mirror of
https://github.com/akuker/RASCSI.git
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200 lines
6.8 KiB
C
200 lines
6.8 KiB
C
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//---------------------------------------------------------------------------
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//
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// SCSI Target Emulator RaSCSI (*^..^*)
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// for Raspberry Pi
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//
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// Copyright (C) 2020 akuker
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// Copyright (C) 2014-2020 GIMONS
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// Copyright (C) 2001-2006 ＰＩ．(ytanaka@ipc-tokai.or.jp)
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//
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// Licensed under the BSD 3-Clause License.
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// See LICENSE file in the project root folder.
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//
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// [ Emulation of the DaynaPort SCSI Link Ethernet interface ]
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//
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// This design is derived from the SLINKCMD.TXT file, as well as David Kuder's
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// Tiny SCSI Emulator
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// - SLINKCMD: http://www.bitsavers.org/pdf/apple/scsi/dayna/daynaPORT/SLINKCMD.TXT
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// - Tiny SCSI : https://hackaday.io/project/18974-tiny-scsi-emulator
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//
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// Special thanks to @PotatoFi for loaning me his Farallon EtherMac for
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// this development. (Farallon's EtherMac is a re-branded DaynaPort
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// SCSI/Link-T).
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//
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// This does NOT include the file system functionality that is present
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// in the Sharp X68000 host bridge.
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//
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// Note: This requires the DaynaPort SCSI Link driver.
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//---------------------------------------------------------------------------
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#pragma once
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#include "xm6.h"
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#include "os.h"
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#include "disk.h"
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#include "ctapdriver.h"
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//===========================================================================
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//
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// DaynaPort SCSI Link
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//
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//===========================================================================
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class SCSIDaynaPort: public Disk
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{
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public:
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// Basic Functions
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SCSIDaynaPort();
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// Constructor
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virtual ~SCSIDaynaPort();
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// Destructor
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// commands
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int FASTCALL Inquiry(const DWORD *cdb, BYTE *buffer, DWORD major, DWORD minor);
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// INQUIRY command
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BOOL FASTCALL TestUnitReady(const DWORD *cdb);
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// TEST UNIT READY command
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int FASTCALL Read(const DWORD *cdb, BYTE *buf, DWORD block) override;
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// READ command
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BOOL FASTCALL Write(const DWORD *cdb, const BYTE *buf, DWORD block) override;
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// WRITE command
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int FASTCALL WriteCheck(DWORD block) override;
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// WRITE check
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int FASTCALL RetrieveStats(const DWORD *cdb, BYTE *buffer);
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// Retrieve DaynaPort statistics
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BOOL FASTCALL EnableInterface(const DWORD *cdb);
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// Enable/Disable Interface command
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void FASTCALL SetMacAddr(const DWORD *cdb, BYTE *buffer);
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// Set MAC address
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void FASTCALL SetMode(const DWORD *cdb, BYTE *buffer);
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// Set the mode: whether broadcast traffic is enabled or not
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int FASTCALL RequestSense(const DWORD *cdb, BYTE *buf) override;
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static const BYTE CMD_SCSILINK_STATS = 0x09;
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static const BYTE CMD_SCSILINK_ENABLE = 0x0E;
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static const BYTE CMD_SCSILINK_SET = 0x0C;
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static const BYTE CMD_SCSILINK_SETMODE = 0x80;
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static const BYTE CMD_SCSILINK_SETMAC = 0x40;
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private:
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typedef struct __attribute__((packed)) {
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BYTE operation_code;
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BYTE reserved;
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WORD pad;
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BYTE transfer_length;
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BYTE control;
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} scsi_cmd_config_multicast_t;
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typedef struct __attribute__((packed)) {
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BYTE operation_code;
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BYTE reserved;
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BYTE pad2;
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BYTE pad3;
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BYTE pad4;
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BYTE control;
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} scsi_cmd_enable_disable_iface_t;
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typedef struct __attribute__((packed)) {
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BYTE operation_code;
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BYTE misc_cdb_information;
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BYTE logical_block_address;
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WORD length;
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BYTE format;
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} scsi_cmd_daynaport_write_t;
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enum read_data_flags_t : DWORD {
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e_no_more_data = 0x00000000,
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e_more_data_available = 0x00000001,
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e_dropped_packets = 0xFFFFFFFF,
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};
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typedef struct __attribute__((packed)) {
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WORD length;
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read_data_flags_t flags;
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BYTE pad;
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BYTE data[ETH_FRAME_LEN + sizeof(DWORD)]; // Frame length + 4 byte CRC
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} scsi_resp_read_t;
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typedef struct __attribute__((packed)) {
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BYTE mac_address[6];
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DWORD frame_alignment_errors;
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DWORD crc_errors;
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DWORD frames_lost;
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} scsi_resp_link_stats_t;
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static const char* m_vendor_name;
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static const char* m_device_name;
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static const char* m_revision;
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static const char* m_firmware_version;
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scsi_resp_link_stats_t m_scsi_link_stats = {
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.mac_address = { 0x00, 0x80, 0x19, 0x10, 0x98, 0xE3 },//MAC address of @PotatoFi's DayanPort
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.frame_alignment_errors = 0,
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.crc_errors = 0,
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.frames_lost = 0,
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};
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const BYTE m_daynacom_mac_prefix[3] = {0x00,0x80,0x19};
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// Basic data
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// buf[0] ... CD-ROM Device
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// buf[1] ... Removable
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// buf[2] ... SCSI-2 compliant command system
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// buf[3] ... SCSI-2 compliant Inquiry response
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// buf[4] ... Inquiry additional data
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//http://www.bitsavers.org/pdf/apple/scsi/dayna/daynaPORT/pocket_scsiLINK/pocketscsilink_inq.png
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const uint8_t m_target_ethernet_inquiry_response[255] = {
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0x03, 0x00, 0x01, 0x00, // 4 bytes
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0x1E, 0x00, 0x00, 0x00, // 4 bytes
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// Vendor ID (8 Bytes)
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'D','a','y','n','a',' ',' ',' ',
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//'D','A','Y','N','A','T','R','N',
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// Product ID (16 Bytes)
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'S','C','S','I','/','L','i','n',
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'k',' ',' ',' ',' ',' ',' ',' ',
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// Revision Number (4 Bytes)
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'1','.','4','a',
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// Firmware Version (8 Bytes)
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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// Data
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0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, //16 bytes
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0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, //16 bytes
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0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, //16 bytes
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0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, //16 bytes
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0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, //16 bytes
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0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, //16 bytes
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0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x80,0x80,0xBA, //16 bytes
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0x00,0x00,0xC0,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, //16 bytes
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0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, //16 bytes
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0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, //16 bytes
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0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x81, 0x00,0x00,0x00,0x00, //16 bytes
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0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, //16 bytes
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0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, //16 bytes
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0x00,0x00,0x00 //3 bytes
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};
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#if defined(RASCSI) && !defined(BAREMETAL)
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CTapDriver *m_tap;
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// TAP driver
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BOOL m_bTapEnable;
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// TAP valid flag
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BYTE m_mac_addr[6];
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// MAC Address
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static const BYTE m_bcast_addr[6];
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static const BYTE m_apple_talk_addr[6];
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// The READ response has a header which consists of:
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// 2 bytes - payload size
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// 4 bytes - status flags
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// 1 byte - magic pad bit, that I don't know why it works.....
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const DWORD m_read_header_size = 2 + 4 + 1;
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#endif // RASCSI && !BAREMETAL
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};
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