bcma_bhndb.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2015 Landon Fuller <landon@landonf.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  *    without modification.
   13  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
   14  *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
   15  *    redistribution must be conditioned upon including a substantially
   16  *    similar Disclaimer requirement for further binary redistribution.
   17  *
   18  * NO WARRANTY
   19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   21  * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
   22  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
   23  * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
   24  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
   27  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   29  * THE POSSIBILITY OF SUCH DAMAGES.
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD$");
   34 
   35 #include <sys/param.h>
   36 #include <sys/kernel.h>
   37 #include <sys/bus.h>
   38 #include <sys/module.h>
   39 
   40 #include <dev/bhnd/bhnd_ids.h>
   41 #include <dev/bhnd/bhndb/bhndbvar.h>
   42 #include <dev/bhnd/bhndb/bhndb_hwdata.h>
   43 
   44 #include "bcmavar.h"
   45 
   46 #include "bcma_eromreg.h"
   47 #include "bcma_eromvar.h"
   48 
   49 /*
   50  * Supports attachment of bcma(4) bus devices via a bhndb bridge.
   51  */
   52 
   53 static int
   54 bcma_bhndb_probe(device_t dev)
   55 {
   56         const struct bhnd_chipid        *cid;
   57         int                              error;
   58 
   59         /* Defer to default probe implementation */
   60         if ((error = bcma_probe(dev)) > 0)
   61                 return (error);
   62 
   63         /* Check bus type */
   64         cid = BHNDB_GET_CHIPID(device_get_parent(dev), dev);
   65         if (cid->chip_type != BHND_CHIPTYPE_BCMA)
   66                 return (ENXIO);
   67 
   68         /* Set device description */
   69         bhnd_set_default_bus_desc(dev, cid);
   70 
   71         return (error);
   72 }
   73 
   74 static int
   75 bcma_bhndb_attach(device_t dev)
   76 {
   77         int error;
   78 
   79         /* Perform initial attach and enumerate our children. */
   80         if ((error = bcma_attach(dev)))
   81                 goto failed;
   82 
   83         /* Delegate remainder to standard bhnd method implementation */
   84         if ((error = bhnd_generic_attach(dev)))
   85                 goto failed;
   86 
   87         return (0);
   88 
   89 failed:
   90         device_delete_children(dev);
   91         return (error);
   92 }
   93 
   94 static int
   95 bcma_bhndb_suspend_child(device_t dev, device_t child)
   96 {
   97         struct bcma_devinfo     *dinfo;
   98         int                      error;
   99 
  100         if (device_get_parent(child) != dev)
  101                 BUS_SUSPEND_CHILD(device_get_parent(dev), child);
  102 
  103         if (device_is_suspended(child))
  104                 return (EBUSY);
  105 
  106         dinfo = device_get_ivars(child);
  107 
  108         /* Suspend the child */
  109         if ((error = bhnd_generic_br_suspend_child(dev, child)))
  110                 return (error);
  111 
  112         /* Suspend child's agent resource  */
  113         if (dinfo->res_agent != NULL)
  114                 BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev,
  115                     SYS_RES_MEMORY, dinfo->res_agent->res);
  116 
  117         return (0);
  118 }
  119 
  120 static int
  121 bcma_bhndb_resume_child(device_t dev, device_t child)
  122 {
  123         struct bcma_devinfo     *dinfo;
  124         int                      error;
  125 
  126         if (device_get_parent(child) != dev)
  127                 BUS_SUSPEND_CHILD(device_get_parent(dev), child);
  128 
  129         if (!device_is_suspended(child))
  130                 return (EBUSY);
  131 
  132         dinfo = device_get_ivars(child);
  133 
  134         /* Resume child's agent resource  */
  135         if (dinfo->res_agent != NULL) {
  136                 error = BHNDB_RESUME_RESOURCE(device_get_parent(dev), dev,
  137                     SYS_RES_MEMORY, dinfo->res_agent->res);
  138                 if (error)
  139                         return (error);
  140         }
  141 
  142         /* Resume the child */
  143         if ((error = bhnd_generic_br_resume_child(dev, child))) {
  144                 /* On failure, re-suspend the agent resource */
  145                 if (dinfo->res_agent != NULL) {
  146                         BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev,
  147                             SYS_RES_MEMORY, dinfo->res_agent->res);
  148                 }
  149 
  150                 return (error);
  151         }
  152 
  153         return (0);
  154 }
  155 
  156 static device_method_t bcma_bhndb_methods[] = {
  157         /* Device interface */
  158         DEVMETHOD(device_probe,                 bcma_bhndb_probe),
  159         DEVMETHOD(device_attach,                bcma_bhndb_attach),
  160 
  161         /* Bus interface */
  162         DEVMETHOD(bus_suspend_child,            bcma_bhndb_suspend_child),
  163         DEVMETHOD(bus_resume_child,             bcma_bhndb_resume_child),
  164 
  165         DEVMETHOD_END
  166 };
  167 
  168 DEFINE_CLASS_2(bhnd, bcma_bhndb_driver, bcma_bhndb_methods,
  169     sizeof(struct bcma_softc), bhnd_bhndb_driver, bcma_driver);
  170 
  171 DRIVER_MODULE(bcma_bhndb, bhndb, bcma_bhndb_driver, NULL, NULL);
  172 
  173 MODULE_VERSION(bcma_bhndb, 1);
  174 MODULE_DEPEND(bcma_bhndb, bcma, 1, 1, 1);
  175 MODULE_DEPEND(bcma_bhndb, bhnd, 1, 1, 1);
  176 MODULE_DEPEND(bcma_bhndb, bhndb, 1, 1, 1);

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FreeBSD/Linux Kernel Cross Reference sys/dev/bhnd/bcma/bcma_bhndb.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/bhnd/bcma/bcma_bhndb.c