bootloader/sansa_as3525.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2008 by Rafaël Carré
  11  *
  12  * Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
  13  * and the ipodlinux bootloader by Daniel Palffy and Bernard Leach
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  21  * KIND, either express or implied.
  22  *
  23  ****************************************************************************/
  24
  25 #include <stdio.h>
  26 #include <system.h>
  27 #include <inttypes.h>
  28 #include "config.h"
  29 #include "lcd.h"
  30 #include "backlight.h"
  31 #include "button-target.h"
  32 #include "common.h"
  33 #include "storage.h"
  34 #include "disk.h"
  35 #include "panic.h"
  36 #include "power.h"
  37
  38 int show_logo(void);
  39
  40 void main(void) __attribute__((noreturn));
  41 void main(void)
  42 {
  43     unsigned char* loadbuffer;
  44     int buffer_size;
  45     void(*kernel_entry)(void);
  46     int ret;
  47
  48     system_init();
  49     kernel_init();
  50
  51     enable_irq();
  52
  53     lcd_init();
  54     show_logo();
  55
  56     backlight_init();
  57
  58     button_init_device();
  59     int btn = button_read_device();
  60
  61 #if !defined(SANSA_FUZE) && !defined(SANSA_CLIP) && !defined(SANSA_CLIPV2) \
  62     && !defined(SANSA_CLIPPLUS)
  63     if (button_hold())
  64     {
  65         verbose = true;
  66         lcd_clear_display();
  67         printf("Hold switch on");
  68         printf("Shutting down...");
  69         sleep(HZ);
  70         power_off();
  71     }
  72 #endif
  73
  74     /* Enable bootloader messages if any button is pressed */
  75     if (btn)
  76     {
  77         lcd_clear_display();
  78         verbose = true;
  79     }
  80
  81     ret = storage_init();
  82     if(ret < 0)
  83         error(EATA,ret);
  84
  85     if(!disk_init(IF_MV(0)))
  86         panicf("disk_init failed!");
  87
  88     ret = disk_mount_all();
  89
  90     if(ret <= 0)
  91         error(EDISK, ret);
  92
  93     printf("Loading firmware");
  94
  95     loadbuffer = (unsigned char*)DRAM_ORIG; /* DRAM */
  96     buffer_size = (int)(loadbuffer + (DRAM_SIZE) - TTB_SIZE);
  97
  98     ret = load_firmware(loadbuffer, BOOTFILE, buffer_size);
  99     if(ret < 0)
 100         error(EBOOTFILE, ret);
 101
 102     disable_irq(); /* disable irq until we have copied the new vectors */
 103
 104     if (ret == EOK)
 105     {
 106         kernel_entry = (void*) loadbuffer;
 107         printf("Executing");
 108         kernel_entry();
 109         printf("ERR: Failed to boot");
 110     }
 111
 112     /* never returns */
 113     while(1) ;
 114 }