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u-boot/cpu/ppc4xx/miiphy.c
Marian Balakowicz 6c5879f380 Add support for AMCC 440SPe CPU based eval board (Yucca).
2006-06-30 16:30:46 +02:00

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/*-----------------------------------------------------------------------------+
|
| This source code has been made available to you by IBM on an AS-IS
| basis. Anyone receiving this source is licensed under IBM
| copyrights to use it in any way he or she deems fit, including
| copying it, modifying it, compiling it, and redistributing it either
| with or without modifications. No license under IBM patents or
| patent applications is to be implied by the copyright license.
|
| Any user of this software should understand that IBM cannot provide
| technical support for this software and will not be responsible for
| any consequences resulting from the use of this software.
|
| Any person who transfers this source code or any derivative work
| must include the IBM copyright notice, this paragraph, and the
| preceding two paragraphs in the transferred software.
|
| COPYRIGHT I B M CORPORATION 1995
| LICENSED MATERIAL - PROGRAM PROPERTY OF I B M
+-----------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------+
|
| File Name: miiphy.c
|
| Function: This module has utilities for accessing the MII PHY through
| the EMAC3 macro.
|
| Author: Mark Wisner
|
| Change Activity-
|
| Date Description of Change BY
| --------- --------------------- ---
| 05-May-99 Created MKW
| 01-Jul-99 Changed clock setting of sta_reg from 66Mhz to 50Mhz to
| better match OPB speed. Also modified delay times. JWB
| 29-Jul-99 Added Full duplex support MKW
| 24-Aug-99 Removed printf from dp83843_duplex() JWB
| 19-Jul-00 Ported to esd cpci405 sr
| 23-Dec-03 Ported from miiphy.c to 440GX Travis Sawyer TBS
| <travis.sawyer@sandburst.com>
|
+-----------------------------------------------------------------------------*/
#include <common.h>
#include <asm/processor.h>
#include <ppc_asm.tmpl>
#include <commproc.h>
#include <ppc4xx_enet.h>
#include <405_mal.h>
#include <miiphy.h>
#undef ET_DEBUG
/***********************************************************/
/* Dump out to the screen PHY regs */
/***********************************************************/
void miiphy_dump (char *devname, unsigned char addr)
{
unsigned long i;
unsigned short data;
for (i = 0; i < 0x1A; i++) {
if (miiphy_read (devname, addr, i, &data)) {
printf ("read error for reg %lx\n", i);
return;
}
printf ("Phy reg %lx ==> %4x\n", i, data);
/* jump to the next set of regs */
if (i == 0x07)
i = 0x0f;
} /* end for loop */
} /* end dump */
/***********************************************************/
/* (Re)start autonegotiation */
/***********************************************************/
int phy_setup_aneg (char *devname, unsigned char addr)
{
unsigned short ctl, adv;
/* Setup standard advertise */
miiphy_read (devname, addr, PHY_ANAR, &adv);
adv |= (PHY_ANLPAR_ACK | PHY_ANLPAR_RF | PHY_ANLPAR_T4 |
PHY_ANLPAR_TXFD | PHY_ANLPAR_TX | PHY_ANLPAR_10FD |
PHY_ANLPAR_10);
miiphy_write (devname, addr, PHY_ANAR, adv);
miiphy_read (devname, addr, PHY_1000BTCR, &adv);
adv |= (0x0300);
miiphy_write (devname, addr, PHY_1000BTCR, adv);
/* Start/Restart aneg */
miiphy_read (devname, addr, PHY_BMCR, &ctl);
ctl |= (PHY_BMCR_AUTON | PHY_BMCR_RST_NEG);
miiphy_write (devname, addr, PHY_BMCR, ctl);
return 0;
}
/***********************************************************/
/* read a phy reg and return the value with a rc */
/***********************************************************/
unsigned int miiphy_getemac_offset (void)
{
#if (defined(CONFIG_440) && !defined(CONFIG_440SP) && !defined(CONFIG_440SPE)) && defined(CONFIG_NET_MULTI)
unsigned long zmii;
unsigned long eoffset;
/* Need to find out which mdi port we're using */
zmii = in32 (ZMII_FER);
if (zmii & (ZMII_FER_MDI << ZMII_FER_V (0))) {
/* using port 0 */
eoffset = 0;
} else if (zmii & (ZMII_FER_MDI << ZMII_FER_V (1))) {
/* using port 1 */
eoffset = 0x100;
} else if (zmii & (ZMII_FER_MDI << ZMII_FER_V (2))) {
/* using port 2 */
eoffset = 0x400;
} else if (zmii & (ZMII_FER_MDI << ZMII_FER_V (3))) {
/* using port 3 */
eoffset = 0x600;
} else {
/* None of the mdi ports are enabled! */
/* enable port 0 */
zmii |= ZMII_FER_MDI << ZMII_FER_V (0);
out32 (ZMII_FER, zmii);
eoffset = 0;
/* need to soft reset port 0 */
zmii = in32 (EMAC_M0);
zmii |= EMAC_M0_SRST;
out32 (EMAC_M0, zmii);
}
return (eoffset);
#else
return 0;
#endif
}
int emac4xx_miiphy_read (char *devname, unsigned char addr,
unsigned char reg, unsigned short *value)
{
unsigned long sta_reg; /* STA scratch area */
unsigned long i;
unsigned long emac_reg;
emac_reg = miiphy_getemac_offset ();
/* see if it is ready for 1000 nsec */
i = 0;
/* see if it is ready for sec */
while ((in32 (EMAC_STACR + emac_reg) & EMAC_STACR_OC) == EMAC_STACR_OC_MASK) {
udelay (7);
if (i > 5) {
#ifdef ET_DEBUG
sta_reg = in32 (EMAC_STACR + emac_reg);
printf ("read : EMAC_STACR=0x%0x\n", sta_reg); /* test-only */
printf ("read err 1\n");
#endif
return -1;
}
i++;
}
sta_reg = reg; /* reg address */
/* set clock (50Mhz) and read flags */
#if defined(CONFIG_440GX) || defined(CONFIG_440SPE)
#if defined(CONFIG_IBM_EMAC4_V4) /* EMAC4 V4 changed bit setting */
sta_reg = (sta_reg & ~EMAC_STACR_OP_MASK) | EMAC_STACR_READ;
#else
sta_reg |= EMAC_STACR_READ;
#endif
#else
sta_reg = (sta_reg | EMAC_STACR_READ) & ~EMAC_STACR_CLK_100MHZ;
#endif
#if defined(CONFIG_PHY_CLK_FREQ) && !defined(CONFIG_440GX) && !defined(CONFIG__440SP) && !defined(CONFIG__440SPE)
sta_reg = sta_reg | CONFIG_PHY_CLK_FREQ;
#endif
sta_reg = sta_reg | (addr << 5); /* Phy address */
sta_reg = sta_reg | EMAC_STACR_OC_MASK; /* new IBM emac v4 */
out32 (EMAC_STACR + emac_reg, sta_reg);
#ifdef ET_DEBUG
printf ("a2: write: EMAC_STACR=0x%0x\n", sta_reg); /* test-only */
#endif
sta_reg = in32 (EMAC_STACR + emac_reg);
#ifdef ET_DEBUG
printf ("a21: read : EMAC_STACR=0x%0x\n", sta_reg); /* test-only */
#endif
i = 0;
while ((sta_reg & EMAC_STACR_OC) == EMAC_STACR_OC_MASK) {
udelay (7);
if (i > 5) {
return -1;
}
i++;
sta_reg = in32 (EMAC_STACR + emac_reg);
#ifdef ET_DEBUG
printf ("a22: read : EMAC_STACR=0x%0x\n", sta_reg); /* test-only */
#endif
}
if ((sta_reg & EMAC_STACR_PHYE) != 0) {
return -1;
}
*value = *(short *) (&sta_reg);
return 0;
} /* phy_read */
/***********************************************************/
/* write a phy reg and return the value with a rc */
/***********************************************************/
int emac4xx_miiphy_write (char *devname, unsigned char addr,
unsigned char reg, unsigned short value)
{
unsigned long sta_reg; /* STA scratch area */
unsigned long i;
unsigned long emac_reg;
emac_reg = miiphy_getemac_offset ();
/* see if it is ready for 1000 nsec */
i = 0;
while ((in32 (EMAC_STACR + emac_reg) & EMAC_STACR_OC) == EMAC_STACR_OC_MASK) {
if (i > 5)
return -1;
udelay (7);
i++;
}
sta_reg = 0;
sta_reg = reg; /* reg address */
/* set clock (50Mhz) and read flags */
#if defined(CONFIG_440GX) || defined(CONFIG_440SPE)
#if defined(CONFIG_IBM_EMAC4_V4) /* EMAC4 V4 changed bit setting */
sta_reg = (sta_reg & ~EMAC_STACR_OP_MASK) | EMAC_STACR_WRITE;
#else
sta_reg |= EMAC_STACR_WRITE;
#endif
#else
sta_reg = (sta_reg | EMAC_STACR_WRITE) & ~EMAC_STACR_CLK_100MHZ;
#endif
#if defined(CONFIG_PHY_CLK_FREQ) && !defined(CONFIG_440GX) && !defined(CONFIG__440SP) && !defined(CONFIG__440SPE)
sta_reg = sta_reg | CONFIG_PHY_CLK_FREQ; /* Set clock frequency (PLB freq. dependend) */
#endif
sta_reg = sta_reg | ((unsigned long) addr << 5);/* Phy address */
sta_reg = sta_reg | EMAC_STACR_OC_MASK; /* new IBM emac v4 */
memcpy (&sta_reg, &value, 2); /* put in data */
out32 (EMAC_STACR + emac_reg, sta_reg);
/* wait for completion */
i = 0;
sta_reg = in32 (EMAC_STACR + emac_reg);
#ifdef ET_DEBUG
printf ("a31: read : EMAC_STACR=0x%0x\n", sta_reg); /* test-only */
#endif
while ((sta_reg & EMAC_STACR_OC) == EMAC_STACR_OC_MASK) {
udelay (7);
if (i > 5)
return -1;
i++;
sta_reg = in32 (EMAC_STACR + emac_reg);
#ifdef ET_DEBUG
printf ("a32: read : EMAC_STACR=0x%0x\n", sta_reg); /* test-only */
#endif
}
if ((sta_reg & EMAC_STACR_PHYE) != 0)
return -1;
return 0;
} /* phy_write */
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