linux/drivers/hwmon/pc87427.c
<<
>>
Prefs
   1/*
   2 *  pc87427.c - hardware monitoring driver for the
   3 *              National Semiconductor PC87427 Super-I/O chip
   4 *  Copyright (C) 2006, 2008, 2010  Jean Delvare <khali@linux-fr.org>
   5 *
   6 *  This program is free software; you can redistribute it and/or modify
   7 *  it under the terms of the GNU General Public License version 2 as
   8 *  published by the Free Software Foundation.
   9 *
  10 *  This program is distributed in the hope that it will be useful,
  11 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 *  GNU General Public License for more details.
  14 *
  15 *  Supports the following chips:
  16 *
  17 *  Chip        #vin    #fan    #pwm    #temp   devid
  18 *  PC87427     -       8       4       6       0xF2
  19 *
  20 *  This driver assumes that no more than one chip is present.
  21 *  Only fans are fully supported so far. Temperatures are in read-only
  22 *  mode, and voltages aren't supported at all.
  23 */
  24
  25#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  26
  27#include <linux/module.h>
  28#include <linux/init.h>
  29#include <linux/slab.h>
  30#include <linux/jiffies.h>
  31#include <linux/platform_device.h>
  32#include <linux/hwmon.h>
  33#include <linux/hwmon-sysfs.h>
  34#include <linux/err.h>
  35#include <linux/mutex.h>
  36#include <linux/sysfs.h>
  37#include <linux/ioport.h>
  38#include <linux/acpi.h>
  39#include <linux/io.h>
  40
  41static unsigned short force_id;
  42module_param(force_id, ushort, 0);
  43MODULE_PARM_DESC(force_id, "Override the detected device ID");
  44
  45static struct platform_device *pdev;
  46
  47#define DRVNAME "pc87427"
  48
  49/*
  50 * The lock mutex protects both the I/O accesses (needed because the
  51 * device is using banked registers) and the register cache (needed to keep
  52 * the data in the registers and the cache in sync at any time).
  53 */
  54struct pc87427_data {
  55        struct device *hwmon_dev;
  56        struct mutex lock;
  57        int address[2];
  58        const char *name;
  59
  60        unsigned long last_updated;     /* in jiffies */
  61        u8 fan_enabled;                 /* bit vector */
  62        u16 fan[8];                     /* register values */
  63        u16 fan_min[8];                 /* register values */
  64        u8 fan_status[8];               /* register values */
  65
  66        u8 pwm_enabled;                 /* bit vector */
  67        u8 pwm_auto_ok;                 /* bit vector */
  68        u8 pwm_enable[4];               /* register values */
  69        u8 pwm[4];                      /* register values */
  70
  71        u8 temp_enabled;                /* bit vector */
  72        s16 temp[6];                    /* register values */
  73        s8 temp_min[6];                 /* register values */
  74        s8 temp_max[6];                 /* register values */
  75        s8 temp_crit[6];                /* register values */
  76        u8 temp_status[6];              /* register values */
  77        u8 temp_type[6];                /* register values */
  78};
  79
  80struct pc87427_sio_data {
  81        unsigned short address[2];
  82        u8 has_fanin;
  83        u8 has_fanout;
  84};
  85
  86/*
  87 * Super-I/O registers and operations
  88 */
  89
  90#define SIOREG_LDSEL    0x07    /* Logical device select */
  91#define SIOREG_DEVID    0x20    /* Device ID */
  92#define SIOREG_CF2      0x22    /* Configuration 2 */
  93#define SIOREG_CF3      0x23    /* Configuration 3 */
  94#define SIOREG_CF4      0x24    /* Configuration 4 */
  95#define SIOREG_CF5      0x25    /* Configuration 5 */
  96#define SIOREG_CFB      0x2B    /* Configuration B */
  97#define SIOREG_CFC      0x2C    /* Configuration C */
  98#define SIOREG_CFD      0x2D    /* Configuration D */
  99#define SIOREG_ACT      0x30    /* Device activation */
 100#define SIOREG_MAP      0x50    /* I/O or memory mapping */
 101#define SIOREG_IOBASE   0x60    /* I/O base address */
 102
 103static const u8 logdev[2] = { 0x09, 0x14 };
 104static const char *logdev_str[2] = { DRVNAME " FMC", DRVNAME " HMC" };
 105#define LD_FAN          0
 106#define LD_IN           1
 107#define LD_TEMP         1
 108
 109static inline void superio_outb(int sioaddr, int reg, int val)
 110{
 111        outb(reg, sioaddr);
 112        outb(val, sioaddr + 1);
 113}
 114
 115static inline int superio_inb(int sioaddr, int reg)
 116{
 117        outb(reg, sioaddr);
 118        return inb(sioaddr + 1);
 119}
 120
 121static inline void superio_exit(int sioaddr)
 122{
 123        outb(0x02, sioaddr);
 124        outb(0x02, sioaddr + 1);
 125}
 126
 127/*
 128 * Logical devices
 129 */
 130
 131#define REGION_LENGTH           32
 132#define PC87427_REG_BANK        0x0f
 133#define BANK_FM(nr)             (nr)
 134#define BANK_FT(nr)             (0x08 + (nr))
 135#define BANK_FC(nr)             (0x10 + (nr) * 2)
 136#define BANK_TM(nr)             (nr)
 137#define BANK_VM(nr)             (0x08 + (nr))
 138
 139/*
 140 * I/O access functions
 141 */
 142
 143/* ldi is the logical device index */
 144static inline int pc87427_read8(struct pc87427_data *data, u8 ldi, u8 reg)
 145{
 146        return inb(data->address[ldi] + reg);
 147}
 148
 149/* Must be called with data->lock held, except during init */
 150static inline int pc87427_read8_bank(struct pc87427_data *data, u8 ldi,
 151                                     u8 bank, u8 reg)
 152{
 153        outb(bank, data->address[ldi] + PC87427_REG_BANK);
 154        return inb(data->address[ldi] + reg);
 155}
 156
 157/* Must be called with data->lock held, except during init */
 158static inline void pc87427_write8_bank(struct pc87427_data *data, u8 ldi,
 159                                       u8 bank, u8 reg, u8 value)
 160{
 161        outb(bank, data->address[ldi] + PC87427_REG_BANK);
 162        outb(value, data->address[ldi] + reg);
 163}
 164
 165/*
 166 * Fan registers and conversions
 167 */
 168
 169/* fan data registers are 16-bit wide */
 170#define PC87427_REG_FAN                 0x12
 171#define PC87427_REG_FAN_MIN             0x14
 172#define PC87427_REG_FAN_STATUS          0x10
 173
 174#define FAN_STATUS_STALL                (1 << 3)
 175#define FAN_STATUS_LOSPD                (1 << 1)
 176#define FAN_STATUS_MONEN                (1 << 0)
 177
 178/*
 179 * Dedicated function to read all registers related to a given fan input.
 180 * This saves us quite a few locks and bank selections.
 181 * Must be called with data->lock held.
 182 * nr is from 0 to 7
 183 */
 184static void pc87427_readall_fan(struct pc87427_data *data, u8 nr)
 185{
 186        int iobase = data->address[LD_FAN];
 187
 188        outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
 189        data->fan[nr] = inw(iobase + PC87427_REG_FAN);
 190        data->fan_min[nr] = inw(iobase + PC87427_REG_FAN_MIN);
 191        data->fan_status[nr] = inb(iobase + PC87427_REG_FAN_STATUS);
 192        /* Clear fan alarm bits */
 193        outb(data->fan_status[nr], iobase + PC87427_REG_FAN_STATUS);
 194}
 195
 196/*
 197 * The 2 LSB of fan speed registers are used for something different.
 198 * The actual 2 LSB of the measurements are not available.
 199 */
 200static inline unsigned long fan_from_reg(u16 reg)
 201{
 202        reg &= 0xfffc;
 203        if (reg == 0x0000 || reg == 0xfffc)
 204                return 0;
 205        return 5400000UL / reg;
 206}
 207
 208/* The 2 LSB of the fan speed limit registers are not significant. */
 209static inline u16 fan_to_reg(unsigned long val)
 210{
 211        if (val < 83UL)
 212                return 0xffff;
 213        if (val >= 1350000UL)
 214                return 0x0004;
 215        return ((1350000UL + val / 2) / val) << 2;
 216}
 217
 218/*
 219 * PWM registers and conversions
 220 */
 221
 222#define PC87427_REG_PWM_ENABLE          0x10
 223#define PC87427_REG_PWM_DUTY            0x12
 224
 225#define PWM_ENABLE_MODE_MASK            (7 << 4)
 226#define PWM_ENABLE_CTLEN                (1 << 0)
 227
 228#define PWM_MODE_MANUAL                 (0 << 4)
 229#define PWM_MODE_AUTO                   (1 << 4)
 230#define PWM_MODE_OFF                    (2 << 4)
 231#define PWM_MODE_ON                     (7 << 4)
 232
 233/*
 234 * Dedicated function to read all registers related to a given PWM output.
 235 * This saves us quite a few locks and bank selections.
 236 * Must be called with data->lock held.
 237 * nr is from 0 to 3
 238 */
 239static void pc87427_readall_pwm(struct pc87427_data *data, u8 nr)
 240{
 241        int iobase = data->address[LD_FAN];
 242
 243        outb(BANK_FC(nr), iobase + PC87427_REG_BANK);
 244        data->pwm_enable[nr] = inb(iobase + PC87427_REG_PWM_ENABLE);
 245        data->pwm[nr] = inb(iobase + PC87427_REG_PWM_DUTY);
 246}
 247
 248static inline int pwm_enable_from_reg(u8 reg)
 249{
 250        switch (reg & PWM_ENABLE_MODE_MASK) {
 251        case PWM_MODE_ON:
 252                return 0;
 253        case PWM_MODE_MANUAL:
 254        case PWM_MODE_OFF:
 255                return 1;
 256        case PWM_MODE_AUTO:
 257                return 2;
 258        default:
 259                return -EPROTO;
 260        }
 261}
 262
 263static inline u8 pwm_enable_to_reg(unsigned long val, u8 pwmval)
 264{
 265        switch (val) {
 266        default:
 267                return PWM_MODE_ON;
 268        case 1:
 269                return pwmval ? PWM_MODE_MANUAL : PWM_MODE_OFF;
 270        case 2:
 271                return PWM_MODE_AUTO;
 272        }
 273}
 274
 275/*
 276 * Temperature registers and conversions
 277 */
 278
 279#define PC87427_REG_TEMP_STATUS         0x10
 280#define PC87427_REG_TEMP                0x14
 281#define PC87427_REG_TEMP_MAX            0x18
 282#define PC87427_REG_TEMP_MIN            0x19
 283#define PC87427_REG_TEMP_CRIT           0x1a
 284#define PC87427_REG_TEMP_TYPE           0x1d
 285
 286#define TEMP_STATUS_CHANEN              (1 << 0)
 287#define TEMP_STATUS_LOWFLG              (1 << 1)
 288#define TEMP_STATUS_HIGHFLG             (1 << 2)
 289#define TEMP_STATUS_CRITFLG             (1 << 3)
 290#define TEMP_STATUS_SENSERR             (1 << 5)
 291#define TEMP_TYPE_MASK                  (3 << 5)
 292
 293#define TEMP_TYPE_THERMISTOR            (1 << 5)
 294#define TEMP_TYPE_REMOTE_DIODE          (2 << 5)
 295#define TEMP_TYPE_LOCAL_DIODE           (3 << 5)
 296
 297/*
 298 * Dedicated function to read all registers related to a given temperature
 299 * input. This saves us quite a few locks and bank selections.
 300 * Must be called with data->lock held.
 301 * nr is from 0 to 5
 302 */
 303static void pc87427_readall_temp(struct pc87427_data *data, u8 nr)
 304{
 305        int iobase = data->address[LD_TEMP];
 306
 307        outb(BANK_TM(nr), iobase + PC87427_REG_BANK);
 308        data->temp[nr] = le16_to_cpu(inw(iobase + PC87427_REG_TEMP));
 309        data->temp_max[nr] = inb(iobase + PC87427_REG_TEMP_MAX);
 310        data->temp_min[nr] = inb(iobase + PC87427_REG_TEMP_MIN);
 311        data->temp_crit[nr] = inb(iobase + PC87427_REG_TEMP_CRIT);
 312        data->temp_type[nr] = inb(iobase + PC87427_REG_TEMP_TYPE);
 313        data->temp_status[nr] = inb(iobase + PC87427_REG_TEMP_STATUS);
 314        /* Clear fan alarm bits */
 315        outb(data->temp_status[nr], iobase + PC87427_REG_TEMP_STATUS);
 316}
 317
 318static inline unsigned int temp_type_from_reg(u8 reg)
 319{
 320        switch (reg & TEMP_TYPE_MASK) {
 321        case TEMP_TYPE_THERMISTOR:
 322                return 4;
 323        case TEMP_TYPE_REMOTE_DIODE:
 324        case TEMP_TYPE_LOCAL_DIODE:
 325                return 3;
 326        default:
 327                return 0;
 328        }
 329}
 330
 331/*
 332 * We assume 8-bit thermal sensors; 9-bit thermal sensors are possible
 333 * too, but I have no idea how to figure out when they are used.
 334 */
 335static inline long temp_from_reg(s16 reg)
 336{
 337        return reg * 1000 / 256;
 338}
 339
 340static inline long temp_from_reg8(s8 reg)
 341{
 342        return reg * 1000;
 343}
 344
 345/*
 346 * Data interface
 347 */
 348
 349static struct pc87427_data *pc87427_update_device(struct device *dev)
 350{
 351        struct pc87427_data *data = dev_get_drvdata(dev);
 352        int i;
 353
 354        mutex_lock(&data->lock);
 355        if (!time_after(jiffies, data->last_updated + HZ)
 356         && data->last_updated)
 357                goto done;
 358
 359        /* Fans */
 360        for (i = 0; i < 8; i++) {
 361                if (!(data->fan_enabled & (1 << i)))
 362                        continue;
 363                pc87427_readall_fan(data, i);
 364        }
 365
 366        /* PWM outputs */
 367        for (i = 0; i < 4; i++) {
 368                if (!(data->pwm_enabled & (1 << i)))
 369                        continue;
 370                pc87427_readall_pwm(data, i);
 371        }
 372
 373        /* Temperature channels */
 374        for (i = 0; i < 6; i++) {
 375                if (!(data->temp_enabled & (1 << i)))
 376                        continue;
 377                pc87427_readall_temp(data, i);
 378        }
 379
 380        data->last_updated = jiffies;
 381
 382done:
 383        mutex_unlock(&data->lock);
 384        return data;
 385}
 386
 387static ssize_t show_fan_input(struct device *dev, struct device_attribute
 388                              *devattr, char *buf)
 389{
 390        struct pc87427_data *data = pc87427_update_device(dev);
 391        int nr = to_sensor_dev_attr(devattr)->index;
 392
 393        return sprintf(buf, "%lu\n", fan_from_reg(data->fan[nr]));
 394}
 395
 396static ssize_t show_fan_min(struct device *dev, struct device_attribute
 397                            *devattr, char *buf)
 398{
 399        struct pc87427_data *data = pc87427_update_device(dev);
 400        int nr = to_sensor_dev_attr(devattr)->index;
 401
 402        return sprintf(buf, "%lu\n", fan_from_reg(data->fan_min[nr]));
 403}
 404
 405static ssize_t show_fan_alarm(struct device *dev, struct device_attribute
 406                              *devattr, char *buf)
 407{
 408        struct pc87427_data *data = pc87427_update_device(dev);
 409        int nr = to_sensor_dev_attr(devattr)->index;
 410
 411        return sprintf(buf, "%d\n", !!(data->fan_status[nr]
 412                                       & FAN_STATUS_LOSPD));
 413}
 414
 415static ssize_t show_fan_fault(struct device *dev, struct device_attribute
 416                              *devattr, char *buf)
 417{
 418        struct pc87427_data *data = pc87427_update_device(dev);
 419        int nr = to_sensor_dev_attr(devattr)->index;
 420
 421        return sprintf(buf, "%d\n", !!(data->fan_status[nr]
 422                                       & FAN_STATUS_STALL));
 423}
 424
 425static ssize_t set_fan_min(struct device *dev, struct device_attribute
 426                           *devattr, const char *buf, size_t count)
 427{
 428        struct pc87427_data *data = dev_get_drvdata(dev);
 429        int nr = to_sensor_dev_attr(devattr)->index;
 430        unsigned long val;
 431        int iobase = data->address[LD_FAN];
 432
 433        if (kstrtoul(buf, 10, &val) < 0)
 434                return -EINVAL;
 435
 436        mutex_lock(&data->lock);
 437        outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
 438        /*
 439         * The low speed limit registers are read-only while monitoring
 440         * is enabled, so we have to disable monitoring, then change the
 441         * limit, and finally enable monitoring again.
 442         */
 443        outb(0, iobase + PC87427_REG_FAN_STATUS);
 444        data->fan_min[nr] = fan_to_reg(val);
 445        outw(data->fan_min[nr], iobase + PC87427_REG_FAN_MIN);
 446        outb(FAN_STATUS_MONEN, iobase + PC87427_REG_FAN_STATUS);
 447        mutex_unlock(&data->lock);
 448
 449        return count;
 450}
 451
 452static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
 453static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
 454static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan_input, NULL, 2);
 455static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan_input, NULL, 3);
 456static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan_input, NULL, 4);
 457static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan_input, NULL, 5);
 458static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan_input, NULL, 6);
 459static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, show_fan_input, NULL, 7);
 460
 461static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
 462                          show_fan_min, set_fan_min, 0);
 463static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
 464                          show_fan_min, set_fan_min, 1);
 465static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO,
 466                          show_fan_min, set_fan_min, 2);
 467static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO,
 468                          show_fan_min, set_fan_min, 3);
 469static SENSOR_DEVICE_ATTR(fan5_min, S_IWUSR | S_IRUGO,
 470                          show_fan_min, set_fan_min, 4);
 471static SENSOR_DEVICE_ATTR(fan6_min, S_IWUSR | S_IRUGO,
 472                          show_fan_min, set_fan_min, 5);
 473static SENSOR_DEVICE_ATTR(fan7_min, S_IWUSR | S_IRUGO,
 474                          show_fan_min, set_fan_min, 6);
 475static SENSOR_DEVICE_ATTR(fan8_min, S_IWUSR | S_IRUGO,
 476                          show_fan_min, set_fan_min, 7);
 477
 478static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_fan_alarm, NULL, 0);
 479static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_fan_alarm, NULL, 1);
 480static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_fan_alarm, NULL, 2);
 481static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_fan_alarm, NULL, 3);
 482static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_fan_alarm, NULL, 4);
 483static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_fan_alarm, NULL, 5);
 484static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO, show_fan_alarm, NULL, 6);
 485static SENSOR_DEVICE_ATTR(fan8_alarm, S_IRUGO, show_fan_alarm, NULL, 7);
 486
 487static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
 488static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
 489static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
 490static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
 491static SENSOR_DEVICE_ATTR(fan5_fault, S_IRUGO, show_fan_fault, NULL, 4);
 492static SENSOR_DEVICE_ATTR(fan6_fault, S_IRUGO, show_fan_fault, NULL, 5);
 493static SENSOR_DEVICE_ATTR(fan7_fault, S_IRUGO, show_fan_fault, NULL, 6);
 494static SENSOR_DEVICE_ATTR(fan8_fault, S_IRUGO, show_fan_fault, NULL, 7);
 495
 496static struct attribute *pc87427_attributes_fan[8][5] = {
 497        {
 498                &sensor_dev_attr_fan1_input.dev_attr.attr,
 499                &sensor_dev_attr_fan1_min.dev_attr.attr,
 500                &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 501                &sensor_dev_attr_fan1_fault.dev_attr.attr,
 502                NULL
 503        }, {
 504                &sensor_dev_attr_fan2_input.dev_attr.attr,
 505                &sensor_dev_attr_fan2_min.dev_attr.attr,
 506                &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 507                &sensor_dev_attr_fan2_fault.dev_attr.attr,
 508                NULL
 509        }, {
 510                &sensor_dev_attr_fan3_input.dev_attr.attr,
 511                &sensor_dev_attr_fan3_min.dev_attr.attr,
 512                &sensor_dev_attr_fan3_alarm.dev_attr.attr,
 513                &sensor_dev_attr_fan3_fault.dev_attr.attr,
 514                NULL
 515        }, {
 516                &sensor_dev_attr_fan4_input.dev_attr.attr,
 517                &sensor_dev_attr_fan4_min.dev_attr.attr,
 518                &sensor_dev_attr_fan4_alarm.dev_attr.attr,
 519                &sensor_dev_attr_fan4_fault.dev_attr.attr,
 520                NULL
 521        }, {
 522                &sensor_dev_attr_fan5_input.dev_attr.attr,
 523                &sensor_dev_attr_fan5_min.dev_attr.attr,
 524                &sensor_dev_attr_fan5_alarm.dev_attr.attr,
 525                &sensor_dev_attr_fan5_fault.dev_attr.attr,
 526                NULL
 527        }, {
 528                &sensor_dev_attr_fan6_input.dev_attr.attr,
 529                &sensor_dev_attr_fan6_min.dev_attr.attr,
 530                &sensor_dev_attr_fan6_alarm.dev_attr.attr,
 531                &sensor_dev_attr_fan6_fault.dev_attr.attr,
 532                NULL
 533        }, {
 534                &sensor_dev_attr_fan7_input.dev_attr.attr,
 535                &sensor_dev_attr_fan7_min.dev_attr.attr,
 536                &sensor_dev_attr_fan7_alarm.dev_attr.attr,
 537                &sensor_dev_attr_fan7_fault.dev_attr.attr,
 538                NULL
 539        }, {
 540                &sensor_dev_attr_fan8_input.dev_attr.attr,
 541                &sensor_dev_attr_fan8_min.dev_attr.attr,
 542                &sensor_dev_attr_fan8_alarm.dev_attr.attr,
 543                &sensor_dev_attr_fan8_fault.dev_attr.attr,
 544                NULL
 545        }
 546};
 547
 548static const struct attribute_group pc87427_group_fan[8] = {
 549        { .attrs = pc87427_attributes_fan[0] },
 550        { .attrs = pc87427_attributes_fan[1] },
 551        { .attrs = pc87427_attributes_fan[2] },
 552        { .attrs = pc87427_attributes_fan[3] },
 553        { .attrs = pc87427_attributes_fan[4] },
 554        { .attrs = pc87427_attributes_fan[5] },
 555        { .attrs = pc87427_attributes_fan[6] },
 556        { .attrs = pc87427_attributes_fan[7] },
 557};
 558
 559/*
 560 * Must be called with data->lock held and pc87427_readall_pwm() freshly
 561 * called
 562 */
 563static void update_pwm_enable(struct pc87427_data *data, int nr, u8 mode)
 564{
 565        int iobase = data->address[LD_FAN];
 566        data->pwm_enable[nr] &= ~PWM_ENABLE_MODE_MASK;
 567        data->pwm_enable[nr] |= mode;
 568        outb(data->pwm_enable[nr], iobase + PC87427_REG_PWM_ENABLE);
 569}
 570
 571static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
 572                               *devattr, char *buf)
 573{
 574        struct pc87427_data *data = pc87427_update_device(dev);
 575        int nr = to_sensor_dev_attr(devattr)->index;
 576        int pwm_enable;
 577
 578        pwm_enable = pwm_enable_from_reg(data->pwm_enable[nr]);
 579        if (pwm_enable < 0)
 580                return pwm_enable;
 581        return sprintf(buf, "%d\n", pwm_enable);
 582}
 583
 584static ssize_t set_pwm_enable(struct device *dev, struct device_attribute
 585                              *devattr, const char *buf, size_t count)
 586{
 587        struct pc87427_data *data = dev_get_drvdata(dev);
 588        int nr = to_sensor_dev_attr(devattr)->index;
 589        unsigned long val;
 590
 591        if (kstrtoul(buf, 10, &val) < 0 || val > 2)
 592                return -EINVAL;
 593        /* Can't go to automatic mode if it isn't configured */
 594        if (val == 2 && !(data->pwm_auto_ok & (1 << nr)))
 595                return -EINVAL;
 596
 597        mutex_lock(&data->lock);
 598        pc87427_readall_pwm(data, nr);
 599        update_pwm_enable(data, nr, pwm_enable_to_reg(val, data->pwm[nr]));
 600        mutex_unlock(&data->lock);
 601
 602        return count;
 603}
 604
 605static ssize_t show_pwm(struct device *dev, struct device_attribute
 606                        *devattr, char *buf)
 607{
 608        struct pc87427_data *data = pc87427_update_device(dev);
 609        int nr = to_sensor_dev_attr(devattr)->index;
 610
 611        return sprintf(buf, "%d\n", (int)data->pwm[nr]);
 612}
 613
 614static ssize_t set_pwm(struct device *dev, struct device_attribute
 615                       *devattr, const char *buf, size_t count)
 616{
 617        struct pc87427_data *data = dev_get_drvdata(dev);
 618        int nr = to_sensor_dev_attr(devattr)->index;
 619        unsigned long val;
 620        int iobase = data->address[LD_FAN];
 621        u8 mode;
 622
 623        if (kstrtoul(buf, 10, &val) < 0 || val > 0xff)
 624                return -EINVAL;
 625
 626        mutex_lock(&data->lock);
 627        pc87427_readall_pwm(data, nr);
 628        mode = data->pwm_enable[nr] & PWM_ENABLE_MODE_MASK;
 629        if (mode != PWM_MODE_MANUAL && mode != PWM_MODE_OFF) {
 630                dev_notice(dev,
 631                           "Can't set PWM%d duty cycle while not in manual mode\n",
 632                           nr + 1);
 633                mutex_unlock(&data->lock);
 634                return -EPERM;
 635        }
 636
 637        /* We may have to change the mode */
 638        if (mode == PWM_MODE_MANUAL && val == 0) {
 639                /* Transition from Manual to Off */
 640                update_pwm_enable(data, nr, PWM_MODE_OFF);
 641                mode = PWM_MODE_OFF;
 642                dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
 643                        "manual", "off");
 644        } else if (mode == PWM_MODE_OFF && val != 0) {
 645                /* Transition from Off to Manual */
 646                update_pwm_enable(data, nr, PWM_MODE_MANUAL);
 647                mode = PWM_MODE_MANUAL;
 648                dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
 649                        "off", "manual");
 650        }
 651
 652        data->pwm[nr] = val;
 653        if (mode == PWM_MODE_MANUAL)
 654                outb(val, iobase + PC87427_REG_PWM_DUTY);
 655        mutex_unlock(&data->lock);
 656
 657        return count;
 658}
 659
 660static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
 661                          show_pwm_enable, set_pwm_enable, 0);
 662static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO,
 663                          show_pwm_enable, set_pwm_enable, 1);
 664static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO,
 665                          show_pwm_enable, set_pwm_enable, 2);
 666static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO,
 667                          show_pwm_enable, set_pwm_enable, 3);
 668
 669static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
 670static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
 671static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
 672static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3);
 673
 674static struct attribute *pc87427_attributes_pwm[4][3] = {
 675        {
 676                &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 677                &sensor_dev_attr_pwm1.dev_attr.attr,
 678                NULL
 679        }, {
 680                &sensor_dev_attr_pwm2_enable.dev_attr.attr,
 681                &sensor_dev_attr_pwm2.dev_attr.attr,
 682                NULL
 683        }, {
 684                &sensor_dev_attr_pwm3_enable.dev_attr.attr,
 685                &sensor_dev_attr_pwm3.dev_attr.attr,
 686                NULL
 687        }, {
 688                &sensor_dev_attr_pwm4_enable.dev_attr.attr,
 689                &sensor_dev_attr_pwm4.dev_attr.attr,
 690                NULL
 691        }
 692};
 693
 694static const struct attribute_group pc87427_group_pwm[4] = {
 695        { .attrs = pc87427_attributes_pwm[0] },
 696        { .attrs = pc87427_attributes_pwm[1] },
 697        { .attrs = pc87427_attributes_pwm[2] },
 698        { .attrs = pc87427_attributes_pwm[3] },
 699};
 700
 701static ssize_t show_temp_input(struct device *dev, struct device_attribute
 702                               *devattr, char *buf)
 703{
 704        struct pc87427_data *data = pc87427_update_device(dev);
 705        int nr = to_sensor_dev_attr(devattr)->index;
 706
 707        return sprintf(buf, "%ld\n", temp_from_reg(data->temp[nr]));
 708}
 709
 710static ssize_t show_temp_min(struct device *dev, struct device_attribute
 711                             *devattr, char *buf)
 712{
 713        struct pc87427_data *data = pc87427_update_device(dev);
 714        int nr = to_sensor_dev_attr(devattr)->index;
 715
 716        return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_min[nr]));
 717}
 718
 719static ssize_t show_temp_max(struct device *dev, struct device_attribute
 720                             *devattr, char *buf)
 721{
 722        struct pc87427_data *data = pc87427_update_device(dev);
 723        int nr = to_sensor_dev_attr(devattr)->index;
 724
 725        return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_max[nr]));
 726}
 727
 728static ssize_t show_temp_crit(struct device *dev, struct device_attribute
 729                              *devattr, char *buf)
 730{
 731        struct pc87427_data *data = pc87427_update_device(dev);
 732        int nr = to_sensor_dev_attr(devattr)->index;
 733
 734        return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_crit[nr]));
 735}
 736
 737static ssize_t show_temp_type(struct device *dev, struct device_attribute
 738                              *devattr, char *buf)
 739{
 740        struct pc87427_data *data = pc87427_update_device(dev);
 741        int nr = to_sensor_dev_attr(devattr)->index;
 742
 743        return sprintf(buf, "%u\n", temp_type_from_reg(data->temp_type[nr]));
 744}
 745
 746static ssize_t show_temp_min_alarm(struct device *dev, struct device_attribute
 747                                   *devattr, char *buf)
 748{
 749        struct pc87427_data *data = pc87427_update_device(dev);
 750        int nr = to_sensor_dev_attr(devattr)->index;
 751
 752        return sprintf(buf, "%d\n", !!(data->temp_status[nr]
 753                                       & TEMP_STATUS_LOWFLG));
 754}
 755
 756static ssize_t show_temp_max_alarm(struct device *dev, struct device_attribute
 757                                   *devattr, char *buf)
 758{
 759        struct pc87427_data *data = pc87427_update_device(dev);
 760        int nr = to_sensor_dev_attr(devattr)->index;
 761
 762        return sprintf(buf, "%d\n", !!(data->temp_status[nr]
 763                                       & TEMP_STATUS_HIGHFLG));
 764}
 765
 766static ssize_t show_temp_crit_alarm(struct device *dev, struct device_attribute
 767                                   *devattr, char *buf)
 768{
 769        struct pc87427_data *data = pc87427_update_device(dev);
 770        int nr = to_sensor_dev_attr(devattr)->index;
 771
 772        return sprintf(buf, "%d\n", !!(data->temp_status[nr]
 773                                       & TEMP_STATUS_CRITFLG));
 774}
 775
 776static ssize_t show_temp_fault(struct device *dev, struct device_attribute
 777                               *devattr, char *buf)
 778{
 779        struct pc87427_data *data = pc87427_update_device(dev);
 780        int nr = to_sensor_dev_attr(devattr)->index;
 781
 782        return sprintf(buf, "%d\n", !!(data->temp_status[nr]
 783                                       & TEMP_STATUS_SENSERR));
 784}
 785
 786static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL, 0);
 787static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input, NULL, 1);
 788static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_input, NULL, 2);
 789static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_input, NULL, 3);
 790static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp_input, NULL, 4);
 791static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp_input, NULL, 5);
 792
 793static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO, show_temp_min, NULL, 0);
 794static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO, show_temp_min, NULL, 1);
 795static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO, show_temp_min, NULL, 2);
 796static SENSOR_DEVICE_ATTR(temp4_min, S_IRUGO, show_temp_min, NULL, 3);
 797static SENSOR_DEVICE_ATTR(temp5_min, S_IRUGO, show_temp_min, NULL, 4);
 798static SENSOR_DEVICE_ATTR(temp6_min, S_IRUGO, show_temp_min, NULL, 5);
 799
 800static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0);
 801static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1);
 802static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2);
 803static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3);
 804static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4);
 805static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5);
 806
 807static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0);
 808static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1);
 809static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2);
 810static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3);
 811static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4);
 812static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5);
 813
 814static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO, show_temp_type, NULL, 0);
 815static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO, show_temp_type, NULL, 1);
 816static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO, show_temp_type, NULL, 2);
 817static SENSOR_DEVICE_ATTR(temp4_type, S_IRUGO, show_temp_type, NULL, 3);
 818static SENSOR_DEVICE_ATTR(temp5_type, S_IRUGO, show_temp_type, NULL, 4);
 819static SENSOR_DEVICE_ATTR(temp6_type, S_IRUGO, show_temp_type, NULL, 5);
 820
 821static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO,
 822                          show_temp_min_alarm, NULL, 0);
 823static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO,
 824                          show_temp_min_alarm, NULL, 1);
 825static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO,
 826                          show_temp_min_alarm, NULL, 2);
 827static SENSOR_DEVICE_ATTR(temp4_min_alarm, S_IRUGO,
 828                          show_temp_min_alarm, NULL, 3);
 829static SENSOR_DEVICE_ATTR(temp5_min_alarm, S_IRUGO,
 830                          show_temp_min_alarm, NULL, 4);
 831static SENSOR_DEVICE_ATTR(temp6_min_alarm, S_IRUGO,
 832                          show_temp_min_alarm, NULL, 5);
 833
 834static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO,
 835                          show_temp_max_alarm, NULL, 0);
 836static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO,
 837                          show_temp_max_alarm, NULL, 1);
 838static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO,
 839                          show_temp_max_alarm, NULL, 2);
 840static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO,
 841                          show_temp_max_alarm, NULL, 3);
 842static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO,
 843                          show_temp_max_alarm, NULL, 4);
 844static SENSOR_DEVICE_ATTR(temp6_max_alarm, S_IRUGO,
 845                          show_temp_max_alarm, NULL, 5);
 846
 847static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO,
 848                          show_temp_crit_alarm, NULL, 0);
 849static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO,
 850                          show_temp_crit_alarm, NULL, 1);
 851static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO,
 852                          show_temp_crit_alarm, NULL, 2);
 853static SENSOR_DEVICE_ATTR(temp4_crit_alarm, S_IRUGO,
 854                          show_temp_crit_alarm, NULL, 3);
 855static SENSOR_DEVICE_ATTR(temp5_crit_alarm, S_IRUGO,
 856                          show_temp_crit_alarm, NULL, 4);
 857static SENSOR_DEVICE_ATTR(temp6_crit_alarm, S_IRUGO,
 858                          show_temp_crit_alarm, NULL, 5);
 859
 860static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
 861static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
 862static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
 863static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
 864static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
 865static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
 866
 867static struct attribute *pc87427_attributes_temp[6][10] = {
 868        {
 869                &sensor_dev_attr_temp1_input.dev_attr.attr,
 870                &sensor_dev_attr_temp1_min.dev_attr.attr,
 871                &sensor_dev_attr_temp1_max.dev_attr.attr,
 872                &sensor_dev_attr_temp1_crit.dev_attr.attr,
 873                &sensor_dev_attr_temp1_type.dev_attr.attr,
 874                &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
 875                &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
 876                &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
 877                &sensor_dev_attr_temp1_fault.dev_attr.attr,
 878                NULL
 879        }, {
 880                &sensor_dev_attr_temp2_input.dev_attr.attr,
 881                &sensor_dev_attr_temp2_min.dev_attr.attr,
 882                &sensor_dev_attr_temp2_max.dev_attr.attr,
 883                &sensor_dev_attr_temp2_crit.dev_attr.attr,
 884                &sensor_dev_attr_temp2_type.dev_attr.attr,
 885                &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
 886                &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
 887                &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
 888                &sensor_dev_attr_temp2_fault.dev_attr.attr,
 889                NULL
 890        }, {
 891                &sensor_dev_attr_temp3_input.dev_attr.attr,
 892                &sensor_dev_attr_temp3_min.dev_attr.attr,
 893                &sensor_dev_attr_temp3_max.dev_attr.attr,
 894                &sensor_dev_attr_temp3_crit.dev_attr.attr,
 895                &sensor_dev_attr_temp3_type.dev_attr.attr,
 896                &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
 897                &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
 898                &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
 899                &sensor_dev_attr_temp3_fault.dev_attr.attr,
 900                NULL
 901        }, {
 902                &sensor_dev_attr_temp4_input.dev_attr.attr,
 903                &sensor_dev_attr_temp4_min.dev_attr.attr,
 904                &sensor_dev_attr_temp4_max.dev_attr.attr,
 905                &sensor_dev_attr_temp4_crit.dev_attr.attr,
 906                &sensor_dev_attr_temp4_type.dev_attr.attr,
 907                &sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
 908                &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
 909                &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
 910                &sensor_dev_attr_temp4_fault.dev_attr.attr,
 911                NULL
 912        }, {
 913                &sensor_dev_attr_temp5_input.dev_attr.attr,
 914                &sensor_dev_attr_temp5_min.dev_attr.attr,
 915                &sensor_dev_attr_temp5_max.dev_attr.attr,
 916                &sensor_dev_attr_temp5_crit.dev_attr.attr,
 917                &sensor_dev_attr_temp5_type.dev_attr.attr,
 918                &sensor_dev_attr_temp5_min_alarm.dev_attr.attr,
 919                &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
 920                &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
 921                &sensor_dev_attr_temp5_fault.dev_attr.attr,
 922                NULL
 923        }, {
 924                &sensor_dev_attr_temp6_input.dev_attr.attr,
 925                &sensor_dev_attr_temp6_min.dev_attr.attr,
 926                &sensor_dev_attr_temp6_max.dev_attr.attr,
 927                &sensor_dev_attr_temp6_crit.dev_attr.attr,
 928                &sensor_dev_attr_temp6_type.dev_attr.attr,
 929                &sensor_dev_attr_temp6_min_alarm.dev_attr.attr,
 930                &sensor_dev_attr_temp6_max_alarm.dev_attr.attr,
 931                &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr,
 932                &sensor_dev_attr_temp6_fault.dev_attr.attr,
 933                NULL
 934        }
 935};
 936
 937static const struct attribute_group pc87427_group_temp[6] = {
 938        { .attrs = pc87427_attributes_temp[0] },
 939        { .attrs = pc87427_attributes_temp[1] },
 940        { .attrs = pc87427_attributes_temp[2] },
 941        { .attrs = pc87427_attributes_temp[3] },
 942        { .attrs = pc87427_attributes_temp[4] },
 943        { .attrs = pc87427_attributes_temp[5] },
 944};
 945
 946static ssize_t show_name(struct device *dev, struct device_attribute
 947                         *devattr, char *buf)
 948{
 949        struct pc87427_data *data = dev_get_drvdata(dev);
 950
 951        return sprintf(buf, "%s\n", data->name);
 952}
 953static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
 954
 955
 956/*
 957 * Device detection, attach and detach
 958 */
 959
 960static int pc87427_request_regions(struct platform_device *pdev,
 961                                             int count)
 962{
 963        struct resource *res;
 964        int i;
 965
 966        for (i = 0; i < count; i++) {
 967                res = platform_get_resource(pdev, IORESOURCE_IO, i);
 968                if (!res) {
 969                        dev_err(&pdev->dev, "Missing resource #%d\n", i);
 970                        return -ENOENT;
 971                }
 972                if (!devm_request_region(&pdev->dev, res->start,
 973                                         resource_size(res), DRVNAME)) {
 974                        dev_err(&pdev->dev,
 975                                "Failed to request region 0x%lx-0x%lx\n",
 976                                (unsigned long)res->start,
 977                                (unsigned long)res->end);
 978                        return -EBUSY;
 979                }
 980        }
 981        return 0;
 982}
 983
 984static void pc87427_init_device(struct device *dev)
 985{
 986        struct pc87427_sio_data *sio_data = dev->platform_data;
 987        struct pc87427_data *data = dev_get_drvdata(dev);
 988        int i;
 989        u8 reg;
 990
 991        /* The FMC module should be ready */
 992        reg = pc87427_read8(data, LD_FAN, PC87427_REG_BANK);
 993        if (!(reg & 0x80))
 994                dev_warn(dev, "%s module not ready!\n", "FMC");
 995
 996        /* Check which fans are enabled */
 997        for (i = 0; i < 8; i++) {
 998                if (!(sio_data->has_fanin & (1 << i)))  /* Not wired */
 999                        continue;
1000                reg = pc87427_read8_bank(data, LD_FAN, BANK_FM(i),
1001                                         PC87427_REG_FAN_STATUS);
1002                if (reg & FAN_STATUS_MONEN)
1003                        data->fan_enabled |= (1 << i);
1004        }
1005
1006        if (!data->fan_enabled) {
1007                dev_dbg(dev, "Enabling monitoring of all fans\n");
1008                for (i = 0; i < 8; i++) {
1009                        if (!(sio_data->has_fanin & (1 << i)))  /* Not wired */
1010                                continue;
1011                        pc87427_write8_bank(data, LD_FAN, BANK_FM(i),
1012                                            PC87427_REG_FAN_STATUS,
1013                                            FAN_STATUS_MONEN);
1014                }
1015                data->fan_enabled = sio_data->has_fanin;
1016        }
1017
1018        /* Check which PWM outputs are enabled */
1019        for (i = 0; i < 4; i++) {
1020                if (!(sio_data->has_fanout & (1 << i))) /* Not wired */
1021                        continue;
1022                reg = pc87427_read8_bank(data, LD_FAN, BANK_FC(i),
1023                                         PC87427_REG_PWM_ENABLE);
1024                if (reg & PWM_ENABLE_CTLEN)
1025                        data->pwm_enabled |= (1 << i);
1026
1027                /*
1028                 * We don't expose an interface to reconfigure the automatic
1029                 * fan control mode, so only allow to return to this mode if
1030                 * it was originally set.
1031                 */
1032                if ((reg & PWM_ENABLE_MODE_MASK) == PWM_MODE_AUTO) {
1033                        dev_dbg(dev, "PWM%d is in automatic control mode\n",
1034                                i + 1);
1035                        data->pwm_auto_ok |= (1 << i);
1036                }
1037        }
1038
1039        /* The HMC module should be ready */
1040        reg = pc87427_read8(data, LD_TEMP, PC87427_REG_BANK);
1041        if (!(reg & 0x80))
1042                dev_warn(dev, "%s module not ready!\n", "HMC");
1043
1044        /* Check which temperature channels are enabled */
1045        for (i = 0; i < 6; i++) {
1046                reg = pc87427_read8_bank(data, LD_TEMP, BANK_TM(i),
1047                                         PC87427_REG_TEMP_STATUS);
1048                if (reg & TEMP_STATUS_CHANEN)
1049                        data->temp_enabled |= (1 << i);
1050        }
1051}
1052
1053static void pc87427_remove_files(struct device *dev)
1054{
1055        struct pc87427_data *data = dev_get_drvdata(dev);
1056        int i;
1057
1058        device_remove_file(dev, &dev_attr_name);
1059        for (i = 0; i < 8; i++) {
1060                if (!(data->fan_enabled & (1 << i)))
1061                        continue;
1062                sysfs_remove_group(&dev->kobj, &pc87427_group_fan[i]);
1063        }
1064        for (i = 0; i < 4; i++) {
1065                if (!(data->pwm_enabled & (1 << i)))
1066                        continue;
1067                sysfs_remove_group(&dev->kobj, &pc87427_group_pwm[i]);
1068        }
1069        for (i = 0; i < 6; i++) {
1070                if (!(data->temp_enabled & (1 << i)))
1071                        continue;
1072                sysfs_remove_group(&dev->kobj, &pc87427_group_temp[i]);
1073        }
1074}
1075
1076static int pc87427_probe(struct platform_device *pdev)
1077{
1078        struct pc87427_sio_data *sio_data = pdev->dev.platform_data;
1079        struct pc87427_data *data;
1080        int i, err, res_count;
1081
1082        data = devm_kzalloc(&pdev->dev, sizeof(struct pc87427_data),
1083                            GFP_KERNEL);
1084        if (!data) {
1085                pr_err("Out of memory\n");
1086                return -ENOMEM;
1087        }
1088
1089        data->address[0] = sio_data->address[0];
1090        data->address[1] = sio_data->address[1];
1091        res_count = (data->address[0] != 0) + (data->address[1] != 0);
1092
1093        err = pc87427_request_regions(pdev, res_count);
1094        if (err)
1095                return err;
1096
1097        mutex_init(&data->lock);
1098        data->name = "pc87427";
1099        platform_set_drvdata(pdev, data);
1100        pc87427_init_device(&pdev->dev);
1101
1102        /* Register sysfs hooks */
1103        err = device_create_file(&pdev->dev, &dev_attr_name);
1104        if (err)
1105                return err;
1106        for (i = 0; i < 8; i++) {
1107                if (!(data->fan_enabled & (1 << i)))
1108                        continue;
1109                err = sysfs_create_group(&pdev->dev.kobj,
1110                                         &pc87427_group_fan[i]);
1111                if (err)
1112                        goto exit_remove_files;
1113        }
1114        for (i = 0; i < 4; i++) {
1115                if (!(data->pwm_enabled & (1 << i)))
1116                        continue;
1117                err = sysfs_create_group(&pdev->dev.kobj,
1118                                         &pc87427_group_pwm[i]);
1119                if (err)
1120                        goto exit_remove_files;
1121        }
1122        for (i = 0; i < 6; i++) {
1123                if (!(data->temp_enabled & (1 << i)))
1124                        continue;
1125                err = sysfs_create_group(&pdev->dev.kobj,
1126                                         &pc87427_group_temp[i]);
1127                if (err)
1128                        goto exit_remove_files;
1129        }
1130
1131        data->hwmon_dev = hwmon_device_register(&pdev->dev);
1132        if (IS_ERR(data->hwmon_dev)) {
1133                err = PTR_ERR(data->hwmon_dev);
1134                dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
1135                goto exit_remove_files;
1136        }
1137
1138        return 0;
1139
1140exit_remove_files:
1141        pc87427_remove_files(&pdev->dev);
1142        return err;
1143}
1144
1145static int pc87427_remove(struct platform_device *pdev)
1146{
1147        struct pc87427_data *data = platform_get_drvdata(pdev);
1148
1149        hwmon_device_unregister(data->hwmon_dev);
1150        pc87427_remove_files(&pdev->dev);
1151
1152        return 0;
1153}
1154
1155
1156static struct platform_driver pc87427_driver = {
1157        .driver = {
1158                .owner  = THIS_MODULE,
1159                .name   = DRVNAME,
1160        },
1161        .probe          = pc87427_probe,
1162        .remove         = pc87427_remove,
1163};
1164
1165static int __init pc87427_device_add(const struct pc87427_sio_data *sio_data)
1166{
1167        struct resource res[2] = {
1168                { .flags        = IORESOURCE_IO },
1169                { .flags        = IORESOURCE_IO },
1170        };
1171        int err, i, res_count;
1172
1173        res_count = 0;
1174        for (i = 0; i < 2; i++) {
1175                if (!sio_data->address[i])
1176                        continue;
1177                res[res_count].start = sio_data->address[i];
1178                res[res_count].end = sio_data->address[i] + REGION_LENGTH - 1;
1179                res[res_count].name = logdev_str[i];
1180
1181                err = acpi_check_resource_conflict(&res[res_count]);
1182                if (err)
1183                        goto exit;
1184
1185                res_count++;
1186        }
1187
1188        pdev = platform_device_alloc(DRVNAME, res[0].start);
1189        if (!pdev) {
1190                err = -ENOMEM;
1191                pr_err("Device allocation failed\n");
1192                goto exit;
1193        }
1194
1195        err = platform_device_add_resources(pdev, res, res_count);
1196        if (err) {
1197                pr_err("Device resource addition failed (%d)\n", err);
1198                goto exit_device_put;
1199        }
1200
1201        err = platform_device_add_data(pdev, sio_data,
1202                                       sizeof(struct pc87427_sio_data));
1203        if (err) {
1204                pr_err("Platform data allocation failed\n");
1205                goto exit_device_put;
1206        }
1207
1208        err = platform_device_add(pdev);
1209        if (err) {
1210                pr_err("Device addition failed (%d)\n", err);
1211                goto exit_device_put;
1212        }
1213
1214        return 0;
1215
1216exit_device_put:
1217        platform_device_put(pdev);
1218exit:
1219        return err;
1220}
1221
1222static int __init pc87427_find(int sioaddr, struct pc87427_sio_data *sio_data)
1223{
1224        u16 val;
1225        u8 cfg, cfg_b;
1226        int i, err = 0;
1227
1228        /* Identify device */
1229        val = force_id ? force_id : superio_inb(sioaddr, SIOREG_DEVID);
1230        if (val != 0xf2) {      /* PC87427 */
1231                err = -ENODEV;
1232                goto exit;
1233        }
1234
1235        for (i = 0; i < 2; i++) {
1236                sio_data->address[i] = 0;
1237                /* Select logical device */
1238                superio_outb(sioaddr, SIOREG_LDSEL, logdev[i]);
1239
1240                val = superio_inb(sioaddr, SIOREG_ACT);
1241                if (!(val & 0x01)) {
1242                        pr_info("Logical device 0x%02x not activated\n",
1243                                logdev[i]);
1244                        continue;
1245                }
1246
1247                val = superio_inb(sioaddr, SIOREG_MAP);
1248                if (val & 0x01) {
1249                        pr_warn("Logical device 0x%02x is memory-mapped, can't use\n",
1250                                logdev[i]);
1251                        continue;
1252                }
1253
1254                val = (superio_inb(sioaddr, SIOREG_IOBASE) << 8)
1255                    | superio_inb(sioaddr, SIOREG_IOBASE + 1);
1256                if (!val) {
1257                        pr_info("I/O base address not set for logical device 0x%02x\n",
1258                                logdev[i]);
1259                        continue;
1260                }
1261                sio_data->address[i] = val;
1262        }
1263
1264        /* No point in loading the driver if everything is disabled */
1265        if (!sio_data->address[0] && !sio_data->address[1]) {
1266                err = -ENODEV;
1267                goto exit;
1268        }
1269
1270        /* Check which fan inputs are wired */
1271        sio_data->has_fanin = (1 << 2) | (1 << 3);      /* FANIN2, FANIN3 */
1272
1273        cfg = superio_inb(sioaddr, SIOREG_CF2);
1274        if (!(cfg & (1 << 3)))
1275                sio_data->has_fanin |= (1 << 0);        /* FANIN0 */
1276        if (!(cfg & (1 << 2)))
1277                sio_data->has_fanin |= (1 << 4);        /* FANIN4 */
1278
1279        cfg = superio_inb(sioaddr, SIOREG_CFD);
1280        if (!(cfg & (1 << 0)))
1281                sio_data->has_fanin |= (1 << 1);        /* FANIN1 */
1282
1283        cfg = superio_inb(sioaddr, SIOREG_CF4);
1284        if (!(cfg & (1 << 0)))
1285                sio_data->has_fanin |= (1 << 7);        /* FANIN7 */
1286        cfg_b = superio_inb(sioaddr, SIOREG_CFB);
1287        if (!(cfg & (1 << 1)) && (cfg_b & (1 << 3)))
1288                sio_data->has_fanin |= (1 << 5);        /* FANIN5 */
1289        cfg = superio_inb(sioaddr, SIOREG_CF3);
1290        if ((cfg & (1 << 3)) && !(cfg_b & (1 << 5)))
1291                sio_data->has_fanin |= (1 << 6);        /* FANIN6 */
1292
1293        /* Check which fan outputs are wired */
1294        sio_data->has_fanout = (1 << 0);                /* FANOUT0 */
1295        if (cfg_b & (1 << 0))
1296                sio_data->has_fanout |= (1 << 3);       /* FANOUT3 */
1297
1298        cfg = superio_inb(sioaddr, SIOREG_CFC);
1299        if (!(cfg & (1 << 4))) {
1300                if (cfg_b & (1 << 1))
1301                        sio_data->has_fanout |= (1 << 1); /* FANOUT1 */
1302                if (cfg_b & (1 << 2))
1303                        sio_data->has_fanout |= (1 << 2); /* FANOUT2 */
1304        }
1305
1306        /* FANOUT1 and FANOUT2 can each be routed to 2 different pins */
1307        cfg = superio_inb(sioaddr, SIOREG_CF5);
1308        if (cfg & (1 << 6))
1309                sio_data->has_fanout |= (1 << 1);       /* FANOUT1 */
1310        if (cfg & (1 << 5))
1311                sio_data->has_fanout |= (1 << 2);       /* FANOUT2 */
1312
1313exit:
1314        superio_exit(sioaddr);
1315        return err;
1316}
1317
1318static int __init pc87427_init(void)
1319{
1320        int err;
1321        struct pc87427_sio_data sio_data;
1322
1323        if (pc87427_find(0x2e, &sio_data)
1324         && pc87427_find(0x4e, &sio_data))
1325                return -ENODEV;
1326
1327        err = platform_driver_register(&pc87427_driver);
1328        if (err)
1329                goto exit;
1330
1331        /* Sets global pdev as a side effect */
1332        err = pc87427_device_add(&sio_data);
1333        if (err)
1334                goto exit_driver;
1335
1336        return 0;
1337
1338exit_driver:
1339        platform_driver_unregister(&pc87427_driver);
1340exit:
1341        return err;
1342}
1343
1344static void __exit pc87427_exit(void)
1345{
1346        platform_device_unregister(pdev);
1347        platform_driver_unregister(&pc87427_driver);
1348}
1349
1350MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
1351MODULE_DESCRIPTION("PC87427 hardware monitoring driver");
1352MODULE_LICENSE("GPL");
1353
1354module_init(pc87427_init);
1355module_exit(pc87427_exit);
1356
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.