diff options
Diffstat (limited to 'drivers/media/rc/rc-core-priv.h')
| -rw-r--r-- | drivers/media/rc/rc-core-priv.h | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/drivers/media/rc/rc-core-priv.h b/drivers/media/rc/rc-core-priv.h new file mode 100644 index 00000000000..873b3878975 --- /dev/null +++ b/drivers/media/rc/rc-core-priv.h @@ -0,0 +1,193 @@ +/* + * 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 _RC_CORE_PRIV +#define _RC_CORE_PRIV + +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <media/rc-core.h> + +struct ir_raw_handler { + struct list_head list; + + u64 protocols; /* which are handled by this handler */ + int (*decode)(struct rc_dev *dev, struct ir_raw_event event); + + /* These two should only be used by the lirc decoder */ + int (*raw_register)(struct rc_dev *dev); + int (*raw_unregister)(struct rc_dev *dev); +}; + +struct ir_raw_event_ctrl { + struct list_head list; /* to keep track of raw clients */ + struct task_struct *thread; + spinlock_t lock; + 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 rc_dev *dev; /* pointer to the parent rc_dev */ + u64 enabled_protocols; /* enabled raw protocol decoders */ + + /* raw decoder state follows */ + struct ir_raw_event prev_ev; + struct ir_raw_event this_ev; + struct nec_dec { + int state; + unsigned count; + u32 bits; + bool is_nec_x; + bool necx_repeat; + } nec; + struct rc5_dec { + int state; + u32 bits; + unsigned count; + unsigned wanted_bits; + } rc5; + struct rc6_dec { + int state; + u8 header; + u32 body; + bool toggle; + unsigned count; + unsigned wanted_bits; + } rc6; + struct sony_dec { + int state; + u32 bits; + unsigned count; + } sony; + struct jvc_dec { + int state; + u16 bits; + u16 old_bits; + unsigned count; + bool first; + bool toggle; + } jvc; + struct rc5_sz_dec { + int state; + u32 bits; + unsigned count; + unsigned wanted_bits; + } rc5_sz; + struct lirc_codec { + struct rc_dev *dev; + struct lirc_driver *drv; + int carrier_low; + + ktime_t gap_start; + u64 gap_duration; + bool gap; + bool send_timeout_reports; + + } lirc; +}; + +/* 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; +} + +/* Returns true if event is normal pulse/space event */ +static inline bool is_timing_event(struct ir_raw_event ev) +{ + return !ev.carrier_report && !ev.reset; +} + +#define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000) +#define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space") + +/* + * Routines from rc-raw.c to be used internally and by decoders + */ +u64 ir_raw_get_allowed_protocols(void); +int ir_raw_event_register(struct rc_dev *dev); +void ir_raw_event_unregister(struct rc_dev *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 + +/* from ir-lirc-codec.c */ +#ifdef CONFIG_IR_LIRC_CODEC_MODULE +#define load_lirc_codec() request_module("ir-lirc-codec") +#else +#define load_lirc_codec() 0 +#endif + + +#endif /* _RC_CORE_PRIV */ |