mirror of
https://github.com/akuker/RASCSI.git
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229 lines
5.6 KiB
C++
229 lines
5.6 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) 2001-2006 PI.(ytanaka@ipc-tokai.or.jp)
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// Copyright (C) 2014-2020 GIMONS
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// Copyright (C) akuker
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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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// [ SCSI hard disk ]
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//
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//---------------------------------------------------------------------------
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#include "scsihd.h"
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#include "fileio.h"
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#include "exceptions.h"
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#include <sstream>
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#define DEFAULT_PRODUCT "SCSI HD"
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//===========================================================================
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//
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// SCSI Hard Disk
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//
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//===========================================================================
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SCSIHD::SCSIHD(const set<uint32_t>& sector_sizes, bool removable) : Disk(removable ? "SCRM" : "SCHD")
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{
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SetSectorSizes(sector_sizes);
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}
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void SCSIHD::FinalizeSetup(const Filepath &path, off_t size)
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{
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// 2TB is the current maximum
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if (size > 2LL * 1024 * 1024 * 1024 * 1024) {
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throw io_exception("File size must not exceed 2 TiB");
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}
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// For non-removable media drives set the default product name based on the drive capacity
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if (!IsRemovable()) {
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uint64_t capacity = GetBlockCount() * GetSectorSizeInBytes();
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string unit;
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if (capacity >= 1000000) {
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capacity /= 1000000;
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unit = "MB";
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}
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else {
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capacity /= 1000;
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unit = "KB";
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}
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stringstream product;
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product << DEFAULT_PRODUCT << " " << capacity << " " << unit;
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SetProduct(product.str(), false);
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}
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SetReadOnly(false);
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SetProtectable(true);
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SetProtected(false);
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Disk::Open(path);
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FileSupport::SetPath(path);
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}
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void SCSIHD::Reset()
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{
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// Unlock and release attention
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SetLocked(false);
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SetAttn(false);
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// No reset, clear code
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SetReset(false);
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SetStatusCode(STATUS_NOERROR);
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}
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void SCSIHD::Open(const Filepath& path)
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{
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assert(!IsReady());
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// Open as read-only
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Fileio fio;
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if (!fio.Open(path, Fileio::ReadOnly)) {
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throw file_not_found_exception("Can't open SCSI hard disk file");
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}
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// Get file size
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off_t size = fio.GetFileSize();
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fio.Close();
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// Sector size (default 512 bytes) and number of blocks
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SetSectorSizeInBytes(GetConfiguredSectorSize() ? GetConfiguredSectorSize() : 512, false);
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SetBlockCount((DWORD)(size >> GetSectorSizeShiftCount()));
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// Effective size must be a multiple of the sector size
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size = (size / GetSectorSizeInBytes()) * GetSectorSizeInBytes();
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FinalizeSetup(path, size);
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}
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int SCSIHD::Inquiry(const DWORD *cdb, BYTE *buf)
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{
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// EVPD check
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if (cdb[1] & 0x01) {
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SetStatusCode(STATUS_INVALIDCDB);
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return 0;
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}
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// Basic data
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// buf[0] ... Direct Access Device
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// buf[1] ... Bit 7 set means 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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memset(buf, 0, 8);
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buf[1] = IsRemovable() ? 0x80 : 0x00;
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buf[2] = 0x02;
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buf[3] = 0x02;
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buf[4] = 0x1F;
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// Padded vendor, product, revision
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memcpy(&buf[8], GetPaddedName().c_str(), 28);
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// Size of data that can be returned
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int size = (buf[4] + 5);
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// Limit if the other buffer is small
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if (size > (int)cdb[4]) {
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size = (int)cdb[4];
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}
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return size;
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}
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bool SCSIHD::ModeSelect(const DWORD *cdb, const BYTE *buf, int length)
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{
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assert(length >= 0);
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int size;
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// PF
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if (cdb[1] & 0x10) {
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// Mode Parameter header
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if (length >= 12) {
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// Check the block length bytes
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size = 1 << GetSectorSizeShiftCount();
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if (buf[9] != (BYTE)(size >> 16) ||
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buf[10] != (BYTE)(size >> 8) ||
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buf[11] != (BYTE)size) {
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// currently does not allow changing sector length
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SetStatusCode(STATUS_INVALIDPRM);
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return false;
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}
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buf += 12;
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length -= 12;
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}
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// Parsing the page
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while (length > 0) {
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// Get page
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BYTE page = buf[0];
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switch (page) {
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// format device
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case 0x03:
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// check the number of bytes in the physical sector
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size = 1 << GetSectorSizeShiftCount();
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if (buf[0xc] != (BYTE)(size >> 8) ||
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buf[0xd] != (BYTE)size) {
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// currently does not allow changing sector length
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SetStatusCode(STATUS_INVALIDPRM);
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return false;
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}
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break;
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// CD-ROM Parameters
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// TODO Move to scsicd.cpp
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// According to the SONY CDU-541 manual, Page code 8 is supposed
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// to set the Logical Block Adress Format, as well as the
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// inactivity timer multiplier
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case 0x08:
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// Debug code for Issue #2:
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// https://github.com/akuker/RASCSI/issues/2
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LOGWARN("[Unhandled page code] Received mode page code 8 with total length %d\n ", length);
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for (int i = 0; i<length; i++)
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{
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printf("%02X ", buf[i]);
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}
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printf("\n");
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break;
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// Other page
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default:
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printf("Unknown Mode Select page code received: %02X\n",page);
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break;
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}
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// Advance to the next page
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size = buf[1] + 2;
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length -= size;
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buf += size;
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}
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}
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// Do not generate an error for the time being (MINIX)
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return true;
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}
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//---------------------------------------------------------------------------
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//
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// Add Vendor special page to make drive Apple compatible
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//
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//---------------------------------------------------------------------------
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void SCSIHD::AddVendorPage(map<int, vector<BYTE>>& pages, int page, bool changeable) const
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{
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// Page code 48
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if (page != 0x30 && page != 0x3f) {
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return;
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}
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vector<BYTE> buf(30);
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// No changeable area
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if (!changeable) {
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memcpy(&buf.data()[0xa], "APPLE COMPUTER, INC.", 20);
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}
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pages[48] = buf;
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}
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