// SPDX-License-Identifier: GPL-2.0-or-later/* *  Copyright (c) 1999-2001 Vojtech Pavlik */ /* * XT keyboard driver for Linux */ #include <linux/slab.h>#include <linux/module.h>#include <linux/input.h>#include <linux/serio.h> #define DRIVER_DESC	"XT keyboard driver" MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");MODULE_DESCRIPTION(DRIVER_DESC);MODULE_LICENSE("GPL"); #define XTKBD_EMUL0	0xe0#define XTKBD_EMUL1	0xe1#define XTKBD_KEY	0x7f#define XTKBD_RELEASE	0x80 static unsigned char xtkbd_keycode[256] = {	  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,	 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,	 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,	 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,	 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,	 80, 81, 82, 83,  0,  0,  0, 87, 88,  0,  0,  0,  0,  0,  0,  0,	  0,  0,  0,  0,  0, 87, 88,  0,  0,  0,  0,110,111,103,108,105,	106}; struct xtkbd {	unsigned char keycode[256];	struct input_dev *dev;	struct serio *serio;	char phys[32];}; static irqreturn_t xtkbd_interrupt(struct serio *serio,	unsigned char data, unsigned int flags){	struct xtkbd *xtkbd = serio_get_drvdata(serio); 	switch (data) {		case XTKBD_EMUL0:		case XTKBD_EMUL1:			break;		default: 			if (xtkbd->keycode[data & XTKBD_KEY]) {				input_report_key(xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE));				input_sync(xtkbd->dev);			} else {				printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n",					data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed");			}	}	return IRQ_HANDLED;} static int xtkbd_connect(struct serio *serio, struct serio_driver *drv){	struct xtkbd *xtkbd;	struct input_dev *input_dev;	int err = -ENOMEM;	int i; 	xtkbd = kmalloc_obj(*xtkbd);	input_dev = input_allocate_device();	if (!xtkbd || !input_dev)		goto fail1; 	xtkbd->serio = serio;	xtkbd->dev = input_dev;	snprintf(xtkbd->phys, sizeof(xtkbd->phys), "%s/input0", serio->phys);	memcpy(xtkbd->keycode, xtkbd_keycode, sizeof(xtkbd->keycode)); 	input_dev->name = "XT Keyboard";	input_dev->phys = xtkbd->phys;	input_dev->id.bustype = BUS_XTKBD;	input_dev->id.vendor  = 0x0001;	input_dev->id.product = 0x0001;	input_dev->id.version = 0x0100;	input_dev->dev.parent = &serio->dev; 	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);	input_dev->keycode = xtkbd->keycode;	input_dev->keycodesize = sizeof(unsigned char);	input_dev->keycodemax = ARRAY_SIZE(xtkbd_keycode); 	for (i = 0; i < 255; i++)		set_bit(xtkbd->keycode[i], input_dev->keybit);	clear_bit(0, input_dev->keybit); 	serio_set_drvdata(serio, xtkbd); 	err = serio_open(serio, drv);	if (err)		goto fail2; 	err = input_register_device(xtkbd->dev);	if (err)		goto fail3; 	return 0;  fail3:	serio_close(serio); fail2:	serio_set_drvdata(serio, NULL); fail1:	input_free_device(input_dev);	kfree(xtkbd);	return err;} static void xtkbd_disconnect(struct serio *serio){	struct xtkbd *xtkbd = serio_get_drvdata(serio); 	serio_close(serio);	serio_set_drvdata(serio, NULL);	input_unregister_device(xtkbd->dev);	kfree(xtkbd);} static const struct serio_device_id xtkbd_serio_ids[] = {	{		.type	= SERIO_XT,		.proto	= SERIO_ANY,		.id	= SERIO_ANY,		.extra	= SERIO_ANY,	},	{ 0 }}; MODULE_DEVICE_TABLE(serio, xtkbd_serio_ids); static struct serio_driver xtkbd_drv = {	.driver		= {		.name	= "xtkbd",	},	.description	= DRIVER_DESC,	.id_table	= xtkbd_serio_ids,	.interrupt	= xtkbd_interrupt,	.connect	= xtkbd_connect,	.disconnect	= xtkbd_disconnect,}; module_serio_driver(xtkbd_drv);