Initial commit for the Sony NWZ linux port

SUPPORTED SERIES:
- NWZ-E450
- NWZ-E460
- NWZ-E470
- NWZ-E580
- NWZ-A10

NOTES:
- bootloader makefile convert an extra font to be installed alongside the bootloader
  since sysfont is way too small
- the toolsicon bitmap comes from the Oxygen iconset
- touchscreen driver is untested

TODO:
- implement audio routing driver (pcm is handled by pcm-alsa)
- fix playback: it crashes on illegal instruction in DEBUG builds
- find out why the browser starts at / instead of /contents
- implement radio support
- implement return to OF for usb handling
- calibrate battery curve (NB: of can report a battery level on a 0-5 scale but
  probabl don't want to use that ?)
- implement simulator build (we need a nice image of the player)
- figure out if we can detect jack removal

POTENTIAL TODOS:
- try to build a usb serial gadget and gdbserver

Change-Id: Ic77d71e0651355d47cc4e423a40fb64a60c69a80

1 files changed, 63 insertions, 0 deletions

diff --git a/firmware/target/hosted/sonynwz/adc-nwz.c b/firmware/target/hosted/sonynwz/adc-nwz.c
new file mode 100644
index 0000000000..d981ead9eb
--- /dev/null
+++ b/firmware/target/hosted/sonynwz/adc-nwz.c
@@ -0,0 +1,63 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2016 by Amaury Pouly
+ *
+ * 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 "adc.h"
+#include "adc-target.h"
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
+static int adc_fd = -1; /* file descriptor */
+
+static const char *nwz_adc_channel_name[NWZ_ADC_MAX_CHAN + 1] =
+{
+    [NWZ_ADC_VCCBAT] = "VCCBAT",
+    [NWZ_ADC_VCCVBUS] = "VCCBUS",
+    [NWZ_ADC_ADIN3] = "ADIN3",
+    [NWZ_ADC_ADIN4] = "ADIN4",
+    [NWZ_ADC_ADIN5] = "ADIN5",
+    [NWZ_ADC_ADIN6] = "ADIN6",
+    [NWZ_ADC_ADIN7] = "ADIN7",
+    [NWZ_ADC_ADIN8] = "ADIN8"
+};
+
+void adc_init(void)
+{
+    adc_fd = open(NWZ_ADC_DEV, O_RDONLY);
+}
+
+unsigned short adc_read(int channel)
+{
+    unsigned char val;
+    if(ioctl(adc_fd, NWZ_ADC_GET_VAL(channel), &val) < 0)
+        return 0;
+    else
+        return val;
+}
+
+const char *adc_name(int channel)
+{
+    if(channel < NWZ_ADC_MIN_CHAN || channel > NWZ_ADC_MAX_CHAN)
+        return "";
+    return nwz_adc_channel_name[channel];
+}
+