dingusppc/devices/common/adb/adbbus.cpp

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/*
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/>.
*/
/** @file Apple Desktop Bus emulation. */
#include <devices/common/adb/adbbus.h>
#include <devices/common/adb/adbdevice.h>
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#include <devices/deviceregistry.h>
#include <loguru.hpp>
AdbBus::AdbBus(std::string name) {
this->set_name(name);
supports_types(HWCompType::ADB_HOST);
this->devices.clear();
}
void AdbBus::register_device(AdbDevice* dev_obj) {
this->devices.push_back(dev_obj);
}
uint8_t AdbBus::poll() {
for (auto dev : this->devices) {
uint8_t dev_poll = dev->poll();
if (dev_poll) {
return dev_poll;
}
}
return 0;
}
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uint8_t AdbBus::process_command(const uint8_t* in_data, int data_size) {
uint8_t dev_addr, dev_reg;
this->output_count = 0;
if (!data_size)
return ADB_STAT_OK;
uint8_t cmd_byte = in_data[0];
uint8_t cmd = cmd_byte & 0xF;
if(!cmd) { // SendReset
LOG_F(9, "%s: SendReset issued", this->name.c_str());
for (auto dev : this->devices)
dev->reset();
} else if (cmd == 1) { // Flush
dev_addr = cmd_byte >> 4;
LOG_F(9, "%s: Flush issued, dev_addr=0x%X", this->name.c_str(), dev_addr);
} else if ((cmd & 0xC) == 8) { // Listen
dev_addr = cmd_byte >> 4;
dev_reg = cmd_byte & 3;
LOG_F(9, "%s: Listen R%d issued, dev_addr=0x%X", this->name.c_str(),
dev_reg, dev_addr);
this->input_buf = in_data + 1;
this->input_count = data_size - 1;
for (auto dev : this->devices)
dev->listen(dev_addr, dev_reg);
} else if ((cmd & 0xC) == 0xC) { // Talk
dev_addr = cmd_byte >> 4;
dev_reg = cmd_byte & 3;
LOG_F(9, "%s: Talk R%d issued, dev_addr=0x%X", this->name.c_str(),
dev_reg, dev_addr);
this->got_answer = false;
for (auto dev : this->devices) {
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this->got_answer = dev->talk(dev_addr, dev_reg);
if (this->got_answer) {
break;
}
}
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if (!this->got_answer)
return ADB_STAT_TIMEOUT;
} else {
ABORT_F("%s: unsupported ADB command 0x%X", this->name.c_str(), cmd_byte);
}
return ADB_STAT_OK;
}
static const DeviceDescription AdbBus_Descriptor = {
AdbBus::create, {}, {}
};
REGISTER_DEVICE(AdbBus, AdbBus_Descriptor);