Add an img-ir module for decoding the JVC infrared protocol.
Signed-off-by: James Hogan <james.ho...@imgtec.com>
Cc: Mauro Carvalho Chehab <m.che...@samsung.com>
Cc: linux-media@vger.kernel.org
---
v2:
- Update to new scancode interface (32-bit NEC).
- Update to new filtering interface (generic struct rc_scancode_filter).
- Remove modularity and dynamic registration/unregistration, adding JVC
directly to the list of decoders in img-ir-hw.c.
---
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-jvc.c | 92 ++++++++++++++++++++++++++++++++++++
4 files changed, 104 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 28498a2..96006fbf 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 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.
diff --git a/drivers/media/rc/img-ir/Makefile b/drivers/media/rc/img-ir/Makefile
index c409197..c5f8f06 100644
--- a/drivers/media/rc/img-ir/Makefile
+++ b/drivers/media/rc/img-ir/Makefile
@@ -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
diff --git a/drivers/media/rc/img-ir/img-ir-hw.c
b/drivers/media/rc/img-ir/img-ir-hw.c
index 79ec495..fc8a58b 100644
--- a/drivers/media/rc/img-ir/img-ir-hw.c
+++ b/drivers/media/rc/img-ir/img-ir-hw.c
@@ -21,12 +21,16 @@
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
};
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 0000000..ae55867
--- /dev/null
+++ b/drivers/media/rc/img-ir/img-ir-jvc.c
@@ -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,
+};
--
1.8.3.2
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