mirror of https://github.com/vivier/EMILE.git
94 lines
1.5 KiB
C
94 lines
1.5 KiB
C
/*
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*
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* (c) 2004, 2005 Laurent Vivier <Laurent@Vivier.EU>
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*
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <scsi/scsi.h>
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#include <macos/types.h>
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#include <macos/errors.h>
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#include <macos/scsi.h>
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#include <macos/lowmem.h>
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#include "libscsi.h"
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#define COMPLETION_TIMEOUT (30*60) /* 30 seconds */
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#define SCSI_BUSY (1 << 6)
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#define SCSI_SEL (1 << 1)
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static inline int scsi_busy(void)
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{
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return (SCSIStat() & (SCSI_BUSY | SCSI_SEL)) != 0;
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}
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static inline int scsi_wait_bus()
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{
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int timeout;
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timeout = Ticks + 300;
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while (scsi_busy())
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if (Ticks > timeout)
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return scsiBusy;
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return noErr;
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}
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int scsi_command(int target, unsigned char* cdb, int count, TIB_t* tib)
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{
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int err;
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short stat;
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short message;
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err = scsi_wait_bus();
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if (err != noErr)
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{
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printf("SCSI bus is busy\n");
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return err;
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}
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err = SCSIGet();
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if (err != noErr)
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{
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printf("Cannot get SCSI bus (%d)\n", err);
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return err;
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}
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err = SCSISelect(target);
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if (err != noErr)
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{
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printf("Cannot select target %d (%d)\n", target, err);
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return err;
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}
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err = SCSICmd(cdb, count);
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if (err != noErr)
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{
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printf("Cannot send command (%d)\n", err);
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goto complete;
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}
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if (tib != NULL)
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{
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err = SCSIRead(tib);
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if ((err != scPhaseErr) && (err != noErr))
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{
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printf("Cannot read data (%d)\n", err);
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goto complete;
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}
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}
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err = SCSIComplete(&stat, &message, COMPLETION_TIMEOUT);
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if (err != noErr)
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return err;
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return noErr;
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complete:
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SCSIComplete(&stat, &message, COMPLETION_TIMEOUT);
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return err;
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}
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