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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/platform@709 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2009-07-23 19:10:33 +00:00
parent 388947f33d
commit 71769e27e9
3 changed files with 42 additions and 16 deletions
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24
gp2x/soc_pollux.c
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@ -27,6 +27,10 @@ static unsigned int fb_paddr[fb_buf_count];
static int fb_work_buf;
static int fbdev = -1;
static char cpuclk_was_changed = 0;
static unsigned short memtimex_old[2];
static unsigned int pllsetreg0;
/* video stuff */
static void pollux_video_flip(int buf_count)
@ -110,6 +114,8 @@ static void gp2x_set_cpuclk_(unsigned int mhz)
char buff[24];
snprintf(buff, sizeof(buff), "cpuclk=%u", mhz);
pollux_set(memregs, buff);
cpuclk_was_changed = 1;
}
/* misc */
@ -124,8 +130,6 @@ static void pollux_set_fromenv(const char *env_var)
}
/* RAM timings */
static unsigned short memtimex[2];
static void set_ram_timings_(void)
{
pollux_set_fromenv("POLLUX_RAM_TIMINGS");
@ -135,8 +139,8 @@ static void unset_ram_timings_(void)
{
int i;
memregs[0x14802>>1] = memtimex[0];
memregs[0x14804>>1] = memtimex[1] | 0x8000;
memregs[0x14802>>1] = memtimex_old[0];
memregs[0x14804>>1] = memtimex_old[1] | 0x8000;
for (i = 0; i < 0x100000; i++)
if (!(memregs[0x14804>>1] & 0x8000))
@ -215,8 +219,9 @@ void pollux_init(void)
fb_work_buf = 0;
g_screen_ptr = gp2x_screens[0];
memtimex[0] = memregs[0x14802>>1];
memtimex[1] = memregs[0x14804>>1];
pllsetreg0 = memregl[0xf004];
memtimex_old[0] = memregs[0x14802>>1];
memtimex_old[1] = memregs[0x14804>>1];
gp2x_video_flip = gp2x_video_flip_;
gp2x_video_flip2 = gp2x_video_flip2_;
@ -243,6 +248,13 @@ void pollux_finish(void)
// wiz_lcd_set_portrait(0);
close(fbdev);
gp2x_video_changemode_ll_(16);
unset_ram_timings_();
if (cpuclk_was_changed) {
memregl[0xf004>>2] = pllsetreg0;
memregl[0xf07c>>2] |= 0x8000;
}
munmap((void *)memregs, 0x20000);
close(memdev);
}