From aa7383db35aec23906868a632a964b5783a5254d Mon Sep 17 00:00:00 2001 From: Sifan Naeem Date: Thu, 11 Dec 2014 17:06:25 -0300 Subject: [media] rc: img-ir: add philips rc5 decoder module Add img-ir module for decoding Philips rc5 protocol. Signed-off-by: Sifan Naeem Signed-off-by: Mauro Carvalho Chehab --- drivers/media/rc/img-ir/Kconfig | 7 +++ drivers/media/rc/img-ir/Makefile | 1 + drivers/media/rc/img-ir/img-ir-hw.c | 3 ++ drivers/media/rc/img-ir/img-ir-hw.h | 1 + drivers/media/rc/img-ir/img-ir-rc5.c | 88 ++++++++++++++++++++++++++++++++++++ 5 files changed, 100 insertions(+) create mode 100644 drivers/media/rc/img-ir/img-ir-rc5.c (limited to 'drivers/media/rc/img-ir') diff --git a/drivers/media/rc/img-ir/Kconfig b/drivers/media/rc/img-ir/Kconfig index 580715c7fc5e..b20b3e9b441e 100644 --- a/drivers/media/rc/img-ir/Kconfig +++ b/drivers/media/rc/img-ir/Kconfig @@ -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. diff --git a/drivers/media/rc/img-ir/Makefile b/drivers/media/rc/img-ir/Makefile index 92a459d99509..898b1b8086d0 100644 --- a/drivers/media/rc/img-ir/Makefile +++ b/drivers/media/rc/img-ir/Makefile @@ -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 diff --git a/drivers/media/rc/img-ir/img-ir-hw.c b/drivers/media/rc/img-ir/img-ir-hw.c index 5c32f05b32ec..13f0b1e0e211 100644 --- a/drivers/media/rc/img-ir/img-ir-hw.c +++ b/drivers/media/rc/img-ir/img-ir-hw.c @@ -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 }; diff --git a/drivers/media/rc/img-ir/img-ir-hw.h b/drivers/media/rc/img-ir/img-ir-hw.h index b31ffc947e41..b9e799d57d99 100644 --- a/drivers/media/rc/img-ir/img-ir-hw.h +++ b/drivers/media/rc/img-ir/img-ir-hw.h @@ -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. diff --git a/drivers/media/rc/img-ir/img-ir-rc5.c b/drivers/media/rc/img-ir/img-ir-rc5.c new file mode 100644 index 000000000000..a8a28a377eee --- /dev/null +++ b/drivers/media/rc/img-ir/img-ir-rc5.c @@ -0,0 +1,88 @@ +/* + * 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, +}; -- cgit v1.2.3