drivers/hwmon/it87.c

   1 /*
   2  *  it87.c - Part of lm_sensors, Linux kernel modules for hardware
   3  *           monitoring.
   4  *
   5  *  The IT8705F is an LPC-based Super I/O part that contains UARTs, a
   6  *  parallel port, an IR port, a MIDI port, a floppy controller, etc., in
   7  *  addition to an Environment Controller (Enhanced Hardware Monitor and
   8  *  Fan Controller)
   9  *
  10  *  This driver supports only the Environment Controller in the IT8705F and
  11  *  similar parts.  The other devices are supported by different drivers.
  12  *
  13  *  Supports: IT8705F  Super I/O chip w/LPC interface
  14  *            IT8712F  Super I/O chip w/LPC interface
  15  *            IT8716F  Super I/O chip w/LPC interface
  16  *            IT8718F  Super I/O chip w/LPC interface
  17  *            IT8720F  Super I/O chip w/LPC interface
  18  *            IT8726F  Super I/O chip w/LPC interface
  19  *            Sis950   A clone of the IT8705F
  20  *
  21  *  Copyright (C) 2001 Chris Gauthron
  22  *  Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org>
  23  *
  24  *  This program is free software; you can redistribute it and/or modify
  25  *  it under the terms of the GNU General Public License as published by
  26  *  the Free Software Foundation; either version 2 of the License, or
  27  *  (at your option) any later version.
  28  *
  29  *  This program is distributed in the hope that it will be useful,
  30  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  31  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  32  *  GNU General Public License for more details.
  33  *
  34  *  You should have received a copy of the GNU General Public License
  35  *  along with this program; if not, write to the Free Software
  36  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  37  */
  38
  39 #include <linux/module.h>
  40 #include <linux/init.h>
  41 #include <linux/slab.h>
  42 #include <linux/jiffies.h>
  43 #include <linux/platform_device.h>
  44 #include <linux/hwmon.h>
  45 #include <linux/hwmon-sysfs.h>
  46 #include <linux/hwmon-vid.h>
  47 #include <linux/err.h>
  48 #include <linux/mutex.h>
  49 #include <linux/sysfs.h>
  50 #include <linux/string.h>
  51 #include <linux/dmi.h>
  52 #include <linux/acpi.h>
  53 #include <linux/io.h>
  54
  55 #define DRVNAME "it87"
  56
  57 enum chips { it87, it8712, it8716, it8718, it8720 };
  58
  59 static unsigned short force_id;
  60 module_param(force_id, ushort, 0);
  61 MODULE_PARM_DESC(force_id, "Override the detected device ID");
  62
  63 static struct platform_device *pdev;
  64
  65 #define REG     0x2e    /* The register to read/write */
  66 #define DEV     0x07    /* Register: Logical device select */
  67 #define VAL     0x2f    /* The value to read/write */
  68 #define PME     0x04    /* The device with the fan registers in it */
  69
  70 /* The device with the IT8718F/IT8720F VID value in it */
  71 #define GPIO    0x07
  72
  73 #define DEVID   0x20    /* Register: Device ID */
  74 #define DEVREV  0x22    /* Register: Device Revision */
  75
  76 static inline int
  77 superio_inb(int reg)
  78 {
  79         outb(reg, REG);
  80         return inb(VAL);
  81 }
  82
  83 static int superio_inw(int reg)
  84 {
  85         int val;
  86         outb(reg++, REG);
  87         val = inb(VAL) << 8;
  88         outb(reg, REG);
  89         val |= inb(VAL);
  90         return val;
  91 }
  92
  93 static inline void
  94 superio_select(int ldn)
  95 {
  96         outb(DEV, REG);
  97         outb(ldn, VAL);
  98 }
  99
 100 static inline void
 101 superio_enter(void)
 102 {
 103         outb(0x87, REG);
 104         outb(0x01, REG);
 105         outb(0x55, REG);
 106         outb(0x55, REG);
 107 }
 108
 109 static inline void
 110 superio_exit(void)
 111 {
 112         outb(0x02, REG);
 113         outb(0x02, VAL);
 114 }
 115
 116 /* Logical device 4 registers */
 117 #define IT8712F_DEVID 0x8712
 118 #define IT8705F_DEVID 0x8705
 119 #define IT8716F_DEVID 0x8716
 120 #define IT8718F_DEVID 0x8718
 121 #define IT8720F_DEVID 0x8720
 122 #define IT8726F_DEVID 0x8726
 123 #define IT87_ACT_REG  0x30
 124 #define IT87_BASE_REG 0x60
 125
 126 /* Logical device 7 registers (IT8712F and later) */
 127 #define IT87_SIO_GPIO3_REG      0x27
 128 #define IT87_SIO_GPIO5_REG      0x29
 129 #define IT87_SIO_PINX2_REG      0x2c    /* Pin selection */
 130 #define IT87_SIO_VID_REG        0xfc    /* VID value */
 131 #define IT87_SIO_BEEP_PIN_REG   0xf6    /* Beep pin mapping */
 132
 133 /* Update battery voltage after every reading if true */
 134 static int update_vbat;
 135
 136 /* Not all BIOSes properly configure the PWM registers */
 137 static int fix_pwm_polarity;
 138
 139 /* Many IT87 constants specified below */
 140
 141 /* Length of ISA address segment */
 142 #define IT87_EXTENT 8
 143
 144 /* Length of ISA address segment for Environmental Controller */
 145 #define IT87_EC_EXTENT 2
 146
 147 /* Offset of EC registers from ISA base address */
 148 #define IT87_EC_OFFSET 5
 149
 150 /* Where are the ISA address/data registers relative to the EC base address */
 151 #define IT87_ADDR_REG_OFFSET 0
 152 #define IT87_DATA_REG_OFFSET 1
 153
 154 /*----- The IT87 registers -----*/
 155
 156 #define IT87_REG_CONFIG        0x00
 157
 158 #define IT87_REG_ALARM1        0x01
 159 #define IT87_REG_ALARM2        0x02
 160 #define IT87_REG_ALARM3        0x03
 161
 162 /* The IT8718F and IT8720F have the VID value in a different register, in
 163    Super-I/O configuration space. */
 164 #define IT87_REG_VID           0x0a
 165 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
 166    for fan divisors. Later IT8712F revisions must use 16-bit tachometer
 167    mode. */
 168 #define IT87_REG_FAN_DIV       0x0b
 169 #define IT87_REG_FAN_16BIT     0x0c
 170
 171 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
 172
 173 static const u8 IT87_REG_FAN[]          = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
 174 static const u8 IT87_REG_FAN_MIN[]      = { 0x10, 0x11, 0x12, 0x84, 0x86 };
 175 static const u8 IT87_REG_FANX[]         = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
 176 static const u8 IT87_REG_FANX_MIN[]     = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
 177 #define IT87_REG_FAN_MAIN_CTRL 0x13
 178 #define IT87_REG_FAN_CTL       0x14
 179 #define IT87_REG_PWM(nr)       (0x15 + (nr))
 180
 181 #define IT87_REG_VIN(nr)       (0x20 + (nr))
 182 #define IT87_REG_TEMP(nr)      (0x29 + (nr))
 183
 184 #define IT87_REG_VIN_MAX(nr)   (0x30 + (nr) * 2)
 185 #define IT87_REG_VIN_MIN(nr)   (0x31 + (nr) * 2)
 186 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
 187 #define IT87_REG_TEMP_LOW(nr)  (0x41 + (nr) * 2)
 188
 189 #define IT87_REG_VIN_ENABLE    0x50
 190 #define IT87_REG_TEMP_ENABLE   0x51
 191 #define IT87_REG_BEEP_ENABLE   0x5c
 192
 193 #define IT87_REG_CHIPID        0x58
 194
 195 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
 196 #define IT87_REG_AUTO_PWM(nr, i)  (0x65 + (nr) * 8 + (i))
 197
 198 #define IN_TO_REG(val)  (SENSORS_LIMIT((((val) + 8)/16),0,255))
 199 #define IN_FROM_REG(val) ((val) * 16)
 200
 201 static inline u8 FAN_TO_REG(long rpm, int div)
 202 {
 203         if (rpm == 0)
 204                 return 255;
 205         rpm = SENSORS_LIMIT(rpm, 1, 1000000);
 206         return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
 207                              254);
 208 }
 209
 210 static inline u16 FAN16_TO_REG(long rpm)
 211 {
 212         if (rpm == 0)
 213                 return 0xffff;
 214         return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
 215 }
 216
 217 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))
 218 /* The divider is fixed to 2 in 16-bit mode */
 219 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2))
 220
 221 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\
 222                                         ((val)+500)/1000),-128,127))
 223 #define TEMP_FROM_REG(val) ((val) * 1000)
 224
 225 #define PWM_TO_REG(val)   ((val) >> 1)
 226 #define PWM_FROM_REG(val) (((val)&0x7f) << 1)
 227
 228 static int DIV_TO_REG(int val)
 229 {
 230         int answer = 0;
 231         while (answer < 7 && (val >>= 1))
 232                 answer++;
 233         return answer;
 234 }
 235 #define DIV_FROM_REG(val) (1 << (val))
 236
 237 static const unsigned int pwm_freq[8] = {
 238         48000000 / 128,
 239         24000000 / 128,
 240         12000000 / 128,
 241         8000000 / 128,
 242         6000000 / 128,
 243         3000000 / 128,
 244         1500000 / 128,
 245         750000 / 128,
 246 };
 247
 248
 249 struct it87_sio_data {
 250         enum chips type;
 251         /* Values read from Super-I/O config space */
 252         u8 revision;
 253         u8 vid_value;
 254         u8 beep_pin;
 255         /* Features skipped based on config or DMI */
 256         u8 skip_vid;
 257         u8 skip_fan;
 258         u8 skip_pwm;
 259 };
 260
 261 /* For each registered chip, we need to keep some data in memory.
 262    The structure is dynamically allocated. */
 263 struct it87_data {
 264         struct device *hwmon_dev;
 265         enum chips type;
 266         u8 revision;
 267
 268         unsigned short addr;
 269         const char *name;
 270         struct mutex update_lock;
 271         char valid;             /* !=0 if following fields are valid */
 272         unsigned long last_updated;     /* In jiffies */
 273
 274         u8 in[9];               /* Register value */
 275         u8 in_max[8];           /* Register value */
 276         u8 in_min[8];           /* Register value */
 277         u8 has_fan;             /* Bitfield, fans enabled */
 278         u16 fan[5];             /* Register values, possibly combined */
 279         u16 fan_min[5];         /* Register values, possibly combined */
 280         s8 temp[3];             /* Register value */
 281         s8 temp_high[3];        /* Register value */
 282         s8 temp_low[3];         /* Register value */
 283         u8 sensor;              /* Register value */
 284         u8 fan_div[3];          /* Register encoding, shifted right */
 285         u8 vid;                 /* Register encoding, combined */
 286         u8 vrm;
 287         u32 alarms;             /* Register encoding, combined */
 288         u8 beeps;               /* Register encoding */
 289         u8 fan_main_ctrl;       /* Register value */
 290         u8 fan_ctl;             /* Register value */
 291
 292         /* The following 3 arrays correspond to the same registers. The
 293          * meaning of bits 6-0 depends on the value of bit 7, and we want
 294          * to preserve settings on mode changes, so we have to track all
 295          * values separately. */
 296         u8 pwm_ctrl[3];         /* Register value */
 297         u8 pwm_duty[3];         /* Manual PWM value set by user (bit 6-0) */
 298         u8 pwm_temp_map[3];     /* PWM to temp. chan. mapping (bits 1-0) */
 299
 300         /* Automatic fan speed control registers */
 301         u8 auto_pwm[3][4];      /* [nr][3] is hard-coded */
 302         s8 auto_temp[3][5];     /* [nr][0] is point1_temp_hyst */
 303 };
 304
 305 static inline int has_16bit_fans(const struct it87_data *data)
 306 {
 307         /* IT8705F Datasheet 0.4.1, 3h == Version G.
 308            IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
 309            These are the first revisions with 16bit tachometer support. */
 310         return (data->type == it87 && data->revision >= 0x03)
 311             || (data->type == it8712 && data->revision >= 0x08)
 312             || data->type == it8716
 313             || data->type == it8718
 314             || data->type == it8720;
 315 }
 316
 317 static inline int has_old_autopwm(const struct it87_data *data)
 318 {
 319         /* The old automatic fan speed control interface is implemented
 320            by IT8705F chips up to revision F and IT8712F chips up to
 321            revision G. */
 322         return (data->type == it87 && data->revision < 0x03)
 323             || (data->type == it8712 && data->revision < 0x08);
 324 }
 325
 326 static int it87_probe(struct platform_device *pdev);
 327 static int __devexit it87_remove(struct platform_device *pdev);
 328
 329 static int it87_read_value(struct it87_data *data, u8 reg);
 330 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
 331 static struct it87_data *it87_update_device(struct device *dev);
 332 static int it87_check_pwm(struct device *dev);
 333 static void it87_init_device(struct platform_device *pdev);
 334
 335
 336 static struct platform_driver it87_driver = {
 337         .driver = {
 338                 .owner  = THIS_MODULE,
 339                 .name   = DRVNAME,
 340         },
 341         .probe  = it87_probe,
 342         .remove = __devexit_p(it87_remove),
 343 };
 344
 345 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 346                 char *buf)
 347 {
 348         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 349         int nr = sensor_attr->index;
 350
 351         struct it87_data *data = it87_update_device(dev);
 352         return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
 353 }
 354
 355 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
 356                 char *buf)
 357 {
 358         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 359         int nr = sensor_attr->index;
 360
 361         struct it87_data *data = it87_update_device(dev);
 362         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
 363 }
 364
 365 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
 366                 char *buf)
 367 {
 368         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 369         int nr = sensor_attr->index;
 370
 371         struct it87_data *data = it87_update_device(dev);
 372         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
 373 }
 374
 375 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 376                 const char *buf, size_t count)
 377 {
 378         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 379         int nr = sensor_attr->index;
 380
 381         struct it87_data *data = dev_get_drvdata(dev);
 382         unsigned long val;
 383
 384         if (strict_strtoul(buf, 10, &val) < 0)
 385                 return -EINVAL;
 386
 387         mutex_lock(&data->update_lock);
 388         data->in_min[nr] = IN_TO_REG(val);
 389         it87_write_value(data, IT87_REG_VIN_MIN(nr),
 390                         data->in_min[nr]);
 391         mutex_unlock(&data->update_lock);
 392         return count;
 393 }
 394 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 395                 const char *buf, size_t count)
 396 {
 397         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 398         int nr = sensor_attr->index;
 399
 400         struct it87_data *data = dev_get_drvdata(dev);
 401         unsigned long val;
 402
 403         if (strict_strtoul(buf, 10, &val) < 0)
 404                 return -EINVAL;
 405
 406         mutex_lock(&data->update_lock);
 407         data->in_max[nr] = IN_TO_REG(val);
 408         it87_write_value(data, IT87_REG_VIN_MAX(nr),
 409                         data->in_max[nr]);
 410         mutex_unlock(&data->update_lock);
 411         return count;
 412 }
 413
 414 #define show_in_offset(offset)                                  \
 415 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,          \
 416                 show_in, NULL, offset);
 417
 418 #define limit_in_offset(offset)                                 \
 419 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,  \
 420                 show_in_min, set_in_min, offset);               \
 421 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,  \
 422                 show_in_max, set_in_max, offset);
 423
 424 show_in_offset(0);
 425 limit_in_offset(0);
 426 show_in_offset(1);
 427 limit_in_offset(1);
 428 show_in_offset(2);
 429 limit_in_offset(2);
 430 show_in_offset(3);
 431 limit_in_offset(3);
 432 show_in_offset(4);
 433 limit_in_offset(4);
 434 show_in_offset(5);
 435 limit_in_offset(5);
 436 show_in_offset(6);
 437 limit_in_offset(6);
 438 show_in_offset(7);
 439 limit_in_offset(7);
 440 show_in_offset(8);
 441
 442 /* 3 temperatures */
 443 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 444                 char *buf)
 445 {
 446         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 447         int nr = sensor_attr->index;
 448
 449         struct it87_data *data = it87_update_device(dev);
 450         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
 451 }
 452 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 453                 char *buf)
 454 {
 455         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 456         int nr = sensor_attr->index;
 457
 458         struct it87_data *data = it87_update_device(dev);
 459         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
 460 }
 461 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
 462                 char *buf)
 463 {
 464         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 465         int nr = sensor_attr->index;
 466
 467         struct it87_data *data = it87_update_device(dev);
 468         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
 469 }
 470 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 471                 const char *buf, size_t count)
 472 {
 473         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 474         int nr = sensor_attr->index;
 475
 476         struct it87_data *data = dev_get_drvdata(dev);
 477         long val;
 478
 479         if (strict_strtol(buf, 10, &val) < 0)
 480                 return -EINVAL;
 481
 482         mutex_lock(&data->update_lock);
 483         data->temp_high[nr] = TEMP_TO_REG(val);
 484         it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
 485         mutex_unlock(&data->update_lock);
 486         return count;
 487 }
 488 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
 489                 const char *buf, size_t count)
 490 {
 491         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 492         int nr = sensor_attr->index;
 493
 494         struct it87_data *data = dev_get_drvdata(dev);
 495         long val;
 496
 497         if (strict_strtol(buf, 10, &val) < 0)
 498                 return -EINVAL;
 499
 500         mutex_lock(&data->update_lock);
 501         data->temp_low[nr] = TEMP_TO_REG(val);
 502         it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
 503         mutex_unlock(&data->update_lock);
 504         return count;
 505 }
 506 #define show_temp_offset(offset)                                        \
 507 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO,                \
 508                 show_temp, NULL, offset - 1);                           \
 509 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,        \
 510                 show_temp_max, set_temp_max, offset - 1);               \
 511 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,        \
 512                 show_temp_min, set_temp_min, offset - 1);
 513
 514 show_temp_offset(1);
 515 show_temp_offset(2);
 516 show_temp_offset(3);
 517
 518 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
 519                 char *buf)
 520 {
 521         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 522         int nr = sensor_attr->index;
 523
 524         struct it87_data *data = it87_update_device(dev);
 525         u8 reg = data->sensor;          /* In case the value is updated while
 526                                            we use it */
 527
 528         if (reg & (1 << nr))
 529                 return sprintf(buf, "3\n");  /* thermal diode */
 530         if (reg & (8 << nr))
 531                 return sprintf(buf, "4\n");  /* thermistor */
 532         return sprintf(buf, "0\n");      /* disabled */
 533 }
 534 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
 535                 const char *buf, size_t count)
 536 {
 537         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 538         int nr = sensor_attr->index;
 539
 540         struct it87_data *data = dev_get_drvdata(dev);
 541         long val;
 542         u8 reg;
 543
 544         if (strict_strtol(buf, 10, &val) < 0)
 545                 return -EINVAL;
 546
 547         reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
 548         reg &= ~(1 << nr);
 549         reg &= ~(8 << nr);
 550         if (val == 2) { /* backwards compatibility */
 551                 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
 552                          "instead\n");
 553                 val = 4;
 554         }
 555         /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
 556         if (val == 3)
 557                 reg |= 1 << nr;
 558         else if (val == 4)
 559                 reg |= 8 << nr;
 560         else if (val != 0)
 561                 return -EINVAL;
 562
 563         mutex_lock(&data->update_lock);
 564         data->sensor = reg;
 565         it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
 566         data->valid = 0;        /* Force cache refresh */
 567         mutex_unlock(&data->update_lock);
 568         return count;
 569 }
 570 #define show_sensor_offset(offset)                                      \
 571 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR,       \
 572                 show_sensor, set_sensor, offset - 1);
 573
 574 show_sensor_offset(1);
 575 show_sensor_offset(2);
 576 show_sensor_offset(3);
 577
 578 /* 3 Fans */
 579
 580 static int pwm_mode(const struct it87_data *data, int nr)
 581 {
 582         int ctrl = data->fan_main_ctrl & (1 << nr);
 583
 584         if (ctrl == 0)                                  /* Full speed */
 585                 return 0;
 586         if (data->pwm_ctrl[nr] & 0x80)                  /* Automatic mode */
 587                 return 2;
 588         else                                            /* Manual mode */
 589                 return 1;
 590 }
 591
 592 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 593                 char *buf)
 594 {
 595         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 596         int nr = sensor_attr->index;
 597
 598         struct it87_data *data = it87_update_device(dev);
 599         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
 600                                 DIV_FROM_REG(data->fan_div[nr])));
 601 }
 602 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
 603                 char *buf)
 604 {
 605         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 606         int nr = sensor_attr->index;
 607
 608         struct it87_data *data = it87_update_device(dev);
 609         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 610                                 DIV_FROM_REG(data->fan_div[nr])));
 611 }
 612 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
 613                 char *buf)
 614 {
 615         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 616         int nr = sensor_attr->index;
 617
 618         struct it87_data *data = it87_update_device(dev);
 619         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 620 }
 621 static ssize_t show_pwm_enable(struct device *dev,
 622                 struct device_attribute *attr, char *buf)
 623 {
 624         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 625         int nr = sensor_attr->index;
 626
 627         struct it87_data *data = it87_update_device(dev);
 628         return sprintf(buf, "%d\n", pwm_mode(data, nr));
 629 }
 630 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 631                 char *buf)
 632 {
 633         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 634         int nr = sensor_attr->index;
 635
 636         struct it87_data *data = it87_update_device(dev);
 637         return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm_duty[nr]));
 638 }
 639 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
 640                 char *buf)
 641 {
 642         struct it87_data *data = it87_update_device(dev);
 643         int index = (data->fan_ctl >> 4) & 0x07;
 644
 645         return sprintf(buf, "%u\n", pwm_freq[index]);
 646 }
 647 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 648                 const char *buf, size_t count)
 649 {
 650         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 651         int nr = sensor_attr->index;
 652
 653         struct it87_data *data = dev_get_drvdata(dev);
 654         long val;
 655         u8 reg;
 656
 657         if (strict_strtol(buf, 10, &val) < 0)
 658                 return -EINVAL;
 659
 660         mutex_lock(&data->update_lock);
 661         reg = it87_read_value(data, IT87_REG_FAN_DIV);
 662         switch (nr) {
 663         case 0:
 664                 data->fan_div[nr] = reg & 0x07;
 665                 break;
 666         case 1:
 667                 data->fan_div[nr] = (reg >> 3) & 0x07;
 668                 break;
 669         case 2:
 670                 data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
 671                 break;
 672         }
 673
 674         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 675         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
 676         mutex_unlock(&data->update_lock);
 677         return count;
 678 }
 679 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 680                 const char *buf, size_t count)
 681 {
 682         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 683         int nr = sensor_attr->index;
 684
 685         struct it87_data *data = dev_get_drvdata(dev);
 686         unsigned long val;
 687         int min;
 688         u8 old;
 689
 690         if (strict_strtoul(buf, 10, &val) < 0)
 691                 return -EINVAL;
 692
 693         mutex_lock(&data->update_lock);
 694         old = it87_read_value(data, IT87_REG_FAN_DIV);
 695
 696         /* Save fan min limit */
 697         min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
 698
 699         switch (nr) {
 700         case 0:
 701         case 1:
 702                 data->fan_div[nr] = DIV_TO_REG(val);
 703                 break;
 704         case 2:
 705                 if (val < 8)
 706                         data->fan_div[nr] = 1;
 707                 else
 708                         data->fan_div[nr] = 3;
 709         }
 710         val = old & 0x80;
 711         val |= (data->fan_div[0] & 0x07);
 712         val |= (data->fan_div[1] & 0x07) << 3;
 713         if (data->fan_div[2] == 3)
 714                 val |= 0x1 << 6;
 715         it87_write_value(data, IT87_REG_FAN_DIV, val);
 716
 717         /* Restore fan min limit */
 718         data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 719         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
 720
 721         mutex_unlock(&data->update_lock);
 722         return count;
 723 }
 724
 725 /* Returns 0 if OK, -EINVAL otherwise */
 726 static int check_trip_points(struct device *dev, int nr)
 727 {
 728         const struct it87_data *data = dev_get_drvdata(dev);
 729         int i, err = 0;
 730
 731         if (has_old_autopwm(data)) {
 732                 for (i = 0; i < 3; i++) {
 733                         if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
 734                                 err = -EINVAL;
 735                 }
 736                 for (i = 0; i < 2; i++) {
 737                         if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
 738                                 err = -EINVAL;
 739                 }
 740         }
 741
 742         if (err) {
 743                 dev_err(dev, "Inconsistent trip points, not switching to "
 744                         "automatic mode\n");
 745                 dev_err(dev, "Adjust the trip points and try again\n");
 746         }
 747         return err;
 748 }
 749
 750 static ssize_t set_pwm_enable(struct device *dev,
 751                 struct device_attribute *attr, const char *buf, size_t count)
 752 {
 753         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 754         int nr = sensor_attr->index;
 755
 756         struct it87_data *data = dev_get_drvdata(dev);
 757         long val;
 758
 759         if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2)
 760                 return -EINVAL;
 761
 762         /* Check trip points before switching to automatic mode */
 763         if (val == 2) {
 764                 if (check_trip_points(dev, nr) < 0)
 765                         return -EINVAL;
 766         }
 767
 768         mutex_lock(&data->update_lock);
 769
 770         if (val == 0) {
 771                 int tmp;
 772                 /* make sure the fan is on when in on/off mode */
 773                 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
 774                 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
 775                 /* set on/off mode */
 776                 data->fan_main_ctrl &= ~(1 << nr);
 777                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
 778                                  data->fan_main_ctrl);
 779         } else {
 780                 if (val == 1)                           /* Manual mode */
 781                         data->pwm_ctrl[nr] = data->pwm_duty[nr];
 782                 else                                    /* Automatic mode */
 783                         data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
 784                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
 785                 /* set SmartGuardian mode */
 786                 data->fan_main_ctrl |= (1 << nr);
 787                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
 788                                  data->fan_main_ctrl);
 789         }
 790
 791         mutex_unlock(&data->update_lock);
 792         return count;
 793 }
 794 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 795                 const char *buf, size_t count)
 796 {
 797         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 798         int nr = sensor_attr->index;
 799
 800         struct it87_data *data = dev_get_drvdata(dev);
 801         long val;
 802
 803         if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
 804                 return -EINVAL;
 805
 806         mutex_lock(&data->update_lock);
 807         data->pwm_duty[nr] = PWM_TO_REG(val);
 808         /* If we are in manual mode, write the duty cycle immediately;
 809          * otherwise, just store it for later use. */
 810         if (!(data->pwm_ctrl[nr] & 0x80)) {
 811                 data->pwm_ctrl[nr] = data->pwm_duty[nr];
 812                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
 813         }
 814         mutex_unlock(&data->update_lock);
 815         return count;
 816 }
 817 static ssize_t set_pwm_freq(struct device *dev,
 818                 struct device_attribute *attr, const char *buf, size_t count)
 819 {
 820         struct it87_data *data = dev_get_drvdata(dev);
 821         unsigned long val;
 822         int i;
 823
 824         if (strict_strtoul(buf, 10, &val) < 0)
 825                 return -EINVAL;
 826
 827         /* Search for the nearest available frequency */
 828         for (i = 0; i < 7; i++) {
 829                 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
 830                         break;
 831         }
 832
 833         mutex_lock(&data->update_lock);
 834         data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
 835         data->fan_ctl |= i << 4;
 836         it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
 837         mutex_unlock(&data->update_lock);
 838
 839         return count;
 840 }
 841 static ssize_t show_pwm_temp_map(struct device *dev,
 842                 struct device_attribute *attr, char *buf)
 843 {
 844         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 845         int nr = sensor_attr->index;
 846
 847         struct it87_data *data = it87_update_device(dev);
 848         int map;
 849
 850         if (data->pwm_temp_map[nr] < 3)
 851                 map = 1 << data->pwm_temp_map[nr];
 852         else
 853                 map = 0;                        /* Should never happen */
 854         return sprintf(buf, "%d\n", map);
 855 }
 856 static ssize_t set_pwm_temp_map(struct device *dev,
 857                 struct device_attribute *attr, const char *buf, size_t count)
 858 {
 859         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 860         int nr = sensor_attr->index;
 861
 862         struct it87_data *data = dev_get_drvdata(dev);
 863         long val;
 864         u8 reg;
 865
 866         /* This check can go away if we ever support automatic fan speed
 867            control on newer chips. */
 868         if (!has_old_autopwm(data)) {
 869                 dev_notice(dev, "Mapping change disabled for safety reasons\n");
 870                 return -EINVAL;
 871         }
 872
 873         if (strict_strtol(buf, 10, &val) < 0)
 874                 return -EINVAL;
 875
 876         switch (val) {
 877         case (1 << 0):
 878                 reg = 0x00;
 879                 break;
 880         case (1 << 1):
 881                 reg = 0x01;
 882                 break;
 883         case (1 << 2):
 884                 reg = 0x02;
 885                 break;
 886         default:
 887                 return -EINVAL;
 888         }
 889
 890         mutex_lock(&data->update_lock);
 891         data->pwm_temp_map[nr] = reg;
 892         /* If we are in automatic mode, write the temp mapping immediately;
 893          * otherwise, just store it for later use. */
 894         if (data->pwm_ctrl[nr] & 0x80) {
 895                 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
 896                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
 897         }
 898         mutex_unlock(&data->update_lock);
 899         return count;
 900 }
 901
 902 static ssize_t show_auto_pwm(struct device *dev,
 903                 struct device_attribute *attr, char *buf)
 904 {
 905         struct it87_data *data = it87_update_device(dev);
 906         struct sensor_device_attribute_2 *sensor_attr =
 907                         to_sensor_dev_attr_2(attr);
 908         int nr = sensor_attr->nr;
 909         int point = sensor_attr->index;
 910
 911         return sprintf(buf, "%d\n", PWM_FROM_REG(data->auto_pwm[nr][point]));
 912 }
 913
 914 static ssize_t set_auto_pwm(struct device *dev,
 915                 struct device_attribute *attr, const char *buf, size_t count)
 916 {
 917         struct it87_data *data = dev_get_drvdata(dev);
 918         struct sensor_device_attribute_2 *sensor_attr =
 919                         to_sensor_dev_attr_2(attr);
 920         int nr = sensor_attr->nr;
 921         int point = sensor_attr->index;
 922         long val;
 923
 924         if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
 925                 return -EINVAL;
 926
 927         mutex_lock(&data->update_lock);
 928         data->auto_pwm[nr][point] = PWM_TO_REG(val);
 929         it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
 930                          data->auto_pwm[nr][point]);
 931         mutex_unlock(&data->update_lock);
 932         return count;
 933 }
 934
 935 static ssize_t show_auto_temp(struct device *dev,
 936                 struct device_attribute *attr, char *buf)
 937 {
 938         struct it87_data *data = it87_update_device(dev);
 939         struct sensor_device_attribute_2 *sensor_attr =
 940                         to_sensor_dev_attr_2(attr);
 941         int nr = sensor_attr->nr;
 942         int point = sensor_attr->index;
 943
 944         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
 945 }
 946
 947 static ssize_t set_auto_temp(struct device *dev,
 948                 struct device_attribute *attr, const char *buf, size_t count)
 949 {
 950         struct it87_data *data = dev_get_drvdata(dev);
 951         struct sensor_device_attribute_2 *sensor_attr =
 952                         to_sensor_dev_attr_2(attr);
 953         int nr = sensor_attr->nr;
 954         int point = sensor_attr->index;
 955         long val;
 956
 957         if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
 958                 return -EINVAL;
 959
 960         mutex_lock(&data->update_lock);
 961         data->auto_temp[nr][point] = TEMP_TO_REG(val);
 962         it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
 963                          data->auto_temp[nr][point]);
 964         mutex_unlock(&data->update_lock);
 965         return count;
 966 }
 967
 968 #define show_fan_offset(offset)                                 \
 969 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,         \
 970                 show_fan, NULL, offset - 1);                    \
 971 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
 972                 show_fan_min, set_fan_min, offset - 1);         \
 973 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
 974                 show_fan_div, set_fan_div, offset - 1);
 975
 976 show_fan_offset(1);
 977 show_fan_offset(2);
 978 show_fan_offset(3);
 979
 980 #define show_pwm_offset(offset)                                         \
 981 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR,      \
 982                 show_pwm_enable, set_pwm_enable, offset - 1);           \
 983 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,               \
 984                 show_pwm, set_pwm, offset - 1);                         \
 985 static DEVICE_ATTR(pwm##offset##_freq,                                  \
 986                 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO),            \
 987                 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL));    \
 988 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp,             \
 989                 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
 990                 offset - 1);                                            \
 991 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm,              \
 992                 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,         \
 993                 offset - 1, 0);                                         \
 994 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm,              \
 995                 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,         \
 996                 offset - 1, 1);                                         \
 997 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm,              \
 998                 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,         \
 999                 offset - 1, 2);                                         \
1000 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm,              \
1001                 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3);           \
1002 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp,             \
1003                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1004                 offset - 1, 1);                                         \
1005 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst,        \
1006                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1007                 offset - 1, 0);                                         \
1008 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp,             \
1009                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1010                 offset - 1, 2);                                         \
1011 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp,             \
1012                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1013                 offset - 1, 3);                                         \
1014 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp,             \
1015                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1016                 offset - 1, 4);
1017
1018 show_pwm_offset(1);
1019 show_pwm_offset(2);
1020 show_pwm_offset(3);
1021
1022 /* A different set of callbacks for 16-bit fans */
1023 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
1024                 char *buf)
1025 {
1026         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1027         int nr = sensor_attr->index;
1028         struct it87_data *data = it87_update_device(dev);
1029         return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
1030 }
1031
1032 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
1033                 char *buf)
1034 {
1035         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1036         int nr = sensor_attr->index;
1037         struct it87_data *data = it87_update_device(dev);
1038         return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
1039 }
1040
1041 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
1042                 const char *buf, size_t count)
1043 {
1044         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1045         int nr = sensor_attr->index;
1046         struct it87_data *data = dev_get_drvdata(dev);
1047         long val;
1048
1049         if (strict_strtol(buf, 10, &val) < 0)
1050                 return -EINVAL;
1051
1052         mutex_lock(&data->update_lock);
1053         data->fan_min[nr] = FAN16_TO_REG(val);
1054         it87_write_value(data, IT87_REG_FAN_MIN[nr],
1055                          data->fan_min[nr] & 0xff);
1056         it87_write_value(data, IT87_REG_FANX_MIN[nr],
1057                          data->fan_min[nr] >> 8);
1058         mutex_unlock(&data->update_lock);
1059         return count;
1060 }
1061
1062 /* We want to use the same sysfs file names as 8-bit fans, but we need
1063    different variable names, so we have to use SENSOR_ATTR instead of
1064    SENSOR_DEVICE_ATTR. */
1065 #define show_fan16_offset(offset) \
1066 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
1067         = SENSOR_ATTR(fan##offset##_input, S_IRUGO,             \
1068                 show_fan16, NULL, offset - 1);                  \
1069 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
1070         = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,     \
1071                 show_fan16_min, set_fan16_min, offset - 1)
1072
1073 show_fan16_offset(1);
1074 show_fan16_offset(2);
1075 show_fan16_offset(3);
1076 show_fan16_offset(4);
1077 show_fan16_offset(5);
1078
1079 /* Alarms */
1080 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1081                 char *buf)
1082 {
1083         struct it87_data *data = it87_update_device(dev);
1084         return sprintf(buf, "%u\n", data->alarms);
1085 }
1086 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1087
1088 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1089                 char *buf)
1090 {
1091         int bitnr = to_sensor_dev_attr(attr)->index;
1092         struct it87_data *data = it87_update_device(dev);
1093         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1094 }
1095 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1096 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1097 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1098 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1099 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1100 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1101 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1102 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1103 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1104 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1105 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1106 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1107 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1108 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1109 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1110 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1111
1112 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1113                 char *buf)
1114 {
1115         int bitnr = to_sensor_dev_attr(attr)->index;
1116         struct it87_data *data = it87_update_device(dev);
1117         return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1118 }
1119 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1120                 const char *buf, size_t count)
1121 {
1122         int bitnr = to_sensor_dev_attr(attr)->index;
1123         struct it87_data *data = dev_get_drvdata(dev);
1124         long val;
1125
1126         if (strict_strtol(buf, 10, &val) < 0
1127          || (val != 0 && val != 1))
1128                 return -EINVAL;
1129
1130         mutex_lock(&data->update_lock);
1131         data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1132         if (val)
1133                 data->beeps |= (1 << bitnr);
1134         else
1135                 data->beeps &= ~(1 << bitnr);
1136         it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1137         mutex_unlock(&data->update_lock);
1138         return count;
1139 }
1140
1141 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1142                           show_beep, set_beep, 1);
1143 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1144 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1145 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1146 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1147 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1148 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1149 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1150 /* fanX_beep writability is set later */
1151 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1152 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1153 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1154 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1155 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1156 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1157                           show_beep, set_beep, 2);
1158 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1159 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1160
1161 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1162                 char *buf)
1163 {
1164         struct it87_data *data = dev_get_drvdata(dev);
1165         return sprintf(buf, "%u\n", data->vrm);
1166 }
1167 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1168                 const char *buf, size_t count)
1169 {
1170         struct it87_data *data = dev_get_drvdata(dev);
1171         unsigned long val;
1172
1173         if (strict_strtoul(buf, 10, &val) < 0)
1174                 return -EINVAL;
1175
1176         data->vrm = val;
1177
1178         return count;
1179 }
1180 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1181
1182 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1183                 char *buf)
1184 {
1185         struct it87_data *data = it87_update_device(dev);
1186         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1187 }
1188 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1189
1190 static ssize_t show_name(struct device *dev, struct device_attribute
1191                          *devattr, char *buf)
1192 {
1193         struct it87_data *data = dev_get_drvdata(dev);
1194         return sprintf(buf, "%s\n", data->name);
1195 }
1196 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1197
1198 static struct attribute *it87_attributes[] = {
1199         &sensor_dev_attr_in0_input.dev_attr.attr,
1200         &sensor_dev_attr_in1_input.dev_attr.attr,
1201         &sensor_dev_attr_in2_input.dev_attr.attr,
1202         &sensor_dev_attr_in3_input.dev_attr.attr,
1203         &sensor_dev_attr_in4_input.dev_attr.attr,
1204         &sensor_dev_attr_in5_input.dev_attr.attr,
1205         &sensor_dev_attr_in6_input.dev_attr.attr,
1206         &sensor_dev_attr_in7_input.dev_attr.attr,
1207         &sensor_dev_attr_in8_input.dev_attr.attr,
1208         &sensor_dev_attr_in0_min.dev_attr.attr,
1209         &sensor_dev_attr_in1_min.dev_attr.attr,
1210         &sensor_dev_attr_in2_min.dev_attr.attr,
1211         &sensor_dev_attr_in3_min.dev_attr.attr,
1212         &sensor_dev_attr_in4_min.dev_attr.attr,
1213         &sensor_dev_attr_in5_min.dev_attr.attr,
1214         &sensor_dev_attr_in6_min.dev_attr.attr,
1215         &sensor_dev_attr_in7_min.dev_attr.attr,
1216         &sensor_dev_attr_in0_max.dev_attr.attr,
1217         &sensor_dev_attr_in1_max.dev_attr.attr,
1218         &sensor_dev_attr_in2_max.dev_attr.attr,
1219         &sensor_dev_attr_in3_max.dev_attr.attr,
1220         &sensor_dev_attr_in4_max.dev_attr.attr,
1221         &sensor_dev_attr_in5_max.dev_attr.attr,
1222         &sensor_dev_attr_in6_max.dev_attr.attr,
1223         &sensor_dev_attr_in7_max.dev_attr.attr,
1224         &sensor_dev_attr_in0_alarm.dev_attr.attr,
1225         &sensor_dev_attr_in1_alarm.dev_attr.attr,
1226         &sensor_dev_attr_in2_alarm.dev_attr.attr,
1227         &sensor_dev_attr_in3_alarm.dev_attr.attr,
1228         &sensor_dev_attr_in4_alarm.dev_attr.attr,
1229         &sensor_dev_attr_in5_alarm.dev_attr.attr,
1230         &sensor_dev_attr_in6_alarm.dev_attr.attr,
1231         &sensor_dev_attr_in7_alarm.dev_attr.attr,
1232
1233         &sensor_dev_attr_temp1_input.dev_attr.attr,
1234         &sensor_dev_attr_temp2_input.dev_attr.attr,
1235         &sensor_dev_attr_temp3_input.dev_attr.attr,
1236         &sensor_dev_attr_temp1_max.dev_attr.attr,
1237         &sensor_dev_attr_temp2_max.dev_attr.attr,
1238         &sensor_dev_attr_temp3_max.dev_attr.attr,
1239         &sensor_dev_attr_temp1_min.dev_attr.attr,
1240         &sensor_dev_attr_temp2_min.dev_attr.attr,
1241         &sensor_dev_attr_temp3_min.dev_attr.attr,
1242         &sensor_dev_attr_temp1_type.dev_attr.attr,
1243         &sensor_dev_attr_temp2_type.dev_attr.attr,
1244         &sensor_dev_attr_temp3_type.dev_attr.attr,
1245         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1246         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1247         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1248
1249         &dev_attr_alarms.attr,
1250         &dev_attr_name.attr,
1251         NULL
1252 };
1253
1254 static const struct attribute_group it87_group = {
1255         .attrs = it87_attributes,
1256 };
1257
1258 static struct attribute *it87_attributes_beep[] = {
1259         &sensor_dev_attr_in0_beep.dev_attr.attr,
1260         &sensor_dev_attr_in1_beep.dev_attr.attr,
1261         &sensor_dev_attr_in2_beep.dev_attr.attr,
1262         &sensor_dev_attr_in3_beep.dev_attr.attr,
1263         &sensor_dev_attr_in4_beep.dev_attr.attr,
1264         &sensor_dev_attr_in5_beep.dev_attr.attr,
1265         &sensor_dev_attr_in6_beep.dev_attr.attr,
1266         &sensor_dev_attr_in7_beep.dev_attr.attr,
1267
1268         &sensor_dev_attr_temp1_beep.dev_attr.attr,
1269         &sensor_dev_attr_temp2_beep.dev_attr.attr,
1270         &sensor_dev_attr_temp3_beep.dev_attr.attr,
1271         NULL
1272 };
1273
1274 static const struct attribute_group it87_group_beep = {
1275         .attrs = it87_attributes_beep,
1276 };
1277
1278 static struct attribute *it87_attributes_fan16[5][3+1] = { {
1279         &sensor_dev_attr_fan1_input16.dev_attr.attr,
1280         &sensor_dev_attr_fan1_min16.dev_attr.attr,
1281         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1282         NULL
1283 }, {
1284         &sensor_dev_attr_fan2_input16.dev_attr.attr,
1285         &sensor_dev_attr_fan2_min16.dev_attr.attr,
1286         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1287         NULL
1288 }, {
1289         &sensor_dev_attr_fan3_input16.dev_attr.attr,
1290         &sensor_dev_attr_fan3_min16.dev_attr.attr,
1291         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1292         NULL
1293 }, {
1294         &sensor_dev_attr_fan4_input16.dev_attr.attr,
1295         &sensor_dev_attr_fan4_min16.dev_attr.attr,
1296         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1297         NULL
1298 }, {
1299         &sensor_dev_attr_fan5_input16.dev_attr.attr,
1300         &sensor_dev_attr_fan5_min16.dev_attr.attr,
1301         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1302         NULL
1303 } };
1304
1305 static const struct attribute_group it87_group_fan16[5] = {
1306         { .attrs = it87_attributes_fan16[0] },
1307         { .attrs = it87_attributes_fan16[1] },
1308         { .attrs = it87_attributes_fan16[2] },
1309         { .attrs = it87_attributes_fan16[3] },
1310         { .attrs = it87_attributes_fan16[4] },
1311 };
1312
1313 static struct attribute *it87_attributes_fan[3][4+1] = { {
1314         &sensor_dev_attr_fan1_input.dev_attr.attr,
1315         &sensor_dev_attr_fan1_min.dev_attr.attr,
1316         &sensor_dev_attr_fan1_div.dev_attr.attr,
1317         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1318         NULL
1319 }, {
1320         &sensor_dev_attr_fan2_input.dev_attr.attr,
1321         &sensor_dev_attr_fan2_min.dev_attr.attr,
1322         &sensor_dev_attr_fan2_div.dev_attr.attr,
1323         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1324         NULL
1325 }, {
1326         &sensor_dev_attr_fan3_input.dev_attr.attr,
1327         &sensor_dev_attr_fan3_min.dev_attr.attr,
1328         &sensor_dev_attr_fan3_div.dev_attr.attr,
1329         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1330         NULL
1331 } };
1332
1333 static const struct attribute_group it87_group_fan[3] = {
1334         { .attrs = it87_attributes_fan[0] },
1335         { .attrs = it87_attributes_fan[1] },
1336         { .attrs = it87_attributes_fan[2] },
1337 };
1338
1339 static const struct attribute_group *
1340 it87_get_fan_group(const struct it87_data *data)
1341 {
1342         return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
1343 }
1344
1345 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1346         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1347         &sensor_dev_attr_pwm1.dev_attr.attr,
1348         &dev_attr_pwm1_freq.attr,
1349         &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1350         NULL
1351 }, {
1352         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1353         &sensor_dev_attr_pwm2.dev_attr.attr,
1354         &dev_attr_pwm2_freq.attr,
1355         &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1356         NULL
1357 }, {
1358         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1359         &sensor_dev_attr_pwm3.dev_attr.attr,
1360         &dev_attr_pwm3_freq.attr,
1361         &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1362         NULL
1363 } };
1364
1365 static const struct attribute_group it87_group_pwm[3] = {
1366         { .attrs = it87_attributes_pwm[0] },
1367         { .attrs = it87_attributes_pwm[1] },
1368         { .attrs = it87_attributes_pwm[2] },
1369 };
1370
1371 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1372         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1373         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1374         &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1375         &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1376         &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1377         &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1378         &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1379         &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1380         &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1381         NULL
1382 }, {
1383         &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1384         &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1385         &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1386         &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1387         &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1388         &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1389         &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1390         &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1391         &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1392         NULL
1393 }, {
1394         &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1395         &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1396         &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1397         &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1398         &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1399         &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1400         &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1401         &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1402         &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1403         NULL
1404 } };
1405
1406 static const struct attribute_group it87_group_autopwm[3] = {
1407         { .attrs = it87_attributes_autopwm[0] },
1408         { .attrs = it87_attributes_autopwm[1] },
1409         { .attrs = it87_attributes_autopwm[2] },
1410 };
1411
1412 static struct attribute *it87_attributes_fan_beep[] = {
1413         &sensor_dev_attr_fan1_beep.dev_attr.attr,
1414         &sensor_dev_attr_fan2_beep.dev_attr.attr,
1415         &sensor_dev_attr_fan3_beep.dev_attr.attr,
1416         &sensor_dev_attr_fan4_beep.dev_attr.attr,
1417         &sensor_dev_attr_fan5_beep.dev_attr.attr,
1418 };
1419
1420 static struct attribute *it87_attributes_vid[] = {
1421         &dev_attr_vrm.attr,
1422         &dev_attr_cpu0_vid.attr,
1423         NULL
1424 };
1425
1426 static const struct attribute_group it87_group_vid = {
1427         .attrs = it87_attributes_vid,
1428 };
1429
1430 /* SuperIO detection - will change isa_address if a chip is found */
1431 static int __init it87_find(unsigned short *address,
1432         struct it87_sio_data *sio_data)
1433 {
1434         int err = -ENODEV;
1435         u16 chip_type;
1436         const char *board_vendor, *board_name;
1437
1438         superio_enter();
1439         chip_type = force_id ? force_id : superio_inw(DEVID);
1440
1441         switch (chip_type) {
1442         case IT8705F_DEVID:
1443                 sio_data->type = it87;
1444                 break;
1445         case IT8712F_DEVID:
1446                 sio_data->type = it8712;
1447                 break;
1448         case IT8716F_DEVID:
1449         case IT8726F_DEVID:
1450                 sio_data->type = it8716;
1451                 break;
1452         case IT8718F_DEVID:
1453                 sio_data->type = it8718;
1454                 break;
1455         case IT8720F_DEVID:
1456                 sio_data->type = it8720;
1457                 break;
1458         case 0xffff:    /* No device at all */
1459                 goto exit;
1460         default:
1461                 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n",
1462                          chip_type);
1463                 goto exit;
1464         }
1465
1466         superio_select(PME);
1467         if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1468                 pr_info("it87: Device not activated, skipping\n");
1469                 goto exit;
1470         }
1471
1472         *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1473         if (*address == 0) {
1474                 pr_info("it87: Base address not set, skipping\n");
1475                 goto exit;
1476         }
1477
1478         err = 0;
1479         sio_data->revision = superio_inb(DEVREV) & 0x0f;
1480         pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
1481                 chip_type, *address, sio_data->revision);
1482
1483         /* Read GPIO config and VID value from LDN 7 (GPIO) */
1484         if (sio_data->type == it87) {
1485                 /* The IT8705F doesn't have VID pins at all */
1486                 sio_data->skip_vid = 1;
1487
1488                 /* The IT8705F has a different LD number for GPIO */
1489                 superio_select(5);
1490                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1491         } else {
1492                 int reg;
1493
1494                 superio_select(GPIO);
1495                 /* We need at least 4 VID pins */
1496                 reg = superio_inb(IT87_SIO_GPIO3_REG);
1497                 if (reg & 0x0f) {
1498                         pr_info("it87: VID is disabled (pins used for GPIO)\n");
1499                         sio_data->skip_vid = 1;
1500                 }
1501
1502                 /* Check if fan3 is there or not */
1503                 if (reg & (1 << 6))
1504                         sio_data->skip_pwm |= (1 << 2);
1505                 if (reg & (1 << 7))
1506                         sio_data->skip_fan |= (1 << 2);
1507
1508                 /* Check if fan2 is there or not */
1509                 reg = superio_inb(IT87_SIO_GPIO5_REG);
1510                 if (reg & (1 << 1))
1511                         sio_data->skip_pwm |= (1 << 1);
1512                 if (reg & (1 << 2))
1513                         sio_data->skip_fan |= (1 << 1);
1514
1515                 if ((sio_data->type == it8718 || sio_data->type == it8720)
1516                  && !(sio_data->skip_vid))
1517                         sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1518
1519                 reg = superio_inb(IT87_SIO_PINX2_REG);
1520                 if (reg & (1 << 0))
1521                         pr_info("it87: in3 is VCC (+5V)\n");
1522                 if (reg & (1 << 1))
1523                         pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
1524
1525                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1526         }
1527         if (sio_data->beep_pin)
1528                 pr_info("it87: Beeping is supported\n");
1529
1530         /* Disable specific features based on DMI strings */
1531         board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1532         board_name = dmi_get_system_info(DMI_BOARD_NAME);
1533         if (board_vendor && board_name) {
1534                 if (strcmp(board_vendor, "nVIDIA") == 0
1535                  && strcmp(board_name, "FN68PT") == 0) {
1536                         /* On the Shuttle SN68PT, FAN_CTL2 is apparently not
1537                            connected to a fan, but to something else. One user
1538                            has reported instant system power-off when changing
1539                            the PWM2 duty cycle, so we disable it.
1540                            I use the board name string as the trigger in case
1541                            the same board is ever used in other systems. */
1542                         pr_info("it87: Disabling pwm2 due to "
1543                                 "hardware constraints\n");
1544                         sio_data->skip_pwm = (1 << 1);
1545                 }
1546         }
1547
1548 exit:
1549         superio_exit();
1550         return err;
1551 }
1552
1553 static void it87_remove_files(struct device *dev)
1554 {
1555         struct it87_data *data = platform_get_drvdata(pdev);
1556         struct it87_sio_data *sio_data = dev->platform_data;
1557         const struct attribute_group *fan_group = it87_get_fan_group(data);
1558         int i;
1559
1560         sysfs_remove_group(&dev->kobj, &it87_group);
1561         if (sio_data->beep_pin)
1562                 sysfs_remove_group(&dev->kobj, &it87_group_beep);
1563         for (i = 0; i < 5; i++) {
1564                 if (!(data->has_fan & (1 << i)))
1565                         continue;
1566                 sysfs_remove_group(&dev->kobj, &fan_group[i]);
1567                 if (sio_data->beep_pin)
1568                         sysfs_remove_file(&dev->kobj,
1569                                           it87_attributes_fan_beep[i]);
1570         }
1571         for (i = 0; i < 3; i++) {
1572                 if (sio_data->skip_pwm & (1 << 0))
1573                         continue;
1574                 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1575                 if (has_old_autopwm(data))
1576                         sysfs_remove_group(&dev->kobj,
1577                                            &it87_group_autopwm[i]);
1578         }
1579         if (!sio_data->skip_vid)
1580                 sysfs_remove_group(&dev->kobj, &it87_group_vid);
1581 }
1582
1583 static int __devinit it87_probe(struct platform_device *pdev)
1584 {
1585         struct it87_data *data;
1586         struct resource *res;
1587         struct device *dev = &pdev->dev;
1588         struct it87_sio_data *sio_data = dev->platform_data;
1589         const struct attribute_group *fan_group;
1590         int err = 0, i;
1591         int enable_pwm_interface;
1592         int fan_beep_need_rw;
1593         static const char *names[] = {
1594                 "it87",
1595                 "it8712",
1596                 "it8716",
1597                 "it8718",
1598                 "it8720",
1599         };
1600
1601         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1602         if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
1603                 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1604                         (unsigned long)res->start,
1605                         (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1606                 err = -EBUSY;
1607                 goto ERROR0;
1608         }
1609
1610         data = kzalloc(sizeof(struct it87_data), GFP_KERNEL);
1611         if (!data) {
1612                 err = -ENOMEM;
1613                 goto ERROR1;
1614         }
1615
1616         data->addr = res->start;
1617         data->type = sio_data->type;
1618         data->revision = sio_data->revision;
1619         data->name = names[sio_data->type];
1620
1621         /* Now, we do the remaining detection. */
1622         if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1623          || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
1624                 err = -ENODEV;
1625                 goto ERROR2;
1626         }
1627
1628         platform_set_drvdata(pdev, data);
1629
1630         mutex_init(&data->update_lock);
1631
1632         /* Check PWM configuration */
1633         enable_pwm_interface = it87_check_pwm(dev);
1634
1635         /* Initialize the IT87 chip */
1636         it87_init_device(pdev);
1637
1638         /* Register sysfs hooks */
1639         err = sysfs_create_group(&dev->kobj, &it87_group);
1640         if (err)
1641                 goto ERROR2;
1642
1643         if (sio_data->beep_pin) {
1644                 err = sysfs_create_group(&dev->kobj, &it87_group_beep);
1645                 if (err)
1646                         goto ERROR4;
1647         }
1648
1649         /* Do not create fan files for disabled fans */
1650         fan_group = it87_get_fan_group(data);
1651         fan_beep_need_rw = 1;
1652         for (i = 0; i < 5; i++) {
1653                 if (!(data->has_fan & (1 << i)))
1654                         continue;
1655                 err = sysfs_create_group(&dev->kobj, &fan_group[i]);
1656                 if (err)
1657                         goto ERROR4;
1658
1659                 if (sio_data->beep_pin) {
1660                         err = sysfs_create_file(&dev->kobj,
1661                                                 it87_attributes_fan_beep[i]);
1662                         if (err)
1663                                 goto ERROR4;
1664                         if (!fan_beep_need_rw)
1665                                 continue;
1666
1667                         /* As we have a single beep enable bit for all fans,
1668                          * only the first enabled fan has a writable attribute
1669                          * for it. */
1670                         if (sysfs_chmod_file(&dev->kobj,
1671                                              it87_attributes_fan_beep[i],
1672                                              S_IRUGO | S_IWUSR))
1673                                 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
1674                                         i + 1);
1675                         fan_beep_need_rw = 0;
1676                 }
1677         }
1678
1679         if (enable_pwm_interface) {
1680                 for (i = 0; i < 3; i++) {
1681                         if (sio_data->skip_pwm & (1 << i))
1682                                 continue;
1683                         err = sysfs_create_group(&dev->kobj,
1684                                                  &it87_group_pwm[i]);
1685                         if (err)
1686                                 goto ERROR4;
1687
1688                         if (!has_old_autopwm(data))
1689                                 continue;
1690                         err = sysfs_create_group(&dev->kobj,
1691                                                  &it87_group_autopwm[i]);
1692                         if (err)
1693                                 goto ERROR4;
1694                 }
1695         }
1696
1697         if (!sio_data->skip_vid) {
1698                 data->vrm = vid_which_vrm();
1699                 /* VID reading from Super-I/O config space if available */
1700                 data->vid = sio_data->vid_value;
1701                 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
1702                 if (err)
1703                         goto ERROR4;
1704         }
1705
1706         data->hwmon_dev = hwmon_device_register(dev);
1707         if (IS_ERR(data->hwmon_dev)) {
1708                 err = PTR_ERR(data->hwmon_dev);
1709                 goto ERROR4;
1710         }
1711
1712         return 0;
1713
1714 ERROR4:
1715         it87_remove_files(dev);
1716 ERROR2:
1717         platform_set_drvdata(pdev, NULL);
1718         kfree(data);
1719 ERROR1:
1720         release_region(res->start, IT87_EC_EXTENT);
1721 ERROR0:
1722         return err;
1723 }
1724
1725 static int __devexit it87_remove(struct platform_device *pdev)
1726 {
1727         struct it87_data *data = platform_get_drvdata(pdev);
1728
1729         hwmon_device_unregister(data->hwmon_dev);
1730         it87_remove_files(&pdev->dev);
1731
1732         release_region(data->addr, IT87_EC_EXTENT);
1733         platform_set_drvdata(pdev, NULL);
1734         kfree(data);
1735
1736         return 0;
1737 }
1738
1739 /* Must be called with data->update_lock held, except during initialization.
1740    We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1741    would slow down the IT87 access and should not be necessary. */
1742 static int it87_read_value(struct it87_data *data, u8 reg)
1743 {
1744         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1745         return inb_p(data->addr + IT87_DATA_REG_OFFSET);
1746 }
1747
1748 /* Must be called with data->update_lock held, except during initialization.
1749    We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1750    would slow down the IT87 access and should not be necessary. */
1751 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
1752 {
1753         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1754         outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
1755 }
1756
1757 /* Return 1 if and only if the PWM interface is safe to use */
1758 static int __devinit it87_check_pwm(struct device *dev)
1759 {
1760         struct it87_data *data = dev_get_drvdata(dev);
1761         /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
1762          * and polarity set to active low is sign that this is the case so we
1763          * disable pwm control to protect the user. */
1764         int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1765         if ((tmp & 0x87) == 0) {
1766                 if (fix_pwm_polarity) {
1767                         /* The user asks us to attempt a chip reconfiguration.
1768                          * This means switching to active high polarity and
1769                          * inverting all fan speed values. */
1770                         int i;
1771                         u8 pwm[3];
1772
1773                         for (i = 0; i < 3; i++)
1774                                 pwm[i] = it87_read_value(data,
1775                                                          IT87_REG_PWM(i));
1776
1777                         /* If any fan is in automatic pwm mode, the polarity
1778                          * might be correct, as suspicious as it seems, so we
1779                          * better don't change anything (but still disable the
1780                          * PWM interface). */
1781                         if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
1782                                 dev_info(dev, "Reconfiguring PWM to "
1783                                          "active high polarity\n");
1784                                 it87_write_value(data, IT87_REG_FAN_CTL,
1785                                                  tmp | 0x87);
1786                                 for (i = 0; i < 3; i++)
1787                                         it87_write_value(data,
1788                                                          IT87_REG_PWM(i),
1789                                                          0x7f & ~pwm[i]);
1790                                 return 1;
1791                         }
1792
1793                         dev_info(dev, "PWM configuration is "
1794                                  "too broken to be fixed\n");
1795                 }
1796
1797                 dev_info(dev, "Detected broken BIOS "
1798                          "defaults, disabling PWM interface\n");
1799                 return 0;
1800         } else if (fix_pwm_polarity) {
1801                 dev_info(dev, "PWM configuration looks "
1802                          "sane, won't touch\n");
1803         }
1804
1805         return 1;
1806 }
1807
1808 /* Called when we have found a new IT87. */
1809 static void __devinit it87_init_device(struct platform_device *pdev)
1810 {
1811         struct it87_sio_data *sio_data = pdev->dev.platform_data;
1812         struct it87_data *data = platform_get_drvdata(pdev);
1813         int tmp, i;
1814         u8 mask;
1815
1816         /* For each PWM channel:
1817          * - If it is in automatic mode, setting to manual mode should set
1818          *   the fan to full speed by default.
1819          * - If it is in manual mode, we need a mapping to temperature
1820          *   channels to use when later setting to automatic mode later.
1821          *   Use a 1:1 mapping by default (we are clueless.)
1822          * In both cases, the value can (and should) be changed by the user
1823          * prior to switching to a different mode. */
1824         for (i = 0; i < 3; i++) {
1825                 data->pwm_temp_map[i] = i;
1826                 data->pwm_duty[i] = 0x7f;       /* Full speed */
1827                 data->auto_pwm[i][3] = 0x7f;    /* Full speed, hard-coded */
1828         }
1829
1830         /* Some chips seem to have default value 0xff for all limit
1831          * registers. For low voltage limits it makes no sense and triggers
1832          * alarms, so change to 0 instead. For high temperature limits, it
1833          * means -1 degree C, which surprisingly doesn't trigger an alarm,
1834          * but is still confusing, so change to 127 degrees C. */
1835         for (i = 0; i < 8; i++) {
1836                 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
1837                 if (tmp == 0xff)
1838                         it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
1839         }
1840         for (i = 0; i < 3; i++) {
1841                 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1842                 if (tmp == 0xff)
1843                         it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
1844         }
1845
1846         /* Temperature channels are not forcibly enabled, as they can be
1847          * set to two different sensor types and we can't guess which one
1848          * is correct for a given system. These channels can be enabled at
1849          * run-time through the temp{1-3}_type sysfs accessors if needed. */
1850
1851         /* Check if voltage monitors are reset manually or by some reason */
1852         tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
1853         if ((tmp & 0xff) == 0) {
1854                 /* Enable all voltage monitors */
1855                 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
1856         }
1857
1858         /* Check if tachometers are reset manually or by some reason */
1859         mask = 0x70 & ~(sio_data->skip_fan << 4);
1860         data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
1861         if ((data->fan_main_ctrl & mask) == 0) {
1862                 /* Enable all fan tachometers */
1863                 data->fan_main_ctrl |= mask;
1864                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1865                                  data->fan_main_ctrl);
1866         }
1867         data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
1868
1869         /* Set tachometers to 16-bit mode if needed */
1870         if (has_16bit_fans(data)) {
1871                 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
1872                 if (~tmp & 0x07 & data->has_fan) {
1873                         dev_dbg(&pdev->dev,
1874                                 "Setting fan1-3 to 16-bit mode\n");
1875                         it87_write_value(data, IT87_REG_FAN_16BIT,
1876                                          tmp | 0x07);
1877                 }
1878                 /* IT8705F only supports three fans. */
1879                 if (data->type != it87) {
1880                         if (tmp & (1 << 4))
1881                                 data->has_fan |= (1 << 3); /* fan4 enabled */
1882                         if (tmp & (1 << 5))
1883                                 data->has_fan |= (1 << 4); /* fan5 enabled */
1884                 }
1885         }
1886
1887         /* Fan input pins may be used for alternative functions */
1888         data->has_fan &= ~sio_data->skip_fan;
1889
1890         /* Start monitoring */
1891         it87_write_value(data, IT87_REG_CONFIG,
1892                          (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
1893                          | (update_vbat ? 0x41 : 0x01));
1894 }
1895
1896 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
1897 {
1898         data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
1899         if (data->pwm_ctrl[nr] & 0x80)  /* Automatic mode */
1900                 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
1901         else                            /* Manual mode */
1902                 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
1903
1904         if (has_old_autopwm(data)) {
1905                 int i;
1906
1907                 for (i = 0; i < 5 ; i++)
1908                         data->auto_temp[nr][i] = it87_read_value(data,
1909                                                 IT87_REG_AUTO_TEMP(nr, i));
1910                 for (i = 0; i < 3 ; i++)
1911                         data->auto_pwm[nr][i] = it87_read_value(data,
1912                                                 IT87_REG_AUTO_PWM(nr, i));
1913         }
1914 }
1915
1916 static struct it87_data *it87_update_device(struct device *dev)
1917 {
1918         struct it87_data *data = dev_get_drvdata(dev);
1919         int i;
1920
1921         mutex_lock(&data->update_lock);
1922
1923         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1924             || !data->valid) {
1925                 if (update_vbat) {
1926                         /* Cleared after each update, so reenable.  Value
1927                            returned by this read will be previous value */
1928                         it87_write_value(data, IT87_REG_CONFIG,
1929                                 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
1930                 }
1931                 for (i = 0; i <= 7; i++) {
1932                         data->in[i] =
1933                                 it87_read_value(data, IT87_REG_VIN(i));
1934                         data->in_min[i] =
1935                                 it87_read_value(data, IT87_REG_VIN_MIN(i));
1936                         data->in_max[i] =
1937                                 it87_read_value(data, IT87_REG_VIN_MAX(i));
1938                 }
1939                 /* in8 (battery) has no limit registers */
1940                 data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
1941
1942                 for (i = 0; i < 5; i++) {
1943                         /* Skip disabled fans */
1944                         if (!(data->has_fan & (1 << i)))
1945                                 continue;
1946
1947                         data->fan_min[i] =
1948                                 it87_read_value(data, IT87_REG_FAN_MIN[i]);
1949                         data->fan[i] = it87_read_value(data,
1950                                        IT87_REG_FAN[i]);
1951                         /* Add high byte if in 16-bit mode */
1952                         if (has_16bit_fans(data)) {
1953                                 data->fan[i] |= it87_read_value(data,
1954                                                 IT87_REG_FANX[i]) << 8;
1955                                 data->fan_min[i] |= it87_read_value(data,
1956                                                 IT87_REG_FANX_MIN[i]) << 8;
1957                         }
1958                 }
1959                 for (i = 0; i < 3; i++) {
1960                         data->temp[i] =
1961                                 it87_read_value(data, IT87_REG_TEMP(i));
1962                         data->temp_high[i] =
1963                                 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1964                         data->temp_low[i] =
1965                                 it87_read_value(data, IT87_REG_TEMP_LOW(i));
1966                 }
1967
1968                 /* Newer chips don't have clock dividers */
1969                 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
1970                         i = it87_read_value(data, IT87_REG_FAN_DIV);
1971                         data->fan_div[0] = i & 0x07;
1972                         data->fan_div[1] = (i >> 3) & 0x07;
1973                         data->fan_div[2] = (i & 0x40) ? 3 : 1;
1974                 }
1975
1976                 data->alarms =
1977                         it87_read_value(data, IT87_REG_ALARM1) |
1978                         (it87_read_value(data, IT87_REG_ALARM2) << 8) |
1979                         (it87_read_value(data, IT87_REG_ALARM3) << 16);
1980                 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1981
1982                 data->fan_main_ctrl = it87_read_value(data,
1983                                 IT87_REG_FAN_MAIN_CTRL);
1984                 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
1985                 for (i = 0; i < 3; i++)
1986                         it87_update_pwm_ctrl(data, i);
1987
1988                 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
1989                 /* The 8705 does not have VID capability.
1990                    The 8718 and the 8720 don't use IT87_REG_VID for the
1991                    same purpose. */
1992                 if (data->type == it8712 || data->type == it8716) {
1993                         data->vid = it87_read_value(data, IT87_REG_VID);
1994                         /* The older IT8712F revisions had only 5 VID pins,
1995                            but we assume it is always safe to read 6 bits. */
1996                         data->vid &= 0x3f;
1997                 }
1998                 data->last_updated = jiffies;
1999                 data->valid = 1;
2000         }
2001
2002         mutex_unlock(&data->update_lock);
2003
2004         return data;
2005 }
2006
2007 static int __init it87_device_add(unsigned short address,
2008                                   const struct it87_sio_data *sio_data)
2009 {
2010         struct resource res = {
2011                 .start  = address + IT87_EC_OFFSET,
2012                 .end    = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2013                 .name   = DRVNAME,
2014                 .flags  = IORESOURCE_IO,
2015         };
2016         int err;
2017
2018         err = acpi_check_resource_conflict(&res);
2019         if (err)
2020                 goto exit;
2021
2022         pdev = platform_device_alloc(DRVNAME, address);
2023         if (!pdev) {
2024                 err = -ENOMEM;
2025                 printk(KERN_ERR DRVNAME ": Device allocation failed\n");
2026                 goto exit;
2027         }
2028
2029         err = platform_device_add_resources(pdev, &res, 1);
2030         if (err) {
2031                 printk(KERN_ERR DRVNAME ": Device resource addition failed "
2032                        "(%d)\n", err);
2033                 goto exit_device_put;
2034         }
2035
2036         err = platform_device_add_data(pdev, sio_data,
2037                                        sizeof(struct it87_sio_data));
2038         if (err) {
2039                 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
2040                 goto exit_device_put;
2041         }
2042
2043         err = platform_device_add(pdev);
2044         if (err) {
2045                 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
2046                        err);
2047                 goto exit_device_put;
2048         }
2049
2050         return 0;
2051
2052 exit_device_put:
2053         platform_device_put(pdev);
2054 exit:
2055         return err;
2056 }
2057
2058 static int __init sm_it87_init(void)
2059 {
2060         int err;
2061         unsigned short isa_address = 0;
2062         struct it87_sio_data sio_data;
2063
2064         memset(&sio_data, 0, sizeof(struct it87_sio_data));
2065         err = it87_find(&isa_address, &sio_data);
2066         if (err)
2067                 return err;
2068         err = platform_driver_register(&it87_driver);
2069         if (err)
2070                 return err;
2071
2072         err = it87_device_add(isa_address, &sio_data);
2073         if (err) {
2074                 platform_driver_unregister(&it87_driver);
2075                 return err;
2076         }
2077
2078         return 0;
2079 }
2080
2081 static void __exit sm_it87_exit(void)
2082 {
2083         platform_device_unregister(pdev);
2084         platform_driver_unregister(&it87_driver);
2085 }
2086
2087
2088 MODULE_AUTHOR("Chris Gauthron, "
2089               "Jean Delvare <khali@linux-fr.org>");
2090 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8720F/8726F, SiS950 driver");
2091 module_param(update_vbat, bool, 0);
2092 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2093 module_param(fix_pwm_polarity, bool, 0);
2094 MODULE_PARM_DESC(fix_pwm_polarity,
2095                  "Force PWM polarity to active high (DANGEROUS)");
2096 MODULE_LICENSE("GPL");
2097
2098 module_init(sm_it87_init);
2099 module_exit(sm_it87_exit);