Add an img-ir module for decoding the Sony 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 Sony
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-sony.c | 145 ++++++++++++++++++++++++++++++++++
4 files changed, 157 insertions(+)
create mode 100644 drivers/media/rc/img-ir/img-ir-sony.c
diff --git a/drivers/media/rc/img-ir/Kconfig b/drivers/media/rc/img-ir/Kconfig
index 96006fbf..ab36577 100644
--- a/drivers/media/rc/img-ir/Kconfig
+++ b/drivers/media/rc/img-ir/Kconfig
@@ -38,3 +38,10 @@ config IR_IMG_JVC
help
Say Y here to enable support for the JVC protocol in the ImgTec
infrared decoder block.
+
+config IR_IMG_SONY
+ bool "Sony protocol support"
+ depends on IR_IMG_HW
+ help
+ Say Y here to enable support for the Sony protocol in the ImgTec
+ infrared decoder block.
diff --git a/drivers/media/rc/img-ir/Makefile b/drivers/media/rc/img-ir/Makefile
index c5f8f06..978c0c6 100644
--- a/drivers/media/rc/img-ir/Makefile
+++ b/drivers/media/rc/img-ir/Makefile
@@ -3,6 +3,7 @@ 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-$(CONFIG_IR_IMG_SONY) += img-ir-sony.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 fc8a58b..17fb527 100644
--- a/drivers/media/rc/img-ir/img-ir-hw.c
+++ b/drivers/media/rc/img-ir/img-ir-hw.c
@@ -22,6 +22,7 @@ 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;
static bool img_ir_decoders_preprocessed;
static struct img_ir_decoder *img_ir_decoders[] = {
@@ -31,6 +32,9 @@ static struct img_ir_decoder *img_ir_decoders[] = {
#ifdef CONFIG_IR_IMG_JVC
&img_ir_jvc,
#endif
+#ifdef CONFIG_IR_IMG_SONY
+ &img_ir_sony,
+#endif
NULL
};
diff --git a/drivers/media/rc/img-ir/img-ir-sony.c b/drivers/media/rc/img-ir/img-ir-sony.c
new file mode 100644
index 0000000..993409a
--- /dev/null
+++ b/drivers/media/rc/img-ir/img-ir-sony.c
@@ -0,0 +1,145 @@
+/*
+ * ImgTec IR Decoder setup for Sony (SIRC) protocol.
+ *
+ * Copyright 2012-2014 Imagination Technologies Ltd.
+ */
+
+#include "img-ir-hw.h"
+
+/* Convert Sony data to a scancode */
+static int img_ir_sony_scancode(int len, u64 raw, int *scancode, u64 protocols)
+{
+ unsigned int dev, subdev, func;
+
+ switch (len) {
+ case 12:
+ if (!(protocols & RC_BIT_SONY12))
+ return -EINVAL;
+ func = raw & 0x7f; /* first 7 bits */
+ raw >>= 7;
+ dev = raw & 0x1f; /* next 5 bits */
+ subdev = 0;
+ break;
+ case 15:
+ if (!(protocols & RC_BIT_SONY15))
+ return -EINVAL;
+ func = raw & 0x7f; /* first 7 bits */
+ raw >>= 7;
+ dev = raw & 0xff; /* next 8 bits */
+ subdev = 0;
+ break;
+ case 20:
+ if (!(protocols & RC_BIT_SONY20))
+ return -EINVAL;
+ func = raw & 0x7f; /* first 7 bits */
+ raw >>= 7;
+ dev = raw & 0x1f; /* next 5 bits */
+ raw >>= 5;
+ subdev = raw & 0xff; /* next 8 bits */
+ break;
+ default:
+ return -EINVAL;
+ }
+ *scancode = dev << 16 | subdev << 8 | func;
+ return IMG_IR_SCANCODE;
+}
+
+/* Convert NEC scancode to NEC data filter */
+static int img_ir_sony_filter(const struct rc_scancode_filter *in,
+ struct img_ir_filter *out, u64 protocols)
+{
+ unsigned int dev, subdev, func;
+ unsigned int dev_m, subdev_m, func_m;
+ unsigned int len = 0;
+
+ dev = (in->data >> 16) & 0xff;
+ dev_m = (in->mask >> 16) & 0xff;
+ subdev = (in->data >> 8) & 0xff;
+ subdev_m = (in->mask >> 8) & 0xff;
+ func = (in->data >> 0) & 0x7f;
+ func_m = (in->mask >> 0) & 0x7f;
+
+ if (subdev & subdev_m) {
+ /* can't encode subdev and higher device bits */
+ if (dev & dev_m & 0xe0)
+ return -EINVAL;
+ /* subdevice (extended) bits only in 20 bit encoding */
+ if (!(protocols & RC_BIT_SONY20))
+ return -EINVAL;
+ len = 20;
+ dev_m &= 0x1f;
+ } else if (dev & dev_m & 0xe0) {
+ /* upper device bits only in 15 bit encoding */
+ if (!(protocols & RC_BIT_SONY15))
+ return -EINVAL;
+ len = 15;
+ subdev_m = 0;
+ } else {
+ /*
+ * The hardware mask cannot distinguish high device bits and low
+ * extended bits, so logically AND those bits of the masks
+ * together.
+ */
+ subdev_m &= (dev_m >> 5) | 0xf8;
+ dev_m &= 0x1f;
+ }
+
+ /* ensure there aren't any bits straying between fields */
+ dev &= dev_m;
+ subdev &= subdev_m;
+
+ /* write the hardware filter */
+ out->data = func |
+ dev << 7 |
+ subdev << 15;
+ out->mask = func_m |
+ dev_m << 7 |
+ subdev_m << 15;
+
+ if (len) {
+ out->minlen = len;
+ out->maxlen = len;
+ }
+ return 0;
+}
+
+/*
+ * Sony SIRC decoder
+ * See also http://www.sbprojects.com/knowledge/ir/sirc.php
+ * http://picprojects.org.uk/projects/sirc/sonysirc.pdf
+ */
+struct img_ir_decoder img_ir_sony = {
+ .type = RC_BIT_SONY12 | RC_BIT_SONY15 | RC_BIT_SONY20,
+ .control = {
+ .decoden = 1,
+ .code_type = IMG_IR_CODETYPE_PULSELEN,
+ },
+ /* main timings */
+ .unit = 600000, /* 600 us */
+ .timings = {
+ /* leader symbol */
+ .ldr = {
+ .pulse = { 4 /* 2.4 ms */ },
+ .space = { 1 /* 600 us */ },
+ },
+ /* 0 symbol */
+ .s00 = {
+ .pulse = { 1 /* 600 us */ },
+ .space = { 1 /* 600 us */ },
+ },
+ /* 1 symbol */
+ .s01 = {
+ .pulse = { 2 /* 1.2 ms */ },
+ .space = { 1 /* 600 us */ },
+ },
+ /* free time */
+ .ft = {
+ .minlen = 12,
+ .maxlen = 20,
+ .ft_min = 10, /* 6 ms */
+ },
+ },
+ /* scancode logic */
+ .scancode = img_ir_sony_scancode,
+ .filter = img_ir_sony_filter,
+};
--
1.8.3.2
--
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