[mirror_ubuntu-bionic-kernel.git] / drivers / input / keyboard / bf54x-keys.c

/*
 * File:         drivers/input/keyboard/bf54x-keys.c
 * Based on:
 * Author:       Michael Hennerich <hennerich@blackfin.uclinux.org>
 *
 * Created:
 * Description:  keypad driver for Analog Devices Blackfin BF54x Processors
 *
 *
 * Modified:
 *               Copyright 2007-2008 Analog Devices Inc.
 *
 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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, see the file COPYING, or write
 * to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/module.h>

#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/pm.h>
#include <linux/sysctl.h>
#include <linux/proc_fs.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/input.h>

#include <asm/portmux.h>
#include <mach/bf54x_keys.h>

#define DRV_NAME	"bf54x-keys"
#define TIME_SCALE	100	/* 100 ns */
#define	MAX_MULT	(0xFF * TIME_SCALE)
#define MAX_RC		8	/* Max Row/Col */

static const u16 per_rows[] = {
	P_KEY_ROW7,
	P_KEY_ROW6,
	P_KEY_ROW5,
	P_KEY_ROW4,
	P_KEY_ROW3,
	P_KEY_ROW2,
	P_KEY_ROW1,
	P_KEY_ROW0,
	0
};

static const u16 per_cols[] = {
	P_KEY_COL7,
	P_KEY_COL6,
	P_KEY_COL5,
	P_KEY_COL4,
	P_KEY_COL3,
	P_KEY_COL2,
	P_KEY_COL1,
	P_KEY_COL0,
	0
};

struct bf54x_kpad {
	struct input_dev *input;
	int irq;
	unsigned short lastkey;
	unsigned short *keycode;
	struct timer_list timer;
	unsigned int keyup_test_jiffies;
	unsigned short kpad_msel;
	unsigned short kpad_prescale;
	unsigned short kpad_ctl;
};

static inline int bfin_kpad_find_key(struct bf54x_kpad *bf54x_kpad,
			struct input_dev *input, u16 keyident)
{
	u16 i;

	for (i = 0; i < input->keycodemax; i++)
		if (bf54x_kpad->keycode[i + input->keycodemax] == keyident)
			return bf54x_kpad->keycode[i];
	return -1;
}

static inline void bfin_keycodecpy(unsigned short *keycode,
			const unsigned int *pdata_kc,
			unsigned short keymapsize)
{
	unsigned int i;

	for (i = 0; i < keymapsize; i++) {
		keycode[i] = pdata_kc[i] & 0xffff;
		keycode[i + keymapsize] = pdata_kc[i] >> 16;
	}
}

static inline u16 bfin_kpad_get_prescale(u32 timescale)
{
	u32 sclk = get_sclk();

	return ((((sclk / 1000) * timescale) / 1024) - 1);
}

static inline u16 bfin_kpad_get_keypressed(struct bf54x_kpad *bf54x_kpad)
{
	return (bfin_read_KPAD_STAT() & KPAD_PRESSED);
}

static inline void bfin_kpad_clear_irq(void)
{
	bfin_write_KPAD_STAT(0xFFFF);
	bfin_write_KPAD_ROWCOL(0xFFFF);
}

static void bfin_kpad_timer(unsigned long data)
{
	struct platform_device *pdev =  (struct platform_device *) data;
	struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);

	if (bfin_kpad_get_keypressed(bf54x_kpad)) {
		/* Try again later */
		mod_timer(&bf54x_kpad->timer,
			  jiffies + bf54x_kpad->keyup_test_jiffies);
		return;
	}

	input_report_key(bf54x_kpad->input, bf54x_kpad->lastkey, 0);
	input_sync(bf54x_kpad->input);

	/* Clear IRQ Status */

	bfin_kpad_clear_irq();
	enable_irq(bf54x_kpad->irq);
}

static irqreturn_t bfin_kpad_isr(int irq, void *dev_id)
{
	struct platform_device *pdev = dev_id;
	struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);
	struct input_dev *input = bf54x_kpad->input;
	int key;
	u16 rowcol = bfin_read_KPAD_ROWCOL();

	key = bfin_kpad_find_key(bf54x_kpad, input, rowcol);

	input_report_key(input, key, 1);
	input_sync(input);

	if (bfin_kpad_get_keypressed(bf54x_kpad)) {
		disable_irq_nosync(bf54x_kpad->irq);
		bf54x_kpad->lastkey = key;
		mod_timer(&bf54x_kpad->timer,
			  jiffies + bf54x_kpad->keyup_test_jiffies);
	} else {
		input_report_key(input, key, 0);
		input_sync(input);

		bfin_kpad_clear_irq();
	}

	return IRQ_HANDLED;
}

static int bfin_kpad_probe(struct platform_device *pdev)
{
	struct bf54x_kpad *bf54x_kpad;
	struct bfin_kpad_platform_data *pdata = dev_get_platdata(&pdev->dev);
	struct input_dev *input;
	int i, error;

	if (!pdata->rows || !pdata->cols || !pdata->keymap) {
		dev_err(&pdev->dev, "no rows, cols or keymap from pdata\n");
		return -EINVAL;
	}

	if (!pdata->keymapsize ||
	    pdata->keymapsize > (pdata->rows * pdata->cols)) {
		dev_err(&pdev->dev, "invalid keymapsize\n");
		return -EINVAL;
	}

	bf54x_kpad = kzalloc(sizeof(struct bf54x_kpad), GFP_KERNEL);
	if (!bf54x_kpad)
		return -ENOMEM;

	platform_set_drvdata(pdev, bf54x_kpad);

	/* Allocate memory for keymap followed by private LUT */
	bf54x_kpad->keycode = kmalloc(pdata->keymapsize *
					sizeof(unsigned short) * 2, GFP_KERNEL);
	if (!bf54x_kpad->keycode) {
		error = -ENOMEM;
		goto out;
	}

	if (!pdata->debounce_time || pdata->debounce_time > MAX_MULT ||
	    !pdata->coldrive_time || pdata->coldrive_time > MAX_MULT) {
		dev_warn(&pdev->dev,
			"invalid platform debounce/columndrive time\n");
		bfin_write_KPAD_MSEL(0xFF0);	/* Default MSEL	*/
	} else {
		bfin_write_KPAD_MSEL(
			((pdata->debounce_time / TIME_SCALE)
						& DBON_SCALE) |
			(((pdata->coldrive_time / TIME_SCALE) << 8)
						& COLDRV_SCALE));

	}

	if (!pdata->keyup_test_interval)
		bf54x_kpad->keyup_test_jiffies = msecs_to_jiffies(50);
	else
		bf54x_kpad->keyup_test_jiffies =
			msecs_to_jiffies(pdata->keyup_test_interval);

	if (peripheral_request_list((u16 *)&per_rows[MAX_RC - pdata->rows],
				    DRV_NAME)) {
		dev_err(&pdev->dev, "requesting peripherals failed\n");
		error = -EFAULT;
		goto out0;
	}

	if (peripheral_request_list((u16 *)&per_cols[MAX_RC - pdata->cols],
				    DRV_NAME)) {
		dev_err(&pdev->dev, "requesting peripherals failed\n");
		error = -EFAULT;
		goto out1;
	}

	bf54x_kpad->irq = platform_get_irq(pdev, 0);
	if (bf54x_kpad->irq < 0) {
		error = -ENODEV;
		goto out2;
	}

	error = request_irq(bf54x_kpad->irq, bfin_kpad_isr,
				0, DRV_NAME, pdev);
	if (error) {
		dev_err(&pdev->dev, "unable to claim irq %d\n",
			bf54x_kpad->irq);
		goto out2;
	}

	input = input_allocate_device();
	if (!input) {
		error = -ENOMEM;
		goto out3;
	}

	bf54x_kpad->input = input;

	input->name = pdev->name;
	input->phys = "bf54x-keys/input0";
	input->dev.parent = &pdev->dev;

	input_set_drvdata(input, bf54x_kpad);

	input->id.bustype = BUS_HOST;
	input->id.vendor = 0x0001;
	input->id.product = 0x0001;
	input->id.version = 0x0100;

	input->keycodesize = sizeof(unsigned short);
	input->keycodemax = pdata->keymapsize;
	input->keycode = bf54x_kpad->keycode;

	bfin_keycodecpy(bf54x_kpad->keycode, pdata->keymap, pdata->keymapsize);

	/* 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++)
		if (bf54x_kpad->keycode[i] <= KEY_MAX)
			__set_bit(bf54x_kpad->keycode[i], input->keybit);
	__clear_bit(KEY_RESERVED, input->keybit);

	error = input_register_device(input);
	if (error) {
		dev_err(&pdev->dev, "unable to register input device\n");
		goto out4;
	}

	/* Init Keypad Key Up/Release test timer */

	setup_timer(&bf54x_kpad->timer, bfin_kpad_timer, (unsigned long) pdev);

	bfin_write_KPAD_PRESCALE(bfin_kpad_get_prescale(TIME_SCALE));

	bfin_write_KPAD_CTL((((pdata->cols - 1) << 13) & KPAD_COLEN) |
				(((pdata->rows - 1) << 10) & KPAD_ROWEN) |
				(2 & KPAD_IRQMODE));

	bfin_write_KPAD_CTL(bfin_read_KPAD_CTL() | KPAD_EN);

	device_init_wakeup(&pdev->dev, 1);

	return 0;

out4:
	input_free_device(input);
out3:
	free_irq(bf54x_kpad->irq, pdev);
out2:
	peripheral_free_list((u16 *)&per_cols[MAX_RC - pdata->cols]);
out1:
	peripheral_free_list((u16 *)&per_rows[MAX_RC - pdata->rows]);
out0:
	kfree(bf54x_kpad->keycode);
out:
	kfree(bf54x_kpad);

	return error;
}

static int bfin_kpad_remove(struct platform_device *pdev)
{
	struct bfin_kpad_platform_data *pdata = dev_get_platdata(&pdev->dev);
	struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);

	del_timer_sync(&bf54x_kpad->timer);
	free_irq(bf54x_kpad->irq, pdev);

	input_unregister_device(bf54x_kpad->input);

	peripheral_free_list((u16 *)&per_rows[MAX_RC - pdata->rows]);
	peripheral_free_list((u16 *)&per_cols[MAX_RC - pdata->cols]);

	kfree(bf54x_kpad->keycode);
	kfree(bf54x_kpad);

	return 0;
}

#ifdef CONFIG_PM
static int bfin_kpad_suspend(struct platform_device *pdev, pm_message_t state)
{
	struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);

	bf54x_kpad->kpad_msel = bfin_read_KPAD_MSEL();
	bf54x_kpad->kpad_prescale = bfin_read_KPAD_PRESCALE();
	bf54x_kpad->kpad_ctl = bfin_read_KPAD_CTL();

	if (device_may_wakeup(&pdev->dev))
		enable_irq_wake(bf54x_kpad->irq);

	return 0;
}

static int bfin_kpad_resume(struct platform_device *pdev)
{
	struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);

	bfin_write_KPAD_MSEL(bf54x_kpad->kpad_msel);
	bfin_write_KPAD_PRESCALE(bf54x_kpad->kpad_prescale);
	bfin_write_KPAD_CTL(bf54x_kpad->kpad_ctl);

	if (device_may_wakeup(&pdev->dev))
		disable_irq_wake(bf54x_kpad->irq);

	return 0;
}
#else
# define bfin_kpad_suspend NULL
# define bfin_kpad_resume  NULL
#endif

static struct platform_driver bfin_kpad_device_driver = {
	.driver		= {
		.name	= DRV_NAME,
	},
	.probe		= bfin_kpad_probe,
	.remove		= bfin_kpad_remove,
	.suspend	= bfin_kpad_suspend,
	.resume		= bfin_kpad_resume,
};
module_platform_driver(bfin_kpad_device_driver);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("Keypad driver for BF54x Processors");
MODULE_ALIAS("platform:bf54x-keys");
Commit	Line	Data
8f740ef3 MH	1	/*
	2	* File: drivers/input/keyboard/bf54x-keys.c
	3	* Based on:
	4	* Author: Michael Hennerich <hennerich@blackfin.uclinux.org>
	5	*
	6	* Created:
	7	* Description: keypad driver for Analog Devices Blackfin BF54x Processors
	8	*
	9	*
	10	* Modified:
108fcb42	11	* Copyright 2007-2008 Analog Devices Inc.
8f740ef3 MH	12	*
	13	* Bugs: Enter bugs at http://blackfin.uclinux.org/
	14	*
	15	* This program is free software; you can redistribute it and/or modify
	16	* it under the terms of the GNU General Public License as published by
	17	* the Free Software Foundation; either version 2 of the License, or
	18	* (at your option) any later version.
	19	*
	20	* This program is distributed in the hope that it will be useful,
	21	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	22	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	23	* GNU General Public License for more details.
	24	*
	25	* You should have received a copy of the GNU General Public License
	26	* along with this program; if not, see the file COPYING, or write
	27	* to the Free Software Foundation, Inc.,
	28	* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	29	*/
	30
	31	#include <linux/module.h>
8f740ef3	32
8f740ef3 MH	33	#include <linux/fs.h>
	34	#include <linux/interrupt.h>
	35	#include <linux/irq.h>
5a0e3ad6	36	#include <linux/slab.h>
8f740ef3 MH	37	#include <linux/sched.h>
	38	#include <linux/pm.h>
	39	#include <linux/sysctl.h>
	40	#include <linux/proc_fs.h>
	41	#include <linux/delay.h>
	42	#include <linux/platform_device.h>
	43	#include <linux/input.h>
8f740ef3 MH	44
8f740ef3 MH	45	#include <asm/portmux.h>
639f6571	46	#include <mach/bf54x_keys.h>
8f740ef3 MH	47
	48	#define DRV_NAME "bf54x-keys"
	49	#define TIME_SCALE 100 /* 100 ns */
	50	#define MAX_MULT (0xFF * TIME_SCALE)
	51	#define MAX_RC 8 /* Max Row/Col */
	52
	53	static const u16 per_rows[] = {
	54	P_KEY_ROW7,
	55	P_KEY_ROW6,
	56	P_KEY_ROW5,
	57	P_KEY_ROW4,
	58	P_KEY_ROW3,
	59	P_KEY_ROW2,
	60	P_KEY_ROW1,
	61	P_KEY_ROW0,
	62	0
	63	};
	64
	65	static const u16 per_cols[] = {
	66	P_KEY_COL7,
	67	P_KEY_COL6,
	68	P_KEY_COL5,
	69	P_KEY_COL4,
	70	P_KEY_COL3,
	71	P_KEY_COL2,
	72	P_KEY_COL1,
	73	P_KEY_COL0,
	74	0
	75	};
	76
	77	struct bf54x_kpad {
	78	struct input_dev *input;
	79	int irq;
	80	unsigned short lastkey;
	81	unsigned short *keycode;
	82	struct timer_list timer;
	83	unsigned int keyup_test_jiffies;
108fcb42 MH	84	unsigned short kpad_msel;
	85	unsigned short kpad_prescale;
	86	unsigned short kpad_ctl;
8f740ef3 MH	87	};
	88
	89	static inline int bfin_kpad_find_key(struct bf54x_kpad *bf54x_kpad,
	90	struct input_dev *input, u16 keyident)
	91	{
	92	u16 i;
	93
	94	for (i = 0; i < input->keycodemax; i++)
	95	if (bf54x_kpad->keycode[i + input->keycodemax] == keyident)
	96	return bf54x_kpad->keycode[i];
	97	return -1;
	98	}
	99
	100	static inline void bfin_keycodecpy(unsigned short *keycode,
	101	const unsigned int *pdata_kc,
	102	unsigned short keymapsize)
	103	{
	104	unsigned int i;
	105
	106	for (i = 0; i < keymapsize; i++) {
	107	keycode[i] = pdata_kc[i] & 0xffff;
	108	keycode[i + keymapsize] = pdata_kc[i] >> 16;
	109	}
	110	}
	111
	112	static inline u16 bfin_kpad_get_prescale(u32 timescale)
	113	{
	114	u32 sclk = get_sclk();
	115
	116	return ((((sclk / 1000) * timescale) / 1024) - 1);
	117	}
	118
	119	static inline u16 bfin_kpad_get_keypressed(struct bf54x_kpad *bf54x_kpad)
	120	{
	121	return (bfin_read_KPAD_STAT() & KPAD_PRESSED);
	122	}
	123
	124	static inline void bfin_kpad_clear_irq(void)
	125	{
	126	bfin_write_KPAD_STAT(0xFFFF);
	127	bfin_write_KPAD_ROWCOL(0xFFFF);
	128	}
	129
	130	static void bfin_kpad_timer(unsigned long data)
	131	{
	132	struct platform_device pdev = (struct platform_device ) data;
	133	struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);
	134
	135	if (bfin_kpad_get_keypressed(bf54x_kpad)) {
	136	/* Try again later */
	137	mod_timer(&bf54x_kpad->timer,
	138	jiffies + bf54x_kpad->keyup_test_jiffies);
	139	return;
	140	}
	141
	142	input_report_key(bf54x_kpad->input, bf54x_kpad->lastkey, 0);
	143	input_sync(bf54x_kpad->input);
	144
	145	/* Clear IRQ Status */
	146
	147	bfin_kpad_clear_irq();
	148	enable_irq(bf54x_kpad->irq);
	149	}
	150
151	static irqreturn_t bfin_kpad_isr(int irq, void *dev_id)
152	{
153	struct platform_device *pdev = dev_id;
154	struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);
155	struct input_dev *input = bf54x_kpad->input;
156	int key;
157	u16 rowcol = bfin_read_KPAD_ROWCOL();
158
159	key = bfin_kpad_find_key(bf54x_kpad, input, rowcol);
160
161	input_report_key(input, key, 1);
162	input_sync(input);
163
164	if (bfin_kpad_get_keypressed(bf54x_kpad)) {
9e49f6c1	165	disable_irq_nosync(bf54x_kpad->irq);
8f740ef3 MH	166	bf54x_kpad->lastkey = key;
	167	mod_timer(&bf54x_kpad->timer,
	168	jiffies + bf54x_kpad->keyup_test_jiffies);
	169	} else {
	170	input_report_key(input, key, 0);
	171	input_sync(input);
	172
	173	bfin_kpad_clear_irq();
	174	}
	175
	176	return IRQ_HANDLED;
	177	}
	178
5298cc4c	179	static int bfin_kpad_probe(struct platform_device *pdev)
8f740ef3 MH	180	{
8f740ef3 MH	181	struct bf54x_kpad *bf54x_kpad;
c838cb3d	182	struct bfin_kpad_platform_data *pdata = dev_get_platdata(&pdev->dev);
8f740ef3 MH	183	struct input_dev *input;
	184	int i, error;
	185
	186	if (!pdata->rows \|\| !pdata->cols \|\| !pdata->keymap) {
11a79260	187	dev_err(&pdev->dev, "no rows, cols or keymap from pdata\n");
8f740ef3 MH	188	return -EINVAL;
	189	}
	190
	191	if (!pdata->keymapsize \|\|
	192	pdata->keymapsize > (pdata->rows * pdata->cols)) {
11a79260	193	dev_err(&pdev->dev, "invalid keymapsize\n");
8f740ef3 MH	194	return -EINVAL;
	195	}
	196
	197	bf54x_kpad = kzalloc(sizeof(struct bf54x_kpad), GFP_KERNEL);
	198	if (!bf54x_kpad)
	199	return -ENOMEM;
	200
	201	platform_set_drvdata(pdev, bf54x_kpad);
	202
	203	/* Allocate memory for keymap followed by private LUT */
	204	bf54x_kpad->keycode = kmalloc(pdata->keymapsize *
	205	sizeof(unsigned short) * 2, GFP_KERNEL);
	206	if (!bf54x_kpad->keycode) {
	207	error = -ENOMEM;
	208	goto out;
	209	}
	210
e8e0c023 RK	211	if (!pdata->debounce_time \|\| pdata->debounce_time > MAX_MULT \|\|
e8e0c023 RK	212	!pdata->coldrive_time \|\| pdata->coldrive_time > MAX_MULT) {
11a79260 MF	213	dev_warn(&pdev->dev,
11a79260 MF	214	"invalid platform debounce/columndrive time\n");
8f740ef3 MH	215	bfin_write_KPAD_MSEL(0xFF0); /* Default MSEL */
	216	} else {
	217	bfin_write_KPAD_MSEL(
	218	((pdata->debounce_time / TIME_SCALE)
	219	& DBON_SCALE) \|
	220	(((pdata->coldrive_time / TIME_SCALE) << 8)
	221	& COLDRV_SCALE));
	222
	223	}
	224
	225	if (!pdata->keyup_test_interval)
	226	bf54x_kpad->keyup_test_jiffies = msecs_to_jiffies(50);
	227	else
	228	bf54x_kpad->keyup_test_jiffies =
	229	msecs_to_jiffies(pdata->keyup_test_interval);
	230
	231	if (peripheral_request_list((u16 *)&per_rows[MAX_RC - pdata->rows],
	232	DRV_NAME)) {
11a79260	233	dev_err(&pdev->dev, "requesting peripherals failed\n");
8f740ef3 MH	234	error = -EFAULT;
	235	goto out0;
	236	}
	237
	238	if (peripheral_request_list((u16 *)&per_cols[MAX_RC - pdata->cols],
	239	DRV_NAME)) {
11a79260	240	dev_err(&pdev->dev, "requesting peripherals failed\n");
8f740ef3 MH	241	error = -EFAULT;
	242	goto out1;
	243	}
	244
	245	bf54x_kpad->irq = platform_get_irq(pdev, 0);
	246	if (bf54x_kpad->irq < 0) {
	247	error = -ENODEV;
	248	goto out2;
	249	}
	250
	251	error = request_irq(bf54x_kpad->irq, bfin_kpad_isr,
3eaa750d	252	0, DRV_NAME, pdev);
8f740ef3	253	if (error) {
11a79260 MF	254	dev_err(&pdev->dev, "unable to claim irq %d\n",
11a79260 MF	255	bf54x_kpad->irq);
8f740ef3 MH	256	goto out2;
	257	}
	258
	259	input = input_allocate_device();
	260	if (!input) {
	261	error = -ENOMEM;
	262	goto out3;
	263	}
	264
	265	bf54x_kpad->input = input;
	266
	267	input->name = pdev->name;
	268	input->phys = "bf54x-keys/input0";
	269	input->dev.parent = &pdev->dev;
	270
	271	input_set_drvdata(input, bf54x_kpad);
	272
	273	input->id.bustype = BUS_HOST;
	274	input->id.vendor = 0x0001;
	275	input->id.product = 0x0001;
	276	input->id.version = 0x0100;
	277
	278	input->keycodesize = sizeof(unsigned short);
	279	input->keycodemax = pdata->keymapsize;
	280	input->keycode = bf54x_kpad->keycode;
	281
	282	bfin_keycodecpy(bf54x_kpad->keycode, pdata->keymap, pdata->keymapsize);
	283
	284	/* setup input device */
	285	__set_bit(EV_KEY, input->evbit);
	286
	287	if (pdata->repeat)
	288	__set_bit(EV_REP, input->evbit);
	289
	290	for (i = 0; i < input->keycodemax; i++)
e4cfb034 AL	291	if (bf54x_kpad->keycode[i] <= KEY_MAX)
e4cfb034 AL	292	__set_bit(bf54x_kpad->keycode[i], input->keybit);
8f740ef3 MH	293	__clear_bit(KEY_RESERVED, input->keybit);
	294
	295	error = input_register_device(input);
	296	if (error) {
11a79260	297	dev_err(&pdev->dev, "unable to register input device\n");
8f740ef3 MH	298	goto out4;
	299	}
	300
	301	/* Init Keypad Key Up/Release test timer */
	302
	303	setup_timer(&bf54x_kpad->timer, bfin_kpad_timer, (unsigned long) pdev);
	304
	305	bfin_write_KPAD_PRESCALE(bfin_kpad_get_prescale(TIME_SCALE));
	306
	307	bfin_write_KPAD_CTL((((pdata->cols - 1) << 13) & KPAD_COLEN) \|
	308	(((pdata->rows - 1) << 10) & KPAD_ROWEN) \|
	309	(2 & KPAD_IRQMODE));
	310
	311	bfin_write_KPAD_CTL(bfin_read_KPAD_CTL() \| KPAD_EN);
	312
d0478d0a MH	313	device_init_wakeup(&pdev->dev, 1);
d0478d0a MH	314
8f740ef3 MH	315	return 0;
	316
	317	out4:
	318	input_free_device(input);
	319	out3:
	320	free_irq(bf54x_kpad->irq, pdev);
	321	out2:
	322	peripheral_free_list((u16 *)&per_cols[MAX_RC - pdata->cols]);
	323	out1:
	324	peripheral_free_list((u16 *)&per_rows[MAX_RC - pdata->rows]);
	325	out0:
	326	kfree(bf54x_kpad->keycode);
	327	out:
	328	kfree(bf54x_kpad);
8f740ef3 MH	329
	330	return error;
	331	}
	332
e2619cf7	333	static int bfin_kpad_remove(struct platform_device *pdev)
8f740ef3	334	{
c838cb3d	335	struct bfin_kpad_platform_data *pdata = dev_get_platdata(&pdev->dev);
8f740ef3 MH	336	struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);
	337
	338	del_timer_sync(&bf54x_kpad->timer);
	339	free_irq(bf54x_kpad->irq, pdev);
	340
	341	input_unregister_device(bf54x_kpad->input);
	342
	343	peripheral_free_list((u16 *)&per_rows[MAX_RC - pdata->rows]);
	344	peripheral_free_list((u16 *)&per_cols[MAX_RC - pdata->cols]);
	345
	346	kfree(bf54x_kpad->keycode);
	347	kfree(bf54x_kpad);
8f740ef3 MH	348
	349	return 0;
	350	}
	351
d0478d0a MH	352	#ifdef CONFIG_PM
	353	static int bfin_kpad_suspend(struct platform_device *pdev, pm_message_t state)
	354	{
	355	struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);
	356
108fcb42 MH	357	bf54x_kpad->kpad_msel = bfin_read_KPAD_MSEL();
	358	bf54x_kpad->kpad_prescale = bfin_read_KPAD_PRESCALE();
	359	bf54x_kpad->kpad_ctl = bfin_read_KPAD_CTL();
	360
d0478d0a MH	361	if (device_may_wakeup(&pdev->dev))
	362	enable_irq_wake(bf54x_kpad->irq);
	363
	364	return 0;
	365	}
	366
	367	static int bfin_kpad_resume(struct platform_device *pdev)
	368	{
	369	struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);
	370
108fcb42 MH	371	bfin_write_KPAD_MSEL(bf54x_kpad->kpad_msel);
	372	bfin_write_KPAD_PRESCALE(bf54x_kpad->kpad_prescale);
	373	bfin_write_KPAD_CTL(bf54x_kpad->kpad_ctl);
	374
d0478d0a MH	375	if (device_may_wakeup(&pdev->dev))
	376	disable_irq_wake(bf54x_kpad->irq);
	377
	378	return 0;
	379	}
	380	#else
	381	# define bfin_kpad_suspend NULL
	382	# define bfin_kpad_resume NULL
	383	#endif
	384
aeec0517	385	static struct platform_driver bfin_kpad_device_driver = {
8f740ef3 MH	386	.driver = {
8f740ef3 MH	387	.name = DRV_NAME,
d0478d0a MH	388	},
d0478d0a MH	389	.probe = bfin_kpad_probe,
1cb0aa88	390	.remove = bfin_kpad_remove,
d0478d0a MH	391	.suspend = bfin_kpad_suspend,
d0478d0a MH	392	.resume = bfin_kpad_resume,
8f740ef3	393	};
5146c84f	394	module_platform_driver(bfin_kpad_device_driver);
8f740ef3 MH	395
	396	MODULE_LICENSE("GPL");
	397	MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
	398	MODULE_DESCRIPTION("Keypad driver for BF54x Processors");
d7b5247b	399	MODULE_ALIAS("platform:bf54x-keys");