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 1.24 2010/01/18 19:00:58 pooka 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  *
   20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   30  * POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 /*
   34  * EISA bus front-end for the Digital Semiconductor ``Tulip'' (21x4x)
   35  * Ethernet controller family driver.
   36  */
   37 
   38 #include <sys/cdefs.h>
   39 __KERNEL_RCSID(0, "$NetBSD: if_tlp_eisa.c,v 1.24 2010/01/18 19:00:58 pooka Exp $");
   40 
   41 #include "opt_inet.h"
   42 
   43 #include <sys/param.h>
   44 #include <sys/systm.h>
   45 #include <sys/mbuf.h>
   46 #include <sys/malloc.h>
   47 #include <sys/kernel.h>
   48 #include <sys/socket.h>
   49 #include <sys/ioctl.h>
   50 #include <sys/errno.h>
   51 #include <sys/device.h>
   52 
   53 #include <machine/endian.h>
   54 
   55 #include <net/if.h>
   56 #include <net/if_dl.h>
   57 #include <net/if_media.h>
   58 #include <net/if_ether.h>
   59 
   60 #ifdef INET
   61 #include <netinet/in.h>
   62 #include <netinet/if_inarp.h>
   63 #endif
   64 
   65 
   66 #include <sys/bus.h>
   67 #include <sys/intr.h>
   68 
   69 #include <dev/mii/miivar.h>
   70 #include <dev/mii/mii_bitbang.h>
   71 
   72 #include <dev/ic/tulipreg.h>
   73 #include <dev/ic/tulipvar.h>
   74 
   75 #include <dev/eisa/eisareg.h>
   76 #include <dev/eisa/eisavar.h>
   77 #include <dev/eisa/eisadevs.h>
   78 
   79 #include <dev/pci/pcireg.h>
   80 
   81 /*
   82  * DE425 configuration registers; literal offsets from CSR base.
   83  * This is effectively the 21040 PCI configuration space interleaved
   84  * into the CSR space (CSRs are space 16 bytes on the DE425).
   85  *
   86  * What a cool address decoder hack they must have on that board...
   87  */
   88 #define DE425_CFID              0x08    /* Configuration ID */
   89 #define DE425_CFCS              0x0c    /* Configuration Command-Status */
   90 #define DE425_CFRV              0x18    /* Configuration Revision */
   91 #define DE425_CFLT              0x1c    /* Configuration Latency Timer */
   92 #define DE425_CBIO              0x28    /* Configuration Base I/O Address */
   93 #define DE425_CFDA              0x2c    /* Configuration Driver Area */
   94 #define DE425_ENETROM           0xc90   /* Offset in I/O space for ENETROM */
   95 #define DE425_CFG0              0xc88   /* IRQ Configuration Register */
   96 
   97 struct tulip_eisa_softc {
   98         struct tulip_softc sc_tulip;    /* real Tulip softc */
   99 
  100         /* EISA-specific goo. */
  101         void    *sc_ih;                 /* interrupt handle */
  102 };
  103 
  104 static int      tlp_eisa_match(device_t, cfdata_t, void *);
  105 static void     tlp_eisa_attach(device_t, device_t, void *);
  106 
  107 CFATTACH_DECL_NEW(tlp_eisa, sizeof(struct tulip_eisa_softc),
  108     tlp_eisa_match, tlp_eisa_attach, NULL, NULL);
  109 
  110 static const int tlp_eisa_irqs[] = { 5, 9, 10, 11 };
  111 
  112 static const struct tulip_eisa_product {
  113         const char      *tep_eisaid;    /* EISA ID */
  114         const char      *tep_name;      /* device name */
  115         tulip_chip_t    tep_chip;       /* base Tulip chip type */
  116 } tlp_eisa_products[] = {
  117         { "DEC4250",                    "DEC DE425",
  118           TULIP_CHIP_DE425 },
  119 
  120         { NULL,                         NULL,
  121           TULIP_CHIP_INVALID },
  122 };
  123 
  124 static const struct tulip_eisa_product *
  125 tlp_eisa_lookup(const struct eisa_attach_args *ea)
  126 {
  127         const struct tulip_eisa_product *tep;
  128 
  129         for (tep = tlp_eisa_products;
  130              tep->tep_chip != TULIP_CHIP_INVALID; tep++)
  131                 if (strcmp(ea->ea_idstring, tep->tep_eisaid) == 0)
  132                         return (tep);
  133         return (NULL);
  134 }
  135 
  136 static int
  137 tlp_eisa_match(device_t parent, cfdata_t match,
  138     void *aux)
  139 {
  140         struct eisa_attach_args *ea = aux;
  141 
  142         if (tlp_eisa_lookup(ea) != NULL)
  143                 return (1);
  144 
  145         return (0);
  146 }
  147 
  148 static void
  149 tlp_eisa_attach(device_t parent, device_t self, void *aux)
  150 {
  151         static const u_int8_t testpat[] =
  152             { 0xff, 0, 0x55, 0xaa, 0xff, 0, 0x55, 0xaa };
  153         struct tulip_eisa_softc *esc = device_private(self);
  154         struct tulip_softc *sc = &esc->sc_tulip;
  155         struct eisa_attach_args *ea = aux;
  156         eisa_chipset_tag_t ec = ea->ea_ec;
  157         eisa_intr_handle_t ih;
  158         bus_space_tag_t iot = ea->ea_iot;
  159         bus_space_handle_t ioh;
  160         const char *intrstr;
  161         const struct tulip_eisa_product *tep;
  162         u_int8_t enaddr[ETHER_ADDR_LEN], tmpbuf[sizeof(testpat)];
  163         u_int32_t val;
  164         int irq, i, cnt;
  165 
  166         /*
  167          * Map the device.
  168          */
  169         if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot),
  170             EISA_SLOT_SIZE, 0, &ioh)) {
  171                 printf(": unable to map I/O space\n");
  172                 return;
  173         }
  174 
  175         sc->sc_dev = self;
  176         sc->sc_st = iot;
  177         sc->sc_sh = ioh;
  178 
  179         tep = tlp_eisa_lookup(ea);
  180         if (tep == NULL) {
  181                 printf("\n");
  182                 panic("tlp_eisa_attach: impossible");
  183         }
  184         sc->sc_chip = tep->tep_chip;
  185 
  186         /*
  187          * DE425's registers are 16 bytes long; the PCI configuration
  188          * space registers are interleaved in the I/O space.
  189          */
  190         sc->sc_regshift = 4;
  191 
  192         /*
  193          * No power management hooks.
  194          */
  195         sc->sc_flags |= TULIPF_ENABLED;
  196 
  197         /*
  198          * CBIO must map the EISA slot, and I/O access and Bus Mastering
  199          * must be enabled.
  200          */
  201         bus_space_write_4(iot, ioh, DE425_CBIO, EISA_SLOT_ADDR(ea->ea_slot));
  202         bus_space_write_4(iot, ioh, DE425_CFCS,
  203             bus_space_read_4(iot, ioh, DE425_CFCS) |
  204             PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MASTER_ENABLE);
  205 
  206         /*
  207          * Get revision info.
  208          */
  209         sc->sc_rev = bus_space_read_4(iot, ioh, DE425_CFRV) & 0xff;
  210 
  211         printf(": %s Ethernet, pass %d.%d\n",
  212             tep->tep_name, (sc->sc_rev >> 4) & 0xf, sc->sc_rev & 0xf);
  213 
  214         sc->sc_dmat = ea->ea_dmat;
  215 
  216         /*
  217          * EISA doesn't have a cache line register.
  218          */
  219         sc->sc_cacheline = 0;
  220 
  221         /*
  222          * Find the beginning of the Ethernet Address ROM.
  223          */
  224         for (i = 0, cnt = 0; i < sizeof(testpat) && cnt < 32; cnt++) {
  225                 tmpbuf[i] = bus_space_read_1(iot, ioh, DE425_ENETROM);
  226                 if (tmpbuf[i] == testpat[i])
  227                         i++;
  228                 else
  229                         i = 0;
  230         }
  231 
  232         /*
  233          * ...and now read the contents of the Ethernet Address ROM.
  234          */
  235         sc->sc_srom = malloc(32, M_DEVBUF, M_WAITOK|M_ZERO);
  236         for (i = 0; i < 32; i++)
  237                 sc->sc_srom[i] = bus_space_read_1(iot, ioh, DE425_ENETROM);
  238 
  239         /*
  240          * None of the DE425 boards have the new-style SROMs.
  241          */
  242         if (tlp_parse_old_srom(sc, enaddr) == 0) {
  243                 aprint_error_dev(self, "unable to decode old-style SROM\n");
  244                 return;
  245         }
  246 
  247         /*
  248          * All DE425 boards use the 21040 media switch.
  249          */
  250         sc->sc_mediasw = &tlp_21040_mediasw;
  251 
  252         /*
  253          * Figure out which IRQ we want to use, and determine of it's
  254          * edge- or level-triggered.
  255          */
  256         val = bus_space_read_4(iot, ioh, DE425_CFG0);
  257         irq = tlp_eisa_irqs[(val >> 1) & 0x03];
  258 
  259         /*
  260          * Map and establish our interrupt.
  261          */
  262         if (eisa_intr_map(ec, irq, &ih)) {
  263                 aprint_error_dev(self, "unable to map interrupt (%u)\n",
  264                     irq);
  265                 return;
  266         }
  267         intrstr = eisa_intr_string(ec, ih);
  268         esc->sc_ih = eisa_intr_establish(ec, ih,
  269             (val & 0x01) ? IST_EDGE : IST_LEVEL, IPL_NET, tlp_intr, sc);
  270         if (esc->sc_ih == NULL) {
  271                 aprint_error_dev(self, "unable to establish interrupt");
  272                 if (intrstr != NULL)
  273                         aprint_error(" at %s", intrstr);
  274                 aprint_error("\n");
  275                 return;
  276         }
  277         if (intrstr != NULL)
  278                 aprint_normal_dev(self, "interrupting at %s\n", intrstr);
  279 
  280         /*
  281          * Finish off the attach.
  282          */
  283         tlp_attach(sc, enaddr);
  284 }

Cache object: 05c874fc8d0bac19c88881b17bcb72fb


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