vid_1200.c   [plain text]

/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/nsc/gfx/vid_1200.c,v 1.2 2003/01/14 09:34:34 alanh Exp $ */
/*
 * $Workfile: vid_1200.c $
 *
 * This file contains routines to control the SC1200 video overlay hardware.
 *
 * NSC_LIC_ALTERNATIVE_PREAMBLE
 *
 * Revision 1.0
 *
 * National Semiconductor Alternative GPL-BSD License
 *
 * National Semiconductor Corporation licenses this software 
 * ("Software"):
 *
 *      Durango
 *
 * under one of the two following licenses, depending on how the 
 * Software is received by the Licensee.
 * 
 * If this Software is received as part of the Linux Framebuffer or
 * other GPL licensed software, then the GPL license designated 
 * NSC_LIC_GPL applies to this Software; in all other circumstances 
 * then the BSD-style license designated NSC_LIC_BSD shall apply.
 *
 * END_NSC_LIC_ALTERNATIVE_PREAMBLE */

/* NSC_LIC_BSD
 *
 * National Semiconductor Corporation Open Source License for Durango
 *
 * (BSD License with Export Notice)
 *
 * Copyright (c) 1999-2001
 * National Semiconductor Corporation.
 * All rights reserved.
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 * Redistribution and use in source and binary forms, with or without 
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 * EXPORT LAWS: THIS LICENSE ADDS NO RESTRICTIONS TO THE EXPORT LAWS OF 
 * YOUR JURISDICTION. It is licensee's responsibility to comply with 
 * any export regulations applicable in licensee's jurisdiction. Under 
 * CURRENT (2001) U.S. export regulations this software 
 * is eligible for export from the U.S. and can be downloaded by or 
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 * has embargoed goods and services. 
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 * END_NSC_LIC_BSD */

/* NSC_LIC_GPL
 *
 * National Semiconductor Corporation Gnu General Public License for Durango
 *
 * (GPL License with Export Notice)
 *
 * Copyright (c) 1999-2001
 * National Semiconductor Corporation.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted 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  
 *
 * In addition to the terms of the GNU General Public License, neither 
 * the name of the National Semiconductor Corporation nor the names of 
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 * from this software without specific prior written permission. 
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
 * NATIONAL SEMICONDUCTOR CORPORATION OR CONTRIBUTORS BE LIABLE FOR ANY 
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE, 
 * INTELLECTUAL PROPERTY INFRINGEMENT, OR OTHERWISE) ARISING IN ANY WAY 
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
 * OF SUCH DAMAGE. See the GNU General Public License for more details. 
 *
 * EXPORT LAWS: THIS LICENSE ADDS NO RESTRICTIONS TO THE EXPORT LAWS OF 
 * YOUR JURISDICTION. It is licensee's responsibility to comply with 
 * any export regulations applicable in licensee's jurisdiction. Under 
 * CURRENT (2001) U.S. export regulations this software 
 * is eligible for export from the U.S. and can be downloaded by or 
 * otherwise exported or reexported worldwide EXCEPT to U.S. embargoed 
 * destinations which include Cuba, Iraq, Libya, North Korea, Iran, 
 * Syria, Sudan, Afghanistan and any other country to which the U.S. 
 * has embargoed goods and services. 
 *
 * You should have received a copy of the GNU General Public License 
 * along with this file; if not, write to the Free Software Foundation, 
 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
 *
 * END_NSC_LIC_GPL */

/*----------------------------------------------------------------------------
 * SC1200 PLL TABLE
 *----------------------------------------------------------------------------
 */

typedef struct tagSC1200PLL
{
   long frequency;			/* 16.16 fixed point frequency */
   unsigned long clock_select;		/* clock select register (0x2C) */
}
SC1200PLL;

SC1200PLL gfx_sc1200_clock_table[] = {
   {(25L << 16) | ((1750L * 65536L) / 10000L), 0x0070E00C},	/* 25.1750 (sc=24.9231) */
   {(27L << 16) | ((0000L * 65536L) / 10000L), 0x00300100},	/* 27.0000 */
   {(28L << 16) | ((3220L * 65536L) / 10000L), 0x0070EC0C},	/* 28.3220 (SC=27.000) */
   {(31L << 16) | ((5000L * 65536L) / 10000L), 0x00500D02},	/* 31.5000 */
   {(36L << 16) | ((0000L * 65536L) / 10000L), 0x00500F02},	/* 36.0000 */
   {(37L << 16) | ((5000L * 65536L) / 10000L), 0x0050B108},	/* 37.5000 */
   {(40L << 16) | ((0000L * 65536L) / 10000L), 0x0050D20D},	/* 40.0000 */
   {(44L << 16) | ((9000L * 65536L) / 10000L), 0x0050DC0D},	/* 44.9000 */
   {(49L << 16) | ((5000L * 65536L) / 10000L), 0x00501502},	/* 49.5000 */
   {(50L << 16) | ((0000L * 65536L) / 10000L), 0x0050A404},	/* 50.0000 */
   {(50L << 16) | ((3500L * 65536L) / 10000L), 0x0050E00C},	/* 50.3500 */
   {(54L << 16) | ((0000L * 65536L) / 10000L), 0x00300300},	/* 54.0000 */
   {(56L << 16) | ((3916L * 65536L) / 10000L), 0x0050F40D},	/* 56.3916 */
   {(56L << 16) | ((6440L * 65536L) / 10000L), 0x0050EC0C},	/* 56.6440 */
   {(59L << 16) | ((0000L * 65536L) / 10000L), 0x0030A207},	/* 59.0000 */
   {(63L << 16) | ((0000L * 65536L) / 10000L), 0x00300D02},	/* 63.0000 */
   {(65L << 16) | ((0000L * 65536L) / 10000L), 0x0030CC0F},	/* 65.0000 */
   {(67L << 16) | ((5000L * 65536L) / 10000L), 0x00300400},	/* 67.5000 */
   {(70L << 16) | ((8000L * 65536L) / 10000L), 0x00301403},	/* 70.8000 */
   {(72L << 16) | ((0000L * 65536L) / 10000L), 0x00300F02},	/* 72.0000 */
   {(75L << 16) | ((0000L * 65536L) / 10000L), 0x0030B108},	/* 75.0000 */
   {(78L << 16) | ((7500L * 65536L) / 10000L), 0x0030A205},	/* 78.7500 */
   {(80L << 16) | ((0000L * 65536L) / 10000L), 0x0030D20D},	/* 80.0000 */
   {(87L << 16) | ((2728L * 65536L) / 10000L), 0x0030E00E},	/* 87.2728 */
   {(89L << 16) | ((8000L * 65536L) / 10000L), 0x0030DC0D},	/* 89.8000 */
   {(94L << 16) | ((5000L * 65536L) / 10000L), 0x00300600},	/* 99.0000 */
   {(99L << 16) | ((0000L * 65536L) / 10000L), 0x00301502},	/* 99.0000 */
   {(100L << 16) | ((0000L * 65536L) / 10000L), 0x0030A404},	/* 100.00 */
   {(108L << 16) | ((0000L * 65536L) / 10000L), 0x00100300},	/* 108.00 */
   {(112L << 16) | ((5000L * 65536L) / 10000L), 0x00301802},	/* 108.00 */
   {(130L << 16) | ((0000L * 65536L) / 10000L), 0x0010CC0F},	/* 130.00 */
   {(135L << 16) | ((0000L * 65536L) / 10000L), 0x00100400},	/* 135.00 */
   {(157L << 16) | ((5000L * 65536L) / 10000L), 0x0010A205},	/* 157.50 */
   {(162L << 16) | ((0000L * 65536L) / 10000L), 0x00100500},	/* 162.00 */
   {(175L << 16) | ((0000L * 65536L) / 10000L), 0x0010E00E},	/* 175.50 */
   {(189L << 16) | ((0000L * 65536L) / 10000L), 0x00100600},	/* 189.00 */
   {(202L << 16) | ((0000L * 65536L) / 10000L), 0x0010EF0E},	/* 202.50 */
   {(232L << 16) | ((0000L * 65536L) / 10000L), 0x0010AA04},	/* 232.50 */

   /* Precomputed inidces in the hardware */
   {0x0018EC4D, 0x000F0000},		/*  24.923052 */
   {0x00192CCC, 0x00000000},		/*  25.1750 */
   {0x001B0000, 0x00300100},		/*  27.0000 */
   {0x001F8000, 0x00010000},		/*  31.5000 */
   {0x00240000, 0x00020000},		/*  36.0000 */
   {0x00280000, 0x00030000},		/*  40.0000 */
   {0x00318000, 0x00050000},		/*  49.5000 */
   {0x00320000, 0x00040000},		/*  50.0000 */
   {0x00384000, 0x00060000},		/*  56.2500 */
   {0x00410000, 0x00080000},		/*  65.0000 */
   {0x004E8000, 0x000A0000},		/*  78.5000 */
   {0x005E8000, 0x000B0000},		/*  94.5000 */
   {0x006C0000, 0x000C0000},		/* 108.0000 */
   {0x00870000, 0x000D0000},		/* 135.0000 */
};

#define NUM_SC1200_FREQUENCIES sizeof(gfx_sc1200_clock_table)/sizeof(SC1200PLL)

int sc1200_set_video_enable(int enable);
int sc1200_set_video_format(unsigned long format);
int sc1200_set_video_size(unsigned short width, unsigned short height);
int sc1200_set_video_yuv_pitch(unsigned long ypitch, unsigned long uvpitch);
int sc1200_set_video_offset(unsigned long offset);
int sc1200_set_video_yuv_offsets(unsigned long yoffset, unsigned long uoffset,
				 unsigned long voffset);
int sc1200_set_video_window(short x, short y, unsigned short w,
			    unsigned short h);
int sc1200_set_video_left_crop(unsigned short x);
int sc1200_set_video_upscale(unsigned short srcw, unsigned short srch,
			     unsigned short dstw, unsigned short dsth);
int sc1200_set_video_scale(unsigned short srcw, unsigned short srch,
			   unsigned short dstw, unsigned short dsth);
int sc1200_set_video_vertical_downscale(unsigned short srch,
					unsigned short dsth);
void sc1200_set_video_vertical_downscale_enable(int enable);
int sc1200_set_video_downscale_config(unsigned short type, unsigned short m);
int sc1200_set_video_color_key(unsigned long key, unsigned long mask,
			       int bluescreen);
int sc1200_set_video_filter(int xfilter, int yfilter);
int sc1200_set_video_palette(unsigned long *palette);
int sc1200_set_video_palette_entry(unsigned long index, unsigned long color);
int sc1200_set_video_downscale_coefficients(unsigned short coef1,
					    unsigned short coef2,
					    unsigned short coef3,
					    unsigned short coef4);
int sc1200_set_video_downscale_enable(int enable);
int sc1200_set_video_source(VideoSourceType source);
int sc1200_set_vbi_source(VbiSourceType source);
int sc1200_set_vbi_lines(unsigned long even, unsigned long odd);
int sc1200_set_vbi_total(unsigned long even, unsigned long odd);
int sc1200_set_video_interlaced(int enable);
int sc1200_set_color_space_YUV(int enable);
int sc1200_set_vertical_scaler_offset(char offset);
int sc1200_set_top_line_in_odd(int enable);
int sc1200_set_genlock_delay(unsigned long delay);
int sc1200_set_genlock_enable(int flags);
int sc1200_set_video_cursor(unsigned long key, unsigned long mask,
			    unsigned short select_color2,
			    unsigned long color1, unsigned long color2);
int sc1200_set_video_cursor_enable(int enable);
int sc1200_set_video_request(short x, short y);

int sc1200_select_alpha_region(int region);
int sc1200_set_alpha_enable(int enable);
int sc1200_set_alpha_window(short x, short y,
			    unsigned short width, unsigned short height);
int sc1200_set_alpha_value(unsigned char alpha, char delta);
int sc1200_set_alpha_priority(int priority);
int sc1200_set_alpha_color(unsigned long color);
int sc1200_set_alpha_color_enable(int enable);
int sc1200_set_no_ck_outside_alpha(int enable);
int sc1200_disable_softvga(void);
int sc1200_enable_softvga(void);
int sc1200_set_macrovision_enable(int enable);
void sc1200_reset_video(void);
int sc1200_set_display_control(int sync_polarities);
void sc1200_set_clock_frequency(unsigned long frequency);
int sc1200_set_screen_enable(int enable);
int sc1200_set_crt_enable(int enable);

/* READ ROUTINES IN GFX_VID.C */

int sc1200_get_video_enable(void);
int sc1200_get_video_format(void);
unsigned long sc1200_get_video_src_size(void);
unsigned long sc1200_get_video_line_size(void);
unsigned long sc1200_get_video_xclip(void);
unsigned long sc1200_get_video_offset(void);
void sc1200_get_video_yuv_offsets(unsigned long *yoffset,
				  unsigned long *uoffset,
				  unsigned long *voffset);
void sc1200_get_video_yuv_pitch(unsigned long *ypitch,
				unsigned long *uvpitch);
unsigned long sc1200_get_video_upscale(void);
unsigned long sc1200_get_video_scale(void);
unsigned long sc1200_get_video_downscale_delta(void);
int sc1200_get_video_vertical_downscale_enable(void);
int sc1200_get_video_downscale_config(unsigned short *type,
				      unsigned short *m);
void sc1200_get_video_downscale_coefficients(unsigned short *coef1,
					     unsigned short *coef2,
					     unsigned short *coef3,
					     unsigned short *coef4);
void sc1200_get_video_downscale_enable(int *enable);
unsigned long sc1200_get_video_dst_size(void);
unsigned long sc1200_get_video_position(void);
unsigned long sc1200_get_video_color_key(void);
unsigned long sc1200_get_video_color_key_mask(void);
int sc1200_get_video_palette_entry(unsigned long index,
				   unsigned long *palette);
int sc1200_get_video_color_key_src(void);
int sc1200_get_video_filter(void);
int sc1200_get_video_request(short *x, short *y);
int sc1200_get_video_source(VideoSourceType * source);
int sc1200_get_vbi_source(VbiSourceType * source);
unsigned long sc1200_get_vbi_lines(int odd);
unsigned long sc1200_get_vbi_total(int odd);
int sc1200_get_video_interlaced(void);
int sc1200_get_color_space_YUV(void);
int sc1200_get_vertical_scaler_offset(char *offset);
unsigned long sc1200_get_genlock_delay(void);
int sc1200_get_genlock_enable(void);
int sc1200_get_video_cursor(unsigned long *key, unsigned long *mask,
			    unsigned short *select_color2,
			    unsigned long *color1, unsigned short *color2);
unsigned long sc1200_read_crc(void);
unsigned long sc1200_read_crc32(void);
unsigned long sc1200_read_window_crc(int source, unsigned short x,
				     unsigned short y, unsigned short width,
				     unsigned short height, int crc32);
int sc1200_get_macrovision_enable(void);

void sc1200_get_alpha_enable(int *enable);
void sc1200_get_alpha_size(unsigned short *x, unsigned short *y,
			   unsigned short *width, unsigned short *height);
void sc1200_get_alpha_value(unsigned char *alpha, char *delta);
void sc1200_get_alpha_priority(int *priority);
void sc1200_get_alpha_color(unsigned long *color);
unsigned long sc1200_get_clock_frequency(void);
int sc1200_get_vsa2_softvga_enable(void);
int sc1200_get_sync_polarities(void);

/*---------------------------------------------------------------------------
 * gfx_reset_video (PRIVATE ROUTINE: NOT PART OF DURANGO API)
 *
 * This routine is used to disable all components of video overlay before
 * performing a mode switch.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
void
sc1200_reset_video(void)
#else
void
gfx_reset_video(void)
#endif
{
   int i;

   gfx_set_video_enable(0);

   /* SET WINDOW 0 AFTER RESET */

   for (i = 2; i >= 0; i--) {
      gfx_select_alpha_region(i);
      gfx_set_alpha_enable(0);
      gfx_set_alpha_color_enable(0);
   }
}

/*-----------------------------------------------------------------------------
 * gfx_set_display_control (PRIVATE ROUTINE: NOT PART OF DURANGO API)
 *
 * This routine configures the display output.
 *
 * "sync_polarities" is used to set the polarities of the sync pulses according
 * to the following mask:
 *
 *     Bit 0: If set to 1, negative horizontal polarity is programmed,
 *            otherwise positive horizontal polarity is programmed.
 *     Bit 1: If set to 1, negative vertical polarity is programmed,
 *            otherwise positive vertical polarity is programmed.
 *
 *-----------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_display_control(int sync_polarities)
#else
int
gfx_set_display_control(int sync_polarities)
#endif
{
   unsigned long dcfg;

   /* CONFIGURE DISPLAY OUTPUT FROM VIDEO PROCESSOR */

   dcfg = READ_VID32(SC1200_DISPLAY_CONFIG);
   dcfg &= ~(SC1200_DCFG_CRT_SYNC_SKW_MASK | SC1200_DCFG_PWR_SEQ_DLY_MASK |
	     SC1200_DCFG_CRT_HSYNC_POL | SC1200_DCFG_CRT_VSYNC_POL |
	     SC1200_DCFG_FP_PWR_EN | SC1200_DCFG_FP_DATA_EN);

   dcfg |= (SC1200_DCFG_CRT_SYNC_SKW_INIT |
	    SC1200_DCFG_PWR_SEQ_DLY_INIT | SC1200_DCFG_GV_PAL_BYP);

   if (PanelEnable)
      dcfg |= SC1200_DCFG_FP_PWR_EN;

   /* SET APPROPRIATE SYNC POLARITIES */

   if (sync_polarities & 0x1)
      dcfg |= SC1200_DCFG_CRT_HSYNC_POL;
   if (sync_polarities & 0x2)
      dcfg |= SC1200_DCFG_CRT_VSYNC_POL;

   WRITE_VID32(SC1200_DISPLAY_CONFIG, dcfg);

   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_clock_frequency
 *
 * This routine sets the clock frequency, specified as a 16.16 fixed point
 * value (0x00318000 = 49.5 MHz).  It will set the closest frequency found
 * in the lookup table.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
void
sc1200_set_clock_frequency(unsigned long frequency)
#else
void
gfx_set_clock_frequency(unsigned long frequency)
#endif
{
   unsigned int index;
   unsigned long value, pll;
   long min, diff;

   /* FIND THE REGISTER VALUES FOR THE DESIRED FREQUENCY */
   /* Search the table for the closest frequency (16.16 format). */

   value = gfx_sc1200_clock_table[0].clock_select;
   min = (long)gfx_sc1200_clock_table[0].frequency - frequency;
   if (min < 0L)
      min = -min;
   for (index = 1; index < NUM_SC1200_FREQUENCIES; index++) {
      diff = (long)gfx_sc1200_clock_table[index].frequency - frequency;
      if (diff < 0L)
	 diff = -diff;
      if (diff < min) {
	 min = diff;
	 value = gfx_sc1200_clock_table[index].clock_select;
      }
   }

   /* SET THE DOT CLOCK REGISTER */

   pll = READ_VID32(SC1200_VID_MISC);
   WRITE_VID32(SC1200_VID_MISC, pll | SC1200_PLL_POWER_NORMAL);
   WRITE_VID32(SC1200_VID_CLOCK_SELECT, value);
   return;
}

/*---------------------------------------------------------------------------
 * gfx_set_screen_enable (PRIVATE ROUTINE - NOT PART OF API)
 * 
 * This routine enables or disables the graphics display logic of the video processor.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_screen_enable(int enable)
#else
int
gfx_set_screen_enable(int enable)
#endif
{
   unsigned long config;

   config = READ_VID32(SC1200_DISPLAY_CONFIG);
   if (enable)
      WRITE_VID32(SC1200_DISPLAY_CONFIG, config | SC1200_DCFG_DIS_EN);
   else
      WRITE_VID32(SC1200_DISPLAY_CONFIG, config & ~SC1200_DCFG_DIS_EN);
   return (GFX_STATUS_OK);
}

/*---------------------------------------------------------------------------
 * gfx_set_crt_enable
 * 
 * This routine enables or disables the CRT output from the video processor.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_crt_enable(int enable)
#else
int
gfx_set_crt_enable(int enable)
#endif
{
   unsigned long config, misc;

   config = READ_VID32(SC1200_DISPLAY_CONFIG);
   misc = READ_VID32(SC1200_VID_MISC);

   /*
    *  IMPORTANT: For all modes do NOT disable the graphics display logic
    *  because it might be needed for TV
    */

   switch (enable) {
   case CRT_DISABLE:			/* HSync:Off VSync:Off */
      WRITE_VID32(SC1200_DISPLAY_CONFIG, config & ~(SC1200_DCFG_HSYNC_EN
						    | SC1200_DCFG_VSYNC_EN
						    | SC1200_DCFG_DAC_BL_EN));
      WRITE_VID32(SC1200_VID_MISC, misc | SC1200_DAC_POWER_DOWN);
      break;
   case CRT_ENABLE:			/* Enable CRT display, including display logic */
      WRITE_VID32(SC1200_DISPLAY_CONFIG, config | SC1200_DCFG_HSYNC_EN
		  | SC1200_DCFG_VSYNC_EN | SC1200_DCFG_DAC_BL_EN);
      WRITE_VID32(SC1200_VID_MISC, misc & ~SC1200_DAC_POWER_DOWN);

      /* ENABLE GRAPHICS DISPLAY LOGIC */
      gfx_set_screen_enable(1);
      break;
   case CRT_STANDBY:			/* HSync:Off VSync:On */
      WRITE_VID32(SC1200_DISPLAY_CONFIG, (config & ~(SC1200_DCFG_HSYNC_EN
						     | SC1200_DCFG_DAC_BL_EN))
		  | SC1200_DCFG_VSYNC_EN);
      WRITE_VID32(SC1200_VID_MISC, misc | SC1200_DAC_POWER_DOWN);
      break;
   case CRT_SUSPEND:			/* HSync:On VSync:Off */
      WRITE_VID32(SC1200_DISPLAY_CONFIG, (config & ~(SC1200_DCFG_VSYNC_EN
						     | SC1200_DCFG_DAC_BL_EN))
		  | SC1200_DCFG_HSYNC_EN);
      WRITE_VID32(SC1200_VID_MISC, misc | SC1200_DAC_POWER_DOWN);
      break;
   default:
      return GFX_STATUS_BAD_PARAMETER;
   }
   return (GFX_STATUS_OK);
}

/*-----------------------------------------------------------------------------
 * gfx_set_video_enable
 *
 * This routine enables or disables the video overlay functionality.
 *-----------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_enable(int enable)
#else
int
gfx_set_video_enable(int enable)
#endif
{
   unsigned long vcfg;

   /* WAIT FOR VERTICAL BLANK TO START */
   /* Otherwise a glitch can be observed. */

   if (gfx_test_timing_active()) {
      if (!gfx_test_vertical_active()) {
	 while (!gfx_test_vertical_active()) ;
      }
      while (gfx_test_vertical_active()) ;
   }

   vcfg = READ_VID32(SC1200_VIDEO_CONFIG);
   if (enable) {
      /* ENABLE VIDEO OVERLAY FROM DISPLAY CONTROLLER */
      /* Use private routine to abstract the display controller. */

      gfx_set_display_video_enable(1);

      /* ENABLE SC1200 VIDEO OVERLAY */

      vcfg |= SC1200_VCFG_VID_EN;
      WRITE_VID32(SC1200_VIDEO_CONFIG, vcfg);
   } else {
      /* DISABLE SC1200 VIDEO OVERLAY */

      vcfg &= ~SC1200_VCFG_VID_EN;
      WRITE_VID32(SC1200_VIDEO_CONFIG, vcfg);

      /* DISABLE VIDEO OVERLAY FROM DISPLAY CONTROLLER */
      /* Use private routine to abstract the display controller. */

      gfx_set_display_video_enable(0);
   }
   return (0);
}

/*-----------------------------------------------------------------------------
 * gfx_set_video_format
 *
 * Sets input video format type, to one of the YUV formats or to RGB.
 *-----------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_format(unsigned long format)
#else
int
gfx_set_video_format(unsigned long format)
#endif
{
   unsigned long ctrl, vcfg = 0;

   /* SET THE SC1200 VIDEO INPUT FORMAT */

   vcfg = READ_VID32(SC1200_VIDEO_CONFIG);
   ctrl = READ_VID32(SC1200_VID_ALPHA_CONTROL);
   ctrl &= ~(SC1200_VIDEO_INPUT_IS_RGB);
   vcfg &= ~(SC1200_VCFG_VID_INP_FORMAT | SC1200_VCFG_4_2_0_MODE);
   switch (format) {
   case VIDEO_FORMAT_UYVY:
      vcfg |= SC1200_VCFG_UYVY_FORMAT;
      break;
   case VIDEO_FORMAT_YUYV:
      vcfg |= SC1200_VCFG_YUYV_FORMAT;
      break;
   case VIDEO_FORMAT_Y2YU:
      vcfg |= SC1200_VCFG_Y2YU_FORMAT;
      break;
   case VIDEO_FORMAT_YVYU:
      vcfg |= SC1200_VCFG_YVYU_FORMAT;
      break;
   case VIDEO_FORMAT_Y0Y1Y2Y3:
      vcfg |= SC1200_VCFG_UYVY_FORMAT;
      vcfg |= SC1200_VCFG_4_2_0_MODE;
      break;
   case VIDEO_FORMAT_Y3Y2Y1Y0:
      vcfg |= SC1200_VCFG_Y2YU_FORMAT;
      vcfg |= SC1200_VCFG_4_2_0_MODE;
      break;
   case VIDEO_FORMAT_Y1Y0Y3Y2:
      vcfg |= SC1200_VCFG_YUYV_FORMAT;
      vcfg |= SC1200_VCFG_4_2_0_MODE;
      break;
   case VIDEO_FORMAT_Y1Y2Y3Y0:
      vcfg |= SC1200_VCFG_YVYU_FORMAT;
      vcfg |= SC1200_VCFG_4_2_0_MODE;
      break;
   case VIDEO_FORMAT_RGB:
      ctrl |= SC1200_VIDEO_INPUT_IS_RGB;
      vcfg |= SC1200_VCFG_UYVY_FORMAT;
      break;
   case VIDEO_FORMAT_P2M_P2L_P1M_P1L:
      ctrl |= SC1200_VIDEO_INPUT_IS_RGB;
      vcfg |= SC1200_VCFG_Y2YU_FORMAT;
      break;
   case VIDEO_FORMAT_P1M_P1L_P2M_P2L:
      ctrl |= SC1200_VIDEO_INPUT_IS_RGB;
      vcfg |= SC1200_VCFG_YUYV_FORMAT;
      break;
   case VIDEO_FORMAT_P1M_P2L_P2M_P1L:
      ctrl |= SC1200_VIDEO_INPUT_IS_RGB;
      vcfg |= SC1200_VCFG_YVYU_FORMAT;
      break;
   default:
      return GFX_STATUS_BAD_PARAMETER;
   }

   /* ALWAYS DISABLE GRAPHICS CSC */
   /* This is enabled in the function gfx_set_color_space_YUV for */
   /* YUV blending on TV.                                         */

   ctrl &= ~SC1200_CSC_GFX_RGB_TO_YUV;

   if (ctrl & SC1200_VIDEO_INPUT_IS_RGB)
      ctrl &= ~SC1200_CSC_VIDEO_YUV_TO_RGB;
   else
      ctrl |= SC1200_CSC_VIDEO_YUV_TO_RGB;

   WRITE_VID32(SC1200_VIDEO_CONFIG, vcfg);
   WRITE_VID32(SC1200_VID_ALPHA_CONTROL, ctrl);

   return (0);
}

/*-----------------------------------------------------------------------------
 * gfx_set_video_size
 *
 * This routine specifies the size of the source data.  It is used only 
 * to determine how much data to transfer per frame, and is not used to 
 * calculate the scaling value (that is handled by a separate routine).
 *-----------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_size(unsigned short width, unsigned short height)
#else
int
gfx_set_video_size(unsigned short width, unsigned short height)
#endif
{
   unsigned long size, vcfg;

   /* SET THE SC1200 VIDEO LINE SIZE */

   vcfg = READ_VID32(SC1200_VIDEO_CONFIG);
   vcfg &= ~(SC1200_VCFG_LINE_SIZE_LOWER_MASK | SC1200_VCFG_LINE_SIZE_UPPER);
   size = (width >> 1);
   vcfg |= (size & 0x00FF) << 8;
   if (size & 0x0100)
      vcfg |= SC1200_VCFG_LINE_SIZE_UPPER;
   WRITE_VID32(SC1200_VIDEO_CONFIG, vcfg);

   /* SET TOTAL VIDEO BUFFER SIZE IN DISPLAY CONTROLLER */
   /* Use private routine to abstract the display controller. */

   /* Add 1 line to bypass issue #803 */
   gfx_set_display_video_size(width, (unsigned short)(height + 2));
   return (0);
}

/*-----------------------------------------------------------------------------
 * gfx_set_video_offset
 *
 * This routine sets the starting offset for the video buffer when only 
 * one offset needs to be specified.
 *-----------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_offset(unsigned long offset)
#else
int
gfx_set_video_offset(unsigned long offset)
#endif
{
   /* SAVE VALUE FOR FUTURE CLIPPING OF THE TOP OF THE VIDEO WINDOW */

   gfx_vid_offset = offset;

   /* SET VIDEO BUFFER OFFSET IN DISPLAY CONTROLLER */
   /* Use private routine to abstract the display controller. */

   gfx_set_display_video_offset(offset);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_video_upscale
 * 
 * This routine sets the scale factor for the video overlay window.  The 
 * size of the source and destination regions are specified in pixels.  
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_upscale(unsigned short srcw, unsigned short srch,
			 unsigned short dstw, unsigned short dsth)
#else
int
gfx_set_video_upscale(unsigned short srcw, unsigned short srch,
		      unsigned short dstw, unsigned short dsth)
#endif
{
   unsigned long xscale, yscale;

   /* SAVE PARAMETERS (unless don't-care zero destination arguments are used) */
   /* These are needed for clipping the video window later. */

   if (dstw != 0) {
      gfx_vid_srcw = srcw;
      gfx_vid_dstw = dstw;
   }
   if (dsth != 0) {
      gfx_vid_srch = srch;
      gfx_vid_dsth = dsth;
   }

   /* CALCULATE SC1200 SCALE FACTORS */

   if (dstw == 0)
      xscale = READ_VID32(SC1200_VIDEO_UPSCALE) & 0xffff;	/* keep previous if don't-care argument */
   else if (dstw <= srcw)
      xscale = 0x2000l;			/* horizontal downscaling is currently done in a separate function */
   else if ((srcw == 1) || (dstw == 1))
      return GFX_STATUS_BAD_PARAMETER;
   else
      xscale = (0x2000l * (srcw - 1l)) / (dstw - 1l);

   if (dsth == 0)
      yscale = (READ_VID32(SC1200_VIDEO_UPSCALE) & 0xffff0000) >> 16;	/* keep previous if don't-care argument */
   else if (dsth <= srch)
      yscale = 0x2000l;			/* No vertical downscaling in SC1200 so force to 1x if attempted */
   else if ((srch == 1) || (dsth == 1))
      return GFX_STATUS_BAD_PARAMETER;
   else
      yscale = (0x2000l * (srch - 1l)) / (dsth - 1l);

   WRITE_VID32(SC1200_VIDEO_UPSCALE, (yscale << 16) | xscale);

   /* CALL ROUTINE TO UPDATE WINDOW POSITION */
   /* This is required because the scale values effect the number of */
   /* source data pixels that need to be clipped, as well as the */
   /* amount of data that needs to be transferred. */

   gfx_set_video_window(gfx_vid_xpos, gfx_vid_ypos, gfx_vid_width,
			gfx_vid_height);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_video_scale
 * 
 * This routine sets the scale factor for the video overlay window.  The 
 * size of the source and destination regions are specified in pixels.  
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_scale(unsigned short srcw, unsigned short srch,
		       unsigned short dstw, unsigned short dsth)
#else
int
gfx_set_video_scale(unsigned short srcw, unsigned short srch,
		    unsigned short dstw, unsigned short dsth)
#endif
{
   return gfx_set_video_upscale(srcw, srch, dstw, dsth);
}

/*---------------------------------------------------------------------------
 * gfx_set_video_downscale_config
 * 
 * This routine sets the downscale type and factor for the video overlay window.
 * Note: No downscaling support for RGB565 and YUV420 video formats.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_downscale_config(unsigned short type, unsigned short m)
#else
int
gfx_set_video_downscale_config(unsigned short type, unsigned short m)
#endif
{
   unsigned long downscale;

   if ((m < 1) || (m > 16))
      return GFX_STATUS_BAD_PARAMETER;

   downscale = READ_VID32(SC1200_VIDEO_DOWNSCALER_CONTROL);
   downscale &=
	 ~(SC1200_VIDEO_DOWNSCALE_FACTOR_MASK |
	   SC1200_VIDEO_DOWNSCALE_TYPE_MASK);
   downscale |= ((m - 1l) << SC1200_VIDEO_DOWNSCALE_FACTOR_POS);
   switch (type) {
   case VIDEO_DOWNSCALE_KEEP_1_OF:
      downscale |= SC1200_VIDEO_DOWNSCALE_TYPE_A;
      break;
   case VIDEO_DOWNSCALE_DROP_1_OF:
      downscale |= SC1200_VIDEO_DOWNSCALE_TYPE_B;
      break;
   default:
      return GFX_STATUS_BAD_PARAMETER;
   }
   WRITE_VID32(SC1200_VIDEO_DOWNSCALER_CONTROL, downscale);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_video_downscale_coefficients
 * 
 * This routine sets the downscale filter coefficients.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_downscale_coefficients(unsigned short coef1,
					unsigned short coef2,
					unsigned short coef3,
					unsigned short coef4)
#else
int
gfx_set_video_downscale_coefficients(unsigned short coef1,
				     unsigned short coef2,
				     unsigned short coef3,
				     unsigned short coef4)
#endif
{
   if ((coef1 + coef2 + coef3 + coef4) != 16)
      return GFX_STATUS_BAD_PARAMETER;

   WRITE_VID32(SC1200_VIDEO_DOWNSCALER_COEFFICIENTS,
	       ((unsigned long)coef1 << SC1200_VIDEO_DOWNSCALER_COEF1_POS) |
	       ((unsigned long)coef2 << SC1200_VIDEO_DOWNSCALER_COEF2_POS) |
	       ((unsigned long)coef3 << SC1200_VIDEO_DOWNSCALER_COEF3_POS) |
	       ((unsigned long)coef4 << SC1200_VIDEO_DOWNSCALER_COEF4_POS));
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_video_downscale_enable
 * 
 * This routine enables or disables downscaling for the video overlay window.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_downscale_enable(int enable)
#else
int
gfx_set_video_downscale_enable(int enable)
#endif
{
   unsigned long downscale;

   downscale = READ_VID32(SC1200_VIDEO_DOWNSCALER_CONTROL);
   downscale &= ~SC1200_VIDEO_DOWNSCALE_ENABLE;
   if (enable)
      downscale |= SC1200_VIDEO_DOWNSCALE_ENABLE;
   WRITE_VID32(SC1200_VIDEO_DOWNSCALER_CONTROL, downscale);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_video_window
 * 
 * This routine sets the position and size of the video overlay window.  The 
 * y position is specified in screen relative coordinates, and may be negative.  
 * The size of destination region is specified in pixels.  The line size
 * indicates the number of bytes of source data per scanline.
 * For the effect of negative x values, call the function
 * gfx_set_video_left_crop(). 
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_window(short x, short y, unsigned short w, unsigned short h)
#else
int
gfx_set_video_window(short x, short y, unsigned short w, unsigned short h)
#endif
{
   unsigned long control;
   unsigned long hadjust, vadjust;
   unsigned long xstart, ystart, xend, yend;

   /* For left cropping call the function gfx_set_video_left_crop() */

   if (x < 0)
      return GFX_STATUS_BAD_PARAMETER;

   /* SAVE PARAMETERS */
   /* These are needed to call this routine if the scale value changes. */
   /* In the case of SC1200 they are also needed for restoring when video is re-enabled */

   gfx_vid_xpos = x;
   gfx_vid_ypos = y;
   gfx_vid_width = w;
   gfx_vid_height = h;

   /* GET ADJUSTMENT VALUES */
   /* Use routines to abstract version of display controller. */

   hadjust = gfx_get_htotal() - gfx_get_hsync_end() - 14l;
   vadjust = gfx_get_vtotal() - gfx_get_vsync_end() + 1l;

   /* HORIZONTAL START */

   xstart = (unsigned long)x + hadjust;

   /* HORIZONTAL END */
   /* End positions in register are non-inclusive (one more than the actual end) */

   if ((x + w) < gfx_get_hactive())
      xend = (unsigned long)x + (unsigned long)w + hadjust;
   else					/* right clipping needed */
      xend = (unsigned long)gfx_get_hactive() + hadjust;

   /* VERTICAL START */

   ystart = (unsigned long)y + vadjust;

   /* VERTICAL END */

   if ((y + h) < gfx_get_vactive())
      yend = (unsigned long)y + (unsigned long)h + vadjust;
   else					/* bottom clipping needed */
      yend = (unsigned long)gfx_get_vactive() + vadjust;

   /* SET VIDEO LINE INVERT BIT */

   control = READ_VID32(SC1200_VID_ALPHA_CONTROL);
   if (y & 0x1)
      WRITE_VID32(SC1200_VID_ALPHA_CONTROL,
		  control | SC1200_VIDEO_LINE_OFFSET_ODD);
   else
      WRITE_VID32(SC1200_VID_ALPHA_CONTROL,
		  control & ~SC1200_VIDEO_LINE_OFFSET_ODD);

   /* SET VIDEO POSITION */

   WRITE_VID32(SC1200_VIDEO_X_POS, (xend << 16) | xstart);
   WRITE_VID32(SC1200_VIDEO_Y_POS, (yend << 16) | ystart);

   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_video_left_crop
 * 
 * This routine sets the number of pixels which will be cropped from the
 * beginning of each video line. The video window will begin to display only
 * from the pixel following the cropped pixels, and the cropped pixels
 * will be ignored.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_left_crop(unsigned short x)
#else
int
gfx_set_video_left_crop(unsigned short x)
#endif
{
   unsigned long vcfg, initread;

   /* CLIPPING ON LEFT */
   /* Adjust initial read for scale, checking for divide by zero */

   if (gfx_vid_dstw)
      initread = (unsigned long)x *gfx_vid_srcw / gfx_vid_dstw;

   else
      initread = 0l;

   /* SET INITIAL READ ADDRESS */

   vcfg = READ_VID32(SC1200_VIDEO_CONFIG);
   vcfg &= ~SC1200_VCFG_INIT_READ_MASK;
   vcfg |= (initread << 15) & SC1200_VCFG_INIT_READ_MASK;
   WRITE_VID32(SC1200_VIDEO_CONFIG, vcfg);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_video_color_key
 * 
 * This routine specifies the color key value and mask for the video overlay
 * hardware. To disable color key, the color and mask should both be set to 
 * zero. The hardware uses the color key in the following equation:
 *
 * ((source data) & (color key mask)) == ((color key) & (color key mask))
 *
 * If "graphics" is set to TRUE, the source data is graphics, and color key
 * is an RGB value. If "graphics" is set to FALSE, the source data is the video,
 * and color key is a YUV value.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_color_key(unsigned long key, unsigned long mask,
			   int graphics)
#else
int
gfx_set_video_color_key(unsigned long key, unsigned long mask, int graphics)
#endif
{
   unsigned long dcfg = 0;

   /* SET SC1200 COLOR KEY VALUE */

   WRITE_VID32(SC1200_VIDEO_COLOR_KEY, key);
   WRITE_VID32(SC1200_VIDEO_COLOR_MASK, mask);

   /* SELECT GRAPHICS OR VIDEO DATA TO COMPARE TO THE COLOR KEY */

   dcfg = READ_VID32(SC1200_DISPLAY_CONFIG);
   if (graphics & 0x01)
      dcfg &= ~SC1200_DCFG_VG_CK;
   else
      dcfg |= SC1200_DCFG_VG_CK;
   WRITE_VID32(SC1200_DISPLAY_CONFIG, dcfg);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_video_filter
 * 
 * This routine enables or disables the video overlay filters.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_filter(int xfilter, int yfilter)
#else
int
gfx_set_video_filter(int xfilter, int yfilter)
#endif
{
   unsigned long vcfg = 0;

   /* ENABLE OR DISABLE SC1200 VIDEO OVERLAY FILTERS */

   vcfg = READ_VID32(SC1200_VIDEO_CONFIG);
   vcfg &= ~(SC1200_VCFG_X_FILTER_EN | SC1200_VCFG_Y_FILTER_EN);
   if (xfilter)
      vcfg |= SC1200_VCFG_X_FILTER_EN;
   if (yfilter)
      vcfg |= SC1200_VCFG_Y_FILTER_EN;
   WRITE_VID32(SC1200_VIDEO_CONFIG, vcfg);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_video_palette
 * 
 * This routine loads the video hardware palette.  If a NULL pointer is 
 * specified, the palette is bypassed (for SC1200, this means loading the 
 * palette with identity values). 
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_palette(unsigned long *palette)
#else
int
gfx_set_video_palette(unsigned long *palette)
#endif
{
   unsigned long i, entry;

   /* WAIT FOR VERTICAL BLANK TO END */
   /* Otherwise palette will not be written properly. */

   if (gfx_test_timing_active()) {
      if (gfx_test_vertical_active()) {
	 while (gfx_test_vertical_active()) ;
      }
      while (!gfx_test_vertical_active()) ;
   }

   /* LOAD SC1200 VIDEO PALETTE */

   WRITE_VID32(SC1200_PALETTE_ADDRESS, 0);
   for (i = 0; i < 256; i++) {
      if (palette)
	 entry = palette[i];
      else
	 entry = (i << 8) | (i << 16) | (i << 24);
      WRITE_VID32(SC1200_PALETTE_DATA, entry);
   }
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_video_palette_entry
 * 
 * This routine loads a single entry of the video hardware palette.  
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_palette_entry(unsigned long index, unsigned long palette)
#else
int
gfx_set_video_palette_entry(unsigned long index, unsigned long palette)
#endif
{
   if (index > 0xFF)
      return GFX_STATUS_BAD_PARAMETER;

   /* WAIT FOR VERTICAL BLANK TO END */
   /* Otherwise palette will not be written properly. */

   if (gfx_test_timing_active()) {
      if (gfx_test_vertical_active()) {
	 while (gfx_test_vertical_active()) ;
      }
      while (!gfx_test_vertical_active()) ;
   }

   /* SET A SINGLE ENTRY */

   WRITE_VID32(SC1200_PALETTE_ADDRESS, index);
   WRITE_VID32(SC1200_PALETTE_DATA, palette);

   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_video_request()
 * 
 * This routine sets the horizontal (pixel) and vertical (line) video request
 * values.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_request(short x, short y)
#else
int
gfx_set_video_request(short x, short y)
#endif
{
   /* SET SC1200 VIDEO REQUEST */

   x += gfx_get_htotal() - gfx_get_hsync_end() - 2;
   y += gfx_get_vtotal() - gfx_get_vsync_end() + 1;

   if ((x < 0) || (x > SC1200_VIDEO_REQUEST_MASK) ||
       (y < 0) || (y > SC1200_VIDEO_REQUEST_MASK))
      return GFX_STATUS_BAD_PARAMETER;

   WRITE_VID32(SC1200_VIDEO_REQUEST,
	       ((unsigned long)x << SC1200_VIDEO_X_REQUEST_POS) |
	       ((unsigned long)y << SC1200_VIDEO_Y_REQUEST_POS));
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_video_source()
 * 
 * This routine sets the video source to either memory or Direct VIP.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_source(VideoSourceType source)
#else
int
gfx_set_video_source(VideoSourceType source)
#endif
{
   unsigned long display_mode;

   display_mode = READ_VID32(SC1200_VIDEO_DISPLAY_MODE);

   /* SET SC1200 VIDEO SOURCE */
   switch (source) {
   case VIDEO_SOURCE_MEMORY:
      WRITE_VID32(SC1200_VIDEO_DISPLAY_MODE,
		  (display_mode & ~SC1200_VIDEO_SOURCE_MASK) |
		  SC1200_VIDEO_SOURCE_GX1);
      break;
   case VIDEO_SOURCE_DVIP:
      WRITE_VID32(SC1200_VIDEO_DISPLAY_MODE,
		  (display_mode & ~SC1200_VIDEO_SOURCE_MASK) |
		  SC1200_VIDEO_SOURCE_DVIP);
      break;
   default:
      return GFX_STATUS_BAD_PARAMETER;
   }
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_vbi_source()
 * 
 * This routine sets the vbi source to either memory or Direct VIP.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_vbi_source(VbiSourceType source)
#else
int
gfx_set_vbi_source(VbiSourceType source)
#endif
{
   unsigned long display_mode;

   display_mode = READ_VID32(SC1200_VIDEO_DISPLAY_MODE);

   /* SET SC1200 VBI SOURCE */
   switch (source) {
   case VBI_SOURCE_MEMORY:
      WRITE_VID32(SC1200_VIDEO_DISPLAY_MODE,
		  (display_mode & ~SC1200_VBI_SOURCE_MASK) |
		  SC1200_VBI_SOURCE_GX1);
      break;
   case VBI_SOURCE_DVIP:
      WRITE_VID32(SC1200_VIDEO_DISPLAY_MODE,
		  (display_mode & ~SC1200_VBI_SOURCE_MASK) |
		  SC1200_VBI_SOURCE_DVIP);
      break;
   default:
      return GFX_STATUS_BAD_PARAMETER;
   }
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_vbi_lines()
 * 
 * This routine sets the VBI lines to pass to the TV encoder.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_vbi_lines(unsigned long even, unsigned long odd)
#else
int
gfx_set_vbi_lines(unsigned long even, unsigned long odd)
#endif
{
   /* SET SC1200 VBI LINES */
   WRITE_VID32(SC1200_VIDEO_EVEN_VBI_LINE_ENABLE,
	       even & SC1200_VIDEO_VBI_LINE_ENABLE_MASK);
   WRITE_VID32(SC1200_VIDEO_ODD_VBI_LINE_ENABLE,
	       odd & SC1200_VIDEO_VBI_LINE_ENABLE_MASK);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_vbi_total()
 * 
 * This routine sets the total number of VBI bytes for each field.
 * The total is needed when both VBI and active video are received from memory.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_vbi_total(unsigned long even, unsigned long odd)
#else
int
gfx_set_vbi_total(unsigned long even, unsigned long odd)
#endif
{
   /* SET SC1200 VBI TOTAL */
   WRITE_VID32(SC1200_VIDEO_EVEN_VBI_TOTAL_COUNT,
	       even & SC1200_VIDEO_VBI_TOTAL_COUNT_MASK);
   WRITE_VID32(SC1200_VIDEO_ODD_VBI_TOTAL_COUNT,
	       odd & SC1200_VIDEO_VBI_TOTAL_COUNT_MASK);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_video_interlaced()
 * 
 * This routine configures the video processor video overlay mode to be
 * interlaced YUV.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_interlaced(int enable)
#else
int
gfx_set_video_interlaced(int enable)
#endif
{
   unsigned long control;

   control = READ_VID32(SC1200_VID_ALPHA_CONTROL);
   /* SET INTERLACED VIDEO */
   if (enable)
      WRITE_VID32(SC1200_VID_ALPHA_CONTROL,
		  control | SC1200_VIDEO_IS_INTERLACED);
   else
      WRITE_VID32(SC1200_VID_ALPHA_CONTROL,
		  control & ~SC1200_VIDEO_IS_INTERLACED);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_color_space_YUV()
 * 
 * This routine configures the video processor to process graphics and video
 * in either YUV or RGB color space. The mode should be set to tune image
 * quality.
 * Setting "enable" to TRUE improves image quality on TV,
 * but in this mode colors on CRT will not be correct.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_color_space_YUV(int enable)
#else
int
gfx_set_color_space_YUV(int enable)
#endif
{
   unsigned long control;

   control = READ_VID32(SC1200_VID_ALPHA_CONTROL);

   /* SET SC1200 VIDEO COLOR SPACE TO YUV OR RGB */

   if (enable) {
      /* ENABLE YUV BLENDING */
      /* YUV blending cannot be enabled in RGB video formats */

      control |= SC1200_CSC_GFX_RGB_TO_YUV;	/* Convert graphics to YUV */
      control &= ~SC1200_CSC_VIDEO_YUV_TO_RGB;	/* Leave video in YUV      */

      if (control & SC1200_VIDEO_INPUT_IS_RGB)
	 return (GFX_STATUS_UNSUPPORTED);	/* Can't convert video from RGB to YUV */
   } else {
      /* RGB BLENDING */

      control &= ~SC1200_CSC_GFX_RGB_TO_YUV;	/* Leave graphics in RGB */
      if (control & SC1200_VIDEO_INPUT_IS_RGB)
	 control &= ~SC1200_CSC_VIDEO_YUV_TO_RGB;	/* Leave video in RGB */
      else
	 control |= SC1200_CSC_VIDEO_YUV_TO_RGB;	/* Convert video to RGB */
   }
   WRITE_VID32(SC1200_VID_ALPHA_CONTROL, control);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_vertical_scaler_offset()
 * 
 * This routine sets the value by which the odd frame is shifted with respect
 * to the even frame. This is useful for de-interlacing in Bob method, by
 * setting the shift value to be one line.
 * If offset is 0, no shifting occurs.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_vertical_scaler_offset(char offset)
#else
int
gfx_set_vertical_scaler_offset(char offset)
#endif
{
   unsigned long control;

   control = READ_VID32(SC1200_VID_ALPHA_CONTROL);
   if (offset == 1) {
      control &= ~SC1200_VERTICAL_SCALER_SHIFT_MASK;	/* Clear shifting value */
      control |= SC1200_VERTICAL_SCALER_SHIFT_INIT;	/* Set shifting value */
      control |= SC1200_VERTICAL_SCALER_SHIFT_EN;	/* Enable odd frame shifting */
   } else if (offset == 0) {
      control &= ~SC1200_VERTICAL_SCALER_SHIFT_EN;	/* No shifting occurs */
      control &= ~SC1200_VERTICAL_SCALER_SHIFT_MASK;	/* Clear shifting value */
   } else
      return (GFX_STATUS_BAD_PARAMETER);	/* TODO: how to program other values ? */
   WRITE_VID32(SC1200_VID_ALPHA_CONTROL, control);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_top_line_in_odd()
 * 
 * This routine sets the field in which the top line of input video resides.
 * If enable is "0", this is the even field (default). [not to be confused
 * with the odd field being the top field on TV].
 * If enable is "1", this is the odd field.
 * Use enable "1" for input devices whose field indication is reversed from
 * normal, i.e. an indication of "odd" field is given for even field data,
 * and vice versa.
 * This setting affects the video processor only when it is in either interlaced
 * or Bob (scaler offset active) modes.
  *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_top_line_in_odd(int enable)
#else
int
gfx_set_top_line_in_odd(int enable)
#endif
{
   unsigned long control;

   control = READ_VID32(SC1200_VID_ALPHA_CONTROL);
   if (enable)
      control |= SC1200_TOP_LINE_IN_ODD;	/* Set shifting value */
   else
      control &= ~SC1200_TOP_LINE_IN_ODD;	/* No shifting occurs */
   WRITE_VID32(SC1200_VID_ALPHA_CONTROL, control);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_genlock_delay()
 * 
 * This routine sets the delay between VIP VSYNC and display controller VSYNC.
 * The delay is in 27 MHz clocks.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_genlock_delay(unsigned long delay)
#else
int
gfx_set_genlock_delay(unsigned long delay)
#endif
{
   /* SET SC1200 GENLOCK DELAY */
   WRITE_VID32(SC1200_GENLOCK_DELAY, delay & SC1200_GENLOCK_DELAY_MASK);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_genlock_enable()
 * 
 * This routine sets and configures the genlock according to the flags parameter.
 * Flags value of 0 disables genlock and resets its configuration.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_genlock_enable(int flags)
#else
int
gfx_set_genlock_enable(int flags)
#endif
{
   unsigned long genlock = 0;

   if (flags) {
      /* SET SC1200 GENLOCK CONFIGURATION */
      if (flags & GENLOCK_SINGLE)
	 genlock |= SC1200_GENLOCK_SINGLE_ENABLE;
      if (flags & GENLOCK_FIELD_SYNC)
	 genlock |= SC1200_GENLOCK_FIELD_SYNC_ENABLE;
      if (flags & GENLOCK_CONTINUOUS)
	 genlock |= SC1200_GENLOCK_CONTINUOUS_ENABLE;
      if (flags & GENLOCK_SYNCED_EDGE_FALLING)
	 genlock |= SC1200_GENLOCK_GX_VSYNC_FALLING_EDGE;
      if (flags & GENLOCK_SYNCING_EDGE_FALLING)
	 genlock |= SC1200_GENLOCK_VIP_VSYNC_FALLING_EDGE;
      if (flags & GENLOCK_TIMEOUT)
	 genlock |= SC1200_GENLOCK_TIMEOUT_ENABLE;
      if (flags & GENLOCK_TVENC_RESET_EVEN_FIELD)
	 genlock |= SC1200_GENLOCK_TVENC_RESET_EVEN_FIELD;
      if (flags & GENLOCK_TVENC_RESET_BEFORE_DELAY)
	 genlock |= SC1200_GENLOCK_TVENC_RESET_BEFORE_DELAY;
      if (flags & GENLOCK_TVENC_RESET)
	 genlock |= SC1200_GENLOCK_TVENC_RESET_ENABLE;
      if (flags & GENLOCK_SYNC_TO_TVENC)
	 genlock |= SC1200_GENLOCK_SYNC_TO_TVENC;
   }
   WRITE_VID32(SC1200_GENLOCK, genlock);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_video_cursor()
 * 
 * This routine configures the video hardware cursor.
 * If the "mask"ed bits in the graphics pixel match "key", then either "color1"
 * or "color2" will be used for this pixel, according to the value of bit
 * number "select_color2" of the graphics pixel.
 *
 * key - 24 bit RGB value
 * mask - 24 bit mask
 * color1, color2 - RGB or YUV, depending on the current color space conversion
 * select_color2 - value between 0 to 23
 *
 * To disable match, a "mask" and "key" value of 0xffffff should be set,
 * because the graphics pixels incoming to the video processor have maximum 16
 * bits set (0xF8FCF8).
 *
 * This feature is useful for disabling alpha blending of the cursor.
 * Otherwise cursor image would be blurred (or completely invisible if video
 * alpha is maximum value).
 * Note: the cursor pixel replacements take place both inside and outside the
 * video overlay window.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_video_cursor(unsigned long key, unsigned long mask,
			unsigned short select_color2, unsigned long color1,
			unsigned long color2)
#else
int
gfx_set_video_cursor(unsigned long key, unsigned long mask,
		     unsigned short select_color2, unsigned long color1,
		     unsigned long color2)
#endif
{
   if (select_color2 > SC1200_CURSOR_COLOR_BITS)
      return GFX_STATUS_BAD_PARAMETER;
   key = (key & SC1200_COLOR_MASK) | ((unsigned long)select_color2 <<
				      SC1200_CURSOR_COLOR_KEY_OFFSET_POS);
   WRITE_VID32(SC1200_CURSOR_COLOR_KEY, key);
   WRITE_VID32(SC1200_CURSOR_COLOR_MASK, mask);
   WRITE_VID32(SC1200_CURSOR_COLOR_1, color1);
   WRITE_VID32(SC1200_CURSOR_COLOR_2, color2);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_alpha_enable
 * 
 * This routine enables or disables the currently selected alpha region.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_alpha_enable(int enable)
#else
int
gfx_set_alpha_enable(int enable)
#endif
{
   unsigned long address = 0, value = 0;

   if (gfx_alpha_select > 2)
      return (GFX_STATUS_UNSUPPORTED);
   address = SC1200_ALPHA_CONTROL_1 + ((unsigned long)gfx_alpha_select << 4);
   value = READ_VID32(address);
   if (enable)
      value |= (SC1200_ACTRL_WIN_ENABLE | SC1200_ACTRL_LOAD_ALPHA);
   else
      value &= ~(SC1200_ACTRL_WIN_ENABLE);
   WRITE_VID32(address, value);
   return (GFX_STATUS_OK);
}

/*---------------------------------------------------------------------------
 * gfx_set_alpha_window
 * 
 * This routine sets the size of the currently selected alpha region.
 * Note: "x" and "y" are signed to enable using negative values needed for
 * implementing workarounds of hardware issues.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_alpha_window(short x, short y,
			unsigned short width, unsigned short height)
#else
int
gfx_set_alpha_window(short x, short y,
		     unsigned short width, unsigned short height)
#endif
{
   unsigned long address = 0;

   /* CHECK FOR CLIPPING */

   if ((x + width) > gfx_get_hactive())
      width = gfx_get_hactive() - x;
   if ((y + height) > gfx_get_vactive())
      height = gfx_get_vactive() - y;

   /* ADJUST POSITIONS */

   x += gfx_get_htotal() - gfx_get_hsync_end() - 2;
   y += gfx_get_vtotal() - gfx_get_vsync_end() + 1;

   if (gfx_alpha_select > 2)
      return (GFX_STATUS_UNSUPPORTED);
   address = SC1200_ALPHA_XPOS_1 + ((unsigned long)gfx_alpha_select << 4);

   /* End positions in register are non-inclusive (one more than the actual end) */

   WRITE_VID32(address, (unsigned long)x |
	       ((unsigned long)(x + width) << 16));
   WRITE_VID32(address + 4l, (unsigned long)y |
	       ((unsigned long)(y + height) << 16));
   return (GFX_STATUS_OK);
}

/*---------------------------------------------------------------------------
 * gfx_set_alpha_value
 * 
 * This routine sets the alpha value for the currently selected alpha
 * region.  It also specifies an increment/decrement value for fading.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_alpha_value(unsigned char alpha, char delta)
#else
int
gfx_set_alpha_value(unsigned char alpha, char delta)
#endif
{
   unsigned long address = 0, value = 0;
   unsigned char new_value = 0;
   int loop = 1;

   if (gfx_alpha_select > 2)
      return (GFX_STATUS_UNSUPPORTED);
   address = SC1200_ALPHA_CONTROL_1 + ((unsigned long)gfx_alpha_select << 4);
   value = READ_VID32(address);
   value &= SC1200_ACTRL_WIN_ENABLE;	/* keep only enable bit */
   value |= (unsigned long)alpha;
   value |= (((unsigned long)delta) & 0xff) << 8;
   value |= SC1200_ACTRL_LOAD_ALPHA;
   WRITE_VID32(address, value);

   /* WORKAROUND FOR ISSUE #1187 */
   /* Need to verify that the alpha operation succeeded */

   while (1) {
      /* WAIT FOR VERTICAL BLANK TO END */
      if (gfx_test_timing_active()) {
	 if (gfx_test_vertical_active())
	    while (gfx_test_vertical_active()) ;
	 while (!gfx_test_vertical_active()) ;
      }
      new_value =
	    (unsigned
	     char)((READ_VID32(SC1200_ALPHA_WATCH) >> (gfx_alpha_select << 3))
		   & 0xff);
      if (new_value == alpha)
	 return GFX_STATUS_OK;
      if (++loop > 10)
	 return GFX_STATUS_ERROR;
      WRITE_VID32(address, value);
   }
}

/*---------------------------------------------------------------------------
 * gfx_set_alpha_priority
 * 
 * This routine sets the priority of the currently selected alpha region.
 * A higher value indicates a higher priority.
 * Note: Priority of enabled alpha windows must be different.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_alpha_priority(int priority)
#else
int
gfx_set_alpha_priority(int priority)
#endif
{
   unsigned long pos = 0, value = 0;

   if (priority > 3)
      return (GFX_STATUS_BAD_PARAMETER);
   if (gfx_alpha_select > 2)
      return (GFX_STATUS_UNSUPPORTED);
   value = READ_VID32(SC1200_VID_ALPHA_CONTROL);
   pos = 16 + (gfx_alpha_select << 1);
   value &= ~(0x03l << pos);
   value |= (unsigned long)priority << pos;
   WRITE_VID32(SC1200_VID_ALPHA_CONTROL, value);
   return (GFX_STATUS_OK);
}

/*---------------------------------------------------------------------------
 * gfx_set_alpha_color
 * 
 * This routine sets the color to be displayed inside the currently selected
 * alpha window when there is a color key match (when the alpha color
 * mechanism is enabled).
 * "color" is a 24 bit RGB value (for RGB blending) or YUV value (for YUV blending).
 * In Interlaced YUV blending mode, Y/2 value should be used.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_alpha_color(unsigned long color)
#else
int
gfx_set_alpha_color(unsigned long color)
#endif
{
   unsigned long address = 0;

   if (gfx_alpha_select > 2)
      return (GFX_STATUS_UNSUPPORTED);
   address = SC1200_ALPHA_COLOR_1 + ((unsigned long)gfx_alpha_select << 4);

   /* ONLY 24 VALID BITS */
   color &= 0xffffffl;

   /* KEEP UPPER BYTE UNCHANGED */
   WRITE_VID32(address, (color | (READ_VID32(address) & ~0xffffffl)));
   return (GFX_STATUS_OK);
}

/*---------------------------------------------------------------------------
 * gfx_set_alpha_color_enable
 * 
 * Enable or disable the color mechanism in the alpha window.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_alpha_color_enable(int enable)
#else
int
gfx_set_alpha_color_enable(int enable)
#endif
{
   unsigned long color;
   unsigned long address = 0;

   if (gfx_alpha_select > 2)
      return (GFX_STATUS_UNSUPPORTED);
   address = SC1200_ALPHA_COLOR_1 + ((unsigned long)gfx_alpha_select << 4);
   color = READ_VID32(address);
   if (enable)
      color |= SC1200_ALPHA_COLOR_ENABLE;
   else
      color &= ~SC1200_ALPHA_COLOR_ENABLE;
   WRITE_VID32(address, color);
   return (GFX_STATUS_OK);
}

/*---------------------------------------------------------------------------
 * gfx_set_no_ck_outside_alpha
 * 
 * This function affects where inside the video window color key or chroma
 * key comparison is done:
 * If enable is TRUE, color/chroma key comparison is performed only inside
 * the enabled alpha windows. Outside the (enabled) alpha windows, only video
 * is displayed if color key is used, and only graphics is displayed if chroma
 * key is used.
 * If enable is FALSE, color/chroma key comparison is performed in all the
 * video window area.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_no_ck_outside_alpha(int enable)
#else
int
gfx_set_no_ck_outside_alpha(int enable)
#endif
{
   unsigned long value;

   value = READ_VID32(SC1200_VID_ALPHA_CONTROL);
   if (enable)
      WRITE_VID32(SC1200_VID_ALPHA_CONTROL,
		  value | SC1200_NO_CK_OUTSIDE_ALPHA);
   else
      WRITE_VID32(SC1200_VID_ALPHA_CONTROL,
		  value & ~SC1200_NO_CK_OUTSIDE_ALPHA);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_set_macrovision_enable
 * 
 * This routine enables or disables macrovision on the tv encoder output.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_set_macrovision_enable(int enable)
#else
int
gfx_set_macrovision_enable(int enable)
#endif
{
   if (enable)
      WRITE_VID32(SC1200_TVENC_MV_CONTROL, SC1200_TVENC_MV_ENABLE);
   else
      WRITE_VID32(SC1200_TVENC_MV_CONTROL, 0);
   return (GFX_STATUS_OK);
}

#define SC1200_VIDEO_PCI_44 0x80009444

/*---------------------------------------------------------------------------
 * gfx_disable_softvga
 *
 * Disables SoftVga. This function is only valid with VSA2, Returns 1 if
 * SoftVga can be disabled; 0 if not.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_disable_softvga(void)
#else
int
gfx_disable_softvga(void)
#endif
{
   unsigned long reg_val;

   /* get the current value */
   reg_val = gfx_pci_config_read(SC1200_VIDEO_PCI_44);
   /* setting video PCI register 44 bit 0 to 1 disables SoftVga */
   reg_val |= 0x1;
   gfx_pci_config_write(SC1200_VIDEO_PCI_44, reg_val);

   /* see if we set the bit and return the appropriate value */
   reg_val = gfx_pci_config_read(SC1200_VIDEO_PCI_44);
   if ((reg_val & 0x1) == 0x1)
      return (1);
   else
      return (0);
}

/*---------------------------------------------------------------------------
 * gfx_enable_softvga
 *
 * Enables SoftVga. This function is only valid with VSA2, Returns 1 if
 * SoftVga can be enbled; 0 if not.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_enable_softvga(void)
#else
int
gfx_enable_softvga(void)
#endif
{
   unsigned long reg_val;

   /* get the current value */
   reg_val = gfx_pci_config_read(SC1200_VIDEO_PCI_44);
   /* clearing video PCI register 44 bit 0 enables SoftVga */
   gfx_pci_config_write(SC1200_VIDEO_PCI_44, reg_val & 0xfffffffel);

   /* see if we cleared the bit and return the appropriate value */
   reg_val = gfx_pci_config_read(SC1200_VIDEO_PCI_44);
   if ((reg_val & 0x1) == 0)
      return (1);
   else
      return (0);
}

/*---------------------------------------------------------------------------
 * gfx_get_clock_frequency
 *
 * This routine returns the current clock frequency in 16.16 format.
 * It reads the current register value and finds the match in the table.
 * If no match is found, this routine returns 0.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
unsigned long
sc1200_get_clock_frequency(void)
#else
unsigned long
gfx_get_clock_frequency(void)
#endif
{
   unsigned int index;
   unsigned long value, mask;

   mask = 0x007FFF0F;
   value = READ_VID32(SC1200_VID_CLOCK_SELECT) & mask;
   for (index = 0; index < NUM_SC1200_FREQUENCIES; index++) {
      if ((gfx_sc1200_clock_table[index].clock_select & mask) == value)
	 return (gfx_sc1200_clock_table[index].frequency);
   }
   return (0);
}

/*************************************************************/
/*  READ ROUTINES  |  INCLUDED FOR DIAGNOSTIC PURPOSES ONLY  */
/*************************************************************/

#if GFX_READ_ROUTINES

/*---------------------------------------------------------------------------
 * gfx_get_vsa2_softvga_enable
 * 
 * This function returns the enable status of SoftVGA.  It is valid
 * only if VSAII is present.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_vsa2_softvga_enable(void)
#else
int
gfx_get_vsa2_softvga_enable(void)
#endif
{
   unsigned long reg_val;

   reg_val = gfx_pci_config_read(SC1200_VIDEO_PCI_44);
   if ((reg_val & 0x1) == 0)
      return (1);
   else
      return (0);

}

/*---------------------------------------------------------------------------
 * gfx_get_sync_polarities
 *
 * This routine returns the polarities of the sync pulses:
 *     Bit 0: Set if negative horizontal polarity.
 *     Bit 1: Set if negative vertical polarity.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_sync_polarities(void)
#else
int
gfx_get_sync_polarities(void)
#endif
{
   int polarities = 0;

   if (READ_VID32(SC1200_DISPLAY_CONFIG) & SC1200_DCFG_CRT_HSYNC_POL)
      polarities |= 1;
   if (READ_VID32(SC1200_DISPLAY_CONFIG) & SC1200_DCFG_CRT_VSYNC_POL)
      polarities |= 2;
   return (polarities);
}

/*---------------------------------------------------------------------------
 * gfx_get_video_palette_entry
 *
 * This routine returns a single palette entry.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_video_palette_entry(unsigned long index, unsigned long *palette)
#else
int
gfx_get_video_palette_entry(unsigned long index, unsigned long *palette)
#endif
{
   if (index > 0xFF)
      return GFX_STATUS_BAD_PARAMETER;

   /* READ A SINGLE ENTRY */

   WRITE_VID32(SC1200_PALETTE_ADDRESS, index);
   *palette = READ_VID32(SC1200_PALETTE_DATA);

   return (GFX_STATUS_OK);
}

/*-----------------------------------------------------------------------------
 * gfx_get_video_enable
 *
 * This routine returns the value "one" if video overlay is currently enabled,
 * otherwise it returns the value "zero".
 *-----------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_video_enable(void)
#else
int
gfx_get_video_enable(void)
#endif
{
   if (READ_VID32(SC1200_VIDEO_CONFIG) & SC1200_VCFG_VID_EN)
      return (1);
   return (0);
}

/*-----------------------------------------------------------------------------
 * gfx_get_video_format
 *
 * This routine returns the current video overlay format.
 *-----------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_video_format(void)
#else
int
gfx_get_video_format(void)
#endif
{
   unsigned long ctrl, vcfg;

   ctrl = READ_VID32(SC1200_VID_ALPHA_CONTROL);
   vcfg = READ_VID32(SC1200_VIDEO_CONFIG);

   if (ctrl & SC1200_VIDEO_INPUT_IS_RGB) {
      switch (vcfg & SC1200_VCFG_VID_INP_FORMAT) {
      case SC1200_VCFG_UYVY_FORMAT:
	 return VIDEO_FORMAT_RGB;
      case SC1200_VCFG_Y2YU_FORMAT:
	 return VIDEO_FORMAT_P2M_P2L_P1M_P1L;
      case SC1200_VCFG_YUYV_FORMAT:
	 return VIDEO_FORMAT_P1M_P1L_P2M_P2L;
      case SC1200_VCFG_YVYU_FORMAT:
	 return VIDEO_FORMAT_P1M_P2L_P2M_P1L;
      }
   }

   if (vcfg & SC1200_VCFG_4_2_0_MODE) {
      switch (vcfg & SC1200_VCFG_VID_INP_FORMAT) {
      case SC1200_VCFG_UYVY_FORMAT:
	 return VIDEO_FORMAT_Y0Y1Y2Y3;
      case SC1200_VCFG_Y2YU_FORMAT:
	 return VIDEO_FORMAT_Y3Y2Y1Y0;
      case SC1200_VCFG_YUYV_FORMAT:
	 return VIDEO_FORMAT_Y1Y0Y3Y2;
      case SC1200_VCFG_YVYU_FORMAT:
	 return VIDEO_FORMAT_Y1Y2Y3Y0;
      }
   } else {
      switch (vcfg & SC1200_VCFG_VID_INP_FORMAT) {
      case SC1200_VCFG_UYVY_FORMAT:
	 return VIDEO_FORMAT_UYVY;
      case SC1200_VCFG_Y2YU_FORMAT:
	 return VIDEO_FORMAT_Y2YU;
      case SC1200_VCFG_YUYV_FORMAT:
	 return VIDEO_FORMAT_YUYV;
      case SC1200_VCFG_YVYU_FORMAT:
	 return VIDEO_FORMAT_YVYU;
      }
   }
   return (GFX_STATUS_ERROR);
}

/*-----------------------------------------------------------------------------
 * gfx_get_video_src_size
 *
 * This routine returns the size of the source video overlay buffer.  The 
 * return value is (height << 16) | width.
 *-----------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
unsigned long
sc1200_get_video_src_size(void)
#else
unsigned long
gfx_get_video_src_size(void)
#endif
{
   unsigned long width = 0, height = 0;

   /* DETERMINE SOURCE WIDTH FROM THE SC1200 VIDEO LINE SIZE */

   width = (READ_VID32(SC1200_VIDEO_CONFIG) >> 7) & 0x000001FE;
   if (READ_VID32(SC1200_VIDEO_CONFIG) & SC1200_VCFG_LINE_SIZE_UPPER)
      width += 512l;

   if (width) {
      /* DETERMINE HEIGHT BY DIVIDING TOTAL SIZE BY WIDTH */
      /* Get total size from display controller - abtracted. */

      height = gfx_get_display_video_size() / (width << 1);
   }
   return ((height << 16) | width);
}

/*-----------------------------------------------------------------------------
 * gfx_get_video_line_size
 *
 * This routine returns the line size of the source video overlay buffer, in
 * pixels.
 *-----------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
unsigned long
sc1200_get_video_line_size(void)
#else
unsigned long
gfx_get_video_line_size(void)
#endif
{
   unsigned long width = 0;

   /* DETERMINE SOURCE WIDTH FROM THE SC1200 VIDEO LINE SIZE */

   width = (READ_VID32(SC1200_VIDEO_CONFIG) >> 7) & 0x000001FE;
   if (READ_VID32(SC1200_VIDEO_CONFIG) & SC1200_VCFG_LINE_SIZE_UPPER)
      width += 512l;
   return (width);
}

/*-----------------------------------------------------------------------------
 * gfx_get_video_xclip
 *
 * This routine returns the number of bytes clipped on the left side of a
 * video overlay line (skipped at beginning).
 *-----------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
unsigned long
sc1200_get_video_xclip(void)
#else
unsigned long
gfx_get_video_xclip(void)
#endif
{
   unsigned long clip = 0;

   /* DETERMINE SOURCE WIDTH FROM THE SC1200 VIDEO LINE SIZE */

   clip = (READ_VID32(SC1200_VIDEO_CONFIG) >> 14) & 0x000007FC;
   return (clip);
}

/*-----------------------------------------------------------------------------
 * gfx_get_video_offset
 *
 * This routine returns the current offset for the video overlay buffer.
 *-----------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
unsigned long
sc1200_get_video_offset(void)
#else
unsigned long
gfx_get_video_offset(void)
#endif
{
   return (gfx_get_display_video_offset());
}

/*---------------------------------------------------------------------------
 * gfx_get_video_upscale
 * 
 * This routine returns the scale factor for the video overlay window.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
unsigned long
sc1200_get_video_upscale(void)
#else
unsigned long
gfx_get_video_upscale(void)
#endif
{
   return (READ_VID32(SC1200_VIDEO_UPSCALE));
}

/*---------------------------------------------------------------------------
 * gfx_get_video_scale
 * 
 * This routine returns the scale factor for the video overlay window.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
unsigned long
sc1200_get_video_scale(void)
#else
unsigned long
gfx_get_video_scale(void)
#endif
{
   return gfx_get_video_upscale();
}

/*---------------------------------------------------------------------------
 * gfx_get_video_downscale_config
 * 
 * This routine returns the current type and value of video downscaling.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_video_downscale_config(unsigned short *type, unsigned short *m)
#else
int
gfx_get_video_downscale_config(unsigned short *type, unsigned short *m)
#endif
{
   unsigned long downscale;

   downscale = READ_VID32(SC1200_VIDEO_DOWNSCALER_CONTROL);
   *m = (unsigned short)((downscale & SC1200_VIDEO_DOWNSCALE_FACTOR_MASK) >>
			 SC1200_VIDEO_DOWNSCALE_FACTOR_POS) + 1;

   switch (downscale & SC1200_VIDEO_DOWNSCALE_TYPE_MASK) {
   case SC1200_VIDEO_DOWNSCALE_TYPE_A:
      *type = VIDEO_DOWNSCALE_KEEP_1_OF;
      break;
   case SC1200_VIDEO_DOWNSCALE_TYPE_B:
      *type = VIDEO_DOWNSCALE_DROP_1_OF;
      break;
   default:
      return GFX_STATUS_ERROR;
      break;
   }
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_get_video_downscale_coefficients
 * 
 * This routine returns the current video downscaling coefficients.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
void
sc1200_get_video_downscale_coefficients(unsigned short *coef1,
					unsigned short *coef2,
					unsigned short *coef3,
					unsigned short *coef4)
#else
void
gfx_get_video_downscale_coefficients(unsigned short *coef1,
				     unsigned short *coef2,
				     unsigned short *coef3,
				     unsigned short *coef4)
#endif
{
   unsigned long coef;

   coef = READ_VID32(SC1200_VIDEO_DOWNSCALER_COEFFICIENTS);
   *coef1 =
	 (unsigned short)((coef >> SC1200_VIDEO_DOWNSCALER_COEF1_POS) &
			  SC1200_VIDEO_DOWNSCALER_COEF_MASK);
   *coef2 =
	 (unsigned short)((coef >> SC1200_VIDEO_DOWNSCALER_COEF2_POS) &
			  SC1200_VIDEO_DOWNSCALER_COEF_MASK);
   *coef3 =
	 (unsigned short)((coef >> SC1200_VIDEO_DOWNSCALER_COEF3_POS) &
			  SC1200_VIDEO_DOWNSCALER_COEF_MASK);
   *coef4 =
	 (unsigned short)((coef >> SC1200_VIDEO_DOWNSCALER_COEF4_POS) &
			  SC1200_VIDEO_DOWNSCALER_COEF_MASK);
   return;
}

/*---------------------------------------------------------------------------
 * gfx_get_video_downscale_enable
 * 
 * This routine returns 1 if video downscaling is currently enabled,
 * or 0 if it is currently disabled.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
void
sc1200_get_video_downscale_enable(int *enable)
#else
void
gfx_get_video_downscale_enable(int *enable)
#endif
{
   if (READ_VID32(SC1200_VIDEO_DOWNSCALER_CONTROL) &
       SC1200_VIDEO_DOWNSCALE_ENABLE)
      *enable = 1;
   else
      *enable = 0;
   return;
}

/*---------------------------------------------------------------------------
 * gfx_get_video_dst_size
 * 
 * This routine returns the size of the displayed video overlay window.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
unsigned long
sc1200_get_video_dst_size(void)
#else
unsigned long
gfx_get_video_dst_size(void)
#endif
{
   unsigned long xsize, ysize;

   xsize = READ_VID32(SC1200_VIDEO_X_POS);
   xsize = ((xsize >> 16) & 0x7FF) - (xsize & 0x7FF);
   ysize = READ_VID32(SC1200_VIDEO_Y_POS);
   ysize = ((ysize >> 16) & 0x7FF) - (ysize & 0x7FF);
   return ((ysize << 16) | xsize);
}

/*---------------------------------------------------------------------------
 * gfx_get_video_position
 * 
 * This routine returns the position of the video overlay window.  The
 * return value is (ypos << 16) | xpos.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
unsigned long
sc1200_get_video_position(void)
#else
unsigned long
gfx_get_video_position(void)
#endif
{
   unsigned long hadjust, vadjust;
   unsigned long xpos, ypos;

   /* READ HARDWARE POSITION */

   xpos = READ_VID32(SC1200_VIDEO_X_POS) & 0x000007FF;
   ypos = READ_VID32(SC1200_VIDEO_Y_POS) & 0x000007FF;

   /* GET ADJUSTMENT VALUES */
   /* Use routines to abstract version of display controller. */

   hadjust =
	 (unsigned long)gfx_get_htotal() -
	 (unsigned long)gfx_get_hsync_end() - 14l;
   vadjust =
	 (unsigned long)gfx_get_vtotal() -
	 (unsigned long)gfx_get_vsync_end() + 1l;
   xpos -= hadjust;
   ypos -= vadjust;
   return ((ypos << 16) | (xpos & 0x0000FFFF));
}

/*---------------------------------------------------------------------------
 * gfx_get_video_color_key
 * 
 * This routine returns the current video color key value.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
unsigned long
sc1200_get_video_color_key(void)
#else
unsigned long
gfx_get_video_color_key(void)
#endif
{
   return (READ_VID32(SC1200_VIDEO_COLOR_KEY));
}

/*---------------------------------------------------------------------------
 * gfx_get_video_color_key_mask
 * 
 * This routine returns the current video color mask value.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
unsigned long
sc1200_get_video_color_key_mask(void)
#else
unsigned long
gfx_get_video_color_key_mask(void)
#endif
{
   return (READ_VID32(SC1200_VIDEO_COLOR_MASK));
}

/*---------------------------------------------------------------------------
 * gfx_get_video_color_key_src
 * 
 * This routine returns 0 for video data compare, 1 for graphics data.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_video_color_key_src(void)
#else
int
gfx_get_video_color_key_src(void)
#endif
{
   if (READ_VID32(SC1200_DISPLAY_CONFIG) & SC1200_DCFG_VG_CK)
      return (0);
   return (1);
}

/*---------------------------------------------------------------------------
 * gfx_get_video_filter
 * 
 * This routine returns if the filters are currently enabled.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_video_filter(void)
#else
int
gfx_get_video_filter(void)
#endif
{
   int retval = 0;

   if (READ_VID32(SC1200_VIDEO_CONFIG) & SC1200_VCFG_X_FILTER_EN)
      retval |= 1;
   if (READ_VID32(SC1200_VIDEO_CONFIG) & SC1200_VCFG_Y_FILTER_EN)
      retval |= 2;
   return (retval);
}

/*---------------------------------------------------------------------------
 * gfx_get_video_request
 * 
 * This routine returns the horizontal (pixel) and vertical (lines) video
 * request values.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_video_request(short *x, short *y)
#else
int
gfx_get_video_request(short *x, short *y)
#endif
{
   int request = 0;

   request = (int)(READ_VID32(SC1200_VIDEO_REQUEST));
   *x = (request >> SC1200_VIDEO_X_REQUEST_POS) & SC1200_VIDEO_REQUEST_MASK;
   *y = (request >> SC1200_VIDEO_Y_REQUEST_POS) & SC1200_VIDEO_REQUEST_MASK;

   *x -= gfx_get_htotal() - gfx_get_hsync_end() - 2;
   *y -= gfx_get_vtotal() - gfx_get_vsync_end() + 1;

   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_get_video_source
 * 
 * This routine returns the current video source.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_video_source(VideoSourceType * source)
#else
int
gfx_get_video_source(VideoSourceType * source)
#endif
{
   switch (READ_VID32(SC1200_VIDEO_DISPLAY_MODE) & SC1200_VIDEO_SOURCE_MASK) {
   case SC1200_VIDEO_SOURCE_GX1:
      *source = VIDEO_SOURCE_MEMORY;
      break;
   case SC1200_VIDEO_SOURCE_DVIP:
      *source = VIDEO_SOURCE_DVIP;
      break;
   default:
      return GFX_STATUS_ERROR;
   }
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_get_vbi_source
 * 
 * This routine returns the current vbi source.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_vbi_source(VbiSourceType * source)
#else
int
gfx_get_vbi_source(VbiSourceType * source)
#endif
{
   switch (READ_VID32(SC1200_VIDEO_DISPLAY_MODE) & SC1200_VBI_SOURCE_MASK) {
   case SC1200_VBI_SOURCE_GX1:
      *source = VBI_SOURCE_MEMORY;
      break;
   case SC1200_VBI_SOURCE_DVIP:
      *source = VBI_SOURCE_DVIP;
      break;
   default:
      return GFX_STATUS_ERROR;
   }
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_get_vbi_lines
 * 
 * This routine returns the VBI lines which are sent to the TV encoder.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
unsigned long
sc1200_get_vbi_lines(int odd)
#else
unsigned long
gfx_get_vbi_lines(int odd)
#endif
{
   if (odd)
      return (READ_VID32(SC1200_VIDEO_ODD_VBI_LINE_ENABLE) &
	      SC1200_VIDEO_VBI_LINE_ENABLE_MASK);
   return (READ_VID32(SC1200_VIDEO_EVEN_VBI_LINE_ENABLE) &
	   SC1200_VIDEO_VBI_LINE_ENABLE_MASK);
}

/*---------------------------------------------------------------------------
 * gfx_get_vbi_total
 * 
 * This routine returns the total number of VBI bytes in the field.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
unsigned long
sc1200_get_vbi_total(int odd)
#else
unsigned long
gfx_get_vbi_total(int odd)
#endif
{
   if (odd)
      return (READ_VID32(SC1200_VIDEO_ODD_VBI_TOTAL_COUNT) &
	      SC1200_VIDEO_VBI_TOTAL_COUNT_MASK);
   return (READ_VID32(SC1200_VIDEO_EVEN_VBI_TOTAL_COUNT) &
	   SC1200_VIDEO_VBI_TOTAL_COUNT_MASK);
}

/*---------------------------------------------------------------------------
 * gfx_get_video_interlaced()
 * 
 * This routine returns "1" if input video is currently in interlaced mode.
 * "0" otherwise.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_video_interlaced(void)
#else
int
gfx_get_video_interlaced(void)
#endif
{
   if (READ_VID32(SC1200_VID_ALPHA_CONTROL) & SC1200_VIDEO_IS_INTERLACED)
      return (1);
   else
      return (0);
}

/*---------------------------------------------------------------------------
 * gfx_get_color_space_YUV()
 * 
 * This routine returns "1" if video processor color space mode is currently
 * YUV. "0" otherwise.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_color_space_YUV(void)
#else
int
gfx_get_color_space_YUV(void)
#endif
{
   unsigned long control;

   control = READ_VID32(SC1200_VID_ALPHA_CONTROL);

   /* IS SC1200 VIDEO COLOR SPACE RGB OR CONVERTED TO RGB */
   if ((control & SC1200_VIDEO_INPUT_IS_RGB)
       || (control & SC1200_CSC_VIDEO_YUV_TO_RGB))
      return (0);
   else
      return (1);
}

/*---------------------------------------------------------------------------
 * gfx_get_vertical_scaler_offset()
 * 
 * This routine sets "offset" to the value by which odd frames are shifted,
 * if insert is enabled, and to 0 if no shifting occurs.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_vertical_scaler_offset(char *offset)
#else
int
gfx_get_vertical_scaler_offset(char *offset)
#endif
{
   unsigned long control;

   control = READ_VID32(SC1200_VID_ALPHA_CONTROL);
   if (control & SC1200_VERTICAL_SCALER_SHIFT_EN) {
      if ((control & SC1200_VERTICAL_SCALER_SHIFT_MASK) ==
	  SC1200_VERTICAL_SCALER_SHIFT_INIT)
	 *offset = 1;
      else
	 return GFX_STATUS_ERROR;	/* TODO: find the interpretation of other values */
   } else
      *offset = 0;
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_get_genlock_delay
 * 
 * This routine returns the genlock delay in 27 MHz clocks.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
unsigned long
sc1200_get_genlock_delay(void)
#else
unsigned long
gfx_get_genlock_delay(void)
#endif
{
   return (READ_VID32(SC1200_GENLOCK_DELAY) & SC1200_GENLOCK_DELAY_MASK);
}

/*---------------------------------------------------------------------------
 * gfx_get_genlock_enable
 * 
 * This routine returns "1" if genlock is currently enabled, "0" otherwise.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_genlock_enable(void)
#else
int
gfx_get_genlock_enable(void)
#endif
{
   if (READ_VID32(SC1200_GENLOCK) &
       (SC1200_GENLOCK_SINGLE_ENABLE | SC1200_GENLOCK_CONTINUOUS_ENABLE))
      return (1);
   else
      return (0);
}

/*---------------------------------------------------------------------------
 * gfx_get_video_cursor()
 * 
 * This routine configures the video hardware cursor.
 * If the "mask"ed bits in the graphics pixel match "key", then either "color1"
 * or "color2" will be used for this pixel, according to the value of the bit
 * in offset "select_color2".
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_video_cursor(unsigned long *key, unsigned long *mask,
			unsigned short *select_color2, unsigned long *color1,
			unsigned short *color2)
#else
int
gfx_get_video_cursor(unsigned long *key, unsigned long *mask,
		     unsigned short *select_color2, unsigned long *color1,
		     unsigned short *color2)
#endif
{
   *select_color2 =
	 (unsigned short)(READ_VID32(SC1200_CURSOR_COLOR_KEY) >>
			  SC1200_CURSOR_COLOR_KEY_OFFSET_POS);
   *key = READ_VID32(SC1200_CURSOR_COLOR_KEY) & SC1200_COLOR_MASK;
   *mask = READ_VID32(SC1200_CURSOR_COLOR_MASK) & SC1200_COLOR_MASK;
   *color1 = READ_VID32(SC1200_CURSOR_COLOR_1) & SC1200_COLOR_MASK;
   *color2 =
	 (unsigned short)(READ_VID32(SC1200_CURSOR_COLOR_2) &
			  SC1200_COLOR_MASK);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_read_crc
 *
 * This routine returns the hardware CRC value, which is used for automated 
 * testing.  The value is like a checksum, but will change if pixels move
 * locations.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
unsigned long
sc1200_read_crc(void)
#else
unsigned long
gfx_read_crc(void)
#endif
{
   unsigned long crc = 0xFFFFFFFF;

   if (gfx_test_timing_active()) {
      /* WAIT UNTIL ACTIVE DISPLAY */

      while (!gfx_test_vertical_active()) ;

      /* RESET CRC DURING ACTIVE DISPLAY */

      WRITE_VID32(SC1200_VID_CRC, 0);
      WRITE_VID32(SC1200_VID_CRC, 1);

      /* WAIT UNTIL NOT ACTIVE, THEN ACTIVE, NOT ACTIVE, THEN ACTIVE */

      while (gfx_test_vertical_active()) ;
      while (!gfx_test_vertical_active()) ;
      while (gfx_test_vertical_active()) ;
      while (!gfx_test_vertical_active()) ;
      crc = READ_VID32(SC1200_VID_CRC) >> 8;
   }
   return (crc);
}

/*-----------------------------------------------------------------------------
 * gfx_get_macrovision_enable
 *
 * This routine returns the value "one" if macrovision currently enabled in the
 * TV encoder, otherwise it returns the value "zero".
 *-----------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
int
sc1200_get_macrovision_enable(void)
#else
int
gfx_get_macrovision_enable(void)
#endif
{
   if (READ_VID32(SC1200_TVENC_MV_CONTROL) == SC1200_TVENC_MV_ENABLE)
      return (1);
   return (0);
}

/*---------------------------------------------------------------------------
 * gfx_get_alpha_enable
 * 
 * This routine returns 1 if the selected alpha window is currently 
 * enabled, or 0 if it is currently disabled.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
void
sc1200_get_alpha_enable(int *enable)
#else
void
gfx_get_alpha_enable(int *enable)
#endif
{
   unsigned long value = 0;

   *enable = 0;
   if (gfx_alpha_select <= 2) {
      value =
	    READ_VID32(SC1200_ALPHA_CONTROL_1 +
		       ((unsigned long)gfx_alpha_select << 4));
      if (value & SC1200_ACTRL_WIN_ENABLE)
	 *enable = 1;
   }
   return;
}

/*---------------------------------------------------------------------------
 * gfx_get_alpha_size
 * 
 * This routine returns the size of the currently selected alpha region.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
void
sc1200_get_alpha_size(unsigned short *x, unsigned short *y,
		      unsigned short *width, unsigned short *height)
#else
void
gfx_get_alpha_size(unsigned short *x, unsigned short *y,
		   unsigned short *width, unsigned short *height)
#endif
{
   unsigned long value = 0;

   *x = 0;
   *y = 0;
   *width = 0;
   *height = 0;
   if (gfx_alpha_select <= 2) {
      value =
	    READ_VID32(SC1200_ALPHA_XPOS_1 +
		       ((unsigned long)gfx_alpha_select << 4));
      *x = (unsigned short)(value & 0x000007FF);
      *width = (unsigned short)((value >> 16) & 0x000007FF) - *x;
      value =
	    READ_VID32(SC1200_ALPHA_YPOS_1 +
		       ((unsigned long)gfx_alpha_select << 4));
      *y = (unsigned short)(value & 0x000007FF);
      *height = (unsigned short)((value >> 16) & 0x000007FF) - *y;
   }
   *x -= gfx_get_htotal() - gfx_get_hsync_end() - 2;
   *y -= gfx_get_vtotal() - gfx_get_vsync_end() + 1;
   return;
}

/*---------------------------------------------------------------------------
 * gfx_get_alpha_value
 * 
 * This routine returns the alpha value and increment/decrement value of 
 * the currently selected alpha region.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
void
sc1200_get_alpha_value(unsigned char *alpha, char *delta)
#else
void
gfx_get_alpha_value(unsigned char *alpha, char *delta)
#endif
{
   unsigned long value = 0;

   *alpha = 0;
   *delta = 0;
   if (gfx_alpha_select <= 2) {
      value =
	    READ_VID32(SC1200_ALPHA_CONTROL_1 +
		       ((unsigned long)gfx_alpha_select << 4));
      *alpha = (unsigned char)(value & 0x00FF);
      *delta = (char)((value >> 8) & 0x00FF);
   }
   return;
}

/*---------------------------------------------------------------------------
 * gfx_get_alpha_priority
 * 
 * This routine returns the priority of the currently selected alpha region.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
void
sc1200_get_alpha_priority(int *priority)
#else
void
gfx_get_alpha_priority(int *priority)
#endif
{
   unsigned long pos = 0, value = 0;

   *priority = 0;
   if (gfx_alpha_select <= 2) {
      value = READ_VID32(SC1200_VID_ALPHA_CONTROL);
      pos = 16 + (gfx_alpha_select << 1);
      *priority = (int)((value >> pos) & 3);
   }
   return;
}

/*---------------------------------------------------------------------------
 * gfx_get_alpha_color
 * 
 * This routine returns the color register value for the currently selected 
 * alpha region.  Bit 24 is set if the color register is enabled.
 *---------------------------------------------------------------------------
 */
#if GFX_VIDEO_DYNAMIC
void
sc1200_get_alpha_color(unsigned long *color)
#else
void
gfx_get_alpha_color(unsigned long *color)
#endif
{
   *color = 0;
   if (gfx_alpha_select <= 2) {
      *color =
	    READ_VID32(SC1200_ALPHA_COLOR_1 +
		       ((unsigned long)gfx_alpha_select << 4));
   }
   return;
}

#endif /* GFX_READ_ROUTINES */

/* END OF FILE */