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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
/*
* GP2X: Hardware Stuff.
* Thanks to Rlyeh, Snaff, Squidge, Hermes, PS2Reality and RobBrown
* for there help with us all getting to grips with this.
*
*/
#include "gp2x-common.h"
#include "gp2x-hw.h"
#include "gp2x-mem.h"
// Linux includes to let us goof about with the system in a 'standard' way.
#include <fcntl.h>
#include <pthread.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/soundcard.h>
#include <sys/time.h>
#include <unistd.h>
/* system registers */
static struct
{
unsigned short SYSCLKENREG,SYSCSETREG,FPLLVSETREG,DUALINT920,DUALINT940,DUALCTRL940;
}
system_reg;
static unsigned short dispclockdiv;
static volatile unsigned short *MEM_REG;
#define SYS_CLK_FREQ 7372800
void GP2X_device_init() {
// Open devices
if (!gp2x_dev[0]) gp2x_dev[0] = open("/dev/mixer", O_RDWR);
if (!gp2x_dev[1]) gp2x_dev[1] = open("/dev/batt", O_RDONLY);
if (!gp2x_dev[2]) gp2x_dev[2] = open("/dev/mem", O_RDWR);
}
void GP2X_device_deinit() {
// Close devices
{
int i;
for (i=0;i<8;i++)
{
if (gp2x_dev[i])
{
close(gp2x_dev[i]);
}
}
}
MEM_REG[0x91c>>1] = system_reg.SYSCSETREG;
MEM_REG[0x910>>1] = system_reg.FPLLVSETREG;
MEM_REG[0x3B40>>1] = system_reg.DUALINT920;
MEM_REG[0x3B42>>1] = system_reg.DUALINT940;
MEM_REG[0x3B48>>1] = system_reg.DUALCTRL940;
MEM_REG[0x904>>1] = system_reg.SYSCLKENREG;
MEM_REG[0x924>>1] = dispclockdiv;
unpatchMMU();
}
// Vairous mixer level fudges.
// TODO: Clean up and merge quick hacks.
void GP2X_mixer_set_volume(int L /*0..100*/, int R /*0..100*/) {
/* Set an arbitrary percentage value for the hardware mixer volume.
Parameters:
L (0..100) - volume percentage for the left channel
R (0..100) - volume percentage for the right channel
Note:
- A higher percentage than 100 will distort your sound.
*/
unsigned char temp[4];
if (L < 0) L = 0;
if (L > GP2X_MAXVOL) L = GP2X_MAXVOL;
if (R < 0) R = 0;
if (R > GP2X_MAXVOL) R = GP2X_MAXVOL;
temp[0]=(unsigned char)L;
temp[1]=(unsigned char)R;
temp[2]=temp[3]=0;
//warning("GP2X_mixer_set_volume is about to set %d %d", L, R);
ioctl(gp2x_dev[0], SOUND_MIXER_WRITE_PCM, temp);
}
int GP2X_mixer_get_volume() {
int vol;
ioctl(gp2x_dev[0], SOUND_MIXER_READ_PCM, &vol);
//warning("GP2X_mixer_get_volume returned %d %d", (int)((vol & 0xff)), (int)((vol >> 8) & 0xff));
return (int)((vol & 0xff));
}
void GP2X_mixer_move_volume(int UpDown) {
// Raise volume 5% if 1 passed, lower 5% if 0.
int curvol, newvol;
ioctl(gp2x_dev[0], SOUND_MIXER_READ_PCM, &curvol);
curvol = ((int)((curvol & 0xff)));
newvol = ((int)((curvol & 0xff)));
//warning("GP2X_mixer_move_volume got current volume @ %d", curvol);
if (UpDown == 1) {
newvol = (curvol + 5);
} else if (UpDown == 0) {
newvol = (curvol - 5);
}
//warning("GP2X_mixer_move_volume is about to set volume @ %d", newvol);
GP2X_mixer_set_volume(newvol, newvol);
return;
}
void GP2X_setCpuspeed(unsigned int mhz)
{
set_FCLK(mhz);
set_DCLK_Div(0);
set_920_Div(0);
}
int GP2X_getBattLevel() {
int devbatt;
unsigned short currentval=0;
devbatt = open("/dev/batt", O_RDONLY);
read (devbatt, ¤tval, 2);
close (devbatt);
return (currentval);
}
void set_display_clock_div(unsigned div)
{
div=((div & 63) | 64)<<8;
MEM_REG[0x924>>1]=(MEM_REG[0x924>>1] & ~(255<<8)) | div;
}
void set_FCLK(unsigned MHZ)
{
unsigned v;
unsigned mdiv,pdiv=3,scale=0;
MHZ*=1000000;
mdiv=(MHZ*pdiv)/SYS_CLK_FREQ;
mdiv=((mdiv-8)<<8) & 0xff00;
pdiv=((pdiv-2)<<2) & 0xfc;
scale&=3;
v=mdiv | pdiv | scale;
MEM_REG[0x910>>1]=v;
}
void set_920_Div(unsigned short div)
{
unsigned short v;
v = MEM_REG[0x91c>>1] & (~0x3);
MEM_REG[0x91c>>1] = (div & 0x7) | v;
}
void set_DCLK_Div( unsigned short div )
{
unsigned short v;
v = (unsigned short)( MEM_REG[0x91c>>1] & (~(0x7 << 6)) );
MEM_REG[0x91c>>1] = ((div & 0x7) << 6) | v;
}
void Disable_940(void)
{
MEM_REG[0x3B42>>1];
MEM_REG[0x3B42>>1]=0;
MEM_REG[0x3B46>>1]=0xffff;
MEM_REG[0x3B48>>1]|= (1 << 7);
MEM_REG[0x904>>1]&=0xfffe;
}
void gp2x_video_wait_vsync(void)
{
MEM_REG[0x2846>>1]=(MEM_REG[0x2846>>1] | 0x20) & ~2;
while (!(MEM_REG[0x2846>>1] & 2));
}
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