2823a4c8 |
1 | /* Parts used from cpuctrl */ |
2 | /* cpuctrl for GP2X |
3 | Copyright (C) 2005 Hermes/PS2Reality |
4 | |
5 | This program is free software; you can redistribute it and/or modify |
6 | it under the terms of the GNU General Public License as published by |
7 | the Free Software Foundation; either version 2 of the License, or |
8 | (at your option) any later version. |
9 | |
10 | This program is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | GNU General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU General Public License |
16 | along with this program; if not, write to the Free Software |
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
18 | |
19 | */ |
20 | |
21 | |
22 | #include <sys/mman.h> |
23 | #include <sys/ioctl.h> |
24 | #include <sys/soundcard.h> |
25 | #include "../common.h" |
26 | #include "gp2x.h" |
27 | |
28 | extern int main_cpuspeed(int argc, char *argv[]); |
29 | extern SDL_Surface* screen; |
30 | |
31 | u32 gp2x_audio_volume = 74; |
32 | u32 gpsp_gp2x_dev_audio = 0; |
33 | u32 gpsp_gp2x_dev = 0; |
34 | |
35 | volatile u16 *gpsp_gp2x_memregs; |
36 | volatile u32 *gpsp_gp2x_memregl; |
37 | |
38 | static volatile u16 *MEM_REG; |
39 | |
40 | s32 gp2x_load_mmuhack() |
41 | { |
42 | s32 mmufd = open("/dev/mmuhack", O_RDWR); |
43 | |
44 | if(mmufd < 0) |
45 | { |
46 | system("/sbin/insmod mmuhack.o"); |
47 | mmufd = open("/dev/mmuhack", O_RDWR); |
48 | } |
49 | |
50 | if(mmufd < 0) |
51 | return -1; |
52 | |
53 | close(mmufd); |
54 | return 0; |
55 | } |
56 | |
57 | void gp2x_overclock() |
58 | { |
59 | gpsp_gp2x_dev = open("/dev/mem", O_RDWR); |
60 | gpsp_gp2x_dev_audio = open("/dev/mixer", O_RDWR); |
61 | gpsp_gp2x_memregl = |
62 | (unsigned long *)mmap(0, 0x10000, PROT_READ|PROT_WRITE, MAP_SHARED, |
63 | gpsp_gp2x_dev, 0xc0000000); |
64 | gpsp_gp2x_memregs = (unsigned short *)gpsp_gp2x_memregl; |
65 | |
66 | clear_screen(0); |
67 | main_cpuspeed(0, NULL); |
68 | gp2x_sound_volume(1); |
69 | } |
70 | |
71 | void gp2x_quit() |
72 | { |
73 | munmap((void *)gpsp_gp2x_memregl, 0x10000); |
74 | close(gpsp_gp2x_dev_audio); |
75 | close(gpsp_gp2x_dev); |
76 | chdir("/usr/gp2x"); |
77 | execl("gp2xmenu", "gp2xmenu", NULL); |
78 | } |
79 | |
80 | void gp2x_sound_volume(u32 volume_up) |
81 | { |
82 | u32 volume; |
83 | if((volume_up == 0) && (gp2x_audio_volume > 0)) |
84 | gp2x_audio_volume--; |
85 | |
86 | if((volume_up != 0) && (gp2x_audio_volume < 100)) |
87 | gp2x_audio_volume++; |
88 | |
89 | volume = (gp2x_audio_volume * 0x50) / 100; |
90 | volume = (gp2x_audio_volume << 8) | gp2x_audio_volume; |
91 | ioctl(gpsp_gp2x_dev_audio, SOUND_MIXER_WRITE_PCM, &volume); |
92 | } |
93 | |