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