Introduce HiFi E.T MA9 port.

Change-Id: I79aadc958fd5222f26f91ed127f8c6fb2c465dc2

1 files changed, 115 insertions, 0 deletions

diff --git a/firmware/drivers/audio/df1704.c b/firmware/drivers/audio/df1704.c
new file mode 100644
index 0000000..b0b9d7b
--- /dev/null
+++ b/firmware/drivers/audio/df1704.c
@@ -0,0 +1,115 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2013 Andrew Ryabinin
+ *
+ * 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 "df1704.h"
+#include "config.h"
+#include "audio.h"
+#include "audiohw.h"
+
+static void df1704_write_reg(const int reg, const unsigned int value)
+{
+    int i;
+
+    df1704_set_ml_dir(0);
+    df1704_set_ml(1);
+    df1704_set_md(1);
+    df1704_set_mc(1);
+
+    for (i = (1<<15); i; i >>= 1) {
+        udelay(40);
+        df1704_set_mc(0);
+
+        if ((reg|value) & i) {
+            df1704_set_md(1);
+        } else {
+            df1704_set_md(0);
+        }
+
+        udelay(40);
+        df1704_set_mc(1);
+    }
+
+    df1704_set_ml(0);
+    udelay(130);
+    df1704_set_ml(1);
+    udelay(130);
+    df1704_set_ml_dir(1);
+}
+
+static int vol_tenthdb2hw(const int tdb)
+{
+    if (tdb < DF1704_VOLUME_MIN) {
+        return 0;
+    } else if (tdb > DF1704_VOLUME_MAX) {
+        return 0xff;
+    } else {
+        return (tdb/5+0xff);
+    }
+}
+
+
+void df1704_init(void)
+{
+    df1704_write_reg(DF1704_MODE(2),
+                     DF1704_OW_24     |
+                     DF1704_IW_16_I2S |
+                     DF1704_DEM_OFF   |
+                     DF1704_MUTE_OFF);
+    df1704_write_reg(DF1704_MODE(3),
+                     DF1704_CKO_HALF |
+                     DF1704_SRO_SHARP|
+                     DF1704_LRP_H    |
+                     DF1704_I2S_ON);
+}
+
+void df1704_mute(void)
+{
+    df1704_write_reg(DF1704_MODE(2),
+                     DF1704_OW_24     |
+                     DF1704_IW_16_I2S |
+                     DF1704_DEM_OFF   |
+                     DF1704_MUTE_ON);
+}
+
+void df1704_unmute(void)
+{
+    df1704_write_reg(DF1704_MODE(2),
+                     DF1704_OW_24     |
+                     DF1704_IW_16_I2S |
+                     DF1704_DEM_OFF   |
+                     DF1704_MUTE_OFF);
+}
+
+void audiohw_preinit(void)
+{
+}
+
+void audiohw_set_frequency(int fsel)
+{
+    (void)fsel;
+}
+
+void audiohw_set_volume(int vol_l, int vol_r)
+{
+    df1704_write_reg(DF1704_MODE(0), DF1704_LDL_ON|vol_tenthdb2hw(vol_l));
+    df1704_write_reg(DF1704_MODE(1), DF1704_LDR_ON|vol_tenthdb2hw(vol_r));
+}