// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 1999-2001 Vojtech Pavlik
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*
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* Based on the work of:
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* Teemu Rantanen Derrick Cole
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* Peter Cervasio Christoph Niemann
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* Philip Blundell Russell King
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* Bob Harris
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*/
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/*
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* Inport (ATI XL and Microsoft) busmouse driver for Linux
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*/
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/*
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*/
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#include <linux/module.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/input.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION("Inport (ATI XL and Microsoft) busmouse driver");
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MODULE_LICENSE("GPL");
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#define INPORT_BASE 0x23c
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#define INPORT_EXTENT 4
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#define INPORT_CONTROL_PORT INPORT_BASE + 0
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#define INPORT_DATA_PORT INPORT_BASE + 1
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#define INPORT_SIGNATURE_PORT INPORT_BASE + 2
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#define INPORT_REG_BTNS 0x00
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#define INPORT_REG_X 0x01
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#define INPORT_REG_Y 0x02
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#define INPORT_REG_MODE 0x07
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#define INPORT_RESET 0x80
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#ifdef CONFIG_MOUSE_ATIXL
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#define INPORT_NAME "ATI XL Mouse"
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#define INPORT_VENDOR 0x0002
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#define INPORT_SPEED_30HZ 0x01
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#define INPORT_SPEED_50HZ 0x02
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#define INPORT_SPEED_100HZ 0x03
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#define INPORT_SPEED_200HZ 0x04
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#define INPORT_MODE_BASE INPORT_SPEED_100HZ
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#define INPORT_MODE_IRQ 0x08
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#else
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#define INPORT_NAME "Microsoft InPort Mouse"
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#define INPORT_VENDOR 0x0001
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#define INPORT_MODE_BASE 0x10
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#define INPORT_MODE_IRQ 0x01
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#endif
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#define INPORT_MODE_HOLD 0x20
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#define INPORT_IRQ 5
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static int inport_irq = INPORT_IRQ;
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module_param_hw_named(irq, inport_irq, uint, irq, 0);
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MODULE_PARM_DESC(irq, "IRQ number (5=default)");
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static struct input_dev *inport_dev;
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static irqreturn_t inport_interrupt(int irq, void *dev_id)
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{
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unsigned char buttons;
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outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
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outb(INPORT_MODE_HOLD | INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
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outb(INPORT_REG_X, INPORT_CONTROL_PORT);
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input_report_rel(inport_dev, REL_X, inb(INPORT_DATA_PORT));
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outb(INPORT_REG_Y, INPORT_CONTROL_PORT);
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input_report_rel(inport_dev, REL_Y, inb(INPORT_DATA_PORT));
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outb(INPORT_REG_BTNS, INPORT_CONTROL_PORT);
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buttons = inb(INPORT_DATA_PORT);
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input_report_key(inport_dev, BTN_MIDDLE, buttons & 1);
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input_report_key(inport_dev, BTN_LEFT, buttons & 2);
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input_report_key(inport_dev, BTN_RIGHT, buttons & 4);
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outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
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outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
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input_sync(inport_dev);
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return IRQ_HANDLED;
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}
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static int inport_open(struct input_dev *dev)
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{
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if (request_irq(inport_irq, inport_interrupt, 0, "inport", NULL))
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return -EBUSY;
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outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
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outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
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return 0;
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}
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static void inport_close(struct input_dev *dev)
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{
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outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
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outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
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free_irq(inport_irq, NULL);
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}
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static int __init inport_init(void)
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{
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unsigned char a, b, c;
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int err;
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if (!request_region(INPORT_BASE, INPORT_EXTENT, "inport")) {
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printk(KERN_ERR "inport.c: Can't allocate ports at %#x\n", INPORT_BASE);
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return -EBUSY;
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}
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a = inb(INPORT_SIGNATURE_PORT);
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b = inb(INPORT_SIGNATURE_PORT);
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c = inb(INPORT_SIGNATURE_PORT);
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if (a == b || a != c) {
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printk(KERN_INFO "inport.c: Didn't find InPort mouse at %#x\n", INPORT_BASE);
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err = -ENODEV;
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goto err_release_region;
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}
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inport_dev = input_allocate_device();
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if (!inport_dev) {
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printk(KERN_ERR "inport.c: Not enough memory for input device\n");
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err = -ENOMEM;
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goto err_release_region;
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}
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inport_dev->name = INPORT_NAME;
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inport_dev->phys = "isa023c/input0";
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inport_dev->id.bustype = BUS_ISA;
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inport_dev->id.vendor = INPORT_VENDOR;
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inport_dev->id.product = 0x0001;
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inport_dev->id.version = 0x0100;
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inport_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
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inport_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
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BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
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inport_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
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inport_dev->open = inport_open;
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inport_dev->close = inport_close;
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outb(INPORT_RESET, INPORT_CONTROL_PORT);
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outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
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outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
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err = input_register_device(inport_dev);
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if (err)
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goto err_free_dev;
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return 0;
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err_free_dev:
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input_free_device(inport_dev);
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err_release_region:
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release_region(INPORT_BASE, INPORT_EXTENT);
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return err;
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}
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static void __exit inport_exit(void)
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{
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input_unregister_device(inport_dev);
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release_region(INPORT_BASE, INPORT_EXTENT);
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}
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module_init(inport_init);
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module_exit(inport_exit);
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