gotgctl

Mode: Host and Device
Current Mode of Operation (CurMod)
Indicates the current mode.
 1'b0: Device mode
 1'b1: Host mode

OTG Version (OTGVer)
Indicates the OTG revision.
 1'b0: OTG Version 1.3. In this version the core supports Data line
       pulsing and VBus pulsing for SRP.
 1'b1: OTG Version 2.0. In this version the core supports only Data
       line pulsing for SRP.

Mode: Device only
B-Session Valid (BSesVld)
Indicates the Device mode transceiver status.
 1'b0: B-session is not valid.
 1'b1: B-session is valid.
In OTG mode, you can use this bit to determine IF the device is
connected or disconnected.
Note: If you do not enabled OTG features (such as SRP and HNP), the
read reset value will be 1.The vbus assigns the values internally for non-
SRP or non-HNP configurations.

Mode: Host only
A-Session Valid (ASesVld)
Indicates the Host mode transceiver status.
 1'b0: A-session is not valid
 1'b1: A-session is valid
Note: If you do not enabled OTG features (such as SRP and HNP), the
read reset value will be 1.The vbus assigns the values internally for non-
SRP or non-HNP configurations.

Mode: Host only
Long/Short Debounce Time (DbncTime)
Indicates the debounce time of a detected connection.
 1'b0: Long debounce time, used FOR physical connections
(100 ms + 2.5 micro-sec)
 1'b1: Short debounce time, used FOR soft connections (2.5 micro-sec)

Mode: Host and Device
Connector ID Status (ConIDSts)
Indicates the connector ID status on a connect event.
 1'b0: The DWC_otg core is in A-Device mode
 1'b1: The DWC_otg core is in B-Device mode

Mode: SRP Capable Host
Embedded Host Enable (EHEn)
1’b1 : Enable Embedded Host Mode.
1’b0: Disable Embedded Host Mode.

Mode: Device only
Device HNP Enabled (DevHNPEn)
The application sets this bit when it successfully receives a
SetFeature.SetHNPEnable command from the connected USB
host.
 1'b0: HNP is not enabled in the application
 1'b1: HNP is enabled in the application

Mode: Host only
Host Set HNP Enable (HstSetHNPEn)
The application sets this bit when it has successfully enabled
HNP (using the SetFeature.SetHNPEnable command) on the
connected device.
 1'b0: Host Set HNP is not enabled
 1'b1: Host Set HNP is enabled

Mode: Device only
HNP Request (HNPReq)
The application sets this bit to initiate an HNP request to the
connected USB host. The application can clear this bit by writing
a 0 when the Host Negotiation Success Status Change bit in the
OTG Interrupt register (GOTGINT.HstNegSucStsChng) is SET.
The core clears this bit when the HstNegSucStsChng bit is
cleared.
 1'b0: No HNP request
 1'b1: HNP request

Mode: Device only
Host Negotiation Success (HstNegScs)
The core sets this bit when host negotiation is successful. The
core clears this bit when the HNP Request (HNPReq) bit in this
register is SET.
 1'b0: Host negotiation failure
 1'b1: Host negotiation success

B-Peripheral Session Valid OverrideValue (BvalidOvVal)
This bit is used to set Override value for Bvalid 
signal when GOTGCTL.BvalidOvEn is set.
1'b0 : Bvalid value is 1'b0 when GOTGCTL.BvalidOvEn =1
1'b1 : Bvalid value is 1'b1 when GOTGCTL.BvalidOvEn =1

B-Peripheral Session Valid Override Enable (BvalidOvEn)
This bit is used to enable/disable the software to 
override the Bvalid signal using the GOTGCTL.BvalidOvVal.
1'b1 : Internally Bvalid received from the PHY is overridden with GOTGCTL.BvalidOvVal.
1'b0 : Override is disabled and bvalid signal from the respective PHY selected is used
internally by the force

A-Peripheral Session Valid OverrideValue (AvalidOvVal)
This bit is used to set Override value for Avalid signal
when GOTGCTL.AvalidOvEn is set.
1'b0 : Avalid value is 1'b0 when GOTGCTL.AvalidOvEn =1
1'b1 : Avalid value is 1'b1 when GOTGCTL.AvalidOvEn =1

A-Peripheral Session Valid Override Enable (AvalidOvEn)
This bit is used to enable/disable the software to  
override the Avalid signal using the GOTGCTL.AvalidOvVal.
1'b1 : Internally Avalid received from the PHY is overridden with GOTGCTL.AvalidOvVal.
1'b0 : Override is disabled and avalid signal from the respective PHY selected is used
internally by the core

VBUS Valid OverrideValue (VbvalidOvVal)
This bit is used to set Override value for vbusvalid
signal when GOTGCTL.VbvalidOvEn is set.
1'b0 : vbusvalid value is 1'b0 when GOTGCTL.VbvalidOvEn =1
1'b1 : vbusvalid value is 1'b1 when GOTGCTL.VbvalidOvEn =1

VBUS Valid Override Enable (VbvalidOvEn)  
This bit is used to enable/disable the software to
override the Bvalid signal using the GOTGCTL.VbvalidOvVal.
1'b1 : Internally Bvalid received from the PHY is overridden with GOTGCTL.VbvalidOvVal.
1'b0 : Override is disabled and bvalid signal from the respective PHY selected is used
internally by the core

Mode: Device only
Session Request (SesReq)
The application sets this bit to initiate a session request on the
USB. The application can clear this bit by writing a 0 when the
Host Negotiation Success Status Change bit in the OTG
Interrupt register (GOTGINT.HstNegSucStsChng) is SET. The
core clears this bit when the HstNegSucStsChng bit is cleared.
If you use the USB 1.1 Full-Speed Serial Transceiver interface to
initiate the session request, the application must wait until the
VBUS discharges to 0.2 V, after the B-Session Valid bit in this
register (GOTGCTL.BSesVld) is cleared. This discharge time
varies between different PHYs and can be obtained from the
PHY vendor.
 1'b0: No session request
 1'b1: Session request

Mode: Device only
Session Request Success (SesReqScs)
The core sets this bit when a session request initiation is
successful.
 1'b0: Session request failure
 1'b1: Session request success