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/*
* LEON3 Opencores Ethernet MAC Configuration Information
*
* COPYRIGHT (c) 2004.
* Gaisler Research
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* leon_open_eth.c,v 1.1.2.1 2005/10/05 19:26:00 joel Exp
*/
#include <bsp.h>
#include <libchip/greth.h>
/*#if (GRETH_DEBUG & GRETH_DEBUG_PRINT_REGISTERS)*/
#include <stdio.h>
/*#endif*/
/*
* Default sizes of transmit and receive descriptor areas
*/
#define RDA_COUNT 32
#define TDA_COUNT 32
greth_configuration_t leon_greth_configuration;
int rtems_leon_greth_driver_attach(
struct rtems_bsdnet_ifconfig *config,
int attach
)
{
int device_found = 0;
int i;
unsigned int conf, iobar;
unsigned int base_addr = 0; /* avoid warnings */
unsigned int eth_irq = 0; /* avoid warnings */
/* Scan for MAC AHB slave interface */
for (i = 0; i < amba_conf.apbslv.devnr; i++)
{
conf = amba_get_confword(amba_conf.apbslv, i, 0);
if ((amba_vendor(conf) == VENDOR_GAISLER) &&
(amba_device(conf) == GAISLER_ETHMAC))
{
iobar = amba_apb_get_membar(amba_conf.apbslv, i);
base_addr = amba_iobar_start(amba_conf.apbmst, iobar);
eth_irq = amba_irq(conf) + 0x10;
device_found = 1;
break;
}
}
if (device_found)
{
/* clear control register and reset NIC */
*(volatile int *) base_addr = 0;
*(volatile int *) base_addr = GRETH_CTRL_RST;
*(volatile int *) base_addr = 0;
leon_greth_configuration.base_address = base_addr;
leon_greth_configuration.vector = eth_irq;
leon_greth_configuration.txd_count = TDA_COUNT;
leon_greth_configuration.rxd_count = RDA_COUNT;
if (rtems_greth_driver_attach( config, &leon_greth_configuration )) {
LEON_Clear_interrupt(leon_greth_configuration.vector);
LEON_Unmask_interrupt(leon_greth_configuration.vector);
}
}
return 0;
}
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