53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/stm32/f1/ethernet.h>
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void eth_smi_write(u8 phy, u8 reg, u16 data)
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{
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/* Set PHY and register addresses for write access. */
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ETH_MACMIIAR &= ~(ETH_MACMIIAR_MR | ETH_MACMIIAR_PA);
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ETH_MACMIIAR |= (phy << 11) | (reg << 6) | ETH_MACMIIAR_MW;
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/* Set register value. */
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ETH_MACMIIDR = data;
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/* Begin transaction. */
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ETH_MACMIIAR |= ETH_MACMIIAR_MB;
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/* Wait for not busy. */
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while (ETH_MACMIIAR & ETH_MACMIIAR_MB);
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}
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u16 eth_smi_read(u8 phy, u8 reg)
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{
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/* Set PHY and register addresses for write access. */
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ETH_MACMIIAR &= ~(ETH_MACMIIAR_MR | ETH_MACMIIAR_PA | ETH_MACMIIAR_MW);
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ETH_MACMIIAR |= (phy << 11) | (reg << 6);
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/* Begin transaction. */
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ETH_MACMIIAR |= ETH_MACMIIAR_MB;
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/* Wait for not busy. */
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while (ETH_MACMIIAR & ETH_MACMIIAR_MB);
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/* Set register value. */
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return (u16)(ETH_MACMIIDR);
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}
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