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Commit 69336533 authored by James Hogan's avatar James Hogan Committed by Mauro Carvalho Chehab
Browse files

[media] rc: img-ir: add JVC decoder module 



Add an img-ir module for decoding the JVC infrared protocol.

Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent 635abb70

drivers/media/rc/img-ir/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -31,3 +31,10 @@ config IR_IMG_NEC 
	help

	   Say Y here to enable support for the NEC, extended NEC, and 32-bit

	   NEC protocols in the ImgTec infrared decoder block.



config IR_IMG_JVC

	bool "JVC protocol support"

	depends on IR_IMG_HW

	help

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

	   infrared decoder block.

drivers/media/rc/img-ir/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ img-ir-y := img-ir-core.o 
img-ir-$(CONFIG_IR_IMG_RAW)	+= img-ir-raw.o

img-ir-$(CONFIG_IR_IMG_HW)	+= img-ir-hw.o

img-ir-$(CONFIG_IR_IMG_NEC)	+= img-ir-nec.o

img-ir-$(CONFIG_IR_IMG_JVC)	+= img-ir-jvc.o

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



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

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

+4 −0
Original line number Diff line number Diff line
@@ -21,11 +21,15 @@ 
static DEFINE_SPINLOCK(img_ir_decoders_lock);



extern struct img_ir_decoder img_ir_nec;

extern struct img_ir_decoder img_ir_jvc;



static bool img_ir_decoders_preprocessed;

static struct img_ir_decoder *img_ir_decoders[] = {

#ifdef CONFIG_IR_IMG_NEC

	&img_ir_nec,

#endif

#ifdef CONFIG_IR_IMG_JVC

	&img_ir_jvc,

#endif

	NULL

};

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

0 → 100644
+92 −0
Original line number Diff line number Diff line 
/*

 * ImgTec IR Decoder setup for JVC protocol.

 *

 * Copyright 2012-2014 Imagination Technologies Ltd.

 */



#include "img-ir-hw.h"



/* Convert JVC data to a scancode */

static int img_ir_jvc_scancode(int len, u64 raw, int *scancode, u64 protocols)

{

	unsigned int cust, data;



	if (len != 16)

		return -EINVAL;



	cust = (raw >> 0) & 0xff;

	data = (raw >> 8) & 0xff;



	*scancode = cust << 8 | data;

	return IMG_IR_SCANCODE;

}



/* Convert JVC scancode to JVC data filter */

static int img_ir_jvc_filter(const struct rc_scancode_filter *in,

			     struct img_ir_filter *out, u64 protocols)

{

	unsigned int cust, data;

	unsigned int cust_m, data_m;



	cust   = (in->data >> 8) & 0xff;

	cust_m = (in->mask >> 8) & 0xff;

	data   = (in->data >> 0) & 0xff;

	data_m = (in->mask >> 0) & 0xff;



	out->data = cust   | data << 8;

	out->mask = cust_m | data_m << 8;



	return 0;

}



/*

 * JVC decoder

 * See also http://www.sbprojects.com/knowledge/ir/jvc.php

 *          http://support.jvc.com/consumer/support/documents/RemoteCodes.pdf

 */

struct img_ir_decoder img_ir_jvc = {

	.type = RC_BIT_JVC,

	.control = {

		.decoden = 1,

		.code_type = IMG_IR_CODETYPE_PULSEDIST,

		.decodend2 = 1,

	},

	/* main timings */

	.unit = 527500, /* 527.5 us */

	.timings = {

		/* leader symbol */

		.ldr = {

			.pulse = { 16	/* 8.44 ms */ },

			.space = { 8	/* 4.22 ms */ },

		},

		/* 0 symbol */

		.s00 = {

			.pulse = { 1	/* 527.5 us +-60 us */ },

			.space = { 1	/* 527.5 us */ },

		},

		/* 1 symbol */

		.s01 = {

			.pulse = { 1	/* 527.5 us +-60 us */ },

			.space = { 3	/* 1.5825 ms +-40 us */ },

		},

		/* 0 symbol (no leader) */

		.s00 = {

			.pulse = { 1	/* 527.5 us +-60 us */ },

			.space = { 1	/* 527.5 us */ },

		},

		/* 1 symbol (no leader) */

		.s01 = {

			.pulse = { 1	/* 527.5 us +-60 us */ },

			.space = { 3	/* 1.5825 ms +-40 us */ },

		},

		/* free time */

		.ft = {

			.minlen = 16,

			.maxlen = 16,

			.ft_min = 10,	/* 5.275 ms */

		},

	},

	/* scancode logic */

	.scancode = img_ir_jvc_scancode,

	.filter = img_ir_jvc_filter,

};