Added ppiwin.c: Windows parallel port driver.

git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@204 81a1dc3b-b13d-400b-aceb-764788c761c2

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
+
+