Add AdbBus class and device.

devices/common/adb/adbbus.cpp

@@ -0,0 +1,94 @@
+/*
+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/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::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)
+            this->got_answer = dev->talk(dev_addr, dev_reg);
+
+        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);

devices/common/adb/adbbus.h

@@ -0,0 +1,75 @@
+/*
+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 definitions. */
+
+#ifndef ADB_BUS_H
+#define ADB_BUS_H
+
+#include <devices/common/adb/adbdevice.h>
+#include <devices/common/hwcomponent.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#define ADB_MAX_DATA_SIZE   8
+
+/** ADB status. */
+enum {
+    ADB_STAT_OK         = 0,
+    ADB_STAT_SRQ_ACTIVE = 1 << 0,
+    ADB_STAT_TIMEOUT    = 1 << 1,
+};
+
+class AdbDevice; // forward declaration to prevent compiler errors
+
+class AdbBus : public HWComponent {
+public:
+    AdbBus(std::string name);
+    ~AdbBus() = default;
+
+    static std::unique_ptr<HWComponent> create() {
+        return std::unique_ptr<AdbBus>(new AdbBus("ADB-BUS"));
+    }
+
+    void register_device(AdbDevice* dev_obj);
+    uint8_t process_command(const uint8_t* in_data, int data_size);
+    uint8_t get_output_count() { return this->output_count; };
+
+    // callbacks meant to be called by devices
+    const uint8_t*  get_input_buf() { return this->input_buf; };
+    uint8_t*        get_output_buf() { return this->output_buf; };
+    uint8_t         get_input_count() { return this->input_count; };
+    void            set_output_count(uint8_t count) { this->output_count = count; };
+    bool            already_answered() { return this->got_answer; };
+
+private:
+    std::vector<AdbDevice*> devices;
+
+    bool            got_answer = false;
+    const uint8_t*  input_buf = nullptr;
+    uint8_t         output_buf[ADB_MAX_DATA_SIZE] = {};
+    uint8_t         input_count = 0;
+    uint8_t         output_count = 0;
+};
+
+#endif // ADB_BUS_H