[deliverable/linux.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 <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;
	if (snd_BUG_ON(!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;
	if (snd_BUG_ON(!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;
	if (snd_BUG_ON(!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;
	if (snd_BUG_ON(!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;
	if (snd_BUG_ON(!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;
	if (snd_BUG_ON(!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
1da177e4 LT	22	#include <linux/time.h>
	23	#include <linux/init.h>
	24	#include <sound/core.h>
	25	#include <sound/emu10k1.h>
	26
	27	#define EMU10K1_MIDI_MODE_INPUT (1<<0)
	28	#define EMU10K1_MIDI_MODE_OUTPUT (1<<1)
	29
eb4698f3 TI	30	static inline unsigned char mpu401_read(struct snd_emu10k1 *emu,
eb4698f3 TI	31	struct snd_emu10k1_midi *mpu, int idx)
1da177e4 LT	32	{
	33	if (emu->audigy)
	34	return (unsigned char)snd_emu10k1_ptr_read(emu, mpu->port + idx, 0);
	35	else
	36	return inb(emu->port + mpu->port + idx);
	37	}
	38
eb4698f3 TI	39	static inline void mpu401_write(struct snd_emu10k1 *emu,
eb4698f3 TI	40	struct snd_emu10k1_midi *mpu, int data, int idx)
1da177e4 LT	41	{
	42	if (emu->audigy)
	43	snd_emu10k1_ptr_write(emu, mpu->port + idx, 0, data);
	44	else
	45	outb(data, emu->port + mpu->port + idx);
	46	}
	47
	48	#define mpu401_write_data(emu, mpu, data) mpu401_write(emu, mpu, data, 0)
	49	#define mpu401_write_cmd(emu, mpu, data) mpu401_write(emu, mpu, data, 1)
	50	#define mpu401_read_data(emu, mpu) mpu401_read(emu, mpu, 0)
	51	#define mpu401_read_stat(emu, mpu) mpu401_read(emu, mpu, 1)
	52
	53	#define mpu401_input_avail(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x80))
	54	#define mpu401_output_ready(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x40))
	55
	56	#define MPU401_RESET 0xff
	57	#define MPU401_ENTER_UART 0x3f
	58	#define MPU401_ACK 0xfe
	59
eb4698f3	60	static void mpu401_clear_rx(struct snd_emu10k1 emu, struct snd_emu10k1_midi mpu)
1da177e4 LT	61	{
	62	int timeout = 100000;
	63	for (; timeout > 0 && mpu401_input_avail(emu, mpu); timeout--)
	64	mpu401_read_data(emu, mpu);
	65	#ifdef CONFIG_SND_DEBUG
	66	if (timeout <= 0)
	67	snd_printk(KERN_ERR "cmd: clear rx timeout (status = 0x%x)\n", mpu401_read_stat(emu, mpu));
	68	#endif
	69	}
	70
	71	/*
	72
	73	*/
	74
eb4698f3	75	static void do_emu10k1_midi_interrupt(struct snd_emu10k1 emu, struct snd_emu10k1_midi midi, unsigned int status)
1da177e4 LT	76	{
	77	unsigned char byte;
	78
	79	if (midi->rmidi == NULL) {
	80	snd_emu10k1_intr_disable(emu, midi->tx_enable \| midi->rx_enable);
	81	return;
	82	}
	83
	84	spin_lock(&midi->input_lock);
	85	if ((status & midi->ipr_rx) && mpu401_input_avail(emu, midi)) {
	86	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
	87	mpu401_clear_rx(emu, midi);
	88	} else {
	89	byte = mpu401_read_data(emu, midi);
	90	if (midi->substream_input)
	91	snd_rawmidi_receive(midi->substream_input, &byte, 1);
	92	}
	93	}
	94	spin_unlock(&midi->input_lock);
	95
	96	spin_lock(&midi->output_lock);
	97	if ((status & midi->ipr_tx) && mpu401_output_ready(emu, midi)) {
	98	if (midi->substream_output &&
	99	snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
	100	mpu401_write_data(emu, midi, byte);
	101	} else {
	102	snd_emu10k1_intr_disable(emu, midi->tx_enable);
	103	}
	104	}
	105	spin_unlock(&midi->output_lock);
	106	}
	107
eb4698f3	108	static void snd_emu10k1_midi_interrupt(struct snd_emu10k1 *emu, unsigned int status)
1da177e4 LT	109	{
	110	do_emu10k1_midi_interrupt(emu, &emu->midi, status);
	111	}
	112
eb4698f3	113	static void snd_emu10k1_midi_interrupt2(struct snd_emu10k1 *emu, unsigned int status)
1da177e4 LT	114	{
	115	do_emu10k1_midi_interrupt(emu, &emu->midi2, status);
	116	}
	117
b130807d	118	static int snd_emu10k1_midi_cmd(struct snd_emu10k1 * emu, struct snd_emu10k1_midi *midi, unsigned char cmd, int ack)
1da177e4 LT	119	{
	120	unsigned long flags;
	121	int timeout, ok;
	122
	123	spin_lock_irqsave(&midi->input_lock, flags);
	124	mpu401_write_data(emu, midi, 0x00);
	125	/* mpu401_clear_rx(emu, midi); */
	126
	127	mpu401_write_cmd(emu, midi, cmd);
	128	if (ack) {
	129	ok = 0;
	130	timeout = 10000;
	131	while (!ok && timeout-- > 0) {
	132	if (mpu401_input_avail(emu, midi)) {
	133	if (mpu401_read_data(emu, midi) == MPU401_ACK)
	134	ok = 1;
	135	}
	136	}
	137	if (!ok && mpu401_read_data(emu, midi) == MPU401_ACK)
	138	ok = 1;
	139	} else {
	140	ok = 1;
	141	}
	142	spin_unlock_irqrestore(&midi->input_lock, flags);
b130807d	143	if (!ok) {
1da177e4 LT	144	snd_printk(KERN_ERR "midi_cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)!!!\n",
	145	cmd, emu->port,
	146	mpu401_read_stat(emu, midi),
	147	mpu401_read_data(emu, midi));
b130807d RD	148	return 1;
	149	}
	150	return 0;
1da177e4 LT	151	}
1da177e4 LT	152
eb4698f3	153	static int snd_emu10k1_midi_input_open(struct snd_rawmidi_substream *substream)
1da177e4	154	{
eb4698f3 TI	155	struct snd_emu10k1 *emu;
eb4698f3 TI	156	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4 LT	157	unsigned long flags;
	158
	159	emu = midi->emu;
da3cec35 TI	160	if (snd_BUG_ON(!emu))
da3cec35 TI	161	return -ENXIO;
1da177e4 LT	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;
da3cec35 TI	187	if (snd_BUG_ON(!emu))
da3cec35 TI	188	return -ENXIO;
1da177e4 LT	189	spin_lock_irqsave(&midi->open_lock, flags);
	190	midi->midi_mode \|= EMU10K1_MIDI_MODE_OUTPUT;
	191	midi->substream_output = substream;
	192	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
	193	spin_unlock_irqrestore(&midi->open_lock, flags);
b130807d RD	194	if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
	195	goto error_out;
	196	if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
	197	goto error_out;
1da177e4 LT	198	} else {
	199	spin_unlock_irqrestore(&midi->open_lock, flags);
	200	}
	201	return 0;
b130807d RD	202
	203	error_out:
	204	return -EIO;
1da177e4 LT	205	}
1da177e4 LT	206
eb4698f3	207	static int snd_emu10k1_midi_input_close(struct snd_rawmidi_substream *substream)
1da177e4	208	{
eb4698f3 TI	209	struct snd_emu10k1 *emu;
eb4698f3 TI	210	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4	211	unsigned long flags;
b130807d	212	int err = 0;
1da177e4 LT	213
1da177e4 LT	214	emu = midi->emu;
da3cec35 TI	215	if (snd_BUG_ON(!emu))
da3cec35 TI	216	return -ENXIO;
1da177e4 LT	217	spin_lock_irqsave(&midi->open_lock, flags);
	218	snd_emu10k1_intr_disable(emu, midi->rx_enable);
	219	midi->midi_mode &= ~EMU10K1_MIDI_MODE_INPUT;
	220	midi->substream_input = NULL;
	221	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
	222	spin_unlock_irqrestore(&midi->open_lock, flags);
b130807d	223	err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
1da177e4 LT	224	} else {
	225	spin_unlock_irqrestore(&midi->open_lock, flags);
	226	}
b130807d	227	return err;
1da177e4 LT	228	}
1da177e4 LT	229
eb4698f3	230	static int snd_emu10k1_midi_output_close(struct snd_rawmidi_substream *substream)
1da177e4	231	{
eb4698f3 TI	232	struct snd_emu10k1 *emu;
eb4698f3 TI	233	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4	234	unsigned long flags;
b130807d	235	int err = 0;
1da177e4 LT	236
1da177e4 LT	237	emu = midi->emu;
da3cec35 TI	238	if (snd_BUG_ON(!emu))
da3cec35 TI	239	return -ENXIO;
1da177e4 LT	240	spin_lock_irqsave(&midi->open_lock, flags);
	241	snd_emu10k1_intr_disable(emu, midi->tx_enable);
	242	midi->midi_mode &= ~EMU10K1_MIDI_MODE_OUTPUT;
	243	midi->substream_output = NULL;
	244	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
	245	spin_unlock_irqrestore(&midi->open_lock, flags);
b130807d	246	err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
1da177e4 LT	247	} else {
	248	spin_unlock_irqrestore(&midi->open_lock, flags);
	249	}
b130807d	250	return err;
1da177e4 LT	251	}
1da177e4 LT	252
eb4698f3	253	static void snd_emu10k1_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
1da177e4	254	{
eb4698f3 TI	255	struct snd_emu10k1 *emu;
eb4698f3 TI	256	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4	257	emu = midi->emu;
da3cec35 TI	258	if (snd_BUG_ON(!emu))
da3cec35 TI	259	return;
1da177e4 LT	260
	261	if (up)
	262	snd_emu10k1_intr_enable(emu, midi->rx_enable);
	263	else
	264	snd_emu10k1_intr_disable(emu, midi->rx_enable);
	265	}
	266
eb4698f3	267	static void snd_emu10k1_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
1da177e4	268	{
eb4698f3 TI	269	struct snd_emu10k1 *emu;
eb4698f3 TI	270	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4 LT	271	unsigned long flags;
	272
	273	emu = midi->emu;
da3cec35 TI	274	if (snd_BUG_ON(!emu))
da3cec35 TI	275	return;
1da177e4 LT	276
	277	if (up) {
	278	int max = 4;
	279	unsigned char byte;
	280
	281	/* try to send some amount of bytes here before interrupts */
	282	spin_lock_irqsave(&midi->output_lock, flags);
	283	while (max > 0) {
	284	if (mpu401_output_ready(emu, midi)) {
	285	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT) \|\|
	286	snd_rawmidi_transmit(substream, &byte, 1) != 1) {
	287	/* no more data */
	288	spin_unlock_irqrestore(&midi->output_lock, flags);
	289	return;
	290	}
	291	mpu401_write_data(emu, midi, byte);
	292	max--;
	293	} else {
	294	break;
	295	}
	296	}
	297	spin_unlock_irqrestore(&midi->output_lock, flags);
	298	snd_emu10k1_intr_enable(emu, midi->tx_enable);
	299	} else {
	300	snd_emu10k1_intr_disable(emu, midi->tx_enable);
	301	}
	302	}
	303
	304	/*
	305
	306	*/
	307
eb4698f3	308	static struct snd_rawmidi_ops snd_emu10k1_midi_output =
1da177e4 LT	309	{
	310	.open = snd_emu10k1_midi_output_open,
	311	.close = snd_emu10k1_midi_output_close,
	312	.trigger = snd_emu10k1_midi_output_trigger,
	313	};
	314
eb4698f3	315	static struct snd_rawmidi_ops snd_emu10k1_midi_input =
1da177e4 LT	316	{
	317	.open = snd_emu10k1_midi_input_open,
	318	.close = snd_emu10k1_midi_input_close,
	319	.trigger = snd_emu10k1_midi_input_trigger,
	320	};
	321
eb4698f3	322	static void snd_emu10k1_midi_free(struct snd_rawmidi *rmidi)
1da177e4	323	{
eb4698f3	324	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )rmidi->private_data;
1da177e4 LT	325	midi->interrupt = NULL;
	326	midi->rmidi = NULL;
	327	}
	328
eb4698f3	329	static int __devinit emu10k1_midi_init(struct snd_emu10k1 emu, struct snd_emu10k1_midi midi, int device, char *name)
1da177e4	330	{
eb4698f3	331	struct snd_rawmidi *rmidi;
1da177e4 LT	332	int err;
	333
	334	if ((err = snd_rawmidi_new(emu->card, name, device, 1, 1, &rmidi)) < 0)
	335	return err;
	336	midi->emu = emu;
	337	spin_lock_init(&midi->open_lock);
	338	spin_lock_init(&midi->input_lock);
	339	spin_lock_init(&midi->output_lock);
	340	strcpy(rmidi->name, name);
	341	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_emu10k1_midi_output);
	342	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_emu10k1_midi_input);
	343	rmidi->info_flags \|= SNDRV_RAWMIDI_INFO_OUTPUT \|
	344	SNDRV_RAWMIDI_INFO_INPUT \|
	345	SNDRV_RAWMIDI_INFO_DUPLEX;
	346	rmidi->private_data = midi;
	347	rmidi->private_free = snd_emu10k1_midi_free;
	348	midi->rmidi = rmidi;
	349	return 0;
	350	}
	351
eb4698f3	352	int __devinit snd_emu10k1_midi(struct snd_emu10k1 *emu)
1da177e4	353	{
eb4698f3	354	struct snd_emu10k1_midi *midi = &emu->midi;
1da177e4 LT	355	int err;
	356
	357	if ((err = emu10k1_midi_init(emu, midi, 0, "EMU10K1 MPU-401 (UART)")) < 0)
	358	return err;
	359
	360	midi->tx_enable = INTE_MIDITXENABLE;
	361	midi->rx_enable = INTE_MIDIRXENABLE;
	362	midi->port = MUDATA;
	363	midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
	364	midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
	365	midi->interrupt = snd_emu10k1_midi_interrupt;
	366	return 0;
	367	}
	368
eb4698f3	369	int __devinit snd_emu10k1_audigy_midi(struct snd_emu10k1 *emu)
1da177e4	370	{
eb4698f3	371	struct snd_emu10k1_midi *midi;
1da177e4 LT	372	int err;
	373
	374	midi = &emu->midi;
	375	if ((err = emu10k1_midi_init(emu, midi, 0, "Audigy MPU-401 (UART)")) < 0)
	376	return err;
	377
	378	midi->tx_enable = INTE_MIDITXENABLE;
	379	midi->rx_enable = INTE_MIDIRXENABLE;
	380	midi->port = A_MUDATA1;
	381	midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
	382	midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
	383	midi->interrupt = snd_emu10k1_midi_interrupt;
	384
	385	midi = &emu->midi2;
	386	if ((err = emu10k1_midi_init(emu, midi, 1, "Audigy MPU-401 #2")) < 0)
	387	return err;
	388
	389	midi->tx_enable = INTE_A_MIDITXENABLE2;
	390	midi->rx_enable = INTE_A_MIDIRXENABLE2;
	391	midi->port = A_MUDATA2;
	392	midi->ipr_tx = IPR_A_MIDITRANSBUFEMPTY2;
	393	midi->ipr_rx = IPR_A_MIDIRECVBUFEMPTY2;
	394	midi->interrupt = snd_emu10k1_midi_interrupt2;
	395	return 0;
	396	}