diff options
Diffstat (limited to 'lwip/ports/drivers/ti_drv_mdio.h')
| -rw-r--r-- | lwip/ports/drivers/ti_drv_mdio.h | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/lwip/ports/drivers/ti_drv_mdio.h b/lwip/ports/drivers/ti_drv_mdio.h new file mode 100644 index 0000000..e115231 --- /dev/null +++ b/lwip/ports/drivers/ti_drv_mdio.h @@ -0,0 +1,165 @@ +/* +* 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__ */ |