restore some hw regs on exit to startup values

[libpicofe.git] / gp2x / soc_pollux.c

diff --git a/gp2x/soc_pollux.c b/gp2x/soc_pollux.c
index fb7e66f..6bea317 100644 (file)
--- a/gp2x/soc_pollux.c
+++ b/gp2x/soc_pollux.c
@@ -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);
 }