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authorKarsten Wiese <fzu@wemgehoertderstaat.de>2008-07-30 15:13:29 +0200
committerJaroslav Kysela <perex@perex.cz>2008-08-01 13:37:12 +0200
commit030a07e441296c372f946cd4065b5d831d8dc40c (patch)
tree4032eba646f9bf1c6f146adc40b449cf50b59a47 /sound/usb/usbmidi.c
parent896e6cc20e67038af12e1a7711eef32647e62f23 (diff)
downloadlinux-linaro-030a07e441296c372f946cd4065b5d831d8dc40c.tar.gz
ALSA: Add USB US122L driver
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>
Diffstat (limited to 'sound/usb/usbmidi.c')
-rw-r--r--sound/usb/usbmidi.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/sound/usb/usbmidi.c b/sound/usb/usbmidi.c
index 6676a177c99..c0c7770198a 100644
--- a/sound/usb/usbmidi.c
+++ b/sound/usb/usbmidi.c
@@ -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));