Basic CD-ROM mode page 0x2A support.

lib/SCSI2SD/src/firmware/mode.c

@@ -514,6 +514,8 @@ static void doModeSense(
 		idx += sizeof(SequentialDeviceConfigPage);
 	}
 
+	idx += modeSenseCDCapabilitiesPage(pc, idx, pageCode, &pageFound);
+
 	if ((
 			(scsiDev.target->cfg->quirks == S2S_CFG_QUIRKS_APPLE) ||
 			(idx + sizeof(AppleVendorPage) <= allocLength)

src/BlueSCSI_mode.cpp

@@ -62,6 +62,39 @@ static const uint8_t CDROMAudioControlParametersPage[] =
 };
 #endif
 
+// 0x2A CD-ROM Capabilities and Mechanical Status Page
+// This seems to have been standardized in MMC-1 but was de-facto present in
+// earlier SCSI-2 drives. The below mirrors one of those earlier SCSI-2
+// implementations, being is slightly shorter than the spec format but
+// otherwise returning identical information within the same bytes.
+static const uint8_t CDROMCapabilitiesPage[] =
+{
+0x2A, // page code
+0x0E, // page length
+0x00, // CD-R/RW reading not supported
+0x00, // CD-R/RW writing not supported
+#ifdef ENABLE_AUDIO_OUTPUT
+0x01, // byte 4: audio play supported
+#else
+0x00, // byte 4: no features supported
+#endif
+0x03, // byte 5: CD-DA ok with accurate streaming, no other features
+0x40, // byte 6: tray loader, ejection ok, but prevent/allow not supported
+#ifdef ENABLE_AUDIO_OUTPUT
+0x03, // byte 7: separate channel mute and volumes
+#else
+0x00, // byte 7: no features supported
+#endif
+0x05, 0x62, // max read speed, state (8X, ~1378KB/s)
+#ifdef ENABLE_AUDIO_OUTPUT
+0x01, 0x00,  // 256 volume levels supported
+#else
+0x00, 0x00,  // no volume levels supported
+#endif
+0x00, 0x40, // read buffer (64KB)
+0x05, 0x62, // current read speed, matching max speed
+};
+
 static void pageIn(int pc, int dataIdx, const uint8_t* pageData, int pageLen)
 {
     memcpy(&scsiDev.data[dataIdx], pageData, pageLen);
@@ -144,6 +177,25 @@ int modeSenseCDAudioControlPage(int pc, int idx, int pageCode, int* pageFound)
 #endif
 }
 
+int modeSenseCDCapabilitiesPage(int pc, int idx, int pageCode, int* pageFound)
+{
+    if ((scsiDev.target->cfg->deviceType == S2S_CFG_OPTICAL)
+        && (pageCode == 0x2A || pageCode == 0x3F))
+    {
+        *pageFound = 1;
+        pageIn(
+            pc,
+            idx,
+            CDROMCapabilitiesPage,
+            sizeof(CDROMCapabilitiesPage));
+        return sizeof(CDROMCapabilitiesPage);
+    }
+    else
+    {
+        return 0;
+    }
+}
+
 extern "C"
 int modeSelectCDAudioControlPage(int pageLen, int idx)
 {

src/BlueSCSI_mode.h

@@ -23,5 +23,6 @@
 
 int modeSenseCDDevicePage(int pc, int idx, int pageCode, int* pageFound);
 int modeSenseCDAudioControlPage(int pc, int idx, int pageCode, int* pageFound);
+int modeSenseCDCapabilitiesPage(int pc, int idx, int pageCode, int* pageFound);
 
 int modeSelectCDAudioControlPage(int pageLen, int idx);