[mirror_ubuntu-bionic-kernel.git] / drivers / input / mouse / pc110pad.c

/*
 * $Id: pc110pad.c,v 1.12 2001/09/25 10:12:07 vojtech Exp $
 *
 *  Copyright (c) 2000-2001 Vojtech Pavlik
 *
 *  Based on the work of:
 *	Alan Cox	Robin O'Leary
 */

/*
 * IBM PC110 touchpad driver for Linux
 */

/*
 * 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
 *
 * Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/input.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/pci.h>

#include <asm/io.h>
#include <asm/irq.h>

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("IBM PC110 touchpad driver");
MODULE_LICENSE("GPL");

#define PC110PAD_OFF	0x30
#define PC110PAD_ON	0x38

static int pc110pad_irq = 10;
static int pc110pad_io = 0x15e0;

static struct input_dev *pc110pad_dev;
static int pc110pad_data[3];
static int pc110pad_count;

static irqreturn_t pc110pad_interrupt(int irq, void *ptr)
{
	int value     = inb_p(pc110pad_io);
	int handshake = inb_p(pc110pad_io + 2);

	outb_p(handshake |  1, pc110pad_io + 2);
	outb_p(handshake & ~1, pc110pad_io + 2);
	inb_p(0x64);

	pc110pad_data[pc110pad_count++] = value;

	if (pc110pad_count < 3)
		return IRQ_HANDLED;

	input_report_key(pc110pad_dev, BTN_TOUCH,
		pc110pad_data[0] & 0x01);
	input_report_abs(pc110pad_dev, ABS_X,
		pc110pad_data[1] | ((pc110pad_data[0] << 3) & 0x80) | ((pc110pad_data[0] << 1) & 0x100));
	input_report_abs(pc110pad_dev, ABS_Y,
		pc110pad_data[2] | ((pc110pad_data[0] << 4) & 0x80));
	input_sync(pc110pad_dev);

	pc110pad_count = 0;
	return IRQ_HANDLED;
}

static void pc110pad_close(struct input_dev *dev)
{
	outb(PC110PAD_OFF, pc110pad_io + 2);
}

static int pc110pad_open(struct input_dev *dev)
{
	pc110pad_interrupt(0, NULL);
	pc110pad_interrupt(0, NULL);
	pc110pad_interrupt(0, NULL);
	outb(PC110PAD_ON, pc110pad_io + 2);
	pc110pad_count = 0;

	return 0;
}

/*
 * We try to avoid enabling the hardware if it's not
 * there, but we don't know how to test. But we do know
 * that the PC110 is not a PCI system. So if we find any
 * PCI devices in the machine, we don't have a PC110.
 */
static int __init pc110pad_init(void)
{
	struct pci_dev *dev;
	int err;

	dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
	if (dev) {
		pci_dev_put(dev);
		return -ENOENT;
	}

	if (!request_region(pc110pad_io, 4, "pc110pad")) {
		printk(KERN_ERR "pc110pad: I/O area %#x-%#x in use.\n",
				pc110pad_io, pc110pad_io + 4);
		return -EBUSY;
	}

	outb(PC110PAD_OFF, pc110pad_io + 2);

	if (request_irq(pc110pad_irq, pc110pad_interrupt, 0, "pc110pad", NULL)) {
		printk(KERN_ERR "pc110pad: Unable to get irq %d.\n", pc110pad_irq);
		err = -EBUSY;
		goto err_release_region;
	}

	pc110pad_dev = input_allocate_device();
	if (!pc110pad_dev) {
		printk(KERN_ERR "pc110pad: Not enough memory.\n");
		err = -ENOMEM;
		goto err_free_irq;
	}

	pc110pad_dev->name = "IBM PC110 TouchPad";
	pc110pad_dev->phys = "isa15e0/input0";
	pc110pad_dev->id.bustype = BUS_ISA;
	pc110pad_dev->id.vendor = 0x0003;
	pc110pad_dev->id.product = 0x0001;
	pc110pad_dev->id.version = 0x0100;

	pc110pad_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
	pc110pad_dev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
	pc110pad_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);

	pc110pad_dev->absmax[ABS_X] = 0x1ff;
	pc110pad_dev->absmax[ABS_Y] = 0x0ff;

	pc110pad_dev->open = pc110pad_open;
	pc110pad_dev->close = pc110pad_close;

	err = input_register_device(pc110pad_dev);
	if (err)
		goto err_free_dev;

	return 0;

 err_free_dev:
	input_free_device(pc110pad_dev);
 err_free_irq:
	free_irq(pc110pad_irq, NULL);
 err_release_region:
	release_region(pc110pad_io, 4);

	return err;
}

static void __exit pc110pad_exit(void)
{
	outb(PC110PAD_OFF, pc110pad_io + 2);
	free_irq(pc110pad_irq, NULL);
	input_unregister_device(pc110pad_dev);
	release_region(pc110pad_io, 4);
}

module_init(pc110pad_init);
module_exit(pc110pad_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* $Id: pc110pad.c,v 1.12 2001/09/25 10:12:07 vojtech Exp $
	3	*
	4	* Copyright (c) 2000-2001 Vojtech Pavlik
	5	*
	6	* Based on the work of:
968ac842	7	* Alan Cox Robin O'Leary
1da177e4 LT	8	*/
	9
	10	/*
	11	* IBM PC110 touchpad driver for Linux
	12	*/
	13
	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, write to the Free Software
	27	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	28	*
	29	* Should you need to contact me, the author, you can do so either by
	30	* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
	31	* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
	32	*/
	33
	34	#include <linux/module.h>
	35	#include <linux/kernel.h>
	36	#include <linux/errno.h>
	37	#include <linux/ioport.h>
	38	#include <linux/input.h>
	39	#include <linux/init.h>
	40	#include <linux/interrupt.h>
	41	#include <linux/pci.h>
	42
	43	#include <asm/io.h>
	44	#include <asm/irq.h>
	45
	46	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	47	MODULE_DESCRIPTION("IBM PC110 touchpad driver");
	48	MODULE_LICENSE("GPL");
	49
	50	#define PC110PAD_OFF 0x30
	51	#define PC110PAD_ON 0x38
	52
	53	static int pc110pad_irq = 10;
	54	static int pc110pad_io = 0x15e0;
	55
2e5b636b	56	static struct input_dev *pc110pad_dev;
1da177e4 LT	57	static int pc110pad_data[3];
1da177e4 LT	58	static int pc110pad_count;
1da177e4	59
7d12e780	60	static irqreturn_t pc110pad_interrupt(int irq, void *ptr)
1da177e4 LT	61	{
	62	int value = inb_p(pc110pad_io);
	63	int handshake = inb_p(pc110pad_io + 2);
	64
	65	outb_p(handshake \| 1, pc110pad_io + 2);
	66	outb_p(handshake & ~1, pc110pad_io + 2);
	67	inb_p(0x64);
	68
	69	pc110pad_data[pc110pad_count++] = value;
	70
	71	if (pc110pad_count < 3)
	72	return IRQ_HANDLED;
968ac842	73
2e5b636b	74	input_report_key(pc110pad_dev, BTN_TOUCH,
1da177e4	75	pc110pad_data[0] & 0x01);
2e5b636b	76	input_report_abs(pc110pad_dev, ABS_X,
1da177e4	77	pc110pad_data[1] \| ((pc110pad_data[0] << 3) & 0x80) \| ((pc110pad_data[0] << 1) & 0x100));
2e5b636b	78	input_report_abs(pc110pad_dev, ABS_Y,
1da177e4	79	pc110pad_data[2] \| ((pc110pad_data[0] << 4) & 0x80));
2e5b636b	80	input_sync(pc110pad_dev);
1da177e4 LT	81
	82	pc110pad_count = 0;
	83	return IRQ_HANDLED;
	84	}
	85
	86	static void pc110pad_close(struct input_dev *dev)
	87	{
3108d42d	88	outb(PC110PAD_OFF, pc110pad_io + 2);
1da177e4 LT	89	}
	90
	91	static int pc110pad_open(struct input_dev *dev)
	92	{
7d12e780 DH	93	pc110pad_interrupt(0, NULL);
	94	pc110pad_interrupt(0, NULL);
	95	pc110pad_interrupt(0, NULL);
1da177e4 LT	96	outb(PC110PAD_ON, pc110pad_io + 2);
	97	pc110pad_count = 0;
	98
	99	return 0;
	100	}
	101
	102	/*
	103	* We try to avoid enabling the hardware if it's not
	104	* there, but we don't know how to test. But we do know
	105	* that the PC110 is not a PCI system. So if we find any
	106	* PCI devices in the machine, we don't have a PC110.
	107	*/
	108	static int __init pc110pad_init(void)
	109	{
	110	struct pci_dev *dev;
72155615	111	int err;
1da177e4 LT	112
	113	dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
	114	if (dev) {
	115	pci_dev_put(dev);
	116	return -ENOENT;
	117	}
	118
	119	if (!request_region(pc110pad_io, 4, "pc110pad")) {
	120	printk(KERN_ERR "pc110pad: I/O area %#x-%#x in use.\n",
	121	pc110pad_io, pc110pad_io + 4);
	122	return -EBUSY;
	123	}
	124
	125	outb(PC110PAD_OFF, pc110pad_io + 2);
	126
2e5b636b	127	if (request_irq(pc110pad_irq, pc110pad_interrupt, 0, "pc110pad", NULL)) {
1da177e4	128	printk(KERN_ERR "pc110pad: Unable to get irq %d.\n", pc110pad_irq);
72155615 DT	129	err = -EBUSY;
72155615 DT	130	goto err_release_region;
1da177e4 LT	131	}
1da177e4 LT	132
72155615 DT	133	pc110pad_dev = input_allocate_device();
72155615 DT	134	if (!pc110pad_dev) {
2e5b636b	135	printk(KERN_ERR "pc110pad: Not enough memory.\n");
72155615 DT	136	err = -ENOMEM;
72155615 DT	137	goto err_free_irq;
2e5b636b	138	}
1da177e4	139
2e5b636b DT	140	pc110pad_dev->name = "IBM PC110 TouchPad";
	141	pc110pad_dev->phys = "isa15e0/input0";
	142	pc110pad_dev->id.bustype = BUS_ISA;
	143	pc110pad_dev->id.vendor = 0x0003;
	144	pc110pad_dev->id.product = 0x0001;
	145	pc110pad_dev->id.version = 0x0100;
968ac842	146
2e5b636b DT	147	pc110pad_dev->evbit[0] = BIT(EV_KEY) \| BIT(EV_ABS);
	148	pc110pad_dev->absbit[0] = BIT(ABS_X) \| BIT(ABS_Y);
	149	pc110pad_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
1da177e4	150
2e5b636b DT	151	pc110pad_dev->absmax[ABS_X] = 0x1ff;
2e5b636b DT	152	pc110pad_dev->absmax[ABS_Y] = 0x0ff;
1da177e4	153
2e5b636b DT	154	pc110pad_dev->open = pc110pad_open;
2e5b636b DT	155	pc110pad_dev->close = pc110pad_close;
1da177e4	156
72155615 DT	157	err = input_register_device(pc110pad_dev);
	158	if (err)
	159	goto err_free_dev;
968ac842	160
1da177e4	161	return 0;
72155615 DT	162
	163	err_free_dev:
	164	input_free_device(pc110pad_dev);
	165	err_free_irq:
	166	free_irq(pc110pad_irq, NULL);
	167	err_release_region:
	168	release_region(pc110pad_io, 4);
	169
	170	return err;
1da177e4	171	}
968ac842	172
1da177e4 LT	173	static void __exit pc110pad_exit(void)
1da177e4 LT	174	{
1da177e4	175	outb(PC110PAD_OFF, pc110pad_io + 2);
1da177e4	176	free_irq(pc110pad_irq, NULL);
2e5b636b	177	input_unregister_device(pc110pad_dev);
1da177e4 LT	178	release_region(pc110pad_io, 4);
	179	}
	180
	181	module_init(pc110pad_init);
	182	module_exit(pc110pad_exit);