linux/drivers/hwmon/vt1211.c
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   1/*
   2 * vt1211.c - driver for the VIA VT1211 Super-I/O chip integrated hardware
   3 *            monitoring features
   4 * Copyright (C) 2006 Juerg Haefliger <juergh@gmail.com>
   5 *
   6 * This driver is based on the driver for kernel 2.4 by Mark D. Studebaker
   7 * and its port to kernel 2.6 by Lars Ekman.
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License as published by
  11 * the Free Software Foundation; either version 2 of the License, or
  12 * (at your option) any later version.
  13 *
  14 * This program is distributed in the hope that it will be useful,
  15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 * GNU General Public License for more details.
  18 *
  19 * You should have received a copy of the GNU General Public License
  20 * along with this program; if not, write to the Free Software
  21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24#include <linux/module.h>
  25#include <linux/init.h>
  26#include <linux/slab.h>
  27#include <linux/jiffies.h>
  28#include <linux/platform_device.h>
  29#include <linux/hwmon.h>
  30#include <linux/hwmon-sysfs.h>
  31#include <linux/hwmon-vid.h>
  32#include <linux/err.h>
  33#include <linux/mutex.h>
  34#include <linux/ioport.h>
  35#include <asm/io.h>
  36
  37static int uch_config = -1;
  38module_param(uch_config, int, 0);
  39MODULE_PARM_DESC(uch_config, "Initialize the universal channel configuration");
  40
  41static int int_mode = -1;
  42module_param(int_mode, int, 0);
  43MODULE_PARM_DESC(int_mode, "Force the temperature interrupt mode");
  44
  45static unsigned short force_id;
  46module_param(force_id, ushort, 0);
  47MODULE_PARM_DESC(force_id, "Override the detected device ID");
  48
  49static struct platform_device *pdev;
  50
  51#define DRVNAME "vt1211"
  52
  53/* ---------------------------------------------------------------------
  54 * Registers
  55 *
  56 * The sensors are defined as follows.
  57 *
  58 * Sensor          Voltage Mode   Temp Mode   Notes (from the datasheet)
  59 * --------        ------------   ---------   --------------------------
  60 * Reading 1                      temp1       Intel thermal diode
  61 * Reading 3                      temp2       Internal thermal diode
  62 * UCH1/Reading2   in0            temp3       NTC type thermistor
  63 * UCH2            in1            temp4       +2.5V
  64 * UCH3            in2            temp5       VccP
  65 * UCH4            in3            temp6       +5V
  66 * UCH5            in4            temp7       +12V
  67 * 3.3V            in5                        Internal VDD (+3.3V)
  68 *
  69 * --------------------------------------------------------------------- */
  70
  71/* Voltages (in) numbered 0-5 (ix) */
  72#define VT1211_REG_IN(ix)               (0x21 + (ix))
  73#define VT1211_REG_IN_MIN(ix)           ((ix) == 0 ? 0x3e : 0x2a + 2 * (ix))
  74#define VT1211_REG_IN_MAX(ix)           ((ix) == 0 ? 0x3d : 0x29 + 2 * (ix))
  75
  76/* Temperatures (temp) numbered 0-6 (ix) */
  77static u8 regtemp[]     = {0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25};
  78static u8 regtempmax[]  = {0x39, 0x1d, 0x3d, 0x2b, 0x2d, 0x2f, 0x31};
  79static u8 regtemphyst[] = {0x3a, 0x1e, 0x3e, 0x2c, 0x2e, 0x30, 0x32};
  80
  81/* Fans numbered 0-1 (ix) */
  82#define VT1211_REG_FAN(ix)              (0x29 + (ix))
  83#define VT1211_REG_FAN_MIN(ix)          (0x3b + (ix))
  84#define VT1211_REG_FAN_DIV               0x47
  85
  86/* PWMs numbered 0-1 (ix) */
  87/* Auto points numbered 0-3 (ap) */
  88#define VT1211_REG_PWM(ix)              (0x60 + (ix))
  89#define VT1211_REG_PWM_CLK               0x50
  90#define VT1211_REG_PWM_CTL               0x51
  91#define VT1211_REG_PWM_AUTO_TEMP(ap)    (0x55 - (ap))
  92#define VT1211_REG_PWM_AUTO_PWM(ix, ap) (0x58 + 2 * (ix) - (ap))
  93
  94/* Miscellaneous registers */
  95#define VT1211_REG_CONFIG               0x40
  96#define VT1211_REG_ALARM1               0x41
  97#define VT1211_REG_ALARM2               0x42
  98#define VT1211_REG_VID                  0x45
  99#define VT1211_REG_UCH_CONFIG           0x4a
 100#define VT1211_REG_TEMP1_CONFIG         0x4b
 101#define VT1211_REG_TEMP2_CONFIG         0x4c
 102
 103/* In, temp & fan alarm bits */
 104static const u8 bitalarmin[]    = {11, 0, 1, 3, 8, 2, 9};
 105static const u8 bitalarmtemp[]  = {4, 15, 11, 0, 1, 3, 8};
 106static const u8 bitalarmfan[]   = {6, 7};
 107
 108/* ---------------------------------------------------------------------
 109 * Data structures and manipulation thereof
 110 * --------------------------------------------------------------------- */
 111
 112struct vt1211_data {
 113        unsigned short addr;
 114        const char *name;
 115        struct device *hwmon_dev;
 116
 117        struct mutex update_lock;
 118        char valid;                     /* !=0 if following fields are valid */
 119        unsigned long last_updated;     /* In jiffies */
 120
 121        /* Register values */
 122        u8  in[6];
 123        u8  in_max[6];
 124        u8  in_min[6];
 125        u8  temp[7];
 126        u8  temp_max[7];
 127        u8  temp_hyst[7];
 128        u8  fan[2];
 129        u8  fan_min[2];
 130        u8  fan_div[2];
 131        u8  fan_ctl;
 132        u8  pwm[2];
 133        u8  pwm_ctl[2];
 134        u8  pwm_clk;
 135        u8  pwm_auto_temp[4];
 136        u8  pwm_auto_pwm[2][4];
 137        u8  vid;                /* Read once at init time */
 138        u8  vrm;
 139        u8  uch_config;         /* Read once at init time */
 140        u16 alarms;
 141};
 142
 143/* ix = [0-5] */
 144#define ISVOLT(ix, uch_config)  ((ix) > 4 ? 1 : \
 145                                 !(((uch_config) >> ((ix) + 2)) & 1))
 146
 147/* ix = [0-6] */
 148#define ISTEMP(ix, uch_config)  ((ix) < 2 ? 1 : \
 149                                 ((uch_config) >> (ix)) & 1)
 150
 151/* in5 (ix = 5) is special. It's the internal 3.3V so it's scaled in the
 152   driver according to the VT1211 BIOS porting guide */
 153#define IN_FROM_REG(ix, reg)    ((reg) < 3 ? 0 : (ix) == 5 ? \
 154                                 (((reg) - 3) * 15882 + 479) / 958 : \
 155                                 (((reg) - 3) * 10000 + 479) / 958)
 156#define IN_TO_REG(ix, val)      (SENSORS_LIMIT((ix) == 5 ? \
 157                                 ((val) * 958 + 7941) / 15882 + 3 : \
 158                                 ((val) * 958 + 5000) / 10000 + 3, 0, 255))
 159
 160/* temp1 (ix = 0) is an intel thermal diode which is scaled in user space.
 161   temp2 (ix = 1) is the internal temp diode so it's scaled in the driver
 162   according to some measurements that I took on an EPIA M10000.
 163   temp3-7 are thermistor based so the driver returns the voltage measured at
 164   the pin (range 0V - 2.2V). */
 165#define TEMP_FROM_REG(ix, reg)  ((ix) == 0 ? (reg) * 1000 : \
 166                                 (ix) == 1 ? (reg) < 51 ? 0 : \
 167                                 ((reg) - 51) * 1000 : \
 168                                 ((253 - (reg)) * 2200 + 105) / 210)
 169#define TEMP_TO_REG(ix, val)    SENSORS_LIMIT( \
 170                                 ((ix) == 0 ? ((val) + 500) / 1000 : \
 171                                  (ix) == 1 ? ((val) + 500) / 1000 + 51 : \
 172                                  253 - ((val) * 210 + 1100) / 2200), 0, 255)
 173
 174#define DIV_FROM_REG(reg)       (1 << (reg))
 175
 176#define RPM_FROM_REG(reg, div)  (((reg) == 0) || ((reg) == 255) ? 0 : \
 177                                 1310720 / (reg) / DIV_FROM_REG(div))
 178#define RPM_TO_REG(val, div)    ((val) == 0 ? 255 : \
 179                                 SENSORS_LIMIT((1310720 / (val) / \
 180                                 DIV_FROM_REG(div)), 1, 254))
 181
 182/* ---------------------------------------------------------------------
 183 * Super-I/O constants and functions
 184 * --------------------------------------------------------------------- */
 185
 186/* Configuration index port registers
 187 * The vt1211 can live at 2 different addresses so we need to probe both */
 188#define SIO_REG_CIP1            0x2e
 189#define SIO_REG_CIP2            0x4e
 190
 191/* Configuration registers */
 192#define SIO_VT1211_LDN          0x07    /* logical device number */
 193#define SIO_VT1211_DEVID        0x20    /* device ID */
 194#define SIO_VT1211_DEVREV       0x21    /* device revision */
 195#define SIO_VT1211_ACTIVE       0x30    /* HW monitor active */
 196#define SIO_VT1211_BADDR        0x60    /* base I/O address */
 197#define SIO_VT1211_ID           0x3c    /* VT1211 device ID */
 198
 199/* VT1211 logical device numbers */
 200#define SIO_VT1211_LDN_HWMON    0x0b    /* HW monitor */
 201
 202static inline void superio_outb(int sio_cip, int reg, int val)
 203{
 204        outb(reg, sio_cip);
 205        outb(val, sio_cip + 1);
 206}
 207
 208static inline int superio_inb(int sio_cip, int reg)
 209{
 210        outb(reg, sio_cip);
 211        return inb(sio_cip + 1);
 212}
 213
 214static inline void superio_select(int sio_cip, int ldn)
 215{
 216        outb(SIO_VT1211_LDN, sio_cip);
 217        outb(ldn, sio_cip + 1);
 218}
 219
 220static inline void superio_enter(int sio_cip)
 221{
 222        outb(0x87, sio_cip);
 223        outb(0x87, sio_cip);
 224}
 225
 226static inline void superio_exit(int sio_cip)
 227{
 228        outb(0xaa, sio_cip);
 229}
 230
 231/* ---------------------------------------------------------------------
 232 * Device I/O access
 233 * --------------------------------------------------------------------- */
 234
 235static inline u8 vt1211_read8(struct vt1211_data *data, u8 reg)
 236{
 237        return inb(data->addr + reg);
 238}
 239
 240static inline void vt1211_write8(struct vt1211_data *data, u8 reg, u8 val)
 241{
 242        outb(val, data->addr + reg);
 243}
 244
 245static struct vt1211_data *vt1211_update_device(struct device *dev)
 246{
 247        struct vt1211_data *data = dev_get_drvdata(dev);
 248        int ix, val;
 249
 250        mutex_lock(&data->update_lock);
 251
 252        /* registers cache is refreshed after 1 second */
 253        if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
 254                /* read VID */
 255                data->vid = vt1211_read8(data, VT1211_REG_VID) & 0x1f;
 256
 257                /* voltage (in) registers */
 258                for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
 259                        if (ISVOLT(ix, data->uch_config)) {
 260                                data->in[ix] = vt1211_read8(data,
 261                                                VT1211_REG_IN(ix));
 262                                data->in_min[ix] = vt1211_read8(data,
 263                                                VT1211_REG_IN_MIN(ix));
 264                                data->in_max[ix] = vt1211_read8(data,
 265                                                VT1211_REG_IN_MAX(ix));
 266                        }
 267                }
 268
 269                /* temp registers */
 270                for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) {
 271                        if (ISTEMP(ix, data->uch_config)) {
 272                                data->temp[ix] = vt1211_read8(data,
 273                                                regtemp[ix]);
 274                                data->temp_max[ix] = vt1211_read8(data,
 275                                                regtempmax[ix]);
 276                                data->temp_hyst[ix] = vt1211_read8(data,
 277                                                regtemphyst[ix]);
 278                        }
 279                }
 280
 281                /* fan & pwm registers */
 282                for (ix = 0; ix < ARRAY_SIZE(data->fan); ix++) {
 283                        data->fan[ix] = vt1211_read8(data,
 284                                                VT1211_REG_FAN(ix));
 285                        data->fan_min[ix] = vt1211_read8(data,
 286                                                VT1211_REG_FAN_MIN(ix));
 287                        data->pwm[ix] = vt1211_read8(data,
 288                                                VT1211_REG_PWM(ix));
 289                }
 290                val = vt1211_read8(data, VT1211_REG_FAN_DIV);
 291                data->fan_div[0] = (val >> 4) & 3;
 292                data->fan_div[1] = (val >> 6) & 3;
 293                data->fan_ctl = val & 0xf;
 294
 295                val = vt1211_read8(data, VT1211_REG_PWM_CTL);
 296                data->pwm_ctl[0] = val & 0xf;
 297                data->pwm_ctl[1] = (val >> 4) & 0xf;
 298
 299                data->pwm_clk = vt1211_read8(data, VT1211_REG_PWM_CLK);
 300
 301                /* pwm & temp auto point registers */
 302                data->pwm_auto_pwm[0][1] = vt1211_read8(data,
 303                                                VT1211_REG_PWM_AUTO_PWM(0, 1));
 304                data->pwm_auto_pwm[0][2] = vt1211_read8(data,
 305                                                VT1211_REG_PWM_AUTO_PWM(0, 2));
 306                data->pwm_auto_pwm[1][1] = vt1211_read8(data,
 307                                                VT1211_REG_PWM_AUTO_PWM(1, 1));
 308                data->pwm_auto_pwm[1][2] = vt1211_read8(data,
 309                                                VT1211_REG_PWM_AUTO_PWM(1, 2));
 310                for (ix = 0; ix < ARRAY_SIZE(data->pwm_auto_temp); ix++) {
 311                        data->pwm_auto_temp[ix] = vt1211_read8(data,
 312                                                VT1211_REG_PWM_AUTO_TEMP(ix));
 313                }
 314
 315                /* alarm registers */
 316                data->alarms = (vt1211_read8(data, VT1211_REG_ALARM2) << 8) |
 317                                vt1211_read8(data, VT1211_REG_ALARM1);
 318
 319                data->last_updated = jiffies;
 320                data->valid = 1;
 321        }
 322
 323        mutex_unlock(&data->update_lock);
 324
 325        return data;
 326}
 327
 328/* ---------------------------------------------------------------------
 329 * Voltage sysfs interfaces
 330 * ix = [0-5]
 331 * --------------------------------------------------------------------- */
 332
 333#define SHOW_IN_INPUT   0
 334#define SHOW_SET_IN_MIN 1
 335#define SHOW_SET_IN_MAX 2
 336#define SHOW_IN_ALARM   3
 337
 338static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 339                       char *buf)
 340{
 341        struct vt1211_data *data = vt1211_update_device(dev);
 342        struct sensor_device_attribute_2 *sensor_attr_2 =
 343                                                to_sensor_dev_attr_2(attr);
 344        int ix = sensor_attr_2->index;
 345        int fn = sensor_attr_2->nr;
 346        int res;
 347
 348        switch (fn) {
 349        case SHOW_IN_INPUT:
 350                res = IN_FROM_REG(ix, data->in[ix]);
 351                break;
 352        case SHOW_SET_IN_MIN:
 353                res = IN_FROM_REG(ix, data->in_min[ix]);
 354                break;
 355        case SHOW_SET_IN_MAX:
 356                res = IN_FROM_REG(ix, data->in_max[ix]);
 357                break;
 358        case SHOW_IN_ALARM:
 359                res = (data->alarms >> bitalarmin[ix]) & 1;
 360                break;
 361        default:
 362                res = 0;
 363                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 364        }
 365
 366        return sprintf(buf, "%d\n", res);
 367}
 368
 369static ssize_t set_in(struct device *dev, struct device_attribute *attr,
 370                      const char *buf, size_t count)
 371{
 372        struct vt1211_data *data = dev_get_drvdata(dev);
 373        struct sensor_device_attribute_2 *sensor_attr_2 =
 374                                                to_sensor_dev_attr_2(attr);
 375        int ix = sensor_attr_2->index;
 376        int fn = sensor_attr_2->nr;
 377        long val = simple_strtol(buf, NULL, 10);
 378
 379        mutex_lock(&data->update_lock);
 380        switch (fn) {
 381        case SHOW_SET_IN_MIN:
 382                data->in_min[ix] = IN_TO_REG(ix, val);
 383                vt1211_write8(data, VT1211_REG_IN_MIN(ix), data->in_min[ix]);
 384                break;
 385        case SHOW_SET_IN_MAX:
 386                data->in_max[ix] = IN_TO_REG(ix, val);
 387                vt1211_write8(data, VT1211_REG_IN_MAX(ix), data->in_max[ix]);
 388                break;
 389        default:
 390                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 391        }
 392        mutex_unlock(&data->update_lock);
 393
 394        return count;
 395}
 396
 397/* ---------------------------------------------------------------------
 398 * Temperature sysfs interfaces
 399 * ix = [0-6]
 400 * --------------------------------------------------------------------- */
 401
 402#define SHOW_TEMP_INPUT         0
 403#define SHOW_SET_TEMP_MAX       1
 404#define SHOW_SET_TEMP_MAX_HYST  2
 405#define SHOW_TEMP_ALARM         3
 406
 407static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 408                         char *buf)
 409{
 410        struct vt1211_data *data = vt1211_update_device(dev);
 411        struct sensor_device_attribute_2 *sensor_attr_2 =
 412                                                to_sensor_dev_attr_2(attr);
 413        int ix = sensor_attr_2->index;
 414        int fn = sensor_attr_2->nr;
 415        int res;
 416
 417        switch (fn) {
 418        case SHOW_TEMP_INPUT:
 419                res = TEMP_FROM_REG(ix, data->temp[ix]);
 420                break;
 421        case SHOW_SET_TEMP_MAX:
 422                res = TEMP_FROM_REG(ix, data->temp_max[ix]);
 423                break;
 424        case SHOW_SET_TEMP_MAX_HYST:
 425                res = TEMP_FROM_REG(ix, data->temp_hyst[ix]);
 426                break;
 427        case SHOW_TEMP_ALARM:
 428                res = (data->alarms >> bitalarmtemp[ix]) & 1;
 429                break;
 430        default:
 431                res = 0;
 432                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 433        }
 434
 435        return sprintf(buf, "%d\n", res);
 436}
 437
 438static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
 439                        const char *buf, size_t count)
 440{
 441        struct vt1211_data *data = dev_get_drvdata(dev);
 442        struct sensor_device_attribute_2 *sensor_attr_2 =
 443                                                to_sensor_dev_attr_2(attr);
 444        int ix = sensor_attr_2->index;
 445        int fn = sensor_attr_2->nr;
 446        long val = simple_strtol(buf, NULL, 10);
 447
 448        mutex_lock(&data->update_lock);
 449        switch (fn) {
 450        case SHOW_SET_TEMP_MAX:
 451                data->temp_max[ix] = TEMP_TO_REG(ix, val);
 452                vt1211_write8(data, regtempmax[ix],
 453                              data->temp_max[ix]);
 454                break;
 455        case SHOW_SET_TEMP_MAX_HYST:
 456                data->temp_hyst[ix] = TEMP_TO_REG(ix, val);
 457                vt1211_write8(data, regtemphyst[ix],
 458                              data->temp_hyst[ix]);
 459                break;
 460        default:
 461                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 462        }
 463        mutex_unlock(&data->update_lock);
 464
 465        return count;
 466}
 467
 468/* ---------------------------------------------------------------------
 469 * Fan sysfs interfaces
 470 * ix = [0-1]
 471 * --------------------------------------------------------------------- */
 472
 473#define SHOW_FAN_INPUT          0
 474#define SHOW_SET_FAN_MIN        1
 475#define SHOW_SET_FAN_DIV        2
 476#define SHOW_FAN_ALARM          3
 477
 478static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 479                        char *buf)
 480{
 481        struct vt1211_data *data = vt1211_update_device(dev);
 482        struct sensor_device_attribute_2 *sensor_attr_2 =
 483                                                to_sensor_dev_attr_2(attr);
 484        int ix = sensor_attr_2->index;
 485        int fn = sensor_attr_2->nr;
 486        int res;
 487
 488        switch (fn) {
 489        case SHOW_FAN_INPUT:
 490                res = RPM_FROM_REG(data->fan[ix], data->fan_div[ix]);
 491                break;
 492        case SHOW_SET_FAN_MIN:
 493                res = RPM_FROM_REG(data->fan_min[ix], data->fan_div[ix]);
 494                break;
 495        case SHOW_SET_FAN_DIV:
 496                res = DIV_FROM_REG(data->fan_div[ix]);
 497                break;
 498        case SHOW_FAN_ALARM:
 499                res = (data->alarms >> bitalarmfan[ix]) & 1;
 500                break;
 501        default:
 502                res = 0;
 503                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 504        }
 505
 506        return sprintf(buf, "%d\n", res);
 507}
 508
 509static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
 510                       const char *buf, size_t count)
 511{
 512        struct vt1211_data *data = dev_get_drvdata(dev);
 513        struct sensor_device_attribute_2 *sensor_attr_2 =
 514                                                to_sensor_dev_attr_2(attr);
 515        int ix = sensor_attr_2->index;
 516        int fn = sensor_attr_2->nr;
 517        long val = simple_strtol(buf, NULL, 10);
 518        int reg;
 519
 520        mutex_lock(&data->update_lock);
 521
 522        /* sync the data cache */
 523        reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
 524        data->fan_div[0] = (reg >> 4) & 3;
 525        data->fan_div[1] = (reg >> 6) & 3;
 526        data->fan_ctl = reg & 0xf;
 527
 528        switch (fn) {
 529        case SHOW_SET_FAN_MIN:
 530                data->fan_min[ix] = RPM_TO_REG(val, data->fan_div[ix]);
 531                vt1211_write8(data, VT1211_REG_FAN_MIN(ix),
 532                              data->fan_min[ix]);
 533                break;
 534        case SHOW_SET_FAN_DIV:
 535                switch (val) {
 536                        case 1: data->fan_div[ix] = 0; break;
 537                        case 2: data->fan_div[ix] = 1; break;
 538                        case 4: data->fan_div[ix] = 2; break;
 539                        case 8: data->fan_div[ix] = 3; break;
 540                        default:
 541                                count = -EINVAL;
 542                                dev_warn(dev, "fan div value %ld not "
 543                                         "supported. Choose one of 1, 2, "
 544                                         "4, or 8.\n", val);
 545                                goto EXIT;
 546                }
 547                vt1211_write8(data, VT1211_REG_FAN_DIV,
 548                              ((data->fan_div[1] << 6) |
 549                               (data->fan_div[0] << 4) |
 550                                data->fan_ctl));
 551                break;
 552        default:
 553                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 554        }
 555
 556EXIT:
 557        mutex_unlock(&data->update_lock);
 558        return count;
 559}
 560
 561/* ---------------------------------------------------------------------
 562 * PWM sysfs interfaces
 563 * ix = [0-1]
 564 * --------------------------------------------------------------------- */
 565
 566#define SHOW_PWM                        0
 567#define SHOW_SET_PWM_ENABLE             1
 568#define SHOW_SET_PWM_FREQ               2
 569#define SHOW_SET_PWM_AUTO_CHANNELS_TEMP 3
 570
 571static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 572                        char *buf)
 573{
 574        struct vt1211_data *data = vt1211_update_device(dev);
 575        struct sensor_device_attribute_2 *sensor_attr_2 =
 576                                                to_sensor_dev_attr_2(attr);
 577        int ix = sensor_attr_2->index;
 578        int fn = sensor_attr_2->nr;
 579        int res;
 580
 581        switch (fn) {
 582        case SHOW_PWM:
 583                res = data->pwm[ix];
 584                break;
 585        case SHOW_SET_PWM_ENABLE:
 586                res = ((data->pwm_ctl[ix] >> 3) & 1) ? 2 : 0;
 587                break;
 588        case SHOW_SET_PWM_FREQ:
 589                res = 90000 >> (data->pwm_clk & 7);
 590                break;
 591        case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
 592                res = (data->pwm_ctl[ix] & 7) + 1;
 593                break;
 594        default:
 595                res = 0;
 596                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 597        }
 598
 599        return sprintf(buf, "%d\n", res);
 600}
 601
 602static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 603                       const char *buf, size_t count)
 604{
 605        struct vt1211_data *data = dev_get_drvdata(dev);
 606        struct sensor_device_attribute_2 *sensor_attr_2 =
 607                                                to_sensor_dev_attr_2(attr);
 608        int ix = sensor_attr_2->index;
 609        int fn = sensor_attr_2->nr;
 610        long val = simple_strtol(buf, NULL, 10);
 611        int tmp, reg;
 612
 613        mutex_lock(&data->update_lock);
 614
 615        switch (fn) {
 616        case SHOW_SET_PWM_ENABLE:
 617                /* sync the data cache */
 618                reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
 619                data->fan_div[0] = (reg >> 4) & 3;
 620                data->fan_div[1] = (reg >> 6) & 3;
 621                data->fan_ctl = reg & 0xf;
 622                reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
 623                data->pwm_ctl[0] = reg & 0xf;
 624                data->pwm_ctl[1] = (reg >> 4) & 0xf;
 625                switch (val) {
 626                case 0:
 627                        data->pwm_ctl[ix] &= 7;
 628                        /* disable SmartGuardian if both PWM outputs are
 629                         * disabled */
 630                        if ((data->pwm_ctl[ix ^ 1] & 1) == 0) {
 631                                data->fan_ctl &= 0xe;
 632                        }
 633                        break;
 634                case 2:
 635                        data->pwm_ctl[ix] |= 8;
 636                        data->fan_ctl |= 1;
 637                        break;
 638                default:
 639                        count = -EINVAL;
 640                        dev_warn(dev, "pwm mode %ld not supported. "
 641                                 "Choose one of 0 or 2.\n", val);
 642                        goto EXIT;
 643                }
 644                vt1211_write8(data, VT1211_REG_PWM_CTL,
 645                              ((data->pwm_ctl[1] << 4) |
 646                                data->pwm_ctl[0]));
 647                vt1211_write8(data, VT1211_REG_FAN_DIV,
 648                              ((data->fan_div[1] << 6) |
 649                               (data->fan_div[0] << 4) |
 650                                data->fan_ctl));
 651                break;
 652        case SHOW_SET_PWM_FREQ:
 653                val = 135000 / SENSORS_LIMIT(val, 135000 >> 7, 135000);
 654                /* calculate tmp = log2(val) */
 655                tmp = 0;
 656                for (val >>= 1; val > 0; val >>= 1) {
 657                        tmp++;
 658                }
 659                /* sync the data cache */
 660                reg = vt1211_read8(data, VT1211_REG_PWM_CLK);
 661                data->pwm_clk = (reg & 0xf8) | tmp;
 662                vt1211_write8(data, VT1211_REG_PWM_CLK, data->pwm_clk);
 663                break;
 664        case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
 665                if ((val < 1) || (val > 7)) {
 666                        count = -EINVAL;
 667                        dev_warn(dev, "temp channel %ld not supported. "
 668                                 "Choose a value between 1 and 7.\n", val);
 669                        goto EXIT;
 670                }
 671                if (!ISTEMP(val - 1, data->uch_config)) {
 672                        count = -EINVAL;
 673                        dev_warn(dev, "temp channel %ld is not available.\n",
 674                                 val);
 675                        goto EXIT;
 676                }
 677                /* sync the data cache */
 678                reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
 679                data->pwm_ctl[0] = reg & 0xf;
 680                data->pwm_ctl[1] = (reg >> 4) & 0xf;
 681                data->pwm_ctl[ix] = (data->pwm_ctl[ix] & 8) | (val - 1);
 682                vt1211_write8(data, VT1211_REG_PWM_CTL,
 683                              ((data->pwm_ctl[1] << 4) | data->pwm_ctl[0]));
 684                break;
 685        default:
 686                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 687        }
 688
 689EXIT:
 690        mutex_unlock(&data->update_lock);
 691        return count;
 692}
 693
 694/* ---------------------------------------------------------------------
 695 * PWM auto point definitions
 696 * ix = [0-1]
 697 * ap = [0-3]
 698 * --------------------------------------------------------------------- */
 699
 700/*
 701 * pwm[ix+1]_auto_point[ap+1]_temp mapping table:
 702 * Note that there is only a single set of temp auto points that controls both
 703 * PWM controllers. We still create 2 sets of sysfs files to make it look
 704 * more consistent even though they map to the same registers.
 705 *
 706 * ix ap : description
 707 * -------------------
 708 * 0  0  : pwm1/2 off temperature        (pwm_auto_temp[0])
 709 * 0  1  : pwm1/2 low speed temperature  (pwm_auto_temp[1])
 710 * 0  2  : pwm1/2 high speed temperature (pwm_auto_temp[2])
 711 * 0  3  : pwm1/2 full speed temperature (pwm_auto_temp[3])
 712 * 1  0  : pwm1/2 off temperature        (pwm_auto_temp[0])
 713 * 1  1  : pwm1/2 low speed temperature  (pwm_auto_temp[1])
 714 * 1  2  : pwm1/2 high speed temperature (pwm_auto_temp[2])
 715 * 1  3  : pwm1/2 full speed temperature (pwm_auto_temp[3])
 716 */
 717
 718static ssize_t show_pwm_auto_point_temp(struct device *dev,
 719                                        struct device_attribute *attr,
 720                                        char *buf)
 721{
 722        struct vt1211_data *data = vt1211_update_device(dev);
 723        struct sensor_device_attribute_2 *sensor_attr_2 =
 724                                                to_sensor_dev_attr_2(attr);
 725        int ix = sensor_attr_2->index;
 726        int ap = sensor_attr_2->nr;
 727
 728        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->pwm_ctl[ix] & 7,
 729                       data->pwm_auto_temp[ap]));
 730}
 731
 732static ssize_t set_pwm_auto_point_temp(struct device *dev,
 733                                       struct device_attribute *attr,
 734                                       const char *buf, size_t count)
 735{
 736        struct vt1211_data *data = dev_get_drvdata(dev);
 737        struct sensor_device_attribute_2 *sensor_attr_2 =
 738                                                to_sensor_dev_attr_2(attr);
 739        int ix = sensor_attr_2->index;
 740        int ap = sensor_attr_2->nr;
 741        long val = simple_strtol(buf, NULL, 10);
 742        int reg;
 743
 744        mutex_lock(&data->update_lock);
 745
 746        /* sync the data cache */
 747        reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
 748        data->pwm_ctl[0] = reg & 0xf;
 749        data->pwm_ctl[1] = (reg >> 4) & 0xf;
 750
 751        data->pwm_auto_temp[ap] = TEMP_TO_REG(data->pwm_ctl[ix] & 7, val);
 752        vt1211_write8(data, VT1211_REG_PWM_AUTO_TEMP(ap),
 753                      data->pwm_auto_temp[ap]);
 754        mutex_unlock(&data->update_lock);
 755
 756        return count;
 757}
 758
 759/*
 760 * pwm[ix+1]_auto_point[ap+1]_pwm mapping table:
 761 * Note that the PWM auto points 0 & 3 are hard-wired in the VT1211 and can't
 762 * be changed.
 763 *
 764 * ix ap : description
 765 * -------------------
 766 * 0  0  : pwm1 off                   (pwm_auto_pwm[0][0], hard-wired to 0)
 767 * 0  1  : pwm1 low speed duty cycle  (pwm_auto_pwm[0][1])
 768 * 0  2  : pwm1 high speed duty cycle (pwm_auto_pwm[0][2])
 769 * 0  3  : pwm1 full speed            (pwm_auto_pwm[0][3], hard-wired to 255)
 770 * 1  0  : pwm2 off                   (pwm_auto_pwm[1][0], hard-wired to 0)
 771 * 1  1  : pwm2 low speed duty cycle  (pwm_auto_pwm[1][1])
 772 * 1  2  : pwm2 high speed duty cycle (pwm_auto_pwm[1][2])
 773 * 1  3  : pwm2 full speed            (pwm_auto_pwm[1][3], hard-wired to 255)
 774*/
 775
 776static ssize_t show_pwm_auto_point_pwm(struct device *dev,
 777                                       struct device_attribute *attr,
 778                                       char *buf)
 779{
 780        struct vt1211_data *data = vt1211_update_device(dev);
 781        struct sensor_device_attribute_2 *sensor_attr_2 =
 782                                                to_sensor_dev_attr_2(attr);
 783        int ix = sensor_attr_2->index;
 784        int ap = sensor_attr_2->nr;
 785
 786        return sprintf(buf, "%d\n", data->pwm_auto_pwm[ix][ap]);
 787}
 788
 789static ssize_t set_pwm_auto_point_pwm(struct device *dev,
 790                                      struct device_attribute *attr,
 791                                      const char *buf, size_t count)
 792{
 793        struct vt1211_data *data = dev_get_drvdata(dev);
 794        struct sensor_device_attribute_2 *sensor_attr_2 =
 795                                                to_sensor_dev_attr_2(attr);
 796        int ix = sensor_attr_2->index;
 797        int ap = sensor_attr_2->nr;
 798        long val = simple_strtol(buf, NULL, 10);
 799
 800        if ((val < 0) || (val > 255)) {
 801                dev_err(dev, "pwm value %ld is out of range. "
 802                        "Choose a value between 0 and 255.\n" , val);
 803                return -EINVAL;
 804        }
 805
 806        mutex_lock(&data->update_lock);
 807        data->pwm_auto_pwm[ix][ap] = val;
 808        vt1211_write8(data, VT1211_REG_PWM_AUTO_PWM(ix, ap),
 809                      data->pwm_auto_pwm[ix][ap]);
 810        mutex_unlock(&data->update_lock);
 811
 812        return count;
 813}
 814
 815/* ---------------------------------------------------------------------
 816 * Miscellaneous sysfs interfaces (VRM, VID, name, and (legacy) alarms)
 817 * --------------------------------------------------------------------- */
 818
 819static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
 820                        char *buf)
 821{
 822        struct vt1211_data *data = dev_get_drvdata(dev);
 823
 824        return sprintf(buf, "%d\n", data->vrm);
 825}
 826
 827static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
 828                       const char *buf, size_t count)
 829{
 830        struct vt1211_data *data = dev_get_drvdata(dev);
 831        long val = simple_strtol(buf, NULL, 10);
 832
 833        data->vrm = val;
 834
 835        return count;
 836}
 837
 838static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
 839                        char *buf)
 840{
 841        struct vt1211_data *data = dev_get_drvdata(dev);
 842
 843        return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
 844}
 845
 846static ssize_t show_name(struct device *dev,
 847                         struct device_attribute *attr, char *buf)
 848{
 849        struct vt1211_data *data = dev_get_drvdata(dev);
 850
 851        return sprintf(buf, "%s\n", data->name);
 852}
 853
 854static ssize_t show_alarms(struct device *dev,
 855                           struct device_attribute *attr, char *buf)
 856{
 857        struct vt1211_data *data = vt1211_update_device(dev);
 858
 859        return sprintf(buf, "%d\n", data->alarms);
 860}
 861
 862/* ---------------------------------------------------------------------
 863 * Device attribute structs
 864 * --------------------------------------------------------------------- */
 865
 866#define SENSOR_ATTR_IN_INPUT(ix) \
 867        SENSOR_ATTR_2(in##ix##_input, S_IRUGO, \
 868                show_in, NULL, SHOW_IN_INPUT, ix)
 869
 870static struct sensor_device_attribute_2 vt1211_sysfs_in_input[] = {
 871        SENSOR_ATTR_IN_INPUT(0),
 872        SENSOR_ATTR_IN_INPUT(1),
 873        SENSOR_ATTR_IN_INPUT(2),
 874        SENSOR_ATTR_IN_INPUT(3),
 875        SENSOR_ATTR_IN_INPUT(4),
 876        SENSOR_ATTR_IN_INPUT(5),
 877};
 878
 879#define SENSOR_ATTR_IN_MIN(ix) \
 880        SENSOR_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \
 881                show_in, set_in, SHOW_SET_IN_MIN, ix)
 882
 883static struct sensor_device_attribute_2 vt1211_sysfs_in_min[] = {
 884        SENSOR_ATTR_IN_MIN(0),
 885        SENSOR_ATTR_IN_MIN(1),
 886        SENSOR_ATTR_IN_MIN(2),
 887        SENSOR_ATTR_IN_MIN(3),
 888        SENSOR_ATTR_IN_MIN(4),
 889        SENSOR_ATTR_IN_MIN(5),
 890};
 891
 892#define SENSOR_ATTR_IN_MAX(ix) \
 893        SENSOR_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \
 894                show_in, set_in, SHOW_SET_IN_MAX, ix)
 895
 896static struct sensor_device_attribute_2 vt1211_sysfs_in_max[] = {
 897        SENSOR_ATTR_IN_MAX(0),
 898        SENSOR_ATTR_IN_MAX(1),
 899        SENSOR_ATTR_IN_MAX(2),
 900        SENSOR_ATTR_IN_MAX(3),
 901        SENSOR_ATTR_IN_MAX(4),
 902        SENSOR_ATTR_IN_MAX(5),
 903};
 904
 905#define SENSOR_ATTR_IN_ALARM(ix) \
 906        SENSOR_ATTR_2(in##ix##_alarm, S_IRUGO, \
 907                show_in, NULL, SHOW_IN_ALARM, ix)
 908
 909static struct sensor_device_attribute_2 vt1211_sysfs_in_alarm[] = {
 910        SENSOR_ATTR_IN_ALARM(0),
 911        SENSOR_ATTR_IN_ALARM(1),
 912        SENSOR_ATTR_IN_ALARM(2),
 913        SENSOR_ATTR_IN_ALARM(3),
 914        SENSOR_ATTR_IN_ALARM(4),
 915        SENSOR_ATTR_IN_ALARM(5),
 916};
 917
 918#define SENSOR_ATTR_TEMP_INPUT(ix) \
 919        SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \
 920                show_temp, NULL, SHOW_TEMP_INPUT, ix-1)
 921
 922static struct sensor_device_attribute_2 vt1211_sysfs_temp_input[] = {
 923        SENSOR_ATTR_TEMP_INPUT(1),
 924        SENSOR_ATTR_TEMP_INPUT(2),
 925        SENSOR_ATTR_TEMP_INPUT(3),
 926        SENSOR_ATTR_TEMP_INPUT(4),
 927        SENSOR_ATTR_TEMP_INPUT(5),
 928        SENSOR_ATTR_TEMP_INPUT(6),
 929        SENSOR_ATTR_TEMP_INPUT(7),
 930};
 931
 932#define SENSOR_ATTR_TEMP_MAX(ix) \
 933        SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
 934                show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1)
 935
 936static struct sensor_device_attribute_2 vt1211_sysfs_temp_max[] = {
 937        SENSOR_ATTR_TEMP_MAX(1),
 938        SENSOR_ATTR_TEMP_MAX(2),
 939        SENSOR_ATTR_TEMP_MAX(3),
 940        SENSOR_ATTR_TEMP_MAX(4),
 941        SENSOR_ATTR_TEMP_MAX(5),
 942        SENSOR_ATTR_TEMP_MAX(6),
 943        SENSOR_ATTR_TEMP_MAX(7),
 944};
 945
 946#define SENSOR_ATTR_TEMP_MAX_HYST(ix) \
 947        SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \
 948                show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1)
 949
 950static struct sensor_device_attribute_2 vt1211_sysfs_temp_max_hyst[] = {
 951        SENSOR_ATTR_TEMP_MAX_HYST(1),
 952        SENSOR_ATTR_TEMP_MAX_HYST(2),
 953        SENSOR_ATTR_TEMP_MAX_HYST(3),
 954        SENSOR_ATTR_TEMP_MAX_HYST(4),
 955        SENSOR_ATTR_TEMP_MAX_HYST(5),
 956        SENSOR_ATTR_TEMP_MAX_HYST(6),
 957        SENSOR_ATTR_TEMP_MAX_HYST(7),
 958};
 959
 960#define SENSOR_ATTR_TEMP_ALARM(ix) \
 961        SENSOR_ATTR_2(temp##ix##_alarm, S_IRUGO, \
 962                show_temp, NULL, SHOW_TEMP_ALARM, ix-1)
 963
 964static struct sensor_device_attribute_2 vt1211_sysfs_temp_alarm[] = {
 965        SENSOR_ATTR_TEMP_ALARM(1),
 966        SENSOR_ATTR_TEMP_ALARM(2),
 967        SENSOR_ATTR_TEMP_ALARM(3),
 968        SENSOR_ATTR_TEMP_ALARM(4),
 969        SENSOR_ATTR_TEMP_ALARM(5),
 970        SENSOR_ATTR_TEMP_ALARM(6),
 971        SENSOR_ATTR_TEMP_ALARM(7),
 972};
 973
 974#define SENSOR_ATTR_FAN(ix) \
 975        SENSOR_ATTR_2(fan##ix##_input, S_IRUGO, \
 976                show_fan, NULL, SHOW_FAN_INPUT, ix-1), \
 977        SENSOR_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
 978                show_fan, set_fan, SHOW_SET_FAN_MIN, ix-1), \
 979        SENSOR_ATTR_2(fan##ix##_div, S_IRUGO | S_IWUSR, \
 980                show_fan, set_fan, SHOW_SET_FAN_DIV, ix-1), \
 981        SENSOR_ATTR_2(fan##ix##_alarm, S_IRUGO, \
 982                show_fan, NULL, SHOW_FAN_ALARM, ix-1)
 983
 984#define SENSOR_ATTR_PWM(ix) \
 985        SENSOR_ATTR_2(pwm##ix, S_IRUGO, \
 986                show_pwm, NULL, SHOW_PWM, ix-1), \
 987        SENSOR_ATTR_2(pwm##ix##_enable, S_IRUGO | S_IWUSR, \
 988                show_pwm, set_pwm, SHOW_SET_PWM_ENABLE, ix-1), \
 989        SENSOR_ATTR_2(pwm##ix##_auto_channels_temp, S_IRUGO | S_IWUSR, \
 990                show_pwm, set_pwm, SHOW_SET_PWM_AUTO_CHANNELS_TEMP, ix-1)
 991
 992#define SENSOR_ATTR_PWM_FREQ(ix) \
 993        SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \
 994                show_pwm, set_pwm, SHOW_SET_PWM_FREQ, ix-1)
 995
 996#define SENSOR_ATTR_PWM_FREQ_RO(ix) \
 997        SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO, \
 998                show_pwm, NULL, SHOW_SET_PWM_FREQ, ix-1)
 999
1000#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) \
1001        SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO | S_IWUSR, \
1002                show_pwm_auto_point_temp, set_pwm_auto_point_temp, \
1003                ap-1, ix-1)
1004
1005#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) \
1006        SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO, \
1007                show_pwm_auto_point_temp, NULL, \
1008                ap-1, ix-1)
1009
1010#define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) \
1011        SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO | S_IWUSR, \
1012                show_pwm_auto_point_pwm, set_pwm_auto_point_pwm, \
1013                ap-1, ix-1)
1014
1015#define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) \
1016        SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO, \
1017                show_pwm_auto_point_pwm, NULL, \
1018                ap-1, ix-1)
1019
1020static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = {
1021        SENSOR_ATTR_FAN(1),
1022        SENSOR_ATTR_FAN(2),
1023        SENSOR_ATTR_PWM(1),
1024        SENSOR_ATTR_PWM(2),
1025        SENSOR_ATTR_PWM_FREQ(1),
1026        SENSOR_ATTR_PWM_FREQ_RO(2),
1027        SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 1),
1028        SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 2),
1029        SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 3),
1030        SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 4),
1031        SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 1),
1032        SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 2),
1033        SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 3),
1034        SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 4),
1035        SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 1),
1036        SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 2),
1037        SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 3),
1038        SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 4),
1039        SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 1),
1040        SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 2),
1041        SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 3),
1042        SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 4),
1043};
1044
1045static struct device_attribute vt1211_sysfs_misc[] = {
1046        __ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm),
1047        __ATTR(cpu0_vid, S_IRUGO, show_vid, NULL),
1048        __ATTR(name, S_IRUGO, show_name, NULL),
1049        __ATTR(alarms, S_IRUGO, show_alarms, NULL),
1050};
1051
1052/* ---------------------------------------------------------------------
1053 * Device registration and initialization
1054 * --------------------------------------------------------------------- */
1055
1056static void __devinit vt1211_init_device(struct vt1211_data *data)
1057{
1058        /* set VRM */
1059        data->vrm = vid_which_vrm();
1060
1061        /* Read (and initialize) UCH config */
1062        data->uch_config = vt1211_read8(data, VT1211_REG_UCH_CONFIG);
1063        if (uch_config > -1) {
1064                data->uch_config = (data->uch_config & 0x83) |
1065                                   (uch_config << 2);
1066                vt1211_write8(data, VT1211_REG_UCH_CONFIG, data->uch_config);
1067        }
1068
1069        /* Initialize the interrupt mode (if request at module load time).
1070         * The VT1211 implements 3 different modes for clearing interrupts:
1071         * 0: Clear INT when status register is read. Regenerate INT as long
1072         *    as temp stays above hysteresis limit.
1073         * 1: Clear INT when status register is read. DON'T regenerate INT
1074         *    until temp falls below hysteresis limit and exceeds hot limit
1075         *    again.
1076         * 2: Clear INT when temp falls below max limit.
1077         *
1078         * The driver only allows to force mode 0 since that's the only one
1079         * that makes sense for 'sensors' */
1080        if (int_mode == 0) {
1081                vt1211_write8(data, VT1211_REG_TEMP1_CONFIG, 0);
1082                vt1211_write8(data, VT1211_REG_TEMP2_CONFIG, 0);
1083        }
1084
1085        /* Fill in some hard wired values into our data struct */
1086        data->pwm_auto_pwm[0][3] = 255;
1087        data->pwm_auto_pwm[1][3] = 255;
1088}
1089
1090static void vt1211_remove_sysfs(struct platform_device *pdev)
1091{
1092        struct device *dev = &pdev->dev;
1093        int i;
1094
1095        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_in_input); i++) {
1096                device_remove_file(dev,
1097                        &vt1211_sysfs_in_input[i].dev_attr);
1098                device_remove_file(dev,
1099                        &vt1211_sysfs_in_min[i].dev_attr);
1100                device_remove_file(dev,
1101                        &vt1211_sysfs_in_max[i].dev_attr);
1102                device_remove_file(dev,
1103                        &vt1211_sysfs_in_alarm[i].dev_attr);
1104        }
1105        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_temp_input); i++) {
1106                device_remove_file(dev,
1107                        &vt1211_sysfs_temp_input[i].dev_attr);
1108                device_remove_file(dev,
1109                        &vt1211_sysfs_temp_max[i].dev_attr);
1110                device_remove_file(dev,
1111                        &vt1211_sysfs_temp_max_hyst[i].dev_attr);
1112                device_remove_file(dev,
1113                        &vt1211_sysfs_temp_alarm[i].dev_attr);
1114        }
1115        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1116                device_remove_file(dev,
1117                        &vt1211_sysfs_fan_pwm[i].dev_attr);
1118        }
1119        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
1120                device_remove_file(dev, &vt1211_sysfs_misc[i]);
1121        }
1122}
1123
1124static int __devinit vt1211_probe(struct platform_device *pdev)
1125{
1126        struct device *dev = &pdev->dev;
1127        struct vt1211_data *data;
1128        struct resource *res;
1129        int i, err;
1130
1131        if (!(data = kzalloc(sizeof(struct vt1211_data), GFP_KERNEL))) {
1132                err = -ENOMEM;
1133                dev_err(dev, "Out of memory\n");
1134                goto EXIT;
1135        }
1136
1137        res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1138        if (!request_region(res->start, res->end - res->start + 1, DRVNAME)) {
1139                err = -EBUSY;
1140                dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1141                        (unsigned long)res->start, (unsigned long)res->end);
1142                goto EXIT_KFREE;
1143        }
1144        data->addr = res->start;
1145        data->name = DRVNAME;
1146        mutex_init(&data->update_lock);
1147
1148        platform_set_drvdata(pdev, data);
1149
1150        /* Initialize the VT1211 chip */
1151        vt1211_init_device(data);
1152
1153        /* Create sysfs interface files */
1154        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_in_input); i++) {
1155                if (ISVOLT(i, data->uch_config)) {
1156                        if ((err = device_create_file(dev,
1157                                &vt1211_sysfs_in_input[i].dev_attr)) ||
1158                            (err = device_create_file(dev,
1159                                &vt1211_sysfs_in_min[i].dev_attr)) ||
1160                            (err = device_create_file(dev,
1161                                &vt1211_sysfs_in_max[i].dev_attr)) ||
1162                            (err = device_create_file(dev,
1163                                &vt1211_sysfs_in_alarm[i].dev_attr))) {
1164                                goto EXIT_DEV_REMOVE;
1165                        }
1166                }
1167        }
1168        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_temp_input); i++) {
1169                if (ISTEMP(i, data->uch_config)) {
1170                        if ((err = device_create_file(dev,
1171                                &vt1211_sysfs_temp_input[i].dev_attr)) ||
1172                            (err = device_create_file(dev,
1173                                &vt1211_sysfs_temp_max[i].dev_attr)) ||
1174                            (err = device_create_file(dev,
1175                                &vt1211_sysfs_temp_max_hyst[i].dev_attr)) ||
1176                            (err = device_create_file(dev,
1177                                &vt1211_sysfs_temp_alarm[i].dev_attr))) {
1178                                goto EXIT_DEV_REMOVE;
1179                        }
1180                }
1181        }
1182        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1183                err = device_create_file(dev,
1184                        &vt1211_sysfs_fan_pwm[i].dev_attr);
1185                if (err) {
1186                        goto EXIT_DEV_REMOVE;
1187                }
1188        }
1189        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
1190                err = device_create_file(dev,
1191                       &vt1211_sysfs_misc[i]);
1192                if (err) {
1193                        goto EXIT_DEV_REMOVE;
1194                }
1195        }
1196
1197        /* Register device */
1198        data->hwmon_dev = hwmon_device_register(dev);
1199        if (IS_ERR(data->hwmon_dev)) {
1200                err = PTR_ERR(data->hwmon_dev);
1201                dev_err(dev, "Class registration failed (%d)\n", err);
1202                goto EXIT_DEV_REMOVE_SILENT;
1203        }
1204
1205        return 0;
1206
1207EXIT_DEV_REMOVE:
1208        dev_err(dev, "Sysfs interface creation failed (%d)\n", err);
1209EXIT_DEV_REMOVE_SILENT:
1210        vt1211_remove_sysfs(pdev);
1211        release_region(res->start, res->end - res->start + 1);
1212EXIT_KFREE:
1213        platform_set_drvdata(pdev, NULL);
1214        kfree(data);
1215EXIT:
1216        return err;
1217}
1218
1219static int __devexit vt1211_remove(struct platform_device *pdev)
1220{
1221        struct vt1211_data *data = platform_get_drvdata(pdev);
1222        struct resource *res;
1223
1224        hwmon_device_unregister(data->hwmon_dev);
1225        vt1211_remove_sysfs(pdev);
1226        platform_set_drvdata(pdev, NULL);
1227        kfree(data);
1228
1229        res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1230        release_region(res->start, res->end - res->start + 1);
1231
1232        return 0;
1233}
1234
1235static struct platform_driver vt1211_driver = {
1236        .driver = {
1237                .owner = THIS_MODULE,
1238                .name  = DRVNAME,
1239        },
1240        .probe  = vt1211_probe,
1241        .remove = __devexit_p(vt1211_remove),
1242};
1243
1244static int __init vt1211_device_add(unsigned short address)
1245{
1246        struct resource res = {
1247                .start  = address,
1248                .end    = address + 0x7f,
1249                .flags  = IORESOURCE_IO,
1250        };
1251        int err;
1252
1253        pdev = platform_device_alloc(DRVNAME, address);
1254        if (!pdev) {
1255                err = -ENOMEM;
1256                printk(KERN_ERR DRVNAME ": Device allocation failed (%d)\n",
1257                       err);
1258                goto EXIT;
1259        }
1260
1261        res.name = pdev->name;
1262        err = platform_device_add_resources(pdev, &res, 1);
1263        if (err) {
1264                printk(KERN_ERR DRVNAME ": Device resource addition failed "
1265                       "(%d)\n", err);
1266                goto EXIT_DEV_PUT;
1267        }
1268
1269        err = platform_device_add(pdev);
1270        if (err) {
1271                printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
1272                       err);
1273                goto EXIT_DEV_PUT;
1274        }
1275
1276        return 0;
1277
1278EXIT_DEV_PUT:
1279        platform_device_put(pdev);
1280EXIT:
1281        return err;
1282}
1283
1284static int __init vt1211_find(int sio_cip, unsigned short *address)
1285{
1286        int err = -ENODEV;
1287        int devid;
1288
1289        superio_enter(sio_cip);
1290
1291        devid = force_id ? force_id : superio_inb(sio_cip, SIO_VT1211_DEVID);
1292        if (devid != SIO_VT1211_ID) {
1293                goto EXIT;
1294        }
1295
1296        superio_select(sio_cip, SIO_VT1211_LDN_HWMON);
1297
1298        if ((superio_inb(sio_cip, SIO_VT1211_ACTIVE) & 1) == 0) {
1299                printk(KERN_WARNING DRVNAME ": HW monitor is disabled, "
1300                       "skipping\n");
1301                goto EXIT;
1302        }
1303
1304        *address = ((superio_inb(sio_cip, SIO_VT1211_BADDR) << 8) |
1305                    (superio_inb(sio_cip, SIO_VT1211_BADDR + 1))) & 0xff00;
1306        if (*address == 0) {
1307                printk(KERN_WARNING DRVNAME ": Base address is not set, "
1308                       "skipping\n");
1309                goto EXIT;
1310        }
1311
1312        err = 0;
1313        printk(KERN_INFO DRVNAME ": Found VT1211 chip at 0x%04x, "
1314               "revision %u\n", *address,
1315               superio_inb(sio_cip, SIO_VT1211_DEVREV));
1316
1317EXIT:
1318        superio_exit(sio_cip);
1319        return err;
1320}
1321
1322static int __init vt1211_init(void)
1323{
1324        int err;
1325        unsigned short address = 0;
1326
1327        if ((err = vt1211_find(SIO_REG_CIP1, &address)) &&
1328            (err = vt1211_find(SIO_REG_CIP2, &address))) {
1329                goto EXIT;
1330        }
1331
1332        if ((uch_config < -1) || (uch_config > 31)) {
1333                err = -EINVAL;
1334                printk(KERN_WARNING DRVNAME ": Invalid UCH configuration %d. "
1335                       "Choose a value between 0 and 31.\n", uch_config);
1336          goto EXIT;
1337        }
1338
1339        if ((int_mode < -1) || (int_mode > 0)) {
1340                err = -EINVAL;
1341                printk(KERN_WARNING DRVNAME ": Invalid interrupt mode %d. "
1342                       "Only mode 0 is supported.\n", int_mode);
1343          goto EXIT;
1344        }
1345
1346        err = platform_driver_register(&vt1211_driver);
1347        if (err) {
1348                goto EXIT;
1349        }
1350
1351        /* Sets global pdev as a side effect */
1352        err = vt1211_device_add(address);
1353        if (err) {
1354                goto EXIT_DRV_UNREGISTER;
1355        }
1356
1357        return 0;
1358
1359EXIT_DRV_UNREGISTER:
1360        platform_driver_unregister(&vt1211_driver);
1361EXIT:
1362        return err;
1363}
1364
1365static void __exit vt1211_exit(void)
1366{
1367        platform_device_unregister(pdev);
1368        platform_driver_unregister(&vt1211_driver);
1369}
1370
1371MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>");
1372MODULE_DESCRIPTION("VT1211 sensors");
1373MODULE_LICENSE("GPL");
1374
1375module_init(vt1211_init);
1376module_exit(vt1211_exit);
1377
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