nkeynes@31: /**
nkeynes@94:  * $Id: pvr2.c,v 1.14 2006-02-05 04:05:27 nkeynes Exp $
nkeynes@31:  *
nkeynes@31:  * PVR2 (Video) MMIO and supporting functions.
nkeynes@31:  *
nkeynes@31:  * Copyright (c) 2005 Nathan Keynes.
nkeynes@31:  *
nkeynes@31:  * This program is free software; you can redistribute it and/or modify
nkeynes@31:  * it under the terms of the GNU General Public License as published by
nkeynes@31:  * the Free Software Foundation; either version 2 of the License, or
nkeynes@31:  * (at your option) any later version.
nkeynes@31:  *
nkeynes@31:  * This program is distributed in the hope that it will be useful,
nkeynes@31:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
nkeynes@31:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nkeynes@31:  * GNU General Public License for more details.
nkeynes@31:  */
nkeynes@35: #define MODULE pvr2_module
nkeynes@31: 
nkeynes@1: #include "dream.h"
nkeynes@1: #include "video.h"
nkeynes@1: #include "mem.h"
nkeynes@1: #include "asic.h"
nkeynes@1: #include "pvr2.h"
nkeynes@56: #include "sh4/sh4core.h"
nkeynes@1: #define MMIO_IMPL
nkeynes@1: #include "pvr2.h"
nkeynes@1: 
nkeynes@1: char *video_base;
nkeynes@1: 
nkeynes@15: void pvr2_init( void );
nkeynes@30: uint32_t pvr2_run_slice( uint32_t );
nkeynes@94: void pvr2_display_frame( void );
nkeynes@94: 
nkeynes@94: video_driver_t video_driver = NULL;
nkeynes@94: struct video_buffer video_buffer[2];
nkeynes@94: int video_buffer_idx = 0;
nkeynes@15: 
nkeynes@23: struct dreamcast_module pvr2_module = { "PVR2", pvr2_init, NULL, NULL, 
nkeynes@23: 					pvr2_run_slice, NULL,
nkeynes@15: 					NULL, NULL };
nkeynes@15: 
nkeynes@1: void pvr2_init( void )
nkeynes@1: {
nkeynes@1:     register_io_region( &mmio_region_PVR2 );
nkeynes@85:     register_io_region( &mmio_region_PVR2PAL );
nkeynes@56:     register_io_region( &mmio_region_PVR2TA );
nkeynes@1:     video_base = mem_get_region_by_name( MEM_REGION_VIDEO );
nkeynes@94:     video_driver = &video_gtk_driver;
nkeynes@1: }
nkeynes@1: 
nkeynes@23: uint32_t pvr2_time_counter = 0;
nkeynes@94: uint32_t pvr2_frame_counter = 0;
nkeynes@30: uint32_t pvr2_time_per_frame = 20000000;
nkeynes@23: 
nkeynes@30: uint32_t pvr2_run_slice( uint32_t nanosecs ) 
nkeynes@23: {
nkeynes@30:     pvr2_time_counter += nanosecs;
nkeynes@30:     while( pvr2_time_counter >= pvr2_time_per_frame ) {
nkeynes@94: 	pvr2_display_frame();
nkeynes@23: 	pvr2_time_counter -= pvr2_time_per_frame;
nkeynes@23:     }
nkeynes@30:     return nanosecs;
nkeynes@23: }
nkeynes@23: 
nkeynes@1: uint32_t vid_stride, vid_lpf, vid_ppl, vid_hres, vid_vres, vid_col;
nkeynes@1: int interlaced, bChanged = 1, bEnabled = 0, vid_size = 0;
nkeynes@1: char *frame_start; /* current video start address (in real memory) */
nkeynes@1: 
nkeynes@1: /*
nkeynes@1:  * Display the next frame, copying the current contents of video ram to
nkeynes@1:  * the window. If the video configuration has changed, first recompute the
nkeynes@1:  * new frame size/depth.
nkeynes@1:  */
nkeynes@94: void pvr2_display_frame( void )
nkeynes@1: {
nkeynes@94:     int dispsize = MMIO_READ( PVR2, DISPSIZE );
nkeynes@94:     int dispmode = MMIO_READ( PVR2, DISPMODE );
nkeynes@94:     int vidcfg = MMIO_READ( PVR2, VIDCFG );
nkeynes@94:     int vid_stride = ((dispsize & DISPSIZE_MODULO) >> 20) - 1;
nkeynes@94:     int vid_lpf = ((dispsize & DISPSIZE_LPF) >> 10) + 1;
nkeynes@94:     int vid_ppl = ((dispsize & DISPSIZE_PPL)) + 1;
nkeynes@94:     gboolean bEnabled = (dispmode & DISPMODE_DE) && (vidcfg & VIDCFG_VO ) ? TRUE : FALSE;
nkeynes@94:     gboolean interlaced = (vidcfg & VIDCFG_I ? TRUE : FALSE);
nkeynes@1:     if( bEnabled ) {
nkeynes@94: 	video_buffer_t buffer = &video_buffer[video_buffer_idx];
nkeynes@94: 	video_buffer_idx = !video_buffer_idx;
nkeynes@94: 	video_buffer_t last = &video_buffer[video_buffer_idx];
nkeynes@94: 	buffer->colour_format = (dispmode & DISPMODE_COL);
nkeynes@94: 	buffer->rowstride = (vid_ppl + vid_stride) << 2;
nkeynes@94: 	buffer->data = frame_start = video_base + MMIO_READ( PVR2, DISPADDR1 );
nkeynes@94: 	buffer->vres = vid_lpf;
nkeynes@94: 	if( interlaced ) buffer->vres <<= 1;
nkeynes@94: 	switch( buffer->colour_format ) {
nkeynes@94: 	case COLFMT_RGB15:
nkeynes@94: 	case COLFMT_RGB16: buffer->hres = vid_ppl << 1; break;
nkeynes@94: 	case COLFMT_RGB24: buffer->hres = (vid_ppl << 2) / 3; break;
nkeynes@94: 	case COLFMT_RGB32: buffer->hres = vid_ppl; break;
nkeynes@94: 	}
nkeynes@94: 	
nkeynes@94: 	if( video_driver != NULL ) {
nkeynes@94: 	    if( buffer->hres != last->hres ||
nkeynes@94: 		buffer->vres != last->vres ||
nkeynes@94: 		buffer->colour_format != last->colour_format) {
nkeynes@94: 		video_driver->set_output_format( buffer->hres, buffer->vres,
nkeynes@94: 						 buffer->colour_format );
nkeynes@94: 	    }
nkeynes@94: 	    if( MMIO_READ( PVR2, VIDCFG2 ) & 0x08 ) { /* Blanked */
nkeynes@94: 		uint32_t colour = MMIO_READ( PVR2, BORDERCOL );
nkeynes@94: 		video_driver->display_blank_frame( colour );
nkeynes@94: 	    } else {
nkeynes@94: 		video_driver->display_frame( buffer );
nkeynes@94: 	    }
nkeynes@65: 	}
nkeynes@1:     } else {
nkeynes@94: 	video_buffer_idx = 0;
nkeynes@94: 	video_buffer[0].hres = video_buffer[0].vres = 0;
nkeynes@1:     }
nkeynes@94:     pvr2_frame_counter++;
nkeynes@1:     asic_event( EVENT_SCANLINE1 );
nkeynes@1:     asic_event( EVENT_SCANLINE2 );
nkeynes@1:     asic_event( EVENT_RETRACE );
nkeynes@1: }
nkeynes@1: 
nkeynes@1: void mmio_region_PVR2_write( uint32_t reg, uint32_t val )
nkeynes@1: {
nkeynes@1:     if( reg >= 0x200 && reg < 0x600 ) { /* Fog table */
nkeynes@1:         MMIO_WRITE( PVR2, reg, val );
nkeynes@1:         /* I don't want to hear about these */
nkeynes@1:         return;
nkeynes@1:     }
nkeynes@1:     
nkeynes@1:     INFO( "PVR2 write to %08X <= %08X [%s: %s]", reg, val, 
nkeynes@1:           MMIO_REGID(PVR2,reg), MMIO_REGDESC(PVR2,reg) );
nkeynes@1:    
nkeynes@1:     switch(reg) {
nkeynes@65:     case RENDSTART:
nkeynes@65: 	if( val == 0xFFFFFFFF )
nkeynes@65: 	    pvr2_render_scene();
nkeynes@65: 	break;
nkeynes@1:     }
nkeynes@1:     MMIO_WRITE( PVR2, reg, val );
nkeynes@1: }
nkeynes@1: 
nkeynes@1: MMIO_REGION_READ_FN( PVR2, reg )
nkeynes@1: {
nkeynes@1:     switch( reg ) {
nkeynes@1:         case BEAMPOS:
nkeynes@2:             return sh4r.icount&0x20 ? 0x2000 : 1;
nkeynes@1:         default:
nkeynes@1:             return MMIO_READ( PVR2, reg );
nkeynes@1:     }
nkeynes@1: }
nkeynes@19: 
nkeynes@85: MMIO_REGION_DEFFNS( PVR2PAL )
nkeynes@85: 
nkeynes@19: void pvr2_set_base_address( uint32_t base ) 
nkeynes@19: {
nkeynes@19:     mmio_region_PVR2_write( DISPADDR1, base );
nkeynes@19: }
nkeynes@56: 
nkeynes@56: 
nkeynes@65: void pvr2_render_scene( void )
nkeynes@65: {
nkeynes@65:     /* Actual rendering goes here :) */
nkeynes@65:     asic_event( EVENT_PVR_RENDER_DONE );
nkeynes@94:     DEBUG( "Rendered frame %d", pvr2_frame_counter );
nkeynes@65: }
nkeynes@65: 
nkeynes@65: /** Tile Accelerator */
nkeynes@65: 
nkeynes@65: struct tacmd {
nkeynes@65:     uint32_t command;
nkeynes@65:     uint32_t param1;
nkeynes@65:     uint32_t param2;
nkeynes@65:     uint32_t texture;
nkeynes@65:     float alpha;
nkeynes@65:     float red;
nkeynes@65:     float green;
nkeynes@65:     float blue;
nkeynes@65: };
nkeynes@65: 
nkeynes@56: int32_t mmio_region_PVR2TA_read( uint32_t reg )
nkeynes@56: {
nkeynes@56:     return 0xFFFFFFFF;
nkeynes@56: }
nkeynes@56: 
nkeynes@56: char pvr2ta_remainder[8];
nkeynes@56: 
nkeynes@56: void mmio_region_PVR2TA_write( uint32_t reg, uint32_t val )
nkeynes@56: {
nkeynes@65:     DEBUG( "Direct write to TA %08X", val );
nkeynes@56: }
nkeynes@56: 
nkeynes@85: unsigned int pvr2_last_poly_type = 0;
nkeynes@85: 
nkeynes@56: void pvr2ta_write( char *buf, uint32_t length )
nkeynes@56: {
nkeynes@65:     int i;
nkeynes@65:     struct tacmd *cmd_list = (struct tacmd *)buf;
nkeynes@65:     int count = length >> 5;
nkeynes@65:     for( i=0; i<count; i++ ){
nkeynes@65: 	unsigned int type = (cmd_list[i].command >> 24) & 0xFF;
nkeynes@94: 	DEBUG( "PVR2 cmd: %08X %08X %08X %08X %08X %08X %08X %08X", cmd_list[i].command, cmd_list[i].param1, cmd_list[i].param2, cmd_list[i].texture, cmd_list[i].alpha, cmd_list[i].red, cmd_list[i].green, cmd_list[i].blue );
nkeynes@65: 	if( type == 0 ) {
nkeynes@65: 	    /* End of list */
nkeynes@85: 	    switch( pvr2_last_poly_type ) {
nkeynes@65: 	    case 0x80: /* Opaque polys */
nkeynes@65: 		asic_event( EVENT_PVR_OPAQUE_DONE );
nkeynes@65: 		break;
nkeynes@65: 	    case 0x81: /* Opaque poly modifier */
nkeynes@65: 		asic_event( EVENT_PVR_OPAQUEMOD_DONE );
nkeynes@65: 		break;
nkeynes@65: 	    case 0x82: /* Transparent polys */
nkeynes@65: 		asic_event( EVENT_PVR_TRANS_DONE );
nkeynes@65: 		break;
nkeynes@65: 	    case 0x83: /* Transparent poly modifier */
nkeynes@65: 		asic_event( EVENT_PVR_TRANSMOD_DONE );
nkeynes@65: 		break;
nkeynes@65: 	    case 0x84: /* Punchthrough */
nkeynes@65: 		asic_event( EVENT_PVR_PUNCHOUT_DONE );
nkeynes@65: 		break;
nkeynes@65: 	    }
nkeynes@85: 	    pvr2_last_poly_type = 0;
nkeynes@85: 	} else if( type >= 0x80 && type <= 0x84 ) {
nkeynes@85: 	    pvr2_last_poly_type = type;
nkeynes@65: 	}
nkeynes@65:     }
nkeynes@56: }
nkeynes@65: