Hello Luis, and Alsa list,
I recently got an Edirol UA-4FX. It works just fine as a generic USB
Audio device. I've written up all the details at
http://alsa.opensrc.org/index.php/Edirol_UA-4FX (shamelessly stolen
from the Edirol_UA-25 page).
The the UA-4FX needs a patch to usbaudio.c create_ua700_ua25_quirk()
and usbquirks.h, and then it has full support. (MIDI I/O, sample rates
up to 96 kHz) I've made an attempt, mostly to get it working on my
machine. Can you review it?
Thanks,
David
Add Alsa support for Roland Edirol UA-4FX in Advanced mode
(for MIDI support and sample rates of 48 kHz and 96 kHz)
usbaudio.c, usbquirks.h
Signed-off-by: david.c.hubbard@xxxxxxxxx
===================================================================
diff -u sound/usb/usbaudio.c.00 sound/usb/usbaudio.c
--- sound/usb/usbaudio.c.00 2007-11-28 02:13:10.000000000 -0700
+++ sound/usb/usbaudio.c 2007-11-28 02:44:47.000000000 -0700
@@ -2930,7 +2930,7 @@
}
/*
- * Create a stream for an Edirol UA-700/UA-25 interface. The only way
+ * Create a stream for an Edirol UA-700/UA-25/UA-4FX interface. The only way
* to detect the sample rate is by looking at wMaxPacketSize.
*/
static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
@@ -2950,8 +2950,11 @@
struct audioformat *fp;
int stream, err;
- /* both PCM and MIDI interfaces have 2 altsettings */
- if (iface->num_altsetting != 2)
+ /* both PCM and MIDI interfaces have 2 altsettings,
+ * except UA-4FX at 48 kHz, PCM interface has 3 altsettings */
+ if (iface->num_altsetting != 2 &&
+ (chip->usb_id != USB_ID(0x0582, 0x00a3) ||
+ iface->num_altsetting != 3))
return -ENXIO;
alts = &iface->altsetting[1];
altsd = get_iface_desc(alts);
diff -u sound/usb/usbquirks.h.00 sound/usb/usbquirks.h
--- sound/usb/usbquirks.h.00 2007-11-28 02:15:11.000000000 -0700
+++ sound/usb/usbquirks.h 2007-11-28 02:17:51.000000000 -0700
@@ -1311,6 +1311,37 @@
}
},
/* TODO: add Edirol MD-P1 support */
+{ /*
+ * This quirk is for the "Advanced" modes of the Edirol UA-4FX.
+ * If the switch is not in an advanced setting, the UA-4FX has
+ * ID 0x0582/0x00a4 and is standard compliant (no quirks), but
+ * offers only 16-bit PCM at 44.1 kHz and no MIDI.
+ */
+ USB_DEVICE_VENDOR_SPEC(0x0582, 0x00a3),
+ .driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
+ .vendor_name = "EDIROL",
+ .product_name = "UA-4FX",
+ .ifnum = QUIRK_ANY_INTERFACE,
+ .type = QUIRK_COMPOSITE,
+ .data = (const struct snd_usb_audio_quirk[]) {
+ {
+ .ifnum = 0,
+ .type = QUIRK_AUDIO_EDIROL_UA700_UA25
+ },
+ {
+ .ifnum = 1,
+ .type = QUIRK_AUDIO_EDIROL_UA700_UA25
+ },
+ {
+ .ifnum = 2,
+ .type = QUIRK_AUDIO_EDIROL_UA700_UA25
+ },
+ {
+ .ifnum = -1
+ }
+ }
+ }
+},
{
/* Roland SH-201 */
USB_DEVICE(0x0582, 0x00ad),
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