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path: root/drivers/usb/gadget/udc/dummy_hcd.c
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Diffstat (limited to 'drivers/usb/gadget/udc/dummy_hcd.c')
-rw-r--r--drivers/usb/gadget/udc/dummy_hcd.c37
1 files changed, 22 insertions, 15 deletions
diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/dummy_hcd.c
index 0953e1b5c0..f37b0d8386 100644
--- a/drivers/usb/gadget/udc/dummy_hcd.c
+++ b/drivers/usb/gadget/udc/dummy_hcd.c
@@ -30,7 +30,7 @@
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/init.h>
-#include <linux/timer.h>
+#include <linux/hrtimer.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
@@ -50,6 +50,8 @@
#define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */
#define POWER_BUDGET_3 900 /* in mA */
+#define DUMMY_TIMER_INT_NSECS 125000 /* 1 microframe */
+
static const char driver_name[] = "dummy_hcd";
static const char driver_desc[] = "USB Host+Gadget Emulator";
@@ -240,7 +242,7 @@ enum dummy_rh_state {
struct dummy_hcd {
struct dummy *dum;
enum dummy_rh_state rh_state;
- struct timer_list timer;
+ struct hrtimer timer;
u32 port_status;
u32 old_status;
unsigned long re_timeout;
@@ -1301,8 +1303,8 @@ static int dummy_urb_enqueue(
urb->error_count = 1; /* mark as a new urb */
/* kick the scheduler, it'll do the rest */
- if (!timer_pending(&dum_hcd->timer))
- mod_timer(&dum_hcd->timer, jiffies + 1);
+ if (!hrtimer_active(&dum_hcd->timer))
+ hrtimer_start(&dum_hcd->timer, ns_to_ktime(DUMMY_TIMER_INT_NSECS), HRTIMER_MODE_REL);
done:
spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
@@ -1323,7 +1325,7 @@ static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
rc = usb_hcd_check_unlink_urb(hcd, urb, status);
if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING &&
!list_empty(&dum_hcd->urbp_list))
- mod_timer(&dum_hcd->timer, jiffies);
+ hrtimer_start(&dum_hcd->timer, ns_to_ktime(0), HRTIMER_MODE_REL);
spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
return rc;
@@ -1777,7 +1779,7 @@ static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb,
* drivers except that the callbacks are invoked from soft interrupt
* context.
*/
-static void dummy_timer(struct timer_list *t)
+static enum hrtimer_restart dummy_timer(struct hrtimer *t)
{
struct dummy_hcd *dum_hcd = from_timer(dum_hcd, t, timer);
struct dummy *dum = dum_hcd->dum;
@@ -1808,8 +1810,6 @@ static void dummy_timer(struct timer_list *t)
break;
}
- /* FIXME if HZ != 1000 this will probably misbehave ... */
-
/* look at each urb queued by the host side driver */
spin_lock_irqsave(&dum->lock, flags);
@@ -1817,7 +1817,7 @@ static void dummy_timer(struct timer_list *t)
dev_err(dummy_dev(dum_hcd),
"timer fired with no URBs pending?\n");
spin_unlock_irqrestore(&dum->lock, flags);
- return;
+ return HRTIMER_NORESTART;
}
dum_hcd->next_frame_urbp = NULL;
@@ -1995,10 +1995,12 @@ return_urb:
dum_hcd->udev = NULL;
} else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
/* want a 1 msec delay here */
- mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1));
+ hrtimer_start(&dum_hcd->timer, ns_to_ktime(DUMMY_TIMER_INT_NSECS), HRTIMER_MODE_REL);
}
spin_unlock_irqrestore(&dum->lock, flags);
+
+ return HRTIMER_NORESTART;
}
/*-------------------------------------------------------------------------*/
@@ -2387,7 +2389,7 @@ static int dummy_bus_resume(struct usb_hcd *hcd)
dum_hcd->rh_state = DUMMY_RH_RUNNING;
set_link_state(dum_hcd);
if (!list_empty(&dum_hcd->urbp_list))
- mod_timer(&dum_hcd->timer, jiffies);
+ hrtimer_start(&dum_hcd->timer, ns_to_ktime(0), HRTIMER_MODE_REL);
hcd->state = HC_STATE_RUNNING;
}
spin_unlock_irq(&dum_hcd->dum->lock);
@@ -2465,7 +2467,8 @@ static DEVICE_ATTR_RO(urbs);
static int dummy_start_ss(struct dummy_hcd *dum_hcd)
{
- timer_setup(&dum_hcd->timer, dummy_timer, 0);
+ hrtimer_init(&dum_hcd->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ dum_hcd->timer.function = dummy_timer;
dum_hcd->rh_state = DUMMY_RH_RUNNING;
dum_hcd->stream_en_ep = 0;
INIT_LIST_HEAD(&dum_hcd->urbp_list);
@@ -2494,7 +2497,8 @@ static int dummy_start(struct usb_hcd *hcd)
return dummy_start_ss(dum_hcd);
spin_lock_init(&dum_hcd->dum->lock);
- timer_setup(&dum_hcd->timer, dummy_timer, 0);
+ hrtimer_init(&dum_hcd->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ dum_hcd->timer.function = dummy_timer;
dum_hcd->rh_state = DUMMY_RH_RUNNING;
INIT_LIST_HEAD(&dum_hcd->urbp_list);
@@ -2513,8 +2517,11 @@ static int dummy_start(struct usb_hcd *hcd)
static void dummy_stop(struct usb_hcd *hcd)
{
- device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs);
- dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n");
+ struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
+
+ hrtimer_cancel(&dum_hcd->timer);
+ device_remove_file(dummy_dev(dum_hcd), &dev_attr_urbs);
+ dev_info(dummy_dev(dum_hcd), "stopped\n");
}
/*-------------------------------------------------------------------------*/