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https://github.com/brain-hackers/u-boot-brain
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![Mike Nuss](/assets/img/avatar_default.png)
Every now and then a Sequoia board (or equivalent hardware) had problems connecting to a Gigabit capable network interface. There were differences in the PHY setup between Linux and U-Boot. This patch fixes the problem. Apparently "remote fault" is being set, which signals to some devices (on the other end of the cable) that a fault has occurred, while other devices ignore it. I believe the RF bit was causing the issue, but I removed T4 also, to match up with Linux. Signed-off-by: Mike Nuss <mike@terascala.com>
370 lines
10 KiB
C
370 lines
10 KiB
C
/*-----------------------------------------------------------------------------+
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| This source code has been made available to you by IBM on an AS-IS
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| basis. Anyone receiving this source is licensed under IBM
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| copyrights to use it in any way he or she deems fit, including
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| copying it, modifying it, compiling it, and redistributing it either
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| with or without modifications. No license under IBM patents or
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| patent applications is to be implied by the copyright license.
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| Any user of this software should understand that IBM cannot provide
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| technical support for this software and will not be responsible for
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| any consequences resulting from the use of this software.
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| Any person who transfers this source code or any derivative work
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| must include the IBM copyright notice, this paragraph, and the
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| preceding two paragraphs in the transferred software.
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| COPYRIGHT I B M CORPORATION 1995
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| LICENSED MATERIAL - PROGRAM PROPERTY OF I B M
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+-----------------------------------------------------------------------------*/
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/*-----------------------------------------------------------------------------+
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| File Name: miiphy.c
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| Function: This module has utilities for accessing the MII PHY through
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| the EMAC3 macro.
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| Author: Mark Wisner
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+-----------------------------------------------------------------------------*/
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#include <common.h>
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#include <asm/processor.h>
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#include <asm/io.h>
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#include <ppc_asm.tmpl>
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#include <commproc.h>
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#include <ppc4xx_enet.h>
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#include <405_mal.h>
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#include <miiphy.h>
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#undef ET_DEBUG
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/***********************************************************/
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/* Dump out to the screen PHY regs */
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/***********************************************************/
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void miiphy_dump (char *devname, unsigned char addr)
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{
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unsigned long i;
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unsigned short data;
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for (i = 0; i < 0x1A; i++) {
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if (miiphy_read (devname, addr, i, &data)) {
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printf ("read error for reg %lx\n", i);
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return;
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}
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printf ("Phy reg %lx ==> %4x\n", i, data);
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/* jump to the next set of regs */
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if (i == 0x07)
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i = 0x0f;
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} /* end for loop */
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} /* end dump */
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/***********************************************************/
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/* (Re)start autonegotiation */
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/***********************************************************/
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int phy_setup_aneg (char *devname, unsigned char addr)
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{
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u16 bmcr;
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#if defined(CONFIG_PHY_DYNAMIC_ANEG)
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/*
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* Set up advertisement based on capablilities reported by the PHY.
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* This should work for both copper and fiber.
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*/
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u16 bmsr;
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#if defined(CONFIG_PHY_GIGE)
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u16 exsr = 0x0000;
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#endif
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miiphy_read (devname, addr, PHY_BMSR, &bmsr);
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#if defined(CONFIG_PHY_GIGE)
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if (bmsr & PHY_BMSR_EXT_STAT)
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miiphy_read (devname, addr, PHY_EXSR, &exsr);
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if (exsr & (PHY_EXSR_1000XF | PHY_EXSR_1000XH)) {
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/* 1000BASE-X */
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u16 anar = 0x0000;
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if (exsr & PHY_EXSR_1000XF)
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anar |= PHY_X_ANLPAR_FD;
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if (exsr & PHY_EXSR_1000XH)
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anar |= PHY_X_ANLPAR_HD;
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miiphy_write (devname, addr, PHY_ANAR, anar);
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} else
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#endif
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{
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u16 anar, btcr;
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miiphy_read (devname, addr, PHY_ANAR, &anar);
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anar &= ~(0x5000 | PHY_ANLPAR_T4 | PHY_ANLPAR_TXFD |
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PHY_ANLPAR_TX | PHY_ANLPAR_10FD | PHY_ANLPAR_10);
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miiphy_read (devname, addr, PHY_1000BTCR, &btcr);
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btcr &= ~(0x00FF | PHY_1000BTCR_1000FD | PHY_1000BTCR_1000HD);
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if (bmsr & PHY_BMSR_100T4)
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anar |= PHY_ANLPAR_T4;
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if (bmsr & PHY_BMSR_100TXF)
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anar |= PHY_ANLPAR_TXFD;
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if (bmsr & PHY_BMSR_100TXH)
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anar |= PHY_ANLPAR_TX;
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if (bmsr & PHY_BMSR_10TF)
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anar |= PHY_ANLPAR_10FD;
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if (bmsr & PHY_BMSR_10TH)
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anar |= PHY_ANLPAR_10;
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miiphy_write (devname, addr, PHY_ANAR, anar);
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#if defined(CONFIG_PHY_GIGE)
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if (exsr & PHY_EXSR_1000TF)
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btcr |= PHY_1000BTCR_1000FD;
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if (exsr & PHY_EXSR_1000TH)
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btcr |= PHY_1000BTCR_1000HD;
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miiphy_write (devname, addr, PHY_1000BTCR, btcr);
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#endif
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}
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#else /* defined(CONFIG_PHY_DYNAMIC_ANEG) */
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/*
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* Set up standard advertisement
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*/
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u16 adv;
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miiphy_read (devname, addr, PHY_ANAR, &adv);
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adv |= (PHY_ANLPAR_ACK | PHY_ANLPAR_TXFD | PHY_ANLPAR_TX |
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PHY_ANLPAR_10FD | PHY_ANLPAR_10);
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miiphy_write (devname, addr, PHY_ANAR, adv);
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miiphy_read (devname, addr, PHY_1000BTCR, &adv);
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adv |= (0x0300);
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miiphy_write (devname, addr, PHY_1000BTCR, adv);
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#endif /* defined(CONFIG_PHY_DYNAMIC_ANEG) */
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/* Start/Restart aneg */
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miiphy_read (devname, addr, PHY_BMCR, &bmcr);
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bmcr |= (PHY_BMCR_AUTON | PHY_BMCR_RST_NEG);
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miiphy_write (devname, addr, PHY_BMCR, bmcr);
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return 0;
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}
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/***********************************************************/
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/* read a phy reg and return the value with a rc */
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/***********************************************************/
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unsigned int miiphy_getemac_offset (void)
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{
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#if (defined(CONFIG_440) && !defined(CONFIG_440SP) && !defined(CONFIG_440SPE)) && defined(CONFIG_NET_MULTI)
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unsigned long zmii;
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unsigned long eoffset;
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/* Need to find out which mdi port we're using */
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zmii = in_be32((void *)ZMII_FER);
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if (zmii & (ZMII_FER_MDI << ZMII_FER_V (0)))
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/* using port 0 */
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eoffset = 0;
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else if (zmii & (ZMII_FER_MDI << ZMII_FER_V (1)))
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/* using port 1 */
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eoffset = 0x100;
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else if (zmii & (ZMII_FER_MDI << ZMII_FER_V (2)))
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/* using port 2 */
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eoffset = 0x400;
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else if (zmii & (ZMII_FER_MDI << ZMII_FER_V (3)))
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/* using port 3 */
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eoffset = 0x600;
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else {
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/* None of the mdi ports are enabled! */
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/* enable port 0 */
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zmii |= ZMII_FER_MDI << ZMII_FER_V (0);
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out_be32((void *)ZMII_FER, zmii);
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eoffset = 0;
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/* need to soft reset port 0 */
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zmii = in_be32((void *)EMAC_M0);
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zmii |= EMAC_M0_SRST;
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out_be32((void *)EMAC_M0, zmii);
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}
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return (eoffset);
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#else
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#if defined(CONFIG_NET_MULTI) && defined(CONFIG_405EX)
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unsigned long rgmii;
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int devnum = 1;
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rgmii = in_be32((void *)RGMII_FER);
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if (rgmii & (1 << (19 - devnum)))
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return 0x100;
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#endif
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return 0;
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#endif
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}
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int emac4xx_miiphy_read (char *devname, unsigned char addr, unsigned char reg,
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unsigned short *value)
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{
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unsigned long sta_reg; /* STA scratch area */
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unsigned long i;
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unsigned long emac_reg;
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emac_reg = miiphy_getemac_offset ();
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/* see if it is ready for 1000 nsec */
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i = 0;
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/* see if it is ready for sec */
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while ((in_be32((void *)EMAC_STACR + emac_reg) & EMAC_STACR_OC) ==
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EMAC_STACR_OC_MASK) {
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udelay (7);
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if (i > 5) {
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#ifdef ET_DEBUG
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sta_reg = in_be32((void *)EMAC_STACR + emac_reg);
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printf ("read : EMAC_STACR=0x%0x\n", sta_reg); /* test-only */
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printf ("read err 1\n");
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#endif
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return -1;
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}
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i++;
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}
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sta_reg = reg; /* reg address */
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/* set clock (50Mhz) and read flags */
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#if defined(CONFIG_440GX) || defined(CONFIG_440SPE) || \
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defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
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defined(CONFIG_405EX)
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#if defined(CONFIG_IBM_EMAC4_V4) /* EMAC4 V4 changed bit setting */
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sta_reg = (sta_reg & ~EMAC_STACR_OP_MASK) | EMAC_STACR_READ;
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#else
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sta_reg |= EMAC_STACR_READ;
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#endif
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#else
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sta_reg = (sta_reg | EMAC_STACR_READ) & ~EMAC_STACR_CLK_100MHZ;
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#endif
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#if defined(CONFIG_PHY_CLK_FREQ) && !defined(CONFIG_440GX) && \
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!defined(CONFIG_440SP) && !defined(CONFIG_440SPE) && \
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!defined(CONFIG_440EPX) && !defined(CONFIG_440GRX) && \
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!defined(CONFIG_405EX)
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sta_reg = sta_reg | CONFIG_PHY_CLK_FREQ;
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#endif
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sta_reg = sta_reg | (addr << 5); /* Phy address */
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sta_reg = sta_reg | EMAC_STACR_OC_MASK; /* new IBM emac v4 */
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out_be32((void *)EMAC_STACR + emac_reg, sta_reg);
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#ifdef ET_DEBUG
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printf ("a2: write: EMAC_STACR=0x%0x\n", sta_reg); /* test-only */
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#endif
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sta_reg = in_be32((void *)EMAC_STACR + emac_reg);
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#ifdef ET_DEBUG
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printf ("a21: read : EMAC_STACR=0x%0x\n", sta_reg); /* test-only */
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#endif
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i = 0;
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while ((sta_reg & EMAC_STACR_OC) == EMAC_STACR_OC_MASK) {
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udelay (7);
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if (i > 5)
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return -1;
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i++;
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sta_reg = in_be32((void *)EMAC_STACR + emac_reg);
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#ifdef ET_DEBUG
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printf ("a22: read : EMAC_STACR=0x%0x\n", sta_reg); /* test-only */
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#endif
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}
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if ((sta_reg & EMAC_STACR_PHYE) != 0)
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return -1;
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*value = *(short *)(&sta_reg);
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return 0;
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} /* phy_read */
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/***********************************************************/
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/* write a phy reg and return the value with a rc */
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/***********************************************************/
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int emac4xx_miiphy_write (char *devname, unsigned char addr, unsigned char reg,
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unsigned short value)
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{
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unsigned long sta_reg; /* STA scratch area */
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unsigned long i;
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unsigned long emac_reg;
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emac_reg = miiphy_getemac_offset ();
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/* see if it is ready for 1000 nsec */
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i = 0;
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while ((in_be32((void *)EMAC_STACR + emac_reg) & EMAC_STACR_OC) ==
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EMAC_STACR_OC_MASK) {
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if (i > 5)
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return -1;
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udelay (7);
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i++;
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}
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sta_reg = 0;
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sta_reg = reg; /* reg address */
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/* set clock (50Mhz) and read flags */
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#if defined(CONFIG_440GX) || defined(CONFIG_440SPE) || \
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defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
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defined(CONFIG_405EX)
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#if defined(CONFIG_IBM_EMAC4_V4) /* EMAC4 V4 changed bit setting */
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sta_reg = (sta_reg & ~EMAC_STACR_OP_MASK) | EMAC_STACR_WRITE;
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#else
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sta_reg |= EMAC_STACR_WRITE;
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#endif
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#else
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sta_reg = (sta_reg | EMAC_STACR_WRITE) & ~EMAC_STACR_CLK_100MHZ;
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#endif
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#if defined(CONFIG_PHY_CLK_FREQ) && !defined(CONFIG_440GX) && \
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!defined(CONFIG_440SP) && !defined(CONFIG_440SPE) && \
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!defined(CONFIG_440EPX) && !defined(CONFIG_440GRX) && \
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!defined(CONFIG_405EX)
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sta_reg = sta_reg | CONFIG_PHY_CLK_FREQ; /* Set clock frequency (PLB freq. dependend) */
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#endif
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sta_reg = sta_reg | ((unsigned long)addr << 5); /* Phy address */
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sta_reg = sta_reg | EMAC_STACR_OC_MASK; /* new IBM emac v4 */
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memcpy (&sta_reg, &value, 2); /* put in data */
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out_be32((void *)EMAC_STACR + emac_reg, sta_reg);
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/* wait for completion */
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i = 0;
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sta_reg = in_be32((void *)EMAC_STACR + emac_reg);
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#ifdef ET_DEBUG
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printf ("a31: read : EMAC_STACR=0x%0x\n", sta_reg); /* test-only */
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#endif
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while ((sta_reg & EMAC_STACR_OC) == EMAC_STACR_OC_MASK) {
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udelay (7);
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if (i > 5)
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return -1;
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i++;
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sta_reg = in_be32((void *)EMAC_STACR + emac_reg);
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#ifdef ET_DEBUG
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printf ("a32: read : EMAC_STACR=0x%0x\n", sta_reg); /* test-only */
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#endif
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}
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if ((sta_reg & EMAC_STACR_PHYE) != 0)
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return -1;
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return 0;
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} /* phy_write */
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