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     1 #-
    2 # Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org>
    3 #
    4 # Redistribution and use in source and binary forms, with or without
    5 # modification, are permitted provided that the following conditions
    6 # are met:
    7 # 1. Redistributions of source code must retain the above copyright
    8 #    notice, this list of conditions and the following disclaimer.
    9 # 2. Redistributions in binary form must reproduce the above copyright
   10 #    notice, this list of conditions and the following disclaimer in the
   11 #    documentation and/or other materials provided with the distribution.
   12 #
   13 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   14 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   15 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   16 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   17 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   18 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   19 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   20 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   21 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   22 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   23 # SUCH DAMAGE.
   24 #
   25 # $FreeBSD$
   26 #
   27 
   28 INTERFACE nvmem;
   29 
   30 #
   31 # Default implementations of some methods.
   32 #
   33 CODE {
   34         static int
   35         null_nvmem_read(device_t dev __unused, uint32_t offset __unused, uint32_t size __unused, uint8_t *buffer __unused)
   36         {
   37 
   38                 return (ENXIO);
   39         }
   40 
   41         static int
   42         null_nvmem_write(device_t dev __unused, uint32_t offset __unused, uint32_t size __unused, uint8_t *buffer __unused)
   43         {
   44 
   45                 return (ENXIO);
   46         }
   47 };
   48 
   49 #
   50 # Read
   51 #
   52 METHOD int read {
   53         device_t dev;
   54         uint32_t offset;
   55         uint32_t size;
   56         uint8_t *buffer;
   57 } DEFAULT null_nvmem_read;
   58 
   59 #
   60 # Write
   61 #
   62 METHOD int write {
   63         device_t dev;
   64         uint32_t offset;
   65         uint32_t size;
   66         uint8_t *buffer;
   67 } DEFAULT null_nvmem_write;
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