Add an img-ir module for decoding the Sharp 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-sharp.c | 115 +++++++++++++++++++++++++++++++++
3 files changed, 123 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 38505188df0e..24e0966a3220 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 or M here to enable support for the Sony protocol in the ImgTec
infrared decoder block.
+
+config IR_IMG_SHARP
+ tristate "Sharp protocol support"
+ depends on IR_IMG && IR_IMG_HW
+ help
+ Say Y or M 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 f3e7cc4f32e4..3c3ab4f1a9f1 100644
--- a/drivers/media/rc/img-ir/Makefile
+++ b/drivers/media/rc/img-ir/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_IR_IMG) += img-ir.o
obj-$(CONFIG_IR_IMG_NEC) += img-ir-nec.o
obj-$(CONFIG_IR_IMG_JVC) += img-ir-jvc.o
obj-$(CONFIG_IR_IMG_SONY) += img-ir-sony.o
+obj-$(CONFIG_IR_IMG_SHARP) += img-ir-sharp.o
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..4d70abc088b4
--- /dev/null
+++ b/drivers/media/rc/img-ir/img-ir-sharp.c
@@ -0,0 +1,115 @@
+/*
+ * ImgTec IR Decoder setup for Sharp protocol.
+ *
+ * Copyright 2012-2013 Imagination Technologies Ltd.
+ */
+
+#include <linux/module.h>
+
+#include "img-ir-hw.h"
+
+/* Convert Sharp data to a scancode */
+static int img_ir_sharp_scancode(int len, u64 raw, u64 protocols)
+{
+ unsigned int addr, cmd, exp, chk;
+
+ if (len != 15)
+ return IMG_IR_ERR_INVALID;
+
+ addr = (raw >> 0) & 0x1f;
+ cmd = (raw >> 5) & 0xff;
+ exp = (raw >> 13) & 0x1;
+ chk = (raw >> 14) & 0x1;
+
+ /* validate data */
+ if (!exp)
+ return IMG_IR_ERR_INVALID;
+ if (chk)
+ /* probably the second half of the message */
+ return IMG_IR_ERR_INVALID;
+
+ return addr << 8 | cmd;
+}
+
+/* Convert Sharp scancode to Sharp data filter */
+static int img_ir_sharp_filter(const struct img_ir_sc_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
+ */
+static 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 */
+ .timings = {
+ /* 0 symbol */
+ .s10 = {
+ .pulse = { 320 /* 320 us */ },
+ .space = { 680 /* 1 ms period */ },
+ },
+ /* 1 symbol */
+ .s11 = {
+ .pulse = { 320 /* 230 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,
+};
+
+static int __init img_ir_sharp_init(void)
+{
+ return img_ir_register_decoder(&img_ir_sharp);
+}
+module_init(img_ir_sharp_init);
+
+static void __exit img_ir_sharp_exit(void)
+{
+ img_ir_unregister_decoder(&img_ir_sharp);
+}
+module_exit(img_ir_sharp_exit);
+
+MODULE_AUTHOR("Imagination Technologies Ltd.");
+MODULE_DESCRIPTION("ImgTec IR Sharp protocol support");
+MODULE_LICENSE("GPL");
--
1.8.1.2
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