[mirror_ubuntu-eoan-kernel.git] / drivers / input / mouse / rpcmouse.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/sched.h>
#include <linux/ptrace.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/input.h>

#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/io.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 pt_regs *regs)
{
	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(0xe0310000) ^ 0x70);

	dx = x - rpcmouse_lastx;
	dy = y - rpcmouse_lasty;

	rpcmouse_lastx = x;
	rpcmouse_lasty = y;

	input_regs(dev, regs);

	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)
{
	if (!(rpcmouse_dev = input_allocate_device()))
		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(EV_KEY) | BIT(EV_REL);
	rpcmouse_dev->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
	rpcmouse_dev->relbit[0]	= BIT(REL_X) | BIT(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");
		input_free_device(rpcmouse_dev);
		return -EBUSY;
	}

	input_register_device(rpcmouse_dev);

	return 0;
}

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);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Acorn RiscPC mouse driver for Linux/ARM
	3	*
	4	* Copyright (c) 2000-2002 Vojtech Pavlik
	5	* Copyright (C) 1996-2002 Russell King
	6	*
	7	*/
	8
	9	/*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License version 2 as published by
	12	* the Free Software Foundation.
	13	*
	14	* This handles the Acorn RiscPCs mouse. We basically have a couple of
	15	* hardware registers that track the sensor count for the X-Y movement and
	16	* another register holding the button state. On every VSYNC interrupt we read
	17	* the complete state and then work out if something has changed.
	18	*/
	19
	20	#include <linux/module.h>
	21	#include <linux/sched.h>
	22	#include <linux/ptrace.h>
	23	#include <linux/interrupt.h>
	24	#include <linux/init.h>
	25	#include <linux/input.h>
	26
	27	#include <asm/hardware.h>
	28	#include <asm/irq.h>
	29	#include <asm/io.h>
	30	#include <asm/hardware/iomd.h>
	31
	32	MODULE_AUTHOR("Vojtech Pavlik, Russell King");
	33	MODULE_DESCRIPTION("Acorn RiscPC mouse driver");
	34	MODULE_LICENSE("GPL");
	35
	36	static short rpcmouse_lastx, rpcmouse_lasty;
2e5b636b	37	static struct input_dev *rpcmouse_dev;
1da177e4 LT	38
	39	static irqreturn_t rpcmouse_irq(int irq, void dev_id, struct pt_regs regs)
	40	{
	41	struct input_dev *dev = dev_id;
	42	short x, y, dx, dy, b;
	43
	44	x = (short) iomd_readl(IOMD_MOUSEX);
	45	y = (short) iomd_readl(IOMD_MOUSEY);
	46	b = (short) (__raw_readl(0xe0310000) ^ 0x70);
	47
	48	dx = x - rpcmouse_lastx;
968ac842	49	dy = y - rpcmouse_lasty;
1da177e4 LT	50
	51	rpcmouse_lastx = x;
	52	rpcmouse_lasty = y;
	53
	54	input_regs(dev, regs);
	55
	56	input_report_rel(dev, REL_X, dx);
	57	input_report_rel(dev, REL_Y, -dy);
	58
	59	input_report_key(dev, BTN_LEFT, b & 0x40);
	60	input_report_key(dev, BTN_MIDDLE, b & 0x20);
	61	input_report_key(dev, BTN_RIGHT, b & 0x10);
	62
	63	input_sync(dev);
	64
	65	return IRQ_HANDLED;
	66	}
	67
2e5b636b	68
1da177e4 LT	69	static int __init rpcmouse_init(void)
1da177e4 LT	70	{
2e5b636b DT	71	if (!(rpcmouse_dev = input_allocate_device()))
	72	return -ENOMEM;
	73
	74	rpcmouse_dev->name = "Acorn RiscPC Mouse";
	75	rpcmouse_dev->phys = "rpcmouse/input0";
	76	rpcmouse_dev->id.bustype = BUS_HOST;
	77	rpcmouse_dev->id.vendor = 0x0005;
	78	rpcmouse_dev->id.product = 0x0001;
	79	rpcmouse_dev->id.version = 0x0100;
	80
	81	rpcmouse_dev->evbit[0] = BIT(EV_KEY) \| BIT(EV_REL);
	82	rpcmouse_dev->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) \| BIT(BTN_MIDDLE) \| BIT(BTN_RIGHT);
	83	rpcmouse_dev->relbit[0] = BIT(REL_X) \| BIT(REL_Y);
1da177e4 LT	84
	85	rpcmouse_lastx = (short) iomd_readl(IOMD_MOUSEX);
	86	rpcmouse_lasty = (short) iomd_readl(IOMD_MOUSEY);
	87
dace1453	88	if (request_irq(IRQ_VSYNCPULSE, rpcmouse_irq, IRQF_SHARED, "rpcmouse", rpcmouse_dev)) {
1da177e4	89	printk(KERN_ERR "rpcmouse: unable to allocate VSYNC interrupt\n");
2e5b636b DT	90	input_free_device(rpcmouse_dev);
2e5b636b DT	91	return -EBUSY;
1da177e4 LT	92	}
1da177e4 LT	93
2e5b636b	94	input_register_device(rpcmouse_dev);
1da177e4 LT	95
	96	return 0;
	97	}
	98
	99	static void __exit rpcmouse_exit(void)
	100	{
2e5b636b DT	101	free_irq(IRQ_VSYNCPULSE, rpcmouse_dev);
2e5b636b DT	102	input_unregister_device(rpcmouse_dev);
1da177e4 LT	103	}
	104
	105	module_init(rpcmouse_init);
	106	module_exit(rpcmouse_exit);