[ALSA] Add Native Instrument usb audio device support
Add snd-usb-caiaq driver to support caiaq usb-audio devices from
Native Instrument:
* Native Instruments RigKontrol2
* Native Instruments Kore Controller
* Native Instruments Audio Kontrol 1
* Native Instruments Audio 8 DJ
Signed-off-by: Daniel Mack <daniel@caiaq.org>
Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/usb/caiaq/caiaq-input.c b/sound/usb/caiaq/caiaq-input.c
new file mode 100644
index 0000000..3acd12d
--- /dev/null
+++ b/sound/usb/caiaq/caiaq-input.c
@@ -0,0 +1,246 @@
+/*
+ * 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/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/input.h>
+#include <linux/usb.h>
+#include <linux/spinlock.h>
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/rawmidi.h>
+#include <sound/pcm.h>
+#include "caiaq-device.h"
+#include "caiaq-input.h"
+
+#ifdef CONFIG_SND_USB_CAIAQ_INPUT
+
+static unsigned char keycode_ak1[] = { KEY_C, KEY_B, KEY_A };
+static unsigned char keycode_rk2[] = { KEY_1, KEY_2, KEY_3, KEY_4,
+ KEY_5, KEY_6, KEY_7 };
+
+#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 void snd_caiaq_input_read_analog(struct snd_usb_caiaqdev *dev,
+ const char *buf, unsigned int len)
+{
+ switch(dev->input_dev->id.product) {
+ case USB_PID_RIGKONTROL2:
+ input_report_abs(dev->input_dev, ABS_X, (buf[4] << 8) |buf[5]);
+ input_report_abs(dev->input_dev, ABS_Y, (buf[0] << 8) |buf[1]);
+ input_report_abs(dev->input_dev, ABS_Z, (buf[2] << 8) |buf[3]);
+ input_sync(dev->input_dev);
+ break;
+ }
+}
+
+static void snd_caiaq_input_read_erp(struct snd_usb_caiaqdev *dev,
+ const char *buf, unsigned int len)
+{
+ int i;
+
+ switch(dev->input_dev->id.product) {
+ case USB_PID_AK1:
+ i = decode_erp(buf[0], buf[1]);
+ input_report_abs(dev->input_dev, ABS_X, i);
+ input_sync(dev->input_dev);
+ break;
+ }
+}
+
+static void snd_caiaq_input_read_io(struct snd_usb_caiaqdev *dev,
+ char *buf, unsigned int len)
+{
+ int i;
+ unsigned char *keycode = dev->input_dev->keycode;
+
+ if (!keycode)
+ return;
+
+ if (dev->input_dev->id.product == USB_PID_RIGKONTROL2)
+ for (i=0; i<len; i++)
+ buf[i] = ~buf[i];
+
+ for (i=0; (i<dev->input_dev->keycodemax) && (i < len); i++)
+ input_report_key(dev->input_dev, keycode[i],
+ buf[i/8] & (1 << (i%8)));
+
+ input_sync(dev->input_dev);
+}
+
+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;
+
+ input = input_allocate_device();
+ if (!input)
+ return -ENOMEM;
+
+ input->name = dev->product_name;
+ input->id.bustype = BUS_USB;
+ input->id.vendor = usb_dev->descriptor.idVendor;
+ input->id.product = usb_dev->descriptor.idProduct;
+ input->id.version = usb_dev->descriptor.bcdDevice;
+
+ switch (dev->chip.usb_id) {
+ case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL2):
+ input->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+ input->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_Z);
+ input->keycode = keycode_rk2;
+ input->keycodesize = sizeof(char);
+ input->keycodemax = ARRAY_SIZE(keycode_rk2);
+ for (i=0; i<ARRAY_SIZE(keycode_rk2); i++)
+ set_bit(keycode_rk2[i], input->keybit);
+
+ 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_AK1):
+ input->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+ input->absbit[0] = BIT(ABS_X);
+ input->keycode = keycode_ak1;
+ input->keycodesize = sizeof(char);
+ input->keycodemax = ARRAY_SIZE(keycode_ak1);
+ for (i=0; i<ARRAY_SIZE(keycode_ak1); i++)
+ set_bit(keycode_ak1[i], input->keybit);
+
+ input_set_abs_params(input, ABS_X, 0, 999, 0, 10);
+ snd_usb_caiaq_set_auto_msg(dev, 1, 0, 5);
+ break;
+ default:
+ /* no input methods supported on this device */
+ input_free_device(input);
+ return 0;
+ }
+
+ ret = input_register_device(input);
+ if (ret < 0) {
+ input_free_device(input);
+ return ret;
+ }
+
+ dev->input_dev = input;
+ return 0;
+}
+
+void snd_usb_caiaq_input_free(struct snd_usb_caiaqdev *dev)
+{
+ if (!dev || !dev->input_dev)
+ return;
+
+ input_unregister_device(dev->input_dev);
+ input_free_device(dev->input_dev);
+ dev->input_dev = NULL;
+}
+
+#endif /* CONFIG_SND_USB_CAIAQ_INPUT */
+