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cardslot.c revision 1.18 
      1 /*	$NetBSD: cardslot.c,v 1.18 2002/09/27 03:18:10 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1999 and 2000
      5  *       HAYAKAWA Koichi.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by HAYAKAWA Koichi.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission.
     20  *
     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
     24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     25  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
     26  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     27  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     28  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     30  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
     31  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     32  * POSSIBILITY OF SUCH DAMAGE.
     33  */
     34 
     35 #include <sys/cdefs.h>
     36 __KERNEL_RCSID(0, "$NetBSD: cardslot.c,v 1.18 2002/09/27 03:18:10 thorpej Exp $");
     37 
     38 #include "opt_cardslot.h"
     39 
     40 #include <sys/param.h>
     41 #include <sys/systm.h>
     42 #include <sys/device.h>
     43 #include <sys/malloc.h>
     44 #include <sys/kernel.h>
     45 #include <sys/syslog.h>
     46 #include <sys/kthread.h>
     47 
     48 #include <machine/bus.h>
     49 
     50 #include <dev/cardbus/cardslotvar.h>
     51 #include <dev/cardbus/cardbusvar.h>
     52 #include <dev/pcmcia/pcmciavar.h>
     53 #include <dev/pcmcia/pcmciachip.h>
     54 #include <dev/ic/i82365var.h>
     55 
     56 
     57 #if defined CARDSLOT_DEBUG
     58 #define STATIC
     59 #define DPRINTF(a) printf a
     60 #else
     61 #define STATIC static
     62 #define DPRINTF(a)
     63 #endif
     64 
     65 
     66 
     67 STATIC void cardslotattach __P((struct device *, struct device *, void *));
     68 
     69 STATIC int cardslotmatch __P((struct device *, struct cfdata *, void *));
     70 static void create_slot_manager __P((void *));
     71 static void cardslot_event_thread __P((void *arg));
     72 
     73 STATIC int cardslot_cb_print __P((void *aux, const char *pcic));
     74 static int cardslot_16_print __P((void *, const char *));
     75 static int cardslot_16_submatch __P((struct device *, struct cfdata *,void *));
     76 
     77 struct cfattach cardslot_ca = {
     78 	sizeof(struct cardslot_softc), cardslotmatch, cardslotattach
     79 };
     80 
     81 
     82 STATIC int
     83 cardslotmatch(parent, cf, aux)
     84 	struct device *parent;
     85 	struct cfdata *cf;
     86 	void *aux;
     87 {
     88 	struct cardslot_attach_args *caa = aux;
     89 
     90 	if (caa->caa_cb_attach == NULL && caa->caa_16_attach == NULL) {
     91 		/* Neither CardBus nor 16-bit PCMCIA are defined. */
     92 		return 0;
     93 	}
     94 
     95 	return 1;
     96 }
     97 
     98 
     99 
    100 STATIC void
    101 cardslotattach(parent, self, aux)
    102 	struct device *parent;
    103 	struct device *self;
    104 	void *aux;
    105 {
    106 	struct cardslot_softc *sc = (struct cardslot_softc *)self;
    107 	struct cardslot_attach_args *caa = aux;
    108 
    109 	struct cbslot_attach_args *cba = caa->caa_cb_attach;
    110 	struct pcmciabus_attach_args *pa = caa->caa_16_attach;
    111 
    112 	struct cardbus_softc *csc;
    113 	struct pcmcia_softc *psc;
    114 
    115 	sc->sc_slot = sc->sc_dev.dv_unit;
    116 	sc->sc_cb_softc = NULL;
    117 	sc->sc_16_softc = NULL;
    118 	SIMPLEQ_INIT(&sc->sc_events);
    119 	sc->sc_th_enable = 0;
    120 
    121 	printf(" slot %d flags %x\n", sc->sc_slot, sc->sc_dev.dv_cfdata->cf_flags);
    122 
    123 	DPRINTF(("%s attaching CardBus bus...\n", sc->sc_dev.dv_xname));
    124 	if (cba != NULL) {
    125 		if (NULL != (csc = (void *)config_found(self, cba, cardslot_cb_print))) {
    126 			/* cardbus found */
    127 			DPRINTF(("cardslotattach: found cardbus on %s\n", sc->sc_dev.dv_xname));
    128 			sc->sc_cb_softc = csc;
    129 		}
    130 	}
    131 
    132 	if (pa != NULL) {
    133 		if (NULL != (psc = (void *)config_found_sm(self, pa,
    134 		    cardslot_16_print, cardslot_16_submatch))) {
    135 			/* pcmcia 16-bit bus found */
    136 			DPRINTF(("cardslotattach: found 16-bit pcmcia bus\n"));
    137 			sc->sc_16_softc = psc;
    138 			/*
    139 			 * XXX:
    140 			 * dirty.  This code should be removed to achieve MI.
    141 			 */
    142 			caa->caa_ph->pcmcia = (struct device *)psc;
    143 		}
    144 	}
    145 
    146 	if (csc != NULL || psc != NULL) {
    147 		config_pending_incr();
    148 		kthread_create(create_slot_manager, (void *)sc);
    149 	}
    150 
    151 	if (csc && (csc->sc_cf->cardbus_ctrl)(csc->sc_cc, CARDBUS_CD)) {
    152 		DPRINTF(("cardslotattach: CardBus card found\n"));
    153 		/* attach deferred */
    154 		cardslot_event_throw(sc, CARDSLOT_EVENT_INSERTION_CB);
    155 	}
    156 
    157 	if (psc && (psc->pct->card_detect)(psc->pch)) {
    158 		DPRINTF(("cardbusattach: 16-bit card found\n"));
    159 		/* attach deferred */
    160 		cardslot_event_throw(sc, CARDSLOT_EVENT_INSERTION_16);
    161 	}
    162 }
    163 
    164 
    165 
    166 STATIC int
    167 cardslot_cb_print(aux, pnp)
    168 	void *aux;
    169 	const char *pnp;
    170 {
    171 	struct cbslot_attach_args *cba = aux;
    172 
    173 	if (pnp) {
    174 		printf("cardbus at %s subordinate bus %d", pnp, cba->cba_bus);
    175 	}
    176 
    177 	return UNCONF;
    178 }
    179 
    180 
    181 static int
    182 cardslot_16_submatch(parent, cf, aux)
    183 	struct device *parent;
    184 	struct cfdata *cf;
    185 	void *aux;
    186 {
    187 
    188 	if (cf->cf_loc[PCMCIABUSCF_CONTROLLER] != PCMCIABUSCF_CONTROLLER_DEFAULT
    189 	    && cf->cf_loc[PCMCIABUSCF_CONTROLLER] != 0) {
    190 		return 0;
    191 	}
    192 
    193 	if ((cf->cf_loc[PCMCIABUSCF_CONTROLLER] == PCMCIABUSCF_CONTROLLER_DEFAULT)) {
    194 		return (config_match(parent, cf, aux));
    195 	}
    196 
    197 	return 0;
    198 }
    199 
    200 
    201 
    202 static int
    203 cardslot_16_print(arg, pnp)
    204 	void *arg;
    205 	const char *pnp;
    206 {
    207 
    208 	if (pnp) {
    209 		printf("pcmciabus at %s", pnp);
    210 	}
    211 
    212 	return UNCONF;
    213 }
    214 
    215 
    216 
    217 
    218 static void
    219 create_slot_manager(arg)
    220 	void *arg;
    221 {
    222 	struct cardslot_softc *sc = (struct cardslot_softc *)arg;
    223 
    224 	sc->sc_th_enable = 1;
    225 
    226 	if (kthread_create1(cardslot_event_thread, sc, &sc->sc_event_thread,
    227 	    "%s", sc->sc_dev.dv_xname)) {
    228 		printf("%s: unable to create event thread for slot %d\n",
    229 		    sc->sc_dev.dv_xname, sc->sc_slot);
    230 		panic("create_slot_manager");
    231 	}
    232 }
    233 
    234 
    235 
    236 
    237 /*
    238  * void cardslot_event_throw(struct cardslot_softc *sc, int ev)
    239  *
    240  *   This function throws an event to the event handler.  If the state
    241  *   of a slot is changed, it should be noticed using this function.
    242  */
    243 void
    244 cardslot_event_throw(sc, ev)
    245 	struct cardslot_softc *sc;
    246 	int ev;
    247 {
    248 	struct cardslot_event *ce;
    249 
    250 	DPRINTF(("cardslot_event_throw: an event %s comes\n",
    251 	    ev == CARDSLOT_EVENT_INSERTION_CB ? "CardBus Card inserted" :
    252 	    ev == CARDSLOT_EVENT_INSERTION_16 ? "16-bit Card inserted" :
    253 	    ev == CARDSLOT_EVENT_REMOVAL_CB ? "CardBus Card removed" :
    254 	    ev == CARDSLOT_EVENT_REMOVAL_16 ? "16-bit Card removed" : "???"));
    255 
    256 	if (NULL == (ce = (struct cardslot_event *)malloc(sizeof (struct cardslot_event), M_TEMP, M_NOWAIT))) {
    257 		panic("cardslot_enevt");
    258 	}
    259 
    260 	ce->ce_type = ev;
    261 
    262 	{
    263 		int s = spltty();
    264 		SIMPLEQ_INSERT_TAIL(&sc->sc_events, ce, ce_q);
    265 		splx(s);
    266 	}
    267 
    268 	wakeup(&sc->sc_events);
    269 
    270 	return;
    271 }
    272 
    273 
    274 /*
    275  * static void cardslot_event_thread(void *arg)
    276  *
    277  *   This function is the main routine handing cardslot events such as
    278  *   insertions and removals.
    279  *
    280  */
    281 static void
    282 cardslot_event_thread(arg)
    283 	void *arg;
    284 {
    285 	struct cardslot_softc *sc = arg;
    286 	struct cardslot_event *ce;
    287 	int s, first = 1;
    288 	static int antonym_ev[4] = {
    289 		CARDSLOT_EVENT_REMOVAL_16, CARDSLOT_EVENT_INSERTION_16,
    290 		CARDSLOT_EVENT_REMOVAL_CB, CARDSLOT_EVENT_INSERTION_CB
    291 	};
    292 
    293 	while (sc->sc_th_enable) {
    294 		s = spltty();
    295 		if ((ce = SIMPLEQ_FIRST(&sc->sc_events)) == NULL) {
    296 			splx(s);
    297 			if (first) {
    298 				first = 0;
    299 				config_pending_decr();
    300 			}
    301 			(void) tsleep(&sc->sc_events, PWAIT, "cardslotev", 0);
    302 			continue;
    303 		}
    304 		SIMPLEQ_REMOVE_HEAD(&sc->sc_events, ce_q);
    305 		splx(s);
    306 
    307 		if (IS_CARDSLOT_INSERT_REMOVE_EV(ce->ce_type)) {
    308 			/* Chattering supression */
    309 			s = spltty();
    310 			while (1) {
    311 				struct cardslot_event *ce1, *ce2;
    312 
    313 				if ((ce1 = SIMPLEQ_FIRST(&sc->sc_events)) == NULL) {
    314 					break;
    315 				}
    316 				if (ce1->ce_type != antonym_ev[ce->ce_type]) {
    317 					break;
    318 				}
    319 				if ((ce2 = SIMPLEQ_NEXT(ce1, ce_q)) == NULL) {
    320 					break;
    321 				}
    322 				if (ce2->ce_type == ce->ce_type) {
    323 					SIMPLEQ_REMOVE_HEAD(&sc->sc_events,
    324 					    ce_q);
    325 					free(ce1, M_TEMP);
    326 					SIMPLEQ_REMOVE_HEAD(&sc->sc_events,
    327 					    ce_q);
    328 					free(ce2, M_TEMP);
    329 				}
    330 			}
    331 			splx(s);
    332 		}
    333 
    334 		switch (ce->ce_type) {
    335 		case CARDSLOT_EVENT_INSERTION_CB:
    336 			if ((CARDSLOT_CARDTYPE(sc->sc_status) == CARDSLOT_STATUS_CARD_CB)
    337 			    || (CARDSLOT_CARDTYPE(sc->sc_status) == CARDSLOT_STATUS_CARD_16)) {
    338 				if (CARDSLOT_WORK(sc->sc_status) == CARDSLOT_STATUS_WORKING) {
    339 					/*
    340 					 * A card has already been
    341 					 * inserted and works.
    342 					 */
    343 					break;
    344 				}
    345 			}
    346 
    347 			if (sc->sc_cb_softc) {
    348 				CARDSLOT_SET_CARDTYPE(sc->sc_status,
    349 				    CARDSLOT_STATUS_CARD_CB);
    350 				if (cardbus_attach_card(sc->sc_cb_softc) > 0) {
    351 					/* at least one function works */
    352 					CARDSLOT_SET_WORK(sc->sc_status, CARDSLOT_STATUS_WORKING);
    353 				} else {
    354 					/*
    355 					 * no functions work or this
    356 					 * card is not known
    357 					 */
    358 					CARDSLOT_SET_WORK(sc->sc_status,
    359 					    CARDSLOT_STATUS_NOTWORK);
    360 				}
    361 			} else {
    362 				panic("no cardbus on %s", sc->sc_dev.dv_xname);
    363 			}
    364 
    365 			break;
    366 
    367 		case CARDSLOT_EVENT_INSERTION_16:
    368 			if ((CARDSLOT_CARDTYPE(sc->sc_status) == CARDSLOT_STATUS_CARD_CB)
    369 			    || (CARDSLOT_CARDTYPE(sc->sc_status) == CARDSLOT_STATUS_CARD_16)) {
    370 				if (CARDSLOT_WORK(sc->sc_status) == CARDSLOT_STATUS_WORKING) {
    371 					/*
    372 					 * A card has already been
    373 					 * inserted and work.
    374 					 */
    375 					break;
    376 				}
    377 			}
    378 			if (sc->sc_16_softc) {
    379 				CARDSLOT_SET_CARDTYPE(sc->sc_status, CARDSLOT_STATUS_CARD_16);
    380 				if (pcmcia_card_attach((struct device *)sc->sc_16_softc)) {
    381 					/* Do not attach */
    382 					CARDSLOT_SET_WORK(sc->sc_status,
    383 					    CARDSLOT_STATUS_NOTWORK);
    384 				} else {
    385 					/* working */
    386 					CARDSLOT_SET_WORK(sc->sc_status,
    387 					    CARDSLOT_STATUS_WORKING);
    388 				}
    389 			} else {
    390 				panic("no 16-bit pcmcia on %s", sc->sc_dev.dv_xname);
    391 			}
    392 
    393 			break;
    394 
    395 		case CARDSLOT_EVENT_REMOVAL_CB:
    396 			if (CARDSLOT_CARDTYPE(sc->sc_status) == CARDSLOT_STATUS_CARD_CB) {
    397 				/* CardBus card has not been inserted. */
    398 				if (CARDSLOT_WORK(sc->sc_status) == CARDSLOT_STATUS_WORKING) {
    399 					cardbus_detach_card(sc->sc_cb_softc);
    400 					CARDSLOT_SET_WORK(sc->sc_status,
    401 					    CARDSLOT_STATUS_NOTWORK);
    402 					CARDSLOT_SET_WORK(sc->sc_status,
    403 					    CARDSLOT_STATUS_CARD_NONE);
    404 				}
    405 				CARDSLOT_SET_CARDTYPE(sc->sc_status,
    406 				    CARDSLOT_STATUS_CARD_NONE);
    407 			} else if (CARDSLOT_CARDTYPE(sc->sc_status) != CARDSLOT_STATUS_CARD_16) {
    408 				/* Unknown card... */
    409 				CARDSLOT_SET_CARDTYPE(sc->sc_status,
    410 				    CARDSLOT_STATUS_CARD_NONE);
    411 			}
    412 			CARDSLOT_SET_WORK(sc->sc_status,
    413 			    CARDSLOT_STATUS_NOTWORK);
    414 			break;
    415 
    416 		case CARDSLOT_EVENT_REMOVAL_16:
    417 			DPRINTF(("%s: removal event\n", sc->sc_dev.dv_xname));
    418 			if (CARDSLOT_CARDTYPE(sc->sc_status) != CARDSLOT_STATUS_CARD_16) {
    419 				/* 16-bit card has not been inserted. */
    420 				break;
    421 			}
    422 			if ((sc->sc_16_softc != NULL)
    423 			    && (CARDSLOT_WORK(sc->sc_status) == CARDSLOT_STATUS_WORKING)) {
    424 				struct pcmcia_softc *psc = sc->sc_16_softc;
    425 
    426 				pcmcia_card_deactivate((struct device *)psc);
    427 				pcmcia_chip_socket_disable(psc->pct, psc->pch);
    428 				pcmcia_card_detach((struct device *)psc, DETACH_FORCE);
    429 			}
    430 			CARDSLOT_SET_CARDTYPE(sc->sc_status, CARDSLOT_STATUS_CARD_NONE);
    431 			CARDSLOT_SET_WORK(sc->sc_status, CARDSLOT_STATUS_NOTWORK);
    432 			break;
    433 
    434 		default:
    435 			panic("cardslot_event_thread: unknown event %d", ce->ce_type);
    436 		}
    437 		free(ce, M_TEMP);
    438 	}
    439 
    440 	sc->sc_event_thread = NULL;
    441 
    442 	/* In case the parent device is waiting for us to exit. */
    443 	wakeup(sc);
    444 
    445 	kthread_exit(0);
    446 }
    447