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 # $FreeBSD: releng/6.4/sys/dev/mmc/mmcbr_if.m 164433 2006-11-20 07:16:28Z imp $
   27 #
   28 
   29 #include <sys/types.h>
   30 #include <dev/mmc/bridge.h>
   31 #include <dev/mmc/mmcreg.h>
   32 
   33 #
   34 # This is the interface that a mmc bridge chip gives to the mmc bus
   35 # that attaches to the mmc bridge.
   36 #
   37 
   38 INTERFACE mmcbr;
   39 
   40 #
   41 # Called by the mmcbus to setup the IO pins correctly, the voltage to use
   42 # for the card, the type of selects, power modes and bus width.
   43 #
   44 METHOD int update_ios {
   45         device_t        brdev;
   46         device_t        reqdev;
   47 };
   48 
   49 #
   50 # Called by the mmcbus or its children to schedule a mmc request.  These
   51 # requests are queued.  Time passes.  The bridge then gets notification
   52 # of the status of request, who then notifies the requesting device via
   53 # the xfer_done mmcbus method.
   54 #
   55 METHOD int request {
   56         device_t        brdev;
   57         device_t        reqdev;
   58         struct mmc_request *req;
   59 };
   60 
   61 #
   62 # Called by mmcbus to get the read only status bits.
   63 #
   64 METHOD int get_ro {
   65         device_t        brdev;
   66         device_t        reqdev;
   67 };
   68 
   69 #
   70 # Claim the current bridge, blocking the current thread until the host
   71 # is no longer busy.
   72 #
   73 METHOD int acquire_host {
   74         device_t        brdev;
   75         device_t        reqdev;
   76 }
   77 
   78 #
   79 # Release the current bridge.
   80 #
   81 METHOD int release_host {
   82         device_t        brdev;
   83         device_t        reqdev;
   84 }

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