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/*
* Copyright (C) 2009-2015 Texas Instruments Incorporated - www.ti.com
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef __MDIO_H__
#define __MDIO_H__
#include <bsp/tms570.h>
#include <stdbool.h>
#ifdef __cplusplus
extern "C" {
#endif
/*****************************************************************************/
/**
* \brief Reads a PHY register using MDIO.
*
* \param baseAddr Base Address of the MDIO Module Registers.
* \param phyAddr PHY Adress.
* \param regNum Register Number to be read.
* \param dataPtr Pointer where the read value shall be written.
*
* \return status of the read \n
* TRUE - read is successful.\n
* FALSE - read is not acknowledged properly.
*
**/
static inline uint32_t
MDIOPhyRegRead(volatile tms570_mdio_t *baseAddr, uint32_t phyAddr,
uint32_t regNum, volatile unsigned short *dataPtr)
{
/* Wait till transaction completion if any */
while (baseAddr->USERACCESS0 & TMS570_MDIO_USERACCESS0_GO);
baseAddr->USERACCESS0
= (TMS570_MDIO_USERACCESS0_GO
|TMS570_MDIO_USERACCESS0_REGADR(regNum)
|TMS570_MDIO_USERACCESS0_PHYADR(phyAddr));
/* wait for command completion */
while (baseAddr->USERACCESS0 & TMS570_MDIO_USERACCESS0_GO);
/* Store the data if the read is acknowledged */
if (baseAddr->USERACCESS0 & TMS570_MDIO_USERACCESS0_ACK) {
*dataPtr = (unsigned short)TMS570_MDIO_USERACCESS0_DATA_GET(baseAddr->USERACCESS0);
return true;
}
return false;
}
/**
* \brief Writes a PHY register using MDIO.
*
* \param baseAddr Base Address of the MDIO Module Registers.
* \param phyAddr PHY Adress.
* \param regNum Register Number to be read.
* \param RegVal Value to be written.
*
* \return None
*
**/
static inline void
MDIOPhyRegWrite(volatile tms570_mdio_t *baseAddr, uint32_t phyAddr,
uint32_t regNum, unsigned short RegVal)
{
/* Wait till transaction completion if any */
while (baseAddr->USERACCESS0 & TMS570_MDIO_USERACCESS0_GO);
baseAddr->USERACCESS0 =
(TMS570_MDIO_USERACCESS0_WRITE
| TMS570_MDIO_USERACCESS0_GO
|TMS570_MDIO_USERACCESS0_REGADR(regNum)
|TMS570_MDIO_USERACCESS0_PHYADR(phyAddr)
| RegVal);
/* wait for command completion*/
while (baseAddr->USERACCESS0 & TMS570_MDIO_USERACCESS0_GO);
}
/**
* \brief Reads the alive status of all PHY connected to this MDIO.
* The bit correponding to the PHY address will be set if the PHY
* is alive.
*
* \param baseAddr Base Address of the MDIO Module Registers.
*
* \return MDIO alive register state
*
**/
static inline uint32_t
MDIOPhyAliveStatusGet(volatile tms570_mdio_t *baseAddr)
{
return (baseAddr->ALIVE);
}
/**
* \brief Reads the link status of all PHY connected to this MDIO.
* The bit correponding to the PHY address will be set if the PHY
* link is active.
*
* \param baseAddr Base Address of the MDIO Module Registers.
*
* \return MDIO link register state
*
**/
static inline uint32_t
MDIOPhyLinkStatusGet(volatile tms570_mdio_t *baseAddr)
{
return (baseAddr->LINK);
}
/**
* \brief Initializes the MDIO peripheral. This enables the MDIO state
* machine, uses standard pre-amble and set the clock divider value.
*
* \param baseAddr Base Address of the MDIO Module Registers.
* \param mdioInputFreq The clock input to the MDIO module
* \param mdioOutputFreq The clock output required on the MDIO bus
* \return None
*
**/
static inline void
MDIOInit(volatile tms570_mdio_t *baseAddr, uint32_t mdioInputFreq,
uint32_t mdioOutputFreq)
{
baseAddr->CONTROL = TMS570_MDIO_CONTROL_HIGHEST_USER_CHANNEL(1) |
TMS570_MDIO_CONTROL_ENABLE |
TMS570_MDIO_CONTROL_CLKDIV(0x60);
}
#ifdef __cplusplus
}
#endif
#endif /* __MDIO_H__ */
|
