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nuttx/drivers/usbdev/usbmsc_desc.c
Xiang Xiao 929882862b Fix usbdev/usbmsc_desc.c:316:7: error: variable 'length' set but not used [-Werror,-Wunused-but-set-variable] 
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
2022-10-30 16:03:35 +01:00

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/****************************************************************************
* drivers/usbdev/usbmsc_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_trace.h>
#ifdef CONFIG_USBMSC_BOARD_SERIALSTR
#include <nuttx/board.h>
#endif
#include "usbmsc.h"
/****************************************************************************
* Private Data
****************************************************************************/
/* Descriptors **************************************************************/
/* Device descriptor. If the USB mass storage device is configured as part
* of a composite device, then the device descriptor will be provided by the
* composite device logic.
*/
#ifndef CONFIG_USBMSC_COMPOSITE
static const struct usb_devdesc_s g_devdesc =
{
USB_SIZEOF_DEVDESC, /* len */
USB_DESC_TYPE_DEVICE, /* type */
{LSBYTE(0x0200), MSBYTE(0x0200)}, /* usb */
USB_CLASS_PER_INTERFACE, /* classid */
0, /* subclass */
0, /* protocol */
CONFIG_USBMSC_EP0MAXPACKET, /* maxpacketsize */
{ /* vendor */
LSBYTE(CONFIG_USBMSC_VENDORID),
MSBYTE(CONFIG_USBMSC_VENDORID)
},
{ /* product */
LSBYTE(CONFIG_USBMSC_PRODUCTID),
MSBYTE(CONFIG_USBMSC_PRODUCTID) },
{ /* device */
LSBYTE(CONFIG_USBMSC_VERSIONNO),
MSBYTE(CONFIG_USBMSC_VERSIONNO)
},
USBMSC_MANUFACTURERSTRID, /* imfgr */
USBMSC_PRODUCTSTRID, /* iproduct */
USBMSC_SERIALSTRID, /* serno */
USBMSC_NCONFIGS /* nconfigs */
};
#endif
#ifdef CONFIG_USBDEV_DUALSPEED
#ifndef CONFIG_USBMSC_COMPOSITE
static const struct usb_qualdesc_s g_qualdesc =
{
USB_SIZEOF_QUALDESC, /* len */
USB_DESC_TYPE_DEVICEQUALIFIER, /* type */
{ /* usb */
LSBYTE(0x0200),
MSBYTE(0x0200)
},
USB_CLASS_PER_INTERFACE, /* classid */
0, /* subclass */
0, /* protocol */
CONFIG_USBMSC_EP0MAXPACKET, /* mxpacketsize */
USBMSC_NCONFIGS, /* nconfigs */
0, /* reserved */
};
#endif
#endif
/****************************************************************************
* Public Data
****************************************************************************/
/* Strings ******************************************************************/
#ifndef CONFIG_USBMSC_COMPOSITE
const char g_mscvendorstr[] = CONFIG_USBMSC_VENDORSTR;
const char g_mscproductstr[] = CONFIG_USBMSC_PRODUCTSTR;
#ifndef CONFIG_USBMSC_BOARD_SERIALSTR
const char g_mscserialstr[] = CONFIG_USBMSC_SERIALSTR;
#endif
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: usbmsc_mkstrdesc
*
* Description:
* Construct a string descriptor
*
****************************************************************************/
int usbmsc_mkstrdesc(uint8_t id, struct FAR 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)
{
#ifndef CONFIG_USBMSC_COMPOSITE
case 0:
{
/* Descriptor 0 is the language id */
strdesc->len = 4;
strdesc->type = USB_DESC_TYPE_STRING;
data[0] = LSBYTE(USBMSC_STR_LANGUAGE);
data[1] = MSBYTE(USBMSC_STR_LANGUAGE);
return 4;
}
case USBMSC_MANUFACTURERSTRID:
str = g_mscvendorstr;
break;
case USBMSC_PRODUCTSTRID:
str = g_mscproductstr;
break;
case USBMSC_SERIALSTRID:
#ifdef CONFIG_USBMSC_BOARD_SERIALSTR
str = board_usbdev_serialstr();
#else
str = g_mscserialstr;
#endif
break;
#endif
/* case USBMSC_CONFIGSTRID: */
case USBMSC_INTERFACESTRID:
str = CONFIG_USBMSC_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);
if (len > (USBMSC_MAXSTRLEN / 2))
{
len = (USBMSC_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;
}
/****************************************************************************
* Name: usbmsc_getdevdesc
*
* Description:
* Return a pointer to the raw device descriptor
*
****************************************************************************/
#ifndef CONFIG_USBMSC_COMPOSITE
FAR const struct usb_devdesc_s *usbmsc_getdevdesc(void)
{
return &g_devdesc;
}
#endif
/****************************************************************************
* Name: usbmsc_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 usbmsc_copy_epdesc(enum usbmsc_epdesc_e epid,
FAR struct usb_epdesc_s *epdesc,
FAR struct usbdev_devinfo_s *devinfo,
bool hispeed)
{
#ifndef CONFIG_USBDEV_DUALSPEED
UNUSED(hispeed);
#endif
switch (epid)
{
case USBMSC_EPBULKOUT: /* Bulk OUT endpoint */
{
epdesc->len = USB_SIZEOF_EPDESC; /* Descriptor length */
epdesc->type = USB_DESC_TYPE_ENDPOINT; /* Descriptor type */
epdesc->addr = USBMSC_MKEPBULKOUT(devinfo); /* Endpoint address */
epdesc->attr = USBMSC_EPOUTBULK_ATTR; /* Endpoint attributes */
#ifdef CONFIG_USBDEV_DUALSPEED
if (hispeed)
{
/* Maximum packet size (high speed) */
epdesc->mxpacketsize[0] = LSBYTE(USBMSC_HSBULKMAXPACKET);
epdesc->mxpacketsize[1] = MSBYTE(USBMSC_HSBULKMAXPACKET);
}
else
#endif
{
/* Maximum packet size (full speed) */
epdesc->mxpacketsize[0] = LSBYTE(USBMSC_FSBULKMAXPACKET);
epdesc->mxpacketsize[1] = MSBYTE(USBMSC_FSBULKMAXPACKET);
}
epdesc->interval = 0; /* Interval */
}
break;
case USBMSC_EPBULKIN: /* Bulk IN endpoint */
{
epdesc->len = USB_SIZEOF_EPDESC; /* Descriptor length */
epdesc->type = USB_DESC_TYPE_ENDPOINT; /* Descriptor type */
epdesc->addr = USBMSC_MKEPBULKIN(devinfo); /* Endpoint address */
epdesc->attr = USBMSC_EPINBULK_ATTR; /* Endpoint attributes */
#ifdef CONFIG_USBDEV_DUALSPEED
if (hispeed)
{
/* Maximum packet size (high speed) */
epdesc->mxpacketsize[0] = LSBYTE(USBMSC_HSBULKMAXPACKET);
epdesc->mxpacketsize[1] = MSBYTE(USBMSC_HSBULKMAXPACKET);
}
else
#endif
{
/* Maximum packet size (full speed) */
epdesc->mxpacketsize[0] = LSBYTE(USBMSC_FSBULKMAXPACKET);
epdesc->mxpacketsize[1] = MSBYTE(USBMSC_FSBULKMAXPACKET);
}
epdesc->interval = 0; /* Interval */
}
break;
default:
return 0;
}
return sizeof(struct usb_epdesc_s);
}
/****************************************************************************
* Name: usbmsc_mkcfgdesc
*
* Description:
* Construct the configuration descriptor
*
****************************************************************************/
#ifdef CONFIG_USBDEV_DUALSPEED
int16_t usbmsc_mkcfgdesc(uint8_t *buf,
FAR struct usbdev_devinfo_s *devinfo,
uint8_t speed, uint8_t type)
#else
int16_t usbmsc_mkcfgdesc(uint8_t *buf,
FAR struct usbdev_devinfo_s *devinfo)
#endif
{
bool hispeed = false;
#ifdef CONFIG_USBDEV_DUALSPEED
hispeed = (speed == USB_SPEED_HIGH);
/* Check for switches between high and full speed */
if (type == USB_DESC_TYPE_OTHERSPEEDCONFIG)
{
hispeed = !hispeed;
}
#endif
/* Fill in all descriptors directly to the buf */
/* Configuration descriptor. If the USB mass storage device is
* configured as part of a composite device, then the configuration
* descriptor will be provided by the composite device logic.
*/
#ifndef CONFIG_USBMSC_COMPOSITE
{
/* Configuration descriptor If the USB mass storage device is
* configured as part of a 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;
dest->len = USB_SIZEOF_CFGDESC; /* Descriptor length */
#ifdef CONFIG_USBDEV_DUALSPEED
dest->type = type; /* Descriptor type */
#else
dest->type = USB_DESC_TYPE_CONFIG; /* Descriptor type */
#endif
dest->totallen[0] = LSBYTE(SIZEOF_USBMSC_CFGDESC); /* LS Total length */
dest->totallen[1] = MSBYTE(SIZEOF_USBMSC_CFGDESC); /* MS Total length */
dest->ninterfaces = USBMSC_NINTERFACES; /* Number of interfaces */
dest->cfgvalue = USBMSC_CONFIGID; /* Configuration value */
dest->icfg = USBMSC_CONFIGSTRID; /* Configuration */
dest->attr = USB_CONFIG_ATTR_ONE | /* Attributes */
USBMSC_SELFPOWERED |
USBMSC_REMOTEWAKEUP;
dest->mxpower = (CONFIG_USBDEV_MAXPOWER + 1) / 2; /* Max power (mA/2) */
buf += sizeof(struct usb_cfgdesc_s);
}
#endif
/* Copy the canned interface descriptor */
{
/* Single interface descriptor */
FAR struct usb_ifdesc_s * dest = (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 = USBMSC_ALTINTERFACEID; /* Alternate setting */
dest->neps = USBMSC_NENDPOINTS; /* Number of endpoints */
dest->classid = USB_CLASS_MASS_STORAGE; /* Interface class */
dest->subclass = USBMSC_SUBCLASS_SCSI; /* Interface sub-class */
dest->protocol = USBMSC_PROTO_BULKONLY; /* Interface protocol */
dest->iif = devinfo->strbase + USBMSC_INTERFACESTRID; /* iInterface */
buf += sizeof(struct usb_ifdesc_s);
}
/* Make the two endpoint configurations */
/* Bulk IN endpoint descriptor */
{
int len = usbmsc_copy_epdesc(USBMSC_EPBULKIN,
(FAR struct usb_epdesc_s *)buf,
devinfo, hispeed);
buf += len;
}
/* Bulk OUT endpoint descriptor */
{
int len = usbmsc_copy_epdesc(USBMSC_EPBULKOUT,
(FAR struct usb_epdesc_s *)buf, devinfo,
hispeed);
buf += len;
}
return SIZEOF_USBMSC_CFGDESC;
}
/****************************************************************************
* Name: usbmsc_getqualdesc
*
* Description:
* Return a pointer to the raw qual descriptor
*
****************************************************************************/
#if !defined(CONFIG_USBMSC_COMPOSITE) && defined(CONFIG_USBDEV_DUALSPEED)
FAR const struct usb_qualdesc_s *usbmsc_getqualdesc(void)
{
return &g_qualdesc;
}
#endif
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