git.oblomov.eu Git - linux-2.6/blob - 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
   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/hwmon.h>
  43 #include <linux/hwmon-vid.h>
  44 #include <linux/err.h>
  45 #include <asm/io.h>
  46 #include "lm75.h"
  47
  48 /* Addresses to scan */
  49 static unsigned short normal_i2c[] = { 0x20, 0x21, 0x22, 0x23, 0x24, 0x25,
  50                                         0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
  51                                         0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END };
  52 static unsigned short isa_address = 0x290;
  53
  54 /* Insmod parameters */
  55 I2C_CLIENT_INSMOD_5(w83781d, w83782d, w83783s, w83627hf, as99127f);
  56 I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
  57                     "{bus, clientaddr, subclientaddr1, subclientaddr2}");
  58
  59 static int init = 1;
  60 module_param(init, bool, 0);
  61 MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization");
  62
  63 /* Constants specified below */
  64
  65 /* Length of ISA address segment */
  66 #define W83781D_EXTENT                  8
  67
  68 /* Where are the ISA address/data registers relative to the base address */
  69 #define W83781D_ADDR_REG_OFFSET         5
  70 #define W83781D_DATA_REG_OFFSET         6
  71
  72 /* The W83781D registers */
  73 /* The W83782D registers for nr=7,8 are in bank 5 */
  74 #define W83781D_REG_IN_MAX(nr)          ((nr < 7) ? (0x2b + (nr) * 2) : \
  75                                                     (0x554 + (((nr) - 7) * 2)))
  76 #define W83781D_REG_IN_MIN(nr)          ((nr < 7) ? (0x2c + (nr) * 2) : \
  77                                                     (0x555 + (((nr) - 7) * 2)))
  78 #define W83781D_REG_IN(nr)              ((nr < 7) ? (0x20 + (nr)) : \
  79                                                     (0x550 + (nr) - 7))
  80
  81 #define W83781D_REG_FAN_MIN(nr)         (0x3a + (nr))
  82 #define W83781D_REG_FAN(nr)             (0x27 + (nr))
  83
  84 #define W83781D_REG_BANK                0x4E
  85 #define W83781D_REG_TEMP2_CONFIG        0x152
  86 #define W83781D_REG_TEMP3_CONFIG        0x252
  87 #define W83781D_REG_TEMP(nr)            ((nr == 3) ? (0x0250) : \
  88                                         ((nr == 2) ? (0x0150) : \
  89                                                      (0x27)))
  90 #define W83781D_REG_TEMP_HYST(nr)       ((nr == 3) ? (0x253) : \
  91                                         ((nr == 2) ? (0x153) : \
  92                                                      (0x3A)))
  93 #define W83781D_REG_TEMP_OVER(nr)       ((nr == 3) ? (0x255) : \
  94                                         ((nr == 2) ? (0x155) : \
  95                                                      (0x39)))
  96
  97 #define W83781D_REG_CONFIG              0x40
  98 #define W83781D_REG_ALARM1              0x41
  99 #define W83781D_REG_ALARM2              0x42
 100 #define W83781D_REG_ALARM3              0x450   /* not on W83781D */
 101
 102 #define W83781D_REG_IRQ                 0x4C
 103 #define W83781D_REG_BEEP_CONFIG         0x4D
 104 #define W83781D_REG_BEEP_INTS1          0x56
 105 #define W83781D_REG_BEEP_INTS2          0x57
 106 #define W83781D_REG_BEEP_INTS3          0x453   /* not on W83781D */
 107
 108 #define W83781D_REG_VID_FANDIV          0x47
 109
 110 #define W83781D_REG_CHIPID              0x49
 111 #define W83781D_REG_WCHIPID             0x58
 112 #define W83781D_REG_CHIPMAN             0x4F
 113 #define W83781D_REG_PIN                 0x4B
 114
 115 /* 782D/783S only */
 116 #define W83781D_REG_VBAT                0x5D
 117
 118 /* PWM 782D (1-4) and 783S (1-2) only */
 119 #define W83781D_REG_PWM1                0x5B    /* 782d and 783s/627hf datasheets disagree */
 120                                                 /* on which is which; */
 121 #define W83781D_REG_PWM2                0x5A    /* We follow the 782d convention here, */
 122                                                 /* However 782d is probably wrong. */
 123 #define W83781D_REG_PWM3                0x5E
 124 #define W83781D_REG_PWM4                0x5F
 125 #define W83781D_REG_PWMCLK12            0x5C
 126 #define W83781D_REG_PWMCLK34            0x45C
 127 static const u8 regpwm[] = { W83781D_REG_PWM1, W83781D_REG_PWM2,
 128         W83781D_REG_PWM3, W83781D_REG_PWM4
 129 };
 130
 131 #define W83781D_REG_PWM(nr)             (regpwm[(nr) - 1])
 132
 133 #define W83781D_REG_I2C_ADDR            0x48
 134 #define W83781D_REG_I2C_SUBADDR         0x4A
 135
 136 /* The following are undocumented in the data sheets however we
 137    received the information in an email from Winbond tech support */
 138 /* Sensor selection - not on 781d */
 139 #define W83781D_REG_SCFG1               0x5D
 140 static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 };
 141
 142 #define W83781D_REG_SCFG2               0x59
 143 static const u8 BIT_SCFG2[] = { 0x10, 0x20, 0x40 };
 144
 145 #define W83781D_DEFAULT_BETA            3435
 146
 147 /* RT Table registers */
 148 #define W83781D_REG_RT_IDX              0x50
 149 #define W83781D_REG_RT_VAL              0x51
 150
 151 /* Conversions. Rounding and limit checking is only done on the TO_REG
 152    variants. Note that you should be a bit careful with which arguments
 153    these macros are called: arguments may be evaluated more than once.
 154    Fixing this is just not worth it. */
 155 #define IN_TO_REG(val)                  (SENSORS_LIMIT((((val) * 10 + 8)/16),0,255))
 156 #define IN_FROM_REG(val)                (((val) * 16) / 10)
 157
 158 static inline u8
 159 FAN_TO_REG(long rpm, int div)
 160 {
 161         if (rpm == 0)
 162                 return 255;
 163         rpm = SENSORS_LIMIT(rpm, 1, 1000000);
 164         return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
 165 }
 166
 167 #define FAN_FROM_REG(val,div)           ((val) == 0   ? -1 : \
 168                                         ((val) == 255 ? 0 : \
 169                                                         1350000 / ((val) * (div))))
 170
 171 #define TEMP_TO_REG(val)                (SENSORS_LIMIT(((val) < 0 ? (val)+0x100*1000 \
 172                                                 : (val)) / 1000, 0, 0xff))
 173 #define TEMP_FROM_REG(val)              (((val) & 0x80 ? (val)-0x100 : (val)) * 1000)
 174
 175 #define PWM_FROM_REG(val)               (val)
 176 #define PWM_TO_REG(val)                 (SENSORS_LIMIT((val),0,255))
 177 #define BEEP_MASK_FROM_REG(val,type)    ((type) == as99127f ? \
 178                                          (val) ^ 0x7fff : (val))
 179 #define BEEP_MASK_TO_REG(val,type)      ((type) == as99127f ? \
 180                                          (~(val)) & 0x7fff : (val) & 0xffffff)
 181
 182 #define BEEP_ENABLE_TO_REG(val)         ((val) ? 1 : 0)
 183 #define BEEP_ENABLE_FROM_REG(val)       ((val) ? 1 : 0)
 184
 185 #define DIV_FROM_REG(val)               (1 << (val))
 186
 187 static inline u8
 188 DIV_TO_REG(long val, enum chips type)
 189 {
 190         int i;
 191         val = SENSORS_LIMIT(val, 1,
 192                             ((type == w83781d
 193                               || type == as99127f) ? 8 : 128)) >> 1;
 194         for (i = 0; i < 7; i++) {
 195                 if (val == 0)
 196                         break;
 197                 val >>= 1;
 198         }
 199         return ((u8) i);
 200 }
 201
 202 /* There are some complications in a module like this. First off, W83781D chips
 203    may be both present on the SMBus and the ISA bus, and we have to handle
 204    those cases separately at some places. Second, there might be several
 205    W83781D chips available (well, actually, that is probably never done; but
 206    it is a clean illustration of how to handle a case like that). Finally,
 207    a specific chip may be attached to *both* ISA and SMBus, and we would
 208    not like to detect it double. Fortunately, in the case of the W83781D at
 209    least, a register tells us what SMBus address we are on, so that helps
 210    a bit - except if there could be more than one SMBus. Groan. No solution
 211    for this yet. */
 212
 213 /* This module may seem overly long and complicated. In fact, it is not so
 214    bad. Quite a lot of bookkeeping is done. A real driver can often cut
 215    some corners. */
 216
 217 /* For each registered W83781D, we need to keep some data in memory. That
 218    data is pointed to by w83781d_list[NR]->data. The structure itself is
 219    dynamically allocated, at the same time when a new w83781d client is
 220    allocated. */
 221 struct w83781d_data {
 222         struct i2c_client client;
 223         struct class_device *class_dev;
 224         struct semaphore lock;
 225         enum chips type;
 226
 227         struct semaphore update_lock;
 228         char valid;             /* !=0 if following fields are valid */
 229         unsigned long last_updated;     /* In jiffies */
 230
 231         struct i2c_client *lm75[2];     /* for secondary I2C addresses */
 232         /* array of 2 pointers to subclients */
 233
 234         u8 in[9];               /* Register value - 8 & 9 for 782D only */
 235         u8 in_max[9];           /* Register value - 8 & 9 for 782D only */
 236         u8 in_min[9];           /* Register value - 8 & 9 for 782D only */
 237         u8 fan[3];              /* Register value */
 238         u8 fan_min[3];          /* Register value */
 239         u8 temp;
 240         u8 temp_max;            /* Register value */
 241         u8 temp_max_hyst;       /* Register value */
 242         u16 temp_add[2];        /* Register value */
 243         u16 temp_max_add[2];    /* Register value */
 244         u16 temp_max_hyst_add[2];       /* Register value */
 245         u8 fan_div[3];          /* Register encoding, shifted right */
 246         u8 vid;                 /* Register encoding, combined */
 247         u32 alarms;             /* Register encoding, combined */
 248         u32 beep_mask;          /* Register encoding, combined */
 249         u8 beep_enable;         /* Boolean */
 250         u8 pwm[4];              /* Register value */
 251         u8 pwmenable[4];        /* Boolean */
 252         u16 sens[3];            /* 782D/783S only.
 253                                    1 = pentium diode; 2 = 3904 diode;
 254                                    3000-5000 = thermistor beta.
 255                                    Default = 3435.
 256                                    Other Betas unimplemented */
 257         u8 vrm;
 258 };
 259
 260 static int w83781d_attach_adapter(struct i2c_adapter *adapter);
 261 static int w83781d_isa_attach_adapter(struct i2c_adapter *adapter);
 262 static int w83781d_detect(struct i2c_adapter *adapter, int address, int kind);
 263 static int w83781d_detach_client(struct i2c_client *client);
 264
 265 static int w83781d_read_value(struct i2c_client *client, u16 register);
 266 static int w83781d_write_value(struct i2c_client *client, u16 register,
 267                                u16 value);
 268 static struct w83781d_data *w83781d_update_device(struct device *dev);
 269 static void w83781d_init_client(struct i2c_client *client);
 270
 271 static struct i2c_driver w83781d_driver = {
 272         .driver = {
 273                 .name = "w83781d",
 274         },
 275         .id = I2C_DRIVERID_W83781D,
 276         .attach_adapter = w83781d_attach_adapter,
 277         .detach_client = w83781d_detach_client,
 278 };
 279
 280 static struct i2c_driver w83781d_isa_driver = {
 281         .driver = {
 282                 .name = "w83781d-isa",
 283         },
 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] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 894         if (!(data->lm75[0])) {
 895                 err = -ENOMEM;
 896                 goto ERROR_SC_0;
 897         }
 898
 899         id = i2c_adapter_id(adapter);
 900
 901         if (force_subclients[0] == id && force_subclients[1] == address) {
 902                 for (i = 2; i <= 3; i++) {
 903                         if (force_subclients[i] < 0x48 ||
 904                             force_subclients[i] > 0x4f) {
 905                                 dev_err(&new_client->dev, "Invalid subclient "
 906                                         "address %d; must be 0x48-0x4f\n",
 907                                         force_subclients[i]);
 908                                 err = -EINVAL;
 909                                 goto ERROR_SC_1;
 910                         }
 911                 }
 912                 w83781d_write_value(new_client, W83781D_REG_I2C_SUBADDR,
 913                                 (force_subclients[2] & 0x07) |
 914                                 ((force_subclients[3] & 0x07) << 4));
 915                 data->lm75[0]->addr = force_subclients[2];
 916         } else {
 917                 val1 = w83781d_read_value(new_client, W83781D_REG_I2C_SUBADDR);
 918                 data->lm75[0]->addr = 0x48 + (val1 & 0x07);
 919         }
 920
 921         if (kind != w83783s) {
 922                 data->lm75[1] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 923                 if (!(data->lm75[1])) {
 924                         err = -ENOMEM;
 925                         goto ERROR_SC_1;
 926                 }
 927
 928                 if (force_subclients[0] == id &&
 929                     force_subclients[1] == address) {
 930                         data->lm75[1]->addr = force_subclients[3];
 931                 } else {
 932                         data->lm75[1]->addr = 0x48 + ((val1 >> 4) & 0x07);
 933                 }
 934                 if (data->lm75[0]->addr == data->lm75[1]->addr) {
 935                         dev_err(&new_client->dev,
 936                                "Duplicate addresses 0x%x for subclients.\n",
 937                                data->lm75[0]->addr);
 938                         err = -EBUSY;
 939                         goto ERROR_SC_2;
 940                 }
 941         }
 942
 943         if (kind == w83781d)
 944                 client_name = "w83781d subclient";
 945         else if (kind == w83782d)
 946                 client_name = "w83782d subclient";
 947         else if (kind == w83783s)
 948                 client_name = "w83783s subclient";
 949         else if (kind == w83627hf)
 950                 client_name = "w83627hf subclient";
 951         else if (kind == as99127f)
 952                 client_name = "as99127f subclient";
 953
 954         for (i = 0; i <= 1; i++) {
 955                 /* store all data in w83781d */
 956                 i2c_set_clientdata(data->lm75[i], NULL);
 957                 data->lm75[i]->adapter = adapter;
 958                 data->lm75[i]->driver = &w83781d_driver;
 959                 data->lm75[i]->flags = 0;
 960                 strlcpy(data->lm75[i]->name, client_name,
 961                         I2C_NAME_SIZE);
 962                 if ((err = i2c_attach_client(data->lm75[i]))) {
 963                         dev_err(&new_client->dev, "Subclient %d "
 964                                 "registration at address 0x%x "
 965                                 "failed.\n", i, data->lm75[i]->addr);
 966                         if (i == 1)
 967                                 goto ERROR_SC_3;
 968                         goto ERROR_SC_2;
 969                 }
 970                 if (kind == w83783s)
 971                         break;
 972         }
 973
 974         return 0;
 975
 976 /* Undo inits in case of errors */
 977 ERROR_SC_3:
 978         i2c_detach_client(data->lm75[0]);
 979 ERROR_SC_2:
 980         kfree(data->lm75[1]);
 981 ERROR_SC_1:
 982         kfree(data->lm75[0]);
 983 ERROR_SC_0:
 984         return err;
 985 }
 986
 987 static int
 988 w83781d_detect(struct i2c_adapter *adapter, int address, int kind)
 989 {
 990         int i = 0, val1 = 0, val2;
 991         struct i2c_client *new_client;
 992         struct w83781d_data *data;
 993         int err;
 994         const char *client_name = "";
 995         int is_isa = i2c_is_isa_adapter(adapter);
 996         enum vendor { winbond, asus } vendid;
 997
 998         if (!is_isa
 999             && !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1000                 err = -EINVAL;
1001                 goto ERROR0;
1002         }
1003
1004         /* Prevent users from forcing a kind for a bus it isn't supposed
1005            to possibly be on */
1006         if (is_isa && (kind == as99127f || kind == w83783s)) {
1007                 dev_err(&adapter->dev,
1008                         "Cannot force I2C-only chip for ISA address 0x%02x.\n",
1009                         address);
1010                 err = -EINVAL;
1011                 goto ERROR0;
1012         }
1013
1014         if (is_isa)
1015                 if (!request_region(address, W83781D_EXTENT,
1016                                     w83781d_isa_driver.driver.name)) {
1017                         dev_dbg(&adapter->dev, "Request of region "
1018                                 "0x%x-0x%x for w83781d failed\n", address,
1019                                 address + W83781D_EXTENT - 1);
1020                         err = -EBUSY;
1021                         goto ERROR0;
1022                 }
1023
1024         /* Probe whether there is anything available on this address. Already
1025            done for SMBus clients */
1026         if (kind < 0) {
1027                 if (is_isa) {
1028
1029 #define REALLY_SLOW_IO
1030                         /* We need the timeouts for at least some LM78-like
1031                            chips. But only if we read 'undefined' registers. */
1032                         i = inb_p(address + 1);
1033                         if (inb_p(address + 2) != i
1034                          || inb_p(address + 3) != i
1035                          || inb_p(address + 7) != i) {
1036                                 dev_dbg(&adapter->dev, "Detection of w83781d "
1037                                         "chip failed at step 1\n");
1038                                 err = -ENODEV;
1039                                 goto ERROR1;
1040                         }
1041 #undef REALLY_SLOW_IO
1042
1043                         /* Let's just hope nothing breaks here */
1044                         i = inb_p(address + 5) & 0x7f;
1045                         outb_p(~i & 0x7f, address + 5);
1046                         val2 = inb_p(address + 5) & 0x7f;
1047                         if (val2 != (~i & 0x7f)) {
1048                                 outb_p(i, address + 5);
1049                                 dev_dbg(&adapter->dev, "Detection of w83781d "
1050                                         "chip failed at step 2 (0x%x != "
1051                                         "0x%x at 0x%x)\n", val2, ~i & 0x7f,
1052                                         address + 5);
1053                                 err = -ENODEV;
1054                                 goto ERROR1;
1055                         }
1056                 }
1057         }
1058
1059         /* OK. For now, we presume we have a valid client. We now create the
1060            client structure, even though we cannot fill it completely yet.
1061            But it allows us to access w83781d_{read,write}_value. */
1062
1063         if (!(data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL))) {
1064                 err = -ENOMEM;
1065                 goto ERROR1;
1066         }
1067
1068         new_client = &data->client;
1069         i2c_set_clientdata(new_client, data);
1070         new_client->addr = address;
1071         init_MUTEX(&data->lock);
1072         new_client->adapter = adapter;
1073         new_client->driver = is_isa ? &w83781d_isa_driver : &w83781d_driver;
1074         new_client->flags = 0;
1075
1076         /* Now, we do the remaining detection. */
1077
1078         /* The w8378?d may be stuck in some other bank than bank 0. This may
1079            make reading other information impossible. Specify a force=... or
1080            force_*=... parameter, and the Winbond will be reset to the right
1081            bank. */
1082         if (kind < 0) {
1083                 if (w83781d_read_value(new_client, W83781D_REG_CONFIG) & 0x80) {
1084                         dev_dbg(&new_client->dev, "Detection failed at step "
1085                                 "3\n");
1086                         err = -ENODEV;
1087                         goto ERROR2;
1088                 }
1089                 val1 = w83781d_read_value(new_client, W83781D_REG_BANK);
1090                 val2 = w83781d_read_value(new_client, W83781D_REG_CHIPMAN);
1091                 /* Check for Winbond or Asus ID if in bank 0 */
1092                 if ((!(val1 & 0x07)) &&
1093                     (((!(val1 & 0x80)) && (val2 != 0xa3) && (val2 != 0xc3))
1094                      || ((val1 & 0x80) && (val2 != 0x5c) && (val2 != 0x12)))) {
1095                         dev_dbg(&new_client->dev, "Detection failed at step "
1096                                 "4\n");
1097                         err = -ENODEV;
1098                         goto ERROR2;
1099                 }
1100                 /* If Winbond SMBus, check address at 0x48.
1101                    Asus doesn't support, except for as99127f rev.2 */
1102                 if ((!is_isa) && (((!(val1 & 0x80)) && (val2 == 0xa3)) ||
1103                                   ((val1 & 0x80) && (val2 == 0x5c)))) {
1104                         if (w83781d_read_value
1105                             (new_client, W83781D_REG_I2C_ADDR) != address) {
1106                                 dev_dbg(&new_client->dev, "Detection failed "
1107                                         "at step 5\n");
1108                                 err = -ENODEV;
1109                                 goto ERROR2;
1110                         }
1111                 }
1112         }
1113
1114         /* We have either had a force parameter, or we have already detected the
1115            Winbond. Put it now into bank 0 and Vendor ID High Byte */
1116         w83781d_write_value(new_client, W83781D_REG_BANK,
1117                             (w83781d_read_value(new_client,
1118                                                 W83781D_REG_BANK) & 0x78) |
1119                             0x80);
1120
1121         /* Determine the chip type. */
1122         if (kind <= 0) {
1123                 /* get vendor ID */
1124                 val2 = w83781d_read_value(new_client, W83781D_REG_CHIPMAN);
1125                 if (val2 == 0x5c)
1126                         vendid = winbond;
1127                 else if (val2 == 0x12)
1128                         vendid = asus;
1129                 else {
1130                         dev_dbg(&new_client->dev, "Chip was made by neither "
1131                                 "Winbond nor Asus?\n");
1132                         err = -ENODEV;
1133                         goto ERROR2;
1134                 }
1135
1136                 val1 = w83781d_read_value(new_client, W83781D_REG_WCHIPID);
1137                 if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond)
1138                         kind = w83781d;
1139                 else if (val1 == 0x30 && vendid == winbond)
1140                         kind = w83782d;
1141                 else if (val1 == 0x40 && vendid == winbond && !is_isa
1142                                 && address == 0x2d)
1143                         kind = w83783s;
1144                 else if (val1 == 0x21 && vendid == winbond)
1145                         kind = w83627hf;
1146                 else if (val1 == 0x31 && !is_isa && address >= 0x28)
1147                         kind = as99127f;
1148                 else {
1149                         if (kind == 0)
1150                                 dev_warn(&new_client->dev, "Ignoring 'force' "
1151                                          "parameter for unknown chip at "
1152                                          "adapter %d, address 0x%02x\n",
1153                                          i2c_adapter_id(adapter), address);
1154                         err = -EINVAL;
1155                         goto ERROR2;
1156                 }
1157         }
1158
1159         if (kind == w83781d) {
1160                 client_name = "w83781d";
1161         } else if (kind == w83782d) {
1162                 client_name = "w83782d";
1163         } else if (kind == w83783s) {
1164                 client_name = "w83783s";
1165         } else if (kind == w83627hf) {
1166                 client_name = "w83627hf";
1167         } else if (kind == as99127f) {
1168                 client_name = "as99127f";
1169         }
1170
1171         /* Fill in the remaining client fields and put into the global list */
1172         strlcpy(new_client->name, client_name, I2C_NAME_SIZE);
1173         data->type = kind;
1174
1175         data->valid = 0;
1176         init_MUTEX(&data->update_lock);
1177
1178         /* Tell the I2C layer a new client has arrived */
1179         if ((err = i2c_attach_client(new_client)))
1180                 goto ERROR2;
1181
1182         /* attach secondary i2c lm75-like clients */
1183         if (!is_isa) {
1184                 if ((err = w83781d_detect_subclients(adapter, address,
1185                                 kind, new_client)))
1186                         goto ERROR3;
1187         } else {
1188                 data->lm75[0] = NULL;
1189                 data->lm75[1] = NULL;
1190         }
1191
1192         /* Initialize the chip */
1193         w83781d_init_client(new_client);
1194
1195         /* A few vars need to be filled upon startup */
1196         for (i = 1; i <= 3; i++) {
1197                 data->fan_min[i - 1] = w83781d_read_value(new_client,
1198                                         W83781D_REG_FAN_MIN(i));
1199         }
1200         if (kind != w83781d && kind != as99127f)
1201                 for (i = 0; i < 4; i++)
1202                         data->pwmenable[i] = 1;
1203
1204         /* Register sysfs hooks */
1205         data->class_dev = hwmon_device_register(&new_client->dev);
1206         if (IS_ERR(data->class_dev)) {
1207                 err = PTR_ERR(data->class_dev);
1208                 goto ERROR4;
1209         }
1210
1211         device_create_file_in(new_client, 0);
1212         if (kind != w83783s)
1213                 device_create_file_in(new_client, 1);
1214         device_create_file_in(new_client, 2);
1215         device_create_file_in(new_client, 3);
1216         device_create_file_in(new_client, 4);
1217         device_create_file_in(new_client, 5);
1218         device_create_file_in(new_client, 6);
1219         if (kind != as99127f && kind != w83781d && kind != w83783s) {
1220                 device_create_file_in(new_client, 7);
1221                 device_create_file_in(new_client, 8);
1222         }
1223
1224         device_create_file_fan(new_client, 1);
1225         device_create_file_fan(new_client, 2);
1226         device_create_file_fan(new_client, 3);
1227
1228         device_create_file_temp(new_client, 1);
1229         device_create_file_temp(new_client, 2);
1230         if (kind != w83783s)
1231                 device_create_file_temp(new_client, 3);
1232
1233         device_create_file_vid(new_client);
1234         device_create_file_vrm(new_client);
1235
1236         device_create_file_fan_div(new_client, 1);
1237         device_create_file_fan_div(new_client, 2);
1238         device_create_file_fan_div(new_client, 3);
1239
1240         device_create_file_alarms(new_client);
1241
1242         device_create_file_beep(new_client);
1243
1244         if (kind != w83781d && kind != as99127f) {
1245                 device_create_file_pwm(new_client, 1);
1246                 device_create_file_pwm(new_client, 2);
1247                 device_create_file_pwmenable(new_client, 2);
1248         }
1249         if (kind == w83782d && !is_isa) {
1250                 device_create_file_pwm(new_client, 3);
1251                 device_create_file_pwm(new_client, 4);
1252         }
1253
1254         if (kind != as99127f && kind != w83781d) {
1255                 device_create_file_sensor(new_client, 1);
1256                 device_create_file_sensor(new_client, 2);
1257                 if (kind != w83783s)
1258                         device_create_file_sensor(new_client, 3);
1259         }
1260
1261         return 0;
1262
1263 ERROR4:
1264         if (data->lm75[1]) {
1265                 i2c_detach_client(data->lm75[1]);
1266                 kfree(data->lm75[1]);
1267         }
1268         if (data->lm75[0]) {
1269                 i2c_detach_client(data->lm75[0]);
1270                 kfree(data->lm75[0]);
1271         }
1272 ERROR3:
1273         i2c_detach_client(new_client);
1274 ERROR2:
1275         kfree(data);
1276 ERROR1:
1277         if (is_isa)
1278                 release_region(address, W83781D_EXTENT);
1279 ERROR0:
1280         return err;
1281 }
1282
1283 static int
1284 w83781d_detach_client(struct i2c_client *client)
1285 {
1286         struct w83781d_data *data = i2c_get_clientdata(client);
1287         int err;
1288
1289         /* main client */
1290         if (data)
1291                 hwmon_device_unregister(data->class_dev);
1292
1293         if (i2c_is_isa_client(client))
1294                 release_region(client->addr, W83781D_EXTENT);
1295
1296         if ((err = i2c_detach_client(client)))
1297                 return err;
1298
1299         /* main client */
1300         if (data)
1301                 kfree(data);
1302
1303         /* subclient */
1304         else
1305                 kfree(client);
1306
1307         return 0;
1308 }
1309
1310 /* The SMBus locks itself, usually, but nothing may access the Winbond between
1311    bank switches. ISA access must always be locked explicitly!
1312    We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks,
1313    would slow down the W83781D access and should not be necessary.
1314    There are some ugly typecasts here, but the good news is - they should
1315    nowhere else be necessary! */
1316 static int
1317 w83781d_read_value(struct i2c_client *client, u16 reg)
1318 {
1319         struct w83781d_data *data = i2c_get_clientdata(client);
1320         int res, word_sized, bank;
1321         struct i2c_client *cl;
1322
1323         down(&data->lock);
1324         if (i2c_is_isa_client(client)) {
1325                 word_sized = (((reg & 0xff00) == 0x100)
1326                               || ((reg & 0xff00) == 0x200))
1327                     && (((reg & 0x00ff) == 0x50)
1328                         || ((reg & 0x00ff) == 0x53)
1329                         || ((reg & 0x00ff) == 0x55));
1330                 if (reg & 0xff00) {
1331                         outb_p(W83781D_REG_BANK,
1332                                client->addr + W83781D_ADDR_REG_OFFSET);
1333                         outb_p(reg >> 8,
1334                                client->addr + W83781D_DATA_REG_OFFSET);
1335                 }
1336                 outb_p(reg & 0xff, client->addr + W83781D_ADDR_REG_OFFSET);
1337                 res = inb_p(client->addr + W83781D_DATA_REG_OFFSET);
1338                 if (word_sized) {
1339                         outb_p((reg & 0xff) + 1,
1340                                client->addr + W83781D_ADDR_REG_OFFSET);
1341                         res =
1342                             (res << 8) + inb_p(client->addr +
1343                                                W83781D_DATA_REG_OFFSET);
1344                 }
1345                 if (reg & 0xff00) {
1346                         outb_p(W83781D_REG_BANK,
1347                                client->addr + W83781D_ADDR_REG_OFFSET);
1348                         outb_p(0, client->addr + W83781D_DATA_REG_OFFSET);
1349                 }
1350         } else {
1351                 bank = (reg >> 8) & 0x0f;
1352                 if (bank > 2)
1353                         /* switch banks */
1354                         i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1355                                                   bank);
1356                 if (bank == 0 || bank > 2) {
1357                         res = i2c_smbus_read_byte_data(client, reg & 0xff);
1358                 } else {
1359                         /* switch to subclient */
1360                         cl = data->lm75[bank - 1];
1361                         /* convert from ISA to LM75 I2C addresses */
1362                         switch (reg & 0xff) {
1363                         case 0x50:      /* TEMP */
1364                                 res = swab16(i2c_smbus_read_word_data(cl, 0));
1365                                 break;
1366                         case 0x52:      /* CONFIG */
1367                                 res = i2c_smbus_read_byte_data(cl, 1);
1368                                 break;
1369                         case 0x53:      /* HYST */
1370                                 res = swab16(i2c_smbus_read_word_data(cl, 2));
1371                                 break;
1372                         case 0x55:      /* OVER */
1373                         default:
1374                                 res = swab16(i2c_smbus_read_word_data(cl, 3));
1375                                 break;
1376                         }
1377                 }
1378                 if (bank > 2)
1379                         i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1380         }
1381         up(&data->lock);
1382         return res;
1383 }
1384
1385 static int
1386 w83781d_write_value(struct i2c_client *client, u16 reg, u16 value)
1387 {
1388         struct w83781d_data *data = i2c_get_clientdata(client);
1389         int word_sized, bank;
1390         struct i2c_client *cl;
1391
1392         down(&data->lock);
1393         if (i2c_is_isa_client(client)) {
1394                 word_sized = (((reg & 0xff00) == 0x100)
1395                               || ((reg & 0xff00) == 0x200))
1396                     && (((reg & 0x00ff) == 0x53)
1397                         || ((reg & 0x00ff) == 0x55));
1398                 if (reg & 0xff00) {
1399                         outb_p(W83781D_REG_BANK,
1400                                client->addr + W83781D_ADDR_REG_OFFSET);
1401                         outb_p(reg >> 8,
1402                                client->addr + W83781D_DATA_REG_OFFSET);
1403                 }
1404                 outb_p(reg & 0xff, client->addr + W83781D_ADDR_REG_OFFSET);
1405                 if (word_sized) {
1406                         outb_p(value >> 8,
1407                                client->addr + W83781D_DATA_REG_OFFSET);
1408                         outb_p((reg & 0xff) + 1,
1409                                client->addr + W83781D_ADDR_REG_OFFSET);
1410                 }
1411                 outb_p(value & 0xff, client->addr + W83781D_DATA_REG_OFFSET);
1412                 if (reg & 0xff00) {
1413                         outb_p(W83781D_REG_BANK,
1414                                client->addr + W83781D_ADDR_REG_OFFSET);
1415                         outb_p(0, client->addr + W83781D_DATA_REG_OFFSET);
1416                 }
1417         } else {
1418                 bank = (reg >> 8) & 0x0f;
1419                 if (bank > 2)
1420                         /* switch banks */
1421                         i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1422                                                   bank);
1423                 if (bank == 0 || bank > 2) {
1424                         i2c_smbus_write_byte_data(client, reg & 0xff,
1425                                                   value & 0xff);
1426                 } else {
1427                         /* switch to subclient */
1428                         cl = data->lm75[bank - 1];
1429                         /* convert from ISA to LM75 I2C addresses */
1430                         switch (reg & 0xff) {
1431                         case 0x52:      /* CONFIG */
1432                                 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
1433                                 break;
1434                         case 0x53:      /* HYST */
1435                                 i2c_smbus_write_word_data(cl, 2, swab16(value));
1436                                 break;
1437                         case 0x55:      /* OVER */
1438                                 i2c_smbus_write_word_data(cl, 3, swab16(value));
1439                                 break;
1440                         }
1441                 }
1442                 if (bank > 2)
1443                         i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1444         }
1445         up(&data->lock);
1446         return 0;
1447 }
1448
1449 static void
1450 w83781d_init_client(struct i2c_client *client)
1451 {
1452         struct w83781d_data *data = i2c_get_clientdata(client);
1453         int i, p;
1454         int type = data->type;
1455         u8 tmp;
1456
1457         if (init && type != as99127f) { /* this resets registers we don't have
1458                                            documentation for on the as99127f */
1459                 /* save these registers */
1460                 i = w83781d_read_value(client, W83781D_REG_BEEP_CONFIG);
1461                 p = w83781d_read_value(client, W83781D_REG_PWMCLK12);
1462                 /* Reset all except Watchdog values and last conversion values
1463                    This sets fan-divs to 2, among others */
1464                 w83781d_write_value(client, W83781D_REG_CONFIG, 0x80);
1465                 /* Restore the registers and disable power-on abnormal beep.
1466                    This saves FAN 1/2/3 input/output values set by BIOS. */
1467                 w83781d_write_value(client, W83781D_REG_BEEP_CONFIG, i | 0x80);
1468                 w83781d_write_value(client, W83781D_REG_PWMCLK12, p);
1469                 /* Disable master beep-enable (reset turns it on).
1470                    Individual beep_mask should be reset to off but for some reason
1471                    disabling this bit helps some people not get beeped */
1472                 w83781d_write_value(client, W83781D_REG_BEEP_INTS2, 0);
1473         }
1474
1475         data->vrm = vid_which_vrm();
1476
1477         if ((type != w83781d) && (type != as99127f)) {
1478                 tmp = w83781d_read_value(client, W83781D_REG_SCFG1);
1479                 for (i = 1; i <= 3; i++) {
1480                         if (!(tmp & BIT_SCFG1[i - 1])) {
1481                                 data->sens[i - 1] = W83781D_DEFAULT_BETA;
1482                         } else {
1483                                 if (w83781d_read_value
1484                                     (client,
1485                                      W83781D_REG_SCFG2) & BIT_SCFG2[i - 1])
1486                                         data->sens[i - 1] = 1;
1487                                 else
1488                                         data->sens[i - 1] = 2;
1489                         }
1490                         if (type == w83783s && i == 2)
1491                                 break;
1492                 }
1493         }
1494
1495         if (init && type != as99127f) {
1496                 /* Enable temp2 */
1497                 tmp = w83781d_read_value(client, W83781D_REG_TEMP2_CONFIG);
1498                 if (tmp & 0x01) {
1499                         dev_warn(&client->dev, "Enabling temp2, readings "
1500                                  "might not make sense\n");
1501                         w83781d_write_value(client, W83781D_REG_TEMP2_CONFIG,
1502                                 tmp & 0xfe);
1503                 }
1504
1505                 /* Enable temp3 */
1506                 if (type != w83783s) {
1507                         tmp = w83781d_read_value(client,
1508                                 W83781D_REG_TEMP3_CONFIG);
1509                         if (tmp & 0x01) {
1510                                 dev_warn(&client->dev, "Enabling temp3, "
1511                                          "readings might not make sense\n");
1512                                 w83781d_write_value(client,
1513                                         W83781D_REG_TEMP3_CONFIG, tmp & 0xfe);
1514                         }
1515                 }
1516
1517                 if (type != w83781d) {
1518                         /* enable comparator mode for temp2 and temp3 so
1519                            alarm indication will work correctly */
1520                         i = w83781d_read_value(client, W83781D_REG_IRQ);
1521                         if (!(i & 0x40))
1522                                 w83781d_write_value(client, W83781D_REG_IRQ,
1523                                                     i | 0x40);
1524                 }
1525         }
1526
1527         /* Start monitoring */
1528         w83781d_write_value(client, W83781D_REG_CONFIG,
1529                             (w83781d_read_value(client,
1530                                                 W83781D_REG_CONFIG) & 0xf7)
1531                             | 0x01);
1532 }
1533
1534 static struct w83781d_data *w83781d_update_device(struct device *dev)
1535 {
1536         struct i2c_client *client = to_i2c_client(dev);
1537         struct w83781d_data *data = i2c_get_clientdata(client);
1538         int i;
1539
1540         down(&data->update_lock);
1541
1542         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1543             || !data->valid) {
1544                 dev_dbg(dev, "Starting device update\n");
1545
1546                 for (i = 0; i <= 8; i++) {
1547                         if (data->type == w83783s && i == 1)
1548                                 continue;       /* 783S has no in1 */
1549                         data->in[i] =
1550                             w83781d_read_value(client, W83781D_REG_IN(i));
1551                         data->in_min[i] =
1552                             w83781d_read_value(client, W83781D_REG_IN_MIN(i));
1553                         data->in_max[i] =
1554                             w83781d_read_value(client, W83781D_REG_IN_MAX(i));
1555                         if ((data->type != w83782d)
1556                             && (data->type != w83627hf) && (i == 6))
1557                                 break;
1558                 }
1559                 for (i = 1; i <= 3; i++) {
1560                         data->fan[i - 1] =
1561                             w83781d_read_value(client, W83781D_REG_FAN(i));
1562                         data->fan_min[i - 1] =
1563                             w83781d_read_value(client, W83781D_REG_FAN_MIN(i));
1564                 }
1565                 if (data->type != w83781d && data->type != as99127f) {
1566                         for (i = 1; i <= 4; i++) {
1567                                 data->pwm[i - 1] =
1568                                     w83781d_read_value(client,
1569                                                        W83781D_REG_PWM(i));
1570                                 if ((data->type != w83782d
1571                                      || i2c_is_isa_client(client))
1572                                     && i == 2)
1573                                         break;
1574                         }
1575                         /* Only PWM2 can be disabled */
1576                         data->pwmenable[1] = (w83781d_read_value(client,
1577                                               W83781D_REG_PWMCLK12) & 0x08) >> 3;
1578                 }
1579
1580                 data->temp = w83781d_read_value(client, W83781D_REG_TEMP(1));
1581                 data->temp_max =
1582                     w83781d_read_value(client, W83781D_REG_TEMP_OVER(1));
1583                 data->temp_max_hyst =
1584                     w83781d_read_value(client, W83781D_REG_TEMP_HYST(1));
1585                 data->temp_add[0] =
1586                     w83781d_read_value(client, W83781D_REG_TEMP(2));
1587                 data->temp_max_add[0] =
1588                     w83781d_read_value(client, W83781D_REG_TEMP_OVER(2));
1589                 data->temp_max_hyst_add[0] =
1590                     w83781d_read_value(client, W83781D_REG_TEMP_HYST(2));
1591                 if (data->type != w83783s) {
1592                         data->temp_add[1] =
1593                             w83781d_read_value(client, W83781D_REG_TEMP(3));
1594                         data->temp_max_add[1] =
1595                             w83781d_read_value(client,
1596                                                W83781D_REG_TEMP_OVER(3));
1597                         data->temp_max_hyst_add[1] =
1598                             w83781d_read_value(client,
1599                                                W83781D_REG_TEMP_HYST(3));
1600                 }
1601                 i = w83781d_read_value(client, W83781D_REG_VID_FANDIV);
1602                 data->vid = i & 0x0f;
1603                 data->vid |= (w83781d_read_value(client,
1604                                         W83781D_REG_CHIPID) & 0x01) << 4;
1605                 data->fan_div[0] = (i >> 4) & 0x03;
1606                 data->fan_div[1] = (i >> 6) & 0x03;
1607                 data->fan_div[2] = (w83781d_read_value(client,
1608                                         W83781D_REG_PIN) >> 6) & 0x03;
1609                 if ((data->type != w83781d) && (data->type != as99127f)) {
1610                         i = w83781d_read_value(client, W83781D_REG_VBAT);
1611                         data->fan_div[0] |= (i >> 3) & 0x04;
1612                         data->fan_div[1] |= (i >> 4) & 0x04;
1613                         data->fan_div[2] |= (i >> 5) & 0x04;
1614                 }
1615                 data->alarms =
1616                     w83781d_read_value(client,
1617                                        W83781D_REG_ALARM1) +
1618                     (w83781d_read_value(client, W83781D_REG_ALARM2) << 8);
1619                 if ((data->type == w83782d) || (data->type == w83627hf)) {
1620                         data->alarms |=
1621                             w83781d_read_value(client,
1622                                                W83781D_REG_ALARM3) << 16;
1623                 }
1624                 i = w83781d_read_value(client, W83781D_REG_BEEP_INTS2);
1625                 data->beep_enable = i >> 7;
1626                 data->beep_mask = ((i & 0x7f) << 8) +
1627                     w83781d_read_value(client, W83781D_REG_BEEP_INTS1);
1628                 if ((data->type != w83781d) && (data->type != as99127f)) {
1629                         data->beep_mask |=
1630                             w83781d_read_value(client,
1631                                                W83781D_REG_BEEP_INTS3) << 16;
1632                 }
1633                 data->last_updated = jiffies;
1634                 data->valid = 1;
1635         }
1636
1637         up(&data->update_lock);
1638
1639         return data;
1640 }
1641
1642 static int __init
1643 sensors_w83781d_init(void)
1644 {
1645         int res;
1646
1647         res = i2c_add_driver(&w83781d_driver);
1648         if (res)
1649                 return res;
1650
1651         res = i2c_isa_add_driver(&w83781d_isa_driver);
1652         if (res) {
1653                 i2c_del_driver(&w83781d_driver);
1654                 return res;
1655         }
1656
1657         return 0;
1658 }
1659
1660 static void __exit
1661 sensors_w83781d_exit(void)
1662 {
1663         i2c_isa_del_driver(&w83781d_isa_driver);
1664         i2c_del_driver(&w83781d_driver);
1665 }
1666
1667 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
1668               "Philip Edelbrock <phil@netroedge.com>, "
1669               "and Mark Studebaker <mdsxyz123@yahoo.com>");
1670 MODULE_DESCRIPTION("W83781D driver");
1671 MODULE_LICENSE("GPL");
1672
1673 module_init(sensors_w83781d_init);
1674 module_exit(sensors_w83781d_exit);