boca.c

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    1 /*      $NetBSD: boca.c,v 1.41 2003/01/01 00:10:20 thorpej 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: boca.c,v 1.41 2003/01/01 00:10:20 thorpej Exp $");
   38 
   39 #include <sys/param.h>
   40 #include <sys/systm.h>
   41 #include <sys/device.h>
   42 #include <sys/termios.h>
   43 #include <sys/kernel.h>
   44 #include <sys/callout.h>
   45 
   46 #include <machine/bus.h>
   47 #include <machine/intr.h>
   48 
   49 #include <dev/ic/comreg.h>
   50 #include <dev/ic/comvar.h>
   51 
   52 #include <dev/isa/isavar.h>
   53 #include <dev/isa/com_multi.h>
   54 
   55 #define NSLAVES 8
   56 
   57 struct boca_softc {
   58         struct device sc_dev;
   59         void *sc_ih;
   60 
   61         bus_space_tag_t sc_iot;
   62         int sc_iobase;
   63 
   64         int sc_alive;                   /* mask of slave units attached */
   65         void *sc_slaves[NSLAVES];       /* com device unit numbers */
   66         bus_space_handle_t sc_slaveioh[NSLAVES];
   67         struct callout fixup;
   68 };
   69 
   70 int bocaprobe __P((struct device *, struct cfdata *, void *));
   71 void bocaattach __P((struct device *, struct device *, void *));
   72 int bocaintr __P((void *));
   73 void boca_fixup __P((void *));
   74 int bocaprint __P((void *, const char *));
   75 
   76 CFATTACH_DECL(boca, sizeof(struct boca_softc),
   77     bocaprobe, bocaattach, NULL, NULL);
   78 
   79 int
   80 bocaprobe(parent, self, aux)
   81         struct device *parent;
   82         struct cfdata *self;
   83         void *aux;
   84 {
   85         struct isa_attach_args *ia = aux;
   86         bus_space_tag_t iot = ia->ia_iot;
   87         bus_space_handle_t ioh;
   88         int i, iobase, rv = 1;
   89 
   90         /*
   91          * Do the normal com probe for the first UART and assume
   92          * its presence, and the ability to map the other UARTS,
   93          * means there is a multiport board there.
   94          * XXX Needs more robustness.
   95          */
   96 
   97         if (ia->ia_nio < 1)
   98                 return (0);
   99         if (ia->ia_nirq < 1)
  100                 return (0);
  101 
  102         if (ISA_DIRECT_CONFIG(ia))
  103                 return (0);
  104 
  105         /* Disallow wildcarded i/o address. */
  106         if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT)
  107                 return (0);
  108         if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT)
  109                 return (0);
  110 
  111         iobase = ia->ia_io[0].ir_addr;
  112 
  113         /* if the first port is in use as console, then it. */
  114         if (com_is_console(iot, iobase, 0))
  115                 goto checkmappings;
  116 
  117         if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
  118                 rv = 0;
  119                 goto out;
  120         }
  121         rv = comprobe1(iot, ioh);
  122         bus_space_unmap(iot, ioh, COM_NPORTS);
  123         if (rv == 0)
  124                 goto out;
  125 
  126 checkmappings:
  127         for (i = 1; i < NSLAVES; i++) {
  128                 iobase += COM_NPORTS;
  129 
  130                 if (com_is_console(iot, iobase, 0))
  131                         continue;
  132 
  133                 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
  134                         rv = 0;
  135                         goto out;
  136                 }
  137                 bus_space_unmap(iot, ioh, COM_NPORTS);
  138         }
  139 
  140 out:
  141         if (rv) {
  142                 ia->ia_nio = 1;
  143                 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS;
  144 
  145                 ia->ia_nirq = 1;
  146 
  147                 ia->ia_niomem = 0;
  148                 ia->ia_ndrq = 0;
  149         }
  150         return (rv);
  151 }
  152 
  153 int
  154 bocaprint(aux, pnp)
  155         void *aux;
  156         const char *pnp;
  157 {
  158         struct commulti_attach_args *ca = aux;
  159 
  160         if (pnp)
  161                 aprint_normal("com at %s", pnp);
  162         aprint_normal(" slave %d", ca->ca_slave);
  163         return (UNCONF);
  164 }
  165 
  166 void
  167 bocaattach(parent, self, aux)
  168         struct device *parent, *self;
  169         void *aux;
  170 {
  171         struct boca_softc *sc = (void *)self;
  172         struct isa_attach_args *ia = aux;
  173         struct commulti_attach_args ca;
  174         bus_space_tag_t iot = ia->ia_iot;
  175         int i, iobase;
  176 
  177         printf("\n");
  178 
  179         sc->sc_iot = ia->ia_iot;
  180         sc->sc_iobase = ia->ia_io[0].ir_addr;
  181 
  182         for (i = 0; i < NSLAVES; i++) {
  183                 iobase = sc->sc_iobase + i * COM_NPORTS;
  184                 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) &&
  185                     bus_space_map(iot, iobase, COM_NPORTS, 0,
  186                         &sc->sc_slaveioh[i])) {
  187                         printf("%s: can't map i/o space for slave %d\n",
  188                              sc->sc_dev.dv_xname, i);
  189                         return;
  190                 }
  191         }
  192 
  193         for (i = 0; i < NSLAVES; i++) {
  194 
  195                 ca.ca_slave = i;
  196                 ca.ca_iot = sc->sc_iot;
  197                 ca.ca_ioh = sc->sc_slaveioh[i];
  198                 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
  199                 ca.ca_noien = 0;
  200 
  201                 sc->sc_slaves[i] = config_found(self, &ca, bocaprint);
  202                 if (sc->sc_slaves[i] != NULL)
  203                         sc->sc_alive |= 1 << i;
  204         }
  205 
  206         sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
  207             IST_EDGE, IPL_SERIAL, bocaintr, sc);
  208         callout_init(&sc->fixup);
  209         callout_reset(&sc->fixup, hz/10, boca_fixup, sc);
  210 }
  211 
  212 int
  213 bocaintr(arg)
  214         void *arg;
  215 {
  216         struct boca_softc *sc = arg;
  217         bus_space_tag_t iot = sc->sc_iot;
  218         int alive = sc->sc_alive;
  219         int bits;
  220 
  221         bits = bus_space_read_1(iot, sc->sc_slaveioh[0], com_scratch) & alive;
  222         if (bits == 0)
  223                 return (0);
  224 
  225         for (;;) {
  226 #define TRY(n) \
  227                 if (bits & (1 << (n))) { \
  228                         if (comintr(sc->sc_slaves[n]) == 0) { \
  229                                 printf("%s: bogus intr for port %d\n", \
  230                                     sc->sc_dev.dv_xname, n); \
  231                         } \
  232                 }
  233                 TRY(0);
  234                 TRY(1);
  235                 TRY(2);
  236                 TRY(3);
  237                 TRY(4);
  238                 TRY(5);
  239                 TRY(6);
  240                 TRY(7);
  241 #undef TRY
  242                 bits = bus_space_read_1(iot, sc->sc_slaveioh[0],
  243                     com_scratch) & alive;
  244                 if (bits == 0) {
  245                         return (1);
  246                 }
  247         }
  248 }
  249 
  250 void
  251 boca_fixup(v)
  252         void *v;
  253 {
  254         struct boca_softc *sc = v;
  255         int alive = sc->sc_alive;
  256         int i, s;
  257 
  258         s = splserial();
  259 
  260         for (i = 0; i < 8; i++) {
  261                 if (alive & (1 << (i)))
  262                         comintr(sc->sc_slaves[i]);
  263         }
  264         callout_reset(&sc->fixup, hz/10, boca_fixup, sc);
  265         splx(s);
  266 }

Cache object: 11d41c1712c991aa3e3c552308c31560

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

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sys/dev/isa/boca.c