47 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef __USBAUDIO_HELPER_H3#define __USBAUDIO_HELPER_H4 5unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size);6 7void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype);8void *snd_usb_find_csint_desc(void *descstart, int desclen, void *after, u8 dsubtype);9 10int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe,11 __u8 request, __u8 requesttype, __u16 value, __u16 index,12 void *data, __u16 size);13 14unsigned char snd_usb_parse_datainterval(struct snd_usb_audio *chip,15 struct usb_host_interface *alts);16 17struct usb_host_interface *18snd_usb_get_host_interface(struct snd_usb_audio *chip, int ifnum, int altsetting);19 20int snd_usb_add_ctrl_interface_link(struct snd_usb_audio *chip, int ifnum,21 int ctrlif);22 23struct usb_host_interface *snd_usb_find_ctrl_interface(struct snd_usb_audio *chip,24 int ifnum);25 26/*27 * retrieve usb_interface descriptor from the host interface28 * (conditional for compatibility with the older API)29 */30#define get_iface_desc(iface) (&(iface)->desc)31#define get_endpoint(alt,ep) (&(alt)->endpoint[ep].desc)32#define get_ep_desc(ep) (&(ep)->desc)33#define get_cfg_desc(cfg) (&(cfg)->desc)34 35#define snd_usb_get_speed(dev) ((dev)->speed)36 37static inline int snd_usb_ctrl_intf(struct usb_host_interface *ctrl_intf)38{39 return get_iface_desc(ctrl_intf)->bInterfaceNumber;40}41 42/* in validate.c */43bool snd_usb_validate_audio_desc(void *p, int protocol);44bool snd_usb_validate_midi_desc(void *p);45 46#endif /* __USBAUDIO_HELPER_H */47