Commit aa7383db authored by Sifan Naeem's avatar Sifan Naeem Committed by Mauro Carvalho Chehab
Browse files

[media] rc: img-ir: add philips rc5 decoder module 



Add img-ir module for decoding Philips rc5 protocol.

Signed-off-by: default avatarSifan Naeem <sifan.naeem@imgtec.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent 02744c8c

drivers/media/rc/img-ir/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -60,3 +60,10 @@ config IR_IMG_SANYO 
	help

	   Say Y here to enable support for the Sanyo protocol (used by Sanyo,

	   Aiwa, Chinon remotes) in the ImgTec infrared decoder block.



config IR_IMG_RC5

	bool "Philips RC5 protocol support"

	depends on IR_IMG_HW

	help

	   Say Y here to enable support for the RC5 protocol in the ImgTec

	   infrared decoder block.

drivers/media/rc/img-ir/Makefile

+1 −0
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@@ -6,6 +6,7 @@ img-ir-$(CONFIG_IR_IMG_JVC) += img-ir-jvc.o 
img-ir-$(CONFIG_IR_IMG_SONY)	+= img-ir-sony.o

img-ir-$(CONFIG_IR_IMG_SHARP)	+= img-ir-sharp.o

img-ir-$(CONFIG_IR_IMG_SANYO)	+= img-ir-sanyo.o

img-ir-$(CONFIG_IR_IMG_RC5)	+= img-ir-rc5.o

img-ir-objs			:= $(img-ir-y)



obj-$(CONFIG_IR_IMG)		+= img-ir.o

drivers/media/rc/img-ir/img-ir-hw.c

+3 −0
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@@ -41,6 +41,9 @@ static struct img_ir_decoder *img_ir_decoders[] = { 
#endif

#ifdef CONFIG_IR_IMG_SANYO

	&img_ir_sanyo,

#endif

#ifdef CONFIG_IR_IMG_RC5

	&img_ir_rc5,

#endif

	NULL

};

drivers/media/rc/img-ir/img-ir-hw.h

+1 −0
Original line number Diff line number Diff line
@@ -187,6 +187,7 @@ extern struct img_ir_decoder img_ir_jvc; 
extern struct img_ir_decoder img_ir_sony;

extern struct img_ir_decoder img_ir_sharp;

extern struct img_ir_decoder img_ir_sanyo;

extern struct img_ir_decoder img_ir_rc5;



/**

 * struct img_ir_reg_timings - Reg values for decoder timings at clock rate.

drivers/media/rc/img-ir/img-ir-rc5.c

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+88 −0
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/*

 * ImgTec IR Decoder setup for Philips RC-5 protocol.

 *

 * Copyright 2012-2014 Imagination Technologies Ltd.

 *

 * 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; either version 2 of the License, or (at your

 * option) any later version.

 */



#include "img-ir-hw.h"



/* Convert RC5 data to a scancode */

static int img_ir_rc5_scancode(int len, u64 raw, u64 enabled_protocols,

				struct img_ir_scancode_req *request)

{

	unsigned int addr, cmd, tgl, start;



	/* Quirk in the decoder shifts everything by 2 to the left. */

	raw   >>= 2;



	start	=  (raw >> 13)	& 0x01;

	tgl	=  (raw >> 11)	& 0x01;

	addr	=  (raw >>  6)	& 0x1f;

	cmd	=   raw		& 0x3f;

	/*

	 * 12th bit is used to extend the command in extended RC5 and has

	 * no effect on standard RC5.

	 */

	cmd	+= ((raw >> 12) & 0x01) ? 0 : 0x40;



	if (!start)

		return -EINVAL;



	request->protocol = RC_TYPE_RC5;

	request->scancode = addr << 8 | cmd;

	request->toggle   = tgl;

	return IMG_IR_SCANCODE;

}



/* Convert RC5 scancode to RC5 data filter */

static int img_ir_rc5_filter(const struct rc_scancode_filter *in,

				 struct img_ir_filter *out, u64 protocols)

{

	/* Not supported by the hw. */

	return -EINVAL;

}



/*

 * RC-5 decoder

 * see http://www.sbprojects.com/knowledge/ir/rc5.php

 */

struct img_ir_decoder img_ir_rc5 = {

	.type      = RC_BIT_RC5,

	.control   = {

		.bitoriend2	= 1,

		.code_type	= IMG_IR_CODETYPE_BIPHASE,

		.decodend2	= 1,

	},

	/* main timings */

	.tolerance	= 16,

	.unit		= 888888, /* 1/36k*32=888.888microseconds */

	.timings	= {

		/* 10 symbol */

		.s10 = {

			.pulse	= { 1 },

			.space	= { 1 },

		},



		/* 11 symbol */

		.s11 = {

			.pulse	= { 1 },

			.space	= { 1 },

		},



		/* free time */

		.ft  = {

			.minlen = 14,

			.maxlen = 14,

			.ft_min = 5,

		},

	},



	/* scancode logic */

	.scancode	= img_ir_rc5_scancode,

	.filter		= img_ir_rc5_filter,

};