2 * Copyright (C) 1995 by Pavel Antonov, Moscow, Russia.
3 * Copyright (C) 1995 by Andrey A. Chernov, Moscow, Russia.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * $FreeBSD: src/sys/i386/isa/rc.c,v 1.53.2.1 2001/02/26 04:23:10 jlemon Exp $
28 * $DragonFly: src/sys/dev/serial/rc/rc.c,v 1.24 2008/08/02 01:14:43 dillon Exp $
33 * SDL Communications Riscom/8 (based on Cirrus Logic CL-CD180) driver
41 #include <sys/param.h>
42 #include <sys/systm.h>
47 #include <sys/dkstat.h>
48 #include <sys/fcntl.h>
49 #include <sys/interrupt.h>
50 #include <sys/kernel.h>
51 #include <sys/thread2.h>
52 #include <machine/clock.h>
54 #include <bus/isa/isa_device.h>
56 #include <machine_base/isa/ic/cd180.h>
60 static int rcprobe (struct isa_device *);
61 static int rcattach (struct isa_device *);
63 #define rcin(port) RC_IN (nec, port)
64 #define rcout(port,v) RC_OUT (nec, port, v)
66 #define WAITFORCCR(u,c) rc_wait0(nec, (u), (c), __LINE__)
67 #define CCRCMD(u,c,cmd) WAITFORCCR((u), (c)); rcout(CD180_CCR, (cmd))
69 #define RC_IBUFSIZE 256
70 #define RB_I_HIGH_WATER (TTYHOG - 2 * RC_IBUFSIZE)
71 #define RC_OBUFSIZE 512
72 #define RC_IHIGHWATER (3 * RC_IBUFSIZE / 4)
73 #define INPUT_FLAGS_SHIFT (2 * RC_IBUFSIZE)
74 #define LOTS_OF_EVENTS 64
76 #define RC_FAKEID 0x10
81 #define GET_UNIT(dev) (minor(dev) & 0x3F)
82 #define CALLOUT(dev) (minor(dev) & 0x80)
84 /* For isa routines */
85 struct isa_driver rcdriver = {
86 rcprobe, rcattach, "rc"
89 static d_open_t rcopen;
90 static d_close_t rcclose;
91 static d_ioctl_t rcioctl;
94 static struct dev_ops rc_ops = {
95 { "rc", CDEV_MAJOR, D_TTY | D_KQFILTER },
102 .d_kqfilter = ttykqfilter,
103 .d_revoke = ttyrevoke
106 /* Per-board structure */
107 static struct rc_softc {
108 u_int rcb_probed; /* 1 - probed, 2 - attached */
109 u_int rcb_addr; /* Base I/O addr */
110 u_int rcb_unit; /* unit # */
111 u_char rcb_dtr; /* DTR status */
112 struct rc_chans *rcb_baserc; /* base rc ptr */
115 /* Per-channel structure */
116 static struct rc_chans {
117 struct rc_softc *rc_rcb; /* back ptr */
118 u_short rc_flags; /* Misc. flags */
119 int rc_chan; /* Channel # */
120 u_char rc_ier; /* intr. enable reg */
121 u_char rc_msvr; /* modem sig. status */
122 u_char rc_cor2; /* options reg */
123 u_char rc_pendcmd; /* special cmd pending */
124 u_int rc_dtrwait; /* dtr timeout */
125 u_int rc_dcdwaits; /* how many waits DCD in open */
126 u_char rc_hotchar; /* end packed optimize */
127 struct tty *rc_tp; /* tty struct */
128 u_char *rc_iptr; /* Chars input buffer */
129 u_char *rc_hiwat; /* hi-water mark */
130 u_char *rc_bufend; /* end of buffer */
131 u_char *rc_optr; /* ptr in output buf */
132 u_char *rc_obufend; /* end of output buf */
133 struct callout rc_dtr_ch;
134 u_char rc_ibuf[4 * RC_IBUFSIZE]; /* input buffer */
135 u_char rc_obuf[RC_OBUFSIZE]; /* output buffer */
136 } rc_chans[NRC * CD180_NCHAN];
138 static int rc_scheduled_event = 0;
139 static struct callout rc_wakeup_ch;
142 static struct tty rc_tty[NRC * CD180_NCHAN];
143 static const int nrc_tty = NRC * CD180_NCHAN;
146 #define RC_DTR_OFF 0x0001 /* DTR wait, for close/open */
147 #define RC_ACTOUT 0x0002 /* Dial-out port active */
148 #define RC_RTSFLOW 0x0004 /* RTS flow ctl enabled */
149 #define RC_CTSFLOW 0x0008 /* CTS flow ctl enabled */
150 #define RC_DORXFER 0x0010 /* RXFER event planned */
151 #define RC_DOXXFER 0x0020 /* XXFER event planned */
152 #define RC_MODCHG 0x0040 /* Modem status changed */
153 #define RC_OSUSP 0x0080 /* Output suspended */
154 #define RC_OSBUSY 0x0100 /* start() routine in progress */
155 #define RC_WAS_BUFOVFL 0x0200 /* low-level buffer ovferflow */
156 #define RC_WAS_SILOVFL 0x0400 /* silo buffer overflow */
157 #define RC_SEND_RDY 0x0800 /* ready to send */
159 /* Table for translation of RCSR status bits to internal form */
160 static int rc_rcsrt[16] = {
162 TTY_FE|TTY_OE, TTY_PE, TTY_PE|TTY_OE,
163 TTY_PE|TTY_FE, TTY_PE|TTY_FE|TTY_OE, TTY_BI,
164 TTY_BI|TTY_OE, TTY_BI|TTY_FE, TTY_BI|TTY_FE|TTY_OE,
165 TTY_BI|TTY_PE, TTY_BI|TTY_PE|TTY_OE, TTY_BI|TTY_PE|TTY_FE,
166 TTY_BI|TTY_PE|TTY_FE|TTY_OE
169 /* Static prototypes */
170 static inthand2_t rcintr;
171 static void rc_hwreset (int, int, unsigned int);
172 static int rc_test (int, int);
173 static void rc_discard_output (struct rc_chans *);
174 static void rc_hardclose (struct rc_chans *);
175 static int rc_modctl (struct rc_chans *, int, int);
176 static void rc_start (struct tty *);
177 static void rc_stop (struct tty *, int rw);
178 static int rc_param (struct tty *, struct termios *);
179 static inthand2_t rcpoll;
180 static void rc_reinit (struct rc_softc *);
182 static void printrcflags();
184 static timeout_t rc_dtrwakeup;
185 static timeout_t rc_wakeup;
186 static void disc_optim (struct tty *tp, struct termios *t, struct rc_chans *);
187 static void rc_wait0 (int nec, int unit, int chan, int line);
189 /**********************************************/
191 /* Quick device probing */
193 rcprobe(struct isa_device *dvp)
195 int irq = ffs(dvp->id_irq) - 1;
196 int nec = dvp->id_iobase;
198 if (dvp->id_unit > NRC)
200 if (!RC_VALIDADDR(nec)) {
201 kprintf("rc%d: illegal base address %x\n", dvp->id_unit, nec);
204 if (!RC_VALIDIRQ(irq)) {
205 kprintf("rc%d: illegal IRQ value %d\n", dvp->id_unit, irq);
208 rcout(CD180_PPRL, 0x22); /* Random values to Prescale reg. */
209 rcout(CD180_PPRH, 0x11);
210 if (rcin(CD180_PPRL) != 0x22 || rcin(CD180_PPRH) != 0x11)
212 /* Now, test the board more thoroughly, with diagnostic */
213 if (rc_test(nec, dvp->id_unit))
215 rc_softc[dvp->id_unit].rcb_probed = RC_PROBED;
221 rcattach(struct isa_device *dvp)
223 int chan, nec = dvp->id_iobase;
224 struct rc_softc *rcb = &rc_softc[dvp->id_unit];
225 struct rc_chans *rc = &rc_chans[dvp->id_unit * CD180_NCHAN];
226 static int rc_started = 0;
229 dvp->id_intr = rcintr;
231 /* Thorooughly test the device */
232 if (rcb->rcb_probed != RC_PROBED)
236 rcb->rcb_baserc = rc;
237 rcb->rcb_unit = dvp->id_unit;
238 /*rcb->rcb_chipid = 0x10 + dvp->id_unit;*/
239 kprintf("rc%d: %d chans, firmware rev. %c\n", rcb->rcb_unit,
240 CD180_NCHAN, (rcin(CD180_GFRCR) & 0xF) + 'A');
242 for (chan = 0; chan < CD180_NCHAN; chan++, rc++) {
243 callout_init(&rc->rc_dtr_ch);
246 rc->rc_iptr = rc->rc_ibuf;
247 rc->rc_bufend = &rc->rc_ibuf[RC_IBUFSIZE];
248 rc->rc_hiwat = &rc->rc_ibuf[RC_IHIGHWATER];
249 rc->rc_flags = rc->rc_ier = rc->rc_msvr = 0;
250 rc->rc_cor2 = rc->rc_pendcmd = 0;
251 rc->rc_optr = rc->rc_obufend = rc->rc_obuf;
252 rc->rc_dtrwait = 3 * hz;
255 tp = rc->rc_tp = &rc_tty[chan + (dvp->id_unit * CD180_NCHAN)];
257 tp->t_lflag = tp->t_iflag = tp->t_oflag = 0;
258 tp->t_cflag = TTYDEF_CFLAG;
259 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
261 rcb->rcb_probed = RC_ATTACHED;
263 register_swi(SWI_TTY, rcpoll, NULL, "rcpoll", NULL);
264 callout_init(&rc_wakeup_ch);
271 /* RC interrupt handling */
273 rcintr(void *arg, void *frame)
276 struct rc_softc *rcb = &rc_softc[unit];
279 u_char val, iack, bsr, ucnt, *optr;
280 int good_data, t_state;
282 if (rcb->rcb_probed != RC_ATTACHED) {
283 kprintf("rc%d: bogus interrupt\n", unit);
288 bsr = ~(rcin(RC_BSR));
290 if (!(bsr & (RC_BSR_TOUT|RC_BSR_RXINT|RC_BSR_TXINT|RC_BSR_MOINT))) {
291 kprintf("rc%d: extra interrupt\n", unit);
292 rcout(CD180_EOIR, 0);
296 while (bsr & (RC_BSR_TOUT|RC_BSR_RXINT|RC_BSR_TXINT|RC_BSR_MOINT)) {
297 #ifdef RCDEBUG_DETAILED
298 kprintf("rc%d: intr (%02x) %s%s%s%s\n", unit, bsr,
299 (bsr & RC_BSR_TOUT)?"TOUT ":"",
300 (bsr & RC_BSR_RXINT)?"RXINT ":"",
301 (bsr & RC_BSR_TXINT)?"TXINT ":"",
302 (bsr & RC_BSR_MOINT)?"MOINT":"");
304 if (bsr & RC_BSR_TOUT) {
305 kprintf("rc%d: hardware failure, reset board\n", unit);
310 if (bsr & RC_BSR_RXINT) {
311 iack = rcin(RC_PILR_RX);
312 good_data = (iack == (GIVR_IT_RGDI | RC_FAKEID));
313 if (!good_data && iack != (GIVR_IT_REI | RC_FAKEID)) {
314 kprintf("rc%d: fake rxint: %02x\n", unit, iack);
317 rc = rcb->rcb_baserc + ((rcin(CD180_GICR) & GICR_CHAN) >> GICR_LSH);
318 t_state = rc->rc_tp->t_state;
319 /* Do RTS flow control stuff */
320 if ( (rc->rc_flags & RC_RTSFLOW)
321 || !(t_state & TS_ISOPEN)
323 if ( ( !(t_state & TS_ISOPEN)
324 || (t_state & TS_TBLOCK)
326 && (rc->rc_msvr & MSVR_RTS)
329 rc->rc_msvr &= ~MSVR_RTS);
330 else if (!(rc->rc_msvr & MSVR_RTS))
332 rc->rc_msvr |= MSVR_RTS);
334 ucnt = rcin(CD180_RDCR) & 0xF;
337 if (t_state & TS_ISOPEN) {
338 /* check for input buffer overflow */
339 if ((rc->rc_iptr + ucnt) >= rc->rc_bufend) {
341 ucnt = rc->rc_bufend - rc->rc_iptr;
343 if (!(rc->rc_flags & RC_WAS_BUFOVFL)) {
344 rc->rc_flags |= RC_WAS_BUFOVFL;
345 rc_scheduled_event++;
349 /* check foor good data */
352 val = rcin(CD180_RDR);
354 optr[INPUT_FLAGS_SHIFT] = 0;
356 rc_scheduled_event++;
357 if (val != 0 && val == rc->rc_hotchar)
361 /* Store also status data */
363 iack = rcin(CD180_RCSR);
364 if (iack & RCSR_Timeout)
366 if ( (iack & RCSR_OE)
367 && !(rc->rc_flags & RC_WAS_SILOVFL)) {
368 rc->rc_flags |= RC_WAS_SILOVFL;
369 rc_scheduled_event++;
371 val = rcin(CD180_RDR);
373 Don't store PE if IGNPAR and BREAK if IGNBRK,
374 this hack allows "raw" tty optimization
375 works even if IGN* is set.
377 if ( !(iack & (RCSR_PE|RCSR_FE|RCSR_Break))
378 || ((!(iack & (RCSR_PE|RCSR_FE))
379 || !(rc->rc_tp->t_iflag & IGNPAR))
380 && (!(iack & RCSR_Break)
381 || !(rc->rc_tp->t_iflag & IGNBRK)))) {
382 if ( (iack & (RCSR_PE|RCSR_FE))
383 && (t_state & TS_CAN_BYPASS_L_RINT)
386 && (rc->rc_tp->t_iflag & INPCK))))
388 else if (val != 0 && val == rc->rc_hotchar)
391 optr[INPUT_FLAGS_SHIFT] = iack;
393 rc_scheduled_event++;
398 rc->rc_flags |= RC_DORXFER;
401 /* Clear FIFO if necessary */
402 while (resid-- > 0) {
404 iack = rcin(CD180_RCSR);
407 if (iack & RCSR_Timeout)
409 (void) rcin(CD180_RDR);
413 if (bsr & RC_BSR_MOINT) {
414 iack = rcin(RC_PILR_MODEM);
415 if (iack != (GIVR_IT_MSCI | RC_FAKEID)) {
416 kprintf("rc%d: fake moint: %02x\n", unit, iack);
419 rc = rcb->rcb_baserc + ((rcin(CD180_GICR) & GICR_CHAN) >> GICR_LSH);
420 iack = rcin(CD180_MCR);
421 rc->rc_msvr = rcin(CD180_MSVR);
424 printrcflags(rc, "moint");
426 if (rc->rc_flags & RC_CTSFLOW) {
427 if (rc->rc_msvr & MSVR_CTS)
428 rc->rc_flags |= RC_SEND_RDY;
430 rc->rc_flags &= ~RC_SEND_RDY;
432 rc->rc_flags |= RC_SEND_RDY;
433 if ((iack & MCR_CDchg) && !(rc->rc_flags & RC_MODCHG)) {
434 rc_scheduled_event += LOTS_OF_EVENTS;
435 rc->rc_flags |= RC_MODCHG;
440 if (bsr & RC_BSR_TXINT) {
441 iack = rcin(RC_PILR_TX);
442 if (iack != (GIVR_IT_TDI | RC_FAKEID)) {
443 kprintf("rc%d: fake txint: %02x\n", unit, iack);
446 rc = rcb->rcb_baserc + ((rcin(CD180_GICR) & GICR_CHAN) >> GICR_LSH);
447 if ( (rc->rc_flags & RC_OSUSP)
448 || !(rc->rc_flags & RC_SEND_RDY)
451 /* Handle breaks and other stuff */
452 if (rc->rc_pendcmd) {
453 rcout(CD180_COR2, rc->rc_cor2 |= COR2_ETC);
454 rcout(CD180_TDR, CD180_C_ESC);
455 rcout(CD180_TDR, rc->rc_pendcmd);
456 rcout(CD180_COR2, rc->rc_cor2 &= ~COR2_ETC);
461 resid = rc->rc_obufend - optr;
462 if (resid > CD180_NFIFO)
465 rcout(CD180_TDR, *optr++);
468 /* output completed? */
469 if (optr >= rc->rc_obufend) {
470 rcout(CD180_IER, rc->rc_ier &= ~IER_TxRdy);
472 kprintf("rc%d/%d: output completed\n", unit, rc->rc_chan);
474 if (!(rc->rc_flags & RC_DOXXFER)) {
475 rc_scheduled_event += LOTS_OF_EVENTS;
476 rc->rc_flags |= RC_DOXXFER;
482 rcout(CD180_EOIR, 0); /* end of interrupt */
484 bsr = ~(rcin(RC_BSR));
488 /* Feed characters to output buffer */
490 rc_start(struct tty *tp)
492 struct rc_chans *rc = &rc_chans[GET_UNIT(tp->t_dev)];
493 int nec = rc->rc_rcb->rcb_addr;
495 if (rc->rc_flags & RC_OSBUSY)
498 rc->rc_flags |= RC_OSBUSY;
500 if (tp->t_state & TS_TTSTOP)
501 rc->rc_flags |= RC_OSUSP;
503 rc->rc_flags &= ~RC_OSUSP;
504 /* Do RTS flow control stuff */
505 if ( (rc->rc_flags & RC_RTSFLOW)
506 && (tp->t_state & TS_TBLOCK)
507 && (rc->rc_msvr & MSVR_RTS)
509 rcout(CD180_CAR, rc->rc_chan);
510 rcout(CD180_MSVR, rc->rc_msvr &= ~MSVR_RTS);
511 } else if (!(rc->rc_msvr & MSVR_RTS)) {
512 rcout(CD180_CAR, rc->rc_chan);
513 rcout(CD180_MSVR, rc->rc_msvr |= MSVR_RTS);
516 if (tp->t_state & (TS_TIMEOUT|TS_TTSTOP))
519 printrcflags(rc, "rcstart");
523 kprintf("rcstart: outq = %d obuf = %d\n",
524 tp->t_outq.c_cc, rc->rc_obufend - rc->rc_optr);
526 if (tp->t_state & TS_BUSY)
527 goto out; /* output still in progress ... */
529 if (tp->t_outq.c_cc > 0) {
532 tp->t_state |= TS_BUSY;
533 ocnt = q_to_b(&tp->t_outq, rc->rc_obuf, sizeof rc->rc_obuf);
535 rc->rc_optr = rc->rc_obuf;
536 rc->rc_obufend = rc->rc_optr + ocnt;
538 if (!(rc->rc_ier & IER_TxRdy)) {
540 kprintf("rc%d/%d: rcstart enable txint\n", rc->rc_rcb->rcb_unit, rc->rc_chan);
542 rcout(CD180_CAR, rc->rc_chan);
543 rcout(CD180_IER, rc->rc_ier |= IER_TxRdy);
547 rc->rc_flags &= ~RC_OSBUSY;
551 /* Handle delayed events. */
553 rcpoll(void *dummy, void *frame)
556 struct rc_softc *rcb;
559 int chan, icnt, nec, unit;
561 if (rc_scheduled_event == 0)
564 for (unit = 0; unit < NRC; unit++) {
565 rcb = &rc_softc[unit];
566 rc = rcb->rcb_baserc;
567 nec = rc->rc_rcb->rcb_addr;
568 for (chan = 0; chan < CD180_NCHAN; rc++, chan++) {
571 if (rc->rc_flags & (RC_DORXFER|RC_DOXXFER|RC_MODCHG|
572 RC_WAS_BUFOVFL|RC_WAS_SILOVFL))
573 printrcflags(rc, "rcevent");
575 if (rc->rc_flags & RC_WAS_BUFOVFL) {
577 rc->rc_flags &= ~RC_WAS_BUFOVFL;
578 rc_scheduled_event--;
580 kprintf("rc%d/%d: interrupt-level buffer overflow\n",
583 if (rc->rc_flags & RC_WAS_SILOVFL) {
585 rc->rc_flags &= ~RC_WAS_SILOVFL;
586 rc_scheduled_event--;
588 kprintf("rc%d/%d: silo overflow\n",
591 if (rc->rc_flags & RC_MODCHG) {
593 rc->rc_flags &= ~RC_MODCHG;
594 rc_scheduled_event -= LOTS_OF_EVENTS;
596 (*linesw[tp->t_line].l_modem)(tp, !!(rc->rc_msvr & MSVR_CD));
598 if (rc->rc_flags & RC_DORXFER) {
600 rc->rc_flags &= ~RC_DORXFER;
602 if (rc->rc_bufend == &rc->rc_ibuf[2 * RC_IBUFSIZE])
603 tptr = &rc->rc_ibuf[RC_IBUFSIZE];
608 if (rc->rc_bufend == &rc->rc_ibuf[2 * RC_IBUFSIZE]) {
609 rc->rc_iptr = rc->rc_ibuf;
610 rc->rc_bufend = &rc->rc_ibuf[RC_IBUFSIZE];
611 rc->rc_hiwat = &rc->rc_ibuf[RC_IHIGHWATER];
613 rc->rc_iptr = &rc->rc_ibuf[RC_IBUFSIZE];
614 rc->rc_bufend = &rc->rc_ibuf[2 * RC_IBUFSIZE];
616 &rc->rc_ibuf[RC_IBUFSIZE + RC_IHIGHWATER];
618 if ( (rc->rc_flags & RC_RTSFLOW)
619 && (tp->t_state & TS_ISOPEN)
620 && !(tp->t_state & TS_TBLOCK)
621 && !(rc->rc_msvr & MSVR_RTS)
623 rcout(CD180_CAR, chan);
625 rc->rc_msvr |= MSVR_RTS);
627 rc_scheduled_event -= icnt;
631 if (icnt <= 0 || !(tp->t_state & TS_ISOPEN))
634 if ( (tp->t_state & TS_CAN_BYPASS_L_RINT)
635 && !(tp->t_state & TS_LOCAL)) {
636 if ((tp->t_rawq.c_cc + icnt) >= RB_I_HIGH_WATER
637 && ((rc->rc_flags & RC_RTSFLOW) || (tp->t_iflag & IXOFF))
638 && !(tp->t_state & TS_TBLOCK))
643 if (b_to_q(tptr, icnt, &tp->t_rawq))
644 kprintf("rc%d/%d: tty-level buffer overflow\n",
647 if ((tp->t_state & TS_TTSTOP) && ((tp->t_iflag & IXANY)
648 || (tp->t_cc[VSTART] == tp->t_cc[VSTOP]))) {
649 tp->t_state &= ~TS_TTSTOP;
650 tp->t_lflag &= ~FLUSHO;
654 for (; tptr < eptr; tptr++)
655 (*linesw[tp->t_line].l_rint)
657 rc_rcsrt[tptr[INPUT_FLAGS_SHIFT] & 0xF], tp);
661 if (rc->rc_flags & RC_DOXXFER) {
663 rc_scheduled_event -= LOTS_OF_EVENTS;
664 rc->rc_flags &= ~RC_DOXXFER;
665 rc->rc_tp->t_state &= ~TS_BUSY;
667 (*linesw[tp->t_line].l_start)(tp);
670 if (rc_scheduled_event == 0)
673 if (rc_scheduled_event >= LOTS_OF_EVENTS)
678 rc_stop(struct tty *tp, int rw)
680 struct rc_chans *rc = &rc_chans[GET_UNIT(tp->t_dev)];
684 kprintf("rc%d/%d: rc_stop %s%s\n", rc->rc_rcb->rcb_unit, rc->rc_chan,
685 (rw & FWRITE)?"FWRITE ":"", (rw & FREAD)?"FREAD":"");
688 rc_discard_output(rc);
691 rc->rc_flags &= ~RC_DORXFER;
693 if (rc->rc_bufend == &rc->rc_ibuf[2 * RC_IBUFSIZE]) {
694 tptr = &rc->rc_ibuf[RC_IBUFSIZE];
695 rc->rc_iptr = &rc->rc_ibuf[RC_IBUFSIZE];
698 rc->rc_iptr = rc->rc_ibuf;
700 rc_scheduled_event -= eptr - tptr;
702 if (tp->t_state & TS_TTSTOP)
703 rc->rc_flags |= RC_OSUSP;
705 rc->rc_flags &= ~RC_OSUSP;
710 rcopen(struct dev_open_args *ap)
712 cdev_t dev = ap->a_head.a_dev;
715 int unit, nec, error = 0;
717 unit = GET_UNIT(dev);
718 if (unit >= NRC * CD180_NCHAN)
720 if (rc_softc[unit / CD180_NCHAN].rcb_probed != RC_ATTACHED)
722 rc = &rc_chans[unit];
725 nec = rc->rc_rcb->rcb_addr;
727 kprintf("rc%d/%d: rcopen: dev %x\n", rc->rc_rcb->rcb_unit, unit, dev);
732 while (rc->rc_flags & RC_DTR_OFF) {
733 error = tsleep(&(rc->rc_dtrwait), PCATCH, "rcdtr", 0);
737 if (tp->t_state & TS_ISOPEN) {
739 if (!(rc->rc_flags & RC_ACTOUT)) {
744 if (rc->rc_flags & RC_ACTOUT) {
745 if (ap->a_oflags & O_NONBLOCK) {
749 error = tsleep(&rc->rc_rcb, PCATCH, "rcbi", 0);
755 if (tp->t_state & TS_XCLUDE &&
756 priv_check_cred(ap->a_cred, PRIV_ROOT, 0)) {
761 tp->t_oproc = rc_start;
762 tp->t_param = rc_param;
763 tp->t_stop = rc_stop;
767 tp->t_cflag |= CLOCAL;
769 tp->t_cflag &= ~CLOCAL;
771 error = rc_param(tp, &tp->t_termios);
774 (void) rc_modctl(rc, TIOCM_RTS|TIOCM_DTR, DMSET);
776 if ((rc->rc_msvr & MSVR_CD) || CALLOUT(dev))
777 (*linesw[tp->t_line].l_modem)(tp, 1);
779 if (!(tp->t_state & TS_CARR_ON) && !CALLOUT(dev)
780 && !(tp->t_cflag & CLOCAL) && !(ap->a_oflags & O_NONBLOCK)) {
782 error = tsleep(TSA_CARR_ON(tp), PCATCH, "rcdcd", 0);
788 error = (*linesw[tp->t_line].l_open)(dev, tp);
789 disc_optim(tp, &tp->t_termios, rc);
790 if ((tp->t_state & TS_ISOPEN) && CALLOUT(dev))
791 rc->rc_flags |= RC_ACTOUT;
795 if(rc->rc_dcdwaits == 0 && !(tp->t_state & TS_ISOPEN))
802 rcclose(struct dev_close_args *ap)
804 cdev_t dev = ap->a_head.a_dev;
807 int unit = GET_UNIT(dev);
809 if (unit >= NRC * CD180_NCHAN)
811 rc = &rc_chans[unit];
814 kprintf("rc%d/%d: rcclose dev %x\n", rc->rc_rcb->rcb_unit, unit, dev);
817 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag);
818 disc_optim(tp, &tp->t_termios, rc);
819 rc_stop(tp, FREAD | FWRITE);
827 rc_hardclose(struct rc_chans *rc)
829 int nec = rc->rc_rcb->rcb_addr;
830 struct tty *tp = rc->rc_tp;
833 rcout(CD180_CAR, rc->rc_chan);
835 /* Disable rx/tx intrs */
836 rcout(CD180_IER, rc->rc_ier = 0);
837 if ( (tp->t_cflag & HUPCL)
838 || (!(rc->rc_flags & RC_ACTOUT)
839 && !(rc->rc_msvr & MSVR_CD)
840 && !(tp->t_cflag & CLOCAL))
841 || !(tp->t_state & TS_ISOPEN)
843 CCRCMD(rc->rc_rcb->rcb_unit, rc->rc_chan, CCR_ResetChan);
844 WAITFORCCR(rc->rc_rcb->rcb_unit, rc->rc_chan);
845 (void) rc_modctl(rc, TIOCM_RTS, DMSET);
846 if (rc->rc_dtrwait) {
847 callout_reset(&rc->rc_dtr_ch, rc->rc_dtrwait,
849 rc->rc_flags |= RC_DTR_OFF;
852 rc->rc_flags &= ~RC_ACTOUT;
853 wakeup((caddr_t) &rc->rc_rcb); /* wake bi */
854 wakeup(TSA_CARR_ON(tp));
858 /* Reset the bastard */
860 rc_hwreset(int unit, int nec, unsigned int chipid)
862 CCRCMD(unit, -1, CCR_HWRESET); /* Hardware reset */
864 WAITFORCCR(unit, -1);
866 rcout(RC_CTOUT, 0); /* Clear timeout */
867 rcout(CD180_GIVR, chipid);
868 rcout(CD180_GICR, 0);
870 /* Set Prescaler Registers (1 msec) */
871 rcout(CD180_PPRL, ((RC_OSCFREQ + 999) / 1000) & 0xFF);
872 rcout(CD180_PPRH, ((RC_OSCFREQ + 999) / 1000) >> 8);
874 /* Initialize Priority Interrupt Level Registers */
875 rcout(CD180_PILR1, RC_PILR_MODEM);
876 rcout(CD180_PILR2, RC_PILR_TX);
877 rcout(CD180_PILR3, RC_PILR_RX);
883 /* Set channel parameters */
885 rc_param(struct tty *tp, struct termios *ts)
887 struct rc_chans *rc = &rc_chans[GET_UNIT(tp->t_dev)];
888 int nec = rc->rc_rcb->rcb_addr;
889 int idivs, odivs, val, cflag, iflag, lflag, inpflow;
891 if ( ts->c_ospeed < 0 || ts->c_ospeed > 76800
892 || ts->c_ispeed < 0 || ts->c_ispeed > 76800
895 if (ts->c_ispeed == 0)
896 ts->c_ispeed = ts->c_ospeed;
897 odivs = RC_BRD(ts->c_ospeed);
898 idivs = RC_BRD(ts->c_ispeed);
903 rcout(CD180_CAR, rc->rc_chan);
905 /* If speed == 0, hangup line */
906 if (ts->c_ospeed == 0) {
907 CCRCMD(rc->rc_rcb->rcb_unit, rc->rc_chan, CCR_ResetChan);
908 WAITFORCCR(rc->rc_rcb->rcb_unit, rc->rc_chan);
909 (void) rc_modctl(rc, TIOCM_DTR, DMBIC);
912 tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
918 rcout(CD180_RBPRL, idivs & 0xFF);
919 rcout(CD180_RBPRH, idivs >> 8);
922 rcout(CD180_TBPRL, odivs & 0xFF);
923 rcout(CD180_TBPRH, odivs >> 8);
926 /* set timeout value */
927 if (ts->c_ispeed > 0) {
928 int itm = ts->c_ispeed > 2400 ? 5 : 10000 / ts->c_ispeed + 1;
930 if ( !(lflag & ICANON)
931 && ts->c_cc[VMIN] != 0 && ts->c_cc[VTIME] != 0
932 && ts->c_cc[VTIME] * 10 > itm)
933 itm = ts->c_cc[VTIME] * 10;
935 rcout(CD180_RTPR, itm <= 255 ? itm : 255);
938 switch (cflag & CSIZE) {
939 case CS5: val = COR1_5BITS; break;
940 case CS6: val = COR1_6BITS; break;
941 case CS7: val = COR1_7BITS; break;
943 case CS8: val = COR1_8BITS; break;
945 if (cflag & PARENB) {
949 if (!(cflag & INPCK))
955 rcout(CD180_COR1, val);
957 /* Set FIFO threshold */
958 val = ts->c_ospeed <= 4800 ? 1 : CD180_NFIFO / 2;
961 && ( ts->c_cc[VSTOP] != _POSIX_VDISABLE
962 && ( ts->c_cc[VSTART] != _POSIX_VDISABLE
968 val |= COR3_SCDE|COR3_FCT;
970 rcout(CD180_COR3, val);
972 /* Initialize on-chip automatic flow control */
974 rc->rc_flags &= ~(RC_CTSFLOW|RC_SEND_RDY);
975 if (cflag & CCTS_OFLOW) {
976 rc->rc_flags |= RC_CTSFLOW;
979 rc->rc_flags |= RC_SEND_RDY;
980 if (tp->t_state & TS_TTSTOP)
981 rc->rc_flags |= RC_OSUSP;
983 rc->rc_flags &= ~RC_OSUSP;
984 if (cflag & CRTS_IFLOW)
985 rc->rc_flags |= RC_RTSFLOW;
987 rc->rc_flags &= ~RC_RTSFLOW;
990 if (ts->c_cc[VSTART] != _POSIX_VDISABLE)
991 rcout(CD180_SCHR1, ts->c_cc[VSTART]);
992 rcout(CD180_SCHR2, ts->c_cc[VSTOP]);
998 rcout(CD180_COR2, rc->rc_cor2 = val);
1000 CCRCMD(rc->rc_rcb->rcb_unit, rc->rc_chan,
1001 CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3);
1003 disc_optim(tp, ts, rc);
1006 val = cflag & CLOCAL ? 0 : MCOR1_CDzd;
1007 if (cflag & CCTS_OFLOW)
1009 rcout(CD180_MCOR1, val);
1011 val = cflag & CLOCAL ? 0 : MCOR2_CDod;
1012 if (cflag & CCTS_OFLOW)
1014 rcout(CD180_MCOR2, val);
1016 /* enable i/o and interrupts */
1017 CCRCMD(rc->rc_rcb->rcb_unit, rc->rc_chan,
1018 CCR_XMTREN | ((cflag & CREAD) ? CCR_RCVREN : CCR_RCVRDIS));
1019 WAITFORCCR(rc->rc_rcb->rcb_unit, rc->rc_chan);
1021 rc->rc_ier = cflag & CLOCAL ? 0 : IER_CD;
1022 if (cflag & CCTS_OFLOW)
1023 rc->rc_ier |= IER_CTS;
1025 rc->rc_ier |= IER_RxData;
1026 if (tp->t_state & TS_BUSY)
1027 rc->rc_ier |= IER_TxRdy;
1028 if (ts->c_ospeed != 0)
1029 rc_modctl(rc, TIOCM_DTR, DMBIS);
1030 if ((cflag & CCTS_OFLOW) && (rc->rc_msvr & MSVR_CTS))
1031 rc->rc_flags |= RC_SEND_RDY;
1032 rcout(CD180_IER, rc->rc_ier);
1037 /* Re-initialize board after bogus interrupts */
1039 rc_reinit(struct rc_softc *rcb)
1041 struct rc_chans *rc, *rce;
1044 nec = rcb->rcb_addr;
1045 rc_hwreset(rcb->rcb_unit, nec, RC_FAKEID);
1046 rc = &rc_chans[rcb->rcb_unit * CD180_NCHAN];
1047 rce = rc + CD180_NCHAN;
1048 for (; rc < rce; rc++)
1049 (void) rc_param(rc->rc_tp, &rc->rc_tp->t_termios);
1053 rcioctl(struct dev_ioctl_args *ap)
1055 cdev_t dev = ap->a_head.a_dev;
1056 struct rc_chans *rc = &rc_chans[GET_UNIT(dev)];
1058 struct tty *tp = rc->rc_tp;
1060 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data,
1061 ap->a_fflag, ap->a_cred);
1062 if (error != ENOIOCTL)
1064 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag);
1065 disc_optim(tp, &tp->t_termios, rc);
1066 if (error != ENOIOCTL)
1070 switch (ap->a_cmd) {
1072 rc->rc_pendcmd = CD180_C_SBRK;
1076 rc->rc_pendcmd = CD180_C_EBRK;
1080 (void) rc_modctl(rc, TIOCM_DTR, DMBIS);
1084 (void) rc_modctl(rc, TIOCM_DTR, DMBIC);
1088 *(int *) ap->a_data = rc_modctl(rc, 0, DMGET);
1092 (void) rc_modctl(rc, *(int *) ap->a_data, DMSET);
1096 (void) rc_modctl(rc, *(int *) ap->a_data, DMBIC);
1100 (void) rc_modctl(rc, *(int *) ap->a_data, DMBIS);
1104 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0);
1109 rc->rc_dtrwait = *(int *)ap->a_data * hz / 100;
1113 *(int *)ap->a_data = rc->rc_dtrwait * 100 / hz;
1125 /* Modem control routines */
1128 rc_modctl(struct rc_chans *rc, int bits, int cmd)
1130 int nec = rc->rc_rcb->rcb_addr;
1131 u_char *dtr = &rc->rc_rcb->rcb_dtr, msvr;
1133 rcout(CD180_CAR, rc->rc_chan);
1137 rcout(RC_DTREG, (bits & TIOCM_DTR) ?
1138 ~(*dtr |= 1 << rc->rc_chan) :
1139 ~(*dtr &= ~(1 << rc->rc_chan)));
1140 msvr = rcin(CD180_MSVR);
1141 if (bits & TIOCM_RTS)
1145 if (bits & TIOCM_DTR)
1149 rcout(CD180_MSVR, msvr);
1153 if (bits & TIOCM_DTR)
1154 rcout(RC_DTREG, ~(*dtr |= 1 << rc->rc_chan));
1155 msvr = rcin(CD180_MSVR);
1156 if (bits & TIOCM_RTS)
1158 if (bits & TIOCM_DTR)
1160 rcout(CD180_MSVR, msvr);
1165 msvr = rc->rc_msvr = rcin(CD180_MSVR);
1167 if (msvr & MSVR_RTS)
1169 if (msvr & MSVR_CTS)
1171 if (msvr & MSVR_DSR)
1173 if (msvr & MSVR_DTR)
1177 if (~rcin(RC_RIREG) & (1 << rc->rc_chan))
1182 if (bits & TIOCM_DTR)
1183 rcout(RC_DTREG, ~(*dtr &= ~(1 << rc->rc_chan)));
1184 msvr = rcin(CD180_MSVR);
1185 if (bits & TIOCM_RTS)
1187 if (bits & TIOCM_DTR)
1189 rcout(CD180_MSVR, msvr);
1192 rc->rc_msvr = rcin(CD180_MSVR);
1196 /* Test the board. */
1198 rc_test(int nec, int unit)
1202 unsigned int iack, chipid;
1203 unsigned short divs;
1204 static u_char ctest[] = "\377\125\252\045\244\0\377";
1207 kprintf("rc%d: ", unit); kprintf s ; kprintf("\n"); \
1208 crit_exit(); return 1; }
1211 u_char txbuf[CD180_NFIFO]; /* TX buffer */
1212 u_char rxbuf[CD180_NFIFO]; /* RX buffer */
1213 int rxptr; /* RX pointer */
1214 int txptr; /* TX pointer */
1215 } tchans[CD180_NCHAN];
1221 /* First, reset board to inital state */
1222 rc_hwreset(unit, nec, chipid);
1224 divs = RC_BRD(19200);
1226 /* Initialize channels */
1227 for (chan = 0; chan < CD180_NCHAN; chan++) {
1229 /* Select and reset channel */
1230 rcout(CD180_CAR, chan);
1231 CCRCMD(unit, chan, CCR_ResetChan);
1232 WAITFORCCR(unit, chan);
1235 rcout(CD180_RBPRL, divs & 0xFF);
1236 rcout(CD180_RBPRH, divs >> 8);
1237 rcout(CD180_TBPRL, divs & 0xFF);
1238 rcout(CD180_TBPRH, divs >> 8);
1240 /* set timeout value */
1241 rcout(CD180_RTPR, 0);
1243 /* Establish local loopback */
1244 rcout(CD180_COR1, COR1_NOPAR | COR1_8BITS | COR1_1SB);
1245 rcout(CD180_COR2, COR2_LLM);
1246 rcout(CD180_COR3, CD180_NFIFO);
1247 CCRCMD(unit, chan, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3);
1248 CCRCMD(unit, chan, CCR_RCVREN | CCR_XMTREN);
1249 WAITFORCCR(unit, chan);
1250 rcout(CD180_MSVR, MSVR_RTS);
1252 /* Fill TXBUF with test data */
1253 for (i = 0; i < CD180_NFIFO; i++) {
1254 tchans[chan].txbuf[i] = ctest[i];
1255 tchans[chan].rxbuf[i] = 0;
1257 tchans[chan].txptr = tchans[chan].rxptr = 0;
1259 /* Now, start transmit */
1260 rcout(CD180_IER, IER_TxMpty|IER_RxData);
1262 /* Pseudo-interrupt poll stuff */
1263 for (rcnt = 10000; rcnt-- > 0; rcnt--) {
1264 i = ~(rcin(RC_BSR));
1265 if (i & RC_BSR_TOUT)
1266 ERR(("BSR timeout bit set\n"))
1267 else if (i & RC_BSR_TXINT) {
1268 iack = rcin(RC_PILR_TX);
1269 if (iack != (GIVR_IT_TDI | chipid))
1270 ERR(("Bad TX intr ack (%02x != %02x)\n",
1271 iack, GIVR_IT_TDI | chipid));
1272 chan = (rcin(CD180_GICR) & GICR_CHAN) >> GICR_LSH;
1273 /* If no more data to transmit, disable TX intr */
1274 if (tchans[chan].txptr >= CD180_NFIFO) {
1275 iack = rcin(CD180_IER);
1276 rcout(CD180_IER, iack & ~IER_TxMpty);
1278 for (iack = tchans[chan].txptr;
1279 iack < CD180_NFIFO; iack++)
1281 tchans[chan].txbuf[iack]);
1282 tchans[chan].txptr = iack;
1284 rcout(CD180_EOIR, 0);
1285 } else if (i & RC_BSR_RXINT) {
1288 iack = rcin(RC_PILR_RX);
1289 if (iack != (GIVR_IT_RGDI | chipid) &&
1290 iack != (GIVR_IT_REI | chipid))
1291 ERR(("Bad RX intr ack (%02x != %02x)\n",
1292 iack, GIVR_IT_RGDI | chipid))
1293 chan = (rcin(CD180_GICR) & GICR_CHAN) >> GICR_LSH;
1294 ucnt = rcin(CD180_RDCR) & 0xF;
1295 while (ucnt-- > 0) {
1296 iack = rcin(CD180_RCSR);
1297 if (iack & RCSR_Timeout)
1300 ERR(("Bad char chan %d (RCSR = %02X)\n",
1302 if (tchans[chan].rxptr > CD180_NFIFO)
1303 ERR(("Got extra chars chan %d\n",
1305 tchans[chan].rxbuf[tchans[chan].rxptr++] =
1308 rcout(CD180_EOIR, 0);
1311 for (iack = chan = 0; chan < CD180_NCHAN; chan++)
1312 if (tchans[chan].rxptr >= CD180_NFIFO)
1314 if (iack == CD180_NCHAN)
1317 for (chan = 0; chan < CD180_NCHAN; chan++) {
1318 /* Select and reset channel */
1319 rcout(CD180_CAR, chan);
1320 CCRCMD(unit, chan, CCR_ResetChan);
1324 ERR(("looses characters during local loopback\n"))
1325 /* Now, check data */
1326 for (chan = 0; chan < CD180_NCHAN; chan++)
1327 for (i = 0; i < CD180_NFIFO; i++)
1328 if (ctest[i] != tchans[chan].rxbuf[i])
1329 ERR(("data mismatch chan %d ptr %d (%d != %d)\n",
1330 chan, i, ctest[i], tchans[chan].rxbuf[i]))
1337 printrcflags(struct rc_chans *rc, char *comment)
1339 u_short f = rc->rc_flags;
1340 int nec = rc->rc_rcb->rcb_addr;
1342 kprintf("rc%d/%d: %s flags: %s%s%s%s%s%s%s%s%s%s%s%s\n",
1343 rc->rc_rcb->rcb_unit, rc->rc_chan, comment,
1344 (f & RC_DTR_OFF)?"DTR_OFF " :"",
1345 (f & RC_ACTOUT) ?"ACTOUT " :"",
1346 (f & RC_RTSFLOW)?"RTSFLOW " :"",
1347 (f & RC_CTSFLOW)?"CTSFLOW " :"",
1348 (f & RC_DORXFER)?"DORXFER " :"",
1349 (f & RC_DOXXFER)?"DOXXFER " :"",
1350 (f & RC_MODCHG) ?"MODCHG " :"",
1351 (f & RC_OSUSP) ?"OSUSP " :"",
1352 (f & RC_OSBUSY) ?"OSBUSY " :"",
1353 (f & RC_WAS_BUFOVFL) ?"BUFOVFL " :"",
1354 (f & RC_WAS_SILOVFL) ?"SILOVFL " :"",
1355 (f & RC_SEND_RDY) ?"SEND_RDY":"");
1357 rcout(CD180_CAR, rc->rc_chan);
1359 kprintf("rc%d/%d: msvr %02x ier %02x ccsr %02x\n",
1360 rc->rc_rcb->rcb_unit, rc->rc_chan,
1365 #endif /* RCDEBUG */
1368 rc_dtrwakeup(void *chan)
1370 struct rc_chans *rc;
1372 rc = (struct rc_chans *)chan;
1373 rc->rc_flags &= ~RC_DTR_OFF;
1374 wakeup(&rc->rc_dtrwait);
1378 rc_discard_output(struct rc_chans *rc)
1381 if (rc->rc_flags & RC_DOXXFER) {
1382 rc_scheduled_event -= LOTS_OF_EVENTS;
1383 rc->rc_flags &= ~RC_DOXXFER;
1385 rc->rc_optr = rc->rc_obufend;
1386 rc->rc_tp->t_state &= ~TS_BUSY;
1388 ttwwakeup(rc->rc_tp);
1392 rc_wakeup(void *chan)
1394 if (rc_scheduled_event != 0) {
1399 callout_reset(&rc_wakeup_ch, 1, rc_wakeup, NULL);
1403 disc_optim(struct tty *tp, struct termios *t, struct rc_chans *rc)
1406 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON))
1407 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK))
1408 && (!(t->c_iflag & PARMRK)
1409 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))
1410 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN))
1411 && linesw[tp->t_line].l_rint == ttyinput)
1412 tp->t_state |= TS_CAN_BYPASS_L_RINT;
1414 tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
1415 rc->rc_hotchar = linesw[tp->t_line].l_hotchar;
1419 rc_wait0(int nec, int unit, int chan, int line)
1423 for (rcnt = 50; rcnt && rcin(CD180_CCR); rcnt--)
1426 kprintf("rc%d/%d: channel command timeout, rc.c line: %d\n",