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   1 /*
   2     w83627ehf - Driver for the hardware monitoring functionality of
   3                 the Winbond W83627EHF Super-I/O chip
   4     Copyright (C) 2005  Jean Delvare <khali@linux-fr.org>
   5
   6     Shamelessly ripped from the w83627hf driver
   7     Copyright (C) 2003  Mark Studebaker
   8
   9     Thanks to Leon Moonen, Steve Cliffe and Grant Coady for their help
  10     in testing and debugging this driver.
  11
  12     This program is free software; you can redistribute it and/or modify
  13     it under the terms of the GNU General Public License as published by
  14     the Free Software Foundation; either version 2 of the License, or
  15     (at your option) any later version.
  16
  17     This program is distributed in the hope that it will be useful,
  18     but WITHOUT ANY WARRANTY; without even the implied warranty of
  19     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20     GNU General Public License for more details.
  21
  22     You should have received a copy of the GNU General Public License
  23     along with this program; if not, write to the Free Software
  24     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25
  26
  27     Supports the following chips:
  28
  29     Chip        #vin    #fan    #pwm    #temp   chip_id man_id
  30     w83627ehf   -       5       -       3       0x88    0x5ca3
  31
  32     This is a preliminary version of the driver, only supporting the
  33     fan and temperature inputs. The chip does much more than that.
  34 */
  35
  36 #include <linux/module.h>
  37 #include <linux/init.h>
  38 #include <linux/slab.h>
  39 #include <linux/i2c.h>
  40 #include <linux/i2c-sensor.h>
  41 #include <asm/io.h>
  42 #include "lm75.h"
  43
  44 /* Addresses to scan
  45    The actual ISA address is read from Super-I/O configuration space */
  46 static unsigned short normal_i2c[] = { I2C_CLIENT_END };
  47 static unsigned int normal_isa[] = { 0, I2C_CLIENT_ISA_END };
  48
  49 /* Insmod parameters */
  50 SENSORS_INSMOD_1(w83627ehf);
  51
  52 /*
  53  * Super-I/O constants and functions
  54  */
  55
  56 static int REG;         /* The register to read/write */
  57 static int VAL;         /* The value to read/write */
  58
  59 #define W83627EHF_LD_HWM        0x0b
  60
  61 #define SIO_REG_LDSEL           0x07    /* Logical device select */
  62 #define SIO_REG_DEVID           0x20    /* Device ID (2 bytes) */
  63 #define SIO_REG_ENABLE          0x30    /* Logical device enable */
  64 #define SIO_REG_ADDR            0x60    /* Logical device address (2 bytes) */
  65
  66 #define SIO_W83627EHF_ID        0x8840
  67 #define SIO_ID_MASK             0xFFC0
  68
  69 static inline void
  70 superio_outb(int reg, int val)
  71 {
  72         outb(reg, REG);
  73         outb(val, VAL);
  74 }
  75
  76 static inline int
  77 superio_inb(int reg)
  78 {
  79         outb(reg, REG);
  80         return inb(VAL);
  81 }
  82
  83 static inline void
  84 superio_select(int ld)
  85 {
  86         outb(SIO_REG_LDSEL, REG);
  87         outb(ld, VAL);
  88 }
  89
  90 static inline void
  91 superio_enter(void)
  92 {
  93         outb(0x87, REG);
  94         outb(0x87, REG);
  95 }
  96
  97 static inline void
  98 superio_exit(void)
  99 {
 100         outb(0x02, REG);
 101         outb(0x02, VAL);
 102 }
 103
 104 /*
 105  * ISA constants
 106  */
 107
 108 #define REGION_LENGTH           8
 109 #define ADDR_REG_OFFSET         5
 110 #define DATA_REG_OFFSET         6
 111
 112 #define W83627EHF_REG_BANK              0x4E
 113 #define W83627EHF_REG_CONFIG            0x40
 114 #define W83627EHF_REG_CHIP_ID           0x49
 115 #define W83627EHF_REG_MAN_ID            0x4F
 116
 117 static const u16 W83627EHF_REG_FAN[] = { 0x28, 0x29, 0x2a, 0x3f, 0x553 };
 118 static const u16 W83627EHF_REG_FAN_MIN[] = { 0x3b, 0x3c, 0x3d, 0x3e, 0x55c };
 119
 120 #define W83627EHF_REG_TEMP1             0x27
 121 #define W83627EHF_REG_TEMP1_HYST        0x3a
 122 #define W83627EHF_REG_TEMP1_OVER        0x39
 123 static const u16 W83627EHF_REG_TEMP[] = { 0x150, 0x250 };
 124 static const u16 W83627EHF_REG_TEMP_HYST[] = { 0x153, 0x253 };
 125 static const u16 W83627EHF_REG_TEMP_OVER[] = { 0x155, 0x255 };
 126 static const u16 W83627EHF_REG_TEMP_CONFIG[] = { 0x152, 0x252 };
 127
 128 /* Fan clock dividers are spread over the following five registers */
 129 #define W83627EHF_REG_FANDIV1           0x47
 130 #define W83627EHF_REG_FANDIV2           0x4B
 131 #define W83627EHF_REG_VBAT              0x5D
 132 #define W83627EHF_REG_DIODE             0x59
 133 #define W83627EHF_REG_SMI_OVT           0x4C
 134
 135 /*
 136  * Conversions
 137  */
 138
 139 static inline unsigned int
 140 fan_from_reg(u8 reg, unsigned int div)
 141 {
 142         if (reg == 0 || reg == 255)
 143                 return 0;
 144         return 1350000U / (reg * div);
 145 }
 146
 147 static inline unsigned int
 148 div_from_reg(u8 reg)
 149 {
 150         return 1 << reg;
 151 }
 152
 153 static inline int
 154 temp1_from_reg(s8 reg)
 155 {
 156         return reg * 1000;
 157 }
 158
 159 static inline s8
 160 temp1_to_reg(int temp)
 161 {
 162         if (temp <= -128000)
 163                 return -128;
 164         if (temp >= 127000)
 165                 return 127;
 166         if (temp < 0)
 167                 return (temp - 500) / 1000;
 168         return (temp + 500) / 1000;
 169 }
 170
 171 /*
 172  * Data structures and manipulation thereof
 173  */
 174
 175 struct w83627ehf_data {
 176         struct i2c_client client;
 177         struct semaphore lock;
 178
 179         struct semaphore update_lock;
 180         char valid;             /* !=0 if following fields are valid */
 181         unsigned long last_updated;     /* In jiffies */
 182
 183         /* Register values */
 184         u8 fan[5];
 185         u8 fan_min[5];
 186         u8 fan_div[5];
 187         u8 has_fan;             /* some fan inputs can be disabled */
 188         s8 temp1;
 189         s8 temp1_max;
 190         s8 temp1_max_hyst;
 191         s16 temp[2];
 192         s16 temp_max[2];
 193         s16 temp_max_hyst[2];
 194 };
 195
 196 static inline int is_word_sized(u16 reg)
 197 {
 198         return (((reg & 0xff00) == 0x100
 199               || (reg & 0xff00) == 0x200)
 200              && ((reg & 0x00ff) == 0x50
 201               || (reg & 0x00ff) == 0x53
 202               || (reg & 0x00ff) == 0x55));
 203 }
 204
 205 /* We assume that the default bank is 0, thus the following two functions do
 206    nothing for registers which live in bank 0. For others, they respectively
 207    set the bank register to the correct value (before the register is
 208    accessed), and back to 0 (afterwards). */
 209 static inline void w83627ehf_set_bank(struct i2c_client *client, u16 reg)
 210 {
 211         if (reg & 0xff00) {
 212                 outb_p(W83627EHF_REG_BANK, client->addr + ADDR_REG_OFFSET);
 213                 outb_p(reg >> 8, client->addr + DATA_REG_OFFSET);
 214         }
 215 }
 216
 217 static inline void w83627ehf_reset_bank(struct i2c_client *client, u16 reg)
 218 {
 219         if (reg & 0xff00) {
 220                 outb_p(W83627EHF_REG_BANK, client->addr + ADDR_REG_OFFSET);
 221                 outb_p(0, client->addr + DATA_REG_OFFSET);
 222         }
 223 }
 224
 225 static u16 w83627ehf_read_value(struct i2c_client *client, u16 reg)
 226 {
 227         struct w83627ehf_data *data = i2c_get_clientdata(client);
 228         int res, word_sized = is_word_sized(reg);
 229
 230         down(&data->lock);
 231
 232         w83627ehf_set_bank(client, reg);
 233         outb_p(reg & 0xff, client->addr + ADDR_REG_OFFSET);
 234         res = inb_p(client->addr + DATA_REG_OFFSET);
 235         if (word_sized) {
 236                 outb_p((reg & 0xff) + 1,
 237                        client->addr + ADDR_REG_OFFSET);
 238                 res = (res << 8) + inb_p(client->addr + DATA_REG_OFFSET);
 239         }
 240         w83627ehf_reset_bank(client, reg);
 241
 242         up(&data->lock);
 243
 244         return res;
 245 }
 246
 247 static int w83627ehf_write_value(struct i2c_client *client, u16 reg, u16 value)
 248 {
 249         struct w83627ehf_data *data = i2c_get_clientdata(client);
 250         int word_sized = is_word_sized(reg);
 251
 252         down(&data->lock);
 253
 254         w83627ehf_set_bank(client, reg);
 255         outb_p(reg & 0xff, client->addr + ADDR_REG_OFFSET);
 256         if (word_sized) {
 257                 outb_p(value >> 8, client->addr + DATA_REG_OFFSET);
 258                 outb_p((reg & 0xff) + 1,
 259                        client->addr + ADDR_REG_OFFSET);
 260         }
 261         outb_p(value & 0xff, client->addr + DATA_REG_OFFSET);
 262         w83627ehf_reset_bank(client, reg);
 263
 264         up(&data->lock);
 265         return 0;
 266 }
 267
 268 /* This function assumes that the caller holds data->update_lock */
 269 static void w83627ehf_write_fan_div(struct i2c_client *client, int nr)
 270 {
 271         struct w83627ehf_data *data = i2c_get_clientdata(client);
 272         u8 reg;
 273
 274         switch (nr) {
 275         case 0:
 276                 reg = (w83627ehf_read_value(client, W83627EHF_REG_FANDIV1) & 0xcf)
 277                     | ((data->fan_div[0] & 0x03) << 4);
 278                 w83627ehf_write_value(client, W83627EHF_REG_FANDIV1, reg);
 279                 reg = (w83627ehf_read_value(client, W83627EHF_REG_VBAT) & 0xdf)
 280                     | ((data->fan_div[0] & 0x04) << 3);
 281                 w83627ehf_write_value(client, W83627EHF_REG_VBAT, reg);
 282                 break;
 283         case 1:
 284                 reg = (w83627ehf_read_value(client, W83627EHF_REG_FANDIV1) & 0x3f)
 285                     | ((data->fan_div[1] & 0x03) << 6);
 286                 w83627ehf_write_value(client, W83627EHF_REG_FANDIV1, reg);
 287                 reg = (w83627ehf_read_value(client, W83627EHF_REG_VBAT) & 0xbf)
 288                     | ((data->fan_div[1] & 0x04) << 4);
 289                 w83627ehf_write_value(client, W83627EHF_REG_VBAT, reg);
 290                 break;
 291         case 2:
 292                 reg = (w83627ehf_read_value(client, W83627EHF_REG_FANDIV2) & 0x3f)
 293                     | ((data->fan_div[2] & 0x03) << 6);
 294                 w83627ehf_write_value(client, W83627EHF_REG_FANDIV2, reg);
 295                 reg = (w83627ehf_read_value(client, W83627EHF_REG_VBAT) & 0x7f)
 296                     | ((data->fan_div[2] & 0x04) << 5);
 297                 w83627ehf_write_value(client, W83627EHF_REG_VBAT, reg);
 298                 break;
 299         case 3:
 300                 reg = (w83627ehf_read_value(client, W83627EHF_REG_DIODE) & 0xfc)
 301                     | (data->fan_div[3] & 0x03);
 302                 w83627ehf_write_value(client, W83627EHF_REG_DIODE, reg);
 303                 reg = (w83627ehf_read_value(client, W83627EHF_REG_SMI_OVT) & 0x7f)
 304                     | ((data->fan_div[3] & 0x04) << 5);
 305                 w83627ehf_write_value(client, W83627EHF_REG_SMI_OVT, reg);
 306                 break;
 307         case 4:
 308                 reg = (w83627ehf_read_value(client, W83627EHF_REG_DIODE) & 0x73)
 309                     | ((data->fan_div[4] & 0x03) << 3)
 310                     | ((data->fan_div[4] & 0x04) << 5);
 311                 w83627ehf_write_value(client, W83627EHF_REG_DIODE, reg);
 312                 break;
 313         }
 314 }
 315
 316 static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
 317 {
 318         struct i2c_client *client = to_i2c_client(dev);
 319         struct w83627ehf_data *data = i2c_get_clientdata(client);
 320         int i;
 321
 322         down(&data->update_lock);
 323
 324         if (time_after(jiffies, data->last_updated + HZ)
 325          || !data->valid) {
 326                 /* Fan clock dividers */
 327                 i = w83627ehf_read_value(client, W83627EHF_REG_FANDIV1);
 328                 data->fan_div[0] = (i >> 4) & 0x03;
 329                 data->fan_div[1] = (i >> 6) & 0x03;
 330                 i = w83627ehf_read_value(client, W83627EHF_REG_FANDIV2);
 331                 data->fan_div[2] = (i >> 6) & 0x03;
 332                 i = w83627ehf_read_value(client, W83627EHF_REG_VBAT);
 333                 data->fan_div[0] |= (i >> 3) & 0x04;
 334                 data->fan_div[1] |= (i >> 4) & 0x04;
 335                 data->fan_div[2] |= (i >> 5) & 0x04;
 336                 if (data->has_fan & ((1 << 3) | (1 << 4))) {
 337                         i = w83627ehf_read_value(client, W83627EHF_REG_DIODE);
 338                         data->fan_div[3] = i & 0x03;
 339                         data->fan_div[4] = ((i >> 2) & 0x03)
 340                                          | ((i >> 5) & 0x04);
 341                 }
 342                 if (data->has_fan & (1 << 3)) {
 343                         i = w83627ehf_read_value(client, W83627EHF_REG_SMI_OVT);
 344                         data->fan_div[3] |= (i >> 5) & 0x04;
 345                 }
 346
 347                 /* Measured fan speeds and limits */
 348                 for (i = 0; i < 5; i++) {
 349                         if (!(data->has_fan & (1 << i)))
 350                                 continue;
 351
 352                         data->fan[i] = w83627ehf_read_value(client,
 353                                        W83627EHF_REG_FAN[i]);
 354                         data->fan_min[i] = w83627ehf_read_value(client,
 355                                            W83627EHF_REG_FAN_MIN[i]);
 356
 357                         /* If we failed to measure the fan speed and clock
 358                            divider can be increased, let's try that for next
 359                            time */
 360                         if (data->fan[i] == 0xff
 361                          && data->fan_div[i] < 0x07) {
 362                                 dev_dbg(&client->dev, "Increasing fan %d "
 363                                         "clock divider from %u to %u\n",
 364                                         i, div_from_reg(data->fan_div[i]),
 365                                         div_from_reg(data->fan_div[i] + 1));
 366                                 data->fan_div[i]++;
 367                                 w83627ehf_write_fan_div(client, i);
 368                                 /* Preserve min limit if possible */
 369                                 if (data->fan_min[i] >= 2
 370                                  && data->fan_min[i] != 255)
 371                                         w83627ehf_write_value(client,
 372                                                 W83627EHF_REG_FAN_MIN[i],
 373                                                 (data->fan_min[i] /= 2));
 374                         }
 375                 }
 376
 377                 /* Measured temperatures and limits */
 378                 data->temp1 = w83627ehf_read_value(client,
 379                               W83627EHF_REG_TEMP1);
 380                 data->temp1_max = w83627ehf_read_value(client,
 381                                   W83627EHF_REG_TEMP1_OVER);
 382                 data->temp1_max_hyst = w83627ehf_read_value(client,
 383                                        W83627EHF_REG_TEMP1_HYST);
 384                 for (i = 0; i < 2; i++) {
 385                         data->temp[i] = w83627ehf_read_value(client,
 386                                         W83627EHF_REG_TEMP[i]);
 387                         data->temp_max[i] = w83627ehf_read_value(client,
 388                                             W83627EHF_REG_TEMP_OVER[i]);
 389                         data->temp_max_hyst[i] = w83627ehf_read_value(client,
 390                                                  W83627EHF_REG_TEMP_HYST[i]);
 391                 }
 392
 393                 data->last_updated = jiffies;
 394                 data->valid = 1;
 395         }
 396
 397         up(&data->update_lock);
 398         return data;
 399 }
 400
 401 /*
 402  * Sysfs callback functions
 403  */
 404
 405 #define show_fan_reg(reg) \
 406 static ssize_t \
 407 show_##reg(struct device *dev, char *buf, int nr) \
 408 { \
 409         struct w83627ehf_data *data = w83627ehf_update_device(dev); \
 410         return sprintf(buf, "%d\n", \
 411                        fan_from_reg(data->reg[nr], \
 412                                     div_from_reg(data->fan_div[nr]))); \
 413 }
 414 show_fan_reg(fan);
 415 show_fan_reg(fan_min);
 416
 417 static ssize_t
 418 show_fan_div(struct device *dev, char *buf, int nr)
 419 {
 420         struct w83627ehf_data *data = w83627ehf_update_device(dev);
 421         return sprintf(buf, "%u\n",
 422                        div_from_reg(data->fan_div[nr]));
 423 }
 424
 425 static ssize_t
 426 store_fan_min(struct device *dev, const char *buf, size_t count, int nr)
 427 {
 428         struct i2c_client *client = to_i2c_client(dev);
 429         struct w83627ehf_data *data = i2c_get_clientdata(client);
 430         unsigned int val = simple_strtoul(buf, NULL, 10);
 431         unsigned int reg;
 432         u8 new_div;
 433
 434         down(&data->update_lock);
 435         if (!val) {
 436                 /* No min limit, alarm disabled */
 437                 data->fan_min[nr] = 255;
 438                 new_div = data->fan_div[nr]; /* No change */
 439                 dev_info(dev, "fan%u low limit and alarm disabled\n", nr + 1);
 440         } else if ((reg = 1350000U / val) >= 128 * 255) {
 441                 /* Speed below this value cannot possibly be represented,
 442                    even with the highest divider (128) */
 443                 data->fan_min[nr] = 254;
 444                 new_div = 7; /* 128 == (1 << 7) */
 445                 dev_warn(dev, "fan%u low limit %u below minimum %u, set to "
 446                          "minimum\n", nr + 1, val, fan_from_reg(254, 128));
 447         } else if (!reg) {
 448                 /* Speed above this value cannot possibly be represented,
 449                    even with the lowest divider (1) */
 450                 data->fan_min[nr] = 1;
 451                 new_div = 0; /* 1 == (1 << 0) */
 452                 dev_warn(dev, "fan%u low limit %u above maximum %u, set to "
 453                          "maximum\n", nr + 1, val, fan_from_reg(1, 1));
 454         } else {
 455                 /* Automatically pick the best divider, i.e. the one such
 456                    that the min limit will correspond to a register value
 457                    in the 96..192 range */
 458                 new_div = 0;
 459                 while (reg > 192 && new_div < 7) {
 460                         reg >>= 1;
 461                         new_div++;
 462                 }
 463                 data->fan_min[nr] = reg;
 464         }
 465
 466         /* Write both the fan clock divider (if it changed) and the new
 467            fan min (unconditionally) */
 468         if (new_div != data->fan_div[nr]) {
 469                 if (new_div > data->fan_div[nr])
 470                         data->fan[nr] >>= (data->fan_div[nr] - new_div);
 471                 else
 472                         data->fan[nr] <<= (new_div - data->fan_div[nr]);
 473
 474                 dev_dbg(dev, "fan%u clock divider changed from %u to %u\n",
 475                         nr + 1, div_from_reg(data->fan_div[nr]),
 476                         div_from_reg(new_div));
 477                 data->fan_div[nr] = new_div;
 478                 w83627ehf_write_fan_div(client, nr);
 479         }
 480         w83627ehf_write_value(client, W83627EHF_REG_FAN_MIN[nr],
 481                               data->fan_min[nr]);
 482         up(&data->update_lock);
 483
 484         return count;
 485 }
 486
 487 #define sysfs_fan_offset(offset) \
 488 static ssize_t \
 489 show_reg_fan_##offset(struct device *dev, struct device_attribute *attr, \
 490                       char *buf) \
 491 { \
 492         return show_fan(dev, buf, offset-1); \
 493 } \
 494 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
 495                    show_reg_fan_##offset, NULL);
 496
 497 #define sysfs_fan_min_offset(offset) \
 498 static ssize_t \
 499 show_reg_fan##offset##_min(struct device *dev, struct device_attribute *attr, \
 500                            char *buf) \
 501 { \
 502         return show_fan_min(dev, buf, offset-1); \
 503 } \
 504 static ssize_t \
 505 store_reg_fan##offset##_min(struct device *dev, struct device_attribute *attr, \
 506                             const char *buf, size_t count) \
 507 { \
 508         return store_fan_min(dev, buf, count, offset-1); \
 509 } \
 510 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
 511                    show_reg_fan##offset##_min, \
 512                    store_reg_fan##offset##_min);
 513
 514 #define sysfs_fan_div_offset(offset) \
 515 static ssize_t \
 516 show_reg_fan##offset##_div(struct device *dev, struct device_attribute *attr, \
 517                            char *buf) \
 518 { \
 519         return show_fan_div(dev, buf, offset - 1); \
 520 } \
 521 static DEVICE_ATTR(fan##offset##_div, S_IRUGO, \
 522                    show_reg_fan##offset##_div, NULL);
 523
 524 sysfs_fan_offset(1);
 525 sysfs_fan_min_offset(1);
 526 sysfs_fan_div_offset(1);
 527 sysfs_fan_offset(2);
 528 sysfs_fan_min_offset(2);
 529 sysfs_fan_div_offset(2);
 530 sysfs_fan_offset(3);
 531 sysfs_fan_min_offset(3);
 532 sysfs_fan_div_offset(3);
 533 sysfs_fan_offset(4);
 534 sysfs_fan_min_offset(4);
 535 sysfs_fan_div_offset(4);
 536 sysfs_fan_offset(5);
 537 sysfs_fan_min_offset(5);
 538 sysfs_fan_div_offset(5);
 539
 540 #define show_temp1_reg(reg) \
 541 static ssize_t \
 542 show_##reg(struct device *dev, struct device_attribute *attr, \
 543            char *buf) \
 544 { \
 545         struct w83627ehf_data *data = w83627ehf_update_device(dev); \
 546         return sprintf(buf, "%d\n", temp1_from_reg(data->reg)); \
 547 }
 548 show_temp1_reg(temp1);
 549 show_temp1_reg(temp1_max);
 550 show_temp1_reg(temp1_max_hyst);
 551
 552 #define store_temp1_reg(REG, reg) \
 553 static ssize_t \
 554 store_temp1_##reg(struct device *dev, struct device_attribute *attr, \
 555                   const char *buf, size_t count) \
 556 { \
 557         struct i2c_client *client = to_i2c_client(dev); \
 558         struct w83627ehf_data *data = i2c_get_clientdata(client); \
 559         u32 val = simple_strtoul(buf, NULL, 10); \
 560  \
 561         down(&data->update_lock); \
 562         data->temp1_##reg = temp1_to_reg(val); \
 563         w83627ehf_write_value(client, W83627EHF_REG_TEMP1_##REG, \
 564                               data->temp1_##reg); \
 565         up(&data->update_lock); \
 566         return count; \
 567 }
 568 store_temp1_reg(OVER, max);
 569 store_temp1_reg(HYST, max_hyst);
 570
 571 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp1, NULL);
 572 static DEVICE_ATTR(temp1_max, S_IRUGO| S_IWUSR,
 573                    show_temp1_max, store_temp1_max);
 574 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO| S_IWUSR,
 575                    show_temp1_max_hyst, store_temp1_max_hyst);
 576
 577 #define show_temp_reg(reg) \
 578 static ssize_t \
 579 show_##reg (struct device *dev, char *buf, int nr) \
 580 { \
 581         struct w83627ehf_data *data = w83627ehf_update_device(dev); \
 582         return sprintf(buf, "%d\n", \
 583                        LM75_TEMP_FROM_REG(data->reg[nr])); \
 584 }
 585 show_temp_reg(temp);
 586 show_temp_reg(temp_max);
 587 show_temp_reg(temp_max_hyst);
 588
 589 #define store_temp_reg(REG, reg) \
 590 static ssize_t \
 591 store_##reg (struct device *dev, const char *buf, size_t count, int nr) \
 592 { \
 593         struct i2c_client *client = to_i2c_client(dev); \
 594         struct w83627ehf_data *data = i2c_get_clientdata(client); \
 595         u32 val = simple_strtoul(buf, NULL, 10); \
 596  \
 597         down(&data->update_lock); \
 598         data->reg[nr] = LM75_TEMP_TO_REG(val); \
 599         w83627ehf_write_value(client, W83627EHF_REG_TEMP_##REG[nr], \
 600                               data->reg[nr]); \
 601         up(&data->update_lock); \
 602         return count; \
 603 }
 604 store_temp_reg(OVER, temp_max);
 605 store_temp_reg(HYST, temp_max_hyst);
 606
 607 #define sysfs_temp_offset(offset) \
 608 static ssize_t \
 609 show_reg_temp##offset (struct device *dev, struct device_attribute *attr, \
 610                        char *buf) \
 611 { \
 612         return show_temp(dev, buf, offset - 2); \
 613 } \
 614 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
 615                    show_reg_temp##offset, NULL);
 616
 617 #define sysfs_temp_reg_offset(reg, offset) \
 618 static ssize_t \
 619 show_reg_temp##offset##_##reg(struct device *dev, struct device_attribute *attr, \
 620                               char *buf) \
 621 { \
 622         return show_temp_##reg(dev, buf, offset - 2); \
 623 } \
 624 static ssize_t \
 625 store_reg_temp##offset##_##reg(struct device *dev, struct device_attribute *attr, \
 626                                const char *buf, size_t count) \
 627 { \
 628         return store_temp_##reg(dev, buf, count, offset - 2); \
 629 } \
 630 static DEVICE_ATTR(temp##offset##_##reg, S_IRUGO| S_IWUSR, \
 631                    show_reg_temp##offset##_##reg, \
 632                    store_reg_temp##offset##_##reg);
 633
 634 sysfs_temp_offset(2);
 635 sysfs_temp_reg_offset(max, 2);
 636 sysfs_temp_reg_offset(max_hyst, 2);
 637 sysfs_temp_offset(3);
 638 sysfs_temp_reg_offset(max, 3);
 639 sysfs_temp_reg_offset(max_hyst, 3);
 640
 641 /*
 642  * Driver and client management
 643  */
 644
 645 static struct i2c_driver w83627ehf_driver;
 646
 647 static void w83627ehf_init_client(struct i2c_client *client)
 648 {
 649         int i;
 650         u8 tmp;
 651
 652         /* Start monitoring is needed */
 653         tmp = w83627ehf_read_value(client, W83627EHF_REG_CONFIG);
 654         if (!(tmp & 0x01))
 655                 w83627ehf_write_value(client, W83627EHF_REG_CONFIG,
 656                                       tmp | 0x01);
 657
 658         /* Enable temp2 and temp3 if needed */
 659         for (i = 0; i < 2; i++) {
 660                 tmp = w83627ehf_read_value(client,
 661                                            W83627EHF_REG_TEMP_CONFIG[i]);
 662                 if (tmp & 0x01)
 663                         w83627ehf_write_value(client,
 664                                               W83627EHF_REG_TEMP_CONFIG[i],
 665                                               tmp & 0xfe);
 666         }
 667 }
 668
 669 static int w83627ehf_detect(struct i2c_adapter *adapter, int address, int kind)
 670 {
 671         struct i2c_client *client;
 672         struct w83627ehf_data *data;
 673         int i, err = 0;
 674
 675         if (!i2c_is_isa_adapter(adapter))
 676                 return 0;
 677
 678         if (!request_region(address, REGION_LENGTH, w83627ehf_driver.name)) {
 679                 err = -EBUSY;
 680                 goto exit;
 681         }
 682
 683         if (!(data = kmalloc(sizeof(struct w83627ehf_data), GFP_KERNEL))) {
 684                 err = -ENOMEM;
 685                 goto exit_release;
 686         }
 687         memset(data, 0, sizeof(struct w83627ehf_data));
 688
 689         client = &data->client;
 690         i2c_set_clientdata(client, data);
 691         client->addr = address;
 692         init_MUTEX(&data->lock);
 693         client->adapter = adapter;
 694         client->driver = &w83627ehf_driver;
 695         client->flags = 0;
 696
 697         strlcpy(client->name, "w83627ehf", I2C_NAME_SIZE);
 698         data->valid = 0;
 699         init_MUTEX(&data->update_lock);
 700
 701         /* Tell the i2c layer a new client has arrived */
 702         if ((err = i2c_attach_client(client)))
 703                 goto exit_free;
 704
 705         /* Initialize the chip */
 706         w83627ehf_init_client(client);
 707
 708         /* A few vars need to be filled upon startup */
 709         for (i = 0; i < 5; i++)
 710                 data->fan_min[i] = w83627ehf_read_value(client,
 711                                    W83627EHF_REG_FAN_MIN[i]);
 712
 713         /* It looks like fan4 and fan5 pins can be alternatively used
 714            as fan on/off switches */
 715         data->has_fan = 0x07; /* fan1, fan2 and fan3 */
 716         i = w83627ehf_read_value(client, W83627EHF_REG_FANDIV1);
 717         if (i & (1 << 2))
 718                 data->has_fan |= (1 << 3);
 719         if (i & (1 << 0))
 720                 data->has_fan |= (1 << 4);
 721
 722         /* Register sysfs hooks */
 723         device_create_file(&client->dev, &dev_attr_fan1_input);
 724         device_create_file(&client->dev, &dev_attr_fan1_min);
 725         device_create_file(&client->dev, &dev_attr_fan1_div);
 726         device_create_file(&client->dev, &dev_attr_fan2_input);
 727         device_create_file(&client->dev, &dev_attr_fan2_min);
 728         device_create_file(&client->dev, &dev_attr_fan2_div);
 729         device_create_file(&client->dev, &dev_attr_fan3_input);
 730         device_create_file(&client->dev, &dev_attr_fan3_min);
 731         device_create_file(&client->dev, &dev_attr_fan3_div);
 732
 733         if (data->has_fan & (1 << 3)) {
 734                 device_create_file(&client->dev, &dev_attr_fan4_input);
 735                 device_create_file(&client->dev, &dev_attr_fan4_min);
 736                 device_create_file(&client->dev, &dev_attr_fan4_div);
 737         }
 738         if (data->has_fan & (1 << 4)) {
 739                 device_create_file(&client->dev, &dev_attr_fan5_input);
 740                 device_create_file(&client->dev, &dev_attr_fan5_min);
 741                 device_create_file(&client->dev, &dev_attr_fan5_div);
 742         }
 743
 744         device_create_file(&client->dev, &dev_attr_temp1_input);
 745         device_create_file(&client->dev, &dev_attr_temp1_max);
 746         device_create_file(&client->dev, &dev_attr_temp1_max_hyst);
 747         device_create_file(&client->dev, &dev_attr_temp2_input);
 748         device_create_file(&client->dev, &dev_attr_temp2_max);
 749         device_create_file(&client->dev, &dev_attr_temp2_max_hyst);
 750         device_create_file(&client->dev, &dev_attr_temp3_input);
 751         device_create_file(&client->dev, &dev_attr_temp3_max);
 752         device_create_file(&client->dev, &dev_attr_temp3_max_hyst);
 753
 754         return 0;
 755
 756 exit_free:
 757         kfree(data);
 758 exit_release:
 759         release_region(address, REGION_LENGTH);
 760 exit:
 761         return err;
 762 }
 763
 764 static int w83627ehf_attach_adapter(struct i2c_adapter *adapter)
 765 {
 766         if (!(adapter->class & I2C_CLASS_HWMON))
 767                 return 0;
 768         return i2c_detect(adapter, &addr_data, w83627ehf_detect);
 769 }
 770
 771 static int w83627ehf_detach_client(struct i2c_client *client)
 772 {
 773         int err;
 774
 775         if ((err = i2c_detach_client(client))) {
 776                 dev_err(&client->dev, "Client deregistration failed, "
 777                         "client not detached.\n");
 778                 return err;
 779         }
 780         release_region(client->addr, REGION_LENGTH);
 781         kfree(i2c_get_clientdata(client));
 782
 783         return 0;
 784 }
 785
 786 static struct i2c_driver w83627ehf_driver = {
 787         .owner          = THIS_MODULE,
 788         .name           = "w83627ehf",
 789         .flags          = I2C_DF_NOTIFY,
 790         .attach_adapter = w83627ehf_attach_adapter,
 791         .detach_client  = w83627ehf_detach_client,
 792 };
 793
 794 static int __init w83627ehf_find(int sioaddr, int *address)
 795 {
 796         u16 val;
 797
 798         REG = sioaddr;
 799         VAL = sioaddr + 1;
 800         superio_enter();
 801
 802         val = (superio_inb(SIO_REG_DEVID) << 8)
 803             | superio_inb(SIO_REG_DEVID + 1);
 804         if ((val & SIO_ID_MASK) != SIO_W83627EHF_ID) {
 805                 superio_exit();
 806                 return -ENODEV;
 807         }
 808
 809         superio_select(W83627EHF_LD_HWM);
 810         val = (superio_inb(SIO_REG_ADDR) << 8)
 811             | superio_inb(SIO_REG_ADDR + 1);
 812         *address = val & ~(REGION_LENGTH - 1);
 813         if (*address == 0) {
 814                 superio_exit();
 815                 return -ENODEV;
 816         }
 817
 818         /* Activate logical device if needed */
 819         val = superio_inb(SIO_REG_ENABLE);
 820         if (!(val & 0x01))
 821                 superio_outb(SIO_REG_ENABLE, val | 0x01);
 822
 823         superio_exit();
 824         return 0;
 825 }
 826
 827 static int __init sensors_w83627ehf_init(void)
 828 {
 829         if (w83627ehf_find(0x2e, &normal_isa[0])
 830          && w83627ehf_find(0x4e, &normal_isa[0]))
 831                 return -ENODEV;
 832
 833         return i2c_add_driver(&w83627ehf_driver);
 834 }
 835
 836 static void __exit sensors_w83627ehf_exit(void)
 837 {
 838         i2c_del_driver(&w83627ehf_driver);
 839 }
 840
 841 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
 842 MODULE_DESCRIPTION("W83627EHF driver");
 843 MODULE_LICENSE("GPL");
 844
 845 module_init(sensors_w83627ehf_init);
 846 module_exit(sensors_w83627ehf_exit);