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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" |
10 | #include "../common/emu.h" |
11 | |
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12 | gp2x_soc_t soc_detect(void) |
13 | { |
14 | volatile unsigned short *memregs; |
15 | volatile unsigned int *memregl; |
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16 | static gp2x_soc_t ret = -1; |
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17 | int pollux_chipname[0x30/4 + 1]; |
18 | char *pollux_chipname_c = (char *)pollux_chipname; |
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19 | int memdev; |
20 | int i; |
21 | |
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22 | if (ret != -1) |
23 | /* already detected */ |
24 | return ret; |
25 | |
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26 | memdev = open("/dev/mem", O_RDONLY); |
27 | if (memdev == -1) |
28 | { |
29 | perror("open(/dev/mem)"); |
30 | return -1; |
31 | } |
32 | |
33 | memregs = mmap(0, 0x20000, PROT_READ, MAP_SHARED, memdev, 0xc0000000); |
34 | if (memregs == MAP_FAILED) |
35 | { |
36 | perror("mmap(memregs)"); |
37 | close(memdev); |
38 | return -1; |
39 | } |
40 | memregl = (volatile void *)memregs; |
41 | |
42 | if (memregs[0x1836>>1] == 0x2330) |
43 | { |
44 | printf("looks like this is MMSP2\n"); |
45 | ret = SOCID_MMSP2; |
46 | goto out; |
47 | } |
48 | |
49 | /* perform word reads. Byte reads might also work, |
50 | * but we don't want to play with that. */ |
51 | for (i = 0; i < 0x30; i += 4) |
52 | { |
53 | pollux_chipname[i >> 2] = memregl[(0x1f810 + i) >> 2]; |
54 | } |
55 | pollux_chipname_c[0x30] = 0; |
56 | |
57 | for (i = 0; i < 0x30; i++) |
58 | { |
59 | unsigned char c = pollux_chipname_c[i]; |
60 | if (c < 0x20 || c > 0x7f) |
61 | goto not_pollux_like; |
62 | } |
63 | |
64 | printf("found pollux-like id: \"%s\"\n", pollux_chipname_c); |
65 | |
66 | if (strncmp(pollux_chipname_c, "MAGICEYES-LEAPFROG-LF1000", 25) || |
67 | strncmp(pollux_chipname_c, "MAGICEYES-POLLUX", 16)) |
68 | { |
69 | ret = SOCID_POLLUX; |
70 | goto out; |
71 | } |
72 | |
73 | not_pollux_like: |
74 | out: |
75 | munmap((void *)memregs, 0x20000); |
76 | close(memdev); |
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77 | return ret; |
78 | } |
79 | |