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authorStefan Richter <stefanr@s5r6.in-berlin.de>2007-09-29 10:41:58 +0200
committerStefan Richter <stefanr@s5r6.in-berlin.de>2007-10-17 00:00:08 +0200
commita64408b96b5f67c2778958a230b5cfa3408a4a81 (patch)
tree5dbd798b626f3693fa9950fa2a3b37e489aa6bbd /drivers/firewire
parent02ff8f8ee151e880414b99a11f67cae0cecd4977 (diff)
firewire: adopt read cycle timer ABI from raw1394
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>
Diffstat (limited to 'drivers/firewire')
-rw-r--r--drivers/firewire/fw-cdev.c26
1 files changed, 26 insertions, 0 deletions
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