1 /* 2 * $Id: xtkbd.c,v 1.11 2001/09/25 10:12:07 vojtech Exp $ 3 * 4 * Copyright (c) 1999-2001 Vojtech Pavlik 5 */ 6 7 /* 8 * XT keyboard driver for Linux 9 */ 10 11 /* 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 25 * 26 * Should you need to contact me, the author, you can do so either by 27 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 28 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 29 */ 30 31 #include <linux/slab.h> 32 #include <linux/module.h> 33 #include <linux/input.h> 34 #include <linux/init.h> 35 #include <linux/serio.h> 36 37 #define DRIVER_DESC "XT keyboard driver" 38 39 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 40 MODULE_DESCRIPTION(DRIVER_DESC); 41 MODULE_LICENSE("GPL"); 42 43 #define XTKBD_EMUL0 0xe0 44 #define XTKBD_EMUL1 0xe1 45 #define XTKBD_KEY 0x7f 46 #define XTKBD_RELEASE 0x80 47 48 static unsigned char xtkbd_keycode[256] = { 49 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 50 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 51 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 52 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 53 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 54 80, 81, 82, 83, 0, 0, 0, 87, 88, 0, 0, 0, 0, 0, 0, 0, 55 0, 0, 0, 0, 0, 87, 88, 0, 0, 0, 0,110,111,103,108,105, 56 106 57 }; 58 59 struct xtkbd { 60 unsigned char keycode[256]; 61 struct input_dev *dev; 62 struct serio *serio; 63 char phys[32]; 64 }; 65 66 static irqreturn_t xtkbd_interrupt(struct serio *serio, 67 unsigned char data, unsigned int flags, struct pt_regs *regs) 68 { 69 struct xtkbd *xtkbd = serio_get_drvdata(serio); 70 71 switch (data) { 72 case XTKBD_EMUL0: 73 case XTKBD_EMUL1: 74 break; 75 default: 76 77 if (xtkbd->keycode[data & XTKBD_KEY]) { 78 input_regs(xtkbd->dev, regs); 79 input_report_key(xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE)); 80 input_sync(xtkbd->dev); 81 } else { 82 printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n", 83 data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed"); 84 } 85 } 86 return IRQ_HANDLED; 87 } 88 89 static int xtkbd_connect(struct serio *serio, struct serio_driver *drv) 90 { 91 struct xtkbd *xtkbd; 92 struct input_dev *input_dev; 93 int err = -ENOMEM; 94 int i; 95 96 xtkbd = kmalloc(sizeof(struct xtkbd), GFP_KERNEL); 97 input_dev = input_allocate_device(); 98 if (!xtkbd || !input_dev) 99 goto fail; 100 101 xtkbd->serio = serio; 102 xtkbd->dev = input_dev; 103 sprintf(xtkbd->phys, "%s/input0", serio->phys); 104 memcpy(xtkbd->keycode, xtkbd_keycode, sizeof(xtkbd->keycode)); 105 106 input_dev->name = "XT Keyboard"; 107 input_dev->phys = xtkbd->phys; 108 input_dev->id.bustype = BUS_XTKBD; 109 input_dev->id.vendor = 0x0001; 110 input_dev->id.product = 0x0001; 111 input_dev->id.version = 0x0100; 112 input_dev->cdev.dev = &serio->dev; 113 input_dev->private = xtkbd; 114 115 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP); 116 input_dev->keycode = xtkbd->keycode; 117 input_dev->keycodesize = sizeof(unsigned char); 118 input_dev->keycodemax = ARRAY_SIZE(xtkbd_keycode); 119 120 for (i = 0; i < 255; i++) 121 set_bit(xtkbd->keycode[i], input_dev->keybit); 122 clear_bit(0, input_dev->keybit); 123 124 serio_set_drvdata(serio, xtkbd); 125 126 err = serio_open(serio, drv); 127 if (err) 128 goto fail; 129 130 input_register_device(xtkbd->dev); 131 return 0; 132 133 fail: serio_set_drvdata(serio, NULL); 134 input_free_device(input_dev); 135 kfree(xtkbd); 136 return err; 137 } 138 139 static void xtkbd_disconnect(struct serio *serio) 140 { 141 struct xtkbd *xtkbd = serio_get_drvdata(serio); 142 143 serio_close(serio); 144 serio_set_drvdata(serio, NULL); 145 input_unregister_device(xtkbd->dev); 146 kfree(xtkbd); 147 } 148 149 static struct serio_device_id xtkbd_serio_ids[] = { 150 { 151 .type = SERIO_XT, 152 .proto = SERIO_ANY, 153 .id = SERIO_ANY, 154 .extra = SERIO_ANY, 155 }, 156 { 0 } 157 }; 158 159 MODULE_DEVICE_TABLE(serio, xtkbd_serio_ids); 160 161 static struct serio_driver xtkbd_drv = { 162 .driver = { 163 .name = "xtkbd", 164 }, 165 .description = DRIVER_DESC, 166 .id_table = xtkbd_serio_ids, 167 .interrupt = xtkbd_interrupt, 168 .connect = xtkbd_connect, 169 .disconnect = xtkbd_disconnect, 170 }; 171 172 static int __init xtkbd_init(void) 173 { 174 serio_register_driver(&xtkbd_drv); 175 return 0; 176 } 177 178 static void __exit xtkbd_exit(void) 179 { 180 serio_unregister_driver(&xtkbd_drv); 181 } 182 183 module_init(xtkbd_init); 184 module_exit(xtkbd_exit); 185