tools/firewire: add userspace front-end of nosy

This adds nosy-dump, the userspace part of nosy, the IEEE 1394 traffic
sniffer for Texas Instruments PCILynx/ PCILynx2 based cards.  Author is
Kristian Høgsberg.

The files added here are taken from
git://anongit.freedesktop.org/~krh/nosy commit ee29be97 (2009-11-10)
with the following changes by Stefan Richter:
  - Parts pertaining to the kernel module removed from Makefile.
  - dist target removed from the Makefile.
  - Mentioned nosy-dump in the Kconfig help to nosy's kernel component.
  - Add copyright notice to nosy-dump.c.  This is a duplicate of the
    respective notice in the kernel component nosy.c except for a time
    span of 2002 - 2006, according to Kristian's git log.

"git shortlog decode-fcp.c list.h nosy-dump.[ch]" from nosy's git
repository:

Jonathan Woithe (1):
      Save logs on Ctrl-C

Kristian Høgsberg (11):
      Pull over nosy from mercurial repo.
      Remove some fields from default view, add logging feature.
      Use infinite time out for poll(), mark more detail fields.
      Fix byte ordering macro.
      Add decoding of iso data and lock packets.
      Add flag to indicate data length field.
      Add cycle start packet decoding, add --iso and --cycle-start flags.
      Distinguish between phy-packets and 0-length iso data.
      Fix transaction and stats view.
      Add simple AV/C decoder.
      Don't break down on big payloads.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Acked-by: Kristian Høgsberg <krh@bitplanet.net>

7 files changed, 1652 insertions, 1 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index d329b05..70c9938 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2256,6 +2256,7 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6.git
 S:	Maintained
 F:	drivers/firewire/
 F:	include/linux/firewire*.h
+F:	tools/firewire/
 
 FIRMWARE LOADER (request_firmware)
 S:	Orphan
diff --git a/drivers/firewire/Kconfig b/drivers/firewire/Kconfig
index c4edc34..fcf3ea2 100644
--- a/drivers/firewire/Kconfig
+++ b/drivers/firewire/Kconfig
@@ -85,7 +85,8 @@ config FIREWIRE_NOSY
 	  Apple Power Mac G3 blue & white (onboard controller).
 
 	  To compile this driver as a module, say M here:  The module will be
-	  called nosy.
+	  called nosy.  Source code of a userspace interface to nosy, called
+	  nosy-dump, can be found in tools/firewire/ of the kernel sources.
 
 	  If unsure, say N.
 
diff --git a/tools/firewire/Makefile b/tools/firewire/Makefile
new file mode 100644
index 0000000..6afcdc2
--- /dev/null
+++ b/tools/firewire/Makefile
@@ -0,0 +1,19 @@
+version = 0.3
+prefix = /usr
+
+CC = gcc
+
+all : nosy-dump
+
+nosy-dump : CFLAGS = -Wall -O2 -g
+nosy-dump : CPPFLAGS = -DVERSION=\"$(version)\" -I../../drivers/firewire
+nosy-dump : LDFLAGS = -g
+nosy-dump : LDLIBS = -lpopt
+
+nosy-dump : nosy-dump.o decode-fcp.o
+
+clean :
+	rm -rf *.o nosy-dump
+
+install :
+	install nosy-dump $(prefix)/bin/nosy-dump
diff --git a/tools/firewire/decode-fcp.c b/tools/firewire/decode-fcp.c
new file mode 100644
index 0000000..cb9a31b
--- /dev/null
+++ b/tools/firewire/decode-fcp.c
@@ -0,0 +1,239 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include "list.h"
+#include "nosy-dump.h"
+
+#define CSR_FCP_COMMAND			0xfffff0000b00ull
+#define CSR_FCP_RESPONSE		0xfffff0000d00ull
+
+static const char * const ctype_names[16] = {
+    "control",
+    "status",
+    "specific inquiry",
+    "notify",
+    "general inquiry",
+    "(reserved 0x05)",
+    "(reserved 0x06)",
+    "(reserved 0x07)",
+    "not implemented",
+    "accepted",
+    "rejected",
+    "in transition",
+    "stable",
+    "changed",
+    "(reserved 0x0e)",
+    "interim"
+};
+
+static const char * const subunit_type_names[32] = {
+    "monitor",
+    "audio",
+    "printer",
+    "disc",
+    "tape recorder/player",
+    "tuner",
+    "ca",
+    "camera",
+    "(reserved 0x08)",
+    "panel",
+    "bulletin board",
+    "camera storage",
+    "(reserved 0x0c)",
+    "(reserved 0x0d)",
+    "(reserved 0x0e)",
+    "(reserved 0x0f)",
+    "(reserved 0x10)",
+    "(reserved 0x11)",
+    "(reserved 0x12)",
+    "(reserved 0x13)",
+    "(reserved 0x14)",
+    "(reserved 0x15)",
+    "(reserved 0x16)",
+    "(reserved 0x17)",
+    "(reserved 0x18)",
+    "(reserved 0x19)",
+    "(reserved 0x1a)",
+    "(reserved 0x1b)",
+    "vendor unique",
+    "all subunit types",
+    "subunit_type extended to next byte",
+    "unit"
+};
+
+struct avc_enum {
+    int value;
+    const char *name;
+};
+
+struct avc_field {
+  const char *name;	/* Short name for field. */
+  int offset;		/* Location of field, specified in bits.
+			 * Negative means from end of packet */
+  int width;		/* Width of field, 0 means use data_length. */
+  struct avc_enum *names;
+};
+
+struct avc_opcode_info {
+    const char *name;
+    struct avc_field fields[8];
+};
+
+struct avc_enum power_field_names[] = {
+    { 0x70, "on" },
+    { 0x60, "off" },
+    { }
+};
+
+static const struct avc_opcode_info opcode_info[256] = {
+
+    /* TA Document 1999026
+     * AV/C Digital Interface Command Set General Specification
+     * Version 4.0 */
+    [0xb2] =
+    { "power", {
+	    { "state", 0, 8, power_field_names }
+	}
+    },
+    [0x30] =
+    { "unit info", {
+	    { "foo", 0, 8 },
+	    { "unit_type", 8, 5 },
+	    { "unit", 13, 3 },
+	    { "company id", 16, 24 },
+	}
+    },
+    [0x31] = { "subunit info" },
+    [0x01] = { "reserve" },
+    [0xb0] = { "version" },
+    [0x00] = { "vendor dependent" },
+
+    [0x02] = { "plug info" },
+    [0x12] = { "channel usage" },
+    [0x24] = { "connect" },
+    [0x20] = { "connect av" },
+    [0x22] = { "connections" },
+    [0x11] = { "digital input" },
+    [0x10] = { "digital output" },
+    [0x25] = { "disconnect" },
+    [0x21] = { "disconnect av" },
+    [0x19] = { "input plug signal format" },
+    [0x18] = { "output plug signal format" },
+    [0x1f] = { "general bus setup" },
+
+    /* TA Document 1999025
+     * AV/C Descriptor Mechanism Specification Version 1.0 */
+    [0x0c] = { "create descriptor" },
+    [0x08] = { "open descriptor" },
+    [0x09] = { "read descriptor" },
+    [0x0a] = { "write descriptor" },
+    [0x05] = { "open info block" },
+    [0x06] = { "read info block" },
+    [0x07] = { "write info block" },
+    [0x0b] = { "search descriptor" },
+    [0x0d] = { "object number select" },
+
+    /* TA Document 1999015
+     * AV/C Command Set for Rate Control of Isochronous Data Flow 1.0 */
+    [0xb3] = { "rate", {
+	    { "subfunction", 0, 8 },
+	    { "result", 8, 8 },
+	    { "plug_type", 16, 8 },
+	    { "plug_id", 16, 8 },
+	}
+    },
+
+    /* TA Document 1999008
+     * AV/C Audio Subunit Specification 1.0 */
+    [0xb8] = { "function block" },
+
+    /* TA Document 2001001
+     * AV/C Panel Subunit Specification 1.1 */
+    [0x7d] = { "gui update" },
+    [0x7e] = { "push gui data" },
+    [0x7f] = { "user action" },
+    [0x7c] = { "pass through" },
+
+    /* */
+    [0x26] = { "asynchronous connection" },
+};
+
+struct avc_frame {
+    unsigned int operand0 : 8;
+    unsigned int opcode : 8;
+    unsigned int subunit_id : 3;
+    unsigned int subunit_type : 5;
+    unsigned int ctype : 4;
+    unsigned int cts : 4;
+};
+
+static void
+decode_avc(struct link_transaction *t)
+{
+    struct avc_frame *frame = (struct avc_frame *) t->request->packet.write_block.data;
+    const struct avc_opcode_info *info;
+    const char *name;
+    char buffer[32];
+    int i;
+
+    info = &opcode_info[frame->opcode];
+    if (info->name == NULL) {
+	snprintf(buffer, sizeof buffer, "(unknown opcode 0x%02x)", frame->opcode);
+	name = buffer;
+    } else {
+	name = info->name;
+    }
+
+    printf("av/c %s, subunit_type=%s, subunit_id=%d, opcode=%s",
+	   ctype_names[frame->ctype], subunit_type_names[frame->subunit_type],
+	   frame->subunit_id, name);
+
+    for (i = 0; info->fields[i].name != NULL; i++) {
+	printf(", %s", info->fields[i].name);
+    }
+
+    printf("\n");
+}
+
+
+int
+decode_fcp(struct link_transaction *t)
+{
+    struct avc_frame *frame = (struct avc_frame *) t->request->packet.write_block.data;
+    unsigned long long offset;
+
+    offset = ((unsigned long long) t->request->packet.common.offset_high << 32) |
+	t->request->packet.common.offset_low;
+
+    if (t->request->packet.common.tcode != TCODE_WRITE_BLOCK)
+	return 0;
+
+    if (offset == CSR_FCP_COMMAND || offset == CSR_FCP_RESPONSE) {
+	switch (frame->cts) {
+	case 0x00:
+	    decode_avc(t);
+	    break;
+	case 0x01:
+	    printf("cal fcp frame (cts=0x01)\n");
+	    break;
+	case 0x02:
+	    printf("ehs fcp frame (cts=0x02)\n");
+	    break;
+	case 0x03:
+	    printf("havi fcp frame (cts=0x03)\n");
+	    break;
+	case 0x0e:
+	    printf("vendor specific fcp frame (cts=0x0e)\n");
+	    break;
+	case 0x0f:
+	    printf("extended cts\n");
+	    break;
+	default:
+	    printf("reserved fcp frame (ctx=0x%02x)\n", frame->cts);
+	    break;
+	}
+	return 1;
+    }
+
+    return 0;
+}
+
diff --git a/tools/firewire/list.h b/tools/firewire/list.h
new file mode 100644
index 0000000..fa119dd
--- /dev/null
+++ b/tools/firewire/list.h
@@ -0,0 +1,62 @@
+struct list {
+  struct list *next, *prev;
+};
+
+static inline void
+list_init(struct list *list)
+{
+  list->next = list;
+  list->prev = list;
+}
+
+static inline int
+list_empty(struct list *list)
+{
+  return list->next == list;
+}
+
+static inline void
+list_insert(struct list *link, struct list *new_link)
+{
+  new_link->prev       = link->prev;
+  new_link->next       = link;
+  new_link->prev->next = new_link;
+  new_link->next->prev = new_link;
+}
+
+static inline void
+list_append(struct list *list, struct list *new_link)
+{
+  list_insert((struct list *)list, new_link);
+}
+
+static inline void
+list_prepend(struct list *list, struct list *new_link)
+{
+  list_insert(list->next, new_link);
+}
+
+static inline void
+list_remove(struct list *link)
+{
+  link->prev->next = link->next;
+  link->next->prev = link->prev;
+}
+
+#define list_entry(link, type, member) \
+	((type *)((char *)(link)-(unsigned long)(&((type *)0)->member)))
+
+#define list_head(list, type, member)		\
+	list_entry((list)->next, type, member)
+
+#define list_tail(list, type, member)		\
+	list_entry((list)->prev, type, member)
+
+#define list_next(elm, member)					\
+	list_entry((elm)->member.next, typeof(*elm), member)
+
+#define list_for_each_entry(pos, list, member)			\
+	for (pos = list_head(list, typeof(*pos), member);	\
+	     &pos->member != (list);				\
+	     pos = list_next(pos, member))
+
diff --git a/tools/firewire/nosy-dump.c b/tools/firewire/nosy-dump.c
new file mode 100644
index 0000000..64e5ea4
--- /dev/null
+++ b/tools/firewire/nosy-dump.c
@@ -0,0 +1,1037 @@
+/* -*- mode: c; c-basic-offset: 2 -*- */
+
+/*
+ * nosy-dump - Interface to snoop mode driver for TI PCILynx 1394 controllers
+ * Copyright (C) 2002-2006 Kristian Høgsberg
+ *
+ * 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 <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <endian.h>
+#include <popt.h>
+#include <poll.h>
+#include <byteswap.h>
+#include <termios.h>
+
+#include <signal.h>
+
+#include "list.h"
+#include "nosy-user.h"
+#include "nosy-dump.h"
+
+enum {
+  PACKET_FIELD_DETAIL		= 0x01,
+  PACKET_FIELD_DATA_LENGTH	= 0x02,
+  /* Marks the fields we print in transaction view. */
+  PACKET_FIELD_TRANSACTION	= 0x04
+};
+
+static void
+print_packet(unsigned long *data, size_t length);
+static void
+decode_link_packet(struct link_packet *packet, size_t length,
+		   int include_flags, int exclude_flags);
+
+static int   run = 1;
+sig_t sys_sigint_handler;
+
+static char *option_nosy_device = "/dev/nosy";
+static char *option_view = "packet";
+static char *option_output = NULL;
+static char *option_input = NULL;
+static int   option_hex;
+static int   option_iso;
+static int   option_cycle_start;
+static int   option_version;
+static int   option_verbose;
+
+enum {
+  VIEW_TRANSACTION,
+  VIEW_PACKET,
+  VIEW_STATS
+};
+
+static const struct poptOption options[] = {
+  {
+    longName:	"device",
+    shortName:	'd',
+    argInfo:	POPT_ARG_STRING,
+    arg:	&option_nosy_device,
+    descrip:	"Path to nosy device.",
+    argDescrip:	"DEVICE"
+  },
+  {
+    longName:	"view",
+    argInfo:	POPT_ARG_STRING,
+    arg:	&option_view,
+    descrip:	"Specify view of bus traffic: packet, transaction or stats.",
+    argDescrip:	"VIEW"
+  },
+  {
+    longName:	"hex",
+    shortName:	'x',
+    argInfo:	POPT_ARG_NONE,
+    arg:	&option_hex,
+    descrip:	"Print each packet in hex.",
+  },
+  {
+    longName:	"iso",
+    argInfo:	POPT_ARG_NONE,
+    arg:	&option_iso,
+    descrip:	"Print iso packets.",
+  },
+  {
+    longName:	"cycle-start",
+    argInfo:	POPT_ARG_NONE,
+    arg:	&option_cycle_start,
+    descrip:	"Print cycle start packets.",
+  },
+  {
+    longName:	"verbose",
+    shortName:	'v',
+    argInfo:	POPT_ARG_NONE,
+    arg:	&option_verbose,
+    descrip:	"Verbose packet view.",
+  },
+  {
+    longName:	"output",
+    shortName:	'o',
+    argInfo:	POPT_ARG_STRING,
+    arg:	&option_output,
+    descrip:	"Log to output file.",
+    argDescrip:	"FILENAME"
+  },
+  {
+    longName:	"input",
+    shortName:	'i',
+    argInfo:	POPT_ARG_STRING,
+    arg:	&option_input,
+    descrip:	"Decode log from file.",
+    argDescrip:	"FILENAME"
+  },
+  {
+    longName:	"version",
+    argInfo:	POPT_ARG_NONE,
+    arg:	&option_version,
+    descrip:	"Specify print version info.",
+  },
+  POPT_AUTOHELP
+  POPT_TABLEEND
+};
+
+void 
+sigint_handler(int signal_num)
+{
+  if (run == 1) {
+    run = 0;
+    /* Allow all Ctrl-C's except the first to interrupt the program in
+     * the usual way.
+     */
+    signal(SIGINT, SIG_DFL);
+  }
+}
+
+struct subaction *
+subaction_create(unsigned long *data, size_t length)
+{
+  struct subaction *sa;
+
+  /* we put the ack in the subaction struct for easy access. */
+  sa = malloc(sizeof *sa - sizeof sa->packet + length);
+  sa->ack = data[length / 4 - 1];
+  sa->length = length;
+  memcpy (&sa->packet, data, length);
+
+  return sa;
+}
+
+void
+subaction_destroy(struct subaction *sa)
+{
+  free(sa);
+}
+
+struct list pending_transaction_list =
+  { &pending_transaction_list, &pending_transaction_list };
+
+struct link_transaction *
+link_transaction_lookup(int request_node, int response_node, int tlabel)
+{
+  struct link_transaction *t;
+
+  list_for_each_entry(t, &pending_transaction_list, link) {
+    if (t->request_node == request_node &&
+	t->response_node == response_node &&
+	t->tlabel == tlabel)
+      return t;
+  }
+
+  t = malloc(sizeof *t);
+  t->request_node = request_node;
+  t->response_node = response_node;
+  t->tlabel = tlabel;
+  list_init(&t->request_list);
+  list_init(&t->response_list);
+  
+  list_append(&pending_transaction_list, &t->link);
+  
+  return t;
+}
+
+void
+link_transaction_destroy(struct link_transaction *t)
+{
+  while (!list_empty(&t->request_list)) {
+    struct subaction *sa = list_head(&t->request_list, struct subaction, link);
+    list_remove(&sa->link);
+    subaction_destroy(sa);
+  }    
+
+  while (!list_empty(&t->response_list)) {
+    struct subaction *sa = list_head(&t->response_list, struct subaction, link);
+    list_remove(&sa->link);
+    subaction_destroy(sa);
+  }    
+  
+  free(t);
+}
+
+struct protocol_decoder {
+  const char *name;
+  int (*decode)(struct link_transaction *t);
+};
+
+static struct protocol_decoder protocol_decoders[] = {
+  { "FCP", decode_fcp }
+};
+
+void
+handle_transaction(struct link_transaction *t)
+{
+  struct subaction *sa;
+  int i;
+
+  for (i = 0; i < array_length(protocol_decoders); i++)
+    if (protocol_decoders[i].decode(t))
+      break;
+
+  /* HACK: decode only fcp right now. */
+  return;
+
+  decode_link_packet(&t->request->packet, t->request->length,
+		     PACKET_FIELD_TRANSACTION, 0);
+  if (t->response)
+    decode_link_packet(&t->response->packet, t->request->length,
+		       PACKET_FIELD_TRANSACTION, 0);
+  else
+    printf("[no response]");
+
+  if (option_verbose) {
+    list_for_each_entry(sa, &t->request_list, link)
+      print_packet((unsigned long *) &sa->packet, sa->length);
+    list_for_each_entry(sa, &t->response_list, link)
+      print_packet((unsigned long *) &sa->packet, sa->length);
+  }
+  printf("\r\n");
+
+  link_transaction_destroy(t);
+}
+
+void
+clear_pending_transaction_list(void)
+{
+  struct link_transaction *t;
+
+  while (!list_empty(&pending_transaction_list)) {
+    t = list_head(&pending_transaction_list, struct link_transaction, link);
+    list_remove(&t->link);
+    link_transaction_destroy(t);
+    /* print unfinished transactions */
+  }    
+}
+
+static const char * const tcode_names[] = {
+  "write_quadlet_request",
+  "write_block_request",
+  "write_response",
+  "reserved",
+  "read_quadlet_request",
+  "read_block_request",
+  "read_quadlet_response",
+  "read_block_response",
+  "cycle_start",
+  "lock_request",
+  "iso_data",
+  "lock_response"
+};
+
+static const char * const ack_names[] = {
+  "no ack",
+  "ack_complete",
+  "ack_pending",
+  "reserved (0x03)",
+  "ack_busy_x",
+  "ack_busy_a",
+  "ack_busy_b",
+  "reserved (0x07)",
+  "reserved (0x08)",
+  "reserved (0x09)",
+  "reserved (0x0a)",
+  "reserved (0x0b)",
+  "reserved (0x0c)",
+  "ack_data_error",
+  "ack_type_error",
+  "reserved (0x0f)",
+};
+
+static const char * const rcode_names[] = {
+  "complete",
+  "reserved (0x01)",
+  "reserved (0x02)",
+  "reserved (0x03)",
+  "conflict_error",
+  "data_error",
+  "type_error",
+  "address_error",
+};
+
+static const char * const retry_names[] = {
+  "retry_1",
+  "retry_x",
+  "retry_a",
+  "retry_b",
+};
+
+enum {
+  PACKET_RESERVED,
+  PACKET_REQUEST,
+  PACKET_RESPONSE,
+  PACKET_OTHER,
+};
+
+struct packet_info {
+  const char *name;
+  int type;
+  int response_tcode;
+  struct packet_field *fields;
+  int field_count;
+};
+
+struct packet_field {
+  const char *name;	/* Short name for field. */
+  int offset;		/* Location of field, specified in bits.
+			 * Negative means from end of packet */
+  int width;		/* Width of field, 0 means use data_length. */
+  int flags;		/* Show options. */
+  const char * const *value_names;
+};
+
+#define COMMON_REQUEST_FIELDS					\
+  { "dest", 0, 16, PACKET_FIELD_TRANSACTION },			\
+  { "tl", 16, 6 },						\
+  { "rt", 22, 2, PACKET_FIELD_DETAIL, retry_names },		\
+  { "tcode", 24, 4, PACKET_FIELD_TRANSACTION, tcode_names },	\
+  { "pri", 28, 4, PACKET_FIELD_DETAIL },			\
+  { "src", 32, 16, PACKET_FIELD_TRANSACTION },			\
+  { "offs", 48, 48, PACKET_FIELD_TRANSACTION }
+
+#define COMMON_RESPONSE_FIELDS					\
+  { "dest", 0, 16 },						\
+  { "tl", 16, 6 },						\
+  { "rt", 22, 2, PACKET_FIELD_DETAIL, retry_names },		\
+  { "tcode", 24, 4, 0, tcode_names },				\
+  { "pri", 28, 4, PACKET_FIELD_DETAIL },			\
+  { "src", 32, 16 },						\
+  { "rcode", 48, 4, PACKET_FIELD_TRANSACTION, rcode_names }
+
+struct packet_field read_quadlet_request_fields[] = {
+  COMMON_REQUEST_FIELDS,
+  { "crc", 96, 32, PACKET_FIELD_DETAIL },
+  { "ack", 156, 4, 0, ack_names }
+};
+
+struct packet_field read_quadlet_response_fields[] = {
+  COMMON_RESPONSE_FIELDS,
+  { "data", 96, 32, PACKET_FIELD_TRANSACTION },
+  { "crc", 128, 32, PACKET_FIELD_DETAIL },
+  { "ack", 188, 4, 0, ack_names }
+};
+
+struct packet_field read_block_request_fields[] = {
+  COMMON_REQUEST_FIELDS,
+  { "data_length", 96, 16, PACKET_FIELD_TRANSACTION },
+  { "extended_tcode", 112, 16 },
+  { "crc", 128, 32, PACKET_FIELD_DETAIL },
+  { "ack", 188, 4, 0, ack_names },
+};
+
+struct packet_field block_response_fields[] = {
+  COMMON_RESPONSE_FIELDS,
+  { "data_length", 96, 16, PACKET_FIELD_DATA_LENGTH },
+  { "extended_tcode", 112, 16 },
+  { "crc", 128, 32, PACKET_FIELD_DETAIL },
+  { "data", 160, 0, PACKET_FIELD_TRANSACTION },
+  { "crc", -64, 32, PACKET_FIELD_DETAIL },
+  { "ack", -4, 4, 0, ack_names }
+};
+
+struct packet_field write_quadlet_request_fields[] = {
+  COMMON_REQUEST_FIELDS,
+  { "data", 96, 32, PACKET_FIELD_TRANSACTION },
+  { "ack", -4, 4, 0, ack_names }
+};
+
+struct packet_field block_request_fields[] = {
+  COMMON_REQUEST_FIELDS,
+  { "data_length", 96, 16, PACKET_FIELD_DATA_LENGTH | PACKET_FIELD_TRANSACTION },
+  { "extended_tcode", 112, 16, PACKET_FIELD_TRANSACTION },
+  { "crc", 128, 32, PACKET_FIELD_DETAIL },
+  { "data", 160, 0, PACKET_FIELD_TRANSACTION },
+  { "crc", -64, 32, PACKET_FIELD_DETAIL },
+  { "ack", -4, 4, 0, ack_names }
+};
+
+struct packet_field write_response_fields[] = {
+  COMMON_RESPONSE_FIELDS,
+  { "reserved", 64, 32, PACKET_FIELD_DETAIL },
+  { "ack", -4, 4, 0, ack_names }
+};
+
+struct packet_field iso_data_fields[] = {
+  { "data_length", 0, 16, PACKET_FIELD_DATA_LENGTH },
+  { "tag", 16, 2 },
+  { "channel", 18, 6 },
+  { "tcode", 24, 4, 0, tcode_names },
+  { "sy", 28, 4 },
+  { "crc", 32, 32, PACKET_FIELD_DETAIL },
+  { "data", 64, 0 },
+  { "crc", -64, 32, PACKET_FIELD_DETAIL },
+  { "ack", -4, 4, 0, ack_names }
+};
+
+static struct packet_info packet_info[] = {
+  {
+    .name =		"write_quadlet_request",
+    .type =		PACKET_REQUEST,
+    .response_tcode =	TCODE_WRITE_RESPONSE,
+    .fields =		write_quadlet_request_fields,
+    .field_count =	array_length(write_quadlet_request_fields)
+  },
+  {
+    .name =		"write_block_request",
+    .type =		PACKET_REQUEST,
+    .response_tcode = 	TCODE_WRITE_RESPONSE,
+    .fields =		block_request_fields,
+    .field_count =	array_length(block_request_fields)
+  },
+  {
+    .name =		"write_response",
+    .type =		PACKET_RESPONSE,
+    .fields =		write_response_fields,
+    .field_count =	array_length(write_response_fields)
+  },
+  {
+    .name =		"reserved",
+    .type =		PACKET_RESERVED,
+  },
+  {
+    .name =		"read_quadlet_request",
+    .type =		PACKET_REQUEST,
+    .response_tcode = 	TCODE_READ_QUADLET_RESPONSE,
+    .fields =		read_quadlet_request_fields,
+    .field_count =	array_length(read_quadlet_request_fields)
+  },
+  {
+    .name =		"read_block_request",
+    .type =		PACKET_REQUEST,
+    .response_tcode = 	TCODE_READ_BLOCK_RESPONSE,
+    .fields =		read_block_request_fields,
+    .field_count =	array_length(read_block_request_fields)
+  },
+  {
+    .name =		"read_quadlet_response",
+    .type =		PACKET_RESPONSE,
+    .fields =		read_quadlet_response_fields,
+    .field_count =	array_length(read_quadlet_response_fields)
+  },
+  {
+    .name =		"read_block_response",
+    .type =		PACKET_RESPONSE,
+    .fields =		block_response_fields,
+    .field_count =	array_length(block_response_fields)
+  },
+  {
+    .name =		"cycle_start",
+    .type =		PACKET_OTHER,
+    .fields =		write_quadlet_request_fields,
+    .field_count =	array_length(write_quadlet_request_fields)
+  },
+  {
+    .name =		"lock_request",
+    .type =		PACKET_REQUEST,
+    .fields =		block_request_fields,
+    .field_count =	array_length(block_request_fields)
+  },
+  {
+    .name =		"iso_data",
+    .type =		PACKET_OTHER,
+    .fields =		iso_data_fields,
+    .field_count =	array_length(iso_data_fields)
+  },
+  {
+    .name =		"lock_response",
+    .type =		PACKET_RESPONSE,
+    .fields =		block_response_fields,
+    .field_count =	array_length(block_response_fields)
+  }
+};
+
+int
+handle_packet(unsigned long *data, size_t length)
+{
+  if (length == 0) {
+    printf("bus reset\r\n");
+    clear_pending_transaction_list();
+  }
+  else if (length > sizeof(struct phy_packet)) {
+    struct link_packet *p = (struct link_packet *) data;
+    struct subaction *sa, *prev;
+    struct link_transaction *t;
+
+    switch (packet_info[p->common.tcode].type) {
+    case PACKET_REQUEST:
+      t = link_transaction_lookup(p->common.source, p->common.destination,
+				  p->common.tlabel);
+      sa = subaction_create(data, length);
+      t->request = sa;
+
+      if (!list_empty(&t->request_list)) {
+	prev = list_tail(&t->request_list, struct subaction, link);
+
+	if (!ACK_BUSY(prev->ack)) {
+	  /* error, we should only see ack_busy_* before the
+	   * ack_pending/ack_complete -- this is an ack_pending
+	   * instead (ack_complete would have finished the
+	   * transaction). */
+	}
+	
+	if (prev->packet.common.tcode != sa->packet.common.tcode ||
+	    prev->packet.common.tlabel != sa->packet.common.tlabel)
+	  /* memcmp() ? */
+	  /* error, these should match for retries. */;
+      }
+
+      list_append(&t->request_list, &sa->link);
+
+      switch (sa->ack) {
+      case ACK_COMPLETE:
+	if (p->common.tcode != TCODE_WRITE_QUADLET &&
+	    p->common.tcode != TCODE_WRITE_BLOCK)
+	  /* error, unified transactions only allowed for write */;
+	list_remove(&t->link);
+	handle_transaction(t);
+	break;
+
+      case ACK_NO_ACK:
+      case ACK_DATA_ERROR:
+      case ACK_TYPE_ERROR:
+	list_remove(&t->link);
+	handle_transaction(t);
+	break;
+
+      case ACK_PENDING:
+	/* request subaction phase over, wait for response. */
+	break;
+
+      case ACK_BUSY_X:
+      case ACK_BUSY_A:
+      case ACK_BUSY_B:
+	/* ok, wait for retry. */
+	/* check that retry protocol is respected. */
+	break;
+      }
+      break;
+
+    case PACKET_RESPONSE:
+      t = link_transaction_lookup(p->common.destination, p->common.source,
+				  p->common.tlabel);
+      if (list_empty(&t->request_list)) {
+	/* unsolicited response */
+      }
+
+      sa = subaction_create(data, length);
+      t->response = sa;
+
+      if (!list_empty(&t->response_list)) {
+	prev = list_tail(&t->response_list, struct subaction, link);
+
+	if (!ACK_BUSY(prev->ack))
+	  /* error, we should only see ack_busy_* before the
+	   * ack_pending/ack_complete */;
+
+	if (prev->packet.common.tcode != sa->packet.common.tcode ||
+	    prev->packet.common.tlabel != sa->packet.common.tlabel)
+	  /* use memcmp() instead? */
+	  /* error, these should match for retries. */;
+      }
+      else {
+	prev = list_tail(&t->request_list, struct subaction, link);
+	if (prev->ack != ACK_PENDING) {
+	  /* error, should not get response unless last request got
+	   * ack_pending. */
+	}
+	
+	if (packet_info[prev->packet.common.tcode].response_tcode !=
+	    sa->packet.common.tcode) {
+	  /* error, tcode mismatch */
+	}
+      }
+      
+      list_append(&t->response_list, &sa->link);
+
+      switch (sa->ack) {
+      case ACK_COMPLETE:
+      case ACK_NO_ACK:
+      case ACK_DATA_ERROR:
+      case ACK_TYPE_ERROR:
+	list_remove(&t->link);
+	handle_transaction(t);
+	/* transaction complete, remove t from pending list. */
+	break;
+
+      case ACK_PENDING:
+	/* error for responses. */
+	break;
+
+      case ACK_BUSY_X:
+      case ACK_BUSY_A:
+      case ACK_BUSY_B:
+	/* no problem, wait for next retry */
+	break;
+      }
+      
+      break;
+
+    case PACKET_OTHER:
+    case PACKET_RESERVED:
+      return 0;
+    }
+  }
+
+  return 1;
+}
+
+unsigned int get_bits(struct link_packet *packet, int offset, int width)
+{
+  unsigned long *data = (unsigned long *) packet;
+  unsigned long index, shift, mask;
+
+  index = offset / 32 + 1;
+  shift = 32 - (offset & 31) - width;
+  mask = width == 32 ? ~0 : (1 << width) - 1;
+
+  return (data[index] >> shift) & mask;
+}
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define byte_index(i) ((i) ^ 3)
+#elif __BYTE_ORDER == __BIG_ENDIAN
+#define byte_index(i) (i)
+#else
+#error unsupported byte order.
+#endif
+
+void dump_data(unsigned char *data, int length)
+{
+  int i, print_length;
+
+  if (length > 128)
+    print_length = 128;
+  else
+    print_length = length;
+
+  for (i = 0; i < print_length; i++)
+    printf("%s%02hhx",
+	   (i % 4 == 0 && i != 0) ? " " : "",
+	   data[byte_index(i)]);
+
+  if (print_length < length)
+    printf(" (%d more bytes)", length - print_length);
+}
+
+static void
+decode_link_packet(struct link_packet *packet, size_t length,
+		   int include_flags, int exclude_flags)
+{
+  struct packet_info *pi;
+  int data_length = 0;
+  int i;
+
+  pi = &packet_info[packet->common.tcode];
+
+  for (i = 0; i < pi->field_count; i++) {
+    struct packet_field *f = &pi->fields[i];
+    int offset;
+
+    if (f->flags & exclude_flags)
+      continue;
+    if (include_flags && !(f->flags & include_flags))
+      continue;
+
+    if (f->offset < 0)
+      offset = length * 8 + f->offset - 32;
+    else
+      offset = f->offset;
+
+    if (f->value_names != NULL) {
+      unsigned long bits;
+
+      bits = get_bits(packet, offset, f->width);
+      printf("%s", f->value_names[bits]);
+    }
+    else if (f->width == 0) {
+      printf("%s=[", f->name);
+      dump_data((unsigned char *) packet + (offset / 8 + 4), data_length);
+      printf("]");
+    }
+    else {
+      unsigned long long bits;
+      int high_width, low_width;
+
+      if ((offset & ~31) != ((offset + f->width - 1) & ~31)) {
+	/* Bit field spans quadlet boundary. */
+	high_width = ((offset + 31) & ~31) - offset;
+	low_width = f->width - high_width;
+
+	bits = get_bits(packet, offset, high_width);
+	bits = (bits << low_width) |
+	  get_bits(packet, offset + high_width, low_width);
+      }
+      else
+	bits = get_bits(packet, offset, f->width);
+
+      printf("%s=0x%0*llx", f->name, (f->width + 3) / 4, bits);
+
+      if (f->flags & PACKET_FIELD_DATA_LENGTH)
+	data_length = bits;
+    }
+
+    if (i < pi->field_count - 1)
+      printf(", ");
+  }
+}
+
+static void
+print_packet(unsigned long *data, size_t length)
+{
+  int i;
+
+  printf("%6lu  ", data[0]);
+
+  if (length == 4)
+    printf("bus reset");
+  else if (length < sizeof(struct phy_packet)) {
+    printf("short packet: ");
+    for (i = 1; i < length / 4; i++)
+      printf("%s%08lx", i == 0 ? "[" : " ", data[i]);
+    printf("]");
+
+  }
+  else if (length == sizeof(struct phy_packet) && data[1] == ~data[2]) {
+    struct phy_packet *pp = (struct phy_packet *) data;
+
+    /* phy packet are 3 quadlets: the 1 quadlet payload,
+     * the bitwise inverse of the payload and the snoop
+     * mode ack */
+
+    switch (pp->common.identifier) {
+    case PHY_PACKET_CONFIGURATION:
+      if (!pp->phy_config.set_root && !pp->phy_config.set_gap_count) {
+	printf("ext phy config: phy_id=%02x", pp->phy_config.root_id);
+      }
+      else {
+	printf("phy config:");
+	if (pp->phy_config.set_root)
+	  printf(" set_root_id=%02x", pp->phy_config.root_id);
+	if (pp->phy_config.set_gap_count)
+	  printf(" set_gap_count=%d", pp->phy_config.gap_count);
+      }
+      break;
+
+    case PHY_PACKET_LINK_ON:
+      printf("link-on packet, phy_id=%02x", pp->link_on.phy_id);
+      break;
+
+    case PHY_PACKET_SELF_ID:
+      if (pp->self_id.extended) {
+	printf("extended self id: phy_id=%02x, seq=%d",
+	       pp->ext_self_id.phy_id, pp->ext_self_id.sequence);
+      }
+      else {
+	static const char * const speed_names[] = {
+	  "S100", "S200", "S400", "BETA"
+	};
+	printf("self id: phy_id=%02x, link %s, gap_count=%d, speed=%s%s%s", 
+	       pp->self_id.phy_id,
+	       (pp->self_id.link_active ? "active" : "not active"),
+	       pp->self_id.gap_count,
+	       speed_names[pp->self_id.phy_speed],
+	       (pp->self_id.contender ? ", irm contender" : ""),
+	       (pp->self_id.initiated_reset ? ", initiator" : ""));
+	       
+      }
+      break;
+    default:
+      printf("unknown phy packet: ");
+      for (i = 1; i < length / 4; i++)
+	printf("%s%08lx", i == 0 ? "[" : " ", data[i]);
+      printf("]");
+      break;
+    }
+  }
+  else {
+    struct link_packet *packet = (struct link_packet *) data;
+
+    decode_link_packet(packet, length, 0,
+		       option_verbose ? 0 : PACKET_FIELD_DETAIL);
+  }
+
+  if (option_hex) {
+    printf("  [");
+    dump_data((unsigned char *) data + 4, length - 4);
+    printf("]");
+  }
+
+  printf("\r\n");
+}
+
+#define HIDE_CURSOR	"\033[?25l"
+#define SHOW_CURSOR	"\033[?25h"
+#define CLEAR		"\033[H\033[2J"
+
+static void
+print_stats(unsigned long *data, size_t length)
+{
+  static int bus_reset_count, short_packet_count, phy_packet_count;
+  static int tcode_count[16];
+  static struct timeval last_update;
+  struct timeval now;
+  int i;
+
+  if (length == 0)
+    bus_reset_count++;
+  else if (length < sizeof(struct phy_packet))
+    short_packet_count++;
+  else if (length == sizeof(struct phy_packet) && data[1] == ~data[2])
+    phy_packet_count++;
+  else {
+    struct link_packet *packet = (struct link_packet *) data;
+    tcode_count[packet->common.tcode]++;
+  }
+
+  gettimeofday(&now, NULL);
+  if (now.tv_sec <= last_update.tv_sec &&
+      now.tv_usec < last_update.tv_usec + 500000)
+    return;
+  
+  last_update = now;
+  printf(CLEAR HIDE_CURSOR
+	 "  bus resets              : %8d\n"
+	 "  short packets           : %8d\n"
+	 "  phy packets             : %8d\n",
+	 bus_reset_count, short_packet_count, phy_packet_count);
+
+  for (i = 0; i < array_length(packet_info); i++)
+    if (packet_info[i].type != PACKET_RESERVED)
+      printf("  %-24s: %8d\n", packet_info[i].name, tcode_count[i]);
+  printf(SHOW_CURSOR "\n");
+}
+
+struct termios saved_attributes;
+
+void
+reset_input_mode (void)
+{
+  tcsetattr (STDIN_FILENO, TCSANOW, &saved_attributes);
+}
+
+void
+set_input_mode (void)
+{
+  struct termios tattr;
+
+  /* Make sure stdin is a terminal. */
+  if (!isatty(STDIN_FILENO)) {
+    fprintf(stderr, "Not a terminal.\n");
+    exit(EXIT_FAILURE);
+  }
+
+  /* Save the terminal attributes so we can restore them later. */
+  tcgetattr(STDIN_FILENO, &saved_attributes);
+  atexit(reset_input_mode);
+
+  /* Set the funny terminal modes. */
+  tcgetattr(STDIN_FILENO, &tattr);
+  tattr.c_lflag &= ~(ICANON|ECHO); /* Clear ICANON and ECHO. */
+  tattr.c_cc[VMIN] = 1;
+  tattr.c_cc[VTIME] = 0;
+  tcsetattr(STDIN_FILENO, TCSAFLUSH, &tattr);
+}
+
+int main(int argc, const char *argv[])
+{
+  int fd = -1;
+  FILE *output = NULL, *input = NULL;
+  poptContext con;
+  int retval;
+  int view;
+  char c;
+  struct pollfd pollfds[2];
+
+  sys_sigint_handler = signal(SIGINT, sigint_handler);
+
+  con = poptGetContext(NULL, argc, argv, options, 0);
+  retval = poptGetNextOpt(con);
+  if (retval < -1) {
+    poptPrintUsage(con, stdout, 0);
+    return -1;
+  }
+
+  if (option_version) {
+    printf("dump tool for nosy sniffer, version %s\n", VERSION);
+    return 0;
+  }
+
+  if (__BYTE_ORDER != __LITTLE_ENDIAN)
+    fprintf(stderr, "warning: nosy has only been tested on little "
+	    "endian machines\n");
+
+  if (option_input != NULL) {
+    input = fopen(option_input, "r");
+    if (input == NULL) {
+      fprintf(stderr, "Could not open %s, %m\n", option_input);
+      return -1;
+    }
+  }
+  else {
+    fd = open(option_nosy_device, O_RDWR);
+    if (fd < 0) {
+      fprintf(stderr, "Could not open %s, %m\n", option_nosy_device);
+      return -1;
+    }
+    set_input_mode();
+  }
+
+  if (strcmp(option_view, "transaction") == 0)
+    view = VIEW_TRANSACTION;
+  else if (strcmp(option_view, "stats") == 0)
+    view = VIEW_STATS;
+  else
+    view = VIEW_PACKET;
+
+  if (option_output) {
+    output = fopen(option_output, "w");
+    if (output == NULL) {
+      fprintf(stderr, "Could not open %s, %m\n", option_output);
+      return -1;
+    }
+  }
+
+  setvbuf(stdout, NULL, _IOLBF, BUFSIZ);
+
+  if (1) {
+    unsigned long buf[128 * 1024];
+    unsigned int filter;
+    int length;
+
+    filter = ~0;
+    if (!option_iso)
+      filter &= ~(1 <<TCODE_ISO_DATA);
+    if (!option_cycle_start)
+      filter &= ~(1 << TCODE_CYCLE_START);
+
+    if (view == VIEW_STATS)
+      ioctl(fd, NOSY_IOC_FILTER, ~(1 << TCODE_CYCLE_START));
+    else
+      ioctl(fd, NOSY_IOC_FILTER, filter);
+
+    ioctl(fd, NOSY_IOC_START);
+
+    pollfds[0].fd = fd;
+    pollfds[0].events = POLLIN;
+    pollfds[1].fd = STDIN_FILENO;
+    pollfds[1].events = POLLIN;
+
+    while (run) {
+      if (input != NULL) {
+	if (fread(&length, sizeof length, 1, input) != 1)
+	  return 0;
+	fread(buf, 1, length, input);
+      }
+      else {
+	poll(pollfds, 2, -1);
+	if (pollfds[1].revents) {
+	  read(STDIN_FILENO, &c, sizeof c);
+	  switch (c) {
+	  case 'q':
+	    if (output != NULL)
+	      fclose(output);
+	    return 0;
+	  }
+	}
+
+	if (pollfds[0].revents)
+	  length = read(fd, buf, sizeof buf);
+	else
+	  continue;
+      }
+
+      if (output != NULL) {
+	fwrite(&length, sizeof length, 1, output);
+	fwrite(buf, 1, length, output);
+      }
+
+      switch (view) {
+      case VIEW_TRANSACTION:
+	handle_packet(buf, length);
+	break;
+      case VIEW_PACKET:
+	print_packet(buf, length);
+	break;
+      case VIEW_STATS:
+	print_stats(buf, length);
+	break;
+      }
+    }
+  }
+  else
+    poptPrintUsage(con, stdout, 0);
+
+  if (output != NULL)
+    fclose(output);
+
+  close(fd);
+
+  poptFreeContext(con);
+
+  return 0;
+}
diff --git a/tools/firewire/nosy-dump.h b/tools/firewire/nosy-dump.h
new file mode 100644
index 0000000..d8bcb61
--- /dev/null
+++ b/tools/firewire/nosy-dump.h
@@ -0,0 +1,292 @@
+#ifndef __nosy_dump_h__
+#define __nosy_dump_h__
+
+#define array_length(array) (sizeof(array) / sizeof(array[0]))
+
+#define TCODE_WRITE_QUADLET         0x0
+#define TCODE_WRITE_BLOCK           0x1
+#define TCODE_WRITE_RESPONSE        0x2
+#define TCODE_READ_QUADLET          0x4
+#define TCODE_READ_BLOCK            0x5
+#define TCODE_READ_QUADLET_RESPONSE 0x6
+#define TCODE_READ_BLOCK_RESPONSE   0x7
+#define TCODE_CYCLE_START           0x8
+#define TCODE_LOCK_REQUEST          0x9
+#define TCODE_ISO_DATA              0xa
+#define TCODE_LOCK_RESPONSE         0xb
+#define TCODE_PHY_PACKET            0x10
+
+#define ACK_NO_ACK               0x0
+#define ACK_COMPLETE             0x1
+#define ACK_PENDING              0x2
+#define ACK_BUSY_X               0x4
+#define ACK_BUSY_A               0x5
+#define ACK_BUSY_B               0x6
+#define ACK_DATA_ERROR           0xd
+#define ACK_TYPE_ERROR           0xe 
+
+#define ACK_DONE(a)  ((a >> 2) == 0)
+#define ACK_BUSY(a)  ((a >> 2) == 1)
+#define ACK_ERROR(a) ((a >> 2) == 3)
+
+#define SPEED_100                0x0
+#define SPEED_200                0x1
+#define SPEED_400                0x2
+
+struct phy_packet {
+  unsigned long timestamp;
+
+  union {
+    struct {
+      unsigned int zero : 24;
+      unsigned int phy_id : 6;
+      unsigned int identifier : 2;
+    } common, link_on;
+    struct {
+      unsigned int zero : 16;
+      unsigned int gap_count : 6;
+      unsigned int set_gap_count : 1;
+      unsigned int set_root : 1;
+      unsigned int root_id : 6;
+      unsigned int identifier : 2;
+    } phy_config;
+    struct {
+      unsigned int more_packets : 1;
+      unsigned int initiated_reset : 1;
+      unsigned int port2 : 2;
+      unsigned int port1 : 2;
+      unsigned int port0 : 2;
+      unsigned int power_class : 3;
+      unsigned int contender : 1;
+      unsigned int phy_delay : 2;
+      unsigned int phy_speed : 2;
+      unsigned int gap_count : 6;
+      unsigned int link_active : 1;
+      unsigned int extended : 1;
+      unsigned int phy_id : 6;
+      unsigned int identifier : 2;
+    } self_id;
+
+    struct {
+      unsigned int more_packets : 1;
+      unsigned int reserved1 : 1;
+      unsigned int porth : 2;
+      unsigned int portg : 2;
+      unsigned int portf : 2;
+      unsigned int porte : 2;
+      unsigned int portd : 2;
+      unsigned int portc : 2;
+      unsigned int portb : 2;
+      unsigned int porta : 2;
+      unsigned int reserved0 : 2;
+      unsigned int sequence : 3;
+      unsigned int extended : 1;
+      unsigned int phy_id : 6;
+      unsigned int identifier : 2;
+    } ext_self_id;
+  };
+
+  unsigned long inverted;
+  unsigned long ack;
+};
+
+#define PHY_PACKET_CONFIGURATION 0x00
+#define PHY_PACKET_LINK_ON 0x01
+#define PHY_PACKET_SELF_ID 0x02
+
+struct link_packet {
+  unsigned long timestamp;
+
+  union {
+    struct {
+      unsigned int priority : 4;
+      unsigned int tcode : 4;
+      unsigned int rt : 2;
+      unsigned int tlabel : 6;
+      unsigned int destination : 16;
+
+      unsigned int offset_high : 16;
+      unsigned int source : 16;
+
+      unsigned long offset_low;
+    } common;
+
+    struct {
+      unsigned int priority : 4;
+      unsigned int tcode : 4;
+      unsigned int rt : 2;
+      unsigned int tlabel : 6;
+      unsigned int destination : 16;
+
+      unsigned int offset_high : 16;
+      unsigned int source : 16;
+
+      unsigned long offset_low;
+
+      unsigned long crc;
+    } read_quadlet;
+
+    struct {
+      unsigned int priority : 4;
+      unsigned int tcode : 4;
+      unsigned int rt : 2;
+      unsigned int tlabel : 6;
+      unsigned int destination : 16;
+
+      unsigned int reserved0 : 12;
+      unsigned int rcode : 4;
+      unsigned int source : 16;
+
+      unsigned long reserved1;
+
+      unsigned long data;
+ 
+      unsigned long crc; 
+    } read_quadlet_response;
+
+    struct {
+      unsigned int priority : 4;
+      unsigned int tcode : 4;
+      unsigned int rt : 2;
+      unsigned int tlabel : 6;
+      unsigned int destination : 16;
+
+      unsigned int offset_high : 16;
+      unsigned int source : 16;
+
+      unsigned long offset_low;
+
+      unsigned int extended_tcode : 16;
+      unsigned int data_length : 16;
+
+      unsigned long crc;
+    } read_block;
+
+    struct {
+      unsigned int priority : 4;
+      unsigned int tcode : 4;
+      unsigned int rt : 2;
+      unsigned int tlabel : 6;
+      unsigned int destination : 16;
+
+      unsigned int reserved0 : 12;
+      unsigned int rcode : 4;
+      unsigned int source : 16;
+
+      unsigned long reserved1;
+
+      unsigned int extended_tcode : 16;
+      unsigned int data_length : 16;
+
+      unsigned long crc; 
+
+      unsigned long data[0];
+
+      /* crc and ack follows. */
+
+    } read_block_response;
+
+    struct {
+      unsigned int priority : 4;
+      unsigned int tcode : 4;
+      unsigned int rt : 2;
+      unsigned int tlabel : 6;
+      unsigned int destination : 16;
+
+      unsigned int offset_high : 16;
+      unsigned int source : 16;
+
+      unsigned long offset_low;
+
+      unsigned long data;
+ 
+      unsigned long crc; 
+
+    } write_quadlet;
+
+    struct {
+      unsigned int priority : 4;
+      unsigned int tcode : 4;
+      unsigned int rt : 2;
+      unsigned int tlabel : 6;
+      unsigned int destination : 16;
+
+      unsigned int offset_high : 16;
+      unsigned int source : 16;
+
+      unsigned int offset_low : 32;
+
+      unsigned int extended_tcode : 16;
+      unsigned int data_length : 16;
+ 
+      unsigned long crc; 
+      unsigned long data[0];
+
+      /* crc and ack follows. */
+
+    } write_block;
+
+    struct {
+      unsigned int priority : 4;
+      unsigned int tcode : 4;
+      unsigned int rt : 2;
+      unsigned int tlabel : 6;
+      unsigned int destination : 16;
+
+      unsigned int reserved0 : 12;
+      unsigned int rcode : 4;
+      unsigned int source : 16;
+
+      unsigned long reserved1;
+
+      unsigned long crc; 
+    } write_response;
+
+    struct {
+      unsigned int priority : 4;
+      unsigned int tcode : 4;
+      unsigned int rt : 2;
+      unsigned int tlabel : 6;
+      unsigned int destination : 16;
+
+      unsigned int offset_high : 16;
+      unsigned int source : 16;
+
+      unsigned long offset_low;
+
+      unsigned long data;
+
+      unsigned long crc; 
+    } cycle_start;
+
+    struct {
+      unsigned int sy : 4;
+      unsigned int tcode : 4;
+      unsigned int channel : 6;
+      unsigned int tag : 2;
+      unsigned int data_length : 16;
+
+      unsigned long crc;
+    } iso_data;
+
+  };
+
+};
+
+struct subaction {
+  unsigned long ack;
+  size_t length;
+  struct list link;
+  struct link_packet packet;
+};
+
+struct link_transaction {
+  int request_node, response_node, tlabel;
+  struct subaction *request, *response;
+  struct list request_list, response_list;
+  struct list link;
+};
+
+int decode_fcp(struct link_transaction *t);
+
+#endif /* __nosy_dump_h__ */