V4L/DVB (8152): Initial release of gspca with only one driver.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 178 insertions, 0 deletions

diff --git a/drivers/media/video/gspca/gspca.h b/drivers/media/video/gspca/gspca.h
new file mode 100644
index 000000000000..1394ab13f1f4
--- /dev/null
+++ b/drivers/media/video/gspca/gspca.h
@@ -0,0 +1,178 @@
+#ifndef GSPCAV2_H
+#define GSPCAV2_H
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/usb.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-common.h>
+#include <linux/mutex.h>
+
+#ifdef GSPCA_DEBUG
+/* GSPCA our debug messages */
+extern int gspca_debug;
+#define PDEBUG(level, fmt, args...) \
+	do {\
+		if (gspca_debug & (level)) \
+			printk(KERN_INFO MODULE_NAME ": " fmt "\n", ## args); \
+	} while (0)
+#define D_ERR  0x01
+#define D_PROBE 0x02
+#define D_CONF 0x04
+#define D_STREAM 0x08
+#define D_FRAM 0x10
+#define D_PACK 0x20
+#define D_USBI 0x40
+#define D_USBO 0x80
+#else
+#define PDEBUG(level, fmt, args...)
+#endif
+#undef err
+#define err(fmt, args...) \
+	do {\
+		printk(KERN_ERR MODULE_NAME ": " fmt "\n", ## args); \
+	} while (0)
+#undef info
+#define info(fmt, args...) \
+	do {\
+		printk(KERN_INFO MODULE_NAME ": " fmt "\n", ## args); \
+	} while (0)
+#undef warn
+#define warn(fmt, args...) \
+	do {\
+		printk(KERN_WARNING MODULE_NAME ": " fmt "\n", ## args); \
+	} while (0)
+
+#define GSPCA_MAX_FRAMES 16	/* maximum number of video frame buffers */
+/* ISOC transfers */
+#define NURBS 4			/* number of URBs */
+#define ISO_MAX_PKT 32		/* max number of packets in an ISOC transfer */
+#define ISO_MAX_SIZE 0x10000	/* max size of one URB buffer (64 Kb) */
+
+/* device information - set at probe time */
+struct cam_mode {
+	__u32 pixfmt;
+	short width;
+	short height;
+	short mode;		/* subdriver value */
+	short reserved;		/* subdriver value */
+};
+struct cam {
+	char *dev_name;
+	struct cam_mode *cam_mode;	/* size nmodes */
+	char nmodes;
+	__u8 epaddr;
+};
+
+struct gspca_dev;
+struct gspca_frame;
+
+/* subdriver operations */
+typedef int (*cam_op) (struct gspca_dev *);
+typedef void (*cam_v_op) (struct gspca_dev *);
+typedef int (*cam_cf_op) (struct gspca_dev *, const struct usb_device_id *);
+typedef int (*cam_jpg_op) (struct gspca_dev *,
+				struct v4l2_jpegcompression *);
+typedef int (*cam_qmnu_op) (struct gspca_dev *,
+			struct v4l2_querymenu *);
+typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev,
+				struct gspca_frame *frame,
+				unsigned char *data,
+				int len);
+
+struct ctrl {
+	struct v4l2_queryctrl qctrl;
+	int (*set)(struct gspca_dev *, __s32);
+	int (*get)(struct gspca_dev *, __s32 *);
+};
+
+/* subdriver description */
+struct sd_desc {
+/* information */
+	char *name;			/* sub-driver name */
+/* controls */
+	struct ctrl *ctrls;
+	int nctrls;
+/* operations */
+	cam_cf_op config;		/* called on probe */
+	cam_op open;			/* called on open */
+	cam_v_op start;			/* called on stream on */
+	cam_v_op stopN;			/* called on stream off - main alt */
+	cam_v_op stop0;			/* called on stream off - alt 0 */
+	cam_v_op close;			/* called on close */
+	cam_pkt_op pkt_scan;
+	cam_jpg_op get_jcomp;
+	cam_jpg_op set_jcomp;
+	cam_qmnu_op querymenu;
+};
+
+struct gspca_pktbuf {
+	char *data;
+	struct urb *urb;
+};
+
+/* packet types when moving from iso buf to frame buf */
+#define DISCARD_PACKET	0
+#define FIRST_PACKET	1
+#define INTER_PACKET	2
+#define LAST_PACKET	3
+
+struct gspca_frame {
+	unsigned char *data;		/* frame buffer */
+	unsigned char *data_end;	/* current end of frame while filling */
+	int vma_use_count;
+	struct v4l2_buffer v4l2_buf;
+};
+
+struct gspca_dev {
+	struct video_device vdev;		/* !! must be the first item */
+	struct usb_device *dev;
+
+	struct cam cam;				/* device information */
+	const struct sd_desc *sd_desc;		/* subdriver description */
+
+	struct gspca_pktbuf pktbuf[NURBS];
+
+	__u8 *frbuf;				/* buffer for nframes */
+	struct gspca_frame frame[GSPCA_MAX_FRAMES];
+	unsigned int frsz;			/* frame size */
+	char nframes;				/* number of frames */
+	char fr_i;				/* frame being filled */
+	char fr_q;				/* next frame to queue */
+	char fr_o;				/* next frame to dequeue */
+	signed char fr_queue[GSPCA_MAX_FRAMES];	/* frame queue */
+	char last_packet_type;
+
+	__u8 iface;			/* USB interface number */
+	__u8 alt;			/* USB alternate setting */
+	char curr_mode;			/* current camera mode */
+	__u32 pixfmt;			/* current mode parameters */
+	short width;
+	short height;
+
+	atomic_t nevent;		/* number of frames done */
+	wait_queue_head_t wq;		/* wait queue */
+	struct mutex usb_lock;		/* usb exchange protection */
+	struct mutex read_lock;		/* read protection */
+	struct mutex queue_lock;	/* ISOC queue protection */
+	__u32 sequence;			/* frame sequence number */
+	signed char streaming;
+	char users;			/* # open */
+	char present;			/* device connected */
+	char nbufread;			/* number of buffers for read() */
+};
+
+int gspca_dev_probe(struct usb_interface *intf,
+		const struct usb_device_id *id,
+		const struct sd_desc *sd_desc,
+		int dev_size);
+int gspca_dev_init(struct gspca_dev *gspca_dev,
+		   struct usb_interface *intf);
+void gspca_disconnect(struct usb_interface *intf);
+struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev,
+				    int packet_type,
+				    struct gspca_frame *frame,
+				    unsigned char *data,
+				    int len);
+#endif /* GSPCAV2_H */