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