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dingusppc/devices/common/scsi/scsicdrom.cpp
joevt 45a9d45e3f Add SCSI devices. 
scsibus has a new method attach_scsi_devices which is used by all machines to populate a SCSI bus with one or more hard drives or CD-ROM drives.

HDDs are specified by the hdd_img property.
CDs are specified by the cdr_img property.
Multiple images are delimited by a colon :

attach_scsi_devices is called by the scsi controller after the scsi controller has attached itself to the scsi bus.
The bus suffix is applied to the property name.
Curio has no suffix so it will use hdd_img and cdr_img properties.
Mesh is expected to have a suffix of 2 so it will use hdd_img2 and cdr_img2 properties.

HDDs will skip SCSI ID 3 unless 7 HDDs are added, in which case, the seventh HDD will use ID 3.
CDs will start at SCSI ID 3, go to 7, then down to 0.
SCSI IDs are skipped if a device is already using that SCSI ID.

ScsiCdrom and ScsiHD no longer use REGISTER_DEVICE or DeviceDescription or PropMap which is normal for devices that can have multiple instances.
2024-03-14 19:12:11 -07:00

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/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-24 divingkatae and maximum
(theweirdo) spatium
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/** @file SCSI CD-ROM emulation. */
#include <devices/common/scsi/scsi.h>
#include <devices/common/scsi/scsicdrom.h>
#include <devices/deviceregistry.h>
#include <loguru.hpp>
#include <machines/machineproperties.h>
#include <memaccess.h>
#include <cinttypes>
#include <cstring>
using namespace std;
static char cdrom_vendor_sony_id[] = "SONY ";
static char cdu8003a_product_id[] = "CD-ROM CDU-8003A";
static char cdu8003a_revision_id[] = "1.9a";
ScsiCdrom::ScsiCdrom(std::string name, int my_id) : CdromDrive(), ScsiDevice(name, my_id)
{
this->pre_xfer_action = nullptr;
this->post_xfer_action = nullptr;
}
void ScsiCdrom::process_command()
{
uint32_t lba, xfer_len;
this->pre_xfer_action = nullptr;
this->post_xfer_action = nullptr;
// assume successful command execution
this->status = ScsiStatus::GOOD;
// use internal data buffer by default
this->data_ptr = this->data_buf;
uint8_t* cmd = this->cmd_buf;
switch (cmd[0]) {
case ScsiCommand::TEST_UNIT_READY:
this->test_unit_ready();
break;
case ScsiCommand::REWIND:
this->illegal_command(cmd);
break;
case ScsiCommand::REQ_SENSE:
this->illegal_command(cmd);
break;
case ScsiCommand::FORMAT_UNIT:
this->illegal_command(cmd);
break;
case ScsiCommand::READ_BLK_LIMITS:
this->illegal_command(cmd);
break;
case ScsiCommand::READ_6:
lba = ((cmd[1] & 0x1F) << 16) + (cmd[2] << 8) + cmd[3];
this->read(lba, cmd[4], 6);
break;
case ScsiCommand::WRITE_6:
this->illegal_command(cmd);
break;
case ScsiCommand::SEEK_6:
this->illegal_command(cmd);
break;
case ScsiCommand::INQUIRY:
this->inquiry();
break;
case ScsiCommand::VERIFY_6:
this->illegal_command(cmd);
break;
case ScsiCommand::MODE_SELECT_6:
this->incoming_size = cmd[4];
this->switch_phase(ScsiPhase::DATA_OUT);
break;
case ScsiCommand::RELEASE_UNIT:
this->illegal_command(cmd);
break;
case ScsiCommand::ERASE_6:
this->illegal_command(cmd);
break;
case ScsiCommand::MODE_SENSE_6:
this->mode_sense();
break;
case ScsiCommand::START_STOP_UNIT:
this->illegal_command(cmd);
break;
case ScsiCommand::DIAG_RESULTS:
this->illegal_command(cmd);
break;
case ScsiCommand::SEND_DIAGS:
this->illegal_command(cmd);
break;
case ScsiCommand::PREVENT_ALLOW_MEDIUM_REMOVAL:
this->eject_allowed = (cmd[4] & 1) == 0;
this->switch_phase(ScsiPhase::STATUS);
break;
case ScsiCommand::READ_CAPACITY_10:
this->read_capacity_10();
break;
case ScsiCommand::READ_10:
lba = READ_DWORD_BE_U(&cmd[2]);
xfer_len = READ_WORD_BE_U(&cmd[7]);
if (cmd[1] & 1) {
ABORT_F("%s: RelAdr bit set in READ_10", this->name.c_str());
}
read(lba, xfer_len, 10);
break;
case ScsiCommand::WRITE_10:
this->illegal_command(cmd);
break;
case ScsiCommand::VERIFY_10:
this->illegal_command(cmd);
break;
case ScsiCommand::READ_LONG_10:
this->illegal_command(cmd);
break;
case ScsiCommand::MODE_SENSE_10:
this->illegal_command(cmd);
break;
case ScsiCommand::READ_12:
this->illegal_command(cmd);
break;
// CD-ROM specific commands
case ScsiCommand::READ_TOC:
this->read_toc();
break;
case ScsiCommand::SET_CD_SPEED:
this->illegal_command(cmd);
break;
case ScsiCommand::READ_CD:
this->illegal_command(cmd);
break;
default:
this->illegal_command(cmd);
}
}
bool ScsiCdrom::prepare_data()
{
switch (this->cur_phase) {
case ScsiPhase::DATA_IN:
this->data_size = this->bytes_out;
break;
case ScsiPhase::DATA_OUT:
this->data_size = 0;
break;
case ScsiPhase::STATUS:
break;
default:
LOG_F(WARNING, "%s: unexpected phase in prepare_data", this->name.c_str());
return false;
}
return true;
}
bool ScsiCdrom::get_more_data() {
if (this->data_left()) {
this->data_size = this->read_more();
this->data_ptr = (uint8_t *)this->data_cache.get();
}
return this->data_size != 0;
}
void ScsiCdrom::read(const uint32_t lba, uint16_t nblocks, const uint8_t cmd_len)
{
if (cmd_len == 6 && nblocks == 0)
nblocks = 256;
this->set_fpos(lba);
this->data_ptr = (uint8_t *)this->data_cache.get();
this->bytes_out = this->read_begin(nblocks, UINT32_MAX);
this->msg_buf[0] = ScsiMessage::COMMAND_COMPLETE;
this->switch_phase(ScsiPhase::DATA_IN);
}
int ScsiCdrom::test_unit_ready()
{
this->switch_phase(ScsiPhase::STATUS);
return ScsiError::NO_ERROR;
}
void ScsiCdrom::inquiry() {
int page_num = cmd_buf[2];
int alloc_len = cmd_buf[4];
if (page_num) {
ABORT_F("%s: invalid page number in INQUIRY", this->name.c_str());
}
if (alloc_len > 36) {
LOG_F(WARNING, "%s: more than 36 bytes requested in INQUIRY", this->name.c_str());
}
this->data_buf[0] = 5; // device type: CD-ROM
this->data_buf[1] = 0x80; // removable media
this->data_buf[2] = 2; // ANSI version: SCSI-2
this->data_buf[3] = 1; // response data format
this->data_buf[4] = 0x1F; // additional length
this->data_buf[5] = 0;
this->data_buf[6] = 0;
this->data_buf[7] = 0x18; // supports synchronous xfers and linked commands
std::memcpy(&this->data_buf[8], cdrom_vendor_sony_id, 8);
std::memcpy(&this->data_buf[16], cdu8003a_product_id, 16);
std::memcpy(&this->data_buf[32], cdu8003a_revision_id, 4);
this->bytes_out = 36;
this->msg_buf[0] = ScsiMessage::COMMAND_COMPLETE;
this->switch_phase(ScsiPhase::DATA_IN);
}
static char Apple_Copyright_Page_Data[] = "APPLE COMPUTER, INC ";
void ScsiCdrom::mode_sense()
{
uint8_t page_code = this->cmd_buf[2] & 0x3F;
uint8_t alloc_len = this->cmd_buf[4];
int num_blocks = this->size_blocks;
this->data_buf[ 0] = 13; // initial data size
this->data_buf[ 1] = 0; // medium type
this->data_buf[ 2] = 0x80; // medium is write protected
this->data_buf[ 3] = 8; // block description length
this->data_buf[ 4] = 0; // density code
this->data_buf[ 5] = (num_blocks >> 16) & 0xFFU;
this->data_buf[ 6] = (num_blocks >> 8) & 0xFFU;
this->data_buf[ 7] = (num_blocks ) & 0xFFU;
this->data_buf[ 8] = 0;
this->data_buf[ 9] = 0;
this->data_buf[10] = (this->block_size >> 8) & 0xFFU;
this->data_buf[11] = (this->block_size ) & 0xFFU;
this->data_buf[12] = page_code;
switch (page_code) {
case 0x01:
this->data_buf[13] = 6; // data size
std::memset(&this->data_buf[14], 0, 6);
this->data_buf[0] += 7;
break;
case 0x30:
this->data_buf[13] = 22; // data size
std::memcpy(&this->data_buf[14], Apple_Copyright_Page_Data, 22);
this->data_buf[0] += 23;
break;
case 0x31:
this->data_buf[13] = 6; // data size
std::memset(&this->data_buf[14], 0, 6);
this->data_buf[14] = '.';
this->data_buf[15] = 'A';
this->data_buf[16] = 'p';
this->data_buf[17] = 'p';
break;
default:
ABORT_F("%s: unsupported page %d in MODE_SENSE_6", this->name.c_str(), page_code);
}
this->bytes_out = this->data_buf[0];
this->msg_buf[0] = ScsiMessage::COMMAND_COMPLETE;
this->switch_phase(ScsiPhase::DATA_IN);
}
void ScsiCdrom::read_toc()
{
int tot_tracks;
uint8_t start_track = this->cmd_buf[6];
uint16_t alloc_len = (this->cmd_buf[7] << 8) + this->cmd_buf[8];
bool is_msf = !!(this->cmd_buf[1] & 2);
if (this->cmd_buf[2] & 0xF) {
ABORT_F("%s: unsupported format in READ_TOC", this->name.c_str());
}
if (!alloc_len) {
LOG_F(WARNING, "%s: zero allocation length passed to READ_TOC", this->name.c_str());
return;
}
if (!start_track) { // special case: track zero (lead-in) as starting track
// return all tracks starting with track 1 plus lead-out
start_track = 1;
tot_tracks = this->num_tracks + 1;
} else if (start_track == LEAD_OUT_TRK_NUM) {
start_track = this->num_tracks + 1;
tot_tracks = 1;
} else if (start_track <= this->num_tracks) {
tot_tracks = (this->num_tracks - start_track) + 2;
} else {
LOG_F(ERROR, "%s: invalid starting track %d in READ_TOC", this->name.c_str(),
start_track);
this->status = ScsiStatus::CHECK_CONDITION;
this->sense = ScsiSense::ILLEGAL_REQ;
this->switch_phase(ScsiPhase::STATUS);
return;
}
uint8_t* buf_ptr = this->data_buf;
int data_len = (tot_tracks * 8) + 2;
// write TOC data header
*buf_ptr++ = (data_len >> 8) & 0xFFU;
*buf_ptr++ = (data_len >> 0) & 0xFFU;
*buf_ptr++ = 1; // 1st track number
*buf_ptr++ = this->num_tracks; // last track number
for (int tx = 0; tx < tot_tracks; tx++) {
if ((buf_ptr - this->data_buf + 8) > alloc_len)
break; // exit the loop if the output buffer length is exhausted
TrackDescriptor& td = this->tracks[start_track + tx - 1];
*buf_ptr++ = 0; // reserved
*buf_ptr++ = td.adr_ctrl;
*buf_ptr++ = td.trk_num;
*buf_ptr++ = 0; // reserved
if (is_msf) {
AddrMsf msf = lba_to_msf(td.start_lba + 150);
*buf_ptr++ = 0; // reserved
*buf_ptr++ = msf.min;
*buf_ptr++ = msf.sec;
*buf_ptr++ = msf.frm;
} else {
*buf_ptr++ = (td.start_lba >> 24) & 0xFFU;
*buf_ptr++ = (td.start_lba >> 16) & 0xFFU;
*buf_ptr++ = (td.start_lba >> 8) & 0xFFU;
*buf_ptr++ = (td.start_lba >> 0) & 0xFFU;
}
}
this->bytes_out = alloc_len;
this->msg_buf[0] = ScsiMessage::COMMAND_COMPLETE;
this->switch_phase(ScsiPhase::DATA_IN);
}
void ScsiCdrom::read_capacity_10()
{
uint32_t lba = READ_DWORD_BE_U(&this->cmd_buf[2]);
if (this->cmd_buf[1] & 1) {
ABORT_F("%s: RelAdr bit set in READ_CAPACITY_10", this->name.c_str());
}
if (!(this->cmd_buf[8] & 1) && lba) {
LOG_F(ERROR, "%s: non-zero LBA for PMI=0", this->name.c_str());
this->status = ScsiStatus::CHECK_CONDITION;
this->sense = ScsiSense::ILLEGAL_REQ;
this->switch_phase(ScsiPhase::STATUS);
return;
}
int last_lba = this->size_blocks - 1;
this->data_buf[0] = (last_lba >> 24) & 0xFFU;
this->data_buf[1] = (last_lba >> 16) & 0xFFU;
this->data_buf[2] = (last_lba >> 8) & 0xFFU;
this->data_buf[3] = (last_lba >> 0) & 0xFFU;
this->data_buf[4] = 0;
this->data_buf[5] = 0;
this->data_buf[6] = (this->block_size >> 8) & 0xFFU;
this->data_buf[7] = this->block_size & 0xFFU;
this->bytes_out = 8;
this->msg_buf[0] = ScsiMessage::COMMAND_COMPLETE;
this->switch_phase(ScsiPhase::DATA_IN);
}
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