nuttx/drivers/usbdev/composite_desc.c

/****************************************************************************
 * drivers/usbdev/composite_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 <assert.h>
#include <debug.h>

#ifdef CONFIG_COMPOSITE_BOARD_SERIALSTR
#include <nuttx/board.h>
#endif

#include <nuttx/usb/usbdev_trace.h>

#include "composite.h"

#ifdef CONFIG_USBDEV_COMPOSITE

/****************************************************************************
 * Private Data
 ****************************************************************************/

/* Device Descriptor */

static const struct usb_devdesc_s g_devdesc =
{
  USB_SIZEOF_DEVDESC,                           /* len */
  USB_DESC_TYPE_DEVICE,                         /* type */
  {                                             /* usb */
    LSBYTE(0x0200),
    MSBYTE(0x0200)
  },
#ifndef CONFIG_COMPOSITE_IAD
  USB_CLASS_MISC,                               /* classid */
  2,                                            /* subclass */
  1,                                            /* protocol */
#else
  USB_CLASS_PER_INTERFACE,                      /* classid */
  0,                                            /* subclass */
  0,                                            /* protocol */
#endif
  CONFIG_COMPOSITE_EP0MAXPACKET,                /* maxpacketsize */
  {
    LSBYTE(CONFIG_COMPOSITE_VENDORID),          /* vendor */
    MSBYTE(CONFIG_COMPOSITE_VENDORID)
  },
  {
    LSBYTE(CONFIG_COMPOSITE_PRODUCTID),         /* product */
    MSBYTE(CONFIG_COMPOSITE_PRODUCTID)
  },
  {
    LSBYTE(CONFIG_COMPOSITE_VERSIONNO),         /* device */
    MSBYTE(CONFIG_COMPOSITE_VERSIONNO)
  },
  COMPOSITE_MANUFACTURERSTRID,                  /* imfgr */
  COMPOSITE_PRODUCTSTRID,                       /* iproduct */
  COMPOSITE_SERIALSTRID,                        /* serno */
  COMPOSITE_NCONFIGS                            /* nconfigs */
};

#ifdef 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,                        /* classid */
  0,                                            /* subclass */
  0,                                            /* protocol */
  CONFIG_COMPOSITE_EP0MAXPACKET,                /* mxpacketsize */
  COMPOSITE_NCONFIGS,                           /* nconfigs */
  0,                                            /* reserved */
};
#endif

/****************************************************************************
 * Private Functions
 ****************************************************************************/

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: composite_mkstrdesc
 *
 * Description:
 *   Construct a string descriptor
 *
 ****************************************************************************/

int composite_mkstrdesc(uint8_t id, FAR struct usb_strdesc_s *strdesc)
{
  FAR uint8_t *data = (FAR uint8_t *)(strdesc + 1);
  FAR 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;
        data[0] = LSBYTE(COMPOSITE_STR_LANGUAGE);
        data[1] = MSBYTE(COMPOSITE_STR_LANGUAGE);
        return 4;
      }

    case COMPOSITE_MANUFACTURERSTRID:
      str = g_compvendorstr;
      break;

    case COMPOSITE_PRODUCTSTRID:
      str = g_compproductstr;
      break;

    case COMPOSITE_SERIALSTRID:
#ifdef CONFIG_COMPOSITE_BOARD_SERIALSTR
      str = board_usbdev_serialstr();
#else
      str = g_compserialstr;
#endif
      break;

    case COMPOSITE_CONFIGSTRID:
      str = CONFIG_COMPOSITE_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)
    {
      data[ndata]     = str[i];
      data[ndata + 1] = 0;
    }

  strdesc->len  = ndata + 2;
  strdesc->type = USB_DESC_TYPE_STRING;
  return strdesc->len;
}

/****************************************************************************
 * Name: composite_getepdesc
 *
 * Description:
 *   Return a pointer to the raw device descriptor
 *
 ****************************************************************************/

FAR const struct usb_devdesc_s *composite_getdevdesc(void)
{
  return &g_devdesc;
}

/****************************************************************************
 * Name: composite_mkcfgdesc
 *
 * Description:
 *   Construct the configuration descriptor
 *
 ****************************************************************************/

#ifdef CONFIG_USBDEV_DUALSPEED
int16_t composite_mkcfgdesc(FAR struct composite_dev_s *priv,
                            FAR uint8_t *buf,
                            uint8_t speed, uint8_t type)
#else
int16_t composite_mkcfgdesc(FAR struct composite_dev_s *priv,
                            FAR uint8_t *buf)
#endif
{
  FAR struct usb_cfgdesc_s *cfgdesc = (FAR struct usb_cfgdesc_s *)buf;
  int16_t len;
  int16_t total;
  int i;

  /* Configuration descriptor for the composite device */

  /* Fill in the values directly into the buf */

  cfgdesc->len         = USB_SIZEOF_CFGDESC;               /* Descriptor length */
#ifdef CONFIG_USBDEV_DUALSPEED
  cfgdesc->type        = type;                             /* Descriptor type */
#else
  cfgdesc->type        = USB_DESC_TYPE_CONFIG;             /* Descriptor type */
#endif
  cfgdesc->totallen[0] = LSBYTE(priv->cfgdescsize);        /* Lower Byte of Total length */
  cfgdesc->totallen[1] = MSBYTE(priv->cfgdescsize);        /* High Byte of Total length */
  cfgdesc->ninterfaces = priv->ninterfaces;                /* Number of interfaces */
  cfgdesc->cfgvalue    = COMPOSITE_CONFIGID;               /* Configuration value */
  cfgdesc->icfg        = COMPOSITE_CONFIGSTRID;            /* Configuration */
  cfgdesc->attr        = USB_CONFIG_ATTR_ONE |             /* Attributes */
                         COMPOSITE_SELFPOWERED |
                         COMPOSITE_REMOTEWAKEUP;
  cfgdesc->mxpower     = (CONFIG_USBDEV_MAXPOWER + 1) / 2; /* Max power (mA/2) */

  /* increment the size and buf to point right behind the information
   * filled in
   */

  total = USB_SIZEOF_CFGDESC;
  buf += USB_SIZEOF_CFGDESC;

  /* Copy all contained interface descriptors into the buffer too */

  for (i = 0; i < priv->ndevices; i++)
    {
#ifdef CONFIG_USBDEV_DUALSPEED
      len = priv->device[i].compdesc.mkconfdesc(buf,
                                        &priv->device[i].compdesc.devinfo,
                                        speed, type);
      total += len;
      buf += len;
#else
      len = priv->device[i].compdesc.mkconfdesc(buf,
                                        &priv->device[i].compdesc.devinfo);
      total += len;
      buf += len;
#endif
    }

  return total;
}

/****************************************************************************
 * Name: composite_getqualdesc
 *
 * Description:
 *   Return a pointer to the raw qual descriptor
 *
 ****************************************************************************/

#ifdef CONFIG_USBDEV_DUALSPEED
FAR const struct usb_qualdesc_s *composite_getqualdesc(void)
{
  return &g_qualdesc;
}
#endif

#endif /* CONFIG_USBDEV_COMPOSITE */