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1275 |
phoenix |
/*
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* linux/drivers/char/dummy_keyb.c
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*
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* Allows CONFIG_VT on hardware without keyboards.
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*
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* Copyright (C) 1999, 2001 Bradley D. LaRonde
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* What is this for?
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*
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* Not all systems have keyboards. Some don't even have a keyboard
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* port. However, some of those systems have video support and can
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* use the virtual terminal support for display. However, the virtual
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* terminal code expects a keyboard of some kind. This driver keeps
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* the virtual terminal code happy by providing it a "keyboard", albeit
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* a very quiet one.
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*
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* If you want to use the virtual terminal support but your system
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* does not support a keyboard, define CONFIG_DUMMY_KEYB along with
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* CONFIG_VT.
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*
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*/
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#include <linux/config.h>
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#include <linux/sched.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/input.h>
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void kbd_leds(unsigned char leds)
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{
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}
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int kbd_setkeycode(unsigned int scancode, unsigned int keycode)
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{
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return (scancode == keycode) ? 0 : -EINVAL;
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}
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int kbd_getkeycode(unsigned int scancode)
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{
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return scancode;
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}
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#ifdef CONFIG_INPUT
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static unsigned char e0_keys[128] = {
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0, 0, 0, KEY_KPCOMMA, 0, KEY_INTL3, 0, 0, /* 0x00-0x07 */
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0, 0, 0, 0, KEY_LANG1, KEY_LANG2, 0, 0, /* 0x08-0x0f */
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0, 0, 0, 0, 0, 0, 0, 0, /* 0x10-0x17 */
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0, 0, 0, 0, KEY_KPENTER, KEY_RIGHTCTRL, KEY_VOLUMEUP, 0,/* 0x18-0x1f */
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0, 0, 0, 0, 0, KEY_VOLUMEDOWN, KEY_MUTE, 0, /* 0x20-0x27 */
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0, 0, 0, 0, 0, 0, 0, 0, /* 0x28-0x2f */
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0, 0, 0, 0, 0, KEY_KPSLASH, 0, KEY_SYSRQ, /* 0x30-0x37 */
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KEY_RIGHTALT, KEY_BRIGHTNESSUP, KEY_BRIGHTNESSDOWN,
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KEY_EJECTCD, 0, 0, 0, 0, /* 0x38-0x3f */
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0, 0, 0, 0, 0, 0, 0, KEY_HOME, /* 0x40-0x47 */
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KEY_UP, KEY_PAGEUP, 0, KEY_LEFT, 0, KEY_RIGHT, 0, KEY_END, /* 0x48-0x4f */
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KEY_DOWN, KEY_PAGEDOWN, KEY_INSERT, KEY_DELETE, 0, 0, 0, 0, /* 0x50-0x57 */
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0, 0, 0, KEY_LEFTMETA, KEY_RIGHTMETA, KEY_COMPOSE, KEY_POWER, 0, /* 0x58-0x5f */
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0, 0, 0, 0, 0, 0, 0, 0, /* 0x60-0x67 */
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0, 0, 0, 0, 0, 0, 0, KEY_MACRO, /* 0x68-0x6f */
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0, 0, 0, 0, 0, 0, 0, 0, /* 0x70-0x77 */
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0, 0, 0, 0, 0, 0, 0, 0 /* 0x78-0x7f */
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};
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int kbd_translate(unsigned char scancode, unsigned char *keycode,
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char raw_mode)
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{
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/* This code was copied from char/pc_keyb.c and will be
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* superflous when the input layer is fully integrated.
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* We don't need the high_keys handling, so this part
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* has been removed.
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*/
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static int prev_scancode = 0;
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/* special prefix scancodes.. */
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if (scancode == 0xe0 || scancode == 0xe1) {
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prev_scancode = scancode;
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return 0;
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}
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scancode &= 0x7f;
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if (prev_scancode) {
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if (prev_scancode != 0xe0) {
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if (prev_scancode == 0xe1 && scancode == 0x1d) {
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prev_scancode = 0x100;
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return 0;
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} else if (prev_scancode == 0x100 && scancode == 0x45) {
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*keycode = KEY_PAUSE;
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prev_scancode = 0;
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} else {
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if (!raw_mode)
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printk(KERN_INFO "keyboard: unknown e1 escape sequence\n");
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prev_scancode = 0;
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return 0;
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}
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} else {
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prev_scancode = 0;
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if (scancode == 0x2a || scancode == 0x36)
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return 0;
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}
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if (e0_keys[scancode])
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*keycode = e0_keys[scancode];
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else {
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if (!raw_mode)
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printk(KERN_INFO "keyboard: unknown scancode e0 %02x\n",
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scancode);
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return 0;
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}
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} else {
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switch (scancode) {
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case 91: scancode = KEY_LINEFEED; break;
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case 92: scancode = KEY_KPEQUAL; break;
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case 125: scancode = KEY_INTL1; break;
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}
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*keycode = scancode;
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}
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return 1;
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}
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#else
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int kbd_translate(unsigned char scancode, unsigned char *keycode,
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char raw_mode)
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{
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*keycode = scancode;
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return 1;
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}
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#endif
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char kbd_unexpected_up(unsigned char keycode)
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{
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return 0x80;
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}
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void __init kbd_init_hw(void)
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{
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printk("Dummy keyboard driver installed.\n");
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}
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