1 /* $OpenBSD: z8530kbd.c,v 1.32 2024/05/13 01:15:50 jsg Exp $ */
2 /* $NetBSD: z8530tty.c,v 1.77 2001/05/30 15:24:24 lukem Exp $ */
3
4 /*-
5 * Copyright (c) 1993, 1994, 1995, 1996, 1997, 1998, 1999
6 * Charles M. Hannum. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Charles M. Hannum.
19 * 4. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 /*
35 * Copyright (c) 1994 Gordon W. Ross
36 * Copyright (c) 1992, 1993
37 * The Regents of the University of California. All rights reserved.
38 *
39 * This software was developed by the Computer Systems Engineering group
40 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
41 * contributed to Berkeley.
42 *
43 * All advertising materials mentioning features or use of this software
44 * must display the following acknowledgement:
45 * This product includes software developed by the University of
46 * California, Lawrence Berkeley Laboratory.
47 *
48 * Redistribution and use in source and binary forms, with or without
49 * modification, are permitted provided that the following conditions
50 * are met:
51 * 1. Redistributions of source code must retain the above copyright
52 * notice, this list of conditions and the following disclaimer.
53 * 2. Redistributions in binary form must reproduce the above copyright
54 * notice, this list of conditions and the following disclaimer in the
55 * documentation and/or other materials provided with the distribution.
56 * 3. Neither the name of the University nor the names of its contributors
57 * may be used to endorse or promote products derived from this software
58 * without specific prior written permission.
59 *
60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
70 * SUCH DAMAGE.
71 *
72 * @(#)zs.c 8.1 (Berkeley) 7/19/93
73 */
74
75 /*
76 * Zilog Z8530 Dual UART driver (tty interface)
77 *
78 * This is the "slave" driver that will be attached to
79 * the "zsc" driver for plain "tty" async. serial lines.
80 *
81 * Credits, history:
82 *
83 * The original version of this code was the sparc/dev/zs.c driver
84 * as distributed with the Berkeley 4.4 Lite release. Since then,
85 * Gordon Ross reorganized the code into the current parent/child
86 * driver scheme, separating the Sun keyboard and mouse support
87 * into independent child drivers.
88 *
89 * RTS/CTS flow-control support was a collaboration of:
90 * Gordon Ross <gwr@netbsd.org>,
91 * Bill Studenmund <wrstuden@loki.stanford.edu>
92 * Ian Dall <Ian.Dall@dsto.defence.gov.au>
93 *
94 * The driver was massively overhauled in November 1997 by Charles Hannum,
95 * fixing *many* bugs, and substantially improving performance.
96 */
97
98 #include <sys/param.h>
99 #include <sys/systm.h>
100 #include <sys/proc.h>
101 #include <sys/device.h>
102 #include <sys/conf.h>
103 #include <sys/ioctl.h>
104 #include <sys/malloc.h>
105 #include <sys/tty.h>
106 #include <sys/time.h>
107 #include <sys/kernel.h>
108 #include <sys/syslog.h>
109
110 #include <machine/autoconf.h>
111
112 #include <dev/wscons/wsconsio.h>
113 #include <dev/wscons/wskbdvar.h>
114
115 #include <dev/sun/sunkbdreg.h>
116 #include <dev/sun/sunkbdvar.h>
117
118 #include <dev/ic/z8530reg.h>
119 #include <machine/z8530var.h>
120
121 #include <dev/cons.h>
122
123 /*
124 * How many input characters we can buffer.
125 * The port-specific var.h may override this.
126 * Note: must be a power of two!
127 */
128 #ifndef ZSKBD_RING_SIZE
129 #define ZSKBD_RING_SIZE 2048
130 #endif
131
132 struct cfdriver zskbd_cd = {
133 NULL, "zskbd", DV_TTY
134 };
135
136 /*
137 * Make this an option variable one can patch.
138 * But be warned: this must be a power of 2!
139 */
140 u_int zskbd_rbuf_size = ZSKBD_RING_SIZE;
141
142 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */
143 u_int zskbd_rbuf_hiwat = (ZSKBD_RING_SIZE * 1) / 4;
144 u_int zskbd_rbuf_lowat = (ZSKBD_RING_SIZE * 3) / 4;
145
146 struct zskbd_softc {
147 struct sunkbd_softc sc_base;
148
149 struct zs_chanstate *zst_cs;
150
151 struct timeout zst_diag_ch;
152
153 u_int zst_overflows,
154 zst_floods,
155 zst_errors;
156
157 int zst_hwflags, /* see z8530var.h */
158 zst_swflags; /* TIOCFLAG_SOFTCAR, ... <ttycom.h> */
159
160 u_int zst_r_hiwat,
161 zst_r_lowat;
162 u_char *volatile zst_rbget,
163 *volatile zst_rbput;
164 volatile u_int zst_rbavail;
165 u_char *zst_rbuf,
166 *zst_ebuf;
167
168 /*
169 * The transmit byte count and address are used for pseudo-DMA
170 * output in the hardware interrupt code. PDMA can be suspended
171 * to get pending changes done; heldtbc is used for this. It can
172 * also be stopped for ^S; this sets TS_TTSTOP in tp->t_state.
173 */
174 u_char *zst_tba; /* transmit buffer address */
175 u_int zst_tbc, /* transmit byte count */
176 zst_heldtbc; /* held tbc while xmission stopped */
177
178 u_char zst_tbuf[ZSKBD_RING_SIZE];
179 u_char *zst_tbeg, *zst_tend, *zst_tbp;
180
181 /* Flags to communicate with zskbd_softint() */
182 volatile u_char zst_rx_flags, /* receiver blocked */
183 #define RX_TTY_BLOCKED 0x01
184 #define RX_TTY_OVERFLOWED 0x02
185 #define RX_IBUF_BLOCKED 0x04
186 #define RX_IBUF_OVERFLOWED 0x08
187 #define RX_ANY_BLOCK 0x0f
188 zst_tx_busy, /* working on an output chunk */
189 zst_tx_done, /* done with one output chunk */
190 zst_tx_stopped, /* H/W level stop (lost CTS) */
191 zst_st_check, /* got a status interrupt */
192 zst_rx_ready;
193
194 /* PPS signal on DCD, with or without inkernel clock disciplining */
195 u_char zst_ppsmask; /* pps signal mask */
196 u_char zst_ppsassert; /* pps leading edge */
197 u_char zst_ppsclear; /* pps trailing edge */
198 };
199
200 /* Definition of the driver for autoconfig. */
201 static int zskbd_match(struct device *, void *, void *);
202 static void zskbd_attach(struct device *, struct device *, void *);
203
204 const struct cfattach zskbd_ca = {
205 sizeof(struct zskbd_softc), zskbd_match, zskbd_attach
206 };
207
208 struct zsops zsops_kbd;
209
210 static void zs_modem(struct zskbd_softc *, int);
211 static void zs_hwiflow(struct zskbd_softc *);
212 static void zs_maskintr(struct zskbd_softc *);
213
214 /* Low-level routines. */
215 static void zskbd_rxint(struct zs_chanstate *);
216 static void zskbd_stint(struct zs_chanstate *, int);
217 static void zskbd_txint(struct zs_chanstate *);
218 static void zskbd_softint(struct zs_chanstate *);
219 static void zskbd_diag(void *);
220
221 int zskbd_init(struct zskbd_softc *);
222 void zskbd_putc(struct zskbd_softc *, u_int8_t);
223
224 /* wskbd glue */
225 void zskbd_cngetc(void *, u_int *, int *);
226 void zskbd_cnpollc(void *, int);
227
228 void zsstart_tx(struct zskbd_softc *);
229 int zsenqueue_tx(void *, u_int8_t *, u_int);
230
231 struct wskbd_consops zskbd_consops = {
232 zskbd_cngetc,
233 zskbd_cnpollc
234 };
235
236 #define ZSKBDUNIT(x) (minor(x) & 0x7ffff)
237
238 /*
239 * zskbd_match: how is this zs channel configured?
240 */
241 int
zskbd_match(struct device * parent,void * vcf,void * aux)242 zskbd_match(struct device *parent, void *vcf, void *aux)
243 {
244 struct cfdata *cf = vcf;
245 struct zsc_attach_args *args = aux;
246 int ret;
247
248 /* If we're not looking for a keyboard, just exit */
249 if (strcmp(args->type, "keyboard") != 0)
250 return (0);
251
252 ret = 10;
253
254 /* Exact match is better than wildcard. */
255 if (cf->cf_loc[ZSCCF_CHANNEL] == args->channel)
256 ret += 2;
257
258 /* This driver accepts wildcard. */
259 if (cf->cf_loc[ZSCCF_CHANNEL] == ZSCCF_CHANNEL_DEFAULT)
260 ret += 1;
261
262 return (ret);
263 }
264
265 void
zskbd_attach(struct device * parent,struct device * self,void * aux)266 zskbd_attach(struct device *parent, struct device *self, void *aux)
267 {
268 struct zsc_softc *zsc = (void *)parent;
269 struct zskbd_softc *zst = (void *)self;
270 struct sunkbd_softc *ss = (void *)self;
271 struct cfdata *cf = self->dv_cfdata;
272 struct zsc_attach_args *args = aux;
273 struct wskbddev_attach_args a;
274 struct zs_chanstate *cs;
275 int channel, s, tty_unit, console = 0;
276 dev_t dev;
277
278 ss->sc_sendcmd = zsenqueue_tx;
279 timeout_set(&ss->sc_bellto, sunkbd_bellstop, zst);
280
281 timeout_set(&zst->zst_diag_ch, zskbd_diag, zst);
282
283 zst->zst_tbp = zst->zst_tba = zst->zst_tbeg = zst->zst_tbuf;
284 zst->zst_tend = zst->zst_tbeg + ZSKBD_RING_SIZE;
285
286 tty_unit = ss->sc_dev.dv_unit;
287 channel = args->channel;
288 cs = zsc->zsc_cs[channel];
289 cs->cs_private = zst;
290 cs->cs_ops = &zsops_kbd;
291
292 zst->zst_cs = cs;
293 zst->zst_swflags = cf->cf_flags; /* softcar, etc. */
294 zst->zst_hwflags = args->hwflags;
295 dev = makedev(zs_major, tty_unit);
296
297 if (zst->zst_swflags)
298 printf(" flags 0x%x", zst->zst_swflags);
299
300 /*
301 * Check whether we serve as a console device.
302 * XXX - split console input/output channels aren't
303 * supported yet on /dev/console
304 */
305 if ((zst->zst_hwflags & ZS_HWFLAG_CONSOLE_INPUT) != 0) {
306 if ((args->hwflags & ZS_HWFLAG_USE_CONSDEV) != 0) {
307 args->consdev->cn_dev = dev;
308 cn_tab->cn_pollc = wskbd_cnpollc;
309 cn_tab->cn_getc = wskbd_cngetc;
310 }
311 cn_tab->cn_dev = dev;
312 console = 1;
313 }
314
315 zst->zst_rbuf = malloc(zskbd_rbuf_size << 1, M_DEVBUF, M_WAITOK);
316 zst->zst_ebuf = zst->zst_rbuf + (zskbd_rbuf_size << 1);
317 /* Disable the high water mark. */
318 zst->zst_r_hiwat = 0;
319 zst->zst_r_lowat = 0;
320 zst->zst_rbget = zst->zst_rbput = zst->zst_rbuf;
321 zst->zst_rbavail = zskbd_rbuf_size;
322
323 /* if there are no enable/disable functions, assume the device
324 is always enabled */
325 if (!cs->enable)
326 cs->enabled = 1;
327
328 /*
329 * Hardware init
330 */
331 if (ISSET(zst->zst_hwflags, ZS_HWFLAG_CONSOLE)) {
332 /* Call zsparam similar to open. */
333
334 /* Wait a while for previous console output to complete */
335 DELAY(10000);
336 } else if (!ISSET(zst->zst_hwflags, ZS_HWFLAG_NORESET)) {
337 /* Not the console; may need reset. */
338 int reset;
339
340 reset = (channel == 0) ? ZSWR9_A_RESET : ZSWR9_B_RESET;
341 s = splzs();
342 zs_write_reg(cs, 9, reset);
343 splx(s);
344 }
345
346 /*
347 * Probe for a keyboard.
348 * If one is found, turn on receiver and status interrupts.
349 * We defer the actual write of the register to zsparam(),
350 * but we must make sure status interrupts are turned on by
351 * the time zsparam() reads the initial rr0 state.
352 */
353 if (zskbd_init(zst)) {
354 SET(cs->cs_preg[1], ZSWR1_RIE | ZSWR1_SIE);
355 zs_write_reg(cs, 1, cs->cs_creg[1]);
356
357 /* Make sure DTR is on now. */
358 s = splzs();
359 zs_modem(zst, 1);
360 splx(s);
361 } else {
362 /* Will raise DTR in open. */
363 s = splzs();
364 zs_modem(zst, 0);
365 splx(s);
366
367 return;
368 }
369
370 ss->sc_click =
371 strcmp(getpropstring(optionsnode, "keyboard-click?"), "true") == 0;
372 sunkbd_setclick(ss, ss->sc_click);
373
374 a.console = console;
375 if (ISTYPE5(ss->sc_layout)) {
376 a.keymap = &sunkbd5_keymapdata;
377 #ifndef SUNKBD5_LAYOUT
378 if (ss->sc_layout < MAXSUNLAYOUT &&
379 sunkbd_layouts[ss->sc_layout] != -1)
380 sunkbd5_keymapdata.layout =
381 sunkbd_layouts[ss->sc_layout];
382 #endif
383 } else {
384 a.keymap = &sunkbd_keymapdata;
385 #ifndef SUNKBD_LAYOUT
386 if (ss->sc_layout < MAXSUNLAYOUT &&
387 sunkbd_layouts[ss->sc_layout] != -1)
388 sunkbd_keymapdata.layout =
389 sunkbd_layouts[ss->sc_layout];
390 #endif
391 }
392 a.accessops = &sunkbd_accessops;
393 a.accesscookie = zst;
394
395 if (console)
396 wskbd_cnattach(&zskbd_consops, zst, a.keymap);
397
398 sunkbd_attach(ss, &a);
399 }
400
401 int
zskbd_init(struct zskbd_softc * zst)402 zskbd_init(struct zskbd_softc *zst)
403 {
404 struct sunkbd_softc *ss = (void *)zst;
405 struct zs_chanstate *cs = zst->zst_cs;
406 int s, tries;
407 u_int8_t v3, v4, v5, rr0;
408
409 /* setup for 1200n81 */
410 if (zs_set_speed(cs, 1200)) { /* set 1200bps */
411 printf(": failed to set baudrate\n");
412 return 0;
413 }
414 if (zs_set_modes(cs, CS8 | CLOCAL)) {
415 printf(": failed to set modes\n");
416 return 0;
417 }
418
419 s = splzs();
420
421 zs_maskintr(zst);
422
423 v3 = cs->cs_preg[3]; /* set 8 bit chars */
424 v5 = cs->cs_preg[5];
425 CLR(v3, ZSWR3_RXSIZE);
426 CLR(v5, ZSWR5_TXSIZE);
427 SET(v3, ZSWR3_RX_8);
428 SET(v5, ZSWR5_TX_8);
429 cs->cs_preg[3] = v3;
430 cs->cs_preg[5] = v5;
431
432 v4 = cs->cs_preg[4]; /* no parity 1 stop */
433 CLR(v4, ZSWR4_SBMASK | ZSWR4_PARMASK);
434 SET(v4, ZSWR4_ONESB | ZSWR4_EVENP);
435 cs->cs_preg[4] = v4;
436
437 if (!cs->cs_heldchange) {
438 if (zst->zst_tx_busy) {
439 zst->zst_heldtbc = zst->zst_tbc;
440 zst->zst_tbc = 0;
441 cs->cs_heldchange = 1;
442 } else
443 zs_loadchannelregs(cs);
444 }
445
446 /*
447 * Hardware flow control is disabled, turn off the buffer water
448 * marks and unblock any soft flow control state. Otherwise, enable
449 * the water marks.
450 */
451 zst->zst_r_hiwat = 0;
452 zst->zst_r_lowat = 0;
453 if (ISSET(zst->zst_rx_flags, RX_TTY_OVERFLOWED)) {
454 CLR(zst->zst_rx_flags, RX_TTY_OVERFLOWED);
455 zst->zst_rx_ready = 1;
456 cs->cs_softreq = 1;
457 }
458 if (ISSET(zst->zst_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) {
459 CLR(zst->zst_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED);
460 zs_hwiflow(zst);
461 }
462
463 /*
464 * Force a recheck of the hardware carrier and flow control status,
465 * since we may have changed which bits we're looking at.
466 */
467 zskbd_stint(cs, 1);
468
469 splx(s);
470
471 /*
472 * Hardware flow control is disabled, unblock any hard flow control
473 * state.
474 */
475 if (zst->zst_tx_stopped) {
476 zst->zst_tx_stopped = 0;
477 zsstart_tx(zst);
478 }
479
480 zskbd_softint(cs);
481
482 /* Ok, start the reset sequence... */
483
484 s = splhigh();
485
486 for (tries = 5; tries != 0; tries--) {
487 int ltries;
488
489 ss->sc_leds = 0;
490 ss->sc_layout = -1;
491
492 /* Send reset request */
493 zskbd_putc(zst, SKBD_CMD_RESET);
494
495 ltries = 1000;
496 while (--ltries > 0) {
497 rr0 = *cs->cs_reg_csr;
498 if (rr0 & ZSRR0_RX_READY) {
499 sunkbd_raw(ss, *cs->cs_reg_data);
500 if (ss->sc_kbdstate == SKBD_STATE_RESET)
501 break;
502 }
503 DELAY(1000);
504 }
505 if (ltries == 0)
506 continue;
507
508 /* Wait for reset to finish. */
509 ltries = 1000;
510 while (--ltries > 0) {
511 rr0 = *cs->cs_reg_csr;
512 if (rr0 & ZSRR0_RX_READY) {
513 sunkbd_raw(ss, *cs->cs_reg_data);
514 if (ss->sc_kbdstate == SKBD_STATE_GETKEY)
515 break;
516 }
517 DELAY(1000);
518 }
519 if (ltries == 0)
520 continue;
521
522 /* Some Sun<=>PS/2 converters need some delay here */
523 DELAY(5000);
524
525 /* Send layout request */
526 zskbd_putc(zst, SKBD_CMD_LAYOUT);
527
528 ltries = 1000;
529 while (--ltries > 0) {
530 rr0 = *cs->cs_reg_csr;
531 if (rr0 & ZSRR0_RX_READY) {
532 sunkbd_raw(ss, *cs->cs_reg_data);
533 if (ss->sc_layout != -1)
534 break;
535 }
536 DELAY(1000);
537 }
538 if (ltries == 0)
539 continue;
540 break;
541 }
542 if (tries == 0)
543 printf(": no keyboard\n");
544 else
545 printf(": layout %d\n", ss->sc_layout);
546 splx(s);
547
548 return tries;
549 }
550
551 void
zskbd_putc(struct zskbd_softc * zst,u_int8_t c)552 zskbd_putc(struct zskbd_softc *zst, u_int8_t c)
553 {
554 u_int8_t rr0;
555 int s;
556
557 s = splhigh();
558 do {
559 rr0 = *zst->zst_cs->cs_reg_csr;
560 } while ((rr0 & ZSRR0_TX_READY) == 0);
561 *zst->zst_cs->cs_reg_data = c;
562 delay(2);
563 splx(s);
564 }
565
566 int
zsenqueue_tx(void * v,u_int8_t * str,u_int len)567 zsenqueue_tx(void *v, u_int8_t *str, u_int len)
568 {
569 struct zskbd_softc *zst = v;
570 int s;
571 u_int i;
572
573 s = splzs();
574 if (zst->zst_tbc + len > ZSKBD_RING_SIZE) {
575 splx(s);
576 return (-1);
577 }
578 zst->zst_tbc += len;
579 for (i = 0; i < len; i++) {
580 *zst->zst_tbp = str[i];
581 if (++zst->zst_tbp == zst->zst_tend)
582 zst->zst_tbp = zst->zst_tbeg;
583 }
584 splx(s);
585 zsstart_tx(zst);
586 return (0);
587 }
588
589 void
zsstart_tx(struct zskbd_softc * zst)590 zsstart_tx(struct zskbd_softc *zst)
591 {
592 struct zs_chanstate *cs = zst->zst_cs;
593 int s, s1;
594
595 s = spltty();
596
597 if (zst->zst_tx_stopped)
598 goto out;
599 if (zst->zst_tbc == 0)
600 goto out;
601
602 s1 = splzs();
603
604 zst->zst_tx_busy = 1;
605
606 if (!ISSET(cs->cs_preg[1], ZSWR1_TIE)) {
607 SET(cs->cs_preg[1], ZSWR1_TIE);
608 cs->cs_creg[1] = cs->cs_preg[1];
609 zs_write_reg(cs, 1, cs->cs_creg[1]);
610 }
611
612 zs_write_data(cs, *zst->zst_tba);
613
614 zst->zst_tbc--;
615 if (++zst->zst_tba == zst->zst_tend)
616 zst->zst_tba = zst->zst_tbeg;
617
618 splx(s1);
619
620 out:
621 splx(s);
622 }
623
624 /*
625 * Compute interrupt enable bits and set in the pending bits. Called both
626 * in zsparam() and when PPS (pulse per second timing) state changes.
627 * Must be called at splzs().
628 */
629 static void
zs_maskintr(struct zskbd_softc * zst)630 zs_maskintr(struct zskbd_softc *zst)
631 {
632 struct zs_chanstate *cs = zst->zst_cs;
633 int tmp15;
634
635 cs->cs_rr0_mask = cs->cs_rr0_cts | cs->cs_rr0_dcd;
636 if (zst->zst_ppsmask != 0)
637 cs->cs_rr0_mask |= cs->cs_rr0_pps;
638 tmp15 = cs->cs_preg[15];
639 if (ISSET(cs->cs_rr0_mask, ZSRR0_DCD))
640 SET(tmp15, ZSWR15_DCD_IE);
641 else
642 CLR(tmp15, ZSWR15_DCD_IE);
643 if (ISSET(cs->cs_rr0_mask, ZSRR0_CTS))
644 SET(tmp15, ZSWR15_CTS_IE);
645 else
646 CLR(tmp15, ZSWR15_CTS_IE);
647 cs->cs_preg[15] = tmp15;
648 }
649
650
651 /*
652 * Raise or lower modem control (DTR/RTS) signals. If a character is
653 * in transmission, the change is deferred.
654 */
655 static void
zs_modem(struct zskbd_softc * zst,int onoff)656 zs_modem(struct zskbd_softc *zst, int onoff)
657 {
658 struct zs_chanstate *cs = zst->zst_cs;
659
660 if (cs->cs_wr5_dtr == 0)
661 return;
662
663 if (onoff)
664 SET(cs->cs_preg[5], cs->cs_wr5_dtr);
665 else
666 CLR(cs->cs_preg[5], cs->cs_wr5_dtr);
667
668 if (!cs->cs_heldchange) {
669 if (zst->zst_tx_busy) {
670 zst->zst_heldtbc = zst->zst_tbc;
671 zst->zst_tbc = 0;
672 cs->cs_heldchange = 1;
673 } else
674 zs_loadchannelregs(cs);
675 }
676 }
677
678 /*
679 * Internal version of zshwiflow
680 * called at splzs
681 */
682 static void
zs_hwiflow(struct zskbd_softc * zst)683 zs_hwiflow(struct zskbd_softc *zst)
684 {
685 struct zs_chanstate *cs = zst->zst_cs;
686
687 if (cs->cs_wr5_rts == 0)
688 return;
689
690 if (ISSET(zst->zst_rx_flags, RX_ANY_BLOCK)) {
691 CLR(cs->cs_preg[5], cs->cs_wr5_rts);
692 CLR(cs->cs_creg[5], cs->cs_wr5_rts);
693 } else {
694 SET(cs->cs_preg[5], cs->cs_wr5_rts);
695 SET(cs->cs_creg[5], cs->cs_wr5_rts);
696 }
697 zs_write_reg(cs, 5, cs->cs_creg[5]);
698 }
699
700
701 /****************************************************************
702 * Interface to the lower layer (zscc)
703 ****************************************************************/
704
705 #define integrate
706 integrate void zskbd_rxsoft(struct zskbd_softc *);
707 integrate void zskbd_txsoft(struct zskbd_softc *);
708 integrate void zskbd_stsoft(struct zskbd_softc *);
709 /*
710 * receiver ready interrupt.
711 * called at splzs
712 */
713 static void
zskbd_rxint(struct zs_chanstate * cs)714 zskbd_rxint(struct zs_chanstate *cs)
715 {
716 struct zskbd_softc *zst = cs->cs_private;
717 u_char *put, *end;
718 u_int cc;
719 u_char rr0, rr1, c;
720
721 end = zst->zst_ebuf;
722 put = zst->zst_rbput;
723 cc = zst->zst_rbavail;
724
725 while (cc > 0) {
726 /*
727 * First read the status, because reading the received char
728 * destroys the status of this char.
729 */
730 rr1 = zs_read_reg(cs, 1);
731 c = zs_read_data(cs);
732
733 if (ISSET(rr1, ZSRR1_FE | ZSRR1_DO | ZSRR1_PE)) {
734 /* Clear the receive error. */
735 zs_write_csr(cs, ZSWR0_RESET_ERRORS);
736 }
737
738 put[0] = c;
739 put[1] = rr1;
740 put += 2;
741 if (put >= end)
742 put = zst->zst_rbuf;
743 cc--;
744
745 rr0 = zs_read_csr(cs);
746 if (!ISSET(rr0, ZSRR0_RX_READY))
747 break;
748 }
749
750 /*
751 * Current string of incoming characters ended because
752 * no more data was available or we ran out of space.
753 * Schedule a receive event if any data was received.
754 * If we're out of space, turn off receive interrupts.
755 */
756 zst->zst_rbput = put;
757 zst->zst_rbavail = cc;
758 if (!ISSET(zst->zst_rx_flags, RX_TTY_OVERFLOWED)) {
759 zst->zst_rx_ready = 1;
760 cs->cs_softreq = 1;
761 }
762
763 /*
764 * See if we are in danger of overflowing a buffer. If
765 * so, use hardware flow control to ease the pressure.
766 */
767 if (!ISSET(zst->zst_rx_flags, RX_IBUF_BLOCKED) &&
768 cc < zst->zst_r_hiwat) {
769 SET(zst->zst_rx_flags, RX_IBUF_BLOCKED);
770 zs_hwiflow(zst);
771 }
772
773 /*
774 * If we're out of space, disable receive interrupts
775 * until the queue has drained a bit.
776 */
777 if (!cc) {
778 SET(zst->zst_rx_flags, RX_IBUF_OVERFLOWED);
779 CLR(cs->cs_preg[1], ZSWR1_RIE);
780 cs->cs_creg[1] = cs->cs_preg[1];
781 zs_write_reg(cs, 1, cs->cs_creg[1]);
782 }
783 }
784
785 /*
786 * transmitter ready interrupt. (splzs)
787 */
788 static void
zskbd_txint(struct zs_chanstate * cs)789 zskbd_txint(struct zs_chanstate *cs)
790 {
791 struct zskbd_softc *zst = cs->cs_private;
792
793 /*
794 * If we've delayed a parameter change, do it now, and restart
795 * output.
796 */
797 if (cs->cs_heldchange) {
798 zs_loadchannelregs(cs);
799 cs->cs_heldchange = 0;
800 zst->zst_tbc = zst->zst_heldtbc;
801 zst->zst_heldtbc = 0;
802 }
803
804 /* Output the next character in the buffer, if any. */
805 if (zst->zst_tbc > 0) {
806 zs_write_data(cs, *zst->zst_tba);
807 zst->zst_tbc--;
808 if (++zst->zst_tba == zst->zst_tend)
809 zst->zst_tba = zst->zst_tbeg;
810 } else {
811 /* Disable transmit completion interrupts if necessary. */
812 if (ISSET(cs->cs_preg[1], ZSWR1_TIE)) {
813 CLR(cs->cs_preg[1], ZSWR1_TIE);
814 cs->cs_creg[1] = cs->cs_preg[1];
815 zs_write_reg(cs, 1, cs->cs_creg[1]);
816 }
817 if (zst->zst_tx_busy) {
818 zst->zst_tx_busy = 0;
819 zst->zst_tx_done = 1;
820 cs->cs_softreq = 1;
821 }
822 }
823 }
824
825 /*
826 * status change interrupt. (splzs)
827 */
828 static void
zskbd_stint(struct zs_chanstate * cs,int force)829 zskbd_stint(struct zs_chanstate *cs, int force)
830 {
831 struct zskbd_softc *zst = cs->cs_private;
832 u_char rr0, delta;
833
834 rr0 = zs_read_csr(cs);
835 zs_write_csr(cs, ZSWR0_RESET_STATUS);
836
837 /*
838 * Check here for console break, so that we can abort
839 * even when interrupts are locking up the machine.
840 */
841 if (!force)
842 delta = rr0 ^ cs->cs_rr0;
843 else
844 delta = cs->cs_rr0_mask;
845 cs->cs_rr0 = rr0;
846
847 if (ISSET(delta, cs->cs_rr0_mask)) {
848 SET(cs->cs_rr0_delta, delta);
849
850 /*
851 * Stop output immediately if we lose the output
852 * flow control signal or carrier detect.
853 */
854 if (ISSET(~rr0, cs->cs_rr0_mask)) {
855 zst->zst_tbc = 0;
856 zst->zst_heldtbc = 0;
857 }
858
859 zst->zst_st_check = 1;
860 cs->cs_softreq = 1;
861 }
862 }
863
864 void
zskbd_diag(void * arg)865 zskbd_diag(void *arg)
866 {
867 struct zskbd_softc *zst = arg;
868 struct sunkbd_softc *ss = arg;
869 int overflows, floods;
870 int s;
871
872 s = splzs();
873 overflows = zst->zst_overflows;
874 zst->zst_overflows = 0;
875 floods = zst->zst_floods;
876 zst->zst_floods = 0;
877 zst->zst_errors = 0;
878 splx(s);
879
880 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n",
881 ss->sc_dev.dv_xname,
882 overflows, overflows == 1 ? "" : "s",
883 floods, floods == 1 ? "" : "s");
884 }
885
886 integrate void
zskbd_rxsoft(struct zskbd_softc * zst)887 zskbd_rxsoft(struct zskbd_softc *zst)
888 {
889 struct sunkbd_softc *ss = (void *)zst;
890 struct zs_chanstate *cs = zst->zst_cs;
891 u_char *get, *end;
892 u_int cc, scc;
893 u_char rr1;
894 int code;
895 int s;
896 u_int8_t cbuf[SUNKBD_MAX_INPUT_SIZE], *c;
897
898 end = zst->zst_ebuf;
899 get = zst->zst_rbget;
900 scc = cc = zskbd_rbuf_size - zst->zst_rbavail;
901
902 if (cc == zskbd_rbuf_size) {
903 zst->zst_floods++;
904 if (zst->zst_errors++ == 0)
905 timeout_add_sec(&zst->zst_diag_ch, 60);
906 }
907
908 c = cbuf;
909 while (cc) {
910 code = get[0];
911 rr1 = get[1];
912 if (ISSET(rr1, ZSRR1_DO | ZSRR1_FE | ZSRR1_PE)) {
913 if (ISSET(rr1, ZSRR1_DO)) {
914 zst->zst_overflows++;
915 if (zst->zst_errors++ == 0)
916 timeout_add_sec(&zst->zst_diag_ch, 60);
917 }
918 if (ISSET(rr1, ZSRR1_FE))
919 SET(code, TTY_FE);
920 if (ISSET(rr1, ZSRR1_PE))
921 SET(code, TTY_PE);
922 }
923
924 *c++ = code;
925 if (c - cbuf == sizeof cbuf) {
926 sunkbd_input(ss, cbuf, c - cbuf);
927 c = cbuf;
928 }
929
930 get += 2;
931 if (get >= end)
932 get = zst->zst_rbuf;
933 cc--;
934 }
935 if (c != cbuf)
936 sunkbd_input(ss, cbuf, c - cbuf);
937
938 if (cc != scc) {
939 zst->zst_rbget = get;
940 s = splzs();
941 cc = zst->zst_rbavail += scc - cc;
942 /* Buffers should be ok again, release possible block. */
943 if (cc >= zst->zst_r_lowat) {
944 if (ISSET(zst->zst_rx_flags, RX_IBUF_OVERFLOWED)) {
945 CLR(zst->zst_rx_flags, RX_IBUF_OVERFLOWED);
946 SET(cs->cs_preg[1], ZSWR1_RIE);
947 cs->cs_creg[1] = cs->cs_preg[1];
948 zs_write_reg(cs, 1, cs->cs_creg[1]);
949 }
950 if (ISSET(zst->zst_rx_flags, RX_IBUF_BLOCKED)) {
951 CLR(zst->zst_rx_flags, RX_IBUF_BLOCKED);
952 zs_hwiflow(zst);
953 }
954 }
955 splx(s);
956 }
957 }
958
959 integrate void
zskbd_txsoft(struct zskbd_softc * zst)960 zskbd_txsoft(struct zskbd_softc *zst)
961 {
962 }
963
964 integrate void
zskbd_stsoft(struct zskbd_softc * zst)965 zskbd_stsoft(struct zskbd_softc *zst)
966 {
967 struct zs_chanstate *cs = zst->zst_cs;
968 u_char rr0, delta;
969 int s;
970
971 s = splzs();
972 rr0 = cs->cs_rr0;
973 delta = cs->cs_rr0_delta;
974 cs->cs_rr0_delta = 0;
975 splx(s);
976
977 if (ISSET(delta, cs->cs_rr0_cts)) {
978 /* Block or unblock output according to flow control. */
979 if (ISSET(rr0, cs->cs_rr0_cts))
980 zst->zst_tx_stopped = 0;
981 else
982 zst->zst_tx_stopped = 1;
983 }
984 }
985
986 /*
987 * Software interrupt. Called at zssoft
988 *
989 * The main job to be done here is to empty the input ring
990 * by passing its contents up to the tty layer. The ring is
991 * always emptied during this operation, therefore the ring
992 * must not be larger than the space after "high water" in
993 * the tty layer, or the tty layer might drop our input.
994 *
995 * Note: an "input blockage" condition is assumed to exist if
996 * EITHER the TS_TBLOCK flag or zst_rx_blocked flag is set.
997 */
998 static void
zskbd_softint(struct zs_chanstate * cs)999 zskbd_softint(struct zs_chanstate *cs)
1000 {
1001 struct zskbd_softc *zst = cs->cs_private;
1002 int s;
1003
1004 s = spltty();
1005
1006 if (zst->zst_rx_ready) {
1007 zst->zst_rx_ready = 0;
1008 zskbd_rxsoft(zst);
1009 }
1010
1011 if (zst->zst_st_check) {
1012 zst->zst_st_check = 0;
1013 zskbd_stsoft(zst);
1014 }
1015
1016 if (zst->zst_tx_done) {
1017 zst->zst_tx_done = 0;
1018 zskbd_txsoft(zst);
1019 }
1020
1021 splx(s);
1022 }
1023
1024 struct zsops zsops_kbd = {
1025 zskbd_rxint, /* receive char available */
1026 zskbd_stint, /* external/status */
1027 zskbd_txint, /* xmit buffer empty */
1028 zskbd_softint, /* process software interrupt */
1029 };
1030
1031 void
zskbd_cnpollc(void * v,int on)1032 zskbd_cnpollc(void *v, int on)
1033 {
1034 }
1035
1036 void
zskbd_cngetc(void * v,u_int * type,int * data)1037 zskbd_cngetc(void *v, u_int *type, int *data)
1038 {
1039 struct zskbd_softc *zst = v;
1040 int s;
1041 u_int8_t c, rr0;
1042
1043 s = splhigh();
1044 do {
1045 rr0 = *zst->zst_cs->cs_reg_csr;
1046 } while ((rr0 & ZSRR0_RX_READY) == 0);
1047
1048 c = *zst->zst_cs->cs_reg_data;
1049 splx(s);
1050
1051 sunkbd_decode(c, type, data);
1052 }
1053