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authorKristian Amlie <kristian@amlie.name>2011-08-26 13:19:49 +0200
committerTakashi Iwai <tiwai@suse.de>2011-08-26 14:12:34 +0200
commit1ef0e0a05345b7411bdabbfca27f58bd33dcc7c8 (patch)
tree84e8816d89a6918411226c3f58501db59cd0b924
parent391e69143d0a05f960e3ab39a8c26b7b230bb8a9 (diff)
downloadblackbird-op-linux-1ef0e0a05345b7411bdabbfca27f58bd33dcc7c8.tar.gz
blackbird-op-linux-1ef0e0a05345b7411bdabbfca27f58bd33dcc7c8.zip
ALSA: usb-audio: add Starr Labs USB MIDI support
Add support for Starr Labs USB MIDI devices such as the Z7S, which are based on an FTDI serial UART chip. Based on a patch by Daniel Mack. Signed-off-by: Kristian Amlie <kristian@amlie.name> Acked-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--sound/usb/midi.c27
-rw-r--r--sound/usb/quirks-table.h11
-rw-r--r--sound/usb/quirks.c1
-rw-r--r--sound/usb/usbaudio.h1
4 files changed, 40 insertions, 0 deletions
diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index f9289102886a..e21f026d9577 100644
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -816,6 +816,22 @@ static struct usb_protocol_ops snd_usbmidi_raw_ops = {
.output = snd_usbmidi_raw_output,
};
+/*
+ * FTDI protocol: raw MIDI bytes, but input packets have two modem status bytes.
+ */
+
+static void snd_usbmidi_ftdi_input(struct snd_usb_midi_in_endpoint* ep,
+ uint8_t* buffer, int buffer_length)
+{
+ if (buffer_length > 2)
+ snd_usbmidi_input_data(ep, 0, buffer + 2, buffer_length - 2);
+}
+
+static struct usb_protocol_ops snd_usbmidi_ftdi_ops = {
+ .input = snd_usbmidi_ftdi_input,
+ .output = snd_usbmidi_raw_output,
+};
+
static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep,
uint8_t *buffer, int buffer_length)
{
@@ -2163,6 +2179,17 @@ int snd_usbmidi_create(struct snd_card *card,
/* endpoint 1 is input-only */
endpoints[1].out_cables = 0;
break;
+ case QUIRK_MIDI_FTDI:
+ umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops;
+
+ /* set baud rate to 31250 (48 MHz / 16 / 96) */
+ err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0),
+ 3, 0x40, 0x60, 0, NULL, 0, 1000);
+ if (err < 0)
+ break;
+
+ err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
+ break;
default:
snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
err = -ENXIO;
diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index a42e3ef3832d..da898229bb11 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -39,6 +39,17 @@
.idProduct = prod, \
.bInterfaceClass = USB_CLASS_VENDOR_SPEC
+/* FTDI devices */
+{
+ USB_DEVICE(0x0403, 0xb8d8),
+ .driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
+ /* .vendor_name = "STARR LABS", */
+ /* .product_name = "Starr Labs MIDI USB device", */
+ .ifnum = 0,
+ .type = QUIRK_MIDI_FTDI
+ }
+},
+
/* Creative/Toshiba Multimedia Center SB-0500 */
{
USB_DEVICE(0x041e, 0x3048),
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 81e07d842581..cf61b0340026 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -306,6 +306,7 @@ int snd_usb_create_quirk(struct snd_usb_audio *chip,
[QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
[QUIRK_MIDI_CME] = create_any_midi_quirk,
[QUIRK_MIDI_AKAI] = create_any_midi_quirk,
+ [QUIRK_MIDI_FTDI] = create_any_midi_quirk,
[QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
[QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
[QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index 1e79986b5777..3e2b03577936 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -80,6 +80,7 @@ enum quirk_type {
QUIRK_MIDI_CME,
QUIRK_MIDI_AKAI,
QUIRK_MIDI_US122L,
+ QUIRK_MIDI_FTDI,
QUIRK_AUDIO_STANDARD_INTERFACE,
QUIRK_AUDIO_FIXED_ENDPOINT,
QUIRK_AUDIO_EDIROL_UAXX,
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