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incubator-nuttx/drivers/usbdev/usbdev_fs.c

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/****************************************************************************
* drivers/usbdev/usbdev_fs.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 <debug.h>
#include <fcntl.h>
#include <poll.h>
#include <stdio.h>
#include <nuttx/nuttx.h>
#include <nuttx/kmalloc.h>
#include <nuttx/queue.h>
#include <nuttx/mutex.h>
#include <nuttx/usb/usbdev.h>
#include <nuttx/usb/usbdev_trace.h>
#include <nuttx/usb/composite.h>
#include <nuttx/fs/fs.h>
#include "composite.h"
#include "usbdev_fs.h"
/****************************************************************************
* Private Types
****************************************************************************/
/* Container to support a list of requests */
struct usbdev_fs_req_s
{
sq_entry_t node; /* Implements a singly linked list */
FAR struct usbdev_req_s *req; /* The contained request */
uint16_t offset; /* Offset to valid data in the RX request */
};
/* Manage char device non blocking io */
typedef struct usbdev_fs_waiter_sem_s
{
sem_t sem;
FAR struct usbdev_fs_waiter_sem_s *next;
} usbdev_fs_waiter_sem_t;
/* This structure describes the char device */
struct usbdev_fs_ep_s
{
uint8_t crefs; /* Count of opened instances */
mutex_t lock; /* Enforces device exclusive access */
FAR struct usbdev_ep_s *ep; /* EP entry */
FAR usbdev_fs_waiter_sem_t *sems; /* List of blocking request */
struct sq_queue_s reqq; /* Available request containers */
FAR struct usbdev_fs_req_s *reqbuffer; /* Request buffer */
FAR struct pollfd *fds[CONFIG_USBDEV_FS_NPOLLWAITERS];
};
struct usbdev_fs_dev_s
{
FAR struct composite_dev_s *cdev;
bool registered;
uint8_t config;
struct usbdev_devinfo_s devinfo;
FAR struct usbdev_fs_ep_s *eps;
};
struct usbdev_fs_driver_s
{
struct usbdevclass_driver_s drvr;
struct usbdev_fs_dev_s dev;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* USB class device *********************************************************/
static int usbdev_fs_classbind(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev);
static void usbdev_fs_classunbind(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev);
static int usbdev_fs_classsetup(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
usbdev_fs_classdisconnect(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev);
static void usbdev_fs_classsuspend(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev);
static void usbdev_fs_classresume(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev);
/* Char device Operations ***************************************************/
static int usbdev_fs_open(FAR struct file *filep);
static int usbdev_fs_close(FAR struct file *filep);
static ssize_t usbdev_fs_read(FAR struct file *filep, FAR char *buffer,
size_t len);
static ssize_t usbdev_fs_write(FAR struct file *filep,
FAR const char *buffer, size_t len);
static int usbdev_fs_poll(FAR struct file *filep, FAR struct pollfd *fds,
bool setup);
/****************************************************************************
* Private Data
****************************************************************************/
/* USB class device *********************************************************/
static const struct usbdevclass_driverops_s g_usbdev_fs_classops =
{
usbdev_fs_classbind, /* bind */
usbdev_fs_classunbind, /* unbind */
usbdev_fs_classsetup, /* setup */
usbdev_fs_classdisconnect, /* disconnect */
usbdev_fs_classsuspend, /* suspend */
usbdev_fs_classresume /* resume */
};
/* Char device **************************************************************/
static const struct file_operations g_usbdev_fs_fops =
{
usbdev_fs_open, /* open */
usbdev_fs_close, /* close */
usbdev_fs_read, /* read */
usbdev_fs_write, /* write */
NULL, /* seek */
NULL, /* ioctl */
NULL, /* mmap */
NULL, /* truncate */
usbdev_fs_poll /* poll */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: usbdev_fs_notify
*
* Description:
* Notify threads waiting to read device. This function must be called
* with interrupt disabled.
*
****************************************************************************/
static void usbdev_fs_notify(FAR struct usbdev_fs_ep_s *fs_ep,
pollevent_t eventset)
{
/* Notify all of the waiting readers */
FAR usbdev_fs_waiter_sem_t *cur_sem = fs_ep->sems;
while (cur_sem != NULL)
{
nxsem_post(&cur_sem->sem);
cur_sem = cur_sem->next;
}
fs_ep->sems = NULL;
/* Notify all poll/select waiters */
poll_notify(fs_ep->fds, CONFIG_USBDEV_FS_NPOLLWAITERS, eventset);
}
/****************************************************************************
* Name: usbdev_fs_submit_wrreq
*
* Description:
* Handle completion of write request on the bulk IN endpoint.
*
****************************************************************************/
static int usbdev_fs_submit_wrreq(FAR struct usbdev_ep_s *ep,
FAR struct usbdev_fs_req_s *container,
uint16_t len)
{
FAR struct usbdev_req_s *req = container->req;
req->len = len;
req->flags = 0;
req->priv = container;
return EP_SUBMIT(ep, req);
}
/****************************************************************************
* Name: usbdev_fs_submit_rdreq
*
* Description:
* Handle completion of read request on the bulk OUT endpoint.
*
****************************************************************************/
static int usbdev_fs_submit_rdreq(FAR struct usbdev_ep_s *ep,
FAR struct usbdev_fs_req_s *container)
{
FAR struct usbdev_req_s *req = container->req;
req->len = ep->maxpacket;
return EP_SUBMIT(ep, req);
}
/****************************************************************************
* Name: usbdev_fs_rdcomplete
*
* Description:
* Handle completion of read request on the bulk OUT endpoint.
*
****************************************************************************/
static void usbdev_fs_rdcomplete(FAR struct usbdev_ep_s *ep,
FAR struct usbdev_req_s *req)
{
FAR struct usbdev_fs_req_s *container;
FAR struct usbdev_fs_ep_s *fs_ep;
irqstate_t flags;
/* Sanity check */
#ifdef CONFIG_DEBUG_FEATURES
if (!ep || !ep->priv || !req)
{
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0);
return;
}
#endif
/* Extract references to private data */
fs_ep = (FAR struct usbdev_fs_ep_s *)ep->fs;
container = (FAR struct usbdev_fs_req_s *)req->priv;
/* Process the received data unless this is some unusual condition */
switch (req->result)
{
case 0: /* Normal completion */
usbtrace(TRACE_CLASSRDCOMPLETE, sq_count(&fs_ep->reqq));
/* Restart request due to either no reader or
* empty frame received.
*/
if (fs_ep->crefs == 0)
{
uwarn("drop frame\n");
goto restart_req;
}
if (req->xfrd <= 0)
{
goto restart_req;
}
/* Queue request and notify readers */
flags = enter_critical_section();
/* Put request on RX pending queue */
container->offset = 0;
sq_addlast(&container->node, &fs_ep->reqq);
usbdev_fs_notify(fs_ep, POLLIN);
leave_critical_section(flags);
return;
case -ESHUTDOWN: /* Disconnection */
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_RDSHUTDOWN), 0);
return;
default: /* Some other error occurred */
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_RDUNEXPECTED),
(uint16_t)-req->result);
break;
};
restart_req:
/* Restart request */
usbdev_fs_submit_rdreq(fs_ep->ep, container);
}
/****************************************************************************
* Name: usbdev_fs_wrcomplete
*
* Description:
* Handle completion of write request. This function probably executes
* in the context of an interrupt handler.
*
****************************************************************************/
static void usbdev_fs_wrcomplete(FAR struct usbdev_ep_s *ep,
FAR struct usbdev_req_s *req)
{
FAR struct usbdev_fs_req_s *container;
FAR struct usbdev_fs_ep_s *fs_ep;
irqstate_t flags;
/* Sanity check */
#ifdef CONFIG_DEBUG_FEATURES
if (!ep || !ep->priv || !req || !req->priv)
{
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_INVALIDARG), 0);
return;
}
#endif
/* Extract references to private data */
fs_ep = (FAR struct usbdev_fs_ep_s *)ep->fs;
container = (FAR struct usbdev_fs_req_s *)req->priv;
/* Return the write request to the free list */
flags = enter_critical_section();
sq_addlast(&container->node, &fs_ep->reqq);
/* Check for termination condition */
switch (req->result)
{
case OK: /* Normal completion */
{
usbtrace(TRACE_CLASSWRCOMPLETE, sq_count(&fs_ep->reqq));
/* Notify all waiting writers that write req is available */
usbdev_fs_notify(fs_ep, POLLOUT);
}
break;
case -ESHUTDOWN: /* Disconnection */
{
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_WRSHUTDOWN),
sq_count(&fs_ep->reqq));
}
break;
default: /* Some other error occurred */
{
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_WRUNEXPECTED),
(uint16_t)-req->result);
}
break;
}
leave_critical_section(flags);
}
/****************************************************************************
* Name: usbdev_fs_blocking_io
*
* Description:
* Handle read/write blocking io.
*
****************************************************************************/
static int usbdev_fs_blocking_io(FAR struct usbdev_fs_ep_s *fs_ep,
FAR usbdev_fs_waiter_sem_t **list,
FAR struct sq_queue_s *queue)
{
FAR usbdev_fs_waiter_sem_t sem;
irqstate_t flags;
int ret;
flags = enter_critical_section();
if (!sq_empty(queue))
{
/* Queue not empty after all */
leave_critical_section(flags);
return 0;
}
nxsem_init(&sem.sem, 0, 0);
/* Register waiter semaphore */
sem.next = *list;
*list = &sem;
leave_critical_section(flags);
nxmutex_unlock(&fs_ep->lock);
/* Wait for USB device to notify */
ret = nxsem_wait(&sem.sem);
/* Interrupted wait, unregister semaphore
* TODO ensure that lock wait does not fail (ECANCELED)
*/
nxmutex_lock(&fs_ep->lock);
if (ret < 0)
{
flags = enter_critical_section();
FAR usbdev_fs_waiter_sem_t *cur_sem = *list;
if (cur_sem == &sem)
{
*list = sem.next;
}
else
{
while (cur_sem)
{
if (cur_sem->next == &sem)
{
cur_sem->next = sem.next;
break;
}
}
}
leave_critical_section(flags);
nxmutex_unlock(&fs_ep->lock);
}
nxsem_destroy(&sem.sem);
return ret;
}
/****************************************************************************
* Name: usbdev_fs_open
*
* Description:
* Open usbdev fs device. Only one open() instance is supported.
*
****************************************************************************/
static int usbdev_fs_open(FAR struct file *filep)
{
FAR struct inode *inode = filep->f_inode;
FAR struct usbdev_fs_ep_s *fs_ep = inode->i_private;
int ret;
/* Get exclusive access to the device structures */
ret = nxmutex_lock(&fs_ep->lock);
if (ret < 0)
{
return ret;
}
finfo("entry: <%s> %d\n", inode->i_name, fs_ep->crefs);
fs_ep->crefs += 1;
assert(fs_ep->crefs != 0);
nxmutex_unlock(&fs_ep->lock);
return ret;
}
/****************************************************************************
* Name: usbdev_fs_close
*
* Description:
* Close usbdev fs device.
*
****************************************************************************/
static int usbdev_fs_close(FAR struct file *filep)
{
FAR struct inode *inode = filep->f_inode;
FAR struct usbdev_fs_ep_s *fs_ep = inode->i_private;
int ret;
/* Get exclusive access to the device structures */
ret = nxmutex_lock(&fs_ep->lock);
if (ret < 0)
{
return ret;
}
finfo("entry: <%s> %d\n", inode->i_name, fs_ep->crefs);
fs_ep->crefs -= 1;
assert(fs_ep->crefs >= 0);
nxmutex_unlock(&fs_ep->lock);
return OK;
}
/****************************************************************************
* Name: usbdev_fs_read
*
* Description:
* Read usbdev fs device.
*
****************************************************************************/
static ssize_t usbdev_fs_read(FAR struct file *filep, FAR char *buffer,
size_t len)
{
FAR struct inode *inode = filep->f_inode;
FAR struct usbdev_fs_ep_s *fs_ep = inode->i_private;
size_t retlen = 0;
irqstate_t flags;
int ret;
assert(len > 0 && buffer != NULL);
ret = nxmutex_lock(&fs_ep->lock);
if (ret < 0)
{
return ret;
}
/* Check for available data */
if (sq_empty(&fs_ep->reqq))
{
if (filep->f_oflags & O_NONBLOCK)
{
nxmutex_unlock(&fs_ep->lock);
return -EAGAIN;
}
do
{
/* RX queue seems empty. Check again with interrupts disabled */
ret = usbdev_fs_blocking_io(
fs_ep, &fs_ep->sems, &fs_ep->reqq);
if (ret < 0)
{
return ret;
}
}
while (sq_empty(&fs_ep->reqq));
}
/* Device ready for read */
while (!sq_empty(&fs_ep->reqq) && len > 0)
{
FAR struct usbdev_fs_req_s *container;
uint16_t reqlen;
/* Process each packet in the priv->reqq list */
container = container_of(sq_peek(&fs_ep->reqq),
struct usbdev_fs_req_s, node);
reqlen = container->req->xfrd - container->offset;
if (reqlen > len)
{
/* Output buffer full */
memcpy(&buffer[retlen],
&container->req->buf[container->offset],
len);
container->offset += len;
retlen += len;
break;
}
memcpy(&buffer[retlen],
&container->req->buf[container->offset], reqlen);
retlen += reqlen;
len -= reqlen;
/* The entire packet was processed and may be removed from the
* pending RX list.
*/
/* FIXME use atomic queue primitives ? */
flags = enter_critical_section();
sq_remfirst(&fs_ep->reqq);
leave_critical_section(flags);
ret = usbdev_fs_submit_rdreq(fs_ep->ep, container);
if (ret < 0)
{
/* TODO handle error */
PANIC();
}
}
nxmutex_unlock(&fs_ep->lock);
return retlen;
}
/****************************************************************************
* Name: usbdev_fs_write
*
* Description:
* Write usbdev fs device.
*
****************************************************************************/
static ssize_t usbdev_fs_write(FAR struct file *filep,
FAR const char *buffer, size_t len)
{
FAR struct inode *inode = filep->f_inode;
FAR struct usbdev_fs_ep_s *fs_ep = inode->i_private;
FAR struct usbdev_fs_req_s *container;
FAR struct usbdev_req_s *req;
irqstate_t flags;
int wlen = 0;
int ret;
ret = nxmutex_lock(&fs_ep->lock);
if (ret < 0)
{
return ret;
}
/* Check for available write request */
if (sq_empty(&fs_ep->reqq))
{
if (filep->f_oflags & O_NONBLOCK)
{
ret = -EAGAIN;
goto errout;
}
do
{
/* TX queue seems empty. Check again with interrupts disabled */
ret = usbdev_fs_blocking_io(
fs_ep, &fs_ep->sems, &fs_ep->reqq);
if (ret < 0)
{
return ret;
}
}
while (sq_empty(&fs_ep->reqq));
}
/* Device ready for write */
while (len > 0 && !sq_empty(&fs_ep->reqq))
{
uint16_t cur_len;
/* Get available TX request slot */
flags = enter_critical_section();
container = container_of(sq_remfirst(&fs_ep->reqq),
struct usbdev_fs_req_s, node);
leave_critical_section(flags);
req = container->req;
/* Fill the request with data */
if (len > fs_ep->ep->maxpacket)
{
cur_len = fs_ep->ep->maxpacket;
}
else
{
cur_len = len;
}
memcpy(req->buf, &buffer[wlen], cur_len);
/* Then submit the request to the endpoint */
ret = usbdev_fs_submit_wrreq(fs_ep->ep, container, cur_len);
if (ret < 0)
{
/* TODO add tx request back in txfree queue */
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_SUBMITFAIL),
(uint16_t)-ret);
PANIC();
break;
}
wlen += cur_len;
len -= cur_len;
}
assert(wlen > 0);
ret = wlen;
errout:
nxmutex_unlock(&fs_ep->lock);
return ret;
}
/****************************************************************************
* Name: usbdev_fs_poll
*
* Description:
* Poll usbdev fs device.
*
****************************************************************************/
static int usbdev_fs_poll(FAR struct file *filep, FAR struct pollfd *fds,
bool setup)
{
FAR struct inode *inode = filep->f_inode;
FAR struct usbdev_fs_ep_s *fs_ep = inode->i_private;
pollevent_t eventset;
irqstate_t flags;
int ret;
int i;
ret = nxmutex_lock(&fs_ep->lock);
if (ret < 0)
{
return ret;
}
if (!setup)
{
/* This is a request to tear down the poll. */
FAR struct pollfd **slot = (FAR struct pollfd **)fds->priv;
/* Remove all memory of the poll setup */
*slot = NULL;
fds->priv = NULL;
goto errout;
}
/* FIXME only parts of this function required interrupt disabled */
flags = enter_critical_section();
/* This is a request to set up the poll. Find an available
* slot for the poll structure reference
*/
for (i = 0; i < CONFIG_USBDEV_FS_NPOLLWAITERS; i++)
{
/* Find an available slot */
if (!fs_ep->fds[i])
{
/* Bind the poll structure and this slot */
fs_ep->fds[i] = fds;
fds->priv = &fs_ep->fds[i];
break;
}
}
if (i >= CONFIG_USBDEV_FS_NPOLLWAITERS)
{
fds->priv = NULL;
ret = -EBUSY;
goto exit_leave_critical;
}
eventset = 0;
/* Notify the POLLIN/POLLOUT event if at least one request is available */
if (!sq_empty(&fs_ep->reqq))
{
if (USB_ISEPIN(fs_ep->ep->eplog))
{
eventset |= POLLOUT;
}
else
{
eventset |= POLLIN;
}
}
poll_notify(fs_ep->fds, CONFIG_USBDEV_FS_NPOLLWAITERS, eventset);
exit_leave_critical:
leave_critical_section(flags);
errout:
nxmutex_unlock(&fs_ep->lock);
return ret;
}
/****************************************************************************
* Name: usbdev_fs_connect
*
* Description:
* Notify usbdev fs device connect state.
*
****************************************************************************/
static void usbdev_fs_connect(FAR struct usbdev_fs_dev_s *fs, int connect)
{
FAR struct usbdev_devinfo_s *devinfo = &fs->devinfo;
FAR struct usbdev_fs_ep_s *fs_ep;
uint16_t cnt;
irqstate_t flags = enter_critical_section();
if (connect)
{
/* Notify poll/select with POLLIN */
for (cnt = 0; cnt < devinfo->nendpoints; cnt++)
{
fs_ep = &fs->eps[cnt];
poll_notify(fs_ep->fds, CONFIG_USBDEV_FS_NPOLLWAITERS, POLLIN);
}
}
else
{
/* Notify all of the char device */
for (cnt = 0; cnt < devinfo->nendpoints; cnt++)
{
fs_ep = &fs->eps[cnt];
usbdev_fs_notify(fs_ep, POLLERR | POLLHUP);
}
}
leave_critical_section(flags);
}
/****************************************************************************
* Name: usbdev_fs_ep_bind
*
* Description:
* Bind usbdev fs device.
*
****************************************************************************/
static int usbdev_fs_ep_bind(FAR const char *devname,
FAR struct usbdev_s *dev, uint8_t epno,
FAR const struct usbdev_epinfo_s *epinfo,
FAR struct usbdev_fs_ep_s *fs_ep)
{
#ifdef CONFIG_USBDEV_DUALSPEED
uint16_t reqsize = epinfo->hssize;
#else
uint16_t reqsize = epinfo->fssize;
#endif
uint16_t i;
/* Initialize fs ep lock */
nxmutex_init(&fs_ep->lock);
/* Initialize request queue */
sq_init(&fs_ep->reqq);
/* Pre-allocate the endpoint */
fs_ep->ep = DEV_ALLOCEP(dev, epno,
USB_ISEPIN(epinfo->desc.addr),
epinfo->desc.attr & USB_EP_ATTR_XFERTYPE_MASK);
if (fs_ep->ep == NULL)
{
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_EPBULKINALLOCFAIL), 0);
return -ENODEV;
}
fs_ep->ep->fs = fs_ep;
/* Initialize request buffer */
fs_ep->reqbuffer =
kmm_zalloc(sizeof(struct usbdev_fs_req_s) * epinfo->reqnum);
if (!fs_ep->reqbuffer)
{
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_RDALLOCREQ), 0);
return -ENOMEM;
}
for (i = 0; i < epinfo->reqnum; i++)
{
FAR struct usbdev_fs_req_s *container;
container = &fs_ep->reqbuffer[i];
container->req = usbdev_allocreq(fs_ep->ep, reqsize);
if (container->req == NULL)
{
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_RDALLOCREQ), -ENOMEM);
return -ENOMEM;
}
container->req->priv = container;
if (USB_ISEPIN(epinfo->desc.addr))
{
container->req->callback = usbdev_fs_wrcomplete;
sq_addlast(&container->node, &fs_ep->reqq);
}
}
fs_ep->crefs = 0;
return register_driver(devname, &g_usbdev_fs_fops, 0666, fs_ep);
}
/****************************************************************************
* Name: usbdev_fs_ep_unbind
*
* Description:
* Unbind usbdev fs endpoint.
*
****************************************************************************/
static void usbdev_fs_ep_unbind(FAR const char *devname,
FAR struct usbdev_s *dev,
FAR const struct usbdev_epinfo_s *epinfo,
FAR struct usbdev_fs_ep_s *fs_ep)
{
uint16_t i;
/* Release request buffer */
if (fs_ep->reqbuffer)
{
for (i = 0; i < epinfo->reqnum; i++)
{
FAR struct usbdev_fs_req_s *container =
&fs_ep->reqbuffer[i];
if (container->req)
{
usbdev_freereq(fs_ep->ep, container->req);
}
}
kmm_free(fs_ep->reqbuffer);
fs_ep->reqbuffer = NULL;
}
sq_init(&fs_ep->reqq);
/* Release endpoint */
if (fs_ep->ep != NULL)
{
fs_ep->ep->fs = NULL;
DEV_FREEEP(dev, fs_ep->ep);
fs_ep->ep = NULL;
}
fs_ep->crefs = 0;
unregister_driver(devname);
nxmutex_destroy(&fs_ep->lock);
}
/****************************************************************************
* Name: usbdev_fs_classresetconfig
*
* Description:
* Mark the device as not configured and disable all endpoints.
*
****************************************************************************/
static void usbdev_fs_classresetconfig(FAR struct usbdev_fs_dev_s *fs)
{
FAR struct usbdev_devinfo_s *devinfo = &fs->devinfo;
uint16_t i;
/* Are we configured? */
if (fs->config != COMPOSITE_CONFIGIDNONE)
{
/* Yes.. but not anymore */
usbdev_fs_connect(fs, 0);
/* Disable endpoints. This should force completion of all pending
* transfers.
*/
for (i = 0; i < devinfo->nendpoints; i++)
{
EP_DISABLE(fs->eps[i].ep);
}
}
}
/****************************************************************************
* Name: usbdev_fs_classsetconfig
*
* Description:
* Set the device configuration by allocating and configuring endpoints and
* by allocating and queue read and write requests.
*
****************************************************************************/
static int usbdev_fs_classsetconfig(FAR struct usbdev_fs_dev_s *fs,
uint8_t config)
{
FAR struct usbdev_devinfo_s *devinfo = &fs->devinfo;
struct usb_epdesc_s epdesc;
bool hispeed = false;
uint16_t i;
uint16_t j;
int ret;
/* Discard the previous configuration data */
usbdev_fs_classresetconfig(fs);
/* Was this a request to simply discard the current configuration? */
if (config == COMPOSITE_CONFIGIDNONE)
{
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_CONFIGNONE), 0);
return 0;
}
#ifdef CONFIG_USBDEV_DUALSPEED
hispeed = (fs->cdev->usbdev->speed == USB_SPEED_HIGH);
#endif
for (i = 0; i < devinfo->nendpoints; i++)
{
FAR struct usbdev_fs_ep_s *fs_ep = &fs->eps[i];
usbdev_copy_epdesc(&epdesc, devinfo->epno[i],
hispeed, devinfo->epinfos[i]);
ret = EP_CONFIGURE(fs_ep->ep, &epdesc,
(i == (devinfo->nendpoints - 1)));
if (ret < 0)
{
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_EPBULKINCONFIGFAIL), 0);
goto errout;
}
fs_ep->ep->priv = fs;
if (USB_ISEPOUT(fs_ep->ep->eplog))
{
for (j = 0; j < devinfo->epinfos[i]->reqnum; j++)
{
FAR struct usbdev_fs_req_s *container;
container = &fs_ep->reqbuffer[j];
container->req->callback = usbdev_fs_rdcomplete;
usbdev_fs_submit_rdreq(fs_ep->ep, container);
}
}
}
fs->config = config;
/* We are successfully configured. Char device is now active */
usbdev_fs_connect(fs, 1);
return OK;
errout:
usbdev_fs_classresetconfig(fs);
return ret;
}
/****************************************************************************
* Name: usbdev_fs_classbind
*
* Description:
* Invoked when the driver is bound to a USB device driver
*
****************************************************************************/
static int usbdev_fs_classbind(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev)
{
FAR struct usbdev_fs_driver_s *fs_drvr = container_of(
driver, FAR struct usbdev_fs_driver_s, drvr);
FAR struct usbdev_fs_dev_s *fs = &fs_drvr->dev;
FAR struct usbdev_devinfo_s *devinfo = &fs->devinfo;
char devname[32];
uint16_t i;
int ret;
/* Bind the composite device */
fs->cdev = dev->ep0->priv;
/* Initialize fs eqs */
fs->eps = kmm_zalloc(devinfo->nendpoints * sizeof(struct usbdev_fs_ep_s));
if (fs->eps == NULL)
{
uerr("Failed to malloc fs eqs");
return -ENOMEM;
}
for (i = 0; i < devinfo->nendpoints; i++)
{
snprintf(devname, sizeof(devname), "%s/ep%d",
devinfo->name, i + 1);
ret = usbdev_fs_ep_bind(devname, dev,
devinfo->epno[i],
devinfo->epinfos[i],
&fs->eps[i]);
if (ret < 0)
{
uerr("Failed to bind fs ep");
goto errout;
}
}
return OK;
errout:
usbdev_fs_classunbind(driver, dev);
return ret;
}
/****************************************************************************
* Name: usbdev_fs_classunbind
*
* Description:
* Invoked when the driver is unbound from a USB device driver
*
****************************************************************************/
static void usbdev_fs_classunbind(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev)
{
FAR struct usbdev_fs_driver_s *fs_drvr = container_of(
driver, FAR struct usbdev_fs_driver_s, drvr);
FAR struct usbdev_fs_dev_s *fs = &fs_drvr->dev;
FAR struct usbdev_devinfo_s *devinfo = &fs->devinfo;
char devname[32];
uint16_t i;
if (fs->eps != NULL)
{
for (i = 0; i < devinfo->ninterfaces; i++)
{
snprintf(devname, sizeof(devname), "%s/ep%d",
devinfo->name, i + 1);
usbdev_fs_ep_unbind(devname, dev,
devinfo->epinfos[i],
&fs->eps[i]);
}
kmm_free(fs->eps);
fs->eps = NULL;
}
fs->cdev = NULL;
}
/****************************************************************************
* Name: usbdev_fs_classsetup
*
* Description:
* Invoked for ep0 control requests. This function probably executes
* in the context of an interrupt handler.
*
****************************************************************************/
static int usbdev_fs_classsetup(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 usbdev_fs_driver_s *fs_drvr = container_of(
driver, FAR struct usbdev_fs_driver_s, drvr);
FAR struct usbdev_fs_dev_s *fs = &fs_drvr->dev;
uint16_t value;
int ret = -EOPNOTSUPP;
/* Extract the little-endian 16-bit values to host order */
value = GETUINT16(ctrl->value);
if ((ctrl->type & USB_REQ_TYPE_MASK) == USB_REQ_TYPE_STANDARD &&
ctrl->req == USB_REQ_SETCONFIGURATION &&
ctrl->type == 0)
{
ret = usbdev_fs_classsetconfig(fs, value);
}
else
{
/* send to userspace???? */
}
/* Returning a negative value will cause a STALL */
return ret;
}
/****************************************************************************
* Name: usbdev_fs_classdisconnect
*
* 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
usbdev_fs_classdisconnect(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev)
{
FAR struct usbdev_fs_driver_s *fs_drvr = container_of(
driver, FAR struct usbdev_fs_driver_s, drvr);
FAR struct usbdev_fs_dev_s *fs = &fs_drvr->dev;
/* Reset the configuration */
usbdev_fs_classresetconfig(fs);
}
/****************************************************************************
* Name: usbdev_fs_classsuspend
*
* Description:
* Handle the USB suspend event.
*
****************************************************************************/
static void usbdev_fs_classsuspend(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev)
{
FAR struct usbdev_fs_driver_s *fs_drvr = container_of(
driver, FAR struct usbdev_fs_driver_s, drvr);
FAR struct usbdev_fs_dev_s *fs = &fs_drvr->dev;
usbdev_fs_connect(fs, 0);
}
/****************************************************************************
* Name: usbdev_fs_classresume
*
* Description:
* Handle the USB resume event.
*
****************************************************************************/
static void usbdev_fs_classresume(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev)
{
FAR struct usbdev_fs_driver_s *fs_drvr = container_of(
driver, FAR struct usbdev_fs_driver_s, drvr);
FAR struct usbdev_fs_dev_s *fs = &fs_drvr->dev;
usbdev_fs_connect(fs, 1);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: usbclass_classobject
*
* Description:
* Register USB driver and return the class object.
*
* Returned Value:
* 0 on success, negative error code on failure.
*
****************************************************************************/
int usbdev_fs_classobject(int minor,
FAR struct usbdev_devinfo_s *devinfo,
FAR struct usbdevclass_driver_s **classdev)
{
FAR struct usbdev_fs_driver_s *alloc;
if (devinfo->nendpoints > CONFIG_USBDEV_FS_EPNUM)
{
uerr("class epnum error");
return -EINVAL;
}
alloc = kmm_zalloc(sizeof(struct usbdev_fs_driver_s));
if (!alloc)
{
usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_ALLOCDEVSTRUCT), 0);
return -ENOMEM;
}
/* Save the caller provided device description */
memcpy(&alloc->dev.devinfo, devinfo,
sizeof(struct usbdev_devinfo_s));
/* Initialize the USB class driver structure */
alloc->drvr.ops = &g_usbdev_fs_classops;
*classdev = &alloc->drvr;
alloc->dev.registered = true;
return OK;
}
/****************************************************************************
* Name: usbdev_fs_classuninitialize
*
* Description:
* Free allocated class memory
*
****************************************************************************/
void usbdev_fs_classuninitialize(FAR struct usbdevclass_driver_s *classdev)
{
FAR struct usbdev_fs_driver_s *alloc = container_of(
classdev, FAR struct usbdev_fs_driver_s, drvr);
if (alloc->dev.registered)
{
alloc->dev.registered = false;
}
else
{
kmm_free(alloc);
}
}
/****************************************************************************
* Name: usbdev_fs_initialize
*
* Description:
* USBDEV fs initialize
*
* Returned Value:
* 0 on success, negative error code on failure.
*
****************************************************************************/
FAR void *usbdev_fs_initialize(FAR const struct usbdev_devdescs_s *devdescs,
FAR struct composite_devdesc_s *pdevice)
{
return composite_initialize(devdescs, pdevice, 1);
}
/****************************************************************************
* Name: usbdev_fs_uninitialize
*
* Description:
* USBDEV fs uninitialize
*
* Returned Value:
* 0 on success, negative error code on failure.
*
****************************************************************************/
void usbdev_fs_uninitialize(FAR void *handle)
{
composite_uninitialize(handle);
}
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