From 252dcf01138ba3d98d5eb1cafd357fbe0953bb81 Mon Sep 17 00:00:00 2001
From: Eric Weddington <arcanum>
Date: Thu, 20 Feb 2003 18:15:50 +0000
Subject: [PATCH] Added ppiwin.c: Windows parallel port driver.
git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk@204 81a1dc3b-b13d-400b-aceb-764788c761c2
---
avrdude/ppiwin.c | 319 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 319 insertions(+)
create mode 100644 avrdude/ppiwin.c
diff --git a/avrdude/ppiwin.c b/avrdude/ppiwin.c
new file mode 100644
index 00000000..8bfc9b7a
--- /dev/null
+++ b/avrdude/ppiwin.c
@@ -0,0 +1,319 @@
+/*
+ * avrdude - A Downloader/Uploader for AVR device programmers
+ * Copyright (C) 2003 Eric B. Weddington <eric@umginc.net> or <eric@ecentral.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
+ */
+
+
+/*
+This is the parallel port interface for Windows built using Cygwin.
+
+In the ppi_* functions that access the parallel port registers,
+fd = parallel port address
+reg = register as defined in an enum in ppi.h. This must be converted
+ to a proper offset of the base address.
+*/
+
+
+
+
+#if defined(__CYGWIN__)
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <windows.h>
+#include "ppi.h"
+
+
+
+extern char *progname;
+
+
+
+#define DEVICE_LPT1 "lpt1"
+#define DEVICE_LPT2 "lpt2"
+#define DEVICE_LPT1ALT "lpt1alt"
+
+#define DEVICE_MAX 3
+
+typedef struct
+{
+ const char *name;
+ int base_address;
+} winpp;
+
+static const winpp winports[DEVICE_MAX] =
+{
+ {DEVICE_LPT1, 0x378},
+ {DEVICE_LPT2, 0x278},
+ {DEVICE_LPT1ALT, 0x3BC},
+
+};
+
+
+
+
+
+/* FUNCTION PROTOTYPES */
+static int winnt_pp_open(void);
+static unsigned short port_get(int fd, int reg);
+static unsigned char reg2offset(int reg);
+static unsigned char inb(unsigned short port);
+static void outb(unsigned char value, unsigned short port);
+
+
+
+/* FUNCTION DEFINITIONS */
+
+int ppi_open(char *port)
+{
+ unsigned char i;
+ int fd;
+
+ fd = winnt_pp_open();
+
+ if(fd < 0)
+ {
+ fprintf(stderr, "%s: can't open device \"giveio\"\n\n", progname);
+ return(-1);
+ }
+
+ /* Search the windows port names for a match */
+ fd = -1;
+ for(i = 0; i < DEVICE_MAX; i++)
+ {
+ if(strcmp(winports[i].name, port) == 0)
+ {
+ /* Set the file descriptor with the Windows parallel port base address. */
+ fd = winports[i].base_address;
+ break;
+ }
+ }
+ if(fd < 0)
+ {
+ fprintf(stderr, "%s: can't open device \"%s\"\n\n", progname, port);
+ return(-1);
+ }
+
+ return(fd);
+}
+
+
+#define DRIVERNAME "\\\\.\\giveio"
+static int winnt_pp_open(void)
+{
+ // Only try to use giveio under Windows NT/2000/XP.
+ OSVERSIONINFO ver_info;
+
+ memset(&ver_info, 0, sizeof(ver_info));
+
+ ver_info.dwOSVersionInfoSize = sizeof(ver_info);
+
+ if(!GetVersionEx(&ver_info))
+ {
+ return(-1);
+ }
+ else if(ver_info.dwPlatformId == VER_PLATFORM_WIN32_NT)
+ {
+ HANDLE h = CreateFile(DRIVERNAME,
+ GENERIC_READ,
+ 0,
+ NULL,
+ OPEN_EXISTING,
+ FILE_ATTRIBUTE_NORMAL,
+ NULL);
+
+ if(h == INVALID_HANDLE_VALUE)
+ {
+ return(-1);
+ }
+
+ /* Close immediately. The process now has the rights it needs. */
+ if(h != NULL)
+ {
+ CloseHandle(h);
+ }
+ }
+ return(0);
+}
+
+
+
+
+void ppi_close(int fd)
+{
+ return;
+}
+
+
+
+/*
+ * set the indicated bit of the specified register.
+ */
+int ppi_set(int fd, int reg, int bit)
+{
+ unsigned char v;
+ unsigned short port;
+
+ port = port_get(fd, reg);
+ v = inb(port);
+ v |= bit;
+ outb(v, port);
+ return 0;
+}
+
+
+/*
+ * clear the indicated bit of the specified register.
+ */
+int ppi_clr(int fd, int reg, int bit)
+{
+ unsigned char v;
+ unsigned short port;
+
+ port = port_get(fd, reg);
+ v = inb(port);
+ v &= ~bit;
+ outb(v, port);
+
+ return 0;
+}
+
+
+/*
+ * get the indicated bit of the specified register.
+ */
+int ppi_get(int fd, int reg, int bit)
+{
+ unsigned char v;
+
+ v = inb(port_get(fd, reg));
+ v &= bit;
+
+ return(v);
+}
+
+
+
+
+/*
+ * toggle the indicated bit of the specified register.
+ */
+int ppi_toggle(int fd, int reg, int bit)
+{
+ unsigned char v;
+ unsigned short port;
+
+ port = port_get(fd, reg);
+
+ v = inb(port);
+ v ^= bit;
+ outb(v, port);
+
+ return 0;
+}
+
+
+/*
+ * get all bits of the specified register.
+ */
+int ppi_getall(int fd, int reg)
+{
+ unsigned char v;
+
+ v = inb(port_get(fd, reg));
+
+ return((int)v);
+}
+
+
+
+
+/*
+ * set all bits of the specified register to val.
+ */
+int ppi_setall(int fd, int reg, int val)
+{
+ outb((unsigned char)val, port_get(fd, reg));
+ return 0;
+}
+
+
+
+
+/* Calculate port address to access. */
+static unsigned short port_get(int fd, int reg)
+{
+ return((unsigned short)(fd + reg2offset(reg)));
+}
+
+
+/* Convert register enum to offset of base address. */
+static unsigned char reg2offset(int reg)
+{
+ unsigned char offset = 0;
+
+ switch(reg)
+ {
+ case PPIDATA:
+ {
+ offset = 0;
+ break;
+ }
+ case PPISTATUS:
+ {
+ offset = 1;
+ break;
+ }
+ case PPICTRL:
+ {
+ offset = 2;
+ break;
+ }
+ }
+
+ return(offset);
+}
+
+
+/* Read in value from port. */
+static unsigned char inb(unsigned short port)
+{
+ unsigned char t;
+ asm volatile ("in %1, %0"
+ : "=a" (t)
+ : "d" (port));
+ return t;
+}
+
+
+/* Write value to port. */
+static void outb(unsigned char value, unsigned short port)
+{
+ asm volatile ("out %1, %0"
+ :
+ : "d" (port), "a" (value) );
+}
+
+
+
+#endif
+
+