From 3c11305eee6a13695954dbc067234d492cb7879c Mon Sep 17 00:00:00 2001 From: James Hogan Date: Fri, 28 Feb 2014 20:28:59 -0300 Subject: [PATCH] [media] rc: img-ir: add Sharp decoder module Add an img-ir module for decoding the Sharp infrared protocol. Signed-off-by: James Hogan 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 | 4 ++ drivers/media/rc/img-ir/img-ir-sharp.c | 99 ++++++++++++++++++++++++++ 4 files changed, 111 insertions(+) create mode 100644 drivers/media/rc/img-ir/img-ir-sharp.c diff --git a/drivers/media/rc/img-ir/Kconfig b/drivers/media/rc/img-ir/Kconfig index ab365778b5d2..48627f9741be 100644 --- a/drivers/media/rc/img-ir/Kconfig +++ b/drivers/media/rc/img-ir/Kconfig @@ -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. diff --git a/drivers/media/rc/img-ir/Makefile b/drivers/media/rc/img-ir/Makefile index 978c0c6713ab..792a3c4bc38f 100644 --- a/drivers/media/rc/img-ir/Makefile +++ b/drivers/media/rc/img-ir/Makefile @@ -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 diff --git a/drivers/media/rc/img-ir/img-ir-hw.c b/drivers/media/rc/img-ir/img-ir-hw.c index 0d4f9211f9f2..9931dfaeb6ad 100644 --- a/drivers/media/rc/img-ir/img-ir-hw.c +++ b/drivers/media/rc/img-ir/img-ir-hw.c @@ -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 }; diff --git a/drivers/media/rc/img-ir/img-ir-sharp.c b/drivers/media/rc/img-ir/img-ir-sharp.c new file mode 100644 index 000000000000..3397cc5a6794 --- /dev/null +++ b/drivers/media/rc/img-ir/img-ir-sharp.c @@ -0,0 +1,99 @@ +/* + * 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, +}; -- 2.20.1