/**************************************************************************** * drivers/usbhost/usbhost_cdcmbim.c * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define CDCMBIM_NETBUF_SIZE 8192 /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* put in cdc.h */ #define USB_CDC_SEND_ENCAPSULATED_COMMAND 0x00 #define USB_CDC_GET_ENCAPSULATED_RESPONSE 0x01 #define USB_CDC_GET_NTB_PARAMETERS 0x80 #define USB_CDC_SET_NTB_INPUT_SIZE 0x86 #define USB_CDC_SET_NTB_FORMAT 0x83 #define USB_CDC_SET_CRC_MODE 0x8a #define USB_CDC_SET_MAX_DATAGRAM_SIZE 0x88 #define USB_CDC_NCM_NTB16_SUPPORTED (1 << 0) #define USB_CDC_NCM_NTB32_SUPPORTED (1 << 1) #define USB_CDC_NCM_NTB16_FORMAT 0x00 #define USB_CDC_NCM_NTB32_FORMAT 0x01 #define USB_CDC_NCM_DATAGRAM_FORMAT_CRC 0x30 #define USB_CDC_NCM_DATAGRAM_FORMAT_NOCRC 0x31 #define USB_CDC_NCM_CRC_NOT_APPENDED 0x00 #define USB_CDC_NCM_CRC_APPENDED 0x01 #define USB_CDC_NCM_NTH16_SIGNATURE 0x484D434E /* 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_CDCMBIM_NTDELAY # define USBHOST_CDCMBIM_NTDELAY MSEC2TICK(CONFIG_USBHOST_CDCMBIM_NTDELAY) #else # define USBHOST_CDCMBIM_NTDELAY MSEC2TICK(200) #endif #ifndef CONFIG_USBHOST_CDCMBIM_NPOLLWAITERS # define CONFIG_USBHOST_CDCMBIM_NPOLLWAITERS 1 #endif /* Driver support ***********************************************************/ /* This format is used to construct the /dev/cdc-wdm[n] device driver path. * It defined here so that it will be used consistently in all places. */ #define DEV_FORMAT "/dev/cdc-wdm%d" #define DEV_NAMELEN 16 /* 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_ALLFOUND 0x1f #define USBHOST_MAX_CREFS 0x7fff /**************************************************************************** * Private Types ****************************************************************************/ struct usb_cdc_ncm_nth16_s { uint8_t signature[4]; uint8_t length[2]; uint8_t sequence[2]; uint8_t block_length[2]; uint8_t ndp_index[2]; }; struct usb_cdc_ncm_dpe16_s { uint8_t index[2]; uint8_t length[2]; }; struct usb_cdc_ncm_ndp16_s { uint8_t signature[4]; uint8_t length[2]; uint8_t next_ndp_index[2]; struct usb_cdc_ncm_dpe16_s dpe16[0]; }; struct usb_cdc_ncm_ntb_params_s { uint8_t length[2]; uint8_t ntb_formats_supported[2]; uint8_t ntb_in_max_size[4]; uint8_t ndp_in_divisor[2]; uint8_t ndp_in_payload_remainder[2]; uint8_t ndp_in_alignment[2]; uint8_t reserved[2]; uint8_t ntb_out_max_size[4]; uint8_t ndp_out_divisor[2]; uint8_t ndp_out_payload_remainder[2]; uint8_t ndp_out_alignment[2]; uint8_t ntb_out_max_datagrams[2]; }; struct usb_csifdesc_s { uint8_t len; uint8_t type; uint8_t subtype; }; struct usb_mbim_desc_s { uint8_t len; uint8_t type; uint8_t subtype; uint8_t mbim_version[2]; uint8_t max_ctrl_message[2]; uint8_t num_filters; uint8_t max_filter_size; uint8_t max_segment_size[2]; uint8_t network_capabilities; }; /* This structure contains the internal, private state of the USB host class * driver. */ struct usbhost_cdcmbim_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 */ uint8_t minor; /* Minor number identifying the /dev/cdc-wdm[n] device */ 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 comm_rxwork; /* Communication interface RX work */ struct work_s bulk_rxwork; struct work_s txpollwork; struct work_s destroywork; int16_t nnbytes; /* Number of bytes received in notification */ int16_t bulkinbytes; uint16_t comm_rxlen; /* Number of bytes in the RX buffer */ uint16_t comm_rxmsgs; /* Number of messages available to be read */ uint16_t comm_rxpos; /* Read position for input buffer */ uint16_t maxctrlsize; /* Maximum size of a ctrl request */ uint16_t maxintsize; /* Maximum size of interrupt IN packet */ uint32_t maxntbin; /* Maximum size of NTB IN message */ uint32_t maxntbout; /* Maximum size of NTB OUT message */ FAR uint8_t *ctrlreq; /* Allocated ctrl request structure */ FAR uint8_t *data_txbuf; /* Allocated TX buffer for network datagrams */ FAR uint8_t *data_rxbuf; /* Allocated RX buffer for network datagrams */ FAR uint8_t *comm_rxbuf; /* Allocated RX buffer comm IN messages */ FAR uint8_t *notification; /* Allocated RX buffer for async notifications */ FAR uint8_t *rxnetbuf; /* Allocated RX buffer for NTB frames */ FAR uint8_t *txnetbuf; /* Allocated TX buffer for NTB frames */ 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 */ uint16_t ntbseq; /* NTB sequence number */ FAR struct pollfd *fds[CONFIG_USBHOST_CDCMBIM_NPOLLWAITERS]; /* Network device members */ bool bifup; /* true:ifup false:ifdown */ struct net_driver_s netdev; /* Interface understood by the network */ uint16_t txpktbuf[(MAX_NETDEV_PKTSIZE + 1) / 2]; }; /**************************************************************************** * Private Function Prototypes ****************************************************************************/ /* Memory allocation services */ static inline FAR struct usbhost_cdcmbim_s *usbhost_allocclass(void); static inline void usbhost_freeclass(FAR struct usbhost_cdcmbim_s *usbclass); /* Device name management */ static int usbhost_allocdevno(FAR struct usbhost_cdcmbim_s *priv); static void usbhost_freedevno(FAR struct usbhost_cdcmbim_s *priv); static inline void usbhost_mkdevname(FAR struct usbhost_cdcmbim_s *priv, FAR char *devname); /* 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_rxdata_work(FAR void *arg); static void usbhost_bulkin_work(FAR void *arg); static void usbhost_bulkin_callback(FAR void *arg, ssize_t nbytes); static void usbhost_destroy(FAR void *arg); /* Helpers for usbhost_connect() */ static int usbhost_cfgdesc(FAR struct usbhost_cdcmbim_s *priv, FAR const uint8_t *configdesc, int desclen); static inline int usbhost_devinit(FAR struct usbhost_cdcmbim_s *priv); /* (Little Endian) Data helpers */ static inline uint16_t usbhost_getle16(FAR const uint8_t *val); static inline void usbhost_putle16(FAR uint8_t *dest, uint16_t val); static inline uint32_t usbhost_getle32(FAR const FAR uint8_t *val); static void usbhost_putle32(FAR uint8_t *dest, uint32_t val); /* Buffer memory management */ static int usbhost_alloc_buffers(FAR struct usbhost_cdcmbim_s *priv); static void usbhost_free_buffers(FAR struct usbhost_cdcmbim_s *priv); /* struct usbhost_registry_s methods */ static FAR 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); /* Control interface driver methods */ static ssize_t cdcwdm_read(FAR struct file *filep, FAR char *buffer, size_t buflen); static ssize_t cdcwdm_write(FAR struct file *filep, FAR const char *buffer, size_t buflen); static int cdcwdm_poll(FAR struct file *filep, FAR struct pollfd *fds, bool setup); /* NuttX network callback functions */ static int cdcmbim_ifup(FAR struct net_driver_s *dev); static int cdcmbim_ifdown(FAR struct net_driver_s *dev); static int cdcmbim_txavail(FAR struct net_driver_s *dev); /* Network support functions */ static void cdcmbim_receive(FAR struct usbhost_cdcmbim_s *priv, FAR uint8_t *buf, size_t len); static int cdcmbim_txpoll(FAR struct net_driver_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_id = { USB_CLASS_CDC, /* base */ CDC_SUBCLASS_MBIM, /* subclass */ 0, /* proto */ 0, /* vid */ 0 /* pid */ }; /* This is the USB host storage class's registry entry */ static struct usbhost_registry_s g_cdcmbim = { NULL, /* flink */ usbhost_create, /* create */ 1, /* nids */ &g_id /* id[] */ }; /* File operations for control channel */ static const struct file_operations g_cdcwdm_fops = { NULL, /* open */ NULL, /* close */ cdcwdm_read, /* read */ cdcwdm_write, /* write */ NULL, /* seek */ NULL, /* ioctl */ NULL, /* mmap */ NULL, /* truncate */ cdcwdm_poll /* poll */ }; /* This is a bitmap that is used to allocate device names /dev/cdc-wdm[n]. */ static uint32_t g_devinuse; /**************************************************************************** * Private Functions ****************************************************************************/ static int usbhost_ctrl_cmd(FAR struct usbhost_cdcmbim_s *priv, uint8_t type, uint8_t req, uint16_t value, uint16_t iface, FAR uint8_t *payload, uint16_t len) { FAR struct usbhost_hubport_s *hport; FAR struct usb_ctrlreq_s *ctrlreq; int ret; hport = priv->usbclass.hport; ctrlreq = (FAR struct usb_ctrlreq_s *)priv->ctrlreq; ctrlreq->type = type; ctrlreq->req = req; usbhost_putle16(ctrlreq->value, value); usbhost_putle16(ctrlreq->index, iface); 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; } static ssize_t usbhost_readmessage(FAR struct usbhost_cdcmbim_s *priv, FAR char *buffer, size_t buflen) { irqstate_t flags; ssize_t ret = -EAGAIN; flags = enter_critical_section(); if (priv->comm_rxlen > 0) { if (buflen > priv->comm_rxlen) { buflen = priv->comm_rxlen; } ret = buflen; memcpy(buffer, priv->comm_rxbuf + priv->comm_rxpos, buflen); priv->comm_rxlen -= buflen; priv->comm_rxpos += buflen; if (priv->comm_rxlen == 0) { priv->comm_rxpos = 0; } } leave_critical_section(flags); return ret; } static ssize_t cdcwdm_read(FAR struct file *filep, FAR char *buffer, size_t buflen) { FAR struct inode *inode; FAR struct usbhost_cdcmbim_s *priv; ssize_t ret; inode = filep->f_inode; priv = inode->i_private; nxmutex_lock(&priv->lock); if (priv->disconnected) { ret = -ENODEV; goto errout; } ret = usbhost_readmessage(priv, buffer, buflen); if (ret < 0) { if (filep->f_oflags & O_NONBLOCK) { ret = -EAGAIN; goto errout; } /* wait for a message * TODO blocking read */ ret = 0; goto errout; } /* If this message has been completely read and there are more * messages available, read the next message into the input buffer. */ if (priv->comm_rxlen == 0 && priv->comm_rxmsgs > 0) { uinfo("Reading next message\n"); if (work_available(&priv->comm_rxwork)) { work_queue(LPWORK, &priv->comm_rxwork, (worker_t)usbhost_rxdata_work, priv, 0); } } errout: nxmutex_unlock(&priv->lock); return ret; } static ssize_t cdcwdm_write(FAR struct file *filep, FAR const char *buffer, size_t buflen) { FAR struct inode *inode; FAR struct usbhost_cdcmbim_s *priv; int ret; inode = filep->f_inode; priv = inode->i_private; if (priv->disconnected) { return -ENODEV; } if (buflen > priv->maxctrlsize) { buflen = priv->maxctrlsize; } /* Make sure that we have exclusive access to the private data * structure. There may now be other tasks with the character driver * open and actively trying to interact with the class driver. */ nxmutex_lock(&priv->lock); ret = usbhost_ctrl_cmd(priv, USB_REQ_DIR_OUT | USB_REQ_TYPE_CLASS | USB_REQ_RECIPIENT_INTERFACE, USB_CDC_SEND_ENCAPSULATED_COMMAND, 0, priv->ctrlif, (FAR uint8_t *)buffer, buflen); nxmutex_unlock(&priv->lock); if (ret) { return ret; } uinfo("wrote %u bytes\n", buflen); return buflen; } /**************************************************************************** * Name: usbhost_poll * * Description: * Standard character driver poll method. * ****************************************************************************/ static int cdcwdm_poll(FAR struct file *filep, FAR struct pollfd *fds, bool setup) { FAR struct inode *inode; FAR struct usbhost_cdcmbim_s *priv; int ret = OK; int i; DEBUGASSERT(fds); inode = filep->f_inode; priv = inode->i_private; /* Make sure that we have exclusive access to the private data structure */ DEBUGASSERT(priv); nxmutex_lock(&priv->lock); if (priv->disconnected) { ret = -ENODEV; } else if (setup) { /* This is a request to set up the poll. Find an available slot for * the poll structure reference */ for (i = 0; i < CONFIG_USBHOST_CDCMBIM_NPOLLWAITERS; i++) { /* Find an available slot */ if (!priv->fds[i]) { /* Bind the poll structure and this slot */ priv->fds[i] = fds; fds->priv = &priv->fds[i]; break; } } if (i >= CONFIG_USBHOST_CDCMBIM_NPOLLWAITERS) { fds->priv = NULL; ret = -EBUSY; goto errout; } /* Should we immediately notify on any of the requested events? Notify * the POLLIN event if there is a buffered message. */ if (priv->comm_rxlen > 0) { poll_notify(&fds, 1, POLLIN); } } else { /* This is a request to tear down the poll. */ FAR struct pollfd **slot = (FAR struct pollfd **)fds->priv; DEBUGASSERT(slot); /* Remove all memory of the poll setup */ *slot = NULL; fds->priv = NULL; } errout: nxmutex_unlock(&priv->lock); 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_cdcmbim_s *usbhost_allocclass(void) { FAR struct usbhost_cdcmbim_s *priv; DEBUGASSERT(!up_interrupt_context()); priv = kmm_malloc(sizeof(struct usbhost_cdcmbim_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_cdcmbim_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); } /**************************************************************************** * Name: Device name management * * Description: * Some tiny functions to coordinate management of device names. * ****************************************************************************/ static int usbhost_allocdevno(FAR struct usbhost_cdcmbim_s *priv) { irqstate_t flags; int devno; flags = enter_critical_section(); for (devno = 0; devno < 32; devno++) { uint32_t bitno = 1 << devno; if ((g_devinuse & bitno) == 0) { g_devinuse |= bitno; priv->minor = devno; leave_critical_section(flags); return OK; } } leave_critical_section(flags); return -EMFILE; } static void usbhost_freedevno(FAR struct usbhost_cdcmbim_s *priv) { int devno = priv->minor; if (devno >= 0 && devno < 26) { irqstate_t flags = enter_critical_section(); g_devinuse &= ~(1 << devno); leave_critical_section(flags); } } static inline void usbhost_mkdevname(FAR struct usbhost_cdcmbim_s *priv, FAR char *devname) { snprintf(devname, DEV_NAMELEN, DEV_FORMAT, priv->minor); } static void usbhost_bulkin_callback(FAR void *arg, ssize_t nbytes) { FAR struct usbhost_cdcmbim_s *priv = (FAR struct usbhost_cdcmbim_s *)arg; uint32_t delay = 0; DEBUGASSERT(priv); 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) { FAR struct usbhost_cdcmbim_s *priv; FAR struct usbhost_hubport_s *hport; FAR struct usb_cdc_ncm_nth16_s *nth; uint16_t ndpoffset; uint16_t dgram_len; uint16_t dgram_off; uint16_t block_len; priv = (FAR struct usbhost_cdcmbim_s *)arg; DEBUGASSERT(priv); hport = priv->usbclass.hport; DEBUGASSERT(hport); if (priv->disconnected || !priv->bifup) { return; } nxmutex_lock(&priv->lock); if (priv->bulkinbytes < (int16_t)(sizeof(struct usb_cdc_ncm_nth16_s) + sizeof(struct usb_cdc_ncm_ndp16_s))) { goto out; } /* Parse the NTB header */ nth = (FAR struct usb_cdc_ncm_nth16_s *)priv->rxnetbuf; if (usbhost_getle32(nth->signature) != USB_CDC_NCM_NTH16_SIGNATURE) { uerr("Invalid NTH signature\n"); goto out; } block_len = usbhost_getle16(nth->block_length); if (block_len > priv->bulkinbytes) { uerr("Block length larger than rx buffer\n"); goto out; } ndpoffset = usbhost_getle16(nth->ndp_index); if (ndpoffset > priv->bulkinbytes) { uerr("NDP offset too far %u > %u\n", ndpoffset, priv->bulkinbytes); goto out; } /* Parse each NDP */ do { FAR struct usb_cdc_ncm_dpe16_s *dpe; FAR struct usb_cdc_ncm_ndp16_s *ndp = (FAR struct usb_cdc_ncm_ndp16_s *)(priv->rxnetbuf + ndpoffset); ndpoffset = usbhost_getle16(ndp->next_ndp_index); /* Parse each DPE */ for (dpe = ndp->dpe16; usbhost_getle16(dpe->index); dpe++) { dgram_off = usbhost_getle16(dpe->index); dgram_len = usbhost_getle16(dpe->length); if (dgram_off + dgram_len <= priv->bulkinbytes) { cdcmbim_receive(priv, priv->rxnetbuf + dgram_off, dgram_len); } } } while (ndpoffset); out: DRVR_ASYNCH(hport->drvr, priv->bulkin, (FAR uint8_t *)priv->rxnetbuf, CDCMBIM_NETBUF_SIZE, usbhost_bulkin_callback, priv); nxmutex_unlock(&priv->lock); } /**************************************************************************** * Name: usbhost_rxdata_work * * Description: * Read an available comm message into the RX buffer * * Input Parameters: * arg - Driver private data * * Returned Value: * None * * Assumptions: * None * ****************************************************************************/ static void usbhost_rxdata_work(FAR void *arg) { /* Would be nice if CTRLIN would return how many bytes it read... */ struct mbim_header_s { uint8_t type[4]; uint8_t len[4]; }; FAR struct usbhost_cdcmbim_s *priv; FAR struct mbim_header_s *hdr; uint32_t len; int ret; priv = (FAR struct usbhost_cdcmbim_s *)arg; DEBUGASSERT(priv); /* Are we still connected? */ if (priv->disconnected) { return; } nxmutex_lock(&priv->lock); ret = usbhost_ctrl_cmd(priv, USB_REQ_DIR_IN | USB_REQ_TYPE_CLASS | USB_REQ_RECIPIENT_INTERFACE, USB_CDC_GET_ENCAPSULATED_RESPONSE, 0, priv->ctrlif, priv->comm_rxbuf, priv->maxctrlsize); if (ret) { uerr("Failed to read message: %d\n", ret); goto errout; } hdr = (FAR struct mbim_header_s *)priv->comm_rxbuf; len = usbhost_getle32(hdr->len); if (len > priv->maxctrlsize) { uerr("Read invalid MBIM packet\n"); goto errout; } uinfo("Read MBIM message %u bytes\n", len); priv->comm_rxlen = len; priv->comm_rxmsgs--; /* Notify any poll waiters we have data */ poll_notify(priv->fds, CONFIG_USBHOST_CDCMBIM_NPOLLWAITERS, POLLIN); errout: nxmutex_unlock(&priv->lock); } /**************************************************************************** * 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 * * Assumptions: * Probably called from an interrupt handler. * ****************************************************************************/ static void usbhost_notification_work(FAR void *arg) { FAR struct usbhost_cdcmbim_s *priv; FAR struct usbhost_hubport_s *hport; FAR struct cdc_notification_s *inmsg; int ret; priv = (FAR struct usbhost_cdcmbim_s *)arg; DEBUGASSERT(priv); 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; /* We care only about the ResponseAvailable notification */ if ((inmsg->type == (USB_REQ_DIR_IN | USB_REQ_TYPE_CLASS | USB_REQ_RECIPIENT_INTERFACE)) && (inmsg->notification == ACM_RESPONSE_AVAILABLE)) { priv->comm_rxmsgs++; /* If this is the only message available, read it */ if (priv->comm_rxmsgs == 1) { if (work_available(&priv->comm_rxwork)) { work_queue(LPWORK, &priv->comm_rxwork, usbhost_rxdata_work, priv, 0); } } } } /* Setup to receive the next notification */ ret = DRVR_ASYNCH(hport->drvr, priv->intin, (FAR uint8_t *)priv->notification, SIZEOF_NOTIFICATION_S(0), usbhost_notification_callback, priv); if (ret < 0) { uerr("ERROR: DRVR_ASYNCH failed: %d\n", ret); } } } /**************************************************************************** * Name: usbhost_notification_callback * * Description: * Handle receipt of Response Available from the CDC/MBIM 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_cdcmbim_s *priv = (FAR struct usbhost_cdcmbim_s *)arg; uint32_t delay = 0; DEBUGASSERT(priv); /* 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_CDCMBIM_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_cdcmbim_s *priv = (FAR struct usbhost_cdcmbim_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 driver */ /* Release the device name used by this connection */ usbhost_freedevno(priv); /* 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; /* Destroy the semaphores */ /* 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_cdcmbim_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; struct usbhost_epdesc_s bindesc; struct usbhost_epdesc_s boutdesc; 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; /* MBIM functional descriptor */ if (csdesc->subtype == CDC_DSUBTYPE_MBIM) { FAR struct usb_mbim_desc_s *mbim = (FAR struct usb_mbim_desc_s *)desc; priv->maxctrlsize = usbhost_getle16(mbim->max_ctrl_message); uinfo("MBIM max control size: %u\n", priv->maxctrlsize); uinfo("MBIM max segment size: %u\n", usbhost_getle16(mbim->max_segment_size)); } } 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_MBIM && 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_MBIMNTB) { 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 BIN:%s BOUT:%s\n", (found & USBHOST_CTRLIFFOUND) != 0 ? "YES" : "NO", (found & USBHOST_DATAIFFOUND) != 0 ? "YES" : "NO", (found & USBHOST_BINFOUND) != 0 ? "YES" : "NO", (found & USBHOST_BOUTFOUND) != 0 ? "YES" : "NO"); return -EINVAL; } /* 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_cdcmbim_s *priv, uint16_t iface, uint16_t setting) { return usbhost_ctrl_cmd(priv, USB_REQ_DIR_OUT | USB_REQ_RECIPIENT_INTERFACE, USB_REQ_SETINTERFACE, setting, iface, NULL, 0); } static int cdc_ncm_set_ntb_input_size(FAR struct usbhost_cdcmbim_s *priv, uint32_t size) { uint8_t buf[4]; usbhost_putle32(buf, size); return usbhost_ctrl_cmd(priv, USB_REQ_DIR_OUT | USB_REQ_TYPE_CLASS | USB_REQ_RECIPIENT_INTERFACE, USB_CDC_SET_NTB_INPUT_SIZE, 0, priv->ctrlif, buf, 4); } #if 0 static int cdc_ncm_set_max_dgram_size(FAR struct usbhost_cdcmbim_s *priv, uint16_t size) { uint8_t buf[2]; usbhost_putle16(buf, size); return usbhost_ctrl_cmd(priv, USB_REQ_DIR_OUT | USB_REQ_TYPE_CLASS | USB_REQ_RECIPIENT_INTERFACE, USB_CDC_SET_MAX_DATAGRAM_SIZE, 0, priv->ctrlif, buf, 2); } #endif static int cdc_ncm_read_parameters(FAR struct usbhost_cdcmbim_s *priv) { struct usb_cdc_ncm_ntb_params_s params; int ret; ret = usbhost_ctrl_cmd(priv, USB_REQ_DIR_IN | USB_REQ_TYPE_CLASS | USB_REQ_RECIPIENT_INTERFACE, USB_CDC_GET_NTB_PARAMETERS, 0, priv->ctrlif, (FAR uint8_t *)¶ms, sizeof(params)); if (ret == OK) { priv->maxntbin = usbhost_getle32(params.ntb_in_max_size); priv->maxntbout = usbhost_getle32(params.ntb_out_max_size); } return ret; } /**************************************************************************** * 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_cdcmbim_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; } priv->ntbseq = 0; /* Read NCM parameters */ ret = cdc_ncm_read_parameters(priv); if (ret) { uerr("ERROR: failed to read NCM parameters: %d\n", ret); } /* Set alternate setting 1 on data interface */ usbhost_setinterface(priv, priv->dataif, 1); /* Set NTB Input size to length of rx buffer */ ret = cdc_ncm_set_ntb_input_size(priv, CDCMBIM_NETBUF_SIZE); if (ret) { printf("set NTB input size failed: %d\n", ret); } #if 0 /* Set max datagram size to MTU */ ret = cdc_ncm_set_max_dgram_size(priv, 2048); if (ret) { printf("Failed to set max dgram size: %d\n", ret); } #endif /* Register the driver */ if (ret >= 0) { char devname[DEV_NAMELEN]; uinfo("Register character driver\n"); usbhost_mkdevname(priv, devname); ret = register_driver(devname, &g_cdcwdm_fops, 0666, priv); } 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, SIZEOF_NOTIFICATION_S(0), usbhost_notification_callback, priv); if (ret < 0) { uerr("ERROR: DRVR_ASYNCH failed on intin: %d\n", ret); } } /* Setup the network interface */ memset(&priv->netdev, 0, sizeof(struct net_driver_s)); priv->netdev.d_ifup = cdcmbim_ifup; priv->netdev.d_ifdown = cdcmbim_ifdown; priv->netdev.d_txavail = cdcmbim_txavail; priv->netdev.d_private = priv; /* Register the network device */ netdev_register(&priv->netdev, NET_LL_MBIM); /* 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(FAR 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(FAR 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(FAR 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_putle32 * * Description: * Put a (possibly unaligned) 32-bit little endian value. * * Input Parameters: * dest - A pointer to the first byte to save the little endian value. * val - The 32-bit value to be saved. * * Returned Value: * None * ****************************************************************************/ static void usbhost_putle32(FAR uint8_t *dest, uint32_t val) { /* Little endian means LS halfword first in byte stream */ usbhost_putle16(dest, (uint16_t)(val & 0xffff)); usbhost_putle16(dest + 2, (uint16_t)(val >> 16)); } /**************************************************************************** * 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_cdcmbim_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 receiving encapsulated data */ ret = DRVR_IOALLOC(hport->drvr, &priv->comm_rxbuf, priv->maxctrlsize); if (ret < 0) { uerr("ERROR: DRVR_IOALLOC of comm_rxbuf failed: %d (%d bytes)\n", ret, priv->maxctrlsize); goto errout; } /* 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->rxnetbuf, CDCMBIM_NETBUF_SIZE); if (ret < 0) { uerr("ERROR: DRVR_IOALLOC of net rx buf failed: %d (%d bytes)\n", ret, 2048); goto errout; } ret = DRVR_IOALLOC(hport->drvr, &priv->txnetbuf, 2048); if (ret < 0) { uerr("ERROR: DRVR_IOALLOC of net tx buf failed: %d (%d bytes)\n", ret, 2048); 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_cdcmbim_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->comm_rxbuf) { (void)DRVR_IOFREE(hport->drvr, priv->comm_rxbuf); } if (priv->notification) { (void)DRVR_IOFREE(hport->drvr, priv->notification); } if (priv->rxnetbuf) { (void)DRVR_IOFREE(hport->drvr, priv->rxnetbuf); } if (priv->txnetbuf) { (void)DRVR_IOFREE(hport->drvr, priv->txnetbuf); } priv->ctrlreq = NULL; priv->comm_rxbuf = NULL; priv->notification = NULL; priv->rxnetbuf = NULL; priv->txnetbuf = 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_cdcmbim_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_cdcmbim_s)); /* Assign a device number to this class instance */ if (usbhost_allocdevno(priv) == OK) { /* 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; } } /* An error occurred. Free the allocation and return NULL on all failures */ if (priv) { usbhost_freeclass(priv); } 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_cdcmbim_s *priv = (FAR struct usbhost_cdcmbim_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(FAR struct usbhost_class_s *usbclass) { FAR struct usbhost_cdcmbim_s *priv = (FAR struct usbhost_cdcmbim_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: cdcmbim_transmit * * Description: * Start hardware transmission. Called either from the txdone interrupt * handling or from watchdog based polling. * * Input Parameters: * priv - Reference to the driver state structure * * Returned Value: * OK on success; a negated errno on failure * * Assumptions: * The network is locked. * ****************************************************************************/ static int cdcmbim_transmit(FAR struct usbhost_cdcmbim_s *priv) { FAR struct usbhost_hubport_s *hport; FAR struct usb_cdc_ncm_nth16_s *nth; FAR struct usb_cdc_ncm_ndp16_s *ndp; FAR struct usb_cdc_ncm_dpe16_s *dpe; ssize_t ret; uint16_t len = 0; hport = priv->usbclass.hport; uinfo("transmit packet: %d bytes\n", priv->netdev.d_len); /* Increment statistics */ NETDEV_TXPACKETS(&priv->netdev); len = sizeof(struct usb_cdc_ncm_nth16_s); nth = (FAR struct usb_cdc_ncm_nth16_s *)priv->txnetbuf; /* Begin filling NTH */ usbhost_putle32(nth->signature, USB_CDC_NCM_NTH16_SIGNATURE); usbhost_putle16(nth->length, sizeof(struct usb_cdc_ncm_nth16_s)); usbhost_putle16(nth->sequence, priv->ntbseq++); /* Payload directly after NTH */ memcpy(priv->txnetbuf + len, priv->netdev.d_buf, priv->netdev.d_len); len += priv->netdev.d_len; /* NDP after payload */ ndp = (struct usb_cdc_ncm_ndp16_s *)(priv->txnetbuf + len); usbhost_putle16(ndp->next_ndp_index, 0); usbhost_putle32(ndp->signature, 0x00535049); usbhost_putle16(ndp->length, 16); /* NDP + (2 * DPE) */ /* Fill NDP and block info in NTH */ usbhost_putle16(nth->ndp_index, len); len += 16; usbhost_putle16(nth->block_length, len); /* Fill first DPE */ dpe = ndp->dpe16; usbhost_putle16(dpe->index, 0x0c); usbhost_putle16(dpe->length, priv->netdev.d_len); /* NULL DPE */ dpe++; usbhost_putle16(dpe->index, 0); usbhost_putle16(dpe->length, 0); ret = DRVR_TRANSFER(hport->drvr, priv->bulkout, priv->txnetbuf, len); if (ret < 0) { uerr("transfer returned error: %d\n", ret); return ret; } /* If frame is multiple of wMaxPacketSize we must send a ZLP */ if ((len % priv->bulkmxpacket) == 0) { ret = DRVR_TRANSFER(hport->drvr, priv->bulkout, priv->txnetbuf, 0); if (ret < 0) { uerr("ERROR: DRVR_TRANSFER for ZLP failed: %d\n", (int)ret); } } NETDEV_TXDONE(&priv->netdev); return OK; } /**************************************************************************** * Name: cdcmbim_receive * * Description: * Handle a received packet. * * Input Parameters: * priv - Reference to the driver state structure * * Returned Value: * OK on success; a negated errno on failure * ****************************************************************************/ static void cdcmbim_receive(FAR struct usbhost_cdcmbim_s *priv, FAR uint8_t *buf, size_t len) { uinfo("received packet: %d len\n", len); net_lock(); NETDEV_RXPACKETS(&priv->netdev); /* Any ACK or other response packet generated by the network stack * will always be shorter than the received packet, therefore it is * safe to pass the received frame buffer directly. */ priv->netdev.d_buf = buf; priv->netdev.d_len = len; switch (((FAR struct ipv4_hdr_s *)buf)->vhl & IP_VERSION_MASK) { #ifdef CONFIG_NET_IPv4 case IPv4_VERSION: NETDEV_RXIPV4(&priv->netdev); ipv4_input(&priv->netdev); if (priv->netdev.d_len > 0) { cdcmbim_transmit(priv); } break; #endif #ifdef CONFIG_NET_IPv6 case IPv6_VERSION: NETDEV_RXIPV6(&priv->netdev); ipv6_input(&priv->netdev); if (priv->dev.d_len > 0) { cdcmbim_transmit(priv); } break; #endif default: NETDEV_RXERRORS(dev); } net_unlock(); } /**************************************************************************** * Name: cdcmbim_txpoll * * Description: * The transmitter is available, check if the network 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 * * Input Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * OK on success; a negated errno on failure * * Assumptions: * The network is locked. * ****************************************************************************/ static int cdcmbim_txpoll(FAR struct net_driver_s *dev) { FAR struct usbhost_cdcmbim_s *priv = (FAR struct usbhost_cdcmbim_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. */ DEBUGASSERT(priv->netdev.d_buf == (FAR uint8_t *)priv->txpktbuf); nxmutex_lock(&priv->lock); /* Send the packet */ cdcmbim_transmit(priv); nxmutex_unlock(&priv->lock); return 0; } /**************************************************************************** * Name: cdcmbim_ifup * * Description: * NuttX Callback: Bring up the MBIM interface when an IP address is * provided * * Input Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static int cdcmbim_ifup(FAR struct net_driver_s *dev) { FAR struct usbhost_cdcmbim_s *priv = (FAR struct usbhost_cdcmbim_s *)dev->d_private; FAR struct usbhost_hubport_s *hport = priv->usbclass.hport; int ret; #ifdef CONFIG_NET_IPv4 ninfo("Bringing up: %u.%u.%u.%u\n", ip4_addr1(dev->d_ipaddr), ip4_addr2(dev->d_ipaddr), ip4_addr3(dev->d_ipaddr), ip4_addr4(dev->d_ipaddr)); #endif #ifdef CONFIG_NET_IPv6 ninfo("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 /* Start RX asynch on bulk in */ if (priv->bulkin) { ret = DRVR_ASYNCH(hport->drvr, priv->bulkin, priv->rxnetbuf, CDCMBIM_NETBUF_SIZE, usbhost_bulkin_callback, priv); if (ret < 0) { uerr("ERROR: DRVR_ASYNCH failed on bulkin: %d\n", ret); } } priv->bifup = true; return OK; } /**************************************************************************** * Name: cdcmbim_ifdown * * Description: * NuttX Callback: Stop the interface. * * Input Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static int cdcmbim_ifdown(FAR struct net_driver_s *dev) { FAR struct usbhost_cdcmbim_s *priv = (FAR struct usbhost_cdcmbim_s *)dev->d_private; irqstate_t flags; flags = enter_critical_section(); /* Mark the device "down" */ priv->bifup = false; leave_critical_section(flags); return OK; } /**************************************************************************** * Name: cdcmbim_txavail_work * * 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. * * Input Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * Called in normal user mode * ****************************************************************************/ static void cdcmbim_txavail_work(FAR void *arg) { FAR struct usbhost_cdcmbim_s *priv = (FAR struct usbhost_cdcmbim_s *)arg; net_lock(); priv->netdev.d_buf = (FAR uint8_t *)priv->txpktbuf; if (priv->bifup) { devif_poll(&priv->netdev, cdcmbim_txpoll); } net_unlock(); } /**************************************************************************** * Name: cdcmbim_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. * * Input Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * Called from the network stack with the network locked. * ****************************************************************************/ static int cdcmbim_txavail(FAR struct net_driver_s *dev) { FAR struct usbhost_cdcmbim_s *priv = (FAR struct usbhost_cdcmbim_s *)dev->d_private; if (work_available(&priv->txpollwork)) { work_queue(LPWORK, &priv->txpollwork, cdcmbim_txavail_work, priv, 0); } return OK; } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: usbhost_cdcmbim_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_cdcmbim_initialize(void) { /* Perform any one-time initialization of the class implementation */ /* Advertise our availability to support CDC MBIM devices */ return usbhost_registerclass(&g_cdcmbim); }