projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 45d607ed RA |
1 | /* |
| 2 | * hvc_console.h | |
| 3 | * Copyright (C) 2005 IBM Corporation | |
| 4 | * | |
| 5 | * Author(s): | |
| 6 | * Ryan S. Arnold <rsa@us.ibm.com> | |
| 7 | * | |
| 8 | * hvc_console header information: | |
| 9 | * moved here from include/asm-powerpc/hvconsole.h | |
| 10 | * and drivers/char/hvc_console.c | |
| 11 | * | |
| 12 | * This program is free software; you can redistribute it and/or modify | |
| 13 | * it under the terms of the GNU General Public License as published by | |
| 14 | * the Free Software Foundation; either version 2 of the License, or | |
| 15 | * (at your option) any later version. | |
| 16 | * | |
| 17 | * This program is distributed in the hope that it will be useful, | |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 20 | * GNU General Public License for more details. | |
| 21 | * | |
| 22 | * You should have received a copy of the GNU General Public License | |
| 23 | * along with this program; if not, write to the Free Software | |
| 24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 25 | */ | |
| 26 | ||
| 27 | #ifndef HVC_CONSOLE_H | |
| 28 | #define HVC_CONSOLE_H | |
| 29 | ||
| 30 | /* | |
| 31 | * This is the max number of console adapters that can/will be found as | |
| 32 | * console devices on first stage console init. Any number beyond this range | |
| 33 | * can't be used as a console device but is still a valid tty device. | |
| 34 | */ | |
| 35 | #define MAX_NR_HVC_CONSOLES 16 | |
| 36 | ||
| 37 | /* | |
| 38 | * The Linux TTY code does not support dynamic addition of tty derived devices | |
| 39 | * so we need to know how many tty devices we might need when space is allocated | |
| 40 | * for the tty device. Since this driver supports hotplug of vty adapters we | |
| 41 | * need to make sure we have enough allocated. | |
| 42 | */ | |
| 43 | #define HVC_ALLOC_TTY_ADAPTERS 8 | |
| 44 | ||
| 45 | ||
| 46 | /* implemented by a low level driver */ | |
| 47 | struct hv_ops { | |
| 48 | int (*get_chars)(uint32_t vtermno, char *buf, int count); | |
| 49 | int (*put_chars)(uint32_t vtermno, const char *buf, int count); | |
| 50 | }; | |
| 51 | ||
| 52 | struct hvc_struct; | |
| 53 | ||
| 54 | /* Register a vterm and a slot index for use as a console (console_init) */ | |
| 55 | extern int hvc_instantiate(uint32_t vtermno, int index, struct hv_ops *ops); | |
| 56 | ||
| 57 | /* register a vterm for hvc tty operation (module_init or hotplug add) */ | |
| 58 | extern struct hvc_struct * __devinit hvc_alloc(uint32_t vtermno, int irq, | |
| 59 | struct hv_ops *ops); | |
| 60 | /* remove a vterm from hvc tty operation (modele_exit or hotplug remove) */ | |
| 61 | extern int __devexit hvc_remove(struct hvc_struct *hp); | |
| 62 | ||
| 63 | #endif // HVC_CONSOLE_H |