ALSA: usb-audio: add new quirk type QUIRK_AUDIO_STANDARD_MIXER
[linux-2.6.git] / sound / usb / helper.h
1 #ifndef __USBAUDIO_HELPER_H
2 #define __USBAUDIO_HELPER_H
3
4 unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size);
5
6 void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype);
7 void *snd_usb_find_csint_desc(void *descstart, int desclen, void *after, u8 dsubtype);
8
9 int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe,
10                     __u8 request, __u8 requesttype, __u16 value, __u16 index,
11                     void *data, __u16 size, int timeout);
12
13 unsigned char snd_usb_parse_datainterval(struct snd_usb_audio *chip,
14                                          struct usb_host_interface *alts);
15
16 /*
17  * retrieve usb_interface descriptor from the host interface
18  * (conditional for compatibility with the older API)
19  */
20 #ifndef get_iface_desc
21 #define get_iface_desc(iface)   (&(iface)->desc)
22 #define get_endpoint(alt,ep)    (&(alt)->endpoint[ep].desc)
23 #define get_ep_desc(ep)         (&(ep)->desc)
24 #define get_cfg_desc(cfg)       (&(cfg)->desc)
25 #endif
26
27 #ifndef snd_usb_get_speed
28 #define snd_usb_get_speed(dev) ((dev)->speed)
29 #endif
30
31 static inline int snd_usb_ctrl_intf(struct snd_usb_audio *chip)
32 {
33         return get_iface_desc(chip->ctrl_intf)->bInterfaceNumber;
34 }
35
36 #endif /* __USBAUDIO_HELPER_H */