1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * ebcdic keycode functions for s390 console drivers
4 *
5 * Copyright IBM Corp. 2003
6 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
7 */
8
9#include <linux/tty.h>
10#include <linux/tty_flip.h>
11#include <linux/keyboard.h>
12
13#define NR_FN_HANDLER 20
14
15struct kbd_data;
16
17extern int ebc_funcbufsize, ebc_funcbufleft;
18extern char *ebc_func_table[MAX_NR_FUNC];
19extern char ebc_func_buf[];
20extern char *ebc_funcbufptr;
21extern unsigned int ebc_keymap_count;
22
23extern struct kbdiacruc ebc_accent_table[];
24extern unsigned int ebc_accent_table_size;
25extern unsigned short *ebc_key_maps[MAX_NR_KEYMAPS];
26extern unsigned short ebc_plain_map[NR_KEYS];
27
28typedef void (fn_handler_fn)(struct kbd_data *);
29
30/*
31 * FIXME: explain key_maps tricks.
32 */
33
34struct kbd_data {
35 struct tty_port *port;
36 unsigned short **key_maps;
37 char **func_table;
38 fn_handler_fn **fn_handler;
39 struct kbdiacruc *accent_table;
40 unsigned int accent_table_size;
41 unsigned int diacr;
42 unsigned short sysrq;
43};
44
45struct kbd_data *kbd_alloc(void);
46void kbd_free(struct kbd_data *);
47void kbd_ascebc(struct kbd_data *, unsigned char *);
48
49void kbd_keycode(struct kbd_data *, unsigned int);
50int kbd_ioctl(struct kbd_data *, unsigned int, unsigned long);
51
52/*
53 * Helper Functions.
54 */
55static inline void
56kbd_put_queue(struct tty_port *port, int ch)
57{
58 tty_insert_flip_char(port, ch, flag: 0);
59 tty_flip_buffer_push(port);
60}
61
62static inline void
63kbd_puts_queue(struct tty_port *port, char *cp)
64{
65 while (*cp)
66 tty_insert_flip_char(port, ch: *cp++, flag: 0);
67 tty_flip_buffer_push(port);
68}
69

source code of linux/drivers/s390/char/keyboard.h