[linux-block.git] / drivers / input / keyboard / adp5520-keys.c

/*
 * Keypad driver for Analog Devices ADP5520 MFD PMICs
 *
 * Copyright 2009 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/mfd/adp5520.h>
#include <linux/slab.h>

struct adp5520_keys {
	struct input_dev *input;
	struct notifier_block notifier;
	struct device *master;
	unsigned short keycode[ADP5520_KEYMAPSIZE];
};

static void adp5520_keys_report_event(struct adp5520_keys *dev,
					unsigned short keymask, int value)
{
	int i;

	for (i = 0; i < ADP5520_MAXKEYS; i++)
		if (keymask & (1 << i))
			input_report_key(dev->input, dev->keycode[i], value);

	input_sync(dev->input);
}

static int adp5520_keys_notifier(struct notifier_block *nb,
				 unsigned long event, void *data)
{
	struct adp5520_keys *dev;
	uint8_t reg_val_lo, reg_val_hi;
	unsigned short keymask;

	dev = container_of(nb, struct adp5520_keys, notifier);

	if (event & ADP5520_KP_INT) {
		adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, &reg_val_lo);
		adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, &reg_val_hi);

		keymask = (reg_val_hi << 8) | reg_val_lo;
		/* Read twice to clear */
		adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, &reg_val_lo);
		adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, &reg_val_hi);
		keymask |= (reg_val_hi << 8) | reg_val_lo;
		adp5520_keys_report_event(dev, keymask, 1);
	}

	if (event & ADP5520_KR_INT) {
		adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, &reg_val_lo);
		adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, &reg_val_hi);

		keymask = (reg_val_hi << 8) | reg_val_lo;
		/* Read twice to clear */
		adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, &reg_val_lo);
		adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, &reg_val_hi);
		keymask |= (reg_val_hi << 8) | reg_val_lo;
		adp5520_keys_report_event(dev, keymask, 0);
	}

	return 0;
}

static int __devinit adp5520_keys_probe(struct platform_device *pdev)
{
	struct adp5520_keys_platform_data *pdata = pdev->dev.platform_data;
	struct input_dev *input;
	struct adp5520_keys *dev;
	int ret, i;
	unsigned char en_mask, ctl_mask = 0;

	if (pdev->id != ID_ADP5520) {
		dev_err(&pdev->dev, "only ADP5520 supports Keypad\n");
		return -EINVAL;
	}

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

	if (!(pdata->rows_en_mask && pdata->cols_en_mask))
		return -EINVAL;

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (dev == NULL) {
		dev_err(&pdev->dev, "failed to alloc memory\n");
		return -ENOMEM;
	}

	input = input_allocate_device();
	if (!input) {
		ret = -ENOMEM;
		goto err;
	}

	dev->master = pdev->dev.parent;
	dev->input = input;

	input->name = pdev->name;
	input->phys = "adp5520-keys/input0";
	input->dev.parent = &pdev->dev;

	input_set_drvdata(input, dev);

	input->id.bustype = BUS_I2C;
	input->id.vendor = 0x0001;
	input->id.product = 0x5520;
	input->id.version = 0x0001;

	input->keycodesize = sizeof(dev->keycode[0]);
	input->keycodemax = pdata->keymapsize;
	input->keycode = dev->keycode;

	memcpy(dev->keycode, pdata->keymap,
		pdata->keymapsize * input->keycodesize);

	/* setup input device */
	__set_bit(EV_KEY, input->evbit);

	if (pdata->repeat)
		__set_bit(EV_REP, input->evbit);

	for (i = 0; i < input->keycodemax; i++)
		__set_bit(dev->keycode[i], input->keybit);
	__clear_bit(KEY_RESERVED, input->keybit);

	ret = input_register_device(input);
	if (ret) {
		dev_err(&pdev->dev, "unable to register input device\n");
		goto err;
	}

	en_mask = pdata->rows_en_mask | pdata->cols_en_mask;

	ret = adp5520_set_bits(dev->master, ADP5520_GPIO_CFG_1, en_mask);

	if (en_mask & ADP5520_COL_C3)
		ctl_mask |= ADP5520_C3_MODE;

	if (en_mask & ADP5520_ROW_R3)
		ctl_mask |= ADP5520_R3_MODE;

	if (ctl_mask)
		ret |= adp5520_set_bits(dev->master, ADP5520_LED_CONTROL,
			ctl_mask);

	ret |= adp5520_set_bits(dev->master, ADP5520_GPIO_PULLUP,
		pdata->rows_en_mask);

	if (ret) {
		dev_err(&pdev->dev, "failed to write\n");
		ret = -EIO;
		goto err1;
	}

	dev->notifier.notifier_call = adp5520_keys_notifier;
	ret = adp5520_register_notifier(dev->master, &dev->notifier,
			ADP5520_KP_IEN | ADP5520_KR_IEN);
	if (ret) {
		dev_err(&pdev->dev, "failed to register notifier\n");
		goto err1;
	}

	platform_set_drvdata(pdev, dev);
	return 0;

err1:
	input_unregister_device(input);
	input = NULL;
err:
	input_free_device(input);
	kfree(dev);
	return ret;
}

static int __devexit adp5520_keys_remove(struct platform_device *pdev)
{
	struct adp5520_keys *dev = platform_get_drvdata(pdev);

	adp5520_unregister_notifier(dev->master, &dev->notifier,
				ADP5520_KP_IEN | ADP5520_KR_IEN);

	input_unregister_device(dev->input);
	kfree(dev);
	return 0;
}

static struct platform_driver adp5520_keys_driver = {
	.driver	= {
		.name	= "adp5520-keys",
		.owner	= THIS_MODULE,
	},
	.probe		= adp5520_keys_probe,
	.remove		= __devexit_p(adp5520_keys_remove),
};

static int __init adp5520_keys_init(void)
{
	return platform_driver_register(&adp5520_keys_driver);
}
module_init(adp5520_keys_init);

static void __exit adp5520_keys_exit(void)
{
	platform_driver_unregister(&adp5520_keys_driver);
}
module_exit(adp5520_keys_exit);

MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("Keys ADP5520 Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:adp5520-keys");
Commit	Line	Data
fba65fe0 MH	1	/*
	2	* Keypad driver for Analog Devices ADP5520 MFD PMICs
	3	*
	4	* Copyright 2009 Analog Devices Inc.
	5	*
	6	* Licensed under the GPL-2 or later.
	7	*/
	8
	9	#include <linux/module.h>
	10	#include <linux/kernel.h>
	11	#include <linux/init.h>
	12	#include <linux/platform_device.h>
	13	#include <linux/input.h>
	14	#include <linux/mfd/adp5520.h>
5a0e3ad6	15	#include <linux/slab.h>
fba65fe0 MH	16
	17	struct adp5520_keys {
	18	struct input_dev *input;
	19	struct notifier_block notifier;
	20	struct device *master;
	21	unsigned short keycode[ADP5520_KEYMAPSIZE];
	22	};
	23
	24	static void adp5520_keys_report_event(struct adp5520_keys *dev,
	25	unsigned short keymask, int value)
	26	{
	27	int i;
	28
	29	for (i = 0; i < ADP5520_MAXKEYS; i++)
	30	if (keymask & (1 << i))
	31	input_report_key(dev->input, dev->keycode[i], value);
	32
	33	input_sync(dev->input);
	34	}
	35
	36	static int adp5520_keys_notifier(struct notifier_block *nb,
	37	unsigned long event, void *data)
	38	{
	39	struct adp5520_keys *dev;
	40	uint8_t reg_val_lo, reg_val_hi;
	41	unsigned short keymask;
	42
	43	dev = container_of(nb, struct adp5520_keys, notifier);
	44
	45	if (event & ADP5520_KP_INT) {
	46	adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, &reg_val_lo);
	47	adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, &reg_val_hi);
	48
	49	keymask = (reg_val_hi << 8) \| reg_val_lo;
	50	/* Read twice to clear */
	51	adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, &reg_val_lo);
	52	adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, &reg_val_hi);
	53	keymask \|= (reg_val_hi << 8) \| reg_val_lo;
	54	adp5520_keys_report_event(dev, keymask, 1);
	55	}
	56
	57	if (event & ADP5520_KR_INT) {
	58	adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, &reg_val_lo);
	59	adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, &reg_val_hi);
	60
	61	keymask = (reg_val_hi << 8) \| reg_val_lo;
	62	/* Read twice to clear */
	63	adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, &reg_val_lo);
	64	adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, &reg_val_hi);
	65	keymask \|= (reg_val_hi << 8) \| reg_val_lo;
	66	adp5520_keys_report_event(dev, keymask, 0);
	67	}
	68
	69	return 0;
	70	}
	71
	72	static int __devinit adp5520_keys_probe(struct platform_device *pdev)
	73	{
	74	struct adp5520_keys_platform_data *pdata = pdev->dev.platform_data;
	75	struct input_dev *input;
	76	struct adp5520_keys *dev;
	77	int ret, i;
	78	unsigned char en_mask, ctl_mask = 0;
	79
80	if (pdev->id != ID_ADP5520) {
81	dev_err(&pdev->dev, "only ADP5520 supports Keypad\n");
82	return -EINVAL;
83	}
84
85	if (pdata == NULL) {
86	dev_err(&pdev->dev, "missing platform data\n");
87	return -EINVAL;
88	}
89
90	if (!(pdata->rows_en_mask && pdata->cols_en_mask))
91	return -EINVAL;
92
93	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
94	if (dev == NULL) {
95	dev_err(&pdev->dev, "failed to alloc memory\n");
96	return -ENOMEM;
97	}
98
99	input = input_allocate_device();
100	if (!input) {
101	ret = -ENOMEM;
102	goto err;
103	}
104
105	dev->master = pdev->dev.parent;
106	dev->input = input;
107
108	input->name = pdev->name;
109	input->phys = "adp5520-keys/input0";
110	input->dev.parent = &pdev->dev;
111
112	input_set_drvdata(input, dev);
113
114	input->id.bustype = BUS_I2C;
115	input->id.vendor = 0x0001;
116	input->id.product = 0x5520;
117	input->id.version = 0x0001;
118
119	input->keycodesize = sizeof(dev->keycode[0]);
120	input->keycodemax = pdata->keymapsize;
121	input->keycode = dev->keycode;
122
123	memcpy(dev->keycode, pdata->keymap,
124	pdata->keymapsize * input->keycodesize);
125
126	/* setup input device */
127	__set_bit(EV_KEY, input->evbit);
128
129	if (pdata->repeat)
130	__set_bit(EV_REP, input->evbit);
131
132	for (i = 0; i < input->keycodemax; i++)
133	__set_bit(dev->keycode[i], input->keybit);
134	__clear_bit(KEY_RESERVED, input->keybit);
135
136	ret = input_register_device(input);
137	if (ret) {
138	dev_err(&pdev->dev, "unable to register input device\n");
139	goto err;
140	}
141
142	en_mask = pdata->rows_en_mask \| pdata->cols_en_mask;
143
144	ret = adp5520_set_bits(dev->master, ADP5520_GPIO_CFG_1, en_mask);
145
146	if (en_mask & ADP5520_COL_C3)
147	ctl_mask \|= ADP5520_C3_MODE;
148
149	if (en_mask & ADP5520_ROW_R3)
150	ctl_mask \|= ADP5520_R3_MODE;
151
152	if (ctl_mask)
153	ret \|= adp5520_set_bits(dev->master, ADP5520_LED_CONTROL,
154	ctl_mask);
155
156	ret \|= adp5520_set_bits(dev->master, ADP5520_GPIO_PULLUP,
157	pdata->rows_en_mask);
158
159	if (ret) {
160	dev_err(&pdev->dev, "failed to write\n");
161	ret = -EIO;
162	goto err1;
163	}
164
165	dev->notifier.notifier_call = adp5520_keys_notifier;
166	ret = adp5520_register_notifier(dev->master, &dev->notifier,
167	ADP5520_KP_IEN \| ADP5520_KR_IEN);
168	if (ret) {
169	dev_err(&pdev->dev, "failed to register notifier\n");
170	goto err1;
171	}
172
173	platform_set_drvdata(pdev, dev);
174	return 0;
175
176	err1:
177	input_unregister_device(input);
178	input = NULL;
179	err:
180	input_free_device(input);
181	kfree(dev);
182	return ret;
183	}
184
185	static int __devexit adp5520_keys_remove(struct platform_device *pdev)
186	{
187	struct adp5520_keys *dev = platform_get_drvdata(pdev);
188
189	adp5520_unregister_notifier(dev->master, &dev->notifier,
190	ADP5520_KP_IEN \| ADP5520_KR_IEN);
191
192	input_unregister_device(dev->input);
193	kfree(dev);
194	return 0;
195	}
196
197	static struct platform_driver adp5520_keys_driver = {
198	.driver = {
199	.name = "adp5520-keys",
200	.owner = THIS_MODULE,
201	},
202	.probe = adp5520_keys_probe,
203	.remove = __devexit_p(adp5520_keys_remove),
204	};
205
206	static int __init adp5520_keys_init(void)
207	{
208	return platform_driver_register(&adp5520_keys_driver);
209	}
210	module_init(adp5520_keys_init);
211
212	static void __exit adp5520_keys_exit(void)
213	{
214	platform_driver_unregister(&adp5520_keys_driver);
215	}
216	module_exit(adp5520_keys_exit);
217
218	MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
219	MODULE_DESCRIPTION("Keys ADP5520 Driver");
220	MODULE_LICENSE("GPL");
221	MODULE_ALIAS("platform:adp5520-keys");