if_cx.c revision 171613
1/*-
2 * Cronyx-Sigma adapter driver for FreeBSD.
3 * Supports PPP/HDLC and Cisco/HDLC protocol in synchronous mode,
4 * and asyncronous channels with full modem control.
5 * Keepalive protocol implemented in both Cisco and PPP modes.
6 *
7 * Copyright (C) 1994-2002 Cronyx Engineering.
8 * Author: Serge Vakulenko, <vak@cronyx.ru>
9 *
10 * Copyright (C) 1999-2004 Cronyx Engineering.
11 * Rewritten on DDK, ported to NETGRAPH, rewritten for FreeBSD 3.x-5.x by
12 * Kurakin Roman, <rik@cronyx.ru>
13 *
14 * This software is distributed with NO WARRANTIES, not even the implied
15 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16 *
17 * Authors grant any other persons or organisations a permission to use,
18 * modify and redistribute this software in source and binary forms,
19 * as long as this message is kept with the software, all derivative
20 * works or modified versions.
21 *
22 * Cronyx Id: if_cx.c,v 1.1.2.34 2004/06/23 17:09:13 rik Exp $
23 */
24
25#include <sys/cdefs.h>
26__FBSDID("$FreeBSD: head/sys/dev/cx/if_cx.c 171613 2007-07-27 11:59:57Z rwatson $");
27
28#include <sys/param.h>
29
30#include <sys/systm.h>
31#include <sys/kernel.h>
32#include <sys/module.h>
33#include <sys/priv.h>
34#include <sys/proc.h>
35#include <sys/mbuf.h>
36#include <sys/sockio.h>
37#include <sys/malloc.h>
38#include <sys/socket.h>
39#include <sys/sysctl.h>
40#include <sys/conf.h>
41#include <sys/errno.h>
42#include <sys/serial.h>
43#include <sys/tty.h>
44#include <sys/bus.h>
45#include <machine/bus.h>
46#include <sys/rman.h>
47#include <isa/isavar.h>
48#include <sys/fcntl.h>
49#include <sys/interrupt.h>
50#include <vm/vm.h>
51#include <vm/pmap.h>
52#include <net/if.h>
53#include <machine/cpufunc.h>
54#include <machine/cserial.h>
55#include <machine/resource.h>
56#include <dev/cx/machdep.h>
57#include <dev/cx/cxddk.h>
58#include <dev/cx/cronyxfw.h>
59#include "opt_ng_cronyx.h"
60#ifdef NETGRAPH_CRONYX
61#   include "opt_netgraph.h"
62#   include <netgraph/ng_message.h>
63#   include <netgraph/netgraph.h>
64#   include <dev/cx/ng_cx.h>
65#else
66#   include <net/if_types.h>
67#   include <net/if_sppp.h>
68#   define PP_CISCO IFF_LINK2
69#   include <net/bpf.h>
70#endif
71
72#define NCX	1
73
74/* If we don't have Cronyx's sppp version, we don't have fr support via sppp */
75#ifndef PP_FR
76#define PP_FR 0
77#endif
78
79#define CX_DEBUG(d,s)	({if (d->chan->debug) {\
80				printf ("%s: ", d->name); printf s;}})
81#define CX_DEBUG2(d,s)	({if (d->chan->debug>1) {\
82				printf ("%s: ", d->name); printf s;}})
83
84#define CX_LOCK_NAME	"cxX"
85
86static	int	cx_mpsafenet = 1;
87TUNABLE_INT("debug.cx.mpsafenet", &cx_mpsafenet);
88SYSCTL_NODE(_debug, OID_AUTO, cx, CTLFLAG_RD, 0, "Cronyx Sigma Adapters");
89SYSCTL_INT(_debug_cx, OID_AUTO, mpsafenet, CTLFLAG_RD, &cx_mpsafenet, 0,
90	"Enable/disable MPSAFE network support for Cronyx Sigma Adapters");
91
92#define CX_LOCK(_bd)		do { \
93				    if (cx_mpsafenet) \
94					mtx_lock (&(_bd)->cx_mtx); \
95				} while (0)
96#define CX_UNLOCK(_bd)		do { \
97				    if (cx_mpsafenet) \
98					mtx_unlock (&(_bd)->cx_mtx); \
99				} while (0)
100#define CX_LOCK_ASSERT(_bd)	do { \
101				    if (cx_mpsafenet) \
102					mtx_assert (&(_bd)->cx_mtx, MA_OWNED); \
103				} while (0)
104
105typedef struct _async_q {
106	int beg;
107	int end;
108	#define BF_SZ 14400
109	int buf[BF_SZ+1];
110} async_q;
111
112#define AQ_GSZ(q)	((BF_SZ + (q)->end - (q)->beg)%BF_SZ)
113#define AQ_PUSH(q,c)	{*((q)->buf + (q)->end) = c;\
114			(q)->end = ((q)->end + 1)%BF_SZ;}
115#define AQ_POP(q,c)	{c = *((q)->buf + (q)->beg);\
116			(q)->beg = ((q)->beg + 1)%BF_SZ;}
117
118static void cx_identify		__P((driver_t *, device_t));
119static int cx_probe		__P((device_t));
120static int cx_attach		__P((device_t));
121static int cx_detach		__P((device_t));
122static t_open_t			cx_topen;
123static t_modem_t		cx_tmodem;
124static t_close_t		cx_tclose;
125
126static device_method_t cx_isa_methods [] = {
127	DEVMETHOD(device_identify,	cx_identify),
128	DEVMETHOD(device_probe,		cx_probe),
129	DEVMETHOD(device_attach,	cx_attach),
130	DEVMETHOD(device_detach,	cx_detach),
131	{0, 0}
132};
133
134typedef struct _cx_dma_mem_t {
135	unsigned long	phys;
136	void		*virt;
137	size_t		size;
138	bus_dma_tag_t	dmat;
139	bus_dmamap_t	mapp;
140} cx_dma_mem_t;
141
142typedef struct _drv_t {
143	char name [8];
144	cx_chan_t *chan;
145	cx_board_t *board;
146	cx_dma_mem_t dmamem;
147	struct tty *tty;
148	struct callout dcd_timeout_handle;
149	unsigned callout;
150	unsigned lock;
151	int open_dev;
152	int cd;
153	int running;
154#ifdef NETGRAPH
155	char	nodename [NG_NODELEN+1];
156	hook_p	hook;
157	hook_p	debug_hook;
158	node_p	node;
159	struct	ifqueue lo_queue;
160	struct	ifqueue hi_queue;
161	short	timeout;
162	struct	callout timeout_handle;
163#else
164	struct	ifqueue queue;
165	struct	ifnet *ifp;
166#endif
167	struct	cdev *devt;
168	async_q	aqueue;
169#define CX_READ 1
170#define CX_WRITE 2
171	int intr_action;
172	short atimeout;
173} drv_t;
174
175typedef struct _bdrv_t {
176	cx_board_t	*board;
177	struct resource	*base_res;
178	struct resource	*drq_res;
179	struct resource	*irq_res;
180	int		base_rid;
181	int		drq_rid;
182	int		irq_rid;
183	void		*intrhand;
184	drv_t		channel [NCHAN];
185	struct mtx	cx_mtx;
186} bdrv_t;
187
188static driver_t cx_isa_driver = {
189	"cx",
190	cx_isa_methods,
191	sizeof (bdrv_t),
192};
193
194static devclass_t cx_devclass;
195
196extern long csigma_fw_len;
197extern const char *csigma_fw_version;
198extern const char *csigma_fw_date;
199extern const char *csigma_fw_copyright;
200extern const cr_dat_tst_t csigma_fw_tvec[];
201extern const u_char csigma_fw_data[];
202static void cx_oproc (struct tty *tp);
203static int cx_param (struct tty *tp, struct termios *t);
204static void cx_stop (struct tty *tp, int flag);
205static void cx_receive (cx_chan_t *c, char *data, int len);
206static void cx_transmit (cx_chan_t *c, void *attachment, int len);
207static void cx_error (cx_chan_t *c, int data);
208static void cx_modem (cx_chan_t *c);
209static void cx_up (drv_t *d);
210static void cx_start (drv_t *d);
211static void cx_softintr (void *);
212static void *cx_fast_ih;
213static void cx_down (drv_t *d);
214static void cx_watchdog (drv_t *d);
215static void cx_carrier (void *arg);
216
217#ifdef NETGRAPH
218extern struct ng_type typestruct;
219#else
220static void cx_ifstart (struct ifnet *ifp);
221static void cx_tlf (struct sppp *sp);
222static void cx_tls (struct sppp *sp);
223static void cx_ifwatchdog (struct ifnet *ifp);
224static int cx_sioctl (struct ifnet *ifp, u_long cmd, caddr_t data);
225static void cx_initialize (void *softc);
226#endif
227
228static cx_board_t *adapter [NCX];
229static drv_t *channel [NCX*NCHAN];
230static struct callout led_timo [NCX];
231static struct callout timeout_handle;
232
233static int cx_open (struct cdev *dev, int flag, int mode, struct thread *td);
234static int cx_close (struct cdev *dev, int flag, int mode, struct thread *td);
235static int cx_ioctl (struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td);
236static struct cdevsw cx_cdevsw = {
237	.d_version  = D_VERSION,
238	.d_open     = cx_open,
239	.d_close    = cx_close,
240	.d_ioctl    = cx_ioctl,
241	.d_name     = "cx",
242	.d_flags    = D_TTY | D_NEEDGIANT,
243};
244
245static int MY_SOFT_INTR;
246
247/*
248 * Print the mbuf chain, for debug purposes only.
249 */
250static void printmbuf (struct mbuf *m)
251{
252	printf ("mbuf:");
253	for (; m; m=m->m_next) {
254		if (m->m_flags & M_PKTHDR)
255			printf (" HDR %d:", m->m_pkthdr.len);
256		if (m->m_flags & M_EXT)
257			printf (" EXT:");
258		printf (" %d", m->m_len);
259	}
260	printf ("\n");
261}
262
263/*
264 * Make an mbuf from data.
265 */
266static struct mbuf *makembuf (void *buf, u_int len)
267{
268	struct mbuf *m, *o, *p;
269
270	MGETHDR (m, M_DONTWAIT, MT_DATA);
271
272	if (! m)
273		return 0;
274
275	if (len >= MINCLSIZE)
276		MCLGET (m, M_DONTWAIT);
277
278	m->m_pkthdr.len = len;
279	m->m_len = 0;
280
281	p = m;
282	while (len) {
283		u_int n = M_TRAILINGSPACE (p);
284		if (n > len)
285			n = len;
286		if (! n) {
287			/* Allocate new mbuf. */
288			o = p;
289			MGET (p, M_DONTWAIT, MT_DATA);
290			if (! p) {
291				m_freem (m);
292				return 0;
293			}
294			if (len >= MINCLSIZE)
295				MCLGET (p, M_DONTWAIT);
296			p->m_len = 0;
297			o->m_next = p;
298
299			n = M_TRAILINGSPACE (p);
300			if (n > len)
301				n = len;
302		}
303		bcopy (buf, mtod (p, caddr_t) + p->m_len, n);
304
305		p->m_len += n;
306		buf = n + (char*) buf;
307		len -= n;
308	}
309	return m;
310}
311
312/*
313 * Recover after lost transmit interrupts.
314 */
315static void cx_timeout (void *arg)
316{
317	drv_t *d;
318	int s, i, k;
319
320	for (i = 0; i < NCX; i++) {
321		if (adapter[i] == NULL)
322			continue;
323		for (k = 0; k < NCHAN; ++k) {
324			d = channel[i * NCHAN + k];
325			if (! d)
326				continue;
327			s = splhigh ();
328			CX_LOCK ((bdrv_t *)d->board->sys);
329			if (d->atimeout == 1 && d->tty && d->tty->t_state & TS_BUSY) {
330				d->tty->t_state &= ~TS_BUSY;
331				if (d->tty->t_dev) {
332					d->intr_action |= CX_WRITE;
333					MY_SOFT_INTR = 1;
334					swi_sched (cx_fast_ih, 0);
335				}
336				CX_DEBUG (d, ("cx_timeout\n"));
337			}
338			if (d->atimeout)
339				d->atimeout--;
340			CX_UNLOCK ((bdrv_t *)d->board->sys);
341			splx (s);
342		}
343	}
344	callout_reset (&timeout_handle, hz*5, cx_timeout, 0);
345}
346
347static void cx_led_off (void *arg)
348{
349	cx_board_t *b = arg;
350	bdrv_t *bd = b->sys;
351	int s;
352
353	s = splhigh ();
354	CX_LOCK (bd);
355	cx_led (b, 0);
356	CX_UNLOCK (bd);
357	splx (s);
358}
359
360/*
361 * Activate interupt handler from DDK.
362 */
363static void cx_intr (void *arg)
364{
365	bdrv_t *bd = arg;
366	cx_board_t *b = bd->board;
367#ifndef NETGRAPH
368	int i;
369#endif
370	int s = splhigh ();
371
372	CX_LOCK (bd);
373	/* Turn LED on. */
374	cx_led (b, 1);
375
376	cx_int_handler (b);
377
378	/* Turn LED off 50 msec later. */
379	callout_reset (&led_timo[b->num], hz/20, cx_led_off, b);
380	CX_UNLOCK (bd);
381	splx (s);
382
383#ifndef NETGRAPH
384	/* Pass packets in a lock-free state */
385	for (i = 0; i < NCHAN && b->chan[i].type; i++) {
386		drv_t *d = b->chan[i].sys;
387		struct mbuf *m;
388		if (!d || !d->running)
389			continue;
390		while (_IF_QLEN(&d->queue)) {
391			IF_DEQUEUE (&d->queue,m);
392			if (!m)
393				continue;
394			sppp_input (d->ifp, m);
395		}
396	}
397#endif
398}
399
400static int probe_irq (cx_board_t *b, int irq)
401{
402	int mask, busy, cnt;
403
404	/* Clear pending irq, if any. */
405	cx_probe_irq (b, -irq);
406	DELAY (100);
407	for (cnt=0; cnt<5; ++cnt) {
408		/* Get the mask of pending irqs, assuming they are busy.
409		 * Activate the adapter on given irq. */
410		busy = cx_probe_irq (b, irq);
411		DELAY (100);
412
413		/* Get the mask of active irqs.
414		 * Deactivate our irq. */
415		mask = cx_probe_irq (b, -irq);
416		DELAY (100);
417		if ((mask & ~busy) == 1 << irq) {
418			cx_probe_irq (b, 0);
419			/* printf ("cx%d: irq %d ok, mask=0x%04x, busy=0x%04x\n",
420				b->num, irq, mask, busy); */
421			return 1;
422		}
423	}
424	/* printf ("cx%d: irq %d not functional, mask=0x%04x, busy=0x%04x\n",
425		b->num, irq, mask, busy); */
426	cx_probe_irq (b, 0);
427	return 0;
428}
429
430static short porttab [] = {
431	0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0,
432	0x300, 0x320, 0x340, 0x360, 0x380, 0x3a0, 0x3c0, 0x3e0, 0
433};
434static char dmatab [] = { 7, 6, 5, 0 };
435static char irqtab [] = { 5, 10, 11, 7, 3, 15, 12, 0 };
436
437static int cx_is_free_res (device_t dev, int rid, int type, u_long start,
438	u_long end, u_long count)
439{
440	struct resource *res;
441
442	if (!(res = bus_alloc_resource (dev, type, &rid, start, end, count,
443	    RF_ALLOCATED)))
444		return 0;
445
446	bus_release_resource (dev, type, rid, res);
447
448	return 1;
449}
450
451static void cx_identify (driver_t *driver, device_t dev)
452{
453	u_long iobase, rescount;
454	int devcount;
455	device_t *devices;
456	device_t child;
457	devclass_t my_devclass;
458	int i, k;
459
460	if ((my_devclass = devclass_find ("cx")) == NULL)
461		return;
462
463	devclass_get_devices (my_devclass, &devices, &devcount);
464
465	if (devcount == 0) {
466		/* We should find all devices by our self. We could alter other
467		 * devices, but we don't have a choise
468		 */
469		for (i = 0; (iobase = porttab [i]) != 0; i++) {
470			if (!cx_is_free_res (dev, 0, SYS_RES_IOPORT,
471			    iobase, iobase + NPORT, NPORT))
472				continue;
473			if (cx_probe_board (iobase, -1, -1) == 0)
474				continue;
475
476			devcount++;
477
478			child = BUS_ADD_CHILD (dev, ISA_ORDER_SPECULATIVE, "cx",
479			    -1);
480
481			if (child == NULL)
482				return;
483
484			device_set_desc_copy (child, "Cronyx Sigma");
485			device_set_driver (child, driver);
486			bus_set_resource (child, SYS_RES_IOPORT, 0,
487			    iobase, NPORT);
488
489			if (devcount >= NCX)
490				break;
491		}
492	} else {
493		static short porttab [] = {
494			0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0,
495			0x300, 0x320, 0x340, 0x360, 0x380, 0x3a0, 0x3c0, 0x3e0, 0
496		};
497		/* Lets check user choise.
498		 */
499		for (k = 0; k < devcount; k++) {
500			if (bus_get_resource (devices[k], SYS_RES_IOPORT, 0,
501			    &iobase, &rescount) != 0)
502				continue;
503
504			for (i = 0; porttab [i] != 0; i++) {
505				if (porttab [i] != iobase)
506					continue;
507				if (!cx_is_free_res (devices[k], 0, SYS_RES_IOPORT,
508				    iobase, iobase + NPORT, NPORT))
509					continue;
510				if (cx_probe_board (iobase, -1, -1) == 0)
511					continue;
512				porttab [i] = -1;
513				device_set_desc_copy (devices[k], "Cronyx Sigma");
514				break;
515			}
516
517			if (porttab [i] == 0) {
518				device_delete_child (
519				    device_get_parent (devices[k]),
520				    devices [k]);
521				devices[k] = 0;
522				continue;
523			}
524		}
525		for (k = 0; k < devcount; k++) {
526			if (devices[k] == 0)
527				continue;
528			if (bus_get_resource (devices[k], SYS_RES_IOPORT, 0,
529			    &iobase, &rescount) == 0)
530				continue;
531			for (i = 0; (iobase = porttab [i]) != 0; i++) {
532				if (porttab [i] == -1) {
533					continue;
534				}
535				if (!cx_is_free_res (devices[k], 0, SYS_RES_IOPORT,
536				    iobase, iobase + NPORT, NPORT))
537					continue;
538				if (cx_probe_board (iobase, -1, -1) == 0)
539					continue;
540
541				bus_set_resource (devices[k], SYS_RES_IOPORT, 0,
542				    iobase, NPORT);
543				porttab [i] = -1;
544				device_set_desc_copy (devices[k], "Cronyx Sigma");
545				break;
546			}
547			if (porttab [i] == 0) {
548				device_delete_child (
549				    device_get_parent (devices[k]),
550				    devices [k]);
551			}
552		}
553		free (devices, M_TEMP);
554	}
555
556	return;
557}
558
559static int cx_probe (device_t dev)
560{
561	int unit = device_get_unit (dev);
562	int i;
563	u_long iobase, rescount;
564
565	if (!device_get_desc (dev) ||
566	    strcmp (device_get_desc (dev), "Cronyx Sigma"))
567		return ENXIO;
568
569	if (bus_get_resource (dev, SYS_RES_IOPORT, 0, &iobase, &rescount) != 0) {
570		printf ("cx%d: Couldn't get IOPORT\n", unit);
571		return ENXIO;
572	}
573
574	if (!cx_is_free_res (dev, 0, SYS_RES_IOPORT,
575	    iobase, iobase + NPORT, NPORT)) {
576		printf ("cx%d: Resource IOPORT isn't free %lx\n", unit, iobase);
577		return ENXIO;
578	}
579
580	for (i = 0; porttab [i] != 0; i++) {
581		if (porttab [i] == iobase) {
582			porttab [i] = -1;
583			break;
584		}
585	}
586
587	if (porttab [i] == 0) {
588		return ENXIO;
589	}
590
591	if (!cx_probe_board (iobase, -1, -1)) {
592		printf ("cx%d: probing for Sigma at %lx faild\n", unit, iobase);
593		return ENXIO;
594	}
595
596	return 0;
597}
598
599static void
600cx_bus_dmamap_addr (void *arg, bus_dma_segment_t *segs, int nseg, int error)
601{
602	unsigned long *addr;
603
604	if (error)
605		return;
606
607	KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
608	addr = arg;
609	*addr = segs->ds_addr;
610}
611
612static int
613cx_bus_dma_mem_alloc (int bnum, int cnum, cx_dma_mem_t *dmem)
614{
615	int error;
616
617	error = bus_dma_tag_create (NULL, 16, 0, BUS_SPACE_MAXADDR_24BIT,
618		BUS_SPACE_MAXADDR, NULL, NULL, dmem->size, 1,
619		dmem->size, 0, NULL, NULL, &dmem->dmat);
620	if (error) {
621		if (cnum >= 0)	printf ("cx%d-%d: ", bnum, cnum);
622		else		printf ("cx%d: ", bnum);
623		printf ("couldn't allocate tag for dma memory\n");
624 		return 0;
625	}
626	error = bus_dmamem_alloc (dmem->dmat, (void **)&dmem->virt,
627		BUS_DMA_NOWAIT | BUS_DMA_ZERO, &dmem->mapp);
628	if (error) {
629		if (cnum >= 0)	printf ("cx%d-%d: ", bnum, cnum);
630		else		printf ("cx%d: ", bnum);
631		printf ("couldn't allocate mem for dma memory\n");
632		bus_dma_tag_destroy (dmem->dmat);
633 		return 0;
634	}
635	error = bus_dmamap_load (dmem->dmat, dmem->mapp, dmem->virt,
636		dmem->size, cx_bus_dmamap_addr, &dmem->phys, 0);
637	if (error) {
638		if (cnum >= 0)	printf ("cx%d-%d: ", bnum, cnum);
639		else		printf ("cx%d: ", bnum);
640		printf ("couldn't load mem map for dma memory\n");
641		bus_dmamem_free (dmem->dmat, dmem->virt, dmem->mapp);
642		bus_dma_tag_destroy (dmem->dmat);
643 		return 0;
644	}
645	return 1;
646}
647
648static void
649cx_bus_dma_mem_free (cx_dma_mem_t *dmem)
650{
651	bus_dmamap_unload (dmem->dmat, dmem->mapp);
652	bus_dmamem_free (dmem->dmat, dmem->virt, dmem->mapp);
653	bus_dma_tag_destroy (dmem->dmat);
654}
655
656/*
657 * The adapter is present, initialize the driver structures.
658 */
659static int cx_attach (device_t dev)
660{
661	bdrv_t *bd = device_get_softc (dev);
662	u_long iobase, drq, irq, rescount;
663	int unit = device_get_unit (dev);
664	char *cx_ln = CX_LOCK_NAME;
665	cx_board_t *b;
666	cx_chan_t *c;
667	drv_t *d;
668	int i;
669	int s;
670
671	KASSERT ((bd != NULL), ("cx%d: NULL device softc\n", unit));
672
673	bus_get_resource (dev, SYS_RES_IOPORT, 0, &iobase, &rescount);
674	bd->base_rid = 0;
675	bd->base_res = bus_alloc_resource (dev, SYS_RES_IOPORT, &bd->base_rid,
676		iobase, iobase + NPORT, NPORT, RF_ACTIVE);
677	if (! bd->base_res) {
678		printf ("cx%d: cannot allocate base address\n", unit);
679		return ENXIO;
680	}
681
682	if (bus_get_resource (dev, SYS_RES_DRQ, 0, &drq, &rescount) != 0) {
683		for (i = 0; (drq = dmatab [i]) != 0; i++) {
684			if (!cx_is_free_res (dev, 0, SYS_RES_DRQ,
685			    drq, drq + 1, 1))
686				continue;
687			bus_set_resource (dev, SYS_RES_DRQ, 0, drq, 1);
688			break;
689		}
690
691		if (dmatab[i] == 0) {
692			bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
693				bd->base_res);
694			printf ("cx%d: Couldn't get DRQ\n", unit);
695			return ENXIO;
696		}
697	}
698
699	bd->drq_rid = 0;
700	bd->drq_res = bus_alloc_resource (dev, SYS_RES_DRQ, &bd->drq_rid,
701		drq, drq + 1, 1, RF_ACTIVE);
702	if (! bd->drq_res) {
703		printf ("cx%d: cannot allocate drq\n", unit);
704		bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
705			bd->base_res);
706		return ENXIO;
707	}
708
709	if (bus_get_resource (dev, SYS_RES_IRQ, 0, &irq, &rescount) != 0) {
710		for (i = 0; (irq = irqtab [i]) != 0; i++) {
711			if (!cx_is_free_res (dev, 0, SYS_RES_IRQ,
712			    irq, irq + 1, 1))
713				continue;
714			bus_set_resource (dev, SYS_RES_IRQ, 0, irq, 1);
715			break;
716		}
717
718		if (irqtab[i] == 0) {
719			bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid,
720				bd->drq_res);
721			bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
722				bd->base_res);
723			printf ("cx%d: Couldn't get IRQ\n", unit);
724			return ENXIO;
725		}
726	}
727
728	bd->irq_rid = 0;
729	bd->irq_res = bus_alloc_resource (dev, SYS_RES_IRQ, &bd->irq_rid,
730		irq, irq + 1, 1, RF_ACTIVE);
731	if (! bd->irq_res) {
732		printf ("cx%d: Couldn't allocate irq\n", unit);
733		bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid,
734			bd->drq_res);
735		bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
736			bd->base_res);
737		return ENXIO;
738	}
739
740	b = malloc (sizeof (cx_board_t), M_DEVBUF, M_WAITOK);
741	if (!b) {
742		printf ("cx:%d: Couldn't allocate memory\n", unit);
743		return (ENXIO);
744	}
745	adapter[unit] = b;
746	bzero (b, sizeof(cx_board_t));
747
748	if (! cx_open_board (b, unit, iobase, irq, drq)) {
749		printf ("cx%d: error loading firmware\n", unit);
750		free (b, M_DEVBUF);
751		bus_release_resource (dev, SYS_RES_IRQ, bd->irq_rid,
752			bd->irq_res);
753		bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid,
754			bd->drq_res);
755		bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
756			bd->base_res);
757 		return ENXIO;
758	}
759
760	bd->board = b;
761
762	cx_ln[2] = '0' + unit;
763	mtx_init (&bd->cx_mtx, cx_ln, MTX_NETWORK_LOCK, MTX_DEF|MTX_RECURSE);
764	if (! probe_irq (b, irq)) {
765		printf ("cx%d: irq %ld not functional\n", unit, irq);
766		bd->board = 0;
767		adapter [unit] = 0;
768		mtx_destroy (&bd->cx_mtx);
769		free (b, M_DEVBUF);
770		bus_release_resource (dev, SYS_RES_IRQ, bd->irq_rid,
771			bd->irq_res);
772		bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid,
773			bd->drq_res);
774		bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
775			bd->base_res);
776 		return ENXIO;
777	}
778	b->sys = bd;
779	callout_init (&led_timo[b->num], cx_mpsafenet ? CALLOUT_MPSAFE : 0);
780	s = splhigh ();
781	if (bus_setup_intr (dev, bd->irq_res,
782			   INTR_TYPE_NET|(cx_mpsafenet?INTR_MPSAFE:0),
783			   NULL, cx_intr, bd, &bd->intrhand)) {
784		printf ("cx%d: Can't setup irq %ld\n", unit, irq);
785		bd->board = 0;
786		b->sys = 0;
787		adapter [unit] = 0;
788		mtx_destroy (&bd->cx_mtx);
789		free (b, M_DEVBUF);
790		bus_release_resource (dev, SYS_RES_IRQ, bd->irq_rid,
791			bd->irq_res);
792		bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid,
793			bd->drq_res);
794		bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
795			bd->base_res);
796		splx (s);
797 		return ENXIO;
798	}
799
800	CX_LOCK (bd);
801	cx_init (b, b->num, b->port, irq, drq);
802	cx_setup_board (b, 0, 0, 0);
803	CX_UNLOCK (bd);
804
805	printf ("cx%d: <Cronyx-Sigma-%s>\n", b->num, b->name);
806
807	for (c=b->chan; c<b->chan+NCHAN; ++c) {
808		if (c->type == T_NONE)
809			continue;
810		d = &bd->channel[c->num];
811		d->dmamem.size = sizeof(cx_buf_t);
812		if (! cx_bus_dma_mem_alloc (unit, c->num, &d->dmamem))
813			continue;
814		d->board = b;
815		d->chan = c;
816		d->open_dev = 0;
817		c->sys = d;
818		channel [b->num*NCHAN + c->num] = d;
819		sprintf (d->name, "cx%d.%d", b->num, c->num);
820
821		switch (c->type) {
822		case T_SYNC_RS232:
823		case T_SYNC_V35:
824		case T_SYNC_RS449:
825		case T_UNIV:
826		case T_UNIV_RS232:
827		case T_UNIV_RS449:
828		case T_UNIV_V35:
829#ifdef NETGRAPH
830		if (ng_make_node_common (&typestruct, &d->node) != 0) {
831			printf ("%s: cannot make common node\n", d->name);
832			channel [b->num*NCHAN + c->num] = 0;
833			c->sys = 0;
834			cx_bus_dma_mem_free (&d->dmamem);
835			continue;
836		}
837		NG_NODE_SET_PRIVATE (d->node, d);
838		sprintf (d->nodename, "%s%d", NG_CX_NODE_TYPE,
839			 c->board->num*NCHAN + c->num);
840		if (ng_name_node (d->node, d->nodename)) {
841			printf ("%s: cannot name node\n", d->nodename);
842			NG_NODE_UNREF (d->node);
843			channel [b->num*NCHAN + c->num] = 0;
844			c->sys = 0;
845			cx_bus_dma_mem_free (&d->dmamem);
846			continue;
847		}
848		d->lo_queue.ifq_maxlen = IFQ_MAXLEN;
849		d->hi_queue.ifq_maxlen = IFQ_MAXLEN;
850		mtx_init (&d->lo_queue.ifq_mtx, "cx_queue_lo", NULL, MTX_DEF);
851		mtx_init (&d->hi_queue.ifq_mtx, "cx_queue_hi", NULL, MTX_DEF);
852		callout_init (&d->timeout_handle,
853			     cx_mpsafenet ? CALLOUT_MPSAFE : 0);
854#else /*NETGRAPH*/
855		d->ifp = if_alloc(IFT_PPP);
856		if (d->ifp == NULL) {
857			printf ("%s: cannot if_alloc() common interface\n",
858			    d->name);
859			channel [b->num*NCHAN + c->num] = 0;
860			c->sys = 0;
861			cx_bus_dma_mem_free (&d->dmamem);
862			continue;
863		}
864		d->ifp->if_softc	= d;
865		if_initname (d->ifp, "cx", b->num * NCHAN + c->num);
866		d->ifp->if_mtu		= PP_MTU;
867		d->ifp->if_flags	= IFF_POINTOPOINT | IFF_MULTICAST;
868		if (!cx_mpsafenet)
869			d->ifp->if_flags |= IFF_NEEDSGIANT;
870		d->ifp->if_ioctl	= cx_sioctl;
871		d->ifp->if_start	= cx_ifstart;
872		d->ifp->if_watchdog	= cx_ifwatchdog;
873		d->ifp->if_init		= cx_initialize;
874		d->queue.ifq_maxlen	= 2;
875		mtx_init (&d->queue.ifq_mtx, "cx_queue", NULL, MTX_DEF);
876		sppp_attach (d->ifp);
877		if_attach (d->ifp);
878		IFP2SP(d->ifp)->pp_tlf	= cx_tlf;
879		IFP2SP(d->ifp)->pp_tls	= cx_tls;
880		/* If BPF is in the kernel, call the attach for it.
881		 * Size of PPP header is 4 bytes. */
882		bpfattach (d->ifp, DLT_PPP, 4);
883#endif /*NETGRAPH*/
884		}
885		d->tty = ttyalloc ();
886		d->tty->t_open	= cx_topen;
887		d->tty->t_close	= cx_tclose;
888		d->tty->t_param	= cx_param;
889		d->tty->t_stop	= cx_stop;
890		d->tty->t_modem	= cx_tmodem;
891		d->tty->t_oproc	= cx_oproc;
892		d->tty->t_sc	= d;
893		CX_LOCK (bd);
894		cx_start_chan (c, d->dmamem.virt, d->dmamem.phys);
895		cx_register_receive (c, &cx_receive);
896		cx_register_transmit (c, &cx_transmit);
897		cx_register_error (c, &cx_error);
898		cx_register_modem (c, &cx_modem);
899		CX_UNLOCK (bd);
900
901		ttycreate(d->tty, TS_CALLOUT, "x%r%r", b->num, c->num);
902		d->devt = make_dev (&cx_cdevsw, b->num*NCHAN + c->num + 64, UID_ROOT, GID_WHEEL, 0600, "cx%d", b->num*NCHAN + c->num);
903		d->devt->si_drv1 = d;
904		callout_init (&d->dcd_timeout_handle,
905			     cx_mpsafenet ? CALLOUT_MPSAFE : 0);
906	}
907	splx (s);
908
909	return 0;
910}
911
912static int cx_detach (device_t dev)
913{
914	bdrv_t *bd = device_get_softc (dev);
915	cx_board_t *b = bd->board;
916	cx_chan_t *c;
917	int s;
918
919	KASSERT (mtx_initialized (&bd->cx_mtx), ("cx mutex not initialized"));
920
921	s = splhigh ();
922	CX_LOCK (bd);
923	/* Check if the device is busy (open). */
924	for (c = b->chan; c < b->chan + NCHAN; ++c) {
925		drv_t *d = (drv_t*) c->sys;
926
927		if (!d || d->chan->type == T_NONE)
928			continue;
929		if (d->lock) {
930			CX_UNLOCK (bd);
931			splx (s);
932			return EBUSY;
933		}
934		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN) &&
935		    (d->open_dev|0x2)) {
936			CX_UNLOCK (bd);
937			splx (s);
938			return EBUSY;
939		}
940		if (d->running) {
941			CX_UNLOCK (bd);
942			splx (s);
943			return EBUSY;
944		}
945	}
946
947	/* Deactivate the timeout routine. And soft interrupt*/
948	callout_stop (&led_timo[b->num]);
949
950	for (c = b->chan; c < b->chan + NCHAN; ++c) {
951		drv_t *d = c->sys;
952
953		if (!d || d->chan->type == T_NONE)
954			continue;
955
956		callout_stop (&d->dcd_timeout_handle);
957	}
958	CX_UNLOCK (bd);
959	bus_teardown_intr (dev, bd->irq_res, bd->intrhand);
960	bus_release_resource (dev, SYS_RES_IRQ, bd->irq_rid, bd->irq_res);
961
962	bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid, bd->drq_res);
963
964	bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid, bd->base_res);
965
966	CX_LOCK (bd);
967	cx_close_board (b);
968
969	/* Detach the interfaces, free buffer memory. */
970	for (c = b->chan; c < b->chan + NCHAN; ++c) {
971		drv_t *d = (drv_t*) c->sys;
972
973		if (!d || d->chan->type == T_NONE)
974			continue;
975
976		if (d->tty) {
977			ttyfree (d->tty);
978			d->tty = NULL;
979		}
980
981#ifdef NETGRAPH
982		if (d->node) {
983			ng_rmnode_self (d->node);
984			NG_NODE_UNREF (d->node);
985			d->node = NULL;
986		}
987		mtx_destroy (&d->lo_queue.ifq_mtx);
988		mtx_destroy (&d->hi_queue.ifq_mtx);
989#else
990		/* Detach from the packet filter list of interfaces. */
991		bpfdetach (d->ifp);
992		/* Detach from the sync PPP list. */
993		sppp_detach (d->ifp);
994
995		if_detach (d->ifp);
996		if_free(d->ifp);
997		/* XXXRIK: check interconnection with irq handler */
998		IF_DRAIN (&d->queue);
999		mtx_destroy (&d->queue.ifq_mtx);
1000#endif
1001		destroy_dev (d->devt);
1002	}
1003
1004	cx_led_off (b);
1005	CX_UNLOCK (bd);
1006	callout_drain (&led_timo[b->num]);
1007	for (c = b->chan; c < b->chan + NCHAN; ++c) {
1008		drv_t *d = c->sys;
1009
1010		if (!d || d->chan->type == T_NONE)
1011			continue;
1012
1013		callout_drain (&d->dcd_timeout_handle);
1014	}
1015	splx (s);
1016
1017	s = splhigh ();
1018	for (c = b->chan; c < b->chan + NCHAN; ++c) {
1019		drv_t *d = (drv_t*) c->sys;
1020
1021		if (!d || d->chan->type == T_NONE)
1022			continue;
1023
1024		/* Deallocate buffers. */
1025		cx_bus_dma_mem_free (&d->dmamem);
1026	}
1027	bd->board = 0;
1028	adapter [b->num] = 0;
1029	free (b, M_DEVBUF);
1030	splx (s);
1031
1032	mtx_destroy (&bd->cx_mtx);
1033
1034	return 0;
1035}
1036
1037#ifndef NETGRAPH
1038static void cx_ifstart (struct ifnet *ifp)
1039{
1040	drv_t *d = ifp->if_softc;
1041	bdrv_t *bd = d->board->sys;
1042
1043	CX_LOCK (bd);
1044	cx_start (d);
1045	CX_UNLOCK (bd);
1046}
1047
1048static void cx_ifwatchdog (struct ifnet *ifp)
1049{
1050	drv_t *d = ifp->if_softc;
1051
1052	cx_watchdog (d);
1053}
1054
1055static void cx_tlf (struct sppp *sp)
1056{
1057	drv_t *d = SP2IFP(sp)->if_softc;
1058
1059	CX_DEBUG (d, ("cx_tlf\n"));
1060/*	cx_set_dtr (d->chan, 0);*/
1061/*	cx_set_rts (d->chan, 0);*/
1062	if (!(IFP2SP(d->ifp)->pp_flags & PP_FR) && !(d->ifp->if_flags & PP_CISCO))
1063		sp->pp_down (sp);
1064}
1065
1066static void cx_tls (struct sppp *sp)
1067{
1068	drv_t *d = SP2IFP(sp)->if_softc;
1069
1070	CX_DEBUG (d, ("cx_tls\n"));
1071	if (!(IFP2SP(d->ifp)->pp_flags & PP_FR) && !(d->ifp->if_flags & PP_CISCO))
1072		sp->pp_up (sp);
1073}
1074
1075/*
1076 * Initialization of interface.
1077 * It seems to be never called by upper level.
1078 */
1079static void cx_initialize (void *softc)
1080{
1081	drv_t *d = softc;
1082
1083	CX_DEBUG (d, ("cx_initialize\n"));
1084}
1085
1086/*
1087 * Process an ioctl request.
1088 */
1089static int cx_sioctl (struct ifnet *ifp, u_long cmd, caddr_t data)
1090{
1091	drv_t *d = ifp->if_softc;
1092	bdrv_t *bd = d->board->sys;
1093	int error, s, was_up, should_be_up;
1094
1095	/* No socket ioctls while the channel is in async mode. */
1096	if (d->chan->type == T_NONE || d->chan->mode == M_ASYNC)
1097		return EBUSY;
1098
1099	/* Socket ioctls on slave subchannels are not allowed. */
1100	was_up = (ifp->if_drv_flags & IFF_DRV_RUNNING) != 0;
1101	error = sppp_ioctl (ifp, cmd, data);
1102	if (error)
1103		return error;
1104
1105	if (! (ifp->if_flags & IFF_DEBUG))
1106		d->chan->debug = 0;
1107	else if (! d->chan->debug)
1108		d->chan->debug = 1;
1109
1110	switch (cmd) {
1111	default:	   CX_DEBUG2 (d, ("ioctl 0x%lx\n", cmd)); return 0;
1112	case SIOCADDMULTI: CX_DEBUG2 (d, ("SIOCADDMULTI\n"));     return 0;
1113	case SIOCDELMULTI: CX_DEBUG2 (d, ("SIOCDELMULTI\n"));     return 0;
1114	case SIOCSIFFLAGS: CX_DEBUG2 (d, ("SIOCSIFFLAGS\n"));     break;
1115	case SIOCSIFADDR:  CX_DEBUG2 (d, ("SIOCSIFADDR\n"));      break;
1116	}
1117
1118	/* We get here only in case of SIFFLAGS or SIFADDR. */
1119	s = splhigh ();
1120	CX_LOCK (bd);
1121	should_be_up = (ifp->if_drv_flags & IFF_DRV_RUNNING) != 0;
1122	if (!was_up && should_be_up) {
1123		/* Interface goes up -- start it. */
1124		cx_up (d);
1125		cx_start (d);
1126	} else if (was_up && !should_be_up) {
1127		/* Interface is going down -- stop it. */
1128		/* if ((IFP2SP(d->ifp)->pp_flags & PP_FR) || (ifp->if_flags & PP_CISCO))*/
1129		cx_down (d);
1130	}
1131	CX_UNLOCK (bd);
1132	splx (s);
1133	return 0;
1134}
1135#endif /*NETGRAPH*/
1136
1137/*
1138 * Stop the interface.  Called on splimp().
1139 */
1140static void cx_down (drv_t *d)
1141{
1142	int s = splhigh ();
1143	CX_DEBUG (d, ("cx_down\n"));
1144	cx_set_dtr (d->chan, 0);
1145	cx_set_rts (d->chan, 0);
1146	d->running = 0;
1147	splx (s);
1148}
1149
1150/*
1151 * Start the interface.  Called on splimp().
1152 */
1153static void cx_up (drv_t *d)
1154{
1155	int s = splhigh ();
1156	CX_DEBUG (d, ("cx_up\n"));
1157	cx_set_dtr (d->chan, 1);
1158	cx_set_rts (d->chan, 1);
1159	d->running = 1;
1160	splx (s);
1161}
1162
1163/*
1164 * Start output on the (slave) interface.  Get another datagram to send
1165 * off of the interface queue, and copy it to the interface
1166 * before starting the output.
1167 */
1168static void cx_send (drv_t *d)
1169{
1170	struct mbuf *m;
1171	u_short len;
1172
1173	CX_DEBUG2 (d, ("cx_send\n"));
1174
1175	/* No output if the interface is down. */
1176	if (! d->running)
1177		return;
1178
1179	/* No output if the modem is off. */
1180	if (! cx_get_dsr (d->chan) && ! cx_get_loop(d->chan))
1181		return;
1182
1183	if (cx_buf_free (d->chan)) {
1184		/* Get the packet to send. */
1185#ifdef NETGRAPH
1186		IF_DEQUEUE (&d->hi_queue, m);
1187		if (! m)
1188			IF_DEQUEUE (&d->lo_queue, m);
1189#else
1190		m = sppp_dequeue (d->ifp);
1191#endif
1192		if (! m)
1193			return;
1194#ifndef NETGRAPH
1195		BPF_MTAP (d->ifp, m);
1196#endif
1197		len = m_length (m, NULL);
1198		if (! m->m_next)
1199			cx_send_packet (d->chan, (u_char*)mtod (m, caddr_t),
1200				len, 0);
1201		else {
1202			u_char buf [DMABUFSZ];
1203			m_copydata (m, 0, len, buf);
1204			cx_send_packet (d->chan, buf, len, 0);
1205		}
1206		m_freem (m);
1207
1208		/* Set up transmit timeout, 10 seconds. */
1209#ifdef NETGRAPH
1210		d->timeout = 10;
1211#else
1212		d->ifp->if_timer = 10;
1213#endif
1214	}
1215#ifndef NETGRAPH
1216	d->ifp->if_drv_flags |= IFF_DRV_OACTIVE;
1217#endif
1218}
1219
1220/*
1221 * Start output on the interface.
1222 * Always called on splimp().
1223 */
1224static void cx_start (drv_t *d)
1225{
1226	int s = splhigh ();
1227	if (d->running) {
1228		if (! d->chan->dtr)
1229			cx_set_dtr (d->chan, 1);
1230		if (! d->chan->rts)
1231			cx_set_rts (d->chan, 1);
1232		cx_send (d);
1233	}
1234	splx (s);
1235}
1236
1237/*
1238 * Handle transmit timeouts.
1239 * Recover after lost transmit interrupts.
1240 * Always called on splimp().
1241 */
1242static void cx_watchdog (drv_t *d)
1243{
1244	bdrv_t *bd = d->board->sys;
1245
1246	int s = splhigh ();
1247	CX_LOCK (bd);
1248	CX_DEBUG (d, ("device timeout\n"));
1249	if (d->running) {
1250		cx_setup_chan (d->chan);
1251		cx_start_chan (d->chan, 0, 0);
1252		cx_set_dtr (d->chan, 1);
1253		cx_set_rts (d->chan, 1);
1254		cx_start (d);
1255	}
1256	CX_UNLOCK (bd);
1257	splx (s);
1258}
1259
1260/*
1261 * Transmit callback function.
1262 */
1263static void cx_transmit (cx_chan_t *c, void *attachment, int len)
1264{
1265	drv_t *d = c->sys;
1266
1267	if (!d)
1268		return;
1269
1270	if (c->mode == M_ASYNC && d->tty) {
1271		d->tty->t_state &= ~(TS_BUSY | TS_FLUSH);
1272		d->atimeout = 0;
1273		if (d->tty->t_dev) {
1274			d->intr_action |= CX_WRITE;
1275			MY_SOFT_INTR = 1;
1276			swi_sched (cx_fast_ih, 0);
1277		}
1278		return;
1279	}
1280#ifdef NETGRAPH
1281	d->timeout = 0;
1282#else
1283	++d->ifp->if_opackets;
1284	d->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1285	d->ifp->if_timer = 0;
1286#endif
1287	cx_start (d);
1288}
1289
1290/*
1291 * Process the received packet.
1292 */
1293static void cx_receive (cx_chan_t *c, char *data, int len)
1294{
1295	drv_t *d = c->sys;
1296	struct mbuf *m;
1297	char *cc = data;
1298#ifdef NETGRAPH
1299	int error;
1300#endif
1301
1302	if (!d)
1303		return;
1304
1305	if (c->mode == M_ASYNC && d->tty) {
1306		if (d->tty->t_state & TS_ISOPEN) {
1307			async_q *q = &d->aqueue;
1308			int size = BF_SZ - 1 - AQ_GSZ (q);
1309
1310			if (len <= 0 && !size)
1311				return;
1312
1313			if (len > size) {
1314				c->ierrs++;
1315				cx_error (c, CX_OVERRUN);
1316				len = size - 1;
1317			}
1318
1319			while (len--) {
1320				AQ_PUSH (q, *(unsigned char *)cc);
1321				cc++;
1322			}
1323
1324			d->intr_action |= CX_READ;
1325			MY_SOFT_INTR = 1;
1326			swi_sched (cx_fast_ih, 0);
1327		}
1328		return;
1329	}
1330	if (! d->running)
1331		return;
1332
1333	m = makembuf (data, len);
1334	if (! m) {
1335		CX_DEBUG (d, ("no memory for packet\n"));
1336#ifndef NETGRAPH
1337		++d->ifp->if_iqdrops;
1338#endif
1339		return;
1340	}
1341	if (c->debug > 1)
1342		printmbuf (m);
1343#ifdef NETGRAPH
1344	m->m_pkthdr.rcvif = 0;
1345	NG_SEND_DATA_ONLY (error, d->hook, m);
1346#else
1347	++d->ifp->if_ipackets;
1348	m->m_pkthdr.rcvif = d->ifp;
1349	/* Check if there's a BPF listener on this interface.
1350	 * If so, hand off the raw packet to bpf. */
1351	BPF_TAP (d->ifp, data, len);
1352	IF_ENQUEUE (&d->queue, m);
1353#endif
1354}
1355
1356#define CONDITION(t,tp) (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON))\
1357	    && (!(tp->t_iflag & BRKINT) || (tp->t_iflag & IGNBRK))\
1358	    && (!(tp->t_iflag & PARMRK)\
1359		|| (tp->t_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))\
1360	    && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN))\
1361	    && linesw[tp->t_line]->l_rint == ttyinput)
1362
1363/*
1364 * Error callback function.
1365 */
1366static void cx_error (cx_chan_t *c, int data)
1367{
1368	drv_t *d = c->sys;
1369	async_q *q;
1370
1371	if (!d)
1372		return;
1373
1374	q = &(d->aqueue);
1375
1376	switch (data) {
1377	case CX_FRAME:
1378		CX_DEBUG (d, ("frame error\n"));
1379		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN)
1380			&& (AQ_GSZ (q) < BF_SZ - 1)
1381			&& (!CONDITION((&d->tty->t_termios), (d->tty))
1382			|| !(d->tty->t_iflag & (IGNPAR | PARMRK)))) {
1383			AQ_PUSH (q, TTY_FE);
1384			d->intr_action |= CX_READ;
1385			MY_SOFT_INTR = 1;
1386			swi_sched (cx_fast_ih, 0);
1387		}
1388#ifndef NETGRAPH
1389		else
1390			++d->ifp->if_ierrors;
1391#endif
1392		break;
1393	case CX_CRC:
1394		CX_DEBUG (d, ("crc error\n"));
1395		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN)
1396			&& (AQ_GSZ (q) < BF_SZ - 1)
1397			&& (!CONDITION((&d->tty->t_termios), (d->tty))
1398			|| !(d->tty->t_iflag & INPCK)
1399			|| !(d->tty->t_iflag & (IGNPAR | PARMRK)))) {
1400			AQ_PUSH (q, TTY_PE);
1401			d->intr_action |= CX_READ;
1402			MY_SOFT_INTR = 1;
1403			swi_sched (cx_fast_ih, 0);
1404		}
1405#ifndef NETGRAPH
1406		else
1407			++d->ifp->if_ierrors;
1408#endif
1409		break;
1410	case CX_OVERRUN:
1411		CX_DEBUG (d, ("overrun error\n"));
1412#ifdef TTY_OE
1413		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN)
1414			&& (AQ_GSZ (q) < BF_SZ - 1)
1415			&& (!CONDITION((&d->tty->t_termios), (d->tty)))) {
1416			AQ_PUSH (q, TTY_OE);
1417			d->intr_action |= CX_READ;
1418			MY_SOFT_INTR = 1;
1419			swi_sched (cx_fast_ih, 0);
1420		}
1421#endif
1422#ifndef NETGRAPH
1423		else {
1424			++d->ifp->if_collisions;
1425			++d->ifp->if_ierrors;
1426		}
1427#endif
1428		break;
1429	case CX_OVERFLOW:
1430		CX_DEBUG (d, ("overflow error\n"));
1431#ifndef NETGRAPH
1432		if (c->mode != M_ASYNC)
1433			++d->ifp->if_ierrors;
1434#endif
1435		break;
1436	case CX_UNDERRUN:
1437		CX_DEBUG (d, ("underrun error\n"));
1438		if (c->mode != M_ASYNC) {
1439#ifdef NETGRAPH
1440			d->timeout = 0;
1441#else
1442			++d->ifp->if_oerrors;
1443			d->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1444			d->ifp->if_timer = 0;
1445			cx_start (d);
1446#endif
1447		}
1448		break;
1449	case CX_BREAK:
1450		CX_DEBUG (d, ("break error\n"));
1451		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN)
1452			&& (AQ_GSZ (q) < BF_SZ - 1)
1453			&& (!CONDITION((&d->tty->t_termios), (d->tty))
1454			|| !(d->tty->t_iflag & (IGNBRK | BRKINT | PARMRK)))) {
1455			AQ_PUSH (q, TTY_BI);
1456			d->intr_action |= CX_READ;
1457			MY_SOFT_INTR = 1;
1458			swi_sched (cx_fast_ih, 0);
1459		}
1460#ifndef NETGRAPH
1461		else
1462			++d->ifp->if_ierrors;
1463#endif
1464		break;
1465	default:
1466		CX_DEBUG (d, ("error #%d\n", data));
1467	}
1468}
1469
1470static int cx_topen (struct tty *tp, struct cdev *dev)
1471{
1472	bdrv_t *bd;
1473	drv_t *d;
1474
1475	d = tp->t_sc;
1476	CX_DEBUG2 (d, ("cx_open (serial)\n"));
1477
1478	bd = d->board->sys;
1479
1480	if (d->chan->mode != M_ASYNC)
1481		return (EBUSY);
1482
1483	d->open_dev |= 0x2;
1484	CX_LOCK (bd);
1485	cx_start_chan (d->chan, 0, 0);
1486	cx_set_dtr (d->chan, 1);
1487	cx_set_rts (d->chan, 1);
1488	d->cd = cx_get_cd (d->chan);
1489	CX_UNLOCK (bd);
1490
1491	CX_DEBUG2 (d, ("cx_open done\n"));
1492
1493	return 0;
1494}
1495
1496static void cx_tclose (struct tty *tp)
1497{
1498	drv_t *d;
1499	bdrv_t *bd;
1500
1501	d = tp->t_sc;
1502	CX_DEBUG2 (d, ("cx_close\n"));
1503	bd = d->board->sys;
1504	CX_LOCK (bd);
1505	/* Disable receiver.
1506	 * Transmitter continues sending the queued data. */
1507	cx_enable_receive (d->chan, 0);
1508	CX_UNLOCK (bd);
1509	d->open_dev &= ~0x2;
1510}
1511
1512static int cx_tmodem (struct tty *tp, int sigon, int sigoff)
1513{
1514	drv_t *d;
1515	bdrv_t *bd;
1516
1517	d = tp->t_sc;
1518	bd = d->board->sys;
1519
1520	CX_LOCK (bd);
1521	if (!sigon && !sigoff) {
1522		if (cx_get_dsr (d->chan)) sigon |= SER_DSR;
1523		if (cx_get_cd  (d->chan)) sigon |= SER_DCD;
1524		if (cx_get_cts (d->chan)) sigon |= SER_CTS;
1525		if (d->chan->dtr)	  sigon |= SER_DTR;
1526		if (d->chan->rts)	  sigon |= SER_RTS;
1527		CX_UNLOCK (bd);
1528		return sigon;
1529	}
1530
1531	if (sigon & SER_DTR)
1532		cx_set_dtr (d->chan, 1);
1533	if (sigoff & SER_DTR)
1534		cx_set_dtr (d->chan, 0);
1535	if (sigon & SER_RTS)
1536		cx_set_rts (d->chan, 1);
1537	if (sigoff & SER_RTS)
1538		cx_set_rts (d->chan, 0);
1539	CX_UNLOCK (bd);
1540
1541	return (0);
1542}
1543
1544static int cx_open (struct cdev *dev, int flag, int mode, struct thread *td)
1545{
1546	int unit;
1547	drv_t *d;
1548
1549	d = dev->si_drv1;
1550	unit = d->chan->num;
1551
1552	CX_DEBUG2 (d, ("cx_open unit=%d, flag=0x%x, mode=0x%x\n",
1553		    unit, flag, mode));
1554
1555	d->open_dev |= 0x1;
1556
1557	CX_DEBUG2 (d, ("cx_open done\n"));
1558
1559	return 0;
1560}
1561
1562static int cx_close (struct cdev *dev, int flag, int mode, struct thread *td)
1563{
1564	drv_t *d;
1565
1566	d = dev->si_drv1;
1567	CX_DEBUG2 (d, ("cx_close\n"));
1568	d->open_dev &= ~0x1;
1569	return 0;
1570}
1571
1572static int cx_modem_status (drv_t *d)
1573{
1574	bdrv_t *bd = d->board->sys;
1575	int status = 0, s = splhigh ();
1576	CX_LOCK (bd);
1577	/* Already opened by someone or network interface is up? */
1578	if ((d->chan->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN) &&
1579	    (d->open_dev|0x2)) || (d->chan->mode != M_ASYNC && d->running))
1580		status = TIOCM_LE;	/* always enabled while open */
1581
1582	if (cx_get_dsr (d->chan)) status |= TIOCM_DSR;
1583	if (cx_get_cd  (d->chan)) status |= TIOCM_CD;
1584	if (cx_get_cts (d->chan)) status |= TIOCM_CTS;
1585	if (d->chan->dtr)	  status |= TIOCM_DTR;
1586	if (d->chan->rts)	  status |= TIOCM_RTS;
1587	CX_UNLOCK (bd);
1588	splx (s);
1589	return status;
1590}
1591
1592static int cx_ioctl (struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1593{
1594	drv_t *d;
1595	bdrv_t *bd;
1596	cx_chan_t *c;
1597	struct serial_statistics *st;
1598	int error, s;
1599	char mask[16];
1600
1601	d = dev->si_drv1;
1602	c = d->chan;
1603
1604	bd = d->board->sys;
1605
1606	switch (cmd) {
1607	case SERIAL_GETREGISTERED:
1608		CX_DEBUG2 (d, ("ioctl: getregistered\n"));
1609		bzero (mask, sizeof(mask));
1610		for (s=0; s<NCX*NCHAN; ++s)
1611			if (channel [s])
1612				mask [s/8] |= 1 << (s & 7);
1613		bcopy (mask, data, sizeof (mask));
1614		return 0;
1615
1616	case SERIAL_GETPORT:
1617		CX_DEBUG2 (d, ("ioctl: getport\n"));
1618		s = splhigh ();
1619		CX_LOCK (bd);
1620		*(int *)data = cx_get_port (c);
1621		CX_UNLOCK (bd);
1622		splx (s);
1623		if (*(int *)data<0)
1624			return (EINVAL);
1625		else
1626			return 0;
1627
1628	case SERIAL_SETPORT:
1629		CX_DEBUG2 (d, ("ioctl: setproto\n"));
1630		/* Only for superuser! */
1631		error = priv_check (td, PRIV_DRIVER);
1632		if (error)
1633			return error;
1634
1635		s = splhigh ();
1636		CX_LOCK (bd);
1637		cx_set_port (c, *(int *)data);
1638		CX_UNLOCK (bd);
1639		splx (s);
1640		return 0;
1641
1642#ifndef NETGRAPH
1643	case SERIAL_GETPROTO:
1644		CX_DEBUG2 (d, ("ioctl: getproto\n"));
1645		s = splhigh ();
1646		CX_LOCK (bd);
1647		strcpy ((char*)data, (c->mode == M_ASYNC) ? "async" :
1648			(IFP2SP(d->ifp)->pp_flags & PP_FR) ? "fr" :
1649			(d->ifp->if_flags & PP_CISCO) ? "cisco" : "ppp");
1650		CX_UNLOCK (bd);
1651		splx (s);
1652		return 0;
1653
1654	case SERIAL_SETPROTO:
1655		CX_DEBUG2 (d, ("ioctl: setproto\n"));
1656		/* Only for superuser! */
1657		error = priv_check (td, PRIV_DRIVER);
1658		if (error)
1659			return error;
1660		if (c->mode == M_ASYNC)
1661			return EBUSY;
1662		if (d->ifp->if_drv_flags & IFF_DRV_RUNNING)
1663			return EBUSY;
1664		if (! strcmp ("cisco", (char*)data)) {
1665			IFP2SP(d->ifp)->pp_flags &= ~(PP_FR);
1666			IFP2SP(d->ifp)->pp_flags |= PP_KEEPALIVE;
1667			d->ifp->if_flags |= PP_CISCO;
1668		} else if (! strcmp ("fr", (char*)data)) {
1669			d->ifp->if_flags &= ~(PP_CISCO);
1670			IFP2SP(d->ifp)->pp_flags |= PP_FR | PP_KEEPALIVE;
1671		} else if (! strcmp ("ppp", (char*)data)) {
1672			IFP2SP(d->ifp)->pp_flags &= ~(PP_FR | PP_KEEPALIVE);
1673			d->ifp->if_flags &= ~(PP_CISCO);
1674		} else
1675			return EINVAL;
1676		return 0;
1677
1678	case SERIAL_GETKEEPALIVE:
1679		CX_DEBUG2 (d, ("ioctl: getkeepalive\n"));
1680		if ((IFP2SP(d->ifp)->pp_flags & PP_FR) ||
1681		    (d->ifp->if_flags & PP_CISCO) ||
1682		    (c->mode == M_ASYNC))
1683			return EINVAL;
1684		s = splhigh ();
1685		CX_LOCK (bd);
1686		*(int*)data = (IFP2SP(d->ifp)->pp_flags & PP_KEEPALIVE) ? 1 : 0;
1687		CX_UNLOCK (bd);
1688		splx (s);
1689		return 0;
1690
1691	case SERIAL_SETKEEPALIVE:
1692		CX_DEBUG2 (d, ("ioctl: setkeepalive\n"));
1693		/* Only for superuser! */
1694		error = priv_check (td, PRIV_DRIVER);
1695		if (error)
1696			return error;
1697		if ((IFP2SP(d->ifp)->pp_flags & PP_FR) ||
1698			(d->ifp->if_flags & PP_CISCO))
1699			return EINVAL;
1700		s = splhigh ();
1701		CX_LOCK (bd);
1702		if (*(int*)data)
1703			IFP2SP(d->ifp)->pp_flags |= PP_KEEPALIVE;
1704		else
1705			IFP2SP(d->ifp)->pp_flags &= ~PP_KEEPALIVE;
1706		CX_UNLOCK (bd);
1707		splx (s);
1708		return 0;
1709#endif /*NETGRAPH*/
1710
1711	case SERIAL_GETMODE:
1712		CX_DEBUG2 (d, ("ioctl: getmode\n"));
1713		s = splhigh ();
1714		CX_LOCK (bd);
1715		*(int*)data = (c->mode == M_ASYNC) ?
1716			SERIAL_ASYNC : SERIAL_HDLC;
1717		CX_UNLOCK (bd);
1718		splx (s);
1719		return 0;
1720
1721	case SERIAL_SETMODE:
1722		CX_DEBUG2 (d, ("ioctl: setmode\n"));
1723		/* Only for superuser! */
1724		error = priv_check (td, PRIV_DRIVER);
1725		if (error)
1726			return error;
1727
1728		/* Somebody is waiting for carrier? */
1729		if (d->lock)
1730			return EBUSY;
1731		/* /dev/ttyXX is already opened by someone? */
1732		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN) &&
1733		    (d->open_dev|0x2))
1734			return EBUSY;
1735		/* Network interface is up?
1736		 * Cannot change to async mode. */
1737		if (c->mode != M_ASYNC && d->running &&
1738		    (*(int*)data == SERIAL_ASYNC))
1739			return EBUSY;
1740
1741		s = splhigh ();
1742		CX_LOCK (bd);
1743		if (c->mode == M_HDLC && *(int*)data == SERIAL_ASYNC) {
1744			cx_set_mode (c, M_ASYNC);
1745			cx_enable_receive (c, 0);
1746			cx_enable_transmit (c, 0);
1747		} else if (c->mode == M_ASYNC && *(int*)data == SERIAL_HDLC) {
1748			cx_set_mode (c, M_HDLC);
1749			cx_enable_receive (c, 1);
1750			cx_enable_transmit (c, 1);
1751		}
1752		CX_UNLOCK (bd);
1753		splx (s);
1754		return 0;
1755
1756	case SERIAL_GETSTAT:
1757		CX_DEBUG2 (d, ("ioctl: getestat\n"));
1758		st = (struct serial_statistics*) data;
1759		s = splhigh ();
1760		CX_LOCK (bd);
1761		st->rintr  = c->rintr;
1762		st->tintr  = c->tintr;
1763		st->mintr  = c->mintr;
1764		st->ibytes = c->ibytes;
1765		st->ipkts  = c->ipkts;
1766		st->ierrs  = c->ierrs;
1767		st->obytes = c->obytes;
1768		st->opkts  = c->opkts;
1769		st->oerrs  = c->oerrs;
1770		CX_UNLOCK (bd);
1771		splx (s);
1772		return 0;
1773
1774	case SERIAL_CLRSTAT:
1775		CX_DEBUG2 (d, ("ioctl: clrstat\n"));
1776		/* Only for superuser! */
1777		error = priv_check (td, PRIV_DRIVER);
1778		if (error)
1779			return error;
1780		s = splhigh ();
1781		CX_LOCK (bd);
1782		c->rintr = 0;
1783		c->tintr = 0;
1784		c->mintr = 0;
1785		c->ibytes = 0;
1786		c->ipkts = 0;
1787		c->ierrs = 0;
1788		c->obytes = 0;
1789		c->opkts = 0;
1790		c->oerrs = 0;
1791		CX_UNLOCK (bd);
1792		splx (s);
1793		return 0;
1794
1795	case SERIAL_GETBAUD:
1796		CX_DEBUG2 (d, ("ioctl: getbaud\n"));
1797		if (c->mode == M_ASYNC)
1798			return EINVAL;
1799		s = splhigh ();
1800		CX_LOCK (bd);
1801		*(long*)data = cx_get_baud(c);
1802		CX_UNLOCK (bd);
1803		splx (s);
1804		return 0;
1805
1806	case SERIAL_SETBAUD:
1807		CX_DEBUG2 (d, ("ioctl: setbaud\n"));
1808		/* Only for superuser! */
1809		error = priv_check (td, PRIV_DRIVER);
1810		if (error)
1811			return error;
1812		if (c->mode == M_ASYNC)
1813			return EINVAL;
1814		s = splhigh ();
1815		CX_LOCK (bd);
1816		cx_set_baud (c, *(long*)data);
1817		CX_UNLOCK (bd);
1818		splx (s);
1819		return 0;
1820
1821	case SERIAL_GETLOOP:
1822		CX_DEBUG2 (d, ("ioctl: getloop\n"));
1823		if (c->mode == M_ASYNC)
1824			return EINVAL;
1825		s = splhigh ();
1826		CX_LOCK (bd);
1827		*(int*)data = cx_get_loop (c);
1828		CX_UNLOCK (bd);
1829		splx (s);
1830		return 0;
1831
1832	case SERIAL_SETLOOP:
1833		CX_DEBUG2 (d, ("ioctl: setloop\n"));
1834		/* Only for superuser! */
1835		error = priv_check (td, PRIV_DRIVER);
1836		if (error)
1837			return error;
1838		if (c->mode == M_ASYNC)
1839			return EINVAL;
1840		s = splhigh ();
1841		CX_LOCK (bd);
1842		cx_set_loop (c, *(int*)data);
1843		CX_UNLOCK (bd);
1844		splx (s);
1845		return 0;
1846
1847	case SERIAL_GETDPLL:
1848		CX_DEBUG2 (d, ("ioctl: getdpll\n"));
1849		if (c->mode == M_ASYNC)
1850			return EINVAL;
1851		s = splhigh ();
1852		CX_LOCK (bd);
1853		*(int*)data = cx_get_dpll (c);
1854		CX_UNLOCK (bd);
1855		splx (s);
1856		return 0;
1857
1858	case SERIAL_SETDPLL:
1859		CX_DEBUG2 (d, ("ioctl: setdpll\n"));
1860		/* Only for superuser! */
1861		error = priv_check (td, PRIV_DRIVER);
1862		if (error)
1863			return error;
1864		if (c->mode == M_ASYNC)
1865			return EINVAL;
1866		s = splhigh ();
1867		CX_LOCK (bd);
1868		cx_set_dpll (c, *(int*)data);
1869		CX_UNLOCK (bd);
1870		splx (s);
1871		return 0;
1872
1873	case SERIAL_GETNRZI:
1874		CX_DEBUG2 (d, ("ioctl: getnrzi\n"));
1875		if (c->mode == M_ASYNC)
1876			return EINVAL;
1877		s = splhigh ();
1878		CX_LOCK (bd);
1879		*(int*)data = cx_get_nrzi (c);
1880		CX_UNLOCK (bd);
1881		splx (s);
1882		return 0;
1883
1884	case SERIAL_SETNRZI:
1885		CX_DEBUG2 (d, ("ioctl: setnrzi\n"));
1886		/* Only for superuser! */
1887		error = priv_check (td, PRIV_DRIVER);
1888		if (error)
1889			return error;
1890		if (c->mode == M_ASYNC)
1891			return EINVAL;
1892		s = splhigh ();
1893		CX_LOCK (bd);
1894		cx_set_nrzi (c, *(int*)data);
1895		CX_UNLOCK (bd);
1896		splx (s);
1897		return 0;
1898
1899	case SERIAL_GETDEBUG:
1900		CX_DEBUG2 (d, ("ioctl: getdebug\n"));
1901		s = splhigh ();
1902		CX_LOCK (bd);
1903		*(int*)data = c->debug;
1904		CX_UNLOCK (bd);
1905		splx (s);
1906		return 0;
1907
1908	case SERIAL_SETDEBUG:
1909		CX_DEBUG2 (d, ("ioctl: setdebug\n"));
1910		/* Only for superuser! */
1911		error = priv_check (td, PRIV_DRIVER);
1912		if (error)
1913			return error;
1914		s = splhigh ();
1915		CX_LOCK (bd);
1916		c->debug = *(int*)data;
1917		CX_UNLOCK (bd);
1918		splx (s);
1919#ifndef	NETGRAPH
1920		if (d->chan->debug)
1921			d->ifp->if_flags |= IFF_DEBUG;
1922		else
1923			d->ifp->if_flags &= (~IFF_DEBUG);
1924#endif
1925		return 0;
1926	}
1927
1928	switch (cmd) {
1929	case TIOCSDTR:	/* Set DTR */
1930		CX_DEBUG2 (d, ("ioctl: tiocsdtr\n"));
1931		s = splhigh ();
1932		CX_LOCK (bd);
1933		cx_set_dtr (c, 1);
1934		CX_UNLOCK (bd);
1935		splx (s);
1936		return 0;
1937
1938	case TIOCCDTR:	/* Clear DTR */
1939		CX_DEBUG2 (d, ("ioctl: tioccdtr\n"));
1940		s = splhigh ();
1941		CX_LOCK (bd);
1942		cx_set_dtr (c, 0);
1943		CX_UNLOCK (bd);
1944		splx (s);
1945		return 0;
1946
1947	case TIOCMSET:	/* Set DTR/RTS */
1948		CX_DEBUG2 (d, ("ioctl: tiocmset\n"));
1949		s = splhigh ();
1950		CX_LOCK (bd);
1951		cx_set_dtr (c, (*(int*)data & TIOCM_DTR) ? 1 : 0);
1952		cx_set_rts (c, (*(int*)data & TIOCM_RTS) ? 1 : 0);
1953		CX_UNLOCK (bd);
1954		splx (s);
1955		return 0;
1956
1957	case TIOCMBIS:	/* Add DTR/RTS */
1958		CX_DEBUG2 (d, ("ioctl: tiocmbis\n"));
1959		s = splhigh ();
1960		CX_LOCK (bd);
1961		if (*(int*)data & TIOCM_DTR) cx_set_dtr (c, 1);
1962		if (*(int*)data & TIOCM_RTS) cx_set_rts (c, 1);
1963		CX_UNLOCK (bd);
1964		splx (s);
1965		return 0;
1966
1967	case TIOCMBIC:	/* Clear DTR/RTS */
1968		CX_DEBUG2 (d, ("ioctl: tiocmbic\n"));
1969		s = splhigh ();
1970		CX_LOCK (bd);
1971		if (*(int*)data & TIOCM_DTR) cx_set_dtr (c, 0);
1972		if (*(int*)data & TIOCM_RTS) cx_set_rts (c, 0);
1973		CX_UNLOCK (bd);
1974		splx (s);
1975		return 0;
1976
1977	case TIOCMGET:	/* Get modem status */
1978		CX_DEBUG2 (d, ("ioctl: tiocmget\n"));
1979		*(int*)data = cx_modem_status (d);
1980		return 0;
1981
1982	}
1983
1984	CX_DEBUG2 (d, ("ioctl: 0x%lx\n", cmd));
1985	return ENOTTY;
1986}
1987
1988void cx_softintr (void *unused)
1989{
1990	drv_t *d;
1991	bdrv_t *bd;
1992	async_q *q;
1993	int i, s, ic, k;
1994	while (MY_SOFT_INTR) {
1995		MY_SOFT_INTR = 0;
1996		for (i=0; i<NCX*NCHAN; ++i) {
1997			d = channel [i];
1998			if (!d || !d->chan || d->chan->type == T_NONE
1999			    || d->chan->mode != M_ASYNC || !d->tty
2000			    || !d->tty->t_dev)
2001				continue;
2002			bd = d->board->sys;
2003			s = splhigh ();
2004			CX_LOCK (bd);
2005			if (d->intr_action & CX_READ) {
2006				q = &(d->aqueue);
2007				if (d->tty->t_state & TS_CAN_BYPASS_L_RINT) {
2008					k = AQ_GSZ(q);
2009					if (d->tty->t_rawq.c_cc + k >
2010						d->tty->t_ihiwat
2011					    && (d->tty->t_cflag & CRTS_IFLOW
2012						|| d->tty->t_iflag & IXOFF)
2013					    && !(d->tty->t_state & TS_TBLOCK))
2014						ttyblock(d->tty);
2015					d->tty->t_rawcc += k;
2016					while (k>0) {
2017						k--;
2018						AQ_POP (q, ic);
2019						CX_UNLOCK (bd);
2020						splx (s);
2021						putc (ic, &d->tty->t_rawq);
2022						s = splhigh ();
2023						CX_LOCK (bd);
2024					}
2025					ttwakeup(d->tty);
2026					if (d->tty->t_state & TS_TTSTOP
2027					    && (d->tty->t_iflag & IXANY
2028						|| d->tty->t_cc[VSTART] ==
2029						d->tty->t_cc[VSTOP])) {
2030						d->tty->t_state &= ~TS_TTSTOP;
2031						d->tty->t_lflag &= ~FLUSHO;
2032						d->intr_action |= CX_WRITE;
2033					}
2034				} else {
2035					while (q->end != q->beg) {
2036						AQ_POP (q, ic);
2037						CX_UNLOCK (bd);
2038						splx (s);
2039						ttyld_rint (d->tty, ic);
2040						s = splhigh ();
2041						CX_LOCK (bd);
2042					}
2043				}
2044				d->intr_action &= ~CX_READ;
2045			}
2046			splx (s);
2047			CX_UNLOCK (bd);
2048
2049			s = splhigh ();
2050			CX_LOCK (bd);
2051			if (d->intr_action & CX_WRITE) {
2052				if (d->tty->t_line)
2053					ttyld_start (d->tty);
2054				else
2055					cx_oproc (d->tty);
2056				d->intr_action &= ~CX_WRITE;
2057			}
2058			CX_UNLOCK (bd);
2059			splx (s);
2060
2061		}
2062	}
2063}
2064
2065/*
2066 * Fill transmitter buffer with data.
2067 */
2068static void cx_oproc (struct tty *tp)
2069{
2070	int s, k;
2071	drv_t *d;
2072	bdrv_t *bd;
2073	static u_char buf[DMABUFSZ];
2074	u_char *p;
2075	u_short len = 0, sublen = 0;
2076
2077	d = tp->t_sc;
2078	bd = d->board->sys;
2079
2080	CX_DEBUG2 (d, ("cx_oproc\n"));
2081
2082	s = splhigh ();
2083	CX_LOCK (bd);
2084
2085	if (tp->t_cflag & CRTSCTS && (tp->t_state & TS_TBLOCK) && d->chan->rts)
2086		cx_set_rts (d->chan, 0);
2087	else if (tp->t_cflag & CRTSCTS && ! (tp->t_state & TS_TBLOCK) && ! d->chan->rts)
2088		cx_set_rts (d->chan, 1);
2089
2090	if (! (tp->t_state & (TS_TIMEOUT | TS_TTSTOP))) {
2091		/* Start transmitter. */
2092		cx_enable_transmit (d->chan, 1);
2093
2094		/* Is it busy? */
2095		if (! cx_buf_free (d->chan)) {
2096			tp->t_state |= TS_BUSY;
2097			CX_UNLOCK (bd);
2098			splx (s);
2099			return;
2100		}
2101		if (tp->t_iflag & IXOFF) {
2102			p = (buf + (DMABUFSZ/2));
2103			sublen = q_to_b (&tp->t_outq, p, (DMABUFSZ/2));
2104			k = sublen;
2105			while (k--) {
2106				/* Send XON/XOFF out of band. */
2107				if (*p == tp->t_cc[VSTOP]) {
2108					cx_xflow_ctl (d->chan, 0);
2109					p++;
2110					continue;
2111				}
2112				if (*p == tp->t_cc[VSTART]) {
2113					cx_xflow_ctl (d->chan, 1);
2114					p++;
2115					continue;
2116				}
2117				buf[len] = *p;
2118				len++;
2119				p++;
2120			}
2121		} else {
2122			p = buf;
2123			len = q_to_b (&tp->t_outq, p, (DMABUFSZ/2));
2124		}
2125		if (len) {
2126			cx_send_packet (d->chan, buf, len, 0);
2127			tp->t_state |= TS_BUSY;
2128			d->atimeout = 10;
2129			CX_DEBUG2 (d, ("out %d bytes\n", len));
2130		}
2131	}
2132	ttwwakeup (tp);
2133	CX_UNLOCK (bd);
2134	splx (s);
2135}
2136
2137static int cx_param (struct tty *tp, struct termios *t)
2138{
2139	drv_t *d;
2140	bdrv_t *bd;
2141	int s, bits, parity;
2142
2143	d = tp->t_sc;
2144	bd = d->board->sys;
2145
2146	s = splhigh ();
2147	CX_LOCK (bd);
2148	if (t->c_ospeed == 0) {
2149		/* Clear DTR and RTS. */
2150		cx_set_dtr (d->chan, 0);
2151		CX_UNLOCK (bd);
2152		splx (s);
2153		CX_DEBUG2 (d, ("cx_param (hangup)\n"));
2154		return 0;
2155	}
2156	CX_DEBUG2 (d, ("cx_param\n"));
2157
2158	/* Check requested parameters. */
2159	if (t->c_ospeed < 300 || t->c_ospeed > 256*1024) {
2160		CX_UNLOCK (bd);
2161		splx (s);
2162		return EINVAL;
2163	}
2164	if (t->c_ispeed && (t->c_ispeed < 300 || t->c_ispeed > 256*1024)) {
2165		CX_UNLOCK (bd);
2166		splx (s);
2167		return EINVAL;
2168	}
2169
2170  	/* And copy them to tty and channel structures. */
2171	tp->t_ispeed = t->c_ispeed = tp->t_ospeed = t->c_ospeed;
2172	tp->t_cflag = t->c_cflag;
2173
2174	/* Set character length and parity mode. */
2175	switch (t->c_cflag & CSIZE) {
2176	default:
2177	case CS8: bits = 8; break;
2178	case CS7: bits = 7; break;
2179	case CS6: bits = 6; break;
2180	case CS5: bits = 5; break;
2181	}
2182
2183	parity = ((t->c_cflag & PARENB) ? 1 : 0) *
2184		 (1 + ((t->c_cflag & PARODD) ? 0 : 1));
2185
2186	/* Set current channel number. */
2187	if (! d->chan->dtr)
2188		cx_set_dtr (d->chan, 1);
2189
2190	ttyldoptim (tp);
2191	cx_set_async_param (d->chan, t->c_ospeed, bits, parity, (t->c_cflag & CSTOPB),
2192		!(t->c_cflag & PARENB), (t->c_cflag & CRTSCTS),
2193		(t->c_iflag & IXON), (t->c_iflag & IXANY),
2194		t->c_cc[VSTART], t->c_cc[VSTOP]);
2195	CX_UNLOCK (bd);
2196	splx (s);
2197	return 0;
2198}
2199
2200/*
2201 * Stop output on a line
2202 */
2203static void cx_stop (struct tty *tp, int flag)
2204{
2205	drv_t *d;
2206	bdrv_t *bd;
2207	int s;
2208
2209	d = tp->t_sc;
2210	bd = d->board->sys;
2211
2212	s = splhigh ();
2213	CX_LOCK (bd);
2214	if (tp->t_state & TS_BUSY) {
2215		/* Stop transmitter */
2216		CX_DEBUG2 (d, ("cx_stop\n"));
2217		cx_transmitter_ctl (d->chan, 0);
2218	}
2219	CX_UNLOCK (bd);
2220	splx (s);
2221}
2222
2223/*
2224 * Process the (delayed) carrier signal setup.
2225 */
2226static void cx_carrier (void *arg)
2227{
2228	drv_t *d = arg;
2229	bdrv_t *bd = d->board->sys;
2230	cx_chan_t *c = d->chan;
2231	int s, cd;
2232
2233	s = splhigh ();
2234	CX_LOCK (bd);
2235	cd = cx_get_cd (c);
2236	if (d->cd != cd) {
2237		if (cd) {
2238			CX_DEBUG (d, ("carrier on\n"));
2239			d->cd = 1;
2240			CX_UNLOCK (bd);
2241			splx (s);
2242			if (d->tty)
2243				ttyld_modem(d->tty, 1);
2244		} else {
2245			CX_DEBUG (d, ("carrier loss\n"));
2246			d->cd = 0;
2247			CX_UNLOCK (bd);
2248			splx (s);
2249			if (d->tty)
2250				ttyld_modem(d->tty, 0);
2251		}
2252	} else {
2253		CX_UNLOCK (bd);
2254		splx (s);
2255	}
2256}
2257
2258/*
2259 * Modem signal callback function.
2260 */
2261static void cx_modem (cx_chan_t *c)
2262{
2263	drv_t *d = c->sys;
2264
2265	if (!d || c->mode != M_ASYNC)
2266		return;
2267	/* Handle carrier detect/loss. */
2268	/* Carrier changed - delay processing DCD for a while
2269	 * to give both sides some time to initialize. */
2270	callout_reset (&d->dcd_timeout_handle, hz/2, cx_carrier, d);
2271}
2272
2273#ifdef NETGRAPH
2274static int ng_cx_constructor (node_p node)
2275{
2276	drv_t *d = NG_NODE_PRIVATE (node);
2277	CX_DEBUG (d, ("Constructor\n"));
2278	return EINVAL;
2279}
2280
2281static int ng_cx_newhook (node_p node, hook_p hook, const char *name)
2282{
2283	int s;
2284	drv_t *d = NG_NODE_PRIVATE (node);
2285	bdrv_t *bd = d->board->sys;
2286
2287	if (d->chan->mode == M_ASYNC)
2288		return EINVAL;
2289
2290	/* Attach debug hook */
2291	if (strcmp (name, NG_CX_HOOK_DEBUG) == 0) {
2292		NG_HOOK_SET_PRIVATE (hook, NULL);
2293		d->debug_hook = hook;
2294		return 0;
2295	}
2296
2297	/* Check for raw hook */
2298	if (strcmp (name, NG_CX_HOOK_RAW) != 0)
2299		return EINVAL;
2300
2301	NG_HOOK_SET_PRIVATE (hook, d);
2302	d->hook = hook;
2303	s = splhigh ();
2304	CX_LOCK (bd);
2305	cx_up (d);
2306	CX_UNLOCK (bd);
2307	splx (s);
2308	return 0;
2309}
2310
2311static int print_modems (char *s, cx_chan_t *c, int need_header)
2312{
2313	int status = cx_modem_status (c->sys);
2314	int length = 0;
2315
2316	if (need_header)
2317		length += sprintf (s + length, "  LE   DTR  DSR  RTS  CTS  CD\n");
2318	length += sprintf (s + length, "%4s %4s %4s %4s %4s %4s\n",
2319		status & TIOCM_LE  ? "On" : "-",
2320		status & TIOCM_DTR ? "On" : "-",
2321		status & TIOCM_DSR ? "On" : "-",
2322		status & TIOCM_RTS ? "On" : "-",
2323		status & TIOCM_CTS ? "On" : "-",
2324		status & TIOCM_CD  ? "On" : "-");
2325	return length;
2326}
2327
2328static int print_stats (char *s, cx_chan_t *c, int need_header)
2329{
2330	int length = 0;
2331
2332	if (need_header)
2333		length += sprintf (s + length, "  Rintr   Tintr   Mintr   Ibytes   Ipkts   Ierrs   Obytes   Opkts   Oerrs\n");
2334	length += sprintf (s + length, "%7ld %7ld %7ld %8ld %7ld %7ld %8ld %7ld %7ld\n",
2335		c->rintr, c->tintr, c->mintr, c->ibytes, c->ipkts,
2336		c->ierrs, c->obytes, c->opkts, c->oerrs);
2337	return length;
2338}
2339
2340static int print_chan (char *s, cx_chan_t *c)
2341{
2342	drv_t *d = c->sys;
2343	int length = 0;
2344
2345	length += sprintf (s + length, "cx%d", c->board->num * NCHAN + c->num);
2346	if (d->chan->debug)
2347		length += sprintf (s + length, " debug=%d", d->chan->debug);
2348
2349	if (cx_get_baud (c))
2350		length += sprintf (s + length, " %ld", cx_get_baud (c));
2351	else
2352		length += sprintf (s + length, " extclock");
2353
2354	if (c->mode == M_HDLC) {
2355		length += sprintf (s + length, " dpll=%s", cx_get_dpll (c) ? "on" : "off");
2356		length += sprintf (s + length, " nrzi=%s", cx_get_nrzi (c) ? "on" : "off");
2357	}
2358
2359	length += sprintf (s + length, " loop=%s", cx_get_loop (c) ? "on\n" : "off\n");
2360	return length;
2361}
2362
2363static int ng_cx_rcvmsg (node_p node, item_p item, hook_p lasthook)
2364{
2365	drv_t *d = NG_NODE_PRIVATE (node);
2366	struct ng_mesg *msg;
2367	struct ng_mesg *resp = NULL;
2368	int error = 0;
2369
2370	if (!d)
2371		return EINVAL;
2372
2373	CX_DEBUG (d, ("Rcvmsg\n"));
2374	NGI_GET_MSG (item, msg);
2375	switch (msg->header.typecookie) {
2376	default:
2377		error = EINVAL;
2378		break;
2379
2380	case NGM_CX_COOKIE:
2381		printf ("Don't forget to implement\n");
2382		error = EINVAL;
2383		break;
2384
2385	case NGM_GENERIC_COOKIE:
2386		switch (msg->header.cmd) {
2387		default:
2388			error = EINVAL;
2389			break;
2390
2391		case NGM_TEXT_STATUS: {
2392			char *s;
2393			int l = 0;
2394			int dl = sizeof (struct ng_mesg) + 730;
2395
2396			NG_MKRESPONSE (resp, msg, dl, M_NOWAIT);
2397			if (! resp) {
2398				error = ENOMEM;
2399				break;
2400			}
2401			bzero (resp, dl);
2402			s = (resp)->data;
2403			l += print_chan (s + l, d->chan);
2404			l += print_stats (s + l, d->chan, 1);
2405			l += print_modems (s + l, d->chan, 1);
2406			strncpy ((resp)->header.cmdstr, "status", NG_CMDSTRLEN);
2407			}
2408			break;
2409		}
2410		break;
2411	}
2412	NG_RESPOND_MSG (error, node, item, resp);
2413	NG_FREE_MSG (msg);
2414	return error;
2415}
2416
2417static int ng_cx_rcvdata (hook_p hook, item_p item)
2418{
2419	drv_t *d = NG_NODE_PRIVATE (NG_HOOK_NODE(hook));
2420	struct mbuf *m;
2421	struct ng_tag_prio *ptag;
2422	bdrv_t *bd;
2423	struct ifqueue *q;
2424	int s;
2425
2426	NGI_GET_M (item, m);
2427	NG_FREE_ITEM (item);
2428	if (! NG_HOOK_PRIVATE (hook) || ! d) {
2429		NG_FREE_M (m);
2430		return ENETDOWN;
2431	}
2432
2433	bd = d->board->sys;
2434	/* Check for high priority data */
2435	if ((ptag = (struct ng_tag_prio *)m_tag_locate(m, NGM_GENERIC_COOKIE,
2436	    NG_TAG_PRIO, NULL)) != NULL && (ptag->priority > NG_PRIO_CUTOFF) )
2437		q = &d->hi_queue;
2438	else
2439		q = &d->lo_queue;
2440
2441	s = splhigh ();
2442	CX_LOCK (bd);
2443	IF_LOCK (q);
2444	if (_IF_QFULL (q)) {
2445		_IF_DROP (q);
2446		IF_UNLOCK (q);
2447		CX_UNLOCK (bd);
2448		splx (s);
2449		NG_FREE_M (m);
2450		return ENOBUFS;
2451	}
2452	_IF_ENQUEUE (q, m);
2453	IF_UNLOCK (q);
2454	cx_start (d);
2455	CX_UNLOCK (bd);
2456	splx (s);
2457	return 0;
2458}
2459
2460static int ng_cx_rmnode (node_p node)
2461{
2462	drv_t *d = NG_NODE_PRIVATE (node);
2463	bdrv_t *bd;
2464
2465	CX_DEBUG (d, ("Rmnode\n"));
2466	if (d && d->running) {
2467		int s = splhigh ();
2468		bd = d->board->sys;
2469		CX_LOCK (bd);
2470		cx_down (d);
2471		CX_UNLOCK (bd);
2472		splx (s);
2473	}
2474#ifdef	KLD_MODULE
2475	if (node->nd_flags & NGF_REALLY_DIE) {
2476		NG_NODE_SET_PRIVATE (node, NULL);
2477		NG_NODE_UNREF (node);
2478	}
2479	NG_NODE_REVIVE(node);		/* Persistant node */
2480#endif
2481	return 0;
2482}
2483
2484static void ng_cx_watchdog (void *arg)
2485{
2486	drv_t *d = arg;
2487
2488	if (d->timeout == 1)
2489		cx_watchdog (d);
2490	if (d->timeout)
2491		d->timeout--;
2492	callout_reset (&d->timeout_handle, hz, ng_cx_watchdog, d);
2493}
2494
2495static int ng_cx_connect (hook_p hook)
2496{
2497	drv_t *d = NG_NODE_PRIVATE (NG_HOOK_NODE (hook));
2498
2499	callout_reset (&d->timeout_handle, hz, ng_cx_watchdog, d);
2500	return 0;
2501}
2502
2503static int ng_cx_disconnect (hook_p hook)
2504{
2505	drv_t *d = NG_NODE_PRIVATE (NG_HOOK_NODE (hook));
2506	bdrv_t *bd = d->board->sys;
2507	int s;
2508
2509	s = splhigh ();
2510	CX_LOCK (bd);
2511	if (NG_HOOK_PRIVATE (hook))
2512		cx_down (d);
2513	CX_UNLOCK (bd);
2514	splx (s);
2515	/* If we were wait it than it reasserted now, just stop it. */
2516	if (!callout_drain (&d->timeout_handle))
2517		callout_stop (&d->timeout_handle);
2518	return 0;
2519}
2520#endif /*NETGRAPH*/
2521
2522static int cx_modevent (module_t mod, int type, void *unused)
2523{
2524	static int load_count = 0;
2525
2526	if (cx_mpsafenet)
2527		cx_cdevsw.d_flags &= ~D_NEEDGIANT;
2528
2529	switch (type) {
2530	case MOD_LOAD:
2531#ifdef NETGRAPH
2532		if (ng_newtype (&typestruct))
2533			printf ("Failed to register ng_cx\n");
2534#endif
2535		++load_count;
2536
2537		callout_init (&timeout_handle, cx_mpsafenet?CALLOUT_MPSAFE:0);
2538		callout_reset (&timeout_handle, hz*5, cx_timeout, 0);
2539		/* Software interrupt. */
2540		swi_add(&tty_intr_event, "cx", cx_softintr, NULL, SWI_TTY,
2541		    (cx_mpsafenet?INTR_MPSAFE:0), &cx_fast_ih);
2542		break;
2543	case MOD_UNLOAD:
2544		if (load_count == 1) {
2545			printf ("Removing device entry for Sigma\n");
2546#ifdef NETGRAPH
2547			ng_rmtype (&typestruct);
2548#endif
2549		}
2550		/* If we were wait it than it reasserted now, just stop it. */
2551		if (!callout_drain (&timeout_handle))
2552			callout_stop (&timeout_handle);
2553		swi_remove (cx_fast_ih);
2554		--load_count;
2555		break;
2556	case MOD_SHUTDOWN:
2557		break;
2558	}
2559	return 0;
2560}
2561
2562#ifdef NETGRAPH
2563static struct ng_type typestruct = {
2564	.version	= NG_ABI_VERSION,
2565	.name		= NG_CX_NODE_TYPE,
2566	.constructor	= ng_cx_constructor,
2567	.rcvmsg		= ng_cx_rcvmsg,
2568	.shutdown	= ng_cx_rmnode,
2569	.newhook	= ng_cx_newhook,
2570	.connect	= ng_cx_connect,
2571	.rcvdata	= ng_cx_rcvdata,
2572	.disconnect	= ng_cx_disconnect,
2573};
2574#endif /*NETGRAPH*/
2575
2576#ifdef NETGRAPH
2577MODULE_DEPEND (ng_cx, netgraph, NG_ABI_VERSION, NG_ABI_VERSION, NG_ABI_VERSION);
2578#else
2579MODULE_DEPEND (isa_cx, sppp, 1, 1, 1);
2580#endif
2581DRIVER_MODULE (cx, isa, cx_isa_driver, cx_devclass, cx_modevent, NULL);
2582MODULE_VERSION (cx, 1);
2583