source: rtems/c/src/lib/libbsp/sparc/leon2/leon_open_eth/leon_open_eth.c @ c903fc2

/**
 * @file
 * @ingroup sparc_leon2
 * @brief LEON2 Opencores Ethernet MAC Configuration Information
 */

/*
 * Copyright (c) 2004.
 * Aeroflex Gaisler AB.
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rtems.org/license/LICENSE.
 */

#include <bsp.h>
#include <libchip/open_eth.h>
#if (OPEN_ETH_DEBUG & OPEN_ETH_DEBUG_PRINT_REGISTERS)
#include <stdio.h>
#endif

/*
 * Default sizes of transmit and receive descriptor areas
 */
#define RDA_COUNT     16
#define TDA_COUNT     16

/*
 * Default location of device registers
 */
#define OPEN_ETH_BASE_ADDRESS 0xb0000000

/*
 * Default interrupt vector
 */
#define OPEN_ETH_VECTOR 0x1C

open_eth_configuration_t leon_open_eth_configuration = {
  OPEN_ETH_BASE_ADDRESS,        /* base address */
  OPEN_ETH_VECTOR,              /* vector number */
  TDA_COUNT,                 /* number of transmit descriptors */
  RDA_COUNT,                 /* number of receive descriptors */
  0                   /* 100 MHz operation */
};

int rtems_leon_open_eth_driver_attach(struct rtems_bsdnet_ifconfig *config)
{

  /* clear control register and reset NIC */
  *(volatile int *) OPEN_ETH_BASE_ADDRESS = 0;
  *(volatile int *) OPEN_ETH_BASE_ADDRESS = 0x800;
  *(volatile int *) OPEN_ETH_BASE_ADDRESS = 0;

  /* enable 100 MHz operation only if cpu frequency >= 50 MHz */
  if (LEON_REG.Scaler_Reload >= 49) leon_open_eth_configuration.en100MHz = 1;

  if (rtems_open_eth_driver_attach( config, &leon_open_eth_configuration )) {
    LEON_REG.Interrupt_Clear = (1 << (OPEN_ETH_VECTOR - 0x10));
    LEON_REG.Interrupt_Mask  |= (1 << (OPEN_ETH_VECTOR - 0x10));
  }
  return 0;
}