net/eth.c

   1 /*
   2  * (C) Copyright 2001-2004
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <driver.h>
  27 #include <init.h>
  28 #include <net.h>
  29 #include <miidev.h>
  30 #include <errno.h>
  31 #include <malloc.h>
  32
  33 static struct eth_device *eth_current;
  34
  35 static LIST_HEAD(netdev_list);
  36
  37 void eth_set_current(struct eth_device *eth)
  38 {
  39         if (eth_current && eth_current->active) {
  40                 eth_current->halt(eth_current);
  41                 eth_current->active = 0;
  42         }
  43
  44         eth_current = eth;
  45         net_update_env();
  46 }
  47
  48 struct eth_device * eth_get_current(void)
  49 {
  50         return eth_current;
  51 }
  52
  53 struct eth_device *eth_get_byname(char *ethname)
  54 {
  55         struct eth_device *edev;
  56         char name[MAX_DRIVER_NAME];
  57
  58         list_for_each_entry(edev, &netdev_list, list) {
  59                 sprintf(name, "%s%d", edev->dev.name, edev->dev.id);
  60                 if (!strcmp(ethname, name))
  61                         return edev;
  62         }
  63         return NULL;
  64 }
  65
  66 int eth_send(void *packet, int length)
  67 {
  68         int ret;
  69
  70         if (!eth_current)
  71                 return -ENODEV;
  72
  73         if (!eth_current->active) {
  74                 ret = eth_current->open(eth_current);
  75                 if (ret)
  76                         return ret;
  77                 eth_current->active = 1;
  78         }
  79
  80         return eth_current->send(eth_current, packet, length);
  81 }
  82
  83 int eth_rx(void)
  84 {
  85         int ret;
  86
  87         if (!eth_current)
  88                 return -ENODEV;
  89
  90         if (!eth_current->active) {
  91                 ret = eth_current->open(eth_current);
  92                 if (ret)
  93                         return ret;
  94                 eth_current->active = 1;
  95         }
  96
  97         return eth_current->recv(eth_current);
  98 }
  99
 100 static int eth_set_ethaddr(struct device_d *dev, struct param_d *param, const char *val)
 101 {
 102         struct eth_device *edev = dev->type_data;
 103         char ethaddr[sizeof("xx:xx:xx:xx:xx:xx")];
 104
 105         if (!val)
 106                 return dev_param_set_generic(dev, param, NULL);
 107
 108         if (string_to_ethaddr(val, ethaddr) < 0)
 109                 return -EINVAL;
 110
 111         dev_param_set_generic(dev, param, val);
 112
 113         edev->set_ethaddr(edev, ethaddr);
 114
 115         if (edev == eth_current)
 116                 net_update_env();
 117
 118         return 0;
 119 }
 120
 121 static int eth_set_ipaddr(struct device_d *dev, struct param_d *param, const char *val)
 122 {
 123         struct eth_device *edev = dev->type_data;
 124         IPaddr_t ip;
 125
 126         if (!val)
 127                 return dev_param_set_generic(dev, param, NULL);
 128
 129         if (string_to_ip(val, &ip))
 130                 return -EINVAL;
 131
 132         dev_param_set_generic(dev, param, val);
 133
 134         if (edev == eth_current)
 135                 net_update_env();
 136
 137         return 0;
 138 }
 139
 140 int eth_register(struct eth_device *edev)
 141 {
 142         struct device_d *dev = &edev->dev;
 143         unsigned char ethaddr_str[20];
 144         unsigned char ethaddr[6];
 145
 146         if (!edev->get_ethaddr) {
 147                 printf("no get_mac_address found for current eth device\n");
 148                 return -1;
 149         }
 150
 151         strcpy(edev->dev.name, "eth");
 152         register_device(&edev->dev);
 153
 154         dev->type_data = edev;
 155         dev_add_param(dev, "ipaddr", eth_set_ipaddr, NULL, 0);
 156         dev_add_param(dev, "ethaddr", eth_set_ethaddr, NULL, 0);
 157         dev_add_param(dev, "gateway", eth_set_ipaddr, NULL, 0);
 158         dev_add_param(dev, "netmask", eth_set_ipaddr, NULL, 0);
 159         dev_add_param(dev, "serverip", eth_set_ipaddr, NULL, 0);
 160
 161         edev->init(edev);
 162
 163         list_add_tail(&edev->list, &netdev_list);
 164
 165         if (edev->get_ethaddr(edev, ethaddr) == 0) {
 166                 ethaddr_to_string(ethaddr, ethaddr_str);
 167                 printf("got MAC address from EEPROM: %s\n",&ethaddr_str);
 168                 dev_set_param(dev, "ethaddr", ethaddr_str);
 169         }
 170
 171         if (!eth_current)
 172                 eth_current = edev;
 173
 174         return 0;
 175 }
 176
 177 void eth_unregister(struct eth_device *edev)
 178 {
 179         dev_remove_parameters(&edev->dev);
 180
 181         list_del(&edev->list);
 182 }
 183
 184