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 static char *nkbd_name = "Newton Keyboard";
  61
  62 struct nkbd {
  63         unsigned char keycode[128];
  64         struct input_dev dev;
  65         struct serio *serio;
  66         char phys[32];
  67 };
  68
  69 static irqreturn_t nkbd_interrupt(struct serio *serio,
  70                 unsigned char data, unsigned int flags, struct pt_regs *regs)
  71 {
  72         struct nkbd *nkbd = serio_get_drvdata(serio);
  73
  74         /* invalid scan codes are probably the init sequence, so we ignore them */
  75         if (nkbd->keycode[data & NKBD_KEY]) {
  76                 input_regs(&nkbd->dev, regs);
  77                 input_report_key(&nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS);
  78                 input_sync(&nkbd->dev);
  79         }
  80
  81         else if (data == 0xe7) /* end of init sequence */
  82                 printk(KERN_INFO "input: %s on %s\n", nkbd_name, serio->phys);
  83         return IRQ_HANDLED;
  84
  85 }
  86
  87 static int nkbd_connect(struct serio *serio, struct serio_driver *drv)
  88 {
  89         struct nkbd *nkbd;
  90         int i;
  91         int err;
  92
  93         if (!(nkbd = kmalloc(sizeof(struct nkbd), GFP_KERNEL)))
  94                 return -ENOMEM;
  95
  96         memset(nkbd, 0, sizeof(struct nkbd));
  97
  98         nkbd->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
  99
 100         nkbd->serio = serio;
 101
 102         init_input_dev(&nkbd->dev);
 103         nkbd->dev.keycode = nkbd->keycode;
 104         nkbd->dev.keycodesize = sizeof(unsigned char);
 105         nkbd->dev.keycodemax = ARRAY_SIZE(nkbd_keycode);
 106         nkbd->dev.private = nkbd;
 107
 108         serio_set_drvdata(serio, nkbd);
 109
 110         err = serio_open(serio, drv);
 111         if (err) {
 112                 serio_set_drvdata(serio, NULL);
 113                 kfree(nkbd);
 114                 return err;
 115         }
 116
 117         memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode));
 118         for (i = 0; i < 128; i++)
 119                 set_bit(nkbd->keycode[i], nkbd->dev.keybit);
 120         clear_bit(0, nkbd->dev.keybit);
 121
 122         sprintf(nkbd->phys, "%s/input0", serio->phys);
 123
 124         nkbd->dev.name = nkbd_name;
 125         nkbd->dev.phys = nkbd->phys;
 126         nkbd->dev.id.bustype = BUS_RS232;
 127         nkbd->dev.id.vendor = SERIO_NEWTON;
 128         nkbd->dev.id.product = 0x0001;
 129         nkbd->dev.id.version = 0x0100;
 130         nkbd->dev.dev = &serio->dev;
 131
 132         input_register_device(&nkbd->dev);
 133
 134         printk(KERN_INFO "input: %s on %s\n", nkbd_name, serio->phys);
 135
 136         return 0;
 137 }
 138
 139 static void nkbd_disconnect(struct serio *serio)
 140 {
 141         struct nkbd *nkbd = serio_get_drvdata(serio);
 142
 143         input_unregister_device(&nkbd->dev);
 144         serio_close(serio);
 145         serio_set_drvdata(serio, NULL);
 146         kfree(nkbd);
 147 }
 148
 149 static struct serio_device_id nkbd_serio_ids[] = {
 150         {
 151                 .type   = SERIO_RS232,
 152                 .proto  = SERIO_NEWTON,
 153                 .id     = SERIO_ANY,
 154                 .extra  = SERIO_ANY,
 155         },
 156         { 0 }
 157 };
 158
 159 MODULE_DEVICE_TABLE(serio, nkbd_serio_ids);
 160
 161 static struct serio_driver nkbd_drv = {
 162         .driver         = {
 163                 .name   = "newtonkbd",
 164         },
 165         .description    = DRIVER_DESC,
 166         .id_table       = nkbd_serio_ids,
 167         .interrupt      = nkbd_interrupt,
 168         .connect        = nkbd_connect,
 169         .disconnect     = nkbd_disconnect,
 170 };
 171
 172 static int __init nkbd_init(void)
 173 {
 174         serio_register_driver(&nkbd_drv);
 175         return 0;
 176 }
 177
 178 static void __exit nkbd_exit(void)
 179 {
 180         serio_unregister_driver(&nkbd_drv);
 181 }
 182
 183 module_init(nkbd_init);
 184 module_exit(nkbd_exit);