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path: root/drivers/media/rc/rc-loopback.c
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Diffstat (limited to 'drivers/media/rc/rc-loopback.c')
-rw-r--r--drivers/media/rc/rc-loopback.c153
1 files changed, 90 insertions, 63 deletions
diff --git a/drivers/media/rc/rc-loopback.c b/drivers/media/rc/rc-loopback.c
index 53d02827a472..8288366f891f 100644
--- a/drivers/media/rc/rc-loopback.c
+++ b/drivers/media/rc/rc-loopback.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Loopback driver for rc-core,
*
@@ -6,34 +7,17 @@
* This driver receives TX data and passes it back as RX data,
* which is useful for (scripted) debugging of rc-core without
* having to use actual hardware.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
*/
#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"
-#define dprintk(x...) if (debug) printk(KERN_INFO DRIVER_NAME ": " x)
-#define RXMASK_REGULAR 0x1
-#define RXMASK_LEARNING 0x2
-
-static bool debug;
+#define DRIVER_NAME "rc-loopback"
+#define RXMASK_NARROWBAND 0x1
+#define RXMASK_WIDEBAND 0x2
struct loopback_dev {
struct rc_dev *dev;
@@ -41,7 +25,7 @@ struct loopback_dev {
u32 txcarrier;
u32 txduty;
bool idle;
- bool learning;
+ bool wideband;
bool carrierreport;
u32 rxcarriermin;
u32 rxcarriermax;
@@ -53,12 +37,12 @@ static int loop_set_tx_mask(struct rc_dev *dev, u32 mask)
{
struct loopback_dev *lodev = dev->priv;
- if ((mask & (RXMASK_REGULAR | RXMASK_LEARNING)) != mask) {
- dprintk("invalid tx mask: %u\n", mask);
- return -EINVAL;
+ if ((mask & (RXMASK_NARROWBAND | RXMASK_WIDEBAND)) != mask) {
+ dev_dbg(&dev->dev, "invalid tx mask: %u\n", mask);
+ return 2;
}
- dprintk("setting tx mask: %u\n", mask);
+ dev_dbg(&dev->dev, "setting tx mask: %u\n", mask);
lodev->txmask = mask;
return 0;
}
@@ -67,7 +51,7 @@ static int loop_set_tx_carrier(struct rc_dev *dev, u32 carrier)
{
struct loopback_dev *lodev = dev->priv;
- dprintk("setting tx carrier: %u\n", carrier);
+ dev_dbg(&dev->dev, "setting tx carrier: %u\n", carrier);
lodev->txcarrier = carrier;
return 0;
}
@@ -77,11 +61,11 @@ static int loop_set_tx_duty_cycle(struct rc_dev *dev, u32 duty_cycle)
struct loopback_dev *lodev = dev->priv;
if (duty_cycle < 1 || duty_cycle > 99) {
- dprintk("invalid duty cycle: %u\n", duty_cycle);
+ dev_dbg(&dev->dev, "invalid duty cycle: %u\n", duty_cycle);
return -EINVAL;
}
- dprintk("setting duty cycle: %u\n", duty_cycle);
+ dev_dbg(&dev->dev, "setting duty cycle: %u\n", duty_cycle);
lodev->txduty = duty_cycle;
return 0;
}
@@ -91,11 +75,11 @@ static int loop_set_rx_carrier_range(struct rc_dev *dev, u32 min, u32 max)
struct loopback_dev *lodev = dev->priv;
if (min < 1 || min > max) {
- dprintk("invalid rx carrier range %u to %u\n", min, max);
+ dev_dbg(&dev->dev, "invalid rx carrier range %u to %u\n", min, max);
return -EINVAL;
}
- dprintk("setting rx carrier range %u to %u\n", min, max);
+ dev_dbg(&dev->dev, "setting rx carrier range %u to %u\n", min, max);
lodev->rxcarriermin = min;
lodev->rxcarriermax = max;
return 0;
@@ -106,31 +90,43 @@ static int loop_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)
struct loopback_dev *lodev = dev->priv;
u32 rxmask;
unsigned i;
- DEFINE_IR_RAW_EVENT(rawir);
+ struct ir_raw_event rawir = {};
if (lodev->txcarrier < lodev->rxcarriermin ||
lodev->txcarrier > lodev->rxcarriermax) {
- dprintk("ignoring tx, carrier out of range\n");
+ dev_dbg(&dev->dev, "ignoring tx, carrier out of range\n");
goto out;
}
- if (lodev->learning)
- rxmask = RXMASK_LEARNING;
+ if (lodev->wideband)
+ rxmask = RXMASK_WIDEBAND;
else
- rxmask = RXMASK_REGULAR;
+ rxmask = RXMASK_NARROWBAND;
if (!(rxmask & lodev->txmask)) {
- dprintk("ignoring tx, rx mask mismatch\n");
+ dev_dbg(&dev->dev, "ignoring tx, rx mask mismatch\n");
goto out;
}
for (i = 0; i < count; i++) {
rawir.pulse = i % 2 ? false : true;
- rawir.duration = txbuf[i] * 1000;
- if (rawir.duration)
+ rawir.duration = txbuf[i];
+
+ /* simulate overflow if ridiculously long pulse was sent */
+ if (rawir.pulse && rawir.duration > MS_TO_US(50))
+ ir_raw_event_overflow(dev);
+ else
ir_raw_event_store_with_filter(dev, &rawir);
}
+ if (lodev->carrierreport) {
+ rawir.pulse = false;
+ rawir.carrier_report = true;
+ rawir.carrier = lodev->txcarrier;
+
+ ir_raw_event_store(dev, &rawir);
+ }
+
/* Fake a silence long enough to cause us to go idle */
rawir.pulse = false;
rawir.duration = dev->timeout;
@@ -147,18 +143,18 @@ static void loop_set_idle(struct rc_dev *dev, bool enable)
struct loopback_dev *lodev = dev->priv;
if (lodev->idle != enable) {
- dprintk("%sing idle mode\n", enable ? "enter" : "exit");
+ dev_dbg(&dev->dev, "%sing idle mode\n", enable ? "enter" : "exit");
lodev->idle = enable;
}
}
-static int loop_set_learning_mode(struct rc_dev *dev, int enable)
+static int loop_set_wideband_receiver(struct rc_dev *dev, int enable)
{
struct loopback_dev *lodev = dev->priv;
- if (lodev->learning != enable) {
- dprintk("%sing learning mode\n", enable ? "enter" : "exit");
- lodev->learning = !!enable;
+ if (lodev->wideband != enable) {
+ dev_dbg(&dev->dev, "using %sband receiver\n", enable ? "wide" : "narrow");
+ lodev->wideband = !!enable;
}
return 0;
@@ -169,59 +165,93 @@ static int loop_set_carrier_report(struct rc_dev *dev, int enable)
struct loopback_dev *lodev = dev->priv;
if (lodev->carrierreport != enable) {
- dprintk("%sabling carrier reports\n", enable ? "en" : "dis");
+ dev_dbg(&dev->dev, "%sabling carrier reports\n", enable ? "en" : "dis");
lodev->carrierreport = !!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;
int ret;
- rc = rc_allocate_device();
- if (!rc) {
- printk(KERN_ERR DRIVER_NAME ": rc_dev allocation failed\n");
+ rc = rc_allocate_device(RC_DRIVER_IR_RAW);
+ if (!rc)
return -ENOMEM;
- }
- rc->input_name = "rc-core loopback device";
+ rc->device_name = "rc-core loopback device";
rc->input_phys = "rc-core/virtual";
rc->input_id.bustype = BUS_VIRTUAL;
rc->input_id.version = 1;
rc->driver_name = DRIVER_NAME;
rc->map_name = RC_MAP_EMPTY;
rc->priv = &loopdev;
- rc->driver_type = RC_DRIVER_IR_RAW;
- rc->allowed_protos = RC_BIT_ALL;
- rc->timeout = 100 * 1000 * 1000; /* 100 ms */
+ rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
+ rc->allowed_wakeup_protocols = RC_PROTO_BIT_ALL_IR_ENCODER;
+ rc->encode_wakeup = true;
+ rc->timeout = IR_DEFAULT_TIMEOUT;
rc->min_timeout = 1;
- rc->max_timeout = UINT_MAX;
- rc->rx_resolution = 1000;
- rc->tx_resolution = 1000;
+ rc->max_timeout = IR_MAX_TIMEOUT;
+ rc->rx_resolution = 1;
rc->s_tx_mask = loop_set_tx_mask;
rc->s_tx_carrier = loop_set_tx_carrier;
rc->s_tx_duty_cycle = loop_set_tx_duty_cycle;
rc->s_rx_carrier_range = loop_set_rx_carrier_range;
rc->tx_ir = loop_tx_ir;
rc->s_idle = loop_set_idle;
- rc->s_learning_mode = loop_set_learning_mode;
+ rc->s_wideband_receiver = loop_set_wideband_receiver;
rc->s_carrier_report = loop_set_carrier_report;
+ rc->s_wakeup_filter = loop_set_wakeup_filter;
- loopdev.txmask = RXMASK_REGULAR;
+ loopdev.txmask = RXMASK_NARROWBAND;
loopdev.txcarrier = 36000;
loopdev.txduty = 50;
loopdev.rxcarriermin = 1;
loopdev.rxcarriermax = ~0;
loopdev.idle = true;
- loopdev.learning = false;
+ loopdev.wideband = false;
loopdev.carrierreport = false;
ret = rc_register_device(rc);
if (ret < 0) {
- printk(KERN_ERR DRIVER_NAME ": rc_dev registration failed\n");
+ dev_err(&rc->dev, "rc_dev registration failed\n");
rc_free_device(rc);
return ret;
}
@@ -238,9 +268,6 @@ static void __exit loop_exit(void)
module_init(loop_init);
module_exit(loop_exit);
-module_param(debug, bool, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(debug, "Enable debug messages");
-
MODULE_DESCRIPTION("Loopback device for rc-core debugging");
MODULE_AUTHOR("David Härdeman <david@hardeman.nu>");
MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2025-12-21 21:11:46 +0000