mirror of
https://github.com/torvalds/linux.git
synced 2024-12-22 02:52:56 +00:00
408d024442
One struct ir_raw_event_ctrl is allocated per raw IR device; reduce the amount allocated if not all decoders are enabled. Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
353 lines
9.1 KiB
C
353 lines
9.1 KiB
C
/* 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 RC_DEV_MAX 256
|
|
/* Define the max number of pulse/space transitions to buffer */
|
|
#define MAX_IR_EVENT_SIZE 512
|
|
|
|
#include <linux/slab.h>
|
|
#include <uapi/linux/bpf.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;
|
|
u32 min_timeout;
|
|
|
|
/* 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 */
|
|
/* handle delayed ir_raw_event_store_edge processing */
|
|
spinlock_t edge_spinlock;
|
|
struct timer_list edge_handle;
|
|
|
|
/* raw decoder state follows */
|
|
struct ir_raw_event prev_ev;
|
|
struct ir_raw_event this_ev;
|
|
|
|
#ifdef CONFIG_BPF_LIRC_MODE2
|
|
u32 bpf_sample;
|
|
struct bpf_prog_array __rcu *progs;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_IR_NEC_DECODER)
|
|
struct nec_dec {
|
|
int state;
|
|
unsigned count;
|
|
u32 bits;
|
|
bool is_nec_x;
|
|
bool necx_repeat;
|
|
} nec;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_IR_RC5_DECODER)
|
|
struct rc5_dec {
|
|
int state;
|
|
u32 bits;
|
|
unsigned count;
|
|
bool is_rc5x;
|
|
} rc5;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_IR_RC6_DECODER)
|
|
struct rc6_dec {
|
|
int state;
|
|
u8 header;
|
|
u32 body;
|
|
bool toggle;
|
|
unsigned count;
|
|
unsigned wanted_bits;
|
|
} rc6;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_IR_SONY_DECODER)
|
|
struct sony_dec {
|
|
int state;
|
|
u32 bits;
|
|
unsigned count;
|
|
} sony;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_IR_JVC_DECODER)
|
|
struct jvc_dec {
|
|
int state;
|
|
u16 bits;
|
|
u16 old_bits;
|
|
unsigned count;
|
|
bool first;
|
|
bool toggle;
|
|
} jvc;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_IR_SANYO_DECODER)
|
|
struct sanyo_dec {
|
|
int state;
|
|
unsigned count;
|
|
u64 bits;
|
|
} sanyo;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_IR_SHARP_DECODER)
|
|
struct sharp_dec {
|
|
int state;
|
|
unsigned count;
|
|
u32 bits;
|
|
unsigned int pulse_len;
|
|
} sharp;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_IR_MCE_KBD_DECODER)
|
|
struct mce_kbd_dec {
|
|
/* locks key up timer */
|
|
spinlock_t keylock;
|
|
struct timer_list rx_timeout;
|
|
int state;
|
|
u8 header;
|
|
u32 body;
|
|
unsigned count;
|
|
unsigned wanted_bits;
|
|
} mce_kbd;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_IR_XMP_DECODER)
|
|
struct xmp_dec {
|
|
int state;
|
|
unsigned count;
|
|
u32 durations[16];
|
|
} xmp;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_IR_IMON_DECODER)
|
|
struct imon_dec {
|
|
int state;
|
|
int count;
|
|
int last_chk;
|
|
unsigned int bits;
|
|
bool stick_keyboard;
|
|
} imon;
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_IR_RCMM_DECODER)
|
|
struct rcmm_dec {
|
|
int state;
|
|
unsigned int count;
|
|
u32 bits;
|
|
} rcmm;
|
|
#endif
|
|
};
|
|
|
|
/* Mutex for locking raw IR processing and handler change */
|
|
extern struct mutex ir_raw_handler_lock;
|
|
|
|
/* 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)
|
|
{
|
|
*ev = (struct ir_raw_event) {
|
|
.duration = duration,
|
|
.pulse = pulse
|
|
};
|
|
}
|
|
|
|
/**
|
|
* struct ir_raw_timings_manchester - Manchester coding timings
|
|
* @leader_pulse: duration of leader pulse (if any) 0 if continuing
|
|
* existing signal
|
|
* @leader_space: duration of leader space (if any)
|
|
* @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_pulse;
|
|
unsigned int leader_space;
|
|
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);
|
|
void ir_lirc_scancode_event(struct rc_dev *dev, struct lirc_scancode *lsc);
|
|
int ir_lirc_register(struct rc_dev *dev);
|
|
void ir_lirc_unregister(struct rc_dev *dev);
|
|
struct rc_dev *rc_dev_get_from_fd(int fd);
|
|
#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 void ir_lirc_scancode_event(struct rc_dev *dev,
|
|
struct lirc_scancode *lsc) { }
|
|
static inline int ir_lirc_register(struct rc_dev *dev) { return 0; }
|
|
static inline void ir_lirc_unregister(struct rc_dev *dev) { }
|
|
#endif
|
|
|
|
/*
|
|
* bpf interface
|
|
*/
|
|
#ifdef CONFIG_BPF_LIRC_MODE2
|
|
void lirc_bpf_free(struct rc_dev *dev);
|
|
void lirc_bpf_run(struct rc_dev *dev, u32 sample);
|
|
#else
|
|
static inline void lirc_bpf_free(struct rc_dev *dev) { }
|
|
static inline void lirc_bpf_run(struct rc_dev *dev, u32 sample) { }
|
|
#endif
|
|
|
|
#endif /* _RC_CORE_PRIV */
|