The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/ep/if_ep_isa.c

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    1 /*-
    2  * Copyright (c) 1994 Herb Peyerl <hpeyerl@novatel.ca>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by Herb Peyerl.
   16  * 4. The name of Herb Peyerl may not be used to endorse or promote products
   17  *    derived from this software without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD: releng/8.4/sys/dev/ep/if_ep_isa.c 166901 2007-02-23 12:19:07Z piso $");
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/kernel.h>
   37 #include <sys/socket.h>
   38 #include <sys/module.h>
   39 #include <sys/bus.h>
   40 
   41 #include <machine/bus.h>
   42 #include <machine/resource.h>
   43 #include <sys/rman.h>
   44 
   45 #include <net/if.h>
   46 #include <net/if_arp.h>
   47 #include <net/if_media.h>
   48 
   49 #include <isa/isavar.h>
   50 
   51 #include <dev/ep/if_epreg.h>
   52 #include <dev/ep/if_epvar.h>
   53 
   54 #ifdef __i386__
   55 #include <i386/isa/elink.h>
   56 #endif
   57 
   58 #ifdef __i386__
   59 static uint16_t get_eeprom_data(int, int);
   60 static void ep_isa_identify(driver_t *, device_t);
   61 #endif
   62 
   63 static int ep_isa_probe(device_t);
   64 static int ep_isa_attach(device_t);
   65 static int ep_eeprom_cksum(struct ep_softc *);
   66 
   67 struct isa_ident {
   68         uint32_t id;
   69         char *name;
   70 };
   71 const char *ep_isa_match_id(uint32_t, struct isa_ident *);
   72 
   73 #define ISA_ID_3C509_XXX   0x0506d509
   74 #define ISA_ID_3C509_TP    0x506d5090
   75 #define ISA_ID_3C509_BNC   0x506d5091
   76 #define ISA_ID_3C509_COMBO 0x506d5094
   77 #define ISA_ID_3C509_TPO   0x506d5095
   78 #define ISA_ID_3C509_TPC   0x506d5098
   79 #ifdef PC98
   80 #define ISA_ID_3C569B_COMBO 0x506d5694
   81 #define ISA_ID_3C569B_TPO   0x506d5695
   82 #endif
   83 
   84 #ifdef __i386__
   85 static struct isa_ident ep_isa_devs[] = {
   86         {ISA_ID_3C509_TP, "3Com 3C509-TP EtherLink III"},
   87         {ISA_ID_3C509_BNC, "3Com 3C509-BNC EtherLink III"},
   88         {ISA_ID_3C509_COMBO, "3Com 3C509-Combo EtherLink III"},
   89         {ISA_ID_3C509_TPO, "3Com 3C509-TPO EtherLink III"},
   90         {ISA_ID_3C509_TPC, "3Com 3C509-TPC EtherLink III"},
   91 #ifdef PC98
   92         {ISA_ID_3C569B_COMBO, "3Com 3C569B-J-Combo EtherLink III"},
   93         {ISA_ID_3C569B_TPO, "3Com 3C569B-J-TPO EtherLink III"},
   94 #endif
   95         {0, NULL},
   96 };
   97 #endif
   98 
   99 static struct isa_pnp_id ep_ids[] = {
  100         {0x90506d50, "3Com 3C509B-TP EtherLink III (PnP)"},     /* TCM5090 */
  101         {0x91506d50, "3Com 3C509B-BNC EtherLink III (PnP)"},    /* TCM5091 */
  102         {0x94506d50, "3Com 3C509B-Combo EtherLink III (PnP)"},  /* TCM5094 */
  103         {0x95506d50, "3Com 3C509B-TPO EtherLink III (PnP)"},    /* TCM5095 */
  104         {0x98506d50, "3Com 3C509B-TPC EtherLink III (PnP)"},    /* TCM5098 */
  105         {0xf780d041, NULL},     /* PNP80f7 */
  106         {0, NULL},
  107 };
  108 
  109 /*
  110  * We get eeprom data from the id_port given an offset into the eeprom.
  111  * Basically; after the ID_sequence is sent to all of the cards; they enter
  112  * the ID_CMD state where they will accept command requests. 0x80-0xbf loads
  113  * the eeprom data.  We then read the port 16 times and with every read; the
  114  * cards check for contention (ie: if one card writes a 0 bit and another
  115  * writes a 1 bit then the host sees a 0. At the end of the cycle; each card
  116  * compares the data on the bus; if there is a difference then that card goes
  117  * into ID_WAIT state again). In the meantime; one bit of data is returned in
  118  * the AX register which is conveniently returned to us by inb().  Hence; we
  119  * read 16 times getting one bit of data with each read.
  120  */
  121 #ifdef __i386__
  122 static uint16_t
  123 get_eeprom_data(int id_port, int offset)
  124 {
  125         int i;
  126         uint16_t data = 0;
  127 
  128         outb(id_port, EEPROM_CMD_RD | offset);
  129         DELAY(BIT_DELAY_MULTIPLE * 1000);
  130         for (i = 0; i < 16; i++) {
  131                 DELAY(50);
  132                 data = (data << 1) | (inw(id_port) & 1);
  133         }
  134         return (data);
  135 }
  136 #endif
  137 
  138 const char *
  139 ep_isa_match_id(uint32_t id, struct isa_ident *isa_devs)
  140 {
  141         struct isa_ident *i = isa_devs;
  142 
  143         while (i->name != NULL) {
  144                 if (id == i->id)
  145                         return (i->name);
  146                 i++;
  147         }
  148         /*
  149          * If we see a card that is likely to be a 3c509
  150          * return something so that it will work; be annoying
  151          * so that the user will tell us about it though.
  152          */
  153         if ((id >> 4) == ISA_ID_3C509_XXX)
  154                 return ("Unknown 3c509; notify maintainer!");
  155         return (NULL);
  156 }
  157 
  158 #ifdef __i386__
  159 static void
  160 ep_isa_identify(driver_t * driver, device_t parent)
  161 {
  162         int tag = EP_LAST_TAG;
  163         int found = 0;
  164         int i;
  165         int j;
  166         const char *desc;
  167         uint16_t data;
  168         uint32_t irq;
  169         uint32_t ioport;
  170         uint32_t isa_id;
  171         device_t child;
  172 
  173         outb(ELINK_ID_PORT, 0);
  174         outb(ELINK_ID_PORT, 0);
  175         elink_idseq(ELINK_509_POLY);
  176         elink_reset();
  177 
  178         DELAY(DELAY_MULTIPLE * 10000);
  179 
  180         for (i = 0; i < EP_MAX_BOARDS; i++) {
  181 
  182                 outb(ELINK_ID_PORT, 0);
  183                 outb(ELINK_ID_PORT, 0);
  184                 elink_idseq(ELINK_509_POLY);
  185                 DELAY(400);
  186 
  187                 /*
  188                  * For the first probe, clear all board's tag registers.
  189                  * Otherwise kill off already-found boards. -- linux 3c509.c
  190                  */
  191                 if (i == 0)
  192                         outb(ELINK_ID_PORT, 0xd0);
  193                 else
  194                         outb(ELINK_ID_PORT, 0xd8);
  195 
  196                 /* Get out of loop if we're out of cards. */
  197                 data = get_eeprom_data(ELINK_ID_PORT, EEPROM_MFG_ID);
  198                 if (data != MFG_ID)
  199                         break;
  200                 /* resolve contention using the Ethernet address */
  201                 for (j = 0; j < 3; j++)
  202                         (void)get_eeprom_data(ELINK_ID_PORT, j);
  203 
  204                 /*
  205                  * Construct an 'isa_id' in 'EISA'
  206                  * format.
  207                  */
  208                 data = get_eeprom_data(ELINK_ID_PORT, EEPROM_MFG_ID);
  209                 isa_id = (htons(data) << 16);
  210                 data = get_eeprom_data(ELINK_ID_PORT, EEPROM_PROD_ID);
  211                 isa_id |= htons(data);
  212 
  213                 /* Find known ISA boards */
  214                 desc = ep_isa_match_id(isa_id, ep_isa_devs);
  215                 if (!desc) {
  216                         if (bootverbose)
  217                                 device_printf(parent,
  218                                     "unknown ID 0x%08x\n", isa_id);
  219                         continue;
  220                 }
  221                 /* Retreive IRQ */
  222                 data = get_eeprom_data(ELINK_ID_PORT, EEPROM_RESOURCE_CFG);
  223                 irq = (data >> 12);
  224 
  225                 /* Retreive IOPORT */
  226                 data = get_eeprom_data(ELINK_ID_PORT, EEPROM_ADDR_CFG);
  227 #ifdef PC98
  228                 ioport = (((data & ADDR_CFG_MASK) * 0x100) + 0x40d0);
  229 #else
  230                 ioport = (((data & ADDR_CFG_MASK) << 4) + 0x200);
  231 #endif
  232 
  233                 if ((data & ADDR_CFG_MASK) == ADDR_CFG_EISA) {
  234                         device_printf(parent,
  235                             "<%s> at port 0x%03x in EISA mode!\n",
  236                             desc, ioport);
  237                         /*
  238                          * Set the adaptor tag so that the next card can be
  239                          * found.
  240                          */
  241                         outb(ELINK_ID_PORT, tag--);
  242                         continue;
  243                 }
  244                 /* Test for an adapter with PnP support. */
  245                 data = get_eeprom_data(ELINK_ID_PORT, EEPROM_CAP);
  246                 if (data == CAP_ISA) {
  247                         data = get_eeprom_data(ELINK_ID_PORT,
  248                             EEPROM_INT_CONFIG_1);
  249                         if (data & ICW1_IAS_PNP) {
  250                                 if (bootverbose)
  251                                         device_printf(parent,
  252                                             "<%s> at 0x%03x "
  253                                             "in PnP mode!\n",
  254                                             desc, ioport);
  255                                 /*
  256                                  * Set the adaptor tag so that the next card
  257                                  * can be found.
  258                                  */
  259                                 outb(ELINK_ID_PORT, tag--);
  260                                 continue;
  261                         }
  262                 }
  263                 /* Set the adaptor tag so that the next card can be found. */
  264                 outb(ELINK_ID_PORT, tag--);
  265 
  266                 /* Activate the adaptor at the EEPROM location. */
  267                 outb(ELINK_ID_PORT, ACTIVATE_ADAPTER_TO_CONFIG);
  268 
  269                 /* Test for an adapter in TEST mode. */
  270                 outw(ioport + EP_COMMAND, WINDOW_SELECT | 0);
  271                 data = inw(ioport + EP_W0_EEPROM_COMMAND);
  272                 if (data & EEPROM_TST_MODE) {
  273                         device_printf(parent,
  274                             "<%s> at port 0x%03x in TEST mode!"
  275                             "  Erase pencil mark.\n",
  276                             desc, ioport);
  277                         continue;
  278                 }
  279                 child = BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "ep", -1);
  280                 device_set_desc_copy(child, desc);
  281                 device_set_driver(child, driver);
  282                 bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1);
  283                 bus_set_resource(child, SYS_RES_IOPORT, 0, ioport, EP_IOSIZE);
  284 
  285                 if (bootverbose)
  286                         device_printf(parent,
  287                             "<%s>"
  288                             " at port 0x%03x-0x%03x irq %d\n",
  289                             desc, ioport, ioport + EP_IOSIZE, irq);
  290                 found++;
  291         }
  292 }
  293 #endif
  294 
  295 static int
  296 ep_isa_probe(device_t dev)
  297 {
  298         int error = 0;
  299 
  300         /* Check isapnp ids */
  301         error = ISA_PNP_PROBE(device_get_parent(dev), dev, ep_ids);
  302 
  303         /* If the card had a PnP ID that didn't match any we know about */
  304         if (error == ENXIO)
  305                 return (error);
  306 
  307         /* If we had some other problem. */
  308         if (!(error == 0 || error == ENOENT))
  309                 return (error);
  310 
  311         /* If we have the resources we need then we're good to go. */
  312         if ((bus_get_resource_start(dev, SYS_RES_IOPORT, 0) != 0) &&
  313             (bus_get_resource_start(dev, SYS_RES_IRQ, 0) != 0))
  314                 return (0);
  315 
  316         return (ENXIO);
  317 }
  318 
  319 static int
  320 ep_isa_attach(device_t dev)
  321 {
  322         struct ep_softc *sc = device_get_softc(dev);
  323         int error = 0;
  324 
  325         if ((error = ep_alloc(dev)))
  326                 goto bad;
  327         ep_get_media(sc);
  328 
  329         GO_WINDOW(sc, 0);
  330         SET_IRQ(sc, rman_get_start(sc->irq));
  331 
  332         if ((error = ep_attach(sc)))
  333                 goto bad;
  334         error = ep_eeprom_cksum(sc);
  335         if (error) {
  336                 device_printf(sc->dev, "Invalid EEPROM checksum!\n");
  337                 goto bad;
  338         }
  339         if ((error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET | INTR_MPSAFE, 
  340             NULL, ep_intr, sc, &sc->ep_intrhand))) {
  341                 device_printf(dev, "bus_setup_intr() failed! (%d)\n", error);
  342                 goto bad;
  343         }
  344         return (0);
  345 bad:
  346         ep_free(dev);
  347         return (error);
  348 }
  349 
  350 static int
  351 ep_eeprom_cksum(struct ep_softc *sc)
  352 {
  353         int i;
  354         int error;
  355         uint16_t val;
  356         uint16_t cksum;
  357         uint8_t cksum_high = 0;
  358         uint8_t cksum_low = 0;
  359 
  360         error = ep_get_e(sc, 0x0f, &val);
  361         if (error)
  362                 return (ENXIO);
  363         cksum = val;
  364 
  365         for (i = 0; i < 0x0f; i++) {
  366                 error = ep_get_e(sc, i, &val);
  367                 if (error)
  368                         return (ENXIO);
  369                 switch (i) {
  370                 case 0x08:
  371                 case 0x09:
  372                 case 0x0d:
  373                         cksum_low ^= (uint8_t) (val & 0x00ff) ^
  374                             (uint8_t)((val & 0xff00) >> 8);
  375                         break;
  376                 default:
  377                         cksum_high ^= (uint8_t) (val & 0x00ff) ^
  378                             (uint8_t)((val & 0xff00) >> 8);
  379                         break;
  380                 }
  381         }
  382         return (cksum != ((uint16_t)cksum_low | (uint16_t)(cksum_high << 8)));
  383 }
  384 
  385 static device_method_t ep_isa_methods[] = {
  386         /* Device interface */
  387 #ifdef __i386__
  388         DEVMETHOD(device_identify, ep_isa_identify),
  389 #endif
  390         DEVMETHOD(device_probe, ep_isa_probe),
  391         DEVMETHOD(device_attach, ep_isa_attach),
  392         DEVMETHOD(device_detach, ep_detach),
  393 
  394         {0, 0}
  395 };
  396 
  397 static driver_t ep_isa_driver = {
  398         "ep",
  399         ep_isa_methods,
  400         sizeof(struct ep_softc),
  401 };
  402 
  403 extern devclass_t ep_devclass;
  404 
  405 DRIVER_MODULE(ep, isa, ep_isa_driver, ep_devclass, 0, 0);
  406 #ifdef __i386__
  407 MODULE_DEPEND(ep, elink, 1, 1, 1);
  408 #endif

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