Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / sound / usb / caiaq / input.c
diff --git a/kernel/sound/usb/caiaq/input.c b/kernel/sound/usb/caiaq/input.c
new file mode 100644 (file)
index 0000000..4b3fb91
--- /dev/null
@@ -0,0 +1,846 @@
+/*
+ *   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/device.h>
+#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_8, KEY_9 };
+
+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 MASCHINE_BUTTONS   (42)
+#define MASCHINE_BUTTON(X) ((X) + BTN_MISC)
+#define MASCHINE_PADS      (16)
+#define MASCHINE_PAD(X)    ((X) + ABS_PRESSURE)
+
+static unsigned short keycode_maschine[] = {
+       MASCHINE_BUTTON(40), /* mute       */
+       MASCHINE_BUTTON(39), /* solo       */
+       MASCHINE_BUTTON(38), /* select     */
+       MASCHINE_BUTTON(37), /* duplicate  */
+       MASCHINE_BUTTON(36), /* navigate   */
+       MASCHINE_BUTTON(35), /* pad mode   */
+       MASCHINE_BUTTON(34), /* pattern    */
+       MASCHINE_BUTTON(33), /* scene      */
+       KEY_RESERVED, /* spacer */
+
+       MASCHINE_BUTTON(30), /* rec        */
+       MASCHINE_BUTTON(31), /* erase      */
+       MASCHINE_BUTTON(32), /* shift      */
+       MASCHINE_BUTTON(28), /* grid       */
+       MASCHINE_BUTTON(27), /* >          */
+       MASCHINE_BUTTON(26), /* <          */
+       MASCHINE_BUTTON(25), /* restart    */
+
+       MASCHINE_BUTTON(21), /* E          */
+       MASCHINE_BUTTON(22), /* F          */
+       MASCHINE_BUTTON(23), /* G          */
+       MASCHINE_BUTTON(24), /* H          */
+       MASCHINE_BUTTON(20), /* D          */
+       MASCHINE_BUTTON(19), /* C          */
+       MASCHINE_BUTTON(18), /* B          */
+       MASCHINE_BUTTON(17), /* A          */
+
+       MASCHINE_BUTTON(0),  /* control    */
+       MASCHINE_BUTTON(2),  /* browse     */
+       MASCHINE_BUTTON(4),  /* <          */
+       MASCHINE_BUTTON(6),  /* snap       */
+       MASCHINE_BUTTON(7),  /* autowrite  */
+       MASCHINE_BUTTON(5),  /* >          */
+       MASCHINE_BUTTON(3),  /* sampling   */
+       MASCHINE_BUTTON(1),  /* step       */
+
+       MASCHINE_BUTTON(15), /* 8 softkeys */
+       MASCHINE_BUTTON(14),
+       MASCHINE_BUTTON(13),
+       MASCHINE_BUTTON(12),
+       MASCHINE_BUTTON(11),
+       MASCHINE_BUTTON(10),
+       MASCHINE_BUTTON(9),
+       MASCHINE_BUTTON(8),
+
+       MASCHINE_BUTTON(16), /* note repeat */
+       MASCHINE_BUTTON(29)  /* play        */
+};
+
+#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 *cdev,
+                                             int axis, const unsigned char *buf,
+                                             int offset)
+{
+       input_report_abs(cdev->input_dev, axis,
+                        (buf[offset * 2] << 8) | buf[offset * 2 + 1]);
+}
+
+static void snd_caiaq_input_read_analog(struct snd_usb_caiaqdev *cdev,
+                                       const unsigned char *buf,
+                                       unsigned int len)
+{
+       struct input_dev *input_dev = cdev->input_dev;
+
+       switch (cdev->chip.usb_id) {
+       case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL2):
+               snd_caiaq_input_report_abs(cdev, ABS_X, buf, 2);
+               snd_caiaq_input_report_abs(cdev, ABS_Y, buf, 0);
+               snd_caiaq_input_report_abs(cdev, 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(cdev, ABS_X, buf, 0);
+               snd_caiaq_input_report_abs(cdev, ABS_Y, buf, 1);
+               snd_caiaq_input_report_abs(cdev, ABS_Z, buf, 2);
+               break;
+       case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLX1):
+               snd_caiaq_input_report_abs(cdev, ABS_HAT0X, buf, 4);
+               snd_caiaq_input_report_abs(cdev, ABS_HAT0Y, buf, 2);
+               snd_caiaq_input_report_abs(cdev, ABS_HAT1X, buf, 6);
+               snd_caiaq_input_report_abs(cdev, ABS_HAT1Y, buf, 1);
+               snd_caiaq_input_report_abs(cdev, ABS_HAT2X, buf, 7);
+               snd_caiaq_input_report_abs(cdev, ABS_HAT2Y, buf, 0);
+               snd_caiaq_input_report_abs(cdev, ABS_HAT3X, buf, 5);
+               snd_caiaq_input_report_abs(cdev, ABS_HAT3Y, buf, 3);
+               break;
+       }
+
+       input_sync(input_dev);
+}
+
+static void snd_caiaq_input_read_erp(struct snd_usb_caiaqdev *cdev,
+                                    const char *buf, unsigned int len)
+{
+       struct input_dev *input_dev = cdev->input_dev;
+       int i;
+
+       switch (cdev->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;
+
+       case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_MASCHINECONTROLLER):
+               /* 4 under the left screen */
+               input_report_abs(input_dev, ABS_HAT0X, decode_erp(buf[21], buf[20]));
+               input_report_abs(input_dev, ABS_HAT0Y, decode_erp(buf[15], buf[14]));
+               input_report_abs(input_dev, ABS_HAT1X, decode_erp(buf[9],  buf[8]));
+               input_report_abs(input_dev, ABS_HAT1Y, decode_erp(buf[3],  buf[2]));
+
+               /* 4 under the right screen */
+               input_report_abs(input_dev, ABS_HAT2X, decode_erp(buf[19], buf[18]));
+               input_report_abs(input_dev, ABS_HAT2Y, decode_erp(buf[13], buf[12]));
+               input_report_abs(input_dev, ABS_HAT3X, decode_erp(buf[7],  buf[6]));
+               input_report_abs(input_dev, ABS_HAT3Y, decode_erp(buf[1],  buf[0]));
+
+               /* volume */
+               input_report_abs(input_dev, ABS_RX, decode_erp(buf[17], buf[16]));
+               /* tempo */
+               input_report_abs(input_dev, ABS_RY, decode_erp(buf[11], buf[10]));
+               /* swing */
+               input_report_abs(input_dev, ABS_RZ, decode_erp(buf[5],  buf[4]));
+
+               input_sync(input_dev);
+               break;
+       }
+}
+
+static void snd_caiaq_input_read_io(struct snd_usb_caiaqdev *cdev,
+                                   unsigned char *buf, unsigned int len)
+{
+       struct input_dev *input_dev = cdev->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 (cdev->chip.usb_id) {
+       case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER):
+       case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER2):
+               input_report_abs(cdev->input_dev, ABS_MISC, 255 - buf[4]);
+               break;
+       case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLX1):
+               /* rotary encoders */
+               input_report_abs(cdev->input_dev, ABS_X, buf[5] & 0xf);
+               input_report_abs(cdev->input_dev, ABS_Y, buf[5] >> 4);
+               input_report_abs(cdev->input_dev, ABS_Z, buf[6] & 0xf);
+               input_report_abs(cdev->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 *cdev,
+                                       const unsigned char *buf,
+                                       unsigned int len)
+{
+       struct device *dev = caiaqdev_to_dev(cdev);
+
+       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(cdev->input_dev, KONTROLS4_BUTTON(i),
+                                                (buf[4 + (i / 8)] >> (i % 8)) & 1);
+                       break;
+
+               case 1:
+                       /* left wheel */
+                       input_report_abs(cdev->input_dev, KONTROLS4_ABS(36), buf[9] | ((buf[8] & 0x3) << 8));
+                       /* right wheel */
+                       input_report_abs(cdev->input_dev, KONTROLS4_ABS(37), buf[13] | ((buf[12] & 0x3) << 8));
+
+                       /* rotary encoders */
+                       input_report_abs(cdev->input_dev, KONTROLS4_ABS(38), buf[3] & 0xf);
+                       input_report_abs(cdev->input_dev, KONTROLS4_ABS(39), buf[4] >> 4);
+                       input_report_abs(cdev->input_dev, KONTROLS4_ABS(40), buf[4] & 0xf);
+                       input_report_abs(cdev->input_dev, KONTROLS4_ABS(41), buf[5] >> 4);
+                       input_report_abs(cdev->input_dev, KONTROLS4_ABS(42), buf[5] & 0xf);
+                       input_report_abs(cdev->input_dev, KONTROLS4_ABS(43), buf[6] >> 4);
+                       input_report_abs(cdev->input_dev, KONTROLS4_ABS(44), buf[6] & 0xf);
+                       input_report_abs(cdev->input_dev, KONTROLS4_ABS(45), buf[7] >> 4);
+                       input_report_abs(cdev->input_dev, KONTROLS4_ABS(46), buf[7] & 0xf);
+
+                       break;
+               case 2:
+                       /* Volume Fader Channel D */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(0), buf, 1);
+                       /* Volume Fader Channel B */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(1), buf, 2);
+                       /* Volume Fader Channel A */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(2), buf, 3);
+                       /* Volume Fader Channel C */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(3), buf, 4);
+                       /* Loop Volume */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(4), buf, 6);
+                       /* Crossfader */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(7), buf, 7);
+
+                       break;
+
+               case 3:
+                       /* Tempo Fader R */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(6), buf, 3);
+                       /* Tempo Fader L */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(5), buf, 4);
+                       /* Mic Volume */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(8), buf, 6);
+                       /* Cue Mix */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(9), buf, 7);
+
+                       break;
+
+               case 4:
+                       /* Wheel distance sensor L */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(10), buf, 1);
+                       /* Wheel distance sensor R */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(11), buf, 2);
+                       /* Channel D EQ - Filter */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(12), buf, 3);
+                       /* Channel D EQ - Low */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(13), buf, 4);
+                       /* Channel D EQ - Mid */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(14), buf, 5);
+                       /* Channel D EQ - Hi */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(15), buf, 6);
+                       /* FX2 - dry/wet */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(16), buf, 7);
+
+                       break;
+
+               case 5:
+                       /* FX2 - 1 */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(17), buf, 1);
+                       /* FX2 - 2 */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(18), buf, 2);
+                       /* FX2 - 3 */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(19), buf, 3);
+                       /* Channel B EQ - Filter */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(20), buf, 4);
+                       /* Channel B EQ - Low */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(21), buf, 5);
+                       /* Channel B EQ - Mid */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(22), buf, 6);
+                       /* Channel B EQ - Hi */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(23), buf, 7);
+
+                       break;
+
+               case 6:
+                       /* Channel A EQ - Filter */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(24), buf, 1);
+                       /* Channel A EQ - Low */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(25), buf, 2);
+                       /* Channel A EQ - Mid */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(26), buf, 3);
+                       /* Channel A EQ - Hi */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(27), buf, 4);
+                       /* Channel C EQ - Filter */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(28), buf, 5);
+                       /* Channel C EQ - Low */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(29), buf, 6);
+                       /* Channel C EQ - Mid */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(30), buf, 7);
+
+                       break;
+
+               case 7:
+                       /* Channel C EQ - Hi */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(31), buf, 1);
+                       /* FX1 - wet/dry */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(32), buf, 2);
+                       /* FX1 - 1 */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(33), buf, 3);
+                       /* FX1 - 2 */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(34), buf, 4);
+                       /* FX1 - 3 */
+                       snd_caiaq_input_report_abs(cdev, KONTROLS4_ABS(35), buf, 5);
+
+                       break;
+
+               default:
+                       dev_dbg(dev, "%s(): bogus block (id %d)\n",
+                               __func__, block_id);
+                       return;
+               }
+
+               len -= TKS4_MSGBLOCK_SIZE;
+               buf += TKS4_MSGBLOCK_SIZE;
+       }
+
+       input_sync(cdev->input_dev);
+}
+
+#define MASCHINE_MSGBLOCK_SIZE 2
+
+static void snd_usb_caiaq_maschine_dispatch(struct snd_usb_caiaqdev *cdev,
+                                       const unsigned char *buf,
+                                       unsigned int len)
+{
+       unsigned int i, pad_id;
+       __le16 *pressure = (__le16 *) buf;
+
+       for (i = 0; i < MASCHINE_PADS; i++) {
+               pad_id = le16_to_cpu(*pressure) >> 12;
+               input_report_abs(cdev->input_dev, MASCHINE_PAD(pad_id),
+                                le16_to_cpu(*pressure) & 0xfff);
+               pressure++;
+       }
+
+       input_sync(cdev->input_dev);
+}
+
+static void snd_usb_caiaq_ep4_reply_dispatch(struct urb *urb)
+{
+       struct snd_usb_caiaqdev *cdev = urb->context;
+       unsigned char *buf = urb->transfer_buffer;
+       struct device *dev = &urb->dev->dev;
+       int ret;
+
+       if (urb->status || !cdev || urb != cdev->ep4_in_urb)
+               return;
+
+       switch (cdev->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(cdev, buf + 1, 7);
+
+               if (buf[0] & 0x4)
+                       snd_caiaq_input_read_analog(cdev, buf + 8, 16);
+
+               break;
+
+       case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLS4):
+               snd_usb_caiaq_tks4_dispatch(cdev, buf, urb->actual_length);
+               break;
+
+       case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_MASCHINECONTROLLER):
+               if (urb->actual_length < (MASCHINE_PADS * MASCHINE_MSGBLOCK_SIZE))
+                       goto requeue;
+
+               snd_usb_caiaq_maschine_dispatch(cdev, buf, urb->actual_length);
+               break;
+       }
+
+requeue:
+       cdev->ep4_in_urb->actual_length = 0;
+       ret = usb_submit_urb(cdev->ep4_in_urb, GFP_ATOMIC);
+       if (ret < 0)
+               dev_err(dev, "unable to submit urb. OOM!?\n");
+}
+
+static int snd_usb_caiaq_input_open(struct input_dev *idev)
+{
+       struct snd_usb_caiaqdev *cdev = input_get_drvdata(idev);
+
+       if (!cdev)
+               return -EINVAL;
+
+       switch (cdev->chip.usb_id) {
+       case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLX1):
+       case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLS4):
+       case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_MASCHINECONTROLLER):
+               if (usb_submit_urb(cdev->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 *cdev = input_get_drvdata(idev);
+
+       if (!cdev)
+               return;
+
+       switch (cdev->chip.usb_id) {
+       case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLX1):
+       case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORKONTROLS4):
+       case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_MASCHINECONTROLLER):
+               usb_kill_urb(cdev->ep4_in_urb);
+               break;
+       }
+}
+
+void snd_usb_caiaq_input_dispatch(struct snd_usb_caiaqdev *cdev,
+                                 char *buf,
+                                 unsigned int len)
+{
+       if (!cdev->input_dev || len < 1)
+               return;
+
+       switch (buf[0]) {
+       case EP1_CMD_READ_ANALOG:
+               snd_caiaq_input_read_analog(cdev, buf + 1, len - 1);
+               break;
+       case EP1_CMD_READ_ERP:
+               snd_caiaq_input_read_erp(cdev, buf + 1, len - 1);
+               break;
+       case EP1_CMD_READ_IO:
+               snd_caiaq_input_read_io(cdev, buf + 1, len - 1);
+               break;
+       }
+}
+
+int snd_usb_caiaq_input_init(struct snd_usb_caiaqdev *cdev)
+{
+       struct usb_device *usb_dev = cdev->chip.dev;
+       struct input_dev *input;
+       int i, ret = 0;
+
+       input = input_allocate_device();
+       if (!input)
+               return -ENOMEM;
+
+       usb_make_path(usb_dev, cdev->phys, sizeof(cdev->phys));
+       strlcat(cdev->phys, "/input0", sizeof(cdev->phys));
+
+       input->name = cdev->product_name;
+       input->phys = cdev->phys;
+       usb_to_input_id(usb_dev, &input->id);
+       input->dev.parent = &usb_dev->dev;
+
+       input_set_drvdata(input, cdev);
+
+       switch (cdev->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(cdev->keycode) < sizeof(keycode_rk2));
+               memcpy(cdev->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(cdev, 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(cdev->keycode) < sizeof(keycode_rk3));
+               memcpy(cdev->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(cdev, 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(cdev->keycode) < sizeof(keycode_ak1));
+               memcpy(cdev->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(cdev, 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(cdev->keycode) < sizeof(keycode_kore));
+               memcpy(cdev->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(cdev, 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(cdev->keycode) < KONTROLX1_INPUTS);
+               for (i = 0; i < KONTROLX1_INPUTS; i++)
+                       cdev->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);
+
+               cdev->ep4_in_urb = usb_alloc_urb(0, GFP_KERNEL);
+               if (!cdev->ep4_in_urb) {
+                       ret = -ENOMEM;
+                       goto exit_free_idev;
+               }
+
+               usb_fill_bulk_urb(cdev->ep4_in_urb, usb_dev,
+                                 usb_rcvbulkpipe(usb_dev, 0x4),
+                                 cdev->ep4_in_buf, EP4_BUFSIZE,
+                                 snd_usb_caiaq_ep4_reply_dispatch, cdev);
+
+               snd_usb_caiaq_set_auto_msg(cdev, 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(cdev->keycode) < KONTROLS4_BUTTONS);
+               for (i = 0; i < KONTROLS4_BUTTONS; i++)
+                       cdev->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);
+
+               cdev->ep4_in_urb = usb_alloc_urb(0, GFP_KERNEL);
+               if (!cdev->ep4_in_urb) {
+                       ret = -ENOMEM;
+                       goto exit_free_idev;
+               }
+
+               usb_fill_bulk_urb(cdev->ep4_in_urb, usb_dev,
+                                 usb_rcvbulkpipe(usb_dev, 0x4),
+                                 cdev->ep4_in_buf, EP4_BUFSIZE,
+                                 snd_usb_caiaq_ep4_reply_dispatch, cdev);
+
+               snd_usb_caiaq_set_auto_msg(cdev, 1, 10, 5);
+
+               break;
+
+       case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_MASCHINECONTROLLER):
+               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_RX) | BIT_MASK(ABS_RY) |
+                       BIT_MASK(ABS_RZ);
+
+               BUILD_BUG_ON(sizeof(cdev->keycode) < sizeof(keycode_maschine));
+               memcpy(cdev->keycode, keycode_maschine, sizeof(keycode_maschine));
+               input->keycodemax = ARRAY_SIZE(keycode_maschine);
+
+               for (i = 0; i < MASCHINE_PADS; i++) {
+                       input->absbit[0] |= MASCHINE_PAD(i);
+                       input_set_abs_params(input, MASCHINE_PAD(i), 0, 0xfff, 5, 10);
+               }
+
+               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_RX, 0, 999, 0, 10);
+               input_set_abs_params(input, ABS_RY, 0, 999, 0, 10);
+               input_set_abs_params(input, ABS_RZ, 0, 999, 0, 10);
+
+               cdev->ep4_in_urb = usb_alloc_urb(0, GFP_KERNEL);
+               if (!cdev->ep4_in_urb) {
+                       ret = -ENOMEM;
+                       goto exit_free_idev;
+               }
+
+               usb_fill_bulk_urb(cdev->ep4_in_urb, usb_dev,
+                                 usb_rcvbulkpipe(usb_dev, 0x4),
+                                 cdev->ep4_in_buf, EP4_BUFSIZE,
+                                 snd_usb_caiaq_ep4_reply_dispatch, cdev);
+
+               snd_usb_caiaq_set_auto_msg(cdev, 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 = cdev->keycode;
+       input->keycodesize = sizeof(unsigned short);
+       for (i = 0; i < input->keycodemax; i++)
+               __set_bit(cdev->keycode[i], input->keybit);
+
+       cdev->input_dev = input;
+
+       ret = input_register_device(input);
+       if (ret < 0)
+               goto exit_free_idev;
+
+       return 0;
+
+exit_free_idev:
+       input_free_device(input);
+       cdev->input_dev = NULL;
+       return ret;
+}
+
+void snd_usb_caiaq_input_free(struct snd_usb_caiaqdev *cdev)
+{
+       if (!cdev || !cdev->input_dev)
+               return;
+
+       usb_kill_urb(cdev->ep4_in_urb);
+       usb_free_urb(cdev->ep4_in_urb);
+       cdev->ep4_in_urb = NULL;
+
+       input_unregister_device(cdev->input_dev);
+       cdev->input_dev = NULL;
+}