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[media] rc: rc-loopback: Add loopback of filter scancodes 

Add the s_wakeup_filter callback to the rc-loopback driver, which instead
of setting the filter just feeds the scancode back through the input
device so that it can be verified.

Signed-off-by: James Hogan <james@albanarts.com>
Signed-off-by: Antti Seppälä <a.seppala@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Cc: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
James Hogan 2015-03-31 14:48:11 -03:00 committed by Mauro Carvalho Chehab
parent f423ccc1a3
commit 914535c059
1 changed files with 39 additions and 0 deletions
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39
drivers/media/rc/rc-loopback.c
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@ -22,6 +22,7 @@
#include <linux/device.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <media/rc-core.h>
#define DRIVER_NAME "rc-loopback"
@ -172,6 +173,41 @@ static int loop_set_carrier_report(struct rc_dev *dev, int enable)
return 0;
}
static int loop_set_wakeup_filter(struct rc_dev *dev,
struct rc_scancode_filter *sc)
{
static const unsigned int max = 512;
struct ir_raw_event *raw;
int ret;
int i;
/* fine to disable filter */
if (!sc->mask)
return 0;
/* encode the specified filter and loop it back */
raw = kmalloc_array(max, sizeof(*raw), GFP_KERNEL);
if (!raw)
return -ENOMEM;
ret = ir_raw_encode_scancode(dev->wakeup_protocol, sc->data, raw, max);
/* still loop back the partial raw IR even if it's incomplete */
if (ret == -ENOBUFS)
ret = max;
if (ret >= 0) {
/* do the loopback */
for (i = 0; i < ret; ++i)
ir_raw_event_store(dev, &raw[i]);
ir_raw_event_handle(dev);
ret = 0;
}
kfree(raw);
return ret;
}
static int __init loop_init(void)
{
struct rc_dev *rc;
@ -192,6 +228,8 @@ static int __init loop_init(void)
rc->priv = &loopdev;
rc->driver_type = RC_DRIVER_IR_RAW;
rc->allowed_protocols = RC_BIT_ALL_IR_DECODER;
rc->allowed_wakeup_protocols = RC_BIT_ALL_IR_ENCODER;
rc->encode_wakeup = true;
rc->timeout = 100 * 1000 * 1000; /* 100 ms */
rc->min_timeout = 1;
rc->max_timeout = UINT_MAX;
@ -205,6 +243,7 @@ static int __init loop_init(void)
rc->s_idle = loop_set_idle;
rc->s_learning_mode = loop_set_learning_mode;
rc->s_carrier_report = loop_set_carrier_report;
rc->s_wakeup_filter = loop_set_wakeup_filter;
loopdev.txmask = RXMASK_REGULAR;
loopdev.txcarrier = 36000;