mirror of https://github.com/akuker/RASCSI.git
290 lines
6.2 KiB
C++
290 lines
6.2 KiB
C++
//---------------------------------------------------------------------------
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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 Magneto-Optical Disk]
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//
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//---------------------------------------------------------------------------
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#include "scsimo.h"
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#include "fileio.h"
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#include "exceptions.h"
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SCSIMO::SCSIMO(const set<uint32_t>& sector_sizes, const map<uint64_t, Geometry>& geometries) : Disk("SCMO")
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{
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SetSectorSizes(sector_sizes);
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SetGeometries(geometries);
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}
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void SCSIMO::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 MO 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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// For some priorities there are hard-coded, well-defined sector sizes and block counts
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if (!SetGeometryForCapacity(size)) {
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// Sector size (default 512 bytes) and number of blocks
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SetSectorSizeInBytes(GetConfiguredSectorSize() ? GetConfiguredSectorSize() : 512, true);
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SetBlockCount(size >> GetSectorSizeShiftCount());
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}
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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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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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// Attention if ready
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if (IsReady()) {
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SetAttn(true);
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}
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}
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int SCSIMO::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 FALSE;
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}
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// Basic data
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// buf[0] ... Optical Memory 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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memset(buf, 0, 8);
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buf[0] = 0x07;
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buf[1] = 0x80;
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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 return data
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int size = (buf[4] + 5);
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// Limit the size if the buffer is too 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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void SCSIMO::SetDeviceParameters(BYTE *buf)
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{
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Disk::SetDeviceParameters(buf);
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// MEDIUM TYPE: Optical reversible or erasable
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buf[2] = 0x03;
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}
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void SCSIMO::AddModePages(map<int, vector<BYTE>>& pages, int page, bool changeable) const
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{
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Disk::AddModePages(pages, page, changeable);
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// Page code 6
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if (page == 0x06 || page == 0x3f) {
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AddOptionPage(pages, changeable);
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}
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}
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void SCSIMO::AddOptionPage(map<int, vector<BYTE>>& pages, bool) const
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{
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vector<BYTE> buf(4);
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pages[6] = buf;
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// Do not report update blocks
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}
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bool SCSIMO::ModeSelect(const DWORD *cdb, const BYTE *buf, int length)
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{
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int size;
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ASSERT(length >= 0);
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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 (in 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) || 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 the page
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int 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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// vendor unique format
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case 0x20:
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// just ignore, for now
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break;
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// Other page
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default:
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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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// Vendor Unique Format Page 20h (MO)
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//
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//---------------------------------------------------------------------------
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void SCSIMO::AddVendorPage(map<int, vector<BYTE>>& pages, int page, bool changeable) const
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{
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// Page code 20h
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if (page != 0x20 && page != 0x3f) {
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return;
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}
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vector<BYTE> buf(12);
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// No changeable area
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if (changeable) {
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pages[32] = buf;
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return;
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}
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/*
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mode page code 20h - Vendor Unique Format Page
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format mode XXh type 0
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information: http://h20628.www2.hp.com/km-ext/kmcsdirect/emr_na-lpg28560-1.pdf
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offset description
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02h format mode
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03h type of format (0)
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04~07h size of user band (total sectors?)
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08~09h size of spare band (spare sectors?)
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0A~0Bh number of bands
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actual value of each 3.5inches optical medium (grabbed by Fujitsu M2513EL)
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128M 230M 540M 640M
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---------------------------------------------------
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size of user band 3CBFAh 6CF75h FE45Ch 4BC50h
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size of spare band 0400h 0401h 08CAh 08C4h
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number of bands 0001h 000Ah 0012h 000Bh
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further information: http://r2089.blog36.fc2.com/blog-entry-177.html
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*/
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if (IsReady()) {
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unsigned spare = 0;
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unsigned bands = 0;
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uint64_t blocks = GetBlockCount();
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if (GetSectorSizeInBytes() == 512) {
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switch (blocks) {
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// 128MB
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case 248826:
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spare = 1024;
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bands = 1;
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break;
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// 230MB
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case 446325:
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spare = 1025;
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bands = 10;
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break;
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// 540MB
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case 1041500:
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spare = 2250;
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bands = 18;
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break;
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}
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}
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if (GetSectorSizeInBytes() == 2048) {
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switch (blocks) {
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// 640MB
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case 310352:
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spare = 2244;
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bands = 11;
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break;
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// 1.3GB (lpproj: not tested with real device)
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case 605846:
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spare = 4437;
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bands = 18;
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break;
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}
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}
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buf[2] = 0; // format mode
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buf[3] = 0; // type of format
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buf[4] = (BYTE)(blocks >> 24);
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buf[5] = (BYTE)(blocks >> 16);
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buf[6] = (BYTE)(blocks >> 8);
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buf[7] = (BYTE)blocks;
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buf[8] = (BYTE)(spare >> 8);
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buf[9] = (BYTE)spare;
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buf[10] = (BYTE)(bands >> 8);
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buf[11] = (BYTE)bands;
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}
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pages[32] = buf;
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return;
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}
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