42171343 |
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 | |
12 | gp2x_soc_t gp2x_soc = -1; |
13 | |
14 | gp2x_soc_t soc_detect(void) |
15 | { |
16 | volatile unsigned short *memregs; |
17 | volatile unsigned int *memregl; |
18 | int pollux_chipname[0x30/4 + 1]; |
19 | char *pollux_chipname_c = (char *)pollux_chipname; |
20 | gp2x_soc_t ret = -1; |
21 | int memdev; |
22 | int i; |
23 | |
24 | memdev = open("/dev/mem", O_RDONLY); |
25 | if (memdev == -1) |
26 | { |
27 | perror("open(/dev/mem)"); |
28 | return -1; |
29 | } |
30 | |
31 | memregs = mmap(0, 0x20000, PROT_READ, MAP_SHARED, memdev, 0xc0000000); |
32 | if (memregs == MAP_FAILED) |
33 | { |
34 | perror("mmap(memregs)"); |
35 | close(memdev); |
36 | return -1; |
37 | } |
38 | memregl = (volatile void *)memregs; |
39 | |
40 | if (memregs[0x1836>>1] == 0x2330) |
41 | { |
42 | printf("looks like this is MMSP2\n"); |
43 | ret = SOCID_MMSP2; |
44 | goto out; |
45 | } |
46 | |
47 | /* perform word reads. Byte reads might also work, |
48 | * but we don't want to play with that. */ |
49 | for (i = 0; i < 0x30; i += 4) |
50 | { |
51 | pollux_chipname[i >> 2] = memregl[(0x1f810 + i) >> 2]; |
52 | } |
53 | pollux_chipname_c[0x30] = 0; |
54 | |
55 | for (i = 0; i < 0x30; i++) |
56 | { |
57 | unsigned char c = pollux_chipname_c[i]; |
58 | if (c < 0x20 || c > 0x7f) |
59 | goto not_pollux_like; |
60 | } |
61 | |
62 | printf("found pollux-like id: \"%s\"\n", pollux_chipname_c); |
63 | |
64 | if (strncmp(pollux_chipname_c, "MAGICEYES-LEAPFROG-LF1000", 25) || |
65 | strncmp(pollux_chipname_c, "MAGICEYES-POLLUX", 16)) |
66 | { |
67 | ret = SOCID_POLLUX; |
68 | goto out; |
69 | } |
70 | |
71 | not_pollux_like: |
72 | out: |
73 | munmap((void *)memregs, 0x20000); |
74 | close(memdev); |
75 | gp2x_soc = ret; |
76 | return ret; |
77 | } |
78 | |