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