From a64408b96b5f67c2778958a230b5cfa3408a4a81 Mon Sep 17 00:00:00 2001
From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Sat, 29 Sep 2007 10:41:58 +0200
Subject: firewire: adopt read cycle timer ABI from raw1394
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This duplicates the read cycle timer feature of raw1394 (added in Linux
2.6.21) in firewire-core's userspace ABI.  The argument to the ioctl is
reordered though to ensure 32/64 bit compatibility.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
---
 drivers/firewire/fw-cdev.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'drivers')

diff --git a/drivers/firewire/fw-cdev.c b/drivers/firewire/fw-cdev.c
index b960fd996918..290d9f036199 100644
--- a/drivers/firewire/fw-cdev.c
+++ b/drivers/firewire/fw-cdev.c
@@ -25,11 +25,14 @@
 #include <linux/device.h>
 #include <linux/vmalloc.h>
 #include <linux/poll.h>
+#include <linux/preempt.h>
+#include <linux/time.h>
 #include <linux/delay.h>
 #include <linux/mm.h>
 #include <linux/idr.h>
 #include <linux/compat.h>
 #include <linux/firewire-cdev.h>
+#include <asm/system.h>
 #include <asm/uaccess.h>
 #include "fw-transaction.h"
 #include "fw-topology.h"
@@ -811,6 +814,28 @@ static int ioctl_stop_iso(struct client *client, void *buffer)
 	return fw_iso_context_stop(client->iso_context);
 }
 
+static int ioctl_get_cycle_timer(struct client *client, void *buffer)
+{
+	struct fw_cdev_get_cycle_timer *request = buffer;
+	struct fw_card *card = client->device->card;
+	unsigned long long bus_time;
+	struct timeval tv;
+	unsigned long flags;
+
+	preempt_disable();
+	local_irq_save(flags);
+
+	bus_time = card->driver->get_bus_time(card);
+	do_gettimeofday(&tv);
+
+	local_irq_restore(flags);
+	preempt_enable();
+
+	request->local_time = tv.tv_sec * 1000000ULL + tv.tv_usec;
+	request->cycle_timer = bus_time & 0xffffffff;
+	return 0;
+}
+
 static int (* const ioctl_handlers[])(struct client *client, void *buffer) = {
 	ioctl_get_info,
 	ioctl_send_request,
@@ -824,6 +849,7 @@ static int (* const ioctl_handlers[])(struct client *client, void *buffer) = {
 	ioctl_queue_iso,
 	ioctl_start_iso,
 	ioctl_stop_iso,
+	ioctl_get_cycle_timer,
 };
 
 static int
-- 
cgit v1.2.3-58-ga151