xref: /haiku/src/add-ons/kernel/bus_managers/firewire/firewire.cpp (revision 7a74a5df454197933bc6e80a542102362ee98703)
1  /*-
2   * Copyright (c) 2003 Hidetoshi Shimokawa
3   * Copyright (c) 1998-2002 Katsushi Kobayashi and Hidetoshi Shimokawa
4   * All rights reserved.
5   *
6   * Redistribution and use in source and binary forms, with or without
7   * modification, are permitted provided that the following conditions
8   * are met:
9   * 1. Redistributions of source code must retain the above copyright
10   *    notice, this list of conditions and the following disclaimer.
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. All advertising materials mentioning features or use of this software
15   *    must display the acknowledgement as bellow:
16   *
17   *    This product includes software developed by K. Kobayashi and H. Shimokawa
18   *
19   * 4. The name of the author may not be used to endorse or promote products
20   *    derived from this software without specific prior written permission.
21   *
22   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
24   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25   * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
26   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
27   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
28   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
30   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
31   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32   * POSSIBILITY OF SUCH DAMAGE.
33   *
34   * $FreeBSD: src/sys/dev/firewire/firewire.c,v 1.100 2007/07/20 03:42:57 simokawa Exp $
35   *
36   */
37  #include <OS.h>
38  #include <Drivers.h>
39  #include <KernelExport.h>
40  #include <SupportDefs.h>
41  #include <ByteOrder.h>
42  #include <malloc.h>
43  #include <string.h>
44  #include <stdio.h>
45  #include <sys/param.h>
46  #include <sys/types.h>
47  #include <sys/uio.h>
48  #include <dpc.h>
49  
50  #include "fwdebug.h"
51  #include "fwglue.h"
52  #include "queue.h"
53  #include "firewire.h"
54  #include "iec13213.h"
55  #include "firewirereg.h"
56  #include "fwmem.h"
57  #include "iec68113.h"
58  #include "timer.h"
59  #include "util.h"
60  
61  #define PROBE_THREAD_PRIORITY 80
62  
63  int firewire_debug=1, try_bmr=1, hold_count=0;
64  
65  #define FW_MAXASYRTY 4
66  
67  static void firewire_xfer_timeout(void *);
68  static void fw_try_bmr (void *);
69  static void fw_try_bmr_callback (struct fw_xfer *);
70  static void fw_asystart (struct fw_xfer *);
71  static int fw_get_tlabel (struct firewire_comm *, struct fw_xfer *);
72  static void fw_bus_probe (void *);
73  static void fw_attach_dev (struct firewire_comm *);
74  static int32 fw_bus_probe_thread(void *);
75  #ifdef FW_VMACCESS
76  static void fw_vmaccess (struct fw_xfer *);
77  #endif
78  static int fw_bmr (struct firewire_comm *);
79  static void fw_dump_hdr(struct fw_pkt *, const char *);
80  
81  
82  extern const char *const linkspeed[];
83  const char *const linkspeed[] = {
84  	"S100", "S200", "S400", "S800",
85  	"S1600", "S3200", "undef", "undef"
86  };
87  
88  static const char *const tcode_str[] = {
89  	"WREQQ", "WREQB", "WRES",   "undef",
90  	"RREQQ", "RREQB", "RRESQ",  "RRESB",
91  	"CYCS",  "LREQ",  "STREAM", "LRES",
92  	"undef", "undef", "PHY",    "undef"
93  };
94  
95  /* IEEE-1394a Table C-2 Gap count as a function of hops*/
96  #define MAX_GAPHOP 15
97  u_int gap_cnt[] = { 5,  5,  7,  8, 10, 13, 16, 18,
98  		   21, 24, 26, 29, 32, 35, 37, 40};
99  
100  
101  /*
102   * Lookup fwdev by node id.
103   */
104  struct fw_device *
105  fw_noderesolve_nodeid(struct firewire_comm *fc, int dst)
106  {
107  	struct fw_device *fwdev;
108  	int s;
109  
110  	s = splfw();
111  	STAILQ_FOREACH(fwdev, &fc->devices, link)
112  		if (fwdev->dst == dst && fwdev->status != FWDEVINVAL)
113  			break;
114  	splx(s);
115  
116  	return fwdev;
117  }
118  
119  /*
120   * Lookup fwdev by EUI64.
121   */
122  struct fw_device *
123  fw_noderesolve_eui64(struct firewire_comm *fc, struct fw_eui64 *eui)
124  {
125  	struct fw_device *fwdev;
126  	int s;
127  
128  	s = splfw();
129  	FW_GLOCK(fc);
130  	STAILQ_FOREACH(fwdev, &fc->devices, link)
131  		if (FW_EUI64_EQUAL(fwdev->eui, *eui))
132  			break;
133  	FW_GUNLOCK(fc);
134  	splx(s);
135  
136  	if(fwdev == NULL) return NULL;
137  	if(fwdev->status == FWDEVINVAL) return NULL;
138  	return fwdev;
139  }
140  
141  /*
142   * Async. request procedure for userland application.
143   */
144  int
145  fw_asyreq(struct firewire_comm *fc, int sub, struct fw_xfer *xfer)
146  {
147  	int err = 0;
148  	struct fw_xferq *xferq;
149  	int len;
150  	struct fw_pkt *fp;
151  	int tcode;
152  	struct tcode_info *info;
153  
154  	if(xfer == NULL) return EINVAL;
155  	if(xfer->hand == NULL){
156  		printf("hand == NULL\n");
157  		return EINVAL;
158  	}
159  	fp = &xfer->send.hdr;
160  
161  	tcode = fp->mode.common.tcode & 0xf;
162  	info = &fc->tcode[tcode];
163  	if (info->flag == 0) {
164  		printf("invalid tcode=%x\n", tcode);
165  		return EINVAL;
166  	}
167  
168  	/* XXX allow bus explore packets only after bus rest */
169  	if ((fc->status < FWBUSEXPLORE) &&
170  	    ((tcode != FWTCODE_RREQQ) || (fp->mode.rreqq.dest_hi != 0xffff) ||
171  	    (fp->mode.rreqq.dest_lo  < 0xf0000000) ||
172  	    (fp->mode.rreqq.dest_lo >= 0xf0001000))) {
173  		xfer->resp = EAGAIN;
174  		xfer->flag = FWXF_BUSY;
175  		return (EAGAIN);
176  	}
177  
178  	if (info->flag & FWTI_REQ)
179  		xferq = fc->atq;
180  	else
181  		xferq = fc->ats;
182  	len = info->hdr_len;
183  	if (xfer->send.pay_len > MAXREC(fc->maxrec)) {
184  		printf("send.pay_len > maxrec\n");
185  		return EINVAL;
186  	}
187  	if (info->flag & FWTI_BLOCK_STR)
188  		len = fp->mode.stream.len;
189  	else if (info->flag & FWTI_BLOCK_ASY)
190  		len = fp->mode.rresb.len;
191  	else
192  		len = 0;
193  	if (len != xfer->send.pay_len){
194  		printf("len(%d) != send.pay_len(%d) %s(%x)\n",
195  		    len, xfer->send.pay_len, tcode_str[tcode], tcode);
196  		return EINVAL;
197  	}
198  
199  	if(xferq->start == NULL){
200  		printf("xferq->start == NULL\n");
201  		return EINVAL;
202  	}
203  	if(!(xferq->queued < xferq->maxq)){
204  		device_printf(fc->bdev, "Discard a packet (queued=%d)\n",
205  			xferq->queued);
206  		return EAGAIN;
207  	}
208  
209  	xfer->tl = -1;
210  	if (info->flag & FWTI_TLABEL) {
211  		if (fw_get_tlabel(fc, xfer) < 0)
212  			return EAGAIN;
213  	}
214  
215  	xfer->resp = 0;
216  	xfer->fc = fc;
217  	xfer->q = xferq;
218  
219  	fw_asystart(xfer);
220  	return err;
221  }
222  /*
223   * Wakeup blocked process.
224   */
225  void
226  fw_xferwake(struct fw_xfer *xfer)
227  {
228  //	struct mtx *lock = &xfer->fc->wait_lock;
229  	mutex *lock = &xfer->fc->wait_lock;
230  
231  	mtx_lock(lock);
232  	xfer->flag |= FWXF_WAKE;
233  	mtx_unlock(lock);
234  
235  //	wakeup(xfer);
236  	release_sem(xfer->Sem);
237  	return;
238  }
239  
240  int
241  fw_xferwait(struct fw_xfer *xfer)
242  {
243  //	struct mtx *lock = &xfer->fc->wait_lock;
244  	mutex *lock = &xfer->fc->wait_lock;
245  	int err = 0;
246  
247  	mtx_lock(lock);
248  	if ((xfer->flag & FWXF_WAKE) == 0){
249  //		err = msleep((void *)xfer, lock, PWAIT|PCATCH, "fw_xferwait", 0);
250  		mtx_unlock(lock);
251  		err = acquire_sem(xfer->Sem);
252  		return err;
253  	}
254  	mtx_unlock(lock);
255  
256  	return (err);
257  }
258  
259  /*
260   * Async. request with given xfer structure.
261   */
262  static void
263  fw_asystart(struct fw_xfer *xfer)
264  {
265  	struct firewire_comm *fc = xfer->fc;
266  	int s;
267  	s = splfw();
268  	/* Protect from interrupt/timeout */
269  	FW_GLOCK(fc);
270  	xfer->flag = FWXF_INQ;
271  	STAILQ_INSERT_TAIL(&xfer->q->q, xfer, link);
272  #if 0
273  	xfer->q->queued ++;
274  #endif
275  	FW_GUNLOCK(fc);
276  	splx(s);
277  	/* XXX just queue for mbuf */
278  //	if (xfer->mbuf == NULL)
279  		xfer->q->start(fc);
280  	return;
281  }
282  
283  
284  static void
285  firewire_xfer_timeout(void *arg)
286  {
287  	struct firewire_comm *fc = (struct firewire_comm *)arg;
288  	struct fw_xfer *xfer, *txfer;
289  //	struct timeval tv;
290  //	struct timeval split_timeout;
291  	bigtime_t tv;
292  	STAILQ_HEAD(, fw_xfer) xfer_timeout;
293  	int i, s;
294  
295  //	split_timeout.tv_sec = 0;
296  //	split_timeout.tv_usec = 200 * 1000;	 /* 200 msec */
297  
298  //	microtime(&tv);
299  //	timevalsub(&tv, &split_timeout);
300  	tv = system_time();
301  	tv -= 200*1000;
302  	STAILQ_INIT(&xfer_timeout);
303  
304  	s = splfw();
305  	mtx_lock(&fc->tlabel_lock);
306  	for (i = 0; i < 0x40; i ++) {
307  		while ((xfer = STAILQ_FIRST(&fc->tlabels[i])) != NULL) {
308  			if ((xfer->flag & FWXF_SENT) == 0)
309  				/* not sent yet */
310  				break;
311  //			if (timevalcmp(&xfer->tv, &tv, >))
312  			if (xfer->tv > tv)
313  				/* the rests are newer than this */
314  				break;
315  			device_printf(fc->bdev,
316  				"split transaction timeout: "
317  				"tl=0x%x flag=0x%02x\n", i, xfer->flag);
318  			fw_dump_hdr(&xfer->send.hdr, "send");
319  			xfer->resp = ETIMEDOUT;
320  			STAILQ_REMOVE_HEAD(&fc->tlabels[i], tlabel);
321  			STAILQ_INSERT_TAIL(&xfer_timeout, xfer, tlabel);
322  		}
323  	}
324  	mtx_unlock(&fc->tlabel_lock);
325  	splx(s);
326  	fc->timeout(fc);
327  
328  	STAILQ_FOREACH_SAFE(xfer, &xfer_timeout, tlabel, txfer)
329  		xfer->hand(xfer);
330  }
331  
332  #define WATCHDOG_HZ 10
333  static void
334  firewire_watchdog(void *arg)
335  {
336  	struct firewire_comm *fc;
337  	static int watchdog_clock = 0;
338  
339  	fc = (struct firewire_comm *)arg;
340  
341  	/*
342  	 * At boot stage, the device interrupt is disabled and
343  	 * We encounter a timeout easily. To avoid this,
344  	 * ignore clock interrupt for a while.
345  	 */
346  	if (watchdog_clock > WATCHDOG_HZ * 15)
347  //		taskqueue_enqueue(fc->taskqueue, &fc->task_timeout);
348  		firewire_xfer_timeout(fc);
349  	else
350  		watchdog_clock ++;
351  
352  //	callout_reset(&fc->timeout_callout, hz / WATCHDOG_HZ,
353  //			(void *)firewire_watchdog, (void *)fc);
354  }
355  
356  #if 0//to do
357  status_t
358  firewire_add_child(struct firewire_softc *sc, const char *childname,
359  		struct firewire_notify_hooks *hooks)
360  {
361  	struct firewire_child_info *element, *info;
362  	if (!childname)
363  		return B_BAD_VALUE;
364  
365  	element = sc->fc->childList;
366  	while (element) {
367  		if (strcmp(element->child_name, childname) == 0) {
368  			// we already have an entry for this child
369  			return B_OK;
370  		}
371  
372  		element = element->link;
373  	}
374  
375  	info = malloc(sizeof(struct firewire_child_info));
376  	if (!info) {
377  		return B_NO_MEMORY;
378  	}
379  
380  	info->child_name = strdup(childname);
381  	info->notify_hooks.device_attach = hooks->device_attach;
382  	info->notify_hooks.device_detach = hooks->device_detach;
383  	info->cookie = NULL;
384  	info->link = NULL;
385  
386  	element = sc->fc->childList;
387  	if (element) {
388  		while (element->link)
389  			element = element->link;
390  		element->link = info;
391  	} else
392  		sc->fc->childList = info;
393  
394  	hooks->device_attach(sc, &info->cookie);
395  	return B_OK;
396  }
397  
398  status_t
399  firewire_remove_child(struct firewire_softc *sc, const char *childname)
400  {
401  
402  	struct firewire_child_info *element = sc->fc->childList;
403  	struct firewire_child_info *temp = element;
404  	while (element) {
405  		if (strcmp(element->child_name, childname) == 0) {
406  			// trigger the device removed hook
407  			element->notify_hooks.device_detach(sc, element->cookie);
408  			if(temp->link == NULL)
409  				sc->fc->childList = NULL;//childList has only a node
410  			else
411  				temp->link = element->link;
412  
413  			free(element);
414  			return B_OK;
415  		}
416  
417  		temp = element;
418  		element = element->link;
419  	}
420  
421  	return B_NAME_NOT_FOUND;
422  }
423  #endif
424  
425  /*
426   * The attach routine.
427   */
428  int
429  firewire_attach(struct firewire_comm *fc, struct firewire_softc *sc)
430  {
431  	sc->fc = fc;
432  	fc->status = (uint)FWBUSNOTREADY;
433  
434  //	unit = device_get_unit(dev);
435  	if( fc->nisodma > FWMAXNDMA) fc->nisodma = FWMAXNDMA;
436  
437  //	fwdev_makedev(sc);
438  
439  	fc->crom_src_buf = (struct crom_src_buf *)malloc(
440  				sizeof(struct crom_src_buf));
441  	if (fc->crom_src_buf == NULL) {
442  		device_printf(fc->dev, "%s: Malloc Failure crom src buff\n", __func__);
443  		return ENOMEM;
444  	}
445  	memset(fc->crom_src_buf, 0, sizeof(struct crom_src_buf));
446  	fc->topology_map = (struct fw_topology_map *)malloc(
447  				sizeof(struct fw_topology_map));
448  	if (fc->topology_map == NULL) {
449  		device_printf(fc->dev, "%s: Malloc Failure topology map\n", __func__);
450  		free(fc->crom_src_buf);
451  		return ENOMEM;
452  	}
453  	memset(fc->topology_map, 0, sizeof(struct fw_topology_map));
454  	fc->speed_map = (struct fw_speed_map *)malloc(
455  				sizeof(struct fw_speed_map));
456  	if (fc->speed_map == NULL) {
457  		device_printf(fc->dev, "%s: Malloc Failure speed map\n", __func__);
458  		free(fc->crom_src_buf);
459  		free(fc->topology_map);
460  		return ENOMEM;
461  	}
462  	memset(fc->speed_map, 0, sizeof(struct fw_speed_map));
463  
464  	mtx_init(&fc->wait_lock, "fwwait", NULL, MTX_DEF);
465  	mtx_init(&fc->tlabel_lock, "fwtlabel", NULL, MTX_DEF);
466  //	CALLOUT_INIT(&fc->timeout_callout);
467  //	CALLOUT_INIT(&fc->bmr_callout);
468  //	CALLOUT_INIT(&fc->busprobe_callout);
469  //	TASK_INIT(&fc->task_timeout, 0, firewire_xfer_timeout, (void *)fc);
470  
471  //	callout_reset(&sc->fc->timeout_callout, hz,
472  //			(void *)firewire_watchdog, (void *)sc->fc);
473  	fc->timeout_callout = create_timer(firewire_watchdog, fc,
474  			hz/WATCHDOG_HZ, B_PERIODIC_TIMER);
475  
476  	/* create thread */
477  //	kproc_create(fw_bus_probe_thread, (void *)fc, &fc->probe_thread,
478  //		0, 0, "fw%d_probe", unit);
479  	fc->probe_thread = spawn_kernel_thread(fw_bus_probe_thread,
480  			"fw_probe", PROBE_THREAD_PRIORITY, fc);
481  	if(fc->probe_thread < B_OK)
482  		dprintf("can not Create bus probe thread\n");
483  	resume_thread(fc->probe_thread);
484  
485  	/* Locate our children */
486  //	bus_generic_probe(dev);
487  
488  	/* launch attachement of the added children */
489  //	bus_generic_attach(dev);
490  /*	firewire_driver_info *element = sc->childList;
491  	while(element){
492  		element->notify_hooks.device_attach(sc, element->cookie);
493  		element = element->link;
494  	}*/
495  
496  	/* bus_reset */
497  	FW_GLOCK(fc);
498  	fw_busreset(fc, (uint)FWBUSNOTREADY);
499  	FW_GUNLOCK(fc);
500  	fc->ibr(fc);
501  
502  	return 0;
503  }
504  
505  /*
506   * Dettach it.
507   */
508  void
509  firewire_detach(struct firewire_softc *sc)
510  {
511  	struct firewire_comm *fc;
512  	struct fw_device *fwdev, *fwdev_next;
513  	struct firewire_child_info *element, *temp;
514  //	int err;
515  
516  	fc = sc->fc;
517  	mtx_lock(&fc->wait_lock);
518  	fc->status = (uint)FWBUSDETACH;
519  //	wakeup(fc);
520  	release_sem(fc->Sem);
521  /*	if (msleep(fc->probe_thread, &fc->wait_lock, PWAIT, "fwthr", hz * 60))
522  		printf("firewire probe thread didn't die\n");*/
523  	mtx_unlock(&fc->wait_lock);
524  	DELAY(hz*60);
525  
526  	if (fc->arq !=0 && fc->arq->maxq > 0)
527  		fw_drain_txq(fc);
528  /*	if ((err = fwdev_destroydev(sc)) != 0)
529  		return err;
530  
531  	if ((err = bus_generic_detach(dev)) != 0)
532  		return err;*/
533  
534  	element = sc->fc->childList;
535  	while(element){
536  		element->notify_hooks.device_detach(sc, element->cookie);
537  		temp = element;
538  		element = element->link;
539  		free(temp);
540  	}
541  	sc->fc->childList = NULL;
542  
543  /*	callout_stop(&fc->timeout_callout);
544  	callout_stop(&fc->bmr_callout);
545  	callout_stop(&fc->busprobe_callout);*/
546  	delete_timer(fc->timeout_callout);
547  	delete_timer(fc->bmr_callout);
548  	delete_timer(fc->busprobe_callout);
549  
550  
551  	/* XXX xfer_free and untimeout on all xfers */
552  	for (fwdev = STAILQ_FIRST(&fc->devices); fwdev != NULL;
553  							fwdev = fwdev_next) {
554  		fwdev_next = STAILQ_NEXT(fwdev, link);
555  		free(fwdev);
556  	}
557  	free(fc->topology_map);
558  	free(fc->speed_map);
559  	free(fc->crom_src_buf);
560  
561  	mtx_destroy(&fc->tlabel_lock);
562  	mtx_destroy(&fc->wait_lock);
563  //	return(0);
564  }
565  #if 0
566  static int
567  firewire_shutdown( device_t dev )
568  {
569  	return 0;
570  }
571  #endif
572  
573  
574  static void
575  fw_xferq_drain(struct fw_xferq *xferq)
576  {
577  	struct fw_xfer *xfer;
578  
579  	while ((xfer = STAILQ_FIRST(&xferq->q)) != NULL) {
580  		STAILQ_REMOVE_HEAD(&xferq->q, link);
581  #if 0
582  		xferq->queued --;
583  #endif
584  		xfer->resp = EAGAIN;
585  		xfer->flag = FWXF_SENTERR;
586  		fw_xfer_done(xfer);
587  	}
588  }
589  
590  void
591  fw_drain_txq(struct firewire_comm *fc)
592  {
593  	struct fw_xfer *xfer, *txfer;
594  	STAILQ_HEAD(, fw_xfer) xfer_drain;
595  	int i;
596  
597  	STAILQ_INIT(&xfer_drain);
598  
599  	FW_GLOCK(fc);
600  	fw_xferq_drain(fc->atq);
601  	fw_xferq_drain(fc->ats);
602  	for(i = 0; i < fc->nisodma; i++)
603  		fw_xferq_drain(fc->it[i]);
604  	FW_GUNLOCK(fc);
605  
606  	mtx_lock(&fc->tlabel_lock);
607  	for (i = 0; i < 0x40; i ++)
608  		while ((xfer = STAILQ_FIRST(&fc->tlabels[i])) != NULL) {
609  			if (firewire_debug)
610  				printf("tl=%d flag=%d\n", i, xfer->flag);
611  			xfer->resp = EAGAIN;
612  			STAILQ_REMOVE_HEAD(&fc->tlabels[i], tlabel);
613  			STAILQ_INSERT_TAIL(&xfer_drain, xfer, tlabel);
614  		}
615  	mtx_unlock(&fc->tlabel_lock);
616  
617  	STAILQ_FOREACH_SAFE(xfer, &xfer_drain, tlabel, txfer)
618  		xfer->hand(xfer);
619  }
620  
621  static void
622  fw_reset_csr(struct firewire_comm *fc)
623  {
624  	int i;
625  
626  	CSRARC(fc, STATE_CLEAR)
627  			= 1 << 23 | 0 << 17 | 1 << 16 | 1 << 15 | 1 << 14 ;
628  	CSRARC(fc, STATE_SET) = CSRARC(fc, STATE_CLEAR);
629  	CSRARC(fc, NODE_IDS) = 0x3f;
630  
631  	CSRARC(fc, TOPO_MAP + 8) = 0;
632  	fc->irm = (uint)-1;
633  
634  	fc->max_node = (uint)-1;
635  
636  	for(i = 2; i < 0x100/4 - 2 ; i++){
637  		CSRARC(fc, SPED_MAP + i * 4) = 0;
638  	}
639  	CSRARC(fc, STATE_CLEAR) = 1 << 23 | 0 << 17 | 1 << 16 | 1 << 15 | 1 << 14 ;
640  	CSRARC(fc, STATE_SET) = CSRARC(fc, STATE_CLEAR);
641  	CSRARC(fc, RESET_START) = 0;
642  	CSRARC(fc, SPLIT_TIMEOUT_HI) = 0;
643  	CSRARC(fc, SPLIT_TIMEOUT_LO) = 800 << 19;
644  	CSRARC(fc, CYCLE_TIME) = 0x0;
645  	CSRARC(fc, BUS_TIME) = 0x0;
646  	CSRARC(fc, BUS_MGR_ID) = 0x3f;
647  	CSRARC(fc, BANDWIDTH_AV) = 4915;
648  	CSRARC(fc, CHANNELS_AV_HI) = 0xffffffff;
649  	CSRARC(fc, CHANNELS_AV_LO) = 0xffffffff;
650  	CSRARC(fc, IP_CHANNELS) = (1 << 31);
651  
652  	CSRARC(fc, CONF_ROM) = 0x04 << 24;
653  	CSRARC(fc, CONF_ROM + 4) = 0x31333934; /* means strings 1394 */
654  	CSRARC(fc, CONF_ROM + 8) = 1 << 31 | 1 << 30 | 1 << 29 |
655  				1 << 28 | 0xff << 16 | 0x09 << 8;
656  	CSRARC(fc, CONF_ROM + 0xc) = 0;
657  
658  /* DV depend CSRs see blue book */
659  	CSRARC(fc, oPCR) &= ~DV_BROADCAST_ON;
660  	CSRARC(fc, iPCR) &= ~DV_BROADCAST_ON;
661  
662  	CSRARC(fc, STATE_CLEAR) &= ~(1 << 23 | 1 << 15 | 1 << 14 );
663  	CSRARC(fc, STATE_SET) = CSRARC(fc, STATE_CLEAR);
664  }
665  
666  static void
667  fw_init_crom(struct firewire_comm *fc)
668  {
669  	struct crom_src *src;
670  
671  	src = &fc->crom_src_buf->src;
672  	bzero(src, sizeof(struct crom_src));
673  
674  	/* BUS info sample */
675  	src->hdr.info_len = 4;
676  
677  	src->businfo.bus_name = CSR_BUS_NAME_IEEE1394;
678  
679  	src->businfo.irmc = 1;
680  	src->businfo.cmc = 1;
681  	src->businfo.isc = 1;
682  	src->businfo.bmc = 1;
683  	src->businfo.pmc = 0;
684  	src->businfo.cyc_clk_acc = 100;
685  	src->businfo.max_rec = fc->maxrec;
686  	src->businfo.max_rom = MAXROM_4;
687  #define FW_GENERATION_CHANGEABLE 2
688  	src->businfo.generation = FW_GENERATION_CHANGEABLE;
689  	src->businfo.link_spd = fc->speed;
690  
691  	src->businfo.eui64.hi = fc->eui.hi;
692  	src->businfo.eui64.lo = fc->eui.lo;
693  
694  	STAILQ_INIT(&src->chunk_list);
695  
696  	fc->crom_src = src;
697  	fc->crom_root = &fc->crom_src_buf->root;
698  }
699  
700  static void
701  fw_reset_crom(struct firewire_comm *fc)
702  {
703  	struct crom_src_buf *buf;
704  	struct crom_src *src;
705  	struct crom_chunk *root;
706  
707  	buf =  fc->crom_src_buf;
708  	src = fc->crom_src;
709  	root = fc->crom_root;
710  
711  	STAILQ_INIT(&src->chunk_list);
712  
713  	bzero(root, sizeof(struct crom_chunk));
714  	crom_add_chunk(src, NULL, root, 0);
715  	crom_add_entry(root, CSRKEY_NCAP, 0x0083c0); /* XXX */
716  	/* private company_id */
717  	crom_add_entry(root, CSRKEY_VENDOR, CSRVAL_VENDOR_PRIVATE);
718  #if 0
719  #ifdef __DragonFly__
720  	crom_add_simple_text(src, root, &buf->vendor, "DragonFly Project");
721  	crom_add_entry(root, CSRKEY_HW, __DragonFly_cc_version);
722  #else
723  	crom_add_simple_text(src, root, &buf->vendor, "FreeBSD Project");
724  	crom_add_entry(root, CSRKEY_HW, __FreeBSD_version);
725  #endif
726  #endif
727  	crom_add_simple_text(src, root, &buf->vendor, "HAIKU Project");
728  	crom_add_entry(root, CSRKEY_HW, B_CUR_DRIVER_API_VERSION);
729  	crom_add_simple_text(src, root, &buf->hw, "");
730  }
731  
732  /*
733   * Called after bus reset.
734   */
735  void
736  fw_busreset(struct firewire_comm *fc, uint32_t new_status)
737  {
738  	struct firewire_dev_comm *fdc;
739  	struct crom_src *src;
740  //	device_t *devlistp;
741  	uint32_t *newrom;
742  //	int i, devcnt;
743  	struct firewire_child_info *element = fc->childList;
744  
745  	FW_GLOCK_ASSERT(fc);
746  	if (fc->status == FWBUSMGRELECT)
747  //		callout_stop(&fc->bmr_callout);
748  		delete_timer(fc->bmr_callout);
749  	fc->status = new_status;
750  	fw_reset_csr(fc);
751  
752  	if ((int32)fc->status == FWBUSNOTREADY)
753  		fw_init_crom(fc);
754  
755  	fw_reset_crom(fc);
756  
757  
758  /*	if (device_get_children(fc->bdev, &devlistp, &devcnt) == 0) {
759  		for( i = 0 ; i < devcnt ; i++)
760  			if (device_get_state(devlistp[i]) >= DS_ATTACHED)  {
761  				fdc = device_get_softc(devlistp[i]);
762  				if (fdc->post_busreset != NULL)
763  					fdc->post_busreset(fdc);
764  			}
765  		free(devlistp);
766  	}*/
767  
768  	while(element){
769  //		fdc = &element->cookie.fd;
770  		fdc = (struct firewire_dev_comm *)element->cookie;
771  		if (fdc->post_busreset != NULL)
772  			fdc->post_busreset(fdc);
773  		element = element->link;
774  	}
775  
776  	src = &fc->crom_src_buf->src;
777          /*
778           * If the old config rom needs to be overwritten,
779           * bump the businfo.generation indicator to
780           * indicate that we need to be reprobed
781           * See 1394a-2000 8.3.2.5.4 for more details.
782           * generation starts at 2 and rolls over at 0xF
783           * back to 2.
784           *
785           * A generation of 0 indicates a device
786           * that is not 1394a-2000 compliant.
787           * A generation of 1 indicates a device that
788           * does not change it's Bus Info Block or
789           * Configuration ROM.
790           */
791  #define FW_MAX_GENERATION 0xF
792  	newrom = (uint32_t*)malloc(CROMSIZE);
793  	memset(newrom, 0, CROMSIZE);
794  	src = &fc->crom_src_buf->src;
795  	crom_load(src, newrom, CROMSIZE);
796  	if (bcmp(newrom, fc->config_rom, CROMSIZE) != 0) {
797  		if ( src->businfo.generation++ > FW_MAX_GENERATION )
798  			src->businfo.generation = FW_GENERATION_CHANGEABLE;
799  		bcopy(newrom, (void *)fc->config_rom, CROMSIZE);
800  	}
801  	free(newrom);
802  }
803  
804  /* Call once after reboot */
805  void fw_init(struct firewire_comm *fc)
806  {
807  	int i;
808  	char tempname[16];
809  #ifdef FW_VMACCESS
810  	struct fw_xfer *xfer;
811  	struct fw_bind *fwb;
812  #endif
813  
814  	fc->arq->queued = 0;
815  	fc->ars->queued = 0;
816  	fc->atq->queued = 0;
817  	fc->ats->queued = 0;
818  
819  	fc->arq->buf = NULL;
820  	fc->ars->buf = NULL;
821  	fc->atq->buf = NULL;
822  	fc->ats->buf = NULL;
823  
824  	fc->arq->flag = 0;
825  	fc->ars->flag = 0;
826  	fc->atq->flag = 0;
827  	fc->ats->flag = 0;
828  
829  	STAILQ_INIT(&fc->atq->q);
830  	STAILQ_INIT(&fc->ats->q);
831  
832  	fc->Sem = create_sem(0, "fc Sem");
833  
834  	for( i = 0 ; i < fc->nisodma ; i ++ ){
835  		fc->it[i]->queued = 0;
836  		fc->ir[i]->queued = 0;
837  
838  		fc->it[i]->start = NULL;
839  		fc->ir[i]->start = NULL;
840  
841  		fc->it[i]->buf = NULL;
842  		fc->ir[i]->buf = NULL;
843  
844  		fc->it[i]->flag = FWXFERQ_STREAM;
845  		fc->ir[i]->flag = FWXFERQ_STREAM;
846  
847  		STAILQ_INIT(&fc->it[i]->q);
848  		STAILQ_INIT(&fc->ir[i]->q);
849  
850  		snprintf(tempname, sizeof(tempname), "it%d ready sem", i);
851  		fc->it[i]->Sem = create_sem(0, tempname);
852  		snprintf(tempname, sizeof(tempname), "ir%d ready sem", i);
853  		fc->ir[i]->Sem = create_sem(0, tempname);
854  	}
855  
856  	fc->arq->maxq = FWMAXQUEUE;
857  	fc->ars->maxq = FWMAXQUEUE;
858  	fc->atq->maxq = FWMAXQUEUE;
859  	fc->ats->maxq = FWMAXQUEUE;
860  
861  	for( i = 0 ; i < fc->nisodma ; i++){
862  		fc->ir[i]->maxq = FWMAXQUEUE;
863  		fc->it[i]->maxq = FWMAXQUEUE;
864  	}
865  	CSRARC(fc, TOPO_MAP) = 0x3f1 << 16;
866  	CSRARC(fc, TOPO_MAP + 4) = 1;
867  	CSRARC(fc, SPED_MAP) = 0x3f1 << 16;
868  	CSRARC(fc, SPED_MAP + 4) = 1;
869  
870  	STAILQ_INIT(&fc->devices);
871  
872  /* Initialize Async handlers */
873  	STAILQ_INIT(&fc->binds);
874  	for( i = 0 ; i < 0x40 ; i++){
875  		STAILQ_INIT(&fc->tlabels[i]);
876  	}
877  
878  /* DV depend CSRs see blue book */
879  #if 0
880  	CSRARC(fc, oMPR) = 0x3fff0001; /* # output channel = 1 */
881  	CSRARC(fc, oPCR) = 0x8000007a;
882  	for(i = 4 ; i < 0x7c/4 ; i+=4){
883  		CSRARC(fc, i + oPCR) = 0x8000007a;
884  	}
885  
886  	CSRARC(fc, iMPR) = 0x00ff0001; /* # input channel = 1 */
887  	CSRARC(fc, iPCR) = 0x803f0000;
888  	for(i = 4 ; i < 0x7c/4 ; i+=4){
889  		CSRARC(fc, i + iPCR) = 0x0;
890  	}
891  #endif
892  
893  	fc->crom_src_buf = NULL;
894  
895  #ifdef FW_VMACCESS
896  	xfer = fw_xfer_alloc();
897  	if(xfer == NULL) return;
898  
899  	fwb = (struct fw_bind *)malloc(sizeof (struct fw_bind), M_FW, M_NOWAIT);
900  	if(fwb == NULL){
901  		fw_xfer_free(xfer);
902  		return;
903  	}
904  	xfer->hand = fw_vmaccess;
905  	xfer->fc = fc;
906  	xfer->sc = NULL;
907  
908  	fwb->start_hi = 0x2;
909  	fwb->start_lo = 0;
910  	fwb->addrlen = 0xffffffff;
911  	fwb->xfer = xfer;
912  	fw_bindadd(fc, fwb);
913  #endif
914  }
915  
916  #define BIND_CMP(addr, fwb) (((addr) < (fwb)->start)?-1:\
917      ((fwb)->end < (addr))?1:0)
918  
919  /*
920   * To lookup bound process from IEEE1394 address.
921   */
922  struct fw_bind *
923  fw_bindlookup(struct firewire_comm *fc, uint16_t dest_hi, uint32_t dest_lo)
924  {
925  	u_int64_t addr;
926  	struct fw_bind *tfw, *r = NULL;
927  
928  	addr = ((u_int64_t)dest_hi << 32) | dest_lo;
929  	FW_GLOCK(fc);
930  	STAILQ_FOREACH(tfw, &fc->binds, fclist)
931  		if (BIND_CMP(addr, tfw) == 0) {
932  			r = tfw;
933  			break;
934  		}
935  	FW_GUNLOCK(fc);
936  	return(r);
937  }
938  
939  /*
940   * To bind IEEE1394 address block to process.
941   */
942  int
943  fw_bindadd(struct firewire_comm *fc, struct fw_bind *fwb)
944  {
945  	struct fw_bind *tfw, *prev = NULL;
946  	int r = 0;
947  
948  	if (fwb->start > fwb->end) {
949  		printf("%s: invalid range\n", __func__);
950  		return EINVAL;
951  	}
952  
953  	FW_GLOCK(fc);
954  	STAILQ_FOREACH(tfw, &fc->binds, fclist) {
955  		if (fwb->end < tfw->start)
956  			break;
957  		prev = tfw;
958  	}
959  	if (prev == NULL)
960  		STAILQ_INSERT_HEAD(&fc->binds, fwb, fclist);
961  	else if (prev->end < fwb->start)
962  		STAILQ_INSERT_AFTER(&fc->binds, prev, fwb, fclist);
963  	else {
964  		printf("%s: bind failed\n", __func__);
965  		r = EBUSY;
966  	}
967  	FW_GUNLOCK(fc);
968  	return (r);
969  }
970  
971  /*
972   * To free IEEE1394 address block.
973   */
974  int
975  fw_bindremove(struct firewire_comm *fc, struct fw_bind *fwb)
976  {
977  #if 0
978  	struct fw_xfer *xfer, *next;
979  #endif
980  	struct fw_bind *tfw;
981  	int s;
982  
983  	s = splfw();
984  	FW_GLOCK(fc);
985  	STAILQ_FOREACH(tfw, &fc->binds, fclist)
986  		if (tfw == fwb) {
987  			STAILQ_REMOVE(&fc->binds, fwb, fw_bind, fclist);
988  			goto found;
989  		}
990  
991  	printf("%s: no such binding\n", __func__);
992  	FW_GUNLOCK(fc);
993  	splx(s);
994  	return (1);
995  found:
996  #if 0
997  	/* shall we do this? */
998  	for (xfer = STAILQ_FIRST(&fwb->xferlist); xfer != NULL; xfer = next) {
999  		next = STAILQ_NEXT(xfer, link);
1000  		fw_xfer_free(xfer);
1001  	}
1002  	STAILQ_INIT(&fwb->xferlist);
1003  #endif
1004  	FW_GUNLOCK(fc);
1005  
1006  	splx(s);
1007  	return 0;
1008  }
1009  
1010  int
1011  fw_xferlist_add(struct fw_xferlist *q, int slen, int rlen, int n,
1012      struct firewire_comm *fc, void *sc, void (*hand)(struct fw_xfer *))
1013  {
1014  	int i, s;
1015  	struct fw_xfer *xfer;
1016  
1017  	for (i = 0; i < n; i++) {
1018  		xfer = fw_xfer_alloc_buf(slen, rlen);
1019  		if (xfer == NULL)
1020  			return (n);
1021  		xfer->fc = fc;
1022  		xfer->sc = (caddr_t)sc;
1023  		xfer->hand = hand;
1024  		s = splfw();
1025  		STAILQ_INSERT_TAIL(q, xfer, link);
1026  		splx(s);
1027  	}
1028  	return (n);
1029  }
1030  
1031  void
1032  fw_xferlist_remove(struct fw_xferlist *q)
1033  {
1034  	struct fw_xfer *xfer, *next;
1035  
1036  	for (xfer = STAILQ_FIRST(q); xfer != NULL; xfer = next) {
1037                  next = STAILQ_NEXT(xfer, link);
1038                  fw_xfer_free_buf(xfer);
1039          }
1040          STAILQ_INIT(q);
1041  }
1042  /*
1043   * dump packet header
1044   */
1045  static void
1046  fw_dump_hdr(struct fw_pkt *fp, const char *prefix)
1047  {
1048  	printf("%s: dst=0x%02x tl=0x%02x rt=%d tcode=0x%x pri=0x%x "
1049  	    "src=0x%03x\n", prefix,
1050  	    fp->mode.hdr.dst & 0x3f,
1051  	    fp->mode.hdr.tlrt >> 2, fp->mode.hdr.tlrt & 3,
1052  	    fp->mode.hdr.tcode, fp->mode.hdr.pri,
1053  	    fp->mode.hdr.src);
1054  }
1055  
1056  /*
1057   * To free transaction label.
1058   */
1059  static void
1060  fw_tl_free(struct firewire_comm *fc, struct fw_xfer *xfer)
1061  {
1062  	struct fw_xfer *txfer;
1063  	int s;
1064  
1065  	if (xfer->tl < 0)
1066  		return;
1067  
1068  	s = splfw();
1069  	mtx_lock(&fc->tlabel_lock);
1070  #if 1	/* make sure the label is allocated */
1071  	STAILQ_FOREACH(txfer, &fc->tlabels[xfer->tl], tlabel)
1072  		if(txfer == xfer)
1073  			break;
1074  	if (txfer == NULL) {
1075  		printf("%s: the xfer is not in the queue "
1076  		    "(tlabel=%d, flag=0x%x)\n",
1077  		    __FUNCTION__, xfer->tl, xfer->flag);
1078  		fw_dump_hdr(&xfer->send.hdr, "send");
1079  		fw_dump_hdr(&xfer->recv.hdr, "recv");
1080  //		kdb_backtrace();
1081  		mtx_unlock(&fc->tlabel_lock);
1082  		splx(s);
1083  		return;
1084  	}
1085  #endif
1086  
1087  	STAILQ_REMOVE(&fc->tlabels[xfer->tl], xfer, fw_xfer, tlabel);
1088  	mtx_unlock(&fc->tlabel_lock);
1089  	splx(s);
1090  	return;
1091  }
1092  
1093  /*
1094   * To obtain XFER structure by transaction label.
1095   */
1096  static struct fw_xfer *
1097  fw_tl2xfer(struct firewire_comm *fc, int node, int tlabel, int tcode)
1098  {
1099  	struct fw_xfer *xfer;
1100  	int s;
1101  	int req;
1102  
1103  	s = splfw();
1104  
1105  	mtx_lock(&fc->tlabel_lock);
1106  	STAILQ_FOREACH(xfer, &fc->tlabels[tlabel], tlabel)
1107  		if((uint)xfer->send.hdr.mode.hdr.dst == (uint)node) {
1108  			mtx_unlock(&fc->tlabel_lock);
1109  			splx(s);
1110  			KASSERT(xfer->tl == tlabel,
1111  				("xfer->tl 0x%x != 0x%x", xfer->tl, tlabel));
1112  			/* extra sanity check */
1113  			req = xfer->send.hdr.mode.hdr.tcode;
1114  			if (xfer->fc->tcode[req].valid_res != tcode) {
1115  				printf("%s: invalid response tcode "
1116  				    "(0x%x for 0x%x)\n", __FUNCTION__,
1117  				    tcode, req);
1118  				return(NULL);
1119  			}
1120  
1121  			if (firewire_debug > 2)
1122  				printf("fw_tl2xfer: found tl=%d\n", tlabel);
1123  			return(xfer);
1124  		}
1125  	mtx_unlock(&fc->tlabel_lock);
1126  	if (firewire_debug > 1)
1127  		printf("fw_tl2xfer: not found tl=%d\n", tlabel);
1128  	splx(s);
1129  	return(NULL);
1130  }
1131  
1132  /*
1133   * To allocate IEEE1394 XFER structure.
1134   */
1135  struct fw_xfer *
1136  fw_xfer_alloc()
1137  {
1138  	struct fw_xfer *xfer;
1139  
1140  	xfer = (fw_xfer*)malloc(sizeof(struct fw_xfer));
1141  	if (xfer == NULL)
1142  		return xfer;
1143  	memset(xfer, 0, sizeof(struct fw_xfer));
1144  
1145  	xfer->Sem = create_sem(0, "xfer ready sem");
1146  
1147  //	xfer->malloc = type;
1148  
1149  	return xfer;
1150  }
1151  
1152  struct fw_xfer *
1153  fw_xfer_alloc_buf(int send_len, int recv_len)
1154  {
1155  	struct fw_xfer *xfer;
1156  	void *send_virt, *send_phy, *recv_virt, *recv_phy;
1157  
1158  	xfer = fw_xfer_alloc();
1159  	if (xfer == NULL)
1160  		return(NULL);
1161  	xfer->send.pay_len = send_len;
1162  	xfer->recv.pay_len = recv_len;
1163  	if (send_len > 0) {
1164  /*		xfer->send.payload = malloc(send_len);
1165  		if (xfer->send.payload == NULL) {
1166  			fw_xfer_free(xfer);
1167  			return(NULL);
1168  		}
1169  		memset(xfer->send.payload 0, send_len);*/
1170  		xfer->send.payArea = alloc_mem(&send_virt, &send_phy,
1171  				send_len, 0, "firewire tx buf");
1172  		if (xfer->send.payArea < B_OK){
1173  			fw_xfer_free(xfer);
1174  			return(NULL);
1175  		}
1176  		xfer->send.payload = (uint32_t *)send_virt;
1177  		xfer->send.bus_addr = (bus_addr_t)send_phy;
1178  	}
1179  	if (recv_len > 0) {
1180  /*		xfer->recv.payload = malloc(recv_len);
1181  		if (xfer->recv.payload == NULL) {
1182  			if (xfer->send.payload != NULL)
1183  				free(xfer->send.payload);
1184  			fw_xfer_free(xfer);
1185  			return(NULL);
1186  		}*/
1187  		xfer->recv.payArea = alloc_mem(&recv_virt, &recv_phy,
1188  				recv_len, 0, "firewire rx buf");
1189  		if (xfer->recv.payArea < B_OK){
1190  			if (xfer->send.payArea > B_OK){
1191  				delete_area(xfer->send.payArea);
1192  				xfer->send.payArea = -1;
1193  			}
1194  
1195  			fw_xfer_free(xfer);
1196  			return(NULL);
1197  		}
1198  		xfer->recv.payload = (uint32_t *)recv_virt;
1199  		xfer->recv.bus_addr = (bus_addr_t)recv_phy;
1200  	}
1201  	return(xfer);
1202  }
1203  
1204  /*
1205   * IEEE1394 XFER post process.
1206   */
1207  void
1208  fw_xfer_done(struct fw_xfer *xfer)
1209  {
1210  	if (xfer->hand == NULL) {
1211  		printf("hand == NULL\n");
1212  		return;
1213  	}
1214  
1215  	if (xfer->fc == NULL)
1216  		panic("fw_xfer_done: why xfer->fc is NULL?");
1217  
1218  	fw_tl_free(xfer->fc, xfer);
1219  	xfer->hand(xfer);
1220  }
1221  
1222  void
1223  fw_xfer_unload(struct fw_xfer* xfer)
1224  {
1225  	int s;
1226  
1227  	if(xfer == NULL ) return;
1228  	if(xfer->flag & FWXF_INQ){
1229  		printf("fw_xfer_free FWXF_INQ\n");
1230  		s = splfw();
1231  		FW_GLOCK(xfer->fc);
1232  		STAILQ_REMOVE(&xfer->q->q, xfer, fw_xfer, link);
1233  #if 0
1234  		xfer->q->queued --;
1235  #endif
1236  		FW_GUNLOCK(xfer->fc);
1237  		splx(s);
1238  	}
1239  	if (xfer->fc != NULL) {
1240  #if 1
1241  		if(xfer->flag & FWXF_START)
1242  			/*
1243  			 * This could happen if:
1244  			 *  1. We call fwohci_arcv() before fwohci_txd().
1245  			 *  2. firewire_watch() is called.
1246  			 */
1247  			printf("fw_xfer_free FWXF_START\n");
1248  #endif
1249  	}
1250  	xfer->flag = FWXF_INIT;
1251  	xfer->resp = 0;
1252  }
1253  /*
1254   * To free IEEE1394 XFER structure.
1255   */
1256  void
1257  fw_xfer_free_buf( struct fw_xfer* xfer)
1258  {
1259  	if (xfer == NULL) {
1260  		printf("%s: xfer == NULL\n", __func__);
1261  		return;
1262  	}
1263  	fw_xfer_unload(xfer);
1264  /*	if(xfer->send.payload != NULL){
1265  		free(xfer->send.payload);
1266  	}
1267  	if(xfer->recv.payload != NULL){
1268  		free(xfer->recv.payload);
1269  	}*/
1270  	if (xfer->send.payArea > B_OK){
1271  		delete_area(xfer->send.payArea);
1272  		xfer->send.payArea = -1;
1273  	}
1274  	if (xfer->recv.payArea > B_OK){
1275  		delete_area(xfer->recv.payArea);
1276  		xfer->recv.payArea = -1;
1277  	}
1278  	delete_sem(xfer->Sem);
1279  	free(xfer);
1280  }
1281  
1282  void
1283  fw_xfer_free( struct fw_xfer* xfer)
1284  {
1285  	if (xfer == NULL) {
1286  		printf("%s: xfer == NULL\n", __func__);
1287  		return;
1288  	}
1289  	delete_sem(xfer->Sem);
1290  	fw_xfer_unload(xfer);
1291  	free(xfer);
1292  }
1293  
1294  void
1295  fw_asy_callback_free(struct fw_xfer *xfer)
1296  {
1297  #if 0
1298  	printf("asyreq done flag=0x%02x resp=%d\n",
1299  				xfer->flag, xfer->resp);
1300  #endif
1301  	fw_xfer_free(xfer);
1302  }
1303  
1304  /*
1305   * To configure PHY.
1306   */
1307  static void
1308  fw_phy_config(struct firewire_comm *fc, int root_node, int gap_count)
1309  {
1310  	struct fw_xfer *xfer;
1311  	struct fw_pkt *fp;
1312  
1313  	fc->status = FWBUSPHYCONF;
1314  
1315  	xfer = fw_xfer_alloc();
1316  	if (xfer == NULL)
1317  		return;
1318  	xfer->fc = fc;
1319  	xfer->hand = fw_asy_callback_free;
1320  
1321  	fp = &xfer->send.hdr;
1322  	fp->mode.ld[1] = 0;
1323  	if (root_node >= 0)
1324  		fp->mode.ld[1] |= (root_node & 0x3f) << 24 | 1 << 23;
1325  	if (gap_count >= 0)
1326  		fp->mode.ld[1] |= 1 << 22 | (gap_count & 0x3f) << 16;
1327  	fp->mode.ld[2] = ~fp->mode.ld[1];
1328  /* XXX Dangerous, how to pass PHY packet to device driver */
1329  	fp->mode.common.tcode |= FWTCODE_PHY;
1330  
1331  	if (firewire_debug)
1332  		device_printf(fc->bdev, "%s: root_node=%d gap_count=%d\n",
1333  			 __func__, root_node, gap_count);
1334  	fw_asyreq(fc, -1, xfer);
1335  }
1336  
1337  /*
1338   * Dump self ID.
1339   */
1340  static void
1341  fw_print_sid(uint32_t sid)
1342  {
1343  	union fw_self_id *s;
1344  	s = (union fw_self_id *) &sid;
1345  	if ( s->p0.sequel ) {
1346  		if ( s->p1.sequence_num == FW_SELF_ID_PAGE0 ) {
1347  			printf("node:%d p3:%d p4:%d p5:%d p6:%d p7:%d"
1348  				"p8:%d p9:%d p10:%d\n",
1349  				s->p1.phy_id, s->p1.port3, s->p1.port4,
1350  				s->p1.port5, s->p1.port6, s->p1.port7,
1351  				s->p1.port8, s->p1.port9, s->p1.port10);
1352  		} else if (s->p2.sequence_num == FW_SELF_ID_PAGE1 ){
1353  			printf("node:%d p11:%d p12:%d p13:%d p14:%d p15:%d\n",
1354  				s->p2.phy_id, s->p2.port11, s->p2.port12,
1355  				s->p2.port13, s->p2.port14, s->p2.port15);
1356  		} else {
1357  			printf("node:%d Unknown Self ID Page number %d\n",
1358  				s->p1.phy_id, s->p1.sequence_num);
1359  		}
1360  	} else {
1361  		printf("node:%d link:%d gap:%d spd:%d con:%d pwr:%d"
1362  			" p0:%d p1:%d p2:%d i:%d m:%d\n",
1363  			s->p0.phy_id, s->p0.link_active, s->p0.gap_count,
1364  			s->p0.phy_speed, s->p0.contender,
1365  			s->p0.power_class, s->p0.port0, s->p0.port1,
1366  			s->p0.port2, s->p0.initiated_reset, s->p0.more_packets);
1367  	}
1368  }
1369  
1370  /*
1371   * To receive self ID.
1372   */
1373  void fw_sidrcv(struct firewire_comm* fc, uint32_t *sid, u_int len)
1374  {
1375  	uint32_t *p;
1376  	union fw_self_id *self_id;
1377  	u_int i, j, node, c_port = 0, i_branch = 0;
1378  
1379  	fc->sid_cnt = len /(sizeof(uint32_t) * 2);
1380  	fc->max_node = fc->nodeid & 0x3f;
1381  	CSRARC(fc, NODE_IDS) = ((uint32_t)fc->nodeid) << 16;
1382  	fc->status = FWBUSCYMELECT;
1383  	fc->topology_map->crc_len = 2;
1384  	fc->topology_map->generation ++;
1385  	fc->topology_map->self_id_count = 0;
1386  	fc->topology_map->node_count = 0;
1387  	fc->speed_map->generation ++;
1388  	fc->speed_map->crc_len = 1 + (64*64 + 3) / 4;
1389  	self_id = &fc->topology_map->self_id[0];
1390  	for(i = 0; i < fc->sid_cnt; i ++){
1391  		if (sid[1] != ~sid[0]) {
1392  			device_printf(fc->bdev, "%s:"
1393  				"ERROR invalid self-id packet\n", __func__);
1394  			sid += 2;
1395  			continue;
1396  		}
1397  		*self_id = *((union fw_self_id *)sid);
1398  		(void)(fc->topology_map->crc_len++);
1399  		if(self_id->p0.sequel == 0){
1400  			(void)(fc->topology_map->node_count++);
1401  			c_port = 0;
1402  			if (firewire_debug)
1403  				fw_print_sid(sid[0]);
1404  
1405  			node = self_id->p0.phy_id;
1406  			if(fc->max_node < node){
1407  				fc->max_node = self_id->p0.phy_id;
1408  			}
1409  			/* XXX I'm not sure this is the right speed_map */
1410  			fc->speed_map->speed[node][node]
1411  					= self_id->p0.phy_speed;
1412  			for (j = 0; j < node; j ++) {
1413  				fc->speed_map->speed[j][node]
1414  					= fc->speed_map->speed[node][j]
1415  					= min_c(fc->speed_map->speed[j][j],
1416  							self_id->p0.phy_speed);
1417  			}
1418  			if ((fc->irm == (u_int)-1 || self_id->p0.phy_id > fc->irm) &&
1419  			  (self_id->p0.link_active && self_id->p0.contender)) {
1420  				fc->irm = self_id->p0.phy_id;
1421  			}
1422  			if(self_id->p0.port0 >= 0x2){
1423  				c_port++;
1424  			}
1425  			if(self_id->p0.port1 >= 0x2){
1426  				c_port++;
1427  			}
1428  			if(self_id->p0.port2 >= 0x2){
1429  				c_port++;
1430  			}
1431  		}
1432  		if(c_port > 2){
1433  			i_branch += (c_port - 2);
1434  		}
1435  		sid += 2;
1436  		self_id++;
1437  		(void)(fc->topology_map->self_id_count++);
1438  	}
1439  	/* CRC */
1440  	fc->topology_map->crc = fw_crc16(
1441  			(uint32_t *)&fc->topology_map->generation,
1442  			fc->topology_map->crc_len * 4);
1443  	fc->speed_map->crc = fw_crc16(
1444  			(uint32_t *)&fc->speed_map->generation,
1445  			fc->speed_map->crc_len * 4);
1446  	/* byteswap and copy to CSR */
1447  	p = (uint32_t *)fc->topology_map;
1448  	for (i = 0; i <= fc->topology_map->crc_len; i++)
1449  		CSRARC(fc, TOPO_MAP + i * 4) = htonl(*p++);
1450  	p = (uint32_t *)fc->speed_map;
1451  	CSRARC(fc, SPED_MAP) = htonl(*p++);
1452  	CSRARC(fc, SPED_MAP + 4) = htonl(*p++);
1453  	/* don't byte-swap uint8_t array */
1454  	bcopy(p, &CSRARC(fc, SPED_MAP + 8), (fc->speed_map->crc_len - 1)*4);
1455  
1456  	fc->max_hop = fc->max_node - i_branch;
1457  	device_printf(fc->bdev, "%d nodes, maxhop <= %d %s irm(%d) %s\n",
1458  		fc->max_node + 1, fc->max_hop,
1459  		(fc->irm == (u_int)-1) ? "Not IRM capable" : "cable IRM",
1460  		fc->irm,
1461  		(fc->irm == fc->nodeid) ? " (me) " : "");
1462  
1463  	if (try_bmr && (fc->irm != (u_int)-1) && (CSRARC(fc, BUS_MGR_ID) == 0x3f)) {
1464  		if (fc->irm == fc->nodeid) {
1465  			fc->status = FWBUSMGRDONE;
1466  			CSRARC(fc, BUS_MGR_ID) = fc->set_bmr(fc, fc->irm);
1467  			fw_bmr(fc);
1468  		} else {
1469  			fc->status = FWBUSMGRELECT;
1470  //			callout_reset(&fc->bmr_callout, hz/8,
1471  //				(void *)fw_try_bmr, (void *)fc);
1472  			fc->bmr_callout = create_timer(fw_try_bmr, fc,
1473  					hz/8, B_ONE_SHOT_RELATIVE_TIMER);
1474  		}
1475  	} else
1476  		fc->status = FWBUSMGRDONE;
1477  
1478  //	callout_reset(&fc->busprobe_callout, hz/4,
1479  //			(void *)fw_bus_probe, (void *)fc);
1480  	fc->busprobe_callout = create_timer(fw_bus_probe, fc,
1481  			hz/4, B_ONE_SHOT_RELATIVE_TIMER);
1482  }
1483  
1484  /*
1485   * To probe devices on the IEEE1394 bus.
1486   */
1487  static void
1488  fw_bus_probe(void *arg)
1489  {
1490  	int s;
1491  	struct firewire_comm *fc = (struct firewire_comm *)arg;
1492  	struct fw_device *fwdev;
1493  
1494  	s = splfw();
1495  	fc->status = FWBUSEXPLORE;
1496  
1497  	/* Invalidate all devices, just after bus reset. */
1498  	if (firewire_debug)
1499  		device_printf(fc->bdev, "%s:"
1500  			"iterate and invalidate all nodes\n",
1501  			__func__);
1502  	STAILQ_FOREACH(fwdev, &fc->devices, link)
1503  		if (fwdev->status != FWDEVINVAL) {
1504  			fwdev->status = FWDEVINVAL;
1505  			fwdev->rcnt = 0;
1506  			if (firewire_debug)
1507  				device_printf(fc->bdev, "%s:"
1508  					"Invalidate Dev ID: %08x%08x\n",
1509  					__func__, fwdev->eui.hi, fwdev->eui.lo);
1510  		} else {
1511  			if (firewire_debug)
1512  				device_printf(fc->bdev, "%s:"
1513  					"Dev ID: %08x%08x already invalid\n",
1514  					__func__, fwdev->eui.hi, fwdev->eui.lo);
1515  
1516  		}
1517  	splx(s);
1518  
1519  //	wakeup((void *)fc);
1520  	release_sem(fc->Sem);
1521  }
1522  
1523  static int
1524  fw_explore_read_quads(struct fw_device *fwdev, int offset,
1525      uint32_t *quad, int length)
1526  {
1527  	struct fw_xfer *xfer;
1528  	uint32_t tmp;
1529  	int i, error;
1530  
1531  	for (i = 0; i < length; i ++, offset += sizeof(uint32_t)) {
1532  		xfer = fwmem_read_quad(fwdev, NULL, (uint8_t)-1,
1533  		    0xffff, 0xf0000000 | offset, (void *)&tmp,
1534  		    fw_xferwake);
1535  		if (xfer == NULL)
1536  			return (-1);
1537  		fw_xferwait(xfer);
1538  
1539  		if (xfer->resp == 0)
1540  			quad[i] = ntohl(tmp);
1541  
1542  		error = xfer->resp;
1543  		fw_xfer_free(xfer);
1544  		if (error)
1545  			return (error);
1546  	}
1547  	return (0);
1548  }
1549  
1550  
1551  static int
1552  fw_explore_csrblock(struct fw_device *fwdev, int offset, int recur)
1553  {
1554  	int err, i, off;
1555  	struct csrdirectory *dir;
1556  	struct csrreg *reg;
1557  
1558  	dir = (struct csrdirectory *)&fwdev->csrrom[offset/sizeof(uint32_t)];
1559  	err = fw_explore_read_quads(fwdev, CSRROMOFF + offset,
1560  	    (uint32_t *)dir, 1);
1561  	if (err)
1562  		return (-1);
1563  
1564  	offset += sizeof(uint32_t);
1565  	reg = (struct csrreg *)&fwdev->csrrom[offset/sizeof(uint32_t)];
1566  	err = fw_explore_read_quads(fwdev, CSRROMOFF + offset,
1567  	    (uint32_t *)reg, dir->crc_len);
1568  	if (err)
1569  		return (-1);
1570  
1571  	/* XXX check CRC */
1572  
1573  	off = CSRROMOFF + offset + sizeof(uint32_t) * (dir->crc_len - 1);
1574  	if (fwdev->rommax < off)
1575  		fwdev->rommax = off;
1576  
1577  	if (recur == 0)
1578  		return (0);
1579  
1580  	for (i = 0; (uint)i < dir->crc_len; i ++, offset += sizeof(uint32_t)) {
1581  		if ((reg[i].key & CSRTYPE_MASK) == CSRTYPE_D)
1582  			recur = 1;
1583  		else if ((reg[i].key & CSRTYPE_MASK) == CSRTYPE_L)
1584  			recur = 0;
1585  		else
1586  			continue;
1587  
1588  		off = offset + reg[i].val * sizeof(uint32_t);
1589  		if (off > CROMSIZE) {
1590  			printf("%s: invalid offset %d\n", __FUNCTION__, off);
1591  			return(-1);
1592  		}
1593  		err = fw_explore_csrblock(fwdev, off, recur);
1594  		if (err)
1595  			return (-1);
1596  	}
1597  	return (0);
1598  }
1599  
1600  static int
1601  fw_explore_node(struct fw_device *dfwdev)
1602  {
1603  	struct firewire_comm *fc;
1604  	struct fw_device *fwdev, *pfwdev, *tfwdev;
1605  	uint32_t *csr;
1606  	struct csrhdr *hdr;
1607  	struct bus_info *binfo;
1608  	int err, node;
1609  	uint32_t speed_test = 0;
1610  
1611  	fc = dfwdev->fc;
1612  	csr = dfwdev->csrrom;
1613  	node = dfwdev->dst;
1614  
1615  	/* First quad */
1616  	err = fw_explore_read_quads(dfwdev, CSRROMOFF, &csr[0], 1);
1617  	if (err) {
1618  		device_printf(fc->bdev, "%s: node%d: explore_read_quads failure\n",
1619  			__func__, node);
1620  		dfwdev->status = FWDEVINVAL;
1621  		return (-1);
1622  	}
1623  	hdr = (struct csrhdr *)&csr[0];
1624  	if (hdr->info_len != 4) {
1625  		if (firewire_debug)
1626  			device_printf(fc->bdev, "%s:"
1627  				" node%d: wrong bus info len(%d)\n",
1628  			       	__func__, node, hdr->info_len);
1629  		dfwdev->status = FWDEVINVAL;
1630  		return (-1);
1631  	}
1632  
1633  	/* bus info */
1634  	err = fw_explore_read_quads(dfwdev, CSRROMOFF + 0x04, &csr[1], 4);
1635  	if (err) {
1636  		device_printf(fc->bdev, "%s: node%d: error reading 0x04\n",
1637  			__func__, node);
1638  		dfwdev->status = FWDEVINVAL;
1639  		return (-1);
1640  	}
1641  	binfo = (struct bus_info *)&csr[1];
1642  	if (binfo->bus_name != CSR_BUS_NAME_IEEE1394) {
1643  		device_printf(fc->bdev, "%s: node%d: invalid bus name 0x%08x\n",
1644  			__func__, node, binfo->bus_name);
1645  		dfwdev->status = FWDEVINVAL;
1646  		return (-1);
1647  	}
1648  
1649  	if (firewire_debug)
1650  		device_printf(fc->bdev, "%s: node(%d) BUS INFO BLOCK:\n"
1651  			"irmc(%d) cmc(%d) isc(%d) bmc(%d) pmc(%d) "
1652  			"cyc_clk_acc(%d) max_rec(%d) max_rom(%d) "
1653  			"generation(%d) link_spd(%d)\n",
1654  			__func__, node,
1655  			binfo->irmc, binfo->cmc, binfo->isc,
1656  			binfo->bmc, binfo->pmc, binfo->cyc_clk_acc,
1657  			binfo->max_rec, binfo->max_rom,
1658  			binfo->generation, binfo->link_spd);
1659  
1660  	STAILQ_FOREACH(fwdev, &fc->devices, link)
1661  		if (FW_EUI64_EQUAL(fwdev->eui, binfo->eui64))
1662  			break;
1663  	if (fwdev == NULL) {
1664  		/* new device */
1665  		fwdev = (fw_device*)malloc(sizeof(struct fw_device));
1666  		if (fwdev == NULL) {
1667  			device_printf(fc->bdev, "%s: node%d: no memory\n",
1668  				__func__, node);
1669  			return (-1);
1670  		}
1671  		memset(fwdev, 0, sizeof(struct fw_device));
1672  		fwdev->fc = fc;
1673  		fwdev->eui = binfo->eui64;
1674  		fwdev->dst = dfwdev->dst;
1675  		fwdev->maxrec = dfwdev->maxrec;
1676  		fwdev->status = dfwdev->status;
1677  
1678  		/*
1679  		 * Pre-1394a-2000 didn't have link_spd in
1680  		 * the Bus Info block, so try and use the
1681  		 * speed map value.
1682  		 * 1394a-2000 compliant devices only use
1683  		 * the Bus Info Block link spd value, so
1684  		 * ignore the speed map alltogether. SWB
1685  		 */
1686  		if ( binfo->link_spd == FWSPD_S100 /* 0 */) {
1687  			device_printf(fc->bdev, "%s: "
1688  				"Pre 1394a-2000 detected\n",
1689  				__func__);
1690  			fwdev->speed = fc->speed_map->speed[fc->nodeid][node];
1691  		} else
1692  			fwdev->speed = binfo->link_spd;
1693  		/*
1694  		 * Test this speed with a read to the CSRROM.
1695  		 * If it fails, slow down the speed and retry.
1696  		 */
1697  		while (fwdev->speed > FWSPD_S100 /* 0 */) {
1698  			err = fw_explore_read_quads(fwdev, CSRROMOFF,
1699              				&speed_test, 1);
1700  			if (err) {
1701  				device_printf(fc->bdev, "%s: fwdev->speed(%s)"
1702  					" decremented due to negotiation\n",
1703  					 __func__,
1704  					  linkspeed[fwdev->speed]);
1705  				fwdev->speed--;
1706  			} else
1707  				break;
1708  
1709  		}
1710  		/* inesrt into sorted fwdev list */
1711  		pfwdev = NULL;
1712  		STAILQ_FOREACH(tfwdev, &fc->devices, link) {
1713  			if (tfwdev->eui.hi > fwdev->eui.hi ||
1714  				(tfwdev->eui.hi == fwdev->eui.hi &&
1715  				tfwdev->eui.lo > fwdev->eui.lo))
1716  				break;
1717  			pfwdev = tfwdev;
1718  		}
1719  		if (pfwdev == NULL)
1720  			STAILQ_INSERT_HEAD(&fc->devices, fwdev, link);
1721  		else
1722  			STAILQ_INSERT_AFTER(&fc->devices, pfwdev, fwdev, link);
1723  
1724  		device_printf(fc->bdev, "New %s device ID:%08x%08x\n",
1725  		    linkspeed[fwdev->speed],
1726  		    fwdev->eui.hi, fwdev->eui.lo);
1727  	} else {
1728  		fwdev->dst = node;
1729  		fwdev->status = FWDEVINIT;
1730  		/* unchanged ? */
1731  		if (bcmp(&csr[0], &fwdev->csrrom[0], sizeof(uint32_t) * 5) == 0) {
1732  			if (firewire_debug)
1733  				device_printf(fc->dev, "node%d: crom unchanged\n", node);
1734  			return (0);
1735  		}
1736  	}
1737  
1738  	bzero(&fwdev->csrrom[0], CROMSIZE);
1739  
1740  	/* copy first quad and bus info block */
1741  	bcopy(&csr[0], &fwdev->csrrom[0], sizeof(uint32_t) * 5);
1742  	fwdev->rommax = CSRROMOFF + sizeof(uint32_t) * 4;
1743  
1744  	err = fw_explore_csrblock(fwdev, 0x14, 1); /* root directory */
1745  
1746  	if (err) {
1747  		if (firewire_debug)
1748  			device_printf(fc->dev, "%s:"
1749  				" explore csrblock failed err(%d)\n",
1750  				__func__, err);
1751  		fwdev->status = FWDEVINVAL;
1752  		fwdev->csrrom[0] = 0;
1753  	}
1754  	return (err);
1755  
1756  }
1757  
1758  /*
1759   * Find the self_id packet for a node, ignoring sequels.
1760   */
1761  static union fw_self_id *
1762  fw_find_self_id(struct firewire_comm *fc, int node)
1763  {
1764  	uint32_t i;
1765  	union fw_self_id *s;
1766  
1767  	for (i = 0; i < fc->topology_map->self_id_count; i++) {
1768  		s = &fc->topology_map->self_id[i];
1769  		if (s->p0.sequel)
1770  			continue;
1771  		if ((int)s->p0.phy_id == node)
1772  			return s;
1773  	}
1774  	return 0;
1775  }
1776  
1777  static void
1778  fw_explore(struct firewire_comm *fc)
1779  {
1780  	int node, err, s, i, todo, todo2, trys;
1781  	char nodes[63];
1782  	struct fw_device dfwdev;
1783  	union fw_self_id *fwsid;
1784  
1785  	todo = 0;
1786  	/* setup dummy fwdev */
1787  	dfwdev.fc = fc;
1788  	dfwdev.speed = 0;
1789  	dfwdev.maxrec = 8; /* 512 */
1790  	dfwdev.status = FWDEVINIT;
1791  
1792  	for (node = 0; (uint)node <= fc->max_node; node ++) {
1793  		/* We don't probe myself and linkdown nodes */
1794  		if (node == fc->nodeid) {
1795  			if (firewire_debug)
1796  				device_printf(fc->bdev, "%s:"
1797  					" found myself node(%d) fc->nodeid(%d)"
1798  					" fc->max_node(%d)\n",
1799  					__func__, node, fc->nodeid, fc->max_node);
1800  
1801  			continue;
1802  		} else if (firewire_debug) {
1803  			device_printf(fc->bdev, "%s:"
1804  				"node(%d) fc->max_node(%d) found\n",
1805  				__func__, node, fc->max_node);
1806  		}
1807  
1808  		fwsid = fw_find_self_id(fc, node);
1809  		if (!fwsid || !fwsid->p0.link_active) {
1810  			if (firewire_debug)
1811  				device_printf(fc->bdev, "%s: node%d: link down\n",
1812  					__func__, node);
1813  			continue;
1814  		}
1815  		nodes[todo++] = node;
1816  	}
1817  
1818  	s = splfw();
1819  	for (trys = 0; todo > 0 && trys < 3; trys ++) {
1820  		todo2 = 0;
1821  		for (i = 0; i < todo; i ++) {
1822  			dfwdev.dst = nodes[i];
1823  			err = fw_explore_node(&dfwdev);
1824  			if (err)
1825  				nodes[todo2++] = nodes[i];
1826  			if (firewire_debug)
1827  				device_printf(fc->bdev, "%s: node %d, err = %d\n",
1828  					__func__, node, err);
1829  		}
1830  		todo = todo2;
1831  	}
1832  	splx(s);
1833  }
1834  
1835  
1836  static int32
1837  fw_bus_probe_thread(void *arg)
1838  {
1839  	struct firewire_comm *fc;
1840  
1841  	fc = (struct firewire_comm *)arg;
1842  	mtx_lock(&fc->wait_lock);
1843  	while (fc->status != (uint32_t)FWBUSDETACH) {
1844  		if (fc->status == FWBUSEXPLORE) {
1845  			mtx_unlock(&fc->wait_lock);
1846  			fw_explore(fc);
1847  			fc->status = FWBUSEXPDONE;
1848  			if (firewire_debug)
1849  				printf("bus_explore done\n");
1850  			fw_attach_dev(fc);
1851  			mtx_lock(&fc->wait_lock);
1852  		}
1853  //		msleep((void *)fc, &fc->wait_lock, PWAIT|PCATCH, "-", 0);
1854  		mtx_unlock(&fc->wait_lock);
1855  		acquire_sem(fc->Sem);
1856  		mtx_lock(&fc->wait_lock);
1857  
1858  	}
1859  	mtx_unlock(&fc->wait_lock);
1860  //	kproc_exit(0);
1861  	return 0;
1862  }
1863  
1864  /*
1865   * To attach sub-devices layer onto IEEE1394 bus.
1866   */
1867  static void
1868  fw_attach_dev(struct firewire_comm *fc)
1869  {
1870  	struct fw_device *fwdev, *next;
1871  //	int i, err;
1872  //	device_t *devlistp;
1873  //	int devcnt;
1874  	struct firewire_dev_comm *fdc;
1875  	struct firewire_child_info *element = fc->childList;
1876  
1877  	for (fwdev = STAILQ_FIRST(&fc->devices); fwdev != NULL; fwdev = next) {
1878  		next = STAILQ_NEXT(fwdev, link);
1879  		if (fwdev->status == FWDEVINIT) {
1880  			fwdev->status = FWDEVATTACHED;
1881  		} else if (fwdev->status == FWDEVINVAL) {
1882  			fwdev->rcnt ++;
1883  			if (firewire_debug)
1884  				device_printf(fc->bdev, "%s:"
1885  					"fwdev->rcnt(%d), hold_count(%d)\n",
1886  					__func__, fwdev->rcnt, hold_count);
1887  			if (fwdev->rcnt > hold_count) {
1888  				/*
1889  				 * Remove devices which have not been seen
1890  				 * for a while.
1891  				 */
1892  				device_printf(fc->bdev, "%s:"
1893  					"Removing missing device ID:%08x%08x\n",
1894  					__func__, fwdev->eui.hi, fwdev->eui.lo);
1895  				STAILQ_REMOVE(&fc->devices, fwdev, fw_device,
1896  				    link);
1897  				free(fwdev);
1898  			}
1899  		}
1900  	}
1901  
1902  /*	err = device_get_children(fc->bdev, &devlistp, &devcnt);
1903  	if( err == 0 ) {
1904  		for( i = 0 ; i < devcnt ; i++){
1905  			if (device_get_state(devlistp[i]) >= DS_ATTACHED)  {
1906  				fdc = device_get_softc(devlistp[i]);
1907  				if (fdc->post_explore != NULL)
1908  					fdc->post_explore(fdc);
1909  			}
1910  		}
1911  		free(devlistp, M_TEMP);
1912  	}*/
1913  
1914  	while(element){
1915  //		fdc = &element->cookie.fd;
1916  		fdc = (struct firewire_dev_comm *)element->cookie;
1917  		if (fdc->post_explore != NULL)
1918  			fdc->post_explore(fdc);
1919  		element = element->link;
1920  	}
1921  
1922  
1923  	return;
1924  }
1925  
1926  /*
1927   * To allocate unique transaction label.
1928   */
1929  static int
1930  fw_get_tlabel(struct firewire_comm *fc, struct fw_xfer *xfer)
1931  {
1932  	u_int dst, new_tlabel;
1933  	struct fw_xfer *txfer;
1934  	int s;
1935  
1936  	dst = xfer->send.hdr.mode.hdr.dst & 0x3f;
1937  	s = splfw();
1938  	mtx_lock(&fc->tlabel_lock);
1939  	new_tlabel = (fc->last_tlabel[dst] + 1) & 0x3f;
1940  	STAILQ_FOREACH(txfer, &fc->tlabels[new_tlabel], tlabel)
1941  		if ((txfer->send.hdr.mode.hdr.dst & 0x3f) == dst)
1942  				break;
1943  	if(txfer == NULL) {
1944  		fc->last_tlabel[dst] = new_tlabel;
1945  		STAILQ_INSERT_TAIL(&fc->tlabels[new_tlabel], xfer, tlabel);
1946  		mtx_unlock(&fc->tlabel_lock);
1947  		splx(s);
1948  		xfer->tl = new_tlabel;
1949  		xfer->send.hdr.mode.hdr.tlrt = new_tlabel << 2;
1950  		if (firewire_debug > 1)
1951  			printf("fw_get_tlabel: dst=%d tl=%d\n", dst, new_tlabel);
1952  		return (new_tlabel);
1953  	}
1954  	mtx_unlock(&fc->tlabel_lock);
1955  	splx(s);
1956  
1957  	if (firewire_debug > 1)
1958  		printf("fw_get_tlabel: no free tlabel\n");
1959  	return (-1);
1960  }
1961  
1962  static void
1963  fw_rcv_copy(struct fw_rcv_buf *rb)
1964  {
1965  	struct fw_pkt *pkt;
1966  	u_char *p;
1967  	struct tcode_info *tinfo;
1968  	u_int res, i, len, plen;
1969  
1970  	rb->xfer->recv.spd = rb->spd;
1971  
1972  	pkt = (struct fw_pkt *)rb->vec->iov_base;
1973  	tinfo = &rb->fc->tcode[pkt->mode.hdr.tcode];
1974  
1975  	/* Copy header */
1976  	p = (u_char *)&rb->xfer->recv.hdr;
1977  	bcopy(rb->vec->iov_base, p, tinfo->hdr_len);
1978  	rb->vec->iov_base = (u_char *)rb->vec->iov_base + tinfo->hdr_len;
1979  	rb->vec->iov_len -= tinfo->hdr_len;
1980  
1981  	/* Copy payload */
1982  	p = (u_char *)rb->xfer->recv.payload;
1983  	res = rb->xfer->recv.pay_len;
1984  
1985  	/* special handling for RRESQ */
1986  	if (pkt->mode.hdr.tcode == FWTCODE_RRESQ &&
1987  	    p != NULL && res >= sizeof(uint32_t)) {
1988  		*(uint32_t *)p = pkt->mode.rresq.data;
1989  		rb->xfer->recv.pay_len = sizeof(uint32_t);
1990  		return;
1991  	}
1992  
1993  	if ((tinfo->flag & FWTI_BLOCK_ASY) == 0)
1994  		return;
1995  
1996  	plen = pkt->mode.rresb.len;
1997  
1998  	for (i = 0; i < rb->nvec; i++, rb->vec++) {
1999  		len = MIN(rb->vec->iov_len, plen);
2000  		if (res < len) {
2001  			device_printf(rb->fc->bdev, "%s:"
2002  				" rcv buffer(%d) is %d bytes short.\n",
2003  				__func__, rb->xfer->recv.pay_len, len - res);
2004  			len = res;
2005  		}
2006  		bcopy(rb->vec->iov_base, p, len);
2007  		p += len;
2008  		res -= len;
2009  		plen -= len;
2010  		if (res == 0 || plen == 0)
2011  			break;
2012  	}
2013  	rb->xfer->recv.pay_len -= res;
2014  
2015  }
2016  
2017  /*
2018   * Generic packet receiving process.
2019   */
2020  void
2021  fw_rcv(struct fw_rcv_buf *rb)
2022  {
2023  	struct fw_pkt *fp, *resfp;
2024  	struct fw_bind *bind;
2025  	int tcode;
2026  	int i, len, oldstate;
2027  #if 0
2028  	{
2029  		uint32_t *qld;
2030  		int i;
2031  		qld = (uint32_t *)buf;
2032  		printf("spd %d len:%d\n", spd, len);
2033  		for( i = 0 ; i <= len && i < 32; i+= 4){
2034  			printf("0x%08x ", ntohl(qld[i/4]));
2035  			if((i % 16) == 15) printf("\n");
2036  		}
2037  		if((i % 16) != 15) printf("\n");
2038  	}
2039  #endif
2040  	fp = (struct fw_pkt *)rb->vec[0].iov_base;
2041  	tcode = fp->mode.common.tcode;
2042  	switch (tcode) {
2043  	case FWTCODE_WRES:
2044  	case FWTCODE_RRESQ:
2045  	case FWTCODE_RRESB:
2046  	case FWTCODE_LRES:
2047  		rb->xfer = fw_tl2xfer(rb->fc, fp->mode.hdr.src,
2048  				fp->mode.hdr.tlrt >> 2, fp->mode.hdr.tcode);
2049  		if(rb->xfer == NULL) {
2050  			device_printf(rb->fc->bdev, "%s: "
2051  				"unknown response "
2052  			    	"%s(%x) src=0x%x tl=0x%x rt=%d data=0x%x\n",
2053  				__func__,
2054  			    	tcode_str[tcode], tcode,
2055  				fp->mode.hdr.src,
2056  				fp->mode.hdr.tlrt >> 2,
2057  				fp->mode.hdr.tlrt & 3,
2058  				fp->mode.rresq.data);
2059  #if 0
2060  			printf("try ad-hoc work around!!\n");
2061  			rb->xfer = fw_tl2xfer(rb->fc, fp->mode.hdr.src,
2062  					(fp->mode.hdr.tlrt >> 2)^3);
2063  			if (rb->xfer == NULL) {
2064  				printf("no use...\n");
2065  				return;
2066  			}
2067  #else
2068  			return;
2069  #endif
2070  		}
2071  		fw_rcv_copy(rb);
2072  		if (rb->xfer->recv.hdr.mode.wres.rtcode != RESP_CMP)
2073  			rb->xfer->resp = EIO;
2074  		else
2075  			rb->xfer->resp = 0;
2076  		/* make sure the packet is drained in AT queue */
2077  		oldstate = rb->xfer->flag;
2078  		rb->xfer->flag = FWXF_RCVD;
2079  		switch (oldstate) {
2080  		case FWXF_SENT:
2081  			fw_xfer_done(rb->xfer);
2082  			break;
2083  		case FWXF_START:
2084  #if 0
2085  			if (firewire_debug)
2086  				printf("not sent yet tl=%x\n", rb->xfer->tl);
2087  #endif
2088  			break;
2089  		default:
2090  			device_printf(rb->fc->bdev, "%s: "
2091  				"unexpected flag 0x%02x\n", __func__, rb->xfer->flag);
2092  
2093  		}
2094  		return;
2095  	case FWTCODE_WREQQ:
2096  	case FWTCODE_WREQB:
2097  	case FWTCODE_RREQQ:
2098  	case FWTCODE_RREQB:
2099  	case FWTCODE_LREQ:
2100  		bind = fw_bindlookup(rb->fc, fp->mode.rreqq.dest_hi,
2101  			fp->mode.rreqq.dest_lo);
2102  		if(bind == NULL){
2103  			device_printf(rb->fc->bdev, "%s: "
2104  				"Unknown service addr 0x%04x:0x%08x %s(%x)"
2105  			    " src=0x%x data=%lx\n",
2106  				__func__,
2107  				fp->mode.wreqq.dest_hi,
2108  				fp->mode.wreqq.dest_lo,
2109  				tcode_str[tcode], tcode,
2110  				fp->mode.hdr.src,
2111  				ntohl(fp->mode.wreqq.data));
2112  
2113  			if (rb->fc->status == FWBUSINIT) {
2114  				device_printf(rb->fc->bdev, "%s: "
2115  					"cannot respond(bus reset)!\n",
2116  					__func__);
2117  				return;
2118  			}
2119  			rb->xfer = fw_xfer_alloc();
2120  			if(rb->xfer == NULL){
2121  				return;
2122  			}
2123  			rb->xfer->send.spd = rb->spd;
2124  			rb->xfer->send.pay_len = 0;
2125  			resfp = &rb->xfer->send.hdr;
2126  			switch (tcode) {
2127  			case FWTCODE_WREQQ:
2128  			case FWTCODE_WREQB:
2129  				resfp->mode.hdr.tcode = FWTCODE_WRES;
2130  				break;
2131  			case FWTCODE_RREQQ:
2132  				resfp->mode.hdr.tcode = FWTCODE_RRESQ;
2133  				break;
2134  			case FWTCODE_RREQB:
2135  				resfp->mode.hdr.tcode = FWTCODE_RRESB;
2136  				break;
2137  			case FWTCODE_LREQ:
2138  				resfp->mode.hdr.tcode = FWTCODE_LRES;
2139  				break;
2140  			}
2141  			resfp->mode.hdr.dst = fp->mode.hdr.src;
2142  			resfp->mode.hdr.tlrt = fp->mode.hdr.tlrt;
2143  			resfp->mode.hdr.pri = fp->mode.hdr.pri;
2144  			resfp->mode.rresb.rtcode = RESP_ADDRESS_ERROR;
2145  			resfp->mode.rresb.extcode = 0;
2146  			resfp->mode.rresb.len = 0;
2147  /*
2148  			rb->xfer->hand = fw_xferwake;
2149  */
2150  			rb->xfer->hand = fw_xfer_free;
2151  			if(fw_asyreq(rb->fc, -1, rb->xfer)){
2152  				fw_xfer_free(rb->xfer);
2153  				return;
2154  			}
2155  			return;
2156  		}
2157  		len = 0;
2158  		for (i = 0; (uint)i < rb->nvec; i ++)
2159  			len += rb->vec[i].iov_len;
2160  		rb->xfer = STAILQ_FIRST(&bind->xferlist);
2161  		if (rb->xfer == NULL) {
2162  			device_printf(rb->fc->bdev, "%s: "
2163  				"Discard a packet for this bind.\n",
2164  				__func__);
2165  			return;
2166  		}
2167  		STAILQ_REMOVE_HEAD(&bind->xferlist, link);
2168  		fw_rcv_copy(rb);
2169  		rb->xfer->hand(rb->xfer);
2170  		return;
2171  #if 0 /* shouldn't happen ?? or for GASP */
2172  	case FWTCODE_STREAM:
2173  	{
2174  		struct fw_xferq *xferq;
2175  
2176  		xferq = rb->fc->ir[sub];
2177  #if 0
2178  		printf("stream rcv dma %d len %d off %d spd %d\n",
2179  			sub, len, off, spd);
2180  #endif
2181  		if(xferq->queued >= xferq->maxq) {
2182  			printf("receive queue is full\n");
2183  			return;
2184  		}
2185  		/* XXX get xfer from xfer queue, we don't need copy for
2186  			per packet mode */
2187  		rb->xfer = fw_xfer_alloc_buf(M_FWXFER, 0, /* XXX */
2188  						vec[0].iov_len);
2189  		if (rb->xfer == NULL)
2190  			return;
2191  		fw_rcv_copy(rb)
2192  		s = splfw();
2193  		xferq->queued++;
2194  		STAILQ_INSERT_TAIL(&xferq->q, rb->xfer, link);
2195  		splx(s);
2196  		sc = device_get_softc(rb->fc->bdev);
2197  #if defined(__DragonFly__) || __FreeBSD_version < 500000
2198  		if (&xferq->rsel.si_pid != 0)
2199  #else
2200  		if (SEL_WAITING(&xferq->rsel))
2201  #endif
2202  			selwakeuppri(&xferq->rsel, FWPRI);
2203  		if (xferq->flag & FWXFERQ_WAKEUP) {
2204  			xferq->flag &= ~FWXFERQ_WAKEUP;
2205  			wakeup((caddr_t)xferq);
2206  		}
2207  		if (xferq->flag & FWXFERQ_HANDLER) {
2208  			xferq->hand(xferq);
2209  		}
2210  		return;
2211  		break;
2212  	}
2213  #endif
2214  	default:
2215  		device_printf(rb->fc->bdev,"%s: unknown tcode %d\n",
2216  				__func__, tcode);
2217  		break;
2218  	}
2219  }
2220  
2221  /*
2222   * Post process for Bus Manager election process.
2223   */
2224  static void
2225  fw_try_bmr_callback(struct fw_xfer *xfer)
2226  {
2227  	struct firewire_comm *fc;
2228  	int bmr;
2229  
2230  	if (xfer == NULL)
2231  		return;
2232  	fc = xfer->fc;
2233  	if (xfer->resp != 0)
2234  		goto error;
2235  	if (xfer->recv.payload == NULL)
2236  		goto error;
2237  	if (xfer->recv.hdr.mode.lres.rtcode != FWRCODE_COMPLETE)
2238  		goto error;
2239  
2240  	bmr = ntohl(xfer->recv.payload[0]);
2241  	if (bmr == 0x3f)
2242  		bmr = fc->nodeid;
2243  
2244  	CSRARC(fc, BUS_MGR_ID) = fc->set_bmr(fc, bmr & 0x3f);
2245  	fw_xfer_free_buf(xfer);
2246  	fw_bmr(fc);
2247  	return;
2248  
2249  error:
2250  	device_printf(fc->bdev, "bus manager election failed\n");
2251  	fw_xfer_free_buf(xfer);
2252  }
2253  
2254  
2255  /*
2256   * To candidate Bus Manager election process.
2257   */
2258  static void
2259  fw_try_bmr(void *arg)
2260  {
2261  	struct fw_xfer *xfer;
2262  	struct firewire_comm *fc = (struct firewire_comm *)arg;
2263  	struct fw_pkt *fp;
2264  	int err = 0;
2265  
2266  	xfer = fw_xfer_alloc_buf(8, 4);
2267  	if(xfer == NULL){
2268  		return;
2269  	}
2270  	xfer->send.spd = 0;
2271  	fc->status = FWBUSMGRELECT;
2272  
2273  	fp = &xfer->send.hdr;
2274  	fp->mode.lreq.dest_hi = 0xffff;
2275  	fp->mode.lreq.tlrt = 0;
2276  	fp->mode.lreq.tcode = FWTCODE_LREQ;
2277  	fp->mode.lreq.pri = 0;
2278  	fp->mode.lreq.src = 0;
2279  	fp->mode.lreq.len = 8;
2280  	fp->mode.lreq.extcode = EXTCODE_CMP_SWAP;
2281  	fp->mode.lreq.dst = FWLOCALBUS | fc->irm;
2282  	fp->mode.lreq.dest_lo = 0xf0000000 | BUS_MGR_ID;
2283  	xfer->send.payload[0] = htonl(0x3f);
2284  	xfer->send.payload[1] = htonl(fc->nodeid);
2285  	xfer->hand = fw_try_bmr_callback;
2286  
2287  	err = fw_asyreq(fc, -1, xfer);
2288  	if(err){
2289  		fw_xfer_free_buf(xfer);
2290  		return;
2291  	}
2292  	return;
2293  }
2294  
2295  #ifdef FW_VMACCESS
2296  /*
2297   * Software implementation for physical memory block access.
2298   * XXX:Too slow, usef for debug purpose only.
2299   */
2300  static void
2301  fw_vmaccess(struct fw_xfer *xfer){
2302  	struct fw_pkt *rfp, *sfp = NULL;
2303  	uint32_t *ld = (uint32_t *)xfer->recv.buf;
2304  
2305  	printf("vmaccess spd:%2x len:%03x data:%08x %08x %08x %08x\n",
2306  			xfer->spd, xfer->recv.len, ntohl(ld[0]), ntohl(ld[1]), ntohl(ld[2]), ntohl(ld[3]));
2307  	printf("vmaccess          data:%08x %08x %08x %08x\n", ntohl(ld[4]), ntohl(ld[5]), ntohl(ld[6]), ntohl(ld[7]));
2308  	if(xfer->resp != 0){
2309  		fw_xfer_free( xfer);
2310  		return;
2311  	}
2312  	if(xfer->recv.buf == NULL){
2313  		fw_xfer_free( xfer);
2314  		return;
2315  	}
2316  	rfp = (struct fw_pkt *)xfer->recv.buf;
2317  	switch(rfp->mode.hdr.tcode){
2318  		/* XXX need fix for 64bit arch */
2319  		case FWTCODE_WREQB:
2320  			xfer->send.buf = malloc(12, M_FW, M_NOWAIT);
2321  			xfer->send.len = 12;
2322  			sfp = (struct fw_pkt *)xfer->send.buf;
2323  			bcopy(rfp->mode.wreqb.payload,
2324  				(caddr_t)ntohl(rfp->mode.wreqb.dest_lo), ntohs(rfp->mode.wreqb.len));
2325  			sfp->mode.wres.tcode = FWTCODE_WRES;
2326  			sfp->mode.wres.rtcode = 0;
2327  			break;
2328  		case FWTCODE_WREQQ:
2329  			xfer->send.buf = malloc(12, M_FW, M_NOWAIT);
2330  			xfer->send.len = 12;
2331  			sfp->mode.wres.tcode = FWTCODE_WRES;
2332  			*((uint32_t *)(ntohl(rfp->mode.wreqb.dest_lo))) = rfp->mode.wreqq.data;
2333  			sfp->mode.wres.rtcode = 0;
2334  			break;
2335  		case FWTCODE_RREQB:
2336  			xfer->send.buf = malloc(16 + rfp->mode.rreqb.len, M_FW, M_NOWAIT);
2337  			xfer->send.len = 16 + ntohs(rfp->mode.rreqb.len);
2338  			sfp = (struct fw_pkt *)xfer->send.buf;
2339  			bcopy((caddr_t)ntohl(rfp->mode.rreqb.dest_lo),
2340  				sfp->mode.rresb.payload, (uint16_t)ntohs(rfp->mode.rreqb.len));
2341  			sfp->mode.rresb.tcode = FWTCODE_RRESB;
2342  			sfp->mode.rresb.len = rfp->mode.rreqb.len;
2343  			sfp->mode.rresb.rtcode = 0;
2344  			sfp->mode.rresb.extcode = 0;
2345  			break;
2346  		case FWTCODE_RREQQ:
2347  			xfer->send.buf = malloc(16, M_FW, M_NOWAIT);
2348  			xfer->send.len = 16;
2349  			sfp = (struct fw_pkt *)xfer->send.buf;
2350  			sfp->mode.rresq.data = *(uint32_t *)(ntohl(rfp->mode.rreqq.dest_lo));
2351  			sfp->mode.wres.tcode = FWTCODE_RRESQ;
2352  			sfp->mode.rresb.rtcode = 0;
2353  			break;
2354  		default:
2355  			fw_xfer_free( xfer);
2356  			return;
2357  	}
2358  	sfp->mode.hdr.dst = rfp->mode.hdr.src;
2359  	xfer->dst = ntohs(rfp->mode.hdr.src);
2360  	xfer->hand = fw_xfer_free;
2361  
2362  	sfp->mode.hdr.tlrt = rfp->mode.hdr.tlrt;
2363  	sfp->mode.hdr.pri = 0;
2364  
2365  	fw_asyreq(xfer->fc, -1, xfer);
2366  /**/
2367  	return;
2368  }
2369  #endif
2370  
2371  /*
2372   * CRC16 check-sum for IEEE1394 register blocks.
2373   */
2374  uint16_t
2375  fw_crc16(uint32_t *ptr, uint32_t len){
2376  	uint32_t i, sum, crc = 0;
2377  	int shift;
2378  	len = (len + 3) & ~3;
2379  	for(i = 0 ; i < len ; i+= 4){
2380  		for( shift = 28 ; shift >= 0 ; shift -= 4){
2381  			sum = ((crc >> 12) ^ (ptr[i/4] >> shift)) & 0xf;
2382  			crc = (crc << 4) ^ ( sum << 12 ) ^ ( sum << 5) ^ sum;
2383  		}
2384  		crc &= 0xffff;
2385  	}
2386  	return((uint16_t) crc);
2387  }
2388  
2389  /*
2390   * Find the root node, if it is not
2391   * Cycle Master Capable, then we should
2392   * override this and become the Cycle
2393   * Master
2394   */
2395  static int
2396  fw_bmr(struct firewire_comm *fc)
2397  {
2398  	struct fw_device fwdev;
2399  	union fw_self_id *self_id;
2400  	int cmstr;
2401  	uint32_t quad;
2402  
2403  	/* Check to see if the current root node is cycle master capable */
2404  	self_id = fw_find_self_id(fc, fc->max_node);
2405  	if (fc->max_node > 0) {
2406  		/* XXX check cmc bit of businfo block rather than contender */
2407  		if (self_id->p0.link_active && self_id->p0.contender)
2408  			cmstr = fc->max_node;
2409  		else {
2410  			device_printf(fc->bdev,
2411  				"root node is not cycle master capable\n");
2412  			/* XXX shall we be the cycle master? */
2413  			cmstr = fc->nodeid;
2414  			/* XXX need bus reset */
2415  		}
2416  	} else
2417  		cmstr = -1;
2418  
2419  		device_printf(fc->bdev, "bus manager %d %s\n",
2420  			CSRARC(fc, BUS_MGR_ID),
2421  			(CSRARC(fc, BUS_MGR_ID) != fc->nodeid) ? "(me)" : "");
2422  	if(CSRARC(fc, BUS_MGR_ID) != fc->nodeid) {
2423  		/* We are not the bus manager */
2424  		return(0);
2425  	}
2426  
2427  	/* Optimize gapcount */
2428  	if(fc->max_hop <= MAX_GAPHOP )
2429  		fw_phy_config(fc, cmstr, gap_cnt[fc->max_hop]);
2430  	/* If we are the cycle master, nothing to do */
2431  	if (cmstr == fc->nodeid || cmstr == -1)
2432  		return 0;
2433  	/* Bus probe has not finished, make dummy fwdev for cmstr */
2434  	bzero(&fwdev, sizeof(fwdev));
2435  	fwdev.fc = fc;
2436  	fwdev.dst = cmstr;
2437  	fwdev.speed = 0;
2438  	fwdev.maxrec = 8; /* 512 */
2439  	fwdev.status = FWDEVINIT;
2440  	/* Set cmstr bit on the cycle master */
2441  	quad = htonl(1 << 8);
2442  	fwmem_write_quad(&fwdev, NULL, 0/*spd*/,
2443  		0xffff, 0xf0000000 | STATE_SET, &quad, fw_asy_callback_free);
2444  
2445  	return 0;
2446  }
2447  
2448  int
2449  fw_open_isodma(struct firewire_comm *fc, int tx)
2450  {
2451  	struct fw_xferq **xferqa;
2452  	struct fw_xferq *xferq;
2453  	int i;
2454  
2455  	if (tx)
2456  		xferqa = &fc->it[0];
2457  	else
2458  		xferqa = &fc->ir[0];
2459  
2460  	FW_GLOCK(fc);
2461  	for (i = 0; i < fc->nisodma; i ++) {
2462  		xferq = xferqa[i];
2463  		if ((xferq->flag & FWXFERQ_OPEN) == 0) {
2464  			xferq->flag |= FWXFERQ_OPEN;
2465  			break;
2466  		}
2467  	}
2468  	if (i == fc->nisodma) {
2469  		printf("no free dma channel (tx=%d)\n", tx);
2470  		i = -1;
2471  	}
2472  	FW_GUNLOCK(fc);
2473  	return (i);
2474  }
2475