From 27d10f5664c7650af3b2ffadfefaf19b36dc7bd8 Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Mon, 2 May 2005 08:51:26 +0200 Subject: [ALSA] usb-audio - cache vendor/product IDs USB generic driver Cache the decoded values of idVendor/idProduct to get rid of most of those ugly le16_to_cpu() calls. Signed-off-by: Clemens Ladisch --- sound/usb/usbaudio.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'sound/usb/usbaudio.h') diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h index 41d842dab3e8..aedb42aaa749 100644 --- a/sound/usb/usbaudio.h +++ b/sound/usb/usbaudio.h @@ -118,6 +118,11 @@ /* maximum number of endpoints per interface */ #define MIDI_MAX_ENDPOINTS 2 +/* handling of USB vendor/product ID pairs as 32-bit numbers */ +#define USB_ID(vendor, product) (((vendor) << 16) | (product)) +#define USB_ID_VENDOR(id) ((id) >> 16) +#define USB_ID_PRODUCT(id) ((u16)(id)) + /* */ @@ -127,6 +132,7 @@ struct snd_usb_audio { int index; struct usb_device *dev; snd_card_t *card; + u32 usb_id; int shutdown; int num_interfaces; -- cgit v1.2.3