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