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Wait bus is not busy

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This commit is contained in:
Laurent Vivier 2006-10-30 21:52:58 +00:00
parent 6df85e6083
commit 5eb95f1419
1 changed files with 28 additions and 0 deletions
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28
libscsi/scsi_command.c
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@ -11,17 +11,45 @@
#include <macos/types.h>
#include <macos/errors.h>
#include <macos/scsi.h>
#include <macos/lowmem.h>
#include "libscsi.h"
#define COMPLETION_TIMEOUT 300
#define SCSI_BUSY (1 << 6)
#define SCSI_SEL (1 << 1)
static inline int scsi_busy(void)
{
return (SCSIStat() & (SCSI_BUSY | SCSI_SEL)) != 0;
}
static inline int scsi_wait_bus()
{
int timeout;
timeout = Ticks + 300;
while (scsi_busy())
if (Ticks > timeout)
return scsiBusy;
return noErr;
}
int scsi_command(int target, char* cdb, int count, TIB_t* tib)
{
int err;
short stat;
short message;
err = scsi_wait_bus();
if (err != noErr)
{
printf("SCSI bus is busy\n");
return err;
}
err = SCSIGet();
if (err != noErr)
{