[wdmaudiodev] USB Audio device Hi-Speed
- From: Danijel Spasojevic <danijel.spasojevic@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Fri, 24 Jul 2009 10:31:39 +0200
Hi everyone,
We are developing an USB Audio Device based on Cypress EZ-USB FX2LP and
are experiencing some problems that we believe are related to USB
descriptors.
The device works on FullSpeed hosts/hubs but not on HiSpeed. The device
enumerates in both cases but the recording does not work on Hi Speed.
This is a recording device only.
We recorded the USB traffic and it seems we are not getting the IN
tokens for audio EP. Below is the descriptor for the Hi Speed part.
Could someone take a look to this descriptor. We would appreciate any help.
Does the generic USB audio driver work with Hi Speed USB Audio devices
compliant with USB Audio Class 1.0 specification?
Thanks in advance,
Danijel
;;**************************************************Audio******************************************************
;;Standard Interface Descriptor - audio control
db DSCR_INTRFC_LEN ;; Descriptor length
db DSCR_INTRFC ;; Descriptor type
db 01h ;; bIfaceNum - interface
number
db 00h ;; bAltSetting -
Alternate setting 0 (no others)
db 00h ;; bNumEndpoints -
Number of endpoints = use EP0 only
db 01h ;; bIfaceClass -
Interface class 01=AUDIO
db 01h ;; bIfaceSubClass -
Audio Control
db 00h ;; bIfaceProtocol - none
db 00h ;; iInterface - no string
Usb_ac_iface_hs:
;;Class Specific Audio Control Interface Descriptor Header
db 09h ;; bLength
db 24h ;; Audio class
specific interface descriptor
db 01h ;; HEADER type
dw 0001H ;; Specification
Version (BCD)
db (Usb_ac_iface_end_hs-Usb_ac_iface_hs) mod 256 ;; Total
Length (LSB)
db (Usb_ac_iface_end_hs-Usb_ac_iface_hs) / 256 ;; Total
Length (MSB)
db 01h ;; number of
streaming interfaces
db 02h ;; Interface
number=2 belongs to this control IF
;;CS-specific Input Terminal Descriptor
db 0ch ;; bLength
db 24h ;; Audio class specific
interface desc
db 02h ;; Input Terminal
db IT_ID1 ;; TerminalID
dw 0102h ;; TerminalType = Microphone
db 00h ;; output AssocTerminal
db 01h ;; Number of Channels
dw 0000h ;; wChannelConfig = Mono
db 00h ;; iChannelNames=none
db 00h ;; iTerminal
;;CS-specific Feature Unit Descriptor
db 09h ;; bLength
db 24h ;; Audio class specific
interface desc
db 06h ;; Feature Unit descriptor
db FU_ID2 ;; Unit ID
db IT_ID1 ;; Source ID
db 01h ;; ControlSize Length in
bytes of bmaControls
db 03h ;; bmaControls(0) defines
supported features in master channel
db 00h ;; bmaControls(1) defines
supported features in log. channel 0:
db 00h ;; iFeature - index of string
descriptor, descr. feature unit
;;CS-specific Output Terminal Descriptor
db 09h ;; bLength
db 24h ;; Audio class specific
interface desc
db 03h ;; Output Terminal
db OT_ID3 ;; TerminalID
dw 0101h ;; TerminalType streaming
db 00h ;; bAssocTerminal=terminalID
connect to=0?
db FU_ID2 ;; SourceID=TerminalID which is
the source for this terminal
db 00h ;; iTerminal=string
Usb_ac_iface_end_hs:
; Standard Interface Descriptor for alternate setting 0
db DSCR_INTRFC_LEN ;; Descriptor length
db DSCR_INTRFC ;; Descriptor type
db 02h ;; bInterfaceNumber
db 00h ;; bAlternateSetting 0
db 00h ;; bNumEndpoints Number of endpoints
db 01h ;; bIfaceClass Interface class 01=AUDIO
db 02h ;; bIfaceSubClass Audio Streaming
db 00h ;; bIfaceProtocol none
db 00h ;; iInterface String
;; Standard Interface Descriptor for alternate setting 1
db DSCR_INTRFC_LEN ;; Descriptor length
db DSCR_INTRFC ;; Descriptor type
db 02h ;; bInterfaceNumber
db 01h ;; bAlternateSetting 1
db 01h ;; bNumEndpoints Number of endpoints
db 01h ;; bIfaceClass Interface class 01=AUDIO
db 02h ;; bIfaceSubClass Audio Streaming
db 00h ;; bIfaceProtocol none
db 00h ;; iInterface String
;;CS-Audio Streaming Interface General Descriptor for alternate setting
db 07h ;; bLength
db 24h ;; Audio Class Specific AS Interface Desc.
db 01h ;; AS_GENERAL
db OT_ID3 ;; TermLink connected to Upstream OT
db 00h ;; Delay=0
dw 0100h ;; FormatTag=PCM
;; CS-Audio Streaming Interface Format Type 1 Descriptor
db 0bh ;; bLength ; Format Specification
db 24h ;; Audio Class Specific AS Interface
Desc.
db 02h ;; Subtype
db 01h ;; formatType
db 01h ;; NrChannels
db 02h ;; SubFrameSize
db 10h ;; BitResolution
db 01h ;; number of sampling freq
dw 80bbh ;; 48kHz
db 00h ;; hi byte
;;Standard Isochronous Audio Data Endpoint for alternate setting
db 09h ;; bLength Length of this descriptor
db 05h ;; bDescType 5=ENDPOINT
db 82h ;; bEndpointAddr End Point address
db 0Dh ;; bmAttr ISO syncronous rate
db 60h ;; wMaxPacketSize LSB 96 bytes
db 00h ;; wMaxPacketSize MSB 96 bytes
db 08h ;; bInterval
db 00h ;; bRefresh
db 00h ;; SyncAddr None
;;CS-Isochronous Audio Data Endpoint Desriptor include for alternate
setting
db 07h ;; bLength Length of this descriptor
db 25h ;; bDescType Class specific ENDPOINT
db 01h ;; SubType GENERAL
db 01h ;; bmAttr: Samplingrate
db 02h ;; bLockDelayUnits
dw 0100h ;; bLockDelay
HighSpeedConfigDscrEnd:
--
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