From 3ec66893e377b088c1284d2d23adb2aeea6d7965 Mon Sep 17 00:00:00 2001
From: Aidan MacDonald <amachronic@protonmail.com>
Date: Sat, 27 Feb 2021 22:08:58 +0000
Subject: New port: FiiO M3K on bare metal

Change-Id: I7517e7d5459e129dcfc9465c6fbd708619888fbe
---
 firmware/target/mips/ingenic_x1000/timer-x1000.c | 85 ++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 firmware/target/mips/ingenic_x1000/timer-x1000.c

(limited to 'firmware/target/mips/ingenic_x1000/timer-x1000.c')

diff --git a/firmware/target/mips/ingenic_x1000/timer-x1000.c b/firmware/target/mips/ingenic_x1000/timer-x1000.c
new file mode 100644
index 0000000000..de97cbb3a3
--- /dev/null
+++ b/firmware/target/mips/ingenic_x1000/timer-x1000.c
@@ -0,0 +1,85 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2021 Aidan MacDonald
+ *
+ * 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.h"
+#include "x1000/tcu.h"
+
+#define TIMER_CHN 5
+
+bool timer_set(long cycles, bool start)
+{
+    if(cycles <= 0)
+        return false;
+
+    /* Calculate timer interval */
+    unsigned long counter = cycles;
+    unsigned prescale = 0;
+    while(counter > 0xffff && prescale < 5) {
+        counter /= 4;
+        prescale += 1;
+    }
+
+    /* Duration too long */
+    if(counter > 0xffff)
+        return false;
+
+    /* Unregister old function */
+    if(start && pfn_unregister) {
+        pfn_unregister();
+        pfn_unregister = 0;
+    }
+
+    /* Configure the timer */
+    jz_clr(TCU_STOP, 1 << TIMER_CHN);
+    jz_clr(TCU_ENABLE, 1 << TIMER_CHN);
+    jz_overwritef(TCU_CTRL(TIMER_CHN), SOURCE_V(EXT), PRESCALE(prescale));
+    jz_write(TCU_CMP_FULL(TIMER_CHN), counter);
+    jz_write(TCU_CMP_HALF(TIMER_CHN), 0);
+    jz_clr(TCU_FLAG, 1 << TIMER_CHN);
+    jz_clr(TCU_MASK, 1 << TIMER_CHN);
+
+    if(start)
+        return timer_start();
+    else
+        return true;
+}
+
+bool timer_start(void)
+{
+    jz_set(TCU_ENABLE, 1 << TIMER_CHN);
+    return true;
+}
+
+void timer_stop(void)
+{
+    jz_clr(TCU_ENABLE, 1 << TIMER_CHN);
+    jz_set(TCU_MASK, 1 << TIMER_CHN);
+    jz_clr(TCU_FLAG, 1 << TIMER_CHN);
+    jz_set(TCU_STOP, 1 << TIMER_CHN);
+}
+
+void TCU1(void)
+{
+    jz_clr(TCU_FLAG, 1 << TIMER_CHN);
+
+    if(pfn_timer)
+        pfn_timer();
+}
-- 
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