1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2006,2007 Daniel Mack
4 */
5
6 #include <linux/device.h>
7 #include <linux/usb.h>
8 #include <linux/gfp.h>
9 #include <sound/rawmidi.h>
10 #include <sound/core.h>
11 #include <sound/pcm.h>
12
13 #include "device.h"
14 #include "midi.h"
15
16 static int snd_usb_caiaq_midi_input_open(struct snd_rawmidi_substream *substream)
17 {
18 return 0;
19 }
20
21 static int snd_usb_caiaq_midi_input_close(struct snd_rawmidi_substream *substream)
22 {
23 return 0;
24 }
25
26 static void snd_usb_caiaq_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
27 {
28 struct snd_usb_caiaqdev *cdev = substream->rmidi->private_data;
29
30 if (!cdev)
31 return;
32
33 cdev->midi_receive_substream = up ? substream : NULL;
34 }
35
36
37 static int snd_usb_caiaq_midi_output_open(struct snd_rawmidi_substream *substream)
38 {
39 return 0;
40 }
41
42 static int snd_usb_caiaq_midi_output_close(struct snd_rawmidi_substream *substream)
43 {
44 struct snd_usb_caiaqdev *cdev = substream->rmidi->private_data;
45 if (cdev->midi_out_active) {
46 usb_kill_urb(&cdev->midi_out_urb);
47 cdev->midi_out_active = 0;
48 }
49 return 0;
50 }
51
52 static void snd_usb_caiaq_midi_send(struct snd_usb_caiaqdev *cdev,
53 struct snd_rawmidi_substream *substream)
54 {
55 int len, ret;
56 struct device *dev = caiaqdev_to_dev(cdev);
57
58 cdev->midi_out_buf[0] = EP1_CMD_MIDI_WRITE;
59 cdev->midi_out_buf[1] = 0; /* port */
60 len = snd_rawmidi_transmit(substream, cdev->midi_out_buf + 3,
61 EP1_BUFSIZE - 3);
62
63 if (len <= 0)
64 return;
65
66 cdev->midi_out_buf[2] = len;
67 cdev->midi_out_urb.transfer_buffer_length = len+3;
68
69 ret = usb_submit_urb(&cdev->midi_out_urb, GFP_ATOMIC);
70 if (ret < 0)
71 dev_err(dev,
72 "snd_usb_caiaq_midi_send(%p): usb_submit_urb() failed,"
73 "ret=%d, len=%d\n", substream, ret, len);
74 else
75 cdev->midi_out_active = 1;
76 }
77
78 static void snd_usb_caiaq_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
79 {
80 struct snd_usb_caiaqdev *cdev = substream->rmidi->private_data;
81
82 if (up) {
83 cdev->midi_out_substream = substream;
84 if (!cdev->midi_out_active)
85 snd_usb_caiaq_midi_send(cdev, substream);
86 } else {
87 cdev->midi_out_substream = NULL;
88 }
89 }
90
91
92 static const struct snd_rawmidi_ops snd_usb_caiaq_midi_output =
93 {
94 .open = snd_usb_caiaq_midi_output_open,
95 .close = snd_usb_caiaq_midi_output_close,
96 .trigger = snd_usb_caiaq_midi_output_trigger,
97 };
98
99 static const struct snd_rawmidi_ops snd_usb_caiaq_midi_input =
100 {
101 .open = snd_usb_caiaq_midi_input_open,
102 .close = snd_usb_caiaq_midi_input_close,
103 .trigger = snd_usb_caiaq_midi_input_trigger,
104 };
105
106 void snd_usb_caiaq_midi_handle_input(struct snd_usb_caiaqdev *cdev,
107 int port, const char *buf, int len)
108 {
109 if (!cdev->midi_receive_substream)
110 return;
111
112 snd_rawmidi_receive(cdev->midi_receive_substream, buf, len);
113 }
114
115 int snd_usb_caiaq_midi_init(struct snd_usb_caiaqdev *device)
116 {
117 int ret;
118 struct snd_rawmidi *rmidi;
119
120 ret = snd_rawmidi_new(device->chip.card, device->product_name, 0,
121 device->spec.num_midi_out,
122 device->spec.num_midi_in,
123 &rmidi);
124
125 if (ret < 0)
126 return ret;
127
128 strscpy(rmidi->name, device->product_name, sizeof(rmidi->name));
129
130 rmidi->info_flags = SNDRV_RAWMIDI_INFO_DUPLEX;
131 rmidi->private_data = device;
132
133 if (device->spec.num_midi_out > 0) {
134 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
135 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
136 &snd_usb_caiaq_midi_output);
137 }
138
139 if (device->spec.num_midi_in > 0) {
140 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
141 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
142 &snd_usb_caiaq_midi_input);
143 }
144
145 device->rmidi = rmidi;
146
147 return 0;
148 }
149
150 void snd_usb_caiaq_midi_output_done(struct urb* urb)
151 {
152 struct snd_usb_caiaqdev *cdev = urb->context;
153
154 cdev->midi_out_active = 0;
155 if (urb->status != 0)
156 return;
157
158 if (!cdev->midi_out_substream)
159 return;
160
161 snd_usb_caiaq_midi_send(cdev, cdev->midi_out_substream);
162 }
163
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