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-rw-r--r--os/hal/platforms/STM32/mac_lld.c260
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diff --git a/os/hal/platforms/STM32/mac_lld.c b/os/hal/platforms/STM32/mac_lld.c
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+++ b/os/hal/platforms/STM32/mac_lld.c
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+/*
+ ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
+ 2011 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file STM32/mac_lld.c
+ * @brief STM32 low level MAC driver code.
+ *
+ * @addtogroup MAC
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+#include "mii.h"
+#
+#if HAL_USE_MAC || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+#define BUFFER_SLICE ((((MAC_BUFFERS_SIZE - 1) | 3) + 1) / 4)
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/**
+ * @brief Ethernet driver 1.
+ */
+MACDriver ETH1;
+
+/*===========================================================================*/
+/* Driver local variables. */
+/*===========================================================================*/
+
+static stm32_eth_rx_descriptor_t *rxptr;
+static stm32_eth_tx_descriptor_t *txptr;
+
+static stm32_eth_rx_descriptor_t rd[MAC_RECEIVE_BUFFERS];
+static stm32_eth_tx_descriptor_t td[MAC_TRANSMIT_BUFFERS];
+
+static uint32_t rb[MAC_RECEIVE_BUFFERS * BUFFER_SLICE];
+static uint32_t tb[MAC_TRANSMIT_BUFFERS * BUFFER_SLICE];
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level MAC initialization.
+ *
+ * @notapi
+ */
+void mac_lld_init(void) {
+ unsigned i;
+
+ macObjectInit(&ETH1);
+
+ /* Descriptor tables are initialized in linked mode, note that the first
+ word is not initialized here but in mac_lld_start().*/
+ for (i = 0; i < MAC_RECEIVE_BUFFERS; i++) {
+ rd[i].rdes1 = RDES1_RCH | MAC_BUFFERS_SIZE;
+ rd[i].rdes2 = (uint32_t)&rb[i * BUFFER_SLICE];
+ rd[i].rdes3 = (uint32_t)&rb[((i + 1) % MAC_RECEIVE_BUFFERS) *
+ BUFFER_SLICE];
+ }
+ for (i = 0; i < MAC_TRANSMIT_BUFFERS; i++) {
+ td[i].tdes1 = 0;
+ td[i].tdes2 = (uint32_t)&tb[i * BUFFER_SLICE];
+ td[i].tdes3 = (uint32_t)&tb[((i + 1) % MAC_TRANSMIT_BUFFERS) *
+ BUFFER_SLICE];
+ }
+}
+
+/**
+ * @brief Configures and activates the MAC peripheral.
+ *
+ * @param[in] macp pointer to the @p MACDriver object
+ *
+ * @notapi
+ */
+void mac_lld_start(MACDriver *macp) {
+ unsigned i;
+
+ /* Resets the state of all descriptors.*/
+ for (i = 0; i < MAC_RECEIVE_BUFFERS; i++)
+ rd[i].rdes0 = RDES0_OWN;
+ rxptr = (stm32_eth_rx_descriptor_t *)rd;
+ for (i = 0; i < MAC_TRANSMIT_BUFFERS; i++)
+ td[i].tdes0 = TDES0_TCH;
+ txptr = (stm32_eth_tx_descriptor_t *)td;
+
+ /* Soft reset of the MAC core and wait until the reset is complete.*/
+ ETH->DMABMR |= ETH_DMABMR_SR;
+ while (ETH->DMABMR & ETH_DMABMR_SR)
+ ;
+
+ /* Descriptor chains pointers.*/
+ ETH->DMARDLAR = (uint32_t)rd;
+ ETH->DMATDLAR = (uint32_t)rd;
+
+ /* Clear DMA status.*/
+}
+
+/**
+ * @brief Deactivates the MAC peripheral.
+ *
+ * @param[in] macp pointer to the @p MACDriver object
+ *
+ * @notapi
+ */
+void mac_lld_stop(MACDriver *macp) {
+
+}
+
+/**
+ * @brief Returns a transmission descriptor.
+ * @details One of the available transmission descriptors is locked and
+ * returned.
+ *
+ * @param[in] macp pointer to the @p MACDriver object
+ * @param[out] tdp pointer to a @p MACTransmitDescriptor structure
+ * @return The operation status.
+ * @retval RDY_OK the descriptor has been obtained.
+ * @retval RDY_TIMEOUT descriptor not available.
+ *
+ * @notapi
+ */
+msg_t max_lld_get_transmit_descriptor(MACDriver *macp,
+ MACTransmitDescriptor *tdp) {
+
+ return RDY_OK;
+}
+
+/**
+ * @brief Writes to a transmit descriptor's stream.
+ *
+ * @param[in] tdp pointer to a @p MACTransmitDescriptor structure
+ * @param[in] buf pointer to the buffer cointaining the data to be
+ * written
+ * @param[in] size number of bytes to be written
+ * @return The number of bytes written into the descriptor's
+ * stream, this value can be less than the amount
+ * specified in the parameter @p size if the maximum
+ * frame size is reached.
+ *
+ * @notapi
+ */
+size_t mac_lld_write_transmit_descriptor(MACTransmitDescriptor *tdp,
+ uint8_t *buf,
+ size_t size) {
+
+ return 0;
+}
+
+/**
+ * @brief Releases a transmit descriptor and starts the transmission of the
+ * enqueued data as a single frame.
+ *
+ * @param[in] tdp the pointer to the @p MACTransmitDescriptor structure
+ *
+ * @notapi
+ */
+void mac_lld_release_transmit_descriptor(MACTransmitDescriptor *tdp) {
+
+}
+
+/**
+ * @brief Returns a receive descriptor.
+ *
+ * @param[in] macp pointer to the @p MACDriver object
+ * @param[out] rdp pointer to a @p MACReceiveDescriptor structure
+ * @return The operation status.
+ * @retval RDY_OK the descriptor has been obtained.
+ * @retval RDY_TIMEOUT descriptor not available.
+ *
+ * @notapi
+ */
+msg_t max_lld_get_receive_descriptor(MACDriver *macp,
+ MACReceiveDescriptor *rdp) {
+
+ return RDY_TIMEOUT;
+}
+
+/**
+ * @brief Reads from a receive descriptor's stream.
+ *
+ * @param[in] rdp pointer to a @p MACReceiveDescriptor structure
+ * @param[in] buf pointer to the buffer that will receive the read data
+ * @param[in] size number of bytes to be read
+ * @return The number of bytes read from the descriptor's
+ * stream, this value can be less than the amount
+ * specified in the parameter @p size if there are
+ * no more bytes to read.
+ *
+ * @notapi
+ */
+size_t mac_lld_read_receive_descriptor(MACReceiveDescriptor *rdp,
+ uint8_t *buf,
+ size_t size) {
+
+ return 0;
+}
+
+/**
+ * @brief Releases a receive descriptor.
+ * @details The descriptor and its buffer are made available for more incoming
+ * frames.
+ *
+ * @param[in] rdp the pointer to the @p MACReceiveDescriptor structure
+ *
+ * @notapi
+ */
+void mac_lld_release_receive_descriptor(MACReceiveDescriptor *rdp) {
+
+}
+
+/**
+ * @brief Updates and returns the link status.
+ *
+ * @param[in] macp pointer to the @p MACDriver object
+ * @return The link status.
+ * @retval TRUE if the link is active.
+ * @retval FALSE if the link is down.
+ *
+ * @notapi
+ */
+bool_t mac_lld_poll_link_status(MACDriver *macp) {
+
+}
+
+#endif /* HAL_USE_MAC */
+
+/** @} */
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