drivers/s390/char/keyboard.h

   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
  15 struct kbd_data;
  16
  17 extern int ebc_funcbufsize, ebc_funcbufleft;
  18 extern char *ebc_func_table[MAX_NR_FUNC];
  19 extern char ebc_func_buf[];
  20 extern char *ebc_funcbufptr;
  21 extern unsigned int ebc_keymap_count;
  22
  23 extern struct kbdiacruc ebc_accent_table[];
  24 extern unsigned int ebc_accent_table_size;
  25 extern unsigned short *ebc_key_maps[MAX_NR_KEYMAPS];
  26 extern unsigned short ebc_plain_map[NR_KEYS];
  27
  28 typedef void (fn_handler_fn)(struct kbd_data *);
  29
  30 /*
  31  * FIXME: explain key_maps tricks.
  32  */
  33
  34 struct 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
  45 struct kbd_data *kbd_alloc(void);
  46 void kbd_free(struct kbd_data *);
  47 void kbd_ascebc(struct kbd_data *, unsigned char *);
  48
  49 void kbd_keycode(struct kbd_data *, unsigned int);
  50 int kbd_ioctl(struct kbd_data *, unsigned int, unsigned long);
  51
  52 /*
  53  * Helper Functions.
  54  */
  55 static inline void
  56 kbd_put_queue(struct tty_port *port, int ch)
  57 {
  58         tty_insert_flip_char(port, ch, 0);
  59         tty_schedule_flip(port);
  60 }
  61
  62 static inline void
  63 kbd_puts_queue(struct tty_port *port, char *cp)
  64 {
  65         while (*cp)
  66                 tty_insert_flip_char(port, *cp++, 0);
  67         tty_schedule_flip(port);
  68 }