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

   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 #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_rec_ptr_1          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
  43         /* raw decoder state follows */
  44         struct ir_raw_event prev_ev;
  45         struct ir_raw_event this_ev;
  46         struct nec_dec {
  47                 int state;
  48                 unsigned count;
  49                 u32 bits;
  50                 bool is_nec_x;
  51                 bool necx_repeat;
  52         } nec;
  53         struct rc5_dec {
  54                 int state;
  55                 u32 bits;
  56                 unsigned count;
  57                 unsigned wanted_bits;
  58         } rc5;
  59         struct rc6_dec {
  60                 int state;
  61                 u8 header;
  62                 u32 body;
  63                 bool toggle;
  64                 unsigned count;
  65                 unsigned wanted_bits;
  66         } rc6;
  67         struct sony_dec {
  68                 int state;
  69                 u32 bits;
  70                 unsigned count;
  71         } sony;
  72         struct jvc_dec {
  73                 int state;
  74                 u16 bits;
  75                 u16 old_bits;
  76                 unsigned count;
  77                 bool first;
  78                 bool toggle;
  79         } jvc;
  80         struct rc5_sz_dec {
  81                 int state;
  82                 u32 bits;
  83                 unsigned count;
  84                 unsigned wanted_bits;
  85         } rc5_sz;
  86         struct sanyo_dec {
  87                 int state;
  88                 unsigned count;
  89                 u64 bits;
  90         } sanyo;
  91         struct sharp_dec {
  92                 int state;
  93                 unsigned count;
  94                 u32 bits;
  95                 unsigned int pulse_len;
  96         } sharp;
  97         struct mce_kbd_dec {
  98                 struct input_dev *idev;
  99                 struct timer_list rx_timeout;
 100                 char name[64];
 101                 char phys[64];
 102                 int state;
 103                 u8 header;
 104                 u32 body;
 105                 unsigned count;
 106                 unsigned wanted_bits;
 107         } mce_kbd;
 108         struct lirc_codec {
 109                 struct rc_dev *dev;
 110                 struct lirc_driver *drv;
 111                 int carrier_low;
 112
 113                 ktime_t gap_start;
 114                 u64 gap_duration;
 115                 bool gap;
 116                 bool send_timeout_reports;
 117
 118         } lirc;
 119 };
 120
 121 /* macros for IR decoders */
 122 static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
 123 {
 124         return d1 > (d2 - margin);
 125 }
 126
 127 static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
 128 {
 129         return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
 130 }
 131
 132 static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
 133 {
 134         return x->pulse != y->pulse;
 135 }
 136
 137 static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
 138 {
 139         if (duration > ev->duration)
 140                 ev->duration = 0;
 141         else
 142                 ev->duration -= duration;
 143 }
 144
 145 /* Returns true if event is normal pulse/space event */
 146 static inline bool is_timing_event(struct ir_raw_event ev)
 147 {
 148         return !ev.carrier_report && !ev.reset;
 149 }
 150
 151 #define TO_US(duration)                 DIV_ROUND_CLOSEST((duration), 1000)
 152 #define TO_STR(is_pulse)                ((is_pulse) ? "pulse" : "space")
 153
 154 /*
 155  * Routines from rc-raw.c to be used internally and by decoders
 156  */
 157 u64 ir_raw_get_allowed_protocols(void);
 158 int ir_raw_event_register(struct rc_dev *dev);
 159 void ir_raw_event_unregister(struct rc_dev *dev);
 160 int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
 161 void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
 162 void ir_raw_init(void);
 163
 164 /*
 165  * Decoder initialization code
 166  *
 167  * Those load logic are called during ir-core init, and automatically
 168  * loads the compiled decoders for their usage with IR raw events
 169  */
 170
 171 /* from ir-nec-decoder.c */
 172 #ifdef CONFIG_IR_NEC_DECODER_MODULE
 173 #define load_nec_decode()       request_module_nowait("ir-nec-decoder")
 174 #else
 175 static inline void load_nec_decode(void) { }
 176 #endif
 177
 178 /* from ir-rc5-decoder.c */
 179 #ifdef CONFIG_IR_RC5_DECODER_MODULE
 180 #define load_rc5_decode()       request_module_nowait("ir-rc5-decoder")
 181 #else
 182 static inline void load_rc5_decode(void) { }
 183 #endif
 184
 185 /* from ir-rc6-decoder.c */
 186 #ifdef CONFIG_IR_RC6_DECODER_MODULE
 187 #define load_rc6_decode()       request_module_nowait("ir-rc6-decoder")
 188 #else
 189 static inline void load_rc6_decode(void) { }
 190 #endif
 191
 192 /* from ir-jvc-decoder.c */
 193 #ifdef CONFIG_IR_JVC_DECODER_MODULE
 194 #define load_jvc_decode()       request_module_nowait("ir-jvc-decoder")
 195 #else
 196 static inline void load_jvc_decode(void) { }
 197 #endif
 198
 199 /* from ir-sony-decoder.c */
 200 #ifdef CONFIG_IR_SONY_DECODER_MODULE
 201 #define load_sony_decode()      request_module_nowait("ir-sony-decoder")
 202 #else
 203 static inline void load_sony_decode(void) { }
 204 #endif
 205
 206 /* from ir-sanyo-decoder.c */
 207 #ifdef CONFIG_IR_SANYO_DECODER_MODULE
 208 #define load_sanyo_decode()     request_module_nowait("ir-sanyo-decoder")
 209 #else
 210 static inline void load_sanyo_decode(void) { }
 211 #endif
 212
 213 /* from ir-sharp-decoder.c */
 214 #ifdef CONFIG_IR_SHARP_DECODER_MODULE
 215 #define load_sharp_decode()     request_module_nowait("ir-sharp-decoder")
 216 #else
 217 static inline void load_sharp_decode(void) { }
 218 #endif
 219
 220 /* from ir-mce_kbd-decoder.c */
 221 #ifdef CONFIG_IR_MCE_KBD_DECODER_MODULE
 222 #define load_mce_kbd_decode()   request_module_nowait("ir-mce_kbd-decoder")
 223 #else
 224 static inline void load_mce_kbd_decode(void) { }
 225 #endif
 226
 227 /* from ir-lirc-codec.c */
 228 #ifdef CONFIG_IR_LIRC_CODEC_MODULE
 229 #define load_lirc_codec()       request_module_nowait("ir-lirc-codec")
 230 #else
 231 static inline void load_lirc_codec(void) { }
 232 #endif
 233
 234
 235 #endif /* _RC_CORE_PRIV */