6 files changed, 447 insertions, 507 deletions

diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c
index 4eeaed57e21..8be720b278b 100644
--- a/drivers/firewire/core-cdev.c
+++ b/drivers/firewire/core-cdev.c
@@ -25,6 +25,7 @@
 #include <linux/firewire.h>
 #include <linux/firewire-cdev.h>
 #include <linux/idr.h>
+#include <linux/irqflags.h>
 #include <linux/jiffies.h>
 #include <linux/kernel.h>
 #include <linux/kref.h>
@@ -32,7 +33,6 @@
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/poll.h>
-#include <linux/preempt.h>
 #include <linux/sched.h>
 #include <linux/spinlock.h>
 #include <linux/string.h>
@@ -368,39 +368,56 @@ void fw_device_cdev_remove(struct fw_device *device)
 	for_each_client(device, wake_up_client);
 }
 
-static int ioctl_get_info(struct client *client, void *buffer)
+union ioctl_arg {
+	struct fw_cdev_get_info			get_info;
+	struct fw_cdev_send_request		send_request;
+	struct fw_cdev_allocate			allocate;
+	struct fw_cdev_deallocate		deallocate;
+	struct fw_cdev_send_response		send_response;
+	struct fw_cdev_initiate_bus_reset	initiate_bus_reset;
+	struct fw_cdev_add_descriptor		add_descriptor;
+	struct fw_cdev_remove_descriptor	remove_descriptor;
+	struct fw_cdev_create_iso_context	create_iso_context;
+	struct fw_cdev_queue_iso		queue_iso;
+	struct fw_cdev_start_iso		start_iso;
+	struct fw_cdev_stop_iso			stop_iso;
+	struct fw_cdev_get_cycle_timer		get_cycle_timer;
+	struct fw_cdev_allocate_iso_resource	allocate_iso_resource;
+	struct fw_cdev_send_stream_packet	send_stream_packet;
+	struct fw_cdev_get_cycle_timer2		get_cycle_timer2;
+};
+
+static int ioctl_get_info(struct client *client, union ioctl_arg *arg)
 {
-	struct fw_cdev_get_info *get_info = buffer;
+	struct fw_cdev_get_info *a = &arg->get_info;
 	struct fw_cdev_event_bus_reset bus_reset;
 	unsigned long ret = 0;
 
-	client->version = get_info->version;
-	get_info->version = FW_CDEV_VERSION;
-	get_info->card = client->device->card->index;
+	client->version = a->version;
+	a->version = FW_CDEV_VERSION;
+	a->card = client->device->card->index;
 
 	down_read(&fw_device_rwsem);
 
-	if (get_info->rom != 0) {
-		void __user *uptr = u64_to_uptr(get_info->rom);
-		size_t want = get_info->rom_length;
+	if (a->rom != 0) {
+		size_t want = a->rom_length;
 		size_t have = client->device->config_rom_length * 4;
 
-		ret = copy_to_user(uptr, client->device->config_rom,
-				   min(want, have));
+		ret = copy_to_user(u64_to_uptr(a->rom),
+				   client->device->config_rom, min(want, have));
 	}
-	get_info->rom_length = client->device->config_rom_length * 4;
+	a->rom_length = client->device->config_rom_length * 4;
 
 	up_read(&fw_device_rwsem);
 
 	if (ret != 0)
 		return -EFAULT;
 
-	client->bus_reset_closure = get_info->bus_reset_closure;
-	if (get_info->bus_reset != 0) {
-		void __user *uptr = u64_to_uptr(get_info->bus_reset);
-
+	client->bus_reset_closure = a->bus_reset_closure;
+	if (a->bus_reset != 0) {
 		fill_bus_reset_event(&bus_reset, client);
-		if (copy_to_user(uptr, &bus_reset, sizeof(bus_reset)))
+		if (copy_to_user(u64_to_uptr(a->bus_reset),
+				 &bus_reset, sizeof(bus_reset)))
 			return -EFAULT;
 	}
 
@@ -571,11 +588,9 @@ static int init_request(struct client *client,
 	return ret;
 }
 
-static int ioctl_send_request(struct client *client, void *buffer)
+static int ioctl_send_request(struct client *client, union ioctl_arg *arg)
 {
-	struct fw_cdev_send_request *request = buffer;
-
-	switch (request->tcode) {
+	switch (arg->send_request.tcode) {
 	case TCODE_WRITE_QUADLET_REQUEST:
 	case TCODE_WRITE_BLOCK_REQUEST:
 	case TCODE_READ_QUADLET_REQUEST:
@@ -592,7 +607,7 @@ static int ioctl_send_request(struct client *client, void *buffer)
 		return -EINVAL;
 	}
 
-	return init_request(client, request, client->device->node_id,
+	return init_request(client, &arg->send_request, client->device->node_id,
 			    client->device->max_speed);
 }
 
@@ -683,9 +698,9 @@ static void release_address_handler(struct client *client,
 	kfree(r);
 }
 
-static int ioctl_allocate(struct client *client, void *buffer)
+static int ioctl_allocate(struct client *client, union ioctl_arg *arg)
 {
-	struct fw_cdev_allocate *request = buffer;
+	struct fw_cdev_allocate *a = &arg->allocate;
 	struct address_handler_resource *r;
 	struct fw_address_region region;
 	int ret;
@@ -694,13 +709,13 @@ static int ioctl_allocate(struct client *client, void *buffer)
 	if (r == NULL)
 		return -ENOMEM;
 
-	region.start = request->offset;
-	region.end = request->offset + request->length;
-	r->handler.length = request->length;
+	region.start = a->offset;
+	region.end   = a->offset + a->length;
+	r->handler.length           = a->length;
 	r->handler.address_callback = handle_request;
-	r->handler.callback_data = r;
-	r->closure = request->closure;
-	r->client = client;
+	r->handler.callback_data    = r;
+	r->closure   = a->closure;
+	r->client    = client;
 
 	ret = fw_core_add_address_handler(&r->handler, &region);
 	if (ret < 0) {
@@ -714,27 +729,25 @@ static int ioctl_allocate(struct client *client, void *buffer)
 		release_address_handler(client, &r->resource);
 		return ret;
 	}
-	request->handle = r->resource.handle;
+	a->handle = r->resource.handle;
 
 	return 0;
 }
 
-static int ioctl_deallocate(struct client *client, void *buffer)
+static int ioctl_deallocate(struct client *client, union ioctl_arg *arg)
 {
-	struct fw_cdev_deallocate *request = buffer;
-
-	return release_client_resource(client, request->handle,
+	return release_client_resource(client, arg->deallocate.handle,
 				       release_address_handler, NULL);
 }
 
-static int ioctl_send_response(struct client *client, void *buffer)
+static int ioctl_send_response(struct client *client, union ioctl_arg *arg)
 {
-	struct fw_cdev_send_response *request = buffer;
+	struct fw_cdev_send_response *a = &arg->send_response;
 	struct client_resource *resource;
 	struct inbound_transaction_resource *r;
 	int ret = 0;
 
-	if (release_client_resource(client, request->handle,
+	if (release_client_resource(client, a->handle,
 				    release_request, &resource) < 0)
 		return -EINVAL;
 
@@ -743,28 +756,24 @@ static int ioctl_send_response(struct client *client, void *buffer)
 	if (is_fcp_request(r->request))
 		goto out;
 
-	if (request->length < r->length)
-		r->length = request->length;
-	if (copy_from_user(r->data, u64_to_uptr(request->data), r->length)) {
+	if (a->length < r->length)
+		r->length = a->length;
+	if (copy_from_user(r->data, u64_to_uptr(a->data), r->length)) {
 		ret = -EFAULT;
 		kfree(r->request);
 		goto out;
 	}
-	fw_send_response(client->device->card, r->request, request->rcode);
+	fw_send_response(client->device->card, r->request, a->rcode);
  out:
 	kfree(r);
 
 	return ret;
 }
 
-static int ioctl_initiate_bus_reset(struct client *client, void *buffer)
+static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg)
 {
-	struct fw_cdev_initiate_bus_reset *request = buffer;
-	int short_reset;
-
-	short_reset = (request->type == FW_CDEV_SHORT_RESET);
-
-	return fw_core_initiate_bus_reset(client->device->card, short_reset);
+	return fw_core_initiate_bus_reset(client->device->card,
+			arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET);
 }
 
 static void release_descriptor(struct client *client,
@@ -777,9 +786,9 @@ static void release_descriptor(struct client *client,
 	kfree(r);
 }
 
-static int ioctl_add_descriptor(struct client *client, void *buffer)
+static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg)
 {
-	struct fw_cdev_add_descriptor *request = buffer;
+	struct fw_cdev_add_descriptor *a = &arg->add_descriptor;
 	struct descriptor_resource *r;
 	int ret;
 
@@ -787,22 +796,21 @@ static int ioctl_add_descriptor(struct client *client, void *buffer)
 	if (!client->device->is_local)
 		return -ENOSYS;
 
-	if (request->length > 256)
+	if (a->length > 256)
 		return -EINVAL;
 
-	r = kmalloc(sizeof(*r) + request->length * 4, GFP_KERNEL);
+	r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL);
 	if (r == NULL)
 		return -ENOMEM;
 
-	if (copy_from_user(r->data,
-			   u64_to_uptr(request->data), request->length * 4)) {
+	if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) {
 		ret = -EFAULT;
 		goto failed;
 	}
 
-	r->descriptor.length    = request->length;
-	r->descriptor.immediate = request->immediate;
-	r->descriptor.key       = request->key;
+	r->descriptor.length    = a->length;
+	r->descriptor.immediate = a->immediate;
+	r->descriptor.key       = a->key;
 	r->descriptor.data      = r->data;
 
 	ret = fw_core_add_descriptor(&r->descriptor);
@@ -815,7 +823,7 @@ static int ioctl_add_descriptor(struct client *client, void *buffer)
 		fw_core_remove_descriptor(&r->descriptor);
 		goto failed;
 	}
-	request->handle = r->resource.handle;
+	a->handle = r->resource.handle;
 
 	return 0;
  failed:
@@ -824,11 +832,9 @@ static int ioctl_add_descriptor(struct client *client, void *buffer)
 	return ret;
 }
 
-static int ioctl_remove_descriptor(struct client *client, void *buffer)
+static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg)
 {
-	struct fw_cdev_remove_descriptor *request = buffer;
-
-	return release_client_resource(client, request->handle,
+	return release_client_resource(client, arg->remove_descriptor.handle,
 				       release_descriptor, NULL);
 }
 
@@ -851,49 +857,44 @@ static void iso_callback(struct fw_iso_context *context, u32 cycle,
 		    sizeof(e->interrupt) + header_length, NULL, 0);
 }
 
-static int ioctl_create_iso_context(struct client *client, void *buffer)
+static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg)
 {
-	struct fw_cdev_create_iso_context *request = buffer;
+	struct fw_cdev_create_iso_context *a = &arg->create_iso_context;
 	struct fw_iso_context *context;
 
 	/* We only support one context at this time. */
 	if (client->iso_context != NULL)
 		return -EBUSY;
 
-	if (request->channel > 63)
+	if (a->channel > 63)
 		return -EINVAL;
 
-	switch (request->type) {
+	switch (a->type) {
 	case FW_ISO_CONTEXT_RECEIVE:
-		if (request->header_size < 4 || (request->header_size & 3))
+		if (a->header_size < 4 || (a->header_size & 3))
 			return -EINVAL;
-
 		break;
 
 	case FW_ISO_CONTEXT_TRANSMIT:
-		if (request->speed > SCODE_3200)
+		if (a->speed > SCODE_3200)
 			return -EINVAL;
-
 		break;
 
 	default:
 		return -EINVAL;
 	}
 
-	context =  fw_iso_context_create(client->device->card,
-					 request->type,
-					 request->channel,
-					 request->speed,
-					 request->header_size,
-					 iso_callback, client);
+	context = fw_iso_context_create(client->device->card, a->type,
+					a->channel, a->speed, a->header_size,
+					iso_callback, client);
 	if (IS_ERR(context))
 		return PTR_ERR(context);
 
-	client->iso_closure = request->closure;
+	client->iso_closure = a->closure;
 	client->iso_context = context;
 
 	/* We only support one context at this time. */
-	request->handle = 0;
+	a->handle = 0;
 
 	return 0;
 }
@@ -906,9 +907,9 @@ static int ioctl_create_iso_context(struct client *client, void *buffer)
 #define GET_SY(v)		(((v) >> 20) & 0x0f)
 #define GET_HEADER_LENGTH(v)	(((v) >> 24) & 0xff)
 
-static int ioctl_queue_iso(struct client *client, void *buffer)
+static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg)
 {
-	struct fw_cdev_queue_iso *request = buffer;
+	struct fw_cdev_queue_iso *a = &arg->queue_iso;
 	struct fw_cdev_iso_packet __user *p, *end, *next;
 	struct fw_iso_context *ctx = client->iso_context;
 	unsigned long payload, buffer_end, header_length;
@@ -919,7 +920,7 @@ static int ioctl_queue_iso(struct client *client, void *buffer)
 		u8 header[256];
 	} u;
 
-	if (ctx == NULL || request->handle != 0)
+	if (ctx == NULL || a->handle != 0)
 		return -EINVAL;
 
 	/*
@@ -929,23 +930,23 @@ static int ioctl_queue_iso(struct client *client, void *buffer)
 	 * set them both to 0, which will still let packets with
 	 * payload_length == 0 through.  In other words, if no packets
 	 * use the indirect payload, the iso buffer need not be mapped
-	 * and the request->data pointer is ignored.
+	 * and the a->data pointer is ignored.
 	 */
 
-	payload = (unsigned long)request->data - client->vm_start;
+	payload = (unsigned long)a->data - client->vm_start;
 	buffer_end = client->buffer.page_count << PAGE_SHIFT;
-	if (request->data == 0 || client->buffer.pages == NULL ||
+	if (a->data == 0 || client->buffer.pages == NULL ||
 	    payload >= buffer_end) {
 		payload = 0;
 		buffer_end = 0;
 	}
 
-	p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request->packets);
+	p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets);
 
-	if (!access_ok(VERIFY_READ, p, request->size))
+	if (!access_ok(VERIFY_READ, p, a->size))
 		return -EFAULT;
 
-	end = (void __user *)p + request->size;
+	end = (void __user *)p + a->size;
 	count = 0;
 	while (p < end) {
 		if (get_user(control, &p->control))
@@ -995,61 +996,78 @@ static int ioctl_queue_iso(struct client *client, void *buffer)
 		count++;
 	}
 
-	request->size    -= uptr_to_u64(p) - request->packets;
-	request->packets  = uptr_to_u64(p);
-	request->data     = client->vm_start + payload;
+	a->size    -= uptr_to_u64(p) - a->packets;
+	a->packets  = uptr_to_u64(p);
+	a->data     = client->vm_start + payload;
 
 	return count;
 }
 
-static int ioctl_start_iso(struct client *client, void *buffer)
+static int ioctl_start_iso(struct client *client, union ioctl_arg *arg)
 {
-	struct fw_cdev_start_iso *request = buffer;
+	struct fw_cdev_start_iso *a = &arg->start_iso;
 
-	if (client->iso_context == NULL || request->handle != 0)
+	if (client->iso_context == NULL || a->handle != 0)
 		return -EINVAL;
 
-	if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) {
-		if (request->tags == 0 || request->tags > 15)
-			return -EINVAL;
-
-		if (request->sync > 15)
-			return -EINVAL;
-	}
+	if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE &&
+	    (a->tags == 0 || a->tags > 15 || a->sync > 15))
+		return -EINVAL;
 
-	return fw_iso_context_start(client->iso_context, request->cycle,
-				    request->sync, request->tags);
+	return fw_iso_context_start(client->iso_context,
+				    a->cycle, a->sync, a->tags);
 }
 
-static int ioctl_stop_iso(struct client *client, void *buffer)
+static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg)
 {
-	struct fw_cdev_stop_iso *request = buffer;
+	struct fw_cdev_stop_iso *a = &arg->stop_iso;
 
-	if (client->iso_context == NULL || request->handle != 0)
+	if (client->iso_context == NULL || a->handle != 0)
 		return -EINVAL;
 
 	return fw_iso_context_stop(client->iso_context);
 }
 
-static int ioctl_get_cycle_timer(struct client *client, void *buffer)
+static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg)
 {
-	struct fw_cdev_get_cycle_timer *request = buffer;
+	struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2;
 	struct fw_card *card = client->device->card;
-	unsigned long long bus_time;
-	struct timeval tv;
-	unsigned long flags;
+	struct timespec ts = {0, 0};
+	u32 cycle_time;
+	int ret = 0;
+
+	local_irq_disable();
+
+	cycle_time = card->driver->get_cycle_time(card);
 
-	preempt_disable();
-	local_irq_save(flags);
+	switch (a->clk_id) {
+	case CLOCK_REALTIME:      getnstimeofday(&ts);                   break;
+	case CLOCK_MONOTONIC:     do_posix_clock_monotonic_gettime(&ts); break;
+	case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts);                  break;
+	default:
+		ret = -EINVAL;
+	}
 
-	bus_time = card->driver->get_bus_time(card);
-	do_gettimeofday(&tv);
+	local_irq_enable();
 
-	local_irq_restore(flags);
-	preempt_enable();
+	a->tv_sec      = ts.tv_sec;
+	a->tv_nsec     = ts.tv_nsec;
+	a->cycle_timer = cycle_time;
+
+	return ret;
+}
+
+static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg)
+{
+	struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer;
+	struct fw_cdev_get_cycle_timer2 ct2;
+
+	ct2.clk_id = CLOCK_REALTIME;
+	ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2);
+
+	a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC;
+	a->cycle_timer = ct2.cycle_timer;
 
-	request->local_time = tv.tv_sec * 1000000ULL + tv.tv_usec;
-	request->cycle_timer = bus_time & 0xffffffff;
 	return 0;
 }
 
@@ -1220,33 +1238,32 @@ static int init_iso_resource(struct client *client,
 	return ret;
 }
 
-static int ioctl_allocate_iso_resource(struct client *client, void *buffer)
+static int ioctl_allocate_iso_resource(struct client *client,
+				       union ioctl_arg *arg)
 {
-	struct fw_cdev_allocate_iso_resource *request = buffer;
-
-	return init_iso_resource(client, request, ISO_RES_ALLOC);
+	return init_iso_resource(client,
+			&arg->allocate_iso_resource, ISO_RES_ALLOC);
 }
 
-static int ioctl_deallocate_iso_resource(struct client *client, void *buffer)
+static int ioctl_deallocate_iso_resource(struct client *client,
+					 union ioctl_arg *arg)
 {
-	struct fw_cdev_deallocate *request = buffer;
-
-	return release_client_resource(client, request->handle,
-				       release_iso_resource, NULL);
+	return release_client_resource(client,
+			arg->deallocate.handle, release_iso_resource, NULL);
 }
 
-static int ioctl_allocate_iso_resource_once(struct client *client, void *buffer)
+static int ioctl_allocate_iso_resource_once(struct client *client,
+					    union ioctl_arg *arg)
 {
-	struct fw_cdev_allocate_iso_resource *request = buffer;
-
-	return init_iso_resource(client, request, ISO_RES_ALLOC_ONCE);
+	return init_iso_resource(client,
+			&arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE);
 }
 
-static int ioctl_deallocate_iso_resource_once(struct client *client, void *buffer)
+static int ioctl_deallocate_iso_resource_once(struct client *client,
+					      union ioctl_arg *arg)
 {
-	struct fw_cdev_allocate_iso_resource *request = buffer;
-
-	return init_iso_resource(client, request, ISO_RES_DEALLOC_ONCE);
+	return init_iso_resource(client,
+			&arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE);
 }
 
 /*
@@ -1254,16 +1271,17 @@ static int ioctl_deallocate_iso_resource_once(struct client *client, void *buffe
  * limited by the device's link speed, the local node's link speed,
  * and all PHY port speeds between the two links.
  */
-static int ioctl_get_speed(struct client *client, void *buffer)
+static int ioctl_get_speed(struct client *client, union ioctl_arg *arg)
 {
 	return client->device->max_speed;
 }
 
-static int ioctl_send_broadcast_request(struct client *client, void *buffer)
+static int ioctl_send_broadcast_request(struct client *client,
+					union ioctl_arg *arg)
 {
-	struct fw_cdev_send_request *request = buffer;
+	struct fw_cdev_send_request *a = &arg->send_request;
 
-	switch (request->tcode) {
+	switch (a->tcode) {
 	case TCODE_WRITE_QUADLET_REQUEST:
 	case TCODE_WRITE_BLOCK_REQUEST:
 		break;
@@ -1272,36 +1290,36 @@ static int ioctl_send_broadcast_request(struct client *client, void *buffer)
 	}
 
 	/* Security policy: Only allow accesses to Units Space. */
-	if (request->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END)
+	if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END)
 		return -EACCES;
 
-	return init_request(client, request, LOCAL_BUS | 0x3f, SCODE_100);
+	return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100);
 }
 
-static int ioctl_send_stream_packet(struct client *client, void *buffer)
+static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg)
 {
-	struct fw_cdev_send_stream_packet *p = buffer;
+	struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet;
 	struct fw_cdev_send_request request;
 	int dest;
 
-	if (p->speed > client->device->card->link_speed ||
-	    p->length > 1024 << p->speed)
+	if (a->speed > client->device->card->link_speed ||
+	    a->length > 1024 << a->speed)
 		return -EIO;
 
-	if (p->tag > 3 || p->channel > 63 || p->sy > 15)
+	if (a->tag > 3 || a->channel > 63 || a->sy > 15)
 		return -EINVAL;
 
-	dest = fw_stream_packet_destination_id(p->tag, p->channel, p->sy);
+	dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy);
 	request.tcode		= TCODE_STREAM_DATA;
-	request.length		= p->length;
-	request.closure		= p->closure;
-	request.data		= p->data;
-	request.generation	= p->generation;
+	request.length		= a->length;
+	request.closure		= a->closure;
+	request.data		= a->data;
+	request.generation	= a->generation;
 
-	return init_request(client, &request, dest, p->speed);
+	return init_request(client, &request, dest, a->speed);
 }
 
-static int (* const ioctl_handlers[])(struct client *client, void *buffer) = {
+static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = {
 	ioctl_get_info,
 	ioctl_send_request,
 	ioctl_allocate,
@@ -1322,47 +1340,35 @@ static int (* const ioctl_handlers[])(struct client *client, void *buffer) = {
 	ioctl_get_speed,
 	ioctl_send_broadcast_request,
 	ioctl_send_stream_packet,
+	ioctl_get_cycle_timer2,
 };
 
 static int dispatch_ioctl(struct client *client,
 			  unsigned int cmd, void __user *arg)
 {
-	char buffer[sizeof(union {
-		struct fw_cdev_get_info			_00;
-		struct fw_cdev_send_request		_01;
-		struct fw_cdev_allocate			_02;
-		struct fw_cdev_deallocate		_03;
-		struct fw_cdev_send_response		_04;
-		struct fw_cdev_initiate_bus_reset	_05;
-		struct fw_cdev_add_descriptor		_06;
-		struct fw_cdev_remove_descriptor	_07;
-		struct fw_cdev_create_iso_context	_08;
-		struct fw_cdev_queue_iso		_09;
-		struct fw_cdev_start_iso		_0a;
-		struct fw_cdev_stop_iso			_0b;
-		struct fw_cdev_get_cycle_timer		_0c;
-		struct fw_cdev_allocate_iso_resource	_0d;
-		struct fw_cdev_send_stream_packet	_13;
-	})];
+	union ioctl_arg buffer;
 	int ret;
 
+	if (fw_device_is_shutdown(client->device))
+		return -ENODEV;
+
 	if (_IOC_TYPE(cmd) != '#' ||
 	    _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers))
 		return -EINVAL;
 
 	if (_IOC_DIR(cmd) & _IOC_WRITE) {
 		if (_IOC_SIZE(cmd) > sizeof(buffer) ||
-		    copy_from_user(buffer, arg, _IOC_SIZE(cmd)))
+		    copy_from_user(&buffer, arg, _IOC_SIZE(cmd)))
 			return -EFAULT;
 	}
 
-	ret = ioctl_handlers[_IOC_NR(cmd)](client, buffer);
+	ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer);
 	if (ret < 0)
 		return ret;
 
 	if (_IOC_DIR(cmd) & _IOC_READ) {
 		if (_IOC_SIZE(cmd) > sizeof(buffer) ||
-		    copy_to_user(arg, buffer, _IOC_SIZE(cmd)))
+		    copy_to_user(arg, &buffer, _IOC_SIZE(cmd)))
 			return -EFAULT;
 	}
 
@@ -1372,24 +1378,14 @@ static int dispatch_ioctl(struct client *client,
 static long fw_device_op_ioctl(struct file *file,
 			       unsigned int cmd, unsigned long arg)
 {
-	struct client *client = file->private_data;
-
-	if (fw_device_is_shutdown(client->device))
-		return -ENODEV;
-
-	return dispatch_ioctl(client, cmd, (void __user *) arg);
+	return dispatch_ioctl(file->private_data, cmd, (void __user *)arg);
 }
 
 #ifdef CONFIG_COMPAT
 static long fw_device_op_compat_ioctl(struct file *file,
 				      unsigned int cmd, unsigned long arg)
 {
-	struct client *client = file->private_data;
-
-	if (fw_device_is_shutdown(client->device))
-		return -ENODEV;
-
-	return dispatch_ioctl(client, cmd, compat_ptr(arg));
+	return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg));
 }
 #endif
 
diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c
index 9d0dfcbe2c1..014cabd3afd 100644
--- a/drivers/firewire/core-device.c
+++ b/drivers/firewire/core-device.c
@@ -18,6 +18,7 @@
  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  */
 
+#include <linux/bug.h>
 #include <linux/ctype.h>
 #include <linux/delay.h>
 #include <linux/device.h>
@@ -43,7 +44,7 @@
 
 #include "core.h"
 
-void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 * p)
+void fw_csr_iterator_init(struct fw_csr_iterator *ci, const u32 *p)
 {
 	ci->p = p + 1;
 	ci->end = ci->p + (p[0] >> 16);
@@ -59,9 +60,76 @@ int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value)
 }
 EXPORT_SYMBOL(fw_csr_iterator_next);
 
+static const u32 *search_leaf(const u32 *directory, int search_key)
+{
+	struct fw_csr_iterator ci;
+	int last_key = 0, key, value;
+
+	fw_csr_iterator_init(&ci, directory);
+	while (fw_csr_iterator_next(&ci, &key, &value)) {
+		if (last_key == search_key &&
+		    key == (CSR_DESCRIPTOR | CSR_LEAF))
+			return ci.p - 1 + value;
+
+		last_key = key;
+	}
+
+	return NULL;
+}
+
+static int textual_leaf_to_string(const u32 *block, char *buf, size_t size)
+{
+	unsigned int quadlets, i;
+	char c;
+
+	if (!size || !buf)
+		return -EINVAL;
+
+	quadlets = min(block[0] >> 16, 256U);
+	if (quadlets < 2)
+		return -ENODATA;
+
+	if (block[1] != 0 || block[2] != 0)
+		/* unknown language/character set */
+		return -ENODATA;
+
+	block += 3;
+	quadlets -= 2;
+	for (i = 0; i < quadlets * 4 && i < size - 1; i++) {
+		c = block[i / 4] >> (24 - 8 * (i % 4));
+		if (c == '\0')
+			break;
+		buf[i] = c;
+	}
+	buf[i] = '\0';
+
+	return i;
+}
+
+/**
+ * fw_csr_string - reads a string from the configuration ROM
+ * @directory: e.g. root directory or unit directory
+ * @key: the key of the preceding directory entry
+ * @buf: where to put the string
+ * @size: size of @buf, in bytes
+ *
+ * The string is taken from a minimal ASCII text descriptor leaf after
+ * the immediate entry with @key.  The string is zero-terminated.
+ * Returns strlen(buf) or a negative error code.
+ */
+int fw_csr_string(const u32 *directory, int key, char *buf, size_t size)
+{
+	const u32 *leaf = search_leaf(directory, key);
+	if (!leaf)
+		return -ENOENT;
+
+	return textual_leaf_to_string(leaf, buf, size);
+}
+EXPORT_SYMBOL(fw_csr_string);
+
 static bool is_fw_unit(struct device *dev);
 
-static int match_unit_directory(u32 *directory, u32 match_flags,
+static int match_unit_directory(const u32 *directory, u32 match_flags,
 				const struct ieee1394_device_id *id)
 {
 	struct fw_csr_iterator ci;
@@ -195,7 +263,7 @@ static ssize_t show_immediate(struct device *dev,
 	struct config_rom_attribute *attr =
 		container_of(dattr, struct config_rom_attribute, attr);
 	struct fw_csr_iterator ci;
-	u32 *dir;
+	const u32 *dir;
 	int key, value, ret = -ENOENT;
 
 	down_read(&fw_device_rwsem);
@@ -226,10 +294,10 @@ static ssize_t show_text_leaf(struct device *dev,
 {
 	struct config_rom_attribute *attr =
 		container_of(dattr, struct config_rom_attribute, attr);
-	struct fw_csr_iterator ci;
-	u32 *dir, *block = NULL, *p, *end;
-	int length, key, value, last_key = 0, ret = -ENOENT;
-	char *b;
+	const u32 *dir;
+	size_t bufsize;
+	char dummy_buf[2];
+	int ret;
 
 	down_read(&fw_device_rwsem);
 
@@ -238,40 +306,23 @@ static ssize_t show_text_leaf(struct device *dev,
 	else
 		dir = fw_device(dev)->config_rom + 5;
 
-	fw_csr_iterator_init(&ci, dir);
-	while (fw_csr_iterator_next(&ci, &key, &value)) {
-		if (attr->key == last_key &&
-		    key == (CSR_DESCRIPTOR | CSR_LEAF))
-			block = ci.p - 1 + value;
-		last_key = key;
+	if (buf) {
+		bufsize = PAGE_SIZE - 1;
+	} else {
+		buf = dummy_buf;
+		bufsize = 1;
 	}
 
-	if (block == NULL)
-		goto out;
-
-	length = min(block[0] >> 16, 256U);
-	if (length < 3)
-		goto out;
-
-	if (block[1] != 0 || block[2] != 0)
-		/* Unknown encoding. */
-		goto out;
+	ret = fw_csr_string(dir, attr->key, buf, bufsize);
 
-	if (buf == NULL) {
-		ret = length * 4;
-		goto out;
+	if (ret >= 0) {
+		/* Strip trailing whitespace and add newline. */
+		while (ret > 0 && isspace(buf[ret - 1]))
+			ret--;
+		strcpy(buf + ret, "\n");
+		ret++;
 	}
 
-	b = buf;
-	end = &block[length + 1];
-	for (p = &block[3]; p < end; p++, b += 4)
-		* (u32 *) b = (__force u32) __cpu_to_be32(*p);
-
-	/* Strip trailing whitespace and add newline. */
-	while (b--, (isspace(*b) || *b == '\0') && b > buf);
-	strcpy(b + 1, "\n");
-	ret = b + 2 - buf;
- out:
 	up_read(&fw_device_rwsem);
 
 	return ret;
@@ -371,7 +422,7 @@ static ssize_t guid_show(struct device *dev,
 	return ret;
 }
 
-static int units_sprintf(char *buf, u32 *directory)
+static int units_sprintf(char *buf, const u32 *directory)
 {
 	struct fw_csr_iterator ci;
 	int key, value;
@@ -441,28 +492,29 @@ static int read_rom(struct fw_device *device,
 	return rcode;
 }
 
-#define READ_BIB_ROM_SIZE	256
-#define READ_BIB_STACK_SIZE	16
+#define MAX_CONFIG_ROM_SIZE 256
 
 /*
  * Read the bus info block, perform a speed probe, and read all of the rest of
  * the config ROM.  We do all this with a cached bus generation.  If the bus
- * generation changes under us, read_bus_info_block will fail and get retried.
+ * generation changes under us, read_config_rom will fail and get retried.
  * It's better to start all over in this case because the node from which we
  * are reading the ROM may have changed the ROM during the reset.
  */
-static int read_bus_info_block(struct fw_device *device, int generation)
+static int read_config_rom(struct fw_device *device, int generation)
 {
-	u32 *rom, *stack, *old_rom, *new_rom;
+	const u32 *old_rom, *new_rom;
+	u32 *rom, *stack;
 	u32 sp, key;
 	int i, end, length, ret = -1;
 
-	rom = kmalloc(sizeof(*rom) * READ_BIB_ROM_SIZE +
-		      sizeof(*stack) * READ_BIB_STACK_SIZE, GFP_KERNEL);
+	rom = kmalloc(sizeof(*rom) * MAX_CONFIG_ROM_SIZE +
+		      sizeof(*stack) * MAX_CONFIG_ROM_SIZE, GFP_KERNEL);
 	if (rom == NULL)
 		return -ENOMEM;
 
-	stack = &rom[READ_BIB_ROM_SIZE];
+	stack = &rom[MAX_CONFIG_ROM_SIZE];
+	memset(rom, 0, sizeof(*rom) * MAX_CONFIG_ROM_SIZE);
 
 	device->max_speed = SCODE_100;
 
@@ -529,40 +581,54 @@ static int read_bus_info_block(struct fw_device *device, int generation)
 		 */
 		key = stack[--sp];
 		i = key & 0xffffff;
-		if (i >= READ_BIB_ROM_SIZE)
-			/*
-			 * The reference points outside the standard
-			 * config rom area, something's fishy.
-			 */
+		if (WARN_ON(i >= MAX_CONFIG_ROM_SIZE))
 			goto out;
 
 		/* Read header quadlet for the block to get the length. */
 		if (read_rom(device, generation, i, &rom[i]) != RCODE_COMPLETE)
 			goto out;
 		end = i + (rom[i] >> 16) + 1;
-		i++;
-		if (end > READ_BIB_ROM_SIZE)
+		if (end > MAX_CONFIG_ROM_SIZE) {
 			/*
-			 * This block extends outside standard config
-			 * area (and the array we're reading it
-			 * into).  That's broken, so ignore this
-			 * device.
+			 * This block extends outside the config ROM which is
+			 * a firmware bug.  Ignore this whole block, i.e.
+			 * simply set a fake block length of 0.
 			 */
-			goto out;
+			fw_error("skipped invalid ROM block %x at %llx\n",
+				 rom[i],
+				 i * 4 | CSR_REGISTER_BASE | CSR_CONFIG_ROM);
+			rom[i] = 0;
+			end = i;
+		}
+		i++;
 
 		/*
 		 * Now read in the block.  If this is a directory
 		 * block, check the entries as we read them to see if
 		 * it references another block, and push it in that case.
 		 */
-		while (i < end) {
+		for (; i < end; i++) {
 			if (read_rom(device, generation, i, &rom[i]) !=
 			    RCODE_COMPLETE)
 				goto out;
-			if ((key >> 30) == 3 && (rom[i] >> 30) > 1 &&
-			    sp < READ_BIB_STACK_SIZE)
-				stack[sp++] = i + rom[i];
-			i++;
+
+			if ((key >> 30) != 3 || (rom[i] >> 30) < 2)
+				continue;
+			/*
+			 * Offset points outside the ROM.  May be a firmware
+			 * bug or an Extended ROM entry (IEEE 1212-2001 clause
+			 * 7.7.18).  Simply overwrite this pointer here by a
+			 * fake immediate entry so that later iterators over
+			 * the ROM don't have to check offsets all the time.
+			 */
+			if (i + (rom[i] & 0xffffff) >= MAX_CONFIG_ROM_SIZE) {
+				fw_error("skipped unsupported ROM entry %x at %llx\n",
+					 rom[i],
+					 i * 4 | CSR_REGISTER_BASE | CSR_CONFIG_ROM);
+				rom[i] = 0;
+				continue;
+			}
+			stack[sp++] = i + rom[i];
 		}
 		if (length < i)
 			length = i;
@@ -905,7 +971,7 @@ static void fw_device_init(struct work_struct *work)
 	 * device.
 	 */
 
-	if (read_bus_info_block(device, device->generation) < 0) {
+	if (read_config_rom(device, device->generation) < 0) {
 		if (device->config_rom_retries < MAX_RETRIES &&
 		    atomic_read(&device->state) == FW_DEVICE_INITIALIZING) {
 			device->config_rom_retries++;
@@ -1022,7 +1088,7 @@ enum {
 };
 
 /* Reread and compare bus info block and header of root directory */
-static int reread_bus_info_block(struct fw_device *device, int generation)
+static int reread_config_rom(struct fw_device *device, int generation)
 {
 	u32 q;
 	int i;
@@ -1048,7 +1114,7 @@ static void fw_device_refresh(struct work_struct *work)
 	struct fw_card *card = device->card;
 	int node_id = device->node_id;
 
-	switch (reread_bus_info_block(device, device->generation)) {
+	switch (reread_config_rom(device, device->generation)) {
 	case REREAD_BIB_ERROR:
 		if (device->config_rom_retries < MAX_RETRIES / 2 &&
 		    atomic_read(&device->state) == FW_DEVICE_INITIALIZING) {
@@ -1082,7 +1148,7 @@ static void fw_device_refresh(struct work_struct *work)
 	 */
 	device_for_each_child(&device->device, NULL, shutdown_unit);
 
-	if (read_bus_info_block(device, device->generation) < 0) {
+	if (read_config_rom(device, device->generation) < 0) {
 		if (device->config_rom_retries < MAX_RETRIES &&
 		    atomic_read(&device->state) == FW_DEVICE_INITIALIZING) {
 			device->config_rom_retries++;
diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c
index 495849eb13c..673b03f8b4e 100644
--- a/drivers/firewire/core-transaction.c
+++ b/drivers/firewire/core-transaction.c
@@ -921,23 +921,15 @@ static void handle_registers(struct fw_card *card, struct fw_request *request,
 		void *payload, size_t length, void *callback_data)
 {
 	int reg = offset & ~CSR_REGISTER_BASE;
-	unsigned long long bus_time;
 	__be32 *data = payload;
 	int rcode = RCODE_COMPLETE;
 
 	switch (reg) {
 	case CSR_CYCLE_TIME:
-	case CSR_BUS_TIME:
-		if (!TCODE_IS_READ_REQUEST(tcode) || length != 4) {
-			rcode = RCODE_TYPE_ERROR;
-			break;
-		}
-
-		bus_time = card->driver->get_bus_time(card);
-		if (reg == CSR_CYCLE_TIME)
-			*data = cpu_to_be32(bus_time);
+		if (TCODE_IS_READ_REQUEST(tcode) && length == 4)
+			*data = cpu_to_be32(card->driver->get_cycle_time(card));
 		else
-			*data = cpu_to_be32(bus_time >> 25);
+			rcode = RCODE_TYPE_ERROR;
 		break;
 
 	case CSR_BROADCAST_CHANNEL:
@@ -968,6 +960,9 @@ static void handle_registers(struct fw_card *card, struct fw_request *request,
 	case CSR_BUSY_TIMEOUT:
 		/* FIXME: Implement this. */
 
+	case CSR_BUS_TIME:
+		/* Useless without initialization by the bus manager. */
+
 	default:
 		rcode = RCODE_ADDRESS_ERROR;
 		break;
diff --git a/drivers/firewire/core.h b/drivers/firewire/core.h
index ed3b1a765c0..fb0321300cc 100644
--- a/drivers/firewire/core.h
+++ b/drivers/firewire/core.h
@@ -70,7 +70,7 @@ struct fw_card_driver {
 	int (*enable_phys_dma)(struct fw_card *card,
 			       int node_id, int generation);
 
-	u64 (*get_bus_time)(struct fw_card *card);
+	u32 (*get_cycle_time)(struct fw_card *card);
 
 	struct fw_iso_context *
 	(*allocate_iso_context)(struct fw_card *card,
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 43ebf337b13..75dc6988cff 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -38,7 +38,6 @@
 #include <linux/spinlock.h>
 #include <linux/string.h>
 
-#include <asm/atomic.h>
 #include <asm/byteorder.h>
 #include <asm/page.h>
 #include <asm/system.h>
@@ -73,20 +72,6 @@ struct descriptor {
 	__le16 transfer_status;
 } __attribute__((aligned(16)));
 
-struct db_descriptor {
-	__le16 first_size;
-	__le16 control;
-	__le16 second_req_count;
-	__le16 first_req_count;
-	__le32 branch_address;
-	__le16 second_res_count;
-	__le16 first_res_count;
-	__le32 reserved0;
-	__le32 first_buffer;
-	__le32 second_buffer;
-	__le32 reserved1;
-} __attribute__((aligned(16)));
-
 #define CONTROL_SET(regs)	(regs)
 #define CONTROL_CLEAR(regs)	((regs) + 4)
 #define COMMAND_PTR(regs)	((regs) + 12)
@@ -181,31 +166,16 @@ struct fw_ohci {
 	struct fw_card card;
 
 	__iomem char *registers;
-	dma_addr_t self_id_bus;
-	__le32 *self_id_cpu;
-	struct tasklet_struct bus_reset_tasklet;
 	int node_id;
 	int generation;
 	int request_generation;	/* for timestamping incoming requests */
-	atomic_t bus_seconds;
-
-	bool use_dualbuffer;
-	bool old_uninorth;
-	bool bus_reset_packet_quirk;
+	unsigned quirks;
 
 	/*
 	 * Spinlock for accessing fw_ohci data.  Never call out of
 	 * this driver with this lock held.
 	 */
 	spinlock_t lock;
-	u32 self_id_buffer[512];
-
-	/* Config rom buffers */
-	__be32 *config_rom;
-	dma_addr_t config_rom_bus;
-	__be32 *next_config_rom;
-	dma_addr_t next_config_rom_bus;
-	__be32 next_header;
 
 	struct ar_context ar_request_ctx;
 	struct ar_context ar_response_ctx;
@@ -217,6 +187,18 @@ struct fw_ohci {
 	u64 ir_context_channels;
 	u32 ir_context_mask;
 	struct iso_context *ir_context_list;
+
+	__be32    *config_rom;
+	dma_addr_t config_rom_bus;
+	__be32    *next_config_rom;
+	dma_addr_t next_config_rom_bus;
+	__be32     next_header;
+
+	__le32    *self_id_cpu;
+	dma_addr_t self_id_bus;
+	struct tasklet_struct bus_reset_tasklet;
+
+	u32 self_id_buffer[512];
 };
 
 static inline struct fw_ohci *fw_ohci(struct fw_card *card)
@@ -249,6 +231,30 @@ static inline struct fw_ohci *fw_ohci(struct fw_card *card)
 
 static char ohci_driver_name[] = KBUILD_MODNAME;
 
+#define QUIRK_CYCLE_TIMER		1
+#define QUIRK_RESET_PACKET		2
+#define QUIRK_BE_HEADERS		4
+
+/* In case of multiple matches in ohci_quirks[], only the first one is used. */
+static const struct {
+	unsigned short vendor, device, flags;
+} ohci_quirks[] = {
+	{PCI_VENDOR_ID_TI,	PCI_ANY_ID,	QUIRK_RESET_PACKET},
+	{PCI_VENDOR_ID_AL,	PCI_ANY_ID,	QUIRK_CYCLE_TIMER},
+	{PCI_VENDOR_ID_NEC,	PCI_ANY_ID,	QUIRK_CYCLE_TIMER},
+	{PCI_VENDOR_ID_VIA,	PCI_ANY_ID,	QUIRK_CYCLE_TIMER},
+	{PCI_VENDOR_ID_APPLE,	PCI_DEVICE_ID_APPLE_UNI_N_FW, QUIRK_BE_HEADERS},
+};
+
+/* This overrides anything that was found in ohci_quirks[]. */
+static int param_quirks;
+module_param_named(quirks, param_quirks, int, 0644);
+MODULE_PARM_DESC(quirks, "Chip quirks (default = 0"
+	", nonatomic cycle timer = "	__stringify(QUIRK_CYCLE_TIMER)
+	", reset packet generation = "	__stringify(QUIRK_RESET_PACKET)
+	", AR/selfID endianess = "	__stringify(QUIRK_BE_HEADERS)
+	")");
+
 #ifdef CONFIG_FIREWIRE_OHCI_DEBUG
 
 #define OHCI_PARAM_DEBUG_AT_AR		1
@@ -275,7 +281,7 @@ static void log_irqs(u32 evt)
 	    !(evt & OHCI1394_busReset))
 		return;
 
-	fw_notify("IRQ %08x%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", evt,
+	fw_notify("IRQ %08x%s%s%s%s%s%s%s%s%s%s%s%s%s\n", evt,
 	    evt & OHCI1394_selfIDComplete	? " selfID"		: "",
 	    evt & OHCI1394_RQPkt		? " AR_req"		: "",
 	    evt & OHCI1394_RSPkt		? " AR_resp"		: "",
@@ -285,7 +291,6 @@ static void log_irqs(u32 evt)
 	    evt & OHCI1394_isochTx		? " IT"			: "",
 	    evt & OHCI1394_postedWriteErr	? " postedWriteErr"	: "",
 	    evt & OHCI1394_cycleTooLong		? " cycleTooLong"	: "",
-	    evt & OHCI1394_cycle64Seconds	? " cycle64Seconds"	: "",
 	    evt & OHCI1394_cycleInconsistent	? " cycleInconsistent"	: "",
 	    evt & OHCI1394_regAccessFail	? " regAccessFail"	: "",
 	    evt & OHCI1394_busReset		? " busReset"		: "",
@@ -293,8 +298,7 @@ static void log_irqs(u32 evt)
 		    OHCI1394_RSPkt | OHCI1394_reqTxComplete |
 		    OHCI1394_respTxComplete | OHCI1394_isochRx |
 		    OHCI1394_isochTx | OHCI1394_postedWriteErr |
-		    OHCI1394_cycleTooLong | OHCI1394_cycle64Seconds |
-		    OHCI1394_cycleInconsistent |
+		    OHCI1394_cycleTooLong | OHCI1394_cycleInconsistent |
 		    OHCI1394_regAccessFail | OHCI1394_busReset)
 						? " ?"			: "");
 }
@@ -524,7 +528,7 @@ static void ar_context_release(struct ar_context *ctx)
 
 #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
 #define cond_le32_to_cpu(v) \
-	(ohci->old_uninorth ? (__force __u32)(v) : le32_to_cpu(v))
+	(ohci->quirks & QUIRK_BE_HEADERS ? (__force __u32)(v) : le32_to_cpu(v))
 #else
 #define cond_le32_to_cpu(v) le32_to_cpu(v)
 #endif
@@ -605,7 +609,7 @@ static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
 	 * at a slightly incorrect time (in bus_reset_tasklet).
 	 */
 	if (evt == OHCI1394_evt_bus_reset) {
-		if (!ohci->bus_reset_packet_quirk)
+		if (!(ohci->quirks & QUIRK_RESET_PACKET))
 			ohci->request_generation = (p.header[2] >> 16) & 0xff;
 	} else if (ctx == &ohci->ar_request_ctx) {
 		fw_core_handle_request(&ohci->card, &p);
@@ -1329,7 +1333,7 @@ static void bus_reset_tasklet(unsigned long data)
 	context_stop(&ohci->at_response_ctx);
 	reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset);
 
-	if (ohci->bus_reset_packet_quirk)
+	if (ohci->quirks & QUIRK_RESET_PACKET)
 		ohci->request_generation = generation;
 
 	/*
@@ -1384,7 +1388,7 @@ static void bus_reset_tasklet(unsigned long data)
 static irqreturn_t irq_handler(int irq, void *data)
 {
 	struct fw_ohci *ohci = data;
-	u32 event, iso_event, cycle_time;
+	u32 event, iso_event;
 	int i;
 
 	event = reg_read(ohci, OHCI1394_IntEventClear);
@@ -1454,12 +1458,6 @@ static irqreturn_t irq_handler(int irq, void *data)
 			fw_notify("isochronous cycle inconsistent\n");
 	}
 
-	if (event & OHCI1394_cycle64Seconds) {
-		cycle_time = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
-		if ((cycle_time & 0x80000000) == 0)
-			atomic_inc(&ohci->bus_seconds);
-	}
-
 	return IRQ_HANDLED;
 }
 
@@ -1553,8 +1551,7 @@ static int ohci_enable(struct fw_card *card,
 		  OHCI1394_reqTxComplete | OHCI1394_respTxComplete |
 		  OHCI1394_isochRx | OHCI1394_isochTx |
 		  OHCI1394_postedWriteErr | OHCI1394_cycleTooLong |
-		  OHCI1394_cycleInconsistent |
-		  OHCI1394_cycle64Seconds | OHCI1394_regAccessFail |
+		  OHCI1394_cycleInconsistent | OHCI1394_regAccessFail |
 		  OHCI1394_masterIntEnable);
 	if (param_debug & OHCI_PARAM_DEBUG_BUSRESETS)
 		reg_write(ohci, OHCI1394_IntMaskSet, OHCI1394_busReset);
@@ -1794,16 +1791,61 @@ static int ohci_enable_phys_dma(struct fw_card *card,
 #endif /* CONFIG_FIREWIRE_OHCI_REMOTE_DMA */
 }
 
-static u64 ohci_get_bus_time(struct fw_card *card)
+static u32 cycle_timer_ticks(u32 cycle_timer)
 {
-	struct fw_ohci *ohci = fw_ohci(card);
-	u32 cycle_time;
-	u64 bus_time;
+	u32 ticks;
 
-	cycle_time = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
-	bus_time = ((u64)atomic_read(&ohci->bus_seconds) << 32) | cycle_time;
+	ticks = cycle_timer & 0xfff;
+	ticks += 3072 * ((cycle_timer >> 12) & 0x1fff);
+	ticks += (3072 * 8000) * (cycle_timer >> 25);
+
+	return ticks;
+}
+
+/*
+ * Some controllers exhibit one or more of the following bugs when updating the
+ * iso cycle timer register:
+ *  - When the lowest six bits are wrapping around to zero, a read that happens
+ *    at the same time will return garbage in the lowest ten bits.
+ *  - When the cycleOffset field wraps around to zero, the cycleCount field is
+ *    not incremented for about 60 ns.
+ *  - Occasionally, the entire register reads zero.
+ *
+ * To catch these, we read the register three times and ensure that the
+ * difference between each two consecutive reads is approximately the same, i.e.
+ * less than twice the other.  Furthermore, any negative difference indicates an
+ * error.  (A PCI read should take at least 20 ticks of the 24.576 MHz timer to
+ * execute, so we have enough precision to compute the ratio of the differences.)
+ */
+static u32 ohci_get_cycle_time(struct fw_card *card)
+{
+	struct fw_ohci *ohci = fw_ohci(card);
+	u32 c0, c1, c2;
+	u32 t0, t1, t2;
+	s32 diff01, diff12;
+	int i;
 
-	return bus_time;
+	c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
+
+	if (ohci->quirks & QUIRK_CYCLE_TIMER) {
+		i = 0;
+		c1 = c2;
+		c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
+		do {
+			c0 = c1;
+			c1 = c2;
+			c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
+			t0 = cycle_timer_ticks(c0);
+			t1 = cycle_timer_ticks(c1);
+			t2 = cycle_timer_ticks(c2);
+			diff01 = t1 - t0;
+			diff12 = t2 - t1;
+		} while ((diff01 <= 0 || diff12 <= 0 ||
+			  diff01 / diff12 >= 2 || diff12 / diff01 >= 2)
+			 && i++ < 20);
+	}
+
+	return c2;
 }
 
 static void copy_iso_headers(struct iso_context *ctx, void *p)
@@ -1828,52 +1870,6 @@ static void copy_iso_headers(struct iso_context *ctx, void *p)
 	ctx->header_length += ctx->base.header_size;
 }
 
-static int handle_ir_dualbuffer_packet(struct context *context,
-				       struct descriptor *d,
-				       struct descriptor *last)
-{
-	struct iso_context *ctx =
-		container_of(context, struct iso_context, context);
-	struct db_descriptor *db = (struct db_descriptor *) d;
-	__le32 *ir_header;
-	size_t header_length;
-	void *p, *end;
-
-	if (db->first_res_count != 0 && db->second_res_count != 0) {
-		if (ctx->excess_bytes <= le16_to_cpu(db->second_req_count)) {
-			/* This descriptor isn't done yet, stop iteration. */
-			return 0;
-		}
-		ctx->excess_bytes -= le16_to_cpu(db->second_req_count);
-	}
-
-	header_length = le16_to_cpu(db->first_req_count) -
-		le16_to_cpu(db->first_res_count);
-
-	p = db + 1;
-	end = p + header_length;
-	while (p < end) {
-		copy_iso_headers(ctx, p);
-		ctx->excess_bytes +=
-			(le32_to_cpu(*(__le32 *)(p + 4)) >> 16) & 0xffff;
-		p += max(ctx->base.header_size, (size_t)8);
-	}
-
-	ctx->excess_bytes -= le16_to_cpu(db->second_req_count) -
-		le16_to_cpu(db->second_res_count);
-
-	if (le16_to_cpu(db->control) & DESCRIPTOR_IRQ_ALWAYS) {
-		ir_header = (__le32 *) (db + 1);
-		ctx->base.callback(&ctx->base,
-				   le32_to_cpu(ir_header[0]) & 0xffff,
-				   ctx->header_length, ctx->header,
-				   ctx->base.callback_data);
-		ctx->header_length = 0;
-	}
-
-	return 1;
-}
-
 static int handle_ir_packet_per_buffer(struct context *context,
 				       struct descriptor *d,
 				       struct descriptor *last)
@@ -1960,10 +1956,7 @@ static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card,
 		channels = &ohci->ir_context_channels;
 		mask = &ohci->ir_context_mask;
 		list = ohci->ir_context_list;
-		if (ohci->use_dualbuffer)
-			callback = handle_ir_dualbuffer_packet;
-		else
-			callback = handle_ir_packet_per_buffer;
+		callback = handle_ir_packet_per_buffer;
 	}
 
 	spin_lock_irqsave(&ohci->lock, flags);
@@ -2026,8 +2019,6 @@ static int ohci_start_iso(struct fw_iso_context *base,
 	} else {
 		index = ctx - ohci->ir_context_list;
 		control = IR_CONTEXT_ISOCH_HEADER;
-		if (ohci->use_dualbuffer)
-			control |= IR_CONTEXT_DUAL_BUFFER_MODE;
 		match = (tags << 28) | (sync << 8) | ctx->base.channel;
 		if (cycle >= 0) {
 			match |= (cycle & 0x07fff) << 12;
@@ -2188,92 +2179,6 @@ static int ohci_queue_iso_transmit(struct fw_iso_context *base,
 	return 0;
 }
 
-static int ohci_queue_iso_receive_dualbuffer(struct fw_iso_context *base,
-					     struct fw_iso_packet *packet,
-					     struct fw_iso_buffer *buffer,
-					     unsigned long payload)
-{
-	struct iso_context *ctx = container_of(base, struct iso_context, base);
-	struct db_descriptor *db = NULL;
-	struct descriptor *d;
-	struct fw_iso_packet *p;
-	dma_addr_t d_bus, page_bus;
-	u32 z, header_z, length, rest;
-	int page, offset, packet_count, header_size;
-
-	/*
-	 * FIXME: Cycle lost behavior should be configurable: lose
-	 * packet, retransmit or terminate..
-	 */
-
-	p = packet;
-	z = 2;
-
-	/*
-	 * The OHCI controller puts the isochronous header and trailer in the
-	 * buffer, so we need at least 8 bytes.
-	 */
-	packet_count = p->header_length / ctx->base.header_size;
-	header_size = packet_count * max(ctx->base.header_size, (size_t)8);
-
-	/* Get header size in number of descriptors. */
-	header_z = DIV_ROUND_UP(header_size, sizeof(*d));
-	page     = payload >> PAGE_SHIFT;
-	offset   = payload & ~PAGE_MASK;
-	rest     = p->payload_length;
-	/*
-	 * The controllers I've tested have not worked correctly when
-	 * second_req_count is zero.  Rather than do something we know won't
-	 * work, return an error
-	 */
-	if (rest == 0)
-		return -EINVAL;
-
-	while (rest > 0) {
-		d = context_get_descriptors(&ctx->context,
-					    z + header_z, &d_bus);
-		if (d == NULL)
-			return -ENOMEM;
-
-		db = (struct db_descriptor *) d;
-		db->control = cpu_to_le16(DESCRIPTOR_STATUS |
-					  DESCRIPTOR_BRANCH_ALWAYS);
-		db->first_size =
-		    cpu_to_le16(max(ctx->base.header_size, (size_t)8));
-		if (p->skip && rest == p->payload_length) {
-			db->control |= cpu_to_le16(DESCRIPTOR_WAIT);
-			db->first_req_count = db->first_size;
-		} else {
-			db->first_req_count = cpu_to_le16(header_size);
-		}
-		db->first_res_count = db->first_req_count;
-		db->first_buffer = cpu_to_le32(d_bus + sizeof(*db));
-
-		if (p->skip && rest == p->payload_length)
-			length = 4;
-		else if (offset + rest < PAGE_SIZE)
-			length = rest;
-		else
-			length = PAGE_SIZE - offset;
-
-		db->second_req_count = cpu_to_le16(length);
-		db->second_res_count = db->second_req_count;
-		page_bus = page_private(buffer->pages[page]);
-		db->second_buffer = cpu_to_le32(page_bus + offset);
-
-		if (p->interrupt && length == rest)
-			db->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS);
-
-		context_append(&ctx->context, d, z, header_z);
-		offset = (offset + length) & ~PAGE_MASK;
-		rest -= length;
-		if (offset == 0)
-			page++;
-	}
-
-	return 0;
-}
-
 static int ohci_queue_iso_receive_packet_per_buffer(struct fw_iso_context *base,
 					struct fw_iso_packet *packet,
 					struct fw_iso_buffer *buffer,
@@ -2364,9 +2269,6 @@ static int ohci_queue_iso(struct fw_iso_context *base,
 	spin_lock_irqsave(&ctx->context.ohci->lock, flags);
 	if (base->type == FW_ISO_CONTEXT_TRANSMIT)
 		ret = ohci_queue_iso_transmit(base, packet, buffer, payload);
-	else if (ctx->context.ohci->use_dualbuffer)
-		ret = ohci_queue_iso_receive_dualbuffer(base, packet,
-							buffer, payload);
 	else
 		ret = ohci_queue_iso_receive_packet_per_buffer(base, packet,
 							buffer, payload);
@@ -2383,7 +2285,7 @@ static const struct fw_card_driver ohci_driver = {
 	.send_response		= ohci_send_response,
 	.cancel_packet		= ohci_cancel_packet,
 	.enable_phys_dma	= ohci_enable_phys_dma,
-	.get_bus_time		= ohci_get_bus_time,
+	.get_cycle_time		= ohci_get_cycle_time,
 
 	.allocate_iso_context	= ohci_allocate_iso_context,
 	.free_iso_context	= ohci_free_iso_context,
@@ -2421,17 +2323,13 @@ static void ohci_pmac_off(struct pci_dev *dev)
 #define ohci_pmac_off(dev)
 #endif /* CONFIG_PPC_PMAC */
 
-#define PCI_VENDOR_ID_AGERE		PCI_VENDOR_ID_ATT
-#define PCI_DEVICE_ID_AGERE_FW643	0x5901
-#define PCI_DEVICE_ID_TI_TSB43AB23	0x8024
-
 static int __devinit pci_probe(struct pci_dev *dev,
 			       const struct pci_device_id *ent)
 {
 	struct fw_ohci *ohci;
 	u32 bus_options, max_receive, link_speed, version;
 	u64 guid;
-	int err;
+	int i, err, n_ir, n_it;
 	size_t size;
 
 	ohci = kzalloc(sizeof(*ohci), GFP_KERNEL);
@@ -2472,36 +2370,15 @@ static int __devinit pci_probe(struct pci_dev *dev,
 		goto fail_iomem;
 	}
 
-	version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
-#if 0
-	/* FIXME: make it a context option or remove dual-buffer mode */
-	ohci->use_dualbuffer = version >= OHCI_VERSION_1_1;
-#endif
-
-	/* dual-buffer mode is broken if more than one IR context is active */
-	if (dev->vendor == PCI_VENDOR_ID_AGERE &&
-	    dev->device == PCI_DEVICE_ID_AGERE_FW643)
-		ohci->use_dualbuffer = false;
-
-	/* dual-buffer mode is broken */
-	if (dev->vendor == PCI_VENDOR_ID_RICOH &&
-	    dev->device == PCI_DEVICE_ID_RICOH_R5C832)
-		ohci->use_dualbuffer = false;
-
-/* x86-32 currently doesn't use highmem for dma_alloc_coherent */
-#if !defined(CONFIG_X86_32)
-	/* dual-buffer mode is broken with descriptor addresses above 2G */
-	if (dev->vendor == PCI_VENDOR_ID_TI &&
-	    (dev->device == PCI_DEVICE_ID_TI_TSB43AB22 ||
-	     dev->device == PCI_DEVICE_ID_TI_TSB43AB23))
-		ohci->use_dualbuffer = false;
-#endif
-
-#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
-	ohci->old_uninorth = dev->vendor == PCI_VENDOR_ID_APPLE &&
-			     dev->device == PCI_DEVICE_ID_APPLE_UNI_N_FW;
-#endif
-	ohci->bus_reset_packet_quirk = dev->vendor == PCI_VENDOR_ID_TI;
+	for (i = 0; i < ARRAY_SIZE(ohci_quirks); i++)
+		if (ohci_quirks[i].vendor == dev->vendor &&
+		    (ohci_quirks[i].device == dev->device ||
+		     ohci_quirks[i].device == (unsigned short)PCI_ANY_ID)) {
+			ohci->quirks = ohci_quirks[i].flags;
+			break;
+		}
+	if (param_quirks)
+		ohci->quirks = param_quirks;
 
 	ar_context_init(&ohci->ar_request_ctx, ohci,
 			OHCI1394_AsReqRcvContextControlSet);
@@ -2516,17 +2393,19 @@ static int __devinit pci_probe(struct pci_dev *dev,
 		     OHCI1394_AsRspTrContextControlSet, handle_at_packet);
 
 	reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0);
-	ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet);
+	ohci->ir_context_channels = ~0ULL;
+	ohci->ir_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet);
 	reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0);
-	size = sizeof(struct iso_context) * hweight32(ohci->it_context_mask);
-	ohci->it_context_list = kzalloc(size, GFP_KERNEL);
+	n_ir = hweight32(ohci->ir_context_mask);
+	size = sizeof(struct iso_context) * n_ir;
+	ohci->ir_context_list = kzalloc(size, GFP_KERNEL);
 
 	reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0);
-	ohci->ir_context_channels = ~0ULL;
-	ohci->ir_context_mask = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet);
+	ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet);
 	reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0);
-	size = sizeof(struct iso_context) * hweight32(ohci->ir_context_mask);
-	ohci->ir_context_list = kzalloc(size, GFP_KERNEL);
+	n_it = hweight32(ohci->it_context_mask);
+	size = sizeof(struct iso_context) * n_it;
+	ohci->it_context_list = kzalloc(size, GFP_KERNEL);
 
 	if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) {
 		err = -ENOMEM;
@@ -2553,8 +2432,11 @@ static int __devinit pci_probe(struct pci_dev *dev,
 	if (err)
 		goto fail_self_id;
 
-	fw_notify("Added fw-ohci device %s, OHCI version %x.%x\n",
-		  dev_name(&dev->dev), version >> 16, version & 0xff);
+	version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
+	fw_notify("Added fw-ohci device %s, OHCI v%x.%x, "
+		  "%d IR + %d IT contexts, quirks 0x%x\n",
+		  dev_name(&dev->dev), version >> 16, version & 0xff,
+		  n_ir, n_it, ohci->quirks);
 
 	return 0;
 
@@ -2662,7 +2544,7 @@ static int pci_resume(struct pci_dev *dev)
 }
 #endif
 
-static struct pci_device_id pci_table[] = {
+static const struct pci_device_id pci_table[] = {
 	{ PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_FIREWIRE_OHCI, ~0) },
 	{ }
 };
diff --git a/drivers/firewire/sbp2.c b/drivers/firewire/sbp2.c
index 70fef40cd22..ca264f2fdf0 100644
--- a/drivers/firewire/sbp2.c
+++ b/drivers/firewire/sbp2.c
@@ -1014,7 +1014,8 @@ static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry)
 	return 0;
 }
 
-static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory)
+static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt,
+				      const u32 *directory)
 {
 	struct fw_csr_iterator ci;
 	int key, value;
@@ -1027,7 +1028,7 @@ static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory)
 	return 0;
 }
 
-static int sbp2_scan_unit_dir(struct sbp2_target *tgt, u32 *directory,
+static int sbp2_scan_unit_dir(struct sbp2_target *tgt, const u32 *directory,
 			      u32 *model, u32 *firmware_revision)
 {
 	struct fw_csr_iterator ci;