2 * National Semiconductor DP83848 PHY Driver for TI DaVinci
3 * (TMS320DM644x) based boards.
5 * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
7 * --------------------------------------------------------
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #include <asm/arch/emac_defs.h>
32 #include "../../../../../drivers/net/davinci_emac.h"
34 #ifdef CONFIG_DRIVER_TI_EMAC
38 int dp83848_is_phy_connected(int phy_addr)
42 if (!davinci_eth_phy_read(phy_addr, DP83848_PHYID1_REG, &id1))
44 if (!davinci_eth_phy_read(phy_addr, DP83848_PHYID2_REG, &id2))
47 if ((id1 == DP83848_PHYID1_OUI) && (id2 == DP83848_PHYID2_OUI))
53 int dp83848_get_link_speed(int phy_addr)
56 volatile emac_regs* emac = (emac_regs *)EMAC_BASE_ADDR;
58 if (!davinci_eth_phy_read(phy_addr, DP83848_STAT_REG, &tmp))
61 if (!(tmp & DP83848_LINK_STATUS)) /* link up? */
64 if (!davinci_eth_phy_read(phy_addr, DP83848_PHY_STAT_REG, &tmp))
67 /* Speed doesn't matter, there is no setting for it in EMAC... */
68 if (tmp & DP83848_DUPLEX) {
69 /* set DM644x EMAC for Full Duplex */
70 emac->MACCONTROL = EMAC_MACCONTROL_MIIEN_ENABLE |
71 EMAC_MACCONTROL_FULLDUPLEX_ENABLE;
73 /*set DM644x EMAC for Half Duplex */
74 emac->MACCONTROL = EMAC_MACCONTROL_MIIEN_ENABLE;
81 int dp83848_init_phy(int phy_addr)
85 if (!dp83848_get_link_speed(phy_addr)) {
86 /* Try another time */
88 ret = dp83848_get_link_speed(phy_addr);
91 /* Disable PHY Interrupts */
92 davinci_eth_phy_write(phy_addr, DP83848_PHY_INTR_CTRL_REG, 0);
98 int dp83848_auto_negotiate(int phy_addr)
103 if (!davinci_eth_phy_read(phy_addr, DP83848_CTL_REG, &tmp))
106 /* Restart Auto_negotiation */
107 tmp &= ~DP83848_AUTONEG; /* remove autonegotiation enable */
108 tmp |= DP83848_ISOLATE; /* Electrically isolate PHY */
109 davinci_eth_phy_write(phy_addr, DP83848_CTL_REG, tmp);
111 /* Set the Auto_negotiation Advertisement Register
112 * MII advertising for Next page, 100BaseTxFD and HD,
113 * 10BaseTFD and HD, IEEE 802.3
115 tmp = DP83848_NP | DP83848_TX_FDX | DP83848_TX_HDX |
116 DP83848_10_FDX | DP83848_10_HDX | DP83848_AN_IEEE_802_3;
117 davinci_eth_phy_write(phy_addr, DP83848_ANA_REG, tmp);
120 /* Read Control Register */
121 if (!davinci_eth_phy_read(phy_addr, DP83848_CTL_REG, &tmp))
124 tmp |= DP83848_SPEED_SELECT | DP83848_AUTONEG | DP83848_DUPLEX_MODE;
125 davinci_eth_phy_write(phy_addr, DP83848_CTL_REG, tmp);
127 /* Restart Auto_negotiation */
128 tmp |= DP83848_RESTART_AUTONEG;
129 davinci_eth_phy_write(phy_addr, DP83848_CTL_REG, tmp);
131 /*check AutoNegotiate complete */
133 if (!davinci_eth_phy_read(phy_addr, DP83848_STAT_REG, &tmp))
136 if (!(tmp & DP83848_AUTONEG_COMP))
139 return (dp83848_get_link_speed(phy_addr));
142 #endif /* CONFIG_CMD_NET */
144 #endif /* CONFIG_DRIVER_ETHER */