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