The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/mmc/mmcbr_if.m

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    1 #-
    2 # Copyright (c) 2006 M. Warner Losh
    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 # Portions of this software may have been developed with reference to
   27 # the SD Simplified Specification.  The following disclaimer may apply:
   28 #
   29 # The following conditions apply to the release of the simplified
   30 # specification ("Simplified Specification") by the SD Card Association and
   31 # the SD Group. The Simplified Specification is a subset of the complete SD
   32 # Specification which is owned by the SD Card Association and the SD
   33 # Group. This Simplified Specification is provided on a non-confidential
   34 # basis subject to the disclaimers below. Any implementation of the
   35 # Simplified Specification may require a license from the SD Card
   36 # Association, SD Group, SD-3C LLC or other third parties.
   37 #
   38 # Disclaimers:
   39 #
   40 # The information contained in the Simplified Specification is presented only
   41 # as a standard specification for SD Cards and SD Host/Ancillary products and
   42 # is provided "AS-IS" without any representations or warranties of any
   43 # kind. No responsibility is assumed by the SD Group, SD-3C LLC or the SD
   44 # Card Association for any damages, any infringements of patents or other
   45 # right of the SD Group, SD-3C LLC, the SD Card Association or any third
   46 # parties, which may result from its use. No license is granted by
   47 # implication, estoppel or otherwise under any patent or other rights of the
   48 # SD Group, SD-3C LLC, the SD Card Association or any third party. Nothing
   49 # herein shall be construed as an obligation by the SD Group, the SD-3C LLC
   50 # or the SD Card Association to disclose or distribute any technical
   51 # information, know-how or other confidential information to any third party.
   52 #
   53 # $FreeBSD$
   54 #
   55 
   56 #include <sys/types.h>
   57 #include <dev/mmc/bridge.h>
   58 #include <dev/mmc/mmcreg.h>
   59 
   60 #
   61 # This is the interface that a mmc bridge chip gives to the mmc bus
   62 # that attaches to the mmc bridge.
   63 #
   64 
   65 INTERFACE mmcbr;
   66 
   67 #
   68 # Called by the mmcbus to setup the IO pins correctly, the voltage to use
   69 # for the card, the type of selects, power modes and bus width.
   70 #
   71 METHOD int update_ios {
   72         device_t        brdev;
   73         device_t        reqdev;
   74 };
   75 
   76 #
   77 # Called by the mmcbus or its children to schedule a mmc request.  These
   78 # requests are queued.  Time passes.  The bridge then gets notification
   79 # of the status of request, who then notifies the requesting device via
   80 # the xfer_done mmcbus method.
   81 #
   82 METHOD int request {
   83         device_t        brdev;
   84         device_t        reqdev;
   85         struct mmc_request *req;
   86 };
   87 
   88 #
   89 # Called by mmcbus to get the read only status bits.
   90 #
   91 METHOD int get_ro {
   92         device_t        brdev;
   93         device_t        reqdev;
   94 };
   95 
   96 #
   97 # Claim the current bridge, blocking the current thread until the host
   98 # is no longer busy.
   99 #
  100 METHOD int acquire_host {
  101         device_t        brdev;
  102         device_t        reqdev;
  103 }
  104 
  105 #
  106 # Release the current bridge.
  107 #
  108 METHOD int release_host {
  109         device_t        brdev;
  110         device_t        reqdev;
  111 }

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