bootloader/telechips.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2007 by Dave Chapman
  11  *
  12  * Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License
  16  * as published by the Free Software Foundation; either version 2
  17  * of the License, or (at your option) any later version.
  18  *
  19  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  20  * KIND, either express or implied.
  21  *
  22  ****************************************************************************/
  23 #include "config.h"
  24
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include "cpu.h"
  29 #include "system.h"
  30 #include "lcd.h"
  31 #include "kernel.h"
  32 #include "thread.h"
  33 #include "storage.h"
  34 #include "fat.h"
  35 #include "disk.h"
  36 #include "font.h"
  37 #include "button.h"
  38 #include "adc.h"
  39 #include "adc-target.h"
  40 #include "backlight.h"
  41 #include "backlight-target.h"
  42 #include "panic.h"
  43 #include "power.h"
  44 #include "file.h"
  45 #include "common.h"
  46
  47 /* Show the Rockbox logo - in show_logo.c */
  48 extern int show_logo(void);
  49
  50 /* Address to load main Rockbox image to */
  51 #define LOAD_ADDRESS 0x20000000 /* DRAM_START */
  52
  53 char version[] = APPSVERSION;
  54
  55 extern int line;
  56
  57 #define MAX_LOAD_SIZE (8*1024*1024) /* Arbitrary, but plenty. */
  58
  59 /* The following function is just test/development code */
  60 void show_debug_screen(void)
  61 {
  62     int button;
  63     int power_count = 0;
  64     int count = 0;
  65     bool do_power_off = false;
  66
  67     lcd_puts_scroll(0,0,"+++ this is a very very long line to test scrolling. ---");
  68     while (!do_power_off) {
  69         line = 1;
  70         button = button_get(false);
  71
  72         /* Power-off if POWER button has been held for a time
  73            This loop is currently running at about 100 iterations/second
  74          */
  75         if (button & POWEROFF_BUTTON) {
  76             power_count++;
  77             if (power_count > 100)
  78                do_power_off = true;
  79         } else {
  80             power_count = 0;
  81         }
  82 #if 0
  83         if (button & BUTTON_SELECT){
  84             _backlight_off();
  85         }
  86         else{
  87             _backlight_on();
  88         }
  89 #endif
  90         printf("Btn: 0x%08x",button);
  91 #if 0
  92         printf("Tick: %d",current_tick);
  93         printf("GPIOA: 0x%08x",GPIOA);
  94         printf("GPIOB: 0x%08x",GPIOB);
  95         printf("GPIOC: 0x%08x",GPIOC);
  96         printf("GPIOD: 0x%08x",GPIOD);
  97         printf("GPIOE: 0x%08x",GPIOE);
  98 #endif
  99
 100 #if 0
 101         int i;
 102         for (i = 0; i<4; i++)
 103         {
 104             printf("ADC%d: 0x%04x",i,adc_read(i));
 105         }
 106 #endif
 107         count++;
 108         printf("Count: %d",count);
 109         lcd_update();
 110         sleep(HZ/10);
 111
 112     }
 113
 114     lcd_clear_display();
 115     line = 0;
 116     printf("POWER-OFF");
 117
 118     /* Power-off */
 119     power_off();
 120
 121     printf("(NOT) POWERED OFF");
 122     while (true);
 123 }
 124
 125 void* main(void)
 126 {
 127 #ifdef TCCBOOT
 128     int rc;
 129     unsigned char* loadbuffer = (unsigned char*)LOAD_ADDRESS;
 130 #endif
 131
 132     system_init();
 133     power_init();
 134
 135     kernel_init();
 136     enable_irq();
 137
 138     lcd_init();
 139
 140     adc_init();
 141     button_init();
 142     backlight_init();
 143
 144     font_init();
 145     lcd_setfont(FONT_SYSFIXED);
 146
 147     show_logo();
 148
 149     _backlight_on();
 150
 151 /* Only load the firmware if TCCBOOT is defined - this ensures SDRAM_START is
 152    available for loading the firmware. Otherwise display the debug screen. */
 153 #ifdef TCCBOOT
 154     printf("Rockbox boot loader");
 155     printf("Version %s", version);
 156
 157     printf("ATA");
 158     rc = storage_init();
 159     if(rc)
 160     {
 161         reset_screen();
 162         error(EATA, rc);
 163     }
 164
 165     printf("mount");
 166     rc = disk_mount_all();
 167     if (rc<=0)
 168     {
 169         error(EDISK,rc);
 170     }
 171
 172     rc = load_firmware(loadbuffer, BOOTFILE, MAX_LOAD_SIZE);
 173
 174     if (rc < 0)
 175     {
 176         error(EBOOTFILE,rc);
 177     }
 178     else if (rc == EOK)
 179     {
 180         int(*kernel_entry)(void) = (void *) loadbuffer;
 181
 182         disable_irq();
 183         rc = kernel_entry();
 184     }
 185
 186     panicf("Boot failed!");
 187 #else
 188     show_debug_screen();
 189 #endif
 190
 191     return 0;
 192 }