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px4-firmware/nuttx/drivers/usbdev/cdcacm_desc.c

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/****************************************************************************
* drivers/usbdev/cdcacm_desc.c
*
* Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/usb/usb.h>
#include <nuttx/usb/cdc.h>
#include <nuttx/usb/cdcacm.h>
#include <nuttx/usb/usbdev_trace.h>
#include "cdcacm.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/* Describes one description in the group of descriptors forming the
* total configuration descriptor.
*/
struct cfgdecsc_group_s
{
uint16_t descsize; /* Size of the descriptor in bytes */
uint16_t hsepsize; /* High speed max packet size */
FAR void *desc; /* A pointer to the descriptor */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* 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
/* 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.
*/
#ifndef CONFIG_CDCACM_COMPOSITE
static const struct usb_cfgdesc_s g_cfgdesc =
{
USB_SIZEOF_CFGDESC, /* len */
USB_DESC_TYPE_CONFIG, /* type */
{
LSBYTE(SIZEOF_CDCACM_CFGDESC), /* LS totallen */
MSBYTE(SIZEOF_CDCACM_CFGDESC) /* MS totallen */
},
CDCACM_NINTERFACES, /* ninterfaces */
CDCACM_CONFIGID, /* cfgvalue */
CDCACM_CONFIGSTRID, /* icfg */
USB_CONFIG_ATTR_ONE|SELFPOWERED|REMOTEWAKEUP, /* attr */
(CONFIG_USBDEV_MAXPOWER + 1) / 2 /* mxpower */
};
#endif
/* Interface association descriptor */
#if defined(CONFIG_CDCACM_COMPOSITE) && defined(CONFIG_COMPOSITE_IAD)
static const struct usb_iaddesc_s g_iaddesc =
{
USB_SIZEOF_IADDESC, /* len */
USB_DESC_TYPE_INTERFACEASSOCIATION, /* type */
CONFIG_CDCACM_IFNOBASE, /* firstif */
CDCACM_NINTERFACES, /* nifs */
USB_CLASS_CDC, /* class */
CDC_SUBCLASS_ACM, /* subclass */
CDC_PROTO_NONE, /* protocol */
0 /* ifunction */
};
#endif
/* Notification interface */
static const struct usb_ifdesc_s g_notifdesc =
{
USB_SIZEOF_IFDESC, /* len */
USB_DESC_TYPE_INTERFACE, /* type */
CDCACM_NOTIFID, /* ifno */
CDCACM_NOTALTIFID, /* alt */
1, /* neps */
USB_CLASS_CDC, /* class */
CDC_SUBCLASS_ACM, /* subclass */
CDC_PROTO_ATM, /* proto */
#ifdef CONFIG_CDCACM_NOTIFSTR
CDCACM_NOTIFSTRID /* iif */
#else
0 /* iif */
#endif
};
/* Header functional descriptor */
static const struct cdc_hdr_funcdesc_s g_funchdr =
{
SIZEOF_HDR_FUNCDESC, /* size */
USB_DESC_TYPE_CSINTERFACE, /* type */
CDC_DSUBTYPE_HDR, /* subtype */
{
LSBYTE(CDC_VERSIONNO), /* LS cdc */
MSBYTE(CDC_VERSIONNO) /* MS cdc */
}
};
/* ACM functional descriptor */
static const struct cdc_acm_funcdesc_s g_acmfunc =
{
SIZEOF_ACM_FUNCDESC, /* size */
USB_DESC_TYPE_CSINTERFACE, /* type */
CDC_DSUBTYPE_ACM, /* subtype */
0x06 /* caps */
};
/* Union functional descriptor */
static const struct cdc_union_funcdesc_s g_unionfunc =
{
SIZEOF_UNION_FUNCDESC(1), /* size */
USB_DESC_TYPE_CSINTERFACE, /* type */
CDC_DSUBTYPE_UNION, /* subtype */
0, /* master */
{1} /* slave[0] */
};
/* Interrupt IN endpoint descriptor */
static const struct usb_epdesc_s g_epintindesc =
{
USB_SIZEOF_EPDESC, /* len */
USB_DESC_TYPE_ENDPOINT, /* type */
CDCACM_EPINTIN_ADDR, /* addr */
CDCACM_EPINTIN_ATTR, /* attr */
{
LSBYTE(CONFIG_CDCACM_EPINTIN_FSSIZE), /* maxpacket (full speed) */
MSBYTE(CONFIG_CDCACM_EPINTIN_FSSIZE)
},
0xff /* interval */
};
/* Data interface descriptor */
static const struct usb_ifdesc_s g_dataifdesc =
{
USB_SIZEOF_IFDESC, /* len */
USB_DESC_TYPE_INTERFACE, /* type */
CDCACM_DATAIFID, /* ifno */
CDCACM_DATAALTIFID, /* alt */
2, /* neps */
USB_CLASS_CDC_DATA, /* class */
CDC_DATA_SUBCLASS_NONE, /* subclass */
CDC_DATA_PROTO_NONE, /* proto */
#ifdef CONFIG_CDCACM_DATAIFSTR
CDCACM_DATAIFSTRID /* iif */
#else
0 /* iif */
#endif
};
/* Bulk OUT endpoint descriptor */
static const struct usb_epdesc_s g_epbulkoutdesc =
{
USB_SIZEOF_EPDESC, /* len */
USB_DESC_TYPE_ENDPOINT, /* type */
CDCACM_EPOUTBULK_ADDR, /* addr */
CDCACM_EPOUTBULK_ATTR, /* attr */
{
LSBYTE(CONFIG_CDCACM_EPBULKOUT_FSSIZE), /* maxpacket (full speed) */
MSBYTE(CONFIG_CDCACM_EPBULKOUT_FSSIZE)
},
1 /* interval */
};
/* Bulk IN endpoint descriptor */
static const struct usb_epdesc_s g_epbulkindesc =
{
USB_SIZEOF_EPDESC, /* len */
USB_DESC_TYPE_ENDPOINT, /* type */
CDCACM_EPINBULK_ADDR, /* addr */
CDCACM_EPINBULK_ATTR, /* attr */
{
LSBYTE(CONFIG_CDCACM_EPBULKIN_FSSIZE), /* maxpacket (full speed) */
MSBYTE(CONFIG_CDCACM_EPBULKIN_FSSIZE)
},
1 /* interval */
};
/* The components of the the configuration descriptor are maintained as
* a collection of separate descriptor structure coordinated by the
* following array. These descriptors could have been combined into
* one larger "super" configuration descriptor structure. However, I
* have concerns about compiler-dependent alignment and packing. Since
* the individual structures consist only of byte types, alignment and
* packing is not an issue. And since the are concatentated at run time
* instead of compile time, there should no issues there either.
*/
static const struct cfgdecsc_group_s g_cfggroup[CDCACM_CFGGROUP_SIZE] =
{
/* 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)
{
USB_SIZEOF_CFGDESC, /* 1. Configuration descriptor */
0,
(FAR void *)&g_cfgdesc
},
/* 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)
{
USB_SIZEOF_IADDESC, /* 1. Interface association descriptor */
0,
(FAR void *)&g_iaddesc
},
#endif
{
USB_SIZEOF_IFDESC, /* 2. Notification interface */
0,
(FAR void *)&g_notifdesc
},
{
SIZEOF_HDR_FUNCDESC, /* 3. Header functional descriptor */
0,
(FAR void *)&g_funchdr
},
{
SIZEOF_ACM_FUNCDESC, /* 4. ACM functional descriptor */
0,
(FAR void *)&g_acmfunc
},
{
SIZEOF_UNION_FUNCDESC(1), /* 5. Union functional descriptor */
0,
(FAR void *)&g_unionfunc
},
{
USB_SIZEOF_EPDESC, /* 6. Interrupt IN endpoint descriptor */
CONFIG_CDCACM_EPINTIN_HSSIZE,
(FAR void *)&g_epintindesc
},
{
USB_SIZEOF_IFDESC, /* 7. Data interface descriptor */
0,
(FAR void *)&g_dataifdesc
},
{
USB_SIZEOF_EPDESC, /* 8. Bulk OUT endpoint descriptor */
CONFIG_CDCACM_EPBULKOUT_HSSIZE,
(FAR void *)&g_epbulkoutdesc
},
{
USB_SIZEOF_EPDESC, /* 9. Bulk OUT endpoint descriptor */
CONFIG_CDCACM_EPBULKIN_HSSIZE,
(FAR void *)&g_epbulkindesc
}
};
#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
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: cdcacm_mkstrdesc
*
* Description:
* Construct a string descriptor
*
****************************************************************************/
int cdcacm_mkstrdesc(uint8_t id, struct usb_strdesc_s *strdesc)
{
#if !defined(CONFIG_CDCACM_COMPOSITE) || defined(CONFIG_CDCACM_NOTIFSTR) || \
defined(CONFIG_CDCACM_DATAIFSTR)
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;
strdesc->data[0] = LSBYTE(CDCACM_STR_LANGUAGE);
strdesc->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:
str = CONFIG_CDCACM_SERIALSTR;
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);
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;
#else
return -EINVAL;
#endif
}
/****************************************************************************
* Name: cdcacm_getepdesc
*
* 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_getepdesc
*
* Description:
* Return a pointer to the raw endpoint struct (used for configuring
* endpoints)
*
****************************************************************************/
FAR const struct usb_epdesc_s *cdcacm_getepdesc(enum cdcacm_epdesc_e epid)
{
switch (epid)
{
case CDCACM_EPINTIN: /* Interrupt IN endpoint */
return &g_epintindesc;
case CDCACM_EPBULKOUT: /* Bulk OUT endpoint */
return &g_epbulkoutdesc;
case CDCACM_EPBULKIN: /* Bulk IN endpoint */
return &g_epbulkindesc;
default:
return NULL;
}
}
/****************************************************************************
* Name: cdcacm_mkepdesc
*
* Description:
* Construct the endpoint descriptor using the correct max packet size.
*
****************************************************************************/
#ifdef CONFIG_USBDEV_DUALSPEED
void cdcacm_mkepdesc(num cdcacm_epdesc_e epid, uint16_t mxpacket,
FAR struct usb_epdesc_s *outdesc)
{
FAR const struct usb_epdesc_s *indesc;
/* Copy the "canned" descriptor */
indesc = cdcacm_getepdesc(epid)
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: cdcacm_mkcfgdesc
*
* Description:
* Construct the configuration descriptor
*
****************************************************************************/
#ifdef CONFIG_USBDEV_DUALSPEED
int16_t cdcacm_mkcfgdesc(FAR uint8_t *buf, uint8_t speed, uint8_t type)
#else
int16_t cdcacm_mkcfgdesc(FAR uint8_t *buf)
#endif
{
FAR const struct cfgdecsc_group_s *group;
FAR uint8_t *dest = buf;
int i;
#ifdef CONFIG_USBDEV_DUALSPEED
bool hispeed = (speed == USB_SPEED_HIGH);
/* Check for switches between high and full speed */
if (type == USB_DESC_TYPE_OTHERSPEEDCONFIG)
{
hispeed = !hispeed;
}
#endif
/* Copy all of the descriptors in the group */
for (i = 0, dest = buf; i < CDCACM_CFGGROUP_SIZE; i++)
{
group = &g_cfggroup[i];
/* The "canned" descriptors all have full speed endpoint maxpacket
* sizes. If high speed is selected, we will have to change the
* endpoint maxpacket size.
*
* Is there a alternative high speed maxpacket size in the table?
* If so, that is sufficient proof that the descriptor that we
* just copied is an endpoint descriptor and needs the fixup
*/
#ifdef CONFIG_USBDEV_DUALSPEED
if (highspeed && group->hsepsize != 0)
{
cdcacm_mkepdesc(group->desc, group->hsepsize,
(FAR struct usb_epdesc_s*)dest);
}
else
#endif
/* Copy the "canned" descriptor with the full speed max packet
* size
*/
{
memcpy(dest, group->desc, group->descsize);
}
/* Advance to the destination location for the next descriptor */
dest += group->descsize;
}
return SIZEOF_CDCACM_CFGDESC;
}
/****************************************************************************
* 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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