linux/sound/usb/caiaq/caiaq-input.c
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   1/*
   2 *   Copyright (c) 2006,2007 Daniel Mack, Tim Ruetz
   3 *
   4 *   This program is free software; you can redistribute it and/or modify
   5 *   it under the terms of the GNU General Public License as published by
   6 *   the Free Software Foundation; either version 2 of the License, or
   7 *   (at your option) any later version.
   8 *
   9 *   This program is distributed in the hope that it will be useful,
  10 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 *   GNU General Public License for more details.
  13 *
  14 *   You should have received a copy of the GNU General Public License
  15 *   along with this program; if not, write to the Free Software
  16 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  17*/
  18
  19#include <linux/init.h>
  20#include <linux/module.h>
  21#include <linux/moduleparam.h>
  22#include <linux/input.h>
  23#include <linux/usb.h>
  24#include <linux/usb/input.h>
  25#include <linux/spinlock.h>
  26#include <sound/core.h>
  27#include <sound/rawmidi.h>
  28#include <sound/pcm.h>
  29#include "caiaq-device.h"
  30#include "caiaq-input.h"
  31
  32static unsigned short keycode_ak1[] =  { KEY_C, KEY_B, KEY_A };
  33static unsigned short keycode_rk2[] =  { KEY_1, KEY_2, KEY_3, KEY_4,
  34                                         KEY_5, KEY_6, KEY_7 };
  35static unsigned short keycode_rk3[] =  { KEY_1, KEY_2, KEY_3, KEY_4,
  36                                         KEY_5, KEY_6, KEY_7, KEY_5, KEY_6 };
  37
  38static unsigned short keycode_kore[] = {
  39        KEY_FN_F1,      /* "menu"               */
  40        KEY_FN_F7,      /* "lcd backlight       */
  41        KEY_FN_F2,      /* "control"            */
  42        KEY_FN_F3,      /* "enter"              */
  43        KEY_FN_F4,      /* "view"               */
  44        KEY_FN_F5,      /* "esc"                */
  45        KEY_FN_F6,      /* "sound"              */
  46        KEY_FN_F8,      /* array spacer, never triggered. */
  47        KEY_RIGHT,
  48        KEY_DOWN,
  49        KEY_UP,
  50        KEY_LEFT,
  51        KEY_SOUND,      /* "listen"             */
  52        KEY_RECORD,
  53        KEY_PLAYPAUSE,
  54        KEY_STOP,
  55        BTN_4,          /* 8 softkeys */
  56        BTN_3,
  57        BTN_2,
  58        BTN_1,
  59        BTN_8,
  60        BTN_7,
  61        BTN_6,
  62        BTN_5,
  63        KEY_BRL_DOT4,   /* touch sensitive knobs */
  64        KEY_BRL_DOT3,
  65        KEY_BRL_DOT2,
  66        KEY_BRL_DOT1,
  67        KEY_BRL_DOT8,
  68        KEY_BRL_DOT7,
  69        KEY_BRL_DOT6,
  70        KEY_BRL_DOT5
  71};
  72
  73#define DEG90           (range / 2)
  74#define DEG180          (range)
  75#define DEG270          (DEG90 + DEG180)
  76#define DEG360          (DEG180 * 2)
  77#define HIGH_PEAK       (268)
  78#define LOW_PEAK        (-7)
  79
  80/* some of these devices have endless rotation potentiometers
  81 * built in which use two tapers, 90 degrees phase shifted.
  82 * this algorithm decodes them to one single value, ranging
  83 * from 0 to 999 */
  84static unsigned int decode_erp(unsigned char a, unsigned char b)
  85{
  86        int weight_a, weight_b;
  87        int pos_a, pos_b;
  88        int ret;
  89        int range = HIGH_PEAK - LOW_PEAK;
  90        int mid_value = (HIGH_PEAK + LOW_PEAK) / 2;
  91
  92        weight_b = abs(mid_value - a) - (range / 2 - 100) / 2;
  93
  94        if (weight_b < 0)
  95                weight_b = 0;
  96
  97        if (weight_b > 100)
  98                weight_b = 100;
  99
 100        weight_a = 100 - weight_b;
 101
 102        if (a < mid_value) {
 103                /* 0..90 and 270..360 degrees */
 104                pos_b = b - LOW_PEAK + DEG270;
 105                if (pos_b >= DEG360)
 106                        pos_b -= DEG360;
 107        } else
 108                /* 90..270 degrees */
 109                pos_b = HIGH_PEAK - b + DEG90;
 110
 111
 112        if (b > mid_value)
 113                /* 0..180 degrees */
 114                pos_a = a - LOW_PEAK;
 115        else
 116                /* 180..360 degrees */
 117                pos_a = HIGH_PEAK - a + DEG180;
 118
 119        /* interpolate both slider values, depending on weight factors */
 120        /* 0..99 x DEG360 */
 121        ret = pos_a * weight_a + pos_b * weight_b;
 122
 123        /* normalize to 0..999 */
 124        ret *= 10;
 125        ret /= DEG360;
 126
 127        if (ret < 0)
 128                ret += 1000;
 129
 130        if (ret >= 1000)
 131                ret -= 1000;
 132
 133        return ret;
 134}
 135
 136#undef DEG90
 137#undef DEG180
 138#undef DEG270
 139#undef DEG360
 140#undef HIGH_PEAK
 141#undef LOW_PEAK
 142
 143
 144static void snd_caiaq_input_read_analog(struct snd_usb_caiaqdev *dev,
 145                                        const unsigned char *buf,
 146                                        unsigned int len)
 147{
 148        struct input_dev *input_dev = dev->input_dev;
 149
 150        switch (dev->chip.usb_id) {
 151        case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL2):
 152                input_report_abs(input_dev, ABS_X, (buf[4] << 8) | buf[5]);
 153                input_report_abs(input_dev, ABS_Y, (buf[0] << 8) | buf[1]);
 154                input_report_abs(input_dev, ABS_Z, (buf[2] << 8) | buf[3]);
 155                input_sync(input_dev);
 156                break;
 157        case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
 158                input_report_abs(input_dev, ABS_X, (buf[0] << 8) | buf[1]);
 159                input_report_abs(input_dev, ABS_Y, (buf[2] << 8) | buf[3]);
 160                input_report_abs(input_dev, ABS_Z, (buf[4] << 8) | buf[5]);
 161                input_sync(input_dev);
 162                break;
 163        case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER):
 164        case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER2):
 165                input_report_abs(input_dev, ABS_X, (buf[0] << 8) | buf[1]);
 166                input_report_abs(input_dev, ABS_Y, (buf[2] << 8) | buf[3]);
 167                input_report_abs(input_dev, ABS_Z, (buf[4] << 8) | buf[5]);
 168                input_sync(input_dev);
 169                break;
 170        }
 171}
 172
 173static void snd_caiaq_input_read_erp(struct snd_usb_caiaqdev *dev,
 174                                     const char *buf, unsigned int len)
 175{
 176        struct input_dev *input_dev = dev->input_dev;
 177        int i;
 178
 179        switch (dev->chip.usb_id) {
 180        case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
 181                i = decode_erp(buf[0], buf[1]);
 182                input_report_abs(input_dev, ABS_X, i);
 183                input_sync(input_dev);
 184                break;
 185        case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER):
 186        case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER2):
 187                i = decode_erp(buf[7], buf[5]);
 188                input_report_abs(input_dev, ABS_HAT0X, i);
 189                i = decode_erp(buf[12], buf[14]);
 190                input_report_abs(input_dev, ABS_HAT0Y, i);
 191                i = decode_erp(buf[15], buf[13]);
 192                input_report_abs(input_dev, ABS_HAT1X, i);
 193                i = decode_erp(buf[0], buf[2]);
 194                input_report_abs(input_dev, ABS_HAT1Y, i);
 195                i = decode_erp(buf[3], buf[1]);
 196                input_report_abs(input_dev, ABS_HAT2X, i);
 197                i = decode_erp(buf[8], buf[10]);
 198                input_report_abs(input_dev, ABS_HAT2Y, i);
 199                i = decode_erp(buf[11], buf[9]);
 200                input_report_abs(input_dev, ABS_HAT3X, i);
 201                i = decode_erp(buf[4], buf[6]);
 202                input_report_abs(input_dev, ABS_HAT3Y, i);
 203                input_sync(input_dev);
 204                break;
 205        }
 206}
 207
 208static void snd_caiaq_input_read_io(struct snd_usb_caiaqdev *dev,
 209                                    char *buf, unsigned int len)
 210{
 211        struct input_dev *input_dev = dev->input_dev;
 212        unsigned short *keycode = input_dev->keycode;
 213        int i;
 214
 215        if (!keycode)
 216                return;
 217
 218        if (input_dev->id.product == USB_PID_RIGKONTROL2)
 219                for (i = 0; i < len; i++)
 220                        buf[i] = ~buf[i];
 221
 222        for (i = 0; i < input_dev->keycodemax && i < len * 8; i++)
 223                input_report_key(input_dev, keycode[i],
 224                                 buf[i / 8] & (1 << (i % 8)));
 225
 226        if (dev->chip.usb_id ==
 227                USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER) ||
 228            dev->chip.usb_id ==
 229                USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER2))
 230                input_report_abs(dev->input_dev, ABS_MISC, 255 - buf[4]);
 231
 232        input_sync(input_dev);
 233}
 234
 235void snd_usb_caiaq_input_dispatch(struct snd_usb_caiaqdev *dev,
 236                                  char *buf,
 237                                  unsigned int len)
 238{
 239        if (!dev->input_dev || len < 1)
 240                return;
 241
 242        switch (buf[0]) {
 243        case EP1_CMD_READ_ANALOG:
 244                snd_caiaq_input_read_analog(dev, buf + 1, len - 1);
 245                break;
 246        case EP1_CMD_READ_ERP:
 247                snd_caiaq_input_read_erp(dev, buf + 1, len - 1);
 248                break;
 249        case EP1_CMD_READ_IO:
 250                snd_caiaq_input_read_io(dev, buf + 1, len - 1);
 251                break;
 252        }
 253}
 254
 255int snd_usb_caiaq_input_init(struct snd_usb_caiaqdev *dev)
 256{
 257        struct usb_device *usb_dev = dev->chip.dev;
 258        struct input_dev *input;
 259        int i, ret;
 260
 261        input = input_allocate_device();
 262        if (!input)
 263                return -ENOMEM;
 264
 265        usb_make_path(usb_dev, dev->phys, sizeof(dev->phys));
 266        strlcat(dev->phys, "/input0", sizeof(dev->phys));
 267
 268        input->name = dev->product_name;
 269        input->phys = dev->phys;
 270        usb_to_input_id(usb_dev, &input->id);
 271        input->dev.parent = &usb_dev->dev;
 272
 273        switch (dev->chip.usb_id) {
 274        case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL2):
 275                input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 276                input->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) |
 277                        BIT_MASK(ABS_Z);
 278                BUILD_BUG_ON(sizeof(dev->keycode) < sizeof(keycode_rk2));
 279                memcpy(dev->keycode, keycode_rk2, sizeof(keycode_rk2));
 280                input->keycodemax = ARRAY_SIZE(keycode_rk2);
 281                input_set_abs_params(input, ABS_X, 0, 4096, 0, 10);
 282                input_set_abs_params(input, ABS_Y, 0, 4096, 0, 10);
 283                input_set_abs_params(input, ABS_Z, 0, 4096, 0, 10);
 284                snd_usb_caiaq_set_auto_msg(dev, 1, 10, 0);
 285                break;
 286        case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
 287                input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 288                input->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) |
 289                        BIT_MASK(ABS_Z);
 290                BUILD_BUG_ON(sizeof(dev->keycode) < sizeof(keycode_rk3));
 291                memcpy(dev->keycode, keycode_rk3, sizeof(keycode_rk3));
 292                input->keycodemax = ARRAY_SIZE(keycode_rk3);
 293                input_set_abs_params(input, ABS_X, 0, 1024, 0, 10);
 294                input_set_abs_params(input, ABS_Y, 0, 1024, 0, 10);
 295                input_set_abs_params(input, ABS_Z, 0, 1024, 0, 10);
 296                snd_usb_caiaq_set_auto_msg(dev, 1, 10, 0);
 297                break;
 298        case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
 299                input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 300                input->absbit[0] = BIT_MASK(ABS_X);
 301                BUILD_BUG_ON(sizeof(dev->keycode) < sizeof(keycode_ak1));
 302                memcpy(dev->keycode, keycode_ak1, sizeof(keycode_ak1));
 303                input->keycodemax = ARRAY_SIZE(keycode_ak1);
 304                input_set_abs_params(input, ABS_X, 0, 999, 0, 10);
 305                snd_usb_caiaq_set_auto_msg(dev, 1, 0, 5);
 306                break;
 307        case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER):
 308        case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_KORECONTROLLER2):
 309                input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 310                input->absbit[0] = BIT_MASK(ABS_HAT0X) | BIT_MASK(ABS_HAT0Y) |
 311                                   BIT_MASK(ABS_HAT1X) | BIT_MASK(ABS_HAT1Y) |
 312                                   BIT_MASK(ABS_HAT2X) | BIT_MASK(ABS_HAT2Y) |
 313                                   BIT_MASK(ABS_HAT3X) | BIT_MASK(ABS_HAT3Y) |
 314                                   BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) |
 315                                   BIT_MASK(ABS_Z);
 316                input->absbit[BIT_WORD(ABS_MISC)] |= BIT_MASK(ABS_MISC);
 317                BUILD_BUG_ON(sizeof(dev->keycode) < sizeof(keycode_kore));
 318                memcpy(dev->keycode, keycode_kore, sizeof(keycode_kore));
 319                input->keycodemax = ARRAY_SIZE(keycode_kore);
 320                input_set_abs_params(input, ABS_HAT0X, 0, 999, 0, 10);
 321                input_set_abs_params(input, ABS_HAT0Y, 0, 999, 0, 10);
 322                input_set_abs_params(input, ABS_HAT1X, 0, 999, 0, 10);
 323                input_set_abs_params(input, ABS_HAT1Y, 0, 999, 0, 10);
 324                input_set_abs_params(input, ABS_HAT2X, 0, 999, 0, 10);
 325                input_set_abs_params(input, ABS_HAT2Y, 0, 999, 0, 10);
 326                input_set_abs_params(input, ABS_HAT3X, 0, 999, 0, 10);
 327                input_set_abs_params(input, ABS_HAT3Y, 0, 999, 0, 10);
 328                input_set_abs_params(input, ABS_X, 0, 4096, 0, 10);
 329                input_set_abs_params(input, ABS_Y, 0, 4096, 0, 10);
 330                input_set_abs_params(input, ABS_Z, 0, 4096, 0, 10);
 331                input_set_abs_params(input, ABS_MISC, 0, 255, 0, 1);
 332                snd_usb_caiaq_set_auto_msg(dev, 1, 10, 5);
 333                break;
 334        default:
 335                /* no input methods supported on this device */
 336                input_free_device(input);
 337                return 0;
 338        }
 339
 340        input->keycode = dev->keycode;
 341        input->keycodesize = sizeof(unsigned short);
 342        for (i = 0; i < input->keycodemax; i++)
 343                __set_bit(dev->keycode[i], input->keybit);
 344
 345        ret = input_register_device(input);
 346        if (ret < 0) {
 347                input_free_device(input);
 348                return ret;
 349        }
 350
 351        dev->input_dev = input;
 352        return 0;
 353}
 354
 355void snd_usb_caiaq_input_free(struct snd_usb_caiaqdev *dev)
 356{
 357        if (!dev || !dev->input_dev)
 358                return;
 359
 360        input_unregister_device(dev->input_dev);
 361        dev->input_dev = NULL;
 362}
 363
 364