@@ -45,3 +45,10 @@ config IR_IMG_SONY
help
Say Y here to enable support for the Sony protocol in the ImgTec
infrared decoder block.
+
+config IR_IMG_SHARP
+ bool "Sharp protocol support"
+ depends on IR_IMG_HW
+ help
+ Say Y here to enable support for the Sharp protocol in the ImgTec
+ infrared decoder block.
@@ -4,6 +4,7 @@ img-ir-$(CONFIG_IR_IMG_HW) += img-ir-hw.o
img-ir-$(CONFIG_IR_IMG_NEC) += img-ir-nec.o
img-ir-$(CONFIG_IR_IMG_JVC) += img-ir-jvc.o
img-ir-$(CONFIG_IR_IMG_SONY) += img-ir-sony.o
+img-ir-$(CONFIG_IR_IMG_SHARP) += img-ir-sharp.o
img-ir-objs := $(img-ir-y)
obj-$(CONFIG_IR_IMG) += img-ir.o
@@ -23,6 +23,7 @@ static DEFINE_SPINLOCK(img_ir_decoders_lock);
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;
static bool img_ir_decoders_preprocessed;
static struct img_ir_decoder *img_ir_decoders[] = {
@@ -35,6 +36,9 @@ static struct img_ir_decoder *img_ir_decoders[] = {
#ifdef CONFIG_IR_IMG_SONY
&img_ir_sony,
#endif
+#ifdef CONFIG_IR_IMG_SHARP
+ &img_ir_sharp,
+#endif
NULL
};
new file mode 100644
@@ -0,0 +1,99 @@
+/*
+ * ImgTec IR Decoder setup for Sharp protocol.
+ *
+ * Copyright 2012-2014 Imagination Technologies Ltd.
+ */
+
+#include "img-ir-hw.h"
+
+/* Convert Sharp data to a scancode */
+static int img_ir_sharp_scancode(int len, u64 raw, int *scancode, u64 protocols)
+{
+ unsigned int addr, cmd, exp, chk;
+
+ if (len != 15)
+ return -EINVAL;
+
+ addr = (raw >> 0) & 0x1f;
+ cmd = (raw >> 5) & 0xff;
+ exp = (raw >> 13) & 0x1;
+ chk = (raw >> 14) & 0x1;
+
+ /* validate data */
+ if (!exp)
+ return -EINVAL;
+ if (chk)
+ /* probably the second half of the message */
+ return -EINVAL;
+
+ *scancode = addr << 8 | cmd;
+ return IMG_IR_SCANCODE;
+}
+
+/* Convert Sharp scancode to Sharp data filter */
+static int img_ir_sharp_filter(const struct rc_scancode_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
+ */
+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 */
+ .tolerance = 20, /* 20% */
+ .timings = {
+ /* 0 symbol */
+ .s10 = {
+ .pulse = { 320 /* 320 us */ },
+ .space = { 680 /* 1 ms period */ },
+ },
+ /* 1 symbol */
+ .s11 = {
+ .pulse = { 320 /* 320 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,
+};
Add an img-ir module for decoding the Sharp infrared protocol. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Mauro Carvalho Chehab <m.chehab@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 Sharp directly to the list of decoders in img-ir-hw.c. - Fix typo in logic 1 pulse width comment. - Set tolerance to 20%, which seemed to be needed for the cases I have. --- 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-sharp.c | 99 ++++++++++++++++++++++++++++++++++ 4 files changed, 111 insertions(+) create mode 100644 drivers/media/rc/img-ir/img-ir-sharp.c