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 i2c_client client; 125 struct device *hwmon_dev; 126 struct mutex update_lock; 127 char valid; /* !=0 if following fields are valid */ 128 unsigned long last_updated; /* In jiffies */ 129 unsigned long last_nonvolatile; /* In jiffies, last time we update the 130 nonvolatile registers */ 131 132 u8 in[3]; 133 u8 in_max[3]; 134 u8 in_min[3]; 135 u8 fan[2]; 136 u8 fan_div[2]; 137 u8 fan_min[2]; 138 u8 temp_type[2]; 139 u8 temp[2][3]; 140 u8 pwm[2]; 141 u8 pwm_mode[2]; /* 0->DC variable voltage 142 1->PWM variable duty cycle */ 143 144 u8 pwm_enable[2]; /* 1->manual 145 2->thermal cruise (also called SmartFan I) */ 146 u8 tolerance[2]; 147 }; 148 149 static int w83l786ng_attach_adapter(struct i2c_adapter *adapter); 150 static int w83l786ng_detect(struct i2c_adapter *adapter, int address, int kind); 151 static int w83l786ng_detach_client(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 struct i2c_driver w83l786ng_driver = { 156 .driver = { 157 .name = "w83l786ng", 158 }, 159 .attach_adapter = w83l786ng_attach_adapter, 160 .detach_client = w83l786ng_detach_client, 161 }; 162 163 static u8 164 w83l786ng_read_value(struct i2c_client *client, u8 reg) 165 { 166 return i2c_smbus_read_byte_data(client, reg); 167 } 168 169 static int 170 w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value) 171 { 172 return i2c_smbus_write_byte_data(client, reg, value); 173 } 174 175 /* following are the sysfs callback functions */ 176 #define show_in_reg(reg) \ 177 static ssize_t \ 178 show_##reg(struct device *dev, struct device_attribute *attr, \ 179 char *buf) \ 180 { \ 181 int nr = to_sensor_dev_attr(attr)->index; \ 182 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 183 return sprintf(buf,"%d\n", IN_FROM_REG(data->reg[nr])); \ 184 } 185 186 show_in_reg(in) 187 show_in_reg(in_min) 188 show_in_reg(in_max) 189 190 #define store_in_reg(REG, reg) \ 191 static ssize_t \ 192 store_in_##reg (struct device *dev, struct device_attribute *attr, \ 193 const char *buf, size_t count) \ 194 { \ 195 int nr = to_sensor_dev_attr(attr)->index; \ 196 struct i2c_client *client = to_i2c_client(dev); \ 197 struct w83l786ng_data *data = i2c_get_clientdata(client); \ 198 unsigned long val = simple_strtoul(buf, NULL, 10); \ 199 mutex_lock(&data->update_lock); \ 200 data->in_##reg[nr] = IN_TO_REG(val); \ 201 w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \ 202 data->in_##reg[nr]); \ 203 mutex_unlock(&data->update_lock); \ 204 return count; \ 205 } 206 207 store_in_reg(MIN, min) 208 store_in_reg(MAX, max) 209 210 static struct sensor_device_attribute sda_in_input[] = { 211 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0), 212 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1), 213 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2), 214 }; 215 216 static struct sensor_device_attribute sda_in_min[] = { 217 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0), 218 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1), 219 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2), 220 }; 221 222 static struct sensor_device_attribute sda_in_max[] = { 223 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0), 224 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1), 225 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2), 226 }; 227 228 #define show_fan_reg(reg) \ 229 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 230 char *buf) \ 231 { \ 232 int nr = to_sensor_dev_attr(attr)->index; \ 233 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 234 return sprintf(buf,"%d\n", \ 235 FAN_FROM_REG(data->fan[nr], DIV_FROM_REG(data->fan_div[nr]))); \ 236 } 237 238 show_fan_reg(fan); 239 show_fan_reg(fan_min); 240 241 static ssize_t 242 store_fan_min(struct device *dev, struct device_attribute *attr, 243 const char *buf, size_t count) 244 { 245 int nr = to_sensor_dev_attr(attr)->index; 246 struct i2c_client *client = to_i2c_client(dev); 247 struct w83l786ng_data *data = i2c_get_clientdata(client); 248 u32 val; 249 250 val = simple_strtoul(buf, NULL, 10); 251 mutex_lock(&data->update_lock); 252 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 253 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 254 data->fan_min[nr]); 255 mutex_unlock(&data->update_lock); 256 257 return count; 258 } 259 260 static ssize_t 261 show_fan_div(struct device *dev, struct device_attribute *attr, 262 char *buf) 263 { 264 int nr = to_sensor_dev_attr(attr)->index; 265 struct w83l786ng_data *data = w83l786ng_update_device(dev); 266 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr])); 267 } 268 269 /* Note: we save and restore the fan minimum here, because its value is 270 determined in part by the fan divisor. This follows the principle of 271 least surprise; the user doesn't expect the fan minimum to change just 272 because the divisor changed. */ 273 static ssize_t 274 store_fan_div(struct device *dev, struct device_attribute *attr, 275 const char *buf, size_t count) 276 { 277 int nr = to_sensor_dev_attr(attr)->index; 278 struct i2c_client *client = to_i2c_client(dev); 279 struct w83l786ng_data *data = i2c_get_clientdata(client); 280 281 unsigned long min; 282 u8 tmp_fan_div; 283 u8 fan_div_reg; 284 u8 keep_mask = 0; 285 u8 new_shift = 0; 286 287 /* Save fan_min */ 288 mutex_lock(&data->update_lock); 289 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 290 291 data->fan_div[nr] = DIV_TO_REG(simple_strtoul(buf, NULL, 10)); 292 293 switch (nr) { 294 case 0: 295 keep_mask = 0xf8; 296 new_shift = 0; 297 break; 298 case 1: 299 keep_mask = 0x8f; 300 new_shift = 4; 301 break; 302 } 303 304 fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV) 305 & keep_mask; 306 307 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask; 308 309 w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV, 310 fan_div_reg | tmp_fan_div); 311 312 /* Restore fan_min */ 313 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 314 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 315 data->fan_min[nr]); 316 mutex_unlock(&data->update_lock); 317 318 return count; 319 } 320 321 static struct sensor_device_attribute sda_fan_input[] = { 322 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0), 323 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1), 324 }; 325 326 static struct sensor_device_attribute sda_fan_min[] = { 327 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, 328 store_fan_min, 0), 329 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, 330 store_fan_min, 1), 331 }; 332 333 static struct sensor_device_attribute sda_fan_div[] = { 334 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div, 335 store_fan_div, 0), 336 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div, 337 store_fan_div, 1), 338 }; 339 340 341 /* read/write the temperature, includes measured value and limits */ 342 343 static ssize_t 344 show_temp(struct device *dev, struct device_attribute *attr, char *buf) 345 { 346 struct sensor_device_attribute_2 *sensor_attr = 347 to_sensor_dev_attr_2(attr); 348 int nr = sensor_attr->nr; 349 int index = sensor_attr->index; 350 struct w83l786ng_data *data = w83l786ng_update_device(dev); 351 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index])); 352 } 353 354 static ssize_t 355 store_temp(struct device *dev, struct device_attribute *attr, 356 const char *buf, size_t count) 357 { 358 struct sensor_device_attribute_2 *sensor_attr = 359 to_sensor_dev_attr_2(attr); 360 int nr = sensor_attr->nr; 361 int index = sensor_attr->index; 362 struct i2c_client *client = to_i2c_client(dev); 363 struct w83l786ng_data *data = i2c_get_clientdata(client); 364 s32 val; 365 366 val = simple_strtol(buf, NULL, 10); 367 mutex_lock(&data->update_lock); 368 data->temp[nr][index] = TEMP_TO_REG(val); 369 w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index], 370 data->temp[nr][index]); 371 mutex_unlock(&data->update_lock); 372 373 return count; 374 } 375 376 static struct sensor_device_attribute_2 sda_temp_input[] = { 377 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0), 378 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0), 379 }; 380 381 static struct sensor_device_attribute_2 sda_temp_max[] = { 382 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, 383 show_temp, store_temp, 0, 1), 384 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, 385 show_temp, store_temp, 1, 1), 386 }; 387 388 static struct sensor_device_attribute_2 sda_temp_max_hyst[] = { 389 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR, 390 show_temp, store_temp, 0, 2), 391 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR, 392 show_temp, store_temp, 1, 2), 393 }; 394 395 #define show_pwm_reg(reg) \ 396 static ssize_t show_##reg (struct device *dev, struct device_attribute *attr, \ 397 char *buf) \ 398 { \ 399 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 400 int nr = to_sensor_dev_attr(attr)->index; \ 401 return sprintf(buf, "%d\n", data->reg[nr]); \ 402 } 403 404 show_pwm_reg(pwm_mode) 405 show_pwm_reg(pwm_enable) 406 show_pwm_reg(pwm) 407 408 static ssize_t 409 store_pwm_mode(struct device *dev, struct device_attribute *attr, 410 const char *buf, size_t count) 411 { 412 int nr = to_sensor_dev_attr(attr)->index; 413 struct i2c_client *client = to_i2c_client(dev); 414 struct w83l786ng_data *data = i2c_get_clientdata(client); 415 u32 val = simple_strtoul(buf, NULL, 10); 416 u8 reg; 417 418 if (val > 1) 419 return -EINVAL; 420 mutex_lock(&data->update_lock); 421 data->pwm_mode[nr] = val; 422 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 423 reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]); 424 if (!val) 425 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr]; 426 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); 427 mutex_unlock(&data->update_lock); 428 return count; 429 } 430 431 static ssize_t 432 store_pwm(struct device *dev, struct device_attribute *attr, 433 const char *buf, size_t count) 434 { 435 int nr = to_sensor_dev_attr(attr)->index; 436 struct i2c_client *client = to_i2c_client(dev); 437 struct w83l786ng_data *data = i2c_get_clientdata(client); 438 u32 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 255); 439 440 mutex_lock(&data->update_lock); 441 data->pwm[nr] = val; 442 w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val); 443 mutex_unlock(&data->update_lock); 444 return count; 445 } 446 447 static ssize_t 448 store_pwm_enable(struct device *dev, struct device_attribute *attr, 449 const char *buf, size_t count) 450 { 451 int nr = to_sensor_dev_attr(attr)->index; 452 struct i2c_client *client = to_i2c_client(dev); 453 struct w83l786ng_data *data = i2c_get_clientdata(client); 454 u32 val = simple_strtoul(buf, NULL, 10); 455 456 u8 reg; 457 458 if (!val || (val > 2)) /* only modes 1 and 2 are supported */ 459 return -EINVAL; 460 461 mutex_lock(&data->update_lock); 462 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 463 data->pwm_enable[nr] = val; 464 reg &= ~(0x02 << W83L786NG_PWM_ENABLE_SHIFT[nr]); 465 reg |= (val - 1) << W83L786NG_PWM_ENABLE_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 struct sensor_device_attribute sda_pwm[] = { 472 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0), 473 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1), 474 }; 475 476 static struct sensor_device_attribute sda_pwm_mode[] = { 477 SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 478 store_pwm_mode, 0), 479 SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 480 store_pwm_mode, 1), 481 }; 482 483 static struct sensor_device_attribute sda_pwm_enable[] = { 484 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 485 store_pwm_enable, 0), 486 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 487 store_pwm_enable, 1), 488 }; 489 490 /* For Smart Fan I/Thermal Cruise and Smart Fan II */ 491 static ssize_t 492 show_tolerance(struct device *dev, struct device_attribute *attr, char *buf) 493 { 494 int nr = to_sensor_dev_attr(attr)->index; 495 struct w83l786ng_data *data = w83l786ng_update_device(dev); 496 return sprintf(buf, "%ld\n", (long)data->tolerance[nr]); 497 } 498 499 static ssize_t 500 store_tolerance(struct device *dev, struct device_attribute *attr, 501 const char *buf, size_t count) 502 { 503 int nr = to_sensor_dev_attr(attr)->index; 504 struct i2c_client *client = to_i2c_client(dev); 505 struct w83l786ng_data *data = i2c_get_clientdata(client); 506 u32 val; 507 u8 tol_tmp, tol_mask; 508 509 val = simple_strtoul(buf, NULL, 10); 510 511 mutex_lock(&data->update_lock); 512 tol_mask = w83l786ng_read_value(client, 513 W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0); 514 tol_tmp = SENSORS_LIMIT(val, 0, 15); 515 tol_tmp &= 0x0f; 516 data->tolerance[nr] = tol_tmp; 517 if (nr == 1) { 518 tol_tmp <<= 4; 519 } 520 521 w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE, 522 tol_mask | tol_tmp); 523 mutex_unlock(&data->update_lock); 524 return count; 525 } 526 527 static struct sensor_device_attribute sda_tolerance[] = { 528 SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO, 529 show_tolerance, store_tolerance, 0), 530 SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO, 531 show_tolerance, store_tolerance, 1), 532 }; 533 534 535 #define IN_UNIT_ATTRS(X) \ 536 &sda_in_input[X].dev_attr.attr, \ 537 &sda_in_min[X].dev_attr.attr, \ 538 &sda_in_max[X].dev_attr.attr 539 540 #define FAN_UNIT_ATTRS(X) \ 541 &sda_fan_input[X].dev_attr.attr, \ 542 &sda_fan_min[X].dev_attr.attr, \ 543 &sda_fan_div[X].dev_attr.attr 544 545 #define TEMP_UNIT_ATTRS(X) \ 546 &sda_temp_input[X].dev_attr.attr, \ 547 &sda_temp_max[X].dev_attr.attr, \ 548 &sda_temp_max_hyst[X].dev_attr.attr 549 550 #define PWM_UNIT_ATTRS(X) \ 551 &sda_pwm[X].dev_attr.attr, \ 552 &sda_pwm_mode[X].dev_attr.attr, \ 553 &sda_pwm_enable[X].dev_attr.attr 554 555 #define TOLERANCE_UNIT_ATTRS(X) \ 556 &sda_tolerance[X].dev_attr.attr 557 558 static struct attribute *w83l786ng_attributes[] = { 559 IN_UNIT_ATTRS(0), 560 IN_UNIT_ATTRS(1), 561 IN_UNIT_ATTRS(2), 562 FAN_UNIT_ATTRS(0), 563 FAN_UNIT_ATTRS(1), 564 TEMP_UNIT_ATTRS(0), 565 TEMP_UNIT_ATTRS(1), 566 PWM_UNIT_ATTRS(0), 567 PWM_UNIT_ATTRS(1), 568 TOLERANCE_UNIT_ATTRS(0), 569 TOLERANCE_UNIT_ATTRS(1), 570 NULL 571 }; 572 573 static const struct attribute_group w83l786ng_group = { 574 .attrs = w83l786ng_attributes, 575 }; 576 577 static int 578 w83l786ng_attach_adapter(struct i2c_adapter *adapter) 579 { 580 if (!(adapter->class & I2C_CLASS_HWMON)) 581 return 0; 582 return i2c_probe(adapter, &addr_data, w83l786ng_detect); 583 } 584 585 static int 586 w83l786ng_detect(struct i2c_adapter *adapter, int address, int kind) 587 { 588 struct i2c_client *client; 589 struct device *dev; 590 struct w83l786ng_data *data; 591 int i, err = 0; 592 u8 reg_tmp; 593 594 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { 595 goto exit; 596 } 597 598 /* OK. For now, we presume we have a valid client. We now create the 599 client structure, even though we cannot fill it completely yet. 600 But it allows us to access w83l786ng_{read,write}_value. */ 601 602 if (!(data = kzalloc(sizeof(struct w83l786ng_data), GFP_KERNEL))) { 603 err = -ENOMEM; 604 goto exit; 605 } 606 607 client = &data->client; 608 dev = &client->dev; 609 i2c_set_clientdata(client, data); 610 client->addr = address; 611 client->adapter = adapter; 612 client->driver = &w83l786ng_driver; 613 614 /* 615 * Now we do the remaining detection. A negative kind means that 616 * the driver was loaded with no force parameter (default), so we 617 * must both detect and identify the chip (actually there is only 618 * one possible kind of chip for now, W83L786NG). A zero kind means 619 * that the driver was loaded with the force parameter, the detection 620 * step shall be skipped. A positive kind means that the driver 621 * was loaded with the force parameter and a given kind of chip is 622 * requested, so both the detection and the identification steps 623 * are skipped. 624 */ 625 if (kind < 0) { /* detection */ 626 if (((w83l786ng_read_value(client, 627 W83L786NG_REG_CONFIG) & 0x80) != 0x00)) { 628 dev_dbg(&adapter->dev, 629 "W83L786NG detection failed at 0x%02x.\n", 630 address); 631 goto exit_free; 632 } 633 } 634 635 if (kind <= 0) { /* identification */ 636 u16 man_id; 637 u8 chip_id; 638 639 man_id = (w83l786ng_read_value(client, 640 W83L786NG_REG_MAN_ID1) << 8) + 641 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2); 642 chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID); 643 644 if (man_id == 0x5CA3) { /* Winbond */ 645 if (chip_id == 0x80) { /* W83L786NG */ 646 kind = w83l786ng; 647 } 648 } 649 650 if (kind <= 0) { /* identification failed */ 651 dev_info(&adapter->dev, 652 "Unsupported chip (man_id=0x%04X, " 653 "chip_id=0x%02X).\n", man_id, chip_id); 654 goto exit_free; 655 } 656 } 657 658 /* Fill in the remaining client fields and put into the global list */ 659 strlcpy(client->name, "w83l786ng", I2C_NAME_SIZE); 660 mutex_init(&data->update_lock); 661 662 /* Tell the I2C layer a new client has arrived */ 663 if ((err = i2c_attach_client(client))) 664 goto exit_free; 665 666 /* Initialize the chip */ 667 w83l786ng_init_client(client); 668 669 /* A few vars need to be filled upon startup */ 670 for (i = 0; i < 2; i++) { 671 data->fan_min[i] = w83l786ng_read_value(client, 672 W83L786NG_REG_FAN_MIN(i)); 673 } 674 675 /* Update the fan divisor */ 676 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 677 data->fan_div[0] = reg_tmp & 0x07; 678 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 679 680 /* Register sysfs hooks */ 681 if ((err = sysfs_create_group(&client->dev.kobj, &w83l786ng_group))) 682 goto exit_remove; 683 684 data->hwmon_dev = hwmon_device_register(dev); 685 if (IS_ERR(data->hwmon_dev)) { 686 err = PTR_ERR(data->hwmon_dev); 687 goto exit_remove; 688 } 689 690 return 0; 691 692 /* Unregister sysfs hooks */ 693 694 exit_remove: 695 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); 696 i2c_detach_client(client); 697 exit_free: 698 kfree(data); 699 exit: 700 return err; 701 } 702 703 static int 704 w83l786ng_detach_client(struct i2c_client *client) 705 { 706 struct w83l786ng_data *data = i2c_get_clientdata(client); 707 int err; 708 709 hwmon_device_unregister(data->hwmon_dev); 710 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); 711 712 if ((err = i2c_detach_client(client))) 713 return err; 714 715 kfree(data); 716 717 return 0; 718 } 719 720 static void 721 w83l786ng_init_client(struct i2c_client *client) 722 { 723 u8 tmp; 724 725 if (reset) 726 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80); 727 728 /* Start monitoring */ 729 tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG); 730 if (!(tmp & 0x01)) 731 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01); 732 } 733 734 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev) 735 { 736 struct i2c_client *client = to_i2c_client(dev); 737 struct w83l786ng_data *data = i2c_get_clientdata(client); 738 int i, j; 739 u8 reg_tmp, pwmcfg; 740 741 mutex_lock(&data->update_lock); 742 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 743 || !data->valid) { 744 dev_dbg(&client->dev, "Updating w83l786ng data.\n"); 745 746 /* Update the voltages measured value and limits */ 747 for (i = 0; i < 3; i++) { 748 data->in[i] = w83l786ng_read_value(client, 749 W83L786NG_REG_IN(i)); 750 data->in_min[i] = w83l786ng_read_value(client, 751 W83L786NG_REG_IN_MIN(i)); 752 data->in_max[i] = w83l786ng_read_value(client, 753 W83L786NG_REG_IN_MAX(i)); 754 } 755 756 /* Update the fan counts and limits */ 757 for (i = 0; i < 2; i++) { 758 data->fan[i] = w83l786ng_read_value(client, 759 W83L786NG_REG_FAN(i)); 760 data->fan_min[i] = w83l786ng_read_value(client, 761 W83L786NG_REG_FAN_MIN(i)); 762 } 763 764 /* Update the fan divisor */ 765 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 766 data->fan_div[0] = reg_tmp & 0x07; 767 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 768 769 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 770 for (i = 0; i < 2; i++) { 771 data->pwm_mode[i] = 772 ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1) 773 ? 0 : 1; 774 data->pwm_enable[i] = 775 ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 2) + 1; 776 data->pwm[i] = w83l786ng_read_value(client, 777 W83L786NG_REG_PWM[i]); 778 } 779 780 781 /* Update the temperature sensors */ 782 for (i = 0; i < 2; i++) { 783 for (j = 0; j < 3; j++) { 784 data->temp[i][j] = w83l786ng_read_value(client, 785 W83L786NG_REG_TEMP[i][j]); 786 } 787 } 788 789 /* Update Smart Fan I/II tolerance */ 790 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE); 791 data->tolerance[0] = reg_tmp & 0x0f; 792 data->tolerance[1] = (reg_tmp >> 4) & 0x0f; 793 794 data->last_updated = jiffies; 795 data->valid = 1; 796 797 } 798 799 mutex_unlock(&data->update_lock); 800 801 return data; 802 } 803 804 static int __init 805 sensors_w83l786ng_init(void) 806 { 807 return i2c_add_driver(&w83l786ng_driver); 808 } 809 810 static void __exit 811 sensors_w83l786ng_exit(void) 812 { 813 i2c_del_driver(&w83l786ng_driver); 814 } 815 816 MODULE_AUTHOR("Kevin Lo"); 817 MODULE_DESCRIPTION("w83l786ng driver"); 818 MODULE_LICENSE("GPL"); 819 820 module_init(sensors_w83l786ng_init); 821 module_exit(sensors_w83l786ng_exit); 822