Add Xuelin iHIFI 770/770C/800 support

Taken from the xvortex fork (Roman Stolyarov)
Ported, rebased, and cleaned up by myself.

Change-Id: I7b2bca2d29502f2e4544e42f3d122786dd4b7978

1 files changed, 67 insertions, 0 deletions

diff --git a/firmware/target/arm/rk27xx/ihifi2/audio-ihifi800.c b/firmware/target/arm/rk27xx/ihifi2/audio-ihifi800.c
new file mode 100644
index 0000000000..14b126c72a
--- /dev/null
+++ b/firmware/target/arm/rk27xx/ihifi2/audio-ihifi800.c
@@ -0,0 +1,67 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2016 by Roman Stolyarov
+ *
+ * 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 "system.h"
+#include "kernel.h"
+#include "audiohw.h"
+#include "i2c-rk27xx.h"
+
+#define ES9018_I2C_ADDR    0x90
+
+static unsigned char buf;
+
+void es9018_write_reg(uint8_t reg, uint8_t val)
+{
+    buf = val;
+    i2c_write(ES9018_I2C_ADDR, reg, sizeof(buf), (void*)&buf);
+}
+
+uint8_t es9018_read_reg(uint8_t reg)
+{
+    i2c_read(ES9018_I2C_ADDR, reg, sizeof(buf), (void*)&buf);
+    return buf;
+}
+
+static void pop_ctrl(const int val)
+{
+    if (val)
+        GPIO_PADR |= (1<<7);
+    else
+        GPIO_PADR &= ~(1<<7);
+}
+
+void audiohw_postinit(void)
+{
+    pop_ctrl(0);
+    sleep(HZ/4);
+    audiohw_init();
+    sleep(HZ/2);
+    pop_ctrl(1);
+    sleep(HZ/4);
+    audiohw_unmute();
+}
+
+void audiohw_close(void)
+{
+    audiohw_mute();
+    pop_ctrl(0);
+    sleep(HZ/4);
+}