975ae7c69d
The VSC7385, VSC7388, VSC7395 and VSC7398 are integrated switch/router chips for 5+1 or 8-port switches/routers. When managed directly by Linux using DSA we need to do a special set-up "dance" on the PHY. Unfortunately these sequences switches the PHY to undocumented pages named 2a30 and 52b6 and does undocumented things. It is described by these opaque sequences also in the reference manual. This is a best effort to integrate it anyways. Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
543 lines
15 KiB
C
543 lines
15 KiB
C
/*
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* Driver for Vitesse PHYs
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*
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* Author: Kriston Carson
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*
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* Copyright (c) 2005, 2009, 2011 Freescale Semiconductor, Inc.
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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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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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/* Vitesse Extended Page Magic Register(s) */
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#define MII_VSC82X4_EXT_PAGE_16E 0x10
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#define MII_VSC82X4_EXT_PAGE_17E 0x11
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#define MII_VSC82X4_EXT_PAGE_18E 0x12
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/* Vitesse Extended Control Register 1 */
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#define MII_VSC8244_EXT_CON1 0x17
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#define MII_VSC8244_EXTCON1_INIT 0x0000
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#define MII_VSC8244_EXTCON1_TX_SKEW_MASK 0x0c00
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#define MII_VSC8244_EXTCON1_RX_SKEW_MASK 0x0300
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#define MII_VSC8244_EXTCON1_TX_SKEW 0x0800
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#define MII_VSC8244_EXTCON1_RX_SKEW 0x0200
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/* Vitesse Interrupt Mask Register */
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#define MII_VSC8244_IMASK 0x19
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#define MII_VSC8244_IMASK_IEN 0x8000
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#define MII_VSC8244_IMASK_SPEED 0x4000
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#define MII_VSC8244_IMASK_LINK 0x2000
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#define MII_VSC8244_IMASK_DUPLEX 0x1000
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#define MII_VSC8244_IMASK_MASK 0xf000
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#define MII_VSC8221_IMASK_MASK 0xa000
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/* Vitesse Interrupt Status Register */
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#define MII_VSC8244_ISTAT 0x1a
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#define MII_VSC8244_ISTAT_STATUS 0x8000
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#define MII_VSC8244_ISTAT_SPEED 0x4000
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#define MII_VSC8244_ISTAT_LINK 0x2000
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#define MII_VSC8244_ISTAT_DUPLEX 0x1000
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/* Vitesse Auxiliary Control/Status Register */
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#define MII_VSC8244_AUX_CONSTAT 0x1c
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#define MII_VSC8244_AUXCONSTAT_INIT 0x0000
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#define MII_VSC8244_AUXCONSTAT_DUPLEX 0x0020
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#define MII_VSC8244_AUXCONSTAT_SPEED 0x0018
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#define MII_VSC8244_AUXCONSTAT_GBIT 0x0010
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#define MII_VSC8244_AUXCONSTAT_100 0x0008
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#define MII_VSC8221_AUXCONSTAT_INIT 0x0004 /* need to set this bit? */
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#define MII_VSC8221_AUXCONSTAT_RESERVED 0x0004
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/* Vitesse Extended Page Access Register */
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#define MII_VSC82X4_EXT_PAGE_ACCESS 0x1f
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/* Vitesse VSC8601 Extended PHY Control Register 1 */
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#define MII_VSC8601_EPHY_CTL 0x17
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#define MII_VSC8601_EPHY_CTL_RGMII_SKEW (1 << 8)
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#define PHY_ID_VSC8234 0x000fc620
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#define PHY_ID_VSC8244 0x000fc6c0
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#define PHY_ID_VSC8514 0x00070670
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#define PHY_ID_VSC8572 0x000704d0
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#define PHY_ID_VSC8574 0x000704a0
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#define PHY_ID_VSC8601 0x00070420
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#define PHY_ID_VSC7385 0x00070450
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#define PHY_ID_VSC7388 0x00070480
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#define PHY_ID_VSC7395 0x00070550
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#define PHY_ID_VSC7398 0x00070580
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#define PHY_ID_VSC8662 0x00070660
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#define PHY_ID_VSC8221 0x000fc550
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#define PHY_ID_VSC8211 0x000fc4b0
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MODULE_DESCRIPTION("Vitesse PHY driver");
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MODULE_AUTHOR("Kriston Carson");
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MODULE_LICENSE("GPL");
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static int vsc824x_add_skew(struct phy_device *phydev)
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{
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int err;
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int extcon;
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extcon = phy_read(phydev, MII_VSC8244_EXT_CON1);
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if (extcon < 0)
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return extcon;
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extcon &= ~(MII_VSC8244_EXTCON1_TX_SKEW_MASK |
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MII_VSC8244_EXTCON1_RX_SKEW_MASK);
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extcon |= (MII_VSC8244_EXTCON1_TX_SKEW |
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MII_VSC8244_EXTCON1_RX_SKEW);
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err = phy_write(phydev, MII_VSC8244_EXT_CON1, extcon);
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return err;
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}
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static int vsc824x_config_init(struct phy_device *phydev)
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{
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int err;
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err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
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MII_VSC8244_AUXCONSTAT_INIT);
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if (err < 0)
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return err;
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if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
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err = vsc824x_add_skew(phydev);
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return err;
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}
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#define VSC73XX_EXT_PAGE_ACCESS 0x1f
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static int vsc73xx_read_page(struct phy_device *phydev)
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{
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return __phy_read(phydev, VSC73XX_EXT_PAGE_ACCESS);
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}
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static int vsc73xx_write_page(struct phy_device *phydev, int page)
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{
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return __phy_write(phydev, VSC73XX_EXT_PAGE_ACCESS, page);
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}
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static void vsc73xx_config_init(struct phy_device *phydev)
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{
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/* Receiver init */
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x0c, 0x0300, 0x0200);
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phy_write(phydev, 0x1f, 0x0000);
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/* Config LEDs 0x61 */
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phy_modify(phydev, MII_TPISTATUS, 0xff00, 0x0061);
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}
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static int vsc738x_config_init(struct phy_device *phydev)
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{
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u16 rev;
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/* This magic sequence appear in the application note
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* "VSC7385/7388 PHY Configuration".
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*
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* Maybe one day we will get to know what it all means.
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*/
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x08, 0x0200, 0x0200);
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phy_write(phydev, 0x1f, 0x52b5);
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phy_write(phydev, 0x10, 0xb68a);
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phy_modify(phydev, 0x12, 0xff07, 0x0003);
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phy_modify(phydev, 0x11, 0x00ff, 0x00a2);
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phy_write(phydev, 0x10, 0x968a);
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x08, 0x0200, 0x0000);
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phy_write(phydev, 0x1f, 0x0000);
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/* Read revision */
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rev = phy_read(phydev, MII_PHYSID2);
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rev &= 0x0f;
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/* Special quirk for revision 0 */
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if (rev == 0) {
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x08, 0x0200, 0x0200);
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phy_write(phydev, 0x1f, 0x52b5);
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phy_write(phydev, 0x12, 0x0000);
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phy_write(phydev, 0x11, 0x0689);
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phy_write(phydev, 0x10, 0x8f92);
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phy_write(phydev, 0x1f, 0x52b5);
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phy_write(phydev, 0x12, 0x0000);
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phy_write(phydev, 0x11, 0x0e35);
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phy_write(phydev, 0x10, 0x9786);
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x08, 0x0200, 0x0000);
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phy_write(phydev, 0x17, 0xff80);
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phy_write(phydev, 0x17, 0x0000);
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}
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phy_write(phydev, 0x1f, 0x0000);
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phy_write(phydev, 0x12, 0x0048);
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if (rev == 0) {
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phy_write(phydev, 0x1f, 0x2a30);
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phy_write(phydev, 0x14, 0x6600);
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phy_write(phydev, 0x1f, 0x0000);
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phy_write(phydev, 0x18, 0xa24e);
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} else {
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x16, 0x0fc0, 0x0240);
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phy_modify(phydev, 0x14, 0x6000, 0x4000);
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/* bits 14-15 in extended register 0x14 controls DACG amplitude
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* 6 = -8%, 2 is hardware default
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*/
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phy_write(phydev, 0x1f, 0x0001);
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phy_modify(phydev, 0x14, 0xe000, 0x6000);
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phy_write(phydev, 0x1f, 0x0000);
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}
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vsc73xx_config_init(phydev);
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return genphy_config_init(phydev);
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}
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static int vsc739x_config_init(struct phy_device *phydev)
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{
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/* This magic sequence appears in the VSC7395 SparX-G5e application
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* note "VSC7395/VSC7398 PHY Configuration"
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*
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* Maybe one day we will get to know what it all means.
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*/
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x08, 0x0200, 0x0200);
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phy_write(phydev, 0x1f, 0x52b5);
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phy_write(phydev, 0x10, 0xb68a);
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phy_modify(phydev, 0x12, 0xff07, 0x0003);
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phy_modify(phydev, 0x11, 0x00ff, 0x00a2);
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phy_write(phydev, 0x10, 0x968a);
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x08, 0x0200, 0x0000);
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phy_write(phydev, 0x1f, 0x0000);
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phy_write(phydev, 0x1f, 0x0000);
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phy_write(phydev, 0x12, 0x0048);
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x16, 0x0fc0, 0x0240);
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phy_modify(phydev, 0x14, 0x6000, 0x4000);
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phy_write(phydev, 0x1f, 0x0001);
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phy_modify(phydev, 0x14, 0xe000, 0x6000);
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phy_write(phydev, 0x1f, 0x0000);
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vsc73xx_config_init(phydev);
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return genphy_config_init(phydev);
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}
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static int vsc73xx_config_aneg(struct phy_device *phydev)
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{
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/* The VSC73xx switches does not like to be instructed to
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* do autonegotiation in any way, it prefers that you just go
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* with the power-on/reset defaults. Writing some registers will
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* just make autonegotiation permanently fail.
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*/
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return 0;
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}
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/* This adds a skew for both TX and RX clocks, so the skew should only be
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* applied to "rgmii-id" interfaces. It may not work as expected
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* on "rgmii-txid", "rgmii-rxid" or "rgmii" interfaces. */
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static int vsc8601_add_skew(struct phy_device *phydev)
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{
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int ret;
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ret = phy_read(phydev, MII_VSC8601_EPHY_CTL);
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if (ret < 0)
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return ret;
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ret |= MII_VSC8601_EPHY_CTL_RGMII_SKEW;
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return phy_write(phydev, MII_VSC8601_EPHY_CTL, ret);
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}
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static int vsc8601_config_init(struct phy_device *phydev)
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{
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int ret = 0;
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if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
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ret = vsc8601_add_skew(phydev);
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if (ret < 0)
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return ret;
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return genphy_config_init(phydev);
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}
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static int vsc824x_ack_interrupt(struct phy_device *phydev)
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{
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int err = 0;
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/* Don't bother to ACK the interrupts if interrupts
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* are disabled. The 824x cannot clear the interrupts
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* if they are disabled.
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*/
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if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
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err = phy_read(phydev, MII_VSC8244_ISTAT);
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return (err < 0) ? err : 0;
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}
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static int vsc82xx_config_intr(struct phy_device *phydev)
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{
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int err;
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if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
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err = phy_write(phydev, MII_VSC8244_IMASK,
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(phydev->drv->phy_id == PHY_ID_VSC8234 ||
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phydev->drv->phy_id == PHY_ID_VSC8244 ||
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phydev->drv->phy_id == PHY_ID_VSC8514 ||
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phydev->drv->phy_id == PHY_ID_VSC8572 ||
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phydev->drv->phy_id == PHY_ID_VSC8574 ||
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phydev->drv->phy_id == PHY_ID_VSC8601) ?
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MII_VSC8244_IMASK_MASK :
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MII_VSC8221_IMASK_MASK);
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else {
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/* The Vitesse PHY cannot clear the interrupt
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* once it has disabled them, so we clear them first
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*/
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err = phy_read(phydev, MII_VSC8244_ISTAT);
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if (err < 0)
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return err;
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err = phy_write(phydev, MII_VSC8244_IMASK, 0);
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}
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return err;
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}
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static int vsc8221_config_init(struct phy_device *phydev)
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{
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int err;
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err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
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MII_VSC8221_AUXCONSTAT_INIT);
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return err;
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/* Perhaps we should set EXT_CON1 based on the interface?
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* Options are 802.3Z SerDes or SGMII
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*/
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}
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/* vsc82x4_config_autocross_enable - Enable auto MDI/MDI-X for forced links
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* @phydev: target phy_device struct
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*
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* Enable auto MDI/MDI-X when in 10/100 forced link speeds by writing
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* special values in the VSC8234/VSC8244 extended reserved registers
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*/
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static int vsc82x4_config_autocross_enable(struct phy_device *phydev)
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{
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int ret;
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if (phydev->autoneg == AUTONEG_ENABLE || phydev->speed > SPEED_100)
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return 0;
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/* map extended registers set 0x10 - 0x1e */
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ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x52b5);
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if (ret >= 0)
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ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_18E, 0x0012);
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if (ret >= 0)
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ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_17E, 0x2803);
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if (ret >= 0)
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ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_16E, 0x87fa);
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/* map standard registers set 0x10 - 0x1e */
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if (ret >= 0)
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ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x0000);
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else
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phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x0000);
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return ret;
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}
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/* vsc82x4_config_aneg - restart auto-negotiation or write BMCR
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* @phydev: target phy_device struct
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*
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* Description: If auto-negotiation is enabled, we configure the
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* advertising, and then restart auto-negotiation. If it is not
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* enabled, then we write the BMCR and also start the auto
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* MDI/MDI-X feature
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*/
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static int vsc82x4_config_aneg(struct phy_device *phydev)
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{
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int ret;
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/* Enable auto MDI/MDI-X when in 10/100 forced link speeds by
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* writing special values in the VSC8234 extended reserved registers
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*/
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if (phydev->autoneg != AUTONEG_ENABLE && phydev->speed <= SPEED_100) {
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ret = genphy_setup_forced(phydev);
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if (ret < 0) /* error */
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return ret;
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return vsc82x4_config_autocross_enable(phydev);
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}
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return genphy_config_aneg(phydev);
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}
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/* Vitesse 82xx */
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static struct phy_driver vsc82xx_driver[] = {
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{
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.phy_id = PHY_ID_VSC8234,
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.name = "Vitesse VSC8234",
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.phy_id_mask = 0x000ffff0,
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.features = PHY_GBIT_FEATURES,
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.flags = PHY_HAS_INTERRUPT,
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.config_init = &vsc824x_config_init,
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.config_aneg = &vsc82x4_config_aneg,
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.ack_interrupt = &vsc824x_ack_interrupt,
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.config_intr = &vsc82xx_config_intr,
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}, {
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.phy_id = PHY_ID_VSC8244,
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.name = "Vitesse VSC8244",
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.phy_id_mask = 0x000fffc0,
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.features = PHY_GBIT_FEATURES,
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.flags = PHY_HAS_INTERRUPT,
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.config_init = &vsc824x_config_init,
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.config_aneg = &vsc82x4_config_aneg,
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.ack_interrupt = &vsc824x_ack_interrupt,
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.config_intr = &vsc82xx_config_intr,
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}, {
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.phy_id = PHY_ID_VSC8514,
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.name = "Vitesse VSC8514",
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.phy_id_mask = 0x000ffff0,
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.features = PHY_GBIT_FEATURES,
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.flags = PHY_HAS_INTERRUPT,
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.config_init = &vsc824x_config_init,
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.config_aneg = &vsc82x4_config_aneg,
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.ack_interrupt = &vsc824x_ack_interrupt,
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.config_intr = &vsc82xx_config_intr,
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}, {
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.phy_id = PHY_ID_VSC8572,
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.name = "Vitesse VSC8572",
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.phy_id_mask = 0x000ffff0,
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.features = PHY_GBIT_FEATURES,
|
|
.flags = PHY_HAS_INTERRUPT,
|
|
.config_init = &vsc824x_config_init,
|
|
.config_aneg = &vsc82x4_config_aneg,
|
|
.ack_interrupt = &vsc824x_ack_interrupt,
|
|
.config_intr = &vsc82xx_config_intr,
|
|
}, {
|
|
.phy_id = PHY_ID_VSC8574,
|
|
.name = "Vitesse VSC8574",
|
|
.phy_id_mask = 0x000ffff0,
|
|
.features = PHY_GBIT_FEATURES,
|
|
.flags = PHY_HAS_INTERRUPT,
|
|
.config_init = &vsc824x_config_init,
|
|
.config_aneg = &vsc82x4_config_aneg,
|
|
.ack_interrupt = &vsc824x_ack_interrupt,
|
|
.config_intr = &vsc82xx_config_intr,
|
|
}, {
|
|
.phy_id = PHY_ID_VSC8601,
|
|
.name = "Vitesse VSC8601",
|
|
.phy_id_mask = 0x000ffff0,
|
|
.features = PHY_GBIT_FEATURES,
|
|
.flags = PHY_HAS_INTERRUPT,
|
|
.config_init = &vsc8601_config_init,
|
|
.ack_interrupt = &vsc824x_ack_interrupt,
|
|
.config_intr = &vsc82xx_config_intr,
|
|
}, {
|
|
.phy_id = PHY_ID_VSC7385,
|
|
.name = "Vitesse VSC7385",
|
|
.phy_id_mask = 0x000ffff0,
|
|
.features = PHY_GBIT_FEATURES,
|
|
.config_init = vsc738x_config_init,
|
|
.config_aneg = vsc73xx_config_aneg,
|
|
.read_page = vsc73xx_read_page,
|
|
.write_page = vsc73xx_write_page,
|
|
}, {
|
|
.phy_id = PHY_ID_VSC7388,
|
|
.name = "Vitesse VSC7388",
|
|
.phy_id_mask = 0x000ffff0,
|
|
.features = PHY_GBIT_FEATURES,
|
|
.config_init = vsc738x_config_init,
|
|
.config_aneg = vsc73xx_config_aneg,
|
|
.read_page = vsc73xx_read_page,
|
|
.write_page = vsc73xx_write_page,
|
|
}, {
|
|
.phy_id = PHY_ID_VSC7395,
|
|
.name = "Vitesse VSC7395",
|
|
.phy_id_mask = 0x000ffff0,
|
|
.features = PHY_GBIT_FEATURES,
|
|
.config_init = vsc739x_config_init,
|
|
.config_aneg = vsc73xx_config_aneg,
|
|
.read_page = vsc73xx_read_page,
|
|
.write_page = vsc73xx_write_page,
|
|
}, {
|
|
.phy_id = PHY_ID_VSC7398,
|
|
.name = "Vitesse VSC7398",
|
|
.phy_id_mask = 0x000ffff0,
|
|
.features = PHY_GBIT_FEATURES,
|
|
.config_init = vsc739x_config_init,
|
|
.config_aneg = vsc73xx_config_aneg,
|
|
.read_page = vsc73xx_read_page,
|
|
.write_page = vsc73xx_write_page,
|
|
}, {
|
|
.phy_id = PHY_ID_VSC8662,
|
|
.name = "Vitesse VSC8662",
|
|
.phy_id_mask = 0x000ffff0,
|
|
.features = PHY_GBIT_FEATURES,
|
|
.flags = PHY_HAS_INTERRUPT,
|
|
.config_init = &vsc824x_config_init,
|
|
.config_aneg = &vsc82x4_config_aneg,
|
|
.ack_interrupt = &vsc824x_ack_interrupt,
|
|
.config_intr = &vsc82xx_config_intr,
|
|
}, {
|
|
/* Vitesse 8221 */
|
|
.phy_id = PHY_ID_VSC8221,
|
|
.phy_id_mask = 0x000ffff0,
|
|
.name = "Vitesse VSC8221",
|
|
.features = PHY_GBIT_FEATURES,
|
|
.flags = PHY_HAS_INTERRUPT,
|
|
.config_init = &vsc8221_config_init,
|
|
.ack_interrupt = &vsc824x_ack_interrupt,
|
|
.config_intr = &vsc82xx_config_intr,
|
|
}, {
|
|
/* Vitesse 8211 */
|
|
.phy_id = PHY_ID_VSC8211,
|
|
.phy_id_mask = 0x000ffff0,
|
|
.name = "Vitesse VSC8211",
|
|
.features = PHY_GBIT_FEATURES,
|
|
.flags = PHY_HAS_INTERRUPT,
|
|
.config_init = &vsc8221_config_init,
|
|
.ack_interrupt = &vsc824x_ack_interrupt,
|
|
.config_intr = &vsc82xx_config_intr,
|
|
} };
|
|
|
|
module_phy_driver(vsc82xx_driver);
|
|
|
|
static struct mdio_device_id __maybe_unused vitesse_tbl[] = {
|
|
{ PHY_ID_VSC8234, 0x000ffff0 },
|
|
{ PHY_ID_VSC8244, 0x000fffc0 },
|
|
{ PHY_ID_VSC8514, 0x000ffff0 },
|
|
{ PHY_ID_VSC8572, 0x000ffff0 },
|
|
{ PHY_ID_VSC8574, 0x000ffff0 },
|
|
{ PHY_ID_VSC7385, 0x000ffff0 },
|
|
{ PHY_ID_VSC7388, 0x000ffff0 },
|
|
{ PHY_ID_VSC7395, 0x000ffff0 },
|
|
{ PHY_ID_VSC7398, 0x000ffff0 },
|
|
{ PHY_ID_VSC8662, 0x000ffff0 },
|
|
{ PHY_ID_VSC8221, 0x000ffff0 },
|
|
{ PHY_ID_VSC8211, 0x000ffff0 },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(mdio, vitesse_tbl);
|