| 1 | /* |
| 2 | * (C) GraÅžvydas "notaz" Ignotas, 2006-2009,2013 |
| 3 | * |
| 4 | * This work is licensed under the terms of any of these licenses |
| 5 | * (at your option): |
| 6 | * - GNU GPL, version 2 or later. |
| 7 | * - GNU LGPL, version 2.1 or later. |
| 8 | * - MAME license. |
| 9 | * See the COPYING file in the top-level directory. |
| 10 | */ |
| 11 | |
| 12 | #include <stdio.h> |
| 13 | #include <stdlib.h> |
| 14 | #include <string.h> |
| 15 | #include <linux/fb.h> |
| 16 | #include <sys/mman.h> |
| 17 | |
| 18 | #include "../libpicofe/gp2x/plat_gp2x.h" |
| 19 | #include "../libpicofe/gp2x/soc.h" |
| 20 | #include "../common/arm_utils.h" |
| 21 | #include "../common/emu.h" |
| 22 | #include "plat.h" |
| 23 | |
| 24 | #define FRAMEBUFF_SIZE 0x30000 |
| 25 | #define FRAMEBUFF_WHOLESIZE (FRAMEBUFF_SIZE*4) // 320*240*2 + some more |
| 26 | #define FRAMEBUFF_ADDR0 (0x4000000 - FRAMEBUFF_WHOLESIZE) |
| 27 | #define FRAMEBUFF_ADDR1 (FRAMEBUFF_ADDR0 + FRAMEBUFF_SIZE) |
| 28 | #define FRAMEBUFF_ADDR2 (FRAMEBUFF_ADDR1 + FRAMEBUFF_SIZE) |
| 29 | #define FRAMEBUFF_ADDR3 (FRAMEBUFF_ADDR2 + FRAMEBUFF_SIZE) |
| 30 | |
| 31 | static const int gp2x_screenaddrs[4] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 }; |
| 32 | static int gp2x_screenaddrs_use[4]; |
| 33 | |
| 34 | static unsigned short gp2x_screenaddr_old[4]; |
| 35 | static int screensel; |
| 36 | |
| 37 | static void gp2x_video_flip_(void) |
| 38 | { |
| 39 | unsigned short lsw = (unsigned short) gp2x_screenaddrs_use[screensel&3]; |
| 40 | unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&3] >> 16); |
| 41 | |
| 42 | memregs[0x2910>>1] = msw; |
| 43 | memregs[0x2914>>1] = msw; |
| 44 | memregs[0x290E>>1] = lsw; |
| 45 | memregs[0x2912>>1] = lsw; |
| 46 | |
| 47 | // jump to other buffer: |
| 48 | g_screen_ptr = gp2x_screens[++screensel&3]; |
| 49 | } |
| 50 | |
| 51 | /* doulblebuffered flip */ |
| 52 | static void gp2x_video_flip2_(void) |
| 53 | { |
| 54 | unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&1] >> 16); |
| 55 | |
| 56 | memregs[0x2910>>1] = msw; |
| 57 | memregs[0x2914>>1] = msw; |
| 58 | memregs[0x290E>>1] = 0; |
| 59 | memregs[0x2912>>1] = 0; |
| 60 | |
| 61 | // jump to other buffer: |
| 62 | g_screen_ptr = gp2x_screens[++screensel&1]; |
| 63 | } |
| 64 | |
| 65 | static void gp2x_video_changemode_ll_(int bpp, int is_pal) |
| 66 | { |
| 67 | memregs[0x28DA>>1] = (((bpp+1)/8)<<9)|0xAB; /*8/15/16/24bpp...*/ |
| 68 | memregs[0x290C>>1] = 320*((bpp+1)/8); /*line width in bytes*/ |
| 69 | } |
| 70 | |
| 71 | static void gp2x_video_setpalette_(int *pal, int len) |
| 72 | { |
| 73 | unsigned short *g = (unsigned short *)pal; |
| 74 | volatile unsigned short *memreg = &memregs[0x295A>>1]; |
| 75 | |
| 76 | memregs[0x2958>>1] = 0; |
| 77 | |
| 78 | len *= 2; |
| 79 | while (len--) |
| 80 | *memreg = *g++; |
| 81 | } |
| 82 | |
| 83 | static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H) |
| 84 | { |
| 85 | float escalaw, escalah; |
| 86 | int bpp = (memregs[0x28DA>>1]>>9)&0x3; |
| 87 | unsigned short scalw; |
| 88 | |
| 89 | // set offset |
| 90 | gp2x_screenaddrs_use[0] = gp2x_screenaddrs[0] + ln_offs * 320 * bpp; |
| 91 | gp2x_screenaddrs_use[1] = gp2x_screenaddrs[1] + ln_offs * 320 * bpp; |
| 92 | gp2x_screenaddrs_use[2] = gp2x_screenaddrs[2] + ln_offs * 320 * bpp; |
| 93 | gp2x_screenaddrs_use[3] = gp2x_screenaddrs[3] + ln_offs * 320 * bpp; |
| 94 | |
| 95 | escalaw = 1024.0; // RGB Horiz LCD |
| 96 | escalah = 320.0; // RGB Vert LCD |
| 97 | |
| 98 | if (memregs[0x2800>>1]&0x100) //TV-Out |
| 99 | { |
| 100 | escalaw=489.0; // RGB Horiz TV (PAL, NTSC) |
| 101 | if (memregs[0x2818>>1] == 287) //PAL |
| 102 | escalah=274.0; // RGB Vert TV PAL |
| 103 | else if (memregs[0x2818>>1] == 239) //NTSC |
| 104 | escalah=331.0; // RGB Vert TV NTSC |
| 105 | } |
| 106 | |
| 107 | // scale horizontal |
| 108 | scalw = (unsigned short)((float)escalaw *(W/320.0)); |
| 109 | /* if there is no horizontal scaling, vertical doesn't work. |
| 110 | * Here is a nasty wrokaround... */ |
| 111 | if (H != 240 && W == 320) scalw--; |
| 112 | memregs[0x2906>>1]=scalw; |
| 113 | // scale vertical |
| 114 | memregl[0x2908>>2]=(unsigned long)((float)escalah *bpp *(H/240.0)); |
| 115 | } |
| 116 | |
| 117 | static void gp2x_video_wait_vsync_(void) |
| 118 | { |
| 119 | unsigned short v = memregs[0x1182>>1]; |
| 120 | while (!((v ^ memregs[0x1182>>1]) & 0x10)) |
| 121 | spend_cycles(1024); |
| 122 | } |
| 123 | |
| 124 | |
| 125 | void vid_mmsp2_init(void) |
| 126 | { |
| 127 | int i; |
| 128 | |
| 129 | gp2x_screens[0] = mmap(0, FRAMEBUFF_WHOLESIZE, PROT_WRITE, MAP_SHARED, |
| 130 | memdev, gp2x_screenaddrs[0]); |
| 131 | if (gp2x_screens[0] == MAP_FAILED) |
| 132 | { |
| 133 | perror("mmap(g_screen_ptr)"); |
| 134 | exit(1); |
| 135 | } |
| 136 | printf("framebuffers:\n"); |
| 137 | printf(" %08x -> %p\n", gp2x_screenaddrs[0], gp2x_screens[0]); |
| 138 | for (i = 1; i < 4; i++) |
| 139 | { |
| 140 | gp2x_screens[i] = (char *) gp2x_screens[i - 1] + FRAMEBUFF_SIZE; |
| 141 | printf(" %08x -> %p\n", gp2x_screenaddrs[i], gp2x_screens[i]); |
| 142 | } |
| 143 | |
| 144 | g_screen_ptr = gp2x_screens[0]; |
| 145 | screensel = 0; |
| 146 | |
| 147 | gp2x_screenaddr_old[0] = memregs[0x290E>>1]; |
| 148 | gp2x_screenaddr_old[1] = memregs[0x2910>>1]; |
| 149 | gp2x_screenaddr_old[2] = memregs[0x2912>>1]; |
| 150 | gp2x_screenaddr_old[3] = memregs[0x2914>>1]; |
| 151 | |
| 152 | memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs)); |
| 153 | |
| 154 | gp2x_video_flip = gp2x_video_flip_; |
| 155 | gp2x_video_flip2 = gp2x_video_flip2_; |
| 156 | gp2x_video_changemode_ll = gp2x_video_changemode_ll_; |
| 157 | gp2x_video_setpalette = gp2x_video_setpalette_; |
| 158 | gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_; |
| 159 | gp2x_video_wait_vsync = gp2x_video_wait_vsync_; |
| 160 | } |
| 161 | |
| 162 | void vid_mmsp2_finish(void) |
| 163 | { |
| 164 | gp2x_video_RGB_setscaling_(0, 320, 240); |
| 165 | gp2x_video_changemode_ll_(16, 0); |
| 166 | |
| 167 | memregs[0x290E>>1] = gp2x_screenaddr_old[0]; |
| 168 | memregs[0x2910>>1] = gp2x_screenaddr_old[1]; |
| 169 | memregs[0x2912>>1] = gp2x_screenaddr_old[2]; |
| 170 | memregs[0x2914>>1] = gp2x_screenaddr_old[3]; |
| 171 | |
| 172 | munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE); |
| 173 | } |