[net-next-2.6.git] / drivers / input / misc / pcap_keys.c

/*
 *  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");
Commit	Line	Data
d0a82132 DR	1	/*
	2	* Input driver for PCAP events:
	3	* * Power key
	4	* * Headphone button
	5	*
	6	* Copyright (c) 2008,2009 Ilya Petrov <ilya.muromec@gmail.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/init.h>
	16	#include <linux/interrupt.h>
	17	#include <linux/platform_device.h>
	18	#include <linux/input.h>
	19	#include <linux/mfd/ezx-pcap.h>
	20
	21	struct pcap_keys {
	22	struct pcap_chip *pcap;
	23	struct input_dev *input;
	24	};
	25
	26	/* PCAP2 interrupts us on keypress */
	27	static irqreturn_t pcap_keys_handler(int irq, void *_pcap_keys)
	28	{
	29	struct pcap_keys *pcap_keys = _pcap_keys;
	30	int pirq = irq_to_pcap(pcap_keys->pcap, irq);
	31	u32 pstat;
	32
	33	ezx_pcap_read(pcap_keys->pcap, PCAP_REG_PSTAT, &pstat);
	34	pstat &= 1 << pirq;
	35
	36	switch (pirq) {
	37	case PCAP_IRQ_ONOFF:
	38	input_report_key(pcap_keys->input, KEY_POWER, !pstat);
	39	break;
	40	case PCAP_IRQ_MIC:
	41	input_report_key(pcap_keys->input, KEY_HP, !pstat);
	42	break;
	43	}
	44
	45	input_sync(pcap_keys->input);
	46
	47	return IRQ_HANDLED;
	48	}
	49
	50	static int __devinit pcap_keys_probe(struct platform_device *pdev)
	51	{
	52	int err = -ENOMEM;
	53	struct pcap_keys *pcap_keys;
	54	struct input_dev *input_dev;
	55
	56	pcap_keys = kmalloc(sizeof(struct pcap_keys), GFP_KERNEL);
	57	if (!pcap_keys)
	58	return err;
	59
	60	pcap_keys->pcap = dev_get_drvdata(pdev->dev.parent);
	61
	62	input_dev = input_allocate_device();
	63	if (!input_dev)
	64	goto fail;
65
66	pcap_keys->input = input_dev;
67
68	platform_set_drvdata(pdev, pcap_keys);
69	input_dev->name = pdev->name;
70	input_dev->phys = "pcap-keys/input0";
71	input_dev->id.bustype = BUS_HOST;
72	input_dev->dev.parent = &pdev->dev;
73
74	__set_bit(EV_KEY, input_dev->evbit);
75	__set_bit(KEY_POWER, input_dev->keybit);
76	__set_bit(KEY_HP, input_dev->keybit);
77
78	err = input_register_device(input_dev);
79	if (err)
80	goto fail_allocate;
81
82	err = request_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_ONOFF),
83	pcap_keys_handler, 0, "Power key", pcap_keys);
84	if (err)
85	goto fail_register;
86
87	err = request_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_MIC),
88	pcap_keys_handler, 0, "Headphone button", pcap_keys);
89	if (err)
90	goto fail_pwrkey;
91
92	return 0;
93
94	fail_pwrkey:
95	free_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_ONOFF), pcap_keys);
96	fail_register:
97	input_unregister_device(input_dev);
98	goto fail;
99	fail_allocate:
100	input_free_device(input_dev);
101	fail:
102	kfree(pcap_keys);
103	return err;
104	}
105
106	static int __devexit pcap_keys_remove(struct platform_device *pdev)
107	{
108	struct pcap_keys *pcap_keys = platform_get_drvdata(pdev);
109
110	free_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_ONOFF), pcap_keys);
111	free_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_MIC), pcap_keys);
112
113	input_unregister_device(pcap_keys->input);
114	kfree(pcap_keys);
115
116	return 0;
117	}
118
119	static struct platform_driver pcap_keys_device_driver = {
120	.probe = pcap_keys_probe,
121	.remove = __devexit_p(pcap_keys_remove),
122	.driver = {
123	.name = "pcap-keys",
124	.owner = THIS_MODULE,
125	}
126	};
127
128	static int __init pcap_keys_init(void)
129	{
130	return platform_driver_register(&pcap_keys_device_driver);
131	};
132
133	static void __exit pcap_keys_exit(void)
134	{
135	platform_driver_unregister(&pcap_keys_device_driver);
136	};
137
138	module_init(pcap_keys_init);
139	module_exit(pcap_keys_exit);
140
141	MODULE_DESCRIPTION("Motorola PCAP2 input events driver");
142	MODULE_AUTHOR("Ilya Petrov <ilya.muromec@gmail.com>");
143	MODULE_LICENSE("GPL");
144	MODULE_ALIAS("platform:pcap_keys");