Add an img-ir module for decoding the JVC infrared protocol.
Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
Cc: Mauro Carvalho Chehab <m.chehab@xxxxxxxxxxx>
Cc: linux-media@xxxxxxxxxxxxxxx
---
drivers/media/rc/img-ir/Kconfig | 7 +++
drivers/media/rc/img-ir/Makefile | 1 +
drivers/media/rc/img-ir/img-ir-jvc.c | 109 +++++++++++++++++++++++++++++++++++
3 files changed, 117 insertions(+)
create mode 100644 drivers/media/rc/img-ir/img-ir-jvc.c
diff --git a/drivers/media/rc/img-ir/Kconfig b/drivers/media/rc/img-ir/Kconfig
index 44d00227c6c4..b7774a30509f 100644
--- a/drivers/media/rc/img-ir/Kconfig
+++ b/drivers/media/rc/img-ir/Kconfig
@@ -31,3 +31,10 @@ config IR_IMG_NEC
help
Say Y or M here to enable support for the NEC and extended NEC
protocols in the ImgTec infrared decoder block.
+
+config IR_IMG_JVC
+ tristate "JVC protocol support"
+ depends on IR_IMG && IR_IMG_HW
+ help
+ Say Y or M here to enable support for the JVC protocol in the ImgTec
+ infrared decoder block.
diff --git a/drivers/media/rc/img-ir/Makefile b/drivers/media/rc/img-ir/Makefile
index f3052878f092..1d9643801f02 100644
--- a/drivers/media/rc/img-ir/Makefile
+++ b/drivers/media/rc/img-ir/Makefile
@@ -5,3 +5,4 @@ img-ir-objs := $(img-ir-y)
obj-$(CONFIG_IR_IMG) += img-ir.o
obj-$(CONFIG_IR_IMG_NEC) += img-ir-nec.o
+obj-$(CONFIG_IR_IMG_JVC) += img-ir-jvc.o
diff --git a/drivers/media/rc/img-ir/img-ir-jvc.c b/drivers/media/rc/img-ir/img-ir-jvc.c
new file mode 100644
index 000000000000..a6f383afd2b3
--- /dev/null
+++ b/drivers/media/rc/img-ir/img-ir-jvc.c
@@ -0,0 +1,109 @@
+/*
+ * ImgTec IR Decoder setup for JVC protocol.
+ *
+ * Copyright 2012-2013 Imagination Technologies Ltd.
+ */
+
+#include <linux/module.h>
+
+#include "img-ir-hw.h"
+
+/* Convert JVC data to a scancode */
+static int img_ir_jvc_scancode(int len, u64 raw, u64 protocols)
+{
+ unsigned int cust, data;
+
+ if (len != 16)
+ return IMG_IR_ERR_INVALID;
+
+ cust = (raw >> 0) & 0xff;
+ data = (raw >> 8) & 0xff;
+
+ return cust << 8 | data;
+}
+
+/* Convert JVC scancode to JVC data filter */
+static int img_ir_jvc_filter(const struct img_ir_sc_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
+ */
+static 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,
+};
+
+static int __init img_ir_jvc_init(void)
+{
+ return img_ir_register_decoder(&img_ir_jvc);
+}
+module_init(img_ir_jvc_init);
+
+static void __exit img_ir_jvc_exit(void)
+{
+ img_ir_unregister_decoder(&img_ir_jvc);
+}
+module_exit(img_ir_jvc_exit);
+
+MODULE_AUTHOR("Imagination Technologies Ltd.");
+MODULE_DESCRIPTION("ImgTec IR JVC protocol support");
+MODULE_LICENSE("GPL");
--
1.8.1.2
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