[net-next-2.6.git] / sound / pci / ca0106 / ca_midi.c

/* 
 *  Copyright 10/16/2005 Tilman Kranz <tilde@tk-sls.de>
 *  Creative Audio MIDI, for the CA0106 Driver
 *  Version: 0.0.1
 *
 *  Changelog:
 *    Implementation is based on mpu401 and emu10k1x and
 *    tested with ca0106.
 *    mpu401: Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *    emu10k1x: Copyright (c) by Francisco Moraes <fmoraes@nc.rr.com>
 *
 *   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/spinlock.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/rawmidi.h>

#include "ca_midi.h"

#define ca_midi_write_data(midi, data)	midi->write(midi, data, 0)
#define ca_midi_write_cmd(midi, data)	midi->write(midi, data, 1)
#define ca_midi_read_data(midi)		midi->read(midi, 0)
#define ca_midi_read_stat(midi)		midi->read(midi, 1)
#define ca_midi_input_avail(midi)	(!(ca_midi_read_stat(midi) & midi->input_avail))
#define ca_midi_output_ready(midi)	(!(ca_midi_read_stat(midi) & midi->output_ready))

static void ca_midi_clear_rx(struct snd_ca_midi *midi)
{
	int timeout = 100000;
	for (; timeout > 0 && ca_midi_input_avail(midi); timeout--)
		ca_midi_read_data(midi);
#ifdef CONFIG_SND_DEBUG
	if (timeout <= 0)
		snd_printk(KERN_ERR "ca_midi_clear_rx: timeout (status = 0x%x)\n",
			   ca_midi_read_stat(midi));
#endif
}

static void ca_midi_interrupt(struct snd_ca_midi *midi, unsigned int status)
{
	unsigned char byte;

	if (midi->rmidi == NULL) {
		midi->interrupt_disable(midi,midi->tx_enable | midi->rx_enable);
		return;
	}

	spin_lock(&midi->input_lock);
	if ((status & midi->ipr_rx) && ca_midi_input_avail(midi)) {
		if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
			ca_midi_clear_rx(midi);
		} else {
			byte = ca_midi_read_data(midi);
			if(midi->substream_input)
				snd_rawmidi_receive(midi->substream_input, &byte, 1);


		}
	}
	spin_unlock(&midi->input_lock);

	spin_lock(&midi->output_lock);
	if ((status & midi->ipr_tx) && ca_midi_output_ready(midi)) {
		if (midi->substream_output &&
		    snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
			ca_midi_write_data(midi, byte);
		} else {
			midi->interrupt_disable(midi,midi->tx_enable);
		}
	}
	spin_unlock(&midi->output_lock);

}

static void ca_midi_cmd(struct snd_ca_midi *midi, unsigned char cmd, int ack)
{
	unsigned long flags;
	int timeout, ok;

	spin_lock_irqsave(&midi->input_lock, flags);
	ca_midi_write_data(midi, 0x00);
	/* ca_midi_clear_rx(midi); */

	ca_midi_write_cmd(midi, cmd);
	if (ack) {
		ok = 0;
		timeout = 10000;
		while (!ok && timeout-- > 0) {
			if (ca_midi_input_avail(midi)) {
				if (ca_midi_read_data(midi) == midi->ack)
					ok = 1;
			}
		}
		if (!ok && ca_midi_read_data(midi) == midi->ack)
			ok = 1;
	} else {
		ok = 1;
	}
	spin_unlock_irqrestore(&midi->input_lock, flags);
	if (!ok)
		snd_printk(KERN_ERR "ca_midi_cmd: 0x%x failed at 0x%x (status = 0x%x, data = 0x%x)!!!\n",
			   cmd,
			   midi->get_dev_id_port(midi->dev_id),
			   ca_midi_read_stat(midi),
			   ca_midi_read_data(midi));
}

static int ca_midi_input_open(struct snd_rawmidi_substream *substream)
{
	struct snd_ca_midi *midi = substream->rmidi->private_data;
	unsigned long flags;
	
	snd_assert(midi->dev_id, return -ENXIO);
	spin_lock_irqsave(&midi->open_lock, flags);
	midi->midi_mode |= CA_MIDI_MODE_INPUT;
	midi->substream_input = substream;
	if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) {
		spin_unlock_irqrestore(&midi->open_lock, flags);
		ca_midi_cmd(midi, midi->reset, 1);
		ca_midi_cmd(midi, midi->enter_uart, 1);
	} else {
		spin_unlock_irqrestore(&midi->open_lock, flags);
	}
	return 0;
}

static int ca_midi_output_open(struct snd_rawmidi_substream *substream)
{
	struct snd_ca_midi *midi = substream->rmidi->private_data;
	unsigned long flags;

	snd_assert(midi->dev_id, return -ENXIO);
	spin_lock_irqsave(&midi->open_lock, flags);
	midi->midi_mode |= CA_MIDI_MODE_OUTPUT;
	midi->substream_output = substream;
	if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
		spin_unlock_irqrestore(&midi->open_lock, flags);
		ca_midi_cmd(midi, midi->reset, 1);
		ca_midi_cmd(midi, midi->enter_uart, 1);
	} else {
		spin_unlock_irqrestore(&midi->open_lock, flags);
	}
	return 0;
}

static int ca_midi_input_close(struct snd_rawmidi_substream *substream)
{
	struct snd_ca_midi *midi = substream->rmidi->private_data;
	unsigned long flags;

	snd_assert(midi->dev_id, return -ENXIO);
	spin_lock_irqsave(&midi->open_lock, flags);
	midi->interrupt_disable(midi,midi->rx_enable);
	midi->midi_mode &= ~CA_MIDI_MODE_INPUT;
	midi->substream_input = NULL;
	if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) {
		spin_unlock_irqrestore(&midi->open_lock, flags);
		ca_midi_cmd(midi, midi->reset, 0);
	} else {
		spin_unlock_irqrestore(&midi->open_lock, flags);
	}
	return 0;
}

static int ca_midi_output_close(struct snd_rawmidi_substream *substream)
{
	struct snd_ca_midi *midi = substream->rmidi->private_data;
	unsigned long flags;
	snd_assert(midi->dev_id, return -ENXIO);
	
	spin_lock_irqsave(&midi->open_lock, flags);

	midi->interrupt_disable(midi,midi->tx_enable);
	midi->midi_mode &= ~CA_MIDI_MODE_OUTPUT;
	midi->substream_output = NULL;
	
	if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
		spin_unlock_irqrestore(&midi->open_lock, flags);
		ca_midi_cmd(midi, midi->reset, 0);
	} else {
		spin_unlock_irqrestore(&midi->open_lock, flags);
	}
	return 0;
}

static void ca_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
{
	struct snd_ca_midi *midi = substream->rmidi->private_data;
	snd_assert(midi->dev_id, return);

	if (up) {
		midi->interrupt_enable(midi,midi->rx_enable);
	} else {
		midi->interrupt_disable(midi, midi->rx_enable);
	}
}

static void ca_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
{
	struct snd_ca_midi *midi = substream->rmidi->private_data;
	unsigned long flags;

	snd_assert(midi->dev_id, return);

	if (up) {
		int max = 4;
		unsigned char byte;

		spin_lock_irqsave(&midi->output_lock, flags);
	
		/* try to send some amount of bytes here before interrupts */
		while (max > 0) {
			if (ca_midi_output_ready(midi)) {
				if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT) ||
				    snd_rawmidi_transmit(substream, &byte, 1) != 1) {
					/* no more data */
					spin_unlock_irqrestore(&midi->output_lock, flags);
					return;
				}
				ca_midi_write_data(midi, byte);
				max--;
			} else {
				break;
			}
		}

		spin_unlock_irqrestore(&midi->output_lock, flags);
		midi->interrupt_enable(midi,midi->tx_enable);

	} else {
		midi->interrupt_disable(midi,midi->tx_enable);
	}
}

static struct snd_rawmidi_ops ca_midi_output =
{
	.open =		ca_midi_output_open,
	.close =	ca_midi_output_close,
	.trigger =	ca_midi_output_trigger,
};

static struct snd_rawmidi_ops ca_midi_input =
{
	.open =		ca_midi_input_open,
	.close =	ca_midi_input_close,
	.trigger =	ca_midi_input_trigger,
};

static void ca_midi_free(struct snd_ca_midi *midi)
{
	midi->interrupt = NULL;
	midi->interrupt_enable = NULL;
	midi->interrupt_disable = NULL;
	midi->read = NULL;
	midi->write = NULL;
	midi->get_dev_id_card = NULL;
	midi->get_dev_id_port = NULL;
	midi->rmidi = NULL;
}

static void ca_rmidi_free(struct snd_rawmidi *rmidi)
{
	ca_midi_free(rmidi->private_data);
}

int __devinit ca_midi_init(void *dev_id, struct snd_ca_midi *midi, int device, char *name)
{
	struct snd_rawmidi *rmidi;
	int err;

	if ((err = snd_rawmidi_new(midi->get_dev_id_card(midi->dev_id), name, device, 1, 1, &rmidi)) < 0)
		return err;

	midi->dev_id = dev_id;
	midi->interrupt = ca_midi_interrupt;

	spin_lock_init(&midi->open_lock);
	spin_lock_init(&midi->input_lock);
	spin_lock_init(&midi->output_lock);

	strcpy(rmidi->name, name);
	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &ca_midi_output);
	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &ca_midi_input);
	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT |
	                     SNDRV_RAWMIDI_INFO_INPUT |
	                     SNDRV_RAWMIDI_INFO_DUPLEX;
	rmidi->private_data = midi;
	rmidi->private_free = ca_rmidi_free;
	
	midi->rmidi = rmidi;
	return 0;
}
Commit	Line	Data
8a5afd29 JCD	1	/*
	2	* Copyright 10/16/2005 Tilman Kranz <tilde@tk-sls.de>
	3	* Creative Audio MIDI, for the CA0106 Driver
	4	* Version: 0.0.1
	5	*
	6	* Changelog:
	7	* Implementation is based on mpu401 and emu10k1x and
	8	* tested with ca0106.
c1017a4c	9	* mpu401: Copyright (c) by Jaroslav Kysela <perex@perex.cz>
7b4260f2	10	* emu10k1x: Copyright (c) by Francisco Moraes <fmoraes@nc.rr.com>
8a5afd29 JCD	11	*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License as published by
	14	* the Free Software Foundation; either version 2 of the License, or
	15	* (at your option) any later version.
	16	*
	17	* This program is distributed in the hope that it will be useful,
	18	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	* GNU General Public License for more details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, write to the Free Software
	24	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	25	*
	26	*
	27	*/
	28
	29	#include <linux/spinlock.h>
	30	#include <sound/driver.h>
	31	#include <sound/core.h>
	32	#include <sound/rawmidi.h>
	33
	34	#include "ca_midi.h"
	35
	36	#define ca_midi_write_data(midi, data) midi->write(midi, data, 0)
	37	#define ca_midi_write_cmd(midi, data) midi->write(midi, data, 1)
	38	#define ca_midi_read_data(midi) midi->read(midi, 0)
	39	#define ca_midi_read_stat(midi) midi->read(midi, 1)
	40	#define ca_midi_input_avail(midi) (!(ca_midi_read_stat(midi) & midi->input_avail))
	41	#define ca_midi_output_ready(midi) (!(ca_midi_read_stat(midi) & midi->output_ready))
	42
e4a3d145	43	static void ca_midi_clear_rx(struct snd_ca_midi *midi)
8a5afd29 JCD	44	{
	45	int timeout = 100000;
	46	for (; timeout > 0 && ca_midi_input_avail(midi); timeout--)
	47	ca_midi_read_data(midi);
	48	#ifdef CONFIG_SND_DEBUG
	49	if (timeout <= 0)
e4a3d145 TI	50	snd_printk(KERN_ERR "ca_midi_clear_rx: timeout (status = 0x%x)\n",
e4a3d145 TI	51	ca_midi_read_stat(midi));
8a5afd29 JCD	52	#endif
	53	}
	54
e4a3d145 TI	55	static void ca_midi_interrupt(struct snd_ca_midi *midi, unsigned int status)
e4a3d145 TI	56	{
8a5afd29 JCD	57	unsigned char byte;
	58
	59	if (midi->rmidi == NULL) {
	60	midi->interrupt_disable(midi,midi->tx_enable \| midi->rx_enable);
	61	return;
	62	}
	63
	64	spin_lock(&midi->input_lock);
	65	if ((status & midi->ipr_rx) && ca_midi_input_avail(midi)) {
	66	if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
	67	ca_midi_clear_rx(midi);
	68	} else {
	69	byte = ca_midi_read_data(midi);
	70	if(midi->substream_input)
	71	snd_rawmidi_receive(midi->substream_input, &byte, 1);
	72
	73
	74	}
	75	}
	76	spin_unlock(&midi->input_lock);
	77
	78	spin_lock(&midi->output_lock);
	79	if ((status & midi->ipr_tx) && ca_midi_output_ready(midi)) {
	80	if (midi->substream_output &&
	81	snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
	82	ca_midi_write_data(midi, byte);
	83	} else {
	84	midi->interrupt_disable(midi,midi->tx_enable);
	85	}
	86	}
	87	spin_unlock(&midi->output_lock);
	88
	89	}
	90
e4a3d145	91	static void ca_midi_cmd(struct snd_ca_midi *midi, unsigned char cmd, int ack)
8a5afd29 JCD	92	{
	93	unsigned long flags;
	94	int timeout, ok;
	95
	96	spin_lock_irqsave(&midi->input_lock, flags);
	97	ca_midi_write_data(midi, 0x00);
	98	/* ca_midi_clear_rx(midi); */
	99
	100	ca_midi_write_cmd(midi, cmd);
	101	if (ack) {
	102	ok = 0;
	103	timeout = 10000;
	104	while (!ok && timeout-- > 0) {
	105	if (ca_midi_input_avail(midi)) {
	106	if (ca_midi_read_data(midi) == midi->ack)
	107	ok = 1;
	108	}
	109	}
	110	if (!ok && ca_midi_read_data(midi) == midi->ack)
	111	ok = 1;
	112	} else {
	113	ok = 1;
	114	}
	115	spin_unlock_irqrestore(&midi->input_lock, flags);
	116	if (!ok)
	117	snd_printk(KERN_ERR "ca_midi_cmd: 0x%x failed at 0x%x (status = 0x%x, data = 0x%x)!!!\n",
	118	cmd,
	119	midi->get_dev_id_port(midi->dev_id),
	120	ca_midi_read_stat(midi),
	121	ca_midi_read_data(midi));
	122	}
	123
e4a3d145	124	static int ca_midi_input_open(struct snd_rawmidi_substream *substream)
8a5afd29	125	{
e4a3d145	126	struct snd_ca_midi *midi = substream->rmidi->private_data;
8a5afd29 JCD	127	unsigned long flags;
	128
	129	snd_assert(midi->dev_id, return -ENXIO);
	130	spin_lock_irqsave(&midi->open_lock, flags);
	131	midi->midi_mode \|= CA_MIDI_MODE_INPUT;
	132	midi->substream_input = substream;
	133	if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) {
	134	spin_unlock_irqrestore(&midi->open_lock, flags);
	135	ca_midi_cmd(midi, midi->reset, 1);
	136	ca_midi_cmd(midi, midi->enter_uart, 1);
	137	} else {
	138	spin_unlock_irqrestore(&midi->open_lock, flags);
	139	}
	140	return 0;
	141	}
	142
e4a3d145	143	static int ca_midi_output_open(struct snd_rawmidi_substream *substream)
8a5afd29	144	{
e4a3d145	145	struct snd_ca_midi *midi = substream->rmidi->private_data;
8a5afd29 JCD	146	unsigned long flags;
	147
	148	snd_assert(midi->dev_id, return -ENXIO);
	149	spin_lock_irqsave(&midi->open_lock, flags);
	150	midi->midi_mode \|= CA_MIDI_MODE_OUTPUT;
	151	midi->substream_output = substream;
	152	if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
	153	spin_unlock_irqrestore(&midi->open_lock, flags);
	154	ca_midi_cmd(midi, midi->reset, 1);
	155	ca_midi_cmd(midi, midi->enter_uart, 1);
	156	} else {
	157	spin_unlock_irqrestore(&midi->open_lock, flags);
	158	}
	159	return 0;
	160	}
	161
e4a3d145	162	static int ca_midi_input_close(struct snd_rawmidi_substream *substream)
8a5afd29	163	{
e4a3d145	164	struct snd_ca_midi *midi = substream->rmidi->private_data;
8a5afd29 JCD	165	unsigned long flags;
	166
	167	snd_assert(midi->dev_id, return -ENXIO);
	168	spin_lock_irqsave(&midi->open_lock, flags);
	169	midi->interrupt_disable(midi,midi->rx_enable);
	170	midi->midi_mode &= ~CA_MIDI_MODE_INPUT;
	171	midi->substream_input = NULL;
	172	if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) {
	173	spin_unlock_irqrestore(&midi->open_lock, flags);
	174	ca_midi_cmd(midi, midi->reset, 0);
	175	} else {
	176	spin_unlock_irqrestore(&midi->open_lock, flags);
	177	}
	178	return 0;
	179	}
	180
e4a3d145	181	static int ca_midi_output_close(struct snd_rawmidi_substream *substream)
8a5afd29	182	{
e4a3d145	183	struct snd_ca_midi *midi = substream->rmidi->private_data;
8a5afd29 JCD	184	unsigned long flags;
	185	snd_assert(midi->dev_id, return -ENXIO);
	186
	187	spin_lock_irqsave(&midi->open_lock, flags);
	188
	189	midi->interrupt_disable(midi,midi->tx_enable);
	190	midi->midi_mode &= ~CA_MIDI_MODE_OUTPUT;
	191	midi->substream_output = NULL;
	192
	193	if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
	194	spin_unlock_irqrestore(&midi->open_lock, flags);
	195	ca_midi_cmd(midi, midi->reset, 0);
	196	} else {
	197	spin_unlock_irqrestore(&midi->open_lock, flags);
	198	}
	199	return 0;
	200	}
	201
e4a3d145	202	static void ca_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
8a5afd29	203	{
e4a3d145	204	struct snd_ca_midi *midi = substream->rmidi->private_data;
8a5afd29 JCD	205	snd_assert(midi->dev_id, return);
	206
	207	if (up) {
	208	midi->interrupt_enable(midi,midi->rx_enable);
	209	} else {
	210	midi->interrupt_disable(midi, midi->rx_enable);
	211	}
	212	}
	213
e4a3d145	214	static void ca_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
8a5afd29	215	{
e4a3d145	216	struct snd_ca_midi *midi = substream->rmidi->private_data;
8a5afd29 JCD	217	unsigned long flags;
	218
	219	snd_assert(midi->dev_id, return);
	220
	221	if (up) {
	222	int max = 4;
	223	unsigned char byte;
	224
	225	spin_lock_irqsave(&midi->output_lock, flags);
	226
	227	/* try to send some amount of bytes here before interrupts */
	228	while (max > 0) {
	229	if (ca_midi_output_ready(midi)) {
	230	if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT) \|\|
	231	snd_rawmidi_transmit(substream, &byte, 1) != 1) {
	232	/* no more data */
	233	spin_unlock_irqrestore(&midi->output_lock, flags);
	234	return;
	235	}
	236	ca_midi_write_data(midi, byte);
	237	max--;
	238	} else {
	239	break;
	240	}
	241	}
	242
	243	spin_unlock_irqrestore(&midi->output_lock, flags);
	244	midi->interrupt_enable(midi,midi->tx_enable);
	245
	246	} else {
	247	midi->interrupt_disable(midi,midi->tx_enable);
	248	}
	249	}
	250
e4a3d145	251	static struct snd_rawmidi_ops ca_midi_output =
8a5afd29 JCD	252	{
	253	.open = ca_midi_output_open,
	254	.close = ca_midi_output_close,
	255	.trigger = ca_midi_output_trigger,
	256	};
	257
e4a3d145	258	static struct snd_rawmidi_ops ca_midi_input =
8a5afd29 JCD	259	{
	260	.open = ca_midi_input_open,
	261	.close = ca_midi_input_close,
	262	.trigger = ca_midi_input_trigger,
	263	};
	264
e4a3d145 TI	265	static void ca_midi_free(struct snd_ca_midi *midi)
e4a3d145 TI	266	{
8a5afd29 JCD	267	midi->interrupt = NULL;
	268	midi->interrupt_enable = NULL;
	269	midi->interrupt_disable = NULL;
	270	midi->read = NULL;
	271	midi->write = NULL;
	272	midi->get_dev_id_card = NULL;
	273	midi->get_dev_id_port = NULL;
	274	midi->rmidi = NULL;
	275	}
	276
e4a3d145	277	static void ca_rmidi_free(struct snd_rawmidi *rmidi)
8a5afd29	278	{
e4a3d145	279	ca_midi_free(rmidi->private_data);
8a5afd29 JCD	280	}
8a5afd29 JCD	281
e4a3d145	282	int __devinit ca_midi_init(void dev_id, struct snd_ca_midi midi, int device, char *name)
8a5afd29	283	{
e4a3d145	284	struct snd_rawmidi *rmidi;
8a5afd29 JCD	285	int err;
	286
	287	if ((err = snd_rawmidi_new(midi->get_dev_id_card(midi->dev_id), name, device, 1, 1, &rmidi)) < 0)
	288	return err;
	289
	290	midi->dev_id = dev_id;
	291	midi->interrupt = ca_midi_interrupt;
	292
	293	spin_lock_init(&midi->open_lock);
	294	spin_lock_init(&midi->input_lock);
	295	spin_lock_init(&midi->output_lock);
	296
	297	strcpy(rmidi->name, name);
	298	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &ca_midi_output);
	299	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &ca_midi_input);
	300	rmidi->info_flags \|= SNDRV_RAWMIDI_INFO_OUTPUT \|
	301	SNDRV_RAWMIDI_INFO_INPUT \|
	302	SNDRV_RAWMIDI_INFO_DUPLEX;
	303	rmidi->private_data = midi;
	304	rmidi->private_free = ca_rmidi_free;
	305
	306	midi->rmidi = rmidi;
	307	return 0;
	308	}
	309