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restore some hw regs on exit to startup values

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@709 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2009-07-23 19:10:33 +00:00
parent d34a42f93f
commit 2275c67607
3 changed files with 42 additions and 16 deletions
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33
platform/gp2x/soc_mmsp2.c
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@ -33,7 +33,12 @@ static int touchcal[7] = { 6203, 0, -1501397, 0, -4200, 16132680, 65536 };
static const int gp2x_screenaddrs[4] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };
static int gp2x_screenaddrs_use[4];
static char gamma_was_changed = 0;
static char cpuclk_was_changed = 0;
static unsigned short gp2x_screenaddr_old[4];
static unsigned short memtimex_old[2];
static unsigned short reg0910;
/* video stuff */
@ -166,11 +171,11 @@ static void gp2x_set_cpuclk_(unsigned int mhz)
for (i = 0; i < 10000; i++)
if (!(gp2x_memregs[0x902>>1] & 1))
break;
cpuclk_was_changed = 1;
}
/* RAM timings */
static unsigned short memtimex[2];
#define TIMING_CHECK(t, adj, mask) \
t += adj; \
if (t & ~mask) \
@ -214,8 +219,8 @@ static void set_ram_timings_(void)
static void unset_ram_timings_(void)
{
gp2x_memregs[0x3802>>1] = memtimex[0];
gp2x_memregs[0x3804>>1] = memtimex[1] | 0x8000;
gp2x_memregs[0x3802>>1] = memtimex_old[0];
gp2x_memregs[0x3804>>1] = memtimex_old[1] | 0x8000;
printf("RAM timings reset to startup values.\n");
}
@ -344,6 +349,8 @@ static void set_lcd_gamma_(int g100, int A_SNs_curve)
gp2x_memregs[0x295E>>1]= s;
gp2x_memregs[0x295E>>1]= g;
}
gamma_was_changed = 1;
}
@ -454,12 +461,13 @@ void mmsp2_init(void)
memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs));
/* default LCD refresh */
/* save startup values: LCD refresh */
get_reg_setting(lcd_rate_defaults);
/* RAM timings */
memtimex[0] = gp2x_memregs[0x3802>>1];
memtimex[1] = gp2x_memregs[0x3804>>1];
/* CPU and RAM timings */
reg0910 = gp2x_memregs[0x0910>>1];
memtimex_old[0] = gp2x_memregs[0x3802>>1];
memtimex_old[1] = gp2x_memregs[0x3804>>1];
/* touchscreen */
touchdev = open("/dev/touchscreen/wm97xx", O_RDONLY);
@ -503,13 +511,20 @@ void mmsp2_finish(void)
pause940(1);
sharedmem940_finish();
gp2x_video_RGB_setscaling_(0, 320, 240);
gp2x_video_changemode_ll_(16);
gp2x_memregs[0x290E>>1] = gp2x_screenaddr_old[0];
gp2x_memregs[0x2910>>1] = gp2x_screenaddr_old[1];
gp2x_memregs[0x2912>>1] = gp2x_screenaddr_old[2];
gp2x_memregs[0x2914>>1] = gp2x_screenaddr_old[3];
unset_ram_timings_();
unset_lcd_custom_rate_();
if (gamma_was_changed)
set_lcd_gamma_(100, 0);
unset_ram_timings_();
if (cpuclk_was_changed)
gp2x_memregs[0x910>>1] = reg0910;
munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);
munmap((void *)gp2x_memregs, 0x10000);