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lxdream.org :: lxdream/src/pvr2/pvr2.c
lxdream 0.9.1
released Jun 29
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filename src/pvr2/pvr2.c
changeset 94:8d80d9c7cc7d
prev85:71e239d20c5d
next98:7b59bca968e9
author nkeynes
date Sun Feb 05 04:05:27 2006 +0000 (14 years ago)
permissions -rw-r--r--
last change Video code reshuffle to start getting real video happening.
Implement colourspace conversions
Various tweaks
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     1 /**
     2  * $Id: pvr2.c,v 1.14 2006-02-05 04:05:27 nkeynes Exp $
     3  *
     4  * PVR2 (Video) MMIO and supporting functions.
     5  *
     6  * Copyright (c) 2005 Nathan Keynes.
     7  *
     8  * This program is free software; you can redistribute it and/or modify
     9  * it under the terms of the GNU General Public License as published by
    10  * the Free Software Foundation; either version 2 of the License, or
    11  * (at your option) any later version.
    12  *
    13  * This program is distributed in the hope that it will be useful,
    14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    16  * GNU General Public License for more details.
    17  */
    18 #define MODULE pvr2_module
    20 #include "dream.h"
    21 #include "video.h"
    22 #include "mem.h"
    23 #include "asic.h"
    24 #include "pvr2.h"
    25 #include "sh4/sh4core.h"
    26 #define MMIO_IMPL
    27 #include "pvr2.h"
    29 char *video_base;
    31 void pvr2_init( void );
    32 uint32_t pvr2_run_slice( uint32_t );
    33 void pvr2_display_frame( void );
    35 video_driver_t video_driver = NULL;
    36 struct video_buffer video_buffer[2];
    37 int video_buffer_idx = 0;
    39 struct dreamcast_module pvr2_module = { "PVR2", pvr2_init, NULL, NULL, 
    40 					pvr2_run_slice, NULL,
    41 					NULL, NULL };
    43 void pvr2_init( void )
    44 {
    45     register_io_region( &mmio_region_PVR2 );
    46     register_io_region( &mmio_region_PVR2PAL );
    47     register_io_region( &mmio_region_PVR2TA );
    48     video_base = mem_get_region_by_name( MEM_REGION_VIDEO );
    49     video_driver = &video_gtk_driver;
    50 }
    52 uint32_t pvr2_time_counter = 0;
    53 uint32_t pvr2_frame_counter = 0;
    54 uint32_t pvr2_time_per_frame = 20000000;
    56 uint32_t pvr2_run_slice( uint32_t nanosecs ) 
    57 {
    58     pvr2_time_counter += nanosecs;
    59     while( pvr2_time_counter >= pvr2_time_per_frame ) {
    60 	pvr2_display_frame();
    61 	pvr2_time_counter -= pvr2_time_per_frame;
    62     }
    63     return nanosecs;
    64 }
    66 uint32_t vid_stride, vid_lpf, vid_ppl, vid_hres, vid_vres, vid_col;
    67 int interlaced, bChanged = 1, bEnabled = 0, vid_size = 0;
    68 char *frame_start; /* current video start address (in real memory) */
    70 /*
    71  * Display the next frame, copying the current contents of video ram to
    72  * the window. If the video configuration has changed, first recompute the
    73  * new frame size/depth.
    74  */
    75 void pvr2_display_frame( void )
    76 {
    77     int dispsize = MMIO_READ( PVR2, DISPSIZE );
    78     int dispmode = MMIO_READ( PVR2, DISPMODE );
    79     int vidcfg = MMIO_READ( PVR2, VIDCFG );
    80     int vid_stride = ((dispsize & DISPSIZE_MODULO) >> 20) - 1;
    81     int vid_lpf = ((dispsize & DISPSIZE_LPF) >> 10) + 1;
    82     int vid_ppl = ((dispsize & DISPSIZE_PPL)) + 1;
    83     gboolean bEnabled = (dispmode & DISPMODE_DE) && (vidcfg & VIDCFG_VO ) ? TRUE : FALSE;
    84     gboolean interlaced = (vidcfg & VIDCFG_I ? TRUE : FALSE);
    85     if( bEnabled ) {
    86 	video_buffer_t buffer = &video_buffer[video_buffer_idx];
    87 	video_buffer_idx = !video_buffer_idx;
    88 	video_buffer_t last = &video_buffer[video_buffer_idx];
    89 	buffer->colour_format = (dispmode & DISPMODE_COL);
    90 	buffer->rowstride = (vid_ppl + vid_stride) << 2;
    91 	buffer->data = frame_start = video_base + MMIO_READ( PVR2, DISPADDR1 );
    92 	buffer->vres = vid_lpf;
    93 	if( interlaced ) buffer->vres <<= 1;
    94 	switch( buffer->colour_format ) {
    95 	case COLFMT_RGB15:
    96 	case COLFMT_RGB16: buffer->hres = vid_ppl << 1; break;
    97 	case COLFMT_RGB24: buffer->hres = (vid_ppl << 2) / 3; break;
    98 	case COLFMT_RGB32: buffer->hres = vid_ppl; break;
    99 	}
   101 	if( video_driver != NULL ) {
   102 	    if( buffer->hres != last->hres ||
   103 		buffer->vres != last->vres ||
   104 		buffer->colour_format != last->colour_format) {
   105 		video_driver->set_output_format( buffer->hres, buffer->vres,
   106 						 buffer->colour_format );
   107 	    }
   108 	    if( MMIO_READ( PVR2, VIDCFG2 ) & 0x08 ) { /* Blanked */
   109 		uint32_t colour = MMIO_READ( PVR2, BORDERCOL );
   110 		video_driver->display_blank_frame( colour );
   111 	    } else {
   112 		video_driver->display_frame( buffer );
   113 	    }
   114 	}
   115     } else {
   116 	video_buffer_idx = 0;
   117 	video_buffer[0].hres = video_buffer[0].vres = 0;
   118     }
   119     pvr2_frame_counter++;
   120     asic_event( EVENT_SCANLINE1 );
   121     asic_event( EVENT_SCANLINE2 );
   122     asic_event( EVENT_RETRACE );
   123 }
   125 void mmio_region_PVR2_write( uint32_t reg, uint32_t val )
   126 {
   127     if( reg >= 0x200 && reg < 0x600 ) { /* Fog table */
   128         MMIO_WRITE( PVR2, reg, val );
   129         /* I don't want to hear about these */
   130         return;
   131     }
   133     INFO( "PVR2 write to %08X <= %08X [%s: %s]", reg, val, 
   134           MMIO_REGID(PVR2,reg), MMIO_REGDESC(PVR2,reg) );
   136     switch(reg) {
   137     case RENDSTART:
   138 	if( val == 0xFFFFFFFF )
   139 	    pvr2_render_scene();
   140 	break;
   141     }
   142     MMIO_WRITE( PVR2, reg, val );
   143 }
   145 MMIO_REGION_READ_FN( PVR2, reg )
   146 {
   147     switch( reg ) {
   148         case BEAMPOS:
   149             return sh4r.icount&0x20 ? 0x2000 : 1;
   150         default:
   151             return MMIO_READ( PVR2, reg );
   152     }
   153 }
   155 MMIO_REGION_DEFFNS( PVR2PAL )
   157 void pvr2_set_base_address( uint32_t base ) 
   158 {
   159     mmio_region_PVR2_write( DISPADDR1, base );
   160 }
   163 void pvr2_render_scene( void )
   164 {
   165     /* Actual rendering goes here :) */
   166     asic_event( EVENT_PVR_RENDER_DONE );
   167     DEBUG( "Rendered frame %d", pvr2_frame_counter );
   168 }
   170 /** Tile Accelerator */
   172 struct tacmd {
   173     uint32_t command;
   174     uint32_t param1;
   175     uint32_t param2;
   176     uint32_t texture;
   177     float alpha;
   178     float red;
   179     float green;
   180     float blue;
   181 };
   183 int32_t mmio_region_PVR2TA_read( uint32_t reg )
   184 {
   185     return 0xFFFFFFFF;
   186 }
   188 char pvr2ta_remainder[8];
   190 void mmio_region_PVR2TA_write( uint32_t reg, uint32_t val )
   191 {
   192     DEBUG( "Direct write to TA %08X", val );
   193 }
   195 unsigned int pvr2_last_poly_type = 0;
   197 void pvr2ta_write( char *buf, uint32_t length )
   198 {
   199     int i;
   200     struct tacmd *cmd_list = (struct tacmd *)buf;
   201     int count = length >> 5;
   202     for( i=0; i<count; i++ ){
   203 	unsigned int type = (cmd_list[i].command >> 24) & 0xFF;
   204 	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 );
   205 	if( type == 0 ) {
   206 	    /* End of list */
   207 	    switch( pvr2_last_poly_type ) {
   208 	    case 0x80: /* Opaque polys */
   209 		asic_event( EVENT_PVR_OPAQUE_DONE );
   210 		break;
   211 	    case 0x81: /* Opaque poly modifier */
   212 		asic_event( EVENT_PVR_OPAQUEMOD_DONE );
   213 		break;
   214 	    case 0x82: /* Transparent polys */
   215 		asic_event( EVENT_PVR_TRANS_DONE );
   216 		break;
   217 	    case 0x83: /* Transparent poly modifier */
   218 		asic_event( EVENT_PVR_TRANSMOD_DONE );
   219 		break;
   220 	    case 0x84: /* Punchthrough */
   221 		asic_event( EVENT_PVR_PUNCHOUT_DONE );
   222 		break;
   223 	    }
   224 	    pvr2_last_poly_type = 0;
   225 	} else if( type >= 0x80 && type <= 0x84 ) {
   226 	    pvr2_last_poly_type = type;
   227 	}
   228     }
   229 }
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