/**************************************************************************** * boards/arm/at32/at32f437-mini/src/at32_ethernet.c * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include /* Force verbose debug on in this file only to support unit-level testing. */ #ifdef CONFIG_NETDEV_PHY_DEBUG # undef CONFIG_DEBUG_INFO # define CONFIG_DEBUG_INFO 1 # undef CONFIG_DEBUG_NET # define CONFIG_DEBUG_NET 1 #endif #include #include #include #include #include #include #include #include #include "at32_gpio.h" #include "at32_eth.h" #include "at32f437-mini.h" #if defined(CONFIG_AT32_ETHMAC) /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ #define AT32_ETHMAC_DEVNAME "eth0" #undef HAVE_NETMONITOR /* Debug ********************************************************************/ /* Extra, in-depth debug output that is only available if * CONFIG_NETDEV_PHY_DEBUG us defined. */ #ifdef CONFIG_NETDEV_PHY_DEBUG # define phyerr _err # define phywarn _warn # define phyinfo _info #else # define phyerr(x...) # define phywarn(x...) # define phyinfo(x...) #endif /**************************************************************************** * Private Data ****************************************************************************/ #ifdef HAVE_NETMONITOR static xcpt_t g_ethmac_handler; static void *g_ethmac_arg; #endif /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: at32_emac0_phy_enable ****************************************************************************/ #ifdef HAVE_NETMONITOR static void at32_emac0_phy_enable(bool enable) { phyinfo("enable=%d\n", enable); if (enable && g_ethmac_handler != NULL) { /* Attach and enable GPIO interrupt (and event) on the falling edge */ at32_gpiosetevent(GPIO_EMAC_NINT, false, true, true, g_ethmac_handler, g_ethmac_arg); } else { /* Detach and disable GPIO interrupt */ at32_gpiosetevent(GPIO_EMAC_NINT, false, false, false, NULL, NULL); } } #endif /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: at32_netinitialize * * Description: * Configure board resources to support networking. * ****************************************************************************/ void at32_netinitialize(void) { #ifdef HAVE_NETMONITOR /* Configure the PHY interrupt GPIO */ phyinfo("Configuring %08x\n", GPIO_EMAC_NINT); at32_configgpio(GPIO_EMAC_NINT); #endif /* Configure PHY /RESET output */ at32_configgpio(GPIO_EMAC_NRST); } /**************************************************************************** * 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. * * The PHY interrupt is always disabled upon return. The caller must * call back through the enable function point to control the state of * the interrupt. * * 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 and enables the PHY interrupt. * b. When the PHY interrupt occurs: (1) the interrupt should be * disabled and () 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. * d. It should then interact the PHY to clear any pending * interrupts, then re-enable the PHY interrupt. * * * This is an OS internal interface and should not be used from * application space. Rather applications should use the SIOCMIISIG * ioctl to receive a signal when a PHY event occurs. * ** 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. * arg - The argument that will accompany the interrupt * enable - A function pointer that be unused to enable or disable the * PHY interrupt. * * Returned Value: * Zero (OK) returned on success; a negated errno value is returned on * failure. * ****************************************************************************/ #ifdef HAVE_NETMONITOR int arch_phy_irq(const char *intf, xcpt_t handler, void *arg, phy_enable_t *enable) { phy_enable_t enabler; irqstate_t flags; ninfo("%s: handler=%p\n", intf, handler); phyinfo("ETHMAC: devname=%s\n", AT32_ETHMAC_DEVNAME); DEBUGASSERT(intf); flags = enter_critical_section(); if (strcmp(intf, AT32_ETHMAC_DEVNAME) == 0) { phyinfo("Select ETHMAC\n"); g_ethmac_handler = handler; g_ethmac_arg = arg; enabler = at32_emac0_phy_enable; } else { nerr("ERROR: Unsupported interface: %s\n", intf); enabler = NULL; } if (enable) { *enable = enabler; } leave_critical_section(flags); return OK; } #endif #endif /* CONFIG_AT32_ETHMAC */