* An inteface for configuring a hardware via u-boot environment.
*
* Copyright (c) 2009 MontaVista Software, Inc.
+ * Copyright 2011 Freescale Semiconductor, Inc.
*
* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
+ * SPDX-License-Identifier: GPL-2.0+
*/
#ifndef HWCONFIG_TEST
return NULL;
}
-const char *cpu_hwconfig __attribute__((weak));
-const char *board_hwconfig __attribute__((weak));
+const char cpu_hwconfig[] __attribute__((weak)) = "";
+const char board_hwconfig[] __attribute__((weak)) = "";
-#define HWCONFIG_PRE_RELOC_BUF_SIZE 128
-
-static const char *__hwconfig(const char *opt, size_t *arglen)
+static const char *__hwconfig(const char *opt, size_t *arglen,
+ const char *env_hwconfig)
{
- const char *env_hwconfig = NULL;
- char buf[HWCONFIG_PRE_RELOC_BUF_SIZE];
+ const char *ret;
- if (gd->flags & GD_FLG_ENV_READY) {
+ /* if we are passed a buffer use it, otherwise try the environment */
+ if (!env_hwconfig) {
+ if (!(gd->flags & GD_FLG_ENV_READY)) {
+ printf("WARNING: Calling __hwconfig without a buffer "
+ "and before environment is ready\n");
+ return NULL;
+ }
env_hwconfig = getenv("hwconfig");
- } else {
- /*
- * Use our own on stack based buffer before relocation to allow
- * accessing longer hwconfig strings that might be in the
- * environment before we've relocated. This is pretty fragile
- * on both the use of stack and if the buffer is big enough.
- * However we will get a warning from getenv_f for the later.
- */
- if ((getenv_f("hwconfig", buf, sizeof(buf))) > 0)
- env_hwconfig = buf;
}
- if (env_hwconfig)
- return hwconfig_parse(env_hwconfig, strlen(env_hwconfig),
- opt, ";", ':', arglen);
-
- if (board_hwconfig)
- return hwconfig_parse(board_hwconfig, strlen(board_hwconfig),
+ if (env_hwconfig) {
+ ret = hwconfig_parse(env_hwconfig, strlen(env_hwconfig),
opt, ";", ':', arglen);
+ if (ret)
+ return ret;
+ }
- if (cpu_hwconfig)
- return hwconfig_parse(cpu_hwconfig, strlen(cpu_hwconfig),
- opt, ";", ':', arglen);
+ ret = hwconfig_parse(board_hwconfig, strlen(board_hwconfig),
+ opt, ";", ':', arglen);
+ if (ret)
+ return ret;
- return NULL;
+ return hwconfig_parse(cpu_hwconfig, strlen(cpu_hwconfig),
+ opt, ";", ':', arglen);
}
/*
- * hwconfig - query if a particular hwconfig option is specified
+ * hwconfig_f - query if a particular hwconfig option is specified
* @opt: a string representing an option
+ * @buf: if non-NULL use this buffer to parse, otherwise try env
*
* This call can be used to find out whether U-Boot should configure
* a particular hardware option.
* that the board file only calls things that are actually used, so
* hwconfig() will always return true result.
*/
-int hwconfig(const char *opt)
+int hwconfig_f(const char *opt, char *buf)
{
- return !!__hwconfig(opt, NULL);
+ return !!__hwconfig(opt, NULL, buf);
}
/*
- * hwconfig_arg - get hwconfig option's argument
+ * hwconfig_arg_f - get hwconfig option's argument
* @opt: a string representing an option
* @arglen: a pointer to an allocated size_t variable
+ * @buf: if non-NULL use this buffer to parse, otherwise try env
*
- * Unlike hwconfig() function, this function returns a pointer to the
+ * Unlike hwconfig_f() function, this function returns a pointer to the
* start of the hwconfig arguments, if option is not found or it has
* no specified arguments, the function returns NULL pointer.
*
* If CONFIG_HWCONFIG is undefined, the function returns "", and
* arglen is set to 0.
*/
-const char *hwconfig_arg(const char *opt, size_t *arglen)
+const char *hwconfig_arg_f(const char *opt, size_t *arglen, char *buf)
{
- return __hwconfig(opt, arglen);
+ return __hwconfig(opt, arglen, buf);
}
/*
- * hwconfig_arg_cmp - compare hwconfig option's argument
+ * hwconfig_arg_cmp_f - compare hwconfig option's argument
* @opt: a string representing an option
* @arg: a string for comparing an option's argument
+ * @buf: if non-NULL use this buffer to parse, otherwise try env
*
- * This call is similar to hwconfig_arg, but instead of returning
+ * This call is similar to hwconfig_arg_f, but instead of returning
* hwconfig argument and its length, it is comparing it to @arg.
*
* Returns non-zero value if @arg matches, 0 otherwise.
* If CONFIG_HWCONFIG is undefined, the function returns a non-zero
* value, i.e. the argument matches.
*/
-int hwconfig_arg_cmp(const char *opt, const char *arg)
+int hwconfig_arg_cmp_f(const char *opt, const char *arg, char *buf)
{
const char *argstr;
size_t arglen;
- argstr = hwconfig_arg(opt, &arglen);
+ argstr = hwconfig_arg_f(opt, &arglen, buf);
if (!argstr || arglen != strlen(arg))
return 0;
}
/*
- * hwconfig_sub - query if a particular hwconfig sub-option is specified
+ * hwconfig_sub_f - query if a particular hwconfig sub-option is specified
* @opt: a string representing an option
* @subopt: a string representing a sub-option
+ * @buf: if non-NULL use this buffer to parse, otherwise try env
*
- * This call is similar to hwconfig(), except that it takes additional
+ * This call is similar to hwconfig_f(), except that it takes additional
* argument @subopt. In this example:
* "dr_usb:mode=peripheral"
* "dr_usb" is an option, "mode" is a sub-option, and "peripheral" is its
* argument.
*/
-int hwconfig_sub(const char *opt, const char *subopt)
+int hwconfig_sub_f(const char *opt, const char *subopt, char *buf)
{
size_t arglen;
const char *arg;
- arg = __hwconfig(opt, &arglen);
+ arg = __hwconfig(opt, &arglen, buf);
if (!arg)
return 0;
return !!hwconfig_parse(arg, arglen, subopt, ",;", '=', NULL);
}
/*
- * hwconfig_subarg - get hwconfig sub-option's argument
+ * hwconfig_subarg_f - get hwconfig sub-option's argument
* @opt: a string representing an option
* @subopt: a string representing a sub-option
* @subarglen: a pointer to an allocated size_t variable
+ * @buf: if non-NULL use this buffer to parse, otherwise try env
*
- * This call is similar to hwconfig_arg(), except that it takes an additional
- * argument @subopt, and so works with sub-options.
+ * This call is similar to hwconfig_arg_f(), except that it takes an
+ * additional argument @subopt, and so works with sub-options.
*/
-const char *hwconfig_subarg(const char *opt, const char *subopt,
- size_t *subarglen)
+const char *hwconfig_subarg_f(const char *opt, const char *subopt,
+ size_t *subarglen, char *buf)
{
size_t arglen;
const char *arg;
- arg = __hwconfig(opt, &arglen);
+ arg = __hwconfig(opt, &arglen, buf);
if (!arg)
return NULL;
return hwconfig_parse(arg, arglen, subopt, ",;", '=', subarglen);
}
/*
- * hwconfig_arg_cmp - compare hwconfig sub-option's argument
+ * hwconfig_arg_cmp_f - compare hwconfig sub-option's argument
* @opt: a string representing an option
* @subopt: a string representing a sub-option
* @subarg: a string for comparing an sub-option's argument
+ * @buf: if non-NULL use this buffer to parse, otherwise try env
*
- * This call is similar to hwconfig_arg_cmp, except that it takes an additional
- * argument @subopt, and so works with sub-options.
+ * This call is similar to hwconfig_arg_cmp_f, except that it takes an
+ * additional argument @subopt, and so works with sub-options.
*/
-int hwconfig_subarg_cmp(const char *opt, const char *subopt, const char *subarg)
+int hwconfig_subarg_cmp_f(const char *opt, const char *subopt,
+ const char *subarg, char *buf)
{
const char *argstr;
size_t arglen;
- argstr = hwconfig_subarg(opt, subopt, &arglen);
+ argstr = hwconfig_subarg_f(opt, subopt, &arglen, buf);
if (!argstr || arglen != strlen(subarg))
return 0;
projects / karo-tx-uboot.git / blobdiff