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)      (clamp_val((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)    clamp_val( \
 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                                 clamp_val((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,
 575                                 "fan div value %ld not supported. Choose one of 1, 2, 4, or 8.\n",
 576                                 val);
 577                        goto EXIT;
 578                }
 579                vt1211_write8(data, VT1211_REG_FAN_DIV,
 580                              ((data->fan_div[1] << 6) |
 581                               (data->fan_div[0] << 4) |
 582                                data->fan_ctl));
 583                break;
 584        default:
 585                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 586        }
 587
 588EXIT:
 589        mutex_unlock(&data->update_lock);
 590        return count;
 591}
 592
 593/* ---------------------------------------------------------------------
 594 * PWM sysfs interfaces
 595 * ix = [0-1]
 596 * --------------------------------------------------------------------- */
 597
 598#define SHOW_PWM                        0
 599#define SHOW_SET_PWM_ENABLE             1
 600#define SHOW_SET_PWM_FREQ               2
 601#define SHOW_SET_PWM_AUTO_CHANNELS_TEMP 3
 602
 603static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 604                        char *buf)
 605{
 606        struct vt1211_data *data = vt1211_update_device(dev);
 607        struct sensor_device_attribute_2 *sensor_attr_2 =
 608                                                to_sensor_dev_attr_2(attr);
 609        int ix = sensor_attr_2->index;
 610        int fn = sensor_attr_2->nr;
 611        int res;
 612
 613        switch (fn) {
 614        case SHOW_PWM:
 615                res = data->pwm[ix];
 616                break;
 617        case SHOW_SET_PWM_ENABLE:
 618                res = ((data->pwm_ctl[ix] >> 3) & 1) ? 2 : 0;
 619                break;
 620        case SHOW_SET_PWM_FREQ:
 621                res = 90000 >> (data->pwm_clk & 7);
 622                break;
 623        case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
 624                res = (data->pwm_ctl[ix] & 7) + 1;
 625                break;
 626        default:
 627                res = 0;
 628                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 629        }
 630
 631        return sprintf(buf, "%d\n", res);
 632}
 633
 634static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 635                       const char *buf, size_t count)
 636{
 637        struct vt1211_data *data = dev_get_drvdata(dev);
 638        struct sensor_device_attribute_2 *sensor_attr_2 =
 639                                                to_sensor_dev_attr_2(attr);
 640        int ix = sensor_attr_2->index;
 641        int fn = sensor_attr_2->nr;
 642        int tmp, reg;
 643        unsigned long val;
 644        int err;
 645
 646        err = kstrtoul(buf, 10, &val);
 647        if (err)
 648                return err;
 649
 650        mutex_lock(&data->update_lock);
 651
 652        switch (fn) {
 653        case SHOW_SET_PWM_ENABLE:
 654                /* sync the data cache */
 655                reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
 656                data->fan_div[0] = (reg >> 4) & 3;
 657                data->fan_div[1] = (reg >> 6) & 3;
 658                data->fan_ctl = reg & 0xf;
 659                reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
 660                data->pwm_ctl[0] = reg & 0xf;
 661                data->pwm_ctl[1] = (reg >> 4) & 0xf;
 662                switch (val) {
 663                case 0:
 664                        data->pwm_ctl[ix] &= 7;
 665                        /*
 666                         * disable SmartGuardian if both PWM outputs are
 667                         * disabled
 668                         */
 669                        if ((data->pwm_ctl[ix ^ 1] & 1) == 0)
 670                                data->fan_ctl &= 0xe;
 671                        break;
 672                case 2:
 673                        data->pwm_ctl[ix] |= 8;
 674                        data->fan_ctl |= 1;
 675                        break;
 676                default:
 677                        count = -EINVAL;
 678                        dev_warn(dev,
 679                                 "pwm mode %ld not supported. Choose one of 0 or 2.\n",
 680                                 val);
 681                        goto EXIT;
 682                }
 683                vt1211_write8(data, VT1211_REG_PWM_CTL,
 684                              ((data->pwm_ctl[1] << 4) |
 685                                data->pwm_ctl[0]));
 686                vt1211_write8(data, VT1211_REG_FAN_DIV,
 687                              ((data->fan_div[1] << 6) |
 688                               (data->fan_div[0] << 4) |
 689                                data->fan_ctl));
 690                break;
 691        case SHOW_SET_PWM_FREQ:
 692                val = 135000 / clamp_val(val, 135000 >> 7, 135000);
 693                /* calculate tmp = log2(val) */
 694                tmp = 0;
 695                for (val >>= 1; val > 0; val >>= 1)
 696                        tmp++;
 697                /* sync the data cache */
 698                reg = vt1211_read8(data, VT1211_REG_PWM_CLK);
 699                data->pwm_clk = (reg & 0xf8) | tmp;
 700                vt1211_write8(data, VT1211_REG_PWM_CLK, data->pwm_clk);
 701                break;
 702        case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
 703                if (val < 1 || val > 7) {
 704                        count = -EINVAL;
 705                        dev_warn(dev,
 706                                 "temp channel %ld not supported. Choose a value between 1 and 7.\n",
 707                                 val);
 708                        goto EXIT;
 709                }
 710                if (!ISTEMP(val - 1, data->uch_config)) {
 711                        count = -EINVAL;
 712                        dev_warn(dev, "temp channel %ld is not available.\n",
 713                                 val);
 714                        goto EXIT;
 715                }
 716                /* sync the data cache */
 717                reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
 718                data->pwm_ctl[0] = reg & 0xf;
 719                data->pwm_ctl[1] = (reg >> 4) & 0xf;
 720                data->pwm_ctl[ix] = (data->pwm_ctl[ix] & 8) | (val - 1);
 721                vt1211_write8(data, VT1211_REG_PWM_CTL,
 722                              ((data->pwm_ctl[1] << 4) | data->pwm_ctl[0]));
 723                break;
 724        default:
 725                dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
 726        }
 727
 728EXIT:
 729        mutex_unlock(&data->update_lock);
 730        return count;
 731}
 732
 733/* ---------------------------------------------------------------------
 734 * PWM auto point definitions
 735 * ix = [0-1]
 736 * ap = [0-3]
 737 * --------------------------------------------------------------------- */
 738
 739/*
 740 * pwm[ix+1]_auto_point[ap+1]_temp mapping table:
 741 * Note that there is only a single set of temp auto points that controls both
 742 * PWM controllers. We still create 2 sets of sysfs files to make it look
 743 * more consistent even though they map to the same registers.
 744 *
 745 * ix ap : description
 746 * -------------------
 747 * 0  0  : pwm1/2 off temperature        (pwm_auto_temp[0])
 748 * 0  1  : pwm1/2 low speed temperature  (pwm_auto_temp[1])
 749 * 0  2  : pwm1/2 high speed temperature (pwm_auto_temp[2])
 750 * 0  3  : pwm1/2 full speed temperature (pwm_auto_temp[3])
 751 * 1  0  : pwm1/2 off temperature        (pwm_auto_temp[0])
 752 * 1  1  : pwm1/2 low speed temperature  (pwm_auto_temp[1])
 753 * 1  2  : pwm1/2 high speed temperature (pwm_auto_temp[2])
 754 * 1  3  : pwm1/2 full speed temperature (pwm_auto_temp[3])
 755 */
 756
 757static ssize_t show_pwm_auto_point_temp(struct device *dev,
 758                                        struct device_attribute *attr,
 759                                        char *buf)
 760{
 761        struct vt1211_data *data = vt1211_update_device(dev);
 762        struct sensor_device_attribute_2 *sensor_attr_2 =
 763                                                to_sensor_dev_attr_2(attr);
 764        int ix = sensor_attr_2->index;
 765        int ap = sensor_attr_2->nr;
 766
 767        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->pwm_ctl[ix] & 7,
 768                       data->pwm_auto_temp[ap]));
 769}
 770
 771static ssize_t set_pwm_auto_point_temp(struct device *dev,
 772                                       struct device_attribute *attr,
 773                                       const char *buf, size_t count)
 774{
 775        struct vt1211_data *data = dev_get_drvdata(dev);
 776        struct sensor_device_attribute_2 *sensor_attr_2 =
 777                                                to_sensor_dev_attr_2(attr);
 778        int ix = sensor_attr_2->index;
 779        int ap = sensor_attr_2->nr;
 780        int reg;
 781        long val;
 782        int err;
 783
 784        err = kstrtol(buf, 10, &val);
 785        if (err)
 786                return err;
 787
 788
 789        mutex_lock(&data->update_lock);
 790
 791        /* sync the data cache */
 792        reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
 793        data->pwm_ctl[0] = reg & 0xf;
 794        data->pwm_ctl[1] = (reg >> 4) & 0xf;
 795
 796        data->pwm_auto_temp[ap] = TEMP_TO_REG(data->pwm_ctl[ix] & 7, val);
 797        vt1211_write8(data, VT1211_REG_PWM_AUTO_TEMP(ap),
 798                      data->pwm_auto_temp[ap]);
 799        mutex_unlock(&data->update_lock);
 800
 801        return count;
 802}
 803
 804/*
 805 * pwm[ix+1]_auto_point[ap+1]_pwm mapping table:
 806 * Note that the PWM auto points 0 & 3 are hard-wired in the VT1211 and can't
 807 * be changed.
 808 *
 809 * ix ap : description
 810 * -------------------
 811 * 0  0  : pwm1 off                   (pwm_auto_pwm[0][0], hard-wired to 0)
 812 * 0  1  : pwm1 low speed duty cycle  (pwm_auto_pwm[0][1])
 813 * 0  2  : pwm1 high speed duty cycle (pwm_auto_pwm[0][2])
 814 * 0  3  : pwm1 full speed            (pwm_auto_pwm[0][3], hard-wired to 255)
 815 * 1  0  : pwm2 off                   (pwm_auto_pwm[1][0], hard-wired to 0)
 816 * 1  1  : pwm2 low speed duty cycle  (pwm_auto_pwm[1][1])
 817 * 1  2  : pwm2 high speed duty cycle (pwm_auto_pwm[1][2])
 818 * 1  3  : pwm2 full speed            (pwm_auto_pwm[1][3], hard-wired to 255)
 819 */
 820
 821static ssize_t show_pwm_auto_point_pwm(struct device *dev,
 822                                       struct device_attribute *attr,
 823                                       char *buf)
 824{
 825        struct vt1211_data *data = vt1211_update_device(dev);
 826        struct sensor_device_attribute_2 *sensor_attr_2 =
 827                                                to_sensor_dev_attr_2(attr);
 828        int ix = sensor_attr_2->index;
 829        int ap = sensor_attr_2->nr;
 830
 831        return sprintf(buf, "%d\n", data->pwm_auto_pwm[ix][ap]);
 832}
 833
 834static ssize_t set_pwm_auto_point_pwm(struct device *dev,
 835                                      struct device_attribute *attr,
 836                                      const char *buf, size_t count)
 837{
 838        struct vt1211_data *data = dev_get_drvdata(dev);
 839        struct sensor_device_attribute_2 *sensor_attr_2 =
 840                                                to_sensor_dev_attr_2(attr);
 841        int ix = sensor_attr_2->index;
 842        int ap = sensor_attr_2->nr;
 843        unsigned long val;
 844        int err;
 845
 846        err = kstrtoul(buf, 10, &val);
 847        if (err)
 848                return err;
 849
 850        mutex_lock(&data->update_lock);
 851        data->pwm_auto_pwm[ix][ap] = clamp_val(val, 0, 255);
 852        vt1211_write8(data, VT1211_REG_PWM_AUTO_PWM(ix, ap),
 853                      data->pwm_auto_pwm[ix][ap]);
 854        mutex_unlock(&data->update_lock);
 855
 856        return count;
 857}
 858
 859/* ---------------------------------------------------------------------
 860 * Miscellaneous sysfs interfaces (VRM, VID, name, and (legacy) alarms)
 861 * --------------------------------------------------------------------- */
 862
 863static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
 864                        char *buf)
 865{
 866        struct vt1211_data *data = dev_get_drvdata(dev);
 867
 868        return sprintf(buf, "%d\n", data->vrm);
 869}
 870
 871static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
 872                       const char *buf, size_t count)
 873{
 874        struct vt1211_data *data = dev_get_drvdata(dev);
 875        unsigned long val;
 876        int err;
 877
 878        err = kstrtoul(buf, 10, &val);
 879        if (err)
 880                return err;
 881
 882        data->vrm = val;
 883
 884        return count;
 885}
 886
 887static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
 888                        char *buf)
 889{
 890        struct vt1211_data *data = dev_get_drvdata(dev);
 891
 892        return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
 893}
 894
 895static ssize_t show_name(struct device *dev,
 896                         struct device_attribute *attr, char *buf)
 897{
 898        struct vt1211_data *data = dev_get_drvdata(dev);
 899
 900        return sprintf(buf, "%s\n", data->name);
 901}
 902
 903static ssize_t show_alarms(struct device *dev,
 904                           struct device_attribute *attr, char *buf)
 905{
 906        struct vt1211_data *data = vt1211_update_device(dev);
 907
 908        return sprintf(buf, "%d\n", data->alarms);
 909}
 910
 911/* ---------------------------------------------------------------------
 912 * Device attribute structs
 913 * --------------------------------------------------------------------- */
 914
 915#define SENSOR_ATTR_IN(ix) \
 916{       SENSOR_ATTR_2(in##ix##_input, S_IRUGO, \
 917                show_in, NULL, SHOW_IN_INPUT, ix), \
 918        SENSOR_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \
 919                show_in, set_in, SHOW_SET_IN_MIN, ix), \
 920        SENSOR_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \
 921                show_in, set_in, SHOW_SET_IN_MAX, ix), \
 922        SENSOR_ATTR_2(in##ix##_alarm, S_IRUGO, \
 923                show_in, NULL, SHOW_IN_ALARM, ix) \
 924}
 925
 926static struct sensor_device_attribute_2 vt1211_sysfs_in[][4] = {
 927        SENSOR_ATTR_IN(0),
 928        SENSOR_ATTR_IN(1),
 929        SENSOR_ATTR_IN(2),
 930        SENSOR_ATTR_IN(3),
 931        SENSOR_ATTR_IN(4),
 932        SENSOR_ATTR_IN(5)
 933};
 934
 935#define IN_UNIT_ATTRS(X)                        \
 936{       &vt1211_sysfs_in[X][0].dev_attr.attr,   \
 937        &vt1211_sysfs_in[X][1].dev_attr.attr,   \
 938        &vt1211_sysfs_in[X][2].dev_attr.attr,   \
 939        &vt1211_sysfs_in[X][3].dev_attr.attr,   \
 940        NULL                                    \
 941}
 942
 943static struct attribute *vt1211_in_attr[][5] = {
 944        IN_UNIT_ATTRS(0),
 945        IN_UNIT_ATTRS(1),
 946        IN_UNIT_ATTRS(2),
 947        IN_UNIT_ATTRS(3),
 948        IN_UNIT_ATTRS(4),
 949        IN_UNIT_ATTRS(5)
 950};
 951
 952static const struct attribute_group vt1211_in_attr_group[] = {
 953        { .attrs = vt1211_in_attr[0] },
 954        { .attrs = vt1211_in_attr[1] },
 955        { .attrs = vt1211_in_attr[2] },
 956        { .attrs = vt1211_in_attr[3] },
 957        { .attrs = vt1211_in_attr[4] },
 958        { .attrs = vt1211_in_attr[5] }
 959};
 960
 961#define SENSOR_ATTR_TEMP(ix) \
 962{       SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \
 963                show_temp, NULL, SHOW_TEMP_INPUT, ix-1), \
 964        SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
 965                show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1), \
 966        SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \
 967                show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1), \
 968        SENSOR_ATTR_2(temp##ix##_alarm, S_IRUGO, \
 969                show_temp, NULL, SHOW_TEMP_ALARM, ix-1) \
 970}
 971
 972static struct sensor_device_attribute_2 vt1211_sysfs_temp[][4] = {
 973        SENSOR_ATTR_TEMP(1),
 974        SENSOR_ATTR_TEMP(2),
 975        SENSOR_ATTR_TEMP(3),
 976        SENSOR_ATTR_TEMP(4),
 977        SENSOR_ATTR_TEMP(5),
 978        SENSOR_ATTR_TEMP(6),
 979        SENSOR_ATTR_TEMP(7),
 980};
 981
 982#define TEMP_UNIT_ATTRS(X)                      \
 983{       &vt1211_sysfs_temp[X][0].dev_attr.attr, \
 984        &vt1211_sysfs_temp[X][1].dev_attr.attr, \
 985        &vt1211_sysfs_temp[X][2].dev_attr.attr, \
 986        &vt1211_sysfs_temp[X][3].dev_attr.attr, \
 987        NULL                                    \
 988}
 989
 990static struct attribute *vt1211_temp_attr[][5] = {
 991        TEMP_UNIT_ATTRS(0),
 992        TEMP_UNIT_ATTRS(1),
 993        TEMP_UNIT_ATTRS(2),
 994        TEMP_UNIT_ATTRS(3),
 995        TEMP_UNIT_ATTRS(4),
 996        TEMP_UNIT_ATTRS(5),
 997        TEMP_UNIT_ATTRS(6)
 998};
 999
1000static const struct attribute_group vt1211_temp_attr_group[] = {
1001        { .attrs = vt1211_temp_attr[0] },
1002        { .attrs = vt1211_temp_attr[1] },
1003        { .attrs = vt1211_temp_attr[2] },
1004        { .attrs = vt1211_temp_attr[3] },
1005        { .attrs = vt1211_temp_attr[4] },
1006        { .attrs = vt1211_temp_attr[5] },
1007        { .attrs = vt1211_temp_attr[6] }
1008};
1009
1010#define SENSOR_ATTR_FAN(ix) \
1011        SENSOR_ATTR_2(fan##ix##_input, S_IRUGO, \
1012                show_fan, NULL, SHOW_FAN_INPUT, ix-1), \
1013        SENSOR_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
1014                show_fan, set_fan, SHOW_SET_FAN_MIN, ix-1), \
1015        SENSOR_ATTR_2(fan##ix##_div, S_IRUGO | S_IWUSR, \
1016                show_fan, set_fan, SHOW_SET_FAN_DIV, ix-1), \
1017        SENSOR_ATTR_2(fan##ix##_alarm, S_IRUGO, \
1018                show_fan, NULL, SHOW_FAN_ALARM, ix-1)
1019
1020#define SENSOR_ATTR_PWM(ix) \
1021        SENSOR_ATTR_2(pwm##ix, S_IRUGO, \
1022                show_pwm, NULL, SHOW_PWM, ix-1), \
1023        SENSOR_ATTR_2(pwm##ix##_enable, S_IRUGO | S_IWUSR, \
1024                show_pwm, set_pwm, SHOW_SET_PWM_ENABLE, ix-1), \
1025        SENSOR_ATTR_2(pwm##ix##_auto_channels_temp, S_IRUGO | S_IWUSR, \
1026                show_pwm, set_pwm, SHOW_SET_PWM_AUTO_CHANNELS_TEMP, ix-1)
1027
1028#define SENSOR_ATTR_PWM_FREQ(ix) \
1029        SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \
1030                show_pwm, set_pwm, SHOW_SET_PWM_FREQ, ix-1)
1031
1032#define SENSOR_ATTR_PWM_FREQ_RO(ix) \
1033        SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO, \
1034                show_pwm, NULL, SHOW_SET_PWM_FREQ, ix-1)
1035
1036#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) \
1037        SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO | S_IWUSR, \
1038                show_pwm_auto_point_temp, set_pwm_auto_point_temp, \
1039                ap-1, ix-1)
1040
1041#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) \
1042        SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO, \
1043                show_pwm_auto_point_temp, NULL, \
1044                ap-1, ix-1)
1045
1046#define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) \
1047        SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO | S_IWUSR, \
1048                show_pwm_auto_point_pwm, set_pwm_auto_point_pwm, \
1049                ap-1, ix-1)
1050
1051#define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) \
1052        SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO, \
1053                show_pwm_auto_point_pwm, NULL, \
1054                ap-1, ix-1)
1055
1056static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = {
1057        SENSOR_ATTR_FAN(1),
1058        SENSOR_ATTR_FAN(2),
1059        SENSOR_ATTR_PWM(1),
1060        SENSOR_ATTR_PWM(2),
1061        SENSOR_ATTR_PWM_FREQ(1),
1062        SENSOR_ATTR_PWM_FREQ_RO(2),
1063        SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 1),
1064        SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 2),
1065        SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 3),
1066        SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 4),
1067        SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 1),
1068        SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 2),
1069        SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 3),
1070        SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 4),
1071        SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 1),
1072        SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 2),
1073        SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 3),
1074        SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 4),
1075        SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 1),
1076        SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 2),
1077        SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 3),
1078        SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 4),
1079};
1080
1081static struct device_attribute vt1211_sysfs_misc[] = {
1082        __ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm),
1083        __ATTR(cpu0_vid, S_IRUGO, show_vid, NULL),
1084        __ATTR(name, S_IRUGO, show_name, NULL),
1085        __ATTR(alarms, S_IRUGO, show_alarms, NULL),
1086};
1087
1088/* ---------------------------------------------------------------------
1089 * Device registration and initialization
1090 * --------------------------------------------------------------------- */
1091
1092static void vt1211_init_device(struct vt1211_data *data)
1093{
1094        /* set VRM */
1095        data->vrm = vid_which_vrm();
1096
1097        /* Read (and initialize) UCH config */
1098        data->uch_config = vt1211_read8(data, VT1211_REG_UCH_CONFIG);
1099        if (uch_config > -1) {
1100                data->uch_config = (data->uch_config & 0x83) |
1101                                   (uch_config << 2);
1102                vt1211_write8(data, VT1211_REG_UCH_CONFIG, data->uch_config);
1103        }
1104
1105        /*
1106         * Initialize the interrupt mode (if request at module load time).
1107         * The VT1211 implements 3 different modes for clearing interrupts:
1108         * 0: Clear INT when status register is read. Regenerate INT as long
1109         *    as temp stays above hysteresis limit.
1110         * 1: Clear INT when status register is read. DON'T regenerate INT
1111         *    until temp falls below hysteresis limit and exceeds hot limit
1112         *    again.
1113         * 2: Clear INT when temp falls below max limit.
1114         *
1115         * The driver only allows to force mode 0 since that's the only one
1116         * that makes sense for 'sensors'
1117         */
1118        if (int_mode == 0) {
1119                vt1211_write8(data, VT1211_REG_TEMP1_CONFIG, 0);
1120                vt1211_write8(data, VT1211_REG_TEMP2_CONFIG, 0);
1121        }
1122
1123        /* Fill in some hard wired values into our data struct */
1124        data->pwm_auto_pwm[0][3] = 255;
1125        data->pwm_auto_pwm[1][3] = 255;
1126}
1127
1128static void vt1211_remove_sysfs(struct platform_device *pdev)
1129{
1130        struct device *dev = &pdev->dev;
1131        int i;
1132
1133        for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++)
1134                sysfs_remove_group(&dev->kobj, &vt1211_in_attr_group[i]);
1135
1136        for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++)
1137                sysfs_remove_group(&dev->kobj, &vt1211_temp_attr_group[i]);
1138
1139        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1140                device_remove_file(dev,
1141                        &vt1211_sysfs_fan_pwm[i].dev_attr);
1142        }
1143        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++)
1144                device_remove_file(dev, &vt1211_sysfs_misc[i]);
1145}
1146
1147static int vt1211_probe(struct platform_device *pdev)
1148{
1149        struct device *dev = &pdev->dev;
1150        struct vt1211_data *data;
1151        struct resource *res;
1152        int i, err;
1153
1154        data = devm_kzalloc(dev, sizeof(struct vt1211_data), GFP_KERNEL);
1155        if (!data) {
1156                dev_err(dev, "Out of memory\n");
1157                return -ENOMEM;
1158        }
1159
1160        res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1161        if (!devm_request_region(dev, res->start, resource_size(res),
1162                                 DRVNAME)) {
1163                dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1164                        (unsigned long)res->start, (unsigned long)res->end);
1165                return -EBUSY;
1166        }
1167        data->addr = res->start;
1168        data->name = DRVNAME;
1169        mutex_init(&data->update_lock);
1170
1171        platform_set_drvdata(pdev, data);
1172
1173        /* Initialize the VT1211 chip */
1174        vt1211_init_device(data);
1175
1176        /* Create sysfs interface files */
1177        for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++) {
1178                if (ISVOLT(i, data->uch_config)) {
1179                        err = sysfs_create_group(&dev->kobj,
1180                                                 &vt1211_in_attr_group[i]);
1181                        if (err)
1182                                goto EXIT_DEV_REMOVE;
1183                }
1184        }
1185        for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++) {
1186                if (ISTEMP(i, data->uch_config)) {
1187                        err = sysfs_create_group(&dev->kobj,
1188                                                 &vt1211_temp_attr_group[i]);
1189                        if (err)
1190                                goto EXIT_DEV_REMOVE;
1191                }
1192        }
1193        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1194                err = device_create_file(dev,
1195                        &vt1211_sysfs_fan_pwm[i].dev_attr);
1196                if (err)
1197                        goto EXIT_DEV_REMOVE;
1198        }
1199        for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
1200                err = device_create_file(dev,
1201                       &vt1211_sysfs_misc[i]);
1202                if (err)
1203                        goto EXIT_DEV_REMOVE;
1204        }
1205
1206        /* Register device */
1207        data->hwmon_dev = hwmon_device_register(dev);
1208        if (IS_ERR(data->hwmon_dev)) {
1209                err = PTR_ERR(data->hwmon_dev);
1210                dev_err(dev, "Class registration failed (%d)\n", err);
1211                goto EXIT_DEV_REMOVE_SILENT;
1212        }
1213
1214        return 0;
1215
1216EXIT_DEV_REMOVE:
1217        dev_err(dev, "Sysfs interface creation failed (%d)\n", err);
1218EXIT_DEV_REMOVE_SILENT:
1219        vt1211_remove_sysfs(pdev);
1220        return err;
1221}
1222
1223static int vt1211_remove(struct platform_device *pdev)
1224{
1225        struct vt1211_data *data = platform_get_drvdata(pdev);
1226
1227        hwmon_device_unregister(data->hwmon_dev);
1228        vt1211_remove_sysfs(pdev);
1229
1230        return 0;
1231}
1232
1233static struct platform_driver vt1211_driver = {
1234        .driver = {
1235                .owner = THIS_MODULE,
1236                .name  = DRVNAME,
1237        },
1238        .probe  = vt1211_probe,
1239        .remove = vt1211_remove,
1240};
1241
1242static int __init vt1211_device_add(unsigned short address)
1243{
1244        struct resource res = {
1245                .start  = address,
1246                .end    = address + 0x7f,
1247                .flags  = IORESOURCE_IO,
1248        };
1249        int err;
1250
1251        pdev = platform_device_alloc(DRVNAME, address);
1252        if (!pdev) {
1253                err = -ENOMEM;
1254                pr_err("Device allocation failed (%d)\n", err);
1255                goto EXIT;
1256        }
1257
1258        res.name = pdev->name;
1259        err = acpi_check_resource_conflict(&res);
1260        if (err)
1261                goto EXIT_DEV_PUT;
1262
1263        err = platform_device_add_resources(pdev, &res, 1);
1264        if (err) {
1265                pr_err("Device resource addition failed (%d)\n", err);
1266                goto EXIT_DEV_PUT;
1267        }
1268
1269        err = platform_device_add(pdev);
1270        if (err) {
1271                pr_err("Device addition failed (%d)\n", err);
1272                goto EXIT_DEV_PUT;
1273        }
1274
1275        return 0;
1276
1277EXIT_DEV_PUT:
1278        platform_device_put(pdev);
1279EXIT:
1280        return err;
1281}
1282
1283static int __init vt1211_find(int sio_cip, unsigned short *address)
1284{
1285        int err = -ENODEV;
1286        int devid;
1287
1288        superio_enter(sio_cip);
1289
1290        devid = force_id ? force_id : superio_inb(sio_cip, SIO_VT1211_DEVID);
1291        if (devid != SIO_VT1211_ID)
1292                goto EXIT;
1293
1294        superio_select(sio_cip, SIO_VT1211_LDN_HWMON);
1295
1296        if ((superio_inb(sio_cip, SIO_VT1211_ACTIVE) & 1) == 0) {
1297                pr_warn("HW monitor is disabled, skipping\n");
1298                goto EXIT;
1299        }
1300
1301        *address = ((superio_inb(sio_cip, SIO_VT1211_BADDR) << 8) |
1302                    (superio_inb(sio_cip, SIO_VT1211_BADDR + 1))) & 0xff00;
1303        if (*address == 0) {
1304                pr_warn("Base address is not set, skipping\n");
1305                goto EXIT;
1306        }
1307
1308        err = 0;
1309        pr_info("Found VT1211 chip at 0x%04x, revision %u\n",
1310                *address, superio_inb(sio_cip, SIO_VT1211_DEVREV));
1311
1312EXIT:
1313        superio_exit(sio_cip);
1314        return err;
1315}
1316
1317static int __init vt1211_init(void)
1318{
1319        int err;
1320        unsigned short address = 0;
1321
1322        err = vt1211_find(SIO_REG_CIP1, &address);
1323        if (err) {
1324                err = vt1211_find(SIO_REG_CIP2, &address);
1325                if (err)
1326                        goto EXIT;
1327        }
1328
1329        if ((uch_config < -1) || (uch_config > 31)) {
1330                err = -EINVAL;
1331                pr_warn("Invalid UCH configuration %d. Choose a value between 0 and 31.\n",
1332                        uch_config);
1333                goto EXIT;
1334        }
1335
1336        if ((int_mode < -1) || (int_mode > 0)) {
1337                err = -EINVAL;
1338                pr_warn("Invalid interrupt mode %d. Only mode 0 is supported.\n",
1339                        int_mode);
1340                goto EXIT;
1341        }
1342
1343        err = platform_driver_register(&vt1211_driver);
1344        if (err)
1345                goto EXIT;
1346
1347        /* Sets global pdev as a side effect */
1348        err = vt1211_device_add(address);
1349        if (err)
1350                goto EXIT_DRV_UNREGISTER;
1351
1352        return 0;
1353
1354EXIT_DRV_UNREGISTER:
1355        platform_driver_unregister(&vt1211_driver);
1356EXIT:
1357        return err;
1358}
1359
1360static void __exit vt1211_exit(void)
1361{
1362        platform_device_unregister(pdev);
1363        platform_driver_unregister(&vt1211_driver);
1364}
1365
1366MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>");
1367MODULE_DESCRIPTION("VT1211 sensors");
1368MODULE_LICENSE("GPL");
1369
1370module_init(vt1211_init);
1371module_exit(vt1211_exit);
1372
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