diff -urNad /tmp/avrdude-5.10/avrdude.conf.in avrdude-5.10/avrdude.conf.in
--- /tmp/avrdude-5.10/avrdude.conf.in	2010-08-06 13:53:20.883965102 +0200
+++ avrdude-5.10/avrdude.conf.in	2010-08-06 13:11:12.803965267 +0200
@@ -833,6 +833,16 @@
   miso  = 8;
 ;
 
+programmer
+  id    = "gpio";
+  desc  = "Use gpio_dev to bitbang GPIO lines";
+  type  = gpio;
+  reset = 6;
+  sck   = 3;
+  mosi  = 2;
+  miso  = 1;  
+;
+
 # Same as above, different name
 # reset=!txd sck=rts mosi=dtr miso=cts
 
diff -urNad /tmp/avrdude-5.10/config_gram.y avrdude-5.10/config_gram.y
--- /tmp/avrdude-5.10/config_gram.y	2010-08-06 13:53:20.891969681 +0200
+++ avrdude-5.10/config_gram.y	2010-08-06 13:11:12.827964827 +0200
@@ -39,6 +39,7 @@
 #include "stk500.h"
 #include "arduino.h"
 #include "buspirate.h"
+#include "gpio.h"
 #include "stk500v2.h"
 #include "stk500generic.h"
 #include "avr910.h"
@@ -99,6 +100,7 @@
 %token K_DRAGON_JTAG
 %token K_DRAGON_PDI
 %token K_DRAGON_PP
+%token K_GPIO
 %token K_STK500_DEVCODE
 %token K_AVR910_DEVCODE
 %token K_EEPROM
@@ -437,6 +439,12 @@
       buspirate_initpgm(current_prog);
     }
   } |
+  
+  K_TYPE TKN_EQUAL K_GPIO {
+    {
+      gpio_initpgm(current_prog);
+    }
+  } |
 
   K_TYPE TKN_EQUAL K_STK600 {
     {
diff -urNad /tmp/avrdude-5.10/gpio.c avrdude-5.10/gpio.c
--- /tmp/avrdude-5.10/gpio.c	1970-01-01 01:00:00.000000000 +0100
+++ avrdude-5.10/gpio.c	2010-08-06 13:11:12.823989322 +0200
@@ -0,0 +1,181 @@
+/*
+ * avrdude - A Downloader/Uploader for AVR device programmers
+ * Support for a bitbanged GPIO programmer using gpio_dev
+ * 
+ * copyright (c) 2010 flukso.net
+ *
+ * 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.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "ac_cfg.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "avrdude.h"
+#include "avr.h"
+#include "pindefs.h"
+#include "pgm.h"
+#include "bitbang.h"
+
+#include <linux/gpio_dev.h>
+#include <sys/ioctl.h>
+
+#define AVRDUDE_GPIO_DIR_IN	0
+#define AVRDUDE_GPIO_DIR_OUT	1
+
+static int gpio_fd;
+ 
+static void _gpio_dir(int pin, int dir)
+{
+	pin &= PIN_MASK;
+
+	if (dir == AVRDUDE_GPIO_DIR_OUT)
+		ioctl(gpio_fd, GPIO_DIR_OUT, pin);
+	else
+		ioctl(gpio_fd, GPIO_DIR_IN, pin);
+ 
+	return;
+}
+ 
+static int gpio_setpin(PROGRAMMER * pgm, int pin, int value)
+{
+	if (pin & PIN_INVERSE) {
+		value  = !value;
+		pin   &= PIN_MASK;
+	}
+
+	if (value)
+		ioctl(gpio_fd, GPIO_SET, pin);
+	else
+		ioctl(gpio_fd, GPIO_CLEAR, pin);
+
+	if (pgm->ispdelay > 1)
+		bitbang_delay(pgm->ispdelay);
+
+	return 0;
+}
+
+static int gpio_getpin(PROGRAMMER * pgm, int pin)
+{
+	char input, inv = 0;
+
+	if (pin & PIN_INVERSE) {
+		inv = 1;
+		pin   &= PIN_MASK;
+	}
+
+	input = ioctl(gpio_fd, GPIO_GET, pin);
+
+	if (inv) {
+		return input ^ 1;
+	}
+	else {
+		return input;
+	}
+}
+
+static int gpio_highpulsepin(PROGRAMMER * pgm, int pin)
+{
+  gpio_setpin(pgm, pin, 1);
+  gpio_setpin(pgm, pin, 0);
+
+  return 0;
+}
+
+
+
+static void gpio_display(PROGRAMMER *pgm, const char *p)
+{
+	/* nothing */
+}
+
+static void gpio_enable(PROGRAMMER *pgm)
+{
+	/* nothing */
+}
+
+static void gpio_disable(PROGRAMMER *pgm)
+{
+	/* nothing */
+}
+
+static void gpio_powerup(PROGRAMMER *pgm)
+{
+	/* nothing */
+}
+
+static void gpio_powerdown(PROGRAMMER *pgm)
+{
+	/* nothing */
+}
+
+static int gpio_open(PROGRAMMER *pgm, char *port)
+{
+	int i;
+
+	bitbang_check_prerequisites(pgm);
+
+	if ((gpio_fd = open("/dev/gpio", O_RDWR)) < 0) {
+		perror("cannot open /dev/gpio");
+		return -1;
+	}
+	
+	for (i = 0; i < N_PINS; i++) {
+		if (i == PIN_AVR_MISO)
+			_gpio_dir(pgm->pinno[i], AVRDUDE_GPIO_DIR_IN);
+		else
+			_gpio_dir(pgm->pinno[i], AVRDUDE_GPIO_DIR_OUT);
+	}
+
+	return(0);
+}
+
+static void gpio_close(PROGRAMMER *pgm)
+{
+	gpio_setpin(pgm, pgm->pinno[PIN_AVR_RESET], 1);
+	close(gpio_fd);
+	return;
+}
+
+void gpio_initpgm(PROGRAMMER *pgm)
+{
+	strcpy(pgm->type, "GPIO");
+
+	pgm->rdy_led        = bitbang_rdy_led;
+	pgm->err_led        = bitbang_err_led;
+	pgm->pgm_led        = bitbang_pgm_led;
+	pgm->vfy_led        = bitbang_vfy_led;
+	pgm->initialize     = bitbang_initialize;
+	pgm->display        = gpio_display;
+	pgm->enable         = gpio_enable;
+	pgm->disable        = gpio_disable;
+	pgm->powerup        = gpio_powerup;
+	pgm->powerdown      = gpio_powerdown;
+	pgm->program_enable = bitbang_program_enable;
+	pgm->chip_erase     = bitbang_chip_erase;
+	pgm->cmd            = bitbang_cmd;
+	pgm->open           = gpio_open;
+	pgm->close          = gpio_close;
+	pgm->setpin         = gpio_setpin;
+	pgm->getpin         = gpio_getpin;
+	pgm->highpulsepin   = gpio_highpulsepin;
+	pgm->read_byte      = avr_read_byte_default;
+	pgm->write_byte     = avr_write_byte_default;
+}
diff -urNad /tmp/avrdude-5.10/gpio.h avrdude-5.10/gpio.h
--- /tmp/avrdude-5.10/gpio.h	1970-01-01 01:00:00.000000000 +0100
+++ avrdude-5.10/gpio.h	2010-08-06 13:37:40.479767917 +0200
@@ -0,0 +1,33 @@
+/*
+ * avrdude - A Downloader/Uploader for AVR device programmers
+ * Copyright (C) 2000-2004  Brian S. Dean <b...@bsdhome.com>
+ *
+ * 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.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef gpio_h
+#define gpio_h
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void gpio_initpgm        (PROGRAMMER * pgm);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff -urNad /tmp/avrdude-5.10/lexer.l avrdude-5.10/lexer.l
--- /tmp/avrdude-5.10/lexer.l	2010-08-06 13:53:20.883965102 +0200
+++ avrdude-5.10/lexer.l	2010-08-06 13:11:12.803965267 +0200
@@ -146,6 +146,7 @@
 enablepageprogramming { yylval=NULL; return K_ENABLEPAGEPROGRAMMING; }
 errled           { yylval=NULL; return K_ERRLED; }
 flash            { yylval=NULL; return K_FLASH; }
+gpio             { yylval=NULL; return K_GPIO; }
 has_jtag         { yylval=NULL; return K_HAS_JTAG; }
 has_debugwire    { yylval=NULL; return K_HAS_DW; }
 has_pdi          { yylval=NULL; return K_HAS_PDI; }
diff -urNad /tmp/avrdude-5.10/Makefile.am avrdude-5.10/Makefile.am
--- /tmp/avrdude-5.10/Makefile.am	2010-08-06 13:53:20.891969681 +0200
+++ avrdude-5.10/Makefile.am	2010-08-06 13:11:12.827964827 +0200
@@ -101,6 +101,8 @@
 	fileio.c \
 	fileio.h \
 	freebsd_ppi.h \
+	gpio.c \
+	gpio.h \
 	jtagmkI.c \
 	jtagmkI.h \
 	jtagmkI_private.h \
diff -urNad /tmp/avrdude-5.10/Makefile.in avrdude-5.10/Makefile.in
--- /tmp/avrdude-5.10/Makefile.in	2010-08-06 13:53:20.887965471 +0200
+++ avrdude-5.10/Makefile.in	2010-08-06 13:11:12.811964888 +0200
@@ -1,4 +1,4 @@
-# Makefile.in generated by automake 1.10.1 from Makefile.am.
+# Makefile.in generated by automake 1.10.2 from Makefile.am.
 # @configure_input@
 
 # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
@@ -87,11 +87,11 @@
 	libavrdude_a-buspirate.$(OBJEXT) \
 	libavrdude_a-butterfly.$(OBJEXT) libavrdude_a-config.$(OBJEXT) \
 	libavrdude_a-confwin.$(OBJEXT) libavrdude_a-crc16.$(OBJEXT) \
-	libavrdude_a-fileio.$(OBJEXT) libavrdude_a-jtagmkI.$(OBJEXT) \
-	libavrdude_a-jtagmkII.$(OBJEXT) libavrdude_a-lists.$(OBJEXT) \
-	libavrdude_a-par.$(OBJEXT) libavrdude_a-pgm.$(OBJEXT) \
-	libavrdude_a-ppi.$(OBJEXT) libavrdude_a-ppiwin.$(OBJEXT) \
-	libavrdude_a-safemode.$(OBJEXT) \
+	libavrdude_a-fileio.$(OBJEXT) libavrdude_a-gpio.$(OBJEXT) \
+	libavrdude_a-jtagmkI.$(OBJEXT) libavrdude_a-jtagmkII.$(OBJEXT) \
+	libavrdude_a-lists.$(OBJEXT) libavrdude_a-par.$(OBJEXT) \
+	libavrdude_a-pgm.$(OBJEXT) libavrdude_a-ppi.$(OBJEXT) \
+	libavrdude_a-ppiwin.$(OBJEXT) libavrdude_a-safemode.$(OBJEXT) \
 	libavrdude_a-serbb_posix.$(OBJEXT) \
 	libavrdude_a-serbb_win32.$(OBJEXT) \
 	libavrdude_a-ser_avrdoper.$(OBJEXT) \
@@ -204,6 +204,7 @@
 PACKAGE_NAME = @PACKAGE_NAME@
 PACKAGE_STRING = @PACKAGE_STRING@
 PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
 PACKAGE_VERSION = @PACKAGE_VERSION@
 PATH_SEPARATOR = @PATH_SEPARATOR@
 RANLIB = @RANLIB@
@@ -323,6 +324,8 @@
 	fileio.c \
 	fileio.h \
 	freebsd_ppi.h \
+	gpio.c \
+	gpio.h \
 	jtagmkI.c \
 	jtagmkI.h \
 	jtagmkI_private.h \
@@ -493,6 +496,7 @@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libavrdude_a-confwin.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libavrdude_a-crc16.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libavrdude_a-fileio.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libavrdude_a-gpio.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libavrdude_a-jtagmkI.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libavrdude_a-jtagmkII.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libavrdude_a-lexer.Po@am__quote@
@@ -711,6 +715,20 @@
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
 @am__fastdepCC_FALSE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libavrdude_a_CPPFLAGS) $(CPPFLAGS) $(libavrdude_a_CFLAGS) $(CFLAGS) -c -o libavrdude_a-fileio.obj `if test -f 'fileio.c'; then $(CYGPATH_W) 'fileio.c'; else $(CYGPATH_W) '$(srcdir)/fileio.c'; fi`
 
+libavrdude_a-gpio.o: gpio.c
+@am__fastdepCC_TRUE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libavrdude_a_CPPFLAGS) $(CPPFLAGS) $(libavrdude_a_CFLAGS) $(CFLAGS) -MT libavrdude_a-gpio.o -MD -MP -MF $(DEPDIR)/libavrdude_a-gpio.Tpo -c -o libavrdude_a-gpio.o `test -f 'gpio.c' || echo '$(srcdir)/'`gpio.c
+@am__fastdepCC_TRUE@	mv -f $(DEPDIR)/libavrdude_a-gpio.Tpo $(DEPDIR)/libavrdude_a-gpio.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='gpio.c' object='libavrdude_a-gpio.o' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libavrdude_a_CPPFLAGS) $(CPPFLAGS) $(libavrdude_a_CFLAGS) $(CFLAGS) -c -o libavrdude_a-gpio.o `test -f 'gpio.c' || echo '$(srcdir)/'`gpio.c
+
+libavrdude_a-gpio.obj: gpio.c
+@am__fastdepCC_TRUE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libavrdude_a_CPPFLAGS) $(CPPFLAGS) $(libavrdude_a_CFLAGS) $(CFLAGS) -MT libavrdude_a-gpio.obj -MD -MP -MF $(DEPDIR)/libavrdude_a-gpio.Tpo -c -o libavrdude_a-gpio.obj `if test -f 'gpio.c'; then $(CYGPATH_W) 'gpio.c'; else $(CYGPATH_W) '$(srcdir)/gpio.c'; fi`
+@am__fastdepCC_TRUE@	mv -f $(DEPDIR)/libavrdude_a-gpio.Tpo $(DEPDIR)/libavrdude_a-gpio.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='gpio.c' object='libavrdude_a-gpio.obj' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libavrdude_a_CPPFLAGS) $(CPPFLAGS) $(libavrdude_a_CFLAGS) $(CFLAGS) -c -o libavrdude_a-gpio.obj `if test -f 'gpio.c'; then $(CYGPATH_W) 'gpio.c'; else $(CYGPATH_W) '$(srcdir)/gpio.c'; fi`
+
 libavrdude_a-jtagmkI.o: jtagmkI.c
 @am__fastdepCC_TRUE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libavrdude_a_CPPFLAGS) $(CPPFLAGS) $(libavrdude_a_CFLAGS) $(CFLAGS) -MT libavrdude_a-jtagmkI.o -MD -MP -MF $(DEPDIR)/libavrdude_a-jtagmkI.Tpo -c -o libavrdude_a-jtagmkI.o `test -f 'jtagmkI.c' || echo '$(srcdir)/'`jtagmkI.c
 @am__fastdepCC_TRUE@	mv -f $(DEPDIR)/libavrdude_a-jtagmkI.Tpo $(DEPDIR)/libavrdude_a-jtagmkI.Po
@@ -1035,8 +1053,8 @@
 	  esac; \
 	done; \
 	for i in $$list; do \
-	  if test -f $(srcdir)/$$i; then file=$(srcdir)/$$i; \
-	  else file=$$i; fi; \
+	  if test -f $$i; then file=$$i; \
+	  else file=$(srcdir)/$$i; fi; \
 	  ext=`echo $$i | sed -e 's/^.*\\.//'`; \
 	  case "$$ext" in \
 	    1*) ;; \
@@ -1162,7 +1180,7 @@
 	unique=`for i in $$list; do \
 	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
 	  done | \
-	  $(AWK) '{ files[$$0] = 1; nonemtpy = 1; } \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
 	      END { if (nonempty) { for (i in files) print i; }; }'`; \
 	mkid -fID $$unique
 tags: TAGS
