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   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
   8     This program is free software; you can redistribute it and/or modify
   9     it under the terms of the GNU General Public License as published by
  10     the Free Software Foundation; either version 2 of the License, or
  11     (at your option) any later version.
  12
  13     This program is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16     GNU General Public License for more details.
  17
  18     You should have received a copy of the GNU General Public License
  19     along with this program; if not, write to the Free Software
  20     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 /*
  24     Supports following chips:
  25
  26     Chip        #vin    #fanin  #pwm    #temp   wchipid vendid  i2c     ISA
  27     as99127f    7       3       0       3       0x31    0x12c3  yes     no
  28     as99127f rev.2 (type_name = as99127f)       0x31    0x5ca3  yes     no
  29     w83781d     7       3       0       3       0x10-1  0x5ca3  yes     yes
  30     w83627hf    9       3       2       3       0x21    0x5ca3  yes     yes(LPC)
  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 #include <linux/module.h>
  37 #include <linux/init.h>
  38 #include <linux/slab.h>
  39 #include <linux/jiffies.h>
  40 #include <linux/i2c.h>
  41 #include <linux/i2c-isa.h>
  42 #include <linux/i2c-sensor.h>
  43 #include <linux/i2c-vid.h>
  44 #include <linux/hwmon.h>
  45 #include <linux/err.h>
  46 #include <asm/io.h>
  47 #include "lm75.h"
  48
  49 /* Addresses to scan */
  50 static unsigned short normal_i2c[] = { 0x20, 0x21, 0x22, 0x23, 0x24, 0x25,
  51                                         0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
  52                                         0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END };
  53 static unsigned short isa_address = 0x290;
  54
  55 /* Insmod parameters */
  56 SENSORS_INSMOD_5(w83781d, w83782d, w83783s, w83627hf, as99127f);
  57 I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
  58                     "{bus, clientaddr, subclientaddr1, subclientaddr2}");
  59
  60 static int init = 1;
  61 module_param(init, bool, 0);
  62 MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization");
  63
  64 /* Constants specified below */
  65
  66 /* Length of ISA address segment */
  67 #define W83781D_EXTENT                  8
  68
  69 /* Where are the ISA address/data registers relative to the base address */
  70 #define W83781D_ADDR_REG_OFFSET         5
  71 #define W83781D_DATA_REG_OFFSET         6
  72
  73 /* The W83781D registers */
  74 /* The W83782D registers for nr=7,8 are in bank 5 */
  75 #define W83781D_REG_IN_MAX(nr)          ((nr < 7) ? (0x2b + (nr) * 2) : \
  76                                                     (0x554 + (((nr) - 7) * 2)))
  77 #define W83781D_REG_IN_MIN(nr)          ((nr < 7) ? (0x2c + (nr) * 2) : \
  78                                                     (0x555 + (((nr) - 7) * 2)))
  79 #define W83781D_REG_IN(nr)              ((nr < 7) ? (0x20 + (nr)) : \
  80                                                     (0x550 + (nr) - 7))
  81
  82 #define W83781D_REG_FAN_MIN(nr)         (0x3a + (nr))
  83 #define W83781D_REG_FAN(nr)             (0x27 + (nr))
  84
  85 #define W83781D_REG_BANK                0x4E
  86 #define W83781D_REG_TEMP2_CONFIG        0x152
  87 #define W83781D_REG_TEMP3_CONFIG        0x252
  88 #define W83781D_REG_TEMP(nr)            ((nr == 3) ? (0x0250) : \
  89                                         ((nr == 2) ? (0x0150) : \
  90                                                      (0x27)))
  91 #define W83781D_REG_TEMP_HYST(nr)       ((nr == 3) ? (0x253) : \
  92                                         ((nr == 2) ? (0x153) : \
  93                                                      (0x3A)))
  94 #define W83781D_REG_TEMP_OVER(nr)       ((nr == 3) ? (0x255) : \
  95                                         ((nr == 2) ? (0x155) : \
  96                                                      (0x39)))
  97
  98 #define W83781D_REG_CONFIG              0x40
  99 #define W83781D_REG_ALARM1              0x41
 100 #define W83781D_REG_ALARM2              0x42
 101 #define W83781D_REG_ALARM3              0x450   /* not on W83781D */
 102
 103 #define W83781D_REG_IRQ                 0x4C
 104 #define W83781D_REG_BEEP_CONFIG         0x4D
 105 #define W83781D_REG_BEEP_INTS1          0x56
 106 #define W83781D_REG_BEEP_INTS2          0x57
 107 #define W83781D_REG_BEEP_INTS3          0x453   /* not on W83781D */
 108
 109 #define W83781D_REG_VID_FANDIV          0x47
 110
 111 #define W83781D_REG_CHIPID              0x49
 112 #define W83781D_REG_WCHIPID             0x58
 113 #define W83781D_REG_CHIPMAN             0x4F
 114 #define W83781D_REG_PIN                 0x4B
 115
 116 /* 782D/783S only */
 117 #define W83781D_REG_VBAT                0x5D
 118
 119 /* PWM 782D (1-4) and 783S (1-2) only */
 120 #define W83781D_REG_PWM1                0x5B    /* 782d and 783s/627hf datasheets disagree */
 121                                                 /* on which is which; */
 122 #define W83781D_REG_PWM2                0x5A    /* We follow the 782d convention here, */
 123                                                 /* However 782d is probably wrong. */
 124 #define W83781D_REG_PWM3                0x5E
 125 #define W83781D_REG_PWM4                0x5F
 126 #define W83781D_REG_PWMCLK12            0x5C
 127 #define W83781D_REG_PWMCLK34            0x45C
 128 static const u8 regpwm[] = { W83781D_REG_PWM1, W83781D_REG_PWM2,
 129         W83781D_REG_PWM3, W83781D_REG_PWM4
 130 };
 131
 132 #define W83781D_REG_PWM(nr)             (regpwm[(nr) - 1])
 133
 134 #define W83781D_REG_I2C_ADDR            0x48
 135 #define W83781D_REG_I2C_SUBADDR         0x4A
 136
 137 /* The following are undocumented in the data sheets however we
 138    received the information in an email from Winbond tech support */
 139 /* Sensor selection - not on 781d */
 140 #define W83781D_REG_SCFG1               0x5D
 141 static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 };
 142
 143 #define W83781D_REG_SCFG2               0x59
 144 static const u8 BIT_SCFG2[] = { 0x10, 0x20, 0x40 };
 145
 146 #define W83781D_DEFAULT_BETA            3435
 147
 148 /* RT Table registers */
 149 #define W83781D_REG_RT_IDX              0x50
 150 #define W83781D_REG_RT_VAL              0x51
 151
 152 /* Conversions. Rounding and limit checking is only done on the TO_REG
 153    variants. Note that you should be a bit careful with which arguments
 154    these macros are called: arguments may be evaluated more than once.
 155    Fixing this is just not worth it. */
 156 #define IN_TO_REG(val)                  (SENSORS_LIMIT((((val) * 10 + 8)/16),0,255))
 157 #define IN_FROM_REG(val)                (((val) * 16) / 10)
 158
 159 static inline u8
 160 FAN_TO_REG(long rpm, int div)
 161 {
 162         if (rpm == 0)
 163                 return 255;
 164         rpm = SENSORS_LIMIT(rpm, 1, 1000000);
 165         return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
 166 }
 167
 168 #define FAN_FROM_REG(val,div)           ((val) == 0   ? -1 : \
 169                                         ((val) == 255 ? 0 : \
 170                                                         1350000 / ((val) * (div))))
 171
 172 #define TEMP_TO_REG(val)                (SENSORS_LIMIT(((val) < 0 ? (val)+0x100*1000 \
 173                                                 : (val)) / 1000, 0, 0xff))
 174 #define TEMP_FROM_REG(val)              (((val) & 0x80 ? (val)-0x100 : (val)) * 1000)
 175
 176 #define PWM_FROM_REG(val)               (val)
 177 #define PWM_TO_REG(val)                 (SENSORS_LIMIT((val),0,255))
 178 #define BEEP_MASK_FROM_REG(val,type)    ((type) == as99127f ? \
 179                                          (val) ^ 0x7fff : (val))
 180 #define BEEP_MASK_TO_REG(val,type)      ((type) == as99127f ? \
 181                                          (~(val)) & 0x7fff : (val) & 0xffffff)
 182
 183 #define BEEP_ENABLE_TO_REG(val)         ((val) ? 1 : 0)
 184 #define BEEP_ENABLE_FROM_REG(val)       ((val) ? 1 : 0)
 185
 186 #define DIV_FROM_REG(val)               (1 << (val))
 187
 188 static inline u8
 189 DIV_TO_REG(long val, enum chips type)
 190 {
 191         int i;
 192         val = SENSORS_LIMIT(val, 1,
 193                             ((type == w83781d
 194                               || type == as99127f) ? 8 : 128)) >> 1;
 195         for (i = 0; i < 7; i++) {
 196                 if (val == 0)
 197                         break;
 198                 val >>= 1;
 199         }
 200         return ((u8) i);
 201 }
 202
 203 /* There are some complications in a module like this. First off, W83781D chips
 204    may be both present on the SMBus and the ISA bus, and we have to handle
 205    those cases separately at some places. Second, there might be several
 206    W83781D chips available (well, actually, that is probably never done; but
 207    it is a clean illustration of how to handle a case like that). Finally,
 208    a specific chip may be attached to *both* ISA and SMBus, and we would
 209    not like to detect it double. Fortunately, in the case of the W83781D at
 210    least, a register tells us what SMBus address we are on, so that helps
 211    a bit - except if there could be more than one SMBus. Groan. No solution
 212    for this yet. */
 213
 214 /* This module may seem overly long and complicated. In fact, it is not so
 215    bad. Quite a lot of bookkeeping is done. A real driver can often cut
 216    some corners. */
 217
 218 /* For each registered W83781D, we need to keep some data in memory. That
 219    data is pointed to by w83781d_list[NR]->data. The structure itself is
 220    dynamically allocated, at the same time when a new w83781d client is
 221    allocated. */
 222 struct w83781d_data {
 223         struct i2c_client client;
 224         struct class_device *class_dev;
 225         struct semaphore lock;
 226         enum chips type;
 227
 228         struct semaphore update_lock;
 229         char valid;             /* !=0 if following fields are valid */
 230         unsigned long last_updated;     /* In jiffies */
 231
 232         struct i2c_client *lm75[2];     /* for secondary I2C addresses */
 233         /* array of 2 pointers to subclients */
 234
 235         u8 in[9];               /* Register value - 8 & 9 for 782D only */
 236         u8 in_max[9];           /* Register value - 8 & 9 for 782D only */
 237         u8 in_min[9];           /* Register value - 8 & 9 for 782D only */
 238         u8 fan[3];              /* Register value */
 239         u8 fan_min[3];          /* Register value */
 240         u8 temp;
 241         u8 temp_max;            /* Register value */
 242         u8 temp_max_hyst;       /* Register value */
 243         u16 temp_add[2];        /* Register value */
 244         u16 temp_max_add[2];    /* Register value */
 245         u16 temp_max_hyst_add[2];       /* Register value */
 246         u8 fan_div[3];          /* Register encoding, shifted right */
 247         u8 vid;                 /* Register encoding, combined */
 248         u32 alarms;             /* Register encoding, combined */
 249         u32 beep_mask;          /* Register encoding, combined */
 250         u8 beep_enable;         /* Boolean */
 251         u8 pwm[4];              /* Register value */
 252         u8 pwmenable[4];        /* Boolean */
 253         u16 sens[3];            /* 782D/783S only.
 254                                    1 = pentium diode; 2 = 3904 diode;
 255                                    3000-5000 = thermistor beta.
 256                                    Default = 3435.
 257                                    Other Betas unimplemented */
 258         u8 vrm;
 259 };
 260
 261 static int w83781d_attach_adapter(struct i2c_adapter *adapter);
 262 static int w83781d_isa_attach_adapter(struct i2c_adapter *adapter);
 263 static int w83781d_detect(struct i2c_adapter *adapter, int address, int kind);
 264 static int w83781d_detach_client(struct i2c_client *client);
 265
 266 static int w83781d_read_value(struct i2c_client *client, u16 register);
 267 static int w83781d_write_value(struct i2c_client *client, u16 register,
 268                                u16 value);
 269 static struct w83781d_data *w83781d_update_device(struct device *dev);
 270 static void w83781d_init_client(struct i2c_client *client);
 271
 272 static struct i2c_driver w83781d_driver = {
 273         .owner = THIS_MODULE,
 274         .name = "w83781d",
 275         .id = I2C_DRIVERID_W83781D,
 276         .flags = I2C_DF_NOTIFY,
 277         .attach_adapter = w83781d_attach_adapter,
 278         .detach_client = w83781d_detach_client,
 279 };
 280
 281 static struct i2c_driver w83781d_isa_driver = {
 282         .owner = THIS_MODULE,
 283         .name = "w83781d-isa",
 284         .attach_adapter = w83781d_isa_attach_adapter,
 285         .detach_client = w83781d_detach_client,
 286 };
 287
 288
 289 /* following are the sysfs callback functions */
 290 #define show_in_reg(reg) \
 291 static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
 292 { \
 293         struct w83781d_data *data = w83781d_update_device(dev); \
 294         return sprintf(buf,"%ld\n", (long)IN_FROM_REG(data->reg[nr] * 10)); \
 295 }
 296 show_in_reg(in);
 297 show_in_reg(in_min);
 298 show_in_reg(in_max);
 299
 300 #define store_in_reg(REG, reg) \
 301 static ssize_t store_in_##reg (struct device *dev, const char *buf, size_t count, int nr) \
 302 { \
 303         struct i2c_client *client = to_i2c_client(dev); \
 304         struct w83781d_data *data = i2c_get_clientdata(client); \
 305         u32 val; \
 306          \
 307         val = simple_strtoul(buf, NULL, 10) / 10; \
 308          \
 309         down(&data->update_lock); \
 310         data->in_##reg[nr] = IN_TO_REG(val); \
 311         w83781d_write_value(client, W83781D_REG_IN_##REG(nr), data->in_##reg[nr]); \
 312          \
 313         up(&data->update_lock); \
 314         return count; \
 315 }
 316 store_in_reg(MIN, min);
 317 store_in_reg(MAX, max);
 318
 319 #define sysfs_in_offset(offset) \
 320 static ssize_t \
 321 show_regs_in_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 322 { \
 323         return show_in(dev, buf, offset); \
 324 } \
 325 static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_regs_in_##offset, NULL);
 326
 327 #define sysfs_in_reg_offset(reg, offset) \
 328 static ssize_t show_regs_in_##reg##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 329 { \
 330         return show_in_##reg (dev, buf, offset); \
 331 } \
 332 static ssize_t store_regs_in_##reg##offset (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 333 { \
 334         return store_in_##reg (dev, buf, count, offset); \
 335 } \
 336 static DEVICE_ATTR(in##offset##_##reg, S_IRUGO| S_IWUSR, show_regs_in_##reg##offset, store_regs_in_##reg##offset);
 337
 338 #define sysfs_in_offsets(offset) \
 339 sysfs_in_offset(offset); \
 340 sysfs_in_reg_offset(min, offset); \
 341 sysfs_in_reg_offset(max, offset);
 342
 343 sysfs_in_offsets(0);
 344 sysfs_in_offsets(1);
 345 sysfs_in_offsets(2);
 346 sysfs_in_offsets(3);
 347 sysfs_in_offsets(4);
 348 sysfs_in_offsets(5);
 349 sysfs_in_offsets(6);
 350 sysfs_in_offsets(7);
 351 sysfs_in_offsets(8);
 352
 353 #define device_create_file_in(client, offset) \
 354 do { \
 355 device_create_file(&client->dev, &dev_attr_in##offset##_input); \
 356 device_create_file(&client->dev, &dev_attr_in##offset##_min); \
 357 device_create_file(&client->dev, &dev_attr_in##offset##_max); \
 358 } while (0)
 359
 360 #define show_fan_reg(reg) \
 361 static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
 362 { \
 363         struct w83781d_data *data = w83781d_update_device(dev); \
 364         return sprintf(buf,"%ld\n", \
 365                 FAN_FROM_REG(data->reg[nr-1], (long)DIV_FROM_REG(data->fan_div[nr-1]))); \
 366 }
 367 show_fan_reg(fan);
 368 show_fan_reg(fan_min);
 369
 370 static ssize_t
 371 store_fan_min(struct device *dev, const char *buf, size_t count, int nr)
 372 {
 373         struct i2c_client *client = to_i2c_client(dev);
 374         struct w83781d_data *data = i2c_get_clientdata(client);
 375         u32 val;
 376
 377         val = simple_strtoul(buf, NULL, 10);
 378
 379         down(&data->update_lock);
 380         data->fan_min[nr - 1] =
 381             FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr - 1]));
 382         w83781d_write_value(client, W83781D_REG_FAN_MIN(nr),
 383                             data->fan_min[nr - 1]);
 384
 385         up(&data->update_lock);
 386         return count;
 387 }
 388
 389 #define sysfs_fan_offset(offset) \
 390 static ssize_t show_regs_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 391 { \
 392         return show_fan(dev, buf, offset); \
 393 } \
 394 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_regs_fan_##offset, NULL);
 395
 396 #define sysfs_fan_min_offset(offset) \
 397 static ssize_t show_regs_fan_min##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 398 { \
 399         return show_fan_min(dev, buf, offset); \
 400 } \
 401 static ssize_t store_regs_fan_min##offset (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 402 { \
 403         return store_fan_min(dev, buf, count, offset); \
 404 } \
 405 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, show_regs_fan_min##offset, store_regs_fan_min##offset);
 406
 407 sysfs_fan_offset(1);
 408 sysfs_fan_min_offset(1);
 409 sysfs_fan_offset(2);
 410 sysfs_fan_min_offset(2);
 411 sysfs_fan_offset(3);
 412 sysfs_fan_min_offset(3);
 413
 414 #define device_create_file_fan(client, offset) \
 415 do { \
 416 device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
 417 device_create_file(&client->dev, &dev_attr_fan##offset##_min); \
 418 } while (0)
 419
 420 #define show_temp_reg(reg) \
 421 static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
 422 { \
 423         struct w83781d_data *data = w83781d_update_device(dev); \
 424         if (nr >= 2) {  /* TEMP2 and TEMP3 */ \
 425                 return sprintf(buf,"%d\n", \
 426                         LM75_TEMP_FROM_REG(data->reg##_add[nr-2])); \
 427         } else {        /* TEMP1 */ \
 428                 return sprintf(buf,"%ld\n", (long)TEMP_FROM_REG(data->reg)); \
 429         } \
 430 }
 431 show_temp_reg(temp);
 432 show_temp_reg(temp_max);
 433 show_temp_reg(temp_max_hyst);
 434
 435 #define store_temp_reg(REG, reg) \
 436 static ssize_t store_temp_##reg (struct device *dev, const char *buf, size_t count, int nr) \
 437 { \
 438         struct i2c_client *client = to_i2c_client(dev); \
 439         struct w83781d_data *data = i2c_get_clientdata(client); \
 440         s32 val; \
 441          \
 442         val = simple_strtol(buf, NULL, 10); \
 443          \
 444         down(&data->update_lock); \
 445          \
 446         if (nr >= 2) {  /* TEMP2 and TEMP3 */ \
 447                 data->temp_##reg##_add[nr-2] = LM75_TEMP_TO_REG(val); \
 448                 w83781d_write_value(client, W83781D_REG_TEMP_##REG(nr), \
 449                                 data->temp_##reg##_add[nr-2]); \
 450         } else {        /* TEMP1 */ \
 451                 data->temp_##reg = TEMP_TO_REG(val); \
 452                 w83781d_write_value(client, W83781D_REG_TEMP_##REG(nr), \
 453                         data->temp_##reg); \
 454         } \
 455          \
 456         up(&data->update_lock); \
 457         return count; \
 458 }
 459 store_temp_reg(OVER, max);
 460 store_temp_reg(HYST, max_hyst);
 461
 462 #define sysfs_temp_offset(offset) \
 463 static ssize_t \
 464 show_regs_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 465 { \
 466         return show_temp(dev, buf, offset); \
 467 } \
 468 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_regs_temp_##offset, NULL);
 469
 470 #define sysfs_temp_reg_offset(reg, offset) \
 471 static ssize_t show_regs_temp_##reg##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 472 { \
 473         return show_temp_##reg (dev, buf, offset); \
 474 } \
 475 static ssize_t store_regs_temp_##reg##offset (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 476 { \
 477         return store_temp_##reg (dev, buf, count, offset); \
 478 } \
 479 static DEVICE_ATTR(temp##offset##_##reg, S_IRUGO| S_IWUSR, show_regs_temp_##reg##offset, store_regs_temp_##reg##offset);
 480
 481 #define sysfs_temp_offsets(offset) \
 482 sysfs_temp_offset(offset); \
 483 sysfs_temp_reg_offset(max, offset); \
 484 sysfs_temp_reg_offset(max_hyst, offset);
 485
 486 sysfs_temp_offsets(1);
 487 sysfs_temp_offsets(2);
 488 sysfs_temp_offsets(3);
 489
 490 #define device_create_file_temp(client, offset) \
 491 do { \
 492 device_create_file(&client->dev, &dev_attr_temp##offset##_input); \
 493 device_create_file(&client->dev, &dev_attr_temp##offset##_max); \
 494 device_create_file(&client->dev, &dev_attr_temp##offset##_max_hyst); \
 495 } while (0)
 496
 497 static ssize_t
 498 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
 499 {
 500         struct w83781d_data *data = w83781d_update_device(dev);
 501         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
 502 }
 503
 504 static
 505 DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
 506 #define device_create_file_vid(client) \
 507 device_create_file(&client->dev, &dev_attr_cpu0_vid);
 508 static ssize_t
 509 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
 510 {
 511         struct w83781d_data *data = w83781d_update_device(dev);
 512         return sprintf(buf, "%ld\n", (long) data->vrm);
 513 }
 514
 515 static ssize_t
 516 store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 517 {
 518         struct i2c_client *client = to_i2c_client(dev);
 519         struct w83781d_data *data = i2c_get_clientdata(client);
 520         u32 val;
 521
 522         val = simple_strtoul(buf, NULL, 10);
 523         data->vrm = val;
 524
 525         return count;
 526 }
 527
 528 static
 529 DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
 530 #define device_create_file_vrm(client) \
 531 device_create_file(&client->dev, &dev_attr_vrm);
 532 static ssize_t
 533 show_alarms_reg(struct device *dev, struct device_attribute *attr, char *buf)
 534 {
 535         struct w83781d_data *data = w83781d_update_device(dev);
 536         return sprintf(buf, "%u\n", data->alarms);
 537 }
 538
 539 static
 540 DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
 541 #define device_create_file_alarms(client) \
 542 device_create_file(&client->dev, &dev_attr_alarms);
 543 static ssize_t show_beep_mask (struct device *dev, struct device_attribute *attr, char *buf)
 544 {
 545         struct w83781d_data *data = w83781d_update_device(dev);
 546         return sprintf(buf, "%ld\n",
 547                        (long)BEEP_MASK_FROM_REG(data->beep_mask, data->type));
 548 }
 549 static ssize_t show_beep_enable (struct device *dev, struct device_attribute *attr, char *buf)
 550 {
 551         struct w83781d_data *data = w83781d_update_device(dev);
 552         return sprintf(buf, "%ld\n",
 553                        (long)BEEP_ENABLE_FROM_REG(data->beep_enable));
 554 }
 555
 556 #define BEEP_ENABLE                     0       /* Store beep_enable */
 557 #define BEEP_MASK                       1       /* Store beep_mask */
 558
 559 static ssize_t
 560 store_beep_reg(struct device *dev, const char *buf, size_t count,
 561                int update_mask)
 562 {
 563         struct i2c_client *client = to_i2c_client(dev);
 564         struct w83781d_data *data = i2c_get_clientdata(client);
 565         u32 val, val2;
 566
 567         val = simple_strtoul(buf, NULL, 10);
 568
 569         down(&data->update_lock);
 570
 571         if (update_mask == BEEP_MASK) { /* We are storing beep_mask */
 572                 data->beep_mask = BEEP_MASK_TO_REG(val, data->type);
 573                 w83781d_write_value(client, W83781D_REG_BEEP_INTS1,
 574                                     data->beep_mask & 0xff);
 575
 576                 if ((data->type != w83781d) && (data->type != as99127f)) {
 577                         w83781d_write_value(client, W83781D_REG_BEEP_INTS3,
 578                                             ((data->beep_mask) >> 16) & 0xff);
 579                 }
 580
 581                 val2 = (data->beep_mask >> 8) & 0x7f;
 582         } else {                /* We are storing beep_enable */
 583                 val2 = w83781d_read_value(client, W83781D_REG_BEEP_INTS2) & 0x7f;
 584                 data->beep_enable = BEEP_ENABLE_TO_REG(val);
 585         }
 586
 587         w83781d_write_value(client, W83781D_REG_BEEP_INTS2,
 588                             val2 | data->beep_enable << 7);
 589
 590         up(&data->update_lock);
 591         return count;
 592 }
 593
 594 #define sysfs_beep(REG, reg) \
 595 static ssize_t show_regs_beep_##reg (struct device *dev, struct device_attribute *attr, char *buf) \
 596 { \
 597         return show_beep_##reg(dev, attr, buf); \
 598 } \
 599 static ssize_t store_regs_beep_##reg (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 600 { \
 601         return store_beep_reg(dev, buf, count, BEEP_##REG); \
 602 } \
 603 static DEVICE_ATTR(beep_##reg, S_IRUGO | S_IWUSR, show_regs_beep_##reg, store_regs_beep_##reg);
 604
 605 sysfs_beep(ENABLE, enable);
 606 sysfs_beep(MASK, mask);
 607
 608 #define device_create_file_beep(client) \
 609 do { \
 610 device_create_file(&client->dev, &dev_attr_beep_enable); \
 611 device_create_file(&client->dev, &dev_attr_beep_mask); \
 612 } while (0)
 613
 614 static ssize_t
 615 show_fan_div_reg(struct device *dev, char *buf, int nr)
 616 {
 617         struct w83781d_data *data = w83781d_update_device(dev);
 618         return sprintf(buf, "%ld\n",
 619                        (long) DIV_FROM_REG(data->fan_div[nr - 1]));
 620 }
 621
 622 /* Note: we save and restore the fan minimum here, because its value is
 623    determined in part by the fan divisor.  This follows the principle of
 624    least suprise; the user doesn't expect the fan minimum to change just
 625    because the divisor changed. */
 626 static ssize_t
 627 store_fan_div_reg(struct device *dev, const char *buf, size_t count, int nr)
 628 {
 629         struct i2c_client *client = to_i2c_client(dev);
 630         struct w83781d_data *data = i2c_get_clientdata(client);
 631         unsigned long min;
 632         u8 reg;
 633         unsigned long val = simple_strtoul(buf, NULL, 10);
 634
 635         down(&data->update_lock);
 636
 637         /* Save fan_min */
 638         min = FAN_FROM_REG(data->fan_min[nr],
 639                            DIV_FROM_REG(data->fan_div[nr]));
 640
 641         data->fan_div[nr] = DIV_TO_REG(val, data->type);
 642
 643         reg = (w83781d_read_value(client, nr==2 ? W83781D_REG_PIN : W83781D_REG_VID_FANDIV)
 644                & (nr==0 ? 0xcf : 0x3f))
 645             | ((data->fan_div[nr] & 0x03) << (nr==0 ? 4 : 6));
 646         w83781d_write_value(client, nr==2 ? W83781D_REG_PIN : W83781D_REG_VID_FANDIV, reg);
 647
 648         /* w83781d and as99127f don't have extended divisor bits */
 649         if (data->type != w83781d && data->type != as99127f) {
 650                 reg = (w83781d_read_value(client, W83781D_REG_VBAT)
 651                        & ~(1 << (5 + nr)))
 652                     | ((data->fan_div[nr] & 0x04) << (3 + nr));
 653                 w83781d_write_value(client, W83781D_REG_VBAT, reg);
 654         }
 655
 656         /* Restore fan_min */
 657         data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 658         w83781d_write_value(client, W83781D_REG_FAN_MIN(nr+1), data->fan_min[nr]);
 659
 660         up(&data->update_lock);
 661         return count;
 662 }
 663
 664 #define sysfs_fan_div(offset) \
 665 static ssize_t show_regs_fan_div_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 666 { \
 667         return show_fan_div_reg(dev, buf, offset); \
 668 } \
 669 static ssize_t store_regs_fan_div_##offset (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 670 { \
 671         return store_fan_div_reg(dev, buf, count, offset - 1); \
 672 } \
 673 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, show_regs_fan_div_##offset, store_regs_fan_div_##offset);
 674
 675 sysfs_fan_div(1);
 676 sysfs_fan_div(2);
 677 sysfs_fan_div(3);
 678
 679 #define device_create_file_fan_div(client, offset) \
 680 do { \
 681 device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
 682 } while (0)
 683
 684 static ssize_t
 685 show_pwm_reg(struct device *dev, char *buf, int nr)
 686 {
 687         struct w83781d_data *data = w83781d_update_device(dev);
 688         return sprintf(buf, "%ld\n", (long) PWM_FROM_REG(data->pwm[nr - 1]));
 689 }
 690
 691 static ssize_t
 692 show_pwmenable_reg(struct device *dev, char *buf, int nr)
 693 {
 694         struct w83781d_data *data = w83781d_update_device(dev);
 695         return sprintf(buf, "%ld\n", (long) data->pwmenable[nr - 1]);
 696 }
 697
 698 static ssize_t
 699 store_pwm_reg(struct device *dev, const char *buf, size_t count, int nr)
 700 {
 701         struct i2c_client *client = to_i2c_client(dev);
 702         struct w83781d_data *data = i2c_get_clientdata(client);
 703         u32 val;
 704
 705         val = simple_strtoul(buf, NULL, 10);
 706
 707         down(&data->update_lock);
 708         data->pwm[nr - 1] = PWM_TO_REG(val);
 709         w83781d_write_value(client, W83781D_REG_PWM(nr), data->pwm[nr - 1]);
 710         up(&data->update_lock);
 711         return count;
 712 }
 713
 714 static ssize_t
 715 store_pwmenable_reg(struct device *dev, const char *buf, size_t count, int nr)
 716 {
 717         struct i2c_client *client = to_i2c_client(dev);
 718         struct w83781d_data *data = i2c_get_clientdata(client);
 719         u32 val, reg;
 720
 721         val = simple_strtoul(buf, NULL, 10);
 722
 723         down(&data->update_lock);
 724
 725         switch (val) {
 726         case 0:
 727         case 1:
 728                 reg = w83781d_read_value(client, W83781D_REG_PWMCLK12);
 729                 w83781d_write_value(client, W83781D_REG_PWMCLK12,
 730                                     (reg & 0xf7) | (val << 3));
 731
 732                 reg = w83781d_read_value(client, W83781D_REG_BEEP_CONFIG);
 733                 w83781d_write_value(client, W83781D_REG_BEEP_CONFIG,
 734                                     (reg & 0xef) | (!val << 4));
 735
 736                 data->pwmenable[nr - 1] = val;
 737                 break;
 738
 739         default:
 740                 up(&data->update_lock);
 741                 return -EINVAL;
 742         }
 743
 744         up(&data->update_lock);
 745         return count;
 746 }
 747
 748 #define sysfs_pwm(offset) \
 749 static ssize_t show_regs_pwm_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 750 { \
 751         return show_pwm_reg(dev, buf, offset); \
 752 } \
 753 static ssize_t store_regs_pwm_##offset (struct device *dev, struct device_attribute *attr, \
 754                 const char *buf, size_t count) \
 755 { \
 756         return store_pwm_reg(dev, buf, count, offset); \
 757 } \
 758 static DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
 759                 show_regs_pwm_##offset, store_regs_pwm_##offset);
 760
 761 #define sysfs_pwmenable(offset) \
 762 static ssize_t show_regs_pwmenable_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 763 { \
 764         return show_pwmenable_reg(dev, buf, offset); \
 765 } \
 766 static ssize_t store_regs_pwmenable_##offset (struct device *dev, struct device_attribute *attr, \
 767                 const char *buf, size_t count) \
 768 { \
 769         return store_pwmenable_reg(dev, buf, count, offset); \
 770 } \
 771 static DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
 772                 show_regs_pwmenable_##offset, store_regs_pwmenable_##offset);
 773
 774 sysfs_pwm(1);
 775 sysfs_pwm(2);
 776 sysfs_pwmenable(2);             /* only PWM2 can be enabled/disabled */
 777 sysfs_pwm(3);
 778 sysfs_pwm(4);
 779
 780 #define device_create_file_pwm(client, offset) \
 781 do { \
 782 device_create_file(&client->dev, &dev_attr_pwm##offset); \
 783 } while (0)
 784
 785 #define device_create_file_pwmenable(client, offset) \
 786 do { \
 787 device_create_file(&client->dev, &dev_attr_pwm##offset##_enable); \
 788 } while (0)
 789
 790 static ssize_t
 791 show_sensor_reg(struct device *dev, char *buf, int nr)
 792 {
 793         struct w83781d_data *data = w83781d_update_device(dev);
 794         return sprintf(buf, "%ld\n", (long) data->sens[nr - 1]);
 795 }
 796
 797 static ssize_t
 798 store_sensor_reg(struct device *dev, const char *buf, size_t count, int nr)
 799 {
 800         struct i2c_client *client = to_i2c_client(dev);
 801         struct w83781d_data *data = i2c_get_clientdata(client);
 802         u32 val, tmp;
 803
 804         val = simple_strtoul(buf, NULL, 10);
 805
 806         down(&data->update_lock);
 807
 808         switch (val) {
 809         case 1:         /* PII/Celeron diode */
 810                 tmp = w83781d_read_value(client, W83781D_REG_SCFG1);
 811                 w83781d_write_value(client, W83781D_REG_SCFG1,
 812                                     tmp | BIT_SCFG1[nr - 1]);
 813                 tmp = w83781d_read_value(client, W83781D_REG_SCFG2);
 814                 w83781d_write_value(client, W83781D_REG_SCFG2,
 815                                     tmp | BIT_SCFG2[nr - 1]);
 816                 data->sens[nr - 1] = val;
 817                 break;
 818         case 2:         /* 3904 */
 819                 tmp = w83781d_read_value(client, W83781D_REG_SCFG1);
 820                 w83781d_write_value(client, W83781D_REG_SCFG1,
 821                                     tmp | BIT_SCFG1[nr - 1]);
 822                 tmp = w83781d_read_value(client, W83781D_REG_SCFG2);
 823                 w83781d_write_value(client, W83781D_REG_SCFG2,
 824                                     tmp & ~BIT_SCFG2[nr - 1]);
 825                 data->sens[nr - 1] = val;
 826                 break;
 827         case W83781D_DEFAULT_BETA:      /* thermistor */
 828                 tmp = w83781d_read_value(client, W83781D_REG_SCFG1);
 829                 w83781d_write_value(client, W83781D_REG_SCFG1,
 830                                     tmp & ~BIT_SCFG1[nr - 1]);
 831                 data->sens[nr - 1] = val;
 832                 break;
 833         default:
 834                 dev_err(dev, "Invalid sensor type %ld; must be 1, 2, or %d\n",
 835                        (long) val, W83781D_DEFAULT_BETA);
 836                 break;
 837         }
 838
 839         up(&data->update_lock);
 840         return count;
 841 }
 842
 843 #define sysfs_sensor(offset) \
 844 static ssize_t show_regs_sensor_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 845 { \
 846     return show_sensor_reg(dev, buf, offset); \
 847 } \
 848 static ssize_t store_regs_sensor_##offset (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 849 { \
 850     return store_sensor_reg(dev, buf, count, offset); \
 851 } \
 852 static DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, show_regs_sensor_##offset, store_regs_sensor_##offset);
 853
 854 sysfs_sensor(1);
 855 sysfs_sensor(2);
 856 sysfs_sensor(3);
 857
 858 #define device_create_file_sensor(client, offset) \
 859 do { \
 860 device_create_file(&client->dev, &dev_attr_temp##offset##_type); \
 861 } while (0)
 862
 863 /* This function is called when:
 864      * w83781d_driver is inserted (when this module is loaded), for each
 865        available adapter
 866      * when a new adapter is inserted (and w83781d_driver is still present) */
 867 static int
 868 w83781d_attach_adapter(struct i2c_adapter *adapter)
 869 {
 870         if (!(adapter->class & I2C_CLASS_HWMON))
 871                 return 0;
 872         return i2c_probe(adapter, &addr_data, w83781d_detect);
 873 }
 874
 875 static int
 876 w83781d_isa_attach_adapter(struct i2c_adapter *adapter)
 877 {
 878         return w83781d_detect(adapter, isa_address, -1);
 879 }
 880
 881 /* Assumes that adapter is of I2C, not ISA variety.
 882  * OTHERWISE DON'T CALL THIS
 883  */
 884 static int
 885 w83781d_detect_subclients(struct i2c_adapter *adapter, int address, int kind,
 886                 struct i2c_client *new_client)
 887 {
 888         int i, val1 = 0, id;
 889         int err;
 890         const char *client_name = "";
 891         struct w83781d_data *data = i2c_get_clientdata(new_client);
 892
 893         data->lm75[0] = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
 894         if (!(data->lm75[0])) {
 895                 err = -ENOMEM;
 896                 goto ERROR_SC_0;
 897         }
 898         memset(data->lm75[0], 0x00, sizeof (struct i2c_client));
 899
 900         id = i2c_adapter_id(adapter);
 901
 902         if (force_subclients[0] == id && force_subclients[1] == address) {
 903                 for (i = 2; i <= 3; i++) {
 904                         if (force_subclients[i] < 0x48 ||
 905                             force_subclients[i] > 0x4f) {
 906                                 dev_err(&new_client->dev, "Invalid subclient "
 907                                         "address %d; must be 0x48-0x4f\n",
 908                                         force_subclients[i]);
 909                                 err = -EINVAL;
 910                                 goto ERROR_SC_1;
 911                         }
 912                 }
 913                 w83781d_write_value(new_client, W83781D_REG_I2C_SUBADDR,
 914                                 (force_subclients[2] & 0x07) |
 915                                 ((force_subclients[3] & 0x07) << 4));
 916                 data->lm75[0]->addr = force_subclients[2];
 917         } else {
 918                 val1 = w83781d_read_value(new_client, W83781D_REG_I2C_SUBADDR);
 919                 data->lm75[0]->addr = 0x48 + (val1 & 0x07);
 920         }
 921
 922         if (kind != w83783s) {
 923
 924                 data->lm75[1] = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
 925                 if (!(data->lm75[1])) {
 926                         err = -ENOMEM;
 927                         goto ERROR_SC_1;
 928                 }
 929                 memset(data->lm75[1], 0x0, sizeof(struct i2c_client));
 930
 931                 if (force_subclients[0] == id &&
 932                     force_subclients[1] == address) {
 933                         data->lm75[1]->addr = force_subclients[3];
 934                 } else {
 935                         data->lm75[1]->addr = 0x48 + ((val1 >> 4) & 0x07);
 936                 }
 937                 if (data->lm75[0]->addr == data->lm75[1]->addr) {
 938                         dev_err(&new_client->dev,
 939                                "Duplicate addresses 0x%x for subclients.\n",
 940                                data->lm75[0]->addr);
 941                         err = -EBUSY;
 942                         goto ERROR_SC_2;
 943                 }
 944         }
 945
 946         if (kind == w83781d)
 947                 client_name = "w83781d subclient";
 948         else if (kind == w83782d)
 949                 client_name = "w83782d subclient";
 950         else if (kind == w83783s)
 951                 client_name = "w83783s subclient";
 952         else if (kind == w83627hf)
 953                 client_name = "w83627hf subclient";
 954         else if (kind == as99127f)
 955                 client_name = "as99127f subclient";
 956
 957         for (i = 0; i <= 1; i++) {
 958                 /* store all data in w83781d */
 959                 i2c_set_clientdata(data->lm75[i], NULL);
 960                 data->lm75[i]->adapter = adapter;
 961                 data->lm75[i]->driver = &w83781d_driver;
 962                 data->lm75[i]->flags = 0;
 963                 strlcpy(data->lm75[i]->name, client_name,
 964                         I2C_NAME_SIZE);
 965                 if ((err = i2c_attach_client(data->lm75[i]))) {
 966                         dev_err(&new_client->dev, "Subclient %d "
 967                                 "registration at address 0x%x "
 968                                 "failed.\n", i, data->lm75[i]->addr);
 969                         if (i == 1)
 970                                 goto ERROR_SC_3;
 971                         goto ERROR_SC_2;
 972                 }
 973                 if (kind == w83783s)
 974                         break;
 975         }
 976
 977         return 0;
 978
 979 /* Undo inits in case of errors */
 980 ERROR_SC_3:
 981         i2c_detach_client(data->lm75[0]);
 982 ERROR_SC_2:
 983         if (data->lm75[1])
 984                 kfree(data->lm75[1]);
 985 ERROR_SC_1:
 986         if (data->lm75[0])
 987                 kfree(data->lm75[0]);
 988 ERROR_SC_0:
 989         return err;
 990 }
 991
 992 static int
 993 w83781d_detect(struct i2c_adapter *adapter, int address, int kind)
 994 {
 995         int i = 0, val1 = 0, val2;
 996         struct i2c_client *new_client;
 997         struct w83781d_data *data;
 998         int err;
 999         const char *client_name = "";
1000         int is_isa = i2c_is_isa_adapter(adapter);
1001         enum vendor { winbond, asus } vendid;
1002
1003         if (!is_isa
1004             && !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1005                 err = -EINVAL;
1006                 goto ERROR0;
1007         }
1008
1009         /* Prevent users from forcing a kind for a bus it isn't supposed
1010            to possibly be on */
1011         if (is_isa && (kind == as99127f || kind == w83783s)) {
1012                 dev_err(&adapter->dev,
1013                         "Cannot force I2C-only chip for ISA address 0x%02x.\n",
1014                         address);
1015                 err = -EINVAL;
1016                 goto ERROR0;
1017         }
1018
1019         if (is_isa)
1020                 if (!request_region(address, W83781D_EXTENT,
1021                                     w83781d_isa_driver.name)) {
1022                         dev_dbg(&adapter->dev, "Request of region "
1023                                 "0x%x-0x%x for w83781d failed\n", address,
1024                                 address + W83781D_EXTENT - 1);
1025                         err = -EBUSY;
1026                         goto ERROR0;
1027                 }
1028
1029         /* Probe whether there is anything available on this address. Already
1030            done for SMBus clients */
1031         if (kind < 0) {
1032                 if (is_isa) {
1033
1034 #define REALLY_SLOW_IO
1035                         /* We need the timeouts for at least some LM78-like
1036                            chips. But only if we read 'undefined' registers. */
1037                         i = inb_p(address + 1);
1038                         if (inb_p(address + 2) != i
1039                          || inb_p(address + 3) != i
1040                          || inb_p(address + 7) != i) {
1041                                 dev_dbg(&adapter->dev, "Detection of w83781d "
1042                                         "chip failed at step 1\n");
1043                                 err = -ENODEV;
1044                                 goto ERROR1;
1045                         }
1046 #undef REALLY_SLOW_IO
1047
1048                         /* Let's just hope nothing breaks here */
1049                         i = inb_p(address + 5) & 0x7f;
1050                         outb_p(~i & 0x7f, address + 5);
1051                         val2 = inb_p(address + 5) & 0x7f;
1052                         if (val2 != (~i & 0x7f)) {
1053                                 outb_p(i, address + 5);
1054                                 dev_dbg(&adapter->dev, "Detection of w83781d "
1055                                         "chip failed at step 2 (0x%x != "
1056                                         "0x%x at 0x%x)\n", val2, ~i & 0x7f,
1057                                         address + 5);
1058                                 err = -ENODEV;
1059                                 goto ERROR1;
1060                         }
1061                 }
1062         }
1063
1064         /* OK. For now, we presume we have a valid client. We now create the
1065            client structure, even though we cannot fill it completely yet.
1066            But it allows us to access w83781d_{read,write}_value. */
1067
1068         if (!(data = kmalloc(sizeof(struct w83781d_data), GFP_KERNEL))) {
1069                 err = -ENOMEM;
1070                 goto ERROR1;
1071         }
1072         memset(data, 0, sizeof(struct w83781d_data));
1073
1074         new_client = &data->client;
1075         i2c_set_clientdata(new_client, data);
1076         new_client->addr = address;
1077         init_MUTEX(&data->lock);
1078         new_client->adapter = adapter;
1079         new_client->driver = is_isa ? &w83781d_isa_driver : &w83781d_driver;
1080         new_client->flags = 0;
1081
1082         /* Now, we do the remaining detection. */
1083
1084         /* The w8378?d may be stuck in some other bank than bank 0. This may
1085            make reading other information impossible. Specify a force=... or
1086            force_*=... parameter, and the Winbond will be reset to the right
1087            bank. */
1088         if (kind < 0) {
1089                 if (w83781d_read_value(new_client, W83781D_REG_CONFIG) & 0x80) {
1090                         dev_dbg(&new_client->dev, "Detection failed at step "
1091                                 "3\n");
1092                         err = -ENODEV;
1093                         goto ERROR2;
1094                 }
1095                 val1 = w83781d_read_value(new_client, W83781D_REG_BANK);
1096                 val2 = w83781d_read_value(new_client, W83781D_REG_CHIPMAN);
1097                 /* Check for Winbond or Asus ID if in bank 0 */
1098                 if ((!(val1 & 0x07)) &&
1099                     (((!(val1 & 0x80)) && (val2 != 0xa3) && (val2 != 0xc3))
1100                      || ((val1 & 0x80) && (val2 != 0x5c) && (val2 != 0x12)))) {
1101                         dev_dbg(&new_client->dev, "Detection failed at step "
1102                                 "4\n");
1103                         err = -ENODEV;
1104                         goto ERROR2;
1105                 }
1106                 /* If Winbond SMBus, check address at 0x48.
1107                    Asus doesn't support, except for as99127f rev.2 */
1108                 if ((!is_isa) && (((!(val1 & 0x80)) && (val2 == 0xa3)) ||
1109                                   ((val1 & 0x80) && (val2 == 0x5c)))) {
1110                         if (w83781d_read_value
1111                             (new_client, W83781D_REG_I2C_ADDR) != address) {
1112                                 dev_dbg(&new_client->dev, "Detection failed "
1113                                         "at step 5\n");
1114                                 err = -ENODEV;
1115                                 goto ERROR2;
1116                         }
1117                 }
1118         }
1119
1120         /* We have either had a force parameter, or we have already detected the
1121            Winbond. Put it now into bank 0 and Vendor ID High Byte */
1122         w83781d_write_value(new_client, W83781D_REG_BANK,
1123                             (w83781d_read_value(new_client,
1124                                                 W83781D_REG_BANK) & 0x78) |
1125                             0x80);
1126
1127         /* Determine the chip type. */
1128         if (kind <= 0) {
1129                 /* get vendor ID */
1130                 val2 = w83781d_read_value(new_client, W83781D_REG_CHIPMAN);
1131                 if (val2 == 0x5c)
1132                         vendid = winbond;
1133                 else if (val2 == 0x12)
1134                         vendid = asus;
1135                 else {
1136                         dev_dbg(&new_client->dev, "Chip was made by neither "
1137                                 "Winbond nor Asus?\n");
1138                         err = -ENODEV;
1139                         goto ERROR2;
1140                 }
1141
1142                 val1 = w83781d_read_value(new_client, W83781D_REG_WCHIPID);
1143                 if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond)
1144                         kind = w83781d;
1145                 else if (val1 == 0x30 && vendid == winbond)
1146                         kind = w83782d;
1147                 else if (val1 == 0x40 && vendid == winbond && !is_isa
1148                                 && address == 0x2d)
1149                         kind = w83783s;
1150                 else if (val1 == 0x21 && vendid == winbond)
1151                         kind = w83627hf;
1152                 else if (val1 == 0x31 && !is_isa && address >= 0x28)
1153                         kind = as99127f;
1154                 else {
1155                         if (kind == 0)
1156                                 dev_warn(&new_client->dev, "Ignoring 'force' "
1157                                          "parameter for unknown chip at "
1158                                          "adapter %d, address 0x%02x\n",
1159                                          i2c_adapter_id(adapter), address);
1160                         err = -EINVAL;
1161                         goto ERROR2;
1162                 }
1163         }
1164
1165         if (kind == w83781d) {
1166                 client_name = "w83781d";
1167         } else if (kind == w83782d) {
1168                 client_name = "w83782d";
1169         } else if (kind == w83783s) {
1170                 client_name = "w83783s";
1171         } else if (kind == w83627hf) {
1172                 client_name = "w83627hf";
1173         } else if (kind == as99127f) {
1174                 client_name = "as99127f";
1175         }
1176
1177         /* Fill in the remaining client fields and put into the global list */
1178         strlcpy(new_client->name, client_name, I2C_NAME_SIZE);
1179         data->type = kind;
1180
1181         data->valid = 0;
1182         init_MUTEX(&data->update_lock);
1183
1184         /* Tell the I2C layer a new client has arrived */
1185         if ((err = i2c_attach_client(new_client)))
1186                 goto ERROR2;
1187
1188         /* attach secondary i2c lm75-like clients */
1189         if (!is_isa) {
1190                 if ((err = w83781d_detect_subclients(adapter, address,
1191                                 kind, new_client)))
1192                         goto ERROR3;
1193         } else {
1194                 data->lm75[0] = NULL;
1195                 data->lm75[1] = NULL;
1196         }
1197
1198         /* Initialize the chip */
1199         w83781d_init_client(new_client);
1200
1201         /* A few vars need to be filled upon startup */
1202         for (i = 1; i <= 3; i++) {
1203                 data->fan_min[i - 1] = w83781d_read_value(new_client,
1204                                         W83781D_REG_FAN_MIN(i));
1205         }
1206         if (kind != w83781d && kind != as99127f)
1207                 for (i = 0; i < 4; i++)
1208                         data->pwmenable[i] = 1;
1209
1210         /* Register sysfs hooks */
1211         data->class_dev = hwmon_device_register(&new_client->dev);
1212         if (IS_ERR(data->class_dev)) {
1213                 err = PTR_ERR(data->class_dev);
1214                 goto ERROR4;
1215         }
1216
1217         device_create_file_in(new_client, 0);
1218         if (kind != w83783s)
1219                 device_create_file_in(new_client, 1);
1220         device_create_file_in(new_client, 2);
1221         device_create_file_in(new_client, 3);
1222         device_create_file_in(new_client, 4);
1223         device_create_file_in(new_client, 5);
1224         device_create_file_in(new_client, 6);
1225         if (kind != as99127f && kind != w83781d && kind != w83783s) {
1226                 device_create_file_in(new_client, 7);
1227                 device_create_file_in(new_client, 8);
1228         }
1229
1230         device_create_file_fan(new_client, 1);
1231         device_create_file_fan(new_client, 2);
1232         device_create_file_fan(new_client, 3);
1233
1234         device_create_file_temp(new_client, 1);
1235         device_create_file_temp(new_client, 2);
1236         if (kind != w83783s)
1237                 device_create_file_temp(new_client, 3);
1238
1239         device_create_file_vid(new_client);
1240         device_create_file_vrm(new_client);
1241
1242         device_create_file_fan_div(new_client, 1);
1243         device_create_file_fan_div(new_client, 2);
1244         device_create_file_fan_div(new_client, 3);
1245
1246         device_create_file_alarms(new_client);
1247
1248         device_create_file_beep(new_client);
1249
1250         if (kind != w83781d && kind != as99127f) {
1251                 device_create_file_pwm(new_client, 1);
1252                 device_create_file_pwm(new_client, 2);
1253                 device_create_file_pwmenable(new_client, 2);
1254         }
1255         if (kind == w83782d && !is_isa) {
1256                 device_create_file_pwm(new_client, 3);
1257                 device_create_file_pwm(new_client, 4);
1258         }
1259
1260         if (kind != as99127f && kind != w83781d) {
1261                 device_create_file_sensor(new_client, 1);
1262                 device_create_file_sensor(new_client, 2);
1263                 if (kind != w83783s)
1264                         device_create_file_sensor(new_client, 3);
1265         }
1266
1267         return 0;
1268
1269 ERROR4:
1270         if (data->lm75[1]) {
1271                 i2c_detach_client(data->lm75[1]);
1272                 kfree(data->lm75[1]);
1273         }
1274         if (data->lm75[0]) {
1275                 i2c_detach_client(data->lm75[0]);
1276                 kfree(data->lm75[0]);
1277         }
1278 ERROR3:
1279         i2c_detach_client(new_client);
1280 ERROR2:
1281         kfree(data);
1282 ERROR1:
1283         if (is_isa)
1284                 release_region(address, W83781D_EXTENT);
1285 ERROR0:
1286         return err;
1287 }
1288
1289 static int
1290 w83781d_detach_client(struct i2c_client *client)
1291 {
1292         struct w83781d_data *data = i2c_get_clientdata(client);
1293         int err;
1294
1295         /* main client */
1296         if (data)
1297                 hwmon_device_unregister(data->class_dev);
1298
1299         if (i2c_is_isa_client(client))
1300                 release_region(client->addr, W83781D_EXTENT);
1301
1302         if ((err = i2c_detach_client(client)))
1303                 return err;
1304
1305         /* main client */
1306         if (data)
1307                 kfree(data);
1308
1309         /* subclient */
1310         else
1311                 kfree(client);
1312
1313         return 0;
1314 }
1315
1316 /* The SMBus locks itself, usually, but nothing may access the Winbond between
1317    bank switches. ISA access must always be locked explicitly!
1318    We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks,
1319    would slow down the W83781D access and should not be necessary.
1320    There are some ugly typecasts here, but the good news is - they should
1321    nowhere else be necessary! */
1322 static int
1323 w83781d_read_value(struct i2c_client *client, u16 reg)
1324 {
1325         struct w83781d_data *data = i2c_get_clientdata(client);
1326         int res, word_sized, bank;
1327         struct i2c_client *cl;
1328
1329         down(&data->lock);
1330         if (i2c_is_isa_client(client)) {
1331                 word_sized = (((reg & 0xff00) == 0x100)
1332                               || ((reg & 0xff00) == 0x200))
1333                     && (((reg & 0x00ff) == 0x50)
1334                         || ((reg & 0x00ff) == 0x53)
1335                         || ((reg & 0x00ff) == 0x55));
1336                 if (reg & 0xff00) {
1337                         outb_p(W83781D_REG_BANK,
1338                                client->addr + W83781D_ADDR_REG_OFFSET);
1339                         outb_p(reg >> 8,
1340                                client->addr + W83781D_DATA_REG_OFFSET);
1341                 }
1342                 outb_p(reg & 0xff, client->addr + W83781D_ADDR_REG_OFFSET);
1343                 res = inb_p(client->addr + W83781D_DATA_REG_OFFSET);
1344                 if (word_sized) {
1345                         outb_p((reg & 0xff) + 1,
1346                                client->addr + W83781D_ADDR_REG_OFFSET);
1347                         res =
1348                             (res << 8) + inb_p(client->addr +
1349                                                W83781D_DATA_REG_OFFSET);
1350                 }
1351                 if (reg & 0xff00) {
1352                         outb_p(W83781D_REG_BANK,
1353                                client->addr + W83781D_ADDR_REG_OFFSET);
1354                         outb_p(0, client->addr + W83781D_DATA_REG_OFFSET);
1355                 }
1356         } else {
1357                 bank = (reg >> 8) & 0x0f;
1358                 if (bank > 2)
1359                         /* switch banks */
1360                         i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1361                                                   bank);
1362                 if (bank == 0 || bank > 2) {
1363                         res = i2c_smbus_read_byte_data(client, reg & 0xff);
1364                 } else {
1365                         /* switch to subclient */
1366                         cl = data->lm75[bank - 1];
1367                         /* convert from ISA to LM75 I2C addresses */
1368                         switch (reg & 0xff) {
1369                         case 0x50:      /* TEMP */
1370                                 res = swab16(i2c_smbus_read_word_data(cl, 0));
1371                                 break;
1372                         case 0x52:      /* CONFIG */
1373                                 res = i2c_smbus_read_byte_data(cl, 1);
1374                                 break;
1375                         case 0x53:      /* HYST */
1376                                 res = swab16(i2c_smbus_read_word_data(cl, 2));
1377                                 break;
1378                         case 0x55:      /* OVER */
1379                         default:
1380                                 res = swab16(i2c_smbus_read_word_data(cl, 3));
1381                                 break;
1382                         }
1383                 }
1384                 if (bank > 2)
1385                         i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1386         }
1387         up(&data->lock);
1388         return res;
1389 }
1390
1391 static int
1392 w83781d_write_value(struct i2c_client *client, u16 reg, u16 value)
1393 {
1394         struct w83781d_data *data = i2c_get_clientdata(client);
1395         int word_sized, bank;
1396         struct i2c_client *cl;
1397
1398         down(&data->lock);
1399         if (i2c_is_isa_client(client)) {
1400                 word_sized = (((reg & 0xff00) == 0x100)
1401                               || ((reg & 0xff00) == 0x200))
1402                     && (((reg & 0x00ff) == 0x53)
1403                         || ((reg & 0x00ff) == 0x55));
1404                 if (reg & 0xff00) {
1405                         outb_p(W83781D_REG_BANK,
1406                                client->addr + W83781D_ADDR_REG_OFFSET);
1407                         outb_p(reg >> 8,
1408                                client->addr + W83781D_DATA_REG_OFFSET);
1409                 }
1410                 outb_p(reg & 0xff, client->addr + W83781D_ADDR_REG_OFFSET);
1411                 if (word_sized) {
1412                         outb_p(value >> 8,
1413                                client->addr + W83781D_DATA_REG_OFFSET);
1414                         outb_p((reg & 0xff) + 1,
1415                                client->addr + W83781D_ADDR_REG_OFFSET);
1416                 }
1417                 outb_p(value & 0xff, client->addr + W83781D_DATA_REG_OFFSET);
1418                 if (reg & 0xff00) {
1419                         outb_p(W83781D_REG_BANK,
1420                                client->addr + W83781D_ADDR_REG_OFFSET);
1421                         outb_p(0, client->addr + W83781D_DATA_REG_OFFSET);
1422                 }
1423         } else {
1424                 bank = (reg >> 8) & 0x0f;
1425                 if (bank > 2)
1426                         /* switch banks */
1427                         i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1428                                                   bank);
1429                 if (bank == 0 || bank > 2) {
1430                         i2c_smbus_write_byte_data(client, reg & 0xff,
1431                                                   value & 0xff);
1432                 } else {
1433                         /* switch to subclient */
1434                         cl = data->lm75[bank - 1];
1435                         /* convert from ISA to LM75 I2C addresses */
1436                         switch (reg & 0xff) {
1437                         case 0x52:      /* CONFIG */
1438                                 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
1439                                 break;
1440                         case 0x53:      /* HYST */
1441                                 i2c_smbus_write_word_data(cl, 2, swab16(value));
1442                                 break;
1443                         case 0x55:      /* OVER */
1444                                 i2c_smbus_write_word_data(cl, 3, swab16(value));
1445                                 break;
1446                         }
1447                 }
1448                 if (bank > 2)
1449                         i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1450         }
1451         up(&data->lock);
1452         return 0;
1453 }
1454
1455 /* Called when we have found a new W83781D. It should set limits, etc. */
1456 static void
1457 w83781d_init_client(struct i2c_client *client)
1458 {
1459         struct w83781d_data *data = i2c_get_clientdata(client);
1460         int i, p;
1461         int type = data->type;
1462         u8 tmp;
1463
1464         if (init && type != as99127f) { /* this resets registers we don't have
1465                                            documentation for on the as99127f */
1466                 /* save these registers */
1467                 i = w83781d_read_value(client, W83781D_REG_BEEP_CONFIG);
1468                 p = w83781d_read_value(client, W83781D_REG_PWMCLK12);
1469                 /* Reset all except Watchdog values and last conversion values
1470                    This sets fan-divs to 2, among others */
1471                 w83781d_write_value(client, W83781D_REG_CONFIG, 0x80);
1472                 /* Restore the registers and disable power-on abnormal beep.
1473                    This saves FAN 1/2/3 input/output values set by BIOS. */
1474                 w83781d_write_value(client, W83781D_REG_BEEP_CONFIG, i | 0x80);
1475                 w83781d_write_value(client, W83781D_REG_PWMCLK12, p);
1476                 /* Disable master beep-enable (reset turns it on).
1477                    Individual beep_mask should be reset to off but for some reason
1478                    disabling this bit helps some people not get beeped */
1479                 w83781d_write_value(client, W83781D_REG_BEEP_INTS2, 0);
1480         }
1481
1482         data->vrm = i2c_which_vrm();
1483
1484         if ((type != w83781d) && (type != as99127f)) {
1485                 tmp = w83781d_read_value(client, 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                                     (client,
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(client, W83781D_REG_TEMP2_CONFIG);
1505                 if (tmp & 0x01) {
1506                         dev_warn(&client->dev, "Enabling temp2, readings "
1507                                  "might not make sense\n");
1508                         w83781d_write_value(client, W83781D_REG_TEMP2_CONFIG,
1509                                 tmp & 0xfe);
1510                 }
1511
1512                 /* Enable temp3 */
1513                 if (type != w83783s) {
1514                         tmp = w83781d_read_value(client,
1515                                 W83781D_REG_TEMP3_CONFIG);
1516                         if (tmp & 0x01) {
1517                                 dev_warn(&client->dev, "Enabling temp3, "
1518                                          "readings might not make sense\n");
1519                                 w83781d_write_value(client,
1520                                         W83781D_REG_TEMP3_CONFIG, tmp & 0xfe);
1521                         }
1522                 }
1523
1524                 if (type != w83781d) {
1525                         /* enable comparator mode for temp2 and temp3 so
1526                            alarm indication will work correctly */
1527                         i = w83781d_read_value(client, W83781D_REG_IRQ);
1528                         if (!(i & 0x40))
1529                                 w83781d_write_value(client, W83781D_REG_IRQ,
1530                                                     i | 0x40);
1531                 }
1532         }
1533
1534         /* Start monitoring */
1535         w83781d_write_value(client, W83781D_REG_CONFIG,
1536                             (w83781d_read_value(client,
1537                                                 W83781D_REG_CONFIG) & 0xf7)
1538                             | 0x01);
1539 }
1540
1541 static struct w83781d_data *w83781d_update_device(struct device *dev)
1542 {
1543         struct i2c_client *client = to_i2c_client(dev);
1544         struct w83781d_data *data = i2c_get_clientdata(client);
1545         int i;
1546
1547         down(&data->update_lock);
1548
1549         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1550             || !data->valid) {
1551                 dev_dbg(dev, "Starting device update\n");
1552
1553                 for (i = 0; i <= 8; i++) {
1554                         if (data->type == w83783s && i == 1)
1555                                 continue;       /* 783S has no in1 */
1556                         data->in[i] =
1557                             w83781d_read_value(client, W83781D_REG_IN(i));
1558                         data->in_min[i] =
1559                             w83781d_read_value(client, W83781D_REG_IN_MIN(i));
1560                         data->in_max[i] =
1561                             w83781d_read_value(client, W83781D_REG_IN_MAX(i));
1562                         if ((data->type != w83782d)
1563                             && (data->type != w83627hf) && (i == 6))
1564                                 break;
1565                 }
1566                 for (i = 1; i <= 3; i++) {
1567                         data->fan[i - 1] =
1568                             w83781d_read_value(client, W83781D_REG_FAN(i));
1569                         data->fan_min[i - 1] =
1570                             w83781d_read_value(client, W83781D_REG_FAN_MIN(i));
1571                 }
1572                 if (data->type != w83781d && data->type != as99127f) {
1573                         for (i = 1; i <= 4; i++) {
1574                                 data->pwm[i - 1] =
1575                                     w83781d_read_value(client,
1576                                                        W83781D_REG_PWM(i));
1577                                 if ((data->type != w83782d
1578                                      || i2c_is_isa_client(client))
1579                                     && i == 2)
1580                                         break;
1581                         }
1582                         /* Only PWM2 can be disabled */
1583                         data->pwmenable[1] = (w83781d_read_value(client,
1584                                               W83781D_REG_PWMCLK12) & 0x08) >> 3;
1585                 }
1586
1587                 data->temp = w83781d_read_value(client, W83781D_REG_TEMP(1));
1588                 data->temp_max =
1589                     w83781d_read_value(client, W83781D_REG_TEMP_OVER(1));
1590                 data->temp_max_hyst =
1591                     w83781d_read_value(client, W83781D_REG_TEMP_HYST(1));
1592                 data->temp_add[0] =
1593                     w83781d_read_value(client, W83781D_REG_TEMP(2));
1594                 data->temp_max_add[0] =
1595                     w83781d_read_value(client, W83781D_REG_TEMP_OVER(2));
1596                 data->temp_max_hyst_add[0] =
1597                     w83781d_read_value(client, W83781D_REG_TEMP_HYST(2));
1598                 if (data->type != w83783s) {
1599                         data->temp_add[1] =
1600                             w83781d_read_value(client, W83781D_REG_TEMP(3));
1601                         data->temp_max_add[1] =
1602                             w83781d_read_value(client,
1603                                                W83781D_REG_TEMP_OVER(3));
1604                         data->temp_max_hyst_add[1] =
1605                             w83781d_read_value(client,
1606                                                W83781D_REG_TEMP_HYST(3));
1607                 }
1608                 i = w83781d_read_value(client, W83781D_REG_VID_FANDIV);
1609                 data->vid = i & 0x0f;
1610                 data->vid |= (w83781d_read_value(client,
1611                                         W83781D_REG_CHIPID) & 0x01) << 4;
1612                 data->fan_div[0] = (i >> 4) & 0x03;
1613                 data->fan_div[1] = (i >> 6) & 0x03;
1614                 data->fan_div[2] = (w83781d_read_value(client,
1615                                         W83781D_REG_PIN) >> 6) & 0x03;
1616                 if ((data->type != w83781d) && (data->type != as99127f)) {
1617                         i = w83781d_read_value(client, W83781D_REG_VBAT);
1618                         data->fan_div[0] |= (i >> 3) & 0x04;
1619                         data->fan_div[1] |= (i >> 4) & 0x04;
1620                         data->fan_div[2] |= (i >> 5) & 0x04;
1621                 }
1622                 data->alarms =
1623                     w83781d_read_value(client,
1624                                        W83781D_REG_ALARM1) +
1625                     (w83781d_read_value(client, W83781D_REG_ALARM2) << 8);
1626                 if ((data->type == w83782d) || (data->type == w83627hf)) {
1627                         data->alarms |=
1628                             w83781d_read_value(client,
1629                                                W83781D_REG_ALARM3) << 16;
1630                 }
1631                 i = w83781d_read_value(client, W83781D_REG_BEEP_INTS2);
1632                 data->beep_enable = i >> 7;
1633                 data->beep_mask = ((i & 0x7f) << 8) +
1634                     w83781d_read_value(client, W83781D_REG_BEEP_INTS1);
1635                 if ((data->type != w83781d) && (data->type != as99127f)) {
1636                         data->beep_mask |=
1637                             w83781d_read_value(client,
1638                                                W83781D_REG_BEEP_INTS3) << 16;
1639                 }
1640                 data->last_updated = jiffies;
1641                 data->valid = 1;
1642         }
1643
1644         up(&data->update_lock);
1645
1646         return data;
1647 }
1648
1649 static int __init
1650 sensors_w83781d_init(void)
1651 {
1652         int res;
1653
1654         res = i2c_add_driver(&w83781d_driver);
1655         if (res)
1656                 return res;
1657
1658         res = i2c_isa_add_driver(&w83781d_isa_driver);
1659         if (res) {
1660                 i2c_del_driver(&w83781d_driver);
1661                 return res;
1662         }
1663
1664         return 0;
1665 }
1666
1667 static void __exit
1668 sensors_w83781d_exit(void)
1669 {
1670         i2c_isa_del_driver(&w83781d_isa_driver);
1671         i2c_del_driver(&w83781d_driver);
1672 }
1673
1674 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
1675               "Philip Edelbrock <phil@netroedge.com>, "
1676               "and Mark Studebaker <mdsxyz123@yahoo.com>");
1677 MODULE_DESCRIPTION("W83781D driver");
1678 MODULE_LICENSE("GPL");
1679
1680 module_init(sensors_w83781d_init);
1681 module_exit(sensors_w83781d_exit);