bootloader/iaudio_coldfire.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2007 by Linus Nielsen Feltzing
  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 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include "inttypes.h"
  26 #include "string.h"
  27 #include "cpu.h"
  28 #include "system.h"
  29 #include "lcd.h"
  30 #include "lcd-remote.h"
  31 #include "kernel.h"
  32 #include "thread.h"
  33 #include "storage.h"
  34 #include "usb.h"
  35 #include "disk.h"
  36 #include "font.h"
  37 #include "adc.h"
  38 #include "backlight.h"
  39 #include "backlight-target.h"
  40 #include "button.h"
  41 #include "panic.h"
  42 #include "power.h"
  43 #include "powermgmt.h"
  44 #include "file.h"
  45 #include "version.h"
  46
  47
  48 #include "pcf50606.h"
  49 #include "common.h"
  50
  51 #include <stdarg.h>
  52
  53 /* Maximum allowed firmware image size. 10MB is more than enough */
  54 #define MAX_LOADSIZE (10*1024*1024)
  55
  56 #define DRAM_START 0x31000000
  57
  58 int usb_screen(void)
  59 {
  60    return 0;
  61 }
  62
  63 /* Reset the cookie for the crt0 crash check */
  64 inline void __reset_cookie(void)
  65 {
  66     asm(" move.l #0,%d0");
  67     asm(" move.l %d0,0x10017ffc");
  68 }
  69
  70 void start_firmware(void)
  71 {
  72     adc_close();
  73     asm(" move.w #0x2700,%sr");
  74     __reset_cookie();
  75     asm(" move.l %0,%%d0" :: "i"(DRAM_START));
  76     asm(" movec.l %d0,%vbr");
  77     asm(" move.l %0,%%sp" :: "m"(*(int *)DRAM_START));
  78     asm(" move.l %0,%%a0" :: "m"(*(int *)(DRAM_START+4)));
  79     asm(" jmp (%a0)");
  80 }
  81
  82 void shutdown(void)
  83 {
  84     printf("Shutting down...");
  85
  86     /* We need to gracefully spin down the disk to prevent clicks. */
  87     if (ide_powered())
  88     {
  89         /* Make sure ATA has been initialized. */
  90         storage_init();
  91
  92         /* And put the disk into sleep immediately. */
  93         storage_sleepnow();
  94     }
  95
  96     sleep(HZ*2);
  97
  98     /* Backlight OFF */
  99     _backlight_off();
 100 #ifdef HAVE_REMOTE_LCD
 101     _remote_backlight_off();
 102 #endif
 103
 104     __reset_cookie();
 105     power_off();
 106 }
 107
 108 /* Print the battery voltage (and a warning message). */
 109 void check_battery(void)
 110 {
 111     int battery_voltage, batt_int, batt_frac;
 112
 113     battery_voltage = battery_adc_voltage();
 114     batt_int = battery_voltage / 1000;
 115     batt_frac = (battery_voltage % 1000) / 10;
 116
 117     printf("Batt: %d.%02dV", batt_int, batt_frac);
 118
 119     if (battery_voltage <= 3500)
 120     {
 121         printf("WARNING! BATTERY LOW!!");
 122         sleep(HZ*2);
 123     }
 124 }
 125
 126 void main(void)
 127 {
 128     int i;
 129     int rc;
 130     bool rc_on_button = false;
 131     bool on_button = false;
 132
 133     /* We want to read the buttons as early as possible, before the user
 134        releases the ON button */
 135
 136 #ifdef IAUDIO_M3
 137     or_l(0x80000000, &GPIO_FUNCTION);  /* remote Play button */
 138     and_l(~0x80000000, &GPIO_ENABLE);
 139     or_l(0x00000202, &GPIO1_FUNCTION); /* main Hold & Play */
 140
 141     if ((GPIO1_READ & 0x000000002) == 0)
 142         on_button = true;
 143
 144     if ((GPIO_READ & 0x80000000) == 0)
 145         rc_on_button = true;
 146 #elif defined(IAUDIO_M5) || defined(IAUDIO_X5)
 147     int data;
 148
 149     or_l(0x0e000000, &GPIO_FUNCTION); /* main Hold & Power, remote Play */
 150     and_l(~0x0e000000, &GPIO_ENABLE);
 151
 152     data = GPIO_READ;
 153
 154     if ((data & 0x04000000) == 0)
 155         on_button = true;
 156
 157     if ((data & 0x02000000) == 0)
 158         rc_on_button = true;
 159 #endif
 160
 161     power_init();
 162
 163     system_init();
 164     kernel_init();
 165
 166     set_cpu_frequency(CPUFREQ_NORMAL);
 167     coldfire_set_pllcr_audio_bits(DEFAULT_PLLCR_AUDIO_BITS);
 168
 169     enable_irq();
 170     lcd_init();
 171 #ifdef HAVE_REMOTE_LCD
 172     lcd_remote_init();
 173 #endif
 174     backlight_init();
 175     font_init();
 176     adc_init();
 177     button_init();
 178
 179     if ((!on_button || button_hold())
 180         && (!rc_on_button || remote_button_hold())
 181         && !charger_inserted())
 182     {
 183         /* No need to check for USB connection here, as USB is handled
 184          * in the cowon loader. */
 185         if (on_button || rc_on_button)
 186             printf("Hold switch on");
 187         shutdown();
 188     }
 189
 190     printf("Rockbox boot loader");
 191     printf("Version " RBVERSION);
 192
 193     check_battery();
 194
 195     rc = storage_init();
 196     if(rc)
 197     {
 198         printf("ATA error: %d", rc);
 199         sleep(HZ*5);
 200         power_off();
 201     }
 202
 203     disk_init();
 204
 205     rc = disk_mount_all();
 206     if (rc<=0)
 207     {
 208         printf("No partition found");
 209         sleep(HZ*5);
 210         power_off();
 211     }
 212
 213     printf("Loading firmware");
 214     i = load_firmware((unsigned char *)DRAM_START, BOOTFILE, MAX_LOADSIZE);
 215     printf("Result: %s", strerror(i));
 216
 217     if (i < EOK) {
 218         printf("Error!");
 219         printf("Can't load " BOOTFILE ": ");
 220         printf(strerror(rc));
 221         sleep(HZ*3);
 222         power_off();
 223     } else {
 224         start_firmware();
 225     }
 226 }
 227
 228 /* These functions are present in the firmware library, but we reimplement
 229    them here because the originals do a lot more than we want */
 230 void screen_dump(void)
 231 {
 232 }