device.h

Bycore是一个嵌入式操作系统内核。Bycore包括内存管理、任务管理、中断管理、任务互斥、同步与通信管理等功能。Bycore全部由C语言完成

/**
 *  device.h
 *
 *  Copyright (C) 2008  ZhangHu
 *  All rights reserved.
 *  E-MAIL: [e-mail]
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __DEVICE_H__
#define __DEVICE_H__

#include "include/types.h"
#include "include/list.h"
#include "include/mem.h"
#include "include/spinlock.h"

#define DEVICE_NR 255  // Suport to 255 devices.


typedef struct _device {
    list_t link;
    spinlock_t lock;
    word_t used_cnt;
    char_t *name;
    char_t mid;
    char_t sid;
    char_t dev_type;
    bool_t delete_flag;
} device_t;

// For dev_type
#define CHDEV 0x01  // Char device.
#define BLKDEV 0x02 // Block device.
#define NETDEV 0x03 // network device.

#define DEV_FALSE FALSE
#define DEV_OK TRUE
#define DEV_NO_MEM 0x2
#define DEV_NO_DEVICE 0x3
#define DEV_BUSY 0x4
#define DEV_FREE 0x5

typedef void (*device_init_func)(void);

/* Initialize all devices. */
void device_init(void);

/* Char device register. */
word_t char_device_register(device_t *dev,/* Pointer to device node */
                            const char_t *Name,/* Device name */
                            char_t Mid,/* Main ID */
                            char_t Sid);/* Secondary ID */

/* Open a device */
device_t *device_open(const char_t *name);

/* Close a device */
void device_close(device_t *dev);

/* Delete a device */
device_t *device_delete(uword_t chdevMID, uword_t chdevSID);

#endif