drivers/media/rc/rc-core-priv.h

   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 sanyo_dec {
  88                 int state;
  89                 unsigned count;
  90                 u64 bits;
  91         } sanyo;
  92         struct mce_kbd_dec {
  93                 struct input_dev *idev;
  94                 struct timer_list rx_timeout;
  95                 char name[64];
  96                 char phys[64];
  97                 int state;
  98                 u8 header;
  99                 u32 body;
 100                 unsigned count;
 101                 unsigned wanted_bits;
 102         } mce_kbd;
 103         struct lirc_codec {
 104                 struct rc_dev *dev;
 105                 struct lirc_driver *drv;
 106                 int carrier_low;
 107
 108                 ktime_t gap_start;
 109                 u64 gap_duration;
 110                 bool gap;
 111                 bool send_timeout_reports;
 112
 113         } lirc;
 114 };
 115
 116 /* macros for IR decoders */
 117 static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
 118 {
 119         return d1 > (d2 - margin);
 120 }
 121
 122 static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
 123 {
 124         return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
 125 }
 126
 127 static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
 128 {
 129         return x->pulse != y->pulse;
 130 }
 131
 132 static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
 133 {
 134         if (duration > ev->duration)
 135                 ev->duration = 0;
 136         else
 137                 ev->duration -= duration;
 138 }
 139
 140 /* Returns true if event is normal pulse/space event */
 141 static inline bool is_timing_event(struct ir_raw_event ev)
 142 {
 143         return !ev.carrier_report && !ev.reset;
 144 }
 145
 146 #define TO_US(duration)                 DIV_ROUND_CLOSEST((duration), 1000)
 147 #define TO_STR(is_pulse)                ((is_pulse) ? "pulse" : "space")
 148
 149 /*
 150  * Routines from rc-raw.c to be used internally and by decoders
 151  */
 152 u64 ir_raw_get_allowed_protocols(void);
 153 int ir_raw_event_register(struct rc_dev *dev);
 154 void ir_raw_event_unregister(struct rc_dev *dev);
 155 int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
 156 void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
 157 void ir_raw_init(void);
 158
 159 /*
 160  * Decoder initialization code
 161  *
 162  * Those load logic are called during ir-core init, and automatically
 163  * loads the compiled decoders for their usage with IR raw events
 164  */
 165
 166 /* from ir-nec-decoder.c */
 167 #ifdef CONFIG_IR_NEC_DECODER_MODULE
 168 #define load_nec_decode()       request_module("ir-nec-decoder")
 169 #else
 170 static inline void load_nec_decode(void) { }
 171 #endif
 172
 173 /* from ir-rc5-decoder.c */
 174 #ifdef CONFIG_IR_RC5_DECODER_MODULE
 175 #define load_rc5_decode()       request_module("ir-rc5-decoder")
 176 #else
 177 static inline void load_rc5_decode(void) { }
 178 #endif
 179
 180 /* from ir-rc6-decoder.c */
 181 #ifdef CONFIG_IR_RC6_DECODER_MODULE
 182 #define load_rc6_decode()       request_module("ir-rc6-decoder")
 183 #else
 184 static inline void load_rc6_decode(void) { }
 185 #endif
 186
 187 /* from ir-jvc-decoder.c */
 188 #ifdef CONFIG_IR_JVC_DECODER_MODULE
 189 #define load_jvc_decode()       request_module("ir-jvc-decoder")
 190 #else
 191 static inline void load_jvc_decode(void) { }
 192 #endif
 193
 194 /* from ir-sony-decoder.c */
 195 #ifdef CONFIG_IR_SONY_DECODER_MODULE
 196 #define load_sony_decode()      request_module("ir-sony-decoder")
 197 #else
 198 static inline void load_sony_decode(void) { }
 199 #endif
 200
 201 /* from ir-sanyo-decoder.c */
 202 #ifdef CONFIG_IR_SANYO_DECODER_MODULE
 203 #define load_sanyo_decode()     request_module("ir-sanyo-decoder")
 204 #else
 205 static inline void load_sanyo_decode(void) { }
 206 #endif
 207
 208 /* from ir-mce_kbd-decoder.c */
 209 #ifdef CONFIG_IR_MCE_KBD_DECODER_MODULE
 210 #define load_mce_kbd_decode()   request_module("ir-mce_kbd-decoder")
 211 #else
 212 static inline void load_mce_kbd_decode(void) { }
 213 #endif
 214
 215 /* from ir-lirc-codec.c */
 216 #ifdef CONFIG_IR_LIRC_CODEC_MODULE
 217 #define load_lirc_codec()       request_module("ir-lirc-codec")
 218 #else
 219 static inline void load_lirc_codec(void) { }
 220 #endif
 221
 222
 223 #endif /* _RC_CORE_PRIV */