drivers/hwmon/w83781d.c

   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 - 2008  Jean Delvare <jdelvare@suse.de>
   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  * w83782d      9       3       2-4     3       0x30    0x5ca3  yes     yes
  32  * w83783s      5-6     3       2       1-2     0x40    0x5ca3  yes     no
  33  *
  34  */
  35
  36 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  37
  38 #include <linux/module.h>
  39 #include <linux/init.h>
  40 #include <linux/slab.h>
  41 #include <linux/jiffies.h>
  42 #include <linux/i2c.h>
  43 #include <linux/hwmon.h>
  44 #include <linux/hwmon-vid.h>
  45 #include <linux/hwmon-sysfs.h>
  46 #include <linux/sysfs.h>
  47 #include <linux/err.h>
  48 #include <linux/mutex.h>
  49
  50 #ifdef CONFIG_ISA
  51 #include <linux/platform_device.h>
  52 #include <linux/ioport.h>
  53 #include <linux/io.h>
  54 #endif
  55
  56 #include "lm75.h"
  57
  58 /* Addresses to scan */
  59 static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
  60                                                 0x2e, 0x2f, I2C_CLIENT_END };
  61
  62 enum chips { w83781d, w83782d, w83783s, as99127f };
  63
  64 /* Insmod parameters */
  65 static unsigned short force_subclients[4];
  66 module_param_array(force_subclients, short, NULL, 0);
  67 MODULE_PARM_DESC(force_subclients,
  68                  "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");
  69
  70 static bool reset;
  71 module_param(reset, bool, 0);
  72 MODULE_PARM_DESC(reset, "Set to one to reset chip on load");
  73
  74 static bool init = 1;
  75 module_param(init, bool, 0);
  76 MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization");
  77
  78 /* Constants specified below */
  79
  80 /* Length of ISA address segment */
  81 #define W83781D_EXTENT                  8
  82
  83 /* Where are the ISA address/data registers relative to the base address */
  84 #define W83781D_ADDR_REG_OFFSET         5
  85 #define W83781D_DATA_REG_OFFSET         6
  86
  87 /* The device registers */
  88 /* in nr from 0 to 8 */
  89 #define W83781D_REG_IN_MAX(nr)          ((nr < 7) ? (0x2b + (nr) * 2) : \
  90                                                     (0x554 + (((nr) - 7) * 2)))
  91 #define W83781D_REG_IN_MIN(nr)          ((nr < 7) ? (0x2c + (nr) * 2) : \
  92                                                     (0x555 + (((nr) - 7) * 2)))
  93 #define W83781D_REG_IN(nr)              ((nr < 7) ? (0x20 + (nr)) : \
  94                                                     (0x550 + (nr) - 7))
  95
  96 /* fan nr from 0 to 2 */
  97 #define W83781D_REG_FAN_MIN(nr)         (0x3b + (nr))
  98 #define W83781D_REG_FAN(nr)             (0x28 + (nr))
  99
 100 #define W83781D_REG_BANK                0x4E
 101 #define W83781D_REG_TEMP2_CONFIG        0x152
 102 #define W83781D_REG_TEMP3_CONFIG        0x252
 103 /* temp nr from 1 to 3 */
 104 #define W83781D_REG_TEMP(nr)            ((nr == 3) ? (0x0250) : \
 105                                         ((nr == 2) ? (0x0150) : \
 106                                                      (0x27)))
 107 #define W83781D_REG_TEMP_HYST(nr)       ((nr == 3) ? (0x253) : \
 108                                         ((nr == 2) ? (0x153) : \
 109                                                      (0x3A)))
 110 #define W83781D_REG_TEMP_OVER(nr)       ((nr == 3) ? (0x255) : \
 111                                         ((nr == 2) ? (0x155) : \
 112                                                      (0x39)))
 113
 114 #define W83781D_REG_CONFIG              0x40
 115
 116 /* Interrupt status (W83781D, AS99127F) */
 117 #define W83781D_REG_ALARM1              0x41
 118 #define W83781D_REG_ALARM2              0x42
 119
 120 /* Real-time status (W83782D, W83783S) */
 121 #define W83782D_REG_ALARM1              0x459
 122 #define W83782D_REG_ALARM2              0x45A
 123 #define W83782D_REG_ALARM3              0x45B
 124
 125 #define W83781D_REG_BEEP_CONFIG         0x4D
 126 #define W83781D_REG_BEEP_INTS1          0x56
 127 #define W83781D_REG_BEEP_INTS2          0x57
 128 #define W83781D_REG_BEEP_INTS3          0x453   /* not on W83781D */
 129
 130 #define W83781D_REG_VID_FANDIV          0x47
 131
 132 #define W83781D_REG_CHIPID              0x49
 133 #define W83781D_REG_WCHIPID             0x58
 134 #define W83781D_REG_CHIPMAN             0x4F
 135 #define W83781D_REG_PIN                 0x4B
 136
 137 /* 782D/783S only */
 138 #define W83781D_REG_VBAT                0x5D
 139
 140 /* PWM 782D (1-4) and 783S (1-2) only */
 141 static const u8 W83781D_REG_PWM[] = { 0x5B, 0x5A, 0x5E, 0x5F };
 142 #define W83781D_REG_PWMCLK12            0x5C
 143 #define W83781D_REG_PWMCLK34            0x45C
 144
 145 #define W83781D_REG_I2C_ADDR            0x48
 146 #define W83781D_REG_I2C_SUBADDR         0x4A
 147
 148 /*
 149  * The following are undocumented in the data sheets however we
 150  * received the information in an email from Winbond tech support
 151  */
 152 /* Sensor selection - not on 781d */
 153 #define W83781D_REG_SCFG1               0x5D
 154 static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 };
 155
 156 #define W83781D_REG_SCFG2               0x59
 157 static const u8 BIT_SCFG2[] = { 0x10, 0x20, 0x40 };
 158
 159 #define W83781D_DEFAULT_BETA            3435
 160
 161 /* Conversions */
 162 #define IN_TO_REG(val)                  clamp_val(((val) + 8) / 16, 0, 255)
 163 #define IN_FROM_REG(val)                ((val) * 16)
 164
 165 static inline u8
 166 FAN_TO_REG(long rpm, int div)
 167 {
 168         if (rpm == 0)
 169                 return 255;
 170         rpm = clamp_val(rpm, 1, 1000000);
 171         return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
 172 }
 173
 174 static inline long
 175 FAN_FROM_REG(u8 val, int div)
 176 {
 177         if (val == 0)
 178                 return -1;
 179         if (val == 255)
 180                 return 0;
 181         return 1350000 / (val * div);
 182 }
 183
 184 #define TEMP_TO_REG(val)                clamp_val((val) / 1000, -127, 128)
 185 #define TEMP_FROM_REG(val)              ((val) * 1000)
 186
 187 #define BEEP_MASK_FROM_REG(val, type)   ((type) == as99127f ? \
 188                                          (~(val)) & 0x7fff : (val) & 0xff7fff)
 189 #define BEEP_MASK_TO_REG(val, type)     ((type) == as99127f ? \
 190                                          (~(val)) & 0x7fff : (val) & 0xff7fff)
 191
 192 #define DIV_FROM_REG(val)               (1 << (val))
 193
 194 static inline u8
 195 DIV_TO_REG(long val, enum chips type)
 196 {
 197         int i;
 198         val = clamp_val(val, 1,
 199                         ((type == w83781d || 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 struct w83781d_data {
 209         struct i2c_client *client;
 210         struct device *hwmon_dev;
 211         struct mutex lock;
 212         enum chips type;
 213
 214         /* For ISA device only */
 215         const char *name;
 216         int isa_addr;
 217
 218         struct mutex update_lock;
 219         char valid;             /* !=0 if following fields are valid */
 220         unsigned long last_updated;     /* In jiffies */
 221
 222         struct i2c_client *lm75[2];     /* for secondary I2C addresses */
 223         /* array of 2 pointers to subclients */
 224
 225         u8 in[9];               /* Register value - 8 & 9 for 782D only */
 226         u8 in_max[9];           /* Register value - 8 & 9 for 782D only */
 227         u8 in_min[9];           /* Register value - 8 & 9 for 782D only */
 228         u8 fan[3];              /* Register value */
 229         u8 fan_min[3];          /* Register value */
 230         s8 temp;                /* Register value */
 231         s8 temp_max;            /* Register value */
 232         s8 temp_max_hyst;       /* Register value */
 233         u16 temp_add[2];        /* Register value */
 234         u16 temp_max_add[2];    /* Register value */
 235         u16 temp_max_hyst_add[2];       /* Register value */
 236         u8 fan_div[3];          /* Register encoding, shifted right */
 237         u8 vid;                 /* Register encoding, combined */
 238         u32 alarms;             /* Register encoding, combined */
 239         u32 beep_mask;          /* Register encoding, combined */
 240         u8 pwm[4];              /* Register value */
 241         u8 pwm2_enable;         /* Boolean */
 242         u16 sens[3];            /*
 243                                  * 782D/783S only.
 244                                  * 1 = pentium diode; 2 = 3904 diode;
 245                                  * 4 = thermistor
 246                                  */
 247         u8 vrm;
 248 };
 249
 250 static struct w83781d_data *w83781d_data_if_isa(void);
 251 static int w83781d_alias_detect(struct i2c_client *client, u8 chipid);
 252
 253 static int w83781d_read_value(struct w83781d_data *data, u16 reg);
 254 static int w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value);
 255 static struct w83781d_data *w83781d_update_device(struct device *dev);
 256 static void w83781d_init_device(struct device *dev);
 257
 258 /* following are the sysfs callback functions */
 259 #define show_in_reg(reg) \
 260 static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \
 261                 char *buf) \
 262 { \
 263         struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 264         struct w83781d_data *data = w83781d_update_device(dev); \
 265         return sprintf(buf, "%ld\n", \
 266                        (long)IN_FROM_REG(data->reg[attr->index])); \
 267 }
 268 show_in_reg(in);
 269 show_in_reg(in_min);
 270 show_in_reg(in_max);
 271
 272 #define store_in_reg(REG, reg) \
 273 static ssize_t store_in_##reg(struct device *dev, struct device_attribute \
 274                 *da, const char *buf, size_t count) \
 275 { \
 276         struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 277         struct w83781d_data *data = dev_get_drvdata(dev); \
 278         int nr = attr->index; \
 279         unsigned long val; \
 280         int err = kstrtoul(buf, 10, &val); \
 281         if (err) \
 282                 return err; \
 283         mutex_lock(&data->update_lock); \
 284         data->in_##reg[nr] = IN_TO_REG(val); \
 285         w83781d_write_value(data, W83781D_REG_IN_##REG(nr), \
 286                             data->in_##reg[nr]); \
 287         \
 288         mutex_unlock(&data->update_lock); \
 289         return count; \
 290 }
 291 store_in_reg(MIN, min);
 292 store_in_reg(MAX, max);
 293
 294 #define sysfs_in_offsets(offset) \
 295 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
 296                 show_in, NULL, offset); \
 297 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
 298                 show_in_min, store_in_min, offset); \
 299 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
 300                 show_in_max, store_in_max, offset)
 301
 302 sysfs_in_offsets(0);
 303 sysfs_in_offsets(1);
 304 sysfs_in_offsets(2);
 305 sysfs_in_offsets(3);
 306 sysfs_in_offsets(4);
 307 sysfs_in_offsets(5);
 308 sysfs_in_offsets(6);
 309 sysfs_in_offsets(7);
 310 sysfs_in_offsets(8);
 311
 312 #define show_fan_reg(reg) \
 313 static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \
 314                 char *buf) \
 315 { \
 316         struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 317         struct w83781d_data *data = w83781d_update_device(dev); \
 318         return sprintf(buf, "%ld\n", \
 319                 FAN_FROM_REG(data->reg[attr->index], \
 320                         DIV_FROM_REG(data->fan_div[attr->index]))); \
 321 }
 322 show_fan_reg(fan);
 323 show_fan_reg(fan_min);
 324
 325 static ssize_t
 326 store_fan_min(struct device *dev, struct device_attribute *da,
 327                 const char *buf, size_t count)
 328 {
 329         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 330         struct w83781d_data *data = dev_get_drvdata(dev);
 331         int nr = attr->index;
 332         unsigned long val;
 333         int err;
 334
 335         err = kstrtoul(buf, 10, &val);
 336         if (err)
 337                 return err;
 338
 339         mutex_lock(&data->update_lock);
 340         data->fan_min[nr] =
 341             FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 342         w83781d_write_value(data, W83781D_REG_FAN_MIN(nr),
 343                             data->fan_min[nr]);
 344
 345         mutex_unlock(&data->update_lock);
 346         return count;
 347 }
 348
 349 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 350 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
 351                 show_fan_min, store_fan_min, 0);
 352 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
 353 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
 354                 show_fan_min, store_fan_min, 1);
 355 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
 356 static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO | S_IWUSR,
 357                 show_fan_min, store_fan_min, 2);
 358
 359 #define show_temp_reg(reg) \
 360 static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \
 361                 char *buf) \
 362 { \
 363         struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 364         struct w83781d_data *data = w83781d_update_device(dev); \
 365         int nr = attr->index; \
 366         if (nr >= 2) {  /* TEMP2 and TEMP3 */ \
 367                 return sprintf(buf, "%d\n", \
 368                         LM75_TEMP_FROM_REG(data->reg##_add[nr-2])); \
 369         } else {        /* TEMP1 */ \
 370                 return sprintf(buf, "%ld\n", (long)TEMP_FROM_REG(data->reg)); \
 371         } \
 372 }
 373 show_temp_reg(temp);
 374 show_temp_reg(temp_max);
 375 show_temp_reg(temp_max_hyst);
 376
 377 #define store_temp_reg(REG, reg) \
 378 static ssize_t store_temp_##reg(struct device *dev, \
 379                 struct device_attribute *da, const char *buf, size_t count) \
 380 { \
 381         struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 382         struct w83781d_data *data = dev_get_drvdata(dev); \
 383         int nr = attr->index; \
 384         long val; \
 385         int err = kstrtol(buf, 10, &val); \
 386         if (err) \
 387                 return err; \
 388         mutex_lock(&data->update_lock); \
 389          \
 390         if (nr >= 2) {  /* TEMP2 and TEMP3 */ \
 391                 data->temp_##reg##_add[nr-2] = LM75_TEMP_TO_REG(val); \
 392                 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \
 393                                 data->temp_##reg##_add[nr-2]); \
 394         } else {        /* TEMP1 */ \
 395                 data->temp_##reg = TEMP_TO_REG(val); \
 396                 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \
 397                         data->temp_##reg); \
 398         } \
 399          \
 400         mutex_unlock(&data->update_lock); \
 401         return count; \
 402 }
 403 store_temp_reg(OVER, max);
 404 store_temp_reg(HYST, max_hyst);
 405
 406 #define sysfs_temp_offsets(offset) \
 407 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
 408                 show_temp, NULL, offset); \
 409 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
 410                 show_temp_max, store_temp_max, offset); \
 411 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
 412                 show_temp_max_hyst, store_temp_max_hyst, offset);
 413
 414 sysfs_temp_offsets(1);
 415 sysfs_temp_offsets(2);
 416 sysfs_temp_offsets(3);
 417
 418 static ssize_t
 419 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
 420 {
 421         struct w83781d_data *data = w83781d_update_device(dev);
 422         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
 423 }
 424
 425 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
 426
 427 static ssize_t
 428 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
 429 {
 430         struct w83781d_data *data = dev_get_drvdata(dev);
 431         return sprintf(buf, "%ld\n", (long) data->vrm);
 432 }
 433
 434 static ssize_t
 435 store_vrm_reg(struct device *dev, struct device_attribute *attr,
 436               const char *buf, size_t count)
 437 {
 438         struct w83781d_data *data = dev_get_drvdata(dev);
 439         unsigned long val;
 440         int err;
 441
 442         err = kstrtoul(buf, 10, &val);
 443         if (err)
 444                 return err;
 445         data->vrm = clamp_val(val, 0, 255);
 446
 447         return count;
 448 }
 449
 450 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
 451
 452 static ssize_t
 453 show_alarms_reg(struct device *dev, struct device_attribute *attr, char *buf)
 454 {
 455         struct w83781d_data *data = w83781d_update_device(dev);
 456         return sprintf(buf, "%u\n", data->alarms);
 457 }
 458
 459 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
 460
 461 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
 462                 char *buf)
 463 {
 464         struct w83781d_data *data = w83781d_update_device(dev);
 465         int bitnr = to_sensor_dev_attr(attr)->index;
 466         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 467 }
 468
 469 /* The W83781D has a single alarm bit for temp2 and temp3 */
 470 static ssize_t show_temp3_alarm(struct device *dev,
 471                 struct device_attribute *attr, char *buf)
 472 {
 473         struct w83781d_data *data = w83781d_update_device(dev);
 474         int bitnr = (data->type == w83781d) ? 5 : 13;
 475         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 476 }
 477
 478 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 479 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 480 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 481 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 482 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
 483 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
 484 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10);
 485 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 16);
 486 static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 17);
 487 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
 488 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
 489 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11);
 490 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
 491 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
 492 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_temp3_alarm, NULL, 0);
 493
 494 static ssize_t show_beep_mask(struct device *dev,
 495                                struct device_attribute *attr, char *buf)
 496 {
 497         struct w83781d_data *data = w83781d_update_device(dev);
 498         return sprintf(buf, "%ld\n",
 499                        (long)BEEP_MASK_FROM_REG(data->beep_mask, data->type));
 500 }
 501
 502 static ssize_t
 503 store_beep_mask(struct device *dev, struct device_attribute *attr,
 504                 const char *buf, size_t count)
 505 {
 506         struct w83781d_data *data = dev_get_drvdata(dev);
 507         unsigned long val;
 508         int err;
 509
 510         err = kstrtoul(buf, 10, &val);
 511         if (err)
 512                 return err;
 513
 514         mutex_lock(&data->update_lock);
 515         data->beep_mask &= 0x8000; /* preserve beep enable */
 516         data->beep_mask |= BEEP_MASK_TO_REG(val, data->type);
 517         w83781d_write_value(data, W83781D_REG_BEEP_INTS1,
 518                             data->beep_mask & 0xff);
 519         w83781d_write_value(data, W83781D_REG_BEEP_INTS2,
 520                             (data->beep_mask >> 8) & 0xff);
 521         if (data->type != w83781d && data->type != as99127f) {
 522                 w83781d_write_value(data, W83781D_REG_BEEP_INTS3,
 523                                     ((data->beep_mask) >> 16) & 0xff);
 524         }
 525         mutex_unlock(&data->update_lock);
 526
 527         return count;
 528 }
 529
 530 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
 531                 show_beep_mask, store_beep_mask);
 532
 533 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
 534                 char *buf)
 535 {
 536         struct w83781d_data *data = w83781d_update_device(dev);
 537         int bitnr = to_sensor_dev_attr(attr)->index;
 538         return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
 539 }
 540
 541 static ssize_t
 542 store_beep(struct device *dev, struct device_attribute *attr,
 543                 const char *buf, size_t count)
 544 {
 545         struct w83781d_data *data = dev_get_drvdata(dev);
 546         int bitnr = to_sensor_dev_attr(attr)->index;
 547         u8 reg;
 548         unsigned long bit;
 549         int err;
 550
 551         err = kstrtoul(buf, 10, &bit);
 552         if (err)
 553                 return err;
 554
 555         if (bit & ~1)
 556                 return -EINVAL;
 557
 558         mutex_lock(&data->update_lock);
 559         if (bit)
 560                 data->beep_mask |= (1 << bitnr);
 561         else
 562                 data->beep_mask &= ~(1 << bitnr);
 563
 564         if (bitnr < 8) {
 565                 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS1);
 566                 if (bit)
 567                         reg |= (1 << bitnr);
 568                 else
 569                         reg &= ~(1 << bitnr);
 570                 w83781d_write_value(data, W83781D_REG_BEEP_INTS1, reg);
 571         } else if (bitnr < 16) {
 572                 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS2);
 573                 if (bit)
 574                         reg |= (1 << (bitnr - 8));
 575                 else
 576                         reg &= ~(1 << (bitnr - 8));
 577                 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, reg);
 578         } else {
 579                 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS3);
 580                 if (bit)
 581                         reg |= (1 << (bitnr - 16));
 582                 else
 583                         reg &= ~(1 << (bitnr - 16));
 584                 w83781d_write_value(data, W83781D_REG_BEEP_INTS3, reg);
 585         }
 586         mutex_unlock(&data->update_lock);
 587
 588         return count;
 589 }
 590
 591 /* The W83781D has a single beep bit for temp2 and temp3 */
 592 static ssize_t show_temp3_beep(struct device *dev,
 593                 struct device_attribute *attr, char *buf)
 594 {
 595         struct w83781d_data *data = w83781d_update_device(dev);
 596         int bitnr = (data->type == w83781d) ? 5 : 13;
 597         return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
 598 }
 599
 600 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
 601                         show_beep, store_beep, 0);
 602 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR,
 603                         show_beep, store_beep, 1);
 604 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR,
 605                         show_beep, store_beep, 2);
 606 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR,
 607                         show_beep, store_beep, 3);
 608 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR,
 609                         show_beep, store_beep, 8);
 610 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO | S_IWUSR,
 611                         show_beep, store_beep, 9);
 612 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO | S_IWUSR,
 613                         show_beep, store_beep, 10);
 614 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO | S_IWUSR,
 615                         show_beep, store_beep, 16);
 616 static SENSOR_DEVICE_ATTR(in8_beep, S_IRUGO | S_IWUSR,
 617                         show_beep, store_beep, 17);
 618 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR,
 619                         show_beep, store_beep, 6);
 620 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR,
 621                         show_beep, store_beep, 7);
 622 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO | S_IWUSR,
 623                         show_beep, store_beep, 11);
 624 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
 625                         show_beep, store_beep, 4);
 626 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR,
 627                         show_beep, store_beep, 5);
 628 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO,
 629                         show_temp3_beep, store_beep, 13);
 630 static SENSOR_DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
 631                         show_beep, store_beep, 15);
 632
 633 static ssize_t
 634 show_fan_div(struct device *dev, struct device_attribute *da, char *buf)
 635 {
 636         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 637         struct w83781d_data *data = w83781d_update_device(dev);
 638         return sprintf(buf, "%ld\n",
 639                        (long) DIV_FROM_REG(data->fan_div[attr->index]));
 640 }
 641
 642 /*
 643  * Note: we save and restore the fan minimum here, because its value is
 644  * determined in part by the fan divisor.  This follows the principle of
 645  * least surprise; the user doesn't expect the fan minimum to change just
 646  * because the divisor changed.
 647  */
 648 static ssize_t
 649 store_fan_div(struct device *dev, struct device_attribute *da,
 650                 const char *buf, size_t count)
 651 {
 652         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 653         struct w83781d_data *data = dev_get_drvdata(dev);
 654         unsigned long min;
 655         int nr = attr->index;
 656         u8 reg;
 657         unsigned long val;
 658         int err;
 659
 660         err = kstrtoul(buf, 10, &val);
 661         if (err)
 662                 return err;
 663
 664         mutex_lock(&data->update_lock);
 665
 666         /* Save fan_min */
 667         min = FAN_FROM_REG(data->fan_min[nr],
 668                            DIV_FROM_REG(data->fan_div[nr]));
 669
 670         data->fan_div[nr] = DIV_TO_REG(val, data->type);
 671
 672         reg = (w83781d_read_value(data, nr == 2 ?
 673                                   W83781D_REG_PIN : W83781D_REG_VID_FANDIV)
 674                 & (nr == 0 ? 0xcf : 0x3f))
 675               | ((data->fan_div[nr] & 0x03) << (nr == 0 ? 4 : 6));
 676         w83781d_write_value(data, nr == 2 ?
 677                             W83781D_REG_PIN : W83781D_REG_VID_FANDIV, reg);
 678
 679         /* w83781d and as99127f don't have extended divisor bits */
 680         if (data->type != w83781d && data->type != as99127f) {
 681                 reg = (w83781d_read_value(data, W83781D_REG_VBAT)
 682                        & ~(1 << (5 + nr)))
 683                     | ((data->fan_div[nr] & 0x04) << (3 + nr));
 684                 w83781d_write_value(data, W83781D_REG_VBAT, reg);
 685         }
 686
 687         /* Restore fan_min */
 688         data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 689         w83781d_write_value(data, W83781D_REG_FAN_MIN(nr), data->fan_min[nr]);
 690
 691         mutex_unlock(&data->update_lock);
 692         return count;
 693 }
 694
 695 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
 696                 show_fan_div, store_fan_div, 0);
 697 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
 698                 show_fan_div, store_fan_div, 1);
 699 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR,
 700                 show_fan_div, store_fan_div, 2);
 701
 702 static ssize_t
 703 show_pwm(struct device *dev, struct device_attribute *da, char *buf)
 704 {
 705         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 706         struct w83781d_data *data = w83781d_update_device(dev);
 707         return sprintf(buf, "%d\n", (int)data->pwm[attr->index]);
 708 }
 709
 710 static ssize_t
 711 show_pwm2_enable(struct device *dev, struct device_attribute *da, char *buf)
 712 {
 713         struct w83781d_data *data = w83781d_update_device(dev);
 714         return sprintf(buf, "%d\n", (int)data->pwm2_enable);
 715 }
 716
 717 static ssize_t
 718 store_pwm(struct device *dev, struct device_attribute *da, const char *buf,
 719                 size_t count)
 720 {
 721         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 722         struct w83781d_data *data = dev_get_drvdata(dev);
 723         int nr = attr->index;
 724         unsigned long val;
 725         int err;
 726
 727         err = kstrtoul(buf, 10, &val);
 728         if (err)
 729                 return err;
 730
 731         mutex_lock(&data->update_lock);
 732         data->pwm[nr] = clamp_val(val, 0, 255);
 733         w83781d_write_value(data, W83781D_REG_PWM[nr], data->pwm[nr]);
 734         mutex_unlock(&data->update_lock);
 735         return count;
 736 }
 737
 738 static ssize_t
 739 store_pwm2_enable(struct device *dev, struct device_attribute *da,
 740                 const char *buf, size_t count)
 741 {
 742         struct w83781d_data *data = dev_get_drvdata(dev);
 743         unsigned long val;
 744         u32 reg;
 745         int err;
 746
 747         err = kstrtoul(buf, 10, &val);
 748         if (err)
 749                 return err;
 750
 751         mutex_lock(&data->update_lock);
 752
 753         switch (val) {
 754         case 0:
 755         case 1:
 756                 reg = w83781d_read_value(data, W83781D_REG_PWMCLK12);
 757                 w83781d_write_value(data, W83781D_REG_PWMCLK12,
 758                                     (reg & 0xf7) | (val << 3));
 759
 760                 reg = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
 761                 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG,
 762                                     (reg & 0xef) | (!val << 4));
 763
 764                 data->pwm2_enable = val;
 765                 break;
 766
 767         default:
 768                 mutex_unlock(&data->update_lock);
 769                 return -EINVAL;
 770         }
 771
 772         mutex_unlock(&data->update_lock);
 773         return count;
 774 }
 775
 776 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0);
 777 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 1);
 778 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 2);
 779 static SENSOR_DEVICE_ATTR(pwm4, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 3);
 780 /* only PWM2 can be enabled/disabled */
 781 static DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
 782                 show_pwm2_enable, store_pwm2_enable);
 783
 784 static ssize_t
 785 show_sensor(struct device *dev, struct device_attribute *da, char *buf)
 786 {
 787         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 788         struct w83781d_data *data = w83781d_update_device(dev);
 789         return sprintf(buf, "%d\n", (int)data->sens[attr->index]);
 790 }
 791
 792 static ssize_t
 793 store_sensor(struct device *dev, struct device_attribute *da,
 794                 const char *buf, size_t count)
 795 {
 796         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 797         struct w83781d_data *data = dev_get_drvdata(dev);
 798         int nr = attr->index;
 799         unsigned long val;
 800         u32 tmp;
 801         int err;
 802
 803         err = kstrtoul(buf, 10, &val);
 804         if (err)
 805                 return err;
 806
 807         mutex_lock(&data->update_lock);
 808
 809         switch (val) {
 810         case 1:         /* PII/Celeron diode */
 811                 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
 812                 w83781d_write_value(data, W83781D_REG_SCFG1,
 813                                     tmp | BIT_SCFG1[nr]);
 814                 tmp = w83781d_read_value(data, W83781D_REG_SCFG2);
 815                 w83781d_write_value(data, W83781D_REG_SCFG2,
 816                                     tmp | BIT_SCFG2[nr]);
 817                 data->sens[nr] = val;
 818                 break;
 819         case 2:         /* 3904 */
 820                 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
 821                 w83781d_write_value(data, W83781D_REG_SCFG1,
 822                                     tmp | BIT_SCFG1[nr]);
 823                 tmp = w83781d_read_value(data, W83781D_REG_SCFG2);
 824                 w83781d_write_value(data, W83781D_REG_SCFG2,
 825                                     tmp & ~BIT_SCFG2[nr]);
 826                 data->sens[nr] = val;
 827                 break;
 828         case W83781D_DEFAULT_BETA:
 829                 dev_warn(dev,
 830                          "Sensor type %d is deprecated, please use 4 instead\n",
 831                          W83781D_DEFAULT_BETA);
 832                 /* fall through */
 833         case 4:         /* thermistor */
 834                 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
 835                 w83781d_write_value(data, W83781D_REG_SCFG1,
 836                                     tmp & ~BIT_SCFG1[nr]);
 837                 data->sens[nr] = val;
 838                 break;
 839         default:
 840                 dev_err(dev, "Invalid sensor type %ld; must be 1, 2, or 4\n",
 841                        (long) val);
 842                 break;
 843         }
 844
 845         mutex_unlock(&data->update_lock);
 846         return count;
 847 }
 848
 849 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR,
 850         show_sensor, store_sensor, 0);
 851 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR,
 852         show_sensor, store_sensor, 1);
 853 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR,
 854         show_sensor, store_sensor, 2);
 855
 856 /*
 857  * Assumes that adapter is of I2C, not ISA variety.
 858  * OTHERWISE DON'T CALL THIS
 859  */
 860 static int
 861 w83781d_detect_subclients(struct i2c_client *new_client)
 862 {
 863         int i, val1 = 0, id;
 864         int err;
 865         int address = new_client->addr;
 866         unsigned short sc_addr[2];
 867         struct i2c_adapter *adapter = new_client->adapter;
 868         struct w83781d_data *data = i2c_get_clientdata(new_client);
 869         enum chips kind = data->type;
 870         int num_sc = 1;
 871
 872         id = i2c_adapter_id(adapter);
 873
 874         if (force_subclients[0] == id && force_subclients[1] == address) {
 875                 for (i = 2; i <= 3; i++) {
 876                         if (force_subclients[i] < 0x48 ||
 877                             force_subclients[i] > 0x4f) {
 878                                 dev_err(&new_client->dev,
 879                                         "Invalid subclient address %d; must be 0x48-0x4f\n",
 880                                         force_subclients[i]);
 881                                 err = -EINVAL;
 882                                 goto ERROR_SC_1;
 883                         }
 884                 }
 885                 w83781d_write_value(data, W83781D_REG_I2C_SUBADDR,
 886                                 (force_subclients[2] & 0x07) |
 887                                 ((force_subclients[3] & 0x07) << 4));
 888                 sc_addr[0] = force_subclients[2];
 889         } else {
 890                 val1 = w83781d_read_value(data, W83781D_REG_I2C_SUBADDR);
 891                 sc_addr[0] = 0x48 + (val1 & 0x07);
 892         }
 893
 894         if (kind != w83783s) {
 895                 num_sc = 2;
 896                 if (force_subclients[0] == id &&
 897                     force_subclients[1] == address) {
 898                         sc_addr[1] = force_subclients[3];
 899                 } else {
 900                         sc_addr[1] = 0x48 + ((val1 >> 4) & 0x07);
 901                 }
 902                 if (sc_addr[0] == sc_addr[1]) {
 903                         dev_err(&new_client->dev,
 904                                "Duplicate addresses 0x%x for subclients.\n",
 905                                sc_addr[0]);
 906                         err = -EBUSY;
 907                         goto ERROR_SC_2;
 908                 }
 909         }
 910
 911         for (i = 0; i < num_sc; i++) {
 912                 data->lm75[i] = i2c_new_dummy(adapter, sc_addr[i]);
 913                 if (!data->lm75[i]) {
 914                         dev_err(&new_client->dev,
 915                                 "Subclient %d registration at address 0x%x failed.\n",
 916                                 i, sc_addr[i]);
 917                         err = -ENOMEM;
 918                         if (i == 1)
 919                                 goto ERROR_SC_3;
 920                         goto ERROR_SC_2;
 921                 }
 922         }
 923
 924         return 0;
 925
 926 /* Undo inits in case of errors */
 927 ERROR_SC_3:
 928         i2c_unregister_device(data->lm75[0]);
 929 ERROR_SC_2:
 930 ERROR_SC_1:
 931         return err;
 932 }
 933
 934 #define IN_UNIT_ATTRS(X)                                        \
 935         &sensor_dev_attr_in##X##_input.dev_attr.attr,           \
 936         &sensor_dev_attr_in##X##_min.dev_attr.attr,             \
 937         &sensor_dev_attr_in##X##_max.dev_attr.attr,             \
 938         &sensor_dev_attr_in##X##_alarm.dev_attr.attr,           \
 939         &sensor_dev_attr_in##X##_beep.dev_attr.attr
 940
 941 #define FAN_UNIT_ATTRS(X)                                       \
 942         &sensor_dev_attr_fan##X##_input.dev_attr.attr,          \
 943         &sensor_dev_attr_fan##X##_min.dev_attr.attr,            \
 944         &sensor_dev_attr_fan##X##_div.dev_attr.attr,            \
 945         &sensor_dev_attr_fan##X##_alarm.dev_attr.attr,          \
 946         &sensor_dev_attr_fan##X##_beep.dev_attr.attr
 947
 948 #define TEMP_UNIT_ATTRS(X)                                      \
 949         &sensor_dev_attr_temp##X##_input.dev_attr.attr,         \
 950         &sensor_dev_attr_temp##X##_max.dev_attr.attr,           \
 951         &sensor_dev_attr_temp##X##_max_hyst.dev_attr.attr,      \
 952         &sensor_dev_attr_temp##X##_alarm.dev_attr.attr,         \
 953         &sensor_dev_attr_temp##X##_beep.dev_attr.attr
 954
 955 static struct attribute *w83781d_attributes[] = {
 956         IN_UNIT_ATTRS(0),
 957         IN_UNIT_ATTRS(2),
 958         IN_UNIT_ATTRS(3),
 959         IN_UNIT_ATTRS(4),
 960         IN_UNIT_ATTRS(5),
 961         IN_UNIT_ATTRS(6),
 962         FAN_UNIT_ATTRS(1),
 963         FAN_UNIT_ATTRS(2),
 964         FAN_UNIT_ATTRS(3),
 965         TEMP_UNIT_ATTRS(1),
 966         TEMP_UNIT_ATTRS(2),
 967         &dev_attr_cpu0_vid.attr,
 968         &dev_attr_vrm.attr,
 969         &dev_attr_alarms.attr,
 970         &dev_attr_beep_mask.attr,
 971         &sensor_dev_attr_beep_enable.dev_attr.attr,
 972         NULL
 973 };
 974 static const struct attribute_group w83781d_group = {
 975         .attrs = w83781d_attributes,
 976 };
 977
 978 static struct attribute *w83781d_attributes_in1[] = {
 979         IN_UNIT_ATTRS(1),
 980         NULL
 981 };
 982 static const struct attribute_group w83781d_group_in1 = {
 983         .attrs = w83781d_attributes_in1,
 984 };
 985
 986 static struct attribute *w83781d_attributes_in78[] = {
 987         IN_UNIT_ATTRS(7),
 988         IN_UNIT_ATTRS(8),
 989         NULL
 990 };
 991 static const struct attribute_group w83781d_group_in78 = {
 992         .attrs = w83781d_attributes_in78,
 993 };
 994
 995 static struct attribute *w83781d_attributes_temp3[] = {
 996         TEMP_UNIT_ATTRS(3),
 997         NULL
 998 };
 999 static const struct attribute_group w83781d_group_temp3 = {
1000         .attrs = w83781d_attributes_temp3,
1001 };
1002
1003 static struct attribute *w83781d_attributes_pwm12[] = {
1004         &sensor_dev_attr_pwm1.dev_attr.attr,
1005         &sensor_dev_attr_pwm2.dev_attr.attr,
1006         &dev_attr_pwm2_enable.attr,
1007         NULL
1008 };
1009 static const struct attribute_group w83781d_group_pwm12 = {
1010         .attrs = w83781d_attributes_pwm12,
1011 };
1012
1013 static struct attribute *w83781d_attributes_pwm34[] = {
1014         &sensor_dev_attr_pwm3.dev_attr.attr,
1015         &sensor_dev_attr_pwm4.dev_attr.attr,
1016         NULL
1017 };
1018 static const struct attribute_group w83781d_group_pwm34 = {
1019         .attrs = w83781d_attributes_pwm34,
1020 };
1021
1022 static struct attribute *w83781d_attributes_other[] = {
1023         &sensor_dev_attr_temp1_type.dev_attr.attr,
1024         &sensor_dev_attr_temp2_type.dev_attr.attr,
1025         &sensor_dev_attr_temp3_type.dev_attr.attr,
1026         NULL
1027 };
1028 static const struct attribute_group w83781d_group_other = {
1029         .attrs = w83781d_attributes_other,
1030 };
1031
1032 /* No clean up is done on error, it's up to the caller */
1033 static int
1034 w83781d_create_files(struct device *dev, int kind, int is_isa)
1035 {
1036         int err;
1037
1038         err = sysfs_create_group(&dev->kobj, &w83781d_group);
1039         if (err)
1040                 return err;
1041
1042         if (kind != w83783s) {
1043                 err = sysfs_create_group(&dev->kobj, &w83781d_group_in1);
1044                 if (err)
1045                         return err;
1046         }
1047         if (kind != as99127f && kind != w83781d && kind != w83783s) {
1048                 err = sysfs_create_group(&dev->kobj, &w83781d_group_in78);
1049                 if (err)
1050                         return err;
1051         }
1052         if (kind != w83783s) {
1053                 err = sysfs_create_group(&dev->kobj, &w83781d_group_temp3);
1054                 if (err)
1055                         return err;
1056
1057                 if (kind != w83781d) {
1058                         err = sysfs_chmod_file(&dev->kobj,
1059                                 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1060                                 S_IRUGO | S_IWUSR);
1061                         if (err)
1062                                 return err;
1063                 }
1064         }
1065
1066         if (kind != w83781d && kind != as99127f) {
1067                 err = sysfs_create_group(&dev->kobj, &w83781d_group_pwm12);
1068                 if (err)
1069                         return err;
1070         }
1071         if (kind == w83782d && !is_isa) {
1072                 err = sysfs_create_group(&dev->kobj, &w83781d_group_pwm34);
1073                 if (err)
1074                         return err;
1075         }
1076
1077         if (kind != as99127f && kind != w83781d) {
1078                 err = device_create_file(dev,
1079                                          &sensor_dev_attr_temp1_type.dev_attr);
1080                 if (err)
1081                         return err;
1082                 err = device_create_file(dev,
1083                                          &sensor_dev_attr_temp2_type.dev_attr);
1084                 if (err)
1085                         return err;
1086                 if (kind != w83783s) {
1087                         err = device_create_file(dev,
1088                                         &sensor_dev_attr_temp3_type.dev_attr);
1089                         if (err)
1090                                 return err;
1091                 }
1092         }
1093
1094         return 0;
1095 }
1096
1097 /* Return 0 if detection is successful, -ENODEV otherwise */
1098 static int
1099 w83781d_detect(struct i2c_client *client, struct i2c_board_info *info)
1100 {
1101         int val1, val2;
1102         struct w83781d_data *isa = w83781d_data_if_isa();
1103         struct i2c_adapter *adapter = client->adapter;
1104         int address = client->addr;
1105         const char *client_name;
1106         enum vendor { winbond, asus } vendid;
1107
1108         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1109                 return -ENODEV;
1110
1111         /*
1112          * We block updates of the ISA device to minimize the risk of
1113          * concurrent access to the same W83781D chip through different
1114          * interfaces.
1115          */
1116         if (isa)
1117                 mutex_lock(&isa->update_lock);
1118
1119         if (i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG) & 0x80) {
1120                 dev_dbg(&adapter->dev,
1121                         "Detection of w83781d chip failed at step 3\n");
1122                 goto err_nodev;
1123         }
1124
1125         val1 = i2c_smbus_read_byte_data(client, W83781D_REG_BANK);
1126         val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
1127         /* Check for Winbond or Asus ID if in bank 0 */
1128         if (!(val1 & 0x07) &&
1129             ((!(val1 & 0x80) && val2 != 0xa3 && val2 != 0xc3) ||
1130              ((val1 & 0x80) && val2 != 0x5c && val2 != 0x12))) {
1131                 dev_dbg(&adapter->dev,
1132                         "Detection of w83781d chip failed at step 4\n");
1133                 goto err_nodev;
1134         }
1135         /*
1136          * If Winbond SMBus, check address at 0x48.
1137          * Asus doesn't support, except for as99127f rev.2
1138          */
1139         if ((!(val1 & 0x80) && val2 == 0xa3) ||
1140             ((val1 & 0x80) && val2 == 0x5c)) {
1141                 if (i2c_smbus_read_byte_data(client, W83781D_REG_I2C_ADDR)
1142                     != address) {
1143                         dev_dbg(&adapter->dev,
1144                                 "Detection of w83781d chip failed at step 5\n");
1145                         goto err_nodev;
1146                 }
1147         }
1148
1149         /* Put it now into bank 0 and Vendor ID High Byte */
1150         i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1151                 (i2c_smbus_read_byte_data(client, W83781D_REG_BANK)
1152                  & 0x78) | 0x80);
1153
1154         /* Get the vendor ID */
1155         val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
1156         if (val2 == 0x5c)
1157                 vendid = winbond;
1158         else if (val2 == 0x12)
1159                 vendid = asus;
1160         else {
1161                 dev_dbg(&adapter->dev,
1162                         "w83781d chip vendor is neither Winbond nor Asus\n");
1163                 goto err_nodev;
1164         }
1165
1166         /* Determine the chip type. */
1167         val1 = i2c_smbus_read_byte_data(client, W83781D_REG_WCHIPID);
1168         if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond)
1169                 client_name = "w83781d";
1170         else if (val1 == 0x30 && vendid == winbond)
1171                 client_name = "w83782d";
1172         else if (val1 == 0x40 && vendid == winbond && address == 0x2d)
1173                 client_name = "w83783s";
1174         else if (val1 == 0x31)
1175                 client_name = "as99127f";
1176         else
1177                 goto err_nodev;
1178
1179         if (val1 <= 0x30 && w83781d_alias_detect(client, val1)) {
1180                 dev_dbg(&adapter->dev,
1181                         "Device at 0x%02x appears to be the same as ISA device\n",
1182                         address);
1183                 goto err_nodev;
1184         }
1185
1186         if (isa)
1187                 mutex_unlock(&isa->update_lock);
1188
1189         strlcpy(info->type, client_name, I2C_NAME_SIZE);
1190
1191         return 0;
1192
1193  err_nodev:
1194         if (isa)
1195                 mutex_unlock(&isa->update_lock);
1196         return -ENODEV;
1197 }
1198
1199 static void w83781d_remove_files(struct device *dev)
1200 {
1201         sysfs_remove_group(&dev->kobj, &w83781d_group);
1202         sysfs_remove_group(&dev->kobj, &w83781d_group_in1);
1203         sysfs_remove_group(&dev->kobj, &w83781d_group_in78);
1204         sysfs_remove_group(&dev->kobj, &w83781d_group_temp3);
1205         sysfs_remove_group(&dev->kobj, &w83781d_group_pwm12);
1206         sysfs_remove_group(&dev->kobj, &w83781d_group_pwm34);
1207         sysfs_remove_group(&dev->kobj, &w83781d_group_other);
1208 }
1209
1210 static int
1211 w83781d_probe(struct i2c_client *client, const struct i2c_device_id *id)
1212 {
1213         struct device *dev = &client->dev;
1214         struct w83781d_data *data;
1215         int err;
1216
1217         data = devm_kzalloc(dev, sizeof(struct w83781d_data), GFP_KERNEL);
1218         if (!data)
1219                 return -ENOMEM;
1220
1221         i2c_set_clientdata(client, data);
1222         mutex_init(&data->lock);
1223         mutex_init(&data->update_lock);
1224
1225         data->type = id->driver_data;
1226         data->client = client;
1227
1228         /* attach secondary i2c lm75-like clients */
1229         err = w83781d_detect_subclients(client);
1230         if (err)
1231                 return err;
1232
1233         /* Initialize the chip */
1234         w83781d_init_device(dev);
1235
1236         /* Register sysfs hooks */
1237         err = w83781d_create_files(dev, data->type, 0);
1238         if (err)
1239                 goto exit_remove_files;
1240
1241         data->hwmon_dev = hwmon_device_register(dev);
1242         if (IS_ERR(data->hwmon_dev)) {
1243                 err = PTR_ERR(data->hwmon_dev);
1244                 goto exit_remove_files;
1245         }
1246
1247         return 0;
1248
1249  exit_remove_files:
1250         w83781d_remove_files(dev);
1251         if (data->lm75[0])
1252                 i2c_unregister_device(data->lm75[0]);
1253         if (data->lm75[1])
1254                 i2c_unregister_device(data->lm75[1]);
1255         return err;
1256 }
1257
1258 static int
1259 w83781d_remove(struct i2c_client *client)
1260 {
1261         struct w83781d_data *data = i2c_get_clientdata(client);
1262         struct device *dev = &client->dev;
1263
1264         hwmon_device_unregister(data->hwmon_dev);
1265         w83781d_remove_files(dev);
1266
1267         if (data->lm75[0])
1268                 i2c_unregister_device(data->lm75[0]);
1269         if (data->lm75[1])
1270                 i2c_unregister_device(data->lm75[1]);
1271
1272         return 0;
1273 }
1274
1275 static int
1276 w83781d_read_value_i2c(struct w83781d_data *data, u16 reg)
1277 {
1278         struct i2c_client *client = data->client;
1279         int res, bank;
1280         struct i2c_client *cl;
1281
1282         bank = (reg >> 8) & 0x0f;
1283         if (bank > 2)
1284                 /* switch banks */
1285                 i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1286                                           bank);
1287         if (bank == 0 || bank > 2) {
1288                 res = i2c_smbus_read_byte_data(client, reg & 0xff);
1289         } else {
1290                 /* switch to subclient */
1291                 cl = data->lm75[bank - 1];
1292                 /* convert from ISA to LM75 I2C addresses */
1293                 switch (reg & 0xff) {
1294                 case 0x50:      /* TEMP */
1295                         res = i2c_smbus_read_word_swapped(cl, 0);
1296                         break;
1297                 case 0x52:      /* CONFIG */
1298                         res = i2c_smbus_read_byte_data(cl, 1);
1299                         break;
1300                 case 0x53:      /* HYST */
1301                         res = i2c_smbus_read_word_swapped(cl, 2);
1302                         break;
1303                 case 0x55:      /* OVER */
1304                 default:
1305                         res = i2c_smbus_read_word_swapped(cl, 3);
1306                         break;
1307                 }
1308         }
1309         if (bank > 2)
1310                 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1311
1312         return res;
1313 }
1314
1315 static int
1316 w83781d_write_value_i2c(struct w83781d_data *data, u16 reg, u16 value)
1317 {
1318         struct i2c_client *client = data->client;
1319         int bank;
1320         struct i2c_client *cl;
1321
1322         bank = (reg >> 8) & 0x0f;
1323         if (bank > 2)
1324                 /* switch banks */
1325                 i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1326                                           bank);
1327         if (bank == 0 || bank > 2) {
1328                 i2c_smbus_write_byte_data(client, reg & 0xff,
1329                                           value & 0xff);
1330         } else {
1331                 /* switch to subclient */
1332                 cl = data->lm75[bank - 1];
1333                 /* convert from ISA to LM75 I2C addresses */
1334                 switch (reg & 0xff) {
1335                 case 0x52:      /* CONFIG */
1336                         i2c_smbus_write_byte_data(cl, 1, value & 0xff);
1337                         break;
1338                 case 0x53:      /* HYST */
1339                         i2c_smbus_write_word_swapped(cl, 2, value);
1340                         break;
1341                 case 0x55:      /* OVER */
1342                         i2c_smbus_write_word_swapped(cl, 3, value);
1343                         break;
1344                 }
1345         }
1346         if (bank > 2)
1347                 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1348
1349         return 0;
1350 }
1351
1352 static void
1353 w83781d_init_device(struct device *dev)
1354 {
1355         struct w83781d_data *data = dev_get_drvdata(dev);
1356         int i, p;
1357         int type = data->type;
1358         u8 tmp;
1359
1360         if (reset && type != as99127f) { /*
1361                                           * this resets registers we don't have
1362                                           * documentation for on the as99127f
1363                                           */
1364                 /*
1365                  * Resetting the chip has been the default for a long time,
1366                  * but it causes the BIOS initializations (fan clock dividers,
1367                  * thermal sensor types...) to be lost, so it is now optional.
1368                  * It might even go away if nobody reports it as being useful,
1369                  * as I see very little reason why this would be needed at
1370                  * all.
1371                  */
1372                 dev_info(dev,
1373                          "If reset=1 solved a problem you were having, please report!\n");
1374
1375                 /* save these registers */
1376                 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
1377                 p = w83781d_read_value(data, W83781D_REG_PWMCLK12);
1378                 /*
1379                  * Reset all except Watchdog values and last conversion values
1380                  * This sets fan-divs to 2, among others
1381                  */
1382                 w83781d_write_value(data, W83781D_REG_CONFIG, 0x80);
1383                 /*
1384                  * Restore the registers and disable power-on abnormal beep.
1385                  * This saves FAN 1/2/3 input/output values set by BIOS.
1386                  */
1387                 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
1388                 w83781d_write_value(data, W83781D_REG_PWMCLK12, p);
1389                 /*
1390                  * Disable master beep-enable (reset turns it on).
1391                  * Individual beep_mask should be reset to off but for some
1392                  * reason disabling this bit helps some people not get beeped
1393                  */
1394                 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, 0);
1395         }
1396
1397         /*
1398          * Disable power-on abnormal beep, as advised by the datasheet.
1399          * Already done if reset=1.
1400          */
1401         if (init && !reset && type != as99127f) {
1402                 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
1403                 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
1404         }
1405
1406         data->vrm = vid_which_vrm();
1407
1408         if ((type != w83781d) && (type != as99127f)) {
1409                 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
1410                 for (i = 1; i <= 3; i++) {
1411                         if (!(tmp & BIT_SCFG1[i - 1])) {
1412                                 data->sens[i - 1] = 4;
1413                         } else {
1414                                 if (w83781d_read_value
1415                                     (data,
1416                                      W83781D_REG_SCFG2) & BIT_SCFG2[i - 1])
1417                                         data->sens[i - 1] = 1;
1418                                 else
1419                                         data->sens[i - 1] = 2;
1420                         }
1421                         if (type == w83783s && i == 2)
1422                                 break;
1423                 }
1424         }
1425
1426         if (init && type != as99127f) {
1427                 /* Enable temp2 */
1428                 tmp = w83781d_read_value(data, W83781D_REG_TEMP2_CONFIG);
1429                 if (tmp & 0x01) {
1430                         dev_warn(dev,
1431                                  "Enabling temp2, readings might not make sense\n");
1432                         w83781d_write_value(data, W83781D_REG_TEMP2_CONFIG,
1433                                 tmp & 0xfe);
1434                 }
1435
1436                 /* Enable temp3 */
1437                 if (type != w83783s) {
1438                         tmp = w83781d_read_value(data,
1439                                 W83781D_REG_TEMP3_CONFIG);
1440                         if (tmp & 0x01) {
1441                                 dev_warn(dev,
1442                                          "Enabling temp3, readings might not make sense\n");
1443                                 w83781d_write_value(data,
1444                                         W83781D_REG_TEMP3_CONFIG, tmp & 0xfe);
1445                         }
1446                 }
1447         }
1448
1449         /* Start monitoring */
1450         w83781d_write_value(data, W83781D_REG_CONFIG,
1451                             (w83781d_read_value(data,
1452                                                 W83781D_REG_CONFIG) & 0xf7)
1453                             | 0x01);
1454
1455         /* A few vars need to be filled upon startup */
1456         for (i = 0; i < 3; i++) {
1457                 data->fan_min[i] = w83781d_read_value(data,
1458                                         W83781D_REG_FAN_MIN(i));
1459         }
1460
1461         mutex_init(&data->update_lock);
1462 }
1463
1464 static struct w83781d_data *w83781d_update_device(struct device *dev)
1465 {
1466         struct w83781d_data *data = dev_get_drvdata(dev);
1467         struct i2c_client *client = data->client;
1468         int i;
1469
1470         mutex_lock(&data->update_lock);
1471
1472         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1473             || !data->valid) {
1474                 dev_dbg(dev, "Starting device update\n");
1475
1476                 for (i = 0; i <= 8; i++) {
1477                         if (data->type == w83783s && i == 1)
1478                                 continue;       /* 783S has no in1 */
1479                         data->in[i] =
1480                             w83781d_read_value(data, W83781D_REG_IN(i));
1481                         data->in_min[i] =
1482                             w83781d_read_value(data, W83781D_REG_IN_MIN(i));
1483                         data->in_max[i] =
1484                             w83781d_read_value(data, W83781D_REG_IN_MAX(i));
1485                         if ((data->type != w83782d) && (i == 6))
1486                                 break;
1487                 }
1488                 for (i = 0; i < 3; i++) {
1489                         data->fan[i] =
1490                             w83781d_read_value(data, W83781D_REG_FAN(i));
1491                         data->fan_min[i] =
1492                             w83781d_read_value(data, W83781D_REG_FAN_MIN(i));
1493                 }
1494                 if (data->type != w83781d && data->type != as99127f) {
1495                         for (i = 0; i < 4; i++) {
1496                                 data->pwm[i] =
1497                                     w83781d_read_value(data,
1498                                                        W83781D_REG_PWM[i]);
1499                                 /* Only W83782D on SMBus has PWM3 and PWM4 */
1500                                 if ((data->type != w83782d || !client)
1501                                     && i == 1)
1502                                         break;
1503                         }
1504                         /* Only PWM2 can be disabled */
1505                         data->pwm2_enable = (w83781d_read_value(data,
1506                                              W83781D_REG_PWMCLK12) & 0x08) >> 3;
1507                 }
1508
1509                 data->temp = w83781d_read_value(data, W83781D_REG_TEMP(1));
1510                 data->temp_max =
1511                     w83781d_read_value(data, W83781D_REG_TEMP_OVER(1));
1512                 data->temp_max_hyst =
1513                     w83781d_read_value(data, W83781D_REG_TEMP_HYST(1));
1514                 data->temp_add[0] =
1515                     w83781d_read_value(data, W83781D_REG_TEMP(2));
1516                 data->temp_max_add[0] =
1517                     w83781d_read_value(data, W83781D_REG_TEMP_OVER(2));
1518                 data->temp_max_hyst_add[0] =
1519                     w83781d_read_value(data, W83781D_REG_TEMP_HYST(2));
1520                 if (data->type != w83783s) {
1521                         data->temp_add[1] =
1522                             w83781d_read_value(data, W83781D_REG_TEMP(3));
1523                         data->temp_max_add[1] =
1524                             w83781d_read_value(data,
1525                                                W83781D_REG_TEMP_OVER(3));
1526                         data->temp_max_hyst_add[1] =
1527                             w83781d_read_value(data,
1528                                                W83781D_REG_TEMP_HYST(3));
1529                 }
1530                 i = w83781d_read_value(data, W83781D_REG_VID_FANDIV);
1531                 data->vid = i & 0x0f;
1532                 data->vid |= (w83781d_read_value(data,
1533                                         W83781D_REG_CHIPID) & 0x01) << 4;
1534                 data->fan_div[0] = (i >> 4) & 0x03;
1535                 data->fan_div[1] = (i >> 6) & 0x03;
1536                 data->fan_div[2] = (w83781d_read_value(data,
1537                                         W83781D_REG_PIN) >> 6) & 0x03;
1538                 if ((data->type != w83781d) && (data->type != as99127f)) {
1539                         i = w83781d_read_value(data, W83781D_REG_VBAT);
1540                         data->fan_div[0] |= (i >> 3) & 0x04;
1541                         data->fan_div[1] |= (i >> 4) & 0x04;
1542                         data->fan_div[2] |= (i >> 5) & 0x04;
1543                 }
1544                 if (data->type == w83782d) {
1545                         data->alarms = w83781d_read_value(data,
1546                                                 W83782D_REG_ALARM1)
1547                                      | (w83781d_read_value(data,
1548                                                 W83782D_REG_ALARM2) << 8)
1549                                      | (w83781d_read_value(data,
1550                                                 W83782D_REG_ALARM3) << 16);
1551                 } else if (data->type == w83783s) {
1552                         data->alarms = w83781d_read_value(data,
1553                                                 W83782D_REG_ALARM1)
1554                                      | (w83781d_read_value(data,
1555                                                 W83782D_REG_ALARM2) << 8);
1556                 } else {
1557                         /*
1558                          * No real-time status registers, fall back to
1559                          * interrupt status registers
1560                          */
1561                         data->alarms = w83781d_read_value(data,
1562                                                 W83781D_REG_ALARM1)
1563                                      | (w83781d_read_value(data,
1564                                                 W83781D_REG_ALARM2) << 8);
1565                 }
1566                 i = w83781d_read_value(data, W83781D_REG_BEEP_INTS2);
1567                 data->beep_mask = (i << 8) +
1568                     w83781d_read_value(data, W83781D_REG_BEEP_INTS1);
1569                 if ((data->type != w83781d) && (data->type != as99127f)) {
1570                         data->beep_mask |=
1571                             w83781d_read_value(data,
1572                                                W83781D_REG_BEEP_INTS3) << 16;
1573                 }
1574                 data->last_updated = jiffies;
1575                 data->valid = 1;
1576         }
1577
1578         mutex_unlock(&data->update_lock);
1579
1580         return data;
1581 }
1582
1583 static const struct i2c_device_id w83781d_ids[] = {
1584         { "w83781d", w83781d, },
1585         { "w83782d", w83782d, },
1586         { "w83783s", w83783s, },
1587         { "as99127f", as99127f },
1588         { /* LIST END */ }
1589 };
1590 MODULE_DEVICE_TABLE(i2c, w83781d_ids);
1591
1592 static struct i2c_driver w83781d_driver = {
1593         .class          = I2C_CLASS_HWMON,
1594         .driver = {
1595                 .name = "w83781d",
1596         },
1597         .probe          = w83781d_probe,
1598         .remove         = w83781d_remove,
1599         .id_table       = w83781d_ids,
1600         .detect         = w83781d_detect,
1601         .address_list   = normal_i2c,
1602 };
1603
1604 /*
1605  * ISA related code
1606  */
1607 #ifdef CONFIG_ISA
1608
1609 /* ISA device, if found */
1610 static struct platform_device *pdev;
1611
1612 static unsigned short isa_address = 0x290;
1613
1614 /*
1615  * I2C devices get this name attribute automatically, but for ISA devices
1616  * we must create it by ourselves.
1617  */
1618 static ssize_t
1619 show_name(struct device *dev, struct device_attribute *devattr, char *buf)
1620 {
1621         struct w83781d_data *data = dev_get_drvdata(dev);
1622         return sprintf(buf, "%s\n", data->name);
1623 }
1624 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1625
1626 static struct w83781d_data *w83781d_data_if_isa(void)
1627 {
1628         return pdev ? platform_get_drvdata(pdev) : NULL;
1629 }
1630
1631 /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */
1632 static int w83781d_alias_detect(struct i2c_client *client, u8 chipid)
1633 {
1634         struct w83781d_data *isa;
1635         int i;
1636
1637         if (!pdev)      /* No ISA chip */
1638                 return 0;
1639
1640         isa = platform_get_drvdata(pdev);
1641
1642         if (w83781d_read_value(isa, W83781D_REG_I2C_ADDR) != client->addr)
1643                 return 0;       /* Address doesn't match */
1644         if (w83781d_read_value(isa, W83781D_REG_WCHIPID) != chipid)
1645                 return 0;       /* Chip type doesn't match */
1646
1647         /*
1648          * We compare all the limit registers, the config register and the
1649          * interrupt mask registers
1650          */
1651         for (i = 0x2b; i <= 0x3d; i++) {
1652                 if (w83781d_read_value(isa, i) !=
1653                     i2c_smbus_read_byte_data(client, i))
1654                         return 0;
1655         }
1656         if (w83781d_read_value(isa, W83781D_REG_CONFIG) !=
1657             i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG))
1658                 return 0;
1659         for (i = 0x43; i <= 0x46; i++) {
1660                 if (w83781d_read_value(isa, i) !=
1661                     i2c_smbus_read_byte_data(client, i))
1662                         return 0;
1663         }
1664
1665         return 1;
1666 }
1667
1668 static int
1669 w83781d_read_value_isa(struct w83781d_data *data, u16 reg)
1670 {
1671         int word_sized, res;
1672
1673         word_sized = (((reg & 0xff00) == 0x100)
1674                       || ((reg & 0xff00) == 0x200))
1675             && (((reg & 0x00ff) == 0x50)
1676                 || ((reg & 0x00ff) == 0x53)
1677                 || ((reg & 0x00ff) == 0x55));
1678         if (reg & 0xff00) {
1679                 outb_p(W83781D_REG_BANK,
1680                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1681                 outb_p(reg >> 8,
1682                        data->isa_addr + W83781D_DATA_REG_OFFSET);
1683         }
1684         outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
1685         res = inb_p(data->isa_addr + W83781D_DATA_REG_OFFSET);
1686         if (word_sized) {
1687                 outb_p((reg & 0xff) + 1,
1688                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1689                 res =
1690                     (res << 8) + inb_p(data->isa_addr +
1691                                        W83781D_DATA_REG_OFFSET);
1692         }
1693         if (reg & 0xff00) {
1694                 outb_p(W83781D_REG_BANK,
1695                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1696                 outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
1697         }
1698         return res;
1699 }
1700
1701 static void
1702 w83781d_write_value_isa(struct w83781d_data *data, u16 reg, u16 value)
1703 {
1704         int word_sized;
1705
1706         word_sized = (((reg & 0xff00) == 0x100)
1707                       || ((reg & 0xff00) == 0x200))
1708             && (((reg & 0x00ff) == 0x53)
1709                 || ((reg & 0x00ff) == 0x55));
1710         if (reg & 0xff00) {
1711                 outb_p(W83781D_REG_BANK,
1712                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1713                 outb_p(reg >> 8,
1714                        data->isa_addr + W83781D_DATA_REG_OFFSET);
1715         }
1716         outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
1717         if (word_sized) {
1718                 outb_p(value >> 8,
1719                        data->isa_addr + W83781D_DATA_REG_OFFSET);
1720                 outb_p((reg & 0xff) + 1,
1721                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1722         }
1723         outb_p(value & 0xff, data->isa_addr + W83781D_DATA_REG_OFFSET);
1724         if (reg & 0xff00) {
1725                 outb_p(W83781D_REG_BANK,
1726                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1727                 outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
1728         }
1729 }
1730
1731 /*
1732  * The SMBus locks itself, usually, but nothing may access the Winbond between
1733  * bank switches. ISA access must always be locked explicitly!
1734  * We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks,
1735  * would slow down the W83781D access and should not be necessary.
1736  * There are some ugly typecasts here, but the good news is - they should
1737  * nowhere else be necessary!
1738  */
1739 static int
1740 w83781d_read_value(struct w83781d_data *data, u16 reg)
1741 {
1742         struct i2c_client *client = data->client;
1743         int res;
1744
1745         mutex_lock(&data->lock);
1746         if (client)
1747                 res = w83781d_read_value_i2c(data, reg);
1748         else
1749                 res = w83781d_read_value_isa(data, reg);
1750         mutex_unlock(&data->lock);
1751         return res;
1752 }
1753
1754 static int
1755 w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
1756 {
1757         struct i2c_client *client = data->client;
1758
1759         mutex_lock(&data->lock);
1760         if (client)
1761                 w83781d_write_value_i2c(data, reg, value);
1762         else
1763                 w83781d_write_value_isa(data, reg, value);
1764         mutex_unlock(&data->lock);
1765         return 0;
1766 }
1767
1768 static int
1769 w83781d_isa_probe(struct platform_device *pdev)
1770 {
1771         int err, reg;
1772         struct w83781d_data *data;
1773         struct resource *res;
1774
1775         /* Reserve the ISA region */
1776         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1777         if (!devm_request_region(&pdev->dev,
1778                                  res->start + W83781D_ADDR_REG_OFFSET, 2,
1779                                  "w83781d"))
1780                 return -EBUSY;
1781
1782         data = devm_kzalloc(&pdev->dev, sizeof(struct w83781d_data),
1783                             GFP_KERNEL);
1784         if (!data)
1785                 return -ENOMEM;
1786
1787         mutex_init(&data->lock);
1788         data->isa_addr = res->start;
1789         platform_set_drvdata(pdev, data);
1790
1791         reg = w83781d_read_value(data, W83781D_REG_WCHIPID);
1792         switch (reg) {
1793         case 0x30:
1794                 data->type = w83782d;
1795                 data->name = "w83782d";
1796                 break;
1797         default:
1798                 data->type = w83781d;
1799                 data->name = "w83781d";
1800         }
1801
1802         /* Initialize the W83781D chip */
1803         w83781d_init_device(&pdev->dev);
1804
1805         /* Register sysfs hooks */
1806         err = w83781d_create_files(&pdev->dev, data->type, 1);
1807         if (err)
1808                 goto exit_remove_files;
1809
1810         err = device_create_file(&pdev->dev, &dev_attr_name);
1811         if (err)
1812                 goto exit_remove_files;
1813
1814         data->hwmon_dev = hwmon_device_register(&pdev->dev);
1815         if (IS_ERR(data->hwmon_dev)) {
1816                 err = PTR_ERR(data->hwmon_dev);
1817                 goto exit_remove_files;
1818         }
1819
1820         return 0;
1821
1822  exit_remove_files:
1823         w83781d_remove_files(&pdev->dev);
1824         device_remove_file(&pdev->dev, &dev_attr_name);
1825         return err;
1826 }
1827
1828 static int
1829 w83781d_isa_remove(struct platform_device *pdev)
1830 {
1831         struct w83781d_data *data = platform_get_drvdata(pdev);
1832
1833         hwmon_device_unregister(data->hwmon_dev);
1834         w83781d_remove_files(&pdev->dev);
1835         device_remove_file(&pdev->dev, &dev_attr_name);
1836
1837         return 0;
1838 }
1839
1840 static struct platform_driver w83781d_isa_driver = {
1841         .driver = {
1842                 .owner = THIS_MODULE,
1843                 .name = "w83781d",
1844         },
1845         .probe = w83781d_isa_probe,
1846         .remove = w83781d_isa_remove,
1847 };
1848
1849 /* return 1 if a supported chip is found, 0 otherwise */
1850 static int __init
1851 w83781d_isa_found(unsigned short address)
1852 {
1853         int val, save, found = 0;
1854         int port;
1855
1856         /*
1857          * Some boards declare base+0 to base+7 as a PNP device, some base+4
1858          * to base+7 and some base+5 to base+6. So we better request each port
1859          * individually for the probing phase.
1860          */
1861         for (port = address; port < address + W83781D_EXTENT; port++) {
1862                 if (!request_region(port, 1, "w83781d")) {
1863                         pr_debug("Failed to request port 0x%x\n", port);
1864                         goto release;
1865                 }
1866         }
1867
1868 #define REALLY_SLOW_IO
1869         /*
1870          * We need the timeouts for at least some W83781D-like
1871          * chips. But only if we read 'undefined' registers.
1872          */
1873         val = inb_p(address + 1);
1874         if (inb_p(address + 2) != val
1875          || inb_p(address + 3) != val
1876          || inb_p(address + 7) != val) {
1877                 pr_debug("Detection failed at step %d\n", 1);
1878                 goto release;
1879         }
1880 #undef REALLY_SLOW_IO
1881
1882         /*
1883          * We should be able to change the 7 LSB of the address port. The
1884          * MSB (busy flag) should be clear initially, set after the write.
1885          */
1886         save = inb_p(address + W83781D_ADDR_REG_OFFSET);
1887         if (save & 0x80) {
1888                 pr_debug("Detection failed at step %d\n", 2);
1889                 goto release;
1890         }
1891         val = ~save & 0x7f;
1892         outb_p(val, address + W83781D_ADDR_REG_OFFSET);
1893         if (inb_p(address + W83781D_ADDR_REG_OFFSET) != (val | 0x80)) {
1894                 outb_p(save, address + W83781D_ADDR_REG_OFFSET);
1895                 pr_debug("Detection failed at step %d\n", 3);
1896                 goto release;
1897         }
1898
1899         /* We found a device, now see if it could be a W83781D */
1900         outb_p(W83781D_REG_CONFIG, address + W83781D_ADDR_REG_OFFSET);
1901         val = inb_p(address + W83781D_DATA_REG_OFFSET);
1902         if (val & 0x80) {
1903                 pr_debug("Detection failed at step %d\n", 4);
1904                 goto release;
1905         }
1906         outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET);
1907         save = inb_p(address + W83781D_DATA_REG_OFFSET);
1908         outb_p(W83781D_REG_CHIPMAN, address + W83781D_ADDR_REG_OFFSET);
1909         val = inb_p(address + W83781D_DATA_REG_OFFSET);
1910         if ((!(save & 0x80) && (val != 0xa3))
1911          || ((save & 0x80) && (val != 0x5c))) {
1912                 pr_debug("Detection failed at step %d\n", 5);
1913                 goto release;
1914         }
1915         outb_p(W83781D_REG_I2C_ADDR, address + W83781D_ADDR_REG_OFFSET);
1916         val = inb_p(address + W83781D_DATA_REG_OFFSET);
1917         if (val < 0x03 || val > 0x77) { /* Not a valid I2C address */
1918                 pr_debug("Detection failed at step %d\n", 6);
1919                 goto release;
1920         }
1921
1922         /* The busy flag should be clear again */
1923         if (inb_p(address + W83781D_ADDR_REG_OFFSET) & 0x80) {
1924                 pr_debug("Detection failed at step %d\n", 7);
1925                 goto release;
1926         }
1927
1928         /* Determine the chip type */
1929         outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET);
1930         save = inb_p(address + W83781D_DATA_REG_OFFSET);
1931         outb_p(save & 0xf8, address + W83781D_DATA_REG_OFFSET);
1932         outb_p(W83781D_REG_WCHIPID, address + W83781D_ADDR_REG_OFFSET);
1933         val = inb_p(address + W83781D_DATA_REG_OFFSET);
1934         if ((val & 0xfe) == 0x10        /* W83781D */
1935          || val == 0x30)                /* W83782D */
1936                 found = 1;
1937
1938         if (found)
1939                 pr_info("Found a %s chip at %#x\n",
1940                         val == 0x30 ? "W83782D" : "W83781D", (int)address);
1941
1942  release:
1943         for (port--; port >= address; port--)
1944                 release_region(port, 1);
1945         return found;
1946 }
1947
1948 static int __init
1949 w83781d_isa_device_add(unsigned short address)
1950 {
1951         struct resource res = {
1952                 .start  = address,
1953                 .end    = address + W83781D_EXTENT - 1,
1954                 .name   = "w83781d",
1955                 .flags  = IORESOURCE_IO,
1956         };
1957         int err;
1958
1959         pdev = platform_device_alloc("w83781d", address);
1960         if (!pdev) {
1961                 err = -ENOMEM;
1962                 pr_err("Device allocation failed\n");
1963                 goto exit;
1964         }
1965
1966         err = platform_device_add_resources(pdev, &res, 1);
1967         if (err) {
1968                 pr_err("Device resource addition failed (%d)\n", err);
1969                 goto exit_device_put;
1970         }
1971
1972         err = platform_device_add(pdev);
1973         if (err) {
1974                 pr_err("Device addition failed (%d)\n", err);
1975                 goto exit_device_put;
1976         }
1977
1978         return 0;
1979
1980  exit_device_put:
1981         platform_device_put(pdev);
1982  exit:
1983         pdev = NULL;
1984         return err;
1985 }
1986
1987 static int __init
1988 w83781d_isa_register(void)
1989 {
1990         int res;
1991
1992         if (w83781d_isa_found(isa_address)) {
1993                 res = platform_driver_register(&w83781d_isa_driver);
1994                 if (res)
1995                         goto exit;
1996
1997                 /* Sets global pdev as a side effect */
1998                 res = w83781d_isa_device_add(isa_address);
1999                 if (res)
2000                         goto exit_unreg_isa_driver;
2001         }
2002
2003         return 0;
2004
2005 exit_unreg_isa_driver:
2006         platform_driver_unregister(&w83781d_isa_driver);
2007 exit:
2008         return res;
2009 }
2010
2011 static void
2012 w83781d_isa_unregister(void)
2013 {
2014         if (pdev) {
2015                 platform_device_unregister(pdev);
2016                 platform_driver_unregister(&w83781d_isa_driver);
2017         }
2018 }
2019 #else /* !CONFIG_ISA */
2020
2021 static struct w83781d_data *w83781d_data_if_isa(void)
2022 {
2023         return NULL;
2024 }
2025
2026 static int
2027 w83781d_alias_detect(struct i2c_client *client, u8 chipid)
2028 {
2029         return 0;
2030 }
2031
2032 static int
2033 w83781d_read_value(struct w83781d_data *data, u16 reg)
2034 {
2035         int res;
2036
2037         mutex_lock(&data->lock);
2038         res = w83781d_read_value_i2c(data, reg);
2039         mutex_unlock(&data->lock);
2040
2041         return res;
2042 }
2043
2044 static int
2045 w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
2046 {
2047         mutex_lock(&data->lock);
2048         w83781d_write_value_i2c(data, reg, value);
2049         mutex_unlock(&data->lock);
2050
2051         return 0;
2052 }
2053
2054 static int __init
2055 w83781d_isa_register(void)
2056 {
2057         return 0;
2058 }
2059
2060 static void
2061 w83781d_isa_unregister(void)
2062 {
2063 }
2064 #endif /* CONFIG_ISA */
2065
2066 static int __init
2067 sensors_w83781d_init(void)
2068 {
2069         int res;
2070
2071         /*
2072          * We register the ISA device first, so that we can skip the
2073          * registration of an I2C interface to the same device.
2074          */
2075         res = w83781d_isa_register();
2076         if (res)
2077                 goto exit;
2078
2079         res = i2c_add_driver(&w83781d_driver);
2080         if (res)
2081                 goto exit_unreg_isa;
2082
2083         return 0;
2084
2085  exit_unreg_isa:
2086         w83781d_isa_unregister();
2087  exit:
2088         return res;
2089 }
2090
2091 static void __exit
2092 sensors_w83781d_exit(void)
2093 {
2094         w83781d_isa_unregister();
2095         i2c_del_driver(&w83781d_driver);
2096 }
2097
2098 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
2099               "Philip Edelbrock <phil@netroedge.com>, "
2100               "and Mark Studebaker <mdsxyz123@yahoo.com>");
2101 MODULE_DESCRIPTION("W83781D driver");
2102 MODULE_LICENSE("GPL");
2103
2104 module_init(sensors_w83781d_init);
2105 module_exit(sensors_w83781d_exit);