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> 20#include <media/ir-core.h> 21 22struct ir_raw_handler { 23 struct list_head list; 24 25 u64 protocols; /* which are handled by this handler */ 26 int (*decode)(struct input_dev *input_dev, struct ir_raw_event event); 27 28 /* These two should only be used by the lirc decoder */ 29 int (*raw_register)(struct input_dev *input_dev); 30 int (*raw_unregister)(struct input_dev *input_dev); 31}; 32 33struct ir_raw_event_ctrl { 34 struct list_head list; /* to keep track of raw clients */ 35 struct task_struct *thread; 36 struct kfifo kfifo; /* fifo for the pulse/space durations */ 37 ktime_t last_event; /* when last event occurred */ 38 enum raw_event_type last_type; /* last event type */ 39 struct input_dev *input_dev; /* pointer to the parent input_dev */ 40 u64 enabled_protocols; /* enabled raw protocol decoders */ 41 42 /* raw decoder state follows */ 43 struct ir_raw_event prev_ev; 44 struct ir_raw_event this_ev; 45 struct nec_dec { 46 int state; 47 unsigned count; 48 u32 bits; 49 bool is_nec_x; 50 bool necx_repeat; 51 } nec; 52 struct rc5_dec { 53 int state; 54 u32 bits; 55 unsigned count; 56 unsigned wanted_bits; 57 } rc5; 58 struct rc6_dec { 59 int state; 60 u8 header; 61 u32 body; 62 bool toggle; 63 unsigned count; 64 unsigned wanted_bits; 65 } rc6; 66 struct sony_dec { 67 int state; 68 u32 bits; 69 unsigned count; 70 } sony; 71 struct jvc_dec { 72 int state; 73 u16 bits; 74 u16 old_bits; 75 unsigned count; 76 bool first; 77 bool toggle; 78 } jvc; 79 struct lirc_codec { 80 struct ir_input_dev *ir_dev; 81 struct lirc_driver *drv; 82 int carrier_low; 83 } lirc; 84}; 85 86/* macros for IR decoders */ 87static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin) 88{ 89 return d1 > (d2 - margin); 90} 91 92static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin) 93{ 94 return ((d1 > (d2 - margin)) && (d1 < (d2 + margin))); 95} 96 97static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y) 98{ 99 return x->pulse != y->pulse; 100} 101 102static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration) 103{ 104 if (duration > ev->duration) 105 ev->duration = 0; 106 else 107 ev->duration -= duration; 108} 109 110#define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000) 111#define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space") 112#define IS_RESET(ev) (ev.duration == 0) 113/* 114 * Routines from ir-sysfs.c - Meant to be called only internally inside 115 * ir-core 116 */ 117 118int ir_register_class(struct input_dev *input_dev); 119void ir_unregister_class(struct input_dev *input_dev); 120 121/* 122 * Routines from ir-raw-event.c to be used internally and by decoders 123 */ 124u64 ir_raw_get_allowed_protocols(void); 125int ir_raw_event_register(struct input_dev *input_dev); 126void ir_raw_event_unregister(struct input_dev *input_dev); 127int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler); 128void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler); 129void ir_raw_init(void); 130 131int ir_rcmap_init(void); 132void ir_rcmap_cleanup(void); 133/* 134 * Decoder initialization code 135 * 136 * Those load logic are called during ir-core init, and automatically 137 * loads the compiled decoders for their usage with IR raw events 138 */ 139 140/* from ir-nec-decoder.c */ 141#ifdef CONFIG_IR_NEC_DECODER_MODULE 142#define load_nec_decode() request_module("ir-nec-decoder") 143#else 144#define load_nec_decode() 0 145#endif 146 147/* from ir-rc5-decoder.c */ 148#ifdef CONFIG_IR_RC5_DECODER_MODULE 149#define load_rc5_decode() request_module("ir-rc5-decoder") 150#else 151#define load_rc5_decode() 0 152#endif 153 154/* from ir-rc6-decoder.c */ 155#ifdef CONFIG_IR_RC6_DECODER_MODULE 156#define load_rc6_decode() request_module("ir-rc6-decoder") 157#else 158#define load_rc6_decode() 0 159#endif 160 161/* from ir-jvc-decoder.c */ 162#ifdef CONFIG_IR_JVC_DECODER_MODULE 163#define load_jvc_decode() request_module("ir-jvc-decoder") 164#else 165#define load_jvc_decode() 0 166#endif 167 168/* from ir-sony-decoder.c */ 169#ifdef CONFIG_IR_SONY_DECODER_MODULE 170#define load_sony_decode() request_module("ir-sony-decoder") 171#else 172#define load_sony_decode() 0 173#endif 174 175/* from ir-lirc-codec.c */ 176#ifdef CONFIG_IR_LIRC_CODEC_MODULE 177#define load_lirc_codec() request_module("ir-lirc-codec") 178#else 179#define load_lirc_codec() 0 180#endif 181 182 183#endif /* _IR_RAW_EVENT */ 184