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// SPDX-License-Identifier: GPL-2.0+
/*
* Intel LXT971/LXT972 PHY Driver for TI DaVinci
* (TMS320DM644x) based boards.
*
* Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
*
* --------------------------------------------------------
*/
#include <common.h>
#include <net.h>
#include <miiphy.h>
#include <lxt971a.h>
#include <asm/arch/emac_defs.h>
#include "../../../drivers/net/ti/davinci_emac.h"
#ifdef CONFIG_DRIVER_TI_EMAC
#ifdef CONFIG_CMD_NET
int lxt972_is_phy_connected(int phy_addr)
{
u_int16_t id1, id2;
if (!davinci_eth_phy_read(phy_addr, MII_PHYSID1, &id1))
return(0);
if (!davinci_eth_phy_read(phy_addr, MII_PHYSID2, &id2))
return(0);
if ((id1 == (0x0013)) && ((id2 & 0xfff0) == 0x78e0))
return(1);
return(0);
}
int lxt972_get_link_speed(int phy_addr)
{
u_int16_t stat1, tmp;
volatile emac_regs *emac = (emac_regs *)EMAC_BASE_ADDR;
if (!davinci_eth_phy_read(phy_addr, PHY_LXT971_STAT2, &stat1))
return(0);
if (!(stat1 & PHY_LXT971_STAT2_LINK)) /* link up? */
return(0);
if (!davinci_eth_phy_read(phy_addr, PHY_LXT971_DIG_CFG, &tmp))
return(0);
tmp |= PHY_LXT971_DIG_CFG_MII_DRIVE;
davinci_eth_phy_write(phy_addr, PHY_LXT971_DIG_CFG, tmp);
/* Read back */
if (!davinci_eth_phy_read(phy_addr, PHY_LXT971_DIG_CFG, &tmp))
return(0);
/* Speed doesn't matter, there is no setting for it in EMAC... */
if (stat1 & PHY_LXT971_STAT2_DUPLEX_MODE) {
/* set DM644x EMAC for Full Duplex */
emac->MACCONTROL = EMAC_MACCONTROL_MIIEN_ENABLE |
EMAC_MACCONTROL_FULLDUPLEX_ENABLE;
} else {
/*set DM644x EMAC for Half Duplex */
emac->MACCONTROL = EMAC_MACCONTROL_MIIEN_ENABLE;
}
return(1);
}
int lxt972_init_phy(int phy_addr)
{
int ret = 1;
if (!lxt972_get_link_speed(phy_addr)) {
/* Try another time */
ret = lxt972_get_link_speed(phy_addr);
}
/* Disable PHY Interrupts */
davinci_eth_phy_write(phy_addr, PHY_LXT971_INT_ENABLE, 0);
return(ret);
}
int lxt972_auto_negotiate(int phy_addr)
{
u_int16_t tmp;
if (!davinci_eth_phy_read(phy_addr, MII_BMCR, &tmp))
return(0);
/* Restart Auto_negotiation */
tmp |= BMCR_ANRESTART;
davinci_eth_phy_write(phy_addr, MII_BMCR, tmp);
/*check AutoNegotiate complete */
udelay (10000);
if (!davinci_eth_phy_read(phy_addr, MII_BMSR, &tmp))
return(0);
if (!(tmp & BMSR_ANEGCOMPLETE))
return(0);
return (lxt972_get_link_speed(phy_addr));
}
#endif /* CONFIG_CMD_NET */
#endif /* CONFIG_DRIVER_ETHER */
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