RaySollium99/libpicofe
1
0
Fork 0
mirror of https://github.com/RaySollium99/libpicofe.git synced 2025-09-08 08:08:03 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

gp2x: pollux: bring back ram timings

Browse source
This commit is contained in:
notaz 2013-10-04 03:14:02 +03:00
parent 11166a22ce
commit 9a5a0dc9ff
3 changed files with 46 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

29
gp2x/soc_pollux.c
View file

@ -29,10 +29,12 @@
#include "soc.h"
#include "plat_gp2x.h"
#include "pollux_set.h"
#include "../plat.h"
static int battdev = -1, mixerdev = -1;
static int cpu_clock_allowed;
static unsigned short saved_memtimex[2];
static unsigned int saved_video_regs[2][6];
static unsigned int timer_drift; // count per real second
@ -59,6 +61,26 @@ static int decode_pll(unsigned int reg)
return v;
}
/* RAM timings */
static void set_ram_timings(void)
{
pollux_set_fromenv(memregs, "POLLUX_RAM_TIMINGS");
}
static void unset_ram_timings(void)
{
int i;
memregs[0x14802>>1] = saved_memtimex[0];
memregs[0x14804>>1] = saved_memtimex[1] | 0x8000;
for (i = 0; i < 0x100000; i++)
if (!(memregs[0x14804>>1] & 0x8000))
break;
printf("RAM timings reset to startup values.\n");
}
#define TIMER_BASE3 0x1980
#define TIMER_REG(x) memregl[(TIMER_BASE3 + x) >> 2]
@ -235,6 +257,11 @@ void pollux_init(void)
}
memregl = (volatile void *)memregs;
saved_memtimex[0] = memregs[0x14802>>1];
saved_memtimex[1] = memregs[0x14804>>1];
set_ram_timings();
// save video regs of both MLCs
save_multiple_regs(saved_video_regs[0], 0x4058, ARRAY_SIZE(saved_video_regs[0]));
save_multiple_regs(saved_video_regs[1], 0x4458, ARRAY_SIZE(saved_video_regs[1]));
@ -305,6 +332,8 @@ void pollux_finish(void)
{
timer_cleanup();
unset_ram_timings();
restore_multiple_regs(0x4058, saved_video_regs[0],
ARRAY_SIZE(saved_video_regs[0]));
restore_multiple_regs(0x4458, saved_video_regs[1],