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12#include <sound/rawmidi.h>
13
14#include "midi.h"
15#include "chip.h"
16#include "comm.h"
17
18enum {
19 MIDI_BUFSIZE = 64
20};
21
22static void usb6fire_midi_out_handler(struct urb *urb)
23{
24 struct midi_runtime *rt = urb->context;
25 int ret;
26 unsigned long flags;
27
28 spin_lock_irqsave(&rt->out_lock, flags);
29
30 if (rt->out) {
31 ret = snd_rawmidi_transmit(rt->out, rt->out_buffer + 4,
32 MIDI_BUFSIZE - 4);
33 if (ret > 0) {
34 rt->out_buffer[1] = ret + 2;
35 rt->out_buffer[3] = rt->out_serial++;
36 urb->transfer_buffer_length = ret + 4;
37
38 ret = usb_submit_urb(urb, GFP_ATOMIC);
39 if (ret < 0)
40 dev_err(&urb->dev->dev,
41 "midi out urb submit failed: %d\n",
42 ret);
43 } else
44 rt->out = NULL;
45 }
46 spin_unlock_irqrestore(&rt->out_lock, flags);
47}
48
49static void usb6fire_midi_in_received(
50 struct midi_runtime *rt, u8 *data, int length)
51{
52 unsigned long flags;
53
54 spin_lock_irqsave(&rt->in_lock, flags);
55 if (rt->in)
56 snd_rawmidi_receive(rt->in, data, length);
57 spin_unlock_irqrestore(&rt->in_lock, flags);
58}
59
60static int usb6fire_midi_out_open(struct snd_rawmidi_substream *alsa_sub)
61{
62 return 0;
63}
64
65static int usb6fire_midi_out_close(struct snd_rawmidi_substream *alsa_sub)
66{
67 return 0;
68}
69
70static void usb6fire_midi_out_trigger(
71 struct snd_rawmidi_substream *alsa_sub, int up)
72{
73 struct midi_runtime *rt = alsa_sub->rmidi->private_data;
74 struct urb *urb = &rt->out_urb;
75 __s8 ret;
76 unsigned long flags;
77
78 spin_lock_irqsave(&rt->out_lock, flags);
79 if (up) {
80 if (rt->out) {
81 spin_unlock_irqrestore(&rt->out_lock, flags);
82 return;
83 }
84
85 ret = snd_rawmidi_transmit(alsa_sub, rt->out_buffer + 4,
86 MIDI_BUFSIZE - 4);
87 if (ret > 0) {
88 rt->out_buffer[1] = ret + 2;
89 rt->out_buffer[3] = rt->out_serial++;
90 urb->transfer_buffer_length = ret + 4;
91
92 ret = usb_submit_urb(urb, GFP_ATOMIC);
93 if (ret < 0)
94 dev_err(&urb->dev->dev,
95 "midi out urb submit failed: %d\n",
96 ret);
97 else
98 rt->out = alsa_sub;
99 }
100 } else if (rt->out == alsa_sub)
101 rt->out = NULL;
102 spin_unlock_irqrestore(&rt->out_lock, flags);
103}
104
105static void usb6fire_midi_out_drain(struct snd_rawmidi_substream *alsa_sub)
106{
107 struct midi_runtime *rt = alsa_sub->rmidi->private_data;
108 int retry = 0;
109
110 while (rt->out && retry++ < 100)
111 msleep(10);
112}
113
114static int usb6fire_midi_in_open(struct snd_rawmidi_substream *alsa_sub)
115{
116 return 0;
117}
118
119static int usb6fire_midi_in_close(struct snd_rawmidi_substream *alsa_sub)
120{
121 return 0;
122}
123
124static void usb6fire_midi_in_trigger(
125 struct snd_rawmidi_substream *alsa_sub, int up)
126{
127 struct midi_runtime *rt = alsa_sub->rmidi->private_data;
128 unsigned long flags;
129
130 spin_lock_irqsave(&rt->in_lock, flags);
131 if (up)
132 rt->in = alsa_sub;
133 else
134 rt->in = NULL;
135 spin_unlock_irqrestore(&rt->in_lock, flags);
136}
137
138static const struct snd_rawmidi_ops out_ops = {
139 .open = usb6fire_midi_out_open,
140 .close = usb6fire_midi_out_close,
141 .trigger = usb6fire_midi_out_trigger,
142 .drain = usb6fire_midi_out_drain
143};
144
145static const struct snd_rawmidi_ops in_ops = {
146 .open = usb6fire_midi_in_open,
147 .close = usb6fire_midi_in_close,
148 .trigger = usb6fire_midi_in_trigger
149};
150
151int usb6fire_midi_init(struct sfire_chip *chip)
152{
153 int ret;
154 struct midi_runtime *rt = kzalloc(sizeof(struct midi_runtime),
155 GFP_KERNEL);
156 struct comm_runtime *comm_rt = chip->comm;
157
158 if (!rt)
159 return -ENOMEM;
160
161 rt->out_buffer = kzalloc(MIDI_BUFSIZE, GFP_KERNEL);
162 if (!rt->out_buffer) {
163 kfree(rt);
164 return -ENOMEM;
165 }
166
167 rt->chip = chip;
168 rt->in_received = usb6fire_midi_in_received;
169 rt->out_buffer[0] = 0x80;
170 rt->out_buffer[1] = 0x00;
171 rt->out_buffer[2] = 0x00;
172 spin_lock_init(&rt->in_lock);
173 spin_lock_init(&rt->out_lock);
174
175 comm_rt->init_urb(comm_rt, &rt->out_urb, rt->out_buffer, rt,
176 usb6fire_midi_out_handler);
177
178 ret = snd_rawmidi_new(chip->card, "6FireUSB", 0, 1, 1, &rt->instance);
179 if (ret < 0) {
180 kfree(rt->out_buffer);
181 kfree(rt);
182 dev_err(&chip->dev->dev, "unable to create midi.\n");
183 return ret;
184 }
185 rt->instance->private_data = rt;
186 strcpy(rt->instance->name, "DMX6FireUSB MIDI");
187 rt->instance->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
188 SNDRV_RAWMIDI_INFO_INPUT |
189 SNDRV_RAWMIDI_INFO_DUPLEX;
190 snd_rawmidi_set_ops(rt->instance, SNDRV_RAWMIDI_STREAM_OUTPUT,
191 &out_ops);
192 snd_rawmidi_set_ops(rt->instance, SNDRV_RAWMIDI_STREAM_INPUT,
193 &in_ops);
194
195 chip->midi = rt;
196 return 0;
197}
198
199void usb6fire_midi_abort(struct sfire_chip *chip)
200{
201 struct midi_runtime *rt = chip->midi;
202
203 if (rt)
204 usb_poison_urb(&rt->out_urb);
205}
206
207void usb6fire_midi_destroy(struct sfire_chip *chip)
208{
209 struct midi_runtime *rt = chip->midi;
210
211 kfree(rt->out_buffer);
212 kfree(rt);
213 chip->midi = NULL;
214}
215
