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 const 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