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 #include "version.h"
  47
  48 /* Show the Rockbox logo - in show_logo.c */
  49 extern int show_logo(void);
  50
  51 /* Address to load main Rockbox image to */
  52 #define LOAD_ADDRESS 0x20000000 /* DRAM_START */
  53
  54 extern int line;
  55
  56 #define MAX_LOAD_SIZE (8*1024*1024) /* Arbitrary, but plenty. */
  57
  58 /* The following function is just test/development code */
  59 void show_debug_screen(void)
  60 {
  61     int button;
  62     int power_count = 0;
  63     int count = 0;
  64     bool do_power_off = false;
  65
  66     lcd_puts_scroll(0,0,"+++ this is a very very long line to test scrolling. ---");
  67     while (!do_power_off) {
  68         line = 1;
  69         button = button_get(false);
  70
  71         /* Power-off if POWER button has been held for a time
  72            This loop is currently running at about 100 iterations/second
  73          */
  74         if (button & POWEROFF_BUTTON) {
  75             power_count++;
  76             if (power_count > 100)
  77                do_power_off = true;
  78         } else {
  79             power_count = 0;
  80         }
  81 #if 0
  82         if (button & BUTTON_SELECT){
  83             _backlight_off();
  84         }
  85         else{
  86             _backlight_on();
  87         }
  88 #endif
  89         printf("Btn: 0x%08x",button);
  90 #if 0
  91         printf("Tick: %d",current_tick);
  92         printf("GPIOA: 0x%08x",GPIOA);
  93         printf("GPIOB: 0x%08x",GPIOB);
  94         printf("GPIOC: 0x%08x",GPIOC);
  95         printf("GPIOD: 0x%08x",GPIOD);
  96         printf("GPIOE: 0x%08x",GPIOE);
  97 #endif
  98
  99 #if 0
 100         int i;
 101         for (i = 0; i<4; i++)
 102         {
 103             printf("ADC%d: 0x%04x",i,adc_read(i));
 104         }
 105 #endif
 106         count++;
 107         printf("Count: %d",count);
 108         lcd_update();
 109         sleep(HZ/10);
 110
 111     }
 112
 113     lcd_clear_display();
 114     line = 0;
 115     printf("POWER-OFF");
 116
 117     /* Power-off */
 118     power_off();
 119
 120     printf("(NOT) POWERED OFF");
 121     while (true);
 122 }
 123
 124 void* main(void)
 125 {
 126 #ifdef TCCBOOT
 127     int rc;
 128     unsigned char* loadbuffer = (unsigned char*)LOAD_ADDRESS;
 129 #endif
 130
 131     system_init();
 132     power_init();
 133
 134     kernel_init();
 135     enable_irq();
 136
 137     lcd_init();
 138
 139     adc_init();
 140     button_init();
 141     backlight_init();
 142
 143     font_init();
 144     lcd_setfont(FONT_SYSFIXED);
 145
 146     show_logo();
 147
 148     _backlight_on();
 149
 150 /* Only load the firmware if TCCBOOT is defined - this ensures SDRAM_START is
 151    available for loading the firmware. Otherwise display the debug screen. */
 152 #ifdef TCCBOOT
 153     printf("Rockbox boot loader");
 154     printf("Version " RBVERSION);
 155
 156     printf("ATA");
 157     rc = storage_init();
 158     if(rc)
 159     {
 160         reset_screen();
 161         error(EATA, rc, true);
 162     }
 163
 164     printf("mount");
 165     rc = disk_mount_all();
 166     if (rc<=0)
 167     {
 168         error(EDISK,rc, true);
 169     }
 170
 171     rc = load_firmware(loadbuffer, BOOTFILE, MAX_LOAD_SIZE);
 172
 173     if (rc < 0)
 174     {
 175         error(EBOOTFILE,rc, true);
 176     }
 177     else if (rc == EOK)
 178     {
 179         int(*kernel_entry)(void) = (void *) loadbuffer;
 180
 181         disable_irq();
 182         rc = kernel_entry();
 183     }
 184
 185     panicf("Boot failed!");
 186 #else
 187     show_debug_screen();
 188 #endif
 189
 190     return 0;
 191 }