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