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/gpio-x1000.c | 84 +++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 firmware/target/mips/ingenic_x1000/gpio-x1000.c

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

diff --git a/firmware/target/mips/ingenic_x1000/gpio-x1000.c b/firmware/target/mips/ingenic_x1000/gpio-x1000.c
new file mode 100644
index 0000000000..a47865e397
--- /dev/null
+++ b/firmware/target/mips/ingenic_x1000/gpio-x1000.c
@@ -0,0 +1,84 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   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 "gpio-x1000.h"
+#include "kernel.h"
+
+#ifndef BOOTLOADER_SPL
+struct mutex gpio_z_mutex;
+#endif
+
+void gpio_init(void)
+{
+#ifndef BOOTLOADER_SPL
+    mutex_init(&gpio_z_mutex);
+#endif
+
+    /* Set all pins to input state */
+    for(int i = 0; i < 4; ++i) {
+        jz_clr(GPIO_INT(GPIO_Z), 0xffffffff);
+        jz_set(GPIO_MSK(GPIO_Z), 0xffffffff);
+        jz_set(GPIO_PAT1(GPIO_Z), 0xffffffff);
+        jz_clr(GPIO_PAT0(GPIO_Z), 0xffffffff);
+        REG_GPIO_Z_GID2LD = i;
+    }
+
+    /* Clear flag and disable pull resistor */
+    for(int i = 0; i < 4; ++i) {
+        jz_clr(GPIO_FLAG(i), 0xffffffff);
+        jz_set(GPIO_PULL(i), 0xffffffff);
+    }
+}
+
+void gpio_lock(void)
+{
+#ifndef BOOTLOADER_SPL
+    mutex_lock(&gpio_z_mutex);
+#endif
+}
+
+void gpio_unlock(void)
+{
+#ifndef BOOTLOADER_SPL
+    mutex_unlock(&gpio_z_mutex);
+#endif
+}
+
+void gpio_config(int port, unsigned pinmask, int func)
+{
+    unsigned intr = REG_GPIO_INT(port);
+    unsigned mask = REG_GPIO_MSK(port);
+    unsigned pat1 = REG_GPIO_PAT1(port);
+    unsigned pat0 = REG_GPIO_PAT0(port);
+
+    gpio_lock();
+    if(func & 8) jz_set(GPIO_INT(GPIO_Z), (intr & pinmask) ^ pinmask);
+    else         jz_clr(GPIO_INT(GPIO_Z), (~intr & pinmask) ^ pinmask);
+    if(func & 4) jz_set(GPIO_MSK(GPIO_Z), (mask & pinmask) ^ pinmask);
+    else         jz_clr(GPIO_MSK(GPIO_Z), (~mask & pinmask) ^ pinmask);
+    if(func & 2) jz_set(GPIO_PAT1(GPIO_Z), (pat1 & pinmask) ^ pinmask);
+    else         jz_clr(GPIO_PAT1(GPIO_Z), (~pat1 & pinmask) ^ pinmask);
+    if(func & 1) jz_set(GPIO_PAT0(GPIO_Z), (pat0 & pinmask) ^ pinmask);
+    else         jz_clr(GPIO_PAT0(GPIO_Z), (~pat0 & pinmask) ^ pinmask);
+    REG_GPIO_Z_GID2LD = port;
+    gpio_unlock();
+    gpio_set_pull(port, pinmask, func & 16);
+}
-- 
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