path: root/sys/dev/cardbus/cardslot.c

/*	$OpenBSD: cardslot.c,v 1.6 2004/07/25 00:13:29 brad Exp $ */
/*	$NetBSD: cardslot.c,v 1.9 2000/03/22 09:35:06 haya Exp $	*/

/*
 * Copyright (c) 1999 and 2000
 *       HAYAKAWA Koichi.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by HAYAKAWA Koichi.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/kthread.h>

#include <machine/bus.h>

#include <dev/cardbus/cardslotvar.h>
#include <dev/cardbus/cardbusvar.h>
#include <dev/pcmcia/pcmciavar.h>
#include <dev/pcmcia/pcmciachip.h>
#include <dev/ic/i82365var.h>

#if defined CARDSLOT_DEBUG
#define STATIC
#define DPRINTF(a) printf a
#else
#define STATIC static
#define DPRINTF(a)
#endif



STATIC void cardslotattach(struct device *, struct device *, void *);

STATIC int cardslotmatch(struct device *, void *, void *);
static void create_slot_manager(void *);
static void cardslot_event_thread(void *arg);

STATIC int cardslot_cb_print(void *aux, const char *pcic);
static int cardslot_16_print(void *, const char *);
static int cardslot_16_submatch(struct device *, void *,void *);

struct cfattach cardslot_ca = {
	sizeof(struct cardslot_softc), cardslotmatch, cardslotattach
};

#ifndef __NetBSD_Version__
struct cfdriver cardslot_cd = {
	NULL, "cardslot", DV_DULL
};
#endif


STATIC int
cardslotmatch(parent, match, aux)
     struct device *parent;
     void *match;
     void *aux;
{
  struct cardslot_attach_args *caa = aux;

  if (caa->caa_cb_attach == NULL && caa->caa_16_attach == NULL) {
    /* Neither CardBus nor 16-bit PCMCIA are defined. */
    return 0;
  }

  return 1;
}



STATIC void
cardslotattach(parent, self, aux)
     struct device *parent;
     struct device *self;
     void *aux;
{
  struct cardslot_softc *sc = (struct cardslot_softc *)self;
  struct cardslot_attach_args *caa = aux;

  struct cbslot_attach_args *cba = caa->caa_cb_attach;
  struct pcmciabus_attach_args *pa = caa->caa_16_attach;

  struct cardbus_softc *csc;
  struct pcmcia_softc *psc;

  sc->sc_slot = sc->sc_dev.dv_unit;
  sc->sc_cb_softc = NULL;
  sc->sc_16_softc = NULL;
  SIMPLEQ_INIT(&sc->sc_events);
  sc->sc_th_enable = 0;

  printf(" slot %d flags %x\n", sc->sc_slot, sc->sc_dev.dv_cfdata->cf_flags);

  DPRINTF(("%s attaching CardBus bus...\n", sc->sc_dev.dv_xname));
  if (cba != NULL) {
    if (NULL != (csc = (void *)config_found(self, cba, cardslot_cb_print))) {
      /* cardbus found */
      DPRINTF(("cardslotattach: found cardbus on %s\n", sc->sc_dev.dv_xname));
      sc->sc_cb_softc = csc;
    }
  }

  if (pa != NULL) {
    if (NULL != (psc = (void *)config_found_sm(self, pa, cardslot_16_print, 
				       cardslot_16_submatch))) {
      /* pcmcia 16-bit bus found */
      DPRINTF(("cardslotattach: found 16-bit pcmcia bus\n"));
      sc->sc_16_softc = psc;
      /* XXX: dirty.  This code should be removed to achieve MI */
      caa->caa_ph->pcmcia = (struct device *)psc;
    }
  }

  if (csc != NULL || psc != NULL)
    kthread_create_deferred(create_slot_manager, (void *)sc);

  if (csc && (csc->sc_cf->cardbus_ctrl)(csc->sc_cc, CARDBUS_CD)) {
    DPRINTF(("cardslotattach: CardBus card found\n"));
    /* attach deferred */
    cardslot_event_throw(sc, CARDSLOT_EVENT_INSERTION_CB);
  }

  if (psc && (psc->pct->card_detect)(psc->pch)) {
    DPRINTF(("cardbusattach: 16-bit card found\n"));
    /* attach deferred */
    cardslot_event_throw(sc, CARDSLOT_EVENT_INSERTION_16);
  }
}



STATIC int
cardslot_cb_print(aux, pnp)
	void *aux;
	const char *pnp;
{
	struct cbslot_attach_args *cba = aux;

	if (pnp) {
		printf("cardbus at %s subordinate bus %d", pnp, cba->cba_bus);
	}

	return UNCONF;
}


static int
cardslot_16_submatch(parent, match, aux)
     struct device *parent;
     void *match;
     void *aux;
{
  struct cfdata *cf = match;

  if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != 0)
    return 0;

  if (cf->cf_loc[0] == -1) {
    return ((*cf->cf_attach->ca_match)(parent, cf, aux));
  }

  return 0;
}



static int
cardslot_16_print(arg, pnp)
     void *arg;
     const char *pnp;
{

  if (pnp) {
    printf("pcmciabus at %s", pnp);
  }

  return UNCONF;
}




static void
create_slot_manager(arg)
     void *arg;
{
  struct cardslot_softc *sc = (struct cardslot_softc *)arg;

  sc->sc_th_enable = 1;

 if (kthread_create(cardslot_event_thread, sc, &sc->sc_event_thread, "%s",
		     sc->sc_dev.dv_xname)) {
    printf("%s: unable to create event thread for slot %d\n",
	   sc->sc_dev.dv_xname, sc->sc_slot);
    panic("create_slot_manager");
  }
}




/*
 * void cardslot_event_throw(struct cardslot_softc *sc, int ev)
 *
 *   This function throws an event to the event handler.  If the state
 *   of a slot is changed, it should be noticed using this function.
 */
void
cardslot_event_throw(sc, ev)
     struct cardslot_softc *sc;
     int ev;
{
  struct cardslot_event *ce;

  DPRINTF(("cardslot_event_throw: an event %s comes\n",
	   ev == CARDSLOT_EVENT_INSERTION_CB ? "CardBus Card inserted" :
	   ev == CARDSLOT_EVENT_INSERTION_16 ? "16-bit Card inserted" :
	   ev == CARDSLOT_EVENT_REMOVAL_CB ? "CardBus Card removed" :
	   ev == CARDSLOT_EVENT_REMOVAL_16 ? "16-bit Card removed" : "???"));

  if (NULL == (ce = (struct cardslot_event *)malloc(sizeof (struct cardslot_event), M_TEMP, M_NOWAIT))) {
    panic("cardslot_event");
  }

  ce->ce_type = ev;

  {
    int s = spltty();
    SIMPLEQ_INSERT_TAIL(&sc->sc_events, ce, ce_q);
    splx(s);
  }

  wakeup(&sc->sc_events);

  return;
}


/*
 * static void cardslot_event_thread(void *arg)
 *
 *   This function is the main routine handing cardslot events such as
 *   insertions and removals.
 *
 */
static void
cardslot_event_thread(arg)
     void *arg;
{
  struct cardslot_softc *sc = arg;
  struct cardslot_event *ce;
  int s;
  static int antonym_ev[4] = {
    CARDSLOT_EVENT_REMOVAL_16, CARDSLOT_EVENT_INSERTION_16,
    CARDSLOT_EVENT_REMOVAL_CB, CARDSLOT_EVENT_INSERTION_CB
  };

  while (sc->sc_th_enable) {
    s = spltty();
    if ((ce = SIMPLEQ_FIRST(&sc->sc_events)) == NULL) {
      splx(s);
      (void) tsleep(&sc->sc_events, PWAIT, "cardslotev", 0);
      continue;
    }
    SIMPLEQ_REMOVE_HEAD(&sc->sc_events, ce_q);
    splx(s);

    if (IS_CARDSLOT_INSERT_REMOVE_EV(ce->ce_type)) {
      /* Chattering suppression */
      s = spltty();
      while (1) {
	struct cardslot_event *ce1, *ce2;

	if ((ce1 = SIMPLEQ_FIRST(&sc->sc_events)) == NULL) {
	  break;
	}
	if (ce1->ce_type != antonym_ev[ce->ce_type]) {
	  break;
	}
	if ((ce2 = SIMPLEQ_NEXT(ce1, ce_q)) == NULL) {
	  break;
	}
	if (ce2->ce_type == ce->ce_type) {
	  SIMPLEQ_REMOVE_HEAD(&sc->sc_events, ce_q);
	  free(ce1, M_TEMP);
	  SIMPLEQ_REMOVE_HEAD(&sc->sc_events, ce_q);
	  free(ce2, M_TEMP);
	}
      }
      splx(s);
    }

    switch (ce->ce_type) {
    case CARDSLOT_EVENT_INSERTION_CB:
      if ((CARDSLOT_CARDTYPE(sc->sc_status) == CARDSLOT_STATUS_CARD_CB)
	  || (CARDSLOT_CARDTYPE(sc->sc_status) == CARDSLOT_STATUS_CARD_16)) {
	if (CARDSLOT_WORK(sc->sc_status) == CARDSLOT_STATUS_WORKING) {
	  /* A card has already been inserted and works. */
	  break;
	}
      }

      if (sc->sc_cb_softc) {
	CARDSLOT_SET_CARDTYPE(sc->sc_status, CARDSLOT_STATUS_CARD_CB);
	if (cardbus_attach_card(sc->sc_cb_softc) > 0) {
	  /* at least one function works */
	  CARDSLOT_SET_WORK(sc->sc_status, CARDSLOT_STATUS_WORKING);
	} else {
	  /* no functions work or this card is not known */
	  CARDSLOT_SET_WORK(sc->sc_status, CARDSLOT_STATUS_NOTWORK);
	}
      } else {
	panic("no cardbus on %s", sc->sc_dev.dv_xname);
      }

      break;

    case CARDSLOT_EVENT_INSERTION_16:
      if ((CARDSLOT_CARDTYPE(sc->sc_status) == CARDSLOT_STATUS_CARD_CB)
	  || (CARDSLOT_CARDTYPE(sc->sc_status) == CARDSLOT_STATUS_CARD_16)) {
	if (CARDSLOT_WORK(sc->sc_status) == CARDSLOT_STATUS_WORKING) {
	  /* A card has already been inserted and works. */
	  break;
	}
      }
      if (sc->sc_16_softc) {
	CARDSLOT_SET_CARDTYPE(sc->sc_status, CARDSLOT_STATUS_CARD_16);
	if (pcmcia_card_attach((struct device *)sc->sc_16_softc)) {
	  /* Do not attach */
	  CARDSLOT_SET_WORK(sc->sc_status, CARDSLOT_STATUS_NOTWORK);
	} else {
	  /* working */
	  CARDSLOT_SET_WORK(sc->sc_status, CARDSLOT_STATUS_WORKING);
	}
      } else {
	panic("no 16-bit pcmcia on %s", sc->sc_dev.dv_xname);
      }

      break;

    case CARDSLOT_EVENT_REMOVAL_CB:
      if (CARDSLOT_CARDTYPE(sc->sc_status) == CARDSLOT_STATUS_CARD_CB) {
	/* CardBus card has not been inserted. */
	if (CARDSLOT_WORK(sc->sc_status) == CARDSLOT_STATUS_WORKING) {
	  cardbus_detach_card(sc->sc_cb_softc);
	  CARDSLOT_SET_WORK(sc->sc_status, CARDSLOT_STATUS_NOTWORK);
	  CARDSLOT_SET_WORK(sc->sc_status, CARDSLOT_STATUS_CARD_NONE);
	}
	CARDSLOT_SET_CARDTYPE(sc->sc_status, CARDSLOT_STATUS_CARD_NONE);
      } else if (CARDSLOT_CARDTYPE(sc->sc_status) != CARDSLOT_STATUS_CARD_16) {
	/* Unknown card... */
	CARDSLOT_SET_CARDTYPE(sc->sc_status, CARDSLOT_STATUS_CARD_NONE);
      }
      CARDSLOT_SET_WORK(sc->sc_status, CARDSLOT_STATUS_NOTWORK);
      break;

    case CARDSLOT_EVENT_REMOVAL_16:
      DPRINTF(("%s: removal event\n", sc->sc_dev.dv_xname));
      if (CARDSLOT_CARDTYPE(sc->sc_status) != CARDSLOT_STATUS_CARD_16) {
	/* 16-bit card has not been inserted. */
	break;
      }
      if ((sc->sc_16_softc != NULL)
	  && (CARDSLOT_WORK(sc->sc_status) == CARDSLOT_STATUS_WORKING)) {
	struct pcmcia_softc *psc = sc->sc_16_softc;

	pcmcia_card_deactivate((struct device *)psc);
	pcmcia_chip_socket_disable(psc->pct, psc->pch);
	pcmcia_card_detach((struct device *)psc, DETACH_FORCE);
      }
      CARDSLOT_SET_CARDTYPE(sc->sc_status, CARDSLOT_STATUS_CARD_NONE);
      CARDSLOT_SET_WORK(sc->sc_status, CARDSLOT_STATUS_NOTWORK);
      break;

    default:
      panic("cardslot_event_thread: unknown event %d", ce->ce_type);
    }
    free(ce, M_TEMP);
  }

  sc->sc_event_thread = NULL;

  /* In case the parent device is waiting for us to exit. */
  wakeup(sc);

  kthread_exit(0);
}