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

/*
 * LoCoMo keyboard driver for Linux-based ARM PDAs:
 * 	- SHARP Zaurus Collie (SL-5500)
 * 	- SHARP Zaurus Poodle (SL-5600)
 *
 * Copyright (c) 2005 John Lenz
 * Based on from xtkbd.c
 *
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>

#include <asm/hardware/locomo.h>
#include <asm/irq.h>

MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
MODULE_DESCRIPTION("LoCoMo keyboard driver");
MODULE_LICENSE("GPL");

#define LOCOMOKBD_NUMKEYS	128

#define KEY_ACTIVITY		KEY_F16
#define KEY_CONTACT		KEY_F18
#define KEY_CENTER		KEY_F15

static const unsigned char
locomokbd_keycode[LOCOMOKBD_NUMKEYS] = {
	0, KEY_ESC, KEY_ACTIVITY, 0, 0, 0, 0, 0, 0, 0,				/* 0 - 9 */
	0, 0, 0, 0, 0, 0, 0, KEY_MENU, KEY_HOME, KEY_CONTACT,			/* 10 - 19 */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,						/* 20 - 29 */
	0, 0, 0, KEY_CENTER, 0, KEY_MAIL, 0, 0, 0, 0,				/* 30 - 39 */
	0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_RIGHT,					/* 40 - 49 */
	KEY_UP, KEY_LEFT, 0, 0, KEY_P, 0, KEY_O, KEY_I, KEY_Y, KEY_T,		/* 50 - 59 */
	KEY_E, KEY_W, 0, 0, 0, 0, KEY_DOWN, KEY_ENTER, 0, 0,			/* 60 - 69 */
	KEY_BACKSPACE, 0, KEY_L, KEY_U, KEY_H, KEY_R, KEY_D, KEY_Q, 0, 0,	/* 70 - 79 */
	0, 0, 0, 0, 0, 0, KEY_ENTER, KEY_RIGHTSHIFT, KEY_K, KEY_J,		/* 80 - 89 */
	KEY_G, KEY_F, KEY_X, KEY_S, 0, 0, 0, 0, 0, 0,				/* 90 - 99 */
	0, 0, KEY_DOT, 0, KEY_COMMA, KEY_N, KEY_B, KEY_C, KEY_Z, KEY_A,		/* 100 - 109 */
	KEY_LEFTSHIFT, KEY_TAB, KEY_LEFTCTRL, 0, 0, 0, 0, 0, 0, 0,		/* 110 - 119 */
	KEY_M, KEY_SPACE, KEY_V, KEY_APOSTROPHE, KEY_SLASH, 0, 0, 0		/* 120 - 128 */
};

#define KB_ROWS			16
#define KB_COLS			8
#define KB_ROWMASK(r)		(1 << (r))
#define SCANCODE(c,r)		( ((c)<<4) + (r) + 1 )

#define KB_DELAY		8
#define SCAN_INTERVAL		(HZ/10)

struct locomokbd {
	unsigned char keycode[LOCOMOKBD_NUMKEYS];
	struct input_dev *input;
	char phys[32];

	unsigned long base;
	spinlock_t lock;

	struct timer_list timer;
	unsigned long suspend_jiffies;
	unsigned int count_cancel;
};

/* helper functions for reading the keyboard matrix */
static inline void locomokbd_charge_all(unsigned long membase)
{
	locomo_writel(0x00FF, membase + LOCOMO_KSC);
}

static inline void locomokbd_activate_all(unsigned long membase)
{
	unsigned long r;

	locomo_writel(0, membase + LOCOMO_KSC);
	r = locomo_readl(membase + LOCOMO_KIC);
	r &= 0xFEFF;
	locomo_writel(r, membase + LOCOMO_KIC);
}

static inline void locomokbd_activate_col(unsigned long membase, int col)
{
	unsigned short nset;
	unsigned short nbset;

	nset = 0xFF & ~(1 << col);
	nbset = (nset << 8) + nset;
	locomo_writel(nbset, membase + LOCOMO_KSC);
}

static inline void locomokbd_reset_col(unsigned long membase, int col)
{
	unsigned short nbset;

	nbset = ((0xFF & ~(1 << col)) << 8) + 0xFF;
	locomo_writel(nbset, membase + LOCOMO_KSC);
}

/*
 * The LoCoMo keyboard only generates interrupts when a key is pressed.
 * So when a key is pressed, we enable a timer.  This timer scans the
 * keyboard, and this is how we detect when the key is released.
 */

/* Scan the hardware keyboard and push any changes up through the input layer */
static void locomokbd_scankeyboard(struct locomokbd *locomokbd)
{
	unsigned int row, col, rowd;
	unsigned long flags;
	unsigned int num_pressed;
	unsigned long membase = locomokbd->base;

	spin_lock_irqsave(&locomokbd->lock, flags);

	locomokbd_charge_all(membase);

	num_pressed = 0;
	for (col = 0; col < KB_COLS; col++) {

		locomokbd_activate_col(membase, col);
		udelay(KB_DELAY);

		rowd = ~locomo_readl(membase + LOCOMO_KIB);
		for (row = 0; row < KB_ROWS; row++) {
			unsigned int scancode, pressed, key;

			scancode = SCANCODE(col, row);
			pressed = rowd & KB_ROWMASK(row);
			key = locomokbd->keycode[scancode];

			input_report_key(locomokbd->input, key, pressed);
			if (likely(!pressed))
				continue;

			num_pressed++;

			/* The "Cancel/ESC" key is labeled "On/Off" on
			 * Collie and Poodle and should suspend the device
			 * if it was pressed for more than a second. */
			if (unlikely(key == KEY_ESC)) {
				if (!time_after(jiffies,
					locomokbd->suspend_jiffies + HZ))
					continue;
				if (locomokbd->count_cancel++
					!= (HZ/SCAN_INTERVAL + 1))
					continue;
				input_event(locomokbd->input, EV_PWR,
					KEY_SUSPEND, 1);
				locomokbd->suspend_jiffies = jiffies;
			} else
				locomokbd->count_cancel = 0;
		}
		locomokbd_reset_col(membase, col);
	}
	locomokbd_activate_all(membase);

	input_sync(locomokbd->input);

	/* if any keys are pressed, enable the timer */
	if (num_pressed)
		mod_timer(&locomokbd->timer, jiffies + SCAN_INTERVAL);
	else
		locomokbd->count_cancel = 0;

	spin_unlock_irqrestore(&locomokbd->lock, flags);
}

/*
 * LoCoMo keyboard interrupt handler.
 */
static irqreturn_t locomokbd_interrupt(int irq, void *dev_id)
{
	struct locomokbd *locomokbd = dev_id;
	u16 r;

	r = locomo_readl(locomokbd->base + LOCOMO_KIC);
	if ((r & 0x0001) == 0)
		return IRQ_HANDLED;

	locomo_writel(r & ~0x0100, locomokbd->base + LOCOMO_KIC); /* Ack */

	/** wait chattering delay **/
	udelay(100);

	locomokbd_scankeyboard(locomokbd);
	return IRQ_HANDLED;
}

/*
 * LoCoMo timer checking for released keys
 */
static void locomokbd_timer_callback(unsigned long data)
{
	struct locomokbd *locomokbd = (struct locomokbd *) data;

	locomokbd_scankeyboard(locomokbd);
}

static int locomokbd_open(struct input_dev *dev)
{
	struct locomokbd *locomokbd = input_get_drvdata(dev);
	u16 r;
	
	r = locomo_readl(locomokbd->base + LOCOMO_KIC) | 0x0010;
	locomo_writel(r, locomokbd->base + LOCOMO_KIC);
	return 0;
}

static void locomokbd_close(struct input_dev *dev)
{
	struct locomokbd *locomokbd = input_get_drvdata(dev);
	u16 r;
	
	r = locomo_readl(locomokbd->base + LOCOMO_KIC) & ~0x0010;
	locomo_writel(r, locomokbd->base + LOCOMO_KIC);
}

static int locomokbd_probe(struct locomo_dev *dev)
{
	struct locomokbd *locomokbd;
	struct input_dev *input_dev;
	int i, err;

	locomokbd = kzalloc(sizeof(struct locomokbd), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!locomokbd || !input_dev) {
		err = -ENOMEM;
		goto err_free_mem;
	}

	/* try and claim memory region */
	if (!request_mem_region((unsigned long) dev->mapbase,
				dev->length,
				LOCOMO_DRIVER_NAME(dev))) {
		err = -EBUSY;
		printk(KERN_ERR "locomokbd: Can't acquire access to io memory for keyboard\n");
		goto err_free_mem;
	}

	locomo_set_drvdata(dev, locomokbd);

	locomokbd->base = (unsigned long) dev->mapbase;

	spin_lock_init(&locomokbd->lock);

	init_timer(&locomokbd->timer);
	locomokbd->timer.function = locomokbd_timer_callback;
	locomokbd->timer.data = (unsigned long) locomokbd;

	locomokbd->suspend_jiffies = jiffies;

	locomokbd->input = input_dev;
	strcpy(locomokbd->phys, "locomokbd/input0");

	input_dev->name = "LoCoMo keyboard";
	input_dev->phys = locomokbd->phys;
	input_dev->id.bustype = BUS_HOST;
	input_dev->id.vendor = 0x0001;
	input_dev->id.product = 0x0001;
	input_dev->id.version = 0x0100;
	input_dev->open = locomokbd_open;
	input_dev->close = locomokbd_close;
	input_dev->dev.parent = &dev->dev;

	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) |
				BIT_MASK(EV_PWR);
	input_dev->keycode = locomokbd->keycode;
	input_dev->keycodesize = sizeof(locomokbd_keycode[0]);
	input_dev->keycodemax = ARRAY_SIZE(locomokbd_keycode);

	input_set_drvdata(input_dev, locomokbd);

	memcpy(locomokbd->keycode, locomokbd_keycode, sizeof(locomokbd->keycode));
	for (i = 0; i < LOCOMOKBD_NUMKEYS; i++)
		set_bit(locomokbd->keycode[i], input_dev->keybit);
	clear_bit(0, input_dev->keybit);

	/* attempt to get the interrupt */
	err = request_irq(dev->irq[0], locomokbd_interrupt, 0, "locomokbd", locomokbd);
	if (err) {
		printk(KERN_ERR "locomokbd: Can't get irq for keyboard\n");
		goto err_release_region;
	}

	err = input_register_device(locomokbd->input);
	if (err)
		goto err_free_irq;

	return 0;

 err_free_irq:
	free_irq(dev->irq[0], locomokbd);
 err_release_region:
	release_mem_region((unsigned long) dev->mapbase, dev->length);
	locomo_set_drvdata(dev, NULL);
 err_free_mem:
	input_free_device(input_dev);
	kfree(locomokbd);

	return err;
}

static int locomokbd_remove(struct locomo_dev *dev)
{
	struct locomokbd *locomokbd = locomo_get_drvdata(dev);

	free_irq(dev->irq[0], locomokbd);

	del_timer_sync(&locomokbd->timer);

	input_unregister_device(locomokbd->input);
	locomo_set_drvdata(dev, NULL);

	release_mem_region((unsigned long) dev->mapbase, dev->length);

	kfree(locomokbd);

	return 0;
}

static struct locomo_driver keyboard_driver = {
	.drv = {
		.name = "locomokbd"
	},
	.devid	= LOCOMO_DEVID_KEYBOARD,
	.probe	= locomokbd_probe,
	.remove	= locomokbd_remove,
};

static int __init locomokbd_init(void)
{
	return locomo_driver_register(&keyboard_driver);
}

static void __exit locomokbd_exit(void)
{
	locomo_driver_unregister(&keyboard_driver);
}

module_init(locomokbd_init);
module_exit(locomokbd_exit);
Commit	Line	Data
1da177e4	1	/*
e6cdd156 HD	2	* LoCoMo keyboard driver for Linux-based ARM PDAs:
	3	* - SHARP Zaurus Collie (SL-5500)
	4	* - SHARP Zaurus Poodle (SL-5600)
1da177e4	5	*
e6cdd156	6	* Copyright (c) 2005 John Lenz
1da177e4	7	* Based on from xtkbd.c
e6cdd156 HD	8	*
e6cdd156 HD	9	*
1da177e4 LT	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	23	*
	24	*/
	25
1da177e4 LT	26	#include <linux/slab.h>
	27	#include <linux/module.h>
	28	#include <linux/init.h>
	29	#include <linux/input.h>
	30	#include <linux/delay.h>
	31	#include <linux/device.h>
	32	#include <linux/interrupt.h>
	33	#include <linux/ioport.h>
	34
	35	#include <asm/hardware/locomo.h>
	36	#include <asm/irq.h>
	37
	38	MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
	39	MODULE_DESCRIPTION("LoCoMo keyboard driver");
	40	MODULE_LICENSE("GPL");
	41
d083e906	42	#define LOCOMOKBD_NUMKEYS 128
1da177e4 LT	43
	44	#define KEY_ACTIVITY KEY_F16
	45	#define KEY_CONTACT KEY_F18
	46	#define KEY_CENTER KEY_F15
	47
e6cdd156	48	static const unsigned char
78f50c24	49	locomokbd_keycode[LOCOMOKBD_NUMKEYS] = {
1da177e4 LT	50	0, KEY_ESC, KEY_ACTIVITY, 0, 0, 0, 0, 0, 0, 0, /* 0 - 9 */
	51	0, 0, 0, 0, 0, 0, 0, KEY_MENU, KEY_HOME, KEY_CONTACT, /* 10 - 19 */
	52	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 20 - 29 */
	53	0, 0, 0, KEY_CENTER, 0, KEY_MAIL, 0, 0, 0, 0, /* 30 - 39 */
	54	0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_RIGHT, /* 40 - 49 */
	55	KEY_UP, KEY_LEFT, 0, 0, KEY_P, 0, KEY_O, KEY_I, KEY_Y, KEY_T, /* 50 - 59 */
	56	KEY_E, KEY_W, 0, 0, 0, 0, KEY_DOWN, KEY_ENTER, 0, 0, /* 60 - 69 */
	57	KEY_BACKSPACE, 0, KEY_L, KEY_U, KEY_H, KEY_R, KEY_D, KEY_Q, 0, 0, /* 70 - 79 */
	58	0, 0, 0, 0, 0, 0, KEY_ENTER, KEY_RIGHTSHIFT, KEY_K, KEY_J, /* 80 - 89 */
	59	KEY_G, KEY_F, KEY_X, KEY_S, 0, 0, 0, 0, 0, 0, /* 90 - 99 */
	60	0, 0, KEY_DOT, 0, KEY_COMMA, KEY_N, KEY_B, KEY_C, KEY_Z, KEY_A, /* 100 - 109 */
	61	KEY_LEFTSHIFT, KEY_TAB, KEY_LEFTCTRL, 0, 0, 0, 0, 0, 0, 0, /* 110 - 119 */
d083e906	62	KEY_M, KEY_SPACE, KEY_V, KEY_APOSTROPHE, KEY_SLASH, 0, 0, 0 /* 120 - 128 */
1da177e4 LT	63	};
	64
	65	#define KB_ROWS 16
	66	#define KB_COLS 8
	67	#define KB_ROWMASK(r) (1 << (r))
	68	#define SCANCODE(c,r) ( ((c)<<4) + (r) + 1 )
1da177e4 LT	69
	70	#define KB_DELAY 8
	71	#define SCAN_INTERVAL (HZ/10)
1da177e4 LT	72
	73	struct locomokbd {
	74	unsigned char keycode[LOCOMOKBD_NUMKEYS];
438c9da5	75	struct input_dev *input;
1da177e4 LT	76	char phys[32];
1da177e4 LT	77
1da177e4 LT	78	unsigned long base;
1da177e4 LT	79	spinlock_t lock;
d083e906	80
1da177e4	81	struct timer_list timer;
e6cdd156 HD	82	unsigned long suspend_jiffies;
e6cdd156 HD	83	unsigned int count_cancel;
1da177e4 LT	84	};
	85
	86	/* helper functions for reading the keyboard matrix */
	87	static inline void locomokbd_charge_all(unsigned long membase)
	88	{
	89	locomo_writel(0x00FF, membase + LOCOMO_KSC);
	90	}
	91
	92	static inline void locomokbd_activate_all(unsigned long membase)
	93	{
	94	unsigned long r;
d083e906	95
1da177e4 LT	96	locomo_writel(0, membase + LOCOMO_KSC);
	97	r = locomo_readl(membase + LOCOMO_KIC);
	98	r &= 0xFEFF;
	99	locomo_writel(r, membase + LOCOMO_KIC);
	100	}
	101
	102	static inline void locomokbd_activate_col(unsigned long membase, int col)
	103	{
	104	unsigned short nset;
	105	unsigned short nbset;
	106
	107	nset = 0xFF & ~(1 << col);
	108	nbset = (nset << 8) + nset;
	109	locomo_writel(nbset, membase + LOCOMO_KSC);
	110	}
	111
	112	static inline void locomokbd_reset_col(unsigned long membase, int col)
	113	{
	114	unsigned short nbset;
	115
	116	nbset = ((0xFF & ~(1 << col)) << 8) + 0xFF;
	117	locomo_writel(nbset, membase + LOCOMO_KSC);
	118	}
	119
	120	/*
	121	* The LoCoMo keyboard only generates interrupts when a key is pressed.
	122	* So when a key is pressed, we enable a timer. This timer scans the
	123	* keyboard, and this is how we detect when the key is released.
	124	*/
	125
	126	/* Scan the hardware keyboard and push any changes up through the input layer */
7d12e780	127	static void locomokbd_scankeyboard(struct locomokbd *locomokbd)
1da177e4	128	{
e6cdd156	129	unsigned int row, col, rowd;
1da177e4 LT	130	unsigned long flags;
	131	unsigned int num_pressed;
	132	unsigned long membase = locomokbd->base;
	133
	134	spin_lock_irqsave(&locomokbd->lock, flags);
	135
1da177e4 LT	136	locomokbd_charge_all(membase);
	137
	138	num_pressed = 0;
	139	for (col = 0; col < KB_COLS; col++) {
	140
	141	locomokbd_activate_col(membase, col);
	142	udelay(KB_DELAY);
d083e906	143
1da177e4	144	rowd = ~locomo_readl(membase + LOCOMO_KIB);
d083e906	145	for (row = 0; row < KB_ROWS; row++) {
e6cdd156 HD	146	unsigned int scancode, pressed, key;
e6cdd156 HD	147
1da177e4	148	scancode = SCANCODE(col, row);
e6cdd156 HD	149	pressed = rowd & KB_ROWMASK(row);
	150	key = locomokbd->keycode[scancode];
	151
	152	input_report_key(locomokbd->input, key, pressed);
	153	if (likely(!pressed))
	154	continue;
	155
	156	num_pressed++;
	157
	158	/* The "Cancel/ESC" key is labeled "On/Off" on
	159	* Collie and Poodle and should suspend the device
	160	* if it was pressed for more than a second. */
	161	if (unlikely(key == KEY_ESC)) {
	162	if (!time_after(jiffies,
	163	locomokbd->suspend_jiffies + HZ))
	164	continue;
	165	if (locomokbd->count_cancel++
	166	!= (HZ/SCAN_INTERVAL + 1))
	167	continue;
	168	input_event(locomokbd->input, EV_PWR,
	169	KEY_SUSPEND, 1);
	170	locomokbd->suspend_jiffies = jiffies;
	171	} else
	172	locomokbd->count_cancel = 0;
1da177e4 LT	173	}
	174	locomokbd_reset_col(membase, col);
	175	}
	176	locomokbd_activate_all(membase);
	177
438c9da5	178	input_sync(locomokbd->input);
1da177e4 LT	179
	180	/* if any keys are pressed, enable the timer */
	181	if (num_pressed)
	182	mod_timer(&locomokbd->timer, jiffies + SCAN_INTERVAL);
e6cdd156 HD	183	else
e6cdd156 HD	184	locomokbd->count_cancel = 0;
1da177e4 LT	185
	186	spin_unlock_irqrestore(&locomokbd->lock, flags);
	187	}
	188
d083e906	189	/*
1da177e4 LT	190	* LoCoMo keyboard interrupt handler.
1da177e4 LT	191	*/
7d12e780	192	static irqreturn_t locomokbd_interrupt(int irq, void *dev_id)
1da177e4 LT	193	{
1da177e4 LT	194	struct locomokbd *locomokbd = dev_id;
da8065ac EM	195	u16 r;
	196
	197	r = locomo_readl(locomokbd->base + LOCOMO_KIC);
	198	if ((r & 0x0001) == 0)
	199	return IRQ_HANDLED;
	200
	201	locomo_writel(r & ~0x0100, locomokbd->base + LOCOMO_KIC); /* Ack */
	202
1da177e4 LT	203	/ wait chattering delay /
	204	udelay(100);
	205
7d12e780	206	locomokbd_scankeyboard(locomokbd);
1da177e4 LT	207	return IRQ_HANDLED;
	208	}
	209
	210	/*
	211	* LoCoMo timer checking for released keys
	212	*/
	213	static void locomokbd_timer_callback(unsigned long data)
	214	{
	215	struct locomokbd locomokbd = (struct locomokbd ) data;
e6cdd156	216
36bd262b	217	locomokbd_scankeyboard(locomokbd);
1da177e4 LT	218	}
1da177e4 LT	219
da8065ac EM	220	static int locomokbd_open(struct input_dev *dev)
	221	{
	222	struct locomokbd *locomokbd = input_get_drvdata(dev);
	223	u16 r;
	224
	225	r = locomo_readl(locomokbd->base + LOCOMO_KIC) \| 0x0010;
	226	locomo_writel(r, locomokbd->base + LOCOMO_KIC);
	227	return 0;
	228	}
	229
	230	static void locomokbd_close(struct input_dev *dev)
	231	{
	232	struct locomokbd *locomokbd = input_get_drvdata(dev);
	233	u16 r;
	234
	235	r = locomo_readl(locomokbd->base + LOCOMO_KIC) & ~0x0010;
	236	locomo_writel(r, locomokbd->base + LOCOMO_KIC);
	237	}
	238
5298cc4c	239	static int locomokbd_probe(struct locomo_dev *dev)
1da177e4 LT	240	{
1da177e4 LT	241	struct locomokbd *locomokbd;
438c9da5	242	struct input_dev *input_dev;
2b03b60e	243	int i, err;
1da177e4	244
438c9da5 DT	245	locomokbd = kzalloc(sizeof(struct locomokbd), GFP_KERNEL);
	246	input_dev = input_allocate_device();
	247	if (!locomokbd \|\| !input_dev) {
2b03b60e DT	248	err = -ENOMEM;
2b03b60e DT	249	goto err_free_mem;
438c9da5	250	}
1da177e4 LT	251
1da177e4 LT	252	/* try and claim memory region */
d083e906 DT	253	if (!request_mem_region((unsigned long) dev->mapbase,
d083e906 DT	254	dev->length,
1da177e4	255	LOCOMO_DRIVER_NAME(dev))) {
2b03b60e	256	err = -EBUSY;
1da177e4	257	printk(KERN_ERR "locomokbd: Can't acquire access to io memory for keyboard\n");
2b03b60e	258	goto err_free_mem;
1da177e4 LT	259	}
1da177e4 LT	260
1da177e4 LT	261	locomo_set_drvdata(dev, locomokbd);
	262
	263	locomokbd->base = (unsigned long) dev->mapbase;
	264
	265	spin_lock_init(&locomokbd->lock);
	266
	267	init_timer(&locomokbd->timer);
	268	locomokbd->timer.function = locomokbd_timer_callback;
	269	locomokbd->timer.data = (unsigned long) locomokbd;
	270
e6cdd156 HD	271	locomokbd->suspend_jiffies = jiffies;
e6cdd156 HD	272
438c9da5 DT	273	locomokbd->input = input_dev;
	274	strcpy(locomokbd->phys, "locomokbd/input0");
	275
	276	input_dev->name = "LoCoMo keyboard";
	277	input_dev->phys = locomokbd->phys;
d7a767dd	278	input_dev->id.bustype = BUS_HOST;
438c9da5 DT	279	input_dev->id.vendor = 0x0001;
	280	input_dev->id.product = 0x0001;
	281	input_dev->id.version = 0x0100;
da8065ac EM	282	input_dev->open = locomokbd_open;
da8065ac EM	283	input_dev->close = locomokbd_close;
469ba4df	284	input_dev->dev.parent = &dev->dev;
d083e906	285
e6cdd156 HD	286	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_REP) \|
e6cdd156 HD	287	BIT_MASK(EV_PWR);
438c9da5	288	input_dev->keycode = locomokbd->keycode;
e6cdd156	289	input_dev->keycodesize = sizeof(locomokbd_keycode[0]);
438c9da5	290	input_dev->keycodemax = ARRAY_SIZE(locomokbd_keycode);
1da177e4	291
da8065ac EM	292	input_set_drvdata(input_dev, locomokbd);
da8065ac EM	293
1da177e4 LT	294	memcpy(locomokbd->keycode, locomokbd_keycode, sizeof(locomokbd->keycode));
1da177e4 LT	295	for (i = 0; i < LOCOMOKBD_NUMKEYS; i++)
438c9da5 DT	296	set_bit(locomokbd->keycode[i], input_dev->keybit);
438c9da5 DT	297	clear_bit(0, input_dev->keybit);
1da177e4 LT	298
1da177e4 LT	299	/* attempt to get the interrupt */
2b03b60e DT	300	err = request_irq(dev->irq[0], locomokbd_interrupt, 0, "locomokbd", locomokbd);
2b03b60e DT	301	if (err) {
1da177e4	302	printk(KERN_ERR "locomokbd: Can't get irq for keyboard\n");
2b03b60e	303	goto err_release_region;
1da177e4 LT	304	}
1da177e4 LT	305
2b03b60e DT	306	err = input_register_device(locomokbd->input);
	307	if (err)
	308	goto err_free_irq;
1da177e4 LT	309
	310	return 0;
	311
2b03b60e DT	312	err_free_irq:
	313	free_irq(dev->irq[0], locomokbd);
	314	err_release_region:
1da177e4 LT	315	release_mem_region((unsigned long) dev->mapbase, dev->length);
1da177e4 LT	316	locomo_set_drvdata(dev, NULL);
2b03b60e	317	err_free_mem:
438c9da5	318	input_free_device(input_dev);
1da177e4 LT	319	kfree(locomokbd);
1da177e4 LT	320
2b03b60e	321	return err;
1da177e4 LT	322	}
1da177e4 LT	323
e2619cf7	324	static int locomokbd_remove(struct locomo_dev *dev)
1da177e4 LT	325	{
1da177e4 LT	326	struct locomokbd *locomokbd = locomo_get_drvdata(dev);
d083e906	327
1da177e4 LT	328	free_irq(dev->irq[0], locomokbd);
	329
	330	del_timer_sync(&locomokbd->timer);
d083e906	331
438c9da5	332	input_unregister_device(locomokbd->input);
1da177e4 LT	333	locomo_set_drvdata(dev, NULL);
	334
	335	release_mem_region((unsigned long) dev->mapbase, dev->length);
	336
	337	kfree(locomokbd);
	338
	339	return 0;
	340	}
	341
	342	static struct locomo_driver keyboard_driver = {
	343	.drv = {
	344	.name = "locomokbd"
	345	},
	346	.devid = LOCOMO_DEVID_KEYBOARD,
	347	.probe = locomokbd_probe,
1cb0aa88	348	.remove = locomokbd_remove,
1da177e4 LT	349	};
	350
	351	static int __init locomokbd_init(void)
	352	{
	353	return locomo_driver_register(&keyboard_driver);
	354	}
	355
	356	static void __exit locomokbd_exit(void)
	357	{
	358	locomo_driver_unregister(&keyboard_driver);
	359	}
	360
	361	module_init(locomokbd_init);
	362	module_exit(locomokbd_exit);