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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 
 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);
169 

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