Add an img-ir module for decoding the Sanyo infrared protocol.
Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
Cc: Mauro Carvalho Chehab <m.chehab@xxxxxxxxxxx>
Cc: linux-media@xxxxxxxxxxxxxxx
---
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
Sanyo 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-sanyo.c | 122 +++++++++++++++++++++++++++++++++
4 files changed, 134 insertions(+)
create mode 100644 drivers/media/rc/img-ir/img-ir-sanyo.c
diff --git a/drivers/media/rc/img-ir/Kconfig b/drivers/media/rc/img-ir/Kconfig
index 48627f9..03ba9fc 100644
--- a/drivers/media/rc/img-ir/Kconfig
+++ b/drivers/media/rc/img-ir/Kconfig
@@ -52,3 +52,10 @@ config IR_IMG_SHARP
help
Say Y here to enable support for the Sharp protocol in the ImgTec
infrared decoder block.
+
+config IR_IMG_SANYO
+ bool "Sanyo protocol support"
+ depends on IR_IMG_HW
+ help
+ Say Y here to enable support for the Sanyo protocol (used by Sanyo,
+ Aiwa, Chinon remotes) in the ImgTec infrared decoder block.
diff --git a/drivers/media/rc/img-ir/Makefile b/drivers/media/rc/img-ir/Makefile
index 792a3c4..92a459d 100644
--- a/drivers/media/rc/img-ir/Makefile
+++ b/drivers/media/rc/img-ir/Makefile
@@ -5,6 +5,7 @@ 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-$(CONFIG_IR_IMG_SANYO) += img-ir-sanyo.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 fc84b75..0e71426 100644
--- a/drivers/media/rc/img-ir/img-ir-hw.c
+++ b/drivers/media/rc/img-ir/img-ir-hw.c
@@ -24,6 +24,7 @@ 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;
+extern struct img_ir_decoder img_ir_sanyo;
static bool img_ir_decoders_preprocessed;
static struct img_ir_decoder *img_ir_decoders[] = {
@@ -39,6 +40,9 @@ static struct img_ir_decoder *img_ir_decoders[] = {
#ifdef CONFIG_IR_IMG_SHARP
&img_ir_sharp,
#endif
+#ifdef CONFIG_IR_IMG_SANYO
+ &img_ir_sanyo,
+#endif
NULL
};
diff --git a/drivers/media/rc/img-ir/img-ir-sanyo.c b/drivers/media/rc/img-ir/img-ir-sanyo.c
new file mode 100644
index 0000000..c2c763e
--- /dev/null
+++ b/drivers/media/rc/img-ir/img-ir-sanyo.c
@@ -0,0 +1,122 @@
+/*
+ * ImgTec IR Decoder setup for Sanyo protocol.
+ *
+ * Copyright 2012-2014 Imagination Technologies Ltd.
+ *
+ * From ir-sanyo-decoder.c:
+ *
+ * This protocol uses the NEC protocol timings. However, data is formatted as:
+ * 13 bits Custom Code
+ * 13 bits NOT(Custom Code)
+ * 8 bits Key data
+ * 8 bits NOT(Key data)
+ *
+ * According with LIRC, this protocol is used on Sanyo, Aiwa and Chinon
+ * Information for this protocol is available at the Sanyo LC7461 datasheet.
+ */
+
+#include "img-ir-hw.h"
+
+/* Convert Sanyo data to a scancode */
+static int img_ir_sanyo_scancode(int len, u64 raw, int *scancode, u64 protocols)
+{
+ unsigned int addr, addr_inv, data, data_inv;
+ /* a repeat code has no data */
+ if (!len)
+ return IMG_IR_REPEATCODE;
+ if (len != 42)
+ return -EINVAL;
+ addr = (raw >> 0) & 0x1fff;
+ addr_inv = (raw >> 13) & 0x1fff;
+ data = (raw >> 26) & 0xff;
+ data_inv = (raw >> 34) & 0xff;
+ /* Validate data */
+ if ((data_inv ^ data) != 0xff)
+ return -EINVAL;
+ /* Validate address */
+ if ((addr_inv ^ addr) != 0x1fff)
+ return -EINVAL;
+
+ /* Normal Sanyo */
+ *scancode = addr << 8 | data;
+ return IMG_IR_SCANCODE;
+}
+
+/* Convert Sanyo scancode to Sanyo data filter */
+static int img_ir_sanyo_filter(const struct rc_scancode_filter *in,
+ struct img_ir_filter *out, u64 protocols)
+{
+ unsigned int addr, addr_inv, data, data_inv;
+ unsigned int addr_m, data_m;
+
+ data = in->data & 0xff;
+ data_m = in->mask & 0xff;
+ data_inv = data ^ 0xff;
+
+ if (in->data & 0xff700000)
+ return -EINVAL;
+
+ addr = (in->data >> 8) & 0x1fff;
+ addr_m = (in->mask >> 8) & 0x1fff;
+ addr_inv = addr ^ 0x1fff;
+
+ out->data = (u64)data_inv << 34 |
+ (u64)data << 26 |
+ addr_inv << 13 |
+ addr;
+ out->mask = (u64)data_m << 34 |
+ (u64)data_m << 26 |
+ addr_m << 13 |
+ addr_m;
+ return 0;
+}
+
+/* Sanyo decoder */
+struct img_ir_decoder img_ir_sanyo = {
+ .type = RC_BIT_SANYO,
+ .control = {
+ .decoden = 1,
+ .code_type = IMG_IR_CODETYPE_PULSEDIST,
+ },
+ /* main timings */
+ .unit = 562500, /* 562.5 us */
+ .timings = {
+ /* leader symbol */
+ .ldr = {
+ .pulse = { 16 /* 9ms */ },
+ .space = { 8 /* 4.5ms */ },
+ },
+ /* 0 symbol */
+ .s00 = {
+ .pulse = { 1 /* 562.5 us */ },
+ .space = { 1 /* 562.5 us */ },
+ },
+ /* 1 symbol */
+ .s01 = {
+ .pulse = { 1 /* 562.5 us */ },
+ .space = { 3 /* 1687.5 us */ },
+ },
+ /* free time */
+ .ft = {
+ .minlen = 42,
+ .maxlen = 42,
+ .ft_min = 10, /* 5.625 ms */
+ },
+ },
+ /* repeat codes */
+ .repeat = 108, /* 108 ms */
+ .rtimings = {
+ /* leader symbol */
+ .ldr = {
+ .space = { 4 /* 2.25 ms */ },
+ },
+ /* free time */
+ .ft = {
+ .minlen = 0, /* repeat code has no data */
+ .maxlen = 0,
+ },
+ },
+ /* scancode logic */
+ .scancode = img_ir_sanyo_scancode,
+ .filter = img_ir_sanyo_filter,
+};
--
1.8.3.2
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