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

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    1 /*      $NetBSD: cardbus.c,v 1.47.4.1 2004/07/23 22:15:16 he Exp $      */
    2 
    3 /*
    4  * Copyright (c) 1997, 1998, 1999 and 2000
    5  *     HAYAKAWA Koichi.  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 HAYAKAWA Koichi.
   18  * 4. The name of the author may not be used to endorse or promote products
   19  *    derived from this software without specific prior written permission.
   20  *
   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
   24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   25  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
   26  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   27  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   28  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   30  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   31  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   32  * POSSIBILITY OF SUCH DAMAGE.
   33  */
   34 
   35 #include <sys/cdefs.h>
   36 __KERNEL_RCSID(0, "$NetBSD: cardbus.c,v 1.47.4.1 2004/07/23 22:15:16 he Exp $");
   37 
   38 #include "opt_cardbus.h"
   39 
   40 #include <sys/param.h>
   41 #include <sys/systm.h>
   42 #include <sys/device.h>
   43 #include <sys/malloc.h>
   44 #include <sys/kernel.h>
   45 #include <sys/syslog.h>
   46 #include <sys/proc.h>
   47 #include <sys/reboot.h>         /* for AB_* needed by bootverbose */
   48 
   49 #include <machine/bus.h>
   50 
   51 #include <dev/cardbus/cardbusvar.h>
   52 #include <dev/cardbus/cardbusdevs.h>
   53 
   54 #include <dev/cardbus/cardbus_exrom.h>
   55 
   56 #include <dev/pci/pcivar.h>     /* XXX */
   57 #include <dev/pci/pcireg.h>     /* XXX */
   58 
   59 #include <dev/pcmcia/pcmciareg.h>
   60 
   61 #if defined CARDBUS_DEBUG
   62 #define STATIC
   63 #define DPRINTF(a) printf a
   64 #else
   65 #define STATIC static
   66 #define DPRINTF(a)
   67 #endif
   68 
   69 
   70 STATIC void cardbusattach(struct device *, struct device *, void *);
   71 int cardbus_attach_card(struct cardbus_softc *);
   72 
   73 STATIC int cardbusmatch(struct device *, struct cfdata *, void *);
   74 static int cardbussubmatch(struct device *, struct cfdata *, void *);
   75 static int cardbusprint(void *, const char *);
   76 
   77 typedef void (*tuple_decode_func)(u_int8_t*, int, void*);
   78 
   79 static int decode_tuples(u_int8_t *, int, tuple_decode_func, void*);
   80 #ifdef CARDBUS_DEBUG
   81 static void print_tuple(u_int8_t*, int, void*);
   82 #endif
   83 
   84 static int cardbus_read_tuples(struct cardbus_attach_args *,
   85     cardbusreg_t, u_int8_t *, size_t);
   86 
   87 static void enable_function(struct cardbus_softc *, int, int);
   88 static void disable_function(struct cardbus_softc *, int);
   89 
   90 CFATTACH_DECL(cardbus, sizeof(struct cardbus_softc),
   91     cardbusmatch, cardbusattach, NULL, NULL);
   92 
   93 #ifndef __NetBSD_Version__
   94 struct cfdriver cardbus_cd = {
   95         NULL, "cardbus", DV_DULL
   96 };
   97 #endif
   98 
   99 
  100 STATIC int
  101 cardbusmatch(struct device *parent, struct cfdata *cf, void *aux)
  102 {
  103         struct cbslot_attach_args *cba = aux;
  104 
  105         if (strcmp(cba->cba_busname, cf->cf_name)) {
  106                 DPRINTF(("cardbusmatch: busname differs %s <=> %s\n",
  107                     cba->cba_busname, cf->cf_name));
  108                 return (0);
  109         }
  110 
  111         return (1);
  112 }
  113 
  114 STATIC void
  115 cardbusattach(struct device *parent, struct device *self, void *aux)
  116 {
  117         struct cardbus_softc *sc = (void *)self;
  118         struct cbslot_attach_args *cba = aux;
  119 
  120         sc->sc_bus = cba->cba_bus;
  121         sc->sc_device = 0;
  122         sc->sc_intrline = cba->cba_intrline;
  123         sc->sc_cacheline = cba->cba_cacheline;
  124         sc->sc_lattimer = cba->cba_lattimer;
  125 
  126         printf(": bus %d device %d", sc->sc_bus, sc->sc_device);
  127         if (bootverbose)
  128                 printf(" cacheline 0x%x, lattimer 0x%x", sc->sc_cacheline,
  129                        sc->sc_lattimer);
  130         printf("\n");
  131 
  132         sc->sc_iot = cba->cba_iot;      /* CardBus I/O space tag */
  133         sc->sc_memt = cba->cba_memt;    /* CardBus MEM space tag */
  134         sc->sc_dmat = cba->cba_dmat;    /* DMA tag */
  135         sc->sc_cc = cba->cba_cc;
  136         sc->sc_cf = cba->cba_cf;
  137 
  138 #if rbus
  139         sc->sc_rbus_iot = cba->cba_rbus_iot;
  140         sc->sc_rbus_memt = cba->cba_rbus_memt;
  141 #endif
  142 
  143         sc->sc_funcs = NULL;
  144 }
  145 
  146 static int
  147 cardbus_read_tuples(struct cardbus_attach_args *ca, cardbusreg_t cis_ptr,
  148     u_int8_t *tuples, size_t len)
  149 {
  150         struct cardbus_softc *sc = ca->ca_ct->ct_sc;
  151         cardbus_chipset_tag_t cc = ca->ca_ct->ct_cc;
  152         cardbus_function_tag_t cf = ca->ca_ct->ct_cf;
  153         cardbustag_t tag = ca->ca_tag;
  154         cardbusreg_t command;
  155         bus_space_tag_t bar_tag;
  156         bus_space_handle_t bar_memh;
  157         bus_size_t bar_size;
  158         bus_addr_t bar_addr;
  159         cardbusreg_t reg;
  160         int found = 0;
  161         int cardbus_space = cis_ptr & CARDBUS_CIS_ASIMASK;
  162         int i, j;
  163 
  164         memset(tuples, 0, len);
  165 
  166         cis_ptr = cis_ptr & CARDBUS_CIS_ADDRMASK;
  167 
  168         switch (cardbus_space) {
  169         case CARDBUS_CIS_ASI_TUPLE:
  170                 DPRINTF(("%s: reading CIS data from configuration space\n",
  171                     sc->sc_dev.dv_xname));
  172                 for (i = cis_ptr, j = 0; i < 0xff; i += 4) {
  173                         u_int32_t e = (*cf->cardbus_conf_read)(cc, tag, i);
  174                         tuples[j] = 0xff & e;
  175                         e >>= 8;
  176                         tuples[j + 1] = 0xff & e;
  177                         e >>= 8;
  178                         tuples[j + 2] = 0xff & e;
  179                         e >>= 8;
  180                         tuples[j + 3] = 0xff & e;
  181                         j += 4;
  182                 }
  183                 found++;
  184                 break;
  185 
  186         case CARDBUS_CIS_ASI_BAR0:
  187         case CARDBUS_CIS_ASI_BAR1:
  188         case CARDBUS_CIS_ASI_BAR2:
  189         case CARDBUS_CIS_ASI_BAR3:
  190         case CARDBUS_CIS_ASI_BAR4:
  191         case CARDBUS_CIS_ASI_BAR5:
  192         case CARDBUS_CIS_ASI_ROM:
  193                 if (cardbus_space == CARDBUS_CIS_ASI_ROM) {
  194                         reg = CARDBUS_ROM_REG;
  195                         DPRINTF(("%s: reading CIS data from ROM\n",
  196                             sc->sc_dev.dv_xname));
  197                 } else {
  198                         reg = CARDBUS_BASE0_REG + (cardbus_space - 1) * 4;
  199                         DPRINTF(("%s: reading CIS data from BAR%d\n",
  200                             sc->sc_dev.dv_xname, cardbus_space - 1));
  201                 }
  202 
  203                 /*
  204                  * XXX zero register so mapreg_map doesn't get confused by old
  205                  * contents.
  206                  */
  207                 cardbus_conf_write(cc, cf, tag, reg, 0);
  208                 if (Cardbus_mapreg_map(ca->ca_ct, reg,
  209                     CARDBUS_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT,
  210                     0, &bar_tag, &bar_memh, &bar_addr, &bar_size)) {
  211                         printf("%s: failed to map memory\n",
  212                             sc->sc_dev.dv_xname);
  213                         return (1);
  214                 }
  215 
  216                 if (cardbus_space == CARDBUS_CIS_ASI_ROM) {
  217                         cardbusreg_t exrom;
  218                         int save;
  219                         struct cardbus_rom_image_head rom_image;
  220                         struct cardbus_rom_image *p;
  221 
  222                         save = splhigh();
  223                         /* enable rom address decoder */
  224                         exrom = cardbus_conf_read(cc, cf, tag, reg);
  225                         cardbus_conf_write(cc, cf, tag, reg, exrom | 1);
  226 
  227                         command = cardbus_conf_read(cc, cf, tag,
  228                             CARDBUS_COMMAND_STATUS_REG);
  229                         cardbus_conf_write(cc, cf, tag,
  230                             CARDBUS_COMMAND_STATUS_REG,
  231                             command | CARDBUS_COMMAND_MEM_ENABLE);
  232 
  233                         if (cardbus_read_exrom(ca->ca_memt, bar_memh,
  234                             &rom_image))
  235                                 goto out;
  236 
  237                         SIMPLEQ_FOREACH(p, &rom_image, next) {
  238                                 if (p->rom_image ==
  239                                     CARDBUS_CIS_ASI_ROM_IMAGE(cis_ptr)) {
  240                                         bus_space_read_region_1(p->romt,
  241                                             p->romh, CARDBUS_CIS_ADDR(cis_ptr),
  242                                             tuples, 256);
  243                                         found++;
  244                                 }
  245                                 break;
  246                         }
  247                         while ((p = SIMPLEQ_FIRST(&rom_image)) != NULL) {
  248                                 SIMPLEQ_REMOVE_HEAD(&rom_image, next);
  249                                 free(p, M_DEVBUF);
  250                         }
  251                 out:
  252                         exrom = cardbus_conf_read(cc, cf, tag, reg);
  253                         cardbus_conf_write(cc, cf, tag, reg, exrom & ~1);
  254                         splx(save);
  255                 } else {
  256                         command = cardbus_conf_read(cc, cf, tag,
  257                             CARDBUS_COMMAND_STATUS_REG);
  258                         cardbus_conf_write(cc, cf, tag,
  259                             CARDBUS_COMMAND_STATUS_REG,
  260                             command | CARDBUS_COMMAND_MEM_ENABLE);
  261                         /* XXX byte order? */
  262                         bus_space_read_region_1(ca->ca_memt, bar_memh,
  263                             cis_ptr, tuples, 256);
  264                         found++;
  265                 }
  266                 command = cardbus_conf_read(cc, cf, tag,
  267                     CARDBUS_COMMAND_STATUS_REG);
  268                 cardbus_conf_write(cc, cf, tag, CARDBUS_COMMAND_STATUS_REG,
  269                     command & ~CARDBUS_COMMAND_MEM_ENABLE);
  270                 cardbus_conf_write(cc, cf, tag, reg, 0);
  271 
  272                 Cardbus_mapreg_unmap(ca->ca_ct, reg, bar_tag, bar_memh,
  273                     bar_size);
  274                 break;
  275 
  276 #ifdef DIAGNOSTIC
  277         default:
  278                 panic("%s: bad CIS space (%d)", sc->sc_dev.dv_xname,
  279                     cardbus_space);
  280 #endif
  281         }
  282         return (!found);
  283 }
  284 
  285 static void
  286 parse_tuple(u_int8_t *tuple, int len, void *data)
  287 {
  288         struct cardbus_cis_info *cis = data;
  289         char *p;
  290         int i, bar_index;
  291 
  292         switch (tuple[0]) {
  293         case PCMCIA_CISTPL_MANFID:
  294                 if (tuple[1] != 5) {
  295                         DPRINTF(("%s: wrong length manufacturer id (%d)\n",
  296                             __func__, tuple[1]));
  297                         break;
  298                 }
  299                 cis->manufacturer = tuple[2] | (tuple[3] << 8);
  300                 cis->product = tuple[4] | (tuple[5] << 8);
  301                 break;
  302 
  303         case PCMCIA_CISTPL_VERS_1:
  304                 memcpy(cis->cis1_info_buf, tuple + 2, tuple[1]);
  305                 i = 0;
  306                 p = cis->cis1_info_buf + 2;
  307                 while (i <
  308                     sizeof(cis->cis1_info) / sizeof(cis->cis1_info[0])) {
  309                         cis->cis1_info[i++] = p;
  310                         while (*p != '\0' && *p != '\xff')
  311                                 p++;
  312                         if (*p == '\xff')
  313                                 break;
  314                         p++;
  315                 }
  316                 break;
  317 
  318         case PCMCIA_CISTPL_BAR:
  319                 if (tuple[1] != 6) {
  320                         DPRINTF(("%s: BAR with short length (%d)\n",
  321                             __func__, tuple[1]));
  322                         break;
  323                 }
  324                 bar_index = tuple[2] & 7;
  325                 if (bar_index == 0) {
  326                         DPRINTF(("%s: invalid ASI in BAR tuple\n", __func__));
  327                         break;
  328                 }
  329                 bar_index--;
  330                 cis->bar[bar_index].flags = tuple[2];
  331                 cis->bar[bar_index].size =
  332                     (tuple[4] << 0) |
  333                     (tuple[5] << 8) |
  334                     (tuple[6] << 16) |
  335                     (tuple[7] << 24);
  336                 break;
  337 
  338         case PCMCIA_CISTPL_FUNCID:
  339                 cis->funcid = tuple[2];
  340                 break;
  341 
  342         case PCMCIA_CISTPL_FUNCE:
  343                 switch (cis->funcid) {
  344                 case PCMCIA_FUNCTION_SERIAL:
  345                         if (tuple[1] >= 2 &&
  346                             /* XXX PCMCIA_TPLFE_TYPE_SERIAL_??? */
  347                             tuple[2] == 0) {
  348                                 cis->funce.serial.uart_type = tuple[3] & 0x1f;
  349                                 cis->funce.serial.uart_present = 1;
  350                         }
  351                         break;
  352 
  353                 case PCMCIA_FUNCTION_NETWORK:
  354                         if (tuple[1] >= 8 &&
  355                             tuple[2] == PCMCIA_TPLFE_TYPE_LAN_NID) {
  356                                 if (tuple[3] >
  357                                     sizeof(cis->funce.network.netid)) {
  358                                         DPRINTF(("%s: unknown network id type "
  359                                             "(len = %d)\n",
  360                                             __func__, tuple[3]));
  361                                 } else {
  362                                         cis->funce.network.netid_present = 1;
  363                                         memcpy(cis->funce.network.netid,
  364                                             tuple + 4, tuple[3]);
  365                                 }
  366                         }
  367                         break;
  368                 }
  369                 break;
  370         }
  371 }
  372 
  373 /*
  374  * int cardbus_attach_card(struct cardbus_softc *sc)
  375  *
  376  *    This function attaches the card on the slot: turns on power,
  377  *    reads and analyses tuple, sets configuration index.
  378  *
  379  *    This function returns the number of recognised device functions.
  380  *    If no functions are recognised, return 0.
  381  */
  382 int
  383 cardbus_attach_card(struct cardbus_softc *sc)
  384 {
  385         cardbus_chipset_tag_t cc;
  386         cardbus_function_tag_t cf;
  387         cardbustag_t tag;
  388         cardbusreg_t id, class, cis_ptr;
  389         cardbusreg_t bhlc;
  390         u_int8_t tuple[2048];
  391         int cdstatus;
  392         int function, nfunction;
  393         struct cardbus_devfunc **previous_next = &(sc->sc_funcs);
  394         struct device *csc;
  395         int no_work_funcs = 0;
  396         cardbus_devfunc_t ct;
  397 
  398         cc = sc->sc_cc;
  399         cf = sc->sc_cf;
  400 
  401         DPRINTF(("cardbus_attach_card: cb%d start\n", sc->sc_dev.dv_unit));
  402 
  403         /* inspect initial voltage */
  404         if ((cdstatus = (*cf->cardbus_ctrl)(cc, CARDBUS_CD)) == 0) {
  405                 DPRINTF(("cardbusattach: no CardBus card on cb%d\n",
  406                     sc->sc_dev.dv_unit));
  407                 return (0);
  408         }
  409 
  410         /*
  411          * XXX use fake function 8 to keep power on during whole
  412          * configuration.
  413          */
  414         enable_function(sc, cdstatus, 8);
  415         function = 0;
  416 
  417         tag = cardbus_make_tag(cc, cf, sc->sc_bus, sc->sc_device, function);
  418 
  419         /*
  420          * Wait until power comes up.  Maxmum 500 ms.
  421          */
  422         {
  423                 int i;
  424 
  425                 for (i = 0; i < 5; ++i) {
  426                         id = cardbus_conf_read(cc, cf, tag, CARDBUS_ID_REG);
  427                         if (id != 0xffffffff && id != 0) {
  428                                 break;
  429                         }
  430                         if (cold) {     /* before kernel thread invoked */
  431                                 delay(100 * 1000);
  432                         } else {        /* thread context */
  433                                 if (tsleep((void *)sc, PCATCH, "cardbus",
  434                                     hz / 10) != EWOULDBLOCK) {
  435                                         break;
  436                                 }
  437                         }
  438                 }
  439                 if (i == 5) {
  440                         return (0);
  441                 }
  442         }
  443 
  444         bhlc = cardbus_conf_read(cc, cf, tag, CARDBUS_BHLC_REG);
  445         DPRINTF(("%s bhlc 0x%08x -> ", sc->sc_dev.dv_xname, bhlc));
  446         nfunction = CARDBUS_HDRTYPE_MULTIFN(bhlc) ? 8 : 1;
  447 
  448         for (function = 0; function < nfunction; function++) {
  449                 struct cardbus_attach_args ca;
  450 
  451                 tag = cardbus_make_tag(cc, cf, sc->sc_bus, sc->sc_device,
  452                     function);
  453 
  454                 id = cardbus_conf_read(cc, cf, tag, CARDBUS_ID_REG);
  455                 class = cardbus_conf_read(cc, cf, tag, CARDBUS_CLASS_REG);
  456                 cis_ptr = cardbus_conf_read(cc, cf, tag, CARDBUS_CIS_REG);
  457 
  458                 /* Invalid vendor ID value? */
  459                 if (CARDBUS_VENDOR(id) == CARDBUS_VENDOR_INVALID) {
  460                         continue;
  461                 }
  462 
  463                 DPRINTF(("cardbus_attach_card: "
  464                     "Vendor 0x%x, Product 0x%x, CIS 0x%x\n",
  465                     CARDBUS_VENDOR(id), CARDBUS_PRODUCT(id), cis_ptr));
  466 
  467                 enable_function(sc, cdstatus, function);
  468 
  469                 /* clean up every BAR */
  470                 cardbus_conf_write(cc, cf, tag, CARDBUS_BASE0_REG, 0);
  471                 cardbus_conf_write(cc, cf, tag, CARDBUS_BASE1_REG, 0);
  472                 cardbus_conf_write(cc, cf, tag, CARDBUS_BASE2_REG, 0);
  473                 cardbus_conf_write(cc, cf, tag, CARDBUS_BASE3_REG, 0);
  474                 cardbus_conf_write(cc, cf, tag, CARDBUS_BASE4_REG, 0);
  475                 cardbus_conf_write(cc, cf, tag, CARDBUS_BASE5_REG, 0);
  476                 cardbus_conf_write(cc, cf, tag, CARDBUS_ROM_REG, 0);
  477 
  478                 /* set initial latency and cacheline size */
  479                 bhlc = cardbus_conf_read(cc, cf, tag, CARDBUS_BHLC_REG);
  480                 DPRINTF(("%s func%d bhlc 0x%08x -> ", sc->sc_dev.dv_xname,
  481                     function, bhlc));
  482                 bhlc &= ~((CARDBUS_LATTIMER_MASK << CARDBUS_LATTIMER_SHIFT) |
  483                     (CARDBUS_CACHELINE_MASK << CARDBUS_CACHELINE_SHIFT));
  484                 bhlc |= ((sc->sc_cacheline & CARDBUS_CACHELINE_MASK) << CARDBUS_CACHELINE_SHIFT);
  485                 bhlc |= ((sc->sc_lattimer & CARDBUS_LATTIMER_MASK) << CARDBUS_LATTIMER_SHIFT);
  486 
  487                 cardbus_conf_write(cc, cf, tag, CARDBUS_BHLC_REG, bhlc);
  488                 bhlc = cardbus_conf_read(cc, cf, tag, CARDBUS_BHLC_REG);
  489                 DPRINTF(("0x%08x\n", bhlc));
  490                 
  491                 if (CARDBUS_LATTIMER(bhlc) < 0x10) {
  492                         bhlc &= ~(CARDBUS_LATTIMER_MASK << CARDBUS_LATTIMER_SHIFT);
  493                         bhlc |= (0x10 << CARDBUS_LATTIMER_SHIFT);
  494                         cardbus_conf_write(cc, cf, tag, CARDBUS_BHLC_REG, bhlc);
  495                 }
  496 
  497                 /*
  498                  * We need to allocate the ct here, since we might
  499                  * need it when reading the CIS
  500                  */
  501                 if ((ct = malloc(sizeof(struct cardbus_devfunc),
  502                     M_DEVBUF, M_NOWAIT)) == NULL) {
  503                         panic("no room for cardbus_tag");
  504                 }
  505 
  506                 ct->ct_cc = sc->sc_cc;
  507                 ct->ct_cf = sc->sc_cf;
  508                 ct->ct_bus = sc->sc_bus;
  509                 ct->ct_dev = sc->sc_device;
  510                 ct->ct_func = function;
  511                 ct->ct_sc = sc;
  512                 ct->ct_next = NULL;
  513                 *previous_next = ct;
  514 
  515                 memset(&ca, 0, sizeof(ca));
  516 
  517                 ca.ca_unit = sc->sc_dev.dv_unit;
  518                 ca.ca_ct = ct;
  519 
  520                 ca.ca_iot = sc->sc_iot;
  521                 ca.ca_memt = sc->sc_memt;
  522                 ca.ca_dmat = sc->sc_dmat;
  523 
  524 #if rbus
  525                 ca.ca_rbus_iot = sc->sc_rbus_iot;
  526                 ca.ca_rbus_memt= sc->sc_rbus_memt;
  527 #endif
  528 
  529                 ca.ca_tag = tag;
  530                 ca.ca_bus = sc->sc_bus;
  531                 ca.ca_device = sc->sc_device;
  532                 ca.ca_function = function;
  533                 ca.ca_id = id;
  534                 ca.ca_class = class;
  535 
  536                 ca.ca_intrline = sc->sc_intrline;
  537 
  538                 if (cis_ptr != 0) {
  539                         if (cardbus_read_tuples(&ca, cis_ptr, tuple, sizeof(tuple))) {
  540                                 printf("cardbus_attach_card: failed to read CIS\n");
  541                         } else {
  542 #ifdef CARDBUS_DEBUG
  543                                 decode_tuples(tuple, 2048, print_tuple, NULL);
  544 #endif
  545                                 decode_tuples(tuple, 2048, parse_tuple, &ca.ca_cis);
  546                         }
  547                 }
  548 
  549                 if ((csc = config_found_sm((void *)sc, &ca, cardbusprint,
  550                     cardbussubmatch)) == NULL) {
  551                         /* do not match */
  552                         disable_function(sc, function);
  553                         free(ct, M_DEVBUF);
  554                         *previous_next = NULL;
  555                 } else {
  556                         /* found */
  557                         previous_next = &(ct->ct_next);
  558                         ct->ct_device = csc;
  559                         ++no_work_funcs;
  560                 }
  561         }
  562         /*
  563          * XXX power down pseudo function 8 (this will power down the card
  564          * if no functions were attached).
  565          */
  566         disable_function(sc, 8);
  567 
  568         return (no_work_funcs);
  569 }
  570 
  571 static int
  572 cardbussubmatch(struct device *parent, struct cfdata *cf, void *aux)
  573 {
  574         struct cardbus_attach_args *ca = aux;
  575 
  576         if (cf->cardbuscf_dev != CARDBUS_UNK_DEV &&
  577             cf->cardbuscf_dev != ca->ca_unit) {
  578                 return (0);
  579         }
  580         if (cf->cardbuscf_function != CARDBUS_UNK_FUNCTION &&
  581             cf->cardbuscf_function != ca->ca_function) {
  582                 return (0);
  583         }
  584 
  585         return (config_match(parent, cf, aux));
  586 }
  587 
  588 static int
  589 cardbusprint(void *aux, const char *pnp)
  590 {
  591         struct cardbus_attach_args *ca = aux;
  592         char devinfo[256];
  593         int i;
  594 
  595         if (pnp) {
  596                 pci_devinfo(ca->ca_id, ca->ca_class, 1, devinfo);
  597                 for (i = 0; i < 4; i++) {
  598                         if (ca->ca_cis.cis1_info[i] == NULL)
  599                                 break;
  600                         if (i)
  601                                 aprint_normal(", ");
  602                         aprint_normal("%s", ca->ca_cis.cis1_info[i]);
  603                 }
  604                 aprint_verbose("%s(manufacturer 0x%x, product 0x%x)",
  605                        i ? " " : "",
  606                        ca->ca_cis.manufacturer, ca->ca_cis.product);
  607                 aprint_normal(" %s at %s", devinfo, pnp);
  608         }
  609         aprint_normal(" dev %d function %d", ca->ca_device, ca->ca_function);
  610 
  611         return (UNCONF);
  612 }
  613 
  614 /*
  615  * void cardbus_detach_card(struct cardbus_softc *sc)
  616  *
  617  *    This function detaches the card on the slot: detach device data
  618  *    structure and turns off the power.
  619  *
  620  *    This function must not be called under interrupt context.
  621  */
  622 void
  623 cardbus_detach_card(struct cardbus_softc *sc)
  624 {
  625         struct cardbus_devfunc *ct, *ct_next, **prev_next;
  626 
  627         prev_next = &(sc->sc_funcs->ct_next);
  628 
  629         for (ct = sc->sc_funcs; ct != NULL; ct = ct_next) {
  630                 struct device *fndev = ct->ct_device;
  631                 ct_next = ct->ct_next;
  632 
  633                 DPRINTF(("%s: detaching %s\n", sc->sc_dev.dv_xname,
  634                     fndev->dv_xname));
  635                 /* call device detach function */
  636 
  637                 if (0 != config_detach(fndev, 0)) {
  638                         printf("%s: cannot detach dev %s, function %d\n",
  639                             sc->sc_dev.dv_xname, fndev->dv_xname, ct->ct_func);
  640                         prev_next = &(ct->ct_next);
  641                 } else {
  642                         sc->sc_poweron_func &= ~(1 << ct->ct_func);
  643                         *prev_next = ct->ct_next;
  644                         free(ct, M_DEVBUF);
  645                 }
  646         }
  647 
  648         sc->sc_poweron_func = 0;
  649         (*sc->sc_cf->cardbus_power)(sc->sc_cc,
  650             CARDBUS_VCC_0V | CARDBUS_VPP_0V);
  651 }
  652 
  653 /*
  654  * void *cardbus_intr_establish(cc, cf, irq, level, func, arg)
  655  *   Interrupt handler of pccard.
  656  *  args:
  657  *   cardbus_chipset_tag_t *cc
  658  *   int irq:
  659  */
  660 void *
  661 cardbus_intr_establish(cardbus_chipset_tag_t cc, cardbus_function_tag_t cf,
  662     cardbus_intr_handle_t irq, int level, int (*func)(void *), void *arg)
  663 {
  664 
  665         DPRINTF(("- cardbus_intr_establish: irq %d\n", irq));
  666         return ((*cf->cardbus_intr_establish)(cc, irq, level, func, arg));
  667 }
  668 
  669 /*
  670  * void cardbus_intr_disestablish(cc, cf, handler)
  671  *   Interrupt handler of pccard.
  672  *  args:
  673  *   cardbus_chipset_tag_t *cc
  674  */
  675 void
  676 cardbus_intr_disestablish(cardbus_chipset_tag_t cc, cardbus_function_tag_t cf,
  677     void *handler)
  678 {
  679 
  680         DPRINTF(("- pccard_intr_disestablish\n"));
  681         (*cf->cardbus_intr_disestablish)(cc, handler);
  682 }
  683 
  684 /*
  685  * XXX this should be merged with cardbus_function_{enable,disable},
  686  * but we don't have a ct when these functions are called.
  687  */
  688 static void
  689 enable_function(struct cardbus_softc *sc, int cdstatus, int function)
  690 {
  691 
  692         if (sc->sc_poweron_func == 0) {
  693                 /* switch to 3V and/or wait for power to stabilize */
  694                 if (cdstatus & CARDBUS_3V_CARD) {
  695                         /*
  696                          * sc_poweron_func must be substituted before
  697                          * entering sleep, in order to avoid turn on
  698                          * power twice.
  699                          */
  700                         sc->sc_poweron_func |= (1 << function);
  701                         (*sc->sc_cf->cardbus_power)(sc->sc_cc, CARDBUS_VCC_3V);
  702                 } else {
  703                         /* No cards other than 3.3V cards. */
  704                         return;
  705                 }
  706                 (*sc->sc_cf->cardbus_ctrl)(sc->sc_cc, CARDBUS_RESET);
  707         }
  708         sc->sc_poweron_func |= (1 << function);
  709 }
  710 
  711 static void
  712 disable_function(struct cardbus_softc *sc, int function)
  713 {
  714 
  715         sc->sc_poweron_func &= ~(1 << function);
  716         if (sc->sc_poweron_func == 0) {
  717                 /* power-off because no functions are enabled */
  718                 (*sc->sc_cf->cardbus_power)(sc->sc_cc, CARDBUS_VCC_0V);
  719         }
  720 }
  721 
  722 /*
  723  * int cardbus_function_enable(struct cardbus_softc *sc, int func)
  724  *
  725  *   This function enables a function on a card.  When no power is
  726  *  applied on the card, power will be applied on it.
  727  */
  728 int
  729 cardbus_function_enable(struct cardbus_softc *sc, int func)
  730 {
  731         cardbus_chipset_tag_t cc = sc->sc_cc;
  732         cardbus_function_tag_t cf = sc->sc_cf;
  733         cardbusreg_t command;
  734         cardbustag_t tag;
  735 
  736         DPRINTF(("entering cardbus_function_enable...  "));
  737 
  738         /* entering critical area */
  739 
  740         /* XXX: sc_vold should be used */
  741         enable_function(sc, CARDBUS_3V_CARD, func);
  742 
  743         /* exiting critical area */
  744 
  745         tag = cardbus_make_tag(cc, cf, sc->sc_bus, sc->sc_device, func);
  746 
  747         command = cardbus_conf_read(cc, cf, tag, CARDBUS_COMMAND_STATUS_REG);
  748         command |= (CARDBUS_COMMAND_MEM_ENABLE | CARDBUS_COMMAND_IO_ENABLE |
  749             CARDBUS_COMMAND_MASTER_ENABLE); /* XXX: good guess needed */
  750 
  751         cardbus_conf_write(cc, cf, tag, CARDBUS_COMMAND_STATUS_REG, command);
  752 
  753         cardbus_free_tag(cc, cf, tag);
  754 
  755         DPRINTF(("%x\n", sc->sc_poweron_func));
  756 
  757         return (0);
  758 }
  759 
  760 /*
  761  * int cardbus_function_disable(struct cardbus_softc *, int func)
  762  *
  763  *   This function disable a function on a card.  When no functions are
  764  *  enabled, it turns off the power.
  765  */
  766 int
  767 cardbus_function_disable(struct cardbus_softc *sc, int func)
  768 {
  769 
  770         DPRINTF(("entering cardbus_function_disable...  "));
  771 
  772         disable_function(sc, func);
  773 
  774         return (0);
  775 }
  776 
  777 /*
  778  * int cardbus_get_capability(cardbus_chipset_tag_t cc,
  779  *      cardbus_function_tag_t cf, cardbustag_t tag, int capid, int *offset,
  780  *      cardbusreg_t *value)
  781  *
  782  *      Find the specified PCI capability.
  783  */
  784 int
  785 cardbus_get_capability(cardbus_chipset_tag_t cc, cardbus_function_tag_t cf,
  786     cardbustag_t tag, int capid, int *offset, cardbusreg_t *value)
  787 {
  788         cardbusreg_t reg;
  789         unsigned int ofs;
  790 
  791         reg = cardbus_conf_read(cc, cf, tag, PCI_COMMAND_STATUS_REG);
  792         if (!(reg & PCI_STATUS_CAPLIST_SUPPORT))
  793                 return (0);
  794 
  795         ofs = PCI_CAPLIST_PTR(cardbus_conf_read(cc, cf, tag,
  796             PCI_CAPLISTPTR_REG));
  797         while (ofs != 0) {
  798 #ifdef DIAGNOSTIC
  799                 if ((ofs & 3) || (ofs < 0x40))
  800                         panic("cardbus_get_capability");
  801 #endif
  802                 reg = cardbus_conf_read(cc, cf, tag, ofs);
  803                 if (PCI_CAPLIST_CAP(reg) == capid) {
  804                         if (offset)
  805                                 *offset = ofs;
  806                         if (value)
  807                                 *value = reg;
  808                         return (1);
  809                 }
  810                 ofs = PCI_CAPLIST_NEXT(reg);
  811         }
  812 
  813         return (0);
  814 }
  815 
  816 /*
  817  * below this line, there are some functions for decoding tuples.
  818  * They should go out from this file.
  819  */
  820 
  821 static u_int8_t *
  822 decode_tuple(u_int8_t *tuple, tuple_decode_func func, void *data);
  823 
  824 static int
  825 decode_tuples(u_int8_t *tuple, int buflen, tuple_decode_func func, void *data)
  826 {
  827         u_int8_t *tp = tuple;
  828 
  829         if (PCMCIA_CISTPL_LINKTARGET != *tuple) {
  830                 DPRINTF(("WRONG TUPLE: 0x%x\n", *tuple));
  831                 return (0);
  832         }
  833 
  834         while (NULL != (tp = decode_tuple(tp, func, data))) {
  835                 if (tuple + buflen < tp) {
  836                         break;
  837                 }
  838         }
  839 
  840         return (1);
  841 }
  842 
  843 static u_int8_t *
  844 decode_tuple(u_int8_t *tuple, tuple_decode_func func, void *data)
  845 {
  846         u_int8_t type;
  847         u_int8_t len;
  848 
  849         type = tuple[0];
  850         len = tuple[1] + 2;
  851 
  852         (*func)(tuple, len, data);
  853 
  854         if (type == PCMCIA_CISTPL_END) {
  855                 return (NULL);
  856         }
  857 
  858         return (tuple + len);
  859 }
  860 
  861 #ifdef CARDBUS_DEBUG
  862 static const char *tuple_name(int);
  863 static const char *tuple_names[] = {
  864         "TPL_NULL", "TPL_DEVICE", "Reserved", "Reserved", /* 0-3 */
  865         "CONFIG_CB", "CFTABLE_ENTRY_CB", "Reserved", "BAR", /* 4-7 */
  866         "Reserved", "Reserved", "Reserved", "Reserved", /* 8-B */
  867         "Reserved", "Reserved", "Reserved", "Reserved", /* C-F */
  868         "CHECKSUM", "LONGLINK_A", "LONGLINK_C", "LINKTARGET", /* 10-13 */
  869         "NO_LINK", "VERS_1", "ALTSTR", "DEVICE_A",
  870         "JEDEC_C", "JEDEC_A", "CONFIG", "CFTABLE_ENTRY",
  871         "DEVICE_OC", "DEVICE_OA", "DEVICE_GEO", "DEVICE_GEO_A",
  872         "MANFID", "FUNCID", "FUNCE", "SWIL", /* 20-23 */
  873         "Reserved", "Reserved", "Reserved", "Reserved", /* 24-27 */
  874         "Reserved", "Reserved", "Reserved", "Reserved", /* 28-2B */
  875         "Reserved", "Reserved", "Reserved", "Reserved", /* 2C-2F */
  876         "Reserved", "Reserved", "Reserved", "Reserved", /* 30-33 */
  877         "Reserved", "Reserved", "Reserved", "Reserved", /* 34-37 */
  878         "Reserved", "Reserved", "Reserved", "Reserved", /* 38-3B */
  879         "Reserved", "Reserved", "Reserved", "Reserved", /* 3C-3F */
  880         "VERS_2", "FORMAT", "GEOMETRY", "BYTEORDER",
  881         "DATE", "BATTERY", "ORG"
  882 };
  883 #define NAME_LEN(x) (sizeof x / sizeof(x[0]))
  884 
  885 static const char *
  886 tuple_name(int type)
  887 {
  888 
  889         if (0 <= type && type < NAME_LEN(tuple_names)) {
  890                 return (tuple_names[type]);
  891         } else if (type == 0xff) {
  892                 return ("END");
  893         } else {
  894                 return ("Reserved");
  895         }
  896 }
  897 
  898 static void
  899 print_tuple(u_int8_t *tuple, int len, void *data)
  900 {
  901         int i;
  902 
  903         printf("tuple: %s len %d\n", tuple_name(tuple[0]), len);
  904 
  905         for (i = 0; i < len; ++i) {
  906                 if (i % 16 == 0) {
  907                         printf("  0x%2x:", i);
  908                 }
  909                 printf(" %x", tuple[i]);
  910                 if (i % 16 == 15) {
  911                         printf("\n");
  912                 }
  913         }
  914         if (i % 16 != 0) {
  915                 printf("\n");
  916         }
  917 }
  918 #endif

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