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/* $NetBSD: cgsixreg.h,v 1.4 1996/02/27 22:09:31 thorpej Exp $ */
/*
* 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.
*
* @(#)cgsixreg.h 8.4 (Berkeley) 1/21/94
*/
/*
* 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 / control? register (32 bits)
* DHC - ???
* TEC - transform engine control?
* THC - TEC Hardware Configuration
* 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).
*
* Various revisions of the cgsix have various hardware bugs. So far,
* we have only seen rev 1 & 2.
*/
/* offsets */
#define CGSIX_FHC_OFFSET 0x300000
/* bits in FHC register */
#define FHC_FBID_MASK 0xff000000 /* bits 24..31 are frame buffer ID */
#define FHC_FBID_SHIFT 24
#define FHC_REV_MASK 0x00f00000 /* bits 20..23 are revision */
#define FHC_REV_SHIFT 20
#define FHC_FROP_DISABLE 0x00080000 /* disable fast/font? rasterops */
#define FHC_ROW_DISABLE 0x00040000 /* ??? */
#define FHC_SRC_DISABLE 0x00020000 /* ??? */
#define FHC_DST_DISABLE 0x00010000 /* disable destination cache */
#define FHC_RESET 0x00008000 /* ??? */
#define FHC_XXX0 0x00004000 /* ??? */
#define FHC_LEBO 0x00002000 /* set little endian byte order? */
#define FHC_RES_MASK 0x00001800 /* bits 11&12 are resolution */
#define FHC_RES_1024 0x00000000 /* res = 1024x768 */
#define FHC_RES_1152 0x00000800 /* res = 1152x900 */
#define FHC_RES_1280 0x00001000 /* res = 1280x1024 */
#define FHC_RES_1600 0x00001800 /* res = 1600x1200 */
#define FHC_CPU_MASK 0x00000600 /* bits 9&10 are cpu type */
#define FHC_CPU_SPARC 0x00000000 /* cpu = sparc */
#define FHC_CPU_68020 0x00000200 /* cpu = 68020 */
#define FHC_CPU_386 0x00000400 /* cpu = 80386 */
#define FHC_CPU_XXX 0x00000600 /* ??? */
#define FHC_TEST 0x00000100 /* ??? test window ??? */
#define FHC_TESTX_MASK 0x000000f0 /* bits 4..7 are test window X */
#define FHC_TESTX_SHIFT 4
#define FHC_TESTY_MASK 0x0000000f /* bits 0..3 are test window Y */
#define FHC_TESTY_SHIFT 0
/*
* 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 */
/*
* Partial description of TEC (needed to get around FHC rev 1 bugs).
*/
struct cg6_tec_xxx {
u_int tec_mv; /* matrix stuff */
u_int tec_clip; /* clipping stuff */
u_int tec_vdc; /* ??? */
};
/*
* 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 register at 0x300000 */
union {
int un_fhc;
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];
struct cg6_tec_xxx un_tec;
} cg6_tec_un;
/* Video RAM at 0x800000 */
char cg6_ram[1024 * 1024]; /* approx.? */
};
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