f5f2cc646a
This is a custom IR protocol decoder, for the RC-6-ish protocol used by the Microsoft Remote Keyboard, apparently developed internally at Microsoft, and officially dubbed MCIR-2, per their March 2011 remote and transceiver requirements and specifications document, which also touches on this IR keyboard/mouse device. Its a standard keyboard with embedded thumb stick mouse pointer and mouse buttons, along with a number of media keys. The media keys are standard RC-6, identical to the signals from the stock MCE remotes, and will be handled as such. The keyboard and mouse signals will be decoded and delivered to the system by an input device registered specifically by this driver. Successfully tested with multiple mceusb-driven transceivers, as well as with fintek-cir and redrat3 hardware. Essentially, any raw IR hardware with enough sampling resolution should be able to use this decoder, nothing about it is at all receiver-hardware-specific. This work is inspired by lirc_mod_mce: The documentation there and code aided in understanding and decoding the protocol, but the bulk of the code is actually borrowed more from the existing in-kernel decoders than anything. I did recycle the keyboard keycode table, a few defines, and some of the keyboard and mouse data parsing bits from lirc_mod_mce though. Special thanks to James Meyer for providing the hardware, and being patient with me as I took forever to get around to writing this. callback routine to ensure we don't get any stuck keys, and used symbolic names for the keytable. Also cc'ing Florian this time, who I believe is the original mod-mce author... CC: Florian Demski <fdemski@users.sourceforge.net> Signed-off-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
212 lines
5 KiB
C
212 lines
5 KiB
C
/*
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* Remote Controller core raw events header
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*
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* Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _RC_CORE_PRIV
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#define _RC_CORE_PRIV
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <media/rc-core.h>
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struct ir_raw_handler {
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struct list_head list;
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u64 protocols; /* which are handled by this handler */
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int (*decode)(struct rc_dev *dev, struct ir_raw_event event);
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/* These two should only be used by the lirc decoder */
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int (*raw_register)(struct rc_dev *dev);
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int (*raw_unregister)(struct rc_dev *dev);
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};
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struct ir_raw_event_ctrl {
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struct list_head list; /* to keep track of raw clients */
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struct task_struct *thread;
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spinlock_t lock;
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struct kfifo kfifo; /* fifo for the pulse/space durations */
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ktime_t last_event; /* when last event occurred */
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enum raw_event_type last_type; /* last event type */
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struct rc_dev *dev; /* pointer to the parent rc_dev */
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u64 enabled_protocols; /* enabled raw protocol decoders */
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/* raw decoder state follows */
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struct ir_raw_event prev_ev;
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struct ir_raw_event this_ev;
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struct nec_dec {
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int state;
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unsigned count;
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u32 bits;
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bool is_nec_x;
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bool necx_repeat;
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} nec;
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struct rc5_dec {
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int state;
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u32 bits;
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unsigned count;
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unsigned wanted_bits;
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} rc5;
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struct rc6_dec {
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int state;
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u8 header;
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u32 body;
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bool toggle;
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unsigned count;
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unsigned wanted_bits;
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} rc6;
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struct sony_dec {
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int state;
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u32 bits;
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unsigned count;
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} sony;
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struct jvc_dec {
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int state;
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u16 bits;
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u16 old_bits;
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unsigned count;
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bool first;
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bool toggle;
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} jvc;
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struct rc5_sz_dec {
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int state;
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u32 bits;
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unsigned count;
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unsigned wanted_bits;
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} rc5_sz;
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struct mce_kbd_dec {
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struct input_dev *idev;
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struct timer_list rx_timeout;
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char name[64];
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char phys[64];
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int state;
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u8 header;
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u32 body;
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unsigned count;
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unsigned wanted_bits;
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} mce_kbd;
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struct lirc_codec {
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struct rc_dev *dev;
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struct lirc_driver *drv;
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int carrier_low;
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ktime_t gap_start;
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u64 gap_duration;
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bool gap;
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bool send_timeout_reports;
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} lirc;
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};
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/* macros for IR decoders */
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static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
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{
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return d1 > (d2 - margin);
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}
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static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
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{
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return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
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}
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static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
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{
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return x->pulse != y->pulse;
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}
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static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
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{
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if (duration > ev->duration)
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ev->duration = 0;
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else
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ev->duration -= duration;
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}
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/* Returns true if event is normal pulse/space event */
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static inline bool is_timing_event(struct ir_raw_event ev)
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{
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return !ev.carrier_report && !ev.reset;
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}
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#define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000)
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#define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
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/*
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* Routines from rc-raw.c to be used internally and by decoders
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*/
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u64 ir_raw_get_allowed_protocols(void);
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int ir_raw_event_register(struct rc_dev *dev);
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void ir_raw_event_unregister(struct rc_dev *dev);
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int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
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void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
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void ir_raw_init(void);
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/*
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* Decoder initialization code
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*
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* Those load logic are called during ir-core init, and automatically
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* loads the compiled decoders for their usage with IR raw events
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*/
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/* from ir-nec-decoder.c */
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#ifdef CONFIG_IR_NEC_DECODER_MODULE
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#define load_nec_decode() request_module("ir-nec-decoder")
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#else
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#define load_nec_decode() 0
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#endif
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/* from ir-rc5-decoder.c */
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#ifdef CONFIG_IR_RC5_DECODER_MODULE
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#define load_rc5_decode() request_module("ir-rc5-decoder")
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#else
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#define load_rc5_decode() 0
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#endif
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/* from ir-rc6-decoder.c */
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#ifdef CONFIG_IR_RC6_DECODER_MODULE
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#define load_rc6_decode() request_module("ir-rc6-decoder")
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#else
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#define load_rc6_decode() 0
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#endif
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/* from ir-jvc-decoder.c */
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#ifdef CONFIG_IR_JVC_DECODER_MODULE
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#define load_jvc_decode() request_module("ir-jvc-decoder")
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#else
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#define load_jvc_decode() 0
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#endif
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/* from ir-sony-decoder.c */
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#ifdef CONFIG_IR_SONY_DECODER_MODULE
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#define load_sony_decode() request_module("ir-sony-decoder")
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#else
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#define load_sony_decode() 0
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#endif
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/* from ir-mce_kbd-decoder.c */
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#ifdef CONFIG_IR_MCE_KBD_DECODER_MODULE
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#define load_mce_kbd_decode() request_module("ir-mce_kbd-decoder")
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#else
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#define load_mce_kbd_decode() 0
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#endif
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/* from ir-lirc-codec.c */
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#ifdef CONFIG_IR_LIRC_CODEC_MODULE
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#define load_lirc_codec() request_module("ir-lirc-codec")
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#else
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#define load_lirc_codec() 0
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#endif
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#endif /* _RC_CORE_PRIV */
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