scsi.h

看到最近大家都关心 usbhost 的实现, 论坛上能找到的代码仅是一些简单的 demo , 完整的源码级的协议层是找不到的 我就贡献一把, 将我前一段时间移植成功的 USBHost 代码奉上 注

/*
 * (C) Copyright 2001
 * Denis Peter, MPL AG Switzerland
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 */
#ifndef _SCSI_H
#define _SCSI_H
typedef struct SCSI_cmd_block
{
    unsigned char    cmd[16];          /* command           */
    unsigned char    sense_buf[64];    /* for request sense */
    unsigned char    status;            /* SCSI Status       */
    unsigned char    target;            /* Target ID         */
    unsigned char    lun;              /* Target LUN        */
    unsigned char    cmdlen;            /* command len        */
    unsigned long    datalen;          /* Total data length  */
    unsigned char  *  pdata;             /* pointer to data    */
    unsigned char    msgout[12];        /* Messge out buffer (NOT USED) */
    unsigned char    msgin[12];        /* Message in buffer  */
    unsigned char    sensecmdlen;      /* Sense command len  */
    unsigned long    sensedatalen;      /* Sense data len      */
    unsigned char    sensecmd[6];      /* Sense command      */
    unsigned long    contr_stat;        /* Controller Status  */
    unsigned long    trans_bytes;      /* tranfered bytes    */
    unsigned int    priv;
}


ccb;
/*-----------------------------------------------------------
**
**  SCSI  constants.
**
**-----------------------------------------------------------
*/
/*
**  Messages
*/
#define  M_COMPLETE     (0x00)
#define  M_EXTENDED     (0x01)
#define  M_SAVE_DP      (0x02)
#define  M_RESTORE_DP   (0x03)
#define  M_DISCONNECT   (0x04)
#define  M_ID_ERROR     (0x05)
#define  M_ABORT        (0x06)
#define  M_REJECT       (0x07)
#define  M_NOOP         (0x08)
#define  M_PARITY       (0x09)
#define  M_LCOMPLETE    (0x0a)
#define  M_FCOMPLETE    (0x0b)
#define  M_RESET        (0x0c)
#define  M_ABORT_TAG    (0x0d)
#define  M_CLEAR_QUEUE  (0x0e)
#define  M_INIT_REC     (0x0f)
#define  M_REL_REC      (0x10)
#define  M_TERMINATE    (0x11)
#define  M_SIMPLE_TAG   (0x20)
#define  M_HEAD_TAG     (0x21)
#define  M_ORDERED_TAG  (0x22)
#define  M_IGN_RESIDUE  (0x23)
#define  M_IDENTIFY     (0x80)
#define  M_X_MODIFY_DP  (0x00)
#define  M_X_SYNC_REQ   (0x01)
#define  M_X_WIDE_REQ   (0x03)
#define  M_X_PPR_REQ    (0x04)
/*
**  Status
*/
#define  S_GOOD         (0x00)
#define  S_CHECK_COND   (0x02)
#define  S_COND_MET     (0x04)
#define  S_BUSY         (0x08)
#define  S_INT          (0x10)
#define  S_INT_COND_MET (0x14)
#define  S_CONFLICT     (0x18)
#define  S_TERMINATED   (0x20)
#define  S_QUEUE_FULL   (0x28)
#define  S_ILLEGAL      (0xff)
#define  S_SENSE        (0x80)
/*
 * Sense_keys
 */
#define SENSE_NO_SENSE          0x0
#define SENSE_RECOVERED_ERROR   0x1
#define SENSE_NOT_READY         0x2
#define SENSE_MEDIUM_ERROR      0x3
#define SENSE_HARDWARE_ERROR    0x4
#define SENSE_ILLEGAL_REQUEST   0x5
#define SENSE_UNIT_ATTENTION    0x6
#define SENSE_DATA_PROTECT      0x7
#define SENSE_BLANK_CHECK       0x8
#define SENSE_VENDOR_SPECIFIC   0x9
#define SENSE_COPY_ABORTED      0xA
#define SENSE_ABORTED_COMMAND   0xB
#define SENSE_VOLUME_OVERFLOW   0xD
#define SENSE_MISCOMPARE        0xE
#define SCSI_CHANGE_DEF   0x40    /* Change Definition (Optional) */
#define SCSI_COMPARE      0x39    /* Compare (O) */
#define SCSI_COPY         0x18    /* Copy (O) */
#define SCSI_COP_VERIFY   0x3A    /* Copy and Verify (O) */
#define SCSI_INQUIRY      0x12    /* Inquiry (MANDATORY) */
#define SCSI_LOG_SELECT   0x4C    /* Log Select (O) */
#define SCSI_LOG_SENSE    0x4D    /* Log Sense (O) */
#define SCSI_MODE_SEL6    0x15    /* Mode Select 6-byte (Device Specific) */
#define SCSI_MODE_SEL10   0x55    /* Mode Select 10-byte (Device Specific) */
#define SCSI_MODE_SEN6    0x1A    /* Mode Sense 6-byte (Device Specific) */
#define SCSI_MODE_SEN10   0x5A    /* Mode Sense 10-byte (Device Specific) */
#define SCSI_READ_BUFF    0x3C    /* Read Buffer (O) */
#define SCSI_REQ_SENSE    0x03    /* Request Sense (MANDATORY) */
#define SCSI_SEND_DIAG    0x1D    /* Send Diagnostic (O) */
#define SCSI_TST_U_RDY    0x00    /* Test Unit Ready (MANDATORY) */
#define SCSI_WRITE_BUFF   0x3B    /* Write Buffer (O) */
/***************************************************************************
 *        %%% Commands Unique to Direct Access Devices %%%
 ***************************************************************************/
#define SCSI_COMPARE      0x39    /* Compare (O) */
#define SCSI_FORMAT       0x04    /* Format Unit (MANDATORY) */
#define SCSI_LCK_UN_CAC   0x36    /* Lock Unlock Cache (O) */
#define SCSI_PREFETCH     0x34    /* Prefetch (O) */
#define SCSI_MED_REMOVL   0x1E    /* Prevent/Allow medium Removal (O) */
#define SCSI_READ6        0x08    /* Read 6-byte (MANDATORY) */
#define SCSI_READ10       0x28    /* Read 10-byte (MANDATORY) */
#define SCSI_RD_CAPAC     0x25    /* Read Capacity (MANDATORY) */
#define SCSI_RD_DEFECT    0x37    /* Read Defect Data (O) */
#define SCSI_READ_LONG    0x3E    /* Read Long (O) */
#define SCSI_REASS_BLK    0x07    /* Reassign Blocks (O) */
#define SCSI_RCV_DIAG     0x1C    /* Receive Diagnostic Results (O) */
#define SCSI_RELEASE      0x17    /* Release Unit (MANDATORY) */
#define SCSI_REZERO       0x01    /* Rezero Unit (O) */
#define SCSI_SRCH_DAT_E   0x31    /* Search Data Equal (O) */
#define SCSI_SRCH_DAT_H   0x30    /* Search Data High (O) */
#define SCSI_SRCH_DAT_L   0x32    /* Search Data Low (O) */
#define SCSI_SEEK6        0x0B    /* Seek 6-Byte (O) */
#define SCSI_SEEK10       0x2B    /* Seek 10-Byte (O) */
#define SCSI_SEND_DIAG    0x1D    /* Send Diagnostics (MANDATORY) */
#define SCSI_SET_LIMIT    0x33    /* Set Limits (O) */
#define SCSI_START_STP    0x1B    /* Start/Stop Unit (O) */
#define SCSI_SYNC_CACHE   0x35    /* Synchronize Cache (O) */
#define SCSI_VERIFY       0x2F    /* Verify (O) */
#define SCSI_WRITE6       0x0A    /* Write 6-Byte (MANDATORY) */
#define SCSI_WRITE10      0x2A    /* Write 10-Byte (MANDATORY) */
#define SCSI_WRT_VERIFY   0x2E    /* Write and Verify (O) */
#define SCSI_WRITE_LONG   0x3F    /* Write Long (O) */
#define SCSI_WRITE_SAME   0x41    /* Write Same (O) */
/****************************************************************************
 * decleration of functions which have to reside in the LowLevel Part Driver
 */
void scsi_print_error(ccb *pccb);
int scsi_exec(ccb *pccb);
void scsi_bus_reset(void);
void scsi_low_level_init(int busdevfunc);
/***************************************************************************
 * functions residing inside cmd_scsi.c
 */
void scsi_init(void);
#define SCSI_IDENTIFY           0xC0  /* not used */
/* Hardware errors  */
#define SCSI_SEL_TIME_OUT       0x00000101   /* Selection time out */
#define SCSI_HNS_TIME_OUT       0x00000102  /* Handshake */
#define SCSI_MA_TIME_OUT        0x00000103  /* Phase error */
#define SCSI_UNEXP_DIS          0x00000104  /* unexpected disconnect */
#define SCSI_INT_STATE          0x00010000  /* unknown Interrupt number is stored in 16 LSB */
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
#endif /* _SCSI_H */