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Commit d0a82132 authored by Daniel Ribeiro's avatar Daniel Ribeiro Committed by Samuel Ortiz
Browse files

input: PCAP2 misc input driver 



This is a driver for misc input events for the PCAP2 PMIC, it handles
the Power key and the Headphone button.

Signed-off-by: default avatarDaniel Ribeiro <drwyrm@gmail.com>
Signed-off-by: default avatarIlya Petrov <ilya.muromec@gmail.com>
Signed-off-by: default avatarAntonio Ospite <ospite@studenti.unina.it>
Acked-by: default avatarDmitry Torokhov <dtor@mail.ru>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 0387e107

drivers/input/misc/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -289,4 +289,14 @@ config INPUT_WM831X_ON 
	  To compile this driver as a module, choose M here: the module

	  will be called wm831x_on.



config INPUT_PCAP

	tristate "Motorola EZX PCAP misc input events"

	depends on EZX_PCAP

	help

	  Say Y here if you want to use Power key and Headphone button

	  on Motorola EZX phones.



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

	  module will be called pcap_keys.



endif

drivers/input/misc/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o 
obj-$(CONFIG_INPUT_IXP4XX_BEEPER)	+= ixp4xx-beeper.o

obj-$(CONFIG_INPUT_KEYSPAN_REMOTE)	+= keyspan_remote.o

obj-$(CONFIG_INPUT_M68K_BEEP)		+= m68kspkr.o

obj-$(CONFIG_INPUT_PCAP)		+= pcap_keys.o

obj-$(CONFIG_INPUT_PCF50633_PMU)	+= pcf50633-input.o

obj-$(CONFIG_INPUT_PCSPKR)		+= pcspkr.o

obj-$(CONFIG_INPUT_POWERMATE)		+= powermate.o
@@ -28,3 +29,4 @@ obj-$(CONFIG_INPUT_UINPUT) += uinput.o 
obj-$(CONFIG_INPUT_WISTRON_BTNS)	+= wistron_btns.o

obj-$(CONFIG_INPUT_WM831X_ON)		+= wm831x-on.o

obj-$(CONFIG_INPUT_YEALINK)		+= yealink.o

drivers/input/misc/pcap_keys.c

0 → 100644
+144 −0
Original line number Diff line number Diff line 
/*

 *  Input driver for PCAP events:

 *   * Power key

 *   * Headphone button

 *

 *  Copyright (c) 2008,2009 Ilya Petrov <ilya.muromec@gmail.com>

 *

 *  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 <linux/init.h>

#include <linux/interrupt.h>

#include <linux/platform_device.h>

#include <linux/input.h>

#include <linux/mfd/ezx-pcap.h>



struct pcap_keys {

	struct pcap_chip *pcap;

	struct input_dev *input;

};



/* PCAP2 interrupts us on keypress */

static irqreturn_t pcap_keys_handler(int irq, void *_pcap_keys)

{

	struct pcap_keys *pcap_keys = _pcap_keys;

	int pirq = irq_to_pcap(pcap_keys->pcap, irq);

	u32 pstat;



	ezx_pcap_read(pcap_keys->pcap, PCAP_REG_PSTAT, &pstat);

	pstat &= 1 << pirq;



	switch (pirq) {

	case PCAP_IRQ_ONOFF:

		input_report_key(pcap_keys->input, KEY_POWER, !pstat);

		break;

	case PCAP_IRQ_MIC:

		input_report_key(pcap_keys->input, KEY_HP, !pstat);

		break;

	}



	input_sync(pcap_keys->input);



	return IRQ_HANDLED;

}



static int __devinit pcap_keys_probe(struct platform_device *pdev)

{

	int err = -ENOMEM;

	struct pcap_keys *pcap_keys;

	struct input_dev *input_dev;



	pcap_keys = kmalloc(sizeof(struct pcap_keys), GFP_KERNEL);

	if (!pcap_keys)

		return err;



	pcap_keys->pcap = dev_get_drvdata(pdev->dev.parent);



	input_dev = input_allocate_device();

	if (!input_dev)

		goto fail;



	pcap_keys->input = input_dev;



	platform_set_drvdata(pdev, pcap_keys);

	input_dev->name = pdev->name;

	input_dev->phys = "pcap-keys/input0";

	input_dev->id.bustype = BUS_HOST;

	input_dev->dev.parent = &pdev->dev;



	__set_bit(EV_KEY, input_dev->evbit);

	__set_bit(KEY_POWER, input_dev->keybit);

	__set_bit(KEY_HP, input_dev->keybit);



	err = input_register_device(input_dev);

	if (err)

		goto fail_allocate;



	err = request_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_ONOFF),

			pcap_keys_handler, 0, "Power key", pcap_keys);

	if (err)

		goto fail_register;



	err = request_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_MIC),

			pcap_keys_handler, 0, "Headphone button", pcap_keys);

	if (err)

		goto fail_pwrkey;



	return 0;



fail_pwrkey:

	free_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_ONOFF), pcap_keys);

fail_register:

	input_unregister_device(input_dev);

	goto fail;

fail_allocate:

	input_free_device(input_dev);

fail:

	kfree(pcap_keys);

	return err;

}



static int __devexit pcap_keys_remove(struct platform_device *pdev)

{

	struct pcap_keys *pcap_keys = platform_get_drvdata(pdev);



	free_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_ONOFF), pcap_keys);

	free_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_MIC), pcap_keys);



	input_unregister_device(pcap_keys->input);

	kfree(pcap_keys);



	return 0;

}



static struct platform_driver pcap_keys_device_driver = {

	.probe		= pcap_keys_probe,

	.remove		= __devexit_p(pcap_keys_remove),

	.driver		= {

		.name	= "pcap-keys",

		.owner	= THIS_MODULE,

	}

};



static int __init pcap_keys_init(void)

{

	return platform_driver_register(&pcap_keys_device_driver);

};



static void __exit pcap_keys_exit(void)

{

	platform_driver_unregister(&pcap_keys_device_driver);

};



module_init(pcap_keys_init);

module_exit(pcap_keys_exit);



MODULE_DESCRIPTION("Motorola PCAP2 input events driver");

MODULE_AUTHOR("Ilya Petrov <ilya.muromec@gmail.com>");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:pcap_keys");