2 * Copyright (c) 1998,1999,2000,2001,2002 Søren Schmidt <sos@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer,
10 * without modification, immediately at the beginning of the file.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * $FreeBSD: src/sys/dev/ata/atapi-all.c,v 1.46.2.18 2002/10/31 23:10:33 thomas Exp $
29 * $DragonFly: src/sys/dev/disk/ata/atapi-all.c,v 1.13 2004/08/17 20:59:39 dillon Exp $
33 #include "use_atapicd.h"
34 #include "use_atapifd.h"
35 #include "use_atapist.h"
36 #include "use_atapicam.h"
38 #include <sys/param.h>
39 #include <sys/systm.h>
41 #include <sys/kernel.h>
43 #include <sys/malloc.h>
45 #include <sys/sysctl.h>
46 #include <machine/bus.h>
47 #include <machine/clock.h>
50 #include "atapi-all.h"
53 static void atapi_requeue(struct ata_channel *chan, struct atapi_request *req);
54 static void atapi_read(struct atapi_request *, int);
55 static void atapi_write(struct atapi_request *, int);
56 static void atapi_finish(struct atapi_request *);
57 static void atapi_timeout(struct atapi_request *);
58 static char *atapi_cmd2str(u_int8_t);
59 static char *atapi_skey2str(u_int8_t);
62 #define ATAPI_MAX_RETRIES 3
65 static int atapi_dma = 0;
66 TUNABLE_INT("hw.ata.atapi_dma", &atapi_dma);
67 static MALLOC_DEFINE(M_ATAPI, "ATAPI generic", "ATAPI driver generic layer");
71 SYSCTL_INT(_hw_ata, OID_AUTO, atapi_dma, CTLFLAG_RD, &atapi_dma, 0,
72 "ATAPI device DMA mode control");
75 atapi_attach(struct ata_device *atadev, int alreadylocked)
78 ata_prtdev(atadev, "piomode=%d dmamode=%d udmamode=%d dmaflag=%d\n",
79 ata_pmode(atadev->param), ata_wmode(atadev->param),
80 ata_umode(atadev->param), atadev->param->support_dma);
83 ATA_SLEEPLOCK_CH(atadev->channel, ATA_CONTROL);
84 if (atapi_dma && !(atadev->param->drq_type == ATAPI_DRQT_INTR)) {
86 (ata_pmode(atadev->param) < 0) ?
87 (atadev->param->support_dma ? 4:0):ata_pmode(atadev->param),
88 (ata_wmode(atadev->param) < 0) ?
89 (atadev->param->support_dma ? 2:0):ata_wmode(atadev->param),
90 ata_umode(atadev->param));
94 ata_pmode(atadev->param) < 0 ? 0 : ata_pmode(atadev->param),
96 ATA_UNLOCK_CH(atadev->channel);
98 atadev->result = malloc(sizeof(struct atapi_reqsense), M_ATAPI,
101 switch (atadev->param->type) {
103 case ATAPI_TYPE_CDROM:
104 if (acdattach(atadev))
109 case ATAPI_TYPE_DIRECT:
110 if (afdattach(atadev))
115 case ATAPI_TYPE_TAPE:
116 if (astattach(atadev))
122 ata_prtdev(atadev, "<%.40s/%.8s> - NO DRIVER!\n",
123 atadev->param->model, atadev->param->revision);
124 free(atadev->result, M_ATAPI);
125 atadev->driver = NULL;
130 atapi_detach(struct ata_device *atadev)
132 struct atapi_request *request;
134 atadev->flags |= ATA_D_DETACHING;
135 ata_prtdev(atadev, "removed from configuration\n");
136 switch (atadev->param->type) {
138 case ATAPI_TYPE_CDROM:
143 case ATAPI_TYPE_DIRECT:
148 case ATAPI_TYPE_TAPE:
155 TAILQ_FOREACH(request, &atadev->channel->atapi_queue, chain) {
156 if (request->device != atadev)
158 TAILQ_REMOVE(&atadev->channel->atapi_queue, request, chain);
159 if (request->driver) {
160 struct buf *bp = (struct buf *) request->driver;
161 bp->b_flags |= B_ERROR;
166 free(request, M_ATAPI);
168 free(atadev->result, M_ATAPI);
169 atadev->driver = NULL;
175 atapi_queue_cmd(struct ata_device *atadev, int8_t *ccb, caddr_t data,
176 int count, int flags, int timeout,
177 atapi_callback_t callback, void *driver)
179 struct atapi_request *request;
182 request = malloc(sizeof(struct atapi_request), M_ATAPI, M_INTWAIT|M_ZERO);
183 request->device = atadev;
184 request->data = data;
185 request->bytecount = count;
186 request->flags = flags;
187 request->error = EINPROGRESS;
188 request->timeout = timeout * hz;
189 request->ccbsize = atadev->param->packet_size ? 16 : 12;
190 bcopy(ccb, request->ccb, request->ccbsize);
192 request->callback = callback;
193 request->driver = driver;
195 if (atadev->mode >= ATA_DMA) {
196 error = ata_dmaalloc(atadev, M_WAITOK);
197 KKASSERT(error == 0);
201 ata_prtdev(atadev, "queueing %s ", atapi_cmd2str(request->ccb[0]));
202 atapi_dump("ccb = ", &request->ccb[0], sizeof(request->ccb));
204 /* append onto controller queue and try to start controller */
206 if (flags & ATPR_F_AT_HEAD)
207 TAILQ_INSERT_HEAD(&atadev->channel->atapi_queue, request, chain);
209 TAILQ_INSERT_TAIL(&atadev->channel->atapi_queue, request, chain);
210 ata_start(atadev->channel);
212 /* if callback used, then just return, gets called from interrupt context */
218 /* only sleep when command is in progress */
219 if (request->error == EINPROGRESS)
220 tsleep((caddr_t)request, 0, "atprq", 0);
222 error = request->error;
224 bcopy(&request->sense, atadev->result, sizeof(struct atapi_reqsense));
225 free(request, M_ATAPI);
230 atapi_start(struct ata_device *atadev)
232 switch (atadev->param->type) {
234 case ATAPI_TYPE_CDROM:
239 case ATAPI_TYPE_DIRECT:
244 case ATAPI_TYPE_TAPE:
254 atapi_requeue(struct ata_channel *chan, struct atapi_request *req)
256 if (req->donecount) {
258 "WARNING: atapi resetting donecount %u for retry\n",
260 req->bytecount += req->donecount;
263 TAILQ_INSERT_HEAD(&chan->atapi_queue, req, chain);
267 atapi_transfer(struct atapi_request *request)
269 struct ata_device *atadev = request->device;
274 ata_prtdev(atadev, "starting %s ", atapi_cmd2str(request->ccb[0]));
275 atapi_dump("ccb = ", &request->ccb[0], sizeof(request->ccb));
277 /* is this just a POLL DSC command ? */
278 if (request->ccb[0] == ATAPI_POLL_DSC) {
279 ATA_OUTB(atadev->channel->r_io, ATA_DRIVE, ATA_D_IBM | atadev->unit);
281 if (ATA_INB(atadev->channel->r_altio, ATA_ALTSTAT) & ATA_S_DSC)
284 request->error = EBUSY;
285 atapi_finish(request);
286 return ATA_OP_FINISHED;
289 /* start timeout for this command */
290 request->timeout_handle = timeout((timeout_t *)atapi_timeout,
291 request, request->timeout);
293 if (!(request->flags & ATPR_F_INTERNAL))
294 atadev->cmd = request->ccb[0];
296 /* if DMA enabled setup DMA hardware */
297 request->flags &= ~ATPR_F_DMA_USED;
298 if ((atadev->mode >= ATA_DMA) &&
299 (request->ccb[0] == ATAPI_READ ||
300 request->ccb[0] == ATAPI_READ_BIG ||
301 request->ccb[0] == ATAPI_READ_CD ||
302 ((request->ccb[0] == ATAPI_WRITE ||
303 request->ccb[0] == ATAPI_WRITE_BIG) &&
304 !(atadev->channel->flags & ATA_ATAPI_DMA_RO))) &&
305 !ata_dmasetup(atadev, (void *)request->data, request->bytecount)) {
306 request->flags |= ATPR_F_DMA_USED;
309 /* start ATAPI operation */
310 if (ata_command(atadev, ATA_C_PACKET_CMD,
311 min(request->bytecount, 65534) << 8, 0,
312 (request->flags & ATPR_F_DMA_USED) ? ATA_F_DMA : 0,
314 ata_prtdev(atadev, "failure to send ATAPI packet command\n");
316 if (request->flags & ATPR_F_DMA_USED)
317 ata_dmastart(atadev, request->data, request->bytecount,
318 request->flags & ATPR_F_READ);
320 /* command interrupt device ? just return */
321 if (atadev->param->drq_type == ATAPI_DRQT_INTR)
322 return ATA_OP_CONTINUES;
324 /* ready to write ATAPI command */
325 timout = 5000; /* might be less for fast devices */
327 reason = ATA_INB(atadev->channel->r_io, ATA_IREASON);
328 atadev->channel->status = ATA_INB(atadev->channel->r_io, ATA_STATUS);
329 if (((reason & (ATA_I_CMD | ATA_I_IN)) |
330 (atadev->channel->status&(ATA_S_DRQ|ATA_S_BUSY)))==ATAPI_P_CMDOUT)
335 ata_prtdev(atadev, "failure to execute ATAPI packet command\n");
336 untimeout((timeout_t *)atapi_timeout, request, request->timeout_handle);
337 request->error = EIO;
338 atapi_finish(request);
339 return ATA_OP_FINISHED;
342 /* this seems to be needed for some (slow) devices */
345 /* send actual command */
346 ATA_OUTSW(atadev->channel->r_io, ATA_DATA, (int16_t *)request->ccb,
347 request->ccbsize / sizeof(int16_t));
348 return ATA_OP_CONTINUES;
352 atapi_interrupt(struct atapi_request *request)
354 struct ata_device *atadev = request->device;
355 int reason, dma_stat = 0;
357 reason = (ATA_INB(atadev->channel->r_io, ATA_IREASON)&(ATA_I_CMD|ATA_I_IN))|
358 (atadev->channel->status & ATA_S_DRQ);
360 if (reason == ATAPI_P_CMDOUT) {
361 if (!(atadev->channel->status & ATA_S_DRQ)) {
362 ata_prtdev(atadev, "command interrupt without DRQ\n");
363 untimeout((timeout_t *)atapi_timeout,
364 request, request->timeout_handle);
365 request->error = EIO;
366 atapi_finish(request);
367 return ATA_OP_FINISHED;
369 ATA_OUTSW(atadev->channel->r_io, ATA_DATA, (int16_t *)request->ccb,
370 request->ccbsize / sizeof(int16_t));
371 return ATA_OP_CONTINUES;
374 if (request->flags & ATPR_F_DMA_USED) {
375 dma_stat = ata_dmadone(atadev);
376 if ((atadev->channel->status & (ATA_S_ERROR | ATA_S_DWF)) ||
377 dma_stat & ATA_BMSTAT_ERROR) {
378 request->result = ATA_INB(atadev->channel->r_io, ATA_ERROR);
382 request->donecount = request->bytecount;
383 request->bytecount = 0;
387 int length = ATA_INB(atadev->channel->r_io, ATA_CYL_LSB) |
388 ATA_INB(atadev->channel->r_io, ATA_CYL_MSB) << 8;
392 if (request->flags & ATPR_F_READ) {
393 request->result = ATA_INB(atadev->channel->r_io, ATA_ERROR);
394 ata_prtdev(atadev, "%s trying to write on read buffer\n",
395 atapi_cmd2str(atadev->cmd));
398 atapi_write(request, length);
399 return ATA_OP_CONTINUES;
402 if (!(request->flags & ATPR_F_READ)) {
403 request->result = ATA_INB(atadev->channel->r_io, ATA_ERROR);
404 ata_prtdev(atadev, "%s trying to read on write buffer\n",
405 atapi_cmd2str(atadev->cmd));
408 atapi_read(request, length);
409 return ATA_OP_CONTINUES;
411 case ATAPI_P_DONEDRQ:
412 ata_prtdev(atadev, "%s DONEDRQ\n", atapi_cmd2str(atadev->cmd));
413 if (request->flags & ATPR_F_READ)
414 atapi_read(request, length);
416 atapi_write(request, length);
421 if (atadev->channel->status & (ATA_S_ERROR | ATA_S_DWF))
422 request->result = ATA_INB(atadev->channel->r_io, ATA_ERROR);
424 if (!(request->flags & ATPR_F_INTERNAL))
429 ata_prtdev(atadev, "unknown transfer phase %#x:%#x\n",
430 ATA_INB(atadev->channel->r_io, ATA_IREASON), reason);
431 request->result = ATA_S_ERROR;
434 untimeout((timeout_t *)atapi_timeout, request, request->timeout_handle);
436 /* check for error, if valid sense key, queue a request sense cmd */
437 if ((request->result & ATAPI_SK_MASK) &&
438 request->ccb[0] != ATAPI_REQUEST_SENSE) {
439 bzero(request->ccb, request->ccbsize);
440 request->ccb[0] = ATAPI_REQUEST_SENSE;
441 request->ccb[4] = sizeof(struct atapi_reqsense);
442 request->bytecount = sizeof(struct atapi_reqsense);
443 request->flags &= ATPR_F_QUIET;
444 request->flags |= ATPR_F_READ | ATPR_F_INTERNAL;
445 TAILQ_INSERT_HEAD(&atadev->channel->atapi_queue, request, chain);
448 if (request->result) {
449 switch ((request->result & ATAPI_SK_MASK)) {
450 case ATAPI_SK_NO_SENSE:
454 case ATAPI_SK_RECOVERED_ERROR:
455 ata_prtdev(atadev, "%s - recovered error\n",
456 atapi_cmd2str(atadev->cmd));
460 case ATAPI_SK_NOT_READY:
461 request->error = EBUSY;
464 case ATAPI_SK_UNIT_ATTENTION:
465 atadev->flags |= ATA_D_MEDIA_CHANGED;
466 request->error = EIO;
470 request->error = EIO;
472 if (request->flags & ATPR_F_QUIET)
475 ata_prtdev(atadev, "%s - %s asc=0x%02x ascq=0x%02x ",
476 atapi_cmd2str(atadev->cmd),
477 atapi_skey2str(request->sense.sense_key),
478 request->sense.asc, request->sense.ascq);
479 if (request->sense.sksv)
480 printf("sks=0x%02x 0x%02x 0x%02x ",
481 request->sense.sk_specific,
482 request->sense.sk_specific1,
483 request->sense.sk_specific2);
484 printf("error=0x%02x\n", request->result & ATAPI_E_MASK);
489 atapi_finish(request);
491 return ATA_OP_FINISHED;
495 atapi_reinit(struct ata_device *atadev)
497 /* reinit device parameters */
498 if (atadev->mode >= ATA_DMA)
500 (ata_pmode(atadev->param) < 0) ?
501 (atadev->param->support_dma ? 4:0):ata_pmode(atadev->param),
502 (ata_wmode(atadev->param) < 0) ?
503 (atadev->param->support_dma ? 2:0):ata_wmode(atadev->param),
504 ata_umode(atadev->param));
507 ata_pmode(atadev->param)<0 ? 0 : ata_pmode(atadev->param),
512 atapi_test_ready(struct ata_device *atadev)
514 int8_t ccb[16] = { ATAPI_TEST_UNIT_READY, 0, 0, 0, 0,
515 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
517 return atapi_queue_cmd(atadev, ccb, NULL, 0, 0, 30, NULL, NULL);
521 atapi_wait_dsc(struct ata_device *atadev, int timeout)
524 int8_t ccb[16] = { ATAPI_POLL_DSC, 0, 0, 0, 0,
525 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
528 while (timeout > 0) {
529 error = atapi_queue_cmd(atadev, ccb, NULL, 0, 0, 0, NULL, NULL);
532 tsleep((caddr_t)&error, 0, "atpwt", hz / 2);
539 atapi_dump(char *label, void *data, int len)
543 printf("%s %02x", label, *p++);
545 printf ("-%02x", *p++);
550 atapi_read(struct atapi_request *request, int length)
552 int8_t **buffer = (int8_t **)&request->data;
553 int size = min(request->bytecount, length);
554 struct ata_channel *ch = request->device->channel;
557 if (request->flags & ATPR_F_INTERNAL)
558 *buffer = (int8_t *)&request->sense;
560 if (ch->flags & ATA_USE_16BIT || (size % sizeof(int32_t)))
561 ATA_INSW(ch->r_io, ATA_DATA, (void *)((uintptr_t)*buffer),
562 size / sizeof(int16_t));
564 ATA_INSL(ch->r_io, ATA_DATA, (void *)((uintptr_t)*buffer),
565 size / sizeof(int32_t));
567 if (request->bytecount < length) {
568 ata_prtdev(request->device, "read data overrun %d/%d\n",
569 length, request->bytecount);
570 for (resid=request->bytecount; resid<length; resid+=sizeof(int16_t))
571 ATA_INW(ch->r_io, ATA_DATA);
574 request->bytecount -= size;
575 request->donecount += size;
579 atapi_write(struct atapi_request *request, int length)
581 int8_t **buffer = (int8_t **)&request->data;
582 int size = min(request->bytecount, length);
583 struct ata_channel *ch = request->device->channel;
586 if (request->flags & ATPR_F_INTERNAL)
587 *buffer = (int8_t *)&request->sense;
589 if (ch->flags & ATA_USE_16BIT || (size % sizeof(int32_t)))
590 ATA_OUTSW(ch->r_io, ATA_DATA, (void *)((uintptr_t)*buffer),
591 size / sizeof(int16_t));
593 ATA_OUTSL(ch->r_io, ATA_DATA, (void *)((uintptr_t)*buffer),
594 size / sizeof(int32_t));
596 if (request->bytecount < length) {
597 ata_prtdev(request->device, "write data underrun %d/%d\n",
598 length, request->bytecount);
599 for (resid=request->bytecount; resid<length; resid+=sizeof(int16_t))
600 ATA_OUTW(ch->r_io, ATA_DATA, 0);
603 request->bytecount -= size;
604 request->donecount += size;
608 atapi_finish(struct atapi_request *request)
611 ata_prtdev(request->device, "finished %s%s\n",
612 request->callback ? "callback " : "",
613 atapi_cmd2str(request->ccb[0]));
615 if (request->callback) {
616 if (!((request->callback)(request))) {
617 free(request, M_ATAPI);
621 wakeup((caddr_t)request);
625 atapi_timeout(struct atapi_request *request)
627 struct ata_device *atadev = request->device;
629 atadev->channel->running = NULL;
630 ata_prtdev(atadev, "%s command timeout - resetting\n",
631 atapi_cmd2str(request->ccb[0]));
633 if (request->flags & ATPR_F_DMA_USED) {
635 if (request->retries == ATAPI_MAX_RETRIES) {
637 (ata_pmode(atadev->param) < 0) ? 0 :
638 ata_pmode(atadev->param), -1, -1);
639 ata_prtdev(atadev, "trying fallback to PIO mode\n");
640 request->retries = 0;
644 /* if retries still permit, reinject this request */
645 if (request->retries++ < ATAPI_MAX_RETRIES) {
646 atapi_requeue(atadev->channel, request);
649 /* retries all used up, return error */
650 request->error = EIO;
651 wakeup((caddr_t)request);
653 ata_reinit(atadev->channel);
657 atapi_cmd2str(u_int8_t cmd)
660 case 0x00: return ("TEST_UNIT_READY");
661 case 0x01: return ("REZERO");
662 case 0x03: return ("REQUEST_SENSE");
663 case 0x04: return ("FORMAT_UNIT");
664 case 0x08: return ("READ");
665 case 0x0a: return ("WRITE");
666 case 0x10: return ("WEOF");
667 case 0x11: return ("SPACE");
668 case 0x15: return ("MODE_SELECT");
669 case 0x19: return ("ERASE");
670 case 0x1a: return ("MODE_SENSE");
671 case 0x1b: return ("START_STOP");
672 case 0x1e: return ("PREVENT_ALLOW");
673 case 0x25: return ("READ_CAPACITY");
674 case 0x28: return ("READ_BIG");
675 case 0x2a: return ("WRITE_BIG");
676 case 0x2b: return ("LOCATE");
677 case 0x34: return ("READ_POSITION");
678 case 0x35: return ("SYNCHRONIZE_CACHE");
679 case 0x3b: return ("WRITE_BUFFER");
680 case 0x3c: return ("READ_BUFFER");
681 case 0x42: return ("READ_SUBCHANNEL");
682 case 0x43: return ("READ_TOC");
683 case 0x45: return ("PLAY_10");
684 case 0x47: return ("PLAY_MSF");
685 case 0x48: return ("PLAY_TRACK");
686 case 0x4b: return ("PAUSE");
687 case 0x51: return ("READ_DISK_INFO");
688 case 0x52: return ("READ_TRACK_INFO");
689 case 0x53: return ("RESERVE_TRACK");
690 case 0x54: return ("SEND_OPC_INFO");
691 case 0x55: return ("MODE_SELECT_BIG");
692 case 0x58: return ("REPAIR_TRACK");
693 case 0x59: return ("READ_MASTER_CUE");
694 case 0x5a: return ("MODE_SENSE_BIG");
695 case 0x5b: return ("CLOSE_TRACK/SESSION");
696 case 0x5c: return ("READ_BUFFER_CAPACITY");
697 case 0x5d: return ("SEND_CUE_SHEET");
698 case 0xa1: return ("BLANK_CMD");
699 case 0xa3: return ("SEND_KEY");
700 case 0xa4: return ("REPORT_KEY");
701 case 0xa5: return ("PLAY_12");
702 case 0xa6: return ("LOAD_UNLOAD");
703 case 0xad: return ("READ_DVD_STRUCTURE");
704 case 0xb4: return ("PLAY_CD");
705 case 0xbb: return ("SET_SPEED");
706 case 0xbd: return ("MECH_STATUS");
707 case 0xbe: return ("READ_CD");
708 case 0xff: return ("POLL_DSC");
710 static char buffer[20];
711 sprintf(buffer, "unknown CMD (0x%02x)", cmd);
718 atapi_skey2str(u_int8_t skey)
721 case 0x00: return ("NO SENSE");
722 case 0x01: return ("RECOVERED ERROR");
723 case 0x02: return ("NOT READY");
724 case 0x03: return ("MEDIUM ERROR");
725 case 0x04: return ("HARDWARE ERROR");
726 case 0x05: return ("ILLEGAL REQUEST");
727 case 0x06: return ("UNIT ATTENTION");
728 case 0x07: return ("DATA PROTECT");
729 case 0x08: return ("BLANK CHECK");
730 case 0x09: return ("VENDOR SPECIFIC");
731 case 0x0a: return ("COPY ABORTED");
732 case 0x0b: return ("ABORTED COMMAND");
733 case 0x0c: return ("EQUAL");
734 case 0x0d: return ("VOLUME OVERFLOW");
735 case 0x0e: return ("MISCOMPARE");
736 case 0x0f: return ("RESERVED");
737 default: return("UNKNOWN");