dwc_otg_hcd_if.h File Reference

This file defines DWC_OTG HCD Core API. More...

#include "dwc_otg_core_if.h"

Go to the source code of this file.

Data Structures

struct dwc_otg_hcd_function_ops

HCD Core API

#define URB_GIVEBACK_ASAP 0x1

#define URB_SEND_ZERO_PACKET 0x2

dwc_otg_hcd_t * dwc_otg_hcd_alloc_hcd (void)

This function allocates dwc_otg_hcd structure and returns pointer on it.

int dwc_otg_hcd_init (dwc_otg_hcd_t *hcd, dwc_otg_core_if_t *core_if)

This function should be called to initiate HCD Core.

void dwc_otg_hcd_remove (dwc_otg_hcd_t *hcd)

Frees HCD.

int32_t dwc_otg_hcd_handle_intr (dwc_otg_hcd_t *dwc_otg_hcd)

This function should be called on every hardware interrupt.

void * dwc_otg_hcd_get_priv_data (dwc_otg_hcd_t *hcd)

Returns private data set by dwc_otg_hcd_set_priv_data function.

void dwc_otg_hcd_set_priv_data (dwc_otg_hcd_t *hcd, void *priv_data)

Set private data.

int dwc_otg_hcd_start (dwc_otg_hcd_t *hcd, struct dwc_otg_hcd_function_ops *fops)

This function initializes the HCD Core.

void dwc_otg_hcd_stop (dwc_otg_hcd_t *hcd)

Halts the DWC_otg host mode operations in a clean manner.

int dwc_otg_hcd_hub_control (dwc_otg_hcd_t *dwc_otg_hcd, uint16_t typeReq, uint16_t wValue, uint16_t wIndex, uint8_t *buf, uint16_t wLength)

Handles hub class-specific requests.

uint32_t dwc_otg_hcd_otg_port (dwc_otg_hcd_t *hcd)

Returns otg port number.

uint32_t dwc_otg_hcd_is_b_host (dwc_otg_hcd_t *hcd)

Returns 1 if currently core is acting as B host, and 0 otherwise.

int dwc_otg_hcd_get_frame_number (dwc_otg_hcd_t *hcd)

Returns current frame number.

void dwc_otg_hcd_dump_state (dwc_otg_hcd_t *hcd)

Dumps hcd state.

void dwc_otg_hcd_dump_frrem (dwc_otg_hcd_t *hcd)

Dump the average frame remaining at SOF.

int dwc_otg_hcd_send_lpm (dwc_otg_hcd_t *hcd, uint8_t devaddr, uint8_t hird, uint8_t bRemoteWake)

Sends LPM transaction to the local device.

dwc_otg_hcd_urb_t * dwc_otg_hcd_urb_alloc (dwc_otg_hcd_t *hcd, int iso_desc_count, int atomic_alloc)

Allocates memory for dwc_otg_hcd_urb structure.

void dwc_otg_hcd_urb_set_pipeinfo (dwc_otg_hcd_urb_t *hcd_urb, uint8_t devaddr, uint8_t ep_num, uint8_t ep_type, uint8_t ep_dir, uint16_t mps)

Set pipe information in URB.

void dwc_otg_hcd_urb_set_params (dwc_otg_hcd_urb_t *urb, void *urb_handle, void *buf, dwc_dma_t dma, uint32_t buflen, void *sp, dwc_dma_t sp_dma, uint32_t flags, uint16_t interval)

Sets dwc_otg_hcd_urb parameters.

uint32_t dwc_otg_hcd_urb_get_status (dwc_otg_hcd_urb_t *dwc_otg_urb)

Gets status from dwc_otg_hcd_urb.

uint32_t dwc_otg_hcd_urb_get_actual_length (dwc_otg_hcd_urb_t *dwc_otg_urb)

Gets actual length from dwc_otg_hcd_urb.

uint32_t dwc_otg_hcd_urb_get_error_count (dwc_otg_hcd_urb_t *dwc_otg_urb)

Gets error count from dwc_otg_hcd_urb.

void dwc_otg_hcd_urb_set_iso_desc_params (dwc_otg_hcd_urb_t *dwc_otg_urb, int desc_num, uint32_t offset, uint32_t length)

Set ISOC descriptor offset and length.

uint32_t dwc_otg_hcd_urb_get_iso_desc_status (dwc_otg_hcd_urb_t *dwc_otg_urb, int desc_num)

Get status of ISOC descriptor, specified by desc_num.

uint32_t dwc_otg_hcd_urb_get_iso_desc_actual_length (dwc_otg_hcd_urb_t *dwc_otg_urb, int desc_num)

Get actual length of ISOC descriptor, specified by desc_num.

int dwc_otg_hcd_urb_enqueue (dwc_otg_hcd_t *dwc_otg_hcd, dwc_otg_hcd_urb_t *dwc_otg_urb, void **ep_handle)

Queue URB.

int dwc_otg_hcd_urb_dequeue (dwc_otg_hcd_t *dwc_otg_hcd, dwc_otg_hcd_urb_t *dwc_otg_urb)

De-queue the specified URB.

int dwc_otg_hcd_endpoint_disable (dwc_otg_hcd_t *hcd, void *ep_handle, int retry)

Frees resources in the DWC_otg controller related to a given endpoint.

int dwc_otg_hcd_is_status_changed (dwc_otg_hcd_t *hcd, int port)

Returns 1 if status of specified port is changed and 0 otherwise.

int dwc_otg_hcd_is_bandwidth_allocated (dwc_otg_hcd_t *hcd, void *ep_handle)

Call this function to check if bandwidth was allocated for specified endpoint.

int dwc_otg_hcd_is_bandwidth_freed (dwc_otg_hcd_t *hcd, void *ep_handle)

Call this function to check if bandwidth was freed for specified endpoint.

uint8_t dwc_otg_hcd_get_ep_bandwidth (dwc_otg_hcd_t *hcd, void *ep_handle)

Returns bandwidth allocated for specified endpoint in microseconds.

HCD Function Driver Callbacks

typedef int(*) dwc_otg_hcd_start_cb_t (dwc_otg_hcd_t *hcd)

This function is called whenever core switches to host mode.

typedef int(*) dwc_otg_hcd_disconnect_cb_t (dwc_otg_hcd_t *hcd)

This function is called when device has been disconnected.

typedef int(*) dwc_otg_hcd_hub_info_from_urb_cb_t (dwc_otg_hcd_t *hcd, void *urb_handle, uint32_t *hub_addr, uint32_t *port_addr)

Wrapper provides this function to HCD to core, so it can get hub information to which device is connected.

typedef int(*) dwc_otg_hcd_speed_from_urb_cb_t (dwc_otg_hcd_t *hcd, void *urb_handle)

Via this function HCD core gets device speed.

typedef int(*) dwc_otg_hcd_complete_urb_cb_t (dwc_otg_hcd_t *hcd, void *urb_handle, dwc_otg_hcd_urb_t *dwc_otg_urb, int32_t status)

This function is called when urb is completed.

typedef int(*) dwc_otg_hcd_get_b_hnp_enable (dwc_otg_hcd_t *hcd)

Via this function HCD core gets b_hnp_enable parameter.

Typedefs

typedef dwc_otg_hcd dwc_otg_hcd_t

typedef dwc_otg_hcd_urb dwc_otg_hcd_urb_t

Detailed Description

This file defines DWC_OTG HCD Core API.

Definition in file dwc_otg_hcd_if.h.

Function Documentation

int dwc_otg_hcd_init	(	dwc_otg_hcd_t *	hcd,
		dwc_otg_core_if_t *	core_if
	)

This function should be called to initiate HCD Core.

Parameters:

	hcd	The HCD
	core_if	The DWC_OTG Core

Returns -DWC_E_NO_MEMORY if no enough memory. Returns 0 on success

Definition at line 693 of file dwc_otg_hcd.c.

void dwc_otg_hcd_remove ( dwc_otg_hcd_t * hcd )

Frees HCD.

Parameters:

hcd

The HCD

Definition at line 778 of file dwc_otg_hcd.c.

int32_t dwc_otg_hcd_handle_intr ( dwc_otg_hcd_t * dwc_otg_hcd )

This function should be called on every hardware interrupt.

Parameters:

dwc_otg_hcd

The HCD

Returns non zero if interrupt is handled Return 0 if interrupt is not handled

Todo:: Implement i2cintr handler.

Definition at line 43 of file dwc_otg_hcd_intr.c.

void* dwc_otg_hcd_get_priv_data ( dwc_otg_hcd_t * hcd )

Returns private data set by dwc_otg_hcd_set_priv_data function.

Parameters:

hcd

The HCD

Definition at line 2671 of file dwc_otg_hcd.c.

void dwc_otg_hcd_set_priv_data	(	dwc_otg_hcd_t *	hcd,
		void *	priv_data
	)

Set private data.

Parameters:

	hcd	The HCD
	priv_data	pointer to be stored in private data

Definition at line 2676 of file dwc_otg_hcd.c.

int dwc_otg_hcd_start	(	dwc_otg_hcd_t *	hcd,
		struct dwc_otg_hcd_function_ops *	fops
	)

This function initializes the HCD Core.

Parameters:

	hcd	The HCD
	fops	The Function Driver Operations data structure containing pointers to all callbacks.

Returns -DWC_E_NO_DEVICE if Core is currently is in device mode. Returns 0 on success

Definition at line 2656 of file dwc_otg_hcd.c.

void dwc_otg_hcd_stop ( dwc_otg_hcd_t * hcd )

Halts the DWC_otg host mode operations in a clean manner.

USB transfers are stopped.

Definition at line 422 of file dwc_otg_hcd.c.

int dwc_otg_hcd_hub_control	(	dwc_otg_hcd_t *	dwc_otg_hcd,
		uint16_t	typeReq,
		uint16_t	wValue,
		uint16_t	wIndex,
		uint8_t *	buf,
		uint16_t	wLength
	)

Handles hub class-specific requests.

Parameters:

	dwc_otg_hcd	The HCD
	typeReq	Request Type
	wValue	wValue from control request
	wIndex	wIndex from control request
	buf	data buffer
	wLength	data buffer length

Returns -DWC_E_INVALID if invalid argument is passed Returns 0 on success

Definition at line 1905 of file dwc_otg_hcd.c.

uint32_t dwc_otg_hcd_otg_port ( dwc_otg_hcd_t * hcd )

Returns otg port number.

Parameters:

hcd

The HCD

Definition at line 2681 of file dwc_otg_hcd.c.

uint32_t dwc_otg_hcd_is_b_host ( dwc_otg_hcd_t * hcd )

Returns 1 if currently core is acting as B host, and 0 otherwise.

Parameters:

hcd

The HCD

Definition at line 2686 of file dwc_otg_hcd.c.

int dwc_otg_hcd_get_frame_number ( dwc_otg_hcd_t * hcd )

Returns current frame number.

Parameters:

hcd

The HCD

Definition at line 2643 of file dwc_otg_hcd.c.

void dwc_otg_hcd_dump_state ( dwc_otg_hcd_t * hcd )

Dumps hcd state.

Parameters:

hcd

The HCD

Definition at line 2815 of file dwc_otg_hcd.c.

void dwc_otg_hcd_dump_frrem ( dwc_otg_hcd_t * hcd )

Dump the average frame remaining at SOF.

This can be used to determine average interrupt latency. Frame remaining is also shown for start transfer and two additional sample points. Currently this function is not implemented.

Parameters:

hcd

The HCD

Definition at line 2991 of file dwc_otg_hcd.c.

int dwc_otg_hcd_send_lpm	(	dwc_otg_hcd_t *	hcd,
		uint8_t	devaddr,
		uint8_t	hird,
		uint8_t	bRemoteWake
	)

Sends LPM transaction to the local device.

Parameters:

	hcd	The HCD
	devaddr	Device Address
	hird	Host initiated resume duration
	bRemoteWake	Value of bRemoteWake field in LPM transaction

Returns negative value if sending LPM transaction was not succeeded. Returns 0 on success.

dwc_otg_hcd_urb_t* dwc_otg_hcd_urb_alloc	(	dwc_otg_hcd_t *	hcd,
		int	iso_desc_count,
		int	atomic_alloc
	)

Allocates memory for dwc_otg_hcd_urb structure.

Allocated memory should be freed by call dwc_free function.

Parameters:

	hcd	The HCD
	iso_desc_count	Count of ISOC descriptors
	atomic_alloc	Specefies whether to perform atomic allocation.

Definition at line 2698 of file dwc_otg_hcd.c.

void dwc_otg_hcd_urb_set_pipeinfo	(	dwc_otg_hcd_urb_t *	hcd_urb,
		uint8_t	devaddr,
		uint8_t	ep_num,
		uint8_t	ep_type,
		uint8_t	ep_dir,
		uint16_t	mps
	)

Set pipe information in URB.

Parameters:

	hcd_urb	DWC_OTG URB
	devaddr	Device Address
	ep_num	Endpoint Number
	ep_type	Endpoint Type
	ep_dir	Endpoint Direction
	mps	Max Packet Size

Definition at line 2717 of file dwc_otg_hcd.c.

void dwc_otg_hcd_urb_set_params	(	dwc_otg_hcd_urb_t *	urb,
		void *	urb_handle,
		void *	buf,
		dwc_dma_t	dma,
		uint32_t	buflen,
		void *	sp,
		dwc_dma_t	sp_dma,
		uint32_t	flags,
		uint16_t	interval
	)

Sets dwc_otg_hcd_urb parameters.

Parameters:

	urb	DWC_OTG URB allocated by dwc_otg_hcd_urb_alloc function.
	urb_handle	Unique handle for request, this will be passed back to function driver in completion callback.
	buf	The buffer for the data
	dma	The DMA buffer for the data
	buflen	Transfer length
	sp	Buffer for setup data
	sp_dma	DMA address of setup data buffer
	flags	Transfer flags
	interval	Polling interval for interrupt or isochronous transfers.

Definition at line 2730 of file dwc_otg_hcd.c.

uint32_t dwc_otg_hcd_urb_get_status ( dwc_otg_hcd_urb_t * dwc_otg_urb )

Gets status from dwc_otg_hcd_urb.

Parameters:

dwc_otg_urb

DWC_OTG URB

Definition at line 2747 of file dwc_otg_hcd.c.

uint32_t dwc_otg_hcd_urb_get_actual_length ( dwc_otg_hcd_urb_t * dwc_otg_urb )

Gets actual length from dwc_otg_hcd_urb.

Parameters:

dwc_otg_urb

DWC_OTG URB

Definition at line 2752 of file dwc_otg_hcd.c.

uint32_t dwc_otg_hcd_urb_get_error_count ( dwc_otg_hcd_urb_t * dwc_otg_urb )

Gets error count from dwc_otg_hcd_urb.

Only for ISOC URBs

Parameters:

dwc_otg_urb

DWC_OTG URB

Definition at line 2757 of file dwc_otg_hcd.c.

void dwc_otg_hcd_urb_set_iso_desc_params	(	dwc_otg_hcd_urb_t *	dwc_otg_urb,
		int	desc_num,
		uint32_t	offset,
		uint32_t	length
	)

Set ISOC descriptor offset and length.

Parameters:

	dwc_otg_urb	DWC_OTG URB
	desc_num	ISOC descriptor number
	offset	Offset from beginig of buffer.
	length	Transaction length

Definition at line 2762 of file dwc_otg_hcd.c.

uint32_t dwc_otg_hcd_urb_get_iso_desc_status	(	dwc_otg_hcd_urb_t *	dwc_otg_urb,
		int	desc_num
	)

Get status of ISOC descriptor, specified by desc_num.

Parameters:

	dwc_otg_urb	DWC_OTG URB
	desc_num	ISOC descriptor number

Definition at line 2770 of file dwc_otg_hcd.c.

uint32_t dwc_otg_hcd_urb_get_iso_desc_actual_length	(	dwc_otg_hcd_urb_t *	dwc_otg_urb,
		int	desc_num
	)

Get actual length of ISOC descriptor, specified by desc_num.

Parameters:

	dwc_otg_urb	DWC_OTG URB
	desc_num	ISOC descriptor number

Definition at line 2776 of file dwc_otg_hcd.c.

int dwc_otg_hcd_urb_enqueue	(	dwc_otg_hcd_t *	dwc_otg_hcd,
		dwc_otg_hcd_urb_t *	dwc_otg_urb,
		void **	ep_handle
	)

Queue URB.

After transfer is completes, the complete callback will be called with the URB status

Parameters:

	dwc_otg_hcd	The HCD
	dwc_otg_urb	DWC_OTG URB
	ep_handle	Out parameter for returning endpoint handle

Returns -DWC_E_NO_DEVICE if no device is connected. Returns -DWC_E_NO_MEMORY if there is no enough memory. Returns 0 on success.

Definition at line 444 of file dwc_otg_hcd.c.

int dwc_otg_hcd_urb_dequeue	(	dwc_otg_hcd_t *	dwc_otg_hcd,
		dwc_otg_hcd_urb_t *	dwc_otg_urb
	)

De-queue the specified URB.

Parameters:

	dwc_otg_hcd	The HCD
	dwc_otg_urb	DWC_OTG URB

Definition at line 489 of file dwc_otg_hcd.c.

int dwc_otg_hcd_endpoint_disable	(	dwc_otg_hcd_t *	hcd,
		void *	ep_handle,
		int	retry
	)

Frees resources in the DWC_otg controller related to a given endpoint.

Any URBs for the endpoint must already be dequeued.

Parameters:

	hcd	The HCD
	ep_handle	Endpoint handle, returned by dwc_otg_hcd_urb_enqueue function
	retry	Number of retries if there are queued transfers.

Returns -DWC_E_INVALID if invalid arguments are passed. Returns 0 on success

Definition at line 547 of file dwc_otg_hcd.c.

int dwc_otg_hcd_is_status_changed	(	dwc_otg_hcd_t *	hcd,
		int	port
	)

Returns 1 if status of specified port is changed and 0 otherwise.

Parameters:

	hcd	The HCD
	port	Port number

Definition at line 2611 of file dwc_otg_hcd.c.

int dwc_otg_hcd_is_bandwidth_allocated	(	dwc_otg_hcd_t *	hcd,
		void *	ep_handle
	)

Call this function to check if bandwidth was allocated for specified endpoint.

Only for ISOC and INTERRUPT endpoints.

Parameters:

	hcd	The HCD
	ep_handle	Endpoint handle

Definition at line 2782 of file dwc_otg_hcd.c.

int dwc_otg_hcd_is_bandwidth_freed	(	dwc_otg_hcd_t *	hcd,
		void *	ep_handle
	)

Call this function to check if bandwidth was freed for specified endpoint.

Parameters:

	hcd	The HCD
	ep_handle	Endpoint handle

Definition at line 2795 of file dwc_otg_hcd.c.

uint8_t dwc_otg_hcd_get_ep_bandwidth	(	dwc_otg_hcd_t *	hcd,
		void *	ep_handle
	)

Returns bandwidth allocated for specified endpoint in microseconds.

Only for ISOC and INTERRUPT endpoints.

Parameters:

	hcd	The HCD
	ep_handle	Endpoint handle

Definition at line 2808 of file dwc_otg_hcd.c.

Generated on Tue May 5 02:22:49 2009 for DesignWare USB 2.0 OTG Controller (DWC_otg) Device Driver by

1.4.7


Data Structures
struct	dwc_otg_hcd_function_ops
HCD Core API
#define	URB_GIVEBACK_ASAP 0x1
#define	URB_SEND_ZERO_PACKET 0x2
dwc_otg_hcd_t *	dwc_otg_hcd_alloc_hcd (void)
	This function allocates dwc_otg_hcd structure and returns pointer on it.
int	dwc_otg_hcd_init (dwc_otg_hcd_t hcd, dwc_otg_core_if_t core_if)
	This function should be called to initiate HCD Core.
void	dwc_otg_hcd_remove (dwc_otg_hcd_t *hcd)
	Frees HCD.
int32_t	dwc_otg_hcd_handle_intr (dwc_otg_hcd_t *dwc_otg_hcd)
	This function should be called on every hardware interrupt.
void *	dwc_otg_hcd_get_priv_data (dwc_otg_hcd_t *hcd)
	Returns private data set by dwc_otg_hcd_set_priv_data function.
void	dwc_otg_hcd_set_priv_data (dwc_otg_hcd_t hcd, void priv_data)
	Set private data.
int	dwc_otg_hcd_start (dwc_otg_hcd_t hcd, struct dwc_otg_hcd_function_ops fops)
	This function initializes the HCD Core.
void	dwc_otg_hcd_stop (dwc_otg_hcd_t *hcd)
	Halts the DWC_otg host mode operations in a clean manner.
int	dwc_otg_hcd_hub_control (dwc_otg_hcd_t dwc_otg_hcd, uint16_t typeReq, uint16_t wValue, uint16_t wIndex, uint8_t buf, uint16_t wLength)
	Handles hub class-specific requests.
uint32_t	dwc_otg_hcd_otg_port (dwc_otg_hcd_t *hcd)
	Returns otg port number.
uint32_t	dwc_otg_hcd_is_b_host (dwc_otg_hcd_t *hcd)
	Returns 1 if currently core is acting as B host, and 0 otherwise.
int	dwc_otg_hcd_get_frame_number (dwc_otg_hcd_t *hcd)
	Returns current frame number.
void	dwc_otg_hcd_dump_state (dwc_otg_hcd_t *hcd)
	Dumps hcd state.
void	dwc_otg_hcd_dump_frrem (dwc_otg_hcd_t *hcd)
	Dump the average frame remaining at SOF.
int	dwc_otg_hcd_send_lpm (dwc_otg_hcd_t *hcd, uint8_t devaddr, uint8_t hird, uint8_t bRemoteWake)
	Sends LPM transaction to the local device.
dwc_otg_hcd_urb_t *	dwc_otg_hcd_urb_alloc (dwc_otg_hcd_t *hcd, int iso_desc_count, int atomic_alloc)
	Allocates memory for dwc_otg_hcd_urb structure.
void	dwc_otg_hcd_urb_set_pipeinfo (dwc_otg_hcd_urb_t *hcd_urb, uint8_t devaddr, uint8_t ep_num, uint8_t ep_type, uint8_t ep_dir, uint16_t mps)
	Set pipe information in URB.
void	dwc_otg_hcd_urb_set_params (dwc_otg_hcd_urb_t urb, void urb_handle, void buf, dwc_dma_t dma, uint32_t buflen, void sp, dwc_dma_t sp_dma, uint32_t flags, uint16_t interval)
	Sets dwc_otg_hcd_urb parameters.
uint32_t	dwc_otg_hcd_urb_get_status (dwc_otg_hcd_urb_t *dwc_otg_urb)
	Gets status from dwc_otg_hcd_urb.
uint32_t	dwc_otg_hcd_urb_get_actual_length (dwc_otg_hcd_urb_t *dwc_otg_urb)
	Gets actual length from dwc_otg_hcd_urb.
uint32_t	dwc_otg_hcd_urb_get_error_count (dwc_otg_hcd_urb_t *dwc_otg_urb)
	Gets error count from dwc_otg_hcd_urb.
void	dwc_otg_hcd_urb_set_iso_desc_params (dwc_otg_hcd_urb_t *dwc_otg_urb, int desc_num, uint32_t offset, uint32_t length)
	Set ISOC descriptor offset and length.
uint32_t	dwc_otg_hcd_urb_get_iso_desc_status (dwc_otg_hcd_urb_t *dwc_otg_urb, int desc_num)
	Get status of ISOC descriptor, specified by desc_num.
uint32_t	dwc_otg_hcd_urb_get_iso_desc_actual_length (dwc_otg_hcd_urb_t *dwc_otg_urb, int desc_num)
	Get actual length of ISOC descriptor, specified by desc_num.
int	dwc_otg_hcd_urb_enqueue (dwc_otg_hcd_t dwc_otg_hcd, dwc_otg_hcd_urb_t dwc_otg_urb, void **ep_handle)
	Queue URB.
int	dwc_otg_hcd_urb_dequeue (dwc_otg_hcd_t dwc_otg_hcd, dwc_otg_hcd_urb_t dwc_otg_urb)
	De-queue the specified URB.
int	dwc_otg_hcd_endpoint_disable (dwc_otg_hcd_t hcd, void ep_handle, int retry)
	Frees resources in the DWC_otg controller related to a given endpoint.
int	dwc_otg_hcd_is_status_changed (dwc_otg_hcd_t *hcd, int port)
	Returns 1 if status of specified port is changed and 0 otherwise.
int	dwc_otg_hcd_is_bandwidth_allocated (dwc_otg_hcd_t hcd, void ep_handle)
	Call this function to check if bandwidth was allocated for specified endpoint.
int	dwc_otg_hcd_is_bandwidth_freed (dwc_otg_hcd_t hcd, void ep_handle)
	Call this function to check if bandwidth was freed for specified endpoint.
uint8_t	dwc_otg_hcd_get_ep_bandwidth (dwc_otg_hcd_t hcd, void ep_handle)
	Returns bandwidth allocated for specified endpoint in microseconds.
HCD Function Driver Callbacks
typedef int(*)	dwc_otg_hcd_start_cb_t (dwc_otg_hcd_t *hcd)
	This function is called whenever core switches to host mode.
typedef int(*)	dwc_otg_hcd_disconnect_cb_t (dwc_otg_hcd_t *hcd)
	This function is called when device has been disconnected.
typedef int(*)	dwc_otg_hcd_hub_info_from_urb_cb_t (dwc_otg_hcd_t hcd, void urb_handle, uint32_t hub_addr, uint32_t port_addr)
	Wrapper provides this function to HCD to core, so it can get hub information to which device is connected.
typedef int(*)	dwc_otg_hcd_speed_from_urb_cb_t (dwc_otg_hcd_t hcd, void urb_handle)
	Via this function HCD core gets device speed.
typedef int(*)	dwc_otg_hcd_complete_urb_cb_t (dwc_otg_hcd_t hcd, void urb_handle, dwc_otg_hcd_urb_t *dwc_otg_urb, int32_t status)
	This function is called when urb is completed.
typedef int(*)	dwc_otg_hcd_get_b_hnp_enable (dwc_otg_hcd_t *hcd)
	Via this function HCD core gets b_hnp_enable parameter.
Typedefs
typedef dwc_otg_hcd	dwc_otg_hcd_t
typedef dwc_otg_hcd_urb	dwc_otg_hcd_urb_t