94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
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/* Parts used from cpuctrl */
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/* cpuctrl for GP2X
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Copyright (C) 2005 Hermes/PS2Reality
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <sys/mman.h>
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#include <sys/ioctl.h>
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#include <sys/soundcard.h>
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#include "../common.h"
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#include "gp2x.h"
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extern int main_cpuspeed(int argc, char *argv[]);
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extern SDL_Surface* screen;
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u32 gp2x_audio_volume = 74;
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u32 gpsp_gp2x_dev_audio = 0;
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u32 gpsp_gp2x_dev = 0;
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volatile u16 *gpsp_gp2x_memregs;
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volatile u32 *gpsp_gp2x_memregl;
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static volatile u16 *MEM_REG;
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s32 gp2x_load_mmuhack()
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{
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s32 mmufd = open("/dev/mmuhack", O_RDWR);
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if(mmufd < 0)
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{
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system("/sbin/insmod mmuhack.o");
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mmufd = open("/dev/mmuhack", O_RDWR);
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}
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if(mmufd < 0)
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return -1;
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close(mmufd);
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return 0;
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}
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void gp2x_overclock()
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{
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gpsp_gp2x_dev = open("/dev/mem", O_RDWR);
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gpsp_gp2x_dev_audio = open("/dev/mixer", O_RDWR);
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gpsp_gp2x_memregl =
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(unsigned long *)mmap(0, 0x10000, PROT_READ|PROT_WRITE, MAP_SHARED,
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gpsp_gp2x_dev, 0xc0000000);
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gpsp_gp2x_memregs = (unsigned short *)gpsp_gp2x_memregl;
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clear_screen(0);
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main_cpuspeed(0, NULL);
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gp2x_sound_volume(1);
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}
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void gp2x_quit()
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{
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munmap((void *)gpsp_gp2x_memregl, 0x10000);
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close(gpsp_gp2x_dev_audio);
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close(gpsp_gp2x_dev);
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chdir("/usr/gp2x");
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execl("gp2xmenu", "gp2xmenu", NULL);
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}
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void gp2x_sound_volume(u32 volume_up)
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{
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u32 volume;
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if((volume_up == 0) && (gp2x_audio_volume > 0))
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gp2x_audio_volume--;
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if((volume_up != 0) && (gp2x_audio_volume < 100))
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gp2x_audio_volume++;
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volume = (gp2x_audio_volume * 0x50) / 100;
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volume = (gp2x_audio_volume << 8) | gp2x_audio_volume;
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ioctl(gpsp_gp2x_dev_audio, SOUND_MIXER_WRITE_PCM, &volume);
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}
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