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Commit 3c11305e authored by James Hogan's avatar James Hogan Committed by Mauro Carvalho Chehab
Browse files

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



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

Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent e72b21ab

drivers/media/rc/img-ir/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -45,3 +45,10 @@ config IR_IMG_SONY 
	help

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

	   infrared decoder block.



config IR_IMG_SHARP

	bool "Sharp protocol support"

	depends on IR_IMG_HW

	help

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

	   infrared decoder block.

drivers/media/rc/img-ir/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 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-$(CONFIG_IR_IMG_SONY)	+= img-ir-sony.o

img-ir-$(CONFIG_IR_IMG_SHARP)	+= img-ir-sharp.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
@@ -23,6 +23,7 @@ static DEFINE_SPINLOCK(img_ir_decoders_lock); 
extern struct img_ir_decoder img_ir_nec;

extern struct img_ir_decoder img_ir_jvc;

extern struct img_ir_decoder img_ir_sony;

extern struct img_ir_decoder img_ir_sharp;



static bool img_ir_decoders_preprocessed;

static struct img_ir_decoder *img_ir_decoders[] = {
@@ -34,6 +35,9 @@ static struct img_ir_decoder *img_ir_decoders[] = { 
#endif

#ifdef CONFIG_IR_IMG_SONY

	&img_ir_sony,

#endif

#ifdef CONFIG_IR_IMG_SHARP

	&img_ir_sharp,

#endif

	NULL

};

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

0 → 100644
+99 −0
Original line number Diff line number Diff line 
/*

 * ImgTec IR Decoder setup for Sharp protocol.

 *

 * Copyright 2012-2014 Imagination Technologies Ltd.

 */



#include "img-ir-hw.h"



/* Convert Sharp data to a scancode */

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

{

	unsigned int addr, cmd, exp, chk;



	if (len != 15)

		return -EINVAL;



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

	cmd  = (raw >>   5) & 0xff;

	exp  = (raw >>  13) &  0x1;

	chk  = (raw >>  14) &  0x1;



	/* validate data */

	if (!exp)

		return -EINVAL;

	if (chk)

		/* probably the second half of the message */

		return -EINVAL;



	*scancode = addr << 8 | cmd;

	return IMG_IR_SCANCODE;

}



/* Convert Sharp scancode to Sharp data filter */

static int img_ir_sharp_filter(const struct rc_scancode_filter *in,

			       struct img_ir_filter *out, u64 protocols)

{

	unsigned int addr, cmd, exp = 0, chk = 0;

	unsigned int addr_m, cmd_m, exp_m = 0, chk_m = 0;



	addr   = (in->data >> 8) & 0x1f;

	addr_m = (in->mask >> 8) & 0x1f;

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

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

	if (cmd_m) {

		/* if filtering commands, we can only match the first part */

		exp   = 1;

		exp_m = 1;

		chk   = 0;

		chk_m = 1;

	}



	out->data = addr        |

		    cmd   <<  5 |

		    exp   << 13 |

		    chk   << 14;

	out->mask = addr_m      |

		    cmd_m <<  5 |

		    exp_m << 13 |

		    chk_m << 14;



	return 0;

}



/*

 * Sharp decoder

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

 */

struct img_ir_decoder img_ir_sharp = {

	.type = RC_BIT_SHARP,

	.control = {

		.decoden = 0,

		.decodend2 = 1,

		.code_type = IMG_IR_CODETYPE_PULSEDIST,

		.d1validsel = 1,

	},

	/* main timings */

	.tolerance = 20,	/* 20% */

	.timings = {

		/* 0 symbol */

		.s10 = {

			.pulse = { 320	/* 320 us */ },

			.space = { 680	/* 1 ms period */ },

		},

		/* 1 symbol */

		.s11 = {

			.pulse = { 320	/* 320 us */ },

			.space = { 1680	/* 2 ms period */ },

		},

		/* free time */

		.ft = {

			.minlen = 15,

			.maxlen = 15,

			.ft_min = 5000,	/* 5 ms */

		},

	},

	/* scancode logic */

	.scancode = img_ir_sharp_scancode,

	.filter = img_ir_sharp_filter,

};