macio.c

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    1 /*-
    2  * Copyright 2002 by Peter Grehan. All rights reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  * 3. The name of the author may not be used to endorse or promote products
   13  *    derived from this software without specific prior written permission.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   20  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   22  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   23  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  * $FreeBSD$
   28  */
   29 
   30 /*
   31  * Driver for KeyLargo/Pangea, the MacPPC south bridge ASIC.
   32  */
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/kernel.h>
   37 #include <sys/malloc.h>
   38 #include <sys/module.h>
   39 #include <sys/bus.h>
   40 #include <sys/rman.h>
   41 
   42 #include <vm/vm.h>
   43 #include <vm/pmap.h>
   44 
   45 #include <machine/bus.h>
   46 #include <machine/intr_machdep.h>
   47 #include <machine/pmap.h>
   48 #include <machine/resource.h>
   49 #include <machine/vmparam.h>
   50 
   51 #include <dev/ofw/ofw_bus.h>
   52 #include <dev/ofw/ofw_bus_subr.h>
   53 #include <dev/ofw/openfirm.h>
   54 
   55 #include <powerpc/powermac/maciovar.h>
   56 
   57 #include <dev/pci/pcivar.h>
   58 #include <dev/pci/pcireg.h>
   59 
   60 /*
   61  * Macio softc
   62  */
   63 struct macio_softc {
   64         phandle_t    sc_node;
   65         vm_offset_t  sc_base;
   66         vm_offset_t  sc_size;
   67         struct rman  sc_mem_rman;
   68 
   69         /* FCR registers */
   70         int          sc_memrid;
   71         struct resource *sc_memr;
   72 };
   73 
   74 static MALLOC_DEFINE(M_MACIO, "macio", "macio device information");
   75 
   76 static int  macio_probe(device_t);
   77 static int  macio_attach(device_t);
   78 static int  macio_print_child(device_t dev, device_t child);
   79 static void macio_probe_nomatch(device_t, device_t);
   80 static struct   resource *macio_alloc_resource(device_t, device_t, int, int *,
   81                                                u_long, u_long, u_long, u_int);
   82 static int  macio_activate_resource(device_t, device_t, int, int,
   83                                     struct resource *);
   84 static int  macio_deactivate_resource(device_t, device_t, int, int,
   85                                       struct resource *);
   86 static int  macio_release_resource(device_t, device_t, int, int,
   87                                    struct resource *);
   88 static struct resource_list *macio_get_resource_list (device_t, device_t);
   89 static ofw_bus_get_devinfo_t macio_get_devinfo;
   90 
   91 /*
   92  * Bus interface definition
   93  */
   94 static device_method_t macio_methods[] = {
   95         /* Device interface */
   96         DEVMETHOD(device_probe,         macio_probe),
   97         DEVMETHOD(device_attach,        macio_attach),
   98         DEVMETHOD(device_detach,        bus_generic_detach),
   99         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  100         DEVMETHOD(device_suspend,       bus_generic_suspend),
  101         DEVMETHOD(device_resume,        bus_generic_resume),
  102         
  103         /* Bus interface */
  104         DEVMETHOD(bus_print_child,      macio_print_child),
  105         DEVMETHOD(bus_probe_nomatch,    macio_probe_nomatch),
  106         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  107         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),     
  108 
  109         DEVMETHOD(bus_alloc_resource,   macio_alloc_resource),
  110         DEVMETHOD(bus_release_resource, macio_release_resource),
  111         DEVMETHOD(bus_activate_resource, macio_activate_resource),
  112         DEVMETHOD(bus_deactivate_resource, macio_deactivate_resource),
  113         DEVMETHOD(bus_get_resource_list, macio_get_resource_list),      
  114 
  115         DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
  116 
  117         /* ofw_bus interface */
  118         DEVMETHOD(ofw_bus_get_devinfo,  macio_get_devinfo),
  119         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
  120         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
  121         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
  122         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
  123         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
  124 
  125         { 0, 0 }
  126 };
  127 
  128 static driver_t macio_pci_driver = {
  129         "macio",
  130         macio_methods,
  131         sizeof(struct macio_softc)
  132 };
  133 
  134 devclass_t macio_devclass;
  135 
  136 DRIVER_MODULE(macio, pci, macio_pci_driver, macio_devclass, 0, 0);
  137 
  138 /*
  139  * PCI ID search table
  140  */
  141 static struct macio_pci_dev {
  142         u_int32_t  mpd_devid;
  143         char    *mpd_desc;
  144 } macio_pci_devlist[] = {
  145         { 0x0017106b, "Paddington I/O Controller" },
  146         { 0x0022106b, "KeyLargo I/O Controller" },
  147         { 0x0025106b, "Pangea I/O Controller" },
  148         { 0x003e106b, "Intrepid I/O Controller" },
  149         { 0x0041106b, "K2 KeyLargo I/O Controller" },
  150         { 0x004f106b, "Shasta I/O Controller" },
  151         { 0, NULL }
  152 };
  153 
  154 /*
  155  * Devices to exclude from the probe
  156  * XXX some of these may be required in the future...
  157  */
  158 #define MACIO_QUIRK_IGNORE              0x00000001
  159 #define MACIO_QUIRK_CHILD_HAS_INTR      0x00000002
  160 #define MACIO_QUIRK_USE_CHILD_REG       0x00000004
  161 
  162 struct macio_quirk_entry {
  163         const char      *mq_name;
  164         int             mq_quirks;
  165 };
  166 
  167 static struct macio_quirk_entry macio_quirks[] = {
  168         { "escc-legacy",                MACIO_QUIRK_IGNORE },
  169         { "timer",                      MACIO_QUIRK_IGNORE },
  170         { "escc",                       MACIO_QUIRK_CHILD_HAS_INTR },
  171         { "i2s",                        MACIO_QUIRK_CHILD_HAS_INTR | 
  172                                         MACIO_QUIRK_USE_CHILD_REG },
  173         { NULL,                         0 }
  174 };
  175 
  176 static int
  177 macio_get_quirks(const char *name)
  178 {
  179         struct  macio_quirk_entry *mqe;
  180 
  181         for (mqe = macio_quirks; mqe->mq_name != NULL; mqe++)
  182                 if (strcmp(name, mqe->mq_name) == 0)
  183                         return (mqe->mq_quirks);
  184         return (0);
  185 }
  186 
  187 
  188 /*
  189  * Add an interrupt to the dev's resource list if present
  190  */
  191 static void
  192 macio_add_intr(phandle_t devnode, struct macio_devinfo *dinfo)
  193 {
  194         phandle_t iparent;
  195         int     *intr;
  196         int     i, nintr;
  197         int     icells;
  198 
  199         if (dinfo->mdi_ninterrupts >= 6) {
  200                 printf("macio: device has more than 6 interrupts\n");
  201                 return;
  202         }
  203 
  204         if (OF_searchprop(devnode, "#interrupt-cells", &icells, sizeof(icells))
  205             <= 0)
  206                 icells = 1;
  207 
  208         nintr = OF_getprop_alloc(devnode, "interrupts", sizeof(*intr), 
  209                 (void **)&intr);
  210         if (nintr == -1) {
  211                 nintr = OF_getprop_alloc(devnode, "AAPL,interrupts", 
  212                         sizeof(*intr), (void **)&intr);
  213                 if (nintr == -1)
  214                         return;
  215         }
  216 
  217         if (intr[0] == -1)
  218                 return;
  219 
  220         if (OF_getprop(devnode, "interrupt-parent", &iparent, sizeof(iparent))
  221             <= 0)
  222                 panic("Interrupt but no interrupt parent!\n");
  223 
  224         for (i = 0; i < nintr; i+=icells) {
  225                 u_int irq = MAP_IRQ(iparent, intr[i]);
  226 
  227                 resource_list_add(&dinfo->mdi_resources, SYS_RES_IRQ,
  228                     dinfo->mdi_ninterrupts, irq, irq, 1);
  229 
  230                 dinfo->mdi_interrupts[dinfo->mdi_ninterrupts] = irq;
  231                 dinfo->mdi_ninterrupts++;
  232         }
  233 }
  234 
  235 
  236 static void
  237 macio_add_reg(phandle_t devnode, struct macio_devinfo *dinfo)
  238 {
  239         struct  macio_reg *reg;
  240         int     i, nreg;
  241 
  242         nreg = OF_getprop_alloc(devnode, "reg", sizeof(*reg), (void **)&reg);
  243         if (nreg == -1)
  244                 return;
  245 
  246         for (i = 0; i < nreg; i++) {
  247                 resource_list_add(&dinfo->mdi_resources, SYS_RES_MEMORY, i,
  248                     reg[i].mr_base, reg[i].mr_base + reg[i].mr_size,
  249                     reg[i].mr_size);
  250         }
  251 }
  252 
  253 /*
  254  * PCI probe
  255  */
  256 static int
  257 macio_probe(device_t dev)
  258 {
  259         int i;
  260         u_int32_t devid;
  261         
  262         devid = pci_get_devid(dev);
  263         for (i = 0; macio_pci_devlist[i].mpd_desc != NULL; i++) {
  264                 if (devid == macio_pci_devlist[i].mpd_devid) {
  265                         device_set_desc(dev, macio_pci_devlist[i].mpd_desc);
  266                         return (0);
  267                 }
  268         }
  269         
  270         return (ENXIO); 
  271 }
  272 
  273 /*
  274  * PCI attach: scan Open Firmware child nodes, and attach these as children
  275  * of the macio bus
  276  */
  277 static int 
  278 macio_attach(device_t dev)
  279 {
  280         struct macio_softc *sc;
  281         struct macio_devinfo *dinfo;
  282         phandle_t  root;
  283         phandle_t  child;
  284         phandle_t  subchild;
  285         device_t cdev;
  286         u_int reg[3];
  287         int error, quirks;
  288 
  289         sc = device_get_softc(dev);
  290         root = sc->sc_node = ofw_bus_get_node(dev);
  291         
  292         /*
  293          * Locate the device node and it's base address
  294          */
  295         if (OF_getprop(root, "assigned-addresses", 
  296                        reg, sizeof(reg)) < (ssize_t)sizeof(reg)) {
  297                 return (ENXIO);
  298         }
  299 
  300         sc->sc_base = reg[2];
  301         sc->sc_size = MACIO_REG_SIZE;
  302 
  303         sc->sc_memrid = PCIR_BAR(0);
  304         sc->sc_memr = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
  305             &sc->sc_memrid, RF_ACTIVE);
  306 
  307         sc->sc_mem_rman.rm_type = RMAN_ARRAY;
  308         sc->sc_mem_rman.rm_descr = "MacIO Device Memory";
  309         error = rman_init(&sc->sc_mem_rman);
  310         if (error) {
  311                 device_printf(dev, "rman_init() failed. error = %d\n", error);
  312                 return (error);
  313         }
  314         error = rman_manage_region(&sc->sc_mem_rman, 0, sc->sc_size);   
  315         if (error) {
  316                 device_printf(dev,
  317                     "rman_manage_region() failed. error = %d\n", error);
  318                 return (error);
  319         }
  320 
  321         /*
  322          * Iterate through the sub-devices
  323          */
  324         for (child = OF_child(root); child != 0; child = OF_peer(child)) {
  325                 dinfo = malloc(sizeof(*dinfo), M_MACIO, M_WAITOK | M_ZERO);
  326                 if (ofw_bus_gen_setup_devinfo(&dinfo->mdi_obdinfo, child) !=
  327                     0) {
  328                         free(dinfo, M_MACIO);
  329                         continue;
  330                 }
  331                 quirks = macio_get_quirks(dinfo->mdi_obdinfo.obd_name);
  332                 if ((quirks & MACIO_QUIRK_IGNORE) != 0) {
  333                         ofw_bus_gen_destroy_devinfo(&dinfo->mdi_obdinfo);
  334                         free(dinfo, M_MACIO);
  335                         continue;
  336                 }
  337                 resource_list_init(&dinfo->mdi_resources);
  338                 dinfo->mdi_ninterrupts = 0;
  339                 macio_add_intr(child, dinfo);
  340                 if ((quirks & MACIO_QUIRK_USE_CHILD_REG) != 0)
  341                         macio_add_reg(OF_child(child), dinfo);
  342                 else
  343                         macio_add_reg(child, dinfo);
  344                 if ((quirks & MACIO_QUIRK_CHILD_HAS_INTR) != 0)
  345                         for (subchild = OF_child(child); subchild != 0;
  346                             subchild = OF_peer(subchild))
  347                                 macio_add_intr(subchild, dinfo);
  348                 cdev = device_add_child(dev, NULL, -1);
  349                 if (cdev == NULL) {
  350                         device_printf(dev, "<%s>: device_add_child failed\n",
  351                             dinfo->mdi_obdinfo.obd_name);
  352                         resource_list_free(&dinfo->mdi_resources);
  353                         ofw_bus_gen_destroy_devinfo(&dinfo->mdi_obdinfo);
  354                         free(dinfo, M_MACIO);
  355                         continue;
  356                 }
  357                 device_set_ivars(cdev, dinfo);
  358 
  359                 /* Set FCRs to enable some devices */
  360                 if (sc->sc_memr == NULL)
  361                         continue;
  362 
  363                 if (strcmp(ofw_bus_get_name(cdev), "bmac") == 0 ||
  364                     strcmp(ofw_bus_get_compat(cdev), "bmac+") == 0) {
  365                         uint32_t fcr;
  366 
  367                         fcr = bus_read_4(sc->sc_memr, HEATHROW_FCR);
  368 
  369                         fcr |= FCR_ENET_ENABLE & ~FCR_ENET_RESET;
  370                         bus_write_4(sc->sc_memr, HEATHROW_FCR, fcr);
  371                         DELAY(50000);
  372                         fcr |= FCR_ENET_RESET;
  373                         bus_write_4(sc->sc_memr, HEATHROW_FCR, fcr);
  374                         DELAY(50000);
  375                         fcr &= ~FCR_ENET_RESET;
  376                         bus_write_4(sc->sc_memr, HEATHROW_FCR, fcr);
  377                         DELAY(50000);
  378                         
  379                         bus_write_4(sc->sc_memr, HEATHROW_FCR, fcr);
  380                 }
  381         }
  382 
  383         return (bus_generic_attach(dev));
  384 }
  385 
  386 
  387 static int
  388 macio_print_child(device_t dev, device_t child)
  389 {
  390         struct macio_devinfo *dinfo;
  391         struct resource_list *rl;
  392         int retval = 0;
  393 
  394         dinfo = device_get_ivars(child);
  395         rl = &dinfo->mdi_resources;
  396 
  397         retval += bus_print_child_header(dev, child);
  398 
  399         retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx");
  400         retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
  401 
  402         retval += bus_print_child_footer(dev, child);
  403 
  404         return (retval);
  405 }
  406 
  407 
  408 static void
  409 macio_probe_nomatch(device_t dev, device_t child)
  410 {
  411         struct macio_devinfo *dinfo;
  412         struct resource_list *rl;
  413         const char *type;
  414 
  415         if (bootverbose) {
  416                 dinfo = device_get_ivars(child);
  417                 rl = &dinfo->mdi_resources;
  418 
  419                 if ((type = ofw_bus_get_type(child)) == NULL)
  420                         type = "(unknown)";
  421                 device_printf(dev, "<%s, %s>", type, ofw_bus_get_name(child));
  422                 resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx");
  423                 resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
  424                 printf(" (no driver attached)\n");
  425         }
  426 }
  427 
  428 
  429 static struct resource *
  430 macio_alloc_resource(device_t bus, device_t child, int type, int *rid,
  431                      u_long start, u_long end, u_long count, u_int flags)
  432 {
  433         struct          macio_softc *sc;
  434         int             needactivate;
  435         struct          resource *rv;
  436         struct          rman *rm;
  437         u_long          adjstart, adjend, adjcount;
  438         struct          macio_devinfo *dinfo;
  439         struct          resource_list_entry *rle;
  440 
  441         sc = device_get_softc(bus);
  442         dinfo = device_get_ivars(child);
  443 
  444         needactivate = flags & RF_ACTIVE;
  445         flags &= ~RF_ACTIVE;
  446 
  447         switch (type) {
  448         case SYS_RES_MEMORY:
  449         case SYS_RES_IOPORT:
  450                 rle = resource_list_find(&dinfo->mdi_resources, SYS_RES_MEMORY,
  451                     *rid);
  452                 if (rle == NULL) {
  453                         device_printf(bus, "no rle for %s memory %d\n",
  454                             device_get_nameunit(child), *rid);
  455                         return (NULL);
  456                 }
  457 
  458                 if (start < rle->start)
  459                         adjstart = rle->start;
  460                 else if (start > rle->end)
  461                         adjstart = rle->end;
  462                 else
  463                         adjstart = start;
  464 
  465                 if (end < rle->start)
  466                         adjend = rle->start;
  467                 else if (end > rle->end)
  468                         adjend = rle->end;
  469                 else
  470                         adjend = end;
  471 
  472                 adjcount = adjend - adjstart;
  473 
  474                 rm = &sc->sc_mem_rman;
  475                 break;
  476 
  477         case SYS_RES_IRQ:
  478                 /* Check for passthrough from subattachments like macgpio */
  479                 if (device_get_parent(child) != bus)
  480                         return BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
  481                             type, rid, start, end, count, flags);
  482 
  483                 rle = resource_list_find(&dinfo->mdi_resources, SYS_RES_IRQ,
  484                     *rid);
  485                 if (rle == NULL) {
  486                         if (dinfo->mdi_ninterrupts >= 6) {
  487                                 device_printf(bus,
  488                                     "%s has more than 6 interrupts\n",
  489                                     device_get_nameunit(child));
  490                                 return (NULL);
  491                         }
  492                         resource_list_add(&dinfo->mdi_resources, SYS_RES_IRQ,
  493                             dinfo->mdi_ninterrupts, start, start, 1);
  494 
  495                         dinfo->mdi_interrupts[dinfo->mdi_ninterrupts] = start;
  496                         dinfo->mdi_ninterrupts++;
  497                 }
  498 
  499                 return (resource_list_alloc(&dinfo->mdi_resources, bus, child,
  500                     type, rid, start, end, count, flags));
  501 
  502         default:
  503                 device_printf(bus, "unknown resource request from %s\n",
  504                               device_get_nameunit(child));
  505                 return (NULL);
  506         }
  507 
  508         rv = rman_reserve_resource(rm, adjstart, adjend, adjcount, flags,
  509             child);
  510         if (rv == NULL) {
  511                 device_printf(bus,
  512                     "failed to reserve resource %#lx - %#lx (%#lx) for %s\n",
  513                     adjstart, adjend, adjcount, device_get_nameunit(child));
  514                 return (NULL);
  515         }
  516 
  517         rman_set_rid(rv, *rid);
  518 
  519         if (needactivate) {
  520                 if (bus_activate_resource(child, type, *rid, rv) != 0) {
  521                         device_printf(bus,
  522                                       "failed to activate resource for %s\n",
  523                                       device_get_nameunit(child));
  524                         rman_release_resource(rv);
  525                         return (NULL);
  526                 }
  527         }
  528 
  529         return (rv);
  530 }
  531 
  532 
  533 static int
  534 macio_release_resource(device_t bus, device_t child, int type, int rid,
  535                        struct resource *res)
  536 {
  537         if (rman_get_flags(res) & RF_ACTIVE) {
  538                 int error = bus_deactivate_resource(child, type, rid, res);
  539                 if (error)
  540                         return error;
  541         }
  542 
  543         return (rman_release_resource(res));
  544 }
  545 
  546 
  547 static int
  548 macio_activate_resource(device_t bus, device_t child, int type, int rid,
  549                            struct resource *res)
  550 {
  551         struct macio_softc *sc;
  552         void    *p;
  553 
  554         sc = device_get_softc(bus);
  555 
  556         if (type == SYS_RES_IRQ)
  557                 return (bus_activate_resource(bus, type, rid, res));
  558 
  559         if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) {
  560                 p = pmap_mapdev((vm_offset_t)rman_get_start(res) + sc->sc_base,
  561                                 (vm_size_t)rman_get_size(res));
  562                 if (p == NULL)
  563                         return (ENOMEM);
  564                 rman_set_virtual(res, p);
  565                 rman_set_bustag(res, &bs_le_tag);
  566                 rman_set_bushandle(res, (u_long)p);
  567         }
  568 
  569         return (rman_activate_resource(res));
  570 }
  571 
  572 
  573 static int
  574 macio_deactivate_resource(device_t bus, device_t child, int type, int rid,
  575                           struct resource *res)
  576 {
  577         /*
  578          * If this is a memory resource, unmap it.
  579          */
  580         if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) {
  581                 u_int32_t psize;
  582 
  583                 psize = rman_get_size(res);
  584                 pmap_unmapdev((vm_offset_t)rman_get_virtual(res), psize);
  585         }
  586 
  587         return (rman_deactivate_resource(res));
  588 }
  589 
  590 
  591 static struct resource_list *
  592 macio_get_resource_list (device_t dev, device_t child)
  593 {
  594         struct macio_devinfo *dinfo;
  595 
  596         dinfo = device_get_ivars(child);
  597         return (&dinfo->mdi_resources);
  598 }
  599 
  600 static const struct ofw_bus_devinfo *
  601 macio_get_devinfo(device_t dev, device_t child)
  602 {
  603         struct macio_devinfo *dinfo;
  604 
  605         dinfo = device_get_ivars(child);
  606         return (&dinfo->mdi_obdinfo);
  607 }
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FreeBSD/Linux Kernel Cross Reference sys/powerpc/powermac/macio.c

FreeBSD/Linux Kernel Cross Reference
sys/powerpc/powermac/macio.c
