32x: drc: first implementation finished, no more interpreter dep

[libpicofe.git] / gp2x / soc_pollux.c

diff --git a/gp2x/soc_pollux.c b/gp2x/soc_pollux.c
index 7b71324..3b2ca2d 100644 (file)
--- a/gp2x/soc_pollux.c
+++ b/gp2x/soc_pollux.c
@@ -1,3 +1,11 @@
+/*
+ * <random_info=mem_map>
+ * 00000000-029fffff linux (42MB)
+ * 02a00000-02dfffff fb (4MB, 153600B really used)
+ * 02e00000-02ffffff sound dma (2MB)
+ * 03000000-03ffffff MPEGDEC (?, 16MB)
+ * </random_info>
+ */
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -34,6 +42,17 @@ static unsigned int pllsetreg0;
 static int last_pal_setting = 0;
 
 
+/* misc */
+static void pollux_set_fromenv(const char *env_var)
+{
+       const char *set_string;
+       set_string = getenv(env_var);
+       if (set_string)
+               pollux_set(memregs, set_string);
+       else
+               printf("env var %s not defined.\n", env_var);
+}
+
 /* video stuff */
 static void pollux_video_flip(int buf_count)
 {
@@ -62,6 +81,7 @@ static void gp2x_video_changemode_ll_(int bpp)
        int code = 0, bytes = 2;
        int rot_cmd[2] = { 0, 0 };
        unsigned int r;
+       char buff[32];
        int ret;
 
        if (bpp == prev_bpp)
@@ -79,7 +99,8 @@ static void gp2x_video_changemode_ll_(int bpp)
        memregl[0x4000>>2] |= 1 << 3;
 
        /* the above ioctl resets LCD timings, so set them here */
-       set_lcd_custom_rate(last_pal_setting);
+       snprintf(buff, sizeof(buff), "POLLUX_LCD_TIMINGS_%s", last_pal_setting ? "PAL" : "NTSC");
+       pollux_set_fromenv(buff);
 
        switch (abs(bpp))
        {
@@ -141,17 +162,6 @@ static void gp2x_set_cpuclk_(unsigned int mhz)
        cpuclk_was_changed = 1;
 }
 
-/* misc */
-static void pollux_set_fromenv(const char *env_var)
-{
-       const char *set_string;
-       set_string = getenv(env_var);
-       if (set_string)
-               pollux_set(memregs, set_string);
-       else
-               printf("env var %s not defined.\n", env_var);
-}
-
 /* RAM timings */
 static void set_ram_timings_(void)
 {
@@ -175,10 +185,7 @@ static void unset_ram_timings_(void)
 /* LCD refresh */
 static void set_lcd_custom_rate_(int is_pal)
 {
-       char buff[32];
-
-       snprintf(buff, sizeof(buff), "POLLUX_LCD_TIMINGS_%s", is_pal ? "PAL" : "NTSC");
-       pollux_set_fromenv(buff);
+       /* just remember PAL/NTSC. We always set timings in _changemode_ll() */
        last_pal_setting = is_pal;
 }
 
@@ -208,6 +215,32 @@ static int gp2x_read_battery_(void)
        }
 }
 
+#define TIMER_BASE3 0x1980
+#define TIMER_REG(x) memregl[(TIMER_BASE3 + x) >> 2]
+
+unsigned int gp2x_get_ticks_us_(void)
+{
+       TIMER_REG(0x08) = 0x4b;  /* run timer, latch value */
+       return TIMER_REG(0);
+}
+
+unsigned int gp2x_get_ticks_ms_(void)
+{
+       /* approximate /= 1000 */
+       unsigned long long v64;
+       v64 = (unsigned long long)gp2x_get_ticks_us_() * 4294968;
+       return v64 >> 32;
+}
+
+static void timer_cleanup(void)
+{
+       TIMER_REG(0x40) = 0x0c; /* be sure clocks are on */
+       TIMER_REG(0x08) = 0x23; /* stop the timer, clear irq in case it's pending */
+       TIMER_REG(0x00) = 0;    /* clear counter */
+       TIMER_REG(0x40) = 0;    /* clocks off */
+       TIMER_REG(0x44) = 0;    /* dividers back to default */
+}
+
 void pollux_init(void)
 {
        struct fb_fix_screeninfo fbfix;
@@ -264,6 +297,14 @@ void pollux_init(void)
        if (battdev < 0)
                perror("Warning: could't open pollux_batt");
 
+       /* setup timer */
+       if (TIMER_REG(0x08) & 8)
+               timer_cleanup();
+
+       TIMER_REG(0x44) = 0x922; /* using PLL1, divider value 147 */
+       TIMER_REG(0x40) = 0x0c;  /* clocks on */
+       TIMER_REG(0x08) = 0x6b;  /* run timer, clear irq, latch value */
+
        pllsetreg0 = memregl[0xf004>>2];
        memtimex_old[0] = memregs[0x14802>>1];
        memtimex_old[1] = memregs[0x14804>>1];
@@ -284,6 +325,9 @@ void pollux_init(void)
        set_ram_timings = set_ram_timings_;
        unset_ram_timings = unset_ram_timings_;
        gp2x_read_battery = gp2x_read_battery_;
+
+       gp2x_get_ticks_ms = gp2x_get_ticks_ms_;
+       gp2x_get_ticks_us = gp2x_get_ticks_us_;
 }
 
 void pollux_finish(void)