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

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

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
James Hogan 2014-02-28 20:28:57 -03:00 committed by Mauro Carvalho Chehab
parent 635abb7054
commit 6933653378
4 changed files with 104 additions and 0 deletions
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7
drivers/media/rc/img-ir/Kconfig
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@ -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.

1
drivers/media/rc/img-ir/Makefile
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@ -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

4
drivers/media/rc/img-ir/img-ir-hw.c
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@ -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
};

92
drivers/media/rc/img-ir/img-ir-jvc.c Normal file
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@ -0,0 +1,92 @@
/*
* 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,
};