api/api_net.c

   1 /*
   2  * (C) Copyright 2007 Semihalf
   3  *
   4  * Written by: Rafal Jaworowski <raj@semihalf.com>
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  *
  24  */
  25
  26 #include <config.h>
  27 #include <common.h>
  28 #include <net.h>
  29 #include <linux/types.h>
  30 #include <api_public.h>
  31
  32 DECLARE_GLOBAL_DATA_PTR;
  33
  34 #define DEBUG
  35 #undef DEBUG
  36
  37 #if !defined(CONFIG_NET_MULTI)
  38 #error "API/net is currently only available for platforms with CONFIG_NET_MULTI"
  39 #endif
  40
  41 #ifdef DEBUG
  42 #define debugf(fmt, args...) do { printf("%s(): ", __func__); printf(fmt, ##args); } while (0)
  43 #else
  44 #define debugf(fmt, args...)
  45 #endif
  46
  47 #define errf(fmt, args...) do { printf("ERROR @ %s(): ", __func__); printf(fmt, ##args); } while (0)
  48
  49
  50 static int dev_valid_net(void *cookie)
  51 {
  52         return ((void *)eth_get_dev() == cookie) ? 1 : 0;
  53 }
  54
  55 int dev_open_net(void *cookie)
  56 {
  57         if (!dev_valid_net(cookie))
  58                 return API_ENODEV;
  59
  60         if (eth_init(gd->bd) < 0)
  61                 return API_EIO;
  62
  63         return 0;
  64 }
  65
  66 int dev_close_net(void *cookie)
  67 {
  68         if (!dev_valid_net(cookie))
  69                 return API_ENODEV;
  70
  71         eth_halt();
  72         return 0;
  73 }
  74
  75 /*
  76  * There can only be one active eth interface at a time - use what is
  77  * currently set to eth_current
  78  */
  79 int dev_enum_net(struct device_info *di)
  80 {
  81         struct eth_device *eth_current = eth_get_dev();
  82
  83         di->type = DEV_TYP_NET;
  84         di->cookie = (void *)eth_current;
  85         if (di->cookie == NULL)
  86                 return 0;
  87
  88         memcpy(di->di_net.hwaddr, eth_current->enetaddr, 6);
  89
  90         debugf("device found, returning cookie 0x%08x\n",
  91                 (u_int32_t)di->cookie);
  92
  93         return 1;
  94 }
  95
  96 int dev_write_net(void *cookie, void *buf, int len)
  97 {
  98         /* XXX verify that cookie points to a valid net device??? */
  99
 100         return eth_send(buf, len);
 101 }
 102
 103 int dev_read_net(void *cookie, void *buf, int len)
 104 {
 105         /* XXX verify that cookie points to a valid net device??? */
 106
 107         return eth_receive(buf, len);
 108 }