text: /*	$NetBSD: tcxreg.h,v 1.1 2000/08/20 22:27:07 pk Exp $ */
  /* 
   *  Copyright (c) 1996 The NetBSD Foundation, Inc.
   *  All rights reserved.
   * 
   *  This code is derived from software contributed to The NetBSD Foundation
   *  by Paul Kranenburg.
   * 
   *  Redistribution and use in source and binary forms, with or without
   *  modification, are permitted provided that the following conditions
   *  are met:
   *  1. Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *  2. Redistributions in binary form must reproduce the above copyright
   *     notice, this list of conditions and the following disclaimer in the
   *     documentation and/or other materials provided with the distribution.
   *  3. All advertising materials mentioning features or use of this software
   *     must display the following acknowledgement:
   *         This product includes software developed by the NetBSD
   *         Foundation, Inc. and its contributors.
   *  4. Neither the name of The NetBSD Foundation nor the names of its
   *     contributors may be used to endorse or promote products derived
   *     from this software without specific prior written permission.
   * 
   *  THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 OR OTHERWISE)
   *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   *  POSSIBILITY OF SUCH DAMAGE.
   */ 
  
  /*
   * A TCX is composed of numerous groups of control registers, all with TLAs:
   *	DHC - ???
   *	TEC - transform engine control?
   *	THC - TEC Hardware Configuration
   *	ROM - a 128Kbyte ROM with who knows what in it.
   *	STIP - ???
   *	RSTIP - Raw ???
   *	BLIT - ???
   *	RBLIT - Raw ???
   *	ALT - ???
   *	colormap - see below
   *	frame buffer memory (video RAM)
   *	possible other stuff
   *
   */
  #define TCX_REG_DFB8	0
  #define TCX_REG_DFB24	1
  #define TCX_REG_STIP	2
  #define TCX_REG_BLIT	3
  #define TCX_REG_RDFB32	4
  #define TCX_REG_RSTIP	5
  #define TCX_REG_RBLIT	6
  #define TCX_REG_TEC	7
  #define TCX_REG_CMAP	8
  #define TCX_REG_THC	9
  #define TCX_REG_ROM	10
  #define TCX_REG_DHC	11
  #define TCX_REG_ALT	12
  
  #define TCX_NREG	13
  
  
  /*
   * The layout of the THC.
   */
  struct tcx_thc {
  	u_int	thc_config;
  	u_int	thc_xxx1[31];
  	u_int	thc_sensebus;
  	u_int	thc_xxx2[3];
  	u_int	thc_delay;
  	u_int	thc_strapping;
  	u_int	thc_xxx3[1];
  	u_int	thc_linecount;
  	u_int	thc_xxx4[478];
  	u_int	thc_hcmisc;
  	u_int	thc_xxx5[56];
  	u_int	thc_cursoraddr;
  	u_int	thc_cursorAdata[32];
  	u_int	thc_cursorBdata[32];
  
  };
  /* bits in thc_config ??? */
  #define THC_CFG_FBID		0xf0000000	/* id mask */
  #define THC_CFG_FBID_SHIFT	28
  #define THC_CFG_SENSE		0x07000000	/* sense mask */
  #define THC_CFG_SENSE_SHIFT	24
  #define THC_CFG_REV		0x00f00000	/* revision mask */
  #define THC_CFG_REV_SHIFT	20
  #define THC_CFG_RST		0x00008000	/* reset */
  
  /* bits in thc_hcmisc */
  #define	THC_MISC_OPENFLG	0x80000000	/* open flag (what's that?) */
  #define	THC_MISC_SWERR_EN	0x20000000	/* enable SW error interrupt */
  #define	THC_MISC_VSYNC_LEVEL	0x08000000	/* vsync level when disabled */
  #define	THC_MISC_HSYNC_LEVEL	0x04000000	/* hsync level when disabled */
  #define	THC_MISC_VSYNC_DISABLE	0x02000000	/* vsync disable */
  #define	THC_MISC_HSYNC_DISABLE	0x01000000	/* hsync disable */
  #define	THC_MISC_XXX1		0x00ffe000	/* unused */
  #define	THC_MISC_RESET		0x00001000	/* ??? */
  #define	THC_MISC_XXX2		0x00000800	/* unused */
  #define	THC_MISC_VIDEN		0x00000400	/* video enable */
  #define	THC_MISC_SYNC		0x00000200	/* not sure what ... */
  #define	THC_MISC_VSYNC		0x00000100	/* ... these really are */
  #define	THC_MISC_SYNCEN		0x00000080	/* sync enable */
  #define	THC_MISC_CURSRES	0x00000040	/* cursor resolution */
  #define	THC_MISC_INTEN		0x00000020	/* v.retrace intr enable */
  #define	THC_MISC_INTR		0x00000010	/* intr pending / ack bit */
  #define	THC_MISC_DACWAIT	0x0000000f	/* ??? */
  
  /*
   * Partial description of TEC.
   */
  struct tcx_tec {
  	u_int	tec_config;	/* what's in it? */
  	u_int	tec_xxx0[35];
  	u_int	tec_delay;	/* */
  #define TEC_DELAY_SYNC		0x00000f00
  #define TEC_DELAY_WR_F		0x000000c0
  #define TEC_DELAY_WR_R		0x00000030
  #define TEC_DELAY_SOE_F		0x0000000c
  #define TEC_DELAY_SOE_S		0x00000003
  	u_int	tec_strapping;	/* */
  #define TEC_STRAP_FIFO_LIMIT	0x00f00000
  #define TEC_STRAP_CACHE_EN	0x00010000
  #define TEC_STRAP_ZERO_OFFSET	0x00008000
  #define TEC_STRAP_REFRSH_DIS	0x00004000
  #define TEC_STRAP_REF_LOAD	0x00001000
  #define TEC_STRAP_REFRSH_PERIOD	0x000003ff
  	u_int	tec_hcmisc;	/* */
  	u_int	tec_linecount;	/* */
  	u_int	tec_hss;	/* */
  	u_int	tec_hse;	/* */
  	u_int	tec_hds;	/* */
  	u_int	tec_hsedvs;	/* */
  	u_int	tec_hde;	/* */
  	u_int	tec_vss;	/* */
  	u_int	tec_vse;	/* */
  	u_int	tec_vds;	/* */
  	u_int	tec_vde;	/* */
  };
  
  