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1 | #include <stdio.h> |
2 | #include <string.h> |
3 | #include <sys/types.h> |
4 | #include <sys/stat.h> |
5 | #include <fcntl.h> |
6 | #include <sys/mman.h> |
7 | #include <unistd.h> |
8 | |
9 | #include "soc.h" |
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10 | |
11 | void (*gp2x_video_flip)(void); |
12 | void (*gp2x_video_flip2)(void); |
13 | void (*gp2x_video_changemode_ll)(int bpp); |
14 | void (*gp2x_video_setpalette)(int *pal, int len); |
15 | void (*gp2x_video_RGB_setscaling)(int ln_offs, int W, int H); |
16 | void (*gp2x_video_wait_vsync)(void); |
17 | |
18 | void (*gp2x_set_cpuclk)(unsigned int mhz); |
19 | |
20 | void (*set_lcd_custom_rate)(int is_pal); |
21 | void (*unset_lcd_custom_rate)(void); |
22 | void (*set_lcd_gamma)(int g100, int A_SNs_curve); |
23 | |
24 | void (*set_ram_timings)(void); |
25 | void (*unset_ram_timings)(void); |
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26 | int (*gp2x_read_battery)(void); |
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27 | |
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28 | |
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29 | gp2x_soc_t soc_detect(void) |
30 | { |
31 | volatile unsigned short *memregs; |
32 | volatile unsigned int *memregl; |
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33 | static gp2x_soc_t ret = -1; |
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34 | int pollux_chipname[0x30/4 + 1]; |
35 | char *pollux_chipname_c = (char *)pollux_chipname; |
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36 | int memdev; |
37 | int i; |
38 | |
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39 | if (ret != -1) |
40 | /* already detected */ |
41 | return ret; |
42 | |
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43 | memdev = open("/dev/mem", O_RDONLY); |
44 | if (memdev == -1) |
45 | { |
46 | perror("open(/dev/mem)"); |
47 | return -1; |
48 | } |
49 | |
50 | memregs = mmap(0, 0x20000, PROT_READ, MAP_SHARED, memdev, 0xc0000000); |
51 | if (memregs == MAP_FAILED) |
52 | { |
53 | perror("mmap(memregs)"); |
54 | close(memdev); |
55 | return -1; |
56 | } |
57 | memregl = (volatile void *)memregs; |
58 | |
59 | if (memregs[0x1836>>1] == 0x2330) |
60 | { |
61 | printf("looks like this is MMSP2\n"); |
62 | ret = SOCID_MMSP2; |
63 | goto out; |
64 | } |
65 | |
66 | /* perform word reads. Byte reads might also work, |
67 | * but we don't want to play with that. */ |
68 | for (i = 0; i < 0x30; i += 4) |
69 | { |
70 | pollux_chipname[i >> 2] = memregl[(0x1f810 + i) >> 2]; |
71 | } |
72 | pollux_chipname_c[0x30] = 0; |
73 | |
74 | for (i = 0; i < 0x30; i++) |
75 | { |
76 | unsigned char c = pollux_chipname_c[i]; |
77 | if (c < 0x20 || c > 0x7f) |
78 | goto not_pollux_like; |
79 | } |
80 | |
81 | printf("found pollux-like id: \"%s\"\n", pollux_chipname_c); |
82 | |
83 | if (strncmp(pollux_chipname_c, "MAGICEYES-LEAPFROG-LF1000", 25) || |
84 | strncmp(pollux_chipname_c, "MAGICEYES-POLLUX", 16)) |
85 | { |
86 | ret = SOCID_POLLUX; |
87 | goto out; |
88 | } |
89 | |
90 | not_pollux_like: |
91 | out: |
92 | munmap((void *)memregs, 0x20000); |
93 | close(memdev); |
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94 | return ret; |
95 | } |
96 | |