LXR linux/drivers/input/keyboard/newtonkbd.c

   1/*
   2 *  Copyright (c) 2000 Justin Cormack
   3 */
   4
   5/*
   6 * Newton keyboard driver for Linux
   7 */
   8
   9/*
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License as published by
  12 * the Free Software Foundation; either version 2 of the License, or
  13 * (at your option) any later version.
  14 *
  15 * This program is distributed in the hope that it will be useful,
  16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18 * GNU General Public License for more details.
  19 *
  20 * You should have received a copy of the GNU General Public License
  21 * along with this program; if not, write to the Free Software
  22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23 *
  24 * Should you need to contact me, the author, you can do so either by
  25 * e-mail - mail your message to <j.cormack@doc.ic.ac.uk>, or by paper mail:
  26 * Justin Cormack, 68 Dartmouth Park Road, London NW5 1SN, UK.
  27 */
  28
  29#include <linux/slab.h>
  30#include <linux/module.h>
  31#include <linux/input.h>
  32#include <linux/serio.h>
  33
  34#define DRIVER_DESC     "Newton keyboard driver"
  35
  36MODULE_AUTHOR("Justin Cormack <j.cormack@doc.ic.ac.uk>");
  37MODULE_DESCRIPTION(DRIVER_DESC);
  38MODULE_LICENSE("GPL");
  39
  40#define NKBD_KEY        0x7f
  41#define NKBD_PRESS      0x80
  42
  43static unsigned char nkbd_keycode[128] = {
  44        KEY_A, KEY_S, KEY_D, KEY_F, KEY_H, KEY_G, KEY_Z, KEY_X,
  45        KEY_C, KEY_V, 0, KEY_B, KEY_Q, KEY_W, KEY_E, KEY_R,
  46        KEY_Y, KEY_T, KEY_1, KEY_2, KEY_3, KEY_4, KEY_6, KEY_5,
  47        KEY_EQUAL, KEY_9, KEY_7, KEY_MINUS, KEY_8, KEY_0, KEY_RIGHTBRACE, KEY_O,
  48        KEY_U, KEY_LEFTBRACE, KEY_I, KEY_P, KEY_ENTER, KEY_L, KEY_J, KEY_APOSTROPHE,
  49        KEY_K, KEY_SEMICOLON, KEY_BACKSLASH, KEY_COMMA, KEY_SLASH, KEY_N, KEY_M, KEY_DOT,
  50        KEY_TAB, KEY_SPACE, KEY_GRAVE, KEY_DELETE, 0, 0, 0, KEY_LEFTMETA,
  51        KEY_LEFTSHIFT, KEY_CAPSLOCK, KEY_LEFTALT, KEY_LEFTCTRL, KEY_RIGHTSHIFT, 0, 0, 0,
  52        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  53        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  54        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  55        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  56        KEY_LEFT, KEY_RIGHT, KEY_DOWN, KEY_UP, 0
  57};
  58
  59struct nkbd {
  60        unsigned char keycode[128];
  61        struct input_dev *dev;
  62        struct serio *serio;
  63        char phys[32];
  64};
  65
  66static irqreturn_t nkbd_interrupt(struct serio *serio,
  67                unsigned char data, unsigned int flags)
  68{
  69        struct nkbd *nkbd = serio_get_drvdata(serio);
  70
  71        /* invalid scan codes are probably the init sequence, so we ignore them */
  72        if (nkbd->keycode[data & NKBD_KEY]) {
  73                input_report_key(nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS);
  74                input_sync(nkbd->dev);
  75        }
  76
  77        else if (data == 0xe7) /* end of init sequence */
  78                printk(KERN_INFO "input: %s on %s\n", nkbd->dev->name, serio->phys);
  79        return IRQ_HANDLED;
  80
  81}
  82
  83static int nkbd_connect(struct serio *serio, struct serio_driver *drv)
  84{
  85        struct nkbd *nkbd;
  86        struct input_dev *input_dev;
  87        int err = -ENOMEM;
  88        int i;
  89
  90        nkbd = kzalloc(sizeof(struct nkbd), GFP_KERNEL);
  91        input_dev = input_allocate_device();
  92        if (!nkbd || !input_dev)
  93                goto fail1;
  94
  95        nkbd->serio = serio;
  96        nkbd->dev = input_dev;
  97        snprintf(nkbd->phys, sizeof(nkbd->phys), "%s/input0", serio->phys);
  98        memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode));
  99
 100        input_dev->name = "Newton Keyboard";
 101        input_dev->phys = nkbd->phys;
 102        input_dev->id.bustype = BUS_RS232;
 103        input_dev->id.vendor = SERIO_NEWTON;
 104        input_dev->id.product = 0x0001;
 105        input_dev->id.version = 0x0100;
 106        input_dev->dev.parent = &serio->dev;
 107
 108        input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
 109        input_dev->keycode = nkbd->keycode;
 110        input_dev->keycodesize = sizeof(unsigned char);
 111        input_dev->keycodemax = ARRAY_SIZE(nkbd_keycode);
 112        for (i = 0; i < 128; i++)
 113                set_bit(nkbd->keycode[i], input_dev->keybit);
 114        clear_bit(0, input_dev->keybit);
 115
 116        serio_set_drvdata(serio, nkbd);
 117
 118        err = serio_open(serio, drv);
 119        if (err)
 120                goto fail2;
 121
 122        err = input_register_device(nkbd->dev);
 123        if (err)
 124                goto fail3;
 125
 126        return 0;
 127
 128 fail3: serio_close(serio);
 129 fail2: serio_set_drvdata(serio, NULL);
 130 fail1: input_free_device(input_dev);
 131        kfree(nkbd);
 132        return err;
 133}
 134
 135static void nkbd_disconnect(struct serio *serio)
 136{
 137        struct nkbd *nkbd = serio_get_drvdata(serio);
 138
 139        serio_close(serio);
 140        serio_set_drvdata(serio, NULL);
 141        input_unregister_device(nkbd->dev);
 142        kfree(nkbd);
 143}
 144
 145static const struct serio_device_id nkbd_serio_ids[] = {
 146        {
 147                .type   = SERIO_RS232,
 148                .proto  = SERIO_NEWTON,
 149                .id     = SERIO_ANY,
 150                .extra  = SERIO_ANY,
 151        },
 152        { 0 }
 153};
 154
 155MODULE_DEVICE_TABLE(serio, nkbd_serio_ids);
 156
 157static struct serio_driver nkbd_drv = {
 158        .driver         = {
 159                .name   = "newtonkbd",
 160        },
 161        .description    = DRIVER_DESC,
 162        .id_table       = nkbd_serio_ids,
 163        .interrupt      = nkbd_interrupt,
 164        .connect        = nkbd_connect,
 165        .disconnect     = nkbd_disconnect,
 166};
 167
 168module_serio_driver(nkbd_drv);
 169