Input: add support for keyboards on ST SPEAr platform (bc95df78) · Commits · e / devices / android_kernel_oneplus_sm8150

arch/arm/plat-spear/include/plat/keyboard.h

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		/*
		* Copyright (C) 2010 ST Microelectronics
		* Rajeev Kumar<rajeev-dlh.kumar@st.com>
		*
		* This file is licensed under the terms of the GNU General Public
		* License version 2. This program is licensed "as is" without any
		* warranty of any kind, whether express or implied.
		*/

		#ifndef __PLAT_KEYBOARD_H
		#define __PLAT_KEYBOARD_H

		#include <linux/bitops.h>
		#include <linux/input.h>
		#include <linux/input/matrix_keypad.h>
		#include <linux/types.h>

		#define DECLARE_KEYMAP(_name) \
		int _name[] = { \
		KEY(0, 0, KEY_ESC), \
		KEY(0, 1, KEY_1), \
		KEY(0, 2, KEY_2), \
		KEY(0, 3, KEY_3), \
		KEY(0, 4, KEY_4), \
		KEY(0, 5, KEY_5), \
		KEY(0, 6, KEY_6), \
		KEY(0, 7, KEY_7), \
		KEY(0, 8, KEY_8), \
		KEY(1, 0, KEY_9), \
		KEY(1, 1, KEY_MINUS), \
		KEY(1, 2, KEY_EQUAL), \
		KEY(1, 3, KEY_BACKSPACE), \
		KEY(1, 4, KEY_TAB), \
		KEY(1, 5, KEY_Q), \
		KEY(1, 6, KEY_W), \
		KEY(1, 7, KEY_E), \
		KEY(1, 8, KEY_R), \
		KEY(2, 0, KEY_T), \
		KEY(2, 1, KEY_Y), \
		KEY(2, 2, KEY_U), \
		KEY(2, 3, KEY_I), \
		KEY(2, 4, KEY_O), \
		KEY(2, 5, KEY_P), \
		KEY(2, 6, KEY_LEFTBRACE), \
		KEY(2, 7, KEY_RIGHTBRACE), \
		KEY(2, 8, KEY_ENTER), \
		KEY(3, 0, KEY_LEFTCTRL), \
		KEY(3, 1, KEY_A), \
		KEY(3, 2, KEY_S), \
		KEY(3, 3, KEY_D), \
		KEY(3, 4, KEY_F), \
		KEY(3, 5, KEY_G), \
		KEY(3, 6, KEY_H), \
		KEY(3, 7, KEY_J), \
		KEY(3, 8, KEY_K), \
		KEY(4, 0, KEY_L), \
		KEY(4, 1, KEY_SEMICOLON), \
		KEY(4, 2, KEY_APOSTROPHE), \
		KEY(4, 3, KEY_GRAVE), \
		KEY(4, 4, KEY_LEFTSHIFT), \
		KEY(4, 5, KEY_BACKSLASH), \
		KEY(4, 6, KEY_Z), \
		KEY(4, 7, KEY_X), \
		KEY(4, 8, KEY_C), \
		KEY(4, 0, KEY_L), \
		KEY(4, 1, KEY_SEMICOLON), \
		KEY(4, 2, KEY_APOSTROPHE), \
		KEY(4, 3, KEY_GRAVE), \
		KEY(4, 4, KEY_LEFTSHIFT), \
		KEY(4, 5, KEY_BACKSLASH), \
		KEY(4, 6, KEY_Z), \
		KEY(4, 7, KEY_X), \
		KEY(4, 8, KEY_C), \
		KEY(4, 0, KEY_L), \
		KEY(4, 1, KEY_SEMICOLON), \
		KEY(4, 2, KEY_APOSTROPHE), \
		KEY(4, 3, KEY_GRAVE), \
		KEY(4, 4, KEY_LEFTSHIFT), \
		KEY(4, 5, KEY_BACKSLASH), \
		KEY(4, 6, KEY_Z), \
		KEY(4, 7, KEY_X), \
		KEY(4, 8, KEY_C), \
		KEY(5, 0, KEY_V), \
		KEY(5, 1, KEY_B), \
		KEY(5, 2, KEY_N), \
		KEY(5, 3, KEY_M), \
		KEY(5, 4, KEY_COMMA), \
		KEY(5, 5, KEY_DOT), \
		KEY(5, 6, KEY_SLASH), \
		KEY(5, 7, KEY_RIGHTSHIFT), \
		KEY(5, 8, KEY_KPASTERISK), \
		KEY(6, 0, KEY_LEFTALT), \
		KEY(6, 1, KEY_SPACE), \
		KEY(6, 2, KEY_CAPSLOCK), \
		KEY(6, 3, KEY_F1), \
		KEY(6, 4, KEY_F2), \
		KEY(6, 5, KEY_F3), \
		KEY(6, 6, KEY_F4), \
		KEY(6, 7, KEY_F5), \
		KEY(6, 8, KEY_F6), \
		KEY(7, 0, KEY_F7), \
		KEY(7, 1, KEY_F8), \
		KEY(7, 2, KEY_F9), \
		KEY(7, 3, KEY_F10), \
		KEY(7, 4, KEY_NUMLOCK), \
		KEY(7, 5, KEY_SCROLLLOCK), \
		KEY(7, 6, KEY_KP7), \
		KEY(7, 7, KEY_KP8), \
		KEY(7, 8, KEY_KP9), \
		KEY(8, 0, KEY_KPMINUS), \
		KEY(8, 1, KEY_KP4), \
		KEY(8, 2, KEY_KP5), \
		KEY(8, 3, KEY_KP6), \
		KEY(8, 4, KEY_KPPLUS), \
		KEY(8, 5, KEY_KP1), \
		KEY(8, 6, KEY_KP2), \
		KEY(8, 7, KEY_KP3), \
		KEY(8, 8, KEY_KP0), \
		}

		/**
		* struct kbd_platform_data - spear keyboard platform data
		* keymap: pointer to keymap data (table and size)
		* rep: enables key autorepeat
		*
		* This structure is supposed to be used by platform code to supply
		* keymaps to drivers that implement keyboards.
		*/
		struct kbd_platform_data {
		const struct matrix_keymap_data *keymap;
		bool rep;
		};

		/* This function is used to set platform data field of pdev->dev */
		static inline void
		kbd_set_plat_data(struct platform_device pdev, struct kbd_platform_data data)
		{
		pdev->dev.platform_data = data;
		}

		#endif /* __PLAT_KEYBOARD_H */

drivers/input/keyboard/Kconfig

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		@@ -443,6 +443,15 @@ config KEYBOARD_OMAP4
		To compile this driver as a module, choose M here: the
		module will be called omap4-keypad.

		config KEYBOARD_SPEAR
		tristate "ST SPEAR keyboard support"
		depends on PLAT_SPEAR
		help
		Say Y here if you want to use the SPEAR keyboard.

		To compile this driver as a module, choose M here: the
		module will be called spear-keboard.

		config KEYBOARD_TNETV107X
		tristate "TI TNETV107X keypad support"
		depends on ARCH_DAVINCI_TNETV107X

drivers/input/keyboard/Makefile

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		@@ -37,6 +37,7 @@ obj-$(CONFIG_KEYBOARD_PXA930_ROTARY) += pxa930_rotary.o
		obj-$(CONFIG_KEYBOARD_QT2160) += qt2160.o
		obj-$(CONFIG_KEYBOARD_SAMSUNG) += samsung-keypad.o
		obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o
		obj-$(CONFIG_KEYBOARD_SPEAR) += spear-keyboard.o
		obj-$(CONFIG_KEYBOARD_STMPE) += stmpe-keypad.o
		obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o
		obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o

drivers/input/keyboard/spear-keyboard.c

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		/*
		* SPEAr Keyboard Driver
		* Based on omap-keypad driver
		*
		* Copyright (C) 2010 ST Microelectronics
		* Rajeev Kumar<rajeev-dlh.kumar@st.com>
		*
		* This file is licensed under the terms of the GNU General Public
		* License version 2. This program is licensed "as is" without any
		* warranty of any kind, whether express or implied.
		*/

		#include <linux/clk.h>
		#include <linux/errno.h>
		#include <linux/init.h>
		#include <linux/interrupt.h>
		#include <linux/input.h>
		#include <linux/io.h>
		#include <linux/irq.h>
		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/platform_device.h>
		#include <linux/pm_wakeup.h>
		#include <linux/slab.h>
		#include <linux/types.h>
		#include <plat/keyboard.h>

		/* Keyboard Registers */
		#define MODE_REG 0x00 /* 16 bit reg */
		#define STATUS_REG 0x0C /* 2 bit reg */
		#define DATA_REG 0x10 /* 8 bit reg */
		#define INTR_MASK 0x54

		/* Register Values */
		/*
		* pclk freq mask = (APB FEQ -1)= 82 MHZ.Programme bit 15-9 in mode
		* control register as 1010010(82MHZ)
		*/
		#define PCLK_FREQ_MSK 0xA400 /* 82 MHz */
		#define START_SCAN 0x0100
		#define SCAN_RATE_10 0x0000
		#define SCAN_RATE_20 0x0004
		#define SCAN_RATE_40 0x0008
		#define SCAN_RATE_80 0x000C
		#define MODE_KEYBOARD 0x0002
		#define DATA_AVAIL 0x2

		#define KEY_MASK 0xFF000000
		#define KEY_VALUE 0x00FFFFFF
		#define ROW_MASK 0xF0
		#define COLUMN_MASK 0x0F
		#define ROW_SHIFT 4

		struct spear_kbd {
		struct input_dev *input;
		struct resource *res;
		void __iomem *io_base;
		struct clk *clk;
		unsigned int irq;
		unsigned short last_key;
		unsigned short keycodes[256];
		};

		static irqreturn_t spear_kbd_interrupt(int irq, void *dev_id)
		{
		struct spear_kbd *kbd = dev_id;
		struct input_dev *input = kbd->input;
		unsigned int key;
		u8 sts, val;

		sts = readb(kbd->io_base + STATUS_REG);
		if (sts & DATA_AVAIL)
		return IRQ_NONE;

		if (kbd->last_key != KEY_RESERVED) {
		input_report_key(input, kbd->last_key, 0);
		kbd->last_key = KEY_RESERVED;
		}

		/* following reads active (row, col) pair */
		val = readb(kbd->io_base + DATA_REG);
		key = kbd->keycodes[val];

		input_event(input, EV_MSC, MSC_SCAN, val);
		input_report_key(input, key, 1);
		input_sync(input);

		kbd->last_key = key;

		/* clear interrupt */
		writeb(0, kbd->io_base + STATUS_REG);

		return IRQ_HANDLED;
		}

		static int spear_kbd_open(struct input_dev *dev)
		{
		struct spear_kbd *kbd = input_get_drvdata(dev);
		int error;
		u16 val;

		kbd->last_key = KEY_RESERVED;

		error = clk_enable(kbd->clk);
		if (error)
		return error;

		/* program keyboard */
		val = SCAN_RATE_80 \| MODE_KEYBOARD \| PCLK_FREQ_MSK;
		writew(val, kbd->io_base + MODE_REG);
		writeb(1, kbd->io_base + STATUS_REG);

		/* start key scan */
		val = readw(kbd->io_base + MODE_REG);
		val \|= START_SCAN;
		writew(val, kbd->io_base + MODE_REG);

		return 0;
		}

		static void spear_kbd_close(struct input_dev *dev)
		{
		struct spear_kbd *kbd = input_get_drvdata(dev);
		u16 val;

		/* stop key scan */
		val = readw(kbd->io_base + MODE_REG);
		val &= ~START_SCAN;
		writew(val, kbd->io_base + MODE_REG);

		clk_disable(kbd->clk);

		kbd->last_key = KEY_RESERVED;
		}

		static int __devinit spear_kbd_probe(struct platform_device *pdev)
		{
		const struct kbd_platform_data *pdata = pdev->dev.platform_data;
		const struct matrix_keymap_data *keymap;
		struct spear_kbd *kbd;
		struct input_dev *input_dev;
		struct resource *res;
		int irq;
		int error;

		if (!pdata) {
		dev_err(&pdev->dev, "Invalid platform data\n");
		return -EINVAL;
		}

		keymap = pdata->keymap;
		if (!keymap) {
		dev_err(&pdev->dev, "no keymap defined\n");
		return -EINVAL;
		}

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		if (!res) {
		dev_err(&pdev->dev, "no keyboard resource defined\n");
		return -EBUSY;
		}

		irq = platform_get_irq(pdev, 0);
		if (irq < 0) {
		dev_err(&pdev->dev, "not able to get irq for the device\n");
		return irq;
		}

		kbd = kzalloc(sizeof(*kbd), GFP_KERNEL);
		input_dev = input_allocate_device();
		if (!kbd \|\| !input_dev) {
		dev_err(&pdev->dev, "out of memory\n");
		error = -ENOMEM;
		goto err_free_mem;
		}

		kbd->input = input_dev;
		kbd->irq = irq;
		kbd->res = request_mem_region(res->start, resource_size(res),
		pdev->name);
		if (!kbd->res) {
		dev_err(&pdev->dev, "keyboard region already claimed\n");
		error = -EBUSY;
		goto err_free_mem;
		}

		kbd->io_base = ioremap(res->start, resource_size(res));
		if (!kbd->io_base) {
		dev_err(&pdev->dev, "ioremap failed for kbd_region\n");
		error = -ENOMEM;
		goto err_release_mem_region;
		}

		kbd->clk = clk_get(&pdev->dev, NULL);
		if (IS_ERR(kbd->clk)) {
		error = PTR_ERR(kbd->clk);
		goto err_iounmap;
		}

		input_dev->name = "Spear Keyboard";
		input_dev->phys = "keyboard/input0";
		input_dev->dev.parent = &pdev->dev;
		input_dev->id.bustype = BUS_HOST;
		input_dev->id.vendor = 0x0001;
		input_dev->id.product = 0x0001;
		input_dev->id.version = 0x0100;
		input_dev->open = spear_kbd_open;
		input_dev->close = spear_kbd_close;

		__set_bit(EV_KEY, input_dev->evbit);
		if (pdata->rep)
		__set_bit(EV_REP, input_dev->evbit);
		input_set_capability(input_dev, EV_MSC, MSC_SCAN);

		input_dev->keycode = kbd->keycodes;
		input_dev->keycodesize = sizeof(kbd->keycodes[0]);
		input_dev->keycodemax = ARRAY_SIZE(kbd->keycodes);

		matrix_keypad_build_keymap(keymap, ROW_SHIFT,
		input_dev->keycode, input_dev->keybit);

		input_set_drvdata(input_dev, kbd);

		error = request_irq(irq, spear_kbd_interrupt, 0, "keyboard", kbd);
		if (error) {
		dev_err(&pdev->dev, "request_irq fail\n");
		goto err_put_clk;
		}

		error = input_register_device(input_dev);
		if (error) {
		dev_err(&pdev->dev, "Unable to register keyboard device\n");
		goto err_free_irq;
		}

		device_init_wakeup(&pdev->dev, 1);
		platform_set_drvdata(pdev, kbd);

		return 0;

		err_free_irq:
		free_irq(kbd->irq, kbd);
		err_put_clk:
		clk_put(kbd->clk);
		err_iounmap:
		iounmap(kbd->io_base);
		err_release_mem_region:
		release_mem_region(res->start, resource_size(res));
		err_free_mem:
		input_free_device(input_dev);
		kfree(kbd);

		return error;
		}

		static int __devexit spear_kbd_remove(struct platform_device *pdev)
		{
		struct spear_kbd *kbd = platform_get_drvdata(pdev);

		free_irq(kbd->irq, kbd);
		input_unregister_device(kbd->input);
		clk_put(kbd->clk);
		iounmap(kbd->io_base);
		release_mem_region(kbd->res->start, resource_size(kbd->res));
		kfree(kbd);

		device_init_wakeup(&pdev->dev, 1);
		platform_set_drvdata(pdev, NULL);

		return 0;
		}

		#ifdef CONFIG_PM
		static int spear_kbd_suspend(struct device *dev)
		{
		struct platform_device *pdev = to_platform_device(dev);
		struct spear_kbd *kbd = platform_get_drvdata(pdev);
		struct input_dev *input_dev = kbd->input;

		mutex_lock(&input_dev->mutex);

		if (input_dev->users)
		clk_enable(kbd->clk);

		if (device_may_wakeup(&pdev->dev))
		enable_irq_wake(kbd->irq);

		mutex_unlock(&input_dev->mutex);

		return 0;
		}

		static int spear_kbd_resume(struct device *dev)
		{
		struct platform_device *pdev = to_platform_device(dev);
		struct spear_kbd *kbd = platform_get_drvdata(pdev);
		struct input_dev *input_dev = kbd->input;

		mutex_lock(&input_dev->mutex);

		if (device_may_wakeup(&pdev->dev))
		disable_irq_wake(kbd->irq);

		if (input_dev->users)
		clk_enable(kbd->clk);

		mutex_unlock(&input_dev->mutex);

		return 0;
		}

		static const struct dev_pm_ops spear_kbd_pm_ops = {
		.suspend = spear_kbd_suspend,
		.resume = spear_kbd_resume,
		};
		#endif

		static struct platform_driver spear_kbd_driver = {
		.probe = spear_kbd_probe,
		.remove = __devexit_p(spear_kbd_remove),
		.driver = {
		.name = "keyboard",
		.owner = THIS_MODULE,
		#ifdef CONFIG_PM
		.pm = &spear_kbd_pm_ops,
		#endif
		},
		};

		static int __init spear_kbd_init(void)
		{
		return platform_driver_register(&spear_kbd_driver);
		}
		module_init(spear_kbd_init);

		static void __exit spear_kbd_exit(void)
		{
		platform_driver_unregister(&spear_kbd_driver);
		}
		module_exit(spear_kbd_exit);

		MODULE_AUTHOR("Rajeev Kumar");
		MODULE_DESCRIPTION("SPEAr Keyboard Driver");
		MODULE_LICENSE("GPL");