[mirror_ubuntu-zesty-kernel.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)
		dev_err(emu->card->dev,
			"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) {
		dev_err(emu->card->dev,
			"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 = rmidi->private_data;
	midi->interrupt = NULL;
	midi->rmidi = NULL;
}

static int 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 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 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)
6f002b02 TI	67	dev_err(emu->card->dev,
	68	"cmd: clear rx timeout (status = 0x%x)\n",
	69	mpu401_read_stat(emu, mpu));
1da177e4 LT	70	#endif
	71	}
	72
	73	/*
	74
	75	*/
	76
eb4698f3	77	static void do_emu10k1_midi_interrupt(struct snd_emu10k1 emu, struct snd_emu10k1_midi midi, unsigned int status)
1da177e4 LT	78	{
	79	unsigned char byte;
	80
	81	if (midi->rmidi == NULL) {
	82	snd_emu10k1_intr_disable(emu, midi->tx_enable \| midi->rx_enable);
	83	return;
	84	}
	85
	86	spin_lock(&midi->input_lock);
	87	if ((status & midi->ipr_rx) && mpu401_input_avail(emu, midi)) {
	88	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
	89	mpu401_clear_rx(emu, midi);
	90	} else {
	91	byte = mpu401_read_data(emu, midi);
	92	if (midi->substream_input)
	93	snd_rawmidi_receive(midi->substream_input, &byte, 1);
	94	}
	95	}
	96	spin_unlock(&midi->input_lock);
	97
	98	spin_lock(&midi->output_lock);
	99	if ((status & midi->ipr_tx) && mpu401_output_ready(emu, midi)) {
	100	if (midi->substream_output &&
	101	snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
	102	mpu401_write_data(emu, midi, byte);
	103	} else {
	104	snd_emu10k1_intr_disable(emu, midi->tx_enable);
	105	}
	106	}
	107	spin_unlock(&midi->output_lock);
	108	}
	109
eb4698f3	110	static void snd_emu10k1_midi_interrupt(struct snd_emu10k1 *emu, unsigned int status)
1da177e4 LT	111	{
	112	do_emu10k1_midi_interrupt(emu, &emu->midi, status);
	113	}
	114
eb4698f3	115	static void snd_emu10k1_midi_interrupt2(struct snd_emu10k1 *emu, unsigned int status)
1da177e4 LT	116	{
	117	do_emu10k1_midi_interrupt(emu, &emu->midi2, status);
	118	}
	119
b130807d	120	static int snd_emu10k1_midi_cmd(struct snd_emu10k1 * emu, struct snd_emu10k1_midi *midi, unsigned char cmd, int ack)
1da177e4 LT	121	{
	122	unsigned long flags;
	123	int timeout, ok;
	124
	125	spin_lock_irqsave(&midi->input_lock, flags);
	126	mpu401_write_data(emu, midi, 0x00);
	127	/* mpu401_clear_rx(emu, midi); */
	128
	129	mpu401_write_cmd(emu, midi, cmd);
	130	if (ack) {
	131	ok = 0;
	132	timeout = 10000;
	133	while (!ok && timeout-- > 0) {
	134	if (mpu401_input_avail(emu, midi)) {
	135	if (mpu401_read_data(emu, midi) == MPU401_ACK)
	136	ok = 1;
	137	}
	138	}
	139	if (!ok && mpu401_read_data(emu, midi) == MPU401_ACK)
	140	ok = 1;
	141	} else {
	142	ok = 1;
	143	}
	144	spin_unlock_irqrestore(&midi->input_lock, flags);
b130807d	145	if (!ok) {
6f002b02 TI	146	dev_err(emu->card->dev,
6f002b02 TI	147	"midi_cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)!!!\n",
1da177e4 LT	148	cmd, emu->port,
	149	mpu401_read_stat(emu, midi),
	150	mpu401_read_data(emu, midi));
b130807d RD	151	return 1;
	152	}
	153	return 0;
1da177e4 LT	154	}
1da177e4 LT	155
eb4698f3	156	static int snd_emu10k1_midi_input_open(struct snd_rawmidi_substream *substream)
1da177e4	157	{
eb4698f3 TI	158	struct snd_emu10k1 *emu;
eb4698f3 TI	159	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4 LT	160	unsigned long flags;
	161
	162	emu = midi->emu;
da3cec35 TI	163	if (snd_BUG_ON(!emu))
da3cec35 TI	164	return -ENXIO;
1da177e4 LT	165	spin_lock_irqsave(&midi->open_lock, flags);
	166	midi->midi_mode \|= EMU10K1_MIDI_MODE_INPUT;
	167	midi->substream_input = substream;
	168	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
	169	spin_unlock_irqrestore(&midi->open_lock, flags);
b130807d RD	170	if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
	171	goto error_out;
	172	if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
	173	goto error_out;
1da177e4 LT	174	} else {
	175	spin_unlock_irqrestore(&midi->open_lock, flags);
	176	}
	177	return 0;
b130807d RD	178
	179	error_out:
	180	return -EIO;
1da177e4 LT	181	}
1da177e4 LT	182
eb4698f3	183	static int snd_emu10k1_midi_output_open(struct snd_rawmidi_substream *substream)
1da177e4	184	{
eb4698f3 TI	185	struct snd_emu10k1 *emu;
eb4698f3 TI	186	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4 LT	187	unsigned long flags;
	188
	189	emu = midi->emu;
da3cec35 TI	190	if (snd_BUG_ON(!emu))
da3cec35 TI	191	return -ENXIO;
1da177e4 LT	192	spin_lock_irqsave(&midi->open_lock, flags);
	193	midi->midi_mode \|= EMU10K1_MIDI_MODE_OUTPUT;
	194	midi->substream_output = substream;
	195	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
	196	spin_unlock_irqrestore(&midi->open_lock, flags);
b130807d RD	197	if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
	198	goto error_out;
	199	if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
	200	goto error_out;
1da177e4 LT	201	} else {
	202	spin_unlock_irqrestore(&midi->open_lock, flags);
	203	}
	204	return 0;
b130807d RD	205
	206	error_out:
	207	return -EIO;
1da177e4 LT	208	}
1da177e4 LT	209
eb4698f3	210	static int snd_emu10k1_midi_input_close(struct snd_rawmidi_substream *substream)
1da177e4	211	{
eb4698f3 TI	212	struct snd_emu10k1 *emu;
eb4698f3 TI	213	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4	214	unsigned long flags;
b130807d	215	int err = 0;
1da177e4 LT	216
1da177e4 LT	217	emu = midi->emu;
da3cec35 TI	218	if (snd_BUG_ON(!emu))
da3cec35 TI	219	return -ENXIO;
1da177e4 LT	220	spin_lock_irqsave(&midi->open_lock, flags);
	221	snd_emu10k1_intr_disable(emu, midi->rx_enable);
	222	midi->midi_mode &= ~EMU10K1_MIDI_MODE_INPUT;
	223	midi->substream_input = NULL;
	224	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
	225	spin_unlock_irqrestore(&midi->open_lock, flags);
b130807d	226	err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
1da177e4 LT	227	} else {
	228	spin_unlock_irqrestore(&midi->open_lock, flags);
	229	}
b130807d	230	return err;
1da177e4 LT	231	}
1da177e4 LT	232
eb4698f3	233	static int snd_emu10k1_midi_output_close(struct snd_rawmidi_substream *substream)
1da177e4	234	{
eb4698f3 TI	235	struct snd_emu10k1 *emu;
eb4698f3 TI	236	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4	237	unsigned long flags;
b130807d	238	int err = 0;
1da177e4 LT	239
1da177e4 LT	240	emu = midi->emu;
da3cec35 TI	241	if (snd_BUG_ON(!emu))
da3cec35 TI	242	return -ENXIO;
1da177e4 LT	243	spin_lock_irqsave(&midi->open_lock, flags);
	244	snd_emu10k1_intr_disable(emu, midi->tx_enable);
	245	midi->midi_mode &= ~EMU10K1_MIDI_MODE_OUTPUT;
	246	midi->substream_output = NULL;
	247	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
	248	spin_unlock_irqrestore(&midi->open_lock, flags);
b130807d	249	err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
1da177e4 LT	250	} else {
	251	spin_unlock_irqrestore(&midi->open_lock, flags);
	252	}
b130807d	253	return err;
1da177e4 LT	254	}
1da177e4 LT	255
eb4698f3	256	static void snd_emu10k1_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
1da177e4	257	{
eb4698f3 TI	258	struct snd_emu10k1 *emu;
eb4698f3 TI	259	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4	260	emu = midi->emu;
da3cec35 TI	261	if (snd_BUG_ON(!emu))
da3cec35 TI	262	return;
1da177e4 LT	263
	264	if (up)
	265	snd_emu10k1_intr_enable(emu, midi->rx_enable);
	266	else
	267	snd_emu10k1_intr_disable(emu, midi->rx_enable);
	268	}
	269
eb4698f3	270	static void snd_emu10k1_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
1da177e4	271	{
eb4698f3 TI	272	struct snd_emu10k1 *emu;
eb4698f3 TI	273	struct snd_emu10k1_midi midi = (struct snd_emu10k1_midi )substream->rmidi->private_data;
1da177e4 LT	274	unsigned long flags;
	275
	276	emu = midi->emu;
da3cec35 TI	277	if (snd_BUG_ON(!emu))
da3cec35 TI	278	return;
1da177e4 LT	279
	280	if (up) {
	281	int max = 4;
	282	unsigned char byte;
	283
	284	/* try to send some amount of bytes here before interrupts */
	285	spin_lock_irqsave(&midi->output_lock, flags);
	286	while (max > 0) {
	287	if (mpu401_output_ready(emu, midi)) {
	288	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT) \|\|
	289	snd_rawmidi_transmit(substream, &byte, 1) != 1) {
	290	/* no more data */
	291	spin_unlock_irqrestore(&midi->output_lock, flags);
	292	return;
	293	}
	294	mpu401_write_data(emu, midi, byte);
	295	max--;
	296	} else {
	297	break;
	298	}
	299	}
	300	spin_unlock_irqrestore(&midi->output_lock, flags);
	301	snd_emu10k1_intr_enable(emu, midi->tx_enable);
	302	} else {
	303	snd_emu10k1_intr_disable(emu, midi->tx_enable);
	304	}
	305	}
	306
	307	/*
	308
	309	*/
	310
eb4698f3	311	static struct snd_rawmidi_ops snd_emu10k1_midi_output =
1da177e4 LT	312	{
	313	.open = snd_emu10k1_midi_output_open,
	314	.close = snd_emu10k1_midi_output_close,
	315	.trigger = snd_emu10k1_midi_output_trigger,
	316	};
	317
eb4698f3	318	static struct snd_rawmidi_ops snd_emu10k1_midi_input =
1da177e4 LT	319	{
	320	.open = snd_emu10k1_midi_input_open,
	321	.close = snd_emu10k1_midi_input_close,
	322	.trigger = snd_emu10k1_midi_input_trigger,
	323	};
	324
eb4698f3	325	static void snd_emu10k1_midi_free(struct snd_rawmidi *rmidi)
1da177e4	326	{
9fe856e4	327	struct snd_emu10k1_midi *midi = rmidi->private_data;
1da177e4 LT	328	midi->interrupt = NULL;
	329	midi->rmidi = NULL;
	330	}
	331
e23e7a14	332	static int emu10k1_midi_init(struct snd_emu10k1 emu, struct snd_emu10k1_midi midi, int device, char *name)
1da177e4	333	{
eb4698f3	334	struct snd_rawmidi *rmidi;
1da177e4 LT	335	int err;
	336
	337	if ((err = snd_rawmidi_new(emu->card, name, device, 1, 1, &rmidi)) < 0)
	338	return err;
	339	midi->emu = emu;
	340	spin_lock_init(&midi->open_lock);
	341	spin_lock_init(&midi->input_lock);
	342	spin_lock_init(&midi->output_lock);
	343	strcpy(rmidi->name, name);
	344	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_emu10k1_midi_output);
	345	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_emu10k1_midi_input);
	346	rmidi->info_flags \|= SNDRV_RAWMIDI_INFO_OUTPUT \|
	347	SNDRV_RAWMIDI_INFO_INPUT \|
	348	SNDRV_RAWMIDI_INFO_DUPLEX;
	349	rmidi->private_data = midi;
	350	rmidi->private_free = snd_emu10k1_midi_free;
	351	midi->rmidi = rmidi;
	352	return 0;
	353	}
	354
e23e7a14	355	int snd_emu10k1_midi(struct snd_emu10k1 *emu)
1da177e4	356	{
eb4698f3	357	struct snd_emu10k1_midi *midi = &emu->midi;
1da177e4 LT	358	int err;
	359
	360	if ((err = emu10k1_midi_init(emu, midi, 0, "EMU10K1 MPU-401 (UART)")) < 0)
	361	return err;
	362
	363	midi->tx_enable = INTE_MIDITXENABLE;
	364	midi->rx_enable = INTE_MIDIRXENABLE;
	365	midi->port = MUDATA;
	366	midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
	367	midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
	368	midi->interrupt = snd_emu10k1_midi_interrupt;
	369	return 0;
	370	}
	371
e23e7a14	372	int snd_emu10k1_audigy_midi(struct snd_emu10k1 *emu)
1da177e4	373	{
eb4698f3	374	struct snd_emu10k1_midi *midi;
1da177e4 LT	375	int err;
	376
	377	midi = &emu->midi;
	378	if ((err = emu10k1_midi_init(emu, midi, 0, "Audigy MPU-401 (UART)")) < 0)
	379	return err;
	380
	381	midi->tx_enable = INTE_MIDITXENABLE;
	382	midi->rx_enable = INTE_MIDIRXENABLE;
	383	midi->port = A_MUDATA1;
	384	midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
	385	midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
	386	midi->interrupt = snd_emu10k1_midi_interrupt;
	387
	388	midi = &emu->midi2;
	389	if ((err = emu10k1_midi_init(emu, midi, 1, "Audigy MPU-401 #2")) < 0)
	390	return err;
	391
	392	midi->tx_enable = INTE_A_MIDITXENABLE2;
	393	midi->rx_enable = INTE_A_MIDIRXENABLE2;
	394	midi->port = A_MUDATA2;
	395	midi->ipr_tx = IPR_A_MIDITRANSBUFEMPTY2;
	396	midi->ipr_rx = IPR_A_MIDIRECVBUFEMPTY2;
	397	midi->interrupt = snd_emu10k1_midi_interrupt2;
	398	return 0;
	399	}