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ALSA: usbaudio: introduce new types for audio class v2 

This patch adds some definitions for audio class v2.

Unfortunately, the UNIT types PROCESSING_UNIT and EXTENSION_UNIT have
different numerical representations in both standards, so there is need
for a _V1 add-on now. usbmixer.c is changed accordingly.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Daniel Mack 2010-02-22 23:49:10 +01:00 committed by Takashi Iwai
parent 28e1b77308
commit 8fee4aff8c
3 changed files with 80 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

57
include/linux/usb/audio.h
View File

@ -25,6 +25,9 @@
#define USB_SUBCLASS_AUDIOSTREAMING 0x02
#define USB_SUBCLASS_MIDISTREAMING 0x03
#define UAC_VERSION_1 0x00
#define UAC_VERSION_2 0x20
/* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */
#define UAC_HEADER 0x01
#define UAC_INPUT_TERMINAL 0x02
@ -180,6 +183,19 @@ struct uac_as_header_descriptor_v1 {
__le16 wFormatTag; /* The Audio Data Format */
} __attribute__ ((packed));
struct uac_as_header_descriptor_v2 {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bTerminalLink;
__u8 bmControls;
__u8 bFormatType;
__u32 bmFormats;
__u8 bNrChannels;
__u32 bmChannelConfig;
__u8 iChannelNames;
} __attribute__((packed));
#define UAC_DT_AS_HEADER_SIZE 7
/* Formats - A.1.1 Audio Data Format Type I Codes */
@ -232,6 +248,19 @@ struct uac_format_type_i_discrete_descriptor_##n { \
#define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3))
struct uac_format_type_i_ext_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bSubslotSize;
__u8 bFormatType;
__u8 bBitResolution;
__u8 bHeaderLength;
__u8 bControlSize;
__u8 bSideBandProtocol;
} __attribute__((packed));
/* Formats - Audio Data Format Type I Codes */
struct uac_format_type_ii_discrete_descriptor {
@ -245,11 +274,26 @@ struct uac_format_type_ii_discrete_descriptor {
__u8 tSamFreq[][3];
} __attribute__((packed));
struct uac_format_type_ii_ext_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bFormatType;
__u16 wMaxBitRate;
__u16 wSamplesPerFrame;
__u8 bHeaderLength;
__u8 bSideBandProtocol;
} __attribute__((packed));
/* Formats - A.2 Format Type Codes */
#define UAC_FORMAT_TYPE_UNDEFINED 0x0
#define UAC_FORMAT_TYPE_I 0x1
#define UAC_FORMAT_TYPE_II 0x2
#define UAC_FORMAT_TYPE_III 0x3
#define UAC_EXT_FORMAT_TYPE_I 0x81
#define UAC_EXT_FORMAT_TYPE_II 0x82
#define UAC_EXT_FORMAT_TYPE_III 0x83
struct uac_iso_endpoint_descriptor {
__u8 bLength; /* in bytes: 7 */
@ -265,6 +309,19 @@ struct uac_iso_endpoint_descriptor {
#define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02
#define UAC_EP_CS_ATTR_FILL_MAX 0x80
/* Audio class v2.0: CLOCK_SOURCE descriptor */
struct uac_clock_source_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bClockID;
__u8 bmAttributes;
__u8 bmControls;
__u8 bAssocTerminal;
__u8 iClockSource;
} __attribute__((packed));
/* A.10.2 Feature Unit Control Selectors */
struct uac_feature_unit_descriptor {

19
sound/usb/usbaudio.h
View File

@ -36,8 +36,17 @@
#define MIXER_UNIT 0x04
#define SELECTOR_UNIT 0x05
#define FEATURE_UNIT 0x06
#define PROCESSING_UNIT 0x07
#define EXTENSION_UNIT 0x08
#define PROCESSING_UNIT_V1 0x07
#define EXTENSION_UNIT_V1 0x08
/* audio class v2 */
#define EFFECT_UNIT 0x07
#define PROCESSING_UNIT_V2 0x08
#define EXTENSION_UNIT_V2 0x09
#define CLOCK_SOURCE 0x0a
#define CLOCK_SELECTOR 0x0b
#define CLOCK_MULTIPLIER 0x0c
#define SAMPLE_RATE_CONVERTER 0x0d
#define AS_GENERAL 0x01
#define FORMAT_TYPE 0x02
@ -60,7 +69,7 @@
#define EP_CS_ATTR_PITCH_CONTROL 0x02
#define EP_CS_ATTR_FILL_MAX 0x80
/* Audio Class specific Request Codes */
/* Audio Class specific Request Codes (v1) */
#define SET_CUR 0x01
#define GET_CUR 0x81
@ -74,6 +83,10 @@
#define GET_MEM 0x85
#define GET_STAT 0xff
/* Audio Class specific Request Codes (v2) */
#define CS_CUR 0x01
#define CS_RANGE 0x02
/* Terminal Control Selectors */
#define COPY_PROTECT_CONTROL 0x01

14
sound/usb/usbmixer.c
View File

@ -286,7 +286,7 @@ static void *find_audio_control_unit(struct mixer_build *state, unsigned char un
p = NULL;
while ((p = snd_usb_find_desc(state->buffer, state->buflen, p,
USB_DT_CS_INTERFACE)) != NULL) {
if (p[0] >= 4 && p[2] >= INPUT_TERMINAL && p[2] <= EXTENSION_UNIT && p[3] == unit)
if (p[0] >= 4 && p[2] >= INPUT_TERMINAL && p[2] <= EXTENSION_UNIT_V1 && p[3] == unit)
return p;
}
return NULL;
@ -607,9 +607,9 @@ static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm
switch (iterm->type >> 16) {
case SELECTOR_UNIT:
strcpy(name, "Selector"); return 8;
case PROCESSING_UNIT:
case PROCESSING_UNIT_V1:
strcpy(name, "Process Unit"); return 12;
case EXTENSION_UNIT:
case EXTENSION_UNIT_V1:
strcpy(name, "Ext Unit"); return 8;
case MIXER_UNIT:
strcpy(name, "Mixer"); return 5;
@ -673,8 +673,8 @@ static int check_input_term(struct mixer_build *state, int id, struct usb_audio_
term->id = id;
term->name = p1[9 + p1[0] - 1];
return 0;
case PROCESSING_UNIT:
case EXTENSION_UNIT:
case PROCESSING_UNIT_V1:
case EXTENSION_UNIT_V1:
if (p1[6] == 1) {
id = p1[7];
break; /* continue to parse */
@ -1747,9 +1747,9 @@ static int parse_audio_unit(struct mixer_build *state, int unitid)
return parse_audio_selector_unit(state, unitid, p1);
case FEATURE_UNIT:
return parse_audio_feature_unit(state, unitid, p1);
case PROCESSING_UNIT:
case PROCESSING_UNIT_V1:
return parse_audio_processing_unit(state, unitid, p1);
case EXTENSION_UNIT:
case EXTENSION_UNIT_V1:
return parse_audio_extension_unit(state, unitid, p1);
default:
snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);