232 lines
7.5 KiB
C
232 lines
7.5 KiB
C
/*
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planb - PlanB frame grabber driver
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PlanB is used in the 7x00/8x00 series of PowerMacintosh
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Computers as video input DMA controller.
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Copyright (C) 1998 Michel Lanners (mlan@cpu.lu)
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Based largely on the bttv driver by Ralph Metzler (rjkm@thp.uni-koeln.de)
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Additional debugging and coding by Takashi Oe (toe@unlserve.unl.edu)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* $Id: planb.h,v 1.13 1999/05/03 19:28:56 mlan Exp $ */
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#ifndef _PLANB_H_
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#define _PLANB_H_
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#ifdef __KERNEL__
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#include <asm/dbdma.h>
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#include "saa7196.h"
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#endif /* __KERNEL__ */
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#define PLANB_DEVICE_NAME "Apple PlanB Video-In"
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#define PLANB_REV "1.0"
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#ifdef __KERNEL__
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//#define PLANB_GSCANLINE /* use this if apps have the notion of */
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/* grab buffer scanline */
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/* This should be safe for both PAL and NTSC */
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#define PLANB_MAXPIXELS 768
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#define PLANB_MAXLINES 576
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#define PLANB_NTSC_MAXLINES 480
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/* Uncomment your preferred norm ;-) */
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#define PLANB_DEF_NORM VIDEO_MODE_PAL
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//#define PLANB_DEF_NORM VIDEO_MODE_NTSC
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//#define PLANB_DEF_NORM VIDEO_MODE_SECAM
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/* fields settings */
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#define PLANB_GRAY 0x1 /* 8-bit mono? */
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#define PLANB_COLOUR15 0x2 /* 16-bit mode */
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#define PLANB_COLOUR32 0x4 /* 32-bit mode */
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#define PLANB_CLIPMASK 0x8 /* hardware clipmasking */
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/* misc. flags for PlanB DMA operation */
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#define CH_SYNC 0x1 /* synchronize channels (set by ch1;
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cleared by ch2) */
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#define FIELD_SYNC 0x2 /* used for the start of each field
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(0 -> 1 -> 0 for ch1; 0 -> 1 for ch2) */
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#define EVEN_FIELD 0x0 /* even field is detected if unset */
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#define DMA_ABORT 0x2 /* error or just out of sync if set */
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#define ODD_FIELD 0x4 /* odd field is detected if set */
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/* for capture operations */
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#define MAX_GBUFFERS 2
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/* note PLANB_MAX_FBUF must be divisible by PAGE_SIZE */
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#ifdef PLANB_GSCANLINE
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#define PLANB_MAX_FBUF 0x240000 /* 576 * 1024 * 4 */
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#define TAB_FACTOR (1)
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#else
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#define PLANB_MAX_FBUF 0x1b0000 /* 576 * 768 * 4 */
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#define TAB_FACTOR (2)
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#endif
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#endif /* __KERNEL__ */
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struct planb_saa_regs {
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unsigned char addr;
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unsigned char val;
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};
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struct planb_stat_regs {
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unsigned int ch1_stat;
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unsigned int ch2_stat;
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unsigned char saa_stat0;
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unsigned char saa_stat1;
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};
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struct planb_any_regs {
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unsigned int offset;
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unsigned int bytes;
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unsigned char data[128];
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};
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/* planb private ioctls */
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#define PLANBIOCGSAAREGS _IOWR('v', BASE_VIDIOCPRIVATE, struct planb_saa_regs) /* Read a saa7196 reg value */
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#define PLANBIOCSSAAREGS _IOW('v', BASE_VIDIOCPRIVATE + 1, struct planb_saa_regs) /* Set a saa7196 reg value */
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#define PLANBIOCGSTAT _IOR('v', BASE_VIDIOCPRIVATE + 2, struct planb_stat_regs) /* Read planb status */
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#define PLANB_TV_MODE 1
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#define PLANB_VTR_MODE 2
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#define PLANBIOCGMODE _IOR('v', BASE_VIDIOCPRIVATE + 3, int) /* Get TV/VTR mode */
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#define PLANBIOCSMODE _IOW('v', BASE_VIDIOCPRIVATE + 4, int) /* Set TV/VTR mode */
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#ifdef PLANB_GSCANLINE
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#define PLANBG_GRAB_BPL _IOR('v', BASE_VIDIOCPRIVATE + 5, int) /* # of bytes per scanline in grab buffer */
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#endif
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/* call wake_up_interruptible() with appropriate actions */
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#define PLANB_INTR_DEBUG _IOW('v', BASE_VIDIOCPRIVATE + 20, int)
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/* investigate which reg does what */
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#define PLANB_INV_REGS _IOWR('v', BASE_VIDIOCPRIVATE + 21, struct planb_any_regs)
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#ifdef __KERNEL__
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/* Potentially useful macros */
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#define PLANB_SET(x) ((x) << 16 | (x))
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#define PLANB_CLR(x) ((x) << 16)
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/* This represents the physical register layout */
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struct planb_registers {
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volatile struct dbdma_regs ch1; /* 0x00: video in */
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volatile unsigned int even; /* 0x40: even field setting */
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volatile unsigned int odd; /* 0x44; odd field setting */
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unsigned int pad1[14]; /* empty? */
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volatile struct dbdma_regs ch2; /* 0x80: clipmask out */
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unsigned int pad2[16]; /* 0xc0: empty? */
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volatile unsigned int reg3; /* 0x100: ???? */
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volatile unsigned int intr_stat; /* 0x104: irq status */
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#define PLANB_CLR_IRQ 0x00 /* clear Plan B interrupt */
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#define PLANB_GEN_IRQ 0x01 /* assert Plan B interrupt */
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#define PLANB_FRM_IRQ 0x0100 /* end of frame */
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unsigned int pad3[1]; /* empty? */
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volatile unsigned int reg5; /* 0x10c: ??? */
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unsigned int pad4[60]; /* empty? */
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volatile unsigned char saa_addr; /* 0x200: SAA subadr */
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char pad5[3];
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volatile unsigned char saa_regval; /* SAA7196 write reg. val */
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char pad6[3];
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volatile unsigned char saa_status; /* SAA7196 status byte */
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/* There is more unused stuff here */
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};
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struct planb_window {
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int x, y;
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ushort width, height;
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ushort bpp, bpl, depth, pad;
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ushort swidth, sheight;
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int norm;
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int interlace;
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u32 color_fmt;
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int chromakey;
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int mode; /* used to switch between TV/VTR modes */
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};
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struct planb_suspend {
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int overlay;
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int frame;
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struct dbdma_cmd cmd;
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};
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struct planb {
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struct video_device video_dev;
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struct video_picture picture; /* Current picture params */
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struct video_audio audio_dev; /* Current audio params */
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volatile struct planb_registers *planb_base; /* virt base of planb */
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struct planb_registers *planb_base_phys; /* phys base of planb */
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void *priv_space; /* Org. alloc. mem for kfree */
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int user;
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unsigned int tab_size;
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int maxlines;
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struct mutex lock;
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unsigned int irq; /* interrupt number */
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volatile unsigned int intr_mask;
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int overlay; /* overlay running? */
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struct planb_window win;
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unsigned long frame_buffer_phys; /* We need phys for DMA */
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int offset; /* offset of pixel 1 */
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volatile struct dbdma_cmd *ch1_cmd; /* Video In DMA cmd buffer */
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volatile struct dbdma_cmd *ch2_cmd; /* Clip Out DMA cmd buffer */
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volatile struct dbdma_cmd *overlay_last1;
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volatile struct dbdma_cmd *overlay_last2;
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unsigned long ch1_cmd_phys;
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volatile unsigned char *mask; /* Clipmask buffer */
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int suspend;
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wait_queue_head_t suspendq;
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struct planb_suspend suspended;
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int cmd_buff_inited; /* cmd buffer inited? */
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int grabbing;
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unsigned int gcount;
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wait_queue_head_t capq;
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int last_fr;
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int prev_last_fr;
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unsigned char **rawbuf;
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int rawbuf_size;
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int gbuf_idx[MAX_GBUFFERS];
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volatile struct dbdma_cmd *cap_cmd[MAX_GBUFFERS];
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volatile struct dbdma_cmd *last_cmd[MAX_GBUFFERS];
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volatile struct dbdma_cmd *pre_cmd[MAX_GBUFFERS];
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int need_pre_capture[MAX_GBUFFERS];
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#define PLANB_DUMMY 40 /* # of command buf's allocated for pre-capture seq. */
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int gwidth[MAX_GBUFFERS], gheight[MAX_GBUFFERS];
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unsigned int gfmt[MAX_GBUFFERS];
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int gnorm_switch[MAX_GBUFFERS];
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volatile unsigned int *frame_stat;
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#define GBUFFER_UNUSED 0x00U
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#define GBUFFER_GRABBING 0x01U
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#define GBUFFER_DONE 0x02U
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#ifdef PLANB_GSCANLINE
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int gbytes_per_line;
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#else
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#define MAX_LNUM 431 /* change this if PLANB_MAXLINES or */
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/* PLANB_MAXPIXELS changes */
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int l_fr_addr_idx[MAX_GBUFFERS];
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unsigned char *l_to_addr[MAX_GBUFFERS][MAX_LNUM];
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int l_to_next_idx[MAX_GBUFFERS][MAX_LNUM];
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int l_to_next_size[MAX_GBUFFERS][MAX_LNUM];
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int lsize[MAX_GBUFFERS], lnum[MAX_GBUFFERS];
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#endif
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};
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#endif /* __KERNEL__ */
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#endif /* _PLANB_H_ */
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