| /* 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 |
| * @send_timeout_reports: report timeouts in lirc raw IR. |
| * @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; |
| bool send_timeout_reports; |
| 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 ns) of input sampler |
| * @tx_resolution: resolution (in ns) of output sampler |
| * @lirc_dev: lirc device |
| * @lirc_cdev: lirc char cdev |
| * @gap_start: time when gap starts |
| * @gap_duration: duration of initial gap |
| * @gap: true if we're in a gap |
| * @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_learning_mode: 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 ns |
| */ |
| 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; |
| u64 gap_duration; |
| bool gap; |
| 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_learning_mode)(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 reset:1; |
| unsigned timeout:1; |
| unsigned carrier_report:1; |
| }; |
| |
| #define IR_DEFAULT_TIMEOUT MS_TO_NS(125) |
| #define IR_MAX_DURATION 500000000 /* 500 ms */ |
| #define US_TO_NS(usec) ((usec) * 1000) |
| #define MS_TO_US(msec) ((msec) * 1000) |
| #define MS_TO_NS(msec) ((msec) * 1000 * 1000) |
| |
| 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_reset(struct rc_dev *dev) |
| { |
| ir_raw_event_store(dev, &((struct ir_raw_event) { .reset = 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 */ |
