NetBSD/sys/arch/sparc/dev/cgsixreg.h

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/*
* Copyright (c) 1993 The Regents of the University of California.
* All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* %W% (Berkeley) %G%
*
* from: Header: cgsixreg.h,v 1.1 93/10/12 15:29:24 torek Exp
* $Id: cgsixreg.h,v 1.1 1993/11/11 03:36:54 deraadt Exp $
*/
/*
* CG6 display registers. (Note, I got tired of writing `cgsix' about
* halfway through and changed everything to cg6, but I probably missed
* some. Unfortunately, the way config works, we need to spell out `six'
* in some places anyway.)
*
* The cg6 is a complicated beastie. We have been unable to extract any
* documentation and most of the following are guesses based on a limited
* amount of reverse engineering.
*
* A cg6 is composed of numerous groups of control registers, all with TLAs:
* FBC - frame buffer control?
* FHC - fbc hardware configuration?
* DHC - ???
* TEC - transform engine control?
* THC - TEC Hardware Configuration (this is where our action goes)
* ROM - a 64Kbyte ROM with who knows what in it.
* colormap - see below
* frame buffer memory (video RAM)
* possible other stuff
*
* Like the cg3, the cg6 uses a Brooktree Video DAC (see btreg.h).
*/
/*
* The layout of the THC.
*/
struct cg6_thc {
u_int thc_xxx0[512]; /* ??? */
u_int thc_hsync1; /* horizontal sync timing */
u_int thc_hsync2; /* more hsync timing */
u_int thc_hsync3; /* yet more hsync timing */
u_int thc_vsync1; /* vertical sync timing */
u_int thc_vsync2; /* only two of these */
u_int thc_refresh; /* refresh counter */
u_int thc_misc; /* miscellaneous control & status */
u_int thc_xxx1[56]; /* ??? */
u_int thc_cursxy; /* cursor x,y position (16 bits each) */
u_int thc_cursmask[32]; /* cursor mask bits */
u_int thc_cursbits[32]; /* what to show where mask enabled */
};
/* bits in thc_misc */
#define THC_MISC_XXX0 0xfff00000 /* unused */
#define THC_MISC_REVMASK 0x000f0000 /* cg6 revision? */
#define THC_MISC_REVSHIFT 16
#define THC_MISC_XXX1 0x0000e000 /* 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_XXX 0x0000000f /* ??? */
/* cursor x / y position value for `off' */
#define THC_CURSOFF (65536-32) /* i.e., USHRT_MAX+1-32 */
/*
* This structure exists only to compute the layout of the CG6
* hardware. Each of the individual substructures lives on a
* separate `page' (where a `page' is at least 4K), and many are
* very far apart. We avoid large offsets (which make for lousy
* code) by using pointers to the individual interesting pieces,
* and map them in independently (to avoid using up PTEs unnecessarily).
*/
struct cg6_layout {
/* ROM at 0 */
union {
long un_id; /* ID = ?? */
char un_rom[65536]; /* 64K rom */
char un_pad[0x200000];
} cg6_rom_un;
/* Brooktree DAC at 0x200000 */
union {
struct bt_regs un_btregs;
char un_pad[0x040000];
} cg6_bt_un;
/* DHC, whatever that is, at 0x240000 */
union {
char un_pad[0x40000];
} cg6_dhc_un;
/* ALT, whatever that is, at 0x280000 */
union {
char un_pad[0x80000];
} cg6_alt_un;
/* FHC, whatever that is, at 0x300000 */
union {
char un_pad[0x1000];
} cg6_fhc_un;
/* THC at 0x301000 */
union {
struct cg6_thc un_thc;
char un_pad[0x400000 - 0x1000];
} cg6_thc_un;
/* FBC at 0x700000 */
union {
char un_pad[0x1000];
} cg6_fbc_un;
/* TEC at 0x701000 */
union {
char un_pad[0x100000 - 0x1000];
} cg6_tec_un;
/* Video RAM at 0x800000 */
char cg6_ram[1024 * 1024]; /* approx.? */
};