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Diffstat (limited to 'nuttx/drivers/net/skeleton.c')
-rw-r--r-- | nuttx/drivers/net/skeleton.c | 692 |
1 files changed, 0 insertions, 692 deletions
diff --git a/nuttx/drivers/net/skeleton.c b/nuttx/drivers/net/skeleton.c deleted file mode 100644 index 00ebea35f..000000000 --- a/nuttx/drivers/net/skeleton.c +++ /dev/null @@ -1,692 +0,0 @@ -/**************************************************************************** - * drivers/net/skeleton.c - * - * Copyright (C) 2011 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> -#if defined(CONFIG_NET) && defined(CONFIG_NET_skeleton) - -#include <stdint.h> -#include <stdbool.h> -#include <time.h> -#include <string.h> -#include <debug.h> -#include <wdog.h> -#include <errno.h> - -#include <nuttx/irq.h> -#include <nuttx/arch.h> - -#include <nuttx/net/uip/uip.h> -#include <nuttx/net/uip/uip-arp.h> -#include <nuttx/net/uip/uip-arch.h> - -/**************************************************************************** - * Definitions - ****************************************************************************/ - -/* 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 uip_eth_hdr *)skel->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 */ - - /* This holds the information visible to uIP/NuttX */ - - struct uip_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 *skel); -static int skel_uiptxpoll(struct uip_driver_s *dev); - -/* Interrupt handling */ - -static void skel_receive(FAR struct skel_driver_s *skel); -static void skel_txdone(FAR struct skel_driver_s *skel); -static int skel_interrupt(int irq, FAR void *context); - -/* Watchdog timer expirations */ - -static void skel_polltimer(int argc, uint32_t arg, ...); -static void skel_txtimeout(int argc, uint32_t arg, ...); - -/* NuttX callback functions */ - -static int skel_ifup(struct uip_driver_s *dev); -static int skel_ifdown(struct uip_driver_s *dev); -static int skel_txavail(struct uip_driver_s *dev); -#ifdef CONFIG_NET_IGMP -static int skel_addmac(struct uip_driver_s *dev, FAR const uint8_t *mac); -static int skel_rmmac(struct uip_driver_s *dev, FAR const uint8_t *mac); -#endif - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Function: skel_transmit - * - * Description: - * Start hardware transmission. Called either from the txdone interrupt - * handling or from watchdog based polling. - * - * Parameters: - * skel - 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 *skel) -{ - /* 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=skel->sk_dev.d_buf, length=skel->sk_dev.d_len */ - - /* Enable Tx interrupts */ - - /* Setup the TX timeout watchdog (perhaps restarting the timer) */ - - (void)wd_start(skel->sk_txtimeout, skeleton_TXTIMEOUT, skel_txtimeout, 1, (uint32_t)skel); - return OK; -} - -/**************************************************************************** - * Function: skel_uiptxpoll - * - * Description: - * The transmitter is available, check if uIP has any outgoing packets ready - * to send. This is a callback from uip_poll(). uip_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_uiptxpoll(struct uip_driver_s *dev) -{ - FAR struct skel_driver_s *skel = (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 (skel->sk_dev.d_len > 0) - { - uip_arp_out(&skel->sk_dev); - skel_transmit(skel); - - /* 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: - * skel - 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 *skel) -{ - 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 skel->sk_dev.d_buf. Set - * amount of data in skel->sk_dev.d_len - */ - - /* We only accept IP packets of the configured type and ARP packets */ - -#ifdef CONFIG_NET_IPv6 - if (BUF->type == HTONS(UIP_ETHTYPE_IP6)) -#else - if (BUF->type == HTONS(UIP_ETHTYPE_IP)) -#endif - { - uip_arp_ipin(&skel->sk_dev); - uip_input(&skel->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 (skel->sk_dev.d_len > 0) - { - uip_arp_out(&skel->sk_dev); - skel_transmit(skel); - } - } - else if (BUF->type == htons(UIP_ETHTYPE_ARP)) - { - uip_arp_arpin(&skel->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 (skel->sk_dev.d_len > 0) - { - skel_transmit(skel); - } - } - } - 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: - * skel - 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 *skel) -{ - /* Check for errors and update statistics */ - - /* If no further xmits are pending, then cancel the TX timeout and - * disable further Tx interrupts. - */ - - wd_cancel(skel->sk_txtimeout); - - /* Then poll uIP for new XMIT data */ - - (void)uip_poll(&skel->sk_dev, skel_uiptxpoll); -} - -/**************************************************************************** - * 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) -{ - register FAR struct skel_driver_s *skel = &g_skel[0]; - - /* 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(skel); - - /* Check if a packet transmission just completed. If so, call skel_txdone. - * This may disable further Tx interrupts if there are no pending - * tansmissions. - */ - - skel_txdone(skel); - - return OK; -} - -/**************************************************************************** - * Function: skel_txtimeout - * - * 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(int argc, uint32_t arg, ...) -{ - FAR struct skel_driver_s *skel = (FAR struct skel_driver_s *)arg; - - /* Increment statistics and dump debug info */ - - /* Then reset the hardware */ - - /* Then poll uIP for new XMIT data */ - - (void)uip_poll(&skel->sk_dev, skel_uiptxpoll); -} - -/**************************************************************************** - * Function: skel_polltimer - * - * 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_polltimer(int argc, uint32_t arg, ...) -{ - FAR struct skel_driver_s *skel = (FAR struct skel_driver_s *)arg; - - /* 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)uip_timer(&skel->sk_dev, skel_uiptxpoll, skeleton_POLLHSEC); - - /* Setup the watchdog poll timer again */ - - (void)wd_start(skel->sk_txpoll, skeleton_WDDELAY, skel_polltimer, 1, arg); -} - -/**************************************************************************** - * 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 uip_driver_s *dev) -{ - FAR struct skel_driver_s *skel = (FAR struct skel_driver_s *)dev->d_private; - - 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 ); - - /* Initialize PHYs, the Ethernet interface, and setup up Ethernet interrupts */ - - /* Set and activate a timer process */ - - (void)wd_start(skel->sk_txpoll, skeleton_WDDELAY, skel_polltimer, 1, (uint32_t)skel); - - /* Enable the Ethernet interrupt */ - - skel->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 uip_driver_s *dev) -{ - FAR struct skel_driver_s *skel = (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(skel->sk_txpoll); - wd_cancel(skel->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" */ - - skel->sk_bifup = false; - irqrestore(flags); - return OK; -} - -/**************************************************************************** - * 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 uip_driver_s *dev) -{ - FAR struct skel_driver_s *skel = (FAR struct skel_driver_s *)dev->d_private; - irqstate_t flags; - - /* Disable interrupts because this function may be called from interrupt - * level processing. - */ - - flags = irqsave(); - - /* Ignore the notification if the interface is not yet up */ - - if (skel->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)uip_poll(&skel->sk_dev, skel_uiptxpoll); - } - - irqrestore(flags); - 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: - * - ****************************************************************************/ - -#ifdef CONFIG_NET_IGMP -static int skel_addmac(struct uip_driver_s *dev, FAR const uint8_t *mac) -{ - FAR struct skel_driver_s *skel = (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 uip_driver_s *dev, FAR const uint8_t *mac) -{ - FAR struct skel_driver_s *skel = (FAR struct skel_driver_s *)dev->d_private; - - /* Add the MAC address to the hardware multicast routing table */ - - return OK; -} -#endif - -/**************************************************************************** - * 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); - return OK; -} - -#endif /* CONFIG_NET && CONFIG_NET_skeleton */ |