bootloader/gigabeat-s.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006 by Greg White
  11  *
  12  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19 #include "config.h"
  20
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include "inttypes.h"
  24 #include "string.h"
  25 #include "cpu.h"
  26 #include "system.h"
  27 #include "lcd.h"
  28 #include "kernel.h"
  29 #include "thread.h"
  30 #include "ata.h"
  31 #include "dir.h"
  32 #include "fat.h"
  33 #include "disk.h"
  34 #include "font.h"
  35 #include "adc.h"
  36 #include "backlight.h"
  37 #include "backlight-target.h"
  38 #include "button.h"
  39 #include "panic.h"
  40 #include "power.h"
  41 #include "file.h"
  42 #include "common.h"
  43 #include "rbunicode.h"
  44 #include "usb.h"
  45 #include "mmu-imx31.h"
  46 #include "lcd-target.h"
  47 #include "avic-imx31.h"
  48 #include <stdarg.h>
  49
  50 char version[] = APPSVERSION;
  51 char buf[MAX_PATH];
  52 char basedir[] = "/Content/0b00/00/"; /* Where files sent via MTP are stored */
  53 char model[5];
  54 int (*kernel_entry)(void);
  55 extern void reference_system_c(void);
  56
  57 /* Dummy stub that creates C references for C functions only used by
  58    assembly - never called */
  59 void reference_files(void)
  60 {
  61     reference_system_c();
  62 }
  63
  64 void main(void)
  65 {
  66     lcd_clear_display();
  67     printf("Hello world!");
  68     printf("Gigabeat S Rockbox Bootloader v.00000003");
  69     system_init();
  70     kernel_init();
  71     printf("kernel init done");
  72     int rc;
  73
  74     set_interrupt_status(IRQ_FIQ_ENABLED, IRQ_FIQ_STATUS);
  75
  76     rc = ata_init();
  77     if(rc)
  78     {
  79         reset_screen();
  80         error(EATA, rc);
  81     }
  82     printf("ata init done");
  83
  84     disk_init();
  85     printf("disk init done");
  86
  87     rc = disk_mount_all();
  88     if (rc<=0)
  89     {
  90         error(EDISK,rc);
  91     }
  92
  93     /* Look for the first valid firmware file */
  94     struct dirent_uncached* entry;
  95     DIR_UNCACHED* dir;
  96     int fd;
  97     dir = opendir_uncached(basedir);
  98     while ((entry = readdir_uncached(dir)))
  99     {
 100         if (*entry->d_name != '.')
 101         {
 102             snprintf(buf, sizeof(buf), "%s%s", basedir, entry->d_name);
 103             fd = open(buf, O_RDONLY);
 104             if (fd >= 0)
 105             {
 106                 lseek(fd, 4, SEEK_SET);
 107                 rc = read(fd, model, 4);
 108                 close(fd);
 109                 if (rc == 4)
 110                 {
 111                     model[4] = 0;
 112                     if (strcmp(model, "gigs") == 0)
 113                         break;
 114                 }
 115             }
 116         }
 117     }
 118
 119     printf("Firmware file: %s", buf);
 120     printf("Loading firmware");
 121
 122     unsigned char *loadbuffer = (unsigned char *)0x0;
 123     int buffer_size = 31*1024*1024;
 124
 125     rc = load_firmware(loadbuffer, buf, buffer_size);
 126     if(rc < 0)
 127         error((int)buf, rc);
 128
 129     system_prepare_fw_start();
 130
 131     if (rc == EOK)
 132     {
 133         kernel_entry = (void*) loadbuffer;
 134         invalidate_icache();
 135         rc = kernel_entry();
 136     }
 137
 138     while (1);
 139 }
 140