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

        Copyright (C) 1994-1999 The XFree86 Project, Inc.  All Rights Reserved.

        Copyright 2007-2008 Haiku, Inc.  All rights reserved.
        Distributed under the terms of the MIT license.

        Authors:
        Gerald Zajac 2007-2008
*/


#ifndef __VIRGE_H__
#define __VIRGE_H__



#define CURSOR_BYTES    1024            // bytes used for cursor image in video memory

// Miscellaneous registers.
#define SUBSYS_STAT_REG         0x8504
#define SYSTEM_CONTROL_REG      0x83DA
#define DDC_REG                         0xFF20

// Memory port controller registers.
#define FIFO_CONTROL_REG        0x8200

// Image write stuff.
#define SRC_BASE                0xA4D4
#define DEST_BASE               0xA4D8
#define CLIP_L_R                0xA4DC
#define CLIP_T_B                0xA4E0
#define DEST_SRC_STR    0xA4E4
#define MONO_PAT_0              0xA4E8
#define MONO_PAT_1              0xA4EC
#define PAT_BG_CLR              0xA4F0
#define PAT_FG_CLR              0xA4F4
#define CMD_SET                 0xA500
#define RWIDTH_HEIGHT   0xA504
#define RSRC_XY                 0xA508
#define RDEST_XY                0xA50C

// Command Register.
#define CMD_OP_MSK              (0xf << 27)
#define CMD_BITBLT              (0x0 << 27)
#define CMD_RECT                ((0x2 << 27) | 0x0100)
#define CMD_LINE                (0x3 << 27)
#define CMD_POLYFILL    (0x5 << 27)
#define CMD_NOP                 (0xf << 27)

#define DRAW            0x0020

// Destination Color Format.
#define DST_8BPP        0x00
#define DST_16BPP       0x04
#define DST_24BPP       0x08

// X Positive, Y Positive (Bit BLT).
#define CMD_XP          0x02000000
#define CMD_YP          0x04000000


#define IN_SUBSYS_STAT() (ReadReg32(SUBSYS_STAT_REG))


static inline void VerticalRetraceWait()
{
        if (ReadCrtcReg(0x17) & 0x80) {
                int i = 0x10000;
                while ((ReadReg8(SYSTEM_CONTROL_REG) & 0x08) == 0x08 && i--) ;
                i = 0x10000;
                while ((ReadReg8(SYSTEM_CONTROL_REG) & 0x08) == 0x00 && i--) ;
        }
}


#endif // __VIRGE_H__