1/* 2 w83781d.c - Part of lm_sensors, Linux kernel modules for hardware 3 monitoring 4 Copyright (c) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>, 5 Philip Edelbrock <phil@netroedge.com>, 6 and Mark Studebaker <mdsxyz123@yahoo.com> 7 Copyright (c) 2007 Jean Delvare <khali@linux-fr.org> 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22*/ 23 24/* 25 Supports following chips: 26 27 Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA 28 as99127f 7 3 0 3 0x31 0x12c3 yes no 29 as99127f rev.2 (type_name = as99127f) 0x31 0x5ca3 yes no 30 w83781d 7 3 0 3 0x10-1 0x5ca3 yes yes 31 w83627hf 9 3 2 3 0x21 0x5ca3 yes yes(LPC) 32 w83782d 9 3 2-4 3 0x30 0x5ca3 yes yes 33 w83783s 5-6 3 2 1-2 0x40 0x5ca3 yes no 34 35*/ 36 37#include <linux/module.h> 38#include <linux/init.h> 39#include <linux/slab.h> 40#include <linux/jiffies.h> 41#include <linux/i2c.h> 42#include <linux/platform_device.h> 43#include <linux/ioport.h> 44#include <linux/hwmon.h> 45#include <linux/hwmon-vid.h> 46#include <linux/hwmon-sysfs.h> 47#include <linux/sysfs.h> 48#include <linux/err.h> 49#include <linux/mutex.h> 50#include <asm/io.h> 51#include "lm75.h" 52 53/* ISA device, if found */ 54static struct platform_device *pdev; 55 56/* Addresses to scan */ 57static unsigned short normal_i2c[] = { 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 58 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 59 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END }; 60static unsigned short isa_address = 0x290; 61 62/* Insmod parameters */ 63I2C_CLIENT_INSMOD_5(w83781d, w83782d, w83783s, w83627hf, as99127f); 64I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: " 65 "{bus, clientaddr, subclientaddr1, subclientaddr2}"); 66 67static int reset; 68module_param(reset, bool, 0); 69MODULE_PARM_DESC(reset, "Set to one to reset chip on load"); 70 71static int init = 1; 72module_param(init, bool, 0); 73MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization"); 74 75/* Constants specified below */ 76 77/* Length of ISA address segment */ 78#define W83781D_EXTENT 8 79 80/* Where are the ISA address/data registers relative to the base address */ 81#define W83781D_ADDR_REG_OFFSET 5 82#define W83781D_DATA_REG_OFFSET 6 83 84/* The device registers */ 85/* in nr from 0 to 8 */ 86#define W83781D_REG_IN_MAX(nr) ((nr < 7) ? (0x2b + (nr) * 2) : \ 87 (0x554 + (((nr) - 7) * 2))) 88#define W83781D_REG_IN_MIN(nr) ((nr < 7) ? (0x2c + (nr) * 2) : \ 89 (0x555 + (((nr) - 7) * 2))) 90#define W83781D_REG_IN(nr) ((nr < 7) ? (0x20 + (nr)) : \ 91 (0x550 + (nr) - 7)) 92 93/* fan nr from 0 to 2 */ 94#define W83781D_REG_FAN_MIN(nr) (0x3b + (nr)) 95#define W83781D_REG_FAN(nr) (0x28 + (nr)) 96 97#define W83781D_REG_BANK 0x4E 98#define W83781D_REG_TEMP2_CONFIG 0x152 99#define W83781D_REG_TEMP3_CONFIG 0x252 100/* temp nr from 1 to 3 */ 101#define W83781D_REG_TEMP(nr) ((nr == 3) ? (0x0250) : \ 102 ((nr == 2) ? (0x0150) : \ 103 (0x27))) 104#define W83781D_REG_TEMP_HYST(nr) ((nr == 3) ? (0x253) : \ 105 ((nr == 2) ? (0x153) : \ 106 (0x3A))) 107#define W83781D_REG_TEMP_OVER(nr) ((nr == 3) ? (0x255) : \ 108 ((nr == 2) ? (0x155) : \ 109 (0x39))) 110 111#define W83781D_REG_CONFIG 0x40 112 113/* Interrupt status (W83781D, AS99127F) */ 114#define W83781D_REG_ALARM1 0x41 115#define W83781D_REG_ALARM2 0x42 116 117/* Real-time status (W83782D, W83783S, W83627HF) */ 118#define W83782D_REG_ALARM1 0x459 119#define W83782D_REG_ALARM2 0x45A 120#define W83782D_REG_ALARM3 0x45B 121 122#define W83781D_REG_BEEP_CONFIG 0x4D 123#define W83781D_REG_BEEP_INTS1 0x56 124#define W83781D_REG_BEEP_INTS2 0x57 125#define W83781D_REG_BEEP_INTS3 0x453 /* not on W83781D */ 126 127#define W83781D_REG_VID_FANDIV 0x47 128 129#define W83781D_REG_CHIPID 0x49 130#define W83781D_REG_WCHIPID 0x58 131#define W83781D_REG_CHIPMAN 0x4F 132#define W83781D_REG_PIN 0x4B 133 134/* 782D/783S only */ 135#define W83781D_REG_VBAT 0x5D 136 137/* PWM 782D (1-4) and 783S (1-2) only */ 138static const u8 W83781D_REG_PWM[] = { 0x5B, 0x5A, 0x5E, 0x5F }; 139#define W83781D_REG_PWMCLK12 0x5C 140#define W83781D_REG_PWMCLK34 0x45C 141 142#define W83781D_REG_I2C_ADDR 0x48 143#define W83781D_REG_I2C_SUBADDR 0x4A 144 145/* The following are undocumented in the data sheets however we 146 received the information in an email from Winbond tech support */ 147/* Sensor selection - not on 781d */ 148#define W83781D_REG_SCFG1 0x5D 149static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 }; 150 151#define W83781D_REG_SCFG2 0x59 152static const u8 BIT_SCFG2[] = { 0x10, 0x20, 0x40 }; 153 154#define W83781D_DEFAULT_BETA 3435 155 156/* RT Table registers */ 157#define W83781D_REG_RT_IDX 0x50 158#define W83781D_REG_RT_VAL 0x51 159 160/* Conversions */ 161#define IN_TO_REG(val) SENSORS_LIMIT(((val) + 8) / 16, 0, 255) 162#define IN_FROM_REG(val) ((val) * 16) 163 164static inline u8 165FAN_TO_REG(long rpm, int div) 166{ 167 if (rpm == 0) 168 return 255; 169 rpm = SENSORS_LIMIT(rpm, 1, 1000000); 170 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254); 171} 172 173static inline long 174FAN_FROM_REG(u8 val, int div) 175{ 176 if (val == 0) 177 return -1; 178 if (val == 255) 179 return 0; 180 return 1350000 / (val * div); 181} 182 183#define TEMP_TO_REG(val) SENSORS_LIMIT((val) / 1000, -127, 128) 184#define TEMP_FROM_REG(val) ((val) * 1000) 185 186#define BEEP_MASK_FROM_REG(val,type) ((type) == as99127f ? \ 187 (val) ^ 0x7fff : (val)) 188#define BEEP_MASK_TO_REG(val,type) ((type) == as99127f ? \ 189 (~(val)) & 0x7fff : (val) & 0xffffff) 190 191#define DIV_FROM_REG(val) (1 << (val)) 192 193static inline u8 194DIV_TO_REG(long val, enum chips type) 195{ 196 int i; 197 val = SENSORS_LIMIT(val, 1, 198 ((type == w83781d 199 || type == as99127f) ? 8 : 128)) >> 1; 200 for (i = 0; i < 7; i++) { 201 if (val == 0) 202 break; 203 val >>= 1; 204 } 205 return i; 206} 207 208/* There are some complications in a module like this. First off, W83781D chips 209 may be both present on the SMBus and the ISA bus, and we have to handle 210 those cases separately at some places. Second, there might be several 211 W83781D chips available (well, actually, that is probably never done; but 212 it is a clean illustration of how to handle a case like that). Finally, 213 a specific chip may be attached to *both* ISA and SMBus, and we would 214 not like to detect it double. Fortunately, in the case of the W83781D at 215 least, a register tells us what SMBus address we are on, so that helps 216 a bit - except if there could be more than one SMBus. Groan. No solution 217 for this yet. */ 218 219/* For ISA chips, we abuse the i2c_client addr and name fields. We also use 220 the driver field to differentiate between I2C and ISA chips. */ 221struct w83781d_data { 222 struct i2c_client client; 223 struct class_device *class_dev; 224 struct mutex lock; 225 enum chips type; 226 227 struct mutex update_lock; 228 char valid; /* !=0 if following fields are valid */ 229 unsigned long last_updated; /* In jiffies */ 230 231 struct i2c_client *lm75[2]; /* for secondary I2C addresses */ 232 /* array of 2 pointers to subclients */ 233 234 u8 in[9]; /* Register value - 8 & 9 for 782D only */ 235 u8 in_max[9]; /* Register value - 8 & 9 for 782D only */ 236 u8 in_min[9]; /* Register value - 8 & 9 for 782D only */ 237 u8 fan[3]; /* Register value */ 238 u8 fan_min[3]; /* Register value */ 239 s8 temp; /* Register value */ 240 s8 temp_max; /* Register value */ 241 s8 temp_max_hyst; /* Register value */ 242 u16 temp_add[2]; /* Register value */ 243 u16 temp_max_add[2]; /* Register value */ 244 u16 temp_max_hyst_add[2]; /* Register value */ 245 u8 fan_div[3]; /* Register encoding, shifted right */ 246 u8 vid; /* Register encoding, combined */ 247 u32 alarms; /* Register encoding, combined */ 248 u32 beep_mask; /* Register encoding, combined */ 249 u8 beep_enable; /* Boolean */ 250 u8 pwm[4]; /* Register value */ 251 u8 pwm2_enable; /* Boolean */ 252 u16 sens[3]; /* 782D/783S only. 253 1 = pentium diode; 2 = 3904 diode; 254 3000-5000 = thermistor beta. 255 Default = 3435. 256 Other Betas unimplemented */ 257 u8 vrm; 258}; 259 260static int w83781d_attach_adapter(struct i2c_adapter *adapter); 261static int w83781d_detect(struct i2c_adapter *adapter, int address, int kind); 262static int w83781d_detach_client(struct i2c_client *client); 263 264static int __devinit w83781d_isa_probe(struct platform_device *pdev); 265static int __devexit w83781d_isa_remove(struct platform_device *pdev); 266 267static int w83781d_read_value(struct w83781d_data *data, u16 reg); 268static int w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value); 269static struct w83781d_data *w83781d_update_device(struct device *dev); 270static void w83781d_init_device(struct device *dev); 271 272static struct i2c_driver w83781d_driver = { 273 .driver = { 274 .name = "w83781d", 275 }, 276 .id = I2C_DRIVERID_W83781D, 277 .attach_adapter = w83781d_attach_adapter, 278 .detach_client = w83781d_detach_client, 279}; 280 281static struct platform_driver w83781d_isa_driver = { 282 .driver = { 283 .owner = THIS_MODULE, 284 .name = "w83781d", 285 }, 286 .probe = w83781d_isa_probe, 287 .remove = w83781d_isa_remove, 288}; 289 290 291/* following are the sysfs callback functions */ 292#define show_in_reg(reg) \ 293static ssize_t show_##reg (struct device *dev, struct device_attribute *da, \ 294 char *buf) \ 295{ \ 296 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ 297 struct w83781d_data *data = w83781d_update_device(dev); \ 298 return sprintf(buf, "%ld\n", \ 299 (long)IN_FROM_REG(data->reg[attr->index])); \ 300} 301show_in_reg(in); 302show_in_reg(in_min); 303show_in_reg(in_max); 304 305#define store_in_reg(REG, reg) \ 306static ssize_t store_in_##reg (struct device *dev, struct device_attribute \ 307 *da, const char *buf, size_t count) \ 308{ \ 309 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ 310 struct w83781d_data *data = dev_get_drvdata(dev); \ 311 int nr = attr->index; \ 312 u32 val; \ 313 \ 314 val = simple_strtoul(buf, NULL, 10); \ 315 \ 316 mutex_lock(&data->update_lock); \ 317 data->in_##reg[nr] = IN_TO_REG(val); \ 318 w83781d_write_value(data, W83781D_REG_IN_##REG(nr), data->in_##reg[nr]); \ 319 \ 320 mutex_unlock(&data->update_lock); \ 321 return count; \ 322} 323store_in_reg(MIN, min); 324store_in_reg(MAX, max); 325 326#define sysfs_in_offsets(offset) \ 327static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 328 show_in, NULL, offset); \ 329static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 330 show_in_min, store_in_min, offset); \ 331static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 332 show_in_max, store_in_max, offset) 333 334sysfs_in_offsets(0); 335sysfs_in_offsets(1); 336sysfs_in_offsets(2); 337sysfs_in_offsets(3); 338sysfs_in_offsets(4); 339sysfs_in_offsets(5); 340sysfs_in_offsets(6); 341sysfs_in_offsets(7); 342sysfs_in_offsets(8); 343 344#define show_fan_reg(reg) \ 345static ssize_t show_##reg (struct device *dev, struct device_attribute *da, \ 346 char *buf) \ 347{ \ 348 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ 349 struct w83781d_data *data = w83781d_update_device(dev); \ 350 return sprintf(buf,"%ld\n", \ 351 FAN_FROM_REG(data->reg[attr->index], \ 352 DIV_FROM_REG(data->fan_div[attr->index]))); \ 353} 354show_fan_reg(fan); 355show_fan_reg(fan_min); 356 357static ssize_t 358store_fan_min(struct device *dev, struct device_attribute *da, 359 const char *buf, size_t count) 360{ 361 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 362 struct w83781d_data *data = dev_get_drvdata(dev); 363 int nr = attr->index; 364 u32 val; 365 366 val = simple_strtoul(buf, NULL, 10); 367 368 mutex_lock(&data->update_lock); 369 data->fan_min[nr] = 370 FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 371 w83781d_write_value(data, W83781D_REG_FAN_MIN(nr), 372 data->fan_min[nr]); 373 374 mutex_unlock(&data->update_lock); 375 return count; 376} 377 378static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 379static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR, 380 show_fan_min, store_fan_min, 0); 381static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); 382static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR, 383 show_fan_min, store_fan_min, 1); 384static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); 385static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO | S_IWUSR, 386 show_fan_min, store_fan_min, 2); 387 388#define show_temp_reg(reg) \ 389static ssize_t show_##reg (struct device *dev, struct device_attribute *da, \ 390 char *buf) \ 391{ \ 392 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ 393 struct w83781d_data *data = w83781d_update_device(dev); \ 394 int nr = attr->index; \ 395 if (nr >= 2) { /* TEMP2 and TEMP3 */ \ 396 return sprintf(buf,"%d\n", \ 397 LM75_TEMP_FROM_REG(data->reg##_add[nr-2])); \ 398 } else { /* TEMP1 */ \ 399 return sprintf(buf,"%ld\n", (long)TEMP_FROM_REG(data->reg)); \ 400 } \ 401} 402show_temp_reg(temp); 403show_temp_reg(temp_max); 404show_temp_reg(temp_max_hyst); 405 406#define store_temp_reg(REG, reg) \ 407static ssize_t store_temp_##reg (struct device *dev, \ 408 struct device_attribute *da, const char *buf, size_t count) \ 409{ \ 410 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ 411 struct w83781d_data *data = dev_get_drvdata(dev); \ 412 int nr = attr->index; \ 413 s32 val; \ 414 \ 415 val = simple_strtol(buf, NULL, 10); \ 416 \ 417 mutex_lock(&data->update_lock); \ 418 \ 419 if (nr >= 2) { /* TEMP2 and TEMP3 */ \ 420 data->temp_##reg##_add[nr-2] = LM75_TEMP_TO_REG(val); \ 421 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \ 422 data->temp_##reg##_add[nr-2]); \ 423 } else { /* TEMP1 */ \ 424 data->temp_##reg = TEMP_TO_REG(val); \ 425 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \ 426 data->temp_##reg); \ 427 } \ 428 \ 429 mutex_unlock(&data->update_lock); \ 430 return count; \ 431} 432store_temp_reg(OVER, max); 433store_temp_reg(HYST, max_hyst); 434 435#define sysfs_temp_offsets(offset) \ 436static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 437 show_temp, NULL, offset); \ 438static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 439 show_temp_max, store_temp_max, offset); \ 440static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ 441 show_temp_max_hyst, store_temp_max_hyst, offset); 442 443sysfs_temp_offsets(1); 444sysfs_temp_offsets(2); 445sysfs_temp_offsets(3); 446 447static ssize_t 448show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf) 449{ 450 struct w83781d_data *data = w83781d_update_device(dev); 451 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 452} 453 454static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 455 456static ssize_t 457show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf) 458{ 459 struct w83781d_data *data = w83781d_update_device(dev); 460 return sprintf(buf, "%ld\n", (long) data->vrm); 461} 462 463static ssize_t 464store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 465{ 466 struct w83781d_data *data = dev_get_drvdata(dev); 467 u32 val; 468 469 val = simple_strtoul(buf, NULL, 10); 470 data->vrm = val; 471 472 return count; 473} 474 475static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 476 477static ssize_t 478show_alarms_reg(struct device *dev, struct device_attribute *attr, char *buf) 479{ 480 struct w83781d_data *data = w83781d_update_device(dev); 481 return sprintf(buf, "%u\n", data->alarms); 482} 483 484static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL); 485 486static ssize_t show_beep_mask (struct device *dev, struct device_attribute *attr, char *buf) 487{ 488 struct w83781d_data *data = w83781d_update_device(dev); 489 return sprintf(buf, "%ld\n", 490 (long)BEEP_MASK_FROM_REG(data->beep_mask, data->type)); 491} 492static ssize_t show_beep_enable (struct device *dev, struct device_attribute *attr, char *buf) 493{ 494 struct w83781d_data *data = w83781d_update_device(dev); 495 return sprintf(buf, "%ld\n", (long)data->beep_enable); 496} 497 498static ssize_t 499store_beep_mask(struct device *dev, struct device_attribute *attr, 500 const char *buf, size_t count) 501{ 502 struct w83781d_data *data = dev_get_drvdata(dev); 503 u32 val; 504 505 val = simple_strtoul(buf, NULL, 10); 506 507 mutex_lock(&data->update_lock); 508 data->beep_mask = BEEP_MASK_TO_REG(val, data->type); 509 w83781d_write_value(data, W83781D_REG_BEEP_INTS1, 510 data->beep_mask & 0xff); 511 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, 512 ((data->beep_mask >> 8) & 0x7f) 513 | data->beep_enable << 7); 514 if (data->type != w83781d && data->type != as99127f) { 515 w83781d_write_value(data, W83781D_REG_BEEP_INTS3, 516 ((data->beep_mask) >> 16) & 0xff); 517 } 518 mutex_unlock(&data->update_lock); 519 520 return count; 521} 522 523static ssize_t 524store_beep_enable(struct device *dev, struct device_attribute *attr, 525 const char *buf, size_t count) 526{ 527 struct w83781d_data *data = dev_get_drvdata(dev); 528 u32 val; 529 530 val = simple_strtoul(buf, NULL, 10); 531 if (val != 0 && val != 1) 532 return -EINVAL; 533 534 mutex_lock(&data->update_lock); 535 data->beep_enable = val; 536 val = w83781d_read_value(data, W83781D_REG_BEEP_INTS2) & 0x7f; 537 val |= data->beep_enable << 7; 538 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, val); 539 mutex_unlock(&data->update_lock); 540 541 return count; 542} 543 544static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR, 545 show_beep_mask, store_beep_mask); 546static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR, 547 show_beep_enable, store_beep_enable); 548 549static ssize_t 550show_fan_div(struct device *dev, struct device_attribute *da, char *buf) 551{ 552 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 553 struct w83781d_data *data = w83781d_update_device(dev); 554 return sprintf(buf, "%ld\n", 555 (long) DIV_FROM_REG(data->fan_div[attr->index])); 556} 557 558/* Note: we save and restore the fan minimum here, because its value is 559 determined in part by the fan divisor. This follows the principle of 560 least surprise; the user doesn't expect the fan minimum to change just 561 because the divisor changed. */ 562static ssize_t 563store_fan_div(struct device *dev, struct device_attribute *da, 564 const char *buf, size_t count) 565{ 566 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 567 struct w83781d_data *data = dev_get_drvdata(dev); 568 unsigned long min; 569 int nr = attr->index; 570 u8 reg; 571 unsigned long val = simple_strtoul(buf, NULL, 10); 572 573 mutex_lock(&data->update_lock); 574 575 /* Save fan_min */ 576 min = FAN_FROM_REG(data->fan_min[nr], 577 DIV_FROM_REG(data->fan_div[nr])); 578 579 data->fan_div[nr] = DIV_TO_REG(val, data->type); 580 581 reg = (w83781d_read_value(data, nr==2 ? W83781D_REG_PIN : W83781D_REG_VID_FANDIV) 582 & (nr==0 ? 0xcf : 0x3f)) 583 | ((data->fan_div[nr] & 0x03) << (nr==0 ? 4 : 6)); 584 w83781d_write_value(data, nr==2 ? W83781D_REG_PIN : W83781D_REG_VID_FANDIV, reg); 585 586 /* w83781d and as99127f don't have extended divisor bits */ 587 if (data->type != w83781d && data->type != as99127f) { 588 reg = (w83781d_read_value(data, W83781D_REG_VBAT) 589 & ~(1 << (5 + nr))) 590 | ((data->fan_div[nr] & 0x04) << (3 + nr)); 591 w83781d_write_value(data, W83781D_REG_VBAT, reg); 592 } 593 594 /* Restore fan_min */ 595 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 596 w83781d_write_value(data, W83781D_REG_FAN_MIN(nr), data->fan_min[nr]); 597 598 mutex_unlock(&data->update_lock); 599 return count; 600} 601 602static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, 603 show_fan_div, store_fan_div, 0); 604static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, 605 show_fan_div, store_fan_div, 1); 606static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR, 607 show_fan_div, store_fan_div, 2); 608 609static ssize_t 610show_pwm(struct device *dev, struct device_attribute *da, char *buf) 611{ 612 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 613 struct w83781d_data *data = w83781d_update_device(dev); 614 return sprintf(buf, "%d\n", (int)data->pwm[attr->index]); 615} 616 617static ssize_t 618show_pwm2_enable(struct device *dev, struct device_attribute *da, char *buf) 619{ 620 struct w83781d_data *data = w83781d_update_device(dev); 621 return sprintf(buf, "%d\n", (int)data->pwm2_enable); 622} 623 624static ssize_t 625store_pwm(struct device *dev, struct device_attribute *da, const char *buf, 626 size_t count) 627{ 628 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 629 struct w83781d_data *data = dev_get_drvdata(dev); 630 int nr = attr->index; 631 u32 val; 632 633 val = simple_strtoul(buf, NULL, 10); 634 635 mutex_lock(&data->update_lock); 636 data->pwm[nr] = SENSORS_LIMIT(val, 0, 255); 637 w83781d_write_value(data, W83781D_REG_PWM[nr], data->pwm[nr]); 638 mutex_unlock(&data->update_lock); 639 return count; 640} 641 642static ssize_t 643store_pwm2_enable(struct device *dev, struct device_attribute *da, 644 const char *buf, size_t count) 645{ 646 struct w83781d_data *data = dev_get_drvdata(dev); 647 u32 val, reg; 648 649 val = simple_strtoul(buf, NULL, 10); 650 651 mutex_lock(&data->update_lock); 652 653 switch (val) { 654 case 0: 655 case 1: 656 reg = w83781d_read_value(data, W83781D_REG_PWMCLK12); 657 w83781d_write_value(data, W83781D_REG_PWMCLK12, 658 (reg & 0xf7) | (val << 3)); 659 660 reg = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG); 661 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, 662 (reg & 0xef) | (!val << 4)); 663 664 data->pwm2_enable = val; 665 break; 666 667 default: 668 mutex_unlock(&data->update_lock); 669 return -EINVAL; 670 } 671 672 mutex_unlock(&data->update_lock); 673 return count; 674} 675 676static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0); 677static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 1); 678static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 2); 679static SENSOR_DEVICE_ATTR(pwm4, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 3); 680/* only PWM2 can be enabled/disabled */ 681static DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR, 682 show_pwm2_enable, store_pwm2_enable); 683 684static ssize_t 685show_sensor(struct device *dev, struct device_attribute *da, char *buf) 686{ 687 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 688 struct w83781d_data *data = w83781d_update_device(dev); 689 return sprintf(buf, "%d\n", (int)data->sens[attr->index]); 690} 691 692static ssize_t 693store_sensor(struct device *dev, struct device_attribute *da, 694 const char *buf, size_t count) 695{ 696 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 697 struct w83781d_data *data = dev_get_drvdata(dev); 698 int nr = attr->index; 699 u32 val, tmp; 700 701 val = simple_strtoul(buf, NULL, 10); 702 703 mutex_lock(&data->update_lock); 704 705 switch (val) { 706 case 1: /* PII/Celeron diode */ 707 tmp = w83781d_read_value(data, W83781D_REG_SCFG1); 708 w83781d_write_value(data, W83781D_REG_SCFG1, 709 tmp | BIT_SCFG1[nr]); 710 tmp = w83781d_read_value(data, W83781D_REG_SCFG2); 711 w83781d_write_value(data, W83781D_REG_SCFG2, 712 tmp | BIT_SCFG2[nr]); 713 data->sens[nr] = val; 714 break; 715 case 2: /* 3904 */ 716 tmp = w83781d_read_value(data, W83781D_REG_SCFG1); 717 w83781d_write_value(data, W83781D_REG_SCFG1, 718 tmp | BIT_SCFG1[nr]); 719 tmp = w83781d_read_value(data, W83781D_REG_SCFG2); 720 w83781d_write_value(data, W83781D_REG_SCFG2, 721 tmp & ~BIT_SCFG2[nr]); 722 data->sens[nr] = val; 723 break; 724 case W83781D_DEFAULT_BETA: /* thermistor */ 725 tmp = w83781d_read_value(data, W83781D_REG_SCFG1); 726 w83781d_write_value(data, W83781D_REG_SCFG1, 727 tmp & ~BIT_SCFG1[nr]); 728 data->sens[nr] = val; 729 break; 730 default: 731 dev_err(dev, "Invalid sensor type %ld; must be 1, 2, or %d\n", 732 (long) val, W83781D_DEFAULT_BETA); 733 break; 734 } 735 736 mutex_unlock(&data->update_lock); 737 return count; 738} 739 740static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, 741 show_sensor, store_sensor, 0); 742static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, 743 show_sensor, store_sensor, 0); 744static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, 745 show_sensor, store_sensor, 0); 746 747/* I2C devices get this name attribute automatically, but for ISA devices 748 we must create it by ourselves. */ 749static ssize_t 750show_name(struct device *dev, struct device_attribute *devattr, char *buf) 751{ 752 struct w83781d_data *data = dev_get_drvdata(dev); 753 return sprintf(buf, "%s\n", data->client.name); 754} 755static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 756 757/* This function is called when: 758 * w83781d_driver is inserted (when this module is loaded), for each 759 available adapter 760 * when a new adapter is inserted (and w83781d_driver is still present) */ 761static int 762w83781d_attach_adapter(struct i2c_adapter *adapter) 763{ 764 if (!(adapter->class & I2C_CLASS_HWMON)) 765 return 0; 766 return i2c_probe(adapter, &addr_data, w83781d_detect); 767} 768 769/* Assumes that adapter is of I2C, not ISA variety. 770 * OTHERWISE DON'T CALL THIS 771 */ 772static int 773w83781d_detect_subclients(struct i2c_adapter *adapter, int address, int kind, 774 struct i2c_client *new_client) 775{ 776 int i, val1 = 0, id; 777 int err; 778 const char *client_name = ""; 779 struct w83781d_data *data = i2c_get_clientdata(new_client); 780 781 data->lm75[0] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); 782 if (!(data->lm75[0])) { 783 err = -ENOMEM; 784 goto ERROR_SC_0; 785 } 786 787 id = i2c_adapter_id(adapter); 788 789 if (force_subclients[0] == id && force_subclients[1] == address) { 790 for (i = 2; i <= 3; i++) { 791 if (force_subclients[i] < 0x48 || 792 force_subclients[i] > 0x4f) { 793 dev_err(&new_client->dev, "Invalid subclient " 794 "address %d; must be 0x48-0x4f\n", 795 force_subclients[i]); 796 err = -EINVAL; 797 goto ERROR_SC_1; 798 } 799 } 800 w83781d_write_value(data, W83781D_REG_I2C_SUBADDR, 801 (force_subclients[2] & 0x07) | 802 ((force_subclients[3] & 0x07) << 4)); 803 data->lm75[0]->addr = force_subclients[2]; 804 } else { 805 val1 = w83781d_read_value(data, W83781D_REG_I2C_SUBADDR); 806 data->lm75[0]->addr = 0x48 + (val1 & 0x07); 807 } 808 809 if (kind != w83783s) { 810 data->lm75[1] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); 811 if (!(data->lm75[1])) { 812 err = -ENOMEM; 813 goto ERROR_SC_1; 814 } 815 816 if (force_subclients[0] == id && 817 force_subclients[1] == address) { 818 data->lm75[1]->addr = force_subclients[3]; 819 } else { 820 data->lm75[1]->addr = 0x48 + ((val1 >> 4) & 0x07); 821 } 822 if (data->lm75[0]->addr == data->lm75[1]->addr) { 823 dev_err(&new_client->dev, 824 "Duplicate addresses 0x%x for subclients.\n", 825 data->lm75[0]->addr); 826 err = -EBUSY; 827 goto ERROR_SC_2; 828 } 829 } 830 831 if (kind == w83781d) 832 client_name = "w83781d subclient"; 833 else if (kind == w83782d) 834 client_name = "w83782d subclient"; 835 else if (kind == w83783s) 836 client_name = "w83783s subclient"; 837 else if (kind == w83627hf) 838 client_name = "w83627hf subclient"; 839 else if (kind == as99127f) 840 client_name = "as99127f subclient"; 841 842 for (i = 0; i <= 1; i++) { 843 /* store all data in w83781d */ 844 i2c_set_clientdata(data->lm75[i], NULL); 845 data->lm75[i]->adapter = adapter; 846 data->lm75[i]->driver = &w83781d_driver; 847 data->lm75[i]->flags = 0; 848 strlcpy(data->lm75[i]->name, client_name, 849 I2C_NAME_SIZE); 850 if ((err = i2c_attach_client(data->lm75[i]))) { 851 dev_err(&new_client->dev, "Subclient %d " 852 "registration at address 0x%x " 853 "failed.\n", i, data->lm75[i]->addr); 854 if (i == 1) 855 goto ERROR_SC_3; 856 goto ERROR_SC_2; 857 } 858 if (kind == w83783s) 859 break; 860 } 861 862 return 0; 863 864/* Undo inits in case of errors */ 865ERROR_SC_3: 866 i2c_detach_client(data->lm75[0]); 867ERROR_SC_2: 868 kfree(data->lm75[1]); 869ERROR_SC_1: 870 kfree(data->lm75[0]); 871ERROR_SC_0: 872 return err; 873} 874 875#define IN_UNIT_ATTRS(X) \ 876 &sensor_dev_attr_in##X##_input.dev_attr.attr, \ 877 &sensor_dev_attr_in##X##_min.dev_attr.attr, \ 878 &sensor_dev_attr_in##X##_max.dev_attr.attr 879 880#define FAN_UNIT_ATTRS(X) \ 881 &sensor_dev_attr_fan##X##_input.dev_attr.attr, \ 882 &sensor_dev_attr_fan##X##_min.dev_attr.attr, \ 883 &sensor_dev_attr_fan##X##_div.dev_attr.attr 884 885#define TEMP_UNIT_ATTRS(X) \ 886 &sensor_dev_attr_temp##X##_input.dev_attr.attr, \ 887 &sensor_dev_attr_temp##X##_max.dev_attr.attr, \ 888 &sensor_dev_attr_temp##X##_max_hyst.dev_attr.attr 889 890static struct attribute* w83781d_attributes[] = { 891 IN_UNIT_ATTRS(0), 892 IN_UNIT_ATTRS(2), 893 IN_UNIT_ATTRS(3), 894 IN_UNIT_ATTRS(4), 895 IN_UNIT_ATTRS(5), 896 IN_UNIT_ATTRS(6), 897 FAN_UNIT_ATTRS(1), 898 FAN_UNIT_ATTRS(2), 899 FAN_UNIT_ATTRS(3), 900 TEMP_UNIT_ATTRS(1), 901 TEMP_UNIT_ATTRS(2), 902 &dev_attr_cpu0_vid.attr, 903 &dev_attr_vrm.attr, 904 &dev_attr_alarms.attr, 905 &dev_attr_beep_mask.attr, 906 &dev_attr_beep_enable.attr, 907 NULL 908}; 909static const struct attribute_group w83781d_group = { 910 .attrs = w83781d_attributes, 911}; 912 913static struct attribute *w83781d_attributes_opt[] = { 914 IN_UNIT_ATTRS(1), 915 IN_UNIT_ATTRS(7), 916 IN_UNIT_ATTRS(8), 917 TEMP_UNIT_ATTRS(3), 918 &sensor_dev_attr_pwm1.dev_attr.attr, 919 &sensor_dev_attr_pwm2.dev_attr.attr, 920 &sensor_dev_attr_pwm3.dev_attr.attr, 921 &sensor_dev_attr_pwm4.dev_attr.attr, 922 &dev_attr_pwm2_enable.attr, 923 &sensor_dev_attr_temp1_type.dev_attr.attr, 924 &sensor_dev_attr_temp2_type.dev_attr.attr, 925 &sensor_dev_attr_temp3_type.dev_attr.attr, 926 NULL 927}; 928static const struct attribute_group w83781d_group_opt = { 929 .attrs = w83781d_attributes_opt, 930}; 931 932/* No clean up is done on error, it's up to the caller */ 933static int 934w83781d_create_files(struct device *dev, int kind, int is_isa) 935{ 936 int err; 937 938 if ((err = sysfs_create_group(&dev->kobj, &w83781d_group))) 939 return err; 940 941 if (kind != w83783s) { 942 if ((err = device_create_file(dev, 943 &sensor_dev_attr_in1_input.dev_attr)) 944 || (err = device_create_file(dev, 945 &sensor_dev_attr_in1_min.dev_attr)) 946 || (err = device_create_file(dev, 947 &sensor_dev_attr_in1_max.dev_attr))) 948 return err; 949 } 950 if (kind != as99127f && kind != w83781d && kind != w83783s) { 951 if ((err = device_create_file(dev, 952 &sensor_dev_attr_in7_input.dev_attr)) 953 || (err = device_create_file(dev, 954 &sensor_dev_attr_in7_min.dev_attr)) 955 || (err = device_create_file(dev, 956 &sensor_dev_attr_in7_max.dev_attr)) 957 || (err = device_create_file(dev, 958 &sensor_dev_attr_in8_input.dev_attr)) 959 || (err = device_create_file(dev, 960 &sensor_dev_attr_in8_min.dev_attr)) 961 || (err = device_create_file(dev, 962 &sensor_dev_attr_in8_max.dev_attr))) 963 return err; 964 } 965 if (kind != w83783s) { 966 if ((err = device_create_file(dev, 967 &sensor_dev_attr_temp3_input.dev_attr)) 968 || (err = device_create_file(dev, 969 &sensor_dev_attr_temp3_max.dev_attr)) 970 || (err = device_create_file(dev, 971 &sensor_dev_attr_temp3_max_hyst.dev_attr))) 972 return err; 973 } 974 975 if (kind != w83781d && kind != as99127f) { 976 if ((err = device_create_file(dev, 977 &sensor_dev_attr_pwm1.dev_attr)) 978 || (err = device_create_file(dev, 979 &sensor_dev_attr_pwm2.dev_attr)) 980 || (err = device_create_file(dev, &dev_attr_pwm2_enable))) 981 return err; 982 } 983 if (kind == w83782d && !is_isa) { 984 if ((err = device_create_file(dev, 985 &sensor_dev_attr_pwm3.dev_attr)) 986 || (err = device_create_file(dev, 987 &sensor_dev_attr_pwm4.dev_attr))) 988 return err; 989 } 990 991 if (kind != as99127f && kind != w83781d) { 992 if ((err = device_create_file(dev, 993 &sensor_dev_attr_temp1_type.dev_attr)) 994 || (err = device_create_file(dev, 995 &sensor_dev_attr_temp2_type.dev_attr))) 996 return err; 997 if (kind != w83783s) { 998 if ((err = device_create_file(dev, 999 &sensor_dev_attr_temp3_type.dev_attr))) 1000 return err; 1001 } 1002 } 1003 1004 if (is_isa) { 1005 err = device_create_file(&pdev->dev, &dev_attr_name); 1006 if (err) 1007 return err; 1008 } 1009 1010 return 0; 1011} 1012 1013static int 1014w83781d_detect(struct i2c_adapter *adapter, int address, int kind) 1015{ 1016 int val1 = 0, val2; 1017 struct i2c_client *client; 1018 struct device *dev; 1019 struct w83781d_data *data; 1020 int err; 1021 const char *client_name = ""; 1022 enum vendor { winbond, asus } vendid; 1023 1024 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { 1025 err = -EINVAL; 1026 goto ERROR1; 1027 } 1028 1029 /* OK. For now, we presume we have a valid client. We now create the 1030 client structure, even though we cannot fill it completely yet. 1031 But it allows us to access w83781d_{read,write}_value. */ 1032 1033 if (!(data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL))) { 1034 err = -ENOMEM; 1035 goto ERROR1; 1036 } 1037 1038 client = &data->client; 1039 i2c_set_clientdata(client, data); 1040 client->addr = address; 1041 mutex_init(&data->lock); 1042 client->adapter = adapter; 1043 client->driver = &w83781d_driver; 1044 dev = &client->dev; 1045 1046 /* Now, we do the remaining detection. */ 1047 1048 /* The w8378?d may be stuck in some other bank than bank 0. This may 1049 make reading other information impossible. Specify a force=... or 1050 force_*=... parameter, and the Winbond will be reset to the right 1051 bank. */ 1052 if (kind < 0) { 1053 if (w83781d_read_value(data, W83781D_REG_CONFIG) & 0x80) { 1054 dev_dbg(&adapter->dev, "Detection of w83781d chip " 1055 "failed at step 3\n"); 1056 err = -ENODEV; 1057 goto ERROR2; 1058 } 1059 val1 = w83781d_read_value(data, W83781D_REG_BANK); 1060 val2 = w83781d_read_value(data, W83781D_REG_CHIPMAN); 1061 /* Check for Winbond or Asus ID if in bank 0 */ 1062 if ((!(val1 & 0x07)) && 1063 (((!(val1 & 0x80)) && (val2 != 0xa3) && (val2 != 0xc3)) 1064 || ((val1 & 0x80) && (val2 != 0x5c) && (val2 != 0x12)))) { 1065 dev_dbg(&adapter->dev, "Detection of w83781d chip " 1066 "failed at step 4\n"); 1067 err = -ENODEV; 1068 goto ERROR2; 1069 } 1070 /* If Winbond SMBus, check address at 0x48. 1071 Asus doesn't support, except for as99127f rev.2 */ 1072 if ((!(val1 & 0x80) && (val2 == 0xa3)) || 1073 ((val1 & 0x80) && (val2 == 0x5c))) { 1074 if (w83781d_read_value 1075 (data, W83781D_REG_I2C_ADDR) != address) { 1076 dev_dbg(&adapter->dev, "Detection of w83781d " 1077 "chip failed at step 5\n"); 1078 err = -ENODEV; 1079 goto ERROR2; 1080 } 1081 } 1082 } 1083 1084 /* We have either had a force parameter, or we have already detected the 1085 Winbond. Put it now into bank 0 and Vendor ID High Byte */ 1086 w83781d_write_value(data, W83781D_REG_BANK, 1087 (w83781d_read_value(data, W83781D_REG_BANK) 1088 & 0x78) | 0x80); 1089 1090 /* Determine the chip type. */ 1091 if (kind <= 0) { 1092 /* get vendor ID */ 1093 val2 = w83781d_read_value(data, W83781D_REG_CHIPMAN); 1094 if (val2 == 0x5c) 1095 vendid = winbond; 1096 else if (val2 == 0x12) 1097 vendid = asus; 1098 else { 1099 dev_dbg(&adapter->dev, "w83781d chip vendor is " 1100 "neither Winbond nor Asus\n"); 1101 err = -ENODEV; 1102 goto ERROR2; 1103 } 1104 1105 val1 = w83781d_read_value(data, W83781D_REG_WCHIPID); 1106 if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond) 1107 kind = w83781d; 1108 else if (val1 == 0x30 && vendid == winbond) 1109 kind = w83782d; 1110 else if (val1 == 0x40 && vendid == winbond && address == 0x2d) 1111 kind = w83783s; 1112 else if (val1 == 0x21 && vendid == winbond) 1113 kind = w83627hf; 1114 else if (val1 == 0x31 && address >= 0x28) 1115 kind = as99127f; 1116 else { 1117 if (kind == 0) 1118 dev_warn(&adapter->dev, "Ignoring 'force' " 1119 "parameter for unknown chip at " 1120 "address 0x%02x\n", address); 1121 err = -EINVAL; 1122 goto ERROR2; 1123 } 1124 } 1125 1126 if (kind == w83781d) { 1127 client_name = "w83781d"; 1128 } else if (kind == w83782d) { 1129 client_name = "w83782d"; 1130 } else if (kind == w83783s) { 1131 client_name = "w83783s"; 1132 } else if (kind == w83627hf) { 1133 client_name = "w83627hf"; 1134 } else if (kind == as99127f) { 1135 client_name = "as99127f"; 1136 } 1137 1138 /* Fill in the remaining client fields and put into the global list */ 1139 strlcpy(client->name, client_name, I2C_NAME_SIZE); 1140 data->type = kind; 1141 1142 /* Tell the I2C layer a new client has arrived */ 1143 if ((err = i2c_attach_client(client))) 1144 goto ERROR2; 1145 1146 /* attach secondary i2c lm75-like clients */ 1147 if ((err = w83781d_detect_subclients(adapter, address, 1148 kind, client))) 1149 goto ERROR3; 1150 1151 /* Initialize the chip */ 1152 w83781d_init_device(dev); 1153 1154 /* Register sysfs hooks */ 1155 err = w83781d_create_files(dev, kind, 0); 1156 if (err) 1157 goto ERROR4; 1158 1159 data->class_dev = hwmon_device_register(dev); 1160 if (IS_ERR(data->class_dev)) { 1161 err = PTR_ERR(data->class_dev); 1162 goto ERROR4; 1163 } 1164 1165 return 0; 1166 1167ERROR4: 1168 sysfs_remove_group(&dev->kobj, &w83781d_group); 1169 sysfs_remove_group(&dev->kobj, &w83781d_group_opt); 1170 1171 if (data->lm75[1]) { 1172 i2c_detach_client(data->lm75[1]); 1173 kfree(data->lm75[1]); 1174 } 1175 if (data->lm75[0]) { 1176 i2c_detach_client(data->lm75[0]); 1177 kfree(data->lm75[0]); 1178 } 1179ERROR3: 1180 i2c_detach_client(client); 1181ERROR2: 1182 kfree(data); 1183ERROR1: 1184 return err; 1185} 1186 1187static int 1188w83781d_detach_client(struct i2c_client *client) 1189{ 1190 struct w83781d_data *data = i2c_get_clientdata(client); 1191 int err; 1192 1193 /* main client */ 1194 if (data) { 1195 hwmon_device_unregister(data->class_dev); 1196 sysfs_remove_group(&client->dev.kobj, &w83781d_group); 1197 sysfs_remove_group(&client->dev.kobj, &w83781d_group_opt); 1198 } 1199 1200 if ((err = i2c_detach_client(client))) 1201 return err; 1202 1203 /* main client */ 1204 if (data) 1205 kfree(data); 1206 1207 /* subclient */ 1208 else 1209 kfree(client); 1210 1211 return 0; 1212} 1213 1214static int __devinit 1215w83781d_isa_probe(struct platform_device *pdev) 1216{ 1217 int err, reg; 1218 struct w83781d_data *data; 1219 struct resource *res; 1220 const char *name; 1221 1222 /* Reserve the ISA region */ 1223 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1224 if (!request_region(res->start, W83781D_EXTENT, "w83781d")) { 1225 err = -EBUSY; 1226 goto exit; 1227 } 1228 1229 if (!(data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL))) { 1230 err = -ENOMEM; 1231 goto exit_release_region; 1232 } 1233 mutex_init(&data->lock); 1234 data->client.addr = res->start; 1235 i2c_set_clientdata(&data->client, data); 1236 platform_set_drvdata(pdev, data); 1237 1238 reg = w83781d_read_value(data, W83781D_REG_WCHIPID); 1239 switch (reg) { 1240 case 0x21: 1241 data->type = w83627hf; 1242 name = "w83627hf"; 1243 break; 1244 case 0x30: 1245 data->type = w83782d; 1246 name = "w83782d"; 1247 break; 1248 default: 1249 data->type = w83781d; 1250 name = "w83781d"; 1251 } 1252 strlcpy(data->client.name, name, I2C_NAME_SIZE); 1253 1254 /* Initialize the W83781D chip */ 1255 w83781d_init_device(&pdev->dev); 1256 1257 /* Register sysfs hooks */ 1258 err = w83781d_create_files(&pdev->dev, data->type, 1); 1259 if (err) 1260 goto exit_remove_files; 1261 1262 data->class_dev = hwmon_device_register(&pdev->dev); 1263 if (IS_ERR(data->class_dev)) { 1264 err = PTR_ERR(data->class_dev); 1265 goto exit_remove_files; 1266 } 1267 1268 return 0; 1269 1270 exit_remove_files: 1271 sysfs_remove_group(&pdev->dev.kobj, &w83781d_group); 1272 sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt); 1273 device_remove_file(&pdev->dev, &dev_attr_name); 1274 kfree(data); 1275 exit_release_region: 1276 release_region(res->start, W83781D_EXTENT); 1277 exit: 1278 return err; 1279} 1280 1281static int __devexit 1282w83781d_isa_remove(struct platform_device *pdev) 1283{ 1284 struct w83781d_data *data = platform_get_drvdata(pdev); 1285 1286 hwmon_device_unregister(data->class_dev); 1287 sysfs_remove_group(&pdev->dev.kobj, &w83781d_group); 1288 sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt); 1289 device_remove_file(&pdev->dev, &dev_attr_name); 1290 release_region(data->client.addr, W83781D_EXTENT); 1291 kfree(data); 1292 1293 return 0; 1294} 1295 1296/* The SMBus locks itself, usually, but nothing may access the Winbond between 1297 bank switches. ISA access must always be locked explicitly! 1298 We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks, 1299 would slow down the W83781D access and should not be necessary. 1300 There are some ugly typecasts here, but the good news is - they should 1301 nowhere else be necessary! */ 1302static int 1303w83781d_read_value(struct w83781d_data *data, u16 reg) 1304{ 1305 struct i2c_client *client = &data->client; 1306 int res, word_sized, bank; 1307 struct i2c_client *cl; 1308 1309 mutex_lock(&data->lock); 1310 if (!client->driver) { /* ISA device */ 1311 word_sized = (((reg & 0xff00) == 0x100) 1312 || ((reg & 0xff00) == 0x200)) 1313 && (((reg & 0x00ff) == 0x50) 1314 || ((reg & 0x00ff) == 0x53) 1315 || ((reg & 0x00ff) == 0x55)); 1316 if (reg & 0xff00) { 1317 outb_p(W83781D_REG_BANK, 1318 client->addr + W83781D_ADDR_REG_OFFSET); 1319 outb_p(reg >> 8, 1320 client->addr + W83781D_DATA_REG_OFFSET); 1321 } 1322 outb_p(reg & 0xff, client->addr + W83781D_ADDR_REG_OFFSET); 1323 res = inb_p(client->addr + W83781D_DATA_REG_OFFSET); 1324 if (word_sized) { 1325 outb_p((reg & 0xff) + 1, 1326 client->addr + W83781D_ADDR_REG_OFFSET); 1327 res = 1328 (res << 8) + inb_p(client->addr + 1329 W83781D_DATA_REG_OFFSET); 1330 } 1331 if (reg & 0xff00) { 1332 outb_p(W83781D_REG_BANK, 1333 client->addr + W83781D_ADDR_REG_OFFSET); 1334 outb_p(0, client->addr + W83781D_DATA_REG_OFFSET); 1335 } 1336 } else { 1337 bank = (reg >> 8) & 0x0f; 1338 if (bank > 2) 1339 /* switch banks */ 1340 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 1341 bank); 1342 if (bank == 0 || bank > 2) { 1343 res = i2c_smbus_read_byte_data(client, reg & 0xff); 1344 } else { 1345 /* switch to subclient */ 1346 cl = data->lm75[bank - 1]; 1347 /* convert from ISA to LM75 I2C addresses */ 1348 switch (reg & 0xff) { 1349 case 0x50: /* TEMP */ 1350 res = swab16(i2c_smbus_read_word_data(cl, 0)); 1351 break; 1352 case 0x52: /* CONFIG */ 1353 res = i2c_smbus_read_byte_data(cl, 1); 1354 break; 1355 case 0x53: /* HYST */ 1356 res = swab16(i2c_smbus_read_word_data(cl, 2)); 1357 break; 1358 case 0x55: /* OVER */ 1359 default: 1360 res = swab16(i2c_smbus_read_word_data(cl, 3)); 1361 break; 1362 } 1363 } 1364 if (bank > 2) 1365 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0); 1366 } 1367 mutex_unlock(&data->lock); 1368 return res; 1369} 1370 1371static int 1372w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value) 1373{ 1374 struct i2c_client *client = &data->client; 1375 int word_sized, bank; 1376 struct i2c_client *cl; 1377 1378 mutex_lock(&data->lock); 1379 if (!client->driver) { /* ISA device */ 1380 word_sized = (((reg & 0xff00) == 0x100) 1381 || ((reg & 0xff00) == 0x200)) 1382 && (((reg & 0x00ff) == 0x53) 1383 || ((reg & 0x00ff) == 0x55)); 1384 if (reg & 0xff00) { 1385 outb_p(W83781D_REG_BANK, 1386 client->addr + W83781D_ADDR_REG_OFFSET); 1387 outb_p(reg >> 8, 1388 client->addr + W83781D_DATA_REG_OFFSET); 1389 } 1390 outb_p(reg & 0xff, client->addr + W83781D_ADDR_REG_OFFSET); 1391 if (word_sized) { 1392 outb_p(value >> 8, 1393 client->addr + W83781D_DATA_REG_OFFSET); 1394 outb_p((reg & 0xff) + 1, 1395 client->addr + W83781D_ADDR_REG_OFFSET); 1396 } 1397 outb_p(value & 0xff, client->addr + W83781D_DATA_REG_OFFSET); 1398 if (reg & 0xff00) { 1399 outb_p(W83781D_REG_BANK, 1400 client->addr + W83781D_ADDR_REG_OFFSET); 1401 outb_p(0, client->addr + W83781D_DATA_REG_OFFSET); 1402 } 1403 } else { 1404 bank = (reg >> 8) & 0x0f; 1405 if (bank > 2) 1406 /* switch banks */ 1407 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 1408 bank); 1409 if (bank == 0 || bank > 2) { 1410 i2c_smbus_write_byte_data(client, reg & 0xff, 1411 value & 0xff); 1412 } else { 1413 /* switch to subclient */ 1414 cl = data->lm75[bank - 1]; 1415 /* convert from ISA to LM75 I2C addresses */ 1416 switch (reg & 0xff) { 1417 case 0x52: /* CONFIG */ 1418 i2c_smbus_write_byte_data(cl, 1, value & 0xff); 1419 break; 1420 case 0x53: /* HYST */ 1421 i2c_smbus_write_word_data(cl, 2, swab16(value)); 1422 break; 1423 case 0x55: /* OVER */ 1424 i2c_smbus_write_word_data(cl, 3, swab16(value)); 1425 break; 1426 } 1427 } 1428 if (bank > 2) 1429 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0); 1430 } 1431 mutex_unlock(&data->lock); 1432 return 0; 1433} 1434 1435static void 1436w83781d_init_device(struct device *dev) 1437{ 1438 struct w83781d_data *data = dev_get_drvdata(dev); 1439 int i, p; 1440 int type = data->type; 1441 u8 tmp; 1442 1443 if (type == w83627hf) 1444 dev_info(dev, "The W83627HF chip is better supported by the " 1445 "w83627hf driver, support will be dropped from the " 1446 "w83781d driver soon\n"); 1447 1448 if (reset && type != as99127f) { /* this resets registers we don't have 1449 documentation for on the as99127f */ 1450 /* Resetting the chip has been the default for a long time, 1451 but it causes the BIOS initializations (fan clock dividers, 1452 thermal sensor types...) to be lost, so it is now optional. 1453 It might even go away if nobody reports it as being useful, 1454 as I see very little reason why this would be needed at 1455 all. */ 1456 dev_info(dev, "If reset=1 solved a problem you were " 1457 "having, please report!\n"); 1458 1459 /* save these registers */ 1460 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG); 1461 p = w83781d_read_value(data, W83781D_REG_PWMCLK12); 1462 /* Reset all except Watchdog values and last conversion values 1463 This sets fan-divs to 2, among others */ 1464 w83781d_write_value(data, W83781D_REG_CONFIG, 0x80); 1465 /* Restore the registers and disable power-on abnormal beep. 1466 This saves FAN 1/2/3 input/output values set by BIOS. */ 1467 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80); 1468 w83781d_write_value(data, W83781D_REG_PWMCLK12, p); 1469 /* Disable master beep-enable (reset turns it on). 1470 Individual beep_mask should be reset to off but for some reason 1471 disabling this bit helps some people not get beeped */ 1472 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, 0); 1473 } 1474 1475 /* Disable power-on abnormal beep, as advised by the datasheet. 1476 Already done if reset=1. */ 1477 if (init && !reset && type != as99127f) { 1478 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG); 1479 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80); 1480 } 1481 1482 data->vrm = vid_which_vrm(); 1483 1484 if ((type != w83781d) && (type != as99127f)) { 1485 tmp = w83781d_read_value(data, W83781D_REG_SCFG1); 1486 for (i = 1; i <= 3; i++) { 1487 if (!(tmp & BIT_SCFG1[i - 1])) { 1488 data->sens[i - 1] = W83781D_DEFAULT_BETA; 1489 } else { 1490 if (w83781d_read_value 1491 (data, 1492 W83781D_REG_SCFG2) & BIT_SCFG2[i - 1]) 1493 data->sens[i - 1] = 1; 1494 else 1495 data->sens[i - 1] = 2; 1496 } 1497 if (type == w83783s && i == 2) 1498 break; 1499 } 1500 } 1501 1502 if (init && type != as99127f) { 1503 /* Enable temp2 */ 1504 tmp = w83781d_read_value(data, W83781D_REG_TEMP2_CONFIG); 1505 if (tmp & 0x01) { 1506 dev_warn(dev, "Enabling temp2, readings " 1507 "might not make sense\n"); 1508 w83781d_write_value(data, W83781D_REG_TEMP2_CONFIG, 1509 tmp & 0xfe); 1510 } 1511 1512 /* Enable temp3 */ 1513 if (type != w83783s) { 1514 tmp = w83781d_read_value(data, 1515 W83781D_REG_TEMP3_CONFIG); 1516 if (tmp & 0x01) { 1517 dev_warn(dev, "Enabling temp3, " 1518 "readings might not make sense\n"); 1519 w83781d_write_value(data, 1520 W83781D_REG_TEMP3_CONFIG, tmp & 0xfe); 1521 } 1522 } 1523 } 1524 1525 /* Start monitoring */ 1526 w83781d_write_value(data, W83781D_REG_CONFIG, 1527 (w83781d_read_value(data, 1528 W83781D_REG_CONFIG) & 0xf7) 1529 | 0x01); 1530 1531 /* A few vars need to be filled upon startup */ 1532 for (i = 0; i < 3; i++) { 1533 data->fan_min[i] = w83781d_read_value(data, 1534 W83781D_REG_FAN_MIN(i)); 1535 } 1536 1537 mutex_init(&data->update_lock); 1538} 1539 1540static struct w83781d_data *w83781d_update_device(struct device *dev) 1541{ 1542 struct w83781d_data *data = dev_get_drvdata(dev); 1543 struct i2c_client *client = &data->client; 1544 int i; 1545 1546 mutex_lock(&data->update_lock); 1547 1548 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 1549 || !data->valid) { 1550 dev_dbg(dev, "Starting device update\n"); 1551 1552 for (i = 0; i <= 8; i++) { 1553 if (data->type == w83783s && i == 1) 1554 continue; /* 783S has no in1 */ 1555 data->in[i] = 1556 w83781d_read_value(data, W83781D_REG_IN(i)); 1557 data->in_min[i] = 1558 w83781d_read_value(data, W83781D_REG_IN_MIN(i)); 1559 data->in_max[i] = 1560 w83781d_read_value(data, W83781D_REG_IN_MAX(i)); 1561 if ((data->type != w83782d) 1562 && (data->type != w83627hf) && (i == 6)) 1563 break; 1564 } 1565 for (i = 0; i < 3; i++) { 1566 data->fan[i] = 1567 w83781d_read_value(data, W83781D_REG_FAN(i)); 1568 data->fan_min[i] = 1569 w83781d_read_value(data, W83781D_REG_FAN_MIN(i)); 1570 } 1571 if (data->type != w83781d && data->type != as99127f) { 1572 for (i = 0; i < 4; i++) { 1573 data->pwm[i] = 1574 w83781d_read_value(data, 1575 W83781D_REG_PWM[i]); 1576 if ((data->type != w83782d || !client->driver) 1577 && i == 1) 1578 break; 1579 } 1580 /* Only PWM2 can be disabled */ 1581 data->pwm2_enable = (w83781d_read_value(data, 1582 W83781D_REG_PWMCLK12) & 0x08) >> 3; 1583 } 1584 1585 data->temp = w83781d_read_value(data, W83781D_REG_TEMP(1)); 1586 data->temp_max = 1587 w83781d_read_value(data, W83781D_REG_TEMP_OVER(1)); 1588 data->temp_max_hyst = 1589 w83781d_read_value(data, W83781D_REG_TEMP_HYST(1)); 1590 data->temp_add[0] = 1591 w83781d_read_value(data, W83781D_REG_TEMP(2)); 1592 data->temp_max_add[0] = 1593 w83781d_read_value(data, W83781D_REG_TEMP_OVER(2)); 1594 data->temp_max_hyst_add[0] = 1595 w83781d_read_value(data, W83781D_REG_TEMP_HYST(2)); 1596 if (data->type != w83783s) { 1597 data->temp_add[1] = 1598 w83781d_read_value(data, W83781D_REG_TEMP(3)); 1599 data->temp_max_add[1] = 1600 w83781d_read_value(data, 1601 W83781D_REG_TEMP_OVER(3)); 1602 data->temp_max_hyst_add[1] = 1603 w83781d_read_value(data, 1604 W83781D_REG_TEMP_HYST(3)); 1605 } 1606 i = w83781d_read_value(data, W83781D_REG_VID_FANDIV); 1607 data->vid = i & 0x0f; 1608 data->vid |= (w83781d_read_value(data, 1609 W83781D_REG_CHIPID) & 0x01) << 4; 1610 data->fan_div[0] = (i >> 4) & 0x03; 1611 data->fan_div[1] = (i >> 6) & 0x03; 1612 data->fan_div[2] = (w83781d_read_value(data, 1613 W83781D_REG_PIN) >> 6) & 0x03; 1614 if ((data->type != w83781d) && (data->type != as99127f)) { 1615 i = w83781d_read_value(data, W83781D_REG_VBAT); 1616 data->fan_div[0] |= (i >> 3) & 0x04; 1617 data->fan_div[1] |= (i >> 4) & 0x04; 1618 data->fan_div[2] |= (i >> 5) & 0x04; 1619 } 1620 if ((data->type == w83782d) || (data->type == w83627hf)) { 1621 data->alarms = w83781d_read_value(data, 1622 W83782D_REG_ALARM1) 1623 | (w83781d_read_value(data, 1624 W83782D_REG_ALARM2) << 8) 1625 | (w83781d_read_value(data, 1626 W83782D_REG_ALARM3) << 16); 1627 } else if (data->type == w83783s) { 1628 data->alarms = w83781d_read_value(data, 1629 W83782D_REG_ALARM1) 1630 | (w83781d_read_value(data, 1631 W83782D_REG_ALARM2) << 8); 1632 } else { 1633 /* No real-time status registers, fall back to 1634 interrupt status registers */ 1635 data->alarms = w83781d_read_value(data, 1636 W83781D_REG_ALARM1) 1637 | (w83781d_read_value(data, 1638 W83781D_REG_ALARM2) << 8); 1639 } 1640 i = w83781d_read_value(data, W83781D_REG_BEEP_INTS2); 1641 data->beep_enable = i >> 7; 1642 data->beep_mask = ((i & 0x7f) << 8) + 1643 w83781d_read_value(data, W83781D_REG_BEEP_INTS1); 1644 if ((data->type != w83781d) && (data->type != as99127f)) { 1645 data->beep_mask |= 1646 w83781d_read_value(data, 1647 W83781D_REG_BEEP_INTS3) << 16; 1648 } 1649 data->last_updated = jiffies; 1650 data->valid = 1; 1651 } 1652 1653 mutex_unlock(&data->update_lock); 1654 1655 return data; 1656} 1657 1658/* return 1 if a supported chip is found, 0 otherwise */ 1659static int __init 1660w83781d_isa_found(unsigned short address) 1661{ 1662 int val, save, found = 0; 1663 1664 if (!request_region(address, W83781D_EXTENT, "w83781d")) 1665 return 0; 1666 1667#define REALLY_SLOW_IO 1668 /* We need the timeouts for at least some W83781D-like 1669 chips. But only if we read 'undefined' registers. */ 1670 val = inb_p(address + 1); 1671 if (inb_p(address + 2) != val 1672 || inb_p(address + 3) != val 1673 || inb_p(address + 7) != val) { 1674 pr_debug("w83781d: Detection failed at step 1\n"); 1675 goto release; 1676 } 1677#undef REALLY_SLOW_IO 1678 1679 /* We should be able to change the 7 LSB of the address port. The 1680 MSB (busy flag) should be clear initially, set after the write. */ 1681 save = inb_p(address + W83781D_ADDR_REG_OFFSET); 1682 if (save & 0x80) { 1683 pr_debug("w83781d: Detection failed at step 2\n"); 1684 goto release; 1685 } 1686 val = ~save & 0x7f; 1687 outb_p(val, address + W83781D_ADDR_REG_OFFSET); 1688 if (inb_p(address + W83781D_ADDR_REG_OFFSET) != (val | 0x80)) { 1689 outb_p(save, address + W83781D_ADDR_REG_OFFSET); 1690 pr_debug("w83781d: Detection failed at step 3\n"); 1691 goto release; 1692 } 1693 1694 /* We found a device, now see if it could be a W83781D */ 1695 outb_p(W83781D_REG_CONFIG, address + W83781D_ADDR_REG_OFFSET); 1696 val = inb_p(address + W83781D_DATA_REG_OFFSET); 1697 if (val & 0x80) { 1698 pr_debug("w83781d: Detection failed at step 4\n"); 1699 goto release; 1700 } 1701 outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET); 1702 save = inb_p(address + W83781D_DATA_REG_OFFSET); 1703 outb_p(W83781D_REG_CHIPMAN, address + W83781D_ADDR_REG_OFFSET); 1704 val = inb_p(address + W83781D_DATA_REG_OFFSET); 1705 if ((!(save & 0x80) && (val != 0xa3)) 1706 || ((save & 0x80) && (val != 0x5c))) { 1707 pr_debug("w83781d: Detection failed at step 5\n"); 1708 goto release; 1709 } 1710 outb_p(W83781D_REG_I2C_ADDR, address + W83781D_ADDR_REG_OFFSET); 1711 val = inb_p(address + W83781D_DATA_REG_OFFSET); 1712 if (val < 0x03 || val > 0x77) { /* Not a valid I2C address */ 1713 pr_debug("w83781d: Detection failed at step 6\n"); 1714 goto release; 1715 } 1716 1717 /* The busy flag should be clear again */ 1718 if (inb_p(address + W83781D_ADDR_REG_OFFSET) & 0x80) { 1719 pr_debug("w83781d: Detection failed at step 7\n"); 1720 goto release; 1721 } 1722 1723 /* Determine the chip type */ 1724 outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET); 1725 save = inb_p(address + W83781D_DATA_REG_OFFSET); 1726 outb_p(save & 0xf8, address + W83781D_DATA_REG_OFFSET); 1727 outb_p(W83781D_REG_WCHIPID, address + W83781D_ADDR_REG_OFFSET); 1728 val = inb_p(address + W83781D_DATA_REG_OFFSET); 1729 if ((val & 0xfe) == 0x10 /* W83781D */ 1730 || val == 0x30 /* W83782D */ 1731 || val == 0x21) /* W83627HF */ 1732 found = 1; 1733 1734 if (found) 1735 pr_info("w83781d: Found a %s chip at %#x\n", 1736 val == 0x21 ? "W83627HF" : 1737 val == 0x30 ? "W83782D" : "W83781D", (int)address); 1738 1739 release: 1740 release_region(address, W83781D_EXTENT); 1741 return found; 1742} 1743 1744static int __init 1745w83781d_isa_device_add(unsigned short address) 1746{ 1747 struct resource res = { 1748 .start = address, 1749 .end = address + W83781D_EXTENT, 1750 .name = "w83781d", 1751 .flags = IORESOURCE_IO, 1752 }; 1753 int err; 1754 1755 pdev = platform_device_alloc("w83781d", address); 1756 if (!pdev) { 1757 err = -ENOMEM; 1758 printk(KERN_ERR "w83781d: Device allocation failed\n"); 1759 goto exit; 1760 } 1761 1762 err = platform_device_add_resources(pdev, &res, 1); 1763 if (err) { 1764 printk(KERN_ERR "w83781d: Device resource addition failed " 1765 "(%d)\n", err); 1766 goto exit_device_put; 1767 } 1768 1769 err = platform_device_add(pdev); 1770 if (err) { 1771 printk(KERN_ERR "w83781d: Device addition failed (%d)\n", 1772 err); 1773 goto exit_device_put; 1774 } 1775 1776 return 0; 1777 1778 exit_device_put: 1779 platform_device_put(pdev); 1780 exit: 1781 pdev = NULL; 1782 return err; 1783} 1784 1785static int __init 1786sensors_w83781d_init(void) 1787{ 1788 int res; 1789 1790 res = i2c_add_driver(&w83781d_driver); 1791 if (res) 1792 goto exit; 1793 1794 if (w83781d_isa_found(isa_address)) { 1795 res = platform_driver_register(&w83781d_isa_driver); 1796 if (res) 1797 goto exit_unreg_i2c_driver; 1798 1799 /* Sets global pdev as a side effect */ 1800 res = w83781d_isa_device_add(isa_address); 1801 if (res) 1802 goto exit_unreg_isa_driver; 1803 } 1804 1805 return 0; 1806 1807 exit_unreg_isa_driver: 1808 platform_driver_unregister(&w83781d_isa_driver); 1809 exit_unreg_i2c_driver: 1810 i2c_del_driver(&w83781d_driver); 1811 exit: 1812 return res; 1813} 1814 1815static void __exit 1816sensors_w83781d_exit(void) 1817{ 1818 if (pdev) { 1819 platform_device_unregister(pdev); 1820 platform_driver_unregister(&w83781d_isa_driver); 1821 } 1822 i2c_del_driver(&w83781d_driver); 1823} 1824 1825MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 1826 "Philip Edelbrock <phil@netroedge.com>, " 1827 "and Mark Studebaker <mdsxyz123@yahoo.com>"); 1828MODULE_DESCRIPTION("W83781D driver"); 1829MODULE_LICENSE("GPL"); 1830 1831module_init(sensors_w83781d_init); 1832module_exit(sensors_w83781d_exit); 1833