1 // SPDX-License-Identifier: GPL-2.0+
3 * Intel LXT971/LXT972 PHY Driver for TI DaVinci
4 * (TMS320DM644x) based boards.
6 * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
8 * --------------------------------------------------------
15 #include <asm/arch/emac_defs.h>
16 #include "../../../drivers/net/davinci_emac.h"
18 #ifdef CONFIG_DRIVER_TI_EMAC
22 int lxt972_is_phy_connected(int phy_addr)
26 if (!davinci_eth_phy_read(phy_addr, MII_PHYSID1, &id1))
28 if (!davinci_eth_phy_read(phy_addr, MII_PHYSID2, &id2))
31 if ((id1 == (0x0013)) && ((id2 & 0xfff0) == 0x78e0))
37 int lxt972_get_link_speed(int phy_addr)
40 volatile emac_regs *emac = (emac_regs *)EMAC_BASE_ADDR;
42 if (!davinci_eth_phy_read(phy_addr, PHY_LXT971_STAT2, &stat1))
45 if (!(stat1 & PHY_LXT971_STAT2_LINK)) /* link up? */
48 if (!davinci_eth_phy_read(phy_addr, PHY_LXT971_DIG_CFG, &tmp))
51 tmp |= PHY_LXT971_DIG_CFG_MII_DRIVE;
53 davinci_eth_phy_write(phy_addr, PHY_LXT971_DIG_CFG, tmp);
55 if (!davinci_eth_phy_read(phy_addr, PHY_LXT971_DIG_CFG, &tmp))
58 /* Speed doesn't matter, there is no setting for it in EMAC... */
59 if (stat1 & PHY_LXT971_STAT2_DUPLEX_MODE) {
60 /* set DM644x EMAC for Full Duplex */
61 emac->MACCONTROL = EMAC_MACCONTROL_MIIEN_ENABLE |
62 EMAC_MACCONTROL_FULLDUPLEX_ENABLE;
64 /*set DM644x EMAC for Half Duplex */
65 emac->MACCONTROL = EMAC_MACCONTROL_MIIEN_ENABLE;
72 int lxt972_init_phy(int phy_addr)
76 if (!lxt972_get_link_speed(phy_addr)) {
77 /* Try another time */
78 ret = lxt972_get_link_speed(phy_addr);
81 /* Disable PHY Interrupts */
82 davinci_eth_phy_write(phy_addr, PHY_LXT971_INT_ENABLE, 0);
88 int lxt972_auto_negotiate(int phy_addr)
92 if (!davinci_eth_phy_read(phy_addr, MII_BMCR, &tmp))
95 /* Restart Auto_negotiation */
96 tmp |= BMCR_ANRESTART;
97 davinci_eth_phy_write(phy_addr, MII_BMCR, tmp);
99 /*check AutoNegotiate complete */
101 if (!davinci_eth_phy_read(phy_addr, MII_BMSR, &tmp))
104 if (!(tmp & BMSR_ANEGCOMPLETE))
107 return (lxt972_get_link_speed(phy_addr));
110 #endif /* CONFIG_CMD_NET */
112 #endif /* CONFIG_DRIVER_ETHER */