eisa.c

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    1 /*      $OpenBSD: eisa.c,v 1.15 2022/04/06 18:59:28 naddy Exp $ */
    2 /*      $NetBSD: eisa.c,v 1.15 1996/10/21 22:31:01 thorpej Exp $        */
    3 
    4 /*
    5  * Copyright (c) 1995, 1996 Christopher G. Demetriou
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by Christopher G. Demetriou
   19  *      for the NetBSD Project.
   20  * 4. The name of the author may not be used to endorse or promote products
   21  *    derived from this software without specific prior written permission
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   33  */
   34 
   35 /*
   36  * EISA Bus device
   37  *
   38  * Makes sure an EISA bus is present, and finds and attaches devices
   39  * living on it.
   40  */
   41 
   42 #include <sys/param.h>
   43 #include <sys/systm.h>
   44 #include <sys/device.h>
   45 
   46 #include <machine/bus.h>
   47 
   48 #include <dev/eisa/eisareg.h>
   49 #include <dev/eisa/eisavar.h>
   50 #include <dev/eisa/eisadevs.h>
   51 
   52 int     eisamatch(struct device *, void *, void *);
   53 void    eisaattach(struct device *, struct device *, void *);
   54 
   55 const struct cfattach eisa_ca = {
   56         sizeof(struct device), eisamatch, eisaattach
   57 };
   58 
   59 struct cfdriver eisa_cd = {
   60         NULL, "eisa", DV_DULL
   61 };
   62 
   63 int     eisasubmatch(struct device *, void *, void *);
   64 int     eisaprint(void *, const char *);
   65 void    eisa_devinfo(const char *, char *, size_t);
   66 
   67 int
   68 eisamatch(struct device *parent, void *match, void *aux)
   69 {
   70         struct cfdata *cf = match;
   71         struct eisabus_attach_args *eba = aux;
   72 
   73         if (strcmp(eba->eba_busname, cf->cf_driver->cd_name))
   74                 return (0);
   75 
   76         /* XXX check other indicators */
   77 
   78         return (1);
   79 }
   80 
   81 int
   82 eisaprint(void *aux, const char *pnp)
   83 {
   84         register struct eisa_attach_args *ea = aux;
   85         char devinfo[256]; 
   86 
   87         if (pnp) {
   88                 eisa_devinfo(ea->ea_idstring, devinfo, sizeof devinfo);
   89                 printf("%s at %s", devinfo, pnp);
   90         }
   91         printf(" slot %d", ea->ea_slot);
   92         return (UNCONF);
   93 }
   94 
   95 int
   96 eisasubmatch(struct device *parent, void *match, void *aux)
   97 {
   98         struct cfdata *cf = match;
   99         struct eisa_attach_args *ea = aux;
  100 
  101         if (cf->eisacf_slot != EISA_UNKNOWN_SLOT &&
  102             cf->eisacf_slot != ea->ea_slot)
  103                 return 0;
  104         return ((*cf->cf_attach->ca_match)(parent, match, aux));
  105 }
  106 
  107 void
  108 eisaattach(struct device *parent, struct device *self, void *aux)
  109 {
  110         struct eisabus_attach_args *eba = aux;
  111         bus_space_tag_t iot, memt;
  112         eisa_chipset_tag_t ec;
  113         int slot, maxnslots;
  114 
  115         eisa_attach_hook(parent, self, eba);
  116         printf("\n");
  117 
  118         iot = eba->eba_iot;
  119         memt = eba->eba_memt;
  120         ec = eba->eba_ec;
  121 
  122         /*
  123          * Search for and attach subdevices.
  124          *
  125          * Slot 0 is the "motherboard" slot, and the code attaching
  126          * the EISA bus should have already attached an ISA bus there.
  127          */
  128         maxnslots = eisa_maxslots(ec);
  129         for (slot = 1; slot < maxnslots; slot++) {
  130                 struct eisa_attach_args ea;
  131                 u_int slotaddr;
  132                 bus_space_handle_t slotioh;
  133                 int i;
  134 
  135                 ea.ea_dmat = eba->eba_dmat;
  136                 ea.ea_iot = iot;
  137                 ea.ea_memt = memt;
  138                 ea.ea_ec = ec;
  139                 ea.ea_slot = slot;
  140                 slotaddr = EISA_SLOT_ADDR(slot);
  141 
  142                 /*
  143                  * Get a mapping for the whole slot-specific address
  144                  * space.  If we can't, assume nothing's there but warn
  145                  * about it.
  146                  */
  147                 if (bus_space_map(iot, slotaddr, EISA_SLOT_SIZE, 0, &slotioh)) {
  148                         printf("%s: can't map i/o space for slot %d\n",
  149                             self->dv_xname, slot);
  150                         continue;
  151                 }
  152 
  153                 /* Get the vendor ID bytes */
  154                 for (i = 0; i < EISA_NVIDREGS; i++) {
  155 #ifdef EISA_SLOTOFF_PRIMING
  156                         bus_space_write_1(iot, slotioh,
  157                             EISA_SLOTOFF_PRIMING, EISA_PRIMING_VID(i));
  158 #endif
  159                         ea.ea_vid[i] = bus_space_read_1(iot, slotioh,
  160                             EISA_SLOTOFF_VID + i);
  161                 }
  162 
  163                 /* Check for device existence */
  164                 if (EISA_VENDID_NODEV(ea.ea_vid)) {
  165 #if 0
  166                         printf("no device at %s slot %d\n", self->dv_xname,
  167                             slot);
  168                         printf("\t(0x%x, 0x%x)\n", ea.ea_vid[0],
  169                             ea.ea_vid[1]);
  170 #endif
  171                         bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
  172                         continue;
  173                 }
  174 
  175                 /* And check that the firmware didn't biff something badly */
  176                 if (EISA_VENDID_IDDELAY(ea.ea_vid)) {
  177                         printf("%s slot %d not configured by BIOS?\n",
  178                             self->dv_xname, slot);
  179                         bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
  180                         continue;
  181                 }
  182 
  183                 /* Get the product ID bytes */
  184                 for (i = 0; i < EISA_NPIDREGS; i++) {
  185 #ifdef EISA_SLOTOFF_PRIMING
  186                         bus_space_write_1(iot, slotioh,
  187                             EISA_SLOTOFF_PRIMING, EISA_PRIMING_PID(i));
  188 #endif
  189                         ea.ea_pid[i] = bus_space_read_1(iot, slotioh,
  190                             EISA_SLOTOFF_PID + i);
  191                 }
  192 
  193                 /* Create the ID string from the vendor and product IDs */
  194                 ea.ea_idstring[0] = EISA_VENDID_0(ea.ea_vid);
  195                 ea.ea_idstring[1] = EISA_VENDID_1(ea.ea_vid);
  196                 ea.ea_idstring[2] = EISA_VENDID_2(ea.ea_vid);
  197                 ea.ea_idstring[3] = EISA_PRODID_0(ea.ea_pid);
  198                 ea.ea_idstring[4] = EISA_PRODID_1(ea.ea_pid);
  199                 ea.ea_idstring[5] = EISA_PRODID_2(ea.ea_pid);
  200                 ea.ea_idstring[6] = EISA_PRODID_3(ea.ea_pid);
  201                 ea.ea_idstring[7] = '\0';               /* sanity */
  202 
  203                 /* We no longer need the I/O handle; free it. */
  204                 bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
  205 
  206                 /* Attach matching device. */
  207                 config_found_sm(self, &ea, eisaprint, eisasubmatch);
  208         }
  209 }
  210 
  211 #ifdef EISAVERBOSE
  212 /*
  213  * Descriptions of known vendors and devices ("products").
  214  */
  215 struct eisa_knowndev {
  216         int     flags;
  217         char    id[8];
  218         const char *name;
  219 };
  220 #define EISA_KNOWNDEV_NOPROD    0x01            /* match on vendor only */
  221 
  222 #include <dev/eisa/eisadevs_data.h>
  223 #endif /* EISAVERBOSE */
  224 
  225 void
  226 eisa_devinfo(const char *id, char *cp, size_t cp_len)
  227 {
  228         const char *name;
  229         int onlyvendor;
  230 #ifdef EISAVERBOSE
  231         const struct eisa_knowndev *edp;
  232         int match;
  233         const char *unmatched = "unknown ";
  234 #else
  235         const char *unmatched = "";
  236 #endif
  237 
  238         onlyvendor = 0;
  239         name = NULL;
  240 
  241 #ifdef EISAVERBOSE
  242         /* find the device in the table, if possible. */
  243         edp = eisa_knowndevs;
  244         while (edp->name != NULL) {
  245                 /* check this entry for a match */
  246                 if ((edp->flags & EISA_KNOWNDEV_NOPROD) != 0)
  247                         match = !strncmp(edp->id, id, 3);
  248                 else
  249                         match = !strcmp(edp->id, id);
  250                 if (match) {
  251                         name = edp->name;
  252                         onlyvendor = (edp->flags & EISA_KNOWNDEV_NOPROD) != 0;
  253                         break;
  254                 }
  255                 edp++;
  256         }
  257 #endif
  258 
  259         if (name == NULL)
  260                 snprintf(cp, cp_len, "%sdevice %s", unmatched, id);
  261         else if (onlyvendor)                    /* never if not EISAVERBOSE */
  262                 snprintf(cp, cp_len, "unknown %s device %s", name, id);
  263         else
  264                 snprintf(cp, cp_len, "%s", name);
  265 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/eisa/eisa.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/eisa/eisa.c