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authorRafaël Carré <rafael.carre@gmail.com>2009-06-29 14:29:02 +0000
committerRafaël Carré <rafael.carre@gmail.com>2009-06-29 14:29:02 +0000
commit15a7f5e5e9495667e204cde8852b33587427911f (patch)
treebbb3f4f926b3bab2f91b2b07ac23f3634ff12e5e /firmware/target/arm
parente0640c3c4b6d238e38155c863e542335ce57a425 (diff)
downloadrockbox-15a7f5e5e9495667e204cde8852b33587427911f.tar.gz
rockbox-15a7f5e5e9495667e204cde8852b33587427911f.zip
Move PNX0101 timer code in the target tree
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21554 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/arm')
-rw-r--r--firmware/target/arm/pnx0101/timer-pnx0101.c82
-rw-r--r--firmware/target/arm/pnx0101/timer-target.h39
2 files changed, 121 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);
+}
diff --git a/firmware/target/arm/pnx0101/timer-target.h b/firmware/target/arm/pnx0101/timer-target.h
new file mode 100644
index 0000000000..853da07838
--- /dev/null
+++ b/firmware/target/arm/pnx0101/timer-target.h
@@ -0,0 +1,39 @@
+/***************************************************************************
+* __________ __ ___.
+* 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.
+*
+****************************************************************************/
+#ifndef TIMER_TARGET_H
+#define TIMER_TARGET_H
+
+bool __timer_set(long cycles, bool start);
+bool __timer_start(void);
+void __timer_stop(void);
+
+#define TIMER_FREQ 3000000
+
+#define __TIMER_SET(cycles, set) \
+ __timer_set(cycles, set)
+
+#define __TIMER_START() \
+ __timer_start()
+
+#define __TIMER_STOP(...) \
+ __timer_stop()
+
+#endif /* TIMER_TARGET_H */