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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  25
  26#include <linux/module.h>
  27#include <linux/init.h>
  28#include <linux/slab.h>
  29#include <linux/jiffies.h>
  30#include <linux/platform_device.h>
  31#include <linux/hwmon.h>
  32#include <linux/hwmon-sysfs.h>
  33#include <linux/hwmon-vid.h>
  34#include <linux/err.h>
  35#include <linux/mutex.h>
  36#include <linux/ioport.h>
  37#include <linux/acpi.h>
  38#include <linux/io.h>
  39
  40static int uch_config = -1;
  41module_param(uch_config, int, 0);
  42MODULE_PARM_DESC(uch_config, "Initialize the universal channel configuration");
  43
  44static int int_mode = -1;
  45module_param(int_mode, int, 0);
  46MODULE_PARM_DESC(int_mode, "Force the temperature interrupt mode");
  47
  48static unsigned short force_id;
  49module_param(force_id, ushort, 0);
  50MODULE_PARM_DESC(force_id, "Override the detected device ID");
  51
  52static struct platform_device *pdev;
  53
  54#define DRVNAME "vt1211"
  55
  56/* ---------------------------------------------------------------------
  57 * Registers
  58 *
  59 * The sensors are defined as follows.
  60 *
  61 * Sensor          Voltage Mode   Temp Mode   Notes (from the datasheet)
  62 * --------        ------------   ---------   --------------------------
  63 * Reading 1                      temp1       Intel thermal diode
  64 * Reading 3                      temp2       Internal thermal diode
  65 * UCH1/Reading2   in0            temp3       NTC type thermistor
  66 * UCH2            in1            temp4       +2.5V
  67 * UCH3            in2            temp5       VccP
  68 * UCH4            in3            temp6       +5V
  69 * UCH5            in4            temp7       +12V
  70 * 3.3V            in5                        Internal VDD (+3.3V)
  71 *
  72 * --------------------------------------------------------------------- */
  73
  74/* Voltages (in) numbered 0-5 (ix) */
  75#define VT1211_REG_IN(ix)               (0x21 + (ix))
  76#define VT1211_REG_IN_MIN(ix)           ((ix) == 0 ? 0x3e : 0x2a + 2 * (ix))
  77#define VT1211_REG_IN_MAX(ix)           ((ix) == 0 ? 0x3d : 0x29 + 2 * (ix))
  78
  79/* Temperatures (temp) numbered 0-6 (ix) */
  80static u8 regtemp[]     = {0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25};
  81static u8 regtempmax[]  = {0x39, 0x1d, 0x3d, 0x2b, 0x2d, 0x2f, 0x31};
  82static u8 regtemphyst[] = {0x3a, 0x1e, 0x3e, 0x2c, 0x2e, 0x30, 0x32};
  83
  84/* Fans numbered 0-1 (ix) */
  85#define VT1211_REG_FAN(ix)              (0x29 + (ix))
  86#define VT1211_REG_FAN_MIN(ix)          (0x3b + (ix))
  87#define VT1211_REG_FAN_DIV               0x47
  88
  89/* PWMs numbered 0-1 (ix) */
  90/* Auto points numbered 0-3 (ap) */
  91#define VT1211_REG_PWM(ix)              (0x60 + (ix))
  92#define VT1211_REG_PWM_CLK               0x50
  93#define VT1211_REG_PWM_CTL               0x51
  94#define VT1211_REG_PWM_AUTO_TEMP(ap)    (0x55 - (ap))
  95#define VT1211_REG_PWM_AUTO_PWM(ix, ap) (0x58 + 2 * (ix) - (ap))
  96
  97/* Miscellaneous registers */
  98#define VT1211_REG_CONFIG               0x40
  99#define VT1211_REG_ALARM1               0x41
 100#define VT1211_REG_ALARM2               0x42
 101#define VT1211_REG_VID                  0x45
 102#define VT1211_REG_UCH_CONFIG           0x4a
 103#define VT1211_REG_TEMP1_CONFIG         0x4b
 104#define VT1211_REG_TEMP2_CONFIG         0x4c
 105
 106/* In, temp & fan alarm bits */
 107static const u8 bitalarmin[]    = {11, 0, 1, 3, 8, 2, 9};
 108static const u8 bitalarmtemp[]  = {4, 15, 11, 0, 1, 3, 8};
 109static const u8 bitalarmfan[]   = {6, 7};
 110
 111/* ---------------------------------------------------------------------
 112 * Data structures and manipulation thereof
 113 * --------------------------------------------------------------------- */
 114
 115struct vt1211_data {
 116        unsigned short addr;
 117        const char *name;
 118        struct device *hwmon_dev;
 119
 120        struct mutex update_lock;
 121        char valid;                     /* !=0 if following fields are valid */
 122        unsigned long last_updated;     /* In jiffies */
 123
 124        /* Register values */
 125        u8  in[6];
 126        u8  in_max[6];
 127        u8  in_min[6];
 128        u8  temp[7];
 129        u8  temp_max[7];
 130        u8  temp_hyst[7];
 131        u8  fan[2];
 132        u8  fan_min[2];
 133        u8  fan_div[2];
 134        u8  fan_ctl;
 135        u8  pwm[2];
 136        u8  pwm_ctl[2];
 137        u8  pwm_clk;
 138        u8  pwm_auto_temp[4];
 139        u8  pwm_auto_pwm[2][4];
 140        u8  vid;                /* Read once at init time */
 141        u8  vrm;
 142        u8  uch_config;         /* Read once at init time */
 143        u16 alarms;
 144};
 145
 146/* ix = [0-5] */
 147#define ISVOLT(ix, uch_config)  ((ix) > 4 ? 1 : \
 148                                 !(((uch_config) >> ((ix) + 2)) & 1))
 149
 150/* ix = [0-6] */
 151#define ISTEMP(ix, uch_config)  ((ix) < 2 ? 1 : \
 152                                 ((uch_config) >> (ix)) & 1)
 153
 154/*
 155 * in5 (ix = 5) is special. It's the internal 3.3V so it's scaled in the
 156 * driver according to the VT1211 BIOS porting guide
 157 */
 158#define IN_FROM_REG(ix, reg)    ((reg) < 3 ? 0 : (ix) == 5 ? \
 159                                 (((reg) - 3) * 15882 + 479) / 958 : \
 160                                 (((reg) - 3) * 10000 + 479) / 958)
 161#define IN_TO_REG(ix, val)      (SENSORS_LIMIT((ix) == 5 ? \
 162                                 ((val) * 958 + 7941) / 15882 + 3 : \
 163                                 ((val) * 958 + 5000) / 10000 + 3, 0, 255))
 164
 165/*
 166 * temp1 (ix = 0) is an intel thermal diode which is scaled in user space.
 167 * temp2 (ix = 1) is the internal temp diode so it's scaled in the driver
 168 * according to some measurements that I took on an EPIA M10000.
 169 * temp3-7 are thermistor based so the driver returns the voltage measured at
 170 * the pin (range 0V - 2.2V).
 171 */
 172#define TEMP_FROM_REG(ix, reg)  ((ix) == 0 ? (reg) * 1000 : \
 173                                 (ix) == 1 ? (reg) < 51 ? 0 : \
 174                                 ((reg) - 51) * 1000 : \
 175                                 ((253 - (reg)) * 2200 + 105) / 210)
 176#define TEMP_TO_REG(ix, val)    SENSORS_LIMIT( \
 177                                 ((ix) == 0 ? ((val) + 500) / 1000 : \
 178                                  (ix) == 1 ? ((val) + 500) / 1000 + 51 : \
 179                                  253 - ((val) * 210 + 1100) / 2200), 0, 255)
 180
 181#define DIV_FROM_REG(reg)       (1 << (reg))
 182
 183#define RPM_FROM_REG(reg, div)  (((reg) == 0) || ((reg) == 255) ? 0 : \
 184                                 1310720 / (reg) / DIV_FROM_REG(div))
 185#define RPM_TO_REG(val, div)    ((val) == 0 ? 255 : \
 186                                 SENSORS_LIMIT((1310720 / (val) / \
 187                                 DIV_FROM_REG(div)), 1, 254))
 188
 189/* ---------------------------------------------------------------------
 190 * Super-I/O constants and functions
 191 * --------------------------------------------------------------------- */
 192
 193/*
 194 * Configuration index port registers
 195 * The vt1211 can live at 2 different addresses so we need to probe both
 196 */
 197#define SIO_REG_CIP1            0x2e
 198#define SIO_REG_CIP2            0x4e
 199
 200/* Configuration registers */
 201#define SIO_VT1211_LDN          0x07    /* logical device number */
 202#define SIO_VT1211_DEVID        0x20    /* device ID */
 203#define SIO_VT1211_DEVREV       0x21    /* device revision */
 204#define SIO_VT1211_ACTIVE       0x30    /* HW monitor active */
 205#define SIO_VT1211_BADDR        0x60    /* base I/O address */
 206#define SIO_VT1211_ID           0x3c    /* VT1211 device ID */
 207
 208/* VT1211 logical device numbers */
 209#define SIO_VT1211_LDN_HWMON    0x0b    /* HW monitor */
 210
 211static inline void superio_outb(int sio_cip, int reg, int val)
 212{
 213        outb(reg, sio_cip);
 214        outb(val, sio_cip + 1);
 215}
 216
 217static inline int superio_inb(int sio_cip, int reg)
 218{
 219        outb(reg, sio_cip);
 220        return inb(sio_cip + 1);
 221}
 222
 223static inline void superio_select(int sio_cip, int ldn)
 224{
 225        outb(SIO_VT1211_LDN, sio_cip);
 226        outb(ldn, sio_cip + 1);
 227}
 228
 229static inline void superio_enter(int sio_cip)
 230{
 231        outb(0x87, sio_cip);
 232        outb(0x87, sio_cip);
 233}
 234
 235static inline void superio_exit(int sio_cip)
 236{
 237        outb(0xaa, sio_cip);
 238}
 239
 240/* ---------------------------------------------------------------------
 241 * Device I/O access
 242 * --------------------------------------------------------------------- */
 243
 244static inline u8 vt1211_read8(struct vt1211_data *data, u8 reg)
 245{
 246        return inb(data->addr + reg);
 247}
 248
 249static inline void vt1211_write8(struct vt1211_data *data, u8 reg, u8 val)
 250{
 251        outb(val, data->addr + reg);
 252}
 253
 254static struct vt1211_data *vt1211_update_device(struct device *dev)
 255{
 256        struct vt1211_data *data = dev_get_drvdata(dev);
 257        int ix, val;
 258
 259        mutex_lock(&data->update_lock);
 260
 261        /* registers cache is refreshed after 1 second */
 262        if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
 263                /* read VID */
 264                data->vid = vt1211_read8(data, VT1211_REG_VID) & 0x1f;
 265
 266                /* voltage (in) registers */
 267                for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
 268                        if (ISVOLT(ix, data->uch_config)) {
 269                                data->in[ix] = vt1211_read8(data,
 270                                                VT1211_REG_IN(ix));
 271                                data->in_min[ix] = vt1211_read8(data,
 272                                                VT1211_REG_IN_MIN(ix));
 273                                data->in_max[ix] = vt1211_read8(data,
 274                                                VT1211_REG_IN_MAX(ix));
 275                        }
 276                }
 277
 278                /* temp registers */
 279                for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) {
 280                        if (ISTEMP(ix, data->uch_config)) {
 281                                data->temp[ix] = vt1211_read8(data,
 282                                                regtemp[ix]);
 283                                data->temp_max[ix] = vt1211_read8(data,
 284                                                regtempmax[ix]);
 285                                data->temp_hyst[ix] = vt1211_read8(data,
 286                                                regtemphyst[ix]);
 287                        }
 288                }
 289
 290                /* fan & pwm registers */
 291                for (ix = 0; ix < ARRAY_SIZE(data->fan); ix++) {
 292                        data->fan[ix] = vt1211_read8(data,
 293                                                VT1211_REG_FAN(ix));
 294                        data->fan_min[ix] = vt1211_read8(data,
 295                                                VT1211_REG_FAN_MIN(ix));
 296                        data->pwm[ix] = vt1211_read8(data,
 297                                                VT1211_REG_PWM(ix));
 298                }
 299                val = vt1211_read8(data, VT1211_REG_FAN_DIV);
 300                data->fan_div[0] = (val >> 4) & 3;
 301                data->fan_div[1] = (val >> 6) & 3;
 302                data->fan_ctl = val & 0xf;
 303
 304                val = vt1211_read8(data, VT1211_REG_PWM_CTL);
 305                data->pwm_ctl[0] = val & 0xf;
 306                data->pwm_ctl[1] = (val >> 4) & 0xf;
 307
 308                data->pwm_clk = vt1211_read8(data, VT1211_REG_PWM_CLK);
 309
 310                /* pwm & temp auto point registers */
 311                data->pwm_auto_pwm[0][1] = vt1211_read8(data,
 312                                                VT1211_REG_PWM_AUTO_PWM(0, 1));
 313                data->pwm_auto_pwm[0][2] = vt1211_read8(data,
 314                                                VT1211_REG_PWM_AUTO_PWM(0, 2));
 315                data->pwm_auto_pwm[1][1] = vt1211_read8(data,
 316                                                VT1211_REG_PWM_AUTO_PWM(1, 1));
 317                data->pwm_auto_pwm[1][2] = vt1211_read8(data,
 318                                                VT1211_REG_PWM_AUTO_PWM(1, 2));
 319                for (ix = 0; ix < ARRAY_SIZE(data->pwm_auto_temp); ix++) {
 320                        data->pwm_auto_temp[ix] = vt1211_read8(data,
 321                                                VT1211_REG_PWM_AUTO_TEMP(ix));
 322                }
 323
 324                /* alarm registers */
 325                data->alarms = (vt1211_read8(data, VT1211_REG_ALARM2) << 8) |
 326                                vt1211_read8(data, VT1211_REG_ALARM1);
 327
 328                data->last_updated = jiffies;
 329                data->valid = 1;
 330        }
 331
 332        mutex_unlock(&data->update_lock);
 333
 334        return data;
 335}
 336
 337/* ---------------------------------------------------------------------
 338 * Voltage sysfs interfaces
 339 * ix = [0-5]
 340 * --------------------------------------------------------------------- */
 341
 342#define SHOW_IN_INPUT   0
 343#define SHOW_SET_IN_MIN 1
 344#define SHOW_SET_IN_MAX 2
 345#define SHOW_IN_ALARM   3
 346
 347static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 348                       char *buf)
 349{
 350        struct vt1211_data *data = vt1211_update_device(dev);
 351        struct sensor_device_attribute_2 *sensor_attr_2 =
 352                                                to_sensor_dev_attr_2(attr);
 353        int ix = sensor_attr_2->index;
 354        int fn = sensor_attr_2->nr;
 355        int res;
 356
 357        switch (fn) {
 358        case SHOW_IN_INPUT:
 359                res = IN_FROM_REG(ix, data->in[ix]);
 360                break;
 361        case SHOW_SET_IN_MIN:
 362                res = IN_FROM_REG(ix, data->in_min[ix]);
 363                break;
 364        case SHOW_SET_IN_MAX:
 365                res = IN_FROM_REG(ix, data->in_max[ix]);
 366                break;
 367        case SHOW_IN_ALARM:
 368                res = (data->alarms >> bitalarmin[ix]) & 1;
 369                break;
 370        default:
 371                res = 0;
 372                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 373        }
 374
 375        return sprintf(buf, "%d\n", res);
 376}
 377
 378static ssize_t set_in(struct device *dev, struct device_attribute *attr,
 379                      const char *buf, size_t count)
 380{
 381        struct vt1211_data *data = dev_get_drvdata(dev);
 382        struct sensor_device_attribute_2 *sensor_attr_2 =
 383                                                to_sensor_dev_attr_2(attr);
 384        int ix = sensor_attr_2->index;
 385        int fn = sensor_attr_2->nr;
 386        long val;
 387        int err;
 388
 389        err = kstrtol(buf, 10, &val);
 390        if (err)
 391                return err;
 392
 393        mutex_lock(&data->update_lock);
 394        switch (fn) {
 395        case SHOW_SET_IN_MIN:
 396                data->in_min[ix] = IN_TO_REG(ix, val);
 397                vt1211_write8(data, VT1211_REG_IN_MIN(ix), data->in_min[ix]);
 398                break;
 399        case SHOW_SET_IN_MAX:
 400                data->in_max[ix] = IN_TO_REG(ix, val);
 401                vt1211_write8(data, VT1211_REG_IN_MAX(ix), data->in_max[ix]);
 402                break;
 403        default:
 404                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 405        }
 406        mutex_unlock(&data->update_lock);
 407
 408        return count;
 409}
 410
 411/* ---------------------------------------------------------------------
 412 * Temperature sysfs interfaces
 413 * ix = [0-6]
 414 * --------------------------------------------------------------------- */
 415
 416#define SHOW_TEMP_INPUT         0
 417#define SHOW_SET_TEMP_MAX       1
 418#define SHOW_SET_TEMP_MAX_HYST  2
 419#define SHOW_TEMP_ALARM         3
 420
 421static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 422                         char *buf)
 423{
 424        struct vt1211_data *data = vt1211_update_device(dev);
 425        struct sensor_device_attribute_2 *sensor_attr_2 =
 426                                                to_sensor_dev_attr_2(attr);
 427        int ix = sensor_attr_2->index;
 428        int fn = sensor_attr_2->nr;
 429        int res;
 430
 431        switch (fn) {
 432        case SHOW_TEMP_INPUT:
 433                res = TEMP_FROM_REG(ix, data->temp[ix]);
 434                break;
 435        case SHOW_SET_TEMP_MAX:
 436                res = TEMP_FROM_REG(ix, data->temp_max[ix]);
 437                break;
 438        case SHOW_SET_TEMP_MAX_HYST:
 439                res = TEMP_FROM_REG(ix, data->temp_hyst[ix]);
 440                break;
 441        case SHOW_TEMP_ALARM:
 442                res = (data->alarms >> bitalarmtemp[ix]) & 1;
 443                break;
 444        default:
 445                res = 0;
 446                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 447        }
 448
 449        return sprintf(buf, "%d\n", res);
 450}
 451
 452static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
 453                        const char *buf, size_t count)
 454{
 455        struct vt1211_data *data = dev_get_drvdata(dev);
 456        struct sensor_device_attribute_2 *sensor_attr_2 =
 457                                                to_sensor_dev_attr_2(attr);
 458        int ix = sensor_attr_2->index;
 459        int fn = sensor_attr_2->nr;
 460        long val;
 461        int err;
 462
 463        err = kstrtol(buf, 10, &val);
 464        if (err)
 465                return err;
 466
 467        mutex_lock(&data->update_lock);
 468        switch (fn) {
 469        case SHOW_SET_TEMP_MAX:
 470                data->temp_max[ix] = TEMP_TO_REG(ix, val);
 471                vt1211_write8(data, regtempmax[ix],
 472                              data->temp_max[ix]);
 473                break;
 474        case SHOW_SET_TEMP_MAX_HYST:
 475                data->temp_hyst[ix] = TEMP_TO_REG(ix, val);
 476                vt1211_write8(data, regtemphyst[ix],
 477                              data->temp_hyst[ix]);
 478                break;
 479        default:
 480                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 481        }
 482        mutex_unlock(&data->update_lock);
 483
 484        return count;
 485}
 486
 487/* ---------------------------------------------------------------------
 488 * Fan sysfs interfaces
 489 * ix = [0-1]
 490 * --------------------------------------------------------------------- */
 491
 492#define SHOW_FAN_INPUT          0
 493#define SHOW_SET_FAN_MIN        1
 494#define SHOW_SET_FAN_DIV        2
 495#define SHOW_FAN_ALARM          3
 496
 497static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 498                        char *buf)
 499{
 500        struct vt1211_data *data = vt1211_update_device(dev);
 501        struct sensor_device_attribute_2 *sensor_attr_2 =
 502                                                to_sensor_dev_attr_2(attr);
 503        int ix = sensor_attr_2->index;
 504        int fn = sensor_attr_2->nr;
 505        int res;
 506
 507        switch (fn) {
 508        case SHOW_FAN_INPUT:
 509                res = RPM_FROM_REG(data->fan[ix], data->fan_div[ix]);
 510                break;
 511        case SHOW_SET_FAN_MIN:
 512                res = RPM_FROM_REG(data->fan_min[ix], data->fan_div[ix]);
 513                break;
 514        case SHOW_SET_FAN_DIV:
 515                res = DIV_FROM_REG(data->fan_div[ix]);
 516                break;
 517        case SHOW_FAN_ALARM:
 518                res = (data->alarms >> bitalarmfan[ix]) & 1;
 519                break;
 520        default:
 521                res = 0;
 522                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 523        }
 524
 525        return sprintf(buf, "%d\n", res);
 526}
 527
 528static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
 529                       const char *buf, size_t count)
 530{
 531        struct vt1211_data *data = dev_get_drvdata(dev);
 532        struct sensor_device_attribute_2 *sensor_attr_2 =
 533                                                to_sensor_dev_attr_2(attr);
 534        int ix = sensor_attr_2->index;
 535        int fn = sensor_attr_2->nr;
 536        int reg;
 537        unsigned long val;
 538        int err;
 539
 540        err = kstrtoul(buf, 10, &val);
 541        if (err)
 542                return err;
 543
 544        mutex_lock(&data->update_lock);
 545
 546        /* sync the data cache */
 547        reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
 548        data->fan_div[0] = (reg >> 4) & 3;
 549        data->fan_div[1] = (reg >> 6) & 3;
 550        data->fan_ctl = reg & 0xf;
 551
 552        switch (fn) {
 553        case SHOW_SET_FAN_MIN:
 554                data->fan_min[ix] = RPM_TO_REG(val, data->fan_div[ix]);
 555                vt1211_write8(data, VT1211_REG_FAN_MIN(ix),
 556                              data->fan_min[ix]);
 557                break;
 558        case SHOW_SET_FAN_DIV:
 559                switch (val) {
 560                case 1:
 561                        data->fan_div[ix] = 0;
 562                        break;
 563                case 2:
 564                        data->fan_div[ix] = 1;
 565                        break;
 566                case 4:
 567                        data->fan_div[ix] = 2;
 568                        break;
 569                case 8:
 570                        data->fan_div[ix] = 3;
 571                        break;
 572                default:
 573                        count = -EINVAL;
 574                        dev_warn(dev, "fan div value %ld not supported. "
 575                                 "Choose one of 1, 2, 4, or 8.\n", val);
 576                        goto EXIT;
 577                }
 578                vt1211_write8(data, VT1211_REG_FAN_DIV,
 579                              ((data->fan_div[1] << 6) |
 580                               (data->fan_div[0] << 4) |
 581                                data->fan_ctl));
 582                break;
 583        default:
 584                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 585        }
 586
 587EXIT:
 588        mutex_unlock(&data->update_lock);
 589        return count;
 590}
 591
 592/* ---------------------------------------------------------------------
 593 * PWM sysfs interfaces
 594 * ix = [0-1]
 595 * --------------------------------------------------------------------- */
 596
 597#define SHOW_PWM                        0
 598#define SHOW_SET_PWM_ENABLE             1
 599#define SHOW_SET_PWM_FREQ               2
 600#define SHOW_SET_PWM_AUTO_CHANNELS_TEMP 3
 601
 602static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 603                        char *buf)
 604{
 605        struct vt1211_data *data = vt1211_update_device(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        int res;
 611
 612        switch (fn) {
 613        case SHOW_PWM:
 614                res = data->pwm[ix];
 615                break;
 616        case SHOW_SET_PWM_ENABLE:
 617                res = ((data->pwm_ctl[ix] >> 3) & 1) ? 2 : 0;
 618                break;
 619        case SHOW_SET_PWM_FREQ:
 620                res = 90000 >> (data->pwm_clk & 7);
 621                break;
 622        case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
 623                res = (data->pwm_ctl[ix] & 7) + 1;
 624                break;
 625        default:
 626                res = 0;
 627                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 628        }
 629
 630        return sprintf(buf, "%d\n", res);
 631}
 632
 633static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 634                       const char *buf, size_t count)
 635{
 636        struct vt1211_data *data = dev_get_drvdata(dev);
 637        struct sensor_device_attribute_2 *sensor_attr_2 =
 638                                                to_sensor_dev_attr_2(attr);
 639        int ix = sensor_attr_2->index;
 640        int fn = sensor_attr_2->nr;
 641        int tmp, reg;
 642        unsigned long val;
 643        int err;
 644
 645        err = kstrtoul(buf, 10, &val);
 646        if (err)
 647                return err;
 648
 649        mutex_lock(&data->update_lock);
 650
 651        switch (fn) {
 652        case SHOW_SET_PWM_ENABLE:
 653                /* sync the data cache */
 654                reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
 655                data->fan_div[0] = (reg >> 4) & 3;
 656                data->fan_div[1] = (reg >> 6) & 3;
 657                data->fan_ctl = reg & 0xf;
 658                reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
 659                data->pwm_ctl[0] = reg & 0xf;
 660                data->pwm_ctl[1] = (reg >> 4) & 0xf;
 661                switch (val) {
 662                case 0:
 663                        data->pwm_ctl[ix] &= 7;
 664                        /*
 665                         * disable SmartGuardian if both PWM outputs are
 666                         * disabled
 667                         */
 668                        if ((data->pwm_ctl[ix ^ 1] & 1) == 0)
 669                                data->fan_ctl &= 0xe;
 670                        break;
 671                case 2:
 672                        data->pwm_ctl[ix] |= 8;
 673                        data->fan_ctl |= 1;
 674                        break;
 675                default:
 676                        count = -EINVAL;
 677                        dev_warn(dev, "pwm mode %ld not supported. "
 678                                 "Choose one of 0 or 2.\n", val);
 679                        goto EXIT;
 680                }
 681                vt1211_write8(data, VT1211_REG_PWM_CTL,
 682                              ((data->pwm_ctl[1] << 4) |
 683                                data->pwm_ctl[0]));
 684                vt1211_write8(data, VT1211_REG_FAN_DIV,
 685                              ((data->fan_div[1] << 6) |
 686                               (data->fan_div[0] << 4) |
 687                                data->fan_ctl));
 688                break;
 689        case SHOW_SET_PWM_FREQ:
 690                val = 135000 / SENSORS_LIMIT(val, 135000 >> 7, 135000);
 691                /* calculate tmp = log2(val) */
 692                tmp = 0;
 693                for (val >>= 1; val > 0; val >>= 1)
 694                        tmp++;
 695                /* sync the data cache */
 696                reg = vt1211_read8(data, VT1211_REG_PWM_CLK);
 697                data->pwm_clk = (reg & 0xf8) | tmp;
 698                vt1211_write8(data, VT1211_REG_PWM_CLK, data->pwm_clk);
 699                break;
 700        case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
 701                if (val < 1 || val > 7) {
 702                        count = -EINVAL;
 703                        dev_warn(dev, "temp channel %ld not supported. "
 704                                 "Choose a value between 1 and 7.\n", val);
 705                        goto EXIT;
 706                }
 707                if (!ISTEMP(val - 1, data->uch_config)) {
 708                        count = -EINVAL;
 709                        dev_warn(dev, "temp channel %ld is not available.\n",
 710                                 val);
 711                        goto EXIT;
 712                }
 713                /* sync the data cache */
 714                reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
 715                data->pwm_ctl[0] = reg & 0xf;
 716                data->pwm_ctl[1] = (reg >> 4) & 0xf;
 717                data->pwm_ctl[ix] = (data->pwm_ctl[ix] & 8) | (val - 1);
 718                vt1211_write8(data, VT1211_REG_PWM_CTL,
 719                              ((data->pwm_ctl[1] << 4) | data->pwm_ctl[0]));
 720                break;
 721        default:
 722                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 723        }
 724
 725EXIT:
 726        mutex_unlock(&data->update_lock);
 727        return count;
 728}
 729
 730/* ---------------------------------------------------------------------
 731 * PWM auto point definitions
 732 * ix = [0-1]
 733 * ap = [0-3]
 734 * --------------------------------------------------------------------- */
 735
 736/*
 737 * pwm[ix+1]_auto_point[ap+1]_temp mapping table:
 738 * Note that there is only a single set of temp auto points that controls both
 739 * PWM controllers. We still create 2 sets of sysfs files to make it look
 740 * more consistent even though they map to the same registers.
 741 *
 742 * ix ap : description
 743 * -------------------
 744 * 0  0  : pwm1/2 off temperature        (pwm_auto_temp[0])
 745 * 0  1  : pwm1/2 low speed temperature  (pwm_auto_temp[1])
 746 * 0  2  : pwm1/2 high speed temperature (pwm_auto_temp[2])
 747 * 0  3  : pwm1/2 full speed temperature (pwm_auto_temp[3])
 748 * 1  0  : pwm1/2 off temperature        (pwm_auto_temp[0])
 749 * 1  1  : pwm1/2 low speed temperature  (pwm_auto_temp[1])
 750 * 1  2  : pwm1/2 high speed temperature (pwm_auto_temp[2])
 751 * 1  3  : pwm1/2 full speed temperature (pwm_auto_temp[3])
 752 */
 753
 754static ssize_t show_pwm_auto_point_temp(struct device *dev,
 755                                        struct device_attribute *attr,
 756                                        char *buf)
 757{
 758        struct vt1211_data *data = vt1211_update_device(dev);
 759        struct sensor_device_attribute_2 *sensor_attr_2 =
 760                                                to_sensor_dev_attr_2(attr);
 761        int ix = sensor_attr_2->index;
 762        int ap = sensor_attr_2->nr;
 763
 764        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->pwm_ctl[ix] & 7,
 765                       data->pwm_auto_temp[ap]));
 766}
 767
 768static ssize_t set_pwm_auto_point_temp(struct device *dev,
 769                                       struct device_attribute *attr,
 770                                       const char *buf, size_t count)
 771{
 772        struct vt1211_data *data = dev_get_drvdata(dev);
 773        struct sensor_device_attribute_2 *sensor_attr_2 =
 774                                                to_sensor_dev_attr_2(attr);
 775        int ix = sensor_attr_2->index;
 776        int ap = sensor_attr_2->nr;
 777        int reg;
 778        long val;
 779        int err;
 780
 781        err = kstrtol(buf, 10, &val);
 782        if (err)
 783                return err;
 784
 785
 786        mutex_lock(&data->update_lock);
 787
 788        /* sync the data cache */
 789        reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
 790        data->pwm_ctl[0] = reg & 0xf;
 791        data->pwm_ctl[1] = (reg >> 4) & 0xf;
 792
 793        data->pwm_auto_temp[ap] = TEMP_TO_REG(data->pwm_ctl[ix] & 7, val);
 794        vt1211_write8(data, VT1211_REG_PWM_AUTO_TEMP(ap),
 795                      data->pwm_auto_temp[ap]);
 796        mutex_unlock(&data->update_lock);
 797
 798        return count;
 799}
 800
 801/*
 802 * pwm[ix+1]_auto_point[ap+1]_pwm mapping table:
 803 * Note that the PWM auto points 0 & 3 are hard-wired in the VT1211 and can't
 804 * be changed.
 805 *
 806 * ix ap : description
 807 * -------------------
 808 * 0  0  : pwm1 off                   (pwm_auto_pwm[0][0], hard-wired to 0)
 809 * 0  1  : pwm1 low speed duty cycle  (pwm_auto_pwm[0][1])
 810 * 0  2  : pwm1 high speed duty cycle (pwm_auto_pwm[0][2])
 811 * 0  3  : pwm1 full speed            (pwm_auto_pwm[0][3], hard-wired to 255)
 812 * 1  0  : pwm2 off                   (pwm_auto_pwm[1][0], hard-wired to 0)
 813 * 1  1  : pwm2 low speed duty cycle  (pwm_auto_pwm[1][1])
 814 * 1  2  : pwm2 high speed duty cycle (pwm_auto_pwm[1][2])
 815 * 1  3  : pwm2 full speed            (pwm_auto_pwm[1][3], hard-wired to 255)
 816 */
 817
 818static ssize_t show_pwm_auto_point_pwm(struct device *dev,
 819                                       struct device_attribute *attr,
 820                                       char *buf)
 821{
 822        struct vt1211_data *data = vt1211_update_device(dev);
 823        struct sensor_device_attribute_2 *sensor_attr_2 =
 824                                                to_sensor_dev_attr_2(attr);
 825        int ix = sensor_attr_2->index;
 826        int ap = sensor_attr_2->nr;
 827
 828        return sprintf(buf, "%d\n", data->pwm_auto_pwm[ix][ap]);
 829}
 830
 831static ssize_t set_pwm_auto_point_pwm(struct device *dev,
 832                                      struct device_attribute *attr,
 833                                      const char *buf, size_t count)
 834{
 835        struct vt1211_data *data = dev_get_drvdata(dev);
 836        struct sensor_device_attribute_2 *sensor_attr_2 =
 837                                                to_sensor_dev_attr_2(attr);
 838        int ix = sensor_attr_2->index;
 839        int ap = sensor_attr_2->nr;
 840        unsigned long val;
 841        int err;
 842
 843        err = kstrtoul(buf, 10, &val);
 844        if (err)
 845                return err;
 846
 847        mutex_lock(&data->update_lock);
 848        data->pwm_auto_pwm[ix][ap] = SENSORS_LIMIT(val, 0, 255);
 849        vt1211_write8(data, VT1211_REG_PWM_AUTO_PWM(ix, ap),
 850                      data->pwm_auto_pwm[ix][ap]);
 851        mutex_unlock(&data->update_lock);
 852
 853        return count;
 854}
 855
 856/* ---------------------------------------------------------------------
 857 * Miscellaneous sysfs interfaces (VRM, VID, name, and (legacy) alarms)
 858 * --------------------------------------------------------------------- */
 859
 860static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
 861                        char *buf)
 862{
 863        struct vt1211_data *data = dev_get_drvdata(dev);
 864
 865        return sprintf(buf, "%d\n", data->vrm);
 866}
 867
 868static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
 869                       const char *buf, size_t count)
 870{
 871        struct vt1211_data *data = dev_get_drvdata(dev);
 872        unsigned long val;
 873        int err;
 874
 875        err = kstrtoul(buf, 10, &val);
 876        if (err)
 877                return err;
 878
 879        data->vrm = val;
 880
 881        return count;
 882}
 883
 884static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
 885                        char *buf)
 886{
 887        struct vt1211_data *data = dev_get_drvdata(dev);
 888
 889        return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
 890}
 891
 892static ssize_t show_name(struct device *dev,
 893                         struct device_attribute *attr, char *buf)
 894{
 895        struct vt1211_data *data = dev_get_drvdata(dev);
 896
 897        return sprintf(buf, "%s\n", data->name);
 898}
 899
 900static ssize_t show_alarms(struct device *dev,
 901                           struct device_attribute *attr, char *buf)
 902{
 903        struct vt1211_data *data = vt1211_update_device(dev);
 904
 905        return sprintf(buf, "%d\n", data->alarms);
 906}
 907
 908/* ---------------------------------------------------------------------
 909 * Device attribute structs
 910 * --------------------------------------------------------------------- */
 911
 912#define SENSOR_ATTR_IN(ix) \
 913{       SENSOR_ATTR_2(in##ix##_input, S_IRUGO, \
 914                show_in, NULL, SHOW_IN_INPUT, ix), \
 915        SENSOR_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \
 916                show_in, set_in, SHOW_SET_IN_MIN, ix), \
 917        SENSOR_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \
 918                show_in, set_in, SHOW_SET_IN_MAX, ix), \
 919        SENSOR_ATTR_2(in##ix##_alarm, S_IRUGO, \
 920                show_in, NULL, SHOW_IN_ALARM, ix) \
 921}
 922
 923static struct sensor_device_attribute_2 vt1211_sysfs_in[][4] = {
 924        SENSOR_ATTR_IN(0),
 925        SENSOR_ATTR_IN(1),
 926        SENSOR_ATTR_IN(2),
 927        SENSOR_ATTR_IN(3),
 928        SENSOR_ATTR_IN(4),
 929        SENSOR_ATTR_IN(5)
 930};
 931
 932#define IN_UNIT_ATTRS(X)                        \
 933{       &vt1211_sysfs_in[X][0].dev_attr.attr,   \
 934        &vt1211_sysfs_in[X][1].dev_attr.attr,   \
 935        &vt1211_sysfs_in[X][2].dev_attr.attr,   \
 936        &vt1211_sysfs_in[X][3].dev_attr.attr,   \
 937        NULL                                    \
 938}
 939
 940static struct attribute *vt1211_in_attr[][5] = {
 941        IN_UNIT_ATTRS(0),
 942        IN_UNIT_ATTRS(1),
 943        IN_UNIT_ATTRS(2),
 944        IN_UNIT_ATTRS(3),
 945        IN_UNIT_ATTRS(4),
 946        IN_UNIT_ATTRS(5)
 947};
 948
 949static const struct attribute_group vt1211_in_attr_group[] = {
 950        { .attrs = vt1211_in_attr[0] },
 951        { .attrs = vt1211_in_attr[1] },
 952        { .attrs = vt1211_in_attr[2] },
 953        { .attrs = vt1211_in_attr[3] },
 954        { .attrs = vt1211_in_attr[4] },
 955        { .attrs = vt1211_in_attr[5] }
 956};
 957
 958#define SENSOR_ATTR_TEMP(ix) \
 959{       SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \
 960                show_temp, NULL, SHOW_TEMP_INPUT, ix-1), \
 961        SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
 962                show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1), \
 963        SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \
 964                show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1), \
 965        SENSOR_ATTR_2(temp##ix##_alarm, S_IRUGO, \
 966                show_temp, NULL, SHOW_TEMP_ALARM, ix-1) \
 967}
 968
 969static struct sensor_device_attribute_2 vt1211_sysfs_temp[][4] = {
 970        SENSOR_ATTR_TEMP(1),
 971        SENSOR_ATTR_TEMP(2),
 972        SENSOR_ATTR_TEMP(3),
 973        SENSOR_ATTR_TEMP(4),
 974        SENSOR_ATTR_TEMP(5),
 975        SENSOR_ATTR_TEMP(6),
 976        SENSOR_ATTR_TEMP(7),
 977};
 978
 979#define TEMP_UNIT_ATTRS(X)                      \
 980{       &vt1211_sysfs_temp[X][0].dev_attr.attr, \
 981        &vt1211_sysfs_temp[X][1].dev_attr.attr, \
 982        &vt1211_sysfs_temp[X][2].dev_attr.attr, \
 983        &vt1211_sysfs_temp[X][3].dev_attr.attr, \
 984        NULL                                    \
 985}
 986
 987static struct attribute *vt1211_temp_attr[][5] = {
 988        TEMP_UNIT_ATTRS(0),
 989        TEMP_UNIT_ATTRS(1),
 990        TEMP_UNIT_ATTRS(2),
 991        TEMP_UNIT_ATTRS(3),
 992        TEMP_UNIT_ATTRS(4),
 993        TEMP_UNIT_ATTRS(5),
 994        TEMP_UNIT_ATTRS(6)
 995};
 996
 997static const struct attribute_group vt1211_temp_attr_group[] = {
 998        { .attrs = vt1211_temp_attr[0] },
 999        { .attrs = vt1211_temp_attr[1] },
1000        { .attrs = vt1211_temp_attr[2] },
1001        { .attrs = vt1211_temp_attr[3] },
1002        { .attrs = vt1211_temp_attr[4] },
1003        { .attrs = vt1211_temp_attr[5] },
1004        { .attrs = vt1211_temp_attr[6] }
1005};
1006
1007#define SENSOR_ATTR_FAN(ix) \
1008        SENSOR_ATTR_2(fan##ix##_input, S_IRUGO, \
1009                show_fan, NULL, SHOW_FAN_INPUT, ix-1), \
1010        SENSOR_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
1011                show_fan, set_fan, SHOW_SET_FAN_MIN, ix-1), \
1012        SENSOR_ATTR_2(fan##ix##_div, S_IRUGO | S_IWUSR, \
1013                show_fan, set_fan, SHOW_SET_FAN_DIV, ix-1), \
1014        SENSOR_ATTR_2(fan##ix##_alarm, S_IRUGO, \
1015                show_fan, NULL, SHOW_FAN_ALARM, ix-1)
1016
1017#define SENSOR_ATTR_PWM(ix) \
1018        SENSOR_ATTR_2(pwm##ix, S_IRUGO, \
1019                show_pwm, NULL, SHOW_PWM, ix-1), \
1020        SENSOR_ATTR_2(pwm##ix##_enable, S_IRUGO | S_IWUSR, \
1021                show_pwm, set_pwm, SHOW_SET_PWM_ENABLE, ix-1), \
1022        SENSOR_ATTR_2(pwm##ix##_auto_channels_temp, S_IRUGO | S_IWUSR, \
1023                show_pwm, set_pwm, SHOW_SET_PWM_AUTO_CHANNELS_TEMP, ix-1)
1024
1025#define SENSOR_ATTR_PWM_FREQ(ix) \
1026        SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \
1027                show_pwm, set_pwm, SHOW_SET_PWM_FREQ, ix-1)
1028
1029#define SENSOR_ATTR_PWM_FREQ_RO(ix) \
1030        SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO, \
1031                show_pwm, NULL, SHOW_SET_PWM_FREQ, ix-1)
1032
1033#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) \
1034        SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO | S_IWUSR, \
1035                show_pwm_auto_point_temp, set_pwm_auto_point_temp, \
1036                ap-1, ix-1)
1037
1038#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) \
1039        SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO, \
1040                show_pwm_auto_point_temp, NULL, \
1041                ap-1, ix-1)
1042
1043#define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) \
1044        SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO | S_IWUSR, \
1045                show_pwm_auto_point_pwm, set_pwm_auto_point_pwm, \
1046                ap-1, ix-1)
1047
1048#define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) \
1049        SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO, \
1050                show_pwm_auto_point_pwm, NULL, \
1051                ap-1, ix-1)
1052
1053static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = {
1054        SENSOR_ATTR_FAN(1),
1055        SENSOR_ATTR_FAN(2),
1056        SENSOR_ATTR_PWM(1),
1057        SENSOR_ATTR_PWM(2),
1058        SENSOR_ATTR_PWM_FREQ(1),
1059        SENSOR_ATTR_PWM_FREQ_RO(2),
1060        SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 1),
1061        SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 2),
1062        SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 3),
1063        SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 4),
1064        SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 1),
1065        SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 2),
1066        SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 3),
1067        SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 4),
1068        SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 1),
1069        SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 2),
1070        SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 3),
1071        SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 4),
1072        SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 1),
1073        SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 2),
1074        SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 3),
1075        SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 4),
1076};
1077
1078static struct device_attribute vt1211_sysfs_misc[] = {
1079        __ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm),
1080        __ATTR(cpu0_vid, S_IRUGO, show_vid, NULL),
1081        __ATTR(name, S_IRUGO, show_name, NULL),
1082        __ATTR(alarms, S_IRUGO, show_alarms, NULL),
1083};
1084
1085/* ---------------------------------------------------------------------
1086 * Device registration and initialization
1087 * --------------------------------------------------------------------- */
1088
1089static void vt1211_init_device(struct vt1211_data *data)
1090{
1091        /* set VRM */
1092        data->vrm = vid_which_vrm();
1093
1094        /* Read (and initialize) UCH config */
1095        data->uch_config = vt1211_read8(data, VT1211_REG_UCH_CONFIG);
1096        if (uch_config > -1) {
1097                data->uch_config = (data->uch_config & 0x83) |
1098                                   (uch_config << 2);
1099                vt1211_write8(data, VT1211_REG_UCH_CONFIG, data->uch_config);
1100        }
1101
1102        /*
1103         * Initialize the interrupt mode (if request at module load time).
1104         * The VT1211 implements 3 different modes for clearing interrupts:
1105         * 0: Clear INT when status register is read. Regenerate INT as long
1106         *    as temp stays above hysteresis limit.
1107         * 1: Clear INT when status register is read. DON'T regenerate INT
1108         *    until temp falls below hysteresis limit and exceeds hot limit
1109         *    again.
1110         * 2: Clear INT when temp falls below max limit.
1111         *
1112         * The driver only allows to force mode 0 since that's the only one
1113         * that makes sense for 'sensors'
1114         */
1115        if (int_mode == 0) {
1116                vt1211_write8(data, VT1211_REG_TEMP1_CONFIG, 0);
1117                vt1211_write8(data, VT1211_REG_TEMP2_CONFIG, 0);
1118        }
1119
1120        /* Fill in some hard wired values into our data struct */
1121        data->pwm_auto_pwm[0][3] = 255;
1122        data->pwm_auto_pwm[1][3] = 255;
1123}
1124
1125static void vt1211_remove_sysfs(struct platform_device *pdev)
1126{
1127        struct device *dev = &pdev->dev;
1128        int i;
1129
1130        for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++)
1131                sysfs_remove_group(&dev->kobj, &vt1211_in_attr_group[i]);
1132
1133        for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++)
1134                sysfs_remove_group(&dev->kobj, &vt1211_temp_attr_group[i]);
1135
1136        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1137                device_remove_file(dev,
1138                        &vt1211_sysfs_fan_pwm[i].dev_attr);
1139        }
1140        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++)
1141                device_remove_file(dev, &vt1211_sysfs_misc[i]);
1142}
1143
1144static int vt1211_probe(struct platform_device *pdev)
1145{
1146        struct device *dev = &pdev->dev;
1147        struct vt1211_data *data;
1148        struct resource *res;
1149        int i, err;
1150
1151        data = devm_kzalloc(dev, sizeof(struct vt1211_data), GFP_KERNEL);
1152        if (!data) {
1153                dev_err(dev, "Out of memory\n");
1154                return -ENOMEM;
1155        }
1156
1157        res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1158        if (!devm_request_region(dev, res->start, resource_size(res),
1159                                 DRVNAME)) {
1160                dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1161                        (unsigned long)res->start, (unsigned long)res->end);
1162                return -EBUSY;
1163        }
1164        data->addr = res->start;
1165        data->name = DRVNAME;
1166        mutex_init(&data->update_lock);
1167
1168        platform_set_drvdata(pdev, data);
1169
1170        /* Initialize the VT1211 chip */
1171        vt1211_init_device(data);
1172
1173        /* Create sysfs interface files */
1174        for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++) {
1175                if (ISVOLT(i, data->uch_config)) {
1176                        err = sysfs_create_group(&dev->kobj,
1177                                                 &vt1211_in_attr_group[i]);
1178                        if (err)
1179                                goto EXIT_DEV_REMOVE;
1180                }
1181        }
1182        for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++) {
1183                if (ISTEMP(i, data->uch_config)) {
1184                        err = sysfs_create_group(&dev->kobj,
1185                                                 &vt1211_temp_attr_group[i]);
1186                        if (err)
1187                                goto EXIT_DEV_REMOVE;
1188                }
1189        }
1190        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1191                err = device_create_file(dev,
1192                        &vt1211_sysfs_fan_pwm[i].dev_attr);
1193                if (err)
1194                        goto EXIT_DEV_REMOVE;
1195        }
1196        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
1197                err = device_create_file(dev,
1198                       &vt1211_sysfs_misc[i]);
1199                if (err)
1200                        goto EXIT_DEV_REMOVE;
1201        }
1202
1203        /* Register device */
1204        data->hwmon_dev = hwmon_device_register(dev);
1205        if (IS_ERR(data->hwmon_dev)) {
1206                err = PTR_ERR(data->hwmon_dev);
1207                dev_err(dev, "Class registration failed (%d)\n", err);
1208                goto EXIT_DEV_REMOVE_SILENT;
1209        }
1210
1211        return 0;
1212
1213EXIT_DEV_REMOVE:
1214        dev_err(dev, "Sysfs interface creation failed (%d)\n", err);
1215EXIT_DEV_REMOVE_SILENT:
1216        vt1211_remove_sysfs(pdev);
1217        return err;
1218}
1219
1220static int vt1211_remove(struct platform_device *pdev)
1221{
1222        struct vt1211_data *data = platform_get_drvdata(pdev);
1223
1224        hwmon_device_unregister(data->hwmon_dev);
1225        vt1211_remove_sysfs(pdev);
1226
1227        return 0;
1228}
1229
1230static struct platform_driver vt1211_driver = {
1231        .driver = {
1232                .owner = THIS_MODULE,
1233                .name  = DRVNAME,
1234        },
1235        .probe  = vt1211_probe,
1236        .remove = vt1211_remove,
1237};
1238
1239static int __init vt1211_device_add(unsigned short address)
1240{
1241        struct resource res = {
1242                .start  = address,
1243                .end    = address + 0x7f,
1244                .flags  = IORESOURCE_IO,
1245        };
1246        int err;
1247
1248        pdev = platform_device_alloc(DRVNAME, address);
1249        if (!pdev) {
1250                err = -ENOMEM;
1251                pr_err("Device allocation failed (%d)\n", err);
1252                goto EXIT;
1253        }
1254
1255        res.name = pdev->name;
1256        err = acpi_check_resource_conflict(&res);
1257        if (err)
1258                goto EXIT_DEV_PUT;
1259
1260        err = platform_device_add_resources(pdev, &res, 1);
1261        if (err) {
1262                pr_err("Device resource addition failed (%d)\n", err);
1263                goto EXIT_DEV_PUT;
1264        }
1265
1266        err = platform_device_add(pdev);
1267        if (err) {
1268                pr_err("Device addition failed (%d)\n", err);
1269                goto EXIT_DEV_PUT;
1270        }
1271
1272        return 0;
1273
1274EXIT_DEV_PUT:
1275        platform_device_put(pdev);
1276EXIT:
1277        return err;
1278}
1279
1280static int __init vt1211_find(int sio_cip, unsigned short *address)
1281{
1282        int err = -ENODEV;
1283        int devid;
1284
1285        superio_enter(sio_cip);
1286
1287        devid = force_id ? force_id : superio_inb(sio_cip, SIO_VT1211_DEVID);
1288        if (devid != SIO_VT1211_ID)
1289                goto EXIT;
1290
1291        superio_select(sio_cip, SIO_VT1211_LDN_HWMON);
1292
1293        if ((superio_inb(sio_cip, SIO_VT1211_ACTIVE) & 1) == 0) {
1294                pr_warn("HW monitor is disabled, skipping\n");
1295                goto EXIT;
1296        }
1297
1298        *address = ((superio_inb(sio_cip, SIO_VT1211_BADDR) << 8) |
1299                    (superio_inb(sio_cip, SIO_VT1211_BADDR + 1))) & 0xff00;
1300        if (*address == 0) {
1301                pr_warn("Base address is not set, skipping\n");
1302                goto EXIT;
1303        }
1304
1305        err = 0;
1306        pr_info("Found VT1211 chip at 0x%04x, revision %u\n",
1307                *address, superio_inb(sio_cip, SIO_VT1211_DEVREV));
1308
1309EXIT:
1310        superio_exit(sio_cip);
1311        return err;
1312}
1313
1314static int __init vt1211_init(void)
1315{
1316        int err;
1317        unsigned short address = 0;
1318
1319        err = vt1211_find(SIO_REG_CIP1, &address);
1320        if (err) {
1321                err = vt1211_find(SIO_REG_CIP2, &address);
1322                if (err)
1323                        goto EXIT;
1324        }
1325
1326        if ((uch_config < -1) || (uch_config > 31)) {
1327                err = -EINVAL;
1328                pr_warn("Invalid UCH configuration %d. "
1329                        "Choose a value between 0 and 31.\n", uch_config);
1330                goto EXIT;
1331        }
1332
1333        if ((int_mode < -1) || (int_mode > 0)) {
1334                err = -EINVAL;
1335                pr_warn("Invalid interrupt mode %d. "
1336                        "Only mode 0 is supported.\n", int_mode);
1337                goto EXIT;
1338        }
1339
1340        err = platform_driver_register(&vt1211_driver);
1341        if (err)
1342                goto EXIT;
1343
1344        /* Sets global pdev as a side effect */
1345        err = vt1211_device_add(address);
1346        if (err)
1347                goto EXIT_DRV_UNREGISTER;
1348
1349        return 0;
1350
1351EXIT_DRV_UNREGISTER:
1352        platform_driver_unregister(&vt1211_driver);
1353EXIT:
1354        return err;
1355}
1356
1357static void __exit vt1211_exit(void)
1358{
1359        platform_device_unregister(pdev);
1360        platform_driver_unregister(&vt1211_driver);
1361}
1362
1363MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>");
1364MODULE_DESCRIPTION("VT1211 sensors");
1365MODULE_LICENSE("GPL");
1366
1367module_init(vt1211_init);
1368module_exit(vt1211_exit);
1369
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