/******************************************************************************
* Function Name: _phy_reg_set
* Description : Sets a PHY device to read or write mode
* Arguments : reg_addr - address of the PHY register
* : option - mode
* Return Value : none
******************************************************************************/
void _phy_reg_set( uint16_t reg_addr, int32_t option )
{
int32_t i;
uint16_t data;
data = 0;
data = (PHY_ST << 14); /* ST code */
if( option == PHY_READ )
{
data |= (PHY_READ << 12); /* OP code(RD) */
}
else
{
data |= (PHY_WRITE << 12); /* OP code(WT) */
}
data |= (PHY_ADDR << 7); /* PHY Address */
data |= (reg_addr << 2); /* Reg Address */
i = 14;
while( i > 0 )
{
if( (data & 0x8000) == 0 )
{
_phy_mii_write_0();
}
else
{
_phy_mii_write_1();
}
data <<= 1;
i--;
}
}
/******************************************************************************
* Function Name: _phy_preamble
* Description : As preliminary preparation for access to the PHY module register,
* "1" is output via the MII management interface.
* Arguments : none
* Return Value : none
******************************************************************************/
void _phy_preamble( void )
{
int16_t i;
i = 32;
while( i > 0 )
{
_phy_mii_write_1();
i--;
}
}
/******************************************************************************
* Function Name: _phy_reg_write
* Description : Writes to PHY register through MII interface
* Arguments : data - value to write
* Return Value : none
******************************************************************************/
void _phy_reg_write( uint16_t data )
{
int32_t i;
i = 16;
while( i > 0 )
{
if( (data & 0x8000) == 0 )
{
_phy_mii_write_0();
}
else
{
_phy_mii_write_1();
}
i--;
data <<= 1;
}
}
/******************************************************************************
* Function Name: _phy_reg_write
* Description : Writes to PHY register through MII interface
* Arguments : data - value to write
* Return Value : none
******************************************************************************/
void _phy_reg_write( unsigned short data )
{
long i;
i = 16;
while( i > 0 )
{
if( (data & 0x8000) == 0 )
{
_phy_mii_write_0();
}
else
{
_phy_mii_write_1();
}
i--;
data <<= 1;
}
}
/******************************************************************************
* Function Name: _phy_ta_10
* Description : Switches data bus so MII interface can drive data
* : for write operation
* Arguments : none
* Return Value : none
******************************************************************************/
void _phy_ta_10(void)
{
_phy_mii_write_1();
_phy_mii_write_0();
}