blob: d3f85df64bb20ab9489c943a80c9f4a0beea92fe [file] [log] [blame]
Thomas Gleixner8e8e69d2019-05-29 07:17:59 -07001/* SPDX-License-Identifier: GPL-2.0-only */
Mauro Carvalho Chehab446e4a62009-12-11 08:34:07 -03002/*
3 * Remote Controller core header
4 *
Mauro Carvalho Chehab37e59f82014-02-07 08:03:07 -02005 * Copyright (C) 2009-2010 by Mauro Carvalho Chehab
Mauro Carvalho Chehab446e4a62009-12-11 08:34:07 -03006 */
7
Mauro Carvalho Chehabca866742010-11-17 13:53:11 -03008#ifndef _RC_CORE
9#define _RC_CORE
Mauro Carvalho Chehab446e4a62009-12-11 08:34:07 -030010
Mauro Carvalho Chehab446e4a62009-12-11 08:34:07 -030011#include <linux/spinlock.h>
Sean Younga6ddd4f2017-09-26 09:34:47 -040012#include <linux/cdev.h>
Mauro Carvalho Chehaba3572c32010-03-20 20:59:44 -030013#include <linux/kfifo.h>
14#include <linux/time.h>
Mauro Carvalho Chehab9f154782010-03-21 13:00:55 -030015#include <linux/timer.h>
Mauro Carvalho Chehab02858ee2010-04-02 20:01:00 -030016#include <media/rc-map.h>
Mauro Carvalho Chehab446e4a62009-12-11 08:34:07 -030017
Mauro Carvalho Chehab5b6137dc2016-07-17 09:16:57 -030018/**
Mauro Carvalho Chehabf4ab70e2017-09-24 05:24:58 -040019 * enum rc_driver_type - type of the RC driver.
Mauro Carvalho Chehab5b6137dc2016-07-17 09:16:57 -030020 *
Mauro Carvalho Chehabf4ab70e2017-09-24 05:24:58 -040021 * @RC_DRIVER_SCANCODE: Driver or hardware generates a scancode.
Andi Shytid34aee12016-12-16 04:12:15 -020022 * @RC_DRIVER_IR_RAW: Driver or hardware generates pulse/space sequences.
23 * It needs a Infra-Red pulse/space decoder
24 * @RC_DRIVER_IR_RAW_TX: Device transmitter only,
25 * driver requires pulse/space data sequence.
Mauro Carvalho Chehab5b6137dc2016-07-17 09:16:57 -030026 */
Mauro Carvalho Chehab626cf692010-04-06 23:21:46 -030027enum rc_driver_type {
Mauro Carvalho Chehab5b6137dc2016-07-17 09:16:57 -030028 RC_DRIVER_SCANCODE = 0,
29 RC_DRIVER_IR_RAW,
Andi Shytid34aee12016-12-16 04:12:15 -020030 RC_DRIVER_IR_RAW_TX,
Mauro Carvalho Chehab626cf692010-04-06 23:21:46 -030031};
32
Mauro Carvalho Chehab9dfe4e82010-04-04 14:06:55 -030033/**
James Hogan00942d12014-01-17 10:58:49 -030034 * struct rc_scancode_filter - Filter scan codes.
35 * @data: Scancode data to match.
36 * @mask: Mask of bits of scancode to compare.
37 */
38struct rc_scancode_filter {
39 u32 data;
40 u32 mask;
41};
42
43/**
44 * enum rc_filter_type - Filter type constants.
45 * @RC_FILTER_NORMAL: Filter for normal operation.
46 * @RC_FILTER_WAKEUP: Filter for waking from suspend.
47 * @RC_FILTER_MAX: Number of filter types.
48 */
49enum rc_filter_type {
50 RC_FILTER_NORMAL = 0,
51 RC_FILTER_WAKEUP,
52
53 RC_FILTER_MAX
54};
55
56/**
Sean Young7e45d662017-11-02 17:21:13 -040057 * struct lirc_fh - represents an open lirc file
58 * @list: list of open file handles
59 * @rc: rcdev for this lirc chardev
60 * @carrier_low: when setting the carrier range, first the low end must be
61 * set with an ioctl and then the high end with another ioctl
62 * @send_timeout_reports: report timeouts in lirc raw IR.
63 * @rawir: queue for incoming raw IR
64 * @scancodes: queue for incoming decoded scancodes
65 * @wait_poll: poll struct for lirc device
66 * @send_mode: lirc mode for sending, either LIRC_MODE_SCANCODE or
67 * LIRC_MODE_PULSE
68 * @rec_mode: lirc mode for receiving, either LIRC_MODE_SCANCODE or
69 * LIRC_MODE_MODE2
70 */
71struct lirc_fh {
72 struct list_head list;
73 struct rc_dev *rc;
74 int carrier_low;
75 bool send_timeout_reports;
76 DECLARE_KFIFO_PTR(rawir, unsigned int);
77 DECLARE_KFIFO_PTR(scancodes, struct lirc_scancode);
78 wait_queue_head_t wait_poll;
79 u8 send_mode;
80 u8 rec_mode;
81};
82
83/**
David Härdemand8b4b582010-10-29 16:08:23 -030084 * struct rc_dev - represents a remote control device
85 * @dev: driver model's view of this device
Heiner Kallweitddbf7d52016-09-30 17:42:07 -030086 * @managed_alloc: devm_rc_allocate_device was used to create rc_dev
David Härdeman99b0f3c2014-04-04 19:06:06 -030087 * @sysfs_groups: sysfs attribute groups
Sean Young518f4b22017-07-01 12:13:19 -040088 * @device_name: name of the rc child device
David Härdemand8b4b582010-10-29 16:08:23 -030089 * @input_phys: physical path to the input child device
90 * @input_id: id of the input child device (struct input_id)
91 * @driver_name: name of the hardware driver which registered this device
92 * @map_name: name of the default keymap
Mauro Carvalho Chehabb088ba62010-11-17 14:28:27 -030093 * @rc_map: current scan/key table
Jarod Wilson08aeb7c2011-05-11 15:14:31 -030094 * @lock: used to ensure we've filled in all protocol details before
95 * anyone can call show_protocols or store_protocols
David Härdemanfcb13092015-05-19 19:03:17 -030096 * @minor: unique minor remote control device number
David Härdemand8b4b582010-10-29 16:08:23 -030097 * @raw: additional data for raw pulse/space devices
98 * @input_dev: the input child device used to communicate events to userspace
Jarod Wilson08aeb7c2011-05-11 15:14:31 -030099 * @driver_type: specifies if protocol decoding is done in hardware or software
David Härdemand8b4b582010-10-29 16:08:23 -0300100 * @idle: used to keep track of RX state
James Hoganf423ccc2015-03-31 14:48:10 -0300101 * @encode_wakeup: wakeup filtering uses IR encode API, therefore the allowed
102 * wakeup protocols is the set of all raw encoders
Sean Young6d741bf2017-08-07 16:20:58 -0400103 * @allowed_protocols: bitmask with the supported RC_PROTO_BIT_* protocols
104 * @enabled_protocols: bitmask with the enabled RC_PROTO_BIT_* protocols
105 * @allowed_wakeup_protocols: bitmask with the supported RC_PROTO_BIT_* wakeup
106 * protocols
107 * @wakeup_protocol: the enabled RC_PROTO_* wakeup protocol or
108 * RC_PROTO_UNKNOWN if disabled.
David Härdemanc5540fb2014-04-03 20:32:21 -0300109 * @scancode_filter: scancode filter
110 * @scancode_wakeup_filter: scancode wakeup filters
David Härdeman9d2f1d32014-04-03 20:32:26 -0300111 * @scancode_mask: some hardware decoders are not capable of providing the full
Mauro Carvalho Chehab9dfe4e82010-04-04 14:06:55 -0300112 * scancode to the application. As this is a hardware limit, we can't do
113 * anything with it. Yet, as the same keycode table can be used with other
114 * devices, a mask is provided to allow its usage. Drivers should generally
115 * leave this field in blank
David Härdeman9d2f1d32014-04-03 20:32:26 -0300116 * @users: number of current users of the device
David Härdemand8b4b582010-10-29 16:08:23 -0300117 * @priv: driver-specific data
118 * @keylock: protects the remaining members of the struct
119 * @keypressed: whether a key is currently pressed
120 * @keyup_jiffies: time (in jiffies) when the current keypress should be released
121 * @timer_keyup: timer for releasing a keypress
Sean Young57c642c2017-11-23 17:37:10 -0500122 * @timer_repeat: timer for autorepeat events. This is needed for CEC, which
123 * has non-standard repeats.
David Härdemand8b4b582010-10-29 16:08:23 -0300124 * @last_keycode: keycode of last keypress
David Härdeman120703f2014-04-03 20:31:30 -0300125 * @last_protocol: protocol of last keypress
David Härdemand8b4b582010-10-29 16:08:23 -0300126 * @last_scancode: scancode of last keypress
127 * @last_toggle: toggle value of last command
Maxim Levitsky4a702eb2010-07-31 11:59:22 -0300128 * @timeout: optional time after which device stops sending data
129 * @min_timeout: minimum timeout supported by device
130 * @max_timeout: maximum timeout supported by device
Maxim Levitskye5893332010-07-31 11:59:23 -0300131 * @rx_resolution : resolution (in ns) of input sampler
132 * @tx_resolution: resolution (in ns) of output sampler
Sean Younga6ddd4f2017-09-26 09:34:47 -0400133 * @lirc_dev: lirc device
134 * @lirc_cdev: lirc char cdev
Sean Younga60d64b2017-09-23 10:41:13 -0400135 * @gap_start: time when gap starts
136 * @gap_duration: duration of initial gap
137 * @gap: true if we're in a gap
Sean Young7e45d662017-11-02 17:21:13 -0400138 * @lirc_fh_lock: protects lirc_fh list
139 * @lirc_fh: list of open files
Sean Young7790e812017-09-26 07:31:29 -0400140 * @registered: set to true by rc_register_device(), false by
141 * rc_unregister_device
Mauro Carvalho Chehab9dfe4e82010-04-04 14:06:55 -0300142 * @change_protocol: allow changing the protocol used on hardware decoders
143 * @open: callback to allow drivers to enable polling/irq when IR input device
144 * is opened.
145 * @close: callback to allow drivers to disable polling/irq when IR input device
146 * is opened.
Jarod Wilson9b7c54d2010-06-16 17:55:25 -0300147 * @s_tx_mask: set transmitter mask (for devices with multiple tx outputs)
148 * @s_tx_carrier: set transmit carrier frequency
Maxim Levitskye5893332010-07-31 11:59:23 -0300149 * @s_tx_duty_cycle: set transmit duty cycle (0% - 100%)
Mauro Carvalho Chehabfa810842015-08-22 05:25:45 -0300150 * @s_rx_carrier_range: inform driver about carrier it is expected to handle
Jarod Wilson9b7c54d2010-06-16 17:55:25 -0300151 * @tx_ir: transmit IR
David Härdemand8b4b582010-10-29 16:08:23 -0300152 * @s_idle: enable/disable hardware idle mode, upon which,
153 * device doesn't interrupt host until it sees IR pulses
Maxim Levitskye5893332010-07-31 11:59:23 -0300154 * @s_learning_mode: enable wide band receiver used for learning
Maxim Levitsky46519182010-10-16 19:56:28 -0300155 * @s_carrier_report: enable carrier reports
David Härdeman120703f2014-04-03 20:31:30 -0300156 * @s_filter: set the scancode filter
Sean Young0751d332016-12-05 17:08:35 -0200157 * @s_wakeup_filter: set the wakeup scancode filter. If the mask is zero
158 * then wakeup should be disabled. wakeup_protocol will be set to
159 * a valid protocol if mask is nonzero.
Sean Young4f253ce2016-07-10 13:34:38 -0300160 * @s_timeout: set hardware timeout in ns
Mauro Carvalho Chehab9dfe4e82010-04-04 14:06:55 -0300161 */
David Härdemand8b4b582010-10-29 16:08:23 -0300162struct rc_dev {
163 struct device dev;
Heiner Kallweitddbf7d52016-09-30 17:42:07 -0300164 bool managed_alloc;
David Härdeman99b0f3c2014-04-04 19:06:06 -0300165 const struct attribute_group *sysfs_groups[5];
Sean Young518f4b22017-07-01 12:13:19 -0400166 const char *device_name;
David Härdemand8b4b582010-10-29 16:08:23 -0300167 const char *input_phys;
168 struct input_id input_id;
Sean Young518f4b22017-07-01 12:13:19 -0400169 const char *driver_name;
David Härdemand8b4b582010-10-29 16:08:23 -0300170 const char *map_name;
Jarod Wilson08aeb7c2011-05-11 15:14:31 -0300171 struct rc_map rc_map;
172 struct mutex lock;
David Härdemanfcb13092015-05-19 19:03:17 -0300173 unsigned int minor;
David Härdemand8b4b582010-10-29 16:08:23 -0300174 struct ir_raw_event_ctrl *raw;
175 struct input_dev *input_dev;
176 enum rc_driver_type driver_type;
Maxim Levitsky4a702eb2010-07-31 11:59:22 -0300177 bool idle;
James Hoganf423ccc2015-03-31 14:48:10 -0300178 bool encode_wakeup;
David Härdemanc5540fb2014-04-03 20:32:21 -0300179 u64 allowed_protocols;
180 u64 enabled_protocols;
181 u64 allowed_wakeup_protocols;
Sean Young6d741bf2017-08-07 16:20:58 -0400182 enum rc_proto wakeup_protocol;
David Härdemanc5540fb2014-04-03 20:32:21 -0300183 struct rc_scancode_filter scancode_filter;
184 struct rc_scancode_filter scancode_wakeup_filter;
David Härdeman9d2f1d32014-04-03 20:32:26 -0300185 u32 scancode_mask;
Srinivas Kandagatla8b2ff322013-07-22 04:22:57 -0300186 u32 users;
David Härdemand8b4b582010-10-29 16:08:23 -0300187 void *priv;
188 spinlock_t keylock;
189 bool keypressed;
190 unsigned long keyup_jiffies;
191 struct timer_list timer_keyup;
Sean Young57c642c2017-11-23 17:37:10 -0500192 struct timer_list timer_repeat;
David Härdemand8b4b582010-10-29 16:08:23 -0300193 u32 last_keycode;
Sean Young6d741bf2017-08-07 16:20:58 -0400194 enum rc_proto last_protocol;
Sean Younge6c6d7d2020-01-17 17:46:36 +0100195 u64 last_scancode;
David Härdemand8b4b582010-10-29 16:08:23 -0300196 u8 last_toggle;
197 u32 timeout;
198 u32 min_timeout;
199 u32 max_timeout;
200 u32 rx_resolution;
201 u32 tx_resolution;
Sean Younga60d64b2017-09-23 10:41:13 -0400202#ifdef CONFIG_LIRC
Sean Younga6ddd4f2017-09-26 09:34:47 -0400203 struct device lirc_dev;
204 struct cdev lirc_cdev;
Sean Younga60d64b2017-09-23 10:41:13 -0400205 ktime_t gap_start;
206 u64 gap_duration;
207 bool gap;
Sean Young7e45d662017-11-02 17:21:13 -0400208 spinlock_t lirc_fh_lock;
209 struct list_head lirc_fh;
Sean Younga60d64b2017-09-23 10:41:13 -0400210#endif
Sean Young7790e812017-09-26 07:31:29 -0400211 bool registered;
Sean Young6d741bf2017-08-07 16:20:58 -0400212 int (*change_protocol)(struct rc_dev *dev, u64 *rc_proto);
David Härdemand8b4b582010-10-29 16:08:23 -0300213 int (*open)(struct rc_dev *dev);
214 void (*close)(struct rc_dev *dev);
215 int (*s_tx_mask)(struct rc_dev *dev, u32 mask);
216 int (*s_tx_carrier)(struct rc_dev *dev, u32 carrier);
217 int (*s_tx_duty_cycle)(struct rc_dev *dev, u32 duty_cycle);
218 int (*s_rx_carrier_range)(struct rc_dev *dev, u32 min, u32 max);
David Härdeman5588dc22011-04-28 12:13:58 -0300219 int (*tx_ir)(struct rc_dev *dev, unsigned *txbuf, unsigned n);
David Härdemand8b4b582010-10-29 16:08:23 -0300220 void (*s_idle)(struct rc_dev *dev, bool enable);
221 int (*s_learning_mode)(struct rc_dev *dev, int enable);
222 int (*s_carrier_report) (struct rc_dev *dev, int enable);
James Hogan00942d12014-01-17 10:58:49 -0300223 int (*s_filter)(struct rc_dev *dev,
James Hogan00942d12014-01-17 10:58:49 -0300224 struct rc_scancode_filter *filter);
David Härdeman23c843b2014-04-04 19:06:01 -0300225 int (*s_wakeup_filter)(struct rc_dev *dev,
226 struct rc_scancode_filter *filter);
Sean Young4f253ce2016-07-10 13:34:38 -0300227 int (*s_timeout)(struct rc_dev *dev,
228 unsigned int timeout);
Mauro Carvalho Chehab75543cc2009-12-11 09:44:23 -0300229};
Mauro Carvalho Chehaba3572c32010-03-20 20:59:44 -0300230
Mauro Carvalho Chehabca866742010-11-17 13:53:11 -0300231#define to_rc_dev(d) container_of(d, struct rc_dev, dev)
232
233/*
234 * From rc-main.c
235 * Those functions can be used on any type of Remote Controller. They
236 * basically creates an input_dev and properly reports the device as a
237 * Remote Controller, at sys/class/rc.
238 */
239
Mauro Carvalho Chehab5b6137dc2016-07-17 09:16:57 -0300240/**
241 * rc_allocate_device - Allocates a RC device
242 *
Andi Shyti0f7499f2016-12-16 06:50:58 -0200243 * @rc_driver_type: specifies the type of the RC output to be allocated
Mauro Carvalho Chehab5b6137dc2016-07-17 09:16:57 -0300244 * returns a pointer to struct rc_dev.
245 */
Andi Shyti0f7499f2016-12-16 06:50:58 -0200246struct rc_dev *rc_allocate_device(enum rc_driver_type);
Mauro Carvalho Chehab5b6137dc2016-07-17 09:16:57 -0300247
248/**
Heiner Kallweitddbf7d52016-09-30 17:42:07 -0300249 * devm_rc_allocate_device - Managed RC device allocation
250 *
251 * @dev: pointer to struct device
Andi Shyti0f7499f2016-12-16 06:50:58 -0200252 * @rc_driver_type: specifies the type of the RC output to be allocated
Heiner Kallweitddbf7d52016-09-30 17:42:07 -0300253 * returns a pointer to struct rc_dev.
254 */
Andi Shyti0f7499f2016-12-16 06:50:58 -0200255struct rc_dev *devm_rc_allocate_device(struct device *dev, enum rc_driver_type);
Heiner Kallweitddbf7d52016-09-30 17:42:07 -0300256
257/**
Mauro Carvalho Chehab5b6137dc2016-07-17 09:16:57 -0300258 * rc_free_device - Frees a RC device
259 *
260 * @dev: pointer to struct rc_dev.
261 */
Mauro Carvalho Chehabca866742010-11-17 13:53:11 -0300262void rc_free_device(struct rc_dev *dev);
Mauro Carvalho Chehab5b6137dc2016-07-17 09:16:57 -0300263
264/**
265 * rc_register_device - Registers a RC device
266 *
267 * @dev: pointer to struct rc_dev.
268 */
Mauro Carvalho Chehabca866742010-11-17 13:53:11 -0300269int rc_register_device(struct rc_dev *dev);
Mauro Carvalho Chehab5b6137dc2016-07-17 09:16:57 -0300270
271/**
Heiner Kallweitddbf7d52016-09-30 17:42:07 -0300272 * devm_rc_register_device - Manageded registering of a RC device
273 *
274 * @parent: pointer to struct device.
275 * @dev: pointer to struct rc_dev.
276 */
277int devm_rc_register_device(struct device *parent, struct rc_dev *dev);
278
279/**
Mauro Carvalho Chehab5b6137dc2016-07-17 09:16:57 -0300280 * rc_unregister_device - Unregisters a RC device
281 *
282 * @dev: pointer to struct rc_dev.
283 */
Mauro Carvalho Chehabca866742010-11-17 13:53:11 -0300284void rc_unregister_device(struct rc_dev *dev);
285
286void rc_repeat(struct rc_dev *dev);
Sean Younge6c6d7d2020-01-17 17:46:36 +0100287void rc_keydown(struct rc_dev *dev, enum rc_proto protocol, u64 scancode,
Sean Young6d741bf2017-08-07 16:20:58 -0400288 u8 toggle);
289void rc_keydown_notimeout(struct rc_dev *dev, enum rc_proto protocol,
Sean Younge6c6d7d2020-01-17 17:46:36 +0100290 u64 scancode, u8 toggle);
Mauro Carvalho Chehabca866742010-11-17 13:53:11 -0300291void rc_keyup(struct rc_dev *dev);
Sean Younge6c6d7d2020-01-17 17:46:36 +0100292u32 rc_g_keycode_from_table(struct rc_dev *dev, u64 scancode);
Mauro Carvalho Chehabca866742010-11-17 13:53:11 -0300293
294/*
295 * From rc-raw.c
296 * The Raw interface is specific to InfraRed. It may be a good idea to
297 * split it later into a separate header.
298 */
David Härdemane40b1122010-04-15 18:46:00 -0300299struct ir_raw_event {
Maxim Levitsky46519182010-10-16 19:56:28 -0300300 union {
301 u32 duration;
Heiner Kallweit5f61ff82016-03-17 16:39:13 -0300302 u32 carrier;
Maxim Levitsky46519182010-10-16 19:56:28 -0300303 };
Heiner Kallweit5f61ff82016-03-17 16:39:13 -0300304 u8 duty_cycle;
Maxim Levitsky46519182010-10-16 19:56:28 -0300305
306 unsigned pulse:1;
307 unsigned reset:1;
308 unsigned timeout:1;
309 unsigned carrier_report:1;
David Härdemane40b1122010-04-15 18:46:00 -0300310};
Mauro Carvalho Chehaba3572c32010-03-20 20:59:44 -0300311
Eric Nelsonc8e1bbc2015-10-03 08:18:50 -0700312#define IR_DEFAULT_TIMEOUT MS_TO_NS(125)
Mauro Carvalho Chehab6b20cf32015-06-05 10:30:44 -0300313#define IR_MAX_DURATION 500000000 /* 500 ms */
Jarod Wilson5aad7242011-01-06 16:59:36 -0300314#define US_TO_NS(usec) ((usec) * 1000)
315#define MS_TO_US(msec) ((msec) * 1000)
316#define MS_TO_NS(msec) ((msec) * 1000 * 1000)
David Härdemane40b1122010-04-15 18:46:00 -0300317
David Härdemand8b4b582010-10-29 16:08:23 -0300318void ir_raw_event_handle(struct rc_dev *dev);
319int ir_raw_event_store(struct rc_dev *dev, struct ir_raw_event *ev);
Sean Young86fe1ac2017-08-07 08:38:10 -0400320int ir_raw_event_store_edge(struct rc_dev *dev, bool pulse);
David Härdemand8b4b582010-10-29 16:08:23 -0300321int ir_raw_event_store_with_filter(struct rc_dev *dev,
Sean Young8d7a77c2018-03-08 09:42:44 -0500322 struct ir_raw_event *ev);
323int ir_raw_event_store_with_timeout(struct rc_dev *dev,
324 struct ir_raw_event *ev);
David Härdemand8b4b582010-10-29 16:08:23 -0300325void ir_raw_event_set_idle(struct rc_dev *dev, bool idle);
Sean Young6d741bf2017-08-07 16:20:58 -0400326int ir_raw_encode_scancode(enum rc_proto protocol, u32 scancode,
James Hogan3875233d2015-03-31 14:48:06 -0300327 struct ir_raw_event *events, unsigned int max);
Sean Youngcdfaa012017-02-25 06:51:30 -0500328int ir_raw_encode_carrier(enum rc_proto protocol);
David Härdemand8b4b582010-10-29 16:08:23 -0300329
330static inline void ir_raw_event_reset(struct rc_dev *dev)
David Härdemane40b1122010-04-15 18:46:00 -0300331{
Sean Young183e19f2018-08-21 15:57:52 -0400332 ir_raw_event_store(dev, &((struct ir_raw_event) { .reset = true }));
Sean Younge0d51e62018-05-10 16:41:15 -0400333 dev->idle = true;
David Härdemand8b4b582010-10-29 16:08:23 -0300334 ir_raw_event_handle(dev);
David Härdemane40b1122010-04-15 18:46:00 -0300335}
David Härdeman724e2492010-04-08 13:10:00 -0300336
David Härdeman3ffea492010-10-29 16:08:12 -0300337/* extract mask bits out of data and pack them into the result */
338static inline u32 ir_extract_bits(u32 data, u32 mask)
339{
340 u32 vbit = 1, value = 0;
341
342 do {
David Härdeman829ba9f2010-11-19 20:43:27 -0300343 if (mask & 1) {
344 if (data & 1)
345 value |= vbit;
346 vbit <<= 1;
347 }
348 data >>= 1;
David Härdeman3ffea492010-10-29 16:08:12 -0300349 } while (mask >>= 1);
350
351 return value;
352}
353
Shawn Guoe8ffda72017-07-30 09:23:11 -0400354/* Get NEC scancode and protocol type from address and command bytes */
355static inline u32 ir_nec_bytes_to_scancode(u8 address, u8 not_address,
356 u8 command, u8 not_command,
Sean Young6d741bf2017-08-07 16:20:58 -0400357 enum rc_proto *protocol)
Shawn Guoe8ffda72017-07-30 09:23:11 -0400358{
359 u32 scancode;
360
361 if ((command ^ not_command) != 0xff) {
362 /* NEC transport, but modified protocol, used by at
363 * least Apple and TiVo remotes
364 */
365 scancode = not_address << 24 |
366 address << 16 |
367 not_command << 8 |
368 command;
Sean Young6d741bf2017-08-07 16:20:58 -0400369 *protocol = RC_PROTO_NEC32;
Shawn Guoe8ffda72017-07-30 09:23:11 -0400370 } else if ((address ^ not_address) != 0xff) {
371 /* Extended NEC */
372 scancode = address << 16 |
373 not_address << 8 |
374 command;
Sean Young6d741bf2017-08-07 16:20:58 -0400375 *protocol = RC_PROTO_NECX;
Shawn Guoe8ffda72017-07-30 09:23:11 -0400376 } else {
377 /* Normal NEC */
378 scancode = address << 8 | command;
Sean Young6d741bf2017-08-07 16:20:58 -0400379 *protocol = RC_PROTO_NEC;
Shawn Guoe8ffda72017-07-30 09:23:11 -0400380 }
381
382 return scancode;
383}
384
Mauro Carvalho Chehabca866742010-11-17 13:53:11 -0300385#endif /* _RC_CORE */