drivers/media/usb/gspca/sonixb.c

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

File Facts

System
Linux kernel
Corpus path
drivers/media/usb/gspca/sonixb.c
Extension
.c
Size
44755 bytes
Lines
1470
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 *brightness;
	struct v4l2_ctrl *plfreq;

	atomic_t avg_lum;
	int prev_avg_lum;
	int exposure_knee;
	int header_read;
	u8 header[12]; /* Header without sof marker */

	unsigned char autogain_ignore_frames;
	unsigned char frames_to_drop;

	__u8 bridge;			/* Type of bridge */
#define BRIDGE_101 0
#define BRIDGE_102 0 /* We make no difference between 101 and 102 */
#define BRIDGE_103 1

	__u8 sensor;			/* Type of image sensor chip */
#define SENSOR_HV7131D 0
#define SENSOR_HV7131R 1
#define SENSOR_OV6650 2
#define SENSOR_OV7630 3
#define SENSOR_PAS106 4
#define SENSOR_PAS202 5
#define SENSOR_TAS5110C 6
#define SENSOR_TAS5110D 7
#define SENSOR_TAS5130CXX 8
	__u8 reg11;
};

typedef const __u8 sensor_init_t[8];

struct sensor_data {
	const __u8 *bridge_init;
	sensor_init_t *sensor_init;
	int sensor_init_size;
	int flags;
	__u8 sensor_addr;
};

/* sensor_data flags */
#define F_SIF		0x01	/* sif or vga */

/* priv field of struct v4l2_pix_format flags (do not use low nibble!) */
#define MODE_RAW 0x10		/* raw bayer mode */
#define MODE_REDUCED_SIF 0x20	/* vga mode (320x240 / 160x120) on sif cam */

#define COMP 0xc7		/* 0x87 //0x07 */
#define COMP1 0xc9		/* 0x89 //0x09 */

#define MCK_INIT 0x63
#define MCK_INIT1 0x20		/*fixme: Bayer - 0x50 for JPEG ??*/

#define SYS_CLK 0x04

#define SENS(bridge, sensor, _flags, _sensor_addr) \
{ \
	.bridge_init = bridge, \
	.sensor_init = sensor, \
	.sensor_init_size = sizeof(sensor), \
	.flags = _flags, .sensor_addr = _sensor_addr \
}

/* We calculate the autogain at the end of the transfer of a frame, at this
   moment a frame with the old settings is being captured and transmitted. So
   if we adjust the gain or exposure we must ignore at least the next frame for
   the new settings to come into effect before doing any other adjustments. */
#define AUTOGAIN_IGNORE_FRAMES 1

static const struct v4l2_pix_format vga_mode[] = {
	{160, 120, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
		.bytesperline = 160,
		.sizeimage = 160 * 120,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 2 | MODE_RAW},
	{160, 120, V4L2_PIX_FMT_SN9C10X, V4L2_FIELD_NONE,
		.bytesperline = 160,
		.sizeimage = 160 * 120 * 5 / 4,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 2},
	{320, 240, V4L2_PIX_FMT_SN9C10X, V4L2_FIELD_NONE,
		.bytesperline = 320,
		.sizeimage = 320 * 240 * 5 / 4,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 1},
	{640, 480, V4L2_PIX_FMT_SN9C10X, V4L2_FIELD_NONE,
		.bytesperline = 640,

Annotation

Implementation Notes