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incubator-nuttx/drivers/usbdev/cdcacm_desc.c

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/****************************************************************************
* drivers/usbdev/cdcacm_desc.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/usb/usb.h>
#include <nuttx/usb/usbdev.h>
#include <nuttx/usb/cdc.h>
#include <nuttx/usb/cdcacm.h>
#include <nuttx/usb/usbdev_trace.h>
#ifdef CONFIG_BOARD_USBDEV_SERIALSTR
#include <nuttx/board.h>
#endif
#include "cdcacm.h"
/****************************************************************************
* Private Data
****************************************************************************/
/* USB descriptor templates these will be copied and modified ***************/
/* Device Descriptor. If the USB serial device is configured as part of
* composite device, then the device descriptor will be provided by the
* composite device logic.
*/
#ifndef CONFIG_CDCACM_COMPOSITE
static const struct usb_devdesc_s g_devdesc =
{
USB_SIZEOF_DEVDESC, /* len */
USB_DESC_TYPE_DEVICE, /* type */
{ /* usb */
LSBYTE(0x0200),
MSBYTE(0x0200)
},
USB_CLASS_CDC, /* class */
CDC_SUBCLASS_NONE, /* subclass */
CDC_PROTO_NONE, /* protocol */
CONFIG_CDCACM_EP0MAXPACKET, /* maxpacketsize */
{
LSBYTE(CONFIG_CDCACM_VENDORID), /* vendor */
MSBYTE(CONFIG_CDCACM_VENDORID)
},
{
LSBYTE(CONFIG_CDCACM_PRODUCTID), /* product */
MSBYTE(CONFIG_CDCACM_PRODUCTID)
},
{
LSBYTE(CDCACM_VERSIONNO), /* device */
MSBYTE(CDCACM_VERSIONNO)
},
CDCACM_MANUFACTURERSTRID, /* imfgr */
CDCACM_PRODUCTSTRID, /* iproduct */
CDCACM_SERIALSTRID, /* serno */
CDCACM_NCONFIGS /* nconfigs */
};
#endif
#if !defined(CONFIG_CDCACM_COMPOSITE) && defined(CONFIG_USBDEV_DUALSPEED)
static const struct usb_qualdesc_s g_qualdesc =
{
USB_SIZEOF_QUALDESC, /* len */
USB_DESC_TYPE_DEVICEQUALIFIER, /* type */
{ /* usb */
LSBYTE(0x0200),
MSBYTE(0x0200)
},
USB_CLASS_VENDOR_SPEC, /* class */
0, /* subclass */
0, /* protocol */
CONFIG_CDCACM_EP0MAXPACKET, /* mxpacketsize */
CDCACM_NCONFIGS, /* nconfigs */
0, /* reserved */
};
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: cdcacm_mkstrdesc
*
* Description:
* Construct a string descriptor
*
****************************************************************************/
int cdcacm_mkstrdesc(uint8_t id, FAR struct usb_strdesc_s *strdesc)
{
#if !defined(CONFIG_CDCACM_COMPOSITE) || defined(CONFIG_CDCACM_NOTIFSTR) || \
defined(CONFIG_CDCACM_DATAIFSTR)
FAR uint8_t *data = (FAR uint8_t *)(strdesc + 1);
FAR const char *str;
int len;
int ndata;
int i;
switch (id)
{
#ifndef CONFIG_CDCACM_COMPOSITE
case 0:
{
/* Descriptor 0 is the language id */
strdesc->len = 4;
strdesc->type = USB_DESC_TYPE_STRING;
data[0] = LSBYTE(CDCACM_STR_LANGUAGE);
data[1] = MSBYTE(CDCACM_STR_LANGUAGE);
return 4;
}
case CDCACM_MANUFACTURERSTRID:
str = CONFIG_CDCACM_VENDORSTR;
break;
case CDCACM_PRODUCTSTRID:
str = CONFIG_CDCACM_PRODUCTSTR;
break;
case CDCACM_SERIALSTRID:
#ifdef CONFIG_BOARD_USBDEV_SERIALSTR
str = board_usbdev_serialstr();
#else
str = CONFIG_CDCACM_SERIALSTR;
#endif
break;
case CDCACM_CONFIGSTRID:
str = CONFIG_CDCACM_CONFIGSTR;
break;
#endif
#ifdef CONFIG_CDCACM_NOTIFSTR
case CDCACM_NOTIFSTRID:
str = CONFIG_CDCACM_NOTIFSTR;
break;
#endif
#ifdef CONFIG_CDCACM_DATAIFSTR
case CDCACM_DATAIFSTRID:
str = CONFIG_CDCACM_DATAIFSTR;
break;
#endif
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);
if (len > (CDCACM_MAXSTRLEN / 2))
{
len = (CDCACM_MAXSTRLEN / 2);
}
for (i = 0, ndata = 0; i < len; i++, ndata += 2)
{
data[ndata] = str[i];
data[ndata + 1] = 0;
}
strdesc->len = ndata + 2;
strdesc->type = USB_DESC_TYPE_STRING;
return strdesc->len;
#else
return -EINVAL;
#endif
}
/****************************************************************************
* Name: cdcacm_getdevdesc
*
* Description:
* Return a pointer to the raw device descriptor
*
****************************************************************************/
#ifndef CONFIG_CDCACM_COMPOSITE
FAR const struct usb_devdesc_s *cdcacm_getdevdesc(void)
{
return &g_devdesc;
}
#endif
/****************************************************************************
* Name: cdcacm_copy_epcompdesc
*
* Description:
* Copies the Endpoint Companion Description into the buffer given.
* Returns the number of Bytes filled in.
*
****************************************************************************/
#ifdef CONFIG_USBDEV_SUPERSPEED
static void
cdcacm_copy_epcompdesc(enum cdcacm_epdesc_e epid,
FAR struct usb_ss_epcompdesc_s *epcompdesc)
{
switch (epid)
{
#ifdef CONFIG_CDCACM_HAVE_EPINTIN
case CDCACM_EPINTIN: /* Interrupt IN endpoint */
{
epcompdesc->len = USB_SIZEOF_SS_EPCOMPDESC; /* Descriptor length */
epcompdesc->type = USB_DESC_TYPE_ENDPOINT_COMPANION; /* Descriptor type */
if (CONFIG_CDCACM_EPINTIN_MAXBURST >= USB_SS_INT_EP_MAXBURST)
{
epcompdesc->mxburst = USB_SS_INT_EP_MAXBURST - 1;
}
else
{
epcompdesc->mxburst = CONFIG_CDCACM_EPINTIN_MAXBURST;
}
epcompdesc->attr = 0;
epcompdesc->wbytes[0] = LSBYTE((epcompdesc->mxburst + 1) *
CONFIG_CDCACM_EPINTIN_SSSIZE);
epcompdesc->wbytes[1] = MSBYTE((epcompdesc->mxburst + 1) *
CONFIG_CDCACM_EPINTIN_SSSIZE);
}
break;
#endif
case CDCACM_EPBULKOUT: /* Bulk OUT endpoint */
{
epcompdesc->len = USB_SIZEOF_SS_EPCOMPDESC; /* Descriptor length */
epcompdesc->type = USB_DESC_TYPE_ENDPOINT_COMPANION; /* Descriptor type */
if (CONFIG_CDCACM_EPBULKOUT_MAXBURST >= USB_SS_BULK_EP_MAXBURST)
{
epcompdesc->mxburst = USB_SS_BULK_EP_MAXBURST - 1;
}
else
{
epcompdesc->mxburst = CONFIG_CDCACM_EPBULKOUT_MAXBURST;
}
if (CONFIG_CDCACM_EPBULKOUT_MAXSTREAM > USB_SS_BULK_EP_MAXSTREAM)
{
epcompdesc->attr = USB_SS_BULK_EP_MAXSTREAM;
}
else
{
epcompdesc->attr = CONFIG_CDCACM_EPBULKOUT_MAXSTREAM;
}
epcompdesc->wbytes[0] = 0;
epcompdesc->wbytes[1] = 0;
}
break;
case CDCACM_EPBULKIN: /* Bulk IN endpoint */
{
epcompdesc->len = USB_SIZEOF_SS_EPCOMPDESC; /* Descriptor length */
epcompdesc->type = USB_DESC_TYPE_ENDPOINT_COMPANION; /* Descriptor type */
if (CONFIG_CDCACM_EPBULKIN_MAXBURST >= USB_SS_BULK_EP_MAXBURST)
{
epcompdesc->mxburst = USB_SS_BULK_EP_MAXBURST - 1;
}
else
{
epcompdesc->mxburst = CONFIG_CDCACM_EPBULKIN_MAXBURST;
}
if (CONFIG_CDCACM_EPBULKIN_MAXSTREAM > USB_SS_BULK_EP_MAXSTREAM)
{
epcompdesc->attr = USB_SS_BULK_EP_MAXSTREAM;
}
else
{
epcompdesc->attr = CONFIG_CDCACM_EPBULKIN_MAXSTREAM;
}
epcompdesc->wbytes[0] = 0;
epcompdesc->wbytes[1] = 0;
}
break;
default:
break;
}
}
#endif
/****************************************************************************
* Name: cdcacm_copy_epdesc
*
* Description:
* Copies the requested Endpoint Description into the buffer given.
* Returns the number of Bytes filled in (sizeof(struct usb_epdesc_s)).
*
****************************************************************************/
int cdcacm_copy_epdesc(enum cdcacm_epdesc_e epid,
FAR struct usb_epdesc_s *epdesc,
FAR struct usbdev_devinfo_s *devinfo,
uint8_t speed)
{
int len = sizeof(struct usb_epdesc_s);
#if !defined(CONFIG_USBDEV_DUALSPEED) && !defined(CONFIG_USBDEV_SUPERSPEED)
UNUSED(speed);
#endif
#ifdef CONFIG_USBDEV_SUPERSPEED
if (speed == USB_SPEED_SUPER ||
speed == USB_SPEED_SUPER_PLUS ||
speed == USB_SPEED_UNKNOWN)
{
len += sizeof(struct usb_ss_epcompdesc_s);
}
#endif
if (epdesc == NULL)
{
return len;
}
switch (epid)
{
#ifdef CONFIG_CDCACM_HAVE_EPINTIN
case CDCACM_EPINTIN: /* Interrupt IN endpoint */
{
epdesc->len = USB_SIZEOF_EPDESC; /* Descriptor length */
epdesc->type = USB_DESC_TYPE_ENDPOINT; /* Descriptor type */
epdesc->addr = CDCACM_MKEPINTIN(devinfo); /* Endpoint address */
epdesc->attr = CDCACM_EPINTIN_ATTR; /* Endpoint attributes */
#ifdef CONFIG_USBDEV_SUPERSPEED
if (speed == USB_SPEED_SUPER || speed == USB_SPEED_SUPER_PLUS)
{
/* Maximum packet size (super speed) */
epdesc->mxpacketsize[0] = LSBYTE(CONFIG_CDCACM_EPINTIN_SSSIZE);
epdesc->mxpacketsize[1] = MSBYTE(CONFIG_CDCACM_EPINTIN_SSSIZE);
/* Copy endpoint companion description */
epdesc++;
cdcacm_copy_epcompdesc(epid,
(FAR struct usb_ss_epcompdesc_s *)epdesc);
}
else
#endif
#ifdef CONFIG_USBDEV_DUALSPEED
if (speed == USB_SPEED_HIGH)
{
/* Maximum packet size (high speed) */
epdesc->mxpacketsize[0] = LSBYTE(CONFIG_CDCACM_EPINTIN_HSSIZE);
epdesc->mxpacketsize[1] = MSBYTE(CONFIG_CDCACM_EPINTIN_HSSIZE);
}
else
#endif
{
/* Maximum packet size (full speed) */
epdesc->mxpacketsize[0] = LSBYTE(CONFIG_CDCACM_EPINTIN_FSSIZE);
epdesc->mxpacketsize[1] = MSBYTE(CONFIG_CDCACM_EPINTIN_FSSIZE);
}
epdesc->interval = 10; /* Interval */
}
break;
#endif
case CDCACM_EPBULKOUT: /* Bulk OUT endpoint */
{
epdesc->len = USB_SIZEOF_EPDESC; /* Descriptor length */
epdesc->type = USB_DESC_TYPE_ENDPOINT; /* Descriptor type */
epdesc->addr = CDCACM_MKEPBULKOUT(devinfo); /* Endpoint address */
epdesc->attr = CDCACM_EPOUTBULK_ATTR; /* Endpoint attributes */
#ifdef CONFIG_USBDEV_SUPERSPEED
if (speed == USB_SPEED_SUPER || speed == USB_SPEED_SUPER_PLUS)
{
/* Maximum packet size (super speed) */
epdesc->mxpacketsize[0] = LSBYTE(CONFIG_CDCACM_EPBULKOUT_SSSIZE);
epdesc->mxpacketsize[1] = MSBYTE(CONFIG_CDCACM_EPBULKOUT_SSSIZE);
/* Copy endpoint companion description */
epdesc++;
cdcacm_copy_epcompdesc(epid,
(FAR struct usb_ss_epcompdesc_s *)epdesc);
}
else
#endif
#ifdef CONFIG_USBDEV_DUALSPEED
if (speed == USB_SPEED_HIGH)
{
/* Maximum packet size (high speed) */
epdesc->mxpacketsize[0] = LSBYTE(CONFIG_CDCACM_EPBULKOUT_HSSIZE);
epdesc->mxpacketsize[1] = MSBYTE(CONFIG_CDCACM_EPBULKOUT_HSSIZE);
}
else
#endif
{
/* Maximum packet size (full speed) */
epdesc->mxpacketsize[0] = LSBYTE(CONFIG_CDCACM_EPBULKOUT_FSSIZE);
epdesc->mxpacketsize[1] = MSBYTE(CONFIG_CDCACM_EPBULKOUT_FSSIZE);
}
epdesc->interval = 1; /* Interval */
}
break;
case CDCACM_EPBULKIN: /* Bulk IN endpoint */
{
epdesc->len = USB_SIZEOF_EPDESC; /* Descriptor length */
epdesc->type = USB_DESC_TYPE_ENDPOINT; /* Descriptor type */
epdesc->addr = CDCACM_MKEPBULKIN(devinfo); /* Endpoint address */
epdesc->attr = CDCACM_EPINBULK_ATTR; /* Endpoint attributes */
#ifdef CONFIG_USBDEV_SUPERSPEED
if (speed == USB_SPEED_SUPER || speed == USB_SPEED_SUPER_PLUS)
{
/* Maximum packet size (super speed) */
epdesc->mxpacketsize[0] = LSBYTE(CONFIG_CDCACM_EPBULKIN_SSSIZE);
epdesc->mxpacketsize[1] = MSBYTE(CONFIG_CDCACM_EPBULKIN_SSSIZE);
/* Copy endpoint companion description */
epdesc++;
cdcacm_copy_epcompdesc(epid,
(FAR struct usb_ss_epcompdesc_s *)epdesc);
}
else
#endif
#ifdef CONFIG_USBDEV_DUALSPEED
if (speed == USB_SPEED_HIGH)
{
/* Maximum packet size (high speed) */
epdesc->mxpacketsize[0] = LSBYTE(CONFIG_CDCACM_EPBULKIN_HSSIZE);
epdesc->mxpacketsize[1] = MSBYTE(CONFIG_CDCACM_EPBULKIN_HSSIZE);
}
else
#endif
{
/* Maximum packet size (full speed) */
epdesc->mxpacketsize[0] = LSBYTE(CONFIG_CDCACM_EPBULKIN_FSSIZE);
epdesc->mxpacketsize[1] = MSBYTE(CONFIG_CDCACM_EPBULKIN_FSSIZE);
}
epdesc->interval = 1; /* Interval */
}
break;
default:
return 0;
}
return len;
}
/****************************************************************************
* Name: cdcacm_mkcfgdesc
*
* Description:
* Construct the configuration descriptor
*
****************************************************************************/
int16_t cdcacm_mkcfgdesc(FAR uint8_t *buf,
FAR struct usbdev_devinfo_s *devinfo,
uint8_t speed, uint8_t type)
{
int length = 0;
int ret;
if (type == USB_DESC_TYPE_OTHERSPEEDCONFIG && speed < USB_SPEED_SUPER)
{
speed = speed == USB_SPEED_HIGH ? USB_SPEED_FULL : USB_SPEED_HIGH;
}
/* Fill in all descriptors directly to the buf */
/* Configuration Descriptor. If the serial device is used in as part
* or a composite device, then the configuration descriptor is
* provided by the composite device logic.
*/
#if !defined(CONFIG_CDCACM_COMPOSITE)
if (buf != NULL)
{
/* Configuration descriptor.
* If the USB serial device is configured as part of composite device,
* then the configuration descriptor will be provided by the
* composite device logic.
*/
FAR struct usb_cfgdesc_s *dest = (FAR struct usb_cfgdesc_s *)buf;
/* Let's calculate the size... */
int16_t size = cdcacm_mkcfgdesc(NULL, NULL, speed, type);
dest->len = USB_SIZEOF_CFGDESC; /* Descriptor length */
dest->type = type; /* Descriptor type */
dest->totallen[0] = LSBYTE(size); /* LS Total length */
dest->totallen[1] = MSBYTE(size); /* MS Total length */
dest->ninterfaces = CDCACM_NINTERFACES; /* Number of interfaces */
dest->cfgvalue = CDCACM_CONFIGID; /* Configuration value */
dest->icfg = CDCACM_CONFIGSTRID; /* Configuration */
dest->attr = USB_CONFIG_ATTR_ONE | /* Attributes */
CDCACM_SELFPOWERED |
CDCACM_REMOTEWAKEUP;
dest->mxpower = (CONFIG_USBDEV_MAXPOWER + 1) / 2; /* Max power (mA/2) */
buf += sizeof(struct usb_cfgdesc_s);
}
length += sizeof(struct usb_cfgdesc_s);
/* If the serial device is part of a composite device, then it should
* begin with an interface association descriptor (IAD) because the
* CDC/ACM device consists of more than one interface. The IAD associates
* the two CDC/ACM interfaces with the same CDC/ACM device.
*/
#elif defined(CONFIG_COMPOSITE_IAD)
/* Interface association descriptor */
if (buf != NULL)
{
FAR struct usb_iaddesc_s *dest = (FAR struct usb_iaddesc_s *)buf;
dest->len = USB_SIZEOF_IADDESC; /* Descriptor length */
dest->type = USB_DESC_TYPE_INTERFACEASSOCIATION; /* Descriptor type */
dest->firstif = devinfo->ifnobase; /* Number of first interface of the function */
dest->nifs = devinfo->ninterfaces; /* Number of interfaces associated with the function */
dest->classid = USB_CLASS_CDC; /* Class code */
dest->subclass = CDC_SUBCLASS_ACM; /* Sub-class code */
dest->protocol = CDC_PROTO_NONE; /* Protocol code */
dest->ifunction = 0; /* Index to string identifying the function */
buf += sizeof(struct usb_iaddesc_s);
}
length += sizeof(struct usb_iaddesc_s);
#endif
/* Notification interface */
if (buf != NULL)
{
FAR struct usb_ifdesc_s *dest = (FAR struct usb_ifdesc_s *)buf;
dest->len = USB_SIZEOF_IFDESC; /* Descriptor length */
dest->type = USB_DESC_TYPE_INTERFACE; /* Descriptor type */
dest->ifno = devinfo->ifnobase; /* Interface number */
dest->alt = CDCACM_NOTALTIFID; /* Alternate setting */
#ifdef CONFIG_CDCACM_HAVE_EPINTIN
dest->neps = 1; /* Number of endpoints */
#else
dest->neps = 0; /* Number of endpoints */
#endif
dest->classid = USB_CLASS_CDC; /* Interface class */
dest->subclass = CDC_SUBCLASS_ACM; /* Interface sub-class */
dest->protocol = CDC_PROTO_ATM; /* Interface protocol */
#ifdef CONFIG_CDCACM_NOTIFSTR
dest->iif = devinfo->strbase + CDCACM_NOTIFSTRID; /* iInterface */
#else
dest->iif = 0; /* iInterface */
#endif
buf += sizeof(struct usb_ifdesc_s);
}
length += sizeof(struct usb_ifdesc_s);
/* Header functional descriptor */
if (buf != NULL)
{
FAR struct cdc_hdr_funcdesc_s *dest =
(FAR struct cdc_hdr_funcdesc_s *)buf;
dest->size = SIZEOF_HDR_FUNCDESC; /* Descriptor length */
dest->type = USB_DESC_TYPE_CSINTERFACE; /* Descriptor type */
dest->subtype = CDC_DSUBTYPE_HDR; /* Descriptor sub-type */
dest->cdc[0] = LSBYTE(CDC_VERSIONNO); /* CDC release number in BCD */
dest->cdc[1] = MSBYTE(CDC_VERSIONNO);
buf += sizeof(struct cdc_hdr_funcdesc_s);
}
length += sizeof(struct cdc_hdr_funcdesc_s);
/* ACM functional descriptor */
if (buf != NULL)
{
FAR struct cdc_acm_funcdesc_s *dest =
(FAR struct cdc_acm_funcdesc_s *)buf;
dest->size = SIZEOF_ACM_FUNCDESC; /* Descriptor length */
dest->type = USB_DESC_TYPE_CSINTERFACE; /* Descriptor type */
dest->subtype = CDC_DSUBTYPE_ACM; /* Descriptor sub-type */
dest->caps = 0x06; /* Bit encoded capabilities */
buf += sizeof(struct cdc_acm_funcdesc_s);
}
length += sizeof(struct cdc_acm_funcdesc_s);
/* This codeblock is just for future use - currently we didn't need it */
#ifdef OPTIONAL_UNION_FUNCTIONAL_DESCRIPTOR
/* Union functional descriptor */
if (buf != NULL)
{
FAR struct cdc_union_funcdesc_s *dest =
(FAR struct cdc_union_funcdesc_s *)buf;
dest->size = SIZEOF_UNION_FUNCDESC(1); /* Descriptor length */
dest->type = USB_DESC_TYPE_CSINTERFACE; /* Descriptor type */
dest->subtype = CDC_DSUBTYPE_UNION; /* Descriptor sub-type */
dest->master = devinfo->ifnobase; /* Master interface number */
dest->slave[0] = devinfo->ifnobase + 1; /* Slave[0] interface number */
buf += sizeof(struct cdc_union_funcdesc_s);
}
length += sizeof(struct cdc_union_funcdesc_s);
#endif
/* Call Management functional descriptor */
if (buf != NULL)
{
FAR struct cdc_callmgmt_funcdesc_s *dest =
(FAR struct cdc_callmgmt_funcdesc_s *)buf;
dest->size = SIZEOF_CALLMGMT_FUNCDESC; /* Descriptor length */
dest->type = USB_DESC_TYPE_CSINTERFACE; /* Descriptor type */
dest->subtype = CDC_DSUBTYPE_CALLMGMT; /* Descriptor sub-type */
dest->caps = 3; /* Bit encoded capabilities */
dest->ifno = devinfo->ifnobase + 1; /* Interface number of Data Class interface */
buf += sizeof(struct cdc_callmgmt_funcdesc_s);
}
length += sizeof(struct cdc_callmgmt_funcdesc_s);
#ifdef CONFIG_CDCACM_HAVE_EPINTIN
/* Interrupt IN endpoint descriptor */
ret = cdcacm_copy_epdesc(CDCACM_EPINTIN,
(FAR struct usb_epdesc_s *)buf,
devinfo,
speed);
if (buf != NULL)
{
buf += ret;
}
length += ret;
#endif
/* Data interface descriptor */
if (buf != NULL)
{
FAR struct usb_ifdesc_s *dest = (FAR struct usb_ifdesc_s *)buf;
dest->len = USB_SIZEOF_IFDESC; /* Descriptor length */
dest->type = USB_DESC_TYPE_INTERFACE; /* Descriptor type */
dest->ifno = devinfo->ifnobase + 1; /* Interface number */
dest->alt = CDCACM_DATAALTIFID; /* Alternate setting */
dest->neps = 2; /* Number of endpoints */
dest->classid = USB_CLASS_CDC_DATA; /* Interface class */
dest->subclass = CDC_DATA_SUBCLASS_NONE; /* Interface sub-class */
dest->protocol = CDC_DATA_PROTO_NONE; /* Interface protocol */
#ifdef CONFIG_CDCACM_DATAIFSTR
dest->iif = devinfo->strbase + CDCACM_DATAIFSTRID; /* iInterface */
#else
dest->iif = 0; /* iInterface */
#endif
buf += sizeof(struct usb_ifdesc_s);
}
length += sizeof(struct usb_ifdesc_s);
/* Bulk OUT endpoint descriptor */
ret = cdcacm_copy_epdesc(CDCACM_EPBULKOUT,
(FAR struct usb_epdesc_s *)buf,
devinfo,
speed);
if (buf != NULL)
{
buf += ret;
}
length += ret;
/* Bulk IN endpoint descriptor */
ret = cdcacm_copy_epdesc(CDCACM_EPBULKIN,
(FAR struct usb_epdesc_s *)buf,
devinfo,
speed);
if (buf != NULL)
{
buf += ret;
}
length += ret;
return length;
}
/****************************************************************************
* Name: cdcacm_getqualdesc
*
* Description:
* Return a pointer to the raw qual descriptor
*
****************************************************************************/
#if !defined(CONFIG_CDCACM_COMPOSITE) && defined(CONFIG_USBDEV_DUALSPEED)
FAR const struct usb_qualdesc_s *cdcacm_getqualdesc(void)
{
return &g_qualdesc;
}
#endif
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