1 files changed, 83 insertions, 0 deletions

diff --git a/firmware/target/coldfire/iriver/h100/spdif-h100.c b/firmware/target/coldfire/iriver/h100/spdif-h100.c
new file mode 100644
index 0000000000..20e5bc3c45
--- /dev/null
+++ b/firmware/target/coldfire/iriver/h100/spdif-h100.c
@@ -0,0 +1,83 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Michal Sevakis
+ * Based on the work of Thom Johansen
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include <stdbool.h>
+#include "config.h"
+#include "cpu.h"
+#include "power.h"
+#include "system.h"
+#include "audio.h"
+#include "spdif.h"
+
+static int spdif_source = AUDIO_SRC_PLAYBACK;
+static int spdif_on     = false;
+
+/* Initialize the S/PDIF driver */
+void spdif_init(void)
+{
+    /* PHASECONFIG setup: gain = 3*2^13, source = EBUIN */
+    PHASECONFIG = (6 << 3) | (4 << 0);
+    spdif_set_output_source(AUDIO_SRC_PLAYBACK, true);
+}
+
+/* Return the S/PDIF frequency in herz - unrounded */
+unsigned long spdif_measure_frequency(void)
+{
+    /* The following formula is specified in MCF5249 user's manual section
+     * 17.6.1. The 128 divide is because of the fact that the SPDIF clock is
+     * the sample rate times 128.
+     */
+    return (unsigned long)((unsigned long long)FREQMEAS*CPU_FREQ /
+                                               ((1 << 15)*3*(1 << 13))/128);
+} /* spdif_measure_frequency */
+
+/* Set the S/PDIF audio feed */
+void spdif_set_output_source(int source, bool src_on)
+{
+    static const unsigned short ebu1_config[] =
+    {
+        /* SCLK2, TXSRC = PDOR3, validity, normal operation */
+        [AUDIO_SRC_PLAYBACK+1] = (7 << 12) | (3 << 8) | (1 << 5) | (5 << 2),
+        /* Input source is EBUin1, Feed-through monitoring */
+        [AUDIO_SRC_SPDIF+1]    =                                   (1 << 2),
+        /* SCLK2, TXSRC = IIS1recv, validity, normal operation */
+        [AUDIO_SRC_MIC+1]      = (7 << 12) | (4 << 8) | (1 << 5) | (5 << 2),
+        [AUDIO_SRC_LINEIN+1]   = (7 << 12) | (4 << 8) | (1 << 5) | (5 << 2),
+        [AUDIO_SRC_FMRADIO+1]  = (7 << 12) | (4 << 8) | (1 << 5) | (5 << 2),
+    };
+
+    if ((unsigned)source >= ARRAYLEN(ebu1_config))
+        source = AUDIO_SRC_PLAYBACK;
+
+    EBU1CONFIG = 0x800; /* Reset before reprogram */
+
+    spdif_source = source;
+    spdif_on     = spdif_powered() && src_on;
+
+    /* Tranceiver must be powered or else monitoring will be disabled */
+    EBU1CONFIG = spdif_on ? ebu1_config[source + 1] : 0;
+} /* spdif_set_output_source */
+
+/* Return the last set S/PDIF audio source */
+int spdif_get_output_source(bool *src_on)
+{
+    if (src_on != NULL)
+        *src_on = spdif_on;
+    return spdif_source;
+} /* spdif_get_output_source */