[mirror_ubuntu-jammy-kernel.git] / drivers / input / mouse / rpcmouse.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  Acorn RiscPC mouse driver for Linux/ARM
 *
 *  Copyright (c) 2000-2002 Vojtech Pavlik
 *  Copyright (C) 1996-2002 Russell King
 */

/*
 *
 * 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);
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
1da177e4 LT	2	/*
	3	* Acorn RiscPC mouse driver for Linux/ARM
	4	*
	5	* Copyright (c) 2000-2002 Vojtech Pavlik
	6	* Copyright (C) 1996-2002 Russell King
1da177e4 LT	7	*/
	8
	9	/*
1da177e4 LT	10	*
	11	* This handles the Acorn RiscPCs mouse. We basically have a couple of
	12	* hardware registers that track the sensor count for the X-Y movement and
	13	* another register holding the button state. On every VSYNC interrupt we read
	14	* the complete state and then work out if something has changed.
	15	*/
	16
	17	#include <linux/module.h>
1da177e4 LT	18	#include <linux/ptrace.h>
	19	#include <linux/interrupt.h>
	20	#include <linux/init.h>
	21	#include <linux/input.h>
99730225	22	#include <linux/io.h>
1da177e4	23
a09e64fb	24	#include <mach/hardware.h>
1da177e4	25	#include <asm/irq.h>
1da177e4 LT	26	#include <asm/hardware/iomd.h>
	27
	28	MODULE_AUTHOR("Vojtech Pavlik, Russell King");
	29	MODULE_DESCRIPTION("Acorn RiscPC mouse driver");
	30	MODULE_LICENSE("GPL");
	31
	32	static short rpcmouse_lastx, rpcmouse_lasty;
2e5b636b	33	static struct input_dev *rpcmouse_dev;
1da177e4	34
7d12e780	35	static irqreturn_t rpcmouse_irq(int irq, void *dev_id)
1da177e4 LT	36	{
	37	struct input_dev *dev = dev_id;
	38	short x, y, dx, dy, b;
	39
	40	x = (short) iomd_readl(IOMD_MOUSEX);
	41	y = (short) iomd_readl(IOMD_MOUSEY);
fe73f035	42	b = (short) (__raw_readl(IOMEM(0xe0310000)) ^ 0x70);
1da177e4 LT	43
1da177e4 LT	44	dx = x - rpcmouse_lastx;
968ac842	45	dy = y - rpcmouse_lasty;
1da177e4 LT	46
	47	rpcmouse_lastx = x;
	48	rpcmouse_lasty = y;
	49
1da177e4 LT	50	input_report_rel(dev, REL_X, dx);
	51	input_report_rel(dev, REL_Y, -dy);
	52
	53	input_report_key(dev, BTN_LEFT, b & 0x40);
	54	input_report_key(dev, BTN_MIDDLE, b & 0x20);
	55	input_report_key(dev, BTN_RIGHT, b & 0x10);
	56
	57	input_sync(dev);
	58
	59	return IRQ_HANDLED;
	60	}
	61
2e5b636b	62
1da177e4 LT	63	static int __init rpcmouse_init(void)
1da177e4 LT	64	{
72155615 DT	65	int err;
	66
	67	rpcmouse_dev = input_allocate_device();
	68	if (!rpcmouse_dev)
2e5b636b DT	69	return -ENOMEM;
	70
	71	rpcmouse_dev->name = "Acorn RiscPC Mouse";
	72	rpcmouse_dev->phys = "rpcmouse/input0";
	73	rpcmouse_dev->id.bustype = BUS_HOST;
	74	rpcmouse_dev->id.vendor = 0x0005;
	75	rpcmouse_dev->id.product = 0x0001;
	76	rpcmouse_dev->id.version = 0x0100;
	77
7b19ada2 JS	78	rpcmouse_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_REL);
	79	rpcmouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) \|
	80	BIT_MASK(BTN_MIDDLE) \| BIT_MASK(BTN_RIGHT);
	81	rpcmouse_dev->relbit[0] = BIT_MASK(REL_X) \| BIT_MASK(REL_Y);
1da177e4 LT	82
	83	rpcmouse_lastx = (short) iomd_readl(IOMD_MOUSEX);
	84	rpcmouse_lasty = (short) iomd_readl(IOMD_MOUSEY);
	85
dace1453	86	if (request_irq(IRQ_VSYNCPULSE, rpcmouse_irq, IRQF_SHARED, "rpcmouse", rpcmouse_dev)) {
1da177e4	87	printk(KERN_ERR "rpcmouse: unable to allocate VSYNC interrupt\n");
72155615 DT	88	err = -EBUSY;
72155615 DT	89	goto err_free_dev;
1da177e4 LT	90	}
1da177e4 LT	91
72155615 DT	92	err = input_register_device(rpcmouse_dev);
	93	if (err)
	94	goto err_free_irq;
1da177e4 LT	95
1da177e4 LT	96	return 0;
72155615 DT	97
	98	err_free_irq:
	99	free_irq(IRQ_VSYNCPULSE, rpcmouse_dev);
	100	err_free_dev:
	101	input_free_device(rpcmouse_dev);
	102
	103	return err;
1da177e4 LT	104	}
	105
	106	static void __exit rpcmouse_exit(void)
	107	{
2e5b636b DT	108	free_irq(IRQ_VSYNCPULSE, rpcmouse_dev);
2e5b636b DT	109	input_unregister_device(rpcmouse_dev);
1da177e4 LT	110	}
	111
	112	module_init(rpcmouse_init);
	113	module_exit(rpcmouse_exit);