175 lines
4.1 KiB
C
175 lines
4.1 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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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 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 <linux/spinlock.h>
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#include <media/rc-core.h>
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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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/* These two should only be used by the lirc 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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spinlock_t lock;
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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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enum raw_event_type last_type; /* last event type */
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struct rc_dev *dev; /* pointer to the parent rc_dev */
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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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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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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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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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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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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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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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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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struct mce_kbd_dec {
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struct input_dev *idev;
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struct timer_list rx_timeout;
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char name[64];
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char phys[64];
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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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struct lirc_codec {
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struct rc_dev *dev;
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struct lirc_driver *drv;
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int carrier_low;
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ktime_t gap_start;
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u64 gap_duration;
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bool gap;
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bool send_timeout_reports;
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} lirc;
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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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};
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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_US(duration) DIV_ROUND_CLOSEST((duration), 1000)
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#define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
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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_register(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_init(void);
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/*
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* Decoder initialization code
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*
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* Those load logic are called during ir-core init, and automatically
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* loads the compiled decoders for their usage with IR raw events
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*/
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#endif /* _RC_CORE_PRIV */
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