bootloader/imx233.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2011 by amaury Pouly
  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 #include "backlight.h"
  32 #include "button-target.h"
  33 #include "common.h"
  34 #include "storage.h"
  35 #include "disk.h"
  36 #include "panic.h"
  37 #include "power.h"
  38 #include "system-target.h"
  39 #include "fmradio_i2c.h"
  40
  41 #include "usb.h"
  42
  43 void main(uint32_t arg) NORETURN_ATTR;
  44 void main(uint32_t arg)
  45 {
  46     unsigned char* loadbuffer;
  47     int buffer_size;
  48     void(*kernel_entry)(void);
  49     int ret;
  50
  51     system_init();
  52     kernel_init();
  53
  54     enable_irq();
  55
  56     lcd_init();
  57     lcd_clear_display();
  58     lcd_update();
  59
  60     backlight_init();
  61
  62     button_init_device();
  63
  64     //button_debug_screen();
  65     printf("arg=%c%c%c%c", arg >> 24,
  66         (arg >> 16) & 0xff, (arg >> 8) & 0xff, (arg & 0xff));
  67
  68     ret = storage_init();
  69     if(ret < 0)
  70         error(EATA, ret, true);
  71
  72     #ifdef HAVE_BOOTLOADER_USB_MODE
  73     usb_init();
  74     usb_core_enable_driver(USB_DRIVER_SERIAL, true);
  75     usb_attach();
  76     while(!(button_read_device() & BUTTON_POWER))
  77         yield();
  78     power_off();
  79     #endif /* HAVE_BOOTLOADER_USB_MODE */
  80
  81     while(!disk_init(IF_MV(0)))
  82         panicf("disk_init failed!");
  83
  84     while((ret = disk_mount_all()) <= 0)
  85     {
  86         error(EDISK, ret, true);
  87     }
  88
  89     if(button_read_device() & BUTTON_VOL_UP)
  90         printf("Booting from SD card required.");
  91
  92     printf("Loading firmware");
  93
  94     loadbuffer = (unsigned char*)DRAM_ORIG; /* DRAM */
  95     buffer_size = (int)(loadbuffer + DRAM_SIZE - TTB_SIZE);
  96
  97     while((ret = load_firmware(loadbuffer, BOOTFILE, buffer_size)) < 0)
  98     {
  99         error(EBOOTFILE, ret, true);
 100     }
 101
 102     kernel_entry = (void*) loadbuffer;
 103     //cpucache_invalidate();
 104     printf("Executing");
 105     kernel_entry();
 106     printf("ERR: Failed to boot");
 107
 108     /* never returns */
 109     while(1) ;
 110 }