include/hwconfig.h

   1 /*
   2  * An inteface for configuring a hardware via u-boot environment.
   3  *
   4  * Copyright (c) 2009  MontaVista Software, Inc.
   5  * Copyright 2011 Freescale Semiconductor, Inc.
   6  *
   7  * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  */
  14
  15 #ifndef _HWCONFIG_H
  16 #define _HWCONFIG_H
  17
  18 #include <linux/types.h>
  19 #include <asm/errno.h>
  20
  21 #ifdef CONFIG_HWCONFIG
  22
  23 extern int hwconfig_f(const char *opt, char *buf);
  24 extern const char *hwconfig_arg_f(const char *opt, size_t *arglen, char *buf);
  25 extern int hwconfig_arg_cmp_f(const char *opt, const char *arg, char *buf);
  26 extern int hwconfig_sub_f(const char *opt, const char *subopt, char *buf);
  27 extern const char *hwconfig_subarg_f(const char *opt, const char *subopt,
  28                                      size_t *subarglen, char *buf);
  29 extern int hwconfig_subarg_cmp_f(const char *opt, const char *subopt,
  30                                  const char *subarg, char *buf);
  31 #else
  32
  33 static inline int hwconfig_f(const char *opt, char *buf)
  34 {
  35         return -ENOSYS;
  36 }
  37
  38 static inline const char *hwconfig_arg_f(const char *opt, size_t *arglen,
  39                                          char *buf)
  40 {
  41         *arglen = 0;
  42         return "";
  43 }
  44
  45 static inline int hwconfig_arg_cmp_f(const char *opt, const char *arg,
  46                                      char *buf)
  47 {
  48         return -ENOSYS;
  49 }
  50
  51 static inline int hwconfig_sub_f(const char *opt, const char *subopt, char *buf)
  52 {
  53         return -ENOSYS;
  54 }
  55
  56 static inline const char *hwconfig_subarg_f(const char *opt, const char *subopt,
  57                                             size_t *subarglen, char *buf)
  58 {
  59         *subarglen = 0;
  60         return "";
  61 }
  62
  63 static inline int hwconfig_subarg_cmp_f(const char *opt, const char *subopt,
  64                                         const char *subarg, char *buf)
  65 {
  66         return -ENOSYS;
  67 }
  68
  69 #endif /* CONFIG_HWCONFIG */
  70
  71 static inline int hwconfig(const char *opt)
  72 {
  73         return hwconfig_f(opt, NULL);
  74 }
  75
  76 static inline const char *hwconfig_arg(const char *opt, size_t *arglen)
  77 {
  78         return hwconfig_arg_f(opt, arglen, NULL);
  79 }
  80
  81 static inline int hwconfig_arg_cmp(const char *opt, const char *arg)
  82 {
  83         return hwconfig_arg_cmp_f(opt, arg, NULL);
  84 }
  85
  86 static inline int hwconfig_sub(const char *opt, const char *subopt)
  87 {
  88         return hwconfig_sub_f(opt, subopt, NULL);
  89 }
  90
  91 static inline const char *hwconfig_subarg(const char *opt, const char *subopt,
  92                                           size_t *subarglen)
  93 {
  94         return hwconfig_subarg_f(opt, subopt, subarglen, NULL);
  95 }
  96
  97 static inline int hwconfig_subarg_cmp(const char *opt, const char *subopt,
  98                                       const char *subarg)
  99 {
 100         return hwconfig_subarg_cmp_f(opt, subopt, subarg, NULL);
 101 }
 102
 103 #endif /* _HWCONFIG_H */