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 <miiphy.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         eth_current = eth;
  40 }
  41
  42 struct eth_device * eth_get_current(void)
  43 {
  44         return eth_current;
  45 }
  46
  47 struct eth_device *eth_get_byname(char *ethname)
  48 {
  49         struct eth_device *edev;
  50         char name[MAX_DRIVER_NAME];
  51
  52         list_for_each_entry(edev, &netdev_list, list) {
  53                 sprintf(name, "%s%d", edev->dev.name, edev->dev.id);
  54                 if (!strcmp(ethname, name))
  55                         return edev;
  56         }
  57         return NULL;
  58 }
  59
  60 int eth_open(void)
  61 {
  62         if (!eth_current)
  63                 return -ENODEV;
  64
  65         return eth_current->open(eth_current);
  66 }
  67
  68 void eth_halt(void)
  69 {
  70         if (!eth_current)
  71                 return;
  72
  73         eth_current->halt(eth_current);
  74
  75         eth_current->state = ETH_STATE_PASSIVE;
  76 }
  77
  78 int eth_send(void *packet, int length)
  79 {
  80         if (!eth_current)
  81                 return -ENODEV;
  82
  83         return eth_current->send(eth_current, packet, length);
  84 }
  85
  86 int eth_rx(void)
  87 {
  88         if (!eth_current)
  89                 return -ENODEV;
  90
  91         return eth_current->recv(eth_current);
  92 }
  93
  94 static int eth_set_ethaddr(struct device_d *dev, struct param_d *param, const char *val)
  95 {
  96         struct eth_device *edev = dev->type_data;
  97         char ethaddr[sizeof("xx:xx:xx:xx:xx:xx")];
  98
  99         if (string_to_ethaddr(val, ethaddr) < 0)
 100                 return -EINVAL;
 101
 102         free(param->value);
 103         param->value = strdup(val);
 104
 105         edev->set_ethaddr(edev, ethaddr);
 106
 107         return 0;
 108 }
 109
 110 static int eth_set_ipaddr(struct device_d *dev, struct param_d *param, const char *val)
 111 {
 112         IPaddr_t ip;
 113
 114         if (string_to_ip(val, &ip))
 115                 return -EINVAL;
 116
 117         free(param->value);
 118         param->value = strdup(val);
 119
 120         return 0;
 121 }
 122
 123 int eth_register(struct eth_device *edev)
 124 {
 125         struct device_d *dev = &edev->dev;
 126         unsigned char ethaddr_str[20];
 127         unsigned char ethaddr[6];
 128
 129         if (!edev->get_ethaddr) {
 130                 printf("no get_mac_address found for current eth device\n");
 131                 return -1;
 132         }
 133
 134         strcpy(edev->dev.name, "eth");
 135         register_device(&edev->dev);
 136
 137         dev->type_data = edev;
 138         edev->param_ip.name = "ipaddr";
 139         edev->param_ip.set = &eth_set_ipaddr;
 140         edev->param_ethaddr.name = "ethaddr";
 141         edev->param_ethaddr.set = &eth_set_ethaddr;
 142         edev->param_gateway.name = "gateway";
 143         edev->param_gateway.set = &eth_set_ipaddr;
 144         edev->param_netmask.name = "netmask";
 145         edev->param_netmask.set = &eth_set_ipaddr;
 146         edev->param_serverip.name = "serverip";
 147         edev->param_serverip.set = &eth_set_ipaddr;
 148         dev_add_param(dev, &edev->param_ip);
 149         dev_add_param(dev, &edev->param_ethaddr);
 150         dev_add_param(dev, &edev->param_gateway);
 151         dev_add_param(dev, &edev->param_netmask);
 152         dev_add_param(dev, &edev->param_serverip);
 153
 154         edev->init(edev);
 155
 156         list_add_tail(&edev->list, &netdev_list);
 157
 158         if (edev->get_ethaddr(edev, ethaddr) == 0) {
 159                 ethaddr_to_string(ethaddr, ethaddr_str);
 160                 printf("got MAC address from EEPROM: %s\n",ethaddr_str);
 161                 dev_set_param(dev, "ethaddr", ethaddr_str);
 162         }
 163
 164         if (!eth_current)
 165                 eth_current = edev;
 166
 167         return 0;
 168 }
 169
 170 void eth_unregister(struct eth_device *edev)
 171 {
 172         if (edev->param_ip.value)
 173                 free(edev->param_ip.value);
 174         if (edev->param_ethaddr.value)
 175                 free(edev->param_ethaddr.value);
 176         if (edev->param_gateway.value)
 177                 free(edev->param_gateway.value);
 178         if (edev->param_netmask.value)
 179                 free(edev->param_netmask.value);
 180         if (edev->param_serverip.value)
 181                 free(edev->param_serverip.value);
 182
 183         if (eth_current == edev)
 184                 eth_current = NULL;
 185
 186         list_del(&edev->list);
 187 }
 188