uhd

/*

 * Copyright 2010-2012 Ettus Research LLC

 * Copyright 2007 Free Software Foundation, Inc.

 *

 * 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 3 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

#include "ethernet.h"

#include "memory_map.h"

#include "nonstdio.h"

#include <stdbool.h>

#include <string.h>

#include "i2c.h"

#include "usrp2/fw_common.h"

static bool

unprogrammed(const void *t, size_t len)

{

  int i;

  uint8_t *p = (uint8_t *)t;

  bool all_zeros = true;

  bool all_ones =  true;

  for (i = 0; i < len; i++){

    all_zeros &= p[i] == 0x00;

    all_ones  &= p[i] == 0xff;

  }

  return all_ones | all_zeros;

}

typedef struct{

    eth_mac_addr_t mac_addr;

    struct ip_addr ip_addr;

    struct ip_addr gateway;

    struct ip_addr subnet;

} eth_addrs_t;

static bool eth_addrs_initialized = false;

static const eth_addrs_t default_eth_addrs = {

    .mac_addr = {{0x00, 0x50, 0xC2, 0x85, 0x3f, 0xff}},

    .ip_addr = {(192 << 24 | 168 << 16 | 10  << 8  | 2 << 0)},

    .gateway = {(192 << 24 | 168 << 16 | 10  << 8  | 1 << 0)},

    .subnet  = {(255 << 24 | 255 << 16 | 255 << 8  | 0 << 0)},

};

static eth_addrs_t current_eth_addrs;

static void eth_addrs_init(void){

    if (eth_addrs_initialized) return;

    eth_addrs_initialized = true;

    #define eth_addrs_init_x(addr, x){ \

        const bool ok = eeprom_read(USRP2_I2C_ADDR_MBOARD, addr, &current_eth_addrs.x, sizeof(current_eth_addrs.x)); \

        if (!ok || unprogrammed(&current_eth_addrs.x, sizeof(current_eth_addrs.x))){ \

            memcpy(&current_eth_addrs.x, &default_eth_addrs.x, sizeof(current_eth_addrs.x)); \

        } \

    }

    eth_addrs_init_x(USRP2_EE_MBOARD_MAC_ADDR, mac_addr);

    eth_addrs_init_x(USRP2_EE_MBOARD_IP_ADDR,  ip_addr);

    eth_addrs_init_x(USRP2_EE_MBOARD_GATEWAY,  gateway);

    eth_addrs_init_x(USRP2_EE_MBOARD_SUBNET,   subnet);

}

const eth_mac_addr_t *ethernet_mac_addr(void){

    eth_addrs_init();

    return &current_eth_addrs.mac_addr;

}

const struct ip_addr *get_ip_addr(void){

    eth_addrs_init();

    return &current_eth_addrs.ip_addr;

}

const struct ip_addr *get_subnet(void){

    eth_addrs_init();

    return &current_eth_addrs.subnet;

}

const struct ip_addr *get_gateway(void){

    eth_addrs_init();

    return &current_eth_addrs.gateway;

}

bool set_ip_addr(const struct ip_addr *t){

    const bool ok = eeprom_write(USRP2_I2C_ADDR_MBOARD, USRP2_EE_MBOARD_IP_ADDR, t, sizeof(struct ip_addr));

    if (ok) current_eth_addrs.ip_addr = *t;

    return ok;

}

void eth_addrs_set_default(void){

    eth_addrs_initialized = true;

    memcpy(&current_eth_addrs, &default_eth_addrs, sizeof(default_eth_addrs));

}