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/* $OpenBSD: bt445reg.h,v 1.1 2003/06/17 21:21:31 miod Exp $ */
/*
* Copyright (c) 2003, Miodrag Vallat.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* Actual BT445 register layout
*/
/* Read/write address */
#define BT445_ADDRESS 0
/*
* Access to a register is done by programming the address register with
* the low 8 bits, and then reading or writing at the register pointed out
* by the high 8 bits.
*/
#define BT445_REGISTER_OFFSET(x) ((x) & 0xff)
#define BT445_REGISTER_INDEX(x) (((x) >> 8) & 0xff)
/* Palette data - 3 r/w cycles par address, and autoincrement */
#define BT445_PALDATA 1
/* Overlay palette data - 3 r/w cycles par address, and autoincrement */
#define BT445_OVPALDATA 3
/*
* Various registers (very incomplete...)
*/
#define BT445_ID 0x0200
#define BT445_REVISION 0x0201
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