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  * All files in this archive are subject to the GNU General Public License.
  15  * See the file COPYING in the source tree root for full license agreement.
  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 <string.h>
  26 #include "cpu.h"
  27 #include "system.h"
  28 #include "lcd.h"
  29 #include "kernel.h"
  30 #include "thread.h"
  31 #include "ata.h"
  32 #include "fat.h"
  33 #include "disk.h"
  34 #include "font.h"
  35 #include "button.h"
  36 #include "adc.h"
  37 #include "adc-target.h"
  38 #include "backlight.h"
  39 #include "backlight-target.h"
  40 #include "panic.h"
  41 #include "power.h"
  42 #include "file.h"
  43 #include "common.h"
  44
  45 #if defined(COWON_D2)
  46 #include "i2c.h"
  47 #define LOAD_ADDRESS 0x20000000 /* DRAM_START */
  48 #endif
  49
  50 char version[] = APPSVERSION;
  51
  52 extern int line;
  53
  54 #define MAX_LOAD_SIZE (8*1024*1024) /* Arbitrary, but plenty. */
  55
  56 void show_debug_screen(void)
  57 {
  58     int button;
  59     int power_count = 0;
  60     int count = 0;
  61     bool do_power_off = false;
  62
  63     while(!do_power_off) {
  64         line = 0;
  65         printf("Hello World!");
  66
  67         button = button_read_device();
  68
  69         /* Power-off if POWER button has been held for a long time
  70            This loop is currently running at about 100 iterations/second
  71          */
  72         if (button & POWEROFF_BUTTON) {
  73             power_count++;
  74             if (power_count > 200)
  75                do_power_off = true;
  76         } else {
  77             power_count = 0;
  78         }
  79
  80         printf("Btn: 0x%08x",button);
  81
  82 #if defined(COWON_D2)
  83         int i;
  84
  85         printf("GPIOA: 0x%08x",GPIOA);
  86         printf("GPIOB: 0x%08x",GPIOB);
  87         printf("GPIOC: 0x%08x",GPIOC);
  88         printf("GPIOD: 0x%08x",GPIOD);
  89         printf("GPIOE: 0x%08x",GPIOE);
  90
  91         for (i = 0; i<4; i++)
  92         {
  93             printf("ADC%d: 0x%04x",i,adc_read(i));
  94         }
  95
  96         /* TODO: Move this stuff out to a touchscreen driver and establish
  97            how such a beast is going to work. Since it needs I2C read/write,
  98            it can't easily go on an interrupt-based tick task. */
  99         {
 100             unsigned char buf[] = { 0x2f, (0xE<<1) | 1, /* ADC start for X+Y */
 101                                     0, 0, 0 };
 102             int x,y;
 103             i2c_write(0x10, buf, 2);
 104             i2c_readmem(0x10, 0x2e, buf, 5);
 105             x = (buf[2] << 2) | (buf[3] & 3);
 106             y = (buf[4] << 2) | ((buf[3] & 0xC) >> 2);
 107             printf("X: 0x%03x Y: 0x%03x",x,y);
 108
 109             x = (x*LCD_WIDTH) / 1024;
 110             y = (y*LCD_HEIGHT) / 1024;
 111             lcd_hline(x-5, x+5, y);
 112             lcd_vline(x, y-5, y+5);
 113
 114             buf[0] = 0x2f;
 115             buf[1] = (0xF<<1) | 1;   /* ADC start for P1+P2 */
 116             i2c_write(0x10, buf, 2);
 117             i2c_readmem(0x10, 0x2e, buf, 5);
 118             x = (buf[2] << 2) | (buf[3] & 3);
 119             y = (buf[4] << 2) | ((buf[3] & 0xC) >> 2);
 120             printf("P1: 0x%03x P2: 0x%03x",x,y);
 121         }
 122 #endif
 123
 124         count++;
 125         printf("Count: %d",count);
 126     }
 127
 128     lcd_clear_display();
 129     line = 0;
 130     printf("POWER-OFF");
 131
 132     /* Power-off */
 133     power_off();
 134
 135     printf("(NOT) POWERED OFF");
 136     while (true);
 137 }
 138
 139
 140 void* main(void)
 141 {
 142 #if defined(COWON_D2) && defined(TCCBOOT)
 143     int rc;
 144     unsigned char* loadbuffer = (unsigned char*)LOAD_ADDRESS;
 145 #endif
 146
 147     power_init();
 148     system_init();
 149     lcd_init();
 150
 151     adc_init();
 152     button_init();
 153     backlight_init();
 154
 155     font_init();
 156     lcd_setfont(FONT_SYSFIXED);
 157
 158     _backlight_on();
 159
 160 /* Only load the firmware if TCCBOOT is defined - this ensures SDRAM_START is
 161    available for loading the firmware. Otherwise display the debug screen. */
 162 #if defined(COWON_D2) && defined(TCCBOOT)
 163     printf("Rockbox boot loader");
 164     printf("Version %s", version);
 165
 166     printf("ATA");
 167     rc = ata_init();
 168     if(rc)
 169     {
 170         reset_screen();
 171         error(EATA, rc);
 172     }
 173
 174     printf("mount");
 175     rc = disk_mount_all();
 176     if (rc<=0)
 177     {
 178         error(EDISK,rc);
 179     }
 180
 181     rc = load_firmware(loadbuffer, BOOTFILE, MAX_LOAD_SIZE);
 182
 183     if (rc < 0)
 184     {
 185         error(EBOOTFILE,rc);
 186     }
 187     else if (rc == EOK)
 188     {
 189         int(*kernel_entry)(void);
 190
 191         /* wait for button release to allow debug statememts to be read */
 192         while (button_read_device()) {};
 193
 194         kernel_entry = (void*) loadbuffer;
 195
 196         /* allow entry to the debug screen if hold is on */
 197         if (!button_hold()) rc = kernel_entry();
 198     }
 199 #endif
 200     show_debug_screen();
 201
 202     return 0;
 203 }
 204
 205 /* These functions are present in the firmware library, but we reimplement
 206    them here because the originals do a lot more than we want */
 207 void usb_acknowledge(void)
 208 {
 209 }
 210
 211 void usb_wait_for_disconnect(void)
 212 {
 213 }