| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef __USBAUDIO_HELPER_H |
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| 3 | #define __USBAUDIO_HELPER_H |
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| 4 | |
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| 5 | unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size); |
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| 6 | |
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| 7 | void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype); |
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| 8 | void *snd_usb_find_csint_desc(void *descstart, int desclen, void *after, u8 dsubtype); |
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| 9 | |
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| 10 | int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, |
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| 11 | __u8 request, __u8 requesttype, __u16 value, __u16 index, |
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| 12 | void *data, __u16 size); |
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| 13 | |
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| 14 | unsigned char snd_usb_parse_datainterval(struct snd_usb_audio *chip, |
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| 15 | struct usb_host_interface *alts); |
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| 16 | |
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| 17 | struct usb_host_interface * |
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| 18 | snd_usb_get_host_interface(struct snd_usb_audio *chip, int ifnum, int altsetting); |
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| 19 | |
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| 20 | /* |
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| 21 | * retrieve usb_interface descriptor from the host interface |
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| 22 | * (conditional for compatibility with the older API) |
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| 23 | */ |
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| 24 | #define get_iface_desc(iface) (&(iface)->desc) |
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| 25 | #define get_endpoint(alt,ep) (&(alt)->endpoint[ep].desc) |
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| 26 | #define get_ep_desc(ep) (&(ep)->desc) |
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| 27 | #define get_cfg_desc(cfg) (&(cfg)->desc) |
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| 28 | |
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| 29 | #define snd_usb_get_speed(dev) ((dev)->speed) |
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| 30 | |
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| 31 | static inline int snd_usb_ctrl_intf(struct snd_usb_audio *chip) |
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| 32 | { |
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| 33 | return get_iface_desc(chip->ctrl_intf)->bInterfaceNumber; |
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| 34 | } |
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| 35 | |
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| 36 | /* in validate.c */ |
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| 37 | bool snd_usb_validate_audio_desc(void *p, int protocol); |
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| 38 | bool snd_usb_validate_midi_desc(void *p); |
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| 39 | |
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| 40 | #endif /* __USBAUDIO_HELPER_H */ |
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| 41 | |
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