mirror of
https://github.com/dingusdev/dingusppc.git
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90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-22 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/** @file SCSI CD-ROM definitions. */
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#ifndef SCSI_CDROM_H
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#define SCSI_CDROM_H
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#include <devices/common/scsi/scsi.h>
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#include <cinttypes>
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#include <fstream>
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#include <memory>
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#include <string>
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/* Original CD-ROM addressing mode expressed
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in minutes, seconds and frames */
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typedef struct {
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int min;
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int sec;
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int frm;
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} AddrMsf;
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/* Descriptor for CD-ROM tracks in TOC */
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typedef struct {
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uint8_t trk_num;
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uint8_t adr_ctrl;
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uint32_t start_lba;
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} TrackDescriptor;
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#define CDROM_MAX_TRACKS 100
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#define LEAD_OUT_TRK_NUM 0xAA
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class ScsiCdrom : public ScsiDevice {
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public:
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ScsiCdrom(int my_id);
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~ScsiCdrom() = default;
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static std::unique_ptr<HWComponent> create() {
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return std::unique_ptr<ScsiCdrom>(new ScsiCdrom(3));
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}
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void insert_image(std::string filename);
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virtual void process_command();
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virtual bool prepare_data();
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protected:
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void read(uint32_t lba, uint16_t transfer_len, uint8_t cmd_len);
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void inquiry();
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void mode_sense();
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void read_toc();
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void read_capacity();
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private:
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AddrMsf lba_to_msf(const int lba);
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private:
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std::fstream cdr_img;
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uint64_t img_size;
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int total_frames;
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int num_tracks;
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int sector_size;
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bool eject_allowed = true;
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int bytes_out = 0;
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TrackDescriptor tracks[CDROM_MAX_TRACKS];
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char data_buf[1 << 18]; // TODO: proper buffer management
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};
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#endif // SCSI_CDROM_H
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