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(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, buffer: 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(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(substream: cdev->midi_receive_substream, buffer: buf, count: 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(card: device->chip.card, id: device->product_name, device: 0, |
121 | output_count: device->spec.num_midi_out, |
122 | input_count: device->spec.num_midi_in, |
123 | rmidi: &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, stream: SNDRV_RAWMIDI_STREAM_OUTPUT, |
136 | ops: &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, stream: SNDRV_RAWMIDI_STREAM_INPUT, |
142 | ops: &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, substream: cdev->midi_out_substream); |
162 | } |
163 | |