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 = clamp_val(rpm, 1, 1000000); 90 return clamp_val((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) (clamp_val(((val) < 0 ? (val) + 0x100 * 1000 \ 99 : (val)) / 1000, 0, 0xff)) 100 #define TEMP_FROM_REG(val) (((val) & 0x80 ? \ 101 (val) - 0x100 : (val)) * 1000) 102 103 /* 104 * The analog voltage inputs have 8mV LSB. Since the sysfs output is 105 * in mV as would be measured on the chip input pin, need to just 106 * multiply/divide by 8 to translate from/to register values. 107 */ 108 #define IN_TO_REG(val) (clamp_val((((val) + 4) / 8), 0, 255)) 109 #define IN_FROM_REG(val) ((val) * 8) 110 111 #define DIV_FROM_REG(val) (1 << (val)) 112 113 static inline u8 114 DIV_TO_REG(long val) 115 { 116 int i; 117 val = clamp_val(val, 1, 128) >> 1; 118 for (i = 0; i < 7; i++) { 119 if (val == 0) 120 break; 121 val >>= 1; 122 } 123 return (u8)i; 124 } 125 126 struct w83l786ng_data { 127 struct device *hwmon_dev; 128 struct mutex update_lock; 129 char valid; /* !=0 if following fields are valid */ 130 unsigned long last_updated; /* In jiffies */ 131 unsigned long last_nonvolatile; /* In jiffies, last time we update the 132 * nonvolatile registers */ 133 134 u8 in[3]; 135 u8 in_max[3]; 136 u8 in_min[3]; 137 u8 fan[2]; 138 u8 fan_div[2]; 139 u8 fan_min[2]; 140 u8 temp_type[2]; 141 u8 temp[2][3]; 142 u8 pwm[2]; 143 u8 pwm_mode[2]; /* 0->DC variable voltage 144 * 1->PWM variable duty cycle */ 145 146 u8 pwm_enable[2]; /* 1->manual 147 * 2->thermal cruise (also called SmartFan I) */ 148 u8 tolerance[2]; 149 }; 150 151 static int w83l786ng_probe(struct i2c_client *client, 152 const struct i2c_device_id *id); 153 static int w83l786ng_detect(struct i2c_client *client, 154 struct i2c_board_info *info); 155 static int w83l786ng_remove(struct i2c_client *client); 156 static void w83l786ng_init_client(struct i2c_client *client); 157 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev); 158 159 static const struct i2c_device_id w83l786ng_id[] = { 160 { "w83l786ng", 0 }, 161 { } 162 }; 163 MODULE_DEVICE_TABLE(i2c, w83l786ng_id); 164 165 static struct i2c_driver w83l786ng_driver = { 166 .class = I2C_CLASS_HWMON, 167 .driver = { 168 .name = "w83l786ng", 169 }, 170 .probe = w83l786ng_probe, 171 .remove = w83l786ng_remove, 172 .id_table = w83l786ng_id, 173 .detect = w83l786ng_detect, 174 .address_list = normal_i2c, 175 }; 176 177 static u8 178 w83l786ng_read_value(struct i2c_client *client, u8 reg) 179 { 180 return i2c_smbus_read_byte_data(client, reg); 181 } 182 183 static int 184 w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value) 185 { 186 return i2c_smbus_write_byte_data(client, reg, value); 187 } 188 189 /* following are the sysfs callback functions */ 190 #define show_in_reg(reg) \ 191 static ssize_t \ 192 show_##reg(struct device *dev, struct device_attribute *attr, \ 193 char *buf) \ 194 { \ 195 int nr = to_sensor_dev_attr(attr)->index; \ 196 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 197 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \ 198 } 199 200 show_in_reg(in) 201 show_in_reg(in_min) 202 show_in_reg(in_max) 203 204 #define store_in_reg(REG, reg) \ 205 static ssize_t \ 206 store_in_##reg(struct device *dev, struct device_attribute *attr, \ 207 const char *buf, size_t count) \ 208 { \ 209 int nr = to_sensor_dev_attr(attr)->index; \ 210 struct i2c_client *client = to_i2c_client(dev); \ 211 struct w83l786ng_data *data = i2c_get_clientdata(client); \ 212 unsigned long val; \ 213 int err = kstrtoul(buf, 10, &val); \ 214 if (err) \ 215 return err; \ 216 mutex_lock(&data->update_lock); \ 217 data->in_##reg[nr] = IN_TO_REG(val); \ 218 w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \ 219 data->in_##reg[nr]); \ 220 mutex_unlock(&data->update_lock); \ 221 return count; \ 222 } 223 224 store_in_reg(MIN, min) 225 store_in_reg(MAX, max) 226 227 static struct sensor_device_attribute sda_in_input[] = { 228 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0), 229 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1), 230 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2), 231 }; 232 233 static struct sensor_device_attribute sda_in_min[] = { 234 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0), 235 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1), 236 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2), 237 }; 238 239 static struct sensor_device_attribute sda_in_max[] = { 240 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0), 241 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1), 242 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2), 243 }; 244 245 #define show_fan_reg(reg) \ 246 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 247 char *buf) \ 248 { \ 249 int nr = to_sensor_dev_attr(attr)->index; \ 250 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 251 return sprintf(buf, "%d\n", \ 252 FAN_FROM_REG(data->reg[nr], DIV_FROM_REG(data->fan_div[nr]))); \ 253 } 254 255 show_fan_reg(fan); 256 show_fan_reg(fan_min); 257 258 static ssize_t 259 store_fan_min(struct device *dev, struct device_attribute *attr, 260 const char *buf, size_t count) 261 { 262 int nr = to_sensor_dev_attr(attr)->index; 263 struct i2c_client *client = to_i2c_client(dev); 264 struct w83l786ng_data *data = i2c_get_clientdata(client); 265 unsigned long val; 266 int err; 267 268 err = kstrtoul(buf, 10, &val); 269 if (err) 270 return err; 271 272 mutex_lock(&data->update_lock); 273 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 274 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 275 data->fan_min[nr]); 276 mutex_unlock(&data->update_lock); 277 278 return count; 279 } 280 281 static ssize_t 282 show_fan_div(struct device *dev, struct device_attribute *attr, 283 char *buf) 284 { 285 int nr = to_sensor_dev_attr(attr)->index; 286 struct w83l786ng_data *data = w83l786ng_update_device(dev); 287 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr])); 288 } 289 290 /* 291 * Note: we save and restore the fan minimum here, because its value is 292 * determined in part by the fan divisor. This follows the principle of 293 * least surprise; the user doesn't expect the fan minimum to change just 294 * because the divisor changed. 295 */ 296 static ssize_t 297 store_fan_div(struct device *dev, struct device_attribute *attr, 298 const char *buf, size_t count) 299 { 300 int nr = to_sensor_dev_attr(attr)->index; 301 struct i2c_client *client = to_i2c_client(dev); 302 struct w83l786ng_data *data = i2c_get_clientdata(client); 303 304 unsigned long min; 305 u8 tmp_fan_div; 306 u8 fan_div_reg; 307 u8 keep_mask = 0; 308 u8 new_shift = 0; 309 310 unsigned long val; 311 int err; 312 313 err = kstrtoul(buf, 10, &val); 314 if (err) 315 return err; 316 317 /* Save fan_min */ 318 mutex_lock(&data->update_lock); 319 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 320 321 data->fan_div[nr] = DIV_TO_REG(val); 322 323 switch (nr) { 324 case 0: 325 keep_mask = 0xf8; 326 new_shift = 0; 327 break; 328 case 1: 329 keep_mask = 0x8f; 330 new_shift = 4; 331 break; 332 } 333 334 fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV) 335 & keep_mask; 336 337 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask; 338 339 w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV, 340 fan_div_reg | tmp_fan_div); 341 342 /* Restore fan_min */ 343 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 344 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 345 data->fan_min[nr]); 346 mutex_unlock(&data->update_lock); 347 348 return count; 349 } 350 351 static struct sensor_device_attribute sda_fan_input[] = { 352 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0), 353 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1), 354 }; 355 356 static struct sensor_device_attribute sda_fan_min[] = { 357 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, 358 store_fan_min, 0), 359 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, 360 store_fan_min, 1), 361 }; 362 363 static struct sensor_device_attribute sda_fan_div[] = { 364 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div, 365 store_fan_div, 0), 366 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div, 367 store_fan_div, 1), 368 }; 369 370 371 /* read/write the temperature, includes measured value and limits */ 372 373 static ssize_t 374 show_temp(struct device *dev, struct device_attribute *attr, char *buf) 375 { 376 struct sensor_device_attribute_2 *sensor_attr = 377 to_sensor_dev_attr_2(attr); 378 int nr = sensor_attr->nr; 379 int index = sensor_attr->index; 380 struct w83l786ng_data *data = w83l786ng_update_device(dev); 381 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index])); 382 } 383 384 static ssize_t 385 store_temp(struct device *dev, struct device_attribute *attr, 386 const char *buf, size_t count) 387 { 388 struct sensor_device_attribute_2 *sensor_attr = 389 to_sensor_dev_attr_2(attr); 390 int nr = sensor_attr->nr; 391 int index = sensor_attr->index; 392 struct i2c_client *client = to_i2c_client(dev); 393 struct w83l786ng_data *data = i2c_get_clientdata(client); 394 long val; 395 int err; 396 397 err = kstrtol(buf, 10, &val); 398 if (err) 399 return err; 400 401 mutex_lock(&data->update_lock); 402 data->temp[nr][index] = TEMP_TO_REG(val); 403 w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index], 404 data->temp[nr][index]); 405 mutex_unlock(&data->update_lock); 406 407 return count; 408 } 409 410 static struct sensor_device_attribute_2 sda_temp_input[] = { 411 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0), 412 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0), 413 }; 414 415 static struct sensor_device_attribute_2 sda_temp_max[] = { 416 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, 417 show_temp, store_temp, 0, 1), 418 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, 419 show_temp, store_temp, 1, 1), 420 }; 421 422 static struct sensor_device_attribute_2 sda_temp_max_hyst[] = { 423 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR, 424 show_temp, store_temp, 0, 2), 425 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR, 426 show_temp, store_temp, 1, 2), 427 }; 428 429 #define show_pwm_reg(reg) \ 430 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 431 char *buf) \ 432 { \ 433 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 434 int nr = to_sensor_dev_attr(attr)->index; \ 435 return sprintf(buf, "%d\n", data->reg[nr]); \ 436 } 437 438 show_pwm_reg(pwm_mode) 439 show_pwm_reg(pwm_enable) 440 show_pwm_reg(pwm) 441 442 static ssize_t 443 store_pwm_mode(struct device *dev, struct device_attribute *attr, 444 const char *buf, size_t count) 445 { 446 int nr = to_sensor_dev_attr(attr)->index; 447 struct i2c_client *client = to_i2c_client(dev); 448 struct w83l786ng_data *data = i2c_get_clientdata(client); 449 u8 reg; 450 unsigned long val; 451 int err; 452 453 err = kstrtoul(buf, 10, &val); 454 if (err) 455 return err; 456 457 if (val > 1) 458 return -EINVAL; 459 mutex_lock(&data->update_lock); 460 data->pwm_mode[nr] = val; 461 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 462 reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]); 463 if (!val) 464 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr]; 465 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); 466 mutex_unlock(&data->update_lock); 467 return count; 468 } 469 470 static ssize_t 471 store_pwm(struct device *dev, struct device_attribute *attr, 472 const char *buf, size_t count) 473 { 474 int nr = to_sensor_dev_attr(attr)->index; 475 struct i2c_client *client = to_i2c_client(dev); 476 struct w83l786ng_data *data = i2c_get_clientdata(client); 477 unsigned long val; 478 int err; 479 480 err = kstrtoul(buf, 10, &val); 481 if (err) 482 return err; 483 val = clamp_val(val, 0, 255); 484 val = DIV_ROUND_CLOSEST(val, 0x11); 485 486 mutex_lock(&data->update_lock); 487 data->pwm[nr] = val * 0x11; 488 val |= w83l786ng_read_value(client, W83L786NG_REG_PWM[nr]) & 0xf0; 489 w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val); 490 mutex_unlock(&data->update_lock); 491 return count; 492 } 493 494 static ssize_t 495 store_pwm_enable(struct device *dev, struct device_attribute *attr, 496 const char *buf, size_t count) 497 { 498 int nr = to_sensor_dev_attr(attr)->index; 499 struct i2c_client *client = to_i2c_client(dev); 500 struct w83l786ng_data *data = i2c_get_clientdata(client); 501 u8 reg; 502 unsigned long val; 503 int err; 504 505 err = kstrtoul(buf, 10, &val); 506 if (err) 507 return err; 508 509 if (!val || val > 2) /* only modes 1 and 2 are supported */ 510 return -EINVAL; 511 512 mutex_lock(&data->update_lock); 513 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 514 data->pwm_enable[nr] = val; 515 reg &= ~(0x03 << W83L786NG_PWM_ENABLE_SHIFT[nr]); 516 reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr]; 517 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); 518 mutex_unlock(&data->update_lock); 519 return count; 520 } 521 522 static struct sensor_device_attribute sda_pwm[] = { 523 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0), 524 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1), 525 }; 526 527 static struct sensor_device_attribute sda_pwm_mode[] = { 528 SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 529 store_pwm_mode, 0), 530 SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 531 store_pwm_mode, 1), 532 }; 533 534 static struct sensor_device_attribute sda_pwm_enable[] = { 535 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 536 store_pwm_enable, 0), 537 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 538 store_pwm_enable, 1), 539 }; 540 541 /* For Smart Fan I/Thermal Cruise and Smart Fan II */ 542 static ssize_t 543 show_tolerance(struct device *dev, struct device_attribute *attr, char *buf) 544 { 545 int nr = to_sensor_dev_attr(attr)->index; 546 struct w83l786ng_data *data = w83l786ng_update_device(dev); 547 return sprintf(buf, "%ld\n", (long)data->tolerance[nr]); 548 } 549 550 static ssize_t 551 store_tolerance(struct device *dev, struct device_attribute *attr, 552 const char *buf, size_t count) 553 { 554 int nr = to_sensor_dev_attr(attr)->index; 555 struct i2c_client *client = to_i2c_client(dev); 556 struct w83l786ng_data *data = i2c_get_clientdata(client); 557 u8 tol_tmp, tol_mask; 558 unsigned long val; 559 int err; 560 561 err = kstrtoul(buf, 10, &val); 562 if (err) 563 return err; 564 565 mutex_lock(&data->update_lock); 566 tol_mask = w83l786ng_read_value(client, 567 W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0); 568 tol_tmp = clamp_val(val, 0, 15); 569 tol_tmp &= 0x0f; 570 data->tolerance[nr] = tol_tmp; 571 if (nr == 1) 572 tol_tmp <<= 4; 573 574 w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE, 575 tol_mask | tol_tmp); 576 mutex_unlock(&data->update_lock); 577 return count; 578 } 579 580 static struct sensor_device_attribute sda_tolerance[] = { 581 SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO, 582 show_tolerance, store_tolerance, 0), 583 SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO, 584 show_tolerance, store_tolerance, 1), 585 }; 586 587 588 #define IN_UNIT_ATTRS(X) \ 589 &sda_in_input[X].dev_attr.attr, \ 590 &sda_in_min[X].dev_attr.attr, \ 591 &sda_in_max[X].dev_attr.attr 592 593 #define FAN_UNIT_ATTRS(X) \ 594 &sda_fan_input[X].dev_attr.attr, \ 595 &sda_fan_min[X].dev_attr.attr, \ 596 &sda_fan_div[X].dev_attr.attr 597 598 #define TEMP_UNIT_ATTRS(X) \ 599 &sda_temp_input[X].dev_attr.attr, \ 600 &sda_temp_max[X].dev_attr.attr, \ 601 &sda_temp_max_hyst[X].dev_attr.attr 602 603 #define PWM_UNIT_ATTRS(X) \ 604 &sda_pwm[X].dev_attr.attr, \ 605 &sda_pwm_mode[X].dev_attr.attr, \ 606 &sda_pwm_enable[X].dev_attr.attr 607 608 #define TOLERANCE_UNIT_ATTRS(X) \ 609 &sda_tolerance[X].dev_attr.attr 610 611 static struct attribute *w83l786ng_attributes[] = { 612 IN_UNIT_ATTRS(0), 613 IN_UNIT_ATTRS(1), 614 IN_UNIT_ATTRS(2), 615 FAN_UNIT_ATTRS(0), 616 FAN_UNIT_ATTRS(1), 617 TEMP_UNIT_ATTRS(0), 618 TEMP_UNIT_ATTRS(1), 619 PWM_UNIT_ATTRS(0), 620 PWM_UNIT_ATTRS(1), 621 TOLERANCE_UNIT_ATTRS(0), 622 TOLERANCE_UNIT_ATTRS(1), 623 NULL 624 }; 625 626 static const struct attribute_group w83l786ng_group = { 627 .attrs = w83l786ng_attributes, 628 }; 629 630 static int 631 w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info) 632 { 633 struct i2c_adapter *adapter = client->adapter; 634 u16 man_id; 635 u8 chip_id; 636 637 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 638 return -ENODEV; 639 640 /* Detection */ 641 if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) { 642 dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n", 643 client->addr); 644 return -ENODEV; 645 } 646 647 /* Identification */ 648 man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) + 649 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2); 650 chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID); 651 652 if (man_id != 0x5CA3 || /* Winbond */ 653 chip_id != 0x80) { /* W83L786NG */ 654 dev_dbg(&adapter->dev, 655 "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n", 656 man_id, chip_id); 657 return -ENODEV; 658 } 659 660 strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE); 661 662 return 0; 663 } 664 665 static int 666 w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id) 667 { 668 struct device *dev = &client->dev; 669 struct w83l786ng_data *data; 670 int i, err = 0; 671 u8 reg_tmp; 672 673 data = devm_kzalloc(&client->dev, sizeof(struct w83l786ng_data), 674 GFP_KERNEL); 675 if (!data) 676 return -ENOMEM; 677 678 i2c_set_clientdata(client, data); 679 mutex_init(&data->update_lock); 680 681 /* Initialize the chip */ 682 w83l786ng_init_client(client); 683 684 /* A few vars need to be filled upon startup */ 685 for (i = 0; i < 2; i++) { 686 data->fan_min[i] = w83l786ng_read_value(client, 687 W83L786NG_REG_FAN_MIN(i)); 688 } 689 690 /* Update the fan divisor */ 691 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 692 data->fan_div[0] = reg_tmp & 0x07; 693 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 694 695 /* Register sysfs hooks */ 696 err = sysfs_create_group(&client->dev.kobj, &w83l786ng_group); 697 if (err) 698 goto exit_remove; 699 700 data->hwmon_dev = hwmon_device_register(dev); 701 if (IS_ERR(data->hwmon_dev)) { 702 err = PTR_ERR(data->hwmon_dev); 703 goto exit_remove; 704 } 705 706 return 0; 707 708 /* Unregister sysfs hooks */ 709 710 exit_remove: 711 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); 712 return err; 713 } 714 715 static int 716 w83l786ng_remove(struct i2c_client *client) 717 { 718 struct w83l786ng_data *data = i2c_get_clientdata(client); 719 720 hwmon_device_unregister(data->hwmon_dev); 721 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); 722 723 return 0; 724 } 725 726 static void 727 w83l786ng_init_client(struct i2c_client *client) 728 { 729 u8 tmp; 730 731 if (reset) 732 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80); 733 734 /* Start monitoring */ 735 tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG); 736 if (!(tmp & 0x01)) 737 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01); 738 } 739 740 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev) 741 { 742 struct i2c_client *client = to_i2c_client(dev); 743 struct w83l786ng_data *data = i2c_get_clientdata(client); 744 int i, j; 745 u8 reg_tmp, pwmcfg; 746 747 mutex_lock(&data->update_lock); 748 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 749 || !data->valid) { 750 dev_dbg(&client->dev, "Updating w83l786ng data.\n"); 751 752 /* Update the voltages measured value and limits */ 753 for (i = 0; i < 3; i++) { 754 data->in[i] = w83l786ng_read_value(client, 755 W83L786NG_REG_IN(i)); 756 data->in_min[i] = w83l786ng_read_value(client, 757 W83L786NG_REG_IN_MIN(i)); 758 data->in_max[i] = w83l786ng_read_value(client, 759 W83L786NG_REG_IN_MAX(i)); 760 } 761 762 /* Update the fan counts and limits */ 763 for (i = 0; i < 2; i++) { 764 data->fan[i] = w83l786ng_read_value(client, 765 W83L786NG_REG_FAN(i)); 766 data->fan_min[i] = w83l786ng_read_value(client, 767 W83L786NG_REG_FAN_MIN(i)); 768 } 769 770 /* Update the fan divisor */ 771 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 772 data->fan_div[0] = reg_tmp & 0x07; 773 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 774 775 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 776 for (i = 0; i < 2; i++) { 777 data->pwm_mode[i] = 778 ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1) 779 ? 0 : 1; 780 data->pwm_enable[i] = 781 ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 3) + 1; 782 data->pwm[i] = 783 (w83l786ng_read_value(client, W83L786NG_REG_PWM[i]) 784 & 0x0f) * 0x11; 785 } 786 787 788 /* Update the temperature sensors */ 789 for (i = 0; i < 2; i++) { 790 for (j = 0; j < 3; j++) { 791 data->temp[i][j] = w83l786ng_read_value(client, 792 W83L786NG_REG_TEMP[i][j]); 793 } 794 } 795 796 /* Update Smart Fan I/II tolerance */ 797 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE); 798 data->tolerance[0] = reg_tmp & 0x0f; 799 data->tolerance[1] = (reg_tmp >> 4) & 0x0f; 800 801 data->last_updated = jiffies; 802 data->valid = 1; 803 804 } 805 806 mutex_unlock(&data->update_lock); 807 808 return data; 809 } 810 811 module_i2c_driver(w83l786ng_driver); 812 813 MODULE_AUTHOR("Kevin Lo"); 814 MODULE_DESCRIPTION("w83l786ng driver"); 815 MODULE_LICENSE("GPL"); 816