The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      $NetBSD: eisa.c,v 1.41 2006/11/16 01:32:50 christos Exp $       */
    2 
    3 /*
    4  * Copyright (c) 1995, 1996 Christopher G. Demetriou
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *      This product includes software developed by Christopher G. Demetriou
   18  *      for the NetBSD Project.
   19  * 4. The name of the author may not be used to endorse or promote products
   20  *    derived from this software without specific prior written permission
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   32  */
   33 
   34 /*
   35  * EISA Bus device
   36  *
   37  * Makes sure an EISA bus is present, and finds and attaches devices
   38  * living on it.
   39  */
   40 
   41 #include <sys/cdefs.h>
   42 __KERNEL_RCSID(0, "$NetBSD: eisa.c,v 1.41 2006/11/16 01:32:50 christos Exp $");
   43 
   44 #include "opt_eisaverbose.h"
   45 
   46 #include <sys/param.h>
   47 #include <sys/systm.h>
   48 #include <sys/device.h>
   49 
   50 #include <machine/bus.h>
   51 
   52 #include <dev/eisa/eisareg.h>
   53 #include <dev/eisa/eisavar.h>
   54 #include <dev/eisa/eisadevs.h>
   55 
   56 #include "locators.h"
   57 
   58 static int      eisamatch(struct device *, struct cfdata *, void *);
   59 static void     eisaattach(struct device *, struct device *, void *);
   60 
   61 CFATTACH_DECL(eisa, sizeof(struct device),
   62     eisamatch, eisaattach, NULL, NULL);
   63 
   64 static int      eisaprint(void *, const char *);
   65 static void     eisa_devinfo(const char *, char *, size_t);
   66 
   67 static int
   68 eisamatch(struct device *parent, struct cfdata *cf,
   69     void *aux)
   70 {
   71         /* XXX check other indicators */
   72 
   73         return (1);
   74 }
   75 
   76 static int
   77 eisaprint(void *aux, const char *pnp)
   78 {
   79         struct eisa_attach_args *ea = aux;
   80         char devinfo[256];
   81 
   82         if (pnp) {
   83                 eisa_devinfo(ea->ea_idstring, devinfo, sizeof(devinfo));
   84                 aprint_normal("%s at %s", devinfo, pnp);
   85         }
   86         aprint_normal(" slot %d", ea->ea_slot);
   87         return (UNCONF);
   88 }
   89 
   90 static void
   91 eisaattach(struct device *parent, struct device *self, void *aux)
   92 {
   93         struct eisabus_attach_args *eba = aux;
   94         bus_space_tag_t iot, memt;
   95         bus_dma_tag_t dmat;
   96         eisa_chipset_tag_t ec;
   97         int slot, maxnslots;
   98 
   99         eisa_attach_hook(parent, self, eba);
  100         printf("\n");
  101 
  102         iot = eba->eba_iot;
  103         memt = eba->eba_memt;
  104         ec = eba->eba_ec;
  105         dmat = eba->eba_dmat;
  106 
  107         /*
  108          * Search for and attach subdevices.
  109          *
  110          * Slot 0 is the "motherboard" slot, and the code attaching
  111          * the EISA bus should have already attached an ISA bus there.
  112          */
  113         maxnslots = eisa_maxslots(ec);
  114         for (slot = 1; slot < maxnslots; slot++) {
  115                 struct eisa_attach_args ea;
  116                 u_int slotaddr;
  117                 bus_space_handle_t slotioh;
  118                 int i;
  119                 int locs[EISACF_NLOCS];
  120 
  121                 ea.ea_iot = iot;
  122                 ea.ea_memt = memt;
  123                 ea.ea_ec = ec;
  124                 ea.ea_dmat = dmat;
  125                 ea.ea_slot = slot;
  126                 slotaddr = EISA_SLOT_ADDR(slot);
  127 
  128                 /*
  129                  * Get a mapping for the whole slot-specific address
  130                  * space.  If we can't, assume nothing's there but warn
  131                  * about it.
  132                  */
  133                 if (bus_space_map(iot, slotaddr, EISA_SLOT_SIZE, 0, &slotioh)) {
  134                         printf("%s: can't map I/O space for slot %d\n",
  135                             self->dv_xname, slot);
  136                         continue;
  137                 }
  138 
  139                 /* Get the vendor ID bytes */
  140                 for (i = 0; i < EISA_NVIDREGS; i++)
  141                         ea.ea_vid[i] = bus_space_read_1(iot, slotioh,
  142                             EISA_SLOTOFF_VID + i);
  143 
  144                 /* Check for device existence */
  145                 if (EISA_VENDID_NODEV(ea.ea_vid)) {
  146 #if 0
  147                         printf("no device at %s slot %d\n", self->dv_xname,
  148                             slot);
  149                         printf("\t(0x%x, 0x%x)\n", ea.ea_vid[0],
  150                             ea.ea_vid[1]);
  151 #endif
  152                         bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
  153                         continue;
  154                 }
  155 
  156                 /* And check that the firmware didn't biff something badly */
  157                 if (EISA_VENDID_IDDELAY(ea.ea_vid)) {
  158                         printf("%s slot %d not configured by BIOS?\n",
  159                             self->dv_xname, slot);
  160                         bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
  161                         continue;
  162                 }
  163 
  164                 /* Get the product ID bytes */
  165                 for (i = 0; i < EISA_NPIDREGS; i++)
  166                         ea.ea_pid[i] = bus_space_read_1(iot, slotioh,
  167                             EISA_SLOTOFF_PID + i);
  168 
  169                 /* Create the ID string from the vendor and product IDs */
  170                 ea.ea_idstring[0] = EISA_VENDID_0(ea.ea_vid);
  171                 ea.ea_idstring[1] = EISA_VENDID_1(ea.ea_vid);
  172                 ea.ea_idstring[2] = EISA_VENDID_2(ea.ea_vid);
  173                 ea.ea_idstring[3] = EISA_PRODID_0(ea.ea_pid);
  174                 ea.ea_idstring[4] = EISA_PRODID_1(ea.ea_pid);
  175                 ea.ea_idstring[5] = EISA_PRODID_2(ea.ea_pid);
  176                 ea.ea_idstring[6] = EISA_PRODID_3(ea.ea_pid);
  177                 ea.ea_idstring[7] = '\0';               /* sanity */
  178 
  179                 /* We no longer need the I/O handle; free it. */
  180                 bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
  181 
  182                 locs[EISACF_SLOT] = slot;
  183 
  184                 /* Attach matching device. */
  185                 config_found_sm_loc(self, "eisa", locs, &ea,
  186                                     eisaprint, config_stdsubmatch);
  187         }
  188 }
  189 
  190 #ifdef EISAVERBOSE
  191 /*
  192  * Descriptions of of known vendors and devices ("products").
  193  */
  194 struct eisa_knowndev {
  195         int     flags;
  196         const char *id, *name;
  197 };
  198 #define EISA_KNOWNDEV_NOPROD    0x01            /* match on vendor only */
  199 
  200 #include <dev/eisa/eisadevs_data.h>
  201 #endif  /* EISAVEBSOSE */
  202 
  203 void
  204 eisa_devinfo(const char *id, char *cp, size_t l)
  205 {
  206 #ifdef EISAVERBOSE
  207         const char *name;
  208         const struct eisa_knowndev *edp;
  209         int match, onlyvendor;
  210 
  211         onlyvendor = 0;
  212         name = NULL;
  213 
  214         /* find the device in the table, if possible. */
  215         for (edp = eisa_knowndevs; edp->id != NULL; edp++) {
  216                 if ((edp->flags & EISA_KNOWNDEV_NOPROD) != 0)
  217                         match = (strncmp(edp->id, id, 3) == 0);
  218                 else
  219                         match = (strcmp(edp->id, id) == 0);
  220                 if (match) {
  221                         name = edp->name;
  222                         onlyvendor = (edp->flags & EISA_KNOWNDEV_NOPROD) != 0;
  223                         break;
  224                 }
  225         }
  226 
  227         if (name == NULL)
  228                 snprintf(cp, l, "unknown device %s", id);
  229         else if (onlyvendor)
  230                 snprintf(cp, l, "unknown %s device %s", name, id);
  231         else
  232                 snprintf(cp, l, "%s", name);
  233 #else   /* EISAVERBOSE */
  234 
  235         snprintf(cp, l, "device %s", id);
  236 #endif  /* EISAVERBOSE */
  237 }

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