1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef __USBAUDIO_HELPER_H
3*4882a593Smuzhiyun #define __USBAUDIO_HELPER_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size);
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype);
8*4882a593Smuzhiyun void *snd_usb_find_csint_desc(void *descstart, int desclen, void *after, u8 dsubtype);
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe,
11*4882a593Smuzhiyun __u8 request, __u8 requesttype, __u16 value, __u16 index,
12*4882a593Smuzhiyun void *data, __u16 size);
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun unsigned char snd_usb_parse_datainterval(struct snd_usb_audio *chip,
15*4882a593Smuzhiyun struct usb_host_interface *alts);
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun /*
18*4882a593Smuzhiyun * retrieve usb_interface descriptor from the host interface
19*4882a593Smuzhiyun * (conditional for compatibility with the older API)
20*4882a593Smuzhiyun */
21*4882a593Smuzhiyun #define get_iface_desc(iface) (&(iface)->desc)
22*4882a593Smuzhiyun #define get_endpoint(alt,ep) (&(alt)->endpoint[ep].desc)
23*4882a593Smuzhiyun #define get_ep_desc(ep) (&(ep)->desc)
24*4882a593Smuzhiyun #define get_cfg_desc(cfg) (&(cfg)->desc)
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun #define snd_usb_get_speed(dev) ((dev)->speed)
27*4882a593Smuzhiyun
snd_usb_ctrl_intf(struct snd_usb_audio * chip)28*4882a593Smuzhiyun static inline int snd_usb_ctrl_intf(struct snd_usb_audio *chip)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun return get_iface_desc(chip->ctrl_intf)->bInterfaceNumber;
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun /* in validate.c */
34*4882a593Smuzhiyun bool snd_usb_validate_audio_desc(void *p, int protocol);
35*4882a593Smuzhiyun bool snd_usb_validate_midi_desc(void *p);
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun #endif /* __USBAUDIO_HELPER_H */
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