diff options
Diffstat (limited to 'drivers/media/IR/ir-core-priv.h')
| -rw-r--r-- | drivers/media/IR/ir-core-priv.h | 111 |
1 files changed, 111 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..ea546659e4ce --- /dev/null +++ b/drivers/media/IR/ir-core-priv.h @@ -0,0 +1,111 @@ +/* + * 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, s64 duration); + 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 */ +#define PULSE(units) ((units)) +#define SPACE(units) (-(units)) +#define IS_RESET(duration) ((duration) == 0) +#define IS_PULSE(duration) ((duration) > 0) +#define IS_SPACE(duration) ((duration) < 0) +#define DURATION(duration) (abs((duration))) +#define IS_TRANSITION(x, y) ((x) * (y) < 0) +#define DECREASE_DURATION(duration, amount) \ + do { \ + if (IS_SPACE(duration)) \ + duration += (amount); \ + else if (IS_PULSE(duration)) \ + duration -= (amount); \ + } while (0) + +#define TO_UNITS(duration, unit_len) \ + ((int)((duration) > 0 ? \ + DIV_ROUND_CLOSEST(abs((duration)), (unit_len)) :\ + -DIV_ROUND_CLOSEST(abs((duration)), (unit_len)))) +#define TO_US(duration) ((int)TO_UNITS(duration, 1000)) + +/* + * Routines from ir-keytable.c to be used internally on ir-core and decoders + */ + +u32 ir_g_keycode_from_table(struct input_dev *input_dev, + u32 scancode); + +/* + * 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); +static inline void ir_raw_event_reset(struct input_dev *input_dev) +{ + ir_raw_event_store(input_dev, 0); + ir_raw_event_handle(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 + +#endif /* _IR_RAW_EVENT */ |