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

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (c) 2000-2001 Vojtech Pavlik
 *
 *  Based on the work of:
 *	Alan Cox	Robin O'Leary
 */

/*
 * IBM PC110 touchpad driver for Linux
 */

/*
 */

#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
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4	2	/*
1da177e4 LT	3	* Copyright (c) 2000-2001 Vojtech Pavlik
	4	*
	5	* Based on the work of:
968ac842	6	* Alan Cox Robin O'Leary
1da177e4 LT	7	*/
	8
	9	/*
	10	* IBM PC110 touchpad driver for Linux
	11	*/
	12
	13	/*
1da177e4 LT	14	*/
	15
	16	#include <linux/module.h>
	17	#include <linux/kernel.h>
	18	#include <linux/errno.h>
	19	#include <linux/ioport.h>
	20	#include <linux/input.h>
	21	#include <linux/init.h>
	22	#include <linux/interrupt.h>
	23	#include <linux/pci.h>
41e191e8	24	#include <linux/delay.h>
1da177e4 LT	25
	26	#include <asm/io.h>
	27	#include <asm/irq.h>
	28
	29	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	30	MODULE_DESCRIPTION("IBM PC110 touchpad driver");
	31	MODULE_LICENSE("GPL");
	32
	33	#define PC110PAD_OFF 0x30
	34	#define PC110PAD_ON 0x38
	35
	36	static int pc110pad_irq = 10;
	37	static int pc110pad_io = 0x15e0;
	38
2e5b636b	39	static struct input_dev *pc110pad_dev;
1da177e4 LT	40	static int pc110pad_data[3];
1da177e4 LT	41	static int pc110pad_count;
1da177e4	42
7d12e780	43	static irqreturn_t pc110pad_interrupt(int irq, void *ptr)
1da177e4 LT	44	{
	45	int value = inb_p(pc110pad_io);
	46	int handshake = inb_p(pc110pad_io + 2);
	47
41e191e8 IM	48	outb(handshake \| 1, pc110pad_io + 2);
	49	udelay(2);
	50	outb(handshake & ~1, pc110pad_io + 2);
	51	udelay(2);
1da177e4 LT	52	inb_p(0x64);
	53
	54	pc110pad_data[pc110pad_count++] = value;
	55
	56	if (pc110pad_count < 3)
	57	return IRQ_HANDLED;
968ac842	58
2e5b636b	59	input_report_key(pc110pad_dev, BTN_TOUCH,
1da177e4	60	pc110pad_data[0] & 0x01);
2e5b636b	61	input_report_abs(pc110pad_dev, ABS_X,
1da177e4	62	pc110pad_data[1] \| ((pc110pad_data[0] << 3) & 0x80) \| ((pc110pad_data[0] << 1) & 0x100));
2e5b636b	63	input_report_abs(pc110pad_dev, ABS_Y,
1da177e4	64	pc110pad_data[2] \| ((pc110pad_data[0] << 4) & 0x80));
2e5b636b	65	input_sync(pc110pad_dev);
1da177e4 LT	66
	67	pc110pad_count = 0;
	68	return IRQ_HANDLED;
	69	}
	70
	71	static void pc110pad_close(struct input_dev *dev)
	72	{
3108d42d	73	outb(PC110PAD_OFF, pc110pad_io + 2);
1da177e4 LT	74	}
	75
	76	static int pc110pad_open(struct input_dev *dev)
	77	{
7d12e780 DH	78	pc110pad_interrupt(0, NULL);
	79	pc110pad_interrupt(0, NULL);
	80	pc110pad_interrupt(0, NULL);
1da177e4 LT	81	outb(PC110PAD_ON, pc110pad_io + 2);
	82	pc110pad_count = 0;
	83
	84	return 0;
	85	}
	86
	87	/*
	88	* We try to avoid enabling the hardware if it's not
	89	* there, but we don't know how to test. But we do know
	90	* that the PC110 is not a PCI system. So if we find any
	91	* PCI devices in the machine, we don't have a PC110.
	92	*/
	93	static int __init pc110pad_init(void)
	94	{
72155615	95	int err;
1da177e4	96
b0ee0d3e	97	if (!no_pci_devices())
65a2d225	98	return -ENODEV;
1da177e4 LT	99
	100	if (!request_region(pc110pad_io, 4, "pc110pad")) {
	101	printk(KERN_ERR "pc110pad: I/O area %#x-%#x in use.\n",
	102	pc110pad_io, pc110pad_io + 4);
	103	return -EBUSY;
	104	}
	105
	106	outb(PC110PAD_OFF, pc110pad_io + 2);
	107
2e5b636b	108	if (request_irq(pc110pad_irq, pc110pad_interrupt, 0, "pc110pad", NULL)) {
1da177e4	109	printk(KERN_ERR "pc110pad: Unable to get irq %d.\n", pc110pad_irq);
72155615 DT	110	err = -EBUSY;
72155615 DT	111	goto err_release_region;
1da177e4 LT	112	}
1da177e4 LT	113
72155615 DT	114	pc110pad_dev = input_allocate_device();
72155615 DT	115	if (!pc110pad_dev) {
2e5b636b	116	printk(KERN_ERR "pc110pad: Not enough memory.\n");
72155615 DT	117	err = -ENOMEM;
72155615 DT	118	goto err_free_irq;
2e5b636b	119	}
1da177e4	120
2e5b636b DT	121	pc110pad_dev->name = "IBM PC110 TouchPad";
	122	pc110pad_dev->phys = "isa15e0/input0";
	123	pc110pad_dev->id.bustype = BUS_ISA;
	124	pc110pad_dev->id.vendor = 0x0003;
	125	pc110pad_dev->id.product = 0x0001;
	126	pc110pad_dev->id.version = 0x0100;
968ac842	127
7b19ada2 JS	128	pc110pad_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
	129	pc110pad_dev->absbit[0] = BIT_MASK(ABS_X) \| BIT_MASK(ABS_Y);
	130	pc110pad_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1da177e4	131
987a6c02 DM	132	input_abs_set_max(pc110pad_dev, ABS_X, 0x1ff);
987a6c02 DM	133	input_abs_set_max(pc110pad_dev, ABS_Y, 0x0ff);
1da177e4	134
2e5b636b DT	135	pc110pad_dev->open = pc110pad_open;
2e5b636b DT	136	pc110pad_dev->close = pc110pad_close;
1da177e4	137
72155615 DT	138	err = input_register_device(pc110pad_dev);
	139	if (err)
	140	goto err_free_dev;
968ac842	141
1da177e4	142	return 0;
72155615 DT	143
	144	err_free_dev:
	145	input_free_device(pc110pad_dev);
	146	err_free_irq:
	147	free_irq(pc110pad_irq, NULL);
	148	err_release_region:
	149	release_region(pc110pad_io, 4);
	150
	151	return err;
1da177e4	152	}
968ac842	153
1da177e4 LT	154	static void __exit pc110pad_exit(void)
1da177e4 LT	155	{
1da177e4	156	outb(PC110PAD_OFF, pc110pad_io + 2);
1da177e4	157	free_irq(pc110pad_irq, NULL);
2e5b636b	158	input_unregister_device(pc110pad_dev);
1da177e4 LT	159	release_region(pc110pad_io, 4);
	160	}
	161
	162	module_init(pc110pad_init);
	163	module_exit(pc110pad_exit);