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Diffstat (limited to 'firmware/drivers/audio/cs4398.c')
-rw-r--r--firmware/drivers/audio/cs4398.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/firmware/drivers/audio/cs4398.c b/firmware/drivers/audio/cs4398.c
new file mode 100644
index 0000000000..35aa99d08c
--- /dev/null
+++ b/firmware/drivers/audio/cs4398.c
@@ -0,0 +1,41 @@
+/***************************************************************************
+ * __________ __ ___.
+ * 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 "cs4398.h"
+#include "config.h"
+#include "audio.h"
+#include "audiohw.h"
+#include "i2c.h"
+
+void cs4398_write_reg(uint8_t reg, uint8_t val)
+{
+ unsigned char buf[2] = {reg, val};
+ i2c_write(CS4398_I2C_ADDR, (unsigned char *)&buf, 2);
+}
+
+uint8_t cs4398_read_reg(uint8_t reg)
+{
+ unsigned char buf[2] = {reg, 0xff};
+ i2c_write(CS4398_I2C_ADDR, (unsigned char *)&buf[0], 1);
+ i2c_read(CS4398_I2C_ADDR, (unsigned char *)&buf[1], 1);
+ return buf[1];
+}