sound/usb/caiaq/caiaq-device.c - kernel/msm-4.9 - Gitiles

 /*
  * caiaq.c: ALSA driver for caiaq/NativeInstruments devices
  *
  *   Copyright (c) 2007 Daniel Mack <daniel@caiaq.de>
  *                      Karsten Wiese <fzu@wemgehoertderstaat.de>
  *
  *   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/interrupt.h>
 #include <linux/usb.h>
 #include <linux/input.h>
 #include <linux/spinlock.h>
 #include <sound/core.h>
 #include <sound/initval.h>
 #include <sound/pcm.h>
 #include <sound/rawmidi.h>
 #include <sound/control.h>

 #include "caiaq-device.h"
 #include "caiaq-audio.h"
 #include "caiaq-midi.h"
 #include "caiaq-control.h"

 #ifdef CONFIG_SND_USB_CAIAQ_INPUT
 #include "caiaq-input.h"
 #endif

 MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
 MODULE_DESCRIPTION("caiaq USB audio, version 1.3.2");
 MODULE_LICENSE("GPL");
 MODULE_SUPPORTED_DEVICE("{{Native Instruments, RigKontrol2},"
 			 "{Native Instruments, RigKontrol3},"
 			 "{Native Instruments, Kore Controller},"
 			 "{Native Instruments, Kore Controller 2},"
 			 "{Native Instruments, Audio Kontrol 1}"
 			 "{Native Instruments, Audio 8 DJ}}");

 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-max */
 static char* id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* Id for this card */
 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
 static int snd_card_used[SNDRV_CARDS];

 module_param_array(index, int, NULL, 0444);
 MODULE_PARM_DESC(index, "Index value for the caiaq sound device");
 module_param_array(id, charp, NULL, 0444);
 MODULE_PARM_DESC(id, "ID string for the caiaq soundcard.");
 module_param_array(enable, bool, NULL, 0444);
 MODULE_PARM_DESC(enable, "Enable the caiaq soundcard.");

 enum {
 	SAMPLERATE_44100	= 0,
 	SAMPLERATE_48000	= 1,
 	SAMPLERATE_96000	= 2,
 	SAMPLERATE_192000	= 3,
 	SAMPLERATE_88200	= 4,
 	SAMPLERATE_INVALID	= 0xff
 };

 enum {
 	DEPTH_NONE	= 0,
 	DEPTH_16	= 1,
 	DEPTH_24	= 2,
 	DEPTH_32	= 3
 };

 static struct usb_device_id snd_usb_id_table[] = {
 	{
 		.match_flags =	USB_DEVICE_ID_MATCH_DEVICE,
 		.idVendor =	USB_VID_NATIVEINSTRUMENTS,
 		.idProduct =	USB_PID_RIGKONTROL2
 	},
 	{
 		.match_flags =	USB_DEVICE_ID_MATCH_DEVICE,
 		.idVendor =	USB_VID_NATIVEINSTRUMENTS,
 		.idProduct =	USB_PID_RIGKONTROL3
 	},
 	{
 		.match_flags =	USB_DEVICE_ID_MATCH_DEVICE,
 		.idVendor =	USB_VID_NATIVEINSTRUMENTS,
 		.idProduct =	USB_PID_KORECONTROLLER
 	},
 	{
 		.match_flags =	USB_DEVICE_ID_MATCH_DEVICE,
 		.idVendor =	USB_VID_NATIVEINSTRUMENTS,
 		.idProduct =	USB_PID_KORECONTROLLER2
 	},
 	{
 		.match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
 		.idVendor =     USB_VID_NATIVEINSTRUMENTS,
 		.idProduct =    USB_PID_AK1
 	},
 	{
 		.match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
 		.idVendor =     USB_VID_NATIVEINSTRUMENTS,
 		.idProduct =    USB_PID_AUDIO8DJ
 	},
 	{ /* terminator */ }
 };

 static void usb_ep1_command_reply_dispatch (struct urb* urb)
 {
 	int ret;
 	struct snd_usb_caiaqdev *dev = urb->context;
 	unsigned char *buf = urb->transfer_buffer;

 	if (urb->status || !dev) {
 		log("received EP1 urb->status = %i\n", urb->status);
 		return;
 	}

 	switch(buf[0]) {
 	case EP1_CMD_GET_DEVICE_INFO:
 	 	memcpy(&dev->spec, buf+1, sizeof(struct caiaq_device_spec));
 		dev->spec.fw_version = le16_to_cpu(dev->spec.fw_version);
 		debug("device spec (firmware %d): audio: %d in, %d out, "
 			"MIDI: %d in, %d out, data alignment %d\n",
 			dev->spec.fw_version,
 			dev->spec.num_analog_audio_in,
 			dev->spec.num_analog_audio_out,
 			dev->spec.num_midi_in,
 			dev->spec.num_midi_out,
 			dev->spec.data_alignment);

 		dev->spec_received++;
 		wake_up(&dev->ep1_wait_queue);
 		break;
 	case EP1_CMD_AUDIO_PARAMS:
 		dev->audio_parm_answer = buf[1];
 		wake_up(&dev->ep1_wait_queue);
 		break;
 	case EP1_CMD_MIDI_READ:
 		snd_usb_caiaq_midi_handle_input(dev, buf[1], buf + 3, buf[2]);
 		break;
 	case EP1_CMD_READ_IO:
 		if (dev->chip.usb_id ==
 			USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ)) {
 			if (urb->actual_length > sizeof(dev->control_state))
 				urb->actual_length = sizeof(dev->control_state);
 			memcpy(dev->control_state, buf + 1, urb->actual_length);
 			wake_up(&dev->ep1_wait_queue);
 			break;
 		}
 #ifdef CONFIG_SND_USB_CAIAQ_INPUT
 	case EP1_CMD_READ_ERP:
 	case EP1_CMD_READ_ANALOG:
 		snd_usb_caiaq_input_dispatch(dev, buf, urb->actual_length);
 #endif
 		break;
 	}

 	dev->ep1_in_urb.actual_length = 0;
 	ret = usb_submit_urb(&dev->ep1_in_urb, GFP_ATOMIC);
 	if (ret < 0)
 		log("unable to submit urb. OOM!?\n");
 }

 int snd_usb_caiaq_send_command(struct snd_usb_caiaqdev *dev,
 			       unsigned char command,
 			       const unsigned char *buffer,
 			       int len)
 {
 	int actual_len;
 	struct usb_device *usb_dev = dev->chip.dev;

 	if (!usb_dev)
 		return -EIO;

 	if (len > EP1_BUFSIZE - 1)
 		len = EP1_BUFSIZE - 1;

 	if (buffer && len > 0)
 		memcpy(dev->ep1_out_buf+1, buffer, len);

 	dev->ep1_out_buf[0] = command;
 	return usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, 1),
 			   dev->ep1_out_buf, len+1, &actual_len, 200);
 }

 int snd_usb_caiaq_set_audio_params (struct snd_usb_caiaqdev *dev,
 		   		    int rate, int depth, int bpp)
 {
 	int ret;
 	char tmp[5];

 	switch (rate) {
 	case 44100:	tmp[0] = SAMPLERATE_44100;   break;
 	case 48000:	tmp[0] = SAMPLERATE_48000;   break;
 	case 88200:	tmp[0] = SAMPLERATE_88200;   break;
 	case 96000:	tmp[0] = SAMPLERATE_96000;   break;
 	case 192000:	tmp[0] = SAMPLERATE_192000;  break;
 	default:	return -EINVAL;
 	}

 	switch (depth) {
 	case 16:	tmp[1] = DEPTH_16;   break;
 	case 24:	tmp[1] = DEPTH_24;   break;
 	default:	return -EINVAL;
 	}

 	tmp[2] = bpp & 0xff;
 	tmp[3] = bpp >> 8;
 	tmp[4] = 1; /* packets per microframe */

 	debug("setting audio params: %d Hz, %d bits, %d bpp\n",
 		rate, depth, bpp);

 	dev->audio_parm_answer = -1;
 	ret = snd_usb_caiaq_send_command(dev, EP1_CMD_AUDIO_PARAMS,
 					 tmp, sizeof(tmp));

 	if (ret)
 		return ret;

 	if (!wait_event_timeout(dev->ep1_wait_queue,
 	    dev->audio_parm_answer >= 0, HZ))
 		return -EPIPE;

 	if (dev->audio_parm_answer != 1)
 		debug("unable to set the device's audio params\n");

 	return dev->audio_parm_answer == 1 ? 0 : -EINVAL;
 }

 int snd_usb_caiaq_set_auto_msg (struct snd_usb_caiaqdev *dev,
 				int digital, int analog, int erp)
 {
 	char tmp[3] = { digital, analog, erp };
 	return snd_usb_caiaq_send_command(dev, EP1_CMD_AUTO_MSG,
 					  tmp, sizeof(tmp));
 }

 static void __devinit setup_card(struct snd_usb_caiaqdev *dev)
 {
 	int ret;
 	char val[4];

 	/* device-specific startup specials */
 	switch (dev->chip.usb_id) {
 	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL2):
 		/* RigKontrol2 - display centered dash ('-') */
 		val[0] = 0x00;
 		val[1] = 0x00;
 		val[2] = 0x01;
 		snd_usb_caiaq_send_command(dev, EP1_CMD_WRITE_IO, val, 3);
 		break;
 	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
 		/* RigKontrol2 - display two centered dashes ('--') */
 		val[0] = 0x00;
 		val[1] = 0x40;
 		val[2] = 0x40;
 		val[3] = 0x00;
 		snd_usb_caiaq_send_command(dev, EP1_CMD_WRITE_IO, val, 4);
 		break;
 	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
 		/* Audio Kontrol 1 - make USB-LED stop blinking */
 		val[0] = 0x00;
 		snd_usb_caiaq_send_command(dev, EP1_CMD_WRITE_IO, val, 1);
 		break;
 	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
 		/* Audio 8 DJ - trigger read of current settings */
 		dev->control_state[0] = 0xff;
 		snd_usb_caiaq_set_auto_msg(dev, 1, 0, 0);
 		snd_usb_caiaq_send_command(dev, EP1_CMD_READ_IO, NULL, 0);

 		if (!wait_event_timeout(dev->ep1_wait_queue,
 					dev->control_state[0] != 0xff, HZ))
 			return;

 		/* fix up some defaults */
 		if ((dev->control_state[1] != 2) ||
 		    (dev->control_state[2] != 3) ||
 		    (dev->control_state[4] != 2)) {
 			dev->control_state[1] = 2;
 			dev->control_state[2] = 3;
 			dev->control_state[4] = 2;
 			snd_usb_caiaq_send_command(dev,
 				EP1_CMD_WRITE_IO, dev->control_state, 6);
 		}

 		break;
 	}

 	if (dev->spec.num_analog_audio_out +
 	    dev->spec.num_analog_audio_in +
 	    dev->spec.num_digital_audio_out +
 	    dev->spec.num_digital_audio_in > 0) {
 		ret = snd_usb_caiaq_audio_init(dev);
 		if (ret < 0)
 			log("Unable to set up audio system (ret=%d)\n", ret);
 	}

 	if (dev->spec.num_midi_in +
 	    dev->spec.num_midi_out > 0) {
 		ret = snd_usb_caiaq_midi_init(dev);
 		if (ret < 0)
 			log("Unable to set up MIDI system (ret=%d)\n", ret);
 	}

 #ifdef CONFIG_SND_USB_CAIAQ_INPUT
 	ret = snd_usb_caiaq_input_init(dev);
 	if (ret < 0)
 		log("Unable to set up input system (ret=%d)\n", ret);
 #endif

 	/* finally, register the card and all its sub-instances */
 	ret = snd_card_register(dev->chip.card);
 	if (ret < 0) {
 		log("snd_card_register() returned %d\n", ret);
 		snd_card_free(dev->chip.card);
 	}

 	ret = snd_usb_caiaq_control_init(dev);
 	if (ret < 0)
 		log("Unable to set up control system (ret=%d)\n", ret);
 }

 static struct snd_card* create_card(struct usb_device* usb_dev)
 {
 	int devnum;
 	struct snd_card *card;
 	struct snd_usb_caiaqdev *dev;

 	for (devnum = 0; devnum < SNDRV_CARDS; devnum++)
 		if (enable[devnum] && !snd_card_used[devnum])
 			break;

 	if (devnum >= SNDRV_CARDS)
 		return NULL;

 	card = snd_card_new(index[devnum], id[devnum], THIS_MODULE,
 					sizeof(struct snd_usb_caiaqdev));
 	if (!card)
 		return NULL;

 	dev = caiaqdev(card);
 	dev->chip.dev = usb_dev;
 	dev->chip.card = card;
 	dev->chip.usb_id = USB_ID(usb_dev->descriptor.idVendor,
 					usb_dev->descriptor.idProduct);
 	spin_lock_init(&dev->spinlock);
 	snd_card_set_dev(card, &usb_dev->dev);

 	return card;
 }

 static int __devinit init_card(struct snd_usb_caiaqdev *dev)
 {
 	char *c;
 	struct usb_device *usb_dev = dev->chip.dev;
 	struct snd_card *card = dev->chip.card;
 	int err, len;

 	if (usb_set_interface(usb_dev, 0, 1) != 0) {
 		log("can't set alt interface.\n");
 		return -EIO;
 	}

 	usb_init_urb(&dev->ep1_in_urb);
 	usb_init_urb(&dev->midi_out_urb);

 	usb_fill_bulk_urb(&dev->ep1_in_urb, usb_dev,
 			  usb_rcvbulkpipe(usb_dev, 0x1),
 			  dev->ep1_in_buf, EP1_BUFSIZE,
 			  usb_ep1_command_reply_dispatch, dev);

 	usb_fill_bulk_urb(&dev->midi_out_urb, usb_dev,
 			  usb_sndbulkpipe(usb_dev, 0x1),
 			  dev->midi_out_buf, EP1_BUFSIZE,
 			  snd_usb_caiaq_midi_output_done, dev);

 	init_waitqueue_head(&dev->ep1_wait_queue);
 	init_waitqueue_head(&dev->prepare_wait_queue);

 	if (usb_submit_urb(&dev->ep1_in_urb, GFP_KERNEL) != 0)
 		return -EIO;

 	err = snd_usb_caiaq_send_command(dev, EP1_CMD_GET_DEVICE_INFO, NULL, 0);
 	if (err)
 		return err;

 	if (!wait_event_timeout(dev->ep1_wait_queue, dev->spec_received, HZ))
 		return -ENODEV;

 	usb_string(usb_dev, usb_dev->descriptor.iManufacturer,
 		   dev->vendor_name, CAIAQ_USB_STR_LEN);

 	usb_string(usb_dev, usb_dev->descriptor.iProduct,
 		   dev->product_name, CAIAQ_USB_STR_LEN);

 	usb_string(usb_dev, usb_dev->descriptor.iSerialNumber,
 		   dev->serial, CAIAQ_USB_STR_LEN);

 	/* terminate serial string at first white space occurence */
 	c = strchr(dev->serial, ' ');
 	if (c)
 		*c = '\0';

 	strcpy(card->driver, MODNAME);
 	strcpy(card->shortname, dev->product_name);

 	len = snprintf(card->longname, sizeof(card->longname),
 		       "%s %s (serial %s, ",
 		       dev->vendor_name, dev->product_name, dev->serial);

 	if (len < sizeof(card->longname) - 2)
 		len += usb_make_path(usb_dev, card->longname + len,
 				     sizeof(card->longname) - len);

 	card->longname[len++] = ')';
 	card->longname[len] = '\0';
 	setup_card(dev);
 	return 0;
 }

 static int __devinit snd_probe(struct usb_interface *intf,
 		     const struct usb_device_id *id)
 {
 	int ret;
 	struct snd_card *card;
 	struct usb_device *device = interface_to_usbdev(intf);

 	card = create_card(device);

 	if (!card)
 		return -ENOMEM;

 	dev_set_drvdata(&intf->dev, card);
 	ret = init_card(caiaqdev(card));
 	if (ret < 0) {
 		log("unable to init card! (ret=%d)\n", ret);
 		snd_card_free(card);
 		return ret;
 	}

 	return 0;
 }

 static void snd_disconnect(struct usb_interface *intf)
 {
 	struct snd_usb_caiaqdev *dev;
 	struct snd_card *card = dev_get_drvdata(&intf->dev);

 	debug("snd_disconnect(%p)\n", intf);

 	if (!card)
 		return;

 	dev = caiaqdev(card);
 	snd_card_disconnect(card);

 #ifdef CONFIG_SND_USB_CAIAQ_INPUT
 	snd_usb_caiaq_input_free(dev);
 #endif
 	snd_usb_caiaq_audio_free(dev);

 	usb_kill_urb(&dev->ep1_in_urb);
 	usb_kill_urb(&dev->midi_out_urb);

 	snd_card_free(card);
 	usb_reset_device(interface_to_usbdev(intf));
 }


 MODULE_DEVICE_TABLE(usb, snd_usb_id_table);
 static struct usb_driver snd_usb_driver = {
 	.name 		= MODNAME,
 	.probe 		= snd_probe,
 	.disconnect	= snd_disconnect,
 	.id_table 	= snd_usb_id_table,
 };

 static int __init snd_module_init(void)
 {
 	return usb_register(&snd_usb_driver);
 }

 static void __exit snd_module_exit(void)
 {
 	usb_deregister(&snd_usb_driver);
 }

 module_init(snd_module_init)
 module_exit(snd_module_exit)
	/*
	* caiaq.c: ALSA driver for caiaq/NativeInstruments devices
	*
	* Copyright (c) 2007 Daniel Mack <daniel@caiaq.de>
	* Karsten Wiese <fzu@wemgehoertderstaat.de>
	*
	* 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/interrupt.h>
	#include <linux/usb.h>
	#include <linux/input.h>
	#include <linux/spinlock.h>
	#include <sound/core.h>
	#include <sound/initval.h>
	#include <sound/pcm.h>
	#include <sound/rawmidi.h>
	#include <sound/control.h>

	#include "caiaq-device.h"
	#include "caiaq-audio.h"
	#include "caiaq-midi.h"
	#include "caiaq-control.h"

	#ifdef CONFIG_SND_USB_CAIAQ_INPUT
	#include "caiaq-input.h"
	#endif

	MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
	MODULE_DESCRIPTION("caiaq USB audio, version 1.3.2");
	MODULE_LICENSE("GPL");
	MODULE_SUPPORTED_DEVICE("{{Native Instruments, RigKontrol2},"
	"{Native Instruments, RigKontrol3},"
	"{Native Instruments, Kore Controller},"
	"{Native Instruments, Kore Controller 2},"
	"{Native Instruments, Audio Kontrol 1}"
	"{Native Instruments, Audio 8 DJ}}");

	static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-max */
	static char* id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* Id for this card */
	static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
	static int snd_card_used[SNDRV_CARDS];

	module_param_array(index, int, NULL, 0444);
	MODULE_PARM_DESC(index, "Index value for the caiaq sound device");
	module_param_array(id, charp, NULL, 0444);
	MODULE_PARM_DESC(id, "ID string for the caiaq soundcard.");
	module_param_array(enable, bool, NULL, 0444);
	MODULE_PARM_DESC(enable, "Enable the caiaq soundcard.");

	enum {
	SAMPLERATE_44100 = 0,
	SAMPLERATE_48000 = 1,
	SAMPLERATE_96000 = 2,
	SAMPLERATE_192000 = 3,
	SAMPLERATE_88200 = 4,
	SAMPLERATE_INVALID = 0xff
	};

	enum {
	DEPTH_NONE = 0,
	DEPTH_16 = 1,
	DEPTH_24 = 2,
	DEPTH_32 = 3
	};

	static struct usb_device_id snd_usb_id_table[] = {
	{
	.match_flags = USB_DEVICE_ID_MATCH_DEVICE,
	.idVendor = USB_VID_NATIVEINSTRUMENTS,
	.idProduct = USB_PID_RIGKONTROL2
	},
	{
	.match_flags = USB_DEVICE_ID_MATCH_DEVICE,
	.idVendor = USB_VID_NATIVEINSTRUMENTS,
	.idProduct = USB_PID_RIGKONTROL3
	},
	{
	.match_flags = USB_DEVICE_ID_MATCH_DEVICE,
	.idVendor = USB_VID_NATIVEINSTRUMENTS,
	.idProduct = USB_PID_KORECONTROLLER
	},
	{
	.match_flags = USB_DEVICE_ID_MATCH_DEVICE,
	.idVendor = USB_VID_NATIVEINSTRUMENTS,
	.idProduct = USB_PID_KORECONTROLLER2
	},
	{
	.match_flags = USB_DEVICE_ID_MATCH_DEVICE,
	.idVendor = USB_VID_NATIVEINSTRUMENTS,
	.idProduct = USB_PID_AK1
	},
	{
	.match_flags = USB_DEVICE_ID_MATCH_DEVICE,
	.idVendor = USB_VID_NATIVEINSTRUMENTS,
	.idProduct = USB_PID_AUDIO8DJ
	},
	{ /* terminator */ }
	};

	static void usb_ep1_command_reply_dispatch (struct urb* urb)
	{
	int ret;
	struct snd_usb_caiaqdev *dev = urb->context;
	unsigned char *buf = urb->transfer_buffer;

	if (urb->status \|\| !dev) {
	log("received EP1 urb->status = %i\n", urb->status);
	return;
	}

	switch(buf[0]) {
	case EP1_CMD_GET_DEVICE_INFO:
	memcpy(&dev->spec, buf+1, sizeof(struct caiaq_device_spec));
	dev->spec.fw_version = le16_to_cpu(dev->spec.fw_version);
	debug("device spec (firmware %d): audio: %d in, %d out, "
	"MIDI: %d in, %d out, data alignment %d\n",
	dev->spec.fw_version,
	dev->spec.num_analog_audio_in,
	dev->spec.num_analog_audio_out,
	dev->spec.num_midi_in,
	dev->spec.num_midi_out,
	dev->spec.data_alignment);

	dev->spec_received++;
	wake_up(&dev->ep1_wait_queue);
	break;
	case EP1_CMD_AUDIO_PARAMS:
	dev->audio_parm_answer = buf[1];
	wake_up(&dev->ep1_wait_queue);
	break;
	case EP1_CMD_MIDI_READ:
	snd_usb_caiaq_midi_handle_input(dev, buf[1], buf + 3, buf[2]);
	break;
	case EP1_CMD_READ_IO:
	if (dev->chip.usb_id ==
	USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ)) {
	if (urb->actual_length > sizeof(dev->control_state))
	urb->actual_length = sizeof(dev->control_state);
	memcpy(dev->control_state, buf + 1, urb->actual_length);
	wake_up(&dev->ep1_wait_queue);
	break;
	}
	#ifdef CONFIG_SND_USB_CAIAQ_INPUT
	case EP1_CMD_READ_ERP:
	case EP1_CMD_READ_ANALOG:
	snd_usb_caiaq_input_dispatch(dev, buf, urb->actual_length);
	#endif
	break;
	}

	dev->ep1_in_urb.actual_length = 0;
	ret = usb_submit_urb(&dev->ep1_in_urb, GFP_ATOMIC);
	if (ret < 0)
	log("unable to submit urb. OOM!?\n");
	}

	int snd_usb_caiaq_send_command(struct snd_usb_caiaqdev *dev,
	unsigned char command,
	const unsigned char *buffer,
	int len)
	{
	int actual_len;
	struct usb_device *usb_dev = dev->chip.dev;

	if (!usb_dev)
	return -EIO;

	if (len > EP1_BUFSIZE - 1)
	len = EP1_BUFSIZE - 1;

	if (buffer && len > 0)
	memcpy(dev->ep1_out_buf+1, buffer, len);

	dev->ep1_out_buf[0] = command;
	return usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, 1),
	dev->ep1_out_buf, len+1, &actual_len, 200);
	}

	int snd_usb_caiaq_set_audio_params (struct snd_usb_caiaqdev *dev,
	int rate, int depth, int bpp)
	{
	int ret;
	char tmp[5];

	switch (rate) {
	case 44100: tmp[0] = SAMPLERATE_44100; break;
	case 48000: tmp[0] = SAMPLERATE_48000; break;
	case 88200: tmp[0] = SAMPLERATE_88200; break;
	case 96000: tmp[0] = SAMPLERATE_96000; break;
	case 192000: tmp[0] = SAMPLERATE_192000; break;
	default: return -EINVAL;
	}

	switch (depth) {
	case 16: tmp[1] = DEPTH_16; break;
	case 24: tmp[1] = DEPTH_24; break;
	default: return -EINVAL;
	}

	tmp[2] = bpp & 0xff;
	tmp[3] = bpp >> 8;
	tmp[4] = 1; /* packets per microframe */

	debug("setting audio params: %d Hz, %d bits, %d bpp\n",
	rate, depth, bpp);

	dev->audio_parm_answer = -1;
	ret = snd_usb_caiaq_send_command(dev, EP1_CMD_AUDIO_PARAMS,
	tmp, sizeof(tmp));

	if (ret)
	return ret;

	if (!wait_event_timeout(dev->ep1_wait_queue,
	dev->audio_parm_answer >= 0, HZ))
	return -EPIPE;

	if (dev->audio_parm_answer != 1)
	debug("unable to set the device's audio params\n");

	return dev->audio_parm_answer == 1 ? 0 : -EINVAL;
	}

	int snd_usb_caiaq_set_auto_msg (struct snd_usb_caiaqdev *dev,
	int digital, int analog, int erp)
	{
	char tmp[3] = { digital, analog, erp };
	return snd_usb_caiaq_send_command(dev, EP1_CMD_AUTO_MSG,
	tmp, sizeof(tmp));
	}

	static void __devinit setup_card(struct snd_usb_caiaqdev *dev)
	{
	int ret;
	char val[4];

	/* device-specific startup specials */
	switch (dev->chip.usb_id) {
	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL2):
	/* RigKontrol2 - display centered dash ('-') */
	val[0] = 0x00;
	val[1] = 0x00;
	val[2] = 0x01;
	snd_usb_caiaq_send_command(dev, EP1_CMD_WRITE_IO, val, 3);
	break;
	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
	/* RigKontrol2 - display two centered dashes ('--') */
	val[0] = 0x00;
	val[1] = 0x40;
	val[2] = 0x40;
	val[3] = 0x00;
	snd_usb_caiaq_send_command(dev, EP1_CMD_WRITE_IO, val, 4);
	break;
	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
	/* Audio Kontrol 1 - make USB-LED stop blinking */
	val[0] = 0x00;
	snd_usb_caiaq_send_command(dev, EP1_CMD_WRITE_IO, val, 1);
	break;
	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
	/* Audio 8 DJ - trigger read of current settings */
	dev->control_state[0] = 0xff;
	snd_usb_caiaq_set_auto_msg(dev, 1, 0, 0);
	snd_usb_caiaq_send_command(dev, EP1_CMD_READ_IO, NULL, 0);

	if (!wait_event_timeout(dev->ep1_wait_queue,
	dev->control_state[0] != 0xff, HZ))
	return;

	/* fix up some defaults */
	if ((dev->control_state[1] != 2) \|\|
	(dev->control_state[2] != 3) \|\|
	(dev->control_state[4] != 2)) {
	dev->control_state[1] = 2;
	dev->control_state[2] = 3;
	dev->control_state[4] = 2;
	snd_usb_caiaq_send_command(dev,
	EP1_CMD_WRITE_IO, dev->control_state, 6);
	}

	break;
	}

	if (dev->spec.num_analog_audio_out +
	dev->spec.num_analog_audio_in +
	dev->spec.num_digital_audio_out +
	dev->spec.num_digital_audio_in > 0) {
	ret = snd_usb_caiaq_audio_init(dev);
	if (ret < 0)
	log("Unable to set up audio system (ret=%d)\n", ret);
	}

	if (dev->spec.num_midi_in +
	dev->spec.num_midi_out > 0) {
	ret = snd_usb_caiaq_midi_init(dev);
	if (ret < 0)
	log("Unable to set up MIDI system (ret=%d)\n", ret);
	}

	#ifdef CONFIG_SND_USB_CAIAQ_INPUT
	ret = snd_usb_caiaq_input_init(dev);
	if (ret < 0)
	log("Unable to set up input system (ret=%d)\n", ret);
	#endif

	/* finally, register the card and all its sub-instances */
	ret = snd_card_register(dev->chip.card);
	if (ret < 0) {
	log("snd_card_register() returned %d\n", ret);
	snd_card_free(dev->chip.card);
	}

	ret = snd_usb_caiaq_control_init(dev);
	if (ret < 0)
	log("Unable to set up control system (ret=%d)\n", ret);
	}

	static struct snd_card* create_card(struct usb_device* usb_dev)
	{
	int devnum;
	struct snd_card *card;
	struct snd_usb_caiaqdev *dev;

	for (devnum = 0; devnum < SNDRV_CARDS; devnum++)
	if (enable[devnum] && !snd_card_used[devnum])
	break;

	if (devnum >= SNDRV_CARDS)
	return NULL;

	card = snd_card_new(index[devnum], id[devnum], THIS_MODULE,
	sizeof(struct snd_usb_caiaqdev));
	if (!card)
	return NULL;

	dev = caiaqdev(card);
	dev->chip.dev = usb_dev;
	dev->chip.card = card;
	dev->chip.usb_id = USB_ID(usb_dev->descriptor.idVendor,
	usb_dev->descriptor.idProduct);
	spin_lock_init(&dev->spinlock);
	snd_card_set_dev(card, &usb_dev->dev);

	return card;
	}

	static int __devinit init_card(struct snd_usb_caiaqdev *dev)
	{
	char *c;
	struct usb_device *usb_dev = dev->chip.dev;
	struct snd_card *card = dev->chip.card;
	int err, len;

	if (usb_set_interface(usb_dev, 0, 1) != 0) {
	log("can't set alt interface.\n");
	return -EIO;
	}

	usb_init_urb(&dev->ep1_in_urb);
	usb_init_urb(&dev->midi_out_urb);

	usb_fill_bulk_urb(&dev->ep1_in_urb, usb_dev,
	usb_rcvbulkpipe(usb_dev, 0x1),
	dev->ep1_in_buf, EP1_BUFSIZE,
	usb_ep1_command_reply_dispatch, dev);

	usb_fill_bulk_urb(&dev->midi_out_urb, usb_dev,
	usb_sndbulkpipe(usb_dev, 0x1),
	dev->midi_out_buf, EP1_BUFSIZE,
	snd_usb_caiaq_midi_output_done, dev);

	init_waitqueue_head(&dev->ep1_wait_queue);
	init_waitqueue_head(&dev->prepare_wait_queue);

	if (usb_submit_urb(&dev->ep1_in_urb, GFP_KERNEL) != 0)
	return -EIO;

	err = snd_usb_caiaq_send_command(dev, EP1_CMD_GET_DEVICE_INFO, NULL, 0);
	if (err)
	return err;

	if (!wait_event_timeout(dev->ep1_wait_queue, dev->spec_received, HZ))
	return -ENODEV;

	usb_string(usb_dev, usb_dev->descriptor.iManufacturer,
	dev->vendor_name, CAIAQ_USB_STR_LEN);

	usb_string(usb_dev, usb_dev->descriptor.iProduct,
	dev->product_name, CAIAQ_USB_STR_LEN);

	usb_string(usb_dev, usb_dev->descriptor.iSerialNumber,
	dev->serial, CAIAQ_USB_STR_LEN);

	/* terminate serial string at first white space occurence */
	c = strchr(dev->serial, ' ');
	if (c)
	*c = '\0';

	strcpy(card->driver, MODNAME);
	strcpy(card->shortname, dev->product_name);

	len = snprintf(card->longname, sizeof(card->longname),
	"%s %s (serial %s, ",
	dev->vendor_name, dev->product_name, dev->serial);

	if (len < sizeof(card->longname) - 2)
	len += usb_make_path(usb_dev, card->longname + len,
	sizeof(card->longname) - len);

	card->longname[len++] = ')';
	card->longname[len] = '\0';
	setup_card(dev);
	return 0;
	}

	static int __devinit snd_probe(struct usb_interface *intf,
	const struct usb_device_id *id)
	{
	int ret;
	struct snd_card *card;
	struct usb_device *device = interface_to_usbdev(intf);

	card = create_card(device);

	if (!card)
	return -ENOMEM;

	dev_set_drvdata(&intf->dev, card);
	ret = init_card(caiaqdev(card));
	if (ret < 0) {
	log("unable to init card! (ret=%d)\n", ret);
	snd_card_free(card);
	return ret;
	}

	return 0;
	}

	static void snd_disconnect(struct usb_interface *intf)
	{
	struct snd_usb_caiaqdev *dev;
	struct snd_card *card = dev_get_drvdata(&intf->dev);

	debug("snd_disconnect(%p)\n", intf);

	if (!card)
	return;

	dev = caiaqdev(card);
	snd_card_disconnect(card);

	#ifdef CONFIG_SND_USB_CAIAQ_INPUT
	snd_usb_caiaq_input_free(dev);
	#endif
	snd_usb_caiaq_audio_free(dev);

	usb_kill_urb(&dev->ep1_in_urb);
	usb_kill_urb(&dev->midi_out_urb);

	snd_card_free(card);
	usb_reset_device(interface_to_usbdev(intf));
	}


	MODULE_DEVICE_TABLE(usb, snd_usb_id_table);
	static struct usb_driver snd_usb_driver = {
	.name = MODNAME,
	.probe = snd_probe,
	.disconnect = snd_disconnect,
	.id_table = snd_usb_id_table,
	};

	static int __init snd_module_init(void)
	{
	return usb_register(&snd_usb_driver);
	}

	static void __exit snd_module_exit(void)
	{
	usb_deregister(&snd_usb_driver);
	}

	module_init(snd_module_init)
	module_exit(snd_module_exit)