EMILE/libscsi/scsi_READ.c
2007-03-22 17:00:50 +00:00

68 lines
2.8 KiB
C

/*
*
* (c) 2004, 2005 Laurent Vivier <Laurent@lvivier.info>
*
*/
#include <sys/types.h>
#include <scsi/scsi.h>
#include <macos/types.h>
#include <macos/errors.h>
#include "libscsi.h"
/******************************************************************************
+=====-========-========-========-========-========-========-========-========+
| Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|Byte | | | | | | | | |
|=====+=======================================================================|
| 0 | Operation code (28h) |
|-----+-----------------------------------------------------------------------|
| 1 | Logical unit number | DPO | FUA | Reserved | RelAdr |
|-----+-----------------------------------------------------------------------|
| 2 | (MSB) |
|-----+--- ---|
| 3 | |
|-----+--- Logical block address ---|
| 4 | |
|-----+--- ---|
| 5 | (LSB) |
|-----+-----------------------------------------------------------------------|
| 6 | Reserved |
|-----+-----------------------------------------------------------------------|
| 7 | (MSB) |
|-----+--- Transfer length |
| 8 | (LSB) |
|-----+-----------------------------------------------------------------------|
| 9 | Control |
+=============================================================================+
******************************************************************************/
int scsi_READ(int target, unsigned long offset, unsigned short nb_blocks,
void *buffer, int buffer_size)
{
unsigned char cdb[10];
TIB_t tib[2];
cdb[0] = READ_10;
cdb[1] = 0;
cdb[2] = (offset >> 24) & 0xFF;
cdb[3] = (offset >> 16) & 0xFF;
cdb[4] = (offset >> 8) & 0xFF;
cdb[5] = offset & 0xFF;
cdb[6] = 0;
cdb[7] = (nb_blocks >> 8) & 0xFF;
cdb[8] = nb_blocks & 0xFF;
cdb[9] = 0;
tib[0].opcode = op_no_inc;
tib[0].param1 = (int)buffer;
tib[0].param2 = buffer_size;
tib[1].opcode = op_stop;
tib[1].param1 = 0;
tib[1].param2 = 0;
return scsi_command(target, cdb, 10, tib);
}