| 0,0 → 1,80 |
|---|
| /* |
| * Copyright (c) 2005 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup genericconsole |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #ifndef KERN_CHARDEV_H_ |
| #define KERN_CHARDEV_H_ |
| |
| #include <arch/types.h> |
| #include <synch/waitq.h> |
| #include <synch/spinlock.h> |
| |
| #define CHARDEV_BUFLEN 512 |
| |
| struct chardev; |
| |
| /* Character device operations interface. */ |
| typedef struct { |
| /** Suspend pushing characters. */ |
| void (* suspend)(struct chardev *); |
| /** Resume pushing characters. */ |
| void (* resume)(struct chardev *); |
| /** Write character to stream. */ |
| void (* write)(struct chardev *, char c); |
| /** Read character directly from device, assume interrupts disabled. */ |
| char (* read)(struct chardev *); |
| } chardev_operations_t; |
| |
| /** Character input device. */ |
| typedef struct chardev { |
| char *name; |
| |
| waitq_t wq; |
| /** Protects everything below. */ |
| SPINLOCK_DECLARE(lock); |
| uint8_t buffer[CHARDEV_BUFLEN]; |
| count_t counter; |
| /** Implementation of chardev operations. */ |
| chardev_operations_t *op; |
| index_t index; |
| void *data; |
| } chardev_t; |
| |
| extern void chardev_initialize(char *name, chardev_t *chardev, |
| chardev_operations_t *op); |
| extern void chardev_push_character(chardev_t *chardev, uint8_t ch); |
| |
| #endif /* KERN_CHARDEV_H_ */ |
| |
| /** @} |
| */ |