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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 | |
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65 | static void gp2x_video_changemode_ll_(int bpp, int is_pal) |
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66 | { |
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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); |
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165 | gp2x_video_changemode_ll_(16, 0); |
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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 | } |