eisa.c

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    1 /*      $NetBSD: eisa.c,v 1.36 2005/02/27 00:26:59 perry 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 1.36 2005/02/27 00:26:59 perry 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      eisasubmatch(struct device *, struct cfdata *,
   65                              const locdesc_t *, void *);
   66 static int      eisaprint(void *, const char *);
   67 static void     eisa_devinfo(const char *, char *, size_t);
   68 
   69 static int
   70 eisamatch(struct device *parent, struct cfdata *cf, void *aux)
   71 {
   72         /* XXX check other indicators */
   73 
   74         return (1);
   75 }
   76 
   77 static int
   78 eisaprint(void *aux, const char *pnp)
   79 {
   80         struct eisa_attach_args *ea = aux;
   81         char devinfo[256];
   82 
   83         if (pnp) {
   84                 eisa_devinfo(ea->ea_idstring, devinfo, sizeof(devinfo));
   85                 aprint_normal("%s at %s", devinfo, pnp);
   86         }
   87         aprint_normal(" slot %d", ea->ea_slot);
   88         return (UNCONF);
   89 }
   90 
   91 static int
   92 eisasubmatch(struct device *parent, struct cfdata *cf,
   93              const locdesc_t * ldesc, void *aux)
   94 {
   95 
   96         if (cf->cf_loc[EISACF_SLOT] != EISACF_SLOT_DEFAULT &&
   97             cf->cf_loc[EISACF_SLOT] != ldesc->locs[EISACF_SLOT])
   98                 return (0);
   99         return (config_match(parent, cf, aux));
  100 }
  101 
  102 static void
  103 eisaattach(struct device *parent, struct device *self, void *aux)
  104 {
  105         struct eisabus_attach_args *eba = aux;
  106         bus_space_tag_t iot, memt;
  107         bus_dma_tag_t dmat;
  108         eisa_chipset_tag_t ec;
  109         int slot, maxnslots;
  110 
  111         eisa_attach_hook(parent, self, eba);
  112         printf("\n");
  113 
  114         iot = eba->eba_iot;
  115         memt = eba->eba_memt;
  116         ec = eba->eba_ec;
  117         dmat = eba->eba_dmat;
  118 
  119         /*
  120          * Search for and attach subdevices.
  121          *
  122          * Slot 0 is the "motherboard" slot, and the code attaching
  123          * the EISA bus should have already attached an ISA bus there.
  124          */
  125         maxnslots = eisa_maxslots(ec);
  126         for (slot = 1; slot < maxnslots; slot++) {
  127                 struct eisa_attach_args ea;
  128                 u_int slotaddr;
  129                 bus_space_handle_t slotioh;
  130                 int i;
  131                 int help[2];
  132                 locdesc_t *ldesc = (void *)help; /* XXX */
  133 
  134                 ea.ea_iot = iot;
  135                 ea.ea_memt = memt;
  136                 ea.ea_ec = ec;
  137                 ea.ea_dmat = dmat;
  138                 ea.ea_slot = slot;
  139                 slotaddr = EISA_SLOT_ADDR(slot);
  140 
  141                 /*
  142                  * Get a mapping for the whole slot-specific address
  143                  * space.  If we can't, assume nothing's there but warn
  144                  * about it.
  145                  */
  146                 if (bus_space_map(iot, slotaddr, EISA_SLOT_SIZE, 0, &slotioh)) {
  147                         printf("%s: can't map I/O space for slot %d\n",
  148                             self->dv_xname, slot);
  149                         continue;
  150                 }
  151 
  152                 /* Get the vendor ID bytes */
  153                 for (i = 0; i < EISA_NVIDREGS; i++)
  154                         ea.ea_vid[i] = bus_space_read_1(iot, slotioh,
  155                             EISA_SLOTOFF_VID + i);
  156 
  157                 /* Check for device existence */
  158                 if (EISA_VENDID_NODEV(ea.ea_vid)) {
  159 #if 0
  160                         printf("no device at %s slot %d\n", self->dv_xname,
  161                             slot);
  162                         printf("\t(0x%x, 0x%x)\n", ea.ea_vid[0],
  163                             ea.ea_vid[1]);
  164 #endif
  165                         bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
  166                         continue;
  167                 }
  168 
  169                 /* And check that the firmware didn't biff something badly */
  170                 if (EISA_VENDID_IDDELAY(ea.ea_vid)) {
  171                         printf("%s slot %d not configured by BIOS?\n",
  172                             self->dv_xname, slot);
  173                         bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
  174                         continue;
  175                 }
  176 
  177                 /* Get the product ID bytes */
  178                 for (i = 0; i < EISA_NPIDREGS; i++)
  179                         ea.ea_pid[i] = bus_space_read_1(iot, slotioh,
  180                             EISA_SLOTOFF_PID + i);
  181 
  182                 /* Create the ID string from the vendor and product IDs */
  183                 ea.ea_idstring[0] = EISA_VENDID_0(ea.ea_vid);
  184                 ea.ea_idstring[1] = EISA_VENDID_1(ea.ea_vid);
  185                 ea.ea_idstring[2] = EISA_VENDID_2(ea.ea_vid);
  186                 ea.ea_idstring[3] = EISA_PRODID_0(ea.ea_pid);
  187                 ea.ea_idstring[4] = EISA_PRODID_1(ea.ea_pid);
  188                 ea.ea_idstring[5] = EISA_PRODID_2(ea.ea_pid);
  189                 ea.ea_idstring[6] = EISA_PRODID_3(ea.ea_pid);
  190                 ea.ea_idstring[7] = '\0';               /* sanity */
  191 
  192                 /* We no longer need the I/O handle; free it. */
  193                 bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
  194 
  195                 ldesc->len = 1;
  196                 ldesc->locs[EISACF_SLOT] = slot;
  197 
  198                 /* Attach matching device. */
  199                 config_found_sm_loc(self, "eisa", ldesc, &ea,
  200                                     eisaprint, eisasubmatch);
  201         }
  202 }
  203 
  204 #ifdef EISAVERBOSE
  205 /*
  206  * Descriptions of of known vendors and devices ("products").
  207  */
  208 struct eisa_knowndev {
  209         int     flags;
  210         const char *id, *name;
  211 };
  212 #define EISA_KNOWNDEV_NOPROD    0x01            /* match on vendor only */
  213 
  214 #include <dev/eisa/eisadevs_data.h>
  215 #endif  /* EISAVEBSOSE */
  216 
  217 void
  218 eisa_devinfo(const char *id, char *cp, size_t l)
  219 {
  220 #ifdef EISAVERBOSE
  221         const char *name;
  222         const struct eisa_knowndev *edp;
  223         int match, onlyvendor;
  224 
  225         onlyvendor = 0;
  226         name = NULL;
  227 
  228         /* find the device in the table, if possible. */
  229         for (edp = eisa_knowndevs; edp->id != NULL; edp++) {
  230                 if ((edp->flags & EISA_KNOWNDEV_NOPROD) != 0)
  231                         match = (strncmp(edp->id, id, 3) == 0);
  232                 else
  233                         match = (strcmp(edp->id, id) == 0);
  234                 if (match) {
  235                         name = edp->name;
  236                         onlyvendor = (edp->flags & EISA_KNOWNDEV_NOPROD) != 0;
  237                         break;
  238                 }
  239         }
  240 
  241         if (name == NULL)
  242                 snprintf(cp, l, "unknown device %s", id);
  243         else if (onlyvendor)
  244                 snprintf(cp, l, "unknown %s device %s", name, id);
  245         else
  246                 snprintf(cp, l, "%s", name);
  247 #else   /* EISAVERBOSE */
  248 
  249         snprintf(cp, l, "device %s", id);
  250 #endif  /* EISAVERBOSE */
  251 }

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

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sys/dev/eisa/eisa.c