mirror of https://gitee.com/openkylin/linux.git
41 lines
1.3 KiB
C
41 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __USBAUDIO_HELPER_H
|
|
#define __USBAUDIO_HELPER_H
|
|
|
|
unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size);
|
|
|
|
void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype);
|
|
void *snd_usb_find_csint_desc(void *descstart, int desclen, void *after, u8 dsubtype);
|
|
|
|
int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe,
|
|
__u8 request, __u8 requesttype, __u16 value, __u16 index,
|
|
void *data, __u16 size);
|
|
|
|
unsigned char snd_usb_parse_datainterval(struct snd_usb_audio *chip,
|
|
struct usb_host_interface *alts);
|
|
|
|
struct usb_host_interface *
|
|
snd_usb_get_host_interface(struct snd_usb_audio *chip, int ifnum, int altsetting);
|
|
|
|
/*
|
|
* retrieve usb_interface descriptor from the host interface
|
|
* (conditional for compatibility with the older API)
|
|
*/
|
|
#define get_iface_desc(iface) (&(iface)->desc)
|
|
#define get_endpoint(alt,ep) (&(alt)->endpoint[ep].desc)
|
|
#define get_ep_desc(ep) (&(ep)->desc)
|
|
#define get_cfg_desc(cfg) (&(cfg)->desc)
|
|
|
|
#define snd_usb_get_speed(dev) ((dev)->speed)
|
|
|
|
static inline int snd_usb_ctrl_intf(struct snd_usb_audio *chip)
|
|
{
|
|
return get_iface_desc(chip->ctrl_intf)->bInterfaceNumber;
|
|
}
|
|
|
|
/* in validate.c */
|
|
bool snd_usb_validate_audio_desc(void *p, int protocol);
|
|
bool snd_usb_validate_midi_desc(void *p);
|
|
|
|
#endif /* __USBAUDIO_HELPER_H */
|