nkeynes@31: /**
nkeynes@106:  * $Id: pvr2.c,v 1.18 2006-03-14 12:45:53 nkeynes Exp $
nkeynes@31:  *
nkeynes@100:  * PVR2 (Video) Core MMIO registers.
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@103: #include "pvr2/pvr2.h"
nkeynes@56: #include "sh4/sh4core.h"
nkeynes@1: #define MMIO_IMPL
nkeynes@103: #include "pvr2/pvr2mmio.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@103: /**
nkeynes@103:  * Current PVR2 ram address of the data (if any) currently held in the 
nkeynes@103:  * OpenGL buffers.
nkeynes@103:  */
nkeynes@103: 
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@103: struct video_timing {
nkeynes@103:     int fields_per_second;
nkeynes@103:     int total_lines;
nkeynes@103:     int display_lines;
nkeynes@103:     int line_time_ns;
nkeynes@103: };
nkeynes@103: 
nkeynes@103: struct video_timing pal_timing = { 50, 625, 575, 32000 };
nkeynes@103: struct video_timing ntsc_timing= { 60, 525, 480, 31746 };
nkeynes@103: 
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@106: }
nkeynes@106: 
nkeynes@106: void video_set_driver( video_driver_t driver )
nkeynes@106: {
nkeynes@106:     if( video_driver != NULL && video_driver->shutdown_driver != NULL )
nkeynes@106: 	video_driver->shutdown_driver();
nkeynes@106: 
nkeynes@106:     video_driver = driver;
nkeynes@106:     if( driver->init_driver != NULL )
nkeynes@106: 	driver->init_driver();
nkeynes@106:     driver->set_display_format( 640, 480, COLFMT_RGB32 );
nkeynes@1: }
nkeynes@1: 
nkeynes@103: uint32_t pvr2_line_count = 0;
nkeynes@103: uint32_t pvr2_line_remainder = 0;
nkeynes@103: uint32_t pvr2_irq_vpos1 = 0;
nkeynes@103: uint32_t pvr2_irq_vpos2 = 0;
nkeynes@103: struct video_timing *pvr2_timing = &ntsc_timing;
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@103:     pvr2_line_remainder += nanosecs;
nkeynes@103:     while( pvr2_line_remainder >= pvr2_timing->line_time_ns ) {
nkeynes@103: 	pvr2_line_remainder -= pvr2_timing->line_time_ns;
nkeynes@103: 	pvr2_line_count++;
nkeynes@103: 	if( pvr2_line_count == pvr2_irq_vpos1 ) {
nkeynes@103: 	    asic_event( EVENT_SCANLINE1 );
nkeynes@103: 	} 
nkeynes@103: 	if( pvr2_line_count == pvr2_irq_vpos2 ) {
nkeynes@103: 	    asic_event( EVENT_SCANLINE2 );
nkeynes@103: 	}
nkeynes@103: 	if( pvr2_line_count == pvr2_timing->display_lines ) {
nkeynes@103: 	    asic_event( EVENT_RETRACE );
nkeynes@103: 	} else if( pvr2_line_count == pvr2_timing->total_lines ) {
nkeynes@103: 	    pvr2_display_frame();
nkeynes@103: 	    pvr2_line_count = 0;
nkeynes@103: 	}
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@103: /**
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@103:     uint32_t display_addr = MMIO_READ( PVR2, DISPADDR1 );
nkeynes@103:     
nkeynes@94:     int dispsize = MMIO_READ( PVR2, DISPSIZE );
nkeynes@94:     int dispmode = MMIO_READ( PVR2, DISPMODE );
nkeynes@103:     int vidcfg = MMIO_READ( PVR2, DISPCFG );
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@103:     gboolean bEnabled = (dispmode & DISPMODE_DE) && (vidcfg & DISPCFG_VO ) ? TRUE : FALSE;
nkeynes@103:     gboolean interlaced = (vidcfg & DISPCFG_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->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@103: 	switch( (dispmode & DISPMODE_COL) >> 2 ) {
nkeynes@103: 	case 0: 
nkeynes@103: 	    buffer->colour_format = COLFMT_ARGB1555;
nkeynes@103: 	    buffer->hres = vid_ppl << 1; 
nkeynes@103: 	    break;
nkeynes@103: 	case 1: 
nkeynes@103: 	    buffer->colour_format = COLFMT_RGB565;
nkeynes@103: 	    buffer->hres = vid_ppl << 1; 
nkeynes@103: 	    break;
nkeynes@103: 	case 2:
nkeynes@103: 	    buffer->colour_format = COLFMT_RGB888;
nkeynes@103: 	    buffer->hres = (vid_ppl << 2) / 3; 
nkeynes@103: 	    break;
nkeynes@103: 	case 3: 
nkeynes@103: 	    buffer->colour_format = COLFMT_ARGB8888;
nkeynes@103: 	    buffer->hres = vid_ppl; 
nkeynes@103: 	    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@103: 		video_driver->set_display_format( buffer->hres, buffer->vres,
nkeynes@103: 						  buffer->colour_format );
nkeynes@94: 	    }
nkeynes@103: 	    if( MMIO_READ( PVR2, DISPCFG2 ) & 0x08 ) { /* Blanked */
nkeynes@100: 		uint32_t colour = MMIO_READ( PVR2, DISPBORDER );
nkeynes@94: 		video_driver->display_blank_frame( colour );
nkeynes@103: 	    } else if( !pvr2_render_display_frame( PVR2_RAM_BASE + display_addr ) ) {
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@103:     case VPOS_IRQ:
nkeynes@103: 	pvr2_irq_vpos1 = (val >> 16) & 0x03FF;
nkeynes@103: 	pvr2_irq_vpos2 = val & 0x03FF;
nkeynes@103: 	break;
nkeynes@100:     case TAINIT:
nkeynes@100: 	if( val & 0x80000000 )
nkeynes@100: 	    pvr2_ta_init();
nkeynes@100: 	break;
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: 
nkeynes@98: 
nkeynes@56: int32_t mmio_region_PVR2TA_read( uint32_t reg )
nkeynes@56: {
nkeynes@56:     return 0xFFFFFFFF;
nkeynes@56: }
nkeynes@56: 
nkeynes@56: void mmio_region_PVR2TA_write( uint32_t reg, uint32_t val )
nkeynes@56: {
nkeynes@100:     pvr2_ta_write( &val, sizeof(uint32_t) );
nkeynes@56: }
nkeynes@56: 
nkeynes@85: 
nkeynes@103: void pvr2_vram64_write( sh4addr_t destaddr, char *src, uint32_t length )
nkeynes@103: {
nkeynes@103:     int bank_flag = (destaddr & 0x04) >> 2;
nkeynes@103:     uint32_t *banks[2];
nkeynes@103:     uint32_t *dwsrc;
nkeynes@103:     int i;
nkeynes@65: 
nkeynes@103:     destaddr = destaddr & 0x7FFFFF;
nkeynes@103:     if( destaddr + length > 0x800000 ) {
nkeynes@103: 	length = 0x800000 - destaddr;
nkeynes@103:     }
nkeynes@103: 
nkeynes@103:     for( i=destaddr & 0xFFFFF000; i < destaddr + length; i+= PAGE_SIZE ) {
nkeynes@103: 	texcache_invalidate_page( i );
nkeynes@103:     }
nkeynes@103: 
nkeynes@103:     banks[0] = ((uint32_t *)(video_base + (destaddr>>3)));
nkeynes@103:     banks[1] = banks[0] + 0x100000;
nkeynes@103:     
nkeynes@103:     /* Handle non-aligned start of source */
nkeynes@103:     if( destaddr & 0x03 ) {
nkeynes@103: 	char *dest = ((char *)banks[bank_flag]) + (destaddr & 0x03);
nkeynes@103: 	for( i= destaddr & 0x03; i < 4 && length > 0; i++, length-- ) {
nkeynes@103: 	    *dest++ = *src++;
nkeynes@103: 	}
nkeynes@103: 	bank_flag = !bank_flag;
nkeynes@103:     }
nkeynes@103: 
nkeynes@103:     dwsrc = (uint32_t *)src;
nkeynes@103:     while( length >= 4 ) {
nkeynes@103: 	*banks[bank_flag]++ = *dwsrc++;
nkeynes@103: 	bank_flag = !bank_flag;
nkeynes@103: 	length -= 4;
nkeynes@103:     }
nkeynes@103:     
nkeynes@103:     /* Handle non-aligned end of source */
nkeynes@103:     if( length ) {
nkeynes@103: 	src = (char *)dwsrc;
nkeynes@103: 	char *dest = (char *)banks[bank_flag];
nkeynes@103: 	while( length-- > 0 ) {
nkeynes@103: 	    *dest++ = *src++;
nkeynes@103: 	}
nkeynes@103:     }  
nkeynes@103: 
nkeynes@103: }
nkeynes@103: 
nkeynes@103: void pvr2_vram64_read( char *dest, sh4addr_t srcaddr, uint32_t length )
nkeynes@103: {
nkeynes@103:     int bank_flag = (srcaddr & 0x04) >> 2;
nkeynes@103:     uint32_t *banks[2];
nkeynes@103:     uint32_t *dwdest;
nkeynes@103:     int i;
nkeynes@103: 
nkeynes@103:     srcaddr = srcaddr & 0x7FFFFF;
nkeynes@103:     if( srcaddr + length > 0x800000 )
nkeynes@103: 	length = 0x800000 - srcaddr;
nkeynes@103: 
nkeynes@103:     banks[0] = ((uint32_t *)(video_base + (srcaddr>>3)));
nkeynes@103:     banks[1] = banks[0] + 0x100000;
nkeynes@103:     
nkeynes@103:     /* Handle non-aligned start of source */
nkeynes@103:     if( srcaddr & 0x03 ) {
nkeynes@103: 	char *src = ((char *)banks[bank_flag]) + (srcaddr & 0x03);
nkeynes@103: 	for( i= srcaddr & 0x03; i < 4 && length > 0; i++, length-- ) {
nkeynes@103: 	    *dest++ = *src++;
nkeynes@103: 	}
nkeynes@103: 	bank_flag = !bank_flag;
nkeynes@103:     }
nkeynes@103: 
nkeynes@103:     dwdest = (uint32_t *)dest;
nkeynes@103:     while( length >= 4 ) {
nkeynes@103: 	*dwdest++ = *banks[bank_flag]++;
nkeynes@103: 	bank_flag = !bank_flag;
nkeynes@103: 	length -= 4;
nkeynes@103:     }
nkeynes@103:     
nkeynes@103:     /* Handle non-aligned end of source */
nkeynes@103:     if( length ) {
nkeynes@103: 	dest = (char *)dwdest;
nkeynes@103: 	char *src = (char *)banks[bank_flag];
nkeynes@103: 	while( length-- > 0 ) {
nkeynes@103: 	    *dest++ = *src++;
nkeynes@103: 	}
nkeynes@103:     }
nkeynes@103: }