diff options
| author | Clemens Ladisch <clemens@ladisch.de> | 2005-05-02 08:51:26 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2005-05-29 10:05:47 +0200 |
| commit | 27d10f5664c7650af3b2ffadfefaf19b36dc7bd8 (patch) | |
| tree | b89c8d639041f460557bf6e9078c7cee7426cd2b /sound/usb/usbaudio.h | |
| parent | b259b10c420a59a2fdbcf5a3498253ebcbdffa1e (diff) | |
[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.h | 6 |
1 files changed, 6 insertions, 0 deletions
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; |