// license:BSD-3-Clause
// copyright-holders:Olivier Galibert
#include "emu.h"
#include "machine/nscsi_hd.h"
#include "imagedev/harddriv.h"
const device_type NSCSI_HARDDISK = device_creator<nscsi_harddisk_device>;
nscsi_harddisk_device::nscsi_harddisk_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
nscsi_full_device(mconfig, NSCSI_HARDDISK, "SCSI HARDDISK", tag, owner, clock, "scsi_harddisk", __FILE__), harddisk(nullptr), lba(0), cur_lba(0), blocks(0), bytes_per_sector(0)
{
}
nscsi_harddisk_device::nscsi_harddisk_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, uint32_t clock, const char *shortname, const char *source) :
nscsi_full_device(mconfig, type, name, tag, owner, clock, shortname, source), harddisk(nullptr), lba(0), cur_lba(0), blocks(0), bytes_per_sector(0)
{
}
void nscsi_harddisk_device::device_start()
{
nscsi_full_device::device_start();
save_item(NAME(block));
save_item(NAME(lba));
save_item(NAME(cur_lba));
save_item(NAME(blocks));
save_item(NAME(bytes_per_sector));
}
void nscsi_harddisk_device::device_reset()
{
nscsi_full_device::device_reset();
harddisk_image_device *hd = subdevice<harddisk_image_device>("image");
harddisk = hd->get_hard_disk_file();
if(!harddisk) {
scsi_id = -1;
bytes_per_sector = 0;
} else {
const hard_disk_info *hdinfo = hard_disk_get_info(harddisk);
bytes_per_sector = hdinfo->sectorbytes;
}
cur_lba = -1;
}
static MACHINE_CONFIG_FRAGMENT(scsi_harddisk)
MCFG_HARDDISK_ADD("image")
MCFG_HARDDISK_INTERFACE("scsi_hdd")
MACHINE_CONFIG_END
machine_config_constructor nscsi_harddisk_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME(scsi_harddisk);
}
uint8_t nscsi_harddisk_device::scsi_get_data(int id, int pos)
{
if(id != 2)
return nscsi_full_device::scsi_get_data(id, pos);
int clba = lba + pos / bytes_per_sector;
if(clba != cur_lba) {
cur_lba = clba;
if(!hard_disk_read(harddisk, cur_lba, block)) {
logerror("%s: HD READ ERROR !\n", tag());
memset(block, 0, sizeof(block));
}
}
return block[pos % bytes_per_sector];
}
void nscsi_harddisk_device::scsi_put_data(int id, int pos, uint8_t data)
{
if(id != 2) {
nscsi_full_device::scsi_put_data(id, pos, data);
return;
}
int offset = pos % bytes_per_sector;
block[offset] = data;
int clba = lba + pos / bytes_per_sector;
if(offset == bytes_per_sector-1) {
if(!hard_disk_write(harddisk, clba, block))
logerror("%s: HD WRITE ERROR !\n", tag());
}
}
void nscsi_harddisk_device::scsi_command()
{
#if 0
if (scsi_cmdbuf[0] != SC_READ)
{
logerror("%s: ", tag());
for (int i = 0; i < 6; i++)
{
logerror("%02x ", scsi_cmdbuf[i]);
}
logerror("\n");
}
#endif
switch(scsi_cmdbuf[0]) {
case SC_TEST_UNIT_READY:
logerror("%s: command TEST UNIT READY\n", tag());
scsi_status_complete(SS_GOOD);
break;
case SC_READ_6:
lba = ((scsi_cmdbuf[1] & 0x1f)<<16) | (scsi_cmdbuf[2]<<8) | scsi_cmdbuf[3];
blocks = scsi_cmdbuf[4];
if(!blocks)
blocks = 256;
logerror("%s: command READ start=%08x blocks=%04x\n",
tag(), lba, blocks);
scsi_data_in(2, blocks*bytes_per_sector);
scsi_status_complete(SS_GOOD);
break;
case SC_WRITE_6:
lba = ((scsi_cmdbuf[1] & 0x1f)<<16) | (scsi_cmdbuf[2]<<8) | scsi_cmdbuf[3];
blocks = scsi_cmdbuf[4];
if(!blocks)
blocks = 256;
logerror("%s: command WRITE start=%08x blocks=%04x\n",
tag(), lba, blocks);
scsi_data_out(2, blocks*bytes_per_sector);
scsi_status_complete(SS_GOOD);
break;
case SC_INQUIRY: {
int lun = get_lun(scsi_cmdbuf[1] >> 5);
logerror("%s: command INQUIRY lun=%d EVPD=%d page=%d alloc=%02x link=%02x\n",
tag(),
lun, scsi_cmdbuf[1] & 1, scsi_cmdbuf[2], scsi_cmdbuf[4], scsi_cmdbuf[5]);
if(lun) {
bad_lun();
return;
}
int page = scsi_cmdbuf[2];
int size = scsi_cmdbuf[4];
switch(page) {
case 0:
memset(scsi_cmdbuf, 0, 148);
scsi_cmdbuf[0] = 0x00; // device is direct-access (e.g. hard disk)
scsi_cmdbuf[1] = 0x00; // media is not removable
scsi_cmdbuf[2] = 0x05; // device complies with SPC-3 standard
scsi_cmdbuf[3] = 0x01; // response data format = CCS
// Apple HD SC setup utility needs to see this
strcpy((char *)&scsi_cmdbuf[8], " SEAGATE");
strcpy((char *)&scsi_cmdbuf[15], " ST225N");
strcpy((char *)&scsi_cmdbuf[31], "1.00");
scsi_cmdbuf[36] = 0x00; // # of extents high
scsi_cmdbuf[37] = 0x08; // # of extents low
scsi_cmdbuf[38] = 0x00; // group 0 commands 0-1f
scsi_cmdbuf[39] = 0x99; // commands 0,3,4,7
scsi_cmdbuf[40] = 0xa0; // commands 8, a
scsi_cmdbuf[41] = 0x27; // commands 12,15,16,17
scsi_cmdbuf[42] = 0x34; // commands 1a,1b,1d
scsi_cmdbuf[43] = 0x01; // group 1 commands 20-3f
scsi_cmdbuf[44] = 0x04;
scsi_cmdbuf[45] = 0xa0;
scsi_cmdbuf[46] = 0x01;
scsi_cmdbuf[47] = 0x18;
scsi_cmdbuf[48] = 0x07; // group 7 commands e0-ff
scsi_cmdbuf[49] = 0x00;
scsi_cmdbuf[50] = 0xa0; // commands 8, a
scsi_cmdbuf[51] = 0x00;
scsi_cmdbuf[52] = 0x00;
scsi_cmdbuf[53] = 0xff; // end of list
if(size > 54)
size = 54;
scsi_data_in(0, size);
break;
}
scsi_status_complete(SS_GOOD);
break;
}
case SC_MODE_SENSE_6: {
int lun = get_lun(scsi_cmdbuf[1] >> 5);
logerror("%s: command MODE SENSE 6 lun=%d page=%02x alloc=%02x link=%02x\n",
tag(),
lun, scsi_cmdbuf[2] & 0x3f, scsi_cmdbuf[4], scsi_cmdbuf[5]);
if(lun) {
bad_lun();
return;
}
int page = scsi_cmdbuf[2] & 0x3f;
int size = scsi_cmdbuf[4];
int pos = 1;
scsi_cmdbuf[pos++] = 0x00; // medium type
scsi_cmdbuf[pos++] = 0x00; // WP, cache
hard_disk_info *info = hard_disk_get_info(harddisk);
uint32_t dsize = info->cylinders * info->heads * info->sectors - 1;
scsi_cmdbuf[pos++] = 0x08; // Block descriptor length
scsi_cmdbuf[pos++] = 0x00;
scsi_cmdbuf[pos++] = (dsize>>16) & 0xff;
scsi_cmdbuf[pos++] = (dsize>>8) & 0xff;
scsi_cmdbuf[pos++] = (dsize & 0xff);
scsi_cmdbuf[pos++] = 0x00;
scsi_cmdbuf[pos++] = (info->sectorbytes>>16)&0xff;
scsi_cmdbuf[pos++] = (info->sectorbytes>>8)&0xff;
scsi_cmdbuf[pos++] = (info->sectorbytes & 0xff);
int pmax = page == 0x3f ? 0x3e : page;
int pmin = page == 0x3f ? 0x00 : page;
for(int page=pmax; page >= pmin; page--) {
switch(page) {
case 0x00: // Unit attention parameters page (weird)
scsi_cmdbuf[pos++] = 0x80; // PS, page id
scsi_cmdbuf[pos++] = 0x02; // Page length
scsi_cmdbuf[pos++] = 0x00; // Meh
scsi_cmdbuf[pos++] = 0x00; // Double meh
break;
case 0x03: { // Format parameters page
scsi_cmdbuf[pos++] = 0x83; // PS, page id
scsi_cmdbuf[pos++] = 0x16; // Page length
scsi_cmdbuf[pos++] = (info->cylinders * info->heads) >> 8; // Track/zone
scsi_cmdbuf[pos++] = info->cylinders * info->heads; // Track/zone
scsi_cmdbuf[pos++] = 0x00; // Alt sect/zone
scsi_cmdbuf[pos++] = 0x00; // Alt sect/zone
scsi_cmdbuf[pos++] = 0x00; // Alt track/zone
scsi_cmdbuf[pos++] = 0x00; // Alt track/zone
scsi_cmdbuf[pos++] = 0x00; // Alt track/volume
scsi_cmdbuf[pos++] = 0x00; // Alt track/volume
scsi_cmdbuf[pos++] = info->sectors >> 8; // Sectors/track
scsi_cmdbuf[pos++] = info->sectors; // Sectors/track
scsi_cmdbuf[pos++] = info->sectorbytes >> 8; // Bytes/sector
scsi_cmdbuf[pos++] = info->sectorbytes; // Bytes/sector
scsi_cmdbuf[pos++] = 0x00; // Interleave
scsi_cmdbuf[pos++] = 0x00; // Interleave
scsi_cmdbuf[pos++] = 0x00; // Track skew
scsi_cmdbuf[pos++] = 0x00; // Track skew
scsi_cmdbuf[pos++] = 0x00; // Cylinder skew
scsi_cmdbuf[pos++] = 0x00; // Cylinder skew
scsi_cmdbuf[pos++] = 0x00; // Sectoring type
scsi_cmdbuf[pos++] = 0x00; // Reserved
scsi_cmdbuf[pos++] = 0x00; // Reserved
scsi_cmdbuf[pos++] = 0x00; // Reserved
break;
}
case 0x04: { // Rigid drive geometry page
scsi_cmdbuf[pos++] = 0x84; // PS, page id
scsi_cmdbuf[pos++] = 0x16; // Page length
scsi_cmdbuf[pos++] = info->cylinders >> 16; // Cylinders
scsi_cmdbuf[pos++] = info->cylinders >> 8; // Cylinders
scsi_cmdbuf[pos++] = info->cylinders; // Cylinders
scsi_cmdbuf[pos++] = info->heads; // Heads
scsi_cmdbuf[pos++] = 0x00; // Starting cylinder - write precomp
scsi_cmdbuf[pos++] = 0x00; // Starting cylinder - write precomp
scsi_cmdbuf[pos++] = 0x00; // Starting cylinder - write precomp
scsi_cmdbuf[pos++] = 0x00; // Starting cylinder - reduced write current
scsi_cmdbuf[pos++] = 0x00; // Starting cylinder - reduced write current
scsi_cmdbuf[pos++] = 0x00; // Starting cylinder - reduced write current
scsi_cmdbuf[pos++] = 0x00; // Drive step rate
scsi_cmdbuf[pos++] = 0x00; // Drive step rate
scsi_cmdbuf[pos++] = 0x00; // Landing zone cylinder
scsi_cmdbuf[pos++] = 0x00; // Landing zone cylinder
scsi_cmdbuf[pos++] = 0x00; // Landing zone cylinder
scsi_cmdbuf[pos++] = 0x00; // RPL
scsi_cmdbuf[pos++] = 0x00; // Rotational offset
scsi_cmdbuf[pos++] = 0x00; // Reserved
scsi_cmdbuf[pos++] = uint8_t(10000 >> 8); // Medium rotation rate
scsi_cmdbuf[pos++] = uint8_t(10000); // Medium rotation rate
scsi_cmdbuf[pos++] = 0x00; // Reserved
scsi_cmdbuf[pos++] = 0x00; // Reserved
break;
}
case 0x30: { // Apple firmware ID page
scsi_cmdbuf[pos++] = 0xb0; // cPS, page id
scsi_cmdbuf[pos++] = 0x16; // Page length
scsi_cmdbuf[pos++] = 'A';
scsi_cmdbuf[pos++] = 'P';
scsi_cmdbuf[pos++] = 'P';
scsi_cmdbuf[pos++] = 'L';
scsi_cmdbuf[pos++] = 'E';
scsi_cmdbuf[pos++] = ' ';
scsi_cmdbuf[pos++] = 'C';
scsi_cmdbuf[pos++] = 'O';
scsi_cmdbuf[pos++] = 'M';
scsi_cmdbuf[pos++] = 'P';
scsi_cmdbuf[pos++] = 'U';
scsi_cmdbuf[pos++] = 'T';
scsi_cmdbuf[pos++] = 'E';
scsi_cmdbuf[pos++] = 'R';
scsi_cmdbuf[pos++] = ',';
scsi_cmdbuf[pos++] = ' ';
scsi_cmdbuf[pos++] = 'I';
scsi_cmdbuf[pos++] = 'N';
scsi_cmdbuf[pos++] = 'C';
scsi_cmdbuf[pos++] = ' ';
scsi_cmdbuf[pos++] = ' ';
scsi_cmdbuf[pos++] = ' ';
break;
}
default:
logerror("%s: mode sense page %02x unhandled\n", tag(), page);
break;
}
}
scsi_cmdbuf[0] = pos;
if(pos > size)
pos = size;
scsi_data_in(0, pos);
scsi_status_complete(SS_GOOD);
break;
}
case SC_START_STOP_UNIT:
logerror("%s: command START STOP UNIT\n", tag());
scsi_status_complete(SS_GOOD);
break;
case SC_READ_CAPACITY: {
logerror("%s: command READ CAPACITY\n", tag());
hard_disk_info *info = hard_disk_get_info(harddisk);
uint32_t size = info->cylinders * info->heads * info->sectors - 1;
scsi_cmdbuf[0] = (size>>24) & 0xff;
scsi_cmdbuf[1] = (size>>16) & 0xff;
scsi_cmdbuf[2] = (size>>8) & 0xff;
scsi_cmdbuf[3] = (size & 0xff);
scsi_cmdbuf[4] = (info->sectorbytes>>24)&0xff;
scsi_cmdbuf[5] = (info->sectorbytes>>16)&0xff;
scsi_cmdbuf[6] = (info->sectorbytes>>8)&0xff;
scsi_cmdbuf[7] = (info->sectorbytes & 0xff);
scsi_data_in(0, 8);
scsi_status_complete(SS_GOOD);
break;
}
case SC_READ_10:
lba = (scsi_cmdbuf[2]<<24) | (scsi_cmdbuf[3]<<16) | (scsi_cmdbuf[4]<<8) | scsi_cmdbuf[5];
blocks = (scsi_cmdbuf[7] << 8) | scsi_cmdbuf[8];
logerror("%s: command READ EXTENDED start=%08x blocks=%04x\n",
tag(), lba, blocks);
scsi_data_in(2, blocks*bytes_per_sector);
scsi_status_complete(SS_GOOD);
break;
case SC_WRITE_10:
lba = (scsi_cmdbuf[2]<<24) | (scsi_cmdbuf[3]<<16) | (scsi_cmdbuf[4]<<8) | scsi_cmdbuf[5];
blocks = (scsi_cmdbuf[7] << 8) | scsi_cmdbuf[8];
logerror("%s: command WRITE EXTENDED start=%08x blocks=%04x\n",
tag(), lba, blocks);
scsi_data_out(2, blocks*bytes_per_sector);
scsi_status_complete(SS_GOOD);
break;
default:
logerror("%s: command %02x ***UNKNOWN***\n", tag(), scsi_cmdbuf[0]);
nscsi_full_device::scsi_command();
break;
}
}