1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Loopback driver for rc-core,
8  * which is useful for (scripted) debugging of rc-core without
16 #include <media/rc-core.h>
18 #define DRIVER_NAME		"rc-loopback"
34 static struct loopback_dev loopdev;
36 static int loop_set_tx_mask(struct rc_dev *dev, u32 mask)  in loop_set_tx_mask()
38 	struct loopback_dev *lodev = dev->priv;  in loop_set_tx_mask()
41 		dev_dbg(&dev->dev, "invalid tx mask: %u\n", mask);  in loop_set_tx_mask()
45 	dev_dbg(&dev->dev, "setting tx mask: %u\n", mask);  in loop_set_tx_mask()
46 	lodev->txmask = mask;  in loop_set_tx_mask()
50 static int loop_set_tx_carrier(struct rc_dev *dev, u32 carrier)  in loop_set_tx_carrier()
52 	struct loopback_dev *lodev = dev->priv;  in loop_set_tx_carrier()
54 	dev_dbg(&dev->dev, "setting tx carrier: %u\n", carrier);  in loop_set_tx_carrier()
55 	lodev->txcarrier = carrier;  in loop_set_tx_carrier()
59 static int loop_set_tx_duty_cycle(struct rc_dev *dev, u32 duty_cycle)  in loop_set_tx_duty_cycle()
61 	struct loopback_dev *lodev = dev->priv;  in loop_set_tx_duty_cycle()
64 		dev_dbg(&dev->dev, "invalid duty cycle: %u\n", duty_cycle);  in loop_set_tx_duty_cycle()
65 		return -EINVAL;  in loop_set_tx_duty_cycle()
68 	dev_dbg(&dev->dev, "setting duty cycle: %u\n", duty_cycle);  in loop_set_tx_duty_cycle()
69 	lodev->txduty = duty_cycle;  in loop_set_tx_duty_cycle()
73 static int loop_set_rx_carrier_range(struct rc_dev *dev, u32 min, u32 max)  in loop_set_rx_carrier_range()
75 	struct loopback_dev *lodev = dev->priv;  in loop_set_rx_carrier_range()
78 		dev_dbg(&dev->dev, "invalid rx carrier range %u to %u\n", min, max);  in loop_set_rx_carrier_range()
79 		return -EINVAL;  in loop_set_rx_carrier_range()
82 	dev_dbg(&dev->dev, "setting rx carrier range %u to %u\n", min, max);  in loop_set_rx_carrier_range()
83 	lodev->rxcarriermin = min;  in loop_set_rx_carrier_range()
84 	lodev->rxcarriermax = max;  in loop_set_rx_carrier_range()
88 static int loop_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)  in loop_tx_ir()
90 	struct loopback_dev *lodev = dev->priv;  in loop_tx_ir()
95 	if (lodev->txcarrier < lodev->rxcarriermin ||  in loop_tx_ir()
96 	    lodev->txcarrier > lodev->rxcarriermax) {  in loop_tx_ir()
97 		dev_dbg(&dev->dev, "ignoring tx, carrier out of range\n");  in loop_tx_ir()
101 	if (lodev->wideband)  in loop_tx_ir()
106 	if (!(rxmask & lodev->txmask)) {  in loop_tx_ir()
107 		dev_dbg(&dev->dev, "ignoring tx, rx mask mismatch\n");  in loop_tx_ir()
122 	if (lodev->carrierreport) {  in loop_tx_ir()
125 		rawir.carrier = lodev->txcarrier;  in loop_tx_ir()
132 	rawir.duration = dev->timeout;  in loop_tx_ir()
141 static void loop_set_idle(struct rc_dev *dev, bool enable)  in loop_set_idle()  argument
143 	struct loopback_dev *lodev = dev->priv;  in loop_set_idle()
145 	if (lodev->idle != enable) {  in loop_set_idle()
146 		dev_dbg(&dev->dev, "%sing idle mode\n", enable ? "enter" : "exit");  in loop_set_idle()
147 		lodev->idle = enable;  in loop_set_idle()
151 static int loop_set_wideband_receiver(struct rc_dev *dev, int enable)  in loop_set_wideband_receiver()  argument
153 	struct loopback_dev *lodev = dev->priv;  in loop_set_wideband_receiver()
155 	if (lodev->wideband != enable) {  in loop_set_wideband_receiver()
156 		dev_dbg(&dev->dev, "using %sband receiver\n", enable ? "wide" : "narrow");  in loop_set_wideband_receiver()
157 		lodev->wideband = !!enable;  in loop_set_wideband_receiver()
163 static int loop_set_carrier_report(struct rc_dev *dev, int enable)  in loop_set_carrier_report()  argument
165 	struct loopback_dev *lodev = dev->priv;  in loop_set_carrier_report()
167 	if (lodev->carrierreport != enable) {  in loop_set_carrier_report()
168 		dev_dbg(&dev->dev, "%sabling carrier reports\n", enable ? "en" : "dis");  in loop_set_carrier_report()
169 		lodev->carrierreport = !!enable;  in loop_set_carrier_report()
175 static int loop_set_wakeup_filter(struct rc_dev *dev,  in loop_set_wakeup_filter()
178 	static const unsigned int max = 512;  in loop_set_wakeup_filter()
184 	if (!sc->mask)  in loop_set_wakeup_filter()
190 		return -ENOMEM;  in loop_set_wakeup_filter()
192 	ret = ir_raw_encode_scancode(dev->wakeup_protocol, sc->data, raw, max);  in loop_set_wakeup_filter()
194 	if (ret == -ENOBUFS)  in loop_set_wakeup_filter()
210 static int __init loop_init(void)  in loop_init()
217 		return -ENOMEM;  in loop_init()
219 	rc->device_name		= "rc-core loopback device";  in loop_init()
220 	rc->input_phys		= "rc-core/virtual";  in loop_init()
221 	rc->input_id.bustype	= BUS_VIRTUAL;  in loop_init()
222 	rc->input_id.version	= 1;  in loop_init()
223 	rc->driver_name		= DRIVER_NAME;  in loop_init()
224 	rc->map_name		= RC_MAP_EMPTY;  in loop_init()
225 	rc->priv		= &loopdev;  in loop_init()
226 	rc->allowed_protocols	= RC_PROTO_BIT_ALL_IR_DECODER;  in loop_init()
227 	rc->allowed_wakeup_protocols = RC_PROTO_BIT_ALL_IR_ENCODER;  in loop_init()
228 	rc->encode_wakeup	= true;  in loop_init()
229 	rc->timeout		= IR_DEFAULT_TIMEOUT;  in loop_init()
230 	rc->min_timeout		= 1;  in loop_init()
231 	rc->max_timeout		= IR_MAX_TIMEOUT;  in loop_init()
232 	rc->rx_resolution	= 1;  in loop_init()
233 	rc->tx_resolution	= 1;  in loop_init()
234 	rc->s_tx_mask		= loop_set_tx_mask;  in loop_init()
235 	rc->s_tx_carrier	= loop_set_tx_carrier;  in loop_init()
236 	rc->s_tx_duty_cycle	= loop_set_tx_duty_cycle;  in loop_init()
237 	rc->s_rx_carrier_range	= loop_set_rx_carrier_range;  in loop_init()
238 	rc->tx_ir		= loop_tx_ir;  in loop_init()
239 	rc->s_idle		= loop_set_idle;  in loop_init()
240 	rc->s_wideband_receiver	= loop_set_wideband_receiver;  in loop_init()
241 	rc->s_carrier_report	= loop_set_carrier_report;  in loop_init()
242 	rc->s_wakeup_filter	= loop_set_wakeup_filter;  in loop_init()
255 		dev_err(&rc->dev, "rc_dev registration failed\n");  in loop_init()
264 static void __exit loop_exit(void)  in loop_exit()
272 MODULE_DESCRIPTION("Loopback device for rc-core debugging");