xDuoo X3II and X20 port

Provided by Roman Stolyarov
Integration, Refactoring, and Upstreaming by Solomon Peachy

X3II confirmed working by forum tester, X20 is nearly identical.

This includes bootloader, main firmware, and the flash image patcher.

Eventual Todo:

 * Further refactor AGPTek Rocker & xduoo hiby bootloaders
 * Further refactor AGPTek Rocker & xduoo hosted platform code

Change-Id: I34a674051d368efcc75d1d18c725971fe46c3eee

1 files changed, 184 insertions, 0 deletions

diff --git a/firmware/target/hosted/system-hosted.c b/firmware/target/hosted/system-hosted.c
new file mode 100644
index 0000000000..7f0949daf2
--- /dev/null
+++ b/firmware/target/hosted/system-hosted.c
@@ -0,0 +1,184 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2017 Marcin Bukat
+ * Copyright (C) 2016 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 <unistd.h>
+#include <signal.h>
+#include <string.h>
+#include <ucontext.h>
+#include <backtrace.h>
+
+#include "system.h"
+#include "mv.h"
+#include "font.h"
+#include "power.h"
+#include "button.h"
+#include "backlight-target.h"
+#include "lcd.h"
+
+/* to make thread-internal.h happy */
+uintptr_t *stackbegin;
+uintptr_t *stackend;
+
+static void sig_handler(int sig, siginfo_t *siginfo, void *context)
+{
+    /* safe guard variable - we call backtrace() only on first
+     * UIE call. This prevent endless loop if backtrace() touches
+     * memory regions which cause abort
+     */
+    static bool triggered = false;
+
+    lcd_set_backdrop(NULL);
+    lcd_set_drawmode(DRMODE_SOLID);
+    lcd_set_foreground(LCD_BLACK);
+    lcd_set_background(LCD_WHITE);
+    unsigned line = 0;
+
+    lcd_setfont(FONT_SYSFIXED);
+    lcd_set_viewport(NULL);
+    lcd_clear_display();
+
+    /* get context info */
+    ucontext_t *uc = (ucontext_t *)context;
+    unsigned long pc = uc->uc_mcontext.pc;
+    unsigned long sp = uc->uc_mcontext.gregs[29];
+
+    lcd_putsf(0, line++, "%s at %08x", strsignal(sig), pc);
+
+    if(sig == SIGILL || sig == SIGFPE || sig == SIGSEGV || sig == SIGBUS || sig == SIGTRAP)
+        lcd_putsf(0, line++, "address 0x%08x", siginfo->si_addr);
+
+    if(!triggered)
+    {
+        triggered = true;
+        rb_backtrace(pc, sp, &line);
+    }
+
+#ifdef ROCKBOX_HAS_LOGF
+    lcd_putsf(0, line++, "logf:");
+    logf_panic_dump(&line);
+#endif
+
+    lcd_update();
+
+    system_exception_wait(); /* If this returns, try to reboot */
+    system_reboot();
+    while (1);       /* halt */
+}
+
+void power_off(void)
+{
+    system("/sbin/poweroff");
+}
+
+void system_init(void)
+{
+    int *s;
+    /* fake stack, to make thread-internal.h happy */
+    stackbegin = stackend = (uintptr_t*)&s;
+   /* catch some signals for easier debugging */
+    struct sigaction sa;
+    sigfillset(&sa.sa_mask);
+    sa.sa_flags = SA_SIGINFO;
+    sa.sa_sigaction = &sig_handler;
+    sigaction(SIGILL, &sa, NULL);
+    sigaction(SIGABRT, &sa, NULL);
+    sigaction(SIGFPE, &sa, NULL);
+    sigaction(SIGSEGV, &sa, NULL);
+    sigaction(SIGPIPE, &sa, NULL);
+    sigaction(SIGTERM, &sa, NULL);
+    sigaction(SIGBUS, &sa, NULL);
+    sigaction(SIGTERM, &sa, NULL);
+}
+
+void system_reboot(void)
+{
+    system("/sbin/reboot");
+}
+
+void system_exception_wait(void)
+{
+    backlight_hw_on();
+    backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
+    /* wait until button press and release */
+    while(button_read_device() != 0) {}
+    while(button_read_device() == 0) {}
+    while(button_read_device() != 0) {}
+    while(button_read_device() == 0) {}
+}
+
+bool hostfs_removable(IF_MD_NONVOID(int drive))
+{
+#ifdef HAVE_MULTIDRIVE
+    if (drive > 0) /* Active LOW */
+        return true;
+    else
+#endif
+        return false; /* internal: always present */
+}
+
+bool hostfs_present(IF_MD_NONVOID(int drive))
+{
+#ifdef HAVE_MULTIDRIVE
+    if (drive > 0) /* Active LOW */
+        return true; //FIXME
+    else
+#endif
+        return true; /* internal: always present */
+}
+
+#ifdef HAVE_MULTIDRIVE
+int volume_drive(int drive)
+{
+    return drive;
+}
+#endif /* HAVE_MULTIDRIVE */
+
+#ifdef CONFIG_STORAGE_MULTI
+int hostfs_driver_type(int drive)
+{
+    return drive > 0 ? STORAGE_SD_NUM : STORAGE_HOSTFS_NUM;
+}
+#endif /* CONFIG_STORAGE_MULTI */
+
+int hostfs_init(void)
+{
+    return 0;
+}
+
+int hostfs_flush(void)
+{
+    sync();
+    return 0;
+}
+
+#ifdef HAVE_HOTSWAP
+bool volume_removable(int volume)
+{
+    /* don't support more than one partition yet, so volume == drive */
+    return hostfs_removable(volume);
+}
+
+bool volume_present(int volume)
+{
+    /* don't support more than one partition yet, so volume == drive */
+    return hostfs_present(volume);
+}
+#endif
+