/****************************************************************************
* configs/fire-stm32v2/src/up_enc28j60.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name NuttX 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.
*
****************************************************************************/
/* 2MBit SPI FLASH OR ENC28J60
*
* --- ------ -------------- -----------------------------------------------------
* PIN NAME SIGNAL NOTES
* --- ------ -------------- -----------------------------------------------------
*
* 29 PA4 PA4-SPI1-NSS 10Mbit ENC28J60, SPI 2M FLASH
* 30 PA5 PA5-SPI1-SCK 2.4" TFT + Touchscreen, 10Mbit ENC28J60, SPI 2M FLASH
* 31 PA6 PA6-SPI1-MISO 2.4" TFT + Touchscreen, 10Mbit ENC28J60, SPI 2M FLASH
* 32 PA7 PA7-SPI1-MOSI 2.4" TFT + Touchscreen, 10Mbit ENC28J60, SPI 2M FLASH
*/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdio.h>
#include <debug.h>
#include <nuttx/spi.h>
#include <nuttx/net/enc28j60.h>
#include <arch/board/board.h>
#include "chip.h"
#include "up_arch.h"
#include "up_internal.h"
#include "fire_internal.h"
#ifdef CONFIG_NET_ENC28J60
/****************************************************************************
* Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* ENC28J60
*
* --- ------ -------------- -----------------------------------------------------
* PIN NAME SIGNAL NOTES
* --- ------ -------------- -----------------------------------------------------
*
* 29 PA4 PA4-SPI1-NSS 10Mbit ENC28J60, SPI 2M FLASH
* 30 PA5 PA5-SPI1-SCK 2.4" TFT + Touchscreen, 10Mbit ENC28J60, SPI 2M FLASH
* 31 PA6 PA6-SPI1-MISO 2.4" TFT + Touchscreen, 10Mbit ENC28J60, SPI 2M FLASH
* 32 PA7 PA7-SPI1-MOSI 2.4" TFT + Touchscreen, 10Mbit ENC28J60, SPI 2M FLASH
* 98 PE1 PE1-FSMC_NBL1 2.4" TFT + Touchscreen, 10Mbit EN28J60 Reset
* 4 PE5 (no name) 10Mbps ENC28J60 Interrupt
*/
/* ENC28J60 is on SPI1 */
#ifndef CONFIG_STM32_SPI1
# error "Need CONFIG_STM32_SPI1 in the configuration"
#endif
/* SPI Assumptions **********************************************************/
#define ENC28J60_SPI_PORTNO 1 /* On SPI1 */
#define ENC28J60_DEVNO 0 /* Only one ENC28J60 */
/****************************************************************************
* Private Types
****************************************************************************/
struct stm32_lower_s
{
const struct enc_lower_s lower; /* Low-level MCU interface */
xcpt_t handler; /* ENC28J60 interrupt handler */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int up_attach(FAR struct enc_lower_s *lower, xcpt_t handler);
static void up_enable(FAR struct enc_lower_s *lower);
static void up_disable(FAR struct enc_lower_s *lower);
/****************************************************************************
* Private Data
****************************************************************************/
/* The ENC28J60 normal provides interrupts to the MCU via a GPIO pin. The
* following structure provides an MCU-independent mechanixm for controlling
* the ENC28J60 GPIO interrupt.
*/
static const struct enc_lower_s g_enclower =
{
{
.attach = up_attach,
.enable = up_enable,
.disable = up_disable
}
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: struct enc_lower_s methods
****************************************************************************/
static int up_attach(FAR struct enc_lower_s *lower, xcpt_t handler)
{
FAR struct stm32_lower_s *priv = (FAR struct stm32_lower_s *)lower;
/* Just save the handler for use when the interrupt is enabled */
priv-handler = handler;
return OK;
}
static void up_enable(FAR struct enc_lower_s *lower)
{
FAR struct stm32_lower_s *priv = (FAR struct stm32_lower_s *)lower;
DEBUGASSERT(priv->handler);
(void)stm32_gpiosetevent(GPIO_ENC28J60_INTR, true, true, true, priv-handler);
}
static void up_disable(FAR struct enc_lower_s *lower)
{
(void)stm32_gpiosetevent(GPIO_ENC28J60_INTR, true, true, true, NULL);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_netinitialize
****************************************************************************/
void up_netinitialize(void)
{
FAR struct spi_dev_s *spi;
uint16_t reg16;
int ret;
/* Assumptions:
* 1) ENC28J60 pins were configured in up_spi.c early in the boot-up phase.
* 2) Clocking for the SPI1 peripheral was also provided earlier in boot-up.
*/
spi = up_spiinitialize(ENC28J60_SPI_PORTNO);
if (!spi)
{
nlldbg("Failed to initialize SPI port %d\n", ENC28J60_SPI_PORTNO);
return;
}
/* Take ENC28J60 out of reset (active low)*/
stm32_gpiowrite(GPIO_ENC28J60_RESET, true);
/* Bind the SPI port to the ENC28J60 driver */
ret = enc_initialize(spi, ENC28J60_DEVNO, &g_enclower);
if (ret < 0)
{
nlldbg("Failed to bind SPI port %d ENC28J60 device %d: %d\n",
ENC28J60_SPI_PORTNO, ENC28J60_DEVNO, ret);
return;
}
nllvdbg("Bound SPI port %d to ENC28J60 device %d\n",
ENC28J60_SPI_PORTNO, ENC28J60_DEVNO);
}
#endif /* CONFIG_NET_ENC28J60 */
