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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 | unsigned int (*gp2x_get_ticks_ms)(void); |
29 | unsigned int (*gp2x_get_ticks_us)(void); |
30 | |
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31 | |
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32 | gp2x_soc_t soc_detect(void) |
33 | { |
34 | volatile unsigned short *memregs; |
35 | volatile unsigned int *memregl; |
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36 | static gp2x_soc_t ret = -2; |
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37 | int pollux_chipname[0x30/4 + 1]; |
38 | char *pollux_chipname_c = (char *)pollux_chipname; |
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39 | int memdev; |
40 | int i; |
41 | |
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42 | if ((int)ret != -2) |
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43 | /* already detected */ |
44 | return ret; |
45 | |
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46 | memdev = open("/dev/mem", O_RDONLY); |
47 | if (memdev == -1) |
48 | { |
49 | perror("open(/dev/mem)"); |
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50 | ret = -1; |
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51 | return -1; |
52 | } |
53 | |
54 | memregs = mmap(0, 0x20000, PROT_READ, MAP_SHARED, memdev, 0xc0000000); |
55 | if (memregs == MAP_FAILED) |
56 | { |
57 | perror("mmap(memregs)"); |
58 | close(memdev); |
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59 | ret = -1; |
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60 | return -1; |
61 | } |
62 | memregl = (volatile void *)memregs; |
63 | |
64 | if (memregs[0x1836>>1] == 0x2330) |
65 | { |
66 | printf("looks like this is MMSP2\n"); |
67 | ret = SOCID_MMSP2; |
68 | goto out; |
69 | } |
70 | |
71 | /* perform word reads. Byte reads might also work, |
72 | * but we don't want to play with that. */ |
73 | for (i = 0; i < 0x30; i += 4) |
74 | { |
75 | pollux_chipname[i >> 2] = memregl[(0x1f810 + i) >> 2]; |
76 | } |
77 | pollux_chipname_c[0x30] = 0; |
78 | |
79 | for (i = 0; i < 0x30; i++) |
80 | { |
81 | unsigned char c = pollux_chipname_c[i]; |
82 | if (c < 0x20 || c > 0x7f) |
83 | goto not_pollux_like; |
84 | } |
85 | |
86 | printf("found pollux-like id: \"%s\"\n", pollux_chipname_c); |
87 | |
88 | if (strncmp(pollux_chipname_c, "MAGICEYES-LEAPFROG-LF1000", 25) || |
89 | strncmp(pollux_chipname_c, "MAGICEYES-POLLUX", 16)) |
90 | { |
91 | ret = SOCID_POLLUX; |
92 | goto out; |
93 | } |
94 | |
95 | not_pollux_like: |
96 | out: |
97 | munmap((void *)memregs, 0x20000); |
98 | close(memdev); |
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99 | return ret; |
100 | } |
101 | |