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/*
* Remote Controller core raw events header
*
* Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _RC_CORE_PRIV
#define _RC_CORE_PRIV
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <media/rc-core.h>
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);
/* These two should only be used by the lirc 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;
spinlock_t lock;
struct kfifo kfifo; /* fifo for the pulse/space durations */
ktime_t last_event; /* when last event occurred */
enum raw_event_type last_type; /* last event type */
struct rc_dev *dev; /* pointer to the parent rc_dev */
u64 enabled_protocols; /* enabled raw protocol decoders */
/* 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;
unsigned wanted_bits;
} 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 rc5_sz_dec {
int state;
u32 bits;
unsigned count;
unsigned wanted_bits;
} rc5_sz;
struct lirc_codec {
struct rc_dev *dev;
struct lirc_driver *drv;
int carrier_low;
ktime_t gap_start;
u64 gap_duration;
bool gap;
bool send_timeout_reports;
} lirc;
};
/* 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")
/*
* Routines from rc-raw.c to be used internally and by decoders
*/
u64 ir_raw_get_allowed_protocols(void);
int ir_raw_event_register(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_init(void);
/*
* 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
*/
/* from ir-nec-decoder.c */
#ifdef CONFIG_IR_NEC_DECODER_MODULE
#define load_nec_decode() request_module("ir-nec-decoder")
#else
#define load_nec_decode() 0
#endif
/* from ir-rc5-decoder.c */
#ifdef CONFIG_IR_RC5_DECODER_MODULE
#define load_rc5_decode() request_module("ir-rc5-decoder")
#else
#define load_rc5_decode() 0
#endif
/* from ir-rc6-decoder.c */
#ifdef CONFIG_IR_RC6_DECODER_MODULE
#define load_rc6_decode() request_module("ir-rc6-decoder")
#else
#define load_rc6_decode() 0
#endif
/* from ir-jvc-decoder.c */
#ifdef CONFIG_IR_JVC_DECODER_MODULE
#define load_jvc_decode() request_module("ir-jvc-decoder")
#else
#define load_jvc_decode() 0
#endif
/* from ir-sony-decoder.c */
#ifdef CONFIG_IR_SONY_DECODER_MODULE
#define load_sony_decode() request_module("ir-sony-decoder")
#else
#define load_sony_decode() 0
#endif
/* from ir-lirc-codec.c */
#ifdef CONFIG_IR_LIRC_CODEC_MODULE
#define load_lirc_codec() request_module("ir-lirc-codec")
#else
#define load_lirc_codec() 0
#endif
#endif /* _RC_CORE_PRIV */
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