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