/*
        Haiku S3 Trio64 driver adapted from the X.org S3 driver.

        Copyright 2001  Ani Joshi <ajoshi@unixbox.com>

        Copyright 2008 Haiku, Inc.  All rights reserved.
        Distributed under the terms of the MIT license.

        Authors:
        Gerald Zajac 2008
*/


#ifndef __TRIO64_H__
#define __TRIO64_H__


// Note that the cursor normally needs only 1024 bytes; however, if 1024 bytes
// are used, some of the Trio64 chips draw a short white horizontal line below
// and to the right of the cursor.  Setting the number of bytes to 2048 solves
// the problem.

#define CURSOR_BYTES    2048            // see comment above


// Command Registers.
#define ADVFUNC_CNTL    0x4ae8
#define SUBSYS_STAT             0x42e8
#define SUBSYS_CNTL             0x42e8
#define CUR_Y                   0x82e8
#define CUR_X                   0x86e8
#define DESTY_AXSTP             0x8ae8
#define DESTX_DIASTP    0x8ee8
#define CUR_WIDTH               0x96e8
#define CMD                             0x9ae8
#define GP_STAT                 0x9ae8
#define FRGD_COLOR              0xa6e8
#define WRT_MASK                0xaae8
#define FRGD_MIX                0xbae8
#define MULTIFUNC_CNTL  0xbee8

// Command register bits.
#define CMD_RECT                0x4000
#define CMD_BITBLT              0xc000
#define INC_Y                   0x0080
#define INC_X                   0x0020
#define DRAW                    0x0010
#define WRTDATA                 0x0001

// Foreground mix register.
#define FSS_FRGDCOL             0x0020
#define FSS_BITBLT              0x0060

#define GP_BUSY                 0x0200

#define SCISSORS_T              0x1000
#define SCISSORS_L              0x2000
#define SCISSORS_B              0x3000
#define SCISSORS_R              0x4000


#endif // __TRIO64_H__