[alsa-devel] [PATCH 1/2] USB: audio: add USB audio class definitions
Mike Frysinger
vapier at gentoo.org
Wed Jun 3 15:17:57 CEST 2009
From: Bryan Wu <cooloney at kernel.org>
Signed-off-by: Bryan Wu <cooloney at kernel.org>
Signed-off-by: Mike Frysinger <vapier at gentoo.org>
---
include/linux/usb/audio.h | 265 ++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 263 insertions(+), 2 deletions(-)
diff --git a/include/linux/usb/audio.h b/include/linux/usb/audio.h
index 8cb025f..b5744bc 100644
--- a/include/linux/usb/audio.h
+++ b/include/linux/usb/audio.h
@@ -24,10 +24,75 @@
#define USB_SUBCLASS_AUDIOCONTROL 0x01
#define USB_SUBCLASS_AUDIOSTREAMING 0x02
#define USB_SUBCLASS_MIDISTREAMING 0x03
+#define USB_SUBCLASS_VENDOR_SPEC 0xff
+/* A.5 Audio Class-Specific AC interface Descriptor Subtypes*/
+#define HEADER 0x01
+#define INPUT_TERMINAL 0x02
+#define OUTPUT_TERMINAL 0x03
+#define MIXER_UNIT 0x04
+#define SELECTOR_UNIT 0x05
+#define FEATURE_UNIT 0x06
+#define PROCESSING_UNIT 0x07
+#define EXTENSION_UNIT 0x08
+
+#define AS_GENERAL 0x01
+#define FORMAT_TYPE 0x02
+#define FORMAT_SPECIFIC 0x03
+
+#define EP_GENERAL 0x01
+
+#define MS_GENERAL 0x01
+#define MIDI_IN_JACK 0x02
+#define MIDI_OUT_JACK 0x03
+
+/* endpoint attributes */
+#define EP_ATTR_MASK 0x0c
+#define EP_ATTR_ASYNC 0x04
+#define EP_ATTR_ADAPTIVE 0x08
+#define EP_ATTR_SYNC 0x0c
+
+/* cs endpoint attributes */
+#define EP_CS_ATTR_SAMPLE_RATE 0x01
+#define EP_CS_ATTR_PITCH_CONTROL 0x02
+#define EP_CS_ATTR_FILL_MAX 0x80
+
+/* Audio Class specific Request Codes */
+#define USB_AUDIO_SET_INTF 0x21
+#define USB_AUDIO_SET_ENDPOINT 0x22
+#define USB_AUDIO_GET_INTF 0xa1
+#define USB_AUDIO_GET_ENDPOINT 0xa2
+
+#define SET_ 0x00
+#define GET_ 0x80
+
+#define _CUR 0x1
+#define _MIN 0x2
+#define _MAX 0x3
+#define _RES 0x4
+#define _MEM 0x5
+
+#define SET_CUR (SET_ | _CUR)
+#define GET_CUR (GET_ | _CUR)
+#define SET_MIN (SET_ | _MIN)
+#define GET_MIN (GET_ | _MIN)
+#define SET_MAX (SET_ | _MAX)
+#define GET_MAX (GET_ | _MAX)
+#define SET_RES (SET_ | _RES)
+#define GET_RES (GET_ | _RES)
+#define SET_MEM (SET_ | _MEM)
+#define GET_MEM (GET_ | _MEM)
+
+#define GET_STAT 0xff
+
+#define USB_AC_TERMINAL_UNDEFINED 0x100
+#define USB_AC_TERMINAL_STREAMING 0x101
+#define USB_AC_TERMINAL_VENDOR_SPEC 0x1FF
+
+/* Terminal Control Selectors */
/* 4.3.2 Class-Specific AC Interface Descriptor */
struct usb_ac_header_descriptor {
- __u8 bLength; /* 8+n */
+ __u8 bLength; /* 8 + n */
__u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
__u8 bDescriptorSubtype; /* USB_MS_HEADER */
__le16 bcdADC; /* 0x0100 */
@@ -36,7 +101,7 @@ struct usb_ac_header_descriptor {
__u8 baInterfaceNr[]; /* [n] */
} __attribute__ ((packed));
-#define USB_DT_AC_HEADER_SIZE(n) (8+(n))
+#define USB_DT_AC_HEADER_SIZE(n) (8 + (n))
/* As above, but more useful for defining your own descriptors: */
#define DECLARE_USB_AC_HEADER_DESCRIPTOR(n) \
@@ -50,4 +115,200 @@ struct usb_ac_header_descriptor_##n { \
__u8 baInterfaceNr[n]; \
} __attribute__ ((packed))
+/* 4.3.2.1 Input Terminal Descriptor */
+struct usb_input_terminal_descriptor {
+ __u8 bLength; /* in bytes: 12 */
+ __u8 bDescriptorType; /* CS_INTERFACE descriptor type */
+ __u8 bDescriptorSubtype; /* INPUT_TERMINAL descriptor subtype */
+ __u8 bTerminalID; /* Constant uniquely terminal ID */
+ __le16 wTerminalType; /* USB Audio Terminal Types */
+ __u8 bAssocTerminal; /* ID of the Output Terminal associated */
+ __u8 bNrChannels; /* Number of logical output channels */
+ __le16 wChannelConfig;
+ __u8 iChannelNames;
+ __u8 iTerminal;
+} __attribute__ ((packed));
+
+#define USB_DT_AC_INPUT_TERMINAL_SIZE 12
+
+#define USB_AC_INPUT_TERMINAL_UNDEFINED 0x200
+#define USB_AC_INPUT_TERMINAL_MICROPHONE 0x201
+#define USB_AC_INPUT_TERMINAL_DESKTOP_MICROPHONE 0x202
+#define USB_AC_INPUT_TERMINAL_PERSONAL_MICROPHONE 0x203
+#define USB_AC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE 0x204
+#define USB_AC_INPUT_TERMINAL_MICROPHONE_ARRAY 0x205
+#define USB_AC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY 0x206
+
+/* 4.3.2.2 Output Terminal Descriptor */
+struct usb_output_terminal_descriptor {
+ __u8 bLength; /* in bytes: 9 */
+ __u8 bDescriptorType; /* CS_INTERFACE descriptor type */
+ __u8 bDescriptorSubtype; /* OUTPUT_TERMINAL descriptor subtype */
+ __u8 bTerminalID; /* Constant uniquely terminal ID */
+ __le16 wTerminalType; /* USB Audio Terminal Types */
+ __u8 bAssocTerminal; /* ID of the Input Terminal associated */
+ __u8 bSourceID; /* ID of the connected Unit or Terminal*/
+ __u8 iTerminal;
+} __attribute__ ((packed));
+
+#define USB_DT_AC_OUTPUT_TERMINAL_SIZE 9
+
+#define USB_AC_OUTPUT_TERMINAL_UNDEFINED 0x300
+#define USB_AC_OUTPUT_TERMINAL_SPEAKER 0x301
+#define USB_AC_OUTPUT_TERMINAL_HEADPHONES 0x302
+#define USB_AC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO 0x303
+#define USB_AC_OUTPUT_TERMINAL_DESKTOP_SPEAKER 0x304
+#define USB_AC_OUTPUT_TERMINAL_ROOM_SPEAKER 0x305
+#define USB_AC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER 0x306
+#define USB_AC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER 0x307
+
+/* Set bControlSize = 2 as default setting */
+#define USB_DT_AC_FEATURE_UNIT_SIZE(ch) (7 + ((ch) + 1) * 2)
+
+/* As above, but more useful for defining your own descriptors: */
+#define DECLARE_USB_AC_FEATURE_UNIT_DESCRIPTOR(ch) \
+struct usb_ac_feature_unit_descriptor_##ch { \
+ __u8 bLength; \
+ __u8 bDescriptorType; \
+ __u8 bDescriptorSubtype; \
+ __u8 bUnitID; \
+ __u8 bSourceID; \
+ __u8 bControlSize; \
+ __le16 bmaControls[ch + 1]; \
+ __u8 iFeature; \
+} __attribute__ ((packed))
+
+/* 4.5.2 Class-Specific AS Interface Descriptor */
+struct usb_as_header_descriptor {
+ __u8 bLength; /* in bytes: 7 */
+ __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
+ __u8 bDescriptorSubtype; /* AS_GENERAL */
+ __u8 bTerminalLink; /* Terminal ID of connected Terminal */
+ __u8 bDelay; /* Delay introduced by the data path */
+ __le16 wFormatTag; /* The Audio Data Format */
+} __attribute__ ((packed));
+
+#define USB_DT_AS_HEADER_SIZE 7
+
+#define USB_AS_AUDIO_FORMAT_TYPE_I_UNDEFINED 0x0
+#define USB_AS_AUDIO_FORMAT_TYPE_I_PCM 0x1
+#define USB_AS_AUDIO_FORMAT_TYPE_I_PCM8 0x2
+#define USB_AS_AUDIO_FORMAT_TYPE_I_IEEE_FLOAT 0x3
+#define USB_AS_AUDIO_FORMAT_TYPE_I_ALAW 0x4
+#define USB_AS_AUDIO_FORMAT_TYPE_I_MULAW 0x5
+
+struct usb_as_format_type_i_continuous_descriptor {
+ __u8 bLength; /* in bytes: 8 + (ns * 3) */
+ __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
+ __u8 bDescriptorSubtype; /* FORMAT_TYPE */
+ __u8 bFormatType; /* FORMAT_TYPE_1 */
+ __u8 bNrChannels; /* physical channels in the stream */
+ __u8 bSubframeSize; /* */
+ __u8 bBitResolution;
+ __u8 bSamFreqType;
+ __u8 tLowerSamFreq[3];
+ __u8 tUpperSamFreq[3];
+} __attribute__ ((packed));
+
+#define USB_AS_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE 14
+
+struct usb_as_formate_type_i_discrete_descriptor {
+ __u8 bLength; /* in bytes: 8 + (ns * 3) */
+ __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
+ __u8 bDescriptorSubtype; /* FORMAT_TYPE */
+ __u8 bFormatType; /* FORMAT_TYPE_1 */
+ __u8 bNrChannels; /* physical channels in the stream */
+ __u8 bSubframeSize; /* */
+ __u8 bBitResolution;
+ __u8 bSamFreqType;
+ __u8 tSamFreq[][3];
+} __attribute__ ((packed));
+
+#define DECLARE_USB_AS_FORMAT_TYPE_I_DISCRETE_DESC(n) \
+struct usb_as_formate_type_i_discrete_descriptor_##n { \
+ __u8 bLength; \
+ __u8 bDescriptorType; \
+ __u8 bDescriptorSubtype; \
+ __u8 bFormatType; \
+ __u8 bNrChannels; \
+ __u8 bSubframeSize; \
+ __u8 bBitResolution; \
+ __u8 bSamFreqType; \
+ __u8 tSamFreq[n][3]; \
+} __attribute__ ((packed))
+
+#define USB_AS_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3))
+
+#define USB_AS_FORMAT_TYPE_UNDEFINED 0x0
+#define USB_AS_FORMAT_TYPE_I 0x1
+#define USB_AS_FORMAT_TYPE_II 0x2
+#define USB_AS_FORMAT_TYPE_III 0x3
+
+#define USB_AS_ENDPOINT_ASYNC (1 << 2)
+#define USB_AS_ENDPOINT_ADAPTIVE (2 << 2)
+#define USB_AS_ENDPOINT_SYNC (3 << 2)
+
+struct usb_as_iso_endpoint_descriptor {
+ __u8 bLength; /* in bytes: 7 */
+ __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */
+ __u8 bDescriptorSubtype; /* EP_GENERAL */
+ __u8 bmAttributes;
+ __u8 bLockDelayUnits;
+ __le16 wLockDelay;
+};
+#define USB_AS_ISO_ENDPOINT_DESC_SIZE 7
+
+#define FU_CONTROL_UNDEFINED 0x00
+#define MUTE_CONTROL 0x01
+#define VOLUME_CONTROL 0x02
+#define BASS_CONTROL 0x03
+#define MID_CONTROL 0x04
+#define TREBLE_CONTROL 0x05
+#define GRAPHIC_EQUALIZER_CONTROL 0x06
+#define AUTOMATIC_GAIN_CONTROL 0x07
+#define DELAY_CONTROL 0x08
+#define BASS_BOOST_CONTROL 0x09
+#define LOUDNESS_CONTROL 0x0a
+
+#define FU_MUTE (1 << (MUTE_CONTROL - 1))
+#define FU_VOLUME (1 << (VOLUME_CONTROL - 1))
+#define FU_BASS (1 << (BASS_CONTROL - 1))
+#define FU_MID (1 << (MID_CONTROL - 1))
+#define FU_TREBLE (1 << (TREBLE_CONTROL - 1))
+#define FU_GRAPHIC_EQ (1 << (GRAPHIC_EQUALIZER_CONTROL - 1))
+#define FU_AUTO_GAIN (1 << (AUTOMATIC_GAIN_CONTROL - 1))
+#define FU_DELAY (1 << (DELAY_CONTROL - 1))
+#define FU_BASS_BOOST (1 << (BASS_BOOST_CONTROL - 1))
+#define FU_LOUDNESS (1 << (LOUDNESS_CONTROL - 1))
+
+struct usb_audio_control {
+ struct list_head list;
+ const char *name;
+ u8 type;
+ int data[5];
+ int (*set)(struct usb_audio_control *con, u8 cmd, int value);
+ int (*get)(struct usb_audio_control *con, u8 cmd);
+};
+
+static inline int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value)
+{
+ con->data[cmd] = value;
+
+ return 0;
+}
+
+static inline int generic_get_cmd(struct usb_audio_control *con, u8 cmd)
+{
+ return con->data[cmd];
+}
+
+struct usb_audio_control_selector {
+ struct list_head list;
+ struct list_head control;
+ u8 id;
+ const char *name;
+ u8 type;
+ struct usb_descriptor_header *desc;
+};
+
#endif /* __LINUX_USB_AUDIO_H */
--
1.6.3.1
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