atapi.h

来自「em86xx 完整启动程序,支持网络下载与串通下载」· C头文件 代码 · 共 54 行

/*****************************************
 Copyright (c) 2002-2004
 Sigma Designs, Inc. All Rights Reserved
 Proprietary and Confidential
 *****************************************/

/* This file is part of the EM86XX boot loader */

/*
 * atapi.h
 *
 * ATAPI support
 *
 * modified from jasper boot loader by Ho Lee 03/09/2004
 */

#ifndef __BOOTLOADER_ATAPI_H
#define __BOOTLOADER_ATAPI_H

// atapi error codes
#define ATAPIRES_OK         0           // i/o done
#define ATAPIRES_ERR        1           // i/o finished with error
#define ATAPIRES_NOTRDY     2           // controller not ready
#define ATAPIRES_NODRQ      3           // no data request
#define ATAPIRES_INVDIR     4           // invalid bus phase direction
#define ATAPIRES_OVERRUN    5           // data overrun
#define ATAPIRES_UNDERRUN   6           // data underrun
#define ATAPIRES_BM_ERROR1  7           // interrupt came but status indicated error
#define ATAPIRES_BM_ERROR2  8           // interrupt came but io is not completed

#define ATAPIDIR_NONE       0
#define ATAPIDIR_READ       1
#define ATAPIDIR_WRITE      2

typedef struct tag_packet_command {
    unsigned char *buffer;              // data buffer (used by specific atapi commands to read data from atapi device)
    int buflen;                         // length of buffer
    int stat;                           // result of command (0 = success, !0 = error) see ATAPIRES_xxx definitions
    unsigned char c[12];                // 12 byte atapi packet command
    int data_direction;                 // ATAPIDIR_xxx
    // reserved for driver use
    int error;
    unsigned char *addr;
    int count;
} packet_command_t;

// function prototypes
int atapi_eject(int drive, int open);
int atapi_readsense(int drive, char *sensedata);
int atapi_waitready(int drive, int timeout);
int atapi_readsector(int drive, void *buf, unsigned long first, int nsector);

#endif