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input.c

/*
 *   Copyright (c) 2006,2007 Daniel Mack, Tim Ruetz
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
*/

#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/usb.h>
#include <linux/usb/input.h>
#include <sound/core.h>
#include <sound/pcm.h>

#include "device.h"
#include "input.h"

static unsigned short keycode_ak1[] =  { KEY_C, KEY_B, KEY_A };
static unsigned short keycode_rk2[] =  { KEY_1, KEY_2, KEY_3, KEY_4,
                               KEY_5, KEY_6, KEY_7 };
static unsigned short keycode_rk3[] =  { KEY_1, KEY_2, KEY_3, KEY_4,
                               KEY_5, KEY_6, KEY_7, KEY_5, KEY_6 };

static unsigned short keycode_kore[] = {
      KEY_FN_F1,      /* "menu"               */
      KEY_FN_F7,      /* "lcd backlight       */
      KEY_FN_F2,      /* "control"            */
      KEY_FN_F3,      /* "enter"              */
      KEY_FN_F4,      /* "view"               */
      KEY_FN_F5,      /* "esc"                */
      KEY_FN_F6,      /* "sound"              */
      KEY_FN_F8,      /* array spacer, never triggered. */
      KEY_RIGHT,
      KEY_DOWN,
      KEY_UP,
      KEY_LEFT,
      KEY_SOUND,      /* "listen"             */
      KEY_RECORD,
      KEY_PLAYPAUSE,
      KEY_STOP,
      BTN_4,          /* 8 softkeys */
      BTN_3,
      BTN_2,
      BTN_1,
      BTN_8,
      BTN_7,
      BTN_6,
      BTN_5,
      KEY_BRL_DOT4,   /* touch sensitive knobs */
      KEY_BRL_DOT3,
      KEY_BRL_DOT2,
      KEY_BRL_DOT1,
      KEY_BRL_DOT8,
      KEY_BRL_DOT7,
      KEY_BRL_DOT6,
      KEY_BRL_DOT5
};

#define KONTROLX1_INPUTS      (40)
#define KONTROLS4_BUTTONS     (12 * 8)
#define KONTROLS4_AXIS        (46)

#define KONTROLS4_BUTTON(X)   ((X) + BTN_MISC)
#define KONTROLS4_ABS(X)      ((X) + ABS_HAT0X)

#define DEG90           (range / 2)
#define DEG180          (range)
#define DEG270          (DEG90 + DEG180)
#define DEG360          (DEG180 * 2)
#define HIGH_PEAK (268)
#define LOW_PEAK  (-7)

/* some of these devices have endless rotation potentiometers
 * built in which use two tapers, 90 degrees phase shifted.
 * this algorithm decodes them to one single value, ranging
 * from 0 to 999 */
static unsigned int decode_erp(unsigned char a, unsigned char b)
{
      int weight_a, weight_b;
      int pos_a, pos_b;
      int ret;
      int range = HIGH_PEAK - LOW_PEAK;
      int mid_value = (HIGH_PEAK + LOW_PEAK) / 2;

      weight_b = abs(mid_value - a) - (range / 2 - 100) / 2;

      if (weight_b < 0)
            weight_b = 0;

      if (weight_b > 100)
            weight_b = 100;

      weight_a = 100 - weight_b;

      if (a < mid_value) {
            /* 0..90 and 270..360 degrees */
            pos_b = b - LOW_PEAK + DEG270;
            if (pos_b >= DEG360)
                  pos_b -= DEG360;
      } else
            /* 90..270 degrees */
            pos_b = HIGH_PEAK - b + DEG90;


      if (b > mid_value)
            /* 0..180 degrees */
            pos_a = a - LOW_PEAK;
      else
            /* 180..360 degrees */
            pos_a = HIGH_PEAK - a + DEG180;

      /* interpolate both slider values, depending on weight factors */
      /* 0..99 x DEG360 */
      ret = pos_a * weight_a + pos_b * weight_b;

      /* normalize to 0..999 */
      ret *= 10;
      ret /= DEG360;

      if (ret < 0)
            ret += 1000;

      if (ret >= 1000)
            ret -= 1000;

      return ret;
}

#undef DEG90
#undef DEG180
#undef DEG270
#undef DEG360
#undef HIGH_PEAK
#undef LOW_PEAK

static inline void snd_caiaq_input_report_abs(struct snd_usb_caiaqdev *dev,
                                    int axis, const unsigned char *buf,
                                    int offset)
{
      input_report_abs(dev->input_dev, axis,
                   (buf[offset * 2] << 8) | buf[offset * 2 + 1]);
}

static void snd_caiaq_input_read_analog(struct snd_usb_caiaqdev *dev,
                              const unsigned char *buf,
                              unsigned int len)
{
      struct input_dev *input_dev = dev->input_dev;

      switch (dev->chip.usb_id) {
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL2):
            snd_caiaq_input_report_abs(dev, ABS_X, buf, 2);
            snd_caiaq_input_report_abs(dev, ABS_Y, buf, 0);
            snd_caiaq_input_report_abs(dev, ABS_Z, buf, 1);
            break;
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER):
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER2):
            snd_caiaq_input_report_abs(dev, ABS_X, buf, 0);
            snd_caiaq_input_report_abs(dev, ABS_Y, buf, 1);
            snd_caiaq_input_report_abs(dev, ABS_Z, buf, 2);
            break;
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLX1):
            snd_caiaq_input_report_abs(dev, ABS_HAT0X, buf, 4);
            snd_caiaq_input_report_abs(dev, ABS_HAT0Y, buf, 2);
            snd_caiaq_input_report_abs(dev, ABS_HAT1X, buf, 6);
            snd_caiaq_input_report_abs(dev, ABS_HAT1Y, buf, 1);
            snd_caiaq_input_report_abs(dev, ABS_HAT2X, buf, 7);
            snd_caiaq_input_report_abs(dev, ABS_HAT2Y, buf, 0);
            snd_caiaq_input_report_abs(dev, ABS_HAT3X, buf, 5);
            snd_caiaq_input_report_abs(dev, ABS_HAT3Y, buf, 3);
            break;
      }

      input_sync(input_dev);
}

static void snd_caiaq_input_read_erp(struct snd_usb_caiaqdev *dev,
                             const char *buf, unsigned int len)
{
      struct input_dev *input_dev = dev->input_dev;
      int i;

      switch (dev->chip.usb_id) {
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
            i = decode_erp(buf[0], buf[1]);
            input_report_abs(input_dev, ABS_X, i);
            input_sync(input_dev);
            break;
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER):
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER2):
            i = decode_erp(buf[7], buf[5]);
            input_report_abs(input_dev, ABS_HAT0X, i);
            i = decode_erp(buf[12], buf[14]);
            input_report_abs(input_dev, ABS_HAT0Y, i);
            i = decode_erp(buf[15], buf[13]);
            input_report_abs(input_dev, ABS_HAT1X, i);
            i = decode_erp(buf[0], buf[2]);
            input_report_abs(input_dev, ABS_HAT1Y, i);
            i = decode_erp(buf[3], buf[1]);
            input_report_abs(input_dev, ABS_HAT2X, i);
            i = decode_erp(buf[8], buf[10]);
            input_report_abs(input_dev, ABS_HAT2Y, i);
            i = decode_erp(buf[11], buf[9]);
            input_report_abs(input_dev, ABS_HAT3X, i);
            i = decode_erp(buf[4], buf[6]);
            input_report_abs(input_dev, ABS_HAT3Y, i);
            input_sync(input_dev);
            break;
      }
}

static void snd_caiaq_input_read_io(struct snd_usb_caiaqdev *dev,
                            unsigned char *buf, unsigned int len)
{
      struct input_dev *input_dev = dev->input_dev;
      unsigned short *keycode = input_dev->keycode;
      int i;

      if (!keycode)
            return;

      if (input_dev->id.product == USB_PID_RIGKONTROL2)
            for (i = 0; i < len; i++)
                  buf[i] = ~buf[i];

      for (i = 0; i < input_dev->keycodemax && i < len * 8; i++)
            input_report_key(input_dev, keycode[i],
                         buf[i / 8] & (1 << (i % 8)));

      switch (dev->chip.usb_id) {
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER):
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER2):
            input_report_abs(dev->input_dev, ABS_MISC, 255 - buf[4]);
            break;
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLX1):
            /* rotary encoders */
            input_report_abs(dev->input_dev, ABS_X, buf[5] & 0xf);
            input_report_abs(dev->input_dev, ABS_Y, buf[5] >> 4);
            input_report_abs(dev->input_dev, ABS_Z, buf[6] & 0xf);
            input_report_abs(dev->input_dev, ABS_MISC, buf[6] >> 4);
            break;
      }

      input_sync(input_dev);
}

#define TKS4_MSGBLOCK_SIZE    16

static void snd_usb_caiaq_tks4_dispatch(struct snd_usb_caiaqdev *dev,
                              const unsigned char *buf,
                              unsigned int len)
{
      while (len) {
            unsigned int i, block_id = (buf[0] << 8) | buf[1];

            switch (block_id) {
            case 0:
                  /* buttons */
                  for (i = 0; i < KONTROLS4_BUTTONS; i++)
                        input_report_key(dev->input_dev, KONTROLS4_BUTTON(i),
                                     (buf[4 + (i / 8)] >> (i % 8)) & 1);
                  break;

            case 1:
                  /* left wheel */
                  input_report_abs(dev->input_dev, KONTROLS4_ABS(36), buf[9] | ((buf[8] & 0x3) << 8));
                  /* right wheel */
                  input_report_abs(dev->input_dev, KONTROLS4_ABS(37), buf[13] | ((buf[12] & 0x3) << 8));

                  /* rotary encoders */
                  input_report_abs(dev->input_dev, KONTROLS4_ABS(38), buf[3] & 0xf);
                  input_report_abs(dev->input_dev, KONTROLS4_ABS(39), buf[4] >> 4);
                  input_report_abs(dev->input_dev, KONTROLS4_ABS(40), buf[4] & 0xf);
                  input_report_abs(dev->input_dev, KONTROLS4_ABS(41), buf[5] >> 4);
                  input_report_abs(dev->input_dev, KONTROLS4_ABS(42), buf[5] & 0xf);
                  input_report_abs(dev->input_dev, KONTROLS4_ABS(43), buf[6] >> 4);
                  input_report_abs(dev->input_dev, KONTROLS4_ABS(44), buf[6] & 0xf);
                  input_report_abs(dev->input_dev, KONTROLS4_ABS(45), buf[7] >> 4);
                  input_report_abs(dev->input_dev, KONTROLS4_ABS(46), buf[7] & 0xf);

                  break;
            case 2:
                  /* Volume Fader Channel D */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(0), buf, 1);
                  /* Volume Fader Channel B */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(1), buf, 2);
                  /* Volume Fader Channel A */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(2), buf, 3);
                  /* Volume Fader Channel C */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(3), buf, 4);
                  /* Loop Volume */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(4), buf, 6);
                  /* Crossfader */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(7), buf, 7);

                  break;

            case 3:
                  /* Tempo Fader R */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(6), buf, 3);
                  /* Tempo Fader L */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(5), buf, 4);
                  /* Mic Volume */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(8), buf, 6);
                  /* Cue Mix */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(9), buf, 7);

                  break;

            case 4:
                  /* Wheel distance sensor L */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(10), buf, 1);
                  /* Wheel distance sensor R */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(11), buf, 2);
                  /* Channel D EQ - Filter */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(12), buf, 3);
                  /* Channel D EQ - Low */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(13), buf, 4);
                  /* Channel D EQ - Mid */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(14), buf, 5);
                  /* Channel D EQ - Hi */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(15), buf, 6);
                  /* FX2 - dry/wet */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(16), buf, 7);

                  break;

            case 5:
                  /* FX2 - 1 */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(17), buf, 1);
                  /* FX2 - 2 */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(18), buf, 2);
                  /* FX2 - 3 */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(19), buf, 3);
                  /* Channel B EQ - Filter */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(20), buf, 4);
                  /* Channel B EQ - Low */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(21), buf, 5);
                  /* Channel B EQ - Mid */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(22), buf, 6);
                  /* Channel B EQ - Hi */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(23), buf, 7);

                  break;

            case 6:
                  /* Channel A EQ - Filter */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(24), buf, 1);
                  /* Channel A EQ - Low */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(25), buf, 2);
                  /* Channel A EQ - Mid */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(26), buf, 3);
                  /* Channel A EQ - Hi */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(27), buf, 4);
                  /* Channel C EQ - Filter */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(28), buf, 5);
                  /* Channel C EQ - Low */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(29), buf, 6);
                  /* Channel C EQ - Mid */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(30), buf, 7);

                  break;

            case 7:
                  /* Channel C EQ - Hi */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(31), buf, 1);
                  /* FX1 - wet/dry */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(32), buf, 2);
                  /* FX1 - 1 */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(33), buf, 3);
                  /* FX1 - 2 */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(34), buf, 4);
                  /* FX1 - 3 */
                  snd_caiaq_input_report_abs(dev, KONTROLS4_ABS(35), buf, 5);

                  break;

            default:
                  debug("%s(): bogus block (id %d)\n",
                        __func__, block_id);
                  return;
            }

            len -= TKS4_MSGBLOCK_SIZE;
            buf += TKS4_MSGBLOCK_SIZE;
      }

      input_sync(dev->input_dev);
}

static void snd_usb_caiaq_ep4_reply_dispatch(struct urb *urb)
{
      struct snd_usb_caiaqdev *dev = urb->context;
      unsigned char *buf = urb->transfer_buffer;
      int ret;

      if (urb->status || !dev || urb != dev->ep4_in_urb)
            return;

      switch (dev->chip.usb_id) {
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLX1):
            if (urb->actual_length < 24)
                  goto requeue;

            if (buf[0] & 0x3)
                  snd_caiaq_input_read_io(dev, buf + 1, 7);

            if (buf[0] & 0x4)
                  snd_caiaq_input_read_analog(dev, buf + 8, 16);

            break;

      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLS4):
            snd_usb_caiaq_tks4_dispatch(dev, buf, urb->actual_length);
            break;
      }

requeue:
      dev->ep4_in_urb->actual_length = 0;
      ret = usb_submit_urb(dev->ep4_in_urb, GFP_ATOMIC);
      if (ret < 0)
            log("unable to submit urb. OOM!?\n");
}

static int snd_usb_caiaq_input_open(struct input_dev *idev)
{
      struct snd_usb_caiaqdev *dev = input_get_drvdata(idev);

      if (!dev)
            return -EINVAL;

      switch (dev->chip.usb_id) {
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLX1):
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLS4):
            if (usb_submit_urb(dev->ep4_in_urb, GFP_KERNEL) != 0)
                  return -EIO;
            break;
      }

      return 0;
}

static void snd_usb_caiaq_input_close(struct input_dev *idev)
{
      struct snd_usb_caiaqdev *dev = input_get_drvdata(idev);

      if (!dev)
            return;

      switch (dev->chip.usb_id) {
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLX1):
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLS4):
            usb_kill_urb(dev->ep4_in_urb);
            break;
      }
}

void snd_usb_caiaq_input_dispatch(struct snd_usb_caiaqdev *dev,
                          char *buf,
                          unsigned int len)
{
      if (!dev->input_dev || len < 1)
            return;

      switch (buf[0]) {
      case EP1_CMD_READ_ANALOG:
            snd_caiaq_input_read_analog(dev, buf + 1, len - 1);
            break;
      case EP1_CMD_READ_ERP:
            snd_caiaq_input_read_erp(dev, buf + 1, len - 1);
            break;
      case EP1_CMD_READ_IO:
            snd_caiaq_input_read_io(dev, buf + 1, len - 1);
            break;
      }
}

int snd_usb_caiaq_input_init(struct snd_usb_caiaqdev *dev)
{
      struct usb_device *usb_dev = dev->chip.dev;
      struct input_dev *input;
      int i, ret = 0;

      input = input_allocate_device();
      if (!input)
            return -ENOMEM;

      usb_make_path(usb_dev, dev->phys, sizeof(dev->phys));
      strlcat(dev->phys, "/input0", sizeof(dev->phys));

      input->name = dev->product_name;
      input->phys = dev->phys;
      usb_to_input_id(usb_dev, &input->id);
      input->dev.parent = &usb_dev->dev;

      input_set_drvdata(input, dev);

      switch (dev->chip.usb_id) {
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL2):
            input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
            input->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) |
                  BIT_MASK(ABS_Z);
            BUILD_BUG_ON(sizeof(dev->keycode) < sizeof(keycode_rk2));
            memcpy(dev->keycode, keycode_rk2, sizeof(keycode_rk2));
            input->keycodemax = ARRAY_SIZE(keycode_rk2);
            input_set_abs_params(input, ABS_X, 0, 4096, 0, 10);
            input_set_abs_params(input, ABS_Y, 0, 4096, 0, 10);
            input_set_abs_params(input, ABS_Z, 0, 4096, 0, 10);
            snd_usb_caiaq_set_auto_msg(dev, 1, 10, 0);
            break;
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
            input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
            input->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) |
                  BIT_MASK(ABS_Z);
            BUILD_BUG_ON(sizeof(dev->keycode) < sizeof(keycode_rk3));
            memcpy(dev->keycode, keycode_rk3, sizeof(keycode_rk3));
            input->keycodemax = ARRAY_SIZE(keycode_rk3);
            input_set_abs_params(input, ABS_X, 0, 1024, 0, 10);
            input_set_abs_params(input, ABS_Y, 0, 1024, 0, 10);
            input_set_abs_params(input, ABS_Z, 0, 1024, 0, 10);
            snd_usb_caiaq_set_auto_msg(dev, 1, 10, 0);
            break;
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
            input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
            input->absbit[0] = BIT_MASK(ABS_X);
            BUILD_BUG_ON(sizeof(dev->keycode) < sizeof(keycode_ak1));
            memcpy(dev->keycode, keycode_ak1, sizeof(keycode_ak1));
            input->keycodemax = ARRAY_SIZE(keycode_ak1);
            input_set_abs_params(input, ABS_X, 0, 999, 0, 10);
            snd_usb_caiaq_set_auto_msg(dev, 1, 0, 5);
            break;
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER):
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER2):
            input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
            input->absbit[0] = BIT_MASK(ABS_HAT0X) | BIT_MASK(ABS_HAT0Y) |
                           BIT_MASK(ABS_HAT1X) | BIT_MASK(ABS_HAT1Y) |
                           BIT_MASK(ABS_HAT2X) | BIT_MASK(ABS_HAT2Y) |
                           BIT_MASK(ABS_HAT3X) | BIT_MASK(ABS_HAT3Y) |
                           BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) |
                           BIT_MASK(ABS_Z);
            input->absbit[BIT_WORD(ABS_MISC)] |= BIT_MASK(ABS_MISC);
            BUILD_BUG_ON(sizeof(dev->keycode) < sizeof(keycode_kore));
            memcpy(dev->keycode, keycode_kore, sizeof(keycode_kore));
            input->keycodemax = ARRAY_SIZE(keycode_kore);
            input_set_abs_params(input, ABS_HAT0X, 0, 999, 0, 10);
            input_set_abs_params(input, ABS_HAT0Y, 0, 999, 0, 10);
            input_set_abs_params(input, ABS_HAT1X, 0, 999, 0, 10);
            input_set_abs_params(input, ABS_HAT1Y, 0, 999, 0, 10);
            input_set_abs_params(input, ABS_HAT2X, 0, 999, 0, 10);
            input_set_abs_params(input, ABS_HAT2Y, 0, 999, 0, 10);
            input_set_abs_params(input, ABS_HAT3X, 0, 999, 0, 10);
            input_set_abs_params(input, ABS_HAT3Y, 0, 999, 0, 10);
            input_set_abs_params(input, ABS_X, 0, 4096, 0, 10);
            input_set_abs_params(input, ABS_Y, 0, 4096, 0, 10);
            input_set_abs_params(input, ABS_Z, 0, 4096, 0, 10);
            input_set_abs_params(input, ABS_MISC, 0, 255, 0, 1);
            snd_usb_caiaq_set_auto_msg(dev, 1, 10, 5);
            break;
      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLX1):
            input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
            input->absbit[0] = BIT_MASK(ABS_HAT0X) | BIT_MASK(ABS_HAT0Y) |
                           BIT_MASK(ABS_HAT1X) | BIT_MASK(ABS_HAT1Y) |
                           BIT_MASK(ABS_HAT2X) | BIT_MASK(ABS_HAT2Y) |
                           BIT_MASK(ABS_HAT3X) | BIT_MASK(ABS_HAT3Y) |
                           BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) |
                           BIT_MASK(ABS_Z);
            input->absbit[BIT_WORD(ABS_MISC)] |= BIT_MASK(ABS_MISC);
            BUILD_BUG_ON(sizeof(dev->keycode) < KONTROLX1_INPUTS);
            for (i = 0; i < KONTROLX1_INPUTS; i++)
                  dev->keycode[i] = BTN_MISC + i;
            input->keycodemax = KONTROLX1_INPUTS;

            /* analog potentiometers */
            input_set_abs_params(input, ABS_HAT0X, 0, 4096, 0, 10);
            input_set_abs_params(input, ABS_HAT0Y, 0, 4096, 0, 10);
            input_set_abs_params(input, ABS_HAT1X, 0, 4096, 0, 10);
            input_set_abs_params(input, ABS_HAT1Y, 0, 4096, 0, 10);
            input_set_abs_params(input, ABS_HAT2X, 0, 4096, 0, 10);
            input_set_abs_params(input, ABS_HAT2Y, 0, 4096, 0, 10);
            input_set_abs_params(input, ABS_HAT3X, 0, 4096, 0, 10);
            input_set_abs_params(input, ABS_HAT3Y, 0, 4096, 0, 10);

            /* rotary encoders */
            input_set_abs_params(input, ABS_X, 0, 0xf, 0, 1);
            input_set_abs_params(input, ABS_Y, 0, 0xf, 0, 1);
            input_set_abs_params(input, ABS_Z, 0, 0xf, 0, 1);
            input_set_abs_params(input, ABS_MISC, 0, 0xf, 0, 1);

            dev->ep4_in_urb = usb_alloc_urb(0, GFP_KERNEL);
            if (!dev->ep4_in_urb) {
                  ret = -ENOMEM;
                  goto exit_free_idev;
            }

            usb_fill_bulk_urb(dev->ep4_in_urb, usb_dev,
                          usb_rcvbulkpipe(usb_dev, 0x4),
                          dev->ep4_in_buf, EP4_BUFSIZE,
                          snd_usb_caiaq_ep4_reply_dispatch, dev);

            snd_usb_caiaq_set_auto_msg(dev, 1, 10, 5);

            break;

      case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLS4):
            input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
            BUILD_BUG_ON(sizeof(dev->keycode) < KONTROLS4_BUTTONS);
            for (i = 0; i < KONTROLS4_BUTTONS; i++)
                  dev->keycode[i] = KONTROLS4_BUTTON(i);
            input->keycodemax = KONTROLS4_BUTTONS;

            for (i = 0; i < KONTROLS4_AXIS; i++) {
                  int axis = KONTROLS4_ABS(i);
                  input->absbit[BIT_WORD(axis)] |= BIT_MASK(axis);
            }

            /* 36 analog potentiometers and faders */
            for (i = 0; i < 36; i++)
                  input_set_abs_params(input, KONTROLS4_ABS(i), 0, 0xfff, 0, 10);

            /* 2 encoder wheels */
            input_set_abs_params(input, KONTROLS4_ABS(36), 0, 0x3ff, 0, 1);
            input_set_abs_params(input, KONTROLS4_ABS(37), 0, 0x3ff, 0, 1);

            /* 9 rotary encoders */
            for (i = 0; i < 9; i++)
                  input_set_abs_params(input, KONTROLS4_ABS(38+i), 0, 0xf, 0, 1);

            dev->ep4_in_urb = usb_alloc_urb(0, GFP_KERNEL);
            if (!dev->ep4_in_urb) {
                  ret = -ENOMEM;
                  goto exit_free_idev;
            }

            usb_fill_bulk_urb(dev->ep4_in_urb, usb_dev,
                          usb_rcvbulkpipe(usb_dev, 0x4),
                          dev->ep4_in_buf, EP4_BUFSIZE,
                          snd_usb_caiaq_ep4_reply_dispatch, dev);

            snd_usb_caiaq_set_auto_msg(dev, 1, 10, 5);

            break;

      default:
            /* no input methods supported on this device */
            goto exit_free_idev;
      }

      input->open = snd_usb_caiaq_input_open;
      input->close = snd_usb_caiaq_input_close;
      input->keycode = dev->keycode;
      input->keycodesize = sizeof(unsigned short);
      for (i = 0; i < input->keycodemax; i++)
            __set_bit(dev->keycode[i], input->keybit);

      ret = input_register_device(input);
      if (ret < 0)
            goto exit_free_idev;

      dev->input_dev = input;
      return 0;

exit_free_idev:
      input_free_device(input);
      return ret;
}

void snd_usb_caiaq_input_free(struct snd_usb_caiaqdev *dev)
{
      if (!dev || !dev->input_dev)
            return;

      usb_kill_urb(dev->ep4_in_urb);
      usb_free_urb(dev->ep4_in_urb);
      dev->ep4_in_urb = NULL;

      input_unregister_device(dev->input_dev);
      dev->input_dev = NULL;
}


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