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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
|
+-----------------------------------------------------------------------------*/
#include <common.h>
#include <asm/processor.h>
#include <ppc_asm.tmpl>
#include <commproc.h>
#include <405gp_enet.h>
#include <405_mal.h>
#include <miiphy.h>
#if defined(CONFIG_405GP) || defined(CONFIG_440) || defined(CONFIG_405EP)
/***********************************************************/
/* Dump out to the screen PHY regs */
/***********************************************************/
void miiphy_dump (unsigned char addr)
{
unsigned long i;
unsigned short data;
for (i = 0; i < 0x1A; i++) {
if (miiphy_read (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 */
/***********************************************************/
/* read a phy reg and return the value with a rc */
/***********************************************************/
int miiphy_read (unsigned char addr, unsigned char reg,
unsigned short *value)
{
unsigned long sta_reg; /* STA scratch area */
unsigned long i;
/* see if it is ready for 1000 nsec */
i = 0;
/* see if it is ready for sec */
while ((in32 (EMAC_STACR) & EMAC_STACR_OC) == 0) {
udelay (7);
if (i > 5) {
#if 0 /* test-only */
printf ("read err 1\n");
#endif
return -1;
}
i++;
}
sta_reg = reg; /* reg address */
/* set clock (50Mhz) and read flags */
sta_reg = (sta_reg | EMAC_STACR_READ) & ~EMAC_STACR_CLK_100MHZ;
#ifdef CONFIG_PHY_CLK_FREQ
sta_reg = sta_reg | CONFIG_PHY_CLK_FREQ;
#endif
sta_reg = sta_reg | (addr << 5); /* Phy address */
out32 (EMAC_STACR, sta_reg);
#if 0 /* test-only */
printf ("a2: write: EMAC_STACR=0x%0x\n", sta_reg); /* test-only */
#endif
sta_reg = in32 (EMAC_STACR);
i = 0;
while ((sta_reg & EMAC_STACR_OC) == 0) {
udelay (7);
if (i > 5) {
#if 0 /* test-only */
printf ("read err 2\n");
#endif
return -1;
}
i++;
sta_reg = in32 (EMAC_STACR);
}
if ((sta_reg & EMAC_STACR_PHYE) != 0) {
#if 0 /* test-only */
printf ("read err 3\n");
printf ("a2: read: EMAC_STACR=0x%0lx, i=%d\n",
sta_reg, (int) i); /* test-only */
#endif
return -1;
}
*value = *(short *) (&sta_reg);
return 0;
} /* phy_read */
/***********************************************************/
/* write a phy reg and return the value with a rc */
/***********************************************************/
int miiphy_write (unsigned char addr, unsigned char reg,
unsigned short value)
{
unsigned long sta_reg; /* STA scratch area */
unsigned long i;
/* see if it is ready for 1000 nsec */
i = 0;
while ((in32 (EMAC_STACR) & EMAC_STACR_OC) == 0) {
if (i > 5)
return -1;
udelay (7);
i++;
}
sta_reg = 0;
sta_reg = reg; /* reg address */
/* set clock (50Mhz) and read flags */
sta_reg = (sta_reg | EMAC_STACR_WRITE) & ~EMAC_STACR_CLK_100MHZ;
#ifdef CONFIG_PHY_CLK_FREQ
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 */
memcpy (&sta_reg, &value, 2); /* put in data */
out32 (EMAC_STACR, sta_reg);
/* wait for completion */
i = 0;
sta_reg = in32 (EMAC_STACR);
while ((sta_reg & EMAC_STACR_OC) == 0) {
udelay (7);
if (i > 5)
return -1;
i++;
sta_reg = in32 (EMAC_STACR);
}
if ((sta_reg & EMAC_STACR_PHYE) != 0)
return -1;
return 0;
} /* phy_read */
#endif /* CONFIG_405GP */
|
