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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2000 Justin Cormack
*/
/*
* Newton keyboard driver for Linux
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/serio.h>
#define DRIVER_DESC "Newton keyboard driver"
MODULE_AUTHOR("Justin Cormack <j.cormack@doc.ic.ac.uk>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
#define NKBD_KEY 0x7f
#define NKBD_PRESS 0x80
static unsigned char nkbd_keycode[128] = {
KEY_A, KEY_S, KEY_D, KEY_F, KEY_H, KEY_G, KEY_Z, KEY_X,
KEY_C, KEY_V, 0, KEY_B, KEY_Q, KEY_W, KEY_E, KEY_R,
KEY_Y, KEY_T, KEY_1, KEY_2, KEY_3, KEY_4, KEY_6, KEY_5,
KEY_EQUAL, KEY_9, KEY_7, KEY_MINUS, KEY_8, KEY_0, KEY_RIGHTBRACE, KEY_O,
KEY_U, KEY_LEFTBRACE, KEY_I, KEY_P, KEY_ENTER, KEY_L, KEY_J, KEY_APOSTROPHE,
KEY_K, KEY_SEMICOLON, KEY_BACKSLASH, KEY_COMMA, KEY_SLASH, KEY_N, KEY_M, KEY_DOT,
KEY_TAB, KEY_SPACE, KEY_GRAVE, KEY_DELETE, 0, 0, 0, KEY_LEFTMETA,
KEY_LEFTSHIFT, KEY_CAPSLOCK, KEY_LEFTALT, KEY_LEFTCTRL, KEY_RIGHTSHIFT, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
KEY_LEFT, KEY_RIGHT, KEY_DOWN, KEY_UP, 0
};
struct nkbd {
unsigned char keycode[128];
struct input_dev *dev;
struct serio *serio;
char phys[32];
};
static irqreturn_t nkbd_interrupt(struct serio *serio,
unsigned char data, unsigned int flags)
{
struct nkbd *nkbd = serio_get_drvdata(serio);
/* invalid scan codes are probably the init sequence, so we ignore them */
if (nkbd->keycode[data & NKBD_KEY]) {
input_report_key(nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS);
input_sync(nkbd->dev);
}
else if (data == 0xe7) /* end of init sequence */
printk(KERN_INFO "input: %s on %s\n", nkbd->dev->name, serio->phys);
return IRQ_HANDLED;
}
static int nkbd_connect(struct serio *serio, struct serio_driver *drv)
{
struct nkbd *nkbd;
struct input_dev *input_dev;
int err = -ENOMEM;
int i;
nkbd = kzalloc(sizeof(*nkbd), GFP_KERNEL);
input_dev = input_allocate_device();
if (!nkbd || !input_dev)
goto fail1;
nkbd->serio = serio;
nkbd->dev = input_dev;
snprintf(nkbd->phys, sizeof(nkbd->phys), "%s/input0", serio->phys);
memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode));
input_dev->name = "Newton Keyboard";
input_dev->phys = nkbd->phys;
input_dev->id.bustype = BUS_RS232;
input_dev->id.vendor = SERIO_NEWTON;
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 = nkbd->keycode;
input_dev->keycodesize = sizeof(unsigned char);
input_dev->keycodemax = ARRAY_SIZE(nkbd_keycode);
for (i = 0; i < 128; i++)
set_bit(nkbd->keycode[i], input_dev->keybit);
clear_bit(0, input_dev->keybit);
serio_set_drvdata(serio, nkbd);
err = serio_open(serio, drv);
if (err)
goto fail2;
err = input_register_device(nkbd->dev);
if (err)
goto fail3;
return 0;
fail3: serio_close(serio);
fail2: serio_set_drvdata(serio, NULL);
fail1: input_free_device(input_dev);
kfree(nkbd);
return err;
}
static void nkbd_disconnect(struct serio *serio)
{
struct nkbd *nkbd = serio_get_drvdata(serio);
serio_close(serio);
serio_set_drvdata(serio, NULL);
input_unregister_device(nkbd->dev);
kfree(nkbd);
}
static const struct serio_device_id nkbd_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_NEWTON,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, nkbd_serio_ids);
static struct serio_driver nkbd_drv = {
.driver = {
.name = "newtonkbd",
},
.description = DRIVER_DESC,
.id_table = nkbd_serio_ids,
.interrupt = nkbd_interrupt,
.connect = nkbd_connect,
.disconnect = nkbd_disconnect,
};
module_serio_driver(nkbd_drv);
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