550 lines
12 KiB
C
550 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* ebcdic keycode functions for s390 console drivers
|
|
*
|
|
* S390 version
|
|
* Copyright IBM Corp. 2003
|
|
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/sched/signal.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/sysrq.h>
|
|
|
|
#include <linux/consolemap.h>
|
|
#include <linux/kbd_kern.h>
|
|
#include <linux/kbd_diacr.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
#include "keyboard.h"
|
|
|
|
/*
|
|
* Handler Tables.
|
|
*/
|
|
#define K_HANDLERS\
|
|
k_self, k_fn, k_spec, k_ignore,\
|
|
k_dead, k_ignore, k_ignore, k_ignore,\
|
|
k_ignore, k_ignore, k_ignore, k_ignore,\
|
|
k_ignore, k_ignore, k_ignore, k_ignore
|
|
|
|
typedef void (k_handler_fn)(struct kbd_data *, unsigned char);
|
|
static k_handler_fn K_HANDLERS;
|
|
static k_handler_fn *k_handler[16] = { K_HANDLERS };
|
|
|
|
/* maximum values each key_handler can handle */
|
|
static const int kbd_max_vals[] = {
|
|
255, ARRAY_SIZE(func_table) - 1, NR_FN_HANDLER - 1, 0,
|
|
NR_DEAD - 1, 0, 0, 0, 0, 0, 0, 0, 0, 0
|
|
};
|
|
static const int KBD_NR_TYPES = ARRAY_SIZE(kbd_max_vals);
|
|
|
|
static unsigned char ret_diacr[NR_DEAD] = {
|
|
'`', '\'', '^', '~', '"', ','
|
|
};
|
|
|
|
/*
|
|
* Alloc/free of kbd_data structures.
|
|
*/
|
|
struct kbd_data *
|
|
kbd_alloc(void) {
|
|
struct kbd_data *kbd;
|
|
int i;
|
|
|
|
kbd = kzalloc(sizeof(struct kbd_data), GFP_KERNEL);
|
|
if (!kbd)
|
|
goto out;
|
|
kbd->key_maps = kzalloc(sizeof(key_maps), GFP_KERNEL);
|
|
if (!kbd->key_maps)
|
|
goto out_kbd;
|
|
for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
|
|
if (key_maps[i]) {
|
|
kbd->key_maps[i] = kmemdup(key_maps[i],
|
|
sizeof(u_short) * NR_KEYS,
|
|
GFP_KERNEL);
|
|
if (!kbd->key_maps[i])
|
|
goto out_maps;
|
|
}
|
|
}
|
|
kbd->func_table = kzalloc(sizeof(func_table), GFP_KERNEL);
|
|
if (!kbd->func_table)
|
|
goto out_maps;
|
|
for (i = 0; i < ARRAY_SIZE(func_table); i++) {
|
|
if (func_table[i]) {
|
|
kbd->func_table[i] = kstrdup(func_table[i],
|
|
GFP_KERNEL);
|
|
if (!kbd->func_table[i])
|
|
goto out_func;
|
|
}
|
|
}
|
|
kbd->fn_handler =
|
|
kzalloc(sizeof(fn_handler_fn *) * NR_FN_HANDLER, GFP_KERNEL);
|
|
if (!kbd->fn_handler)
|
|
goto out_func;
|
|
kbd->accent_table = kmemdup(accent_table,
|
|
sizeof(struct kbdiacruc) * MAX_DIACR,
|
|
GFP_KERNEL);
|
|
if (!kbd->accent_table)
|
|
goto out_fn_handler;
|
|
kbd->accent_table_size = accent_table_size;
|
|
return kbd;
|
|
|
|
out_fn_handler:
|
|
kfree(kbd->fn_handler);
|
|
out_func:
|
|
for (i = 0; i < ARRAY_SIZE(func_table); i++)
|
|
kfree(kbd->func_table[i]);
|
|
kfree(kbd->func_table);
|
|
out_maps:
|
|
for (i = 0; i < ARRAY_SIZE(key_maps); i++)
|
|
kfree(kbd->key_maps[i]);
|
|
kfree(kbd->key_maps);
|
|
out_kbd:
|
|
kfree(kbd);
|
|
out:
|
|
return NULL;
|
|
}
|
|
|
|
void
|
|
kbd_free(struct kbd_data *kbd)
|
|
{
|
|
int i;
|
|
|
|
kfree(kbd->accent_table);
|
|
kfree(kbd->fn_handler);
|
|
for (i = 0; i < ARRAY_SIZE(func_table); i++)
|
|
kfree(kbd->func_table[i]);
|
|
kfree(kbd->func_table);
|
|
for (i = 0; i < ARRAY_SIZE(key_maps); i++)
|
|
kfree(kbd->key_maps[i]);
|
|
kfree(kbd->key_maps);
|
|
kfree(kbd);
|
|
}
|
|
|
|
/*
|
|
* Generate ascii -> ebcdic translation table from kbd_data.
|
|
*/
|
|
void
|
|
kbd_ascebc(struct kbd_data *kbd, unsigned char *ascebc)
|
|
{
|
|
unsigned short *keymap, keysym;
|
|
int i, j, k;
|
|
|
|
memset(ascebc, 0x40, 256);
|
|
for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
|
|
keymap = kbd->key_maps[i];
|
|
if (!keymap)
|
|
continue;
|
|
for (j = 0; j < NR_KEYS; j++) {
|
|
k = ((i & 1) << 7) + j;
|
|
keysym = keymap[j];
|
|
if (KTYP(keysym) == (KT_LATIN | 0xf0) ||
|
|
KTYP(keysym) == (KT_LETTER | 0xf0))
|
|
ascebc[KVAL(keysym)] = k;
|
|
else if (KTYP(keysym) == (KT_DEAD | 0xf0))
|
|
ascebc[ret_diacr[KVAL(keysym)]] = k;
|
|
}
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
/*
|
|
* Generate ebcdic -> ascii translation table from kbd_data.
|
|
*/
|
|
void
|
|
kbd_ebcasc(struct kbd_data *kbd, unsigned char *ebcasc)
|
|
{
|
|
unsigned short *keymap, keysym;
|
|
int i, j, k;
|
|
|
|
memset(ebcasc, ' ', 256);
|
|
for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
|
|
keymap = kbd->key_maps[i];
|
|
if (!keymap)
|
|
continue;
|
|
for (j = 0; j < NR_KEYS; j++) {
|
|
keysym = keymap[j];
|
|
k = ((i & 1) << 7) + j;
|
|
if (KTYP(keysym) == (KT_LATIN | 0xf0) ||
|
|
KTYP(keysym) == (KT_LETTER | 0xf0))
|
|
ebcasc[k] = KVAL(keysym);
|
|
else if (KTYP(keysym) == (KT_DEAD | 0xf0))
|
|
ebcasc[k] = ret_diacr[KVAL(keysym)];
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* We have a combining character DIACR here, followed by the character CH.
|
|
* If the combination occurs in the table, return the corresponding value.
|
|
* Otherwise, if CH is a space or equals DIACR, return DIACR.
|
|
* Otherwise, conclude that DIACR was not combining after all,
|
|
* queue it and return CH.
|
|
*/
|
|
static unsigned int
|
|
handle_diacr(struct kbd_data *kbd, unsigned int ch)
|
|
{
|
|
int i, d;
|
|
|
|
d = kbd->diacr;
|
|
kbd->diacr = 0;
|
|
|
|
for (i = 0; i < kbd->accent_table_size; i++) {
|
|
if (kbd->accent_table[i].diacr == d &&
|
|
kbd->accent_table[i].base == ch)
|
|
return kbd->accent_table[i].result;
|
|
}
|
|
|
|
if (ch == ' ' || ch == d)
|
|
return d;
|
|
|
|
kbd_put_queue(kbd->port, d);
|
|
return ch;
|
|
}
|
|
|
|
/*
|
|
* Handle dead key.
|
|
*/
|
|
static void
|
|
k_dead(struct kbd_data *kbd, unsigned char value)
|
|
{
|
|
value = ret_diacr[value];
|
|
kbd->diacr = (kbd->diacr ? handle_diacr(kbd, value) : value);
|
|
}
|
|
|
|
/*
|
|
* Normal character handler.
|
|
*/
|
|
static void
|
|
k_self(struct kbd_data *kbd, unsigned char value)
|
|
{
|
|
if (kbd->diacr)
|
|
value = handle_diacr(kbd, value);
|
|
kbd_put_queue(kbd->port, value);
|
|
}
|
|
|
|
/*
|
|
* Special key handlers
|
|
*/
|
|
static void
|
|
k_ignore(struct kbd_data *kbd, unsigned char value)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Function key handler.
|
|
*/
|
|
static void
|
|
k_fn(struct kbd_data *kbd, unsigned char value)
|
|
{
|
|
if (kbd->func_table[value])
|
|
kbd_puts_queue(kbd->port, kbd->func_table[value]);
|
|
}
|
|
|
|
static void
|
|
k_spec(struct kbd_data *kbd, unsigned char value)
|
|
{
|
|
if (value >= NR_FN_HANDLER)
|
|
return;
|
|
if (kbd->fn_handler[value])
|
|
kbd->fn_handler[value](kbd);
|
|
}
|
|
|
|
/*
|
|
* Put utf8 character to tty flip buffer.
|
|
* UTF-8 is defined for words of up to 31 bits,
|
|
* but we need only 16 bits here
|
|
*/
|
|
static void
|
|
to_utf8(struct tty_port *port, ushort c)
|
|
{
|
|
if (c < 0x80)
|
|
/* 0******* */
|
|
kbd_put_queue(port, c);
|
|
else if (c < 0x800) {
|
|
/* 110***** 10****** */
|
|
kbd_put_queue(port, 0xc0 | (c >> 6));
|
|
kbd_put_queue(port, 0x80 | (c & 0x3f));
|
|
} else {
|
|
/* 1110**** 10****** 10****** */
|
|
kbd_put_queue(port, 0xe0 | (c >> 12));
|
|
kbd_put_queue(port, 0x80 | ((c >> 6) & 0x3f));
|
|
kbd_put_queue(port, 0x80 | (c & 0x3f));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Process keycode.
|
|
*/
|
|
void
|
|
kbd_keycode(struct kbd_data *kbd, unsigned int keycode)
|
|
{
|
|
unsigned short keysym;
|
|
unsigned char type, value;
|
|
|
|
if (!kbd)
|
|
return;
|
|
|
|
if (keycode >= 384)
|
|
keysym = kbd->key_maps[5][keycode - 384];
|
|
else if (keycode >= 256)
|
|
keysym = kbd->key_maps[4][keycode - 256];
|
|
else if (keycode >= 128)
|
|
keysym = kbd->key_maps[1][keycode - 128];
|
|
else
|
|
keysym = kbd->key_maps[0][keycode];
|
|
|
|
type = KTYP(keysym);
|
|
if (type >= 0xf0) {
|
|
type -= 0xf0;
|
|
if (type == KT_LETTER)
|
|
type = KT_LATIN;
|
|
value = KVAL(keysym);
|
|
#ifdef CONFIG_MAGIC_SYSRQ /* Handle the SysRq Hack */
|
|
if (kbd->sysrq) {
|
|
if (kbd->sysrq == K(KT_LATIN, '-')) {
|
|
kbd->sysrq = 0;
|
|
handle_sysrq(value);
|
|
return;
|
|
}
|
|
if (value == '-') {
|
|
kbd->sysrq = K(KT_LATIN, '-');
|
|
return;
|
|
}
|
|
/* Incomplete sysrq sequence. */
|
|
(*k_handler[KTYP(kbd->sysrq)])(kbd, KVAL(kbd->sysrq));
|
|
kbd->sysrq = 0;
|
|
} else if ((type == KT_LATIN && value == '^') ||
|
|
(type == KT_DEAD && ret_diacr[value] == '^')) {
|
|
kbd->sysrq = K(type, value);
|
|
return;
|
|
}
|
|
#endif
|
|
(*k_handler[type])(kbd, value);
|
|
} else
|
|
to_utf8(kbd->port, keysym);
|
|
}
|
|
|
|
/*
|
|
* Ioctl stuff.
|
|
*/
|
|
static int
|
|
do_kdsk_ioctl(struct kbd_data *kbd, struct kbentry __user *user_kbe,
|
|
int cmd, int perm)
|
|
{
|
|
struct kbentry tmp;
|
|
ushort *key_map, val, ov;
|
|
|
|
if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
|
|
return -EFAULT;
|
|
#if NR_KEYS < 256
|
|
if (tmp.kb_index >= NR_KEYS)
|
|
return -EINVAL;
|
|
#endif
|
|
#if MAX_NR_KEYMAPS < 256
|
|
if (tmp.kb_table >= MAX_NR_KEYMAPS)
|
|
return -EINVAL;
|
|
#endif
|
|
|
|
switch (cmd) {
|
|
case KDGKBENT:
|
|
key_map = kbd->key_maps[tmp.kb_table];
|
|
if (key_map) {
|
|
val = U(key_map[tmp.kb_index]);
|
|
if (KTYP(val) >= KBD_NR_TYPES)
|
|
val = K_HOLE;
|
|
} else
|
|
val = (tmp.kb_index ? K_HOLE : K_NOSUCHMAP);
|
|
return put_user(val, &user_kbe->kb_value);
|
|
case KDSKBENT:
|
|
if (!perm)
|
|
return -EPERM;
|
|
if (!tmp.kb_index && tmp.kb_value == K_NOSUCHMAP) {
|
|
/* disallocate map */
|
|
key_map = kbd->key_maps[tmp.kb_table];
|
|
if (key_map) {
|
|
kbd->key_maps[tmp.kb_table] = NULL;
|
|
kfree(key_map);
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (KTYP(tmp.kb_value) >= KBD_NR_TYPES)
|
|
return -EINVAL;
|
|
if (KVAL(tmp.kb_value) > kbd_max_vals[KTYP(tmp.kb_value)])
|
|
return -EINVAL;
|
|
|
|
if (!(key_map = kbd->key_maps[tmp.kb_table])) {
|
|
int j;
|
|
|
|
key_map = kmalloc(sizeof(plain_map),
|
|
GFP_KERNEL);
|
|
if (!key_map)
|
|
return -ENOMEM;
|
|
kbd->key_maps[tmp.kb_table] = key_map;
|
|
for (j = 0; j < NR_KEYS; j++)
|
|
key_map[j] = U(K_HOLE);
|
|
}
|
|
ov = U(key_map[tmp.kb_index]);
|
|
if (tmp.kb_value == ov)
|
|
break; /* nothing to do */
|
|
/*
|
|
* Attention Key.
|
|
*/
|
|
if (((ov == K_SAK) || (tmp.kb_value == K_SAK)) &&
|
|
!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
key_map[tmp.kb_index] = U(tmp.kb_value);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
do_kdgkb_ioctl(struct kbd_data *kbd, struct kbsentry __user *u_kbs,
|
|
int cmd, int perm)
|
|
{
|
|
unsigned char kb_func;
|
|
char *p;
|
|
int len;
|
|
|
|
/* Get u_kbs->kb_func. */
|
|
if (get_user(kb_func, &u_kbs->kb_func))
|
|
return -EFAULT;
|
|
#if MAX_NR_FUNC < 256
|
|
if (kb_func >= MAX_NR_FUNC)
|
|
return -EINVAL;
|
|
#endif
|
|
|
|
switch (cmd) {
|
|
case KDGKBSENT:
|
|
p = kbd->func_table[kb_func];
|
|
if (p) {
|
|
len = strlen(p);
|
|
if (len >= sizeof(u_kbs->kb_string))
|
|
len = sizeof(u_kbs->kb_string) - 1;
|
|
if (copy_to_user(u_kbs->kb_string, p, len))
|
|
return -EFAULT;
|
|
} else
|
|
len = 0;
|
|
if (put_user('\0', u_kbs->kb_string + len))
|
|
return -EFAULT;
|
|
break;
|
|
case KDSKBSENT:
|
|
if (!perm)
|
|
return -EPERM;
|
|
p = strndup_user(u_kbs->kb_string, sizeof(u_kbs->kb_string));
|
|
if (IS_ERR(p))
|
|
return PTR_ERR(p);
|
|
kfree(kbd->func_table[kb_func]);
|
|
kbd->func_table[kb_func] = p;
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int kbd_ioctl(struct kbd_data *kbd, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct tty_struct *tty;
|
|
void __user *argp;
|
|
unsigned int ct;
|
|
int perm;
|
|
|
|
argp = (void __user *)arg;
|
|
|
|
/*
|
|
* To have permissions to do most of the vt ioctls, we either have
|
|
* to be the owner of the tty, or have CAP_SYS_TTY_CONFIG.
|
|
*/
|
|
tty = tty_port_tty_get(kbd->port);
|
|
/* FIXME this test is pretty racy */
|
|
perm = current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG);
|
|
tty_kref_put(tty);
|
|
switch (cmd) {
|
|
case KDGKBTYPE:
|
|
return put_user(KB_101, (char __user *)argp);
|
|
case KDGKBENT:
|
|
case KDSKBENT:
|
|
return do_kdsk_ioctl(kbd, argp, cmd, perm);
|
|
case KDGKBSENT:
|
|
case KDSKBSENT:
|
|
return do_kdgkb_ioctl(kbd, argp, cmd, perm);
|
|
case KDGKBDIACR:
|
|
{
|
|
struct kbdiacrs __user *a = argp;
|
|
struct kbdiacr diacr;
|
|
int i;
|
|
|
|
if (put_user(kbd->accent_table_size, &a->kb_cnt))
|
|
return -EFAULT;
|
|
for (i = 0; i < kbd->accent_table_size; i++) {
|
|
diacr.diacr = kbd->accent_table[i].diacr;
|
|
diacr.base = kbd->accent_table[i].base;
|
|
diacr.result = kbd->accent_table[i].result;
|
|
if (copy_to_user(a->kbdiacr + i, &diacr, sizeof(struct kbdiacr)))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
case KDGKBDIACRUC:
|
|
{
|
|
struct kbdiacrsuc __user *a = argp;
|
|
|
|
ct = kbd->accent_table_size;
|
|
if (put_user(ct, &a->kb_cnt))
|
|
return -EFAULT;
|
|
if (copy_to_user(a->kbdiacruc, kbd->accent_table,
|
|
ct * sizeof(struct kbdiacruc)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
case KDSKBDIACR:
|
|
{
|
|
struct kbdiacrs __user *a = argp;
|
|
struct kbdiacr diacr;
|
|
int i;
|
|
|
|
if (!perm)
|
|
return -EPERM;
|
|
if (get_user(ct, &a->kb_cnt))
|
|
return -EFAULT;
|
|
if (ct >= MAX_DIACR)
|
|
return -EINVAL;
|
|
kbd->accent_table_size = ct;
|
|
for (i = 0; i < ct; i++) {
|
|
if (copy_from_user(&diacr, a->kbdiacr + i, sizeof(struct kbdiacr)))
|
|
return -EFAULT;
|
|
kbd->accent_table[i].diacr = diacr.diacr;
|
|
kbd->accent_table[i].base = diacr.base;
|
|
kbd->accent_table[i].result = diacr.result;
|
|
}
|
|
return 0;
|
|
}
|
|
case KDSKBDIACRUC:
|
|
{
|
|
struct kbdiacrsuc __user *a = argp;
|
|
|
|
if (!perm)
|
|
return -EPERM;
|
|
if (get_user(ct, &a->kb_cnt))
|
|
return -EFAULT;
|
|
if (ct >= MAX_DIACR)
|
|
return -EINVAL;
|
|
kbd->accent_table_size = ct;
|
|
if (copy_from_user(kbd->accent_table, a->kbdiacruc,
|
|
ct * sizeof(struct kbdiacruc)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
}
|
|
|
|
EXPORT_SYMBOL(kbd_ioctl);
|
|
EXPORT_SYMBOL(kbd_ascebc);
|
|
EXPORT_SYMBOL(kbd_free);
|
|
EXPORT_SYMBOL(kbd_alloc);
|
|
EXPORT_SYMBOL(kbd_keycode);
|