1 files changed, 108 insertions, 0 deletions

diff --git a/firmware/target/arm/olympus/mrobe-500/timer-mr500.c b/firmware/target/arm/olympus/mrobe-500/timer-mr500.c
new file mode 100644
index 0000000000..cd3cec5663
--- /dev/null
+++ b/firmware/target/arm/olympus/mrobe-500/timer-mr500.c
@@ -0,0 +1,108 @@
+/***************************************************************************
+*             __________               __   ___.
+*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+*                     \/            \/     \/    \/            \/
+* $Id: $
+*
+* Copyright (C) 2007 by Karl Kurbjun
+*
+* All files in this archive are subject to the GNU General Public License.
+* See the file COPYING in the source tree root for full license agreement.
+*
+* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+* KIND, either express or implied.
+*
+****************************************************************************/
+
+#include "config.h"
+#include "cpu.h"
+#include "system.h"
+#include "timer.h"
+#include "logf.h"
+
+/* GPB0/TOUT0 should already have been configured as output so that pin
+   should not be a functional pin and TIMER0 output unseen there */
+void TIMER0(void)
+{
+    if (pfn_timer != NULL)
+        pfn_timer();
+}
+
+static void stop_timer(void)
+{
+}
+
+bool __timer_set(long cycles, bool start)
+{
+    /* taken from linux/arch/arm/mach-itdm320-20/time.c and timer-meg-fx.c */
+
+        /* Turn off all timers */
+/*      outw(CONFIG_TIMER0_TMMD_STOP, IO_TIMER0_TMMD);
+        outw(CONFIG_TIMER1_TMMD_STOP, IO_TIMER1_TMMD);
+        outw(CONFIG_TIMER2_TMMD_STOP, IO_TIMER2_TMMD);
+        outw(CONFIG_TIMER3_TMMD_STOP, IO_TIMER3_TMMD);
+ */
+        /* Turn Timer0 to Free Run mode */
+//      outw(CONFIG_TIMER0_TMMD_FREE_RUN, IO_TIMER0_TMMD);
+
+    bool retval = false;
+
+    /* Find the minimum factor that puts the counter in range 1-65535 */
+    unsigned int prescaler = (cycles + 65534) / 65535;
+
+    /* Test this by writing 1's to registers to see how many bits we have */
+    /* Maximum divider setting is x / 1024 / 65536 = x / 67108864 */
+    {
+        int oldlevel;
+        unsigned int divider;
+
+        if (start && pfn_unregister != NULL)
+        {
+            pfn_unregister();
+            pfn_unregister = NULL;
+        }
+
+        oldlevel = set_irq_level(HIGHEST_IRQ_LEVEL);
+
+        /* Max prescale is 1023+1 */
+        for (divider = 0; prescaler > 1024; prescaler >>= 1, divider++);
+
+        /* Setup the Prescalar */
+        outw(prescaler, IO_TIMER0_TMPRSCL);
+
+        /* Setup the Divisor */
+        outw(divider, IO_TIMER0_TMDIV);
+
+        set_irq_level(oldlevel);
+
+        retval = true;
+    }
+
+    return retval;
+}
+
+bool __timer_register(void)
+{
+    bool retval = true;
+
+    int oldstatus = set_interrupt_status(IRQ_FIQ_DISABLED, IRQ_FIQ_STATUS);
+
+    stop_timer();
+
+    /* Turn Timer0 to Free Run mode */
+        outw(0x0002, IO_TIMER0_TMMD);
+
+    set_interrupt_status(oldstatus, IRQ_FIQ_STATUS);
+
+    return retval;
+}
+
+void __timer_unregister(void)
+{
+    int oldstatus = set_interrupt_status(IRQ_FIQ_DISABLED, IRQ_FIQ_STATUS);
+    stop_timer();
+    set_interrupt_status(oldstatus, IRQ_FIQ_STATUS);
+}