diff options
Diffstat (limited to 'drivers/media/IR/ir-core-priv.h')
| -rw-r--r-- | drivers/media/IR/ir-core-priv.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/drivers/media/IR/ir-core-priv.h b/drivers/media/IR/ir-core-priv.h new file mode 100644 index 000000000000..9a5e65a471a5 --- /dev/null +++ b/drivers/media/IR/ir-core-priv.h @@ -0,0 +1,126 @@ +/* + * Remote Controller core raw events header + * + * Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _IR_RAW_EVENT +#define _IR_RAW_EVENT + +#include <linux/slab.h> +#include <media/ir-core.h> + +struct ir_raw_handler { + struct list_head list; + + int (*decode)(struct input_dev *input_dev, struct ir_raw_event event); + int (*raw_register)(struct input_dev *input_dev); + int (*raw_unregister)(struct input_dev *input_dev); +}; + +struct ir_raw_event_ctrl { + struct work_struct rx_work; /* for the rx decoding workqueue */ + struct kfifo kfifo; /* fifo for the pulse/space durations */ + ktime_t last_event; /* when last event occurred */ + enum raw_event_type last_type; /* last event type */ + struct input_dev *input_dev; /* pointer to the parent input_dev */ +}; + +/* macros for IR decoders */ +static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin) +{ + return d1 > (d2 - margin); +} + +static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin) +{ + return ((d1 > (d2 - margin)) && (d1 < (d2 + margin))); +} + +static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y) +{ + return x->pulse != y->pulse; +} + +static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration) +{ + if (duration > ev->duration) + ev->duration = 0; + else + ev->duration -= duration; +} + +#define TO_US(duration) (((duration) + 500) / 1000) +#define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space") +#define IS_RESET(ev) (ev.duration == 0) + +/* + * Routines from ir-sysfs.c - Meant to be called only internally inside + * ir-core + */ + +int ir_register_class(struct input_dev *input_dev); +void ir_unregister_class(struct input_dev *input_dev); + +/* + * Routines from ir-raw-event.c to be used internally and by decoders + */ +int ir_raw_event_register(struct input_dev *input_dev); +void ir_raw_event_unregister(struct input_dev *input_dev); +int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler); +void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler); +void ir_raw_init(void); + + +/* + * Decoder initialization code + * + * Those load logic are called during ir-core init, and automatically + * loads the compiled decoders for their usage with IR raw events + */ + +/* from ir-nec-decoder.c */ +#ifdef CONFIG_IR_NEC_DECODER_MODULE +#define load_nec_decode() request_module("ir-nec-decoder") +#else +#define load_nec_decode() 0 +#endif + +/* from ir-rc5-decoder.c */ +#ifdef CONFIG_IR_RC5_DECODER_MODULE +#define load_rc5_decode() request_module("ir-rc5-decoder") +#else +#define load_rc5_decode() 0 +#endif + +/* from ir-rc6-decoder.c */ +#ifdef CONFIG_IR_RC6_DECODER_MODULE +#define load_rc6_decode() request_module("ir-rc6-decoder") +#else +#define load_rc6_decode() 0 +#endif + +/* from ir-jvc-decoder.c */ +#ifdef CONFIG_IR_JVC_DECODER_MODULE +#define load_jvc_decode() request_module("ir-jvc-decoder") +#else +#define load_jvc_decode() 0 +#endif + +/* from ir-sony-decoder.c */ +#ifdef CONFIG_IR_SONY_DECODER_MODULE +#define load_sony_decode() request_module("ir-sony-decoder") +#else +#define load_sony_decode() 0 +#endif + +#endif /* _IR_RAW_EVENT */ |