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SCSI interface

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This commit is contained in:
Laurent Vivier 2005-11-17 06:44:44 +00:00
parent 1d46991bab
commit 7206af2a75
7 changed files with 263 additions and 0 deletions
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17
libscsi/Makefile Normal file
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#
# (c) 2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
#
TOP=$(shell pwd)
CFLAGS = -nostdlib -nodefaultlibs -Wall -Werror -Wno-multichar -fpic -O2
CPPFLAGS = -I$(TOP)/../libmacos -DARCH_M68K
LIBRARY = libscsi.a
SOURCES = scsi_read_sector.c scsi_command.c scsi_INQUIRY.c scsi_READ.c
HEADERS = libscsi.h
all: $(LIBRARY)
include $(TOP)/../Rules.mk

15
libscsi/libscsi.h Normal file
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/*
*
* (c) 2004, 2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
#include <sys/types.h>
#include <macos/scsi.h>
extern int scsi_command(int target, char* cdb, int count, TIB_t* tib);
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);
extern int scsi_read_sector(off_t offset, void* buffer, size_t size);

36
libscsi/scsi_INQUIRY.c Normal file
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/*
*
* (c) 2004, 2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
#include <sys/types.h>
#include <scsi/scsi.h>
#include <macos/types.h>
#include <macos/errors.h>
#include "libscsi.h"
int scsi_INQUIRY(int target, char *buffer, size_t count)
{
char cdb[6];
TIB_t tib[2];
cdb[0] = INQUIRY;
cdb[1] = 0;
cdb[2] = 0;
cdb[3] = 0;
cdb[4] = count;
cdb[5] = 0;
tib[0].opcode = op_no_inc;
tib[0].param1 = (int)buffer;
tib[0].param2 = count;
tib[1].opcode = op_stop;
tib[1].param1 = 0;
tib[1].param2 = 0;
return scsi_command(target, cdb, 6, tib);
}

67
libscsi/scsi_READ.c Normal file
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/*
*
* (c) 2004, 2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
#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,
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);
}

36
libscsi/scsi_READ_CAPACITY.c Normal file
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/*
*
* (c) 2004, 2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
#include <scsi/scsi.h>
#include <macos/types.h>
#include <macos/errors.h>
#include "libscsi.h"
int scsi_INQUIRY(int target, char *buffer, size_t count)
{
char cdb[8];
TIB_t tib[2];
cdb[0] = READ_CAPACITY;
cdb[1] = 0;
cdb[2] = 0;
cdb[3] = 0;
cdb[4] = 0;
cdb[5] = 0;
cdb[6] = 0;
cdb[7] = 0;
tib[0].opcode = op_no_inc;
tib[0].param1 = (int)buffer;
tib[0].param2 = count;
tib[1].opcode = op_stop;
tib[1].param1 = 0;
tib[1].param2 = 0;
return scsi_command(target, cdb, 6, tib);
}

62
libscsi/scsi_command.c Normal file
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/*
*
* (c) 2004, 2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
#include <stdio.h>
#include <scsi/scsi.h>
#include <macos/types.h>
#include <macos/errors.h>
#include "libscsi.h"
#define COMPLETION_TIMEOUT 300
int scsi_command(int target, char* cdb, int count, TIB_t* tib)
{
int err;
short stat;
short message;
err = SCSIGet();
if (err != noErr)
{
printf("Cannot get SCSI bus (%d)\n", err);
return err;
}
err = SCSISelect(target);
if (err != noErr)
{
printf("Cannot select target %d (%d)\n", target, err);
return err;
}
err = SCSICmd(cdb, count);
if (err != noErr)
{
printf("Cannot send command (%d)\n", err);
goto complete;
}
err = SCSIRead(tib);
if (err != noErr)
{
printf("Cannot read data (%d)\n", err);
goto complete;
}
complete:
err = SCSIComplete(&stat, &message, COMPLETION_TIMEOUT);
if (err != noErr)
{
printf("Cannot complete transaction %d %d(%d)\n",
stat, message, err);
return err;
}
return noErr;
}

30
libscsi/scsi_read_sector.c Normal file
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/*
*
* (c) 2004, 2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
#include <sys/types.h>
#include <string.h>
#include <macos/devices.h>
#include "libscsi.h"
#define SECTOR_SIZE (2048)
#define ISO_BLOCKS(X) (((X) / SECTOR_SIZE) + (((X)%SECTOR_SIZE)?1:0))
/* offset is a block number
* size is the number of bytes to read
*/
int scsi_read_sector(off_t offset, void* buffer, size_t size)
{
OSErr err;
err = scsi_READ(3, offset, ISO_BLOCKS(size), buffer, size);
if (err != noErr)
return -1;
return 0;
}