wgzAIIT
228 lines
7.4 KiB
C
228 lines
7.4 KiB
C
/****************************************************************************
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* boards/arm/stm32/aiit-arm32-board/src/stm32_enc28j60.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/**
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* @file stm32_enc28j60.c
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* @brief nuttx source code
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* https://github.com/apache/incubator-nuttx.git
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* @version 10.2.0
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* @author AIIT XUOS Lab
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* @date 2022-03-17
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*/
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/* 2MBit SPI FLASH OR ENC28J60
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*
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* -- ---- ------------ -----------------------------------------------------
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* PIN NAME SIGNAL NOTES
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* -- ---- ------------ -----------------------------------------------------
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*
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* 29 PA4 PA4-SPI1-NSS 10Mbit ENC28J60, SPI 2M FLASH
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* 30 PA5 PA5-SPI1-SCK 2.4" TFT + Touchscreen, 10Mbit ENC28J60, SPI 2M FLASH
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* 31 PA6 PA6-SPI1-MISO 2.4" TFT + Touchscreen, 10Mbit ENC28J60, SPI 2M FLASH
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* 32 PA7 PA7-SPI1-MOSI 2.4" TFT + Touchscreen, 10Mbit ENC28J60, SPI 2M FLASH
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*/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <assert.h>
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#include <debug.h>
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#include <nuttx/spi/spi.h>
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#include <nuttx/net/enc28j60.h>
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#include <arch/board/board.h>
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#include "chip.h"
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#include "arm_arch.h"
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#include "arm_internal.h"
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#include "stm32_spi.h"
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#include "aiit-arm32-board.h"
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#ifdef CONFIG_ENC28J60
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* ENC28J60
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*
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* --- ------ -------------- ------------------------------------------------
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* PIN NAME SIGNAL NOTES
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* --- ------ -------------- ------------------------------------------------
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*
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* 29 PA4 PA4-SPI1-NSS 10Mbit ENC28J60, SPI 2M FLASH
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* 30 PA5 PA5-SPI1-SCK 2.4" TFT + Touchscreen,
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* 10Mbit ENC28J60, SPI 2M FLASH
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* 31 PA6 PA6-SPI1-MISO 2.4" TFT + Touchscreen,
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* 10Mbit ENC28J60, SPI 2M FLASH
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* 32 PA7 PA7-SPI1-MOSI 2.4" TFT + Touchscreen,
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* 10Mbit ENC28J60, SPI 2M FLASH
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* 98 PE1 PE1-FSMC_NBL1 2.4" TFT + Touchscreen,
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* 10Mbit EN28J60 Reset
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* 4 PE5 (no name) 10Mbps ENC28J60 Interrupt
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*/
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/* ENC28J60 is on SPI1 */
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#ifndef CONFIG_STM32_SPI1
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# error "Need CONFIG_STM32_SPI1 in the configuration"
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#endif
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/* SPI Assumptions **********************************************************/
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#define ENC28J60_SPI_PORTNO 1 /* On SPI1 */
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#define ENC28J60_DEVNO 0 /* Only one ENC28J60 */
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct stm32_lower_s
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{
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const struct enc_lower_s lower; /* Low-level MCU interface */
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xcpt_t handler; /* ENC28J60 interrupt handler */
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FAR void *arg; /* Argument that accompanies the interrupt */
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static int up_attach(FAR const struct enc_lower_s *lower, xcpt_t handler,
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FAR void *arg);
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static void up_enable(FAR const struct enc_lower_s *lower);
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static void up_disable(FAR const struct enc_lower_s *lower);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* The ENC28J60 normal provides interrupts to the MCU via a GPIO pin. The
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* following structure provides an MCU-independent mechanixm for controlling
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* the ENC28J60 GPIO interrupt.
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*/
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static struct stm32_lower_s g_enclower =
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{
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.lower =
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{
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.attach = up_attach,
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.enable = up_enable,
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.disable = up_disable
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},
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.handler = NULL,
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.arg = NULL
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: struct enc_lower_s methods
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****************************************************************************/
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static int up_attach(FAR const struct enc_lower_s *lower, xcpt_t handler,
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FAR void *arg)
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{
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FAR struct stm32_lower_s *priv = (FAR struct stm32_lower_s *)lower;
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/* Just save the handler for use when the interrupt is enabled */
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priv->handler = handler;
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priv->arg = arg;
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return OK;
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}
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static void up_enable(FAR const struct enc_lower_s *lower)
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{
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FAR struct stm32_lower_s *priv = (FAR struct stm32_lower_s *)lower;
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DEBUGASSERT(priv->handler);
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stm32_gpiosetevent(GPIO_ENC28J60_INTR, false, true, true,
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priv->handler, priv->arg);
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}
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/* REVISIT: Since the interrupt is completely torn down, not just disabled,
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* in interrupt requests that occurs while the interrupt is disabled will be
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* lost.
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*/
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static void up_disable(FAR const struct enc_lower_s *lower)
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{
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stm32_gpiosetevent(GPIO_ENC28J60_INTR, false, true, true,
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NULL, NULL);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: arm_netinitialize
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****************************************************************************/
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void arm_netinitialize(void)
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{
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FAR struct spi_dev_s *spi;
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int ret;
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/* Assumptions:
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* 1) ENC28J60 pins were configured in up_spi.c early in the boot-up phase.
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* 2) Clocking for the SPI1 peripheral was also provided earlier in
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* boot-up.
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*/
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spi = stm32_spibus_initialize(ENC28J60_SPI_PORTNO);
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if (!spi)
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{
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nerr("ERROR: Failed to initialize SPI port %d\n", ENC28J60_SPI_PORTNO);
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return;
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}
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/* Take ENC28J60 out of reset (active low) */
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stm32_gpiowrite(GPIO_ENC28J60_RESET, true);
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/* Bind the SPI port to the ENC28J60 driver */
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ret = enc_initialize(spi, &g_enclower.lower, ENC28J60_DEVNO);
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if (ret < 0)
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{
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nerr("ERROR: Failed to bind SPI port %d ENC28J60 device %d: %d\n",
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ENC28J60_SPI_PORTNO, ENC28J60_DEVNO, ret);
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return;
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}
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ninfo("Bound SPI port %d to ENC28J60 device %d\n",
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ENC28J60_SPI_PORTNO, ENC28J60_DEVNO);
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}
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#endif /* CONFIG_ENC28J60 */
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