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