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 inline void
  84 superio_outb(int reg, int val)
  85 {
  86         outb(reg, REG);
  87         outb(val, VAL);
  88 }
  89
  90 static int superio_inw(int reg)
  91 {
  92         int val;
  93         outb(reg++, REG);
  94         val = inb(VAL) << 8;
  95         outb(reg, REG);
  96         val |= inb(VAL);
  97         return val;
  98 }
  99
 100 static inline void
 101 superio_select(int ldn)
 102 {
 103         outb(DEV, REG);
 104         outb(ldn, VAL);
 105 }
 106
 107 static inline void
 108 superio_enter(void)
 109 {
 110         outb(0x87, REG);
 111         outb(0x01, REG);
 112         outb(0x55, REG);
 113         outb(0x55, REG);
 114 }
 115
 116 static inline void
 117 superio_exit(void)
 118 {
 119         outb(0x02, REG);
 120         outb(0x02, VAL);
 121 }
 122
 123 /* Logical device 4 registers */
 124 #define IT8712F_DEVID 0x8712
 125 #define IT8705F_DEVID 0x8705
 126 #define IT8716F_DEVID 0x8716
 127 #define IT8718F_DEVID 0x8718
 128 #define IT8720F_DEVID 0x8720
 129 #define IT8726F_DEVID 0x8726
 130 #define IT87_ACT_REG  0x30
 131 #define IT87_BASE_REG 0x60
 132
 133 /* Logical device 7 registers (IT8712F and later) */
 134 #define IT87_SIO_GPIO3_REG      0x27
 135 #define IT87_SIO_GPIO5_REG      0x29
 136 #define IT87_SIO_PINX2_REG      0x2c    /* Pin selection */
 137 #define IT87_SIO_VID_REG        0xfc    /* VID value */
 138 #define IT87_SIO_BEEP_PIN_REG   0xf6    /* Beep pin mapping */
 139
 140 /* Update battery voltage after every reading if true */
 141 static int update_vbat;
 142
 143 /* Not all BIOSes properly configure the PWM registers */
 144 static int fix_pwm_polarity;
 145
 146 /* Many IT87 constants specified below */
 147
 148 /* Length of ISA address segment */
 149 #define IT87_EXTENT 8
 150
 151 /* Length of ISA address segment for Environmental Controller */
 152 #define IT87_EC_EXTENT 2
 153
 154 /* Offset of EC registers from ISA base address */
 155 #define IT87_EC_OFFSET 5
 156
 157 /* Where are the ISA address/data registers relative to the EC base address */
 158 #define IT87_ADDR_REG_OFFSET 0
 159 #define IT87_DATA_REG_OFFSET 1
 160
 161 /*----- The IT87 registers -----*/
 162
 163 #define IT87_REG_CONFIG        0x00
 164
 165 #define IT87_REG_ALARM1        0x01
 166 #define IT87_REG_ALARM2        0x02
 167 #define IT87_REG_ALARM3        0x03
 168
 169 /* The IT8718F and IT8720F have the VID value in a different register, in
 170    Super-I/O configuration space. */
 171 #define IT87_REG_VID           0x0a
 172 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
 173    for fan divisors. Later IT8712F revisions must use 16-bit tachometer
 174    mode. */
 175 #define IT87_REG_FAN_DIV       0x0b
 176 #define IT87_REG_FAN_16BIT     0x0c
 177
 178 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
 179
 180 static const u8 IT87_REG_FAN[]          = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
 181 static const u8 IT87_REG_FAN_MIN[]      = { 0x10, 0x11, 0x12, 0x84, 0x86 };
 182 static const u8 IT87_REG_FANX[]         = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
 183 static const u8 IT87_REG_FANX_MIN[]     = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
 184 #define IT87_REG_FAN_MAIN_CTRL 0x13
 185 #define IT87_REG_FAN_CTL       0x14
 186 #define IT87_REG_PWM(nr)       (0x15 + (nr))
 187
 188 #define IT87_REG_VIN(nr)       (0x20 + (nr))
 189 #define IT87_REG_TEMP(nr)      (0x29 + (nr))
 190
 191 #define IT87_REG_VIN_MAX(nr)   (0x30 + (nr) * 2)
 192 #define IT87_REG_VIN_MIN(nr)   (0x31 + (nr) * 2)
 193 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
 194 #define IT87_REG_TEMP_LOW(nr)  (0x41 + (nr) * 2)
 195
 196 #define IT87_REG_VIN_ENABLE    0x50
 197 #define IT87_REG_TEMP_ENABLE   0x51
 198 #define IT87_REG_BEEP_ENABLE   0x5c
 199
 200 #define IT87_REG_CHIPID        0x58
 201
 202 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
 203 #define IT87_REG_AUTO_PWM(nr, i)  (0x65 + (nr) * 8 + (i))
 204
 205 #define IN_TO_REG(val)  (SENSORS_LIMIT((((val) + 8)/16),0,255))
 206 #define IN_FROM_REG(val) ((val) * 16)
 207
 208 static inline u8 FAN_TO_REG(long rpm, int div)
 209 {
 210         if (rpm == 0)
 211                 return 255;
 212         rpm = SENSORS_LIMIT(rpm, 1, 1000000);
 213         return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
 214                              254);
 215 }
 216
 217 static inline u16 FAN16_TO_REG(long rpm)
 218 {
 219         if (rpm == 0)
 220                 return 0xffff;
 221         return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
 222 }
 223
 224 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))
 225 /* The divider is fixed to 2 in 16-bit mode */
 226 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2))
 227
 228 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\
 229                                         ((val)+500)/1000),-128,127))
 230 #define TEMP_FROM_REG(val) ((val) * 1000)
 231
 232 #define PWM_TO_REG(val)   ((val) >> 1)
 233 #define PWM_FROM_REG(val) (((val)&0x7f) << 1)
 234
 235 static int DIV_TO_REG(int val)
 236 {
 237         int answer = 0;
 238         while (answer < 7 && (val >>= 1))
 239                 answer++;
 240         return answer;
 241 }
 242 #define DIV_FROM_REG(val) (1 << (val))
 243
 244 static const unsigned int pwm_freq[8] = {
 245         48000000 / 128,
 246         24000000 / 128,
 247         12000000 / 128,
 248         8000000 / 128,
 249         6000000 / 128,
 250         3000000 / 128,
 251         1500000 / 128,
 252         750000 / 128,
 253 };
 254
 255
 256 struct it87_sio_data {
 257         enum chips type;
 258         /* Values read from Super-I/O config space */
 259         u8 revision;
 260         u8 vid_value;
 261         u8 beep_pin;
 262         /* Features skipped based on config or DMI */
 263         u8 skip_vid;
 264         u8 skip_fan;
 265         u8 skip_pwm;
 266 };
 267
 268 /* For each registered chip, we need to keep some data in memory.
 269    The structure is dynamically allocated. */
 270 struct it87_data {
 271         struct device *hwmon_dev;
 272         enum chips type;
 273         u8 revision;
 274
 275         unsigned short addr;
 276         const char *name;
 277         struct mutex update_lock;
 278         char valid;             /* !=0 if following fields are valid */
 279         unsigned long last_updated;     /* In jiffies */
 280
 281         u8 in[9];               /* Register value */
 282         u8 in_max[8];           /* Register value */
 283         u8 in_min[8];           /* Register value */
 284         u8 has_fan;             /* Bitfield, fans enabled */
 285         u16 fan[5];             /* Register values, possibly combined */
 286         u16 fan_min[5];         /* Register values, possibly combined */
 287         s8 temp[3];             /* Register value */
 288         s8 temp_high[3];        /* Register value */
 289         s8 temp_low[3];         /* Register value */
 290         u8 sensor;              /* Register value */
 291         u8 fan_div[3];          /* Register encoding, shifted right */
 292         u8 vid;                 /* Register encoding, combined */
 293         u8 vrm;
 294         u32 alarms;             /* Register encoding, combined */
 295         u8 beeps;               /* Register encoding */
 296         u8 fan_main_ctrl;       /* Register value */
 297         u8 fan_ctl;             /* Register value */
 298
 299         /* The following 3 arrays correspond to the same registers. The
 300          * meaning of bits 6-0 depends on the value of bit 7, and we want
 301          * to preserve settings on mode changes, so we have to track all
 302          * values separately. */
 303         u8 pwm_ctrl[3];         /* Register value */
 304         u8 pwm_duty[3];         /* Manual PWM value set by user (bit 6-0) */
 305         u8 pwm_temp_map[3];     /* PWM to temp. chan. mapping (bits 1-0) */
 306
 307         /* Automatic fan speed control registers */
 308         u8 auto_pwm[3][4];      /* [nr][3] is hard-coded */
 309         s8 auto_temp[3][5];     /* [nr][0] is point1_temp_hyst */
 310 };
 311
 312 static inline int has_16bit_fans(const struct it87_data *data)
 313 {
 314         /* IT8705F Datasheet 0.4.1, 3h == Version G.
 315            IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
 316            These are the first revisions with 16bit tachometer support. */
 317         return (data->type == it87 && data->revision >= 0x03)
 318             || (data->type == it8712 && data->revision >= 0x08)
 319             || data->type == it8716
 320             || data->type == it8718
 321             || data->type == it8720;
 322 }
 323
 324 static inline int has_old_autopwm(const struct it87_data *data)
 325 {
 326         /* The old automatic fan speed control interface is implemented
 327            by IT8705F chips up to revision F and IT8712F chips up to
 328            revision G. */
 329         return (data->type == it87 && data->revision < 0x03)
 330             || (data->type == it8712 && data->revision < 0x08);
 331 }
 332
 333 static int it87_probe(struct platform_device *pdev);
 334 static int __devexit it87_remove(struct platform_device *pdev);
 335
 336 static int it87_read_value(struct it87_data *data, u8 reg);
 337 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
 338 static struct it87_data *it87_update_device(struct device *dev);
 339 static int it87_check_pwm(struct device *dev);
 340 static void it87_init_device(struct platform_device *pdev);
 341
 342
 343 static struct platform_driver it87_driver = {
 344         .driver = {
 345                 .owner  = THIS_MODULE,
 346                 .name   = DRVNAME,
 347         },
 348         .probe  = it87_probe,
 349         .remove = __devexit_p(it87_remove),
 350 };
 351
 352 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 353                 char *buf)
 354 {
 355         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 356         int nr = sensor_attr->index;
 357
 358         struct it87_data *data = it87_update_device(dev);
 359         return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
 360 }
 361
 362 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
 363                 char *buf)
 364 {
 365         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 366         int nr = sensor_attr->index;
 367
 368         struct it87_data *data = it87_update_device(dev);
 369         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
 370 }
 371
 372 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
 373                 char *buf)
 374 {
 375         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 376         int nr = sensor_attr->index;
 377
 378         struct it87_data *data = it87_update_device(dev);
 379         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
 380 }
 381
 382 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 383                 const char *buf, size_t count)
 384 {
 385         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 386         int nr = sensor_attr->index;
 387
 388         struct it87_data *data = dev_get_drvdata(dev);
 389         unsigned long val;
 390
 391         if (strict_strtoul(buf, 10, &val) < 0)
 392                 return -EINVAL;
 393
 394         mutex_lock(&data->update_lock);
 395         data->in_min[nr] = IN_TO_REG(val);
 396         it87_write_value(data, IT87_REG_VIN_MIN(nr),
 397                         data->in_min[nr]);
 398         mutex_unlock(&data->update_lock);
 399         return count;
 400 }
 401 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 402                 const char *buf, size_t count)
 403 {
 404         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 405         int nr = sensor_attr->index;
 406
 407         struct it87_data *data = dev_get_drvdata(dev);
 408         unsigned long val;
 409
 410         if (strict_strtoul(buf, 10, &val) < 0)
 411                 return -EINVAL;
 412
 413         mutex_lock(&data->update_lock);
 414         data->in_max[nr] = IN_TO_REG(val);
 415         it87_write_value(data, IT87_REG_VIN_MAX(nr),
 416                         data->in_max[nr]);
 417         mutex_unlock(&data->update_lock);
 418         return count;
 419 }
 420
 421 #define show_in_offset(offset)                                  \
 422 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,          \
 423                 show_in, NULL, offset);
 424
 425 #define limit_in_offset(offset)                                 \
 426 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,  \
 427                 show_in_min, set_in_min, offset);               \
 428 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,  \
 429                 show_in_max, set_in_max, offset);
 430
 431 show_in_offset(0);
 432 limit_in_offset(0);
 433 show_in_offset(1);
 434 limit_in_offset(1);
 435 show_in_offset(2);
 436 limit_in_offset(2);
 437 show_in_offset(3);
 438 limit_in_offset(3);
 439 show_in_offset(4);
 440 limit_in_offset(4);
 441 show_in_offset(5);
 442 limit_in_offset(5);
 443 show_in_offset(6);
 444 limit_in_offset(6);
 445 show_in_offset(7);
 446 limit_in_offset(7);
 447 show_in_offset(8);
 448
 449 /* 3 temperatures */
 450 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 451                 char *buf)
 452 {
 453         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 454         int nr = sensor_attr->index;
 455
 456         struct it87_data *data = it87_update_device(dev);
 457         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
 458 }
 459 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 460                 char *buf)
 461 {
 462         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 463         int nr = sensor_attr->index;
 464
 465         struct it87_data *data = it87_update_device(dev);
 466         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
 467 }
 468 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
 469                 char *buf)
 470 {
 471         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 472         int nr = sensor_attr->index;
 473
 474         struct it87_data *data = it87_update_device(dev);
 475         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
 476 }
 477 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 478                 const char *buf, size_t count)
 479 {
 480         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 481         int nr = sensor_attr->index;
 482
 483         struct it87_data *data = dev_get_drvdata(dev);
 484         long val;
 485
 486         if (strict_strtol(buf, 10, &val) < 0)
 487                 return -EINVAL;
 488
 489         mutex_lock(&data->update_lock);
 490         data->temp_high[nr] = TEMP_TO_REG(val);
 491         it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
 492         mutex_unlock(&data->update_lock);
 493         return count;
 494 }
 495 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
 496                 const char *buf, size_t count)
 497 {
 498         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 499         int nr = sensor_attr->index;
 500
 501         struct it87_data *data = dev_get_drvdata(dev);
 502         long val;
 503
 504         if (strict_strtol(buf, 10, &val) < 0)
 505                 return -EINVAL;
 506
 507         mutex_lock(&data->update_lock);
 508         data->temp_low[nr] = TEMP_TO_REG(val);
 509         it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
 510         mutex_unlock(&data->update_lock);
 511         return count;
 512 }
 513 #define show_temp_offset(offset)                                        \
 514 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO,                \
 515                 show_temp, NULL, offset - 1);                           \
 516 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,        \
 517                 show_temp_max, set_temp_max, offset - 1);               \
 518 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,        \
 519                 show_temp_min, set_temp_min, offset - 1);
 520
 521 show_temp_offset(1);
 522 show_temp_offset(2);
 523 show_temp_offset(3);
 524
 525 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
 526                 char *buf)
 527 {
 528         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 529         int nr = sensor_attr->index;
 530
 531         struct it87_data *data = it87_update_device(dev);
 532         u8 reg = data->sensor;          /* In case the value is updated while
 533                                            we use it */
 534
 535         if (reg & (1 << nr))
 536                 return sprintf(buf, "3\n");  /* thermal diode */
 537         if (reg & (8 << nr))
 538                 return sprintf(buf, "4\n");  /* thermistor */
 539         return sprintf(buf, "0\n");      /* disabled */
 540 }
 541 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
 542                 const char *buf, size_t count)
 543 {
 544         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 545         int nr = sensor_attr->index;
 546
 547         struct it87_data *data = dev_get_drvdata(dev);
 548         long val;
 549         u8 reg;
 550
 551         if (strict_strtol(buf, 10, &val) < 0)
 552                 return -EINVAL;
 553
 554         reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
 555         reg &= ~(1 << nr);
 556         reg &= ~(8 << nr);
 557         if (val == 2) { /* backwards compatibility */
 558                 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
 559                          "instead\n");
 560                 val = 4;
 561         }
 562         /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
 563         if (val == 3)
 564                 reg |= 1 << nr;
 565         else if (val == 4)
 566                 reg |= 8 << nr;
 567         else if (val != 0)
 568                 return -EINVAL;
 569
 570         mutex_lock(&data->update_lock);
 571         data->sensor = reg;
 572         it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
 573         data->valid = 0;        /* Force cache refresh */
 574         mutex_unlock(&data->update_lock);
 575         return count;
 576 }
 577 #define show_sensor_offset(offset)                                      \
 578 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR,       \
 579                 show_sensor, set_sensor, offset - 1);
 580
 581 show_sensor_offset(1);
 582 show_sensor_offset(2);
 583 show_sensor_offset(3);
 584
 585 /* 3 Fans */
 586
 587 static int pwm_mode(const struct it87_data *data, int nr)
 588 {
 589         int ctrl = data->fan_main_ctrl & (1 << nr);
 590
 591         if (ctrl == 0)                                  /* Full speed */
 592                 return 0;
 593         if (data->pwm_ctrl[nr] & 0x80)                  /* Automatic mode */
 594                 return 2;
 595         else                                            /* Manual mode */
 596                 return 1;
 597 }
 598
 599 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 600                 char *buf)
 601 {
 602         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 603         int nr = sensor_attr->index;
 604
 605         struct it87_data *data = it87_update_device(dev);
 606         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
 607                                 DIV_FROM_REG(data->fan_div[nr])));
 608 }
 609 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
 610                 char *buf)
 611 {
 612         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 613         int nr = sensor_attr->index;
 614
 615         struct it87_data *data = it87_update_device(dev);
 616         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 617                                 DIV_FROM_REG(data->fan_div[nr])));
 618 }
 619 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
 620                 char *buf)
 621 {
 622         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 623         int nr = sensor_attr->index;
 624
 625         struct it87_data *data = it87_update_device(dev);
 626         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 627 }
 628 static ssize_t show_pwm_enable(struct device *dev,
 629                 struct device_attribute *attr, char *buf)
 630 {
 631         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 632         int nr = sensor_attr->index;
 633
 634         struct it87_data *data = it87_update_device(dev);
 635         return sprintf(buf, "%d\n", pwm_mode(data, nr));
 636 }
 637 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 638                 char *buf)
 639 {
 640         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 641         int nr = sensor_attr->index;
 642
 643         struct it87_data *data = it87_update_device(dev);
 644         return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm_duty[nr]));
 645 }
 646 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
 647                 char *buf)
 648 {
 649         struct it87_data *data = it87_update_device(dev);
 650         int index = (data->fan_ctl >> 4) & 0x07;
 651
 652         return sprintf(buf, "%u\n", pwm_freq[index]);
 653 }
 654 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 655                 const char *buf, size_t count)
 656 {
 657         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 658         int nr = sensor_attr->index;
 659
 660         struct it87_data *data = dev_get_drvdata(dev);
 661         long val;
 662         u8 reg;
 663
 664         if (strict_strtol(buf, 10, &val) < 0)
 665                 return -EINVAL;
 666
 667         mutex_lock(&data->update_lock);
 668         reg = it87_read_value(data, IT87_REG_FAN_DIV);
 669         switch (nr) {
 670         case 0:
 671                 data->fan_div[nr] = reg & 0x07;
 672                 break;
 673         case 1:
 674                 data->fan_div[nr] = (reg >> 3) & 0x07;
 675                 break;
 676         case 2:
 677                 data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
 678                 break;
 679         }
 680
 681         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 682         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
 683         mutex_unlock(&data->update_lock);
 684         return count;
 685 }
 686 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 687                 const char *buf, size_t count)
 688 {
 689         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 690         int nr = sensor_attr->index;
 691
 692         struct it87_data *data = dev_get_drvdata(dev);
 693         unsigned long val;
 694         int min;
 695         u8 old;
 696
 697         if (strict_strtoul(buf, 10, &val) < 0)
 698                 return -EINVAL;
 699
 700         mutex_lock(&data->update_lock);
 701         old = it87_read_value(data, IT87_REG_FAN_DIV);
 702
 703         /* Save fan min limit */
 704         min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
 705
 706         switch (nr) {
 707         case 0:
 708         case 1:
 709                 data->fan_div[nr] = DIV_TO_REG(val);
 710                 break;
 711         case 2:
 712                 if (val < 8)
 713                         data->fan_div[nr] = 1;
 714                 else
 715                         data->fan_div[nr] = 3;
 716         }
 717         val = old & 0x80;
 718         val |= (data->fan_div[0] & 0x07);
 719         val |= (data->fan_div[1] & 0x07) << 3;
 720         if (data->fan_div[2] == 3)
 721                 val |= 0x1 << 6;
 722         it87_write_value(data, IT87_REG_FAN_DIV, val);
 723
 724         /* Restore fan min limit */
 725         data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 726         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
 727
 728         mutex_unlock(&data->update_lock);
 729         return count;
 730 }
 731
 732 /* Returns 0 if OK, -EINVAL otherwise */
 733 static int check_trip_points(struct device *dev, int nr)
 734 {
 735         const struct it87_data *data = dev_get_drvdata(dev);
 736         int i, err = 0;
 737
 738         if (has_old_autopwm(data)) {
 739                 for (i = 0; i < 3; i++) {
 740                         if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
 741                                 err = -EINVAL;
 742                 }
 743                 for (i = 0; i < 2; i++) {
 744                         if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
 745                                 err = -EINVAL;
 746                 }
 747         }
 748
 749         if (err) {
 750                 dev_err(dev, "Inconsistent trip points, not switching to "
 751                         "automatic mode\n");
 752                 dev_err(dev, "Adjust the trip points and try again\n");
 753         }
 754         return err;
 755 }
 756
 757 static ssize_t set_pwm_enable(struct device *dev,
 758                 struct device_attribute *attr, const char *buf, size_t count)
 759 {
 760         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 761         int nr = sensor_attr->index;
 762
 763         struct it87_data *data = dev_get_drvdata(dev);
 764         long val;
 765
 766         if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2)
 767                 return -EINVAL;
 768
 769         /* Check trip points before switching to automatic mode */
 770         if (val == 2) {
 771                 if (check_trip_points(dev, nr) < 0)
 772                         return -EINVAL;
 773         }
 774
 775         mutex_lock(&data->update_lock);
 776
 777         if (val == 0) {
 778                 int tmp;
 779                 /* make sure the fan is on when in on/off mode */
 780                 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
 781                 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
 782                 /* set on/off mode */
 783                 data->fan_main_ctrl &= ~(1 << nr);
 784                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
 785                                  data->fan_main_ctrl);
 786         } else {
 787                 if (val == 1)                           /* Manual mode */
 788                         data->pwm_ctrl[nr] = data->pwm_duty[nr];
 789                 else                                    /* Automatic mode */
 790                         data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
 791                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
 792                 /* set SmartGuardian mode */
 793                 data->fan_main_ctrl |= (1 << nr);
 794                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
 795                                  data->fan_main_ctrl);
 796         }
 797
 798         mutex_unlock(&data->update_lock);
 799         return count;
 800 }
 801 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 802                 const char *buf, size_t count)
 803 {
 804         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 805         int nr = sensor_attr->index;
 806
 807         struct it87_data *data = dev_get_drvdata(dev);
 808         long val;
 809
 810         if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
 811                 return -EINVAL;
 812
 813         mutex_lock(&data->update_lock);
 814         data->pwm_duty[nr] = PWM_TO_REG(val);
 815         /* If we are in manual mode, write the duty cycle immediately;
 816          * otherwise, just store it for later use. */
 817         if (!(data->pwm_ctrl[nr] & 0x80)) {
 818                 data->pwm_ctrl[nr] = data->pwm_duty[nr];
 819                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
 820         }
 821         mutex_unlock(&data->update_lock);
 822         return count;
 823 }
 824 static ssize_t set_pwm_freq(struct device *dev,
 825                 struct device_attribute *attr, const char *buf, size_t count)
 826 {
 827         struct it87_data *data = dev_get_drvdata(dev);
 828         unsigned long val;
 829         int i;
 830
 831         if (strict_strtoul(buf, 10, &val) < 0)
 832                 return -EINVAL;
 833
 834         /* Search for the nearest available frequency */
 835         for (i = 0; i < 7; i++) {
 836                 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
 837                         break;
 838         }
 839
 840         mutex_lock(&data->update_lock);
 841         data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
 842         data->fan_ctl |= i << 4;
 843         it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
 844         mutex_unlock(&data->update_lock);
 845
 846         return count;
 847 }
 848 static ssize_t show_pwm_temp_map(struct device *dev,
 849                 struct device_attribute *attr, char *buf)
 850 {
 851         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 852         int nr = sensor_attr->index;
 853
 854         struct it87_data *data = it87_update_device(dev);
 855         int map;
 856
 857         if (data->pwm_temp_map[nr] < 3)
 858                 map = 1 << data->pwm_temp_map[nr];
 859         else
 860                 map = 0;                        /* Should never happen */
 861         return sprintf(buf, "%d\n", map);
 862 }
 863 static ssize_t set_pwm_temp_map(struct device *dev,
 864                 struct device_attribute *attr, const char *buf, size_t count)
 865 {
 866         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 867         int nr = sensor_attr->index;
 868
 869         struct it87_data *data = dev_get_drvdata(dev);
 870         long val;
 871         u8 reg;
 872
 873         /* This check can go away if we ever support automatic fan speed
 874            control on newer chips. */
 875         if (!has_old_autopwm(data)) {
 876                 dev_notice(dev, "Mapping change disabled for safety reasons\n");
 877                 return -EINVAL;
 878         }
 879
 880         if (strict_strtol(buf, 10, &val) < 0)
 881                 return -EINVAL;
 882
 883         switch (val) {
 884         case (1 << 0):
 885                 reg = 0x00;
 886                 break;
 887         case (1 << 1):
 888                 reg = 0x01;
 889                 break;
 890         case (1 << 2):
 891                 reg = 0x02;
 892                 break;
 893         default:
 894                 return -EINVAL;
 895         }
 896
 897         mutex_lock(&data->update_lock);
 898         data->pwm_temp_map[nr] = reg;
 899         /* If we are in automatic mode, write the temp mapping immediately;
 900          * otherwise, just store it for later use. */
 901         if (data->pwm_ctrl[nr] & 0x80) {
 902                 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
 903                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
 904         }
 905         mutex_unlock(&data->update_lock);
 906         return count;
 907 }
 908
 909 static ssize_t show_auto_pwm(struct device *dev,
 910                 struct device_attribute *attr, char *buf)
 911 {
 912         struct it87_data *data = it87_update_device(dev);
 913         struct sensor_device_attribute_2 *sensor_attr =
 914                         to_sensor_dev_attr_2(attr);
 915         int nr = sensor_attr->nr;
 916         int point = sensor_attr->index;
 917
 918         return sprintf(buf, "%d\n", PWM_FROM_REG(data->auto_pwm[nr][point]));
 919 }
 920
 921 static ssize_t set_auto_pwm(struct device *dev,
 922                 struct device_attribute *attr, const char *buf, size_t count)
 923 {
 924         struct it87_data *data = dev_get_drvdata(dev);
 925         struct sensor_device_attribute_2 *sensor_attr =
 926                         to_sensor_dev_attr_2(attr);
 927         int nr = sensor_attr->nr;
 928         int point = sensor_attr->index;
 929         long val;
 930
 931         if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
 932                 return -EINVAL;
 933
 934         mutex_lock(&data->update_lock);
 935         data->auto_pwm[nr][point] = PWM_TO_REG(val);
 936         it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
 937                          data->auto_pwm[nr][point]);
 938         mutex_unlock(&data->update_lock);
 939         return count;
 940 }
 941
 942 static ssize_t show_auto_temp(struct device *dev,
 943                 struct device_attribute *attr, char *buf)
 944 {
 945         struct it87_data *data = it87_update_device(dev);
 946         struct sensor_device_attribute_2 *sensor_attr =
 947                         to_sensor_dev_attr_2(attr);
 948         int nr = sensor_attr->nr;
 949         int point = sensor_attr->index;
 950
 951         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
 952 }
 953
 954 static ssize_t set_auto_temp(struct device *dev,
 955                 struct device_attribute *attr, const char *buf, size_t count)
 956 {
 957         struct it87_data *data = dev_get_drvdata(dev);
 958         struct sensor_device_attribute_2 *sensor_attr =
 959                         to_sensor_dev_attr_2(attr);
 960         int nr = sensor_attr->nr;
 961         int point = sensor_attr->index;
 962         long val;
 963
 964         if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
 965                 return -EINVAL;
 966
 967         mutex_lock(&data->update_lock);
 968         data->auto_temp[nr][point] = TEMP_TO_REG(val);
 969         it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
 970                          data->auto_temp[nr][point]);
 971         mutex_unlock(&data->update_lock);
 972         return count;
 973 }
 974
 975 #define show_fan_offset(offset)                                 \
 976 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,         \
 977                 show_fan, NULL, offset - 1);                    \
 978 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
 979                 show_fan_min, set_fan_min, offset - 1);         \
 980 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
 981                 show_fan_div, set_fan_div, offset - 1);
 982
 983 show_fan_offset(1);
 984 show_fan_offset(2);
 985 show_fan_offset(3);
 986
 987 #define show_pwm_offset(offset)                                         \
 988 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR,      \
 989                 show_pwm_enable, set_pwm_enable, offset - 1);           \
 990 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,               \
 991                 show_pwm, set_pwm, offset - 1);                         \
 992 static DEVICE_ATTR(pwm##offset##_freq,                                  \
 993                 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO),            \
 994                 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL));    \
 995 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp,             \
 996                 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
 997                 offset - 1);                                            \
 998 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm,              \
 999                 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,         \
1000                 offset - 1, 0);                                         \
1001 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm,              \
1002                 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,         \
1003                 offset - 1, 1);                                         \
1004 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm,              \
1005                 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,         \
1006                 offset - 1, 2);                                         \
1007 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm,              \
1008                 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3);           \
1009 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp,             \
1010                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1011                 offset - 1, 1);                                         \
1012 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst,        \
1013                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1014                 offset - 1, 0);                                         \
1015 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp,             \
1016                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1017                 offset - 1, 2);                                         \
1018 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp,             \
1019                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1020                 offset - 1, 3);                                         \
1021 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp,             \
1022                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1023                 offset - 1, 4);
1024
1025 show_pwm_offset(1);
1026 show_pwm_offset(2);
1027 show_pwm_offset(3);
1028
1029 /* A different set of callbacks for 16-bit fans */
1030 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
1031                 char *buf)
1032 {
1033         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1034         int nr = sensor_attr->index;
1035         struct it87_data *data = it87_update_device(dev);
1036         return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
1037 }
1038
1039 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
1040                 char *buf)
1041 {
1042         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1043         int nr = sensor_attr->index;
1044         struct it87_data *data = it87_update_device(dev);
1045         return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
1046 }
1047
1048 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
1049                 const char *buf, size_t count)
1050 {
1051         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1052         int nr = sensor_attr->index;
1053         struct it87_data *data = dev_get_drvdata(dev);
1054         long val;
1055
1056         if (strict_strtol(buf, 10, &val) < 0)
1057                 return -EINVAL;
1058
1059         mutex_lock(&data->update_lock);
1060         data->fan_min[nr] = FAN16_TO_REG(val);
1061         it87_write_value(data, IT87_REG_FAN_MIN[nr],
1062                          data->fan_min[nr] & 0xff);
1063         it87_write_value(data, IT87_REG_FANX_MIN[nr],
1064                          data->fan_min[nr] >> 8);
1065         mutex_unlock(&data->update_lock);
1066         return count;
1067 }
1068
1069 /* We want to use the same sysfs file names as 8-bit fans, but we need
1070    different variable names, so we have to use SENSOR_ATTR instead of
1071    SENSOR_DEVICE_ATTR. */
1072 #define show_fan16_offset(offset) \
1073 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
1074         = SENSOR_ATTR(fan##offset##_input, S_IRUGO,             \
1075                 show_fan16, NULL, offset - 1);                  \
1076 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
1077         = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,     \
1078                 show_fan16_min, set_fan16_min, offset - 1)
1079
1080 show_fan16_offset(1);
1081 show_fan16_offset(2);
1082 show_fan16_offset(3);
1083 show_fan16_offset(4);
1084 show_fan16_offset(5);
1085
1086 /* Alarms */
1087 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1088                 char *buf)
1089 {
1090         struct it87_data *data = it87_update_device(dev);
1091         return sprintf(buf, "%u\n", data->alarms);
1092 }
1093 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1094
1095 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1096                 char *buf)
1097 {
1098         int bitnr = to_sensor_dev_attr(attr)->index;
1099         struct it87_data *data = it87_update_device(dev);
1100         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1101 }
1102 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1103 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1104 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1105 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1106 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1107 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1108 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1109 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1110 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1111 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1112 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1113 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1114 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1115 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1116 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1117 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1118
1119 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1120                 char *buf)
1121 {
1122         int bitnr = to_sensor_dev_attr(attr)->index;
1123         struct it87_data *data = it87_update_device(dev);
1124         return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1125 }
1126 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1127                 const char *buf, size_t count)
1128 {
1129         int bitnr = to_sensor_dev_attr(attr)->index;
1130         struct it87_data *data = dev_get_drvdata(dev);
1131         long val;
1132
1133         if (strict_strtol(buf, 10, &val) < 0
1134          || (val != 0 && val != 1))
1135                 return -EINVAL;
1136
1137         mutex_lock(&data->update_lock);
1138         data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1139         if (val)
1140                 data->beeps |= (1 << bitnr);
1141         else
1142                 data->beeps &= ~(1 << bitnr);
1143         it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1144         mutex_unlock(&data->update_lock);
1145         return count;
1146 }
1147
1148 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1149                           show_beep, set_beep, 1);
1150 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1151 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1152 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1153 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1154 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1155 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1156 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1157 /* fanX_beep writability is set later */
1158 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1159 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1160 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1161 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1162 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1163 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1164                           show_beep, set_beep, 2);
1165 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1166 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1167
1168 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1169                 char *buf)
1170 {
1171         struct it87_data *data = dev_get_drvdata(dev);
1172         return sprintf(buf, "%u\n", data->vrm);
1173 }
1174 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1175                 const char *buf, size_t count)
1176 {
1177         struct it87_data *data = dev_get_drvdata(dev);
1178         unsigned long val;
1179
1180         if (strict_strtoul(buf, 10, &val) < 0)
1181                 return -EINVAL;
1182
1183         data->vrm = val;
1184
1185         return count;
1186 }
1187 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1188
1189 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1190                 char *buf)
1191 {
1192         struct it87_data *data = it87_update_device(dev);
1193         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1194 }
1195 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1196
1197 static ssize_t show_name(struct device *dev, struct device_attribute
1198                          *devattr, char *buf)
1199 {
1200         struct it87_data *data = dev_get_drvdata(dev);
1201         return sprintf(buf, "%s\n", data->name);
1202 }
1203 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1204
1205 static struct attribute *it87_attributes[] = {
1206         &sensor_dev_attr_in0_input.dev_attr.attr,
1207         &sensor_dev_attr_in1_input.dev_attr.attr,
1208         &sensor_dev_attr_in2_input.dev_attr.attr,
1209         &sensor_dev_attr_in3_input.dev_attr.attr,
1210         &sensor_dev_attr_in4_input.dev_attr.attr,
1211         &sensor_dev_attr_in5_input.dev_attr.attr,
1212         &sensor_dev_attr_in6_input.dev_attr.attr,
1213         &sensor_dev_attr_in7_input.dev_attr.attr,
1214         &sensor_dev_attr_in8_input.dev_attr.attr,
1215         &sensor_dev_attr_in0_min.dev_attr.attr,
1216         &sensor_dev_attr_in1_min.dev_attr.attr,
1217         &sensor_dev_attr_in2_min.dev_attr.attr,
1218         &sensor_dev_attr_in3_min.dev_attr.attr,
1219         &sensor_dev_attr_in4_min.dev_attr.attr,
1220         &sensor_dev_attr_in5_min.dev_attr.attr,
1221         &sensor_dev_attr_in6_min.dev_attr.attr,
1222         &sensor_dev_attr_in7_min.dev_attr.attr,
1223         &sensor_dev_attr_in0_max.dev_attr.attr,
1224         &sensor_dev_attr_in1_max.dev_attr.attr,
1225         &sensor_dev_attr_in2_max.dev_attr.attr,
1226         &sensor_dev_attr_in3_max.dev_attr.attr,
1227         &sensor_dev_attr_in4_max.dev_attr.attr,
1228         &sensor_dev_attr_in5_max.dev_attr.attr,
1229         &sensor_dev_attr_in6_max.dev_attr.attr,
1230         &sensor_dev_attr_in7_max.dev_attr.attr,
1231         &sensor_dev_attr_in0_alarm.dev_attr.attr,
1232         &sensor_dev_attr_in1_alarm.dev_attr.attr,
1233         &sensor_dev_attr_in2_alarm.dev_attr.attr,
1234         &sensor_dev_attr_in3_alarm.dev_attr.attr,
1235         &sensor_dev_attr_in4_alarm.dev_attr.attr,
1236         &sensor_dev_attr_in5_alarm.dev_attr.attr,
1237         &sensor_dev_attr_in6_alarm.dev_attr.attr,
1238         &sensor_dev_attr_in7_alarm.dev_attr.attr,
1239
1240         &sensor_dev_attr_temp1_input.dev_attr.attr,
1241         &sensor_dev_attr_temp2_input.dev_attr.attr,
1242         &sensor_dev_attr_temp3_input.dev_attr.attr,
1243         &sensor_dev_attr_temp1_max.dev_attr.attr,
1244         &sensor_dev_attr_temp2_max.dev_attr.attr,
1245         &sensor_dev_attr_temp3_max.dev_attr.attr,
1246         &sensor_dev_attr_temp1_min.dev_attr.attr,
1247         &sensor_dev_attr_temp2_min.dev_attr.attr,
1248         &sensor_dev_attr_temp3_min.dev_attr.attr,
1249         &sensor_dev_attr_temp1_type.dev_attr.attr,
1250         &sensor_dev_attr_temp2_type.dev_attr.attr,
1251         &sensor_dev_attr_temp3_type.dev_attr.attr,
1252         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1253         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1254         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1255
1256         &dev_attr_alarms.attr,
1257         &dev_attr_name.attr,
1258         NULL
1259 };
1260
1261 static const struct attribute_group it87_group = {
1262         .attrs = it87_attributes,
1263 };
1264
1265 static struct attribute *it87_attributes_beep[] = {
1266         &sensor_dev_attr_in0_beep.dev_attr.attr,
1267         &sensor_dev_attr_in1_beep.dev_attr.attr,
1268         &sensor_dev_attr_in2_beep.dev_attr.attr,
1269         &sensor_dev_attr_in3_beep.dev_attr.attr,
1270         &sensor_dev_attr_in4_beep.dev_attr.attr,
1271         &sensor_dev_attr_in5_beep.dev_attr.attr,
1272         &sensor_dev_attr_in6_beep.dev_attr.attr,
1273         &sensor_dev_attr_in7_beep.dev_attr.attr,
1274
1275         &sensor_dev_attr_temp1_beep.dev_attr.attr,
1276         &sensor_dev_attr_temp2_beep.dev_attr.attr,
1277         &sensor_dev_attr_temp3_beep.dev_attr.attr,
1278         NULL
1279 };
1280
1281 static const struct attribute_group it87_group_beep = {
1282         .attrs = it87_attributes_beep,
1283 };
1284
1285 static struct attribute *it87_attributes_fan16[5][3+1] = { {
1286         &sensor_dev_attr_fan1_input16.dev_attr.attr,
1287         &sensor_dev_attr_fan1_min16.dev_attr.attr,
1288         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1289         NULL
1290 }, {
1291         &sensor_dev_attr_fan2_input16.dev_attr.attr,
1292         &sensor_dev_attr_fan2_min16.dev_attr.attr,
1293         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1294         NULL
1295 }, {
1296         &sensor_dev_attr_fan3_input16.dev_attr.attr,
1297         &sensor_dev_attr_fan3_min16.dev_attr.attr,
1298         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1299         NULL
1300 }, {
1301         &sensor_dev_attr_fan4_input16.dev_attr.attr,
1302         &sensor_dev_attr_fan4_min16.dev_attr.attr,
1303         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1304         NULL
1305 }, {
1306         &sensor_dev_attr_fan5_input16.dev_attr.attr,
1307         &sensor_dev_attr_fan5_min16.dev_attr.attr,
1308         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1309         NULL
1310 } };
1311
1312 static const struct attribute_group it87_group_fan16[5] = {
1313         { .attrs = it87_attributes_fan16[0] },
1314         { .attrs = it87_attributes_fan16[1] },
1315         { .attrs = it87_attributes_fan16[2] },
1316         { .attrs = it87_attributes_fan16[3] },
1317         { .attrs = it87_attributes_fan16[4] },
1318 };
1319
1320 static struct attribute *it87_attributes_fan[3][4+1] = { {
1321         &sensor_dev_attr_fan1_input.dev_attr.attr,
1322         &sensor_dev_attr_fan1_min.dev_attr.attr,
1323         &sensor_dev_attr_fan1_div.dev_attr.attr,
1324         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1325         NULL
1326 }, {
1327         &sensor_dev_attr_fan2_input.dev_attr.attr,
1328         &sensor_dev_attr_fan2_min.dev_attr.attr,
1329         &sensor_dev_attr_fan2_div.dev_attr.attr,
1330         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1331         NULL
1332 }, {
1333         &sensor_dev_attr_fan3_input.dev_attr.attr,
1334         &sensor_dev_attr_fan3_min.dev_attr.attr,
1335         &sensor_dev_attr_fan3_div.dev_attr.attr,
1336         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1337         NULL
1338 } };
1339
1340 static const struct attribute_group it87_group_fan[3] = {
1341         { .attrs = it87_attributes_fan[0] },
1342         { .attrs = it87_attributes_fan[1] },
1343         { .attrs = it87_attributes_fan[2] },
1344 };
1345
1346 static const struct attribute_group *
1347 it87_get_fan_group(const struct it87_data *data)
1348 {
1349         return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
1350 }
1351
1352 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1353         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1354         &sensor_dev_attr_pwm1.dev_attr.attr,
1355         &dev_attr_pwm1_freq.attr,
1356         &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1357         NULL
1358 }, {
1359         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1360         &sensor_dev_attr_pwm2.dev_attr.attr,
1361         &dev_attr_pwm2_freq.attr,
1362         &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1363         NULL
1364 }, {
1365         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1366         &sensor_dev_attr_pwm3.dev_attr.attr,
1367         &dev_attr_pwm3_freq.attr,
1368         &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1369         NULL
1370 } };
1371
1372 static const struct attribute_group it87_group_pwm[3] = {
1373         { .attrs = it87_attributes_pwm[0] },
1374         { .attrs = it87_attributes_pwm[1] },
1375         { .attrs = it87_attributes_pwm[2] },
1376 };
1377
1378 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1379         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1380         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1381         &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1382         &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1383         &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1384         &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1385         &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1386         &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1387         &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1388         NULL
1389 }, {
1390         &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1391         &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1392         &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1393         &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1394         &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1395         &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1396         &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1397         &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1398         &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1399         NULL
1400 }, {
1401         &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1402         &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1403         &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1404         &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1405         &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1406         &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1407         &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1408         &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1409         &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1410         NULL
1411 } };
1412
1413 static const struct attribute_group it87_group_autopwm[3] = {
1414         { .attrs = it87_attributes_autopwm[0] },
1415         { .attrs = it87_attributes_autopwm[1] },
1416         { .attrs = it87_attributes_autopwm[2] },
1417 };
1418
1419 static struct attribute *it87_attributes_fan_beep[] = {
1420         &sensor_dev_attr_fan1_beep.dev_attr.attr,
1421         &sensor_dev_attr_fan2_beep.dev_attr.attr,
1422         &sensor_dev_attr_fan3_beep.dev_attr.attr,
1423         &sensor_dev_attr_fan4_beep.dev_attr.attr,
1424         &sensor_dev_attr_fan5_beep.dev_attr.attr,
1425 };
1426
1427 static struct attribute *it87_attributes_vid[] = {
1428         &dev_attr_vrm.attr,
1429         &dev_attr_cpu0_vid.attr,
1430         NULL
1431 };
1432
1433 static const struct attribute_group it87_group_vid = {
1434         .attrs = it87_attributes_vid,
1435 };
1436
1437 /* SuperIO detection - will change isa_address if a chip is found */
1438 static int __init it87_find(unsigned short *address,
1439         struct it87_sio_data *sio_data)
1440 {
1441         int err = -ENODEV;
1442         u16 chip_type;
1443         const char *board_vendor, *board_name;
1444
1445         superio_enter();
1446         chip_type = force_id ? force_id : superio_inw(DEVID);
1447
1448         switch (chip_type) {
1449         case IT8705F_DEVID:
1450                 sio_data->type = it87;
1451                 break;
1452         case IT8712F_DEVID:
1453                 sio_data->type = it8712;
1454                 break;
1455         case IT8716F_DEVID:
1456         case IT8726F_DEVID:
1457                 sio_data->type = it8716;
1458                 break;
1459         case IT8718F_DEVID:
1460                 sio_data->type = it8718;
1461                 break;
1462         case IT8720F_DEVID:
1463                 sio_data->type = it8720;
1464                 break;
1465         case 0xffff:    /* No device at all */
1466                 goto exit;
1467         default:
1468                 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n",
1469                          chip_type);
1470                 goto exit;
1471         }
1472
1473         superio_select(PME);
1474         if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1475                 pr_info("it87: Device not activated, skipping\n");
1476                 goto exit;
1477         }
1478
1479         *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1480         if (*address == 0) {
1481                 pr_info("it87: Base address not set, skipping\n");
1482                 goto exit;
1483         }
1484
1485         err = 0;
1486         sio_data->revision = superio_inb(DEVREV) & 0x0f;
1487         pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
1488                 chip_type, *address, sio_data->revision);
1489
1490         /* Read GPIO config and VID value from LDN 7 (GPIO) */
1491         if (sio_data->type == it87) {
1492                 /* The IT8705F doesn't have VID pins at all */
1493                 sio_data->skip_vid = 1;
1494
1495                 /* The IT8705F has a different LD number for GPIO */
1496                 superio_select(5);
1497                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1498         } else {
1499                 int reg;
1500
1501                 superio_select(GPIO);
1502                 /* We need at least 4 VID pins */
1503                 reg = superio_inb(IT87_SIO_GPIO3_REG);
1504                 if (reg & 0x0f) {
1505                         pr_info("it87: VID is disabled (pins used for GPIO)\n");
1506                         sio_data->skip_vid = 1;
1507                 }
1508
1509                 /* Check if fan3 is there or not */
1510                 if (reg & (1 << 6))
1511                         sio_data->skip_pwm |= (1 << 2);
1512                 if (reg & (1 << 7))
1513                         sio_data->skip_fan |= (1 << 2);
1514
1515                 /* Check if fan2 is there or not */
1516                 reg = superio_inb(IT87_SIO_GPIO5_REG);
1517                 if (reg & (1 << 1))
1518                         sio_data->skip_pwm |= (1 << 1);
1519                 if (reg & (1 << 2))
1520                         sio_data->skip_fan |= (1 << 1);
1521
1522                 if ((sio_data->type == it8718 || sio_data->type == it8720)
1523                  && !(sio_data->skip_vid))
1524                         sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1525
1526                 reg = superio_inb(IT87_SIO_PINX2_REG);
1527                 /*
1528                  * The IT8720F has no VIN7 pin, so VCCH should always be
1529                  * routed internally to VIN7 with an internal divider.
1530                  * Curiously, there still is a configuration bit to control
1531                  * this, which means it can be set incorrectly. And even
1532                  * more curiously, many boards out there are improperly
1533                  * configured, even though the IT8720F datasheet claims
1534                  * that the internal routing of VCCH to VIN7 is the default
1535                  * setting. So we force the internal routing in this case.
1536                  */
1537                 if (sio_data->type == it8720 && !(reg & (1 << 1))) {
1538                         reg |= (1 << 1);
1539                         superio_outb(IT87_SIO_PINX2_REG, reg);
1540                         pr_notice("it87: Routing internal VCCH to in7\n");
1541                 }
1542                 if (reg & (1 << 0))
1543                         pr_info("it87: in3 is VCC (+5V)\n");
1544                 if (reg & (1 << 1))
1545                         pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
1546
1547                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1548         }
1549         if (sio_data->beep_pin)
1550                 pr_info("it87: Beeping is supported\n");
1551
1552         /* Disable specific features based on DMI strings */
1553         board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1554         board_name = dmi_get_system_info(DMI_BOARD_NAME);
1555         if (board_vendor && board_name) {
1556                 if (strcmp(board_vendor, "nVIDIA") == 0
1557                  && strcmp(board_name, "FN68PT") == 0) {
1558                         /* On the Shuttle SN68PT, FAN_CTL2 is apparently not
1559                            connected to a fan, but to something else. One user
1560                            has reported instant system power-off when changing
1561                            the PWM2 duty cycle, so we disable it.
1562                            I use the board name string as the trigger in case
1563                            the same board is ever used in other systems. */
1564                         pr_info("it87: Disabling pwm2 due to "
1565                                 "hardware constraints\n");
1566                         sio_data->skip_pwm = (1 << 1);
1567                 }
1568         }
1569
1570 exit:
1571         superio_exit();
1572         return err;
1573 }
1574
1575 static void it87_remove_files(struct device *dev)
1576 {
1577         struct it87_data *data = platform_get_drvdata(pdev);
1578         struct it87_sio_data *sio_data = dev->platform_data;
1579         const struct attribute_group *fan_group = it87_get_fan_group(data);
1580         int i;
1581
1582         sysfs_remove_group(&dev->kobj, &it87_group);
1583         if (sio_data->beep_pin)
1584                 sysfs_remove_group(&dev->kobj, &it87_group_beep);
1585         for (i = 0; i < 5; i++) {
1586                 if (!(data->has_fan & (1 << i)))
1587                         continue;
1588                 sysfs_remove_group(&dev->kobj, &fan_group[i]);
1589                 if (sio_data->beep_pin)
1590                         sysfs_remove_file(&dev->kobj,
1591                                           it87_attributes_fan_beep[i]);
1592         }
1593         for (i = 0; i < 3; i++) {
1594                 if (sio_data->skip_pwm & (1 << 0))
1595                         continue;
1596                 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1597                 if (has_old_autopwm(data))
1598                         sysfs_remove_group(&dev->kobj,
1599                                            &it87_group_autopwm[i]);
1600         }
1601         if (!sio_data->skip_vid)
1602                 sysfs_remove_group(&dev->kobj, &it87_group_vid);
1603 }
1604
1605 static int __devinit it87_probe(struct platform_device *pdev)
1606 {
1607         struct it87_data *data;
1608         struct resource *res;
1609         struct device *dev = &pdev->dev;
1610         struct it87_sio_data *sio_data = dev->platform_data;
1611         const struct attribute_group *fan_group;
1612         int err = 0, i;
1613         int enable_pwm_interface;
1614         int fan_beep_need_rw;
1615         static const char *names[] = {
1616                 "it87",
1617                 "it8712",
1618                 "it8716",
1619                 "it8718",
1620                 "it8720",
1621         };
1622
1623         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1624         if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
1625                 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1626                         (unsigned long)res->start,
1627                         (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1628                 err = -EBUSY;
1629                 goto ERROR0;
1630         }
1631
1632         data = kzalloc(sizeof(struct it87_data), GFP_KERNEL);
1633         if (!data) {
1634                 err = -ENOMEM;
1635                 goto ERROR1;
1636         }
1637
1638         data->addr = res->start;
1639         data->type = sio_data->type;
1640         data->revision = sio_data->revision;
1641         data->name = names[sio_data->type];
1642
1643         /* Now, we do the remaining detection. */
1644         if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1645          || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
1646                 err = -ENODEV;
1647                 goto ERROR2;
1648         }
1649
1650         platform_set_drvdata(pdev, data);
1651
1652         mutex_init(&data->update_lock);
1653
1654         /* Check PWM configuration */
1655         enable_pwm_interface = it87_check_pwm(dev);
1656
1657         /* Initialize the IT87 chip */
1658         it87_init_device(pdev);
1659
1660         /* Register sysfs hooks */
1661         err = sysfs_create_group(&dev->kobj, &it87_group);
1662         if (err)
1663                 goto ERROR2;
1664
1665         if (sio_data->beep_pin) {
1666                 err = sysfs_create_group(&dev->kobj, &it87_group_beep);
1667                 if (err)
1668                         goto ERROR4;
1669         }
1670
1671         /* Do not create fan files for disabled fans */
1672         fan_group = it87_get_fan_group(data);
1673         fan_beep_need_rw = 1;
1674         for (i = 0; i < 5; i++) {
1675                 if (!(data->has_fan & (1 << i)))
1676                         continue;
1677                 err = sysfs_create_group(&dev->kobj, &fan_group[i]);
1678                 if (err)
1679                         goto ERROR4;
1680
1681                 if (sio_data->beep_pin) {
1682                         err = sysfs_create_file(&dev->kobj,
1683                                                 it87_attributes_fan_beep[i]);
1684                         if (err)
1685                                 goto ERROR4;
1686                         if (!fan_beep_need_rw)
1687                                 continue;
1688
1689                         /* As we have a single beep enable bit for all fans,
1690                          * only the first enabled fan has a writable attribute
1691                          * for it. */
1692                         if (sysfs_chmod_file(&dev->kobj,
1693                                              it87_attributes_fan_beep[i],
1694                                              S_IRUGO | S_IWUSR))
1695                                 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
1696                                         i + 1);
1697                         fan_beep_need_rw = 0;
1698                 }
1699         }
1700
1701         if (enable_pwm_interface) {
1702                 for (i = 0; i < 3; i++) {
1703                         if (sio_data->skip_pwm & (1 << i))
1704                                 continue;
1705                         err = sysfs_create_group(&dev->kobj,
1706                                                  &it87_group_pwm[i]);
1707                         if (err)
1708                                 goto ERROR4;
1709
1710                         if (!has_old_autopwm(data))
1711                                 continue;
1712                         err = sysfs_create_group(&dev->kobj,
1713                                                  &it87_group_autopwm[i]);
1714                         if (err)
1715                                 goto ERROR4;
1716                 }
1717         }
1718
1719         if (!sio_data->skip_vid) {
1720                 data->vrm = vid_which_vrm();
1721                 /* VID reading from Super-I/O config space if available */
1722                 data->vid = sio_data->vid_value;
1723                 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
1724                 if (err)
1725                         goto ERROR4;
1726         }
1727
1728         data->hwmon_dev = hwmon_device_register(dev);
1729         if (IS_ERR(data->hwmon_dev)) {
1730                 err = PTR_ERR(data->hwmon_dev);
1731                 goto ERROR4;
1732         }
1733
1734         return 0;
1735
1736 ERROR4:
1737         it87_remove_files(dev);
1738 ERROR2:
1739         platform_set_drvdata(pdev, NULL);
1740         kfree(data);
1741 ERROR1:
1742         release_region(res->start, IT87_EC_EXTENT);
1743 ERROR0:
1744         return err;
1745 }
1746
1747 static int __devexit it87_remove(struct platform_device *pdev)
1748 {
1749         struct it87_data *data = platform_get_drvdata(pdev);
1750
1751         hwmon_device_unregister(data->hwmon_dev);
1752         it87_remove_files(&pdev->dev);
1753
1754         release_region(data->addr, IT87_EC_EXTENT);
1755         platform_set_drvdata(pdev, NULL);
1756         kfree(data);
1757
1758         return 0;
1759 }
1760
1761 /* Must be called with data->update_lock held, except during initialization.
1762    We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1763    would slow down the IT87 access and should not be necessary. */
1764 static int it87_read_value(struct it87_data *data, u8 reg)
1765 {
1766         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1767         return inb_p(data->addr + IT87_DATA_REG_OFFSET);
1768 }
1769
1770 /* Must be called with data->update_lock held, except during initialization.
1771    We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1772    would slow down the IT87 access and should not be necessary. */
1773 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
1774 {
1775         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1776         outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
1777 }
1778
1779 /* Return 1 if and only if the PWM interface is safe to use */
1780 static int __devinit it87_check_pwm(struct device *dev)
1781 {
1782         struct it87_data *data = dev_get_drvdata(dev);
1783         /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
1784          * and polarity set to active low is sign that this is the case so we
1785          * disable pwm control to protect the user. */
1786         int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1787         if ((tmp & 0x87) == 0) {
1788                 if (fix_pwm_polarity) {
1789                         /* The user asks us to attempt a chip reconfiguration.
1790                          * This means switching to active high polarity and
1791                          * inverting all fan speed values. */
1792                         int i;
1793                         u8 pwm[3];
1794
1795                         for (i = 0; i < 3; i++)
1796                                 pwm[i] = it87_read_value(data,
1797                                                          IT87_REG_PWM(i));
1798
1799                         /* If any fan is in automatic pwm mode, the polarity
1800                          * might be correct, as suspicious as it seems, so we
1801                          * better don't change anything (but still disable the
1802                          * PWM interface). */
1803                         if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
1804                                 dev_info(dev, "Reconfiguring PWM to "
1805                                          "active high polarity\n");
1806                                 it87_write_value(data, IT87_REG_FAN_CTL,
1807                                                  tmp | 0x87);
1808                                 for (i = 0; i < 3; i++)
1809                                         it87_write_value(data,
1810                                                          IT87_REG_PWM(i),
1811                                                          0x7f & ~pwm[i]);
1812                                 return 1;
1813                         }
1814
1815                         dev_info(dev, "PWM configuration is "
1816                                  "too broken to be fixed\n");
1817                 }
1818
1819                 dev_info(dev, "Detected broken BIOS "
1820                          "defaults, disabling PWM interface\n");
1821                 return 0;
1822         } else if (fix_pwm_polarity) {
1823                 dev_info(dev, "PWM configuration looks "
1824                          "sane, won't touch\n");
1825         }
1826
1827         return 1;
1828 }
1829
1830 /* Called when we have found a new IT87. */
1831 static void __devinit it87_init_device(struct platform_device *pdev)
1832 {
1833         struct it87_sio_data *sio_data = pdev->dev.platform_data;
1834         struct it87_data *data = platform_get_drvdata(pdev);
1835         int tmp, i;
1836         u8 mask;
1837
1838         /* For each PWM channel:
1839          * - If it is in automatic mode, setting to manual mode should set
1840          *   the fan to full speed by default.
1841          * - If it is in manual mode, we need a mapping to temperature
1842          *   channels to use when later setting to automatic mode later.
1843          *   Use a 1:1 mapping by default (we are clueless.)
1844          * In both cases, the value can (and should) be changed by the user
1845          * prior to switching to a different mode. */
1846         for (i = 0; i < 3; i++) {
1847                 data->pwm_temp_map[i] = i;
1848                 data->pwm_duty[i] = 0x7f;       /* Full speed */
1849                 data->auto_pwm[i][3] = 0x7f;    /* Full speed, hard-coded */
1850         }
1851
1852         /* Some chips seem to have default value 0xff for all limit
1853          * registers. For low voltage limits it makes no sense and triggers
1854          * alarms, so change to 0 instead. For high temperature limits, it
1855          * means -1 degree C, which surprisingly doesn't trigger an alarm,
1856          * but is still confusing, so change to 127 degrees C. */
1857         for (i = 0; i < 8; i++) {
1858                 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
1859                 if (tmp == 0xff)
1860                         it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
1861         }
1862         for (i = 0; i < 3; i++) {
1863                 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1864                 if (tmp == 0xff)
1865                         it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
1866         }
1867
1868         /* Temperature channels are not forcibly enabled, as they can be
1869          * set to two different sensor types and we can't guess which one
1870          * is correct for a given system. These channels can be enabled at
1871          * run-time through the temp{1-3}_type sysfs accessors if needed. */
1872
1873         /* Check if voltage monitors are reset manually or by some reason */
1874         tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
1875         if ((tmp & 0xff) == 0) {
1876                 /* Enable all voltage monitors */
1877                 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
1878         }
1879
1880         /* Check if tachometers are reset manually or by some reason */
1881         mask = 0x70 & ~(sio_data->skip_fan << 4);
1882         data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
1883         if ((data->fan_main_ctrl & mask) == 0) {
1884                 /* Enable all fan tachometers */
1885                 data->fan_main_ctrl |= mask;
1886                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1887                                  data->fan_main_ctrl);
1888         }
1889         data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
1890
1891         /* Set tachometers to 16-bit mode if needed */
1892         if (has_16bit_fans(data)) {
1893                 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
1894                 if (~tmp & 0x07 & data->has_fan) {
1895                         dev_dbg(&pdev->dev,
1896                                 "Setting fan1-3 to 16-bit mode\n");
1897                         it87_write_value(data, IT87_REG_FAN_16BIT,
1898                                          tmp | 0x07);
1899                 }
1900                 /* IT8705F only supports three fans. */
1901                 if (data->type != it87) {
1902                         if (tmp & (1 << 4))
1903                                 data->has_fan |= (1 << 3); /* fan4 enabled */
1904                         if (tmp & (1 << 5))
1905                                 data->has_fan |= (1 << 4); /* fan5 enabled */
1906                 }
1907         }
1908
1909         /* Fan input pins may be used for alternative functions */
1910         data->has_fan &= ~sio_data->skip_fan;
1911
1912         /* Start monitoring */
1913         it87_write_value(data, IT87_REG_CONFIG,
1914                          (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
1915                          | (update_vbat ? 0x41 : 0x01));
1916 }
1917
1918 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
1919 {
1920         data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
1921         if (data->pwm_ctrl[nr] & 0x80)  /* Automatic mode */
1922                 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
1923         else                            /* Manual mode */
1924                 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
1925
1926         if (has_old_autopwm(data)) {
1927                 int i;
1928
1929                 for (i = 0; i < 5 ; i++)
1930                         data->auto_temp[nr][i] = it87_read_value(data,
1931                                                 IT87_REG_AUTO_TEMP(nr, i));
1932                 for (i = 0; i < 3 ; i++)
1933                         data->auto_pwm[nr][i] = it87_read_value(data,
1934                                                 IT87_REG_AUTO_PWM(nr, i));
1935         }
1936 }
1937
1938 static struct it87_data *it87_update_device(struct device *dev)
1939 {
1940         struct it87_data *data = dev_get_drvdata(dev);
1941         int i;
1942
1943         mutex_lock(&data->update_lock);
1944
1945         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1946             || !data->valid) {
1947                 if (update_vbat) {
1948                         /* Cleared after each update, so reenable.  Value
1949                            returned by this read will be previous value */
1950                         it87_write_value(data, IT87_REG_CONFIG,
1951                                 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
1952                 }
1953                 for (i = 0; i <= 7; i++) {
1954                         data->in[i] =
1955                                 it87_read_value(data, IT87_REG_VIN(i));
1956                         data->in_min[i] =
1957                                 it87_read_value(data, IT87_REG_VIN_MIN(i));
1958                         data->in_max[i] =
1959                                 it87_read_value(data, IT87_REG_VIN_MAX(i));
1960                 }
1961                 /* in8 (battery) has no limit registers */
1962                 data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
1963
1964                 for (i = 0; i < 5; i++) {
1965                         /* Skip disabled fans */
1966                         if (!(data->has_fan & (1 << i)))
1967                                 continue;
1968
1969                         data->fan_min[i] =
1970                                 it87_read_value(data, IT87_REG_FAN_MIN[i]);
1971                         data->fan[i] = it87_read_value(data,
1972                                        IT87_REG_FAN[i]);
1973                         /* Add high byte if in 16-bit mode */
1974                         if (has_16bit_fans(data)) {
1975                                 data->fan[i] |= it87_read_value(data,
1976                                                 IT87_REG_FANX[i]) << 8;
1977                                 data->fan_min[i] |= it87_read_value(data,
1978                                                 IT87_REG_FANX_MIN[i]) << 8;
1979                         }
1980                 }
1981                 for (i = 0; i < 3; i++) {
1982                         data->temp[i] =
1983                                 it87_read_value(data, IT87_REG_TEMP(i));
1984                         data->temp_high[i] =
1985                                 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1986                         data->temp_low[i] =
1987                                 it87_read_value(data, IT87_REG_TEMP_LOW(i));
1988                 }
1989
1990                 /* Newer chips don't have clock dividers */
1991                 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
1992                         i = it87_read_value(data, IT87_REG_FAN_DIV);
1993                         data->fan_div[0] = i & 0x07;
1994                         data->fan_div[1] = (i >> 3) & 0x07;
1995                         data->fan_div[2] = (i & 0x40) ? 3 : 1;
1996                 }
1997
1998                 data->alarms =
1999                         it87_read_value(data, IT87_REG_ALARM1) |
2000                         (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2001                         (it87_read_value(data, IT87_REG_ALARM3) << 16);
2002                 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2003
2004                 data->fan_main_ctrl = it87_read_value(data,
2005                                 IT87_REG_FAN_MAIN_CTRL);
2006                 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2007                 for (i = 0; i < 3; i++)
2008                         it87_update_pwm_ctrl(data, i);
2009
2010                 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2011                 /* The 8705 does not have VID capability.
2012                    The 8718 and the 8720 don't use IT87_REG_VID for the
2013                    same purpose. */
2014                 if (data->type == it8712 || data->type == it8716) {
2015                         data->vid = it87_read_value(data, IT87_REG_VID);
2016                         /* The older IT8712F revisions had only 5 VID pins,
2017                            but we assume it is always safe to read 6 bits. */
2018                         data->vid &= 0x3f;
2019                 }
2020                 data->last_updated = jiffies;
2021                 data->valid = 1;
2022         }
2023
2024         mutex_unlock(&data->update_lock);
2025
2026         return data;
2027 }
2028
2029 static int __init it87_device_add(unsigned short address,
2030                                   const struct it87_sio_data *sio_data)
2031 {
2032         struct resource res = {
2033                 .start  = address + IT87_EC_OFFSET,
2034                 .end    = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2035                 .name   = DRVNAME,
2036                 .flags  = IORESOURCE_IO,
2037         };
2038         int err;
2039
2040         err = acpi_check_resource_conflict(&res);
2041         if (err)
2042                 goto exit;
2043
2044         pdev = platform_device_alloc(DRVNAME, address);
2045         if (!pdev) {
2046                 err = -ENOMEM;
2047                 printk(KERN_ERR DRVNAME ": Device allocation failed\n");
2048                 goto exit;
2049         }
2050
2051         err = platform_device_add_resources(pdev, &res, 1);
2052         if (err) {
2053                 printk(KERN_ERR DRVNAME ": Device resource addition failed "
2054                        "(%d)\n", err);
2055                 goto exit_device_put;
2056         }
2057
2058         err = platform_device_add_data(pdev, sio_data,
2059                                        sizeof(struct it87_sio_data));
2060         if (err) {
2061                 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
2062                 goto exit_device_put;
2063         }
2064
2065         err = platform_device_add(pdev);
2066         if (err) {
2067                 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
2068                        err);
2069                 goto exit_device_put;
2070         }
2071
2072         return 0;
2073
2074 exit_device_put:
2075         platform_device_put(pdev);
2076 exit:
2077         return err;
2078 }
2079
2080 static int __init sm_it87_init(void)
2081 {
2082         int err;
2083         unsigned short isa_address = 0;
2084         struct it87_sio_data sio_data;
2085
2086         memset(&sio_data, 0, sizeof(struct it87_sio_data));
2087         err = it87_find(&isa_address, &sio_data);
2088         if (err)
2089                 return err;
2090         err = platform_driver_register(&it87_driver);
2091         if (err)
2092                 return err;
2093
2094         err = it87_device_add(isa_address, &sio_data);
2095         if (err) {
2096                 platform_driver_unregister(&it87_driver);
2097                 return err;
2098         }
2099
2100         return 0;
2101 }
2102
2103 static void __exit sm_it87_exit(void)
2104 {
2105         platform_device_unregister(pdev);
2106         platform_driver_unregister(&it87_driver);
2107 }
2108
2109
2110 MODULE_AUTHOR("Chris Gauthron, "
2111               "Jean Delvare <khali@linux-fr.org>");
2112 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8720F/8726F, SiS950 driver");
2113 module_param(update_vbat, bool, 0);
2114 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2115 module_param(fix_pwm_polarity, bool, 0);
2116 MODULE_PARM_DESC(fix_pwm_polarity,
2117                  "Force PWM polarity to active high (DANGEROUS)");
2118 MODULE_LICENSE("GPL");
2119
2120 module_init(sm_it87_init);
2121 module_exit(sm_it87_exit);