media: rc: add zx-irdec remote control driver (b429996c) · Commits · e / devices / android_kernel_oneplus_sm8150

drivers/media/rc/Kconfig

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		@@ -469,6 +469,17 @@ 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

		endif #RC_CORE

drivers/media/rc/Makefile

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		@@ -43,3 +43,4 @@ 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

drivers/media/rc/keymaps/Makefile

+2 −1

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		@@ -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

drivers/media/rc/keymaps/rc-zx-irdec.c

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		/*
		* 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");

drivers/media/rc/zx-irdec.c

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		/*
		* 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;
		};

		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;
		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;

		scancode = ir_nec_bytes_to_scancode(address, not_address,
		command, not_command,
		&rc_type);
		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;

		rcd->priv = irdec;
		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 \| RC_BIT_NEC32;
		rcd->driver_name = DRIVER_NAME;
		rcd->device_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");