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/if_tlp_eisa.c

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    1 /*      $NetBSD: if_tlp_eisa.c,v 1.13 2005/02/27 00:26:59 perry Exp $   */
    2 
    3 /*-
    4  * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
    9  * NASA Ames Research Center.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. All advertising materials mentioning features or use of this software
   20  *    must display the following acknowledgement:
   21  *      This product includes software developed by the NetBSD
   22  *      Foundation, Inc. and its contributors.
   23  * 4. Neither the name of The NetBSD Foundation nor the names of its
   24  *    contributors may be used to endorse or promote products derived
   25  *    from this software without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   37  * POSSIBILITY OF SUCH DAMAGE.
   38  */
   39 
   40 /*
   41  * EISA bus front-end for the Digital Semiconductor ``Tulip'' (21x4x)
   42  * Ethernet controller family driver.
   43  */
   44 
   45 #include <sys/cdefs.h>
   46 __KERNEL_RCSID(0, "$NetBSD: if_tlp_eisa.c,v 1.13 2005/02/27 00:26:59 perry Exp $");
   47 
   48 #include "opt_inet.h"
   49 #include "opt_ns.h"
   50 #include "bpfilter.h"
   51 
   52 #include <sys/param.h>
   53 #include <sys/systm.h>
   54 #include <sys/mbuf.h>
   55 #include <sys/malloc.h>
   56 #include <sys/kernel.h>
   57 #include <sys/socket.h>
   58 #include <sys/ioctl.h>
   59 #include <sys/errno.h>
   60 #include <sys/device.h>
   61 
   62 #include <machine/endian.h>
   63 
   64 #include <net/if.h>
   65 #include <net/if_dl.h>
   66 #include <net/if_media.h>
   67 #include <net/if_ether.h>
   68 
   69 #if NBPFILTER > 0
   70 #include <net/bpf.h>
   71 #endif
   72 
   73 #ifdef INET
   74 #include <netinet/in.h>
   75 #include <netinet/if_inarp.h>
   76 #endif
   77 
   78 #ifdef NS
   79 #include <netns/ns.h>
   80 #include <netns/ns_if.h>
   81 #endif
   82 
   83 #include <machine/bus.h>
   84 #include <machine/intr.h>
   85 
   86 #include <dev/mii/miivar.h>
   87 #include <dev/mii/mii_bitbang.h>
   88 
   89 #include <dev/ic/tulipreg.h>
   90 #include <dev/ic/tulipvar.h>
   91 
   92 #include <dev/eisa/eisareg.h>
   93 #include <dev/eisa/eisavar.h>
   94 #include <dev/eisa/eisadevs.h>
   95 
   96 #include <dev/pci/pcireg.h>
   97 
   98 /*
   99  * DE425 configuration registers; literal offsets from CSR base.
  100  * This is effectively the 21040 PCI configuration space interleaved
  101  * into the CSR space (CSRs are space 16 bytes on the DE425).
  102  *
  103  * What a cool address decoder hack they must have on that board...
  104  */
  105 #define DE425_CFID              0x08    /* Configuration ID */
  106 #define DE425_CFCS              0x0c    /* Configuration Command-Status */
  107 #define DE425_CFRV              0x18    /* Configuration Revision */
  108 #define DE425_CFLT              0x1c    /* Configuration Latency Timer */
  109 #define DE425_CBIO              0x28    /* Configuration Base I/O Address */
  110 #define DE425_CFDA              0x2c    /* Configuration Driver Area */
  111 #define DE425_ENETROM           0xc90   /* Offset in I/O space for ENETROM */
  112 #define DE425_CFG0              0xc88   /* IRQ Configuration Register */
  113 
  114 struct tulip_eisa_softc {
  115         struct tulip_softc sc_tulip;    /* real Tulip softc */
  116 
  117         /* EISA-specific goo. */
  118         void    *sc_ih;                 /* interrupt handle */
  119 };
  120 
  121 static int      tlp_eisa_match(struct device *, struct cfdata *, void *);
  122 static void     tlp_eisa_attach(struct device *, struct device *, void *);
  123 
  124 CFATTACH_DECL(tlp_eisa, sizeof(struct tulip_eisa_softc),
  125     tlp_eisa_match, tlp_eisa_attach, NULL, NULL);
  126 
  127 static const int tlp_eisa_irqs[] = { 5, 9, 10, 11 };
  128 
  129 static const struct tulip_eisa_product {
  130         const char      *tep_eisaid;    /* EISA ID */
  131         const char      *tep_name;      /* device name */
  132         tulip_chip_t    tep_chip;       /* base Tulip chip type */
  133 } tlp_eisa_products[] = {
  134         { "DEC4250",                    "DEC DE425",
  135           TULIP_CHIP_DE425 },
  136 
  137         { NULL,                         NULL,
  138           TULIP_CHIP_INVALID },
  139 };
  140 
  141 static const struct tulip_eisa_product *
  142 tlp_eisa_lookup(const struct eisa_attach_args *ea)
  143 {
  144         const struct tulip_eisa_product *tep;
  145 
  146         for (tep = tlp_eisa_products;
  147              tep->tep_chip != TULIP_CHIP_INVALID; tep++)
  148                 if (strcmp(ea->ea_idstring, tep->tep_eisaid) == 0)
  149                         return (tep);
  150         return (NULL);
  151 }
  152 
  153 static int
  154 tlp_eisa_match(struct device *parent, struct cfdata *match, void *aux)
  155 {
  156         struct eisa_attach_args *ea = aux;
  157 
  158         if (tlp_eisa_lookup(ea) != NULL)
  159                 return (1);
  160 
  161         return (0);
  162 }
  163 
  164 static void
  165 tlp_eisa_attach(struct device *parent, struct device *self, void *aux)
  166 {
  167         static const u_int8_t testpat[] =
  168             { 0xff, 0, 0x55, 0xaa, 0xff, 0, 0x55, 0xaa };
  169         struct tulip_eisa_softc *esc = (void *) self;
  170         struct tulip_softc *sc = &esc->sc_tulip;
  171         struct eisa_attach_args *ea = aux;
  172         eisa_chipset_tag_t ec = ea->ea_ec;
  173         eisa_intr_handle_t ih;
  174         bus_space_tag_t iot = ea->ea_iot;
  175         bus_space_handle_t ioh;
  176         const char *intrstr;
  177         const struct tulip_eisa_product *tep;
  178         u_int8_t enaddr[ETHER_ADDR_LEN], tmpbuf[sizeof(testpat)];
  179         u_int32_t val;
  180         int irq, i, cnt;
  181 
  182         /*
  183          * Map the device.
  184          */
  185         if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot),
  186             EISA_SLOT_SIZE, 0, &ioh)) {
  187                 printf(": unable to map I/O space\n");
  188                 return;
  189         }
  190 
  191         sc->sc_st = iot;
  192         sc->sc_sh = ioh;
  193 
  194         tep = tlp_eisa_lookup(ea);
  195         if (tep == NULL) {
  196                 printf("\n");
  197                 panic("tlp_eisa_attach: impossible");
  198         }
  199         sc->sc_chip = tep->tep_chip;
  200 
  201         /*
  202          * DE425's registers are 16 bytes long; the PCI configuration
  203          * space registers are interleaved in the I/O space.
  204          */
  205         sc->sc_regshift = 4;
  206 
  207         /*
  208          * No power management hooks.
  209          */
  210         sc->sc_flags |= TULIPF_ENABLED;
  211 
  212         /*
  213          * CBIO must map the EISA slot, and I/O access and Bus Mastering
  214          * must be enabled.
  215          */
  216         bus_space_write_4(iot, ioh, DE425_CBIO, EISA_SLOT_ADDR(ea->ea_slot));
  217         bus_space_write_4(iot, ioh, DE425_CFCS,
  218             bus_space_read_4(iot, ioh, DE425_CFCS) |
  219             PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MASTER_ENABLE);
  220 
  221         /*
  222          * Get revision info.
  223          */
  224         sc->sc_rev = bus_space_read_4(iot, ioh, DE425_CFRV) & 0xff;
  225 
  226         printf(": %s Ethernet, pass %d.%d\n",
  227             tep->tep_name, (sc->sc_rev >> 4) & 0xf, sc->sc_rev & 0xf);
  228 
  229         sc->sc_dmat = ea->ea_dmat;
  230 
  231         /*
  232          * EISA doesn't have a cache line register.
  233          */
  234         sc->sc_cacheline = 0;
  235 
  236         /*
  237          * Find the beginning of the Ethernet Address ROM.
  238          */
  239         for (i = 0, cnt = 0; i < sizeof(testpat) && cnt < 32; cnt++) {
  240                 tmpbuf[i] = bus_space_read_1(iot, ioh, DE425_ENETROM);
  241                 if (tmpbuf[i] == testpat[i])
  242                         i++;
  243                 else
  244                         i = 0;
  245         }
  246 
  247         /*
  248          * ...and now read the contents of the Ethernet Address ROM.
  249          */
  250         sc->sc_srom = malloc(32, M_DEVBUF, M_WAITOK|M_ZERO);
  251         for (i = 0; i < 32; i++)
  252                 sc->sc_srom[i] = bus_space_read_1(iot, ioh, DE425_ENETROM);
  253 
  254         /*
  255          * None of the DE425 boards have the new-style SROMs.
  256          */
  257         if (tlp_parse_old_srom(sc, enaddr) == 0) {
  258                 printf("%s: unable to decode old-style SROM\n",
  259                     sc->sc_dev.dv_xname);
  260                 return;
  261         }
  262 
  263         /*
  264          * All DE425 boards use the 21040 media switch.
  265          */
  266         sc->sc_mediasw = &tlp_21040_mediasw;
  267 
  268         /*
  269          * Figure out which IRQ we want to use, and determine of it's
  270          * edge- or level-triggered.
  271          */
  272         val = bus_space_read_4(iot, ioh, DE425_CFG0);
  273         irq = tlp_eisa_irqs[(val >> 1) & 0x03];
  274 
  275         /*
  276          * Map and establish our interrupt.
  277          */
  278         if (eisa_intr_map(ec, irq, &ih)) {
  279                 printf("%s: unable to map interrupt (%u)\n",
  280                     sc->sc_dev.dv_xname, irq);
  281                 return;
  282         }
  283         intrstr = eisa_intr_string(ec, ih);
  284         esc->sc_ih = eisa_intr_establish(ec, ih,
  285             (val & 0x01) ? IST_EDGE : IST_LEVEL, IPL_NET, tlp_intr, sc);
  286         if (esc->sc_ih == NULL) {
  287                 printf("%s: unable to establish interrupt",
  288                     sc->sc_dev.dv_xname);
  289                 if (intrstr != NULL)
  290                         printf(" at %s", intrstr);
  291                 printf("\n");
  292                 return;
  293         }
  294         if (intrstr != NULL)
  295                 printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname,
  296                     intrstr);
  297 
  298         /*
  299          * Finish off the attach.
  300          */
  301         tlp_attach(sc, enaddr);
  302 }

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