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[media] redrat3: fix timeout handling 

The redrat3 sends an usb packet to the host either when the minimum pause
or the timeout occurs, so we can always add a trailing space in our
processing.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Sean Young 2016-07-10 13:34:37 -03:00 committed by Mauro Carvalho Chehab
parent 14d8188aab
commit 25da661a14
1 changed files with 11 additions and 37 deletions
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48
drivers/media/rc/redrat3.c
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@ -188,8 +188,7 @@ struct redrat3_dev {
/* usb dma */
dma_addr_t dma_in;
/* rx signal timeout timer */
struct timer_list rx_timeout;
/* rx signal timeout */
u32 hw_timeout;
/* Is the device currently transmitting?*/
@ -330,22 +329,11 @@ static u32 redrat3_us_to_len(u32 microsec)
return result ? result : 1;
}
/* timer callback to send reset event */
static void redrat3_rx_timeout(unsigned long data)
{
struct redrat3_dev *rr3 = (struct redrat3_dev *)data;
dev_dbg(rr3->dev, "calling ir_raw_event_reset\n");
ir_raw_event_reset(rr3->rc);
}
static void redrat3_process_ir_data(struct redrat3_dev *rr3)
{
DEFINE_IR_RAW_EVENT(rawir);
struct device *dev;
unsigned i, trailer = 0;
unsigned sig_size, single_len, offset, val;
unsigned long delay;
unsigned int i, sig_size, single_len, offset, val;
u32 mod_freq;
if (!rr3) {
@ -355,10 +343,6 @@ static void redrat3_process_ir_data(struct redrat3_dev *rr3)
dev = rr3->dev;
/* Make sure we reset the IR kfifo after a bit of inactivity */
delay = usecs_to_jiffies(rr3->hw_timeout);
mod_timer(&rr3->rx_timeout, jiffies + delay);
mod_freq = redrat3_val_to_mod_freq(&rr3->irdata);
dev_dbg(dev, "Got mod_freq of %u\n", mod_freq);
@ -376,9 +360,6 @@ static void redrat3_process_ir_data(struct redrat3_dev *rr3)
rawir.pulse = true;
rawir.duration = US_TO_NS(single_len);
/* Save initial pulse length to fudge trailer */
if (i == 0)
trailer = rawir.duration;
/* cap the value to IR_MAX_DURATION */
rawir.duration = (rawir.duration > IR_MAX_DURATION) ?
IR_MAX_DURATION : rawir.duration;
@ -388,18 +369,13 @@ static void redrat3_process_ir_data(struct redrat3_dev *rr3)
ir_raw_event_store_with_filter(rr3->rc, &rawir);
}
/* add a trailing space, if need be */
if (i % 2) {
rawir.pulse = false;
/* this duration is made up, and may not be ideal... */
if (trailer < US_TO_NS(1000))
rawir.duration = US_TO_NS(2800);
else
rawir.duration = trailer;
dev_dbg(dev, "storing trailing space with duration %d\n",
rawir.duration);
ir_raw_event_store_with_filter(rr3->rc, &rawir);
}
/* add a trailing space */
rawir.pulse = false;
rawir.timeout = true;
rawir.duration = US_TO_NS(rr3->hw_timeout);
dev_dbg(dev, "storing trailing timeout with duration %d\n",
rawir.duration);
ir_raw_event_store_with_filter(rr3->rc, &rawir);
dev_dbg(dev, "calling ir_raw_event_handle\n");
ir_raw_event_handle(rr3->rc);
@ -880,7 +856,7 @@ static struct rc_dev *redrat3_init_rc_dev(struct redrat3_dev *rr3)
rc->priv = rr3;
rc->driver_type = RC_DRIVER_IR_RAW;
rc->allowed_protocols = RC_BIT_ALL;
rc->timeout = US_TO_NS(2750);
rc->timeout = US_TO_NS(rr3->hw_timeout);
rc->tx_ir = redrat3_transmit_ir;
rc->s_tx_carrier = redrat3_set_tx_carrier;
rc->driver_name = DRIVER_NAME;
@ -990,7 +966,7 @@ static int redrat3_dev_probe(struct usb_interface *intf,
if (retval < 0)
goto error;
/* store current hardware timeout, in us, will use for kfifo resets */
/* store current hardware timeout, in µs */
rr3->hw_timeout = redrat3_get_timeout(rr3);
/* default.. will get overridden by any sends with a freq defined */
@ -1026,7 +1002,6 @@ static int redrat3_dev_probe(struct usb_interface *intf,
retval = -ENOMEM;
goto led_free_error;
}
setup_timer(&rr3->rx_timeout, redrat3_rx_timeout, (unsigned long)rr3);
/* we can register the device now, as it is ready */
usb_set_intfdata(intf, rr3);
@ -1055,7 +1030,6 @@ static void redrat3_dev_disconnect(struct usb_interface *intf)
usb_set_intfdata(intf, NULL);
rc_unregister_device(rr3->rc);
led_classdev_unregister(&rr3->led);
del_timer_sync(&rr3->rx_timeout);
redrat3_delete(rr3, udev);
}