if_cx.c revision 298955
1/*-
2 * Cronyx-Sigma adapter driver for FreeBSD.
3 * Supports PPP/HDLC and Cisco/HDLC protocol in synchronous mode,
4 * and asynchronous 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 298955 2016-05-03 03:41:25Z pfg $");
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 <net/if_var.h>
54#include <machine/cpufunc.h>
55#include <machine/cserial.h>
56#include <machine/resource.h>
57#include <dev/cx/machdep.h>
58#include <dev/cx/cxddk.h>
59#include <dev/cx/cronyxfw.h>
60#include "opt_ng_cronyx.h"
61#ifdef NETGRAPH_CRONYX
62#   include "opt_netgraph.h"
63#   include <netgraph/ng_message.h>
64#   include <netgraph/netgraph.h>
65#   include <dev/cx/ng_cx.h>
66#else
67#   include <net/if_types.h>
68#   include <net/if_sppp.h>
69#   define PP_CISCO IFF_LINK2
70#   include <net/bpf.h>
71#endif
72
73#define NCX	1
74
75/* If we don't have Cronyx's sppp version, we don't have fr support via sppp */
76#ifndef PP_FR
77#define PP_FR 0
78#endif
79
80#define CX_DEBUG(d,s)	({if (d->chan->debug) {\
81				printf ("%s: ", d->name); printf s;}})
82#define CX_DEBUG2(d,s)	({if (d->chan->debug>1) {\
83				printf ("%s: ", d->name); printf s;}})
84
85#define CX_LOCK_NAME	"cxX"
86
87#define CX_LOCK(_bd)		mtx_lock (&(_bd)->cx_mtx)
88#define CX_UNLOCK(_bd)		mtx_unlock (&(_bd)->cx_mtx)
89#define CX_LOCK_ASSERT(_bd)	mtx_assert (&(_bd)->cx_mtx, MA_OWNED)
90
91typedef struct _async_q {
92	int beg;
93	int end;
94	#define BF_SZ 14400
95	int buf[BF_SZ+1];
96} async_q;
97
98#define AQ_GSZ(q)	((BF_SZ + (q)->end - (q)->beg)%BF_SZ)
99#define AQ_PUSH(q,c)	{*((q)->buf + (q)->end) = c;\
100			(q)->end = ((q)->end + 1)%BF_SZ;}
101#define AQ_POP(q,c)	{c = *((q)->buf + (q)->beg);\
102			(q)->beg = ((q)->beg + 1)%BF_SZ;}
103
104static void cx_identify		__P((driver_t *, device_t));
105static int cx_probe		__P((device_t));
106static int cx_attach		__P((device_t));
107static int cx_detach		__P((device_t));
108static t_open_t			cx_topen;
109static t_modem_t		cx_tmodem;
110static t_close_t		cx_tclose;
111
112static device_method_t cx_isa_methods [] = {
113	DEVMETHOD(device_identify,	cx_identify),
114	DEVMETHOD(device_probe,		cx_probe),
115	DEVMETHOD(device_attach,	cx_attach),
116	DEVMETHOD(device_detach,	cx_detach),
117
118	DEVMETHOD_END
119};
120
121typedef struct _cx_dma_mem_t {
122	unsigned long	phys;
123	void		*virt;
124	size_t		size;
125	bus_dma_tag_t	dmat;
126	bus_dmamap_t	mapp;
127} cx_dma_mem_t;
128
129typedef struct _drv_t {
130	char name [8];
131	cx_chan_t *chan;
132	cx_board_t *board;
133	cx_dma_mem_t dmamem;
134	struct tty *tty;
135	struct callout dcd_timeout_handle;
136	unsigned callout;
137	unsigned lock;
138	int open_dev;
139	int cd;
140	int running;
141#ifdef NETGRAPH
142	char	nodename [NG_NODESIZ];
143	hook_p	hook;
144	hook_p	debug_hook;
145	node_p	node;
146	struct	ifqueue lo_queue;
147	struct	ifqueue hi_queue;
148#else
149	struct	ifqueue queue;
150	struct	ifnet *ifp;
151#endif
152	short	timeout;
153	struct	callout timeout_handle;
154	struct	cdev *devt;
155	async_q	aqueue;
156#define CX_READ 1
157#define CX_WRITE 2
158	int intr_action;
159	short atimeout;
160} drv_t;
161
162typedef struct _bdrv_t {
163	cx_board_t	*board;
164	struct resource	*base_res;
165	struct resource	*drq_res;
166	struct resource	*irq_res;
167	int		base_rid;
168	int		drq_rid;
169	int		irq_rid;
170	void		*intrhand;
171	drv_t		channel [NCHAN];
172	struct mtx	cx_mtx;
173} bdrv_t;
174
175static driver_t cx_isa_driver = {
176	"cx",
177	cx_isa_methods,
178	sizeof (bdrv_t),
179};
180
181static devclass_t cx_devclass;
182
183extern long csigma_fw_len;
184extern const char *csigma_fw_version;
185extern const char *csigma_fw_date;
186extern const char *csigma_fw_copyright;
187extern const cr_dat_tst_t csigma_fw_tvec[];
188extern const u_char csigma_fw_data[];
189static void cx_oproc (struct tty *tp);
190static int cx_param (struct tty *tp, struct termios *t);
191static void cx_stop (struct tty *tp, int flag);
192static void cx_receive (cx_chan_t *c, char *data, int len);
193static void cx_transmit (cx_chan_t *c, void *attachment, int len);
194static void cx_error (cx_chan_t *c, int data);
195static void cx_modem (cx_chan_t *c);
196static void cx_up (drv_t *d);
197static void cx_start (drv_t *d);
198static void cx_softintr (void *);
199static void *cx_fast_ih;
200static void cx_down (drv_t *d);
201static void cx_watchdog (drv_t *d);
202static void cx_watchdog_timer (void *arg);
203static void cx_carrier (void *arg);
204
205#ifdef NETGRAPH
206extern struct ng_type typestruct;
207#else
208static void cx_ifstart (struct ifnet *ifp);
209static void cx_tlf (struct sppp *sp);
210static void cx_tls (struct sppp *sp);
211static int cx_sioctl (struct ifnet *ifp, u_long cmd, caddr_t data);
212static void cx_initialize (void *softc);
213#endif
214
215static cx_board_t *adapter [NCX];
216static drv_t *channel [NCX*NCHAN];
217static struct callout led_timo [NCX];
218static struct callout timeout_handle;
219
220static int cx_open (struct cdev *dev, int flag, int mode, struct thread *td);
221static int cx_close (struct cdev *dev, int flag, int mode, struct thread *td);
222static int cx_ioctl (struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td);
223static struct cdevsw cx_cdevsw = {
224	.d_version  = D_VERSION,
225	.d_open     = cx_open,
226	.d_close    = cx_close,
227	.d_ioctl    = cx_ioctl,
228	.d_name     = "cx",
229	.d_flags    = D_TTY,
230};
231
232static int MY_SOFT_INTR;
233
234/*
235 * Make an mbuf from data.
236 */
237static struct mbuf *makembuf (void *buf, u_int len)
238{
239	struct mbuf *m, *o, *p;
240
241	MGETHDR (m, M_NOWAIT, MT_DATA);
242
243	if (! m)
244		return 0;
245
246	if (len >= MINCLSIZE)
247		MCLGET (m, M_NOWAIT);
248
249	m->m_pkthdr.len = len;
250	m->m_len = 0;
251
252	p = m;
253	while (len) {
254		u_int n = M_TRAILINGSPACE (p);
255		if (n > len)
256			n = len;
257		if (! n) {
258			/* Allocate new mbuf. */
259			o = p;
260			MGET (p, M_NOWAIT, MT_DATA);
261			if (! p) {
262				m_freem (m);
263				return 0;
264			}
265			if (len >= MINCLSIZE)
266				MCLGET (p, M_NOWAIT);
267			p->m_len = 0;
268			o->m_next = p;
269
270			n = M_TRAILINGSPACE (p);
271			if (n > len)
272				n = len;
273		}
274		bcopy (buf, mtod (p, caddr_t) + p->m_len, n);
275
276		p->m_len += n;
277		buf = n + (char*) buf;
278		len -= n;
279	}
280	return m;
281}
282
283/*
284 * Recover after lost transmit interrupts.
285 */
286static void cx_timeout (void *arg)
287{
288	drv_t *d;
289	int s, i, k;
290
291	for (i = 0; i < NCX; i++) {
292		if (adapter[i] == NULL)
293			continue;
294		for (k = 0; k < NCHAN; ++k) {
295			d = channel[i * NCHAN + k];
296			if (! d)
297				continue;
298			s = splhigh ();
299			CX_LOCK ((bdrv_t *)d->board->sys);
300			if (d->atimeout == 1 && d->tty && d->tty->t_state & TS_BUSY) {
301				d->tty->t_state &= ~TS_BUSY;
302				if (d->tty->t_dev) {
303					d->intr_action |= CX_WRITE;
304					MY_SOFT_INTR = 1;
305					swi_sched (cx_fast_ih, 0);
306				}
307				CX_DEBUG (d, ("cx_timeout\n"));
308			}
309			if (d->atimeout)
310				d->atimeout--;
311			CX_UNLOCK ((bdrv_t *)d->board->sys);
312			splx (s);
313		}
314	}
315	callout_reset (&timeout_handle, hz*5, cx_timeout, 0);
316}
317
318static void cx_led_off (void *arg)
319{
320	cx_board_t *b = arg;
321	bdrv_t *bd = b->sys;
322	int s;
323
324	s = splhigh ();
325	CX_LOCK (bd);
326	cx_led (b, 0);
327	CX_UNLOCK (bd);
328	splx (s);
329}
330
331/*
332 * Activate interrupt handler from DDK.
333 */
334static void cx_intr (void *arg)
335{
336	bdrv_t *bd = arg;
337	cx_board_t *b = bd->board;
338#ifndef NETGRAPH
339	int i;
340#endif
341	int s = splhigh ();
342
343	CX_LOCK (bd);
344	/* Turn LED on. */
345	cx_led (b, 1);
346
347	cx_int_handler (b);
348
349	/* Turn LED off 50 msec later. */
350	callout_reset (&led_timo[b->num], hz/20, cx_led_off, b);
351	CX_UNLOCK (bd);
352	splx (s);
353
354#ifndef NETGRAPH
355	/* Pass packets in a lock-free state */
356	for (i = 0; i < NCHAN && b->chan[i].type; i++) {
357		drv_t *d = b->chan[i].sys;
358		struct mbuf *m;
359		if (!d || !d->running)
360			continue;
361		while (_IF_QLEN(&d->queue)) {
362			IF_DEQUEUE (&d->queue,m);
363			if (!m)
364				continue;
365			sppp_input (d->ifp, m);
366		}
367	}
368#endif
369}
370
371static int probe_irq (cx_board_t *b, int irq)
372{
373	int mask, busy, cnt;
374
375	/* Clear pending irq, if any. */
376	cx_probe_irq (b, -irq);
377	DELAY (100);
378	for (cnt=0; cnt<5; ++cnt) {
379		/* Get the mask of pending irqs, assuming they are busy.
380		 * Activate the adapter on given irq. */
381		busy = cx_probe_irq (b, irq);
382		DELAY (100);
383
384		/* Get the mask of active irqs.
385		 * Deactivate our irq. */
386		mask = cx_probe_irq (b, -irq);
387		DELAY (100);
388		if ((mask & ~busy) == 1 << irq) {
389			cx_probe_irq (b, 0);
390			/* printf ("cx%d: irq %d ok, mask=0x%04x, busy=0x%04x\n",
391				b->num, irq, mask, busy); */
392			return 1;
393		}
394	}
395	/* printf ("cx%d: irq %d not functional, mask=0x%04x, busy=0x%04x\n",
396		b->num, irq, mask, busy); */
397	cx_probe_irq (b, 0);
398	return 0;
399}
400
401static short porttab [] = {
402	0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0,
403	0x300, 0x320, 0x340, 0x360, 0x380, 0x3a0, 0x3c0, 0x3e0, 0
404};
405static char dmatab [] = { 7, 6, 5, 0 };
406static char irqtab [] = { 5, 10, 11, 7, 3, 15, 12, 0 };
407
408static int cx_is_free_res (device_t dev, int rid, int type, rman_res_t start,
409	rman_res_t end, rman_res_t count)
410{
411	struct resource *res;
412
413	if (!(res = bus_alloc_resource (dev, type, &rid, start, end, count, 0)))
414		return 0;
415
416	bus_release_resource (dev, type, rid, res);
417
418	return 1;
419}
420
421static void cx_identify (driver_t *driver, device_t dev)
422{
423	rman_res_t iobase, rescount;
424	int devcount;
425	device_t *devices;
426	device_t child;
427	devclass_t my_devclass;
428	int i, k;
429
430	if ((my_devclass = devclass_find ("cx")) == NULL)
431		return;
432
433	devclass_get_devices (my_devclass, &devices, &devcount);
434
435	if (devcount == 0) {
436		/* We should find all devices by our self. We could alter other
437		 * devices, but we don't have a choise
438		 */
439		for (i = 0; (iobase = porttab [i]) != 0; i++) {
440			if (!cx_is_free_res (dev, 0, SYS_RES_IOPORT,
441			    iobase, iobase + NPORT, NPORT))
442				continue;
443			if (cx_probe_board (iobase, -1, -1) == 0)
444				continue;
445
446			devcount++;
447
448			child = BUS_ADD_CHILD (dev, ISA_ORDER_SPECULATIVE, "cx",
449			    -1);
450
451			if (child == NULL)
452				return;
453
454			device_set_desc_copy (child, "Cronyx Sigma");
455			device_set_driver (child, driver);
456			bus_set_resource (child, SYS_RES_IOPORT, 0,
457			    iobase, NPORT);
458
459			if (devcount >= NCX)
460				break;
461		}
462	} else {
463		static short porttab [] = {
464			0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0,
465			0x300, 0x320, 0x340, 0x360, 0x380, 0x3a0, 0x3c0, 0x3e0, 0
466		};
467		/* Lets check user choise.
468		 */
469		for (k = 0; k < devcount; k++) {
470			if (bus_get_resource (devices[k], SYS_RES_IOPORT, 0,
471			    &iobase, &rescount) != 0)
472				continue;
473
474			for (i = 0; porttab [i] != 0; i++) {
475				if (porttab [i] != iobase)
476					continue;
477				if (!cx_is_free_res (devices[k], 0, SYS_RES_IOPORT,
478				    iobase, iobase + NPORT, NPORT))
479					continue;
480				if (cx_probe_board (iobase, -1, -1) == 0)
481					continue;
482				porttab [i] = -1;
483				device_set_desc_copy (devices[k], "Cronyx Sigma");
484				break;
485			}
486
487			if (porttab [i] == 0) {
488				device_delete_child (
489				    device_get_parent (devices[k]),
490				    devices [k]);
491				devices[k] = 0;
492				continue;
493			}
494		}
495		for (k = 0; k < devcount; k++) {
496			if (devices[k] == 0)
497				continue;
498			if (bus_get_resource (devices[k], SYS_RES_IOPORT, 0,
499			    &iobase, &rescount) == 0)
500				continue;
501			for (i = 0; (iobase = porttab [i]) != 0; i++) {
502				if (porttab [i] == -1) {
503					continue;
504				}
505				if (!cx_is_free_res (devices[k], 0, SYS_RES_IOPORT,
506				    iobase, iobase + NPORT, NPORT))
507					continue;
508				if (cx_probe_board (iobase, -1, -1) == 0)
509					continue;
510
511				bus_set_resource (devices[k], SYS_RES_IOPORT, 0,
512				    iobase, NPORT);
513				porttab [i] = -1;
514				device_set_desc_copy (devices[k], "Cronyx Sigma");
515				break;
516			}
517			if (porttab [i] == 0) {
518				device_delete_child (
519				    device_get_parent (devices[k]),
520				    devices [k]);
521			}
522		}
523		free (devices, M_TEMP);
524	}
525
526	return;
527}
528
529static int cx_probe (device_t dev)
530{
531	int unit = device_get_unit (dev);
532	int i;
533	rman_res_t iobase, rescount;
534
535	if (!device_get_desc (dev) ||
536	    strcmp (device_get_desc (dev), "Cronyx Sigma"))
537		return ENXIO;
538
539	if (bus_get_resource (dev, SYS_RES_IOPORT, 0, &iobase, &rescount) != 0) {
540		printf ("cx%d: Couldn't get IOPORT\n", unit);
541		return ENXIO;
542	}
543
544	if (!cx_is_free_res (dev, 0, SYS_RES_IOPORT,
545	    iobase, iobase + NPORT, NPORT)) {
546		printf ("cx%d: Resource IOPORT isn't free %lx\n", unit, iobase);
547		return ENXIO;
548	}
549
550	for (i = 0; porttab [i] != 0; i++) {
551		if (porttab [i] == iobase) {
552			porttab [i] = -1;
553			break;
554		}
555	}
556
557	if (porttab [i] == 0) {
558		return ENXIO;
559	}
560
561	if (!cx_probe_board (iobase, -1, -1)) {
562		printf ("cx%d: probing for Sigma at %lx faild\n", unit, iobase);
563		return ENXIO;
564	}
565
566	return 0;
567}
568
569static void
570cx_bus_dmamap_addr (void *arg, bus_dma_segment_t *segs, int nseg, int error)
571{
572	unsigned long *addr;
573
574	if (error)
575		return;
576
577	KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
578	addr = arg;
579	*addr = segs->ds_addr;
580}
581
582static int
583cx_bus_dma_mem_alloc (int bnum, int cnum, cx_dma_mem_t *dmem)
584{
585	int error;
586
587	error = bus_dma_tag_create (NULL, 16, 0, BUS_SPACE_MAXADDR_24BIT,
588		BUS_SPACE_MAXADDR, NULL, NULL, dmem->size, 1,
589		dmem->size, 0, NULL, NULL, &dmem->dmat);
590	if (error) {
591		if (cnum >= 0)	printf ("cx%d-%d: ", bnum, cnum);
592		else		printf ("cx%d: ", bnum);
593		printf ("couldn't allocate tag for dma memory\n");
594 		return 0;
595	}
596	error = bus_dmamem_alloc (dmem->dmat, (void **)&dmem->virt,
597		BUS_DMA_NOWAIT | BUS_DMA_ZERO, &dmem->mapp);
598	if (error) {
599		if (cnum >= 0)	printf ("cx%d-%d: ", bnum, cnum);
600		else		printf ("cx%d: ", bnum);
601		printf ("couldn't allocate mem for dma memory\n");
602		bus_dma_tag_destroy (dmem->dmat);
603 		return 0;
604	}
605	error = bus_dmamap_load (dmem->dmat, dmem->mapp, dmem->virt,
606		dmem->size, cx_bus_dmamap_addr, &dmem->phys, 0);
607	if (error) {
608		if (cnum >= 0)	printf ("cx%d-%d: ", bnum, cnum);
609		else		printf ("cx%d: ", bnum);
610		printf ("couldn't load mem map for dma memory\n");
611		bus_dmamem_free (dmem->dmat, dmem->virt, dmem->mapp);
612		bus_dma_tag_destroy (dmem->dmat);
613 		return 0;
614	}
615	return 1;
616}
617
618static void
619cx_bus_dma_mem_free (cx_dma_mem_t *dmem)
620{
621	bus_dmamap_unload (dmem->dmat, dmem->mapp);
622	bus_dmamem_free (dmem->dmat, dmem->virt, dmem->mapp);
623	bus_dma_tag_destroy (dmem->dmat);
624}
625
626/*
627 * The adapter is present, initialize the driver structures.
628 */
629static int cx_attach (device_t dev)
630{
631	bdrv_t *bd = device_get_softc (dev);
632	rman_res_t iobase, drq, irq, rescount;
633	int unit = device_get_unit (dev);
634	char *cx_ln = CX_LOCK_NAME;
635	cx_board_t *b;
636	cx_chan_t *c;
637	drv_t *d;
638	int i;
639	int s;
640
641	KASSERT ((bd != NULL), ("cx%d: NULL device softc\n", unit));
642
643	bus_get_resource (dev, SYS_RES_IOPORT, 0, &iobase, &rescount);
644	bd->base_rid = 0;
645	bd->base_res = bus_alloc_resource (dev, SYS_RES_IOPORT, &bd->base_rid,
646		iobase, iobase + NPORT, NPORT, RF_ACTIVE);
647	if (! bd->base_res) {
648		printf ("cx%d: cannot allocate base address\n", unit);
649		return ENXIO;
650	}
651
652	if (bus_get_resource (dev, SYS_RES_DRQ, 0, &drq, &rescount) != 0) {
653		for (i = 0; (drq = dmatab [i]) != 0; i++) {
654			if (!cx_is_free_res (dev, 0, SYS_RES_DRQ,
655			    drq, drq + 1, 1))
656				continue;
657			bus_set_resource (dev, SYS_RES_DRQ, 0, drq, 1);
658			break;
659		}
660
661		if (dmatab[i] == 0) {
662			bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
663				bd->base_res);
664			printf ("cx%d: Couldn't get DRQ\n", unit);
665			return ENXIO;
666		}
667	}
668
669	bd->drq_rid = 0;
670	bd->drq_res = bus_alloc_resource (dev, SYS_RES_DRQ, &bd->drq_rid,
671		drq, drq + 1, 1, RF_ACTIVE);
672	if (! bd->drq_res) {
673		printf ("cx%d: cannot allocate drq\n", unit);
674		bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
675			bd->base_res);
676		return ENXIO;
677	}
678
679	if (bus_get_resource (dev, SYS_RES_IRQ, 0, &irq, &rescount) != 0) {
680		for (i = 0; (irq = irqtab [i]) != 0; i++) {
681			if (!cx_is_free_res (dev, 0, SYS_RES_IRQ,
682			    irq, irq + 1, 1))
683				continue;
684			bus_set_resource (dev, SYS_RES_IRQ, 0, irq, 1);
685			break;
686		}
687
688		if (irqtab[i] == 0) {
689			bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid,
690				bd->drq_res);
691			bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
692				bd->base_res);
693			printf ("cx%d: Couldn't get IRQ\n", unit);
694			return ENXIO;
695		}
696	}
697
698	bd->irq_rid = 0;
699	bd->irq_res = bus_alloc_resource (dev, SYS_RES_IRQ, &bd->irq_rid,
700		irq, irq + 1, 1, RF_ACTIVE);
701	if (! bd->irq_res) {
702		printf ("cx%d: Couldn't allocate irq\n", unit);
703		bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid,
704			bd->drq_res);
705		bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
706			bd->base_res);
707		return ENXIO;
708	}
709
710	b = malloc (sizeof (cx_board_t), M_DEVBUF, M_WAITOK);
711	if (!b) {
712		printf ("cx:%d: Couldn't allocate memory\n", unit);
713		return (ENXIO);
714	}
715	adapter[unit] = b;
716	bzero (b, sizeof(cx_board_t));
717
718	if (! cx_open_board (b, unit, iobase, irq, drq)) {
719		printf ("cx%d: error loading firmware\n", unit);
720		free (b, M_DEVBUF);
721		bus_release_resource (dev, SYS_RES_IRQ, bd->irq_rid,
722			bd->irq_res);
723		bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid,
724			bd->drq_res);
725		bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
726			bd->base_res);
727 		return ENXIO;
728	}
729
730	bd->board = b;
731
732	cx_ln[2] = '0' + unit;
733	mtx_init (&bd->cx_mtx, cx_ln, MTX_NETWORK_LOCK, MTX_DEF|MTX_RECURSE);
734	if (! probe_irq (b, irq)) {
735		printf ("cx%d: irq %ld not functional\n", unit, irq);
736		bd->board = 0;
737		adapter [unit] = 0;
738		mtx_destroy (&bd->cx_mtx);
739		free (b, M_DEVBUF);
740		bus_release_resource (dev, SYS_RES_IRQ, bd->irq_rid,
741			bd->irq_res);
742		bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid,
743			bd->drq_res);
744		bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
745			bd->base_res);
746 		return ENXIO;
747	}
748	b->sys = bd;
749	callout_init (&led_timo[b->num], 1);
750	s = splhigh ();
751	if (bus_setup_intr (dev, bd->irq_res,
752			   INTR_TYPE_NET|INTR_MPSAFE,
753			   NULL, cx_intr, bd, &bd->intrhand)) {
754		printf ("cx%d: Can't setup irq %ld\n", unit, irq);
755		bd->board = 0;
756		b->sys = 0;
757		adapter [unit] = 0;
758		mtx_destroy (&bd->cx_mtx);
759		free (b, M_DEVBUF);
760		bus_release_resource (dev, SYS_RES_IRQ, bd->irq_rid,
761			bd->irq_res);
762		bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid,
763			bd->drq_res);
764		bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid,
765			bd->base_res);
766		splx (s);
767 		return ENXIO;
768	}
769
770	CX_LOCK (bd);
771	cx_init (b, b->num, b->port, irq, drq);
772	cx_setup_board (b, 0, 0, 0);
773	CX_UNLOCK (bd);
774
775	printf ("cx%d: <Cronyx-Sigma-%s>\n", b->num, b->name);
776
777	for (c=b->chan; c<b->chan+NCHAN; ++c) {
778		if (c->type == T_NONE)
779			continue;
780		d = &bd->channel[c->num];
781		d->dmamem.size = sizeof(cx_buf_t);
782		if (! cx_bus_dma_mem_alloc (unit, c->num, &d->dmamem))
783			continue;
784		d->board = b;
785		d->chan = c;
786		d->open_dev = 0;
787		c->sys = d;
788		channel [b->num*NCHAN + c->num] = d;
789		sprintf (d->name, "cx%d.%d", b->num, c->num);
790
791		switch (c->type) {
792		case T_SYNC_RS232:
793		case T_SYNC_V35:
794		case T_SYNC_RS449:
795		case T_UNIV:
796		case T_UNIV_RS232:
797		case T_UNIV_RS449:
798		case T_UNIV_V35:
799		callout_init (&d->timeout_handle, 1);
800#ifdef NETGRAPH
801		if (ng_make_node_common (&typestruct, &d->node) != 0) {
802			printf ("%s: cannot make common node\n", d->name);
803			channel [b->num*NCHAN + c->num] = 0;
804			c->sys = 0;
805			cx_bus_dma_mem_free (&d->dmamem);
806			continue;
807		}
808		NG_NODE_SET_PRIVATE (d->node, d);
809		sprintf (d->nodename, "%s%d", NG_CX_NODE_TYPE,
810			 c->board->num*NCHAN + c->num);
811		if (ng_name_node (d->node, d->nodename)) {
812			printf ("%s: cannot name node\n", d->nodename);
813			NG_NODE_UNREF (d->node);
814			channel [b->num*NCHAN + c->num] = 0;
815			c->sys = 0;
816			cx_bus_dma_mem_free (&d->dmamem);
817			continue;
818		}
819		d->lo_queue.ifq_maxlen = ifqmaxlen;
820		d->hi_queue.ifq_maxlen = ifqmaxlen;
821		mtx_init (&d->lo_queue.ifq_mtx, "cx_queue_lo", NULL, MTX_DEF);
822		mtx_init (&d->hi_queue.ifq_mtx, "cx_queue_hi", NULL, MTX_DEF);
823#else /*NETGRAPH*/
824		d->ifp = if_alloc(IFT_PPP);
825		if (d->ifp == NULL) {
826			printf ("%s: cannot if_alloc() common interface\n",
827			    d->name);
828			channel [b->num*NCHAN + c->num] = 0;
829			c->sys = 0;
830			cx_bus_dma_mem_free (&d->dmamem);
831			continue;
832		}
833		d->ifp->if_softc	= d;
834		if_initname (d->ifp, "cx", b->num * NCHAN + c->num);
835		d->ifp->if_mtu		= PP_MTU;
836		d->ifp->if_flags	= IFF_POINTOPOINT | IFF_MULTICAST;
837		d->ifp->if_ioctl	= cx_sioctl;
838		d->ifp->if_start	= cx_ifstart;
839		d->ifp->if_init		= cx_initialize;
840		d->queue.ifq_maxlen	= 2;
841		mtx_init (&d->queue.ifq_mtx, "cx_queue", NULL, MTX_DEF);
842		sppp_attach (d->ifp);
843		if_attach (d->ifp);
844		IFP2SP(d->ifp)->pp_tlf	= cx_tlf;
845		IFP2SP(d->ifp)->pp_tls	= cx_tls;
846		/* If BPF is in the kernel, call the attach for it.
847		 * Size of PPP header is 4 bytes. */
848		bpfattach (d->ifp, DLT_PPP, 4);
849#endif /*NETGRAPH*/
850		}
851		d->tty = ttyalloc ();
852		d->tty->t_open	= cx_topen;
853		d->tty->t_close	= cx_tclose;
854		d->tty->t_param	= cx_param;
855		d->tty->t_stop	= cx_stop;
856		d->tty->t_modem	= cx_tmodem;
857		d->tty->t_oproc	= cx_oproc;
858		d->tty->t_sc	= d;
859		CX_LOCK (bd);
860		cx_start_chan (c, d->dmamem.virt, d->dmamem.phys);
861		cx_register_receive (c, &cx_receive);
862		cx_register_transmit (c, &cx_transmit);
863		cx_register_error (c, &cx_error);
864		cx_register_modem (c, &cx_modem);
865		CX_UNLOCK (bd);
866
867		ttycreate(d->tty, TS_CALLOUT, "x%r%r", b->num, c->num);
868		d->devt = make_dev (&cx_cdevsw, b->num*NCHAN + c->num + 64, UID_ROOT, GID_WHEEL, 0600, "cx%d", b->num*NCHAN + c->num);
869		d->devt->si_drv1 = d;
870		callout_init (&d->dcd_timeout_handle, 1);
871	}
872	splx (s);
873
874	return 0;
875}
876
877static int cx_detach (device_t dev)
878{
879	bdrv_t *bd = device_get_softc (dev);
880	cx_board_t *b = bd->board;
881	cx_chan_t *c;
882	int s;
883
884	KASSERT (mtx_initialized (&bd->cx_mtx), ("cx mutex not initialized"));
885
886	s = splhigh ();
887	CX_LOCK (bd);
888	/* Check if the device is busy (open). */
889	for (c = b->chan; c < b->chan + NCHAN; ++c) {
890		drv_t *d = (drv_t*) c->sys;
891
892		if (!d || d->chan->type == T_NONE)
893			continue;
894		if (d->lock) {
895			CX_UNLOCK (bd);
896			splx (s);
897			return EBUSY;
898		}
899		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN) &&
900		    (d->open_dev|0x2)) {
901			CX_UNLOCK (bd);
902			splx (s);
903			return EBUSY;
904		}
905		if (d->running) {
906			CX_UNLOCK (bd);
907			splx (s);
908			return EBUSY;
909		}
910	}
911
912	/* Deactivate the timeout routine. And soft interrupt*/
913	callout_stop (&led_timo[b->num]);
914
915	for (c = b->chan; c < b->chan + NCHAN; ++c) {
916		drv_t *d = c->sys;
917
918		if (!d || d->chan->type == T_NONE)
919			continue;
920
921		callout_stop (&d->dcd_timeout_handle);
922	}
923	CX_UNLOCK (bd);
924	bus_teardown_intr (dev, bd->irq_res, bd->intrhand);
925	bus_release_resource (dev, SYS_RES_IRQ, bd->irq_rid, bd->irq_res);
926
927	bus_release_resource (dev, SYS_RES_DRQ, bd->drq_rid, bd->drq_res);
928
929	bus_release_resource (dev, SYS_RES_IOPORT, bd->base_rid, bd->base_res);
930
931	CX_LOCK (bd);
932	cx_close_board (b);
933
934	/* Detach the interfaces, free buffer memory. */
935	for (c = b->chan; c < b->chan + NCHAN; ++c) {
936		drv_t *d = (drv_t*) c->sys;
937
938		if (!d || d->chan->type == T_NONE)
939			continue;
940
941		if (d->tty) {
942			ttyfree (d->tty);
943			d->tty = NULL;
944		}
945
946		callout_stop (&d->timeout_handle);
947#ifdef NETGRAPH
948		if (d->node) {
949			ng_rmnode_self (d->node);
950			NG_NODE_UNREF (d->node);
951			d->node = NULL;
952		}
953		mtx_destroy (&d->lo_queue.ifq_mtx);
954		mtx_destroy (&d->hi_queue.ifq_mtx);
955#else
956		/* Detach from the packet filter list of interfaces. */
957		bpfdetach (d->ifp);
958		/* Detach from the sync PPP list. */
959		sppp_detach (d->ifp);
960
961		if_detach (d->ifp);
962		if_free(d->ifp);
963		/* XXXRIK: check interconnection with irq handler */
964		IF_DRAIN (&d->queue);
965		mtx_destroy (&d->queue.ifq_mtx);
966#endif
967		destroy_dev (d->devt);
968	}
969
970	cx_led_off (b);
971	CX_UNLOCK (bd);
972	callout_drain (&led_timo[b->num]);
973	for (c = b->chan; c < b->chan + NCHAN; ++c) {
974		drv_t *d = c->sys;
975
976		if (!d || d->chan->type == T_NONE)
977			continue;
978
979		callout_drain (&d->dcd_timeout_handle);
980		callout_drain (&d->timeout_handle);
981	}
982	splx (s);
983
984	s = splhigh ();
985	for (c = b->chan; c < b->chan + NCHAN; ++c) {
986		drv_t *d = (drv_t*) c->sys;
987
988		if (!d || d->chan->type == T_NONE)
989			continue;
990
991		/* Deallocate buffers. */
992		cx_bus_dma_mem_free (&d->dmamem);
993	}
994	bd->board = 0;
995	adapter [b->num] = 0;
996	free (b, M_DEVBUF);
997	splx (s);
998
999	mtx_destroy (&bd->cx_mtx);
1000
1001	return 0;
1002}
1003
1004#ifndef NETGRAPH
1005static void cx_ifstart (struct ifnet *ifp)
1006{
1007	drv_t *d = ifp->if_softc;
1008	bdrv_t *bd = d->board->sys;
1009
1010	CX_LOCK (bd);
1011	cx_start (d);
1012	CX_UNLOCK (bd);
1013}
1014
1015static void cx_tlf (struct sppp *sp)
1016{
1017	drv_t *d = SP2IFP(sp)->if_softc;
1018
1019	CX_DEBUG (d, ("cx_tlf\n"));
1020/*	cx_set_dtr (d->chan, 0);*/
1021/*	cx_set_rts (d->chan, 0);*/
1022	if (!(IFP2SP(d->ifp)->pp_flags & PP_FR) && !(d->ifp->if_flags & PP_CISCO))
1023		sp->pp_down (sp);
1024}
1025
1026static void cx_tls (struct sppp *sp)
1027{
1028	drv_t *d = SP2IFP(sp)->if_softc;
1029
1030	CX_DEBUG (d, ("cx_tls\n"));
1031	if (!(IFP2SP(d->ifp)->pp_flags & PP_FR) && !(d->ifp->if_flags & PP_CISCO))
1032		sp->pp_up (sp);
1033}
1034
1035/*
1036 * Initialization of interface.
1037 * It seems to be never called by upper level.
1038 */
1039static void cx_initialize (void *softc)
1040{
1041	drv_t *d = softc;
1042
1043	CX_DEBUG (d, ("cx_initialize\n"));
1044}
1045
1046/*
1047 * Process an ioctl request.
1048 */
1049static int cx_sioctl (struct ifnet *ifp, u_long cmd, caddr_t data)
1050{
1051	drv_t *d = ifp->if_softc;
1052	bdrv_t *bd = d->board->sys;
1053	int error, s, was_up, should_be_up;
1054
1055	/* No socket ioctls while the channel is in async mode. */
1056	if (d->chan->type == T_NONE || d->chan->mode == M_ASYNC)
1057		return EBUSY;
1058
1059	/* Socket ioctls on slave subchannels are not allowed. */
1060	was_up = (ifp->if_drv_flags & IFF_DRV_RUNNING) != 0;
1061	error = sppp_ioctl (ifp, cmd, data);
1062	if (error)
1063		return error;
1064
1065	s = splhigh ();
1066	CX_LOCK (bd);
1067	if (! (ifp->if_flags & IFF_DEBUG))
1068		d->chan->debug = 0;
1069	else
1070		d->chan->debug = d->chan->debug_shadow;
1071	CX_UNLOCK (bd);
1072	splx (s);
1073
1074	switch (cmd) {
1075	default:	   CX_DEBUG2 (d, ("ioctl 0x%lx\n", cmd)); return 0;
1076	case SIOCADDMULTI: CX_DEBUG2 (d, ("SIOCADDMULTI\n"));     return 0;
1077	case SIOCDELMULTI: CX_DEBUG2 (d, ("SIOCDELMULTI\n"));     return 0;
1078	case SIOCSIFFLAGS: CX_DEBUG2 (d, ("SIOCSIFFLAGS\n"));     break;
1079	case SIOCSIFADDR:  CX_DEBUG2 (d, ("SIOCSIFADDR\n"));      break;
1080	}
1081
1082	/* We get here only in case of SIFFLAGS or SIFADDR. */
1083	s = splhigh ();
1084	CX_LOCK (bd);
1085	should_be_up = (ifp->if_drv_flags & IFF_DRV_RUNNING) != 0;
1086	if (!was_up && should_be_up) {
1087		/* Interface goes up -- start it. */
1088		cx_up (d);
1089		cx_start (d);
1090	} else if (was_up && !should_be_up) {
1091		/* Interface is going down -- stop it. */
1092		/* if ((IFP2SP(d->ifp)->pp_flags & PP_FR) || (ifp->if_flags & PP_CISCO))*/
1093		cx_down (d);
1094	}
1095	CX_UNLOCK (bd);
1096	splx (s);
1097	return 0;
1098}
1099#endif /*NETGRAPH*/
1100
1101/*
1102 * Stop the interface.  Called on splimp().
1103 */
1104static void cx_down (drv_t *d)
1105{
1106	int s = splhigh ();
1107	CX_DEBUG (d, ("cx_down\n"));
1108	cx_set_dtr (d->chan, 0);
1109	cx_set_rts (d->chan, 0);
1110	d->running = 0;
1111	callout_stop (&d->timeout_handle);
1112	splx (s);
1113}
1114
1115/*
1116 * Start the interface.  Called on splimp().
1117 */
1118static void cx_up (drv_t *d)
1119{
1120	int s = splhigh ();
1121	CX_DEBUG (d, ("cx_up\n"));
1122	cx_set_dtr (d->chan, 1);
1123	cx_set_rts (d->chan, 1);
1124	d->running = 1;
1125	splx (s);
1126}
1127
1128/*
1129 * Start output on the (slave) interface.  Get another datagram to send
1130 * off of the interface queue, and copy it to the interface
1131 * before starting the output.
1132 */
1133static void cx_send (drv_t *d)
1134{
1135	struct mbuf *m;
1136	u_short len;
1137
1138	CX_DEBUG2 (d, ("cx_send\n"));
1139
1140	/* No output if the interface is down. */
1141	if (! d->running)
1142		return;
1143
1144	/* No output if the modem is off. */
1145	if (! cx_get_dsr (d->chan) && ! cx_get_loop(d->chan))
1146		return;
1147
1148	if (cx_buf_free (d->chan)) {
1149		/* Get the packet to send. */
1150#ifdef NETGRAPH
1151		IF_DEQUEUE (&d->hi_queue, m);
1152		if (! m)
1153			IF_DEQUEUE (&d->lo_queue, m);
1154#else
1155		m = sppp_dequeue (d->ifp);
1156#endif
1157		if (! m)
1158			return;
1159#ifndef NETGRAPH
1160		BPF_MTAP (d->ifp, m);
1161#endif
1162		len = m_length (m, NULL);
1163		if (! m->m_next)
1164			cx_send_packet (d->chan, (u_char*)mtod (m, caddr_t),
1165				len, 0);
1166		else {
1167			u_char buf [DMABUFSZ];
1168			m_copydata (m, 0, len, buf);
1169			cx_send_packet (d->chan, buf, len, 0);
1170		}
1171		m_freem (m);
1172
1173		/* Set up transmit timeout, 10 seconds. */
1174		d->timeout = 10;
1175	}
1176#ifndef NETGRAPH
1177	d->ifp->if_drv_flags |= IFF_DRV_OACTIVE;
1178#endif
1179}
1180
1181/*
1182 * Start output on the interface.
1183 * Always called on splimp().
1184 */
1185static void cx_start (drv_t *d)
1186{
1187	int s = splhigh ();
1188	if (d->running) {
1189		if (! d->chan->dtr)
1190			cx_set_dtr (d->chan, 1);
1191		if (! d->chan->rts)
1192			cx_set_rts (d->chan, 1);
1193		cx_send (d);
1194		callout_reset (&d->timeout_handle, hz, cx_watchdog_timer, d);
1195	}
1196	splx (s);
1197}
1198
1199/*
1200 * Handle transmit timeouts.
1201 * Recover after lost transmit interrupts.
1202 * Always called on splimp().
1203 */
1204static void cx_watchdog (drv_t *d)
1205{
1206
1207	CX_DEBUG (d, ("device timeout\n"));
1208	if (d->running) {
1209		cx_setup_chan (d->chan);
1210		cx_start_chan (d->chan, 0, 0);
1211		cx_set_dtr (d->chan, 1);
1212		cx_set_rts (d->chan, 1);
1213		cx_start (d);
1214	}
1215}
1216
1217static void cx_watchdog_timer (void *arg)
1218{
1219	drv_t *d = arg;
1220	bdrv_t *bd = d->board->sys;
1221
1222	CX_LOCK (bd);
1223	if (d->timeout == 1)
1224		cx_watchdog (d);
1225	if (d->timeout)
1226		d->timeout--;
1227	callout_reset (&d->timeout_handle, hz, cx_watchdog_timer, d);
1228	CX_UNLOCK (bd);
1229}
1230
1231/*
1232 * Transmit callback function.
1233 */
1234static void cx_transmit (cx_chan_t *c, void *attachment, int len)
1235{
1236	drv_t *d = c->sys;
1237
1238	if (!d)
1239		return;
1240
1241	if (c->mode == M_ASYNC && d->tty) {
1242		d->tty->t_state &= ~(TS_BUSY | TS_FLUSH);
1243		d->atimeout = 0;
1244		if (d->tty->t_dev) {
1245			d->intr_action |= CX_WRITE;
1246			MY_SOFT_INTR = 1;
1247			swi_sched (cx_fast_ih, 0);
1248		}
1249		return;
1250	}
1251	d->timeout = 0;
1252#ifndef NETGRAPH
1253	if_inc_counter(d->ifp, IFCOUNTER_OPACKETS, 1);
1254	d->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1255#endif
1256	cx_start (d);
1257}
1258
1259/*
1260 * Process the received packet.
1261 */
1262static void cx_receive (cx_chan_t *c, char *data, int len)
1263{
1264	drv_t *d = c->sys;
1265	struct mbuf *m;
1266	char *cc = data;
1267#ifdef NETGRAPH
1268	int error;
1269#endif
1270
1271	if (!d)
1272		return;
1273
1274	if (c->mode == M_ASYNC && d->tty) {
1275		if (d->tty->t_state & TS_ISOPEN) {
1276			async_q *q = &d->aqueue;
1277			int size = BF_SZ - 1 - AQ_GSZ (q);
1278
1279			if (len <= 0 && !size)
1280				return;
1281
1282			if (len > size) {
1283				c->ierrs++;
1284				cx_error (c, CX_OVERRUN);
1285				len = size - 1;
1286			}
1287
1288			while (len--) {
1289				AQ_PUSH (q, *(unsigned char *)cc);
1290				cc++;
1291			}
1292
1293			d->intr_action |= CX_READ;
1294			MY_SOFT_INTR = 1;
1295			swi_sched (cx_fast_ih, 0);
1296		}
1297		return;
1298	}
1299	if (! d->running)
1300		return;
1301
1302	m = makembuf (data, len);
1303	if (! m) {
1304		CX_DEBUG (d, ("no memory for packet\n"));
1305#ifndef NETGRAPH
1306		if_inc_counter(d->ifp, IFCOUNTER_IQDROPS, 1);
1307#endif
1308		return;
1309	}
1310	if (c->debug > 1)
1311		m_print (m, 0);
1312#ifdef NETGRAPH
1313	m->m_pkthdr.rcvif = 0;
1314	NG_SEND_DATA_ONLY (error, d->hook, m);
1315#else
1316	if_inc_counter(d->ifp, IFCOUNTER_IPACKETS, 1);
1317	m->m_pkthdr.rcvif = d->ifp;
1318	/* Check if there's a BPF listener on this interface.
1319	 * If so, hand off the raw packet to bpf. */
1320	BPF_MTAP(d->ifp, m);
1321	IF_ENQUEUE (&d->queue, m);
1322#endif
1323}
1324
1325#define CONDITION(t,tp) (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON))\
1326	    && (!(tp->t_iflag & BRKINT) || (tp->t_iflag & IGNBRK))\
1327	    && (!(tp->t_iflag & PARMRK)\
1328		|| (tp->t_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))\
1329	    && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN))\
1330	    && linesw[tp->t_line]->l_rint == ttyinput)
1331
1332/*
1333 * Error callback function.
1334 */
1335static void cx_error (cx_chan_t *c, int data)
1336{
1337	drv_t *d = c->sys;
1338	async_q *q;
1339
1340	if (!d)
1341		return;
1342
1343	q = &(d->aqueue);
1344
1345	switch (data) {
1346	case CX_FRAME:
1347		CX_DEBUG (d, ("frame error\n"));
1348		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN)
1349			&& (AQ_GSZ (q) < BF_SZ - 1)
1350			&& (!CONDITION((&d->tty->t_termios), (d->tty))
1351			|| !(d->tty->t_iflag & (IGNPAR | PARMRK)))) {
1352			AQ_PUSH (q, TTY_FE);
1353			d->intr_action |= CX_READ;
1354			MY_SOFT_INTR = 1;
1355			swi_sched (cx_fast_ih, 0);
1356		}
1357#ifndef NETGRAPH
1358		else
1359			if_inc_counter(d->ifp, IFCOUNTER_IERRORS, 1);
1360#endif
1361		break;
1362	case CX_CRC:
1363		CX_DEBUG (d, ("crc error\n"));
1364		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN)
1365			&& (AQ_GSZ (q) < BF_SZ - 1)
1366			&& (!CONDITION((&d->tty->t_termios), (d->tty))
1367			|| !(d->tty->t_iflag & INPCK)
1368			|| !(d->tty->t_iflag & (IGNPAR | PARMRK)))) {
1369			AQ_PUSH (q, TTY_PE);
1370			d->intr_action |= CX_READ;
1371			MY_SOFT_INTR = 1;
1372			swi_sched (cx_fast_ih, 0);
1373		}
1374#ifndef NETGRAPH
1375		else
1376			if_inc_counter(d->ifp, IFCOUNTER_IERRORS, 1);
1377#endif
1378		break;
1379	case CX_OVERRUN:
1380		CX_DEBUG (d, ("overrun error\n"));
1381#ifdef TTY_OE
1382		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN)
1383			&& (AQ_GSZ (q) < BF_SZ - 1)
1384			&& (!CONDITION((&d->tty->t_termios), (d->tty)))) {
1385			AQ_PUSH (q, TTY_OE);
1386			d->intr_action |= CX_READ;
1387			MY_SOFT_INTR = 1;
1388			swi_sched (cx_fast_ih, 0);
1389		}
1390#endif
1391#ifndef NETGRAPH
1392		else {
1393			if_inc_counter(d->ifp, IFCOUNTER_COLLISIONS, 1);
1394			if_inc_counter(d->ifp, IFCOUNTER_IERRORS, 1);
1395		}
1396#endif
1397		break;
1398	case CX_OVERFLOW:
1399		CX_DEBUG (d, ("overflow error\n"));
1400#ifndef NETGRAPH
1401		if (c->mode != M_ASYNC)
1402			if_inc_counter(d->ifp, IFCOUNTER_IERRORS, 1);
1403#endif
1404		break;
1405	case CX_UNDERRUN:
1406		CX_DEBUG (d, ("underrun error\n"));
1407		if (c->mode != M_ASYNC) {
1408			d->timeout = 0;
1409#ifndef NETGRAPH
1410			if_inc_counter(d->ifp, IFCOUNTER_OERRORS, 1);
1411			d->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1412#endif
1413			cx_start (d);
1414		}
1415		break;
1416	case CX_BREAK:
1417		CX_DEBUG (d, ("break error\n"));
1418		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN)
1419			&& (AQ_GSZ (q) < BF_SZ - 1)
1420			&& (!CONDITION((&d->tty->t_termios), (d->tty))
1421			|| !(d->tty->t_iflag & (IGNBRK | BRKINT | PARMRK)))) {
1422			AQ_PUSH (q, TTY_BI);
1423			d->intr_action |= CX_READ;
1424			MY_SOFT_INTR = 1;
1425			swi_sched (cx_fast_ih, 0);
1426		}
1427#ifndef NETGRAPH
1428		else
1429			if_inc_counter(d->ifp, IFCOUNTER_IERRORS, 1);
1430#endif
1431		break;
1432	default:
1433		CX_DEBUG (d, ("error #%d\n", data));
1434	}
1435}
1436
1437static int cx_topen (struct tty *tp, struct cdev *dev)
1438{
1439	bdrv_t *bd;
1440	drv_t *d;
1441
1442	d = tp->t_sc;
1443	CX_DEBUG2 (d, ("cx_open (serial)\n"));
1444
1445	bd = d->board->sys;
1446
1447	if (d->chan->mode != M_ASYNC)
1448		return (EBUSY);
1449
1450	d->open_dev |= 0x2;
1451	CX_LOCK (bd);
1452	cx_start_chan (d->chan, 0, 0);
1453	cx_set_dtr (d->chan, 1);
1454	cx_set_rts (d->chan, 1);
1455	d->cd = cx_get_cd (d->chan);
1456	CX_UNLOCK (bd);
1457
1458	CX_DEBUG2 (d, ("cx_open done\n"));
1459
1460	return 0;
1461}
1462
1463static void cx_tclose (struct tty *tp)
1464{
1465	drv_t *d;
1466	bdrv_t *bd;
1467
1468	d = tp->t_sc;
1469	CX_DEBUG2 (d, ("cx_close\n"));
1470	bd = d->board->sys;
1471	CX_LOCK (bd);
1472	/* Disable receiver.
1473	 * Transmitter continues sending the queued data. */
1474	cx_enable_receive (d->chan, 0);
1475	CX_UNLOCK (bd);
1476	d->open_dev &= ~0x2;
1477}
1478
1479static int cx_tmodem (struct tty *tp, int sigon, int sigoff)
1480{
1481	drv_t *d;
1482	bdrv_t *bd;
1483
1484	d = tp->t_sc;
1485	bd = d->board->sys;
1486
1487	CX_LOCK (bd);
1488	if (!sigon && !sigoff) {
1489		if (cx_get_dsr (d->chan)) sigon |= SER_DSR;
1490		if (cx_get_cd  (d->chan)) sigon |= SER_DCD;
1491		if (cx_get_cts (d->chan)) sigon |= SER_CTS;
1492		if (d->chan->dtr)	  sigon |= SER_DTR;
1493		if (d->chan->rts)	  sigon |= SER_RTS;
1494		CX_UNLOCK (bd);
1495		return sigon;
1496	}
1497
1498	if (sigon & SER_DTR)
1499		cx_set_dtr (d->chan, 1);
1500	if (sigoff & SER_DTR)
1501		cx_set_dtr (d->chan, 0);
1502	if (sigon & SER_RTS)
1503		cx_set_rts (d->chan, 1);
1504	if (sigoff & SER_RTS)
1505		cx_set_rts (d->chan, 0);
1506	CX_UNLOCK (bd);
1507
1508	return (0);
1509}
1510
1511static int cx_open (struct cdev *dev, int flag, int mode, struct thread *td)
1512{
1513	int unit;
1514	drv_t *d;
1515
1516	d = dev->si_drv1;
1517	unit = d->chan->num;
1518
1519	CX_DEBUG2 (d, ("cx_open unit=%d, flag=0x%x, mode=0x%x\n",
1520		    unit, flag, mode));
1521
1522	d->open_dev |= 0x1;
1523
1524	CX_DEBUG2 (d, ("cx_open done\n"));
1525
1526	return 0;
1527}
1528
1529static int cx_close (struct cdev *dev, int flag, int mode, struct thread *td)
1530{
1531	drv_t *d;
1532
1533	d = dev->si_drv1;
1534	CX_DEBUG2 (d, ("cx_close\n"));
1535	d->open_dev &= ~0x1;
1536	return 0;
1537}
1538
1539static int cx_modem_status (drv_t *d)
1540{
1541	bdrv_t *bd = d->board->sys;
1542	int status = 0, s = splhigh ();
1543	CX_LOCK (bd);
1544	/* Already opened by someone or network interface is up? */
1545	if ((d->chan->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN) &&
1546	    (d->open_dev|0x2)) || (d->chan->mode != M_ASYNC && d->running))
1547		status = TIOCM_LE;	/* always enabled while open */
1548
1549	if (cx_get_dsr (d->chan)) status |= TIOCM_DSR;
1550	if (cx_get_cd  (d->chan)) status |= TIOCM_CD;
1551	if (cx_get_cts (d->chan)) status |= TIOCM_CTS;
1552	if (d->chan->dtr)	  status |= TIOCM_DTR;
1553	if (d->chan->rts)	  status |= TIOCM_RTS;
1554	CX_UNLOCK (bd);
1555	splx (s);
1556	return status;
1557}
1558
1559static int cx_ioctl (struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1560{
1561	drv_t *d;
1562	bdrv_t *bd;
1563	cx_chan_t *c;
1564	struct serial_statistics *st;
1565	int error, s;
1566	char mask[16];
1567
1568	d = dev->si_drv1;
1569	c = d->chan;
1570
1571	bd = d->board->sys;
1572
1573	switch (cmd) {
1574	case SERIAL_GETREGISTERED:
1575		CX_DEBUG2 (d, ("ioctl: getregistered\n"));
1576		bzero (mask, sizeof(mask));
1577		for (s=0; s<NCX*NCHAN; ++s)
1578			if (channel [s])
1579				mask [s/8] |= 1 << (s & 7);
1580		bcopy (mask, data, sizeof (mask));
1581		return 0;
1582
1583	case SERIAL_GETPORT:
1584		CX_DEBUG2 (d, ("ioctl: getport\n"));
1585		s = splhigh ();
1586		CX_LOCK (bd);
1587		*(int *)data = cx_get_port (c);
1588		CX_UNLOCK (bd);
1589		splx (s);
1590		if (*(int *)data<0)
1591			return (EINVAL);
1592		else
1593			return 0;
1594
1595	case SERIAL_SETPORT:
1596		CX_DEBUG2 (d, ("ioctl: setproto\n"));
1597		/* Only for superuser! */
1598		error = priv_check (td, PRIV_DRIVER);
1599		if (error)
1600			return error;
1601
1602		s = splhigh ();
1603		CX_LOCK (bd);
1604		cx_set_port (c, *(int *)data);
1605		CX_UNLOCK (bd);
1606		splx (s);
1607		return 0;
1608
1609#ifndef NETGRAPH
1610	case SERIAL_GETPROTO:
1611		CX_DEBUG2 (d, ("ioctl: getproto\n"));
1612		s = splhigh ();
1613		CX_LOCK (bd);
1614		strcpy ((char*)data, (c->mode == M_ASYNC) ? "async" :
1615			(IFP2SP(d->ifp)->pp_flags & PP_FR) ? "fr" :
1616			(d->ifp->if_flags & PP_CISCO) ? "cisco" : "ppp");
1617		CX_UNLOCK (bd);
1618		splx (s);
1619		return 0;
1620
1621	case SERIAL_SETPROTO:
1622		CX_DEBUG2 (d, ("ioctl: setproto\n"));
1623		/* Only for superuser! */
1624		error = priv_check (td, PRIV_DRIVER);
1625		if (error)
1626			return error;
1627		if (c->mode == M_ASYNC)
1628			return EBUSY;
1629		if (d->ifp->if_drv_flags & IFF_DRV_RUNNING)
1630			return EBUSY;
1631		if (! strcmp ("cisco", (char*)data)) {
1632			IFP2SP(d->ifp)->pp_flags &= ~(PP_FR);
1633			IFP2SP(d->ifp)->pp_flags |= PP_KEEPALIVE;
1634			d->ifp->if_flags |= PP_CISCO;
1635		} else if (! strcmp ("fr", (char*)data)) {
1636			d->ifp->if_flags &= ~(PP_CISCO);
1637			IFP2SP(d->ifp)->pp_flags |= PP_FR | PP_KEEPALIVE;
1638		} else if (! strcmp ("ppp", (char*)data)) {
1639			IFP2SP(d->ifp)->pp_flags &= ~(PP_FR | PP_KEEPALIVE);
1640			d->ifp->if_flags &= ~(PP_CISCO);
1641		} else
1642			return EINVAL;
1643		return 0;
1644
1645	case SERIAL_GETKEEPALIVE:
1646		CX_DEBUG2 (d, ("ioctl: getkeepalive\n"));
1647		if ((IFP2SP(d->ifp)->pp_flags & PP_FR) ||
1648		    (d->ifp->if_flags & PP_CISCO) ||
1649		    (c->mode == M_ASYNC))
1650			return EINVAL;
1651		s = splhigh ();
1652		CX_LOCK (bd);
1653		*(int*)data = (IFP2SP(d->ifp)->pp_flags & PP_KEEPALIVE) ? 1 : 0;
1654		CX_UNLOCK (bd);
1655		splx (s);
1656		return 0;
1657
1658	case SERIAL_SETKEEPALIVE:
1659		CX_DEBUG2 (d, ("ioctl: setkeepalive\n"));
1660		/* Only for superuser! */
1661		error = priv_check (td, PRIV_DRIVER);
1662		if (error)
1663			return error;
1664		if ((IFP2SP(d->ifp)->pp_flags & PP_FR) ||
1665			(d->ifp->if_flags & PP_CISCO))
1666			return EINVAL;
1667		s = splhigh ();
1668		CX_LOCK (bd);
1669		if (*(int*)data)
1670			IFP2SP(d->ifp)->pp_flags |= PP_KEEPALIVE;
1671		else
1672			IFP2SP(d->ifp)->pp_flags &= ~PP_KEEPALIVE;
1673		CX_UNLOCK (bd);
1674		splx (s);
1675		return 0;
1676#endif /*NETGRAPH*/
1677
1678	case SERIAL_GETMODE:
1679		CX_DEBUG2 (d, ("ioctl: getmode\n"));
1680		s = splhigh ();
1681		CX_LOCK (bd);
1682		*(int*)data = (c->mode == M_ASYNC) ?
1683			SERIAL_ASYNC : SERIAL_HDLC;
1684		CX_UNLOCK (bd);
1685		splx (s);
1686		return 0;
1687
1688	case SERIAL_SETMODE:
1689		CX_DEBUG2 (d, ("ioctl: setmode\n"));
1690		/* Only for superuser! */
1691		error = priv_check (td, PRIV_DRIVER);
1692		if (error)
1693			return error;
1694
1695		/* Somebody is waiting for carrier? */
1696		if (d->lock)
1697			return EBUSY;
1698		/* /dev/ttyXX is already opened by someone? */
1699		if (c->mode == M_ASYNC && d->tty && (d->tty->t_state & TS_ISOPEN) &&
1700		    (d->open_dev|0x2))
1701			return EBUSY;
1702		/* Network interface is up?
1703		 * Cannot change to async mode. */
1704		if (c->mode != M_ASYNC && d->running &&
1705		    (*(int*)data == SERIAL_ASYNC))
1706			return EBUSY;
1707
1708		s = splhigh ();
1709		CX_LOCK (bd);
1710		if (c->mode == M_HDLC && *(int*)data == SERIAL_ASYNC) {
1711			cx_set_mode (c, M_ASYNC);
1712			cx_enable_receive (c, 0);
1713			cx_enable_transmit (c, 0);
1714		} else if (c->mode == M_ASYNC && *(int*)data == SERIAL_HDLC) {
1715			if (d->ifp->if_flags & IFF_DEBUG)
1716				c->debug = c->debug_shadow;
1717			cx_set_mode (c, M_HDLC);
1718			cx_enable_receive (c, 1);
1719			cx_enable_transmit (c, 1);
1720		}
1721		CX_UNLOCK (bd);
1722		splx (s);
1723		return 0;
1724
1725	case SERIAL_GETSTAT:
1726		CX_DEBUG2 (d, ("ioctl: getestat\n"));
1727		st = (struct serial_statistics*) data;
1728		s = splhigh ();
1729		CX_LOCK (bd);
1730		st->rintr  = c->rintr;
1731		st->tintr  = c->tintr;
1732		st->mintr  = c->mintr;
1733		st->ibytes = c->ibytes;
1734		st->ipkts  = c->ipkts;
1735		st->ierrs  = c->ierrs;
1736		st->obytes = c->obytes;
1737		st->opkts  = c->opkts;
1738		st->oerrs  = c->oerrs;
1739		CX_UNLOCK (bd);
1740		splx (s);
1741		return 0;
1742
1743	case SERIAL_CLRSTAT:
1744		CX_DEBUG2 (d, ("ioctl: clrstat\n"));
1745		/* Only for superuser! */
1746		error = priv_check (td, PRIV_DRIVER);
1747		if (error)
1748			return error;
1749		s = splhigh ();
1750		CX_LOCK (bd);
1751		c->rintr = 0;
1752		c->tintr = 0;
1753		c->mintr = 0;
1754		c->ibytes = 0;
1755		c->ipkts = 0;
1756		c->ierrs = 0;
1757		c->obytes = 0;
1758		c->opkts = 0;
1759		c->oerrs = 0;
1760		CX_UNLOCK (bd);
1761		splx (s);
1762		return 0;
1763
1764	case SERIAL_GETBAUD:
1765		CX_DEBUG2 (d, ("ioctl: getbaud\n"));
1766		if (c->mode == M_ASYNC)
1767			return EINVAL;
1768		s = splhigh ();
1769		CX_LOCK (bd);
1770		*(long*)data = cx_get_baud(c);
1771		CX_UNLOCK (bd);
1772		splx (s);
1773		return 0;
1774
1775	case SERIAL_SETBAUD:
1776		CX_DEBUG2 (d, ("ioctl: setbaud\n"));
1777		/* Only for superuser! */
1778		error = priv_check (td, PRIV_DRIVER);
1779		if (error)
1780			return error;
1781		if (c->mode == M_ASYNC)
1782			return EINVAL;
1783		s = splhigh ();
1784		CX_LOCK (bd);
1785		cx_set_baud (c, *(long*)data);
1786		CX_UNLOCK (bd);
1787		splx (s);
1788		return 0;
1789
1790	case SERIAL_GETLOOP:
1791		CX_DEBUG2 (d, ("ioctl: getloop\n"));
1792		if (c->mode == M_ASYNC)
1793			return EINVAL;
1794		s = splhigh ();
1795		CX_LOCK (bd);
1796		*(int*)data = cx_get_loop (c);
1797		CX_UNLOCK (bd);
1798		splx (s);
1799		return 0;
1800
1801	case SERIAL_SETLOOP:
1802		CX_DEBUG2 (d, ("ioctl: setloop\n"));
1803		/* Only for superuser! */
1804		error = priv_check (td, PRIV_DRIVER);
1805		if (error)
1806			return error;
1807		if (c->mode == M_ASYNC)
1808			return EINVAL;
1809		s = splhigh ();
1810		CX_LOCK (bd);
1811		cx_set_loop (c, *(int*)data);
1812		CX_UNLOCK (bd);
1813		splx (s);
1814		return 0;
1815
1816	case SERIAL_GETDPLL:
1817		CX_DEBUG2 (d, ("ioctl: getdpll\n"));
1818		if (c->mode == M_ASYNC)
1819			return EINVAL;
1820		s = splhigh ();
1821		CX_LOCK (bd);
1822		*(int*)data = cx_get_dpll (c);
1823		CX_UNLOCK (bd);
1824		splx (s);
1825		return 0;
1826
1827	case SERIAL_SETDPLL:
1828		CX_DEBUG2 (d, ("ioctl: setdpll\n"));
1829		/* Only for superuser! */
1830		error = priv_check (td, PRIV_DRIVER);
1831		if (error)
1832			return error;
1833		if (c->mode == M_ASYNC)
1834			return EINVAL;
1835		s = splhigh ();
1836		CX_LOCK (bd);
1837		cx_set_dpll (c, *(int*)data);
1838		CX_UNLOCK (bd);
1839		splx (s);
1840		return 0;
1841
1842	case SERIAL_GETNRZI:
1843		CX_DEBUG2 (d, ("ioctl: getnrzi\n"));
1844		if (c->mode == M_ASYNC)
1845			return EINVAL;
1846		s = splhigh ();
1847		CX_LOCK (bd);
1848		*(int*)data = cx_get_nrzi (c);
1849		CX_UNLOCK (bd);
1850		splx (s);
1851		return 0;
1852
1853	case SERIAL_SETNRZI:
1854		CX_DEBUG2 (d, ("ioctl: setnrzi\n"));
1855		/* Only for superuser! */
1856		error = priv_check (td, PRIV_DRIVER);
1857		if (error)
1858			return error;
1859		if (c->mode == M_ASYNC)
1860			return EINVAL;
1861		s = splhigh ();
1862		CX_LOCK (bd);
1863		cx_set_nrzi (c, *(int*)data);
1864		CX_UNLOCK (bd);
1865		splx (s);
1866		return 0;
1867
1868	case SERIAL_GETDEBUG:
1869		CX_DEBUG2 (d, ("ioctl: getdebug\n"));
1870		s = splhigh ();
1871		CX_LOCK (bd);
1872		*(int*)data = c->debug;
1873		CX_UNLOCK (bd);
1874		splx (s);
1875		return 0;
1876
1877	case SERIAL_SETDEBUG:
1878		CX_DEBUG2 (d, ("ioctl: setdebug\n"));
1879		/* Only for superuser! */
1880		error = priv_check (td, PRIV_DRIVER);
1881		if (error)
1882			return error;
1883		s = splhigh ();
1884		CX_LOCK (bd);
1885#ifndef	NETGRAPH
1886		if (c->mode == M_ASYNC) {
1887			c->debug = *(int*)data;
1888		} else {
1889			/*
1890			 * The debug_shadow is always greater than zero for
1891			 * logic simplicity.  For switching debug off the
1892			 * IFF_DEBUG is responsible (for !M_ASYNC mode).
1893			 */
1894			c->debug_shadow = (*(int*)data) ? (*(int*)data) : 1;
1895			if (d->ifp->if_flags & IFF_DEBUG)
1896				c->debug = c->debug_shadow;
1897		}
1898#else
1899		c->debug = *(int*)data;
1900#endif
1901		CX_UNLOCK (bd);
1902		splx (s);
1903		return 0;
1904	}
1905
1906	switch (cmd) {
1907	case TIOCSDTR:	/* Set DTR */
1908		CX_DEBUG2 (d, ("ioctl: tiocsdtr\n"));
1909		s = splhigh ();
1910		CX_LOCK (bd);
1911		cx_set_dtr (c, 1);
1912		CX_UNLOCK (bd);
1913		splx (s);
1914		return 0;
1915
1916	case TIOCCDTR:	/* Clear DTR */
1917		CX_DEBUG2 (d, ("ioctl: tioccdtr\n"));
1918		s = splhigh ();
1919		CX_LOCK (bd);
1920		cx_set_dtr (c, 0);
1921		CX_UNLOCK (bd);
1922		splx (s);
1923		return 0;
1924
1925	case TIOCMSET:	/* Set DTR/RTS */
1926		CX_DEBUG2 (d, ("ioctl: tiocmset\n"));
1927		s = splhigh ();
1928		CX_LOCK (bd);
1929		cx_set_dtr (c, (*(int*)data & TIOCM_DTR) ? 1 : 0);
1930		cx_set_rts (c, (*(int*)data & TIOCM_RTS) ? 1 : 0);
1931		CX_UNLOCK (bd);
1932		splx (s);
1933		return 0;
1934
1935	case TIOCMBIS:	/* Add DTR/RTS */
1936		CX_DEBUG2 (d, ("ioctl: tiocmbis\n"));
1937		s = splhigh ();
1938		CX_LOCK (bd);
1939		if (*(int*)data & TIOCM_DTR) cx_set_dtr (c, 1);
1940		if (*(int*)data & TIOCM_RTS) cx_set_rts (c, 1);
1941		CX_UNLOCK (bd);
1942		splx (s);
1943		return 0;
1944
1945	case TIOCMBIC:	/* Clear DTR/RTS */
1946		CX_DEBUG2 (d, ("ioctl: tiocmbic\n"));
1947		s = splhigh ();
1948		CX_LOCK (bd);
1949		if (*(int*)data & TIOCM_DTR) cx_set_dtr (c, 0);
1950		if (*(int*)data & TIOCM_RTS) cx_set_rts (c, 0);
1951		CX_UNLOCK (bd);
1952		splx (s);
1953		return 0;
1954
1955	case TIOCMGET:	/* Get modem status */
1956		CX_DEBUG2 (d, ("ioctl: tiocmget\n"));
1957		*(int*)data = cx_modem_status (d);
1958		return 0;
1959
1960	}
1961
1962	CX_DEBUG2 (d, ("ioctl: 0x%lx\n", cmd));
1963	return ENOTTY;
1964}
1965
1966void cx_softintr (void *unused)
1967{
1968	drv_t *d;
1969	bdrv_t *bd;
1970	async_q *q;
1971	int i, s, ic, k;
1972	while (MY_SOFT_INTR) {
1973		MY_SOFT_INTR = 0;
1974		for (i=0; i<NCX*NCHAN; ++i) {
1975			d = channel [i];
1976			if (!d || !d->chan || d->chan->type == T_NONE
1977			    || d->chan->mode != M_ASYNC || !d->tty
1978			    || !d->tty->t_dev)
1979				continue;
1980			bd = d->board->sys;
1981			s = splhigh ();
1982			CX_LOCK (bd);
1983			if (d->intr_action & CX_READ) {
1984				q = &(d->aqueue);
1985				if (d->tty->t_state & TS_CAN_BYPASS_L_RINT) {
1986					k = AQ_GSZ(q);
1987					if (d->tty->t_rawq.c_cc + k >
1988						d->tty->t_ihiwat
1989					    && (d->tty->t_cflag & CRTS_IFLOW
1990						|| d->tty->t_iflag & IXOFF)
1991					    && !(d->tty->t_state & TS_TBLOCK))
1992						ttyblock(d->tty);
1993					d->tty->t_rawcc += k;
1994					while (k>0) {
1995						k--;
1996						AQ_POP (q, ic);
1997						CX_UNLOCK (bd);
1998						splx (s);
1999						putc (ic, &d->tty->t_rawq);
2000						s = splhigh ();
2001						CX_LOCK (bd);
2002					}
2003					ttwakeup(d->tty);
2004					if (d->tty->t_state & TS_TTSTOP
2005					    && (d->tty->t_iflag & IXANY
2006						|| d->tty->t_cc[VSTART] ==
2007						d->tty->t_cc[VSTOP])) {
2008						d->tty->t_state &= ~TS_TTSTOP;
2009						d->tty->t_lflag &= ~FLUSHO;
2010						d->intr_action |= CX_WRITE;
2011					}
2012				} else {
2013					while (q->end != q->beg) {
2014						AQ_POP (q, ic);
2015						CX_UNLOCK (bd);
2016						splx (s);
2017						ttyld_rint (d->tty, ic);
2018						s = splhigh ();
2019						CX_LOCK (bd);
2020					}
2021				}
2022				d->intr_action &= ~CX_READ;
2023			}
2024			splx (s);
2025			CX_UNLOCK (bd);
2026
2027			s = splhigh ();
2028			CX_LOCK (bd);
2029			if (d->intr_action & CX_WRITE) {
2030				if (d->tty->t_line)
2031					ttyld_start (d->tty);
2032				else
2033					cx_oproc (d->tty);
2034				d->intr_action &= ~CX_WRITE;
2035			}
2036			CX_UNLOCK (bd);
2037			splx (s);
2038
2039		}
2040	}
2041}
2042
2043/*
2044 * Fill transmitter buffer with data.
2045 */
2046static void cx_oproc (struct tty *tp)
2047{
2048	int s, k;
2049	drv_t *d;
2050	bdrv_t *bd;
2051	static u_char buf[DMABUFSZ];
2052	u_char *p;
2053	u_short len = 0, sublen = 0;
2054
2055	d = tp->t_sc;
2056	bd = d->board->sys;
2057
2058	CX_DEBUG2 (d, ("cx_oproc\n"));
2059
2060	s = splhigh ();
2061	CX_LOCK (bd);
2062
2063	if (tp->t_cflag & CRTSCTS && (tp->t_state & TS_TBLOCK) && d->chan->rts)
2064		cx_set_rts (d->chan, 0);
2065	else if (tp->t_cflag & CRTSCTS && ! (tp->t_state & TS_TBLOCK) && ! d->chan->rts)
2066		cx_set_rts (d->chan, 1);
2067
2068	if (! (tp->t_state & (TS_TIMEOUT | TS_TTSTOP))) {
2069		/* Start transmitter. */
2070		cx_enable_transmit (d->chan, 1);
2071
2072		/* Is it busy? */
2073		if (! cx_buf_free (d->chan)) {
2074			tp->t_state |= TS_BUSY;
2075			CX_UNLOCK (bd);
2076			splx (s);
2077			return;
2078		}
2079		if (tp->t_iflag & IXOFF) {
2080			p = (buf + (DMABUFSZ/2));
2081			sublen = q_to_b (&tp->t_outq, p, (DMABUFSZ/2));
2082			k = sublen;
2083			while (k--) {
2084				/* Send XON/XOFF out of band. */
2085				if (*p == tp->t_cc[VSTOP]) {
2086					cx_xflow_ctl (d->chan, 0);
2087					p++;
2088					continue;
2089				}
2090				if (*p == tp->t_cc[VSTART]) {
2091					cx_xflow_ctl (d->chan, 1);
2092					p++;
2093					continue;
2094				}
2095				buf[len] = *p;
2096				len++;
2097				p++;
2098			}
2099		} else {
2100			p = buf;
2101			len = q_to_b (&tp->t_outq, p, (DMABUFSZ/2));
2102		}
2103		if (len) {
2104			cx_send_packet (d->chan, buf, len, 0);
2105			tp->t_state |= TS_BUSY;
2106			d->atimeout = 10;
2107			CX_DEBUG2 (d, ("out %d bytes\n", len));
2108		}
2109	}
2110	ttwwakeup (tp);
2111	CX_UNLOCK (bd);
2112	splx (s);
2113}
2114
2115static int cx_param (struct tty *tp, struct termios *t)
2116{
2117	drv_t *d;
2118	bdrv_t *bd;
2119	int s, bits, parity;
2120
2121	d = tp->t_sc;
2122	bd = d->board->sys;
2123
2124	s = splhigh ();
2125	CX_LOCK (bd);
2126	if (t->c_ospeed == 0) {
2127		/* Clear DTR and RTS. */
2128		cx_set_dtr (d->chan, 0);
2129		CX_UNLOCK (bd);
2130		splx (s);
2131		CX_DEBUG2 (d, ("cx_param (hangup)\n"));
2132		return 0;
2133	}
2134	CX_DEBUG2 (d, ("cx_param\n"));
2135
2136	/* Check requested parameters. */
2137	if (t->c_ospeed < 300 || t->c_ospeed > 256*1024) {
2138		CX_UNLOCK (bd);
2139		splx (s);
2140		return EINVAL;
2141	}
2142	if (t->c_ispeed && (t->c_ispeed < 300 || t->c_ispeed > 256*1024)) {
2143		CX_UNLOCK (bd);
2144		splx (s);
2145		return EINVAL;
2146	}
2147
2148  	/* And copy them to tty and channel structures. */
2149	tp->t_ispeed = t->c_ispeed = tp->t_ospeed = t->c_ospeed;
2150	tp->t_cflag = t->c_cflag;
2151
2152	/* Set character length and parity mode. */
2153	switch (t->c_cflag & CSIZE) {
2154	default:
2155	case CS8: bits = 8; break;
2156	case CS7: bits = 7; break;
2157	case CS6: bits = 6; break;
2158	case CS5: bits = 5; break;
2159	}
2160
2161	parity = ((t->c_cflag & PARENB) ? 1 : 0) *
2162		 (1 + ((t->c_cflag & PARODD) ? 0 : 1));
2163
2164	/* Set current channel number. */
2165	if (! d->chan->dtr)
2166		cx_set_dtr (d->chan, 1);
2167
2168	ttyldoptim (tp);
2169	cx_set_async_param (d->chan, t->c_ospeed, bits, parity, (t->c_cflag & CSTOPB),
2170		!(t->c_cflag & PARENB), (t->c_cflag & CRTSCTS),
2171		(t->c_iflag & IXON), (t->c_iflag & IXANY),
2172		t->c_cc[VSTART], t->c_cc[VSTOP]);
2173	CX_UNLOCK (bd);
2174	splx (s);
2175	return 0;
2176}
2177
2178/*
2179 * Stop output on a line
2180 */
2181static void cx_stop (struct tty *tp, int flag)
2182{
2183	drv_t *d;
2184	bdrv_t *bd;
2185	int s;
2186
2187	d = tp->t_sc;
2188	bd = d->board->sys;
2189
2190	s = splhigh ();
2191	CX_LOCK (bd);
2192	if (tp->t_state & TS_BUSY) {
2193		/* Stop transmitter */
2194		CX_DEBUG2 (d, ("cx_stop\n"));
2195		cx_transmitter_ctl (d->chan, 0);
2196	}
2197	CX_UNLOCK (bd);
2198	splx (s);
2199}
2200
2201/*
2202 * Process the (delayed) carrier signal setup.
2203 */
2204static void cx_carrier (void *arg)
2205{
2206	drv_t *d = arg;
2207	bdrv_t *bd = d->board->sys;
2208	cx_chan_t *c = d->chan;
2209	int s, cd;
2210
2211	s = splhigh ();
2212	CX_LOCK (bd);
2213	cd = cx_get_cd (c);
2214	if (d->cd != cd) {
2215		if (cd) {
2216			CX_DEBUG (d, ("carrier on\n"));
2217			d->cd = 1;
2218			CX_UNLOCK (bd);
2219			splx (s);
2220			if (d->tty)
2221				ttyld_modem(d->tty, 1);
2222		} else {
2223			CX_DEBUG (d, ("carrier loss\n"));
2224			d->cd = 0;
2225			CX_UNLOCK (bd);
2226			splx (s);
2227			if (d->tty)
2228				ttyld_modem(d->tty, 0);
2229		}
2230	} else {
2231		CX_UNLOCK (bd);
2232		splx (s);
2233	}
2234}
2235
2236/*
2237 * Modem signal callback function.
2238 */
2239static void cx_modem (cx_chan_t *c)
2240{
2241	drv_t *d = c->sys;
2242
2243	if (!d || c->mode != M_ASYNC)
2244		return;
2245	/* Handle carrier detect/loss. */
2246	/* Carrier changed - delay processing DCD for a while
2247	 * to give both sides some time to initialize. */
2248	callout_reset (&d->dcd_timeout_handle, hz/2, cx_carrier, d);
2249}
2250
2251#ifdef NETGRAPH
2252static int ng_cx_constructor (node_p node)
2253{
2254	drv_t *d = NG_NODE_PRIVATE (node);
2255	CX_DEBUG (d, ("Constructor\n"));
2256	return EINVAL;
2257}
2258
2259static int ng_cx_newhook (node_p node, hook_p hook, const char *name)
2260{
2261	int s;
2262	drv_t *d = NG_NODE_PRIVATE (node);
2263	bdrv_t *bd = d->board->sys;
2264
2265	if (d->chan->mode == M_ASYNC)
2266		return EINVAL;
2267
2268	/* Attach debug hook */
2269	if (strcmp (name, NG_CX_HOOK_DEBUG) == 0) {
2270		NG_HOOK_SET_PRIVATE (hook, NULL);
2271		d->debug_hook = hook;
2272		return 0;
2273	}
2274
2275	/* Check for raw hook */
2276	if (strcmp (name, NG_CX_HOOK_RAW) != 0)
2277		return EINVAL;
2278
2279	NG_HOOK_SET_PRIVATE (hook, d);
2280	d->hook = hook;
2281	s = splhigh ();
2282	CX_LOCK (bd);
2283	cx_up (d);
2284	CX_UNLOCK (bd);
2285	splx (s);
2286	return 0;
2287}
2288
2289static int print_modems (char *s, cx_chan_t *c, int need_header)
2290{
2291	int status = cx_modem_status (c->sys);
2292	int length = 0;
2293
2294	if (need_header)
2295		length += sprintf (s + length, "  LE   DTR  DSR  RTS  CTS  CD\n");
2296	length += sprintf (s + length, "%4s %4s %4s %4s %4s %4s\n",
2297		status & TIOCM_LE  ? "On" : "-",
2298		status & TIOCM_DTR ? "On" : "-",
2299		status & TIOCM_DSR ? "On" : "-",
2300		status & TIOCM_RTS ? "On" : "-",
2301		status & TIOCM_CTS ? "On" : "-",
2302		status & TIOCM_CD  ? "On" : "-");
2303	return length;
2304}
2305
2306static int print_stats (char *s, cx_chan_t *c, int need_header)
2307{
2308	int length = 0;
2309
2310	if (need_header)
2311		length += sprintf (s + length, "  Rintr   Tintr   Mintr   Ibytes   Ipkts   Ierrs   Obytes   Opkts   Oerrs\n");
2312	length += sprintf (s + length, "%7ld %7ld %7ld %8ld %7ld %7ld %8ld %7ld %7ld\n",
2313		c->rintr, c->tintr, c->mintr, c->ibytes, c->ipkts,
2314		c->ierrs, c->obytes, c->opkts, c->oerrs);
2315	return length;
2316}
2317
2318static int print_chan (char *s, cx_chan_t *c)
2319{
2320	drv_t *d = c->sys;
2321	int length = 0;
2322
2323	length += sprintf (s + length, "cx%d", c->board->num * NCHAN + c->num);
2324	if (d->chan->debug)
2325		length += sprintf (s + length, " debug=%d", d->chan->debug);
2326
2327	if (cx_get_baud (c))
2328		length += sprintf (s + length, " %ld", cx_get_baud (c));
2329	else
2330		length += sprintf (s + length, " extclock");
2331
2332	if (c->mode == M_HDLC) {
2333		length += sprintf (s + length, " dpll=%s", cx_get_dpll (c) ? "on" : "off");
2334		length += sprintf (s + length, " nrzi=%s", cx_get_nrzi (c) ? "on" : "off");
2335	}
2336
2337	length += sprintf (s + length, " loop=%s", cx_get_loop (c) ? "on\n" : "off\n");
2338	return length;
2339}
2340
2341static int ng_cx_rcvmsg (node_p node, item_p item, hook_p lasthook)
2342{
2343	drv_t *d = NG_NODE_PRIVATE (node);
2344	struct ng_mesg *msg;
2345	struct ng_mesg *resp = NULL;
2346	int error = 0;
2347
2348	if (!d)
2349		return EINVAL;
2350
2351	CX_DEBUG (d, ("Rcvmsg\n"));
2352	NGI_GET_MSG (item, msg);
2353	switch (msg->header.typecookie) {
2354	default:
2355		error = EINVAL;
2356		break;
2357
2358	case NGM_CX_COOKIE:
2359		printf ("Don't forget to implement\n");
2360		error = EINVAL;
2361		break;
2362
2363	case NGM_GENERIC_COOKIE:
2364		switch (msg->header.cmd) {
2365		default:
2366			error = EINVAL;
2367			break;
2368
2369		case NGM_TEXT_STATUS: {
2370			char *s;
2371			int l = 0;
2372			int dl = sizeof (struct ng_mesg) + 730;
2373
2374			NG_MKRESPONSE (resp, msg, dl, M_NOWAIT);
2375			if (! resp) {
2376				error = ENOMEM;
2377				break;
2378			}
2379			bzero (resp, dl);
2380			s = (resp)->data;
2381			l += print_chan (s + l, d->chan);
2382			l += print_stats (s + l, d->chan, 1);
2383			l += print_modems (s + l, d->chan, 1);
2384			strncpy ((resp)->header.cmdstr, "status", NG_CMDSTRSIZ);
2385			}
2386			break;
2387		}
2388		break;
2389	}
2390	NG_RESPOND_MSG (error, node, item, resp);
2391	NG_FREE_MSG (msg);
2392	return error;
2393}
2394
2395static int ng_cx_rcvdata (hook_p hook, item_p item)
2396{
2397	drv_t *d = NG_NODE_PRIVATE (NG_HOOK_NODE(hook));
2398	struct mbuf *m;
2399	struct ng_tag_prio *ptag;
2400	bdrv_t *bd;
2401	struct ifqueue *q;
2402	int s;
2403
2404	NGI_GET_M (item, m);
2405	NG_FREE_ITEM (item);
2406	if (! NG_HOOK_PRIVATE (hook) || ! d) {
2407		NG_FREE_M (m);
2408		return ENETDOWN;
2409	}
2410
2411	bd = d->board->sys;
2412	/* Check for high priority data */
2413	if ((ptag = (struct ng_tag_prio *)m_tag_locate(m, NGM_GENERIC_COOKIE,
2414	    NG_TAG_PRIO, NULL)) != NULL && (ptag->priority > NG_PRIO_CUTOFF) )
2415		q = &d->hi_queue;
2416	else
2417		q = &d->lo_queue;
2418
2419	s = splhigh ();
2420	CX_LOCK (bd);
2421	IF_LOCK (q);
2422	if (_IF_QFULL (q)) {
2423		IF_UNLOCK (q);
2424		CX_UNLOCK (bd);
2425		splx (s);
2426		NG_FREE_M (m);
2427		return ENOBUFS;
2428	}
2429	_IF_ENQUEUE (q, m);
2430	IF_UNLOCK (q);
2431	cx_start (d);
2432	CX_UNLOCK (bd);
2433	splx (s);
2434	return 0;
2435}
2436
2437static int ng_cx_rmnode (node_p node)
2438{
2439	drv_t *d = NG_NODE_PRIVATE (node);
2440	bdrv_t *bd;
2441
2442	CX_DEBUG (d, ("Rmnode\n"));
2443	if (d && d->running) {
2444		int s = splhigh ();
2445		bd = d->board->sys;
2446		CX_LOCK (bd);
2447		cx_down (d);
2448		CX_UNLOCK (bd);
2449		splx (s);
2450	}
2451#ifdef	KLD_MODULE
2452	if (node->nd_flags & NGF_REALLY_DIE) {
2453		NG_NODE_SET_PRIVATE (node, NULL);
2454		NG_NODE_UNREF (node);
2455	}
2456	NG_NODE_REVIVE(node);		/* Persistent node */
2457#endif
2458	return 0;
2459}
2460
2461static int ng_cx_connect (hook_p hook)
2462{
2463	drv_t *d = NG_NODE_PRIVATE (NG_HOOK_NODE (hook));
2464
2465	callout_reset (&d->timeout_handle, hz, cx_watchdog_timer, d);
2466	return 0;
2467}
2468
2469static int ng_cx_disconnect (hook_p hook)
2470{
2471	drv_t *d = NG_NODE_PRIVATE (NG_HOOK_NODE (hook));
2472	bdrv_t *bd = d->board->sys;
2473	int s;
2474
2475	s = splhigh ();
2476	CX_LOCK (bd);
2477	if (NG_HOOK_PRIVATE (hook))
2478		cx_down (d);
2479	CX_UNLOCK (bd);
2480	splx (s);
2481	/* If we were wait it than it reasserted now, just stop it. */
2482	if (!callout_drain (&d->timeout_handle))
2483		callout_stop (&d->timeout_handle);
2484	return 0;
2485}
2486#endif /*NETGRAPH*/
2487
2488static int cx_modevent (module_t mod, int type, void *unused)
2489{
2490	static int load_count = 0;
2491
2492	switch (type) {
2493	case MOD_LOAD:
2494#ifdef NETGRAPH
2495		if (ng_newtype (&typestruct))
2496			printf ("Failed to register ng_cx\n");
2497#endif
2498		++load_count;
2499
2500		callout_init (&timeout_handle, 1);
2501		callout_reset (&timeout_handle, hz*5, cx_timeout, 0);
2502		/* Software interrupt. */
2503		swi_add(&tty_intr_event, "cx", cx_softintr, NULL, SWI_TTY,
2504		    INTR_MPSAFE, &cx_fast_ih);
2505		break;
2506	case MOD_UNLOAD:
2507		if (load_count == 1) {
2508			printf ("Removing device entry for Sigma\n");
2509#ifdef NETGRAPH
2510			ng_rmtype (&typestruct);
2511#endif
2512		}
2513		/* If we were wait it than it reasserted now, just stop it. */
2514		if (!callout_drain (&timeout_handle))
2515			callout_stop (&timeout_handle);
2516		swi_remove (cx_fast_ih);
2517		--load_count;
2518		break;
2519	case MOD_SHUTDOWN:
2520		break;
2521	}
2522	return 0;
2523}
2524
2525#ifdef NETGRAPH
2526static struct ng_type typestruct = {
2527	.version	= NG_ABI_VERSION,
2528	.name		= NG_CX_NODE_TYPE,
2529	.constructor	= ng_cx_constructor,
2530	.rcvmsg		= ng_cx_rcvmsg,
2531	.shutdown	= ng_cx_rmnode,
2532	.newhook	= ng_cx_newhook,
2533	.connect	= ng_cx_connect,
2534	.rcvdata	= ng_cx_rcvdata,
2535	.disconnect	= ng_cx_disconnect,
2536};
2537#endif /*NETGRAPH*/
2538
2539#ifdef NETGRAPH
2540MODULE_DEPEND (ng_cx, netgraph, NG_ABI_VERSION, NG_ABI_VERSION, NG_ABI_VERSION);
2541#else
2542MODULE_DEPEND (isa_cx, sppp, 1, 1, 1);
2543#endif
2544DRIVER_MODULE (cx, isa, cx_isa_driver, cx_devclass, cx_modevent, NULL);
2545MODULE_VERSION (cx, 1);
2546