linux/drivers/hwmon/w83781d.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * w83781d.c - Part of lm_sensors, Linux kernel modules for hardware
   4 *             monitoring
   5 * Copyright (c) 1998 - 2001  Frodo Looijaard <frodol@dds.nl>,
   6 *                            Philip Edelbrock <phil@netroedge.com>,
   7 *                            and Mark Studebaker <mdsxyz123@yahoo.com>
   8 * Copyright (c) 2007 - 2008  Jean Delvare <jdelvare@suse.de>
   9 */
  10
  11/*
  12 * Supports following chips:
  13 *
  14 * Chip         #vin    #fanin  #pwm    #temp   wchipid vendid  i2c     ISA
  15 * as99127f     7       3       0       3       0x31    0x12c3  yes     no
  16 * as99127f rev.2 (type_name = as99127f)        0x31    0x5ca3  yes     no
  17 * w83781d      7       3       0       3       0x10-1  0x5ca3  yes     yes
  18 * w83782d      9       3       2-4     3       0x30    0x5ca3  yes     yes
  19 * w83783s      5-6     3       2       1-2     0x40    0x5ca3  yes     no
  20 *
  21 */
  22
  23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  24
  25#include <linux/module.h>
  26#include <linux/init.h>
  27#include <linux/slab.h>
  28#include <linux/jiffies.h>
  29#include <linux/i2c.h>
  30#include <linux/hwmon.h>
  31#include <linux/hwmon-vid.h>
  32#include <linux/hwmon-sysfs.h>
  33#include <linux/sysfs.h>
  34#include <linux/err.h>
  35#include <linux/mutex.h>
  36
  37#ifdef CONFIG_ISA
  38#include <linux/platform_device.h>
  39#include <linux/ioport.h>
  40#include <linux/io.h>
  41#endif
  42
  43#include "lm75.h"
  44
  45/* Addresses to scan */
  46static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
  47                                                0x2e, 0x2f, I2C_CLIENT_END };
  48
  49enum chips { w83781d, w83782d, w83783s, as99127f };
  50
  51/* Insmod parameters */
  52static unsigned short force_subclients[4];
  53module_param_array(force_subclients, short, NULL, 0);
  54MODULE_PARM_DESC(force_subclients,
  55                 "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");
  56
  57static bool reset;
  58module_param(reset, bool, 0);
  59MODULE_PARM_DESC(reset, "Set to one to reset chip on load");
  60
  61static bool init = 1;
  62module_param(init, bool, 0);
  63MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization");
  64
  65/* Constants specified below */
  66
  67/* Length of ISA address segment */
  68#define W83781D_EXTENT                  8
  69
  70/* Where are the ISA address/data registers relative to the base address */
  71#define W83781D_ADDR_REG_OFFSET         5
  72#define W83781D_DATA_REG_OFFSET         6
  73
  74/* The device registers */
  75/* in nr from 0 to 8 */
  76#define W83781D_REG_IN_MAX(nr)          ((nr < 7) ? (0x2b + (nr) * 2) : \
  77                                                    (0x554 + (((nr) - 7) * 2)))
  78#define W83781D_REG_IN_MIN(nr)          ((nr < 7) ? (0x2c + (nr) * 2) : \
  79                                                    (0x555 + (((nr) - 7) * 2)))
  80#define W83781D_REG_IN(nr)              ((nr < 7) ? (0x20 + (nr)) : \
  81                                                    (0x550 + (nr) - 7))
  82
  83/* fan nr from 0 to 2 */
  84#define W83781D_REG_FAN_MIN(nr)         (0x3b + (nr))
  85#define W83781D_REG_FAN(nr)             (0x28 + (nr))
  86
  87#define W83781D_REG_BANK                0x4E
  88#define W83781D_REG_TEMP2_CONFIG        0x152
  89#define W83781D_REG_TEMP3_CONFIG        0x252
  90/* temp nr from 1 to 3 */
  91#define W83781D_REG_TEMP(nr)            ((nr == 3) ? (0x0250) : \
  92                                        ((nr == 2) ? (0x0150) : \
  93                                                     (0x27)))
  94#define W83781D_REG_TEMP_HYST(nr)       ((nr == 3) ? (0x253) : \
  95                                        ((nr == 2) ? (0x153) : \
  96                                                     (0x3A)))
  97#define W83781D_REG_TEMP_OVER(nr)       ((nr == 3) ? (0x255) : \
  98                                        ((nr == 2) ? (0x155) : \
  99                                                     (0x39)))
 100
 101#define W83781D_REG_CONFIG              0x40
 102
 103/* Interrupt status (W83781D, AS99127F) */
 104#define W83781D_REG_ALARM1              0x41
 105#define W83781D_REG_ALARM2              0x42
 106
 107/* Real-time status (W83782D, W83783S) */
 108#define W83782D_REG_ALARM1              0x459
 109#define W83782D_REG_ALARM2              0x45A
 110#define W83782D_REG_ALARM3              0x45B
 111
 112#define W83781D_REG_BEEP_CONFIG         0x4D
 113#define W83781D_REG_BEEP_INTS1          0x56
 114#define W83781D_REG_BEEP_INTS2          0x57
 115#define W83781D_REG_BEEP_INTS3          0x453   /* not on W83781D */
 116
 117#define W83781D_REG_VID_FANDIV          0x47
 118
 119#define W83781D_REG_CHIPID              0x49
 120#define W83781D_REG_WCHIPID             0x58
 121#define W83781D_REG_CHIPMAN             0x4F
 122#define W83781D_REG_PIN                 0x4B
 123
 124/* 782D/783S only */
 125#define W83781D_REG_VBAT                0x5D
 126
 127/* PWM 782D (1-4) and 783S (1-2) only */
 128static const u8 W83781D_REG_PWM[] = { 0x5B, 0x5A, 0x5E, 0x5F };
 129#define W83781D_REG_PWMCLK12            0x5C
 130#define W83781D_REG_PWMCLK34            0x45C
 131
 132#define W83781D_REG_I2C_ADDR            0x48
 133#define W83781D_REG_I2C_SUBADDR         0x4A
 134
 135/*
 136 * The following are undocumented in the data sheets however we
 137 * received the information in an email from Winbond tech support
 138 */
 139/* Sensor selection - not on 781d */
 140#define W83781D_REG_SCFG1               0x5D
 141static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 };
 142
 143#define W83781D_REG_SCFG2               0x59
 144static const u8 BIT_SCFG2[] = { 0x10, 0x20, 0x40 };
 145
 146#define W83781D_DEFAULT_BETA            3435
 147
 148/* Conversions */
 149#define IN_TO_REG(val)                  clamp_val(((val) + 8) / 16, 0, 255)
 150#define IN_FROM_REG(val)                ((val) * 16)
 151
 152static inline u8
 153FAN_TO_REG(long rpm, int div)
 154{
 155        if (rpm == 0)
 156                return 255;
 157        rpm = clamp_val(rpm, 1, 1000000);
 158        return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
 159}
 160
 161static inline long
 162FAN_FROM_REG(u8 val, int div)
 163{
 164        if (val == 0)
 165                return -1;
 166        if (val == 255)
 167                return 0;
 168        return 1350000 / (val * div);
 169}
 170
 171#define TEMP_TO_REG(val)                clamp_val((val) / 1000, -127, 128)
 172#define TEMP_FROM_REG(val)              ((val) * 1000)
 173
 174#define BEEP_MASK_FROM_REG(val, type)   ((type) == as99127f ? \
 175                                         (~(val)) & 0x7fff : (val) & 0xff7fff)
 176#define BEEP_MASK_TO_REG(val, type)     ((type) == as99127f ? \
 177                                         (~(val)) & 0x7fff : (val) & 0xff7fff)
 178
 179#define DIV_FROM_REG(val)               (1 << (val))
 180
 181static inline u8
 182DIV_TO_REG(long val, enum chips type)
 183{
 184        int i;
 185        val = clamp_val(val, 1,
 186                        ((type == w83781d || type == as99127f) ? 8 : 128)) >> 1;
 187        for (i = 0; i < 7; i++) {
 188                if (val == 0)
 189                        break;
 190                val >>= 1;
 191        }
 192        return i;
 193}
 194
 195struct w83781d_data {
 196        struct i2c_client *client;
 197        struct device *hwmon_dev;
 198        struct mutex lock;
 199        enum chips type;
 200
 201        /* For ISA device only */
 202        const char *name;
 203        int isa_addr;
 204
 205        struct mutex update_lock;
 206        char valid;             /* !=0 if following fields are valid */
 207        unsigned long last_updated;     /* In jiffies */
 208
 209        struct i2c_client *lm75[2];     /* for secondary I2C addresses */
 210        /* array of 2 pointers to subclients */
 211
 212        u8 in[9];               /* Register value - 8 & 9 for 782D only */
 213        u8 in_max[9];           /* Register value - 8 & 9 for 782D only */
 214        u8 in_min[9];           /* Register value - 8 & 9 for 782D only */
 215        u8 fan[3];              /* Register value */
 216        u8 fan_min[3];          /* Register value */
 217        s8 temp;                /* Register value */
 218        s8 temp_max;            /* Register value */
 219        s8 temp_max_hyst;       /* Register value */
 220        u16 temp_add[2];        /* Register value */
 221        u16 temp_max_add[2];    /* Register value */
 222        u16 temp_max_hyst_add[2];       /* Register value */
 223        u8 fan_div[3];          /* Register encoding, shifted right */
 224        u8 vid;                 /* Register encoding, combined */
 225        u32 alarms;             /* Register encoding, combined */
 226        u32 beep_mask;          /* Register encoding, combined */
 227        u8 pwm[4];              /* Register value */
 228        u8 pwm2_enable;         /* Boolean */
 229        u16 sens[3];            /*
 230                                 * 782D/783S only.
 231                                 * 1 = pentium diode; 2 = 3904 diode;
 232                                 * 4 = thermistor
 233                                 */
 234        u8 vrm;
 235};
 236
 237static struct w83781d_data *w83781d_data_if_isa(void);
 238static int w83781d_alias_detect(struct i2c_client *client, u8 chipid);
 239
 240static int w83781d_read_value(struct w83781d_data *data, u16 reg);
 241static int w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value);
 242static struct w83781d_data *w83781d_update_device(struct device *dev);
 243static void w83781d_init_device(struct device *dev);
 244
 245/* following are the sysfs callback functions */
 246#define show_in_reg(reg) \
 247static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \
 248                char *buf) \
 249{ \
 250        struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 251        struct w83781d_data *data = w83781d_update_device(dev); \
 252        return sprintf(buf, "%ld\n", \
 253                       (long)IN_FROM_REG(data->reg[attr->index])); \
 254}
 255show_in_reg(in);
 256show_in_reg(in_min);
 257show_in_reg(in_max);
 258
 259#define store_in_reg(REG, reg) \
 260static ssize_t store_in_##reg(struct device *dev, struct device_attribute \
 261                *da, const char *buf, size_t count) \
 262{ \
 263        struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 264        struct w83781d_data *data = dev_get_drvdata(dev); \
 265        int nr = attr->index; \
 266        unsigned long val; \
 267        int err = kstrtoul(buf, 10, &val); \
 268        if (err) \
 269                return err; \
 270        mutex_lock(&data->update_lock); \
 271        data->in_##reg[nr] = IN_TO_REG(val); \
 272        w83781d_write_value(data, W83781D_REG_IN_##REG(nr), \
 273                            data->in_##reg[nr]); \
 274        \
 275        mutex_unlock(&data->update_lock); \
 276        return count; \
 277}
 278store_in_reg(MIN, min);
 279store_in_reg(MAX, max);
 280
 281#define sysfs_in_offsets(offset) \
 282static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
 283                show_in, NULL, offset); \
 284static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
 285                show_in_min, store_in_min, offset); \
 286static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
 287                show_in_max, store_in_max, offset)
 288
 289sysfs_in_offsets(0);
 290sysfs_in_offsets(1);
 291sysfs_in_offsets(2);
 292sysfs_in_offsets(3);
 293sysfs_in_offsets(4);
 294sysfs_in_offsets(5);
 295sysfs_in_offsets(6);
 296sysfs_in_offsets(7);
 297sysfs_in_offsets(8);
 298
 299#define show_fan_reg(reg) \
 300static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \
 301                char *buf) \
 302{ \
 303        struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 304        struct w83781d_data *data = w83781d_update_device(dev); \
 305        return sprintf(buf, "%ld\n", \
 306                FAN_FROM_REG(data->reg[attr->index], \
 307                        DIV_FROM_REG(data->fan_div[attr->index]))); \
 308}
 309show_fan_reg(fan);
 310show_fan_reg(fan_min);
 311
 312static ssize_t
 313store_fan_min(struct device *dev, struct device_attribute *da,
 314                const char *buf, size_t count)
 315{
 316        struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 317        struct w83781d_data *data = dev_get_drvdata(dev);
 318        int nr = attr->index;
 319        unsigned long val;
 320        int err;
 321
 322        err = kstrtoul(buf, 10, &val);
 323        if (err)
 324                return err;
 325
 326        mutex_lock(&data->update_lock);
 327        data->fan_min[nr] =
 328            FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 329        w83781d_write_value(data, W83781D_REG_FAN_MIN(nr),
 330                            data->fan_min[nr]);
 331
 332        mutex_unlock(&data->update_lock);
 333        return count;
 334}
 335
 336static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 337static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
 338                show_fan_min, store_fan_min, 0);
 339static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
 340static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
 341                show_fan_min, store_fan_min, 1);
 342static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
 343static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO | S_IWUSR,
 344                show_fan_min, store_fan_min, 2);
 345
 346#define show_temp_reg(reg) \
 347static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \
 348                char *buf) \
 349{ \
 350        struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 351        struct w83781d_data *data = w83781d_update_device(dev); \
 352        int nr = attr->index; \
 353        if (nr >= 2) {  /* TEMP2 and TEMP3 */ \
 354                return sprintf(buf, "%d\n", \
 355                        LM75_TEMP_FROM_REG(data->reg##_add[nr-2])); \
 356        } else {        /* TEMP1 */ \
 357                return sprintf(buf, "%ld\n", (long)TEMP_FROM_REG(data->reg)); \
 358        } \
 359}
 360show_temp_reg(temp);
 361show_temp_reg(temp_max);
 362show_temp_reg(temp_max_hyst);
 363
 364#define store_temp_reg(REG, reg) \
 365static ssize_t store_temp_##reg(struct device *dev, \
 366                struct device_attribute *da, const char *buf, size_t count) \
 367{ \
 368        struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 369        struct w83781d_data *data = dev_get_drvdata(dev); \
 370        int nr = attr->index; \
 371        long val; \
 372        int err = kstrtol(buf, 10, &val); \
 373        if (err) \
 374                return err; \
 375        mutex_lock(&data->update_lock); \
 376         \
 377        if (nr >= 2) {  /* TEMP2 and TEMP3 */ \
 378                data->temp_##reg##_add[nr-2] = LM75_TEMP_TO_REG(val); \
 379                w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \
 380                                data->temp_##reg##_add[nr-2]); \
 381        } else {        /* TEMP1 */ \
 382                data->temp_##reg = TEMP_TO_REG(val); \
 383                w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \
 384                        data->temp_##reg); \
 385        } \
 386         \
 387        mutex_unlock(&data->update_lock); \
 388        return count; \
 389}
 390store_temp_reg(OVER, max);
 391store_temp_reg(HYST, max_hyst);
 392
 393#define sysfs_temp_offsets(offset) \
 394static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
 395                show_temp, NULL, offset); \
 396static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
 397                show_temp_max, store_temp_max, offset); \
 398static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
 399                show_temp_max_hyst, store_temp_max_hyst, offset);
 400
 401sysfs_temp_offsets(1);
 402sysfs_temp_offsets(2);
 403sysfs_temp_offsets(3);
 404
 405static ssize_t
 406cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf)
 407{
 408        struct w83781d_data *data = w83781d_update_device(dev);
 409        return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
 410}
 411
 412static DEVICE_ATTR_RO(cpu0_vid);
 413
 414static ssize_t
 415vrm_show(struct device *dev, struct device_attribute *attr, char *buf)
 416{
 417        struct w83781d_data *data = dev_get_drvdata(dev);
 418        return sprintf(buf, "%ld\n", (long) data->vrm);
 419}
 420
 421static ssize_t
 422vrm_store(struct device *dev, struct device_attribute *attr, const char *buf,
 423          size_t count)
 424{
 425        struct w83781d_data *data = dev_get_drvdata(dev);
 426        unsigned long val;
 427        int err;
 428
 429        err = kstrtoul(buf, 10, &val);
 430        if (err)
 431                return err;
 432        data->vrm = clamp_val(val, 0, 255);
 433
 434        return count;
 435}
 436
 437static DEVICE_ATTR_RW(vrm);
 438
 439static ssize_t
 440alarms_show(struct device *dev, struct device_attribute *attr, char *buf)
 441{
 442        struct w83781d_data *data = w83781d_update_device(dev);
 443        return sprintf(buf, "%u\n", data->alarms);
 444}
 445
 446static DEVICE_ATTR_RO(alarms);
 447
 448static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
 449                char *buf)
 450{
 451        struct w83781d_data *data = w83781d_update_device(dev);
 452        int bitnr = to_sensor_dev_attr(attr)->index;
 453        return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 454}
 455
 456/* The W83781D has a single alarm bit for temp2 and temp3 */
 457static ssize_t show_temp3_alarm(struct device *dev,
 458                struct device_attribute *attr, char *buf)
 459{
 460        struct w83781d_data *data = w83781d_update_device(dev);
 461        int bitnr = (data->type == w83781d) ? 5 : 13;
 462        return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 463}
 464
 465static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 466static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 467static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 468static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 469static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
 470static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
 471static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10);
 472static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 16);
 473static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 17);
 474static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
 475static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
 476static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11);
 477static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
 478static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
 479static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_temp3_alarm, NULL, 0);
 480
 481static ssize_t beep_mask_show(struct device *dev,
 482                               struct device_attribute *attr, char *buf)
 483{
 484        struct w83781d_data *data = w83781d_update_device(dev);
 485        return sprintf(buf, "%ld\n",
 486                       (long)BEEP_MASK_FROM_REG(data->beep_mask, data->type));
 487}
 488
 489static ssize_t
 490beep_mask_store(struct device *dev, struct device_attribute *attr,
 491                const char *buf, size_t count)
 492{
 493        struct w83781d_data *data = dev_get_drvdata(dev);
 494        unsigned long val;
 495        int err;
 496
 497        err = kstrtoul(buf, 10, &val);
 498        if (err)
 499                return err;
 500
 501        mutex_lock(&data->update_lock);
 502        data->beep_mask &= 0x8000; /* preserve beep enable */
 503        data->beep_mask |= BEEP_MASK_TO_REG(val, data->type);
 504        w83781d_write_value(data, W83781D_REG_BEEP_INTS1,
 505                            data->beep_mask & 0xff);
 506        w83781d_write_value(data, W83781D_REG_BEEP_INTS2,
 507                            (data->beep_mask >> 8) & 0xff);
 508        if (data->type != w83781d && data->type != as99127f) {
 509                w83781d_write_value(data, W83781D_REG_BEEP_INTS3,
 510                                    ((data->beep_mask) >> 16) & 0xff);
 511        }
 512        mutex_unlock(&data->update_lock);
 513
 514        return count;
 515}
 516
 517static DEVICE_ATTR_RW(beep_mask);
 518
 519static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
 520                char *buf)
 521{
 522        struct w83781d_data *data = w83781d_update_device(dev);
 523        int bitnr = to_sensor_dev_attr(attr)->index;
 524        return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
 525}
 526
 527static ssize_t
 528store_beep(struct device *dev, struct device_attribute *attr,
 529                const char *buf, size_t count)
 530{
 531        struct w83781d_data *data = dev_get_drvdata(dev);
 532        int bitnr = to_sensor_dev_attr(attr)->index;
 533        u8 reg;
 534        unsigned long bit;
 535        int err;
 536
 537        err = kstrtoul(buf, 10, &bit);
 538        if (err)
 539                return err;
 540
 541        if (bit & ~1)
 542                return -EINVAL;
 543
 544        mutex_lock(&data->update_lock);
 545        if (bit)
 546                data->beep_mask |= (1 << bitnr);
 547        else
 548                data->beep_mask &= ~(1 << bitnr);
 549
 550        if (bitnr < 8) {
 551                reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS1);
 552                if (bit)
 553                        reg |= (1 << bitnr);
 554                else
 555                        reg &= ~(1 << bitnr);
 556                w83781d_write_value(data, W83781D_REG_BEEP_INTS1, reg);
 557        } else if (bitnr < 16) {
 558                reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS2);
 559                if (bit)
 560                        reg |= (1 << (bitnr - 8));
 561                else
 562                        reg &= ~(1 << (bitnr - 8));
 563                w83781d_write_value(data, W83781D_REG_BEEP_INTS2, reg);
 564        } else {
 565                reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS3);
 566                if (bit)
 567                        reg |= (1 << (bitnr - 16));
 568                else
 569                        reg &= ~(1 << (bitnr - 16));
 570                w83781d_write_value(data, W83781D_REG_BEEP_INTS3, reg);
 571        }
 572        mutex_unlock(&data->update_lock);
 573
 574        return count;
 575}
 576
 577/* The W83781D has a single beep bit for temp2 and temp3 */
 578static ssize_t show_temp3_beep(struct device *dev,
 579                struct device_attribute *attr, char *buf)
 580{
 581        struct w83781d_data *data = w83781d_update_device(dev);
 582        int bitnr = (data->type == w83781d) ? 5 : 13;
 583        return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
 584}
 585
 586static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
 587                        show_beep, store_beep, 0);
 588static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR,
 589                        show_beep, store_beep, 1);
 590static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR,
 591                        show_beep, store_beep, 2);
 592static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR,
 593                        show_beep, store_beep, 3);
 594static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR,
 595                        show_beep, store_beep, 8);
 596static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO | S_IWUSR,
 597                        show_beep, store_beep, 9);
 598static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO | S_IWUSR,
 599                        show_beep, store_beep, 10);
 600static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO | S_IWUSR,
 601                        show_beep, store_beep, 16);
 602static SENSOR_DEVICE_ATTR(in8_beep, S_IRUGO | S_IWUSR,
 603                        show_beep, store_beep, 17);
 604static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR,
 605                        show_beep, store_beep, 6);
 606static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR,
 607                        show_beep, store_beep, 7);
 608static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO | S_IWUSR,
 609                        show_beep, store_beep, 11);
 610static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
 611                        show_beep, store_beep, 4);
 612static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR,
 613                        show_beep, store_beep, 5);
 614static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO,
 615                        show_temp3_beep, store_beep, 13);
 616static SENSOR_DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
 617                        show_beep, store_beep, 15);
 618
 619static ssize_t
 620show_fan_div(struct device *dev, struct device_attribute *da, char *buf)
 621{
 622        struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 623        struct w83781d_data *data = w83781d_update_device(dev);
 624        return sprintf(buf, "%ld\n",
 625                       (long) DIV_FROM_REG(data->fan_div[attr->index]));
 626}
 627
 628/*
 629 * Note: we save and restore the fan minimum here, because its value is
 630 * determined in part by the fan divisor.  This follows the principle of
 631 * least surprise; the user doesn't expect the fan minimum to change just
 632 * because the divisor changed.
 633 */
 634static ssize_t
 635store_fan_div(struct device *dev, struct device_attribute *da,
 636                const char *buf, size_t count)
 637{
 638        struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 639        struct w83781d_data *data = dev_get_drvdata(dev);
 640        unsigned long min;
 641        int nr = attr->index;
 642        u8 reg;
 643        unsigned long val;
 644        int err;
 645
 646        err = kstrtoul(buf, 10, &val);
 647        if (err)
 648                return err;
 649
 650        mutex_lock(&data->update_lock);
 651
 652        /* Save fan_min */
 653        min = FAN_FROM_REG(data->fan_min[nr],
 654                           DIV_FROM_REG(data->fan_div[nr]));
 655
 656        data->fan_div[nr] = DIV_TO_REG(val, data->type);
 657
 658        reg = (w83781d_read_value(data, nr == 2 ?
 659                                  W83781D_REG_PIN : W83781D_REG_VID_FANDIV)
 660                & (nr == 0 ? 0xcf : 0x3f))
 661              | ((data->fan_div[nr] & 0x03) << (nr == 0 ? 4 : 6));
 662        w83781d_write_value(data, nr == 2 ?
 663                            W83781D_REG_PIN : W83781D_REG_VID_FANDIV, reg);
 664
 665        /* w83781d and as99127f don't have extended divisor bits */
 666        if (data->type != w83781d && data->type != as99127f) {
 667                reg = (w83781d_read_value(data, W83781D_REG_VBAT)
 668                       & ~(1 << (5 + nr)))
 669                    | ((data->fan_div[nr] & 0x04) << (3 + nr));
 670                w83781d_write_value(data, W83781D_REG_VBAT, reg);
 671        }
 672
 673        /* Restore fan_min */
 674        data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 675        w83781d_write_value(data, W83781D_REG_FAN_MIN(nr), data->fan_min[nr]);
 676
 677        mutex_unlock(&data->update_lock);
 678        return count;
 679}
 680
 681static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
 682                show_fan_div, store_fan_div, 0);
 683static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
 684                show_fan_div, store_fan_div, 1);
 685static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR,
 686                show_fan_div, store_fan_div, 2);
 687
 688static ssize_t
 689show_pwm(struct device *dev, struct device_attribute *da, char *buf)
 690{
 691        struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 692        struct w83781d_data *data = w83781d_update_device(dev);
 693        return sprintf(buf, "%d\n", (int)data->pwm[attr->index]);
 694}
 695
 696static ssize_t
 697pwm2_enable_show(struct device *dev, struct device_attribute *da, char *buf)
 698{
 699        struct w83781d_data *data = w83781d_update_device(dev);
 700        return sprintf(buf, "%d\n", (int)data->pwm2_enable);
 701}
 702
 703static ssize_t
 704store_pwm(struct device *dev, struct device_attribute *da, const char *buf,
 705                size_t count)
 706{
 707        struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 708        struct w83781d_data *data = dev_get_drvdata(dev);
 709        int nr = attr->index;
 710        unsigned long val;
 711        int err;
 712
 713        err = kstrtoul(buf, 10, &val);
 714        if (err)
 715                return err;
 716
 717        mutex_lock(&data->update_lock);
 718        data->pwm[nr] = clamp_val(val, 0, 255);
 719        w83781d_write_value(data, W83781D_REG_PWM[nr], data->pwm[nr]);
 720        mutex_unlock(&data->update_lock);
 721        return count;
 722}
 723
 724static ssize_t
 725pwm2_enable_store(struct device *dev, struct device_attribute *da,
 726                const char *buf, size_t count)
 727{
 728        struct w83781d_data *data = dev_get_drvdata(dev);
 729        unsigned long val;
 730        u32 reg;
 731        int err;
 732
 733        err = kstrtoul(buf, 10, &val);
 734        if (err)
 735                return err;
 736
 737        mutex_lock(&data->update_lock);
 738
 739        switch (val) {
 740        case 0:
 741        case 1:
 742                reg = w83781d_read_value(data, W83781D_REG_PWMCLK12);
 743                w83781d_write_value(data, W83781D_REG_PWMCLK12,
 744                                    (reg & 0xf7) | (val << 3));
 745
 746                reg = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
 747                w83781d_write_value(data, W83781D_REG_BEEP_CONFIG,
 748                                    (reg & 0xef) | (!val << 4));
 749
 750                data->pwm2_enable = val;
 751                break;
 752
 753        default:
 754                mutex_unlock(&data->update_lock);
 755                return -EINVAL;
 756        }
 757
 758        mutex_unlock(&data->update_lock);
 759        return count;
 760}
 761
 762static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0);
 763static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 1);
 764static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 2);
 765static SENSOR_DEVICE_ATTR(pwm4, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 3);
 766/* only PWM2 can be enabled/disabled */
 767static DEVICE_ATTR_RW(pwm2_enable);
 768
 769static ssize_t
 770show_sensor(struct device *dev, struct device_attribute *da, char *buf)
 771{
 772        struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 773        struct w83781d_data *data = w83781d_update_device(dev);
 774        return sprintf(buf, "%d\n", (int)data->sens[attr->index]);
 775}
 776
 777static ssize_t
 778store_sensor(struct device *dev, struct device_attribute *da,
 779                const char *buf, size_t count)
 780{
 781        struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 782        struct w83781d_data *data = dev_get_drvdata(dev);
 783        int nr = attr->index;
 784        unsigned long val;
 785        u32 tmp;
 786        int err;
 787
 788        err = kstrtoul(buf, 10, &val);
 789        if (err)
 790                return err;
 791
 792        mutex_lock(&data->update_lock);
 793
 794        switch (val) {
 795        case 1:         /* PII/Celeron diode */
 796                tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
 797                w83781d_write_value(data, W83781D_REG_SCFG1,
 798                                    tmp | BIT_SCFG1[nr]);
 799                tmp = w83781d_read_value(data, W83781D_REG_SCFG2);
 800                w83781d_write_value(data, W83781D_REG_SCFG2,
 801                                    tmp | BIT_SCFG2[nr]);
 802                data->sens[nr] = val;
 803                break;
 804        case 2:         /* 3904 */
 805                tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
 806                w83781d_write_value(data, W83781D_REG_SCFG1,
 807                                    tmp | BIT_SCFG1[nr]);
 808                tmp = w83781d_read_value(data, W83781D_REG_SCFG2);
 809                w83781d_write_value(data, W83781D_REG_SCFG2,
 810                                    tmp & ~BIT_SCFG2[nr]);
 811                data->sens[nr] = val;
 812                break;
 813        case W83781D_DEFAULT_BETA:
 814                dev_warn(dev,
 815                         "Sensor type %d is deprecated, please use 4 instead\n",
 816                         W83781D_DEFAULT_BETA);
 817                /* fall through */
 818        case 4:         /* thermistor */
 819                tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
 820                w83781d_write_value(data, W83781D_REG_SCFG1,
 821                                    tmp & ~BIT_SCFG1[nr]);
 822                data->sens[nr] = val;
 823                break;
 824        default:
 825                dev_err(dev, "Invalid sensor type %ld; must be 1, 2, or 4\n",
 826                       (long) val);
 827                break;
 828        }
 829
 830        mutex_unlock(&data->update_lock);
 831        return count;
 832}
 833
 834static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR,
 835        show_sensor, store_sensor, 0);
 836static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR,
 837        show_sensor, store_sensor, 1);
 838static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR,
 839        show_sensor, store_sensor, 2);
 840
 841/*
 842 * Assumes that adapter is of I2C, not ISA variety.
 843 * OTHERWISE DON'T CALL THIS
 844 */
 845static int
 846w83781d_detect_subclients(struct i2c_client *new_client)
 847{
 848        int i, val1 = 0, id;
 849        int err;
 850        int address = new_client->addr;
 851        unsigned short sc_addr[2];
 852        struct i2c_adapter *adapter = new_client->adapter;
 853        struct w83781d_data *data = i2c_get_clientdata(new_client);
 854        enum chips kind = data->type;
 855        int num_sc = 1;
 856
 857        id = i2c_adapter_id(adapter);
 858
 859        if (force_subclients[0] == id && force_subclients[1] == address) {
 860                for (i = 2; i <= 3; i++) {
 861                        if (force_subclients[i] < 0x48 ||
 862                            force_subclients[i] > 0x4f) {
 863                                dev_err(&new_client->dev,
 864                                        "Invalid subclient address %d; must be 0x48-0x4f\n",
 865                                        force_subclients[i]);
 866                                err = -EINVAL;
 867                                goto ERROR_SC_1;
 868                        }
 869                }
 870                w83781d_write_value(data, W83781D_REG_I2C_SUBADDR,
 871                                (force_subclients[2] & 0x07) |
 872                                ((force_subclients[3] & 0x07) << 4));
 873                sc_addr[0] = force_subclients[2];
 874        } else {
 875                val1 = w83781d_read_value(data, W83781D_REG_I2C_SUBADDR);
 876                sc_addr[0] = 0x48 + (val1 & 0x07);
 877        }
 878
 879        if (kind != w83783s) {
 880                num_sc = 2;
 881                if (force_subclients[0] == id &&
 882                    force_subclients[1] == address) {
 883                        sc_addr[1] = force_subclients[3];
 884                } else {
 885                        sc_addr[1] = 0x48 + ((val1 >> 4) & 0x07);
 886                }
 887                if (sc_addr[0] == sc_addr[1]) {
 888                        dev_err(&new_client->dev,
 889                               "Duplicate addresses 0x%x for subclients.\n",
 890                               sc_addr[0]);
 891                        err = -EBUSY;
 892                        goto ERROR_SC_2;
 893                }
 894        }
 895
 896        for (i = 0; i < num_sc; i++) {
 897                data->lm75[i] = i2c_new_dummy_device(adapter, sc_addr[i]);
 898                if (IS_ERR(data->lm75[i])) {
 899                        dev_err(&new_client->dev,
 900                                "Subclient %d registration at address 0x%x failed.\n",
 901                                i, sc_addr[i]);
 902                        err = PTR_ERR(data->lm75[i]);
 903                        if (i == 1)
 904                                goto ERROR_SC_3;
 905                        goto ERROR_SC_2;
 906                }
 907        }
 908
 909        return 0;
 910
 911/* Undo inits in case of errors */
 912ERROR_SC_3:
 913        i2c_unregister_device(data->lm75[0]);
 914ERROR_SC_2:
 915ERROR_SC_1:
 916        return err;
 917}
 918
 919#define IN_UNIT_ATTRS(X)                                        \
 920        &sensor_dev_attr_in##X##_input.dev_attr.attr,           \
 921        &sensor_dev_attr_in##X##_min.dev_attr.attr,             \
 922        &sensor_dev_attr_in##X##_max.dev_attr.attr,             \
 923        &sensor_dev_attr_in##X##_alarm.dev_attr.attr,           \
 924        &sensor_dev_attr_in##X##_beep.dev_attr.attr
 925
 926#define FAN_UNIT_ATTRS(X)                                       \
 927        &sensor_dev_attr_fan##X##_input.dev_attr.attr,          \
 928        &sensor_dev_attr_fan##X##_min.dev_attr.attr,            \
 929        &sensor_dev_attr_fan##X##_div.dev_attr.attr,            \
 930        &sensor_dev_attr_fan##X##_alarm.dev_attr.attr,          \
 931        &sensor_dev_attr_fan##X##_beep.dev_attr.attr
 932
 933#define TEMP_UNIT_ATTRS(X)                                      \
 934        &sensor_dev_attr_temp##X##_input.dev_attr.attr,         \
 935        &sensor_dev_attr_temp##X##_max.dev_attr.attr,           \
 936        &sensor_dev_attr_temp##X##_max_hyst.dev_attr.attr,      \
 937        &sensor_dev_attr_temp##X##_alarm.dev_attr.attr,         \
 938        &sensor_dev_attr_temp##X##_beep.dev_attr.attr
 939
 940static struct attribute *w83781d_attributes[] = {
 941        IN_UNIT_ATTRS(0),
 942        IN_UNIT_ATTRS(2),
 943        IN_UNIT_ATTRS(3),
 944        IN_UNIT_ATTRS(4),
 945        IN_UNIT_ATTRS(5),
 946        IN_UNIT_ATTRS(6),
 947        FAN_UNIT_ATTRS(1),
 948        FAN_UNIT_ATTRS(2),
 949        FAN_UNIT_ATTRS(3),
 950        TEMP_UNIT_ATTRS(1),
 951        TEMP_UNIT_ATTRS(2),
 952        &dev_attr_cpu0_vid.attr,
 953        &dev_attr_vrm.attr,
 954        &dev_attr_alarms.attr,
 955        &dev_attr_beep_mask.attr,
 956        &sensor_dev_attr_beep_enable.dev_attr.attr,
 957        NULL
 958};
 959static const struct attribute_group w83781d_group = {
 960        .attrs = w83781d_attributes,
 961};
 962
 963static struct attribute *w83781d_attributes_in1[] = {
 964        IN_UNIT_ATTRS(1),
 965        NULL
 966};
 967static const struct attribute_group w83781d_group_in1 = {
 968        .attrs = w83781d_attributes_in1,
 969};
 970
 971static struct attribute *w83781d_attributes_in78[] = {
 972        IN_UNIT_ATTRS(7),
 973        IN_UNIT_ATTRS(8),
 974        NULL
 975};
 976static const struct attribute_group w83781d_group_in78 = {
 977        .attrs = w83781d_attributes_in78,
 978};
 979
 980static struct attribute *w83781d_attributes_temp3[] = {
 981        TEMP_UNIT_ATTRS(3),
 982        NULL
 983};
 984static const struct attribute_group w83781d_group_temp3 = {
 985        .attrs = w83781d_attributes_temp3,
 986};
 987
 988static struct attribute *w83781d_attributes_pwm12[] = {
 989        &sensor_dev_attr_pwm1.dev_attr.attr,
 990        &sensor_dev_attr_pwm2.dev_attr.attr,
 991        &dev_attr_pwm2_enable.attr,
 992        NULL
 993};
 994static const struct attribute_group w83781d_group_pwm12 = {
 995        .attrs = w83781d_attributes_pwm12,
 996};
 997
 998static struct attribute *w83781d_attributes_pwm34[] = {
 999        &sensor_dev_attr_pwm3.dev_attr.attr,
1000        &sensor_dev_attr_pwm4.dev_attr.attr,
1001        NULL
1002};
1003static const struct attribute_group w83781d_group_pwm34 = {
1004        .attrs = w83781d_attributes_pwm34,
1005};
1006
1007static struct attribute *w83781d_attributes_other[] = {
1008        &sensor_dev_attr_temp1_type.dev_attr.attr,
1009        &sensor_dev_attr_temp2_type.dev_attr.attr,
1010        &sensor_dev_attr_temp3_type.dev_attr.attr,
1011        NULL
1012};
1013static const struct attribute_group w83781d_group_other = {
1014        .attrs = w83781d_attributes_other,
1015};
1016
1017/* No clean up is done on error, it's up to the caller */
1018static int
1019w83781d_create_files(struct device *dev, int kind, int is_isa)
1020{
1021        int err;
1022
1023        err = sysfs_create_group(&dev->kobj, &w83781d_group);
1024        if (err)
1025                return err;
1026
1027        if (kind != w83783s) {
1028                err = sysfs_create_group(&dev->kobj, &w83781d_group_in1);
1029                if (err)
1030                        return err;
1031        }
1032        if (kind != as99127f && kind != w83781d && kind != w83783s) {
1033                err = sysfs_create_group(&dev->kobj, &w83781d_group_in78);
1034                if (err)
1035                        return err;
1036        }
1037        if (kind != w83783s) {
1038                err = sysfs_create_group(&dev->kobj, &w83781d_group_temp3);
1039                if (err)
1040                        return err;
1041
1042                if (kind != w83781d) {
1043                        err = sysfs_chmod_file(&dev->kobj,
1044                                &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1045                                S_IRUGO | S_IWUSR);
1046                        if (err)
1047                                return err;
1048                }
1049        }
1050
1051        if (kind != w83781d && kind != as99127f) {
1052                err = sysfs_create_group(&dev->kobj, &w83781d_group_pwm12);
1053                if (err)
1054                        return err;
1055        }
1056        if (kind == w83782d && !is_isa) {
1057                err = sysfs_create_group(&dev->kobj, &w83781d_group_pwm34);
1058                if (err)
1059                        return err;
1060        }
1061
1062        if (kind != as99127f && kind != w83781d) {
1063                err = device_create_file(dev,
1064                                         &sensor_dev_attr_temp1_type.dev_attr);
1065                if (err)
1066                        return err;
1067                err = device_create_file(dev,
1068                                         &sensor_dev_attr_temp2_type.dev_attr);
1069                if (err)
1070                        return err;
1071                if (kind != w83783s) {
1072                        err = device_create_file(dev,
1073                                        &sensor_dev_attr_temp3_type.dev_attr);
1074                        if (err)
1075                                return err;
1076                }
1077        }
1078
1079        return 0;
1080}
1081
1082/* Return 0 if detection is successful, -ENODEV otherwise */
1083static int
1084w83781d_detect(struct i2c_client *client, struct i2c_board_info *info)
1085{
1086        int val1, val2;
1087        struct w83781d_data *isa = w83781d_data_if_isa();
1088        struct i2c_adapter *adapter = client->adapter;
1089        int address = client->addr;
1090        const char *client_name;
1091        enum vendor { winbond, asus } vendid;
1092
1093        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1094                return -ENODEV;
1095
1096        /*
1097         * We block updates of the ISA device to minimize the risk of
1098         * concurrent access to the same W83781D chip through different
1099         * interfaces.
1100         */
1101        if (isa)
1102                mutex_lock(&isa->update_lock);
1103
1104        if (i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG) & 0x80) {
1105                dev_dbg(&adapter->dev,
1106                        "Detection of w83781d chip failed at step 3\n");
1107                goto err_nodev;
1108        }
1109
1110        val1 = i2c_smbus_read_byte_data(client, W83781D_REG_BANK);
1111        val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
1112        /* Check for Winbond or Asus ID if in bank 0 */
1113        if (!(val1 & 0x07) &&
1114            ((!(val1 & 0x80) && val2 != 0xa3 && val2 != 0xc3) ||
1115             ((val1 & 0x80) && val2 != 0x5c && val2 != 0x12))) {
1116                dev_dbg(&adapter->dev,
1117                        "Detection of w83781d chip failed at step 4\n");
1118                goto err_nodev;
1119        }
1120        /*
1121         * If Winbond SMBus, check address at 0x48.
1122         * Asus doesn't support, except for as99127f rev.2
1123         */
1124        if ((!(val1 & 0x80) && val2 == 0xa3) ||
1125            ((val1 & 0x80) && val2 == 0x5c)) {
1126                if (i2c_smbus_read_byte_data(client, W83781D_REG_I2C_ADDR)
1127                    != address) {
1128                        dev_dbg(&adapter->dev,
1129                                "Detection of w83781d chip failed at step 5\n");
1130                        goto err_nodev;
1131                }
1132        }
1133
1134        /* Put it now into bank 0 and Vendor ID High Byte */
1135        i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1136                (i2c_smbus_read_byte_data(client, W83781D_REG_BANK)
1137                 & 0x78) | 0x80);
1138
1139        /* Get the vendor ID */
1140        val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
1141        if (val2 == 0x5c)
1142                vendid = winbond;
1143        else if (val2 == 0x12)
1144                vendid = asus;
1145        else {
1146                dev_dbg(&adapter->dev,
1147                        "w83781d chip vendor is neither Winbond nor Asus\n");
1148                goto err_nodev;
1149        }
1150
1151        /* Determine the chip type. */
1152        val1 = i2c_smbus_read_byte_data(client, W83781D_REG_WCHIPID);
1153        if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond)
1154                client_name = "w83781d";
1155        else if (val1 == 0x30 && vendid == winbond)
1156                client_name = "w83782d";
1157        else if (val1 == 0x40 && vendid == winbond && address == 0x2d)
1158                client_name = "w83783s";
1159        else if (val1 == 0x31)
1160                client_name = "as99127f";
1161        else
1162                goto err_nodev;
1163
1164        if (val1 <= 0x30 && w83781d_alias_detect(client, val1)) {
1165                dev_dbg(&adapter->dev,
1166                        "Device at 0x%02x appears to be the same as ISA device\n",
1167                        address);
1168                goto err_nodev;
1169        }
1170
1171        if (isa)
1172                mutex_unlock(&isa->update_lock);
1173
1174        strlcpy(info->type, client_name, I2C_NAME_SIZE);
1175
1176        return 0;
1177
1178 err_nodev:
1179        if (isa)
1180                mutex_unlock(&isa->update_lock);
1181        return -ENODEV;
1182}
1183
1184static void w83781d_remove_files(struct device *dev)
1185{
1186        sysfs_remove_group(&dev->kobj, &w83781d_group);
1187        sysfs_remove_group(&dev->kobj, &w83781d_group_in1);
1188        sysfs_remove_group(&dev->kobj, &w83781d_group_in78);
1189        sysfs_remove_group(&dev->kobj, &w83781d_group_temp3);
1190        sysfs_remove_group(&dev->kobj, &w83781d_group_pwm12);
1191        sysfs_remove_group(&dev->kobj, &w83781d_group_pwm34);
1192        sysfs_remove_group(&dev->kobj, &w83781d_group_other);
1193}
1194
1195static int
1196w83781d_probe(struct i2c_client *client, const struct i2c_device_id *id)
1197{
1198        struct device *dev = &client->dev;
1199        struct w83781d_data *data;
1200        int err;
1201
1202        data = devm_kzalloc(dev, sizeof(struct w83781d_data), GFP_KERNEL);
1203        if (!data)
1204                return -ENOMEM;
1205
1206        i2c_set_clientdata(client, data);
1207        mutex_init(&data->lock);
1208        mutex_init(&data->update_lock);
1209
1210        data->type = id->driver_data;
1211        data->client = client;
1212
1213        /* attach secondary i2c lm75-like clients */
1214        err = w83781d_detect_subclients(client);
1215        if (err)
1216                return err;
1217
1218        /* Initialize the chip */
1219        w83781d_init_device(dev);
1220
1221        /* Register sysfs hooks */
1222        err = w83781d_create_files(dev, data->type, 0);
1223        if (err)
1224                goto exit_remove_files;
1225
1226        data->hwmon_dev = hwmon_device_register(dev);
1227        if (IS_ERR(data->hwmon_dev)) {
1228                err = PTR_ERR(data->hwmon_dev);
1229                goto exit_remove_files;
1230        }
1231
1232        return 0;
1233
1234 exit_remove_files:
1235        w83781d_remove_files(dev);
1236        i2c_unregister_device(data->lm75[0]);
1237        i2c_unregister_device(data->lm75[1]);
1238        return err;
1239}
1240
1241static int
1242w83781d_remove(struct i2c_client *client)
1243{
1244        struct w83781d_data *data = i2c_get_clientdata(client);
1245        struct device *dev = &client->dev;
1246
1247        hwmon_device_unregister(data->hwmon_dev);
1248        w83781d_remove_files(dev);
1249
1250        i2c_unregister_device(data->lm75[0]);
1251        i2c_unregister_device(data->lm75[1]);
1252
1253        return 0;
1254}
1255
1256static int
1257w83781d_read_value_i2c(struct w83781d_data *data, u16 reg)
1258{
1259        struct i2c_client *client = data->client;
1260        int res, bank;
1261        struct i2c_client *cl;
1262
1263        bank = (reg >> 8) & 0x0f;
1264        if (bank > 2)
1265                /* switch banks */
1266                i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1267                                          bank);
1268        if (bank == 0 || bank > 2) {
1269                res = i2c_smbus_read_byte_data(client, reg & 0xff);
1270        } else {
1271                /* switch to subclient */
1272                cl = data->lm75[bank - 1];
1273                /* convert from ISA to LM75 I2C addresses */
1274                switch (reg & 0xff) {
1275                case 0x50:      /* TEMP */
1276                        res = i2c_smbus_read_word_swapped(cl, 0);
1277                        break;
1278                case 0x52:      /* CONFIG */
1279                        res = i2c_smbus_read_byte_data(cl, 1);
1280                        break;
1281                case 0x53:      /* HYST */
1282                        res = i2c_smbus_read_word_swapped(cl, 2);
1283                        break;
1284                case 0x55:      /* OVER */
1285                default:
1286                        res = i2c_smbus_read_word_swapped(cl, 3);
1287                        break;
1288                }
1289        }
1290        if (bank > 2)
1291                i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1292
1293        return res;
1294}
1295
1296static int
1297w83781d_write_value_i2c(struct w83781d_data *data, u16 reg, u16 value)
1298{
1299        struct i2c_client *client = data->client;
1300        int bank;
1301        struct i2c_client *cl;
1302
1303        bank = (reg >> 8) & 0x0f;
1304        if (bank > 2)
1305                /* switch banks */
1306                i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1307                                          bank);
1308        if (bank == 0 || bank > 2) {
1309                i2c_smbus_write_byte_data(client, reg & 0xff,
1310                                          value & 0xff);
1311        } else {
1312                /* switch to subclient */
1313                cl = data->lm75[bank - 1];
1314                /* convert from ISA to LM75 I2C addresses */
1315                switch (reg & 0xff) {
1316                case 0x52:      /* CONFIG */
1317                        i2c_smbus_write_byte_data(cl, 1, value & 0xff);
1318                        break;
1319                case 0x53:      /* HYST */
1320                        i2c_smbus_write_word_swapped(cl, 2, value);
1321                        break;
1322                case 0x55:      /* OVER */
1323                        i2c_smbus_write_word_swapped(cl, 3, value);
1324                        break;
1325                }
1326        }
1327        if (bank > 2)
1328                i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1329
1330        return 0;
1331}
1332
1333static void
1334w83781d_init_device(struct device *dev)
1335{
1336        struct w83781d_data *data = dev_get_drvdata(dev);
1337        int i, p;
1338        int type = data->type;
1339        u8 tmp;
1340
1341        if (reset && type != as99127f) { /*
1342                                          * this resets registers we don't have
1343                                          * documentation for on the as99127f
1344                                          */
1345                /*
1346                 * Resetting the chip has been the default for a long time,
1347                 * but it causes the BIOS initializations (fan clock dividers,
1348                 * thermal sensor types...) to be lost, so it is now optional.
1349                 * It might even go away if nobody reports it as being useful,
1350                 * as I see very little reason why this would be needed at
1351                 * all.
1352                 */
1353                dev_info(dev,
1354                         "If reset=1 solved a problem you were having, please report!\n");
1355
1356                /* save these registers */
1357                i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
1358                p = w83781d_read_value(data, W83781D_REG_PWMCLK12);
1359                /*
1360                 * Reset all except Watchdog values and last conversion values
1361                 * This sets fan-divs to 2, among others
1362                 */
1363                w83781d_write_value(data, W83781D_REG_CONFIG, 0x80);
1364                /*
1365                 * Restore the registers and disable power-on abnormal beep.
1366                 * This saves FAN 1/2/3 input/output values set by BIOS.
1367                 */
1368                w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
1369                w83781d_write_value(data, W83781D_REG_PWMCLK12, p);
1370                /*
1371                 * Disable master beep-enable (reset turns it on).
1372                 * Individual beep_mask should be reset to off but for some
1373                 * reason disabling this bit helps some people not get beeped
1374                 */
1375                w83781d_write_value(data, W83781D_REG_BEEP_INTS2, 0);
1376        }
1377
1378        /*
1379         * Disable power-on abnormal beep, as advised by the datasheet.
1380         * Already done if reset=1.
1381         */
1382        if (init && !reset && type != as99127f) {
1383                i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
1384                w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
1385        }
1386
1387        data->vrm = vid_which_vrm();
1388
1389        if ((type != w83781d) && (type != as99127f)) {
1390                tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
1391                for (i = 1; i <= 3; i++) {
1392                        if (!(tmp & BIT_SCFG1[i - 1])) {
1393                                data->sens[i - 1] = 4;
1394                        } else {
1395                                if (w83781d_read_value
1396                                    (data,
1397                                     W83781D_REG_SCFG2) & BIT_SCFG2[i - 1])
1398                                        data->sens[i - 1] = 1;
1399                                else
1400                                        data->sens[i - 1] = 2;
1401                        }
1402                        if (type == w83783s && i == 2)
1403                                break;
1404                }
1405        }
1406
1407        if (init && type != as99127f) {
1408                /* Enable temp2 */
1409                tmp = w83781d_read_value(data, W83781D_REG_TEMP2_CONFIG);
1410                if (tmp & 0x01) {
1411                        dev_warn(dev,
1412                                 "Enabling temp2, readings might not make sense\n");
1413                        w83781d_write_value(data, W83781D_REG_TEMP2_CONFIG,
1414                                tmp & 0xfe);
1415                }
1416
1417                /* Enable temp3 */
1418                if (type != w83783s) {
1419                        tmp = w83781d_read_value(data,
1420                                W83781D_REG_TEMP3_CONFIG);
1421                        if (tmp & 0x01) {
1422                                dev_warn(dev,
1423                                         "Enabling temp3, readings might not make sense\n");
1424                                w83781d_write_value(data,
1425                                        W83781D_REG_TEMP3_CONFIG, tmp & 0xfe);
1426                        }
1427                }
1428        }
1429
1430        /* Start monitoring */
1431        w83781d_write_value(data, W83781D_REG_CONFIG,
1432                            (w83781d_read_value(data,
1433                                                W83781D_REG_CONFIG) & 0xf7)
1434                            | 0x01);
1435
1436        /* A few vars need to be filled upon startup */
1437        for (i = 0; i < 3; i++) {
1438                data->fan_min[i] = w83781d_read_value(data,
1439                                        W83781D_REG_FAN_MIN(i));
1440        }
1441
1442        mutex_init(&data->update_lock);
1443}
1444
1445static struct w83781d_data *w83781d_update_device(struct device *dev)
1446{
1447        struct w83781d_data *data = dev_get_drvdata(dev);
1448        struct i2c_client *client = data->client;
1449        int i;
1450
1451        mutex_lock(&data->update_lock);
1452
1453        if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1454            || !data->valid) {
1455                dev_dbg(dev, "Starting device update\n");
1456
1457                for (i = 0; i <= 8; i++) {
1458                        if (data->type == w83783s && i == 1)
1459                                continue;       /* 783S has no in1 */
1460                        data->in[i] =
1461                            w83781d_read_value(data, W83781D_REG_IN(i));
1462                        data->in_min[i] =
1463                            w83781d_read_value(data, W83781D_REG_IN_MIN(i));
1464                        data->in_max[i] =
1465                            w83781d_read_value(data, W83781D_REG_IN_MAX(i));
1466                        if ((data->type != w83782d) && (i == 6))
1467                                break;
1468                }
1469                for (i = 0; i < 3; i++) {
1470                        data->fan[i] =
1471                            w83781d_read_value(data, W83781D_REG_FAN(i));
1472                        data->fan_min[i] =
1473                            w83781d_read_value(data, W83781D_REG_FAN_MIN(i));
1474                }
1475                if (data->type != w83781d && data->type != as99127f) {
1476                        for (i = 0; i < 4; i++) {
1477                                data->pwm[i] =
1478                                    w83781d_read_value(data,
1479                                                       W83781D_REG_PWM[i]);
1480                                /* Only W83782D on SMBus has PWM3 and PWM4 */
1481                                if ((data->type != w83782d || !client)
1482                                    && i == 1)
1483                                        break;
1484                        }
1485                        /* Only PWM2 can be disabled */
1486                        data->pwm2_enable = (w83781d_read_value(data,
1487                                             W83781D_REG_PWMCLK12) & 0x08) >> 3;
1488                }
1489
1490                data->temp = w83781d_read_value(data, W83781D_REG_TEMP(1));
1491                data->temp_max =
1492                    w83781d_read_value(data, W83781D_REG_TEMP_OVER(1));
1493                data->temp_max_hyst =
1494                    w83781d_read_value(data, W83781D_REG_TEMP_HYST(1));
1495                data->temp_add[0] =
1496                    w83781d_read_value(data, W83781D_REG_TEMP(2));
1497                data->temp_max_add[0] =
1498                    w83781d_read_value(data, W83781D_REG_TEMP_OVER(2));
1499                data->temp_max_hyst_add[0] =
1500                    w83781d_read_value(data, W83781D_REG_TEMP_HYST(2));
1501                if (data->type != w83783s) {
1502                        data->temp_add[1] =
1503                            w83781d_read_value(data, W83781D_REG_TEMP(3));
1504                        data->temp_max_add[1] =
1505                            w83781d_read_value(data,
1506                                               W83781D_REG_TEMP_OVER(3));
1507                        data->temp_max_hyst_add[1] =
1508                            w83781d_read_value(data,
1509                                               W83781D_REG_TEMP_HYST(3));
1510                }
1511                i = w83781d_read_value(data, W83781D_REG_VID_FANDIV);
1512                data->vid = i & 0x0f;
1513                data->vid |= (w83781d_read_value(data,
1514                                        W83781D_REG_CHIPID) & 0x01) << 4;
1515                data->fan_div[0] = (i >> 4) & 0x03;
1516                data->fan_div[1] = (i >> 6) & 0x03;
1517                data->fan_div[2] = (w83781d_read_value(data,
1518                                        W83781D_REG_PIN) >> 6) & 0x03;
1519                if ((data->type != w83781d) && (data->type != as99127f)) {
1520                        i = w83781d_read_value(data, W83781D_REG_VBAT);
1521                        data->fan_div[0] |= (i >> 3) & 0x04;
1522                        data->fan_div[1] |= (i >> 4) & 0x04;
1523                        data->fan_div[2] |= (i >> 5) & 0x04;
1524                }
1525                if (data->type == w83782d) {
1526                        data->alarms = w83781d_read_value(data,
1527                                                W83782D_REG_ALARM1)
1528                                     | (w83781d_read_value(data,
1529                                                W83782D_REG_ALARM2) << 8)
1530                                     | (w83781d_read_value(data,
1531                                                W83782D_REG_ALARM3) << 16);
1532                } else if (data->type == w83783s) {
1533                        data->alarms = w83781d_read_value(data,
1534                                                W83782D_REG_ALARM1)
1535                                     | (w83781d_read_value(data,
1536                                                W83782D_REG_ALARM2) << 8);
1537                } else {
1538                        /*
1539                         * No real-time status registers, fall back to
1540                         * interrupt status registers
1541                         */
1542                        data->alarms = w83781d_read_value(data,
1543                                                W83781D_REG_ALARM1)
1544                                     | (w83781d_read_value(data,
1545                                                W83781D_REG_ALARM2) << 8);
1546                }
1547                i = w83781d_read_value(data, W83781D_REG_BEEP_INTS2);
1548                data->beep_mask = (i << 8) +
1549                    w83781d_read_value(data, W83781D_REG_BEEP_INTS1);
1550                if ((data->type != w83781d) && (data->type != as99127f)) {
1551                        data->beep_mask |=
1552                            w83781d_read_value(data,
1553                                               W83781D_REG_BEEP_INTS3) << 16;
1554                }
1555                data->last_updated = jiffies;
1556                data->valid = 1;
1557        }
1558
1559        mutex_unlock(&data->update_lock);
1560
1561        return data;
1562}
1563
1564static const struct i2c_device_id w83781d_ids[] = {
1565        { "w83781d", w83781d, },
1566        { "w83782d", w83782d, },
1567        { "w83783s", w83783s, },
1568        { "as99127f", as99127f },
1569        { /* LIST END */ }
1570};
1571MODULE_DEVICE_TABLE(i2c, w83781d_ids);
1572
1573static struct i2c_driver w83781d_driver = {
1574        .class          = I2C_CLASS_HWMON,
1575        .driver = {
1576                .name = "w83781d",
1577        },
1578        .probe          = w83781d_probe,
1579        .remove         = w83781d_remove,
1580        .id_table       = w83781d_ids,
1581        .detect         = w83781d_detect,
1582        .address_list   = normal_i2c,
1583};
1584
1585/*
1586 * ISA related code
1587 */
1588#ifdef CONFIG_ISA
1589
1590/* ISA device, if found */
1591static struct platform_device *pdev;
1592
1593static unsigned short isa_address = 0x290;
1594
1595/*
1596 * I2C devices get this name attribute automatically, but for ISA devices
1597 * we must create it by ourselves.
1598 */
1599static ssize_t
1600name_show(struct device *dev, struct device_attribute *devattr, char *buf)
1601{
1602        struct w83781d_data *data = dev_get_drvdata(dev);
1603        return sprintf(buf, "%s\n", data->name);
1604}
1605static DEVICE_ATTR_RO(name);
1606
1607static struct w83781d_data *w83781d_data_if_isa(void)
1608{
1609        return pdev ? platform_get_drvdata(pdev) : NULL;
1610}
1611
1612/* Returns 1 if the I2C chip appears to be an alias of the ISA chip */
1613static int w83781d_alias_detect(struct i2c_client *client, u8 chipid)
1614{
1615        struct w83781d_data *isa;
1616        int i;
1617
1618        if (!pdev)      /* No ISA chip */
1619                return 0;
1620
1621        isa = platform_get_drvdata(pdev);
1622
1623        if (w83781d_read_value(isa, W83781D_REG_I2C_ADDR) != client->addr)
1624                return 0;       /* Address doesn't match */
1625        if (w83781d_read_value(isa, W83781D_REG_WCHIPID) != chipid)
1626                return 0;       /* Chip type doesn't match */
1627
1628        /*
1629         * We compare all the limit registers, the config register and the
1630         * interrupt mask registers
1631         */
1632        for (i = 0x2b; i <= 0x3d; i++) {
1633                if (w83781d_read_value(isa, i) !=
1634                    i2c_smbus_read_byte_data(client, i))
1635                        return 0;
1636        }
1637        if (w83781d_read_value(isa, W83781D_REG_CONFIG) !=
1638            i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG))
1639                return 0;
1640        for (i = 0x43; i <= 0x46; i++) {
1641                if (w83781d_read_value(isa, i) !=
1642                    i2c_smbus_read_byte_data(client, i))
1643                        return 0;
1644        }
1645
1646        return 1;
1647}
1648
1649static int
1650w83781d_read_value_isa(struct w83781d_data *data, u16 reg)
1651{
1652        int word_sized, res;
1653
1654        word_sized = (((reg & 0xff00) == 0x100)
1655                      || ((reg & 0xff00) == 0x200))
1656            && (((reg & 0x00ff) == 0x50)
1657                || ((reg & 0x00ff) == 0x53)
1658                || ((reg & 0x00ff) == 0x55));
1659        if (reg & 0xff00) {
1660                outb_p(W83781D_REG_BANK,
1661                       data->isa_addr + W83781D_ADDR_REG_OFFSET);
1662                outb_p(reg >> 8,
1663                       data->isa_addr + W83781D_DATA_REG_OFFSET);
1664        }
1665        outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
1666        res = inb_p(data->isa_addr + W83781D_DATA_REG_OFFSET);
1667        if (word_sized) {
1668                outb_p((reg & 0xff) + 1,
1669                       data->isa_addr + W83781D_ADDR_REG_OFFSET);
1670                res =
1671                    (res << 8) + inb_p(data->isa_addr +
1672                                       W83781D_DATA_REG_OFFSET);
1673        }
1674        if (reg & 0xff00) {
1675                outb_p(W83781D_REG_BANK,
1676                       data->isa_addr + W83781D_ADDR_REG_OFFSET);
1677                outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
1678        }
1679        return res;
1680}
1681
1682static void
1683w83781d_write_value_isa(struct w83781d_data *data, u16 reg, u16 value)
1684{
1685        int word_sized;
1686
1687        word_sized = (((reg & 0xff00) == 0x100)
1688                      || ((reg & 0xff00) == 0x200))
1689            && (((reg & 0x00ff) == 0x53)
1690                || ((reg & 0x00ff) == 0x55));
1691        if (reg & 0xff00) {
1692                outb_p(W83781D_REG_BANK,
1693                       data->isa_addr + W83781D_ADDR_REG_OFFSET);
1694                outb_p(reg >> 8,
1695                       data->isa_addr + W83781D_DATA_REG_OFFSET);
1696        }
1697        outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
1698        if (word_sized) {
1699                outb_p(value >> 8,
1700                       data->isa_addr + W83781D_DATA_REG_OFFSET);
1701                outb_p((reg & 0xff) + 1,
1702                       data->isa_addr + W83781D_ADDR_REG_OFFSET);
1703        }
1704        outb_p(value & 0xff, data->isa_addr + W83781D_DATA_REG_OFFSET);
1705        if (reg & 0xff00) {
1706                outb_p(W83781D_REG_BANK,
1707                       data->isa_addr + W83781D_ADDR_REG_OFFSET);
1708                outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
1709        }
1710}
1711
1712/*
1713 * The SMBus locks itself, usually, but nothing may access the Winbond between
1714 * bank switches. ISA access must always be locked explicitly!
1715 * We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks,
1716 * would slow down the W83781D access and should not be necessary.
1717 * There are some ugly typecasts here, but the good news is - they should
1718 * nowhere else be necessary!
1719 */
1720static int
1721w83781d_read_value(struct w83781d_data *data, u16 reg)
1722{
1723        struct i2c_client *client = data->client;
1724        int res;
1725
1726        mutex_lock(&data->lock);
1727        if (client)
1728                res = w83781d_read_value_i2c(data, reg);
1729        else
1730                res = w83781d_read_value_isa(data, reg);
1731        mutex_unlock(&data->lock);
1732        return res;
1733}
1734
1735static int
1736w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
1737{
1738        struct i2c_client *client = data->client;
1739
1740        mutex_lock(&data->lock);
1741        if (client)
1742                w83781d_write_value_i2c(data, reg, value);
1743        else
1744                w83781d_write_value_isa(data, reg, value);
1745        mutex_unlock(&data->lock);
1746        return 0;
1747}
1748
1749static int
1750w83781d_isa_probe(struct platform_device *pdev)
1751{
1752        int err, reg;
1753        struct w83781d_data *data;
1754        struct resource *res;
1755
1756        /* Reserve the ISA region */
1757        res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1758        if (!devm_request_region(&pdev->dev,
1759                                 res->start + W83781D_ADDR_REG_OFFSET, 2,
1760                                 "w83781d"))
1761                return -EBUSY;
1762
1763        data = devm_kzalloc(&pdev->dev, sizeof(struct w83781d_data),
1764                            GFP_KERNEL);
1765        if (!data)
1766                return -ENOMEM;
1767
1768        mutex_init(&data->lock);
1769        data->isa_addr = res->start;
1770        platform_set_drvdata(pdev, data);
1771
1772        reg = w83781d_read_value(data, W83781D_REG_WCHIPID);
1773        switch (reg) {
1774        case 0x30:
1775                data->type = w83782d;
1776                data->name = "w83782d";
1777                break;
1778        default:
1779                data->type = w83781d;
1780                data->name = "w83781d";
1781        }
1782
1783        /* Initialize the W83781D chip */
1784        w83781d_init_device(&pdev->dev);
1785
1786        /* Register sysfs hooks */
1787        err = w83781d_create_files(&pdev->dev, data->type, 1);
1788        if (err)
1789                goto exit_remove_files;
1790
1791        err = device_create_file(&pdev->dev, &dev_attr_name);
1792        if (err)
1793                goto exit_remove_files;
1794
1795        data->hwmon_dev = hwmon_device_register(&pdev->dev);
1796        if (IS_ERR(data->hwmon_dev)) {
1797                err = PTR_ERR(data->hwmon_dev);
1798                goto exit_remove_files;
1799        }
1800
1801        return 0;
1802
1803 exit_remove_files:
1804        w83781d_remove_files(&pdev->dev);
1805        device_remove_file(&pdev->dev, &dev_attr_name);
1806        return err;
1807}
1808
1809static int
1810w83781d_isa_remove(struct platform_device *pdev)
1811{
1812        struct w83781d_data *data = platform_get_drvdata(pdev);
1813
1814        hwmon_device_unregister(data->hwmon_dev);
1815        w83781d_remove_files(&pdev->dev);
1816        device_remove_file(&pdev->dev, &dev_attr_name);
1817
1818        return 0;
1819}
1820
1821static struct platform_driver w83781d_isa_driver = {
1822        .driver = {
1823                .name = "w83781d",
1824        },
1825        .probe = w83781d_isa_probe,
1826        .remove = w83781d_isa_remove,
1827};
1828
1829/* return 1 if a supported chip is found, 0 otherwise */
1830static int __init
1831w83781d_isa_found(unsigned short address)
1832{
1833        int val, save, found = 0;
1834        int port;
1835
1836        /*
1837         * Some boards declare base+0 to base+7 as a PNP device, some base+4
1838         * to base+7 and some base+5 to base+6. So we better request each port
1839         * individually for the probing phase.
1840         */
1841        for (port = address; port < address + W83781D_EXTENT; port++) {
1842                if (!request_region(port, 1, "w83781d")) {
1843                        pr_debug("Failed to request port 0x%x\n", port);
1844                        goto release;
1845                }
1846        }
1847
1848#define REALLY_SLOW_IO
1849        /*
1850         * We need the timeouts for at least some W83781D-like
1851         * chips. But only if we read 'undefined' registers.
1852         */
1853        val = inb_p(address + 1);
1854        if (inb_p(address + 2) != val
1855         || inb_p(address + 3) != val
1856         || inb_p(address + 7) != val) {
1857                pr_debug("Detection failed at step %d\n", 1);
1858                goto release;
1859        }
1860#undef REALLY_SLOW_IO
1861
1862        /*
1863         * We should be able to change the 7 LSB of the address port. The
1864         * MSB (busy flag) should be clear initially, set after the write.
1865         */
1866        save = inb_p(address + W83781D_ADDR_REG_OFFSET);
1867        if (save & 0x80) {
1868                pr_debug("Detection failed at step %d\n", 2);
1869                goto release;
1870        }
1871        val = ~save & 0x7f;
1872        outb_p(val, address + W83781D_ADDR_REG_OFFSET);
1873        if (inb_p(address + W83781D_ADDR_REG_OFFSET) != (val | 0x80)) {
1874                outb_p(save, address + W83781D_ADDR_REG_OFFSET);
1875                pr_debug("Detection failed at step %d\n", 3);
1876                goto release;
1877        }
1878
1879        /* We found a device, now see if it could be a W83781D */
1880        outb_p(W83781D_REG_CONFIG, address + W83781D_ADDR_REG_OFFSET);
1881        val = inb_p(address + W83781D_DATA_REG_OFFSET);
1882        if (val & 0x80) {
1883                pr_debug("Detection failed at step %d\n", 4);
1884                goto release;
1885        }
1886        outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET);
1887        save = inb_p(address + W83781D_DATA_REG_OFFSET);
1888        outb_p(W83781D_REG_CHIPMAN, address + W83781D_ADDR_REG_OFFSET);
1889        val = inb_p(address + W83781D_DATA_REG_OFFSET);
1890        if ((!(save & 0x80) && (val != 0xa3))
1891         || ((save & 0x80) && (val != 0x5c))) {
1892                pr_debug("Detection failed at step %d\n", 5);
1893                goto release;
1894        }
1895        outb_p(W83781D_REG_I2C_ADDR, address + W83781D_ADDR_REG_OFFSET);
1896        val = inb_p(address + W83781D_DATA_REG_OFFSET);
1897        if (val < 0x03 || val > 0x77) { /* Not a valid I2C address */
1898                pr_debug("Detection failed at step %d\n", 6);
1899                goto release;
1900        }
1901
1902        /* The busy flag should be clear again */
1903        if (inb_p(address + W83781D_ADDR_REG_OFFSET) & 0x80) {
1904                pr_debug("Detection failed at step %d\n", 7);
1905                goto release;
1906        }
1907
1908        /* Determine the chip type */
1909        outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET);
1910        save = inb_p(address + W83781D_DATA_REG_OFFSET);
1911        outb_p(save & 0xf8, address + W83781D_DATA_REG_OFFSET);
1912        outb_p(W83781D_REG_WCHIPID, address + W83781D_ADDR_REG_OFFSET);
1913        val = inb_p(address + W83781D_DATA_REG_OFFSET);
1914        if ((val & 0xfe) == 0x10        /* W83781D */
1915         || val == 0x30)                /* W83782D */
1916                found = 1;
1917
1918        if (found)
1919                pr_info("Found a %s chip at %#x\n",
1920                        val == 0x30 ? "W83782D" : "W83781D", (int)address);
1921
1922 release:
1923        for (port--; port >= address; port--)
1924                release_region(port, 1);
1925        return found;
1926}
1927
1928static int __init
1929w83781d_isa_device_add(unsigned short address)
1930{
1931        struct resource res = {
1932                .start  = address,
1933                .end    = address + W83781D_EXTENT - 1,
1934                .name   = "w83781d",
1935                .flags  = IORESOURCE_IO,
1936        };
1937        int err;
1938
1939        pdev = platform_device_alloc("w83781d", address);
1940        if (!pdev) {
1941                err = -ENOMEM;
1942                pr_err("Device allocation failed\n");
1943                goto exit;
1944        }
1945
1946        err = platform_device_add_resources(pdev, &res, 1);
1947        if (err) {
1948                pr_err("Device resource addition failed (%d)\n", err);
1949                goto exit_device_put;
1950        }
1951
1952        err = platform_device_add(pdev);
1953        if (err) {
1954                pr_err("Device addition failed (%d)\n", err);
1955                goto exit_device_put;
1956        }
1957
1958        return 0;
1959
1960 exit_device_put:
1961        platform_device_put(pdev);
1962 exit:
1963        pdev = NULL;
1964        return err;
1965}
1966
1967static int __init
1968w83781d_isa_register(void)
1969{
1970        int res;
1971
1972        if (w83781d_isa_found(isa_address)) {
1973                res = platform_driver_register(&w83781d_isa_driver);
1974                if (res)
1975                        goto exit;
1976
1977                /* Sets global pdev as a side effect */
1978                res = w83781d_isa_device_add(isa_address);
1979                if (res)
1980                        goto exit_unreg_isa_driver;
1981        }
1982
1983        return 0;
1984
1985exit_unreg_isa_driver:
1986        platform_driver_unregister(&w83781d_isa_driver);
1987exit:
1988        return res;
1989}
1990
1991static void
1992w83781d_isa_unregister(void)
1993{
1994        if (pdev) {
1995                platform_device_unregister(pdev);
1996                platform_driver_unregister(&w83781d_isa_driver);
1997        }
1998}
1999#else /* !CONFIG_ISA */
2000
2001static struct w83781d_data *w83781d_data_if_isa(void)
2002{
2003        return NULL;
2004}
2005
2006static int
2007w83781d_alias_detect(struct i2c_client *client, u8 chipid)
2008{
2009        return 0;
2010}
2011
2012static int
2013w83781d_read_value(struct w83781d_data *data, u16 reg)
2014{
2015        int res;
2016
2017        mutex_lock(&data->lock);
2018        res = w83781d_read_value_i2c(data, reg);
2019        mutex_unlock(&data->lock);
2020
2021        return res;
2022}
2023
2024static int
2025w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
2026{
2027        mutex_lock(&data->lock);
2028        w83781d_write_value_i2c(data, reg, value);
2029        mutex_unlock(&data->lock);
2030
2031        return 0;
2032}
2033
2034static int __init
2035w83781d_isa_register(void)
2036{
2037        return 0;
2038}
2039
2040static void
2041w83781d_isa_unregister(void)
2042{
2043}
2044#endif /* CONFIG_ISA */
2045
2046static int __init
2047sensors_w83781d_init(void)
2048{
2049        int res;
2050
2051        /*
2052         * We register the ISA device first, so that we can skip the
2053         * registration of an I2C interface to the same device.
2054         */
2055        res = w83781d_isa_register();
2056        if (res)
2057                goto exit;
2058
2059        res = i2c_add_driver(&w83781d_driver);
2060        if (res)
2061                goto exit_unreg_isa;
2062
2063        return 0;
2064
2065 exit_unreg_isa:
2066        w83781d_isa_unregister();
2067 exit:
2068        return res;
2069}
2070
2071static void __exit
2072sensors_w83781d_exit(void)
2073{
2074        w83781d_isa_unregister();
2075        i2c_del_driver(&w83781d_driver);
2076}
2077
2078MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
2079              "Philip Edelbrock <phil@netroedge.com>, "
2080              "and Mark Studebaker <mdsxyz123@yahoo.com>");
2081MODULE_DESCRIPTION("W83781D driver");
2082MODULE_LICENSE("GPL");
2083
2084module_init(sensors_w83781d_init);
2085module_exit(sensors_w83781d_exit);
2086