Moved implementation of user timer to the firmware layer, implemented it for iriver, and made it shareable based on priorities. On iriver, the user timer is shared between the backlight fading and other use, so if a plugin registers the timer, the backlight will resort to simple on/off switching until the plugin releases the timer again. Sorted and bumped the plugin api.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7242 a1c6a512-1295-4272-9138-f99709370657

apps/plugin.c

@@ -45,6 +45,7 @@
 #include "mp3data.h"
 #include "powermgmt.h"
 #include "system.h"
+#include "timer.h"
 #include "sound.h"
 #include "database.h"
 #if (CONFIG_HWCODEC == MASNONE)
@@ -74,9 +75,6 @@ extern unsigned char pluginbuf[];
 /* for actual plugins only, not for codecs */
 static bool plugin_loaded = false;
 static int  plugin_size = 0;
-#ifndef SIMULATOR
-static void (*pfn_timer)(void) = NULL; /* user timer handler */
-#endif
 static void (*pfn_tsr_exit)(void) = NULL; /* TSR exit callback */
 
 static int plugin_test(int api_version, int model, int memsize);
@@ -116,6 +114,14 @@ static const struct plugin_api rockbox_api = {
     lcd_fillrect,
     lcd_mono_bitmap_part,
     lcd_mono_bitmap,
+#if LCD_DEPTH > 1
+    lcd_set_foreground,
+    lcd_get_foreground,
+    lcd_set_background,
+    lcd_get_background,
+    lcd_bitmap_part,
+    lcd_bitmap,
+#endif
     lcd_putsxy,
     lcd_puts_style,
     lcd_puts_scroll_style,
@@ -126,6 +132,7 @@ static const struct plugin_api rockbox_api = {
     scrollbar,
     checkbox,
     font_get,
+    font_getstringsize,
 #endif
     backlight_on,
     backlight_off,
@@ -211,6 +218,9 @@ static const struct plugin_api rockbox_api = {
 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
     cpu_boost,
 #endif
+    timer_register,
+    timer_unregister,
+    timer_set_period,
 #endif
 
     /* strings and memory */
@@ -220,6 +230,7 @@ static const struct plugin_api rockbox_api = {
     strlen,
     strrchr,
     strcmp,
+    strncmp,
     strcasecmp,
     strncasecmp,
     memset,
@@ -289,6 +300,10 @@ static const struct plugin_api rockbox_api = {
     &tagdb_fd,
     &tagdb_initialized,
     tagdb_init,
+    /* runtime database */
+    &rundbheader,
+    &rundb_fd,
+    &rundb_initialized,            
 
     /* misc */
     srand,
@@ -299,13 +314,12 @@ static const struct plugin_api rockbox_api = {
     set_time,
     plugin_get_buffer,
     plugin_get_audio_buffer,
-#ifndef SIMULATOR
-    plugin_register_timer,
-    plugin_unregister_timer,
-#endif
     plugin_tsr,
 #if defined(DEBUG) || defined(SIMULATOR)
     debugf,
+#endif
+#ifdef ROCKBOX_HAS_LOGF
+    logf,
 #endif
     &global_settings,
     mp3info,
@@ -326,24 +340,6 @@ static const struct plugin_api rockbox_api = {
     /* new stuff at the end, sort into place next time
        the API gets incompatible */
 
-#ifdef ROCKBOX_HAS_LOGF
-    logf,
-#endif
-    &rundbheader,
-    &rundb_fd,
-    &rundb_initialized,            
-    strncmp,
-#if LCD_DEPTH > 1
-    lcd_set_foreground,
-    lcd_get_foreground,
-    lcd_set_background,
-    lcd_get_background,
-    lcd_bitmap_part,
-    lcd_bitmap,
-#endif
-#ifdef HAVE_LCD_BITMAP
-    font_getstringsize,
-#endif
 };
 
 int plugin_load(const char* plugin, void* parameter)
@@ -486,68 +482,6 @@ void* plugin_get_audio_buffer(int* buffer_size)
     return audiobuf;
 }
 
-#ifndef SIMULATOR
-/* Register a periodic time callback, called every "cycles" CPU clocks. 
-   Note that this function will be called in interrupt context! */
-int plugin_register_timer(int cycles, int prio, void (*timer_callback)(void))
-{
-    int phi = 0; /* bits for the prescaler */
-    int prescale = 1;
-
-    while (cycles > 0x10000)
-    {   /* work out the smallest prescaler that makes it fit */
-        phi++;
-        prescale *= 2;
-        cycles /= 2;
-    }
-
-    if (prescale > 8 || cycles == 0 || prio < 1 || prio > 15)
-        return 0; /* error, we can't do such period, bad argument */
-        
-    backlight_allow_timer(false); /* stop backlight from messing with the timer */
-#if CONFIG_CPU == SH7034
-    and_b(~0x10, &TSTR); /* Stop the timer 4 */
-    and_b(~0x10, &TSNC); /* No synchronization */
-    and_b(~0x10, &TMDR); /* Operate normally */
-
-    pfn_timer = timer_callback; /* install 2nd level ISR */
-
-    and_b(~0x01, &TSR4);
-    TIER4 = 0xF9; /* Enable GRA match interrupt */
-
-    GRA4 = (unsigned short)(cycles - 1);
-    TCR4 = 0x20 | phi; /* clear at GRA match, set prescaler */
-    IPRD = (IPRD & 0xFF0F) | prio << 4; /* interrupt priority */
-    or_b(0x10, &TSTR); /* start timer 4 */
-#else
-    pfn_timer = timer_callback;
-#endif
-    return cycles * prescale; /* return the actual period, in CPU clocks */
-}
-
-/* disable the user timer */
-void plugin_unregister_timer(void)
-{
-#if CONFIG_CPU == SH7034
-    and_b(~0x10, &TSTR); /* stop the timer 4 */
-    IPRD = (IPRD & 0xFF0F); /* disable interrupt */
-    pfn_timer = NULL;
-#endif
-    backlight_allow_timer(true);
-}
-
-#if CONFIG_CPU == SH7034
-/* interrupt handler for user timer */
-#pragma interrupt
-void IMIA4(void)
-{
-    if (pfn_timer != NULL)
-        pfn_timer(); /* call the user timer function */
-    and_b(~0x01, &TSR4); /* clear the interrupt */
-}
-#endif /* CONFIG_CPU == SH7034 */
-#endif /* #ifndef SIMULATOR */
-
 /* The plugin wants to stay resident after leaving its main function, e.g.
    runs from timer or own thread. The callback is registered to later 
    instruct it to free its resources before a new plugin gets loaded. */