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
  36 MODULE_AUTHOR("Justin Cormack <j.cormack@doc.ic.ac.uk>");
  37 MODULE_DESCRIPTION(DRIVER_DESC);
  38 MODULE_LICENSE("GPL");
  39
  40 #define NKBD_KEY        0x7f
  41 #define NKBD_PRESS      0x80
  42
  43 static 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
  59 struct nkbd {
  60         unsigned char keycode[128];
  61         struct input_dev *dev;
  62         struct serio *serio;
  63         char phys[32];
  64 };
  65
  66 static 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
  83 static 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
 135 static 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
 145 static 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
 155 MODULE_DEVICE_TABLE(serio, nkbd_serio_ids);
 156
 157 static 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
 168 module_serio_driver(nkbd_drv);