TMS570LC4357: Ethernet PHY not accessible.

Hi Ramesh,

Please use MDIO to access the PHY registers. For example:

#define mdioUSERACCESS0 *( volatile uint32_t* )( MDIO_BASE + MDIO_USERACCESS0 )
#define mdioCONTROL *( volatile uint32_t* )( MDIO_BASE + MDIO_CONTROL )


uint16_t phy_getReg( uint16_t phynum, uint16_t regnum )
{
uint16_t value;

mdioUSERACCESS0 = 0 // Read Phy Id 1
| ( 1 << 31 ) // [31] Go
| ( 0 << 30 ) // [30] Read
| ( 0 << 29 ) // [29] Ack
| ( (regnum & 0x1F) << 21 ) // [25-21] PHY register address
| ( (phynum & 0x1F) << 16 ) // [20-16] PHY address
| ( 0 << 0 ); // [15-0] Data

while( mdioUSERACCESS0 & 0x80000000 ); // Wait for Results

value = mdioUSERACCESS0;
return value;
}

/* ------------------------------------------------------------------------ *
* phy_setReg( phynum, regnum, data ) *
* ------------------------------------------------------------------------ */
void phy_setReg( uint16_t phynum, uint16_t regnum, uint16_t data )
{
mdioUSERACCESS0 = 0 // Read Phy Id 1
| ( 1 << 31 ) // [31] Go
| ( 1 << 30 ) // [30] Write
| ( 0 << 29 ) // [29] Ack
| ( (regnum & 0x1F) << 21 ) // [25-21] PHY register address
| ( (phynum & 0x1F) << 16 ) // [20-16] PHY address
| ( (data & 0xFFFF) << 0 ); // [15-0] Data

while( mdioUSERACCESS0 & 0x80000000 ); // Wait for Results
}