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-rw-r--r--arch/arm/mach-davinci/dp83848.c128
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 */