bootloader/ondavx747.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2008 by Maurus Cuelenaere
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include "config.h"
  23 #include "jz4740.h"
  24 #include "backlight.h"
  25 #include "backlight-target.h"
  26 #include "font.h"
  27 #include "lcd.h"
  28 #include "usb.h"
  29 #include "system.h"
  30 #include "button.h"
  31 #include "common.h"
  32 #include "storage.h"
  33 #include "disk.h"
  34 #include "string.h"
  35 #include "adc.h"
  36
  37 extern int show_logo(void);
  38
  39 static void show_splash(int timeout, const char *msg)
  40 {
  41     reset_screen();
  42     lcd_putsxy( (LCD_WIDTH - (SYSFONT_WIDTH * strlen(msg))) / 2,
  43                 (LCD_HEIGHT - SYSFONT_HEIGHT) / 2, msg);
  44     lcd_update();
  45
  46     sleep(timeout);
  47 }
  48
  49 static void usb_mode(void)
  50 {
  51     int button;
  52
  53     /* Init USB */
  54     usb_init();
  55     usb_start_monitoring();
  56
  57     /* Wait for threads to connect */
  58     show_splash(HZ/2, "Waiting for USB");
  59
  60     while (1)
  61     {
  62         button = button_get_w_tmo(HZ/2);
  63
  64         if (button == SYS_USB_CONNECTED)
  65             break; /* Hit */
  66     }
  67
  68     if (button == SYS_USB_CONNECTED)
  69     {
  70         /* Got the message - wait for disconnect */
  71         show_splash(0, "Bootloader USB mode");
  72
  73         usb_acknowledge(SYS_USB_CONNECTED_ACK);
  74
  75         while (1)
  76         {
  77             button = button_get(true);
  78             if (button == SYS_USB_DISCONNECTED)
  79             {
  80                 usb_acknowledge(SYS_USB_DISCONNECTED_ACK);
  81                 break;
  82             }
  83         }
  84     }
  85
  86     reset_screen();
  87 }
  88
  89 static int boot_of(void)
  90 {
  91     int fd, rc, len, i, checksum = 0;
  92     void (*kernel_entry)(int, void*, void*);
  93
  94     /* TODO: get this from the NAND flash instead of SD */
  95     fd = open("/ccpmp.bin", O_RDONLY);
  96     if(fd < 0)
  97         return EFILE_NOT_FOUND;
  98
  99     lseek(fd, 4, SEEK_SET);
 100     rc = read(fd, (char*)&len, 4); /* CPU is LE */
 101     if(rc < 4)
 102         return EREAD_IMAGE_FAILED;
 103
 104     len += 8;
 105     printf("Reading %d bytes...", len);
 106
 107     lseek(fd, 0, SEEK_SET);
 108     rc = read(fd, (void*)0x80004000, len);
 109     if(rc < len)
 110         return EREAD_IMAGE_FAILED;
 111
 112     close(fd);
 113
 114     for(i=0; i<len; i++)
 115         checksum += ((unsigned char*)0x80004000)[i];
 116
 117     *((unsigned int*)0x80004000) = checksum;
 118
 119     printf("Starting the OF...");
 120
 121     /* OF requires all clocks on */
 122     __cpm_start_all();
 123
 124     disable_interrupt();
 125     __dcache_writeback_all();
 126     __icache_invalidate_all();
 127
 128     for(i=8000; i>0; i--)
 129         asm volatile("nop\n");
 130
 131     kernel_entry = (void*) 0x80004008;
 132     kernel_entry(0, "Jan 10 2008", "15:34:42"); /* Reversed from the SPL */
 133
 134     return 0;
 135 }
 136
 137 int main(void)
 138 {
 139     int rc;
 140 #ifdef HAVE_TOUCHSCREEN
 141     int dummy;
 142 #endif
 143     void (*kernel_entry)(void);
 144
 145     kernel_init();
 146     lcd_init();
 147     font_init();
 148     lcd_setfont(FONT_SYSFIXED);
 149     button_init();
 150     backlight_init();
 151
 152     show_logo();
 153
 154     rc = storage_init();
 155     if(rc)
 156         error(EATA, rc);
 157
 158 #ifdef HAVE_TOUCHSCREEN
 159     rc = button_read_device(&dummy);
 160 #else
 161     rc = button_read_device();
 162 #endif
 163
 164     if(rc)
 165         verbose = true;
 166
 167     if(rc & BUTTON_VOL_UP)
 168         usb_mode();
 169
 170     if(verbose)
 171         reset_screen();
 172     printf(MODEL_NAME" Rockbox Bootloader");
 173     printf("Version "APPSVERSION);
 174
 175     rc = disk_mount_all();
 176     if (rc <= 0)
 177         error(EDISK,rc);
 178
 179     if(button_hold())
 180     {
 181         rc = boot_of();
 182         if(rc < 0)
 183             printf("Error: %s", strerror(rc));
 184     }
 185
 186     printf("Loading firmware");
 187     rc = load_firmware((unsigned char *)CONFIG_SDRAM_START, BOOTFILE, 0x400000);
 188     if(rc < 0)
 189         printf("Error: %s", strerror(rc));
 190
 191     if (rc == EOK)
 192     {
 193         printf("Starting Rockbox...");
 194         adc_close();      /* Disable SADC */
 195         _backlight_off(); /* Force backlight off to prevent LCD 'flicker' */
 196
 197         disable_interrupt();
 198         kernel_entry = (void*) CONFIG_SDRAM_START;
 199         kernel_entry();
 200     }
 201
 202     /* Halt */
 203     while (1)
 204         core_idle();
 205
 206     return 0;
 207 }