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incubator-nuttx/drivers/usbdev/composite.c

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/****************************************************************************
* drivers/usbdev/composite.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 <assert.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/irq.h>
#include <nuttx/arch.h>
#include <nuttx/kmalloc.h>
#include <nuttx/usb/usb.h>
#include <nuttx/usb/usbdev.h>
#include <nuttx/usb/usbdev_trace.h>
#ifdef CONFIG_BOARD_USBDEV_SERIALSTR
# include <nuttx/board.h>
#endif
#include "composite.h"
/****************************************************************************
* Private Types
****************************************************************************/
/* The internal version of the class driver */
struct composite_driver_s
{
struct usbdevclass_driver_s drvr;
FAR struct composite_dev_s *dev;
};
/* This is what is allocated */
struct composite_alloc_s
{
struct composite_dev_s dev;
struct composite_driver_s drvr;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* USB helpers **************************************************************/
static void composite_ep0incomplete(FAR struct usbdev_ep_s *ep,
FAR struct usbdev_req_s *req);
static int composite_classsetup(FAR struct composite_dev_s *priv,
FAR struct usbdev_s *dev,
FAR const struct usb_ctrlreq_s *ctrl, FAR uint8_t *dataout,
size_t outlen);
/* USB class device *********************************************************/
static int composite_bind(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev);
static void composite_unbind(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev);
static int composite_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);
static void composite_disconnect(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev);
static void composite_suspend(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev);
static void composite_resume(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev);
/****************************************************************************
* Private Data
****************************************************************************/
/* USB class device *********************************************************/
static const struct usbdevclass_driverops_s g_driverops =
{
composite_bind, /* bind */
composite_unbind, /* unbind */
composite_setup, /* setup */
composite_disconnect, /* disconnect */
composite_suspend, /* suspend */
composite_resume, /* resume */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: composite_ep0incomplete
*
* Description:
* Handle completion of the composite driver's EP0 control operations
*
****************************************************************************/
static void composite_ep0incomplete(FAR struct usbdev_ep_s *ep,
FAR struct usbdev_req_s *req)
{
/* Just check the result of the transfer */
if (req->result || req->xfrd != req->len)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_REQRESULT),
(uint16_t)-req->result);
}
}
/****************************************************************************
* Name: composite_classsetup
*
* Description:
* Forward a setup command to the appropriate component device
*
****************************************************************************/
static int composite_classsetup(FAR struct composite_dev_s *priv,
FAR struct usbdev_s *dev,
FAR const struct usb_ctrlreq_s *ctrl,
FAR uint8_t *dataout, size_t outlen)
{
uint16_t index;
uint8_t interface;
int ret = -EOPNOTSUPP;
int i;
index = GETUINT16(ctrl->index);
interface = (uint8_t)(index & 0xff);
for (i = 0; i < priv->ndevices; i++)
{
if (interface >= priv->device[i].compdesc.devinfo.ifnobase &&
interface < (priv->device[i].compdesc.devinfo.ifnobase +
priv->device[i].compdesc.devinfo.ninterfaces))
{
ret = CLASS_SETUP(priv->device[i].dev, dev, ctrl, dataout, outlen);
break;
}
}
return ret;
}
/****************************************************************************
* Name: composite_msftdescriptor
*
* Description:
* Assemble the Microsoft OS descriptor from the COMPATIBLE_ID's given
* in each device's composite_devdesc_s.
*
****************************************************************************/
#ifdef CONFIG_COMPOSITE_MSFT_OS_DESCRIPTORS
static int composite_msftdescriptor(FAR struct composite_dev_s *priv,
FAR struct usbdev_s *dev,
FAR const struct usb_ctrlreq_s *ctrl,
FAR struct usbdev_req_s *ctrl_rsp,
FAR bool *dispatched)
{
if (ctrl->index[0] == MSFTOSDESC_INDEX_FUNCTION)
{
/* Function descriptor is common to whole device */
FAR struct usb_msft_os_feature_desc_s *response =
(FAR struct usb_msft_os_feature_desc_s *)ctrl_rsp->buf;
int i;
memset(response, 0, sizeof(*response));
for (i = 0; i < priv->ndevices; i++)
{
if (priv->device[i].compdesc.msft_compatible_id[0] != 0)
{
FAR struct usb_msft_os_function_desc_s *func =
&response->function[response->count];
memset(func, 0, sizeof(*func));
func->firstif = priv->device[i].compdesc.devinfo.ifnobase;
func->nifs = priv->device[i].compdesc.devinfo.ninterfaces;
memcpy(func->compatible_id,
priv->device[i].compdesc.msft_compatible_id,
sizeof(func->compatible_id));
memcpy(func->sub_id, priv->device[i].compdesc.msft_sub_id,
sizeof(func->sub_id));
response->count++;
}
}
if (response->count > 0)
{
size_t total_len = sizeof(struct usb_msft_os_feature_desc_s) +
(response->count - 1) *
sizeof(struct usb_msft_os_function_desc_s);
response->len[0] = (total_len >> 0) & 0xff;
response->len[1] = (total_len >> 8) & 0xff;
response->len[2] = (total_len >> 16) & 0xff;
response->len[3] = (total_len >> 24) & 0xff;
response->version[1] = 0x01;
response->index[0] = MSFTOSDESC_INDEX_FUNCTION;
return total_len;
}
else
{
return 0;
}
}
else if (ctrl->index[0] == MSFTOSDESC_INDEX_EXTPROP ||
ctrl->index[0] == ctrl->value[0])
{
/* Extended properties are per-interface, pass the request to
* subdevice. NOTE: The documentation in OS_Desc_Ext_Prop.docx seems
* a bit incorrect here, the interface is in ctrl->value low byte.
* Also WinUSB driver has limitation that index[0] will not be correct
* if trying to read descriptors using e.g. libusb xusb.exe.
*/
uint8_t interface = ctrl->value[0];
int ret = -ENOTSUP;
int i;
for (i = 0; i < priv->ndevices; i++)
{
if (interface >= priv->device[i].compdesc.devinfo.ifnobase &&
interface < (priv->device[i].compdesc.devinfo.ifnobase +
priv->device[i].compdesc.devinfo.ninterfaces))
{
ret = CLASS_SETUP(priv->device[i].dev, dev, ctrl, NULL, 0);
*dispatched = true;
break;
}
}
return ret;
}
else
{
return -ENOTSUP;
}
}
#endif
/****************************************************************************
* Name: composite_mkcfgdesc
*
* Description:
* Construct the configuration descriptor
*
****************************************************************************/
#ifdef CONFIG_USBDEV_DUALSPEED
static int16_t composite_mkcfgdesc(FAR struct usbdevclass_driver_s *driver,
FAR uint8_t *buf,
uint8_t speed, uint8_t type)
#else
static int16_t composite_mkcfgdesc(FAR struct usbdevclass_driver_s *driver,
FAR uint8_t *buf)
#endif
{
FAR struct composite_dev_s *priv =
((FAR struct composite_driver_s *)driver)->dev;
FAR struct usb_cfgdesc_s *cfgdesc;
int16_t len;
int16_t total;
int i;
/* Configuration descriptor for the composite device */
memcpy(buf, priv->descs->cfgdesc, sizeof(struct usb_cfgdesc_s));
cfgdesc = (FAR struct usb_cfgdesc_s *)buf;
cfgdesc->totallen[0] = LSBYTE(priv->cfgdescsize);
cfgdesc->totallen[1] = MSBYTE(priv->cfgdescsize);
cfgdesc->ninterfaces = priv->ninterfaces;
/* 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++)
{
FAR struct composite_devobj_s *devobj = &priv->device[i];
#ifdef CONFIG_USBDEV_DUALSPEED
len = devobj->compdesc.mkconfdesc(buf,
&devobj->compdesc.devinfo,
speed, type);
total += len;
buf += len;
#else
len = devobj->compdesc.mkconfdesc(buf,
&devobj->compdesc.devinfo);
total += len;
buf += len;
#endif
}
return total;
}
/****************************************************************************
* Name: composite_mkstrdesc
*
* Description:
* Construct a string descriptor
*
****************************************************************************/
static int composite_mkstrdesc(FAR struct usbdevclass_driver_s *driver,
uint8_t id, FAR struct usb_strdesc_s *outdesc)
{
FAR struct composite_dev_s *priv =
((FAR struct composite_driver_s *)driver)->dev;
FAR const struct usbdev_strdescs_s *strdescs = priv->descs->strdescs;
FAR const struct usbdev_strdesc_s *strdesc;
FAR uint8_t *data = (FAR uint8_t *)(outdesc + 1);
int i;
if (id == 0)
{
outdesc->len = 4;
outdesc->type = USB_DESC_TYPE_STRING;
data[0] = LSBYTE(strdescs->language);
data[1] = MSBYTE(strdescs->language);
return 4;
}
#ifdef CONFIG_COMPOSITE_MSFT_OS_DESCRIPTORS
if (id == USB_REQ_GETMSFTOSDESCRIPTOR)
{
/* Note: Windows has a habit of caching this response,
* so if you want to enable/disable it you'll usually
* need to change the device serial number afterwards.
*/
static const uint8_t msft_response[16] =
{
'M', 0, 'S', 0, 'F', 0, 'T', 0, '1', 0, '0', 0,
'0', 0, USB_REQ_GETMSFTOSDESCRIPTOR, 0
};
outdesc->len = 18;
outdesc->type = USB_DESC_TYPE_STRING;
memcpy(data, msft_response, 16);
return outdesc->len;
}
#endif
for (strdesc = strdescs->strdesc;
strdesc != NULL && strdesc->string != NULL; strdesc++)
{
if (strdesc->id == id)
{
FAR const char *strval = strdesc->string;
int ndata;
int len;
#ifdef CONFIG_BOARD_USBDEV_SERIALSTR
if (strdesc->id == COMPOSITE_SERIALSTRID)
{
strval = board_usbdev_serialstr();
}
#endif
len = strlen(strval);
for (i = 0, ndata = 0; i < len; i++, ndata += 2)
{
data[ndata] = strval[i];
data[ndata + 1] = 0;
}
outdesc->len = ndata + 2;
outdesc->type = USB_DESC_TYPE_STRING;
return outdesc->len;
}
}
for (i = 0; i < priv->ndevices; i++)
{
if (id >
priv->device[i].compdesc.devinfo.strbase &&
id <=
priv->device[i].compdesc.devinfo.strbase +
priv->device[i].compdesc.devinfo.nstrings)
{
return priv->device[i].compdesc.mkstrdesc(
id -
priv->device[i].compdesc.devinfo.strbase,
outdesc);
}
}
return -EINVAL;
}
/****************************************************************************
* USB Class Driver Methods
****************************************************************************/
/****************************************************************************
* Name: composite_bind
*
* Description:
* Invoked when the driver is bound to a USB device driver
*
****************************************************************************/
static int composite_bind(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev)
{
FAR struct composite_dev_s *priv =
((FAR struct composite_driver_s *)driver)->dev;
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.
*/
dev->ep0->priv = priv;
/* Preallocate one control request */
priv->ctrlreq = usbdev_allocreq(dev->ep0, priv->cfgdescsize);
if (priv->ctrlreq == NULL)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_ALLOCCTRLREQ), 0);
ret = -ENOMEM;
goto errout;
}
/* Initialize the pre-allocated control request */
priv->ctrlreq->callback = composite_ep0incomplete;
/* Then bind each of the constituent class drivers */
for (i = 0; i < priv->ndevices; i++)
{
ret = CLASS_BIND(priv->device[i].dev, dev);
if (ret < 0)
{
goto errout;
}
}
/* 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:
composite_unbind(driver, dev);
return ret;
}
/****************************************************************************
* Name: composite_unbind
*
* Description:
* Invoked when the driver is unbound from a USB device driver
*
****************************************************************************/
static void composite_unbind(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev)
{
FAR struct composite_dev_s *priv;
irqstate_t flags;
usbtrace(TRACE_CLASSUNBIND, 0);
#ifdef CONFIG_DEBUG_FEATURES
if (!driver || !dev || !dev->ep0)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_INVALIDARG), 0);
return;
}
#endif
/* Extract reference to private data */
priv = ((FAR struct composite_driver_s *)driver)->dev;
#ifdef CONFIG_DEBUG_FEATURES
if (!priv)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_EP0NOTBOUND), 0);
return;
}
#endif
/* Make sure that we are not already unbound */
if (priv != NULL)
{
int i;
/* Unbind the constituent class drivers */
flags = enter_critical_section();
for (i = 0; i < priv->ndevices; i++)
{
CLASS_UNBIND(priv->device[i].dev, dev);
}
/* Free the pre-allocated control request */
priv->config = COMPOSITE_CONFIGIDNONE;
if (priv->ctrlreq != NULL)
{
usbdev_freereq(dev->ep0, priv->ctrlreq);
priv->ctrlreq = NULL;
}
leave_critical_section(flags);
}
}
/****************************************************************************
* Name: composite_setup
*
* Description:
* Invoked for ep0 control requests. This function probably executes
* in the context of an interrupt handler.
*
****************************************************************************/
static int composite_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 composite_dev_s *priv;
FAR struct usbdev_req_s *ctrlreq;
uint16_t value;
uint16_t index;
uint16_t len;
bool dispatched = false;
int ret = -EOPNOTSUPP;
uint8_t recipient;
#ifdef CONFIG_DEBUG_FEATURES
if (!driver || !dev || !dev->ep0 || !ctrl)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_SETUPINVALIDARGS), 0);
return -EIO;
}
#endif
/* Extract a reference to private data */
usbtrace(TRACE_CLASSSETUP, ctrl->req);
priv = ((FAR struct composite_driver_s *)driver)->dev;
#ifdef CONFIG_DEBUG_FEATURES
if (!priv)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_EP0NOTBOUND2), 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);
uinfo("type=%02x req=%02x value=%04x index=%04x len=%04x\n",
ctrl->type, ctrl->req, value, index, len);
UNUSED(index);
recipient = ctrl->type & USB_REQ_RECIPIENT_MASK;
if ((ctrl->type & USB_REQ_TYPE_MASK) == USB_REQ_TYPE_STANDARD &&
recipient == USB_REQ_RECIPIENT_DEVICE)
{
/**********************************************************************
* Standard Requests
**********************************************************************/
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, priv->descs->devdesc, ret);
}
break;
#ifdef CONFIG_USBDEV_DUALSPEED
case USB_DESC_TYPE_DEVICEQUALIFIER:
{
ret = USB_SIZEOF_QUALDESC;
memcpy(ctrlreq->buf, priv->descs->qualdesc, ret);
}
break;
case USB_DESC_TYPE_OTHERSPEEDCONFIG:
#endif
case USB_DESC_TYPE_CONFIG:
{
#ifdef CONFIG_USBDEV_DUALSPEED
ret = composite_mkcfgdesc(driver, ctrlreq->buf,
dev->speed, ctrl->value[1]);
#else
ret = composite_mkcfgdesc(driver, ctrlreq->buf);
#endif
}
break;
case USB_DESC_TYPE_STRING:
{
/* value == string index. Zero is the language ID. */
uint8_t strid = ctrl->value[0];
FAR struct usb_strdesc_s *buf =
(FAR struct usb_strdesc_s *)ctrlreq->buf;
ret = composite_mkstrdesc(driver, strid, buf);
}
break;
default:
{
usbtrace(
TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_GETUNKNOWNDESC),
value);
}
break;
}
}
break;
case USB_REQ_SETCONFIGURATION:
{
if (ctrl->type == 0)
{
int i;
if (priv->config == value)
{
/* Already configured -- Do nothing */
ret = OK;
break;
}
/* Save the configuration and inform the constituent
* classes
*/
for (i = 0; i < priv->ndevices; i++)
{
ret = CLASS_SETUP(priv->device[i].dev,
dev,
ctrl,
dataout,
outlen);
}
priv->config = value;
}
}
break;
case USB_REQ_GETCONFIGURATION:
{
if (ctrl->type == USB_DIR_IN)
{
ctrlreq->buf[0] = priv->config;
ret = 1;
}
}
break;
case USB_REQ_SETINTERFACE:
{
if (ctrl->type == USB_REQ_RECIPIENT_INTERFACE &&
priv->config != COMPOSITE_CONFIGIDNONE)
{
ret = composite_classsetup(priv, dev, ctrl, dataout, outlen);
dispatched = true;
}
}
break;
case USB_REQ_GETINTERFACE:
{
if (ctrl->type == (USB_DIR_IN | USB_REQ_RECIPIENT_INTERFACE) &&
priv->config == COMPOSITE_CONFIGIDNONE)
{
ret = composite_classsetup(priv, dev, ctrl, dataout, outlen);
dispatched = true;
}
}
break;
default:
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_UNSUPPORTEDSTDREQ),
ctrl->req);
break;
}
}
#ifdef CONFIG_COMPOSITE_MSFT_OS_DESCRIPTORS
else if (ctrl->req == USB_REQ_GETMSFTOSDESCRIPTOR &&
(ctrl->type & USB_REQ_DIR_MASK) == USB_REQ_DIR_IN &&
(ctrl->type & USB_REQ_TYPE_MASK) == USB_REQ_TYPE_VENDOR)
{
ret = composite_msftdescriptor(priv, dev, ctrl, ctrlreq, &dispatched);
}
#endif
else if (recipient == USB_REQ_RECIPIENT_INTERFACE ||
recipient == USB_REQ_RECIPIENT_ENDPOINT)
{
/**********************************************************************
* Non-Standard Class Requests
**********************************************************************/
/* Class implementations should handle their own interface and
* endpoint requests.
*/
ret = composite_classsetup(priv, dev, ctrl, dataout, outlen);
dispatched = true;
}
/* Respond to the setup command if (1) data was returned, and (2) the
* request was NOT successfully dispatched to the component class driver.
* On an error return value (ret < 0), the USB driver will stall EP0.
*/
if (ret >= 0 && !dispatched)
{
/* Setup the request */
ctrlreq->len = MIN(len, ret);
/* Only when ret is less than len do zero length packet
* need to be sent
*/
ctrlreq->flags = ret < len ? USBDEV_REQFLAGS_NULLPKT : 0;
/* And submit the request to the USB controller driver */
ret = EP_SUBMIT(dev->ep0, ctrlreq);
if (ret < 0)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_EPRESPQ),
(uint16_t)-ret);
ctrlreq->result = OK;
composite_ep0incomplete(dev->ep0, ctrlreq);
}
}
return ret;
}
/****************************************************************************
* Name: composite_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 composite_disconnect(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev)
{
FAR struct composite_dev_s *priv;
irqstate_t flags;
int i;
usbtrace(TRACE_CLASSDISCONNECT, 0);
#ifdef CONFIG_DEBUG_FEATURES
if (!driver || !dev)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_INVALIDARG), 0);
return;
}
#endif
/* Extract reference to private data */
priv = ((FAR struct composite_driver_s *)driver)->dev;
#ifdef CONFIG_DEBUG_FEATURES
if (!priv)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_EP0NOTBOUND), 0);
return;
}
#endif
/* Reset the configuration and inform the constituent class drivers of
* the disconnection.
*/
flags = enter_critical_section();
for (i = 0; i < priv->ndevices; i++)
{
CLASS_DISCONNECT(priv->device[i].dev, dev);
}
priv->config = COMPOSITE_CONFIGIDNONE;
leave_critical_section(flags);
/* Perform the soft connect function so that we will we can be
* re-enumerated.
*/
DEV_CONNECT(dev);
}
/****************************************************************************
* Name: composite_suspend
*
* Description:
* Invoked on a USB suspend event.
*
****************************************************************************/
static void composite_suspend(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev)
{
FAR struct composite_dev_s *priv;
irqstate_t flags;
int i;
usbtrace(TRACE_CLASSSUSPEND, 0);
#ifdef CONFIG_DEBUG_FEATURES
if (!dev)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_INVALIDARG), 0);
return;
}
#endif
/* Extract reference to private data */
priv = ((FAR struct composite_driver_s *)driver)->dev;
#ifdef CONFIG_DEBUG_FEATURES
if (!priv)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_EP0NOTBOUND), 0);
return;
}
#endif
/* Forward the suspend event to the constituent devices */
flags = enter_critical_section();
for (i = 0; i < priv->ndevices; i++)
{
CLASS_SUSPEND(priv->device[i].dev, priv->usbdev);
}
leave_critical_section(flags);
}
/****************************************************************************
* Name: composite_resume
*
* Description:
* Invoked on a USB resume event.
*
****************************************************************************/
static void composite_resume(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev)
{
FAR struct composite_dev_s *priv = NULL;
irqstate_t flags;
int i;
#ifdef CONFIG_DEBUG_FEATURES
if (!dev)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_INVALIDARG), 0);
return;
}
#endif
/* Extract reference to private data */
priv = ((FAR struct composite_driver_s *)driver)->dev;
#ifdef CONFIG_DEBUG_FEATURES
if (!priv)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_EP0NOTBOUND), 0);
return;
}
#endif
/* Forward the resume event to the constituent devices */
flags = enter_critical_section();
for (i = 0; i < priv->ndevices; i++)
{
CLASS_RESUME(priv->device[i].dev, priv->usbdev);
}
leave_critical_section(flags);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: composite_initialize
*
* Description:
* Register USB composite device as configured. This function will call
* board-specific implementations in order to obtain the class objects for
* each of the members of the composite.
*
* Input Parameters:
* None
*
* Returned Value:
* A non-NULL "handle" is returned on success. This handle may be used
* later with composite_uninitialize() in order to removed the composite
* device. This handle is the (untyped) internal representation of the
* the class driver instance.
*
* NULL is returned on any failure.
*
****************************************************************************/
FAR void *composite_initialize(FAR const struct usbdev_devdescs_s *devdescs,
FAR struct composite_devdesc_s *pdevices,
uint8_t ndevices)
{
FAR struct composite_alloc_s *alloc;
FAR struct composite_dev_s *priv;
FAR struct composite_driver_s *drvr;
int ret;
int i;
DEBUGASSERT(pdevices != NULL && ndevices <= NUM_DEVICES_TO_HANDLE);
/* Allocate the structures needed */
alloc = (FAR struct composite_alloc_s *)
kmm_malloc(sizeof(struct composite_alloc_s));
if (!alloc)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_ALLOCDEVSTRUCT), 0);
return NULL;
}
/* Convenience pointers into the allocated blob */
priv = &alloc->dev;
drvr = &alloc->drvr;
/* Initialize the USB composite driver structure */
memset(priv, 0, sizeof(struct composite_dev_s));
/* Initialize USB device descriptor */
priv->descs = devdescs;
priv->cfgdescsize = USB_SIZEOF_CFGDESC;
priv->ninterfaces = 0;
/* Get the constituent class driver objects */
for (i = 0; i < ndevices; i++)
{
FAR struct composite_devobj_s *devobj = &priv->device[i];
devobj->compdesc = pdevices[i];
ret =
devobj->compdesc.classobject(devobj->compdesc.minor,
&devobj->compdesc.devinfo,
&devobj->dev);
if (ret < 0)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_CLASSOBJECT),
(uint16_t)-ret);
goto errout_with_alloc;
}
priv->cfgdescsize += devobj->compdesc.cfgdescsize;
priv->ninterfaces += devobj->compdesc.devinfo.ninterfaces;
}
priv->ndevices = ndevices;
/* 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 composite class driver */
ret = usbdev_register(&drvr->drvr);
if (ret < 0)
{
usbtrace(TRACE_CLSERROR(USBCOMPOSITE_TRACEERR_DEVREGISTER),
(uint16_t)-ret);
goto errout_with_alloc;
}
return (FAR void *)alloc;
errout_with_alloc:
kmm_free(alloc);
return NULL;
}
/****************************************************************************
* Name: composite_uninitialize
*
* Description:
* Un-initialize the USB composite driver. The handle is the USB composite
* class' device object as was returned by composite_initialize(). This
* function will call board-specific implementations in order to free the
* class objects for each of the members of the composite.
*
* Input Parameters:
* handle - The handle returned by a previous call to
* composite_initialize().
*
* Returned Value:
* None
*
****************************************************************************/
void composite_uninitialize(FAR void *handle)
{
FAR struct composite_alloc_s *alloc =
(FAR struct composite_alloc_s *)handle;
FAR struct composite_dev_s *priv;
int i;
DEBUGASSERT(alloc != NULL);
/* First phase uninitialization each of the member classes */
priv = &alloc->dev;
for (i = 0; i < priv->ndevices; i++)
{
priv->device[i].compdesc.uninitialize(priv->device[i].dev);
}
/* Then unregister and destroy the composite class */
usbdev_unregister(&alloc->drvr.drvr);
/* Free any resources used by the composite driver */
/* None */
/* Second phase uninitialization: Clean up all memory resources */
for (i = 0; i < priv->ndevices; i++)
{
priv->device[i].compdesc.uninitialize(priv->device[i].dev);
}
/* Then free the composite driver state structure itself */
kmm_free(priv);
}
/****************************************************************************
* Name: composite_ep0submit
*
* Description:
* Members of the composite cannot send on EP0 directly because EP0 is
* is "owned" by the composite device. Instead, when configured as members
* of a composite device, those classes should call this method so that
* the composite device can send on EP0 onbehalf of the class.
*
****************************************************************************/
int composite_ep0submit(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev,
FAR struct usbdev_req_s *ctrlreq,
FAR const struct usb_ctrlreq_s *ctrl)
{
bool ep0submit = true;
/* Some EP0 responses must be send only once from the composite class */
if ((ctrl->type & USB_REQ_TYPE_MASK) == USB_REQ_TYPE_STANDARD)
{
if (ctrl->req == USB_REQ_SETCONFIGURATION)
{
ep0submit = false;
}
}
if (ep0submit)
{
return EP_SUBMIT(dev->ep0, ctrlreq);
}
else
{
return 0;
}
}
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