[mirror_ubuntu-artful-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/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 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_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(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");
		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);
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>
1da177e4 LT	21	#include <linux/ptrace.h>
	22	#include <linux/interrupt.h>
	23	#include <linux/init.h>
	24	#include <linux/input.h>
	25
	26	#include <asm/hardware.h>
	27	#include <asm/irq.h>
	28	#include <asm/io.h>
	29	#include <asm/hardware/iomd.h>
	30
	31	MODULE_AUTHOR("Vojtech Pavlik, Russell King");
	32	MODULE_DESCRIPTION("Acorn RiscPC mouse driver");
	33	MODULE_LICENSE("GPL");
	34
	35	static short rpcmouse_lastx, rpcmouse_lasty;
2e5b636b	36	static struct input_dev *rpcmouse_dev;
1da177e4	37
7d12e780	38	static irqreturn_t rpcmouse_irq(int irq, void *dev_id)
1da177e4 LT	39	{
	40	struct input_dev *dev = dev_id;
	41	short x, y, dx, dy, b;
	42
	43	x = (short) iomd_readl(IOMD_MOUSEX);
	44	y = (short) iomd_readl(IOMD_MOUSEY);
	45	b = (short) (__raw_readl(0xe0310000) ^ 0x70);
	46
	47	dx = x - rpcmouse_lastx;
968ac842	48	dy = y - rpcmouse_lasty;
1da177e4 LT	49
	50	rpcmouse_lastx = x;
	51	rpcmouse_lasty = y;
	52
1da177e4 LT	53	input_report_rel(dev, REL_X, dx);
	54	input_report_rel(dev, REL_Y, -dy);
	55
	56	input_report_key(dev, BTN_LEFT, b & 0x40);
	57	input_report_key(dev, BTN_MIDDLE, b & 0x20);
	58	input_report_key(dev, BTN_RIGHT, b & 0x10);
	59
	60	input_sync(dev);
	61
	62	return IRQ_HANDLED;
	63	}
	64
2e5b636b	65
1da177e4 LT	66	static int __init rpcmouse_init(void)
1da177e4 LT	67	{
72155615 DT	68	int err;
	69
	70	rpcmouse_dev = input_allocate_device();
	71	if (!rpcmouse_dev)
2e5b636b DT	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");
72155615 DT	90	err = -EBUSY;
72155615 DT	91	goto err_free_dev;
1da177e4 LT	92	}
1da177e4 LT	93
72155615 DT	94	err = input_register_device(rpcmouse_dev);
	95	if (err)
	96	goto err_free_irq;
1da177e4 LT	97
1da177e4 LT	98	return 0;
72155615 DT	99
	100	err_free_irq:
	101	free_irq(IRQ_VSYNCPULSE, rpcmouse_dev);
	102	err_free_dev:
	103	input_free_device(rpcmouse_dev);
	104
	105	return err;
1da177e4 LT	106	}
	107
	108	static void __exit rpcmouse_exit(void)
	109	{
2e5b636b DT	110	free_irq(IRQ_VSYNCPULSE, rpcmouse_dev);
2e5b636b DT	111	input_unregister_device(rpcmouse_dev);
1da177e4 LT	112	}
	113
	114	module_init(rpcmouse_init);
	115	module_exit(rpcmouse_exit);