2 * Linux driver for TerraTec DMX 6Fire USB
6 * Author: Torsten Schenk <torsten.schenk@zoho.com>
7 * Created: Jan 01, 2011
9 * Copyright: (C) Torsten Schenk
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
17 #include <sound/rawmidi.h>
23 static void usb6fire_midi_out_handler(struct urb *urb)
25 struct midi_runtime *rt = urb->context;
29 spin_lock_irqsave(&rt->out_lock, flags);
32 ret = snd_rawmidi_transmit(rt->out, rt->out_buffer + 4,
34 if (ret > 0) { /* more data available, send next packet */
35 rt->out_buffer[1] = ret + 2;
36 rt->out_buffer[3] = rt->out_serial++;
37 urb->transfer_buffer_length = ret + 4;
39 ret = usb_submit_urb(urb, GFP_ATOMIC);
41 snd_printk(KERN_ERR PREFIX "midi out urb "
42 "submit failed: %d\n", ret);
43 } else /* no more data to transmit */
46 spin_unlock_irqrestore(&rt->out_lock, flags);
49 static void usb6fire_midi_in_received(
50 struct midi_runtime *rt, u8 *data, int length)
54 spin_lock_irqsave(&rt->in_lock, flags);
56 snd_rawmidi_receive(rt->in, data, length);
57 spin_unlock_irqrestore(&rt->in_lock, flags);
60 static int usb6fire_midi_out_open(struct snd_rawmidi_substream *alsa_sub)
65 static int usb6fire_midi_out_close(struct snd_rawmidi_substream *alsa_sub)
70 static void usb6fire_midi_out_trigger(
71 struct snd_rawmidi_substream *alsa_sub, int up)
73 struct midi_runtime *rt = alsa_sub->rmidi->private_data;
74 struct urb *urb = &rt->out_urb;
78 spin_lock_irqsave(&rt->out_lock, flags);
79 if (up) { /* start transfer */
80 if (rt->out) { /* we are already transmitting so just return */
81 spin_unlock_irqrestore(&rt->out_lock, flags);
85 ret = snd_rawmidi_transmit(alsa_sub, rt->out_buffer + 4,
88 rt->out_buffer[1] = ret + 2;
89 rt->out_buffer[3] = rt->out_serial++;
90 urb->transfer_buffer_length = ret + 4;
92 ret = usb_submit_urb(urb, GFP_ATOMIC);
94 snd_printk(KERN_ERR PREFIX "midi out urb "
95 "submit failed: %d\n", ret);
99 } else if (rt->out == alsa_sub)
101 spin_unlock_irqrestore(&rt->out_lock, flags);
104 static void usb6fire_midi_out_drain(struct snd_rawmidi_substream *alsa_sub)
106 struct midi_runtime *rt = alsa_sub->rmidi->private_data;
109 while (rt->out && retry++ < 100)
113 static int usb6fire_midi_in_open(struct snd_rawmidi_substream *alsa_sub)
118 static int usb6fire_midi_in_close(struct snd_rawmidi_substream *alsa_sub)
123 static void usb6fire_midi_in_trigger(
124 struct snd_rawmidi_substream *alsa_sub, int up)
126 struct midi_runtime *rt = alsa_sub->rmidi->private_data;
129 spin_lock_irqsave(&rt->in_lock, flags);
134 spin_unlock_irqrestore(&rt->in_lock, flags);
137 static struct snd_rawmidi_ops out_ops = {
138 .open = usb6fire_midi_out_open,
139 .close = usb6fire_midi_out_close,
140 .trigger = usb6fire_midi_out_trigger,
141 .drain = usb6fire_midi_out_drain
144 static struct snd_rawmidi_ops in_ops = {
145 .open = usb6fire_midi_in_open,
146 .close = usb6fire_midi_in_close,
147 .trigger = usb6fire_midi_in_trigger
150 int __devinit usb6fire_midi_init(struct sfire_chip *chip)
153 struct midi_runtime *rt = kzalloc(sizeof(struct midi_runtime),
155 struct comm_runtime *comm_rt = chip->comm;
161 rt->in_received = usb6fire_midi_in_received;
162 rt->out_buffer[0] = 0x80; /* 'send midi' command */
163 rt->out_buffer[1] = 0x00; /* size of data */
164 rt->out_buffer[2] = 0x00; /* always 0 */
165 spin_lock_init(&rt->in_lock);
166 spin_lock_init(&rt->out_lock);
168 comm_rt->init_urb(comm_rt, &rt->out_urb, rt->out_buffer, rt,
169 usb6fire_midi_out_handler);
171 ret = snd_rawmidi_new(chip->card, "6FireUSB", 0, 1, 1, &rt->instance);
174 snd_printk(KERN_ERR PREFIX "unable to create midi.\n");
177 rt->instance->private_data = rt;
178 strcpy(rt->instance->name, "DMX6FireUSB MIDI");
179 rt->instance->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
180 SNDRV_RAWMIDI_INFO_INPUT |
181 SNDRV_RAWMIDI_INFO_DUPLEX;
182 snd_rawmidi_set_ops(rt->instance, SNDRV_RAWMIDI_STREAM_OUTPUT,
184 snd_rawmidi_set_ops(rt->instance, SNDRV_RAWMIDI_STREAM_INPUT,
191 void usb6fire_midi_abort(struct sfire_chip *chip)
193 struct midi_runtime *rt = chip->midi;
196 usb_poison_urb(&rt->out_urb);
199 void usb6fire_midi_destroy(struct sfire_chip *chip)