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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /include/media/rc-core.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/media/rc-core.h')
-rw-r--r--include/media/rc-core.h379
1 files changed, 379 insertions, 0 deletions
diff --git a/include/media/rc-core.h b/include/media/rc-core.h
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+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Remote Controller core header
+ *
+ * Copyright (C) 2009-2010 by Mauro Carvalho Chehab
+ */
+
+#ifndef _RC_CORE
+#define _RC_CORE
+
+#include <linux/spinlock.h>
+#include <linux/cdev.h>
+#include <linux/kfifo.h>
+#include <linux/time.h>
+#include <linux/timer.h>
+#include <media/rc-map.h>
+
+/**
+ * enum rc_driver_type - type of the RC driver.
+ *
+ * @RC_DRIVER_SCANCODE: Driver or hardware generates a scancode.
+ * @RC_DRIVER_IR_RAW: Driver or hardware generates pulse/space sequences.
+ * It needs a Infra-Red pulse/space decoder
+ * @RC_DRIVER_IR_RAW_TX: Device transmitter only,
+ * driver requires pulse/space data sequence.
+ */
+enum rc_driver_type {
+ RC_DRIVER_SCANCODE = 0,
+ RC_DRIVER_IR_RAW,
+ RC_DRIVER_IR_RAW_TX,
+};
+
+/**
+ * struct rc_scancode_filter - Filter scan codes.
+ * @data: Scancode data to match.
+ * @mask: Mask of bits of scancode to compare.
+ */
+struct rc_scancode_filter {
+ u32 data;
+ u32 mask;
+};
+
+/**
+ * enum rc_filter_type - Filter type constants.
+ * @RC_FILTER_NORMAL: Filter for normal operation.
+ * @RC_FILTER_WAKEUP: Filter for waking from suspend.
+ * @RC_FILTER_MAX: Number of filter types.
+ */
+enum rc_filter_type {
+ RC_FILTER_NORMAL = 0,
+ RC_FILTER_WAKEUP,
+
+ RC_FILTER_MAX
+};
+
+/**
+ * struct lirc_fh - represents an open lirc file
+ * @list: list of open file handles
+ * @rc: rcdev for this lirc chardev
+ * @carrier_low: when setting the carrier range, first the low end must be
+ * set with an ioctl and then the high end with another ioctl
+ * @rawir: queue for incoming raw IR
+ * @scancodes: queue for incoming decoded scancodes
+ * @wait_poll: poll struct for lirc device
+ * @send_mode: lirc mode for sending, either LIRC_MODE_SCANCODE or
+ * LIRC_MODE_PULSE
+ * @rec_mode: lirc mode for receiving, either LIRC_MODE_SCANCODE or
+ * LIRC_MODE_MODE2
+ */
+struct lirc_fh {
+ struct list_head list;
+ struct rc_dev *rc;
+ int carrier_low;
+ DECLARE_KFIFO_PTR(rawir, unsigned int);
+ DECLARE_KFIFO_PTR(scancodes, struct lirc_scancode);
+ wait_queue_head_t wait_poll;
+ u8 send_mode;
+ u8 rec_mode;
+};
+
+/**
+ * struct rc_dev - represents a remote control device
+ * @dev: driver model's view of this device
+ * @managed_alloc: devm_rc_allocate_device was used to create rc_dev
+ * @sysfs_groups: sysfs attribute groups
+ * @device_name: name of the rc child device
+ * @input_phys: physical path to the input child device
+ * @input_id: id of the input child device (struct input_id)
+ * @driver_name: name of the hardware driver which registered this device
+ * @map_name: name of the default keymap
+ * @rc_map: current scan/key table
+ * @lock: used to ensure we've filled in all protocol details before
+ * anyone can call show_protocols or store_protocols
+ * @minor: unique minor remote control device number
+ * @raw: additional data for raw pulse/space devices
+ * @input_dev: the input child device used to communicate events to userspace
+ * @driver_type: specifies if protocol decoding is done in hardware or software
+ * @idle: used to keep track of RX state
+ * @encode_wakeup: wakeup filtering uses IR encode API, therefore the allowed
+ * wakeup protocols is the set of all raw encoders
+ * @allowed_protocols: bitmask with the supported RC_PROTO_BIT_* protocols
+ * @enabled_protocols: bitmask with the enabled RC_PROTO_BIT_* protocols
+ * @allowed_wakeup_protocols: bitmask with the supported RC_PROTO_BIT_* wakeup
+ * protocols
+ * @wakeup_protocol: the enabled RC_PROTO_* wakeup protocol or
+ * RC_PROTO_UNKNOWN if disabled.
+ * @scancode_filter: scancode filter
+ * @scancode_wakeup_filter: scancode wakeup filters
+ * @scancode_mask: some hardware decoders are not capable of providing the full
+ * scancode to the application. As this is a hardware limit, we can't do
+ * anything with it. Yet, as the same keycode table can be used with other
+ * devices, a mask is provided to allow its usage. Drivers should generally
+ * leave this field in blank
+ * @users: number of current users of the device
+ * @priv: driver-specific data
+ * @keylock: protects the remaining members of the struct
+ * @keypressed: whether a key is currently pressed
+ * @keyup_jiffies: time (in jiffies) when the current keypress should be released
+ * @timer_keyup: timer for releasing a keypress
+ * @timer_repeat: timer for autorepeat events. This is needed for CEC, which
+ * has non-standard repeats.
+ * @last_keycode: keycode of last keypress
+ * @last_protocol: protocol of last keypress
+ * @last_scancode: scancode of last keypress
+ * @last_toggle: toggle value of last command
+ * @timeout: optional time after which device stops sending data
+ * @min_timeout: minimum timeout supported by device
+ * @max_timeout: maximum timeout supported by device
+ * @rx_resolution : resolution (in us) of input sampler
+ * @tx_resolution: resolution (in us) of output sampler
+ * @lirc_dev: lirc device
+ * @lirc_cdev: lirc char cdev
+ * @gap_start: start time for gap after timeout if non-zero
+ * @lirc_fh_lock: protects lirc_fh list
+ * @lirc_fh: list of open files
+ * @registered: set to true by rc_register_device(), false by
+ * rc_unregister_device
+ * @change_protocol: allow changing the protocol used on hardware decoders
+ * @open: callback to allow drivers to enable polling/irq when IR input device
+ * is opened.
+ * @close: callback to allow drivers to disable polling/irq when IR input device
+ * is opened.
+ * @s_tx_mask: set transmitter mask (for devices with multiple tx outputs)
+ * @s_tx_carrier: set transmit carrier frequency
+ * @s_tx_duty_cycle: set transmit duty cycle (0% - 100%)
+ * @s_rx_carrier_range: inform driver about carrier it is expected to handle
+ * @tx_ir: transmit IR
+ * @s_idle: enable/disable hardware idle mode, upon which,
+ * device doesn't interrupt host until it sees IR pulses
+ * @s_wideband_receiver: enable wide band receiver used for learning
+ * @s_carrier_report: enable carrier reports
+ * @s_filter: set the scancode filter
+ * @s_wakeup_filter: set the wakeup scancode filter. If the mask is zero
+ * then wakeup should be disabled. wakeup_protocol will be set to
+ * a valid protocol if mask is nonzero.
+ * @s_timeout: set hardware timeout in us
+ */
+struct rc_dev {
+ struct device dev;
+ bool managed_alloc;
+ const struct attribute_group *sysfs_groups[5];
+ const char *device_name;
+ const char *input_phys;
+ struct input_id input_id;
+ const char *driver_name;
+ const char *map_name;
+ struct rc_map rc_map;
+ struct mutex lock;
+ unsigned int minor;
+ struct ir_raw_event_ctrl *raw;
+ struct input_dev *input_dev;
+ enum rc_driver_type driver_type;
+ bool idle;
+ bool encode_wakeup;
+ u64 allowed_protocols;
+ u64 enabled_protocols;
+ u64 allowed_wakeup_protocols;
+ enum rc_proto wakeup_protocol;
+ struct rc_scancode_filter scancode_filter;
+ struct rc_scancode_filter scancode_wakeup_filter;
+ u32 scancode_mask;
+ u32 users;
+ void *priv;
+ spinlock_t keylock;
+ bool keypressed;
+ unsigned long keyup_jiffies;
+ struct timer_list timer_keyup;
+ struct timer_list timer_repeat;
+ u32 last_keycode;
+ enum rc_proto last_protocol;
+ u64 last_scancode;
+ u8 last_toggle;
+ u32 timeout;
+ u32 min_timeout;
+ u32 max_timeout;
+ u32 rx_resolution;
+ u32 tx_resolution;
+#ifdef CONFIG_LIRC
+ struct device lirc_dev;
+ struct cdev lirc_cdev;
+ ktime_t gap_start;
+ spinlock_t lirc_fh_lock;
+ struct list_head lirc_fh;
+#endif
+ bool registered;
+ int (*change_protocol)(struct rc_dev *dev, u64 *rc_proto);
+ int (*open)(struct rc_dev *dev);
+ void (*close)(struct rc_dev *dev);
+ int (*s_tx_mask)(struct rc_dev *dev, u32 mask);
+ int (*s_tx_carrier)(struct rc_dev *dev, u32 carrier);
+ int (*s_tx_duty_cycle)(struct rc_dev *dev, u32 duty_cycle);
+ int (*s_rx_carrier_range)(struct rc_dev *dev, u32 min, u32 max);
+ int (*tx_ir)(struct rc_dev *dev, unsigned *txbuf, unsigned n);
+ void (*s_idle)(struct rc_dev *dev, bool enable);
+ int (*s_wideband_receiver)(struct rc_dev *dev, int enable);
+ int (*s_carrier_report) (struct rc_dev *dev, int enable);
+ int (*s_filter)(struct rc_dev *dev,
+ struct rc_scancode_filter *filter);
+ int (*s_wakeup_filter)(struct rc_dev *dev,
+ struct rc_scancode_filter *filter);
+ int (*s_timeout)(struct rc_dev *dev,
+ unsigned int timeout);
+};
+
+#define to_rc_dev(d) container_of(d, struct rc_dev, dev)
+
+/*
+ * From rc-main.c
+ * Those functions can be used on any type of Remote Controller. They
+ * basically creates an input_dev and properly reports the device as a
+ * Remote Controller, at sys/class/rc.
+ */
+
+/**
+ * rc_allocate_device - Allocates a RC device
+ *
+ * @rc_driver_type: specifies the type of the RC output to be allocated
+ * returns a pointer to struct rc_dev.
+ */
+struct rc_dev *rc_allocate_device(enum rc_driver_type);
+
+/**
+ * devm_rc_allocate_device - Managed RC device allocation
+ *
+ * @dev: pointer to struct device
+ * @rc_driver_type: specifies the type of the RC output to be allocated
+ * returns a pointer to struct rc_dev.
+ */
+struct rc_dev *devm_rc_allocate_device(struct device *dev, enum rc_driver_type);
+
+/**
+ * rc_free_device - Frees a RC device
+ *
+ * @dev: pointer to struct rc_dev.
+ */
+void rc_free_device(struct rc_dev *dev);
+
+/**
+ * rc_register_device - Registers a RC device
+ *
+ * @dev: pointer to struct rc_dev.
+ */
+int rc_register_device(struct rc_dev *dev);
+
+/**
+ * devm_rc_register_device - Manageded registering of a RC device
+ *
+ * @parent: pointer to struct device.
+ * @dev: pointer to struct rc_dev.
+ */
+int devm_rc_register_device(struct device *parent, struct rc_dev *dev);
+
+/**
+ * rc_unregister_device - Unregisters a RC device
+ *
+ * @dev: pointer to struct rc_dev.
+ */
+void rc_unregister_device(struct rc_dev *dev);
+
+void rc_repeat(struct rc_dev *dev);
+void rc_keydown(struct rc_dev *dev, enum rc_proto protocol, u64 scancode,
+ u8 toggle);
+void rc_keydown_notimeout(struct rc_dev *dev, enum rc_proto protocol,
+ u64 scancode, u8 toggle);
+void rc_keyup(struct rc_dev *dev);
+u32 rc_g_keycode_from_table(struct rc_dev *dev, u64 scancode);
+
+/*
+ * From rc-raw.c
+ * The Raw interface is specific to InfraRed. It may be a good idea to
+ * split it later into a separate header.
+ */
+struct ir_raw_event {
+ union {
+ u32 duration;
+ u32 carrier;
+ };
+ u8 duty_cycle;
+
+ unsigned pulse:1;
+ unsigned overflow:1;
+ unsigned timeout:1;
+ unsigned carrier_report:1;
+};
+
+#define US_TO_NS(usec) ((usec) * 1000)
+#define MS_TO_US(msec) ((msec) * 1000)
+#define IR_MAX_DURATION MS_TO_US(500)
+#define IR_DEFAULT_TIMEOUT MS_TO_US(125)
+#define IR_MAX_TIMEOUT LIRC_VALUE_MASK
+
+void ir_raw_event_handle(struct rc_dev *dev);
+int ir_raw_event_store(struct rc_dev *dev, struct ir_raw_event *ev);
+int ir_raw_event_store_edge(struct rc_dev *dev, bool pulse);
+int ir_raw_event_store_with_filter(struct rc_dev *dev,
+ struct ir_raw_event *ev);
+int ir_raw_event_store_with_timeout(struct rc_dev *dev,
+ struct ir_raw_event *ev);
+void ir_raw_event_set_idle(struct rc_dev *dev, bool idle);
+int ir_raw_encode_scancode(enum rc_proto protocol, u32 scancode,
+ struct ir_raw_event *events, unsigned int max);
+int ir_raw_encode_carrier(enum rc_proto protocol);
+
+static inline void ir_raw_event_overflow(struct rc_dev *dev)
+{
+ ir_raw_event_store(dev, &((struct ir_raw_event) { .overflow = true }));
+ dev->idle = true;
+ ir_raw_event_handle(dev);
+}
+
+/* extract mask bits out of data and pack them into the result */
+static inline u32 ir_extract_bits(u32 data, u32 mask)
+{
+ u32 vbit = 1, value = 0;
+
+ do {
+ if (mask & 1) {
+ if (data & 1)
+ value |= vbit;
+ vbit <<= 1;
+ }
+ data >>= 1;
+ } while (mask >>= 1);
+
+ return value;
+}
+
+/* Get NEC scancode and protocol type from address and command bytes */
+static inline u32 ir_nec_bytes_to_scancode(u8 address, u8 not_address,
+ u8 command, u8 not_command,
+ enum rc_proto *protocol)
+{
+ u32 scancode;
+
+ if ((command ^ not_command) != 0xff) {
+ /* NEC transport, but modified protocol, used by at
+ * least Apple and TiVo remotes
+ */
+ scancode = not_address << 24 |
+ address << 16 |
+ not_command << 8 |
+ command;
+ *protocol = RC_PROTO_NEC32;
+ } else if ((address ^ not_address) != 0xff) {
+ /* Extended NEC */
+ scancode = address << 16 |
+ not_address << 8 |
+ command;
+ *protocol = RC_PROTO_NECX;
+ } else {
+ /* Normal NEC */
+ scancode = address << 8 | command;
+ *protocol = RC_PROTO_NEC;
+ }
+
+ return scancode;
+}
+
+#endif /* _RC_CORE */