Initial commit of the Samsung YP-R0 port.

This port is a hybrid native/RaaA port. It runs on a embedded linux system,
but is the only application. It therefore can implement lots of stuff that
native targets also implement, while leveraging the underlying linux kernel.

The port is quite advanced. User interface, audio playback, plugins work
mostly fine. Missing is e.g. power mangement and USB (see SamsungYPR0 wiki page).

Included in utils/ypr0tools are scripts and programs required to generate
a patched firmware. The patched firmware has the rootfs modified to load
Rockbox. It includes a early/safe USB mode.

This port needs a new toolchain, one that includes glibc headers and libraries.
rockboxdev.sh can generate it, but e.g. codesourcey and distro packages may
also work.

Most of the initial effort is done by Lorenzo Miori and others (on ABI),
including reverse engineering and patching of the original firmware,
initial drivers, and more. Big thanks to you.

Flyspray: FS#12348
Author: Lorenzo Miori, myself

Merry christmas to ypr0 owners! :)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31415 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 103 insertions, 0 deletions

diff --git a/firmware/target/hosted/ypr0/button-ypr0.c b/firmware/target/hosted/ypr0/button-ypr0.c
new file mode 100644
index 0000000000..4298410161
--- /dev/null
+++ b/firmware/target/hosted/ypr0/button-ypr0.c
@@ -0,0 +1,103 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: button-sdl.c 30482 2011-09-08 14:53:28Z kugel $
+ *
+ * Copyright (C) 2011 Lorenzo Miori
+ *
+ * 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 <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>         /* EXIT_SUCCESS */
+#include "config.h"
+#include "button.h"
+#include "kernel.h"
+#include "system.h"
+#include "button-target.h"
+
+/* R0 physical key codes */
+enum ypr0_buttons {
+    R0BTN_NONE = BUTTON_NONE,
+    R0BTN_POWER = 1,
+    R0BTN_UP,
+    R0BTN_DOWN,
+    R0BTN_RIGHT,
+    R0BTN_LEFT,
+    R0BTN_CENTRAL,
+    R0BTN_MENU,
+    R0BTN_BACK,
+    R0BTN_3DOTS = 11,
+};
+
+
+static int r0_btn_fd = 0;
+/* Samsung keypad driver doesn't allow multiple key combinations :( */
+static enum ypr0_buttons r0_read_key(void)
+{
+    unsigned char keys;
+
+    if (r0_btn_fd < 0)
+        return 0;
+
+    if (read(r0_btn_fd, &keys, 1))
+        return keys;
+
+    return 0;
+}
+
+/* Conversion from physical keypress code to logic key code */
+static int key_to_button(enum ypr0_buttons keyboard_button)
+{
+    switch (keyboard_button)
+    {
+        default:            return BUTTON_NONE;
+        case R0BTN_POWER:   return BUTTON_POWER;
+        case R0BTN_UP:      return BUTTON_UP;
+        case R0BTN_DOWN:    return BUTTON_DOWN;
+        case R0BTN_RIGHT:   return BUTTON_RIGHT;
+        case R0BTN_LEFT:    return BUTTON_LEFT;
+        case R0BTN_CENTRAL: return BUTTON_SELECT;
+        case R0BTN_MENU:    return BUTTON_MENU;
+        case R0BTN_BACK:    return BUTTON_BACK;
+        case R0BTN_3DOTS:   return BUTTON_USER;
+    }
+}
+
+int button_read_device(void)
+{
+    return key_to_button(r0_read_key());
+}
+
+
+/* Open the keypad device: it is offered by r0Btn.ko module */
+void button_init_device(void)
+{
+    r0_btn_fd = open("/dev/r0Btn", O_RDONLY);
+    if (r0_btn_fd < 0)
+        printf("/dev/r0Btn open error!");
+}
+
+#ifdef BUTTON_DRIVER_CLOSE
+/* I'm not sure it's called at shutdown...give a check! */
+void button_close_device(void)
+{
+    if (r0_btn_fd >= 0) {
+        close(r0_btn_fd);
+        printf("/dev/r0Btn closed!");
+    }
+}
+#endif /* BUTTON_DRIVER_CLOSE */