lebuffer_sbus.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2006 Marius Strobl <marius@FreeBSD.org>
    5  * 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  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/12.0/sys/dev/le/lebuffer_sbus.c 332310 2018-04-08 22:59:34Z gonzo $");
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/bus.h>
   35 #include <sys/kernel.h>
   36 #include <sys/module.h>
   37 #include <sys/resource.h>
   38 #include <sys/rman.h>
   39 
   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 <sparc64/sbus/ofw_sbus.h>
   49 #include <sparc64/sbus/sbusreg.h>
   50 #include <sparc64/sbus/sbusvar.h>
   51 
   52 struct lebuffer_devinfo {
   53         struct ofw_bus_devinfo  ldi_obdinfo;
   54         struct resource_list    ldi_rl;
   55 };
   56 
   57 static devclass_t lebuffer_devclass;
   58 
   59 static device_probe_t lebuffer_probe;
   60 static device_attach_t lebuffer_attach;
   61 static device_detach_t lebuffer_detach;
   62 static bus_print_child_t lebuffer_print_child;
   63 static bus_probe_nomatch_t lebuffer_probe_nomatch;
   64 static bus_get_resource_list_t lebuffer_get_resource_list;
   65 static ofw_bus_get_devinfo_t lebuffer_get_devinfo;
   66 
   67 static struct lebuffer_devinfo *lebuffer_setup_dinfo(device_t, phandle_t);
   68 static void lebuffer_destroy_dinfo(struct lebuffer_devinfo *);
   69 static int lebuffer_print_res(struct lebuffer_devinfo *);
   70 
   71 static device_method_t lebuffer_methods[] = {
   72         /* Device interface */
   73         DEVMETHOD(device_probe,         lebuffer_probe),
   74         DEVMETHOD(device_attach,        lebuffer_attach),
   75         DEVMETHOD(device_detach,        lebuffer_detach),
   76         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   77         DEVMETHOD(device_suspend,       bus_generic_suspend),
   78         DEVMETHOD(device_resume,        bus_generic_resume),
   79 
   80         /* Bus interface */
   81         DEVMETHOD(bus_print_child,      lebuffer_print_child),
   82         DEVMETHOD(bus_probe_nomatch,    lebuffer_probe_nomatch),
   83         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
   84         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   85         DEVMETHOD(bus_alloc_resource,   bus_generic_rl_alloc_resource),
   86         DEVMETHOD(bus_adjust_resource,  bus_generic_adjust_resource),
   87         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
   88         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
   89         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
   90         DEVMETHOD(bus_get_resource_list, lebuffer_get_resource_list),
   91         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
   92 
   93         /* ofw_bus interface */
   94         DEVMETHOD(ofw_bus_get_devinfo,  lebuffer_get_devinfo),
   95         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
   96         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
   97         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
   98         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
   99         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
  100 
  101         { 0, 0 }
  102 };
  103 
  104 DEFINE_CLASS_0(lebuffer, lebuffer_driver, lebuffer_methods, 1);
  105 DRIVER_MODULE(lebuffer, sbus, lebuffer_driver, lebuffer_devclass, 0, 0);
  106 MODULE_DEPEND(lebuffer, sbus, 1, 1, 1);
  107 MODULE_VERSION(lebuffer, 1);
  108 
  109 static int
  110 lebuffer_probe(device_t dev)
  111 {
  112         const char *name;
  113 
  114         name = ofw_bus_get_name(dev);
  115         if (strcmp(name, "lebuffer") == 0) {
  116                 device_set_desc_copy(dev, name);
  117                 return (0);
  118         }
  119         return (ENXIO);
  120 }
  121 
  122 static int
  123 lebuffer_attach(device_t dev)
  124 {
  125         struct lebuffer_devinfo *ldi;
  126         device_t cdev;
  127         phandle_t child;
  128         int children;
  129 
  130         children = 0;
  131         for (child = OF_child(ofw_bus_get_node(dev)); child != 0;
  132             child = OF_peer(child)) {
  133                 if ((ldi = lebuffer_setup_dinfo(dev, child)) == NULL)
  134                         continue;
  135                 if (children != 0) {
  136                         device_printf(dev,
  137                             "<%s>: only one child per buffer supported\n",
  138                             ldi->ldi_obdinfo.obd_name);
  139                         lebuffer_destroy_dinfo(ldi);
  140                         continue;
  141                 }
  142                 if ((cdev = device_add_child(dev, NULL, -1)) == NULL) {
  143                         device_printf(dev, "<%s>: device_add_child failed\n",
  144                             ldi->ldi_obdinfo.obd_name);
  145                         lebuffer_destroy_dinfo(ldi);
  146                         continue;
  147                 }
  148                 device_set_ivars(cdev, ldi);
  149                 children++;
  150         }
  151         return (bus_generic_attach(dev));
  152 }
  153 
  154 static int
  155 lebuffer_detach(device_t dev)
  156 {
  157         device_t *children;
  158         int i, nchildren;
  159 
  160         bus_generic_detach(dev);
  161         if (device_get_children(dev, &children, &nchildren) == 0) {
  162                 for (i = 0; i < nchildren; i++) {
  163                         lebuffer_destroy_dinfo(device_get_ivars(children[i]));
  164                         device_delete_child(dev, children[i]);
  165                 }
  166                 free(children, M_TEMP);
  167         }
  168         return (0);
  169 }
  170 
  171 static struct lebuffer_devinfo *
  172 lebuffer_setup_dinfo(device_t dev, phandle_t node)
  173 {
  174         struct lebuffer_devinfo *ldi;
  175         struct sbus_regs *reg;
  176         uint32_t base, iv, *intr;
  177         int i, nreg, nintr, slot, rslot;
  178 
  179         ldi = malloc(sizeof(*ldi), M_DEVBUF, M_WAITOK | M_ZERO);
  180         if (ofw_bus_gen_setup_devinfo(&ldi->ldi_obdinfo, node) != 0) {
  181                 free(ldi, M_DEVBUF);
  182                 return (NULL);
  183         }
  184         resource_list_init(&ldi->ldi_rl);
  185         slot = -1;
  186         nreg = OF_getprop_alloc_multi(node, "reg", sizeof(*reg), (void **)&reg);
  187         if (nreg == -1) {
  188                 device_printf(dev, "<%s>: incomplete\n",
  189                     ldi->ldi_obdinfo.obd_name);
  190                 goto fail;
  191         }
  192         for (i = 0; i < nreg; i++) {
  193                 base = reg[i].sbr_offset;
  194                 if (SBUS_ABS(base)) {
  195                         rslot = SBUS_ABS_TO_SLOT(base);
  196                         base = SBUS_ABS_TO_OFFSET(base);
  197                 } else
  198                         rslot = reg[i].sbr_slot;
  199                 if (slot != -1 && slot != rslot) {
  200                         device_printf(dev, "<%s>: multiple slots\n",
  201                             ldi->ldi_obdinfo.obd_name);
  202                         OF_prop_free(reg);
  203                         goto fail;
  204                 }
  205                 slot = rslot;
  206 
  207                 resource_list_add(&ldi->ldi_rl, SYS_RES_MEMORY, i, base,
  208                     base + reg[i].sbr_size, reg[i].sbr_size);
  209         }
  210         OF_prop_free(reg);
  211         if (slot != sbus_get_slot(dev)) {
  212                 device_printf(dev, "<%s>: parent and child slot do not match\n",
  213                     ldi->ldi_obdinfo.obd_name);
  214                 goto fail;
  215         }
  216 
  217         /*
  218          * The `interrupts' property contains the SBus interrupt level.
  219          */
  220         nintr = OF_getprop_alloc_multi(node, "interrupts", sizeof(*intr),
  221             (void **)&intr);
  222         if (nintr != -1) {
  223                 for (i = 0; i < nintr; i++) {
  224                         iv = intr[i];
  225                         /*
  226                          * SBus card devices need the slot number encoded into
  227                          * the vector as this is generally not done.
  228                          */
  229                         if ((iv & INTMAP_OBIO_MASK) == 0)
  230                                 iv |= slot << 3;
  231                         /* Set the IGN as appropriate. */
  232                         iv |= sbus_get_ign(dev) << INTMAP_IGN_SHIFT;
  233                         resource_list_add(&ldi->ldi_rl, SYS_RES_IRQ, i,
  234                             iv, iv, 1);
  235                 }
  236                 OF_prop_free(intr);
  237         }
  238         return (ldi);
  239 
  240  fail:
  241         lebuffer_destroy_dinfo(ldi);
  242         return (NULL);
  243 }
  244 
  245 static void
  246 lebuffer_destroy_dinfo(struct lebuffer_devinfo *dinfo)
  247 {
  248 
  249         resource_list_free(&dinfo->ldi_rl);
  250         ofw_bus_gen_destroy_devinfo(&dinfo->ldi_obdinfo);
  251         free(dinfo, M_DEVBUF);
  252 }
  253 
  254 static int
  255 lebuffer_print_child(device_t dev, device_t child)
  256 {
  257         int rv;
  258 
  259         rv = bus_print_child_header(dev, child);
  260         rv += lebuffer_print_res(device_get_ivars(child));
  261         rv += bus_print_child_footer(dev, child);
  262         return (rv);
  263 }
  264 
  265 static void
  266 lebuffer_probe_nomatch(device_t dev, device_t child)
  267 {
  268         const char *type;
  269 
  270         device_printf(dev, "<%s>", ofw_bus_get_name(child));
  271         lebuffer_print_res(device_get_ivars(child));
  272         type = ofw_bus_get_type(child);
  273         printf(" type %s (no driver attached)\n",
  274             type != NULL ? type : "unknown");
  275 }
  276 
  277 static struct resource_list *
  278 lebuffer_get_resource_list(device_t dev, device_t child)
  279 {
  280         struct lebuffer_devinfo *ldi;
  281 
  282         ldi = device_get_ivars(child);
  283         return (&ldi->ldi_rl);
  284 }
  285 
  286 static const struct ofw_bus_devinfo *
  287 lebuffer_get_devinfo(device_t bus, device_t child)
  288 {
  289         struct lebuffer_devinfo *ldi;
  290 
  291         ldi = device_get_ivars(child);
  292         return (&ldi->ldi_obdinfo);
  293 }
  294 
  295 static int
  296 lebuffer_print_res(struct lebuffer_devinfo *ldi)
  297 {
  298         int rv;
  299 
  300         rv = 0;
  301         rv += resource_list_print_type(&ldi->ldi_rl, "mem", SYS_RES_MEMORY,
  302             "%#jx");
  303         rv += resource_list_print_type(&ldi->ldi_rl, "irq", SYS_RES_IRQ, "%jd");
  304         return (rv);
  305 }
Cache object: 30fe0accca12936fbd29d437a6690337
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FreeBSD/Linux Kernel Cross Reference sys/dev/le/lebuffer_sbus.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/le/lebuffer_sbus.c
