1/*
2 *   Copyright (c) 2006,2007 Daniel Mack
3 *
4 *   This program is free software; you can redistribute it and/or modify
5 *   it under the terms of the GNU General Public License as published by
6 *   the Free Software Foundation; either version 2 of the License, or
7 *   (at your option) any later version.
8 *
9 *   This program is distributed in the hope that it will be useful,
10 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
11 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 *   GNU General Public License for more details.
13 *
14 *   You should have received a copy of the GNU General Public License
15 *   along with this program; if not, write to the Free Software
16 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
17*/
18
19#include <linux/device.h>
20#include <linux/usb.h>
21#include <linux/gfp.h>
22#include <sound/rawmidi.h>
23#include <sound/core.h>
24#include <sound/pcm.h>
25
26#include "device.h"
27#include "midi.h"
28
29static int snd_usb_caiaq_midi_input_open(struct snd_rawmidi_substream *substream)
30{
31	return 0;
32}
33
34static int snd_usb_caiaq_midi_input_close(struct snd_rawmidi_substream *substream)
35{
36	return 0;
37}
38
39static void snd_usb_caiaq_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
40{
41	struct snd_usb_caiaqdev *cdev = substream->rmidi->private_data;
42
43	if (!cdev)
44		return;
45
46	cdev->midi_receive_substream = up ? substream : NULL;
47}
48
49
50static int snd_usb_caiaq_midi_output_open(struct snd_rawmidi_substream *substream)
51{
52	return 0;
53}
54
55static int snd_usb_caiaq_midi_output_close(struct snd_rawmidi_substream *substream)
56{
57	struct snd_usb_caiaqdev *cdev = substream->rmidi->private_data;
58	if (cdev->midi_out_active) {
59		usb_kill_urb(&cdev->midi_out_urb);
60		cdev->midi_out_active = 0;
61	}
62	return 0;
63}
64
65static void snd_usb_caiaq_midi_send(struct snd_usb_caiaqdev *cdev,
66				    struct snd_rawmidi_substream *substream)
67{
68	int len, ret;
69	struct device *dev = caiaqdev_to_dev(cdev);
70
71	cdev->midi_out_buf[0] = EP1_CMD_MIDI_WRITE;
72	cdev->midi_out_buf[1] = 0; /* port */
73	len = snd_rawmidi_transmit(substream, cdev->midi_out_buf + 3,
74				   EP1_BUFSIZE - 3);
75
76	if (len <= 0)
77		return;
78
79	cdev->midi_out_buf[2] = len;
80	cdev->midi_out_urb.transfer_buffer_length = len+3;
81
82	ret = usb_submit_urb(&cdev->midi_out_urb, GFP_ATOMIC);
83	if (ret < 0)
84		dev_err(dev,
85			"snd_usb_caiaq_midi_send(%p): usb_submit_urb() failed,"
86			"ret=%d, len=%d\n", substream, ret, len);
87	else
88		cdev->midi_out_active = 1;
89}
90
91static void snd_usb_caiaq_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
92{
93	struct snd_usb_caiaqdev *cdev = substream->rmidi->private_data;
94
95	if (up) {
96		cdev->midi_out_substream = substream;
97		if (!cdev->midi_out_active)
98			snd_usb_caiaq_midi_send(cdev, substream);
99	} else {
100		cdev->midi_out_substream = NULL;
101	}
102}
103
104
105static struct snd_rawmidi_ops snd_usb_caiaq_midi_output =
106{
107	.open =		snd_usb_caiaq_midi_output_open,
108	.close =	snd_usb_caiaq_midi_output_close,
109	.trigger =      snd_usb_caiaq_midi_output_trigger,
110};
111
112static struct snd_rawmidi_ops snd_usb_caiaq_midi_input =
113{
114	.open =		snd_usb_caiaq_midi_input_open,
115	.close =	snd_usb_caiaq_midi_input_close,
116	.trigger =      snd_usb_caiaq_midi_input_trigger,
117};
118
119void snd_usb_caiaq_midi_handle_input(struct snd_usb_caiaqdev *cdev,
120				     int port, const char *buf, int len)
121{
122	if (!cdev->midi_receive_substream)
123		return;
124
125	snd_rawmidi_receive(cdev->midi_receive_substream, buf, len);
126}
127
128int snd_usb_caiaq_midi_init(struct snd_usb_caiaqdev *device)
129{
130	int ret;
131	struct snd_rawmidi *rmidi;
132
133	ret = snd_rawmidi_new(device->chip.card, device->product_name, 0,
134					device->spec.num_midi_out,
135					device->spec.num_midi_in,
136					&rmidi);
137
138	if (ret < 0)
139		return ret;
140
141	strlcpy(rmidi->name, device->product_name, sizeof(rmidi->name));
142
143	rmidi->info_flags = SNDRV_RAWMIDI_INFO_DUPLEX;
144	rmidi->private_data = device;
145
146	if (device->spec.num_midi_out > 0) {
147		rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
148		snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
149				    &snd_usb_caiaq_midi_output);
150	}
151
152	if (device->spec.num_midi_in > 0) {
153		rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
154		snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
155				    &snd_usb_caiaq_midi_input);
156	}
157
158	device->rmidi = rmidi;
159
160	return 0;
161}
162
163void snd_usb_caiaq_midi_output_done(struct urb* urb)
164{
165	struct snd_usb_caiaqdev *cdev = urb->context;
166
167	cdev->midi_out_active = 0;
168	if (urb->status != 0)
169		return;
170
171	if (!cdev->midi_out_substream)
172		return;
173
174	snd_usb_caiaq_midi_send(cdev, cdev->midi_out_substream);
175}
176