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/************************************************************************************
* configs/sama5d4-ek/src/sam_ethernet.c
*
* Copyright (C) 2014 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.
*
************************************************************************************/
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <string.h>
#include <assert.h>
#include <nuttx/irq.h>
#include <nuttx/arch.h>
#include "sam_pio.h"
#include "sam_ethernet.h"
#ifdef HAVE_NETWORK
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
#ifndef CONFIG_SAMA5_EMAC0
# undef CONFIG_SAMA5_EMAC0_ISETH0
#endif
#ifdef CONFIG_SAMA5_EMAC0_ISETH0
# SAMA5_EMAC0_DEVNAME "eth0"
# SAMA5_EMAC1_DEVNAME "eth1"
#else
# SAMA5_EMAC0_DEVNAME "eth1"
# SAMA5_EMAC1_DEVNAME "eth0"
#endif
/************************************************************************************
* Private Data
************************************************************************************/
#ifdef CONFIG_SAMA5_PIOE_IRQ
#ifdef CONFIG_SAMA5_EMAC0
static xcpt g_emac0_handler;
#endif
#ifdef CONFIG_SAMA5_EMAC1
static xcpt g_emac1_handler;
#endif
#endif
/************************************************************************************
* Private Functions
************************************************************************************/
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: sam_netinitialize
*
* Description:
* Configure board resources to support networking.
*
************************************************************************************/
void weak_function sam_netinitialize(void)
{
#ifdef CONFIG_SAMA4_EMAC0
sam_configpio(PIO_INT_ETH0);
#endif
#ifdef CONFIG_SAMA4_EMAC1
sam_configpio(PIO_INT_ETH1);
#endif
}
/****************************************************************************
* Name: arch_phy_irq
*
* Description:
* This function may be called to register an interrupt handler that will
* be called when a PHY interrupt occurs. This function both attaches
* the interrupt handler and enables the interrupt if 'handler' is non-
* NULL. If handler is NULL, then the interrupt is detached and disabled
* instead.
*
* This interrupt may or may not be available on a given platform depending
* on how the network hardware architecture is implemented. In a typical
* case, the PHY interrupt is provided to board-level logic as a GPIO
* interrupt (in which case this is a board-specific interface and really
* should be called board_phy_irq()); In other cases, the PHY interrupt
* may be cause by the chip's MAC logic (in which case arch_phy_irq()) is
* an appropriate name. Other other boards, there may be no PHY interrupts
* available at all. If client attachable PHY interrupts are available
* from the board or from the chip, then CONFIG_ARCH_PHY_INTERRUPT should
* be defined to indicate that fact.
*
* Typical usage:
* a. OS service logic (not application logic*) attaches to the PHY
* PHY interrupt.
* b. When the PHY interrupt occurs, work should be scheduled on the
* worker thread (or perhaps a dedicated application thread).
* c. That worker thread should use the SIOCGMIIPHY, SIOCGMIIREG,
* and SIOCSMIIREG ioctl calls** to communicate with the PHY,
* determine what network event took place (Link Up/Down?), and
* take the appropriate actions.
*
* * This is an OS internal interface and should not be used from
* application space.
* ** This interrupt is really of no use if the Ethernet MAC driver
* does not support these ioctl calls.
*
* Input Parameters:
* intf - Identifies the network interface. For example "eth0". Only
* useful on platforms that support multiple Ethernet interfaces
* and, hence, multiple PHYs and PHY interrupts.
* handler - The client interrupt handler to be invoked when the PHY
* asserts an interrupt. Must reside in OS space, but can
* signal tasks in user space. A value of NULL can be passed
* in order to detach and disable the PHY interrupt.
*
* Returned Value:
* The previous PHY interrupt handler address is returned. This allows you
* to temporarily replace an interrupt handler, then restore the original
* interrupt handler. NULL is returned if there is was not handler in
* place when the call was made.
*
****************************************************************************/
#ifdef CONFIG_SAMA5_PIOE_IRQ
xcpt_t arch_phy_irq(FAR const char *intf, xcpt_t handler);
{
irqstate_t flags;
xcpt_t *handler;
xcpt_t oldhandler;
pio_pinset_t pinset;
int irq;
DEBUGASSERT(intf);
#ifdef CONFIG_SAMA5_EMAC0
if (strcmp(intf, SAMA5_EMAC0_DEVNAME) == 0)
{
handler = &g_emac0_handler;
pinset = PIO_INT_ETH0;
irq = IRQ_INT_ETH0;
}
else
#endif
#ifdef CONFIG_SAMA5_EMAC1
if (strcmp(intf, SAMA5_EMAC1_DEVNAME) == 0)
{
handler = &g_emac1_handler;
pinset = PIO_INT_ETH1;
irq = IRQ_INT_ETH1;
}
else
#endif
{
ndbg("Unsupported interface: %s\n", intf);
return NULL;
}
/* Disable interrupts until we are done. This guarantees that the
* following operations are atomic.
*/
flags = irqsave();
/* Get the old button interrupt handler and save the new one */
oldhandler = *handler;
*handler = handler;
/* Configure the interrupt */
sam_pioirq(pinset);
(void)irq_attach(irq, handler);
sam_pioirqenable(irq);
/* Return the old button handler (so that it can be restored) */
irqrestore(flags);
return oldhandler;
}
#endif /* CONFIG_SAMA5_PIOE_IRQ */
#endif /* HAVE_NETWORK */
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