diff options
Diffstat (limited to 'nuttx/drivers/usbdev/cdcacm.c')
| -rw-r--r-- | nuttx/drivers/usbdev/cdcacm.c | 2329 |
1 files changed, 0 insertions, 2329 deletions
diff --git a/nuttx/drivers/usbdev/cdcacm.c b/nuttx/drivers/usbdev/cdcacm.c deleted file mode 100644 index cb8679976..000000000 --- a/nuttx/drivers/usbdev/cdcacm.c +++ /dev/null @@ -1,2329 +0,0 @@ -/**************************************************************************** - * drivers/usbdev/cdcacm.c - * - * Copyright (C) 2011-2013 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * 3. Neither the name NuttX nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -#include <nuttx/config.h> - -#include <sys/types.h> -#include <stdint.h> -#include <stdbool.h> -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <semaphore.h> -#include <string.h> -#include <errno.h> -#include <queue.h> -#include <debug.h> - -#include <nuttx/kmalloc.h> -#include <nuttx/arch.h> -#include <nuttx/serial/serial.h> - -#include <nuttx/usb/usb.h> -#include <nuttx/usb/cdc.h> -#include <nuttx/usb/usbdev.h> -#include <nuttx/usb/cdcacm.h> -#include <nuttx/usb/usbdev_trace.h> - -#include "cdcacm.h" - -#ifdef CONFIG_USBMSC_COMPOSITE -# include <nuttx/usb/composite.h> -# include "composite.h" -#endif - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/* Container to support a list of requests */ - -struct cdcacm_req_s -{ - FAR struct cdcacm_req_s *flink; /* Implements a singly linked list */ - FAR struct usbdev_req_s *req; /* The contained request */ -}; - -/* This structure describes the internal state of the driver */ - -struct cdcacm_dev_s -{ - FAR struct uart_dev_s serdev; /* Serial device structure */ - FAR struct usbdev_s *usbdev; /* usbdev driver pointer */ - - uint8_t config; /* Configuration number */ - uint8_t nwrq; /* Number of queue write requests (in reqlist)*/ - uint8_t nrdq; /* Number of queue read requests (in epbulkout) */ - uint8_t minor; /* The device minor number */ - bool rxenabled; /* true: UART RX "interrupts" enabled */ - int16_t rxhead; /* Working head; used when rx int disabled */ - - uint8_t ctrlline; /* Buffered control line state */ - struct cdc_linecoding_s linecoding; /* Buffered line status */ - cdcacm_callback_t callback; /* Serial event callback function */ - - FAR struct usbdev_ep_s *epintin; /* Interrupt IN endpoint structure */ - FAR struct usbdev_ep_s *epbulkin; /* Bulk IN endpoint structure */ - FAR struct usbdev_ep_s *epbulkout; /* Bulk OUT endpoint structure */ - FAR struct usbdev_req_s *ctrlreq; /* Allocoated control request */ - struct sq_queue_s reqlist; /* List of write request containers */ - - /* Pre-allocated write request containers. The write requests will - * be linked in a free list (reqlist), and used to send requests to - * EPBULKIN; Read requests will be queued in the EBULKOUT. - */ - - struct cdcacm_req_s wrreqs[CONFIG_CDCACM_NWRREQS]; - struct cdcacm_req_s rdreqs[CONFIG_CDCACM_NWRREQS]; - - /* Serial I/O buffers */ - - char rxbuffer[CONFIG_CDCACM_RXBUFSIZE]; - char txbuffer[CONFIG_CDCACM_TXBUFSIZE]; -}; - -/* The internal version of the class driver */ - -struct cdcacm_driver_s -{ - struct usbdevclass_driver_s drvr; - FAR struct cdcacm_dev_s *dev; -}; - -/* This is what is allocated */ - -struct cdcacm_alloc_s -{ - struct cdcacm_dev_s dev; - struct cdcacm_driver_s drvr; -}; - -/**************************************************************************** - * Private Function Prototypes - ****************************************************************************/ - -/* Transfer helpers *********************************************************/ - -static uint16_t cdcacm_fillrequest(FAR struct cdcacm_dev_s *priv, - uint8_t *reqbuf, uint16_t reqlen); -static int cdcacm_sndpacket(FAR struct cdcacm_dev_s *priv); -static inline int cdcacm_recvpacket(FAR struct cdcacm_dev_s *priv, - uint8_t *reqbuf, uint16_t reqlen); - -/* Request helpers *********************************************************/ - -static struct usbdev_req_s *cdcacm_allocreq(FAR struct usbdev_ep_s *ep, - uint16_t len); -static void cdcacm_freereq(FAR struct usbdev_ep_s *ep, - FAR struct usbdev_req_s *req); - -/* Configuration ***********************************************************/ - -static void cdcacm_resetconfig(FAR struct cdcacm_dev_s *priv); -#ifdef CONFIG_USBDEV_DUALSPEED -static int cdcacm_epconfigure(FAR struct usbdev_ep_s *ep, - enum cdcacm_epdesc_e epid, uint16_t mxpacket, bool last); -#endif -static int cdcacm_setconfig(FAR struct cdcacm_dev_s *priv, - uint8_t config); - -/* Completion event handlers ***********************************************/ - -static void cdcacm_ep0incomplete(FAR struct usbdev_ep_s *ep, - FAR struct usbdev_req_s *req); -static void cdcacm_rdcomplete(FAR struct usbdev_ep_s *ep, - FAR struct usbdev_req_s *req); -static void cdcacm_wrcomplete(FAR struct usbdev_ep_s *ep, - FAR struct usbdev_req_s *req); - -/* USB class device ********************************************************/ - -static int cdcacm_bind(FAR struct usbdevclass_driver_s *driver, - FAR struct usbdev_s *dev); -static void cdcacm_unbind(FAR struct usbdevclass_driver_s *driver, - FAR struct usbdev_s *dev); -static int cdcacm_setup(FAR struct usbdevclass_driver_s *driver, - FAR struct usbdev_s *dev, - FAR const struct usb_ctrlreq_s *ctrl, FAR uint8_t *dataout, - size_t outlen); -static void cdcacm_disconnect(FAR struct usbdevclass_driver_s *driver, - FAR struct usbdev_s *dev); -#ifdef CONFIG_SERIAL_REMOVABLE -static void cdcacm_suspend(FAR struct usbdevclass_driver_s *driver, - FAR struct usbdev_s *dev); -static void cdcacm_resume(FAR struct usbdevclass_driver_s *driver, - FAR struct usbdev_s *dev); -#endif - -/* UART Operations **********************************************************/ - -static int cdcuart_setup(FAR struct uart_dev_s *dev); -static void cdcuart_shutdown(FAR struct uart_dev_s *dev); -static int cdcuart_attach(FAR struct uart_dev_s *dev); -static void cdcuart_detach(FAR struct uart_dev_s *dev); -static int cdcuart_ioctl(FAR struct file *filep,int cmd,unsigned long arg); -static void cdcuart_rxint(FAR struct uart_dev_s *dev, bool enable); -static void cdcuart_txint(FAR struct uart_dev_s *dev, bool enable); -static bool cdcuart_txempty(FAR struct uart_dev_s *dev); - -/**************************************************************************** - * Private Variables - ****************************************************************************/ -/* USB class device *********************************************************/ - -static const struct usbdevclass_driverops_s g_driverops = -{ - cdcacm_bind, /* bind */ - cdcacm_unbind, /* unbind */ - cdcacm_setup, /* setup */ - cdcacm_disconnect, /* disconnect */ -#ifdef CONFIG_SERIAL_REMOVABLE - cdcacm_suspend, /* suspend */ - cdcacm_resume, /* resume */ -#else - NULL, /* suspend */ - NULL, /* resume */ -#endif -}; - -/* Serial port **************************************************************/ - -static const struct uart_ops_s g_uartops = -{ - cdcuart_setup, /* setup */ - cdcuart_shutdown, /* shutdown */ - cdcuart_attach, /* attach */ - cdcuart_detach, /* detach */ - cdcuart_ioctl, /* ioctl */ - NULL, /* receive */ - cdcuart_rxint, /* rxinit */ - NULL, /* rxavailable */ - NULL, /* send */ - cdcuart_txint, /* txinit */ - NULL, /* txready */ - cdcuart_txempty /* txempty */ -}; - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: cdcacm_fillrequest - * - * Description: - * If there is data to send it is copied to the given buffer. Called - * either to initiate the first write operation, or from the completion - * interrupt handler service consecutive write operations. - * - * NOTE: The USB serial driver does not use the serial drivers - * uart_xmitchars() API. That logic is essentially duplicated here because - * unlike UART hardware, we need to be able to handle writes not byte-by-byte, - * but packet-by-packet. Unfortunately, that decision also exposes some - * internals of the serial driver in the following. - * - ****************************************************************************/ - -static uint16_t cdcacm_fillrequest(FAR struct cdcacm_dev_s *priv, uint8_t *reqbuf, - uint16_t reqlen) -{ - FAR uart_dev_t *serdev = &priv->serdev; - FAR struct uart_buffer_s *xmit = &serdev->xmit; - irqstate_t flags; - uint16_t nbytes = 0; - - /* Disable interrupts */ - - flags = irqsave(); - - /* Transfer bytes while we have bytes available and there is room in the request */ - - while (xmit->head != xmit->tail && nbytes < reqlen) - { - *reqbuf++ = xmit->buffer[xmit->tail]; - nbytes++; - - /* Increment the tail pointer */ - - if (++(xmit->tail) >= xmit->size) - { - xmit->tail = 0; - } - } - - /* When all of the characters have been sent from the buffer - * disable the "TX interrupt". - */ - - if (xmit->head == xmit->tail) - { - uart_disabletxint(serdev); - } - - /* If any bytes were removed from the buffer, inform any waiters - * there there is space available. - */ - - if (nbytes) - { - uart_datasent(serdev); - } - - irqrestore(flags); - return nbytes; -} - -/**************************************************************************** - * Name: cdcacm_sndpacket - * - * Description: - * This function obtains write requests, transfers the TX data into the - * request, and submits the requests to the USB controller. This continues - * untils either (1) there are no further packets available, or (2) thre is - * no further data to send. - * - ****************************************************************************/ - -static int cdcacm_sndpacket(FAR struct cdcacm_dev_s *priv) -{ - FAR struct usbdev_ep_s *ep; - FAR struct usbdev_req_s *req; - FAR struct cdcacm_req_s *reqcontainer; - uint16_t reqlen; - irqstate_t flags; - int len; - int ret = OK; - -#ifdef CONFIG_DEBUG - if (priv == NULL) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0); - return -ENODEV; - } -#endif - - flags = irqsave(); - - /* Use our IN endpoint for the transfer */ - - ep = priv->epbulkin; - - /* Loop until either (1) we run out or write requests, or (2) cdcacm_fillrequest() - * is unable to fill the request with data (i.e., until there is no more data - * to be sent). - */ - - uvdbg("head=%d tail=%d nwrq=%d empty=%d\n", - priv->serdev.xmit.head, priv->serdev.xmit.tail, - priv->nwrq, sq_empty(&priv->reqlist)); - - /* Get the maximum number of bytes that will fit into one bulk IN request */ - -#ifdef CONFIG_CDCACM_BULKREQLEN - reqlen = MAX(CONFIG_CDCACM_BULKREQLEN, ep->maxpacket); -#else - reqlen = ep->maxpacket; -#endif - - while (!sq_empty(&priv->reqlist)) - { - /* Peek at the request in the container at the head of the list */ - - reqcontainer = (struct cdcacm_req_s *)sq_peek(&priv->reqlist); - req = reqcontainer->req; - - /* Fill the request with serial TX data */ - - len = cdcacm_fillrequest(priv, req->buf, reqlen); - if (len > 0) - { - /* Remove the empty container from the request list */ - - (void)sq_remfirst(&priv->reqlist); - priv->nwrq--; - - /* Then submit the request to the endpoint */ - - req->len = len; - req->priv = reqcontainer; - req->flags = USBDEV_REQFLAGS_NULLPKT; - ret = EP_SUBMIT(ep, req); - if (ret != OK) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_SUBMITFAIL), (uint16_t)-ret); - break; - } - } - else - { - break; - } - } - - irqrestore(flags); - return ret; -} - -/**************************************************************************** - * Name: cdcacm_recvpacket - * - * Description: - * A normal completion event was received by the read completion handler - * at the interrupt level (with interrupts disabled). This function handles - * the USB packet and provides the received data to the uart RX buffer. - * - * Assumptions: - * Called from the USB interrupt handler with interrupts disabled. - * - ****************************************************************************/ - -static inline int cdcacm_recvpacket(FAR struct cdcacm_dev_s *priv, - uint8_t *reqbuf, uint16_t reqlen) -{ - FAR uart_dev_t *serdev = &priv->serdev; - FAR struct uart_buffer_s *recv = &serdev->recv; - uint16_t currhead; - uint16_t nexthead; - uint16_t nbytes = 0; - - uvdbg("head=%d tail=%d nrdq=%d reqlen=%d\n", - priv->serdev.recv.head, priv->serdev.recv.tail, priv->nrdq, reqlen); - - /* Get the next head index. During the time that RX interrupts are disabled, the - * the serial driver will be extracting data from the circular buffer and modifying - * recv.tail. During this time, we should avoid modifying recv.head; Instead we will - * use a shadow copy of the index. When interrupts are restored, the real recv.head - * will be updated with this indes. - */ - - if (priv->rxenabled) - { - currhead = recv->head; - } - else - { - currhead = priv->rxhead; - } - - /* Pre-calculate the head index and check for wrap around. We need to do this - * so that we can determine if the circular buffer will overrun BEFORE we - * overrun the buffer! - */ - - nexthead = currhead + 1; - if (nexthead >= recv->size) - { - nexthead = 0; - } - - /* Then copy data into the RX buffer until either: (1) all of the data has been - * copied, or (2) the RX buffer is full. NOTE: If the RX buffer becomes full, - * then we have overrun the serial driver and data will be lost. - */ - - while (nexthead != recv->tail && nbytes < reqlen) - { - /* Copy one byte to the head of the circular RX buffer */ - - recv->buffer[currhead] = *reqbuf++; - - /* Update counts and indices */ - - currhead = nexthead; - nbytes++; - - /* Increment the head index and check for wrap around */ - - nexthead = currhead + 1; - if (nexthead >= recv->size) - { - nexthead = 0; - } - } - - /* Write back the head pointer using the shadow index if RX "interrupts" - * are disabled. - */ - - if (priv->rxenabled) - { - recv->head = currhead; - } - else - { - priv->rxhead = currhead; - } - - /* If data was added to the incoming serial buffer, then wake up any - * threads is waiting for incoming data. If we are running in an interrupt - * handler, then the serial driver will not run until the interrupt handler - * returns. - */ - - if (priv->rxenabled && nbytes > 0) - { - uart_datareceived(serdev); - } - - /* Return an error if the entire packet could not be transferred */ - - if (nbytes < reqlen) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_RXOVERRUN), 0); - return -ENOSPC; - } - return OK; -} - -/**************************************************************************** - * Name: cdcacm_allocreq - * - * Description: - * Allocate a request instance along with its buffer - * - ****************************************************************************/ - -static struct usbdev_req_s *cdcacm_allocreq(FAR struct usbdev_ep_s *ep, - uint16_t len) -{ - FAR struct usbdev_req_s *req; - - req = EP_ALLOCREQ(ep); - if (req != NULL) - { - req->len = len; - req->buf = EP_ALLOCBUFFER(ep, len); - if (!req->buf) - { - EP_FREEREQ(ep, req); - req = NULL; - } - } - return req; -} - -/**************************************************************************** - * Name: cdcacm_freereq - * - * Description: - * Free a request instance along with its buffer - * - ****************************************************************************/ - -static void cdcacm_freereq(FAR struct usbdev_ep_s *ep, - FAR struct usbdev_req_s *req) -{ - if (ep != NULL && req != NULL) - { - if (req->buf != NULL) - { - EP_FREEBUFFER(ep, req->buf); - } - EP_FREEREQ(ep, req); - } -} - -/**************************************************************************** - * Name: cdcacm_resetconfig - * - * Description: - * Mark the device as not configured and disable all endpoints. - * - ****************************************************************************/ - -static void cdcacm_resetconfig(FAR struct cdcacm_dev_s *priv) -{ - /* Are we configured? */ - - if (priv->config != CDCACM_CONFIGIDNONE) - { - /* Yes.. but not anymore */ - - priv->config = CDCACM_CONFIGIDNONE; - - /* Inform the "upper half" driver that there is no (functional) USB - * connection. - */ - -#ifdef CONFIG_SERIAL_REMOVABLE - uart_connected(&priv->serdev, false); -#endif - - /* Disable endpoints. This should force completion of all pending - * transfers. - */ - - EP_DISABLE(priv->epintin); - EP_DISABLE(priv->epbulkin); - EP_DISABLE(priv->epbulkout); - } -} - -/**************************************************************************** - * Name: cdcacm_epconfigure - * - * Description: - * Configure one endpoint. - * - ****************************************************************************/ - -#ifdef CONFIG_USBDEV_DUALSPEED -static int cdcacm_epconfigure(FAR struct usbdev_ep_s *ep, - enum cdcacm_epdesc_e epid, uint16_t mxpacket, - bool last) -{ - struct usb_epdesc_s epdesc; - cdcacm_mkepdesc(epid, mxpacket, &epdesc); - return EP_CONFIGURE(ep, &epdesc, last); -} -#endif - -/**************************************************************************** - * Name: cdcacm_setconfig - * - * Description: - * Set the device configuration by allocating and configuring endpoints and - * by allocating and queue read and write requests. - * - ****************************************************************************/ - -static int cdcacm_setconfig(FAR struct cdcacm_dev_s *priv, uint8_t config) -{ - FAR struct usbdev_req_s *req; - int i; - int ret = 0; - -#if CONFIG_DEBUG - if (priv == NULL) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0); - return -EIO; - } -#endif - - if (config == priv->config) - { - /* Already configured -- Do nothing */ - - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_ALREADYCONFIGURED), 0); - return 0; - } - - /* Discard the previous configuration data */ - - cdcacm_resetconfig(priv); - - /* Was this a request to simply discard the current configuration? */ - - if (config == CDCACM_CONFIGIDNONE) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_CONFIGNONE), 0); - return 0; - } - - /* We only accept one configuration */ - - if (config != CDCACM_CONFIGID) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_CONFIGIDBAD), 0); - return -EINVAL; - } - - /* Configure the IN interrupt endpoint */ - -#ifdef CONFIG_USBDEV_DUALSPEED - if (priv->usbdev->speed == USB_SPEED_HIGH) - { - ret = cdcacm_epconfigure(priv->epintin, CDCACM_EPINTIN, - CONFIG_CDCACM_EPINTIN_HSSIZE, false); - } - else -#endif - { - ret = EP_CONFIGURE(priv->epintin, - cdcacm_getepdesc(CDCACM_EPINTIN), false); - } - - if (ret < 0) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_EPINTINCONFIGFAIL), 0); - goto errout; - } - priv->epintin->priv = priv; - - /* Configure the IN bulk endpoint */ - -#ifdef CONFIG_USBDEV_DUALSPEED - if (priv->usbdev->speed == USB_SPEED_HIGH) - { - ret = cdcacm_epconfigure(priv->epbulkin, CDCACM_EPBULKIN, - CONFIG_CDCACM_EPBULKIN_HSSIZE, false); - } - else -#endif - { - ret = EP_CONFIGURE(priv->epbulkin, - cdcacm_getepdesc(CDCACM_EPBULKIN), false); - } - - if (ret < 0) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_EPBULKINCONFIGFAIL), 0); - goto errout; - } - - priv->epbulkin->priv = priv; - - /* Configure the OUT bulk endpoint */ - -#ifdef CONFIG_USBDEV_DUALSPEED - if (priv->usbdev->speed == USB_SPEED_HIGH) - { - ret = cdcacm_epconfigure(priv->epbulkout, CDCACM_EPBULKOUT, - CONFIG_CDCACM_EPBULKOUT_HSSIZE, true); - } - else -#endif - { - ret = EP_CONFIGURE(priv->epbulkout, - cdcacm_getepdesc(CDCACM_EPBULKOUT), true); - } - - if (ret < 0) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_EPBULKOUTCONFIGFAIL), 0); - goto errout; - } - - priv->epbulkout->priv = priv; - - /* Queue read requests in the bulk OUT endpoint */ - - DEBUGASSERT(priv->nrdq == 0); - for (i = 0; i < CONFIG_CDCACM_NRDREQS; i++) - { - req = priv->rdreqs[i].req; - req->callback = cdcacm_rdcomplete; - ret = EP_SUBMIT(priv->epbulkout, req); - if (ret != OK) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_RDSUBMIT), (uint16_t)-ret); - goto errout; - } - - priv->nrdq++; - } - - /* We are successfully configured */ - - priv->config = config; - - /* Inform the "upper half" driver that we are "open for business" */ - -#ifdef CONFIG_SERIAL_REMOVABLE - uart_connected(&priv->serdev, true); -#endif - - return OK; - -errout: - cdcacm_resetconfig(priv); - return ret; -} - -/**************************************************************************** - * Name: cdcacm_ep0incomplete - * - * Description: - * Handle completion of EP0 control operations - * - ****************************************************************************/ - -static void cdcacm_ep0incomplete(FAR struct usbdev_ep_s *ep, - FAR struct usbdev_req_s *req) -{ - if (req->result || req->xfrd != req->len) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_REQRESULT), (uint16_t)-req->result); - } -} - -/**************************************************************************** - * Name: cdcacm_rdcomplete - * - * Description: - * Handle completion of read request on the bulk OUT endpoint. This - * is handled like the receipt of serial data on the "UART" - * - ****************************************************************************/ - -static void cdcacm_rdcomplete(FAR struct usbdev_ep_s *ep, - FAR struct usbdev_req_s *req) -{ - FAR struct cdcacm_dev_s *priv; - irqstate_t flags; - int ret; - - /* Sanity check */ - -#ifdef CONFIG_DEBUG - if (!ep || !ep->priv || !req) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0); - return; - } -#endif - - /* Extract references to private data */ - - priv = (FAR struct cdcacm_dev_s*)ep->priv; - - /* Process the received data unless this is some unusual condition */ - - flags = irqsave(); - switch (req->result) - { - case 0: /* Normal completion */ - usbtrace(TRACE_CLASSRDCOMPLETE, priv->nrdq); - cdcacm_recvpacket(priv, req->buf, req->xfrd); - break; - - case -ESHUTDOWN: /* Disconnection */ - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_RDSHUTDOWN), 0); - priv->nrdq--; - irqrestore(flags); - return; - - default: /* Some other error occurred */ - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_RDUNEXPECTED), (uint16_t)-req->result); - break; - }; - - /* Requeue the read request */ - -#ifdef CONFIG_CDCACM_BULKREQLEN - req->len = MAX(CONFIG_CDCACM_BULKREQLEN, ep->maxpacket); -#else - req->len = ep->maxpacket; -#endif - - ret = EP_SUBMIT(ep, req); - if (ret != OK) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_RDSUBMIT), (uint16_t)-req->result); - } - - irqrestore(flags); -} - -/**************************************************************************** - * Name: cdcacm_wrcomplete - * - * Description: - * Handle completion of write request. This function probably executes - * in the context of an interrupt handler. - * - ****************************************************************************/ - -static void cdcacm_wrcomplete(FAR struct usbdev_ep_s *ep, - FAR struct usbdev_req_s *req) -{ - FAR struct cdcacm_dev_s *priv; - FAR struct cdcacm_req_s *reqcontainer; - irqstate_t flags; - - /* Sanity check */ - -#ifdef CONFIG_DEBUG - if (!ep || !ep->priv || !req || !req->priv) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0); - return; - } -#endif - - /* Extract references to our private data */ - - priv = (FAR struct cdcacm_dev_s *)ep->priv; - reqcontainer = (FAR struct cdcacm_req_s *)req->priv; - - /* Return the write request to the free list */ - - flags = irqsave(); - sq_addlast((sq_entry_t*)reqcontainer, &priv->reqlist); - priv->nwrq++; - irqrestore(flags); - - /* Send the next packet unless this was some unusual termination - * condition - */ - - switch (req->result) - { - case OK: /* Normal completion */ - usbtrace(TRACE_CLASSWRCOMPLETE, priv->nwrq); - cdcacm_sndpacket(priv); - break; - - case -ESHUTDOWN: /* Disconnection */ - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_WRSHUTDOWN), priv->nwrq); - break; - - default: /* Some other error occurred */ - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_WRUNEXPECTED), (uint16_t)-req->result); - break; - } -} - -/**************************************************************************** - * USB Class Driver Methods - ****************************************************************************/ - -/**************************************************************************** - * Name: cdcacm_bind - * - * Description: - * Invoked when the driver is bound to a USB device driver - * - ****************************************************************************/ - -static int cdcacm_bind(FAR struct usbdevclass_driver_s *driver, - FAR struct usbdev_s *dev) -{ - FAR struct cdcacm_dev_s *priv = ((FAR struct cdcacm_driver_s*)driver)->dev; - FAR struct cdcacm_req_s *reqcontainer; - irqstate_t flags; - uint16_t reqlen; - int ret; - int i; - - usbtrace(TRACE_CLASSBIND, 0); - - /* Bind the structures */ - - priv->usbdev = dev; - - /* Save the reference to our private data structure in EP0 so that it - * can be recovered in ep0 completion events (Unless we are part of - * a composite device and, in that case, the composite device owns - * EP0). - */ - -#ifndef CONFIG_USBMSC_COMPOSITE - dev->ep0->priv = priv; -#endif - - /* Preallocate control request */ - - priv->ctrlreq = cdcacm_allocreq(dev->ep0, CDCACM_MXDESCLEN); - if (priv->ctrlreq == NULL) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_ALLOCCTRLREQ), 0); - ret = -ENOMEM; - goto errout; - } - - priv->ctrlreq->callback = cdcacm_ep0incomplete; - - /* Pre-allocate all endpoints... the endpoints will not be functional - * until the SET CONFIGURATION request is processed in cdcacm_setconfig. - * This is done here because there may be calls to kmalloc and the SET - * CONFIGURATION processing probably occurrs within interrupt handling - * logic where kmalloc calls will fail. - */ - - /* Pre-allocate the IN interrupt endpoint */ - - priv->epintin = DEV_ALLOCEP(dev, CDCACM_EPINTIN_ADDR, true, USB_EP_ATTR_XFER_INT); - if (!priv->epintin) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_EPINTINALLOCFAIL), 0); - ret = -ENODEV; - goto errout; - } - priv->epintin->priv = priv; - - /* Pre-allocate the IN bulk endpoint */ - - priv->epbulkin = DEV_ALLOCEP(dev, CDCACM_EPINBULK_ADDR, true, USB_EP_ATTR_XFER_BULK); - if (!priv->epbulkin) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_EPBULKINALLOCFAIL), 0); - ret = -ENODEV; - goto errout; - } - priv->epbulkin->priv = priv; - - /* Pre-allocate the OUT bulk endpoint */ - - priv->epbulkout = DEV_ALLOCEP(dev, CDCACM_EPOUTBULK_ADDR, false, USB_EP_ATTR_XFER_BULK); - if (!priv->epbulkout) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_EPBULKOUTALLOCFAIL), 0); - ret = -ENODEV; - goto errout; - } - priv->epbulkout->priv = priv; - - /* Pre-allocate read requests */ - -#ifdef CONFIG_CDCACM_BULKREQLEN - reqlen = MAX(CONFIG_CDCACM_BULKREQLEN, priv->epbulkout->maxpacket); -#else - reqlen = priv->epbulkout->maxpacket; -#endif - - for (i = 0; i < CONFIG_CDCACM_NRDREQS; i++) - { - reqcontainer = &priv->rdreqs[i]; - reqcontainer->req = cdcacm_allocreq(priv->epbulkout, reqlen); - if (reqcontainer->req == NULL) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_RDALLOCREQ), -ENOMEM); - ret = -ENOMEM; - goto errout; - } - reqcontainer->req->priv = reqcontainer; - reqcontainer->req->callback = cdcacm_rdcomplete; - } - - /* Pre-allocate write request containers and put in a free list */ - -#ifdef CONFIG_CDCACM_BULKREQLEN - reqlen = MAX(CONFIG_CDCACM_BULKREQLEN, priv->epbulkin->maxpacket); -#else - reqlen = priv->epbulkin->maxpacket; -#endif - - for (i = 0; i < CONFIG_CDCACM_NWRREQS; i++) - { - reqcontainer = &priv->wrreqs[i]; - reqcontainer->req = cdcacm_allocreq(priv->epbulkin, reqlen); - if (reqcontainer->req == NULL) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_WRALLOCREQ), -ENOMEM); - ret = -ENOMEM; - goto errout; - } - reqcontainer->req->priv = reqcontainer; - reqcontainer->req->callback = cdcacm_wrcomplete; - - flags = irqsave(); - sq_addlast((sq_entry_t*)reqcontainer, &priv->reqlist); - priv->nwrq++; /* Count of write requests available */ - irqrestore(flags); - } - - /* Report if we are selfpowered (unless we are part of a composite device) */ - -#ifndef CONFIG_CDCACM_COMPOSITE -#ifdef CONFIG_USBDEV_SELFPOWERED - DEV_SETSELFPOWERED(dev); -#endif - - /* And pull-up the data line for the soft connect function (unless we are - * part of a composite device) - */ - - DEV_CONNECT(dev); -#endif - return OK; - -errout: - cdcacm_unbind(driver, dev); - return ret; -} - -/**************************************************************************** - * Name: cdcacm_unbind - * - * Description: - * Invoked when the driver is unbound from a USB device driver - * - ****************************************************************************/ - -static void cdcacm_unbind(FAR struct usbdevclass_driver_s *driver, - FAR struct usbdev_s *dev) -{ - FAR struct cdcacm_dev_s *priv; - FAR struct cdcacm_req_s *reqcontainer; - irqstate_t flags; - int i; - - usbtrace(TRACE_CLASSUNBIND, 0); - -#ifdef CONFIG_DEBUG - if (!driver || !dev) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0); - return; - } -#endif - - /* Extract reference to private data */ - - priv = ((FAR struct cdcacm_driver_s*)driver)->dev; - -#ifdef CONFIG_DEBUG - if (!priv) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_EP0NOTBOUND), 0); - return; - } -#endif - - /* Make sure that we are not already unbound */ - - if (priv != NULL) - { - /* Make sure that the endpoints have been unconfigured. If - * we were terminated gracefully, then the configuration should - * already have been reset. If not, then calling cdcacm_resetconfig - * should cause the endpoints to immediately terminate all - * transfers and return the requests to us (with result == -ESHUTDOWN) - */ - - cdcacm_resetconfig(priv); - up_mdelay(50); - - /* Free the interrupt IN endpoint */ - - if (priv->epintin) - { - DEV_FREEEP(dev, priv->epintin); - priv->epintin = NULL; - } - - /* Free the bulk IN endpoint */ - - if (priv->epbulkin) - { - DEV_FREEEP(dev, priv->epbulkin); - priv->epbulkin = NULL; - } - - /* Free the pre-allocated control request */ - - if (priv->ctrlreq != NULL) - { - cdcacm_freereq(dev->ep0, priv->ctrlreq); - priv->ctrlreq = NULL; - } - - /* Free pre-allocated read requests (which should all have - * been returned to the free list at this time -- we don't check) - */ - - DEBUGASSERT(priv->nrdq == 0); - for (i = 0; i < CONFIG_CDCACM_NRDREQS; i++) - { - reqcontainer = &priv->rdreqs[i]; - if (reqcontainer->req) - { - cdcacm_freereq(priv->epbulkout, reqcontainer->req); - reqcontainer->req = NULL; - } - } - - /* Free the bulk OUT endpoint */ - - if (priv->epbulkout) - { - DEV_FREEEP(dev, priv->epbulkout); - priv->epbulkout = NULL; - } - - /* Free write requests that are not in use (which should be all - * of them) - */ - - flags = irqsave(); - DEBUGASSERT(priv->nwrq == CONFIG_CDCACM_NWRREQS); - while (!sq_empty(&priv->reqlist)) - { - reqcontainer = (struct cdcacm_req_s *)sq_remfirst(&priv->reqlist); - if (reqcontainer->req != NULL) - { - cdcacm_freereq(priv->epbulkin, reqcontainer->req); - priv->nwrq--; /* Number of write requests queued */ - } - } - DEBUGASSERT(priv->nwrq == 0); - irqrestore(flags); - } - - /* Clear out all data in the circular buffer */ - - priv->serdev.xmit.head = 0; - priv->serdev.xmit.tail = 0; -} - -/**************************************************************************** - * Name: cdcacm_setup - * - * Description: - * Invoked for ep0 control requests. This function probably executes - * in the context of an interrupt handler. - * - ****************************************************************************/ - -static int cdcacm_setup(FAR struct usbdevclass_driver_s *driver, - FAR struct usbdev_s *dev, - FAR const struct usb_ctrlreq_s *ctrl, - FAR uint8_t *dataout, size_t outlen) -{ - FAR struct cdcacm_dev_s *priv; - FAR struct usbdev_req_s *ctrlreq; - uint16_t value; - uint16_t index; - uint16_t len; - int ret = -EOPNOTSUPP; - -#ifdef CONFIG_DEBUG - if (!driver || !dev || !ctrl) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0); - return -EIO; - } -#endif - - /* Extract reference to private data */ - - usbtrace(TRACE_CLASSSETUP, ctrl->req); - priv = ((FAR struct cdcacm_driver_s*)driver)->dev; - -#ifdef CONFIG_DEBUG - if (!priv || !priv->ctrlreq) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_EP0NOTBOUND), 0); - return -ENODEV; - } -#endif - ctrlreq = priv->ctrlreq; - - /* Extract the little-endian 16-bit values to host order */ - - value = GETUINT16(ctrl->value); - index = GETUINT16(ctrl->index); - len = GETUINT16(ctrl->len); - - uvdbg("type=%02x req=%02x value=%04x index=%04x len=%04x\n", - ctrl->type, ctrl->req, value, index, len); - - if ((ctrl->type & USB_REQ_TYPE_MASK) == USB_REQ_TYPE_STANDARD) - { - /*********************************************************************** - * Standard Requests - ***********************************************************************/ - - switch (ctrl->req) - { - case USB_REQ_GETDESCRIPTOR: - { - /* The value field specifies the descriptor type in the MS byte and the - * descriptor index in the LS byte (order is little endian) - */ - - switch (ctrl->value[1]) - { - /* If the serial device is used in as part of a composite device, - * then the device descriptor is provided by logic in the composite - * device implementation. - */ - -#ifndef CONFIG_CDCACM_COMPOSITE - case USB_DESC_TYPE_DEVICE: - { - ret = USB_SIZEOF_DEVDESC; - memcpy(ctrlreq->buf, cdcacm_getdevdesc(), ret); - } - break; -#endif - - /* If the serial device is used in as part of a composite device, - * then the device qualifier descriptor is provided by logic in the - * composite device implementation. - */ - -#if !defined(CONFIG_CDCACM_COMPOSITE) && defined(CONFIG_USBDEV_DUALSPEED) - case USB_DESC_TYPE_DEVICEQUALIFIER: - { - ret = USB_SIZEOF_QUALDESC; - memcpy(ctrlreq->buf, cdcacm_getqualdesc(), ret); - } - break; - - case USB_DESC_TYPE_OTHERSPEEDCONFIG: -#endif - - /* If the serial device is used in as part of a composite device, - * then the configuration descriptor is provided by logic in the - * composite device implementation. - */ - -#ifndef CONFIG_CDCACM_COMPOSITE - case USB_DESC_TYPE_CONFIG: - { -#ifdef CONFIG_USBDEV_DUALSPEED - ret = cdcacm_mkcfgdesc(ctrlreq->buf, dev->speed, ctrl->req); -#else - ret = cdcacm_mkcfgdesc(ctrlreq->buf); -#endif - } - break; -#endif - - /* If the serial device is used in as part of a composite device, - * then the language string descriptor is provided by logic in the - * composite device implementation. - */ - -#ifndef CONFIG_CDCACM_COMPOSITE - case USB_DESC_TYPE_STRING: - { - /* index == language code. */ - - ret = cdcacm_mkstrdesc(ctrl->value[0], (struct usb_strdesc_s *)ctrlreq->buf); - } - break; -#endif - - default: - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_GETUNKNOWNDESC), value); - } - break; - } - } - break; - - case USB_REQ_SETCONFIGURATION: - { - if (ctrl->type == 0) - { - ret = cdcacm_setconfig(priv, value); - } - } - break; - - /* If the serial device is used in as part of a composite device, - * then the overall composite class configuration is managed by logic - * in the composite device implementation. - */ - -#ifndef CONFIG_CDCACM_COMPOSITE - case USB_REQ_GETCONFIGURATION: - { - if (ctrl->type == USB_DIR_IN) - { - *(uint8_t*)ctrlreq->buf = priv->config; - ret = 1; - } - } - break; -#endif - - case USB_REQ_SETINTERFACE: - { - if (ctrl->type == USB_REQ_RECIPIENT_INTERFACE && - priv->config == CDCACM_CONFIGID) - { - if ((index == CDCACM_NOTIFID && value == CDCACM_NOTALTIFID) || - (index == CDCACM_DATAIFID && value == CDCACM_DATAALTIFID)) - { - cdcacm_resetconfig(priv); - cdcacm_setconfig(priv, priv->config); - ret = 0; - } - } - } - break; - - case USB_REQ_GETINTERFACE: - { - if (ctrl->type == (USB_DIR_IN|USB_REQ_RECIPIENT_INTERFACE) && - priv->config == CDCACM_CONFIGIDNONE) - { - if ((index == CDCACM_NOTIFID && value == CDCACM_NOTALTIFID) || - (index == CDCACM_DATAIFID && value == CDCACM_DATAALTIFID)) - { - *(uint8_t*) ctrlreq->buf = value; - ret = 1; - } - else - { - ret = -EDOM; - } - } - } - break; - - default: - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_UNSUPPORTEDSTDREQ), ctrl->req); - break; - } - } - - else if ((ctrl->type & USB_REQ_TYPE_MASK) == USB_REQ_TYPE_CLASS) - { - /*********************************************************************** - * CDC ACM-Specific Requests - ***********************************************************************/ - - switch (ctrl->req) - { - /* ACM_GET_LINE_CODING requests current DTE rate, stop-bits, parity, and - * number-of-character bits. (Optional) - */ - - case ACM_GET_LINE_CODING: - { - if (ctrl->type == (USB_DIR_IN|USB_REQ_TYPE_CLASS|USB_REQ_RECIPIENT_INTERFACE) && - index == CDCACM_NOTIFID) - { - /* Return the current line status from the private data structure */ - - memcpy(ctrlreq->buf, &priv->linecoding, SIZEOF_CDC_LINECODING); - ret = SIZEOF_CDC_LINECODING; - } - else - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_UNSUPPORTEDCLASSREQ), ctrl->type); - } - } - break; - - /* ACM_SET_LINE_CODING configures DTE rate, stop-bits, parity, and - * number-of-character bits. (Optional) - */ - - case ACM_SET_LINE_CODING: - { - if (ctrl->type == (USB_DIR_OUT|USB_REQ_TYPE_CLASS|USB_REQ_RECIPIENT_INTERFACE) && - len == SIZEOF_CDC_LINECODING && /* dataout && len == outlen && */ - index == CDCACM_NOTIFID) - { - /* Save the new line coding in the private data structure. NOTE: - * that this is conditional now because not all device controller - * drivers supported provisioni of EP0 OUT data with the setup - * command. - */ - - if (dataout && len <= SIZEOF_CDC_LINECODING) /* REVISIT */ - { - memcpy(&priv->linecoding, dataout, SIZEOF_CDC_LINECODING); - } - ret = 0; - - /* If there is a registered callback to receive line status info, then - * callout now. - */ - - if (priv->callback) - { - priv->callback(CDCACM_EVENT_LINECODING); - } - } - else - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_UNSUPPORTEDCLASSREQ), ctrl->type); - } - } - break; - - /* ACM_SET_CTRL_LINE_STATE: RS-232 signal used to tell the DCE device the - * DTE device is now present. (Optional) - */ - - case ACM_SET_CTRL_LINE_STATE: - { - if (ctrl->type == (USB_DIR_OUT|USB_REQ_TYPE_CLASS|USB_REQ_RECIPIENT_INTERFACE) && - index == CDCACM_NOTIFID) - { - /* Save the control line state in the private data structure. Only bits - * 0 and 1 have meaning. - */ - - priv->ctrlline = value & 3; - ret = 0; - - /* If there is a registered callback to receive control line status info, - * then callout now. - */ - - if (priv->callback) - { - priv->callback(CDCACM_EVENT_CTRLLINE); - } - } - else - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_UNSUPPORTEDCLASSREQ), ctrl->type); - } - } - break; - - /* Sends special carrier*/ - - case ACM_SEND_BREAK: - { - if (ctrl->type == (USB_DIR_OUT|USB_REQ_TYPE_CLASS|USB_REQ_RECIPIENT_INTERFACE) && - index == CDCACM_NOTIFID) - { - /* If there is a registered callback to handle the SendBreak request, - * then callout now. - */ - - ret = 0; - if (priv->callback) - { - priv->callback(CDCACM_EVENT_SENDBREAK); - } - } - else - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_UNSUPPORTEDCLASSREQ), ctrl->type); - } - } - break; - - default: - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_UNSUPPORTEDCLASSREQ), ctrl->req); - break; - } - } - else - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_UNSUPPORTEDTYPE), ctrl->type); - } - - /* Respond to the setup command if data was returned. On an error return - * value (ret < 0), the USB driver will stall. - */ - - if (ret >= 0) - { - /* Configure the response */ - - ctrlreq->len = MIN(len, ret); - ctrlreq->flags = USBDEV_REQFLAGS_NULLPKT; - - /* Send the response -- either directly to the USB controller or - * indirectly in the case where this class is a member of a composite - * device. - */ - -#ifndef CONFIG_CDCACM_COMPOSITE - ret = EP_SUBMIT(dev->ep0, ctrlreq); -#else - ret = composite_ep0submit(driver, dev, ctrlreq); -#endif - if (ret < 0) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_EPRESPQ), (uint16_t)-ret); - ctrlreq->result = OK; - cdcacm_ep0incomplete(dev->ep0, ctrlreq); - } - } - return ret; -} - -/**************************************************************************** - * Name: cdcacm_disconnect - * - * Description: - * Invoked after all transfers have been stopped, when the host is - * disconnected. This function is probably called from the context of an - * interrupt handler. - * - ****************************************************************************/ - -static void cdcacm_disconnect(FAR struct usbdevclass_driver_s *driver, - FAR struct usbdev_s *dev) -{ - FAR struct cdcacm_dev_s *priv; - irqstate_t flags; - - usbtrace(TRACE_CLASSDISCONNECT, 0); - -#ifdef CONFIG_DEBUG - if (!driver || !dev || !dev->ep0) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0); - return; - } -#endif - - /* Extract reference to private data */ - - priv = ((FAR struct cdcacm_driver_s*)driver)->dev; - -#ifdef CONFIG_DEBUG - if (!priv) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_EP0NOTBOUND), 0); - return; - } -#endif - - /* Inform the "upper half serial driver that we have lost the USB serial - * connection. - */ - - flags = irqsave(); -#ifdef CONFIG_SERIAL_REMOVABLE - uart_connected(&priv->serdev, false); -#endif - - /* Reset the configuration */ - - cdcacm_resetconfig(priv); - - /* Clear out all outgoing data in the circular buffer */ - - priv->serdev.xmit.head = 0; - priv->serdev.xmit.tail = 0; - irqrestore(flags); - - /* Perform the soft connect function so that we will we can be - * re-enumerated (unless we are part of a composite device) - */ - -#ifndef CONFIG_CDCACM_COMPOSITE - DEV_CONNECT(dev); -#endif -} - -/**************************************************************************** - * Name: cdcacm_suspend - * - * Description: - * Handle the USB suspend event. - * - ****************************************************************************/ - -#ifdef CONFIG_SERIAL_REMOVABLE -static void cdcacm_suspend(FAR struct usbdevclass_driver_s *driver, - FAR struct usbdev_s *dev) -{ - FAR struct cdcacm_dev_s *priv; - - usbtrace(TRACE_CLASSSUSPEND, 0); - -#ifdef CONFIG_DEBUG - if (!driver || !dev) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0); - return; - } -#endif - - /* Extract reference to private data */ - - priv = ((FAR struct cdcacm_driver_s*)driver)->dev; - - /* And let the "upper half" driver now that we are suspended */ - - uart_connected(&priv->serdev, false); -} -#endif - -/**************************************************************************** - * Name: cdcacm_resume - * - * Description: - * Handle the USB resume event. - * - ****************************************************************************/ - -#ifdef CONFIG_SERIAL_REMOVABLE -static void cdcacm_resume(FAR struct usbdevclass_driver_s *driver, - FAR struct usbdev_s *dev) -{ - FAR struct cdcacm_dev_s *priv; - - usbtrace(TRACE_CLASSRESUME, 0); - -#ifdef CONFIG_DEBUG - if (!driver || !dev) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0); - return; - } -#endif - - /* Extract reference to private data */ - - priv = ((FAR struct cdcacm_driver_s*)driver)->dev; - - /* Are we still configured? */ - - if (priv->config != CDCACM_CONFIGIDNONE) - { - /* Yes.. let the "upper half" know that have resumed */ - - uart_connected(&priv->serdev, true); - } -} -#endif - -/**************************************************************************** - * Serial Device Methods - ****************************************************************************/ - -/**************************************************************************** - * Name: cdcuart_setup - * - * Description: - * This method is called the first time that the serial port is opened. - * - ****************************************************************************/ - -static int cdcuart_setup(FAR struct uart_dev_s *dev) -{ - FAR struct cdcacm_dev_s *priv; - - usbtrace(CDCACM_CLASSAPI_SETUP, 0); - - /* Sanity check */ - -#if CONFIG_DEBUG - if (!dev || !dev->priv) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0); - return -EIO; - } -#endif - - /* Extract reference to private data */ - - priv = (FAR struct cdcacm_dev_s*)dev->priv; - - /* Check if we have been configured */ - - if (priv->config == CDCACM_CONFIGIDNONE) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_SETUPNOTCONNECTED), 0); - return -ENOTCONN; - } - - return OK; -} - -/**************************************************************************** - * Name: cdcuart_shutdown - * - * Description: - * This method is called when the serial port is closed. This operation - * is very simple for the USB serial backend because the serial driver - * has already assured that the TX data has full drained -- it calls - * cdcuart_txempty() until that function returns true before calling this - * function. - * - ****************************************************************************/ - -static void cdcuart_shutdown(FAR struct uart_dev_s *dev) -{ - usbtrace(CDCACM_CLASSAPI_SHUTDOWN, 0); - - /* Sanity check */ - -#if CONFIG_DEBUG - if (!dev || !dev->priv) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0); - } -#endif -} - -/**************************************************************************** - * Name: cdcuart_attach - * - * Description: - * Does not apply to the USB serial class device - * - ****************************************************************************/ - -static int cdcuart_attach(FAR struct uart_dev_s *dev) -{ - usbtrace(CDCACM_CLASSAPI_ATTACH, 0); - return OK; -} - -/**************************************************************************** - * Name: cdcuart_detach - * - * Description: -* Does not apply to the USB serial class device - * - ****************************************************************************/ - -static void cdcuart_detach(FAR struct uart_dev_s *dev) -{ - usbtrace(CDCACM_CLASSAPI_DETACH, 0); -} - -/**************************************************************************** - * Name: cdcuart_ioctl - * - * Description: - * All ioctl calls will be routed through this method - * - ****************************************************************************/ - -static int cdcuart_ioctl(FAR struct file *filep,int cmd,unsigned long arg) -{ - struct inode *inode = filep->f_inode; - struct cdcacm_dev_s *priv = inode->i_private; - int ret = OK; - - switch (cmd) - { - /* CAICO_REGISTERCB - * Register a callback for serial event notification. Argument: - * cdcacm_callback_t. See cdcacm_callback_t type definition below. - * NOTE: The callback will most likely invoked at the interrupt level. - * The called back function should, therefore, limit its operations to - * invoking some kind of IPC to handle the serial event in some normal - * task environment. - */ - - case CAIOC_REGISTERCB: - { - /* Save the new callback function */ - - priv->callback = (cdcacm_callback_t)((uintptr_t)arg); - } - break; - - /* CAIOC_GETLINECODING - * Get current line coding. Argument: struct cdc_linecoding_s*. - * See include/nuttx/usb/cdc.h for structure definition. This IOCTL - * should be called to get the data associated with the - * CDCACM_EVENT_LINECODING event). - */ - - case CAIOC_GETLINECODING: - { - FAR struct cdc_linecoding_s *ptr = (FAR struct cdc_linecoding_s *)((uintptr_t)arg); - if (ptr) - { - memcpy(ptr, &priv->linecoding, sizeof(struct cdc_linecoding_s)); - } - else - { - ret = -EINVAL; - } - } - break; - - /* CAIOC_GETCTRLLINE - * Get control line status bits. Argument FAR int*. See - * include/nuttx/usb/cdc.h for bit definitions. This IOCTL should be - * called to get the data associated CDCACM_EVENT_CTRLLINE event. - */ - - case CAIOC_GETCTRLLINE: - { - FAR int *ptr = (FAR int *)((uintptr_t)arg); - if (ptr) - { - *ptr = priv->ctrlline; - } - else - { - ret = -EINVAL; - } - } - break; - - /* CAIOC_NOTIFY - * Send a serial state to the host via the Interrupt IN endpoint. - * Argument: int. This includes the current state of the carrier detect, - * DSR, break, and ring signal. See "Table 69: UART State Bitmap Values" - * and CDC_UART_definitions in include/nuttx/usb/cdc.h. - */ - - case CAIOC_NOTIFY: - { - /* Not yet implemented. I probably won't bother to implement until - * I comr up with a usage model that needs it. - * - * Here is what the needs to be done: - * - * 1. Format and send a request header with: - * - * bmRequestType: - * USB_REQ_DIR_IN|USB_REQ_TYPE_CLASS|USB_REQ_RECIPIENT_INTERFACE - * bRequest: ACM_SERIAL_STATE - * wValue: 0 - * wIndex: 0 - * wLength: Length of data - * - * 2. Followed by the notification data (in a separate packet) - */ - - ret = -ENOSYS; - } - break; - - default: - ret = -ENOTTY; - break; - } - - return ret; -} - -/**************************************************************************** - * Name: cdcuart_rxint - * - * Description: - * Called by the serial driver to enable or disable RX interrupts. We, of - * course, have no RX interrupts but must behave consistently. This method - * is called under the conditions: - * - * 1. With enable==true when the port is opened (just after cdcuart_setup - * and cdcuart_attach are called called) - * 2. With enable==false while transferring data from the RX buffer - * 2. With enable==true while waiting for more incoming data - * 3. With enable==false when the port is closed (just before cdcuart_detach - * and cdcuart_shutdown are called). - * - ****************************************************************************/ - -static void cdcuart_rxint(FAR struct uart_dev_s *dev, bool enable) -{ - FAR struct cdcacm_dev_s *priv; - FAR uart_dev_t *serdev; - irqstate_t flags; - - usbtrace(CDCACM_CLASSAPI_RXINT, (uint16_t)enable); - - /* Sanity check */ - -#if CONFIG_DEBUG - if (!dev || !dev->priv) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0); - return; - } -#endif - - /* Extract reference to private data */ - - priv = (FAR struct cdcacm_dev_s*)dev->priv; - serdev = &priv->serdev; - - /* We need exclusive access to the RX buffer and private structure - * in the following. - */ - - flags = irqsave(); - if (enable) - { - /* RX "interrupts" are enabled. Is this a transition from disabled - * to enabled state? - */ - - if (!priv->rxenabled) - { - /* Yes. During the time that RX interrupts are disabled, the - * the serial driver will be extracting data from the circular - * buffer and modifying recv.tail. During this time, we - * should avoid modifying recv.head; When interrupts are restored, - * we can update the head pointer for all of the data that we - * put into cicular buffer while "interrupts" were disabled. - */ - - if (priv->rxhead != serdev->recv.head) - { - serdev->recv.head = priv->rxhead; - - /* Yes... signal the availability of new data */ - - uart_datareceived(serdev); - } - - /* RX "interrupts are no longer disabled */ - - priv->rxenabled = true; - } - } - - /* RX "interrupts" are disabled. Is this a transition from enabled - * to disabled state? - */ - - else if (priv->rxenabled) - { - /* Yes. During the time that RX interrupts are disabled, the - * the serial driver will be extracting data from the circular - * buffer and modifying recv.tail. During this time, we - * should avoid modifying recv.head; When interrupts are disabled, - * we use a shadow index and continue adding data to the circular - * buffer. - */ - - priv->rxhead = serdev->recv.head; - priv->rxenabled = false; - } - irqrestore(flags); -} - -/**************************************************************************** - * Name: cdcuart_txint - * - * Description: - * Called by the serial driver to enable or disable TX interrupts. We, of - * course, have no TX interrupts but must behave consistently. Initially, - * TX interrupts are disabled. This method is called under the conditions: - * - * 1. With enable==false while transferring data into the TX buffer - * 2. With enable==true when data may be taken from the buffer. - * 3. With enable==false when the TX buffer is empty - * - ****************************************************************************/ - -static void cdcuart_txint(FAR struct uart_dev_s *dev, bool enable) -{ - FAR struct cdcacm_dev_s *priv; - - usbtrace(CDCACM_CLASSAPI_TXINT, (uint16_t)enable); - - /* Sanity checks */ - -#if CONFIG_DEBUG - if (!dev || !dev->priv) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0); - return; - } -#endif - - /* Extract references to private data */ - - priv = (FAR struct cdcacm_dev_s*)dev->priv; - - /* If the new state is enabled and if there is data in the XMIT buffer, - * send the next packet now. - */ - - uvdbg("enable=%d head=%d tail=%d\n", - enable, priv->serdev.xmit.head, priv->serdev.xmit.tail); - - if (enable && priv->serdev.xmit.head != priv->serdev.xmit.tail) - { - cdcacm_sndpacket(priv); - } -} - -/**************************************************************************** - * Name: cdcuart_txempty - * - * Description: - * Return true when all data has been sent. This is called from the - * serial driver when the driver is closed. It will call this API - * periodically until it reports true. NOTE that the serial driver takes all - * responsibility for flushing TX data through the hardware so we can be - * a bit sloppy about that. - * - ****************************************************************************/ - -static bool cdcuart_txempty(FAR struct uart_dev_s *dev) -{ - FAR struct cdcacm_dev_s *priv = (FAR struct cdcacm_dev_s*)dev->priv; - - usbtrace(CDCACM_CLASSAPI_TXEMPTY, 0); - -#if CONFIG_DEBUG - if (!priv) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0); - return true; - } -#endif - - /* When all of the allocated write requests have been returned to the - * reqlist, then there is no longer any TX data in flight. - */ - - return priv->nwrq >= CONFIG_CDCACM_NWRREQS; -} - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: cdcacm_classobject - * - * Description: - * Register USB serial port (and USB serial console if so configured) and - * return the class object. - * - * Input Parameter: - * minor - Device minor number. E.g., minor 0 would correspond to - * /dev/ttyACM0. - * classdev - The location to return the CDC serial class' device - * instance. - * - * Returned Value: - * A pointer to the allocated class object (NULL on failure). - * - ****************************************************************************/ - -#ifndef CONFIG_CDCACM_COMPOSITE -static -#endif -int cdcacm_classobject(int minor, FAR struct usbdevclass_driver_s **classdev) -{ - FAR struct cdcacm_alloc_s *alloc; - FAR struct cdcacm_dev_s *priv; - FAR struct cdcacm_driver_s *drvr; - char devname[CDCACM_DEVNAME_SIZE]; - int ret; - - /* Allocate the structures needed */ - - alloc = (FAR struct cdcacm_alloc_s*)kmalloc(sizeof(struct cdcacm_alloc_s)); - if (!alloc) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_ALLOCDEVSTRUCT), 0); - return -ENOMEM; - } - - /* Convenience pointers into the allocated blob */ - - priv = &alloc->dev; - drvr = &alloc->drvr; - - /* Initialize the USB serial driver structure */ - - memset(priv, 0, sizeof(struct cdcacm_dev_s)); - sq_init(&priv->reqlist); - - priv->minor = minor; - - /* Fake line status */ - - priv->linecoding.baud[0] = (115200) & 0xff; /* Baud=115200 */ - priv->linecoding.baud[1] = (115200 >> 8) & 0xff; - priv->linecoding.baud[2] = (115200 >> 16) & 0xff; - priv->linecoding.baud[3] = (115200 >> 24) & 0xff; - priv->linecoding.stop = CDC_CHFMT_STOP1; /* One stop bit */ - priv->linecoding.parity = CDC_PARITY_NONE; /* No parity */ - priv->linecoding.nbits = 8; /* 8 data bits */ - - /* Initialize the serial driver sub-structure */ - - /* The initial state is disconnected */ - -#ifdef CONFIG_SERIAL_REMOVABLE - priv->serdev.disconnected = true; -#endif - priv->serdev.recv.size = CONFIG_CDCACM_RXBUFSIZE; - priv->serdev.recv.buffer = priv->rxbuffer; - priv->serdev.xmit.size = CONFIG_CDCACM_TXBUFSIZE; - priv->serdev.xmit.buffer = priv->txbuffer; - priv->serdev.ops = &g_uartops; - priv->serdev.priv = priv; - - /* Initialize the USB class driver structure */ - -#ifdef CONFIG_USBDEV_DUALSPEED - drvr->drvr.speed = USB_SPEED_HIGH; -#else - drvr->drvr.speed = USB_SPEED_FULL; -#endif - drvr->drvr.ops = &g_driverops; - drvr->dev = priv; - - /* Register the USB serial console */ - -#ifdef CONFIG_CDCACM_CONSOLE - priv->serdev.isconsole = true; - ret = uart_register("/dev/console", &priv->serdev); - if (ret < 0) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_CONSOLEREGISTER), (uint16_t)-ret); - goto errout_with_class; - } -#endif - - /* Register the CDC/ACM TTY device */ - - sprintf(devname, CDCACM_DEVNAME_FORMAT, minor); - ret = uart_register(devname, &priv->serdev); - if (ret < 0) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_UARTREGISTER), (uint16_t)-ret); - goto errout_with_class; - } - - *classdev = &drvr->drvr; - return OK; - -errout_with_class: - kfree(alloc); - return ret; -} - -/**************************************************************************** - * Name: cdcacm_initialize - * - * Description: - * Register USB serial port (and USB serial console if so configured). - * - * Input Parameter: - * minor - Device minor number. E.g., minor 0 would correspond to - * /dev/ttyACM0. - * handle - An optional opaque reference to the CDC/ACM class object that - * may subsequently be used with cdcacm_uninitialize(). - * - * Returned Value: - * Zero (OK) means that the driver was successfully registered. On any - * failure, a negated errno value is retured. - * - ****************************************************************************/ - -#ifndef CONFIG_CDCACM_COMPOSITE -int cdcacm_initialize(int minor, FAR void **handle) -{ - FAR struct usbdevclass_driver_s *drvr = NULL; - int ret; - - /* Get an instance of the serial driver class object */ - - ret = cdcacm_classobject(minor, &drvr); - if (ret == OK) - { - /* Register the USB serial class driver */ - - ret = usbdev_register(drvr); - if (ret < 0) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_DEVREGISTER), (uint16_t)-ret); - } - } - - /* Return the driver instance (if any) if the caller has requested it - * by provided a pointer to the location to return it. - */ - - if (handle) - { - *handle = (FAR void*)drvr; - } - - return ret; -} -#endif - -/**************************************************************************** - * Name: cdcacm_uninitialize - * - * Description: - * Un-initialize the USB storage class driver. This function is used - * internally by the USB composite driver to unitialize the CDC/ACM - * driver. This same interface is available (with an untyped input - * parameter) when the CDC/ACM driver is used standalone. - * - * Input Parameters: - * There is one parameter, it differs in typing depending upon whether the - * CDC/ACM driver is an internal part of a composite device, or a standalone - * USB driver: - * - * classdev - The class object returned by board_cdcclassobject() or - * cdcacm_classobject() - * handle - The opaque handle represetning the class object returned by - * a previous call to cdcacm_initialize(). - * - * Returned Value: - * None - * - ****************************************************************************/ - -#ifdef CONFIG_CDCACM_COMPOSITE -void cdcacm_uninitialize(FAR struct usbdevclass_driver_s *classdev) -#else -void cdcacm_uninitialize(FAR void *handle) -#endif -{ -#ifdef CONFIG_CDCACM_COMPOSITE - FAR struct cdcacm_driver_s *drvr = (FAR struct cdcacm_driver_s *)classdev; -#else - FAR struct cdcacm_driver_s *drvr = (FAR struct cdcacm_driver_s *)handle; -#endif - FAR struct cdcacm_dev_s *priv = drvr->dev; - char devname[CDCACM_DEVNAME_SIZE]; - int ret; - - /* Un-register the CDC/ACM TTY device */ - - sprintf(devname, CDCACM_DEVNAME_FORMAT, priv->minor); - ret = unregister_driver(devname); - if (ret < 0) - { - usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_UARTUNREGISTER), (uint16_t)-ret); - } - - /* Unregister the driver (unless we are a part of a composite device). The - * device unregister logic will (1) return all of the requests to us then - * (2) all the unbind method. - * - * The same thing will happen in the composite case except that: (1) the - * composite driver will call usbdev_unregister() which will (2) return the - * requests for all members of the composite, and (3) call the unbind - * method in the composite device which will (4) call the unbind method - * for this device. - */ - -#ifndef CONFIG_CDCACM_COMPOSITE - usbdev_unregister(&drvr->drvr); -#endif - - /* And free the driver structure */ - - kfree(priv); -} |