asl.c File Reference

#include <linux/kernel.h>
#include <linux/gfp.h>
#include <linux/dma-mapping.h>
#include <linux/uwb/umc.h>
#include <linux/usb.h>
#include "../../wusbcore/wusbhc.h"
#include "whcd.h"

Go to the source code of this file.

Functions
void	asl_start (struct whc *whc)
void	asl_stop (struct whc *whc)
void	asl_update (struct whc *whc, uint32_t wusbcmd)
void	scan_async_work (struct work_struct *work)
int	asl_urb_enqueue (struct whc *whc, struct urb *urb, gfp_t mem_flags)
int	asl_urb_dequeue (struct whc *whc, struct urb *urb, int status)
void	asl_qset_delete (struct whc *whc, struct whc_qset *qset)
int	asl_init (struct whc *whc)
void	asl_clean_up (struct whc *whc)

Function Documentation

void asl_clean_up

(

struct whc *

whc

)

asl_clean_up - free ASL resources

The ASL is stopped and empty except for the dummy qset.

Definition at line 380 of file asl.c.

int asl_init

(

struct whc *

whc

)

asl_init - initialize the asynchronous schedule list

A dummy qset with no qTDs is added to the ASL to simplify removing qsets (no need to stop the ASL when the last qset is removed).

Definition at line 361 of file asl.c.

void asl_qset_delete	(	struct whc *	whc,
		struct whc_qset *	qset
	)

asl_qset_delete - delete a qset from the ASL

Definition at line 348 of file asl.c.

void asl_start

(

struct whc *

whc

)

Definition at line 145 of file asl.c.

void asl_stop

(

struct whc *

whc

)

Definition at line 159 of file asl.c.

void asl_update	(	struct whc *	whc,
		uint32_t	wusbcmd
	)

asl_update - request an ASL update and wait for the hardware to be synced : the WHCI HC : WUSBCMD value to start the update.

If the WUSB HC is inactive (i.e., the ASL is stopped) then the update must be skipped as the hardware may not respond to update requests.

Definition at line 176 of file asl.c.

int asl_urb_dequeue	(	struct whc *	whc,
		struct urb *	urb,
		int	status
	)

asl_urb_dequeue - remove an URB (qset) from the async list. : the WHCI host controller : the URB to dequeue : the current status of the URB

URBs that do yet have qTDs can simply be removed from the software queue, otherwise the qset must be removed from the ASL so the qTDs can be removed.

Definition at line 308 of file asl.c.

int asl_urb_enqueue	(	struct whc *	whc,
		struct urb *	urb,
		gfp_t	mem_flags
	)

asl_urb_enqueue - queue an URB onto the asynchronous list (ASL). : the WHCI host controller : the URB to enqueue : flags for any memory allocations

The qset for the endpoint is obtained and the urb queued on to it.

Work is scheduled to update the hardware's view of the ASL.

Definition at line 265 of file asl.c.

void scan_async_work

(

struct work_struct *

work

)

scan_async_work - scan the ASL for qsets to process.

Process each qset in the ASL in turn and then signal the WHC that the ASL has been updated.

Then start, stop or update the asynchronous schedule as required.

Definition at line 202 of file asl.c.