drivers/i2c/chips/w83627ehf.c

   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, 0));
 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, char *buf) \
 490 { \
 491         return show_fan(dev, buf, offset-1); \
 492 } \
 493 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
 494                    show_reg_fan_##offset, NULL);
 495
 496 #define sysfs_fan_min_offset(offset) \
 497 static ssize_t \
 498 show_reg_fan##offset##_min(struct device *dev, char *buf) \
 499 { \
 500         return show_fan_min(dev, buf, offset-1); \
 501 } \
 502 static ssize_t \
 503 store_reg_fan##offset##_min(struct device *dev, const char *buf, \
 504                             size_t count) \
 505 { \
 506         return store_fan_min(dev, buf, count, offset-1); \
 507 } \
 508 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
 509                    show_reg_fan##offset##_min, \
 510                    store_reg_fan##offset##_min);
 511
 512 #define sysfs_fan_div_offset(offset) \
 513 static ssize_t \
 514 show_reg_fan##offset##_div(struct device *dev, char *buf) \
 515 { \
 516         return show_fan_div(dev, buf, offset - 1); \
 517 } \
 518 static DEVICE_ATTR(fan##offset##_div, S_IRUGO, \
 519                    show_reg_fan##offset##_div, NULL);
 520
 521 sysfs_fan_offset(1);
 522 sysfs_fan_min_offset(1);
 523 sysfs_fan_div_offset(1);
 524 sysfs_fan_offset(2);
 525 sysfs_fan_min_offset(2);
 526 sysfs_fan_div_offset(2);
 527 sysfs_fan_offset(3);
 528 sysfs_fan_min_offset(3);
 529 sysfs_fan_div_offset(3);
 530 sysfs_fan_offset(4);
 531 sysfs_fan_min_offset(4);
 532 sysfs_fan_div_offset(4);
 533 sysfs_fan_offset(5);
 534 sysfs_fan_min_offset(5);
 535 sysfs_fan_div_offset(5);
 536
 537 #define show_temp1_reg(reg) \
 538 static ssize_t \
 539 show_##reg(struct device *dev, char *buf) \
 540 { \
 541         struct w83627ehf_data *data = w83627ehf_update_device(dev); \
 542         return sprintf(buf, "%d\n", temp1_from_reg(data->reg)); \
 543 }
 544 show_temp1_reg(temp1);
 545 show_temp1_reg(temp1_max);
 546 show_temp1_reg(temp1_max_hyst);
 547
 548 #define store_temp1_reg(REG, reg) \
 549 static ssize_t \
 550 store_temp1_##reg(struct device *dev, const char *buf, size_t count) \
 551 { \
 552         struct i2c_client *client = to_i2c_client(dev); \
 553         struct w83627ehf_data *data = i2c_get_clientdata(client); \
 554         u32 val = simple_strtoul(buf, NULL, 10); \
 555  \
 556         down(&data->update_lock); \
 557         data->temp1_##reg = temp1_to_reg(val); \
 558         w83627ehf_write_value(client, W83627EHF_REG_TEMP1_##REG, \
 559                               data->temp1_##reg); \
 560         up(&data->update_lock); \
 561         return count; \
 562 }
 563 store_temp1_reg(OVER, max);
 564 store_temp1_reg(HYST, max_hyst);
 565
 566 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp1, NULL);
 567 static DEVICE_ATTR(temp1_max, S_IRUGO| S_IWUSR,
 568                    show_temp1_max, store_temp1_max);
 569 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO| S_IWUSR,
 570                    show_temp1_max_hyst, store_temp1_max_hyst);
 571
 572 #define show_temp_reg(reg) \
 573 static ssize_t \
 574 show_##reg (struct device *dev, char *buf, int nr) \
 575 { \
 576         struct w83627ehf_data *data = w83627ehf_update_device(dev); \
 577         return sprintf(buf, "%d\n", \
 578                        LM75_TEMP_FROM_REG(data->reg[nr])); \
 579 }
 580 show_temp_reg(temp);
 581 show_temp_reg(temp_max);
 582 show_temp_reg(temp_max_hyst);
 583
 584 #define store_temp_reg(REG, reg) \
 585 static ssize_t \
 586 store_##reg (struct device *dev, const char *buf, size_t count, int nr) \
 587 { \
 588         struct i2c_client *client = to_i2c_client(dev); \
 589         struct w83627ehf_data *data = i2c_get_clientdata(client); \
 590         u32 val = simple_strtoul(buf, NULL, 10); \
 591  \
 592         down(&data->update_lock); \
 593         data->reg[nr] = LM75_TEMP_TO_REG(val); \
 594         w83627ehf_write_value(client, W83627EHF_REG_TEMP_##REG[nr], \
 595                               data->reg[nr]); \
 596         up(&data->update_lock); \
 597         return count; \
 598 }
 599 store_temp_reg(OVER, temp_max);
 600 store_temp_reg(HYST, temp_max_hyst);
 601
 602 #define sysfs_temp_offset(offset) \
 603 static ssize_t \
 604 show_reg_temp##offset (struct device *dev, char *buf) \
 605 { \
 606         return show_temp(dev, buf, offset - 2); \
 607 } \
 608 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
 609                    show_reg_temp##offset, NULL);
 610
 611 #define sysfs_temp_reg_offset(reg, offset) \
 612 static ssize_t \
 613 show_reg_temp##offset##_##reg(struct device *dev, char *buf) \
 614 { \
 615         return show_temp_##reg(dev, buf, offset - 2); \
 616 } \
 617 static ssize_t \
 618 store_reg_temp##offset##_##reg(struct device *dev, const char *buf, \
 619                                size_t count) \
 620 { \
 621         return store_temp_##reg(dev, buf, count, offset - 2); \
 622 } \
 623 static DEVICE_ATTR(temp##offset##_##reg, S_IRUGO| S_IWUSR, \
 624                    show_reg_temp##offset##_##reg, \
 625                    store_reg_temp##offset##_##reg);
 626
 627 sysfs_temp_offset(2);
 628 sysfs_temp_reg_offset(max, 2);
 629 sysfs_temp_reg_offset(max_hyst, 2);
 630 sysfs_temp_offset(3);
 631 sysfs_temp_reg_offset(max, 3);
 632 sysfs_temp_reg_offset(max_hyst, 3);
 633
 634 /*
 635  * Driver and client management
 636  */
 637
 638 static struct i2c_driver w83627ehf_driver;
 639
 640 static void w83627ehf_init_client(struct i2c_client *client)
 641 {
 642         int i;
 643         u8 tmp;
 644
 645         /* Start monitoring is needed */
 646         tmp = w83627ehf_read_value(client, W83627EHF_REG_CONFIG);
 647         if (!(tmp & 0x01))
 648                 w83627ehf_write_value(client, W83627EHF_REG_CONFIG,
 649                                       tmp | 0x01);
 650
 651         /* Enable temp2 and temp3 if needed */
 652         for (i = 0; i < 2; i++) {
 653                 tmp = w83627ehf_read_value(client,
 654                                            W83627EHF_REG_TEMP_CONFIG[i]);
 655                 if (tmp & 0x01)
 656                         w83627ehf_write_value(client,
 657                                               W83627EHF_REG_TEMP_CONFIG[i],
 658                                               tmp & 0xfe);
 659         }
 660 }
 661
 662 static int w83627ehf_detect(struct i2c_adapter *adapter, int address, int kind)
 663 {
 664         struct i2c_client *client;
 665         struct w83627ehf_data *data;
 666         int i, err = 0;
 667
 668         if (!i2c_is_isa_adapter(adapter))
 669                 return 0;
 670
 671         if (!request_region(address, REGION_LENGTH, w83627ehf_driver.name)) {
 672                 err = -EBUSY;
 673                 goto exit;
 674         }
 675
 676         if (!(data = kmalloc(sizeof(struct w83627ehf_data), GFP_KERNEL))) {
 677                 err = -ENOMEM;
 678                 goto exit_release;
 679         }
 680         memset(data, 0, sizeof(struct w83627ehf_data));
 681
 682         client = &data->client;
 683         i2c_set_clientdata(client, data);
 684         client->addr = address;
 685         init_MUTEX(&data->lock);
 686         client->adapter = adapter;
 687         client->driver = &w83627ehf_driver;
 688         client->flags = 0;
 689
 690         strlcpy(client->name, "w83627ehf", I2C_NAME_SIZE);
 691         data->valid = 0;
 692         init_MUTEX(&data->update_lock);
 693
 694         /* Tell the i2c layer a new client has arrived */
 695         if ((err = i2c_attach_client(client)))
 696                 goto exit_free;
 697
 698         /* Initialize the chip */
 699         w83627ehf_init_client(client);
 700
 701         /* A few vars need to be filled upon startup */
 702         for (i = 0; i < 5; i++)
 703                 data->fan_min[i] = w83627ehf_read_value(client,
 704                                    W83627EHF_REG_FAN_MIN[i]);
 705
 706         /* It looks like fan4 and fan5 pins can be alternatively used
 707            as fan on/off switches */
 708         data->has_fan = 0x07; /* fan1, fan2 and fan3 */
 709         i = w83627ehf_read_value(client, W83627EHF_REG_FANDIV1);
 710         if (i & (1 << 2))
 711                 data->has_fan |= (1 << 3);
 712         if (i & (1 << 0))
 713                 data->has_fan |= (1 << 4);
 714
 715         /* Register sysfs hooks */
 716         device_create_file(&client->dev, &dev_attr_fan1_input);
 717         device_create_file(&client->dev, &dev_attr_fan1_min);
 718         device_create_file(&client->dev, &dev_attr_fan1_div);
 719         device_create_file(&client->dev, &dev_attr_fan2_input);
 720         device_create_file(&client->dev, &dev_attr_fan2_min);
 721         device_create_file(&client->dev, &dev_attr_fan2_div);
 722         device_create_file(&client->dev, &dev_attr_fan3_input);
 723         device_create_file(&client->dev, &dev_attr_fan3_min);
 724         device_create_file(&client->dev, &dev_attr_fan3_div);
 725
 726         if (data->has_fan & (1 << 3)) {
 727                 device_create_file(&client->dev, &dev_attr_fan4_input);
 728                 device_create_file(&client->dev, &dev_attr_fan4_min);
 729                 device_create_file(&client->dev, &dev_attr_fan4_div);
 730         }
 731         if (data->has_fan & (1 << 4)) {
 732                 device_create_file(&client->dev, &dev_attr_fan5_input);
 733                 device_create_file(&client->dev, &dev_attr_fan5_min);
 734                 device_create_file(&client->dev, &dev_attr_fan5_div);
 735         }
 736
 737         device_create_file(&client->dev, &dev_attr_temp1_input);
 738         device_create_file(&client->dev, &dev_attr_temp1_max);
 739         device_create_file(&client->dev, &dev_attr_temp1_max_hyst);
 740         device_create_file(&client->dev, &dev_attr_temp2_input);
 741         device_create_file(&client->dev, &dev_attr_temp2_max);
 742         device_create_file(&client->dev, &dev_attr_temp2_max_hyst);
 743         device_create_file(&client->dev, &dev_attr_temp3_input);
 744         device_create_file(&client->dev, &dev_attr_temp3_max);
 745         device_create_file(&client->dev, &dev_attr_temp3_max_hyst);
 746
 747         return 0;
 748
 749 exit_free:
 750         kfree(data);
 751 exit_release:
 752         release_region(address, REGION_LENGTH);
 753 exit:
 754         return err;
 755 }
 756
 757 static int w83627ehf_attach_adapter(struct i2c_adapter *adapter)
 758 {
 759         if (!(adapter->class & I2C_CLASS_HWMON))
 760                 return 0;
 761         return i2c_detect(adapter, &addr_data, w83627ehf_detect);
 762 }
 763
 764 static int w83627ehf_detach_client(struct i2c_client *client)
 765 {
 766         int err;
 767
 768         if ((err = i2c_detach_client(client))) {
 769                 dev_err(&client->dev, "Client deregistration failed, "
 770                         "client not detached.\n");
 771                 return err;
 772         }
 773         release_region(client->addr, REGION_LENGTH);
 774         kfree(i2c_get_clientdata(client));
 775
 776         return 0;
 777 }
 778
 779 static struct i2c_driver w83627ehf_driver = {
 780         .owner          = THIS_MODULE,
 781         .name           = "w83627ehf",
 782         .flags          = I2C_DF_NOTIFY,
 783         .attach_adapter = w83627ehf_attach_adapter,
 784         .detach_client  = w83627ehf_detach_client,
 785 };
 786
 787 static int __init w83627ehf_find(int sioaddr, int *address)
 788 {
 789         u16 val;
 790
 791         REG = sioaddr;
 792         VAL = sioaddr + 1;
 793         superio_enter();
 794
 795         val = (superio_inb(SIO_REG_DEVID) << 8)
 796             | superio_inb(SIO_REG_DEVID + 1);
 797         if ((val & SIO_ID_MASK) != SIO_W83627EHF_ID) {
 798                 superio_exit();
 799                 return -ENODEV;
 800         }
 801
 802         superio_select(W83627EHF_LD_HWM);
 803         val = (superio_inb(SIO_REG_ADDR) << 8)
 804             | superio_inb(SIO_REG_ADDR + 1);
 805         *address = val & ~(REGION_LENGTH - 1);
 806         if (*address == 0) {
 807                 superio_exit();
 808                 return -ENODEV;
 809         }
 810
 811         /* Activate logical device if needed */
 812         val = superio_inb(SIO_REG_ENABLE);
 813         if (!(val & 0x01))
 814                 superio_outb(SIO_REG_ENABLE, val | 0x01);
 815
 816         superio_exit();
 817         return 0;
 818 }
 819
 820 static int __init sensors_w83627ehf_init(void)
 821 {
 822         if (w83627ehf_find(0x2e, &normal_isa[0])
 823          && w83627ehf_find(0x4e, &normal_isa[0]))
 824                 return -ENODEV;
 825
 826         return i2c_add_driver(&w83627ehf_driver);
 827 }
 828
 829 static void __exit sensors_w83627ehf_exit(void)
 830 {
 831         i2c_del_driver(&w83627ehf_driver);
 832 }
 833
 834 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
 835 MODULE_DESCRIPTION("W83627EHF driver");
 836 MODULE_LICENSE("GPL");
 837
 838 module_init(sensors_w83627ehf_init);
 839 module_exit(sensors_w83627ehf_exit);