diff options
Diffstat (limited to 'sound/usb/usbmidi.c')
| -rw-r--r-- | sound/usb/usbmidi.c | 46 |
1 files changed, 42 insertions, 4 deletions
diff --git a/sound/usb/usbmidi.c b/sound/usb/usbmidi.c index 99295f9b769..6330788c1c2 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 @@ -963,8 +983,10 @@ static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi* umidi, snd_usbmidi_out_endpoint_delete(ep); return -ENOMEM; } - /* we never use interrupt output pipes */ - pipe = usb_sndbulkpipe(umidi->chip->dev, ep_info->out_ep); + if (ep_info->out_interval) + pipe = usb_sndintpipe(umidi->chip->dev, ep_info->out_ep); + else + pipe = usb_sndbulkpipe(umidi->chip->dev, ep_info->out_ep); if (umidi->chip->usb_id == USB_ID(0x0a92, 0x1020)) /* ESI M4U */ /* FIXME: we need more URBs to get reasonable bandwidth here: */ ep->max_transfer = 4; @@ -976,8 +998,14 @@ static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi* umidi, snd_usbmidi_out_endpoint_delete(ep); return -ENOMEM; } - usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer, - ep->max_transfer, snd_usbmidi_out_urb_complete, ep); + if (ep_info->out_interval) + usb_fill_int_urb(ep->urb, umidi->chip->dev, pipe, buffer, + ep->max_transfer, snd_usbmidi_out_urb_complete, + ep, ep_info->out_interval); + else + usb_fill_bulk_urb(ep->urb, umidi->chip->dev, + pipe, buffer, ep->max_transfer, + snd_usbmidi_out_urb_complete, ep); ep->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; spin_lock_init(&ep->buffer_lock); @@ -1323,6 +1351,13 @@ static int snd_usbmidi_get_ms_info(struct snd_usb_midi* umidi, endpoints[epidx].out_ep = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) endpoints[epidx].out_interval = ep->bInterval; + else if (snd_usb_get_speed(umidi->chip->dev) == USB_SPEED_LOW) + /* + * Low speed bulk transfers don't exist, so + * force interrupt transfers for devices like + * ESI MIDI Mate that try to use them anyway. + */ + endpoints[epidx].out_interval = 1; endpoints[epidx].out_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1; snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n", ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack); @@ -1336,6 +1371,8 @@ static int snd_usbmidi_get_ms_info(struct snd_usb_midi* umidi, endpoints[epidx].in_ep = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) endpoints[epidx].in_interval = ep->bInterval; + else if (snd_usb_get_speed(umidi->chip->dev) == USB_SPEED_LOW) + endpoints[epidx].in_interval = 1; endpoints[epidx].in_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1; snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n", ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack); @@ -1690,6 +1727,7 @@ 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: |