lebuffer_sbus.c

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    1 /*-
    2  * Copyright (c) 2006 Marius Strobl <marius@FreeBSD.org>
    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/module.h>
   35 #include <sys/resource.h>
   36 #include <sys/rman.h>
   37 
   38 #include <dev/ofw/ofw_bus.h>
   39 #include <dev/ofw/ofw_bus_subr.h>
   40 #include <dev/ofw/openfirm.h>
   41 
   42 #include <machine/bus.h>
   43 #include <machine/bus_common.h>
   44 #include <machine/resource.h>
   45 
   46 #include <sparc64/sbus/ofw_sbus.h>
   47 #include <sparc64/sbus/sbusreg.h>
   48 #include <sparc64/sbus/sbusvar.h>
   49 
   50 struct lebuffer_devinfo {
   51         struct ofw_bus_devinfo  ldi_obdinfo;
   52         struct resource_list    ldi_rl;
   53 };
   54 
   55 static devclass_t lebuffer_devclass;
   56 
   57 static device_probe_t lebuffer_probe;
   58 static device_attach_t lebuffer_attach;
   59 static device_detach_t lebuffer_detach;
   60 static bus_print_child_t lebuffer_print_child;
   61 static bus_probe_nomatch_t lebuffer_probe_nomatch;
   62 static bus_get_resource_list_t lebuffer_get_resource_list;
   63 static ofw_bus_get_devinfo_t lebuffer_get_devinfo;
   64 
   65 static struct lebuffer_devinfo *lebuffer_setup_dinfo(device_t, phandle_t);
   66 static void lebuffer_destroy_dinfo(struct lebuffer_devinfo *);
   67 static int lebuffer_print_res(struct lebuffer_devinfo *);
   68 
   69 static device_method_t lebuffer_methods[] = {
   70         /* Device interface */
   71         DEVMETHOD(device_probe,         lebuffer_probe),
   72         DEVMETHOD(device_attach,        lebuffer_attach),
   73         DEVMETHOD(device_detach,        lebuffer_detach),
   74         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   75         DEVMETHOD(device_suspend,       bus_generic_suspend),
   76         DEVMETHOD(device_resume,        bus_generic_resume),
   77 
   78         /* Bus interface */
   79         DEVMETHOD(bus_print_child,      lebuffer_print_child),
   80         DEVMETHOD(bus_probe_nomatch,    lebuffer_probe_nomatch),
   81         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
   82         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   83         DEVMETHOD(bus_alloc_resource,   bus_generic_rl_alloc_resource),
   84         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
   85         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
   86         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
   87         DEVMETHOD(bus_get_resource_list, lebuffer_get_resource_list),
   88         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
   89 
   90         /* ofw_bus interface */
   91         DEVMETHOD(ofw_bus_get_devinfo,  lebuffer_get_devinfo),
   92         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
   93         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
   94         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
   95         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
   96         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
   97 
   98         { 0, 0 }
   99 };
  100 
  101 DEFINE_CLASS_0(lebuffer, lebuffer_driver, lebuffer_methods, 1);
  102 DRIVER_MODULE(lebuffer, sbus, lebuffer_driver, lebuffer_devclass, 0, 0);
  103 MODULE_DEPEND(lebuffer, sbus, 1, 1, 1);
  104 MODULE_VERSION(lebuffer, 1);
  105 
  106 static int
  107 lebuffer_probe(device_t dev)
  108 {
  109         const char *name;
  110 
  111         name = ofw_bus_get_name(dev);
  112         if (strcmp(name, "lebuffer") == 0) {
  113                 device_set_desc_copy(dev, name);
  114                 return (0);
  115         }
  116         return (ENXIO);
  117 }
  118 
  119 static int
  120 lebuffer_attach(device_t dev)
  121 {
  122         struct lebuffer_devinfo *ldi;
  123         device_t cdev;
  124         phandle_t child;
  125         int children;
  126 
  127         children = 0;
  128         for (child = OF_child(ofw_bus_get_node(dev)); child != 0;
  129             child = OF_peer(child)) {
  130                 if ((ldi = lebuffer_setup_dinfo(dev, child)) == NULL)
  131                         continue;
  132                 if (children != 0) {
  133                         device_printf(dev,
  134                             "<%s>: only one child per buffer supported\n",
  135                             ldi->ldi_obdinfo.obd_name);
  136                         lebuffer_destroy_dinfo(ldi);
  137                         continue;
  138                 }
  139                 if ((cdev = device_add_child(dev, NULL, -1)) == NULL) {
  140                         device_printf(dev, "<%s>: device_add_child failed\n",
  141                             ldi->ldi_obdinfo.obd_name);
  142                         lebuffer_destroy_dinfo(ldi);
  143                         continue;
  144                 }
  145                 device_set_ivars(cdev, ldi);
  146                 children++;
  147         }
  148         return (bus_generic_attach(dev));
  149 }
  150 
  151 static int
  152 lebuffer_detach(device_t dev)
  153 {
  154         device_t *children;
  155         int i, nchildren;
  156 
  157         bus_generic_detach(dev);
  158         if (device_get_children(dev, &children, &nchildren) == 0) {
  159                 for (i = 0; i < nchildren; i++) {
  160                         lebuffer_destroy_dinfo(device_get_ivars(children[i]));
  161                         device_delete_child(dev, children[i]);
  162                 }
  163                 free(children, M_TEMP);
  164         }
  165         return (0);
  166 }
  167 
  168 static struct lebuffer_devinfo *
  169 lebuffer_setup_dinfo(device_t dev, phandle_t node)
  170 {
  171         struct lebuffer_devinfo *ldi;
  172         struct sbus_regs *reg;
  173         uint32_t base, iv, *intr;
  174         int i, nreg, nintr, slot, rslot;
  175 
  176         ldi = malloc(sizeof(*ldi), M_DEVBUF, M_WAITOK | M_ZERO);
  177         if (ofw_bus_gen_setup_devinfo(&ldi->ldi_obdinfo, node) != 0) {
  178                 free(ldi, M_DEVBUF);
  179                 return (NULL);
  180         }
  181         resource_list_init(&ldi->ldi_rl);
  182         slot = -1;
  183         nreg = OF_getprop_alloc(node, "reg", sizeof(*reg), (void **)&reg);
  184         if (nreg == -1) {
  185                 device_printf(dev, "<%s>: incomplete\n",
  186                     ldi->ldi_obdinfo.obd_name);
  187                 goto fail;
  188         }
  189         for (i = 0; i < nreg; i++) {
  190                 base = reg[i].sbr_offset;
  191                 if (SBUS_ABS(base)) {
  192                         rslot = SBUS_ABS_TO_SLOT(base);
  193                         base = SBUS_ABS_TO_OFFSET(base);
  194                 } else
  195                         rslot = reg[i].sbr_slot;
  196                 if (slot != -1 && slot != rslot) {
  197                         device_printf(dev, "<%s>: multiple slots\n",
  198                             ldi->ldi_obdinfo.obd_name);
  199                         free(reg, M_OFWPROP);
  200                         goto fail;
  201                 }
  202                 slot = rslot;
  203 
  204                 resource_list_add(&ldi->ldi_rl, SYS_RES_MEMORY, i, base,
  205                     base + reg[i].sbr_size, reg[i].sbr_size);
  206         }
  207         free(reg, M_OFWPROP);
  208         if (slot != sbus_get_slot(dev)) {
  209                 device_printf(dev, "<%s>: parent and child slot do not match\n",
  210                     ldi->ldi_obdinfo.obd_name);
  211                 goto fail;
  212         }
  213 
  214         /*
  215          * The `interrupts' property contains the SBus interrupt level.
  216          */
  217         nintr = OF_getprop_alloc(node, "interrupts", sizeof(*intr),
  218             (void **)&intr);
  219         if (nintr != -1) {
  220                 for (i = 0; i < nintr; i++) {
  221                         iv = intr[i];
  222                         /*
  223                          * SBus card devices need the slot number encoded into
  224                          * the vector as this is generally not done.
  225                          */
  226                         if ((iv & INTMAP_OBIO_MASK) == 0)
  227                                 iv |= slot << 3;
  228                         /* Set the IGN as appropriate. */
  229                         iv |= sbus_get_ign(dev) << INTMAP_IGN_SHIFT;
  230                         resource_list_add(&ldi->ldi_rl, SYS_RES_IRQ, i,
  231                             iv, iv, 1);
  232                 }
  233                 free(intr, M_OFWPROP);
  234         }
  235         return (ldi);
  236 
  237  fail:
  238         lebuffer_destroy_dinfo(ldi);
  239         return (NULL);
  240 }
  241 
  242 static void
  243 lebuffer_destroy_dinfo(struct lebuffer_devinfo *dinfo)
  244 {
  245 
  246         resource_list_free(&dinfo->ldi_rl);
  247         ofw_bus_gen_destroy_devinfo(&dinfo->ldi_obdinfo);
  248         free(dinfo, M_DEVBUF);
  249 }
  250 
  251 static int
  252 lebuffer_print_child(device_t dev, device_t child)
  253 {
  254         int rv;
  255 
  256         rv = bus_print_child_header(dev, child);
  257         rv += lebuffer_print_res(device_get_ivars(child));
  258         rv += bus_print_child_footer(dev, child);
  259         return (rv);
  260 }
  261 
  262 static void
  263 lebuffer_probe_nomatch(device_t dev, device_t child)
  264 {
  265         const char *type;
  266 
  267         device_printf(dev, "<%s>", ofw_bus_get_name(child));
  268         lebuffer_print_res(device_get_ivars(child));
  269         type = ofw_bus_get_type(child);
  270         printf(" type %s (no driver attached)\n",
  271             type != NULL ? type : "unknown");
  272 }
  273 
  274 static struct resource_list *
  275 lebuffer_get_resource_list(device_t dev, device_t child)
  276 {
  277         struct lebuffer_devinfo *ldi;
  278 
  279         ldi = device_get_ivars(child);
  280         return (&ldi->ldi_rl);
  281 }
  282 
  283 static const struct ofw_bus_devinfo *
  284 lebuffer_get_devinfo(device_t bus, device_t child)
  285 {
  286         struct lebuffer_devinfo *ldi;
  287 
  288         ldi = device_get_ivars(child);
  289         return (&ldi->ldi_obdinfo);
  290 }
  291 
  292 static int
  293 lebuffer_print_res(struct lebuffer_devinfo *ldi)
  294 {
  295         int rv;
  296 
  297         rv = 0;
  298         rv += resource_list_print_type(&ldi->ldi_rl, "mem", SYS_RES_MEMORY,
  299             "%#lx");
  300         rv += resource_list_print_type(&ldi->ldi_rl, "irq", SYS_RES_IRQ, "%ld");
  301         return (rv);
  302 }
Cache object: 276632a4e8f78b49e3b3c9e8d0311c17
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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
