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 "gcc_extensions.h"
  30 #include "lcd.h"
  31 #ifdef USE_ROCKBOX_USB
  32 #include "usb.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 void show_logo(void);
  44
  45 #ifdef USE_ROCKBOX_USB
  46 static void usb_mode(void)
  47 {
  48     if(usb_detect() != USB_INSERTED)
  49     {
  50         static const char msg[] = "Plug USB cable";
  51         reset_screen();
  52         lcd_putsxy( (LCD_WIDTH - (SYSFONT_WIDTH * sizeof(msg))) / 2,
  53                     (LCD_HEIGHT - SYSFONT_HEIGHT) / 2, msg);
  54         lcd_update();
  55
  56         /* wait until USB is plugged */
  57         while(usb_detect() != USB_INSERTED) ;
  58     }
  59
  60     static const char msg[] = "Bootloader USB mode";
  61     reset_screen();
  62     lcd_putsxy( (LCD_WIDTH - (SYSFONT_WIDTH * sizeof(msg))) / 2,
  63                 (LCD_HEIGHT - SYSFONT_HEIGHT) / 2, msg);
  64     lcd_update();
  65
  66     while(usb_detect() == USB_INSERTED)
  67         sleep(HZ);
  68
  69     reset_screen();
  70     lcd_update();
  71 }
  72 #endif /* USE_ROCKBOX_USB */
  73
  74 void main(void) NORETURN_ATTR;
  75 void main(void)
  76 {
  77     unsigned char* loadbuffer;
  78     int buffer_size;
  79     void(*kernel_entry)(void);
  80     int ret;
  81
  82     system_init();
  83     kernel_init();
  84
  85     enable_irq();
  86
  87     lcd_init();
  88     show_logo();
  89
  90     backlight_init();
  91
  92     button_init_device();
  93     int btn = button_read_device();
  94
  95 #if !defined(SANSA_FUZE) && !defined(SANSA_CLIP) && !defined(SANSA_CLIPV2) \
  96     && !defined(SANSA_CLIPPLUS) && !defined(SANSA_CLIPZIP)
  97     if (button_hold())
  98     {
  99         verbose = true;
 100         lcd_clear_display();
 101         printf("Hold switch on");
 102         printf("Shutting down...");
 103         sleep(HZ);
 104         power_off();
 105     }
 106 #endif
 107
 108     /* Enable bootloader messages if any button is pressed */
 109     if (btn)
 110     {
 111         lcd_clear_display();
 112         verbose = true;
 113     }
 114
 115     ret = storage_init();
 116     if(ret < 0)
 117         error(EATA, ret, true);
 118
 119 #ifdef USE_ROCKBOX_USB
 120     usb_init();
 121     usb_start_monitoring();
 122
 123     /* Enter USB mode if USB is plugged and SELECT button is pressed */
 124     if(btn & BUTTON_SELECT && usb_detect() == USB_INSERTED)
 125         usb_mode();
 126 #endif /* USE_ROCKBOX_USB */
 127
 128     while(!disk_init(IF_MV(0)))
 129 #ifdef USE_ROCKBOX_USB
 130         usb_mode();
 131 #else
 132         panicf("disk_init failed!");
 133 #endif
 134
 135     while((ret = disk_mount_all()) <= 0)
 136     {
 137 #ifdef USE_ROCKBOX_USB
 138         error(EDISK, ret, false);
 139         usb_mode();
 140 #else
 141         error(EDISK, ret, true);
 142 #endif
 143     }
 144
 145     printf("Loading firmware");
 146
 147     loadbuffer = (unsigned char*)DRAM_ORIG; /* DRAM */
 148     buffer_size = (int)(loadbuffer + (DRAM_SIZE) - TTB_SIZE);
 149
 150     while((ret = load_firmware(loadbuffer, BOOTFILE, buffer_size)) < 0)
 151     {
 152 #ifdef USE_ROCKBOX_USB
 153         error(EBOOTFILE, ret, false);
 154         usb_mode();
 155 #else
 156         error(EBOOTFILE, ret, true);
 157 #endif
 158     }
 159
 160     kernel_entry = (void*) loadbuffer;
 161     commit_discard_idcache();
 162     printf("Executing");
 163     kernel_entry();
 164     printf("ERR: Failed to boot");
 165
 166     /* never returns */
 167     while(1) ;
 168 }