1 /* 2 * w83l786ng.c - Linux kernel driver for hardware monitoring 3 * Copyright (c) 2007 Kevin Lo <kevlo@kevlo.org> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation - version 2. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 17 * 02110-1301 USA. 18 */ 19 20 /* 21 * Supports following chips: 22 * 23 * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA 24 * w83l786ng 3 2 2 2 0x7b 0x5ca3 yes no 25 */ 26 27 #include <linux/module.h> 28 #include <linux/init.h> 29 #include <linux/slab.h> 30 #include <linux/i2c.h> 31 #include <linux/hwmon.h> 32 #include <linux/hwmon-vid.h> 33 #include <linux/hwmon-sysfs.h> 34 #include <linux/err.h> 35 #include <linux/mutex.h> 36 #include <linux/jiffies.h> 37 38 /* Addresses to scan */ 39 static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END }; 40 41 /* Insmod parameters */ 42 43 static bool reset; 44 module_param(reset, bool, 0); 45 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended"); 46 47 #define W83L786NG_REG_IN_MIN(nr) (0x2C + (nr) * 2) 48 #define W83L786NG_REG_IN_MAX(nr) (0x2B + (nr) * 2) 49 #define W83L786NG_REG_IN(nr) ((nr) + 0x20) 50 51 #define W83L786NG_REG_FAN(nr) ((nr) + 0x28) 52 #define W83L786NG_REG_FAN_MIN(nr) ((nr) + 0x3B) 53 54 #define W83L786NG_REG_CONFIG 0x40 55 #define W83L786NG_REG_ALARM1 0x41 56 #define W83L786NG_REG_ALARM2 0x42 57 #define W83L786NG_REG_GPIO_EN 0x47 58 #define W83L786NG_REG_MAN_ID2 0x4C 59 #define W83L786NG_REG_MAN_ID1 0x4D 60 #define W83L786NG_REG_CHIP_ID 0x4E 61 62 #define W83L786NG_REG_DIODE 0x53 63 #define W83L786NG_REG_FAN_DIV 0x54 64 #define W83L786NG_REG_FAN_CFG 0x80 65 66 #define W83L786NG_REG_TOLERANCE 0x8D 67 68 static const u8 W83L786NG_REG_TEMP[2][3] = { 69 { 0x25, /* TEMP 0 in DataSheet */ 70 0x35, /* TEMP 0 Over in DataSheet */ 71 0x36 }, /* TEMP 0 Hyst in DataSheet */ 72 { 0x26, /* TEMP 1 in DataSheet */ 73 0x37, /* TEMP 1 Over in DataSheet */ 74 0x38 } /* TEMP 1 Hyst in DataSheet */ 75 }; 76 77 static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7}; 78 static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4}; 79 80 /* FAN Duty Cycle, be used to control */ 81 static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87}; 82 83 84 static inline u8 85 FAN_TO_REG(long rpm, int div) 86 { 87 if (rpm == 0) 88 return 255; 89 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 90 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254); 91 } 92 93 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \ 94 ((val) == 255 ? 0 : \ 95 1350000 / ((val) * (div)))) 96 97 /* for temp */ 98 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? \ 99 (val) + 0x100 * 1000 \ 100 : (val)) / 1000, 0, 0xff)) 101 #define TEMP_FROM_REG(val) (((val) & 0x80 ? \ 102 (val) - 0x100 : (val)) * 1000) 103 104 /* 105 * The analog voltage inputs have 8mV LSB. Since the sysfs output is 106 * in mV as would be measured on the chip input pin, need to just 107 * multiply/divide by 8 to translate from/to register values. 108 */ 109 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 4) / 8), 0, 255)) 110 #define IN_FROM_REG(val) ((val) * 8) 111 112 #define DIV_FROM_REG(val) (1 << (val)) 113 114 static inline u8 115 DIV_TO_REG(long val) 116 { 117 int i; 118 val = SENSORS_LIMIT(val, 1, 128) >> 1; 119 for (i = 0; i < 7; i++) { 120 if (val == 0) 121 break; 122 val >>= 1; 123 } 124 return (u8)i; 125 } 126 127 struct w83l786ng_data { 128 struct device *hwmon_dev; 129 struct mutex update_lock; 130 char valid; /* !=0 if following fields are valid */ 131 unsigned long last_updated; /* In jiffies */ 132 unsigned long last_nonvolatile; /* In jiffies, last time we update the 133 * nonvolatile registers */ 134 135 u8 in[3]; 136 u8 in_max[3]; 137 u8 in_min[3]; 138 u8 fan[2]; 139 u8 fan_div[2]; 140 u8 fan_min[2]; 141 u8 temp_type[2]; 142 u8 temp[2][3]; 143 u8 pwm[2]; 144 u8 pwm_mode[2]; /* 0->DC variable voltage 145 * 1->PWM variable duty cycle */ 146 147 u8 pwm_enable[2]; /* 1->manual 148 * 2->thermal cruise (also called SmartFan I) */ 149 u8 tolerance[2]; 150 }; 151 152 static int w83l786ng_probe(struct i2c_client *client, 153 const struct i2c_device_id *id); 154 static int w83l786ng_detect(struct i2c_client *client, 155 struct i2c_board_info *info); 156 static int w83l786ng_remove(struct i2c_client *client); 157 static void w83l786ng_init_client(struct i2c_client *client); 158 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev); 159 160 static const struct i2c_device_id w83l786ng_id[] = { 161 { "w83l786ng", 0 }, 162 { } 163 }; 164 MODULE_DEVICE_TABLE(i2c, w83l786ng_id); 165 166 static struct i2c_driver w83l786ng_driver = { 167 .class = I2C_CLASS_HWMON, 168 .driver = { 169 .name = "w83l786ng", 170 }, 171 .probe = w83l786ng_probe, 172 .remove = w83l786ng_remove, 173 .id_table = w83l786ng_id, 174 .detect = w83l786ng_detect, 175 .address_list = normal_i2c, 176 }; 177 178 static u8 179 w83l786ng_read_value(struct i2c_client *client, u8 reg) 180 { 181 return i2c_smbus_read_byte_data(client, reg); 182 } 183 184 static int 185 w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value) 186 { 187 return i2c_smbus_write_byte_data(client, reg, value); 188 } 189 190 /* following are the sysfs callback functions */ 191 #define show_in_reg(reg) \ 192 static ssize_t \ 193 show_##reg(struct device *dev, struct device_attribute *attr, \ 194 char *buf) \ 195 { \ 196 int nr = to_sensor_dev_attr(attr)->index; \ 197 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 198 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \ 199 } 200 201 show_in_reg(in) 202 show_in_reg(in_min) 203 show_in_reg(in_max) 204 205 #define store_in_reg(REG, reg) \ 206 static ssize_t \ 207 store_in_##reg(struct device *dev, struct device_attribute *attr, \ 208 const char *buf, size_t count) \ 209 { \ 210 int nr = to_sensor_dev_attr(attr)->index; \ 211 struct i2c_client *client = to_i2c_client(dev); \ 212 struct w83l786ng_data *data = i2c_get_clientdata(client); \ 213 unsigned long val; \ 214 int err = kstrtoul(buf, 10, &val); \ 215 if (err) \ 216 return err; \ 217 mutex_lock(&data->update_lock); \ 218 data->in_##reg[nr] = IN_TO_REG(val); \ 219 w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \ 220 data->in_##reg[nr]); \ 221 mutex_unlock(&data->update_lock); \ 222 return count; \ 223 } 224 225 store_in_reg(MIN, min) 226 store_in_reg(MAX, max) 227 228 static struct sensor_device_attribute sda_in_input[] = { 229 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0), 230 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1), 231 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2), 232 }; 233 234 static struct sensor_device_attribute sda_in_min[] = { 235 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0), 236 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1), 237 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2), 238 }; 239 240 static struct sensor_device_attribute sda_in_max[] = { 241 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0), 242 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1), 243 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2), 244 }; 245 246 #define show_fan_reg(reg) \ 247 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 248 char *buf) \ 249 { \ 250 int nr = to_sensor_dev_attr(attr)->index; \ 251 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 252 return sprintf(buf, "%d\n", \ 253 FAN_FROM_REG(data->fan[nr], DIV_FROM_REG(data->fan_div[nr]))); \ 254 } 255 256 show_fan_reg(fan); 257 show_fan_reg(fan_min); 258 259 static ssize_t 260 store_fan_min(struct device *dev, struct device_attribute *attr, 261 const char *buf, size_t count) 262 { 263 int nr = to_sensor_dev_attr(attr)->index; 264 struct i2c_client *client = to_i2c_client(dev); 265 struct w83l786ng_data *data = i2c_get_clientdata(client); 266 unsigned long val; 267 int err; 268 269 err = kstrtoul(buf, 10, &val); 270 if (err) 271 return err; 272 273 mutex_lock(&data->update_lock); 274 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 275 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 276 data->fan_min[nr]); 277 mutex_unlock(&data->update_lock); 278 279 return count; 280 } 281 282 static ssize_t 283 show_fan_div(struct device *dev, struct device_attribute *attr, 284 char *buf) 285 { 286 int nr = to_sensor_dev_attr(attr)->index; 287 struct w83l786ng_data *data = w83l786ng_update_device(dev); 288 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr])); 289 } 290 291 /* 292 * Note: we save and restore the fan minimum here, because its value is 293 * determined in part by the fan divisor. This follows the principle of 294 * least surprise; the user doesn't expect the fan minimum to change just 295 * because the divisor changed. 296 */ 297 static ssize_t 298 store_fan_div(struct device *dev, struct device_attribute *attr, 299 const char *buf, size_t count) 300 { 301 int nr = to_sensor_dev_attr(attr)->index; 302 struct i2c_client *client = to_i2c_client(dev); 303 struct w83l786ng_data *data = i2c_get_clientdata(client); 304 305 unsigned long min; 306 u8 tmp_fan_div; 307 u8 fan_div_reg; 308 u8 keep_mask = 0; 309 u8 new_shift = 0; 310 311 unsigned long val; 312 int err; 313 314 err = kstrtoul(buf, 10, &val); 315 if (err) 316 return err; 317 318 /* Save fan_min */ 319 mutex_lock(&data->update_lock); 320 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 321 322 data->fan_div[nr] = DIV_TO_REG(val); 323 324 switch (nr) { 325 case 0: 326 keep_mask = 0xf8; 327 new_shift = 0; 328 break; 329 case 1: 330 keep_mask = 0x8f; 331 new_shift = 4; 332 break; 333 } 334 335 fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV) 336 & keep_mask; 337 338 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask; 339 340 w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV, 341 fan_div_reg | tmp_fan_div); 342 343 /* Restore fan_min */ 344 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 345 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 346 data->fan_min[nr]); 347 mutex_unlock(&data->update_lock); 348 349 return count; 350 } 351 352 static struct sensor_device_attribute sda_fan_input[] = { 353 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0), 354 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1), 355 }; 356 357 static struct sensor_device_attribute sda_fan_min[] = { 358 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, 359 store_fan_min, 0), 360 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, 361 store_fan_min, 1), 362 }; 363 364 static struct sensor_device_attribute sda_fan_div[] = { 365 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div, 366 store_fan_div, 0), 367 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div, 368 store_fan_div, 1), 369 }; 370 371 372 /* read/write the temperature, includes measured value and limits */ 373 374 static ssize_t 375 show_temp(struct device *dev, struct device_attribute *attr, char *buf) 376 { 377 struct sensor_device_attribute_2 *sensor_attr = 378 to_sensor_dev_attr_2(attr); 379 int nr = sensor_attr->nr; 380 int index = sensor_attr->index; 381 struct w83l786ng_data *data = w83l786ng_update_device(dev); 382 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index])); 383 } 384 385 static ssize_t 386 store_temp(struct device *dev, struct device_attribute *attr, 387 const char *buf, size_t count) 388 { 389 struct sensor_device_attribute_2 *sensor_attr = 390 to_sensor_dev_attr_2(attr); 391 int nr = sensor_attr->nr; 392 int index = sensor_attr->index; 393 struct i2c_client *client = to_i2c_client(dev); 394 struct w83l786ng_data *data = i2c_get_clientdata(client); 395 long val; 396 int err; 397 398 err = kstrtol(buf, 10, &val); 399 if (err) 400 return err; 401 402 mutex_lock(&data->update_lock); 403 data->temp[nr][index] = TEMP_TO_REG(val); 404 w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index], 405 data->temp[nr][index]); 406 mutex_unlock(&data->update_lock); 407 408 return count; 409 } 410 411 static struct sensor_device_attribute_2 sda_temp_input[] = { 412 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0), 413 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0), 414 }; 415 416 static struct sensor_device_attribute_2 sda_temp_max[] = { 417 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, 418 show_temp, store_temp, 0, 1), 419 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, 420 show_temp, store_temp, 1, 1), 421 }; 422 423 static struct sensor_device_attribute_2 sda_temp_max_hyst[] = { 424 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR, 425 show_temp, store_temp, 0, 2), 426 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR, 427 show_temp, store_temp, 1, 2), 428 }; 429 430 #define show_pwm_reg(reg) \ 431 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 432 char *buf) \ 433 { \ 434 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 435 int nr = to_sensor_dev_attr(attr)->index; \ 436 return sprintf(buf, "%d\n", data->reg[nr]); \ 437 } 438 439 show_pwm_reg(pwm_mode) 440 show_pwm_reg(pwm_enable) 441 show_pwm_reg(pwm) 442 443 static ssize_t 444 store_pwm_mode(struct device *dev, struct device_attribute *attr, 445 const char *buf, size_t count) 446 { 447 int nr = to_sensor_dev_attr(attr)->index; 448 struct i2c_client *client = to_i2c_client(dev); 449 struct w83l786ng_data *data = i2c_get_clientdata(client); 450 u8 reg; 451 unsigned long val; 452 int err; 453 454 err = kstrtoul(buf, 10, &val); 455 if (err) 456 return err; 457 458 if (val > 1) 459 return -EINVAL; 460 mutex_lock(&data->update_lock); 461 data->pwm_mode[nr] = val; 462 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 463 reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]); 464 if (!val) 465 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr]; 466 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); 467 mutex_unlock(&data->update_lock); 468 return count; 469 } 470 471 static ssize_t 472 store_pwm(struct device *dev, struct device_attribute *attr, 473 const char *buf, size_t count) 474 { 475 int nr = to_sensor_dev_attr(attr)->index; 476 struct i2c_client *client = to_i2c_client(dev); 477 struct w83l786ng_data *data = i2c_get_clientdata(client); 478 unsigned long val; 479 int err; 480 481 err = kstrtoul(buf, 10, &val); 482 if (err) 483 return err; 484 val = SENSORS_LIMIT(val, 0, 255); 485 486 mutex_lock(&data->update_lock); 487 data->pwm[nr] = val; 488 w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val); 489 mutex_unlock(&data->update_lock); 490 return count; 491 } 492 493 static ssize_t 494 store_pwm_enable(struct device *dev, struct device_attribute *attr, 495 const char *buf, size_t count) 496 { 497 int nr = to_sensor_dev_attr(attr)->index; 498 struct i2c_client *client = to_i2c_client(dev); 499 struct w83l786ng_data *data = i2c_get_clientdata(client); 500 u8 reg; 501 unsigned long val; 502 int err; 503 504 err = kstrtoul(buf, 10, &val); 505 if (err) 506 return err; 507 508 if (!val || val > 2) /* only modes 1 and 2 are supported */ 509 return -EINVAL; 510 511 mutex_lock(&data->update_lock); 512 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 513 data->pwm_enable[nr] = val; 514 reg &= ~(0x02 << W83L786NG_PWM_ENABLE_SHIFT[nr]); 515 reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr]; 516 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); 517 mutex_unlock(&data->update_lock); 518 return count; 519 } 520 521 static struct sensor_device_attribute sda_pwm[] = { 522 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0), 523 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1), 524 }; 525 526 static struct sensor_device_attribute sda_pwm_mode[] = { 527 SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 528 store_pwm_mode, 0), 529 SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 530 store_pwm_mode, 1), 531 }; 532 533 static struct sensor_device_attribute sda_pwm_enable[] = { 534 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 535 store_pwm_enable, 0), 536 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 537 store_pwm_enable, 1), 538 }; 539 540 /* For Smart Fan I/Thermal Cruise and Smart Fan II */ 541 static ssize_t 542 show_tolerance(struct device *dev, struct device_attribute *attr, char *buf) 543 { 544 int nr = to_sensor_dev_attr(attr)->index; 545 struct w83l786ng_data *data = w83l786ng_update_device(dev); 546 return sprintf(buf, "%ld\n", (long)data->tolerance[nr]); 547 } 548 549 static ssize_t 550 store_tolerance(struct device *dev, struct device_attribute *attr, 551 const char *buf, size_t count) 552 { 553 int nr = to_sensor_dev_attr(attr)->index; 554 struct i2c_client *client = to_i2c_client(dev); 555 struct w83l786ng_data *data = i2c_get_clientdata(client); 556 u8 tol_tmp, tol_mask; 557 unsigned long val; 558 int err; 559 560 err = kstrtoul(buf, 10, &val); 561 if (err) 562 return err; 563 564 mutex_lock(&data->update_lock); 565 tol_mask = w83l786ng_read_value(client, 566 W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0); 567 tol_tmp = SENSORS_LIMIT(val, 0, 15); 568 tol_tmp &= 0x0f; 569 data->tolerance[nr] = tol_tmp; 570 if (nr == 1) 571 tol_tmp <<= 4; 572 573 w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE, 574 tol_mask | tol_tmp); 575 mutex_unlock(&data->update_lock); 576 return count; 577 } 578 579 static struct sensor_device_attribute sda_tolerance[] = { 580 SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO, 581 show_tolerance, store_tolerance, 0), 582 SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO, 583 show_tolerance, store_tolerance, 1), 584 }; 585 586 587 #define IN_UNIT_ATTRS(X) \ 588 &sda_in_input[X].dev_attr.attr, \ 589 &sda_in_min[X].dev_attr.attr, \ 590 &sda_in_max[X].dev_attr.attr 591 592 #define FAN_UNIT_ATTRS(X) \ 593 &sda_fan_input[X].dev_attr.attr, \ 594 &sda_fan_min[X].dev_attr.attr, \ 595 &sda_fan_div[X].dev_attr.attr 596 597 #define TEMP_UNIT_ATTRS(X) \ 598 &sda_temp_input[X].dev_attr.attr, \ 599 &sda_temp_max[X].dev_attr.attr, \ 600 &sda_temp_max_hyst[X].dev_attr.attr 601 602 #define PWM_UNIT_ATTRS(X) \ 603 &sda_pwm[X].dev_attr.attr, \ 604 &sda_pwm_mode[X].dev_attr.attr, \ 605 &sda_pwm_enable[X].dev_attr.attr 606 607 #define TOLERANCE_UNIT_ATTRS(X) \ 608 &sda_tolerance[X].dev_attr.attr 609 610 static struct attribute *w83l786ng_attributes[] = { 611 IN_UNIT_ATTRS(0), 612 IN_UNIT_ATTRS(1), 613 IN_UNIT_ATTRS(2), 614 FAN_UNIT_ATTRS(0), 615 FAN_UNIT_ATTRS(1), 616 TEMP_UNIT_ATTRS(0), 617 TEMP_UNIT_ATTRS(1), 618 PWM_UNIT_ATTRS(0), 619 PWM_UNIT_ATTRS(1), 620 TOLERANCE_UNIT_ATTRS(0), 621 TOLERANCE_UNIT_ATTRS(1), 622 NULL 623 }; 624 625 static const struct attribute_group w83l786ng_group = { 626 .attrs = w83l786ng_attributes, 627 }; 628 629 static int 630 w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info) 631 { 632 struct i2c_adapter *adapter = client->adapter; 633 u16 man_id; 634 u8 chip_id; 635 636 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 637 return -ENODEV; 638 639 /* Detection */ 640 if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) { 641 dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n", 642 client->addr); 643 return -ENODEV; 644 } 645 646 /* Identification */ 647 man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) + 648 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2); 649 chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID); 650 651 if (man_id != 0x5CA3 || /* Winbond */ 652 chip_id != 0x80) { /* W83L786NG */ 653 dev_dbg(&adapter->dev, 654 "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n", 655 man_id, chip_id); 656 return -ENODEV; 657 } 658 659 strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE); 660 661 return 0; 662 } 663 664 static int 665 w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id) 666 { 667 struct device *dev = &client->dev; 668 struct w83l786ng_data *data; 669 int i, err = 0; 670 u8 reg_tmp; 671 672 data = devm_kzalloc(&client->dev, sizeof(struct w83l786ng_data), 673 GFP_KERNEL); 674 if (!data) 675 return -ENOMEM; 676 677 i2c_set_clientdata(client, data); 678 mutex_init(&data->update_lock); 679 680 /* Initialize the chip */ 681 w83l786ng_init_client(client); 682 683 /* A few vars need to be filled upon startup */ 684 for (i = 0; i < 2; i++) { 685 data->fan_min[i] = w83l786ng_read_value(client, 686 W83L786NG_REG_FAN_MIN(i)); 687 } 688 689 /* Update the fan divisor */ 690 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 691 data->fan_div[0] = reg_tmp & 0x07; 692 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 693 694 /* Register sysfs hooks */ 695 err = sysfs_create_group(&client->dev.kobj, &w83l786ng_group); 696 if (err) 697 goto exit_remove; 698 699 data->hwmon_dev = hwmon_device_register(dev); 700 if (IS_ERR(data->hwmon_dev)) { 701 err = PTR_ERR(data->hwmon_dev); 702 goto exit_remove; 703 } 704 705 return 0; 706 707 /* Unregister sysfs hooks */ 708 709 exit_remove: 710 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); 711 return err; 712 } 713 714 static int 715 w83l786ng_remove(struct i2c_client *client) 716 { 717 struct w83l786ng_data *data = i2c_get_clientdata(client); 718 719 hwmon_device_unregister(data->hwmon_dev); 720 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); 721 722 return 0; 723 } 724 725 static void 726 w83l786ng_init_client(struct i2c_client *client) 727 { 728 u8 tmp; 729 730 if (reset) 731 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80); 732 733 /* Start monitoring */ 734 tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG); 735 if (!(tmp & 0x01)) 736 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01); 737 } 738 739 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev) 740 { 741 struct i2c_client *client = to_i2c_client(dev); 742 struct w83l786ng_data *data = i2c_get_clientdata(client); 743 int i, j; 744 u8 reg_tmp, pwmcfg; 745 746 mutex_lock(&data->update_lock); 747 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 748 || !data->valid) { 749 dev_dbg(&client->dev, "Updating w83l786ng data.\n"); 750 751 /* Update the voltages measured value and limits */ 752 for (i = 0; i < 3; i++) { 753 data->in[i] = w83l786ng_read_value(client, 754 W83L786NG_REG_IN(i)); 755 data->in_min[i] = w83l786ng_read_value(client, 756 W83L786NG_REG_IN_MIN(i)); 757 data->in_max[i] = w83l786ng_read_value(client, 758 W83L786NG_REG_IN_MAX(i)); 759 } 760 761 /* Update the fan counts and limits */ 762 for (i = 0; i < 2; i++) { 763 data->fan[i] = w83l786ng_read_value(client, 764 W83L786NG_REG_FAN(i)); 765 data->fan_min[i] = w83l786ng_read_value(client, 766 W83L786NG_REG_FAN_MIN(i)); 767 } 768 769 /* Update the fan divisor */ 770 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 771 data->fan_div[0] = reg_tmp & 0x07; 772 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 773 774 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 775 for (i = 0; i < 2; i++) { 776 data->pwm_mode[i] = 777 ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1) 778 ? 0 : 1; 779 data->pwm_enable[i] = 780 ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 2) + 1; 781 data->pwm[i] = w83l786ng_read_value(client, 782 W83L786NG_REG_PWM[i]); 783 } 784 785 786 /* Update the temperature sensors */ 787 for (i = 0; i < 2; i++) { 788 for (j = 0; j < 3; j++) { 789 data->temp[i][j] = w83l786ng_read_value(client, 790 W83L786NG_REG_TEMP[i][j]); 791 } 792 } 793 794 /* Update Smart Fan I/II tolerance */ 795 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE); 796 data->tolerance[0] = reg_tmp & 0x0f; 797 data->tolerance[1] = (reg_tmp >> 4) & 0x0f; 798 799 data->last_updated = jiffies; 800 data->valid = 1; 801 802 } 803 804 mutex_unlock(&data->update_lock); 805 806 return data; 807 } 808 809 module_i2c_driver(w83l786ng_driver); 810 811 MODULE_AUTHOR("Kevin Lo"); 812 MODULE_DESCRIPTION("w83l786ng driver"); 813 MODULE_LICENSE("GPL"); 814