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Commit f2242ee5 authored by Thierry MERLE's avatar Thierry MERLE Committed by Mauro Carvalho Chehab
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V4L/DVB (4927): Enhancements on usbvision driver 



Enhance the buffer management of this driver + some corrections
- linux list.h usage for buffer management
- VIDIOC_ENUMSTD/VIDIOC_G_STD/VIDIOC_S_STD simplification (use of
v4l2_video_std_construct)
- create_sysfs : remove of warnings for video_device_create_file return code
- make the driver compatible with 2.6.19 kernel version (remove
slave_send and slave_recv in usbvision-i2c, change ctrlUrb_complete
function prototype)
- deactivated v4l2_read because this code was not the priority but
working on it :)

Signed-off-by: default avatarThierry MERLE <thierry.merle@free.fr>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent 18d8a454

drivers/media/video/usbvision/usbvision-core.c

+356 −295

File changed.

Preview size limit exceeded, changes collapsed.

drivers/media/video/usbvision/usbvision-i2c.c

+3 −5
Original line number Diff line number Diff line
@@ -205,8 +205,6 @@ static u32 usb_func(struct i2c_adapter *adap) 
static struct i2c_algorithm i2c_usb_algo = {

	.master_xfer   = usb_xfer,

	.smbus_xfer    = NULL,

	.slave_send    = NULL,

	.slave_recv    = NULL,

	.algo_control  = algo_control,

	.functionality = usb_func,

};

drivers/media/video/usbvision/usbvision.h

+59 −32
Original line number Diff line number Diff line
@@ -139,7 +139,7 @@ 
#define USBVISION_MAX_ISOC_PACKET_SIZE 	959			// NT1003 Specs Document says 1023



#define USBVISION_NUM_HEADERMARKER	20

#define USBVISION_NUMFRAMES		2

#define USBVISION_NUMFRAMES		3

#define USBVISION_NUMSBUF		2



#define USBVISION_POWEROFF_TIME		3 * (HZ)		// 3 seconds
@@ -225,6 +225,13 @@ enum FrameState { 
	FrameState_Error,	/* Something bad happened while processing */

};



/* stream states */

enum StreamState {

	Stream_Off,

	Stream_Interrupt,

	Stream_On,

};



enum IsocState {

	IsocState_InFrame,	/* Isoc packet is member of frame */

	IsocState_NoFrame,	/* Isoc packet is not member of any frame */
@@ -272,19 +279,29 @@ struct usbvision_frame_header { 
	__u16 frameHeight;				/* 10 - 11 after endian correction*/

};



/* tvnorms */

struct usbvision_tvnorm {

	char *name;

	v4l2_std_id id;

	/* mode for saa7113h */

	int mode;

};



struct usbvision_frame {

	char *data;					/* Frame buffer */

	struct usbvision_frame_header isocHeader;	/* Header from stream */



	int width;					/* Width application is expecting */

	int height;					/* Height */



	int index;					/* Frame index */

	int frmwidth;					/* Width the frame actually is */

	int frmheight;					/* Height */



	volatile int grabstate;				/* State of grabbing */

	int scanstate;					/* State of scanning */



	struct list_head frame;



	int curline;					/* Line of frame we're working on */



	long scanlength;				/* uncompressed, raw data length of frame */
@@ -292,7 +309,6 @@ struct usbvision_frame { 
	struct usbvision_v4l2_format_st v4l2_format;	/* format the user needs*/

	int v4l2_linesize;				/* bytes for one videoline*/

	struct timeval timestamp;

	wait_queue_head_t wq;				/* Processes waiting */

	int sequence;					// How many video frames we send to user

};
@@ -373,7 +389,7 @@ struct usb_usbvision { 
	int usbvision_used;						/* Is this structure in use? */

	int initialized;						/* Had we already sent init sequence? */

	int DevModel;							/* What type of USBVISION device we got? */

	int streaming;							/* Are we streaming Isochronous? */

	enum StreamState streaming;					/* Are we streaming Isochronous? */

	int last_error;							/* What calamity struck us? */

	int curwidth;							/* width of the frame the device is currently set to*/

	int curheight;      						/* height of the frame the device is currently set to*/
@@ -382,7 +398,10 @@ struct usb_usbvision { 
	char *fbuf;							/* Videodev buffer area for mmap*/

	int max_frame_size;						/* Bytes in one video frame */

	int fbuf_size;							/* Videodev buffer size */

	int curFrameNum;						// number of current frame in frame buffer mode

	spinlock_t queue_lock;						/* spinlock for protecting mods on inqueue and outqueue */

	struct list_head inqueue, outqueue;                             /* queued frame list and ready to dequeue frame list */

	wait_queue_head_t wait_frame;					/* Processes waiting */

	wait_queue_head_t wait_stream;					/* Processes waiting */

	struct usbvision_frame *curFrame;				// pointer to current frame, set by usbvision_find_header

	struct usbvision_frame frame[USBVISION_NUMFRAMES];		// frame buffer

	int curSbufNum;							// number of current receiving sbuf
@@ -406,7 +425,8 @@ struct usb_usbvision { 
	struct usbvision_v4l2_format_st palette;



	struct v4l2_capability vcap;					/* Video capabilities */

	struct v4l2_input input;					/* May be used for tuner support */

	unsigned int ctl_input;						/* selected input */

	struct usbvision_tvnorm *tvnorm;				/* selected tv norm */

	unsigned char video_endp;					/* 0x82 for USBVISION devices based */



	// Overlay stuff:
@@ -463,3 +483,10 @@ struct usb_usbvision { 


#endif									/* __LINUX_USBVISION_H */



/*

 * Overrides for Emacs so that we follow Linus's tabbing style.

 * ---------------------------------------------------------------------------

 * Local variables:

 * c-basic-offset: 8

 * End:

 */