epcom.c revision 1.14 1 1.14 christos /* $NetBSD: epcom.c,v 1.14 2007/03/04 05:59:37 christos Exp $ */
2 1.1 joff /*
3 1.1 joff * Copyright (c) 1998, 1999, 2001, 2002, 2004 The NetBSD Foundation, Inc.
4 1.1 joff * All rights reserved.
5 1.1 joff *
6 1.1 joff * This code is derived from software contributed to The NetBSD Foundation
7 1.1 joff * by Jesse Off
8 1.1 joff *
9 1.1 joff * This code is derived from software contributed to The NetBSD Foundation
10 1.1 joff * by Ichiro FUKUHARA and Naoto Shimazaki.
11 1.1 joff *
12 1.1 joff * This code is derived from software contributed to The NetBSD Foundation
13 1.1 joff * by IWAMOTO Toshihiro.
14 1.1 joff *
15 1.1 joff * This code is derived from software contributed to The NetBSD Foundation
16 1.1 joff * by Charles M. Hannum.
17 1.1 joff *
18 1.1 joff * Redistribution and use in source and binary forms, with or without
19 1.1 joff * modification, are permitted provided that the following conditions
20 1.1 joff * are met:
21 1.1 joff * 1. Redistributions of source code must retain the above copyright
22 1.1 joff * notice, this list of conditions and the following disclaimer.
23 1.1 joff * 2. Redistributions in binary form must reproduce the above copyright
24 1.1 joff * notice, this list of conditions and the following disclaimer in the
25 1.1 joff * documentation and/or other materials provided with the distribution.
26 1.1 joff * 3. All advertising materials mentioning features or use of this software
27 1.1 joff * must display the following acknowledgement:
28 1.1 joff * This product includes software developed by the NetBSD
29 1.1 joff * Foundation, Inc. and its contributors.
30 1.1 joff * 4. Neither the name of The NetBSD Foundation nor the names of its
31 1.1 joff * contributors may be used to endorse or promote products derived
32 1.1 joff * from this software without specific prior written permission.
33 1.1 joff *
34 1.1 joff * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
35 1.1 joff * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
36 1.1 joff * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
37 1.1 joff * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
38 1.1 joff * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
39 1.1 joff * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
40 1.1 joff * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
41 1.1 joff * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
42 1.1 joff * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
43 1.1 joff * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
44 1.1 joff * POSSIBILITY OF SUCH DAMAGE.
45 1.1 joff */
46 1.1 joff
47 1.1 joff /*
48 1.1 joff * Copyright (c) 1991 The Regents of the University of California.
49 1.1 joff * All rights reserved.
50 1.1 joff *
51 1.1 joff * Redistribution and use in source and binary forms, with or without
52 1.1 joff * modification, are permitted provided that the following conditions
53 1.1 joff * are met:
54 1.1 joff * 1. Redistributions of source code must retain the above copyright
55 1.1 joff * notice, this list of conditions and the following disclaimer.
56 1.1 joff * 2. Redistributions in binary form must reproduce the above copyright
57 1.1 joff * notice, this list of conditions and the following disclaimer in the
58 1.1 joff * documentation and/or other materials provided with the distribution.
59 1.1 joff * 3. Neither the name of the University nor the names of its contributors
60 1.1 joff * may be used to endorse or promote products derived from this software
61 1.1 joff * without specific prior written permission.
62 1.1 joff *
63 1.1 joff * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
64 1.1 joff * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
65 1.1 joff * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
66 1.1 joff * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
67 1.1 joff * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
68 1.1 joff * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
69 1.1 joff * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
70 1.1 joff * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
71 1.1 joff * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
72 1.1 joff * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
73 1.1 joff * SUCH DAMAGE.
74 1.1 joff *
75 1.1 joff * @(#)com.c 7.5 (Berkeley) 5/16/91
76 1.1 joff */
77 1.1 joff
78 1.1 joff /*
79 1.1 joff * TODO: hardware flow control
80 1.1 joff */
81 1.1 joff
82 1.1 joff #include <sys/cdefs.h>
83 1.14 christos __KERNEL_RCSID(0, "$NetBSD: epcom.c,v 1.14 2007/03/04 05:59:37 christos Exp $");
84 1.1 joff
85 1.1 joff #include "opt_ddb.h"
86 1.1 joff #include "opt_kgdb.h"
87 1.1 joff #include "epcom.h"
88 1.1 joff
89 1.1 joff #include "rnd.h"
90 1.1 joff #if NRND > 0 && defined(RND_COM)
91 1.1 joff #include <sys/rnd.h>
92 1.1 joff #endif
93 1.1 joff
94 1.1 joff /*
95 1.1 joff * Override cnmagic(9) macro before including <sys/systm.h>.
96 1.1 joff * We need to know if cn_check_magic triggered debugger, so set a flag.
97 1.1 joff * Callers of cn_check_magic must declare int cn_trapped = 0;
98 1.1 joff * XXX: this is *ugly*!
99 1.1 joff */
100 1.1 joff #define cn_trap() \
101 1.1 joff do { \
102 1.1 joff console_debugger(); \
103 1.1 joff cn_trapped = 1; \
104 1.1 joff } while (/* CONSTCOND */ 0)
105 1.1 joff
106 1.1 joff
107 1.1 joff #include <sys/param.h>
108 1.1 joff #include <sys/systm.h>
109 1.1 joff #include <sys/types.h>
110 1.1 joff #include <sys/conf.h>
111 1.1 joff #include <sys/file.h>
112 1.1 joff #include <sys/device.h>
113 1.1 joff #include <sys/kernel.h>
114 1.1 joff #include <sys/malloc.h>
115 1.1 joff #include <sys/tty.h>
116 1.1 joff #include <sys/uio.h>
117 1.1 joff #include <sys/vnode.h>
118 1.10 elad #include <sys/kauth.h>
119 1.1 joff
120 1.1 joff #include <machine/intr.h>
121 1.1 joff #include <machine/bus.h>
122 1.1 joff
123 1.1 joff #include <arm/ep93xx/epcomreg.h>
124 1.1 joff #include <arm/ep93xx/epcomvar.h>
125 1.1 joff #include <arm/ep93xx/ep93xxreg.h>
126 1.1 joff #include <arm/ep93xx/ep93xxvar.h>
127 1.1 joff
128 1.1 joff #include <dev/cons.h>
129 1.1 joff
130 1.1 joff static int epcomparam(struct tty *, struct termios *);
131 1.1 joff static void epcomstart(struct tty *);
132 1.1 joff static int epcomhwiflow(struct tty *, int);
133 1.1 joff
134 1.1 joff static u_int cflag2lcrhi(tcflag_t);
135 1.1 joff static void epcom_iflush(struct epcom_softc *);
136 1.1 joff static void epcom_set(struct epcom_softc *);
137 1.1 joff
138 1.1 joff int epcomcngetc(dev_t);
139 1.1 joff void epcomcnputc(dev_t, int);
140 1.1 joff void epcomcnpollc(dev_t, int);
141 1.1 joff
142 1.1 joff static void epcomsoft(void* arg);
143 1.1 joff inline static void epcom_txsoft(struct epcom_softc *, struct tty *);
144 1.1 joff inline static void epcom_rxsoft(struct epcom_softc *, struct tty *);
145 1.1 joff
146 1.1 joff void epcomcnprobe(struct consdev *);
147 1.1 joff void epcomcninit(struct consdev *);
148 1.1 joff
149 1.1 joff static struct epcom_cons_softc {
150 1.1 joff bus_space_tag_t sc_iot;
151 1.1 joff bus_space_handle_t sc_ioh;
152 1.1 joff bus_addr_t sc_hwbase;
153 1.1 joff int sc_ospeed;
154 1.1 joff tcflag_t sc_cflag;
155 1.1 joff int sc_attached;
156 1.1 joff } epcomcn_sc;
157 1.1 joff
158 1.1 joff static struct cnm_state epcom_cnm_state;
159 1.1 joff
160 1.1 joff extern struct cfdriver epcom_cd;
161 1.1 joff
162 1.1 joff dev_type_open(epcomopen);
163 1.1 joff dev_type_close(epcomclose);
164 1.1 joff dev_type_read(epcomread);
165 1.1 joff dev_type_write(epcomwrite);
166 1.1 joff dev_type_ioctl(epcomioctl);
167 1.1 joff dev_type_stop(epcomstop);
168 1.1 joff dev_type_tty(epcomtty);
169 1.1 joff dev_type_poll(epcompoll);
170 1.1 joff
171 1.1 joff const struct cdevsw epcom_cdevsw = {
172 1.1 joff epcomopen, epcomclose, epcomread, epcomwrite, epcomioctl,
173 1.1 joff epcomstop, epcomtty, epcompoll, nommap, ttykqfilter, D_TTY
174 1.1 joff };
175 1.1 joff
176 1.1 joff struct consdev epcomcons = {
177 1.1 joff NULL, NULL, epcomcngetc, epcomcnputc, epcomcnpollc, NULL,
178 1.1 joff NULL, NULL, NODEV, CN_NORMAL
179 1.1 joff };
180 1.1 joff
181 1.1 joff #ifndef DEFAULT_COMSPEED
182 1.1 joff #define DEFAULT_COMSPEED 115200
183 1.1 joff #endif
184 1.1 joff
185 1.1 joff #define COMUNIT_MASK 0x7ffff
186 1.1 joff #define COMDIALOUT_MASK 0x80000
187 1.1 joff
188 1.1 joff #define COMUNIT(x) (minor(x) & COMUNIT_MASK)
189 1.1 joff #define COMDIALOUT(x) (minor(x) & COMDIALOUT_MASK)
190 1.1 joff
191 1.1 joff #define COM_ISALIVE(sc) ((sc)->enabled != 0 && \
192 1.7 thorpej device_is_active(&(sc)->sc_dev))
193 1.1 joff
194 1.1 joff void
195 1.6 christos epcom_attach_subr(struct epcom_softc *sc)
196 1.1 joff {
197 1.1 joff struct tty *tp;
198 1.1 joff
199 1.1 joff if (sc->sc_iot == epcomcn_sc.sc_iot
200 1.1 joff && sc->sc_hwbase == epcomcn_sc.sc_hwbase) {
201 1.1 joff epcomcn_sc.sc_attached = 1;
202 1.1 joff sc->sc_lcrlo = EPCOMSPEED2BRD(epcomcn_sc.sc_ospeed) & 0xff;
203 1.1 joff sc->sc_lcrmid = EPCOMSPEED2BRD(epcomcn_sc.sc_ospeed) >> 8;
204 1.1 joff
205 1.1 joff /* Make sure the console is always "hardwired". */
206 1.1 joff delay(10000); /* wait for output to finish */
207 1.1 joff SET(sc->sc_hwflags, COM_HW_CONSOLE);
208 1.1 joff SET(sc->sc_swflags, TIOCFLAG_SOFTCAR);
209 1.1 joff }
210 1.1 joff
211 1.1 joff tp = ttymalloc();
212 1.1 joff tp->t_oproc = epcomstart;
213 1.1 joff tp->t_param = epcomparam;
214 1.1 joff tp->t_hwiflow = epcomhwiflow;
215 1.1 joff
216 1.1 joff sc->sc_tty = tp;
217 1.1 joff sc->sc_rbuf = malloc(EPCOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT);
218 1.1 joff sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf;
219 1.1 joff sc->sc_rbavail = EPCOM_RING_SIZE;
220 1.1 joff if (sc->sc_rbuf == NULL) {
221 1.1 joff printf("%s: unable to allocate ring buffer\n",
222 1.1 joff sc->sc_dev.dv_xname);
223 1.1 joff return;
224 1.1 joff }
225 1.1 joff sc->sc_ebuf = sc->sc_rbuf + (EPCOM_RING_SIZE << 1);
226 1.1 joff sc->sc_tbc = 0;
227 1.1 joff
228 1.1 joff sc->sc_lcrlo = EPCOMSPEED2BRD(DEFAULT_COMSPEED) & 0xff;
229 1.1 joff sc->sc_lcrmid = EPCOMSPEED2BRD(DEFAULT_COMSPEED) >> 8;
230 1.1 joff sc->sc_lcrhi = cflag2lcrhi(CS8); /* 8N1 */
231 1.1 joff
232 1.1 joff tty_attach(tp);
233 1.1 joff
234 1.1 joff if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) {
235 1.1 joff int maj;
236 1.1 joff
237 1.1 joff /* locate the major number */
238 1.1 joff maj = cdevsw_lookup_major(&epcom_cdevsw);
239 1.1 joff
240 1.9 thorpej cn_tab->cn_dev = makedev(maj, device_unit(&sc->sc_dev));
241 1.1 joff
242 1.1 joff aprint_normal("%s: console\n", sc->sc_dev.dv_xname);
243 1.1 joff }
244 1.1 joff
245 1.1 joff sc->sc_si = softintr_establish(IPL_SOFTSERIAL, epcomsoft, sc);
246 1.1 joff
247 1.1 joff #if NRND > 0 && defined(RND_COM)
248 1.1 joff rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname,
249 1.1 joff RND_TYPE_TTY, 0);
250 1.1 joff #endif
251 1.1 joff
252 1.1 joff /* if there are no enable/disable functions, assume the device
253 1.1 joff is always enabled */
254 1.1 joff if (!sc->enable)
255 1.1 joff sc->enabled = 1;
256 1.1 joff
257 1.1 joff /* XXX configure register */
258 1.1 joff /* xxx_config(sc) */
259 1.1 joff
260 1.1 joff SET(sc->sc_hwflags, COM_HW_DEV_OK);
261 1.1 joff }
262 1.1 joff
263 1.1 joff static int
264 1.6 christos epcomparam(struct tty *tp, struct termios *t)
265 1.1 joff {
266 1.1 joff struct epcom_softc *sc
267 1.1 joff = device_lookup(&epcom_cd, COMUNIT(tp->t_dev));
268 1.1 joff int s;
269 1.1 joff
270 1.1 joff if (COM_ISALIVE(sc) == 0)
271 1.1 joff return (EIO);
272 1.1 joff
273 1.1 joff if (t->c_ispeed && t->c_ispeed != t->c_ospeed)
274 1.1 joff return (EINVAL);
275 1.1 joff
276 1.1 joff /*
277 1.1 joff * For the console, always force CLOCAL and !HUPCL, so that the port
278 1.1 joff * is always active.
279 1.1 joff */
280 1.1 joff if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) ||
281 1.1 joff ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) {
282 1.1 joff SET(t->c_cflag, CLOCAL);
283 1.1 joff CLR(t->c_cflag, HUPCL);
284 1.1 joff }
285 1.1 joff
286 1.1 joff /*
287 1.1 joff * If there were no changes, don't do anything. This avoids dropping
288 1.1 joff * input and improves performance when all we did was frob things like
289 1.1 joff * VMIN and VTIME.
290 1.1 joff */
291 1.1 joff if (tp->t_ospeed == t->c_ospeed &&
292 1.1 joff tp->t_cflag == t->c_cflag)
293 1.1 joff return (0);
294 1.1 joff
295 1.1 joff s = splserial();
296 1.1 joff
297 1.1 joff sc->sc_lcrhi = cflag2lcrhi(t->c_cflag);
298 1.1 joff sc->sc_lcrlo = EPCOMSPEED2BRD(t->c_ospeed) & 0xff;
299 1.1 joff sc->sc_lcrmid = EPCOMSPEED2BRD(t->c_ospeed) >> 8;
300 1.1 joff
301 1.1 joff /* And copy to tty. */
302 1.1 joff tp->t_ispeed = 0;
303 1.1 joff tp->t_ospeed = t->c_ospeed;
304 1.1 joff tp->t_cflag = t->c_cflag;
305 1.2 joff epcom_set(sc);
306 1.1 joff
307 1.1 joff splx(s);
308 1.1 joff
309 1.1 joff /*
310 1.1 joff * Update the tty layer's idea of the carrier bit.
311 1.1 joff * We tell tty the carrier is always on.
312 1.1 joff */
313 1.1 joff (void) (*tp->t_linesw->l_modem)(tp, 1);
314 1.1 joff
315 1.1 joff #ifdef COM_DEBUG
316 1.1 joff if (com_debug)
317 1.1 joff comstatus(sc, "comparam ");
318 1.1 joff #endif
319 1.1 joff
320 1.1 joff if (!ISSET(t->c_cflag, CHWFLOW)) {
321 1.1 joff if (sc->sc_tx_stopped) {
322 1.1 joff sc->sc_tx_stopped = 0;
323 1.1 joff epcomstart(tp);
324 1.1 joff }
325 1.1 joff }
326 1.1 joff
327 1.1 joff return (0);
328 1.1 joff }
329 1.1 joff
330 1.1 joff static int
331 1.6 christos epcomhwiflow(struct tty *tp, int block)
332 1.1 joff {
333 1.1 joff return (0);
334 1.1 joff }
335 1.1 joff
336 1.1 joff static void
337 1.1 joff epcom_filltx(struct epcom_softc *sc)
338 1.1 joff {
339 1.1 joff bus_space_tag_t iot = sc->sc_iot;
340 1.1 joff bus_space_handle_t ioh = sc->sc_ioh;
341 1.1 joff int n;
342 1.1 joff
343 1.1 joff n = 0;
344 1.1 joff while ((bus_space_read_4(iot, ioh, EPCOM_Flag) & Flag_TXFF) == 0) {
345 1.1 joff if (n >= sc->sc_tbc)
346 1.1 joff break;
347 1.1 joff bus_space_write_4(iot, ioh, EPCOM_Data,
348 1.1 joff 0xff & *(sc->sc_tba + n));
349 1.1 joff n++;
350 1.1 joff }
351 1.1 joff sc->sc_tbc -= n;
352 1.1 joff sc->sc_tba += n;
353 1.1 joff }
354 1.1 joff
355 1.1 joff static void
356 1.6 christos epcomstart(struct tty *tp)
357 1.1 joff {
358 1.1 joff struct epcom_softc *sc
359 1.1 joff = device_lookup(&epcom_cd, COMUNIT(tp->t_dev));
360 1.1 joff int s;
361 1.1 joff
362 1.1 joff if (COM_ISALIVE(sc) == 0)
363 1.1 joff return;
364 1.1 joff
365 1.1 joff s = spltty();
366 1.1 joff if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP))
367 1.1 joff goto out;
368 1.1 joff if (sc->sc_tx_stopped)
369 1.1 joff goto out;
370 1.1 joff
371 1.1 joff if (tp->t_outq.c_cc <= tp->t_lowat) {
372 1.1 joff if (ISSET(tp->t_state, TS_ASLEEP)) {
373 1.1 joff CLR(tp->t_state, TS_ASLEEP);
374 1.1 joff wakeup(&tp->t_outq);
375 1.1 joff }
376 1.1 joff selwakeup(&tp->t_wsel);
377 1.1 joff if (tp->t_outq.c_cc == 0)
378 1.1 joff goto out;
379 1.1 joff }
380 1.1 joff
381 1.1 joff /* Grab the first contiguous region of buffer space. */
382 1.1 joff {
383 1.1 joff u_char *tba;
384 1.1 joff int tbc;
385 1.1 joff
386 1.1 joff tba = tp->t_outq.c_cf;
387 1.1 joff tbc = ndqb(&tp->t_outq, 0);
388 1.1 joff
389 1.1 joff (void)splserial();
390 1.1 joff
391 1.1 joff sc->sc_tba = tba;
392 1.1 joff sc->sc_tbc = tbc;
393 1.1 joff }
394 1.1 joff
395 1.1 joff SET(tp->t_state, TS_BUSY);
396 1.1 joff sc->sc_tx_busy = 1;
397 1.1 joff
398 1.2 joff /* Output the first chunk of the contiguous buffer. */
399 1.2 joff epcom_filltx(sc);
400 1.2 joff
401 1.1 joff if (!ISSET(sc->sc_ctrl, Ctrl_TIE)) {
402 1.1 joff SET(sc->sc_ctrl, Ctrl_TIE);
403 1.1 joff epcom_set(sc);
404 1.1 joff }
405 1.1 joff
406 1.1 joff out:
407 1.1 joff splx(s);
408 1.1 joff return;
409 1.1 joff }
410 1.1 joff
411 1.1 joff static void
412 1.1 joff epcom_break(struct epcom_softc *sc, int onoff)
413 1.1 joff {
414 1.1 joff if (onoff)
415 1.1 joff SET(sc->sc_lcrhi, LinCtrlHigh_BRK);
416 1.1 joff else
417 1.1 joff CLR(sc->sc_lcrhi, LinCtrlHigh_BRK);
418 1.2 joff epcom_set(sc);
419 1.1 joff }
420 1.1 joff
421 1.1 joff static void
422 1.1 joff epcom_shutdown(struct epcom_softc *sc)
423 1.1 joff {
424 1.1 joff int s;
425 1.1 joff
426 1.1 joff s = splserial();
427 1.1 joff
428 1.1 joff /* Turn off interrupts. */
429 1.1 joff CLR(sc->sc_ctrl, (Ctrl_TIE|Ctrl_RTIE|Ctrl_RIE));
430 1.1 joff
431 1.1 joff /* Clear any break condition set with TIOCSBRK. */
432 1.1 joff epcom_break(sc, 0);
433 1.1 joff epcom_set(sc);
434 1.1 joff
435 1.1 joff if (sc->disable) {
436 1.1 joff #ifdef DIAGNOSTIC
437 1.1 joff if (!sc->enabled)
438 1.1 joff panic("epcom_shutdown: not enabled?");
439 1.1 joff #endif
440 1.1 joff (*sc->disable)(sc);
441 1.1 joff sc->enabled = 0;
442 1.1 joff }
443 1.1 joff splx(s);
444 1.1 joff }
445 1.1 joff
446 1.1 joff int
447 1.6 christos epcomopen(dev_t dev, int flag, int mode, struct lwp *l)
448 1.1 joff {
449 1.1 joff struct epcom_softc *sc;
450 1.1 joff struct tty *tp;
451 1.1 joff int s, s2;
452 1.1 joff int error;
453 1.1 joff
454 1.1 joff sc = device_lookup(&epcom_cd, COMUNIT(dev));
455 1.1 joff if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) ||
456 1.1 joff sc->sc_rbuf == NULL)
457 1.1 joff return (ENXIO);
458 1.1 joff
459 1.7 thorpej if (!device_is_active(&sc->sc_dev))
460 1.1 joff return (ENXIO);
461 1.1 joff
462 1.1 joff #ifdef KGDB
463 1.1 joff /*
464 1.1 joff * If this is the kgdb port, no other use is permitted.
465 1.1 joff */
466 1.1 joff if (ISSET(sc->sc_hwflags, COM_HW_KGDB))
467 1.1 joff return (EBUSY);
468 1.1 joff #endif
469 1.1 joff
470 1.1 joff tp = sc->sc_tty;
471 1.1 joff
472 1.12 elad if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp))
473 1.1 joff return (EBUSY);
474 1.1 joff
475 1.1 joff s = spltty();
476 1.1 joff
477 1.1 joff /*
478 1.1 joff * Do the following iff this is a first open.
479 1.1 joff */
480 1.1 joff if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
481 1.1 joff struct termios t;
482 1.1 joff
483 1.1 joff tp->t_dev = dev;
484 1.1 joff
485 1.1 joff s2 = splserial();
486 1.1 joff
487 1.1 joff if (sc->enable) {
488 1.1 joff if ((*sc->enable)(sc)) {
489 1.1 joff splx(s2);
490 1.1 joff splx(s);
491 1.1 joff printf("%s: device enable failed\n",
492 1.1 joff sc->sc_dev.dv_xname);
493 1.1 joff return (EIO);
494 1.1 joff }
495 1.1 joff sc->enabled = 1;
496 1.1 joff #if 0
497 1.1 joff /* XXXXXXXXXXXXXXX */
498 1.1 joff com_config(sc);
499 1.1 joff #endif
500 1.1 joff }
501 1.1 joff
502 1.1 joff /* Turn on interrupts. */
503 1.1 joff SET(sc->sc_ctrl, (Ctrl_UARTE|Ctrl_RIE|Ctrl_RTIE));
504 1.1 joff epcom_set(sc);
505 1.1 joff
506 1.1 joff #if 0
507 1.1 joff /* Fetch the current modem control status, needed later. */
508 1.1 joff sc->sc_msr = bus_space_read_1(sc->sc_iot, sc->sc_ioh, com_msr);
509 1.1 joff
510 1.1 joff /* Clear PPS capture state on first open. */
511 1.1 joff sc->sc_ppsmask = 0;
512 1.1 joff sc->ppsparam.mode = 0;
513 1.1 joff #endif
514 1.1 joff
515 1.1 joff splx(s2);
516 1.1 joff
517 1.1 joff /*
518 1.1 joff * Initialize the termios status to the defaults. Add in the
519 1.1 joff * sticky bits from TIOCSFLAGS.
520 1.1 joff */
521 1.1 joff t.c_ispeed = 0;
522 1.1 joff if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) {
523 1.1 joff t.c_ospeed = epcomcn_sc.sc_ospeed;
524 1.1 joff t.c_cflag = epcomcn_sc.sc_cflag;
525 1.1 joff } else {
526 1.1 joff t.c_ospeed = TTYDEF_SPEED;
527 1.1 joff t.c_cflag = TTYDEF_CFLAG;
528 1.1 joff }
529 1.1 joff if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL))
530 1.1 joff SET(t.c_cflag, CLOCAL);
531 1.1 joff if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS))
532 1.1 joff SET(t.c_cflag, CRTSCTS);
533 1.1 joff if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF))
534 1.1 joff SET(t.c_cflag, MDMBUF);
535 1.1 joff /* Make sure epcomparam() will do something. */
536 1.1 joff tp->t_ospeed = 0;
537 1.1 joff (void) epcomparam(tp, &t);
538 1.1 joff tp->t_iflag = TTYDEF_IFLAG;
539 1.1 joff tp->t_oflag = TTYDEF_OFLAG;
540 1.1 joff tp->t_lflag = TTYDEF_LFLAG;
541 1.1 joff ttychars(tp);
542 1.1 joff ttsetwater(tp);
543 1.1 joff
544 1.1 joff s2 = splserial();
545 1.1 joff
546 1.1 joff /* Clear the input ring, and unblock. */
547 1.1 joff sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf;
548 1.1 joff sc->sc_rbavail = EPCOM_RING_SIZE;
549 1.1 joff epcom_iflush(sc);
550 1.1 joff CLR(sc->sc_rx_flags, RX_ANY_BLOCK);
551 1.1 joff
552 1.1 joff #ifdef COM_DEBUG
553 1.1 joff if (epcom_debug)
554 1.1 joff comstatus(sc, "epcomopen ");
555 1.1 joff #endif
556 1.1 joff
557 1.1 joff splx(s2);
558 1.1 joff }
559 1.1 joff
560 1.1 joff splx(s);
561 1.1 joff
562 1.1 joff error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK));
563 1.1 joff if (error)
564 1.1 joff goto bad;
565 1.1 joff
566 1.1 joff error = (*tp->t_linesw->l_open)(dev, tp);
567 1.1 joff if (error)
568 1.1 joff goto bad;
569 1.1 joff
570 1.1 joff return (0);
571 1.1 joff
572 1.1 joff bad:
573 1.1 joff if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
574 1.1 joff /*
575 1.1 joff * We failed to open the device, and nobody else had it opened.
576 1.1 joff * Clean up the state as appropriate.
577 1.1 joff */
578 1.1 joff epcom_shutdown(sc);
579 1.1 joff }
580 1.1 joff
581 1.1 joff return (error);
582 1.1 joff }
583 1.1 joff
584 1.1 joff int
585 1.6 christos epcomclose(dev_t dev, int flag, int mode, struct lwp *l)
586 1.1 joff {
587 1.1 joff struct epcom_softc *sc = device_lookup(&epcom_cd, COMUNIT(dev));
588 1.1 joff struct tty *tp = sc->sc_tty;
589 1.1 joff
590 1.1 joff /* XXX This is for cons.c. */
591 1.1 joff if (!ISSET(tp->t_state, TS_ISOPEN))
592 1.1 joff return (0);
593 1.1 joff
594 1.1 joff (*tp->t_linesw->l_close)(tp, flag);
595 1.1 joff ttyclose(tp);
596 1.1 joff
597 1.1 joff if (COM_ISALIVE(sc) == 0)
598 1.1 joff return (0);
599 1.1 joff
600 1.1 joff if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
601 1.1 joff /*
602 1.1 joff * Although we got a last close, the device may still be in
603 1.1 joff * use; e.g. if this was the dialout node, and there are still
604 1.1 joff * processes waiting for carrier on the non-dialout node.
605 1.1 joff */
606 1.1 joff epcom_shutdown(sc);
607 1.1 joff }
608 1.1 joff
609 1.1 joff return (0);
610 1.1 joff }
611 1.1 joff
612 1.1 joff int
613 1.6 christos epcomread(dev_t dev, struct uio *uio, int flag)
614 1.1 joff {
615 1.1 joff struct epcom_softc *sc = device_lookup(&epcom_cd, COMUNIT(dev));
616 1.1 joff struct tty *tp = sc->sc_tty;
617 1.1 joff
618 1.1 joff if (COM_ISALIVE(sc) == 0)
619 1.1 joff return (EIO);
620 1.1 joff
621 1.1 joff return ((*tp->t_linesw->l_read)(tp, uio, flag));
622 1.1 joff }
623 1.1 joff
624 1.1 joff int
625 1.6 christos epcomwrite(dev_t dev, struct uio *uio, int flag)
626 1.1 joff {
627 1.1 joff struct epcom_softc *sc = device_lookup(&epcom_cd, COMUNIT(dev));
628 1.1 joff struct tty *tp = sc->sc_tty;
629 1.1 joff
630 1.1 joff if (COM_ISALIVE(sc) == 0)
631 1.1 joff return (EIO);
632 1.1 joff
633 1.1 joff return ((*tp->t_linesw->l_write)(tp, uio, flag));
634 1.1 joff }
635 1.1 joff
636 1.1 joff int
637 1.6 christos epcompoll(dev_t dev, int events, struct lwp *l)
638 1.1 joff {
639 1.1 joff struct epcom_softc *sc = device_lookup(&epcom_cd, COMUNIT(dev));
640 1.1 joff struct tty *tp = sc->sc_tty;
641 1.1 joff
642 1.1 joff if (COM_ISALIVE(sc) == 0)
643 1.1 joff return (EIO);
644 1.1 joff
645 1.6 christos return ((*tp->t_linesw->l_poll)(tp, events, l));
646 1.1 joff }
647 1.1 joff
648 1.1 joff struct tty *
649 1.6 christos epcomtty(dev_t dev)
650 1.1 joff {
651 1.1 joff struct epcom_softc *sc = device_lookup(&epcom_cd, COMUNIT(dev));
652 1.1 joff struct tty *tp = sc->sc_tty;
653 1.1 joff
654 1.1 joff return (tp);
655 1.1 joff }
656 1.1 joff
657 1.1 joff int
658 1.14 christos epcomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
659 1.1 joff {
660 1.1 joff struct epcom_softc *sc = device_lookup(&epcom_cd, COMUNIT(dev));
661 1.1 joff struct tty *tp = sc->sc_tty;
662 1.1 joff int error;
663 1.1 joff int s;
664 1.1 joff
665 1.1 joff if (COM_ISALIVE(sc) == 0)
666 1.1 joff return (EIO);
667 1.1 joff
668 1.6 christos error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l);
669 1.1 joff if (error != EPASSTHROUGH)
670 1.1 joff return (error);
671 1.1 joff
672 1.6 christos error = ttioctl(tp, cmd, data, flag, l);
673 1.1 joff if (error != EPASSTHROUGH)
674 1.1 joff return (error);
675 1.1 joff
676 1.1 joff error = 0;
677 1.1 joff
678 1.1 joff s = splserial();
679 1.1 joff
680 1.1 joff switch (cmd) {
681 1.1 joff case TIOCSBRK:
682 1.1 joff epcom_break(sc, 1);
683 1.1 joff break;
684 1.1 joff
685 1.1 joff case TIOCCBRK:
686 1.1 joff epcom_break(sc, 0);
687 1.1 joff break;
688 1.1 joff
689 1.1 joff case TIOCGFLAGS:
690 1.1 joff *(int *)data = sc->sc_swflags;
691 1.1 joff break;
692 1.1 joff
693 1.1 joff case TIOCSFLAGS:
694 1.13 elad error = kauth_authorize_device_tty(l->l_cred,
695 1.13 elad KAUTH_DEVICE_TTY_PRIVSET, tp);
696 1.1 joff if (error)
697 1.1 joff break;
698 1.1 joff sc->sc_swflags = *(int *)data;
699 1.1 joff break;
700 1.1 joff
701 1.1 joff default:
702 1.1 joff error = EPASSTHROUGH;
703 1.1 joff break;
704 1.1 joff }
705 1.1 joff
706 1.1 joff splx(s);
707 1.1 joff
708 1.1 joff return (error);
709 1.1 joff }
710 1.1 joff
711 1.1 joff /*
712 1.1 joff * Stop output on a line.
713 1.1 joff */
714 1.1 joff void
715 1.6 christos epcomstop(struct tty *tp, int flag)
716 1.1 joff {
717 1.1 joff struct epcom_softc *sc
718 1.1 joff = device_lookup(&epcom_cd, COMUNIT(tp->t_dev));
719 1.1 joff int s;
720 1.1 joff
721 1.1 joff s = splserial();
722 1.1 joff if (ISSET(tp->t_state, TS_BUSY)) {
723 1.1 joff /* Stop transmitting at the next chunk. */
724 1.1 joff sc->sc_tbc = 0;
725 1.1 joff if (!ISSET(tp->t_state, TS_TTSTOP))
726 1.1 joff SET(tp->t_state, TS_FLUSH);
727 1.1 joff }
728 1.1 joff splx(s);
729 1.1 joff }
730 1.1 joff
731 1.1 joff static u_int
732 1.6 christos cflag2lcrhi(tcflag_t cflag)
733 1.1 joff {
734 1.1 joff u_int lcrhi;
735 1.1 joff
736 1.1 joff switch (cflag & CSIZE) {
737 1.1 joff case CS7:
738 1.1 joff lcrhi = 0x40;
739 1.1 joff break;
740 1.1 joff case CS6:
741 1.1 joff lcrhi = 0x20;
742 1.1 joff break;
743 1.1 joff case CS8:
744 1.1 joff default:
745 1.1 joff lcrhi = 0x60;
746 1.1 joff break;
747 1.1 joff }
748 1.1 joff lcrhi |= (cflag & PARENB) ? LinCtrlHigh_PEN : 0;
749 1.1 joff lcrhi |= (cflag & PARODD) ? 0 : LinCtrlHigh_EPS;
750 1.1 joff lcrhi |= (cflag & CSTOPB) ? LinCtrlHigh_STP2 : 0;
751 1.1 joff lcrhi |= LinCtrlHigh_FEN; /* FIFO always enabled */
752 1.1 joff
753 1.1 joff return (lcrhi);
754 1.1 joff }
755 1.1 joff
756 1.1 joff static void
757 1.6 christos epcom_iflush(struct epcom_softc *sc)
758 1.1 joff {
759 1.1 joff bus_space_tag_t iot = sc->sc_iot;
760 1.1 joff bus_space_handle_t ioh = sc->sc_ioh;
761 1.1 joff #ifdef DIAGNOSTIC
762 1.1 joff int reg;
763 1.1 joff #endif
764 1.1 joff int timo;
765 1.1 joff
766 1.1 joff #ifdef DIAGNOSTIC
767 1.1 joff reg = 0xffff;
768 1.1 joff #endif
769 1.1 joff timo = 50000;
770 1.1 joff /* flush any pending I/O */
771 1.1 joff while ((bus_space_read_4(iot, ioh, EPCOM_Flag) & Flag_RXFE) == 0
772 1.1 joff && --timo)
773 1.1 joff #ifdef DIAGNOSTIC
774 1.1 joff reg =
775 1.1 joff #else
776 1.1 joff (void)
777 1.1 joff #endif
778 1.1 joff bus_space_read_4(iot, ioh, EPCOM_Data);
779 1.1 joff #ifdef DIAGNOSTIC
780 1.1 joff if (!timo)
781 1.1 joff printf("%s: com_iflush timeout %02x\n", sc->sc_dev.dv_xname,
782 1.1 joff reg);
783 1.1 joff #endif
784 1.1 joff }
785 1.1 joff
786 1.1 joff static void
787 1.1 joff epcom_set(struct epcom_softc *sc)
788 1.1 joff {
789 1.1 joff bus_space_write_4(sc->sc_iot, sc->sc_ioh, EPCOM_LinCtrlLow,
790 1.1 joff sc->sc_lcrlo);
791 1.1 joff bus_space_write_4(sc->sc_iot, sc->sc_ioh, EPCOM_LinCtrlMid,
792 1.1 joff sc->sc_lcrmid);
793 1.1 joff bus_space_write_4(sc->sc_iot, sc->sc_ioh, EPCOM_LinCtrlHigh,
794 1.1 joff sc->sc_lcrhi);
795 1.1 joff bus_space_write_4(sc->sc_iot, sc->sc_ioh, EPCOM_Ctrl,
796 1.1 joff sc->sc_ctrl);
797 1.1 joff }
798 1.1 joff
799 1.1 joff int
800 1.6 christos epcomcnattach(bus_space_tag_t iot, bus_addr_t iobase, bus_space_handle_t ioh,
801 1.6 christos int ospeed, tcflag_t cflag)
802 1.1 joff {
803 1.1 joff u_int lcrlo, lcrmid, lcrhi, ctrl, pwrcnt;
804 1.1 joff bus_space_handle_t syscon_ioh;
805 1.1 joff
806 1.1 joff cn_tab = &epcomcons;
807 1.1 joff cn_init_magic(&epcom_cnm_state);
808 1.1 joff cn_set_magic("\047\001");
809 1.1 joff
810 1.1 joff epcomcn_sc.sc_iot = iot;
811 1.1 joff epcomcn_sc.sc_ioh = ioh;
812 1.1 joff epcomcn_sc.sc_hwbase = iobase;
813 1.1 joff epcomcn_sc.sc_ospeed = ospeed;
814 1.1 joff epcomcn_sc.sc_cflag = cflag;
815 1.1 joff
816 1.1 joff lcrhi = cflag2lcrhi(cflag);
817 1.1 joff lcrlo = EPCOMSPEED2BRD(ospeed) & 0xff;
818 1.1 joff lcrmid = EPCOMSPEED2BRD(ospeed) >> 8;
819 1.1 joff ctrl = Ctrl_UARTE;
820 1.1 joff
821 1.1 joff bus_space_map(iot, EP93XX_APB_HWBASE + EP93XX_APB_SYSCON,
822 1.1 joff EP93XX_APB_SYSCON_SIZE, 0, &syscon_ioh);
823 1.1 joff pwrcnt = bus_space_read_4(iot, syscon_ioh, EP93XX_SYSCON_PwrCnt);
824 1.1 joff pwrcnt &= ~(PwrCnt_UARTBAUD);
825 1.1 joff bus_space_write_4(iot, syscon_ioh, EP93XX_SYSCON_PwrCnt, pwrcnt);
826 1.1 joff bus_space_unmap(iot, syscon_ioh, EP93XX_APB_SYSCON_SIZE);
827 1.1 joff
828 1.1 joff bus_space_write_4(iot, ioh, EPCOM_LinCtrlLow, lcrlo);
829 1.1 joff bus_space_write_4(iot, ioh, EPCOM_LinCtrlMid, lcrmid);
830 1.1 joff bus_space_write_4(iot, ioh, EPCOM_LinCtrlHigh, lcrhi);
831 1.1 joff bus_space_write_4(iot, ioh, EPCOM_Ctrl, ctrl);
832 1.1 joff
833 1.1 joff return (0);
834 1.1 joff }
835 1.1 joff
836 1.1 joff void
837 1.6 christos epcomcnprobe(struct consdev *cp)
838 1.1 joff {
839 1.1 joff cp->cn_pri = CN_REMOTE;
840 1.1 joff }
841 1.1 joff
842 1.1 joff void
843 1.6 christos epcomcnpollc(dev_t dev, int on)
844 1.1 joff {
845 1.1 joff }
846 1.1 joff
847 1.1 joff void
848 1.6 christos epcomcnputc(dev_t dev, int c)
849 1.1 joff {
850 1.1 joff int s;
851 1.1 joff bus_space_tag_t iot = epcomcn_sc.sc_iot;
852 1.1 joff bus_space_handle_t ioh = epcomcn_sc.sc_ioh;
853 1.1 joff
854 1.1 joff s = splserial();
855 1.1 joff
856 1.1 joff while((bus_space_read_4(iot, ioh, EPCOM_Flag) & Flag_TXFF) != 0)
857 1.1 joff ;
858 1.1 joff
859 1.1 joff bus_space_write_4(iot, ioh, EPCOM_Data, c);
860 1.1 joff
861 1.1 joff #ifdef DEBUG
862 1.1 joff if (c == '\r') {
863 1.1 joff while((bus_space_read_4(iot, ioh, EPCOM_Flag) & Flag_TXFE) == 0)
864 1.1 joff ;
865 1.1 joff }
866 1.1 joff #endif
867 1.1 joff
868 1.1 joff splx(s);
869 1.1 joff }
870 1.1 joff
871 1.1 joff int
872 1.6 christos epcomcngetc(dev_t dev)
873 1.1 joff {
874 1.1 joff int c, sts;
875 1.1 joff int s;
876 1.1 joff bus_space_tag_t iot = epcomcn_sc.sc_iot;
877 1.1 joff bus_space_handle_t ioh = epcomcn_sc.sc_ioh;
878 1.1 joff
879 1.1 joff s = splserial();
880 1.1 joff
881 1.1 joff while((bus_space_read_4(iot, ioh, EPCOM_Flag) & Flag_RXFE) != 0)
882 1.1 joff ;
883 1.1 joff
884 1.1 joff c = bus_space_read_4(iot, ioh, EPCOM_Data);
885 1.1 joff sts = bus_space_read_4(iot, ioh, EPCOM_RXSts);
886 1.1 joff if (ISSET(sts, RXSts_BE)) c = CNC_BREAK;
887 1.1 joff #ifdef DDB
888 1.1 joff extern int db_active;
889 1.1 joff if (!db_active)
890 1.1 joff #endif
891 1.1 joff {
892 1.1 joff int cn_trapped = 0; /* unused */
893 1.1 joff
894 1.1 joff cn_check_magic(dev, c, epcom_cnm_state);
895 1.1 joff }
896 1.1 joff c &= 0xff;
897 1.1 joff splx(s);
898 1.1 joff
899 1.1 joff return (c);
900 1.1 joff }
901 1.1 joff
902 1.1 joff inline static void
903 1.6 christos epcom_txsoft(struct epcom_softc *sc, struct tty *tp)
904 1.1 joff {
905 1.1 joff CLR(tp->t_state, TS_BUSY);
906 1.1 joff if (ISSET(tp->t_state, TS_FLUSH))
907 1.1 joff CLR(tp->t_state, TS_FLUSH);
908 1.1 joff else
909 1.1 joff ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf));
910 1.1 joff (*tp->t_linesw->l_start)(tp);
911 1.1 joff }
912 1.1 joff
913 1.1 joff inline static void
914 1.6 christos epcom_rxsoft(struct epcom_softc *sc, struct tty *tp)
915 1.1 joff {
916 1.3 he int (*rint) __P((int, struct tty *)) = tp->t_linesw->l_rint;
917 1.1 joff u_char *get, *end;
918 1.1 joff u_int cc, scc;
919 1.1 joff u_char sts;
920 1.1 joff int code;
921 1.1 joff int s;
922 1.1 joff
923 1.1 joff end = sc->sc_ebuf;
924 1.1 joff get = sc->sc_rbget;
925 1.1 joff scc = cc = EPCOM_RING_SIZE - sc->sc_rbavail;
926 1.1 joff #if 0
927 1.1 joff if (cc == EPCOM_RING_SIZE) {
928 1.1 joff sc->sc_floods++;
929 1.1 joff if (sc->sc_errors++ == 0)
930 1.1 joff callout_reset(&sc->sc_diag_callout, 60 * hz,
931 1.1 joff comdiag, sc);
932 1.1 joff }
933 1.1 joff #endif
934 1.1 joff while (cc) {
935 1.1 joff code = get[0];
936 1.1 joff sts = get[1];
937 1.1 joff if (ISSET(sts, RXSts_OE | RXSts_FE | RXSts_PE | RXSts_BE)) {
938 1.1 joff #if 0
939 1.1 joff if (ISSET(lsr, DR_ROR)) {
940 1.1 joff sc->sc_overflows++;
941 1.1 joff if (sc->sc_errors++ == 0)
942 1.1 joff callout_reset(&sc->sc_diag_callout,
943 1.1 joff 60 * hz, comdiag, sc);
944 1.1 joff }
945 1.1 joff #endif
946 1.1 joff if (ISSET(sts, (RXSts_FE|RXSts_BE)))
947 1.1 joff SET(code, TTY_FE);
948 1.1 joff if (ISSET(sts, RXSts_PE))
949 1.1 joff SET(code, TTY_PE);
950 1.1 joff }
951 1.1 joff if ((*rint)(code, tp) == -1) {
952 1.1 joff /*
953 1.1 joff * The line discipline's buffer is out of space.
954 1.1 joff */
955 1.1 joff if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) {
956 1.1 joff /*
957 1.1 joff * We're either not using flow control, or the
958 1.1 joff * line discipline didn't tell us to block for
959 1.1 joff * some reason. Either way, we have no way to
960 1.1 joff * know when there's more space available, so
961 1.1 joff * just drop the rest of the data.
962 1.1 joff */
963 1.1 joff get += cc << 1;
964 1.1 joff if (get >= end)
965 1.1 joff get -= EPCOM_RING_SIZE << 1;
966 1.1 joff cc = 0;
967 1.1 joff } else {
968 1.1 joff /*
969 1.1 joff * Don't schedule any more receive processing
970 1.1 joff * until the line discipline tells us there's
971 1.1 joff * space available (through comhwiflow()).
972 1.1 joff * Leave the rest of the data in the input
973 1.1 joff * buffer.
974 1.1 joff */
975 1.1 joff SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED);
976 1.1 joff }
977 1.1 joff break;
978 1.1 joff }
979 1.1 joff get += 2;
980 1.1 joff if (get >= end)
981 1.1 joff get = sc->sc_rbuf;
982 1.1 joff cc--;
983 1.1 joff }
984 1.1 joff
985 1.1 joff if (cc != scc) {
986 1.1 joff sc->sc_rbget = get;
987 1.1 joff s = splserial();
988 1.1 joff
989 1.1 joff cc = sc->sc_rbavail += scc - cc;
990 1.1 joff /* Buffers should be ok again, release possible block. */
991 1.1 joff if (cc >= 1) {
992 1.1 joff if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) {
993 1.1 joff CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED);
994 1.1 joff SET(sc->sc_ctrl, (Ctrl_RIE|Ctrl_RTIE));
995 1.1 joff epcom_set(sc);
996 1.1 joff }
997 1.1 joff if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) {
998 1.1 joff CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED);
999 1.1 joff #if 0
1000 1.1 joff com_hwiflow(sc);
1001 1.1 joff #endif
1002 1.1 joff }
1003 1.1 joff }
1004 1.1 joff splx(s);
1005 1.1 joff }
1006 1.1 joff }
1007 1.1 joff
1008 1.1 joff static void
1009 1.1 joff epcomsoft(void* arg)
1010 1.1 joff {
1011 1.1 joff struct epcom_softc *sc = arg;
1012 1.1 joff
1013 1.1 joff if (COM_ISALIVE(sc) == 0)
1014 1.1 joff return;
1015 1.1 joff
1016 1.1 joff if (sc->sc_rx_ready) {
1017 1.1 joff sc->sc_rx_ready = 0;
1018 1.1 joff epcom_rxsoft(sc, sc->sc_tty);
1019 1.1 joff }
1020 1.1 joff if (sc->sc_tx_done) {
1021 1.1 joff sc->sc_tx_done = 0;
1022 1.1 joff epcom_txsoft(sc, sc->sc_tty);
1023 1.1 joff }
1024 1.1 joff }
1025 1.1 joff
1026 1.1 joff int
1027 1.1 joff epcomintr(void* arg)
1028 1.1 joff {
1029 1.1 joff struct epcom_softc *sc = arg;
1030 1.1 joff bus_space_tag_t iot = sc->sc_iot;
1031 1.1 joff bus_space_handle_t ioh = sc->sc_ioh;
1032 1.1 joff u_char *put, *end;
1033 1.1 joff u_int cc;
1034 1.1 joff u_int flagr;
1035 1.1 joff u_int intr;
1036 1.1 joff u_int32_t c, csts;
1037 1.1 joff
1038 1.1 joff intr = bus_space_read_4(iot, ioh, EPCOM_IntIDIntClr);
1039 1.1 joff
1040 1.1 joff if (COM_ISALIVE(sc) == 0)
1041 1.1 joff panic("intr on disabled epcom");
1042 1.1 joff
1043 1.1 joff flagr = bus_space_read_4(iot, ioh, EPCOM_Flag);
1044 1.1 joff
1045 1.1 joff end = sc->sc_ebuf;
1046 1.1 joff put = sc->sc_rbput;
1047 1.1 joff cc = sc->sc_rbavail;
1048 1.1 joff
1049 1.1 joff if (!(ISSET(flagr, Flag_RXFE))) {
1050 1.1 joff if (!ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) {
1051 1.1 joff while (cc > 0) {
1052 1.1 joff if (ISSET(flagr, Flag_RXFE))
1053 1.1 joff break;
1054 1.1 joff c = bus_space_read_4(iot, ioh, EPCOM_Data);
1055 1.1 joff csts = bus_space_read_4(iot, ioh, EPCOM_RXSts);
1056 1.1 joff if (ISSET(csts, RXSts_BE)) {
1057 1.1 joff int cn_trapped = 0;
1058 1.1 joff
1059 1.1 joff cn_check_magic(sc->sc_tty->t_dev,
1060 1.1 joff CNC_BREAK, epcom_cnm_state);
1061 1.1 joff if (cn_trapped)
1062 1.1 joff goto next;
1063 1.1 joff #if defined(KGDB) && !defined(DDB)
1064 1.1 joff if (ISSET(sc->sc_hwflags, COM_HW_KGDB)){
1065 1.1 joff kgdb_connect(1);
1066 1.1 joff goto next;
1067 1.1 joff }
1068 1.1 joff #endif
1069 1.1 joff } else {
1070 1.1 joff int cn_trapped = 0;
1071 1.1 joff
1072 1.1 joff cn_check_magic(sc->sc_tty->t_dev,
1073 1.1 joff (c & 0xff), epcom_cnm_state);
1074 1.1 joff if (cn_trapped)
1075 1.1 joff goto next;
1076 1.1 joff }
1077 1.1 joff
1078 1.1 joff
1079 1.1 joff put[0] = c & 0xff;
1080 1.1 joff put[1] = csts & 0xf;
1081 1.1 joff put += 2;
1082 1.1 joff if (put >= end)
1083 1.1 joff put = sc->sc_rbuf;
1084 1.1 joff cc--;
1085 1.1 joff next:
1086 1.1 joff flagr = bus_space_read_4(iot, ioh, EPCOM_Flag);
1087 1.1 joff }
1088 1.1 joff
1089 1.1 joff /*
1090 1.1 joff * Current string of incoming characters ended because
1091 1.1 joff * no more data was available or we ran out of space.
1092 1.1 joff * Schedule a receive event if any data was received.
1093 1.1 joff * If we're out of space, turn off receive interrupts.
1094 1.1 joff */
1095 1.1 joff sc->sc_rbput = put;
1096 1.1 joff sc->sc_rbavail = cc;
1097 1.1 joff if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED))
1098 1.1 joff sc->sc_rx_ready = 1;
1099 1.1 joff
1100 1.1 joff /*
1101 1.1 joff * See if we are in danger of overflowing a buffer. If
1102 1.1 joff * so, use hardware flow control to ease the pressure.
1103 1.1 joff */
1104 1.1 joff
1105 1.1 joff /* but epcom cannot. X-( */
1106 1.1 joff
1107 1.1 joff /*
1108 1.1 joff * If we're out of space, disable receive interrupts
1109 1.1 joff * until the queue has drained a bit.
1110 1.1 joff */
1111 1.1 joff if (!cc) {
1112 1.1 joff SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED);
1113 1.1 joff CLR(sc->sc_ctrl, (Ctrl_RIE|Ctrl_RTIE));
1114 1.1 joff epcom_set(sc);
1115 1.1 joff }
1116 1.1 joff } else {
1117 1.1 joff #ifdef DIAGNOSTIC
1118 1.1 joff panic("epcomintr: we shouldn't reach here");
1119 1.1 joff #endif
1120 1.1 joff CLR(sc->sc_ctrl, (Ctrl_RIE|Ctrl_RTIE));
1121 1.1 joff epcom_set(sc);
1122 1.1 joff }
1123 1.1 joff }
1124 1.1 joff
1125 1.1 joff /*
1126 1.1 joff * Done handling any receive interrupts. See if data can be
1127 1.1 joff * transmitted as well. Schedule tx done event if no data left
1128 1.1 joff * and tty was marked busy.
1129 1.1 joff */
1130 1.2 joff
1131 1.2 joff if (!ISSET(flagr, Flag_TXFF) && sc->sc_tbc > 0) {
1132 1.2 joff /* Output the next chunk of the contiguous buffer, if any. */
1133 1.2 joff epcom_filltx(sc);
1134 1.2 joff } else {
1135 1.2 joff /* Disable transmit completion interrupts if necessary. */
1136 1.2 joff if (ISSET(sc->sc_ctrl, Ctrl_TIE)) {
1137 1.2 joff CLR(sc->sc_ctrl, Ctrl_TIE);
1138 1.1 joff epcom_set(sc);
1139 1.1 joff }
1140 1.2 joff if (sc->sc_tx_busy) {
1141 1.2 joff sc->sc_tx_busy = 0;
1142 1.2 joff sc->sc_tx_done = 1;
1143 1.1 joff }
1144 1.1 joff }
1145 1.1 joff
1146 1.1 joff /* Wake up the poller. */
1147 1.1 joff softintr_schedule(sc->sc_si);
1148 1.1 joff
1149 1.1 joff #if 0 /* XXX: broken */
1150 1.1 joff #if NRND > 0 && defined(RND_COM)
1151 1.1 joff rnd_add_uint32(&sc->rnd_source, intr ^ flagr);
1152 1.1 joff #endif
1153 1.1 joff #endif
1154 1.1 joff return (1);
1155 1.1 joff }
1156