//==========================================================================
//
//      dev/DP83847.c
//
//      Ethernet transceiver (PHY) support 
//
//==========================================================================
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// -------------------------------------------                              
// This file is part of eCos, the Embedded Configurable Operating System.   
// Copyright (C) 2003 Free Software Foundation, Inc.                        
//
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// for more details.                                                        
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//
// As a special exception, if other files instantiate templates or use      
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//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    gthomas
// Contributors: 
// Date:         2003-08-01
// Purpose:      
// Description:  Support for ethernet NS DP83847 PHY
//              
//
//####DESCRIPTIONEND####
//
//==========================================================================

#include <pkgconf/system.h>
#include <pkgconf/devs_eth_phy.h>

#include <cyg/infra/cyg_type.h>

#include <cyg/hal/hal_arch.h>
#include <cyg/hal/drv_api.h>
#include <cyg/hal/hal_if.h>
#include <cyg/hal/hal_tables.h>

#include <cyg/io/eth_phy.h>
#include <cyg/io/eth_phy_dev.h>

static bool dp83847_stat(eth_phy_access_t *f, int *state)
{
    unsigned short phy_state;
    int tries;

    // Read negotiated state
    if (_eth_phy_read(f, 0x10, f->phy_addr, &phy_state)) {
        if ((phy_state & 0x10) == 0) {
            eth_phy_printf("... waiting for auto-negotiation");
            for (tries = 0;  tries < CYGINT_DEVS_ETH_PHY_AUTO_NEGOTIATION_TIME;  tries++) {
                if (_eth_phy_read(f, 0x10, f->phy_addr, &phy_state)) {
                    if ((phy_state & 0x10) != 0) {
                        break;
                    }
                }
                CYGACC_CALL_IF_DELAY_US(1000000);   // 1 second
                eth_phy_printf(".");
            }
            eth_phy_printf("\n");
        }
        if ((phy_state & 0x10) != 0) {
            *state = 0;
            if ((phy_state & 0x0001) != 0) *state |= ETH_PHY_STAT_LINK;
            if ((phy_state & 0x0002) == 0) *state |= ETH_PHY_STAT_100MB;
            if ((phy_state & 0x0004) != 0) *state |= ETH_PHY_STAT_FDX;
            return true;
        }
    }
    return false;
}

_eth_phy_dev("National Semiconductor DP83847", 0x20005c30, dp83847_stat)
