The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/sparc64/fhc/fhc.c

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    1 /*-
    2  * Copyright (c) 2003 Jake Burkholder.
    3  * Copyright (c) 2005 Marius Strobl <marius@FreeBSD.org>
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, 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 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD$");
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/bus.h>
   34 #include <sys/kernel.h>
   35 #include <sys/malloc.h>
   36 #include <sys/module.h>
   37 #include <sys/pcpu.h>
   38 
   39 #include <dev/led/led.h>
   40 #include <dev/ofw/ofw_bus.h>
   41 #include <dev/ofw/ofw_bus_subr.h>
   42 #include <dev/ofw/openfirm.h>
   43 
   44 #include <machine/bus.h>
   45 #include <machine/bus_common.h>
   46 #include <machine/resource.h>
   47 
   48 #include <sys/rman.h>
   49 
   50 #include <sparc64/fhc/fhcreg.h>
   51 #include <sparc64/sbus/ofw_sbus.h>
   52 
   53 struct fhc_devinfo {
   54         struct ofw_bus_devinfo  fdi_obdinfo;
   55         struct resource_list    fdi_rl;
   56 };
   57 
   58 struct fhc_softc {
   59         struct resource         *sc_memres[FHC_NREG];
   60         int                     sc_nrange;
   61         struct sbus_ranges      *sc_ranges;
   62         int                     sc_ign;
   63         struct cdev             *sc_led_dev;
   64 };
   65 
   66 static device_probe_t fhc_probe;
   67 static device_attach_t fhc_attach;
   68 static bus_print_child_t fhc_print_child;
   69 static bus_probe_nomatch_t fhc_probe_nomatch;
   70 static bus_setup_intr_t fhc_setup_intr;
   71 static bus_alloc_resource_t fhc_alloc_resource;
   72 static bus_get_resource_list_t fhc_get_resource_list;
   73 static ofw_bus_get_devinfo_t fhc_get_devinfo;
   74 
   75 static void fhc_intr_enable(void *);
   76 static void fhc_intr_disable(void *);
   77 static void fhc_intr_eoi(void *);
   78 static void fhc_led_func(void *, int);
   79 static int fhc_print_res(struct fhc_devinfo *);
   80 
   81 static device_method_t fhc_methods[] = {
   82         /* Device interface */
   83         DEVMETHOD(device_probe,         fhc_probe),
   84         DEVMETHOD(device_attach,        fhc_attach),
   85         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   86         DEVMETHOD(device_suspend,       bus_generic_suspend),
   87         DEVMETHOD(device_resume,        bus_generic_resume),
   88 
   89         /* Bus interface */
   90         DEVMETHOD(bus_print_child,      fhc_print_child),
   91         DEVMETHOD(bus_probe_nomatch,    fhc_probe_nomatch),
   92         DEVMETHOD(bus_setup_intr,       fhc_setup_intr),
   93         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   94         DEVMETHOD(bus_alloc_resource,   fhc_alloc_resource),
   95         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
   96         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
   97         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
   98         DEVMETHOD(bus_get_resource_list, fhc_get_resource_list),
   99         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
  100 
  101         /* ofw_bus interface */
  102         DEVMETHOD(ofw_bus_get_devinfo,  fhc_get_devinfo),
  103         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
  104         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
  105         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
  106         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
  107         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
  108 
  109         { NULL, NULL }
  110 };
  111 
  112 static driver_t fhc_driver = {
  113         "fhc",
  114         fhc_methods,
  115         sizeof(struct fhc_softc),
  116 };
  117 
  118 static devclass_t fhc_devclass;
  119 
  120 DRIVER_MODULE(fhc, central, fhc_driver, fhc_devclass, 0, 0);
  121 DRIVER_MODULE(fhc, nexus, fhc_driver, fhc_devclass, 0, 0);
  122 
  123 static const struct intr_controller fhc_ic = {
  124         fhc_intr_enable,
  125         fhc_intr_disable,
  126         fhc_intr_eoi
  127 };
  128 
  129 struct fhc_icarg {
  130         struct fhc_softc        *fica_sc;
  131         struct resource         *fica_memres;
  132 };
  133 
  134 static int
  135 fhc_probe(device_t dev)
  136 {
  137 
  138         if (strcmp(ofw_bus_get_name(dev), "fhc") == 0) {
  139                 device_set_desc(dev, "fhc");
  140                 return (0);
  141         }
  142         return (ENXIO);
  143 }
  144 
  145 static int
  146 fhc_attach(device_t dev)
  147 {
  148         char ledname[sizeof("boardXX")];
  149         struct fhc_devinfo *fdi;
  150         struct fhc_icarg *fica;
  151         struct fhc_softc *sc;
  152         struct sbus_regs *reg;
  153         phandle_t child;
  154         phandle_t node;
  155         device_t cdev;
  156         uint32_t board;
  157         uint32_t ctrl;
  158         uint32_t *intr;
  159         uint32_t iv;
  160         char *name;
  161         int central;
  162         int error;
  163         int i;
  164         int nintr;
  165         int nreg;
  166         int rid;
  167 
  168         sc = device_get_softc(dev);
  169         node = ofw_bus_get_node(dev);
  170 
  171         central = 0;
  172         if (strcmp(device_get_name(device_get_parent(dev)), "central") == 0)
  173                 central = 1;
  174 
  175         for (i = 0; i < FHC_NREG; i++) {
  176                 rid = i;
  177                 sc->sc_memres[i] = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
  178                     &rid, RF_ACTIVE);
  179                 if (sc->sc_memres[i] == NULL) {
  180                         device_printf(dev, "cannot allocate resource %d\n", i);
  181                         error = ENXIO;
  182                         goto fail_memres;
  183                 }
  184         }
  185 
  186         if (central != 0) {
  187                 board = bus_read_4(sc->sc_memres[FHC_INTERNAL], FHC_BSR);
  188                 board = ((board >> 16) & 0x1) | ((board >> 12) & 0xe);
  189         } else {
  190                 if (OF_getprop(node, "board#", &board, sizeof(board)) == -1) {
  191                         device_printf(dev, "cannot get board number\n");
  192                         error = ENXIO;
  193                         goto fail_memres;
  194                 }
  195         }
  196 
  197         device_printf(dev, "board %d, ", board);
  198         if (OF_getprop_alloc(node, "board-model", 1, (void **)&name) != -1) {
  199                 printf("model %s\n", name);
  200                 free(name, M_OFWPROP);
  201         } else
  202                 printf("model unknown\n");
  203 
  204         for (i = FHC_FANFAIL; i <= FHC_TOD; i++) {
  205                 bus_write_4(sc->sc_memres[i], FHC_ICLR, 0x0);
  206                 (void)bus_read_4(sc->sc_memres[i], FHC_ICLR);
  207         }
  208 
  209         sc->sc_ign = board << 1;
  210         bus_write_4(sc->sc_memres[FHC_IGN], 0x0, sc->sc_ign);
  211         sc->sc_ign = bus_read_4(sc->sc_memres[FHC_IGN], 0x0);
  212 
  213         ctrl = bus_read_4(sc->sc_memres[FHC_INTERNAL], FHC_CTRL);
  214         if (central == 0)
  215                 ctrl |= FHC_CTRL_IXIST;
  216         ctrl &= ~(FHC_CTRL_AOFF | FHC_CTRL_BOFF | FHC_CTRL_SLINE);
  217         bus_write_4(sc->sc_memres[FHC_INTERNAL], FHC_CTRL, ctrl);
  218         (void)bus_read_4(sc->sc_memres[FHC_INTERNAL], FHC_CTRL);
  219 
  220         sc->sc_nrange = OF_getprop_alloc(node, "ranges",
  221             sizeof(*sc->sc_ranges), (void **)&sc->sc_ranges);
  222         if (sc->sc_nrange == -1) {
  223                 device_printf(dev, "cannot get ranges\n");
  224                 error = ENXIO;
  225                 goto fail_memres;
  226         }
  227 
  228         /*
  229          * Apparently only the interrupt controller of boards hanging off
  230          * of central(4) is indented to be used, otherwise we would have
  231          * conflicts registering the interrupt controllers for all FHC
  232          * boards as the board number and thus the IGN isn't unique.
  233          */
  234         if (central == 1) {
  235                 /*
  236                  * Hunt through all the interrupt mapping regs and register
  237                  * our interrupt controller for the corresponding interrupt
  238                  * vectors.
  239                  */
  240                 for (i = FHC_FANFAIL; i <= FHC_TOD; i++) {
  241                         fica = malloc(sizeof(*fica), M_DEVBUF, M_NOWAIT);
  242                         if (fica == NULL)
  243                                 panic("%s: could not allocate interrupt "
  244                                     "controller argument", __func__);
  245                         fica->fica_sc = sc;
  246                         fica->fica_memres = sc->sc_memres[i];
  247 #ifdef FHC_DEBUG
  248                         device_printf(dev, "intr map %d: %#lx, clr: %#lx\n", i,
  249                             (u_long)bus_read_4(fica->fica_memres, FHC_IMAP),
  250                             (u_long)bus_read_4(fica->fica_memres, FHC_ICLR));
  251 #endif
  252                         /*
  253                          * XXX we only pick the INO rather than the INR
  254                          * from the IMR since the firmware may not provide
  255                          * the IGN and the IGN is constant for all devices
  256                          * on that FireHose controller.
  257                          */
  258                         if (intr_controller_register(INTMAP_VEC(sc->sc_ign,
  259                             INTINO(bus_read_4(fica->fica_memres, FHC_IMAP))),
  260                             &fhc_ic, fica) != 0)
  261                                 panic("%s: could not register interrupt "
  262                                     "controller for map %d", __func__, i);
  263                 }
  264         } else {
  265                 snprintf(ledname, sizeof(ledname), "board%d", board);
  266                 sc->sc_led_dev = led_create(fhc_led_func, sc, ledname);
  267         }
  268 
  269         for (child = OF_child(node); child != 0; child = OF_peer(child)) {
  270                 fdi = malloc(sizeof(*fdi), M_DEVBUF, M_WAITOK | M_ZERO);
  271                 if (ofw_bus_gen_setup_devinfo(&fdi->fdi_obdinfo, child) != 0) {
  272                         free(fdi, M_DEVBUF);
  273                         continue;
  274                 }
  275                 nreg = OF_getprop_alloc(child, "reg", sizeof(*reg),
  276                     (void **)&reg);
  277                 if (nreg == -1) {
  278                         device_printf(dev, "<%s>: incomplete\n",
  279                             fdi->fdi_obdinfo.obd_name);
  280                         ofw_bus_gen_destroy_devinfo(&fdi->fdi_obdinfo);
  281                         free(fdi, M_DEVBUF);
  282                         continue;
  283                 }
  284                 resource_list_init(&fdi->fdi_rl);
  285                 for (i = 0; i < nreg; i++)
  286                         resource_list_add(&fdi->fdi_rl, SYS_RES_MEMORY, i,
  287                             reg[i].sbr_offset, reg[i].sbr_offset +
  288                             reg[i].sbr_size, reg[i].sbr_size);
  289                 free(reg, M_OFWPROP);
  290                 if (central == 1) {
  291                         nintr = OF_getprop_alloc(child, "interrupts",
  292                             sizeof(*intr), (void **)&intr);
  293                         if (nintr != -1) {
  294                                 for (i = 0; i < nintr; i++) {
  295                                         iv = INTMAP_VEC(sc->sc_ign, intr[i]);
  296                                         resource_list_add(&fdi->fdi_rl,
  297                                             SYS_RES_IRQ, i, iv, iv, 1);
  298                                 }
  299                                 free(intr, M_OFWPROP);
  300                         }
  301                 }
  302                 cdev = device_add_child(dev, NULL, -1);
  303                 if (cdev == NULL) {
  304                         device_printf(dev, "<%s>: device_add_child failed\n",
  305                             fdi->fdi_obdinfo.obd_name);
  306                         resource_list_free(&fdi->fdi_rl);
  307                         ofw_bus_gen_destroy_devinfo(&fdi->fdi_obdinfo);
  308                         free(fdi, M_DEVBUF);
  309                         continue;
  310                 }
  311                 device_set_ivars(cdev, fdi);
  312         }
  313 
  314         return (bus_generic_attach(dev));
  315 
  316  fail_memres:
  317         for (i = 0; i < FHC_NREG; i++)
  318                 if (sc->sc_memres[i] != NULL)
  319                         bus_release_resource(dev, SYS_RES_MEMORY,
  320                             rman_get_rid(sc->sc_memres[i]), sc->sc_memres[i]);
  321         return (error);
  322 }
  323 
  324 static int
  325 fhc_print_child(device_t dev, device_t child)
  326 {
  327         int rv;
  328 
  329         rv = bus_print_child_header(dev, child);
  330         rv += fhc_print_res(device_get_ivars(child));
  331         rv += bus_print_child_footer(dev, child);
  332         return (rv);
  333 }
  334 
  335 static void
  336 fhc_probe_nomatch(device_t dev, device_t child)
  337 {
  338         const char *type;
  339 
  340         device_printf(dev, "<%s>", ofw_bus_get_name(child));
  341         fhc_print_res(device_get_ivars(child));
  342         type = ofw_bus_get_type(child);
  343         printf(" type %s (no driver attached)\n",
  344             type != NULL ? type : "unknown");
  345 }
  346 
  347 static void
  348 fhc_intr_enable(void *arg)
  349 {
  350         struct intr_vector *iv = arg;
  351         struct fhc_icarg *fica = iv->iv_icarg;
  352 
  353         bus_write_4(fica->fica_memres, FHC_IMAP,
  354             INTMAP_ENABLE(iv->iv_vec, iv->iv_mid));
  355         (void)bus_read_4(fica->fica_memres, FHC_IMAP);
  356 }
  357 
  358 static void
  359 fhc_intr_disable(void *arg)
  360 {
  361         struct intr_vector *iv = arg;
  362         struct fhc_icarg *fica = iv->iv_icarg;
  363 
  364         bus_write_4(fica->fica_memres, FHC_IMAP, iv->iv_vec);
  365         (void)bus_read_4(fica->fica_memres, FHC_IMAP);
  366 }
  367 
  368 static void
  369 fhc_intr_eoi(void *arg)
  370 {
  371         struct intr_vector *iv = arg;
  372         struct fhc_icarg *fica = iv->iv_icarg;
  373 
  374         bus_write_4(fica->fica_memres, FHC_ICLR, 0x0);
  375         (void)bus_read_4(fica->fica_memres, FHC_ICLR);
  376 }
  377 
  378 static int
  379 fhc_setup_intr(device_t bus, device_t child, struct resource *r, int flags,
  380     driver_filter_t *filt, driver_intr_t *func, void *arg, void **cookiep)
  381 {
  382         struct fhc_softc *sc;
  383         u_long vec;
  384 
  385         sc = device_get_softc(bus);
  386         /*
  387          * Make sure the vector is fully specified and we registered
  388          * our interrupt controller for it.
  389          */
  390         vec = rman_get_start(r);
  391         if (INTIGN(vec) != sc->sc_ign || intr_vectors[vec].iv_ic != &fhc_ic) {
  392                 device_printf(bus, "invalid interrupt vector 0x%lx\n", vec);
  393                 return (EINVAL);
  394         }
  395         return (bus_generic_setup_intr(bus, child, r, flags, filt, func,
  396             arg, cookiep));
  397 }
  398 
  399 static struct resource *
  400 fhc_alloc_resource(device_t bus, device_t child, int type, int *rid,
  401     u_long start, u_long end, u_long count, u_int flags)
  402 {
  403         struct resource_list *rl;
  404         struct resource_list_entry *rle;
  405         struct fhc_softc *sc;
  406         struct resource *res;
  407         bus_addr_t coffset;
  408         bus_addr_t cend;
  409         bus_addr_t phys;
  410         int isdefault;
  411         int passthrough;
  412         int i;
  413 
  414         isdefault = (start == 0UL && end == ~0UL);
  415         passthrough = (device_get_parent(child) != bus);
  416         res = NULL;
  417         rle = NULL;
  418         rl = BUS_GET_RESOURCE_LIST(bus, child);
  419         sc = device_get_softc(bus);
  420         switch (type) {
  421         case SYS_RES_IRQ:
  422                 return (resource_list_alloc(rl, bus, child, type, rid, start,
  423                     end, count, flags));
  424         case SYS_RES_MEMORY:
  425                 if (!passthrough) {
  426                         rle = resource_list_find(rl, type, *rid);
  427                         if (rle == NULL)
  428                                 return (NULL);
  429                         if (rle->res != NULL)
  430                                 panic("%s: resource entry is busy", __func__);
  431                         if (isdefault) {
  432                                 start = rle->start;
  433                                 count = ulmax(count, rle->count);
  434                                 end = ulmax(rle->end, start + count - 1);
  435                         }
  436                 }
  437                 for (i = 0; i < sc->sc_nrange; i++) {
  438                         coffset = sc->sc_ranges[i].coffset;
  439                         cend = coffset + sc->sc_ranges[i].size - 1;
  440                         if (start >= coffset && end <= cend) {
  441                                 start -= coffset;
  442                                 end -= coffset;
  443                                 phys = sc->sc_ranges[i].poffset |
  444                                     ((bus_addr_t)sc->sc_ranges[i].pspace << 32);
  445                                 res = bus_generic_alloc_resource(bus, child,
  446                                     type, rid, phys + start, phys + end,
  447                                     count, flags);
  448                                 if (!passthrough)
  449                                         rle->res = res;
  450                                 break;
  451                         }
  452                 }
  453                 break;
  454         }
  455         return (res);
  456 }
  457 
  458 static struct resource_list *
  459 fhc_get_resource_list(device_t bus, device_t child)
  460 {
  461         struct fhc_devinfo *fdi;
  462 
  463         fdi = device_get_ivars(child);
  464         return (&fdi->fdi_rl);
  465 }
  466 
  467 static const struct ofw_bus_devinfo *
  468 fhc_get_devinfo(device_t bus, device_t child)
  469 {
  470         struct fhc_devinfo *fdi;
  471 
  472         fdi = device_get_ivars(child);
  473         return (&fdi->fdi_obdinfo);
  474 }
  475 
  476 static void
  477 fhc_led_func(void *arg, int onoff)
  478 {
  479         struct fhc_softc *sc;
  480         uint32_t ctrl;
  481 
  482         sc = (struct fhc_softc *)arg;
  483 
  484         ctrl = bus_read_4(sc->sc_memres[FHC_INTERNAL], FHC_CTRL);
  485         if (onoff)
  486                 ctrl |= FHC_CTRL_RLED;
  487         else
  488                 ctrl &= ~FHC_CTRL_RLED;
  489         ctrl &= ~(FHC_CTRL_AOFF | FHC_CTRL_BOFF | FHC_CTRL_SLINE);
  490         bus_write_4(sc->sc_memres[FHC_INTERNAL], FHC_CTRL, ctrl);
  491         (void)bus_read_4(sc->sc_memres[FHC_INTERNAL], FHC_CTRL);
  492 }
  493 
  494 static int
  495 fhc_print_res(struct fhc_devinfo *fdi)
  496 {
  497         int rv;
  498 
  499         rv = 0;
  500         rv += resource_list_print_type(&fdi->fdi_rl, "mem", SYS_RES_MEMORY,
  501             "%#lx");
  502         rv += resource_list_print_type(&fdi->fdi_rl, "irq", SYS_RES_IRQ, "%ld");
  503         return (rv);
  504 }

Cache object: 38689dbb6c50e7b21022774e82bd65cd


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