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/init.h>
  33 #include <linux/serio.h>
  34
  35 #define DRIVER_DESC     "Newton keyboard driver"
  36
  37 MODULE_AUTHOR("Justin Cormack <j.cormack@doc.ic.ac.uk>");
  38 MODULE_DESCRIPTION(DRIVER_DESC);
  39 MODULE_LICENSE("GPL");
  40
  41 #define NKBD_KEY        0x7f
  42 #define NKBD_PRESS      0x80
  43
  44 static unsigned char nkbd_keycode[128] = {
  45         KEY_A, KEY_S, KEY_D, KEY_F, KEY_H, KEY_G, KEY_Z, KEY_X,
  46         KEY_C, KEY_V, 0, KEY_B, KEY_Q, KEY_W, KEY_E, KEY_R,
  47         KEY_Y, KEY_T, KEY_1, KEY_2, KEY_3, KEY_4, KEY_6, KEY_5,
  48         KEY_EQUAL, KEY_9, KEY_7, KEY_MINUS, KEY_8, KEY_0, KEY_RIGHTBRACE, KEY_O,
  49         KEY_U, KEY_LEFTBRACE, KEY_I, KEY_P, KEY_ENTER, KEY_L, KEY_J, KEY_APOSTROPHE,
  50         KEY_K, KEY_SEMICOLON, KEY_BACKSLASH, KEY_COMMA, KEY_SLASH, KEY_N, KEY_M, KEY_DOT,
  51         KEY_TAB, KEY_SPACE, KEY_GRAVE, KEY_DELETE, 0, 0, 0, KEY_LEFTMETA,
  52         KEY_LEFTSHIFT, KEY_CAPSLOCK, KEY_LEFTALT, KEY_LEFTCTRL, KEY_RIGHTSHIFT, 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, 0, 0, 0, 0, 0,
  56         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  57         KEY_LEFT, KEY_RIGHT, KEY_DOWN, KEY_UP, 0
  58 };
  59
  60 struct nkbd {
  61         unsigned char keycode[128];
  62         struct input_dev *dev;
  63         struct serio *serio;
  64         char phys[32];
  65 };
  66
  67 static irqreturn_t nkbd_interrupt(struct serio *serio,
  68                 unsigned char data, unsigned int flags, struct pt_regs *regs)
  69 {
  70         struct nkbd *nkbd = serio_get_drvdata(serio);
  71
  72         /* invalid scan codes are probably the init sequence, so we ignore them */
  73         if (nkbd->keycode[data & NKBD_KEY]) {
  74                 input_regs(nkbd->dev, regs);
  75                 input_report_key(nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS);
  76                 input_sync(nkbd->dev);
  77         }
  78
  79         else if (data == 0xe7) /* end of init sequence */
  80                 printk(KERN_INFO "input: %s on %s\n", nkbd->dev->name, serio->phys);
  81         return IRQ_HANDLED;
  82
  83 }
  84
  85 static int nkbd_connect(struct serio *serio, struct serio_driver *drv)
  86 {
  87         struct nkbd *nkbd;
  88         struct input_dev *input_dev;
  89         int err = -ENOMEM;
  90         int i;
  91
  92         nkbd = kzalloc(sizeof(struct nkbd), GFP_KERNEL);
  93         input_dev = input_allocate_device();
  94         if (!nkbd || !input_dev)
  95                 goto fail;
  96
  97         nkbd->serio = serio;
  98         nkbd->dev = input_dev;
  99         snprintf(nkbd->phys, sizeof(nkbd->phys), "%s/input0", serio->phys);
 100         memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode));
 101
 102         input_dev->name = "Newton Keyboard";
 103         input_dev->phys = nkbd->phys;
 104         input_dev->id.bustype = BUS_RS232;
 105         input_dev->id.vendor = SERIO_NEWTON;
 106         input_dev->id.product = 0x0001;
 107         input_dev->id.version = 0x0100;
 108         input_dev->cdev.dev = &serio->dev;
 109         input_dev->private = nkbd;
 110
 111         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
 112         input_dev->keycode = nkbd->keycode;
 113         input_dev->keycodesize = sizeof(unsigned char);
 114         input_dev->keycodemax = ARRAY_SIZE(nkbd_keycode);
 115         for (i = 0; i < 128; i++)
 116                 set_bit(nkbd->keycode[i], input_dev->keybit);
 117         clear_bit(0, input_dev->keybit);
 118
 119         serio_set_drvdata(serio, nkbd);
 120
 121         err = serio_open(serio, drv);
 122         if (err)
 123                 goto fail;
 124
 125         input_register_device(nkbd->dev);
 126         return 0;
 127
 128  fail:  serio_set_drvdata(serio, NULL);
 129         input_free_device(input_dev);
 130         kfree(nkbd);
 131         return err;
 132 }
 133
 134 static void nkbd_disconnect(struct serio *serio)
 135 {
 136         struct nkbd *nkbd = serio_get_drvdata(serio);
 137
 138         serio_close(serio);
 139         serio_set_drvdata(serio, NULL);
 140         input_unregister_device(nkbd->dev);
 141         kfree(nkbd);
 142 }
 143
 144 static struct serio_device_id nkbd_serio_ids[] = {
 145         {
 146                 .type   = SERIO_RS232,
 147                 .proto  = SERIO_NEWTON,
 148                 .id     = SERIO_ANY,
 149                 .extra  = SERIO_ANY,
 150         },
 151         { 0 }
 152 };
 153
 154 MODULE_DEVICE_TABLE(serio, nkbd_serio_ids);
 155
 156 static struct serio_driver nkbd_drv = {
 157         .driver         = {
 158                 .name   = "newtonkbd",
 159         },
 160         .description    = DRIVER_DESC,
 161         .id_table       = nkbd_serio_ids,
 162         .interrupt      = nkbd_interrupt,
 163         .connect        = nkbd_connect,
 164         .disconnect     = nkbd_disconnect,
 165 };
 166
 167 static int __init nkbd_init(void)
 168 {
 169         serio_register_driver(&nkbd_drv);
 170         return 0;
 171 }
 172
 173 static void __exit nkbd_exit(void)
 174 {
 175         serio_unregister_driver(&nkbd_drv);
 176 }
 177
 178 module_init(nkbd_init);
 179 module_exit(nkbd_exit);