[linux-block.git] / drivers / input / mouse / pc110pad.c

/*
 *  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
 */

#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 <linux/delay.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(handshake |  1, pc110pad_io + 2);
	udelay(2);
	outb(handshake & ~1, pc110pad_io + 2);
	udelay(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)
{
	int err;

	if (!no_pci_devices())
		return -ENODEV;

	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_MASK(EV_KEY) | BIT_MASK(EV_ABS);
	pc110pad_dev->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
	pc110pad_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);

	input_abs_set_max(pc110pad_dev, ABS_X, 0x1ff);
	input_abs_set_max(pc110pad_dev, 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	1	/*
1da177e4 LT	2	* Copyright (c) 2000-2001 Vojtech Pavlik
	3	*
	4	* Based on the work of:
968ac842	5	* Alan Cox Robin O'Leary
1da177e4 LT	6	*/
	7
	8	/*
	9	* IBM PC110 touchpad driver for Linux
	10	*/
	11
	12	/*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License as published by
	15	* the Free Software Foundation; either version 2 of the License, or
	16	* (at your option) any later version.
	17	*
	18	* This program is distributed in the hope that it will be useful,
	19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	21	* GNU General Public License for more details.
	22	*
	23	* You should have received a copy of the GNU General Public License
	24	* along with this program; if not, write to the Free Software
	25	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1da177e4 LT	26	*/
	27
	28	#include <linux/module.h>
	29	#include <linux/kernel.h>
	30	#include <linux/errno.h>
	31	#include <linux/ioport.h>
	32	#include <linux/input.h>
	33	#include <linux/init.h>
	34	#include <linux/interrupt.h>
	35	#include <linux/pci.h>
41e191e8	36	#include <linux/delay.h>
1da177e4 LT	37
	38	#include <asm/io.h>
	39	#include <asm/irq.h>
	40
	41	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	42	MODULE_DESCRIPTION("IBM PC110 touchpad driver");
	43	MODULE_LICENSE("GPL");
	44
	45	#define PC110PAD_OFF 0x30
	46	#define PC110PAD_ON 0x38
	47
	48	static int pc110pad_irq = 10;
	49	static int pc110pad_io = 0x15e0;
	50
2e5b636b	51	static struct input_dev *pc110pad_dev;
1da177e4 LT	52	static int pc110pad_data[3];
1da177e4 LT	53	static int pc110pad_count;
1da177e4	54
7d12e780	55	static irqreturn_t pc110pad_interrupt(int irq, void *ptr)
1da177e4 LT	56	{
	57	int value = inb_p(pc110pad_io);
	58	int handshake = inb_p(pc110pad_io + 2);
	59
41e191e8 IM	60	outb(handshake \| 1, pc110pad_io + 2);
	61	udelay(2);
	62	outb(handshake & ~1, pc110pad_io + 2);
	63	udelay(2);
1da177e4 LT	64	inb_p(0x64);
	65
	66	pc110pad_data[pc110pad_count++] = value;
	67
	68	if (pc110pad_count < 3)
	69	return IRQ_HANDLED;
968ac842	70
2e5b636b	71	input_report_key(pc110pad_dev, BTN_TOUCH,
1da177e4	72	pc110pad_data[0] & 0x01);
2e5b636b	73	input_report_abs(pc110pad_dev, ABS_X,
1da177e4	74	pc110pad_data[1] \| ((pc110pad_data[0] << 3) & 0x80) \| ((pc110pad_data[0] << 1) & 0x100));
2e5b636b	75	input_report_abs(pc110pad_dev, ABS_Y,
1da177e4	76	pc110pad_data[2] \| ((pc110pad_data[0] << 4) & 0x80));
2e5b636b	77	input_sync(pc110pad_dev);
1da177e4 LT	78
	79	pc110pad_count = 0;
	80	return IRQ_HANDLED;
	81	}
	82
	83	static void pc110pad_close(struct input_dev *dev)
	84	{
3108d42d	85	outb(PC110PAD_OFF, pc110pad_io + 2);
1da177e4 LT	86	}
	87
	88	static int pc110pad_open(struct input_dev *dev)
	89	{
7d12e780 DH	90	pc110pad_interrupt(0, NULL);
	91	pc110pad_interrupt(0, NULL);
	92	pc110pad_interrupt(0, NULL);
1da177e4 LT	93	outb(PC110PAD_ON, pc110pad_io + 2);
	94	pc110pad_count = 0;
	95
	96	return 0;
	97	}
	98
	99	/*
	100	* We try to avoid enabling the hardware if it's not
	101	* there, but we don't know how to test. But we do know
	102	* that the PC110 is not a PCI system. So if we find any
	103	* PCI devices in the machine, we don't have a PC110.
	104	*/
	105	static int __init pc110pad_init(void)
	106	{
72155615	107	int err;
1da177e4	108
b0ee0d3e	109	if (!no_pci_devices())
65a2d225	110	return -ENODEV;
1da177e4 LT	111
	112	if (!request_region(pc110pad_io, 4, "pc110pad")) {
	113	printk(KERN_ERR "pc110pad: I/O area %#x-%#x in use.\n",
	114	pc110pad_io, pc110pad_io + 4);
	115	return -EBUSY;
	116	}
	117
	118	outb(PC110PAD_OFF, pc110pad_io + 2);
	119
2e5b636b	120	if (request_irq(pc110pad_irq, pc110pad_interrupt, 0, "pc110pad", NULL)) {
1da177e4	121	printk(KERN_ERR "pc110pad: Unable to get irq %d.\n", pc110pad_irq);
72155615 DT	122	err = -EBUSY;
72155615 DT	123	goto err_release_region;
1da177e4 LT	124	}
1da177e4 LT	125
72155615 DT	126	pc110pad_dev = input_allocate_device();
72155615 DT	127	if (!pc110pad_dev) {
2e5b636b	128	printk(KERN_ERR "pc110pad: Not enough memory.\n");
72155615 DT	129	err = -ENOMEM;
72155615 DT	130	goto err_free_irq;
2e5b636b	131	}
1da177e4	132
2e5b636b DT	133	pc110pad_dev->name = "IBM PC110 TouchPad";
	134	pc110pad_dev->phys = "isa15e0/input0";
	135	pc110pad_dev->id.bustype = BUS_ISA;
	136	pc110pad_dev->id.vendor = 0x0003;
	137	pc110pad_dev->id.product = 0x0001;
	138	pc110pad_dev->id.version = 0x0100;
968ac842	139
7b19ada2 JS	140	pc110pad_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
	141	pc110pad_dev->absbit[0] = BIT_MASK(ABS_X) \| BIT_MASK(ABS_Y);
	142	pc110pad_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1da177e4	143
987a6c02 DM	144	input_abs_set_max(pc110pad_dev, ABS_X, 0x1ff);
987a6c02 DM	145	input_abs_set_max(pc110pad_dev, ABS_Y, 0x0ff);
1da177e4	146
2e5b636b DT	147	pc110pad_dev->open = pc110pad_open;
2e5b636b DT	148	pc110pad_dev->close = pc110pad_close;
1da177e4	149
72155615 DT	150	err = input_register_device(pc110pad_dev);
	151	if (err)
	152	goto err_free_dev;
968ac842	153
1da177e4	154	return 0;
72155615 DT	155
	156	err_free_dev:
	157	input_free_device(pc110pad_dev);
	158	err_free_irq:
	159	free_irq(pc110pad_irq, NULL);
	160	err_release_region:
	161	release_region(pc110pad_io, 4);
	162
	163	return err;
1da177e4	164	}
968ac842	165
1da177e4 LT	166	static void __exit pc110pad_exit(void)
1da177e4 LT	167	{
1da177e4	168	outb(PC110PAD_OFF, pc110pad_io + 2);
1da177e4	169	free_irq(pc110pad_irq, NULL);
2e5b636b	170	input_unregister_device(pc110pad_dev);
1da177e4 LT	171	release_region(pc110pad_io, 4);
	172	}
	173
	174	module_init(pc110pad_init);
	175	module_exit(pc110pad_exit);