- Fix indentation in VarFind()
[dragonfly.git] / sys / dev / serial / si / si.c
1 /*
2  * Device driver for Specialix range (SI/XIO) of serial line multiplexors.
3  *
4  * Copyright (C) 1990, 1992, 1998 Specialix International,
5  * Copyright (C) 1993, Andy Rutter <andy@acronym.co.uk>
6  * Copyright (C) 2000, Peter Wemm <peter@netplex.com.au>
7  *
8  * Originally derived from:     SunOS 4.x version
9  * Ported from BSDI version to FreeBSD by Peter Wemm.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notices, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notices, this list of conditions and the following disclaimer in the
18  *    documentation and/or other materials provided with the distribution.
19  * 3. All advertising materials mentioning features or use of this software
20  *    must display the following acknowledgement:
21  *      This product includes software developed by Andy Rutter of
22  *      Advanced Methods and Tools Ltd. based on original information
23  *      from Specialix International.
24  * 4. Neither the name of Advanced Methods and Tools, nor Specialix
25  *    International may be used to endorse or promote products derived from
26  *    this software without specific prior written permission.
27  *
28  * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
29  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
30  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
31  * NO EVENT SHALL THE AUTHORS BE LIABLE.
32  *
33  * $FreeBSD: src/sys/dev/si/si.c,v 1.101.2.1 2001/02/26 04:23:06 jlemon Exp $
34  * $DragonFly: src/sys/dev/serial/si/si.c,v 1.13 2004/09/19 01:20:42 dillon Exp $
35  */
36
37 #ifndef lint
38 static const char si_copyright1[] =  "@(#) Copyright (C) Specialix International, 1990,1992,1998",
39                   si_copyright2[] =  "@(#) Copyright (C) Andy Rutter 1993",
40                   si_copyright3[] =  "@(#) Copyright (C) Peter Wemm 2000";
41 #endif  /* not lint */
42
43 #include "opt_compat.h"
44 #include "opt_debug_si.h"
45
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #if defined(COMPAT_43) || defined(COMPAT_SUNOS)
49 #include <sys/ioctl_compat.h>
50 #endif
51 #include <sys/tty.h>
52 #include <sys/proc.h>
53 #include <sys/conf.h>
54 #include <sys/fcntl.h>
55 #include <sys/dkstat.h>
56 #include <sys/kernel.h>
57 #include <sys/malloc.h>
58 #include <sys/sysctl.h>
59 #include <sys/bus.h>
60 #include <machine/bus.h>
61 #include <sys/rman.h>
62 #include <machine/resource.h>
63
64 #include <machine/clock.h>
65
66 #include <vm/vm.h>
67 #include <vm/pmap.h>
68
69 #include <machine/stdarg.h>
70
71 #include "sireg.h"
72 #include "sivar.h"
73 #include "si.h"
74
75 /*
76  * This device driver is designed to interface the Specialix International
77  * SI, XIO and SX range of serial multiplexor cards to FreeBSD on an ISA,
78  * EISA or PCI bus machine.
79  *
80  * The controller is interfaced to the host via dual port RAM
81  * and an interrupt.
82  *
83  * The code for the Host 1 (very old ISA cards) has not been tested.
84  */
85
86 #define POLL            /* turn on poller to scan for lost interrupts */
87 #define REALPOLL        /* on each poll, scan for work regardless */
88 #define POLLHZ  (hz/10) /* 10 times per second */
89 #define SI_I_HIGH_WATER (TTYHOG - 2 * SI_BUFFERSIZE)
90 #define INT_COUNT 25000         /* max of 125 ints per second */
91 #define JET_INT_COUNT 100       /* max of 100 ints per second */
92 #define RXINT_COUNT 1   /* one rxint per 10 milliseconds */
93
94 enum si_mctl { GET, SET, BIS, BIC };
95
96 static void si_command(struct si_port *, int, int);
97 static int si_modem(struct si_port *, enum si_mctl, int);
98 static void si_write_enable(struct si_port *, int);
99 static int si_Sioctl(dev_t, u_long, caddr_t, int, struct thread *);
100 static void si_start(struct tty *);
101 static void si_stop(struct tty *, int);
102 static timeout_t si_lstart;
103 static void si_disc_optim(struct tty *tp, struct termios *t,struct si_port *pp);
104 static void sihardclose(struct si_port *pp);
105 static void sidtrwakeup(void *chan);
106
107 #ifdef SI_DEBUG
108 static char     *si_mctl2str(enum si_mctl cmd);
109 #endif
110
111 static int      siparam(struct tty *, struct termios *);
112
113 static void     si_modem_state(struct si_port *pp, struct tty *tp, int hi_ip);
114 static char *   si_modulename(int host_type, int uart_type);
115
116 static  d_open_t        siopen;
117 static  d_close_t       siclose;
118 static  d_write_t       siwrite;
119 static  d_ioctl_t       siioctl;
120
121 #define CDEV_MAJOR      68
122 static struct cdevsw si_cdevsw = {
123         /* name */      "si",
124         /* maj */       CDEV_MAJOR,
125         /* flags */     D_TTY | D_KQFILTER,
126         /* port */      NULL,
127         /* clone */     NULL,
128
129         /* open */      siopen,
130         /* close */     siclose,
131         /* read */      ttyread,
132         /* write */     siwrite,
133         /* ioctl */     siioctl,
134         /* poll */      ttypoll,
135         /* mmap */      nommap,
136         /* strategy */  nostrategy,
137         /* dump */      nodump,
138         /* psize */     nopsize,
139         /* kqfilter */  ttykqfilter
140 };
141
142 static int si_Nports;
143 static int si_Nmodules;
144 static int si_debug = 0;        /* data, not bss, so it's patchable */
145
146 SYSCTL_INT(_machdep, OID_AUTO, si_debug, CTLFLAG_RW, &si_debug, 0, "");
147
148 static struct tty *si__tty;
149
150 static int si_numunits;
151 static struct callout poll_ch;
152
153 devclass_t si_devclass;
154
155 #ifndef B2000   /* not standard, but the hardware knows it. */
156 # define B2000 2000
157 #endif
158 static struct speedtab bdrates[] = {
159         { B75,          CLK75, },       /* 0x0 */
160         { B110,         CLK110, },      /* 0x1 */
161         { B150,         CLK150, },      /* 0x3 */
162         { B300,         CLK300, },      /* 0x4 */
163         { B600,         CLK600, },      /* 0x5 */
164         { B1200,        CLK1200, },     /* 0x6 */
165         { B2000,        CLK2000, },     /* 0x7 */
166         { B2400,        CLK2400, },     /* 0x8 */
167         { B4800,        CLK4800, },     /* 0x9 */
168         { B9600,        CLK9600, },     /* 0xb */
169         { B19200,       CLK19200, },    /* 0xc */
170         { B38400,       CLK38400, },    /* 0x2 (out of order!) */
171         { B57600,       CLK57600, },    /* 0xd */
172         { B115200,      CLK110, },      /* 0x1 (dupe!, 110 baud on "si") */
173         { -1,           -1 },
174 };
175
176
177 /* populated with approx character/sec rates - translated at card
178  * initialisation time to chars per tick of the clock */
179 static int done_chartimes = 0;
180 static struct speedtab chartimes[] = {
181         { B75,          8, },
182         { B110,         11, },
183         { B150,         15, },
184         { B300,         30, },
185         { B600,         60, },
186         { B1200,        120, },
187         { B2000,        200, },
188         { B2400,        240, },
189         { B4800,        480, },
190         { B9600,        960, },
191         { B19200,       1920, },
192         { B38400,       3840, },
193         { B57600,       5760, },
194         { B115200,      11520, },
195         { -1,           -1 },
196 };
197 static volatile int in_intr = 0;        /* Inside interrupt handler? */
198
199 #ifdef POLL
200 static int si_pollrate;                 /* in addition to irq */
201 static int si_realpoll = 0;             /* poll HW on timer */
202
203 SYSCTL_INT(_machdep, OID_AUTO, si_pollrate, CTLFLAG_RW, &si_pollrate, 0, "");
204 SYSCTL_INT(_machdep, OID_AUTO, si_realpoll, CTLFLAG_RW, &si_realpoll, 0, "");
205
206 static int init_finished = 0;
207 static void si_poll(void *);
208 #endif
209
210 /*
211  * Array of adapter types and the corresponding RAM size. The order of
212  * entries here MUST match the ordinal of the adapter type.
213  */
214 static char *si_type[] = {
215         "EMPTY",
216         "SIHOST",
217         "SIMCA",                /* FreeBSD does not support Microchannel */
218         "SIHOST2",
219         "SIEISA",
220         "SIPCI",
221         "SXPCI",
222         "SXISA",
223 };
224
225 /*
226  * We have to make an 8 bit version of bcopy, since some cards can't
227  * deal with 32 bit I/O
228  */
229 static void __inline
230 si_bcopy(const void *src, void *dst, size_t len)
231 {
232         while (len--)
233                 *(((u_char *)dst)++) = *(((const u_char *)src)++);
234 }
235 static void __inline
236 si_vbcopy(const volatile void *src, void *dst, size_t len)
237 {
238         while (len--)
239                 *(((u_char *)dst)++) = *(((const volatile u_char *)src)++);
240 }
241 static void __inline
242 si_bcopyv(const void *src, volatile void *dst, size_t len)
243 {
244         while (len--)
245                 *(((volatile u_char *)dst)++) = *(((const u_char *)src)++);
246 }
247
248
249 /*
250  * Attach the device.  Initialize the card.
251  */
252 int
253 siattach(device_t dev)
254 {
255         int unit;
256         struct si_softc *sc;
257         struct si_port *pp;
258         volatile struct si_channel *ccbp;
259         volatile struct si_reg *regp;
260         volatile caddr_t maddr;
261         struct si_module *modp;
262         struct tty *tp;
263         struct speedtab *spt;
264         int nmodule, nport, x, y;
265         int uart_type;
266         int n;
267
268         if ((poll_ch.c_flags & CALLOUT_DID_INIT) == 0)
269                 callout_init(&poll_ch);
270
271         sc = device_get_softc(dev);
272         unit = device_get_unit(dev);
273
274         sc->sc_typename = si_type[sc->sc_type];
275         if (si_numunits < unit + 1)
276                 si_numunits = unit + 1;
277
278         DPRINT((0, DBG_AUTOBOOT, "si%d: siattach\n", unit));
279
280 #ifdef POLL
281         if (si_pollrate == 0) {
282                 si_pollrate = POLLHZ;           /* in addition to irq */
283 #ifdef REALPOLL
284                 si_realpoll = 1;                /* scan always */
285 #endif
286         }
287 #endif
288
289         DPRINT((0, DBG_AUTOBOOT, "si%d: type: %s paddr: %x maddr: %x\n", unit,
290                 sc->sc_typename, sc->sc_paddr, sc->sc_maddr));
291
292         sc->sc_ports = NULL;                    /* mark as uninitialised */
293
294         maddr = sc->sc_maddr;
295
296         /* Stop the CPU first so it won't stomp around while we load */
297
298         switch (sc->sc_type) {
299                 case SIEISA:
300                         outb(sc->sc_iobase + 2, sc->sc_irq << 4);
301                 break;
302                 case SIPCI:
303                         *(maddr+SIPCIRESET) = 0;
304                 break;
305                 case SIJETPCI: /* fall through to JET ISA */
306                 case SIJETISA:
307                         *(maddr+SIJETCONFIG) = 0;
308                 break;
309                 case SIHOST2:
310                         *(maddr+SIPLRESET) = 0;
311                 break;
312                 case SIHOST:
313                         *(maddr+SIRESET) = 0;
314                 break;
315                 default: /* this should never happen */
316                         printf("si%d: unsupported configuration\n", unit);
317                         return EINVAL;
318                 break;
319         }
320
321         /* OK, now lets download the download code */
322
323         if (SI_ISJET(sc->sc_type)) {
324                 DPRINT((0, DBG_DOWNLOAD, "si%d: jet_download: nbytes %d\n",
325                         unit, si3_t225_dsize));
326                 si_bcopy(si3_t225_download, maddr + si3_t225_downloadaddr,
327                         si3_t225_dsize);
328                 DPRINT((0, DBG_DOWNLOAD,
329                         "si%d: jet_bootstrap: nbytes %d -> %x\n",
330                         unit, si3_t225_bsize, si3_t225_bootloadaddr));
331                 si_bcopy(si3_t225_bootstrap, maddr + si3_t225_bootloadaddr,
332                         si3_t225_bsize);
333         } else {
334                 DPRINT((0, DBG_DOWNLOAD, "si%d: si_download: nbytes %d\n",
335                         unit, si2_z280_dsize));
336                 si_bcopy(si2_z280_download, maddr + si2_z280_downloadaddr,
337                         si2_z280_dsize);
338         }
339
340         /* Now start the CPU */
341
342         switch (sc->sc_type) {
343         case SIEISA:
344                 /* modify the download code to tell it that it's on an EISA */
345                 *(maddr + 0x42) = 1;
346                 outb(sc->sc_iobase + 2, (sc->sc_irq << 4) | 4);
347                 (void)inb(sc->sc_iobase + 3); /* reset interrupt */
348                 break;
349         case SIPCI:
350                 /* modify the download code to tell it that it's on a PCI */
351                 *(maddr+0x42) = 1;
352                 *(maddr+SIPCIRESET) = 1;
353                 *(maddr+SIPCIINTCL) = 0;
354                 break;
355         case SIJETPCI:
356                 *(maddr+SIJETRESET) = 0;
357                 *(maddr+SIJETCONFIG) = SIJETBUSEN|SIJETIRQEN;
358                 break;
359         case SIJETISA:
360                 *(maddr+SIJETRESET) = 0;
361                 switch (sc->sc_irq) {
362                 case 9:
363                         *(maddr+SIJETCONFIG) = SIJETBUSEN|SIJETIRQEN|0x90;
364                         break;
365                 case 10:
366                         *(maddr+SIJETCONFIG) = SIJETBUSEN|SIJETIRQEN|0xa0;
367                         break;
368                 case 11:
369                         *(maddr+SIJETCONFIG) = SIJETBUSEN|SIJETIRQEN|0xb0;
370                         break;
371                 case 12:
372                         *(maddr+SIJETCONFIG) = SIJETBUSEN|SIJETIRQEN|0xc0;
373                         break;
374                 case 15:
375                         *(maddr+SIJETCONFIG) = SIJETBUSEN|SIJETIRQEN|0xf0;
376                         break;
377                 }
378                 break;
379         case SIHOST:
380                 *(maddr+SIRESET_CL) = 0;
381                 *(maddr+SIINTCL_CL) = 0;
382                 break;
383         case SIHOST2:
384                 *(maddr+SIPLRESET) = 0x10;
385                 switch (sc->sc_irq) {
386                 case 11:
387                         *(maddr+SIPLIRQ11) = 0x10;
388                         break;
389                 case 12:
390                         *(maddr+SIPLIRQ12) = 0x10;
391                         break;
392                 case 15:
393                         *(maddr+SIPLIRQ15) = 0x10;
394                         break;
395                 }
396                 *(maddr+SIPLIRQCLR) = 0x10;
397                 break;
398         default: /* this should _REALLY_ never happen */
399                 printf("si%d: Uh, it was supported a second ago...\n", unit);
400                 return EINVAL;
401         }
402
403         DELAY(1000000);                 /* wait around for a second */
404
405         regp = (struct si_reg *)maddr;
406         y = 0;
407                                         /* wait max of 5 sec for init OK */
408         while (regp->initstat == 0 && y++ < 10) {
409                 DELAY(500000);
410         }
411         switch (regp->initstat) {
412         case 0:
413                 printf("si%d: startup timeout - aborting\n", unit);
414                 sc->sc_type = SIEMPTY;
415                 return EINVAL;
416         case 1:
417                 if (SI_ISJET(sc->sc_type)) {
418                         /* set throttle to 100 times per second */
419                         regp->int_count = JET_INT_COUNT;
420                         /* rx_intr_count is a NOP in Jet */
421                 } else {
422                         /* set throttle to 125 times per second */
423                         regp->int_count = INT_COUNT;
424                         /* rx intr max of 25 times per second */
425                         regp->rx_int_count = RXINT_COUNT;
426                 }
427                 regp->int_pending = 0;          /* no intr pending */
428                 regp->int_scounter = 0; /* reset counter */
429                 break;
430         case 0xff:
431                 /*
432                  * No modules found, so give up on this one.
433                  */
434                 printf("si%d: %s - no ports found\n", unit,
435                         si_type[sc->sc_type]);
436                 return 0;
437         default:
438                 printf("si%d: download code version error - initstat %x\n",
439                         unit, regp->initstat);
440                 return EINVAL;
441         }
442
443         /*
444          * First time around the ports just count them in order
445          * to allocate some memory.
446          */
447         nport = 0;
448         modp = (struct si_module *)(maddr + 0x80);
449         for (;;) {
450                 DPRINT((0, DBG_DOWNLOAD, "si%d: ccb addr 0x%x\n", unit, modp));
451                 switch (modp->sm_type) {
452                 case TA4:
453                         DPRINT((0, DBG_DOWNLOAD,
454                                 "si%d: Found old TA4 module, 4 ports\n",
455                                 unit));
456                         x = 4;
457                         break;
458                 case TA8:
459                         DPRINT((0, DBG_DOWNLOAD,
460                                 "si%d: Found old TA8 module, 8 ports\n",
461                                 unit));
462                         x = 8;
463                         break;
464                 case TA4_ASIC:
465                         DPRINT((0, DBG_DOWNLOAD,
466                                 "si%d: Found ASIC TA4 module, 4 ports\n",
467                                 unit));
468                         x = 4;
469                         break;
470                 case TA8_ASIC:
471                         DPRINT((0, DBG_DOWNLOAD,
472                                 "si%d: Found ASIC TA8 module, 8 ports\n",
473                                 unit));
474                         x = 8;
475                         break;
476                 case MTA:
477                         DPRINT((0, DBG_DOWNLOAD,
478                                 "si%d: Found CD1400 module, 8 ports\n",
479                                 unit));
480                         x = 8;
481                         break;
482                 case SXDC:
483                         DPRINT((0, DBG_DOWNLOAD,
484                                 "si%d: Found SXDC module, 8 ports\n",
485                                 unit));
486                         x = 8;
487                         break;
488                 default:
489                         printf("si%d: unknown module type %d\n",
490                                 unit, modp->sm_type);
491                         goto try_next;
492                 }
493
494                 /* this was limited in firmware and is also a driver issue */
495                 if ((nport + x) > SI_MAXPORTPERCARD) {
496                         printf("si%d: extra ports ignored\n", unit);
497                         goto try_next;
498                 }
499
500                 nport += x;
501                 si_Nports += x;
502                 si_Nmodules++;
503
504 try_next:
505                 if (modp->sm_next == 0)
506                         break;
507                 modp = (struct si_module *)
508                         (maddr + (unsigned)(modp->sm_next & 0x7fff));
509         }
510         sc->sc_ports = malloc(sizeof(struct si_port) * nport,
511                                 M_DEVBUF, M_WAITOK | M_ZERO);
512         sc->sc_nport = nport;
513         for (n = 0; n < nport; ++n) {
514                 callout_init(&sc->sc_ports[n].lstart_ch);
515                 callout_init(&sc->sc_ports[n].dtr_ch);
516         }
517
518         /*
519          * allocate tty structures for ports
520          */
521         tp = malloc(sizeof(*tp) * nport, M_DEVBUF, M_WAITOK | M_ZERO);
522         si__tty = tp;
523
524         /*
525          * Scan round the ports again, this time initialising.
526          */
527         pp = sc->sc_ports;
528         nmodule = 0;
529         modp = (struct si_module *)(maddr + 0x80);
530         uart_type = 1000;       /* arbitary, > uchar_max */
531         for (;;) {
532                 switch (modp->sm_type) {
533                 case TA4:
534                         nport = 4;
535                         break;
536                 case TA8:
537                         nport = 8;
538                         break;
539                 case TA4_ASIC:
540                         nport = 4;
541                         break;
542                 case TA8_ASIC:
543                         nport = 8;
544                         break;
545                 case MTA:
546                         nport = 8;
547                         break;
548                 case SXDC:
549                         nport = 8;
550                         break;
551                 default:
552                         goto try_next2;
553                 }
554                 nmodule++;
555                 ccbp = (struct si_channel *)((char *)modp + 0x100);
556                 if (uart_type == 1000)
557                         uart_type = ccbp->type;
558                 else if (uart_type != ccbp->type)
559                         printf("si%d: Warning: module %d mismatch! (%d%s != %d%s)\n",
560                             unit, nmodule,
561                             ccbp->type, si_modulename(sc->sc_type, ccbp->type),
562                             uart_type, si_modulename(sc->sc_type, uart_type));
563
564                 for (x = 0; x < nport; x++, pp++, ccbp++) {
565                         pp->sp_ccb = ccbp;      /* save the address */
566                         pp->sp_tty = tp++;
567                         pp->sp_pend = IDLE_CLOSE;
568                         pp->sp_state = 0;       /* internal flag */
569                         pp->sp_dtr_wait = 3 * hz;
570                         pp->sp_iin.c_iflag = TTYDEF_IFLAG;
571                         pp->sp_iin.c_oflag = TTYDEF_OFLAG;
572                         pp->sp_iin.c_cflag = TTYDEF_CFLAG;
573                         pp->sp_iin.c_lflag = TTYDEF_LFLAG;
574                         termioschars(&pp->sp_iin);
575                         pp->sp_iin.c_ispeed = pp->sp_iin.c_ospeed =
576                                 TTYDEF_SPEED;;
577                         pp->sp_iout = pp->sp_iin;
578                 }
579 try_next2:
580                 if (modp->sm_next == 0) {
581                         printf("si%d: card: %s, ports: %d, modules: %d, type: %d%s\n",
582                                 unit,
583                                 sc->sc_typename,
584                                 sc->sc_nport,
585                                 nmodule,
586                                 uart_type,
587                                 si_modulename(sc->sc_type, uart_type));
588                         break;
589                 }
590                 modp = (struct si_module *)
591                         (maddr + (unsigned)(modp->sm_next & 0x7fff));
592         }
593         if (done_chartimes == 0) {
594                 for (spt = chartimes ; spt->sp_speed != -1; spt++) {
595                         if ((spt->sp_code /= hz) == 0)
596                                 spt->sp_code = 1;
597                 }
598                 done_chartimes = 1;
599         }
600
601         cdevsw_add(&si_cdevsw, 0x7f, unit);
602 /*      path    name    devsw           minor   type   uid gid perm*/
603         for (x = 0; x < sc->sc_nport; x++) {
604                 /* sync with the manuals that start at 1 */
605                 y = x + 1 + unit * (1 << SI_CARDSHIFT);
606                 make_dev(&si_cdevsw, x, 0, 0, 0600, "ttyA%02d", y);
607                 make_dev(&si_cdevsw, x + 0x00080, 0, 0, 0600, "cuaA%02d", y);
608                 make_dev(&si_cdevsw, x + 0x10000, 0, 0, 0600, "ttyiA%02d", y);
609                 make_dev(&si_cdevsw, x + 0x10080, 0, 0, 0600, "cuaiA%02d", y);
610                 make_dev(&si_cdevsw, x + 0x20000, 0, 0, 0600, "ttylA%02d", y);
611                 make_dev(&si_cdevsw, x + 0x20080, 0, 0, 0600, "cualA%02d", y);
612         }
613         make_dev(&si_cdevsw, 0x40000, 0, 0, 0600, "si_control");
614         return (0);
615 }
616
617 static  int
618 siopen(dev_t dev, int flag, int mode, struct thread *td)
619 {
620         int oldspl, error;
621         int card, port;
622         struct si_softc *sc;
623         struct tty *tp;
624         volatile struct si_channel *ccbp;
625         struct si_port *pp;
626         int mynor = minor(dev);
627
628         /* quickly let in /dev/si_control */
629         if (IS_CONTROLDEV(mynor)) {
630                 if ((error = suser(td)))
631                         return(error);
632                 return(0);
633         }
634
635         card = SI_CARD(mynor);
636         sc = devclass_get_softc(si_devclass, card);
637         if (sc == NULL)
638                 return (ENXIO);
639
640         if (sc->sc_type == SIEMPTY) {
641                 DPRINT((0, DBG_OPEN|DBG_FAIL, "si%d: type %s??\n",
642                         card, sc->sc_typename));
643                 return(ENXIO);
644         }
645
646         port = SI_PORT(mynor);
647         if (port >= sc->sc_nport) {
648                 DPRINT((0, DBG_OPEN|DBG_FAIL, "si%d: nports %d\n",
649                         card, sc->sc_nport));
650                 return(ENXIO);
651         }
652
653 #ifdef  POLL
654         /*
655          * We've now got a device, so start the poller.
656          */
657         if (init_finished == 0) {
658                 callout_reset(&poll_ch, si_pollrate, si_poll, NULL);
659                 init_finished = 1;
660         }
661 #endif
662
663         /* initial/lock device */
664         if (IS_STATE(mynor)) {
665                 return(0);
666         }
667
668         pp = sc->sc_ports + port;
669         tp = pp->sp_tty;                        /* the "real" tty */
670         dev->si_tty = tp;
671         ccbp = pp->sp_ccb;                      /* Find control block */
672         DPRINT((pp, DBG_ENTRY|DBG_OPEN, "siopen(%s,%x,%x,%x)\n",
673                 devtoname(dev), flag, mode, td));
674
675         oldspl = spltty();                      /* Keep others out */
676         error = 0;
677
678 open_top:
679         while (pp->sp_state & SS_DTR_OFF) {
680                 error = tsleep(&pp->sp_dtr_wait, PCATCH, "sidtr", 0);
681                 if (error != 0)
682                         goto out;
683         }
684
685         if (tp->t_state & TS_ISOPEN) {
686                 /*
687                  * The device is open, so everything has been initialised.
688                  * handle conflicts.
689                  */
690                 if (IS_CALLOUT(mynor)) {
691                         if (!pp->sp_active_out) {
692                                 error = EBUSY;
693                                 goto out;
694                         }
695                 } else {
696                         if (pp->sp_active_out) {
697                                 if (flag & O_NONBLOCK) {
698                                         error = EBUSY;
699                                         goto out;
700                                 }
701                                 error = tsleep(&pp->sp_active_out,
702                                                 PCATCH, "sibi", 0);
703                                 if (error != 0)
704                                         goto out;
705                                 goto open_top;
706                         }
707                 }
708                 if (tp->t_state & TS_XCLUDE &&
709                     suser(td)) {
710                         DPRINT((pp, DBG_OPEN|DBG_FAIL,
711                                 "already open and EXCLUSIVE set\n"));
712                         error = EBUSY;
713                         goto out;
714                 }
715         } else {
716                 /*
717                  * The device isn't open, so there are no conflicts.
718                  * Initialize it. Avoid sleep... :-)
719                  */
720                 DPRINT((pp, DBG_OPEN, "first open\n"));
721                 tp->t_oproc = si_start;
722                 tp->t_stop = si_stop;
723                 tp->t_param = siparam;
724                 tp->t_dev = dev;
725                 tp->t_termios = mynor & SI_CALLOUT_MASK
726                                 ? pp->sp_iout : pp->sp_iin;
727
728                 (void) si_modem(pp, SET, TIOCM_DTR|TIOCM_RTS);
729
730                 ++pp->sp_wopeners;      /* in case of sleep in siparam */
731
732                 error = siparam(tp, &tp->t_termios);
733
734                 --pp->sp_wopeners;
735                 if (error != 0)
736                         goto out;
737                 /* XXX: we should goto_top if siparam slept */
738
739                 /* set initial DCD state */
740                 pp->sp_last_hi_ip = ccbp->hi_ip;
741                 if ((pp->sp_last_hi_ip & IP_DCD) || IS_CALLOUT(mynor)) {
742                         (*linesw[tp->t_line].l_modem)(tp, 1);
743                 }
744         }
745
746         /* whoops! we beat the close! */
747         if (pp->sp_state & SS_CLOSING) {
748                 /* try and stop it from proceeding to bash the hardware */
749                 pp->sp_state &= ~SS_CLOSING;
750         }
751
752         /*
753          * Wait for DCD if necessary
754          */
755         if (!(tp->t_state & TS_CARR_ON) &&
756             !IS_CALLOUT(mynor) &&
757             !(tp->t_cflag & CLOCAL) &&
758             !(flag & O_NONBLOCK)) {
759                 ++pp->sp_wopeners;
760                 DPRINT((pp, DBG_OPEN, "sleeping for carrier\n"));
761                 error = tsleep(TSA_CARR_ON(tp), PCATCH, "sidcd", 0);
762                 --pp->sp_wopeners;
763                 if (error != 0)
764                         goto out;
765                 goto open_top;
766         }
767
768         error = (*linesw[tp->t_line].l_open)(dev, tp);
769         si_disc_optim(tp, &tp->t_termios, pp);
770         if (tp->t_state & TS_ISOPEN && IS_CALLOUT(mynor))
771                 pp->sp_active_out = TRUE;
772
773         pp->sp_state |= SS_OPEN;        /* made it! */
774
775 out:
776         splx(oldspl);
777
778         DPRINT((pp, DBG_OPEN, "leaving siopen\n"));
779
780         if (!(tp->t_state & TS_ISOPEN) && pp->sp_wopeners == 0)
781                 sihardclose(pp);
782
783         return(error);
784 }
785
786 static  int
787 siclose(dev_t dev, int flag, int mode, struct thread *td)
788 {
789         struct si_port *pp;
790         struct tty *tp;
791         int oldspl;
792         int error = 0;
793         int mynor = minor(dev);
794
795         if (IS_SPECIAL(mynor))
796                 return(0);
797
798         oldspl = spltty();
799
800         pp = MINOR2PP(mynor);
801         tp = pp->sp_tty;
802
803         DPRINT((pp, DBG_ENTRY|DBG_CLOSE, "siclose(%s,%x,%x,%x) sp_state:%x\n",
804                 devtoname(dev), flag, mode, td, pp->sp_state));
805
806         /* did we sleep and loose a race? */
807         if (pp->sp_state & SS_CLOSING) {
808                 /* error = ESOMETING? */
809                 goto out;
810         }
811
812         /* begin race detection.. */
813         pp->sp_state |= SS_CLOSING;
814
815         si_write_enable(pp, 0);         /* block writes for ttywait() */
816
817         /* THIS MAY SLEEP IN TTYWAIT!!! */
818         (*linesw[tp->t_line].l_close)(tp, flag);
819
820         si_write_enable(pp, 1);
821
822         /* did we sleep and somebody started another open? */
823         if (!(pp->sp_state & SS_CLOSING)) {
824                 /* error = ESOMETING? */
825                 goto out;
826         }
827         /* ok. we are now still on the right track.. nuke the hardware */
828
829         if (pp->sp_state & SS_LSTART) {
830                 callout_stop(&pp->lstart_ch);
831                 pp->sp_state &= ~SS_LSTART;
832         }
833
834         si_stop(tp, FREAD | FWRITE);
835
836         sihardclose(pp);
837         ttyclose(tp);
838         pp->sp_state &= ~SS_OPEN;
839
840 out:
841         DPRINT((pp, DBG_CLOSE|DBG_EXIT, "close done, returning\n"));
842         splx(oldspl);
843         return(error);
844 }
845
846 static void
847 sihardclose(struct si_port *pp)
848 {
849         int oldspl;
850         struct tty *tp;
851         volatile struct si_channel *ccbp;
852
853         oldspl = spltty();
854
855         tp = pp->sp_tty;
856         ccbp = pp->sp_ccb;                      /* Find control block */
857         if (tp->t_cflag & HUPCL ||
858             (!pp->sp_active_out &&
859              !(ccbp->hi_ip & IP_DCD) &&
860              !(pp->sp_iin.c_cflag && CLOCAL)) ||
861             !(tp->t_state & TS_ISOPEN)) {
862
863                 (void) si_modem(pp, BIC, TIOCM_DTR|TIOCM_RTS);
864                 (void) si_command(pp, FCLOSE, SI_NOWAIT);
865
866                 if (pp->sp_dtr_wait != 0) {
867                         callout_reset(&pp->dtr_ch, pp->sp_dtr_wait,
868                                         sidtrwakeup, pp);
869                         pp->sp_state |= SS_DTR_OFF;
870                 }
871
872         }
873         pp->sp_active_out = FALSE;
874         wakeup((caddr_t)&pp->sp_active_out);
875         wakeup(TSA_CARR_ON(tp));
876
877         splx(oldspl);
878 }
879
880
881 /*
882  * called at splsoftclock()...
883  */
884 static void
885 sidtrwakeup(void *chan)
886 {
887         struct si_port *pp;
888         int oldspl;
889
890         oldspl = spltty();
891
892         pp = (struct si_port *)chan;
893         pp->sp_state &= ~SS_DTR_OFF;
894         wakeup(&pp->sp_dtr_wait);
895
896         splx(oldspl);
897 }
898
899 static  int
900 siwrite(dev_t dev, struct uio *uio, int flag)
901 {
902         struct si_port *pp;
903         struct tty *tp;
904         int error = 0;
905         int mynor = minor(dev);
906         int oldspl;
907
908         if (IS_SPECIAL(mynor)) {
909                 DPRINT((0, DBG_ENTRY|DBG_FAIL|DBG_WRITE, "siwrite(CONTROLDEV!!)\n"));
910                 return(ENODEV);
911         }
912         pp = MINOR2PP(mynor);
913         tp = pp->sp_tty;
914         DPRINT((pp, DBG_WRITE, "siwrite(%s,%x,%x)\n", devtoname(dev), uio, flag));
915
916         oldspl = spltty();
917         /*
918          * If writes are currently blocked, wait on the "real" tty
919          */
920         while (pp->sp_state & SS_BLOCKWRITE) {
921                 pp->sp_state |= SS_WAITWRITE;
922                 DPRINT((pp, DBG_WRITE, "in siwrite, wait for SS_BLOCKWRITE to clear\n"));
923                 if ((error = ttysleep(tp, (caddr_t)pp, PCATCH,
924                                      "siwrite", tp->t_timeout))) {
925                         if (error == EWOULDBLOCK)
926                                 error = EIO;
927                         goto out;
928                 }
929         }
930
931         error = (*linesw[tp->t_line].l_write)(tp, uio, flag);
932 out:
933         splx(oldspl);
934         return (error);
935 }
936
937
938 static  int
939 siioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
940 {
941         struct si_port *pp;
942         struct tty *tp;
943         int error;
944         int mynor = minor(dev);
945         int oldspl;
946         int blocked = 0;
947 #if defined(COMPAT_43)
948         u_long oldcmd;
949         struct termios term;
950 #endif
951
952         if (IS_SI_IOCTL(cmd))
953                 return(si_Sioctl(dev, cmd, data, flag, td));
954
955         pp = MINOR2PP(mynor);
956         tp = pp->sp_tty;
957
958         DPRINT((pp, DBG_ENTRY|DBG_IOCTL, "siioctl(%s,%lx,%x,%x)\n",
959                 devtoname(dev), cmd, data, flag));
960         if (IS_STATE(mynor)) {
961                 struct termios *ct;
962
963                 switch (mynor & SI_STATE_MASK) {
964                 case SI_INIT_STATE_MASK:
965                         ct = IS_CALLOUT(mynor) ? &pp->sp_iout : &pp->sp_iin;
966                         break;
967                 case SI_LOCK_STATE_MASK:
968                         ct = IS_CALLOUT(mynor) ? &pp->sp_lout : &pp->sp_lin;
969                         break;
970                 default:
971                         return (ENODEV);
972                 }
973                 switch (cmd) {
974                 case TIOCSETA:
975                         error = suser(td);
976                         if (error != 0)
977                                 return (error);
978                         *ct = *(struct termios *)data;
979                         return (0);
980                 case TIOCGETA:
981                         *(struct termios *)data = *ct;
982                         return (0);
983                 case TIOCGETD:
984                         *(int *)data = TTYDISC;
985                         return (0);
986                 case TIOCGWINSZ:
987                         bzero(data, sizeof(struct winsize));
988                         return (0);
989                 default:
990                         return (ENOTTY);
991                 }
992         }
993         /*
994          * Do the old-style ioctl compat routines...
995          */
996 #if defined(COMPAT_43)
997         term = tp->t_termios;
998         oldcmd = cmd;
999         error = ttsetcompat(tp, &cmd, data, &term);
1000         if (error != 0)
1001                 return (error);
1002         if (cmd != oldcmd)
1003                 data = (caddr_t)&term;
1004 #endif
1005         /*
1006          * Do the initial / lock state business
1007          */
1008         if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) {
1009                 int     cc;
1010                 struct termios *dt = (struct termios *)data;
1011                 struct termios *lt = mynor & SI_CALLOUT_MASK
1012                                      ? &pp->sp_lout : &pp->sp_lin;
1013
1014                 dt->c_iflag = (tp->t_iflag & lt->c_iflag) |
1015                         (dt->c_iflag & ~lt->c_iflag);
1016                 dt->c_oflag = (tp->t_oflag & lt->c_oflag) |
1017                         (dt->c_oflag & ~lt->c_oflag);
1018                 dt->c_cflag = (tp->t_cflag & lt->c_cflag) |
1019                         (dt->c_cflag & ~lt->c_cflag);
1020                 dt->c_lflag = (tp->t_lflag & lt->c_lflag) |
1021                         (dt->c_lflag & ~lt->c_lflag);
1022                 for (cc = 0; cc < NCCS; ++cc)
1023                         if (lt->c_cc[cc] != 0)
1024                                 dt->c_cc[cc] = tp->t_cc[cc];
1025                 if (lt->c_ispeed != 0)
1026                         dt->c_ispeed = tp->t_ispeed;
1027                 if (lt->c_ospeed != 0)
1028                         dt->c_ospeed = tp->t_ospeed;
1029         }
1030
1031         /*
1032          * Block user-level writes to give the ttywait()
1033          * a chance to completely drain for commands
1034          * that require the port to be in a quiescent state.
1035          */
1036         switch (cmd) {
1037         case TIOCSETAW:
1038         case TIOCSETAF:
1039         case TIOCDRAIN:
1040 #ifdef COMPAT_43
1041         case TIOCSETP:
1042 #endif
1043                 blocked++;      /* block writes for ttywait() and siparam() */
1044                 si_write_enable(pp, 0);
1045         }
1046
1047         error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, td);
1048         if (error != ENOIOCTL)
1049                 goto out;
1050
1051         oldspl = spltty();
1052
1053         error = ttioctl(tp, cmd, data, flag);
1054         si_disc_optim(tp, &tp->t_termios, pp);
1055         if (error != ENOIOCTL) {
1056                 splx(oldspl);
1057                 goto out;
1058         }
1059
1060         error = 0;
1061         switch (cmd) {
1062         case TIOCSBRK:
1063                 si_command(pp, SBREAK, SI_WAIT);
1064                 break;
1065         case TIOCCBRK:
1066                 si_command(pp, EBREAK, SI_WAIT);
1067                 break;
1068         case TIOCSDTR:
1069                 (void) si_modem(pp, SET, TIOCM_DTR|TIOCM_RTS);
1070                 break;
1071         case TIOCCDTR:
1072                 (void) si_modem(pp, SET, 0);
1073                 break;
1074         case TIOCMSET:
1075                 (void) si_modem(pp, SET, *(int *)data);
1076                 break;
1077         case TIOCMBIS:
1078                 (void) si_modem(pp, BIS, *(int *)data);
1079                 break;
1080         case TIOCMBIC:
1081                 (void) si_modem(pp, BIC, *(int *)data);
1082                 break;
1083         case TIOCMGET:
1084                 *(int *)data = si_modem(pp, GET, 0);
1085                 break;
1086         case TIOCMSDTRWAIT:
1087                 /* must be root since the wait applies to following logins */
1088                 error = suser(td);
1089                 if (error == 0)
1090                         pp->sp_dtr_wait = *(int *)data * hz / 100;
1091                 break;
1092         case TIOCMGDTRWAIT:
1093                 *(int *)data = pp->sp_dtr_wait * 100 / hz;
1094                 break;
1095         default:
1096                 error = ENOTTY;
1097         }
1098         splx(oldspl);
1099
1100 out:
1101         DPRINT((pp, DBG_IOCTL|DBG_EXIT, "siioctl ret %d\n", error));
1102         if (blocked)
1103                 si_write_enable(pp, 1);
1104         return(error);
1105 }
1106
1107 /*
1108  * Handle the Specialix ioctls. All MUST be called via the CONTROL device
1109  */
1110 static int
1111 si_Sioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1112 {
1113         struct si_softc *xsc;
1114         struct si_port *xpp;
1115         volatile struct si_reg *regp;
1116         struct si_tcsi *dp;
1117         struct si_pstat *sps;
1118         int *ip, error = 0;
1119         int oldspl;
1120         int card, port;
1121         int mynor = minor(dev);
1122
1123         DPRINT((0, DBG_ENTRY|DBG_IOCTL, "si_Sioctl(%s,%lx,%x,%x)\n",
1124                 devtoname(dev), cmd, data, flag));
1125
1126 #if 1
1127         DPRINT((0, DBG_IOCTL, "TCSI_PORT=%x\n", TCSI_PORT));
1128         DPRINT((0, DBG_IOCTL, "TCSI_CCB=%x\n", TCSI_CCB));
1129         DPRINT((0, DBG_IOCTL, "TCSI_TTY=%x\n", TCSI_TTY));
1130 #endif
1131
1132         if (!IS_CONTROLDEV(mynor)) {
1133                 DPRINT((0, DBG_IOCTL|DBG_FAIL, "not called from control device!\n"));
1134                 return(ENODEV);
1135         }
1136
1137         oldspl = spltty();      /* better safe than sorry */
1138
1139         ip = (int *)data;
1140
1141 #define SUCHECK if ((error = suser(td))) goto out
1142
1143         switch (cmd) {
1144         case TCSIPORTS:
1145                 *ip = si_Nports;
1146                 goto out;
1147         case TCSIMODULES:
1148                 *ip = si_Nmodules;
1149                 goto out;
1150         case TCSISDBG_ALL:
1151                 SUCHECK;
1152                 si_debug = *ip;
1153                 goto out;
1154         case TCSIGDBG_ALL:
1155                 *ip = si_debug;
1156                 goto out;
1157         default:
1158                 /*
1159                  * Check that a controller for this port exists
1160                  */
1161
1162                 /* may also be a struct si_pstat, a superset of si_tcsi */
1163
1164                 dp = (struct si_tcsi *)data;
1165                 sps = (struct si_pstat *)data;
1166                 card = dp->tc_card;
1167                 xsc = devclass_get_softc(si_devclass, card);    /* check.. */
1168                 if (xsc == NULL || xsc->sc_type == SIEMPTY) {
1169                         error = ENOENT;
1170                         goto out;
1171                 }
1172                 /*
1173                  * And check that a port exists
1174                  */
1175                 port = dp->tc_port;
1176                 if (port < 0 || port >= xsc->sc_nport) {
1177                         error = ENOENT;
1178                         goto out;
1179                 }
1180                 xpp = xsc->sc_ports + port;
1181                 regp = (struct si_reg *)xsc->sc_maddr;
1182         }
1183
1184         switch (cmd) {
1185         case TCSIDEBUG:
1186 #ifdef  SI_DEBUG
1187                 SUCHECK;
1188                 if (xpp->sp_debug)
1189                         xpp->sp_debug = 0;
1190                 else {
1191                         xpp->sp_debug = DBG_ALL;
1192                         DPRINT((xpp, DBG_IOCTL, "debug toggled %s\n",
1193                                 (xpp->sp_debug&DBG_ALL)?"ON":"OFF"));
1194                 }
1195                 break;
1196 #else
1197                 error = ENODEV;
1198                 goto out;
1199 #endif
1200         case TCSISDBG_LEVEL:
1201         case TCSIGDBG_LEVEL:
1202 #ifdef  SI_DEBUG
1203                 if (cmd == TCSIGDBG_LEVEL) {
1204                         dp->tc_dbglvl = xpp->sp_debug;
1205                 } else {
1206                         SUCHECK;
1207                         xpp->sp_debug = dp->tc_dbglvl;
1208                 }
1209                 break;
1210 #else
1211                 error = ENODEV;
1212                 goto out;
1213 #endif
1214         case TCSIGRXIT:
1215                 dp->tc_int = regp->rx_int_count;
1216                 break;
1217         case TCSIRXIT:
1218                 SUCHECK;
1219                 regp->rx_int_count = dp->tc_int;
1220                 break;
1221         case TCSIGIT:
1222                 dp->tc_int = regp->int_count;
1223                 break;
1224         case TCSIIT:
1225                 SUCHECK;
1226                 regp->int_count = dp->tc_int;
1227                 break;
1228         case TCSISTATE:
1229                 dp->tc_int = xpp->sp_ccb->hi_ip;
1230                 break;
1231         /* these next three use a different structure */
1232         case TCSI_PORT:
1233                 SUCHECK;
1234                 si_bcopy(xpp, &sps->tc_siport, sizeof(sps->tc_siport));
1235                 break;
1236         case TCSI_CCB:
1237                 SUCHECK;
1238                 si_vbcopy(xpp->sp_ccb, &sps->tc_ccb, sizeof(sps->tc_ccb));
1239                 break;
1240         case TCSI_TTY:
1241                 SUCHECK;
1242                 si_bcopy(xpp->sp_tty, &sps->tc_tty, sizeof(sps->tc_tty));
1243                 break;
1244         default:
1245                 error = EINVAL;
1246                 goto out;
1247         }
1248 out:
1249         splx(oldspl);
1250         return(error);          /* success */
1251 }
1252
1253 /*
1254  *      siparam()       : Configure line params
1255  *      called at spltty();
1256  *      this may sleep, does not flush, nor wait for drain, nor block writes
1257  *      caller must arrange this if it's important..
1258  */
1259 static int
1260 siparam(struct tty *tp, struct termios *t)
1261 {
1262         struct si_port *pp = TP2PP(tp);
1263         volatile struct si_channel *ccbp;
1264         int oldspl, cflag, iflag, oflag, lflag;
1265         int error = 0;          /* shutup gcc */
1266         int ispeed = 0;         /* shutup gcc */
1267         int ospeed = 0;         /* shutup gcc */
1268         BYTE val;
1269
1270         DPRINT((pp, DBG_ENTRY|DBG_PARAM, "siparam(%x,%x)\n", tp, t));
1271         cflag = t->c_cflag;
1272         iflag = t->c_iflag;
1273         oflag = t->c_oflag;
1274         lflag = t->c_lflag;
1275         DPRINT((pp, DBG_PARAM, "OFLAG 0x%x CFLAG 0x%x IFLAG 0x%x LFLAG 0x%x\n",
1276                 oflag, cflag, iflag, lflag));
1277
1278         /* XXX - if Jet host and SXDC module, use extended baud rates */
1279
1280         /* if not hung up.. */
1281         if (t->c_ospeed != 0) {
1282                 /* translate baud rate to firmware values */
1283                 ospeed = ttspeedtab(t->c_ospeed, bdrates);
1284                 ispeed = t->c_ispeed ?
1285                          ttspeedtab(t->c_ispeed, bdrates) : ospeed;
1286
1287                 /* enforce legit baud rate */
1288                 if (ospeed < 0 || ispeed < 0)
1289                         return (EINVAL);
1290         }
1291
1292         oldspl = spltty();
1293
1294         ccbp = pp->sp_ccb;
1295
1296         /* ========== set hi_break ========== */
1297         val = 0;
1298         if (iflag & IGNBRK)             /* Breaks */
1299                 val |= BR_IGN;
1300         if (iflag & BRKINT)             /* Interrupt on break? */
1301                 val |= BR_INT;
1302         if (iflag & PARMRK)             /* Parity mark? */
1303                 val |= BR_PARMRK;
1304         if (iflag & IGNPAR)             /* Ignore chars with parity errors? */
1305                 val |= BR_PARIGN;
1306         ccbp->hi_break = val;
1307
1308         /* ========== set hi_csr ========== */
1309         /* if not hung up.. */
1310         if (t->c_ospeed != 0) {
1311                 /* Set I/O speeds */
1312                  val = (ispeed << 4) | ospeed;
1313         }
1314         ccbp->hi_csr = val;
1315
1316         /* ========== set hi_mr2 ========== */
1317         val = 0;
1318         if (cflag & CSTOPB)                             /* Stop bits */
1319                 val |= MR2_2_STOP;
1320         else
1321                 val |= MR2_1_STOP;
1322         /*
1323          * Enable H/W RTS/CTS handshaking. The default TA/MTA is
1324          * a DCE, hence the reverse sense of RTS and CTS
1325          */
1326         /* Output Flow - RTS must be raised before data can be sent */
1327         if (cflag & CCTS_OFLOW)
1328                 val |= MR2_RTSCONT;
1329
1330         ccbp->hi_mr2 = val;
1331
1332         /* ========== set hi_mr1 ========== */
1333         val = 0;
1334         if (!(cflag & PARENB))                          /* Parity */
1335                 val |= MR1_NONE;
1336         else
1337                 val |= MR1_WITH;
1338         if (cflag & PARODD)
1339                 val |= MR1_ODD;
1340
1341         if ((cflag & CS8) == CS8) {                     /* 8 data bits? */
1342                 val |= MR1_8_BITS;
1343         } else if ((cflag & CS7) == CS7) {              /* 7 data bits? */
1344                 val |= MR1_7_BITS;
1345         } else if ((cflag & CS6) == CS6) {              /* 6 data bits? */
1346                 val |= MR1_6_BITS;
1347         } else {                                        /* Must be 5 */
1348                 val |= MR1_5_BITS;
1349         }
1350         /*
1351          * Enable H/W RTS/CTS handshaking. The default TA/MTA is
1352          * a DCE, hence the reverse sense of RTS and CTS
1353          */
1354         /* Input Flow - CTS is raised when port is ready to receive data */
1355         if (cflag & CRTS_IFLOW)
1356                 val |= MR1_CTSCONT;
1357
1358         ccbp->hi_mr1 = val;
1359
1360         /* ========== set hi_mask ========== */
1361         val = 0xff;
1362         if ((cflag & CS8) == CS8) {                     /* 8 data bits? */
1363                 val &= 0xFF;
1364         } else if ((cflag & CS7) == CS7) {              /* 7 data bits? */
1365                 val &= 0x7F;
1366         } else if ((cflag & CS6) == CS6) {              /* 6 data bits? */
1367                 val &= 0x3F;
1368         } else {                                        /* Must be 5 */
1369                 val &= 0x1F;
1370         }
1371         if (iflag & ISTRIP)
1372                 val &= 0x7F;
1373
1374         ccbp->hi_mask = val;
1375
1376         /* ========== set hi_prtcl ========== */
1377         val = SP_DCEN;          /* Monitor DCD always, or TIOCMGET misses it */
1378         if (iflag & IXANY)
1379                 val |= SP_TANY;
1380         if (iflag & IXON)
1381                 val |= SP_TXEN;
1382         if (iflag & IXOFF)
1383                 val |= SP_RXEN;
1384         if (iflag & INPCK)
1385                 val |= SP_PAEN;
1386
1387         ccbp->hi_prtcl = val;
1388
1389
1390         /* ========== set hi_{rx|tx}{on|off} ========== */
1391         /* XXX: the card TOTALLY shields us from the flow control... */
1392         ccbp->hi_txon = t->c_cc[VSTART];
1393         ccbp->hi_txoff = t->c_cc[VSTOP];
1394
1395         ccbp->hi_rxon = t->c_cc[VSTART];
1396         ccbp->hi_rxoff = t->c_cc[VSTOP];
1397
1398         /* ========== send settings to the card ========== */
1399         /* potential sleep here */
1400         if (ccbp->hi_stat == IDLE_CLOSE)                /* Not yet open */
1401                 si_command(pp, LOPEN, SI_WAIT);         /* open it */
1402         else
1403                 si_command(pp, CONFIG, SI_WAIT);        /* change params */
1404
1405         /* ========== set DTR etc ========== */
1406         /* Hangup if ospeed == 0 */
1407         if (t->c_ospeed == 0) {
1408                 (void) si_modem(pp, BIC, TIOCM_DTR|TIOCM_RTS);
1409         } else {
1410                 /*
1411                  * If the previous speed was 0, may need to re-enable
1412                  * the modem signals
1413                  */
1414                 (void) si_modem(pp, SET, TIOCM_DTR|TIOCM_RTS);
1415         }
1416
1417         DPRINT((pp, DBG_PARAM, "siparam, complete: MR1 %x MR2 %x HI_MASK %x PRTCL %x HI_BREAK %x\n",
1418                 ccbp->hi_mr1, ccbp->hi_mr2, ccbp->hi_mask, ccbp->hi_prtcl, ccbp->hi_break));
1419
1420         splx(oldspl);
1421         return(error);
1422 }
1423
1424 /*
1425  * Enable or Disable the writes to this channel...
1426  * "state" ->  enabled = 1; disabled = 0;
1427  */
1428 static void
1429 si_write_enable(struct si_port *pp, int state)
1430 {
1431         int oldspl;
1432
1433         oldspl = spltty();
1434
1435         if (state) {
1436                 pp->sp_state &= ~SS_BLOCKWRITE;
1437                 if (pp->sp_state & SS_WAITWRITE) {
1438                         pp->sp_state &= ~SS_WAITWRITE;
1439                         /* thunder away! */
1440                         wakeup((caddr_t)pp);
1441                 }
1442         } else {
1443                 pp->sp_state |= SS_BLOCKWRITE;
1444         }
1445
1446         splx(oldspl);
1447 }
1448
1449 /*
1450  * Set/Get state of modem control lines.
1451  * Due to DCE-like behaviour of the adapter, some signals need translation:
1452  *      TIOCM_DTR       DSR
1453  *      TIOCM_RTS       CTS
1454  */
1455 static int
1456 si_modem(struct si_port *pp, enum si_mctl cmd, int bits)
1457 {
1458         volatile struct si_channel *ccbp;
1459         int x;
1460
1461         DPRINT((pp, DBG_ENTRY|DBG_MODEM, "si_modem(%x,%s,%x)\n", pp, si_mctl2str(cmd), bits));
1462         ccbp = pp->sp_ccb;              /* Find channel address */
1463         switch (cmd) {
1464         case GET:
1465                 x = ccbp->hi_ip;
1466                 bits = TIOCM_LE;
1467                 if (x & IP_DCD)         bits |= TIOCM_CAR;
1468                 if (x & IP_DTR)         bits |= TIOCM_DTR;
1469                 if (x & IP_RTS)         bits |= TIOCM_RTS;
1470                 if (x & IP_RI)          bits |= TIOCM_RI;
1471                 return(bits);
1472         case SET:
1473                 ccbp->hi_op &= ~(OP_DSR|OP_CTS);
1474                 /* fall through */
1475         case BIS:
1476                 x = 0;
1477                 if (bits & TIOCM_DTR)
1478                         x |= OP_DSR;
1479                 if (bits & TIOCM_RTS)
1480                         x |= OP_CTS;
1481                 ccbp->hi_op |= x;
1482                 break;
1483         case BIC:
1484                 if (bits & TIOCM_DTR)
1485                         ccbp->hi_op &= ~OP_DSR;
1486                 if (bits & TIOCM_RTS)
1487                         ccbp->hi_op &= ~OP_CTS;
1488         }
1489         return 0;
1490 }
1491
1492 /*
1493  * Handle change of modem state
1494  */
1495 static void
1496 si_modem_state(struct si_port *pp, struct tty *tp, int hi_ip)
1497 {
1498                                                         /* if a modem dev */
1499         if (hi_ip & IP_DCD) {
1500                 if (!(pp->sp_last_hi_ip & IP_DCD)) {
1501                         DPRINT((pp, DBG_INTR, "modem carr on t_line %d\n",
1502                                 tp->t_line));
1503                         (void)(*linesw[tp->t_line].l_modem)(tp, 1);
1504                 }
1505         } else {
1506                 if (pp->sp_last_hi_ip & IP_DCD) {
1507                         DPRINT((pp, DBG_INTR, "modem carr off\n"));
1508                         if ((*linesw[tp->t_line].l_modem)(tp, 0))
1509                                 (void) si_modem(pp, SET, 0);
1510                 }
1511         }
1512         pp->sp_last_hi_ip = hi_ip;
1513
1514 }
1515
1516 /*
1517  * Poller to catch missed interrupts.
1518  *
1519  * Note that the SYSV Specialix drivers poll at 100 times per second to get
1520  * better response.  We could really use a "periodic" version timeout(). :-)
1521  */
1522 #ifdef POLL
1523 static void
1524 si_poll(void *nothing)
1525 {
1526         struct si_softc *sc;
1527         int i;
1528         volatile struct si_reg *regp;
1529         struct si_port *pp;
1530         int lost, oldspl, port;
1531
1532         DPRINT((0, DBG_POLL, "si_poll()\n"));
1533         oldspl = spltty();
1534         if (in_intr)
1535                 goto out;
1536         lost = 0;
1537         for (i = 0; i < si_numunits; i++) {
1538                 sc = devclass_get_softc(si_devclass, i);
1539                 if (sc == NULL || sc->sc_type == SIEMPTY)
1540                         continue;
1541                 regp = (struct si_reg *)sc->sc_maddr;
1542
1543                 /*
1544                  * See if there has been a pending interrupt for 2 seconds
1545                  * or so. The test (int_scounter >= 200) won't correspond
1546                  * to 2 seconds if int_count gets changed.
1547                  */
1548                 if (regp->int_pending != 0) {
1549                         if (regp->int_scounter >= 200 &&
1550                             regp->initstat == 1) {
1551                                 printf("si%d: lost intr\n", i);
1552                                 lost++;
1553                         }
1554                 } else {
1555                         regp->int_scounter = 0;
1556                 }
1557
1558                 /*
1559                  * gripe about no input flow control..
1560                  */
1561                 pp = sc->sc_ports;
1562                 for (port = 0; port < sc->sc_nport; pp++, port++) {
1563                         if (pp->sp_delta_overflows > 0) {
1564                                 printf("si%d: %d tty level buffer overflows\n",
1565                                         i, pp->sp_delta_overflows);
1566                                 pp->sp_delta_overflows = 0;
1567                         }
1568                 }
1569         }
1570         if (lost || si_realpoll)
1571                 si_intr(NULL);  /* call intr with fake vector */
1572 out:
1573         splx(oldspl);
1574
1575         callout_reset(&poll_ch, si_pollrate, si_poll, NULL);
1576 }
1577 #endif  /* ifdef POLL */
1578
1579 /*
1580  * The interrupt handler polls ALL ports on ALL adapters each time
1581  * it is called.
1582  */
1583
1584 static BYTE si_rxbuf[SI_BUFFERSIZE];    /* input staging area */
1585 static BYTE si_txbuf[SI_BUFFERSIZE];    /* output staging area */
1586
1587 void
1588 si_intr(void *arg)
1589 {
1590         struct si_softc *sc;
1591         struct si_port *pp;
1592         volatile struct si_channel *ccbp;
1593         struct tty *tp;
1594         volatile caddr_t maddr;
1595         BYTE op, ip;
1596         int x, card, port, n, i, isopen;
1597         volatile BYTE *z;
1598         BYTE c;
1599
1600         sc = arg;
1601
1602         DPRINT((0, arg == NULL ? DBG_POLL:DBG_INTR, "si_intr\n"));
1603         if (in_intr)
1604                 return;
1605         in_intr = 1;
1606
1607         /*
1608          * When we get an int we poll all the channels and do ALL pending
1609          * work, not just the first one we find. This allows all cards to
1610          * share the same vector.
1611          *
1612          * XXX - But if we're sharing the vector with something that's NOT
1613          * a SI/XIO/SX card, we may be making more work for ourselves.
1614          */
1615         for (card = 0; card < si_numunits; card++) {
1616                 sc = devclass_get_softc(si_devclass, card);
1617                 if (sc == NULL || sc->sc_type == SIEMPTY)
1618                         continue;
1619
1620                 /*
1621                  * First, clear the interrupt
1622                  */
1623                 switch(sc->sc_type) {
1624                 case SIHOST:
1625                         maddr = sc->sc_maddr;
1626                         ((volatile struct si_reg *)maddr)->int_pending = 0;
1627                                                         /* flag nothing pending */
1628                         *(maddr+SIINTCL) = 0x00;        /* Set IRQ clear */
1629                         *(maddr+SIINTCL_CL) = 0x00;     /* Clear IRQ clear */
1630                         break;
1631                 case SIHOST2:
1632                         maddr = sc->sc_maddr;
1633                         ((volatile struct si_reg *)maddr)->int_pending = 0;
1634                         *(maddr+SIPLIRQCLR) = 0x00;
1635                         *(maddr+SIPLIRQCLR) = 0x10;
1636                         break;
1637                 case SIPCI:
1638                         maddr = sc->sc_maddr;
1639                         ((volatile struct si_reg *)maddr)->int_pending = 0;
1640                         *(maddr+SIPCIINTCL) = 0x0;
1641                         break;
1642                 case SIJETPCI:  /* fall through to JETISA case */
1643                 case SIJETISA:
1644                         maddr = sc->sc_maddr;
1645                         ((volatile struct si_reg *)maddr)->int_pending = 0;
1646                         *(maddr+SIJETINTCL) = 0x0;
1647                         break;
1648                 case SIEISA:
1649                         maddr = sc->sc_maddr;
1650                         ((volatile struct si_reg *)maddr)->int_pending = 0;
1651                         (void)inb(sc->sc_iobase + 3);
1652                         break;
1653                 case SIEMPTY:
1654                 default:
1655                         continue;
1656                 }
1657                 ((volatile struct si_reg *)maddr)->int_scounter = 0;
1658
1659                 /*
1660                  * check each port
1661                  */
1662                 for (pp = sc->sc_ports, port = 0; port < sc->sc_nport;
1663                      pp++, port++) {
1664                         ccbp = pp->sp_ccb;
1665                         tp = pp->sp_tty;
1666
1667                         /*
1668                          * See if a command has completed ?
1669                          */
1670                         if (ccbp->hi_stat != pp->sp_pend) {
1671                                 DPRINT((pp, DBG_INTR,
1672                                         "si_intr hi_stat = 0x%x, pend = %d\n",
1673                                         ccbp->hi_stat, pp->sp_pend));
1674                                 switch(pp->sp_pend) {
1675                                 case LOPEN:
1676                                 case MPEND:
1677                                 case MOPEN:
1678                                 case CONFIG:
1679                                 case SBREAK:
1680                                 case EBREAK:
1681                                         pp->sp_pend = ccbp->hi_stat;
1682                                                 /* sleeping in si_command */
1683                                         wakeup(&pp->sp_state);
1684                                         break;
1685                                 default:
1686                                         pp->sp_pend = ccbp->hi_stat;
1687                                 }
1688                         }
1689
1690                         /*
1691                          * Continue on if it's closed
1692                          */
1693                         if (ccbp->hi_stat == IDLE_CLOSE) {
1694                                 continue;
1695                         }
1696
1697                         /*
1698                          * Do modem state change if not a local device
1699                          */
1700                         si_modem_state(pp, tp, ccbp->hi_ip);
1701
1702                         /*
1703                          * Check to see if we should 'receive' characters.
1704                          */
1705                         if (tp->t_state & TS_CONNECTED &&
1706                             tp->t_state & TS_ISOPEN)
1707                                 isopen = 1;
1708                         else
1709                                 isopen = 0;
1710
1711                         /*
1712                          * Do input break processing
1713                          */
1714                         if (ccbp->hi_state & ST_BREAK) {
1715                                 if (isopen) {
1716                                     (*linesw[tp->t_line].l_rint)(TTY_BI, tp);
1717                                 }
1718                                 ccbp->hi_state &= ~ST_BREAK;   /* A Bit iffy this */
1719                                 DPRINT((pp, DBG_INTR, "si_intr break\n"));
1720                         }
1721
1722                         /*
1723                          * Do RX stuff - if not open then dump any characters.
1724                          * XXX: This is VERY messy and needs to be cleaned up.
1725                          *
1726                          * XXX: can we leave data in the host adapter buffer
1727                          * when the clists are full?  That may be dangerous
1728                          * if the user cannot get an interrupt signal through.
1729                          */
1730
1731         more_rx:        /* XXX Sorry. the nesting was driving me bats! :-( */
1732
1733                         if (!isopen) {
1734                                 ccbp->hi_rxopos = ccbp->hi_rxipos;
1735                                 goto end_rx;
1736                         }
1737
1738                         /*
1739                          * If the tty input buffers are blocked, stop emptying
1740                          * the incoming buffers and let the auto flow control
1741                          * assert..
1742                          */
1743                         if (tp->t_state & TS_TBLOCK) {
1744                                 goto end_rx;
1745                         }
1746
1747                         /*
1748                          * Process read characters if not skipped above
1749                          */
1750                         op = ccbp->hi_rxopos;
1751                         ip = ccbp->hi_rxipos;
1752                         c = ip - op;
1753                         if (c == 0) {
1754                                 goto end_rx;
1755                         }
1756
1757                         n = c & 0xff;
1758                         if (n > 250)
1759                                 n = 250;
1760
1761                         DPRINT((pp, DBG_INTR, "n = %d, op = %d, ip = %d\n",
1762                                                 n, op, ip));
1763
1764                         /*
1765                          * Suck characters out of host card buffer into the
1766                          * "input staging buffer" - so that we dont leave the
1767                          * host card in limbo while we're possibly echoing
1768                          * characters and possibly flushing input inside the
1769                          * ldisc l_rint() routine.
1770                          */
1771                         if (n <= SI_BUFFERSIZE - op) {
1772
1773                                 DPRINT((pp, DBG_INTR, "\tsingle copy\n"));
1774                                 z = ccbp->hi_rxbuf + op;
1775                                 si_vbcopy(z, si_rxbuf, n);
1776
1777                                 op += n;
1778                         } else {
1779                                 x = SI_BUFFERSIZE - op;
1780
1781                                 DPRINT((pp, DBG_INTR, "\tdouble part 1 %d\n", x));
1782                                 z = ccbp->hi_rxbuf + op;
1783                                 si_vbcopy(z, si_rxbuf, x);
1784
1785                                 DPRINT((pp, DBG_INTR, "\tdouble part 2 %d\n",
1786                                         n - x));
1787                                 z = ccbp->hi_rxbuf;
1788                                 si_vbcopy(z, si_rxbuf + x, n - x);
1789
1790                                 op += n;
1791                         }
1792
1793                         /* clear collected characters from buffer */
1794                         ccbp->hi_rxopos = op;
1795
1796                         DPRINT((pp, DBG_INTR, "n = %d, op = %d, ip = %d\n",
1797                                                 n, op, ip));
1798
1799                         /*
1800                          * at this point...
1801                          * n = number of chars placed in si_rxbuf
1802                          */
1803
1804                         /*
1805                          * Avoid the grotesquely inefficient lineswitch
1806                          * routine (ttyinput) in "raw" mode. It usually
1807                          * takes about 450 instructions (that's without
1808                          * canonical processing or echo!). slinput is
1809                          * reasonably fast (usually 40 instructions
1810                          * plus call overhead).
1811                          */
1812                         if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
1813
1814                                 /* block if the driver supports it */
1815                                 if (tp->t_rawq.c_cc + n >= SI_I_HIGH_WATER &&
1816                                     (tp->t_cflag & CRTS_IFLOW ||
1817                                      tp->t_iflag & IXOFF) &&
1818                                     !(tp->t_state & TS_TBLOCK))
1819                                         ttyblock(tp);
1820
1821                                 tk_nin += n;
1822                                 tk_rawcc += n;
1823                                 tp->t_rawcc += n;
1824
1825                                 pp->sp_delta_overflows +=
1826                                     b_to_q((char *)si_rxbuf, n, &tp->t_rawq);
1827
1828                                 ttwakeup(tp);
1829                                 if (tp->t_state & TS_TTSTOP &&
1830                                     (tp->t_iflag & IXANY ||
1831                                      tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
1832                                         tp->t_state &= ~TS_TTSTOP;
1833                                         tp->t_lflag &= ~FLUSHO;
1834                                         si_start(tp);
1835                                 }
1836                         } else {
1837                                 /*
1838                                  * It'd be nice to not have to go through the
1839                                  * function call overhead for each char here.
1840                                  * It'd be nice to block input it, saving a
1841                                  * loop here and the call/return overhead.
1842                                  */
1843                                 for(x = 0; x < n; x++) {
1844                                         i = si_rxbuf[x];
1845                                         if ((*linesw[tp->t_line].l_rint)(i, tp)
1846                                              == -1) {
1847                                                 pp->sp_delta_overflows++;
1848                                         }
1849                                         /*
1850                                          * doesn't seem to be much point doing
1851                                          * this here.. this driver has no
1852                                          * softtty processing! ??
1853                                          */
1854                                         if (pp->sp_hotchar && i == pp->sp_hotchar) {
1855                                                 setsofttty();
1856                                         }
1857                                 }
1858                         }
1859                         goto more_rx;   /* try for more until RXbuf is empty */
1860
1861         end_rx:         /* XXX: Again, sorry about the gotos.. :-) */
1862
1863                         /*
1864                          * Do TX stuff
1865                          */
1866                         (*linesw[tp->t_line].l_start)(tp);
1867
1868                 } /* end of for (all ports on this controller) */
1869         } /* end of for (all controllers) */
1870
1871         in_intr = 0;
1872         DPRINT((0, arg == NULL ? DBG_POLL:DBG_INTR, "end si_intr\n"));
1873 }
1874
1875 /*
1876  * Nudge the transmitter...
1877  *
1878  * XXX: I inherited some funny code here.  It implies the host card only
1879  * interrupts when the transmit buffer reaches the low-water-mark, and does
1880  * not interrupt when it's actually hits empty.  In some cases, we have
1881  * processes waiting for complete drain, and we need to simulate an interrupt
1882  * about when we think the buffer is going to be empty (and retry if not).
1883  * I really am not certain about this...  I *need* the hardware manuals.
1884  */
1885 static void
1886 si_start(struct tty *tp)
1887 {
1888         struct si_port *pp;
1889         volatile struct si_channel *ccbp;
1890         struct clist *qp;
1891         BYTE ipos;
1892         int nchar;
1893         int oldspl, count, n, amount, buffer_full;
1894
1895         oldspl = spltty();
1896
1897         qp = &tp->t_outq;
1898         pp = TP2PP(tp);
1899
1900         DPRINT((pp, DBG_ENTRY|DBG_START,
1901                 "si_start(%x) t_state %x sp_state %x t_outq.c_cc %d\n",
1902                 tp, tp->t_state, pp->sp_state, qp->c_cc));
1903
1904         if (tp->t_state & (TS_TIMEOUT|TS_TTSTOP))
1905                 goto out;
1906
1907         buffer_full = 0;
1908         ccbp = pp->sp_ccb;
1909
1910         count = (int)ccbp->hi_txipos - (int)ccbp->hi_txopos;
1911         DPRINT((pp, DBG_START, "count %d\n", (BYTE)count));
1912
1913         while ((nchar = qp->c_cc) > 0) {
1914                 if ((BYTE)count >= 255) {
1915                         buffer_full++;
1916                         break;
1917                 }
1918                 amount = min(nchar, (255 - (BYTE)count));
1919                 ipos = (unsigned int)ccbp->hi_txipos;
1920                 n = q_to_b(&tp->t_outq, si_txbuf, amount);
1921                 /* will it fit in one lump? */
1922                 if ((SI_BUFFERSIZE - ipos) >= n) {
1923                         si_bcopyv(si_txbuf, &ccbp->hi_txbuf[ipos], n);
1924                 } else {
1925                         si_bcopyv(si_txbuf, &ccbp->hi_txbuf[ipos],
1926                                 SI_BUFFERSIZE - ipos);
1927                         si_bcopyv(si_txbuf + (SI_BUFFERSIZE - ipos),
1928                                 &ccbp->hi_txbuf[0], n - (SI_BUFFERSIZE - ipos));
1929                 }
1930                 ccbp->hi_txipos += n;
1931                 count = (int)ccbp->hi_txipos - (int)ccbp->hi_txopos;
1932         }
1933
1934         if (count != 0 && nchar == 0) {
1935                 tp->t_state |= TS_BUSY;
1936         } else {
1937                 tp->t_state &= ~TS_BUSY;
1938         }
1939
1940         /* wakeup time? */
1941         ttwwakeup(tp);
1942
1943         DPRINT((pp, DBG_START, "count %d, nchar %d, tp->t_state 0x%x\n",
1944                 (BYTE)count, nchar, tp->t_state));
1945
1946         if (tp->t_state & TS_BUSY)
1947         {
1948                 int time;
1949
1950                 time = ttspeedtab(tp->t_ospeed, chartimes);
1951
1952                 if (time > 0) {
1953                         if (time < nchar)
1954                                 time = nchar / time;
1955                         else
1956                                 time = 2;
1957                 } else {
1958                         DPRINT((pp, DBG_START,
1959                                 "bad char time value! %d\n", time));
1960                         time = hz/10;
1961                 }
1962
1963                 if ((pp->sp_state & (SS_LSTART|SS_INLSTART)) == SS_LSTART) {
1964                         callout_stop(&pp->lstart_ch);
1965                 } else {
1966                         pp->sp_state |= SS_LSTART;
1967                 }
1968                 DPRINT((pp, DBG_START, "arming lstart, time=%d\n", time));
1969                 callout_reset(&pp->lstart_ch, time, si_lstart, (void *)pp);
1970         }
1971
1972 out:
1973         splx(oldspl);
1974         DPRINT((pp, DBG_EXIT|DBG_START, "leave si_start()\n"));
1975 }
1976
1977 /*
1978  * Note: called at splsoftclock from the timeout code
1979  * This has to deal with two things...  cause wakeups while waiting for
1980  * tty drains on last process exit, and call l_start at about the right
1981  * time for protocols like ppp.
1982  */
1983 static void
1984 si_lstart(void *arg)
1985 {
1986         struct si_port *pp = arg;
1987         struct tty *tp;
1988         int oldspl;
1989
1990         DPRINT((pp, DBG_ENTRY|DBG_LSTART, "si_lstart(%x) sp_state %x\n",
1991                 pp, pp->sp_state));
1992
1993         oldspl = spltty();
1994
1995         if ((pp->sp_state & SS_OPEN) == 0 || (pp->sp_state & SS_LSTART) == 0) {
1996                 splx(oldspl);
1997                 return;
1998         }
1999         pp->sp_state &= ~SS_LSTART;
2000         pp->sp_state |= SS_INLSTART;
2001
2002         tp = pp->sp_tty;
2003
2004         /* deal with the process exit case */
2005         ttwwakeup(tp);
2006
2007         /* nudge protocols - eg: ppp */
2008         (*linesw[tp->t_line].l_start)(tp);
2009
2010         pp->sp_state &= ~SS_INLSTART;
2011         splx(oldspl);
2012 }
2013
2014 /*
2015  * Stop output on a line. called at spltty();
2016  */
2017 void
2018 si_stop(struct tty *tp, int rw)
2019 {
2020         volatile struct si_channel *ccbp;
2021         struct si_port *pp;
2022
2023         pp = TP2PP(tp);
2024         ccbp = pp->sp_ccb;
2025
2026         DPRINT((TP2PP(tp), DBG_ENTRY|DBG_STOP, "si_stop(%x,%x)\n", tp, rw));
2027
2028         /* XXX: must check (rw & FWRITE | FREAD) etc flushing... */
2029         if (rw & FWRITE) {
2030                 /* what level are we meant to be flushing anyway? */
2031                 if (tp->t_state & TS_BUSY) {
2032                         si_command(TP2PP(tp), WFLUSH, SI_NOWAIT);
2033                         tp->t_state &= ~TS_BUSY;
2034                         ttwwakeup(tp);  /* Bruce???? */
2035                 }
2036         }
2037 #if 1   /* XXX: this doesn't work right yet.. */
2038         /* XXX: this may have been failing because we used to call l_rint()
2039          * while we were looping based on these two counters. Now, we collect
2040          * the data and then loop stuffing it into l_rint(), making this
2041          * useless.  Should we cause this to blow away the staging buffer?
2042          */
2043         if (rw & FREAD) {
2044                 ccbp->hi_rxopos = ccbp->hi_rxipos;
2045         }
2046 #endif
2047 }
2048
2049 /*
2050  * Issue a command to the host card CPU.
2051  */
2052
2053 static void
2054 si_command(struct si_port *pp, int cmd, int waitflag)
2055 {
2056         int oldspl;
2057         volatile struct si_channel *ccbp = pp->sp_ccb;
2058         int x;
2059
2060         DPRINT((pp, DBG_ENTRY|DBG_PARAM, "si_command(%x,%x,%d): hi_stat 0x%x\n",
2061                 pp, cmd, waitflag, ccbp->hi_stat));
2062
2063         oldspl = spltty();              /* Keep others out */
2064
2065         /* wait until it's finished what it was doing.. */
2066         /* XXX: sits in IDLE_BREAK until something disturbs it or break
2067          * is turned off. */
2068         while((x = ccbp->hi_stat) != IDLE_OPEN &&
2069                         x != IDLE_CLOSE &&
2070                         x != IDLE_BREAK &&
2071                         x != cmd) {
2072                 if (in_intr) {                  /* Prevent sleep in intr */
2073                         DPRINT((pp, DBG_PARAM,
2074                                 "cmd intr collision - completing %d\trequested %d\n",
2075                                 x, cmd));
2076                         splx(oldspl);
2077                         return;
2078                 } else if (ttysleep(pp->sp_tty, (caddr_t)&pp->sp_state, PCATCH,
2079                                 "sicmd1", 1)) {
2080                         splx(oldspl);
2081                         return;
2082                 }
2083         }
2084         /* it should now be in IDLE_{OPEN|CLOSE|BREAK}, or "cmd" */
2085
2086         /* if there was a pending command, cause a state-change wakeup */
2087         switch(pp->sp_pend) {
2088         case LOPEN:
2089         case MPEND:
2090         case MOPEN:
2091         case CONFIG:
2092         case SBREAK:
2093         case EBREAK:
2094                 wakeup(&pp->sp_state);
2095                 break;
2096         default:
2097                 break;
2098         }
2099
2100         pp->sp_pend = cmd;              /* New command pending */
2101         ccbp->hi_stat = cmd;            /* Post it */
2102
2103         if (waitflag) {
2104                 if (in_intr) {          /* If in interrupt handler */
2105                         DPRINT((pp, DBG_PARAM,
2106                                 "attempt to sleep in si_intr - cmd req %d\n",
2107                                 cmd));
2108                         splx(oldspl);
2109                         return;
2110                 } else while(ccbp->hi_stat != IDLE_OPEN &&
2111                              ccbp->hi_stat != IDLE_BREAK) {
2112                         if (ttysleep(pp->sp_tty, (caddr_t)&pp->sp_state, PCATCH,
2113                             "sicmd2", 0))
2114                                 break;
2115                 }
2116         }
2117         splx(oldspl);
2118 }
2119
2120 static void
2121 si_disc_optim(struct tty *tp, struct termios *t, struct si_port *pp)
2122 {
2123         /*
2124          * XXX can skip a lot more cases if Smarts.  Maybe
2125          * (IGNCR | ISTRIP | IXON) in c_iflag.  But perhaps we
2126          * shouldn't skip if (TS_CNTTB | TS_LNCH) is set in t_state.
2127          */
2128         if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) &&
2129             (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) &&
2130             (!(t->c_iflag & PARMRK) ||
2131              (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) &&
2132             !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) &&
2133             linesw[tp->t_line].l_rint == ttyinput)
2134                 tp->t_state |= TS_CAN_BYPASS_L_RINT;
2135         else
2136                 tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
2137         pp->sp_hotchar = linesw[tp->t_line].l_hotchar;
2138         DPRINT((pp, DBG_OPTIM, "bypass: %s, hotchar: %x\n",
2139                 (tp->t_state & TS_CAN_BYPASS_L_RINT) ? "on" : "off",
2140                 pp->sp_hotchar));
2141 }
2142
2143
2144 #ifdef  SI_DEBUG
2145
2146 void
2147 si_dprintf(struct si_port *pp, int flags, const char *fmt, ...)
2148 {
2149         __va_list ap;
2150
2151         if ((pp == NULL && (si_debug&flags)) ||
2152             (pp != NULL && ((pp->sp_debug&flags) || (si_debug&flags)))) {
2153                 if (pp != NULL)
2154                         printf("%ci%d(%d): ", 's',
2155                                 (int)SI_CARD(minor(pp->sp_tty->t_dev)),
2156                                 (int)SI_PORT(minor(pp->sp_tty->t_dev)));
2157                 __va_start(ap, fmt);
2158                 vprintf(fmt, ap);
2159                 __va_end(ap);
2160         }
2161 }
2162
2163 static char *
2164 si_mctl2str(enum si_mctl cmd)
2165 {
2166         switch (cmd) {
2167         case GET:
2168                 return("GET");
2169         case SET:
2170                 return("SET");
2171         case BIS:
2172                 return("BIS");
2173         case BIC:
2174                 return("BIC");
2175         }
2176         return("BAD");
2177 }
2178
2179 #endif  /* DEBUG */
2180
2181 static char *
2182 si_modulename(int host_type, int uart_type)
2183 {
2184         switch (host_type) {
2185         /* Z280 based cards */
2186         case SIEISA:
2187         case SIHOST2:
2188         case SIHOST:
2189         case SIPCI:
2190                 switch (uart_type) {
2191                 case 0:
2192                         return(" (XIO)");
2193                 case 1:
2194                         return(" (SI)");
2195                 }
2196                 break;
2197         /* T225 based hosts */
2198         case SIJETPCI:
2199         case SIJETISA:
2200                 switch (uart_type) {
2201                 case 0:
2202                         return(" (SI)");
2203                 case 40:
2204                         return(" (XIO)");
2205                 case 72:
2206                         return(" (SXDC)");
2207                 }
2208                 break;
2209         }
2210         return("");
2211 }