mirror of https://github.com/vivier/EMILE.git
71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
/*
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*
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* (c) 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 <stdlib.h>
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#include <scsi/scsi.h>
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#include <macos/errors.h>
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#include "libscsi.h"
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#define BUFFER_SIZE (255)
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scsi_device_t *scsi_open(int target)
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{
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scsi_device_t *dev;
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unsigned char buff[BUFFER_SIZE];
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OSErr err;
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int retries;
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err = scsi_INQUIRY(target, buff, BUFFER_SIZE);
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if (err != noErr)
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printf("WARNING: cannot execute INQUIRY\n");
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retries = 0;
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while (retries < 300)
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{
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err = scsi_TEST_UNIT_READY(target);
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retries++;
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if (err == noErr) {
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err = scsi_REQUEST_SENSE(target, buff, BUFFER_SIZE);
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if ((err == noErr) && (buff[2] != UNIT_ATTENTION) &&
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(buff[2] != NOT_READY))
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break;
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}
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}
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if (retries == 300)
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{
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printf("ERROR: unit not ready !\n");
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return NULL;
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}
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retries = 0;
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while (retries < 3)
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{
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err = scsi_READ_CAPACITY(target, buff, BUFFER_SIZE);
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if (err == noErr)
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break;
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retries++;
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}
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if (err != noErr) {
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printf("ERROR: cannot execute READ_CAPACITY\n");
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return NULL;
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}
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dev = (scsi_device_t *)malloc(sizeof(scsi_device_t));
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if (dev == NULL)
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return NULL;
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dev->target = target;
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dev->capacity = (buff[0] << 24) | (buff[1] << 16) | (buff[2] << 8) | buff[3];
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dev->sector_size = (buff[4] << 24) | (buff[5] << 16) | (buff[6] << 8) | buff[7];
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if ((dev->sector_size != 512) && (dev->sector_size != 2048))
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{
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dev->sector_size = 2048;
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}
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return dev;
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}
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