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Commit 3a2f0856 authored by Clemens Ladisch's avatar Clemens Ladisch Committed by Jaroslav Kysela
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[ALSA] usb-audio - enable high speed (not) on Audigy 2 NX 



USB generic driver
The SB Audigy 2 NX needs a special boot-up command before it works in
high speed mode.

However, we don't actually enable it yet because high speed
synchronization doesn't seem to work with this device.

Signed-off-by: default avatarClemens Ladisch <clemens@ladisch.de>
parent 3714b534

sound/usb/usbaudio.c

+24 −0
Original line number Diff line number Diff line
@@ -2925,6 +2925,25 @@ static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interfac 
	return 0;

}



static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)

{

#if 0

	/* TODO: enable this when high speed synchronization actually works */

	u8 buf = 1;



	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,

			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,

			0, 0, &buf, 1, 1000);

	if (buf == 0) {

		snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,

				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,

				1, 2000, NULL, 0, 1000);

		return -ENODEV;

	}

#endif

	return 0;

}





/*

 * audio-interface quirks
@@ -3154,6 +3173,11 @@ static void *snd_usb_audio_probe(struct usb_device *dev, 
			goto __err_val;

		config = dev->actconfig;

	}

	/* SB Audigy 2 NX needs its own boot-up magic, too */

	if (id == USB_ID(0x041e, 0x3020)) {

		if (snd_usb_audigy2nx_boot_quirk(dev) < 0)

			goto __err_val;

	}



	/*

	 * found a config.  now register to ALSA