zoran.h

底层驱动开发

/* v4l-capture settings */
struct zoran_v4l_settings {
	int width, height, bytesperline;	/* capture size */
	const struct zoran_format *format;	/* capture format */
};

/* whoops, this one is undeclared if !v4l2 */
#ifndef HAVE_V4L2
struct v4l2_jpegcompression {
	int quality;
	int APPn;
	int APP_len;
	char APP_data[60];
	int COM_len;
	char COM_data[60];
	__u32 jpeg_markers;
	__u8 reserved[116];
};
#endif

/* jpg-capture/-playback settings */
struct zoran_jpg_settings {
	int decimation;		/* this bit is used to set everything to default */
	int HorDcm, VerDcm, TmpDcm;	/* capture decimation settings (TmpDcm=1 means both fields) */
	int field_per_buff, odd_even;	/* field-settings (odd_even=1 (+TmpDcm=1) means top-field-first) */
	int img_x, img_y, img_width, img_height;	/* crop settings (subframe capture) */
	struct v4l2_jpegcompression jpg_comp;	/* JPEG-specific capture settings */
};

struct zoran_mapping {
	struct file *file;
	int count;
};

struct zoran_jpg_buffer {
	struct zoran_mapping *map;
	u32 *frag_tab;		/* addresses of frag table */
	u32 frag_tab_bus;	/* same value cached to save time in ISR */
	enum zoran_buffer_state state;	/* non-zero if corresponding buffer is in use in grab queue */
	struct zoran_sync bs;	/* DONE: info to return to application */
};

struct zoran_v4l_buffer {
	struct zoran_mapping *map;
	char *fbuffer;		/* virtual  address of frame buffer */
	unsigned long fbuffer_phys;	/* physical address of frame buffer */
	unsigned long fbuffer_bus;	/* bus      address of frame buffer */
	enum zoran_buffer_state state;	/* state: unused/pending/done */
	struct zoran_sync bs;	/* DONE: info to return to application */
};

enum zoran_lock_activity {
	ZORAN_FREE,		/* free for use */
	ZORAN_ACTIVE,		/* active but unlocked */
	ZORAN_LOCKED,		/* locked */
};

/* buffer collections */
struct zoran_jpg_struct {
	enum zoran_lock_activity active;	/* feature currently in use? */
	struct zoran_jpg_buffer buffer[BUZ_MAX_FRAME];	/* buffers */
	int num_buffers, buffer_size;
	u8 allocated;		/* Flag if buffers are allocated  */
	u8 ready_to_be_freed;	/* hack - see zoran_driver.c */
	u8 need_contiguous;	/* Flag if contiguous buffers are needed */
};

struct zoran_v4l_struct {
	enum zoran_lock_activity active;	/* feature currently in use? */
	struct zoran_v4l_buffer buffer[VIDEO_MAX_FRAME];	/* buffers */
	int num_buffers, buffer_size;
	u8 allocated;		/* Flag if buffers are allocated  */
	u8 ready_to_be_freed;	/* hack - see zoran_driver.c */
};

struct zoran;

/* zoran_fh contains per-open() settings */
struct zoran_fh {
	struct zoran *zr;

	enum zoran_map_mode map_mode;	/* Flag which bufferset will map by next mmap() */

	struct zoran_overlay_settings overlay_settings;
	u32 *overlay_mask;	/* overlay mask */
	enum zoran_lock_activity overlay_active;	/* feature currently in use? */

	struct zoran_v4l_settings v4l_settings;	/* structure with a lot of things to play with */
	struct zoran_v4l_struct v4l_buffers;	/* V4L buffers' info */

	struct zoran_jpg_settings jpg_settings;	/* structure with a lot of things to play with */
	struct zoran_jpg_struct jpg_buffers;	/* MJPEG buffers' info */
};

struct card_info {
	enum card_type type;
	char name[32];
	u16 i2c_decoder, i2c_encoder;			/* I2C types */
	u16 video_vfe, video_codec;			/* videocodec types */
	u16 audio_chip;					/* audio type */
	u16 vendor_id, device_id;	/* subsystem vendor/device ID */

	int inputs;		/* number of video inputs */
	struct input {
		int muxsel;
		char name[32];
	} input[BUZ_MAX_INPUT];

	int norms;
	struct tvnorm *tvn[3];	/* supported TV norms */

	u32 jpeg_int;		/* JPEG interrupt */
	u32 vsync_int;		/* VSYNC interrupt */
	s8 gpio[GPIO_MAX];
	u8 gpcs[GPCS_MAX];

	struct vfe_polarity vfe_pol;
	u8 gpio_pol[GPIO_MAX];

	/* is the /GWS line conected? */
	u8 gws_not_connected;

	void (*init) (struct zoran * zr);
};

struct zoran {
	struct video_device *video_dev;

	struct i2c_adapter i2c_adapter;	/* */
	struct i2c_algo_bit_data i2c_algo;	/* */
	u32 i2cbr;

	struct i2c_client *decoder;	/* video decoder i2c client */
	struct i2c_client *encoder;	/* video encoder i2c client */

	struct videocodec *codec;	/* video codec */
	struct videocodec *vfe;	/* video front end */

	struct semaphore resource_lock;	/* prevent evil stuff */

	u8 initialized;		/* flag if zoran has been correctly initalized */
	int user;		/* number of current users */
	struct card_info card;
	struct tvnorm *timing;

	unsigned short id;	/* number of this device */
	char name[32];		/* name of this device */
	struct pci_dev *pci_dev;	/* PCI device */
	unsigned char revision;	/* revision of zr36057 */
	unsigned int zr36057_adr;	/* bus address of IO mem returned by PCI BIOS */
	unsigned char __iomem *zr36057_mem;/* pointer to mapped IO memory */

	spinlock_t spinlock;	/* Spinlock */

	/* Video for Linux parameters */
	int input, norm;	/* card's norm and input - norm=VIDEO_MODE_* */
	int hue, saturation, contrast, brightness;	/* Current picture params */
	struct video_buffer buffer;	/* Current buffer params */
	struct zoran_overlay_settings overlay_settings;
	u32 *overlay_mask;	/* overlay mask */
	enum zoran_lock_activity overlay_active;	/* feature currently in use? */

	wait_queue_head_t v4l_capq;

	int v4l_overlay_active;	/* Overlay grab is activated */
	int v4l_memgrab_active;	/* Memory grab is activated */

	int v4l_grab_frame;	/* Frame number being currently grabbed */
#define NO_GRAB_ACTIVE (-1)
	unsigned long v4l_grab_seq;	/* Number of frames grabbed */
	struct zoran_v4l_settings v4l_settings;	/* structure with a lot of things to play with */

	/* V4L grab queue of frames pending */
	unsigned long v4l_pend_head;
	unsigned long v4l_pend_tail;
	unsigned long v4l_sync_tail;
	int v4l_pend[V4L_MAX_FRAME];
	struct zoran_v4l_struct v4l_buffers;	/* V4L buffers' info */

	/* Buz MJPEG parameters */
	enum zoran_codec_mode codec_mode;	/* status of codec */
	struct zoran_jpg_settings jpg_settings;	/* structure with a lot of things to play with */

	wait_queue_head_t jpg_capq;	/* wait here for grab to finish */

	/* grab queue counts/indices, mask with BUZ_MASK_STAT_COM before using as index */
	/* (dma_head - dma_tail) is number active in DMA, must be <= BUZ_NUM_STAT_COM */
	/* (value & BUZ_MASK_STAT_COM) corresponds to index in stat_com table */
	unsigned long jpg_que_head;	/* Index where to put next buffer which is queued */
	unsigned long jpg_dma_head;	/* Index of next buffer which goes into stat_com  */
	unsigned long jpg_dma_tail;	/* Index of last buffer in stat_com               */
	unsigned long jpg_que_tail;	/* Index of last buffer in queue                  */
	unsigned long jpg_seq_num;	/* count of frames since grab/play started        */
	unsigned long jpg_err_seq;	/* last seq_num before error                      */
	unsigned long jpg_err_shift;
	unsigned long jpg_queued_num;	/* count of frames queued since grab/play started */

	/* zr36057's code buffer table */
	u32 *stat_com;		/* stat_com[i] is indexed by dma_head/tail & BUZ_MASK_STAT_COM */

	/* (value & BUZ_MASK_FRAME) corresponds to index in pend[] queue */
	int jpg_pend[BUZ_MAX_FRAME];

	/* array indexed by frame number */
	struct zoran_jpg_struct jpg_buffers;	/* MJPEG buffers' info */

	/* Additional stuff for testing */
#ifdef CONFIG_PROC_FS
	struct proc_dir_entry *zoran_proc;
#else
	void *zoran_proc;
#endif
	int testing;
	int jpeg_error;
	int intr_counter_GIRQ1;
	int intr_counter_GIRQ0;
	int intr_counter_CodRepIRQ;
	int intr_counter_JPEGRepIRQ;
	int field_counter;
	int IRQ1_in;
	int IRQ1_out;
	int JPEG_in;
	int JPEG_out;
	int JPEG_0;
	int JPEG_1;
	int END_event_missed;
	int JPEG_missed;
	int JPEG_error;
	int num_errors;
	int JPEG_max_missed;
	int JPEG_min_missed;

	u32 last_isr;
	unsigned long frame_num;

	wait_queue_head_t test_q;
};

/*The following should be done in more portable way. It depends on define
  of _ALPHA_BUZ in the Makefile.*/

#ifdef _ALPHA_BUZ
#define btwrite(dat,adr)    writel((dat), zr->zr36057_adr+(adr))
#define btread(adr)         readl(zr->zr36057_adr+(adr))
#else
#define btwrite(dat,adr)    writel((dat), zr->zr36057_mem+(adr))
#define btread(adr)         readl(zr->zr36057_mem+(adr))
#endif

#define btand(dat,adr)      btwrite((dat) & btread(adr), adr)
#define btor(dat,adr)       btwrite((dat) | btread(adr), adr)
#define btaor(dat,mask,adr) btwrite((dat) | ((mask) & btread(adr)), adr)

#endif				/* __kernel__ */

#endif