1 #ifndef __USBAUDIO_HELPER_H 2 #define __USBAUDIO_HELPER_H 3 4 unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size); 5 6 void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype); 7 void *snd_usb_find_csint_desc(void *descstart, int desclen, void *after, u8 dsubtype); 8 9 int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, 10 __u8 request, __u8 requesttype, __u16 value, __u16 index, 11 void *data, __u16 size); 12 13 unsigned char snd_usb_parse_datainterval(struct snd_usb_audio *chip, 14 struct usb_host_interface *alts); 15 16 /* 17 * retrieve usb_interface descriptor from the host interface 18 * (conditional for compatibility with the older API) 19 */ 20 #ifndef get_iface_desc 21 #define get_iface_desc(iface) (&(iface)->desc) 22 #define get_endpoint(alt,ep) (&(alt)->endpoint[ep].desc) 23 #define get_ep_desc(ep) (&(ep)->desc) 24 #define get_cfg_desc(cfg) (&(cfg)->desc) 25 #endif 26 27 #ifndef snd_usb_get_speed 28 #define snd_usb_get_speed(dev) ((dev)->speed) 29 #endif 30 31 static inline int snd_usb_ctrl_intf(struct snd_usb_audio *chip) 32 { 33 return get_iface_desc(chip->ctrl_intf)->bInterfaceNumber; 34 } 35 36 #endif /* __USBAUDIO_HELPER_H */ 37