14a629bcf9
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4771 42af7a65-404d-4744-a932-0658087f49c3
2243 lines
65 KiB
C
2243 lines
65 KiB
C
/****************************************************************************
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* drivers/usbdev/pl2303.c
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*
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* Copyright (C) 2008-2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* This logic emulates the Prolific PL2303 serial/USB converter
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <semaphore.h>
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#include <string.h>
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#include <errno.h>
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#include <queue.h>
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#include <debug.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/arch.h>
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#include <nuttx/serial/serial.h>
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#include <nuttx/usb/usb.h>
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#include <nuttx/usb/usbdev.h>
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#include <nuttx/usb/usbdev_trace.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* Number of requests in the write queue */
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#ifndef CONFIG_PL2303_NWRREQS
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# define CONFIG_PL2303_NWRREQS 4
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#endif
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/* Number of requests in the read queue */
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#ifndef CONFIG_PL2303_NRDREQS
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# define CONFIG_PL2303_NRDREQS 4
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#endif
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/* Logical endpoint numbers / max packet sizes */
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#ifndef CONFIG_PL2303_EPINTIN
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# warning "EPINTIN not defined in the configuration"
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# define CONFIG_PL2303_EPINTIN 1
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#endif
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#ifndef CONFIG_PL2303_EPBULKOUT
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# warning "EPBULKOUT not defined in the configuration"
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# define CONFIG_PL2303_EPBULKOUT 2
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#endif
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#ifndef CONFIG_PL2303_EPBULKIN
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# warning "EPBULKIN not defined in the configuration"
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# define CONFIG_PL2303_EPBULKIN 3
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#endif
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/* Packet and request buffer sizes */
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#ifndef CONFIG_PL2303_EP0MAXPACKET
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# define CONFIG_PL2303_EP0MAXPACKET 64
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#endif
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#undef CONFIG_PL2303_BULKREQLEN
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/* Vendor and product IDs and strings */
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#ifndef CONFIG_PL2303_VENDORID
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# define CONFIG_PL2303_VENDORID 0x067b
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#endif
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#ifndef CONFIG_PL2303_PRODUCTID
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# define CONFIG_PL2303_PRODUCTID 0x2303
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#endif
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#ifndef CONFIG_PL2303_VENDORSTR
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# warning "No Vendor string specified"
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# define CONFIG_PL2303_VENDORSTR "NuttX"
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#endif
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#ifndef CONFIG_PL2303_PRODUCTSTR
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# warning "No Product string specified"
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# define CONFIG_PL2303_PRODUCTSTR "USBdev Serial"
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#endif
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#undef CONFIG_PL2303_SERIALSTR
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#define CONFIG_PL2303_SERIALSTR "0"
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#undef CONFIG_PL2303_CONFIGSTR
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#define CONFIG_PL2303_CONFIGSTR "Bulk"
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/* USB Controller */
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#ifndef CONFIG_USBDEV_SELFPOWERED
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# define SELFPOWERED USB_CONFIG_ATT_SELFPOWER
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#else
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# define SELFPOWERED (0)
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#endif
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#ifndef CONFIG_USBDEV_REMOTEWAKEUP
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# define REMOTEWAKEUP USB_CONFIG_ATTR_WAKEUP
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#else
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# define REMOTEWAKEUP (0)
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#endif
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#ifndef CONFIG_USBDEV_MAXPOWER
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# define CONFIG_USBDEV_MAXPOWER 100
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#endif
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/* Descriptors ****************************************************************/
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/* These settings are not modifiable via the NuttX configuration */
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#define PL2303_VERSIONNO (0x0202) /* Device version number */
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#define PL2303_CONFIGIDNONE (0) /* Config ID means to return to address mode */
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#define PL2303_CONFIGID (1) /* The only supported configuration ID */
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#define PL2303_NCONFIGS (1) /* Number of configurations supported */
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#define PL2303_INTERFACEID (0)
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#define PL2303_ALTINTERFACEID (0)
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#define PL2303_NINTERFACES (1) /* Number of interfaces in the configuration */
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#define PL2303_NENDPOINTS (3) /* Number of endpoints in the interface */
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/* Endpoint configuration */
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#define PL2303_EPINTIN_ADDR (USB_DIR_IN|CONFIG_PL2303_EPINTIN)
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#define PL2303_EPINTIN_ATTR (USB_EP_ATTR_XFER_INT)
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#define PL2303_EPINTIN_MXPACKET (10)
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#define PL2303_EPOUTBULK_ADDR (CONFIG_PL2303_EPBULKOUT)
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#define PL2303_EPOUTBULK_ATTR (USB_EP_ATTR_XFER_BULK)
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#define PL2303_EPINBULK_ADDR (USB_DIR_IN|CONFIG_PL2303_EPBULKIN)
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#define PL2303_EPINBULK_ATTR (USB_EP_ATTR_XFER_BULK)
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/* String language */
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#define PL2303_STR_LANGUAGE (0x0409) /* en-us */
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/* Descriptor strings */
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#define PL2303_MANUFACTURERSTRID (1)
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#define PL2303_PRODUCTSTRID (2)
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#define PL2303_SERIALSTRID (3)
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#define PL2303_CONFIGSTRID (4)
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/* Buffer big enough for any of our descriptors */
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#define PL2303_MXDESCLEN (64)
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/* Vender specific control requests *******************************************/
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#define PL2303_CONTROL_TYPE (0x20)
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#define PL2303_SETLINEREQUEST (0x20) /* OUT, Recipient interface */
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#define PL2303_GETLINEREQUEST (0x21) /* IN, Recipient interface */
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#define PL2303_SETCONTROLREQUEST (0x22) /* OUT, Recipient interface */
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#define PL2303_BREAKREQUEST (0x23) /* OUT, Recipient interface */
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/* Vendor read/write */
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#define PL2303_RWREQUEST_TYPE (0x40)
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#define PL2303_RWREQUEST (0x01) /* IN/OUT, Recipient device */
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/* Misc Macros ****************************************************************/
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/* min/max macros */
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#ifndef min
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# define min(a,b) ((a)<(b)?(a):(b))
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#endif
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#ifndef max
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# define max(a,b) ((a)>(b)?(a):(b))
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#endif
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/* Trace values *************************************************************/
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#define PL2303_CLASSAPI_SETUP TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_SETUP)
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#define PL2303_CLASSAPI_SHUTDOWN TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_SHUTDOWN)
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#define PL2303_CLASSAPI_ATTACH TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_ATTACH)
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#define PL2303_CLASSAPI_DETACH TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_DETACH)
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#define PL2303_CLASSAPI_IOCTL TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_IOCTL)
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#define PL2303_CLASSAPI_RECEIVE TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_RECEIVE)
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#define PL2303_CLASSAPI_RXINT TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_RXINT)
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#define PL2303_CLASSAPI_RXAVAILABLE TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_RXAVAILABLE)
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#define PL2303_CLASSAPI_SEND TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_SEND)
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#define PL2303_CLASSAPI_TXINT TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_TXINT)
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#define PL2303_CLASSAPI_TXREADY TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_TXREADY)
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#define PL2303_CLASSAPI_TXEMPTY TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_TXEMPTY)
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/* Container to support a list of requests */
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struct pl2303_req_s
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{
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FAR struct pl2303_req_s *flink; /* Implements a singly linked list */
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FAR struct usbdev_req_s *req; /* The contained request */
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};
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/* This structure describes the internal state of the driver */
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struct pl2303_dev_s
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{
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FAR struct uart_dev_s serdev; /* Serial device structure */
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FAR struct usbdev_s *usbdev; /* usbdev driver pointer */
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uint8_t config; /* Configuration number */
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uint8_t nwrq; /* Number of queue write requests (in reqlist)*/
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uint8_t nrdq; /* Number of queue read requests (in epbulkout) */
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bool rxenabled; /* true: UART RX "interrupts" enabled */
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uint8_t linest[7]; /* Fake line status */
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int16_t rxhead; /* Working head; used when rx int disabled */
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FAR struct usbdev_ep_s *epintin; /* Interrupt IN endpoint structure */
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FAR struct usbdev_ep_s *epbulkin; /* Bulk IN endpoint structure */
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FAR struct usbdev_ep_s *epbulkout; /* Bulk OUT endpoint structure */
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FAR struct usbdev_req_s *ctrlreq; /* Control request */
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struct sq_queue_s reqlist; /* List of write request containers */
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/* Pre-allocated write request containers. The write requests will
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* be linked in a free list (reqlist), and used to send requests to
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* EPBULKIN; Read requests will be queued in the EBULKOUT.
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*/
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struct pl2303_req_s wrreqs[CONFIG_PL2303_NWRREQS];
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struct pl2303_req_s rdreqs[CONFIG_PL2303_NWRREQS];
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/* Serial I/O buffers */
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char rxbuffer[CONFIG_PL2303_RXBUFSIZE];
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char txbuffer[CONFIG_PL2303_TXBUFSIZE];
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};
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/* The internal version of the class driver */
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struct pl2303_driver_s
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{
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struct usbdevclass_driver_s drvr;
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FAR struct pl2303_dev_s *dev;
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};
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/* This is what is allocated */
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struct pl2303_alloc_s
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{
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struct pl2303_dev_s dev;
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struct pl2303_driver_s drvr;
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/* Transfer helpers *********************************************************/
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static uint16_t usbclass_fillrequest(FAR struct pl2303_dev_s *priv,
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uint8_t *reqbuf, uint16_t reqlen);
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static int usbclass_sndpacket(FAR struct pl2303_dev_s *priv);
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static inline int usbclass_recvpacket(FAR struct pl2303_dev_s *priv,
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uint8_t *reqbuf, uint16_t reqlen);
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/* Request helpers *********************************************************/
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static struct usbdev_req_s *usbclass_allocreq(FAR struct usbdev_ep_s *ep,
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uint16_t len);
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static void usbclass_freereq(FAR struct usbdev_ep_s *ep,
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FAR struct usbdev_req_s *req);
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/* Configuration ***********************************************************/
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static int usbclass_mkstrdesc(uint8_t id, struct usb_strdesc_s *strdesc);
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#ifdef CONFIG_USBDEV_DUALSPEED
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static void usbclass_mkepbulkdesc(const struct usb_epdesc_s *indesc,
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uint16_t mxpacket, struct usb_epdesc_s *outdesc);
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static int16_t usbclass_mkcfgdesc(uint8_t *buf, uint8_t speed, uint8_t type);
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#else
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static int16_t usbclass_mkcfgdesc(uint8_t *buf);
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#endif
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static void usbclass_resetconfig(FAR struct pl2303_dev_s *priv);
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static int usbclass_setconfig(FAR struct pl2303_dev_s *priv,
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uint8_t config);
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/* Completion event handlers ***********************************************/
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static void usbclass_ep0incomplete(FAR struct usbdev_ep_s *ep,
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FAR struct usbdev_req_s *req);
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static void usbclass_rdcomplete(FAR struct usbdev_ep_s *ep,
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FAR struct usbdev_req_s *req);
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static void usbclass_wrcomplete(FAR struct usbdev_ep_s *ep,
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FAR struct usbdev_req_s *req);
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/* USB class device ********************************************************/
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static int usbclass_bind(FAR struct usbdevclass_driver_s *driver,
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FAR struct usbdev_s *dev);
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static void usbclass_unbind(FAR struct usbdevclass_driver_s *driver,
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FAR struct usbdev_s *dev);
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static int usbclass_setup(FAR struct usbdevclass_driver_s *driver,
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FAR struct usbdev_s *dev,
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FAR const struct usb_ctrlreq_s *ctrl, FAR uint8_t *dataout,
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size_t outlen);
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static void usbclass_disconnect(FAR struct usbdevclass_driver_s *driver,
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FAR struct usbdev_s *dev);
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/* Serial port *************************************************************/
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static int usbser_setup(FAR struct uart_dev_s *dev);
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static void usbser_shutdown(FAR struct uart_dev_s *dev);
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static int usbser_attach(FAR struct uart_dev_s *dev);
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static void usbser_detach(FAR struct uart_dev_s *dev);
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static void usbser_rxint(FAR struct uart_dev_s *dev, bool enable);
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static void usbser_txint(FAR struct uart_dev_s *dev, bool enable);
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static bool usbser_txempty(FAR struct uart_dev_s *dev);
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/****************************************************************************
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* Private Variables
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****************************************************************************/
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/* USB class device ********************************************************/
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static const struct usbdevclass_driverops_s g_driverops =
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{
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usbclass_bind, /* bind */
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usbclass_unbind, /* unbind */
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usbclass_setup, /* setup */
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usbclass_disconnect, /* disconnect */
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NULL, /* suspend */
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NULL, /* resume */
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};
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/* Serial port *************************************************************/
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static const struct uart_ops_s g_uartops =
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{
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usbser_setup, /* setup */
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usbser_shutdown, /* shutdown */
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usbser_attach, /* attach */
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usbser_detach, /* detach */
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NULL, /* ioctl */
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NULL, /* receive */
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usbser_rxint, /* rxinit */
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NULL, /* rxavailable */
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NULL, /* send */
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usbser_txint, /* txinit */
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NULL, /* txready */
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usbser_txempty /* txempty */
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};
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/* USB descriptor templates these will be copied and modified **************/
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static const struct usb_devdesc_s g_devdesc =
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{
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USB_SIZEOF_DEVDESC, /* len */
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USB_DESC_TYPE_DEVICE, /* type */
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{LSBYTE(0x0200), MSBYTE(0x0200)}, /* usb */
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USB_CLASS_PER_INTERFACE, /* classid */
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0, /* subclass */
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0, /* protocol */
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CONFIG_PL2303_EP0MAXPACKET, /* maxpacketsize */
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{ LSBYTE(CONFIG_PL2303_VENDORID), /* vendor */
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MSBYTE(CONFIG_PL2303_VENDORID) },
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{ LSBYTE(CONFIG_PL2303_PRODUCTID), /* product */
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MSBYTE(CONFIG_PL2303_PRODUCTID) },
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{ LSBYTE(PL2303_VERSIONNO), /* device */
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MSBYTE(PL2303_VERSIONNO) },
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PL2303_MANUFACTURERSTRID, /* imfgr */
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PL2303_PRODUCTSTRID, /* iproduct */
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PL2303_SERIALSTRID, /* serno */
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PL2303_NCONFIGS /* nconfigs */
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};
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static const struct usb_cfgdesc_s g_cfgdesc =
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{
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USB_SIZEOF_CFGDESC, /* len */
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USB_DESC_TYPE_CONFIG, /* type */
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{0, 0}, /* totallen -- to be provided */
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PL2303_NINTERFACES, /* ninterfaces */
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PL2303_CONFIGID, /* cfgvalue */
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PL2303_CONFIGSTRID, /* icfg */
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USB_CONFIG_ATTR_ONE|SELFPOWERED|REMOTEWAKEUP, /* attr */
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(CONFIG_USBDEV_MAXPOWER + 1) / 2 /* mxpower */
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};
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static const struct usb_ifdesc_s g_ifdesc =
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{
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USB_SIZEOF_IFDESC, /* len */
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USB_DESC_TYPE_INTERFACE, /* type */
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0, /* ifno */
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0, /* alt */
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PL2303_NENDPOINTS, /* neps */
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USB_CLASS_VENDOR_SPEC, /* classid */
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0, /* subclass */
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0, /* protocol */
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PL2303_CONFIGSTRID /* iif */
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};
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static const struct usb_epdesc_s g_epintindesc =
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{
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USB_SIZEOF_EPDESC, /* len */
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USB_DESC_TYPE_ENDPOINT, /* type */
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PL2303_EPINTIN_ADDR, /* addr */
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PL2303_EPINTIN_ATTR, /* attr */
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{ LSBYTE(PL2303_EPINTIN_MXPACKET), /* maxpacket */
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MSBYTE(PL2303_EPINTIN_MXPACKET) },
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1 /* interval */
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};
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static const struct usb_epdesc_s g_epbulkoutdesc =
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{
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USB_SIZEOF_EPDESC, /* len */
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USB_DESC_TYPE_ENDPOINT, /* type */
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PL2303_EPOUTBULK_ADDR, /* addr */
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PL2303_EPOUTBULK_ATTR, /* attr */
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{ LSBYTE(64), MSBYTE(64) }, /* maxpacket -- might change to 512*/
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0 /* interval */
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};
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static const struct usb_epdesc_s g_epbulkindesc =
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{
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USB_SIZEOF_EPDESC, /* len */
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USB_DESC_TYPE_ENDPOINT, /* type */
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PL2303_EPINBULK_ADDR, /* addr */
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PL2303_EPINBULK_ATTR, /* attr */
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{ LSBYTE(64), MSBYTE(64) }, /* maxpacket -- might change to 512*/
|
|
0 /* interval */
|
|
};
|
|
|
|
#ifdef CONFIG_USBDEV_DUALSPEED
|
|
static const struct usb_qualdesc_s g_qualdesc =
|
|
{
|
|
USB_SIZEOF_QUALDESC, /* len */
|
|
USB_DESC_TYPE_DEVICEQUALIFIER, /* type */
|
|
{LSBYTE(0x0200), MSBYTE(0x0200) }, /* USB */
|
|
USB_CLASS_VENDOR_SPEC, /* classid */
|
|
0, /* subclass */
|
|
0, /* protocol */
|
|
CONFIG_PL2303_EP0MAXPACKET, /* mxpacketsize */
|
|
PL2303_NCONFIGS, /* nconfigs */
|
|
0, /* reserved */
|
|
};
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/************************************************************************************
|
|
* Name: usbclass_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 usbclass_fillrequest(FAR struct pl2303_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: usbclass_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 not further data
|
|
* to send.
|
|
*
|
|
************************************************************************************/
|
|
|
|
static int usbclass_sndpacket(FAR struct pl2303_dev_s *priv)
|
|
{
|
|
FAR struct usbdev_ep_s *ep;
|
|
FAR struct usbdev_req_s *req;
|
|
FAR struct pl2303_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) usbclass_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_PL2303_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 pl2303_req_s *)sq_peek(&priv->reqlist);
|
|
req = reqcontainer->req;
|
|
|
|
/* Fill the request with serial TX data */
|
|
|
|
len = usbclass_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: usbclass_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 usbclass_recvpacket(FAR struct pl2303_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;
|
|
|
|
/* 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: usbclass_allocreq
|
|
*
|
|
* Description:
|
|
* Allocate a request instance along with its buffer
|
|
*
|
|
****************************************************************************/
|
|
|
|
static struct usbdev_req_s *usbclass_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: usbclass_freereq
|
|
*
|
|
* Description:
|
|
* Free a request instance along with its buffer
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void usbclass_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: usbclass_mkstrdesc
|
|
*
|
|
* Description:
|
|
* Construct a string descriptor
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int usbclass_mkstrdesc(uint8_t id, struct usb_strdesc_s *strdesc)
|
|
{
|
|
const char *str;
|
|
int len;
|
|
int ndata;
|
|
int i;
|
|
|
|
switch (id)
|
|
{
|
|
case 0:
|
|
{
|
|
/* Descriptor 0 is the language id */
|
|
|
|
strdesc->len = 4;
|
|
strdesc->type = USB_DESC_TYPE_STRING;
|
|
strdesc->data[0] = LSBYTE(PL2303_STR_LANGUAGE);
|
|
strdesc->data[1] = MSBYTE(PL2303_STR_LANGUAGE);
|
|
return 4;
|
|
}
|
|
|
|
case PL2303_MANUFACTURERSTRID:
|
|
str = CONFIG_PL2303_VENDORSTR;
|
|
break;
|
|
|
|
case PL2303_PRODUCTSTRID:
|
|
str = CONFIG_PL2303_PRODUCTSTR;
|
|
break;
|
|
|
|
case PL2303_SERIALSTRID:
|
|
str = CONFIG_PL2303_SERIALSTR;
|
|
break;
|
|
|
|
case PL2303_CONFIGSTRID:
|
|
str = CONFIG_PL2303_CONFIGSTR;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* The string is utf16-le. The poor man's utf-8 to utf16-le
|
|
* conversion below will only handle 7-bit en-us ascii
|
|
*/
|
|
|
|
len = strlen(str);
|
|
for (i = 0, ndata = 0; i < len; i++, ndata += 2)
|
|
{
|
|
strdesc->data[ndata] = str[i];
|
|
strdesc->data[ndata+1] = 0;
|
|
}
|
|
|
|
strdesc->len = ndata+2;
|
|
strdesc->type = USB_DESC_TYPE_STRING;
|
|
return strdesc->len;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbclass_mkepbulkdesc
|
|
*
|
|
* Description:
|
|
* Construct the endpoint descriptor
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_USBDEV_DUALSPEED
|
|
static inline void usbclass_mkepbulkdesc(const FAR struct usb_epdesc_s *indesc,
|
|
uint16_t mxpacket,
|
|
FAR struct usb_epdesc_s *outdesc)
|
|
{
|
|
/* Copy the canned descriptor */
|
|
|
|
memcpy(outdesc, indesc, USB_SIZEOF_EPDESC);
|
|
|
|
/* Then add the correct max packet size */
|
|
|
|
outdesc->mxpacketsize[0] = LSBYTE(mxpacket);
|
|
outdesc->mxpacketsize[1] = MSBYTE(mxpacket);
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: usbclass_mkcfgdesc
|
|
*
|
|
* Description:
|
|
* Construct the configuration descriptor
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_USBDEV_DUALSPEED
|
|
static int16_t usbclass_mkcfgdesc(uint8_t *buf, uint8_t speed, uint8_t type)
|
|
#else
|
|
static int16_t usbclass_mkcfgdesc(uint8_t *buf)
|
|
#endif
|
|
{
|
|
FAR struct usb_cfgdesc_s *cfgdesc = (struct usb_cfgdesc_s*)buf;
|
|
#ifdef CONFIG_USBDEV_DUALSPEED
|
|
bool hispeed = (speed == USB_SPEED_HIGH);
|
|
uint16_t bulkmxpacket;
|
|
#endif
|
|
uint16_t totallen;
|
|
|
|
/* This is the total length of the configuration (not necessarily the
|
|
* size that we will be sending now.
|
|
*/
|
|
|
|
totallen = USB_SIZEOF_CFGDESC + USB_SIZEOF_IFDESC + PL2303_NENDPOINTS * USB_SIZEOF_EPDESC;
|
|
|
|
/* Configuration descriptor -- Copy the canned descriptor and fill in the
|
|
* type (we'll also need to update the size below
|
|
*/
|
|
|
|
memcpy(cfgdesc, &g_cfgdesc, USB_SIZEOF_CFGDESC);
|
|
buf += USB_SIZEOF_CFGDESC;
|
|
|
|
/* Copy the canned interface descriptor */
|
|
|
|
memcpy(buf, &g_ifdesc, USB_SIZEOF_IFDESC);
|
|
buf += USB_SIZEOF_IFDESC;
|
|
|
|
/* Make the three endpoint configurations. First, check for switches
|
|
* between high and full speed
|
|
*/
|
|
|
|
#ifdef CONFIG_USBDEV_DUALSPEED
|
|
if (type == USB_DESC_TYPE_OTHERSPEEDCONFIG)
|
|
{
|
|
hispeed = !hispeed;
|
|
}
|
|
#endif
|
|
|
|
memcpy(buf, &g_epintindesc, USB_SIZEOF_EPDESC);
|
|
buf += USB_SIZEOF_EPDESC;
|
|
|
|
#ifdef CONFIG_USBDEV_DUALSPEED
|
|
if (hispeed)
|
|
{
|
|
bulkmxpacket = 512;
|
|
}
|
|
else
|
|
{
|
|
bulkmxpacket = 64;
|
|
}
|
|
|
|
usbclass_mkepbulkdesc(&g_epbulkoutdesc, bulkmxpacket, (struct usb_epdesc_s*)buf);
|
|
buf += USB_SIZEOF_EPDESC;
|
|
usbclass_mkepbulkdesc(&g_epbulkindesc, bulkmxpacket, (struct usb_epdesc_s*)buf);
|
|
#else
|
|
memcpy(buf, &g_epbulkoutdesc, USB_SIZEOF_EPDESC);
|
|
buf += USB_SIZEOF_EPDESC;
|
|
memcpy(buf, &g_epbulkindesc, USB_SIZEOF_EPDESC);
|
|
#endif
|
|
|
|
/* Finally, fill in the total size of the configuration descriptor */
|
|
|
|
cfgdesc->totallen[0] = LSBYTE(totallen);
|
|
cfgdesc->totallen[1] = MSBYTE(totallen);
|
|
return totallen;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbclass_resetconfig
|
|
*
|
|
* Description:
|
|
* Mark the device as not configured and disable all endpoints.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void usbclass_resetconfig(FAR struct pl2303_dev_s *priv)
|
|
{
|
|
/* Are we configured? */
|
|
|
|
if (priv->config != PL2303_CONFIGIDNONE)
|
|
{
|
|
/* Yes.. but not anymore */
|
|
|
|
priv->config = PL2303_CONFIGIDNONE;
|
|
|
|
/* Disable endpoints. This should force completion of all pending
|
|
* transfers.
|
|
*/
|
|
|
|
EP_DISABLE(priv->epintin);
|
|
EP_DISABLE(priv->epbulkin);
|
|
EP_DISABLE(priv->epbulkout);
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbclass_setconfig
|
|
*
|
|
* Description:
|
|
* Set the device configuration by allocating and configuring endpoints and
|
|
* by allocating and queue read and write requests.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int usbclass_setconfig(FAR struct pl2303_dev_s *priv, uint8_t config)
|
|
{
|
|
FAR struct usbdev_req_s *req;
|
|
#ifdef CONFIG_USBDEV_DUALSPEED
|
|
struct usb_epdesc_s epdesc;
|
|
uint16_t bulkmxpacket;
|
|
#endif
|
|
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 */
|
|
|
|
usbclass_resetconfig(priv);
|
|
|
|
/* Was this a request to simply discard the current configuration? */
|
|
|
|
if (config == PL2303_CONFIGIDNONE)
|
|
{
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_CONFIGNONE), 0);
|
|
return 0;
|
|
}
|
|
|
|
/* We only accept one configuration */
|
|
|
|
if (config != PL2303_CONFIGID)
|
|
{
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_CONFIGIDBAD), 0);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Configure the IN interrupt endpoint */
|
|
|
|
ret = EP_CONFIGURE(priv->epintin, &g_epintindesc, 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)
|
|
{
|
|
bulkmxpacket = 512;
|
|
}
|
|
else
|
|
{
|
|
bulkmxpacket = 64;
|
|
}
|
|
|
|
usbclass_mkepbulkdesc(&g_epbulkindesc, bulkmxpacket, &epdesc);
|
|
ret = EP_CONFIGURE(priv->epbulkin, &epdesc, false);
|
|
#else
|
|
ret = EP_CONFIGURE(priv->epbulkin, &g_epbulkindesc, false);
|
|
#endif
|
|
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
|
|
usbclass_mkepbulkdesc(&g_epbulkoutdesc, bulkmxpacket, &epdesc);
|
|
ret = EP_CONFIGURE(priv->epbulkout, &epdesc, true);
|
|
#else
|
|
ret = EP_CONFIGURE(priv->epbulkout, &g_epbulkoutdesc, true);
|
|
#endif
|
|
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_PL2303_NRDREQS; i++)
|
|
{
|
|
req = priv->rdreqs[i].req;
|
|
req->callback = usbclass_rdcomplete;
|
|
ret = EP_SUBMIT(priv->epbulkout, req);
|
|
if (ret != OK)
|
|
{
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_RDSUBMIT), (uint16_t)-ret);
|
|
goto errout;
|
|
}
|
|
priv->nrdq++;
|
|
}
|
|
|
|
priv->config = config;
|
|
return OK;
|
|
|
|
errout:
|
|
usbclass_resetconfig(priv);
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbclass_ep0incomplete
|
|
*
|
|
* Description:
|
|
* Handle completion of EP0 control operations
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void usbclass_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: usbclass_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 usbclass_rdcomplete(FAR struct usbdev_ep_s *ep,
|
|
FAR struct usbdev_req_s *req)
|
|
{
|
|
FAR struct pl2303_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 pl2303_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);
|
|
usbclass_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_PL2303_BULKREQLEN
|
|
req->len = max(CONFIG_PL2303_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: usbclass_wrcomplete
|
|
*
|
|
* Description:
|
|
* Handle completion of write request. This function probably executes
|
|
* in the context of an interrupt handler.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void usbclass_wrcomplete(FAR struct usbdev_ep_s *ep,
|
|
FAR struct usbdev_req_s *req)
|
|
{
|
|
FAR struct pl2303_dev_s *priv;
|
|
FAR struct pl2303_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 pl2303_dev_s *)ep->priv;
|
|
reqcontainer = (FAR struct pl2303_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);
|
|
usbclass_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: usbclass_bind
|
|
*
|
|
* Description:
|
|
* Invoked when the driver is bound to a USB device driver
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int usbclass_bind(FAR struct usbdevclass_driver_s *driver,
|
|
FAR struct usbdev_s *dev)
|
|
{
|
|
FAR struct pl2303_dev_s *priv = ((FAR struct pl2303_driver_s*)driver)->dev;
|
|
FAR struct pl2303_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).
|
|
*/
|
|
|
|
dev->ep0->priv = priv;
|
|
|
|
/* Preallocate control request */
|
|
|
|
priv->ctrlreq = usbclass_allocreq(dev->ep0, PL2303_MXDESCLEN);
|
|
if (priv->ctrlreq == NULL)
|
|
{
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_ALLOCCTRLREQ), 0);
|
|
ret = -ENOMEM;
|
|
goto errout;
|
|
}
|
|
priv->ctrlreq->callback = usbclass_ep0incomplete;
|
|
|
|
/* Pre-allocate all endpoints... the endpoints will not be functional
|
|
* until the SET CONFIGURATION request is processed in usbclass_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, PL2303_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, PL2303_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, PL2303_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_PL2303_BULKREQLEN
|
|
reqlen = max(CONFIG_PL2303_BULKREQLEN, priv->epbulkout->maxpacket);
|
|
#else
|
|
reqlen = priv->epbulkout->maxpacket;
|
|
#endif
|
|
|
|
for (i = 0; i < CONFIG_PL2303_NRDREQS; i++)
|
|
{
|
|
reqcontainer = &priv->rdreqs[i];
|
|
reqcontainer->req = usbclass_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 = usbclass_rdcomplete;
|
|
}
|
|
|
|
/* Pre-allocate write request containers and put in a free list */
|
|
|
|
#ifdef CONFIG_PL2303_BULKREQLEN
|
|
reqlen = max(CONFIG_PL2303_BULKREQLEN, priv->epbulkin->maxpacket);
|
|
#else
|
|
reqlen = priv->epbulkin->maxpacket;
|
|
#endif
|
|
|
|
for (i = 0; i < CONFIG_PL2303_NWRREQS; i++)
|
|
{
|
|
reqcontainer = &priv->wrreqs[i];
|
|
reqcontainer->req = usbclass_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 = usbclass_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 */
|
|
|
|
#ifdef CONFIG_USBDEV_SELFPOWERED
|
|
DEV_SETSELFPOWERED(dev);
|
|
#endif
|
|
|
|
/* And pull-up the data line for the soft connect function */
|
|
|
|
DEV_CONNECT(dev);
|
|
return OK;
|
|
|
|
errout:
|
|
usbclass_unbind(driver, dev);
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbclass_unbind
|
|
*
|
|
* Description:
|
|
* Invoked when the driver is unbound from a USB device driver
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void usbclass_unbind(FAR struct usbdevclass_driver_s *driver,
|
|
FAR struct usbdev_s *dev)
|
|
{
|
|
FAR struct pl2303_dev_s *priv;
|
|
FAR struct pl2303_req_s *reqcontainer;
|
|
irqstate_t flags;
|
|
int i;
|
|
|
|
usbtrace(TRACE_CLASSUNBIND, 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 pl2303_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 usbclass_resetconfig
|
|
* should cause the endpoints to immediately terminate all
|
|
* transfers and return the requests to us (with result == -ESHUTDOWN)
|
|
*/
|
|
|
|
usbclass_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)
|
|
{
|
|
usbclass_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_PL2303_NRDREQS; i++)
|
|
{
|
|
reqcontainer = &priv->rdreqs[i];
|
|
if (reqcontainer->req)
|
|
{
|
|
usbclass_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_PL2303_NWRREQS);
|
|
while (!sq_empty(&priv->reqlist))
|
|
{
|
|
reqcontainer = (struct pl2303_req_s *)sq_remfirst(&priv->reqlist);
|
|
if (reqcontainer->req != NULL)
|
|
{
|
|
usbclass_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: usbclass_setup
|
|
*
|
|
* Description:
|
|
* Invoked for ep0 control requests. This function probably executes
|
|
* in the context of an interrupt handler.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int usbclass_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 pl2303_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 || !dev->ep0 || !ctrl)
|
|
{
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0);
|
|
return -EIO;
|
|
}
|
|
#endif
|
|
|
|
/* Extract reference to private data */
|
|
|
|
usbtrace(TRACE_CLASSSETUP, ctrl->req);
|
|
priv = ((FAR struct pl2303_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);
|
|
|
|
switch (ctrl->type & USB_REQ_TYPE_MASK)
|
|
{
|
|
/***********************************************************************
|
|
* Standard Requests
|
|
***********************************************************************/
|
|
|
|
case USB_REQ_TYPE_STANDARD:
|
|
{
|
|
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])
|
|
{
|
|
case USB_DESC_TYPE_DEVICE:
|
|
{
|
|
ret = USB_SIZEOF_DEVDESC;
|
|
memcpy(ctrlreq->buf, &g_devdesc, ret);
|
|
}
|
|
break;
|
|
|
|
#ifdef CONFIG_USBDEV_DUALSPEED
|
|
case USB_DESC_TYPE_DEVICEQUALIFIER:
|
|
{
|
|
ret = USB_SIZEOF_QUALDESC;
|
|
memcpy(ctrlreq->buf, &g_qualdesc, ret);
|
|
}
|
|
break;
|
|
|
|
case USB_DESC_TYPE_OTHERSPEEDCONFIG:
|
|
#endif /* CONFIG_USBDEV_DUALSPEED */
|
|
|
|
case USB_DESC_TYPE_CONFIG:
|
|
{
|
|
#ifdef CONFIG_USBDEV_DUALSPEED
|
|
ret = usbclass_mkcfgdesc(ctrlreq->buf, dev->speed, ctrl->req);
|
|
#else
|
|
ret = usbclass_mkcfgdesc(ctrlreq->buf);
|
|
#endif
|
|
}
|
|
break;
|
|
|
|
case USB_DESC_TYPE_STRING:
|
|
{
|
|
/* index == language code. */
|
|
|
|
ret = usbclass_mkstrdesc(ctrl->value[0], (struct usb_strdesc_s *)ctrlreq->buf);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
{
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_GETUNKNOWNDESC), value);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case USB_REQ_SETCONFIGURATION:
|
|
{
|
|
if (ctrl->type == 0)
|
|
{
|
|
ret = usbclass_setconfig(priv, value);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case USB_REQ_GETCONFIGURATION:
|
|
{
|
|
if (ctrl->type == USB_DIR_IN)
|
|
{
|
|
*(uint8_t*)ctrlreq->buf = priv->config;
|
|
ret = 1;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case USB_REQ_SETINTERFACE:
|
|
{
|
|
if (ctrl->type == USB_REQ_RECIPIENT_INTERFACE)
|
|
{
|
|
if (priv->config == PL2303_CONFIGID &&
|
|
index == PL2303_INTERFACEID &&
|
|
value == PL2303_ALTINTERFACEID)
|
|
{
|
|
usbclass_resetconfig(priv);
|
|
usbclass_setconfig(priv, priv->config);
|
|
ret = 0;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case USB_REQ_GETINTERFACE:
|
|
{
|
|
if (ctrl->type == (USB_DIR_IN|USB_REQ_RECIPIENT_INTERFACE) &&
|
|
priv->config == PL2303_CONFIGIDNONE)
|
|
{
|
|
if (index != PL2303_INTERFACEID)
|
|
{
|
|
ret = -EDOM;
|
|
}
|
|
else
|
|
{
|
|
*(uint8_t*) ctrlreq->buf = PL2303_ALTINTERFACEID;
|
|
ret = 1;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_UNSUPPORTEDSTDREQ), ctrl->req);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
/***********************************************************************
|
|
* PL2303 Vendor-Specific Requests
|
|
***********************************************************************/
|
|
|
|
case PL2303_CONTROL_TYPE:
|
|
{
|
|
if ((ctrl->type & USB_REQ_RECIPIENT_MASK) == USB_REQ_RECIPIENT_INTERFACE)
|
|
{
|
|
switch (ctrl->req)
|
|
{
|
|
case PL2303_SETLINEREQUEST:
|
|
{
|
|
memcpy(priv->linest, ctrlreq->buf, min(len, 7));
|
|
ret = 0;
|
|
}
|
|
break;
|
|
|
|
|
|
case PL2303_GETLINEREQUEST:
|
|
{
|
|
memcpy(ctrlreq->buf, priv->linest, 7);
|
|
ret = 7;
|
|
}
|
|
break;
|
|
|
|
case PL2303_SETCONTROLREQUEST:
|
|
case PL2303_BREAKREQUEST:
|
|
{
|
|
ret = 0;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_UNSUPPORTEDCLASSREQ), ctrl->type);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case PL2303_RWREQUEST_TYPE:
|
|
{
|
|
if ((ctrl->type & USB_REQ_RECIPIENT_MASK) == USB_REQ_RECIPIENT_DEVICE)
|
|
{
|
|
if (ctrl->req == PL2303_RWREQUEST)
|
|
{
|
|
if ((ctrl->type & USB_DIR_IN) != 0)
|
|
{
|
|
*(uint32_t*)ctrlreq->buf = 0xdeadbeef;
|
|
ret = 4;
|
|
}
|
|
else
|
|
{
|
|
ret = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_UNSUPPORTEDCLASSREQ), ctrl->type);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_UNSUPPORTEDTYPE), ctrl->type);
|
|
break;
|
|
}
|
|
|
|
/* Respond to the setup command if data was returned. On an error return
|
|
* value (ret < 0), the USB driver will stall.
|
|
*/
|
|
|
|
if (ret >= 0)
|
|
{
|
|
ctrlreq->len = min(len, ret);
|
|
ctrlreq->flags = USBDEV_REQFLAGS_NULLPKT;
|
|
ret = EP_SUBMIT(dev->ep0, ctrlreq);
|
|
if (ret < 0)
|
|
{
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_EPRESPQ), (uint16_t)-ret);
|
|
ctrlreq->result = OK;
|
|
usbclass_ep0incomplete(dev->ep0, ctrlreq);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbclass_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 usbclass_disconnect(FAR struct usbdevclass_driver_s *driver,
|
|
FAR struct usbdev_s *dev)
|
|
{
|
|
FAR struct pl2303_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 pl2303_driver_s*)driver)->dev;
|
|
|
|
#ifdef CONFIG_DEBUG
|
|
if (!priv)
|
|
{
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_EP0NOTBOUND), 0);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
/* Reset the configuration */
|
|
|
|
flags = irqsave();
|
|
usbclass_resetconfig(priv);
|
|
|
|
/* Clear out all 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.
|
|
*/
|
|
|
|
DEV_CONNECT(dev);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Serial Device Methods
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: usbser_setup
|
|
*
|
|
* Description:
|
|
* This method is called the first time that the serial port is opened.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int usbser_setup(FAR struct uart_dev_s *dev)
|
|
{
|
|
FAR struct pl2303_dev_s *priv;
|
|
|
|
usbtrace(PL2303_CLASSASPI_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 pl2303_dev_s*)dev->priv;
|
|
|
|
/* Check if we have been configured */
|
|
|
|
if (priv->config == PL2303_CONFIGIDNONE)
|
|
{
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_SETUPNOTCONNECTED), 0);
|
|
return -ENOTCONN;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbser_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
|
|
* usbser_txempty() until that function returns true before calling this
|
|
* function.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void usbser_shutdown(FAR struct uart_dev_s *dev)
|
|
{
|
|
usbtrace(PL2303_CLASSASPI_SHUTDOWN, 0);
|
|
|
|
/* Sanity check */
|
|
|
|
#if CONFIG_DEBUG
|
|
if (!dev || !dev->priv)
|
|
{
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbser_attach
|
|
*
|
|
* Description:
|
|
* Does not apply to the USB serial class device
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int usbser_attach(FAR struct uart_dev_s *dev)
|
|
{
|
|
usbtrace(PL2303_CLASSASPI_ATTACH, 0);
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbser_detach
|
|
*
|
|
* Description:
|
|
* Does not apply to the USB serial class device
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void usbser_detach(FAR struct uart_dev_s *dev)
|
|
{
|
|
usbtrace(PL2303_CLASSASPI_DETACH, 0);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbser_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 usbser_setup
|
|
* and usbser_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 usbser_detach
|
|
* and usbser_shutdown are called).
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void usbser_rxint(FAR struct uart_dev_s *dev, bool enable)
|
|
{
|
|
FAR struct pl2303_dev_s *priv;
|
|
FAR uart_dev_t *serdev;
|
|
irqstate_t flags;
|
|
|
|
usbtrace(PL2303_CLASSASPI_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 pl2303_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: usbser_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 usbser_txint(FAR struct uart_dev_s *dev, bool enable)
|
|
{
|
|
FAR struct pl2303_dev_s *priv;
|
|
|
|
usbtrace(PL2303_CLASSASPI_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 pl2303_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)
|
|
{
|
|
usbclass_sndpacket(priv);
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbser_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 usbser_txempty(FAR struct uart_dev_s *dev)
|
|
{
|
|
FAR struct pl2303_dev_s *priv = (FAR struct pl2303_dev_s*)dev->priv;
|
|
|
|
usbtrace(PL2303_CLASSASPI_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_PL2303_NWRREQS;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: usbdev_serialinitialize
|
|
*
|
|
* Description:
|
|
* Register USB serial port (and USB serial console if so configured).
|
|
*
|
|
****************************************************************************/
|
|
|
|
int usbdev_serialinitialize(int minor)
|
|
{
|
|
FAR struct pl2303_alloc_s *alloc;
|
|
FAR struct pl2303_dev_s *priv;
|
|
FAR struct pl2303_driver_s *drvr;
|
|
char devname[16];
|
|
int ret;
|
|
|
|
/* Allocate the structures needed */
|
|
|
|
alloc = (FAR struct pl2303_alloc_s*)kmalloc(sizeof(struct pl2303_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 pl2303_dev_s));
|
|
sq_init(&priv->reqlist);
|
|
|
|
/* Fake line status */
|
|
|
|
priv->linest[0] = (115200) & 0xff; /* Baud=115200 */
|
|
priv->linest[1] = (115200 >> 8) & 0xff;
|
|
priv->linest[2] = (115200 >> 16) & 0xff;
|
|
priv->linest[3] = (115200 >> 24) & 0xff;
|
|
priv->linest[4] = 0; /* One stop bit */
|
|
priv->linest[5] = 0; /* No parity */
|
|
priv->linest[6] = 8; /*8 data bits */
|
|
|
|
/* Initialize the serial driver sub-structure */
|
|
|
|
priv->serdev.recv.size = CONFIG_PL2303_RXBUFSIZE;
|
|
priv->serdev.recv.buffer = priv->rxbuffer;
|
|
priv->serdev.xmit.size = CONFIG_PL2303_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 class driver */
|
|
|
|
ret = usbdev_register(&drvr->drvr);
|
|
if (ret)
|
|
{
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_DEVREGISTER), (uint16_t)-ret);
|
|
goto errout_with_alloc;
|
|
}
|
|
|
|
/* Register the USB serial console */
|
|
|
|
#ifdef CONFIG_PL2303_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 single port supported by this implementation */
|
|
|
|
sprintf(devname, "/dev/ttyUSB%d", minor);
|
|
ret = uart_register(devname, &priv->serdev);
|
|
if (ret)
|
|
{
|
|
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_UARTREGISTER), (uint16_t)-ret);
|
|
goto errout_with_class;
|
|
}
|
|
return OK;
|
|
|
|
errout_with_class:
|
|
usbdev_unregister(&drvr->drvr);
|
|
errout_with_alloc:
|
|
kfree(alloc);
|
|
return ret;
|
|
}
|