diff options
Diffstat (limited to 'nuttx/drivers')
-rw-r--r-- | nuttx/drivers/net/skeleton.c | 6 | ||||
-rwxr-xr-x | nuttx/drivers/usbhost/usbhost_rtl8187.c | 671 |
2 files changed, 674 insertions, 3 deletions
diff --git a/nuttx/drivers/net/skeleton.c b/nuttx/drivers/net/skeleton.c index c286886b9..16aab6d87 100644 --- a/nuttx/drivers/net/skeleton.c +++ b/nuttx/drivers/net/skeleton.c @@ -642,12 +642,12 @@ static int skel_rmmac(struct uip_driver_s *dev, FAR const uint8_t *mac) int skel_initialize(int intf) { - struct lpc17_driver_s *priv; + struct skel_driver_s *priv; /* Get the interface structure associated with this interface number. */ - DEBUGASSERT(inf < ONFIG_skeleton_NINTERFACES); - priv = &g_ethdrvr[intf]; + DEBUGASSERT(inf < CONFIG_skeleton_NINTERFACES); + priv = &g_skel[intf]; /* Check if a Ethernet chip is recognized at its I/O base */ diff --git a/nuttx/drivers/usbhost/usbhost_rtl8187.c b/nuttx/drivers/usbhost/usbhost_rtl8187.c index fa849ce12..81944df17 100755 --- a/nuttx/drivers/usbhost/usbhost_rtl8187.c +++ b/nuttx/drivers/usbhost/usbhost_rtl8187.c @@ -34,6 +34,9 @@ * ****************************************************************************/ +/* @TODO TEMPORARILY. REMOVE LATER!!! */ +#define CONFIG_WLAN_IRQ 1 + /**************************************************************************** * Included Files ****************************************************************************/ @@ -55,6 +58,25 @@ #include <nuttx/usb/usb.h> #include <nuttx/usb/usbhost.h> +#if defined(CONFIG_NET) && defined(CONFIG_NET_WLAN) + +#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 <net/uip/uip.h> +#include <net/uip/uip-arp.h> +#include <net/uip/uip-arch.h> + +#endif /* CONFIG_NET && CONFIG_NET_WLAN */ + /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ @@ -83,6 +105,30 @@ #define USBHOST_MAX_CREFS 0x7fff +#if defined(CONFIG_NET) && defined(CONFIG_NET_WLAN) +/* CONFIG_WLAN_NINTERFACES determines the number of physical interfaces + * that will be supported. + */ + +#ifndef CONFIG_WLAN_NINTERFACES +# define CONFIG_WLAN_NINTERFACES 1 +#endif + +/* TX poll delay = 1 seconds. CLK_TCK is the number of clock ticks per second */ + +#define WLAN_WDDELAY (1*CLK_TCK) +#define WLAN_POLLHSEC (1*2) + +/* TX timeout = 1 minute */ + +#define WLAN_TXTIMEOUT (60*CLK_TCK) + +/* This is a helper pointer for accessing the contents of the WLAN header */ + +#define BUF ((struct uip_eth_hdr *)wlan->wl_dev.d_buf) + +#endif /* CONFIG_NET && CONFIG_NET_WLAN */ + /**************************************************************************** * Private Types ****************************************************************************/ @@ -115,6 +161,25 @@ struct usbhost_state_s usbhost_ep_t epout; /* OUT endpoint */ }; +#if defined(CONFIG_NET) && defined(CONFIG_NET_WLAN) + + /* The wlan_driver_s encapsulates all state information for a single hardware + * interface + */ + + struct wlan_driver_s + { + bool wl_bifup; /* true:ifup false:ifdown */ + WDOG_ID wl_txpoll; /* TX poll timer */ + WDOG_ID wl_txtimeout; /* TX timeout timer */ + + /* This holds the information visible to uIP/NuttX */ + + struct uip_driver_s wl_dev; /* Interface understood by uIP */ + }; + +#endif /* CONFIG_NET && CONFIG_NET_WLAN */ + /**************************************************************************** * Private Function Prototypes ****************************************************************************/ @@ -172,6 +237,36 @@ static int usbhost_disconnected(FAR struct usbhost_class_s *class); /* Driver methods -- depend upon the type of NuttX driver interface exported */ +#if defined(CONFIG_NET) && defined(CONFIG_NET_WLAN) + +/* Common TX logic */ + +static int wlan_transmit(FAR struct wlan_driver_s *wlan); +static int wlan_uiptxpoll(struct uip_driver_s *dev); + +/* Interrupt handling */ + +static void wlan_receive(FAR struct wlan_driver_s *wlan); +static void wlan_txdone(FAR struct wlan_driver_s *wlan); +static int wlan_interrupt(int irq, FAR void *context); + +/* Watchdog timer expirations */ + +static void wlan_polltimer(int argc, uint32_t arg, ...); +static void wlan_txtimeout(int argc, uint32_t arg, ...); + +/* NuttX callback functions */ + +static int wlan_ifup(struct uip_driver_s *dev); +static int wlan_ifdown(struct uip_driver_s *dev); +static int wlan_txavail(struct uip_driver_s *dev); +#ifdef CONFIG_NET_IGMP +static int wlan_addmac(struct uip_driver_s *dev, FAR const uint8_t *mac); +static int wlan_rmmac(struct uip_driver_s *dev, FAR const uint8_t *mac); +#endif + +#endif /* CONFIG_NET && CONFIG_NET_WLAN */ + /**************************************************************************** * Private Data ****************************************************************************/ @@ -203,6 +298,12 @@ static struct usbhost_registry_s g_wlan = static uint32_t g_devinuse; +#if defined(CONFIG_NET) && defined(CONFIG_NET_WLAN) + +static struct wlan_driver_s g_wlan1[CONFIG_WLAN_NINTERFACES]; + +#endif /* CONFIG_NET && CONFIG_NET_WLAN */ + /**************************************************************************** * Private Functions ****************************************************************************/ @@ -1034,6 +1135,490 @@ static int usbhost_disconnected(struct usbhost_class_s *class) return OK; } +#if defined(CONFIG_NET) && defined(CONFIG_NET_WLAN) + +/**************************************************************************** + * Function: wlan_transmit + * + * Description: + * Start hardware transmission. Called either from the txdone interrupt + * handling or from watchdog based polling. + * + * Parameters: + * wlan - 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 wlan_transmit(FAR struct wlan_driver_s *wlan) +{ + /* 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 not transmission in progress. + */ + + /* Increment statistics */ + + /* Send the packet: address=wlan->wl_dev.d_buf, length=wlan->wl_dev.d_len */ + + /* Enable Tx interrupts */ + + /* Setup the TX timeout watchdog (perhaps restarting the timer) */ + + (void)wd_start(wlan->wl_txtimeout, WLAN_TXTIMEOUT, wlan_txtimeout, 1, (uint32_t)wlan); + return OK; +} + +/**************************************************************************** + * Function: wlan_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 wlan_uiptxpoll(struct uip_driver_s *dev) +{ + FAR struct wlan_driver_s *wlan = (FAR struct wlan_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 (wlan->wl_dev.d_len > 0) + { + uip_arp_out(&wlan->wl_dev); + wlan_transmit(wlan); + + /* 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: wlan_receive + * + * Description: + * An interrupt was received indicating the availability of a new RX packet + * + * Parameters: + * wlan - Reference to the driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * Global interrupts are disabled by interrupt handling logic. + * + ****************************************************************************/ + +static void wlan_receive(FAR struct wlan_driver_s *wlan) +{ + 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 wlan->wl_dev.d_buf. Set + * amount of data in wlan->wl_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(&wlan->wl_dev); + uip_input(&wlan->wl_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 (wlan->wl_dev.d_len > 0) + { + uip_arp_out(&wlan->wl_dev); + wlan_transmit(wlan); + } + } + else if (BUF->type == htons(UIP_ETHTYPE_ARP)) + { + uip_arp_arpin(&wlan->wl_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 (wlan->wl_dev.d_len > 0) + { + wlan_transmit(wlan); + } + } + } + while (0); /* While there are more packets to be processed */ +} + +/**************************************************************************** + * Function: wlan_txdone + * + * Description: + * An interrupt was received indicating that the last TX packet(s) is done + * + * Parameters: + * wlan - Reference to the driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * Global interrupts are disabled by the watchdog logic. + * + ****************************************************************************/ + +static void wlan_txdone(FAR struct wlan_driver_s *wlan) +{ + /* Check for errors and update statistics */ + + /* If no further xmits are pending, then cancel the TX timeout and + * disable further Tx interrupts. + */ + + wd_cancel(wlan->wl_txtimeout); + + /* Then poll uIP for new XMIT data */ + + (void)uip_poll(&wlan->wl_dev, wlan_uiptxpoll); +} + +/**************************************************************************** + * Function: wlan_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 wlan_interrupt(int irq, FAR void *context) +{ + register FAR struct wlan_driver_s *wlan = &g_wlan1[0]; + + /* Get and clear interrupt status bits */ + + /* Handle interrupts according to status bit settings */ + + /* Check if we received an incoming packet, if so, call wlan_receive() */ + + wlan_receive(wlan); + + /* Check is a packet transmission just completed. If so, call wlan_txdone. + * This may disable further Tx interrupts if there are no pending + * tansmissions. + */ + + wlan_txdone(wlan); + + return OK; +} + +/**************************************************************************** + * Function: wlan_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 wlan_txtimeout(int argc, uint32_t arg, ...) +{ + FAR struct wlan_driver_s *wlan = (FAR struct wlan_driver_s *)arg; + + /* Increment statistics and dump debug info */ + + /* Then reset the hardware */ + + /* Then poll uIP for new XMIT data */ + + (void)uip_poll(&wlan->wl_dev, wlan_uiptxpoll); +} + +/**************************************************************************** + * Function: wlan_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 wlan_polltimer(int argc, uint32_t arg, ...) +{ + FAR struct wlan_driver_s *wlan = (FAR struct wlan_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(&wlan->wl_dev, wlan_uiptxpoll, WLAN_POLLHSEC); + + /* Setup the watchdog poll timer again */ + + (void)wd_start(wlan->wl_txpoll, WLAN_WDDELAY, wlan_polltimer, 1, arg); +} + +/**************************************************************************** + * Function: wlan_ifup + * + * Description: + * NuttX Callback: Bring up the WLAN interface when an IP address is + * provided + * + * Parameters: + * dev - Reference to the NuttX driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * + ****************************************************************************/ + +static int wlan_ifup(struct uip_driver_s *dev) +{ + FAR struct wlan_driver_s *wlan = (FAR struct wlan_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 WLAN interface, and setup up WLAN interrupts */ + + /* Set and activate a timer process */ + + (void)wd_start(wlan->wl_txpoll, WLAN_WDDELAY, wlan_polltimer, 1, (uint32_t)wlan); + + /* Enable the WLAN interrupt */ + + wlan->wl_bifup = true; + up_enable_irq(CONFIG_WLAN_IRQ); + return OK; +} + +/**************************************************************************** + * Function: wlan_ifdown + * + * Description: + * NuttX Callback: Stop the interface. + * + * Parameters: + * dev - Reference to the NuttX driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * + ****************************************************************************/ + +static int wlan_ifdown(struct uip_driver_s *dev) +{ + FAR struct wlan_driver_s *wlan = (FAR struct wlan_driver_s *)dev->d_private; + irqstate_t flags; + + /* Disable the WLAN interrupt */ + + flags = irqsave(); + up_disable_irq(CONFIG_WLAN_IRQ); + + /* Cancel the TX poll timer and TX timeout timers */ + + wd_cancel(wlan->wl_txpoll); + wd_cancel(wlan->wl_txtimeout); + + /* Put the the EMAC is its reset, non-operational state. This should be + * a known configuration that will guarantee the wlan_ifup() always + * successfully brings the interface back up. + */ + + /* Mark the device "down" */ + + wlan->wl_bifup = false; + irqrestore(flags); + return OK; +} + +/**************************************************************************** + * Function: wlan_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 wlan_txavail(struct uip_driver_s *dev) +{ + FAR struct wlan_driver_s *wlan = (FAR struct wlan_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 (wlan->wl_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(&wlan->wl_dev, wlan_uiptxpoll); + } + + irqrestore(flags); + return OK; +} + +/**************************************************************************** + * Function: wlan_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 wlan_addmac(struct uip_driver_s *dev, FAR const uint8_t *mac) +{ + FAR struct wlan_driver_s *wlan = (FAR struct wlan_driver_s *)dev->d_private; + + /* Add the MAC address to the hardware multicast routing table */ + + return OK; +} +#endif + +/**************************************************************************** + * Function: wlan_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 wlan_rmmac(struct uip_driver_s *dev, FAR const uint8_t *mac) +{ + FAR struct wlan_driver_s *wlan = (FAR struct wlan_driver_s *)dev->d_private; + + /* Add the MAC address to the hardware multicast routing table */ + + return OK; +} +#endif + +#endif /* CONFIG_NET && CONFIG_NET_WLAN */ + /**************************************************************************** * Public Functions ****************************************************************************/ @@ -1063,3 +1648,89 @@ int usbhost_wlaninit(void) return usbhost_registerclass(&g_wlan); } + +#if defined(CONFIG_NET) && defined(CONFIG_NET_WLAN) + +/**************************************************************************** + * Function: wlan_initialize + * + * Description: + * Initialize the WLAN 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 wlan_initialize(int intf) +{ + struct wlan_driver_s *priv; + + /* Get the interface structure associated with this interface number. */ + + DEBUGASSERT(inf < CONFIG_WLAN_NINTERFACES); + priv = &g_wlan1[intf]; + + /* Check if a WLAN chip is recognized at its I/O base */ + + /* Attach the IRQ to the driver */ + + if (irq_attach(CONFIG_WLAN_IRQ, wlan_interrupt)) + { + /* We could not attach the ISR to the the interrupt */ + + return -EAGAIN; + } + + /* Initialize the driver structure */ + + memset(priv, 0, sizeof(struct wlan_driver_s)); + priv->wl_dev.d_ifup = wlan_ifup; /* I/F down callback */ + priv->wl_dev.d_ifdown = wlan_ifdown; /* I/F up (new IP address) callback */ + priv->wl_dev.d_txavail = wlan_txavail; /* New TX data callback */ +#ifdef CONFIG_NET_IGMP + priv->wl_dev.d_addmac = wlan_addmac; /* Add multicast MAC address */ + priv->wl_dev.d_rmmac = wlan_rmmac; /* Remove multicast MAC address */ +#endif + priv->wl_dev.d_private = (void*)g_wlan1; /* Used to recover private state from dev */ + + /* Create a watchdog for timing polling for and timing of transmisstions */ + + priv->wl_txpoll = wd_create(); /* Create periodic poll timer */ + priv->wl_txtimeout = wd_create(); /* Create TX timeout timer */ + + /* Put the interface in the down state. This usually amounts to resetting + * the device and/or calling wlan_ifdown(). + */ + + /* Read the MAC address from the hardware into priv->wl_dev.d_mac.ether_addr_octet */ + + /* Register the device with the OS so that socket IOCTLs can be performed */ + + (void)netdev_register(&priv->wl_dev); + return OK; +} + +/**************************************************************************** + * Name: up_netinitialize + * + * Description: + * Initialize the first network interface. If there are more than one + * interface in the device, then device-specific logic will have to provide + * this function to determine which, if any, WLAN controllers should + * be initialized. + * + ****************************************************************************/ + +void up_netinitialize(void) +{ + (void)wlan_initialize(0); +} +#endif /* CONFIG_NET && CONFIG_NET_WLAN */ + |