/**************************************************************************** * drivers/usbhost/usbhost_cdcecm.c * * SPDX-License-Identifier: Apache-2.0 * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Default max segment size if not specified by device */ #define CDCECM_DEFAULT_MAXSEG 1514 /* ECM control requests */ #define ECM_SET_PACKET_FILTER_REQUEST 0x43 /* ECM packet filter bits */ #define ECM_PACKET_TYPE_PROMISCUOUS (1 << 0) #define ECM_PACKET_TYPE_ALL_MULTICAST (1 << 1) #define ECM_PACKET_TYPE_DIRECTED (1 << 2) #define ECM_PACKET_TYPE_BROADCAST (1 << 3) #define ECM_PACKET_TYPE_MULTICAST (1 << 4) /* Default packet filter: unicast + broadcast */ #define ECM_DEFAULT_PACKET_FILTER (ECM_PACKET_TYPE_DIRECTED | \ ECM_PACKET_TYPE_BROADCAST) /* Configuration ************************************************************/ #ifndef CONFIG_SCHED_WORKQUEUE # warning "Worker thread support is required (CONFIG_SCHED_WORKQUEUE)" #endif #ifndef CONFIG_USBHOST_ASYNCH # warning Asynchronous transfer support is required (CONFIG_USBHOST_ASYNCH) #endif #ifdef CONFIG_USBHOST_CDCECM_NTDELAY # define USBHOST_CDCECM_NTDELAY MSEC2TICK(CONFIG_USBHOST_CDCECM_NTDELAY) #else # define USBHOST_CDCECM_NTDELAY MSEC2TICK(200) #endif #ifndef CONFIG_USBHOST_CDCECM_RXBUFSIZE #define CONFIG_USBHOST_CDCECM_RXBUFSIZE 2048 #endif #ifndef CONFIG_USBHOST_CDCECM_TXBUFSIZE #define CONFIG_USBHOST_CDCECM_TXBUFSIZE 2048 #endif /* Used in usbhost_cfgdesc() */ #define USBHOST_CTRLIFFOUND 0x01 #define USBHOST_DATAIFFOUND 0x02 #define USBHOST_INTRIFFOUND 0x04 #define USBHOST_BINFOUND 0x08 #define USBHOST_BOUTFOUND 0x10 #define USBHOST_ECMFOUND 0x20 #define USBHOST_ALLFOUND 0x3f #define USBHOST_MAX_CREFS 0x7fff /**************************************************************************** * Private Types ****************************************************************************/ struct usb_csifdesc_s { uint8_t len; uint8_t type; uint8_t subtype; }; /* This structure contains the internal, private state of the USB host class * driver. */ struct usbhost_cdcecm_s { /* This is the externally visible portion of the state */ struct usbhost_class_s usbclass; /* The remainder of the fields are provided to the class driver */ volatile bool disconnected; /* TRUE: Device has been disconnected */ uint16_t ctrlif; /* Control interface number */ uint16_t dataif; /* Data interface number */ int16_t crefs; /* Reference count on the driver instance */ mutex_t lock; /* Used to maintain mutual exclusive access */ struct work_s ntwork; /* Notification work */ struct work_s bulk_rxwork; struct work_s destroywork; int16_t nnbytes; /* Number of bytes received in notification */ int16_t bulkinbytes; uint16_t maxintsize; /* Maximum size of interrupt IN packet */ FAR uint8_t *ctrlreq; /* Allocated ctrl request structure */ FAR uint8_t *notification; /* Allocated RX buffer for async notifications */ FAR uint8_t *bulkinbuf; /* Allocated RX buffer for bulk IN */ FAR uint8_t *bulkoutbuf; /* Allocated TX buffer for bulk OUT */ usbhost_ep_t intin; /* Interrupt endpoint */ usbhost_ep_t bulkin; /* Bulk IN endpoint */ usbhost_ep_t bulkout; /* Bulk OUT endpoint */ uint16_t bulkmxpacket; /* Max packet size for Bulk OUT endpoint */ /* Device info from ECM descriptor */ uint16_t maxsegment; /* Max Ethernet frame size */ uint8_t macstridx; /* MAC address string index */ uint8_t macaddr[6]; /* Device MAC address */ /* Network device lowerhalf members */ netpkt_queue_t rx_queue; /* RX packet queue for lowerhalf */ bool bifup; /* true:ifup false:ifdown */ struct netdev_lowerhalf_s dev; /* lower half network interface */ }; /**************************************************************************** * Private Function Prototypes ****************************************************************************/ /* Memory allocation services */ static inline FAR struct usbhost_cdcecm_s *usbhost_allocclass(void); static inline void usbhost_freeclass(FAR struct usbhost_cdcecm_s *usbclass); /* Worker thread actions */ static void usbhost_notification_work(FAR void *arg); static void usbhost_notification_callback(FAR void *arg, ssize_t nbytes); static void usbhost_bulkin_work(FAR void *arg); static void usbhost_destroy(FAR void *arg); /* Helpers for usbhost_connect() */ static int usbhost_cfgdesc(FAR struct usbhost_cdcecm_s *priv, FAR const uint8_t *configdesc, int desclen); static inline int usbhost_devinit(FAR struct usbhost_cdcecm_s *priv); /* (Little Endian) Data helpers */ static inline uint16_t usbhost_getle16(const uint8_t *val); static inline void usbhost_putle16(uint8_t *dest, uint16_t val); static inline uint32_t usbhost_getle32(const uint8_t *val); /* Buffer memory management */ static int usbhost_alloc_buffers(FAR struct usbhost_cdcecm_s *priv); static void usbhost_free_buffers(FAR struct usbhost_cdcecm_s *priv); /* struct usbhost_registry_s methods */ static struct usbhost_class_s *usbhost_create(FAR struct usbhost_hubport_s *hport, FAR const struct usbhost_id_s *id); /* struct usbhost_class_s methods */ static int usbhost_connect(FAR struct usbhost_class_s *usbclass, FAR const uint8_t *configdesc, int desclen); static int usbhost_disconnected(FAR struct usbhost_class_s *usbclass); /* Lowerhalf network device operations */ static int cdcecm_net_ifup(FAR struct netdev_lowerhalf_s *dev); static int cdcecm_net_ifdown(FAR struct netdev_lowerhalf_s *dev); static int cdcecm_net_transmit(FAR struct netdev_lowerhalf_s *dev, FAR netpkt_t *pkt); static FAR netpkt_t *cdcecm_net_receive(FAR struct netdev_lowerhalf_s *dev); #ifdef CONFIG_NETDEV_IOCTL static int cdcecm_net_ioctl(FAR struct netdev_lowerhalf_s *dev, int cmd, unsigned long arg); #endif static void cdcecm_net_reclaim(FAR struct netdev_lowerhalf_s *dev); /**************************************************************************** * Private Data ****************************************************************************/ /* This structure provides the registry entry ID information that will be * used to associate the USB class driver to a connected USB device. */ static const struct usbhost_id_s g_cdcecm_id[] = { { USB_CLASS_CDC, /* base - CDC class */ CDC_SUBCLASS_NONE, /* subclass */ CDC_PROTO_NONE, /* proto */ 0, /* vid */ 0 /* pid */ }, { USB_CLASS_CDC, /* base - CDC class */ CDC_SUBCLASS_ECM, /* subclass - Ethernet Control Model */ CDC_PROTO_NONE, /* proto - No class specific protocol */ 0, /* vid - Any vendor */ 0 /* pid - Any product */ } }; /* This is the USB host storage class's registry entry */ static struct usbhost_registry_s g_cdcecm = { NULL, /* flink */ usbhost_create, /* create */ sizeof(g_cdcecm_id) / sizeof(g_cdcecm_id[0]), /* nids */ g_cdcecm_id /* id[] */ }; /* Netdev operations */ static const struct netdev_ops_s g_cdcecm_netdev_ops = { .ifup = cdcecm_net_ifup, .ifdown = cdcecm_net_ifdown, .transmit = cdcecm_net_transmit, .receive = cdcecm_net_receive, #ifdef CONFIG_NETDEV_IOCTL .ioctl = cdcecm_net_ioctl, #endif .reclaim = cdcecm_net_reclaim, }; /**************************************************************************** * Private Functions ****************************************************************************/ #if defined(USBHOST_CDCECM_PACKET_PRINT) # define cdcecm_print_packet(m,b,n) uinfodumpbuffer(m,b,n) #else # define cdcecm_print_packet(m,b,n) {} #endif static int usbhost_ctrl_cmd(FAR struct usbhost_cdcecm_s *priv, uint8_t type, uint8_t req, uint16_t value, uint16_t index, uint8_t *payload, uint16_t len) { FAR struct usbhost_hubport_s *hport; struct usb_ctrlreq_s *ctrlreq; int ret; hport = priv->usbclass.hport; ctrlreq = (struct usb_ctrlreq_s *)priv->ctrlreq; ctrlreq->type = type; ctrlreq->req = req; usbhost_putle16(ctrlreq->value, value); usbhost_putle16(ctrlreq->index, index); usbhost_putle16(ctrlreq->len, len); if (type & USB_REQ_DIR_IN) { ret = DRVR_CTRLIN(hport->drvr, hport->ep0, ctrlreq, payload); } else { ret = DRVR_CTRLOUT(hport->drvr, hport->ep0, ctrlreq, payload); } return ret; } /**************************************************************************** * Name: usbhost_allocclass * * Description: * This is really part of the logic that implements the create() method * of struct usbhost_registry_s. This function allocates memory for one * new class instance. * * Input Parameters: * None * * Returned Value: * On success, this function will return a non-NULL instance of struct * usbhost_class_s. NULL is returned on failure; this function will * will fail only if there are insufficient resources to create another * USB host class instance. * ****************************************************************************/ static inline FAR struct usbhost_cdcecm_s *usbhost_allocclass(void) { FAR struct usbhost_cdcecm_s *priv; DEBUGASSERT(!up_interrupt_context()); priv = (FAR struct usbhost_cdcecm_s *)kmm_malloc( sizeof(struct usbhost_cdcecm_s)); uinfo("Allocated: %p\n", priv); return priv; } /**************************************************************************** * Name: usbhost_freeclass * * Description: * Free a class instance previously allocated by usbhost_allocclass(). * * Input Parameters: * usbclass - A reference to the class instance to be freed. * * Returned Value: * None * ****************************************************************************/ static inline void usbhost_freeclass(FAR struct usbhost_cdcecm_s *usbclass) { DEBUGASSERT(usbclass != NULL); /* Free the class instance (perhaps calling sched_kmm_free() in case we are * executing from an interrupt handler. */ uinfo("Freeing: %p\n", usbclass); kmm_free(usbclass); } static void usbhost_bulkin_callback(FAR void *arg, ssize_t nbytes) { struct usbhost_cdcecm_s *priv = (struct usbhost_cdcecm_s *)arg; uint32_t delay = 0; DEBUGASSERT(priv); /* We can't lock the mutex from an interrupt context */ if (priv->disconnected) { return; } priv->bulkinbytes = (int16_t)nbytes; if (nbytes < 0) { if (nbytes != -EAGAIN) { uerr("ERROR: Transfer failed: %d\n", nbytes); } delay = MSEC2TICK(30); } if (work_available(&priv->bulk_rxwork)) { work_queue(LPWORK, &priv->bulk_rxwork, usbhost_bulkin_work, priv, delay); } } static void usbhost_bulkin_work(FAR void *arg) { struct usbhost_cdcecm_s *priv; struct usbhost_hubport_s *hport; FAR netpkt_t *pkt = NULL; priv = (struct usbhost_cdcecm_s *)arg; DEBUGASSERT(priv); nxmutex_lock(&priv->lock); hport = priv->usbclass.hport; DEBUGASSERT(hport); if (priv->disconnected || !priv->bifup) { nxmutex_unlock(&priv->lock); return; } /* Process received data into netpkt and queue for upper half */ if (priv->bulkinbytes > 0) { uinfo("received packet: %d len\n", priv->bulkinbytes); cdcecm_print_packet("ECM RX Packet:", priv->bulkinbuf, priv->bulkinbytes); /* ECM sends raw Ethernet frames - no additional framing */ pkt = netpkt_alloc(&priv->dev, NETPKT_RX); if (pkt != NULL) { int ret = netpkt_copyin(&priv->dev, pkt, priv->bulkinbuf, priv->bulkinbytes, 0); if (ret < 0) { netpkt_free(&priv->dev, pkt, NETPKT_RX); pkt = NULL; } else { ret = netpkt_tryadd_queue(pkt, &priv->rx_queue); if (ret != 0) { netpkt_free(&priv->dev, pkt, NETPKT_RX); pkt = NULL; } } } } else if (priv->bulkinbytes < 0 && priv->bulkinbytes != -EAGAIN) { uerr("Bulk IN error: %d\n", priv->bulkinbytes); } /* Restart async RX */ DRVR_ASYNCH(hport->drvr, priv->bulkin, (uint8_t *)priv->bulkinbuf, CONFIG_USBHOST_CDCECM_RXBUFSIZE, usbhost_bulkin_callback, priv); nxmutex_unlock(&priv->lock); /* Notify upper half after unlocking to avoid deadlock */ if (pkt != NULL) { netdev_lower_rxready(&priv->dev); } } /**************************************************************************** * Name: usbhost_notification_work * * Description: * Handle receipt of an asynchronous notification from the CDC device * * Input Parameters: * arg - The argument provided with the asynchronous I/O was setup * * Returned Value: * None * ****************************************************************************/ static void usbhost_notification_work(FAR void *arg) { FAR struct usbhost_cdcecm_s *priv; FAR struct usbhost_hubport_s *hport; FAR struct cdc_notification_s *inmsg; int ret; priv = (FAR struct usbhost_cdcecm_s *)arg; DEBUGASSERT(priv); nxmutex_lock(&priv->lock); hport = priv->usbclass.hport; DEBUGASSERT(hport); /* Are we still connected? */ if (!priv->disconnected && priv->intin) { /* Yes.. Was an interrupt IN message received correctly? */ if (priv->nnbytes >= 0) { /* Yes.. decode the notification */ inmsg = (FAR struct cdc_notification_s *)priv->notification; if ((inmsg->type & USB_REQ_TYPE_MASK) == USB_REQ_TYPE_CLASS) { switch (inmsg->notification) { case ECM_NETWORK_CONNECTION: /* Link state changed. This is supposed to be sent only * on-change, but I found some devices send it repeatedly. * So only update on-change to avoid a spam of prints */ if (inmsg->value[0] && !IFF_IS_RUNNING(priv->dev.netdev.d_flags)) { uinfo("Network connected\n"); netdev_lower_carrier_on(&priv->dev); } else if (!inmsg->value[0] && IFF_IS_RUNNING(priv->dev.netdev.d_flags)) { uinfo("Network disconnected\n"); netdev_lower_carrier_off(&priv->dev); } break; case ECM_SPEED_CHANGE: /* Connection speed changed - informational only. * Disabled print since some adapters send this very * frequently even if there is no change */ /* uinfo("Speed change notification\n"); */ break; default: uinfo("Unknown notification: 0x%02x\n", inmsg->notification); break; } } } /* Setup to receive the next notification */ ret = DRVR_ASYNCH(hport->drvr, priv->intin, (FAR uint8_t *)priv->notification, priv->maxintsize, usbhost_notification_callback, priv); if (ret < 0) { uerr("ERROR: DRVR_ASYNCH failed: %d\n", ret); } } nxmutex_unlock(&priv->lock); } /**************************************************************************** * Name: usbhost_notification_callback * * Description: * Handle receipt of Response Available from the CDC/ECM device * * Input Parameters: * arg - The argument provided with the asynchronous I/O was setup * nbytes - The number of bytes actually transferred (or a negated errno * value; * * Returned Value: * None * * Assumptions: * Probably called from an interrupt handler. * ****************************************************************************/ static void usbhost_notification_callback(FAR void *arg, ssize_t nbytes) { FAR struct usbhost_cdcecm_s *priv = (FAR struct usbhost_cdcecm_s *)arg; uint32_t delay = 0; DEBUGASSERT(priv); /* We can't lock the mutex from an interrupt context */ /* Are we still connected? */ if (!priv->disconnected) { /* Check for a failure. On higher end host controllers, the * asynchronous transfer will pend until data is available (OHCI and * EHCI). On lower end host controllers (like STM32 and EFM32), the * transfer will fail immediately when the device NAKs the first * attempted interrupt IN transfer (with nbytes == -EAGAIN). In that * case (or in the case of other errors), we must fall back to * polling. */ DEBUGASSERT(nbytes >= INT16_MIN && nbytes <= INT16_MAX); priv->nnbytes = (int16_t)nbytes; if (nbytes < 0) { /* This debug output is good to know, but really a nuisance for * those configurations where we have to fall back to polling. * FIX: Don't output the message is the result is -EAGAIN. */ #if defined(CONFIG_DEBUG_USB) && !defined(CONFIG_DEBUG_INFO) if (nbytes != -EAGAIN) #endif { uerr("ERROR: Transfer failed: %d\n", nbytes); } /* We don't know the nature of the failure, but we need to do all * that we can do to avoid a CPU hog error loop. * * Use the low-priority work queue and delay polling for the next * event. We want to use as little CPU bandwidth as possible in * this case. */ delay = USBHOST_CDCECM_NTDELAY; } /* Make sure that the work structure available. There is a remote * chance that this may collide with a device disconnection event. */ if (work_available(&priv->ntwork)) { work_queue(LPWORK, &priv->ntwork, usbhost_notification_work, priv, delay); } } } /**************************************************************************** * Name: usbhost_destroy * * Description: * The USB device has been disconnected and the reference count on the USB * host class instance has gone to 1.. Time to destroy the USB host class * instance. * * Input Parameters: * arg - A reference to the class instance to be destroyed. * * Returned Value: * None * ****************************************************************************/ static void usbhost_destroy(FAR void *arg) { FAR struct usbhost_cdcecm_s *priv = (FAR struct usbhost_cdcecm_s *)arg; FAR struct usbhost_hubport_s *hport; FAR struct usbhost_driver_s *drvr; DEBUGASSERT(priv != NULL && priv->usbclass.hport != NULL); hport = priv->usbclass.hport; DEBUGASSERT(hport->drvr); drvr = hport->drvr; uinfo("crefs: %d\n", priv->crefs); /* Unregister the network device */ netdev_lower_unregister(&priv->dev); /* Cancel any pending work */ work_cancel(LPWORK, &priv->ntwork); work_cancel(LPWORK, &priv->bulk_rxwork); /* Free the endpoints */ if (priv->intin) { DRVR_EPFREE(hport->drvr, priv->intin); } if (priv->bulkin) { DRVR_EPFREE(hport->drvr, priv->bulkin); } if (priv->bulkout) { DRVR_EPFREE(hport->drvr, priv->bulkout); } /* Free any transfer buffers */ usbhost_free_buffers(priv); /* Free the function address assigned to this device */ usbhost_devaddr_destroy(hport, hport->funcaddr); hport->funcaddr = 0; /* Disconnect the USB host device */ DRVR_DISCONNECT(drvr, hport); /* And free the class instance. Hmmm.. this may execute on the worker * thread and the work structure is part of what is getting freed. That * should be okay because once the work contained is removed from the * queue, it should not longer be accessed by the worker thread. */ usbhost_freeclass(priv); } /**************************************************************************** * Name: usbhost_cfgdesc * * Description: * This function implements the connect() method of struct * usbhost_class_s. This method is a callback into the class * implementation. It is used to provide the device's configuration * descriptor to the class so that the class may initialize properly * * Input Parameters: * priv - The USB host class instance. * configdesc - A pointer to a uint8_t buffer container the configuration * descriptor. * desclen - The length in bytes of the configuration descriptor. * * Returned Value: * On success, zero (OK) is returned. On a failure, a negated errno value * is returned indicating the nature of the failure * * Assumptions: * This function will *not* be called from an interrupt handler. * ****************************************************************************/ static int usbhost_cfgdesc(FAR struct usbhost_cdcecm_s *priv, FAR const uint8_t *configdesc, int desclen) { FAR struct usbhost_hubport_s *hport; FAR struct usb_cfgdesc_s *cfgdesc; FAR struct usb_desc_s *desc; FAR struct usbhost_epdesc_s bindesc; FAR struct usbhost_epdesc_s boutdesc; FAR struct usbhost_epdesc_s iindesc; int remaining; uint8_t found = 0; int ret; DEBUGASSERT(priv != NULL && priv->usbclass.hport && configdesc != NULL && desclen >= sizeof(struct usb_cfgdesc_s)); hport = priv->usbclass.hport; /* Verify that we were passed a configuration descriptor */ cfgdesc = (FAR struct usb_cfgdesc_s *)configdesc; if (cfgdesc->type != USB_DESC_TYPE_CONFIG) { return -EINVAL; } /* Get the total length of the configuration descriptor (little endian). * It might be a good check to get the number of interfaces here too. */ remaining = (int)usbhost_getle16(cfgdesc->totallen); /* Skip to the next entry descriptor */ configdesc += cfgdesc->len; remaining -= cfgdesc->len; /* Loop where there are more descriptors to examine */ while (remaining >= sizeof(struct usb_desc_s)) { /* What is the next descriptor? */ desc = (FAR struct usb_desc_s *)configdesc; switch (desc->type) { case USB_DESC_TYPE_CSINTERFACE: { FAR struct usb_csifdesc_s *csdesc = (FAR struct usb_csifdesc_s *) desc; if (csdesc->subtype == CDC_DSUBTYPE_ECM && desc->len >= sizeof(struct cdc_ecm_funcdesc_s)) { /* ECM functional descriptor */ FAR struct cdc_ecm_funcdesc_s *ecmdesc = (FAR struct cdc_ecm_funcdesc_s *)desc; priv->macstridx = ecmdesc->mac; priv->maxsegment = usbhost_getle16(ecmdesc->maxseg); uinfo("ECM: mac_idx=%d maxseg=%d\n", priv->macstridx, priv->maxsegment); found |= USBHOST_ECMFOUND; } } break; /* Interface descriptor. We really should get the number of endpoints * from this descriptor too. */ case USB_DESC_TYPE_INTERFACE: { FAR struct usb_ifdesc_s *ifdesc = (FAR struct usb_ifdesc_s *) configdesc; uinfo("Interface descriptor\n"); DEBUGASSERT(remaining >= USB_SIZEOF_IFDESC); /* Is this the control interface? */ if (ifdesc->classid == CDC_CLASS_COMM && ifdesc->subclass == CDC_SUBCLASS_ECM && ifdesc->protocol == CDC_PROTO_NONE) { priv->ctrlif = ifdesc->ifno; found |= USBHOST_CTRLIFFOUND; } /* Is this the data interface? */ else if (ifdesc->classid == USB_CLASS_CDC_DATA && ifdesc->subclass == CDC_SUBCLASS_NONE && ifdesc->protocol == CDC_DATA_PROTO_NONE) { priv->dataif = ifdesc->ifno; found |= USBHOST_DATAIFFOUND; } } break; /* Endpoint descriptor. Here, we expect two bulk endpoints, an IN * and an OUT. */ case USB_DESC_TYPE_ENDPOINT: { FAR struct usb_epdesc_s *epdesc = (FAR struct usb_epdesc_s *) configdesc; uinfo("Endpoint descriptor\n"); DEBUGASSERT(remaining >= USB_SIZEOF_EPDESC); /* Check for interrupt endpoint */ if ((epdesc->attr & USB_EP_ATTR_XFERTYPE_MASK) == USB_EP_ATTR_XFER_INT) { if (USB_ISEPIN(epdesc->addr)) { found |= USBHOST_INTRIFFOUND; iindesc.hport = hport; iindesc.addr = epdesc->addr & USB_EP_ADDR_NUMBER_MASK; iindesc.in = true; iindesc.xfrtype = USB_EP_ATTR_XFER_INT; iindesc.interval = epdesc->interval; iindesc.mxpacketsize = usbhost_getle16(epdesc->mxpacketsize); uinfo("Interrupt IN EP addr:%d mxpacketsize:%d\n", iindesc.addr, iindesc.mxpacketsize); priv->maxintsize = iindesc.mxpacketsize; } } /* Check for a bulk endpoint. */ else if ((epdesc->attr & USB_EP_ATTR_XFERTYPE_MASK) == USB_EP_ATTR_XFER_BULK) { /* Yes.. it is a bulk endpoint. IN or OUT? */ if (USB_ISEPOUT(epdesc->addr)) { /* It is an OUT bulk endpoint. There should be only one * bulk OUT endpoint. */ if ((found & USBHOST_BOUTFOUND) != 0) { /* Oops.. more than one endpoint. We don't know * what to do with this. */ return -EINVAL; } found |= USBHOST_BOUTFOUND; /* Save the bulk OUT endpoint information */ boutdesc.hport = hport; boutdesc.addr = epdesc->addr & USB_EP_ADDR_NUMBER_MASK; boutdesc.in = false; boutdesc.xfrtype = USB_EP_ATTR_XFER_BULK; boutdesc.interval = epdesc->interval; boutdesc.mxpacketsize = usbhost_getle16(epdesc->mxpacketsize); uinfo("Bulk OUT EP addr:%d mxpacketsize:%d\n", boutdesc.addr, boutdesc.mxpacketsize); priv->bulkmxpacket = boutdesc.mxpacketsize; } else { /* It is an IN bulk endpoint. There should be only one * bulk IN endpoint. */ if ((found & USBHOST_BINFOUND) != 0) { /* Oops.. more than one endpoint. We don't know * what to do with this. */ return -EINVAL; } found |= USBHOST_BINFOUND; /* Save the bulk IN endpoint information */ bindesc.hport = hport; bindesc.addr = epdesc->addr & USB_EP_ADDR_NUMBER_MASK; bindesc.in = 1; bindesc.xfrtype = USB_EP_ATTR_XFER_BULK; bindesc.interval = epdesc->interval; bindesc.mxpacketsize = usbhost_getle16(epdesc->mxpacketsize); uinfo("Bulk IN EP addr:%d mxpacketsize:%d\n", bindesc.addr, bindesc.mxpacketsize); } } } break; /* Other descriptors are just ignored for now */ default: break; } /* If we found everything we need with this interface, then break out * of the loop early. */ if (found == USBHOST_ALLFOUND) { break; } /* Increment the address of the next descriptor */ configdesc += desc->len; remaining -= desc->len; } /* Sanity checking... did we find all of things that we need? */ if (found != USBHOST_ALLFOUND) { uerr("ERROR: Found CTRLIF:%s DATAIF: %s INTR: %s " "BIN:%s BOUT:%s ECM: %s\n", (found & USBHOST_CTRLIFFOUND) != 0 ? "YES" : "NO", (found & USBHOST_DATAIFFOUND) != 0 ? "YES" : "NO", (found & USBHOST_INTRIFFOUND) != 0 ? "YES" : "NO", (found & USBHOST_BINFOUND) != 0 ? "YES" : "NO", (found & USBHOST_BOUTFOUND) != 0 ? "YES" : "NO", (found & USBHOST_ECMFOUND) != 0 ? "YES" : "NO"); return -EINVAL; } /* Set default max segment size if not provided */ if (priv->maxsegment == 0) { priv->maxsegment = CDCECM_DEFAULT_MAXSEG; } /* We are good... Allocate the endpoints */ ret = DRVR_EPALLOC(hport->drvr, &boutdesc, &priv->bulkout); if (ret < 0) { uerr("ERROR: Failed to allocate Bulk OUT endpoint\n"); return ret; } ret = DRVR_EPALLOC(hport->drvr, &bindesc, &priv->bulkin); if (ret < 0) { uerr("ERROR: Failed to allocate Bulk IN endpoint\n"); (void)DRVR_EPFREE(hport->drvr, priv->bulkout); return ret; } ret = DRVR_EPALLOC(hport->drvr, &iindesc, &priv->intin); if (ret < 0) { uerr("ERROR: Failed to allocate Interrupt IN endpoint\n"); (void)DRVR_EPFREE(hport->drvr, priv->bulkout); (void)DRVR_EPFREE(hport->drvr, priv->bulkin); return ret; } uinfo("Endpoints allocated\n"); return OK; } static int usbhost_setinterface(FAR struct usbhost_cdcecm_s *priv, uint16_t iface, uint16_t setting) { return usbhost_ctrl_cmd(priv, USB_REQ_DIR_OUT | USB_REQ_TYPE_STANDARD | USB_REQ_RECIPIENT_INTERFACE, USB_REQ_SETINTERFACE, setting, iface, NULL, 0); } /**************************************************************************** * Name: usbhost_parse_mac_string * * Description: * Parse MAC address from USB string descriptor. * The string is a Unicode representation of the MAC address as hex digits * (e.g., "001122334455" -> 0x00, 0x11, 0x22, 0x33, 0x44, 0x55). * ****************************************************************************/ static int usbhost_parse_mac_string(FAR const uint8_t * strdesc, FAR uint8_t * macaddr) { FAR const uint8_t * unicode; int len; int i; uint8_t byte; uint8_t nibble; /* String descriptor format: * byte 0: length * byte 1: descriptor type (3) * bytes 2+: Unicode string (16-bit chars) */ if (strdesc[0] < 26 || strdesc[1] != USB_DESC_TYPE_STRING) { uerr("Invalid MAC string descriptor\n"); return -EINVAL; } len = (strdesc[0] - 2) / 2; /* Number of Unicode characters */ if (len < 12) { uerr("MAC string too short: %d chars\n", len); return -EINVAL; } unicode = &strdesc[2]; for (i = 0; i < 6; i++) { /* Parse high nibble */ nibble = unicode[i * 4]; /* Unicode chars are 2 bytes each */ if (nibble >= '0' && nibble <= '9') { byte = (nibble - '0') << 4; } else if (nibble >= 'A' && nibble <= 'F') { byte = (nibble - 'A' + 10) << 4; } else if (nibble >= 'a' && nibble <= 'f') { byte = (nibble - 'a' + 10) << 4; } else { return -EINVAL; } /* Parse low nibble */ nibble = unicode[i * 4 + 2]; if (nibble >= '0' && nibble <= '9') { byte |= (nibble - '0'); } else if (nibble >= 'A' && nibble <= 'F') { byte |= (nibble - 'A' + 10); } else if (nibble >= 'a' && nibble <= 'f') { byte |= (nibble - 'a' + 10); } else { return -EINVAL; } macaddr[i] = byte; } return OK; } /**************************************************************************** * Name: usbhost_get_mac_address * * Description: * Retrieve MAC address from the device using the string descriptor index * from the ECM functional descriptor. * ****************************************************************************/ static int usbhost_get_mac_address(FAR struct usbhost_cdcecm_s * priv) { int ret; uint8_t *strbuf; if (priv->macstridx == 0) { uwarn("No MAC address string index provided\n"); return -ENOENT; } ret = DRVR_IOALLOC(priv->usbclass.hport->drvr, &strbuf, 64); if (ret < 0) { uerr("ERROR: DRVR_IOALLOC of notification buf failed: %d (%d bytes)\n", ret, priv->maxintsize); return ret; } ret = usbhost_ctrl_cmd(priv, USB_REQ_DIR_IN | USB_REQ_TYPE_STANDARD | USB_REQ_RECIPIENT_DEVICE, USB_REQ_GETDESCRIPTOR, (USB_DESC_TYPE_STRING << 8) | priv->macstridx, 0x0409, strbuf, 64); if (ret < 0) { uerr("Failed to get MAC string descriptor: %d\n", ret); goto errout; } /* Parse MAC address from Unicode string */ ret = usbhost_parse_mac_string(strbuf, priv->macaddr); if (ret < 0) { uerr("Failed to parse MAC address: %d\n", ret); goto errout; } uinfo("Device MAC: %02x:%02x:%02x:%02x:%02x:%02x\n", priv->macaddr[0], priv->macaddr[1], priv->macaddr[2], priv->macaddr[3], priv->macaddr[4], priv->macaddr[5]); ret = OK; errout: (void)DRVR_IOFREE(priv->usbclass.hport->drvr, strbuf); return ret; } /**************************************************************************** * Name: usbhost_set_packet_filter * * Description: * Set the ECM packet filter on the device. * ****************************************************************************/ static int usbhost_set_packet_filter(FAR struct usbhost_cdcecm_s * priv, uint16_t filter) { return usbhost_ctrl_cmd(priv, USB_REQ_DIR_OUT | USB_REQ_TYPE_CLASS | USB_REQ_RECIPIENT_INTERFACE, ECM_SET_PACKET_FILTER_REQUEST, filter, priv->ctrlif, NULL, 0); } /**************************************************************************** * Name: usbhost_devinit * * Description: * The USB device has been successfully connected. This completes the * initialization operations. It is first called after the * configuration descriptor has been received. * * This function is called from the connect() method. This function always * executes on the thread of the caller of connect(). * * Input Parameters: * priv - A reference to the class instance. * * Returned Value: * None * ****************************************************************************/ static inline int usbhost_devinit(FAR struct usbhost_cdcecm_s *priv) { FAR struct usbhost_hubport_s *hport; int ret = OK; hport = priv->usbclass.hport; /* Increment the reference count. This will prevent usbhost_destroy() from * being called asynchronously if the device is removed. */ priv->crefs++; DEBUGASSERT(priv->crefs == 2); /* Configure the device */ /* Set aside transfer buffers for exclusive use by the class driver */ ret = usbhost_alloc_buffers(priv); if (ret) { uerr("ERROR: failed to allocate buffers\n"); return ret; } /* Get MAC address from device */ ret = usbhost_get_mac_address(priv); if (ret < 0) { /* Generate a random MAC if we couldn't get one */ uwarn("Using random MAC address\n"); priv->macaddr[0] = 0x02; /* Locally administered */ priv->macaddr[1] = rand() & 0xff; priv->macaddr[2] = rand() & 0xff; priv->macaddr[3] = rand() & 0xff; priv->macaddr[4] = rand() & 0xff; priv->macaddr[5] = rand() & 0xff; } /* Setup and register the lowerhalf network device */ FAR struct netdev_lowerhalf_s *dev = &priv->dev; memset(dev, 0, sizeof(*dev)); memcpy(dev->netdev.d_mac.ether.ether_addr_octet, priv->macaddr, sizeof(priv->macaddr)); dev->ops = &g_cdcecm_netdev_ops; dev->quota[NETPKT_TX] = 1; dev->quota[NETPKT_RX] = 1; dev->rxtype = NETDEV_RX_WORK; dev->priority = LPWORK; netdev_lower_register(dev, NET_LL_ETHERNET); if (priv->intin) { /* Begin monitoring of message available events */ uinfo("Start notification monitoring\n"); ret = DRVR_ASYNCH(hport->drvr, priv->intin, (FAR uint8_t *)priv->notification, priv->maxintsize, usbhost_notification_callback, priv); if (ret < 0) { uerr("ERROR: DRVR_ASYNCH failed on intin: %d\n", ret); } } /* Check if we successfully initialized. We now have to be concerned * about asynchronous modification of crefs because the character * driver has been registered. */ if (ret >= 0) { nxmutex_lock(&priv->lock); DEBUGASSERT(priv->crefs >= 2); /* Handle a corner case where (1) open() has been called so the * reference count is > 2, but the device has been disconnected. * In this case, the class instance needs to persist until close() * is called. */ if (priv->crefs <= 2 && priv->disconnected) { /* We don't have to give the semaphore because it will be * destroyed when usb_destroy is called. */ ret = -ENODEV; } else { /* Ready for normal operation */ uinfo("Successfully initialized\n"); priv->crefs--; } nxmutex_unlock(&priv->lock); } return ret; } /**************************************************************************** * Name: usbhost_getle16 * * Description: * Get a (possibly unaligned) 16-bit little endian value. * * Input Parameters: * val - A pointer to the first byte of the little endian value. * * Returned Value: * A uint16_t representing the whole 16-bit integer value * ****************************************************************************/ static inline uint16_t usbhost_getle16(const uint8_t *val) { return (uint16_t)val[1] << 8 | (uint16_t)val[0]; } /**************************************************************************** * Name: usbhost_putle16 * * Description: * Put a (possibly unaligned) 16-bit little endian value. * * Input Parameters: * dest - A pointer to the first byte to save the little endian value. * val - The 16-bit value to be saved. * * Returned Value: * None * ****************************************************************************/ static void usbhost_putle16(uint8_t *dest, uint16_t val) { dest[0] = val & 0xff; /* Little endian means LS byte first in byte stream */ dest[1] = val >> 8; } /**************************************************************************** * Name: usbhost_getle32 * * Description: * Get a (possibly unaligned) 32-bit little endian value. * * Input Parameters: * dest - A pointer to the first byte to save the big endian value. * val - The 32-bit value to be saved. * * Returned Value: * None * ****************************************************************************/ static inline uint32_t usbhost_getle32(const uint8_t *val) { /* Little endian means LS halfword first in byte stream */ return (uint32_t)usbhost_getle16(&val[2]) << 16 | (uint32_t)usbhost_getle16(val); } /**************************************************************************** * Name: usbhost_alloc_buffers * * Description: * Allocate transfer buffer memory. * * Input Parameters: * priv - A reference to the class instance. * * Returned Value: * On success, zero (OK) is returned. On failure, an negated errno value * is returned to indicate the nature of the failure. * ****************************************************************************/ static int usbhost_alloc_buffers(FAR struct usbhost_cdcecm_s *priv) { FAR struct usbhost_hubport_s *hport; size_t maxlen; int ret; DEBUGASSERT(priv != NULL && priv->usbclass.hport != NULL && priv->ctrlreq == NULL); hport = priv->usbclass.hport; /* Allocate memory for control requests */ ret = DRVR_ALLOC(hport->drvr, (FAR uint8_t **)&priv->ctrlreq, &maxlen); if (ret < 0) { uerr("ERROR: DRVR_ALLOC of ctrlreq failed: %d\n", ret); goto errout; } DEBUGASSERT(maxlen >= sizeof(struct usb_ctrlreq_s)); /* Allocate buffer for interrupt IN notifications */ ret = DRVR_IOALLOC(hport->drvr, &priv->notification, priv->maxintsize); if (ret < 0) { uerr("ERROR: DRVR_IOALLOC of notification buf failed: %d (%d bytes)\n", ret, priv->maxintsize); goto errout; } ret = DRVR_IOALLOC(hport->drvr, &priv->bulkinbuf, CONFIG_USBHOST_CDCECM_RXBUFSIZE); if (ret < 0) { uerr("ERROR: DRVR_IOALLOC of net rx buf failed: %d (%d bytes)\n", ret, CONFIG_USBHOST_CDCECM_RXBUFSIZE); goto errout; } ret = DRVR_IOALLOC(hport->drvr, &priv->bulkoutbuf, CONFIG_USBHOST_CDCECM_TXBUFSIZE); if (ret < 0) { uerr("ERROR: DRVR_IOALLOC of net tx buf failed: %d (%d bytes)\n", ret, CONFIG_USBHOST_CDCECM_TXBUFSIZE); goto errout; } return OK; errout: usbhost_free_buffers(priv); return ret; } /**************************************************************************** * Name: usbhost_free_buffers * * Description: * Free transfer buffer memory. * * Input Parameters: * priv - A reference to the class instance. * * Returned Value: * None * ****************************************************************************/ static void usbhost_free_buffers(FAR struct usbhost_cdcecm_s *priv) { FAR struct usbhost_hubport_s *hport; DEBUGASSERT(priv != NULL && priv->usbclass.hport != NULL); hport = priv->usbclass.hport; if (priv->ctrlreq) { (void)DRVR_FREE(hport->drvr, priv->ctrlreq); } if (priv->notification) { (void)DRVR_IOFREE(hport->drvr, priv->notification); } if (priv->bulkinbuf) { (void)DRVR_IOFREE(hport->drvr, priv->bulkinbuf); } if (priv->bulkoutbuf) { (void)DRVR_IOFREE(hport->drvr, priv->bulkoutbuf); } priv->ctrlreq = NULL; priv->notification = NULL; priv->bulkinbuf = NULL; priv->bulkoutbuf = NULL; } /**************************************************************************** * struct usbhost_registry_s methods ****************************************************************************/ /**************************************************************************** * Name: usbhost_create * * Description: * This function implements the create() method of struct * usbhost_registry_s. * The create() method is a callback into the class implementation. It is * used to (1) create a new instance of the USB host class state and to (2) * bind a USB host driver "session" to the class instance. Use of this * create() method will support environments where there may be multiple * USB ports and multiple USB devices simultaneously connected. * * Input Parameters: * hport - The hub hat manages the new class instance. * id - In the case where the device supports multiple base classes, * subclasses, or protocols, this specifies which to configure for. * * Returned Value: * On success, this function will return a non-NULL instance of struct * usbhost_class_s that can be used by the USB host driver to communicate * with the USB host class. NULL is returned on failure; this function * will fail only if the hport input parameter is NULL or if there are * insufficient resources to create another USB host class instance. * ****************************************************************************/ static FAR struct usbhost_class_s *usbhost_create(FAR struct usbhost_hubport_s *hport, FAR const struct usbhost_id_s *id) { FAR struct usbhost_cdcecm_s *priv; /* Allocate a USB host class instance */ priv = usbhost_allocclass(); if (priv) { /* Initialize the allocated storage class instance */ memset(priv, 0, sizeof(struct usbhost_cdcecm_s)); /* Initialize class method function pointers */ priv->usbclass.hport = hport; priv->usbclass.connect = usbhost_connect; priv->usbclass.disconnected = usbhost_disconnected; /* The initial reference count is 1... One reference is held by * the driver. */ priv->crefs = 1; /* Initialize mutex (this works in the interrupt context) */ nxmutex_init(&priv->lock); /* Return the instance of the USB class driver */ return &priv->usbclass; } return NULL; } /**************************************************************************** * struct usbhost_class_s methods ****************************************************************************/ /**************************************************************************** * Name: usbhost_connect * * Description: * This function implements the connect() method of struct * usbhost_class_s. This method is a callback into the class * implementation. It is used to provide the device's configuration * descriptor to the class so that the class may initialize properly * * Input Parameters: * usbclass - The USB host class entry previously obtained from a call to * create(). * configdesc - A pointer to a uint8_t buffer container the configuration * descriptor. * desclen - The length in bytes of the configuration descriptor. * * Returned Value: * On success, zero (OK) is returned. On a failure, a negated errno value * is returned indicating the nature of the failure * * NOTE that the class instance remains valid upon return with a failure. * It is the responsibility of the higher level enumeration logic to call * CLASS_DISCONNECTED to free up the class driver resources. * * Assumptions: * - This function will *not* be called from an interrupt handler. * - If this function returns an error, the USB host controller driver * must call to DISCONNECTED method to recover from the error * ****************************************************************************/ static int usbhost_connect(FAR struct usbhost_class_s *usbclass, FAR const uint8_t *configdesc, int desclen) { FAR struct usbhost_cdcecm_s *priv = (FAR struct usbhost_cdcecm_s *) usbclass; int ret; DEBUGASSERT(priv != NULL && configdesc != NULL && desclen >= sizeof(struct usb_cfgdesc_s)); /* Parse the configuration descriptor to get the endpoints */ ret = usbhost_cfgdesc(priv, configdesc, desclen); if (ret < 0) { uerr("ERROR: usbhost_cfgdesc() failed: %d\n", ret); } else { /* Now configure the device and register the NuttX driver */ ret = usbhost_devinit(priv); if (ret < 0) { uerr("ERROR: usbhost_devinit() failed: %d\n", ret); } } return ret; } /**************************************************************************** * Name: usbhost_disconnected * * Description: * This function implements the disconnected() method of struct * usbhost_class_s. This method is a callback into the class * implementation. It is used to inform the class that the USB device has * been disconnected. * * Input Parameters: * usbclass - The USB host class entry previously obtained from a call to * create(). * * Returned Value: * On success, zero (OK) is returned. On a failure, a negated errno value * is returned indicating the nature of the failure * * Assumptions: * This function may be called from an interrupt handler. * ****************************************************************************/ static int usbhost_disconnected(struct usbhost_class_s *usbclass) { FAR struct usbhost_cdcecm_s *priv = (FAR struct usbhost_cdcecm_s *) usbclass; irqstate_t flags; DEBUGASSERT(priv != NULL); /* Set an indication to any users of the device that the device is no * longer available. */ flags = enter_critical_section(); priv->disconnected = true; /* Now check the number of references on the class instance. If it is one, * then we can free the class instance now. Otherwise, we will have to * wait until the holders of the references free them by closing the * block driver. */ uinfo("crefs: %d\n", priv->crefs); if (priv->crefs == 1) { /* Destroy the class instance. If we are executing from an interrupt * handler, then defer the destruction to the worker thread. * Otherwise, destroy the instance now. */ if (up_interrupt_context()) { /* Destroy the instance on the worker thread. */ uinfo("Queuing destruction: worker %p->%p\n", priv->destroywork.worker, usbhost_destroy); DEBUGASSERT(priv->destroywork.worker == NULL); work_queue(LPWORK, &priv->destroywork, usbhost_destroy, priv, 0); } else { /* Do the work now */ usbhost_destroy(priv); } } leave_critical_section(flags); return OK; } /**************************************************************************** * Name: cdcecm_net_transmit * * Description: * Lowerhalf transmit callback. Copies packet data to USB bulk OUT buffer * and performs a blocking USB transfer. * * Input Parameters: * dev - Reference to the lowerhalf driver structure * pkt - The packet to send (driver takes ownership and must free) * * Returned Value: * OK on success; a negated errno on failure * ****************************************************************************/ static int cdcecm_net_transmit(FAR struct netdev_lowerhalf_s *dev, FAR netpkt_t *pkt) { FAR struct usbhost_cdcecm_s *priv; FAR struct usbhost_hubport_s *hport; unsigned int datalen; ssize_t ret; priv = container_of(dev, struct usbhost_cdcecm_s, dev); hport = priv->usbclass.hport; datalen = netpkt_getdatalen(dev, pkt); uinfo("transmit packet: %u bytes\n", datalen); if (datalen > CONFIG_USBHOST_CDCECM_TXBUFSIZE) { netpkt_free(dev, pkt, NETPKT_TX); return -EMSGSIZE; } /* Copy packet data to USB bulk out buffer. * ECM sends raw Ethernet frames - no additional framing needed. */ ret = netpkt_copyout(dev, priv->bulkoutbuf, pkt, datalen, 0); netpkt_free(dev, pkt, NETPKT_TX); if (ret < 0) { return ret; } cdcecm_print_packet("ECM TX Packet:", priv->bulkoutbuf, datalen); ret = DRVR_TRANSFER(hport->drvr, priv->bulkout, priv->bulkoutbuf, datalen); if (ret < 0) { uerr("ERROR: DRVR_TRANSFER failed: %zd\n", ret); return ret; } netdev_lower_txdone(dev); return OK; } /**************************************************************************** * Name: cdcecm_net_receive * * Description: * Lowerhalf receive callback. Dequeues a received packet from the RX * queue. Called by upper half after netdev_lower_rxready() notification. * * Input Parameters: * dev - Reference to the lowerhalf driver structure * * Returned Value: * A netpkt containing the received packet, or NULL if no more packets. * ****************************************************************************/ static FAR netpkt_t *cdcecm_net_receive(FAR struct netdev_lowerhalf_s *dev) { FAR struct usbhost_cdcecm_s *priv; priv = container_of(dev, struct usbhost_cdcecm_s, dev); return netpkt_remove_queue(&priv->rx_queue); } /**************************************************************************** * Name: cdcecm_net_ioctl * * Description: * Lowerhalf ioctl callback. * ****************************************************************************/ #ifdef CONFIG_NETDEV_IOCTL static int cdcecm_net_ioctl(FAR struct netdev_lowerhalf_s *dev, int cmd, unsigned long arg) { return -ENOTTY; } #endif /**************************************************************************** * Name: cdcecm_net_reclaim * * Description: * Lowerhalf reclaim callback. TX is synchronous via DRVR_TRANSFER * so there are no queued TX packets to reclaim. * ****************************************************************************/ static void cdcecm_net_reclaim(FAR struct netdev_lowerhalf_s *dev) { } /**************************************************************************** * Name: cdcecm_ifup * * Description: * NuttX Callback: Bring up the ECM interface * * Input Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static int cdcecm_net_ifup(struct netdev_lowerhalf_s *dev) { FAR struct usbhost_cdcecm_s *priv; priv = container_of(dev, struct usbhost_cdcecm_s, dev); nxmutex_lock(&priv->lock); struct usbhost_hubport_s *hport = priv->usbclass.hport; int ret; /* Activate the data interface by setting alternate setting 1 */ ret = usbhost_setinterface(priv, priv->dataif, 1); if (ret < 0) { uerr("Failed to activate data interface: %d\n", ret); nxmutex_unlock(&priv->lock); return ret; } /* Set the packet filter */ ret = usbhost_set_packet_filter(priv, ECM_DEFAULT_PACKET_FILTER); if (ret < 0) { uwarn("Failed to set packet filter: %d (continuing)\n", ret); /* Continue anyway - some devices don't support this */ } /* Start RX asynch on bulk in */ if (priv->bulkin) { ret = DRVR_ASYNCH(hport->drvr, priv->bulkin, priv->bulkinbuf, CONFIG_USBHOST_CDCECM_RXBUFSIZE, usbhost_bulkin_callback, priv); if (ret < 0) { uerr("ERROR: DRVR_ASYNCH failed on bulkin: %d\n", ret); } } priv->bifup = true; nxmutex_unlock(&priv->lock); return OK; } /**************************************************************************** * Name: cdcecm_ifdown * * Description: * NuttX Callback: Stop the interface. * * Input Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static int cdcecm_net_ifdown(struct netdev_lowerhalf_s *dev) { struct usbhost_cdcecm_s *priv; priv = container_of(dev, struct usbhost_cdcecm_s, dev); nxmutex_lock(&priv->lock); /* Deactivate the data interface */ usbhost_setinterface(priv, priv->dataif, 0); priv->bifup = false; nxmutex_unlock(&priv->lock); return OK; } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: usbhost_cdcecm_initialize * * Description: * Initialize the USB class driver. This function should be called * be platform-specific code in order to initialize and register support * for the USB host class device. * * Input Parameters: * None * * Returned Value: * On success this function will return zero (OK); A negated errno value * will be returned on failure. * ****************************************************************************/ int usbhost_cdcecm_initialize(void) { /* Perform any one-time initialization of the class implementation */ /* Advertise our availability to support CDC ECM devices */ return usbhost_registerclass(&g_cdcecm); }