software/scsi2sd-util/ConfigUtil.cc

   1 //      Copyright (C) 2014 Michael McMaster <michael@codesrc.com>
   2 //
   3 //      This file is part of SCSI2SD.
   4 //
   5 //      SCSI2SD is free software: you can redistribute it and/or modify
   6 //      it under the terms of the GNU General Public License as published by
   7 //      the Free Software Foundation, either version 3 of the License, or
   8 //      (at your option) any later version.
   9 //
  10 //      SCSI2SD is distributed in the hope that it will be useful,
  11 //      but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 //      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 //      GNU General Public License for more details.
  14 //
  15 //      You should have received a copy of the GNU General Public License
  16 //      along with SCSI2SD.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 #include "ConfigUtil.hh"
  19
  20 #include <limits>
  21
  22 #include <string.h>
  23
  24
  25 using namespace SCSI2SD;
  26
  27 namespace
  28 {
  29         // Endian conversion routines.
  30         // The Cortex-M3 inside the Cypress PSoC 5LP is a
  31         // little-endian device.
  32
  33         bool isHostLE()
  34         {
  35                 union
  36                 {
  37                         int i;
  38                         char c[sizeof(int)];
  39                 } x;
  40                 x.i = 1;
  41                 return (x.c[0] == 1);
  42         }
  43
  44         uint16_t toLE16(uint16_t in)
  45         {
  46                 if (isHostLE())
  47                 {
  48                         return in;
  49                 }
  50                 else
  51                 {
  52                         return (in >> 8) | (in << 8);
  53                 }
  54         }
  55         uint16_t fromLE16(uint16_t in)
  56         {
  57                 return toLE16(in);
  58         }
  59
  60         uint32_t toLE32(uint32_t in)
  61         {
  62                 if (isHostLE())
  63                 {
  64                         return in;
  65                 }
  66                 else
  67                 {
  68                         return (in >> 24) |
  69                                 ((in >> 8) & 0xff00) |
  70                                 ((in << 8) & 0xff0000) |
  71                                 (in << 24);
  72                 }
  73         }
  74         uint32_t fromLE32(uint32_t in)
  75         {
  76                 return toLE32(in);
  77         }
  78
  79 }
  80
  81 TargetConfig
  82 ConfigUtil::Default(size_t targetIdx)
  83 {
  84         TargetConfig config;
  85         memset(&config, 0, sizeof(config));
  86
  87         config.scsiId = targetIdx;
  88         if (targetIdx == 0)
  89         {
  90                 config.scsiId = config.scsiId | CONFIG_TARGET_ENABLED;
  91         }
  92         config.deviceType = CONFIG_FIXED;
  93
  94         // Default to maximum fail-safe options.
  95         config.flags = 0;// CONFIG_ENABLE_PARITY | CONFIG_ENABLE_UNIT_ATTENTION;
  96         config.deviceTypeModifier = 0;
  97         config.sdSectorStart = 0;
  98
  99         // Default to 2GB. Many systems have trouble with > 2GB disks, and
 100         // a few start to complain at 1GB.
 101         config.scsiSectors = 4194303; // 2GB - 1 sector
 102         config.bytesPerSector = 512;
 103         config.sectorsPerTrack = 63;
 104         config.headsPerCylinder = 255;
 105         memcpy(config.vendor, " codesrc", 8);
 106         memcpy(config.prodId, "         SCSI2SD", 16);
 107         memcpy(config.revision, " 4.2", 4);
 108         memcpy(config.serial, "1234567812345678", 16);
 109
 110         // Reserved fields, already set to 0
 111         // config.reserved
 112
 113         // not supported yet.
 114         // config.vpd
 115
 116         return config;
 117 }
 118
 119
 120 TargetConfig
 121 ConfigUtil::fromBytes(const uint8_t* data)
 122 {
 123         TargetConfig result;
 124         memcpy(&result, data, sizeof(TargetConfig));
 125         result.sdSectorStart = toLE32(result.sdSectorStart);
 126         result.scsiSectors = toLE32(result.scsiSectors);
 127         result.bytesPerSector = toLE16(result.bytesPerSector);
 128         result.sectorsPerTrack = toLE16(result.sectorsPerTrack);
 129         result.headsPerCylinder = toLE16(result.headsPerCylinder);
 130         return result;
 131 }
 132
 133
 134 std::vector<uint8_t>
 135 ConfigUtil::toBytes(const TargetConfig& _config)
 136 {
 137         TargetConfig config(_config);
 138         config.sdSectorStart = fromLE32(config.sdSectorStart);
 139         config.scsiSectors = fromLE32(config.scsiSectors);
 140         config.bytesPerSector = fromLE16(config.bytesPerSector);
 141         config.sectorsPerTrack = fromLE16(config.sectorsPerTrack);
 142         config.headsPerCylinder = fromLE16(config.headsPerCylinder);
 143
 144         const uint8_t* begin = reinterpret_cast<const uint8_t*>(&config);
 145         return std::vector<uint8_t>(begin, begin + sizeof(config));
 146 }
 147
 148 /*
 149 wxXmlNode*
 150 ConfigUtil::toXML(const TargetConfig& config)
 151 {
 152         wxXmlNode* target = new wxXmlNode(wxXML_ELEMENT_NODE, "SCSITarget");
 153
 154         {
 155                 std::stringstream s; s << scsiId & CONFIG_TARGET_ID_BITS;
 156                 target.AddAttribute("id", s.str());
 157         }
 158         {
 159                 std::stringstream s; s << config.deviceType;
 160                 new wxXmlNode(
 161                         new wxXmlNode(target, wxXML_ELEMENT_NODE, "deviceType"),
 162                         wxXML_TEXT_NODE, "", s.str());
 163         }
 164
 165         {
 166                 std::stringstream s; s << "0x" << std::hex << config.deviceTypeModifier;
 167                 new wxXmlNode(
 168                         new wxXmlNode(target, wxXML_ELEMENT_NODE, "deviceTypeModifier"),
 169                         wxXML_TEXT_NODE, "", s.str());
 170         }
 171
 172         wxXmlNode* flags(new wxXmlNode(target, wxXML_ELEMENT_NODE, "flags"));
 173
 174         new wxXmlNode(
 175                 new wxXmlNode(flags, wxXML_ELEMENT_NODE, "enabled"),
 176                 wxXML_TEXT_NODE,
 177                 "",
 178                 config.scsiId & CONFIG_TARGET_ENABLED ? "true" : "false");
 179
 180                                 "<unitAttention>" <<
 181                                         (config.flags & CONFIG_ENABLE_UNIT_ATTENTION ? "true" : "false") <<
 182                                 "</unitAttention>\n" <<
 183                                 "<parity>" <<
 184                                         (config.flags & CONFIG_ENABLE_PARITY ? "true" : "false") <<
 185                                 "</parity>\n" <<
 186
 187                         "<sdSectorStart>" << config.sdSectorStart << "</sdSectorStart>\n" <<
 188                         "<scsiSectors>" << config.scsiSectors << "</scsiSectors>\n" <<
 189                         "<bytesPerSector>" << config.bytesPerSector << "</bytesPerSector>\n" <<
 190                         "<sectorsPerTrack>" << config.sectorsPerTrack<< "</sectorsPerTrack>\n" <<
 191                         "<headsPerCylinder>" << config.headsPerCylinder << "</headsPerCylinder>\n" <<
 192
 193                         "<vendor>" << std::string(config.vendor, 8) << "</vendor>" <<
 194                         "<prodId>" << std::string(config.prodId, 16) << "</prodId>" <<
 195                         "<revision>" << std::string(config.revision, 4) << "</revision>" <<
 196                         "<serial>" << std::string(config.serial, 16) << "</serial>" <<
 197
 198                 "</SCSITarget>";
 199 }
 200
 201 void
 202 ConfigUtil::deserialise(const std::string& in)
 203 {
 204
 205 }
 206 */