ioat66.c

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    1 /*      $NetBSD: ioat66.c,v 1.7 2003/01/06 13:05:14 wiz Exp $   */
    2 
    3 /*
    4  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
    5  * Copyright (c) 1995 Charles M. Hannum.  All rights reserved.
    6  *
    7  * This code is derived from public-domain software written by
    8  * Roland McGrath, and information provided by David Muir Sharnoff.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *      This product includes software developed by Charles M. Hannum.
   21  * 4. The name of the author may not be used to endorse or promote products
   22  *    derived from this software without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   25  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   26  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   27  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   28  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   29  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   30  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   31  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   32  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   33  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   34  */
   35 
   36 #include <sys/cdefs.h>
   37 __KERNEL_RCSID(0, "$NetBSD: ioat66.c,v 1.7 2003/01/06 13:05:14 wiz Exp $");
   38 
   39 #include <sys/param.h>
   40 #include <sys/systm.h>
   41 #include <sys/device.h>
   42 #include <sys/termios.h>
   43 
   44 #include <machine/bus.h>
   45 #include <machine/intr.h>
   46 
   47 #include <dev/ic/comreg.h>
   48 #include <dev/ic/comvar.h>
   49 
   50 #include <dev/isa/isavar.h>
   51 #include <dev/isa/com_multi.h>
   52 
   53 #define NSLAVES 6
   54 
   55 struct ioat66_softc {
   56         struct device sc_dev;
   57         void *sc_ih;
   58 
   59         bus_space_tag_t sc_iot;
   60         int sc_iobase;
   61 
   62         int sc_alive;                   /* mask of slave units attached */
   63         void *sc_slaves[NSLAVES];       /* com device unit numbers */
   64         bus_space_handle_t sc_slaveioh[NSLAVES];
   65         bus_space_handle_t sc_intmasq;
   66 };
   67 
   68 int ioatbases[NSLAVES]={0x220,0x228,0x240,0x248,0x260,0x268};
   69 #define IOAT66SHARED 0x208
   70 
   71 int ioat66probe __P((struct device *, struct cfdata *, void *));
   72 void ioat66attach __P((struct device *, struct device *, void *));
   73 int ioat66intr __P((void *));
   74 int ioat66print __P((void *, const char *));
   75 
   76 CFATTACH_DECL(ioat, sizeof(struct ioat_softc),
   77     ioat66probe, ioat66attach, NULL, NULL);
   78 
   79 int
   80 ioat66probe(parent, self, aux)
   81         struct device *parent;
   82         struct cfdata *self;
   83         void *aux;
   84 {
   85         struct isa_attach_args *ia = aux;
   86         int iobase = ia->ia_iobase;
   87         bus_space_tag_t iot = ia->ia_iot;
   88         bus_space_handle_t ioh;
   89         int i, rv = 1;
   90 
   91         /*
   92          * Do the normal com probe for the first UART and assume
   93          * its presence, and the ability to map the other UARTS,
   94          * means there is a multiport board there.
   95          * XXX Needs more robustness.
   96          */
   97 
   98         /* Disallow wildcarded i/o address. */
   99         if (ia->ia_iobase == ISACF_PORT_DEFAULT)
  100                 return (0);
  101 
  102         /* if the first port is in use as console, then it. */
  103         if (com_is_console(iot, iobase, 0))
  104                 goto checkmappings;
  105 
  106         if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
  107                 rv = 0;
  108                 goto out;
  109         }
  110         rv = comprobe1(iot, ioh);
  111         bus_space_unmap(iot, ioh, COM_NPORTS);
  112         if (rv == 0)
  113                 goto out;
  114 
  115 checkmappings:
  116         for (i = 1; i < NSLAVES; i++) {
  117                 iobase = ioatbases[i];
  118 
  119                 if (com_is_console(iot, iobase, 0))
  120                         continue;
  121 
  122                 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
  123                         rv = 0;
  124                         goto out;
  125                 }
  126                 bus_space_unmap(iot, ioh, COM_NPORTS);
  127         }
  128 
  129 out:
  130         if (rv)
  131                 ia->ia_iosize = NSLAVES * COM_NPORTS;
  132         return (rv);
  133 }
  134 
  135 int
  136 ioat66print(aux, pnp)
  137         void *aux;
  138         const char *pnp;
  139 {
  140         struct commulti_attach_args *ca = aux;
  141 
  142         if (pnp)
  143                 aprint_normal("com at %s", pnp);
  144         aprint_normal(" slave %d", ca->ca_slave);
  145         return (UNCONF);
  146 }
  147 
  148 void
  149 ioat66attach(parent, self, aux)
  150         struct device *parent, *self;
  151         void *aux;
  152 {
  153         struct ioat66_softc *sc = (void *)self;
  154         struct isa_attach_args *ia = aux;
  155         struct commulti_attach_args ca;
  156         bus_space_tag_t iot = ia->ia_iot;
  157         int i, iobase;
  158 
  159         printf("\n");
  160 
  161         sc->sc_iot = ia->ia_iot;
  162         sc->sc_iobase = ia->ia_iobase;
  163 
  164         for (i = 0; i < NSLAVES; i++) {
  165                 iobase = ioatbases[i];
  166                 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) &&
  167                     bus_space_map(iot, iobase, COM_NPORTS, 0,
  168                         &sc->sc_slaveioh[i])) {
  169                         printf("%s: can't map i/o space for slave %d\n",
  170                              sc->sc_dev.dv_xname, i);
  171                         return;
  172                 }
  173         }
  174 
  175         if(bus_space_map(iot, IOAT66SHARED, 1, 0, &sc->sc_intmasq)) {
  176           printf("%s: can't map shared interrupt mask\n", 
  177                  sc->sc_dev.dv_xname);
  178           return;
  179         }
  180 
  181         for (i = 0; i < NSLAVES; i++) {
  182 
  183                 ca.ca_slave = i;
  184                 ca.ca_iot = sc->sc_iot;
  185                 ca.ca_ioh = sc->sc_slaveioh[i];
  186                 ca.ca_iobase = ioatbases[i];
  187                 ca.ca_noien = 0;
  188 
  189                 sc->sc_slaves[i] = config_found(self, &ca, ioat66print);
  190                 if (sc->sc_slaves[i] != NULL)
  191                         sc->sc_alive |= 1 << i;
  192         }
  193 
  194         sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
  195             IPL_SERIAL, ioat66intr, sc);
  196 }
  197 
  198 int
  199 ioat66intr(arg)
  200         void *arg;
  201 {
  202         struct ioat66_softc *sc = arg;
  203         bus_space_tag_t iot = sc->sc_iot;
  204         int alive = sc->sc_alive;
  205         int bits;
  206 
  207         bits = bus_space_read_1(iot, sc->sc_intmasq, 0) & alive;
  208         if (bits == 0)
  209                 return (0);
  210 
  211         for (;;) {
  212 #define TRY(n) \
  213                 if (bits & (1 << (n))) \
  214                         comintr(sc->sc_slaves[n]);
  215                 TRY(0);
  216                 TRY(1);
  217                 TRY(2);
  218                 TRY(3);
  219                 TRY(4);
  220                 TRY(5);
  221 #undef TRY
  222                 bits = bus_space_read_1(iot, sc->sc_intmasq, 0) & alive;
  223                 if (bits == 0)
  224                         return (1);
  225         }
  226 }

Cache object: de1947354be1dee31acc0d1183022b43

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FreeBSD/Linux Kernel Cross Reference sys/dev/isa/ioat66.c

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sys/dev/isa/ioat66.c