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 _RC_CORE_PRIV 17 #define _RC_CORE_PRIV 18 19 #include <linux/slab.h> 20 #include <linux/spinlock.h> 21 #include <media/rc-core.h> 22 23 struct ir_raw_handler { 24 struct list_head list; 25 26 u64 protocols; /* which are handled by this handler */ 27 int (*decode)(struct rc_dev *dev, struct ir_raw_event event); 28 29 /* These two should only be used by the lirc decoder */ 30 int (*raw_register)(struct rc_dev *dev); 31 int (*raw_unregister)(struct rc_dev *dev); 32 }; 33 34 struct ir_raw_event_ctrl { 35 struct list_head list; /* to keep track of raw clients */ 36 struct task_struct *thread; 37 spinlock_t lock; 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 */ 41 struct rc_dev *dev; /* pointer to the parent rc_dev */ 42 u64 enabled_protocols; /* enabled raw protocol decoders */ 43 44 /* raw decoder state follows */ 45 struct ir_raw_event prev_ev; 46 struct ir_raw_event this_ev; 47 struct nec_dec { 48 int state; 49 unsigned count; 50 u32 bits; 51 bool is_nec_x; 52 bool necx_repeat; 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; 81 struct rc5_sz_dec { 82 int state; 83 u32 bits; 84 unsigned count; 85 unsigned wanted_bits; 86 } rc5_sz; 87 struct mce_kbd_dec { 88 struct input_dev *idev; 89 struct timer_list rx_timeout; 90 char name[64]; 91 char phys[64]; 92 int state; 93 u8 header; 94 u32 body; 95 unsigned count; 96 unsigned wanted_bits; 97 } mce_kbd; 98 struct lirc_codec { 99 struct rc_dev *dev; 100 struct lirc_driver *drv; 101 int carrier_low; 102 103 ktime_t gap_start; 104 u64 gap_duration; 105 bool gap; 106 bool send_timeout_reports; 107 108 } lirc; 109 }; 110 111 /* macros for IR decoders */ 112 static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin) 113 { 114 return d1 > (d2 - margin); 115 } 116 117 static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin) 118 { 119 return ((d1 > (d2 - margin)) && (d1 < (d2 + margin))); 120 } 121 122 static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y) 123 { 124 return x->pulse != y->pulse; 125 } 126 127 static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration) 128 { 129 if (duration > ev->duration) 130 ev->duration = 0; 131 else 132 ev->duration -= duration; 133 } 134 135 /* Returns true if event is normal pulse/space event */ 136 static inline bool is_timing_event(struct ir_raw_event ev) 137 { 138 return !ev.carrier_report && !ev.reset; 139 } 140 141 #define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000) 142 #define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space") 143 144 /* 145 * Routines from rc-raw.c to be used internally and by decoders 146 */ 147 u64 ir_raw_get_allowed_protocols(void); 148 int ir_raw_event_register(struct rc_dev *dev); 149 void ir_raw_event_unregister(struct rc_dev *dev); 150 int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler); 151 void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler); 152 void ir_raw_init(void); 153 154 /* 155 * Decoder initialization code 156 * 157 * Those load logic are called during ir-core init, and automatically 158 * loads the compiled decoders for their usage with IR raw events 159 */ 160 161 /* from ir-nec-decoder.c */ 162 #ifdef CONFIG_IR_NEC_DECODER_MODULE 163 #define load_nec_decode() request_module("ir-nec-decoder") 164 #else 165 #define load_nec_decode() 0 166 #endif 167 168 /* from ir-rc5-decoder.c */ 169 #ifdef CONFIG_IR_RC5_DECODER_MODULE 170 #define load_rc5_decode() request_module("ir-rc5-decoder") 171 #else 172 #define load_rc5_decode() 0 173 #endif 174 175 /* from ir-rc6-decoder.c */ 176 #ifdef CONFIG_IR_RC6_DECODER_MODULE 177 #define load_rc6_decode() request_module("ir-rc6-decoder") 178 #else 179 #define load_rc6_decode() 0 180 #endif 181 182 /* from ir-jvc-decoder.c */ 183 #ifdef CONFIG_IR_JVC_DECODER_MODULE 184 #define load_jvc_decode() request_module("ir-jvc-decoder") 185 #else 186 #define load_jvc_decode() 0 187 #endif 188 189 /* from ir-sony-decoder.c */ 190 #ifdef CONFIG_IR_SONY_DECODER_MODULE 191 #define load_sony_decode() request_module("ir-sony-decoder") 192 #else 193 #define load_sony_decode() 0 194 #endif 195 196 /* from ir-mce_kbd-decoder.c */ 197 #ifdef CONFIG_IR_MCE_KBD_DECODER_MODULE 198 #define load_mce_kbd_decode() request_module("ir-mce_kbd-decoder") 199 #else 200 #define load_mce_kbd_decode() 0 201 #endif 202 203 /* from ir-lirc-codec.c */ 204 #ifdef CONFIG_IR_LIRC_CODEC_MODULE 205 #define load_lirc_codec() request_module("ir-lirc-codec") 206 #else 207 #define load_lirc_codec() 0 208 #endif 209 210 211 #endif /* _RC_CORE_PRIV */ 212