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 37 /* Addresses to scan */ 38 static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END }; 39 40 /* Insmod parameters */ 41 42 static bool reset; 43 module_param(reset, bool, 0); 44 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended"); 45 46 #define W83L786NG_REG_IN_MIN(nr) (0x2C + (nr) * 2) 47 #define W83L786NG_REG_IN_MAX(nr) (0x2B + (nr) * 2) 48 #define W83L786NG_REG_IN(nr) ((nr) + 0x20) 49 50 #define W83L786NG_REG_FAN(nr) ((nr) + 0x28) 51 #define W83L786NG_REG_FAN_MIN(nr) ((nr) + 0x3B) 52 53 #define W83L786NG_REG_CONFIG 0x40 54 #define W83L786NG_REG_ALARM1 0x41 55 #define W83L786NG_REG_ALARM2 0x42 56 #define W83L786NG_REG_GPIO_EN 0x47 57 #define W83L786NG_REG_MAN_ID2 0x4C 58 #define W83L786NG_REG_MAN_ID1 0x4D 59 #define W83L786NG_REG_CHIP_ID 0x4E 60 61 #define W83L786NG_REG_DIODE 0x53 62 #define W83L786NG_REG_FAN_DIV 0x54 63 #define W83L786NG_REG_FAN_CFG 0x80 64 65 #define W83L786NG_REG_TOLERANCE 0x8D 66 67 static const u8 W83L786NG_REG_TEMP[2][3] = { 68 { 0x25, /* TEMP 0 in DataSheet */ 69 0x35, /* TEMP 0 Over in DataSheet */ 70 0x36 }, /* TEMP 0 Hyst in DataSheet */ 71 { 0x26, /* TEMP 1 in DataSheet */ 72 0x37, /* TEMP 1 Over in DataSheet */ 73 0x38 } /* TEMP 1 Hyst in DataSheet */ 74 }; 75 76 static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7}; 77 static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4}; 78 79 /* FAN Duty Cycle, be used to control */ 80 static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87}; 81 82 83 static inline u8 84 FAN_TO_REG(long rpm, int div) 85 { 86 if (rpm == 0) 87 return 255; 88 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 89 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254); 90 } 91 92 #define FAN_FROM_REG(val,div) ((val) == 0 ? -1 : \ 93 ((val) == 255 ? 0 : \ 94 1350000 / ((val) * (div)))) 95 96 /* for temp */ 97 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (val)+0x100*1000 \ 98 : (val)) / 1000, 0, 0xff)) 99 #define TEMP_FROM_REG(val) (((val) & 0x80 ? (val)-0x100 : (val)) * 1000) 100 101 /* The analog voltage inputs have 8mV LSB. Since the sysfs output is 102 in mV as would be measured on the chip input pin, need to just 103 multiply/divide by 8 to translate from/to register values. */ 104 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 4) / 8), 0, 255)) 105 #define IN_FROM_REG(val) ((val) * 8) 106 107 #define DIV_FROM_REG(val) (1 << (val)) 108 109 static inline u8 110 DIV_TO_REG(long val) 111 { 112 int i; 113 val = SENSORS_LIMIT(val, 1, 128) >> 1; 114 for (i = 0; i < 7; i++) { 115 if (val == 0) 116 break; 117 val >>= 1; 118 } 119 return ((u8) i); 120 } 121 122 struct w83l786ng_data { 123 struct device *hwmon_dev; 124 struct mutex update_lock; 125 char valid; /* !=0 if following fields are valid */ 126 unsigned long last_updated; /* In jiffies */ 127 unsigned long last_nonvolatile; /* In jiffies, last time we update the 128 nonvolatile registers */ 129 130 u8 in[3]; 131 u8 in_max[3]; 132 u8 in_min[3]; 133 u8 fan[2]; 134 u8 fan_div[2]; 135 u8 fan_min[2]; 136 u8 temp_type[2]; 137 u8 temp[2][3]; 138 u8 pwm[2]; 139 u8 pwm_mode[2]; /* 0->DC variable voltage 140 1->PWM variable duty cycle */ 141 142 u8 pwm_enable[2]; /* 1->manual 143 2->thermal cruise (also called SmartFan I) */ 144 u8 tolerance[2]; 145 }; 146 147 static int w83l786ng_probe(struct i2c_client *client, 148 const struct i2c_device_id *id); 149 static int w83l786ng_detect(struct i2c_client *client, 150 struct i2c_board_info *info); 151 static int w83l786ng_remove(struct i2c_client *client); 152 static void w83l786ng_init_client(struct i2c_client *client); 153 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev); 154 155 static const struct i2c_device_id w83l786ng_id[] = { 156 { "w83l786ng", 0 }, 157 { } 158 }; 159 MODULE_DEVICE_TABLE(i2c, w83l786ng_id); 160 161 static struct i2c_driver w83l786ng_driver = { 162 .class = I2C_CLASS_HWMON, 163 .driver = { 164 .name = "w83l786ng", 165 }, 166 .probe = w83l786ng_probe, 167 .remove = w83l786ng_remove, 168 .id_table = w83l786ng_id, 169 .detect = w83l786ng_detect, 170 .address_list = normal_i2c, 171 }; 172 173 static u8 174 w83l786ng_read_value(struct i2c_client *client, u8 reg) 175 { 176 return i2c_smbus_read_byte_data(client, reg); 177 } 178 179 static int 180 w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value) 181 { 182 return i2c_smbus_write_byte_data(client, reg, value); 183 } 184 185 /* following are the sysfs callback functions */ 186 #define show_in_reg(reg) \ 187 static ssize_t \ 188 show_##reg(struct device *dev, struct device_attribute *attr, \ 189 char *buf) \ 190 { \ 191 int nr = to_sensor_dev_attr(attr)->index; \ 192 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 193 return sprintf(buf,"%d\n", IN_FROM_REG(data->reg[nr])); \ 194 } 195 196 show_in_reg(in) 197 show_in_reg(in_min) 198 show_in_reg(in_max) 199 200 #define store_in_reg(REG, reg) \ 201 static ssize_t \ 202 store_in_##reg (struct device *dev, struct device_attribute *attr, \ 203 const char *buf, size_t count) \ 204 { \ 205 int nr = to_sensor_dev_attr(attr)->index; \ 206 struct i2c_client *client = to_i2c_client(dev); \ 207 struct w83l786ng_data *data = i2c_get_clientdata(client); \ 208 unsigned long val = simple_strtoul(buf, NULL, 10); \ 209 mutex_lock(&data->update_lock); \ 210 data->in_##reg[nr] = IN_TO_REG(val); \ 211 w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \ 212 data->in_##reg[nr]); \ 213 mutex_unlock(&data->update_lock); \ 214 return count; \ 215 } 216 217 store_in_reg(MIN, min) 218 store_in_reg(MAX, max) 219 220 static struct sensor_device_attribute sda_in_input[] = { 221 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0), 222 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1), 223 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2), 224 }; 225 226 static struct sensor_device_attribute sda_in_min[] = { 227 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0), 228 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1), 229 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2), 230 }; 231 232 static struct sensor_device_attribute sda_in_max[] = { 233 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0), 234 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1), 235 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2), 236 }; 237 238 #define show_fan_reg(reg) \ 239 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 240 char *buf) \ 241 { \ 242 int nr = to_sensor_dev_attr(attr)->index; \ 243 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 244 return sprintf(buf,"%d\n", \ 245 FAN_FROM_REG(data->fan[nr], DIV_FROM_REG(data->fan_div[nr]))); \ 246 } 247 248 show_fan_reg(fan); 249 show_fan_reg(fan_min); 250 251 static ssize_t 252 store_fan_min(struct device *dev, struct device_attribute *attr, 253 const char *buf, size_t count) 254 { 255 int nr = to_sensor_dev_attr(attr)->index; 256 struct i2c_client *client = to_i2c_client(dev); 257 struct w83l786ng_data *data = i2c_get_clientdata(client); 258 u32 val; 259 260 val = simple_strtoul(buf, NULL, 10); 261 mutex_lock(&data->update_lock); 262 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 263 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 264 data->fan_min[nr]); 265 mutex_unlock(&data->update_lock); 266 267 return count; 268 } 269 270 static ssize_t 271 show_fan_div(struct device *dev, struct device_attribute *attr, 272 char *buf) 273 { 274 int nr = to_sensor_dev_attr(attr)->index; 275 struct w83l786ng_data *data = w83l786ng_update_device(dev); 276 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr])); 277 } 278 279 /* Note: we save and restore the fan minimum here, because its value is 280 determined in part by the fan divisor. This follows the principle of 281 least surprise; the user doesn't expect the fan minimum to change just 282 because the divisor changed. */ 283 static ssize_t 284 store_fan_div(struct device *dev, struct device_attribute *attr, 285 const char *buf, size_t count) 286 { 287 int nr = to_sensor_dev_attr(attr)->index; 288 struct i2c_client *client = to_i2c_client(dev); 289 struct w83l786ng_data *data = i2c_get_clientdata(client); 290 291 unsigned long min; 292 u8 tmp_fan_div; 293 u8 fan_div_reg; 294 u8 keep_mask = 0; 295 u8 new_shift = 0; 296 297 /* Save fan_min */ 298 mutex_lock(&data->update_lock); 299 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 300 301 data->fan_div[nr] = DIV_TO_REG(simple_strtoul(buf, NULL, 10)); 302 303 switch (nr) { 304 case 0: 305 keep_mask = 0xf8; 306 new_shift = 0; 307 break; 308 case 1: 309 keep_mask = 0x8f; 310 new_shift = 4; 311 break; 312 } 313 314 fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV) 315 & keep_mask; 316 317 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask; 318 319 w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV, 320 fan_div_reg | tmp_fan_div); 321 322 /* Restore fan_min */ 323 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 324 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 325 data->fan_min[nr]); 326 mutex_unlock(&data->update_lock); 327 328 return count; 329 } 330 331 static struct sensor_device_attribute sda_fan_input[] = { 332 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0), 333 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1), 334 }; 335 336 static struct sensor_device_attribute sda_fan_min[] = { 337 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, 338 store_fan_min, 0), 339 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, 340 store_fan_min, 1), 341 }; 342 343 static struct sensor_device_attribute sda_fan_div[] = { 344 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div, 345 store_fan_div, 0), 346 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div, 347 store_fan_div, 1), 348 }; 349 350 351 /* read/write the temperature, includes measured value and limits */ 352 353 static ssize_t 354 show_temp(struct device *dev, struct device_attribute *attr, char *buf) 355 { 356 struct sensor_device_attribute_2 *sensor_attr = 357 to_sensor_dev_attr_2(attr); 358 int nr = sensor_attr->nr; 359 int index = sensor_attr->index; 360 struct w83l786ng_data *data = w83l786ng_update_device(dev); 361 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index])); 362 } 363 364 static ssize_t 365 store_temp(struct device *dev, struct device_attribute *attr, 366 const char *buf, size_t count) 367 { 368 struct sensor_device_attribute_2 *sensor_attr = 369 to_sensor_dev_attr_2(attr); 370 int nr = sensor_attr->nr; 371 int index = sensor_attr->index; 372 struct i2c_client *client = to_i2c_client(dev); 373 struct w83l786ng_data *data = i2c_get_clientdata(client); 374 s32 val; 375 376 val = simple_strtol(buf, NULL, 10); 377 mutex_lock(&data->update_lock); 378 data->temp[nr][index] = TEMP_TO_REG(val); 379 w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index], 380 data->temp[nr][index]); 381 mutex_unlock(&data->update_lock); 382 383 return count; 384 } 385 386 static struct sensor_device_attribute_2 sda_temp_input[] = { 387 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0), 388 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0), 389 }; 390 391 static struct sensor_device_attribute_2 sda_temp_max[] = { 392 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, 393 show_temp, store_temp, 0, 1), 394 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, 395 show_temp, store_temp, 1, 1), 396 }; 397 398 static struct sensor_device_attribute_2 sda_temp_max_hyst[] = { 399 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR, 400 show_temp, store_temp, 0, 2), 401 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR, 402 show_temp, store_temp, 1, 2), 403 }; 404 405 #define show_pwm_reg(reg) \ 406 static ssize_t show_##reg (struct device *dev, struct device_attribute *attr, \ 407 char *buf) \ 408 { \ 409 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 410 int nr = to_sensor_dev_attr(attr)->index; \ 411 return sprintf(buf, "%d\n", data->reg[nr]); \ 412 } 413 414 show_pwm_reg(pwm_mode) 415 show_pwm_reg(pwm_enable) 416 show_pwm_reg(pwm) 417 418 static ssize_t 419 store_pwm_mode(struct device *dev, struct device_attribute *attr, 420 const char *buf, size_t count) 421 { 422 int nr = to_sensor_dev_attr(attr)->index; 423 struct i2c_client *client = to_i2c_client(dev); 424 struct w83l786ng_data *data = i2c_get_clientdata(client); 425 u32 val = simple_strtoul(buf, NULL, 10); 426 u8 reg; 427 428 if (val > 1) 429 return -EINVAL; 430 mutex_lock(&data->update_lock); 431 data->pwm_mode[nr] = val; 432 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 433 reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]); 434 if (!val) 435 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr]; 436 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); 437 mutex_unlock(&data->update_lock); 438 return count; 439 } 440 441 static ssize_t 442 store_pwm(struct device *dev, struct device_attribute *attr, 443 const char *buf, size_t count) 444 { 445 int nr = to_sensor_dev_attr(attr)->index; 446 struct i2c_client *client = to_i2c_client(dev); 447 struct w83l786ng_data *data = i2c_get_clientdata(client); 448 u32 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 255); 449 450 mutex_lock(&data->update_lock); 451 data->pwm[nr] = val; 452 w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val); 453 mutex_unlock(&data->update_lock); 454 return count; 455 } 456 457 static ssize_t 458 store_pwm_enable(struct device *dev, struct device_attribute *attr, 459 const char *buf, size_t count) 460 { 461 int nr = to_sensor_dev_attr(attr)->index; 462 struct i2c_client *client = to_i2c_client(dev); 463 struct w83l786ng_data *data = i2c_get_clientdata(client); 464 u32 val = simple_strtoul(buf, NULL, 10); 465 466 u8 reg; 467 468 if (!val || (val > 2)) /* only modes 1 and 2 are supported */ 469 return -EINVAL; 470 471 mutex_lock(&data->update_lock); 472 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 473 data->pwm_enable[nr] = val; 474 reg &= ~(0x02 << W83L786NG_PWM_ENABLE_SHIFT[nr]); 475 reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr]; 476 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); 477 mutex_unlock(&data->update_lock); 478 return count; 479 } 480 481 static struct sensor_device_attribute sda_pwm[] = { 482 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0), 483 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1), 484 }; 485 486 static struct sensor_device_attribute sda_pwm_mode[] = { 487 SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 488 store_pwm_mode, 0), 489 SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 490 store_pwm_mode, 1), 491 }; 492 493 static struct sensor_device_attribute sda_pwm_enable[] = { 494 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 495 store_pwm_enable, 0), 496 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 497 store_pwm_enable, 1), 498 }; 499 500 /* For Smart Fan I/Thermal Cruise and Smart Fan II */ 501 static ssize_t 502 show_tolerance(struct device *dev, struct device_attribute *attr, char *buf) 503 { 504 int nr = to_sensor_dev_attr(attr)->index; 505 struct w83l786ng_data *data = w83l786ng_update_device(dev); 506 return sprintf(buf, "%ld\n", (long)data->tolerance[nr]); 507 } 508 509 static ssize_t 510 store_tolerance(struct device *dev, struct device_attribute *attr, 511 const char *buf, size_t count) 512 { 513 int nr = to_sensor_dev_attr(attr)->index; 514 struct i2c_client *client = to_i2c_client(dev); 515 struct w83l786ng_data *data = i2c_get_clientdata(client); 516 u32 val; 517 u8 tol_tmp, tol_mask; 518 519 val = simple_strtoul(buf, NULL, 10); 520 521 mutex_lock(&data->update_lock); 522 tol_mask = w83l786ng_read_value(client, 523 W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0); 524 tol_tmp = SENSORS_LIMIT(val, 0, 15); 525 tol_tmp &= 0x0f; 526 data->tolerance[nr] = tol_tmp; 527 if (nr == 1) { 528 tol_tmp <<= 4; 529 } 530 531 w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE, 532 tol_mask | tol_tmp); 533 mutex_unlock(&data->update_lock); 534 return count; 535 } 536 537 static struct sensor_device_attribute sda_tolerance[] = { 538 SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO, 539 show_tolerance, store_tolerance, 0), 540 SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO, 541 show_tolerance, store_tolerance, 1), 542 }; 543 544 545 #define IN_UNIT_ATTRS(X) \ 546 &sda_in_input[X].dev_attr.attr, \ 547 &sda_in_min[X].dev_attr.attr, \ 548 &sda_in_max[X].dev_attr.attr 549 550 #define FAN_UNIT_ATTRS(X) \ 551 &sda_fan_input[X].dev_attr.attr, \ 552 &sda_fan_min[X].dev_attr.attr, \ 553 &sda_fan_div[X].dev_attr.attr 554 555 #define TEMP_UNIT_ATTRS(X) \ 556 &sda_temp_input[X].dev_attr.attr, \ 557 &sda_temp_max[X].dev_attr.attr, \ 558 &sda_temp_max_hyst[X].dev_attr.attr 559 560 #define PWM_UNIT_ATTRS(X) \ 561 &sda_pwm[X].dev_attr.attr, \ 562 &sda_pwm_mode[X].dev_attr.attr, \ 563 &sda_pwm_enable[X].dev_attr.attr 564 565 #define TOLERANCE_UNIT_ATTRS(X) \ 566 &sda_tolerance[X].dev_attr.attr 567 568 static struct attribute *w83l786ng_attributes[] = { 569 IN_UNIT_ATTRS(0), 570 IN_UNIT_ATTRS(1), 571 IN_UNIT_ATTRS(2), 572 FAN_UNIT_ATTRS(0), 573 FAN_UNIT_ATTRS(1), 574 TEMP_UNIT_ATTRS(0), 575 TEMP_UNIT_ATTRS(1), 576 PWM_UNIT_ATTRS(0), 577 PWM_UNIT_ATTRS(1), 578 TOLERANCE_UNIT_ATTRS(0), 579 TOLERANCE_UNIT_ATTRS(1), 580 NULL 581 }; 582 583 static const struct attribute_group w83l786ng_group = { 584 .attrs = w83l786ng_attributes, 585 }; 586 587 static int 588 w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info) 589 { 590 struct i2c_adapter *adapter = client->adapter; 591 u16 man_id; 592 u8 chip_id; 593 594 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { 595 return -ENODEV; 596 } 597 598 /* Detection */ 599 if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) { 600 dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n", 601 client->addr); 602 return -ENODEV; 603 } 604 605 /* Identification */ 606 man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) + 607 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2); 608 chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID); 609 610 if (man_id != 0x5CA3 || /* Winbond */ 611 chip_id != 0x80) { /* W83L786NG */ 612 dev_dbg(&adapter->dev, 613 "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n", 614 man_id, chip_id); 615 return -ENODEV; 616 } 617 618 strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE); 619 620 return 0; 621 } 622 623 static int 624 w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id) 625 { 626 struct device *dev = &client->dev; 627 struct w83l786ng_data *data; 628 int i, err = 0; 629 u8 reg_tmp; 630 631 data = kzalloc(sizeof(struct w83l786ng_data), GFP_KERNEL); 632 if (!data) { 633 err = -ENOMEM; 634 goto exit; 635 } 636 637 i2c_set_clientdata(client, data); 638 mutex_init(&data->update_lock); 639 640 /* Initialize the chip */ 641 w83l786ng_init_client(client); 642 643 /* A few vars need to be filled upon startup */ 644 for (i = 0; i < 2; i++) { 645 data->fan_min[i] = w83l786ng_read_value(client, 646 W83L786NG_REG_FAN_MIN(i)); 647 } 648 649 /* Update the fan divisor */ 650 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 651 data->fan_div[0] = reg_tmp & 0x07; 652 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 653 654 /* Register sysfs hooks */ 655 if ((err = sysfs_create_group(&client->dev.kobj, &w83l786ng_group))) 656 goto exit_remove; 657 658 data->hwmon_dev = hwmon_device_register(dev); 659 if (IS_ERR(data->hwmon_dev)) { 660 err = PTR_ERR(data->hwmon_dev); 661 goto exit_remove; 662 } 663 664 return 0; 665 666 /* Unregister sysfs hooks */ 667 668 exit_remove: 669 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); 670 kfree(data); 671 exit: 672 return err; 673 } 674 675 static int 676 w83l786ng_remove(struct i2c_client *client) 677 { 678 struct w83l786ng_data *data = i2c_get_clientdata(client); 679 680 hwmon_device_unregister(data->hwmon_dev); 681 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); 682 683 kfree(data); 684 685 return 0; 686 } 687 688 static void 689 w83l786ng_init_client(struct i2c_client *client) 690 { 691 u8 tmp; 692 693 if (reset) 694 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80); 695 696 /* Start monitoring */ 697 tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG); 698 if (!(tmp & 0x01)) 699 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01); 700 } 701 702 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev) 703 { 704 struct i2c_client *client = to_i2c_client(dev); 705 struct w83l786ng_data *data = i2c_get_clientdata(client); 706 int i, j; 707 u8 reg_tmp, pwmcfg; 708 709 mutex_lock(&data->update_lock); 710 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 711 || !data->valid) { 712 dev_dbg(&client->dev, "Updating w83l786ng data.\n"); 713 714 /* Update the voltages measured value and limits */ 715 for (i = 0; i < 3; i++) { 716 data->in[i] = w83l786ng_read_value(client, 717 W83L786NG_REG_IN(i)); 718 data->in_min[i] = w83l786ng_read_value(client, 719 W83L786NG_REG_IN_MIN(i)); 720 data->in_max[i] = w83l786ng_read_value(client, 721 W83L786NG_REG_IN_MAX(i)); 722 } 723 724 /* Update the fan counts and limits */ 725 for (i = 0; i < 2; i++) { 726 data->fan[i] = w83l786ng_read_value(client, 727 W83L786NG_REG_FAN(i)); 728 data->fan_min[i] = w83l786ng_read_value(client, 729 W83L786NG_REG_FAN_MIN(i)); 730 } 731 732 /* Update the fan divisor */ 733 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 734 data->fan_div[0] = reg_tmp & 0x07; 735 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 736 737 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 738 for (i = 0; i < 2; i++) { 739 data->pwm_mode[i] = 740 ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1) 741 ? 0 : 1; 742 data->pwm_enable[i] = 743 ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 2) + 1; 744 data->pwm[i] = w83l786ng_read_value(client, 745 W83L786NG_REG_PWM[i]); 746 } 747 748 749 /* Update the temperature sensors */ 750 for (i = 0; i < 2; i++) { 751 for (j = 0; j < 3; j++) { 752 data->temp[i][j] = w83l786ng_read_value(client, 753 W83L786NG_REG_TEMP[i][j]); 754 } 755 } 756 757 /* Update Smart Fan I/II tolerance */ 758 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE); 759 data->tolerance[0] = reg_tmp & 0x0f; 760 data->tolerance[1] = (reg_tmp >> 4) & 0x0f; 761 762 data->last_updated = jiffies; 763 data->valid = 1; 764 765 } 766 767 mutex_unlock(&data->update_lock); 768 769 return data; 770 } 771 772 static int __init 773 sensors_w83l786ng_init(void) 774 { 775 return i2c_add_driver(&w83l786ng_driver); 776 } 777 778 static void __exit 779 sensors_w83l786ng_exit(void) 780 { 781 i2c_del_driver(&w83l786ng_driver); 782 } 783 784 MODULE_AUTHOR("Kevin Lo"); 785 MODULE_DESCRIPTION("w83l786ng driver"); 786 MODULE_LICENSE("GPL"); 787 788 module_init(sensors_w83l786ng_init); 789 module_exit(sensors_w83l786ng_exit); 790