[linux-2.6-block.git] / drivers / media / rc / rc-core-priv.h

/*
 * 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 _IR_RAW_EVENT
#define _IR_RAW_EVENT

#include <linux/slab.h>
#include <linux/spinlock.h>
#include <media/ir-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 /* _IR_RAW_EVENT */
Commit	Line	Data
3f113e36 MCC	1	/*
	2	* Remote Controller core raw events header
	3	*
	4	* Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation version 2 of the License.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*/
	15
	16	#ifndef _IR_RAW_EVENT
	17	#define _IR_RAW_EVENT
	18
	19	#include <linux/slab.h>
c6ef1e7f	20	#include <linux/spinlock.h>
3f113e36 MCC	21	#include <media/ir-core.h>
	22
	23	struct ir_raw_handler {
	24	struct list_head list;
	25
667c9ebe	26	u64 protocols; /* which are handled by this handler */
d8b4b582	27	int (decode)(struct rc_dev dev, struct ir_raw_event event);
c216369e DH	28
c216369e DH	29	/* These two should only be used by the lirc decoder */
d8b4b582 DH	30	int (raw_register)(struct rc_dev dev);
d8b4b582 DH	31	int (raw_unregister)(struct rc_dev dev);
3f113e36 MCC	32	};
	33
	34	struct ir_raw_event_ctrl {
c216369e	35	struct list_head list; /* to keep track of raw clients */
0d2cb1de	36	struct task_struct *thread;
c6ef1e7f	37	spinlock_t lock;
3f113e36 MCC	38	struct kfifo kfifo; /* fifo for the pulse/space durations */
	39	ktime_t last_event; /* when last event occurred */
	40	enum raw_event_type last_type; /* last event type */
d8b4b582	41	struct rc_dev dev; / pointer to the parent rc_dev */
667c9ebe	42	u64 enabled_protocols; /* enabled raw protocol decoders */
c216369e DH	43
	44	/* raw decoder state follows */
	45	struct ir_raw_event prev_ev;
4a702ebf	46	struct ir_raw_event this_ev;
c216369e DH	47	struct nec_dec {
	48	int state;
	49	unsigned count;
	50	u32 bits;
86ff071c ML	51	bool is_nec_x;
86ff071c ML	52	bool necx_repeat;
c216369e DH	53	} nec;
	54	struct rc5_dec {
	55	int state;
	56	u32 bits;
	57	unsigned count;
	58	unsigned wanted_bits;
	59	} rc5;
	60	struct rc6_dec {
	61	int state;
	62	u8 header;
	63	u32 body;
	64	bool toggle;
	65	unsigned count;
	66	unsigned wanted_bits;
	67	} rc6;
	68	struct sony_dec {
	69	int state;
	70	u32 bits;
	71	unsigned count;
	72	} sony;
	73	struct jvc_dec {
	74	int state;
	75	u16 bits;
	76	u16 old_bits;
	77	unsigned count;
	78	bool first;
	79	bool toggle;
	80	} jvc;
7a569f52 JW	81	struct rc5_sz_dec {
	82	int state;
	83	u32 bits;
	84	unsigned count;
	85	unsigned wanted_bits;
	86	} rc5_sz;
ca414698	87	struct lirc_codec {
d8b4b582	88	struct rc_dev *dev;
ca414698	89	struct lirc_driver *drv;
e589333f	90	int carrier_low;
4651918a ML	91
	92	ktime_t gap_start;
	93	u64 gap_duration;
	94	bool gap;
	95	bool send_timeout_reports;
	96
ca414698	97	} lirc;
3f113e36 MCC	98	};
	99
	100	/* macros for IR decoders */
384f23e8 MCC	101	static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
384f23e8 MCC	102	{
e40b1127 DH	103	return d1 > (d2 - margin);
	104	}
	105
384f23e8 MCC	106	static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
384f23e8 MCC	107	{
e40b1127 DH	108	return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
	109	}
	110
384f23e8 MCC	111	static inline bool is_transition(struct ir_raw_event x, struct ir_raw_event y)
384f23e8 MCC	112	{
e40b1127 DH	113	return x->pulse != y->pulse;
	114	}
	115
384f23e8 MCC	116	static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
384f23e8 MCC	117	{
e40b1127 DH	118	if (duration > ev->duration)
	119	ev->duration = 0;
	120	else
	121	ev->duration -= duration;
	122	}
	123
4651918a ML	124	/* Returns true if event is normal pulse/space event */
	125	static inline bool is_timing_event(struct ir_raw_event ev)
	126	{
	127	return !ev.carrier_report && !ev.reset;
	128	}
	129
510fcb70	130	#define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000)
e40b1127	131	#define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
3f113e36 MCC	132
3f113e36 MCC	133	/*
d8b4b582	134	* Routines from rc-raw.c to be used internally and by decoders
3f113e36	135	*/
667c9ebe	136	u64 ir_raw_get_allowed_protocols(void);
d8b4b582 DH	137	int ir_raw_event_register(struct rc_dev *dev);
d8b4b582 DH	138	void ir_raw_event_unregister(struct rc_dev *dev);
3f113e36 MCC	139	int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
	140	void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
	141	void ir_raw_init(void);
	142
3f113e36 MCC	143	/*
	144	* Decoder initialization code
	145	*
	146	* Those load logic are called during ir-core init, and automatically
	147	* loads the compiled decoders for their usage with IR raw events
	148	*/
	149
	150	/* from ir-nec-decoder.c */
	151	#ifdef CONFIG_IR_NEC_DECODER_MODULE
	152	#define load_nec_decode() request_module("ir-nec-decoder")
	153	#else
	154	#define load_nec_decode() 0
	155	#endif
	156
	157	/* from ir-rc5-decoder.c */
	158	#ifdef CONFIG_IR_RC5_DECODER_MODULE
	159	#define load_rc5_decode() request_module("ir-rc5-decoder")
	160	#else
	161	#define load_rc5_decode() 0
	162	#endif
	163
784a4931	164	/* from ir-rc6-decoder.c */
f35473e6	165	#ifdef CONFIG_IR_RC6_DECODER_MODULE
784a4931 DH	166	#define load_rc6_decode() request_module("ir-rc6-decoder")
	167	#else
	168	#define load_rc6_decode() 0
	169	#endif
	170
bf670f64 DH	171	/* from ir-jvc-decoder.c */
	172	#ifdef CONFIG_IR_JVC_DECODER_MODULE
	173	#define load_jvc_decode() request_module("ir-jvc-decoder")
	174	#else
	175	#define load_jvc_decode() 0
	176	#endif
	177
3fe29c89 DH	178	/* from ir-sony-decoder.c */
	179	#ifdef CONFIG_IR_SONY_DECODER_MODULE
	180	#define load_sony_decode() request_module("ir-sony-decoder")
	181	#else
	182	#define load_sony_decode() 0
	183	#endif
	184
ca414698 JW	185	/* from ir-lirc-codec.c */
	186	#ifdef CONFIG_IR_LIRC_CODEC_MODULE
	187	#define load_lirc_codec() request_module("ir-lirc-codec")
	188	#else
	189	#define load_lirc_codec() 0
	190	#endif
	191
	192
3f113e36	193	#endif /* _IR_RAW_EVENT */