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

3 files changed, 559 insertions, 2 deletions

diff --git a/bootloader/SOURCES b/bootloader/SOURCES
index ce73724f69..82ddcb80b9 100644
--- a/bootloader/SOURCES
+++ b/bootloader/SOURCES
@@ -78,6 +78,8 @@ mpio_hd200_hd300.c
 nwz_linux.c
 #elif defined(AGPTEK_ROCKER)
 rocker_linux.c
+#elif (defined(XDUOO_X3II) || defined(XDUOO_X20))
+xduoo_linux.c
 #elif defined(RK27_GENERIC) || defined(HM60X) || defined(HM801) \
       || defined(MA9) || defined(MA9C) || defined(MA8) || defined(MA8C) \
       || defined(IHIFI760) || defined(IHIFI960) || defined(IHIFI800) \
diff --git a/bootloader/rocker_linux.c b/bootloader/rocker_linux.c
index cb0e5b66e5..80b3bfbab5 100644
--- a/bootloader/rocker_linux.c
+++ b/bootloader/rocker_linux.c
@@ -12,7 +12,7 @@
  *
  * Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
  * and the ipodlinux bootloader by Daniel Palffy and Bernard Leach
- * 
+ *
  * 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
@@ -464,7 +464,7 @@ static int open_log(void)
         return fd;
     close(fd);
     /* move file */
-    rename("/mnt/sd_0/rockbox.log", "/mnt_sd0/rockbox.log.1");
+    rename("/mnt/sd_0/rockbox.log", "/mnt_sd_0/rockbox.log.1");
     /* re-open the file, truncate in case the move was unsuccessful */
     return open("/mnt/sd_0/rockbox.log", O_RDWR | O_CREAT | O_APPEND | O_TRUNC);
 }
diff --git a/bootloader/xduoo_linux.c b/bootloader/xduoo_linux.c
new file mode 100644
index 0000000000..1071c6dc9b
--- /dev/null
+++ b/bootloader/xduoo_linux.c
@@ -0,0 +1,555 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ *
+ * Copyright (C) 2016 by Amaury Pouly
+ *               2018 by Marcin Bukat
+ *               2018 by Roman Stolyarov
+ *
+ * Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
+ * and the ipodlinux bootloader by Daniel Palffy and Bernard Leach
+ *
+ * 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 "lcd.h"
+#include "backlight.h"
+#include "button-target.h"
+#include "button.h"
+#include "../kernel/kernel-internal.h"
+#include "core_alloc.h"
+#include "filesystem-app.h"
+#include "lcd.h"
+#include "font.h"
+#include "power.h"
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <sys/wait.h>
+#include <stdarg.h>
+#include "version.h"
+
+/* all images must have the following size */
+#define ICON_WIDTH  130
+#define ICON_HEIGHT 130
+
+/* images */
+#include "bitmaps/rockboxicon.h"
+#include "bitmaps/hibyicon.h"
+#include "bitmaps/toolsicon.h"
+
+/* don't issue an error when parsing the file for dependencies */
+#if defined(BMPWIDTH_rockboxicon) && (BMPWIDTH_rockboxicon != ICON_WIDTH || \
+    BMPHEIGHT_rockboxicon != ICON_HEIGHT)
+#error rockboxicon has the wrong resolution
+#endif
+#if defined(BMPWIDTH_hibyicon) && (BMPWIDTH_hibyicon != ICON_WIDTH || \
+    BMPHEIGHT_hibyicon != ICON_HEIGHT)
+#error hibyicon has the wrong resolution
+#endif
+#if defined(BMPWIDTH_toolsicon) && (BMPWIDTH_toolsicon != ICON_WIDTH || \
+    BMPHEIGHT_toolsicon != ICON_HEIGHT)
+#error toolsicon has the wrong resolution
+#endif
+
+#ifndef BUTTON_UP
+#define BUTTON_UP    BUTTON_PREV
+#endif
+#ifndef BUTTON_DOWN
+#define BUTTON_DOWN  BUTTON_NEXT
+#endif
+#ifndef BUTTON_ENTER
+#define BUTTON_ENTER BUTTON_PLAY
+#endif
+
+/* return icon y position (x is always centered) */
+static int get_icon_y(void)
+{
+    int h;
+    lcd_getstringsize("X", NULL, &h);
+    return ((LCD_HEIGHT - ICON_HEIGHT)/2) - h;
+}
+
+/* Important Note: this bootloader is carefully written so that in case of
+ * error, the OF is run. This seems like the safest option since the OF is
+ * always there and might do magic things. */
+
+enum boot_mode
+{
+    BOOT_ROCKBOX,
+    BOOT_TOOLS,
+    BOOT_OF,
+    BOOT_COUNT,
+    BOOT_USB, /* special */
+    BOOT_STOP, /* power down/suspend */
+};
+
+static void display_text_center(int y, const char *text)
+{
+    int width;
+    lcd_getstringsize(text, &width, NULL);
+    lcd_putsxy(LCD_WIDTH / 2 - width / 2, y, text);
+}
+
+static void display_text_centerf(int y, const char *format, ...)
+{
+    char buf[1024];
+    va_list ap;
+    va_start(ap, format);
+
+    vsnprintf(buf, sizeof(buf), format, ap);
+    display_text_center(y, buf);
+}
+
+/* get timeout before taking action if the user doesn't touch the device */
+static int get_inactivity_tmo(void)
+{
+#if defined(HAS_BUTTON_HOLD)
+    if(button_hold())
+        return 5 * HZ; /* Inactivity timeout when on hold */
+    else
+#endif
+        return 10 * HZ; /* Inactivity timeout when not on hold */
+}
+
+/* return action on idle timeout */
+static enum boot_mode inactivity_action(enum boot_mode cur_selection)
+{
+#if defined(HAS_BUTTON_HOLD)
+    if(button_hold())
+        return BOOT_STOP; /* power down/suspend */
+    else
+#endif
+        return cur_selection; /* return last choice */
+}
+
+/* we store the boot mode in a file in /tmp so we can reload it between 'boots'
+ * (since the mostly suspends instead of powering down) */
+static enum boot_mode load_boot_mode(enum boot_mode mode)
+{
+    int fd = open("/data/rb_bl_mode.txt", O_RDONLY);
+    if(fd >= 0)
+    {
+        read(fd, &mode, sizeof(mode));
+        close(fd);
+    }
+    return mode;
+}
+
+static void save_boot_mode(enum boot_mode mode)
+{
+    int fd = open("/data/rb_bl_mode.txt", O_RDWR | O_CREAT | O_TRUNC);
+    if(fd >= 0)
+    {
+        write(fd, &mode, sizeof(mode));
+        close(fd);
+    }
+}
+
+static enum boot_mode get_boot_mode(void)
+{
+    /* load previous mode, or start with rockbox if none */
+    enum boot_mode init_mode = load_boot_mode(BOOT_ROCKBOX);
+    /* wait for user action */
+    enum boot_mode mode = init_mode;
+    int last_activity = current_tick;
+#if defined(HAS_BUTTON_HOLD)
+    bool hold_status = button_hold();
+#endif
+    while(true)
+    {
+        /* on usb detect, return to usb
+         * FIXME this is a hack, we need proper usb detection */
+        if(power_input_status() & POWER_INPUT_USB_CHARGER)
+        {
+            /* save last choice */
+            save_boot_mode(mode);
+            return BOOT_USB;
+        }
+        /* inactivity detection */
+        int timeout = last_activity + get_inactivity_tmo();
+        if(TIME_AFTER(current_tick, timeout))
+        {
+            /* save last choice */
+            save_boot_mode(mode);
+            return inactivity_action(mode);
+        }
+        /* redraw */
+        lcd_clear_display();
+        /* display top text */
+#if defined(HAS_BUTTON_HOLD)
+        if(button_hold())
+        {
+            lcd_set_foreground(LCD_RGBPACK(255, 0, 0));
+            display_text_center(0, "ON HOLD!");
+        }
+        else
+#endif
+        {
+            lcd_set_foreground(LCD_RGBPACK(255, 201, 0));
+            display_text_center(0, "SELECT PLAYER");
+        }
+        lcd_set_foreground(LCD_RGBPACK(255, 201, 0));
+        /* display icon */
+        const struct bitmap *icon = (mode == BOOT_OF) ? &bm_hibyicon :
+            (mode == BOOT_ROCKBOX) ? &bm_rockboxicon : &bm_toolsicon;
+        lcd_bmp(icon, (LCD_WIDTH - ICON_WIDTH) / 2, get_icon_y());
+        /* display bottom description */
+        const char *desc = (mode == BOOT_OF) ? "HIBY PLAYER" :
+            (mode == BOOT_ROCKBOX) ? "ROCKBOX" : "TOOLS";
+
+        int desc_height;
+        lcd_getstringsize(desc, NULL, &desc_height);
+        display_text_center(LCD_HEIGHT - 3*desc_height, desc);
+
+        /* display arrows */
+        int arrow_width, arrow_height;
+        lcd_getstringsize("<", &arrow_width, &arrow_height);
+        int arrow_y = get_icon_y() + ICON_HEIGHT / 2 - arrow_height / 2;
+        lcd_putsxy(arrow_width / 2, arrow_y, "<");
+        lcd_putsxy(LCD_WIDTH - 3 * arrow_width / 2, arrow_y, ">");
+
+        lcd_set_foreground(LCD_RGBPACK(0, 255, 0));
+        display_text_centerf(LCD_HEIGHT - arrow_height * 3 / 2, "timeout in %d sec",
+            (timeout - current_tick + HZ - 1) / HZ);
+
+        lcd_update();
+
+        /* wait for a key  */
+        int btn = button_get_w_tmo(HZ / 10);
+
+#if defined(HAS_BUTTON_HOLD)
+        /* record action, changing HOLD counts as action */
+        if(btn & BUTTON_MAIN || hold_status != button_hold())
+            last_activity = current_tick;
+
+        hold_status = button_hold();
+#else
+        if(btn & BUTTON_MAIN)
+            last_activity = current_tick;
+#endif
+        /* ignore release, allow repeat */
+        if(btn & BUTTON_REL)
+            continue;
+        if(btn & BUTTON_REPEAT)
+            btn &= ~BUTTON_REPEAT;
+        /* play -> stop loop and return mode */
+        if(btn == BUTTON_ENTER)
+            break;
+        /* left/right/up/down: change mode */
+        if(btn == BUTTON_UP || btn == BUTTON_VOL_UP)
+            mode = (mode + BOOT_COUNT - 1) % BOOT_COUNT;
+        if(btn == BUTTON_DOWN || btn == BUTTON_VOL_DOWN)
+            mode = (mode + 1) % BOOT_COUNT;
+    }
+
+    /* save mode */
+    save_boot_mode(mode);
+    return mode;
+}
+
+void error_screen(const char *msg)
+{
+    lcd_clear_display();
+    lcd_putsf(0, 0, msg);
+    lcd_update();
+}
+
+int choice_screen(const char *title, bool center, int nr_choices, const char *choices[])
+{
+    int choice = 0;
+    int max_len = 0;
+    int h;
+    lcd_getstringsize("x", NULL, &h);
+    for(int i = 0; i < nr_choices; i++)
+    {
+        int len = strlen(choices[i]);
+        if(len > max_len)
+            max_len = len;
+    }
+    char *buf = malloc(max_len + 10);
+    int top_y = 2 * h;
+    int nr_lines = (LCD_HEIGHT - top_y) / h;
+    while(true)
+    {
+        /* make sure choice is visible */
+        int offset = choice - nr_lines / 2;
+        if(offset < 0)
+            offset = 0;
+        lcd_clear_display();
+        /* display top text */
+        lcd_set_foreground(LCD_RGBPACK(255, 201, 0));
+        display_text_center(0, title);
+        int line = 0;
+        for(int i = 0; i < nr_choices && line < nr_lines; i++)
+        {
+            if(i < offset)
+                continue;
+            if(i == choice)
+                lcd_set_foreground(LCD_RGBPACK(255, 0, 0));
+            else
+                lcd_set_foreground(LCD_RGBPACK(255, 201, 0));
+            sprintf(buf, "%s", choices[i]);
+            if(center)
+                display_text_center(top_y + h * line, buf);
+            else
+                lcd_putsxy(0, top_y + h * line, buf);
+            line++;
+        }
+
+        lcd_update();
+
+        /* wait for a key  */
+        int btn = button_get_w_tmo(HZ / 10);
+        /* ignore release, allow repeat */
+        if(btn & BUTTON_REL)
+            continue;
+        if(btn & BUTTON_REPEAT)
+            btn &= ~BUTTON_REPEAT;
+        /* play -> stop loop and return mode */
+        if(btn == BUTTON_ENTER)
+        {
+            free(buf);
+            return btn == BUTTON_ENTER ? choice : -1;
+        }
+        /* left/right/up/down: change mode */
+        if(btn == BUTTON_UP || btn == BUTTON_VOL_UP)
+            choice = (choice + nr_choices - 1) % nr_choices;
+        if(btn == BUTTON_DOWN || btn == BUTTON_VOL_DOWN)
+            choice = (choice + 1) % nr_choices;
+    }
+}
+
+void run_file(const char *name)
+{
+    char *dirname = "/mnt/sd_0/";
+    char *buf = malloc(strlen(dirname) + strlen(name) + 1);
+    sprintf(buf, "%s%s", dirname, name);
+
+    lcd_clear_display();
+    lcd_set_foreground(LCD_RGBPACK(255, 201, 0));
+    lcd_putsf(0, 0, "Running %s", name);
+    lcd_update();
+
+    pid_t pid = fork();
+    if(pid == 0)
+    {
+        execlp("sh", "sh", buf, NULL);
+        _exit(42);
+    }
+    int status;
+    waitpid(pid, &status, 0);
+    if(WIFEXITED(status))
+    {
+        lcd_set_foreground(LCD_RGBPACK(255, 201, 0));
+        lcd_putsf(0, 1, "program returned %d", WEXITSTATUS(status));
+    }
+    else
+    {
+        lcd_set_foreground(LCD_RGBPACK(255, 0, 0));
+        lcd_putsf(0, 1, "an error occured: %x", status);
+    }
+    lcd_set_foreground(LCD_RGBPACK(255, 0, 0));
+    lcd_putsf(0, 3, "Press any key or wait");
+    lcd_update();
+    /* wait a small time */
+    sleep(HZ);
+    /* ignore event */
+    while(button_get(false) != 0) {}
+    /* wait for any key or timeout */
+    button_get_w_tmo(4 * HZ);
+}
+
+void run_script_menu(void)
+{
+    const char **entries = NULL;
+    int nr_entries = 0;
+    DIR *dir = opendir("/mnt/sd_0");
+    struct dirent *ent;
+    while((ent = readdir(dir)))
+    {
+        if(ent->d_type != DT_REG)
+            continue;
+        entries = realloc(entries, (nr_entries + 1) * sizeof(const char *));
+        entries[nr_entries++] = strdup(ent->d_name);
+    }
+    closedir(dir);
+    int idx = choice_screen("RUN SCRIPT", false, nr_entries, entries);
+    if(idx >= 0)
+        run_file(entries[idx]);
+    for(int i = 0; i < nr_entries; i++)
+        free((char *)entries[i]);
+    free(entries);
+}
+
+static void adb(int start)
+{
+    pid_t pid = fork();
+    if(pid == 0)
+    {
+        execlp("/etc/init.d/K90adb", "K90adb", start ? "start" : "stop", NULL);
+        _exit(42);
+    }
+    int status;
+    waitpid(pid, &status, 0);
+#if 0
+    if(WIFEXITED(status))
+    {
+        lcd_set_foreground(LCD_RGBPACK(255, 201, 0));
+        lcd_putsf(0, 1, "program returned %d", WEXITSTATUS(status));
+    }
+    else
+    {
+        lcd_set_foreground(LCD_RGBPACK(255, 0, 0));
+        lcd_putsf(0, 1, "an error occured: %x", status);
+    }
+#endif
+}
+
+static void tools_screen(void)
+{
+    const char *choices[] = {"ADB start", "ADB stop", "Run script", "Restart", "Shutdown"};
+    int choice = choice_screen("TOOLS MENU", true, 5, choices);
+    if(choice == 0)
+    {
+        /* run service menu */
+        printf("Starting ADB service...\n");
+        fflush(stdout);
+        adb(1);
+    }
+    else if(choice == 1)
+    {
+        printf("Stopping ADB service...\n");
+        fflush(stdout);
+        adb(0);
+    }
+    else if(choice == 2)
+    {
+        run_script_menu();
+    }
+    else if(choice == 3)
+        system_reboot();
+    else if(choice == 4)
+        power_off();
+}
+
+#if 0
+/* open log file */
+static int open_log(void)
+{
+    /* open regular log file */
+    int fd = open("/mnt/sd_0/rockbox.log", O_RDWR | O_CREAT | O_APPEND);
+    /* get its size */
+    struct stat stat;
+    if(fstat(fd, &stat) != 0)
+        return fd; /* on error, don't do anything */
+    /* if file is too large, rename it and start a new log file */
+    if(stat.st_size < 1000000)
+        return fd;
+    close(fd);
+    /* move file */
+    rename("/mnt/sd_0/rockbox.log", "/mnt/sd_0/rockbox.log.1");
+    /* re-open the file, truncate in case the move was unsuccessful */
+    return open("/mnt/sd_0/rockbox.log", O_RDWR | O_CREAT | O_APPEND | O_TRUNC);
+}
+#endif
+
+int main(int argc, char **argv)
+{
+    (void) argc;
+    (void) argv;
+#if 0
+    /* redirect stdout and stderr to have error messages logged somewhere on the
+     * user partition */
+    int fd = open_log();
+    if(fd >= 0)
+    {
+        dup2(fd, fileno(stdout));
+        dup2(fd, fileno(stderr));
+        close(fd);
+    }
+    /* print version */
+    printf("Rockbox boot loader\n");
+    printf("Version: %s\n", rbversion);
+    printf("%s\n", MODEL_NAME);
+#endif
+
+    system_init();
+    core_allocator_init();
+    kernel_init();
+    paths_init();
+    lcd_init();
+    font_init();
+    button_init();
+    backlight_init();
+    backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
+
+    /* try to load the extra font we install on the device */
+    //int font_id = font_load("/usr/rockbox/fonts/20-Terminus-Bold.fnt");
+    //if(font_id >= 0)
+    //    lcd_setfont(font_id);
+
+    /* run all tools menu */
+    while(true)
+    {
+        enum boot_mode mode = get_boot_mode();
+        if(mode == BOOT_USB || mode == BOOT_OF)
+        {
+#if 0
+            fflush(stdout);
+            fflush(stderr);
+            close(fileno(stdout));
+            close(fileno(stderr));
+#endif
+            /* for now the only way we have to trigger USB mode it to run the OF */
+            /* boot OF */
+            execvp("/usr/bin/hiby_player", argv);
+            error_screen("Cannot boot OF");
+            sleep(5 * HZ);
+        }
+        else if(mode == BOOT_TOOLS)
+        {
+            tools_screen();
+        }
+        else if(mode == BOOT_ROCKBOX)
+        {
+            fflush(stdout);
+#if defined(XDUOO_X3II)
+            system("/bin/cp /mnt/sd_0/.rockbox/rockbox.x3ii /tmp");
+            execl("/tmp/rockbox.x3ii", "rockbox.x3ii", NULL);
+#elif defined(XDUOO_X20)
+            system("/bin/cp /mnt/sd_0/.rockbox/rockbox.x20 /tmp");
+            execl("/tmp/rockbox.x20", "rockbox.x20", NULL);
+#endif
+            printf("execvp failed: %s\n", strerror(errno));
+            /* fallback to OF in case of failure */
+            error_screen("Cannot boot Rockbox");
+            sleep(5 * HZ);
+        }
+        else
+        {
+            printf("suspend\n");
+//            nwz_power_suspend();
+        }
+    }
+    /* if we reach this point, everything failed, so return an error so that
+     * sysmgrd knows something is wrong */
+    return 1;
+}