255 lines
9.1 KiB
C
255 lines
9.1 KiB
C
/************************************************************************************
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* configs/stm32f4discovery/src/stm32_ethernet.c
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*
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* Copyright (C) 2015, 2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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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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/* Force verbose debug on in this file only to support unit-level testing. */
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#ifdef CONFIG_NETDEV_PHY_DEBUG
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# undef CONFIG_DEBUG_INFO
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# define CONFIG_DEBUG_INFO 1
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# undef CONFIG_DEBUG_NET
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# define CONFIG_DEBUG_NET 1
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#endif
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/irq.h>
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#include <nuttx/arch.h>
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#include <nuttx/fs/ioctl.h>
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#include <nuttx/mtd/mtd.h>
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#include "stm32_gpio.h"
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#include "stm32_eth.h"
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#include "stm32f4discovery.h"
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#if defined(CONFIG_STM32F4DISBB) && defined(CONFIG_STM32_ETHMAC)
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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#define STM32_ETHMAC_DEVNAME "eth0"
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#define AT24XX_MACADDR_OFFSET 0x9a
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/* Debug ********************************************************************/
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/* Extra, in-depth debug output that is only available if
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* CONFIG_NETDEV_PHY_DEBUG us defined.
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*/
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#ifdef CONFIG_NETDEV_PHY_DEBUG
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# define phyerr _err
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# define phywarn _warn
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# define phyinfo _info
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#else
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# define phyerr(x...)
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# define phywarn(x...)
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# define phyinfo(x...)
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#endif
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/************************************************************************************
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* Private Data
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************************************************************************************/
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#ifdef HAVE_NETMONITOR
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static xcpt_t g_ethmac_handler;
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static void *g_ethmac_arg;
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#endif
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/************************************************************************************
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* Private Functions
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************************************************************************************/
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/************************************************************************************
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* Name: stm32_emac0_phy_enable
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************************************************************************************/
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#ifdef HAVE_NETMONITOR
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static void stm32_emac0_phy_enable(bool enable)
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{
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phyinfo("enable=%d\n", enable);
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if (enable && g_ethmac_handler != NULL)
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{
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/* Attach and enable GPIO interrupt (and event) on the falling edge */
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(void)stm32_gpiosetevent(GPIO_EMAC_NINT, false, true, true,
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g_ethmac_handler, g_ethmac_arg);
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}
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else
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{
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/* Detach and disable GPIO interrupt */
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(void)stm32_gpiosetevent(GPIO_EMAC_NINT, false, false, false,
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NULL, NULL);
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}
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}
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#endif
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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/************************************************************************************
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* Name: stm32_netinitialize
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*
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* Description:
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* Configure board resources to support networking.
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*
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************************************************************************************/
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void weak_function stm32_netinitialize(void)
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{
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#ifdef HAVE_NETMONITOR
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/* Configure the PHY interrupt GPIO */
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phyinfo("Configuring %08x\n", GPIO_EMAC_NINT);
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stm32_configgpio(GPIO_EMAC_NINT);
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#endif
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/* Configure PHY /RESET output */
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stm32_configgpio(GPIO_EMAC_NRST);
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}
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/****************************************************************************
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* Name: arch_phy_irq
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*
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* Description:
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* This function may be called to register an interrupt handler that will
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* be called when a PHY interrupt occurs. This function both attaches
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* the interrupt handler and enables the interrupt if 'handler' is non-
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* NULL. If handler is NULL, then the interrupt is detached and disabled
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* instead.
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*
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* The PHY interrupt is always disabled upon return. The caller must
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* call back through the enable function point to control the state of
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* the interrupt.
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*
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* This interrupt may or may not be available on a given platform depending
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* on how the network hardware architecture is implemented. In a typical
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* case, the PHY interrupt is provided to board-level logic as a GPIO
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* interrupt (in which case this is a board-specific interface and really
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* should be called board_phy_irq()); In other cases, the PHY interrupt
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* may be cause by the chip's MAC logic (in which case arch_phy_irq()) is
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* an appropriate name. Other other boards, there may be no PHY interrupts
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* available at all. If client attachable PHY interrupts are available
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* from the board or from the chip, then CONFIG_ARCH_PHY_INTERRUPT should
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* be defined to indicate that fact.
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*
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* Typical usage:
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* a. OS service logic (not application logic*) attaches to the PHY
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* PHY interrupt and enables the PHY interrupt.
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* b. When the PHY interrupt occurs: (1) the interrupt should be
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* disabled and () work should be scheduled on the worker thread (or
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* perhaps a dedicated application thread).
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* c. That worker thread should use the SIOCGMIIPHY, SIOCGMIIREG,
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* and SIOCSMIIREG ioctl calls** to communicate with the PHY,
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* determine what network event took place (Link Up/Down?), and
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* take the appropriate actions.
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* d. It should then interact the PHY to clear any pending
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* interrupts, then re-enable the PHY interrupt.
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*
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* * This is an OS internal interface and should not be used from
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* application space. Rather applications should use the SIOCMIISIG
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* ioctl to receive a signal when a PHY event occurs.
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* ** This interrupt is really of no use if the Ethernet MAC driver
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* does not support these ioctl calls.
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*
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* Input Parameters:
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* intf - Identifies the network interface. For example "eth0". Only
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* useful on platforms that support multiple Ethernet interfaces
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* and, hence, multiple PHYs and PHY interrupts.
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* handler - The client interrupt handler to be invoked when the PHY
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* asserts an interrupt. Must reside in OS space, but can
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* signal tasks in user space. A value of NULL can be passed
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* in order to detach and disable the PHY interrupt.
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* arg - The argument that will accompany the interrupt
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* enable - A function pointer that be unsed to enable or disable the
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* PHY interrupt.
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*
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* Returned Value:
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* Zero (OK) returned on success; a negated errno value is returned on
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* failure.
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*
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****************************************************************************/
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#ifdef HAVE_NETMONITOR
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int arch_phy_irq(FAR const char *intf, xcpt_t handler, void *arg,
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phy_enable_t *enable)
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{
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phy_enable_t enabler;
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irqstate_t flags;
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ninfo("%s: handler=%p\n", intf, handler);
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phyinfo("ETHMAC: devname=%s\n", STM32_ETHMAC_DEVNAME);
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DEBUGASSERT(intf);
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flags = enter_critical_section();
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if (strcmp(intf, STM32_ETHMAC_DEVNAME) == 0)
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{
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phyinfo("Select ETHMAC\n");
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g_ethmac_handler = handler;
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g_ethmac_arg = arg;
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enabler = stm32_emac0_phy_enable;
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}
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else
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{
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nerr("ERROR: Unsupported interface: %s\n", intf);
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enabler = NULL;
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}
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if (enable)
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{
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*enable = enabler;
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}
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leave_critical_section(flags);
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return OK;
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}
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#endif
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#endif /* CONFIG_STM32F4DISBB && CONFIG_STM32_ETHMAC */
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