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 "font.h"
  26 #include "lcd.h"
  27 #include "usb.h"
  28 #include "system.h"
  29 #include "button.h"
  30 #include "common.h"
  31 #include "storage.h"
  32 #include "disk.h"
  33 #include "string.h"
  34 #include "adc.h"
  35
  36 extern int show_logo(void);
  37
  38 static void show_splash(int timeout, const char *msg)
  39 {
  40     reset_screen();
  41     lcd_putsxy( (LCD_WIDTH - (SYSFONT_WIDTH * strlen(msg))) / 2,
  42                 (LCD_HEIGHT - SYSFONT_HEIGHT) / 2, msg);
  43     lcd_update();
  44
  45     sleep(timeout);
  46 }
  47
  48 static void usb_mode(void)
  49 {
  50     int button;
  51
  52     /* Init USB */
  53     usb_init();
  54     usb_start_monitoring();
  55
  56     /* Wait for threads to connect */
  57     show_splash(HZ/2, "Waiting for USB");
  58
  59     while (1)
  60     {
  61         button = button_get_w_tmo(HZ/2);
  62
  63         if (button == SYS_USB_CONNECTED)
  64             break; /* Hit */
  65     }
  66
  67     if (button == SYS_USB_CONNECTED)
  68     {
  69         /* Got the message - wait for disconnect */
  70         show_splash(0, "Bootloader USB mode");
  71
  72         usb_acknowledge(SYS_USB_CONNECTED_ACK);
  73
  74         while (1)
  75         {
  76             button = button_get(true);
  77             if (button == SYS_USB_DISCONNECTED)
  78             {
  79                 usb_acknowledge(SYS_USB_DISCONNECTED_ACK);
  80                 break;
  81             }
  82         }
  83     }
  84
  85     reset_screen();
  86 }
  87
  88 static int boot_of(void)
  89 {
  90     int fd, rc, len, i, checksum = 0;
  91     void (*kernel_entry)(int, void*, void*);
  92
  93     /* TODO: get this from the NAND flash instead of SD */
  94     fd = open("/ccpmp.bin", O_RDONLY);
  95     if(fd < 0)
  96         return EFILE_NOT_FOUND;
  97
  98     lseek(fd, 4, SEEK_SET);
  99     rc = read(fd, (char*)&len, 4); /* CPU is LE */
 100     if(rc < 4)
 101         return EREAD_IMAGE_FAILED;
 102
 103     len += 8;
 104     printf("Reading %d bytes...", len);
 105
 106     lseek(fd, 0, SEEK_SET);
 107     rc = read(fd, (void*)0x80004000, len);
 108     if(rc < len)
 109         return EREAD_IMAGE_FAILED;
 110
 111     close(fd);
 112
 113     for(i=0; i<len; i++)
 114         checksum += ((unsigned char*)0x80004000)[i];
 115
 116     *((unsigned int*)0x80004000) = checksum;
 117
 118     printf("Starting the OF...");
 119
 120     /* OF requires all clocks on */
 121     __cpm_start_all();
 122
 123     disable_interrupt();
 124     __dcache_writeback_all();
 125     __icache_invalidate_all();
 126
 127     for(i=8000; i>0; i--)
 128         asm volatile("nop\n");
 129
 130     kernel_entry = (void*) 0x80004008;
 131     kernel_entry(0, "Jan 10 2008", "15:34:42"); /* Reversed from the SPL */
 132
 133     return 0;
 134 }
 135
 136 int main(void)
 137 {
 138     int rc;
 139 #ifdef HAVE_TOUCHSCREEN
 140     int dummy;
 141 #endif
 142     void (*kernel_entry)(void);
 143
 144     kernel_init();
 145     lcd_init();
 146     font_init();
 147     lcd_setfont(FONT_SYSFIXED);
 148     button_init();
 149     backlight_init();
 150
 151     show_logo();
 152
 153     rc = storage_init();
 154     if(rc)
 155         error(EATA, rc);
 156
 157 #ifdef HAVE_TOUCHSCREEN
 158     rc = button_read_device(&dummy);
 159 #else
 160     rc = button_read_device();
 161 #endif
 162
 163     if(rc)
 164         verbose = true;
 165
 166     if(rc & BUTTON_VOL_UP)
 167         usb_mode();
 168
 169     if(verbose)
 170         reset_screen();
 171     printf(MODEL_NAME" Rockbox Bootloader");
 172     printf("Version "APPSVERSION);
 173
 174     rc = disk_mount_all();
 175     if (rc <= 0)
 176         error(EDISK,rc);
 177
 178     if(button_hold())
 179     {
 180         rc = boot_of();
 181         if(rc < 0)
 182             printf("Error: %s", strerror(rc));
 183     }
 184
 185     printf("Loading firmware");
 186     rc = load_firmware((unsigned char *)CONFIG_SDRAM_START, BOOTFILE, 0x400000);
 187     if(rc < 0)
 188         printf("Error: %s", strerror(rc));
 189
 190     if (rc == EOK)
 191     {
 192         printf("Starting Rockbox...");
 193         adc_close();      /* Disable SADC */
 194
 195         disable_interrupt();
 196         kernel_entry = (void*) CONFIG_SDRAM_START;
 197         kernel_entry();
 198     }
 199
 200     /* Halt */
 201     while (1)
 202         core_idle();
 203
 204     return 0;
 205 }