/**************************************************************************** * drivers/net/skeleton.c * * Copyright (C) 2015 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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 #if defined(CONFIG_NET) && defined(CONFIG_NET_skeleton) #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_NET_NOINTS # include #endif #ifdef CONFIG_NET_PKT # include #endif /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* If processing is not done at the interrupt level, then high priority * work queue support is required. */ #if defined(CONFIG_NET_NOINTS) && !defined(CONFIG_SCHED_HPWORK) # error High priority work queue support is required #endif /* CONFIG_skeleton_NINTERFACES determines the number of physical interfaces * that will be supported. */ #ifndef CONFIG_skeleton_NINTERFACES # define CONFIG_skeleton_NINTERFACES 1 #endif /* TX poll delay = 1 seconds. CLK_TCK is the number of clock ticks per second */ #define skeleton_WDDELAY (1*CLK_TCK) #define skeleton_POLLHSEC (1*2) /* TX timeout = 1 minute */ #define skeleton_TXTIMEOUT (60*CLK_TCK) /* This is a helper pointer for accessing the contents of the Ethernet header */ #define BUF ((struct eth_hdr_s *)priv->sk_dev.d_buf) /**************************************************************************** * Private Types ****************************************************************************/ /* The skel_driver_s encapsulates all state information for a single hardware * interface */ struct skel_driver_s { bool sk_bifup; /* true:ifup false:ifdown */ WDOG_ID sk_txpoll; /* TX poll timer */ WDOG_ID sk_txtimeout; /* TX timeout timer */ #ifdef CONFIG_NET_NOINTS struct work_s sk_work; /* For deferring work to the work queue */ #endif /* This holds the information visible to uIP/NuttX */ struct net_driver_s sk_dev; /* Interface understood by uIP */ }; /**************************************************************************** * Private Data ****************************************************************************/ static struct skel_driver_s g_skel[CONFIG_skeleton_NINTERFACES]; /**************************************************************************** * Private Function Prototypes ****************************************************************************/ /* Common TX logic */ static int skel_transmit(FAR struct skel_driver_s *priv); static int skel_txpoll(struct net_driver_s *dev); /* Interrupt handling */ static void skel_receive(FAR struct skel_driver_s *priv); static void skel_txdone(FAR struct skel_driver_s *priv); static inline void skel_interrupt_process(FAR struct skel_driver_s *priv); #ifdef CONFIG_NET_NOINTS static void skel_interrupt_work(FAR void *arg); #endif static int skel_interrupt(int irq, FAR void *context); /* Watchdog timer expirations */ static inline void skel_txtimeout_process(FAR struct skel_driver_s *priv); #ifdef CONFIG_NET_NOINTS static void skel_txtimeout_work(FAR void *arg); #endif static void skel_txtimeout_expiry(int argc, uint32_t arg, ...); static inline void skel_poll_process(FAR struct skel_driver_s *priv); #ifdef CONFIG_NET_NOINTS static void skel_poll_work(FAR void *arg); #endif static void skel_poll_expiry(int argc, uint32_t arg, ...); /* NuttX callback functions */ static int skel_ifup(FAR struct net_driver_s *dev); static int skel_ifdown(FAR struct net_driver_s *dev); static inline void skel_txavail_process(FAR struct skel_driver_s *priv); #ifdef CONFIG_NET_NOINTS static void skel_txavail_work(FAR void *arg); #endif static int skel_txavail(FAR struct net_driver_s *dev); #if defined(CONFIG_NET_IGMP) || defined(CONFIG_NET_ICMPv6) static int skel_addmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac); #ifdef CONFIG_NET_IGMP static int skel_rmmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac); #endif #ifdef CONFIG_NET_ICMPv6 static void skel_ipv6multicast(FAR struct skel_driver_s *priv); #endif /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Function: skel_transmit * * Description: * Start hardware transmission. Called either from the txdone interrupt * handling or from watchdog based polling. * * Parameters: * priv - Reference to the driver state structure * * Returned Value: * OK on success; a negated errno on failure * * Assumptions: * May or may not be called from an interrupt handler. In either case, * global interrupts are disabled, either explicitly or indirectly through * interrupt handling logic. * ****************************************************************************/ static int skel_transmit(FAR struct skel_driver_s *priv) { /* Verify that the hardware is ready to send another packet. If we get * here, then we are committed to sending a packet; Higher level logic * must have assured that there is no transmission in progress. */ /* Increment statistics */ /* Send the packet: address=priv->sk_dev.d_buf, length=priv->sk_dev.d_len */ /* Enable Tx interrupts */ /* Setup the TX timeout watchdog (perhaps restarting the timer) */ (void)wd_start(priv->sk_txtimeout, skeleton_TXTIMEOUT, skel_txtimeout_expiry, 1, (uint32_t)priv); return OK; } /**************************************************************************** * Function: skel_txpoll * * Description: * The transmitter is available, check if uIP has any outgoing packets ready * to send. This is a callback from devif_poll(). devif_poll() may be called: * * 1. When the preceding TX packet send is complete, * 2. When the preceding TX packet send timesout and the interface is reset * 3. During normal TX polling * * Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * OK on success; a negated errno on failure * * Assumptions: * May or may not be called from an interrupt handler. In either case, * global interrupts are disabled, either explicitly or indirectly through * interrupt handling logic. * ****************************************************************************/ static int skel_txpoll(struct net_driver_s *dev) { FAR struct skel_driver_s *priv = (FAR struct skel_driver_s *)dev->d_private; /* If the polling resulted in data that should be sent out on the network, * the field d_len is set to a value > 0. */ if (priv->sk_dev.d_len > 0) { /* Look up the destination MAC address and add it to the Ethernet * header. */ #ifdef CONFIG_NET_IPv4 #ifdef CONFIG_NET_IPv6 if (IFF_IS_IPv4(priv->sk_dev.d_flags)) #endif { arp_out(&priv->sk_dev); } #endif /* CONFIG_NET_IPv4 */ #ifdef CONFIG_NET_IPv6 #ifdef CONFIG_NET_IPv4 else #endif { neighbor_out(&priv->sk_dev); } #endif /* CONFIG_NET_IPv6 */ /* Send the packet */ skel_transmit(priv); /* Check if there is room in the device to hold another packet. If not, * return a non-zero value to terminate the poll. */ } /* If zero is returned, the polling will continue until all connections have * been examined. */ return 0; } /**************************************************************************** * Function: skel_receive * * Description: * An interrupt was received indicating the availability of a new RX packet * * Parameters: * priv - Reference to the driver state structure * * Returned Value: * None * * Assumptions: * Global interrupts are disabled by interrupt handling logic. * ****************************************************************************/ static void skel_receive(FAR struct skel_driver_s *priv) { do { /* Check for errors and update statistics */ /* Check if the packet is a valid size for the uIP buffer configuration */ /* Copy the data data from the hardware to priv->sk_dev.d_buf. Set * amount of data in priv->sk_dev.d_len */ #ifdef CONFIG_NET_PKT /* When packet sockets are enabled, feed the frame into the packet tap */ pkt_input(&priv->sk_dev); #endif /* We only accept IP packets of the configured type and ARP packets */ #ifdef CONFIG_NET_IPv4 if (BUF->type == HTONS(ETHTYPE_IP)) { nllvdbg("IPv4 frame\n"); /* Handle ARP on input then give the IPv4 packet to the network * layer */ arp_ipin(&priv->sk_dev); ipv4_input(&priv->sk_dev); /* If the above function invocation resulted in data that should be * sent out on the network, the field d_len will set to a value > 0. */ if (priv->sk_dev.d_len > 0) { /* Update the Ethernet header with the correct MAC address */ #ifdef CONFIG_NET_IPv6 if (IFF_IS_IPv4(priv->sk_dev.d_flags)) #endif { arp_out(&priv->sk_dev); } #ifdef CONFIG_NET_IPv6 else { neighbor_out(&kel->sk_dev); } #endif /* And send the packet */ skel_transmit(priv); } } else #endif #ifdef CONFIG_NET_IPv6 if (BUF->type == HTONS(ETHTYPE_IP6)) { nllvdbg("Iv6 frame\n"); /* Give the IPv6 packet to the network layer */ ipv6_input(&priv->sk_dev); /* If the above function invocation resulted in data that should be * sent out on the network, the field d_len will set to a value > 0. */ if (priv->sk_dev.d_len > 0) { /* Update the Ethernet header with the correct MAC address */ #ifdef CONFIG_NET_IPv4 if (IFF_IS_IPv4(priv->sk_dev.d_flags)) { arp_out(&priv->sk_dev); } else #endif #ifdef CONFIG_NET_IPv6 { neighbor_out(&priv->sk_dev); } #endif /* And send the packet */ skel_transmit(priv); } } else #endif #ifdef CONFIG_NET_ARP if (BUF->type == htons(ETHTYPE_ARP)) { arp_arpin(&priv->sk_dev); /* If the above function invocation resulted in data that should be * sent out on the network, the field d_len will set to a value > 0. */ if (priv->sk_dev.d_len > 0) { skel_transmit(priv); } } #endif } while (); /* While there are more packets to be processed */ } /**************************************************************************** * Function: skel_txdone * * Description: * An interrupt was received indicating that the last TX packet(s) is done * * Parameters: * priv - Reference to the driver state structure * * Returned Value: * None * * Assumptions: * Global interrupts are disabled by the watchdog logic. * ****************************************************************************/ static void skel_txdone(FAR struct skel_driver_s *priv) { /* Check for errors and update statistics */ /* If no further xmits are pending, then cancel the TX timeout and * disable further Tx interrupts. */ wd_cancel(priv->sk_txtimeout); /* Then poll uIP for new XMIT data */ (void)devif_poll(&priv->sk_dev, skel_txpoll); } /**************************************************************************** * Function: skel_interrupt_process * * Description: * Interrupt processing. This may be performed either within the interrupt * handler or on the worker thread, depending upon the configuration * * Parameters: * priv - Reference to the driver state structure * * Returned Value: * None * * Assumptions: * Ethernet interrupts are disabled * ****************************************************************************/ static inline void skel_interrupt_process(FAR struct skel_driver_s *priv) { /* Get and clear interrupt status bits */ /* Handle interrupts according to status bit settings */ /* Check if we received an incoming packet, if so, call skel_receive() */ skel_receive(priv); /* Check if a packet transmission just completed. If so, call skel_txdone. * This may disable further Tx interrupts if there are no pending * transmissions. */ skel_txdone(priv); } /**************************************************************************** * Function: skel_interrupt_work * * Description: * Perform interrupt related work from the worker thread * * Parameters: * arg - The argument passed when work_queue() was called. * * Returned Value: * OK on success * * Assumptions: * Ethernet interrupts are disabled * ****************************************************************************/ #ifdef CONFIG_NET_NOINTS static void skel_interrupt_work(FAR void *arg) { FAR struct skel_driver_s *priv = (FAR struct skel_driver_s *)arg; net_lock_t state; /* Process pending Ethernet interrupts */ state = net_lock(); skel_interrupt_process(priv); net_unlock(state); /* Re-enable Ethernet interrupts */ up_enable_irq(CONFIG_skeleton_IRQ); } #endif /**************************************************************************** * Function: skel_interrupt * * Description: * Hardware interrupt handler * * Parameters: * irq - Number of the IRQ that generated the interrupt * context - Interrupt register state save info (architecture-specific) * * Returned Value: * OK on success * * Assumptions: * ****************************************************************************/ static int skel_interrupt(int irq, FAR void *context) { FAR struct skel_driver_s *priv = &g_skel[0]; #ifdef CONFIG_NET_NOINTS /* Disable further Ethernet interrupts. Because Ethernet interrupts are * also disabled if the TX timeout event occurs, there can be no race * condition here. */ up_disable_irq(CONFIG_skeleton_IRQ); /* TODO: Determine if a TX transfer just completed */ { /* If a TX transfer just completed, then cancel the TX timeout so * there will be do race condition between any subsequent timeout * expiration and the deferred interrupt processing. */ wd_cancel(priv->sk_txtimeout); } /* Cancel any pending poll work */ work_cancel(HPWORK, &priv->sk_work); /* Schedule to perform the interrupt processing on the worker thread. */ work_queue(HPWORK, &priv->sk_work, skel_interrupt_work, priv, 0); #else /* Process the interrupt now */ skel_interrupt_process(priv); #endif return OK; } /**************************************************************************** * Function: skel_txtimeout_process * * Description: * Process a TX timeout. Called from the either the watchdog timer * expiration logic or from the worker thread, depending upon the * configuration. The timeout means that the last TX never completed. * Reset the hardware and start again. * * Parameters: * priv - Reference to the driver state structure * * Returned Value: * None * * Assumptions: * Global interrupts are disabled by the watchdog logic. * ****************************************************************************/ static inline void skel_txtimeout_process(FAR struct skel_driver_s *priv) { /* Increment statistics and dump debug info */ /* Then reset the hardware */ /* Then poll uIP for new XMIT data */ (void)devif_poll(&priv->sk_dev, skel_txpoll); } /**************************************************************************** * Function: skel_txtimeout_work * * Description: * Perform TX timeout related work from the worker thread * * Parameters: * arg - The argument passed when work_queue() as called. * * Returned Value: * OK on success * * Assumptions: * Ethernet interrupts are disabled * ****************************************************************************/ #ifdef CONFIG_NET_NOINTS static void skel_txtimeout_work(FAR void *arg) { FAR struct skel_driver_s *priv = (FAR struct skel_driver_s *)arg; net_lock_t state; /* Process pending Ethernet interrupts */ state = net_lock(); skel_txtimeout_process(priv); net_unlock(state); } #endif /**************************************************************************** * Function: skel_txtimeout_expiry * * Description: * Our TX watchdog timed out. Called from the timer interrupt handler. * The last TX never completed. Reset the hardware and start again. * * Parameters: * argc - The number of available arguments * arg - The first argument * * Returned Value: * None * * Assumptions: * Global interrupts are disabled by the watchdog logic. * ****************************************************************************/ static void skel_txtimeout_expiry(int argc, uint32_t arg, ...) { FAR struct skel_driver_s *priv = (FAR struct skel_driver_s *)arg; #ifdef CONFIG_NET_NOINTS /* Disable further Ethernet interrupts. This will prevent some race * conditions with interrupt work. There is still a potential race * condition with interrupt work that is already queued and in progress. */ up_disable_irq(CONFIG_skeleton_IRQ); /* Cancel any pending poll or interrupt work. This will have no effect * on work that has already been started. */ work_cancel(HPWORK, &priv->sk_work); /* Schedule to perform the TX timeout processing on the worker thread. */ work_queue(HPWORK, &priv->sk_work, skel_txtimeout_work, priv, 0); #else /* Process the timeout now */ skel_txtimeout_process(priv); #endif } /**************************************************************************** * Function: skel_poll_process * * Description: * Perform the periodic poll. This may be called either from watchdog * timer logic or from the worker thread, depending upon the configuration. * * Parameters: * priv - Reference to the driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static inline void skel_poll_process(FAR struct skel_driver_s *priv) { /* Check if there is room in the send another TX packet. We cannot perform * the TX poll if he are unable to accept another packet for transmission. */ /* If so, update TCP timing states and poll uIP for new XMIT data. Hmmm.. * might be bug here. Does this mean if there is a transmit in progress, * we will missing TCP time state updates? */ (void)devif_timer(&priv->sk_dev, skel_txpoll, skeleton_POLLHSEC); /* Setup the watchdog poll timer again */ (void)wd_start(priv->sk_txpoll, skeleton_WDDELAY, skel_poll_expiry, 1, priv); } /**************************************************************************** * Function: skel_poll_work * * Description: * Perform periodic polling from the worker thread * * Parameters: * arg - The argument passed when work_queue() as called. * * Returned Value: * OK on success * * Assumptions: * Ethernet interrupts are disabled * ****************************************************************************/ #ifdef CONFIG_NET_NOINTS static void skel_poll_work(FAR void *arg) { FAR struct skel_driver_s *priv = (FAR struct skel_driver_s *)arg; net_lock_t state; /* Perform the poll */ state = net_lock(); skel_poll_process(priv); net_unlock(state); } #endif /**************************************************************************** * Function: skel_poll_expiry * * Description: * Periodic timer handler. Called from the timer interrupt handler. * * Parameters: * argc - The number of available arguments * arg - The first argument * * Returned Value: * None * * Assumptions: * Global interrupts are disabled by the watchdog logic. * ****************************************************************************/ static void skel_poll_expiry(int argc, uint32_t arg, ...) { FAR struct skel_driver_s *priv = (FAR struct skel_driver_s *)arg; #ifdef CONFIG_NET_NOINTS /* Is our single work structure available? It may not be if there are * pending interrupt actions. */ if (work_available(&priv->sk_work)) { /* Schedule to perform the interrupt processing on the worker thread. */ work_queue(HPWORK, &priv->sk_work, skel_poll_work, priv, 0); } else { /* No.. Just re-start the watchdog poll timer, missing one polling * cycle. */ (void)wd_start(priv->sk_txpoll, skeleton_WDDELAY, skel_poll_expiry, 1, arg); } #else /* Process the interrupt now */ skel_poll_process(priv); #endif } /**************************************************************************** * Function: skel_ifup * * Description: * NuttX Callback: Bring up the Ethernet interface when an IP address is * provided * * Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static int skel_ifup(struct net_driver_s *dev) { FAR struct skel_driver_s *priv = (FAR struct skel_driver_s *)dev->d_private; #ifdef CONFIG_NET_IPv4 ndbg("Bringing up: %d.%d.%d.%d\n", dev->d_ipaddr & 0xff, (dev->d_ipaddr >> 8) & 0xff, (dev->d_ipaddr >> 16) & 0xff, dev->d_ipaddr >> 24); #endif #ifdef CONFIG_NET_IPv6 ndbg("Bringing up: %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", dev->d_ipv6addr[0], dev->d_ipv6addr[1], dev->d_ipv6addr[2], dev->d_ipv6addr[3], dev->d_ipv6addr[4], dev->d_ipv6addr[5], dev->d_ipv6addr[6], dev->d_ipv6addr[7]); #endif /* Initialize PHYs, the Ethernet interface, and setup up Ethernet interrupts */ /* Instantiate the MAC address from priv->sk_dev.d_mac.ether_addr_octet */ #ifdef CONFIG_NET_ICMPv6 /* Set up IPv6 multicast address filtering */ skel_ipv6multicast(priv); #endif /* Set and activate a timer process */ (void)wd_start(priv->sk_txpoll, skeleton_WDDELAY, skel_poll_expiry, 1, (uint32_t)priv); /* Enable the Ethernet interrupt */ priv->sk_bifup = true; up_enable_irq(CONFIG_skeleton_IRQ); return OK; } /**************************************************************************** * Function: skel_ifdown * * Description: * NuttX Callback: Stop the interface. * * Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static int skel_ifdown(struct net_driver_s *dev) { FAR struct skel_driver_s *priv = (FAR struct skel_driver_s *)dev->d_private; irqstate_t flags; /* Disable the Ethernet interrupt */ flags = irqsave(); up_disable_irq(CONFIG_skeleton_IRQ); /* Cancel the TX poll timer and TX timeout timers */ wd_cancel(priv->sk_txpoll); wd_cancel(priv->sk_txtimeout); /* Put the EMAC in its reset, non-operational state. This should be * a known configuration that will guarantee the skel_ifup() always * successfully brings the interface back up. */ /* Mark the device "down" */ priv->sk_bifup = false; irqrestore(flags); return OK; } /**************************************************************************** * Function: skel_txavail_process * * Description: * Perform an out-of-cycle poll. * * Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * Called in normal user mode * ****************************************************************************/ static inline void skel_txavail_process(FAR struct skel_driver_s *priv) { /* Ignore the notification if the interface is not yet up */ if (priv->sk_bifup) { /* Check if there is room in the hardware to hold another outgoing packet. */ /* If so, then poll uIP for new XMIT data */ (void)devif_poll(&priv->sk_dev, skel_txpoll); } } /**************************************************************************** * Function: skel_txavail_work * * Description: * Perform an out-of-cycle poll on the worker thread. * * Parameters: * arg - Reference to the NuttX driver state structure (cast to void*) * * Returned Value: * None * * Assumptions: * Called on the higher priority worker thread. * ****************************************************************************/ #ifdef CONFIG_NET_NOINTS static void skel_txavail_work(FAR void *arg) { FAR struct skel_driver_s *priv = (FAR struct skel_driver_s *)arg; net_lock_t state; /* Perform the poll */ state = net_lock(); skel_txavail_process(priv); net_unlock(state); } #endif /**************************************************************************** * Function: skel_txavail * * Description: * Driver callback invoked when new TX data is available. This is a * stimulus perform an out-of-cycle poll and, thereby, reduce the TX * latency. * * Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * Called in normal user mode * ****************************************************************************/ static int skel_txavail(struct net_driver_s *dev) { FAR struct skel_driver_s *priv = (FAR struct skel_driver_s *)dev->d_private; #ifdef CONFIG_NET_NOINTS /* Is our single work structure available? It may not be if there are * pending interrupt actions and we will have to ignore the Tx * availability action. */ if (work_available(&priv->sk_work)) { /* Schedule to serialize the poll on the worker thread. */ work_queue(HPWORK, &priv->sk_work, skel_txavail_work, priv, 0); } #else irqstate_t flags; /* Disable interrupts because this function may be called from interrupt * level processing. */ flags = irqsave(); /* Perform the out-of-cycle poll now */ skel_txavail_process(priv); irqrestore(flags); #endif return OK; } /**************************************************************************** * Function: skel_addmac * * Description: * NuttX Callback: Add the specified MAC address to the hardware multicast * address filtering * * Parameters: * dev - Reference to the NuttX driver state structure * mac - The MAC address to be added * * Returned Value: * None * * Assumptions: * ****************************************************************************/ #if defined(CONFIG_NET_IGMP) || defined(CONFIG_NET_ICMPv6) static int skel_addmac(struct net_driver_s *dev, FAR const uint8_t *mac) { FAR struct skel_driver_s *priv = (FAR struct skel_driver_s *)dev->d_private; /* Add the MAC address to the hardware multicast routing table */ return OK; } #endif /**************************************************************************** * Function: skel_rmmac * * Description: * NuttX Callback: Remove the specified MAC address from the hardware multicast * address filtering * * Parameters: * dev - Reference to the NuttX driver state structure * mac - The MAC address to be removed * * Returned Value: * None * * Assumptions: * ****************************************************************************/ #ifdef CONFIG_NET_IGMP static int skel_rmmac(struct net_driver_s *dev, FAR const uint8_t *mac) { FAR struct skel_driver_s *priv = (FAR struct skel_driver_s *)dev->d_private; /* Add the MAC address to the hardware multicast routing table */ return OK; } #endif /**************************************************************************** * Function: skel_ipv6multicast * * Description: * Configure the IPv6 multicast MAC address. * * Parameters: * priv - A reference to the private driver state structure * * Returned Value: * OK on success; Negated errno on failure. * * Assumptions: * ****************************************************************************/ #ifdef CONFIG_NET_ICMPv6 static void skel_ipv6multicast(FAR struct skel_driver_s *priv) { FAR struct net_driver_s *dev; uint16_t tmp16; uint8_t mac[6]; /* For ICMPv6, we need to add the IPv6 multicast address * * For IPv6 multicast addresses, the Ethernet MAC is derived by * the four low-order octets OR'ed with the MAC 33:33:00:00:00:00, * so for example the IPv6 address FF02:DEAD:BEEF::1:3 would map * to the Ethernet MAC address 33:33:00:01:00:03. * * NOTES: This appears correct for the ICMPv6 Router Solicitation * Message, but the ICMPv6 Neighbor Solicitation message seems to * use 33:33:ff:01:00:03. */ mac[0] = 0x33; mac[1] = 0x33; dev = &priv->dev; tmp16 = dev->d_ipv6addr[6]; mac[2] = 0xff; mac[3] = tmp16 >> 8; tmp16 = dev->d_ipv6addr[7]; mac[4] = tmp16 & 0xff; mac[5] = tmp16 >> 8; nvdbg("IPv6 Multicast: %02x:%02x:%02x:%02x:%02x:%02x\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); (void)skel_addmac(dev, mac); #ifdef CONFIG_NET_ICMPv6_AUTOCONF /* Add the IPv6 all link-local nodes Ethernet address. This is the * address that we expect to receive ICMPv6 Router Advertisement * packets. */ (void)skel_addmac(dev, g_ipv6_ethallnodes.ether_addr_octet); #endif /* CONFIG_NET_ICMPv6_AUTOCONF */ #ifdef CONFIG_NET_ICMPv6_ROUTER /* Add the IPv6 all link-local routers Ethernet address. This is the * address that we expect to receive ICMPv6 Router Solicitation * packets. */ (void)skel_addmac(dev, g_ipv6_ethallrouters.ether_addr_octet); #endif /* CONFIG_NET_ICMPv6_ROUTER */ } #endif /* CONFIG_NET_ICMPv6 */ /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Function: skel_initialize * * Description: * Initialize the Ethernet controller and driver * * Parameters: * intf - In the case where there are multiple EMACs, this value * identifies which EMAC is to be initialized. * * Returned Value: * OK on success; Negated errno on failure. * * Assumptions: * ****************************************************************************/ int skel_initialize(int intf) { struct skel_driver_s *priv; /* Get the interface structure associated with this interface number. */ DEBUGASSERT(inf < CONFIG_skeleton_NINTERFACES); priv = &g_skel[intf]; /* Check if a Ethernet chip is recognized at its I/O base */ /* Attach the IRQ to the driver */ if (irq_attach(CONFIG_skeleton_IRQ, skel_interrupt)) { /* We could not attach the ISR to the interrupt */ return -EAGAIN; } /* Initialize the driver structure */ memset(priv, 0, sizeof(struct skel_driver_s)); priv->sk_dev.d_ifup = skel_ifup; /* I/F up (new IP address) callback */ priv->sk_dev.d_ifdown = skel_ifdown; /* I/F down callback */ priv->sk_dev.d_txavail = skel_txavail; /* New TX data callback */ #ifdef CONFIG_NET_IGMP priv->sk_dev.d_addmac = skel_addmac; /* Add multicast MAC address */ priv->sk_dev.d_rmmac = skel_rmmac; /* Remove multicast MAC address */ #endif priv->sk_dev.d_private = (void*)g_skel; /* Used to recover private state from dev */ /* Create a watchdog for timing polling for and timing of transmisstions */ priv->sk_txpoll = wd_create(); /* Create periodic poll timer */ priv->sk_txtimeout = wd_create(); /* Create TX timeout timer */ /* Put the interface in the down state. This usually amounts to resetting * the device and/or calling skel_ifdown(). */ /* Read the MAC address from the hardware into priv->sk_dev.d_mac.ether_addr_octet */ /* Register the device with the OS so that socket IOCTLs can be performed */ (void)netdev_register(&priv->sk_dev, NET_LL_ETHERNET); return OK; } #endif /* CONFIG_NET && CONFIG_NET_skeleton */