rockbox/bootloader/x1000/main.c

/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2021 Aidan MacDonald
 *
 * 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 "x1000bootloader.h"
#include "system.h"
#include "core_alloc.h"
#include "kernel/kernel-internal.h"
#include "power.h"
#include "button.h"
#include "storage.h"
#include "disk.h"
#include "file_internal.h"
#include "usb.h"
#include "i2c-x1000.h"
#include "boot-x1000.h"
#include <stdbool.h>

static int read_btn(void)
{
#ifdef HAVE_BUTTON_DATA
    int bdata;
    return button_read_device(&bdata);
#else
    return button_read_device();
#endif
}

void main(uint32_t saved_cpm_scratch)
{
    (void)saved_cpm_scratch;

    system_init();
    core_allocator_init();
    kernel_init();
    i2c_init();
    power_init();
    button_init();
#ifdef HAVE_TOUCHSCREEN
    touchscreen_set_mode(TOUCHSCREEN_BUTTON);
#endif
    enable_irq();

    if(storage_init() < 0) {
        splashf(5*HZ, "storage_init() failed");
        power_off();
    }

    filesystem_init();

    usb_init();
    usb_start_monitoring();

    /* It's OK if this doesn't mount anything. Any disk access should
     * be guarded by a call to check_disk() to see if the disk is really
     * present, blocking with an "insert SD card" prompt if appropriate. */
    disk_mount_all();

#ifdef SHANLING_Q1
    /* This is needed for OF updates. The OF extracts the update package
     * to the SD card and reboots to the recovery kernel to complete the
     * update. */
    if ((saved_cpm_scratch & 0xffff) == 0x1a1a) {
        cpm_scratch_set(saved_cpm_scratch & 0xffff0000);
        boot_of_recovery();
    }
#endif

    /* If USB booting, the user probably needs to enter recovery mode;
     * let's not force them to hold down the recovery key. */
    bool recovery_mode = get_boot_flag(BOOT_FLAG_USB_BOOT);

    /* Normal boot - if it fails, we bail to the recovery menu */
    if(!recovery_mode) {
        int btn = read_btn();
        btn &= ~BUTTON_POWER; /* ignore power button */

        if(btn == BL_RECOVERY)
            recovery_mode = true;
#if defined(OF_PLAYER_BTN)
        else if(btn == OF_PLAYER_BTN)
            boot_of_player();
#endif
#if defined(OF_RECOVERY_BTN)
        else if(btn == OF_RECOVERY_BTN)
            boot_of_recovery();
#endif
        else
            boot_rockbox();
    }

    /* This function does not return. */
    recovery_menu();
}