central.c

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    1 /*-
    2  * Copyright (c) 2003 Jake Burkholder.
    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  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/bus.h>
   33 #include <sys/kernel.h>
   34 #include <sys/malloc.h>
   35 #include <sys/module.h>
   36 
   37 #include <dev/ofw/ofw_bus.h>
   38 #include <dev/ofw/openfirm.h>
   39 
   40 #include <machine/bus.h>
   41 #include <machine/nexusvar.h>
   42 #include <machine/ofw_upa.h>
   43 #include <machine/resource.h>
   44 
   45 #include <sys/rman.h>
   46 
   47 #include <sparc64/sbus/ofw_sbus.h>
   48 
   49 struct central_devinfo {
   50         char                    *cdi_compat;
   51         char                    *cdi_model;
   52         char                    *cdi_name;
   53         char                    *cdi_type;
   54         phandle_t               cdi_node;
   55         struct resource_list    cdi_rl;
   56 };
   57 
   58 struct central_softc {
   59         phandle_t               sc_node;
   60         int                     sc_nrange;
   61         struct sbus_ranges      *sc_ranges;
   62 };
   63 
   64 static device_probe_t central_probe;
   65 static device_attach_t central_attach;
   66 static bus_print_child_t central_print_child;
   67 static bus_probe_nomatch_t central_probe_nomatch;
   68 static bus_alloc_resource_t central_alloc_resource;
   69 static bus_get_resource_list_t central_get_resource_list;
   70 static ofw_bus_get_compat_t central_get_compat;
   71 static ofw_bus_get_model_t central_get_model;
   72 static ofw_bus_get_name_t central_get_name;
   73 static ofw_bus_get_node_t central_get_node;
   74 static ofw_bus_get_type_t central_get_type;
   75 
   76 static device_method_t central_methods[] = {
   77         /* Device interface. */
   78         DEVMETHOD(device_probe,         central_probe),
   79         DEVMETHOD(device_attach,        central_attach),
   80         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   81         DEVMETHOD(device_suspend,       bus_generic_suspend),
   82         DEVMETHOD(device_resume,        bus_generic_resume),
   83 
   84         /* Bus interface. */
   85         DEVMETHOD(bus_print_child,      central_print_child),
   86         DEVMETHOD(bus_probe_nomatch,    central_probe_nomatch),
   87         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
   88         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   89         DEVMETHOD(bus_alloc_resource,   central_alloc_resource),
   90         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
   91         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
   92         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
   93         DEVMETHOD(bus_get_resource_list, central_get_resource_list),
   94         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
   95 
   96         /* ofw_bus interface */
   97         DEVMETHOD(ofw_bus_get_compat,   central_get_compat),
   98         DEVMETHOD(ofw_bus_get_model,    central_get_model),
   99         DEVMETHOD(ofw_bus_get_name,     central_get_name),
  100         DEVMETHOD(ofw_bus_get_node,     central_get_node),
  101         DEVMETHOD(ofw_bus_get_type,     central_get_type),
  102 
  103         { NULL, NULL }
  104 };
  105 
  106 static driver_t central_driver = {
  107         "central",
  108         central_methods,
  109         sizeof(struct central_softc),
  110 };
  111 
  112 static devclass_t central_devclass;
  113 
  114 DRIVER_MODULE(central, nexus, central_driver, central_devclass, 0, 0);
  115 MODULE_DEPEND(fhc, nexus, 1, 1, 1);
  116 MODULE_VERSION(central, 1);
  117 
  118 static int
  119 central_probe(device_t dev)
  120 {
  121 
  122         if (strcmp(nexus_get_name(dev), "central") == 0) {
  123                 device_set_desc(dev, "central");
  124                 return (0);
  125         }
  126         return (ENXIO);
  127 }
  128 
  129 static int
  130 central_attach(device_t dev)
  131 {
  132         struct central_devinfo *cdi;
  133         struct sbus_regs *reg;
  134         struct central_softc *sc;
  135         phandle_t child;
  136         phandle_t node;
  137         bus_addr_t size;
  138         bus_addr_t off;
  139         device_t cdev;
  140         char *name;
  141         int nreg;
  142         int i;
  143 
  144         sc = device_get_softc(dev);
  145         node = nexus_get_node(dev);
  146         sc->sc_node = node;
  147 
  148         sc->sc_nrange = OF_getprop_alloc(node, "ranges",
  149             sizeof(*sc->sc_ranges), (void **)&sc->sc_ranges);
  150         if (sc->sc_nrange == -1) {
  151                 device_printf(dev, "can't get ranges\n");
  152                 return (ENXIO);
  153         }
  154 
  155         for (child = OF_child(node); child != 0; child = OF_peer(child)) {
  156                 if ((OF_getprop_alloc(child, "name", 1, (void **)&name)) == -1)
  157                         continue;
  158                 cdev = device_add_child(dev, NULL, -1);
  159                 if (cdev != NULL) {
  160                         cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
  161                         if (cdi == NULL)
  162                                 continue;
  163                         cdi->cdi_name = name;
  164                         cdi->cdi_node = child;
  165                         OF_getprop_alloc(child, "compatible", 1,
  166                             (void **)&cdi->cdi_compat);
  167                         OF_getprop_alloc(child, "device_type", 1,
  168                             (void **)&cdi->cdi_type);
  169                         OF_getprop_alloc(child, "model", 1,
  170                             (void **)&cdi->cdi_model);
  171                         resource_list_init(&cdi->cdi_rl);
  172                         nreg = OF_getprop_alloc(child, "reg", sizeof(*reg),
  173                             (void **)&reg);
  174                         if (nreg != -1) {
  175                                 for (i = 0; i < nreg; i++) {
  176                                         off = reg[i].sbr_offset;
  177                                         size = reg[i].sbr_size;
  178                                         resource_list_add(&cdi->cdi_rl,
  179                                             SYS_RES_MEMORY, i, off, off + size,
  180                                             size);
  181                                 }
  182                                 free(reg, M_OFWPROP);
  183                         }
  184                         device_set_ivars(cdev, cdi);
  185                 } else
  186                         free(name, M_OFWPROP);
  187         }
  188 
  189         return (bus_generic_attach(dev));
  190 }
  191 
  192 static int
  193 central_print_child(device_t dev, device_t child)
  194 {
  195         struct central_devinfo *cdi;
  196         int rv;
  197 
  198         cdi = device_get_ivars(child);
  199         rv = bus_print_child_header(dev, child);
  200         rv += resource_list_print_type(&cdi->cdi_rl, "mem",
  201             SYS_RES_MEMORY, "%#lx");
  202         rv += bus_print_child_footer(dev, child);
  203         return (rv);
  204 }
  205 
  206 static void
  207 central_probe_nomatch(device_t dev, device_t child)
  208 {
  209         struct central_devinfo *cdi;
  210 
  211         cdi = device_get_ivars(child);
  212         device_printf(dev, "<%s>", cdi->cdi_name);
  213         resource_list_print_type(&cdi->cdi_rl, "mem", SYS_RES_MEMORY, "%#lx");
  214         printf(" type %s (no driver attached)\n",
  215             cdi->cdi_type != NULL ? cdi->cdi_type : "unknown");
  216 }
  217 
  218 static struct resource *
  219 central_alloc_resource(device_t bus, device_t child, int type, int *rid,
  220     u_long start, u_long end, u_long count, u_int flags)
  221 {
  222         struct resource_list *rl;
  223         struct resource_list_entry *rle;
  224         struct central_softc *sc;
  225         struct resource *res;
  226         bus_addr_t coffset;
  227         bus_addr_t cend;
  228         bus_addr_t phys;
  229         int isdefault;
  230         int passthrough;
  231         int i;
  232 
  233         isdefault = (start == 0UL && end == ~0UL);
  234         passthrough = (device_get_parent(child) != bus);
  235         res = NULL;
  236         rle = NULL;
  237         rl = BUS_GET_RESOURCE_LIST(bus, child);
  238         sc = device_get_softc(bus);
  239         switch (type) {
  240         case SYS_RES_IRQ:
  241                 return (resource_list_alloc(rl, bus, child, type, rid, start,
  242                     end, count, flags));
  243         case SYS_RES_MEMORY:
  244                 if (!passthrough) {
  245                         rle = resource_list_find(rl, type, *rid);
  246                         if (rle == NULL)
  247                                 return (NULL);
  248                         if (rle->res != NULL)
  249                                 panic("%s: resource entry is busy", __func__);
  250                         if (isdefault) {
  251                                 start = rle->start;
  252                                 count = ulmax(count, rle->count);
  253                                 end = ulmax(rle->end, start + count - 1);
  254                         }
  255                 }
  256                 for (i = 0; i < sc->sc_nrange; i++) {
  257                         coffset = sc->sc_ranges[i].coffset;
  258                         cend = coffset + sc->sc_ranges[i].size - 1;
  259                         if (start >= coffset && end <= cend) {
  260                                 start -= coffset;
  261                                 end -= coffset;
  262                                 phys = sc->sc_ranges[i].poffset |
  263                                     ((bus_addr_t)sc->sc_ranges[i].pspace << 32);
  264                                 res = bus_generic_alloc_resource(bus, child,
  265                                     type, rid, phys + start, phys + end,
  266                                     count, flags);
  267                                 if (!passthrough)
  268                                         rle->res = res;
  269                                 break;
  270                         }
  271                 }
  272                 break;
  273         }
  274         return (res);
  275 }
  276 
  277 static struct resource_list *
  278 central_get_resource_list(device_t bus, device_t child)
  279 {
  280         struct central_devinfo *cdi;
  281 
  282         cdi = device_get_ivars(child);
  283         return (&cdi->cdi_rl);
  284 }
  285 
  286 static const char *
  287 central_get_compat(device_t bus, device_t dev)
  288 {
  289         struct central_devinfo *dinfo;
  290  
  291         dinfo = device_get_ivars(dev);
  292         return (dinfo->cdi_compat);
  293 }
  294  
  295 static const char *
  296 central_get_model(device_t bus, device_t dev)
  297 {
  298         struct central_devinfo *dinfo;
  299 
  300         dinfo = device_get_ivars(dev);
  301         return (dinfo->cdi_model);
  302 }
  303 
  304 static const char *
  305 central_get_name(device_t bus, device_t dev)
  306 {
  307         struct central_devinfo *dinfo;
  308 
  309         dinfo = device_get_ivars(dev);
  310         return (dinfo->cdi_name);
  311 }
  312 
  313 static phandle_t
  314 central_get_node(device_t bus, device_t dev)
  315 {
  316         struct central_devinfo *dinfo;
  317 
  318         dinfo = device_get_ivars(dev);
  319         return (dinfo->cdi_node);
  320 }
  321 
  322 static const char *
  323 central_get_type(device_t bus, device_t dev)
  324 {
  325         struct central_devinfo *dinfo;
  326 
  327         dinfo = device_get_ivars(dev);
  328         return (dinfo->cdi_type);
  329 }
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FreeBSD/Linux Kernel Cross Reference sys/sparc64/central/central.c

FreeBSD/Linux Kernel Cross Reference
sys/sparc64/central/central.c
