1 /* 2 * Remote Controller core raw events header 3 * 4 * Copyright (C) 2010 by Mauro Carvalho Chehab 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 /* Define the max number of pulse/space transitions to buffer */ 20 #define MAX_IR_EVENT_SIZE 512 21 22 #include <linux/slab.h> 23 #include <linux/spinlock.h> 24 #include <media/rc-core.h> 25 26 struct ir_raw_handler { 27 struct list_head list; 28 29 u64 protocols; /* which are handled by this handler */ 30 int (*decode)(struct rc_dev *dev, struct ir_raw_event event); 31 32 /* These two should only be used by the lirc decoder */ 33 int (*raw_register)(struct rc_dev *dev); 34 int (*raw_unregister)(struct rc_dev *dev); 35 }; 36 37 struct ir_raw_event_ctrl { 38 struct list_head list; /* to keep track of raw clients */ 39 struct task_struct *thread; 40 spinlock_t lock; 41 /* fifo for the pulse/space durations */ 42 DECLARE_KFIFO(kfifo, struct ir_raw_event, MAX_IR_EVENT_SIZE); 43 ktime_t last_event; /* when last event occurred */ 44 enum raw_event_type last_type; /* last event type */ 45 struct rc_dev *dev; /* pointer to the parent rc_dev */ 46 47 /* raw decoder state follows */ 48 struct ir_raw_event prev_ev; 49 struct ir_raw_event this_ev; 50 struct nec_dec { 51 int state; 52 unsigned count; 53 u32 bits; 54 bool is_nec_x; 55 bool necx_repeat; 56 } nec; 57 struct rc5_dec { 58 int state; 59 u32 bits; 60 unsigned count; 61 bool is_rc5x; 62 } rc5; 63 struct rc6_dec { 64 int state; 65 u8 header; 66 u32 body; 67 bool toggle; 68 unsigned count; 69 unsigned wanted_bits; 70 } rc6; 71 struct sony_dec { 72 int state; 73 u32 bits; 74 unsigned count; 75 } sony; 76 struct jvc_dec { 77 int state; 78 u16 bits; 79 u16 old_bits; 80 unsigned count; 81 bool first; 82 bool toggle; 83 } jvc; 84 struct sanyo_dec { 85 int state; 86 unsigned count; 87 u64 bits; 88 } sanyo; 89 struct sharp_dec { 90 int state; 91 unsigned count; 92 u32 bits; 93 unsigned int pulse_len; 94 } sharp; 95 struct mce_kbd_dec { 96 struct input_dev *idev; 97 struct timer_list rx_timeout; 98 char name[64]; 99 char phys[64]; 100 int state; 101 u8 header; 102 u32 body; 103 unsigned count; 104 unsigned wanted_bits; 105 } mce_kbd; 106 struct lirc_codec { 107 struct rc_dev *dev; 108 struct lirc_driver *drv; 109 int carrier_low; 110 111 ktime_t gap_start; 112 u64 gap_duration; 113 bool gap; 114 bool send_timeout_reports; 115 116 } lirc; 117 struct xmp_dec { 118 int state; 119 unsigned count; 120 u32 durations[16]; 121 } xmp; 122 }; 123 124 /* macros for IR decoders */ 125 static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin) 126 { 127 return d1 > (d2 - margin); 128 } 129 130 static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin) 131 { 132 return ((d1 > (d2 - margin)) && (d1 < (d2 + margin))); 133 } 134 135 static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y) 136 { 137 return x->pulse != y->pulse; 138 } 139 140 static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration) 141 { 142 if (duration > ev->duration) 143 ev->duration = 0; 144 else 145 ev->duration -= duration; 146 } 147 148 /* Returns true if event is normal pulse/space event */ 149 static inline bool is_timing_event(struct ir_raw_event ev) 150 { 151 return !ev.carrier_report && !ev.reset; 152 } 153 154 #define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000) 155 #define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space") 156 157 /* 158 * Routines from rc-raw.c to be used internally and by decoders 159 */ 160 u64 ir_raw_get_allowed_protocols(void); 161 int ir_raw_event_register(struct rc_dev *dev); 162 void ir_raw_event_unregister(struct rc_dev *dev); 163 int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler); 164 void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler); 165 void ir_raw_init(void); 166 167 /* 168 * Decoder initialization code 169 * 170 * Those load logic are called during ir-core init, and automatically 171 * loads the compiled decoders for their usage with IR raw events 172 */ 173 174 #endif /* _RC_CORE_PRIV */ 175