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[media] rc: rc-loopback: Add loopback of filter scancodes
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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 <[email protected]>
Signed-off-by: Antti Seppälä <[email protected]>
Cc: David Härdeman <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
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amalon authored and mchehab committed May 14, 2015
1 parent 0d830b2 commit 2e4ebde
Showing 1 changed file with 36 additions and 0 deletions.
36 changes: 36 additions & 0 deletions drivers/media/rc/rc-loopback.c
Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@
#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"
Expand Down Expand Up @@ -176,6 +177,39 @@ 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_filter)
{
static const unsigned int max = 512;
struct ir_raw_event *raw;
int ret;
int i;

/* fine to disable filter */
if (!sc_filter->mask)
return 0;

/* encode the specified filter and loop it back */
raw = kmalloc_array(max, sizeof(*raw), GFP_KERNEL);
ret = ir_raw_encode_scancode(dev->enabled_wakeup_protocols, sc_filter,
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;
Expand All @@ -195,6 +229,7 @@ static int __init loop_init(void)
rc->map_name = RC_MAP_EMPTY;
rc->priv = &loopdev;
rc->driver_type = RC_DRIVER_IR_RAW;
rc->encode_wakeup = true;
rc->allowed_protocols = RC_BIT_ALL;
rc->timeout = 100 * 1000 * 1000; /* 100 ms */
rc->min_timeout = 1;
Expand All @@ -209,6 +244,7 @@ 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;
Expand Down

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