[2/2] rc: add zx-irdec remote control driver

Message ID 1501309902-7559-3-git-send-email-shawnguo@kernel.org
State New
Headers show
Series
  • Add ZTE zx-irdec remote control driver
Related show

Commit Message

Shawn Guo July 29, 2017, 6:31 a.m.
From: Shawn Guo <shawn.guo@linaro.org>


It adds the remote control driver and corresponding keymap file for
IRDEC block found on ZTE ZX family SoCs.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

---
 drivers/media/rc/Kconfig               |  11 ++
 drivers/media/rc/Makefile              |   1 +
 drivers/media/rc/keymaps/Makefile      |   3 +-
 drivers/media/rc/keymaps/rc-zx-irdec.c |  79 +++++++++++++
 drivers/media/rc/zx-irdec.c            | 198 +++++++++++++++++++++++++++++++++
 include/media/rc-map.h                 |   1 +
 6 files changed, 292 insertions(+), 1 deletion(-)
 create mode 100644 drivers/media/rc/keymaps/rc-zx-irdec.c
 create mode 100644 drivers/media/rc/zx-irdec.c

-- 
1.9.1

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Comments

Sean Young July 29, 2017, 9:51 a.m. | #1
Hi Shawn,

The driver looks great! Just a minor point, see below.

On Sat, Jul 29, 2017 at 02:31:42PM +0800, Shawn Guo wrote:
> From: Shawn Guo <shawn.guo@linaro.org>

> 

> It adds the remote control driver and corresponding keymap file for

> IRDEC block found on ZTE ZX family SoCs.

> 

> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

> ---

>  drivers/media/rc/Kconfig               |  11 ++

>  drivers/media/rc/Makefile              |   1 +

>  drivers/media/rc/keymaps/Makefile      |   3 +-

>  drivers/media/rc/keymaps/rc-zx-irdec.c |  79 +++++++++++++

>  drivers/media/rc/zx-irdec.c            | 198 +++++++++++++++++++++++++++++++++

>  include/media/rc-map.h                 |   1 +

>  6 files changed, 292 insertions(+), 1 deletion(-)

>  create mode 100644 drivers/media/rc/keymaps/rc-zx-irdec.c

>  create mode 100644 drivers/media/rc/zx-irdec.c

> 

> diff --git a/drivers/media/rc/Kconfig b/drivers/media/rc/Kconfig

> index 5e83b76495f7..c572d5da4b5f 100644

> --- a/drivers/media/rc/Kconfig

> +++ b/drivers/media/rc/Kconfig

> @@ -435,4 +435,15 @@ config IR_SIR

>  	   To compile this driver as a module, choose M here: the module will

>  	   be called sir-ir.

>  

> +config IR_ZX

> +	tristate "ZTE ZX IR remote control"

> +	depends on RC_CORE

> +	depends on ARCH_ZX || COMPILE_TEST

> +	---help---

> +	   Say Y if you want to use the IR remote control available

> +	   on ZTE ZX family SoCs.

> +

> +	   To compile this driver as a module, choose M here: the

> +	   module will be called zx-irdec.

> +

>  endif #RC_DEVICES

> diff --git a/drivers/media/rc/Makefile b/drivers/media/rc/Makefile

> index 245e2c2d0b22..922c1a5620e9 100644

> --- a/drivers/media/rc/Makefile

> +++ b/drivers/media/rc/Makefile

> @@ -41,3 +41,4 @@ obj-$(CONFIG_IR_IMG) += img-ir/

>  obj-$(CONFIG_IR_SERIAL) += serial_ir.o

>  obj-$(CONFIG_IR_SIR) += sir_ir.o

>  obj-$(CONFIG_IR_MTK) += mtk-cir.o

> +obj-$(CONFIG_IR_ZX) += zx-irdec.o

> diff --git a/drivers/media/rc/keymaps/Makefile b/drivers/media/rc/keymaps/Makefile

> index 2945f99907b5..af6496d709fb 100644

> --- a/drivers/media/rc/keymaps/Makefile

> +++ b/drivers/media/rc/keymaps/Makefile

> @@ -109,4 +109,5 @@ obj-$(CONFIG_RC_MAP) += rc-adstech-dvb-t-pci.o \

>  			rc-videomate-tv-pvr.o \

>  			rc-winfast.o \

>  			rc-winfast-usbii-deluxe.o \

> -			rc-su3000.o

> +			rc-su3000.o \

> +			rc-zx-irdec.o

> diff --git a/drivers/media/rc/keymaps/rc-zx-irdec.c b/drivers/media/rc/keymaps/rc-zx-irdec.c

> new file mode 100644

> index 000000000000..cc889df47eb8

> --- /dev/null

> +++ b/drivers/media/rc/keymaps/rc-zx-irdec.c

> @@ -0,0 +1,79 @@

> +/*

> + * Copyright (C) 2017 Sanechips Technology Co., Ltd.

> + * Copyright 2017 Linaro Ltd.

> + *

> + * This program is free software; you can redistribute it and/or modify

> + * it under the terms of the GNU General Public License version 2 as

> + * published by the Free Software Foundation.

> + */

> +

> +#include <linux/module.h>

> +#include <media/rc-map.h>

> +

> +static struct rc_map_table zx_irdec_table[] = {

> +	{ 0x01, KEY_1 },

> +	{ 0x02, KEY_2 },

> +	{ 0x03, KEY_3 },

> +	{ 0x04, KEY_4 },

> +	{ 0x05, KEY_5 },

> +	{ 0x06, KEY_6 },

> +	{ 0x07, KEY_7 },

> +	{ 0x08, KEY_8 },

> +	{ 0x09, KEY_9 },

> +	{ 0x31, KEY_0 },

> +	{ 0x16, KEY_DELETE },

> +	{ 0x0a, KEY_MODE },		/* Input method */

> +	{ 0x0c, KEY_VOLUMEUP },

> +	{ 0x18, KEY_VOLUMEDOWN },

> +	{ 0x0b, KEY_CHANNELUP },

> +	{ 0x15, KEY_CHANNELDOWN },

> +	{ 0x0d, KEY_PAGEUP },

> +	{ 0x13, KEY_PAGEDOWN },

> +	{ 0x46, KEY_FASTFORWARD },

> +	{ 0x43, KEY_REWIND },

> +	{ 0x44, KEY_PLAYPAUSE },

> +	{ 0x45, KEY_STOP },

> +	{ 0x49, KEY_OK },

> +	{ 0x47, KEY_UP },

> +	{ 0x4b, KEY_DOWN },

> +	{ 0x48, KEY_LEFT },

> +	{ 0x4a, KEY_RIGHT },

> +	{ 0x4d, KEY_MENU },

> +	{ 0x56, KEY_APPSELECT },	/* Application */

> +	{ 0x4c, KEY_BACK },

> +	{ 0x1e, KEY_INFO },

> +	{ 0x4e, KEY_F1 },

> +	{ 0x4f, KEY_F2 },

> +	{ 0x50, KEY_F3 },

> +	{ 0x51, KEY_F4 },

> +	{ 0x1c, KEY_AUDIO },

> +	{ 0x12, KEY_MUTE },

> +	{ 0x11, KEY_DOT },		/* Location */

> +	{ 0x1d, KEY_SETUP },

> +	{ 0x40, KEY_POWER },

> +};

> +

> +static struct rc_map_list zx_irdec_map = {

> +	.map = {

> +		.scan = zx_irdec_table,

> +		.size = ARRAY_SIZE(zx_irdec_table),

> +		.rc_type = RC_TYPE_NEC,

> +		.name = RC_MAP_ZX_IRDEC,

> +	}

> +};

> +

> +static int __init init_rc_map_zx_irdec(void)

> +{

> +	return rc_map_register(&zx_irdec_map);

> +}

> +

> +static void __exit exit_rc_map_zx_irdec(void)

> +{

> +	rc_map_unregister(&zx_irdec_map);

> +}

> +

> +module_init(init_rc_map_zx_irdec)

> +module_exit(exit_rc_map_zx_irdec)

> +

> +MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");

> +MODULE_LICENSE("GPL v2");

> diff --git a/drivers/media/rc/zx-irdec.c b/drivers/media/rc/zx-irdec.c

> new file mode 100644

> index 000000000000..bc68c54a910e

> --- /dev/null

> +++ b/drivers/media/rc/zx-irdec.c

> @@ -0,0 +1,198 @@

> +/*

> + * Copyright (C) 2017 Sanechips Technology Co., Ltd.

> + * Copyright 2017 Linaro Ltd.

> + *

> + * This program is free software; you can redistribute it and/or modify

> + * it under the terms of the GNU General Public License version 2 as

> + * published by the Free Software Foundation.

> + */

> +

> +#include <linux/device.h>

> +#include <linux/err.h>

> +#include <linux/interrupt.h>

> +#include <linux/io.h>

> +#include <linux/module.h>

> +#include <linux/of_platform.h>

> +#include <linux/platform_device.h>

> +

> +#include <media/rc-core.h>

> +

> +#define DRIVER_NAME		"zx-irdec"

> +

> +#define ZX_IR_ENABLE		0x04

> +#define ZX_IREN			BIT(0)

> +#define ZX_IR_CTRL		0x08

> +#define ZX_DEGL_MASK		GENMASK(21, 20)

> +#define ZX_DEGL_VALUE(x)	(((x) << 20) & ZX_DEGL_MASK)

> +#define ZX_WDBEGIN_MASK		GENMASK(18, 8)

> +#define ZX_WDBEGIN_VALUE(x)	(((x) << 8) & ZX_WDBEGIN_MASK)

> +#define ZX_IR_INTEN		0x10

> +#define ZX_IR_INTSTCLR		0x14

> +#define ZX_IR_CODE		0x30

> +#define ZX_IR_CNUM		0x34

> +#define ZX_NECRPT		BIT(16)

> +

> +struct zx_irdec {

> +	void __iomem *base;

> +	struct rc_dev *rcd;

> +	struct device *dev;

> +};

> +

> +static void zx_irdec_set_mask(struct zx_irdec *irdec, unsigned int reg,

> +			      u32 mask, u32 value)

> +{

> +	u32 data;

> +

> +	data = readl(irdec->base + reg);

> +	data &= ~mask;

> +	data |= value & mask;

> +	writel(data, irdec->base + reg);

> +}

> +

> +static irqreturn_t zx_irdec_irq(int irq, void *dev_id)

> +{

> +	struct zx_irdec *irdec = dev_id;

> +	struct device *dev = irdec->dev;

> +	u8 address, not_address;

> +	u8 command, not_command;

> +	u32 rawcode, scancode;

> +	enum rc_type rc_type;

> +

> +	/* Clear interrupt */

> +	writel(1, irdec->base + ZX_IR_INTSTCLR);

> +

> +	/* Check repeat frame */

> +	if (readl(irdec->base + ZX_IR_CNUM) & ZX_NECRPT) {

> +		rc_repeat(irdec->rcd);

> +		goto done;

> +	}

> +

> +	rawcode = readl(irdec->base + ZX_IR_CODE);

> +	not_command = (rawcode >> 24) & 0xff;

> +	command = (rawcode >> 16) & 0xff;

> +	not_address = (rawcode >> 8) & 0xff;

> +	address = rawcode & 0xff;

> +

> +	if ((command ^ not_command) != 0xff) {

> +		dev_err(dev, "checksum error: received 0x%08x\n", rawcode);

> +		goto done;


This case is RC_TYPE_NEC32, that could be supported too. That would make
the dev member of zx_irdec structure unnecessary.

> +	}

> +

> +	if ((address ^ not_address) != 0xff) {

> +		/* Extended NEC */

> +		scancode = RC_SCANCODE_NECX(address, command);

> +		rc_type = RC_TYPE_NECX;


NECX has a 16 bit address; only 8 bits are passed here.

> +	} else {

> +		/* Normal NEC */

> +		scancode = RC_SCANCODE_NEC(address, command);

> +		rc_type = RC_TYPE_NEC;

> +	}


Actually this whole nec/necx/nec32 handling is done in many drivers, maybe
it would be nice to have this in a shared function.

> +

> +	rc_keydown(irdec->rcd, rc_type, scancode, 0);

> +

> +done:

> +	return IRQ_HANDLED;

> +}

> +

> +static int zx_irdec_probe(struct platform_device *pdev)

> +{

> +	struct device *dev = &pdev->dev;

> +	struct zx_irdec *irdec;

> +	struct resource *res;

> +	struct rc_dev *rcd;

> +	int irq;

> +	int ret;

> +

> +	irdec = devm_kzalloc(dev, sizeof(*irdec), GFP_KERNEL);

> +	if (!irdec)

> +		return -ENOMEM;

> +

> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

> +	irdec->base = devm_ioremap_resource(dev, res);

> +	if (IS_ERR(irdec->base))

> +		return PTR_ERR(irdec->base);

> +

> +	irq = platform_get_irq(pdev, 0);

> +	if (irq < 0)

> +		return irq;

> +

> +	rcd = devm_rc_allocate_device(dev, RC_DRIVER_SCANCODE);

> +	if (!rcd) {

> +		dev_err(dev, "failed to allocate rc device\n");

> +		return -ENOMEM;

> +	}

> +

> +	irdec->rcd = rcd;

> +	irdec->dev = dev;

> +

> +	rcd->priv = irdec;

> +	rcd->input_name = DRIVER_NAME;

> +	rcd->input_phys = DRIVER_NAME "/input0";

> +	rcd->input_id.bustype = BUS_HOST;

> +	rcd->map_name = RC_MAP_ZX_IRDEC;

> +	rcd->allowed_protocols = RC_BIT_NEC | RC_BIT_NECX;

> +	rcd->driver_name = DRIVER_NAME;

> +

> +	platform_set_drvdata(pdev, irdec);

> +

> +	ret = devm_rc_register_device(dev, rcd);

> +	if (ret) {

> +		dev_err(dev, "failed to register rc device\n");

> +		return ret;

> +	}

> +

> +	ret = devm_request_irq(dev, irq, zx_irdec_irq, 0, NULL, irdec);

> +	if (ret) {

> +		dev_err(dev, "failed to request irq\n");

> +		return ret;

> +	}

> +

> +	/*

> +	 * Initialize deglitch level and watchdog counter beginner as

> +	 * recommended by vendor BSP code.

> +	 */

> +	zx_irdec_set_mask(irdec, ZX_IR_CTRL, ZX_DEGL_MASK, ZX_DEGL_VALUE(0));

> +	zx_irdec_set_mask(irdec, ZX_IR_CTRL, ZX_WDBEGIN_MASK,

> +			  ZX_WDBEGIN_VALUE(0x21c));

> +

> +	/* Enable interrupt */

> +	writel(1, irdec->base + ZX_IR_INTEN);

> +

> +	/* Enable the decoder */

> +	zx_irdec_set_mask(irdec, ZX_IR_ENABLE, ZX_IREN, ZX_IREN);

> +

> +	return 0;

> +}

> +

> +static int zx_irdec_remove(struct platform_device *pdev)

> +{

> +	struct zx_irdec *irdec = platform_get_drvdata(pdev);

> +

> +	/* Disable the decoder */

> +	zx_irdec_set_mask(irdec, ZX_IR_ENABLE, ZX_IREN, 0);

> +

> +	/* Disable interrupt */

> +	writel(0, irdec->base + ZX_IR_INTEN);

> +

> +	return 0;

> +}

> +

> +static const struct of_device_id zx_irdec_match[] = {

> +	{ .compatible = "zte,zx296718-irdec" },

> +	{ },

> +};

> +MODULE_DEVICE_TABLE(of, zx_irdec_match);

> +

> +static struct platform_driver zx_irdec_driver = {

> +	.probe = zx_irdec_probe,

> +	.remove = zx_irdec_remove,

> +	.driver = {

> +		.name = DRIVER_NAME,

> +		.of_match_table	= zx_irdec_match,

> +	},

> +};

> +module_platform_driver(zx_irdec_driver);

> +

> +MODULE_DESCRIPTION("ZTE ZX IR remote control driver");

> +MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");

> +MODULE_LICENSE("GPL v2");

> diff --git a/include/media/rc-map.h b/include/media/rc-map.h

> index 1a815a572fa1..c69482852f29 100644

> --- a/include/media/rc-map.h

> +++ b/include/media/rc-map.h

> @@ -313,6 +313,7 @@ struct rc_map_list {

>  #define RC_MAP_WINFAST                   "rc-winfast"

>  #define RC_MAP_WINFAST_USBII_DELUXE      "rc-winfast-usbii-deluxe"

>  #define RC_MAP_SU3000                    "rc-su3000"

> +#define RC_MAP_ZX_IRDEC                  "rc-zx-irdec"

>  

>  /*

>   * Please, do not just append newer Remote Controller names at the end.

> -- 

> 1.9.1

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Shawn Guo July 30, 2017, 1:16 p.m. | #2
Hi Sean,

On Sat, Jul 29, 2017 at 10:51:13AM +0100, Sean Young wrote:
> Hi Shawn,

> 

> The driver looks great! Just a minor point, see below.


Thanks for taking time to look at the patch.  I appreciate your review
comments, and will post v2 that addressed them shortly.  Thanks.

Shawn
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Patch

diff --git a/drivers/media/rc/Kconfig b/drivers/media/rc/Kconfig
index 5e83b76495f7..c572d5da4b5f 100644
--- a/drivers/media/rc/Kconfig
+++ b/drivers/media/rc/Kconfig
@@ -435,4 +435,15 @@  config IR_SIR
 	   To compile this driver as a module, choose M here: the module will
 	   be called sir-ir.
 
+config IR_ZX
+	tristate "ZTE ZX IR remote control"
+	depends on RC_CORE
+	depends on ARCH_ZX || COMPILE_TEST
+	---help---
+	   Say Y if you want to use the IR remote control available
+	   on ZTE ZX family SoCs.
+
+	   To compile this driver as a module, choose M here: the
+	   module will be called zx-irdec.
+
 endif #RC_DEVICES
diff --git a/drivers/media/rc/Makefile b/drivers/media/rc/Makefile
index 245e2c2d0b22..922c1a5620e9 100644
--- a/drivers/media/rc/Makefile
+++ b/drivers/media/rc/Makefile
@@ -41,3 +41,4 @@  obj-$(CONFIG_IR_IMG) += img-ir/
 obj-$(CONFIG_IR_SERIAL) += serial_ir.o
 obj-$(CONFIG_IR_SIR) += sir_ir.o
 obj-$(CONFIG_IR_MTK) += mtk-cir.o
+obj-$(CONFIG_IR_ZX) += zx-irdec.o
diff --git a/drivers/media/rc/keymaps/Makefile b/drivers/media/rc/keymaps/Makefile
index 2945f99907b5..af6496d709fb 100644
--- a/drivers/media/rc/keymaps/Makefile
+++ b/drivers/media/rc/keymaps/Makefile
@@ -109,4 +109,5 @@  obj-$(CONFIG_RC_MAP) += rc-adstech-dvb-t-pci.o \
 			rc-videomate-tv-pvr.o \
 			rc-winfast.o \
 			rc-winfast-usbii-deluxe.o \
-			rc-su3000.o
+			rc-su3000.o \
+			rc-zx-irdec.o
diff --git a/drivers/media/rc/keymaps/rc-zx-irdec.c b/drivers/media/rc/keymaps/rc-zx-irdec.c
new file mode 100644
index 000000000000..cc889df47eb8
--- /dev/null
+++ b/drivers/media/rc/keymaps/rc-zx-irdec.c
@@ -0,0 +1,79 @@ 
+/*
+ * Copyright (C) 2017 Sanechips Technology Co., Ltd.
+ * Copyright 2017 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <media/rc-map.h>
+
+static struct rc_map_table zx_irdec_table[] = {
+	{ 0x01, KEY_1 },
+	{ 0x02, KEY_2 },
+	{ 0x03, KEY_3 },
+	{ 0x04, KEY_4 },
+	{ 0x05, KEY_5 },
+	{ 0x06, KEY_6 },
+	{ 0x07, KEY_7 },
+	{ 0x08, KEY_8 },
+	{ 0x09, KEY_9 },
+	{ 0x31, KEY_0 },
+	{ 0x16, KEY_DELETE },
+	{ 0x0a, KEY_MODE },		/* Input method */
+	{ 0x0c, KEY_VOLUMEUP },
+	{ 0x18, KEY_VOLUMEDOWN },
+	{ 0x0b, KEY_CHANNELUP },
+	{ 0x15, KEY_CHANNELDOWN },
+	{ 0x0d, KEY_PAGEUP },
+	{ 0x13, KEY_PAGEDOWN },
+	{ 0x46, KEY_FASTFORWARD },
+	{ 0x43, KEY_REWIND },
+	{ 0x44, KEY_PLAYPAUSE },
+	{ 0x45, KEY_STOP },
+	{ 0x49, KEY_OK },
+	{ 0x47, KEY_UP },
+	{ 0x4b, KEY_DOWN },
+	{ 0x48, KEY_LEFT },
+	{ 0x4a, KEY_RIGHT },
+	{ 0x4d, KEY_MENU },
+	{ 0x56, KEY_APPSELECT },	/* Application */
+	{ 0x4c, KEY_BACK },
+	{ 0x1e, KEY_INFO },
+	{ 0x4e, KEY_F1 },
+	{ 0x4f, KEY_F2 },
+	{ 0x50, KEY_F3 },
+	{ 0x51, KEY_F4 },
+	{ 0x1c, KEY_AUDIO },
+	{ 0x12, KEY_MUTE },
+	{ 0x11, KEY_DOT },		/* Location */
+	{ 0x1d, KEY_SETUP },
+	{ 0x40, KEY_POWER },
+};
+
+static struct rc_map_list zx_irdec_map = {
+	.map = {
+		.scan = zx_irdec_table,
+		.size = ARRAY_SIZE(zx_irdec_table),
+		.rc_type = RC_TYPE_NEC,
+		.name = RC_MAP_ZX_IRDEC,
+	}
+};
+
+static int __init init_rc_map_zx_irdec(void)
+{
+	return rc_map_register(&zx_irdec_map);
+}
+
+static void __exit exit_rc_map_zx_irdec(void)
+{
+	rc_map_unregister(&zx_irdec_map);
+}
+
+module_init(init_rc_map_zx_irdec)
+module_exit(exit_rc_map_zx_irdec)
+
+MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/media/rc/zx-irdec.c b/drivers/media/rc/zx-irdec.c
new file mode 100644
index 000000000000..bc68c54a910e
--- /dev/null
+++ b/drivers/media/rc/zx-irdec.c
@@ -0,0 +1,198 @@ 
+/*
+ * Copyright (C) 2017 Sanechips Technology Co., Ltd.
+ * Copyright 2017 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+#include <media/rc-core.h>
+
+#define DRIVER_NAME		"zx-irdec"
+
+#define ZX_IR_ENABLE		0x04
+#define ZX_IREN			BIT(0)
+#define ZX_IR_CTRL		0x08
+#define ZX_DEGL_MASK		GENMASK(21, 20)
+#define ZX_DEGL_VALUE(x)	(((x) << 20) & ZX_DEGL_MASK)
+#define ZX_WDBEGIN_MASK		GENMASK(18, 8)
+#define ZX_WDBEGIN_VALUE(x)	(((x) << 8) & ZX_WDBEGIN_MASK)
+#define ZX_IR_INTEN		0x10
+#define ZX_IR_INTSTCLR		0x14
+#define ZX_IR_CODE		0x30
+#define ZX_IR_CNUM		0x34
+#define ZX_NECRPT		BIT(16)
+
+struct zx_irdec {
+	void __iomem *base;
+	struct rc_dev *rcd;
+	struct device *dev;
+};
+
+static void zx_irdec_set_mask(struct zx_irdec *irdec, unsigned int reg,
+			      u32 mask, u32 value)
+{
+	u32 data;
+
+	data = readl(irdec->base + reg);
+	data &= ~mask;
+	data |= value & mask;
+	writel(data, irdec->base + reg);
+}
+
+static irqreturn_t zx_irdec_irq(int irq, void *dev_id)
+{
+	struct zx_irdec *irdec = dev_id;
+	struct device *dev = irdec->dev;
+	u8 address, not_address;
+	u8 command, not_command;
+	u32 rawcode, scancode;
+	enum rc_type rc_type;
+
+	/* Clear interrupt */
+	writel(1, irdec->base + ZX_IR_INTSTCLR);
+
+	/* Check repeat frame */
+	if (readl(irdec->base + ZX_IR_CNUM) & ZX_NECRPT) {
+		rc_repeat(irdec->rcd);
+		goto done;
+	}
+
+	rawcode = readl(irdec->base + ZX_IR_CODE);
+	not_command = (rawcode >> 24) & 0xff;
+	command = (rawcode >> 16) & 0xff;
+	not_address = (rawcode >> 8) & 0xff;
+	address = rawcode & 0xff;
+
+	if ((command ^ not_command) != 0xff) {
+		dev_err(dev, "checksum error: received 0x%08x\n", rawcode);
+		goto done;
+	}
+
+	if ((address ^ not_address) != 0xff) {
+		/* Extended NEC */
+		scancode = RC_SCANCODE_NECX(address, command);
+		rc_type = RC_TYPE_NECX;
+	} else {
+		/* Normal NEC */
+		scancode = RC_SCANCODE_NEC(address, command);
+		rc_type = RC_TYPE_NEC;
+	}
+
+	rc_keydown(irdec->rcd, rc_type, scancode, 0);
+
+done:
+	return IRQ_HANDLED;
+}
+
+static int zx_irdec_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct zx_irdec *irdec;
+	struct resource *res;
+	struct rc_dev *rcd;
+	int irq;
+	int ret;
+
+	irdec = devm_kzalloc(dev, sizeof(*irdec), GFP_KERNEL);
+	if (!irdec)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	irdec->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(irdec->base))
+		return PTR_ERR(irdec->base);
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	rcd = devm_rc_allocate_device(dev, RC_DRIVER_SCANCODE);
+	if (!rcd) {
+		dev_err(dev, "failed to allocate rc device\n");
+		return -ENOMEM;
+	}
+
+	irdec->rcd = rcd;
+	irdec->dev = dev;
+
+	rcd->priv = irdec;
+	rcd->input_name = DRIVER_NAME;
+	rcd->input_phys = DRIVER_NAME "/input0";
+	rcd->input_id.bustype = BUS_HOST;
+	rcd->map_name = RC_MAP_ZX_IRDEC;
+	rcd->allowed_protocols = RC_BIT_NEC | RC_BIT_NECX;
+	rcd->driver_name = DRIVER_NAME;
+
+	platform_set_drvdata(pdev, irdec);
+
+	ret = devm_rc_register_device(dev, rcd);
+	if (ret) {
+		dev_err(dev, "failed to register rc device\n");
+		return ret;
+	}
+
+	ret = devm_request_irq(dev, irq, zx_irdec_irq, 0, NULL, irdec);
+	if (ret) {
+		dev_err(dev, "failed to request irq\n");
+		return ret;
+	}
+
+	/*
+	 * Initialize deglitch level and watchdog counter beginner as
+	 * recommended by vendor BSP code.
+	 */
+	zx_irdec_set_mask(irdec, ZX_IR_CTRL, ZX_DEGL_MASK, ZX_DEGL_VALUE(0));
+	zx_irdec_set_mask(irdec, ZX_IR_CTRL, ZX_WDBEGIN_MASK,
+			  ZX_WDBEGIN_VALUE(0x21c));
+
+	/* Enable interrupt */
+	writel(1, irdec->base + ZX_IR_INTEN);
+
+	/* Enable the decoder */
+	zx_irdec_set_mask(irdec, ZX_IR_ENABLE, ZX_IREN, ZX_IREN);
+
+	return 0;
+}
+
+static int zx_irdec_remove(struct platform_device *pdev)
+{
+	struct zx_irdec *irdec = platform_get_drvdata(pdev);
+
+	/* Disable the decoder */
+	zx_irdec_set_mask(irdec, ZX_IR_ENABLE, ZX_IREN, 0);
+
+	/* Disable interrupt */
+	writel(0, irdec->base + ZX_IR_INTEN);
+
+	return 0;
+}
+
+static const struct of_device_id zx_irdec_match[] = {
+	{ .compatible = "zte,zx296718-irdec" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, zx_irdec_match);
+
+static struct platform_driver zx_irdec_driver = {
+	.probe = zx_irdec_probe,
+	.remove = zx_irdec_remove,
+	.driver = {
+		.name = DRIVER_NAME,
+		.of_match_table	= zx_irdec_match,
+	},
+};
+module_platform_driver(zx_irdec_driver);
+
+MODULE_DESCRIPTION("ZTE ZX IR remote control driver");
+MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
+MODULE_LICENSE("GPL v2");
diff --git a/include/media/rc-map.h b/include/media/rc-map.h
index 1a815a572fa1..c69482852f29 100644
--- a/include/media/rc-map.h
+++ b/include/media/rc-map.h
@@ -313,6 +313,7 @@  struct rc_map_list {
 #define RC_MAP_WINFAST                   "rc-winfast"
 #define RC_MAP_WINFAST_USBII_DELUXE      "rc-winfast-usbii-deluxe"
 #define RC_MAP_SU3000                    "rc-su3000"
+#define RC_MAP_ZX_IRDEC                  "rc-zx-irdec"
 
 /*
  * Please, do not just append newer Remote Controller names at the end.