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Linux/drivers/input/keyboard/stowaway.c

  1 /*
  2  * Stowaway keyboard driver for Linux
  3  */
  4 
  5 /*
  6  *  Copyright (c) 2006 Marek Vasut
  7  *
  8  *  Based on Newton keyboard driver for Linux
  9  *  by Justin Cormack
 10  */
 11 
 12 /*
 13  * This program is free software; you can redistribute it and/or modify
 14  * it under the terms of the GNU General Public License as published by
 15  * the Free Software Foundation; either version 2 of the License, or
 16  * (at your option) any later version.
 17  *
 18  * This program is distributed in the hope that it will be useful,
 19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 21  * GNU General Public License for more details.
 22  *
 23  * You should have received a copy of the GNU General Public License
 24  * along with this program; if not, write to the Free Software
 25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 26  *
 27  * Should you need to contact me, the author, you can do so either by
 28  * e-mail - mail your message to <marek.vasut@gmail.com>, or by paper mail:
 29  * Marek Vasut, Liskovecka 559, Frydek-Mistek, 738 01 Czech Republic
 30  */
 31 
 32 #include <linux/slab.h>
 33 #include <linux/module.h>
 34 #include <linux/input.h>
 35 #include <linux/serio.h>
 36 
 37 #define DRIVER_DESC     "Stowaway keyboard driver"
 38 
 39 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
 40 MODULE_DESCRIPTION(DRIVER_DESC);
 41 MODULE_LICENSE("GPL");
 42 
 43 #define SKBD_KEY_MASK   0x7f
 44 #define SKBD_RELEASE    0x80
 45 
 46 static unsigned char skbd_keycode[128] = {
 47         KEY_1, KEY_2, KEY_3, KEY_Z, KEY_4, KEY_5, KEY_6, KEY_7,
 48         0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_GRAVE,
 49         KEY_X, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_SPACE,
 50         KEY_CAPSLOCK, KEY_TAB, KEY_LEFTCTRL, 0, 0, 0, 0, 0,
 51         0, 0, 0, KEY_LEFTALT, 0, 0, 0, 0,
 52         0, 0, 0, 0, KEY_C, KEY_V, KEY_B, KEY_N,
 53         KEY_MINUS, KEY_EQUAL, KEY_BACKSPACE, KEY_HOME, KEY_8, KEY_9, KEY_0, KEY_ESC,
 54         KEY_LEFTBRACE, KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_END, KEY_U, KEY_I, KEY_O, KEY_P,
 55         KEY_APOSTROPHE, KEY_ENTER, KEY_PAGEUP,0, KEY_J, KEY_K, KEY_L, KEY_SEMICOLON,
 56         KEY_SLASH, KEY_UP, KEY_PAGEDOWN, 0,KEY_M, KEY_COMMA, KEY_DOT, KEY_INSERT,
 57         KEY_DELETE, KEY_LEFT, KEY_DOWN, KEY_RIGHT,  0, 0, 0,
 58         KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0,
 59         0, 0, 0, 0, 0, 0, 0, 0,
 60         0, 0, 0, 0, 0, 0, 0, 0,
 61         0, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7,
 62         KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, 0, 0, 0
 63 };
 64 
 65 struct skbd {
 66         unsigned char keycode[128];
 67         struct input_dev *dev;
 68         struct serio *serio;
 69         char phys[32];
 70 };
 71 
 72 static irqreturn_t skbd_interrupt(struct serio *serio, unsigned char data,
 73                                   unsigned int flags)
 74 {
 75         struct skbd *skbd = serio_get_drvdata(serio);
 76         struct input_dev *dev = skbd->dev;
 77 
 78         if (skbd->keycode[data & SKBD_KEY_MASK]) {
 79                 input_report_key(dev, skbd->keycode[data & SKBD_KEY_MASK],
 80                                  !(data & SKBD_RELEASE));
 81                 input_sync(dev);
 82         }
 83 
 84         return IRQ_HANDLED;
 85 }
 86 
 87 static int skbd_connect(struct serio *serio, struct serio_driver *drv)
 88 {
 89         struct skbd *skbd;
 90         struct input_dev *input_dev;
 91         int err = -ENOMEM;
 92         int i;
 93 
 94         skbd = kzalloc(sizeof(struct skbd), GFP_KERNEL);
 95         input_dev = input_allocate_device();
 96         if (!skbd || !input_dev)
 97                 goto fail1;
 98 
 99         skbd->serio = serio;
100         skbd->dev = input_dev;
101         snprintf(skbd->phys, sizeof(skbd->phys), "%s/input0", serio->phys);
102         memcpy(skbd->keycode, skbd_keycode, sizeof(skbd->keycode));
103 
104         input_dev->name = "Stowaway Keyboard";
105         input_dev->phys = skbd->phys;
106         input_dev->id.bustype = BUS_RS232;
107         input_dev->id.vendor = SERIO_STOWAWAY;
108         input_dev->id.product = 0x0001;
109         input_dev->id.version = 0x0100;
110         input_dev->dev.parent = &serio->dev;
111 
112         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
113         input_dev->keycode = skbd->keycode;
114         input_dev->keycodesize = sizeof(unsigned char);
115         input_dev->keycodemax = ARRAY_SIZE(skbd_keycode);
116         for (i = 0; i < ARRAY_SIZE(skbd_keycode); i++)
117                 set_bit(skbd_keycode[i], input_dev->keybit);
118         clear_bit(0, input_dev->keybit);
119 
120         serio_set_drvdata(serio, skbd);
121 
122         err = serio_open(serio, drv);
123         if (err)
124                 goto fail2;
125 
126         err = input_register_device(skbd->dev);
127         if (err)
128                 goto fail3;
129 
130         return 0;
131 
132  fail3: serio_close(serio);
133  fail2: serio_set_drvdata(serio, NULL);
134  fail1: input_free_device(input_dev);
135         kfree(skbd);
136         return err;
137 }
138 
139 static void skbd_disconnect(struct serio *serio)
140 {
141         struct skbd *skbd = serio_get_drvdata(serio);
142 
143         serio_close(serio);
144         serio_set_drvdata(serio, NULL);
145         input_unregister_device(skbd->dev);
146         kfree(skbd);
147 }
148 
149 static struct serio_device_id skbd_serio_ids[] = {
150         {
151                 .type   = SERIO_RS232,
152                 .proto  = SERIO_STOWAWAY,
153                 .id     = SERIO_ANY,
154                 .extra  = SERIO_ANY,
155         },
156         { 0 }
157 };
158 
159 MODULE_DEVICE_TABLE(serio, skbd_serio_ids);
160 
161 static struct serio_driver skbd_drv = {
162         .driver         = {
163                 .name   = "stowaway",
164         },
165         .description    = DRIVER_DESC,
166         .id_table       = skbd_serio_ids,
167         .interrupt      = skbd_interrupt,
168         .connect        = skbd_connect,
169         .disconnect     = skbd_disconnect,
170 };
171 
172 module_serio_driver(skbd_drv);
173 

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