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 I2C_CLIENT_INSMOD_1(w83l786ng); 42 43 static int 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 ? (val)+0x100*1000 \ 99 : (val)) / 1000, 0, 0xff)) 100 #define TEMP_FROM_REG(val) (((val) & 0x80 ? (val)-0x100 : (val)) * 1000) 101 102 /* The analog voltage inputs have 8mV LSB. Since the sysfs output is 103 in mV as would be measured on the chip input pin, need to just 104 multiply/divide by 8 to translate from/to register values. */ 105 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 4) / 8), 0, 255)) 106 #define IN_FROM_REG(val) ((val) * 8) 107 108 #define DIV_FROM_REG(val) (1 << (val)) 109 110 static inline u8 111 DIV_TO_REG(long val) 112 { 113 int i; 114 val = SENSORS_LIMIT(val, 1, 128) >> 1; 115 for (i = 0; i < 7; i++) { 116 if (val == 0) 117 break; 118 val >>= 1; 119 } 120 return ((u8) i); 121 } 122 123 struct w83l786ng_data { 124 struct device *hwmon_dev; 125 struct mutex update_lock; 126 char valid; /* !=0 if following fields are valid */ 127 unsigned long last_updated; /* In jiffies */ 128 unsigned long last_nonvolatile; /* In jiffies, last time we update the 129 nonvolatile registers */ 130 131 u8 in[3]; 132 u8 in_max[3]; 133 u8 in_min[3]; 134 u8 fan[2]; 135 u8 fan_div[2]; 136 u8 fan_min[2]; 137 u8 temp_type[2]; 138 u8 temp[2][3]; 139 u8 pwm[2]; 140 u8 pwm_mode[2]; /* 0->DC variable voltage 141 1->PWM variable duty cycle */ 142 143 u8 pwm_enable[2]; /* 1->manual 144 2->thermal cruise (also called SmartFan I) */ 145 u8 tolerance[2]; 146 }; 147 148 static int w83l786ng_probe(struct i2c_client *client, 149 const struct i2c_device_id *id); 150 static int w83l786ng_detect(struct i2c_client *client, int kind, 151 struct i2c_board_info *info); 152 static int w83l786ng_remove(struct i2c_client *client); 153 static void w83l786ng_init_client(struct i2c_client *client); 154 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev); 155 156 static const struct i2c_device_id w83l786ng_id[] = { 157 { "w83l786ng", w83l786ng }, 158 { } 159 }; 160 MODULE_DEVICE_TABLE(i2c, w83l786ng_id); 161 162 static struct i2c_driver w83l786ng_driver = { 163 .class = I2C_CLASS_HWMON, 164 .driver = { 165 .name = "w83l786ng", 166 }, 167 .probe = w83l786ng_probe, 168 .remove = w83l786ng_remove, 169 .id_table = w83l786ng_id, 170 .detect = w83l786ng_detect, 171 .address_data = &addr_data, 172 }; 173 174 static u8 175 w83l786ng_read_value(struct i2c_client *client, u8 reg) 176 { 177 return i2c_smbus_read_byte_data(client, reg); 178 } 179 180 static int 181 w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value) 182 { 183 return i2c_smbus_write_byte_data(client, reg, value); 184 } 185 186 /* following are the sysfs callback functions */ 187 #define show_in_reg(reg) \ 188 static ssize_t \ 189 show_##reg(struct device *dev, struct device_attribute *attr, \ 190 char *buf) \ 191 { \ 192 int nr = to_sensor_dev_attr(attr)->index; \ 193 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 194 return sprintf(buf,"%d\n", IN_FROM_REG(data->reg[nr])); \ 195 } 196 197 show_in_reg(in) 198 show_in_reg(in_min) 199 show_in_reg(in_max) 200 201 #define store_in_reg(REG, reg) \ 202 static ssize_t \ 203 store_in_##reg (struct device *dev, struct device_attribute *attr, \ 204 const char *buf, size_t count) \ 205 { \ 206 int nr = to_sensor_dev_attr(attr)->index; \ 207 struct i2c_client *client = to_i2c_client(dev); \ 208 struct w83l786ng_data *data = i2c_get_clientdata(client); \ 209 unsigned long val = simple_strtoul(buf, NULL, 10); \ 210 mutex_lock(&data->update_lock); \ 211 data->in_##reg[nr] = IN_TO_REG(val); \ 212 w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \ 213 data->in_##reg[nr]); \ 214 mutex_unlock(&data->update_lock); \ 215 return count; \ 216 } 217 218 store_in_reg(MIN, min) 219 store_in_reg(MAX, max) 220 221 static struct sensor_device_attribute sda_in_input[] = { 222 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0), 223 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1), 224 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2), 225 }; 226 227 static struct sensor_device_attribute sda_in_min[] = { 228 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0), 229 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1), 230 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2), 231 }; 232 233 static struct sensor_device_attribute sda_in_max[] = { 234 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0), 235 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1), 236 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2), 237 }; 238 239 #define show_fan_reg(reg) \ 240 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 241 char *buf) \ 242 { \ 243 int nr = to_sensor_dev_attr(attr)->index; \ 244 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 245 return sprintf(buf,"%d\n", \ 246 FAN_FROM_REG(data->fan[nr], DIV_FROM_REG(data->fan_div[nr]))); \ 247 } 248 249 show_fan_reg(fan); 250 show_fan_reg(fan_min); 251 252 static ssize_t 253 store_fan_min(struct device *dev, struct device_attribute *attr, 254 const char *buf, size_t count) 255 { 256 int nr = to_sensor_dev_attr(attr)->index; 257 struct i2c_client *client = to_i2c_client(dev); 258 struct w83l786ng_data *data = i2c_get_clientdata(client); 259 u32 val; 260 261 val = simple_strtoul(buf, NULL, 10); 262 mutex_lock(&data->update_lock); 263 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 264 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 265 data->fan_min[nr]); 266 mutex_unlock(&data->update_lock); 267 268 return count; 269 } 270 271 static ssize_t 272 show_fan_div(struct device *dev, struct device_attribute *attr, 273 char *buf) 274 { 275 int nr = to_sensor_dev_attr(attr)->index; 276 struct w83l786ng_data *data = w83l786ng_update_device(dev); 277 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr])); 278 } 279 280 /* Note: we save and restore the fan minimum here, because its value is 281 determined in part by the fan divisor. This follows the principle of 282 least surprise; the user doesn't expect the fan minimum to change just 283 because the divisor changed. */ 284 static ssize_t 285 store_fan_div(struct device *dev, struct device_attribute *attr, 286 const char *buf, size_t count) 287 { 288 int nr = to_sensor_dev_attr(attr)->index; 289 struct i2c_client *client = to_i2c_client(dev); 290 struct w83l786ng_data *data = i2c_get_clientdata(client); 291 292 unsigned long min; 293 u8 tmp_fan_div; 294 u8 fan_div_reg; 295 u8 keep_mask = 0; 296 u8 new_shift = 0; 297 298 /* Save fan_min */ 299 mutex_lock(&data->update_lock); 300 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 301 302 data->fan_div[nr] = DIV_TO_REG(simple_strtoul(buf, NULL, 10)); 303 304 switch (nr) { 305 case 0: 306 keep_mask = 0xf8; 307 new_shift = 0; 308 break; 309 case 1: 310 keep_mask = 0x8f; 311 new_shift = 4; 312 break; 313 } 314 315 fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV) 316 & keep_mask; 317 318 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask; 319 320 w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV, 321 fan_div_reg | tmp_fan_div); 322 323 /* Restore fan_min */ 324 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 325 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 326 data->fan_min[nr]); 327 mutex_unlock(&data->update_lock); 328 329 return count; 330 } 331 332 static struct sensor_device_attribute sda_fan_input[] = { 333 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0), 334 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1), 335 }; 336 337 static struct sensor_device_attribute sda_fan_min[] = { 338 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, 339 store_fan_min, 0), 340 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, 341 store_fan_min, 1), 342 }; 343 344 static struct sensor_device_attribute sda_fan_div[] = { 345 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div, 346 store_fan_div, 0), 347 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div, 348 store_fan_div, 1), 349 }; 350 351 352 /* read/write the temperature, includes measured value and limits */ 353 354 static ssize_t 355 show_temp(struct device *dev, struct device_attribute *attr, char *buf) 356 { 357 struct sensor_device_attribute_2 *sensor_attr = 358 to_sensor_dev_attr_2(attr); 359 int nr = sensor_attr->nr; 360 int index = sensor_attr->index; 361 struct w83l786ng_data *data = w83l786ng_update_device(dev); 362 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index])); 363 } 364 365 static ssize_t 366 store_temp(struct device *dev, struct device_attribute *attr, 367 const char *buf, size_t count) 368 { 369 struct sensor_device_attribute_2 *sensor_attr = 370 to_sensor_dev_attr_2(attr); 371 int nr = sensor_attr->nr; 372 int index = sensor_attr->index; 373 struct i2c_client *client = to_i2c_client(dev); 374 struct w83l786ng_data *data = i2c_get_clientdata(client); 375 s32 val; 376 377 val = simple_strtol(buf, NULL, 10); 378 mutex_lock(&data->update_lock); 379 data->temp[nr][index] = TEMP_TO_REG(val); 380 w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index], 381 data->temp[nr][index]); 382 mutex_unlock(&data->update_lock); 383 384 return count; 385 } 386 387 static struct sensor_device_attribute_2 sda_temp_input[] = { 388 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0), 389 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0), 390 }; 391 392 static struct sensor_device_attribute_2 sda_temp_max[] = { 393 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, 394 show_temp, store_temp, 0, 1), 395 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, 396 show_temp, store_temp, 1, 1), 397 }; 398 399 static struct sensor_device_attribute_2 sda_temp_max_hyst[] = { 400 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR, 401 show_temp, store_temp, 0, 2), 402 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR, 403 show_temp, store_temp, 1, 2), 404 }; 405 406 #define show_pwm_reg(reg) \ 407 static ssize_t show_##reg (struct device *dev, struct device_attribute *attr, \ 408 char *buf) \ 409 { \ 410 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 411 int nr = to_sensor_dev_attr(attr)->index; \ 412 return sprintf(buf, "%d\n", data->reg[nr]); \ 413 } 414 415 show_pwm_reg(pwm_mode) 416 show_pwm_reg(pwm_enable) 417 show_pwm_reg(pwm) 418 419 static ssize_t 420 store_pwm_mode(struct device *dev, struct device_attribute *attr, 421 const char *buf, size_t count) 422 { 423 int nr = to_sensor_dev_attr(attr)->index; 424 struct i2c_client *client = to_i2c_client(dev); 425 struct w83l786ng_data *data = i2c_get_clientdata(client); 426 u32 val = simple_strtoul(buf, NULL, 10); 427 u8 reg; 428 429 if (val > 1) 430 return -EINVAL; 431 mutex_lock(&data->update_lock); 432 data->pwm_mode[nr] = val; 433 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 434 reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]); 435 if (!val) 436 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr]; 437 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); 438 mutex_unlock(&data->update_lock); 439 return count; 440 } 441 442 static ssize_t 443 store_pwm(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 u32 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 255); 450 451 mutex_lock(&data->update_lock); 452 data->pwm[nr] = val; 453 w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val); 454 mutex_unlock(&data->update_lock); 455 return count; 456 } 457 458 static ssize_t 459 store_pwm_enable(struct device *dev, struct device_attribute *attr, 460 const char *buf, size_t count) 461 { 462 int nr = to_sensor_dev_attr(attr)->index; 463 struct i2c_client *client = to_i2c_client(dev); 464 struct w83l786ng_data *data = i2c_get_clientdata(client); 465 u32 val = simple_strtoul(buf, NULL, 10); 466 467 u8 reg; 468 469 if (!val || (val > 2)) /* only modes 1 and 2 are supported */ 470 return -EINVAL; 471 472 mutex_lock(&data->update_lock); 473 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 474 data->pwm_enable[nr] = val; 475 reg &= ~(0x02 << W83L786NG_PWM_ENABLE_SHIFT[nr]); 476 reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr]; 477 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); 478 mutex_unlock(&data->update_lock); 479 return count; 480 } 481 482 static struct sensor_device_attribute sda_pwm[] = { 483 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0), 484 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1), 485 }; 486 487 static struct sensor_device_attribute sda_pwm_mode[] = { 488 SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 489 store_pwm_mode, 0), 490 SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 491 store_pwm_mode, 1), 492 }; 493 494 static struct sensor_device_attribute sda_pwm_enable[] = { 495 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 496 store_pwm_enable, 0), 497 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 498 store_pwm_enable, 1), 499 }; 500 501 /* For Smart Fan I/Thermal Cruise and Smart Fan II */ 502 static ssize_t 503 show_tolerance(struct device *dev, struct device_attribute *attr, char *buf) 504 { 505 int nr = to_sensor_dev_attr(attr)->index; 506 struct w83l786ng_data *data = w83l786ng_update_device(dev); 507 return sprintf(buf, "%ld\n", (long)data->tolerance[nr]); 508 } 509 510 static ssize_t 511 store_tolerance(struct device *dev, struct device_attribute *attr, 512 const char *buf, size_t count) 513 { 514 int nr = to_sensor_dev_attr(attr)->index; 515 struct i2c_client *client = to_i2c_client(dev); 516 struct w83l786ng_data *data = i2c_get_clientdata(client); 517 u32 val; 518 u8 tol_tmp, tol_mask; 519 520 val = simple_strtoul(buf, NULL, 10); 521 522 mutex_lock(&data->update_lock); 523 tol_mask = w83l786ng_read_value(client, 524 W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0); 525 tol_tmp = SENSORS_LIMIT(val, 0, 15); 526 tol_tmp &= 0x0f; 527 data->tolerance[nr] = tol_tmp; 528 if (nr == 1) { 529 tol_tmp <<= 4; 530 } 531 532 w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE, 533 tol_mask | tol_tmp); 534 mutex_unlock(&data->update_lock); 535 return count; 536 } 537 538 static struct sensor_device_attribute sda_tolerance[] = { 539 SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO, 540 show_tolerance, store_tolerance, 0), 541 SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO, 542 show_tolerance, store_tolerance, 1), 543 }; 544 545 546 #define IN_UNIT_ATTRS(X) \ 547 &sda_in_input[X].dev_attr.attr, \ 548 &sda_in_min[X].dev_attr.attr, \ 549 &sda_in_max[X].dev_attr.attr 550 551 #define FAN_UNIT_ATTRS(X) \ 552 &sda_fan_input[X].dev_attr.attr, \ 553 &sda_fan_min[X].dev_attr.attr, \ 554 &sda_fan_div[X].dev_attr.attr 555 556 #define TEMP_UNIT_ATTRS(X) \ 557 &sda_temp_input[X].dev_attr.attr, \ 558 &sda_temp_max[X].dev_attr.attr, \ 559 &sda_temp_max_hyst[X].dev_attr.attr 560 561 #define PWM_UNIT_ATTRS(X) \ 562 &sda_pwm[X].dev_attr.attr, \ 563 &sda_pwm_mode[X].dev_attr.attr, \ 564 &sda_pwm_enable[X].dev_attr.attr 565 566 #define TOLERANCE_UNIT_ATTRS(X) \ 567 &sda_tolerance[X].dev_attr.attr 568 569 static struct attribute *w83l786ng_attributes[] = { 570 IN_UNIT_ATTRS(0), 571 IN_UNIT_ATTRS(1), 572 IN_UNIT_ATTRS(2), 573 FAN_UNIT_ATTRS(0), 574 FAN_UNIT_ATTRS(1), 575 TEMP_UNIT_ATTRS(0), 576 TEMP_UNIT_ATTRS(1), 577 PWM_UNIT_ATTRS(0), 578 PWM_UNIT_ATTRS(1), 579 TOLERANCE_UNIT_ATTRS(0), 580 TOLERANCE_UNIT_ATTRS(1), 581 NULL 582 }; 583 584 static const struct attribute_group w83l786ng_group = { 585 .attrs = w83l786ng_attributes, 586 }; 587 588 static int 589 w83l786ng_detect(struct i2c_client *client, int kind, 590 struct i2c_board_info *info) 591 { 592 struct i2c_adapter *adapter = client->adapter; 593 594 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { 595 return -ENODEV; 596 } 597 598 /* 599 * Now we do the remaining detection. A negative kind means that 600 * the driver was loaded with no force parameter (default), so we 601 * must both detect and identify the chip (actually there is only 602 * one possible kind of chip for now, W83L786NG). A zero kind means 603 * that the driver was loaded with the force parameter, the detection 604 * step shall be skipped. A positive kind means that the driver 605 * was loaded with the force parameter and a given kind of chip is 606 * requested, so both the detection and the identification steps 607 * are skipped. 608 */ 609 if (kind < 0) { /* detection */ 610 if (((w83l786ng_read_value(client, 611 W83L786NG_REG_CONFIG) & 0x80) != 0x00)) { 612 dev_dbg(&adapter->dev, 613 "W83L786NG detection failed at 0x%02x.\n", 614 client->addr); 615 return -ENODEV; 616 } 617 } 618 619 if (kind <= 0) { /* identification */ 620 u16 man_id; 621 u8 chip_id; 622 623 man_id = (w83l786ng_read_value(client, 624 W83L786NG_REG_MAN_ID1) << 8) + 625 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2); 626 chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID); 627 628 if (man_id == 0x5CA3) { /* Winbond */ 629 if (chip_id == 0x80) { /* W83L786NG */ 630 kind = w83l786ng; 631 } 632 } 633 634 if (kind <= 0) { /* identification failed */ 635 dev_info(&adapter->dev, 636 "Unsupported chip (man_id=0x%04X, " 637 "chip_id=0x%02X).\n", man_id, chip_id); 638 return -ENODEV; 639 } 640 } 641 642 strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE); 643 644 return 0; 645 } 646 647 static int 648 w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id) 649 { 650 struct device *dev = &client->dev; 651 struct w83l786ng_data *data; 652 int i, err = 0; 653 u8 reg_tmp; 654 655 data = kzalloc(sizeof(struct w83l786ng_data), GFP_KERNEL); 656 if (!data) { 657 err = -ENOMEM; 658 goto exit; 659 } 660 661 i2c_set_clientdata(client, data); 662 mutex_init(&data->update_lock); 663 664 /* Initialize the chip */ 665 w83l786ng_init_client(client); 666 667 /* A few vars need to be filled upon startup */ 668 for (i = 0; i < 2; i++) { 669 data->fan_min[i] = w83l786ng_read_value(client, 670 W83L786NG_REG_FAN_MIN(i)); 671 } 672 673 /* Update the fan divisor */ 674 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 675 data->fan_div[0] = reg_tmp & 0x07; 676 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 677 678 /* Register sysfs hooks */ 679 if ((err = sysfs_create_group(&client->dev.kobj, &w83l786ng_group))) 680 goto exit_remove; 681 682 data->hwmon_dev = hwmon_device_register(dev); 683 if (IS_ERR(data->hwmon_dev)) { 684 err = PTR_ERR(data->hwmon_dev); 685 goto exit_remove; 686 } 687 688 return 0; 689 690 /* Unregister sysfs hooks */ 691 692 exit_remove: 693 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); 694 kfree(data); 695 exit: 696 return err; 697 } 698 699 static int 700 w83l786ng_remove(struct i2c_client *client) 701 { 702 struct w83l786ng_data *data = i2c_get_clientdata(client); 703 704 hwmon_device_unregister(data->hwmon_dev); 705 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); 706 707 kfree(data); 708 709 return 0; 710 } 711 712 static void 713 w83l786ng_init_client(struct i2c_client *client) 714 { 715 u8 tmp; 716 717 if (reset) 718 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80); 719 720 /* Start monitoring */ 721 tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG); 722 if (!(tmp & 0x01)) 723 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01); 724 } 725 726 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev) 727 { 728 struct i2c_client *client = to_i2c_client(dev); 729 struct w83l786ng_data *data = i2c_get_clientdata(client); 730 int i, j; 731 u8 reg_tmp, pwmcfg; 732 733 mutex_lock(&data->update_lock); 734 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 735 || !data->valid) { 736 dev_dbg(&client->dev, "Updating w83l786ng data.\n"); 737 738 /* Update the voltages measured value and limits */ 739 for (i = 0; i < 3; i++) { 740 data->in[i] = w83l786ng_read_value(client, 741 W83L786NG_REG_IN(i)); 742 data->in_min[i] = w83l786ng_read_value(client, 743 W83L786NG_REG_IN_MIN(i)); 744 data->in_max[i] = w83l786ng_read_value(client, 745 W83L786NG_REG_IN_MAX(i)); 746 } 747 748 /* Update the fan counts and limits */ 749 for (i = 0; i < 2; i++) { 750 data->fan[i] = w83l786ng_read_value(client, 751 W83L786NG_REG_FAN(i)); 752 data->fan_min[i] = w83l786ng_read_value(client, 753 W83L786NG_REG_FAN_MIN(i)); 754 } 755 756 /* Update the fan divisor */ 757 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 758 data->fan_div[0] = reg_tmp & 0x07; 759 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 760 761 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 762 for (i = 0; i < 2; i++) { 763 data->pwm_mode[i] = 764 ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1) 765 ? 0 : 1; 766 data->pwm_enable[i] = 767 ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 2) + 1; 768 data->pwm[i] = w83l786ng_read_value(client, 769 W83L786NG_REG_PWM[i]); 770 } 771 772 773 /* Update the temperature sensors */ 774 for (i = 0; i < 2; i++) { 775 for (j = 0; j < 3; j++) { 776 data->temp[i][j] = w83l786ng_read_value(client, 777 W83L786NG_REG_TEMP[i][j]); 778 } 779 } 780 781 /* Update Smart Fan I/II tolerance */ 782 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE); 783 data->tolerance[0] = reg_tmp & 0x0f; 784 data->tolerance[1] = (reg_tmp >> 4) & 0x0f; 785 786 data->last_updated = jiffies; 787 data->valid = 1; 788 789 } 790 791 mutex_unlock(&data->update_lock); 792 793 return data; 794 } 795 796 static int __init 797 sensors_w83l786ng_init(void) 798 { 799 return i2c_add_driver(&w83l786ng_driver); 800 } 801 802 static void __exit 803 sensors_w83l786ng_exit(void) 804 { 805 i2c_del_driver(&w83l786ng_driver); 806 } 807 808 MODULE_AUTHOR("Kevin Lo"); 809 MODULE_DESCRIPTION("w83l786ng driver"); 810 MODULE_LICENSE("GPL"); 811 812 module_init(sensors_w83l786ng_init); 813 module_exit(sensors_w83l786ng_exit); 814