mirror of
https://github.com/dingusdev/dingusppc.git
synced 2024-08-31 10:29:40 +00:00
207 lines
6.6 KiB
C++
207 lines
6.6 KiB
C++
/*
|
|
DingusPPC - The Experimental PowerPC Macintosh emulator
|
|
Copyright (C) 2018-23 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/>.
|
|
*/
|
|
|
|
#include <core/timermanager.h>
|
|
#include <devices/common/scsi/scsi.h>
|
|
#include <loguru.hpp>
|
|
|
|
#include <cinttypes>
|
|
#include <cstring>
|
|
|
|
void ScsiDevice::notify(ScsiMsg msg_type, int param)
|
|
{
|
|
if (msg_type == ScsiMsg::BUS_PHASE_CHANGE) {
|
|
switch (param) {
|
|
case ScsiPhase::RESET:
|
|
LOG_F(9, "ScsiDevice %d: bus reset aknowledged", this->scsi_id);
|
|
break;
|
|
case ScsiPhase::SELECTION:
|
|
// check if something tries to select us
|
|
if (this->bus_obj->get_data_lines() & (1 << scsi_id)) {
|
|
LOG_F(9, "ScsiDevice %d selected", this->scsi_id);
|
|
TimerManager::get_instance()->add_oneshot_timer(
|
|
BUS_SETTLE_DELAY,
|
|
[this]() {
|
|
// don't confirm selection if BSY or I/O are asserted
|
|
if (this->bus_obj->test_ctrl_lines(SCSI_CTRL_BSY | SCSI_CTRL_IO))
|
|
return;
|
|
this->bus_obj->assert_ctrl_line(this->scsi_id, SCSI_CTRL_BSY);
|
|
this->bus_obj->confirm_selection(this->scsi_id);
|
|
this->initiator_id = this->bus_obj->get_initiator_id();
|
|
if (this->bus_obj->test_ctrl_lines(SCSI_CTRL_ATN)) {
|
|
this->switch_phase(ScsiPhase::MESSAGE_OUT);
|
|
} else {
|
|
this->switch_phase(ScsiPhase::COMMAND);
|
|
}
|
|
});
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void ScsiDevice::switch_phase(const int new_phase)
|
|
{
|
|
this->cur_phase = new_phase;
|
|
this->bus_obj->switch_phase(this->scsi_id, this->cur_phase);
|
|
}
|
|
|
|
void ScsiDevice::next_step()
|
|
{
|
|
switch (this->cur_phase) {
|
|
case ScsiPhase::DATA_OUT:
|
|
if (this->data_size >= this->incoming_size) {
|
|
if (this->post_xfer_action != nullptr) {
|
|
this->post_xfer_action();
|
|
}
|
|
this->switch_phase(ScsiPhase::STATUS);
|
|
}
|
|
break;
|
|
case ScsiPhase::DATA_IN:
|
|
if (!this->has_data()) {
|
|
this->switch_phase(ScsiPhase::STATUS);
|
|
}
|
|
break;
|
|
case ScsiPhase::COMMAND:
|
|
this->process_command();
|
|
if (this->cur_phase != ScsiPhase::COMMAND) {
|
|
if (this->prepare_data()) {
|
|
this->bus_obj->assert_ctrl_line(this->scsi_id, SCSI_CTRL_REQ);
|
|
} else {
|
|
ABORT_F("ScsiDevice: prepare_data() failed");
|
|
}
|
|
}
|
|
break;
|
|
case ScsiPhase::STATUS:
|
|
this->switch_phase(ScsiPhase::MESSAGE_IN);
|
|
break;
|
|
case ScsiPhase::MESSAGE_OUT:
|
|
this->switch_phase(ScsiPhase::COMMAND);
|
|
break;
|
|
case ScsiPhase::MESSAGE_IN:
|
|
case ScsiPhase::BUS_FREE:
|
|
this->bus_obj->release_ctrl_lines(this->scsi_id);
|
|
this->switch_phase(ScsiPhase::BUS_FREE);
|
|
break;
|
|
default:
|
|
LOG_F(WARNING, "ScsiDevice: nothing to do for phase %d", this->cur_phase);
|
|
}
|
|
}
|
|
|
|
void ScsiDevice::prepare_xfer(ScsiBus* bus_obj, int& bytes_in, int& bytes_out)
|
|
{
|
|
this->cur_phase = bus_obj->current_phase();
|
|
|
|
switch (this->cur_phase) {
|
|
case ScsiPhase::COMMAND:
|
|
this->data_ptr = this->cmd_buf;
|
|
this->data_size = 0; //bytes_in;
|
|
bytes_out = 0;
|
|
break;
|
|
case ScsiPhase::STATUS:
|
|
this->data_ptr = &this->status;
|
|
this->data_size = 1;
|
|
bytes_out = 1;
|
|
break;
|
|
case ScsiPhase::DATA_IN:
|
|
bytes_out = this->data_size;
|
|
break;
|
|
case ScsiPhase::DATA_OUT:
|
|
break;
|
|
case ScsiPhase::MESSAGE_OUT:
|
|
this->data_ptr = this->msg_buf;
|
|
this->data_size = bytes_in;
|
|
bytes_out = 0;
|
|
break;
|
|
case ScsiPhase::MESSAGE_IN:
|
|
this->data_ptr = this->msg_buf;
|
|
this->data_size = 1;
|
|
bytes_out = 1;
|
|
break;
|
|
default:
|
|
ABORT_F("ScsiDevice: unhandled phase %d in prepare_xfer()", this->cur_phase);
|
|
}
|
|
}
|
|
|
|
static const int CmdGroupLen[8] = {6, 10, 10, -1, -1, 12, -1, -1};
|
|
|
|
int ScsiDevice::xfer_data() {
|
|
this->cur_phase = bus_obj->current_phase();
|
|
|
|
switch (this->cur_phase) {
|
|
case ScsiPhase::MESSAGE_OUT:
|
|
if (this->bus_obj->pull_data(this->initiator_id, this->msg_buf, 1)) {
|
|
if (this->msg_buf[0] & 0x80) {
|
|
LOG_F(9, "%s: IDENTIFY MESSAGE received, code = 0x%X",
|
|
this->name.c_str(), this->msg_buf[0]);
|
|
this->next_step();
|
|
} else {
|
|
ABORT_F("%s: unsupported message received, code = 0x%X",
|
|
this->name.c_str(), this->msg_buf[0]);
|
|
}
|
|
}
|
|
break;
|
|
case ScsiPhase::COMMAND:
|
|
if (this->bus_obj->pull_data(this->initiator_id, this->cmd_buf, 1)) {
|
|
int cmd_len = CmdGroupLen[this->cmd_buf[0] >> 5];
|
|
if (cmd_len < 0) {
|
|
ABORT_F("%s: unsupported command received, code = 0x%X",
|
|
this->name.c_str(), this->msg_buf[0]);
|
|
}
|
|
if (this->bus_obj->pull_data(this->initiator_id, &this->cmd_buf[1], cmd_len - 1))
|
|
this->next_step();
|
|
}
|
|
break;
|
|
default:
|
|
ABORT_F("ScsiDevice: unhandled phase %d in xfer_data()", this->cur_phase);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ScsiDevice::send_data(uint8_t* dst_ptr, const int count)
|
|
{
|
|
if (dst_ptr == nullptr || !count) {
|
|
return 0;
|
|
}
|
|
|
|
int actual_count = std::min(this->data_size, count);
|
|
|
|
std::memcpy(dst_ptr, this->data_ptr, actual_count);
|
|
this->data_ptr += actual_count;
|
|
this->data_size -= actual_count;
|
|
|
|
return actual_count;
|
|
}
|
|
|
|
int ScsiDevice::rcv_data(const uint8_t* src_ptr, const int count)
|
|
{
|
|
// accumulating incoming data in the pre-configured buffer
|
|
std::memcpy(this->data_ptr, src_ptr, count);
|
|
this->data_ptr += count;
|
|
this->data_size += count;
|
|
|
|
if (this->cur_phase == ScsiPhase::COMMAND)
|
|
this->next_step();
|
|
|
|
return count;
|
|
}
|