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author | H. Nikolaus Schaller <hns@goldelico.com> | 2012-03-26 20:55:28 +0200 |
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committer | H. Nikolaus Schaller <hns@goldelico.com> | 2012-03-26 20:55:28 +0200 |
commit | 92988a21ad4c4c9504295ccb580c9f806134471b (patch) | |
tree | 5effc9f14170112450de05c67dafbe8d5034d595 /common/hwconfig.c | |
parent | ca2b506783b676c95762c54ea24dcfdaae1947c9 (diff) | |
download | bootable_bootloader_goldelico_gta04-92988a21ad4c4c9504295ccb580c9f806134471b.zip bootable_bootloader_goldelico_gta04-92988a21ad4c4c9504295ccb580c9f806134471b.tar.gz bootable_bootloader_goldelico_gta04-92988a21ad4c4c9504295ccb580c9f806134471b.tar.bz2 |
added boot script files to repository
Diffstat (limited to 'common/hwconfig.c')
-rw-r--r-- | common/hwconfig.c | 288 |
1 files changed, 0 insertions, 288 deletions
diff --git a/common/hwconfig.c b/common/hwconfig.c deleted file mode 100644 index e47d4d7..0000000 --- a/common/hwconfig.c +++ /dev/null @@ -1,288 +0,0 @@ -/* - * 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. - */ - -#ifndef HWCONFIG_TEST -#include <config.h> -#include <common.h> -#include <exports.h> -#include <hwconfig.h> -#include <linux/types.h> -#include <linux/string.h> -#else -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <assert.h> -#define min(a, b) (((a) < (b)) ? (a) : (b)) -#endif /* HWCONFIG_TEST */ - -DECLARE_GLOBAL_DATA_PTR; - -static const char *hwconfig_parse(const char *opts, size_t maxlen, - const char *opt, char *stopchs, char eqch, - size_t *arglen) -{ - size_t optlen = strlen(opt); - char *str; - const char *start = opts; - const char *end; - -next: - str = strstr(opts, opt); - end = str + optlen; - if (end - start > maxlen) - return NULL; - - if (str && (str == opts || strpbrk(str - 1, stopchs) == str - 1) && - (strpbrk(end, stopchs) == end || *end == eqch || - *end == '\0')) { - const char *arg_end; - - if (!arglen) - return str; - - if (*end != eqch) - return NULL; - - arg_end = strpbrk(str, stopchs); - if (!arg_end) - *arglen = min(maxlen, strlen(str)) - optlen - 1; - else - *arglen = arg_end - end - 1; - - return end + 1; - } else if (str) { - opts = end; - goto next; - } - return NULL; -} - -const char cpu_hwconfig[] __attribute__((weak)) = ""; -const char board_hwconfig[] __attribute__((weak)) = ""; - -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 = getenv("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); -} - -/* - * 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. - * - * Returns non-zero value if the hardware option can be used and thus - * should be configured, 0 otherwise. - * - * This function also returns non-zero value if CONFIG_HWCONFIG is - * undefined. - * - * Returning non-zero value without CONFIG_HWCONFIG has its crucial - * purpose: the hwconfig() call should be a "transparent" interface, - * e.g. if a board doesn't need hwconfig facility, then we assume - * that the board file only calls things that are actually used, so - * hwconfig() will always return true result. - */ -int hwconfig_f(const char *opt, char *buf) -{ - return !!__hwconfig(opt, NULL, buf); -} - -/* - * 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_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_f(const char *opt, size_t *arglen, char *buf) -{ - return __hwconfig(opt, arglen, buf); -} - -/* - * 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_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_f(const char *opt, const char *arg, char *buf) -{ - const char *argstr; - size_t arglen; - - argstr = hwconfig_arg_f(opt, &arglen, buf); - if (!argstr || arglen != strlen(arg)) - return 0; - - return !strncmp(argstr, arg, arglen); -} - -/* - * 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_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_f(const char *opt, const char *subopt, char *buf) -{ - size_t arglen; - const char *arg; - - arg = __hwconfig(opt, &arglen, buf); - if (!arg) - return 0; - return !!hwconfig_parse(arg, arglen, subopt, ",;", '=', NULL); -} - -/* - * 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_f(), except that it takes an - * additional argument @subopt, and so works with sub-options. - */ -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, buf); - if (!arg) - return NULL; - return hwconfig_parse(arg, arglen, subopt, ",;", '=', subarglen); -} - -/* - * 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_f, except that it takes an - * additional argument @subopt, and so works with sub-options. - */ -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_f(opt, subopt, &arglen, buf); - if (!argstr || arglen != strlen(subarg)) - return 0; - - return !strncmp(argstr, subarg, arglen); -} - -#ifdef HWCONFIG_TEST -int main() -{ - const char *ret; - size_t len; - - setenv("hwconfig", "key1:subkey1=value1,subkey2=value2;key2:value3;;;;" - "key3;:,:=;key4", 1); - - ret = hwconfig_arg("key1", &len); - printf("%zd %.*s\n", len, (int)len, ret); - assert(len == 29); - assert(hwconfig_arg_cmp("key1", "subkey1=value1,subkey2=value2")); - assert(!strncmp(ret, "subkey1=value1,subkey2=value2", len)); - - ret = hwconfig_subarg("key1", "subkey1", &len); - printf("%zd %.*s\n", len, (int)len, ret); - assert(len == 6); - assert(hwconfig_subarg_cmp("key1", "subkey1", "value1")); - assert(!strncmp(ret, "value1", len)); - - ret = hwconfig_subarg("key1", "subkey2", &len); - printf("%zd %.*s\n", len, (int)len, ret); - assert(len == 6); - assert(hwconfig_subarg_cmp("key1", "subkey2", "value2")); - assert(!strncmp(ret, "value2", len)); - - ret = hwconfig_arg("key2", &len); - printf("%zd %.*s\n", len, (int)len, ret); - assert(len == 6); - assert(hwconfig_arg_cmp("key2", "value3")); - assert(!strncmp(ret, "value3", len)); - - assert(hwconfig("key3")); - assert(hwconfig_arg("key4", &len) == NULL); - assert(hwconfig_arg("bogus", &len) == NULL); - - unsetenv("hwconfig"); - - assert(hwconfig(NULL) == 0); - assert(hwconfig("") == 0); - assert(hwconfig("key3") == 0); - - return 0; -} -#endif /* HWCONFIG_TEST */ |