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#include <common.h>
#include <mii_phy.h>
#include "ep8260.h"
#define MII_MDIO 0x01
#define MII_MDCK 0x02
#define MII_MDIR 0x04
void
mii_discover_phy(void)
{
int known;
unsigned short phy_reg;
unsigned long phy_id;
known = 0;
printf("Discovering phy @ 0: ");
phy_id = mii_phy_read(2) << 16;
phy_id |= mii_phy_read(3);
if ((phy_id & 0xFFFFFC00) == 0x00137800) {
printf("Level One ");
if ((phy_id & 0x000003F0) == 0xE0) {
printf("LXT971A Revision %d\n", (int)(phy_id & 0xF));
known = 1;
}
else printf("unknown type\n");
}
else printf("unknown OUI = 0x%08lX\n", phy_id);
phy_reg = mii_phy_read(1);
if (!(phy_reg & 0x0004)) printf("Link is down\n");
if (!(phy_reg & 0x0020)) printf("Auto-negotiation not complete\n");
if (phy_reg & 0x0002) printf("Jabber condition detected\n");
if (phy_reg & 0x0010) printf("Remote fault condition detected \n");
if (known) {
phy_reg = mii_phy_read(17);
if (phy_reg & 0x0400)
printf("Phy operating at %d MBit/s in %s-duplex mode\n",
phy_reg & 0x4000 ? 100 : 10,
phy_reg & 0x0200 ? "full" : "half");
else
printf("bad link!!\n");
/*
left off: no link, green 100MBit, yellow 10MBit
right off: no activity, green full-duplex, yellow half-duplex
*/
mii_phy_write(20, 0x0452);
}
}
unsigned short
mii_phy_read(unsigned short reg)
{
int i;
unsigned short tmp, val = 0, adr = 0;
t_ep_regs *regs = (t_ep_regs*)CONFIG_SYS_REGS_BASE;
tmp = 0x6002 | (adr << 7) | (reg << 2);
regs->bcsr4 = 0xC3;
for (i = 0; i < 64; i++) {
regs->bcsr4 ^= MII_MDCK;
}
for (i = 0; i < 16; i++) {
regs->bcsr4 &= ~MII_MDCK;
if (tmp & 0x8000) regs->bcsr4 |= MII_MDIO;
else regs->bcsr4 &= ~MII_MDIO;
regs->bcsr4 |= MII_MDCK;
tmp <<= 1;
}
regs->bcsr4 |= MII_MDIR;
for (i = 0; i < 16; i++) {
val <<= 1;
regs->bcsr4 = MII_MDIO | (regs->bcsr4 | MII_MDCK);
if (regs->bcsr4 & MII_MDIO) val |= 1;
regs->bcsr4 = MII_MDIO | (regs->bcsr4 &= ~MII_MDCK);
}
return val;
}
void
mii_phy_write(unsigned short reg, unsigned short val)
{
int i;
unsigned short tmp, adr = 0;
t_ep_regs *regs = (t_ep_regs*)CONFIG_SYS_REGS_BASE;
tmp = 0x5002 | (adr << 7) | (reg << 2);
regs->bcsr4 = 0xC3;
for (i = 0; i < 64; i++) {
regs->bcsr4 ^= MII_MDCK;
}
for (i = 0; i < 16; i++) {
regs->bcsr4 &= ~MII_MDCK;
if (tmp & 0x8000) regs->bcsr4 |= MII_MDIO;
else regs->bcsr4 &= ~MII_MDIO;
regs->bcsr4 |= MII_MDCK;
tmp <<= 1;
}
for (i = 0; i < 16; i++) {
regs->bcsr4 &= ~MII_MDCK;
if (val & 0x8000) regs->bcsr4 |= MII_MDIO;
else regs->bcsr4 &= ~MII_MDIO;
regs->bcsr4 |= MII_MDCK;
val <<= 1;
}
}
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