96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/*
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* drivers/net/phy/national.c
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*
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* Driver for National Semiconductor PHYs
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*
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* based on Stuart Menefy's linux national.c driver
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <common.h>
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#include <init.h>
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#include <linux/phy.h>
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/* Advanced proprietary configuration */
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#define NS_EXP_MEM_CTL 0x16
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#define NS_EXP_MEM_DATA 0x1d
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#define NS_EXP_MEM_ADD 0x1e
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#define LED_CTRL_REG 0x13
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#define AN_FALLBACK_AN 0x0001
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#define AN_FALLBACK_CRC 0x0002
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#define AN_FALLBACK_IE 0x0004
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#define ALL_FALLBACK_ON (AN_FALLBACK_AN | AN_FALLBACK_CRC | AN_FALLBACK_IE)
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enum hdx_loopback {
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hdx_loopback_on = 0,
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hdx_loopback_off = 1,
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};
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static u8 ns_exp_read(struct phy_device *phydev, u16 reg)
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{
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phy_write(phydev, NS_EXP_MEM_ADD, reg);
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return phy_read(phydev, NS_EXP_MEM_DATA);
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}
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static void ns_exp_write(struct phy_device *phydev, u16 reg, u8 data)
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{
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phy_write(phydev, NS_EXP_MEM_ADD, reg);
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phy_write(phydev, NS_EXP_MEM_DATA, data);
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}
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static void ns_giga_speed_fallback(struct phy_device *phydev, int mode)
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{
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int bmcr = phy_read(phydev, MII_BMCR);
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phy_write(phydev, MII_BMCR, (bmcr | BMCR_PDOWN));
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/* Enable 8 bit expended memory read/write (no auto increment) */
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phy_write(phydev, NS_EXP_MEM_CTL, 0);
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phy_write(phydev, NS_EXP_MEM_ADD, 0x1C0);
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phy_write(phydev, NS_EXP_MEM_DATA, 0x0008);
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phy_write(phydev, MII_BMCR, (bmcr & ~BMCR_PDOWN));
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phy_write(phydev, LED_CTRL_REG, mode);
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}
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static void ns_10_base_t_hdx_loopack(struct phy_device *phydev, int disable)
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{
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if (disable)
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ns_exp_write(phydev, 0x1c0, ns_exp_read(phydev, 0x1c0) | 1);
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else
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ns_exp_write(phydev, 0x1c0,
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ns_exp_read(phydev, 0x1c0) & 0xfffe);
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pr_debug("10BASE-T HDX loopback %s\n",
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(ns_exp_read(phydev, 0x1c0) & 0x0001) ? "off" : "on");
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}
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static int ns_config_init(struct phy_device *phydev)
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{
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ns_giga_speed_fallback(phydev, ALL_FALLBACK_ON);
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/* In the latest MAC or switches design, the 10 Mbps loopback
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is desired to be turned off. */
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ns_10_base_t_hdx_loopack(phydev, hdx_loopback_off);
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return 0;
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}
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static struct phy_driver dp83865_driver = {
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.phy_id = 0x20005c70,
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.phy_id_mask = 0xfffffff0,
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.drv.name = "NatSemi DP83865",
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.features = PHY_GBIT_FEATURES |
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SUPPORTED_Pause | SUPPORTED_Asym_Pause,
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.config_init = ns_config_init,
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};
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static int ns_phy_init(void)
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{
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return phy_driver_register(&dp83865_driver);
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}
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fs_initcall(ns_phy_init);
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