X-Git-Url: https://git.friedersdorff.com/?a=blobdiff_plain;f=common%2Fbootloader.c;h=cda295b1811e92f90baea342084b37a07139bcc1;hb=48662ace8b6d8aca5ab4a5de0a0a40781a95478a;hp=5cbfc72e5b9bce076ca5ed91523247934a6eb3aa;hpb=f4125707399d11a7d80587659c464b9bcddb8c56;p=max%2Ftmk_keyboard.git

diff --git a/common/bootloader.c b/common/bootloader.c
index 5cbfc72e..cda295b1 100644
--- a/common/bootloader.c
+++ b/common/bootloader.c
@@ -1,22 +1,148 @@
-/*
-Copyright 2011 Jun Wako <wakojun@gmail.com>
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <avr/wdt.h>
+#include <util/delay.h>
+#include "bootloader.h"
 
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 2 of the License, or
-(at your option) any later version.
+#ifdef PROTOCOL_LUFA
+#include <LUFA/Drivers/USB/USB.h>
+#endif
 
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
 
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
+/* Boot Section Size in *BYTEs*
+ *   Teensy   halfKay    512
+ *   Teensy++ halfKay    1024
+ *   Atmel DFU loader    4096
+ *   LUFA bootloader     4096
+ *   USBaspLoader        2048
+ */
+#ifndef BOOTLOADER_SIZE
+#warning To use bootloader_jump() you need to define BOOTLOADER_SIZE in config.h.
+#define BOOTLOADER_SIZE     4096
+#endif
 
-#include "bootloader.h"
+#define FLASH_SIZE          (FLASHEND + 1L)
+#define BOOTLOADER_START    (FLASH_SIZE - BOOTLOADER_SIZE)
+
+
+/* 
+ * Entering the Bootloader via Software 
+ * http://www.fourwalledcubicle.com/files/LUFA/Doc/120730/html/_page__software_bootloader_start.html
+ */
+#define BOOTLOADER_RESET_KEY 0xB007B007
+uint32_t reset_key  __attribute__ ((section (".noinit")));
+
+/* initialize MCU status by watchdog reset */
+void bootloader_jump(void) {
+#ifdef PROTOCOL_LUFA
+    USB_Disable();
+    cli();
+    _delay_ms(2000);
+#endif
+
+#ifdef PROTOCOL_PJRC
+    cli();
+    UDCON = 1;
+    USBCON = (1<<FRZCLK);
+    UCSR1B = 0;
+    _delay_ms(5);
+#endif
+
+    // watchdog reset
+    reset_key = BOOTLOADER_RESET_KEY;
+    wdt_enable(WDTO_250MS);
+    for (;;);
+}
+
+
+/* this runs before main() */
+void bootloader_jump_after_watchdog_reset(void) __attribute__ ((used, naked, section (".init3")));
+void bootloader_jump_after_watchdog_reset(void)
+{
+    if ((MCUSR & (1<<WDRF)) && reset_key == BOOTLOADER_RESET_KEY) {
+        reset_key = 0;
+
+        // My custom USBasploader requires this to come up.
+        MCUSR = 0;
+
+        // Seems like Teensy halfkay loader requires clearing WDRF and disabling watchdog.
+        MCUSR &= ~(1<<WDRF);
+        wdt_disable();
+
+        // This is compled into 'icall', address should be in word unit, not byte.
+        ((void (*)(void))(BOOTLOADER_START/2))();
+    }
+}
+
+
+#if 0
+/* Jumping To The Bootloader
+ * http://www.pjrc.com/teensy/jump_to_bootloader.html
+ * 
+ * This method doen't work when using LUFA. idk why.
+ * - needs to initialize more regisers or interrupt setting?
+ */
+void bootloader_jump(void) {
+#ifdef PROTOCOL_LUFA
+    USB_Disable();
+    cli();
+    _delay_ms(2000);
+#endif
+
+#ifdef PROTOCOL_PJRC
+    cli();
+    UDCON = 1;
+    USBCON = (1<<FRZCLK);
+    UCSR1B = 0;
+    _delay_ms(5);
+#endif
+
+    /*
+     * Initialize
+     */
+#if defined(__AVR_AT90USB162__)
+    EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0;
+    TIMSK0 = 0; TIMSK1 = 0; UCSR1B = 0;
+    DDRB = 0; DDRC = 0; DDRD = 0;
+    PORTB = 0; PORTC = 0; PORTD = 0;
+#elif defined(__AVR_ATmega32U4__)
+    EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
+    TIMSK0 = 0; TIMSK1 = 0; TIMSK3 = 0; TIMSK4 = 0; UCSR1B = 0; TWCR = 0;
+    DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; TWCR = 0;
+    PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
+#elif defined(__AVR_AT90USB646__)
+    EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
+    TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
+    DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
+    PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
+#elif defined(__AVR_AT90USB1286__)
+    EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
+    TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
+    DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
+    PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
+#endif
+
+    /*
+     * USBaspLoader
+     */
+#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega168P__) || defined(__AVR_ATmega328P__)
+    // This makes custom USBasploader come up.
+    MCUSR = 0;
+
+    // initialize ports
+    PORTB = 0; PORTC= 0; PORTD = 0;
+    DDRB = 0; DDRC= 0; DDRD = 0;
 
+    // disable interrupts
+    EIMSK = 0; EECR = 0; SPCR = 0;
+    ACSR = 0; SPMCSR = 0; WDTCSR = 0; PCICR = 0;
+    TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0;
+    ADCSRA = 0; TWCR = 0; UCSR0B = 0;
+#endif
 
-void bootloader_jump(void) __attribute__ ((weak));
-void bootloader_jump(void) {}
+    // This is compled into 'icall', address should be in word unit, not byte.
+    ((void (*)(void))(BOOTLOADER_START/2))();
+}
+#endif