ncr5390Lib.c
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上传用户:luoyougen
上传日期:2008-05-12
资源大小:23136k
文件大小:8k
源码类别:
VxWorks
开发平台:
C/C++
- /* ncr5390Lib.c - NCR5390 SCSI-Bus Interface Controller library (SBIC) */
- /* Copyright 1989-1996 Wind River Systems, Inc. */
- #include "copyright_wrs.h"
- /*
- modification history
- --------------------
- 01a,12jul96,dds changed filename from ncr5390.c to ncr5390Lib.c
- 01a,03may96,dds re-written; sample used was wd33c93Lib.c. Old ncr5390Lib.c
- is now in ncr5390Lib1.c
- */
- /*
- DESCRIPTION
- This library contains the main interface routines to the SCSI-Bus
- Interface Controllers (SBIC). These routines simply switch the calls
- to the SCSI-1 or SCSI-2 drivers, implemented in ncr5390Lib1.c or
- ncr5390Lib2.c as configured by the Board Support Package (BSP).
- In order to configure the SCSI-1 driver, which depends upon scsi1Lib, the
- ncr5390CtrlCreate() routine, defined in ncr5390Lib1, must be invoked.
- Similarly ncr5390CtrlCreateScsi2(), defined in ncr5390Lib2 and dependent
- on scsi2Lib, must be called to configure and initialize the SCSI-2 driver.
- INCLUDE FILES
- ncr5390.h, ncr5390_1.h, ncr5390_2.h
- */
- #include "vxWorks.h"
- #include "memLib.h"
- #include "logLib.h"
- #include "scsiLib.h"
- #include "stdlib.h"
- #include "errnoLib.h"
- #include "stdio.h"
- #include "sysLib.h"
- #include "intLib.h"
- #include "tickLib.h"
- #include "taskLib.h"
- #include "msgQLib.h"
- /* data structures */
- typedef struct ncr5390functbl
- {
- FUNCPTR ascCommand;
- FUNCPTR ascIntr;
- FUNCPTR ascRegRead;
- FUNCPTR ascRegWrite;
- FUNCPTR ascXferCountGet;
- FUNCPTR ascXferCountSet;
- FUNCPTR ncr5390CtrlInit;
- FUNCPTR ncr5390Show;
- } SCSIDRV_FUNC_TBL;
- /* globals */
- SCSIDRV_FUNC_TBL *pNcr5390IfTbl;
- /*******************************************************************************
- *
- * ncr5390IfTblInit - create and partially initialize a NCR5390 ASC structure
- *
- * NOMANUAL
- */
- void ncr5390IfTblInit ()
- {
- /* clear allocation to initialize the table */
- pNcr5390IfTbl = calloc (1, sizeof (SCSIDRV_FUNC_TBL));
- }
- /*******************************************************************************
- *
- * ncr5390CtrlInit - initialize the user-specified fields in an ASC structure
- *
- * This routine initializes an ASC structure, after the structure is created
- * with ncr5390CtrlCreate().
- * This structure must be initialized before the ASC can be used.
- * It may be called more than once; however, it should be called only
- * while there is no activity on the SCSI interface.
- *
- * Before returning, this routine pulses RST (reset) on the SCSI bus, thus
- * resetting all attached devices.
- *
- * The input parameters are as follows:
- * .iP <pAsc> 4
- * a pointer to the NCR5390_SCSI_CTRL structure created with
- * ncr5390CtrlCreate().
- * .iP <scsiCtrlBusId>
- * the SCSI bus ID of the ASC, in the range 0 - 7. The ID is somewhat
- * arbitrary; the value 7, or highest priority, is conventional.
- * .iP <defaultSelTimeOut>
- * the timeout, in microseconds, for selecting a SCSI device attached to this
- * controller. This value is used as a default if no timeout is specified in
- * scsiPhysDevCreate(). The recommended value zero (0) specifies
- * SCSI_DEF_SELECT_TIMEOUT (250 millisec). The maximum timeout possible is
- * approximately 2 seconds. Values exceeding this revert to the
- * maximum.
- * .iP <scsiPriority>
- * the priority to which a task is set when performing a SCSI
- * transaction. Valid priorities are 0 to 255. Alternatively, the value -1
- * specifies that the priority should not be altered during SCSI transactions.
- *
- * RETURNS: OK, or ERROR if a parameter is out of range.
- *
- * SEE ALSO: scsiPhysDevCreate(),
- */
- STATUS ncr5390CtrlInit
- (
- FAST int *pAsc, /* ptr to ASC info */
- FAST int scsiCtrlBusId, /* SCSI bus ID of this ASC */
- FAST UINT defaultSelTimeOut, /* default dev. select timeout (microsec) */
- int scsiPriority /* priority of task when doing SCSI I/O */
- )
- {
- if (pNcr5390IfTbl->ncr5390CtrlInit != NULL)
- return ((int) (pNcr5390IfTbl->ncr5390CtrlInit) (pAsc, scsiCtrlBusId,
- defaultSelTimeOut, scsiPriority));
- else
- return ((int) ERROR);
- }
- /*******************************************************************************
- *
- * ascXferCountSet - load the ASC transfer counter with the specified count
- *
- * RETURNS: OK, or ERROR if <count> is not in the
- * range 0 - NCR5390_MAX_BYTES_PER_XFER.
- *
- * NOMANUAL
- */
- int ascXferCountSet
- (
- FAST int *pAsc, /* ptr to ASC info */
- FAST UINT count /* count value to load */
- )
- {
- if (pNcr5390IfTbl->ascXferCountSet != NULL)
- return ((int) (pNcr5390IfTbl->ascXferCountSet) (pAsc, count));
- else
- return ((int) ERROR);
- }
- /*******************************************************************************
- *
- * ascXferCountGet - fetch the ASC transfer count
- *
- * The value of the transfer counter is copied to *pCount.
- *
- * RETURNS: N/A.
- *
- * NOMANUAL
- */
- void ascXferCountGet
- (
- FAST int *pAsc, /* ptr to ASC info */
- FAST int *pCount /* ptr to returned value */
- )
- {
- if (pNcr5390IfTbl->ascXferCountGet != NULL)
- (pNcr5390IfTbl->ascXferCountGet) (pAsc, pCount);
- }
- /*******************************************************************************
- *
- * ascCommand - write a command code to the ASC Command Register
- *
- * RETURNS: N/A.
- *
- * NOMANUAL
- */
- void ascCommand
- (
- int *pAsc, /* ptr to ASC info */
- UINT8 cmdCode /* new command code */
- )
- {
- if (pNcr5390IfTbl->ascCommand != NULL)
- (pNcr5390IfTbl->ascCommand) (pAsc, cmdCode);
- }
- /*******************************************************************************
- *
- * ascIntr - interrupt service routine for the ASC
- *
- * RETURNS: N/A.
- *
- * NOMANUAL
- */
- void ascIntr
- (
- int *pAsc /* ptr to ASC info */
- )
- {
- if (pNcr5390IfTbl->ascIntr != NULL)
- (pNcr5390IfTbl->ascIntr) (pAsc);
- }
- /*******************************************************************************
- *
- * ascRegRead - Get the contents of a specified ASC register
- *
- * RETURNS: N/A.
- *
- * NOMANUAL
- */
- void ascRegRead
- (
- int *pAsc, /* ptr to an ASC structure */
- UINT8 regAdrs, /* register to read */
- int *pDatum /* put data here */
- )
- {
- if (pNcr5390IfTbl->ascRegRead != NULL)
- (pNcr5390IfTbl->ascRegRead) (pAsc, regAdrs, pDatum);
- }
- /*******************************************************************************
- *
- * ascRegWrite - write a value to a specified ASC register
- *
- * RETURNS: N/A.
- *
- * NOMANUAL
- */
- void ascRegWrite
- (
- int *pAsc, /* ptr to an ASC structure */
- UINT8 regAdrs, /* register to write */
- UINT8 datum /* data to write */
- )
- {
- if (pNcr5390IfTbl->ascRegRead != NULL)
- (pNcr5390IfTbl->ascRegRead) (pAsc, regAdrs, datum);
- }
- /*******************************************************************************
- *
- * ncr5390Show - display the values of all readable NCR5390 chip registers
- *
- * This routine displays the state of the ASC registers in a user-friendly
- * manner. It is useful primarily for debugging. It should not be invoked
- * while another running process is accessing the SCSI controller.
- *
- * EXAMPLE:
- * .CS
- * -> ncr5390Show
- * REG #00 (Own ID ) = 0x07
- * REG #01 (Control ) = 0x00
- * REG #02 (Timeout Period ) = 0x20
- * REG #03 (Sectors ) = 0x00
- * REG #04 (Heads ) = 0x00
- * REG #05 (Cylinders MSB ) = 0x00
- * REG #06 (Cylinders LSB ) = 0x00
- * REG #07 (Log. Addr. MSB ) = 0x00
- * REG #08 (Log. Addr. 2SB ) = 0x00
- * REG #09 (Log. Addr. 3SB ) = 0x00
- * REG #0a (Log. Addr. LSB ) = 0x00
- * REG #0b (Sector Number ) = 0x00
- * REG #0c (Head Number ) = 0x00
- * REG #0d (Cyl. Number MSB) = 0x00
- * REG #0e (Cyl. Number LSB) = 0x00
- * REG #0f (Target LUN ) = 0x00
- * REG #10 (Command Phase ) = 0x00
- * REG #11 (Synch. Transfer) = 0x00
- * REG #12 (Xfer Count MSB ) = 0x00
- * REG #13 (Xfer Count 2SB ) = 0x00
- * REG #14 (Xfer Count LSB ) = 0x00
- * REG #15 (Destination ID ) = 0x03
- * REG #16 (Source ID ) = 0x00
- * REG #17 (SCSI Status ) = 0x42
- * REG #18 (Command ) = 0x07
- * .CE
- *
- * RETURNS: OK, or ERROR if <pScsiCtrl> and <pSysScsiCtrl> are both NULL.
- */
- int ncr5390Show
- (
- FAST int *pScsiCtrl /* ptr to SCSI controller info */
- )
- {
- if (pNcr5390IfTbl->ncr5390Show != NULL)
- return ((int) (pNcr5390IfTbl->ncr5390Show) (pScsiCtrl));
- else
- return ((int) ERROR);
- }