drivers/hwmon/pc87427.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
superio_enter
superio_outb
superio_inb
superio_exit
pc87427_read8
pc87427_read8_bank
pc87427_write8_bank
pc87427_readall_fan
fan_from_reg
fan_to_reg
pc87427_readall_pwm
pwm_enable_from_reg
pwm_enable_to_reg
pc87427_readall_temp
temp_type_from_reg
temp_from_reg
temp_from_reg8
pc87427_update_device
fan_input_show
fan_min_show
fan_alarm_show
fan_fault_show
fan_min_store
update_pwm_enable
pwm_enable_show
pwm_enable_store
pwm_show
pwm_store
temp_input_show
temp_min_show
temp_max_show
temp_crit_show
temp_type_show
temp_min_alarm_show
temp_max_alarm_show
temp_crit_alarm_show
temp_fault_show
name_show
pc87427_request_regions
pc87427_init_device
pc87427_remove_files
pc87427_probe
pc87427_remove
pc87427_device_add
pc87427_find
pc87427_init
pc87427_exit
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  pc87427.c - hardware monitoring driver for the
   4  *              National Semiconductor PC87427 Super-I/O chip
   5  *  Copyright (C) 2006, 2008, 2010  Jean Delvare <jdelvare@suse.de>
   6  *
   7  *  Supports the following chips:
   8  *
   9  *  Chip        #vin    #fan    #pwm    #temp   devid
  10  *  PC87427     -       8       4       6       0xF2
  11  *
  12  *  This driver assumes that no more than one chip is present.
  13  *  Only fans are fully supported so far. Temperatures are in read-only
  14  *  mode, and voltages aren't supported at all.
  15  */
  16 
  17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  18 
  19 #include <linux/module.h>
  20 #include <linux/init.h>
  21 #include <linux/slab.h>
  22 #include <linux/jiffies.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/hwmon.h>
  25 #include <linux/hwmon-sysfs.h>
  26 #include <linux/err.h>
  27 #include <linux/mutex.h>
  28 #include <linux/sysfs.h>
  29 #include <linux/ioport.h>
  30 #include <linux/acpi.h>
  31 #include <linux/io.h>
  32 
  33 static unsigned short force_id;
  34 module_param(force_id, ushort, 0);
  35 MODULE_PARM_DESC(force_id, "Override the detected device ID");
  36 
  37 static struct platform_device *pdev;
  38 
  39 #define DRVNAME "pc87427"
  40 
  41 /*
  42  * The lock mutex protects both the I/O accesses (needed because the
  43  * device is using banked registers) and the register cache (needed to keep
  44  * the data in the registers and the cache in sync at any time).
  45  */
  46 struct pc87427_data {
  47         struct device *hwmon_dev;
  48         struct mutex lock;
  49         int address[2];
  50         const char *name;
  51 
  52         unsigned long last_updated;     /* in jiffies */
  53         u8 fan_enabled;                 /* bit vector */
  54         u16 fan[8];                     /* register values */
  55         u16 fan_min[8];                 /* register values */
  56         u8 fan_status[8];               /* register values */
  57 
  58         u8 pwm_enabled;                 /* bit vector */
  59         u8 pwm_auto_ok;                 /* bit vector */
  60         u8 pwm_enable[4];               /* register values */
  61         u8 pwm[4];                      /* register values */
  62 
  63         u8 temp_enabled;                /* bit vector */
  64         s16 temp[6];                    /* register values */
  65         s8 temp_min[6];                 /* register values */
  66         s8 temp_max[6];                 /* register values */
  67         s8 temp_crit[6];                /* register values */
  68         u8 temp_status[6];              /* register values */
  69         u8 temp_type[6];                /* register values */
  70 };
  71 
  72 struct pc87427_sio_data {
  73         unsigned short address[2];
  74         u8 has_fanin;
  75         u8 has_fanout;
  76 };
  77 
  78 /*
  79  * Super-I/O registers and operations
  80  */
  81 
  82 #define SIOREG_LDSEL    0x07    /* Logical device select */
  83 #define SIOREG_DEVID    0x20    /* Device ID */
  84 #define SIOREG_CF2      0x22    /* Configuration 2 */
  85 #define SIOREG_CF3      0x23    /* Configuration 3 */
  86 #define SIOREG_CF4      0x24    /* Configuration 4 */
  87 #define SIOREG_CF5      0x25    /* Configuration 5 */
  88 #define SIOREG_CFB      0x2B    /* Configuration B */
  89 #define SIOREG_CFC      0x2C    /* Configuration C */
  90 #define SIOREG_CFD      0x2D    /* Configuration D */
  91 #define SIOREG_ACT      0x30    /* Device activation */
  92 #define SIOREG_MAP      0x50    /* I/O or memory mapping */
  93 #define SIOREG_IOBASE   0x60    /* I/O base address */
  94 
  95 static const u8 logdev[2] = { 0x09, 0x14 };
  96 static const char *logdev_str[2] = { DRVNAME " FMC", DRVNAME " HMC" };
  97 #define LD_FAN          0
  98 #define LD_IN           1
  99 #define LD_TEMP         1
 100 
 101 static inline int superio_enter(int sioaddr)
 102 {
 103         if (!request_muxed_region(sioaddr, 2, DRVNAME))
 104                 return -EBUSY;
 105         return 0;
 106 }
 107 
 108 static inline void superio_outb(int sioaddr, int reg, int val)
 109 {
 110         outb(reg, sioaddr);
 111         outb(val, sioaddr + 1);
 112 }
 113 
 114 static inline int superio_inb(int sioaddr, int reg)
 115 {
 116         outb(reg, sioaddr);
 117         return inb(sioaddr + 1);
 118 }
 119 
 120 static inline void superio_exit(int sioaddr)
 121 {
 122         outb(0x02, sioaddr);
 123         outb(0x02, sioaddr + 1);
 124         release_region(sioaddr, 2);
 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 */
 144 static 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 */
 150 static 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 */
 158 static 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  */
 184 static 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  */
 200 static 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. */
 209 static 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  */
 239 static 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 
 248 static 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 
 263 static 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  */
 303 static 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 
 318 static 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  */
 335 static inline long temp_from_reg(s16 reg)
 336 {
 337         return reg * 1000 / 256;
 338 }
 339 
 340 static inline long temp_from_reg8(s8 reg)
 341 {
 342         return reg * 1000;
 343 }
 344 
 345 /*
 346  * Data interface
 347  */
 348 
 349 static 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 
 382 done:
 383         mutex_unlock(&data->lock);
 384         return data;
 385 }
 386 
 387 static ssize_t fan_input_show(struct device *dev,
 388                               struct device_attribute *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 
 396 static ssize_t fan_min_show(struct device *dev,
 397                             struct device_attribute *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 
 405 static ssize_t fan_alarm_show(struct device *dev,
 406                               struct device_attribute *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 
 415 static ssize_t fan_fault_show(struct device *dev,
 416                               struct device_attribute *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 
 425 static ssize_t fan_min_store(struct device *dev,
 426                              struct device_attribute *devattr,
 427                              const char *buf, size_t count)
 428 {
 429         struct pc87427_data *data = dev_get_drvdata(dev);
 430         int nr = to_sensor_dev_attr(devattr)->index;
 431         unsigned long val;
 432         int iobase = data->address[LD_FAN];
 433 
 434         if (kstrtoul(buf, 10, &val) < 0)
 435                 return -EINVAL;
 436 
 437         mutex_lock(&data->lock);
 438         outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
 439         /*
 440          * The low speed limit registers are read-only while monitoring
 441          * is enabled, so we have to disable monitoring, then change the
 442          * limit, and finally enable monitoring again.
 443          */
 444         outb(0, iobase + PC87427_REG_FAN_STATUS);
 445         data->fan_min[nr] = fan_to_reg(val);
 446         outw(data->fan_min[nr], iobase + PC87427_REG_FAN_MIN);
 447         outb(FAN_STATUS_MONEN, iobase + PC87427_REG_FAN_STATUS);
 448         mutex_unlock(&data->lock);
 449 
 450         return count;
 451 }
 452 
 453 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0);
 454 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1);
 455 static SENSOR_DEVICE_ATTR_RO(fan3_input, fan_input, 2);
 456 static SENSOR_DEVICE_ATTR_RO(fan4_input, fan_input, 3);
 457 static SENSOR_DEVICE_ATTR_RO(fan5_input, fan_input, 4);
 458 static SENSOR_DEVICE_ATTR_RO(fan6_input, fan_input, 5);
 459 static SENSOR_DEVICE_ATTR_RO(fan7_input, fan_input, 6);
 460 static SENSOR_DEVICE_ATTR_RO(fan8_input, fan_input, 7);
 461 
 462 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
 463 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
 464 static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2);
 465 static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3);
 466 static SENSOR_DEVICE_ATTR_RW(fan5_min, fan_min, 4);
 467 static SENSOR_DEVICE_ATTR_RW(fan6_min, fan_min, 5);
 468 static SENSOR_DEVICE_ATTR_RW(fan7_min, fan_min, 6);
 469 static SENSOR_DEVICE_ATTR_RW(fan8_min, fan_min, 7);
 470 
 471 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, fan_alarm, 0);
 472 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, fan_alarm, 1);
 473 static SENSOR_DEVICE_ATTR_RO(fan3_alarm, fan_alarm, 2);
 474 static SENSOR_DEVICE_ATTR_RO(fan4_alarm, fan_alarm, 3);
 475 static SENSOR_DEVICE_ATTR_RO(fan5_alarm, fan_alarm, 4);
 476 static SENSOR_DEVICE_ATTR_RO(fan6_alarm, fan_alarm, 5);
 477 static SENSOR_DEVICE_ATTR_RO(fan7_alarm, fan_alarm, 6);
 478 static SENSOR_DEVICE_ATTR_RO(fan8_alarm, fan_alarm, 7);
 479 
 480 static SENSOR_DEVICE_ATTR_RO(fan1_fault, fan_fault, 0);
 481 static SENSOR_DEVICE_ATTR_RO(fan2_fault, fan_fault, 1);
 482 static SENSOR_DEVICE_ATTR_RO(fan3_fault, fan_fault, 2);
 483 static SENSOR_DEVICE_ATTR_RO(fan4_fault, fan_fault, 3);
 484 static SENSOR_DEVICE_ATTR_RO(fan5_fault, fan_fault, 4);
 485 static SENSOR_DEVICE_ATTR_RO(fan6_fault, fan_fault, 5);
 486 static SENSOR_DEVICE_ATTR_RO(fan7_fault, fan_fault, 6);
 487 static SENSOR_DEVICE_ATTR_RO(fan8_fault, fan_fault, 7);
 488 
 489 static struct attribute *pc87427_attributes_fan[8][5] = {
 490         {
 491                 &sensor_dev_attr_fan1_input.dev_attr.attr,
 492                 &sensor_dev_attr_fan1_min.dev_attr.attr,
 493                 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 494                 &sensor_dev_attr_fan1_fault.dev_attr.attr,
 495                 NULL
 496         }, {
 497                 &sensor_dev_attr_fan2_input.dev_attr.attr,
 498                 &sensor_dev_attr_fan2_min.dev_attr.attr,
 499                 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 500                 &sensor_dev_attr_fan2_fault.dev_attr.attr,
 501                 NULL
 502         }, {
 503                 &sensor_dev_attr_fan3_input.dev_attr.attr,
 504                 &sensor_dev_attr_fan3_min.dev_attr.attr,
 505                 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
 506                 &sensor_dev_attr_fan3_fault.dev_attr.attr,
 507                 NULL
 508         }, {
 509                 &sensor_dev_attr_fan4_input.dev_attr.attr,
 510                 &sensor_dev_attr_fan4_min.dev_attr.attr,
 511                 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
 512                 &sensor_dev_attr_fan4_fault.dev_attr.attr,
 513                 NULL
 514         }, {
 515                 &sensor_dev_attr_fan5_input.dev_attr.attr,
 516                 &sensor_dev_attr_fan5_min.dev_attr.attr,
 517                 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
 518                 &sensor_dev_attr_fan5_fault.dev_attr.attr,
 519                 NULL
 520         }, {
 521                 &sensor_dev_attr_fan6_input.dev_attr.attr,
 522                 &sensor_dev_attr_fan6_min.dev_attr.attr,
 523                 &sensor_dev_attr_fan6_alarm.dev_attr.attr,
 524                 &sensor_dev_attr_fan6_fault.dev_attr.attr,
 525                 NULL
 526         }, {
 527                 &sensor_dev_attr_fan7_input.dev_attr.attr,
 528                 &sensor_dev_attr_fan7_min.dev_attr.attr,
 529                 &sensor_dev_attr_fan7_alarm.dev_attr.attr,
 530                 &sensor_dev_attr_fan7_fault.dev_attr.attr,
 531                 NULL
 532         }, {
 533                 &sensor_dev_attr_fan8_input.dev_attr.attr,
 534                 &sensor_dev_attr_fan8_min.dev_attr.attr,
 535                 &sensor_dev_attr_fan8_alarm.dev_attr.attr,
 536                 &sensor_dev_attr_fan8_fault.dev_attr.attr,
 537                 NULL
 538         }
 539 };
 540 
 541 static const struct attribute_group pc87427_group_fan[8] = {
 542         { .attrs = pc87427_attributes_fan[0] },
 543         { .attrs = pc87427_attributes_fan[1] },
 544         { .attrs = pc87427_attributes_fan[2] },
 545         { .attrs = pc87427_attributes_fan[3] },
 546         { .attrs = pc87427_attributes_fan[4] },
 547         { .attrs = pc87427_attributes_fan[5] },
 548         { .attrs = pc87427_attributes_fan[6] },
 549         { .attrs = pc87427_attributes_fan[7] },
 550 };
 551 
 552 /*
 553  * Must be called with data->lock held and pc87427_readall_pwm() freshly
 554  * called
 555  */
 556 static void update_pwm_enable(struct pc87427_data *data, int nr, u8 mode)
 557 {
 558         int iobase = data->address[LD_FAN];
 559         data->pwm_enable[nr] &= ~PWM_ENABLE_MODE_MASK;
 560         data->pwm_enable[nr] |= mode;
 561         outb(data->pwm_enable[nr], iobase + PC87427_REG_PWM_ENABLE);
 562 }
 563 
 564 static ssize_t pwm_enable_show(struct device *dev,
 565                                struct device_attribute *devattr, char *buf)
 566 {
 567         struct pc87427_data *data = pc87427_update_device(dev);
 568         int nr = to_sensor_dev_attr(devattr)->index;
 569         int pwm_enable;
 570 
 571         pwm_enable = pwm_enable_from_reg(data->pwm_enable[nr]);
 572         if (pwm_enable < 0)
 573                 return pwm_enable;
 574         return sprintf(buf, "%d\n", pwm_enable);
 575 }
 576 
 577 static ssize_t pwm_enable_store(struct device *dev,
 578                                 struct device_attribute *devattr,
 579                                 const char *buf, size_t count)
 580 {
 581         struct pc87427_data *data = dev_get_drvdata(dev);
 582         int nr = to_sensor_dev_attr(devattr)->index;
 583         unsigned long val;
 584 
 585         if (kstrtoul(buf, 10, &val) < 0 || val > 2)
 586                 return -EINVAL;
 587         /* Can't go to automatic mode if it isn't configured */
 588         if (val == 2 && !(data->pwm_auto_ok & (1 << nr)))
 589                 return -EINVAL;
 590 
 591         mutex_lock(&data->lock);
 592         pc87427_readall_pwm(data, nr);
 593         update_pwm_enable(data, nr, pwm_enable_to_reg(val, data->pwm[nr]));
 594         mutex_unlock(&data->lock);
 595 
 596         return count;
 597 }
 598 
 599 static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr,
 600                         char *buf)
 601 {
 602         struct pc87427_data *data = pc87427_update_device(dev);
 603         int nr = to_sensor_dev_attr(devattr)->index;
 604 
 605         return sprintf(buf, "%d\n", (int)data->pwm[nr]);
 606 }
 607 
 608 static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,
 609                          const char *buf, size_t count)
 610 {
 611         struct pc87427_data *data = dev_get_drvdata(dev);
 612         int nr = to_sensor_dev_attr(devattr)->index;
 613         unsigned long val;
 614         int iobase = data->address[LD_FAN];
 615         u8 mode;
 616 
 617         if (kstrtoul(buf, 10, &val) < 0 || val > 0xff)
 618                 return -EINVAL;
 619 
 620         mutex_lock(&data->lock);
 621         pc87427_readall_pwm(data, nr);
 622         mode = data->pwm_enable[nr] & PWM_ENABLE_MODE_MASK;
 623         if (mode != PWM_MODE_MANUAL && mode != PWM_MODE_OFF) {
 624                 dev_notice(dev,
 625                            "Can't set PWM%d duty cycle while not in manual mode\n",
 626                            nr + 1);
 627                 mutex_unlock(&data->lock);
 628                 return -EPERM;
 629         }
 630 
 631         /* We may have to change the mode */
 632         if (mode == PWM_MODE_MANUAL && val == 0) {
 633                 /* Transition from Manual to Off */
 634                 update_pwm_enable(data, nr, PWM_MODE_OFF);
 635                 mode = PWM_MODE_OFF;
 636                 dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
 637                         "manual", "off");
 638         } else if (mode == PWM_MODE_OFF && val != 0) {
 639                 /* Transition from Off to Manual */
 640                 update_pwm_enable(data, nr, PWM_MODE_MANUAL);
 641                 mode = PWM_MODE_MANUAL;
 642                 dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
 643                         "off", "manual");
 644         }
 645 
 646         data->pwm[nr] = val;
 647         if (mode == PWM_MODE_MANUAL)
 648                 outb(val, iobase + PC87427_REG_PWM_DUTY);
 649         mutex_unlock(&data->lock);
 650 
 651         return count;
 652 }
 653 
 654 static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_enable, 0);
 655 static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_enable, 1);
 656 static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_enable, 2);
 657 static SENSOR_DEVICE_ATTR_RW(pwm4_enable, pwm_enable, 3);
 658 
 659 static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
 660 static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
 661 static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);
 662 static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3);
 663 
 664 static struct attribute *pc87427_attributes_pwm[4][3] = {
 665         {
 666                 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 667                 &sensor_dev_attr_pwm1.dev_attr.attr,
 668                 NULL
 669         }, {
 670                 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
 671                 &sensor_dev_attr_pwm2.dev_attr.attr,
 672                 NULL
 673         }, {
 674                 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
 675                 &sensor_dev_attr_pwm3.dev_attr.attr,
 676                 NULL
 677         }, {
 678                 &sensor_dev_attr_pwm4_enable.dev_attr.attr,
 679                 &sensor_dev_attr_pwm4.dev_attr.attr,
 680                 NULL
 681         }
 682 };
 683 
 684 static const struct attribute_group pc87427_group_pwm[4] = {
 685         { .attrs = pc87427_attributes_pwm[0] },
 686         { .attrs = pc87427_attributes_pwm[1] },
 687         { .attrs = pc87427_attributes_pwm[2] },
 688         { .attrs = pc87427_attributes_pwm[3] },
 689 };
 690 
 691 static ssize_t temp_input_show(struct device *dev,
 692                                struct device_attribute *devattr, char *buf)
 693 {
 694         struct pc87427_data *data = pc87427_update_device(dev);
 695         int nr = to_sensor_dev_attr(devattr)->index;
 696 
 697         return sprintf(buf, "%ld\n", temp_from_reg(data->temp[nr]));
 698 }
 699 
 700 static ssize_t temp_min_show(struct device *dev,
 701                              struct device_attribute *devattr, char *buf)
 702 {
 703         struct pc87427_data *data = pc87427_update_device(dev);
 704         int nr = to_sensor_dev_attr(devattr)->index;
 705 
 706         return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_min[nr]));
 707 }
 708 
 709 static ssize_t temp_max_show(struct device *dev,
 710                              struct device_attribute *devattr, char *buf)
 711 {
 712         struct pc87427_data *data = pc87427_update_device(dev);
 713         int nr = to_sensor_dev_attr(devattr)->index;
 714 
 715         return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_max[nr]));
 716 }
 717 
 718 static ssize_t temp_crit_show(struct device *dev,
 719                               struct device_attribute *devattr, char *buf)
 720 {
 721         struct pc87427_data *data = pc87427_update_device(dev);
 722         int nr = to_sensor_dev_attr(devattr)->index;
 723 
 724         return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_crit[nr]));
 725 }
 726 
 727 static ssize_t temp_type_show(struct device *dev,
 728                               struct device_attribute *devattr, char *buf)
 729 {
 730         struct pc87427_data *data = pc87427_update_device(dev);
 731         int nr = to_sensor_dev_attr(devattr)->index;
 732 
 733         return sprintf(buf, "%u\n", temp_type_from_reg(data->temp_type[nr]));
 734 }
 735 
 736 static ssize_t temp_min_alarm_show(struct device *dev,
 737                                    struct device_attribute *devattr,
 738                                    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, "%d\n", !!(data->temp_status[nr]
 744                                        & TEMP_STATUS_LOWFLG));
 745 }
 746 
 747 static ssize_t temp_max_alarm_show(struct device *dev,
 748                                    struct device_attribute *devattr,
 749                                    char *buf)
 750 {
 751         struct pc87427_data *data = pc87427_update_device(dev);
 752         int nr = to_sensor_dev_attr(devattr)->index;
 753 
 754         return sprintf(buf, "%d\n", !!(data->temp_status[nr]
 755                                        & TEMP_STATUS_HIGHFLG));
 756 }
 757 
 758 static ssize_t temp_crit_alarm_show(struct device *dev,
 759                                     struct device_attribute *devattr,
 760                                     char *buf)
 761 {
 762         struct pc87427_data *data = pc87427_update_device(dev);
 763         int nr = to_sensor_dev_attr(devattr)->index;
 764 
 765         return sprintf(buf, "%d\n", !!(data->temp_status[nr]
 766                                        & TEMP_STATUS_CRITFLG));
 767 }
 768 
 769 static ssize_t temp_fault_show(struct device *dev,
 770                                struct device_attribute *devattr, char *buf)
 771 {
 772         struct pc87427_data *data = pc87427_update_device(dev);
 773         int nr = to_sensor_dev_attr(devattr)->index;
 774 
 775         return sprintf(buf, "%d\n", !!(data->temp_status[nr]
 776                                        & TEMP_STATUS_SENSERR));
 777 }
 778 
 779 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0);
 780 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1);
 781 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_input, 2);
 782 static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_input, 3);
 783 static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_input, 4);
 784 static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_input, 5);
 785 
 786 static SENSOR_DEVICE_ATTR_RO(temp1_min, temp_min, 0);
 787 static SENSOR_DEVICE_ATTR_RO(temp2_min, temp_min, 1);
 788 static SENSOR_DEVICE_ATTR_RO(temp3_min, temp_min, 2);
 789 static SENSOR_DEVICE_ATTR_RO(temp4_min, temp_min, 3);
 790 static SENSOR_DEVICE_ATTR_RO(temp5_min, temp_min, 4);
 791 static SENSOR_DEVICE_ATTR_RO(temp6_min, temp_min, 5);
 792 
 793 static SENSOR_DEVICE_ATTR_RO(temp1_max, temp_max, 0);
 794 static SENSOR_DEVICE_ATTR_RO(temp2_max, temp_max, 1);
 795 static SENSOR_DEVICE_ATTR_RO(temp3_max, temp_max, 2);
 796 static SENSOR_DEVICE_ATTR_RO(temp4_max, temp_max, 3);
 797 static SENSOR_DEVICE_ATTR_RO(temp5_max, temp_max, 4);
 798 static SENSOR_DEVICE_ATTR_RO(temp6_max, temp_max, 5);
 799 
 800 static SENSOR_DEVICE_ATTR_RO(temp1_crit, temp_crit, 0);
 801 static SENSOR_DEVICE_ATTR_RO(temp2_crit, temp_crit, 1);
 802 static SENSOR_DEVICE_ATTR_RO(temp3_crit, temp_crit, 2);
 803 static SENSOR_DEVICE_ATTR_RO(temp4_crit, temp_crit, 3);
 804 static SENSOR_DEVICE_ATTR_RO(temp5_crit, temp_crit, 4);
 805 static SENSOR_DEVICE_ATTR_RO(temp6_crit, temp_crit, 5);
 806 
 807 static SENSOR_DEVICE_ATTR_RO(temp1_type, temp_type, 0);
 808 static SENSOR_DEVICE_ATTR_RO(temp2_type, temp_type, 1);
 809 static SENSOR_DEVICE_ATTR_RO(temp3_type, temp_type, 2);
 810 static SENSOR_DEVICE_ATTR_RO(temp4_type, temp_type, 3);
 811 static SENSOR_DEVICE_ATTR_RO(temp5_type, temp_type, 4);
 812 static SENSOR_DEVICE_ATTR_RO(temp6_type, temp_type, 5);
 813 
 814 static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, temp_min_alarm, 0);
 815 static SENSOR_DEVICE_ATTR_RO(temp2_min_alarm, temp_min_alarm, 1);
 816 static SENSOR_DEVICE_ATTR_RO(temp3_min_alarm, temp_min_alarm, 2);
 817 static SENSOR_DEVICE_ATTR_RO(temp4_min_alarm, temp_min_alarm, 3);
 818 static SENSOR_DEVICE_ATTR_RO(temp5_min_alarm, temp_min_alarm, 4);
 819 static SENSOR_DEVICE_ATTR_RO(temp6_min_alarm, temp_min_alarm, 5);
 820 
 821 static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, temp_max_alarm, 0);
 822 static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, temp_max_alarm, 1);
 823 static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, temp_max_alarm, 2);
 824 static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, temp_max_alarm, 3);
 825 static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, temp_max_alarm, 4);
 826 static SENSOR_DEVICE_ATTR_RO(temp6_max_alarm, temp_max_alarm, 5);
 827 
 828 static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, temp_crit_alarm, 0);
 829 static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, temp_crit_alarm, 1);
 830 static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, temp_crit_alarm, 2);
 831 static SENSOR_DEVICE_ATTR_RO(temp4_crit_alarm, temp_crit_alarm, 3);
 832 static SENSOR_DEVICE_ATTR_RO(temp5_crit_alarm, temp_crit_alarm, 4);
 833 static SENSOR_DEVICE_ATTR_RO(temp6_crit_alarm, temp_crit_alarm, 5);
 834 
 835 static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0);
 836 static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1);
 837 static SENSOR_DEVICE_ATTR_RO(temp3_fault, temp_fault, 2);
 838 static SENSOR_DEVICE_ATTR_RO(temp4_fault, temp_fault, 3);
 839 static SENSOR_DEVICE_ATTR_RO(temp5_fault, temp_fault, 4);
 840 static SENSOR_DEVICE_ATTR_RO(temp6_fault, temp_fault, 5);
 841 
 842 static struct attribute *pc87427_attributes_temp[6][10] = {
 843         {
 844                 &sensor_dev_attr_temp1_input.dev_attr.attr,
 845                 &sensor_dev_attr_temp1_min.dev_attr.attr,
 846                 &sensor_dev_attr_temp1_max.dev_attr.attr,
 847                 &sensor_dev_attr_temp1_crit.dev_attr.attr,
 848                 &sensor_dev_attr_temp1_type.dev_attr.attr,
 849                 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
 850                 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
 851                 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
 852                 &sensor_dev_attr_temp1_fault.dev_attr.attr,
 853                 NULL
 854         }, {
 855                 &sensor_dev_attr_temp2_input.dev_attr.attr,
 856                 &sensor_dev_attr_temp2_min.dev_attr.attr,
 857                 &sensor_dev_attr_temp2_max.dev_attr.attr,
 858                 &sensor_dev_attr_temp2_crit.dev_attr.attr,
 859                 &sensor_dev_attr_temp2_type.dev_attr.attr,
 860                 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
 861                 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
 862                 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
 863                 &sensor_dev_attr_temp2_fault.dev_attr.attr,
 864                 NULL
 865         }, {
 866                 &sensor_dev_attr_temp3_input.dev_attr.attr,
 867                 &sensor_dev_attr_temp3_min.dev_attr.attr,
 868                 &sensor_dev_attr_temp3_max.dev_attr.attr,
 869                 &sensor_dev_attr_temp3_crit.dev_attr.attr,
 870                 &sensor_dev_attr_temp3_type.dev_attr.attr,
 871                 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
 872                 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
 873                 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
 874                 &sensor_dev_attr_temp3_fault.dev_attr.attr,
 875                 NULL
 876         }, {
 877                 &sensor_dev_attr_temp4_input.dev_attr.attr,
 878                 &sensor_dev_attr_temp4_min.dev_attr.attr,
 879                 &sensor_dev_attr_temp4_max.dev_attr.attr,
 880                 &sensor_dev_attr_temp4_crit.dev_attr.attr,
 881                 &sensor_dev_attr_temp4_type.dev_attr.attr,
 882                 &sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
 883                 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
 884                 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
 885                 &sensor_dev_attr_temp4_fault.dev_attr.attr,
 886                 NULL
 887         }, {
 888                 &sensor_dev_attr_temp5_input.dev_attr.attr,
 889                 &sensor_dev_attr_temp5_min.dev_attr.attr,
 890                 &sensor_dev_attr_temp5_max.dev_attr.attr,
 891                 &sensor_dev_attr_temp5_crit.dev_attr.attr,
 892                 &sensor_dev_attr_temp5_type.dev_attr.attr,
 893                 &sensor_dev_attr_temp5_min_alarm.dev_attr.attr,
 894                 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
 895                 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
 896                 &sensor_dev_attr_temp5_fault.dev_attr.attr,
 897                 NULL
 898         }, {
 899                 &sensor_dev_attr_temp6_input.dev_attr.attr,
 900                 &sensor_dev_attr_temp6_min.dev_attr.attr,
 901                 &sensor_dev_attr_temp6_max.dev_attr.attr,
 902                 &sensor_dev_attr_temp6_crit.dev_attr.attr,
 903                 &sensor_dev_attr_temp6_type.dev_attr.attr,
 904                 &sensor_dev_attr_temp6_min_alarm.dev_attr.attr,
 905                 &sensor_dev_attr_temp6_max_alarm.dev_attr.attr,
 906                 &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr,
 907                 &sensor_dev_attr_temp6_fault.dev_attr.attr,
 908                 NULL
 909         }
 910 };
 911 
 912 static const struct attribute_group pc87427_group_temp[6] = {
 913         { .attrs = pc87427_attributes_temp[0] },
 914         { .attrs = pc87427_attributes_temp[1] },
 915         { .attrs = pc87427_attributes_temp[2] },
 916         { .attrs = pc87427_attributes_temp[3] },
 917         { .attrs = pc87427_attributes_temp[4] },
 918         { .attrs = pc87427_attributes_temp[5] },
 919 };
 920 
 921 static ssize_t name_show(struct device *dev, struct device_attribute
 922                          *devattr, char *buf)
 923 {
 924         struct pc87427_data *data = dev_get_drvdata(dev);
 925 
 926         return sprintf(buf, "%s\n", data->name);
 927 }
 928 static DEVICE_ATTR_RO(name);
 929 
 930 
 931 /*
 932  * Device detection, attach and detach
 933  */
 934 
 935 static int pc87427_request_regions(struct platform_device *pdev,
 936                                              int count)
 937 {
 938         struct resource *res;
 939         int i;
 940 
 941         for (i = 0; i < count; i++) {
 942                 res = platform_get_resource(pdev, IORESOURCE_IO, i);
 943                 if (!res) {
 944                         dev_err(&pdev->dev, "Missing resource #%d\n", i);
 945                         return -ENOENT;
 946                 }
 947                 if (!devm_request_region(&pdev->dev, res->start,
 948                                          resource_size(res), DRVNAME)) {
 949                         dev_err(&pdev->dev,
 950                                 "Failed to request region 0x%lx-0x%lx\n",
 951                                 (unsigned long)res->start,
 952                                 (unsigned long)res->end);
 953                         return -EBUSY;
 954                 }
 955         }
 956         return 0;
 957 }
 958 
 959 static void pc87427_init_device(struct device *dev)
 960 {
 961         struct pc87427_sio_data *sio_data = dev_get_platdata(dev);
 962         struct pc87427_data *data = dev_get_drvdata(dev);
 963         int i;
 964         u8 reg;
 965 
 966         /* The FMC module should be ready */
 967         reg = pc87427_read8(data, LD_FAN, PC87427_REG_BANK);
 968         if (!(reg & 0x80))
 969                 dev_warn(dev, "%s module not ready!\n", "FMC");
 970 
 971         /* Check which fans are enabled */
 972         for (i = 0; i < 8; i++) {
 973                 if (!(sio_data->has_fanin & (1 << i)))  /* Not wired */
 974                         continue;
 975                 reg = pc87427_read8_bank(data, LD_FAN, BANK_FM(i),
 976                                          PC87427_REG_FAN_STATUS);
 977                 if (reg & FAN_STATUS_MONEN)
 978                         data->fan_enabled |= (1 << i);
 979         }
 980 
 981         if (!data->fan_enabled) {
 982                 dev_dbg(dev, "Enabling monitoring of all fans\n");
 983                 for (i = 0; i < 8; i++) {
 984                         if (!(sio_data->has_fanin & (1 << i)))  /* Not wired */
 985                                 continue;
 986                         pc87427_write8_bank(data, LD_FAN, BANK_FM(i),
 987                                             PC87427_REG_FAN_STATUS,
 988                                             FAN_STATUS_MONEN);
 989                 }
 990                 data->fan_enabled = sio_data->has_fanin;
 991         }
 992 
 993         /* Check which PWM outputs are enabled */
 994         for (i = 0; i < 4; i++) {
 995                 if (!(sio_data->has_fanout & (1 << i))) /* Not wired */
 996                         continue;
 997                 reg = pc87427_read8_bank(data, LD_FAN, BANK_FC(i),
 998                                          PC87427_REG_PWM_ENABLE);
 999                 if (reg & PWM_ENABLE_CTLEN)
1000                         data->pwm_enabled |= (1 << i);
1001 
1002                 /*
1003                  * We don't expose an interface to reconfigure the automatic
1004                  * fan control mode, so only allow to return to this mode if
1005                  * it was originally set.
1006                  */
1007                 if ((reg & PWM_ENABLE_MODE_MASK) == PWM_MODE_AUTO) {
1008                         dev_dbg(dev, "PWM%d is in automatic control mode\n",
1009                                 i + 1);
1010                         data->pwm_auto_ok |= (1 << i);
1011                 }
1012         }
1013 
1014         /* The HMC module should be ready */
1015         reg = pc87427_read8(data, LD_TEMP, PC87427_REG_BANK);
1016         if (!(reg & 0x80))
1017                 dev_warn(dev, "%s module not ready!\n", "HMC");
1018 
1019         /* Check which temperature channels are enabled */
1020         for (i = 0; i < 6; i++) {
1021                 reg = pc87427_read8_bank(data, LD_TEMP, BANK_TM(i),
1022                                          PC87427_REG_TEMP_STATUS);
1023                 if (reg & TEMP_STATUS_CHANEN)
1024                         data->temp_enabled |= (1 << i);
1025         }
1026 }
1027 
1028 static void pc87427_remove_files(struct device *dev)
1029 {
1030         struct pc87427_data *data = dev_get_drvdata(dev);
1031         int i;
1032 
1033         device_remove_file(dev, &dev_attr_name);
1034         for (i = 0; i < 8; i++) {
1035                 if (!(data->fan_enabled & (1 << i)))
1036                         continue;
1037                 sysfs_remove_group(&dev->kobj, &pc87427_group_fan[i]);
1038         }
1039         for (i = 0; i < 4; i++) {
1040                 if (!(data->pwm_enabled & (1 << i)))
1041                         continue;
1042                 sysfs_remove_group(&dev->kobj, &pc87427_group_pwm[i]);
1043         }
1044         for (i = 0; i < 6; i++) {
1045                 if (!(data->temp_enabled & (1 << i)))
1046                         continue;
1047                 sysfs_remove_group(&dev->kobj, &pc87427_group_temp[i]);
1048         }
1049 }
1050 
1051 static int pc87427_probe(struct platform_device *pdev)
1052 {
1053         struct pc87427_sio_data *sio_data = dev_get_platdata(&pdev->dev);
1054         struct pc87427_data *data;
1055         int i, err, res_count;
1056 
1057         data = devm_kzalloc(&pdev->dev, sizeof(struct pc87427_data),
1058                             GFP_KERNEL);
1059         if (!data)
1060                 return -ENOMEM;
1061 
1062         data->address[0] = sio_data->address[0];
1063         data->address[1] = sio_data->address[1];
1064         res_count = (data->address[0] != 0) + (data->address[1] != 0);
1065 
1066         err = pc87427_request_regions(pdev, res_count);
1067         if (err)
1068                 return err;
1069 
1070         mutex_init(&data->lock);
1071         data->name = "pc87427";
1072         platform_set_drvdata(pdev, data);
1073         pc87427_init_device(&pdev->dev);
1074 
1075         /* Register sysfs hooks */
1076         err = device_create_file(&pdev->dev, &dev_attr_name);
1077         if (err)
1078                 return err;
1079         for (i = 0; i < 8; i++) {
1080                 if (!(data->fan_enabled & (1 << i)))
1081                         continue;
1082                 err = sysfs_create_group(&pdev->dev.kobj,
1083                                          &pc87427_group_fan[i]);
1084                 if (err)
1085                         goto exit_remove_files;
1086         }
1087         for (i = 0; i < 4; i++) {
1088                 if (!(data->pwm_enabled & (1 << i)))
1089                         continue;
1090                 err = sysfs_create_group(&pdev->dev.kobj,
1091                                          &pc87427_group_pwm[i]);
1092                 if (err)
1093                         goto exit_remove_files;
1094         }
1095         for (i = 0; i < 6; i++) {
1096                 if (!(data->temp_enabled & (1 << i)))
1097                         continue;
1098                 err = sysfs_create_group(&pdev->dev.kobj,
1099                                          &pc87427_group_temp[i]);
1100                 if (err)
1101                         goto exit_remove_files;
1102         }
1103 
1104         data->hwmon_dev = hwmon_device_register(&pdev->dev);
1105         if (IS_ERR(data->hwmon_dev)) {
1106                 err = PTR_ERR(data->hwmon_dev);
1107                 dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
1108                 goto exit_remove_files;
1109         }
1110 
1111         return 0;
1112 
1113 exit_remove_files:
1114         pc87427_remove_files(&pdev->dev);
1115         return err;
1116 }
1117 
1118 static int pc87427_remove(struct platform_device *pdev)
1119 {
1120         struct pc87427_data *data = platform_get_drvdata(pdev);
1121 
1122         hwmon_device_unregister(data->hwmon_dev);
1123         pc87427_remove_files(&pdev->dev);
1124 
1125         return 0;
1126 }
1127 
1128 
1129 static struct platform_driver pc87427_driver = {
1130         .driver = {
1131                 .name   = DRVNAME,
1132         },
1133         .probe          = pc87427_probe,
1134         .remove         = pc87427_remove,
1135 };
1136 
1137 static int __init pc87427_device_add(const struct pc87427_sio_data *sio_data)
1138 {
1139         struct resource res[2] = {
1140                 { .flags        = IORESOURCE_IO },
1141                 { .flags        = IORESOURCE_IO },
1142         };
1143         int err, i, res_count;
1144 
1145         res_count = 0;
1146         for (i = 0; i < 2; i++) {
1147                 if (!sio_data->address[i])
1148                         continue;
1149                 res[res_count].start = sio_data->address[i];
1150                 res[res_count].end = sio_data->address[i] + REGION_LENGTH - 1;
1151                 res[res_count].name = logdev_str[i];
1152 
1153                 err = acpi_check_resource_conflict(&res[res_count]);
1154                 if (err)
1155                         goto exit;
1156 
1157                 res_count++;
1158         }
1159 
1160         pdev = platform_device_alloc(DRVNAME, res[0].start);
1161         if (!pdev) {
1162                 err = -ENOMEM;
1163                 pr_err("Device allocation failed\n");
1164                 goto exit;
1165         }
1166 
1167         err = platform_device_add_resources(pdev, res, res_count);
1168         if (err) {
1169                 pr_err("Device resource addition failed (%d)\n", err);
1170                 goto exit_device_put;
1171         }
1172 
1173         err = platform_device_add_data(pdev, sio_data,
1174                                        sizeof(struct pc87427_sio_data));
1175         if (err) {
1176                 pr_err("Platform data allocation failed\n");
1177                 goto exit_device_put;
1178         }
1179 
1180         err = platform_device_add(pdev);
1181         if (err) {
1182                 pr_err("Device addition failed (%d)\n", err);
1183                 goto exit_device_put;
1184         }
1185 
1186         return 0;
1187 
1188 exit_device_put:
1189         platform_device_put(pdev);
1190 exit:
1191         return err;
1192 }
1193 
1194 static int __init pc87427_find(int sioaddr, struct pc87427_sio_data *sio_data)
1195 {
1196         u16 val;
1197         u8 cfg, cfg_b;
1198         int i, err;
1199 
1200         err = superio_enter(sioaddr);
1201         if (err)
1202                 return err;
1203 
1204         /* Identify device */
1205         val = force_id ? force_id : superio_inb(sioaddr, SIOREG_DEVID);
1206         if (val != 0xf2) {      /* PC87427 */
1207                 err = -ENODEV;
1208                 goto exit;
1209         }
1210 
1211         for (i = 0; i < 2; i++) {
1212                 sio_data->address[i] = 0;
1213                 /* Select logical device */
1214                 superio_outb(sioaddr, SIOREG_LDSEL, logdev[i]);
1215 
1216                 val = superio_inb(sioaddr, SIOREG_ACT);
1217                 if (!(val & 0x01)) {
1218                         pr_info("Logical device 0x%02x not activated\n",
1219                                 logdev[i]);
1220                         continue;
1221                 }
1222 
1223                 val = superio_inb(sioaddr, SIOREG_MAP);
1224                 if (val & 0x01) {
1225                         pr_warn("Logical device 0x%02x is memory-mapped, can't use\n",
1226                                 logdev[i]);
1227                         continue;
1228                 }
1229 
1230                 val = (superio_inb(sioaddr, SIOREG_IOBASE) << 8)
1231                     | superio_inb(sioaddr, SIOREG_IOBASE + 1);
1232                 if (!val) {
1233                         pr_info("I/O base address not set for logical device 0x%02x\n",
1234                                 logdev[i]);
1235                         continue;
1236                 }
1237                 sio_data->address[i] = val;
1238         }
1239 
1240         /* No point in loading the driver if everything is disabled */
1241         if (!sio_data->address[0] && !sio_data->address[1]) {
1242                 err = -ENODEV;
1243                 goto exit;
1244         }
1245 
1246         /* Check which fan inputs are wired */
1247         sio_data->has_fanin = (1 << 2) | (1 << 3);      /* FANIN2, FANIN3 */
1248 
1249         cfg = superio_inb(sioaddr, SIOREG_CF2);
1250         if (!(cfg & (1 << 3)))
1251                 sio_data->has_fanin |= (1 << 0);        /* FANIN0 */
1252         if (!(cfg & (1 << 2)))
1253                 sio_data->has_fanin |= (1 << 4);        /* FANIN4 */
1254 
1255         cfg = superio_inb(sioaddr, SIOREG_CFD);
1256         if (!(cfg & (1 << 0)))
1257                 sio_data->has_fanin |= (1 << 1);        /* FANIN1 */
1258 
1259         cfg = superio_inb(sioaddr, SIOREG_CF4);
1260         if (!(cfg & (1 << 0)))
1261                 sio_data->has_fanin |= (1 << 7);        /* FANIN7 */
1262         cfg_b = superio_inb(sioaddr, SIOREG_CFB);
1263         if (!(cfg & (1 << 1)) && (cfg_b & (1 << 3)))
1264                 sio_data->has_fanin |= (1 << 5);        /* FANIN5 */
1265         cfg = superio_inb(sioaddr, SIOREG_CF3);
1266         if ((cfg & (1 << 3)) && !(cfg_b & (1 << 5)))
1267                 sio_data->has_fanin |= (1 << 6);        /* FANIN6 */
1268 
1269         /* Check which fan outputs are wired */
1270         sio_data->has_fanout = (1 << 0);                /* FANOUT0 */
1271         if (cfg_b & (1 << 0))
1272                 sio_data->has_fanout |= (1 << 3);       /* FANOUT3 */
1273 
1274         cfg = superio_inb(sioaddr, SIOREG_CFC);
1275         if (!(cfg & (1 << 4))) {
1276                 if (cfg_b & (1 << 1))
1277                         sio_data->has_fanout |= (1 << 1); /* FANOUT1 */
1278                 if (cfg_b & (1 << 2))
1279                         sio_data->has_fanout |= (1 << 2); /* FANOUT2 */
1280         }
1281 
1282         /* FANOUT1 and FANOUT2 can each be routed to 2 different pins */
1283         cfg = superio_inb(sioaddr, SIOREG_CF5);
1284         if (cfg & (1 << 6))
1285                 sio_data->has_fanout |= (1 << 1);       /* FANOUT1 */
1286         if (cfg & (1 << 5))
1287                 sio_data->has_fanout |= (1 << 2);       /* FANOUT2 */
1288 
1289 exit:
1290         superio_exit(sioaddr);
1291         return err;
1292 }
1293 
1294 static int __init pc87427_init(void)
1295 {
1296         int err;
1297         struct pc87427_sio_data sio_data;
1298 
1299         if (pc87427_find(0x2e, &sio_data)
1300          && pc87427_find(0x4e, &sio_data))
1301                 return -ENODEV;
1302 
1303         err = platform_driver_register(&pc87427_driver);
1304         if (err)
1305                 goto exit;
1306 
1307         /* Sets global pdev as a side effect */
1308         err = pc87427_device_add(&sio_data);
1309         if (err)
1310                 goto exit_driver;
1311 
1312         return 0;
1313 
1314 exit_driver:
1315         platform_driver_unregister(&pc87427_driver);
1316 exit:
1317         return err;
1318 }
1319 
1320 static void __exit pc87427_exit(void)
1321 {
1322         platform_device_unregister(pdev);
1323         platform_driver_unregister(&pc87427_driver);
1324 }
1325 
1326 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
1327 MODULE_DESCRIPTION("PC87427 hardware monitoring driver");
1328 MODULE_LICENSE("GPL");
1329 
1330 module_init(pc87427_init);
1331 module_exit(pc87427_exit);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/hwmon/pc87427.c

DEFINITIONS
