diff options
| -rw-r--r-- | sound/usb/usbmidi.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/sound/usb/usbmidi.c b/sound/usb/usbmidi.c index 99295f9b7691..2bb1834a8c22 100644 --- a/sound/usb/usbmidi.c +++ b/sound/usb/usbmidi.c @@ -407,6 +407,20 @@ static void snd_usbmidi_maudio_broken_running_status_input( } /* + * CME protocol: like the standard protocol, but SysEx commands are sent as a + * single USB packet preceded by a 0x0F byte. + */ +static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep, + uint8_t *buffer, int buffer_length) +{ + if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f) + snd_usbmidi_standard_input(ep, buffer, buffer_length); + else + snd_usbmidi_input_data(ep, buffer[0] >> 4, + &buffer[1], buffer_length - 1); +} + +/* * Adds one USB MIDI packet to the output buffer. */ static void snd_usbmidi_output_standard_packet(struct urb* urb, uint8_t p0, @@ -572,6 +586,12 @@ static struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = { .output_packet = snd_usbmidi_output_standard_packet, }; +static struct usb_protocol_ops snd_usbmidi_cme_ops = { + .input = snd_usbmidi_cme_input, + .output = snd_usbmidi_standard_output, + .output_packet = snd_usbmidi_output_standard_packet, +}; + /* * Novation USB MIDI protocol: number of data bytes is in the first byte * (when receiving) (+1!) or in the second byte (when sending); data begins @@ -1690,6 +1710,7 @@ int snd_usb_create_midi_interface(struct snd_usb_audio* chip, err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1); break; case QUIRK_MIDI_CME: + umidi->usb_protocol_ops = &snd_usbmidi_cme_ops; err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints); break; default: |
