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
 543         if (strict_strtol(buf, 10, &val) < 0)
 544                 return -EINVAL;
 545
 546         mutex_lock(&data->update_lock);
 547
 548         data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
 549         data->sensor &= ~(1 << nr);
 550         data->sensor &= ~(8 << nr);
 551         if (val == 2) { /* backwards compatibility */
 552                 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
 553                          "instead\n");
 554                 val = 4;
 555         }
 556         /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
 557         if (val == 3)
 558                 data->sensor |= 1 << nr;
 559         else if (val == 4)
 560                 data->sensor |= 8 << nr;
 561         else if (val != 0) {
 562                 mutex_unlock(&data->update_lock);
 563                 return -EINVAL;
 564         }
 565         it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
 566         mutex_unlock(&data->update_lock);
 567         return count;
 568 }
 569 #define show_sensor_offset(offset)                                      \
 570 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR,       \
 571                 show_sensor, set_sensor, offset - 1);
 572
 573 show_sensor_offset(1);
 574 show_sensor_offset(2);
 575 show_sensor_offset(3);
 576
 577 /* 3 Fans */
 578
 579 static int pwm_mode(const struct it87_data *data, int nr)
 580 {
 581         int ctrl = data->fan_main_ctrl & (1 << nr);
 582
 583         if (ctrl == 0)                                  /* Full speed */
 584                 return 0;
 585         if (data->pwm_ctrl[nr] & 0x80)                  /* Automatic mode */
 586                 return 2;
 587         else                                            /* Manual mode */
 588                 return 1;
 589 }
 590
 591 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 592                 char *buf)
 593 {
 594         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 595         int nr = sensor_attr->index;
 596
 597         struct it87_data *data = it87_update_device(dev);
 598         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
 599                                 DIV_FROM_REG(data->fan_div[nr])));
 600 }
 601 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
 602                 char *buf)
 603 {
 604         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 605         int nr = sensor_attr->index;
 606
 607         struct it87_data *data = it87_update_device(dev);
 608         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 609                                 DIV_FROM_REG(data->fan_div[nr])));
 610 }
 611 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
 612                 char *buf)
 613 {
 614         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 615         int nr = sensor_attr->index;
 616
 617         struct it87_data *data = it87_update_device(dev);
 618         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 619 }
 620 static ssize_t show_pwm_enable(struct device *dev,
 621                 struct device_attribute *attr, char *buf)
 622 {
 623         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 624         int nr = sensor_attr->index;
 625
 626         struct it87_data *data = it87_update_device(dev);
 627         return sprintf(buf, "%d\n", pwm_mode(data, nr));
 628 }
 629 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 630                 char *buf)
 631 {
 632         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 633         int nr = sensor_attr->index;
 634
 635         struct it87_data *data = it87_update_device(dev);
 636         return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm_duty[nr]));
 637 }
 638 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
 639                 char *buf)
 640 {
 641         struct it87_data *data = it87_update_device(dev);
 642         int index = (data->fan_ctl >> 4) & 0x07;
 643
 644         return sprintf(buf, "%u\n", pwm_freq[index]);
 645 }
 646 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 647                 const char *buf, size_t count)
 648 {
 649         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 650         int nr = sensor_attr->index;
 651
 652         struct it87_data *data = dev_get_drvdata(dev);
 653         long val;
 654         u8 reg;
 655
 656         if (strict_strtol(buf, 10, &val) < 0)
 657                 return -EINVAL;
 658
 659         mutex_lock(&data->update_lock);
 660         reg = it87_read_value(data, IT87_REG_FAN_DIV);
 661         switch (nr) {
 662         case 0:
 663                 data->fan_div[nr] = reg & 0x07;
 664                 break;
 665         case 1:
 666                 data->fan_div[nr] = (reg >> 3) & 0x07;
 667                 break;
 668         case 2:
 669                 data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
 670                 break;
 671         }
 672
 673         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 674         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
 675         mutex_unlock(&data->update_lock);
 676         return count;
 677 }
 678 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 679                 const char *buf, size_t count)
 680 {
 681         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 682         int nr = sensor_attr->index;
 683
 684         struct it87_data *data = dev_get_drvdata(dev);
 685         unsigned long val;
 686         int min;
 687         u8 old;
 688
 689         if (strict_strtoul(buf, 10, &val) < 0)
 690                 return -EINVAL;
 691
 692         mutex_lock(&data->update_lock);
 693         old = it87_read_value(data, IT87_REG_FAN_DIV);
 694
 695         /* Save fan min limit */
 696         min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
 697
 698         switch (nr) {
 699         case 0:
 700         case 1:
 701                 data->fan_div[nr] = DIV_TO_REG(val);
 702                 break;
 703         case 2:
 704                 if (val < 8)
 705                         data->fan_div[nr] = 1;
 706                 else
 707                         data->fan_div[nr] = 3;
 708         }
 709         val = old & 0x80;
 710         val |= (data->fan_div[0] & 0x07);
 711         val |= (data->fan_div[1] & 0x07) << 3;
 712         if (data->fan_div[2] == 3)
 713                 val |= 0x1 << 6;
 714         it87_write_value(data, IT87_REG_FAN_DIV, val);
 715
 716         /* Restore fan min limit */
 717         data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 718         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
 719
 720         mutex_unlock(&data->update_lock);
 721         return count;
 722 }
 723
 724 /* Returns 0 if OK, -EINVAL otherwise */
 725 static int check_trip_points(struct device *dev, int nr)
 726 {
 727         const struct it87_data *data = dev_get_drvdata(dev);
 728         int i, err = 0;
 729
 730         if (has_old_autopwm(data)) {
 731                 for (i = 0; i < 3; i++) {
 732                         if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
 733                                 err = -EINVAL;
 734                 }
 735                 for (i = 0; i < 2; i++) {
 736                         if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
 737                                 err = -EINVAL;
 738                 }
 739         }
 740
 741         if (err) {
 742                 dev_err(dev, "Inconsistent trip points, not switching to "
 743                         "automatic mode\n");
 744                 dev_err(dev, "Adjust the trip points and try again\n");
 745         }
 746         return err;
 747 }
 748
 749 static ssize_t set_pwm_enable(struct device *dev,
 750                 struct device_attribute *attr, const char *buf, size_t count)
 751 {
 752         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 753         int nr = sensor_attr->index;
 754
 755         struct it87_data *data = dev_get_drvdata(dev);
 756         long val;
 757
 758         if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2)
 759                 return -EINVAL;
 760
 761         /* Check trip points before switching to automatic mode */
 762         if (val == 2) {
 763                 if (check_trip_points(dev, nr) < 0)
 764                         return -EINVAL;
 765         }
 766
 767         mutex_lock(&data->update_lock);
 768
 769         if (val == 0) {
 770                 int tmp;
 771                 /* make sure the fan is on when in on/off mode */
 772                 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
 773                 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
 774                 /* set on/off mode */
 775                 data->fan_main_ctrl &= ~(1 << nr);
 776                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
 777                                  data->fan_main_ctrl);
 778         } else {
 779                 if (val == 1)                           /* Manual mode */
 780                         data->pwm_ctrl[nr] = data->pwm_duty[nr];
 781                 else                                    /* Automatic mode */
 782                         data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
 783                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
 784                 /* set SmartGuardian mode */
 785                 data->fan_main_ctrl |= (1 << nr);
 786                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
 787                                  data->fan_main_ctrl);
 788         }
 789
 790         mutex_unlock(&data->update_lock);
 791         return count;
 792 }
 793 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 794                 const char *buf, size_t count)
 795 {
 796         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 797         int nr = sensor_attr->index;
 798
 799         struct it87_data *data = dev_get_drvdata(dev);
 800         long val;
 801
 802         if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
 803                 return -EINVAL;
 804
 805         mutex_lock(&data->update_lock);
 806         data->pwm_duty[nr] = PWM_TO_REG(val);
 807         /* If we are in manual mode, write the duty cycle immediately;
 808          * otherwise, just store it for later use. */
 809         if (!(data->pwm_ctrl[nr] & 0x80)) {
 810                 data->pwm_ctrl[nr] = data->pwm_duty[nr];
 811                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
 812         }
 813         mutex_unlock(&data->update_lock);
 814         return count;
 815 }
 816 static ssize_t set_pwm_freq(struct device *dev,
 817                 struct device_attribute *attr, const char *buf, size_t count)
 818 {
 819         struct it87_data *data = dev_get_drvdata(dev);
 820         unsigned long val;
 821         int i;
 822
 823         if (strict_strtoul(buf, 10, &val) < 0)
 824                 return -EINVAL;
 825
 826         /* Search for the nearest available frequency */
 827         for (i = 0; i < 7; i++) {
 828                 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
 829                         break;
 830         }
 831
 832         mutex_lock(&data->update_lock);
 833         data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
 834         data->fan_ctl |= i << 4;
 835         it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
 836         mutex_unlock(&data->update_lock);
 837
 838         return count;
 839 }
 840 static ssize_t show_pwm_temp_map(struct device *dev,
 841                 struct device_attribute *attr, char *buf)
 842 {
 843         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 844         int nr = sensor_attr->index;
 845
 846         struct it87_data *data = it87_update_device(dev);
 847         int map;
 848
 849         if (data->pwm_temp_map[nr] < 3)
 850                 map = 1 << data->pwm_temp_map[nr];
 851         else
 852                 map = 0;                        /* Should never happen */
 853         return sprintf(buf, "%d\n", map);
 854 }
 855 static ssize_t set_pwm_temp_map(struct device *dev,
 856                 struct device_attribute *attr, const char *buf, size_t count)
 857 {
 858         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 859         int nr = sensor_attr->index;
 860
 861         struct it87_data *data = dev_get_drvdata(dev);
 862         long val;
 863         u8 reg;
 864
 865         /* This check can go away if we ever support automatic fan speed
 866            control on newer chips. */
 867         if (!has_old_autopwm(data)) {
 868                 dev_notice(dev, "Mapping change disabled for safety reasons\n");
 869                 return -EINVAL;
 870         }
 871
 872         if (strict_strtol(buf, 10, &val) < 0)
 873                 return -EINVAL;
 874
 875         switch (val) {
 876         case (1 << 0):
 877                 reg = 0x00;
 878                 break;
 879         case (1 << 1):
 880                 reg = 0x01;
 881                 break;
 882         case (1 << 2):
 883                 reg = 0x02;
 884                 break;
 885         default:
 886                 return -EINVAL;
 887         }
 888
 889         mutex_lock(&data->update_lock);
 890         data->pwm_temp_map[nr] = reg;
 891         /* If we are in automatic mode, write the temp mapping immediately;
 892          * otherwise, just store it for later use. */
 893         if (data->pwm_ctrl[nr] & 0x80) {
 894                 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
 895                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
 896         }
 897         mutex_unlock(&data->update_lock);
 898         return count;
 899 }
 900
 901 static ssize_t show_auto_pwm(struct device *dev,
 902                 struct device_attribute *attr, char *buf)
 903 {
 904         struct it87_data *data = it87_update_device(dev);
 905         struct sensor_device_attribute_2 *sensor_attr =
 906                         to_sensor_dev_attr_2(attr);
 907         int nr = sensor_attr->nr;
 908         int point = sensor_attr->index;
 909
 910         return sprintf(buf, "%d\n", PWM_FROM_REG(data->auto_pwm[nr][point]));
 911 }
 912
 913 static ssize_t set_auto_pwm(struct device *dev,
 914                 struct device_attribute *attr, const char *buf, size_t count)
 915 {
 916         struct it87_data *data = dev_get_drvdata(dev);
 917         struct sensor_device_attribute_2 *sensor_attr =
 918                         to_sensor_dev_attr_2(attr);
 919         int nr = sensor_attr->nr;
 920         int point = sensor_attr->index;
 921         long val;
 922
 923         if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
 924                 return -EINVAL;
 925
 926         mutex_lock(&data->update_lock);
 927         data->auto_pwm[nr][point] = PWM_TO_REG(val);
 928         it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
 929                          data->auto_pwm[nr][point]);
 930         mutex_unlock(&data->update_lock);
 931         return count;
 932 }
 933
 934 static ssize_t show_auto_temp(struct device *dev,
 935                 struct device_attribute *attr, char *buf)
 936 {
 937         struct it87_data *data = it87_update_device(dev);
 938         struct sensor_device_attribute_2 *sensor_attr =
 939                         to_sensor_dev_attr_2(attr);
 940         int nr = sensor_attr->nr;
 941         int point = sensor_attr->index;
 942
 943         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
 944 }
 945
 946 static ssize_t set_auto_temp(struct device *dev,
 947                 struct device_attribute *attr, const char *buf, size_t count)
 948 {
 949         struct it87_data *data = dev_get_drvdata(dev);
 950         struct sensor_device_attribute_2 *sensor_attr =
 951                         to_sensor_dev_attr_2(attr);
 952         int nr = sensor_attr->nr;
 953         int point = sensor_attr->index;
 954         long val;
 955
 956         if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
 957                 return -EINVAL;
 958
 959         mutex_lock(&data->update_lock);
 960         data->auto_temp[nr][point] = TEMP_TO_REG(val);
 961         it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
 962                          data->auto_temp[nr][point]);
 963         mutex_unlock(&data->update_lock);
 964         return count;
 965 }
 966
 967 #define show_fan_offset(offset)                                 \
 968 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,         \
 969                 show_fan, NULL, offset - 1);                    \
 970 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
 971                 show_fan_min, set_fan_min, offset - 1);         \
 972 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
 973                 show_fan_div, set_fan_div, offset - 1);
 974
 975 show_fan_offset(1);
 976 show_fan_offset(2);
 977 show_fan_offset(3);
 978
 979 #define show_pwm_offset(offset)                                         \
 980 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR,      \
 981                 show_pwm_enable, set_pwm_enable, offset - 1);           \
 982 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,               \
 983                 show_pwm, set_pwm, offset - 1);                         \
 984 static DEVICE_ATTR(pwm##offset##_freq,                                  \
 985                 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO),            \
 986                 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL));    \
 987 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp,             \
 988                 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
 989                 offset - 1);                                            \
 990 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm,              \
 991                 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,         \
 992                 offset - 1, 0);                                         \
 993 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm,              \
 994                 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,         \
 995                 offset - 1, 1);                                         \
 996 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm,              \
 997                 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,         \
 998                 offset - 1, 2);                                         \
 999 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm,              \
1000                 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3);           \
1001 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp,             \
1002                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1003                 offset - 1, 1);                                         \
1004 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst,        \
1005                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1006                 offset - 1, 0);                                         \
1007 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp,             \
1008                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1009                 offset - 1, 2);                                         \
1010 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp,             \
1011                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1012                 offset - 1, 3);                                         \
1013 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp,             \
1014                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1015                 offset - 1, 4);
1016
1017 show_pwm_offset(1);
1018 show_pwm_offset(2);
1019 show_pwm_offset(3);
1020
1021 /* A different set of callbacks for 16-bit fans */
1022 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
1023                 char *buf)
1024 {
1025         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1026         int nr = sensor_attr->index;
1027         struct it87_data *data = it87_update_device(dev);
1028         return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
1029 }
1030
1031 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
1032                 char *buf)
1033 {
1034         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1035         int nr = sensor_attr->index;
1036         struct it87_data *data = it87_update_device(dev);
1037         return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
1038 }
1039
1040 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
1041                 const char *buf, size_t count)
1042 {
1043         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1044         int nr = sensor_attr->index;
1045         struct it87_data *data = dev_get_drvdata(dev);
1046         long val;
1047
1048         if (strict_strtol(buf, 10, &val) < 0)
1049                 return -EINVAL;
1050
1051         mutex_lock(&data->update_lock);
1052         data->fan_min[nr] = FAN16_TO_REG(val);
1053         it87_write_value(data, IT87_REG_FAN_MIN[nr],
1054                          data->fan_min[nr] & 0xff);
1055         it87_write_value(data, IT87_REG_FANX_MIN[nr],
1056                          data->fan_min[nr] >> 8);
1057         mutex_unlock(&data->update_lock);
1058         return count;
1059 }
1060
1061 /* We want to use the same sysfs file names as 8-bit fans, but we need
1062    different variable names, so we have to use SENSOR_ATTR instead of
1063    SENSOR_DEVICE_ATTR. */
1064 #define show_fan16_offset(offset) \
1065 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
1066         = SENSOR_ATTR(fan##offset##_input, S_IRUGO,             \
1067                 show_fan16, NULL, offset - 1);                  \
1068 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
1069         = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,     \
1070                 show_fan16_min, set_fan16_min, offset - 1)
1071
1072 show_fan16_offset(1);
1073 show_fan16_offset(2);
1074 show_fan16_offset(3);
1075 show_fan16_offset(4);
1076 show_fan16_offset(5);
1077
1078 /* Alarms */
1079 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1080                 char *buf)
1081 {
1082         struct it87_data *data = it87_update_device(dev);
1083         return sprintf(buf, "%u\n", data->alarms);
1084 }
1085 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1086
1087 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1088                 char *buf)
1089 {
1090         int bitnr = to_sensor_dev_attr(attr)->index;
1091         struct it87_data *data = it87_update_device(dev);
1092         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1093 }
1094 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1095 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1096 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1097 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1098 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1099 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1100 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1101 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1102 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1103 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1104 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1105 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1106 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1107 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1108 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1109 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1110
1111 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1112                 char *buf)
1113 {
1114         int bitnr = to_sensor_dev_attr(attr)->index;
1115         struct it87_data *data = it87_update_device(dev);
1116         return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1117 }
1118 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1119                 const char *buf, size_t count)
1120 {
1121         int bitnr = to_sensor_dev_attr(attr)->index;
1122         struct it87_data *data = dev_get_drvdata(dev);
1123         long val;
1124
1125         if (strict_strtol(buf, 10, &val) < 0
1126          || (val != 0 && val != 1))
1127                 return -EINVAL;
1128
1129         mutex_lock(&data->update_lock);
1130         data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1131         if (val)
1132                 data->beeps |= (1 << bitnr);
1133         else
1134                 data->beeps &= ~(1 << bitnr);
1135         it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1136         mutex_unlock(&data->update_lock);
1137         return count;
1138 }
1139
1140 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1141                           show_beep, set_beep, 1);
1142 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1143 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1144 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1145 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1146 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1147 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1148 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1149 /* fanX_beep writability is set later */
1150 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1151 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1152 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1153 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1154 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1155 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1156                           show_beep, set_beep, 2);
1157 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1158 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1159
1160 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1161                 char *buf)
1162 {
1163         struct it87_data *data = dev_get_drvdata(dev);
1164         return sprintf(buf, "%u\n", data->vrm);
1165 }
1166 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1167                 const char *buf, size_t count)
1168 {
1169         struct it87_data *data = dev_get_drvdata(dev);
1170         unsigned long val;
1171
1172         if (strict_strtoul(buf, 10, &val) < 0)
1173                 return -EINVAL;
1174
1175         data->vrm = val;
1176
1177         return count;
1178 }
1179 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1180
1181 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1182                 char *buf)
1183 {
1184         struct it87_data *data = it87_update_device(dev);
1185         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1186 }
1187 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1188
1189 static ssize_t show_name(struct device *dev, struct device_attribute
1190                          *devattr, char *buf)
1191 {
1192         struct it87_data *data = dev_get_drvdata(dev);
1193         return sprintf(buf, "%s\n", data->name);
1194 }
1195 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1196
1197 static struct attribute *it87_attributes[] = {
1198         &sensor_dev_attr_in0_input.dev_attr.attr,
1199         &sensor_dev_attr_in1_input.dev_attr.attr,
1200         &sensor_dev_attr_in2_input.dev_attr.attr,
1201         &sensor_dev_attr_in3_input.dev_attr.attr,
1202         &sensor_dev_attr_in4_input.dev_attr.attr,
1203         &sensor_dev_attr_in5_input.dev_attr.attr,
1204         &sensor_dev_attr_in6_input.dev_attr.attr,
1205         &sensor_dev_attr_in7_input.dev_attr.attr,
1206         &sensor_dev_attr_in8_input.dev_attr.attr,
1207         &sensor_dev_attr_in0_min.dev_attr.attr,
1208         &sensor_dev_attr_in1_min.dev_attr.attr,
1209         &sensor_dev_attr_in2_min.dev_attr.attr,
1210         &sensor_dev_attr_in3_min.dev_attr.attr,
1211         &sensor_dev_attr_in4_min.dev_attr.attr,
1212         &sensor_dev_attr_in5_min.dev_attr.attr,
1213         &sensor_dev_attr_in6_min.dev_attr.attr,
1214         &sensor_dev_attr_in7_min.dev_attr.attr,
1215         &sensor_dev_attr_in0_max.dev_attr.attr,
1216         &sensor_dev_attr_in1_max.dev_attr.attr,
1217         &sensor_dev_attr_in2_max.dev_attr.attr,
1218         &sensor_dev_attr_in3_max.dev_attr.attr,
1219         &sensor_dev_attr_in4_max.dev_attr.attr,
1220         &sensor_dev_attr_in5_max.dev_attr.attr,
1221         &sensor_dev_attr_in6_max.dev_attr.attr,
1222         &sensor_dev_attr_in7_max.dev_attr.attr,
1223         &sensor_dev_attr_in0_alarm.dev_attr.attr,
1224         &sensor_dev_attr_in1_alarm.dev_attr.attr,
1225         &sensor_dev_attr_in2_alarm.dev_attr.attr,
1226         &sensor_dev_attr_in3_alarm.dev_attr.attr,
1227         &sensor_dev_attr_in4_alarm.dev_attr.attr,
1228         &sensor_dev_attr_in5_alarm.dev_attr.attr,
1229         &sensor_dev_attr_in6_alarm.dev_attr.attr,
1230         &sensor_dev_attr_in7_alarm.dev_attr.attr,
1231
1232         &sensor_dev_attr_temp1_input.dev_attr.attr,
1233         &sensor_dev_attr_temp2_input.dev_attr.attr,
1234         &sensor_dev_attr_temp3_input.dev_attr.attr,
1235         &sensor_dev_attr_temp1_max.dev_attr.attr,
1236         &sensor_dev_attr_temp2_max.dev_attr.attr,
1237         &sensor_dev_attr_temp3_max.dev_attr.attr,
1238         &sensor_dev_attr_temp1_min.dev_attr.attr,
1239         &sensor_dev_attr_temp2_min.dev_attr.attr,
1240         &sensor_dev_attr_temp3_min.dev_attr.attr,
1241         &sensor_dev_attr_temp1_type.dev_attr.attr,
1242         &sensor_dev_attr_temp2_type.dev_attr.attr,
1243         &sensor_dev_attr_temp3_type.dev_attr.attr,
1244         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1245         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1246         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1247
1248         &dev_attr_alarms.attr,
1249         &dev_attr_name.attr,
1250         NULL
1251 };
1252
1253 static const struct attribute_group it87_group = {
1254         .attrs = it87_attributes,
1255 };
1256
1257 static struct attribute *it87_attributes_beep[] = {
1258         &sensor_dev_attr_in0_beep.dev_attr.attr,
1259         &sensor_dev_attr_in1_beep.dev_attr.attr,
1260         &sensor_dev_attr_in2_beep.dev_attr.attr,
1261         &sensor_dev_attr_in3_beep.dev_attr.attr,
1262         &sensor_dev_attr_in4_beep.dev_attr.attr,
1263         &sensor_dev_attr_in5_beep.dev_attr.attr,
1264         &sensor_dev_attr_in6_beep.dev_attr.attr,
1265         &sensor_dev_attr_in7_beep.dev_attr.attr,
1266
1267         &sensor_dev_attr_temp1_beep.dev_attr.attr,
1268         &sensor_dev_attr_temp2_beep.dev_attr.attr,
1269         &sensor_dev_attr_temp3_beep.dev_attr.attr,
1270         NULL
1271 };
1272
1273 static const struct attribute_group it87_group_beep = {
1274         .attrs = it87_attributes_beep,
1275 };
1276
1277 static struct attribute *it87_attributes_fan16[5][3+1] = { {
1278         &sensor_dev_attr_fan1_input16.dev_attr.attr,
1279         &sensor_dev_attr_fan1_min16.dev_attr.attr,
1280         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1281         NULL
1282 }, {
1283         &sensor_dev_attr_fan2_input16.dev_attr.attr,
1284         &sensor_dev_attr_fan2_min16.dev_attr.attr,
1285         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1286         NULL
1287 }, {
1288         &sensor_dev_attr_fan3_input16.dev_attr.attr,
1289         &sensor_dev_attr_fan3_min16.dev_attr.attr,
1290         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1291         NULL
1292 }, {
1293         &sensor_dev_attr_fan4_input16.dev_attr.attr,
1294         &sensor_dev_attr_fan4_min16.dev_attr.attr,
1295         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1296         NULL
1297 }, {
1298         &sensor_dev_attr_fan5_input16.dev_attr.attr,
1299         &sensor_dev_attr_fan5_min16.dev_attr.attr,
1300         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1301         NULL
1302 } };
1303
1304 static const struct attribute_group it87_group_fan16[5] = {
1305         { .attrs = it87_attributes_fan16[0] },
1306         { .attrs = it87_attributes_fan16[1] },
1307         { .attrs = it87_attributes_fan16[2] },
1308         { .attrs = it87_attributes_fan16[3] },
1309         { .attrs = it87_attributes_fan16[4] },
1310 };
1311
1312 static struct attribute *it87_attributes_fan[3][4+1] = { {
1313         &sensor_dev_attr_fan1_input.dev_attr.attr,
1314         &sensor_dev_attr_fan1_min.dev_attr.attr,
1315         &sensor_dev_attr_fan1_div.dev_attr.attr,
1316         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1317         NULL
1318 }, {
1319         &sensor_dev_attr_fan2_input.dev_attr.attr,
1320         &sensor_dev_attr_fan2_min.dev_attr.attr,
1321         &sensor_dev_attr_fan2_div.dev_attr.attr,
1322         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1323         NULL
1324 }, {
1325         &sensor_dev_attr_fan3_input.dev_attr.attr,
1326         &sensor_dev_attr_fan3_min.dev_attr.attr,
1327         &sensor_dev_attr_fan3_div.dev_attr.attr,
1328         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1329         NULL
1330 } };
1331
1332 static const struct attribute_group it87_group_fan[3] = {
1333         { .attrs = it87_attributes_fan[0] },
1334         { .attrs = it87_attributes_fan[1] },
1335         { .attrs = it87_attributes_fan[2] },
1336 };
1337
1338 static const struct attribute_group *
1339 it87_get_fan_group(const struct it87_data *data)
1340 {
1341         return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
1342 }
1343
1344 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1345         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1346         &sensor_dev_attr_pwm1.dev_attr.attr,
1347         &dev_attr_pwm1_freq.attr,
1348         &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1349         NULL
1350 }, {
1351         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1352         &sensor_dev_attr_pwm2.dev_attr.attr,
1353         &dev_attr_pwm2_freq.attr,
1354         &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1355         NULL
1356 }, {
1357         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1358         &sensor_dev_attr_pwm3.dev_attr.attr,
1359         &dev_attr_pwm3_freq.attr,
1360         &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1361         NULL
1362 } };
1363
1364 static const struct attribute_group it87_group_pwm[3] = {
1365         { .attrs = it87_attributes_pwm[0] },
1366         { .attrs = it87_attributes_pwm[1] },
1367         { .attrs = it87_attributes_pwm[2] },
1368 };
1369
1370 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1371         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1372         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1373         &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1374         &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1375         &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1376         &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1377         &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1378         &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1379         &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1380         NULL
1381 }, {
1382         &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1383         &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1384         &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1385         &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1386         &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1387         &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1388         &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1389         &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1390         &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1391         NULL
1392 }, {
1393         &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1394         &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1395         &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1396         &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1397         &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1398         &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1399         &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1400         &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1401         &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1402         NULL
1403 } };
1404
1405 static const struct attribute_group it87_group_autopwm[3] = {
1406         { .attrs = it87_attributes_autopwm[0] },
1407         { .attrs = it87_attributes_autopwm[1] },
1408         { .attrs = it87_attributes_autopwm[2] },
1409 };
1410
1411 static struct attribute *it87_attributes_fan_beep[] = {
1412         &sensor_dev_attr_fan1_beep.dev_attr.attr,
1413         &sensor_dev_attr_fan2_beep.dev_attr.attr,
1414         &sensor_dev_attr_fan3_beep.dev_attr.attr,
1415         &sensor_dev_attr_fan4_beep.dev_attr.attr,
1416         &sensor_dev_attr_fan5_beep.dev_attr.attr,
1417 };
1418
1419 static struct attribute *it87_attributes_vid[] = {
1420         &dev_attr_vrm.attr,
1421         &dev_attr_cpu0_vid.attr,
1422         NULL
1423 };
1424
1425 static const struct attribute_group it87_group_vid = {
1426         .attrs = it87_attributes_vid,
1427 };
1428
1429 /* SuperIO detection - will change isa_address if a chip is found */
1430 static int __init it87_find(unsigned short *address,
1431         struct it87_sio_data *sio_data)
1432 {
1433         int err = -ENODEV;
1434         u16 chip_type;
1435         const char *board_vendor, *board_name;
1436
1437         superio_enter();
1438         chip_type = force_id ? force_id : superio_inw(DEVID);
1439
1440         switch (chip_type) {
1441         case IT8705F_DEVID:
1442                 sio_data->type = it87;
1443                 break;
1444         case IT8712F_DEVID:
1445                 sio_data->type = it8712;
1446                 break;
1447         case IT8716F_DEVID:
1448         case IT8726F_DEVID:
1449                 sio_data->type = it8716;
1450                 break;
1451         case IT8718F_DEVID:
1452                 sio_data->type = it8718;
1453                 break;
1454         case IT8720F_DEVID:
1455                 sio_data->type = it8720;
1456                 break;
1457         case 0xffff:    /* No device at all */
1458                 goto exit;
1459         default:
1460                 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n",
1461                          chip_type);
1462                 goto exit;
1463         }
1464
1465         superio_select(PME);
1466         if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1467                 pr_info("it87: Device not activated, skipping\n");
1468                 goto exit;
1469         }
1470
1471         *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1472         if (*address == 0) {
1473                 pr_info("it87: Base address not set, skipping\n");
1474                 goto exit;
1475         }
1476
1477         err = 0;
1478         sio_data->revision = superio_inb(DEVREV) & 0x0f;
1479         pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
1480                 chip_type, *address, sio_data->revision);
1481
1482         /* Read GPIO config and VID value from LDN 7 (GPIO) */
1483         if (sio_data->type == it87) {
1484                 /* The IT8705F doesn't have VID pins at all */
1485                 sio_data->skip_vid = 1;
1486
1487                 /* The IT8705F has a different LD number for GPIO */
1488                 superio_select(5);
1489                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1490         } else {
1491                 int reg;
1492
1493                 superio_select(GPIO);
1494                 /* We need at least 4 VID pins */
1495                 reg = superio_inb(IT87_SIO_GPIO3_REG);
1496                 if (reg & 0x0f) {
1497                         pr_info("it87: VID is disabled (pins used for GPIO)\n");
1498                         sio_data->skip_vid = 1;
1499                 }
1500
1501                 /* Check if fan3 is there or not */
1502                 if (reg & (1 << 6))
1503                         sio_data->skip_pwm |= (1 << 2);
1504                 if (reg & (1 << 7))
1505                         sio_data->skip_fan |= (1 << 2);
1506
1507                 /* Check if fan2 is there or not */
1508                 reg = superio_inb(IT87_SIO_GPIO5_REG);
1509                 if (reg & (1 << 1))
1510                         sio_data->skip_pwm |= (1 << 1);
1511                 if (reg & (1 << 2))
1512                         sio_data->skip_fan |= (1 << 1);
1513
1514                 if ((sio_data->type == it8718 || sio_data->type == it8720)
1515                  && !(sio_data->skip_vid))
1516                         sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1517
1518                 reg = superio_inb(IT87_SIO_PINX2_REG);
1519                 if (reg & (1 << 0))
1520                         pr_info("it87: in3 is VCC (+5V)\n");
1521                 if (reg & (1 << 1))
1522                         pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
1523
1524                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1525         }
1526         if (sio_data->beep_pin)
1527                 pr_info("it87: Beeping is supported\n");
1528
1529         /* Disable specific features based on DMI strings */
1530         board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1531         board_name = dmi_get_system_info(DMI_BOARD_NAME);
1532         if (board_vendor && board_name) {
1533                 if (strcmp(board_vendor, "nVIDIA") == 0
1534                  && strcmp(board_name, "FN68PT") == 0) {
1535                         /* On the Shuttle SN68PT, FAN_CTL2 is apparently not
1536                            connected to a fan, but to something else. One user
1537                            has reported instant system power-off when changing
1538                            the PWM2 duty cycle, so we disable it.
1539                            I use the board name string as the trigger in case
1540                            the same board is ever used in other systems. */
1541                         pr_info("it87: Disabling pwm2 due to "
1542                                 "hardware constraints\n");
1543                         sio_data->skip_pwm = (1 << 1);
1544                 }
1545         }
1546
1547 exit:
1548         superio_exit();
1549         return err;
1550 }
1551
1552 static void it87_remove_files(struct device *dev)
1553 {
1554         struct it87_data *data = platform_get_drvdata(pdev);
1555         struct it87_sio_data *sio_data = dev->platform_data;
1556         const struct attribute_group *fan_group = it87_get_fan_group(data);
1557         int i;
1558
1559         sysfs_remove_group(&dev->kobj, &it87_group);
1560         if (sio_data->beep_pin)
1561                 sysfs_remove_group(&dev->kobj, &it87_group_beep);
1562         for (i = 0; i < 5; i++) {
1563                 if (!(data->has_fan & (1 << i)))
1564                         continue;
1565                 sysfs_remove_group(&dev->kobj, &fan_group[i]);
1566                 if (sio_data->beep_pin)
1567                         sysfs_remove_file(&dev->kobj,
1568                                           it87_attributes_fan_beep[i]);
1569         }
1570         for (i = 0; i < 3; i++) {
1571                 if (sio_data->skip_pwm & (1 << 0))
1572                         continue;
1573                 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1574                 if (has_old_autopwm(data))
1575                         sysfs_remove_group(&dev->kobj,
1576                                            &it87_group_autopwm[i]);
1577         }
1578         if (!sio_data->skip_vid)
1579                 sysfs_remove_group(&dev->kobj, &it87_group_vid);
1580 }
1581
1582 static int __devinit it87_probe(struct platform_device *pdev)
1583 {
1584         struct it87_data *data;
1585         struct resource *res;
1586         struct device *dev = &pdev->dev;
1587         struct it87_sio_data *sio_data = dev->platform_data;
1588         const struct attribute_group *fan_group;
1589         int err = 0, i;
1590         int enable_pwm_interface;
1591         int fan_beep_need_rw;
1592         static const char *names[] = {
1593                 "it87",
1594                 "it8712",
1595                 "it8716",
1596                 "it8718",
1597                 "it8720",
1598         };
1599
1600         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1601         if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
1602                 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1603                         (unsigned long)res->start,
1604                         (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1605                 err = -EBUSY;
1606                 goto ERROR0;
1607         }
1608
1609         data = kzalloc(sizeof(struct it87_data), GFP_KERNEL);
1610         if (!data) {
1611                 err = -ENOMEM;
1612                 goto ERROR1;
1613         }
1614
1615         data->addr = res->start;
1616         data->type = sio_data->type;
1617         data->revision = sio_data->revision;
1618         data->name = names[sio_data->type];
1619
1620         /* Now, we do the remaining detection. */
1621         if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1622          || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
1623                 err = -ENODEV;
1624                 goto ERROR2;
1625         }
1626
1627         platform_set_drvdata(pdev, data);
1628
1629         mutex_init(&data->update_lock);
1630
1631         /* Check PWM configuration */
1632         enable_pwm_interface = it87_check_pwm(dev);
1633
1634         /* Initialize the IT87 chip */
1635         it87_init_device(pdev);
1636
1637         /* Register sysfs hooks */
1638         err = sysfs_create_group(&dev->kobj, &it87_group);
1639         if (err)
1640                 goto ERROR2;
1641
1642         if (sio_data->beep_pin) {
1643                 err = sysfs_create_group(&dev->kobj, &it87_group_beep);
1644                 if (err)
1645                         goto ERROR4;
1646         }
1647
1648         /* Do not create fan files for disabled fans */
1649         fan_group = it87_get_fan_group(data);
1650         fan_beep_need_rw = 1;
1651         for (i = 0; i < 5; i++) {
1652                 if (!(data->has_fan & (1 << i)))
1653                         continue;
1654                 err = sysfs_create_group(&dev->kobj, &fan_group[i]);
1655                 if (err)
1656                         goto ERROR4;
1657
1658                 if (sio_data->beep_pin) {
1659                         err = sysfs_create_file(&dev->kobj,
1660                                                 it87_attributes_fan_beep[i]);
1661                         if (err)
1662                                 goto ERROR4;
1663                         if (!fan_beep_need_rw)
1664                                 continue;
1665
1666                         /* As we have a single beep enable bit for all fans,
1667                          * only the first enabled fan has a writable attribute
1668                          * for it. */
1669                         if (sysfs_chmod_file(&dev->kobj,
1670                                              it87_attributes_fan_beep[i],
1671                                              S_IRUGO | S_IWUSR))
1672                                 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
1673                                         i + 1);
1674                         fan_beep_need_rw = 0;
1675                 }
1676         }
1677
1678         if (enable_pwm_interface) {
1679                 for (i = 0; i < 3; i++) {
1680                         if (sio_data->skip_pwm & (1 << i))
1681                                 continue;
1682                         err = sysfs_create_group(&dev->kobj,
1683                                                  &it87_group_pwm[i]);
1684                         if (err)
1685                                 goto ERROR4;
1686
1687                         if (!has_old_autopwm(data))
1688                                 continue;
1689                         err = sysfs_create_group(&dev->kobj,
1690                                                  &it87_group_autopwm[i]);
1691                         if (err)
1692                                 goto ERROR4;
1693                 }
1694         }
1695
1696         if (!sio_data->skip_vid) {
1697                 data->vrm = vid_which_vrm();
1698                 /* VID reading from Super-I/O config space if available */
1699                 data->vid = sio_data->vid_value;
1700                 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
1701                 if (err)
1702                         goto ERROR4;
1703         }
1704
1705         data->hwmon_dev = hwmon_device_register(dev);
1706         if (IS_ERR(data->hwmon_dev)) {
1707                 err = PTR_ERR(data->hwmon_dev);
1708                 goto ERROR4;
1709         }
1710
1711         return 0;
1712
1713 ERROR4:
1714         it87_remove_files(dev);
1715 ERROR2:
1716         platform_set_drvdata(pdev, NULL);
1717         kfree(data);
1718 ERROR1:
1719         release_region(res->start, IT87_EC_EXTENT);
1720 ERROR0:
1721         return err;
1722 }
1723
1724 static int __devexit it87_remove(struct platform_device *pdev)
1725 {
1726         struct it87_data *data = platform_get_drvdata(pdev);
1727
1728         hwmon_device_unregister(data->hwmon_dev);
1729         it87_remove_files(&pdev->dev);
1730
1731         release_region(data->addr, IT87_EC_EXTENT);
1732         platform_set_drvdata(pdev, NULL);
1733         kfree(data);
1734
1735         return 0;
1736 }
1737
1738 /* Must be called with data->update_lock held, except during initialization.
1739    We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1740    would slow down the IT87 access and should not be necessary. */
1741 static int it87_read_value(struct it87_data *data, u8 reg)
1742 {
1743         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1744         return inb_p(data->addr + IT87_DATA_REG_OFFSET);
1745 }
1746
1747 /* Must be called with data->update_lock held, except during initialization.
1748    We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1749    would slow down the IT87 access and should not be necessary. */
1750 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
1751 {
1752         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1753         outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
1754 }
1755
1756 /* Return 1 if and only if the PWM interface is safe to use */
1757 static int __devinit it87_check_pwm(struct device *dev)
1758 {
1759         struct it87_data *data = dev_get_drvdata(dev);
1760         /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
1761          * and polarity set to active low is sign that this is the case so we
1762          * disable pwm control to protect the user. */
1763         int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1764         if ((tmp & 0x87) == 0) {
1765                 if (fix_pwm_polarity) {
1766                         /* The user asks us to attempt a chip reconfiguration.
1767                          * This means switching to active high polarity and
1768                          * inverting all fan speed values. */
1769                         int i;
1770                         u8 pwm[3];
1771
1772                         for (i = 0; i < 3; i++)
1773                                 pwm[i] = it87_read_value(data,
1774                                                          IT87_REG_PWM(i));
1775
1776                         /* If any fan is in automatic pwm mode, the polarity
1777                          * might be correct, as suspicious as it seems, so we
1778                          * better don't change anything (but still disable the
1779                          * PWM interface). */
1780                         if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
1781                                 dev_info(dev, "Reconfiguring PWM to "
1782                                          "active high polarity\n");
1783                                 it87_write_value(data, IT87_REG_FAN_CTL,
1784                                                  tmp | 0x87);
1785                                 for (i = 0; i < 3; i++)
1786                                         it87_write_value(data,
1787                                                          IT87_REG_PWM(i),
1788                                                          0x7f & ~pwm[i]);
1789                                 return 1;
1790                         }
1791
1792                         dev_info(dev, "PWM configuration is "
1793                                  "too broken to be fixed\n");
1794                 }
1795
1796                 dev_info(dev, "Detected broken BIOS "
1797                          "defaults, disabling PWM interface\n");
1798                 return 0;
1799         } else if (fix_pwm_polarity) {
1800                 dev_info(dev, "PWM configuration looks "
1801                          "sane, won't touch\n");
1802         }
1803
1804         return 1;
1805 }
1806
1807 /* Called when we have found a new IT87. */
1808 static void __devinit it87_init_device(struct platform_device *pdev)
1809 {
1810         struct it87_sio_data *sio_data = pdev->dev.platform_data;
1811         struct it87_data *data = platform_get_drvdata(pdev);
1812         int tmp, i;
1813         u8 mask;
1814
1815         /* For each PWM channel:
1816          * - If it is in automatic mode, setting to manual mode should set
1817          *   the fan to full speed by default.
1818          * - If it is in manual mode, we need a mapping to temperature
1819          *   channels to use when later setting to automatic mode later.
1820          *   Use a 1:1 mapping by default (we are clueless.)
1821          * In both cases, the value can (and should) be changed by the user
1822          * prior to switching to a different mode. */
1823         for (i = 0; i < 3; i++) {
1824                 data->pwm_temp_map[i] = i;
1825                 data->pwm_duty[i] = 0x7f;       /* Full speed */
1826                 data->auto_pwm[i][3] = 0x7f;    /* Full speed, hard-coded */
1827         }
1828
1829         /* Some chips seem to have default value 0xff for all limit
1830          * registers. For low voltage limits it makes no sense and triggers
1831          * alarms, so change to 0 instead. For high temperature limits, it
1832          * means -1 degree C, which surprisingly doesn't trigger an alarm,
1833          * but is still confusing, so change to 127 degrees C. */
1834         for (i = 0; i < 8; i++) {
1835                 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
1836                 if (tmp == 0xff)
1837                         it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
1838         }
1839         for (i = 0; i < 3; i++) {
1840                 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1841                 if (tmp == 0xff)
1842                         it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
1843         }
1844
1845         /* Temperature channels are not forcibly enabled, as they can be
1846          * set to two different sensor types and we can't guess which one
1847          * is correct for a given system. These channels can be enabled at
1848          * run-time through the temp{1-3}_type sysfs accessors if needed. */
1849
1850         /* Check if voltage monitors are reset manually or by some reason */
1851         tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
1852         if ((tmp & 0xff) == 0) {
1853                 /* Enable all voltage monitors */
1854                 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
1855         }
1856
1857         /* Check if tachometers are reset manually or by some reason */
1858         mask = 0x70 & ~(sio_data->skip_fan << 4);
1859         data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
1860         if ((data->fan_main_ctrl & mask) == 0) {
1861                 /* Enable all fan tachometers */
1862                 data->fan_main_ctrl |= mask;
1863                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1864                                  data->fan_main_ctrl);
1865         }
1866         data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
1867
1868         /* Set tachometers to 16-bit mode if needed */
1869         if (has_16bit_fans(data)) {
1870                 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
1871                 if (~tmp & 0x07 & data->has_fan) {
1872                         dev_dbg(&pdev->dev,
1873                                 "Setting fan1-3 to 16-bit mode\n");
1874                         it87_write_value(data, IT87_REG_FAN_16BIT,
1875                                          tmp | 0x07);
1876                 }
1877                 /* IT8705F only supports three fans. */
1878                 if (data->type != it87) {
1879                         if (tmp & (1 << 4))
1880                                 data->has_fan |= (1 << 3); /* fan4 enabled */
1881                         if (tmp & (1 << 5))
1882                                 data->has_fan |= (1 << 4); /* fan5 enabled */
1883                 }
1884         }
1885
1886         /* Fan input pins may be used for alternative functions */
1887         data->has_fan &= ~sio_data->skip_fan;
1888
1889         /* Start monitoring */
1890         it87_write_value(data, IT87_REG_CONFIG,
1891                          (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
1892                          | (update_vbat ? 0x41 : 0x01));
1893 }
1894
1895 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
1896 {
1897         data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
1898         if (data->pwm_ctrl[nr] & 0x80)  /* Automatic mode */
1899                 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
1900         else                            /* Manual mode */
1901                 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
1902
1903         if (has_old_autopwm(data)) {
1904                 int i;
1905
1906                 for (i = 0; i < 5 ; i++)
1907                         data->auto_temp[nr][i] = it87_read_value(data,
1908                                                 IT87_REG_AUTO_TEMP(nr, i));
1909                 for (i = 0; i < 3 ; i++)
1910                         data->auto_pwm[nr][i] = it87_read_value(data,
1911                                                 IT87_REG_AUTO_PWM(nr, i));
1912         }
1913 }
1914
1915 static struct it87_data *it87_update_device(struct device *dev)
1916 {
1917         struct it87_data *data = dev_get_drvdata(dev);
1918         int i;
1919
1920         mutex_lock(&data->update_lock);
1921
1922         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1923             || !data->valid) {
1924                 if (update_vbat) {
1925                         /* Cleared after each update, so reenable.  Value
1926                            returned by this read will be previous value */
1927                         it87_write_value(data, IT87_REG_CONFIG,
1928                                 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
1929                 }
1930                 for (i = 0; i <= 7; i++) {
1931                         data->in[i] =
1932                                 it87_read_value(data, IT87_REG_VIN(i));
1933                         data->in_min[i] =
1934                                 it87_read_value(data, IT87_REG_VIN_MIN(i));
1935                         data->in_max[i] =
1936                                 it87_read_value(data, IT87_REG_VIN_MAX(i));
1937                 }
1938                 /* in8 (battery) has no limit registers */
1939                 data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
1940
1941                 for (i = 0; i < 5; i++) {
1942                         /* Skip disabled fans */
1943                         if (!(data->has_fan & (1 << i)))
1944                                 continue;
1945
1946                         data->fan_min[i] =
1947                                 it87_read_value(data, IT87_REG_FAN_MIN[i]);
1948                         data->fan[i] = it87_read_value(data,
1949                                        IT87_REG_FAN[i]);
1950                         /* Add high byte if in 16-bit mode */
1951                         if (has_16bit_fans(data)) {
1952                                 data->fan[i] |= it87_read_value(data,
1953                                                 IT87_REG_FANX[i]) << 8;
1954                                 data->fan_min[i] |= it87_read_value(data,
1955                                                 IT87_REG_FANX_MIN[i]) << 8;
1956                         }
1957                 }
1958                 for (i = 0; i < 3; i++) {
1959                         data->temp[i] =
1960                                 it87_read_value(data, IT87_REG_TEMP(i));
1961                         data->temp_high[i] =
1962                                 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1963                         data->temp_low[i] =
1964                                 it87_read_value(data, IT87_REG_TEMP_LOW(i));
1965                 }
1966
1967                 /* Newer chips don't have clock dividers */
1968                 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
1969                         i = it87_read_value(data, IT87_REG_FAN_DIV);
1970                         data->fan_div[0] = i & 0x07;
1971                         data->fan_div[1] = (i >> 3) & 0x07;
1972                         data->fan_div[2] = (i & 0x40) ? 3 : 1;
1973                 }
1974
1975                 data->alarms =
1976                         it87_read_value(data, IT87_REG_ALARM1) |
1977                         (it87_read_value(data, IT87_REG_ALARM2) << 8) |
1978                         (it87_read_value(data, IT87_REG_ALARM3) << 16);
1979                 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1980
1981                 data->fan_main_ctrl = it87_read_value(data,
1982                                 IT87_REG_FAN_MAIN_CTRL);
1983                 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
1984                 for (i = 0; i < 3; i++)
1985                         it87_update_pwm_ctrl(data, i);
1986
1987                 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
1988                 /* The 8705 does not have VID capability.
1989                    The 8718 and the 8720 don't use IT87_REG_VID for the
1990                    same purpose. */
1991                 if (data->type == it8712 || data->type == it8716) {
1992                         data->vid = it87_read_value(data, IT87_REG_VID);
1993                         /* The older IT8712F revisions had only 5 VID pins,
1994                            but we assume it is always safe to read 6 bits. */
1995                         data->vid &= 0x3f;
1996                 }
1997                 data->last_updated = jiffies;
1998                 data->valid = 1;
1999         }
2000
2001         mutex_unlock(&data->update_lock);
2002
2003         return data;
2004 }
2005
2006 static int __init it87_device_add(unsigned short address,
2007                                   const struct it87_sio_data *sio_data)
2008 {
2009         struct resource res = {
2010                 .start  = address + IT87_EC_OFFSET,
2011                 .end    = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2012                 .name   = DRVNAME,
2013                 .flags  = IORESOURCE_IO,
2014         };
2015         int err;
2016
2017         err = acpi_check_resource_conflict(&res);
2018         if (err)
2019                 goto exit;
2020
2021         pdev = platform_device_alloc(DRVNAME, address);
2022         if (!pdev) {
2023                 err = -ENOMEM;
2024                 printk(KERN_ERR DRVNAME ": Device allocation failed\n");
2025                 goto exit;
2026         }
2027
2028         err = platform_device_add_resources(pdev, &res, 1);
2029         if (err) {
2030                 printk(KERN_ERR DRVNAME ": Device resource addition failed "
2031                        "(%d)\n", err);
2032                 goto exit_device_put;
2033         }
2034
2035         err = platform_device_add_data(pdev, sio_data,
2036                                        sizeof(struct it87_sio_data));
2037         if (err) {
2038                 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
2039                 goto exit_device_put;
2040         }
2041
2042         err = platform_device_add(pdev);
2043         if (err) {
2044                 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
2045                        err);
2046                 goto exit_device_put;
2047         }
2048
2049         return 0;
2050
2051 exit_device_put:
2052         platform_device_put(pdev);
2053 exit:
2054         return err;
2055 }
2056
2057 static int __init sm_it87_init(void)
2058 {
2059         int err;
2060         unsigned short isa_address = 0;
2061         struct it87_sio_data sio_data;
2062
2063         memset(&sio_data, 0, sizeof(struct it87_sio_data));
2064         err = it87_find(&isa_address, &sio_data);
2065         if (err)
2066                 return err;
2067         err = platform_driver_register(&it87_driver);
2068         if (err)
2069                 return err;
2070
2071         err = it87_device_add(isa_address, &sio_data);
2072         if (err) {
2073                 platform_driver_unregister(&it87_driver);
2074                 return err;
2075         }
2076
2077         return 0;
2078 }
2079
2080 static void __exit sm_it87_exit(void)
2081 {
2082         platform_device_unregister(pdev);
2083         platform_driver_unregister(&it87_driver);
2084 }
2085
2086
2087 MODULE_AUTHOR("Chris Gauthron, "
2088               "Jean Delvare <khali@linux-fr.org>");
2089 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8720F/8726F, SiS950 driver");
2090 module_param(update_vbat, bool, 0);
2091 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2092 module_param(fix_pwm_polarity, bool, 0);
2093 MODULE_PARM_DESC(fix_pwm_polarity,
2094                  "Force PWM polarity to active high (DANGEROUS)");
2095 MODULE_LICENSE("GPL");
2096
2097 module_init(sm_it87_init);
2098 module_exit(sm_it87_exit);