addcom_isa.c

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    1 /*      $OpenBSD: addcom_isa.c,v 1.7 2022/04/06 18:59:28 naddy Exp $    */
    2 /*      $NetBSD: addcom_isa.c,v 1.2 2000/04/21 20:13:41 explorer Exp $  */
    3 
    4 /*
    5  * Copyright (c) 2000 Michael Graff.  All rights reserved.
    6  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
    7  * Copyright (c) 1995 Charles M. Hannum.  All rights reserved.
    8  *
    9  * This code is derived from public-domain software written by
   10  * Roland McGrath, and information provided by David Muir Sharnoff.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. All advertising materials mentioning features or use of this software
   21  *    must display the following acknowledgement:
   22  *      This product includes software developed by Charles M. Hannum.
   23  * 4. The name of the author may not be used to endorse or promote products
   24  *    derived from this software without specific prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   27  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   28  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   29  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   30  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   31  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   32  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   35  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   36  */
   37 
   38 /*
   39  * This code was written and tested with the Addonics FlexPort 8S.
   40  * It has 8 ports, using 16650-compatible chips, sharing a single
   41  * interrupt.
   42  *
   43  * An interrupt status register exists at 0x240, according to the
   44  * skimpy documentation supplied.  It doesn't change depending on
   45  * io base address, so only one of these cards can ever be used at
   46  * a time.
   47  *
   48  * NOTE: the status register does not appear to work as advertised,
   49  * so instead we depend on the slave devices being intelligent enough
   50  * to determine whether they interrupted or not.
   51  *
   52  * This card is different from the boca or other cards in that ports
   53  * 0..5 are from addresses 0x108..0x137, and 6..7 are from 0x200..0x20f,
   54  * making a gap that the other cards do not have.
   55  *
   56  * The addresses which are documented are 0x108, 0x1108, 0x1d08, and
   57  * 0x8508, for the base (port 0) address.
   58  *
   59  * --Michael <explorer@netbsd.org> -- April 21, 2000
   60  */
   61 
   62 #include <sys/param.h>
   63 #include <sys/systm.h>
   64 #include <sys/device.h>
   65 #include <sys/termios.h>
   66 
   67 #include <machine/bus.h>
   68 #include <machine/intr.h>
   69 
   70 #include <dev/ic/comreg.h>
   71 #include <dev/ic/comvar.h>
   72 
   73 #include <dev/isa/isavar.h>
   74 
   75 #define NSLAVES 8
   76 
   77 /*
   78  * Grr.  This card always uses 0x420 for the status register, regardless
   79  * of io base address.
   80  */
   81 #define STATUS_IOADDR   0x420
   82 #define STATUS_SIZE     8               /* May be bogus... */
   83 
   84 struct addcom_softc {
   85         struct device sc_dev;
   86         void *sc_ih;
   87 
   88         bus_space_tag_t sc_iot;
   89         bus_addr_t sc_iobase;
   90 
   91         int sc_alive[NSLAVES];
   92         void *sc_slaves[NSLAVES];       /* com device unit numbers */
   93         bus_space_handle_t sc_slaveioh[NSLAVES];
   94         bus_space_handle_t sc_statusioh;
   95 };
   96 
   97 #define SLAVE_IOBASE_OFFSET 0x108
   98 static int slave_iobases[8] = {
   99         0x108,  /* port 0, base port */
  100         0x110,
  101         0x118,
  102         0x120,
  103         0x128,
  104         0x130,
  105         0x200,  /* port 7, note address skip... */
  106         0x208
  107 };
  108 
  109 int addcomprobe(struct device *, void *, void *);
  110 void addcomattach(struct device *, struct device *, void *);
  111 int addcomintr(void *);
  112 int addcomprint(void *, const char *);
  113 
  114 const struct cfattach addcom_isa_ca = {
  115         sizeof(struct addcom_softc), addcomprobe, addcomattach,
  116 };
  117 
  118 struct cfdriver addcom_cd = {
  119         NULL, "addcom", DV_TTY
  120 };
  121 
  122 int
  123 addcomprobe(parent, self, aux)
  124         struct device *parent;
  125         void *self, *aux;
  126 {
  127         struct isa_attach_args *ia = aux;
  128         int iobase = ia->ia_iobase;
  129         bus_space_tag_t iot = ia->ia_iot;
  130         bus_space_handle_t ioh;
  131         int i, rv = 1;
  132 
  133         /*
  134          * Do the normal com probe for the first UART and assume
  135          * its presence, and the ability to map the other UARTS,
  136          * means there is a multiport board there.
  137          * XXX Needs more robustness.
  138          */
  139 
  140         /* Disallow wildcarded i/o address. */
  141         if (ia->ia_iobase == -1 /* ISACF_PORT_DEFAULT */)
  142                 return (0);
  143 
  144         /* if the first port is in use as console, then it. */
  145         if (iobase == comconsaddr && !comconsattached)
  146                 goto checkmappings;
  147 
  148         if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
  149                 rv = 0;
  150                 goto out;
  151         }
  152         rv = comprobe1(iot, ioh);
  153         bus_space_unmap(iot, ioh, COM_NPORTS);
  154         if (rv == 0)
  155                 goto out;
  156 
  157 checkmappings:
  158         for (i = 1; i < NSLAVES; i++) {
  159                 iobase += slave_iobases[i] - slave_iobases[i - 1];
  160 
  161                 if (iobase == comconsaddr && !comconsattached)
  162                         continue;
  163 
  164                 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
  165                         rv = 0;
  166                         goto out;
  167                 }
  168                 bus_space_unmap(iot, ioh, COM_NPORTS);
  169         }
  170 
  171 out:
  172         if (rv)
  173                 ia->ia_iosize = NSLAVES * COM_NPORTS;
  174         return (rv);
  175 }
  176 
  177 int
  178 addcomprint(aux, pnp)
  179         void *aux;
  180         const char *pnp;
  181 {
  182         struct commulti_attach_args *ca = aux;
  183 
  184         if (pnp)
  185                 printf("com at %s", pnp);
  186         printf(" slave %d", ca->ca_slave);
  187         return (UNCONF);
  188 }
  189 
  190 void
  191 addcomattach(parent, self, aux)
  192         struct device *parent, *self;
  193         void *aux;
  194 {
  195         struct addcom_softc *sc = (void *)self;
  196         struct isa_attach_args *ia = aux;
  197         struct commulti_attach_args ca;
  198         bus_space_tag_t iot = ia->ia_iot;
  199         bus_addr_t iobase;
  200         int i;
  201 
  202         sc->sc_iot = ia->ia_iot;
  203         sc->sc_iobase = ia->ia_iobase;
  204 
  205         /* Disallow wildcard interrupt. */
  206         if (ia->ia_irq == IRQUNK) {
  207                 printf(": wildcard interrupt not supported\n");
  208                 return;
  209         }
  210 
  211         sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
  212             IPL_TTY, addcomintr, sc, sc->sc_dev.dv_xname);
  213         if (sc->sc_ih == NULL) {
  214                 printf(": can't establish interrupt\n");
  215                 return;
  216         }
  217 
  218         if (bus_space_map(iot, STATUS_IOADDR, STATUS_SIZE,
  219             0, &sc->sc_statusioh)) {
  220                 printf(": can't map status space\n");
  221                 return;
  222         }
  223 
  224         for (i = 0; i < NSLAVES; i++) {
  225                 iobase = sc->sc_iobase
  226                     + slave_iobases[i]
  227                     - SLAVE_IOBASE_OFFSET;
  228 
  229                 if ((!(iobase == comconsaddr && !comconsattached)) &&
  230                     bus_space_map(iot, iobase, COM_NPORTS, 0,
  231                         &sc->sc_slaveioh[i])) {
  232                         printf(": can't map i/o space for slave %d\n", i);
  233                         return;
  234                 }
  235         }
  236 
  237         printf("\n");
  238 
  239         for (i = 0; i < NSLAVES; i++) {
  240                 ca.ca_slave = i;
  241                 ca.ca_iot = sc->sc_iot;
  242                 ca.ca_ioh = sc->sc_slaveioh[i];
  243                 ca.ca_iobase = sc->sc_iobase
  244                     + slave_iobases[i]
  245                     - SLAVE_IOBASE_OFFSET;
  246                 ca.ca_noien = 0;
  247 
  248                 sc->sc_slaves[i] = config_found(self, &ca, addcomprint);
  249                 if (sc->sc_slaves[i] != NULL)
  250                         sc->sc_alive[i] = 1;
  251         }
  252 
  253 }
  254 
  255 int
  256 addcomintr(arg)
  257         void *arg;
  258 {
  259         struct addcom_softc *sc = arg;
  260         int intrd, r = 0, i;
  261 
  262         do {
  263                 intrd = 0;
  264                 for (i = 0; i < NSLAVES; i++)
  265                         if (sc->sc_alive[i] && comintr(sc->sc_slaves[i])) {
  266                                 r = 1;
  267                                 intrd = 1;
  268                         }
  269         } while (intrd);
  270 
  271         return (r);
  272 }

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

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