[mirror_ubuntu-bionic-kernel.git] / drivers / input / serio / sa1111ps2.c

/*
 *  linux/drivers/input/serio/sa1111ps2.c
 *
 *  Copyright (C) 2002 Russell King
 *
 * 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.
 */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>

#include <asm/io.h>

#include <asm/hardware/sa1111.h>

#define PS2CR		0x0000
#define PS2STAT		0x0004
#define PS2DATA		0x0008
#define PS2CLKDIV	0x000c
#define PS2PRECNT	0x0010

#define PS2CR_ENA	0x08
#define PS2CR_FKD	0x02
#define PS2CR_FKC	0x01

#define PS2STAT_STP	0x0100
#define PS2STAT_TXE	0x0080
#define PS2STAT_TXB	0x0040
#define PS2STAT_RXF	0x0020
#define PS2STAT_RXB	0x0010
#define PS2STAT_ENA	0x0008
#define PS2STAT_RXP	0x0004
#define PS2STAT_KBD	0x0002
#define PS2STAT_KBC	0x0001

struct ps2if {
	struct serio		*io;
	struct sa1111_dev	*dev;
	void __iomem		*base;
	int			rx_irq;
	int			tx_irq;
	unsigned int		open;
	spinlock_t		lock;
	unsigned int		head;
	unsigned int		tail;
	unsigned char		buf[4];
};

/*
 * Read all bytes waiting in the PS2 port.  There should be
 * at the most one, but we loop for safety.  If there was a
 * framing error, we have to manually clear the status.
 */
static irqreturn_t ps2_rxint(int irq, void *dev_id)
{
	struct ps2if *ps2if = dev_id;
	unsigned int scancode, flag, status;

	status = readl_relaxed(ps2if->base + PS2STAT);
	while (status & PS2STAT_RXF) {
		if (status & PS2STAT_STP)
			writel_relaxed(PS2STAT_STP, ps2if->base + PS2STAT);

		flag = (status & PS2STAT_STP ? SERIO_FRAME : 0) |
		       (status & PS2STAT_RXP ? 0 : SERIO_PARITY);

		scancode = readl_relaxed(ps2if->base + PS2DATA) & 0xff;

		if (hweight8(scancode) & 1)
			flag ^= SERIO_PARITY;

		serio_interrupt(ps2if->io, scancode, flag);

		status = readl_relaxed(ps2if->base + PS2STAT);
        }

        return IRQ_HANDLED;
}

/*
 * Completion of ps2 write
 */
static irqreturn_t ps2_txint(int irq, void *dev_id)
{
	struct ps2if *ps2if = dev_id;
	unsigned int status;

	spin_lock(&ps2if->lock);
	status = readl_relaxed(ps2if->base + PS2STAT);
	if (ps2if->head == ps2if->tail) {
		disable_irq_nosync(irq);
		/* done */
	} else if (status & PS2STAT_TXE) {
		writel_relaxed(ps2if->buf[ps2if->tail], ps2if->base + PS2DATA);
		ps2if->tail = (ps2if->tail + 1) & (sizeof(ps2if->buf) - 1);
	}
	spin_unlock(&ps2if->lock);

	return IRQ_HANDLED;
}

/*
 * Write a byte to the PS2 port.  We have to wait for the
 * port to indicate that the transmitter is empty.
 */
static int ps2_write(struct serio *io, unsigned char val)
{
	struct ps2if *ps2if = io->port_data;
	unsigned long flags;
	unsigned int head;

	spin_lock_irqsave(&ps2if->lock, flags);

	/*
	 * If the TX register is empty, we can go straight out.
	 */
	if (readl_relaxed(ps2if->base + PS2STAT) & PS2STAT_TXE) {
		writel_relaxed(val, ps2if->base + PS2DATA);
	} else {
		if (ps2if->head == ps2if->tail)
			enable_irq(ps2if->tx_irq);
		head = (ps2if->head + 1) & (sizeof(ps2if->buf) - 1);
		if (head != ps2if->tail) {
			ps2if->buf[ps2if->head] = val;
			ps2if->head = head;
		}
	}

	spin_unlock_irqrestore(&ps2if->lock, flags);
	return 0;
}

static int ps2_open(struct serio *io)
{
	struct ps2if *ps2if = io->port_data;
	int ret;

	ret = sa1111_enable_device(ps2if->dev);
	if (ret)
		return ret;

	ret = request_irq(ps2if->rx_irq, ps2_rxint, 0,
			  SA1111_DRIVER_NAME(ps2if->dev), ps2if);
	if (ret) {
		printk(KERN_ERR "sa1111ps2: could not allocate IRQ%d: %d\n",
			ps2if->rx_irq, ret);
		sa1111_disable_device(ps2if->dev);
		return ret;
	}

	ret = request_irq(ps2if->tx_irq, ps2_txint, 0,
			  SA1111_DRIVER_NAME(ps2if->dev), ps2if);
	if (ret) {
		printk(KERN_ERR "sa1111ps2: could not allocate IRQ%d: %d\n",
			ps2if->tx_irq, ret);
		free_irq(ps2if->rx_irq, ps2if);
		sa1111_disable_device(ps2if->dev);
		return ret;
	}

	ps2if->open = 1;

	enable_irq_wake(ps2if->rx_irq);

	writel_relaxed(PS2CR_ENA, ps2if->base + PS2CR);
	return 0;
}

static void ps2_close(struct serio *io)
{
	struct ps2if *ps2if = io->port_data;

	writel_relaxed(0, ps2if->base + PS2CR);

	disable_irq_wake(ps2if->rx_irq);

	ps2if->open = 0;

	free_irq(ps2if->tx_irq, ps2if);
	free_irq(ps2if->rx_irq, ps2if);

	sa1111_disable_device(ps2if->dev);
}

/*
 * Clear the input buffer.
 */
static void ps2_clear_input(struct ps2if *ps2if)
{
	int maxread = 100;

	while (maxread--) {
		if ((readl_relaxed(ps2if->base + PS2DATA) & 0xff) == 0xff)
			break;
	}
}

static unsigned int ps2_test_one(struct ps2if *ps2if,
					   unsigned int mask)
{
	unsigned int val;

	writel_relaxed(PS2CR_ENA | mask, ps2if->base + PS2CR);

	udelay(10);

	val = readl_relaxed(ps2if->base + PS2STAT);
	return val & (PS2STAT_KBC | PS2STAT_KBD);
}

/*
 * Test the keyboard interface.  We basically check to make sure that
 * we can drive each line to the keyboard independently of each other.
 */
static int ps2_test(struct ps2if *ps2if)
{
	unsigned int stat;
	int ret = 0;

	stat = ps2_test_one(ps2if, PS2CR_FKC);
	if (stat != PS2STAT_KBD) {
		printk("PS/2 interface test failed[1]: %02x\n", stat);
		ret = -ENODEV;
	}

	stat = ps2_test_one(ps2if, 0);
	if (stat != (PS2STAT_KBC | PS2STAT_KBD)) {
		printk("PS/2 interface test failed[2]: %02x\n", stat);
		ret = -ENODEV;
	}

	stat = ps2_test_one(ps2if, PS2CR_FKD);
	if (stat != PS2STAT_KBC) {
		printk("PS/2 interface test failed[3]: %02x\n", stat);
		ret = -ENODEV;
	}

	writel_relaxed(0, ps2if->base + PS2CR);

	return ret;
}

/*
 * Add one device to this driver.
 */
static int ps2_probe(struct sa1111_dev *dev)
{
	struct ps2if *ps2if;
	struct serio *serio;
	int ret;

	ps2if = kzalloc(sizeof(struct ps2if), GFP_KERNEL);
	serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
	if (!ps2if || !serio) {
		ret = -ENOMEM;
		goto free;
	}

	serio->id.type		= SERIO_8042;
	serio->write		= ps2_write;
	serio->open		= ps2_open;
	serio->close		= ps2_close;
	strlcpy(serio->name, dev_name(&dev->dev), sizeof(serio->name));
	strlcpy(serio->phys, dev_name(&dev->dev), sizeof(serio->phys));
	serio->port_data	= ps2if;
	serio->dev.parent	= &dev->dev;
	ps2if->io		= serio;
	ps2if->dev		= dev;
	sa1111_set_drvdata(dev, ps2if);

	spin_lock_init(&ps2if->lock);

	ps2if->rx_irq = sa1111_get_irq(dev, 0);
	if (ps2if->rx_irq <= 0) {
		ret = ps2if->rx_irq ? : -ENXIO;
		goto free;
	}

	ps2if->tx_irq = sa1111_get_irq(dev, 1);
	if (ps2if->tx_irq <= 0) {
		ret = ps2if->tx_irq ? : -ENXIO;
		goto free;
	}

	/*
	 * Request the physical region for this PS2 port.
	 */
	if (!request_mem_region(dev->res.start,
				dev->res.end - dev->res.start + 1,
				SA1111_DRIVER_NAME(dev))) {
		ret = -EBUSY;
		goto free;
	}

	/*
	 * Our parent device has already mapped the region.
	 */
	ps2if->base = dev->mapbase;

	sa1111_enable_device(ps2if->dev);

	/* Incoming clock is 8MHz */
	writel_relaxed(0, ps2if->base + PS2CLKDIV);
	writel_relaxed(127, ps2if->base + PS2PRECNT);

	/*
	 * Flush any pending input.
	 */
	ps2_clear_input(ps2if);

	/*
	 * Test the keyboard interface.
	 */
	ret = ps2_test(ps2if);
	if (ret)
		goto out;

	/*
	 * Flush any pending input.
	 */
	ps2_clear_input(ps2if);

	sa1111_disable_device(ps2if->dev);
	serio_register_port(ps2if->io);
	return 0;

 out:
	sa1111_disable_device(ps2if->dev);
	release_mem_region(dev->res.start, resource_size(&dev->res));
 free:
	sa1111_set_drvdata(dev, NULL);
	kfree(ps2if);
	kfree(serio);
	return ret;
}

/*
 * Remove one device from this driver.
 */
static int ps2_remove(struct sa1111_dev *dev)
{
	struct ps2if *ps2if = sa1111_get_drvdata(dev);

	serio_unregister_port(ps2if->io);
	release_mem_region(dev->res.start, resource_size(&dev->res));
	sa1111_set_drvdata(dev, NULL);

	kfree(ps2if);

	return 0;
}

/*
 * Our device driver structure
 */
static struct sa1111_driver ps2_driver = {
	.drv = {
		.name	= "sa1111-ps2",
		.owner	= THIS_MODULE,
	},
	.devid		= SA1111_DEVID_PS2,
	.probe		= ps2_probe,
	.remove		= ps2_remove,
};

static int __init ps2_init(void)
{
	return sa1111_driver_register(&ps2_driver);
}

static void __exit ps2_exit(void)
{
	sa1111_driver_unregister(&ps2_driver);
}

module_init(ps2_init);
module_exit(ps2_exit);

MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
MODULE_DESCRIPTION("SA1111 PS2 controller driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/drivers/input/serio/sa1111ps2.c
	3	*
	4	* Copyright (C) 2002 Russell King
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License.
	9	*/
	10	#include <linux/module.h>
	11	#include <linux/init.h>
	12	#include <linux/input.h>
	13	#include <linux/serio.h>
	14	#include <linux/errno.h>
	15	#include <linux/interrupt.h>
	16	#include <linux/ioport.h>
	17	#include <linux/delay.h>
	18	#include <linux/device.h>
	19	#include <linux/slab.h>
	20	#include <linux/spinlock.h>
	21
	22	#include <asm/io.h>
1da177e4 LT	23
	24	#include <asm/hardware/sa1111.h>
	25
4f8d9cae RK	26	#define PS2CR 0x0000
	27	#define PS2STAT 0x0004
	28	#define PS2DATA 0x0008
	29	#define PS2CLKDIV 0x000c
	30	#define PS2PRECNT 0x0010
	31
	32	#define PS2CR_ENA 0x08
	33	#define PS2CR_FKD 0x02
	34	#define PS2CR_FKC 0x01
	35
	36	#define PS2STAT_STP 0x0100
	37	#define PS2STAT_TXE 0x0080
	38	#define PS2STAT_TXB 0x0040
	39	#define PS2STAT_RXF 0x0020
	40	#define PS2STAT_RXB 0x0010
	41	#define PS2STAT_ENA 0x0008
	42	#define PS2STAT_RXP 0x0004
	43	#define PS2STAT_KBD 0x0002
	44	#define PS2STAT_KBC 0x0001
	45
1da177e4 LT	46	struct ps2if {
	47	struct serio *io;
	48	struct sa1111_dev *dev;
	49	void __iomem *base;
e6c44368 RK	50	int rx_irq;
e6c44368 RK	51	int tx_irq;
1da177e4 LT	52	unsigned int open;
	53	spinlock_t lock;
	54	unsigned int head;
	55	unsigned int tail;
	56	unsigned char buf[4];
	57	};
	58
	59	/*
	60	* Read all bytes waiting in the PS2 port. There should be
	61	* at the most one, but we loop for safety. If there was a
	62	* framing error, we have to manually clear the status.
	63	*/
7d12e780	64	static irqreturn_t ps2_rxint(int irq, void *dev_id)
1da177e4 LT	65	{
	66	struct ps2if *ps2if = dev_id;
	67	unsigned int scancode, flag, status;
	68
a12ded48	69	status = readl_relaxed(ps2if->base + PS2STAT);
1da177e4 LT	70	while (status & PS2STAT_RXF) {
1da177e4 LT	71	if (status & PS2STAT_STP)
a12ded48	72	writel_relaxed(PS2STAT_STP, ps2if->base + PS2STAT);
1da177e4 LT	73
	74	flag = (status & PS2STAT_STP ? SERIO_FRAME : 0) \|
	75	(status & PS2STAT_RXP ? 0 : SERIO_PARITY);
	76
a12ded48	77	scancode = readl_relaxed(ps2if->base + PS2DATA) & 0xff;
1da177e4 LT	78
	79	if (hweight8(scancode) & 1)
	80	flag ^= SERIO_PARITY;
	81
7d12e780	82	serio_interrupt(ps2if->io, scancode, flag);
1da177e4	83
a12ded48	84	status = readl_relaxed(ps2if->base + PS2STAT);
1da177e4 LT	85	}
	86
	87	return IRQ_HANDLED;
	88	}
	89
	90	/*
	91	* Completion of ps2 write
	92	*/
7d12e780	93	static irqreturn_t ps2_txint(int irq, void *dev_id)
1da177e4 LT	94	{
	95	struct ps2if *ps2if = dev_id;
	96	unsigned int status;
	97
	98	spin_lock(&ps2if->lock);
a12ded48	99	status = readl_relaxed(ps2if->base + PS2STAT);
1da177e4	100	if (ps2if->head == ps2if->tail) {
e4bd3e59	101	disable_irq_nosync(irq);
1da177e4 LT	102	/* done */
1da177e4 LT	103	} else if (status & PS2STAT_TXE) {
a12ded48	104	writel_relaxed(ps2if->buf[ps2if->tail], ps2if->base + PS2DATA);
1da177e4 LT	105	ps2if->tail = (ps2if->tail + 1) & (sizeof(ps2if->buf) - 1);
	106	}
	107	spin_unlock(&ps2if->lock);
	108
	109	return IRQ_HANDLED;
	110	}
	111
	112	/*
	113	* Write a byte to the PS2 port. We have to wait for the
	114	* port to indicate that the transmitter is empty.
	115	*/
	116	static int ps2_write(struct serio *io, unsigned char val)
	117	{
	118	struct ps2if *ps2if = io->port_data;
	119	unsigned long flags;
	120	unsigned int head;
	121
	122	spin_lock_irqsave(&ps2if->lock, flags);
	123
	124	/*
	125	* If the TX register is empty, we can go straight out.
	126	*/
a12ded48 RK	127	if (readl_relaxed(ps2if->base + PS2STAT) & PS2STAT_TXE) {
a12ded48 RK	128	writel_relaxed(val, ps2if->base + PS2DATA);
1da177e4 LT	129	} else {
1da177e4 LT	130	if (ps2if->head == ps2if->tail)
e6c44368	131	enable_irq(ps2if->tx_irq);
1da177e4 LT	132	head = (ps2if->head + 1) & (sizeof(ps2if->buf) - 1);
	133	if (head != ps2if->tail) {
	134	ps2if->buf[ps2if->head] = val;
	135	ps2if->head = head;
	136	}
	137	}
	138
	139	spin_unlock_irqrestore(&ps2if->lock, flags);
	140	return 0;
	141	}
	142
	143	static int ps2_open(struct serio *io)
	144	{
	145	struct ps2if *ps2if = io->port_data;
	146	int ret;
	147
ae99ddbc RK	148	ret = sa1111_enable_device(ps2if->dev);
	149	if (ret)
	150	return ret;
1da177e4	151
e6c44368	152	ret = request_irq(ps2if->rx_irq, ps2_rxint, 0,
1da177e4 LT	153	SA1111_DRIVER_NAME(ps2if->dev), ps2if);
	154	if (ret) {
	155	printk(KERN_ERR "sa1111ps2: could not allocate IRQ%d: %d\n",
e6c44368	156	ps2if->rx_irq, ret);
ae99ddbc	157	sa1111_disable_device(ps2if->dev);
1da177e4 LT	158	return ret;
	159	}
	160
e6c44368	161	ret = request_irq(ps2if->tx_irq, ps2_txint, 0,
1da177e4 LT	162	SA1111_DRIVER_NAME(ps2if->dev), ps2if);
	163	if (ret) {
	164	printk(KERN_ERR "sa1111ps2: could not allocate IRQ%d: %d\n",
e6c44368 RK	165	ps2if->tx_irq, ret);
e6c44368 RK	166	free_irq(ps2if->rx_irq, ps2if);
ae99ddbc	167	sa1111_disable_device(ps2if->dev);
1da177e4 LT	168	return ret;
	169	}
	170
	171	ps2if->open = 1;
	172
e6c44368	173	enable_irq_wake(ps2if->rx_irq);
1da177e4	174
a12ded48	175	writel_relaxed(PS2CR_ENA, ps2if->base + PS2CR);
1da177e4 LT	176	return 0;
	177	}
	178
	179	static void ps2_close(struct serio *io)
	180	{
	181	struct ps2if *ps2if = io->port_data;
	182
a12ded48	183	writel_relaxed(0, ps2if->base + PS2CR);
1da177e4	184
e6c44368	185	disable_irq_wake(ps2if->rx_irq);
1da177e4 LT	186
	187	ps2if->open = 0;
	188
e6c44368 RK	189	free_irq(ps2if->tx_irq, ps2if);
e6c44368 RK	190	free_irq(ps2if->rx_irq, ps2if);
1da177e4 LT	191
	192	sa1111_disable_device(ps2if->dev);
	193	}
	194
	195	/*
	196	* Clear the input buffer.
	197	*/
5298cc4c	198	static void ps2_clear_input(struct ps2if *ps2if)
1da177e4 LT	199	{
	200	int maxread = 100;
	201
	202	while (maxread--) {
a12ded48	203	if ((readl_relaxed(ps2if->base + PS2DATA) & 0xff) == 0xff)
1da177e4 LT	204	break;
	205	}
	206	}
	207
5298cc4c	208	static unsigned int ps2_test_one(struct ps2if *ps2if,
010c33cc	209	unsigned int mask)
1da177e4 LT	210	{
	211	unsigned int val;
	212
a12ded48	213	writel_relaxed(PS2CR_ENA \| mask, ps2if->base + PS2CR);
1da177e4	214
361fa055	215	udelay(10);
1da177e4	216
a12ded48	217	val = readl_relaxed(ps2if->base + PS2STAT);
1da177e4 LT	218	return val & (PS2STAT_KBC \| PS2STAT_KBD);
	219	}
	220
	221	/*
	222	* Test the keyboard interface. We basically check to make sure that
	223	* we can drive each line to the keyboard independently of each other.
	224	*/
5298cc4c	225	static int ps2_test(struct ps2if *ps2if)
1da177e4 LT	226	{
	227	unsigned int stat;
	228	int ret = 0;
	229
	230	stat = ps2_test_one(ps2if, PS2CR_FKC);
	231	if (stat != PS2STAT_KBD) {
	232	printk("PS/2 interface test failed[1]: %02x\n", stat);
	233	ret = -ENODEV;
	234	}
	235
	236	stat = ps2_test_one(ps2if, 0);
	237	if (stat != (PS2STAT_KBC \| PS2STAT_KBD)) {
	238	printk("PS/2 interface test failed[2]: %02x\n", stat);
	239	ret = -ENODEV;
	240	}
	241
	242	stat = ps2_test_one(ps2if, PS2CR_FKD);
	243	if (stat != PS2STAT_KBC) {
	244	printk("PS/2 interface test failed[3]: %02x\n", stat);
	245	ret = -ENODEV;
	246	}
	247
a12ded48	248	writel_relaxed(0, ps2if->base + PS2CR);
1da177e4 LT	249
	250	return ret;
	251	}
	252
	253	/*
	254	* Add one device to this driver.
	255	*/
5298cc4c	256	static int ps2_probe(struct sa1111_dev *dev)
1da177e4 LT	257	{
	258	struct ps2if *ps2if;
	259	struct serio *serio;
	260	int ret;
	261
dd00cc48 YP	262	ps2if = kzalloc(sizeof(struct ps2if), GFP_KERNEL);
dd00cc48 YP	263	serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
1da177e4 LT	264	if (!ps2if \|\| !serio) {
	265	ret = -ENOMEM;
	266	goto free;
	267	}
	268
1da177e4 LT	269	serio->id.type = SERIO_8042;
	270	serio->write = ps2_write;
	271	serio->open = ps2_open;
	272	serio->close = ps2_close;
4e8718a1 KS	273	strlcpy(serio->name, dev_name(&dev->dev), sizeof(serio->name));
4e8718a1 KS	274	strlcpy(serio->phys, dev_name(&dev->dev), sizeof(serio->phys));
1da177e4 LT	275	serio->port_data = ps2if;
	276	serio->dev.parent = &dev->dev;
	277	ps2if->io = serio;
	278	ps2if->dev = dev;
	279	sa1111_set_drvdata(dev, ps2if);
	280
	281	spin_lock_init(&ps2if->lock);
	282
e6c44368 RK	283	ps2if->rx_irq = sa1111_get_irq(dev, 0);
	284	if (ps2if->rx_irq <= 0) {
	285	ret = ps2if->rx_irq ? : -ENXIO;
	286	goto free;
	287	}
	288
	289	ps2if->tx_irq = sa1111_get_irq(dev, 1);
	290	if (ps2if->tx_irq <= 0) {
	291	ret = ps2if->tx_irq ? : -ENXIO;
	292	goto free;
	293	}
	294
1da177e4 LT	295	/*
	296	* Request the physical region for this PS2 port.
	297	*/
	298	if (!request_mem_region(dev->res.start,
	299	dev->res.end - dev->res.start + 1,
	300	SA1111_DRIVER_NAME(dev))) {
	301	ret = -EBUSY;
	302	goto free;
	303	}
	304
	305	/*
	306	* Our parent device has already mapped the region.
	307	*/
	308	ps2if->base = dev->mapbase;
	309
	310	sa1111_enable_device(ps2if->dev);
	311
	312	/* Incoming clock is 8MHz */
a12ded48 RK	313	writel_relaxed(0, ps2if->base + PS2CLKDIV);
a12ded48 RK	314	writel_relaxed(127, ps2if->base + PS2PRECNT);
1da177e4 LT	315
	316	/*
	317	* Flush any pending input.
	318	*/
	319	ps2_clear_input(ps2if);
	320
	321	/*
	322	* Test the keyboard interface.
	323	*/
	324	ret = ps2_test(ps2if);
	325	if (ret)
	326	goto out;
	327
	328	/*
	329	* Flush any pending input.
	330	*/
	331	ps2_clear_input(ps2if);
	332
	333	sa1111_disable_device(ps2if->dev);
	334	serio_register_port(ps2if->io);
	335	return 0;
	336
	337	out:
	338	sa1111_disable_device(ps2if->dev);
28f65c11	339	release_mem_region(dev->res.start, resource_size(&dev->res));
1da177e4 LT	340	free:
	341	sa1111_set_drvdata(dev, NULL);
	342	kfree(ps2if);
	343	kfree(serio);
	344	return ret;
	345	}
	346
	347	/*
	348	* Remove one device from this driver.
	349	*/
e2619cf7	350	static int ps2_remove(struct sa1111_dev *dev)
1da177e4 LT	351	{
	352	struct ps2if *ps2if = sa1111_get_drvdata(dev);
	353
	354	serio_unregister_port(ps2if->io);
28f65c11	355	release_mem_region(dev->res.start, resource_size(&dev->res));
1da177e4 LT	356	sa1111_set_drvdata(dev, NULL);
	357
	358	kfree(ps2if);
	359
	360	return 0;
	361	}
	362
	363	/*
	364	* Our device driver structure
	365	*/
	366	static struct sa1111_driver ps2_driver = {
	367	.drv = {
	368	.name = "sa1111-ps2",
1ebcd765	369	.owner = THIS_MODULE,
1da177e4 LT	370	},
	371	.devid = SA1111_DEVID_PS2,
	372	.probe = ps2_probe,
1cb0aa88	373	.remove = ps2_remove,
1da177e4 LT	374	};
	375
	376	static int __init ps2_init(void)
	377	{
	378	return sa1111_driver_register(&ps2_driver);
	379	}
	380
	381	static void __exit ps2_exit(void)
	382	{
	383	sa1111_driver_unregister(&ps2_driver);
	384	}
	385
	386	module_init(ps2_init);
	387	module_exit(ps2_exit);
	388
	389	MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
	390	MODULE_DESCRIPTION("SA1111 PS2 controller driver");
	391	MODULE_LICENSE("GPL");