/*
 * Copyright 2007-2010 Haiku, Inc.  All rights reserved.
 * Distributed under the terms of the MIT license.
 *
 * Authors:
 *              Gerald Zajac
 */

#ifndef _ACCELERANT_H
#define _ACCELERANT_H

#include "DriverInterface.h"



#undef TRACE

#ifdef ENABLE_DEBUG_TRACE
extern "C" void  _sPrintf(const char* format, ...);
#       define TRACE(x...) _sPrintf("3dfx: " x)
#else
#       define TRACE(x...) ;
#endif


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


// Global data used by various source files of the accelerant.

struct AccelerantInfo {
        int                     deviceFileDesc;         // file descriptor of kernel driver

        SharedInfo*     sharedInfo;                     // address of info shared between 
                                                                        // accelerants & driver
        area_id         sharedInfoArea;         // shared info area ID

        uint8*          regs;                           // base address of MMIO register area
        area_id         regsArea;                       // MMIO register area ID

        display_mode* modeList;                 // list of standard display modes
        area_id         modeListArea;           // mode list area ID

        bool            bAccelerantIsClone;     // true if this is a cloned accelerant
};

extern AccelerantInfo gInfo;


// Prototypes of the interface functions called by the app_server.  Note that
// the functions that are unique to a particular chip family, will be prefixed
// with the name of the family, and the functions that are applicable to all
// chips will have no prefix.
//================================================================

#if defined(__cplusplus)
extern "C" {
#endif

// General
status_t InitAccelerant(int fd);
ssize_t  AccelerantCloneInfoSize(void);
void     GetAccelerantCloneInfo(void* data);
status_t CloneAccelerant(void* data);
void     UninitAccelerant(void);
status_t GetAccelerantDeviceInfo(accelerant_device_info* adi);

// Mode Configuration
uint32   AccelerantModeCount(void);
status_t GetModeList(display_mode* dm);
status_t ProposeDisplayMode(display_mode* target, const display_mode* low,
                        const display_mode* high);
status_t SetDisplayMode(display_mode* mode_to_set);
status_t GetDisplayMode(display_mode* current_mode);
status_t GetFrameBufferConfig(frame_buffer_config* a_frame_buffer);
status_t GetPixelClockLimits(display_mode* dm, uint32* low, uint32* high);
status_t MoveDisplay(uint16 h_display_start, uint16 v_display_start);
void     TDFX_SetIndexedColors(uint count, uint8 first, uint8* color_data,
                        uint32 flags);
status_t GetEdidInfo(void* info, size_t size, uint32* _version);

// DPMS
uint32   TDFX_DPMSCapabilities(void);
uint32   TDFX_GetDPMSMode(void);
status_t TDFX_SetDPMSMode(uint32 dpms_flags);

// Cursor
status_t SetCursorShape(uint16 width, uint16 height, uint16 hot_x, uint16 hot_y,
                        uint8* andMask, uint8* xorMask);
void     MoveCursor(uint16 x, uint16 y);
void     TDFX_ShowCursor(bool bShow);

// Engine Management
uint32   AccelerantEngineCount(void);
status_t AcquireEngine(uint32 capabilities, uint32 max_wait, sync_token* st,
                        engine_token** et);
status_t ReleaseEngine(engine_token* et, sync_token* st);
void     WaitEngineIdle(void);
status_t GetSyncToken(engine_token* et, sync_token* st);
status_t SyncToToken(sync_token* st);

// 2D acceleration
void     TDFX_FillRectangle(engine_token* et, uint32 color,
                        fill_rect_params* list, uint32 count);
void     TDFX_FillSpan(engine_token* et, uint32 color, uint16* list, 
                        uint32 count);
void     TDFX_InvertRectangle(engine_token* et, fill_rect_params* list, 
                        uint32 count);
void     TDFX_ScreenToScreenBlit(engine_token* et, blit_params* list, 
                        uint32 count);

// Video_overlay
uint32          OverlayCount(const display_mode* dm);
const uint32* OverlaySupportedSpaces(const display_mode *dm);
uint32          OverlaySupportedFeatures(uint32 a_color_space);
const overlay_buffer* AllocateOverlayBuffer(color_space cs, uint16 width,
                                uint16 height);
status_t        ReleaseOverlayBuffer(const overlay_buffer* ob);
status_t        GetOverlayConstraints(const display_mode* dm,
                                const overlay_buffer* ob, overlay_constraints* oc);
overlay_token AllocateOverlay(void);
status_t        ReleaseOverlay(overlay_token ot);
status_t        ConfigureOverlay(overlay_token ot, const overlay_buffer* ob,
                                const overlay_window* ow, const overlay_view* ov);

#if defined(__cplusplus)
}
#endif



// Prototypes for other functions that are called from source files other than
// where they are defined.
//============================================================================

status_t CreateModeList(bool (*checkMode)(const display_mode* mode));
uint16   GetVesaModeNumber(const display_mode& mode, uint8 bitsPerPixel);
bool     IsModeUsable(const display_mode* mode);

// 3dfx functions.

bool     TDFX_DisplayOverlay(const overlay_window* window,
                        const overlay_buffer* buffer, const overlay_view* view);
void     TDFX_StopOverlay(void);

status_t TDFX_Init(void);
bool     TDFX_GetColorSpaceParams(int colorSpace, uint8& bpp);
bool     TDFX_GetEdidInfo(edid1_info& edidInfo);

void     TDFX_EngineReset(void);
void     TDFX_EngineInit(const DisplayModeEx& mode);

bool     TDFX_LoadCursorImage(int width, int height, uint8* and_mask, 
                        uint8* xor_mask);
void     TDFX_SetCursorPosition(int x, int y);

void     TDFX_AdjustFrame(const DisplayModeEx& mode);
status_t TDFX_SetDisplayMode(const DisplayModeEx& mode);

void     TDFX_WaitForFifo(uint32);
void     TDFX_WaitForIdle();


// Address of various VGA registers.

#define MISC_OUT_R              0x3cc           // read
#define MISC_OUT_W              0x3c2           // write
#define CRTC_INDEX              0x3d4
#define CRTC_DATA               0x3d5
#define SEQ_INDEX               0x3c4
#define SEQ_DATA                0x3c5


// Macros for memory mapped I/O.
//===============================

#define INREG8(addr)            *((vuint8*)(gInfo.regs + addr))
#define INREG16(addr)           *((vuint16*)(gInfo.regs + addr))
#define INREG32(addr)           *((vuint32*)(gInfo.regs + addr))

#define OUTREG8(addr, val)      *((vuint8*)(gInfo.regs + addr)) = val
#define OUTREG16(addr, val)     *((vuint16*)(gInfo.regs + addr)) = val
#define OUTREG32(addr, val)     *((vuint32*)(gInfo.regs + addr)) = val

// Write a value to an 32-bit reg using a mask.  The mask selects the
// bits to be modified.
#define OUTREGM(addr, value, mask)      \
        (OUTREG(addr, (INREG(addr) & ~(mask)) | ((value) & (mask))))


#endif  // _ACCELERANT_H