116 lines
2.9 KiB
C
116 lines
2.9 KiB
C
/*
|
|
* Acorn RiscPC mouse driver for Linux/ARM
|
|
*
|
|
* Copyright (c) 2000-2002 Vojtech Pavlik
|
|
* Copyright (C) 1996-2002 Russell King
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation.
|
|
*
|
|
* This handles the Acorn RiscPCs mouse. We basically have a couple of
|
|
* hardware registers that track the sensor count for the X-Y movement and
|
|
* another register holding the button state. On every VSYNC interrupt we read
|
|
* the complete state and then work out if something has changed.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/init.h>
|
|
#include <linux/input.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <mach/hardware.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/hardware/iomd.h>
|
|
|
|
MODULE_AUTHOR("Vojtech Pavlik, Russell King");
|
|
MODULE_DESCRIPTION("Acorn RiscPC mouse driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static short rpcmouse_lastx, rpcmouse_lasty;
|
|
static struct input_dev *rpcmouse_dev;
|
|
|
|
static irqreturn_t rpcmouse_irq(int irq, void *dev_id)
|
|
{
|
|
struct input_dev *dev = dev_id;
|
|
short x, y, dx, dy, b;
|
|
|
|
x = (short) iomd_readl(IOMD_MOUSEX);
|
|
y = (short) iomd_readl(IOMD_MOUSEY);
|
|
b = (short) (__raw_readl(IOMEM(0xe0310000)) ^ 0x70);
|
|
|
|
dx = x - rpcmouse_lastx;
|
|
dy = y - rpcmouse_lasty;
|
|
|
|
rpcmouse_lastx = x;
|
|
rpcmouse_lasty = y;
|
|
|
|
input_report_rel(dev, REL_X, dx);
|
|
input_report_rel(dev, REL_Y, -dy);
|
|
|
|
input_report_key(dev, BTN_LEFT, b & 0x40);
|
|
input_report_key(dev, BTN_MIDDLE, b & 0x20);
|
|
input_report_key(dev, BTN_RIGHT, b & 0x10);
|
|
|
|
input_sync(dev);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
|
|
static int __init rpcmouse_init(void)
|
|
{
|
|
int err;
|
|
|
|
rpcmouse_dev = input_allocate_device();
|
|
if (!rpcmouse_dev)
|
|
return -ENOMEM;
|
|
|
|
rpcmouse_dev->name = "Acorn RiscPC Mouse";
|
|
rpcmouse_dev->phys = "rpcmouse/input0";
|
|
rpcmouse_dev->id.bustype = BUS_HOST;
|
|
rpcmouse_dev->id.vendor = 0x0005;
|
|
rpcmouse_dev->id.product = 0x0001;
|
|
rpcmouse_dev->id.version = 0x0100;
|
|
|
|
rpcmouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
|
|
rpcmouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
|
|
BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
|
|
rpcmouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
|
|
|
|
rpcmouse_lastx = (short) iomd_readl(IOMD_MOUSEX);
|
|
rpcmouse_lasty = (short) iomd_readl(IOMD_MOUSEY);
|
|
|
|
if (request_irq(IRQ_VSYNCPULSE, rpcmouse_irq, IRQF_SHARED, "rpcmouse", rpcmouse_dev)) {
|
|
printk(KERN_ERR "rpcmouse: unable to allocate VSYNC interrupt\n");
|
|
err = -EBUSY;
|
|
goto err_free_dev;
|
|
}
|
|
|
|
err = input_register_device(rpcmouse_dev);
|
|
if (err)
|
|
goto err_free_irq;
|
|
|
|
return 0;
|
|
|
|
err_free_irq:
|
|
free_irq(IRQ_VSYNCPULSE, rpcmouse_dev);
|
|
err_free_dev:
|
|
input_free_device(rpcmouse_dev);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __exit rpcmouse_exit(void)
|
|
{
|
|
free_irq(IRQ_VSYNCPULSE, rpcmouse_dev);
|
|
input_unregister_device(rpcmouse_dev);
|
|
}
|
|
|
|
module_init(rpcmouse_init);
|
|
module_exit(rpcmouse_exit);
|