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
  25 #include <linux/slab.h>
  26 #include <linux/module.h>
  27 #include <linux/input.h>
  28 #include <linux/serio.h>
  29
  30 #define DRIVER_DESC     "Newton keyboard driver"
  31
  32 MODULE_AUTHOR("Justin Cormack <j.cormack@doc.ic.ac.uk>");
  33 MODULE_DESCRIPTION(DRIVER_DESC);
  34 MODULE_LICENSE("GPL");
  35
  36 #define NKBD_KEY        0x7f
  37 #define NKBD_PRESS      0x80
  38
  39 static unsigned char nkbd_keycode[128] = {
  40         KEY_A, KEY_S, KEY_D, KEY_F, KEY_H, KEY_G, KEY_Z, KEY_X,
  41         KEY_C, KEY_V, 0, KEY_B, KEY_Q, KEY_W, KEY_E, KEY_R,
  42         KEY_Y, KEY_T, KEY_1, KEY_2, KEY_3, KEY_4, KEY_6, KEY_5,
  43         KEY_EQUAL, KEY_9, KEY_7, KEY_MINUS, KEY_8, KEY_0, KEY_RIGHTBRACE, KEY_O,
  44         KEY_U, KEY_LEFTBRACE, KEY_I, KEY_P, KEY_ENTER, KEY_L, KEY_J, KEY_APOSTROPHE,
  45         KEY_K, KEY_SEMICOLON, KEY_BACKSLASH, KEY_COMMA, KEY_SLASH, KEY_N, KEY_M, KEY_DOT,
  46         KEY_TAB, KEY_SPACE, KEY_GRAVE, KEY_DELETE, 0, 0, 0, KEY_LEFTMETA,
  47         KEY_LEFTSHIFT, KEY_CAPSLOCK, KEY_LEFTALT, KEY_LEFTCTRL, KEY_RIGHTSHIFT, 0, 0, 0,
  48         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  49         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  50         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  51         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  52         KEY_LEFT, KEY_RIGHT, KEY_DOWN, KEY_UP, 0
  53 };
  54
  55 struct nkbd {
  56         unsigned char keycode[128];
  57         struct input_dev *dev;
  58         struct serio *serio;
  59         char phys[32];
  60 };
  61
  62 static irqreturn_t nkbd_interrupt(struct serio *serio,
  63                 unsigned char data, unsigned int flags)
  64 {
  65         struct nkbd *nkbd = serio_get_drvdata(serio);
  66
  67         /* invalid scan codes are probably the init sequence, so we ignore them */
  68         if (nkbd->keycode[data & NKBD_KEY]) {
  69                 input_report_key(nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS);
  70                 input_sync(nkbd->dev);
  71         }
  72
  73         else if (data == 0xe7) /* end of init sequence */
  74                 printk(KERN_INFO "input: %s on %s\n", nkbd->dev->name, serio->phys);
  75         return IRQ_HANDLED;
  76
  77 }
  78
  79 static int nkbd_connect(struct serio *serio, struct serio_driver *drv)
  80 {
  81         struct nkbd *nkbd;
  82         struct input_dev *input_dev;
  83         int err = -ENOMEM;
  84         int i;
  85
  86         nkbd = kzalloc(sizeof(struct nkbd), GFP_KERNEL);
  87         input_dev = input_allocate_device();
  88         if (!nkbd || !input_dev)
  89                 goto fail1;
  90
  91         nkbd->serio = serio;
  92         nkbd->dev = input_dev;
  93         snprintf(nkbd->phys, sizeof(nkbd->phys), "%s/input0", serio->phys);
  94         memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode));
  95
  96         input_dev->name = "Newton Keyboard";
  97         input_dev->phys = nkbd->phys;
  98         input_dev->id.bustype = BUS_RS232;
  99         input_dev->id.vendor = SERIO_NEWTON;
 100         input_dev->id.product = 0x0001;
 101         input_dev->id.version = 0x0100;
 102         input_dev->dev.parent = &serio->dev;
 103
 104         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
 105         input_dev->keycode = nkbd->keycode;
 106         input_dev->keycodesize = sizeof(unsigned char);
 107         input_dev->keycodemax = ARRAY_SIZE(nkbd_keycode);
 108         for (i = 0; i < 128; i++)
 109                 set_bit(nkbd->keycode[i], input_dev->keybit);
 110         clear_bit(0, input_dev->keybit);
 111
 112         serio_set_drvdata(serio, nkbd);
 113
 114         err = serio_open(serio, drv);
 115         if (err)
 116                 goto fail2;
 117
 118         err = input_register_device(nkbd->dev);
 119         if (err)
 120                 goto fail3;
 121
 122         return 0;
 123
 124  fail3: serio_close(serio);
 125  fail2: serio_set_drvdata(serio, NULL);
 126  fail1: input_free_device(input_dev);
 127         kfree(nkbd);
 128         return err;
 129 }
 130
 131 static void nkbd_disconnect(struct serio *serio)
 132 {
 133         struct nkbd *nkbd = serio_get_drvdata(serio);
 134
 135         serio_close(serio);
 136         serio_set_drvdata(serio, NULL);
 137         input_unregister_device(nkbd->dev);
 138         kfree(nkbd);
 139 }
 140
 141 static const struct serio_device_id nkbd_serio_ids[] = {
 142         {
 143                 .type   = SERIO_RS232,
 144                 .proto  = SERIO_NEWTON,
 145                 .id     = SERIO_ANY,
 146                 .extra  = SERIO_ANY,
 147         },
 148         { 0 }
 149 };
 150
 151 MODULE_DEVICE_TABLE(serio, nkbd_serio_ids);
 152
 153 static struct serio_driver nkbd_drv = {
 154         .driver         = {
 155                 .name   = "newtonkbd",
 156         },
 157         .description    = DRIVER_DESC,
 158         .id_table       = nkbd_serio_ids,
 159         .interrupt      = nkbd_interrupt,
 160         .connect        = nkbd_connect,
 161         .disconnect     = nkbd_disconnect,
 162 };
 163
 164 module_serio_driver(nkbd_drv);