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/*

    planb - PlanB frame grabber driver

    PlanB is used in the 7x00/8x00 series of PowerMacintosh

    Computers as video input DMA controller.

    Copyright (C) 1998 Michel Lanners (mlan@cpu.lu)

    Based largely on the bttv driver by Ralph Metzler (rjkm@thp.uni-koeln.de)

    Additional debugging and coding by Takashi Oe (toe@unlserve.unl.edu)

    This program is free software; you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by

    the Free Software Foundation; either version 2 of the License, or

    (at your option) any later version.

    This program is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License

    along with this program; if not, write to the Free Software

    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

/* $Id: planb.h,v 1.13 1999/05/03 19:28:56 mlan Exp $ */

#ifndef _PLANB_H_

#define _PLANB_H_

#ifdef __KERNEL__

#include <asm/dbdma.h>

#include "saa7196.h"

#endif /* __KERNEL__ */

#define PLANB_DEVICE_NAME       "Apple PlanB Video-In"

#define PLANB_REV               "1.0"

#ifdef __KERNEL__

//#define PLANB_GSCANLINE       /* use this if apps have the notion of */

                                /* grab buffer scanline */

/* This should be safe for both PAL and NTSC */

#define PLANB_MAXPIXELS 768

#define PLANB_MAXLINES 576

#define PLANB_NTSC_MAXLINES 480

/* Uncomment your preferred norm ;-) */

#define PLANB_DEF_NORM VIDEO_MODE_PAL

//#define PLANB_DEF_NORM VIDEO_MODE_NTSC

//#define PLANB_DEF_NORM VIDEO_MODE_SECAM

/* fields settings */

#define PLANB_GRAY      0x1     /*  8-bit mono? */

#define PLANB_COLOUR15  0x2     /* 16-bit mode */

#define PLANB_COLOUR32  0x4     /* 32-bit mode */

#define PLANB_CLIPMASK  0x8     /* hardware clipmasking */

/* misc. flags for PlanB DMA operation */

#define CH_SYNC         0x1     /* synchronize channels (set by ch1;

                                   cleared by ch2) */

#define FIELD_SYNC      0x2     /* used for the start of each field

                                   (0 -> 1 -> 0 for ch1; 0 -> 1 for ch2) */

#define EVEN_FIELD      0x0     /* even field is detected if unset */

#define DMA_ABORT       0x2     /* error or just out of sync if set */

#define ODD_FIELD       0x4     /* odd field is detected if set */

/* for capture operations */

#define MAX_GBUFFERS    2

/* note PLANB_MAX_FBUF must be divisible by PAGE_SIZE */

#ifdef PLANB_GSCANLINE

#define PLANB_MAX_FBUF  0x240000        /* 576 * 1024 * 4 */

#define TAB_FACTOR      (1)

#else

#define PLANB_MAX_FBUF  0x1b0000        /* 576 * 768 * 4 */

#define TAB_FACTOR      (2)

#endif

#endif /* __KERNEL__ */

struct planb_saa_regs {

        unsigned char addr;

        unsigned char val;

};

struct planb_stat_regs {

        unsigned int ch1_stat;

        unsigned int ch2_stat;

        unsigned char saa_stat0;

        unsigned char saa_stat1;

};

struct planb_any_regs {

        unsigned int offset;

        unsigned int bytes;

        unsigned char data[128];

};

/* planb private ioctls */

#define PLANBIOCGSAAREGS        _IOWR('v', BASE_VIDIOCPRIVATE, struct planb_saa_regs)   /* Read a saa7196 reg value */

#define PLANBIOCSSAAREGS        _IOW('v', BASE_VIDIOCPRIVATE + 1, struct planb_saa_regs)        /* Set a saa7196 reg value */

#define PLANBIOCGSTAT           _IOR('v', BASE_VIDIOCPRIVATE + 2, struct planb_stat_regs)       /* Read planb status */

#define PLANB_TV_MODE           1

#define PLANB_VTR_MODE          2

#define PLANBIOCGMODE           _IOR('v', BASE_VIDIOCPRIVATE + 3, int)  /* Get TV/VTR mode */

#define PLANBIOCSMODE           _IOW('v', BASE_VIDIOCPRIVATE + 4, int)  /* Set TV/VTR mode */

#ifdef PLANB_GSCANLINE

#define PLANBG_GRAB_BPL         _IOR('v', BASE_VIDIOCPRIVATE + 5, int)  /* # of bytes per scanline in grab buffer */

#endif

/* call wake_up_interruptible() with appropriate actions */

#define PLANB_INTR_DEBUG        _IOW('v', BASE_VIDIOCPRIVATE + 20, int)

/* investigate which reg does what */

#define PLANB_INV_REGS          _IOWR('v', BASE_VIDIOCPRIVATE + 21, struct planb_any_regs)

#ifdef __KERNEL__

/* Potentially useful macros */

#define PLANB_SET(x)    ((x) << 16 | (x))

#define PLANB_CLR(x)    ((x) << 16)

/* This represents the physical register layout */

struct planb_registers {

        volatile struct dbdma_regs      ch1;            /* 0x00: video in */

        volatile unsigned int           even;           /* 0x40: even field setting */

        volatile unsigned int           odd;            /* 0x44; odd field setting */

        unsigned int                    pad1[14];       /* empty? */

        volatile struct dbdma_regs      ch2;            /* 0x80: clipmask out */

        unsigned int                    pad2[16];       /* 0xc0: empty? */

        volatile unsigned int           reg3;           /* 0x100: ???? */

        volatile unsigned int           intr_stat;      /* 0x104: irq status */

#define PLANB_CLR_IRQ           0x00            /* clear Plan B interrupt */

#define PLANB_GEN_IRQ           0x01            /* assert Plan B interrupt */

#define PLANB_FRM_IRQ           0x0100          /* end of frame */

        unsigned int                    pad3[1];        /* empty? */

        volatile unsigned int           reg5;           /* 0x10c: ??? */

        unsigned int                    pad4[60];       /* empty? */

        volatile unsigned char          saa_addr;       /* 0x200: SAA subadr */

        char                            pad5[3];

        volatile unsigned char          saa_regval;     /* SAA7196 write reg. val */

        char                            pad6[3];

        volatile unsigned char          saa_status;     /* SAA7196 status byte */

        /* There is more unused stuff here */

};

struct planb_window {

        int     x, y;

        ushort  width, height;

        ushort  bpp, bpl, depth, pad;

        ushort  swidth, sheight;

        int     norm;

        int     interlace;

        u32     color_fmt;

        int     chromakey;

        int     mode;           /* used to switch between TV/VTR modes */

};

struct planb_suspend {

        int overlay;

        int frame;

        struct dbdma_cmd cmd;

};

struct planb {

        struct  video_device video_dev;

        struct  video_picture picture;          /* Current picture params */

        struct  video_audio audio_dev;          /* Current audio params */

        volatile struct planb_registers *planb_base;    /* virt base of planb */

        struct planb_registers *planb_base_phys;        /* phys base of planb */

        void    *priv_space;                    /* Org. alloc. mem for kfree */

        int     user;

        unsigned int tab_size;

        int     maxlines;

        struct mutex lock;

        unsigned int    irq;                    /* interrupt number */

        volatile unsigned int intr_mask;

        struct pci_dev *dev;                    /* Our PCI device */

        int     overlay;                        /* overlay running? */

        struct  planb_window win;

        unsigned long frame_buffer_phys;        /* We need phys for DMA */

        int     offset;                         /* offset of pixel 1 */

        volatile struct dbdma_cmd *ch1_cmd;     /* Video In DMA cmd buffer */

        volatile struct dbdma_cmd *ch2_cmd;     /* Clip Out DMA cmd buffer */

        volatile struct dbdma_cmd *overlay_last1;

        volatile struct dbdma_cmd *overlay_last2;

        unsigned long ch1_cmd_phys;

        volatile unsigned char *mask;           /* Clipmask buffer */

        int suspend;

        wait_queue_head_t suspendq;

        struct planb_suspend suspended;

        int     cmd_buff_inited;                /* cmd buffer inited? */

        int grabbing;

        unsigned int gcount;

        wait_queue_head_t capq;

        int last_fr;

        int prev_last_fr;

        unsigned char **rawbuf;

        int rawbuf_size;

        int gbuf_idx[MAX_GBUFFERS];

        volatile struct dbdma_cmd *cap_cmd[MAX_GBUFFERS];

        volatile struct dbdma_cmd *last_cmd[MAX_GBUFFERS];

        volatile struct dbdma_cmd *pre_cmd[MAX_GBUFFERS];

        int need_pre_capture[MAX_GBUFFERS];

#define PLANB_DUMMY 40  /* # of command buf's allocated for pre-capture seq. */

        int gwidth[MAX_GBUFFERS], gheight[MAX_GBUFFERS];

        unsigned int gfmt[MAX_GBUFFERS];

        int gnorm_switch[MAX_GBUFFERS];

        volatile unsigned int *frame_stat;

#define GBUFFER_UNUSED       0x00U

#define GBUFFER_GRABBING     0x01U

#define GBUFFER_DONE         0x02U

#ifdef PLANB_GSCANLINE

        int gbytes_per_line;

#else

#define MAX_LNUM 431    /* change this if PLANB_MAXLINES or */

                        /* PLANB_MAXPIXELS changes */

        int l_fr_addr_idx[MAX_GBUFFERS];

        unsigned char *l_to_addr[MAX_GBUFFERS][MAX_LNUM];

        int l_to_next_idx[MAX_GBUFFERS][MAX_LNUM];

        int l_to_next_size[MAX_GBUFFERS][MAX_LNUM];

        int lsize[MAX_GBUFFERS], lnum[MAX_GBUFFERS];

#endif

};

#endif /* __KERNEL__ */

#endif /* _PLANB_H_ */