| /* 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); |
| |
| /* |
| * 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 */ |