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ALSA: usb-mixer: Add support for Audio Class v2.0

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USB Audio Class v2.0 compliant devices have different descriptors and a
different way of setting/getting min/max/res/cur properties. This patch
adds support for them.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Cc: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Daniel Mack
2010-03-11 21:13:25 +01:00
committed by Takashi Iwai
parent 99fc86450c
commit 23caaf19b1
4 changed files with 343 additions and 100 deletions
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47
include/linux/usb/audio-v2.h
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@@ -43,6 +43,53 @@ struct uac_clock_selector_descriptor {
__u8 baCSourceID[];
} __attribute__((packed));
/* 4.7.2.4 Input terminal descriptor */
struct uac2_input_terminal_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bTerminalID;
__u16 wTerminalType;
__u8 bAssocTerminal;
__u8 bCSourceID;
__u8 bNrChannels;
__u32 bmChannelConfig;
__u8 iChannelNames;
__u16 bmControls;
__u8 iTerminal;
} __attribute__((packed));
/* 4.7.2.5 Output terminal descriptor */
struct uac2_output_terminal_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bTerminalID;
__u16 wTerminalType;
__u8 bAssocTerminal;
__u8 bSourceID;
__u8 bCSourceID;
__u16 bmControls;
__u8 iTerminal;
} __attribute__((packed));
/* 4.7.2.8 Feature Unit Descriptor */
struct uac2_feature_unit_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bUnitID;
__u8 bSourceID;
/* bmaControls is actually u32,
* but u8 is needed for the hybrid parser */
__u8 bmaControls[0]; /* variable length */
} __attribute__((packed));
/* 4.9.2 Class-Specific AS Interface Descriptor */
struct uac_as_header_descriptor_v2 {