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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/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         .owner = THIS_MODULE,
 273         .name = "w83781d",
 274         .id = I2C_DRIVERID_W83781D,
 275         .flags = I2C_DF_NOTIFY,
 276         .attach_adapter = w83781d_attach_adapter,
 277         .detach_client = w83781d_detach_client,
 278 };
 279
 280 static struct i2c_driver w83781d_isa_driver = {
 281         .owner = THIS_MODULE,
 282         .name = "w83781d-isa",
 283         .attach_adapter = w83781d_isa_attach_adapter,
 284         .detach_client = w83781d_detach_client,
 285 };
 286
 287
 288 /* following are the sysfs callback functions */
 289 #define show_in_reg(reg) \
 290 static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
 291 { \
 292         struct w83781d_data *data = w83781d_update_device(dev); \
 293         return sprintf(buf,"%ld\n", (long)IN_FROM_REG(data->reg[nr] * 10)); \
 294 }
 295 show_in_reg(in);
 296 show_in_reg(in_min);
 297 show_in_reg(in_max);
 298
 299 #define store_in_reg(REG, reg) \
 300 static ssize_t store_in_##reg (struct device *dev, const char *buf, size_t count, int nr) \
 301 { \
 302         struct i2c_client *client = to_i2c_client(dev); \
 303         struct w83781d_data *data = i2c_get_clientdata(client); \
 304         u32 val; \
 305          \
 306         val = simple_strtoul(buf, NULL, 10) / 10; \
 307          \
 308         down(&data->update_lock); \
 309         data->in_##reg[nr] = IN_TO_REG(val); \
 310         w83781d_write_value(client, W83781D_REG_IN_##REG(nr), data->in_##reg[nr]); \
 311          \
 312         up(&data->update_lock); \
 313         return count; \
 314 }
 315 store_in_reg(MIN, min);
 316 store_in_reg(MAX, max);
 317
 318 #define sysfs_in_offset(offset) \
 319 static ssize_t \
 320 show_regs_in_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 321 { \
 322         return show_in(dev, buf, offset); \
 323 } \
 324 static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_regs_in_##offset, NULL);
 325
 326 #define sysfs_in_reg_offset(reg, offset) \
 327 static ssize_t show_regs_in_##reg##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 328 { \
 329         return show_in_##reg (dev, buf, offset); \
 330 } \
 331 static ssize_t store_regs_in_##reg##offset (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 332 { \
 333         return store_in_##reg (dev, buf, count, offset); \
 334 } \
 335 static DEVICE_ATTR(in##offset##_##reg, S_IRUGO| S_IWUSR, show_regs_in_##reg##offset, store_regs_in_##reg##offset);
 336
 337 #define sysfs_in_offsets(offset) \
 338 sysfs_in_offset(offset); \
 339 sysfs_in_reg_offset(min, offset); \
 340 sysfs_in_reg_offset(max, offset);
 341
 342 sysfs_in_offsets(0);
 343 sysfs_in_offsets(1);
 344 sysfs_in_offsets(2);
 345 sysfs_in_offsets(3);
 346 sysfs_in_offsets(4);
 347 sysfs_in_offsets(5);
 348 sysfs_in_offsets(6);
 349 sysfs_in_offsets(7);
 350 sysfs_in_offsets(8);
 351
 352 #define device_create_file_in(client, offset) \
 353 do { \
 354 device_create_file(&client->dev, &dev_attr_in##offset##_input); \
 355 device_create_file(&client->dev, &dev_attr_in##offset##_min); \
 356 device_create_file(&client->dev, &dev_attr_in##offset##_max); \
 357 } while (0)
 358
 359 #define show_fan_reg(reg) \
 360 static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
 361 { \
 362         struct w83781d_data *data = w83781d_update_device(dev); \
 363         return sprintf(buf,"%ld\n", \
 364                 FAN_FROM_REG(data->reg[nr-1], (long)DIV_FROM_REG(data->fan_div[nr-1]))); \
 365 }
 366 show_fan_reg(fan);
 367 show_fan_reg(fan_min);
 368
 369 static ssize_t
 370 store_fan_min(struct device *dev, const char *buf, size_t count, int nr)
 371 {
 372         struct i2c_client *client = to_i2c_client(dev);
 373         struct w83781d_data *data = i2c_get_clientdata(client);
 374         u32 val;
 375
 376         val = simple_strtoul(buf, NULL, 10);
 377
 378         down(&data->update_lock);
 379         data->fan_min[nr - 1] =
 380             FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr - 1]));
 381         w83781d_write_value(client, W83781D_REG_FAN_MIN(nr),
 382                             data->fan_min[nr - 1]);
 383
 384         up(&data->update_lock);
 385         return count;
 386 }
 387
 388 #define sysfs_fan_offset(offset) \
 389 static ssize_t show_regs_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 390 { \
 391         return show_fan(dev, buf, offset); \
 392 } \
 393 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_regs_fan_##offset, NULL);
 394
 395 #define sysfs_fan_min_offset(offset) \
 396 static ssize_t show_regs_fan_min##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 397 { \
 398         return show_fan_min(dev, buf, offset); \
 399 } \
 400 static ssize_t store_regs_fan_min##offset (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 401 { \
 402         return store_fan_min(dev, buf, count, offset); \
 403 } \
 404 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, show_regs_fan_min##offset, store_regs_fan_min##offset);
 405
 406 sysfs_fan_offset(1);
 407 sysfs_fan_min_offset(1);
 408 sysfs_fan_offset(2);
 409 sysfs_fan_min_offset(2);
 410 sysfs_fan_offset(3);
 411 sysfs_fan_min_offset(3);
 412
 413 #define device_create_file_fan(client, offset) \
 414 do { \
 415 device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
 416 device_create_file(&client->dev, &dev_attr_fan##offset##_min); \
 417 } while (0)
 418
 419 #define show_temp_reg(reg) \
 420 static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
 421 { \
 422         struct w83781d_data *data = w83781d_update_device(dev); \
 423         if (nr >= 2) {  /* TEMP2 and TEMP3 */ \
 424                 return sprintf(buf,"%d\n", \
 425                         LM75_TEMP_FROM_REG(data->reg##_add[nr-2])); \
 426         } else {        /* TEMP1 */ \
 427                 return sprintf(buf,"%ld\n", (long)TEMP_FROM_REG(data->reg)); \
 428         } \
 429 }
 430 show_temp_reg(temp);
 431 show_temp_reg(temp_max);
 432 show_temp_reg(temp_max_hyst);
 433
 434 #define store_temp_reg(REG, reg) \
 435 static ssize_t store_temp_##reg (struct device *dev, const char *buf, size_t count, int nr) \
 436 { \
 437         struct i2c_client *client = to_i2c_client(dev); \
 438         struct w83781d_data *data = i2c_get_clientdata(client); \
 439         s32 val; \
 440          \
 441         val = simple_strtol(buf, NULL, 10); \
 442          \
 443         down(&data->update_lock); \
 444          \
 445         if (nr >= 2) {  /* TEMP2 and TEMP3 */ \
 446                 data->temp_##reg##_add[nr-2] = LM75_TEMP_TO_REG(val); \
 447                 w83781d_write_value(client, W83781D_REG_TEMP_##REG(nr), \
 448                                 data->temp_##reg##_add[nr-2]); \
 449         } else {        /* TEMP1 */ \
 450                 data->temp_##reg = TEMP_TO_REG(val); \
 451                 w83781d_write_value(client, W83781D_REG_TEMP_##REG(nr), \
 452                         data->temp_##reg); \
 453         } \
 454          \
 455         up(&data->update_lock); \
 456         return count; \
 457 }
 458 store_temp_reg(OVER, max);
 459 store_temp_reg(HYST, max_hyst);
 460
 461 #define sysfs_temp_offset(offset) \
 462 static ssize_t \
 463 show_regs_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 464 { \
 465         return show_temp(dev, buf, offset); \
 466 } \
 467 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_regs_temp_##offset, NULL);
 468
 469 #define sysfs_temp_reg_offset(reg, offset) \
 470 static ssize_t show_regs_temp_##reg##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 471 { \
 472         return show_temp_##reg (dev, buf, offset); \
 473 } \
 474 static ssize_t store_regs_temp_##reg##offset (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 475 { \
 476         return store_temp_##reg (dev, buf, count, offset); \
 477 } \
 478 static DEVICE_ATTR(temp##offset##_##reg, S_IRUGO| S_IWUSR, show_regs_temp_##reg##offset, store_regs_temp_##reg##offset);
 479
 480 #define sysfs_temp_offsets(offset) \
 481 sysfs_temp_offset(offset); \
 482 sysfs_temp_reg_offset(max, offset); \
 483 sysfs_temp_reg_offset(max_hyst, offset);
 484
 485 sysfs_temp_offsets(1);
 486 sysfs_temp_offsets(2);
 487 sysfs_temp_offsets(3);
 488
 489 #define device_create_file_temp(client, offset) \
 490 do { \
 491 device_create_file(&client->dev, &dev_attr_temp##offset##_input); \
 492 device_create_file(&client->dev, &dev_attr_temp##offset##_max); \
 493 device_create_file(&client->dev, &dev_attr_temp##offset##_max_hyst); \
 494 } while (0)
 495
 496 static ssize_t
 497 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
 498 {
 499         struct w83781d_data *data = w83781d_update_device(dev);
 500         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
 501 }
 502
 503 static
 504 DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
 505 #define device_create_file_vid(client) \
 506 device_create_file(&client->dev, &dev_attr_cpu0_vid);
 507 static ssize_t
 508 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
 509 {
 510         struct w83781d_data *data = w83781d_update_device(dev);
 511         return sprintf(buf, "%ld\n", (long) data->vrm);
 512 }
 513
 514 static ssize_t
 515 store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 516 {
 517         struct i2c_client *client = to_i2c_client(dev);
 518         struct w83781d_data *data = i2c_get_clientdata(client);
 519         u32 val;
 520
 521         val = simple_strtoul(buf, NULL, 10);
 522         data->vrm = val;
 523
 524         return count;
 525 }
 526
 527 static
 528 DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
 529 #define device_create_file_vrm(client) \
 530 device_create_file(&client->dev, &dev_attr_vrm);
 531 static ssize_t
 532 show_alarms_reg(struct device *dev, struct device_attribute *attr, char *buf)
 533 {
 534         struct w83781d_data *data = w83781d_update_device(dev);
 535         return sprintf(buf, "%u\n", data->alarms);
 536 }
 537
 538 static
 539 DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
 540 #define device_create_file_alarms(client) \
 541 device_create_file(&client->dev, &dev_attr_alarms);
 542 static ssize_t show_beep_mask (struct device *dev, struct device_attribute *attr, char *buf)
 543 {
 544         struct w83781d_data *data = w83781d_update_device(dev);
 545         return sprintf(buf, "%ld\n",
 546                        (long)BEEP_MASK_FROM_REG(data->beep_mask, data->type));
 547 }
 548 static ssize_t show_beep_enable (struct device *dev, struct device_attribute *attr, char *buf)
 549 {
 550         struct w83781d_data *data = w83781d_update_device(dev);
 551         return sprintf(buf, "%ld\n",
 552                        (long)BEEP_ENABLE_FROM_REG(data->beep_enable));
 553 }
 554
 555 #define BEEP_ENABLE                     0       /* Store beep_enable */
 556 #define BEEP_MASK                       1       /* Store beep_mask */
 557
 558 static ssize_t
 559 store_beep_reg(struct device *dev, const char *buf, size_t count,
 560                int update_mask)
 561 {
 562         struct i2c_client *client = to_i2c_client(dev);
 563         struct w83781d_data *data = i2c_get_clientdata(client);
 564         u32 val, val2;
 565
 566         val = simple_strtoul(buf, NULL, 10);
 567
 568         down(&data->update_lock);
 569
 570         if (update_mask == BEEP_MASK) { /* We are storing beep_mask */
 571                 data->beep_mask = BEEP_MASK_TO_REG(val, data->type);
 572                 w83781d_write_value(client, W83781D_REG_BEEP_INTS1,
 573                                     data->beep_mask & 0xff);
 574
 575                 if ((data->type != w83781d) && (data->type != as99127f)) {
 576                         w83781d_write_value(client, W83781D_REG_BEEP_INTS3,
 577                                             ((data->beep_mask) >> 16) & 0xff);
 578                 }
 579
 580                 val2 = (data->beep_mask >> 8) & 0x7f;
 581         } else {                /* We are storing beep_enable */
 582                 val2 = w83781d_read_value(client, W83781D_REG_BEEP_INTS2) & 0x7f;
 583                 data->beep_enable = BEEP_ENABLE_TO_REG(val);
 584         }
 585
 586         w83781d_write_value(client, W83781D_REG_BEEP_INTS2,
 587                             val2 | data->beep_enable << 7);
 588
 589         up(&data->update_lock);
 590         return count;
 591 }
 592
 593 #define sysfs_beep(REG, reg) \
 594 static ssize_t show_regs_beep_##reg (struct device *dev, struct device_attribute *attr, char *buf) \
 595 { \
 596         return show_beep_##reg(dev, attr, buf); \
 597 } \
 598 static ssize_t store_regs_beep_##reg (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 599 { \
 600         return store_beep_reg(dev, buf, count, BEEP_##REG); \
 601 } \
 602 static DEVICE_ATTR(beep_##reg, S_IRUGO | S_IWUSR, show_regs_beep_##reg, store_regs_beep_##reg);
 603
 604 sysfs_beep(ENABLE, enable);
 605 sysfs_beep(MASK, mask);
 606
 607 #define device_create_file_beep(client) \
 608 do { \
 609 device_create_file(&client->dev, &dev_attr_beep_enable); \
 610 device_create_file(&client->dev, &dev_attr_beep_mask); \
 611 } while (0)
 612
 613 static ssize_t
 614 show_fan_div_reg(struct device *dev, char *buf, int nr)
 615 {
 616         struct w83781d_data *data = w83781d_update_device(dev);
 617         return sprintf(buf, "%ld\n",
 618                        (long) DIV_FROM_REG(data->fan_div[nr - 1]));
 619 }
 620
 621 /* Note: we save and restore the fan minimum here, because its value is
 622    determined in part by the fan divisor.  This follows the principle of
 623    least suprise; the user doesn't expect the fan minimum to change just
 624    because the divisor changed. */
 625 static ssize_t
 626 store_fan_div_reg(struct device *dev, const char *buf, size_t count, int nr)
 627 {
 628         struct i2c_client *client = to_i2c_client(dev);
 629         struct w83781d_data *data = i2c_get_clientdata(client);
 630         unsigned long min;
 631         u8 reg;
 632         unsigned long val = simple_strtoul(buf, NULL, 10);
 633
 634         down(&data->update_lock);
 635
 636         /* Save fan_min */
 637         min = FAN_FROM_REG(data->fan_min[nr],
 638                            DIV_FROM_REG(data->fan_div[nr]));
 639
 640         data->fan_div[nr] = DIV_TO_REG(val, data->type);
 641
 642         reg = (w83781d_read_value(client, nr==2 ? W83781D_REG_PIN : W83781D_REG_VID_FANDIV)
 643                & (nr==0 ? 0xcf : 0x3f))
 644             | ((data->fan_div[nr] & 0x03) << (nr==0 ? 4 : 6));
 645         w83781d_write_value(client, nr==2 ? W83781D_REG_PIN : W83781D_REG_VID_FANDIV, reg);
 646
 647         /* w83781d and as99127f don't have extended divisor bits */
 648         if (data->type != w83781d && data->type != as99127f) {
 649                 reg = (w83781d_read_value(client, W83781D_REG_VBAT)
 650                        & ~(1 << (5 + nr)))
 651                     | ((data->fan_div[nr] & 0x04) << (3 + nr));
 652                 w83781d_write_value(client, W83781D_REG_VBAT, reg);
 653         }
 654
 655         /* Restore fan_min */
 656         data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 657         w83781d_write_value(client, W83781D_REG_FAN_MIN(nr+1), data->fan_min[nr]);
 658
 659         up(&data->update_lock);
 660         return count;
 661 }
 662
 663 #define sysfs_fan_div(offset) \
 664 static ssize_t show_regs_fan_div_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 665 { \
 666         return show_fan_div_reg(dev, buf, offset); \
 667 } \
 668 static ssize_t store_regs_fan_div_##offset (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 669 { \
 670         return store_fan_div_reg(dev, buf, count, offset - 1); \
 671 } \
 672 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, show_regs_fan_div_##offset, store_regs_fan_div_##offset);
 673
 674 sysfs_fan_div(1);
 675 sysfs_fan_div(2);
 676 sysfs_fan_div(3);
 677
 678 #define device_create_file_fan_div(client, offset) \
 679 do { \
 680 device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
 681 } while (0)
 682
 683 static ssize_t
 684 show_pwm_reg(struct device *dev, char *buf, int nr)
 685 {
 686         struct w83781d_data *data = w83781d_update_device(dev);
 687         return sprintf(buf, "%ld\n", (long) PWM_FROM_REG(data->pwm[nr - 1]));
 688 }
 689
 690 static ssize_t
 691 show_pwmenable_reg(struct device *dev, char *buf, int nr)
 692 {
 693         struct w83781d_data *data = w83781d_update_device(dev);
 694         return sprintf(buf, "%ld\n", (long) data->pwmenable[nr - 1]);
 695 }
 696
 697 static ssize_t
 698 store_pwm_reg(struct device *dev, const char *buf, size_t count, int nr)
 699 {
 700         struct i2c_client *client = to_i2c_client(dev);
 701         struct w83781d_data *data = i2c_get_clientdata(client);
 702         u32 val;
 703
 704         val = simple_strtoul(buf, NULL, 10);
 705
 706         down(&data->update_lock);
 707         data->pwm[nr - 1] = PWM_TO_REG(val);
 708         w83781d_write_value(client, W83781D_REG_PWM(nr), data->pwm[nr - 1]);
 709         up(&data->update_lock);
 710         return count;
 711 }
 712
 713 static ssize_t
 714 store_pwmenable_reg(struct device *dev, const char *buf, size_t count, int nr)
 715 {
 716         struct i2c_client *client = to_i2c_client(dev);
 717         struct w83781d_data *data = i2c_get_clientdata(client);
 718         u32 val, reg;
 719
 720         val = simple_strtoul(buf, NULL, 10);
 721
 722         down(&data->update_lock);
 723
 724         switch (val) {
 725         case 0:
 726         case 1:
 727                 reg = w83781d_read_value(client, W83781D_REG_PWMCLK12);
 728                 w83781d_write_value(client, W83781D_REG_PWMCLK12,
 729                                     (reg & 0xf7) | (val << 3));
 730
 731                 reg = w83781d_read_value(client, W83781D_REG_BEEP_CONFIG);
 732                 w83781d_write_value(client, W83781D_REG_BEEP_CONFIG,
 733                                     (reg & 0xef) | (!val << 4));
 734
 735                 data->pwmenable[nr - 1] = val;
 736                 break;
 737
 738         default:
 739                 up(&data->update_lock);
 740                 return -EINVAL;
 741         }
 742
 743         up(&data->update_lock);
 744         return count;
 745 }
 746
 747 #define sysfs_pwm(offset) \
 748 static ssize_t show_regs_pwm_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 749 { \
 750         return show_pwm_reg(dev, buf, offset); \
 751 } \
 752 static ssize_t store_regs_pwm_##offset (struct device *dev, struct device_attribute *attr, \
 753                 const char *buf, size_t count) \
 754 { \
 755         return store_pwm_reg(dev, buf, count, offset); \
 756 } \
 757 static DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
 758                 show_regs_pwm_##offset, store_regs_pwm_##offset);
 759
 760 #define sysfs_pwmenable(offset) \
 761 static ssize_t show_regs_pwmenable_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 762 { \
 763         return show_pwmenable_reg(dev, buf, offset); \
 764 } \
 765 static ssize_t store_regs_pwmenable_##offset (struct device *dev, struct device_attribute *attr, \
 766                 const char *buf, size_t count) \
 767 { \
 768         return store_pwmenable_reg(dev, buf, count, offset); \
 769 } \
 770 static DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
 771                 show_regs_pwmenable_##offset, store_regs_pwmenable_##offset);
 772
 773 sysfs_pwm(1);
 774 sysfs_pwm(2);
 775 sysfs_pwmenable(2);             /* only PWM2 can be enabled/disabled */
 776 sysfs_pwm(3);
 777 sysfs_pwm(4);
 778
 779 #define device_create_file_pwm(client, offset) \
 780 do { \
 781 device_create_file(&client->dev, &dev_attr_pwm##offset); \
 782 } while (0)
 783
 784 #define device_create_file_pwmenable(client, offset) \
 785 do { \
 786 device_create_file(&client->dev, &dev_attr_pwm##offset##_enable); \
 787 } while (0)
 788
 789 static ssize_t
 790 show_sensor_reg(struct device *dev, char *buf, int nr)
 791 {
 792         struct w83781d_data *data = w83781d_update_device(dev);
 793         return sprintf(buf, "%ld\n", (long) data->sens[nr - 1]);
 794 }
 795
 796 static ssize_t
 797 store_sensor_reg(struct device *dev, const char *buf, size_t count, int nr)
 798 {
 799         struct i2c_client *client = to_i2c_client(dev);
 800         struct w83781d_data *data = i2c_get_clientdata(client);
 801         u32 val, tmp;
 802
 803         val = simple_strtoul(buf, NULL, 10);
 804
 805         down(&data->update_lock);
 806
 807         switch (val) {
 808         case 1:         /* PII/Celeron diode */
 809                 tmp = w83781d_read_value(client, W83781D_REG_SCFG1);
 810                 w83781d_write_value(client, W83781D_REG_SCFG1,
 811                                     tmp | BIT_SCFG1[nr - 1]);
 812                 tmp = w83781d_read_value(client, W83781D_REG_SCFG2);
 813                 w83781d_write_value(client, W83781D_REG_SCFG2,
 814                                     tmp | BIT_SCFG2[nr - 1]);
 815                 data->sens[nr - 1] = val;
 816                 break;
 817         case 2:         /* 3904 */
 818                 tmp = w83781d_read_value(client, W83781D_REG_SCFG1);
 819                 w83781d_write_value(client, W83781D_REG_SCFG1,
 820                                     tmp | BIT_SCFG1[nr - 1]);
 821                 tmp = w83781d_read_value(client, W83781D_REG_SCFG2);
 822                 w83781d_write_value(client, W83781D_REG_SCFG2,
 823                                     tmp & ~BIT_SCFG2[nr - 1]);
 824                 data->sens[nr - 1] = val;
 825                 break;
 826         case W83781D_DEFAULT_BETA:      /* thermistor */
 827                 tmp = w83781d_read_value(client, W83781D_REG_SCFG1);
 828                 w83781d_write_value(client, W83781D_REG_SCFG1,
 829                                     tmp & ~BIT_SCFG1[nr - 1]);
 830                 data->sens[nr - 1] = val;
 831                 break;
 832         default:
 833                 dev_err(dev, "Invalid sensor type %ld; must be 1, 2, or %d\n",
 834                        (long) val, W83781D_DEFAULT_BETA);
 835                 break;
 836         }
 837
 838         up(&data->update_lock);
 839         return count;
 840 }
 841
 842 #define sysfs_sensor(offset) \
 843 static ssize_t show_regs_sensor_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 844 { \
 845     return show_sensor_reg(dev, buf, offset); \
 846 } \
 847 static ssize_t store_regs_sensor_##offset (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 848 { \
 849     return store_sensor_reg(dev, buf, count, offset); \
 850 } \
 851 static DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, show_regs_sensor_##offset, store_regs_sensor_##offset);
 852
 853 sysfs_sensor(1);
 854 sysfs_sensor(2);
 855 sysfs_sensor(3);
 856
 857 #define device_create_file_sensor(client, offset) \
 858 do { \
 859 device_create_file(&client->dev, &dev_attr_temp##offset##_type); \
 860 } while (0)
 861
 862 /* This function is called when:
 863      * w83781d_driver is inserted (when this module is loaded), for each
 864        available adapter
 865      * when a new adapter is inserted (and w83781d_driver is still present) */
 866 static int
 867 w83781d_attach_adapter(struct i2c_adapter *adapter)
 868 {
 869         if (!(adapter->class & I2C_CLASS_HWMON))
 870                 return 0;
 871         return i2c_probe(adapter, &addr_data, w83781d_detect);
 872 }
 873
 874 static int
 875 w83781d_isa_attach_adapter(struct i2c_adapter *adapter)
 876 {
 877         return w83781d_detect(adapter, isa_address, -1);
 878 }
 879
 880 /* Assumes that adapter is of I2C, not ISA variety.
 881  * OTHERWISE DON'T CALL THIS
 882  */
 883 static int
 884 w83781d_detect_subclients(struct i2c_adapter *adapter, int address, int kind,
 885                 struct i2c_client *new_client)
 886 {
 887         int i, val1 = 0, id;
 888         int err;
 889         const char *client_name = "";
 890         struct w83781d_data *data = i2c_get_clientdata(new_client);
 891
 892         data->lm75[0] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 893         if (!(data->lm75[0])) {
 894                 err = -ENOMEM;
 895                 goto ERROR_SC_0;
 896         }
 897
 898         id = i2c_adapter_id(adapter);
 899
 900         if (force_subclients[0] == id && force_subclients[1] == address) {
 901                 for (i = 2; i <= 3; i++) {
 902                         if (force_subclients[i] < 0x48 ||
 903                             force_subclients[i] > 0x4f) {
 904                                 dev_err(&new_client->dev, "Invalid subclient "
 905                                         "address %d; must be 0x48-0x4f\n",
 906                                         force_subclients[i]);
 907                                 err = -EINVAL;
 908                                 goto ERROR_SC_1;
 909                         }
 910                 }
 911                 w83781d_write_value(new_client, W83781D_REG_I2C_SUBADDR,
 912                                 (force_subclients[2] & 0x07) |
 913                                 ((force_subclients[3] & 0x07) << 4));
 914                 data->lm75[0]->addr = force_subclients[2];
 915         } else {
 916                 val1 = w83781d_read_value(new_client, W83781D_REG_I2C_SUBADDR);
 917                 data->lm75[0]->addr = 0x48 + (val1 & 0x07);
 918         }
 919
 920         if (kind != w83783s) {
 921                 data->lm75[1] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 922                 if (!(data->lm75[1])) {
 923                         err = -ENOMEM;
 924                         goto ERROR_SC_1;
 925                 }
 926
 927                 if (force_subclients[0] == id &&
 928                     force_subclients[1] == address) {
 929                         data->lm75[1]->addr = force_subclients[3];
 930                 } else {
 931                         data->lm75[1]->addr = 0x48 + ((val1 >> 4) & 0x07);
 932                 }
 933                 if (data->lm75[0]->addr == data->lm75[1]->addr) {
 934                         dev_err(&new_client->dev,
 935                                "Duplicate addresses 0x%x for subclients.\n",
 936                                data->lm75[0]->addr);
 937                         err = -EBUSY;
 938                         goto ERROR_SC_2;
 939                 }
 940         }
 941
 942         if (kind == w83781d)
 943                 client_name = "w83781d subclient";
 944         else if (kind == w83782d)
 945                 client_name = "w83782d subclient";
 946         else if (kind == w83783s)
 947                 client_name = "w83783s subclient";
 948         else if (kind == w83627hf)
 949                 client_name = "w83627hf subclient";
 950         else if (kind == as99127f)
 951                 client_name = "as99127f subclient";
 952
 953         for (i = 0; i <= 1; i++) {
 954                 /* store all data in w83781d */
 955                 i2c_set_clientdata(data->lm75[i], NULL);
 956                 data->lm75[i]->adapter = adapter;
 957                 data->lm75[i]->driver = &w83781d_driver;
 958                 data->lm75[i]->flags = 0;
 959                 strlcpy(data->lm75[i]->name, client_name,
 960                         I2C_NAME_SIZE);
 961                 if ((err = i2c_attach_client(data->lm75[i]))) {
 962                         dev_err(&new_client->dev, "Subclient %d "
 963                                 "registration at address 0x%x "
 964                                 "failed.\n", i, data->lm75[i]->addr);
 965                         if (i == 1)
 966                                 goto ERROR_SC_3;
 967                         goto ERROR_SC_2;
 968                 }
 969                 if (kind == w83783s)
 970                         break;
 971         }
 972
 973         return 0;
 974
 975 /* Undo inits in case of errors */
 976 ERROR_SC_3:
 977         i2c_detach_client(data->lm75[0]);
 978 ERROR_SC_2:
 979         if (data->lm75[1])
 980                 kfree(data->lm75[1]);
 981 ERROR_SC_1:
 982         if (data->lm75[0])
 983                 kfree(data->lm75[0]);
 984 ERROR_SC_0:
 985         return err;
 986 }
 987
 988 static int
 989 w83781d_detect(struct i2c_adapter *adapter, int address, int kind)
 990 {
 991         int i = 0, val1 = 0, val2;
 992         struct i2c_client *new_client;
 993         struct w83781d_data *data;
 994         int err;
 995         const char *client_name = "";
 996         int is_isa = i2c_is_isa_adapter(adapter);
 997         enum vendor { winbond, asus } vendid;
 998
 999         if (!is_isa
1000             && !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1001                 err = -EINVAL;
1002                 goto ERROR0;
1003         }
1004
1005         /* Prevent users from forcing a kind for a bus it isn't supposed
1006            to possibly be on */
1007         if (is_isa && (kind == as99127f || kind == w83783s)) {
1008                 dev_err(&adapter->dev,
1009                         "Cannot force I2C-only chip for ISA address 0x%02x.\n",
1010                         address);
1011                 err = -EINVAL;
1012                 goto ERROR0;
1013         }
1014
1015         if (is_isa)
1016                 if (!request_region(address, W83781D_EXTENT,
1017                                     w83781d_isa_driver.name)) {
1018                         dev_dbg(&adapter->dev, "Request of region "
1019                                 "0x%x-0x%x for w83781d failed\n", address,
1020                                 address + W83781D_EXTENT - 1);
1021                         err = -EBUSY;
1022                         goto ERROR0;
1023                 }
1024
1025         /* Probe whether there is anything available on this address. Already
1026            done for SMBus clients */
1027         if (kind < 0) {
1028                 if (is_isa) {
1029
1030 #define REALLY_SLOW_IO
1031                         /* We need the timeouts for at least some LM78-like
1032                            chips. But only if we read 'undefined' registers. */
1033                         i = inb_p(address + 1);
1034                         if (inb_p(address + 2) != i
1035                          || inb_p(address + 3) != i
1036                          || inb_p(address + 7) != i) {
1037                                 dev_dbg(&adapter->dev, "Detection of w83781d "
1038                                         "chip failed at step 1\n");
1039                                 err = -ENODEV;
1040                                 goto ERROR1;
1041                         }
1042 #undef REALLY_SLOW_IO
1043
1044                         /* Let's just hope nothing breaks here */
1045                         i = inb_p(address + 5) & 0x7f;
1046                         outb_p(~i & 0x7f, address + 5);
1047                         val2 = inb_p(address + 5) & 0x7f;
1048                         if (val2 != (~i & 0x7f)) {
1049                                 outb_p(i, address + 5);
1050                                 dev_dbg(&adapter->dev, "Detection of w83781d "
1051                                         "chip failed at step 2 (0x%x != "
1052                                         "0x%x at 0x%x)\n", val2, ~i & 0x7f,
1053                                         address + 5);
1054                                 err = -ENODEV;
1055                                 goto ERROR1;
1056                         }
1057                 }
1058         }
1059
1060         /* OK. For now, we presume we have a valid client. We now create the
1061            client structure, even though we cannot fill it completely yet.
1062            But it allows us to access w83781d_{read,write}_value. */
1063
1064         if (!(data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL))) {
1065                 err = -ENOMEM;
1066                 goto ERROR1;
1067         }
1068
1069         new_client = &data->client;
1070         i2c_set_clientdata(new_client, data);
1071         new_client->addr = address;
1072         init_MUTEX(&data->lock);
1073         new_client->adapter = adapter;
1074         new_client->driver = is_isa ? &w83781d_isa_driver : &w83781d_driver;
1075         new_client->flags = 0;
1076
1077         /* Now, we do the remaining detection. */
1078
1079         /* The w8378?d may be stuck in some other bank than bank 0. This may
1080            make reading other information impossible. Specify a force=... or
1081            force_*=... parameter, and the Winbond will be reset to the right
1082            bank. */
1083         if (kind < 0) {
1084                 if (w83781d_read_value(new_client, W83781D_REG_CONFIG) & 0x80) {
1085                         dev_dbg(&new_client->dev, "Detection failed at step "
1086                                 "3\n");
1087                         err = -ENODEV;
1088                         goto ERROR2;
1089                 }
1090                 val1 = w83781d_read_value(new_client, W83781D_REG_BANK);
1091                 val2 = w83781d_read_value(new_client, W83781D_REG_CHIPMAN);
1092                 /* Check for Winbond or Asus ID if in bank 0 */
1093                 if ((!(val1 & 0x07)) &&
1094                     (((!(val1 & 0x80)) && (val2 != 0xa3) && (val2 != 0xc3))
1095                      || ((val1 & 0x80) && (val2 != 0x5c) && (val2 != 0x12)))) {
1096                         dev_dbg(&new_client->dev, "Detection failed at step "
1097                                 "4\n");
1098                         err = -ENODEV;
1099                         goto ERROR2;
1100                 }
1101                 /* If Winbond SMBus, check address at 0x48.
1102                    Asus doesn't support, except for as99127f rev.2 */
1103                 if ((!is_isa) && (((!(val1 & 0x80)) && (val2 == 0xa3)) ||
1104                                   ((val1 & 0x80) && (val2 == 0x5c)))) {
1105                         if (w83781d_read_value
1106                             (new_client, W83781D_REG_I2C_ADDR) != address) {
1107                                 dev_dbg(&new_client->dev, "Detection failed "
1108                                         "at step 5\n");
1109                                 err = -ENODEV;
1110                                 goto ERROR2;
1111                         }
1112                 }
1113         }
1114
1115         /* We have either had a force parameter, or we have already detected the
1116            Winbond. Put it now into bank 0 and Vendor ID High Byte */
1117         w83781d_write_value(new_client, W83781D_REG_BANK,
1118                             (w83781d_read_value(new_client,
1119                                                 W83781D_REG_BANK) & 0x78) |
1120                             0x80);
1121
1122         /* Determine the chip type. */
1123         if (kind <= 0) {
1124                 /* get vendor ID */
1125                 val2 = w83781d_read_value(new_client, W83781D_REG_CHIPMAN);
1126                 if (val2 == 0x5c)
1127                         vendid = winbond;
1128                 else if (val2 == 0x12)
1129                         vendid = asus;
1130                 else {
1131                         dev_dbg(&new_client->dev, "Chip was made by neither "
1132                                 "Winbond nor Asus?\n");
1133                         err = -ENODEV;
1134                         goto ERROR2;
1135                 }
1136
1137                 val1 = w83781d_read_value(new_client, W83781D_REG_WCHIPID);
1138                 if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond)
1139                         kind = w83781d;
1140                 else if (val1 == 0x30 && vendid == winbond)
1141                         kind = w83782d;
1142                 else if (val1 == 0x40 && vendid == winbond && !is_isa
1143                                 && address == 0x2d)
1144                         kind = w83783s;
1145                 else if (val1 == 0x21 && vendid == winbond)
1146                         kind = w83627hf;
1147                 else if (val1 == 0x31 && !is_isa && address >= 0x28)
1148                         kind = as99127f;
1149                 else {
1150                         if (kind == 0)
1151                                 dev_warn(&new_client->dev, "Ignoring 'force' "
1152                                          "parameter for unknown chip at "
1153                                          "adapter %d, address 0x%02x\n",
1154                                          i2c_adapter_id(adapter), address);
1155                         err = -EINVAL;
1156                         goto ERROR2;
1157                 }
1158         }
1159
1160         if (kind == w83781d) {
1161                 client_name = "w83781d";
1162         } else if (kind == w83782d) {
1163                 client_name = "w83782d";
1164         } else if (kind == w83783s) {
1165                 client_name = "w83783s";
1166         } else if (kind == w83627hf) {
1167                 client_name = "w83627hf";
1168         } else if (kind == as99127f) {
1169                 client_name = "as99127f";
1170         }
1171
1172         /* Fill in the remaining client fields and put into the global list */
1173         strlcpy(new_client->name, client_name, I2C_NAME_SIZE);
1174         data->type = kind;
1175
1176         data->valid = 0;
1177         init_MUTEX(&data->update_lock);
1178
1179         /* Tell the I2C layer a new client has arrived */
1180         if ((err = i2c_attach_client(new_client)))
1181                 goto ERROR2;
1182
1183         /* attach secondary i2c lm75-like clients */
1184         if (!is_isa) {
1185                 if ((err = w83781d_detect_subclients(adapter, address,
1186                                 kind, new_client)))
1187                         goto ERROR3;
1188         } else {
1189                 data->lm75[0] = NULL;
1190                 data->lm75[1] = NULL;
1191         }
1192
1193         /* Initialize the chip */
1194         w83781d_init_client(new_client);
1195
1196         /* A few vars need to be filled upon startup */
1197         for (i = 1; i <= 3; i++) {
1198                 data->fan_min[i - 1] = w83781d_read_value(new_client,
1199                                         W83781D_REG_FAN_MIN(i));
1200         }
1201         if (kind != w83781d && kind != as99127f)
1202                 for (i = 0; i < 4; i++)
1203                         data->pwmenable[i] = 1;
1204
1205         /* Register sysfs hooks */
1206         data->class_dev = hwmon_device_register(&new_client->dev);
1207         if (IS_ERR(data->class_dev)) {
1208                 err = PTR_ERR(data->class_dev);
1209                 goto ERROR4;
1210         }
1211
1212         device_create_file_in(new_client, 0);
1213         if (kind != w83783s)
1214                 device_create_file_in(new_client, 1);
1215         device_create_file_in(new_client, 2);
1216         device_create_file_in(new_client, 3);
1217         device_create_file_in(new_client, 4);
1218         device_create_file_in(new_client, 5);
1219         device_create_file_in(new_client, 6);
1220         if (kind != as99127f && kind != w83781d && kind != w83783s) {
1221                 device_create_file_in(new_client, 7);
1222                 device_create_file_in(new_client, 8);
1223         }
1224
1225         device_create_file_fan(new_client, 1);
1226         device_create_file_fan(new_client, 2);
1227         device_create_file_fan(new_client, 3);
1228
1229         device_create_file_temp(new_client, 1);
1230         device_create_file_temp(new_client, 2);
1231         if (kind != w83783s)
1232                 device_create_file_temp(new_client, 3);
1233
1234         device_create_file_vid(new_client);
1235         device_create_file_vrm(new_client);
1236
1237         device_create_file_fan_div(new_client, 1);
1238         device_create_file_fan_div(new_client, 2);
1239         device_create_file_fan_div(new_client, 3);
1240
1241         device_create_file_alarms(new_client);
1242
1243         device_create_file_beep(new_client);
1244
1245         if (kind != w83781d && kind != as99127f) {
1246                 device_create_file_pwm(new_client, 1);
1247                 device_create_file_pwm(new_client, 2);
1248                 device_create_file_pwmenable(new_client, 2);
1249         }
1250         if (kind == w83782d && !is_isa) {
1251                 device_create_file_pwm(new_client, 3);
1252                 device_create_file_pwm(new_client, 4);
1253         }
1254
1255         if (kind != as99127f && kind != w83781d) {
1256                 device_create_file_sensor(new_client, 1);
1257                 device_create_file_sensor(new_client, 2);
1258                 if (kind != w83783s)
1259                         device_create_file_sensor(new_client, 3);
1260         }
1261
1262         return 0;
1263
1264 ERROR4:
1265         if (data->lm75[1]) {
1266                 i2c_detach_client(data->lm75[1]);
1267                 kfree(data->lm75[1]);
1268         }
1269         if (data->lm75[0]) {
1270                 i2c_detach_client(data->lm75[0]);
1271                 kfree(data->lm75[0]);
1272         }
1273 ERROR3:
1274         i2c_detach_client(new_client);
1275 ERROR2:
1276         kfree(data);
1277 ERROR1:
1278         if (is_isa)
1279                 release_region(address, W83781D_EXTENT);
1280 ERROR0:
1281         return err;
1282 }
1283
1284 static int
1285 w83781d_detach_client(struct i2c_client *client)
1286 {
1287         struct w83781d_data *data = i2c_get_clientdata(client);
1288         int err;
1289
1290         /* main client */
1291         if (data)
1292                 hwmon_device_unregister(data->class_dev);
1293
1294         if (i2c_is_isa_client(client))
1295                 release_region(client->addr, W83781D_EXTENT);
1296
1297         if ((err = i2c_detach_client(client)))
1298                 return err;
1299
1300         /* main client */
1301         if (data)
1302                 kfree(data);
1303
1304         /* subclient */
1305         else
1306                 kfree(client);
1307
1308         return 0;
1309 }
1310
1311 /* The SMBus locks itself, usually, but nothing may access the Winbond between
1312    bank switches. ISA access must always be locked explicitly!
1313    We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks,
1314    would slow down the W83781D access and should not be necessary.
1315    There are some ugly typecasts here, but the good news is - they should
1316    nowhere else be necessary! */
1317 static int
1318 w83781d_read_value(struct i2c_client *client, u16 reg)
1319 {
1320         struct w83781d_data *data = i2c_get_clientdata(client);
1321         int res, word_sized, bank;
1322         struct i2c_client *cl;
1323
1324         down(&data->lock);
1325         if (i2c_is_isa_client(client)) {
1326                 word_sized = (((reg & 0xff00) == 0x100)
1327                               || ((reg & 0xff00) == 0x200))
1328                     && (((reg & 0x00ff) == 0x50)
1329                         || ((reg & 0x00ff) == 0x53)
1330                         || ((reg & 0x00ff) == 0x55));
1331                 if (reg & 0xff00) {
1332                         outb_p(W83781D_REG_BANK,
1333                                client->addr + W83781D_ADDR_REG_OFFSET);
1334                         outb_p(reg >> 8,
1335                                client->addr + W83781D_DATA_REG_OFFSET);
1336                 }
1337                 outb_p(reg & 0xff, client->addr + W83781D_ADDR_REG_OFFSET);
1338                 res = inb_p(client->addr + W83781D_DATA_REG_OFFSET);
1339                 if (word_sized) {
1340                         outb_p((reg & 0xff) + 1,
1341                                client->addr + W83781D_ADDR_REG_OFFSET);
1342                         res =
1343                             (res << 8) + inb_p(client->addr +
1344                                                W83781D_DATA_REG_OFFSET);
1345                 }
1346                 if (reg & 0xff00) {
1347                         outb_p(W83781D_REG_BANK,
1348                                client->addr + W83781D_ADDR_REG_OFFSET);
1349                         outb_p(0, client->addr + W83781D_DATA_REG_OFFSET);
1350                 }
1351         } else {
1352                 bank = (reg >> 8) & 0x0f;
1353                 if (bank > 2)
1354                         /* switch banks */
1355                         i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1356                                                   bank);
1357                 if (bank == 0 || bank > 2) {
1358                         res = i2c_smbus_read_byte_data(client, reg & 0xff);
1359                 } else {
1360                         /* switch to subclient */
1361                         cl = data->lm75[bank - 1];
1362                         /* convert from ISA to LM75 I2C addresses */
1363                         switch (reg & 0xff) {
1364                         case 0x50:      /* TEMP */
1365                                 res = swab16(i2c_smbus_read_word_data(cl, 0));
1366                                 break;
1367                         case 0x52:      /* CONFIG */
1368                                 res = i2c_smbus_read_byte_data(cl, 1);
1369                                 break;
1370                         case 0x53:      /* HYST */
1371                                 res = swab16(i2c_smbus_read_word_data(cl, 2));
1372                                 break;
1373                         case 0x55:      /* OVER */
1374                         default:
1375                                 res = swab16(i2c_smbus_read_word_data(cl, 3));
1376                                 break;
1377                         }
1378                 }
1379                 if (bank > 2)
1380                         i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1381         }
1382         up(&data->lock);
1383         return res;
1384 }
1385
1386 static int
1387 w83781d_write_value(struct i2c_client *client, u16 reg, u16 value)
1388 {
1389         struct w83781d_data *data = i2c_get_clientdata(client);
1390         int word_sized, bank;
1391         struct i2c_client *cl;
1392
1393         down(&data->lock);
1394         if (i2c_is_isa_client(client)) {
1395                 word_sized = (((reg & 0xff00) == 0x100)
1396                               || ((reg & 0xff00) == 0x200))
1397                     && (((reg & 0x00ff) == 0x53)
1398                         || ((reg & 0x00ff) == 0x55));
1399                 if (reg & 0xff00) {
1400                         outb_p(W83781D_REG_BANK,
1401                                client->addr + W83781D_ADDR_REG_OFFSET);
1402                         outb_p(reg >> 8,
1403                                client->addr + W83781D_DATA_REG_OFFSET);
1404                 }
1405                 outb_p(reg & 0xff, client->addr + W83781D_ADDR_REG_OFFSET);
1406                 if (word_sized) {
1407                         outb_p(value >> 8,
1408                                client->addr + W83781D_DATA_REG_OFFSET);
1409                         outb_p((reg & 0xff) + 1,
1410                                client->addr + W83781D_ADDR_REG_OFFSET);
1411                 }
1412                 outb_p(value & 0xff, client->addr + W83781D_DATA_REG_OFFSET);
1413                 if (reg & 0xff00) {
1414                         outb_p(W83781D_REG_BANK,
1415                                client->addr + W83781D_ADDR_REG_OFFSET);
1416                         outb_p(0, client->addr + W83781D_DATA_REG_OFFSET);
1417                 }
1418         } else {
1419                 bank = (reg >> 8) & 0x0f;
1420                 if (bank > 2)
1421                         /* switch banks */
1422                         i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1423                                                   bank);
1424                 if (bank == 0 || bank > 2) {
1425                         i2c_smbus_write_byte_data(client, reg & 0xff,
1426                                                   value & 0xff);
1427                 } else {
1428                         /* switch to subclient */
1429                         cl = data->lm75[bank - 1];
1430                         /* convert from ISA to LM75 I2C addresses */
1431                         switch (reg & 0xff) {
1432                         case 0x52:      /* CONFIG */
1433                                 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
1434                                 break;
1435                         case 0x53:      /* HYST */
1436                                 i2c_smbus_write_word_data(cl, 2, swab16(value));
1437                                 break;
1438                         case 0x55:      /* OVER */
1439                                 i2c_smbus_write_word_data(cl, 3, swab16(value));
1440                                 break;
1441                         }
1442                 }
1443                 if (bank > 2)
1444                         i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1445         }
1446         up(&data->lock);
1447         return 0;
1448 }
1449
1450 static void
1451 w83781d_init_client(struct i2c_client *client)
1452 {
1453         struct w83781d_data *data = i2c_get_clientdata(client);
1454         int i, p;
1455         int type = data->type;
1456         u8 tmp;
1457
1458         if (init && type != as99127f) { /* this resets registers we don't have
1459                                            documentation for on the as99127f */
1460                 /* save these registers */
1461                 i = w83781d_read_value(client, W83781D_REG_BEEP_CONFIG);
1462                 p = w83781d_read_value(client, W83781D_REG_PWMCLK12);
1463                 /* Reset all except Watchdog values and last conversion values
1464                    This sets fan-divs to 2, among others */
1465                 w83781d_write_value(client, W83781D_REG_CONFIG, 0x80);
1466                 /* Restore the registers and disable power-on abnormal beep.
1467                    This saves FAN 1/2/3 input/output values set by BIOS. */
1468                 w83781d_write_value(client, W83781D_REG_BEEP_CONFIG, i | 0x80);
1469                 w83781d_write_value(client, W83781D_REG_PWMCLK12, p);
1470                 /* Disable master beep-enable (reset turns it on).
1471                    Individual beep_mask should be reset to off but for some reason
1472                    disabling this bit helps some people not get beeped */
1473                 w83781d_write_value(client, W83781D_REG_BEEP_INTS2, 0);
1474         }
1475
1476         data->vrm = vid_which_vrm();
1477
1478         if ((type != w83781d) && (type != as99127f)) {
1479                 tmp = w83781d_read_value(client, W83781D_REG_SCFG1);
1480                 for (i = 1; i <= 3; i++) {
1481                         if (!(tmp & BIT_SCFG1[i - 1])) {
1482                                 data->sens[i - 1] = W83781D_DEFAULT_BETA;
1483                         } else {
1484                                 if (w83781d_read_value
1485                                     (client,
1486                                      W83781D_REG_SCFG2) & BIT_SCFG2[i - 1])
1487                                         data->sens[i - 1] = 1;
1488                                 else
1489                                         data->sens[i - 1] = 2;
1490                         }
1491                         if (type == w83783s && i == 2)
1492                                 break;
1493                 }
1494         }
1495
1496         if (init && type != as99127f) {
1497                 /* Enable temp2 */
1498                 tmp = w83781d_read_value(client, W83781D_REG_TEMP2_CONFIG);
1499                 if (tmp & 0x01) {
1500                         dev_warn(&client->dev, "Enabling temp2, readings "
1501                                  "might not make sense\n");
1502                         w83781d_write_value(client, W83781D_REG_TEMP2_CONFIG,
1503                                 tmp & 0xfe);
1504                 }
1505
1506                 /* Enable temp3 */
1507                 if (type != w83783s) {
1508                         tmp = w83781d_read_value(client,
1509                                 W83781D_REG_TEMP3_CONFIG);
1510                         if (tmp & 0x01) {
1511                                 dev_warn(&client->dev, "Enabling temp3, "
1512                                          "readings might not make sense\n");
1513                                 w83781d_write_value(client,
1514                                         W83781D_REG_TEMP3_CONFIG, tmp & 0xfe);
1515                         }
1516                 }
1517
1518                 if (type != w83781d) {
1519                         /* enable comparator mode for temp2 and temp3 so
1520                            alarm indication will work correctly */
1521                         i = w83781d_read_value(client, W83781D_REG_IRQ);
1522                         if (!(i & 0x40))
1523                                 w83781d_write_value(client, W83781D_REG_IRQ,
1524                                                     i | 0x40);
1525                 }
1526         }
1527
1528         /* Start monitoring */
1529         w83781d_write_value(client, W83781D_REG_CONFIG,
1530                             (w83781d_read_value(client,
1531                                                 W83781D_REG_CONFIG) & 0xf7)
1532                             | 0x01);
1533 }
1534
1535 static struct w83781d_data *w83781d_update_device(struct device *dev)
1536 {
1537         struct i2c_client *client = to_i2c_client(dev);
1538         struct w83781d_data *data = i2c_get_clientdata(client);
1539         int i;
1540
1541         down(&data->update_lock);
1542
1543         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1544             || !data->valid) {
1545                 dev_dbg(dev, "Starting device update\n");
1546
1547                 for (i = 0; i <= 8; i++) {
1548                         if (data->type == w83783s && i == 1)
1549                                 continue;       /* 783S has no in1 */
1550                         data->in[i] =
1551                             w83781d_read_value(client, W83781D_REG_IN(i));
1552                         data->in_min[i] =
1553                             w83781d_read_value(client, W83781D_REG_IN_MIN(i));
1554                         data->in_max[i] =
1555                             w83781d_read_value(client, W83781D_REG_IN_MAX(i));
1556                         if ((data->type != w83782d)
1557                             && (data->type != w83627hf) && (i == 6))
1558                                 break;
1559                 }
1560                 for (i = 1; i <= 3; i++) {
1561                         data->fan[i - 1] =
1562                             w83781d_read_value(client, W83781D_REG_FAN(i));
1563                         data->fan_min[i - 1] =
1564                             w83781d_read_value(client, W83781D_REG_FAN_MIN(i));
1565                 }
1566                 if (data->type != w83781d && data->type != as99127f) {
1567                         for (i = 1; i <= 4; i++) {
1568                                 data->pwm[i - 1] =
1569                                     w83781d_read_value(client,
1570                                                        W83781D_REG_PWM(i));
1571                                 if ((data->type != w83782d
1572                                      || i2c_is_isa_client(client))
1573                                     && i == 2)
1574                                         break;
1575                         }
1576                         /* Only PWM2 can be disabled */
1577                         data->pwmenable[1] = (w83781d_read_value(client,
1578                                               W83781D_REG_PWMCLK12) & 0x08) >> 3;
1579                 }
1580
1581                 data->temp = w83781d_read_value(client, W83781D_REG_TEMP(1));
1582                 data->temp_max =
1583                     w83781d_read_value(client, W83781D_REG_TEMP_OVER(1));
1584                 data->temp_max_hyst =
1585                     w83781d_read_value(client, W83781D_REG_TEMP_HYST(1));
1586                 data->temp_add[0] =
1587                     w83781d_read_value(client, W83781D_REG_TEMP(2));
1588                 data->temp_max_add[0] =
1589                     w83781d_read_value(client, W83781D_REG_TEMP_OVER(2));
1590                 data->temp_max_hyst_add[0] =
1591                     w83781d_read_value(client, W83781D_REG_TEMP_HYST(2));
1592                 if (data->type != w83783s) {
1593                         data->temp_add[1] =
1594                             w83781d_read_value(client, W83781D_REG_TEMP(3));
1595                         data->temp_max_add[1] =
1596                             w83781d_read_value(client,
1597                                                W83781D_REG_TEMP_OVER(3));
1598                         data->temp_max_hyst_add[1] =
1599                             w83781d_read_value(client,
1600                                                W83781D_REG_TEMP_HYST(3));
1601                 }
1602                 i = w83781d_read_value(client, W83781D_REG_VID_FANDIV);
1603                 data->vid = i & 0x0f;
1604                 data->vid |= (w83781d_read_value(client,
1605                                         W83781D_REG_CHIPID) & 0x01) << 4;
1606                 data->fan_div[0] = (i >> 4) & 0x03;
1607                 data->fan_div[1] = (i >> 6) & 0x03;
1608                 data->fan_div[2] = (w83781d_read_value(client,
1609                                         W83781D_REG_PIN) >> 6) & 0x03;
1610                 if ((data->type != w83781d) && (data->type != as99127f)) {
1611                         i = w83781d_read_value(client, W83781D_REG_VBAT);
1612                         data->fan_div[0] |= (i >> 3) & 0x04;
1613                         data->fan_div[1] |= (i >> 4) & 0x04;
1614                         data->fan_div[2] |= (i >> 5) & 0x04;
1615                 }
1616                 data->alarms =
1617                     w83781d_read_value(client,
1618                                        W83781D_REG_ALARM1) +
1619                     (w83781d_read_value(client, W83781D_REG_ALARM2) << 8);
1620                 if ((data->type == w83782d) || (data->type == w83627hf)) {
1621                         data->alarms |=
1622                             w83781d_read_value(client,
1623                                                W83781D_REG_ALARM3) << 16;
1624                 }
1625                 i = w83781d_read_value(client, W83781D_REG_BEEP_INTS2);
1626                 data->beep_enable = i >> 7;
1627                 data->beep_mask = ((i & 0x7f) << 8) +
1628                     w83781d_read_value(client, W83781D_REG_BEEP_INTS1);
1629                 if ((data->type != w83781d) && (data->type != as99127f)) {
1630                         data->beep_mask |=
1631                             w83781d_read_value(client,
1632                                                W83781D_REG_BEEP_INTS3) << 16;
1633                 }
1634                 data->last_updated = jiffies;
1635                 data->valid = 1;
1636         }
1637
1638         up(&data->update_lock);
1639
1640         return data;
1641 }
1642
1643 static int __init
1644 sensors_w83781d_init(void)
1645 {
1646         int res;
1647
1648         res = i2c_add_driver(&w83781d_driver);
1649         if (res)
1650                 return res;
1651
1652         res = i2c_isa_add_driver(&w83781d_isa_driver);
1653         if (res) {
1654                 i2c_del_driver(&w83781d_driver);
1655                 return res;
1656         }
1657
1658         return 0;
1659 }
1660
1661 static void __exit
1662 sensors_w83781d_exit(void)
1663 {
1664         i2c_isa_del_driver(&w83781d_isa_driver);
1665         i2c_del_driver(&w83781d_driver);
1666 }
1667
1668 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
1669               "Philip Edelbrock <phil@netroedge.com>, "
1670               "and Mark Studebaker <mdsxyz123@yahoo.com>");
1671 MODULE_DESCRIPTION("W83781D driver");
1672 MODULE_LICENSE("GPL");
1673
1674 module_init(sensors_w83781d_init);
1675 module_exit(sensors_w83781d_exit);