Add an img-ir module for decoding the Sanyo 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
---
drivers/media/rc/img-ir/Kconfig | 7 ++
drivers/media/rc/img-ir/Makefile | 1 +
drivers/media/rc/img-ir/img-ir-sanyo.c | 139 +++++++++++++++++++++++++++++++++
3 files changed, 147 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 24e0966a3220..8c035b7c34e8 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 or M here to enable support for the Sharp protocol in the
ImgTec infrared decoder block.
+
+config IR_IMG_SANYO
+ tristate "Sanyo protocol support"
+ depends on IR_IMG && IR_IMG_HW
+ help
+ Say Y or M 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 3c3ab4f1a9f1..4f1e4305870d 100644
--- a/drivers/media/rc/img-ir/Makefile
+++ b/drivers/media/rc/img-ir/Makefile
@@ -8,3 +8,4 @@ obj-$(CONFIG_IR_IMG_NEC) += img-ir-nec.o
obj-$(CONFIG_IR_IMG_JVC) += img-ir-jvc.o
obj-$(CONFIG_IR_IMG_SONY) += img-ir-sony.o
obj-$(CONFIG_IR_IMG_SHARP) += img-ir-sharp.o
+obj-$(CONFIG_IR_IMG_SANYO) += img-ir-sanyo.o
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 000000000000..bfd44b4fd468
--- /dev/null
+++ b/drivers/media/rc/img-ir/img-ir-sanyo.c
@@ -0,0 +1,139 @@
+/*
+ * ImgTec IR Decoder setup for Sanyo protocol.
+ *
+ * Copyright 2012-2013 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 <linux/module.h>
+
+#include "img-ir-hw.h"
+
+/* Convert Sanyo data to a scancode */
+static int img_ir_sanyo_scancode(int len, u64 raw, 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 IMG_IR_ERR_INVALID;
+ 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 IMG_IR_ERR_INVALID;
+ /* Validate address */
+ if ((addr_inv ^ addr) != 0x1fff)
+ return IMG_IR_ERR_INVALID;
+
+ /* Normal Sanyo */
+ return addr << 8 | data;
+}
+
+/* Convert Sanyo scancode to Sanyo data filter */
+static int img_ir_sanyo_filter(const struct img_ir_sc_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 */
+static 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,
+};
+
+static int __init img_ir_sanyo_init(void)
+{
+ return img_ir_register_decoder(&img_ir_sanyo);
+}
+module_init(img_ir_sanyo_init);
+
+static void __exit img_ir_sanyo_exit(void)
+{
+ img_ir_unregister_decoder(&img_ir_sanyo);
+}
+module_exit(img_ir_sanyo_exit);
+
+MODULE_AUTHOR("Imagination Technologies Ltd.");
+MODULE_DESCRIPTION("ImgTec IR Sanyo protocol support");
+MODULE_LICENSE("GPL");
--
1.8.1.2
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