[PATCH v5 1/1] media: rc: rcmm decoder
media: add support for RCMM infrared remote controls.
Signed-off-by: Patrick Lerda
---
MAINTAINERS| 5 +
drivers/media/rc/Kconfig | 7 ++
drivers/media/rc/Makefile | 1 +
drivers/media/rc/ir-rcmm-decoder.c | 164 +
drivers/media/rc/rc-core-priv.h| 5 +
drivers/media/rc/rc-main.c | 3 +
include/media/rc-map.h | 6 +-
include/uapi/linux/lirc.h | 2 +
tools/include/uapi/linux/lirc.h| 2 +
9 files changed, 193 insertions(+), 2 deletions(-)
create mode 100644 drivers/media/rc/ir-rcmm-decoder.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 3e9f1710ed13..80426d1faaba 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -16277,6 +16277,11 @@ M: David Härdeman
S: Maintained
F: drivers/media/rc/winbond-cir.c
+RCMM REMOTE CONTROLS DECODER
+M: Patrick Lerda
+S: Maintained
+F: drivers/media/rc/ir-rcmm-decoder.c
+
WINSYSTEMS EBC-C384 WATCHDOG DRIVER
M: William Breathitt Gray
L: linux-watch...@vger.kernel.org
diff --git a/drivers/media/rc/Kconfig b/drivers/media/rc/Kconfig
index 8a216068a35a..43775ac74268 100644
--- a/drivers/media/rc/Kconfig
+++ b/drivers/media/rc/Kconfig
@@ -133,6 +133,13 @@ config IR_IMON_DECODER
remote control and you would like to use it with a raw IR
receiver, or if you wish to use an encoder to transmit this IR.
+config IR_RCMM_DECODER
+ tristate "Enable IR raw decoder for the RC-MM protocol"
+ depends on RC_CORE
+ help
+ Enable this option if you have IR with RC-MM protocol, and
+ if the IR is decoded in software
+
endif #RC_DECODERS
menuconfig RC_DEVICES
diff --git a/drivers/media/rc/Makefile b/drivers/media/rc/Makefile
index 92c163816849..48d23433b3c0 100644
--- a/drivers/media/rc/Makefile
+++ b/drivers/media/rc/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_IR_SHARP_DECODER) += ir-sharp-decoder.o
obj-$(CONFIG_IR_MCE_KBD_DECODER) += ir-mce_kbd-decoder.o
obj-$(CONFIG_IR_XMP_DECODER) += ir-xmp-decoder.o
obj-$(CONFIG_IR_IMON_DECODER) += ir-imon-decoder.o
+obj-$(CONFIG_IR_RCMM_DECODER) += ir-rcmm-decoder.o
# stand-alone IR receivers/transmitters
obj-$(CONFIG_RC_ATI_REMOTE) += ati_remote.o
diff --git a/drivers/media/rc/ir-rcmm-decoder.c
b/drivers/media/rc/ir-rcmm-decoder.c
new file mode 100644
index ..a3c09885da5f
--- /dev/null
+++ b/drivers/media/rc/ir-rcmm-decoder.c
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0+
+// ir-rcmm-decoder.c - A decoder for the RCMM IR protocol
+//
+// Copyright (C) 2018 by Patrick Lerda
+
+#include "rc-core-priv.h"
+#include
+#include
+
+#define RCMM_UNIT 17 /* nanosecs */
+#define RCMM_PREFIX_PULSE 41 /* 16.6*2.5 */
+#define RCMM_PULSE_027 /* 16.6*(1+2/3) */
+#define RCMM_PULSE_144 /* 16.6*(2+2/3) */
+#define RCMM_PULSE_261 /* 16.6*(3+2/3) */
+#define RCMM_PULSE_378 /* 16.6*(4+2/3) */
+
+enum rcmm_state {
+ STATE_INACTIVE,
+ STATE_LOW,
+ STATE_BUMP,
+ STATE_VALUE,
+ STATE_FINISHED,
+};
+
+static bool rcmm_mode(struct rcmm_dec *data)
+{
+ return !((0x000c & data->bits) == 0x000c);
+}
+
+/**
+ * ir_rcmm_decode() - Decode one RCMM pulse or space
+ * @dev: the struct rc_dev descriptor of the device
+ * @ev:the struct ir_raw_event descriptor of the pulse/space
+ *
+ * This function returns -EINVAL if the pulse violates the state machine
+ */
+static int ir_rcmm_decode(struct rc_dev *dev, struct ir_raw_event ev)
+{
+ struct rcmm_dec *data = >raw->rcmm;
+ u32 scancode;
+ u8 toggle;
+ int value;
+
+ if (!(dev->enabled_protocols & RC_PROTO_BIT_RCMM))
+ return 0;
+
+ if (!is_timing_event(ev)) {
+ if (ev.reset)
+ data->state = STATE_INACTIVE;
+ return 0;
+ }
+
+ if (ev.duration > RCMM_PULSE_3 + RCMM_UNIT)
+ goto out;
+
+ switch (data->state) {
+ case STATE_INACTIVE:
+ if (!ev.pulse)
+ break;
+
+ if (!eq_margin(ev.duration, RCMM_PREFIX_PULSE, RCMM_UNIT / 2))
+ break;
+
+ data->state = STATE_LOW;
+ data->count = 0;
+ data->bits = 0;
+ return 0;
+
+ case STATE_LOW:
+ if (ev.pulse)
+ break;
+
+ if (!eq_margin(ev.duration, RCMM_PULSE_0, RCMM_UNIT / 2))
+ break;
+
+ data->state = STATE_BUMP;
+ return 0;
+
+ case STATE_BUMP:
+ if (!ev.pulse)
+ break;
+
+ if (!eq_margin(ev.duration, RCMM_UNIT, RCMM_UNIT / 2))
+
[PATCHv3 1/1] Add ir-rcmm-driver
Add support for RCMM infrared remote controls.
Signed-off-by: Patrick Lerda
---
drivers/media/rc/Kconfig | 10 ++
drivers/media/rc/Makefile | 1 +
drivers/media/rc/ir-rcmm-decoder.c | 185 +
drivers/media/rc/rc-core-priv.h| 5 +
drivers/media/rc/rc-main.c | 3 +
include/media/rc-map.h | 6 +-
include/uapi/linux/lirc.h | 1 +
tools/include/uapi/linux/lirc.h| 1 +
8 files changed, 210 insertions(+), 2 deletions(-)
create mode 100644 drivers/media/rc/ir-rcmm-decoder.c
diff --git a/drivers/media/rc/Kconfig b/drivers/media/rc/Kconfig
index 1021c08a9ba4..b7e08324b874 100644
--- a/drivers/media/rc/Kconfig
+++ b/drivers/media/rc/Kconfig
@@ -133,6 +133,16 @@ config IR_IMON_DECODER
remote control and you would like to use it with a raw IR
receiver, or if you wish to use an encoder to transmit this IR.
+config IR_RCMM_DECODER
+ tristate "Enable IR raw decoder for the RC-MM protocol"
+ depends on RC_CORE
+ select BITREVERSE
+ default y
+
+ ---help---
+ Enable this option if you have IR with RC-MM protocol, and
+ if the IR is decoded in software
+
endif #RC_DECODERS
menuconfig RC_DEVICES
diff --git a/drivers/media/rc/Makefile b/drivers/media/rc/Makefile
index e0340d043fe8..fc4058013234 100644
--- a/drivers/media/rc/Makefile
+++ b/drivers/media/rc/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_IR_SHARP_DECODER) += ir-sharp-decoder.o
obj-$(CONFIG_IR_MCE_KBD_DECODER) += ir-mce_kbd-decoder.o
obj-$(CONFIG_IR_XMP_DECODER) += ir-xmp-decoder.o
obj-$(CONFIG_IR_IMON_DECODER) += ir-imon-decoder.o
+obj-$(CONFIG_IR_RCMM_DECODER) += ir-rcmm-decoder.o
# stand-alone IR receivers/transmitters
obj-$(CONFIG_RC_ATI_REMOTE) += ati_remote.o
diff --git a/drivers/media/rc/ir-rcmm-decoder.c
b/drivers/media/rc/ir-rcmm-decoder.c
new file mode 100644
index ..94d5b70f7a0f
--- /dev/null
+++ b/drivers/media/rc/ir-rcmm-decoder.c
@@ -0,0 +1,185 @@
+/* ir-rcmm-decoder.c - A decoder for the RCMM IR protocol
+ *
+ * Copyright (C) 2016 by Patrick Lerda
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include "rc-core-priv.h"
+#include
+#include
+
+
+#define RCMM_UNIT 17 /* nanosecs */
+#define RCMM_0_NBITS 64
+#define RCMM_PREFIX_PULSE 41 /* 16.6*2.5 */
+#define RCMM_PULSE_027 /* 16.6*(1+2/3) */
+#define RCMM_PULSE_144 /* 16.6*(2+2/3) */
+#define RCMM_PULSE_261 /* 16.6*(3+2/3) */
+#define RCMM_PULSE_378 /* 16.6*(4+2/3) */
+#define RCMM_MODE_MASK 0x
+
+enum rcmm_state {
+ STATE_INACTIVE,
+ STATE_LOW,
+ STATE_BUMP,
+ STATE_VALUE,
+ STATE_FINISHED,
+};
+
+static bool rcmm_mode(struct rcmm_dec *data)
+{
+return !((0x000c & data->bits) == 0x000c);
+}
+
+/**
+ * ir_rcmm_decode() - Decode one RCMM pulse or space
+ * @dev: the struct rc_dev descriptor of the device
+ * @ev:the struct ir_raw_event descriptor of the pulse/space
+ *
+ * This function returns -EINVAL if the pulse violates the state machine
+ */
+static int ir_rcmm_decode(struct rc_dev *dev, struct ir_raw_event ev)
+{
+ struct rcmm_dec *data = >raw->rcmm;
+ u32 scancode;
+ u8 toggle;
+
+ if (!(dev->enabled_protocols & RC_PROTO_BIT_RCMM))
+ return 0;
+
+ if (!is_timing_event(ev)) {
+ if (ev.reset)
+ data->state = STATE_INACTIVE;
+ return 0;
+ }
+
+ if (ev.duration > RCMM_PULSE_3 + RCMM_UNIT)
+ goto out;
+
+ switch (data->state) {
+
+ case STATE_INACTIVE:
+ if (!ev.pulse)
+ break;
+
+ /* Note: larger margin on first pulse since each RCMM_UNIT
+ is quite short and some hardware takes some time to
+ adjust to the signal */
+ if (!eq_margin(ev.duration, RCMM_PREFIX_PULSE, RCMM_UNIT/2))
+ break;
+
+ data->state = STATE_LOW;
+ data->count = 0;
+ data->bits = 0;
+ return 0;
+
+ case STATE_LOW:
+ if (ev.pulse)
+ break;
+
+ /* Note: larger margin on first pulse since each RCMM_UNIT
+ is quite short and some hardware
