static const char *__hwconfig(const char *opt, size_t *arglen)
{
const char *env_hwconfig = NULL;
char buf[HWCONFIG_PRE_RELOC_BUF_SIZE];
if (gd->flags & GD_FLG_ENV_READY) {
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),
opt, ";", ':', arglen);
if (cpu_hwconfig)
return hwconfig_parse(cpu_hwconfig, strlen(cpu_hwconfig),
opt, ";", ':', arglen);
return NULL;
}
static const char *__hwconfig(const char *opt, size_t *arglen,
const char *env_hwconfig)
{
const char *ret;
/* 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 = env_get("hwconfig");
}
if (env_hwconfig) {
ret = hwconfig_parse(env_hwconfig, strlen(env_hwconfig),
opt, ";", ':', arglen);
if (ret)
return ret;
}
ret = hwconfig_parse(board_hwconfig, strlen(board_hwconfig),
opt, ";", ':', arglen);
if (ret)
return ret;
return hwconfig_parse(cpu_hwconfig, strlen(cpu_hwconfig),
opt, ";", ':', arglen);
}
static const char *__hwconfig(const char *opt, size_t *arglen)
{
const char *env_hwconfig = getenv("hwconfig");
if (env_hwconfig)
return hwconfig_parse(env_hwconfig, strlen(env_hwconfig),
opt, ';', ':', arglen);
if (board_hwconfig)
return hwconfig_parse(board_hwconfig, strlen(board_hwconfig),
opt, ';', ':', arglen);
if (cpu_hwconfig)
return hwconfig_parse(cpu_hwconfig, strlen(cpu_hwconfig),
opt, ';', ':', arglen);
return NULL;
}
/*
* hwconfig_sub - query if a particular hwconfig sub-option is specified
* @opt: a string representing an option
* @subopt: a string representing a sub-option
*
* This call is similar to hwconfig(), 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)
{
size_t arglen;
const char *arg;
arg = __hwconfig(opt, &arglen);
if (!arg)
return 0;
return !!hwconfig_parse(arg, arglen, subopt, ",;", '=', NULL);
}
/*
* hwconfig_subarg - 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
*
* This call is similar to hwconfig_arg(), 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)
{
size_t arglen;
const char *arg;
arg = __hwconfig(opt, &arglen);
if (!arg)
return NULL;
return hwconfig_parse(arg, arglen, subopt, ",;", '=', subarglen);
}
