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/usb.h>
20 #include <sound/rawmidi.h>
21 #include <sound/core.h>
22 #include <sound/pcm.h>
23
24 #include "device.h"
25 #include "midi.h"
26
27 static int snd_usb_caiaq_midi_input_open(struct snd_rawmidi_substream *substream)
28 {
29 return 0;
30 }
31
32 static int snd_usb_caiaq_midi_input_close(struct snd_rawmidi_substream *substream)
33 {
34 return 0;
35 }
36
37 static void snd_usb_caiaq_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
38 {
39 struct snd_usb_caiaqdev *dev = substream->rmidi->private_data;
40
41 if (!dev)
42 return;
43
44 dev->midi_receive_substream = up ? substream : NULL;
45 }
46
47
48 static int snd_usb_caiaq_midi_output_open(struct snd_rawmidi_substream *substream)
49 {
50 return 0;
51 }
52
53 static int snd_usb_caiaq_midi_output_close(struct snd_rawmidi_substream *substream)
54 {
55 struct snd_usb_caiaqdev *dev = substream->rmidi->private_data;
56 if (dev->midi_out_active) {
57 usb_kill_urb(&dev->midi_out_urb);
58 dev->midi_out_active = 0;
59 }
60 return 0;
61 }
62
63 static void snd_usb_caiaq_midi_send(struct snd_usb_caiaqdev *dev,
64 struct snd_rawmidi_substream *substream)
65 {
66 int len, ret;
67
68 dev->midi_out_buf[0] = EP1_CMD_MIDI_WRITE;
69 dev->midi_out_buf[1] = 0; /* port */
70 len = snd_rawmidi_transmit(substream, dev->midi_out_buf + 3,
71 EP1_BUFSIZE - 3);
72
73 if (len <= 0)
74 return;
75
76 dev->midi_out_buf[2] = len;
77 dev->midi_out_urb.transfer_buffer_length = len+3;
78
79 ret = usb_submit_urb(&dev->midi_out_urb, GFP_ATOMIC);
80 if (ret < 0)
81 log("snd_usb_caiaq_midi_send(%p): usb_submit_urb() failed,"
82 "ret=%d, len=%d\n",
83 substream, ret, len);
84 else
85 dev->midi_out_active = 1;
86 }
87
88 static void snd_usb_caiaq_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
89 {
90 struct snd_usb_caiaqdev *dev = substream->rmidi->private_data;
91
92 if (up) {
93 dev->midi_out_substream = substream;
94 if (!dev->midi_out_active)
95 snd_usb_caiaq_midi_send(dev, substream);
96 } else {
97 dev->midi_out_substream = NULL;
98 }
99 }
100
101
102 static struct snd_rawmidi_ops snd_usb_caiaq_midi_output =
103 {
104 .open = snd_usb_caiaq_midi_output_open,
105 .close = snd_usb_caiaq_midi_output_close,
106 .trigger = snd_usb_caiaq_midi_output_trigger,
107 };
108
109 static struct snd_rawmidi_ops snd_usb_caiaq_midi_input =
110 {
111 .open = snd_usb_caiaq_midi_input_open,
112 .close = snd_usb_caiaq_midi_input_close,
113 .trigger = snd_usb_caiaq_midi_input_trigger,
114 };
115
116 void snd_usb_caiaq_midi_handle_input(struct snd_usb_caiaqdev *dev,
117 int port, const char *buf, int len)
118 {
119 if (!dev->midi_receive_substream)
120 return;
121
122 snd_rawmidi_receive(dev->midi_receive_substream, buf, len);
123 }
124
125 int snd_usb_caiaq_midi_init(struct snd_usb_caiaqdev *device)
126 {
127 int ret;
128 struct snd_rawmidi *rmidi;
129
130 ret = snd_rawmidi_new(device->chip.card, device->product_name, 0,
131 device->spec.num_midi_out,
132 device->spec.num_midi_in,
133 &rmidi);
134
135 if (ret < 0)
136 return ret;
137
138 strcpy(rmidi->name, device->product_name);
139
140 rmidi->info_flags = SNDRV_RAWMIDI_INFO_DUPLEX;
141 rmidi->private_data = device;
142
143 if (device->spec.num_midi_out > 0) {
144 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
145 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
146 &snd_usb_caiaq_midi_output);
147 }
148
149 if (device->spec.num_midi_in > 0) {
150 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
151 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
152 &snd_usb_caiaq_midi_input);
153 }
154
155 device->rmidi = rmidi;
156
157 return 0;
158 }
159
160 void snd_usb_caiaq_midi_output_done(struct urb* urb)
161 {
162 struct snd_usb_caiaqdev *dev = urb->context;
163
164 dev->midi_out_active = 0;
165 if (urb->status != 0)
166 return;
167
168 if (!dev->midi_out_substream)
169 return;
170
171 snd_usb_caiaq_midi_send(dev, dev->midi_out_substream);
172 }
173
174
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