drivers/hwmon/f71805f.c

   1 /*
   2  * f71805f.c - driver for the Fintek F71805F/FG Super-I/O chip integrated
   3  *             hardware monitoring features
   4  * Copyright (C) 2005  Jean Delvare <khali@linux-fr.org>
   5  *
   6  * The F71805F/FG is a LPC Super-I/O chip made by Fintek. It integrates
   7  * complete hardware monitoring features: voltage, fan and temperature
   8  * sensors, and manual and automatic fan speed control.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  */
  24
  25 #include <linux/module.h>
  26 #include <linux/init.h>
  27 #include <linux/slab.h>
  28 #include <linux/jiffies.h>
  29 #include <linux/platform_device.h>
  30 #include <linux/hwmon.h>
  31 #include <linux/hwmon-sysfs.h>
  32 #include <linux/err.h>
  33 #include <asm/io.h>
  34
  35 static struct platform_device *pdev;
  36
  37 #define DRVNAME "f71805f"
  38
  39 /*
  40  * Super-I/O constants and functions
  41  */
  42
  43 #define F71805F_LD_HWM          0x04
  44
  45 #define SIO_REG_LDSEL           0x07    /* Logical device select */
  46 #define SIO_REG_DEVID           0x20    /* Device ID (2 bytes) */
  47 #define SIO_REG_DEVREV          0x22    /* Device revision */
  48 #define SIO_REG_MANID           0x23    /* Fintek ID (2 bytes) */
  49 #define SIO_REG_ENABLE          0x30    /* Logical device enable */
  50 #define SIO_REG_ADDR            0x60    /* Logical device address (2 bytes) */
  51
  52 #define SIO_FINTEK_ID           0x1934
  53 #define SIO_F71805F_ID          0x0406
  54
  55 static inline int
  56 superio_inb(int base, int reg)
  57 {
  58         outb(reg, base);
  59         return inb(base + 1);
  60 }
  61
  62 static int
  63 superio_inw(int base, int reg)
  64 {
  65         int val;
  66         outb(reg++, base);
  67         val = inb(base + 1) << 8;
  68         outb(reg, base);
  69         val |= inb(base + 1);
  70         return val;
  71 }
  72
  73 static inline void
  74 superio_select(int base, int ld)
  75 {
  76         outb(SIO_REG_LDSEL, base);
  77         outb(ld, base + 1);
  78 }
  79
  80 static inline void
  81 superio_enter(int base)
  82 {
  83         outb(0x87, base);
  84         outb(0x87, base);
  85 }
  86
  87 static inline void
  88 superio_exit(int base)
  89 {
  90         outb(0xaa, base);
  91 }
  92
  93 /*
  94  * ISA constants
  95  */
  96
  97 #define REGION_LENGTH           2
  98 #define ADDR_REG_OFFSET         0
  99 #define DATA_REG_OFFSET         1
 100
 101 static struct resource f71805f_resource __initdata = {
 102         .flags  = IORESOURCE_IO,
 103 };
 104
 105 /*
 106  * Registers
 107  */
 108
 109 /* in nr from 0 to 8 (8-bit values) */
 110 #define F71805F_REG_IN(nr)              (0x10 + (nr))
 111 #define F71805F_REG_IN_HIGH(nr)         (0x40 + 2 * (nr))
 112 #define F71805F_REG_IN_LOW(nr)          (0x41 + 2 * (nr))
 113 /* fan nr from 0 to 2 (12-bit values, two registers) */
 114 #define F71805F_REG_FAN(nr)             (0x20 + 2 * (nr))
 115 #define F71805F_REG_FAN_LOW(nr)         (0x28 + 2 * (nr))
 116 #define F71805F_REG_FAN_CTRL(nr)        (0x60 + 16 * (nr))
 117 /* temp nr from 0 to 2 (8-bit values) */
 118 #define F71805F_REG_TEMP(nr)            (0x1B + (nr))
 119 #define F71805F_REG_TEMP_HIGH(nr)       (0x54 + 2 * (nr))
 120 #define F71805F_REG_TEMP_HYST(nr)       (0x55 + 2 * (nr))
 121 #define F71805F_REG_TEMP_MODE           0x01
 122
 123 #define F71805F_REG_START               0x00
 124 /* status nr from 0 to 2 */
 125 #define F71805F_REG_STATUS(nr)          (0x36 + (nr))
 126
 127 /*
 128  * Data structures and manipulation thereof
 129  */
 130
 131 struct f71805f_data {
 132         unsigned short addr;
 133         const char *name;
 134         struct semaphore lock;
 135         struct class_device *class_dev;
 136
 137         struct semaphore update_lock;
 138         char valid;             /* !=0 if following fields are valid */
 139         unsigned long last_updated;     /* In jiffies */
 140         unsigned long last_limits;      /* In jiffies */
 141
 142         /* Register values */
 143         u8 in[9];
 144         u8 in_high[9];
 145         u8 in_low[9];
 146         u16 fan[3];
 147         u16 fan_low[3];
 148         u8 fan_enabled;         /* Read once at init time */
 149         u8 temp[3];
 150         u8 temp_high[3];
 151         u8 temp_hyst[3];
 152         u8 temp_mode;
 153         u8 alarms[3];
 154 };
 155
 156 static inline long in_from_reg(u8 reg)
 157 {
 158         return (reg * 8);
 159 }
 160
 161 /* The 2 least significant bits are not used */
 162 static inline u8 in_to_reg(long val)
 163 {
 164         if (val <= 0)
 165                 return 0;
 166         if (val >= 2016)
 167                 return 0xfc;
 168         return (((val + 16) / 32) << 2);
 169 }
 170
 171 /* in0 is downscaled by a factor 2 internally */
 172 static inline long in0_from_reg(u8 reg)
 173 {
 174         return (reg * 16);
 175 }
 176
 177 static inline u8 in0_to_reg(long val)
 178 {
 179         if (val <= 0)
 180                 return 0;
 181         if (val >= 4032)
 182                 return 0xfc;
 183         return (((val + 32) / 64) << 2);
 184 }
 185
 186 /* The 4 most significant bits are not used */
 187 static inline long fan_from_reg(u16 reg)
 188 {
 189         reg &= 0xfff;
 190         if (!reg || reg == 0xfff)
 191                 return 0;
 192         return (1500000 / reg);
 193 }
 194
 195 static inline u16 fan_to_reg(long rpm)
 196 {
 197         /* If the low limit is set below what the chip can measure,
 198            store the largest possible 12-bit value in the registers,
 199            so that no alarm will ever trigger. */
 200         if (rpm < 367)
 201                 return 0xfff;
 202         return (1500000 / rpm);
 203 }
 204
 205 static inline long temp_from_reg(u8 reg)
 206 {
 207         return (reg * 1000);
 208 }
 209
 210 static inline u8 temp_to_reg(long val)
 211 {
 212         if (val < 0)
 213                 val = 0;
 214         else if (val > 1000 * 0xff)
 215                 val = 0xff;
 216         return ((val + 500) / 1000);
 217 }
 218
 219 /*
 220  * Device I/O access
 221  */
 222
 223 static u8 f71805f_read8(struct f71805f_data *data, u8 reg)
 224 {
 225         u8 val;
 226
 227         down(&data->lock);
 228         outb(reg, data->addr + ADDR_REG_OFFSET);
 229         val = inb(data->addr + DATA_REG_OFFSET);
 230         up(&data->lock);
 231
 232         return val;
 233 }
 234
 235 static void f71805f_write8(struct f71805f_data *data, u8 reg, u8 val)
 236 {
 237         down(&data->lock);
 238         outb(reg, data->addr + ADDR_REG_OFFSET);
 239         outb(val, data->addr + DATA_REG_OFFSET);
 240         up(&data->lock);
 241 }
 242
 243 /* It is important to read the MSB first, because doing so latches the
 244    value of the LSB, so we are sure both bytes belong to the same value. */
 245 static u16 f71805f_read16(struct f71805f_data *data, u8 reg)
 246 {
 247         u16 val;
 248
 249         down(&data->lock);
 250         outb(reg, data->addr + ADDR_REG_OFFSET);
 251         val = inb(data->addr + DATA_REG_OFFSET) << 8;
 252         outb(++reg, data->addr + ADDR_REG_OFFSET);
 253         val |= inb(data->addr + DATA_REG_OFFSET);
 254         up(&data->lock);
 255
 256         return val;
 257 }
 258
 259 static void f71805f_write16(struct f71805f_data *data, u8 reg, u16 val)
 260 {
 261         down(&data->lock);
 262         outb(reg, data->addr + ADDR_REG_OFFSET);
 263         outb(val >> 8, data->addr + DATA_REG_OFFSET);
 264         outb(++reg, data->addr + ADDR_REG_OFFSET);
 265         outb(val & 0xff, data->addr + DATA_REG_OFFSET);
 266         up(&data->lock);
 267 }
 268
 269 static struct f71805f_data *f71805f_update_device(struct device *dev)
 270 {
 271         struct f71805f_data *data = dev_get_drvdata(dev);
 272         int nr;
 273
 274         down(&data->update_lock);
 275
 276         /* Limit registers cache is refreshed after 60 seconds */
 277         if (time_after(jiffies, data->last_updated + 60 * HZ)
 278          || !data->valid) {
 279                 for (nr = 0; nr < 9; nr++) {
 280                         data->in_high[nr] = f71805f_read8(data,
 281                                             F71805F_REG_IN_HIGH(nr));
 282                         data->in_low[nr] = f71805f_read8(data,
 283                                            F71805F_REG_IN_LOW(nr));
 284                 }
 285                 for (nr = 0; nr < 3; nr++) {
 286                         if (data->fan_enabled & (1 << nr))
 287                                 data->fan_low[nr] = f71805f_read16(data,
 288                                                     F71805F_REG_FAN_LOW(nr));
 289                 }
 290                 for (nr = 0; nr < 3; nr++) {
 291                         data->temp_high[nr] = f71805f_read8(data,
 292                                               F71805F_REG_TEMP_HIGH(nr));
 293                         data->temp_hyst[nr] = f71805f_read8(data,
 294                                               F71805F_REG_TEMP_HYST(nr));
 295                 }
 296                 data->temp_mode = f71805f_read8(data, F71805F_REG_TEMP_MODE);
 297
 298                 data->last_limits = jiffies;
 299         }
 300
 301         /* Measurement registers cache is refreshed after 1 second */
 302         if (time_after(jiffies, data->last_updated + HZ)
 303          || !data->valid) {
 304                 for (nr = 0; nr < 9; nr++) {
 305                         data->in[nr] = f71805f_read8(data,
 306                                        F71805F_REG_IN(nr));
 307                 }
 308                 for (nr = 0; nr < 3; nr++) {
 309                         if (data->fan_enabled & (1 << nr))
 310                                 data->fan[nr] = f71805f_read16(data,
 311                                                 F71805F_REG_FAN(nr));
 312                 }
 313                 for (nr = 0; nr < 3; nr++) {
 314                         data->temp[nr] = f71805f_read8(data,
 315                                          F71805F_REG_TEMP(nr));
 316                 }
 317                 for (nr = 0; nr < 3; nr++) {
 318                         data->alarms[nr] = f71805f_read8(data,
 319                                            F71805F_REG_STATUS(nr));
 320                 }
 321
 322                 data->last_updated = jiffies;
 323                 data->valid = 1;
 324         }
 325
 326         up(&data->update_lock);
 327
 328         return data;
 329 }
 330
 331 /*
 332  * Sysfs interface
 333  */
 334
 335 static ssize_t show_in0(struct device *dev, struct device_attribute *devattr,
 336                         char *buf)
 337 {
 338         struct f71805f_data *data = f71805f_update_device(dev);
 339
 340         return sprintf(buf, "%ld\n", in0_from_reg(data->in[0]));
 341 }
 342
 343 static ssize_t show_in0_max(struct device *dev, struct device_attribute
 344                             *devattr, char *buf)
 345 {
 346         struct f71805f_data *data = f71805f_update_device(dev);
 347
 348         return sprintf(buf, "%ld\n", in0_from_reg(data->in_high[0]));
 349 }
 350
 351 static ssize_t show_in0_min(struct device *dev, struct device_attribute
 352                             *devattr, char *buf)
 353 {
 354         struct f71805f_data *data = f71805f_update_device(dev);
 355
 356         return sprintf(buf, "%ld\n", in0_from_reg(data->in_low[0]));
 357 }
 358
 359 static ssize_t set_in0_max(struct device *dev, struct device_attribute
 360                            *devattr, const char *buf, size_t count)
 361 {
 362         struct f71805f_data *data = dev_get_drvdata(dev);
 363         long val = simple_strtol(buf, NULL, 10);
 364
 365         down(&data->update_lock);
 366         data->in_high[0] = in0_to_reg(val);
 367         f71805f_write8(data, F71805F_REG_IN_HIGH(0), data->in_high[0]);
 368         up(&data->update_lock);
 369
 370         return count;
 371 }
 372
 373 static ssize_t set_in0_min(struct device *dev, struct device_attribute
 374                            *devattr, const char *buf, size_t count)
 375 {
 376         struct f71805f_data *data = dev_get_drvdata(dev);
 377         long val = simple_strtol(buf, NULL, 10);
 378
 379         down(&data->update_lock);
 380         data->in_low[0] = in0_to_reg(val);
 381         f71805f_write8(data, F71805F_REG_IN_LOW(0), data->in_low[0]);
 382         up(&data->update_lock);
 383
 384         return count;
 385 }
 386
 387 static DEVICE_ATTR(in0_input, S_IRUGO, show_in0, NULL);
 388 static DEVICE_ATTR(in0_max, S_IRUGO| S_IWUSR, show_in0_max, set_in0_max);
 389 static DEVICE_ATTR(in0_min, S_IRUGO| S_IWUSR, show_in0_min, set_in0_min);
 390
 391 static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
 392                        char *buf)
 393 {
 394         struct f71805f_data *data = f71805f_update_device(dev);
 395         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 396         int nr = attr->index;
 397
 398         return sprintf(buf, "%ld\n", in_from_reg(data->in[nr]));
 399 }
 400
 401 static ssize_t show_in_max(struct device *dev, struct device_attribute
 402                            *devattr, char *buf)
 403 {
 404         struct f71805f_data *data = f71805f_update_device(dev);
 405         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 406         int nr = attr->index;
 407
 408         return sprintf(buf, "%ld\n", in_from_reg(data->in_high[nr]));
 409 }
 410
 411 static ssize_t show_in_min(struct device *dev, struct device_attribute
 412                            *devattr, char *buf)
 413 {
 414         struct f71805f_data *data = f71805f_update_device(dev);
 415         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 416         int nr = attr->index;
 417
 418         return sprintf(buf, "%ld\n", in_from_reg(data->in_low[nr]));
 419 }
 420
 421 static ssize_t set_in_max(struct device *dev, struct device_attribute
 422                           *devattr, const char *buf, size_t count)
 423 {
 424         struct f71805f_data *data = dev_get_drvdata(dev);
 425         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 426         int nr = attr->index;
 427         long val = simple_strtol(buf, NULL, 10);
 428
 429         down(&data->update_lock);
 430         data->in_high[nr] = in_to_reg(val);
 431         f71805f_write8(data, F71805F_REG_IN_HIGH(nr), data->in_high[nr]);
 432         up(&data->update_lock);
 433
 434         return count;
 435 }
 436
 437 static ssize_t set_in_min(struct device *dev, struct device_attribute
 438                           *devattr, const char *buf, size_t count)
 439 {
 440         struct f71805f_data *data = dev_get_drvdata(dev);
 441         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 442         int nr = attr->index;
 443         long val = simple_strtol(buf, NULL, 10);
 444
 445         down(&data->update_lock);
 446         data->in_low[nr] = in_to_reg(val);
 447         f71805f_write8(data, F71805F_REG_IN_LOW(nr), data->in_low[nr]);
 448         up(&data->update_lock);
 449
 450         return count;
 451 }
 452
 453 #define sysfs_in(offset)                                        \
 454 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,          \
 455                 show_in, NULL, offset);                         \
 456 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,  \
 457                 show_in_max, set_in_max, offset);               \
 458 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,  \
 459                 show_in_min, set_in_min, offset)
 460
 461 sysfs_in(1);
 462 sysfs_in(2);
 463 sysfs_in(3);
 464 sysfs_in(4);
 465 sysfs_in(5);
 466 sysfs_in(6);
 467 sysfs_in(7);
 468 sysfs_in(8);
 469
 470 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
 471                         char *buf)
 472 {
 473         struct f71805f_data *data = f71805f_update_device(dev);
 474         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 475         int nr = attr->index;
 476
 477         return sprintf(buf, "%ld\n", fan_from_reg(data->fan[nr]));
 478 }
 479
 480 static ssize_t show_fan_min(struct device *dev, struct device_attribute
 481                             *devattr, char *buf)
 482 {
 483         struct f71805f_data *data = f71805f_update_device(dev);
 484         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 485         int nr = attr->index;
 486
 487         return sprintf(buf, "%ld\n", fan_from_reg(data->fan_low[nr]));
 488 }
 489
 490 static ssize_t set_fan_min(struct device *dev, struct device_attribute
 491                            *devattr, const char *buf, size_t count)
 492 {
 493         struct f71805f_data *data = dev_get_drvdata(dev);
 494         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 495         int nr = attr->index;
 496         long val = simple_strtol(buf, NULL, 10);
 497
 498         down(&data->update_lock);
 499         data->fan_low[nr] = fan_to_reg(val);
 500         f71805f_write16(data, F71805F_REG_FAN_LOW(nr), data->fan_low[nr]);
 501         up(&data->update_lock);
 502
 503         return count;
 504 }
 505
 506 #define sysfs_fan(offset)                                       \
 507 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,         \
 508                 show_fan, NULL, offset - 1);                    \
 509 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
 510                 show_fan_min, set_fan_min, offset - 1)
 511
 512 sysfs_fan(1);
 513 sysfs_fan(2);
 514 sysfs_fan(3);
 515
 516 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
 517                          char *buf)
 518 {
 519         struct f71805f_data *data = f71805f_update_device(dev);
 520         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 521         int nr = attr->index;
 522
 523         return sprintf(buf, "%ld\n", temp_from_reg(data->temp[nr]));
 524 }
 525
 526 static ssize_t show_temp_max(struct device *dev, struct device_attribute
 527                              *devattr, char *buf)
 528 {
 529         struct f71805f_data *data = f71805f_update_device(dev);
 530         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 531         int nr = attr->index;
 532
 533         return sprintf(buf, "%ld\n", temp_from_reg(data->temp_high[nr]));
 534 }
 535
 536 static ssize_t show_temp_hyst(struct device *dev, struct device_attribute
 537                               *devattr, char *buf)
 538 {
 539         struct f71805f_data *data = f71805f_update_device(dev);
 540         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 541         int nr = attr->index;
 542
 543         return sprintf(buf, "%ld\n", temp_from_reg(data->temp_hyst[nr]));
 544 }
 545
 546 static ssize_t show_temp_type(struct device *dev, struct device_attribute
 547                               *devattr, char *buf)
 548 {
 549         struct f71805f_data *data = f71805f_update_device(dev);
 550         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 551         int nr = attr->index;
 552
 553         /* 3 is diode, 4 is thermistor */
 554         return sprintf(buf, "%u\n", (data->temp_mode & (1 << nr)) ? 3 : 4);
 555 }
 556
 557 static ssize_t set_temp_max(struct device *dev, struct device_attribute
 558                             *devattr, const char *buf, size_t count)
 559 {
 560         struct f71805f_data *data = dev_get_drvdata(dev);
 561         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 562         int nr = attr->index;
 563         long val = simple_strtol(buf, NULL, 10);
 564
 565         down(&data->update_lock);
 566         data->temp_high[nr] = temp_to_reg(val);
 567         f71805f_write8(data, F71805F_REG_TEMP_HIGH(nr), data->temp_high[nr]);
 568         up(&data->update_lock);
 569
 570         return count;
 571 }
 572
 573 static ssize_t set_temp_hyst(struct device *dev, struct device_attribute
 574                              *devattr, const char *buf, size_t count)
 575 {
 576         struct f71805f_data *data = dev_get_drvdata(dev);
 577         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 578         int nr = attr->index;
 579         long val = simple_strtol(buf, NULL, 10);
 580
 581         down(&data->update_lock);
 582         data->temp_hyst[nr] = temp_to_reg(val);
 583         f71805f_write8(data, F71805F_REG_TEMP_HYST(nr), data->temp_hyst[nr]);
 584         up(&data->update_lock);
 585
 586         return count;
 587 }
 588
 589 #define sysfs_temp(offset)                                              \
 590 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO,                \
 591                 show_temp, NULL, offset - 1);                           \
 592 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,        \
 593                 show_temp_max, set_temp_max, offset - 1);               \
 594 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR,   \
 595                 show_temp_hyst, set_temp_hyst, offset - 1);             \
 596 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO,                 \
 597                 show_temp_type, NULL, offset - 1)
 598
 599 sysfs_temp(1);
 600 sysfs_temp(2);
 601 sysfs_temp(3);
 602
 603 static ssize_t show_alarms_in(struct device *dev, struct device_attribute
 604                               *devattr, char *buf)
 605 {
 606         struct f71805f_data *data = f71805f_update_device(dev);
 607
 608         return sprintf(buf, "%d\n", data->alarms[0] |
 609                                     ((data->alarms[1] & 0x01) << 8));
 610 }
 611
 612 static ssize_t show_alarms_fan(struct device *dev, struct device_attribute
 613                                *devattr, char *buf)
 614 {
 615         struct f71805f_data *data = f71805f_update_device(dev);
 616
 617         return sprintf(buf, "%d\n", data->alarms[2] & 0x07);
 618 }
 619
 620 static ssize_t show_alarms_temp(struct device *dev, struct device_attribute
 621                                 *devattr, char *buf)
 622 {
 623         struct f71805f_data *data = f71805f_update_device(dev);
 624
 625         return sprintf(buf, "%d\n", (data->alarms[1] >> 3) & 0x07);
 626 }
 627
 628 static DEVICE_ATTR(alarms_in, S_IRUGO, show_alarms_in, NULL);
 629 static DEVICE_ATTR(alarms_fan, S_IRUGO, show_alarms_fan, NULL);
 630 static DEVICE_ATTR(alarms_temp, S_IRUGO, show_alarms_temp, NULL);
 631
 632 static ssize_t show_name(struct device *dev, struct device_attribute
 633                          *devattr, char *buf)
 634 {
 635         struct f71805f_data *data = dev_get_drvdata(dev);
 636
 637         return sprintf(buf, "%s\n", data->name);
 638 }
 639
 640 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
 641
 642 /*
 643  * Device registration and initialization
 644  */
 645
 646 static void __devinit f71805f_init_device(struct f71805f_data *data)
 647 {
 648         u8 reg;
 649         int i;
 650
 651         reg = f71805f_read8(data, F71805F_REG_START);
 652         if ((reg & 0x41) != 0x01) {
 653                 printk(KERN_DEBUG DRVNAME ": Starting monitoring "
 654                        "operations\n");
 655                 f71805f_write8(data, F71805F_REG_START, (reg | 0x01) & ~0x40);
 656         }
 657
 658         /* Fan monitoring can be disabled. If it is, we won't be polling
 659            the register values, and won't create the related sysfs files. */
 660         for (i = 0; i < 3; i++) {
 661                 reg = f71805f_read8(data, F71805F_REG_FAN_CTRL(i));
 662                 if (!(reg & 0x80))
 663                         data->fan_enabled |= (1 << i);
 664         }
 665 }
 666
 667 static int __devinit f71805f_probe(struct platform_device *pdev)
 668 {
 669         struct f71805f_data *data;
 670         struct resource *res;
 671         int err;
 672
 673         if (!(data = kzalloc(sizeof(struct f71805f_data), GFP_KERNEL))) {
 674                 err = -ENOMEM;
 675                 printk(KERN_ERR DRVNAME ": Out of memory\n");
 676                 goto exit;
 677         }
 678
 679         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
 680         data->addr = res->start;
 681         init_MUTEX(&data->lock);
 682         data->name = "f71805f";
 683         init_MUTEX(&data->update_lock);
 684
 685         platform_set_drvdata(pdev, data);
 686
 687         data->class_dev = hwmon_device_register(&pdev->dev);
 688         if (IS_ERR(data->class_dev)) {
 689                 err = PTR_ERR(data->class_dev);
 690                 dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
 691                 goto exit_free;
 692         }
 693
 694         /* Initialize the F71805F chip */
 695         f71805f_init_device(data);
 696
 697         /* Register sysfs interface files */
 698         device_create_file(&pdev->dev, &dev_attr_in0_input);
 699         device_create_file(&pdev->dev, &dev_attr_in0_max);
 700         device_create_file(&pdev->dev, &dev_attr_in0_min);
 701         device_create_file(&pdev->dev, &sensor_dev_attr_in1_input.dev_attr);
 702         device_create_file(&pdev->dev, &sensor_dev_attr_in2_input.dev_attr);
 703         device_create_file(&pdev->dev, &sensor_dev_attr_in3_input.dev_attr);
 704         device_create_file(&pdev->dev, &sensor_dev_attr_in4_input.dev_attr);
 705         device_create_file(&pdev->dev, &sensor_dev_attr_in5_input.dev_attr);
 706         device_create_file(&pdev->dev, &sensor_dev_attr_in6_input.dev_attr);
 707         device_create_file(&pdev->dev, &sensor_dev_attr_in7_input.dev_attr);
 708         device_create_file(&pdev->dev, &sensor_dev_attr_in8_input.dev_attr);
 709         device_create_file(&pdev->dev, &sensor_dev_attr_in1_max.dev_attr);
 710         device_create_file(&pdev->dev, &sensor_dev_attr_in2_max.dev_attr);
 711         device_create_file(&pdev->dev, &sensor_dev_attr_in3_max.dev_attr);
 712         device_create_file(&pdev->dev, &sensor_dev_attr_in4_max.dev_attr);
 713         device_create_file(&pdev->dev, &sensor_dev_attr_in5_max.dev_attr);
 714         device_create_file(&pdev->dev, &sensor_dev_attr_in6_max.dev_attr);
 715         device_create_file(&pdev->dev, &sensor_dev_attr_in7_max.dev_attr);
 716         device_create_file(&pdev->dev, &sensor_dev_attr_in8_max.dev_attr);
 717         device_create_file(&pdev->dev, &sensor_dev_attr_in1_min.dev_attr);
 718         device_create_file(&pdev->dev, &sensor_dev_attr_in2_min.dev_attr);
 719         device_create_file(&pdev->dev, &sensor_dev_attr_in3_min.dev_attr);
 720         device_create_file(&pdev->dev, &sensor_dev_attr_in4_min.dev_attr);
 721         device_create_file(&pdev->dev, &sensor_dev_attr_in5_min.dev_attr);
 722         device_create_file(&pdev->dev, &sensor_dev_attr_in6_min.dev_attr);
 723         device_create_file(&pdev->dev, &sensor_dev_attr_in7_min.dev_attr);
 724         device_create_file(&pdev->dev, &sensor_dev_attr_in8_min.dev_attr);
 725         if (data->fan_enabled & (1 << 0)) {
 726                 device_create_file(&pdev->dev,
 727                                    &sensor_dev_attr_fan1_input.dev_attr);
 728                 device_create_file(&pdev->dev,
 729                                    &sensor_dev_attr_fan1_min.dev_attr);
 730         }
 731         if (data->fan_enabled & (1 << 1)) {
 732                 device_create_file(&pdev->dev,
 733                                    &sensor_dev_attr_fan2_input.dev_attr);
 734                 device_create_file(&pdev->dev,
 735                                    &sensor_dev_attr_fan2_min.dev_attr);
 736         }
 737         if (data->fan_enabled & (1 << 2)) {
 738                 device_create_file(&pdev->dev,
 739                                    &sensor_dev_attr_fan3_input.dev_attr);
 740                 device_create_file(&pdev->dev,
 741                                    &sensor_dev_attr_fan3_min.dev_attr);
 742         }
 743         device_create_file(&pdev->dev,
 744                            &sensor_dev_attr_temp1_input.dev_attr);
 745         device_create_file(&pdev->dev,
 746                            &sensor_dev_attr_temp2_input.dev_attr);
 747         device_create_file(&pdev->dev,
 748                            &sensor_dev_attr_temp3_input.dev_attr);
 749         device_create_file(&pdev->dev, &sensor_dev_attr_temp1_max.dev_attr);
 750         device_create_file(&pdev->dev, &sensor_dev_attr_temp2_max.dev_attr);
 751         device_create_file(&pdev->dev, &sensor_dev_attr_temp3_max.dev_attr);
 752         device_create_file(&pdev->dev,
 753                            &sensor_dev_attr_temp1_max_hyst.dev_attr);
 754         device_create_file(&pdev->dev,
 755                            &sensor_dev_attr_temp2_max_hyst.dev_attr);
 756         device_create_file(&pdev->dev,
 757                            &sensor_dev_attr_temp3_max_hyst.dev_attr);
 758         device_create_file(&pdev->dev, &sensor_dev_attr_temp1_type.dev_attr);
 759         device_create_file(&pdev->dev, &sensor_dev_attr_temp2_type.dev_attr);
 760         device_create_file(&pdev->dev, &sensor_dev_attr_temp3_type.dev_attr);
 761         device_create_file(&pdev->dev, &dev_attr_alarms_in);
 762         device_create_file(&pdev->dev, &dev_attr_alarms_fan);
 763         device_create_file(&pdev->dev, &dev_attr_alarms_temp);
 764         device_create_file(&pdev->dev, &dev_attr_name);
 765
 766         return 0;
 767
 768 exit_free:
 769         kfree(data);
 770 exit:
 771         return err;
 772 }
 773
 774 static int __devexit f71805f_remove(struct platform_device *pdev)
 775 {
 776         struct f71805f_data *data = platform_get_drvdata(pdev);
 777
 778         platform_set_drvdata(pdev, NULL);
 779         hwmon_device_unregister(data->class_dev);
 780         kfree(data);
 781
 782         return 0;
 783 }
 784
 785 static struct platform_driver f71805f_driver = {
 786         .driver = {
 787                 .owner  = THIS_MODULE,
 788                 .name   = DRVNAME,
 789         },
 790         .probe          = f71805f_probe,
 791         .remove         = __devexit_p(f71805f_remove),
 792 };
 793
 794 static int __init f71805f_device_add(unsigned short address)
 795 {
 796         int err;
 797
 798         pdev = platform_device_alloc(DRVNAME, address);
 799         if (!pdev) {
 800                 err = -ENOMEM;
 801                 printk(KERN_ERR DRVNAME ": Device allocation failed\n");
 802                 goto exit;
 803         }
 804
 805         f71805f_resource.start = address;
 806         f71805f_resource.end = address + REGION_LENGTH - 1;
 807         f71805f_resource.name = pdev->name;
 808         err = platform_device_add_resources(pdev, &f71805f_resource, 1);
 809         if (err) {
 810                 printk(KERN_ERR DRVNAME ": Device resource addition failed "
 811                        "(%d)\n", err);
 812                 goto exit_device_put;
 813         }
 814
 815         err = platform_device_add(pdev);
 816         if (err) {
 817                 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
 818                        err);
 819                 goto exit_device_put;
 820         }
 821
 822         return 0;
 823
 824 exit_device_put:
 825         platform_device_put(pdev);
 826 exit:
 827         return err;
 828 }
 829
 830 static int __init f71805f_find(int sioaddr, unsigned short *address)
 831 {
 832         int err = -ENODEV;
 833         u16 devid;
 834
 835         superio_enter(sioaddr);
 836
 837         devid = superio_inw(sioaddr, SIO_REG_MANID);
 838         if (devid != SIO_FINTEK_ID)
 839                 goto exit;
 840
 841         devid = superio_inw(sioaddr, SIO_REG_DEVID);
 842         if (devid != SIO_F71805F_ID) {
 843                 printk(KERN_INFO DRVNAME ": Unsupported Fintek device, "
 844                        "skipping\n");
 845                 goto exit;
 846         }
 847
 848         superio_select(sioaddr, F71805F_LD_HWM);
 849         if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) {
 850                 printk(KERN_WARNING DRVNAME ": Device not activated, "
 851                        "skipping\n");
 852                 goto exit;
 853         }
 854
 855         *address = superio_inw(sioaddr, SIO_REG_ADDR);
 856         if (*address == 0) {
 857                 printk(KERN_WARNING DRVNAME ": Base address not set, "
 858                        "skipping\n");
 859                 goto exit;
 860         }
 861
 862         err = 0;
 863         printk(KERN_INFO DRVNAME ": Found F71805F chip at %#x, revision %u\n",
 864                *address, superio_inb(sioaddr, SIO_REG_DEVREV));
 865
 866 exit:
 867         superio_exit(sioaddr);
 868         return err;
 869 }
 870
 871 static int __init f71805f_init(void)
 872 {
 873         int err;
 874         unsigned short address;
 875
 876         if (f71805f_find(0x2e, &address)
 877          && f71805f_find(0x4e, &address))
 878                 return -ENODEV;
 879
 880         err = platform_driver_register(&f71805f_driver);
 881         if (err)
 882                 goto exit;
 883
 884         /* Sets global pdev as a side effect */
 885         err = f71805f_device_add(address);
 886         if (err)
 887                 goto exit_driver;
 888
 889         return 0;
 890
 891 exit_driver:
 892         platform_driver_unregister(&f71805f_driver);
 893 exit:
 894         return err;
 895 }
 896
 897 static void __exit f71805f_exit(void)
 898 {
 899         platform_device_unregister(pdev);
 900         platform_driver_unregister(&f71805f_driver);
 901 }
 902
 903 MODULE_AUTHOR("Jean Delvare <khali@linux-fr>");
 904 MODULE_LICENSE("GPL");
 905 MODULE_DESCRIPTION("F71805F hardware monitoring driver");
 906
 907 module_init(f71805f_init);
 908 module_exit(f71805f_exit);