[net-next-2.6.git] / sound / pci / emu10k1 / emumpu401.c

/*
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *  Routines for control of EMU10K1 MPU-401 in UART mode
 *
 *
 *   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 <sound/driver.h>
#include <linux/time.h>
#include <linux/init.h>
#include <sound/core.h>
#include <sound/emu10k1.h>

#define EMU10K1_MIDI_MODE_INPUT		(1<<0)
#define EMU10K1_MIDI_MODE_OUTPUT	(1<<1)

static inline unsigned char mpu401_read(struct snd_emu10k1 *emu,
					struct snd_emu10k1_midi *mpu, int idx)
{
	if (emu->audigy)
		return (unsigned char)snd_emu10k1_ptr_read(emu, mpu->port + idx, 0);
	else
		return inb(emu->port + mpu->port + idx);
}

static inline void mpu401_write(struct snd_emu10k1 *emu,
				struct snd_emu10k1_midi *mpu, int data, int idx)
{
	if (emu->audigy)
		snd_emu10k1_ptr_write(emu, mpu->port + idx, 0, data);
	else
		outb(data, emu->port + mpu->port + idx);
}

#define mpu401_write_data(emu, mpu, data)	mpu401_write(emu, mpu, data, 0)
#define mpu401_write_cmd(emu, mpu, data)	mpu401_write(emu, mpu, data, 1)
#define mpu401_read_data(emu, mpu)		mpu401_read(emu, mpu, 0)
#define mpu401_read_stat(emu, mpu)		mpu401_read(emu, mpu, 1)

#define mpu401_input_avail(emu,mpu)	(!(mpu401_read_stat(emu,mpu) & 0x80))
#define mpu401_output_ready(emu,mpu)	(!(mpu401_read_stat(emu,mpu) & 0x40))

#define MPU401_RESET		0xff
#define MPU401_ENTER_UART	0x3f
#define MPU401_ACK		0xfe

static void mpu401_clear_rx(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *mpu)
{
	int timeout = 100000;
	for (; timeout > 0 && mpu401_input_avail(emu, mpu); timeout--)
		mpu401_read_data(emu, mpu);
#ifdef CONFIG_SND_DEBUG
	if (timeout <= 0)
		snd_printk(KERN_ERR "cmd: clear rx timeout (status = 0x%x)\n", mpu401_read_stat(emu, mpu));
#endif
}

/*

 */

static void do_emu10k1_midi_interrupt(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *midi, unsigned int status)
{
	unsigned char byte;

	if (midi->rmidi == NULL) {
		snd_emu10k1_intr_disable(emu, midi->tx_enable | midi->rx_enable);
		return;
	}

	spin_lock(&midi->input_lock);
	if ((status & midi->ipr_rx) && mpu401_input_avail(emu, midi)) {
		if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
			mpu401_clear_rx(emu, midi);
		} else {
			byte = mpu401_read_data(emu, 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) && mpu401_output_ready(emu, midi)) {
		if (midi->substream_output &&
		    snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
			mpu401_write_data(emu, midi, byte);
		} else {
			snd_emu10k1_intr_disable(emu, midi->tx_enable);
		}
	}
	spin_unlock(&midi->output_lock);
}

static void snd_emu10k1_midi_interrupt(struct snd_emu10k1 *emu, unsigned int status)
{
	do_emu10k1_midi_interrupt(emu, &emu->midi, status);
}

static void snd_emu10k1_midi_interrupt2(struct snd_emu10k1 *emu, unsigned int status)
{
	do_emu10k1_midi_interrupt(emu, &emu->midi2, status);
}

static int snd_emu10k1_midi_cmd(struct snd_emu10k1 * emu, struct snd_emu10k1_midi *midi, unsigned char cmd, int ack)
{
	unsigned long flags;
	int timeout, ok;

	spin_lock_irqsave(&midi->input_lock, flags);
	mpu401_write_data(emu, midi, 0x00);
	/* mpu401_clear_rx(emu, midi); */

	mpu401_write_cmd(emu, midi, cmd);
	if (ack) {
		ok = 0;
		timeout = 10000;
		while (!ok && timeout-- > 0) {
			if (mpu401_input_avail(emu, midi)) {
				if (mpu401_read_data(emu, midi) == MPU401_ACK)
					ok = 1;
			}
		}
		if (!ok && mpu401_read_data(emu, midi) == MPU401_ACK)
			ok = 1;
	} else {
		ok = 1;
	}
	spin_unlock_irqrestore(&midi->input_lock, flags);
	if (!ok) {
		snd_printk(KERN_ERR "midi_cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)!!!\n",
			   cmd, emu->port,
			   mpu401_read_stat(emu, midi),
			   mpu401_read_data(emu, midi));
		return 1;
	}
	return 0;
}

static int snd_emu10k1_midi_input_open(struct snd_rawmidi_substream *substream)
{
	struct snd_emu10k1 *emu;
	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
	unsigned long flags;

	emu = midi->emu;
	snd_assert(emu, return -ENXIO);
	spin_lock_irqsave(&midi->open_lock, flags);
	midi->midi_mode |= EMU10K1_MIDI_MODE_INPUT;
	midi->substream_input = substream;
	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
		spin_unlock_irqrestore(&midi->open_lock, flags);
		if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
			goto error_out;
		if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
			goto error_out;
	} else {
		spin_unlock_irqrestore(&midi->open_lock, flags);
	}
	return 0;

error_out:
	return -EIO;
}

static int snd_emu10k1_midi_output_open(struct snd_rawmidi_substream *substream)
{
	struct snd_emu10k1 *emu;
	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
	unsigned long flags;

	emu = midi->emu;
	snd_assert(emu, return -ENXIO);
	spin_lock_irqsave(&midi->open_lock, flags);
	midi->midi_mode |= EMU10K1_MIDI_MODE_OUTPUT;
	midi->substream_output = substream;
	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
		spin_unlock_irqrestore(&midi->open_lock, flags);
		if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
			goto error_out;
		if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
			goto error_out;
	} else {
		spin_unlock_irqrestore(&midi->open_lock, flags);
	}
	return 0;

error_out:
	return -EIO;
}

static int snd_emu10k1_midi_input_close(struct snd_rawmidi_substream *substream)
{
	struct snd_emu10k1 *emu;
	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
	unsigned long flags;
	int err = 0;

	emu = midi->emu;
	snd_assert(emu, return -ENXIO);
	spin_lock_irqsave(&midi->open_lock, flags);
	snd_emu10k1_intr_disable(emu, midi->rx_enable);
	midi->midi_mode &= ~EMU10K1_MIDI_MODE_INPUT;
	midi->substream_input = NULL;
	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
		spin_unlock_irqrestore(&midi->open_lock, flags);
		err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
	} else {
		spin_unlock_irqrestore(&midi->open_lock, flags);
	}
	return err;
}

static int snd_emu10k1_midi_output_close(struct snd_rawmidi_substream *substream)
{
	struct snd_emu10k1 *emu;
	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
	unsigned long flags;
	int err = 0;

	emu = midi->emu;
	snd_assert(emu, return -ENXIO);
	spin_lock_irqsave(&midi->open_lock, flags);
	snd_emu10k1_intr_disable(emu, midi->tx_enable);
	midi->midi_mode &= ~EMU10K1_MIDI_MODE_OUTPUT;
	midi->substream_output = NULL;
	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
		spin_unlock_irqrestore(&midi->open_lock, flags);
		err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
	} else {
		spin_unlock_irqrestore(&midi->open_lock, flags);
	}
	return err;
}

static void snd_emu10k1_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
{
	struct snd_emu10k1 *emu;
	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
	emu = midi->emu;
	snd_assert(emu, return);

	if (up)
		snd_emu10k1_intr_enable(emu, midi->rx_enable);
	else
		snd_emu10k1_intr_disable(emu, midi->rx_enable);
}

static void snd_emu10k1_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
{
	struct snd_emu10k1 *emu;
	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
	unsigned long flags;

	emu = midi->emu;
	snd_assert(emu, return);

	if (up) {
		int max = 4;
		unsigned char byte;
	
		/* try to send some amount of bytes here before interrupts */
		spin_lock_irqsave(&midi->output_lock, flags);
		while (max > 0) {
			if (mpu401_output_ready(emu, midi)) {
				if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT) ||
				    snd_rawmidi_transmit(substream, &byte, 1) != 1) {
					/* no more data */
					spin_unlock_irqrestore(&midi->output_lock, flags);
					return;
				}
				mpu401_write_data(emu, midi, byte);
				max--;
			} else {
				break;
			}
		}
		spin_unlock_irqrestore(&midi->output_lock, flags);
		snd_emu10k1_intr_enable(emu, midi->tx_enable);
	} else {
		snd_emu10k1_intr_disable(emu, midi->tx_enable);
	}
}

/*

 */

static struct snd_rawmidi_ops snd_emu10k1_midi_output =
{
	.open =		snd_emu10k1_midi_output_open,
	.close =	snd_emu10k1_midi_output_close,
	.trigger =	snd_emu10k1_midi_output_trigger,
};

static struct snd_rawmidi_ops snd_emu10k1_midi_input =
{
	.open =		snd_emu10k1_midi_input_open,
	.close =	snd_emu10k1_midi_input_close,
	.trigger =	snd_emu10k1_midi_input_trigger,
};

static void snd_emu10k1_midi_free(struct snd_rawmidi *rmidi)
{
	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)rmidi->private_data;
	midi->interrupt = NULL;
	midi->rmidi = NULL;
}

static int __devinit emu10k1_midi_init(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *midi, int device, char *name)
{
	struct snd_rawmidi *rmidi;
	int err;

	if ((err = snd_rawmidi_new(emu->card, name, device, 1, 1, &rmidi)) < 0)
		return err;
	midi->emu = emu;
	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, &snd_emu10k1_midi_output);
	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_emu10k1_midi_input);
	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT |
	                     SNDRV_RAWMIDI_INFO_INPUT |
	                     SNDRV_RAWMIDI_INFO_DUPLEX;
	rmidi->private_data = midi;
	rmidi->private_free = snd_emu10k1_midi_free;
	midi->rmidi = rmidi;
	return 0;
}

int __devinit snd_emu10k1_midi(struct snd_emu10k1 *emu)
{
	struct snd_emu10k1_midi *midi = &emu->midi;
	int err;

	if ((err = emu10k1_midi_init(emu, midi, 0, "EMU10K1 MPU-401 (UART)")) < 0)
		return err;

	midi->tx_enable = INTE_MIDITXENABLE;
	midi->rx_enable = INTE_MIDIRXENABLE;
	midi->port = MUDATA;
	midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
	midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
	midi->interrupt = snd_emu10k1_midi_interrupt;
	return 0;
}

int __devinit snd_emu10k1_audigy_midi(struct snd_emu10k1 *emu)
{
	struct snd_emu10k1_midi *midi;
	int err;

	midi = &emu->midi;
	if ((err = emu10k1_midi_init(emu, midi, 0, "Audigy MPU-401 (UART)")) < 0)
		return err;

	midi->tx_enable = INTE_MIDITXENABLE;
	midi->rx_enable = INTE_MIDIRXENABLE;
	midi->port = A_MUDATA1;
	midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
	midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
	midi->interrupt = snd_emu10k1_midi_interrupt;

	midi = &emu->midi2;
	if ((err = emu10k1_midi_init(emu, midi, 1, "Audigy MPU-401 #2")) < 0)
		return err;

	midi->tx_enable = INTE_A_MIDITXENABLE2;
	midi->rx_enable = INTE_A_MIDIRXENABLE2;
	midi->port = A_MUDATA2;
	midi->ipr_tx = IPR_A_MIDITRANSBUFEMPTY2;
	midi->ipr_rx = IPR_A_MIDIRECVBUFEMPTY2;
	midi->interrupt = snd_emu10k1_midi_interrupt2;
	return 0;
}
Commit	Line	Data
1da177e4	1	/*
c1017a4c	2	* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4 LT	3	* Routines for control of EMU10K1 MPU-401 in UART mode
	4	*
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	*/
	21
	22	#include <sound/driver.h>
	23	#include <linux/time.h>
	24	#include <linux/init.h>
	25	#include <sound/core.h>
	26	#include <sound/emu10k1.h>
	27
	28	#define EMU10K1_MIDI_MODE_INPUT (1<<0)
	29	#define EMU10K1_MIDI_MODE_OUTPUT (1<<1)
	30
eb4698f3 TI	31	static inline unsigned char mpu401_read(struct snd_emu10k1 *emu,
eb4698f3 TI	32	struct snd_emu10k1_midi *mpu, int idx)
1da177e4 LT	33	{
	34	if (emu->audigy)
	35	return (unsigned char)snd_emu10k1_ptr_read(emu, mpu->port + idx, 0);
	36	else
	37	return inb(emu->port + mpu->port + idx);
	38	}
	39
eb4698f3 TI	40	static inline void mpu401_write(struct snd_emu10k1 *emu,
eb4698f3 TI	41	struct snd_emu10k1_midi *mpu, int data, int idx)
1da177e4 LT	42	{
	43	if (emu->audigy)
	44	snd_emu10k1_ptr_write(emu, mpu->port + idx, 0, data);
	45	else
	46	outb(data, emu->port + mpu->port + idx);
	47	}
	48
	49	#define mpu401_write_data(emu, mpu, data) mpu401_write(emu, mpu, data, 0)
	50	#define mpu401_write_cmd(emu, mpu, data) mpu401_write(emu, mpu, data, 1)
	51	#define mpu401_read_data(emu, mpu) mpu401_read(emu, mpu, 0)
	52	#define mpu401_read_stat(emu, mpu) mpu401_read(emu, mpu, 1)
	53
	54	#define mpu401_input_avail(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x80))
	55	#define mpu401_output_ready(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x40))
	56
	57	#define MPU401_RESET 0xff
	58	#define MPU401_ENTER_UART 0x3f
	59	#define MPU401_ACK 0xfe
	60
eb4698f3	61	static void mpu401_clear_rx(struct snd_emu10k1 emu, struct snd_emu10k1_midi mpu)
1da177e4 LT	62	{
	63	int timeout = 100000;
	64	for (; timeout > 0 && mpu401_input_avail(emu, mpu); timeout--)
	65	mpu401_read_data(emu, mpu);
	66	#ifdef CONFIG_SND_DEBUG
	67	if (timeout <= 0)
	68	snd_printk(KERN_ERR "cmd: clear rx timeout (status = 0x%x)\n", mpu401_read_stat(emu, mpu));
	69	#endif
	70	}
	71
	72	/*
	73
	74	*/
	75
eb4698f3	76	static void do_emu10k1_midi_interrupt(struct snd_emu10k1 emu, struct snd_emu10k1_midi midi, unsigned int status)
1da177e4 LT	77	{
	78	unsigned char byte;
	79
	80	if (midi->rmidi == NULL) {
	81	snd_emu10k1_intr_disable(emu, midi->tx_enable \| midi->rx_enable);
	82	return;
	83	}
	84
	85	spin_lock(&midi->input_lock);
	86	if ((status & midi->ipr_rx) && mpu401_input_avail(emu, midi)) {
	87	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
	88	mpu401_clear_rx(emu, midi);
	89	} else {
	90	byte = mpu401_read_data(emu, midi);
	91	if (midi->substream_input)
	92	snd_rawmidi_receive(midi->substream_input, &byte, 1);
	93	}
	94	}
	95	spin_unlock(&midi->input_lock);
	96
	97	spin_lock(&midi->output_lock);
	98	if ((status & midi->ipr_tx) && mpu401_output_ready(emu, midi)) {
	99	if (midi->substream_output &&
	100	snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
	101	mpu401_write_data(emu, midi, byte);
	102	} else {
	103	snd_emu10k1_intr_disable(emu, midi->tx_enable);
	104	}
	105	}
	106	spin_unlock(&midi->output_lock);
	107	}
	108
eb4698f3	109	static void snd_emu10k1_midi_interrupt(struct snd_emu10k1 *emu, unsigned int status)
1da177e4 LT	110	{
	111	do_emu10k1_midi_interrupt(emu, &emu->midi, status);
	112	}
	113
eb4698f3	114	static void snd_emu10k1_midi_interrupt2(struct snd_emu10k1 *emu, unsigned int status)
1da177e4 LT	115	{
	116	do_emu10k1_midi_interrupt(emu, &emu->midi2, status);
	117	}
	118
b130807d	119	static int snd_emu10k1_midi_cmd(struct snd_emu10k1 * emu, struct snd_emu10k1_midi *midi, unsigned char cmd, int ack)
1da177e4 LT	120	{
	121	unsigned long flags;
	122	int timeout, ok;
	123
	124	spin_lock_irqsave(&midi->input_lock, flags);
	125	mpu401_write_data(emu, midi, 0x00);
	126	/* mpu401_clear_rx(emu, midi); */
	127
	128	mpu401_write_cmd(emu, midi, cmd);
	129	if (ack) {
	130	ok = 0;
	131	timeout = 10000;
	132	while (!ok && timeout-- > 0) {
	133	if (mpu401_input_avail(emu, midi)) {
	134	if (mpu401_read_data(emu, midi) == MPU401_ACK)
	135	ok = 1;
	136	}
	137	}
	138	if (!ok && mpu401_read_data(emu, midi) == MPU401_ACK)
	139	ok = 1;
	140	} else {
	141	ok = 1;
	142	}
	143	spin_unlock_irqrestore(&midi->input_lock, flags);
b130807d	144	if (!ok) {
1da177e4 LT	145	snd_printk(KERN_ERR "midi_cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)!!!\n",
	146	cmd, emu->port,
	147	mpu401_read_stat(emu, midi),
	148	mpu401_read_data(emu, midi));
b130807d RD	149	return 1;
	150	}
	151	return 0;
1da177e4 LT	152	}
1da177e4 LT	153
eb4698f3	154	static int snd_emu10k1_midi_input_open(struct snd_rawmidi_substream *substream)
1da177e4	155	{
eb4698f3 TI	156	struct snd_emu10k1 *emu;
eb4698f3 TI	157	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4 LT	158	unsigned long flags;
	159
	160	emu = midi->emu;
	161	snd_assert(emu, return -ENXIO);
	162	spin_lock_irqsave(&midi->open_lock, flags);
	163	midi->midi_mode \|= EMU10K1_MIDI_MODE_INPUT;
	164	midi->substream_input = substream;
	165	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
	166	spin_unlock_irqrestore(&midi->open_lock, flags);
b130807d RD	167	if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
	168	goto error_out;
	169	if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
	170	goto error_out;
1da177e4 LT	171	} else {
	172	spin_unlock_irqrestore(&midi->open_lock, flags);
	173	}
	174	return 0;
b130807d RD	175
	176	error_out:
	177	return -EIO;
1da177e4 LT	178	}
1da177e4 LT	179
eb4698f3	180	static int snd_emu10k1_midi_output_open(struct snd_rawmidi_substream *substream)
1da177e4	181	{
eb4698f3 TI	182	struct snd_emu10k1 *emu;
eb4698f3 TI	183	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4 LT	184	unsigned long flags;
	185
	186	emu = midi->emu;
	187	snd_assert(emu, return -ENXIO);
	188	spin_lock_irqsave(&midi->open_lock, flags);
	189	midi->midi_mode \|= EMU10K1_MIDI_MODE_OUTPUT;
	190	midi->substream_output = substream;
	191	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
	192	spin_unlock_irqrestore(&midi->open_lock, flags);
b130807d RD	193	if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
	194	goto error_out;
	195	if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
	196	goto error_out;
1da177e4 LT	197	} else {
	198	spin_unlock_irqrestore(&midi->open_lock, flags);
	199	}
	200	return 0;
b130807d RD	201
	202	error_out:
	203	return -EIO;
1da177e4 LT	204	}
1da177e4 LT	205
eb4698f3	206	static int snd_emu10k1_midi_input_close(struct snd_rawmidi_substream *substream)
1da177e4	207	{
eb4698f3 TI	208	struct snd_emu10k1 *emu;
eb4698f3 TI	209	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4	210	unsigned long flags;
b130807d	211	int err = 0;
1da177e4 LT	212
	213	emu = midi->emu;
	214	snd_assert(emu, return -ENXIO);
	215	spin_lock_irqsave(&midi->open_lock, flags);
	216	snd_emu10k1_intr_disable(emu, midi->rx_enable);
	217	midi->midi_mode &= ~EMU10K1_MIDI_MODE_INPUT;
	218	midi->substream_input = NULL;
	219	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
	220	spin_unlock_irqrestore(&midi->open_lock, flags);
b130807d	221	err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
1da177e4 LT	222	} else {
	223	spin_unlock_irqrestore(&midi->open_lock, flags);
	224	}
b130807d	225	return err;
1da177e4 LT	226	}
1da177e4 LT	227
eb4698f3	228	static int snd_emu10k1_midi_output_close(struct snd_rawmidi_substream *substream)
1da177e4	229	{
eb4698f3 TI	230	struct snd_emu10k1 *emu;
eb4698f3 TI	231	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4	232	unsigned long flags;
b130807d	233	int err = 0;
1da177e4 LT	234
	235	emu = midi->emu;
	236	snd_assert(emu, return -ENXIO);
	237	spin_lock_irqsave(&midi->open_lock, flags);
	238	snd_emu10k1_intr_disable(emu, midi->tx_enable);
	239	midi->midi_mode &= ~EMU10K1_MIDI_MODE_OUTPUT;
	240	midi->substream_output = NULL;
	241	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
	242	spin_unlock_irqrestore(&midi->open_lock, flags);
b130807d	243	err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
1da177e4 LT	244	} else {
	245	spin_unlock_irqrestore(&midi->open_lock, flags);
	246	}
b130807d	247	return err;
1da177e4 LT	248	}
1da177e4 LT	249
eb4698f3	250	static void snd_emu10k1_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
1da177e4	251	{
eb4698f3 TI	252	struct snd_emu10k1 *emu;
eb4698f3 TI	253	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4 LT	254	emu = midi->emu;
	255	snd_assert(emu, return);
	256
	257	if (up)
	258	snd_emu10k1_intr_enable(emu, midi->rx_enable);
	259	else
	260	snd_emu10k1_intr_disable(emu, midi->rx_enable);
	261	}
	262
eb4698f3	263	static void snd_emu10k1_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
1da177e4	264	{
eb4698f3 TI	265	struct snd_emu10k1 *emu;
eb4698f3 TI	266	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4 LT	267	unsigned long flags;
	268
	269	emu = midi->emu;
	270	snd_assert(emu, return);
	271
	272	if (up) {
	273	int max = 4;
	274	unsigned char byte;
	275
	276	/* try to send some amount of bytes here before interrupts */
	277	spin_lock_irqsave(&midi->output_lock, flags);
	278	while (max > 0) {
	279	if (mpu401_output_ready(emu, midi)) {
	280	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT) \|\|
	281	snd_rawmidi_transmit(substream, &byte, 1) != 1) {
	282	/* no more data */
	283	spin_unlock_irqrestore(&midi->output_lock, flags);
	284	return;
	285	}
	286	mpu401_write_data(emu, midi, byte);
	287	max--;
	288	} else {
	289	break;
	290	}
	291	}
	292	spin_unlock_irqrestore(&midi->output_lock, flags);
	293	snd_emu10k1_intr_enable(emu, midi->tx_enable);
	294	} else {
	295	snd_emu10k1_intr_disable(emu, midi->tx_enable);
	296	}
	297	}
	298
	299	/*
	300
	301	*/
	302
eb4698f3	303	static struct snd_rawmidi_ops snd_emu10k1_midi_output =
1da177e4 LT	304	{
	305	.open = snd_emu10k1_midi_output_open,
	306	.close = snd_emu10k1_midi_output_close,
	307	.trigger = snd_emu10k1_midi_output_trigger,
	308	};
	309
eb4698f3	310	static struct snd_rawmidi_ops snd_emu10k1_midi_input =
1da177e4 LT	311	{
	312	.open = snd_emu10k1_midi_input_open,
	313	.close = snd_emu10k1_midi_input_close,
	314	.trigger = snd_emu10k1_midi_input_trigger,
	315	};
	316
eb4698f3	317	static void snd_emu10k1_midi_free(struct snd_rawmidi *rmidi)
1da177e4	318	{
eb4698f3	319	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )rmidi->private_data;
1da177e4 LT	320	midi->interrupt = NULL;
	321	midi->rmidi = NULL;
	322	}
	323
eb4698f3	324	static int __devinit emu10k1_midi_init(struct snd_emu10k1 emu, struct snd_emu10k1_midi midi, int device, char *name)
1da177e4	325	{
eb4698f3	326	struct snd_rawmidi *rmidi;
1da177e4 LT	327	int err;
	328
	329	if ((err = snd_rawmidi_new(emu->card, name, device, 1, 1, &rmidi)) < 0)
	330	return err;
	331	midi->emu = emu;
	332	spin_lock_init(&midi->open_lock);
	333	spin_lock_init(&midi->input_lock);
	334	spin_lock_init(&midi->output_lock);
	335	strcpy(rmidi->name, name);
	336	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_emu10k1_midi_output);
	337	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_emu10k1_midi_input);
	338	rmidi->info_flags \|= SNDRV_RAWMIDI_INFO_OUTPUT \|
	339	SNDRV_RAWMIDI_INFO_INPUT \|
	340	SNDRV_RAWMIDI_INFO_DUPLEX;
	341	rmidi->private_data = midi;
	342	rmidi->private_free = snd_emu10k1_midi_free;
	343	midi->rmidi = rmidi;
	344	return 0;
	345	}
	346
eb4698f3	347	int __devinit snd_emu10k1_midi(struct snd_emu10k1 *emu)
1da177e4	348	{
eb4698f3	349	struct snd_emu10k1_midi *midi = &emu->midi;
1da177e4 LT	350	int err;
	351
	352	if ((err = emu10k1_midi_init(emu, midi, 0, "EMU10K1 MPU-401 (UART)")) < 0)
	353	return err;
	354
	355	midi->tx_enable = INTE_MIDITXENABLE;
	356	midi->rx_enable = INTE_MIDIRXENABLE;
	357	midi->port = MUDATA;
	358	midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
	359	midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
	360	midi->interrupt = snd_emu10k1_midi_interrupt;
	361	return 0;
	362	}
	363
eb4698f3	364	int __devinit snd_emu10k1_audigy_midi(struct snd_emu10k1 *emu)
1da177e4	365	{
eb4698f3	366	struct snd_emu10k1_midi *midi;
1da177e4 LT	367	int err;
	368
	369	midi = &emu->midi;
	370	if ((err = emu10k1_midi_init(emu, midi, 0, "Audigy MPU-401 (UART)")) < 0)
	371	return err;
	372
	373	midi->tx_enable = INTE_MIDITXENABLE;
	374	midi->rx_enable = INTE_MIDIRXENABLE;
	375	midi->port = A_MUDATA1;
	376	midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
	377	midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
	378	midi->interrupt = snd_emu10k1_midi_interrupt;
	379
	380	midi = &emu->midi2;
	381	if ((err = emu10k1_midi_init(emu, midi, 1, "Audigy MPU-401 #2")) < 0)
	382	return err;
	383
	384	midi->tx_enable = INTE_A_MIDITXENABLE2;
	385	midi->rx_enable = INTE_A_MIDIRXENABLE2;
	386	midi->port = A_MUDATA2;
	387	midi->ipr_tx = IPR_A_MIDITRANSBUFEMPTY2;
	388	midi->ipr_rx = IPR_A_MIDIRECVBUFEMPTY2;
	389	midi->interrupt = snd_emu10k1_midi_interrupt2;
	390	return 0;
	391	}