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ALSA: Add USB US122L driver

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Added a new US122L usb-audio driver.  This driver works together with a
dedicated alsa-lib plugin.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Karsten Wiese
2008-07-30 15:13:29 +02:00
committed by Jaroslav Kysela
parent 896e6cc20e
commit 030a07e441
10 changed files with 1648 additions and 1 deletions
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39
sound/usb/usbmidi.c
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@@ -669,6 +669,42 @@ static struct usb_protocol_ops snd_usbmidi_raw_ops = {
.output = snd_usbmidi_raw_output,
};
static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep,
uint8_t *buffer, int buffer_length)
{
if (buffer_length != 9)
return;
buffer_length = 8;
while (buffer_length && buffer[buffer_length - 1] == 0xFD)
buffer_length--;
if (buffer_length)
snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
}
static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep)
{
int count;
if (!ep->ports[0].active)
return;
count = ep->urb->dev->speed == USB_SPEED_HIGH ? 1 : 2;
count = snd_rawmidi_transmit(ep->ports[0].substream,
ep->urb->transfer_buffer,
count);
if (count < 1) {
ep->ports[0].active = 0;
return;
}
memset(ep->urb->transfer_buffer + count, 0xFD, 9 - count);
ep->urb->transfer_buffer_length = count;
}
static struct usb_protocol_ops snd_usbmidi_122l_ops = {
.input = snd_usbmidi_us122l_input,
.output = snd_usbmidi_us122l_output,
};
/*
* Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.
*/
@@ -1714,6 +1750,9 @@ int snd_usb_create_midi_interface(struct snd_usb_audio* chip,
umidi->usb_protocol_ops =
&snd_usbmidi_maudio_broken_running_status_ops;
break;
case QUIRK_MIDI_US122L:
umidi->usb_protocol_ops = &snd_usbmidi_122l_ops;
/* fall through */
case QUIRK_MIDI_FIXED_ENDPOINT:
memcpy(&endpoints[0], quirk->data,
sizeof(struct snd_usb_midi_endpoint_info));