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Linux/drivers/input/keyboard/xtkbd.c

  1 /*
  2  *  Copyright (c) 1999-2001 Vojtech Pavlik
  3  */
  4 
  5 /*
  6  * XT 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 <vojtech@ucw.cz>, or by paper mail:
 26  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 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     "XT keyboard driver"
 35 
 36 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 37 MODULE_DESCRIPTION(DRIVER_DESC);
 38 MODULE_LICENSE("GPL");
 39 
 40 #define XTKBD_EMUL0     0xe0
 41 #define XTKBD_EMUL1     0xe1
 42 #define XTKBD_KEY       0x7f
 43 #define XTKBD_RELEASE   0x80
 44 
 45 static unsigned char xtkbd_keycode[256] = {
 46           0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
 47          16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
 48          32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
 49          48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
 50          64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
 51          80, 81, 82, 83,  0,  0,  0, 87, 88,  0,  0,  0,  0,  0,  0,  0,
 52           0,  0,  0,  0,  0, 87, 88,  0,  0,  0,  0,110,111,103,108,105,
 53         106
 54 };
 55 
 56 struct xtkbd {
 57         unsigned char keycode[256];
 58         struct input_dev *dev;
 59         struct serio *serio;
 60         char phys[32];
 61 };
 62 
 63 static irqreturn_t xtkbd_interrupt(struct serio *serio,
 64         unsigned char data, unsigned int flags)
 65 {
 66         struct xtkbd *xtkbd = serio_get_drvdata(serio);
 67 
 68         switch (data) {
 69                 case XTKBD_EMUL0:
 70                 case XTKBD_EMUL1:
 71                         break;
 72                 default:
 73 
 74                         if (xtkbd->keycode[data & XTKBD_KEY]) {
 75                                 input_report_key(xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE));
 76                                 input_sync(xtkbd->dev);
 77                         } else {
 78                                 printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n",
 79                                         data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed");
 80                         }
 81         }
 82         return IRQ_HANDLED;
 83 }
 84 
 85 static int xtkbd_connect(struct serio *serio, struct serio_driver *drv)
 86 {
 87         struct xtkbd *xtkbd;
 88         struct input_dev *input_dev;
 89         int err = -ENOMEM;
 90         int i;
 91 
 92         xtkbd = kmalloc(sizeof(struct xtkbd), GFP_KERNEL);
 93         input_dev = input_allocate_device();
 94         if (!xtkbd || !input_dev)
 95                 goto fail1;
 96 
 97         xtkbd->serio = serio;
 98         xtkbd->dev = input_dev;
 99         snprintf(xtkbd->phys, sizeof(xtkbd->phys), "%s/input0", serio->phys);
100         memcpy(xtkbd->keycode, xtkbd_keycode, sizeof(xtkbd->keycode));
101 
102         input_dev->name = "XT Keyboard";
103         input_dev->phys = xtkbd->phys;
104         input_dev->id.bustype = BUS_XTKBD;
105         input_dev->id.vendor  = 0x0001;
106         input_dev->id.product = 0x0001;
107         input_dev->id.version = 0x0100;
108         input_dev->dev.parent = &serio->dev;
109 
110         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
111         input_dev->keycode = xtkbd->keycode;
112         input_dev->keycodesize = sizeof(unsigned char);
113         input_dev->keycodemax = ARRAY_SIZE(xtkbd_keycode);
114 
115         for (i = 0; i < 255; i++)
116                 set_bit(xtkbd->keycode[i], input_dev->keybit);
117         clear_bit(0, input_dev->keybit);
118 
119         serio_set_drvdata(serio, xtkbd);
120 
121         err = serio_open(serio, drv);
122         if (err)
123                 goto fail2;
124 
125         err = input_register_device(xtkbd->dev);
126         if (err)
127                 goto fail3;
128 
129         return 0;
130 
131  fail3: serio_close(serio);
132  fail2: serio_set_drvdata(serio, NULL);
133  fail1: input_free_device(input_dev);
134         kfree(xtkbd);
135         return err;
136 }
137 
138 static void xtkbd_disconnect(struct serio *serio)
139 {
140         struct xtkbd *xtkbd = serio_get_drvdata(serio);
141 
142         serio_close(serio);
143         serio_set_drvdata(serio, NULL);
144         input_unregister_device(xtkbd->dev);
145         kfree(xtkbd);
146 }
147 
148 static struct serio_device_id xtkbd_serio_ids[] = {
149         {
150                 .type   = SERIO_XT,
151                 .proto  = SERIO_ANY,
152                 .id     = SERIO_ANY,
153                 .extra  = SERIO_ANY,
154         },
155         { 0 }
156 };
157 
158 MODULE_DEVICE_TABLE(serio, xtkbd_serio_ids);
159 
160 static struct serio_driver xtkbd_drv = {
161         .driver         = {
162                 .name   = "xtkbd",
163         },
164         .description    = DRIVER_DESC,
165         .id_table       = xtkbd_serio_ids,
166         .interrupt      = xtkbd_interrupt,
167         .connect        = xtkbd_connect,
168         .disconnect     = xtkbd_disconnect,
169 };
170 
171 module_serio_driver(xtkbd_drv);
172 

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