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/*
ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file AT91SAM7/at91sam7_mii.c
* @brief AT91SAM7 low level MII driver code.
*
* @addtogroup AT91SAM7_MII
* @{
*/
#include "ch.h"
#include "hal.h"
#include "at91sam7_mii.h"
#if HAL_USE_MAC || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level MII driver initialization.
*
* @notapi
*/
void miiInit(void) {
}
/**
* @brief Resets a PHY device.
*
* @param[in] macp pointer to the @p MACDriver object
*
* @notapi
*/
void miiReset(MACDriver *macp) {
(void)macp;
/*
* Disables the pullups on all the pins that are latched on reset by the PHY.
*/
AT91C_BASE_PIOB->PIO_PPUDR = PHY_LATCHED_PINS;
#ifdef PIOB_PHY_PD_MASK
/*
* PHY power control.
*/
AT91C_BASE_PIOB->PIO_OER = PIOB_PHY_PD_MASK; /* Becomes an output. */
AT91C_BASE_PIOB->PIO_PPUDR = PIOB_PHY_PD_MASK;/* Default pullup disabled. */
#if (PHY_HARDWARE == PHY_DAVICOM_9161)
AT91C_BASE_PIOB->PIO_CODR = PIOB_PHY_PD_MASK; /* Output to low level. */
#else
AT91C_BASE_PIOB->PIO_SODR = PIOB_PHY_PD_MASK; /* Output to high level. */
#endif
#endif
/*
* PHY reset by pulsing the NRST pin.
*/
AT91C_BASE_RSTC->RSTC_RMR = 0xA5000100;
AT91C_BASE_RSTC->RSTC_RCR = 0xA5000000 | AT91C_RSTC_EXTRST;
while (!(AT91C_BASE_RSTC->RSTC_RSR & AT91C_RSTC_NRSTL))
;
}
/**
* @brief Reads a PHY register through the MII interface.
*
* @param[in] macp pointer to the @p MACDriver object
* @param[in] addr the register address
* @return The register value.
*
* @notapi
*/
phyreg_t miiGet(MACDriver *macp, phyaddr_t addr) {
(void)macp;
AT91C_BASE_EMAC->EMAC_MAN = (0b01 << 30) | /* SOF */
(0b10 << 28) | /* RW */
(PHY_ADDRESS << 23) | /* PHYA */
(addr << 18) | /* REGA */
(0b10 << 16); /* CODE */
while (!( AT91C_BASE_EMAC->EMAC_NSR & AT91C_EMAC_IDLE))
;
return (phyreg_t)(AT91C_BASE_EMAC->EMAC_MAN & 0xFFFF);
}
/**
* @brief Writes a PHY register through the MII interface.
*
* @param[in] macp pointer to the @p MACDriver object
* @param[in] addr the register address
* @param[in] value the new register value
*
* @notapi
*/
void miiPut(MACDriver *macp, phyaddr_t addr, phyreg_t value) {
(void)macp;
AT91C_BASE_EMAC->EMAC_MAN = (0b01 << 30) | /* SOF */
(0b01 << 28) | /* RW */
(PHY_ADDRESS << 23) | /* PHYA */
(addr << 18) | /* REGA */
(0b10 << 16) | /* CODE */
value;
while (!( AT91C_BASE_EMAC->EMAC_NSR & AT91C_EMAC_IDLE))
;
}
#endif /* HAL_USE_MAC */
/** @} */
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