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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/stm32/f1/ethernet.h>
void eth_smi_write(uint8_t phy, uint8_t reg, uint16_t data)
{
/* Set PHY and register addresses for write access. */
ETH_MACMIIAR &= ~(ETH_MACMIIAR_MR | ETH_MACMIIAR_PA);
ETH_MACMIIAR |= (phy << 11) | (reg << 6) | ETH_MACMIIAR_MW;
/* Set register value. */
ETH_MACMIIDR = data;
/* Begin transaction. */
ETH_MACMIIAR |= ETH_MACMIIAR_MB;
/* Wait for not busy. */
while (ETH_MACMIIAR & ETH_MACMIIAR_MB);
}
uint16_t eth_smi_read(uint8_t phy, uint8_t reg)
{
/* Set PHY and register addresses for write access. */
ETH_MACMIIAR &= ~(ETH_MACMIIAR_MR | ETH_MACMIIAR_PA | ETH_MACMIIAR_MW);
ETH_MACMIIAR |= (phy << 11) | (reg << 6);
/* Begin transaction. */
ETH_MACMIIAR |= ETH_MACMIIAR_MB;
/* Wait for not busy. */
while (ETH_MACMIIAR & ETH_MACMIIAR_MB);
/* Set register value. */
return (uint16_t)(ETH_MACMIIDR);
}
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