[deliverable/linux.git] / sound / pci / emu10k1 / emumpu401.c

/*
 *  Copyright (c) by Jaroslav Kysela <perex@suse.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(emu10k1_t *emu, emu10k1_midi_t *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(emu10k1_t *emu, emu10k1_midi_t *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(emu10k1_t *emu, emu10k1_midi_t *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(emu10k1_t *emu, emu10k1_midi_t *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(emu10k1_t *emu, unsigned int status)
{
	do_emu10k1_midi_interrupt(emu, &emu->midi, status);
}

static void snd_emu10k1_midi_interrupt2(emu10k1_t *emu, unsigned int status)
{
	do_emu10k1_midi_interrupt(emu, &emu->midi2, status);
}

static void snd_emu10k1_midi_cmd(emu10k1_t * emu, emu10k1_midi_t *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));
}

static int snd_emu10k1_midi_input_open(snd_rawmidi_substream_t * substream)
{
	emu10k1_t *emu;
	emu10k1_midi_t *midi = (emu10k1_midi_t *)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);
		snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1);
		snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1);
	} else {
		spin_unlock_irqrestore(&midi->open_lock, flags);
	}
	return 0;
}

static int snd_emu10k1_midi_output_open(snd_rawmidi_substream_t * substream)
{
	emu10k1_t *emu;
	emu10k1_midi_t *midi = (emu10k1_midi_t *)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);
		snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1);
		snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1);
	} else {
		spin_unlock_irqrestore(&midi->open_lock, flags);
	}
	return 0;
}

static int snd_emu10k1_midi_input_close(snd_rawmidi_substream_t * substream)
{
	emu10k1_t *emu;
	emu10k1_midi_t *midi = (emu10k1_midi_t *)substream->rmidi->private_data;
	unsigned long flags;

	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);
		snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
	} else {
		spin_unlock_irqrestore(&midi->open_lock, flags);
	}
	return 0;
}

static int snd_emu10k1_midi_output_close(snd_rawmidi_substream_t * substream)
{
	emu10k1_t *emu;
	emu10k1_midi_t *midi = (emu10k1_midi_t *)substream->rmidi->private_data;
	unsigned long flags;

	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);
		snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
	} else {
		spin_unlock_irqrestore(&midi->open_lock, flags);
	}
	return 0;
}

static void snd_emu10k1_midi_input_trigger(snd_rawmidi_substream_t * substream, int up)
{
	emu10k1_t *emu;
	emu10k1_midi_t *midi = (emu10k1_midi_t *)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(snd_rawmidi_substream_t * substream, int up)
{
	emu10k1_t *emu;
	emu10k1_midi_t *midi = (emu10k1_midi_t *)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 snd_rawmidi_ops_t snd_emu10k1_midi_output =
{
	.open =		snd_emu10k1_midi_output_open,
	.close =	snd_emu10k1_midi_output_close,
	.trigger =	snd_emu10k1_midi_output_trigger,
};

static snd_rawmidi_ops_t 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(snd_rawmidi_t *rmidi)
{
	emu10k1_midi_t *midi = (emu10k1_midi_t *)rmidi->private_data;
	midi->interrupt = NULL;
	midi->rmidi = NULL;
}

static int __devinit emu10k1_midi_init(emu10k1_t *emu, emu10k1_midi_t *midi, int device, char *name)
{
	snd_rawmidi_t *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(emu10k1_t *emu)
{
	emu10k1_midi_t *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(emu10k1_t *emu)
{
	emu10k1_midi_t *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 LT	1	/*
	2	* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
	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
	31	static inline unsigned char mpu401_read(emu10k1_t emu, emu10k1_midi_t mpu, int idx)
	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
	39	static inline void mpu401_write(emu10k1_t emu, emu10k1_midi_t mpu, int data, int idx)
	40	{
	41	if (emu->audigy)
	42	snd_emu10k1_ptr_write(emu, mpu->port + idx, 0, data);
	43	else
	44	outb(data, emu->port + mpu->port + idx);
	45	}
	46
	47	#define mpu401_write_data(emu, mpu, data) mpu401_write(emu, mpu, data, 0)
	48	#define mpu401_write_cmd(emu, mpu, data) mpu401_write(emu, mpu, data, 1)
	49	#define mpu401_read_data(emu, mpu) mpu401_read(emu, mpu, 0)
	50	#define mpu401_read_stat(emu, mpu) mpu401_read(emu, mpu, 1)
	51
	52	#define mpu401_input_avail(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x80))
	53	#define mpu401_output_ready(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x40))
	54
	55	#define MPU401_RESET 0xff
	56	#define MPU401_ENTER_UART 0x3f
	57	#define MPU401_ACK 0xfe
	58
	59	static void mpu401_clear_rx(emu10k1_t emu, emu10k1_midi_t mpu)
	60	{
	61	int timeout = 100000;
	62	for (; timeout > 0 && mpu401_input_avail(emu, mpu); timeout--)
	63	mpu401_read_data(emu, mpu);
	64	#ifdef CONFIG_SND_DEBUG
65	if (timeout <= 0)
66	snd_printk(KERN_ERR "cmd: clear rx timeout (status = 0x%x)\n", mpu401_read_stat(emu, mpu));
67	#endif
68	}
69
70	/*
71
72	*/
73
74	static void do_emu10k1_midi_interrupt(emu10k1_t emu, emu10k1_midi_t midi, unsigned int status)
75	{
76	unsigned char byte;
77
78	if (midi->rmidi == NULL) {
79	snd_emu10k1_intr_disable(emu, midi->tx_enable \| midi->rx_enable);
80	return;
81	}
82
83	spin_lock(&midi->input_lock);
84	if ((status & midi->ipr_rx) && mpu401_input_avail(emu, midi)) {
85	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
86	mpu401_clear_rx(emu, midi);
87	} else {
88	byte = mpu401_read_data(emu, midi);
89	if (midi->substream_input)
90	snd_rawmidi_receive(midi->substream_input, &byte, 1);
91	}
92	}
93	spin_unlock(&midi->input_lock);
94
95	spin_lock(&midi->output_lock);
96	if ((status & midi->ipr_tx) && mpu401_output_ready(emu, midi)) {
97	if (midi->substream_output &&
98	snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
99	mpu401_write_data(emu, midi, byte);
100	} else {
101	snd_emu10k1_intr_disable(emu, midi->tx_enable);
102	}
103	}
104	spin_unlock(&midi->output_lock);
105	}
106
107	static void snd_emu10k1_midi_interrupt(emu10k1_t *emu, unsigned int status)
108	{
109	do_emu10k1_midi_interrupt(emu, &emu->midi, status);
110	}
111
112	static void snd_emu10k1_midi_interrupt2(emu10k1_t *emu, unsigned int status)
113	{
114	do_emu10k1_midi_interrupt(emu, &emu->midi2, status);
115	}
116
117	static void snd_emu10k1_midi_cmd(emu10k1_t * emu, emu10k1_midi_t *midi, unsigned char cmd, int ack)
118	{
119	unsigned long flags;
120	int timeout, ok;
121
122	spin_lock_irqsave(&midi->input_lock, flags);
123	mpu401_write_data(emu, midi, 0x00);
124	/* mpu401_clear_rx(emu, midi); */
125
126	mpu401_write_cmd(emu, midi, cmd);
127	if (ack) {
128	ok = 0;
129	timeout = 10000;
130	while (!ok && timeout-- > 0) {
131	if (mpu401_input_avail(emu, midi)) {
132	if (mpu401_read_data(emu, midi) == MPU401_ACK)
133	ok = 1;
134	}
135	}
136	if (!ok && mpu401_read_data(emu, midi) == MPU401_ACK)
137	ok = 1;
138	} else {
139	ok = 1;
140	}
141	spin_unlock_irqrestore(&midi->input_lock, flags);
142	if (!ok)
143	snd_printk(KERN_ERR "midi_cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)!!!\n",
144	cmd, emu->port,
145	mpu401_read_stat(emu, midi),
146	mpu401_read_data(emu, midi));
147	}
148
149	static int snd_emu10k1_midi_input_open(snd_rawmidi_substream_t * substream)
150	{
151	emu10k1_t *emu;
152	emu10k1_midi_t midi = (emu10k1_midi_t )substream->rmidi->private_data;
153	unsigned long flags;
154
155	emu = midi->emu;
156	snd_assert(emu, return -ENXIO);
157	spin_lock_irqsave(&midi->open_lock, flags);
158	midi->midi_mode \|= EMU10K1_MIDI_MODE_INPUT;
159	midi->substream_input = substream;
160	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
161	spin_unlock_irqrestore(&midi->open_lock, flags);
162	snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1);
163	snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1);
164	} else {
165	spin_unlock_irqrestore(&midi->open_lock, flags);
166	}
167	return 0;
168	}
169
170	static int snd_emu10k1_midi_output_open(snd_rawmidi_substream_t * substream)
171	{
172	emu10k1_t *emu;
173	emu10k1_midi_t midi = (emu10k1_midi_t )substream->rmidi->private_data;
174	unsigned long flags;
175
176	emu = midi->emu;
177	snd_assert(emu, return -ENXIO);
178	spin_lock_irqsave(&midi->open_lock, flags);
179	midi->midi_mode \|= EMU10K1_MIDI_MODE_OUTPUT;
180	midi->substream_output = substream;
181	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
182	spin_unlock_irqrestore(&midi->open_lock, flags);
183	snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1);
184	snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1);
185	} else {
186	spin_unlock_irqrestore(&midi->open_lock, flags);
187	}
188	return 0;
189	}
190
191	static int snd_emu10k1_midi_input_close(snd_rawmidi_substream_t * substream)
192	{
193	emu10k1_t *emu;
194	emu10k1_midi_t midi = (emu10k1_midi_t )substream->rmidi->private_data;
195	unsigned long flags;
196
197	emu = midi->emu;
198	snd_assert(emu, return -ENXIO);
199	spin_lock_irqsave(&midi->open_lock, flags);
200	snd_emu10k1_intr_disable(emu, midi->rx_enable);
201	midi->midi_mode &= ~EMU10K1_MIDI_MODE_INPUT;
202	midi->substream_input = NULL;
203	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
204	spin_unlock_irqrestore(&midi->open_lock, flags);
205	snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
206	} else {
207	spin_unlock_irqrestore(&midi->open_lock, flags);
208	}
209	return 0;
210	}
211
212	static int snd_emu10k1_midi_output_close(snd_rawmidi_substream_t * substream)
213	{
214	emu10k1_t *emu;
215	emu10k1_midi_t midi = (emu10k1_midi_t )substream->rmidi->private_data;
216	unsigned long flags;
217
218	emu = midi->emu;
219	snd_assert(emu, return -ENXIO);
220	spin_lock_irqsave(&midi->open_lock, flags);
221	snd_emu10k1_intr_disable(emu, midi->tx_enable);
222	midi->midi_mode &= ~EMU10K1_MIDI_MODE_OUTPUT;
223	midi->substream_output = NULL;
224	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
225	spin_unlock_irqrestore(&midi->open_lock, flags);
226	snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
227	} else {
228	spin_unlock_irqrestore(&midi->open_lock, flags);
229	}
230	return 0;
231	}
232
233	static void snd_emu10k1_midi_input_trigger(snd_rawmidi_substream_t * substream, int up)
234	{
235	emu10k1_t *emu;
236	emu10k1_midi_t midi = (emu10k1_midi_t )substream->rmidi->private_data;
237	emu = midi->emu;
238	snd_assert(emu, return);
239
240	if (up)
241	snd_emu10k1_intr_enable(emu, midi->rx_enable);
242	else
243	snd_emu10k1_intr_disable(emu, midi->rx_enable);
244	}
245
246	static void snd_emu10k1_midi_output_trigger(snd_rawmidi_substream_t * substream, int up)
247	{
248	emu10k1_t *emu;
249	emu10k1_midi_t midi = (emu10k1_midi_t )substream->rmidi->private_data;
250	unsigned long flags;
251
252	emu = midi->emu;
253	snd_assert(emu, return);
254
255	if (up) {
256	int max = 4;
257	unsigned char byte;
258
259	/* try to send some amount of bytes here before interrupts */
260	spin_lock_irqsave(&midi->output_lock, flags);
261	while (max > 0) {
262	if (mpu401_output_ready(emu, midi)) {
263	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT) \|\|
264	snd_rawmidi_transmit(substream, &byte, 1) != 1) {
265	/* no more data */
266	spin_unlock_irqrestore(&midi->output_lock, flags);
267	return;
268	}
269	mpu401_write_data(emu, midi, byte);
270	max--;
271	} else {
272	break;
273	}
274	}
275	spin_unlock_irqrestore(&midi->output_lock, flags);
276	snd_emu10k1_intr_enable(emu, midi->tx_enable);
277	} else {
278	snd_emu10k1_intr_disable(emu, midi->tx_enable);
279	}
280	}
281
282	/*
283
284	*/
285
286	static snd_rawmidi_ops_t snd_emu10k1_midi_output =
287	{
288	.open = snd_emu10k1_midi_output_open,
289	.close = snd_emu10k1_midi_output_close,
290	.trigger = snd_emu10k1_midi_output_trigger,
291	};
292
293	static snd_rawmidi_ops_t snd_emu10k1_midi_input =
294	{
295	.open = snd_emu10k1_midi_input_open,
296	.close = snd_emu10k1_midi_input_close,
297	.trigger = snd_emu10k1_midi_input_trigger,
298	};
299
300	static void snd_emu10k1_midi_free(snd_rawmidi_t *rmidi)
301	{
302	emu10k1_midi_t midi = (emu10k1_midi_t )rmidi->private_data;
303	midi->interrupt = NULL;
304	midi->rmidi = NULL;
305	}
306
307	static int __devinit emu10k1_midi_init(emu10k1_t emu, emu10k1_midi_t midi, int device, char *name)
308	{
309	snd_rawmidi_t *rmidi;
310	int err;
311
312	if ((err = snd_rawmidi_new(emu->card, name, device, 1, 1, &rmidi)) < 0)
313	return err;
314	midi->emu = emu;
315	spin_lock_init(&midi->open_lock);
316	spin_lock_init(&midi->input_lock);
317	spin_lock_init(&midi->output_lock);
318	strcpy(rmidi->name, name);
319	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_emu10k1_midi_output);
320	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_emu10k1_midi_input);
321	rmidi->info_flags \|= SNDRV_RAWMIDI_INFO_OUTPUT \|
322	SNDRV_RAWMIDI_INFO_INPUT \|
323	SNDRV_RAWMIDI_INFO_DUPLEX;
324	rmidi->private_data = midi;
325	rmidi->private_free = snd_emu10k1_midi_free;
326	midi->rmidi = rmidi;
327	return 0;
328	}
329
330	int __devinit snd_emu10k1_midi(emu10k1_t *emu)
331	{
332	emu10k1_midi_t *midi = &emu->midi;
333	int err;
334
335	if ((err = emu10k1_midi_init(emu, midi, 0, "EMU10K1 MPU-401 (UART)")) < 0)
336	return err;
337
338	midi->tx_enable = INTE_MIDITXENABLE;
339	midi->rx_enable = INTE_MIDIRXENABLE;
340	midi->port = MUDATA;
341	midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
342	midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
343	midi->interrupt = snd_emu10k1_midi_interrupt;
344	return 0;
345	}
346
347	int __devinit snd_emu10k1_audigy_midi(emu10k1_t *emu)
348	{
349	emu10k1_midi_t *midi;
350	int err;
351
352	midi = &emu->midi;
353	if ((err = emu10k1_midi_init(emu, midi, 0, "Audigy MPU-401 (UART)")) < 0)
354	return err;
355
356	midi->tx_enable = INTE_MIDITXENABLE;
357	midi->rx_enable = INTE_MIDIRXENABLE;
358	midi->port = A_MUDATA1;
359	midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
360	midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
361	midi->interrupt = snd_emu10k1_midi_interrupt;
362
363	midi = &emu->midi2;
364	if ((err = emu10k1_midi_init(emu, midi, 1, "Audigy MPU-401 #2")) < 0)
365	return err;
366
367	midi->tx_enable = INTE_A_MIDITXENABLE2;
368	midi->rx_enable = INTE_A_MIDIRXENABLE2;
369	midi->port = A_MUDATA2;
370	midi->ipr_tx = IPR_A_MIDITRANSBUFEMPTY2;
371	midi->ipr_rx = IPR_A_MIDIRECVBUFEMPTY2;
372	midi->interrupt = snd_emu10k1_midi_interrupt2;
373	return 0;
374	}