bootloader/imx233.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2011 by amaury Pouly
  11  *
  12  * Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
  13  * and the ipodlinux bootloader by Daniel Palffy and Bernard Leach
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  21  * KIND, either express or implied.
  22  *
  23  ****************************************************************************/
  24
  25 #include <stdio.h>
  26 #include <system.h>
  27 #include <inttypes.h>
  28 #include "config.h"
  29 #include "gcc_extensions.h"
  30 #include "lcd.h"
  31 #include "backlight.h"
  32 #include "button-target.h"
  33 #include "common.h"
  34 #include "storage.h"
  35 #include "disk.h"
  36 #include "panic.h"
  37 #include "power.h"
  38 #include "system-target.h"
  39 #include "fmradio_i2c.h"
  40
  41 #include "usb.h"
  42 #include "usb-target.h"
  43
  44 #include "clkctrl-imx233.h"
  45
  46 #ifdef HAVE_BOOTLOADER_USB_MODE
  47 static void usb_mode(int connect_timeout)
  48 {
  49     int button;
  50
  51     usb_init();
  52     usb_start_monitoring();
  53
  54     /* Wait for threads to connect or cable is pulled */
  55     printf("USB: Connecting");
  56
  57     long end_tick = current_tick + connect_timeout;
  58
  59     while(1)
  60     {
  61         button = button_get_w_tmo(HZ/10);
  62
  63         if(button == SYS_USB_CONNECTED)
  64             break; /* Hit */
  65
  66         if(TIME_AFTER(current_tick, end_tick))
  67         {
  68             /* Timed out waiting for the connect - will happen when connected
  69              * to a charger through the USB port */
  70             printf("USB: Timed out");
  71             break;
  72         }
  73
  74         if(!usb_plugged())
  75             break; /* Cable pulled */
  76     }
  77
  78     if(button == SYS_USB_CONNECTED)
  79     {
  80         /* Got the message - wait for disconnect */
  81         printf("Bootloader USB mode");
  82
  83         usb_acknowledge(SYS_USB_CONNECTED_ACK);
  84
  85         while(1)
  86         {
  87             button = button_get_w_tmo(HZ/2);
  88             if(button == SYS_USB_DISCONNECTED)
  89                 break;
  90         }
  91     }
  92
  93     /* Put drivers initialized for USB connection into a known state */
  94     usb_close();
  95 }
  96 #else /* !HAVE_BOOTLOADER_USB_MODE */
  97 static void usb_mode(int connect_timeout)
  98 {
  99     (void) connect_timeout;
 100 }
 101 #endif /* HAVE_BOOTLOADER_USB_MODE */
 102
 103 void main(uint32_t arg) NORETURN_ATTR;
 104 void main(uint32_t arg)
 105 {
 106     unsigned char* loadbuffer;
 107     int buffer_size;
 108     void(*kernel_entry)(void);
 109     int ret;
 110
 111     system_init();
 112     kernel_init();
 113
 114     power_init();
 115     enable_irq();
 116
 117     lcd_init();
 118     lcd_clear_display();
 119     lcd_update();
 120
 121     backlight_init();
 122
 123     button_init();
 124
 125     //button_debug_screen();
 126     printf("arg=%x", arg);
 127
 128 #ifdef SANSA_FUZEPLUS
 129     extern void imx233_mmc_disable_window(void);
 130     if(arg == 0xfee1dead)
 131     {
 132         printf("Disable MMC window.");
 133         imx233_mmc_disable_window();
 134     }
 135 #endif
 136
 137     ret = storage_init();
 138     if(ret < 0)
 139         error(EATA, ret, true);
 140
 141     /* NOTE: allow disk_init and disk_mount_all to fail since we can do USB after.
 142      * We need this order to determine the correct logical sector size */
 143     while(!disk_init(IF_MV(0)))
 144         printf("disk_init failed!");
 145
 146     if((ret = disk_mount_all()) <= 0)
 147         error(EDISK, ret, false);
 148
 149     if(usb_plugged())
 150         usb_mode(HZ);
 151
 152     printf("Loading firmware");
 153
 154     loadbuffer = (unsigned char*)DRAM_ORIG; /* DRAM */
 155     buffer_size = (int)(loadbuffer + DRAM_SIZE - TTB_SIZE);
 156
 157     while((ret = load_firmware(loadbuffer, BOOTFILE, buffer_size)) < 0)
 158     {
 159         error(EBOOTFILE, ret, true);
 160     }
 161
 162     kernel_entry = (void*) loadbuffer;
 163     cpucache_invalidate();
 164     printf("Executing");
 165     kernel_entry();
 166     printf("ERR: Failed to boot");
 167
 168     /* never returns */
 169     while(1) ;
 170 }