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1 | #include <stdio.h> |
2 | #include <stdlib.h> |
3 | #include <string.h> |
4 | #include <sys/types.h> |
5 | #include <sys/stat.h> |
6 | #include <fcntl.h> |
7 | #include <sys/ioctl.h> |
8 | #include <sys/mman.h> |
9 | #include <unistd.h> |
10 | #include <linux/fb.h> |
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11 | #include "warm.h" |
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12 | |
13 | static volatile unsigned short *memregs; |
14 | static volatile unsigned long *memregl; |
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15 | int memdev = -1; |
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16 | |
17 | #define FB_BUF_COUNT 4 |
18 | static unsigned int fb_paddr[FB_BUF_COUNT]; |
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19 | static int fb_buf_count = FB_BUF_COUNT; |
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20 | static int fb_work_buf; |
21 | static int fbdev = -1; |
22 | |
23 | static void *gp2x_screens[FB_BUF_COUNT]; |
24 | static void *g_screen_ptr; |
25 | |
26 | |
27 | static void vout_gp2x_flip(void) |
28 | { |
29 | memregl[0x406C>>2] = fb_paddr[fb_work_buf]; |
30 | memregl[0x4058>>2] |= 0x10; |
31 | |
32 | fb_work_buf++; |
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33 | if (fb_work_buf >= fb_buf_count) |
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34 | fb_work_buf = 0; |
35 | g_screen_ptr = gp2x_screens[fb_work_buf]; |
36 | } |
37 | |
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38 | static int vout_gp2x_init(int no_dblbuf) |
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39 | { |
40 | struct fb_fix_screeninfo fbfix; |
41 | int i, ret; |
42 | |
43 | memdev = open("/dev/mem", O_RDWR); |
44 | if (memdev == -1) { |
45 | perror("open(/dev/mem) failed"); |
46 | exit(1); |
47 | } |
48 | |
49 | memregs = mmap(0, 0x20000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000); |
50 | if (memregs == MAP_FAILED) { |
51 | perror("mmap(memregs) failed"); |
52 | exit(1); |
53 | } |
54 | memregl = (volatile void *)memregs; |
55 | |
56 | fbdev = open("/dev/fb0", O_RDWR); |
57 | if (fbdev < 0) { |
58 | perror("can't open fbdev"); |
59 | exit(1); |
60 | } |
61 | |
62 | ret = ioctl(fbdev, FBIOGET_FSCREENINFO, &fbfix); |
63 | if (ret == -1) { |
64 | perror("ioctl(fbdev) failed"); |
65 | exit(1); |
66 | } |
67 | |
68 | printf("framebuffer: \"%s\" @ %08lx\n", fbfix.id, fbfix.smem_start); |
69 | fb_paddr[0] = fbfix.smem_start; |
70 | |
71 | gp2x_screens[0] = mmap(0, 320*240*2*FB_BUF_COUNT, PROT_READ|PROT_WRITE, |
72 | MAP_SHARED, memdev, fb_paddr[0]); |
73 | if (gp2x_screens[0] == MAP_FAILED) |
74 | { |
75 | perror("mmap(gp2x_screens) failed"); |
76 | exit(1); |
77 | } |
78 | memset(gp2x_screens[0], 0, 320*240*2*FB_BUF_COUNT); |
79 | |
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80 | if (!no_dblbuf) { |
81 | warm_init(); |
82 | ret = warm_change_cb_range(WCB_B_BIT, 1, gp2x_screens[0], 320*240*2*FB_BUF_COUNT); |
83 | if (ret != 0) |
84 | fprintf(stderr, "could not make fb buferable.\n"); |
85 | } |
86 | |
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87 | printf(" %p -> %08x\n", gp2x_screens[0], fb_paddr[0]); |
88 | for (i = 1; i < FB_BUF_COUNT; i++) |
89 | { |
90 | fb_paddr[i] = fb_paddr[i-1] + 320*240*2; |
91 | gp2x_screens[i] = (char *)gp2x_screens[i-1] + 320*240*2; |
92 | printf(" %p -> %08x\n", gp2x_screens[i], fb_paddr[i]); |
93 | } |
94 | fb_work_buf = 0; |
95 | g_screen_ptr = gp2x_screens[0]; |
96 | |
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97 | if (no_dblbuf) |
98 | fb_buf_count = 1; |
99 | |
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100 | return 0; |
101 | } |
102 | |
103 | void vout_gp2x_finish(void) |
104 | { |
105 | memregl[0x406C>>2] = fb_paddr[0]; |
106 | memregl[0x4058>>2] |= 0x10; |
107 | close(fbdev); |
108 | |
109 | munmap((void *)memregs, 0x20000); |
110 | close(memdev); |
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111 | |
112 | warm_finish(); |
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113 | } |
114 | |