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// SPDX-License-Identifier: GPL-2.0
// Remote Controller core raw events header
//
// Copyright (C) 2010 by Mauro Carvalho Chehab
#ifndef _RC_CORE_PRIV
#define _RC_CORE_PRIV
/* Define the max number of pulse/space transitions to buffer */
#define MAX_IR_EVENT_SIZE 512
#include <linux/slab.h>
#include <media/rc-core.h>
/**
* rc_open - Opens a RC device
*
* @rdev: pointer to struct rc_dev.
*/
int rc_open(struct rc_dev *rdev);
/**
* rc_close - Closes a RC device
*
* @rdev: pointer to struct rc_dev.
*/
void rc_close(struct rc_dev *rdev);
struct ir_raw_handler {
struct list_head list;
u64 protocols; /* which are handled by this handler */
int (*decode)(struct rc_dev *dev, struct ir_raw_event event);
int (*encode)(enum rc_proto protocol, u32 scancode,
struct ir_raw_event *events, unsigned int max);
u32 carrier;
/* These two should only be used by the mce kbd decoder */
int (*raw_register)(struct rc_dev *dev);
int (*raw_unregister)(struct rc_dev *dev);
};
struct ir_raw_event_ctrl {
struct list_head list; /* to keep track of raw clients */
struct task_struct *thread;
/* fifo for the pulse/space durations */
DECLARE_KFIFO(kfifo, struct ir_raw_event, MAX_IR_EVENT_SIZE);
ktime_t last_event; /* when last event occurred */
struct rc_dev *dev; /* pointer to the parent rc_dev */
/* edge driver */
struct timer_list edge_handle;
/* raw decoder state follows */
struct ir_raw_event prev_ev;
struct ir_raw_event this_ev;
struct nec_dec {
int state;
unsigned count;
u32 bits;
bool is_nec_x;
bool necx_repeat;
} nec;
struct rc5_dec {
int state;
u32 bits;
unsigned count;
bool is_rc5x;
} rc5;
struct rc6_dec {
int state;
u8 header;
u32 body;
bool toggle;
unsigned count;
unsigned wanted_bits;
} rc6;
struct sony_dec {
int state;
u32 bits;
unsigned count;
} sony;
struct jvc_dec {
int state;
u16 bits;
u16 old_bits;
unsigned count;
bool first;
bool toggle;
} jvc;
struct sanyo_dec {
int state;
unsigned count;
u64 bits;
} sanyo;
struct sharp_dec {
int state;
unsigned count;
u32 bits;
unsigned int pulse_len;
} sharp;
struct mce_kbd_dec {
struct input_dev *idev;
struct timer_list rx_timeout;
char name[64];
char phys[64];
int state;
u8 header;
u32 body;
unsigned count;
unsigned wanted_bits;
} mce_kbd;
struct xmp_dec {
int state;
unsigned count;
u32 durations[16];
} xmp;
};
/* macros for IR decoders */
static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
{
return d1 > (d2 - margin);
}
static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
{
return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
}
static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
{
return x->pulse != y->pulse;
}
static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
{
if (duration > ev->duration)
ev->duration = 0;
else
ev->duration -= duration;
}
/* Returns true if event is normal pulse/space event */
static inline bool is_timing_event(struct ir_raw_event ev)
{
return !ev.carrier_report && !ev.reset;
}
#define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000)
#define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
/* functions for IR encoders */
bool rc_validate_scancode(enum rc_proto proto, u32 scancode);
static inline void init_ir_raw_event_duration(struct ir_raw_event *ev,
unsigned int pulse,
u32 duration)
{
init_ir_raw_event(ev);
ev->duration = duration;
ev->pulse = pulse;
}
/**
* struct ir_raw_timings_manchester - Manchester coding timings
* @leader: duration of leader pulse (if any) 0 if continuing
* existing signal (see @pulse_space_start)
* @pulse_space_start: 1 for starting with pulse (0 for starting with space)
* @clock: duration of each pulse/space in ns
* @invert: if set clock logic is inverted
* (0 = space + pulse, 1 = pulse + space)
* @trailer_space: duration of trailer space in ns
*/
struct ir_raw_timings_manchester {
unsigned int leader;
unsigned int pulse_space_start:1;
unsigned int clock;
unsigned int invert:1;
unsigned int trailer_space;
};
int ir_raw_gen_manchester(struct ir_raw_event **ev, unsigned int max,
const struct ir_raw_timings_manchester *timings,
unsigned int n, u64 data);
/**
* ir_raw_gen_pulse_space() - generate pulse and space raw events.
* @ev: Pointer to pointer to next free raw event.
* Will be incremented for each raw event written.
* @max: Pointer to number of raw events available in buffer.
* Will be decremented for each raw event written.
* @pulse_width: Width of pulse in ns.
* @space_width: Width of space in ns.
*
* Returns: 0 on success.
* -ENOBUFS if there isn't enough buffer space to write both raw
* events. In this case @max events will have been written.
*/
static inline int ir_raw_gen_pulse_space(struct ir_raw_event **ev,
unsigned int *max,
unsigned int pulse_width,
unsigned int space_width)
{
if (!*max)
return -ENOBUFS;
init_ir_raw_event_duration((*ev)++, 1, pulse_width);
if (!--*max)
return -ENOBUFS;
init_ir_raw_event_duration((*ev)++, 0, space_width);
--*max;
return 0;
}
/**
* struct ir_raw_timings_pd - pulse-distance modulation timings
* @header_pulse: duration of header pulse in ns (0 for none)
* @header_space: duration of header space in ns
* @bit_pulse: duration of bit pulse in ns
* @bit_space: duration of bit space (for logic 0 and 1) in ns
* @trailer_pulse: duration of trailer pulse in ns
* @trailer_space: duration of trailer space in ns
* @msb_first: 1 if most significant bit is sent first
*/
struct ir_raw_timings_pd {
unsigned int header_pulse;
unsigned int header_space;
unsigned int bit_pulse;
unsigned int bit_space[2];
unsigned int trailer_pulse;
unsigned int trailer_space;
unsigned int msb_first:1;
};
int ir_raw_gen_pd(struct ir_raw_event **ev, unsigned int max,
const struct ir_raw_timings_pd *timings,
unsigned int n, u64 data);
/**
* struct ir_raw_timings_pl - pulse-length modulation timings
* @header_pulse: duration of header pulse in ns (0 for none)
* @bit_space: duration of bit space in ns
* @bit_pulse: duration of bit pulse (for logic 0 and 1) in ns
* @trailer_space: duration of trailer space in ns
* @msb_first: 1 if most significant bit is sent first
*/
struct ir_raw_timings_pl {
unsigned int header_pulse;
unsigned int bit_space;
unsigned int bit_pulse[2];
unsigned int trailer_space;
unsigned int msb_first:1;
};
int ir_raw_gen_pl(struct ir_raw_event **ev, unsigned int max,
const struct ir_raw_timings_pl *timings,
unsigned int n, u64 data);
/*
* Routines from rc-raw.c to be used internally and by decoders
*/
u64 ir_raw_get_allowed_protocols(void);
int ir_raw_event_prepare(struct rc_dev *dev);
int ir_raw_event_register(struct rc_dev *dev);
void ir_raw_event_free(struct rc_dev *dev);
void ir_raw_event_unregister(struct rc_dev *dev);
int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
void ir_raw_load_modules(u64 *protocols);
void ir_raw_init(void);
/*
* lirc interface
*/
#ifdef CONFIG_LIRC
int lirc_dev_init(void);
void lirc_dev_exit(void);
void ir_lirc_raw_event(struct rc_dev *dev, struct ir_raw_event ev);
int ir_lirc_register(struct rc_dev *dev);
void ir_lirc_unregister(struct rc_dev *dev);
#else
static inline int lirc_dev_init(void) { return 0; }
static inline void lirc_dev_exit(void) {}
static inline void ir_lirc_raw_event(struct rc_dev *dev,
struct ir_raw_event ev) { }
static inline int ir_lirc_register(struct rc_dev *dev) { return 0; }
static inline void ir_lirc_unregister(struct rc_dev *dev) { }
#endif
/*
* Decoder initialization code
*
* Those load logic are called during ir-core init, and automatically
* loads the compiled decoders for their usage with IR raw events
*/
#endif /* _RC_CORE_PRIV */
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