dingusppc/devices/common/ata/atabasedevice.h

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/*
DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-23 divingkatae and maximum
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(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/>.
*/
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/** @file Base class for ATA devices. */
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#ifndef ATA_BASE_DEVICE_H
#define ATA_BASE_DEVICE_H
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#include <devices/common/ata/atadefs.h>
#include <devices/common/hwcomponent.h>
#include "endianswap.h"
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#include <cinttypes>
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#include <string>
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class IdeChannel;
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class AtaBaseDevice : public HWComponent, public AtaInterface
{
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public:
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AtaBaseDevice(const std::string name, uint8_t type);
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~AtaBaseDevice() = default;
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void set_host(IdeChannel* host) { this->host_obj = host; };
uint16_t read(const uint8_t reg_addr) override;
void write(const uint8_t reg_addr, const uint16_t value) override;
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virtual int perform_command() = 0;
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int get_device_id() override { return this->my_dev_id; };
void pdiag_callback() override {
this->r_error &= 0x7F;
};
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virtual void device_reset(bool is_soft_reset);
virtual void device_set_signature();
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void device_control(const uint8_t new_ctrl);
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void update_intrq(uint8_t new_intrq_state);
void signal_data_ready();
bool has_data() {
return data_ptr && xfer_cnt;
}
uint16_t get_data() {
return BYTESWAP_16(*this->data_ptr++);
}
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protected:
bool is_selected() { return ((this->r_dev_head >> 4) & 1) == this->my_dev_id; };
uint8_t my_dev_id = 0; // my IDE device ID configured by the host
uint8_t device_type = ata_interface::DEVICE_TYPE_UNKNOWN;
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uint8_t intrq_state = 0; // INTRQ deasserted
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IdeChannel* host_obj = nullptr;
// IDE aka task file registers
uint8_t r_error;
uint8_t r_features;
uint8_t r_sect_count;
uint8_t r_sect_num;
uint8_t r_cylinder_lo;
uint8_t r_cylinder_hi;
uint8_t r_dev_head;
uint8_t r_command;
uint8_t r_status;
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uint8_t r_status_save;
uint8_t r_dev_ctrl = 0x08;
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uint16_t *data_ptr = nullptr;
uint8_t data_buf[512] = {};
int xfer_cnt = 0;
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};
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#endif // ATA_BASE_DEVICE_H