this is an import of Sujal M. Petal's pnpinfo.. it includes modifications

by Luigi Rizzo and myself...

4 files changed, 747 insertions, 0 deletions

diff --git a/contrib/pnpinfo/Makefile b/contrib/pnpinfo/Makefile
new file mode 100644
index 0000000..450c4c2
--- /dev/null
+++ b/contrib/pnpinfo/Makefile
@@ -0,0 +1,7 @@
+#	@(#)Makefile	8.1 (Berkeley) 6/5/93
+
+PROG=	pnpinfo
+MAN8=	pnpinfo.8
+CFLAGS= -Wall
+
+.include <bsd.prog.mk>
diff --git a/contrib/pnpinfo/pnpinfo.8 b/contrib/pnpinfo/pnpinfo.8
new file mode 100644
index 0000000..a966df8
--- /dev/null
+++ b/contrib/pnpinfo/pnpinfo.8
@@ -0,0 +1,59 @@
+.\" Copyright (c) 1996, Sujal M. Patel
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"      This product includes software developed by Sujal M. Patel
+.\" 4. Neither the name of the author nor the names of any co-contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"      $Id: pnpinfo.8,v 1.4 1996/05/06 00:00:18 smpatel Exp smpatel $
+.\"
+.Dd January 7, 1996
+.Dt PNPINFO 8
+.Os
+.Sh NAME
+.Nm pnpinfo
+.Nd "Reports information about Plug-n-Play ISA devices"
+.Sh SYNOPSIS
+.Nm pnpinfo
+.Sh DESCRIPTION
+.Nm pnpinfo
+reports information about Plug-n-Play ISA devices.  Some of the information,
+such as the vendor ID, serial number, I/O ports, IRQ, etc. are useful when
+configuring a kernel with ISA PnP devices.
+.Sh BUGS
+A few of the tags are unimplemented (Enough exist for 99% of PnP cards).
+.Sh SEE ALSO
+.Xr pnp 4
+.Sh HISTORY
+The
+.Nm
+utility first appeared in
+.Tn FreeBSD
+2.2.
+.Sh AUTHOR
+.Bl -tag
+Sujal M. Patel, smpatel@umiacs.umd.edu
+.El
diff --git a/contrib/pnpinfo/pnpinfo.c b/contrib/pnpinfo/pnpinfo.c
new file mode 100644
index 0000000..6a804fd
--- /dev/null
+++ b/contrib/pnpinfo/pnpinfo.c
@@ -0,0 +1,607 @@
+/*
+ * Copyright (c) 1996, Sujal M. Patel
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *      $Id: pnpinfo.c,v 1.16 1996/05/05 23:56:38 smpatel Exp $
+ */
+
+#include <sys/time.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+
+#include <machine/cpufunc.h>
+
+#include <i386/isa/pnp.h>
+
+#ifdef DEBUG
+#define	DEB(x) x
+#else
+#define DEB(x)
+#endif
+#define DDB(x) x
+
+void
+pnp_write(int d, u_char r)
+{
+    outb (_PNP_ADDRESS, d);
+    outb (_PNP_WRITE_DATA, r);
+}
+/* The READ_DATA port that we are using currently */
+static int rd_port;
+
+u_char
+pnp_read(int d)
+{
+    outb(_PNP_ADDRESS, d);
+    return inb( (rd_port << 2) + 3) & 0xff;
+}
+
+u_char
+pnp_readw(int d)
+{
+    int c = pnp_read(d) << 8 ;
+    c |= pnp_read(d+1);
+    return c;
+}
+
+int logdevs=0;
+
+void DELAY __P((int i));
+void send_Initiation_LFSR();
+int get_serial __P((u_char *data));
+int get_resource_info __P((u_char *buffer, int len));
+int handle_small_res __P((u_char *resinfo, int item, int len));
+void handle_large_res __P((u_char *resinfo, int item, int len));
+void dump_resdata __P((u_char *data, int csn));
+int isolation_protocol();
+
+
+/*
+ * DELAY does accurate delaying in user-space.
+ * This function busy-waits.
+ */
+void
+DELAY (int i)
+{
+    struct timeval t;
+    long start, stop;
+
+    i *= 4;
+
+    gettimeofday (&t, NULL);
+    start = t.tv_sec * 1000000 + t.tv_usec;
+    do {
+	gettimeofday (&t, NULL);
+	stop = t.tv_sec * 1000000 + t.tv_usec;
+    } while (start + i > stop);
+}
+
+
+/*
+ * Send Initiation LFSR as described in "Plug and Play ISA Specification,
+ * Intel May 94."
+ */
+void
+send_Initiation_LFSR()
+{
+    int cur, i;
+
+    pnp_write(CONFIG_CONTROL, 0x2);
+
+    /* Reset the LSFR */
+    outb(_PNP_ADDRESS, 0);
+    outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */
+
+    cur = 0x6a;
+
+    for (i = 0; i < 32; i++) {
+	outb(_PNP_ADDRESS, cur);
+	cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff);
+    }
+}
+
+/*
+ * Get the device's serial number.  Returns 1 if the serial is valid.
+ */
+int
+get_serial(u_char *data)
+{
+    int i, bit, valid = 0, sum = 0x6a;
+
+    bzero(data, sizeof(char) * 9);
+
+    for (i = 0; i < 72; i++) {
+	bit = inb((rd_port << 2) | 0x3) == 0x55;
+	DELAY(250);	/* Delay 250 usec */
+
+	/* Can't Short Circuit the next evaluation, so 'and' is last */
+	bit = (inb((rd_port << 2) | 0x3) == 0xaa) && bit;
+	DELAY(250);	/* Delay 250 usec */
+
+	valid = valid || bit;
+
+	if (i < 64)
+	    sum = (sum >> 1) |
+		(((sum ^ (sum >> 1) ^ bit) << 7) & 0xff);
+
+	data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0);
+    }
+
+    valid = valid && (data[8] == sum);
+
+    return valid;
+}
+
+
+/*
+ * Fill's the buffer with resource info from the device.
+ * Returns 0 if the device fails to report
+ */
+int
+get_resource_info(u_char *buffer, int len)
+{
+    int i, j;
+
+    for (i = 0; i < len; i++) {
+	outb(_PNP_ADDRESS, STATUS);
+	for (j = 0; j < 100; j++) {
+	    if ((inb((rd_port << 2) | 0x3)) & 0x1)
+		break;
+	    DELAY(1);
+	}
+	if (j == 100) {
+	    printf("PnP device failed to report resource data\n");
+	    return 0;
+	}
+	outb(_PNP_ADDRESS, RESOURCE_DATA);
+	buffer[i] = inb((rd_port << 2) | 0x3);
+	DEB(printf("--- get_resource_info: got 0x%02x\n",(unsigned)buffer[i]));
+    }
+    return 1;
+}
+
+void
+report_dma_info (x)
+	int x;
+{
+    char *s1=NULL, *s2=NULL, *s3=NULL, *s4=NULL, *s5=NULL;
+
+    switch (x & 0x3) {
+    case 0:
+	s1="8-bit";
+	break;
+    case 1:
+	s1="8/16-bit";
+	break;
+    case 2:
+	s1="16-bit";
+	break;
+#ifdef DIAGNOSTIC
+    case 3:
+	s1="Reserved";
+	break;
+#endif
+    }
+
+    s2 = (x & 0x4) ? "bus master" : "not a bus master";
+
+    s3 = (x & 0x8) ? "count by byte" : "";
+
+    s4 = (x & 0x10) ? "count by word" : "";
+
+    switch ((x & 0x60) >> 5) {
+    case 0:
+	s5="Compatibility mode";
+	break;
+    case 1:
+	s5="Type A";
+	break;
+    case 2:
+	s5="Type B";
+	break;
+    case 3:
+	s5="Type F";
+	break;
+    }
+    printf("\t%s, %s, %s, %s, %s\n",s1,s2,s3,s4,s5);
+}
+
+
+void
+report_memory_info (int x)
+{
+    if (x & 0x1)
+	printf ("Memory Range: Writeable\n");
+    else
+	printf ("Memory Range: Not writeable (ROM)\n");
+
+    if (x & 0x2)
+	printf ("Memory Range: Read-cacheable, write-through\n");
+    else
+	printf ("Memory Range: Non-cacheable\n");
+
+    if (x & 0x4)
+	printf ("Memory Range: Decode supports high address\n");
+    else
+	printf ("Memory Range: Decode supports range length\n");
+
+    switch ((x & 0x18) >> 3) {
+    case 0:
+	printf ("Memory Range: 8-bit memory only\n");
+	break;
+    case 1:
+	printf ("Memory Range: 16-bit memory only\n");
+	break;
+    case 2:
+	printf ("Memory Range: 8-bit and 16-bit memory supported\n");
+	break;
+#ifdef DIAGNOSTIC
+    case 3:
+	printf ("Memory Range: Reserved\n");
+	break;
+#endif
+    }
+
+    if (x & 0x20)
+	printf ("Memory Range: Memory is shadowable\n");
+    else
+	printf ("Memory Range: Memory is not shadowable\n");
+
+    if (x & 0x40)
+	printf ("Memory Range: Memory is an expansion ROM\n");
+    else
+	printf ("Memory Range: Memory is not an expansion ROM\n");
+
+#ifdef DIAGNOSTIC
+    if (x & 0x80)
+	printf ("Memory Range: Reserved (Device is brain-damaged)\n");
+#endif
+}
+
+
+/*
+ *  Small Resource Tag Handler
+ *
+ *  Returns 1 if checksum was valid (and an END_TAG was received).
+ *  Returns -1 if checksum was invalid (and an END_TAG was received).
+ *  Returns 0 for other tags.
+ */
+int
+handle_small_res(u_char *resinfo, int item, int len)
+{
+    int i;
+
+    DEB(printf("*** ITEM 0x%04x len %d detected\n", item, len));
+
+    switch (item) {
+    default:
+	printf("*** ITEM 0x%02x detected\n", item);
+	break;
+    case PNP_VERSION:
+	printf("PnP Version %d.%d, Vendor Version %d\n",
+	    resinfo[0] >> 4, resinfo[0] & (0xf), resinfo[1]);
+	break;
+    case LOG_DEVICE_ID:
+	printf("\nLogical Device ID: %c%c%c%02x%02x 0x%08x #%d\n",
+		((resinfo[0] & 0x7c) >> 2) + 64,
+		(((resinfo[0] & 0x03) << 3) |
+		((resinfo[1] & 0xe0) >> 5)) + 64,
+		(resinfo[1] & 0x1f) + 64,
+		resinfo[2], resinfo[3], *(int *)(resinfo),
+		logdevs++);
+
+	if (resinfo[4] & 0x1)
+	    printf ("\tDevice powers up active\n"); /* XXX */
+	if (resinfo[4] & 0x2)
+	    printf ("\tDevice supports I/O Range Check\n");
+	if (resinfo[4] > 0x3)
+	    printf ("\tReserved register funcs %02x\n",
+		resinfo[4]);
+
+	if (len == 6)
+	    printf("\tVendor register funcs %02x\n", resinfo[5]);
+	break;
+    case COMP_DEVICE_ID:
+	printf("Compatible Device ID: %c%c%c%02x%02x (%08x)\n",
+		((resinfo[0] & 0x7c) >> 2) + 64,
+		(((resinfo[0] & 0x03) << 3) |
+		((resinfo[1] & 0xe0) >> 5)) + 64,
+		(resinfo[1] & 0x1f) + 64,
+		resinfo[2], resinfo[3], *(int *)resinfo);
+	break;
+    case IRQ_FORMAT:
+	printf("    IRQ: ");
+
+	for (i = 0; i < 8; i++)
+	    if (resinfo[0] & (1<<i))
+		printf("%d ", i);
+	for (i = 0; i < 8; i++)
+	    if (resinfo[1] & (1<<i))
+		printf("%d ", i + 8);
+	if (len == 3) {
+	    if (resinfo[2] & 0x1)
+		printf("IRQ: High true edge sensitive\n");
+	    if (resinfo[2] & 0x2)
+		printf("IRQ: Low true edge sensitive\n");
+	    if (resinfo[2] & 0x4)
+		printf("IRQ: High true level sensitive\n");
+	    if (resinfo[2] & 0x8)
+		printf("IRQ: Low true level sensitive\n");
+	} else {
+	    printf(" - only one type (true/edge)\n");
+	}
+	break;
+    case DMA_FORMAT:
+	printf("    DMA: channel(s) ");
+	for (i = 0; i < 8; i++)
+	    if (resinfo[0] & (1<<i))
+		printf("%d ", i);
+	printf ("\n");
+	report_dma_info (resinfo[1]);
+	break;
+    case START_DEPEND_FUNC:
+	printf("TAG Start DF\n");
+	if (len == 1) {
+	    switch (resinfo[0]) {
+	    case 0:
+		printf("Good Configuration\n");
+		break;
+	    case 1:
+		printf("Acceptable Configuration\n");
+		break;
+	    case 2:
+		printf("Sub-optimal Configuration\n");
+		break;
+	    }
+	}
+	break;
+    case END_DEPEND_FUNC:
+	printf("TAG End DF\n");
+	break;
+    case IO_PORT_DESC:
+	printf("    I/O Range 0x%x .. 0x%x, alignment 0x%x, len 0x%x\n",
+	    resinfo[1] + (resinfo[2] << 8),
+	    resinfo[3] + (resinfo[4] << 8),
+	    resinfo[5], resinfo[6] );
+	if (resinfo[0])
+	    printf("\t[16-bit addr]\n");
+	else
+	    printf("\t[not 16-bit addr]\n");
+	break;
+    case FIXED_IO_PORT_DESC:
+	printf ("    FIXED I/O base address 0x%x length 0x%x\n",
+	    resinfo[0] + ( (resinfo[1] & 3 ) << 8), /* XXX */
+	    resinfo[2]);
+	break;
+#ifdef DIAGNOSTIC
+    case SM_RES_RESERVED:
+	printf("Reserved Tag Detected\n");
+	break;
+#endif
+    case SM_VENDOR_DEFINED:
+	printf("*** Small Vendor Tag Detected\n");
+	break;
+    case END_TAG:
+	printf("End Tag\n\n");
+	/* XXX Record and Verify Checksum */
+	return 1;
+	break;
+    }
+    return 0;
+}
+
+
+void
+handle_large_res(u_char *resinfo, int item, int len)
+{
+    int i;
+
+    DEB(printf("*** Large ITEM %d len %d found\n", item, len));
+    switch (item) {
+    case MEMORY_RANGE_DESC:
+	report_memory_info(resinfo[0]);
+	printf("Memory range minimum address: 0x%x\n",
+		(resinfo[1] << 8) + (resinfo[2] << 16));
+	printf("Memory range maximum address: 0x%x\n",
+		(resinfo[3] << 8) + (resinfo[4] << 16));
+	printf("Memory range base alignment: 0x%x\n",
+		(i = (resinfo[5] + (resinfo[6] << 8))) ? i : (1 << 16));
+	printf("Memory range length: 0x%x\n",
+		(resinfo[7] + (resinfo[8] << 8)) * 256);
+	break;
+    case ID_STRING_ANSI:
+	printf("Device Description: ");
+
+	for (i = 0; i < len; i++) {
+	    if (resinfo[i]) /* XXX */
+		printf("%c", resinfo[i]);
+	}
+	printf("\n");
+	break;
+    case ID_STRING_UNICODE:
+	printf("ID String Unicode Detected (Undefined)\n");
+	break;
+    case LG_VENDOR_DEFINED:
+	printf("Large Vendor Defined Detected\n");
+	break;
+    case _32BIT_MEM_RANGE_DESC:
+	printf("32bit Memory Range Desc Unimplemented\n");
+	break;
+    case _32BIT_FIXED_LOC_DESC:
+	printf("32bit Fixed Location Desc Unimplemented\n");
+	break;
+    case LG_RES_RESERVED:
+	printf("Large Reserved Tag Detected\n");
+	break;
+    }
+}
+
+
+/*
+ * Dump all the information about configurations.
+ */
+void
+dump_resdata(u_char *data, int csn)
+{
+    int i, large_len;
+
+    u_char tag, *resinfo;
+
+    DDB(printf("\nCard assigned CSN #%d\n", csn));
+    printf("Vendor ID %c%c%c%02x%02x (0x%08x), Serial Number 0x%08x\n",
+	    ((data[0] & 0x7c) >> 2) + 64,
+	    (((data[0] & 0x03) << 3) | ((data[1] & 0xe0) >> 5)) + 64,
+	    (data[1] & 0x1f) + 64, data[2], data[3],
+	    *(int *)&(data[0]),
+	    *(int *)&(data[4]));
+
+    pnp_write(SET_CSN, csn); /* Move this out of this function XXX */
+    outb(_PNP_ADDRESS, STATUS);
+
+    /* Allows up to 1kb of Resource Info,  Should be plenty */
+    for (i = 0; i < 1024; i++) {
+	if (!get_resource_info(&tag, 1))
+	    break;
+
+#define TYPE	(tag >> 7)
+#define	S_ITEM	(tag >> 3)
+#define S_LEN	(tag & 0x7)
+#define	L_ITEM	(tag & 0x7f)
+
+	if (TYPE == 0) {
+	    /* Handle small resouce data types */
+
+	    resinfo = malloc(S_LEN);
+	    if (!get_resource_info(resinfo, S_LEN))
+		break;
+
+	    if (handle_small_res(resinfo, S_ITEM, S_LEN) == 1)
+		break;
+	    free(resinfo);
+	} else {
+	    /* Handle large resouce data types */
+
+	    if (!get_resource_info((char *) &large_len, 2))
+		break;
+
+	    resinfo = malloc(large_len);
+	    if (!get_resource_info(resinfo, large_len))
+		break;
+
+	    handle_large_res(resinfo, L_ITEM, large_len);
+	    free(resinfo);
+	}
+    }
+    printf("Successfully got %d resources, %d logical fdevs\n", i,
+	    logdevs);
+    printf("-- card select # 0x%04x\n", pnp_read(SET_CSN));
+    printf("\nCSN %c%c%c%02x%02x (0x%08x), Serial Number 0x%08x\n",
+	    ((data[0] & 0x7c) >> 2) + 64,
+	    (((data[0] & 0x03) << 3) | ((data[1] & 0xe0) >> 5)) + 64,
+	    (data[1] & 0x1f) + 64, data[2], data[3],
+	    *(int *)&(data[0]),
+	    *(int *)&(data[4]));
+
+    for (i=0; i<logdevs; i++) {
+	int j;
+
+	pnp_write(SET_LDN, i);
+
+	printf("\nLogical device #%d\n", pnp_read(SET_LDN) );
+	printf("IO: ");
+	for (j=0; j<8; j++)
+	    printf(" 0x%04x", pnp_readw(IO_CONFIG_BASE + j*2));
+	printf("\nIRQ %d %d\n",
+	    pnp_read(IRQ_CONFIG), pnp_read(IRQ_CONFIG+2) );
+	printf("DMA %d %d\n",
+	    pnp_read(DRQ_CONFIG), pnp_read(DRQ_CONFIG+1) );
+	printf("IO range check 0x%02x activate 0x%02x\n",
+	    pnp_read(IO_RANGE_CHECK), pnp_read(ACTIVATE) );
+    }
+}
+
+
+/*
+ * Run the isolation protocol. Use rd_port as the READ_DATA port
+ * value (caller should try multiple READ_DATA locations before giving
+ * up). Upon exiting, all cards are aware that they should use rd_port
+ * as the READ_DATA port;
+ *
+ */
+int
+isolation_protocol()
+{
+    int csn;
+    u_char data[9];
+
+    send_Initiation_LFSR();
+
+    /* Reset CSN for All Cards */
+    pnp_write(CONFIG_CONTROL, 0x04);
+
+    for (csn = 1; (csn < MAX_PNP_CARDS); csn++) {
+	/* Wake up cards without a CSN */
+	logdevs = 0 ;
+	pnp_write(WAKE, 0);
+	pnp_write(SET_RD_DATA, rd_port);
+	outb(_PNP_ADDRESS, SERIAL_ISOLATION);
+	DELAY(1000);	/* Delay 1 msec */
+
+	if (get_serial(data))
+	    dump_resdata(data, csn);
+	else
+	    break;
+    }
+    return csn - 1;
+}
+
+
+void
+main()
+{
+    int num_pnp_devs;
+
+    /* Hey what about a i386_iopl() call :) */
+    if (open("/dev/io", O_RDONLY) < 0) {
+	fprintf (stderr, "pnpinfo: Can't get I/O privilege.\n");
+	exit (1);
+    }
+    printf("Checking for Plug-n-Play devices...\n");
+
+    /* Try various READ_DATA ports from 0x203-0x3ff */
+    for (rd_port = 0x80; (rd_port < 0xff); rd_port += 0x10) {
+	DEB(printf("Trying Read_Port at %x...\n", (rd_port << 2) | 0x3) );
+	num_pnp_devs = isolation_protocol(rd_port);
+	if (num_pnp_devs)
+	    break;
+    }
+    if (!num_pnp_devs) {
+	printf("No Plug-n-Play devices were found\n");
+	return;
+    }
+}
diff --git a/contrib/pnpinfo/pnpinfo.h b/contrib/pnpinfo/pnpinfo.h
new file mode 100644
index 0000000..5469891
--- /dev/null
+++ b/contrib/pnpinfo/pnpinfo.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 1996, Sujal M. Patel
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Sujal M. Patel
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *      $Id: pnpinfo.h,v 1.1 1996/01/08 00:48:32 smpatel Exp $
+ */
+
+
+/* Maximum Number of PnP Devices.  6 should be plenty */
+#define MAX_CARDS 6
+
+
+/* Static ports */
+#define ADDRESS			0x279
+#define WRITE_DATA		0xa79
+
+
+/* PnP Registers.  Write to ADDRESS and then use WRITE/READ_DATA */
+#define SET_RD_DATA		0x00
+#define SERIAL_ISOLATION	0x01
+#define WAKE			0x03
+#define	RESOURCE_DATA		0x04
+#define STATUS			0x05
+#define SET_CSN			0x06
+
+/* Small Resource Item names */
+#define PNP_VERSION		0x1
+#define LOG_DEVICE_ID		0x2
+#define COMP_DEVICE_ID		0x3
+#define IRQ_FORMAT		0x4
+#define DMA_FORMAT		0x5
+#define START_DEPEND_FUNC	0x6
+#define END_DEPEND_FUNC		0x7
+#define IO_PORT_DESC		0x8
+#define FIXED_IO_PORT_DESC	0x9
+#define SM_RES_RESERVED		0xa-0xd
+#define SM_VENDOR_DEFINED	0xe
+#define END_TAG			0xf
+
+/* Large Resource Item names */
+#define MEMORY_RANGE_DESC	0x1
+#define ID_STRING_ANSI		0x2
+#define ID_STRING_UNICODE	0x3
+#define LG_VENDOR_DEFINED	0x4
+#define _32BIT_MEM_RANGE_DESC	0x5
+#define _32BIT_FIXED_LOC_DESC	0x6
+#define LG_RES_RESERVED		0x7-0x7f