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 #ifdef USE_ROCKBOX_USB
  31 #include "usb.h"
  32 #include "usb_core.h"
  33 #include "sysfont.h"
  34 #endif /* USE_ROCKBOX_USB */
  35 #include "backlight.h"
  36 #include "button-target.h"
  37 #include "common.h"
  38 #include "storage.h"
  39 #include "disk.h"
  40 #include "panic.h"
  41 #include "power.h"
  42
  43 int show_logo(void);
  44
  45 void main(void) __attribute__((noreturn));
  46 void main(void)
  47 {
  48     unsigned char* loadbuffer;
  49     int buffer_size;
  50     void(*kernel_entry)(void);
  51     int ret;
  52
  53     system_init();
  54     kernel_init();
  55
  56     enable_irq();
  57
  58     lcd_init();
  59     show_logo();
  60
  61     backlight_init();
  62
  63     button_init_device();
  64     int btn = button_read_device();
  65
  66 #if !defined(SANSA_FUZE) && !defined(SANSA_CLIP) && !defined(SANSA_CLIPV2) \
  67     && !defined(SANSA_CLIPPLUS)
  68     if (button_hold())
  69     {
  70         verbose = true;
  71         lcd_clear_display();
  72         printf("Hold switch on");
  73         printf("Shutting down...");
  74         sleep(HZ);
  75         power_off();
  76     }
  77 #endif
  78
  79     /* Enable bootloader messages if any button is pressed */
  80     if (btn)
  81     {
  82         lcd_clear_display();
  83         verbose = true;
  84     }
  85
  86     ret = storage_init();
  87     if(ret < 0)
  88         error(EATA,ret);
  89
  90 #ifdef USE_ROCKBOX_USB
  91     usb_init();
  92     if(usb_detect() == USB_INSERTED)
  93     {
  94         const char msg[] = "Bootloader USB mode";
  95         reset_screen();
  96         lcd_putsxy( (LCD_WIDTH - (SYSFONT_WIDTH * sizeof(msg))) / 2,
  97                     (LCD_HEIGHT - SYSFONT_HEIGHT) / 2, msg);
  98         lcd_update();
  99
 100         usb_core_enable_driver(USB_DRIVER_MASS_STORAGE, true);
 101         usb_enable(true);
 102
 103         while(usb_detect() == USB_INSERTED)
 104             sleep(HZ);
 105
 106         usb_enable(false);
 107
 108         reset_screen();
 109         lcd_update();
 110     }
 111 #endif /* USE_ROCKBOX_USB */
 112
 113     if(!disk_init(IF_MV(0)))
 114         panicf("disk_init failed!");
 115
 116     ret = disk_mount_all();
 117
 118     if(ret <= 0)
 119         error(EDISK, ret);
 120
 121     printf("Loading firmware");
 122
 123     loadbuffer = (unsigned char*)DRAM_ORIG; /* DRAM */
 124     buffer_size = (int)(loadbuffer + (DRAM_SIZE) - TTB_SIZE);
 125
 126     ret = load_firmware(loadbuffer, BOOTFILE, buffer_size);
 127     if(ret < 0)
 128         error(EBOOTFILE, ret);
 129
 130     disable_irq(); /* disable irq until we have copied the new vectors */
 131
 132     if (ret == EOK)
 133     {
 134         kernel_entry = (void*) loadbuffer;
 135         printf("Executing");
 136         kernel_entry();
 137         printf("ERR: Failed to boot");
 138     }
 139
 140     /* never returns */
 141     while(1) ;
 142 }