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351 lines
9.0 KiB
351 lines
9.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Remote Controller core raw events header |
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* |
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* Copyright (C) 2010 by Mauro Carvalho Chehab |
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*/ |
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#ifndef _RC_CORE_PRIV |
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#define _RC_CORE_PRIV |
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#define RC_DEV_MAX 256 |
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/* Define the max number of pulse/space transitions to buffer */ |
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#define MAX_IR_EVENT_SIZE 512 |
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#include <linux/slab.h> |
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#include <uapi/linux/bpf.h> |
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#include <media/rc-core.h> |
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/** |
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* rc_open - Opens a RC device |
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* |
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* @rdev: pointer to struct rc_dev. |
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*/ |
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int rc_open(struct rc_dev *rdev); |
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/** |
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* rc_close - Closes a RC device |
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* |
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* @rdev: pointer to struct rc_dev. |
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*/ |
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void rc_close(struct rc_dev *rdev); |
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struct ir_raw_handler { |
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struct list_head list; |
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u64 protocols; /* which are handled by this handler */ |
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int (*decode)(struct rc_dev *dev, struct ir_raw_event event); |
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int (*encode)(enum rc_proto protocol, u32 scancode, |
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struct ir_raw_event *events, unsigned int max); |
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u32 carrier; |
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u32 min_timeout; |
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/* These two should only be used by the mce kbd decoder */ |
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int (*raw_register)(struct rc_dev *dev); |
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int (*raw_unregister)(struct rc_dev *dev); |
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}; |
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struct ir_raw_event_ctrl { |
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struct list_head list; /* to keep track of raw clients */ |
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struct task_struct *thread; |
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/* fifo for the pulse/space durations */ |
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DECLARE_KFIFO(kfifo, struct ir_raw_event, MAX_IR_EVENT_SIZE); |
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ktime_t last_event; /* when last event occurred */ |
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struct rc_dev *dev; /* pointer to the parent rc_dev */ |
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/* handle delayed ir_raw_event_store_edge processing */ |
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spinlock_t edge_spinlock; |
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struct timer_list edge_handle; |
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/* raw decoder state follows */ |
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struct ir_raw_event prev_ev; |
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struct ir_raw_event this_ev; |
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#ifdef CONFIG_BPF_LIRC_MODE2 |
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u32 bpf_sample; |
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struct bpf_prog_array __rcu *progs; |
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#endif |
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#if IS_ENABLED(CONFIG_IR_NEC_DECODER) |
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struct nec_dec { |
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int state; |
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unsigned count; |
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u32 bits; |
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bool is_nec_x; |
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bool necx_repeat; |
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} nec; |
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#endif |
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#if IS_ENABLED(CONFIG_IR_RC5_DECODER) |
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struct rc5_dec { |
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int state; |
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u32 bits; |
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unsigned count; |
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bool is_rc5x; |
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} rc5; |
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#endif |
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#if IS_ENABLED(CONFIG_IR_RC6_DECODER) |
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struct rc6_dec { |
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int state; |
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u8 header; |
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u32 body; |
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bool toggle; |
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unsigned count; |
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unsigned wanted_bits; |
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} rc6; |
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#endif |
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#if IS_ENABLED(CONFIG_IR_SONY_DECODER) |
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struct sony_dec { |
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int state; |
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u32 bits; |
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unsigned count; |
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} sony; |
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#endif |
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#if IS_ENABLED(CONFIG_IR_JVC_DECODER) |
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struct jvc_dec { |
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int state; |
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u16 bits; |
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u16 old_bits; |
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unsigned count; |
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bool first; |
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bool toggle; |
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} jvc; |
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#endif |
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#if IS_ENABLED(CONFIG_IR_SANYO_DECODER) |
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struct sanyo_dec { |
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int state; |
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unsigned count; |
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u64 bits; |
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} sanyo; |
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#endif |
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#if IS_ENABLED(CONFIG_IR_SHARP_DECODER) |
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struct sharp_dec { |
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int state; |
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unsigned count; |
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u32 bits; |
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unsigned int pulse_len; |
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} sharp; |
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#endif |
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#if IS_ENABLED(CONFIG_IR_MCE_KBD_DECODER) |
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struct mce_kbd_dec { |
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/* locks key up timer */ |
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spinlock_t keylock; |
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struct timer_list rx_timeout; |
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int state; |
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u8 header; |
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u32 body; |
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unsigned count; |
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unsigned wanted_bits; |
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} mce_kbd; |
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#endif |
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#if IS_ENABLED(CONFIG_IR_XMP_DECODER) |
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struct xmp_dec { |
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int state; |
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unsigned count; |
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u32 durations[16]; |
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} xmp; |
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#endif |
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#if IS_ENABLED(CONFIG_IR_IMON_DECODER) |
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struct imon_dec { |
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int state; |
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int count; |
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int last_chk; |
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unsigned int bits; |
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bool stick_keyboard; |
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} imon; |
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#endif |
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#if IS_ENABLED(CONFIG_IR_RCMM_DECODER) |
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struct rcmm_dec { |
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int state; |
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unsigned int count; |
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u32 bits; |
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} rcmm; |
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#endif |
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}; |
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/* Mutex for locking raw IR processing and handler change */ |
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extern struct mutex ir_raw_handler_lock; |
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/* macros for IR decoders */ |
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static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin) |
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{ |
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return d1 > (d2 - margin); |
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} |
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static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin) |
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{ |
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return ((d1 > (d2 - margin)) && (d1 < (d2 + margin))); |
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} |
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static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y) |
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{ |
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return x->pulse != y->pulse; |
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} |
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static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration) |
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{ |
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if (duration > ev->duration) |
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ev->duration = 0; |
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else |
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ev->duration -= duration; |
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} |
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/* Returns true if event is normal pulse/space event */ |
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static inline bool is_timing_event(struct ir_raw_event ev) |
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{ |
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return !ev.carrier_report && !ev.reset; |
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} |
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#define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space") |
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/* functions for IR encoders */ |
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bool rc_validate_scancode(enum rc_proto proto, u32 scancode); |
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static inline void init_ir_raw_event_duration(struct ir_raw_event *ev, |
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unsigned int pulse, |
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u32 duration) |
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{ |
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*ev = (struct ir_raw_event) { |
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.duration = duration, |
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.pulse = pulse |
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}; |
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} |
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/** |
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* struct ir_raw_timings_manchester - Manchester coding timings |
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* @leader_pulse: duration of leader pulse (if any) 0 if continuing |
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* existing signal |
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* @leader_space: duration of leader space (if any) |
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* @clock: duration of each pulse/space in ns |
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* @invert: if set clock logic is inverted |
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* (0 = space + pulse, 1 = pulse + space) |
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* @trailer_space: duration of trailer space in ns |
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*/ |
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struct ir_raw_timings_manchester { |
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unsigned int leader_pulse; |
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unsigned int leader_space; |
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unsigned int clock; |
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unsigned int invert:1; |
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unsigned int trailer_space; |
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}; |
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int ir_raw_gen_manchester(struct ir_raw_event **ev, unsigned int max, |
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const struct ir_raw_timings_manchester *timings, |
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unsigned int n, u64 data); |
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/** |
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* ir_raw_gen_pulse_space() - generate pulse and space raw events. |
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* @ev: Pointer to pointer to next free raw event. |
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* Will be incremented for each raw event written. |
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* @max: Pointer to number of raw events available in buffer. |
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* Will be decremented for each raw event written. |
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* @pulse_width: Width of pulse in ns. |
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* @space_width: Width of space in ns. |
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* |
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* Returns: 0 on success. |
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* -ENOBUFS if there isn't enough buffer space to write both raw |
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* events. In this case @max events will have been written. |
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*/ |
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static inline int ir_raw_gen_pulse_space(struct ir_raw_event **ev, |
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unsigned int *max, |
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unsigned int pulse_width, |
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unsigned int space_width) |
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{ |
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if (!*max) |
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return -ENOBUFS; |
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init_ir_raw_event_duration((*ev)++, 1, pulse_width); |
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if (!--*max) |
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return -ENOBUFS; |
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init_ir_raw_event_duration((*ev)++, 0, space_width); |
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--*max; |
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return 0; |
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} |
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/** |
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* struct ir_raw_timings_pd - pulse-distance modulation timings |
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* @header_pulse: duration of header pulse in ns (0 for none) |
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* @header_space: duration of header space in ns |
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* @bit_pulse: duration of bit pulse in ns |
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* @bit_space: duration of bit space (for logic 0 and 1) in ns |
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* @trailer_pulse: duration of trailer pulse in ns |
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* @trailer_space: duration of trailer space in ns |
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* @msb_first: 1 if most significant bit is sent first |
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*/ |
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struct ir_raw_timings_pd { |
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unsigned int header_pulse; |
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unsigned int header_space; |
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unsigned int bit_pulse; |
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unsigned int bit_space[2]; |
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unsigned int trailer_pulse; |
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unsigned int trailer_space; |
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unsigned int msb_first:1; |
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}; |
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int ir_raw_gen_pd(struct ir_raw_event **ev, unsigned int max, |
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const struct ir_raw_timings_pd *timings, |
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unsigned int n, u64 data); |
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/** |
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* struct ir_raw_timings_pl - pulse-length modulation timings |
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* @header_pulse: duration of header pulse in ns (0 for none) |
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* @bit_space: duration of bit space in ns |
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* @bit_pulse: duration of bit pulse (for logic 0 and 1) in ns |
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* @trailer_space: duration of trailer space in ns |
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* @msb_first: 1 if most significant bit is sent first |
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*/ |
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struct ir_raw_timings_pl { |
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unsigned int header_pulse; |
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unsigned int bit_space; |
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unsigned int bit_pulse[2]; |
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unsigned int trailer_space; |
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unsigned int msb_first:1; |
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}; |
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int ir_raw_gen_pl(struct ir_raw_event **ev, unsigned int max, |
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const struct ir_raw_timings_pl *timings, |
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unsigned int n, u64 data); |
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/* |
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* Routines from rc-raw.c to be used internally and by decoders |
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*/ |
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u64 ir_raw_get_allowed_protocols(void); |
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int ir_raw_event_prepare(struct rc_dev *dev); |
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int ir_raw_event_register(struct rc_dev *dev); |
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void ir_raw_event_free(struct rc_dev *dev); |
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void ir_raw_event_unregister(struct rc_dev *dev); |
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int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler); |
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void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler); |
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void ir_raw_load_modules(u64 *protocols); |
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void ir_raw_init(void); |
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/* |
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* lirc interface |
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*/ |
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#ifdef CONFIG_LIRC |
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int lirc_dev_init(void); |
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void lirc_dev_exit(void); |
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void lirc_raw_event(struct rc_dev *dev, struct ir_raw_event ev); |
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void lirc_scancode_event(struct rc_dev *dev, struct lirc_scancode *lsc); |
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int lirc_register(struct rc_dev *dev); |
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void lirc_unregister(struct rc_dev *dev); |
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struct rc_dev *rc_dev_get_from_fd(int fd); |
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#else |
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static inline int lirc_dev_init(void) { return 0; } |
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static inline void lirc_dev_exit(void) {} |
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static inline void lirc_raw_event(struct rc_dev *dev, |
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struct ir_raw_event ev) { } |
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static inline void lirc_scancode_event(struct rc_dev *dev, |
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struct lirc_scancode *lsc) { } |
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static inline int lirc_register(struct rc_dev *dev) { return 0; } |
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static inline void lirc_unregister(struct rc_dev *dev) { } |
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#endif |
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/* |
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* bpf interface |
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*/ |
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#ifdef CONFIG_BPF_LIRC_MODE2 |
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void lirc_bpf_free(struct rc_dev *dev); |
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void lirc_bpf_run(struct rc_dev *dev, u32 sample); |
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#else |
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static inline void lirc_bpf_free(struct rc_dev *dev) { } |
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static inline void lirc_bpf_run(struct rc_dev *dev, u32 sample) { } |
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#endif |
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#endif /* _RC_CORE_PRIV */
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