drivers/media/usb/gspca/spca561.c

Source file repositories/reference/linux-study-clean/drivers/media/usb/gspca/spca561.c

File Facts

System
Linux kernel
Corpus path
drivers/media/usb/gspca/spca561.c
Extension
.c
Size
25226 bytes
Lines
912
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct sd {
	struct gspca_dev gspca_dev;	/* !! must be the first item */

	struct { /* hue/contrast control cluster */
		struct v4l2_ctrl *contrast;
		struct v4l2_ctrl *hue;
	};
	struct v4l2_ctrl *autogain;

#define EXPO12A_DEF 3
	__u8 expo12a;		/* expo/gain? for rev 12a */

	__u8 chip_revision;
#define Rev012A 0
#define Rev072A 1

	signed char ag_cnt;
#define AG_CNT_START 13
};

static const struct v4l2_pix_format sif_012a_mode[] = {
	{160, 120, V4L2_PIX_FMT_SGBRG8, V4L2_FIELD_NONE,
		.bytesperline = 160,
		.sizeimage = 160 * 120,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 3},
	{176, 144, V4L2_PIX_FMT_SGBRG8, V4L2_FIELD_NONE,
		.bytesperline = 176,
		.sizeimage = 176 * 144,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 2},
	{320, 240, V4L2_PIX_FMT_SPCA561, V4L2_FIELD_NONE,
		.bytesperline = 320,
		.sizeimage = 320 * 240 * 4 / 8,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 1},
	{352, 288, V4L2_PIX_FMT_SPCA561, V4L2_FIELD_NONE,
		.bytesperline = 352,
		.sizeimage = 352 * 288 * 4 / 8,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0},
};

static const struct v4l2_pix_format sif_072a_mode[] = {
	{160, 120, V4L2_PIX_FMT_SGBRG8, V4L2_FIELD_NONE,
		.bytesperline = 160,
		.sizeimage = 160 * 120,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 3},
	{176, 144, V4L2_PIX_FMT_SGBRG8, V4L2_FIELD_NONE,
		.bytesperline = 176,
		.sizeimage = 176 * 144,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 2},
	{320, 240, V4L2_PIX_FMT_SGBRG8, V4L2_FIELD_NONE,
		.bytesperline = 320,
		.sizeimage = 320 * 240,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 1},
	{352, 288, V4L2_PIX_FMT_SGBRG8, V4L2_FIELD_NONE,
		.bytesperline = 352,
		.sizeimage = 352 * 288,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0},
};

/*
 * Initialization data
 * I'm not very sure how to split initialization from open data
 * chunks. For now, we'll consider everything as initialization
 */
/* Frame packet header offsets for the spca561 */
#define SPCA561_OFFSET_SNAP 1
#define SPCA561_OFFSET_TYPE 2
#define SPCA561_OFFSET_COMPRESS 3
#define SPCA561_OFFSET_FRAMSEQ   4
#define SPCA561_OFFSET_GPIO 5
#define SPCA561_OFFSET_USBBUFF 6
#define SPCA561_OFFSET_WIN2GRAVE 7
#define SPCA561_OFFSET_WIN2RAVE 8
#define SPCA561_OFFSET_WIN2BAVE 9
#define SPCA561_OFFSET_WIN2GBAVE 10
#define SPCA561_OFFSET_WIN1GRAVE 11
#define SPCA561_OFFSET_WIN1RAVE 12
#define SPCA561_OFFSET_WIN1BAVE 13
#define SPCA561_OFFSET_WIN1GBAVE 14
#define SPCA561_OFFSET_FREQ 15
#define SPCA561_OFFSET_VSYNC 16
#define SPCA561_INDEX_I2C_BASE 0x8800
#define SPCA561_SNAPBIT 0x20

Annotation

Implementation Notes