4d045184 |
1 | // vim:shiftwidth=2:expandtab |
2 | #include <sys/types.h> |
3 | #include <sys/stat.h> |
4 | #include <fcntl.h> |
5 | #include <unistd.h> |
6 | #include <sys/mman.h> |
7 | |
8 | #include "header.h" |
9 | #include "../common/warm.h" |
10 | #include "realfuncs.h" |
11 | |
12 | static int gpiodev = -1; |
13 | extern int memdev; // leasing from wiz_video |
14 | |
15 | int host_init(void) |
16 | { |
17 | gpiodev = open("/dev/GPIO", O_RDONLY); |
18 | if (gpiodev < 0) |
19 | perror(PFX "couldn't open /dev/GPIO"); |
20 | |
21 | return 0; |
22 | } |
23 | |
24 | int host_read_btns(void) |
25 | { |
26 | int r, value = 0; |
27 | |
28 | r = read(gpiodev, &value, 4); |
29 | if (value & 0x02) |
30 | value |= 0x05; |
31 | if (value & 0x08) |
32 | value |= 0x14; |
33 | if (value & 0x20) |
34 | value |= 0x50; |
35 | if (value & 0x80) |
36 | value |= 0x41; |
37 | |
38 | return value; |
39 | } |
40 | |
41 | void *host_mmap_upper(void) |
42 | { |
43 | void *ret; |
44 | int r; |
45 | |
46 | // Wiz GP2X |
47 | // <linux mem> 03460000-03ffffff 00ba0000 |
48 | // 02aa0000-02dfffff 03100000-0345ffff 00360000 |
49 | // <linux mem> 03000000-030fffff 00100000 |
50 | // 03000000-03ffffff 02000000-02ffffff 01000000 |
51 | ret = mmap((void *)0x82000000, 0x1000000, PROT_READ|PROT_WRITE|PROT_EXEC, |
52 | MAP_SHARED|MAP_FIXED, memdev, 0x3000000); |
53 | if (ret != (void *)0x82000000) |
54 | goto fail; |
55 | |
56 | ret = mmap((void *)0x83000000, 0x100000, PROT_READ|PROT_WRITE|PROT_EXEC, |
57 | MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, -1, 0); |
58 | if (ret != (void *)0x83000000) |
59 | goto fail; |
60 | |
61 | ret = mmap((void *)0x83100000, 0x360000, PROT_READ|PROT_WRITE|PROT_EXEC, |
62 | MAP_SHARED|MAP_FIXED, memdev, 0x2aa0000); |
63 | if (ret != (void *)0x83100000) |
64 | goto fail; |
65 | |
66 | ret = mmap((void *)0x83460000, 0xba0000, PROT_READ|PROT_WRITE|PROT_EXEC, |
67 | MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, -1, 0); |
68 | if (ret != (void *)0x83460000) |
69 | goto fail; |
70 | |
71 | r = warm_change_cb_range(WCB_B_BIT|WCB_C_BIT, 1, (void *)0x82000000, 0x1000000); |
72 | r |= warm_change_cb_range(WCB_B_BIT|WCB_C_BIT, 1, (void *)0x83100000, 0x360000); |
73 | if (r != 0) |
74 | err("could not make upper mem cacheable.\n"); |
75 | |
76 | return (void *)0x82000000; |
77 | |
78 | fail: |
79 | err("mmap %p: ", ret); |
80 | perror(NULL); |
81 | exit(1); |
82 | } |
83 | |