Annotation of sys/arch/sparc/dev/z8530kbd.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: z8530kbd.c,v 1.9 2007/05/25 21:27:15 krw 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/file.h>
104: #include <sys/ioctl.h>
105: #include <sys/malloc.h>
106: #include <sys/tty.h>
107: #include <sys/time.h>
108: #include <sys/kernel.h>
109: #include <sys/syslog.h>
110:
111: #include <machine/autoconf.h>
112: #include <machine/conf.h>
113:
114: #include <dev/wscons/wsconsio.h>
115: #include <dev/wscons/wskbdvar.h>
116:
117: #include <dev/sun/sunkbdreg.h>
118: #include <dev/sun/sunkbdvar.h>
119:
120: #include <sparc/dev/z8530reg.h>
121: #include <machine/z8530var.h>
122:
123: #include <dev/cons.h>
124:
125: /*
126: * How many input characters we can buffer.
127: * The port-specific var.h may override this.
128: * Note: must be a power of two!
129: */
130: #ifndef ZSKBD_RING_SIZE
131: #define ZSKBD_RING_SIZE 2048
132: #endif
133:
134: struct cfdriver zskbd_cd = {
135: NULL, "zskbd", DV_TTY
136: };
137:
138: /*
139: * Make this an option variable one can patch.
140: * But be warned: this must be a power of 2!
141: */
142: u_int zskbd_rbuf_size = ZSKBD_RING_SIZE;
143:
144: /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */
145: u_int zskbd_rbuf_hiwat = (ZSKBD_RING_SIZE * 1) / 4;
146: u_int zskbd_rbuf_lowat = (ZSKBD_RING_SIZE * 3) / 4;
147:
148: struct zskbd_softc {
149: struct sunkbd_softc zst_base;
150:
151: struct zs_chanstate *zst_cs;
152:
153: struct timeout zst_diag_ch;
154:
155: u_int zst_overflows,
156: zst_floods,
157: zst_errors;
158:
159: int zst_hwflags, /* see z8530var.h */
160: zst_swflags; /* TIOCFLAG_SOFTCAR, ... <ttycom.h> */
161:
162: u_int zst_r_hiwat,
163: zst_r_lowat;
164: u_char *volatile zst_rbget,
165: *volatile zst_rbput;
166: volatile u_int zst_rbavail;
167: u_char *zst_rbuf,
168: *zst_ebuf;
169:
170: /*
171: * The transmit byte count and address are used for pseudo-DMA
172: * output in the hardware interrupt code. PDMA can be suspended
173: * to get pending changes done; heldtbc is used for this. It can
174: * also be stopped for ^S; this sets TS_TTSTOP in tp->t_state.
175: */
176: u_char *zst_tba; /* transmit buffer address */
177: u_int zst_tbc, /* transmit byte count */
178: zst_heldtbc; /* held tbc while xmission stopped */
179:
180: u_char zst_tbuf[ZSKBD_RING_SIZE];
181: u_char *zst_tbeg, *zst_tend, *zst_tbp;
182:
183: /* Flags to communicate with zskbd_softint() */
184: volatile u_char zst_rx_flags, /* receiver blocked */
185: #define RX_TTY_BLOCKED 0x01
186: #define RX_TTY_OVERFLOWED 0x02
187: #define RX_IBUF_BLOCKED 0x04
188: #define RX_IBUF_OVERFLOWED 0x08
189: #define RX_ANY_BLOCK 0x0f
190: zst_tx_busy, /* working on an output chunk */
191: zst_tx_done, /* done with one output chunk */
192: zst_tx_stopped, /* H/W level stop (lost CTS) */
193: zst_st_check, /* got a status interrupt */
194: zst_rx_ready;
195:
196: /* PPS signal on DCD, with or without inkernel clock disciplining */
197: u_char zst_ppsmask; /* pps signal mask */
198: u_char zst_ppsassert; /* pps leading edge */
199: u_char zst_ppsclear; /* pps trailing edge */
200: };
201:
202: /* Definition of the driver for autoconfig. */
203: static int zskbd_match(struct device *, void *, void *);
204: static void zskbd_attach(struct device *, struct device *, void *);
205:
206: struct cfattach zskbd_ca = {
207: sizeof(struct zskbd_softc), zskbd_match, zskbd_attach
208: };
209:
210: struct zsops zsops_kbd;
211:
212: static void zs_modem(struct zskbd_softc *, int);
213: static void zs_hwiflow(struct zskbd_softc *);
214: static void zs_maskintr(struct zskbd_softc *);
215:
216: struct zskbd_softc *zskbd_device_lookup(struct cfdriver *, int);
217:
218: /* Low-level routines. */
219: static void zskbd_rxint(struct zs_chanstate *);
220: static void zskbd_stint(struct zs_chanstate *, int);
221: static void zskbd_txint(struct zs_chanstate *);
222: static void zskbd_softint(struct zs_chanstate *);
223: static void zskbd_diag(void *);
224:
225: int zskbd_init(struct zskbd_softc *);
226: void zskbd_putc(struct zskbd_softc *, u_int8_t);
227: void zskbd_raw(struct zskbd_softc *, u_int8_t);
228:
229: /* wskbd glue */
230: void zskbd_cngetc(void *, u_int *, int *);
231: void zskbd_cnpollc(void *, int);
232:
233: void zsstart_tx(struct zskbd_softc *);
234: int zsenqueue_tx(void *, u_int8_t *, u_int);
235:
236: struct wskbd_consops zskbd_consops = {
237: zskbd_cngetc,
238: zskbd_cnpollc
239: };
240:
241: #define ZSKBDUNIT(x) (minor(x) & 0x7ffff)
242:
243: struct zskbd_softc *
244: zskbd_device_lookup(cf, unit)
245: struct cfdriver *cf;
246: int unit;
247: {
248: return (struct zskbd_softc *)device_lookup(cf, unit);
249: }
250:
251: /*
252: * zskbd_match: how is this zs channel configured?
253: */
254: int
255: zskbd_match(parent, vcf, aux)
256: struct device *parent;
257: void *vcf;
258: void *aux;
259: {
260: struct cfdata *cf = vcf;
261: struct zsc_attach_args *args = aux;
262: int ret;
263:
264: /* If we're not looking for a keyboard, just exit */
265: if (strcmp(args->type, "keyboard") != 0)
266: return (0);
267:
268: ret = 10;
269:
270: /* Exact match is better than wildcard. */
271: if (cf->cf_loc[ZSCCF_CHANNEL] == args->channel)
272: ret += 2;
273:
274: /* This driver accepts wildcard. */
275: if (cf->cf_loc[ZSCCF_CHANNEL] == ZSCCF_CHANNEL_DEFAULT)
276: ret += 1;
277:
278: return (ret);
279: }
280:
281: void
282: zskbd_attach(parent, self, aux)
283: struct device *parent, *self;
284: void *aux;
285:
286: {
287: struct zsc_softc *zsc = (void *)parent;
288: struct zskbd_softc *zst = (void *)self;
289: struct sunkbd_softc *ss = (void *)self;
290: struct cfdata *cf = self->dv_cfdata;
291: struct zsc_attach_args *args = aux;
292: struct wskbddev_attach_args a;
293: struct zs_chanstate *cs;
294: int channel, s, tty_unit, console = 0;
295: dev_t dev;
296:
297: ss->sc_sendcmd = zsenqueue_tx;
298: timeout_set(&ss->sc_bellto, sunkbd_bellstop, zst);
299:
300: timeout_set(&zst->zst_diag_ch, zskbd_diag, zst);
301:
302: zst->zst_tbp = zst->zst_tba = zst->zst_tbeg = zst->zst_tbuf;
303: zst->zst_tend = zst->zst_tbeg + ZSKBD_RING_SIZE;
304:
305: tty_unit = ss->sc_dev.dv_unit;
306: channel = args->channel;
307: cs = &zsc->zsc_cs[channel];
308: cs->cs_private = zst;
309: cs->cs_ops = &zsops_kbd;
310:
311: zst->zst_cs = cs;
312: zst->zst_swflags = cf->cf_flags; /* softcar, etc. */
313: zst->zst_hwflags = args->hwflags;
314: dev = makedev(zs_major, tty_unit);
315:
316: if (zst->zst_swflags)
317: printf(", flags 0x%x", zst->zst_swflags);
318:
319: /*
320: * Check whether we serve as a console device.
321: * XXX - split console input/output channels aren't
322: * supported yet on /dev/console
323: */
324: if ((zst->zst_hwflags & ZS_HWFLAG_CONSOLE_INPUT) != 0) {
325: if ((args->hwflags & ZS_HWFLAG_USE_CONSDEV) != 0) {
326: args->consdev->cn_dev = dev;
327: cn_tab->cn_pollc = wskbd_cnpollc;
328: cn_tab->cn_getc = wskbd_cngetc;
329: }
330: cn_tab->cn_dev = dev;
331: console = 1;
332: }
333:
334: zst->zst_rbuf = malloc(zskbd_rbuf_size << 1, M_DEVBUF, M_WAITOK);
335: zst->zst_ebuf = zst->zst_rbuf + (zskbd_rbuf_size << 1);
336: /* Disable the high water mark. */
337: zst->zst_r_hiwat = 0;
338: zst->zst_r_lowat = 0;
339: zst->zst_rbget = zst->zst_rbput = zst->zst_rbuf;
340: zst->zst_rbavail = zskbd_rbuf_size;
341:
342: /* if there are no enable/disable functions, assume the device
343: is always enabled */
344: if (!cs->enable)
345: cs->enabled = 1;
346:
347: /*
348: * Hardware init
349: */
350: if (ISSET(zst->zst_hwflags, ZS_HWFLAG_CONSOLE)) {
351: /* Call zsparam similar to open. */
352:
353: /* Wait a while for previous console output to complete */
354: DELAY(10000);
355: } else if (!ISSET(zst->zst_hwflags, ZS_HWFLAG_NORESET)) {
356: /* Not the console; may need reset. */
357: int reset;
358:
359: reset = (channel == 0) ? ZSWR9_A_RESET : ZSWR9_B_RESET;
360: s = splzs();
361: zs_write_reg(cs, 9, reset);
362: splx(s);
363: }
364:
365: /*
366: * Probe for a keyboard.
367: * If one is found, turn on receiver and status interrupts.
368: * We defer the actual write of the register to zsparam(),
369: * but we must make sure status interrupts are turned on by
370: * the time zsparam() reads the initial rr0 state.
371: */
372: if (zskbd_init(zst)) {
373: SET(cs->cs_preg[1], ZSWR1_RIE | ZSWR1_SIE);
374: zs_write_reg(cs, 1, cs->cs_creg[1]);
375:
376: /* Make sure DTR is on now. */
377: s = splzs();
378: zs_modem(zst, 1);
379: splx(s);
380: } else {
381: /* Will raise DTR in open. */
382: s = splzs();
383: zs_modem(zst, 0);
384: splx(s);
385:
386: return;
387: }
388:
389: ss->sc_click = 0;
390: #if defined(SUN4C) || defined(SUN4M)
391: if (!CPU_ISSUN4) {
392: char *cp = getpropstring(optionsnode, "keyboard-click?");
393:
394: if (cp != NULL && strcmp(cp, "true") == 0)
395: ss->sc_click = 1;
396: }
397: #endif
398: sunkbd_setclick(ss, ss->sc_click);
399:
400: a.console = console;
401: if (ISTYPE5(ss->sc_layout)) {
402: printf(": keyboard, type 5, layout 0x%x", ss->sc_layout);
403: a.keymap = &sunkbd5_keymapdata;
404: #ifndef SUNKBD5_LAYOUT
405: if (ss->sc_layout < MAXSUNLAYOUT &&
406: sunkbd_layouts[ss->sc_layout] != -1)
407: sunkbd5_keymapdata.layout =
408: sunkbd_layouts[ss->sc_layout];
409: #endif
410: } else {
411: printf(": keyboard, type %d", ss->sc_id);
412: if (ss->sc_id >= KB_SUN4)
413: printf(", layout 0x%x", ss->sc_layout);
414: a.keymap = &sunkbd_keymapdata;
415: #ifndef SUNKBD_LAYOUT
416: if (ss->sc_layout < MAXSUNLAYOUT &&
417: sunkbd_layouts[ss->sc_layout] != -1)
418: sunkbd_keymapdata.layout =
419: sunkbd_layouts[ss->sc_layout];
420: #endif
421: }
422: a.accessops = &sunkbd_accessops;
423: a.accesscookie = zst;
424:
425: printf("\n");
426:
427: if (console)
428: wskbd_cnattach(&zskbd_consops, zst, a.keymap);
429:
430: ss->sc_wskbddev = config_found(self, &a, wskbddevprint);
431: }
432:
433: int
434: zskbd_init(zst)
435: struct zskbd_softc *zst;
436: {
437: struct sunkbd_softc *ss = (void *)zst;
438: struct zs_chanstate *cs = zst->zst_cs;
439: int s, tries;
440: u_int8_t v3, v4, v5, rr0;
441:
442: /* setup for 1200n81 */
443: if (zs_set_speed(cs, 1200)) { /* set 1200bps */
444: printf(": failed to set baudrate\n");
445: return 0;
446: }
447: if (zs_set_modes(cs, CS8 | CLOCAL)) {
448: printf(": failed to set modes\n");
449: return 0;
450: }
451:
452: s = splzs();
453:
454: zs_maskintr(zst);
455:
456: v3 = cs->cs_preg[3]; /* set 8 bit chars */
457: v5 = cs->cs_preg[5];
458: CLR(v3, ZSWR3_RXSIZE);
459: CLR(v5, ZSWR5_TXSIZE);
460: SET(v3, ZSWR3_RX_8);
461: SET(v5, ZSWR5_TX_8);
462: cs->cs_preg[3] = v3;
463: cs->cs_preg[5] = v5;
464:
465: v4 = cs->cs_preg[4]; /* no parity 1 stop */
466: CLR(v4, ZSWR4_SBMASK | ZSWR4_PARMASK);
467: SET(v4, ZSWR4_ONESB | ZSWR4_EVENP);
468: cs->cs_preg[4] = v4;
469:
470: if (!cs->cs_heldchange) {
471: if (zst->zst_tx_busy) {
472: zst->zst_heldtbc = zst->zst_tbc;
473: zst->zst_tbc = 0;
474: cs->cs_heldchange = 1;
475: } else
476: zs_loadchannelregs(cs);
477: }
478:
479: /*
480: * Hardware flow control is disabled, turn off the buffer water
481: * marks and unblock any soft flow control state. Otherwise, enable
482: * the water marks.
483: */
484: zst->zst_r_hiwat = 0;
485: zst->zst_r_lowat = 0;
486: if (ISSET(zst->zst_rx_flags, RX_TTY_OVERFLOWED)) {
487: CLR(zst->zst_rx_flags, RX_TTY_OVERFLOWED);
488: zst->zst_rx_ready = 1;
489: cs->cs_softreq = 1;
490: }
491: if (ISSET(zst->zst_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) {
492: CLR(zst->zst_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED);
493: zs_hwiflow(zst);
494: }
495:
496: /*
497: * Force a recheck of the hardware carrier and flow control status,
498: * since we may have changed which bits we're looking at.
499: */
500: zskbd_stint(cs, 1);
501:
502: splx(s);
503:
504: /*
505: * Hardware flow control is disabled, unblock any hard flow control
506: * state.
507: */
508: if (zst->zst_tx_stopped) {
509: zst->zst_tx_stopped = 0;
510: zsstart_tx(zst);
511: }
512:
513: zskbd_softint(cs);
514:
515: /* Ok, start the reset sequence... */
516:
517: s = splhigh();
518:
519: for (tries = 5; tries != 0; tries--) {
520: int ltries;
521:
522: ss->sc_leds = 0;
523: ss->sc_layout = -1;
524:
525: /* Send reset request */
526: zskbd_putc(zst, SKBD_CMD_RESET);
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_kbdstate == SKBD_STATE_RESET)
534: break;
535: }
536: DELAY(1000);
537: }
538: if (ltries == 0)
539: continue;
540:
541: /* Wait for reset to finish. */
542: ltries = 1000;
543: while (--ltries > 0) {
544: rr0 = *cs->cs_reg_csr;
545: if (rr0 & ZSRR0_RX_READY) {
546: sunkbd_raw(ss, *cs->cs_reg_data);
547: if (ss->sc_kbdstate == SKBD_STATE_GETKEY)
548: break;
549: }
550: DELAY(1000);
551: }
552: if (ltries == 0)
553: continue;
554:
555:
556: /* Send layout request */
557: if (ss->sc_id == KB_SUN4) {
558: zskbd_putc(zst, SKBD_CMD_LAYOUT);
559:
560: ltries = 1000;
561: while (--ltries > 0) {
562: rr0 = *cs->cs_reg_csr;
563: if (rr0 & ZSRR0_RX_READY) {
564: sunkbd_raw(ss, *cs->cs_reg_data);
565: if (ss->sc_layout != -1)
566: break;
567: }
568: DELAY(1000);
569: }
570: if (ltries == 0)
571: continue;
572: break;
573: } else {
574: ss->sc_layout = 0;
575: break;
576: }
577: }
578: if (tries == 0)
579: printf(": no keyboard\n");
580: splx(s);
581:
582: return tries;
583: }
584:
585: void
586: zskbd_putc(zst, c)
587: struct zskbd_softc *zst;
588: u_int8_t c;
589: {
590: u_int8_t rr0;
591: int s;
592:
593: s = splhigh();
594: do {
595: rr0 = *zst->zst_cs->cs_reg_csr;
596: } while ((rr0 & ZSRR0_TX_READY) == 0);
597: *zst->zst_cs->cs_reg_data = c;
598: delay(2);
599: splx(s);
600: }
601:
602: int
603: zsenqueue_tx(v, str, len)
604: void *v;
605: u_int8_t *str;
606: u_int len;
607: {
608: struct zskbd_softc *zst = v;
609: int s;
610: u_int i;
611:
612: s = splzs();
613: if (zst->zst_tbc + len > ZSKBD_RING_SIZE)
614: return (-1);
615: zst->zst_tbc += len;
616: for (i = 0; i < len; i++) {
617: *zst->zst_tbp = str[i];
618: if (++zst->zst_tbp == zst->zst_tend)
619: zst->zst_tbp = zst->zst_tbeg;
620: }
621: splx(s);
622: zsstart_tx(zst);
623: return (0);
624: }
625:
626: void
627: zsstart_tx(zst)
628: struct zskbd_softc *zst;
629: {
630: struct zs_chanstate *cs = zst->zst_cs;
631: int s, s1;
632:
633: s = spltty();
634:
635: if (zst->zst_tx_stopped)
636: goto out;
637: if (zst->zst_tbc == 0)
638: goto out;
639:
640: s1 = splzs();
641:
642: zst->zst_tx_busy = 1;
643:
644: if (!ISSET(cs->cs_preg[1], ZSWR1_TIE)) {
645: SET(cs->cs_preg[1], ZSWR1_TIE);
646: cs->cs_creg[1] = cs->cs_preg[1];
647: zs_write_reg(cs, 1, cs->cs_creg[1]);
648: }
649:
650: zs_write_data(cs, *zst->zst_tba);
651:
652: zst->zst_tbc--;
653: if (++zst->zst_tba == zst->zst_tend)
654: zst->zst_tba = zst->zst_tbeg;
655:
656: splx(s1);
657:
658: out:
659: splx(s);
660: }
661:
662: /*
663: * Compute interrupt enable bits and set in the pending bits. Called both
664: * in zsparam() and when PPS (pulse per second timing) state changes.
665: * Must be called at splzs().
666: */
667: static void
668: zs_maskintr(zst)
669: struct zskbd_softc *zst;
670: {
671: struct zs_chanstate *cs = zst->zst_cs;
672: int tmp15;
673:
674: cs->cs_rr0_mask = cs->cs_rr0_cts | cs->cs_rr0_dcd;
675: if (zst->zst_ppsmask != 0)
676: cs->cs_rr0_mask |= cs->cs_rr0_pps;
677: tmp15 = cs->cs_preg[15];
678: if (ISSET(cs->cs_rr0_mask, ZSRR0_DCD))
679: SET(tmp15, ZSWR15_DCD_IE);
680: else
681: CLR(tmp15, ZSWR15_DCD_IE);
682: if (ISSET(cs->cs_rr0_mask, ZSRR0_CTS))
683: SET(tmp15, ZSWR15_CTS_IE);
684: else
685: CLR(tmp15, ZSWR15_CTS_IE);
686: cs->cs_preg[15] = tmp15;
687: }
688:
689:
690: /*
691: * Raise or lower modem control (DTR/RTS) signals. If a character is
692: * in transmission, the change is deferred.
693: */
694: static void
695: zs_modem(zst, onoff)
696: struct zskbd_softc *zst;
697: int onoff;
698: {
699: struct zs_chanstate *cs = zst->zst_cs;
700:
701: if (cs->cs_wr5_dtr == 0)
702: return;
703:
704: if (onoff)
705: SET(cs->cs_preg[5], cs->cs_wr5_dtr);
706: else
707: CLR(cs->cs_preg[5], cs->cs_wr5_dtr);
708:
709: if (!cs->cs_heldchange) {
710: if (zst->zst_tx_busy) {
711: zst->zst_heldtbc = zst->zst_tbc;
712: zst->zst_tbc = 0;
713: cs->cs_heldchange = 1;
714: } else
715: zs_loadchannelregs(cs);
716: }
717: }
718:
719: /*
720: * Internal version of zshwiflow
721: * called at splzs
722: */
723: static void
724: zs_hwiflow(zst)
725: struct zskbd_softc *zst;
726: {
727: struct zs_chanstate *cs = zst->zst_cs;
728:
729: if (cs->cs_wr5_rts == 0)
730: return;
731:
732: if (ISSET(zst->zst_rx_flags, RX_ANY_BLOCK)) {
733: CLR(cs->cs_preg[5], cs->cs_wr5_rts);
734: CLR(cs->cs_creg[5], cs->cs_wr5_rts);
735: } else {
736: SET(cs->cs_preg[5], cs->cs_wr5_rts);
737: SET(cs->cs_creg[5], cs->cs_wr5_rts);
738: }
739: zs_write_reg(cs, 5, cs->cs_creg[5]);
740: }
741:
742:
743: /****************************************************************
744: * Interface to the lower layer (zscc)
745: ****************************************************************/
746:
747: #define integrate
748: integrate void zskbd_rxsoft(struct zskbd_softc *);
749: integrate void zskbd_txsoft(struct zskbd_softc *);
750: integrate void zskbd_stsoft(struct zskbd_softc *);
751: /*
752: * receiver ready interrupt.
753: * called at splzs
754: */
755: static void
756: zskbd_rxint(cs)
757: struct zs_chanstate *cs;
758: {
759: struct zskbd_softc *zst = cs->cs_private;
760: u_char *put, *end;
761: u_int cc;
762: u_char rr0, rr1, c;
763:
764: end = zst->zst_ebuf;
765: put = zst->zst_rbput;
766: cc = zst->zst_rbavail;
767:
768: while (cc > 0) {
769: /*
770: * First read the status, because reading the received char
771: * destroys the status of this char.
772: */
773: rr1 = zs_read_reg(cs, 1);
774: c = zs_read_data(cs);
775:
776: if (ISSET(rr1, ZSRR1_FE | ZSRR1_DO | ZSRR1_PE)) {
777: /* Clear the receive error. */
778: zs_write_csr(cs, ZSWR0_RESET_ERRORS);
779: }
780:
781: put[0] = c;
782: put[1] = rr1;
783: put += 2;
784: if (put >= end)
785: put = zst->zst_rbuf;
786: cc--;
787:
788: rr0 = zs_read_csr(cs);
789: if (!ISSET(rr0, ZSRR0_RX_READY))
790: break;
791: }
792:
793: /*
794: * Current string of incoming characters ended because
795: * no more data was available or we ran out of space.
796: * Schedule a receive event if any data was received.
797: * If we're out of space, turn off receive interrupts.
798: */
799: zst->zst_rbput = put;
800: zst->zst_rbavail = cc;
801: if (!ISSET(zst->zst_rx_flags, RX_TTY_OVERFLOWED)) {
802: zst->zst_rx_ready = 1;
803: cs->cs_softreq = 1;
804: }
805:
806: /*
807: * See if we are in danger of overflowing a buffer. If
808: * so, use hardware flow control to ease the pressure.
809: */
810: if (!ISSET(zst->zst_rx_flags, RX_IBUF_BLOCKED) &&
811: cc < zst->zst_r_hiwat) {
812: SET(zst->zst_rx_flags, RX_IBUF_BLOCKED);
813: zs_hwiflow(zst);
814: }
815:
816: /*
817: * If we're out of space, disable receive interrupts
818: * until the queue has drained a bit.
819: */
820: if (!cc) {
821: SET(zst->zst_rx_flags, RX_IBUF_OVERFLOWED);
822: CLR(cs->cs_preg[1], ZSWR1_RIE);
823: cs->cs_creg[1] = cs->cs_preg[1];
824: zs_write_reg(cs, 1, cs->cs_creg[1]);
825: }
826: }
827:
828: /*
829: * transmitter ready interrupt. (splzs)
830: */
831: static void
832: zskbd_txint(cs)
833: struct zs_chanstate *cs;
834: {
835: struct zskbd_softc *zst = cs->cs_private;
836:
837: /*
838: * If we've delayed a parameter change, do it now, and restart
839: * output.
840: */
841: if (cs->cs_heldchange) {
842: zs_loadchannelregs(cs);
843: cs->cs_heldchange = 0;
844: zst->zst_tbc = zst->zst_heldtbc;
845: zst->zst_heldtbc = 0;
846: }
847:
848: /* Output the next character in the buffer, if any. */
849: if (zst->zst_tbc > 0) {
850: zs_write_data(cs, *zst->zst_tba);
851: zst->zst_tbc--;
852: if (++zst->zst_tba == zst->zst_tend)
853: zst->zst_tba = zst->zst_tbeg;
854: } else {
855: /* Disable transmit completion interrupts if necessary. */
856: if (ISSET(cs->cs_preg[1], ZSWR1_TIE)) {
857: CLR(cs->cs_preg[1], ZSWR1_TIE);
858: cs->cs_creg[1] = cs->cs_preg[1];
859: zs_write_reg(cs, 1, cs->cs_creg[1]);
860: }
861: if (zst->zst_tx_busy) {
862: zst->zst_tx_busy = 0;
863: zst->zst_tx_done = 1;
864: cs->cs_softreq = 1;
865: }
866: }
867: }
868:
869: /*
870: * status change interrupt. (splzs)
871: */
872: static void
873: zskbd_stint(cs, force)
874: struct zs_chanstate *cs;
875: int force;
876: {
877: struct zskbd_softc *zst = cs->cs_private;
878: u_char rr0, delta;
879:
880: rr0 = zs_read_csr(cs);
881: zs_write_csr(cs, ZSWR0_RESET_STATUS);
882:
883: /*
884: * Check here for console break, so that we can abort
885: * even when interrupts are locking up the machine.
886: */
887: if (!force)
888: delta = rr0 ^ cs->cs_rr0;
889: else
890: delta = cs->cs_rr0_mask;
891: cs->cs_rr0 = rr0;
892:
893: if (ISSET(delta, cs->cs_rr0_mask)) {
894: SET(cs->cs_rr0_delta, delta);
895:
896: /*
897: * Stop output immediately if we lose the output
898: * flow control signal or carrier detect.
899: */
900: if (ISSET(~rr0, cs->cs_rr0_mask)) {
901: zst->zst_tbc = 0;
902: zst->zst_heldtbc = 0;
903: }
904:
905: zst->zst_st_check = 1;
906: cs->cs_softreq = 1;
907: }
908: }
909:
910: void
911: zskbd_diag(arg)
912: void *arg;
913: {
914: struct zskbd_softc *zst = arg;
915: struct sunkbd_softc *ss = arg;
916: int overflows, floods;
917: int s;
918:
919: s = splzs();
920: overflows = zst->zst_overflows;
921: zst->zst_overflows = 0;
922: floods = zst->zst_floods;
923: zst->zst_floods = 0;
924: zst->zst_errors = 0;
925: splx(s);
926:
927: log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n",
928: ss->sc_dev.dv_xname,
929: overflows, overflows == 1 ? "" : "s",
930: floods, floods == 1 ? "" : "s");
931: }
932:
933: integrate void
934: zskbd_rxsoft(zst)
935: struct zskbd_softc *zst;
936: {
937: struct sunkbd_softc *ss = (void *)zst;
938: struct zs_chanstate *cs = zst->zst_cs;
939: u_char *get, *end;
940: u_int cc, scc, type;
941: u_char rr1;
942: int code, value;
943: int s;
944:
945: end = zst->zst_ebuf;
946: get = zst->zst_rbget;
947: scc = cc = zskbd_rbuf_size - zst->zst_rbavail;
948:
949: if (cc == zskbd_rbuf_size) {
950: zst->zst_floods++;
951: if (zst->zst_errors++ == 0)
952: timeout_add(&zst->zst_diag_ch, 60 * hz);
953: }
954:
955: while (cc) {
956: code = get[0];
957: rr1 = get[1];
958: if (ISSET(rr1, ZSRR1_DO | ZSRR1_FE | ZSRR1_PE)) {
959: if (ISSET(rr1, ZSRR1_DO)) {
960: zst->zst_overflows++;
961: if (zst->zst_errors++ == 0)
962: timeout_add(&zst->zst_diag_ch, 60 * hz);
963: }
964: if (ISSET(rr1, ZSRR1_FE))
965: SET(code, TTY_FE);
966: if (ISSET(rr1, ZSRR1_PE))
967: SET(code, TTY_PE);
968: }
969:
970: sunkbd_decode(code, &type, &value);
971: wskbd_input(ss->sc_wskbddev, type, value);
972:
973: get += 2;
974: if (get >= end)
975: get = zst->zst_rbuf;
976: cc--;
977: }
978:
979: if (cc != scc) {
980: zst->zst_rbget = get;
981: s = splzs();
982: cc = zst->zst_rbavail += scc - cc;
983: /* Buffers should be ok again, release possible block. */
984: if (cc >= zst->zst_r_lowat) {
985: if (ISSET(zst->zst_rx_flags, RX_IBUF_OVERFLOWED)) {
986: CLR(zst->zst_rx_flags, RX_IBUF_OVERFLOWED);
987: SET(cs->cs_preg[1], ZSWR1_RIE);
988: cs->cs_creg[1] = cs->cs_preg[1];
989: zs_write_reg(cs, 1, cs->cs_creg[1]);
990: }
991: if (ISSET(zst->zst_rx_flags, RX_IBUF_BLOCKED)) {
992: CLR(zst->zst_rx_flags, RX_IBUF_BLOCKED);
993: zs_hwiflow(zst);
994: }
995: }
996: splx(s);
997: }
998: }
999:
1000: integrate void
1001: zskbd_txsoft(zst)
1002: struct zskbd_softc *zst;
1003: {
1004: }
1005:
1006: integrate void
1007: zskbd_stsoft(zst)
1008: struct zskbd_softc *zst;
1009: {
1010: struct zs_chanstate *cs = zst->zst_cs;
1011: u_char rr0, delta;
1012: int s;
1013:
1014: s = splzs();
1015: rr0 = cs->cs_rr0;
1016: delta = cs->cs_rr0_delta;
1017: cs->cs_rr0_delta = 0;
1018: splx(s);
1019:
1020: if (ISSET(delta, cs->cs_rr0_cts)) {
1021: /* Block or unblock output according to flow control. */
1022: if (ISSET(rr0, cs->cs_rr0_cts))
1023: zst->zst_tx_stopped = 0;
1024: else
1025: zst->zst_tx_stopped = 1;
1026: }
1027: }
1028:
1029: /*
1030: * Software interrupt. Called at zssoft
1031: *
1032: * The main job to be done here is to empty the input ring
1033: * by passing its contents up to the tty layer. The ring is
1034: * always emptied during this operation, therefore the ring
1035: * must not be larger than the space after "high water" in
1036: * the tty layer, or the tty layer might drop our input.
1037: *
1038: * Note: an "input blockage" condition is assumed to exist if
1039: * EITHER the TS_TBLOCK flag or zst_rx_blocked flag is set.
1040: */
1041: static void
1042: zskbd_softint(cs)
1043: struct zs_chanstate *cs;
1044: {
1045: struct zskbd_softc *zst = cs->cs_private;
1046: int s;
1047:
1048: s = spltty();
1049:
1050: if (zst->zst_rx_ready) {
1051: zst->zst_rx_ready = 0;
1052: zskbd_rxsoft(zst);
1053: }
1054:
1055: if (zst->zst_st_check) {
1056: zst->zst_st_check = 0;
1057: zskbd_stsoft(zst);
1058: }
1059:
1060: if (zst->zst_tx_done) {
1061: zst->zst_tx_done = 0;
1062: zskbd_txsoft(zst);
1063: }
1064:
1065: splx(s);
1066: }
1067:
1068: struct zsops zsops_kbd = {
1069: zskbd_rxint, /* receive char available */
1070: zskbd_stint, /* external/status */
1071: zskbd_txint, /* xmit buffer empty */
1072: zskbd_softint, /* process software interrupt */
1073: };
1074:
1075: void
1076: zskbd_cnpollc(v, on)
1077: void *v;
1078: int on;
1079: {
1080: extern int swallow_zsintrs;
1081:
1082: if (on)
1083: swallow_zsintrs++;
1084: else
1085: swallow_zsintrs--;
1086: }
1087:
1088: void
1089: zskbd_cngetc(v, type, data)
1090: void *v;
1091: u_int *type;
1092: int *data;
1093: {
1094: struct zskbd_softc *zst = v;
1095: int s;
1096: u_int8_t c, rr0;
1097:
1098: s = splhigh();
1099: do {
1100: rr0 = *zst->zst_cs->cs_reg_csr;
1101: } while ((rr0 & ZSRR0_RX_READY) == 0);
1102:
1103: c = *zst->zst_cs->cs_reg_data;
1104: splx(s);
1105:
1106: switch (c) {
1107: case SKBD_RSP_IDLE:
1108: *type = WSCONS_EVENT_ALL_KEYS_UP;
1109: *data = 0;
1110: break;
1111: default:
1112: *type = (c & 0x80) ?
1113: WSCONS_EVENT_KEY_UP : WSCONS_EVENT_KEY_DOWN;
1114: *data = c & 0x7f;
1115: break;
1116: }
1117: }
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