drivers/media/video/planb.h

   1 /*
   2     planb - PlanB frame grabber driver
   3
   4     PlanB is used in the 7x00/8x00 series of PowerMacintosh
   5     Computers as video input DMA controller.
   6
   7     Copyright (C) 1998 Michel Lanners (mlan@cpu.lu)
   8
   9     Based largely on the bttv driver by Ralph Metzler (rjkm@thp.uni-koeln.de)
  10
  11     Additional debugging and coding by Takashi Oe (toe@unlserve.unl.edu)
  12
  13
  14     This program is free software; you can redistribute it and/or modify
  15     it under the terms of the GNU General Public License as published by
  16     the Free Software Foundation; either version 2 of the License, or
  17     (at your option) any later version.
  18
  19     This program is distributed in the hope that it will be useful,
  20     but WITHOUT ANY WARRANTY; without even the implied warranty of
  21     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22     GNU General Public License for more details.
  23
  24     You should have received a copy of the GNU General Public License
  25     along with this program; if not, write to the Free Software
  26     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27 */
  28
  29 /* $Id: planb.h,v 1.13 1999/05/03 19:28:56 mlan Exp $ */
  30
  31 #ifndef _PLANB_H_
  32 #define _PLANB_H_
  33
  34 #ifdef __KERNEL__
  35 #include <asm/dbdma.h>
  36 #include "saa7196.h"
  37 #endif /* __KERNEL__ */
  38
  39 #define PLANB_DEVICE_NAME       "Apple PlanB Video-In"
  40 #define PLANB_REV               "1.0"
  41
  42 #ifdef __KERNEL__
  43 //#define PLANB_GSCANLINE       /* use this if apps have the notion of */
  44                                 /* grab buffer scanline */
  45 /* This should be safe for both PAL and NTSC */
  46 #define PLANB_MAXPIXELS 768
  47 #define PLANB_MAXLINES 576
  48 #define PLANB_NTSC_MAXLINES 480
  49
  50 /* Uncomment your preferred norm ;-) */
  51 #define PLANB_DEF_NORM VIDEO_MODE_PAL
  52 //#define PLANB_DEF_NORM VIDEO_MODE_NTSC
  53 //#define PLANB_DEF_NORM VIDEO_MODE_SECAM
  54
  55 /* fields settings */
  56 #define PLANB_GRAY      0x1     /*  8-bit mono? */
  57 #define PLANB_COLOUR15  0x2     /* 16-bit mode */
  58 #define PLANB_COLOUR32  0x4     /* 32-bit mode */
  59 #define PLANB_CLIPMASK  0x8     /* hardware clipmasking */
  60
  61 /* misc. flags for PlanB DMA operation */
  62 #define CH_SYNC         0x1     /* synchronize channels (set by ch1;
  63                                    cleared by ch2) */
  64 #define FIELD_SYNC      0x2     /* used for the start of each field
  65                                    (0 -> 1 -> 0 for ch1; 0 -> 1 for ch2) */
  66 #define EVEN_FIELD      0x0     /* even field is detected if unset */
  67 #define DMA_ABORT       0x2     /* error or just out of sync if set */
  68 #define ODD_FIELD       0x4     /* odd field is detected if set */
  69
  70 /* for capture operations */
  71 #define MAX_GBUFFERS    2
  72 /* note PLANB_MAX_FBUF must be divisible by PAGE_SIZE */
  73 #ifdef PLANB_GSCANLINE
  74 #define PLANB_MAX_FBUF  0x240000        /* 576 * 1024 * 4 */
  75 #define TAB_FACTOR      (1)
  76 #else
  77 #define PLANB_MAX_FBUF  0x1b0000        /* 576 * 768 * 4 */
  78 #define TAB_FACTOR      (2)
  79 #endif
  80 #endif /* __KERNEL__ */
  81
  82 struct planb_saa_regs {
  83         unsigned char addr;
  84         unsigned char val;
  85 };
  86
  87 struct planb_stat_regs {
  88         unsigned int ch1_stat;
  89         unsigned int ch2_stat;
  90         unsigned char saa_stat0;
  91         unsigned char saa_stat1;
  92 };
  93
  94 struct planb_any_regs {
  95         unsigned int offset;
  96         unsigned int bytes;
  97         unsigned char data[128];
  98 };
  99
 100 /* planb private ioctls */
 101 #define PLANBIOCGSAAREGS        _IOWR('v', BASE_VIDIOCPRIVATE, struct planb_saa_regs)   /* Read a saa7196 reg value */
 102 #define PLANBIOCSSAAREGS        _IOW('v', BASE_VIDIOCPRIVATE + 1, struct planb_saa_regs)        /* Set a saa7196 reg value */
 103 #define PLANBIOCGSTAT           _IOR('v', BASE_VIDIOCPRIVATE + 2, struct planb_stat_regs)       /* Read planb status */
 104 #define PLANB_TV_MODE           1
 105 #define PLANB_VTR_MODE          2
 106 #define PLANBIOCGMODE           _IOR('v', BASE_VIDIOCPRIVATE + 3, int)  /* Get TV/VTR mode */
 107 #define PLANBIOCSMODE           _IOW('v', BASE_VIDIOCPRIVATE + 4, int)  /* Set TV/VTR mode */
 108
 109 #ifdef PLANB_GSCANLINE
 110 #define PLANBG_GRAB_BPL         _IOR('v', BASE_VIDIOCPRIVATE + 5, int)  /* # of bytes per scanline in grab buffer */
 111 #endif
 112
 113 /* call wake_up_interruptible() with appropriate actions */
 114 #define PLANB_INTR_DEBUG        _IOW('v', BASE_VIDIOCPRIVATE + 20, int)
 115 /* investigate which reg does what */
 116 #define PLANB_INV_REGS          _IOWR('v', BASE_VIDIOCPRIVATE + 21, struct planb_any_regs)
 117
 118 #ifdef __KERNEL__
 119
 120 /* Potentially useful macros */
 121 #define PLANB_SET(x)    ((x) << 16 | (x))
 122 #define PLANB_CLR(x)    ((x) << 16)
 123
 124 /* This represents the physical register layout */
 125 struct planb_registers {
 126         volatile struct dbdma_regs      ch1;            /* 0x00: video in */
 127         volatile unsigned int           even;           /* 0x40: even field setting */
 128         volatile unsigned int           odd;            /* 0x44; odd field setting */
 129         unsigned int                    pad1[14];       /* empty? */
 130         volatile struct dbdma_regs      ch2;            /* 0x80: clipmask out */
 131         unsigned int                    pad2[16];       /* 0xc0: empty? */
 132         volatile unsigned int           reg3;           /* 0x100: ???? */
 133         volatile unsigned int           intr_stat;      /* 0x104: irq status */
 134 #define PLANB_CLR_IRQ           0x00            /* clear Plan B interrupt */
 135 #define PLANB_GEN_IRQ           0x01            /* assert Plan B interrupt */
 136 #define PLANB_FRM_IRQ           0x0100          /* end of frame */
 137         unsigned int                    pad3[1];        /* empty? */
 138         volatile unsigned int           reg5;           /* 0x10c: ??? */
 139         unsigned int                    pad4[60];       /* empty? */
 140         volatile unsigned char          saa_addr;       /* 0x200: SAA subadr */
 141         char                            pad5[3];
 142         volatile unsigned char          saa_regval;     /* SAA7196 write reg. val */
 143         char                            pad6[3];
 144         volatile unsigned char          saa_status;     /* SAA7196 status byte */
 145         /* There is more unused stuff here */
 146 };
 147
 148 struct planb_window {
 149         int     x, y;
 150         ushort  width, height;
 151         ushort  bpp, bpl, depth, pad;
 152         ushort  swidth, sheight;
 153         int     norm;
 154         int     interlace;
 155         u32     color_fmt;
 156         int     chromakey;
 157         int     mode;           /* used to switch between TV/VTR modes */
 158 };
 159
 160 struct planb_suspend {
 161         int overlay;
 162         int frame;
 163         struct dbdma_cmd cmd;
 164 };
 165
 166 struct planb {
 167         struct  video_device video_dev;
 168         struct  video_picture picture;          /* Current picture params */
 169         struct  video_audio audio_dev;          /* Current audio params */
 170
 171         volatile struct planb_registers *planb_base;    /* virt base of planb */
 172         struct planb_registers *planb_base_phys;        /* phys base of planb */
 173         void    *priv_space;                    /* Org. alloc. mem for kfree */
 174         int     user;
 175         unsigned int tab_size;
 176         int     maxlines;
 177         struct mutex lock;
 178         unsigned int    irq;                    /* interrupt number */
 179         volatile unsigned int intr_mask;
 180
 181         int     overlay;                        /* overlay running? */
 182         struct  planb_window win;
 183         unsigned long frame_buffer_phys;        /* We need phys for DMA */
 184         int     offset;                         /* offset of pixel 1 */
 185         volatile struct dbdma_cmd *ch1_cmd;     /* Video In DMA cmd buffer */
 186         volatile struct dbdma_cmd *ch2_cmd;     /* Clip Out DMA cmd buffer */
 187         volatile struct dbdma_cmd *overlay_last1;
 188         volatile struct dbdma_cmd *overlay_last2;
 189         unsigned long ch1_cmd_phys;
 190         volatile unsigned char *mask;           /* Clipmask buffer */
 191         int suspend;
 192         wait_queue_head_t suspendq;
 193         struct planb_suspend suspended;
 194         int     cmd_buff_inited;                /* cmd buffer inited? */
 195
 196         int grabbing;
 197         unsigned int gcount;
 198         wait_queue_head_t capq;
 199         int last_fr;
 200         int prev_last_fr;
 201         unsigned char **rawbuf;
 202         int rawbuf_size;
 203         int gbuf_idx[MAX_GBUFFERS];
 204         volatile struct dbdma_cmd *cap_cmd[MAX_GBUFFERS];
 205         volatile struct dbdma_cmd *last_cmd[MAX_GBUFFERS];
 206         volatile struct dbdma_cmd *pre_cmd[MAX_GBUFFERS];
 207         int need_pre_capture[MAX_GBUFFERS];
 208 #define PLANB_DUMMY 40  /* # of command buf's allocated for pre-capture seq. */
 209         int gwidth[MAX_GBUFFERS], gheight[MAX_GBUFFERS];
 210         unsigned int gfmt[MAX_GBUFFERS];
 211         int gnorm_switch[MAX_GBUFFERS];
 212         volatile unsigned int *frame_stat;
 213 #define GBUFFER_UNUSED       0x00U
 214 #define GBUFFER_GRABBING     0x01U
 215 #define GBUFFER_DONE         0x02U
 216 #ifdef PLANB_GSCANLINE
 217         int gbytes_per_line;
 218 #else
 219 #define MAX_LNUM 431    /* change this if PLANB_MAXLINES or */
 220                         /* PLANB_MAXPIXELS changes */
 221         int l_fr_addr_idx[MAX_GBUFFERS];
 222         unsigned char *l_to_addr[MAX_GBUFFERS][MAX_LNUM];
 223         int l_to_next_idx[MAX_GBUFFERS][MAX_LNUM];
 224         int l_to_next_size[MAX_GBUFFERS][MAX_LNUM];
 225         int lsize[MAX_GBUFFERS], lnum[MAX_GBUFFERS];
 226 #endif
 227 };
 228
 229 #endif /* __KERNEL__ */
 230
 231 #endif /* _PLANB_H_ */