128 lines
2.5 KiB
C
128 lines
2.5 KiB
C
/*
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* parameter.c - device parameters
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*
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* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <common.h>
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#include <param.h>
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#include <errno.h>
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#include <net.h>
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#include <malloc.h>
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#include <driver.h>
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struct param_d *get_param_by_name(struct device_d *dev, const char *name)
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{
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struct param_d *param = dev->param;
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while (param) {
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if (!strcmp(param->name, name))
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return param;
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param = param->next;
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}
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return NULL;
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}
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const char *dev_get_param(struct device_d *dev, const char *name)
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{
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struct param_d *param = get_param_by_name(dev, name);
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if (!param) {
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errno = -EINVAL;
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return NULL;
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}
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if (param->get)
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return param->get(dev, param);
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return param->value;
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}
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#ifdef CONFIG_NET
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IPaddr_t dev_get_param_ip(struct device_d *dev, char *name)
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{
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IPaddr_t ip;
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if (string_to_ip(dev_get_param(dev, name), &ip))
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return 0;
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return ip;
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}
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int dev_set_param_ip(struct device_d *dev, char *name, IPaddr_t ip)
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{
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char ipstr[sizeof("xxx.xxx.xxx.xxx")];
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ip_to_string(ip, ipstr);
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return dev_set_param(dev, name, ipstr);
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}
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#endif
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int dev_set_param(struct device_d *dev, const char *name, const char *val)
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{
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struct param_d *param;
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if (!dev) {
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errno = -ENODEV;
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return -ENODEV;
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}
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param = get_param_by_name(dev, name);
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if (!param) {
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errno = -EINVAL;
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return -EINVAL;
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}
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if (param->flags & PARAM_FLAG_RO) {
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errno = -EACCES;
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return -EACCES;
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}
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if (param->set) {
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errno = param->set(dev, param, val);
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return errno;
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}
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if (param->value)
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free(param->value);
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param->value = strdup(val);
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return 0;
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}
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int dev_add_param(struct device_d *dev, struct param_d *newparam)
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{
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struct param_d *param = dev->param;
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newparam->next = NULL;
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if (param) {
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while (param->next)
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param = param->next;
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param->next = newparam;
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} else {
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dev->param = newparam;
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}
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return 0;
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}
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