diff options
Diffstat (limited to 'arch/arm/mach-davinci/dp83848.c')
-rw-r--r-- | arch/arm/mach-davinci/dp83848.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/dp83848.c b/arch/arm/mach-davinci/dp83848.c new file mode 100644 index 0000000..6387e95 --- /dev/null +++ b/arch/arm/mach-davinci/dp83848.c @@ -0,0 +1,128 @@ +/* + * National Semiconductor DP83848 PHY Driver for TI DaVinci + * (TMS320DM644x) based boards. + * + * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net> + * + * -------------------------------------------------------- + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <net.h> +#include <dp83848.h> +#include <asm/arch/emac_defs.h> +#include "../../../drivers/net/davinci_emac.h" + +#ifdef CONFIG_DRIVER_TI_EMAC + +#ifdef CONFIG_CMD_NET + +int dp83848_is_phy_connected(int phy_addr) +{ + u_int16_t id1, id2; + + if (!davinci_eth_phy_read(phy_addr, DP83848_PHYID1_REG, &id1)) + return(0); + if (!davinci_eth_phy_read(phy_addr, DP83848_PHYID2_REG, &id2)) + return(0); + + if ((id1 == DP83848_PHYID1_OUI) && (id2 == DP83848_PHYID2_OUI)) + return(1); + + return(0); +} + +int dp83848_get_link_speed(int phy_addr) +{ + u_int16_t tmp; + volatile emac_regs* emac = (emac_regs *)EMAC_BASE_ADDR; + + if (!davinci_eth_phy_read(phy_addr, DP83848_STAT_REG, &tmp)) + return(0); + + if (!(tmp & DP83848_LINK_STATUS)) /* link up? */ + return(0); + + if (!davinci_eth_phy_read(phy_addr, DP83848_PHY_STAT_REG, &tmp)) + return(0); + + /* Speed doesn't matter, there is no setting for it in EMAC... */ + if (tmp & DP83848_DUPLEX) { + /* 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 dp83848_init_phy(int phy_addr) +{ + int ret = 1; + + if (!dp83848_get_link_speed(phy_addr)) { + /* Try another time */ + udelay(100000); + ret = dp83848_get_link_speed(phy_addr); + } + + /* Disable PHY Interrupts */ + davinci_eth_phy_write(phy_addr, DP83848_PHY_INTR_CTRL_REG, 0); + + return(ret); +} + + +int dp83848_auto_negotiate(int phy_addr) +{ + u_int16_t tmp; + + + if (!davinci_eth_phy_read(phy_addr, DP83848_CTL_REG, &tmp)) + return(0); + + /* Restart Auto_negotiation */ + tmp &= ~DP83848_AUTONEG; /* remove autonegotiation enable */ + tmp |= DP83848_ISOLATE; /* Electrically isolate PHY */ + davinci_eth_phy_write(phy_addr, DP83848_CTL_REG, tmp); + + /* Set the Auto_negotiation Advertisement Register + * MII advertising for Next page, 100BaseTxFD and HD, + * 10BaseTFD and HD, IEEE 802.3 + */ + tmp = DP83848_NP | DP83848_TX_FDX | DP83848_TX_HDX | + DP83848_10_FDX | DP83848_10_HDX | DP83848_AN_IEEE_802_3; + davinci_eth_phy_write(phy_addr, DP83848_ANA_REG, tmp); + + + /* Read Control Register */ + if (!davinci_eth_phy_read(phy_addr, DP83848_CTL_REG, &tmp)) + return(0); + + tmp |= DP83848_SPEED_SELECT | DP83848_AUTONEG | DP83848_DUPLEX_MODE; + davinci_eth_phy_write(phy_addr, DP83848_CTL_REG, tmp); + + /* Restart Auto_negotiation */ + tmp |= DP83848_RESTART_AUTONEG; + davinci_eth_phy_write(phy_addr, DP83848_CTL_REG, tmp); + + /*check AutoNegotiate complete */ + udelay(10000); + if (!davinci_eth_phy_read(phy_addr, DP83848_STAT_REG, &tmp)) + return(0); + + if (!(tmp & DP83848_AUTONEG_COMP)) + return(0); + + return (dp83848_get_link_speed(phy_addr)); +} + +#endif /* CONFIG_CMD_NET */ + +#endif /* CONFIG_DRIVER_ETHER */ |