[PATCH] OMAP: Add keypad driver (ad4e09b1) · Commits · e / devices / android_kernel_oneplus_sm8150

drivers/input/keyboard/Kconfig

+9 −0

Original line number	Original line	Diff line number	Diff line
	@@ -183,4 +183,13 @@ config KEYBOARD_HIL
	This driver implements support for HIL-keyboards attached		This driver implements support for HIL-keyboards attached
	to your machine, so normally you should say Y here.		to your machine, so normally you should say Y here.

			config KEYBOARD_OMAP
			tristate "TI OMAP keypad support"
			depends on (ARCH_OMAP1 \|\| ARCH_OMAP2)
			help
			Say Y here if you want to use the OMAP keypad.

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

	endif		endif

drivers/input/keyboard/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -15,4 +15,5 @@ obj-$(CONFIG_KEYBOARD_CORGI) += corgikbd.o
	obj-$(CONFIG_KEYBOARD_SPITZ) += spitzkbd.o		obj-$(CONFIG_KEYBOARD_SPITZ) += spitzkbd.o
	obj-$(CONFIG_KEYBOARD_HIL) += hil_kbd.o		obj-$(CONFIG_KEYBOARD_HIL) += hil_kbd.o
	obj-$(CONFIG_KEYBOARD_HIL_OLD) += hilkbd.o		obj-$(CONFIG_KEYBOARD_HIL_OLD) += hilkbd.o
			obj-$(CONFIG_KEYBOARD_OMAP) += omap-keypad.o

drivers/input/keyboard/omap-keypad.c

0 → 100644

+492 −0

Original line number	Original line	Diff line number	Diff line
			/*
			* linux/drivers/input/keyboard/omap-keypad.c
			*
			* OMAP Keypad Driver
			*
			* Copyright (C) 2003 Nokia Corporation
			* Written by Timo Ters <ext-timo.teras@nokia.com>
			*
			* Added support for H2 & H3 Keypad
			* Copyright (C) 2004 Texas Instruments
			*
			* 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; either version 2 of the License, or
			* (at your option) any later version.
			*
			* 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.
			*
			* You should have received a copy of the GNU General Public License
			* along with this program; if not, write to the Free Software
			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
			*/

			#include <linux/module.h>
			#include <linux/init.h>
			#include <linux/interrupt.h>
			#include <linux/types.h>
			#include <linux/input.h>
			#include <linux/kernel.h>
			#include <linux/delay.h>
			#include <linux/platform_device.h>
			#include <linux/mutex.h>
			#include <linux/errno.h>
			#include <asm/arch/gpio.h>
			#include <asm/arch/keypad.h>
			#include <asm/arch/menelaus.h>
			#include <asm/irq.h>
			#include <asm/hardware.h>
			#include <asm/io.h>
			#include <asm/mach-types.h>
			#include <asm/arch/mux.h>

			#undef NEW_BOARD_LEARNING_MODE

			static void omap_kp_tasklet(unsigned long);
			static void omap_kp_timer(unsigned long);

			static unsigned char keypad_state[8];
			static DEFINE_MUTEX(kp_enable_mutex);
			static int kp_enable = 1;
			static int kp_cur_group = -1;

			struct omap_kp {
			struct input_dev *input;
			struct timer_list timer;
			int irq;
			unsigned int rows;
			unsigned int cols;
			unsigned long delay;
			unsigned int debounce;
			};

			DECLARE_TASKLET_DISABLED(kp_tasklet, omap_kp_tasklet, 0);

			static int *keymap;
			static unsigned int *row_gpios;
			static unsigned int *col_gpios;

			#ifdef CONFIG_ARCH_OMAP2
			static void set_col_gpio_val(struct omap_kp *omap_kp, u8 value)
			{
			int col;
			for (col = 0; col < omap_kp->cols; col++) {
			if (value & (1 << col))
			omap_set_gpio_dataout(col_gpios[col], 1);
			else
			omap_set_gpio_dataout(col_gpios[col], 0);
			}
			}

			static u8 get_row_gpio_val(struct omap_kp *omap_kp)
			{
			int row;
			u8 value = 0;

			for (row = 0; row < omap_kp->rows; row++) {
			if (omap_get_gpio_datain(row_gpios[row]))
			value \|= (1 << row);
			}
			return value;
			}
			#else
			#define set_col_gpio_val(x, y) do {} while (0)
			#define get_row_gpio_val(x) 0
			#endif

			static irqreturn_t omap_kp_interrupt(int irq, void *dev_id,
			struct pt_regs *regs)
			{
			struct omap_kp *omap_kp = dev_id;

			/* disable keyboard interrupt and schedule for handling */
			if (cpu_is_omap24xx()) {
			int i;
			for (i = 0; i < omap_kp->rows; i++)
			disable_irq(OMAP_GPIO_IRQ(row_gpios[i]));
			} else
			/* disable keyboard interrupt and schedule for handling */
			omap_writew(1, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);

			tasklet_schedule(&kp_tasklet);

			return IRQ_HANDLED;
			}

			static void omap_kp_timer(unsigned long data)
			{
			tasklet_schedule(&kp_tasklet);
			}

			static void omap_kp_scan_keypad(struct omap_kp omap_kp, unsigned char state)
			{
			int col = 0;

			/* read the keypad status */
			if (cpu_is_omap24xx()) {
			int i;
			for (i = 0; i < omap_kp->rows; i++)
			disable_irq(OMAP_GPIO_IRQ(row_gpios[i]));

			/* read the keypad status */
			for (col = 0; col < omap_kp->cols; col++) {
			set_col_gpio_val(omap_kp, ~(1 << col));
			state[col] = ~(get_row_gpio_val(omap_kp)) & 0x3f;
			}
			set_col_gpio_val(omap_kp, 0);

			} else {
			/* disable keyboard interrupt and schedule for handling */
			omap_writew(1, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);

			/* read the keypad status */
			omap_writew(0xff, OMAP_MPUIO_BASE + OMAP_MPUIO_KBC);
			for (col = 0; col < omap_kp->cols; col++) {
			omap_writew(~(1 << col) & 0xff,
			OMAP_MPUIO_BASE + OMAP_MPUIO_KBC);

			udelay(omap_kp->delay);

			state[col] = ~omap_readw(OMAP_MPUIO_BASE +
			OMAP_MPUIO_KBR_LATCH) & 0xff;
			}
			omap_writew(0x00, OMAP_MPUIO_BASE + OMAP_MPUIO_KBC);
			udelay(2);
			}
			}

			static inline int omap_kp_find_key(int col, int row)
			{
			int i, key;

			key = KEY(col, row, 0);
			for (i = 0; keymap[i] != 0; i++)
			if ((keymap[i] & 0xff000000) == key)
			return keymap[i] & 0x00ffffff;
			return -1;
			}

			static void omap_kp_tasklet(unsigned long data)
			{
			struct omap_kp omap_kp_data = (struct omap_kp ) data;
			unsigned char new_state[8], changed, key_down = 0;
			int col, row;
			int spurious = 0;

			/* check for any changes */
			omap_kp_scan_keypad(omap_kp_data, new_state);

			/* check for changes and print those */
			for (col = 0; col < omap_kp_data->cols; col++) {
			changed = new_state[col] ^ keypad_state[col];
			key_down \|= new_state[col];
			if (changed == 0)
			continue;

			for (row = 0; row < omap_kp_data->rows; row++) {
			int key;
			if (!(changed & (1 << row)))
			continue;
			#ifdef NEW_BOARD_LEARNING_MODE
			printk(KERN_INFO "omap-keypad: key %d-%d %s\n", col,
			row, (new_state[col] & (1 << row)) ?
			"pressed" : "released");
			#else
			key = omap_kp_find_key(col, row);
			if (key < 0) {
			printk(KERN_WARNING
			"omap-keypad: Spurious key event %d-%d\n",
			col, row);
			/* We scan again after a couple of seconds */
			spurious = 1;
			continue;
			}

			if (!(kp_cur_group == (key & GROUP_MASK) \|\|
			kp_cur_group == -1))
			continue;

			kp_cur_group = key & GROUP_MASK;
			input_report_key(omap_kp_data->input, key & ~GROUP_MASK,
			new_state[col] & (1 << row));
			#endif
			}
			}
			memcpy(keypad_state, new_state, sizeof(keypad_state));

			if (key_down) {
			int delay = HZ / 20;
			/* some key is pressed - keep irq disabled and use timer
			* to poll the keypad */
			if (spurious)
			delay = 2 * HZ;
			mod_timer(&omap_kp_data->timer, jiffies + delay);
			} else {
			/* enable interrupts */
			if (cpu_is_omap24xx()) {
			int i;
			for (i = 0; i < omap_kp_data->rows; i++)
			enable_irq(OMAP_GPIO_IRQ(row_gpios[i]));
			} else {
			omap_writew(0, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
			kp_cur_group = -1;
			}
			}
			}

			static ssize_t omap_kp_enable_show(struct device *dev,
			struct device_attribute attr, char buf)
			{
			return sprintf(buf, "%u\n", kp_enable);
			}

			static ssize_t omap_kp_enable_store(struct device dev, struct device_attribute attr,
			const char *buf, size_t count)
			{
			int state;

			if (sscanf(buf, "%u", &state) != 1)
			return -EINVAL;

			if ((state != 1) && (state != 0))
			return -EINVAL;

			mutex_lock(&kp_enable_mutex);
			if (state != kp_enable) {
			if (state)
			enable_irq(INT_KEYBOARD);
			else
			disable_irq(INT_KEYBOARD);
			kp_enable = state;
			}
			mutex_unlock(&kp_enable_mutex);

			return strnlen(buf, count);
			}

			static DEVICE_ATTR(enable, S_IRUGO \| S_IWUSR, omap_kp_enable_show, omap_kp_enable_store);

			#ifdef CONFIG_PM
			static int omap_kp_suspend(struct platform_device *dev, pm_message_t state)
			{
			/* Nothing yet */

			return 0;
			}

			static int omap_kp_resume(struct platform_device *dev)
			{
			/* Nothing yet */

			return 0;
			}
			#else
			#define omap_kp_suspend NULL
			#define omap_kp_resume NULL
			#endif

			static int __init omap_kp_probe(struct platform_device *pdev)
			{
			struct omap_kp *omap_kp;
			struct input_dev *input_dev;
			struct omap_kp_platform_data *pdata = pdev->dev.platform_data;
			int i, col_idx, row_idx, irq_idx, ret;

			if (!pdata->rows \|\| !pdata->cols \|\| !pdata->keymap) {
			printk(KERN_ERR "No rows, cols or keymap from pdata\n");
			return -EINVAL;
			}

			omap_kp = kzalloc(sizeof(struct omap_kp), GFP_KERNEL);
			input_dev = input_allocate_device();
			if (!omap_kp \|\| !input_dev) {
			kfree(omap_kp);
			input_free_device(input_dev);
			return -ENOMEM;
			}

			platform_set_drvdata(pdev, omap_kp);

			omap_kp->input = input_dev;

			/* Disable the interrupt for the MPUIO keyboard */
			if (!cpu_is_omap24xx())
			omap_writew(1, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);

			keymap = pdata->keymap;

			if (pdata->rep)
			set_bit(EV_REP, input_dev->evbit);

			if (pdata->delay)
			omap_kp->delay = pdata->delay;

			if (pdata->row_gpios && pdata->col_gpios) {
			row_gpios = pdata->row_gpios;
			col_gpios = pdata->col_gpios;
			}

			omap_kp->rows = pdata->rows;
			omap_kp->cols = pdata->cols;

			if (cpu_is_omap24xx()) {
			/* Cols: outputs */
			for (col_idx = 0; col_idx < omap_kp->cols; col_idx++) {
			if (omap_request_gpio(col_gpios[col_idx]) < 0) {
			printk(KERN_ERR "Failed to request"
			"GPIO%d for keypad\n",
			col_gpios[col_idx]);
			goto err1;
			}
			omap_set_gpio_direction(col_gpios[col_idx], 0);
			}
			/* Rows: inputs */
			for (row_idx = 0; row_idx < omap_kp->rows; row_idx++) {
			if (omap_request_gpio(row_gpios[row_idx]) < 0) {
			printk(KERN_ERR "Failed to request"
			"GPIO%d for keypad\n",
			row_gpios[row_idx]);
			goto err2;
			}
			omap_set_gpio_direction(row_gpios[row_idx], 1);
			}
			}

			setup_timer(&omap_kp->timer, omap_kp_timer, (unsigned long)omap_kp);

			/* get the irq and init timer*/
			tasklet_enable(&kp_tasklet);
			kp_tasklet.data = (unsigned long) omap_kp;

			ret = device_create_file(&pdev->dev, &dev_attr_enable);
			if (ret < 0)
			goto err2;

			/* setup input device */
			set_bit(EV_KEY, input_dev->evbit);
			for (i = 0; keymap[i] != 0; i++)
			set_bit(keymap[i] & KEY_MAX, input_dev->keybit);
			input_dev->name = "omap-keypad";
			input_dev->phys = "omap-keypad/input0";
			input_dev->cdev.dev = &pdev->dev;
			input_dev->private = omap_kp;

			input_dev->id.bustype = BUS_HOST;
			input_dev->id.vendor = 0x0001;
			input_dev->id.product = 0x0001;
			input_dev->id.version = 0x0100;

			input_dev->keycode = keymap;
			input_dev->keycodesize = sizeof(unsigned int);
			input_dev->keycodemax = pdata->keymapsize;

			ret = input_register_device(omap_kp->input);
			if (ret < 0) {
			printk(KERN_ERR "Unable to register omap-keypad input device\n");
			goto err3;
			}

			if (pdata->dbounce)
			omap_writew(0xff, OMAP_MPUIO_BASE + OMAP_MPUIO_GPIO_DEBOUNCING);

			/* scan current status and enable interrupt */
			omap_kp_scan_keypad(omap_kp, keypad_state);
			if (!cpu_is_omap24xx()) {
			omap_kp->irq = platform_get_irq(pdev, 0);
			if (omap_kp->irq >= 0) {
			if (request_irq(omap_kp->irq, omap_kp_interrupt, 0,
			"omap-keypad", omap_kp) < 0)
			goto err4;
			}
			omap_writew(0, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
			} else {
			for (irq_idx = 0; irq_idx < omap_kp->rows; irq_idx++) {
			if (request_irq(OMAP_GPIO_IRQ(row_gpios[irq_idx]),
			omap_kp_interrupt,
			IRQF_TRIGGER_FALLING,
			"omap-keypad", omap_kp) < 0)
			goto err5;
			}
			}
			return 0;
			err5:
			for (i = irq_idx-1; i >=0; i--)
			free_irq(row_gpios[i], 0);
			err4:
			input_unregister_device(omap_kp->input);
			input_dev = NULL;
			err3:
			device_remove_file(&pdev->dev, &dev_attr_enable);
			err2:
			for (i = row_idx-1; i >=0; i--)
			omap_free_gpio(row_gpios[i]);
			err1:
			for (i = col_idx-1; i >=0; i--)
			omap_free_gpio(col_gpios[i]);

			kfree(omap_kp);
			input_free_device(input_dev);

			return -EINVAL;
			}

			static int omap_kp_remove(struct platform_device *pdev)
			{
			struct omap_kp *omap_kp = platform_get_drvdata(pdev);

			/* disable keypad interrupt handling */
			tasklet_disable(&kp_tasklet);
			if (cpu_is_omap24xx()) {
			int i;
			for (i = 0; i < omap_kp->cols; i++)
			omap_free_gpio(col_gpios[i]);
			for (i = 0; i < omap_kp->rows; i++) {
			omap_free_gpio(row_gpios[i]);
			free_irq(OMAP_GPIO_IRQ(row_gpios[i]), 0);
			}
			} else {
			omap_writew(1, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
			free_irq(omap_kp->irq, 0);
			}

			del_timer_sync(&omap_kp->timer);
			tasklet_kill(&kp_tasklet);

			/* unregister everything */
			input_unregister_device(omap_kp->input);

			kfree(omap_kp);

			return 0;
			}

			static struct platform_driver omap_kp_driver = {
			.probe = omap_kp_probe,
			.remove = omap_kp_remove,
			.suspend = omap_kp_suspend,
			.resume = omap_kp_resume,
			.driver = {
			.name = "omap-keypad",
			},
			};

			static int __devinit omap_kp_init(void)
			{
			printk(KERN_INFO "OMAP Keypad Driver\n");
			return platform_driver_register(&omap_kp_driver);
			}

			static void __exit omap_kp_exit(void)
			{
			platform_driver_unregister(&omap_kp_driver);
			}

			module_init(omap_kp_init);
			module_exit(omap_kp_exit);

			MODULE_AUTHOR("Timo Ters");
			MODULE_DESCRIPTION("OMAP Keypad Driver");
			MODULE_LICENSE("GPL");

include/asm-arm/arch-omap/keypad.h

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -14,7 +14,10 @@ struct omap_kp_platform_data {
	int rows;		int rows;
	int cols;		int cols;
	int *keymap;		int *keymap;
			unsigned int keymapsize;
	unsigned int rep:1;		unsigned int rep:1;
			unsigned long delay;
			unsigned int dbounce:1;
	/* specific to OMAP242x*/		/* specific to OMAP242x*/
	unsigned int *row_gpios;		unsigned int *row_gpios;
	unsigned int *col_gpios;		unsigned int *col_gpios;