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authorClemens Ladisch <clemens@ladisch.de>2005-05-02 08:51:26 +0200
committerJaroslav Kysela <perex@suse.cz>2005-05-29 10:05:47 +0200
commit27d10f5664c7650af3b2ffadfefaf19b36dc7bd8 (patch)
treeb89c8d639041f460557bf6e9078c7cee7426cd2b /sound/usb/usbaudio.h
parentb259b10c420a59a2fdbcf5a3498253ebcbdffa1e (diff)
downloadlinux-linaro-27d10f5664c7650af3b2ffadfefaf19b36dc7bd8.tar.gz
[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 <clemens@ladisch.de>
Diffstat (limited to 'sound/usb/usbaudio.h')
-rw-r--r--sound/usb/usbaudio.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index 41d842dab3e..aedb42aaa74 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;