Move PNX0101 timer code in the target tree

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21554 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 82 insertions, 0 deletions

diff --git a/firmware/target/arm/pnx0101/timer-pnx0101.c b/firmware/target/arm/pnx0101/timer-pnx0101.c
new file mode 100644
index 0000000000..6e685aa20f
--- /dev/null
+++ b/firmware/target/arm/pnx0101/timer-pnx0101.c
@@ -0,0 +1,82 @@
+/***************************************************************************
+*             __________               __   ___.
+*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+*                     \/            \/     \/    \/            \/
+* $Id$
+*
+* Copyright (C) 2007 Tomasz Malesinski
+*
+* This program is free software; you can redistribute it and/or
+* modify it under the terms of the GNU General Public License
+* as published by the Free Software Foundation; either version 2
+* of the License, or (at your option) any later version.
+*
+* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+* KIND, either express or implied.
+*
+****************************************************************************/
+
+#include "timer-target.h"
+#include "system.h"
+#include "timer.h"
+
+static long cycles_new = 0;
+
+void TIMER1_ISR(void)
+{
+    if (cycles_new > 0)
+    {
+        TIMER1.load = cycles_new - 1;
+        cycles_new = 0;
+    }
+    if (pfn_timer != NULL)
+    {
+        cycles_new = -1;
+        /* "lock" the variable, in case timer_set_period()
+         * is called within pfn_timer() */
+        pfn_timer();
+        cycles_new = 0;
+    }
+    TIMER1.clr = 1; /* clear the interrupt */
+}
+
+bool __timer_set(long cycles, bool start)
+{
+    if (start)
+    {
+        if (pfn_unregister != NULL)
+        {
+            pfn_unregister();
+            pfn_unregister = NULL;
+        }
+        TIMER1.ctrl &= ~0x80; /* disable the counter */
+        TIMER1.ctrl |= 0x40;  /* reload after counting down to zero */
+        TIMER1.ctrl &= ~0xc;  /* no prescaler */
+        TIMER1.clr = 1;       /* clear an interrupt event */
+    }
+    if (start || (cycles_new == -1)) /* within isr, cycles_new is "locked" */
+    {                                /* enable timer */
+        TIMER1.load = cycles - 1;
+        TIMER1.ctrl |= 0x80;        /* enable the counter */
+    }
+    else
+        cycles_new = cycles;
+
+    return true;
+}
+
+bool __timer_start(void)
+{
+    irq_set_int_handler(IRQ_TIMER1, TIMER1_ISR);
+    irq_enable_int(IRQ_TIMER1);
+    return true;
+}
+
+void __timer_stop(void)
+{
+    TIMER1.ctrl &= ~0x80;  /* disable timer 1 */
+    irq_disable_int(IRQ_TIMER1);
+}