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/init.h> 33 #include <linux/serio.h> 34 35 #define DRIVER_DESC "XT keyboard driver" 36 37 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 38 MODULE_DESCRIPTION(DRIVER_DESC); 39 MODULE_LICENSE("GPL"); 40 41 #define XTKBD_EMUL0 0xe0 42 #define XTKBD_EMUL1 0xe1 43 #define XTKBD_KEY 0x7f 44 #define XTKBD_RELEASE 0x80 45 46 static unsigned char xtkbd_keycode[256] = { 47 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 48 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 49 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 50 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 51 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 52 80, 81, 82, 83, 0, 0, 0, 87, 88, 0, 0, 0, 0, 0, 0, 0, 53 0, 0, 0, 0, 0, 87, 88, 0, 0, 0, 0,110,111,103,108,105, 54 106 55 }; 56 57 struct xtkbd { 58 unsigned char keycode[256]; 59 struct input_dev *dev; 60 struct serio *serio; 61 char phys[32]; 62 }; 63 64 static irqreturn_t xtkbd_interrupt(struct serio *serio, 65 unsigned char data, unsigned int flags) 66 { 67 struct xtkbd *xtkbd = serio_get_drvdata(serio); 68 69 switch (data) { 70 case XTKBD_EMUL0: 71 case XTKBD_EMUL1: 72 break; 73 default: 74 75 if (xtkbd->keycode[data & XTKBD_KEY]) { 76 input_report_key(xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE)); 77 input_sync(xtkbd->dev); 78 } else { 79 printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n", 80 data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed"); 81 } 82 } 83 return IRQ_HANDLED; 84 } 85 86 static int xtkbd_connect(struct serio *serio, struct serio_driver *drv) 87 { 88 struct xtkbd *xtkbd; 89 struct input_dev *input_dev; 90 int err = -ENOMEM; 91 int i; 92 93 xtkbd = kmalloc(sizeof(struct xtkbd), GFP_KERNEL); 94 input_dev = input_allocate_device(); 95 if (!xtkbd || !input_dev) 96 goto fail1; 97 98 xtkbd->serio = serio; 99 xtkbd->dev = input_dev; 100 snprintf(xtkbd->phys, sizeof(xtkbd->phys), "%s/input0", serio->phys); 101 memcpy(xtkbd->keycode, xtkbd_keycode, sizeof(xtkbd->keycode)); 102 103 input_dev->name = "XT Keyboard"; 104 input_dev->phys = xtkbd->phys; 105 input_dev->id.bustype = BUS_XTKBD; 106 input_dev->id.vendor = 0x0001; 107 input_dev->id.product = 0x0001; 108 input_dev->id.version = 0x0100; 109 input_dev->dev.parent = &serio->dev; 110 111 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); 112 input_dev->keycode = xtkbd->keycode; 113 input_dev->keycodesize = sizeof(unsigned char); 114 input_dev->keycodemax = ARRAY_SIZE(xtkbd_keycode); 115 116 for (i = 0; i < 255; i++) 117 set_bit(xtkbd->keycode[i], input_dev->keybit); 118 clear_bit(0, input_dev->keybit); 119 120 serio_set_drvdata(serio, xtkbd); 121 122 err = serio_open(serio, drv); 123 if (err) 124 goto fail2; 125 126 err = input_register_device(xtkbd->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(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 module_serio_driver(xtkbd_drv); 173