2 * Linux driver for TerraTec DMX 6Fire USB
6 * Author: Torsten Schenk <torsten.schenk@zoho.com>
7 * Created: Jan 01, 2011
8 * Copyright: (C) Torsten Schenk
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
16 #include <sound/rawmidi.h>
22 static void usb6fire_midi_out_handler(struct urb *urb)
24 struct midi_runtime *rt = urb->context;
28 spin_lock_irqsave(&rt->out_lock, flags);
31 ret = snd_rawmidi_transmit(rt->out, rt->out_buffer + 4,
33 if (ret > 0) { /* more data available, send next packet */
34 rt->out_buffer[1] = ret + 2;
35 rt->out_buffer[3] = rt->out_serial++;
36 urb->transfer_buffer_length = ret + 4;
38 ret = usb_submit_urb(urb, GFP_ATOMIC);
40 snd_printk(KERN_ERR PREFIX "midi out urb "
41 "submit failed: %d\n", ret);
42 } else /* no more data to transmit */
45 spin_unlock_irqrestore(&rt->out_lock, flags);
48 static void usb6fire_midi_in_received(
49 struct midi_runtime *rt, u8 *data, int length)
53 spin_lock_irqsave(&rt->in_lock, flags);
55 snd_rawmidi_receive(rt->in, data, length);
56 spin_unlock_irqrestore(&rt->in_lock, flags);
59 static int usb6fire_midi_out_open(struct snd_rawmidi_substream *alsa_sub)
64 static int usb6fire_midi_out_close(struct snd_rawmidi_substream *alsa_sub)
69 static void usb6fire_midi_out_trigger(
70 struct snd_rawmidi_substream *alsa_sub, int up)
72 struct midi_runtime *rt = alsa_sub->rmidi->private_data;
73 struct urb *urb = &rt->out_urb;
77 spin_lock_irqsave(&rt->out_lock, flags);
78 if (up) { /* start transfer */
79 if (rt->out) { /* we are already transmitting so just return */
80 spin_unlock_irqrestore(&rt->out_lock, flags);
84 ret = snd_rawmidi_transmit(alsa_sub, rt->out_buffer + 4,
87 rt->out_buffer[1] = ret + 2;
88 rt->out_buffer[3] = rt->out_serial++;
89 urb->transfer_buffer_length = ret + 4;
91 ret = usb_submit_urb(urb, GFP_ATOMIC);
93 snd_printk(KERN_ERR PREFIX "midi out urb "
94 "submit failed: %d\n", ret);
98 } else if (rt->out == alsa_sub)
100 spin_unlock_irqrestore(&rt->out_lock, flags);
103 static void usb6fire_midi_out_drain(struct snd_rawmidi_substream *alsa_sub)
105 struct midi_runtime *rt = alsa_sub->rmidi->private_data;
108 while (rt->out && retry++ < 100)
112 static int usb6fire_midi_in_open(struct snd_rawmidi_substream *alsa_sub)
117 static int usb6fire_midi_in_close(struct snd_rawmidi_substream *alsa_sub)
122 static void usb6fire_midi_in_trigger(
123 struct snd_rawmidi_substream *alsa_sub, int up)
125 struct midi_runtime *rt = alsa_sub->rmidi->private_data;
128 spin_lock_irqsave(&rt->in_lock, flags);
133 spin_unlock_irqrestore(&rt->in_lock, flags);
136 static struct snd_rawmidi_ops out_ops = {
137 .open = usb6fire_midi_out_open,
138 .close = usb6fire_midi_out_close,
139 .trigger = usb6fire_midi_out_trigger,
140 .drain = usb6fire_midi_out_drain
143 static struct snd_rawmidi_ops in_ops = {
144 .open = usb6fire_midi_in_open,
145 .close = usb6fire_midi_in_close,
146 .trigger = usb6fire_midi_in_trigger
149 int usb6fire_midi_init(struct sfire_chip *chip)
152 struct midi_runtime *rt = kzalloc(sizeof(struct midi_runtime),
154 struct comm_runtime *comm_rt = chip->comm;
160 rt->in_received = usb6fire_midi_in_received;
161 rt->out_buffer[0] = 0x80; /* 'send midi' command */
162 rt->out_buffer[1] = 0x00; /* size of data */
163 rt->out_buffer[2] = 0x00; /* always 0 */
164 spin_lock_init(&rt->in_lock);
165 spin_lock_init(&rt->out_lock);
167 comm_rt->init_urb(comm_rt, &rt->out_urb, rt->out_buffer, rt,
168 usb6fire_midi_out_handler);
170 ret = snd_rawmidi_new(chip->card, "6FireUSB", 0, 1, 1, &rt->instance);
173 snd_printk(KERN_ERR PREFIX "unable to create midi.\n");
176 rt->instance->private_data = rt;
177 strcpy(rt->instance->name, "DMX6FireUSB MIDI");
178 rt->instance->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
179 SNDRV_RAWMIDI_INFO_INPUT |
180 SNDRV_RAWMIDI_INFO_DUPLEX;
181 snd_rawmidi_set_ops(rt->instance, SNDRV_RAWMIDI_STREAM_OUTPUT,
183 snd_rawmidi_set_ops(rt->instance, SNDRV_RAWMIDI_STREAM_INPUT,
190 void usb6fire_midi_abort(struct sfire_chip *chip)
192 struct midi_runtime *rt = chip->midi;
195 usb_poison_urb(&rt->out_urb);
198 void usb6fire_midi_destroy(struct sfire_chip *chip)