[mirror_ubuntu-bionic-kernel.git] / drivers / input / misc / mc13783-pwrbutton.c

/**
 * Copyright (C) 2011 Philippe Rétornaz
 *
 * Based on twl4030-pwrbutton driver by:
 *     Peter De Schrijver <peter.de-schrijver@nokia.com>
 *     Felipe Balbi <felipe.balbi@nokia.com>
 *
 * 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/init.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 __devinit 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 __devexit 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);
	platform_set_drvdata(pdev, NULL);

	return 0;
}

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

module_platform_driver(mc13783_pwrbutton_driver);

MODULE_ALIAS("platform:mc13783-pwrbutton");
MODULE_DESCRIPTION("MC13783 Power Button");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Philippe Retornaz");
Commit	Line	Data
30fc7ac3 PR	1	/**
	2	* Copyright (C) 2011 Philippe Rétornaz
	3	*
	4	* Based on twl4030-pwrbutton driver by:
	5	* Peter De Schrijver <peter.de-schrijver@nokia.com>
	6	* Felipe Balbi <felipe.balbi@nokia.com>
	7	*
	8	* This file is subject to the terms and conditions of the GNU General
	9	* Public License. See the file "COPYING" in the main directory of this
	10	* archive for more details.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
	20	*/
	21
	22	#include <linux/module.h>
	23	#include <linux/init.h>
	24	#include <linux/kernel.h>
	25	#include <linux/errno.h>
	26	#include <linux/input.h>
	27	#include <linux/interrupt.h>
	28	#include <linux/platform_device.h>
	29	#include <linux/mfd/mc13783.h>
	30	#include <linux/sched.h>
	31	#include <linux/slab.h>
	32
	33	struct mc13783_pwrb {
	34	struct input_dev *pwr;
	35	struct mc13xxx *mc13783;
	36	#define MC13783_PWRB_B1_POL_INVERT (1 << 0)
	37	#define MC13783_PWRB_B2_POL_INVERT (1 << 1)
	38	#define MC13783_PWRB_B3_POL_INVERT (1 << 2)
	39	int flags;
	40	unsigned short keymap[3];
	41	};
	42
	43	#define MC13783_REG_INTERRUPT_SENSE_1 5
	44	#define MC13783_IRQSENSE1_ONOFD1S (1 << 3)
	45	#define MC13783_IRQSENSE1_ONOFD2S (1 << 4)
	46	#define MC13783_IRQSENSE1_ONOFD3S (1 << 5)
	47
	48	#define MC13783_REG_POWER_CONTROL_2 15
	49	#define MC13783_POWER_CONTROL_2_ON1BDBNC 4
	50	#define MC13783_POWER_CONTROL_2_ON2BDBNC 6
	51	#define MC13783_POWER_CONTROL_2_ON3BDBNC 8
	52	#define MC13783_POWER_CONTROL_2_ON1BRSTEN (1 << 1)
	53	#define MC13783_POWER_CONTROL_2_ON2BRSTEN (1 << 2)
	54	#define MC13783_POWER_CONTROL_2_ON3BRSTEN (1 << 3)
	55
	56	static irqreturn_t button_irq(int irq, void *_priv)
	57	{
	58	struct mc13783_pwrb *priv = _priv;
	59	int val;
	60
	61	mc13xxx_irq_ack(priv->mc13783, irq);
	62	mc13xxx_reg_read(priv->mc13783, MC13783_REG_INTERRUPT_SENSE_1, &val);
	63
	64	switch (irq) {
65	case MC13783_IRQ_ONOFD1:
66	val = val & MC13783_IRQSENSE1_ONOFD1S ? 1 : 0;
67	if (priv->flags & MC13783_PWRB_B1_POL_INVERT)
68	val ^= 1;
69	input_report_key(priv->pwr, priv->keymap[0], val);
70	break;
71
72	case MC13783_IRQ_ONOFD2:
73	val = val & MC13783_IRQSENSE1_ONOFD2S ? 1 : 0;
74	if (priv->flags & MC13783_PWRB_B2_POL_INVERT)
75	val ^= 1;
76	input_report_key(priv->pwr, priv->keymap[1], val);
77	break;
78
79	case MC13783_IRQ_ONOFD3:
80	val = val & MC13783_IRQSENSE1_ONOFD3S ? 1 : 0;
81	if (priv->flags & MC13783_PWRB_B3_POL_INVERT)
82	val ^= 1;
83	input_report_key(priv->pwr, priv->keymap[2], val);
84	break;
85	}
86
87	input_sync(priv->pwr);
88
89	return IRQ_HANDLED;
90	}
91
92	static int __devinit mc13783_pwrbutton_probe(struct platform_device *pdev)
93	{
94	const struct mc13xxx_buttons_platform_data *pdata;
95	struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
96	struct input_dev *pwr;
97	struct mc13783_pwrb *priv;
98	int err = 0;
99	int reg = 0;
100
101	pdata = dev_get_platdata(&pdev->dev);
102	if (!pdata) {
103	dev_err(&pdev->dev, "missing platform data\n");
104	return -ENODEV;
105	}
106
107	pwr = input_allocate_device();
108	if (!pwr) {
109	dev_dbg(&pdev->dev, "Can't allocate power button\n");
110	return -ENOMEM;
111	}
112
113	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
114	if (!priv) {
115	err = -ENOMEM;
116	dev_dbg(&pdev->dev, "Can't allocate power button\n");
117	goto free_input_dev;
118	}
119
120	reg \|= (pdata->b1on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON1BDBNC;
121	reg \|= (pdata->b2on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON2BDBNC;
122	reg \|= (pdata->b3on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON3BDBNC;
123
124	priv->pwr = pwr;
125	priv->mc13783 = mc13783;
126
127	mc13xxx_lock(mc13783);
128
129	if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) {
130	priv->keymap[0] = pdata->b1on_key;
131	if (pdata->b1on_key != KEY_RESERVED)
132	__set_bit(pdata->b1on_key, pwr->keybit);
133
134	if (pdata->b1on_flags & MC13783_BUTTON_POL_INVERT)
135	priv->flags \|= MC13783_PWRB_B1_POL_INVERT;
136
137	if (pdata->b1on_flags & MC13783_BUTTON_RESET_EN)
138	reg \|= MC13783_POWER_CONTROL_2_ON1BRSTEN;
139
140	err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD1,
141	button_irq, "b1on", priv);
142	if (err) {
143	dev_dbg(&pdev->dev, "Can't request irq\n");
144	goto free_priv;
145	}
146	}
147
148	if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) {
149	priv->keymap[1] = pdata->b2on_key;
150	if (pdata->b2on_key != KEY_RESERVED)
151	__set_bit(pdata->b2on_key, pwr->keybit);
152
153	if (pdata->b2on_flags & MC13783_BUTTON_POL_INVERT)
154	priv->flags \|= MC13783_PWRB_B2_POL_INVERT;
155
156	if (pdata->b2on_flags & MC13783_BUTTON_RESET_EN)
157	reg \|= MC13783_POWER_CONTROL_2_ON2BRSTEN;
158
159	err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD2,
160	button_irq, "b2on", priv);
161	if (err) {
162	dev_dbg(&pdev->dev, "Can't request irq\n");
163	goto free_irq_b1;
164	}
165	}
166
167	if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) {
168	priv->keymap[2] = pdata->b3on_key;
169	if (pdata->b3on_key != KEY_RESERVED)
170	__set_bit(pdata->b3on_key, pwr->keybit);
171
172	if (pdata->b3on_flags & MC13783_BUTTON_POL_INVERT)
173	priv->flags \|= MC13783_PWRB_B3_POL_INVERT;
174
175	if (pdata->b3on_flags & MC13783_BUTTON_RESET_EN)
176	reg \|= MC13783_POWER_CONTROL_2_ON3BRSTEN;
177
178	err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD3,
179	button_irq, "b3on", priv);
180	if (err) {
181	dev_dbg(&pdev->dev, "Can't request irq: %d\n", err);
182	goto free_irq_b2;
183	}
184	}
185
186	mc13xxx_reg_rmw(mc13783, MC13783_REG_POWER_CONTROL_2, 0x3FE, reg);
187
188	mc13xxx_unlock(mc13783);
189
190	pwr->name = "mc13783_pwrbutton";
191	pwr->phys = "mc13783_pwrbutton/input0";
192	pwr->dev.parent = &pdev->dev;
193
194	pwr->keycode = priv->keymap;
195	pwr->keycodemax = ARRAY_SIZE(priv->keymap);
196	pwr->keycodesize = sizeof(priv->keymap[0]);
197	__set_bit(EV_KEY, pwr->evbit);
198
199	err = input_register_device(pwr);
200	if (err) {
201	dev_dbg(&pdev->dev, "Can't register power button: %d\n", err);
202	goto free_irq;
203	}
204
205	platform_set_drvdata(pdev, priv);
206
207	return 0;
208
209	free_irq:
210	mc13xxx_lock(mc13783);
211
212	if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
213	mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD3, priv);
214
215	free_irq_b2:
216	if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
217	mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD2, priv);
218
219	free_irq_b1:
220	if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
221	mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD1, priv);
222
223	free_priv:
224	mc13xxx_unlock(mc13783);
225	kfree(priv);
226
227	free_input_dev:
228	input_free_device(pwr);
229
230	return err;
231	}
232
233	static int __devexit mc13783_pwrbutton_remove(struct platform_device *pdev)
234	{
235	struct mc13783_pwrb *priv = platform_get_drvdata(pdev);
236	const struct mc13xxx_buttons_platform_data *pdata;
237
238	pdata = dev_get_platdata(&pdev->dev);
239
240	mc13xxx_lock(priv->mc13783);
241
242	if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
243	mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD3, priv);
244	if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
245	mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD2, priv);
246	if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
247	mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD1, priv);
248
249	mc13xxx_unlock(priv->mc13783);
250
251	input_unregister_device(priv->pwr);
252	kfree(priv);
253	platform_set_drvdata(pdev, NULL);
254
255	return 0;
256	}
257
18b2b181	258	static struct platform_driver mc13783_pwrbutton_driver = {
30fc7ac3 PR	259	.probe = mc13783_pwrbutton_probe,
	260	.remove = __devexit_p(mc13783_pwrbutton_remove),
	261	.driver = {
	262	.name = "mc13783-pwrbutton",
	263	.owner = THIS_MODULE,
	264	},
	265	};
	266
18b2b181	267	module_platform_driver(mc13783_pwrbutton_driver);
30fc7ac3 PR	268
	269	MODULE_ALIAS("platform:mc13783-pwrbutton");
	270	MODULE_DESCRIPTION("MC13783 Power Button");
	271	MODULE_LICENSE("GPL v2");
	272	MODULE_AUTHOR("Philippe Retornaz");