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, 776 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 777 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, 778 &sensor_dev_attr_temp2_input.dev_attr.attr, 779 &sensor_dev_attr_temp2_min.dev_attr.attr, 780 &sensor_dev_attr_temp2_max.dev_attr.attr, 781 &sensor_dev_attr_temp2_crit.dev_attr.attr, 782 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, 783 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 784 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 785 &sensor_dev_attr_temp2_fault.dev_attr.attr, 786 &sensor_dev_attr_fan1_input.dev_attr.attr, 787 &sensor_dev_attr_fan1_min.dev_attr.attr, 788 &sensor_dev_attr_fan1_max.dev_attr.attr, 789 &sensor_dev_attr_fan1_fault.dev_attr.attr, 790 &sensor_dev_attr_fan1_div.dev_attr.attr, 791 &sensor_dev_attr_pwm1.dev_attr.attr, 792 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 793 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, 794 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 795 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 796 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 797 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr, 798 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr, 799 &sensor_dev_attr_temp1_auto_point3_temp.dev_attr.attr, 800 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr, 801 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr, 802 &sensor_dev_attr_temp2_auto_point3_temp.dev_attr.attr, 803 NULL 804}; 805 806static struct attribute_group amc6821_attr_grp = { 807 .attrs = amc6821_attrs, 808}; 809 810 811 812/* Return 0 if detection is successful, -ENODEV otherwise */ 813static int amc6821_detect( 814 struct i2c_client *client, 815 struct i2c_board_info *info) 816{ 817 struct i2c_adapter *adapter = client->adapter; 818 int address = client->addr; 819 int dev_id, comp_id; 820 821 dev_dbg(&adapter->dev, "amc6821_detect called.\n"); 822 823 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { 824 dev_dbg(&adapter->dev, 825 "amc6821: I2C bus doesn't support byte mode, " 826 "skipping.\n"); 827 return -ENODEV; 828 } 829 830 dev_id = i2c_smbus_read_byte_data(client, AMC6821_REG_DEV_ID); 831 comp_id = i2c_smbus_read_byte_data(client, AMC6821_REG_COMP_ID); 832 if (dev_id != 0x21 || comp_id != 0x49) { 833 dev_dbg(&adapter->dev, 834 "amc6821: detection failed at 0x%02x.\n", 835 address); 836 return -ENODEV; 837 } 838 839 /* Bit 7 of the address register is ignored, so we can check the 840 ID registers again */ 841 dev_id = i2c_smbus_read_byte_data(client, 0x80 | AMC6821_REG_DEV_ID); 842 comp_id = i2c_smbus_read_byte_data(client, 0x80 | AMC6821_REG_COMP_ID); 843 if (dev_id != 0x21 || comp_id != 0x49) { 844 dev_dbg(&adapter->dev, 845 "amc6821: detection failed at 0x%02x.\n", 846 address); 847 return -ENODEV; 848 } 849 850 dev_info(&adapter->dev, "amc6821: chip found at 0x%02x.\n", address); 851 strlcpy(info->type, "amc6821", I2C_NAME_SIZE); 852 853 return 0; 854} 855 856static int amc6821_probe( 857 struct i2c_client *client, 858 const struct i2c_device_id *id) 859{ 860 struct amc6821_data *data; 861 int err; 862 863 data = kzalloc(sizeof(struct amc6821_data), GFP_KERNEL); 864 if (!data) { 865 dev_err(&client->dev, "out of memory.\n"); 866 return -ENOMEM; 867 } 868 869 870 i2c_set_clientdata(client, data); 871 mutex_init(&data->update_lock); 872 873 /* 874 * Initialize the amc6821 chip 875 */ 876 err = amc6821_init_client(client); 877 if (err) 878 goto err_free; 879 880 err = sysfs_create_group(&client->dev.kobj, &amc6821_attr_grp); 881 if (err) 882 goto err_free; 883 884 data->hwmon_dev = hwmon_device_register(&client->dev); 885 if (!IS_ERR(data->hwmon_dev)) 886 return 0; 887 888 err = PTR_ERR(data->hwmon_dev); 889 dev_err(&client->dev, "error registering hwmon device.\n"); 890 sysfs_remove_group(&client->dev.kobj, &amc6821_attr_grp); 891err_free: 892 kfree(data); 893 return err; 894} 895 896static int amc6821_remove(struct i2c_client *client) 897{ 898 struct amc6821_data *data = i2c_get_clientdata(client); 899 900 hwmon_device_unregister(data->hwmon_dev); 901 sysfs_remove_group(&client->dev.kobj, &amc6821_attr_grp); 902 903 kfree(data); 904 905 return 0; 906} 907 908 909static int amc6821_init_client(struct i2c_client *client) 910{ 911 int config; 912 int err = -EIO; 913 914 if (init) { 915 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4); 916 917 if (config < 0) { 918 dev_err(&client->dev, 919 "Error reading configuration register, aborting.\n"); 920 return err; 921 } 922 923 config |= AMC6821_CONF4_MODE; 924 925 if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4, 926 config)) { 927 dev_err(&client->dev, 928 "Configuration register write error, aborting.\n"); 929 return err; 930 } 931 932 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF3); 933 934 if (config < 0) { 935 dev_err(&client->dev, 936 "Error reading configuration register, aborting.\n"); 937 return err; 938 } 939 940 dev_info(&client->dev, "Revision %d\n", config & 0x0f); 941 942 config &= ~AMC6821_CONF3_THERM_FAN_EN; 943 944 if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF3, 945 config)) { 946 dev_err(&client->dev, 947 "Configuration register write error, aborting.\n"); 948 return err; 949 } 950 951 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF2); 952 953 if (config < 0) { 954 dev_err(&client->dev, 955 "Error reading configuration register, aborting.\n"); 956 return err; 957 } 958 959 config &= ~AMC6821_CONF2_RTFIE; 960 config &= ~AMC6821_CONF2_LTOIE; 961 config &= ~AMC6821_CONF2_RTOIE; 962 if (i2c_smbus_write_byte_data(client, 963 AMC6821_REG_CONF2, config)) { 964 dev_err(&client->dev, 965 "Configuration register write error, aborting.\n"); 966 return err; 967 } 968 969 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1); 970 971 if (config < 0) { 972 dev_err(&client->dev, 973 "Error reading configuration register, aborting.\n"); 974 return err; 975 } 976 977 config &= ~AMC6821_CONF1_THERMOVIE; 978 config &= ~AMC6821_CONF1_FANIE; 979 config |= AMC6821_CONF1_START; 980 if (pwminv) 981 config |= AMC6821_CONF1_PWMINV; 982 else 983 config &= ~AMC6821_CONF1_PWMINV; 984 985 if (i2c_smbus_write_byte_data( 986 client, AMC6821_REG_CONF1, config)) { 987 dev_err(&client->dev, 988 "Configuration register write error, aborting.\n"); 989 return err; 990 } 991 } 992 return 0; 993} 994 995 996static struct amc6821_data *amc6821_update_device(struct device *dev) 997{ 998 struct i2c_client *client = to_i2c_client(dev); 999 struct amc6821_data *data = i2c_get_clientdata(client); 1000 int timeout = HZ; 1001 u8 reg; 1002 int i; 1003 1004 mutex_lock(&data->update_lock); 1005 1006 if (time_after(jiffies, data->last_updated + timeout) || 1007 !data->valid) { 1008 1009 for (i = 0; i < TEMP_IDX_LEN; i++) 1010 data->temp[i] = i2c_smbus_read_byte_data(client, 1011 temp_reg[i]); 1012 1013 data->stat1 = i2c_smbus_read_byte_data(client, 1014 AMC6821_REG_STAT1); 1015 data->stat2 = i2c_smbus_read_byte_data(client, 1016 AMC6821_REG_STAT2); 1017 1018 data->pwm1 = i2c_smbus_read_byte_data(client, 1019 AMC6821_REG_DCY); 1020 for (i = 0; i < FAN1_IDX_LEN; i++) { 1021 data->fan[i] = i2c_smbus_read_byte_data( 1022 client, 1023 fan_reg_low[i]); 1024 data->fan[i] += i2c_smbus_read_byte_data( 1025 client, 1026 fan_reg_hi[i]) << 8; 1027 } 1028 data->fan1_div = i2c_smbus_read_byte_data(client, 1029 AMC6821_REG_CONF4); 1030 data->fan1_div = data->fan1_div & AMC6821_CONF4_PSPR ? 4 : 2; 1031 1032 data->pwm1_auto_point_pwm[0] = 0; 1033 data->pwm1_auto_point_pwm[2] = 255; 1034 data->pwm1_auto_point_pwm[1] = i2c_smbus_read_byte_data(client, 1035 AMC6821_REG_DCY_LOW_TEMP); 1036 1037 data->temp1_auto_point_temp[0] = 1038 i2c_smbus_read_byte_data(client, 1039 AMC6821_REG_PSV_TEMP); 1040 data->temp2_auto_point_temp[0] = 1041 data->temp1_auto_point_temp[0]; 1042 reg = i2c_smbus_read_byte_data(client, 1043 AMC6821_REG_LTEMP_FAN_CTRL); 1044 data->temp1_auto_point_temp[1] = (reg & 0xF8) >> 1; 1045 reg &= 0x07; 1046 reg = 0x20 >> reg; 1047 if (reg > 0) 1048 data->temp1_auto_point_temp[2] = 1049 data->temp1_auto_point_temp[1] + 1050 (data->pwm1_auto_point_pwm[2] - 1051 data->pwm1_auto_point_pwm[1]) / reg; 1052 else 1053 data->temp1_auto_point_temp[2] = 255; 1054 1055 reg = i2c_smbus_read_byte_data(client, 1056 AMC6821_REG_RTEMP_FAN_CTRL); 1057 data->temp2_auto_point_temp[1] = (reg & 0xF8) >> 1; 1058 reg &= 0x07; 1059 reg = 0x20 >> reg; 1060 if (reg > 0) 1061 data->temp2_auto_point_temp[2] = 1062 data->temp2_auto_point_temp[1] + 1063 (data->pwm1_auto_point_pwm[2] - 1064 data->pwm1_auto_point_pwm[1]) / reg; 1065 else 1066 data->temp2_auto_point_temp[2] = 255; 1067 1068 reg = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1); 1069 reg = (reg >> 5) & 0x3; 1070 switch (reg) { 1071 case 0: /*open loop: software sets pwm1*/ 1072 data->pwm1_auto_channels_temp = 0; 1073 data->pwm1_enable = 1; 1074 break; 1075 case 2: /*closed loop: remote T (temp2)*/ 1076 data->pwm1_auto_channels_temp = 2; 1077 data->pwm1_enable = 2; 1078 break; 1079 case 3: /*closed loop: local and remote T (temp2)*/ 1080 data->pwm1_auto_channels_temp = 3; 1081 data->pwm1_enable = 3; 1082 break; 1083 case 1: /*semi-open loop: software sets rpm, chip controls pwm1, 1084 *currently not implemented 1085 */ 1086 data->pwm1_auto_channels_temp = 0; 1087 data->pwm1_enable = 0; 1088 break; 1089 } 1090 1091 data->last_updated = jiffies; 1092 data->valid = 1; 1093 } 1094 mutex_unlock(&data->update_lock); 1095 return data; 1096} 1097 1098 1099static int __init amc6821_init(void) 1100{ 1101 return i2c_add_driver(&amc6821_driver); 1102} 1103 1104static void __exit amc6821_exit(void) 1105{ 1106 i2c_del_driver(&amc6821_driver); 1107} 1108 1109module_init(amc6821_init); 1110module_exit(amc6821_exit); 1111 1112 1113MODULE_LICENSE("GPL"); 1114MODULE_AUTHOR("T. Mertelj <tomaz.mertelj@guest.arnes.si>"); 1115MODULE_DESCRIPTION("Texas Instruments amc6821 hwmon driver"); 1116