[mirror_ubuntu-artful-kernel.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
 *
 * 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 <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
	26	*
	27	* Should you need to contact me, the author, you can do so either by
	28	* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
	29	* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
	30	*/
	31
	32	#include <linux/module.h>
	33	#include <linux/kernel.h>
	34	#include <linux/errno.h>
	35	#include <linux/ioport.h>
	36	#include <linux/input.h>
	37	#include <linux/init.h>
	38	#include <linux/interrupt.h>
	39	#include <linux/pci.h>
41e191e8	40	#include <linux/delay.h>
1da177e4 LT	41
	42	#include <asm/io.h>
	43	#include <asm/irq.h>
	44
	45	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	46	MODULE_DESCRIPTION("IBM PC110 touchpad driver");
	47	MODULE_LICENSE("GPL");
	48
	49	#define PC110PAD_OFF 0x30
	50	#define PC110PAD_ON 0x38
	51
	52	static int pc110pad_irq = 10;
	53	static int pc110pad_io = 0x15e0;
	54
2e5b636b	55	static struct input_dev *pc110pad_dev;
1da177e4 LT	56	static int pc110pad_data[3];
1da177e4 LT	57	static int pc110pad_count;
1da177e4	58
7d12e780	59	static irqreturn_t pc110pad_interrupt(int irq, void *ptr)
1da177e4 LT	60	{
	61	int value = inb_p(pc110pad_io);
	62	int handshake = inb_p(pc110pad_io + 2);
	63
41e191e8 IM	64	outb(handshake \| 1, pc110pad_io + 2);
	65	udelay(2);
	66	outb(handshake & ~1, pc110pad_io + 2);
	67	udelay(2);
1da177e4 LT	68	inb_p(0x64);
	69
	70	pc110pad_data[pc110pad_count++] = value;
	71
	72	if (pc110pad_count < 3)
	73	return IRQ_HANDLED;
968ac842	74
2e5b636b	75	input_report_key(pc110pad_dev, BTN_TOUCH,
1da177e4	76	pc110pad_data[0] & 0x01);
2e5b636b	77	input_report_abs(pc110pad_dev, ABS_X,
1da177e4	78	pc110pad_data[1] \| ((pc110pad_data[0] << 3) & 0x80) \| ((pc110pad_data[0] << 1) & 0x100));
2e5b636b	79	input_report_abs(pc110pad_dev, ABS_Y,
1da177e4	80	pc110pad_data[2] \| ((pc110pad_data[0] << 4) & 0x80));
2e5b636b	81	input_sync(pc110pad_dev);
1da177e4 LT	82
	83	pc110pad_count = 0;
	84	return IRQ_HANDLED;
	85	}
	86
	87	static void pc110pad_close(struct input_dev *dev)
	88	{
3108d42d	89	outb(PC110PAD_OFF, pc110pad_io + 2);
1da177e4 LT	90	}
	91
	92	static int pc110pad_open(struct input_dev *dev)
	93	{
7d12e780 DH	94	pc110pad_interrupt(0, NULL);
	95	pc110pad_interrupt(0, NULL);
	96	pc110pad_interrupt(0, NULL);
1da177e4 LT	97	outb(PC110PAD_ON, pc110pad_io + 2);
	98	pc110pad_count = 0;
	99
	100	return 0;
	101	}
	102
	103	/*
	104	* We try to avoid enabling the hardware if it's not
	105	* there, but we don't know how to test. But we do know
	106	* that the PC110 is not a PCI system. So if we find any
	107	* PCI devices in the machine, we don't have a PC110.
	108	*/
	109	static int __init pc110pad_init(void)
	110	{
72155615	111	int err;
1da177e4	112
b0ee0d3e	113	if (!no_pci_devices())
65a2d225	114	return -ENODEV;
1da177e4 LT	115
	116	if (!request_region(pc110pad_io, 4, "pc110pad")) {
	117	printk(KERN_ERR "pc110pad: I/O area %#x-%#x in use.\n",
	118	pc110pad_io, pc110pad_io + 4);
	119	return -EBUSY;
	120	}
	121
	122	outb(PC110PAD_OFF, pc110pad_io + 2);
	123
2e5b636b	124	if (request_irq(pc110pad_irq, pc110pad_interrupt, 0, "pc110pad", NULL)) {
1da177e4	125	printk(KERN_ERR "pc110pad: Unable to get irq %d.\n", pc110pad_irq);
72155615 DT	126	err = -EBUSY;
72155615 DT	127	goto err_release_region;
1da177e4 LT	128	}
1da177e4 LT	129
72155615 DT	130	pc110pad_dev = input_allocate_device();
72155615 DT	131	if (!pc110pad_dev) {
2e5b636b	132	printk(KERN_ERR "pc110pad: Not enough memory.\n");
72155615 DT	133	err = -ENOMEM;
72155615 DT	134	goto err_free_irq;
2e5b636b	135	}
1da177e4	136
2e5b636b DT	137	pc110pad_dev->name = "IBM PC110 TouchPad";
	138	pc110pad_dev->phys = "isa15e0/input0";
	139	pc110pad_dev->id.bustype = BUS_ISA;
	140	pc110pad_dev->id.vendor = 0x0003;
	141	pc110pad_dev->id.product = 0x0001;
	142	pc110pad_dev->id.version = 0x0100;
968ac842	143
7b19ada2 JS	144	pc110pad_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
	145	pc110pad_dev->absbit[0] = BIT_MASK(ABS_X) \| BIT_MASK(ABS_Y);
	146	pc110pad_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1da177e4	147
987a6c02 DM	148	input_abs_set_max(pc110pad_dev, ABS_X, 0x1ff);
987a6c02 DM	149	input_abs_set_max(pc110pad_dev, ABS_Y, 0x0ff);
1da177e4	150
2e5b636b DT	151	pc110pad_dev->open = pc110pad_open;
2e5b636b DT	152	pc110pad_dev->close = pc110pad_close;
1da177e4	153
72155615 DT	154	err = input_register_device(pc110pad_dev);
	155	if (err)
	156	goto err_free_dev;
968ac842	157
1da177e4	158	return 0;
72155615 DT	159
	160	err_free_dev:
	161	input_free_device(pc110pad_dev);
	162	err_free_irq:
	163	free_irq(pc110pad_irq, NULL);
	164	err_release_region:
	165	release_region(pc110pad_io, 4);
	166
	167	return err;
1da177e4	168	}
968ac842	169
1da177e4 LT	170	static void __exit pc110pad_exit(void)
1da177e4 LT	171	{
1da177e4	172	outb(PC110PAD_OFF, pc110pad_io + 2);
1da177e4	173	free_irq(pc110pad_irq, NULL);
2e5b636b	174	input_unregister_device(pc110pad_dev);
1da177e4 LT	175	release_region(pc110pad_io, 4);
	176	}
	177
	178	module_init(pc110pad_init);
	179	module_exit(pc110pad_exit);