//==========================================================================
//
//      DM9161.c
//
//      Ethernet transciever (PHY) support 
//
//==========================================================================
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//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    jlarmour
// Contributors: 
// Date:         2005-08-07
// Purpose:      Derived from similar PHY support by gthomas,nickg
// Description:  Support for ethernet Davicom DM9161 PHY
//              
//
//####DESCRIPTIONEND####
//
//==========================================================================

#include <pkgconf/devs_eth_phy.h>

#include <cyg/infra/cyg_type.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 dm9161_stat(eth_phy_access_t *f, int *state)
{
    unsigned short phy_state;
    int tries;

    // Read negotiated state
    if (_eth_phy_read(f, 0x1, f->phy_addr, &phy_state)) {
        if ((phy_state & 0x20) == 0) {
            eth_phy_printf("... waiting for auto-negotiation");
            for (tries = 0;  tries < 2*CYGNUM_DEVS_ETH_PHY_AUTO_NEGOTIATION_TIME;  tries++) {
                if (_eth_phy_read(f, 0x1, f->phy_addr, &phy_state)) {
                    if ((phy_state & 0x20) != 0) {
                        break;
                    }
                }
                eth_phy_delay_us(500000);   // 1/2 second
                eth_phy_printf(".");
            }
            eth_phy_printf("\n");
        }
        if ((phy_state & 0x20) != 0) {
            *state = 0;
            if ((phy_state & 0x0004) != 0) *state |= ETH_PHY_STAT_LINK;
            if (_eth_phy_read(f, 0x5, f->phy_addr, &phy_state)) {
                // Partner negotiated parameters
                if ((phy_state & 0x0100) != 0) *state |= ETH_PHY_STAT_100MB | ETH_PHY_STAT_FDX;
                if ((phy_state & 0x0080) != 0) *state |= ETH_PHY_STAT_100MB;
                if ((phy_state & 0x0040) != 0) *state |= ETH_PHY_STAT_FDX;
                return true;
            }
        }
    }
    return false;
}

_eth_phy_dev("Davicom DM9161", 0x0181b880, dm9161_stat)
// No, I don't know the difference between the next two.
// It seems just both are DM9161A's but made at a different time. Shrug.
_eth_phy_dev("Davicom DM9161A", 0x0181b881, dm9161_stat)
_eth_phy_dev("Davicom DM9161A", 0x0181b8a0, dm9161_stat)

// EOF DM9161.c
