drivers/input/misc/mc13783-pwrbutton.c - kernel/common - Git at Google

 /**
  * Copyright (C) 2011 Philippe Rétornaz
  *
  * Based on twl4030-pwrbutton driver by:
  *     Peter De Schrijver <[email protected]>
  *     Felipe Balbi <[email protected]>
  *
  * This file is subject to the terms and conditions of the GNU General
  * Public License. See the file "COPYING" in the main directory of this
  * archive for more details.
  *
  * 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., 51 Franklin Street, Suite 500, Boston, MA 02110-1335  USA
  */

 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/input.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/mc13783.h>
 #include <linux/sched.h>
 #include <linux/slab.h>

 struct mc13783_pwrb {
 	struct input_dev *pwr;
 	struct mc13xxx *mc13783;
 #define MC13783_PWRB_B1_POL_INVERT	(1 << 0)
 #define MC13783_PWRB_B2_POL_INVERT	(1 << 1)
 #define MC13783_PWRB_B3_POL_INVERT	(1 << 2)
 	int flags;
 	unsigned short keymap[3];
 };

 #define MC13783_REG_INTERRUPT_SENSE_1		5
 #define MC13783_IRQSENSE1_ONOFD1S		(1 << 3)
 #define MC13783_IRQSENSE1_ONOFD2S		(1 << 4)
 #define MC13783_IRQSENSE1_ONOFD3S		(1 << 5)

 #define MC13783_REG_POWER_CONTROL_2		15
 #define MC13783_POWER_CONTROL_2_ON1BDBNC	4
 #define MC13783_POWER_CONTROL_2_ON2BDBNC	6
 #define MC13783_POWER_CONTROL_2_ON3BDBNC	8
 #define MC13783_POWER_CONTROL_2_ON1BRSTEN	(1 << 1)
 #define MC13783_POWER_CONTROL_2_ON2BRSTEN	(1 << 2)
 #define MC13783_POWER_CONTROL_2_ON3BRSTEN	(1 << 3)

 static irqreturn_t button_irq(int irq, void *_priv)
 {
 	struct mc13783_pwrb *priv = _priv;
 	int val;

 	mc13xxx_irq_ack(priv->mc13783, irq);
 	mc13xxx_reg_read(priv->mc13783, MC13783_REG_INTERRUPT_SENSE_1, &val);

 	switch (irq) {
 	case MC13783_IRQ_ONOFD1:
 		val = val & MC13783_IRQSENSE1_ONOFD1S ? 1 : 0;
 		if (priv->flags & MC13783_PWRB_B1_POL_INVERT)
 			val ^= 1;
 		input_report_key(priv->pwr, priv->keymap[0], val);
 		break;

 	case MC13783_IRQ_ONOFD2:
 		val = val & MC13783_IRQSENSE1_ONOFD2S ? 1 : 0;
 		if (priv->flags & MC13783_PWRB_B2_POL_INVERT)
 			val ^= 1;
 		input_report_key(priv->pwr, priv->keymap[1], val);
 		break;

 	case MC13783_IRQ_ONOFD3:
 		val = val & MC13783_IRQSENSE1_ONOFD3S ? 1 : 0;
 		if (priv->flags & MC13783_PWRB_B3_POL_INVERT)
 			val ^= 1;
 		input_report_key(priv->pwr, priv->keymap[2], val);
 		break;
 	}

 	input_sync(priv->pwr);

 	return IRQ_HANDLED;
 }

 static int mc13783_pwrbutton_probe(struct platform_device *pdev)
 {
 	const struct mc13xxx_buttons_platform_data *pdata;
 	struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
 	struct input_dev *pwr;
 	struct mc13783_pwrb *priv;
 	int err = 0;
 	int reg = 0;

 	pdata = dev_get_platdata(&pdev->dev);
 	if (!pdata) {
 		dev_err(&pdev->dev, "missing platform data\n");
 		return -ENODEV;
 	}

 	pwr = input_allocate_device();
 	if (!pwr) {
 		dev_dbg(&pdev->dev, "Can't allocate power button\n");
 		return -ENOMEM;
 	}

 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 	if (!priv) {
 		err = -ENOMEM;
 		dev_dbg(&pdev->dev, "Can't allocate power button\n");
 		goto free_input_dev;
 	}

 	reg |= (pdata->b1on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON1BDBNC;
 	reg |= (pdata->b2on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON2BDBNC;
 	reg |= (pdata->b3on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON3BDBNC;

 	priv->pwr = pwr;
 	priv->mc13783 = mc13783;

 	mc13xxx_lock(mc13783);

 	if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) {
 		priv->keymap[0] = pdata->b1on_key;
 		if (pdata->b1on_key != KEY_RESERVED)
 			__set_bit(pdata->b1on_key, pwr->keybit);

 		if (pdata->b1on_flags & MC13783_BUTTON_POL_INVERT)
 			priv->flags |= MC13783_PWRB_B1_POL_INVERT;

 		if (pdata->b1on_flags & MC13783_BUTTON_RESET_EN)
 			reg |= MC13783_POWER_CONTROL_2_ON1BRSTEN;

 		err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD1,
 					  button_irq, "b1on", priv);
 		if (err) {
 			dev_dbg(&pdev->dev, "Can't request irq\n");
 			goto free_priv;
 		}
 	}

 	if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) {
 		priv->keymap[1] = pdata->b2on_key;
 		if (pdata->b2on_key != KEY_RESERVED)
 			__set_bit(pdata->b2on_key, pwr->keybit);

 		if (pdata->b2on_flags & MC13783_BUTTON_POL_INVERT)
 			priv->flags |= MC13783_PWRB_B2_POL_INVERT;

 		if (pdata->b2on_flags & MC13783_BUTTON_RESET_EN)
 			reg |= MC13783_POWER_CONTROL_2_ON2BRSTEN;

 		err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD2,
 					  button_irq, "b2on", priv);
 		if (err) {
 			dev_dbg(&pdev->dev, "Can't request irq\n");
 			goto free_irq_b1;
 		}
 	}

 	if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) {
 		priv->keymap[2] = pdata->b3on_key;
 		if (pdata->b3on_key != KEY_RESERVED)
 			__set_bit(pdata->b3on_key, pwr->keybit);

 		if (pdata->b3on_flags & MC13783_BUTTON_POL_INVERT)
 			priv->flags |= MC13783_PWRB_B3_POL_INVERT;

 		if (pdata->b3on_flags & MC13783_BUTTON_RESET_EN)
 			reg |= MC13783_POWER_CONTROL_2_ON3BRSTEN;

 		err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD3,
 					  button_irq, "b3on", priv);
 		if (err) {
 			dev_dbg(&pdev->dev, "Can't request irq: %d\n", err);
 			goto free_irq_b2;
 		}
 	}

 	mc13xxx_reg_rmw(mc13783, MC13783_REG_POWER_CONTROL_2, 0x3FE, reg);

 	mc13xxx_unlock(mc13783);

 	pwr->name = "mc13783_pwrbutton";
 	pwr->phys = "mc13783_pwrbutton/input0";
 	pwr->dev.parent = &pdev->dev;

 	pwr->keycode = priv->keymap;
 	pwr->keycodemax = ARRAY_SIZE(priv->keymap);
 	pwr->keycodesize = sizeof(priv->keymap[0]);
 	__set_bit(EV_KEY, pwr->evbit);

 	err = input_register_device(pwr);
 	if (err) {
 		dev_dbg(&pdev->dev, "Can't register power button: %d\n", err);
 		goto free_irq;
 	}

 	platform_set_drvdata(pdev, priv);

 	return 0;

 free_irq:
 	mc13xxx_lock(mc13783);

 	if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
 		mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD3, priv);

 free_irq_b2:
 	if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
 		mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD2, priv);

 free_irq_b1:
 	if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
 		mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD1, priv);

 free_priv:
 	mc13xxx_unlock(mc13783);
 	kfree(priv);

 free_input_dev:
 	input_free_device(pwr);

 	return err;
 }

 static int mc13783_pwrbutton_remove(struct platform_device *pdev)
 {
 	struct mc13783_pwrb *priv = platform_get_drvdata(pdev);
 	const struct mc13xxx_buttons_platform_data *pdata;

 	pdata = dev_get_platdata(&pdev->dev);

 	mc13xxx_lock(priv->mc13783);

 	if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
 		mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD3, priv);
 	if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
 		mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD2, priv);
 	if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
 		mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD1, priv);

 	mc13xxx_unlock(priv->mc13783);

 	input_unregister_device(priv->pwr);
 	kfree(priv);

 	return 0;
 }

 static struct platform_driver mc13783_pwrbutton_driver = {
 	.probe		= mc13783_pwrbutton_probe,
 	.remove		= mc13783_pwrbutton_remove,
 	.driver		= {
 		.name	= "mc13783-pwrbutton",
 	},
 };

 module_platform_driver(mc13783_pwrbutton_driver);

 MODULE_ALIAS("platform:mc13783-pwrbutton");
 MODULE_DESCRIPTION("MC13783 Power Button");
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Philippe Retornaz");
	/**
	* Copyright (C) 2011 Philippe Rétornaz
	*
	* Based on twl4030-pwrbutton driver by:
	* Peter De Schrijver <[email protected]>
	* Felipe Balbi <[email protected]>
	*
	* This file is subject to the terms and conditions of the GNU General
	* Public License. See the file "COPYING" in the main directory of this
	* archive for more details.
	*
	* 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., 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
	*/

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/errno.h>
	#include <linux/input.h>
	#include <linux/interrupt.h>
	#include <linux/platform_device.h>
	#include <linux/mfd/mc13783.h>
	#include <linux/sched.h>
	#include <linux/slab.h>

	struct mc13783_pwrb {
	struct input_dev *pwr;
	struct mc13xxx *mc13783;
	#define MC13783_PWRB_B1_POL_INVERT (1 << 0)
	#define MC13783_PWRB_B2_POL_INVERT (1 << 1)
	#define MC13783_PWRB_B3_POL_INVERT (1 << 2)
	int flags;
	unsigned short keymap[3];
	};

	#define MC13783_REG_INTERRUPT_SENSE_1 5
	#define MC13783_IRQSENSE1_ONOFD1S (1 << 3)
	#define MC13783_IRQSENSE1_ONOFD2S (1 << 4)
	#define MC13783_IRQSENSE1_ONOFD3S (1 << 5)

	#define MC13783_REG_POWER_CONTROL_2 15
	#define MC13783_POWER_CONTROL_2_ON1BDBNC 4
	#define MC13783_POWER_CONTROL_2_ON2BDBNC 6
	#define MC13783_POWER_CONTROL_2_ON3BDBNC 8
	#define MC13783_POWER_CONTROL_2_ON1BRSTEN (1 << 1)
	#define MC13783_POWER_CONTROL_2_ON2BRSTEN (1 << 2)
	#define MC13783_POWER_CONTROL_2_ON3BRSTEN (1 << 3)

	static irqreturn_t button_irq(int irq, void *_priv)
	{
	struct mc13783_pwrb *priv = _priv;
	int val;

	mc13xxx_irq_ack(priv->mc13783, irq);
	mc13xxx_reg_read(priv->mc13783, MC13783_REG_INTERRUPT_SENSE_1, &val);

	switch (irq) {
	case MC13783_IRQ_ONOFD1:
	val = val & MC13783_IRQSENSE1_ONOFD1S ? 1 : 0;
	if (priv->flags & MC13783_PWRB_B1_POL_INVERT)
	val ^= 1;
	input_report_key(priv->pwr, priv->keymap[0], val);
	break;

	case MC13783_IRQ_ONOFD2:
	val = val & MC13783_IRQSENSE1_ONOFD2S ? 1 : 0;
	if (priv->flags & MC13783_PWRB_B2_POL_INVERT)
	val ^= 1;
	input_report_key(priv->pwr, priv->keymap[1], val);
	break;

	case MC13783_IRQ_ONOFD3:
	val = val & MC13783_IRQSENSE1_ONOFD3S ? 1 : 0;
	if (priv->flags & MC13783_PWRB_B3_POL_INVERT)
	val ^= 1;
	input_report_key(priv->pwr, priv->keymap[2], val);
	break;
	}

	input_sync(priv->pwr);

	return IRQ_HANDLED;
	}

	static int mc13783_pwrbutton_probe(struct platform_device *pdev)
	{
	const struct mc13xxx_buttons_platform_data *pdata;
	struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
	struct input_dev *pwr;
	struct mc13783_pwrb *priv;
	int err = 0;
	int reg = 0;

	pdata = dev_get_platdata(&pdev->dev);
	if (!pdata) {
	dev_err(&pdev->dev, "missing platform data\n");
	return -ENODEV;
	}

	pwr = input_allocate_device();
	if (!pwr) {
	dev_dbg(&pdev->dev, "Can't allocate power button\n");
	return -ENOMEM;
	}

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv) {
	err = -ENOMEM;
	dev_dbg(&pdev->dev, "Can't allocate power button\n");
	goto free_input_dev;
	}

	reg \|= (pdata->b1on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON1BDBNC;
	reg \|= (pdata->b2on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON2BDBNC;
	reg \|= (pdata->b3on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON3BDBNC;

	priv->pwr = pwr;
	priv->mc13783 = mc13783;

	mc13xxx_lock(mc13783);

	if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) {
	priv->keymap[0] = pdata->b1on_key;
	if (pdata->b1on_key != KEY_RESERVED)
	__set_bit(pdata->b1on_key, pwr->keybit);

	if (pdata->b1on_flags & MC13783_BUTTON_POL_INVERT)
	priv->flags \|= MC13783_PWRB_B1_POL_INVERT;

	if (pdata->b1on_flags & MC13783_BUTTON_RESET_EN)
	reg \|= MC13783_POWER_CONTROL_2_ON1BRSTEN;

	err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD1,
	button_irq, "b1on", priv);
	if (err) {
	dev_dbg(&pdev->dev, "Can't request irq\n");
	goto free_priv;
	}
	}

	if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) {
	priv->keymap[1] = pdata->b2on_key;
	if (pdata->b2on_key != KEY_RESERVED)
	__set_bit(pdata->b2on_key, pwr->keybit);

	if (pdata->b2on_flags & MC13783_BUTTON_POL_INVERT)
	priv->flags \|= MC13783_PWRB_B2_POL_INVERT;

	if (pdata->b2on_flags & MC13783_BUTTON_RESET_EN)
	reg \|= MC13783_POWER_CONTROL_2_ON2BRSTEN;

	err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD2,
	button_irq, "b2on", priv);
	if (err) {
	dev_dbg(&pdev->dev, "Can't request irq\n");
	goto free_irq_b1;
	}
	}

	if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) {
	priv->keymap[2] = pdata->b3on_key;
	if (pdata->b3on_key != KEY_RESERVED)
	__set_bit(pdata->b3on_key, pwr->keybit);

	if (pdata->b3on_flags & MC13783_BUTTON_POL_INVERT)
	priv->flags \|= MC13783_PWRB_B3_POL_INVERT;

	if (pdata->b3on_flags & MC13783_BUTTON_RESET_EN)
	reg \|= MC13783_POWER_CONTROL_2_ON3BRSTEN;

	err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD3,
	button_irq, "b3on", priv);
	if (err) {
	dev_dbg(&pdev->dev, "Can't request irq: %d\n", err);
	goto free_irq_b2;
	}
	}

	mc13xxx_reg_rmw(mc13783, MC13783_REG_POWER_CONTROL_2, 0x3FE, reg);

	mc13xxx_unlock(mc13783);

	pwr->name = "mc13783_pwrbutton";
	pwr->phys = "mc13783_pwrbutton/input0";
	pwr->dev.parent = &pdev->dev;

	pwr->keycode = priv->keymap;
	pwr->keycodemax = ARRAY_SIZE(priv->keymap);
	pwr->keycodesize = sizeof(priv->keymap[0]);
	__set_bit(EV_KEY, pwr->evbit);

	err = input_register_device(pwr);
	if (err) {
	dev_dbg(&pdev->dev, "Can't register power button: %d\n", err);
	goto free_irq;
	}

	platform_set_drvdata(pdev, priv);

	return 0;

	free_irq:
	mc13xxx_lock(mc13783);

	if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
	mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD3, priv);

	free_irq_b2:
	if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
	mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD2, priv);

	free_irq_b1:
	if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
	mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD1, priv);

	free_priv:
	mc13xxx_unlock(mc13783);
	kfree(priv);

	free_input_dev:
	input_free_device(pwr);

	return err;
	}

	static int mc13783_pwrbutton_remove(struct platform_device *pdev)
	{
	struct mc13783_pwrb *priv = platform_get_drvdata(pdev);
	const struct mc13xxx_buttons_platform_data *pdata;

	pdata = dev_get_platdata(&pdev->dev);

	mc13xxx_lock(priv->mc13783);

	if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
	mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD3, priv);
	if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
	mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD2, priv);
	if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
	mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD1, priv);

	mc13xxx_unlock(priv->mc13783);

	input_unregister_device(priv->pwr);
	kfree(priv);

	return 0;
	}

	static struct platform_driver mc13783_pwrbutton_driver = {
	.probe = mc13783_pwrbutton_probe,
	.remove = mc13783_pwrbutton_remove,
	.driver = {
	.name = "mc13783-pwrbutton",
	},
	};

	module_platform_driver(mc13783_pwrbutton_driver);

	MODULE_ALIAS("platform:mc13783-pwrbutton");
	MODULE_DESCRIPTION("MC13783 Power Button");
	MODULE_LICENSE("GPL v2");
	MODULE_AUTHOR("Philippe Retornaz");