drivers/media/usb/gspca/pac7311.c

Source file repositories/reference/linux-study-clean/drivers/media/usb/gspca/pac7311.c

File Facts

System
Linux kernel
Corpus path
drivers/media/usb/gspca/pac7311.c
Extension
.c
Size
19356 bytes
Lines
688
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 v4l2_ctrl *contrast;
	struct v4l2_ctrl *hflip;

	u8 sof_read;
	u8 autogain_ignore_frames;

	atomic_t avg_lum;
};

static const struct v4l2_pix_format vga_mode[] = {
	{160, 120, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE,
		.bytesperline = 160,
		.sizeimage = 160 * 120 * 3 / 8 + 590,
		.colorspace = V4L2_COLORSPACE_JPEG,
		.priv = 2},
	{320, 240, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE,
		.bytesperline = 320,
		.sizeimage = 320 * 240 * 3 / 8 + 590,
		.colorspace = V4L2_COLORSPACE_JPEG,
		.priv = 1},
	{640, 480, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE,
		.bytesperline = 640,
		.sizeimage = 640 * 480 * 3 / 8 + 590,
		.colorspace = V4L2_COLORSPACE_JPEG,
		.priv = 0},
};

#define LOAD_PAGE4		254
#define END_OF_SEQUENCE		0

static const __u8 init_7311[] = {
	0xff, 0x01,
	0x78, 0x40,	/* Bit_0=start stream, Bit_6=LED */
	0x78, 0x40,	/* Bit_0=start stream, Bit_6=LED */
	0x78, 0x44,	/* Bit_0=start stream, Bit_6=LED */
	0xff, 0x04,
	0x27, 0x80,
	0x28, 0xca,
	0x29, 0x53,
	0x2a, 0x0e,
	0xff, 0x01,
	0x3e, 0x20,
};

static const __u8 start_7311[] = {
/*	index, len, [value]* */
	0xff, 1,	0x01,		/* page 1 */
	0x02, 43,	0x48, 0x0a, 0x40, 0x08, 0x00, 0x00, 0x08, 0x00,
			0x06, 0xff, 0x11, 0xff, 0x5a, 0x30, 0x90, 0x4c,
			0x00, 0x07, 0x00, 0x0a, 0x10, 0x00, 0xa0, 0x10,
			0x02, 0x00, 0x00, 0x00, 0x00, 0x0b, 0x01, 0x00,
			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
			0x00, 0x00, 0x00,
	0x3e, 42,	0x00, 0x00, 0x78, 0x52, 0x4a, 0x52, 0x78, 0x6e,
			0x48, 0x46, 0x48, 0x6e, 0x5f, 0x49, 0x42, 0x49,
			0x5f, 0x5f, 0x49, 0x42, 0x49, 0x5f, 0x6e, 0x48,
			0x46, 0x48, 0x6e, 0x78, 0x52, 0x4a, 0x52, 0x78,
			0x00, 0x00, 0x09, 0x1b, 0x34, 0x49, 0x5c, 0x9b,
			0xd0, 0xff,
	0x78, 6,	0x44, 0x00, 0xf2, 0x01, 0x01, 0x80,
	0x7f, 18,	0x2a, 0x1c, 0x00, 0xc8, 0x02, 0x58, 0x03, 0x84,
			0x12, 0x00, 0x1a, 0x04, 0x08, 0x0c, 0x10, 0x14,
			0x18, 0x20,
	0x96, 3,	0x01, 0x08, 0x04,
	0xa0, 4,	0x44, 0x44, 0x44, 0x04,
	0xf0, 13,	0x01, 0x00, 0x00, 0x00, 0x22, 0x00, 0x20, 0x00,
			0x3f, 0x00, 0x0a, 0x01, 0x00,
	0xff, 1,	0x04,		/* page 4 */
	0, LOAD_PAGE4,			/* load the page 4 */
	0x11, 1,	0x01,
	0, END_OF_SEQUENCE		/* end of sequence */
};

#define SKIP		0xaa
/* page 4 - the value SKIP says skip the index - see reg_w_page() */
static const __u8 page4_7311[] = {
	SKIP, SKIP, 0x04, 0x54, 0x07, 0x2b, 0x09, 0x0f,
	0x09, 0x00, SKIP, SKIP, 0x07, 0x00, 0x00, 0x62,
	0x08, SKIP, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x03, 0xa0, 0x01, 0xf4, SKIP,
	SKIP, 0x00, 0x08, SKIP, 0x03, SKIP, 0x00, 0x68,
	0xca, 0x10, 0x06, 0x78, 0x00, 0x00, 0x00, 0x00,
	0x23, 0x28, 0x04, 0x11, 0x00, 0x00
};

static void reg_w_buf(struct gspca_dev *gspca_dev,
		  __u8 index,

Annotation

Implementation Notes