Add better floppy MODE page support
[SCSI2SD-V6.git] / src / firmware / mode.c
1 //      Copyright (C) 2013 Michael McMaster <michael@codesrc.com>\r
2 //  Copyright (C) 2014 Doug Brown <doug@downtowndougbrown.com>\r
3 //\r
4 //      This file is part of SCSI2SD.\r
5 //\r
6 //      SCSI2SD is free software: you can redistribute it and/or modify\r
7 //      it under the terms of the GNU General Public License as published by\r
8 //      the Free Software Foundation, either version 3 of the License, or\r
9 //      (at your option) any later version.\r
10 //\r
11 //      SCSI2SD is distributed in the hope that it will be useful,\r
12 //      but WITHOUT ANY WARRANTY; without even the implied warranty of\r
13 //      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
14 //      GNU General Public License for more details.\r
15 //\r
16 //      You should have received a copy of the GNU General Public License\r
17 //      along with SCSI2SD.  If not, see <http://www.gnu.org/licenses/>.\r
18 \r
19 #include "scsi.h"\r
20 #include "mode.h"\r
21 #include "disk.h"\r
22 \r
23 #include <string.h>\r
24 \r
25 static const uint8_t ReadWriteErrorRecoveryPage[] =\r
26 {\r
27 0x01, // Page code\r
28 0x0A, // Page length\r
29 \r
30 // VMS 5.5-2 is very particular regarding the mode page values.\r
31 // The required values for a SCSI2/NoTCQ device are:\r
32 // AWRE=0 ARRE=0 TB=1 RC=0 EER=? PER=1 DTE=1 DCR=?\r
33 // See ftp://www.digiater.nl/openvms/decus/vms94b/net94b/scsi_params_dkdriver.txt\r
34 // X-Newsgroups: comp.os.vms\r
35 // Subject: Re: VMS 6.1 vs. Seagate Disk Drives\r
36 // Message-Id: <32g87h$8q@nntpd.lkg.dec.com>\r
37 // From: weber@evms.enet.dec.com (Ralph O. Weber -- OpenVMS AXP)\r
38 // Date: 12 Aug 1994 16:32:49 GMT\r
39 0x26,\r
40 \r
41 0x00, // Don't try recovery algorithm during reads\r
42 0x00, // Correction span 0\r
43 0x00, // Head offset count 0,\r
44 0x00, // Data strobe offset count 0,\r
45 0x00, // Reserved\r
46 0x00, // Don't try recovery algorithm during writes\r
47 0x00, // Reserved\r
48 0x00, 0x00 // Recovery time limit 0 (use default)*/\r
49 };\r
50 \r
51 static const uint8_t ReadWriteErrorRecoveryPage_SCSI1[] =\r
52 {\r
53 0x01, // Page code\r
54 0x06, // Page length\r
55 0x26,\r
56 0x00, // Don't try recovery algorithm during reads\r
57 0x00, // Correction span 0\r
58 0x00, // Head offset count 0,\r
59 0x00, // Data strobe offset count 0,\r
60 0xFF // Reserved\r
61 };\r
62 \r
63 static const uint8_t DisconnectReconnectPage[] =\r
64 {\r
65 0x02, // Page code\r
66 0x0E, // Page length\r
67 0, // Buffer full ratio\r
68 0, // Buffer empty ratio\r
69 0x00, 10, // Bus inactivity limit, 100us increments. Allow 1ms.\r
70 0x00, 0x00, // Disconnect time limit\r
71 0x00, 0x00, // Connect time limit\r
72 0x00, 0x00, // Maximum burst size\r
73 0x00 ,// DTDC. Not used.\r
74 0x00, 0x00, 0x00 // Reserved\r
75 };\r
76 \r
77 static const uint8_t DisconnectReconnectPage_SCSI1[] =\r
78 {\r
79 0x02, // Page code\r
80 0x0A, // Page length\r
81 0, // Buffer full ratio\r
82 0, // Buffer empty ratio\r
83 0x00, 10, // Bus inactivity limit, 100us increments. Allow 1ms.\r
84 0x00, 0x00, // Disconnect time limit\r
85 0x00, 0x00, // Connect time limit\r
86 0x00, 0x00 // Maximum burst size\r
87 };\r
88 \r
89 static const uint8_t FormatDevicePage[] =\r
90 {\r
91 0x03 | 0x80, // Page code | PS (persist) bit.\r
92 0x16, // Page length\r
93 0x00, 0x00, // Single zone\r
94 0x00, 0x00, // No alternate sectors\r
95 0x00, 0x00, // No alternate tracks\r
96 0x00, 0x00, // No alternate tracks per lun\r
97 0x00, 0x00, // Sectors per track, configurable\r
98 0xFF, 0xFF, // Data bytes per physical sector. Configurable.\r
99 0x00, 0x01, // Interleave\r
100 0x00, 0x00, // Track skew factor\r
101 0x00, 0x00, // Cylinder skew factor\r
102 0xC0, // SSEC(set) HSEC(set) RMB SURF\r
103 0x00, 0x00, 0x00 // Reserved\r
104 };\r
105 \r
106 static const uint8_t RigidDiskDriveGeometry[] =\r
107 {\r
108 0x04, // Page code\r
109 0x16, // Page length\r
110 0xFF, 0xFF, 0xFF, // Number of cylinders\r
111 0x00, // Number of heads (replaced by configured value)\r
112 0xFF, 0xFF, 0xFF, // Starting cylinder-write precompensation\r
113 0xFF, 0xFF, 0xFF, // Starting cylinder-reduced write current\r
114 0x00, 0x1, // Drive step rate (units of 100ns)\r
115 0x00, 0x00, 0x00, // Landing zone cylinder\r
116 0x00, // RPL\r
117 0x00, // Rotational offset\r
118 0x00, // Reserved\r
119 5400 >> 8, 5400 & 0xFF, // Medium rotation rate (RPM)\r
120 0x00, 0x00 // Reserved\r
121 };\r
122 \r
123 static const uint8_t FlexibleDiskDriveGeometry[] =\r
124 {\r
125 0x05, // Page code\r
126 0x1E, // Page length\r
127 0x01, 0xF4, // Transfer Rate (500kbits)\r
128 0x01, // heads\r
129 18, // sectors per track\r
130 0x20,0x00, // bytes per sector\r
131 0x00, 80, // Cylinders\r
132 0x00, 0x80, // Write-precomp\r
133 0x00, 0x80, // reduced current,\r
134 0x00, 0x00, // Drive step rate\r
135 0x00, // pulse width\r
136 0x00, 0x00, // Head settle delay\r
137 0x00, // motor on delay\r
138 0x00,  // motor off delay\r
139 0x00,\r
140 0x00,\r
141 0x00,\r
142 0x00,\r
143 0x00,\r
144 0x00,\r
145 0x00,\r
146 0x00,\r
147 0x00,\r
148 0x00,\r
149 0x00\r
150 };\r
151 \r
152 static const uint8_t RigidDiskDriveGeometry_SCSI1[] =\r
153 {\r
154 0x04, // Page code\r
155 0x12, // Page length\r
156 0xFF, 0xFF, 0xFF, // Number of cylinders\r
157 0x00, // Number of heads (replaced by configured value)\r
158 0xFF, 0xFF, 0xFF, // Starting cylinder-write precompensation\r
159 0xFF, 0xFF, 0xFF, // Starting cylinder-reduced write current\r
160 0x00, 0x1, // Drive step rate (units of 100ns)\r
161 0x00, 0x00, 0x00, // Landing zone cylinder\r
162 0x00, // RPL\r
163 0x00, // Rotational offset\r
164 0x00 // Reserved\r
165 };\r
166 \r
167 static const uint8_t CachingPage[] =\r
168 {\r
169 0x08, // Page Code\r
170 0x0A, // Page length\r
171 0x01, // Read cache disable\r
172 0x00, // No useful rention policy.\r
173 0x00, 0x00, // Pre-fetch always disabled\r
174 0x00, 0x00, // Minimum pre-fetch\r
175 0x00, 0x00, // Maximum pre-fetch\r
176 0x00, 0x00, // Maximum pre-fetch ceiling\r
177 };\r
178 \r
179 // Old CCS SCSI-1 cache page\r
180 static const uint8_t CCSCachingPage[] =\r
181 {\r
182 0x38, // Page Code\r
183 0x0E, // Page length\r
184 0x00, // Read cache disable\r
185 0x00, // Prefetch threshold\r
186 0x00, 0x00, // Max threshold / multiplier\r
187 0x00, 0x00, // Min threshold / multiplier\r
188 0x00, 0x00, // Reserved\r
189 0x00, 0x00,\r
190 0x00, 0x00,\r
191 0x00, 0x00,\r
192 };\r
193 \r
194 static const uint8_t ControlModePage[] =\r
195 {\r
196 0x0A, // Page code\r
197 0x06, // Page length\r
198 0x00, // No logging\r
199 0x01, // Disable tagged queuing\r
200 0x00, // No async event notifications\r
201 0x00, // Reserved\r
202 0x00, 0x00 // AEN holdoff period.\r
203 };\r
204 \r
205 static const uint8_t SequentialDeviceConfigPage[] =\r
206 {\r
207 0x10, // page code\r
208 0x0E, // Page length\r
209 0x00, // CAP, CAF, Active Format\r
210 0x00, // Active partition\r
211 0x00, // Write buffer full ratio\r
212 0x00, // Read buffer empty ratio\r
213 0x00,0x01, // Write delay time, in 100ms units\r
214 0x00, // Default gap size\r
215 0x10, // auto-generation of default eod (end of data)\r
216 0x00,0x00,0x00, // buffer-size at early warning\r
217 0x00, // No data compression\r
218 0x00 // reserved\r
219 };\r
220 \r
221 // Allow Apple 68k Drive Setup to format this drive.\r
222 // Code\r
223 static const uint8_t AppleVendorPage[] =\r
224 {\r
225 0x30, // Page code\r
226 28, // Page length\r
227 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\r
228 'A','P','P','L','E',' ','C','O','M','P','U','T','E','R',',',' ','I','N','C','.'\r
229 };\r
230 \r
231 static void pageIn(int pc, int dataIdx, const uint8_t* pageData, int pageLen)\r
232 {\r
233         memcpy(&scsiDev.data[dataIdx], pageData, pageLen);\r
234 \r
235         if (pc == 0x01) // Mask out (un)changable values\r
236         {\r
237                 memset(&scsiDev.data[dataIdx+2], 0, pageLen - 2);\r
238         }\r
239 }\r
240 \r
241 static void doModeSense(\r
242         int sixByteCmd, int dbd, int pc, int pageCode, int allocLength)\r
243 {\r
244         ////////////// Mode Parameter Header\r
245         ////////////////////////////////////\r
246 \r
247         // Skip the Mode Data Length, we set that last.\r
248         int idx = 1;\r
249         if (!sixByteCmd) ++idx;\r
250 \r
251         uint8_t mediumType = 0;\r
252         uint8_t deviceSpecificParam = 0;\r
253         uint8_t density = 0;\r
254         switch (scsiDev.target->cfg->deviceType)\r
255         {\r
256         case S2S_CFG_FIXED:\r
257         case S2S_CFG_REMOVEABLE:\r
258                 mediumType = 0; // We should support various floppy types here!\r
259                 // Contains cache bits (0) and a Write-Protect bit.\r
260                 deviceSpecificParam =\r
261                         (blockDev.state & DISK_WP) ? 0x80 : 0;\r
262                 density = 0; // reserved for direct access\r
263                 break;\r
264 \r
265         case S2S_CFG_FLOPPY_14MB:\r
266                 mediumType = 0x1E; // 90mm/3.5"\r
267                 deviceSpecificParam =\r
268                         (blockDev.state & DISK_WP) ? 0x80 : 0;\r
269                 density = 0; // reserved for direct access\r
270                 break;\r
271 \r
272         case S2S_CFG_OPTICAL:\r
273                 mediumType = 0x02; // 120mm CDROM, data only.\r
274                 deviceSpecificParam = 0;\r
275                 density = 0x01; // User data only, 2048bytes per sector.\r
276                 break;\r
277 \r
278         case S2S_CFG_SEQUENTIAL:\r
279                 mediumType = 0; // reserved\r
280                 deviceSpecificParam =\r
281                         (blockDev.state & DISK_WP) ? 0x80 : 0;\r
282                 density = 0x13; // DAT Data Storage, X3B5/88-185A \r
283                 break;\r
284 \r
285         case S2S_CFG_MO:\r
286         mediumType = 0x03; // Optical reversible or erasable medium\r
287                 deviceSpecificParam =\r
288                         (blockDev.state & DISK_WP) ? 0x80 : 0;\r
289                 density = 0x00; // Default\r
290                 break;\r
291 \r
292         };\r
293 \r
294         scsiDev.data[idx++] = mediumType;\r
295         scsiDev.data[idx++] = deviceSpecificParam;\r
296 \r
297         if (sixByteCmd)\r
298         {\r
299                 if (dbd)\r
300                 {\r
301                         scsiDev.data[idx++] = 0; // No block descriptor\r
302                 }\r
303                 else\r
304                 {\r
305                         // One block descriptor of length 8 bytes.\r
306                         scsiDev.data[idx++] = 8;\r
307                 }\r
308         }\r
309         else\r
310         {\r
311                 scsiDev.data[idx++] = 0; // Reserved\r
312                 scsiDev.data[idx++] = 0; // Reserved\r
313                 if (dbd)\r
314                 {\r
315                         scsiDev.data[idx++] = 0; // No block descriptor\r
316                         scsiDev.data[idx++] = 0; // No block descriptor\r
317                 }\r
318                 else\r
319                 {\r
320                         // One block descriptor of length 8 bytes.\r
321                         scsiDev.data[idx++] = 0;\r
322                         scsiDev.data[idx++] = 8;\r
323                 }\r
324         }\r
325 \r
326         ////////////// Block Descriptor\r
327         ////////////////////////////////////\r
328         if (!dbd)\r
329         {\r
330                 scsiDev.data[idx++] = density;\r
331                 // Number of blocks\r
332                 // Zero == all remaining blocks shall have the medium\r
333                 // characteristics specified.\r
334                 scsiDev.data[idx++] = 0;\r
335                 scsiDev.data[idx++] = 0;\r
336                 scsiDev.data[idx++] = 0;\r
337 \r
338                 scsiDev.data[idx++] = 0; // reserved\r
339 \r
340                 // Block length\r
341                 uint32_t bytesPerSector = scsiDev.target->liveCfg.bytesPerSector;\r
342                 scsiDev.data[idx++] = bytesPerSector >> 16;\r
343                 scsiDev.data[idx++] = bytesPerSector >> 8;\r
344                 scsiDev.data[idx++] = bytesPerSector & 0xFF;\r
345         }\r
346 \r
347         int pageFound = 0;\r
348 \r
349         if (pageCode == 0x01 || pageCode == 0x3F)\r
350         {\r
351                 pageFound = 1;\r
352                 if ((scsiDev.compatMode >= COMPAT_SCSI2))\r
353                 {\r
354                         pageIn(pc, idx, ReadWriteErrorRecoveryPage, sizeof(ReadWriteErrorRecoveryPage));\r
355                         idx += sizeof(ReadWriteErrorRecoveryPage);\r
356                 }\r
357                 else\r
358                 {\r
359                         pageIn(pc, idx, ReadWriteErrorRecoveryPage_SCSI1, sizeof(ReadWriteErrorRecoveryPage_SCSI1));\r
360                         idx += sizeof(ReadWriteErrorRecoveryPage_SCSI1);\r
361                 }\r
362         }\r
363 \r
364         if (pageCode == 0x02 || pageCode == 0x3F)\r
365         {\r
366                 pageFound = 1;\r
367                 if ((scsiDev.compatMode >= COMPAT_SCSI2))\r
368                 {\r
369                         pageIn(pc, idx, DisconnectReconnectPage, sizeof(DisconnectReconnectPage));\r
370                         idx += sizeof(DisconnectReconnectPage);\r
371                 }\r
372                 else\r
373                 {\r
374                         pageIn(pc, idx, DisconnectReconnectPage_SCSI1, sizeof(DisconnectReconnectPage_SCSI1));\r
375                         idx += sizeof(DisconnectReconnectPage_SCSI1);\r
376                 }\r
377         }\r
378 \r
379         if (pageCode == 0x03 || pageCode == 0x3F)\r
380         {\r
381                 pageFound = 1;\r
382                 pageIn(pc, idx, FormatDevicePage, sizeof(FormatDevicePage));\r
383                 if (pc != 0x01)\r
384                 {\r
385                         uint16_t sectorsPerTrack = scsiDev.target->cfg->sectorsPerTrack;\r
386                         scsiDev.data[idx+10] = sectorsPerTrack >> 8;\r
387                         scsiDev.data[idx+11] = sectorsPerTrack & 0xFF;\r
388 \r
389                         // Fill out the configured bytes-per-sector\r
390                         uint32_t bytesPerSector = scsiDev.target->liveCfg.bytesPerSector;\r
391                         scsiDev.data[idx+12] = bytesPerSector >> 8;\r
392                         scsiDev.data[idx+13] = bytesPerSector & 0xFF;\r
393                 }\r
394                 else\r
395                 {\r
396                         // Set a mask for the changeable values.\r
397                         scsiDev.data[idx+12] = 0xFF;\r
398                         scsiDev.data[idx+13] = 0xFF;\r
399                 }\r
400 \r
401                 idx += sizeof(FormatDevicePage);\r
402         }\r
403 \r
404         if (pageCode == 0x04 || pageCode == 0x3F)\r
405         {\r
406                 pageFound = 1;\r
407                 if ((scsiDev.compatMode >= COMPAT_SCSI2))\r
408                 {\r
409                         pageIn(pc, idx, RigidDiskDriveGeometry, sizeof(RigidDiskDriveGeometry));\r
410                 }\r
411                 else\r
412                 {\r
413                         pageIn(pc, idx, RigidDiskDriveGeometry_SCSI1, sizeof(RigidDiskDriveGeometry_SCSI1));\r
414                 }\r
415 \r
416                 if (pc != 0x01)\r
417                 {\r
418                         // Need to fill out the number of cylinders.\r
419                         uint32_t cyl;\r
420                         uint8_t head;\r
421                         uint32_t sector;\r
422                         LBA2CHS(\r
423                                 getScsiCapacity(\r
424                                         scsiDev.target->cfg->sdSectorStart,\r
425                                         scsiDev.target->liveCfg.bytesPerSector,\r
426                                         scsiDev.target->cfg->scsiSectors),\r
427                                 &cyl,\r
428                                 &head,\r
429                                 &sector,\r
430                                 scsiDev.target->cfg->headsPerCylinder,\r
431                                 scsiDev.target->cfg->sectorsPerTrack);\r
432 \r
433                         scsiDev.data[idx+2] = cyl >> 16;\r
434                         scsiDev.data[idx+3] = cyl >> 8;\r
435                         scsiDev.data[idx+4] = cyl;\r
436 \r
437                         memcpy(&scsiDev.data[idx+6], &scsiDev.data[idx+2], 3);\r
438                         memcpy(&scsiDev.data[idx+9], &scsiDev.data[idx+2], 3);\r
439 \r
440                         scsiDev.data[idx+5] = scsiDev.target->cfg->headsPerCylinder;\r
441                 }\r
442 \r
443                 if ((scsiDev.compatMode >= COMPAT_SCSI2))\r
444                 {\r
445                         idx += sizeof(RigidDiskDriveGeometry);\r
446                 }\r
447                 else\r
448                 {\r
449                         idx += sizeof(RigidDiskDriveGeometry_SCSI1);\r
450                 }\r
451         }\r
452 \r
453         if (pageCode == 0x05 || pageCode == 0x3F)\r
454         {\r
455                 pageFound = 1;\r
456                 pageIn(pc, idx, FlexibleDiskDriveGeometry, sizeof(FlexibleDiskDriveGeometry));\r
457                 idx += sizeof(FlexibleDiskDriveGeometry);\r
458         }\r
459 \r
460         // DON'T output the following pages for SCSI1 hosts. They get upset when\r
461         // we have more data to send than the allocation length provided.\r
462         // (ie. Try not to output any more pages below this comment)\r
463 \r
464 \r
465         if ((scsiDev.compatMode >= COMPAT_SCSI2) &&\r
466                 (pageCode == 0x08 || pageCode == 0x3F))\r
467         {\r
468                 pageFound = 1;\r
469                 pageIn(pc, idx, CachingPage, sizeof(CachingPage));\r
470                 idx += sizeof(CachingPage);\r
471         }\r
472 \r
473         if ((scsiDev.compatMode >= COMPAT_SCSI2)\r
474                 && (pageCode == 0x0A || pageCode == 0x3F))\r
475         {\r
476                 pageFound = 1;\r
477                 pageIn(pc, idx, ControlModePage, sizeof(ControlModePage));\r
478                 idx += sizeof(ControlModePage);\r
479         }\r
480 \r
481         if ((scsiDev.target->cfg->deviceType == S2S_CFG_SEQUENTIAL) &&\r
482                 (pageCode == 0x10 || pageCode == 0x3F))\r
483         {\r
484                 pageFound = 1;\r
485                 pageIn(\r
486                         pc,\r
487                         idx,\r
488                         SequentialDeviceConfigPage,\r
489                         sizeof(SequentialDeviceConfigPage));\r
490                 idx += sizeof(SequentialDeviceConfigPage);\r
491         }\r
492 \r
493         if ((\r
494                         (scsiDev.target->cfg->quirks == S2S_CFG_QUIRKS_APPLE) ||\r
495                         (idx + sizeof(AppleVendorPage) <= allocLength)\r
496                 ) &&\r
497                 (pageCode == 0x30 || pageCode == 0x3F))\r
498         {\r
499                 pageFound = 1;\r
500                 pageIn(pc, idx, AppleVendorPage, sizeof(AppleVendorPage));\r
501                 idx += sizeof(AppleVendorPage);\r
502         }\r
503 \r
504         if (pageCode == 0x38) // Don't send unless requested\r
505         {\r
506                 pageFound = 1;\r
507                 pageIn(pc, idx, CCSCachingPage, sizeof(CCSCachingPage));\r
508                 idx += sizeof(CCSCachingPage);\r
509         }\r
510 \r
511         if (!pageFound)\r
512         {\r
513                 // Unknown Page Code\r
514                 pageFound = 0;\r
515                 scsiDev.status = CHECK_CONDITION;\r
516                 scsiDev.target->sense.code = ILLEGAL_REQUEST;\r
517                 scsiDev.target->sense.asc = INVALID_FIELD_IN_CDB;\r
518                 scsiDev.phase = STATUS;\r
519         }\r
520         else\r
521         {\r
522                 // Go back and fill out the mode data length\r
523                 if (sixByteCmd)\r
524                 {\r
525                         // Cannot currently exceed limits. yay\r
526                         scsiDev.data[0] = idx - 1;\r
527                 }\r
528                 else\r
529                 {\r
530                         scsiDev.data[0] = ((idx - 2) >> 8);\r
531                         scsiDev.data[1] = (idx - 2);\r
532                 }\r
533 \r
534                 scsiDev.dataLen = idx > allocLength ? allocLength : idx;\r
535                 scsiDev.phase = DATA_IN;\r
536         }\r
537 }\r
538 \r
539 \r
540 // Callback after the DATA OUT phase is complete.\r
541 static void doModeSelect(void)\r
542 {\r
543         if (scsiDev.status == GOOD) // skip if we've already encountered an error\r
544         {\r
545                 // scsiDev.dataLen bytes are in scsiDev.data\r
546 \r
547                 int idx;\r
548                 int blockDescLen;\r
549                 if (scsiDev.cdb[0] == 0x55)\r
550                 {\r
551                         blockDescLen =\r
552                                 (((uint16_t)scsiDev.data[6]) << 8) |scsiDev.data[7];\r
553                         idx = 8;\r
554                 }\r
555                 else\r
556                 {\r
557                         blockDescLen = scsiDev.data[3];\r
558                         idx = 4;\r
559                 }\r
560 \r
561                 // The unwritten rule.  Blocksizes are normally set using the\r
562                 // block descriptor value, not by changing page 0x03.\r
563                 if (blockDescLen >= 8)\r
564                 {\r
565                         uint32_t bytesPerSector =\r
566                                 (((uint32_t)scsiDev.data[idx+5]) << 16) |\r
567                                 (((uint32_t)scsiDev.data[idx+6]) << 8) |\r
568                                 scsiDev.data[idx+7];\r
569                         if ((bytesPerSector < MIN_SECTOR_SIZE) ||\r
570                                 (bytesPerSector > MAX_SECTOR_SIZE))\r
571                         {\r
572                                 goto bad;\r
573                         }\r
574                         else\r
575                         {\r
576                                 scsiDev.target->liveCfg.bytesPerSector = bytesPerSector;\r
577                                 if (bytesPerSector != scsiDev.target->cfg->bytesPerSector)\r
578                                 {\r
579                                         s2s_configSave(scsiDev.target->targetId, bytesPerSector);\r
580                                 }\r
581                         }\r
582                 }\r
583                 idx += blockDescLen;\r
584 \r
585                 while (idx < scsiDev.dataLen)\r
586                 {\r
587                         int pageLen = scsiDev.data[idx + 1];\r
588                         if (idx + 2 + pageLen > scsiDev.dataLen) goto bad;\r
589 \r
590                         int pageCode = scsiDev.data[idx] & 0x3F;\r
591                         switch (pageCode)\r
592                         {\r
593                         case 0x03: // Format Device Page\r
594                         {\r
595                                 if (pageLen != 0x16) goto bad;\r
596 \r
597                                 // Fill out the configured bytes-per-sector\r
598                                 uint16_t bytesPerSector =\r
599                                         (((uint16_t)scsiDev.data[idx+12]) << 8) |\r
600                                         scsiDev.data[idx+13];\r
601 \r
602                                 // Sane values only, ok ?\r
603                                 if ((bytesPerSector < MIN_SECTOR_SIZE) ||\r
604                                         (bytesPerSector > MAX_SECTOR_SIZE))\r
605                                 {\r
606                                         goto bad;\r
607                                 }\r
608 \r
609                                 scsiDev.target->liveCfg.bytesPerSector = bytesPerSector;\r
610                                 if (scsiDev.cdb[1] & 1) // SP Save Pages flag\r
611                                 {\r
612                                         s2s_configSave(scsiDev.target->targetId, bytesPerSector);\r
613                                 }\r
614                         }\r
615                         break;\r
616                         //default:\r
617 \r
618                                 // Easiest to just ignore for now. We'll get here when changing\r
619                                 // the SCSI block size via the descriptor header.\r
620                         }\r
621                         idx += 2 + pageLen;\r
622                 }\r
623         }\r
624 \r
625         goto out;\r
626 bad:\r
627         scsiDev.status = CHECK_CONDITION;\r
628         scsiDev.target->sense.code = ILLEGAL_REQUEST;\r
629         scsiDev.target->sense.asc = INVALID_FIELD_IN_PARAMETER_LIST;\r
630 \r
631 out:\r
632         scsiDev.phase = STATUS;\r
633 }\r
634 \r
635 int scsiModeCommand()\r
636 {\r
637         int commandHandled = 1;\r
638 \r
639         uint8_t command = scsiDev.cdb[0];\r
640 \r
641         // We don't currently support the setting of any parameters.\r
642         // (ie. no MODE SELECT(6) or MODE SELECT(10) commands)\r
643 \r
644         if (command == 0x1A)\r
645         {\r
646                 // MODE SENSE(6)\r
647                 int dbd = scsiDev.cdb[1] & 0x08; // Disable block descriptors\r
648                 int pc = scsiDev.cdb[2] >> 6; // Page Control\r
649                 int pageCode = scsiDev.cdb[2] & 0x3F;\r
650                 int allocLength = scsiDev.cdb[4];\r
651 \r
652                 // SCSI1 standard: (CCS X3T9.2/86-52)\r
653                 // "An Allocation Length of zero indicates that no MODE SENSE data shall\r
654                 // be transferred. This condition shall not be considered as an error."\r
655                 doModeSense(1, dbd, pc, pageCode, allocLength);\r
656         }\r
657         else if (command == 0x5A)\r
658         {\r
659                 // MODE SENSE(10)\r
660                 int dbd = scsiDev.cdb[1] & 0x08; // Disable block descriptors\r
661                 int pc = scsiDev.cdb[2] >> 6; // Page Control\r
662                 int pageCode = scsiDev.cdb[2] & 0x3F;\r
663                 int allocLength =\r
664                         (((uint16_t) scsiDev.cdb[7]) << 8) +\r
665                         scsiDev.cdb[8];\r
666                 doModeSense(0, dbd, pc, pageCode, allocLength);\r
667         }\r
668         else if (command == 0x15)\r
669         {\r
670                 // MODE SELECT(6)\r
671                 int len = scsiDev.cdb[4];\r
672                 if (len == 0)\r
673                 {\r
674                         // If len == 0, then transfer no data. From the SCSI 2 standard:\r
675                         //      A parameter list length of zero indicates that no data shall\r
676                         //      be transferred. This condition shall not be considered as an\r
677                         //              error.\r
678                         scsiDev.phase = STATUS;\r
679                 }\r
680                 else\r
681                 {\r
682                         scsiDev.dataLen = len;\r
683                         scsiDev.phase = DATA_OUT;\r
684                         scsiDev.postDataOutHook = doModeSelect;\r
685                 }\r
686         }\r
687         else if (command == 0x55)\r
688         {\r
689                 // MODE SELECT(10)\r
690                 int allocLength = (((uint16_t) scsiDev.cdb[7]) << 8) + scsiDev.cdb[8];\r
691                 if (allocLength == 0)\r
692                 {\r
693                         // If len == 0, then transfer no data. From the SCSI 2 standard:\r
694                         //      A parameter list length of zero indicates that no data shall\r
695                         //      be transferred. This condition shall not be considered as an\r
696                         //              error.\r
697                         scsiDev.phase = STATUS;\r
698                 }\r
699                 else\r
700                 {\r
701                         scsiDev.dataLen = allocLength;\r
702                         scsiDev.phase = DATA_OUT;\r
703                         scsiDev.postDataOutHook = doModeSelect;\r
704                 }\r
705         }\r
706         else\r
707         {\r
708                 commandHandled = 0;\r
709         }\r
710 \r
711         return commandHandled;\r
712 }\r
713 \r