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- /*
- * (C) Gražvydas "notaz" Ignotas, 2006-2009,2013
- *
- * This work is licensed under the terms of any of these licenses
- * (at your option):
- * - GNU GPL, version 2 or later.
- * - GNU LGPL, version 2.1 or later.
- * - MAME license.
- * See the COPYING file in the top-level directory.
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <linux/fb.h>
- #include <sys/mman.h>
- #include "../libpicofe/gp2x/plat_gp2x.h"
- #include "../libpicofe/gp2x/soc.h"
- #include "../common/arm_utils.h"
- #include "../common/emu.h"
- #include "plat.h"
- #define FRAMEBUFF_SIZE 0x30000
- #define FRAMEBUFF_WHOLESIZE (FRAMEBUFF_SIZE*4) // 320*240*2 + some more
- #define FRAMEBUFF_ADDR0 (0x4000000 - FRAMEBUFF_WHOLESIZE)
- #define FRAMEBUFF_ADDR1 (FRAMEBUFF_ADDR0 + FRAMEBUFF_SIZE)
- #define FRAMEBUFF_ADDR2 (FRAMEBUFF_ADDR1 + FRAMEBUFF_SIZE)
- #define FRAMEBUFF_ADDR3 (FRAMEBUFF_ADDR2 + FRAMEBUFF_SIZE)
- static const int gp2x_screenaddrs[4] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };
- static int gp2x_screenaddrs_use[4];
- static unsigned short gp2x_screenaddr_old[4];
- static int screensel;
- static void gp2x_video_flip_(void)
- {
- unsigned short lsw = (unsigned short) gp2x_screenaddrs_use[screensel&3];
- unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&3] >> 16);
- memregs[0x2910>>1] = msw;
- memregs[0x2914>>1] = msw;
- memregs[0x290E>>1] = lsw;
- memregs[0x2912>>1] = lsw;
- // jump to other buffer:
- g_screen_ptr = gp2x_screens[++screensel&3];
- }
- /* doulblebuffered flip */
- static void gp2x_video_flip2_(void)
- {
- unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&1] >> 16);
- memregs[0x2910>>1] = msw;
- memregs[0x2914>>1] = msw;
- memregs[0x290E>>1] = 0;
- memregs[0x2912>>1] = 0;
- // jump to other buffer:
- g_screen_ptr = gp2x_screens[++screensel&1];
- }
- static void gp2x_video_changemode_ll_(int bpp)
- {
- printf("changemode %d\n", bpp);
- memregs[0x28DA>>1] = (((bpp+1)/8)<<9)|0xAB; /*8/15/16/24bpp...*/
- memregs[0x290C>>1] = 320*((bpp+1)/8); /*line width in bytes*/
- }
- static void gp2x_video_setpalette_(int *pal, int len)
- {
- unsigned short *g = (unsigned short *)pal;
- volatile unsigned short *memreg = &memregs[0x295A>>1];
- memregs[0x2958>>1] = 0;
- len *= 2;
- while (len--)
- *memreg = *g++;
- }
- static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H)
- {
- float escalaw, escalah;
- int bpp = (memregs[0x28DA>>1]>>9)&0x3;
- unsigned short scalw;
- // set offset
- gp2x_screenaddrs_use[0] = gp2x_screenaddrs[0] + ln_offs * 320 * bpp;
- gp2x_screenaddrs_use[1] = gp2x_screenaddrs[1] + ln_offs * 320 * bpp;
- gp2x_screenaddrs_use[2] = gp2x_screenaddrs[2] + ln_offs * 320 * bpp;
- gp2x_screenaddrs_use[3] = gp2x_screenaddrs[3] + ln_offs * 320 * bpp;
- escalaw = 1024.0; // RGB Horiz LCD
- escalah = 320.0; // RGB Vert LCD
- if (memregs[0x2800>>1]&0x100) //TV-Out
- {
- escalaw=489.0; // RGB Horiz TV (PAL, NTSC)
- if (memregs[0x2818>>1] == 287) //PAL
- escalah=274.0; // RGB Vert TV PAL
- else if (memregs[0x2818>>1] == 239) //NTSC
- escalah=331.0; // RGB Vert TV NTSC
- }
- // scale horizontal
- scalw = (unsigned short)((float)escalaw *(W/320.0));
- /* if there is no horizontal scaling, vertical doesn't work.
- * Here is a nasty wrokaround... */
- if (H != 240 && W == 320) scalw--;
- memregs[0x2906>>1]=scalw;
- // scale vertical
- memregl[0x2908>>2]=(unsigned long)((float)escalah *bpp *(H/240.0));
- }
- static void gp2x_video_wait_vsync_(void)
- {
- unsigned short v = memregs[0x1182>>1];
- while (!((v ^ memregs[0x1182>>1]) & 0x10))
- spend_cycles(1024);
- }
- void vid_mmsp2_init(void)
- {
- int i;
- gp2x_screens[0] = mmap(0, FRAMEBUFF_WHOLESIZE, PROT_WRITE, MAP_SHARED,
- memdev, gp2x_screenaddrs[0]);
- if (gp2x_screens[0] == MAP_FAILED)
- {
- perror("mmap(g_screen_ptr)");
- exit(1);
- }
- printf("framebuffers:\n");
- printf(" %08x -> %p\n", gp2x_screenaddrs[0], gp2x_screens[0]);
- for (i = 1; i < 4; i++)
- {
- gp2x_screens[i] = (char *) gp2x_screens[i - 1] + FRAMEBUFF_SIZE;
- printf(" %08x -> %p\n", gp2x_screenaddrs[i], gp2x_screens[i]);
- }
- g_screen_ptr = gp2x_screens[0];
- screensel = 0;
- gp2x_screenaddr_old[0] = memregs[0x290E>>1];
- gp2x_screenaddr_old[1] = memregs[0x2910>>1];
- gp2x_screenaddr_old[2] = memregs[0x2912>>1];
- gp2x_screenaddr_old[3] = memregs[0x2914>>1];
- memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs));
- gp2x_video_flip = gp2x_video_flip_;
- gp2x_video_flip2 = gp2x_video_flip2_;
- gp2x_video_changemode_ll = gp2x_video_changemode_ll_;
- gp2x_video_setpalette = gp2x_video_setpalette_;
- gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_;
- gp2x_video_wait_vsync = gp2x_video_wait_vsync_;
- }
- void vid_mmsp2_finish(void)
- {
- gp2x_video_RGB_setscaling_(0, 320, 240);
- gp2x_video_changemode_ll_(16);
- memregs[0x290E>>1] = gp2x_screenaddr_old[0];
- memregs[0x2910>>1] = gp2x_screenaddr_old[1];
- memregs[0x2912>>1] = gp2x_screenaddr_old[2];
- memregs[0x2914>>1] = gp2x_screenaddr_old[3];
- munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);
- }
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