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Add scsi_READ

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This commit is contained in:
Laurent Vivier 2004-12-03 00:14:05 +00:00
parent 079def3b0b
commit 4feec025f2
2 changed files with 57 additions and 10 deletions
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65
second/scsi.c
View File

@ -6,6 +6,7 @@
#include <stdio.h>
#include <malloc.h>
#include <scsi/scsi.h>
#include "bank.h"
#include "misc.h"
#include "glue.h"
@ -63,7 +64,7 @@ int scsi_INQUIRY(int target, char *buffer, size_t count)
char cdb[6];
TIB_t tib[2];
cdb[0] = 0x12;
cdb[0] = INQUIRY;
cdb[1] = 0;
cdb[2] = 0;
cdb[3] = 0;
@ -80,12 +81,56 @@ int scsi_INQUIRY(int target, char *buffer, size_t count)
return scsi_command(target, cdb, 6, tib);
}
#if 0
char cdb[6] = {
0x08, /* READ */
(offset >> 16) & 0x1F,
(offset >> 8) & 0xFF,
offset & 0xFF,
(size + 511) / 512, /* FIXME: blocksize and max is 255 */
0 };
#endif
/******************************************************************************
+=====-========-========-========-========-========-========-========-========+
| 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,
char *buffer, int buffer_size)
{
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);
}

2
second/scsi.h
View File

@ -5,3 +5,5 @@
*/
extern int scsi_INQUIRY(int target, char* buffer, size_t count);
extern int scsi_READ(int target, unsigned long offset, unsigned short nb_blocks,
char *buffer, int buffer_size);