drivers/hwmon/w83781d.c

   1 /*
   2  * w83781d.c - Part of lm_sensors, Linux kernel modules for hardware
   3  *             monitoring
   4  * Copyright (c) 1998 - 2001  Frodo Looijaard <frodol@dds.nl>,
   5  *                            Philip Edelbrock <phil@netroedge.com>,
   6  *                            and Mark Studebaker <mdsxyz123@yahoo.com>
   7  * Copyright (c) 2007 - 2008  Jean Delvare <jdelvare@suse.de>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24 /*
  25  * Supports following chips:
  26  *
  27  * Chip         #vin    #fanin  #pwm    #temp   wchipid vendid  i2c     ISA
  28  * as99127f     7       3       0       3       0x31    0x12c3  yes     no
  29  * as99127f rev.2 (type_name = as99127f)        0x31    0x5ca3  yes     no
  30  * w83781d      7       3       0       3       0x10-1  0x5ca3  yes     yes
  31  * w83782d      9       3       2-4     3       0x30    0x5ca3  yes     yes
  32  * w83783s      5-6     3       2       1-2     0x40    0x5ca3  yes     no
  33  *
  34  */
  35
  36 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  37
  38 #include <linux/module.h>
  39 #include <linux/init.h>
  40 #include <linux/slab.h>
  41 #include <linux/jiffies.h>
  42 #include <linux/i2c.h>
  43 #include <linux/hwmon.h>
  44 #include <linux/hwmon-vid.h>
  45 #include <linux/hwmon-sysfs.h>
  46 #include <linux/sysfs.h>
  47 #include <linux/err.h>
  48 #include <linux/mutex.h>
  49
  50 #ifdef CONFIG_ISA
  51 #include <linux/platform_device.h>
  52 #include <linux/ioport.h>
  53 #include <linux/io.h>
  54 #endif
  55
  56 #include "lm75.h"
  57
  58 /* Addresses to scan */
  59 static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
  60                                                 0x2e, 0x2f, I2C_CLIENT_END };
  61
  62 enum chips { w83781d, w83782d, w83783s, as99127f };
  63
  64 /* Insmod parameters */
  65 static unsigned short force_subclients[4];
  66 module_param_array(force_subclients, short, NULL, 0);
  67 MODULE_PARM_DESC(force_subclients,
  68                  "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");
  69
  70 static bool reset;
  71 module_param(reset, bool, 0);
  72 MODULE_PARM_DESC(reset, "Set to one to reset chip on load");
  73
  74 static bool init = 1;
  75 module_param(init, bool, 0);
  76 MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization");
  77
  78 /* Constants specified below */
  79
  80 /* Length of ISA address segment */
  81 #define W83781D_EXTENT                  8
  82
  83 /* Where are the ISA address/data registers relative to the base address */
  84 #define W83781D_ADDR_REG_OFFSET         5
  85 #define W83781D_DATA_REG_OFFSET         6
  86
  87 /* The device registers */
  88 /* in nr from 0 to 8 */
  89 #define W83781D_REG_IN_MAX(nr)          ((nr < 7) ? (0x2b + (nr) * 2) : \
  90                                                     (0x554 + (((nr) - 7) * 2)))
  91 #define W83781D_REG_IN_MIN(nr)          ((nr < 7) ? (0x2c + (nr) * 2) : \
  92                                                     (0x555 + (((nr) - 7) * 2)))
  93 #define W83781D_REG_IN(nr)              ((nr < 7) ? (0x20 + (nr)) : \
  94                                                     (0x550 + (nr) - 7))
  95
  96 /* fan nr from 0 to 2 */
  97 #define W83781D_REG_FAN_MIN(nr)         (0x3b + (nr))
  98 #define W83781D_REG_FAN(nr)             (0x28 + (nr))
  99
 100 #define W83781D_REG_BANK                0x4E
 101 #define W83781D_REG_TEMP2_CONFIG        0x152
 102 #define W83781D_REG_TEMP3_CONFIG        0x252
 103 /* temp nr from 1 to 3 */
 104 #define W83781D_REG_TEMP(nr)            ((nr == 3) ? (0x0250) : \
 105                                         ((nr == 2) ? (0x0150) : \
 106                                                      (0x27)))
 107 #define W83781D_REG_TEMP_HYST(nr)       ((nr == 3) ? (0x253) : \
 108                                         ((nr == 2) ? (0x153) : \
 109                                                      (0x3A)))
 110 #define W83781D_REG_TEMP_OVER(nr)       ((nr == 3) ? (0x255) : \
 111                                         ((nr == 2) ? (0x155) : \
 112                                                      (0x39)))
 113
 114 #define W83781D_REG_CONFIG              0x40
 115
 116 /* Interrupt status (W83781D, AS99127F) */
 117 #define W83781D_REG_ALARM1              0x41
 118 #define W83781D_REG_ALARM2              0x42
 119
 120 /* Real-time status (W83782D, W83783S) */
 121 #define W83782D_REG_ALARM1              0x459
 122 #define W83782D_REG_ALARM2              0x45A
 123 #define W83782D_REG_ALARM3              0x45B
 124
 125 #define W83781D_REG_BEEP_CONFIG         0x4D
 126 #define W83781D_REG_BEEP_INTS1          0x56
 127 #define W83781D_REG_BEEP_INTS2          0x57
 128 #define W83781D_REG_BEEP_INTS3          0x453   /* not on W83781D */
 129
 130 #define W83781D_REG_VID_FANDIV          0x47
 131
 132 #define W83781D_REG_CHIPID              0x49
 133 #define W83781D_REG_WCHIPID             0x58
 134 #define W83781D_REG_CHIPMAN             0x4F
 135 #define W83781D_REG_PIN                 0x4B
 136
 137 /* 782D/783S only */
 138 #define W83781D_REG_VBAT                0x5D
 139
 140 /* PWM 782D (1-4) and 783S (1-2) only */
 141 static const u8 W83781D_REG_PWM[] = { 0x5B, 0x5A, 0x5E, 0x5F };
 142 #define W83781D_REG_PWMCLK12            0x5C
 143 #define W83781D_REG_PWMCLK34            0x45C
 144
 145 #define W83781D_REG_I2C_ADDR            0x48
 146 #define W83781D_REG_I2C_SUBADDR         0x4A
 147
 148 /*
 149  * The following are undocumented in the data sheets however we
 150  * received the information in an email from Winbond tech support
 151  */
 152 /* Sensor selection - not on 781d */
 153 #define W83781D_REG_SCFG1               0x5D
 154 static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 };
 155
 156 #define W83781D_REG_SCFG2               0x59
 157 static const u8 BIT_SCFG2[] = { 0x10, 0x20, 0x40 };
 158
 159 #define W83781D_DEFAULT_BETA            3435
 160
 161 /* Conversions */
 162 #define IN_TO_REG(val)                  clamp_val(((val) + 8) / 16, 0, 255)
 163 #define IN_FROM_REG(val)                ((val) * 16)
 164
 165 static inline u8
 166 FAN_TO_REG(long rpm, int div)
 167 {
 168         if (rpm == 0)
 169                 return 255;
 170         rpm = clamp_val(rpm, 1, 1000000);
 171         return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
 172 }
 173
 174 static inline long
 175 FAN_FROM_REG(u8 val, int div)
 176 {
 177         if (val == 0)
 178                 return -1;
 179         if (val == 255)
 180                 return 0;
 181         return 1350000 / (val * div);
 182 }
 183
 184 #define TEMP_TO_REG(val)                clamp_val((val) / 1000, -127, 128)
 185 #define TEMP_FROM_REG(val)              ((val) * 1000)
 186
 187 #define BEEP_MASK_FROM_REG(val, type)   ((type) == as99127f ? \
 188                                          (~(val)) & 0x7fff : (val) & 0xff7fff)
 189 #define BEEP_MASK_TO_REG(val, type)     ((type) == as99127f ? \
 190                                          (~(val)) & 0x7fff : (val) & 0xff7fff)
 191
 192 #define DIV_FROM_REG(val)               (1 << (val))
 193
 194 static inline u8
 195 DIV_TO_REG(long val, enum chips type)
 196 {
 197         int i;
 198         val = clamp_val(val, 1,
 199                         ((type == w83781d || type == as99127f) ? 8 : 128)) >> 1;
 200         for (i = 0; i < 7; i++) {
 201                 if (val == 0)
 202                         break;
 203                 val >>= 1;
 204         }
 205         return i;
 206 }
 207
 208 struct w83781d_data {
 209         struct i2c_client *client;
 210         struct device *hwmon_dev;
 211         struct mutex lock;
 212         enum chips type;
 213
 214         /* For ISA device only */
 215         const char *name;
 216         int isa_addr;
 217
 218         struct mutex update_lock;
 219         char valid;             /* !=0 if following fields are valid */
 220         unsigned long last_updated;     /* In jiffies */
 221
 222         struct i2c_client *lm75[2];     /* for secondary I2C addresses */
 223         /* array of 2 pointers to subclients */
 224
 225         u8 in[9];               /* Register value - 8 & 9 for 782D only */
 226         u8 in_max[9];           /* Register value - 8 & 9 for 782D only */
 227         u8 in_min[9];           /* Register value - 8 & 9 for 782D only */
 228         u8 fan[3];              /* Register value */
 229         u8 fan_min[3];          /* Register value */
 230         s8 temp;                /* Register value */
 231         s8 temp_max;            /* Register value */
 232         s8 temp_max_hyst;       /* Register value */
 233         u16 temp_add[2];        /* Register value */
 234         u16 temp_max_add[2];    /* Register value */
 235         u16 temp_max_hyst_add[2];       /* Register value */
 236         u8 fan_div[3];          /* Register encoding, shifted right */
 237         u8 vid;                 /* Register encoding, combined */
 238         u32 alarms;             /* Register encoding, combined */
 239         u32 beep_mask;          /* Register encoding, combined */
 240         u8 pwm[4];              /* Register value */
 241         u8 pwm2_enable;         /* Boolean */
 242         u16 sens[3];            /*
 243                                  * 782D/783S only.
 244                                  * 1 = pentium diode; 2 = 3904 diode;
 245                                  * 4 = thermistor
 246                                  */
 247         u8 vrm;
 248 };
 249
 250 static struct w83781d_data *w83781d_data_if_isa(void);
 251 static int w83781d_alias_detect(struct i2c_client *client, u8 chipid);
 252
 253 static int w83781d_read_value(struct w83781d_data *data, u16 reg);
 254 static int w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value);
 255 static struct w83781d_data *w83781d_update_device(struct device *dev);
 256 static void w83781d_init_device(struct device *dev);
 257
 258 /* following are the sysfs callback functions */
 259 #define show_in_reg(reg) \
 260 static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \
 261                 char *buf) \
 262 { \
 263         struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 264         struct w83781d_data *data = w83781d_update_device(dev); \
 265         return sprintf(buf, "%ld\n", \
 266                        (long)IN_FROM_REG(data->reg[attr->index])); \
 267 }
 268 show_in_reg(in);
 269 show_in_reg(in_min);
 270 show_in_reg(in_max);
 271
 272 #define store_in_reg(REG, reg) \
 273 static ssize_t store_in_##reg(struct device *dev, struct device_attribute \
 274                 *da, const char *buf, size_t count) \
 275 { \
 276         struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 277         struct w83781d_data *data = dev_get_drvdata(dev); \
 278         int nr = attr->index; \
 279         unsigned long val; \
 280         int err = kstrtoul(buf, 10, &val); \
 281         if (err) \
 282                 return err; \
 283         mutex_lock(&data->update_lock); \
 284         data->in_##reg[nr] = IN_TO_REG(val); \
 285         w83781d_write_value(data, W83781D_REG_IN_##REG(nr), \
 286                             data->in_##reg[nr]); \
 287         \
 288         mutex_unlock(&data->update_lock); \
 289         return count; \
 290 }
 291 store_in_reg(MIN, min);
 292 store_in_reg(MAX, max);
 293
 294 #define sysfs_in_offsets(offset) \
 295 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
 296                 show_in, NULL, offset); \
 297 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
 298                 show_in_min, store_in_min, offset); \
 299 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
 300                 show_in_max, store_in_max, offset)
 301
 302 sysfs_in_offsets(0);
 303 sysfs_in_offsets(1);
 304 sysfs_in_offsets(2);
 305 sysfs_in_offsets(3);
 306 sysfs_in_offsets(4);
 307 sysfs_in_offsets(5);
 308 sysfs_in_offsets(6);
 309 sysfs_in_offsets(7);
 310 sysfs_in_offsets(8);
 311
 312 #define show_fan_reg(reg) \
 313 static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \
 314                 char *buf) \
 315 { \
 316         struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 317         struct w83781d_data *data = w83781d_update_device(dev); \
 318         return sprintf(buf, "%ld\n", \
 319                 FAN_FROM_REG(data->reg[attr->index], \
 320                         DIV_FROM_REG(data->fan_div[attr->index]))); \
 321 }
 322 show_fan_reg(fan);
 323 show_fan_reg(fan_min);
 324
 325 static ssize_t
 326 store_fan_min(struct device *dev, struct device_attribute *da,
 327                 const char *buf, size_t count)
 328 {
 329         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 330         struct w83781d_data *data = dev_get_drvdata(dev);
 331         int nr = attr->index;
 332         unsigned long val;
 333         int err;
 334
 335         err = kstrtoul(buf, 10, &val);
 336         if (err)
 337                 return err;
 338
 339         mutex_lock(&data->update_lock);
 340         data->fan_min[nr] =
 341             FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 342         w83781d_write_value(data, W83781D_REG_FAN_MIN(nr),
 343                             data->fan_min[nr]);
 344
 345         mutex_unlock(&data->update_lock);
 346         return count;
 347 }
 348
 349 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 350 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
 351                 show_fan_min, store_fan_min, 0);
 352 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
 353 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
 354                 show_fan_min, store_fan_min, 1);
 355 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
 356 static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO | S_IWUSR,
 357                 show_fan_min, store_fan_min, 2);
 358
 359 #define show_temp_reg(reg) \
 360 static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \
 361                 char *buf) \
 362 { \
 363         struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 364         struct w83781d_data *data = w83781d_update_device(dev); \
 365         int nr = attr->index; \
 366         if (nr >= 2) {  /* TEMP2 and TEMP3 */ \
 367                 return sprintf(buf, "%d\n", \
 368                         LM75_TEMP_FROM_REG(data->reg##_add[nr-2])); \
 369         } else {        /* TEMP1 */ \
 370                 return sprintf(buf, "%ld\n", (long)TEMP_FROM_REG(data->reg)); \
 371         } \
 372 }
 373 show_temp_reg(temp);
 374 show_temp_reg(temp_max);
 375 show_temp_reg(temp_max_hyst);
 376
 377 #define store_temp_reg(REG, reg) \
 378 static ssize_t store_temp_##reg(struct device *dev, \
 379                 struct device_attribute *da, const char *buf, size_t count) \
 380 { \
 381         struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 382         struct w83781d_data *data = dev_get_drvdata(dev); \
 383         int nr = attr->index; \
 384         long val; \
 385         int err = kstrtol(buf, 10, &val); \
 386         if (err) \
 387                 return err; \
 388         mutex_lock(&data->update_lock); \
 389          \
 390         if (nr >= 2) {  /* TEMP2 and TEMP3 */ \
 391                 data->temp_##reg##_add[nr-2] = LM75_TEMP_TO_REG(val); \
 392                 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \
 393                                 data->temp_##reg##_add[nr-2]); \
 394         } else {        /* TEMP1 */ \
 395                 data->temp_##reg = TEMP_TO_REG(val); \
 396                 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \
 397                         data->temp_##reg); \
 398         } \
 399          \
 400         mutex_unlock(&data->update_lock); \
 401         return count; \
 402 }
 403 store_temp_reg(OVER, max);
 404 store_temp_reg(HYST, max_hyst);
 405
 406 #define sysfs_temp_offsets(offset) \
 407 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
 408                 show_temp, NULL, offset); \
 409 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
 410                 show_temp_max, store_temp_max, offset); \
 411 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
 412                 show_temp_max_hyst, store_temp_max_hyst, offset);
 413
 414 sysfs_temp_offsets(1);
 415 sysfs_temp_offsets(2);
 416 sysfs_temp_offsets(3);
 417
 418 static ssize_t
 419 cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf)
 420 {
 421         struct w83781d_data *data = w83781d_update_device(dev);
 422         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
 423 }
 424
 425 static DEVICE_ATTR_RO(cpu0_vid);
 426
 427 static ssize_t
 428 vrm_show(struct device *dev, struct device_attribute *attr, char *buf)
 429 {
 430         struct w83781d_data *data = dev_get_drvdata(dev);
 431         return sprintf(buf, "%ld\n", (long) data->vrm);
 432 }
 433
 434 static ssize_t
 435 vrm_store(struct device *dev, struct device_attribute *attr, const char *buf,
 436           size_t count)
 437 {
 438         struct w83781d_data *data = dev_get_drvdata(dev);
 439         unsigned long val;
 440         int err;
 441
 442         err = kstrtoul(buf, 10, &val);
 443         if (err)
 444                 return err;
 445         data->vrm = clamp_val(val, 0, 255);
 446
 447         return count;
 448 }
 449
 450 static DEVICE_ATTR_RW(vrm);
 451
 452 static ssize_t
 453 alarms_show(struct device *dev, struct device_attribute *attr, char *buf)
 454 {
 455         struct w83781d_data *data = w83781d_update_device(dev);
 456         return sprintf(buf, "%u\n", data->alarms);
 457 }
 458
 459 static DEVICE_ATTR_RO(alarms);
 460
 461 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
 462                 char *buf)
 463 {
 464         struct w83781d_data *data = w83781d_update_device(dev);
 465         int bitnr = to_sensor_dev_attr(attr)->index;
 466         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 467 }
 468
 469 /* The W83781D has a single alarm bit for temp2 and temp3 */
 470 static ssize_t show_temp3_alarm(struct device *dev,
 471                 struct device_attribute *attr, char *buf)
 472 {
 473         struct w83781d_data *data = w83781d_update_device(dev);
 474         int bitnr = (data->type == w83781d) ? 5 : 13;
 475         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 476 }
 477
 478 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 479 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 480 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 481 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 482 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
 483 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
 484 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10);
 485 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 16);
 486 static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 17);
 487 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
 488 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
 489 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11);
 490 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
 491 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
 492 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_temp3_alarm, NULL, 0);
 493
 494 static ssize_t beep_mask_show(struct device *dev,
 495                                struct device_attribute *attr, char *buf)
 496 {
 497         struct w83781d_data *data = w83781d_update_device(dev);
 498         return sprintf(buf, "%ld\n",
 499                        (long)BEEP_MASK_FROM_REG(data->beep_mask, data->type));
 500 }
 501
 502 static ssize_t
 503 beep_mask_store(struct device *dev, struct device_attribute *attr,
 504                 const char *buf, size_t count)
 505 {
 506         struct w83781d_data *data = dev_get_drvdata(dev);
 507         unsigned long val;
 508         int err;
 509
 510         err = kstrtoul(buf, 10, &val);
 511         if (err)
 512                 return err;
 513
 514         mutex_lock(&data->update_lock);
 515         data->beep_mask &= 0x8000; /* preserve beep enable */
 516         data->beep_mask |= BEEP_MASK_TO_REG(val, data->type);
 517         w83781d_write_value(data, W83781D_REG_BEEP_INTS1,
 518                             data->beep_mask & 0xff);
 519         w83781d_write_value(data, W83781D_REG_BEEP_INTS2,
 520                             (data->beep_mask >> 8) & 0xff);
 521         if (data->type != w83781d && data->type != as99127f) {
 522                 w83781d_write_value(data, W83781D_REG_BEEP_INTS3,
 523                                     ((data->beep_mask) >> 16) & 0xff);
 524         }
 525         mutex_unlock(&data->update_lock);
 526
 527         return count;
 528 }
 529
 530 static DEVICE_ATTR_RW(beep_mask);
 531
 532 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
 533                 char *buf)
 534 {
 535         struct w83781d_data *data = w83781d_update_device(dev);
 536         int bitnr = to_sensor_dev_attr(attr)->index;
 537         return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
 538 }
 539
 540 static ssize_t
 541 store_beep(struct device *dev, struct device_attribute *attr,
 542                 const char *buf, size_t count)
 543 {
 544         struct w83781d_data *data = dev_get_drvdata(dev);
 545         int bitnr = to_sensor_dev_attr(attr)->index;
 546         u8 reg;
 547         unsigned long bit;
 548         int err;
 549
 550         err = kstrtoul(buf, 10, &bit);
 551         if (err)
 552                 return err;
 553
 554         if (bit & ~1)
 555                 return -EINVAL;
 556
 557         mutex_lock(&data->update_lock);
 558         if (bit)
 559                 data->beep_mask |= (1 << bitnr);
 560         else
 561                 data->beep_mask &= ~(1 << bitnr);
 562
 563         if (bitnr < 8) {
 564                 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS1);
 565                 if (bit)
 566                         reg |= (1 << bitnr);
 567                 else
 568                         reg &= ~(1 << bitnr);
 569                 w83781d_write_value(data, W83781D_REG_BEEP_INTS1, reg);
 570         } else if (bitnr < 16) {
 571                 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS2);
 572                 if (bit)
 573                         reg |= (1 << (bitnr - 8));
 574                 else
 575                         reg &= ~(1 << (bitnr - 8));
 576                 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, reg);
 577         } else {
 578                 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS3);
 579                 if (bit)
 580                         reg |= (1 << (bitnr - 16));
 581                 else
 582                         reg &= ~(1 << (bitnr - 16));
 583                 w83781d_write_value(data, W83781D_REG_BEEP_INTS3, reg);
 584         }
 585         mutex_unlock(&data->update_lock);
 586
 587         return count;
 588 }
 589
 590 /* The W83781D has a single beep bit for temp2 and temp3 */
 591 static ssize_t show_temp3_beep(struct device *dev,
 592                 struct device_attribute *attr, char *buf)
 593 {
 594         struct w83781d_data *data = w83781d_update_device(dev);
 595         int bitnr = (data->type == w83781d) ? 5 : 13;
 596         return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
 597 }
 598
 599 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
 600                         show_beep, store_beep, 0);
 601 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR,
 602                         show_beep, store_beep, 1);
 603 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR,
 604                         show_beep, store_beep, 2);
 605 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR,
 606                         show_beep, store_beep, 3);
 607 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR,
 608                         show_beep, store_beep, 8);
 609 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO | S_IWUSR,
 610                         show_beep, store_beep, 9);
 611 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO | S_IWUSR,
 612                         show_beep, store_beep, 10);
 613 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO | S_IWUSR,
 614                         show_beep, store_beep, 16);
 615 static SENSOR_DEVICE_ATTR(in8_beep, S_IRUGO | S_IWUSR,
 616                         show_beep, store_beep, 17);
 617 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR,
 618                         show_beep, store_beep, 6);
 619 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR,
 620                         show_beep, store_beep, 7);
 621 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO | S_IWUSR,
 622                         show_beep, store_beep, 11);
 623 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
 624                         show_beep, store_beep, 4);
 625 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR,
 626                         show_beep, store_beep, 5);
 627 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO,
 628                         show_temp3_beep, store_beep, 13);
 629 static SENSOR_DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
 630                         show_beep, store_beep, 15);
 631
 632 static ssize_t
 633 show_fan_div(struct device *dev, struct device_attribute *da, char *buf)
 634 {
 635         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 636         struct w83781d_data *data = w83781d_update_device(dev);
 637         return sprintf(buf, "%ld\n",
 638                        (long) DIV_FROM_REG(data->fan_div[attr->index]));
 639 }
 640
 641 /*
 642  * Note: we save and restore the fan minimum here, because its value is
 643  * determined in part by the fan divisor.  This follows the principle of
 644  * least surprise; the user doesn't expect the fan minimum to change just
 645  * because the divisor changed.
 646  */
 647 static ssize_t
 648 store_fan_div(struct device *dev, struct device_attribute *da,
 649                 const char *buf, size_t count)
 650 {
 651         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 652         struct w83781d_data *data = dev_get_drvdata(dev);
 653         unsigned long min;
 654         int nr = attr->index;
 655         u8 reg;
 656         unsigned long val;
 657         int err;
 658
 659         err = kstrtoul(buf, 10, &val);
 660         if (err)
 661                 return err;
 662
 663         mutex_lock(&data->update_lock);
 664
 665         /* Save fan_min */
 666         min = FAN_FROM_REG(data->fan_min[nr],
 667                            DIV_FROM_REG(data->fan_div[nr]));
 668
 669         data->fan_div[nr] = DIV_TO_REG(val, data->type);
 670
 671         reg = (w83781d_read_value(data, nr == 2 ?
 672                                   W83781D_REG_PIN : W83781D_REG_VID_FANDIV)
 673                 & (nr == 0 ? 0xcf : 0x3f))
 674               | ((data->fan_div[nr] & 0x03) << (nr == 0 ? 4 : 6));
 675         w83781d_write_value(data, nr == 2 ?
 676                             W83781D_REG_PIN : W83781D_REG_VID_FANDIV, reg);
 677
 678         /* w83781d and as99127f don't have extended divisor bits */
 679         if (data->type != w83781d && data->type != as99127f) {
 680                 reg = (w83781d_read_value(data, W83781D_REG_VBAT)
 681                        & ~(1 << (5 + nr)))
 682                     | ((data->fan_div[nr] & 0x04) << (3 + nr));
 683                 w83781d_write_value(data, W83781D_REG_VBAT, reg);
 684         }
 685
 686         /* Restore fan_min */
 687         data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 688         w83781d_write_value(data, W83781D_REG_FAN_MIN(nr), data->fan_min[nr]);
 689
 690         mutex_unlock(&data->update_lock);
 691         return count;
 692 }
 693
 694 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
 695                 show_fan_div, store_fan_div, 0);
 696 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
 697                 show_fan_div, store_fan_div, 1);
 698 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR,
 699                 show_fan_div, store_fan_div, 2);
 700
 701 static ssize_t
 702 show_pwm(struct device *dev, struct device_attribute *da, char *buf)
 703 {
 704         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 705         struct w83781d_data *data = w83781d_update_device(dev);
 706         return sprintf(buf, "%d\n", (int)data->pwm[attr->index]);
 707 }
 708
 709 static ssize_t
 710 pwm2_enable_show(struct device *dev, struct device_attribute *da, char *buf)
 711 {
 712         struct w83781d_data *data = w83781d_update_device(dev);
 713         return sprintf(buf, "%d\n", (int)data->pwm2_enable);
 714 }
 715
 716 static ssize_t
 717 store_pwm(struct device *dev, struct device_attribute *da, const char *buf,
 718                 size_t count)
 719 {
 720         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 721         struct w83781d_data *data = dev_get_drvdata(dev);
 722         int nr = attr->index;
 723         unsigned long val;
 724         int err;
 725
 726         err = kstrtoul(buf, 10, &val);
 727         if (err)
 728                 return err;
 729
 730         mutex_lock(&data->update_lock);
 731         data->pwm[nr] = clamp_val(val, 0, 255);
 732         w83781d_write_value(data, W83781D_REG_PWM[nr], data->pwm[nr]);
 733         mutex_unlock(&data->update_lock);
 734         return count;
 735 }
 736
 737 static ssize_t
 738 pwm2_enable_store(struct device *dev, struct device_attribute *da,
 739                 const char *buf, size_t count)
 740 {
 741         struct w83781d_data *data = dev_get_drvdata(dev);
 742         unsigned long val;
 743         u32 reg;
 744         int err;
 745
 746         err = kstrtoul(buf, 10, &val);
 747         if (err)
 748                 return err;
 749
 750         mutex_lock(&data->update_lock);
 751
 752         switch (val) {
 753         case 0:
 754         case 1:
 755                 reg = w83781d_read_value(data, W83781D_REG_PWMCLK12);
 756                 w83781d_write_value(data, W83781D_REG_PWMCLK12,
 757                                     (reg & 0xf7) | (val << 3));
 758
 759                 reg = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
 760                 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG,
 761                                     (reg & 0xef) | (!val << 4));
 762
 763                 data->pwm2_enable = val;
 764                 break;
 765
 766         default:
 767                 mutex_unlock(&data->update_lock);
 768                 return -EINVAL;
 769         }
 770
 771         mutex_unlock(&data->update_lock);
 772         return count;
 773 }
 774
 775 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0);
 776 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 1);
 777 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 2);
 778 static SENSOR_DEVICE_ATTR(pwm4, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 3);
 779 /* only PWM2 can be enabled/disabled */
 780 static DEVICE_ATTR_RW(pwm2_enable);
 781
 782 static ssize_t
 783 show_sensor(struct device *dev, struct device_attribute *da, char *buf)
 784 {
 785         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 786         struct w83781d_data *data = w83781d_update_device(dev);
 787         return sprintf(buf, "%d\n", (int)data->sens[attr->index]);
 788 }
 789
 790 static ssize_t
 791 store_sensor(struct device *dev, struct device_attribute *da,
 792                 const char *buf, size_t count)
 793 {
 794         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 795         struct w83781d_data *data = dev_get_drvdata(dev);
 796         int nr = attr->index;
 797         unsigned long val;
 798         u32 tmp;
 799         int err;
 800
 801         err = kstrtoul(buf, 10, &val);
 802         if (err)
 803                 return err;
 804
 805         mutex_lock(&data->update_lock);
 806
 807         switch (val) {
 808         case 1:         /* PII/Celeron diode */
 809                 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
 810                 w83781d_write_value(data, W83781D_REG_SCFG1,
 811                                     tmp | BIT_SCFG1[nr]);
 812                 tmp = w83781d_read_value(data, W83781D_REG_SCFG2);
 813                 w83781d_write_value(data, W83781D_REG_SCFG2,
 814                                     tmp | BIT_SCFG2[nr]);
 815                 data->sens[nr] = val;
 816                 break;
 817         case 2:         /* 3904 */
 818                 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
 819                 w83781d_write_value(data, W83781D_REG_SCFG1,
 820                                     tmp | BIT_SCFG1[nr]);
 821                 tmp = w83781d_read_value(data, W83781D_REG_SCFG2);
 822                 w83781d_write_value(data, W83781D_REG_SCFG2,
 823                                     tmp & ~BIT_SCFG2[nr]);
 824                 data->sens[nr] = val;
 825                 break;
 826         case W83781D_DEFAULT_BETA:
 827                 dev_warn(dev,
 828                          "Sensor type %d is deprecated, please use 4 instead\n",
 829                          W83781D_DEFAULT_BETA);
 830                 /* fall through */
 831         case 4:         /* thermistor */
 832                 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
 833                 w83781d_write_value(data, W83781D_REG_SCFG1,
 834                                     tmp & ~BIT_SCFG1[nr]);
 835                 data->sens[nr] = val;
 836                 break;
 837         default:
 838                 dev_err(dev, "Invalid sensor type %ld; must be 1, 2, or 4\n",
 839                        (long) val);
 840                 break;
 841         }
 842
 843         mutex_unlock(&data->update_lock);
 844         return count;
 845 }
 846
 847 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR,
 848         show_sensor, store_sensor, 0);
 849 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR,
 850         show_sensor, store_sensor, 1);
 851 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR,
 852         show_sensor, store_sensor, 2);
 853
 854 /*
 855  * Assumes that adapter is of I2C, not ISA variety.
 856  * OTHERWISE DON'T CALL THIS
 857  */
 858 static int
 859 w83781d_detect_subclients(struct i2c_client *new_client)
 860 {
 861         int i, val1 = 0, id;
 862         int err;
 863         int address = new_client->addr;
 864         unsigned short sc_addr[2];
 865         struct i2c_adapter *adapter = new_client->adapter;
 866         struct w83781d_data *data = i2c_get_clientdata(new_client);
 867         enum chips kind = data->type;
 868         int num_sc = 1;
 869
 870         id = i2c_adapter_id(adapter);
 871
 872         if (force_subclients[0] == id && force_subclients[1] == address) {
 873                 for (i = 2; i <= 3; i++) {
 874                         if (force_subclients[i] < 0x48 ||
 875                             force_subclients[i] > 0x4f) {
 876                                 dev_err(&new_client->dev,
 877                                         "Invalid subclient address %d; must be 0x48-0x4f\n",
 878                                         force_subclients[i]);
 879                                 err = -EINVAL;
 880                                 goto ERROR_SC_1;
 881                         }
 882                 }
 883                 w83781d_write_value(data, W83781D_REG_I2C_SUBADDR,
 884                                 (force_subclients[2] & 0x07) |
 885                                 ((force_subclients[3] & 0x07) << 4));
 886                 sc_addr[0] = force_subclients[2];
 887         } else {
 888                 val1 = w83781d_read_value(data, W83781D_REG_I2C_SUBADDR);
 889                 sc_addr[0] = 0x48 + (val1 & 0x07);
 890         }
 891
 892         if (kind != w83783s) {
 893                 num_sc = 2;
 894                 if (force_subclients[0] == id &&
 895                     force_subclients[1] == address) {
 896                         sc_addr[1] = force_subclients[3];
 897                 } else {
 898                         sc_addr[1] = 0x48 + ((val1 >> 4) & 0x07);
 899                 }
 900                 if (sc_addr[0] == sc_addr[1]) {
 901                         dev_err(&new_client->dev,
 902                                "Duplicate addresses 0x%x for subclients.\n",
 903                                sc_addr[0]);
 904                         err = -EBUSY;
 905                         goto ERROR_SC_2;
 906                 }
 907         }
 908
 909         for (i = 0; i < num_sc; i++) {
 910                 data->lm75[i] = i2c_new_dummy(adapter, sc_addr[i]);
 911                 if (!data->lm75[i]) {
 912                         dev_err(&new_client->dev,
 913                                 "Subclient %d registration at address 0x%x failed.\n",
 914                                 i, sc_addr[i]);
 915                         err = -ENOMEM;
 916                         if (i == 1)
 917                                 goto ERROR_SC_3;
 918                         goto ERROR_SC_2;
 919                 }
 920         }
 921
 922         return 0;
 923
 924 /* Undo inits in case of errors */
 925 ERROR_SC_3:
 926         i2c_unregister_device(data->lm75[0]);
 927 ERROR_SC_2:
 928 ERROR_SC_1:
 929         return err;
 930 }
 931
 932 #define IN_UNIT_ATTRS(X)                                        \
 933         &sensor_dev_attr_in##X##_input.dev_attr.attr,           \
 934         &sensor_dev_attr_in##X##_min.dev_attr.attr,             \
 935         &sensor_dev_attr_in##X##_max.dev_attr.attr,             \
 936         &sensor_dev_attr_in##X##_alarm.dev_attr.attr,           \
 937         &sensor_dev_attr_in##X##_beep.dev_attr.attr
 938
 939 #define FAN_UNIT_ATTRS(X)                                       \
 940         &sensor_dev_attr_fan##X##_input.dev_attr.attr,          \
 941         &sensor_dev_attr_fan##X##_min.dev_attr.attr,            \
 942         &sensor_dev_attr_fan##X##_div.dev_attr.attr,            \
 943         &sensor_dev_attr_fan##X##_alarm.dev_attr.attr,          \
 944         &sensor_dev_attr_fan##X##_beep.dev_attr.attr
 945
 946 #define TEMP_UNIT_ATTRS(X)                                      \
 947         &sensor_dev_attr_temp##X##_input.dev_attr.attr,         \
 948         &sensor_dev_attr_temp##X##_max.dev_attr.attr,           \
 949         &sensor_dev_attr_temp##X##_max_hyst.dev_attr.attr,      \
 950         &sensor_dev_attr_temp##X##_alarm.dev_attr.attr,         \
 951         &sensor_dev_attr_temp##X##_beep.dev_attr.attr
 952
 953 static struct attribute *w83781d_attributes[] = {
 954         IN_UNIT_ATTRS(0),
 955         IN_UNIT_ATTRS(2),
 956         IN_UNIT_ATTRS(3),
 957         IN_UNIT_ATTRS(4),
 958         IN_UNIT_ATTRS(5),
 959         IN_UNIT_ATTRS(6),
 960         FAN_UNIT_ATTRS(1),
 961         FAN_UNIT_ATTRS(2),
 962         FAN_UNIT_ATTRS(3),
 963         TEMP_UNIT_ATTRS(1),
 964         TEMP_UNIT_ATTRS(2),
 965         &dev_attr_cpu0_vid.attr,
 966         &dev_attr_vrm.attr,
 967         &dev_attr_alarms.attr,
 968         &dev_attr_beep_mask.attr,
 969         &sensor_dev_attr_beep_enable.dev_attr.attr,
 970         NULL
 971 };
 972 static const struct attribute_group w83781d_group = {
 973         .attrs = w83781d_attributes,
 974 };
 975
 976 static struct attribute *w83781d_attributes_in1[] = {
 977         IN_UNIT_ATTRS(1),
 978         NULL
 979 };
 980 static const struct attribute_group w83781d_group_in1 = {
 981         .attrs = w83781d_attributes_in1,
 982 };
 983
 984 static struct attribute *w83781d_attributes_in78[] = {
 985         IN_UNIT_ATTRS(7),
 986         IN_UNIT_ATTRS(8),
 987         NULL
 988 };
 989 static const struct attribute_group w83781d_group_in78 = {
 990         .attrs = w83781d_attributes_in78,
 991 };
 992
 993 static struct attribute *w83781d_attributes_temp3[] = {
 994         TEMP_UNIT_ATTRS(3),
 995         NULL
 996 };
 997 static const struct attribute_group w83781d_group_temp3 = {
 998         .attrs = w83781d_attributes_temp3,
 999 };
1000
1001 static struct attribute *w83781d_attributes_pwm12[] = {
1002         &sensor_dev_attr_pwm1.dev_attr.attr,
1003         &sensor_dev_attr_pwm2.dev_attr.attr,
1004         &dev_attr_pwm2_enable.attr,
1005         NULL
1006 };
1007 static const struct attribute_group w83781d_group_pwm12 = {
1008         .attrs = w83781d_attributes_pwm12,
1009 };
1010
1011 static struct attribute *w83781d_attributes_pwm34[] = {
1012         &sensor_dev_attr_pwm3.dev_attr.attr,
1013         &sensor_dev_attr_pwm4.dev_attr.attr,
1014         NULL
1015 };
1016 static const struct attribute_group w83781d_group_pwm34 = {
1017         .attrs = w83781d_attributes_pwm34,
1018 };
1019
1020 static struct attribute *w83781d_attributes_other[] = {
1021         &sensor_dev_attr_temp1_type.dev_attr.attr,
1022         &sensor_dev_attr_temp2_type.dev_attr.attr,
1023         &sensor_dev_attr_temp3_type.dev_attr.attr,
1024         NULL
1025 };
1026 static const struct attribute_group w83781d_group_other = {
1027         .attrs = w83781d_attributes_other,
1028 };
1029
1030 /* No clean up is done on error, it's up to the caller */
1031 static int
1032 w83781d_create_files(struct device *dev, int kind, int is_isa)
1033 {
1034         int err;
1035
1036         err = sysfs_create_group(&dev->kobj, &w83781d_group);
1037         if (err)
1038                 return err;
1039
1040         if (kind != w83783s) {
1041                 err = sysfs_create_group(&dev->kobj, &w83781d_group_in1);
1042                 if (err)
1043                         return err;
1044         }
1045         if (kind != as99127f && kind != w83781d && kind != w83783s) {
1046                 err = sysfs_create_group(&dev->kobj, &w83781d_group_in78);
1047                 if (err)
1048                         return err;
1049         }
1050         if (kind != w83783s) {
1051                 err = sysfs_create_group(&dev->kobj, &w83781d_group_temp3);
1052                 if (err)
1053                         return err;
1054
1055                 if (kind != w83781d) {
1056                         err = sysfs_chmod_file(&dev->kobj,
1057                                 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1058                                 S_IRUGO | S_IWUSR);
1059                         if (err)
1060                                 return err;
1061                 }
1062         }
1063
1064         if (kind != w83781d && kind != as99127f) {
1065                 err = sysfs_create_group(&dev->kobj, &w83781d_group_pwm12);
1066                 if (err)
1067                         return err;
1068         }
1069         if (kind == w83782d && !is_isa) {
1070                 err = sysfs_create_group(&dev->kobj, &w83781d_group_pwm34);
1071                 if (err)
1072                         return err;
1073         }
1074
1075         if (kind != as99127f && kind != w83781d) {
1076                 err = device_create_file(dev,
1077                                          &sensor_dev_attr_temp1_type.dev_attr);
1078                 if (err)
1079                         return err;
1080                 err = device_create_file(dev,
1081                                          &sensor_dev_attr_temp2_type.dev_attr);
1082                 if (err)
1083                         return err;
1084                 if (kind != w83783s) {
1085                         err = device_create_file(dev,
1086                                         &sensor_dev_attr_temp3_type.dev_attr);
1087                         if (err)
1088                                 return err;
1089                 }
1090         }
1091
1092         return 0;
1093 }
1094
1095 /* Return 0 if detection is successful, -ENODEV otherwise */
1096 static int
1097 w83781d_detect(struct i2c_client *client, struct i2c_board_info *info)
1098 {
1099         int val1, val2;
1100         struct w83781d_data *isa = w83781d_data_if_isa();
1101         struct i2c_adapter *adapter = client->adapter;
1102         int address = client->addr;
1103         const char *client_name;
1104         enum vendor { winbond, asus } vendid;
1105
1106         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1107                 return -ENODEV;
1108
1109         /*
1110          * We block updates of the ISA device to minimize the risk of
1111          * concurrent access to the same W83781D chip through different
1112          * interfaces.
1113          */
1114         if (isa)
1115                 mutex_lock(&isa->update_lock);
1116
1117         if (i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG) & 0x80) {
1118                 dev_dbg(&adapter->dev,
1119                         "Detection of w83781d chip failed at step 3\n");
1120                 goto err_nodev;
1121         }
1122
1123         val1 = i2c_smbus_read_byte_data(client, W83781D_REG_BANK);
1124         val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
1125         /* Check for Winbond or Asus ID if in bank 0 */
1126         if (!(val1 & 0x07) &&
1127             ((!(val1 & 0x80) && val2 != 0xa3 && val2 != 0xc3) ||
1128              ((val1 & 0x80) && val2 != 0x5c && val2 != 0x12))) {
1129                 dev_dbg(&adapter->dev,
1130                         "Detection of w83781d chip failed at step 4\n");
1131                 goto err_nodev;
1132         }
1133         /*
1134          * If Winbond SMBus, check address at 0x48.
1135          * Asus doesn't support, except for as99127f rev.2
1136          */
1137         if ((!(val1 & 0x80) && val2 == 0xa3) ||
1138             ((val1 & 0x80) && val2 == 0x5c)) {
1139                 if (i2c_smbus_read_byte_data(client, W83781D_REG_I2C_ADDR)
1140                     != address) {
1141                         dev_dbg(&adapter->dev,
1142                                 "Detection of w83781d chip failed at step 5\n");
1143                         goto err_nodev;
1144                 }
1145         }
1146
1147         /* Put it now into bank 0 and Vendor ID High Byte */
1148         i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1149                 (i2c_smbus_read_byte_data(client, W83781D_REG_BANK)
1150                  & 0x78) | 0x80);
1151
1152         /* Get the vendor ID */
1153         val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
1154         if (val2 == 0x5c)
1155                 vendid = winbond;
1156         else if (val2 == 0x12)
1157                 vendid = asus;
1158         else {
1159                 dev_dbg(&adapter->dev,
1160                         "w83781d chip vendor is neither Winbond nor Asus\n");
1161                 goto err_nodev;
1162         }
1163
1164         /* Determine the chip type. */
1165         val1 = i2c_smbus_read_byte_data(client, W83781D_REG_WCHIPID);
1166         if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond)
1167                 client_name = "w83781d";
1168         else if (val1 == 0x30 && vendid == winbond)
1169                 client_name = "w83782d";
1170         else if (val1 == 0x40 && vendid == winbond && address == 0x2d)
1171                 client_name = "w83783s";
1172         else if (val1 == 0x31)
1173                 client_name = "as99127f";
1174         else
1175                 goto err_nodev;
1176
1177         if (val1 <= 0x30 && w83781d_alias_detect(client, val1)) {
1178                 dev_dbg(&adapter->dev,
1179                         "Device at 0x%02x appears to be the same as ISA device\n",
1180                         address);
1181                 goto err_nodev;
1182         }
1183
1184         if (isa)
1185                 mutex_unlock(&isa->update_lock);
1186
1187         strlcpy(info->type, client_name, I2C_NAME_SIZE);
1188
1189         return 0;
1190
1191  err_nodev:
1192         if (isa)
1193                 mutex_unlock(&isa->update_lock);
1194         return -ENODEV;
1195 }
1196
1197 static void w83781d_remove_files(struct device *dev)
1198 {
1199         sysfs_remove_group(&dev->kobj, &w83781d_group);
1200         sysfs_remove_group(&dev->kobj, &w83781d_group_in1);
1201         sysfs_remove_group(&dev->kobj, &w83781d_group_in78);
1202         sysfs_remove_group(&dev->kobj, &w83781d_group_temp3);
1203         sysfs_remove_group(&dev->kobj, &w83781d_group_pwm12);
1204         sysfs_remove_group(&dev->kobj, &w83781d_group_pwm34);
1205         sysfs_remove_group(&dev->kobj, &w83781d_group_other);
1206 }
1207
1208 static int
1209 w83781d_probe(struct i2c_client *client, const struct i2c_device_id *id)
1210 {
1211         struct device *dev = &client->dev;
1212         struct w83781d_data *data;
1213         int err;
1214
1215         data = devm_kzalloc(dev, sizeof(struct w83781d_data), GFP_KERNEL);
1216         if (!data)
1217                 return -ENOMEM;
1218
1219         i2c_set_clientdata(client, data);
1220         mutex_init(&data->lock);
1221         mutex_init(&data->update_lock);
1222
1223         data->type = id->driver_data;
1224         data->client = client;
1225
1226         /* attach secondary i2c lm75-like clients */
1227         err = w83781d_detect_subclients(client);
1228         if (err)
1229                 return err;
1230
1231         /* Initialize the chip */
1232         w83781d_init_device(dev);
1233
1234         /* Register sysfs hooks */
1235         err = w83781d_create_files(dev, data->type, 0);
1236         if (err)
1237                 goto exit_remove_files;
1238
1239         data->hwmon_dev = hwmon_device_register(dev);
1240         if (IS_ERR(data->hwmon_dev)) {
1241                 err = PTR_ERR(data->hwmon_dev);
1242                 goto exit_remove_files;
1243         }
1244
1245         return 0;
1246
1247  exit_remove_files:
1248         w83781d_remove_files(dev);
1249         i2c_unregister_device(data->lm75[0]);
1250         i2c_unregister_device(data->lm75[1]);
1251         return err;
1252 }
1253
1254 static int
1255 w83781d_remove(struct i2c_client *client)
1256 {
1257         struct w83781d_data *data = i2c_get_clientdata(client);
1258         struct device *dev = &client->dev;
1259
1260         hwmon_device_unregister(data->hwmon_dev);
1261         w83781d_remove_files(dev);
1262
1263         i2c_unregister_device(data->lm75[0]);
1264         i2c_unregister_device(data->lm75[1]);
1265
1266         return 0;
1267 }
1268
1269 static int
1270 w83781d_read_value_i2c(struct w83781d_data *data, u16 reg)
1271 {
1272         struct i2c_client *client = data->client;
1273         int res, bank;
1274         struct i2c_client *cl;
1275
1276         bank = (reg >> 8) & 0x0f;
1277         if (bank > 2)
1278                 /* switch banks */
1279                 i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1280                                           bank);
1281         if (bank == 0 || bank > 2) {
1282                 res = i2c_smbus_read_byte_data(client, reg & 0xff);
1283         } else {
1284                 /* switch to subclient */
1285                 cl = data->lm75[bank - 1];
1286                 /* convert from ISA to LM75 I2C addresses */
1287                 switch (reg & 0xff) {
1288                 case 0x50:      /* TEMP */
1289                         res = i2c_smbus_read_word_swapped(cl, 0);
1290                         break;
1291                 case 0x52:      /* CONFIG */
1292                         res = i2c_smbus_read_byte_data(cl, 1);
1293                         break;
1294                 case 0x53:      /* HYST */
1295                         res = i2c_smbus_read_word_swapped(cl, 2);
1296                         break;
1297                 case 0x55:      /* OVER */
1298                 default:
1299                         res = i2c_smbus_read_word_swapped(cl, 3);
1300                         break;
1301                 }
1302         }
1303         if (bank > 2)
1304                 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1305
1306         return res;
1307 }
1308
1309 static int
1310 w83781d_write_value_i2c(struct w83781d_data *data, u16 reg, u16 value)
1311 {
1312         struct i2c_client *client = data->client;
1313         int bank;
1314         struct i2c_client *cl;
1315
1316         bank = (reg >> 8) & 0x0f;
1317         if (bank > 2)
1318                 /* switch banks */
1319                 i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1320                                           bank);
1321         if (bank == 0 || bank > 2) {
1322                 i2c_smbus_write_byte_data(client, reg & 0xff,
1323                                           value & 0xff);
1324         } else {
1325                 /* switch to subclient */
1326                 cl = data->lm75[bank - 1];
1327                 /* convert from ISA to LM75 I2C addresses */
1328                 switch (reg & 0xff) {
1329                 case 0x52:      /* CONFIG */
1330                         i2c_smbus_write_byte_data(cl, 1, value & 0xff);
1331                         break;
1332                 case 0x53:      /* HYST */
1333                         i2c_smbus_write_word_swapped(cl, 2, value);
1334                         break;
1335                 case 0x55:      /* OVER */
1336                         i2c_smbus_write_word_swapped(cl, 3, value);
1337                         break;
1338                 }
1339         }
1340         if (bank > 2)
1341                 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1342
1343         return 0;
1344 }
1345
1346 static void
1347 w83781d_init_device(struct device *dev)
1348 {
1349         struct w83781d_data *data = dev_get_drvdata(dev);
1350         int i, p;
1351         int type = data->type;
1352         u8 tmp;
1353
1354         if (reset && type != as99127f) { /*
1355                                           * this resets registers we don't have
1356                                           * documentation for on the as99127f
1357                                           */
1358                 /*
1359                  * Resetting the chip has been the default for a long time,
1360                  * but it causes the BIOS initializations (fan clock dividers,
1361                  * thermal sensor types...) to be lost, so it is now optional.
1362                  * It might even go away if nobody reports it as being useful,
1363                  * as I see very little reason why this would be needed at
1364                  * all.
1365                  */
1366                 dev_info(dev,
1367                          "If reset=1 solved a problem you were having, please report!\n");
1368
1369                 /* save these registers */
1370                 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
1371                 p = w83781d_read_value(data, W83781D_REG_PWMCLK12);
1372                 /*
1373                  * Reset all except Watchdog values and last conversion values
1374                  * This sets fan-divs to 2, among others
1375                  */
1376                 w83781d_write_value(data, W83781D_REG_CONFIG, 0x80);
1377                 /*
1378                  * Restore the registers and disable power-on abnormal beep.
1379                  * This saves FAN 1/2/3 input/output values set by BIOS.
1380                  */
1381                 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
1382                 w83781d_write_value(data, W83781D_REG_PWMCLK12, p);
1383                 /*
1384                  * Disable master beep-enable (reset turns it on).
1385                  * Individual beep_mask should be reset to off but for some
1386                  * reason disabling this bit helps some people not get beeped
1387                  */
1388                 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, 0);
1389         }
1390
1391         /*
1392          * Disable power-on abnormal beep, as advised by the datasheet.
1393          * Already done if reset=1.
1394          */
1395         if (init && !reset && type != as99127f) {
1396                 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
1397                 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
1398         }
1399
1400         data->vrm = vid_which_vrm();
1401
1402         if ((type != w83781d) && (type != as99127f)) {
1403                 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
1404                 for (i = 1; i <= 3; i++) {
1405                         if (!(tmp & BIT_SCFG1[i - 1])) {
1406                                 data->sens[i - 1] = 4;
1407                         } else {
1408                                 if (w83781d_read_value
1409                                     (data,
1410                                      W83781D_REG_SCFG2) & BIT_SCFG2[i - 1])
1411                                         data->sens[i - 1] = 1;
1412                                 else
1413                                         data->sens[i - 1] = 2;
1414                         }
1415                         if (type == w83783s && i == 2)
1416                                 break;
1417                 }
1418         }
1419
1420         if (init && type != as99127f) {
1421                 /* Enable temp2 */
1422                 tmp = w83781d_read_value(data, W83781D_REG_TEMP2_CONFIG);
1423                 if (tmp & 0x01) {
1424                         dev_warn(dev,
1425                                  "Enabling temp2, readings might not make sense\n");
1426                         w83781d_write_value(data, W83781D_REG_TEMP2_CONFIG,
1427                                 tmp & 0xfe);
1428                 }
1429
1430                 /* Enable temp3 */
1431                 if (type != w83783s) {
1432                         tmp = w83781d_read_value(data,
1433                                 W83781D_REG_TEMP3_CONFIG);
1434                         if (tmp & 0x01) {
1435                                 dev_warn(dev,
1436                                          "Enabling temp3, readings might not make sense\n");
1437                                 w83781d_write_value(data,
1438                                         W83781D_REG_TEMP3_CONFIG, tmp & 0xfe);
1439                         }
1440                 }
1441         }
1442
1443         /* Start monitoring */
1444         w83781d_write_value(data, W83781D_REG_CONFIG,
1445                             (w83781d_read_value(data,
1446                                                 W83781D_REG_CONFIG) & 0xf7)
1447                             | 0x01);
1448
1449         /* A few vars need to be filled upon startup */
1450         for (i = 0; i < 3; i++) {
1451                 data->fan_min[i] = w83781d_read_value(data,
1452                                         W83781D_REG_FAN_MIN(i));
1453         }
1454
1455         mutex_init(&data->update_lock);
1456 }
1457
1458 static struct w83781d_data *w83781d_update_device(struct device *dev)
1459 {
1460         struct w83781d_data *data = dev_get_drvdata(dev);
1461         struct i2c_client *client = data->client;
1462         int i;
1463
1464         mutex_lock(&data->update_lock);
1465
1466         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1467             || !data->valid) {
1468                 dev_dbg(dev, "Starting device update\n");
1469
1470                 for (i = 0; i <= 8; i++) {
1471                         if (data->type == w83783s && i == 1)
1472                                 continue;       /* 783S has no in1 */
1473                         data->in[i] =
1474                             w83781d_read_value(data, W83781D_REG_IN(i));
1475                         data->in_min[i] =
1476                             w83781d_read_value(data, W83781D_REG_IN_MIN(i));
1477                         data->in_max[i] =
1478                             w83781d_read_value(data, W83781D_REG_IN_MAX(i));
1479                         if ((data->type != w83782d) && (i == 6))
1480                                 break;
1481                 }
1482                 for (i = 0; i < 3; i++) {
1483                         data->fan[i] =
1484                             w83781d_read_value(data, W83781D_REG_FAN(i));
1485                         data->fan_min[i] =
1486                             w83781d_read_value(data, W83781D_REG_FAN_MIN(i));
1487                 }
1488                 if (data->type != w83781d && data->type != as99127f) {
1489                         for (i = 0; i < 4; i++) {
1490                                 data->pwm[i] =
1491                                     w83781d_read_value(data,
1492                                                        W83781D_REG_PWM[i]);
1493                                 /* Only W83782D on SMBus has PWM3 and PWM4 */
1494                                 if ((data->type != w83782d || !client)
1495                                     && i == 1)
1496                                         break;
1497                         }
1498                         /* Only PWM2 can be disabled */
1499                         data->pwm2_enable = (w83781d_read_value(data,
1500                                              W83781D_REG_PWMCLK12) & 0x08) >> 3;
1501                 }
1502
1503                 data->temp = w83781d_read_value(data, W83781D_REG_TEMP(1));
1504                 data->temp_max =
1505                     w83781d_read_value(data, W83781D_REG_TEMP_OVER(1));
1506                 data->temp_max_hyst =
1507                     w83781d_read_value(data, W83781D_REG_TEMP_HYST(1));
1508                 data->temp_add[0] =
1509                     w83781d_read_value(data, W83781D_REG_TEMP(2));
1510                 data->temp_max_add[0] =
1511                     w83781d_read_value(data, W83781D_REG_TEMP_OVER(2));
1512                 data->temp_max_hyst_add[0] =
1513                     w83781d_read_value(data, W83781D_REG_TEMP_HYST(2));
1514                 if (data->type != w83783s) {
1515                         data->temp_add[1] =
1516                             w83781d_read_value(data, W83781D_REG_TEMP(3));
1517                         data->temp_max_add[1] =
1518                             w83781d_read_value(data,
1519                                                W83781D_REG_TEMP_OVER(3));
1520                         data->temp_max_hyst_add[1] =
1521                             w83781d_read_value(data,
1522                                                W83781D_REG_TEMP_HYST(3));
1523                 }
1524                 i = w83781d_read_value(data, W83781D_REG_VID_FANDIV);
1525                 data->vid = i & 0x0f;
1526                 data->vid |= (w83781d_read_value(data,
1527                                         W83781D_REG_CHIPID) & 0x01) << 4;
1528                 data->fan_div[0] = (i >> 4) & 0x03;
1529                 data->fan_div[1] = (i >> 6) & 0x03;
1530                 data->fan_div[2] = (w83781d_read_value(data,
1531                                         W83781D_REG_PIN) >> 6) & 0x03;
1532                 if ((data->type != w83781d) && (data->type != as99127f)) {
1533                         i = w83781d_read_value(data, W83781D_REG_VBAT);
1534                         data->fan_div[0] |= (i >> 3) & 0x04;
1535                         data->fan_div[1] |= (i >> 4) & 0x04;
1536                         data->fan_div[2] |= (i >> 5) & 0x04;
1537                 }
1538                 if (data->type == w83782d) {
1539                         data->alarms = w83781d_read_value(data,
1540                                                 W83782D_REG_ALARM1)
1541                                      | (w83781d_read_value(data,
1542                                                 W83782D_REG_ALARM2) << 8)
1543                                      | (w83781d_read_value(data,
1544                                                 W83782D_REG_ALARM3) << 16);
1545                 } else if (data->type == w83783s) {
1546                         data->alarms = w83781d_read_value(data,
1547                                                 W83782D_REG_ALARM1)
1548                                      | (w83781d_read_value(data,
1549                                                 W83782D_REG_ALARM2) << 8);
1550                 } else {
1551                         /*
1552                          * No real-time status registers, fall back to
1553                          * interrupt status registers
1554                          */
1555                         data->alarms = w83781d_read_value(data,
1556                                                 W83781D_REG_ALARM1)
1557                                      | (w83781d_read_value(data,
1558                                                 W83781D_REG_ALARM2) << 8);
1559                 }
1560                 i = w83781d_read_value(data, W83781D_REG_BEEP_INTS2);
1561                 data->beep_mask = (i << 8) +
1562                     w83781d_read_value(data, W83781D_REG_BEEP_INTS1);
1563                 if ((data->type != w83781d) && (data->type != as99127f)) {
1564                         data->beep_mask |=
1565                             w83781d_read_value(data,
1566                                                W83781D_REG_BEEP_INTS3) << 16;
1567                 }
1568                 data->last_updated = jiffies;
1569                 data->valid = 1;
1570         }
1571
1572         mutex_unlock(&data->update_lock);
1573
1574         return data;
1575 }
1576
1577 static const struct i2c_device_id w83781d_ids[] = {
1578         { "w83781d", w83781d, },
1579         { "w83782d", w83782d, },
1580         { "w83783s", w83783s, },
1581         { "as99127f", as99127f },
1582         { /* LIST END */ }
1583 };
1584 MODULE_DEVICE_TABLE(i2c, w83781d_ids);
1585
1586 static struct i2c_driver w83781d_driver = {
1587         .class          = I2C_CLASS_HWMON,
1588         .driver = {
1589                 .name = "w83781d",
1590         },
1591         .probe          = w83781d_probe,
1592         .remove         = w83781d_remove,
1593         .id_table       = w83781d_ids,
1594         .detect         = w83781d_detect,
1595         .address_list   = normal_i2c,
1596 };
1597
1598 /*
1599  * ISA related code
1600  */
1601 #ifdef CONFIG_ISA
1602
1603 /* ISA device, if found */
1604 static struct platform_device *pdev;
1605
1606 static unsigned short isa_address = 0x290;
1607
1608 /*
1609  * I2C devices get this name attribute automatically, but for ISA devices
1610  * we must create it by ourselves.
1611  */
1612 static ssize_t
1613 name_show(struct device *dev, struct device_attribute *devattr, char *buf)
1614 {
1615         struct w83781d_data *data = dev_get_drvdata(dev);
1616         return sprintf(buf, "%s\n", data->name);
1617 }
1618 static DEVICE_ATTR_RO(name);
1619
1620 static struct w83781d_data *w83781d_data_if_isa(void)
1621 {
1622         return pdev ? platform_get_drvdata(pdev) : NULL;
1623 }
1624
1625 /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */
1626 static int w83781d_alias_detect(struct i2c_client *client, u8 chipid)
1627 {
1628         struct w83781d_data *isa;
1629         int i;
1630
1631         if (!pdev)      /* No ISA chip */
1632                 return 0;
1633
1634         isa = platform_get_drvdata(pdev);
1635
1636         if (w83781d_read_value(isa, W83781D_REG_I2C_ADDR) != client->addr)
1637                 return 0;       /* Address doesn't match */
1638         if (w83781d_read_value(isa, W83781D_REG_WCHIPID) != chipid)
1639                 return 0;       /* Chip type doesn't match */
1640
1641         /*
1642          * We compare all the limit registers, the config register and the
1643          * interrupt mask registers
1644          */
1645         for (i = 0x2b; i <= 0x3d; i++) {
1646                 if (w83781d_read_value(isa, i) !=
1647                     i2c_smbus_read_byte_data(client, i))
1648                         return 0;
1649         }
1650         if (w83781d_read_value(isa, W83781D_REG_CONFIG) !=
1651             i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG))
1652                 return 0;
1653         for (i = 0x43; i <= 0x46; i++) {
1654                 if (w83781d_read_value(isa, i) !=
1655                     i2c_smbus_read_byte_data(client, i))
1656                         return 0;
1657         }
1658
1659         return 1;
1660 }
1661
1662 static int
1663 w83781d_read_value_isa(struct w83781d_data *data, u16 reg)
1664 {
1665         int word_sized, res;
1666
1667         word_sized = (((reg & 0xff00) == 0x100)
1668                       || ((reg & 0xff00) == 0x200))
1669             && (((reg & 0x00ff) == 0x50)
1670                 || ((reg & 0x00ff) == 0x53)
1671                 || ((reg & 0x00ff) == 0x55));
1672         if (reg & 0xff00) {
1673                 outb_p(W83781D_REG_BANK,
1674                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1675                 outb_p(reg >> 8,
1676                        data->isa_addr + W83781D_DATA_REG_OFFSET);
1677         }
1678         outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
1679         res = inb_p(data->isa_addr + W83781D_DATA_REG_OFFSET);
1680         if (word_sized) {
1681                 outb_p((reg & 0xff) + 1,
1682                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1683                 res =
1684                     (res << 8) + inb_p(data->isa_addr +
1685                                        W83781D_DATA_REG_OFFSET);
1686         }
1687         if (reg & 0xff00) {
1688                 outb_p(W83781D_REG_BANK,
1689                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1690                 outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
1691         }
1692         return res;
1693 }
1694
1695 static void
1696 w83781d_write_value_isa(struct w83781d_data *data, u16 reg, u16 value)
1697 {
1698         int word_sized;
1699
1700         word_sized = (((reg & 0xff00) == 0x100)
1701                       || ((reg & 0xff00) == 0x200))
1702             && (((reg & 0x00ff) == 0x53)
1703                 || ((reg & 0x00ff) == 0x55));
1704         if (reg & 0xff00) {
1705                 outb_p(W83781D_REG_BANK,
1706                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1707                 outb_p(reg >> 8,
1708                        data->isa_addr + W83781D_DATA_REG_OFFSET);
1709         }
1710         outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
1711         if (word_sized) {
1712                 outb_p(value >> 8,
1713                        data->isa_addr + W83781D_DATA_REG_OFFSET);
1714                 outb_p((reg & 0xff) + 1,
1715                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1716         }
1717         outb_p(value & 0xff, data->isa_addr + W83781D_DATA_REG_OFFSET);
1718         if (reg & 0xff00) {
1719                 outb_p(W83781D_REG_BANK,
1720                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1721                 outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
1722         }
1723 }
1724
1725 /*
1726  * The SMBus locks itself, usually, but nothing may access the Winbond between
1727  * bank switches. ISA access must always be locked explicitly!
1728  * We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks,
1729  * would slow down the W83781D access and should not be necessary.
1730  * There are some ugly typecasts here, but the good news is - they should
1731  * nowhere else be necessary!
1732  */
1733 static int
1734 w83781d_read_value(struct w83781d_data *data, u16 reg)
1735 {
1736         struct i2c_client *client = data->client;
1737         int res;
1738
1739         mutex_lock(&data->lock);
1740         if (client)
1741                 res = w83781d_read_value_i2c(data, reg);
1742         else
1743                 res = w83781d_read_value_isa(data, reg);
1744         mutex_unlock(&data->lock);
1745         return res;
1746 }
1747
1748 static int
1749 w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
1750 {
1751         struct i2c_client *client = data->client;
1752
1753         mutex_lock(&data->lock);
1754         if (client)
1755                 w83781d_write_value_i2c(data, reg, value);
1756         else
1757                 w83781d_write_value_isa(data, reg, value);
1758         mutex_unlock(&data->lock);
1759         return 0;
1760 }
1761
1762 static int
1763 w83781d_isa_probe(struct platform_device *pdev)
1764 {
1765         int err, reg;
1766         struct w83781d_data *data;
1767         struct resource *res;
1768
1769         /* Reserve the ISA region */
1770         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1771         if (!devm_request_region(&pdev->dev,
1772                                  res->start + W83781D_ADDR_REG_OFFSET, 2,
1773                                  "w83781d"))
1774                 return -EBUSY;
1775
1776         data = devm_kzalloc(&pdev->dev, sizeof(struct w83781d_data),
1777                             GFP_KERNEL);
1778         if (!data)
1779                 return -ENOMEM;
1780
1781         mutex_init(&data->lock);
1782         data->isa_addr = res->start;
1783         platform_set_drvdata(pdev, data);
1784
1785         reg = w83781d_read_value(data, W83781D_REG_WCHIPID);
1786         switch (reg) {
1787         case 0x30:
1788                 data->type = w83782d;
1789                 data->name = "w83782d";
1790                 break;
1791         default:
1792                 data->type = w83781d;
1793                 data->name = "w83781d";
1794         }
1795
1796         /* Initialize the W83781D chip */
1797         w83781d_init_device(&pdev->dev);
1798
1799         /* Register sysfs hooks */
1800         err = w83781d_create_files(&pdev->dev, data->type, 1);
1801         if (err)
1802                 goto exit_remove_files;
1803
1804         err = device_create_file(&pdev->dev, &dev_attr_name);
1805         if (err)
1806                 goto exit_remove_files;
1807
1808         data->hwmon_dev = hwmon_device_register(&pdev->dev);
1809         if (IS_ERR(data->hwmon_dev)) {
1810                 err = PTR_ERR(data->hwmon_dev);
1811                 goto exit_remove_files;
1812         }
1813
1814         return 0;
1815
1816  exit_remove_files:
1817         w83781d_remove_files(&pdev->dev);
1818         device_remove_file(&pdev->dev, &dev_attr_name);
1819         return err;
1820 }
1821
1822 static int
1823 w83781d_isa_remove(struct platform_device *pdev)
1824 {
1825         struct w83781d_data *data = platform_get_drvdata(pdev);
1826
1827         hwmon_device_unregister(data->hwmon_dev);
1828         w83781d_remove_files(&pdev->dev);
1829         device_remove_file(&pdev->dev, &dev_attr_name);
1830
1831         return 0;
1832 }
1833
1834 static struct platform_driver w83781d_isa_driver = {
1835         .driver = {
1836                 .name = "w83781d",
1837         },
1838         .probe = w83781d_isa_probe,
1839         .remove = w83781d_isa_remove,
1840 };
1841
1842 /* return 1 if a supported chip is found, 0 otherwise */
1843 static int __init
1844 w83781d_isa_found(unsigned short address)
1845 {
1846         int val, save, found = 0;
1847         int port;
1848
1849         /*
1850          * Some boards declare base+0 to base+7 as a PNP device, some base+4
1851          * to base+7 and some base+5 to base+6. So we better request each port
1852          * individually for the probing phase.
1853          */
1854         for (port = address; port < address + W83781D_EXTENT; port++) {
1855                 if (!request_region(port, 1, "w83781d")) {
1856                         pr_debug("Failed to request port 0x%x\n", port);
1857                         goto release;
1858                 }
1859         }
1860
1861 #define REALLY_SLOW_IO
1862         /*
1863          * We need the timeouts for at least some W83781D-like
1864          * chips. But only if we read 'undefined' registers.
1865          */
1866         val = inb_p(address + 1);
1867         if (inb_p(address + 2) != val
1868          || inb_p(address + 3) != val
1869          || inb_p(address + 7) != val) {
1870                 pr_debug("Detection failed at step %d\n", 1);
1871                 goto release;
1872         }
1873 #undef REALLY_SLOW_IO
1874
1875         /*
1876          * We should be able to change the 7 LSB of the address port. The
1877          * MSB (busy flag) should be clear initially, set after the write.
1878          */
1879         save = inb_p(address + W83781D_ADDR_REG_OFFSET);
1880         if (save & 0x80) {
1881                 pr_debug("Detection failed at step %d\n", 2);
1882                 goto release;
1883         }
1884         val = ~save & 0x7f;
1885         outb_p(val, address + W83781D_ADDR_REG_OFFSET);
1886         if (inb_p(address + W83781D_ADDR_REG_OFFSET) != (val | 0x80)) {
1887                 outb_p(save, address + W83781D_ADDR_REG_OFFSET);
1888                 pr_debug("Detection failed at step %d\n", 3);
1889                 goto release;
1890         }
1891
1892         /* We found a device, now see if it could be a W83781D */
1893         outb_p(W83781D_REG_CONFIG, address + W83781D_ADDR_REG_OFFSET);
1894         val = inb_p(address + W83781D_DATA_REG_OFFSET);
1895         if (val & 0x80) {
1896                 pr_debug("Detection failed at step %d\n", 4);
1897                 goto release;
1898         }
1899         outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET);
1900         save = inb_p(address + W83781D_DATA_REG_OFFSET);
1901         outb_p(W83781D_REG_CHIPMAN, address + W83781D_ADDR_REG_OFFSET);
1902         val = inb_p(address + W83781D_DATA_REG_OFFSET);
1903         if ((!(save & 0x80) && (val != 0xa3))
1904          || ((save & 0x80) && (val != 0x5c))) {
1905                 pr_debug("Detection failed at step %d\n", 5);
1906                 goto release;
1907         }
1908         outb_p(W83781D_REG_I2C_ADDR, address + W83781D_ADDR_REG_OFFSET);
1909         val = inb_p(address + W83781D_DATA_REG_OFFSET);
1910         if (val < 0x03 || val > 0x77) { /* Not a valid I2C address */
1911                 pr_debug("Detection failed at step %d\n", 6);
1912                 goto release;
1913         }
1914
1915         /* The busy flag should be clear again */
1916         if (inb_p(address + W83781D_ADDR_REG_OFFSET) & 0x80) {
1917                 pr_debug("Detection failed at step %d\n", 7);
1918                 goto release;
1919         }
1920
1921         /* Determine the chip type */
1922         outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET);
1923         save = inb_p(address + W83781D_DATA_REG_OFFSET);
1924         outb_p(save & 0xf8, address + W83781D_DATA_REG_OFFSET);
1925         outb_p(W83781D_REG_WCHIPID, address + W83781D_ADDR_REG_OFFSET);
1926         val = inb_p(address + W83781D_DATA_REG_OFFSET);
1927         if ((val & 0xfe) == 0x10        /* W83781D */
1928          || val == 0x30)                /* W83782D */
1929                 found = 1;
1930
1931         if (found)
1932                 pr_info("Found a %s chip at %#x\n",
1933                         val == 0x30 ? "W83782D" : "W83781D", (int)address);
1934
1935  release:
1936         for (port--; port >= address; port--)
1937                 release_region(port, 1);
1938         return found;
1939 }
1940
1941 static int __init
1942 w83781d_isa_device_add(unsigned short address)
1943 {
1944         struct resource res = {
1945                 .start  = address,
1946                 .end    = address + W83781D_EXTENT - 1,
1947                 .name   = "w83781d",
1948                 .flags  = IORESOURCE_IO,
1949         };
1950         int err;
1951
1952         pdev = platform_device_alloc("w83781d", address);
1953         if (!pdev) {
1954                 err = -ENOMEM;
1955                 pr_err("Device allocation failed\n");
1956                 goto exit;
1957         }
1958
1959         err = platform_device_add_resources(pdev, &res, 1);
1960         if (err) {
1961                 pr_err("Device resource addition failed (%d)\n", err);
1962                 goto exit_device_put;
1963         }
1964
1965         err = platform_device_add(pdev);
1966         if (err) {
1967                 pr_err("Device addition failed (%d)\n", err);
1968                 goto exit_device_put;
1969         }
1970
1971         return 0;
1972
1973  exit_device_put:
1974         platform_device_put(pdev);
1975  exit:
1976         pdev = NULL;
1977         return err;
1978 }
1979
1980 static int __init
1981 w83781d_isa_register(void)
1982 {
1983         int res;
1984
1985         if (w83781d_isa_found(isa_address)) {
1986                 res = platform_driver_register(&w83781d_isa_driver);
1987                 if (res)
1988                         goto exit;
1989
1990                 /* Sets global pdev as a side effect */
1991                 res = w83781d_isa_device_add(isa_address);
1992                 if (res)
1993                         goto exit_unreg_isa_driver;
1994         }
1995
1996         return 0;
1997
1998 exit_unreg_isa_driver:
1999         platform_driver_unregister(&w83781d_isa_driver);
2000 exit:
2001         return res;
2002 }
2003
2004 static void
2005 w83781d_isa_unregister(void)
2006 {
2007         if (pdev) {
2008                 platform_device_unregister(pdev);
2009                 platform_driver_unregister(&w83781d_isa_driver);
2010         }
2011 }
2012 #else /* !CONFIG_ISA */
2013
2014 static struct w83781d_data *w83781d_data_if_isa(void)
2015 {
2016         return NULL;
2017 }
2018
2019 static int
2020 w83781d_alias_detect(struct i2c_client *client, u8 chipid)
2021 {
2022         return 0;
2023 }
2024
2025 static int
2026 w83781d_read_value(struct w83781d_data *data, u16 reg)
2027 {
2028         int res;
2029
2030         mutex_lock(&data->lock);
2031         res = w83781d_read_value_i2c(data, reg);
2032         mutex_unlock(&data->lock);
2033
2034         return res;
2035 }
2036
2037 static int
2038 w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
2039 {
2040         mutex_lock(&data->lock);
2041         w83781d_write_value_i2c(data, reg, value);
2042         mutex_unlock(&data->lock);
2043
2044         return 0;
2045 }
2046
2047 static int __init
2048 w83781d_isa_register(void)
2049 {
2050         return 0;
2051 }
2052
2053 static void
2054 w83781d_isa_unregister(void)
2055 {
2056 }
2057 #endif /* CONFIG_ISA */
2058
2059 static int __init
2060 sensors_w83781d_init(void)
2061 {
2062         int res;
2063
2064         /*
2065          * We register the ISA device first, so that we can skip the
2066          * registration of an I2C interface to the same device.
2067          */
2068         res = w83781d_isa_register();
2069         if (res)
2070                 goto exit;
2071
2072         res = i2c_add_driver(&w83781d_driver);
2073         if (res)
2074                 goto exit_unreg_isa;
2075
2076         return 0;
2077
2078  exit_unreg_isa:
2079         w83781d_isa_unregister();
2080  exit:
2081         return res;
2082 }
2083
2084 static void __exit
2085 sensors_w83781d_exit(void)
2086 {
2087         w83781d_isa_unregister();
2088         i2c_del_driver(&w83781d_driver);
2089 }
2090
2091 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
2092               "Philip Edelbrock <phil@netroedge.com>, "
2093               "and Mark Studebaker <mdsxyz123@yahoo.com>");
2094 MODULE_DESCRIPTION("W83781D driver");
2095 MODULE_LICENSE("GPL");
2096
2097 module_init(sensors_w83781d_init);
2098 module_exit(sensors_w83781d_exit);